text: (function(factory) {
  	if (typeof define === 'function' && define.amd) {
  		define([ 'jquery', 'moment' ], factory);
  	}
  	else if (typeof exports === 'object') { // Node/CommonJS
  		module.exports = factory(require('jquery'), require('moment'));
  	}
  	else {
  		factory(jQuery, moment);
  	}
  })(function($, moment) {
  
  ;;
  
  var FC = $.fullCalendar = {
  	version: "3.0.1",
  	internalApiVersion: 6
  };
  var fcViews = FC.views = {};
  
  
  $.fn.fullCalendar = function(options) {
  	var args = Array.prototype.slice.call(arguments, 1); // for a possible method call
  	var res = this; // what this function will return (this jQuery object by default)
  
  	this.each(function(i, _element) { // loop each DOM element involved
  		var element = $(_element);
  		var calendar = element.data('fullCalendar'); // get the existing calendar object (if any)
  		var singleRes; // the returned value of this single method call
  
  		// a method call
  		if (typeof options === 'string') {
  			if (calendar && $.isFunction(calendar[options])) {
  				singleRes = calendar[options].apply(calendar, args);
  				if (!i) {
  					res = singleRes; // record the first method call result
  				}
  				if (options === 'destroy') { // for the destroy method, must remove Calendar object data
  					element.removeData('fullCalendar');
  				}
  			}
  		}
  		// a new calendar initialization
  		else if (!calendar) { // don't initialize twice
  			calendar = new Calendar(element, options);
  			element.data('fullCalendar', calendar);
  			calendar.render();
  		}
  	});
  
  	return res;
  };
  
  
  var complexOptions = [ // names of options that are objects whose properties should be combined
  	'header',
  	'buttonText',
  	'buttonIcons',
  	'themeButtonIcons'
  ];
  
  
  // Merges an array of option objects into a single object
  function mergeOptions(optionObjs) {
  	return mergeProps(optionObjs, complexOptions);
  }
  
  ;;
  
  // exports
  FC.intersectRanges = intersectRanges;
  FC.applyAll = applyAll;
  FC.debounce = debounce;
  FC.isInt = isInt;
  FC.htmlEscape = htmlEscape;
  FC.cssToStr = cssToStr;
  FC.proxy = proxy;
  FC.capitaliseFirstLetter = capitaliseFirstLetter;
  
  
  /* FullCalendar-specific DOM Utilities
  ----------------------------------------------------------------------------------------------------------------------*/
  
  
  // Given the scrollbar widths of some other container, create borders/margins on rowEls in order to match the left
  // and right space that was offset by the scrollbars. A 1-pixel border first, then margin beyond that.
  function compensateScroll(rowEls, scrollbarWidths) {
  	if (scrollbarWidths.left) {
  		rowEls.css({
  			'border-left-width': 1,
  			'margin-left': scrollbarWidths.left - 1
  		});
  	}
  	if (scrollbarWidths.right) {
  		rowEls.css({
  			'border-right-width': 1,
  			'margin-right': scrollbarWidths.right - 1
  		});
  	}
  }
  
  
  // Undoes compensateScroll and restores all borders/margins
  function uncompensateScroll(rowEls) {
  	rowEls.css({
  		'margin-left': '',
  		'margin-right': '',
  		'border-left-width': '',
  		'border-right-width': ''
  	});
  }
  
  
  // Make the mouse cursor express that an event is not allowed in the current area
  function disableCursor() {
  	$('body').addClass('fc-not-allowed');
  }
  
  
  // Returns the mouse cursor to its original look
  function enableCursor() {
  	$('body').removeClass('fc-not-allowed');
  }
  
  
  // Given a total available height to fill, have `els` (essentially child rows) expand to accomodate.
  // By default, all elements that are shorter than the recommended height are expanded uniformly, not considering
  // any other els that are already too tall. if `shouldRedistribute` is on, it considers these tall rows and
  // reduces the available height.
  function distributeHeight(els, availableHeight, shouldRedistribute) {
  
  	// *FLOORING NOTE*: we floor in certain places because zoom can give inaccurate floating-point dimensions,
  	// and it is better to be shorter than taller, to avoid creating unnecessary scrollbars.
  
  	var minOffset1 = Math.floor(availableHeight / els.length); // for non-last element
  	var minOffset2 = Math.floor(availableHeight - minOffset1 * (els.length - 1)); // for last element *FLOORING NOTE*
  	var flexEls = []; // elements that are allowed to expand. array of DOM nodes
  	var flexOffsets = []; // amount of vertical space it takes up
  	var flexHeights = []; // actual css height
  	var usedHeight = 0;
  
  	undistributeHeight(els); // give all elements their natural height
  
  	// find elements that are below the recommended height (expandable).
  	// important to query for heights in a single first pass (to avoid reflow oscillation).
  	els.each(function(i, el) {
  		var minOffset = i === els.length - 1 ? minOffset2 : minOffset1;
  		var naturalOffset = $(el).outerHeight(true);
  
  		if (naturalOffset < minOffset) {
  			flexEls.push(el);
  			flexOffsets.push(naturalOffset);
  			flexHeights.push($(el).height());
  		}
  		else {
  			// this element stretches past recommended height (non-expandable). mark the space as occupied.
  			usedHeight += naturalOffset;
  		}
  	});
  
  	// readjust the recommended height to only consider the height available to non-maxed-out rows.
  	if (shouldRedistribute) {
  		availableHeight -= usedHeight;
  		minOffset1 = Math.floor(availableHeight / flexEls.length);
  		minOffset2 = Math.floor(availableHeight - minOffset1 * (flexEls.length - 1)); // *FLOORING NOTE*
  	}
  
  	// assign heights to all expandable elements
  	$(flexEls).each(function(i, el) {
  		var minOffset = i === flexEls.length - 1 ? minOffset2 : minOffset1;
  		var naturalOffset = flexOffsets[i];
  		var naturalHeight = flexHeights[i];
  		var newHeight = minOffset - (naturalOffset - naturalHeight); // subtract the margin/padding
  
  		if (naturalOffset < minOffset) { // we check this again because redistribution might have changed things
  			$(el).height(newHeight);
  		}
  	});
  }
  
  
  // Undoes distrubuteHeight, restoring all els to their natural height
  function undistributeHeight(els) {
  	els.height('');
  }
  
  
  // Given `els`, a jQuery set of <td> cells, find the cell with the largest natural width and set the widths of all the
  // cells to be that width.
  // PREREQUISITE: if you want a cell to take up width, it needs to have a single inner element w/ display:inline
  function matchCellWidths(els) {
  	var maxInnerWidth = 0;
  
  	els.find('> *').each(function(i, innerEl) {
  		var innerWidth = $(innerEl).outerWidth();
  		if (innerWidth > maxInnerWidth) {
  			maxInnerWidth = innerWidth;
  		}
  	});
  
  	maxInnerWidth++; // sometimes not accurate of width the text needs to stay on one line. insurance
  
  	els.width(maxInnerWidth);
  
  	return maxInnerWidth;
  }
  
  
  // Given one element that resides inside another,
  // Subtracts the height of the inner element from the outer element.
  function subtractInnerElHeight(outerEl, innerEl) {
  	var both = outerEl.add(innerEl);
  	var diff;
  
  	// effin' IE8/9/10/11 sometimes returns 0 for dimensions. this weird hack was the only thing that worked
  	both.css({
  		position: 'relative', // cause a reflow, which will force fresh dimension recalculation
  		left: -1 // ensure reflow in case the el was already relative. negative is less likely to cause new scroll
  	});
  	diff = outerEl.outerHeight() - innerEl.outerHeight(); // grab the dimensions
  	both.css({ position: '', left: '' }); // undo hack
  
  	return diff;
  }
  
  
  /* Element Geom Utilities
  ----------------------------------------------------------------------------------------------------------------------*/
  
  FC.getOuterRect = getOuterRect;
  FC.getClientRect = getClientRect;
  FC.getContentRect = getContentRect;
  FC.getScrollbarWidths = getScrollbarWidths;
  
  
  // borrowed from https://github.com/jquery/jquery-ui/blob/1.11.0/ui/core.js#L51
  function getScrollParent(el) {
  	var position = el.css('position'),
  		scrollParent = el.parents().filter(function() {
  			var parent = $(this);
  			return (/(auto|scroll)/).test(
  				parent.css('overflow') + parent.css('overflow-y') + parent.css('overflow-x')
  			);
  		}).eq(0);
  
  	return position === 'fixed' || !scrollParent.length ? $(el[0].ownerDocument || document) : scrollParent;
  }
  
  
  // Queries the outer bounding area of a jQuery element.
  // Returns a rectangle with absolute coordinates: left, right (exclusive), top, bottom (exclusive).
  // Origin is optional.
  function getOuterRect(el, origin) {
  	var offset = el.offset();
  	var left = offset.left - (origin ? origin.left : 0);
  	var top = offset.top - (origin ? origin.top : 0);
  
  	return {
  		left: left,
  		right: left + el.outerWidth(),
  		top: top,
  		bottom: top + el.outerHeight()
  	};
  }
  
  
  // Queries the area within the margin/border/scrollbars of a jQuery element. Does not go within the padding.
  // Returns a rectangle with absolute coordinates: left, right (exclusive), top, bottom (exclusive).
  // Origin is optional.
  // NOTE: should use clientLeft/clientTop, but very unreliable cross-browser.
  function getClientRect(el, origin) {
  	var offset = el.offset();
  	var scrollbarWidths = getScrollbarWidths(el);
  	var left = offset.left + getCssFloat(el, 'border-left-width') + scrollbarWidths.left - (origin ? origin.left : 0);
  	var top = offset.top + getCssFloat(el, 'border-top-width') + scrollbarWidths.top - (origin ? origin.top : 0);
  
  	return {
  		left: left,
  		right: left + el[0].clientWidth, // clientWidth includes padding but NOT scrollbars
  		top: top,
  		bottom: top + el[0].clientHeight // clientHeight includes padding but NOT scrollbars
  	};
  }
  
  
  // Queries the area within the margin/border/padding of a jQuery element. Assumed not to have scrollbars.
  // Returns a rectangle with absolute coordinates: left, right (exclusive), top, bottom (exclusive).
  // Origin is optional.
  function getContentRect(el, origin) {
  	var offset = el.offset(); // just outside of border, margin not included
  	var left = offset.left + getCssFloat(el, 'border-left-width') + getCssFloat(el, 'padding-left') -
  		(origin ? origin.left : 0);
  	var top = offset.top + getCssFloat(el, 'border-top-width') + getCssFloat(el, 'padding-top') -
  		(origin ? origin.top : 0);
  
  	return {
  		left: left,
  		right: left + el.width(),
  		top: top,
  		bottom: top + el.height()
  	};
  }
  
  
  // Returns the computed left/right/top/bottom scrollbar widths for the given jQuery element.
  // NOTE: should use clientLeft/clientTop, but very unreliable cross-browser.
  function getScrollbarWidths(el) {
  	var leftRightWidth = el.innerWidth() - el[0].clientWidth; // the paddings cancel out, leaving the scrollbars
  	var widths = {
  		left: 0,
  		right: 0,
  		top: 0,
  		bottom: el.innerHeight() - el[0].clientHeight // the paddings cancel out, leaving the bottom scrollbar
  	};
  
  	if (getIsLeftRtlScrollbars() && el.css('direction') == 'rtl') { // is the scrollbar on the left side?
  		widths.left = leftRightWidth;
  	}
  	else {
  		widths.right = leftRightWidth;
  	}
  
  	return widths;
  }
  
  
  // Logic for determining if, when the element is right-to-left, the scrollbar appears on the left side
  
  var _isLeftRtlScrollbars = null;
  
  function getIsLeftRtlScrollbars() { // responsible for caching the computation
  	if (_isLeftRtlScrollbars === null) {
  		_isLeftRtlScrollbars = computeIsLeftRtlScrollbars();
  	}
  	return _isLeftRtlScrollbars;
  }
  
  function computeIsLeftRtlScrollbars() { // creates an offscreen test element, then removes it
  	var el = $('<div><div/></div>')
  		.css({
  			position: 'absolute',
  			top: -1000,
  			left: 0,
  			border: 0,
  			padding: 0,
  			overflow: 'scroll',
  			direction: 'rtl'
  		})
  		.appendTo('body');
  	var innerEl = el.children();
  	var res = innerEl.offset().left > el.offset().left; // is the inner div shifted to accommodate a left scrollbar?
  	el.remove();
  	return res;
  }
  
  
  // Retrieves a jQuery element's computed CSS value as a floating-point number.
  // If the queried value is non-numeric (ex: IE can return "medium" for border width), will just return zero.
  function getCssFloat(el, prop) {
  	return parseFloat(el.css(prop)) || 0;
  }
  
  
  /* Mouse / Touch Utilities
  ----------------------------------------------------------------------------------------------------------------------*/
  
  FC.preventDefault = preventDefault;
  
  
  // Returns a boolean whether this was a left mouse click and no ctrl key (which means right click on Mac)
  function isPrimaryMouseButton(ev) {
  	return ev.which == 1 && !ev.ctrlKey;
  }
  
  
  function getEvX(ev) {
  	if (ev.pageX !== undefined) {
  		return ev.pageX;
  	}
  	var touches = ev.originalEvent.touches;
  	if (touches) {
  		return touches[0].pageX;
  	}
  }
  
  
  function getEvY(ev) {
  	if (ev.pageY !== undefined) {
  		return ev.pageY;
  	}
  	var touches = ev.originalEvent.touches;
  	if (touches) {
  		return touches[0].pageY;
  	}
  }
  
  
  function getEvIsTouch(ev) {
  	return /^touch/.test(ev.type);
  }
  
  
  function preventSelection(el) {
  	el.addClass('fc-unselectable')
  		.on('selectstart', preventDefault);
  }
  
  
  // Stops a mouse/touch event from doing it's native browser action
  function preventDefault(ev) {
  	ev.preventDefault();
  }
  
  
  // attach a handler to get called when ANY scroll action happens on the page.
  // this was impossible to do with normal on/off because 'scroll' doesn't bubble.
  // http://stackoverflow.com/a/32954565/96342
  // returns `true` on success.
  function bindAnyScroll(handler) {
  	if (window.addEventListener) {
  		window.addEventListener('scroll', handler, true); // useCapture=true
  		return true;
  	}
  	return false;
  }
  
  
  // undoes bindAnyScroll. must pass in the original function.
  // returns `true` on success.
  function unbindAnyScroll(handler) {
  	if (window.removeEventListener) {
  		window.removeEventListener('scroll', handler, true); // useCapture=true
  		return true;
  	}
  	return false;
  }
  
  
  /* General Geometry Utils
  ----------------------------------------------------------------------------------------------------------------------*/
  
  FC.intersectRects = intersectRects;
  
  // Returns a new rectangle that is the intersection of the two rectangles. If they don't intersect, returns false
  function intersectRects(rect1, rect2) {
  	var res = {
  		left: Math.max(rect1.left, rect2.left),
  		right: Math.min(rect1.right, rect2.right),
  		top: Math.max(rect1.top, rect2.top),
  		bottom: Math.min(rect1.bottom, rect2.bottom)
  	};
  
  	if (res.left < res.right && res.top < res.bottom) {
  		return res;
  	}
  	return false;
  }
  
  
  // Returns a new point that will have been moved to reside within the given rectangle
  function constrainPoint(point, rect) {
  	return {
  		left: Math.min(Math.max(point.left, rect.left), rect.right),
  		top: Math.min(Math.max(point.top, rect.top), rect.bottom)
  	};
  }
  
  
  // Returns a point that is the center of the given rectangle
  function getRectCenter(rect) {
  	return {
  		left: (rect.left + rect.right) / 2,
  		top: (rect.top + rect.bottom) / 2
  	};
  }
  
  
  // Subtracts point2's coordinates from point1's coordinates, returning a delta
  function diffPoints(point1, point2) {
  	return {
  		left: point1.left - point2.left,
  		top: point1.top - point2.top
  	};
  }
  
  
  /* Object Ordering by Field
  ----------------------------------------------------------------------------------------------------------------------*/
  
  FC.parseFieldSpecs = parseFieldSpecs;
  FC.compareByFieldSpecs = compareByFieldSpecs;
  FC.compareByFieldSpec = compareByFieldSpec;
  FC.flexibleCompare = flexibleCompare;
  
  
  function parseFieldSpecs(input) {
  	var specs = [];
  	var tokens = [];
  	var i, token;
  
  	if (typeof input === 'string') {
  		tokens = input.split(/\s*,\s*/);
  	}
  	else if (typeof input === 'function') {
  		tokens = [ input ];
  	}
  	else if ($.isArray(input)) {
  		tokens = input;
  	}
  
  	for (i = 0; i < tokens.length; i++) {
  		token = tokens[i];
  
  		if (typeof token === 'string') {
  			specs.push(
  				token.charAt(0) == '-' ?
  					{ field: token.substring(1), order: -1 } :
  					{ field: token, order: 1 }
  			);
  		}
  		else if (typeof token === 'function') {
  			specs.push({ func: token });
  		}
  	}
  
  	return specs;
  }
  
  
  function compareByFieldSpecs(obj1, obj2, fieldSpecs) {
  	var i;
  	var cmp;
  
  	for (i = 0; i < fieldSpecs.length; i++) {
  		cmp = compareByFieldSpec(obj1, obj2, fieldSpecs[i]);
  		if (cmp) {
  			return cmp;
  		}
  	}
  
  	return 0;
  }
  
  
  function compareByFieldSpec(obj1, obj2, fieldSpec) {
  	if (fieldSpec.func) {
  		return fieldSpec.func(obj1, obj2);
  	}
  	return flexibleCompare(obj1[fieldSpec.field], obj2[fieldSpec.field]) *
  		(fieldSpec.order || 1);
  }
  
  
  function flexibleCompare(a, b) {
  	if (!a && !b) {
  		return 0;
  	}
  	if (b == null) {
  		return -1;
  	}
  	if (a == null) {
  		return 1;
  	}
  	if ($.type(a) === 'string' || $.type(b) === 'string') {
  		return String(a).localeCompare(String(b));
  	}
  	return a - b;
  }
  
  
  /* FullCalendar-specific Misc Utilities
  ----------------------------------------------------------------------------------------------------------------------*/
  
  
  // Computes the intersection of the two ranges. Will return fresh date clones in a range.
  // Returns undefined if no intersection.
  // Expects all dates to be normalized to the same timezone beforehand.
  // TODO: move to date section?
  function intersectRanges(subjectRange, constraintRange) {
  	var subjectStart = subjectRange.start;
  	var subjectEnd = subjectRange.end;
  	var constraintStart = constraintRange.start;
  	var constraintEnd = constraintRange.end;
  	var segStart, segEnd;
  	var isStart, isEnd;
  
  	if (subjectEnd > constraintStart && subjectStart < constraintEnd) { // in bounds at all?
  
  		if (subjectStart >= constraintStart) {
  			segStart = subjectStart.clone();
  			isStart = true;
  		}
  		else {
  			segStart = constraintStart.clone();
  			isStart =  false;
  		}
  
  		if (subjectEnd <= constraintEnd) {
  			segEnd = subjectEnd.clone();
  			isEnd = true;
  		}
  		else {
  			segEnd = constraintEnd.clone();
  			isEnd = false;
  		}
  
  		return {
  			start: segStart,
  			end: segEnd,
  			isStart: isStart,
  			isEnd: isEnd
  		};
  	}
  }
  
  
  /* Date Utilities
  ----------------------------------------------------------------------------------------------------------------------*/
  
  FC.computeIntervalUnit = computeIntervalUnit;
  FC.divideRangeByDuration = divideRangeByDuration;
  FC.divideDurationByDuration = divideDurationByDuration;
  FC.multiplyDuration = multiplyDuration;
  FC.durationHasTime = durationHasTime;
  
  var dayIDs = [ 'sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat' ];
  var intervalUnits = [ 'year', 'month', 'week', 'day', 'hour', 'minute', 'second', 'millisecond' ];
  
  
  // Diffs the two moments into a Duration where full-days are recorded first, then the remaining time.
  // Moments will have their timezones normalized.
  function diffDayTime(a, b) {
  	return moment.duration({
  		days: a.clone().stripTime().diff(b.clone().stripTime(), 'days'),
  		ms: a.time() - b.time() // time-of-day from day start. disregards timezone
  	});
  }
  
  
  // Diffs the two moments via their start-of-day (regardless of timezone). Produces whole-day durations.
  function diffDay(a, b) {
  	return moment.duration({
  		days: a.clone().stripTime().diff(b.clone().stripTime(), 'days')
  	});
  }
  
  
  // Diffs two moments, producing a duration, made of a whole-unit-increment of the given unit. Uses rounding.
  function diffByUnit(a, b, unit) {
  	return moment.duration(
  		Math.round(a.diff(b, unit, true)), // returnFloat=true
  		unit
  	);
  }
  
  
  // Computes the unit name of the largest whole-unit period of time.
  // For example, 48 hours will be "days" whereas 49 hours will be "hours".
  // Accepts start/end, a range object, or an original duration object.
  function computeIntervalUnit(start, end) {
  	var i, unit;
  	var val;
  
  	for (i = 0; i < intervalUnits.length; i++) {
  		unit = intervalUnits[i];
  		val = computeRangeAs(unit, start, end);
  
  		if (val >= 1 && isInt(val)) {
  			break;
  		}
  	}
  
  	return unit; // will be "milliseconds" if nothing else matches
  }
  
  
  // Computes the number of units (like "hours") in the given range.
  // Range can be a {start,end} object, separate start/end args, or a Duration.
  // Results are based on Moment's .as() and .diff() methods, so results can depend on internal handling
  // of month-diffing logic (which tends to vary from version to version).
  function computeRangeAs(unit, start, end) {
  
  	if (end != null) { // given start, end
  		return end.diff(start, unit, true);
  	}
  	else if (moment.isDuration(start)) { // given duration
  		return start.as(unit);
  	}
  	else { // given { start, end } range object
  		return start.end.diff(start.start, unit, true);
  	}
  }
  
  
  // Intelligently divides a range (specified by a start/end params) by a duration
  function divideRangeByDuration(start, end, dur) {
  	var months;
  
  	if (durationHasTime(dur)) {
  		return (end - start) / dur;
  	}
  	months = dur.asMonths();
  	if (Math.abs(months) >= 1 && isInt(months)) {
  		return end.diff(start, 'months', true) / months;
  	}
  	return end.diff(start, 'days', true) / dur.asDays();
  }
  
  
  // Intelligently divides one duration by another
  function divideDurationByDuration(dur1, dur2) {
  	var months1, months2;
  
  	if (durationHasTime(dur1) || durationHasTime(dur2)) {
  		return dur1 / dur2;
  	}
  	months1 = dur1.asMonths();
  	months2 = dur2.asMonths();
  	if (
  		Math.abs(months1) >= 1 && isInt(months1) &&
  		Math.abs(months2) >= 1 && isInt(months2)
  	) {
  		return months1 / months2;
  	}
  	return dur1.asDays() / dur2.asDays();
  }
  
  
  // Intelligently multiplies a duration by a number
  function multiplyDuration(dur, n) {
  	var months;
  
  	if (durationHasTime(dur)) {
  		return moment.duration(dur * n);
  	}
  	months = dur.asMonths();
  	if (Math.abs(months) >= 1 && isInt(months)) {
  		return moment.duration({ months: months * n });
  	}
  	return moment.duration({ days: dur.asDays() * n });
  }
  
  
  // Returns a boolean about whether the given duration has any time parts (hours/minutes/seconds/ms)
  function durationHasTime(dur) {
  	return Boolean(dur.hours() || dur.minutes() || dur.seconds() || dur.milliseconds());
  }
  
  
  function isNativeDate(input) {
  	return  Object.prototype.toString.call(input) === '[object Date]' || input instanceof Date;
  }
  
  
  // Returns a boolean about whether the given input is a time string, like "06:40:00" or "06:00"
  function isTimeString(str) {
  	return /^\d+\:\d+(?:\:\d+\.?(?:\d{3})?)?$/.test(str);
  }
  
  
  /* Logging and Debug
  ----------------------------------------------------------------------------------------------------------------------*/
  
  FC.log = function() {
  	var console = window.console;
  
  	if (console && console.log) {
  		return console.log.apply(console, arguments);
  	}
  };
  
  FC.warn = function() {
  	var console = window.console;
  
  	if (console && console.warn) {
  		return console.warn.apply(console, arguments);
  	}
  	else {
  		return FC.log.apply(FC, arguments);
  	}
  };
  
  
  /* General Utilities
  ----------------------------------------------------------------------------------------------------------------------*/
  
  var hasOwnPropMethod = {}.hasOwnProperty;
  
  
  // Merges an array of objects into a single object.
  // The second argument allows for an array of property names who's object values will be merged together.
  function mergeProps(propObjs, complexProps) {
  	var dest = {};
  	var i, name;
  	var complexObjs;
  	var j, val;
  	var props;
  
  	if (complexProps) {
  		for (i = 0; i < complexProps.length; i++) {
  			name = complexProps[i];
  			complexObjs = [];
  
  			// collect the trailing object values, stopping when a non-object is discovered
  			for (j = propObjs.length - 1; j >= 0; j--) {
  				val = propObjs[j][name];
  
  				if (typeof val === 'object') {
  					complexObjs.unshift(val);
  				}
  				else if (val !== undefined) {
  					dest[name] = val; // if there were no objects, this value will be used
  					break;
  				}
  			}
  
  			// if the trailing values were objects, use the merged value
  			if (complexObjs.length) {
  				dest[name] = mergeProps(complexObjs);
  			}
  		}
  	}
  
  	// copy values into the destination, going from last to first
  	for (i = propObjs.length - 1; i >= 0; i--) {
  		props = propObjs[i];
  
  		for (name in props) {
  			if (!(name in dest)) { // if already assigned by previous props or complex props, don't reassign
  				dest[name] = props[name];
  			}
  		}
  	}
  
  	return dest;
  }
  
  
  // Create an object that has the given prototype. Just like Object.create
  function createObject(proto) {
  	var f = function() {};
  	f.prototype = proto;
  	return new f();
  }
  
  
  function copyOwnProps(src, dest) {
  	for (var name in src) {
  		if (hasOwnProp(src, name)) {
  			dest[name] = src[name];
  		}
  	}
  }
  
  
  function hasOwnProp(obj, name) {
  	return hasOwnPropMethod.call(obj, name);
  }
  
  
  // Is the given value a non-object non-function value?
  function isAtomic(val) {
  	return /undefined|null|boolean|number|string/.test($.type(val));
  }
  
  
  function applyAll(functions, thisObj, args) {
  	if ($.isFunction(functions)) {
  		functions = [ functions ];
  	}
  	if (functions) {
  		var i;
  		var ret;
  		for (i=0; i<functions.length; i++) {
  			ret = functions[i].apply(thisObj, args) || ret;
  		}
  		return ret;
  	}
  }
  
  
  function firstDefined() {
  	for (var i=0; i<arguments.length; i++) {
  		if (arguments[i] !== undefined) {
  			return arguments[i];
  		}
  	}
  }
  
  
  function htmlEscape(s) {
  	return (s + '').replace(/&/g, '&amp;')
  		.replace(/</g, '&lt;')
  		.replace(/>/g, '&gt;')
  		.replace(/'/g, '&#039;')
  		.replace(/"/g, '&quot;')
  		.replace(/\n/g, '<br />');
  }
  
  
  function stripHtmlEntities(text) {
  	return text.replace(/&.*?;/g, '');
  }
  
  
  // Given a hash of CSS properties, returns a string of CSS.
  // Uses property names as-is (no camel-case conversion). Will not make statements for null/undefined values.
  function cssToStr(cssProps) {
  	var statements = [];
  
  	$.each(cssProps, function(name, val) {
  		if (val != null) {
  			statements.push(name + ':' + val);
  		}
  	});
  
  	return statements.join(';');
  }
  
  
  // Given an object hash of HTML attribute names to values,
  // generates a string that can be injected between < > in HTML
  function attrsToStr(attrs) {
  	var parts = [];
  
  	$.each(attrs, function(name, val) {
  		if (val != null) {
  			parts.push(name + '="' + htmlEscape(val) + '"');
  		}
  	});
  
  	return parts.join(' ');
  }
  
  
  function capitaliseFirstLetter(str) {
  	return str.charAt(0).toUpperCase() + str.slice(1);
  }
  
  
  function compareNumbers(a, b) { // for .sort()
  	return a - b;
  }
  
  
  function isInt(n) {
  	return n % 1 === 0;
  }
  
  
  // Returns a method bound to the given object context.
  // Just like one of the jQuery.proxy signatures, but without the undesired behavior of treating the same method with
  // different contexts as identical when binding/unbinding events.
  function proxy(obj, methodName) {
  	var method = obj[methodName];
  
  	return function() {
  		return method.apply(obj, arguments);
  	};
  }
  
  
  // Returns a function, that, as long as it continues to be invoked, will not
  // be triggered. The function will be called after it stops being called for
  // N milliseconds. If `immediate` is passed, trigger the function on the
  // leading edge, instead of the trailing.
  // https://github.com/jashkenas/underscore/blob/1.6.0/underscore.js#L714
  function debounce(func, wait, immediate) {
  	var timeout, args, context, timestamp, result;
  
  	var later = function() {
  		var last = +new Date() - timestamp;
  		if (last < wait) {
  			timeout = setTimeout(later, wait - last);
  		}
  		else {
  			timeout = null;
  			if (!immediate) {
  				result = func.apply(context, args);
  				context = args = null;
  			}
  		}
  	};
  
  	return function() {
  		context = this;
  		args = arguments;
  		timestamp = +new Date();
  		var callNow = immediate && !timeout;
  		if (!timeout) {
  			timeout = setTimeout(later, wait);
  		}
  		if (callNow) {
  			result = func.apply(context, args);
  			context = args = null;
  		}
  		return result;
  	};
  }
  
  
  // HACK around jQuery's now A+ promises: execute callback synchronously if already resolved.
  // thenFunc shouldn't accept args.
  // similar to whenResources in Scheduler plugin.
  function syncThen(promise, thenFunc) {
  	// not a promise, or an already-resolved promise?
  	if (!promise || !promise.then || promise.state() === 'resolved') {
  		return $.when(thenFunc()); // resolve immediately
  	}
  	else if (thenFunc) {
  		return promise.then(thenFunc);
  	}
  }
  
  ;;
  
  /*
  GENERAL NOTE on moments throughout the *entire rest* of the codebase:
  All moments are assumed to be ambiguously-zoned unless otherwise noted,
  with the NOTABLE EXCEOPTION of start/end dates that live on *Event Objects*.
  Ambiguously-TIMED moments are assumed to be ambiguously-zoned by nature.
  */
  
  var ambigDateOfMonthRegex = /^\s*\d{4}-\d\d$/;
  var ambigTimeOrZoneRegex =
  	/^\s*\d{4}-(?:(\d\d-\d\d)|(W\d\d$)|(W\d\d-\d)|(\d\d\d))((T| )(\d\d(:\d\d(:\d\d(\.\d+)?)?)?)?)?$/;
  var newMomentProto = moment.fn; // where we will attach our new methods
  var oldMomentProto = $.extend({}, newMomentProto); // copy of original moment methods
  
  // tell momentjs to transfer these properties upon clone
  var momentProperties = moment.momentProperties;
  momentProperties.push('_fullCalendar');
  momentProperties.push('_ambigTime');
  momentProperties.push('_ambigZone');
  
  
  // Creating
  // -------------------------------------------------------------------------------------------------
  
  // Creates a new moment, similar to the vanilla moment(...) constructor, but with
  // extra features (ambiguous time, enhanced formatting). When given an existing moment,
  // it will function as a clone (and retain the zone of the moment). Anything else will
  // result in a moment in the local zone.
  FC.moment = function() {
  	return makeMoment(arguments);
  };
  
  // Sames as FC.moment, but forces the resulting moment to be in the UTC timezone.
  FC.moment.utc = function() {
  	var mom = makeMoment(arguments, true);
  
  	// Force it into UTC because makeMoment doesn't guarantee it
  	// (if given a pre-existing moment for example)
  	if (mom.hasTime()) { // don't give ambiguously-timed moments a UTC zone
  		mom.utc();
  	}
  
  	return mom;
  };
  
  // Same as FC.moment, but when given an ISO8601 string, the timezone offset is preserved.
  // ISO8601 strings with no timezone offset will become ambiguously zoned.
  FC.moment.parseZone = function() {
  	return makeMoment(arguments, true, true);
  };
  
  // Builds an enhanced moment from args. When given an existing moment, it clones. When given a
  // native Date, or called with no arguments (the current time), the resulting moment will be local.
  // Anything else needs to be "parsed" (a string or an array), and will be affected by:
  //    parseAsUTC - if there is no zone information, should we parse the input in UTC?
  //    parseZone - if there is zone information, should we force the zone of the moment?
  function makeMoment(args, parseAsUTC, parseZone) {
  	var input = args[0];
  	var isSingleString = args.length == 1 && typeof input === 'string';
  	var isAmbigTime;
  	var isAmbigZone;
  	var ambigMatch;
  	var mom;
  
  	if (moment.isMoment(input) || isNativeDate(input) || input === undefined) {
  		mom = moment.apply(null, args);
  	}
  	else { // "parsing" is required
  		isAmbigTime = false;
  		isAmbigZone = false;
  
  		if (isSingleString) {
  			if (ambigDateOfMonthRegex.test(input)) {
  				// accept strings like '2014-05', but convert to the first of the month
  				input += '-01';
  				args = [ input ]; // for when we pass it on to moment's constructor
  				isAmbigTime = true;
  				isAmbigZone = true;
  			}
  			else if ((ambigMatch = ambigTimeOrZoneRegex.exec(input))) {
  				isAmbigTime = !ambigMatch[5]; // no time part?
  				isAmbigZone = true;
  			}
  		}
  		else if ($.isArray(input)) {
  			// arrays have no timezone information, so assume ambiguous zone
  			isAmbigZone = true;
  		}
  		// otherwise, probably a string with a format
  
  		if (parseAsUTC || isAmbigTime) {
  			mom = moment.utc.apply(moment, args);
  		}
  		else {
  			mom = moment.apply(null, args);
  		}
  
  		if (isAmbigTime) {
  			mom._ambigTime = true;
  			mom._ambigZone = true; // ambiguous time always means ambiguous zone
  		}
  		else if (parseZone) { // let's record the inputted zone somehow
  			if (isAmbigZone) {
  				mom._ambigZone = true;
  			}
  			else if (isSingleString) {
  				mom.utcOffset(input); // if not a valid zone, will assign UTC
  			}
  		}
  	}
  
  	mom._fullCalendar = true; // flag for extended functionality
  
  	return mom;
  }
  
  
  // Week Number
  // -------------------------------------------------------------------------------------------------
  
  
  // Returns the week number, considering the locale's custom week number calcuation
  // `weeks` is an alias for `week`
  newMomentProto.week = newMomentProto.weeks = function(input) {
  	var weekCalc = this._locale._fullCalendar_weekCalc;
  
  	if (input == null && typeof weekCalc === 'function') { // custom function only works for getter
  		return weekCalc(this);
  	}
  	else if (weekCalc === 'ISO') {
  		return oldMomentProto.isoWeek.apply(this, arguments); // ISO getter/setter
  	}
  
  	return oldMomentProto.week.apply(this, arguments); // local getter/setter
  };
  
  
  // Time-of-day
  // -------------------------------------------------------------------------------------------------
  
  // GETTER
  // Returns a Duration with the hours/minutes/seconds/ms values of the moment.
  // If the moment has an ambiguous time, a duration of 00:00 will be returned.
  //
  // SETTER
  // You can supply a Duration, a Moment, or a Duration-like argument.
  // When setting the time, and the moment has an ambiguous time, it then becomes unambiguous.
  newMomentProto.time = function(time) {
  
  	// Fallback to the original method (if there is one) if this moment wasn't created via FullCalendar.
  	// `time` is a generic enough method name where this precaution is necessary to avoid collisions w/ other plugins.
  	if (!this._fullCalendar) {
  		return oldMomentProto.time.apply(this, arguments);
  	}
  
  	if (time == null) { // getter
  		return moment.duration({
  			hours: this.hours(),
  			minutes: this.minutes(),
  			seconds: this.seconds(),
  			milliseconds: this.milliseconds()
  		});
  	}
  	else { // setter
  
  		this._ambigTime = false; // mark that the moment now has a time
  
  		if (!moment.isDuration(time) && !moment.isMoment(time)) {
  			time = moment.duration(time);
  		}
  
  		// The day value should cause overflow (so 24 hours becomes 00:00:00 of next day).
  		// Only for Duration times, not Moment times.
  		var dayHours = 0;
  		if (moment.isDuration(time)) {
  			dayHours = Math.floor(time.asDays()) * 24;
  		}
  
  		// We need to set the individual fields.
  		// Can't use startOf('day') then add duration. In case of DST at start of day.
  		return this.hours(dayHours + time.hours())
  			.minutes(time.minutes())
  			.seconds(time.seconds())
  			.milliseconds(time.milliseconds());
  	}
  };
  
  // Converts the moment to UTC, stripping out its time-of-day and timezone offset,
  // but preserving its YMD. A moment with a stripped time will display no time
  // nor timezone offset when .format() is called.
  newMomentProto.stripTime = function() {
  
  	if (!this._ambigTime) {
  
  		this.utc(true); // keepLocalTime=true (for keeping *date* value)
  
  		// set time to zero
  		this.set({
  			hours: 0,
  			minutes: 0,
  			seconds: 0,
  			ms: 0
  		});
  
  		// Mark the time as ambiguous. This needs to happen after the .utc() call, which might call .utcOffset(),
  		// which clears all ambig flags.
  		this._ambigTime = true;
  		this._ambigZone = true; // if ambiguous time, also ambiguous timezone offset
  	}
  
  	return this; // for chaining
  };
  
  // Returns if the moment has a non-ambiguous time (boolean)
  newMomentProto.hasTime = function() {
  	return !this._ambigTime;
  };
  
  
  // Timezone
  // -------------------------------------------------------------------------------------------------
  
  // Converts the moment to UTC, stripping out its timezone offset, but preserving its
  // YMD and time-of-day. A moment with a stripped timezone offset will display no
  // timezone offset when .format() is called.
  newMomentProto.stripZone = function() {
  	var wasAmbigTime;
  
  	if (!this._ambigZone) {
  
  		wasAmbigTime = this._ambigTime;
  
  		this.utc(true); // keepLocalTime=true (for keeping date and time values)
  
  		// the above call to .utc()/.utcOffset() unfortunately might clear the ambig flags, so restore
  		this._ambigTime = wasAmbigTime || false;
  
  		// Mark the zone as ambiguous. This needs to happen after the .utc() call, which might call .utcOffset(),
  		// which clears the ambig flags.
  		this._ambigZone = true;
  	}
  
  	return this; // for chaining
  };
  
  // Returns of the moment has a non-ambiguous timezone offset (boolean)
  newMomentProto.hasZone = function() {
  	return !this._ambigZone;
  };
  
  
  // implicitly marks a zone
  newMomentProto.local = function(keepLocalTime) {
  
  	// for when converting from ambiguously-zoned to local,
  	// keep the time values when converting from UTC -> local
  	oldMomentProto.local.call(this, this._ambigZone || keepLocalTime);
  
  	// ensure non-ambiguous
  	// this probably already happened via local() -> utcOffset(), but don't rely on Moment's internals
  	this._ambigTime = false;
  	this._ambigZone = false;
  
  	return this; // for chaining
  };
  
  
  // implicitly marks a zone
  newMomentProto.utc = function(keepLocalTime) {
  
  	oldMomentProto.utc.call(this, keepLocalTime);
  
  	// ensure non-ambiguous
  	// this probably already happened via utc() -> utcOffset(), but don't rely on Moment's internals
  	this._ambigTime = false;
  	this._ambigZone = false;
  
  	return this;
  };
  
  
  // implicitly marks a zone (will probably get called upon .utc() and .local())
  newMomentProto.utcOffset = function(tzo) {
  
  	if (tzo != null) { // setter
  		// these assignments needs to happen before the original zone method is called.
  		// I forget why, something to do with a browser crash.
  		this._ambigTime = false;
  		this._ambigZone = false;
  	}
  
  	return oldMomentProto.utcOffset.apply(this, arguments);
  };
  
  
  // Formatting
  // -------------------------------------------------------------------------------------------------
  
  newMomentProto.format = function() {
  	if (this._fullCalendar && arguments[0]) { // an enhanced moment? and a format string provided?
  		return formatDate(this, arguments[0]); // our extended formatting
  	}
  	if (this._ambigTime) {
  		return oldMomentFormat(this, 'YYYY-MM-DD');
  	}
  	if (this._ambigZone) {
  		return oldMomentFormat(this, 'YYYY-MM-DD[T]HH:mm:ss');
  	}
  	return oldMomentProto.format.apply(this, arguments);
  };
  
  newMomentProto.toISOString = function() {
  	if (this._ambigTime) {
  		return oldMomentFormat(this, 'YYYY-MM-DD');
  	}
  	if (this._ambigZone) {
  		return oldMomentFormat(this, 'YYYY-MM-DD[T]HH:mm:ss');
  	}
  	return oldMomentProto.toISOString.apply(this, arguments);
  };
  
  ;;
  
  // Single Date Formatting
  // -------------------------------------------------------------------------------------------------
  
  
  // call this if you want Moment's original format method to be used
  function oldMomentFormat(mom, formatStr) {
  	return oldMomentProto.format.call(mom, formatStr); // oldMomentProto defined in moment-ext.js
  }
  
  
  // Formats `date` with a Moment formatting string, but allow our non-zero areas and
  // additional token.
  function formatDate(date, formatStr) {
  	return formatDateWithChunks(date, getFormatStringChunks(formatStr));
  }
  
  
  function formatDateWithChunks(date, chunks) {
  	var s = '';
  	var i;
  
  	for (i=0; i<chunks.length; i++) {
  		s += formatDateWithChunk(date, chunks[i]);
  	}
  
  	return s;
  }
  
  
  // addition formatting tokens we want recognized
  var tokenOverrides = {
  	t: function(date) { // "a" or "p"
  		return oldMomentFormat(date, 'a').charAt(0);
  	},
  	T: function(date) { // "A" or "P"
  		return oldMomentFormat(date, 'A').charAt(0);
  	}
  };
  
  
  function formatDateWithChunk(date, chunk) {
  	var token;
  	var maybeStr;
  
  	if (typeof chunk === 'string') { // a literal string
  		return chunk;
  	}
  	else if ((token = chunk.token)) { // a token, like "YYYY"
  		if (tokenOverrides[token]) {
  			return tokenOverrides[token](date); // use our custom token
  		}
  		return oldMomentFormat(date, token);
  	}
  	else if (chunk.maybe) { // a grouping of other chunks that must be non-zero
  		maybeStr = formatDateWithChunks(date, chunk.maybe);
  		if (maybeStr.match(/[1-9]/)) {
  			return maybeStr;
  		}
  	}
  
  	return '';
  }
  
  
  // Date Range Formatting
  // -------------------------------------------------------------------------------------------------
  // TODO: make it work with timezone offset
  
  // Using a formatting string meant for a single date, generate a range string, like
  // "Sep 2 - 9 2013", that intelligently inserts a separator where the dates differ.
  // If the dates are the same as far as the format string is concerned, just return a single
  // rendering of one date, without any separator.
  function formatRange(date1, date2, formatStr, separator, isRTL) {
  	var localeData;
  
  	date1 = FC.moment.parseZone(date1);
  	date2 = FC.moment.parseZone(date2);
  
  	localeData = date1.localeData();
  
  	// Expand localized format strings, like "LL" -> "MMMM D YYYY"
  	formatStr = localeData.longDateFormat(formatStr) || formatStr;
  	// BTW, this is not important for `formatDate` because it is impossible to put custom tokens
  	// or non-zero areas in Moment's localized format strings.
  
  	separator = separator || ' - ';
  
  	return formatRangeWithChunks(
  		date1,
  		date2,
  		getFormatStringChunks(formatStr),
  		separator,
  		isRTL
  	);
  }
  FC.formatRange = formatRange; // expose
  
  
  function formatRangeWithChunks(date1, date2, chunks, separator, isRTL) {
  	var unzonedDate1 = date1.clone().stripZone(); // for formatSimilarChunk
  	var unzonedDate2 = date2.clone().stripZone(); // "
  	var chunkStr; // the rendering of the chunk
  	var leftI;
  	var leftStr = '';
  	var rightI;
  	var rightStr = '';
  	var middleI;
  	var middleStr1 = '';
  	var middleStr2 = '';
  	var middleStr = '';
  
  	// Start at the leftmost side of the formatting string and continue until you hit a token
  	// that is not the same between dates.
  	for (leftI=0; leftI<chunks.length; leftI++) {
  		chunkStr = formatSimilarChunk(date1, date2, unzonedDate1, unzonedDate2, chunks[leftI]);
  		if (chunkStr === false) {
  			break;
  		}
  		leftStr += chunkStr;
  	}
  
  	// Similarly, start at the rightmost side of the formatting string and move left
  	for (rightI=chunks.length-1; rightI>leftI; rightI--) {
  		chunkStr = formatSimilarChunk(date1, date2, unzonedDate1, unzonedDate2,  chunks[rightI]);
  		if (chunkStr === false) {
  			break;
  		}
  		rightStr = chunkStr + rightStr;
  	}
  
  	// The area in the middle is different for both of the dates.
  	// Collect them distinctly so we can jam them together later.
  	for (middleI=leftI; middleI<=rightI; middleI++) {
  		middleStr1 += formatDateWithChunk(date1, chunks[middleI]);
  		middleStr2 += formatDateWithChunk(date2, chunks[middleI]);
  	}
  
  	if (middleStr1 || middleStr2) {
  		if (isRTL) {
  			middleStr = middleStr2 + separator + middleStr1;
  		}
  		else {
  			middleStr = middleStr1 + separator + middleStr2;
  		}
  	}
  
  	return leftStr + middleStr + rightStr;
  }
  
  
  var similarUnitMap = {
  	Y: 'year',
  	M: 'month',
  	D: 'day', // day of month
  	d: 'day', // day of week
  	// prevents a separator between anything time-related...
  	A: 'second', // AM/PM
  	a: 'second', // am/pm
  	T: 'second', // A/P
  	t: 'second', // a/p
  	H: 'second', // hour (24)
  	h: 'second', // hour (12)
  	m: 'second', // minute
  	s: 'second' // second
  };
  // TODO: week maybe?
  
  
  // Given a formatting chunk, and given that both dates are similar in the regard the
  // formatting chunk is concerned, format date1 against `chunk`. Otherwise, return `false`.
  function formatSimilarChunk(date1, date2, unzonedDate1, unzonedDate2, chunk) {
  	var token;
  	var unit;
  
  	if (typeof chunk === 'string') { // a literal string
  		return chunk;
  	}
  	else if ((token = chunk.token)) {
  		unit = similarUnitMap[token.charAt(0)];
  
  		// are the dates the same for this unit of measurement?
  		// use the unzoned dates for this calculation because unreliable when near DST (bug #2396)
  		if (unit && unzonedDate1.isSame(unzonedDate2, unit)) {
  			return oldMomentFormat(date1, token); // would be the same if we used `date2`
  			// BTW, don't support custom tokens
  		}
  	}
  
  	return false; // the chunk is NOT the same for the two dates
  	// BTW, don't support splitting on non-zero areas
  }
  
  
  // Chunking Utils
  // -------------------------------------------------------------------------------------------------
  
  
  var formatStringChunkCache = {};
  
  
  function getFormatStringChunks(formatStr) {
  	if (formatStr in formatStringChunkCache) {
  		return formatStringChunkCache[formatStr];
  	}
  	return (formatStringChunkCache[formatStr] = chunkFormatString(formatStr));
  }
  
  
  // Break the formatting string into an array of chunks
  function chunkFormatString(formatStr) {
  	var chunks = [];
  	var chunker = /\[([^\]]*)\]|\(([^\)]*)\)|(LTS|LT|(\w)\4*o?)|([^\w\[\(]+)/g; // TODO: more descrimination
  	var match;
  
  	while ((match = chunker.exec(formatStr))) {
  		if (match[1]) { // a literal string inside [ ... ]
  			chunks.push(match[1]);
  		}
  		else if (match[2]) { // non-zero formatting inside ( ... )
  			chunks.push({ maybe: chunkFormatString(match[2]) });
  		}
  		else if (match[3]) { // a formatting token
  			chunks.push({ token: match[3] });
  		}
  		else if (match[5]) { // an unenclosed literal string
  			chunks.push(match[5]);
  		}
  	}
  
  	return chunks;
  }
  
  
  // Misc Utils
  // -------------------------------------------------------------------------------------------------
  
  
  // granularity only goes up until day
  // TODO: unify with similarUnitMap
  var tokenGranularities = {
  	Y: { value: 1, unit: 'year' },
  	M: { value: 2, unit: 'month' },
  	W: { value: 3, unit: 'week' },
  	w: { value: 3, unit: 'week' },
  	D: { value: 4, unit: 'day' }, // day of month
  	d: { value: 4, unit: 'day' } // day of week
  };
  
  // returns a unit string, either 'year', 'month', 'day', or null
  // for the most granular formatting token in the string.
  FC.queryMostGranularFormatUnit = function(formatStr) {
  	var chunks = getFormatStringChunks(formatStr);
  	var i, chunk;
  	var candidate;
  	var best;
  
  	for (i = 0; i < chunks.length; i++) {
  		chunk = chunks[i];
  		if (chunk.token) {
  			candidate = tokenGranularities[chunk.token.charAt(0)];
  			if (candidate) {
  				if (!best || candidate.value > best.value) {
  					best = candidate;
  				}
  			}
  		}
  	}
  
  	if (best) {
  		return best.unit;
  	}
  
  	return null;
  };
  
  ;;
  
  FC.Class = Class; // export
  
  // Class that all other classes will inherit from
  function Class() { }
  
  
  // Called on a class to create a subclass.
  // Last argument contains instance methods. Any argument before the last are considered mixins.
  Class.extend = function() {
  	var len = arguments.length;
  	var i;
  	var members;
  
  	for (i = 0; i < len; i++) {
  		members = arguments[i];
  		if (i < len - 1) { // not the last argument?
  			mixIntoClass(this, members);
  		}
  	}
  
  	return extendClass(this, members || {}); // members will be undefined if no arguments
  };
  
  
  // Adds new member variables/methods to the class's prototype.
  // Can be called with another class, or a plain object hash containing new members.
  Class.mixin = function(members) {
  	mixIntoClass(this, members);
  };
  
  
  function extendClass(superClass, members) {
  	var subClass;
  
  	// ensure a constructor for the subclass, forwarding all arguments to the super-constructor if it doesn't exist
  	if (hasOwnProp(members, 'constructor')) {
  		subClass = members.constructor;
  	}
  	if (typeof subClass !== 'function') {
  		subClass = members.constructor = function() {
  			superClass.apply(this, arguments);
  		};
  	}
  
  	// build the base prototype for the subclass, which is an new object chained to the superclass's prototype
  	subClass.prototype = createObject(superClass.prototype);
  
  	// copy each member variable/method onto the the subclass's prototype
  	copyOwnProps(members, subClass.prototype);
  
  	// copy over all class variables/methods to the subclass, such as `extend` and `mixin`
  	copyOwnProps(superClass, subClass);
  
  	return subClass;
  }
  
  
  function mixIntoClass(theClass, members) {
  	copyOwnProps(members, theClass.prototype);
  }
  ;;
  
  var EmitterMixin = FC.EmitterMixin = {
  
  	// jQuery-ification via $(this) allows a non-DOM object to have
  	// the same event handling capabilities (including namespaces).
  
  
  	on: function(types, handler) {
  
  		// handlers are always called with an "event" object as their first param.
  		// sneak the `this` context and arguments into the extra parameter object
  		// and forward them on to the original handler.
  		var intercept = function(ev, extra) {
  			return handler.apply(
  				extra.context || this,
  				extra.args || []
  			);
  		};
  
  		// mimick jQuery's internal "proxy" system (risky, I know)
  		// causing all functions with the same .guid to appear to be the same.
  		// https://github.com/jquery/jquery/blob/2.2.4/src/core.js#L448
  		// this is needed for calling .off with the original non-intercept handler.
  		if (!handler.guid) {
  			handler.guid = $.guid++;
  		}
  		intercept.guid = handler.guid;
  
  		$(this).on(types, intercept);
  
  		return this; // for chaining
  	},
  
  
  	off: function(types, handler) {
  		$(this).off(types, handler);
  
  		return this; // for chaining
  	},
  
  
  	trigger: function(types) {
  		var args = Array.prototype.slice.call(arguments, 1); // arguments after the first
  
  		// pass in "extra" info to the intercept
  		$(this).triggerHandler(types, { args: args });
  
  		return this; // for chaining
  	},
  
  
  	triggerWith: function(types, context, args) {
  
  		// `triggerHandler` is less reliant on the DOM compared to `trigger`.
  		// pass in "extra" info to the intercept.
  		$(this).triggerHandler(types, { context: context, args: args });
  
  		return this; // for chaining
  	}
  
  };
  
  ;;
  
  /*
  Utility methods for easily listening to events on another object,
  and more importantly, easily unlistening from them.
  */
  var ListenerMixin = FC.ListenerMixin = (function() {
  	var guid = 0;
  	var ListenerMixin = {
  
  		listenerId: null,
  
  		/*
  		Given an `other` object that has on/off methods, bind the given `callback` to an event by the given name.
  		The `callback` will be called with the `this` context of the object that .listenTo is being called on.
  		Can be called:
  			.listenTo(other, eventName, callback)
  		OR
  			.listenTo(other, {
  				eventName1: callback1,
  				eventName2: callback2
  			})
  		*/
  		listenTo: function(other, arg, callback) {
  			if (typeof arg === 'object') { // given dictionary of callbacks
  				for (var eventName in arg) {
  					if (arg.hasOwnProperty(eventName)) {
  						this.listenTo(other, eventName, arg[eventName]);
  					}
  				}
  			}
  			else if (typeof arg === 'string') {
  				other.on(
  					arg + '.' + this.getListenerNamespace(), // use event namespacing to identify this object
  					$.proxy(callback, this) // always use `this` context
  						// the usually-undesired jQuery guid behavior doesn't matter,
  						// because we always unbind via namespace
  				);
  			}
  		},
  
  		/*
  		Causes the current object to stop listening to events on the `other` object.
  		`eventName` is optional. If omitted, will stop listening to ALL events on `other`.
  		*/
  		stopListeningTo: function(other, eventName) {
  			other.off((eventName || '') + '.' + this.getListenerNamespace());
  		},
  
  		/*
  		Returns a string, unique to this object, to be used for event namespacing
  		*/
  		getListenerNamespace: function() {
  			if (this.listenerId == null) {
  				this.listenerId = guid++;
  			}
  			return '_listener' + this.listenerId;
  		}
  
  	};
  	return ListenerMixin;
  })();
  ;;
  
  // simple class for toggle a `isIgnoringMouse` flag on delay
  // initMouseIgnoring must first be called, with a millisecond delay setting.
  var MouseIgnorerMixin = {
  
  	isIgnoringMouse: false, // bool
  	delayUnignoreMouse: null, // method
  
  
  	initMouseIgnoring: function(delay) {
  		this.delayUnignoreMouse = debounce(proxy(this, 'unignoreMouse'), delay || 1000);
  	},
  
  
  	// temporarily ignore mouse actions on segments
  	tempIgnoreMouse: function() {
  		this.isIgnoringMouse = true;
  		this.delayUnignoreMouse();
  	},
  
  
  	// delayUnignoreMouse eventually calls this
  	unignoreMouse: function() {
  		this.isIgnoringMouse = false;
  	}
  
  };
  
  ;;
  
  /* A rectangular panel that is absolutely positioned over other content
  ------------------------------------------------------------------------------------------------------------------------
  Options:
  	- className (string)
  	- content (HTML string or jQuery element set)
  	- parentEl
  	- top
  	- left
  	- right (the x coord of where the right edge should be. not a "CSS" right)
  	- autoHide (boolean)
  	- show (callback)
  	- hide (callback)
  */
  
  var Popover = Class.extend(ListenerMixin, {
  
  	isHidden: true,
  	options: null,
  	el: null, // the container element for the popover. generated by this object
  	margin: 10, // the space required between the popover and the edges of the scroll container
  
  
  	constructor: function(options) {
  		this.options = options || {};
  	},
  
  
  	// Shows the popover on the specified position. Renders it if not already
  	show: function() {
  		if (this.isHidden) {
  			if (!this.el) {
  				this.render();
  			}
  			this.el.show();
  			this.position();
  			this.isHidden = false;
  			this.trigger('show');
  		}
  	},
  
  
  	// Hides the popover, through CSS, but does not remove it from the DOM
  	hide: function() {
  		if (!this.isHidden) {
  			this.el.hide();
  			this.isHidden = true;
  			this.trigger('hide');
  		}
  	},
  
  
  	// Creates `this.el` and renders content inside of it
  	render: function() {
  		var _this = this;
  		var options = this.options;
  
  		this.el = $('<div class="fc-popover"/>')
  			.addClass(options.className || '')
  			.css({
  				// position initially to the top left to avoid creating scrollbars
  				top: 0,
  				left: 0
  			})
  			.append(options.content)
  			.appendTo(options.parentEl);
  
  		// when a click happens on anything inside with a 'fc-close' className, hide the popover
  		this.el.on('click', '.fc-close', function() {
  			_this.hide();
  		});
  
  		if (options.autoHide) {
  			this.listenTo($(document), 'mousedown', this.documentMousedown);
  		}
  	},
  
  
  	// Triggered when the user clicks *anywhere* in the document, for the autoHide feature
  	documentMousedown: function(ev) {
  		// only hide the popover if the click happened outside the popover
  		if (this.el && !$(ev.target).closest(this.el).length) {
  			this.hide();
  		}
  	},
  
  
  	// Hides and unregisters any handlers
  	removeElement: function() {
  		this.hide();
  
  		if (this.el) {
  			this.el.remove();
  			this.el = null;
  		}
  
  		this.stopListeningTo($(document), 'mousedown');
  	},
  
  
  	// Positions the popover optimally, using the top/left/right options
  	position: function() {
  		var options = this.options;
  		var origin = this.el.offsetParent().offset();
  		var width = this.el.outerWidth();
  		var height = this.el.outerHeight();
  		var windowEl = $(window);
  		var viewportEl = getScrollParent(this.el);
  		var viewportTop;
  		var viewportLeft;
  		var viewportOffset;
  		var top; // the "position" (not "offset") values for the popover
  		var left; //
  
  		// compute top and left
  		top = options.top || 0;
  		if (options.left !== undefined) {
  			left = options.left;
  		}
  		else if (options.right !== undefined) {
  			left = options.right - width; // derive the left value from the right value
  		}
  		else {
  			left = 0;
  		}
  
  		if (viewportEl.is(window) || viewportEl.is(document)) { // normalize getScrollParent's result
  			viewportEl = windowEl;
  			viewportTop = 0; // the window is always at the top left
  			viewportLeft = 0; // (and .offset() won't work if called here)
  		}
  		else {
  			viewportOffset = viewportEl.offset();
  			viewportTop = viewportOffset.top;
  			viewportLeft = viewportOffset.left;
  		}
  
  		// if the window is scrolled, it causes the visible area to be further down
  		viewportTop += windowEl.scrollTop();
  		viewportLeft += windowEl.scrollLeft();
  
  		// constrain to the view port. if constrained by two edges, give precedence to top/left
  		if (options.viewportConstrain !== false) {
  			top = Math.min(top, viewportTop + viewportEl.outerHeight() - height - this.margin);
  			top = Math.max(top, viewportTop + this.margin);
  			left = Math.min(left, viewportLeft + viewportEl.outerWidth() - width - this.margin);
  			left = Math.max(left, viewportLeft + this.margin);
  		}
  
  		this.el.css({
  			top: top - origin.top,
  			left: left - origin.left
  		});
  	},
  
  
  	// Triggers a callback. Calls a function in the option hash of the same name.
  	// Arguments beyond the first `name` are forwarded on.
  	// TODO: better code reuse for this. Repeat code
  	trigger: function(name) {
  		if (this.options[name]) {
  			this.options[name].apply(this, Array.prototype.slice.call(arguments, 1));
  		}
  	}
  
  });
  
  ;;
  
  /*
  A cache for the left/right/top/bottom/width/height values for one or more elements.
  Works with both offset (from topleft document) and position (from offsetParent).
  
  options:
  - els
  - isHorizontal
  - isVertical
  */
  var CoordCache = FC.CoordCache = Class.extend({
  
  	els: null, // jQuery set (assumed to be siblings)
  	forcedOffsetParentEl: null, // options can override the natural offsetParent
  	origin: null, // {left,top} position of offsetParent of els
  	boundingRect: null, // constrain cordinates to this rectangle. {left,right,top,bottom} or null
  	isHorizontal: false, // whether to query for left/right/width
  	isVertical: false, // whether to query for top/bottom/height
  
  	// arrays of coordinates (offsets from topleft of document)
  	lefts: null,
  	rights: null,
  	tops: null,
  	bottoms: null,
  
  
  	constructor: function(options) {
  		this.els = $(options.els);
  		this.isHorizontal = options.isHorizontal;
  		this.isVertical = options.isVertical;
  		this.forcedOffsetParentEl = options.offsetParent ? $(options.offsetParent) : null;
  	},
  
  
  	// Queries the els for coordinates and stores them.
  	// Call this method before using and of the get* methods below.
  	build: function() {
  		var offsetParentEl = this.forcedOffsetParentEl || this.els.eq(0).offsetParent();
  
  		this.origin = offsetParentEl.offset();
  		this.boundingRect = this.queryBoundingRect();
  
  		if (this.isHorizontal) {
  			this.buildElHorizontals();
  		}
  		if (this.isVertical) {
  			this.buildElVerticals();
  		}
  	},
  
  
  	// Destroys all internal data about coordinates, freeing memory
  	clear: function() {
  		this.origin = null;
  		this.boundingRect = null;
  		this.lefts = null;
  		this.rights = null;
  		this.tops = null;
  		this.bottoms = null;
  	},
  
  
  	// When called, if coord caches aren't built, builds them
  	ensureBuilt: function() {
  		if (!this.origin) {
  			this.build();
  		}
  	},
  
  
  	// Populates the left/right internal coordinate arrays
  	buildElHorizontals: function() {
  		var lefts = [];
  		var rights = [];
  
  		this.els.each(function(i, node) {
  			var el = $(node);
  			var left = el.offset().left;
  			var width = el.outerWidth();
  
  			lefts.push(left);
  			rights.push(left + width);
  		});
  
  		this.lefts = lefts;
  		this.rights = rights;
  	},
  
  
  	// Populates the top/bottom internal coordinate arrays
  	buildElVerticals: function() {
  		var tops = [];
  		var bottoms = [];
  
  		this.els.each(function(i, node) {
  			var el = $(node);
  			var top = el.offset().top;
  			var height = el.outerHeight();
  
  			tops.push(top);
  			bottoms.push(top + height);
  		});
  
  		this.tops = tops;
  		this.bottoms = bottoms;
  	},
  
  
  	// Given a left offset (from document left), returns the index of the el that it horizontally intersects.
  	// If no intersection is made, returns undefined.
  	getHorizontalIndex: function(leftOffset) {
  		this.ensureBuilt();
  
  		var lefts = this.lefts;
  		var rights = this.rights;
  		var len = lefts.length;
  		var i;
  
  		for (i = 0; i < len; i++) {
  			if (leftOffset >= lefts[i] && leftOffset < rights[i]) {
  				return i;
  			}
  		}
  	},
  
  
  	// Given a top offset (from document top), returns the index of the el that it vertically intersects.
  	// If no intersection is made, returns undefined.
  	getVerticalIndex: function(topOffset) {
  		this.ensureBuilt();
  
  		var tops = this.tops;
  		var bottoms = this.bottoms;
  		var len = tops.length;
  		var i;
  
  		for (i = 0; i < len; i++) {
  			if (topOffset >= tops[i] && topOffset < bottoms[i]) {
  				return i;
  			}
  		}
  	},
  
  
  	// Gets the left offset (from document left) of the element at the given index
  	getLeftOffset: function(leftIndex) {
  		this.ensureBuilt();
  		return this.lefts[leftIndex];
  	},
  
  
  	// Gets the left position (from offsetParent left) of the element at the given index
  	getLeftPosition: function(leftIndex) {
  		this.ensureBuilt();
  		return this.lefts[leftIndex] - this.origin.left;
  	},
  
  
  	// Gets the right offset (from document left) of the element at the given index.
  	// This value is NOT relative to the document's right edge, like the CSS concept of "right" would be.
  	getRightOffset: function(leftIndex) {
  		this.ensureBuilt();
  		return this.rights[leftIndex];
  	},
  
  
  	// Gets the right position (from offsetParent left) of the element at the given index.
  	// This value is NOT relative to the offsetParent's right edge, like the CSS concept of "right" would be.
  	getRightPosition: function(leftIndex) {
  		this.ensureBuilt();
  		return this.rights[leftIndex] - this.origin.left;
  	},
  
  
  	// Gets the width of the element at the given index
  	getWidth: function(leftIndex) {
  		this.ensureBuilt();
  		return this.rights[leftIndex] - this.lefts[leftIndex];
  	},
  
  
  	// Gets the top offset (from document top) of the element at the given index
  	getTopOffset: function(topIndex) {
  		this.ensureBuilt();
  		return this.tops[topIndex];
  	},
  
  
  	// Gets the top position (from offsetParent top) of the element at the given position
  	getTopPosition: function(topIndex) {
  		this.ensureBuilt();
  		return this.tops[topIndex] - this.origin.top;
  	},
  
  	// Gets the bottom offset (from the document top) of the element at the given index.
  	// This value is NOT relative to the offsetParent's bottom edge, like the CSS concept of "bottom" would be.
  	getBottomOffset: function(topIndex) {
  		this.ensureBuilt();
  		return this.bottoms[topIndex];
  	},
  
  
  	// Gets the bottom position (from the offsetParent top) of the element at the given index.
  	// This value is NOT relative to the offsetParent's bottom edge, like the CSS concept of "bottom" would be.
  	getBottomPosition: function(topIndex) {
  		this.ensureBuilt();
  		return this.bottoms[topIndex] - this.origin.top;
  	},
  
  
  	// Gets the height of the element at the given index
  	getHeight: function(topIndex) {
  		this.ensureBuilt();
  		return this.bottoms[topIndex] - this.tops[topIndex];
  	},
  
  
  	// Bounding Rect
  	// TODO: decouple this from CoordCache
  
  	// Compute and return what the elements' bounding rectangle is, from the user's perspective.
  	// Right now, only returns a rectangle if constrained by an overflow:scroll element.
  	queryBoundingRect: function() {
  		var scrollParentEl = getScrollParent(this.els.eq(0));
  
  		if (!scrollParentEl.is(document)) {
  			return getClientRect(scrollParentEl);
  		}
  	},
  
  	isPointInBounds: function(leftOffset, topOffset) {
  		return this.isLeftInBounds(leftOffset) && this.isTopInBounds(topOffset);
  	},
  
  	isLeftInBounds: function(leftOffset) {
  		return !this.boundingRect || (leftOffset >= this.boundingRect.left && leftOffset < this.boundingRect.right);
  	},
  
  	isTopInBounds: function(topOffset) {
  		return !this.boundingRect || (topOffset >= this.boundingRect.top && topOffset < this.boundingRect.bottom);
  	}
  
  });
  
  ;;
  
  /* Tracks a drag's mouse movement, firing various handlers
  ----------------------------------------------------------------------------------------------------------------------*/
  // TODO: use Emitter
  
  var DragListener = FC.DragListener = Class.extend(ListenerMixin, MouseIgnorerMixin, {
  
  	options: null,
  	subjectEl: null,
  
  	// coordinates of the initial mousedown
  	originX: null,
  	originY: null,
  
  	// the wrapping element that scrolls, or MIGHT scroll if there's overflow.
  	// TODO: do this for wrappers that have overflow:hidden as well.
  	scrollEl: null,
  
  	isInteracting: false,
  	isDistanceSurpassed: false,
  	isDelayEnded: false,
  	isDragging: false,
  	isTouch: false,
  
  	delay: null,
  	delayTimeoutId: null,
  	minDistance: null,
  
  	handleTouchScrollProxy: null, // calls handleTouchScroll, always bound to `this`
  
  
  	constructor: function(options) {
  		this.options = options || {};
  		this.handleTouchScrollProxy = proxy(this, 'handleTouchScroll');
  		this.initMouseIgnoring(500);
  	},
  
  
  	// Interaction (high-level)
  	// -----------------------------------------------------------------------------------------------------------------
  
  
  	startInteraction: function(ev, extraOptions) {
  		var isTouch = getEvIsTouch(ev);
  
  		if (ev.type === 'mousedown') {
  			if (this.isIgnoringMouse) {
  				return;
  			}
  			else if (!isPrimaryMouseButton(ev)) {
  				return;
  			}
  			else {
  				ev.preventDefault(); // prevents native selection in most browsers
  			}
  		}
  
  		if (!this.isInteracting) {
  
  			// process options
  			extraOptions = extraOptions || {};
  			this.delay = firstDefined(extraOptions.delay, this.options.delay, 0);
  			this.minDistance = firstDefined(extraOptions.distance, this.options.distance, 0);
  			this.subjectEl = this.options.subjectEl;
  
  			this.isInteracting = true;
  			this.isTouch = isTouch;
  			this.isDelayEnded = false;
  			this.isDistanceSurpassed = false;
  
  			this.originX = getEvX(ev);
  			this.originY = getEvY(ev);
  			this.scrollEl = getScrollParent($(ev.target));
  
  			this.bindHandlers();
  			this.initAutoScroll();
  			this.handleInteractionStart(ev);
  			this.startDelay(ev);
  
  			if (!this.minDistance) {
  				this.handleDistanceSurpassed(ev);
  			}
  		}
  	},
  
  
  	handleInteractionStart: function(ev) {
  		this.trigger('interactionStart', ev);
  	},
  
  
  	endInteraction: function(ev, isCancelled) {
  		if (this.isInteracting) {
  			this.endDrag(ev);
  
  			if (this.delayTimeoutId) {
  				clearTimeout(this.delayTimeoutId);
  				this.delayTimeoutId = null;
  			}
  
  			this.destroyAutoScroll();
  			this.unbindHandlers();
  
  			this.isInteracting = false;
  			this.handleInteractionEnd(ev, isCancelled);
  
  			// a touchstart+touchend on the same element will result in the following addition simulated events:
  			// mouseover + mouseout + click
  			// let's ignore these bogus events
  			if (this.isTouch) {
  				this.tempIgnoreMouse();
  			}
  		}
  	},
  
  
  	handleInteractionEnd: function(ev, isCancelled) {
  		this.trigger('interactionEnd', ev, isCancelled || false);
  	},
  
  
  	// Binding To DOM
  	// -----------------------------------------------------------------------------------------------------------------
  
  
  	bindHandlers: function() {
  		var _this = this;
  		var touchStartIgnores = 1;
  
  		if (this.isTouch) {
  			this.listenTo($(document), {
  				touchmove: this.handleTouchMove,
  				touchend: this.endInteraction,
  				touchcancel: this.endInteraction,
  
  				// Sometimes touchend doesn't fire
  				// (can't figure out why. touchcancel doesn't fire either. has to do with scrolling?)
  				// If another touchstart happens, we know it's bogus, so cancel the drag.
  				// touchend will continue to be broken until user does a shorttap/scroll, but this is best we can do.
  				touchstart: function(ev) {
  					if (touchStartIgnores) { // bindHandlers is called from within a touchstart,
  						touchStartIgnores--; // and we don't want this to fire immediately, so ignore.
  					}
  					else {
  						_this.endInteraction(ev, true); // isCancelled=true
  					}
  				}
  			});
  
  			// listen to ALL scroll actions on the page
  			if (
  				!bindAnyScroll(this.handleTouchScrollProxy) && // hopefully this works and short-circuits the rest
  				this.scrollEl // otherwise, attach a single handler to this
  			) {
  				this.listenTo(this.scrollEl, 'scroll', this.handleTouchScroll);
  			}
  		}
  		else {
  			this.listenTo($(document), {
  				mousemove: this.handleMouseMove,
  				mouseup: this.endInteraction
  			});
  		}
  
  		this.listenTo($(document), {
  			selectstart: preventDefault, // don't allow selection while dragging
  			contextmenu: preventDefault // long taps would open menu on Chrome dev tools
  		});
  	},
  
  
  	unbindHandlers: function() {
  		this.stopListeningTo($(document));
  
  		// unbind scroll listening
  		unbindAnyScroll(this.handleTouchScrollProxy);
  		if (this.scrollEl) {
  			this.stopListeningTo(this.scrollEl, 'scroll');
  		}
  	},
  
  
  	// Drag (high-level)
  	// -----------------------------------------------------------------------------------------------------------------
  
  
  	// extraOptions ignored if drag already started
  	startDrag: function(ev, extraOptions) {
  		this.startInteraction(ev, extraOptions); // ensure interaction began
  
  		if (!this.isDragging) {
  			this.isDragging = true;
  			this.handleDragStart(ev);
  		}
  	},
  
  
  	handleDragStart: function(ev) {
  		this.trigger('dragStart', ev);
  	},
  
  
  	handleMove: function(ev) {
  		var dx = getEvX(ev) - this.originX;
  		var dy = getEvY(ev) - this.originY;
  		var minDistance = this.minDistance;
  		var distanceSq; // current distance from the origin, squared
  
  		if (!this.isDistanceSurpassed) {
  			distanceSq = dx * dx + dy * dy;
  			if (distanceSq >= minDistance * minDistance) { // use pythagorean theorem
  				this.handleDistanceSurpassed(ev);
  			}
  		}
  
  		if (this.isDragging) {
  			this.handleDrag(dx, dy, ev);
  		}
  	},
  
  
  	// Called while the mouse is being moved and when we know a legitimate drag is taking place
  	handleDrag: function(dx, dy, ev) {
  		this.trigger('drag', dx, dy, ev);
  		this.updateAutoScroll(ev); // will possibly cause scrolling
  	},
  
  
  	endDrag: function(ev) {
  		if (this.isDragging) {
  			this.isDragging = false;
  			this.handleDragEnd(ev);
  		}
  	},
  
  
  	handleDragEnd: function(ev) {
  		this.trigger('dragEnd', ev);
  	},
  
  
  	// Delay
  	// -----------------------------------------------------------------------------------------------------------------
  
  
  	startDelay: function(initialEv) {
  		var _this = this;
  
  		if (this.delay) {
  			this.delayTimeoutId = setTimeout(function() {
  				_this.handleDelayEnd(initialEv);
  			}, this.delay);
  		}
  		else {
  			this.handleDelayEnd(initialEv);
  		}
  	},
  
  
  	handleDelayEnd: function(initialEv) {
  		this.isDelayEnded = true;
  
  		if (this.isDistanceSurpassed) {
  			this.startDrag(initialEv);
  		}
  	},
  
  
  	// Distance
  	// -----------------------------------------------------------------------------------------------------------------
  
  
  	handleDistanceSurpassed: function(ev) {
  		this.isDistanceSurpassed = true;
  
  		if (this.isDelayEnded) {
  			this.startDrag(ev);
  		}
  	},
  
  
  	// Mouse / Touch
  	// -----------------------------------------------------------------------------------------------------------------
  
  
  	handleTouchMove: function(ev) {
  		// prevent inertia and touchmove-scrolling while dragging
  		if (this.isDragging) {
  			ev.preventDefault();
  		}
  
  		this.handleMove(ev);
  	},
  
  
  	handleMouseMove: function(ev) {
  		this.handleMove(ev);
  	},
  
  
  	// Scrolling (unrelated to auto-scroll)
  	// -----------------------------------------------------------------------------------------------------------------
  
  
  	handleTouchScroll: function(ev) {
  		// if the drag is being initiated by touch, but a scroll happens before
  		// the drag-initiating delay is over, cancel the drag
  		if (!this.isDragging) {
  			this.endInteraction(ev, true); // isCancelled=true
  		}
  	},
  
  
  	// Utils
  	// -----------------------------------------------------------------------------------------------------------------
  
  
  	// Triggers a callback. Calls a function in the option hash of the same name.
  	// Arguments beyond the first `name` are forwarded on.
  	trigger: function(name) {
  		if (this.options[name]) {
  			this.options[name].apply(this, Array.prototype.slice.call(arguments, 1));
  		}
  		// makes _methods callable by event name. TODO: kill this
  		if (this['_' + name]) {
  			this['_' + name].apply(this, Array.prototype.slice.call(arguments, 1));
  		}
  	}
  
  
  });
  
  ;;
  /*
  this.scrollEl is set in DragListener
  */
  DragListener.mixin({
  
  	isAutoScroll: false,
  
  	scrollBounds: null, // { top, bottom, left, right }
  	scrollTopVel: null, // pixels per second
  	scrollLeftVel: null, // pixels per second
  	scrollIntervalId: null, // ID of setTimeout for scrolling animation loop
  
  	// defaults
  	scrollSensitivity: 30, // pixels from edge for scrolling to start
  	scrollSpeed: 200, // pixels per second, at maximum speed
  	scrollIntervalMs: 50, // millisecond wait between scroll increment
  
  
  	initAutoScroll: function() {
  		var scrollEl = this.scrollEl;
  
  		this.isAutoScroll =
  			this.options.scroll &&
  			scrollEl &&
  			!scrollEl.is(window) &&
  			!scrollEl.is(document);
  
  		if (this.isAutoScroll) {
  			// debounce makes sure rapid calls don't happen
  			this.listenTo(scrollEl, 'scroll', debounce(this.handleDebouncedScroll, 100));
  		}
  	},
  
  
  	destroyAutoScroll: function() {
  		this.endAutoScroll(); // kill any animation loop
  
  		// remove the scroll handler if there is a scrollEl
  		if (this.isAutoScroll) {
  			this.stopListeningTo(this.scrollEl, 'scroll'); // will probably get removed by unbindHandlers too :(
  		}
  	},
  
  
  	// Computes and stores the bounding rectangle of scrollEl
  	computeScrollBounds: function() {
  		if (this.isAutoScroll) {
  			this.scrollBounds = getOuterRect(this.scrollEl);
  			// TODO: use getClientRect in future. but prevents auto scrolling when on top of scrollbars
  		}
  	},
  
  
  	// Called when the dragging is in progress and scrolling should be updated
  	updateAutoScroll: function(ev) {
  		var sensitivity = this.scrollSensitivity;
  		var bounds = this.scrollBounds;
  		var topCloseness, bottomCloseness;
  		var leftCloseness, rightCloseness;
  		var topVel = 0;
  		var leftVel = 0;
  
  		if (bounds) { // only scroll if scrollEl exists
  
  			// compute closeness to edges. valid range is from 0.0 - 1.0
  			topCloseness = (sensitivity - (getEvY(ev) - bounds.top)) / sensitivity;
  			bottomCloseness = (sensitivity - (bounds.bottom - getEvY(ev))) / sensitivity;
  			leftCloseness = (sensitivity - (getEvX(ev) - bounds.left)) / sensitivity;
  			rightCloseness = (sensitivity - (bounds.right - getEvX(ev))) / sensitivity;
  
  			// translate vertical closeness into velocity.
  			// mouse must be completely in bounds for velocity to happen.
  			if (topCloseness >= 0 && topCloseness <= 1) {
  				topVel = topCloseness * this.scrollSpeed * -1; // negative. for scrolling up
  			}
  			else if (bottomCloseness >= 0 && bottomCloseness <= 1) {
  				topVel = bottomCloseness * this.scrollSpeed;
  			}
  
  			// translate horizontal closeness into velocity
  			if (leftCloseness >= 0 && leftCloseness <= 1) {
  				leftVel = leftCloseness * this.scrollSpeed * -1; // negative. for scrolling left
  			}
  			else if (rightCloseness >= 0 && rightCloseness <= 1) {
  				leftVel = rightCloseness * this.scrollSpeed;
  			}
  		}
  
  		this.setScrollVel(topVel, leftVel);
  	},
  
  
  	// Sets the speed-of-scrolling for the scrollEl
  	setScrollVel: function(topVel, leftVel) {
  
  		this.scrollTopVel = topVel;
  		this.scrollLeftVel = leftVel;
  
  		this.constrainScrollVel(); // massages into realistic values
  
  		// if there is non-zero velocity, and an animation loop hasn't already started, then START
  		if ((this.scrollTopVel || this.scrollLeftVel) && !this.scrollIntervalId) {
  			this.scrollIntervalId = setInterval(
  				proxy(this, 'scrollIntervalFunc'), // scope to `this`
  				this.scrollIntervalMs
  			);
  		}
  	},
  
  
  	// Forces scrollTopVel and scrollLeftVel to be zero if scrolling has already gone all the way
  	constrainScrollVel: function() {
  		var el = this.scrollEl;
  
  		if (this.scrollTopVel < 0) { // scrolling up?
  			if (el.scrollTop() <= 0) { // already scrolled all the way up?
  				this.scrollTopVel = 0;
  			}
  		}
  		else if (this.scrollTopVel > 0) { // scrolling down?
  			if (el.scrollTop() + el[0].clientHeight >= el[0].scrollHeight) { // already scrolled all the way down?
  				this.scrollTopVel = 0;
  			}
  		}
  
  		if (this.scrollLeftVel < 0) { // scrolling left?
  			if (el.scrollLeft() <= 0) { // already scrolled all the left?
  				this.scrollLeftVel = 0;
  			}
  		}
  		else if (this.scrollLeftVel > 0) { // scrolling right?
  			if (el.scrollLeft() + el[0].clientWidth >= el[0].scrollWidth) { // already scrolled all the way right?
  				this.scrollLeftVel = 0;
  			}
  		}
  	},
  
  
  	// This function gets called during every iteration of the scrolling animation loop
  	scrollIntervalFunc: function() {
  		var el = this.scrollEl;
  		var frac = this.scrollIntervalMs / 1000; // considering animation frequency, what the vel should be mult'd by
  
  		// change the value of scrollEl's scroll
  		if (this.scrollTopVel) {
  			el.scrollTop(el.scrollTop() + this.scrollTopVel * frac);
  		}
  		if (this.scrollLeftVel) {
  			el.scrollLeft(el.scrollLeft() + this.scrollLeftVel * frac);
  		}
  
  		this.constrainScrollVel(); // since the scroll values changed, recompute the velocities
  
  		// if scrolled all the way, which causes the vels to be zero, stop the animation loop
  		if (!this.scrollTopVel && !this.scrollLeftVel) {
  			this.endAutoScroll();
  		}
  	},
  
  
  	// Kills any existing scrolling animation loop
  	endAutoScroll: function() {
  		if (this.scrollIntervalId) {
  			clearInterval(this.scrollIntervalId);
  			this.scrollIntervalId = null;
  
  			this.handleScrollEnd();
  		}
  	},
  
  
  	// Get called when the scrollEl is scrolled (NOTE: this is delayed via debounce)
  	handleDebouncedScroll: function() {
  		// recompute all coordinates, but *only* if this is *not* part of our scrolling animation
  		if (!this.scrollIntervalId) {
  			this.handleScrollEnd();
  		}
  	},
  
  
  	// Called when scrolling has stopped, whether through auto scroll, or the user scrolling
  	handleScrollEnd: function() {
  	}
  
  });
  ;;
  
  /* Tracks mouse movements over a component and raises events about which hit the mouse is over.
  ------------------------------------------------------------------------------------------------------------------------
  options:
  - subjectEl
  - subjectCenter
  */
  
  var HitDragListener = DragListener.extend({
  
  	component: null, // converts coordinates to hits
  		// methods: prepareHits, releaseHits, queryHit
  
  	origHit: null, // the hit the mouse was over when listening started
  	hit: null, // the hit the mouse is over
  	coordAdjust: null, // delta that will be added to the mouse coordinates when computing collisions
  
  
  	constructor: function(component, options) {
  		DragListener.call(this, options); // call the super-constructor
  
  		this.component = component;
  	},
  
  
  	// Called when drag listening starts (but a real drag has not necessarily began).
  	// ev might be undefined if dragging was started manually.
  	handleInteractionStart: function(ev) {
  		var subjectEl = this.subjectEl;
  		var subjectRect;
  		var origPoint;
  		var point;
  
  		this.computeCoords();
  
  		if (ev) {
  			origPoint = { left: getEvX(ev), top: getEvY(ev) };
  			point = origPoint;
  
  			// constrain the point to bounds of the element being dragged
  			if (subjectEl) {
  				subjectRect = getOuterRect(subjectEl); // used for centering as well
  				point = constrainPoint(point, subjectRect);
  			}
  
  			this.origHit = this.queryHit(point.left, point.top);
  
  			// treat the center of the subject as the collision point?
  			if (subjectEl && this.options.subjectCenter) {
  
  				// only consider the area the subject overlaps the hit. best for large subjects.
  				// TODO: skip this if hit didn't supply left/right/top/bottom
  				if (this.origHit) {
  					subjectRect = intersectRects(this.origHit, subjectRect) ||
  						subjectRect; // in case there is no intersection
  				}
  
  				point = getRectCenter(subjectRect);
  			}
  
  			this.coordAdjust = diffPoints(point, origPoint); // point - origPoint
  		}
  		else {
  			this.origHit = null;
  			this.coordAdjust = null;
  		}
  
  		// call the super-method. do it after origHit has been computed
  		DragListener.prototype.handleInteractionStart.apply(this, arguments);
  	},
  
  
  	// Recomputes the drag-critical positions of elements
  	computeCoords: function() {
  		this.component.prepareHits();
  		this.computeScrollBounds(); // why is this here??????
  	},
  
  
  	// Called when the actual drag has started
  	handleDragStart: function(ev) {
  		var hit;
  
  		DragListener.prototype.handleDragStart.apply(this, arguments); // call the super-method
  
  		// might be different from this.origHit if the min-distance is large
  		hit = this.queryHit(getEvX(ev), getEvY(ev));
  
  		// report the initial hit the mouse is over
  		// especially important if no min-distance and drag starts immediately
  		if (hit) {
  			this.handleHitOver(hit);
  		}
  	},
  
  
  	// Called when the drag moves
  	handleDrag: function(dx, dy, ev) {
  		var hit;
  
  		DragListener.prototype.handleDrag.apply(this, arguments); // call the super-method
  
  		hit = this.queryHit(getEvX(ev), getEvY(ev));
  
  		if (!isHitsEqual(hit, this.hit)) { // a different hit than before?
  			if (this.hit) {
  				this.handleHitOut();
  			}
  			if (hit) {
  				this.handleHitOver(hit);
  			}
  		}
  	},
  
  
  	// Called when dragging has been stopped
  	handleDragEnd: function() {
  		this.handleHitDone();
  		DragListener.prototype.handleDragEnd.apply(this, arguments); // call the super-method
  	},
  
  
  	// Called when a the mouse has just moved over a new hit
  	handleHitOver: function(hit) {
  		var isOrig = isHitsEqual(hit, this.origHit);
  
  		this.hit = hit;
  
  		this.trigger('hitOver', this.hit, isOrig, this.origHit);
  	},
  
  
  	// Called when the mouse has just moved out of a hit
  	handleHitOut: function() {
  		if (this.hit) {
  			this.trigger('hitOut', this.hit);
  			this.handleHitDone();
  			this.hit = null;
  		}
  	},
  
  
  	// Called after a hitOut. Also called before a dragStop
  	handleHitDone: function() {
  		if (this.hit) {
  			this.trigger('hitDone', this.hit);
  		}
  	},
  
  
  	// Called when the interaction ends, whether there was a real drag or not
  	handleInteractionEnd: function() {
  		DragListener.prototype.handleInteractionEnd.apply(this, arguments); // call the super-method
  
  		this.origHit = null;
  		this.hit = null;
  
  		this.component.releaseHits();
  	},
  
  
  	// Called when scrolling has stopped, whether through auto scroll, or the user scrolling
  	handleScrollEnd: function() {
  		DragListener.prototype.handleScrollEnd.apply(this, arguments); // call the super-method
  
  		this.computeCoords(); // hits' absolute positions will be in new places. recompute
  	},
  
  
  	// Gets the hit underneath the coordinates for the given mouse event
  	queryHit: function(left, top) {
  
  		if (this.coordAdjust) {
  			left += this.coordAdjust.left;
  			top += this.coordAdjust.top;
  		}
  
  		return this.component.queryHit(left, top);
  	}
  
  });
  
  
  // Returns `true` if the hits are identically equal. `false` otherwise. Must be from the same component.
  // Two null values will be considered equal, as two "out of the component" states are the same.
  function isHitsEqual(hit0, hit1) {
  
  	if (!hit0 && !hit1) {
  		return true;
  	}
  
  	if (hit0 && hit1) {
  		return hit0.component === hit1.component &&
  			isHitPropsWithin(hit0, hit1) &&
  			isHitPropsWithin(hit1, hit0); // ensures all props are identical
  	}
  
  	return false;
  }
  
  
  // Returns true if all of subHit's non-standard properties are within superHit
  function isHitPropsWithin(subHit, superHit) {
  	for (var propName in subHit) {
  		if (!/^(component|left|right|top|bottom)$/.test(propName)) {
  			if (subHit[propName] !== superHit[propName]) {
  				return false;
  			}
  		}
  	}
  	return true;
  }
  
  ;;
  
  /* Creates a clone of an element and lets it track the mouse as it moves
  ----------------------------------------------------------------------------------------------------------------------*/
  
  var MouseFollower = Class.extend(ListenerMixin, {
  
  	options: null,
  
  	sourceEl: null, // the element that will be cloned and made to look like it is dragging
  	el: null, // the clone of `sourceEl` that will track the mouse
  	parentEl: null, // the element that `el` (the clone) will be attached to
  
  	// the initial position of el, relative to the offset parent. made to match the initial offset of sourceEl
  	top0: null,
  	left0: null,
  
  	// the absolute coordinates of the initiating touch/mouse action
  	y0: null,
  	x0: null,
  
  	// the number of pixels the mouse has moved from its initial position
  	topDelta: null,
  	leftDelta: null,
  
  	isFollowing: false,
  	isHidden: false,
  	isAnimating: false, // doing the revert animation?
  
  	constructor: function(sourceEl, options) {
  		this.options = options = options || {};
  		this.sourceEl = sourceEl;
  		this.parentEl = options.parentEl ? $(options.parentEl) : sourceEl.parent(); // default to sourceEl's parent
  	},
  
  
  	// Causes the element to start following the mouse
  	start: function(ev) {
  		if (!this.isFollowing) {
  			this.isFollowing = true;
  
  			this.y0 = getEvY(ev);
  			this.x0 = getEvX(ev);
  			this.topDelta = 0;
  			this.leftDelta = 0;
  
  			if (!this.isHidden) {
  				this.updatePosition();
  			}
  
  			if (getEvIsTouch(ev)) {
  				this.listenTo($(document), 'touchmove', this.handleMove);
  			}
  			else {
  				this.listenTo($(document), 'mousemove', this.handleMove);
  			}
  		}
  	},
  
  
  	// Causes the element to stop following the mouse. If shouldRevert is true, will animate back to original position.
  	// `callback` gets invoked when the animation is complete. If no animation, it is invoked immediately.
  	stop: function(shouldRevert, callback) {
  		var _this = this;
  		var revertDuration = this.options.revertDuration;
  
  		function complete() { // might be called by .animate(), which might change `this` context
  			_this.isAnimating = false;
  			_this.removeElement();
  
  			_this.top0 = _this.left0 = null; // reset state for future updatePosition calls
  
  			if (callback) {
  				callback();
  			}
  		}
  
  		if (this.isFollowing && !this.isAnimating) { // disallow more than one stop animation at a time
  			this.isFollowing = false;
  
  			this.stopListeningTo($(document));
  
  			if (shouldRevert && revertDuration && !this.isHidden) { // do a revert animation?
  				this.isAnimating = true;
  				this.el.animate({
  					top: this.top0,
  					left: this.left0
  				}, {
  					duration: revertDuration,
  					complete: complete
  				});
  			}
  			else {
  				complete();
  			}
  		}
  	},
  
  
  	// Gets the tracking element. Create it if necessary
  	getEl: function() {
  		var el = this.el;
  
  		if (!el) {
  			el = this.el = this.sourceEl.clone()
  				.addClass(this.options.additionalClass || '')
  				.css({
  					position: 'absolute',
  					visibility: '', // in case original element was hidden (commonly through hideEvents())
  					display: this.isHidden ? 'none' : '', // for when initially hidden
  					margin: 0,
  					right: 'auto', // erase and set width instead
  					bottom: 'auto', // erase and set height instead
  					width: this.sourceEl.width(), // explicit height in case there was a 'right' value
  					height: this.sourceEl.height(), // explicit width in case there was a 'bottom' value
  					opacity: this.options.opacity || '',
  					zIndex: this.options.zIndex
  				});
  
  			// we don't want long taps or any mouse interaction causing selection/menus.
  			// would use preventSelection(), but that prevents selectstart, causing problems.
  			el.addClass('fc-unselectable');
  
  			el.appendTo(this.parentEl);
  		}
  
  		return el;
  	},
  
  
  	// Removes the tracking element if it has already been created
  	removeElement: function() {
  		if (this.el) {
  			this.el.remove();
  			this.el = null;
  		}
  	},
  
  
  	// Update the CSS position of the tracking element
  	updatePosition: function() {
  		var sourceOffset;
  		var origin;
  
  		this.getEl(); // ensure this.el
  
  		// make sure origin info was computed
  		if (this.top0 === null) {
  			sourceOffset = this.sourceEl.offset();
  			origin = this.el.offsetParent().offset();
  			this.top0 = sourceOffset.top - origin.top;
  			this.left0 = sourceOffset.left - origin.left;
  		}
  
  		this.el.css({
  			top: this.top0 + this.topDelta,
  			left: this.left0 + this.leftDelta
  		});
  	},
  
  
  	// Gets called when the user moves the mouse
  	handleMove: function(ev) {
  		this.topDelta = getEvY(ev) - this.y0;
  		this.leftDelta = getEvX(ev) - this.x0;
  
  		if (!this.isHidden) {
  			this.updatePosition();
  		}
  	},
  
  
  	// Temporarily makes the tracking element invisible. Can be called before following starts
  	hide: function() {
  		if (!this.isHidden) {
  			this.isHidden = true;
  			if (this.el) {
  				this.el.hide();
  			}
  		}
  	},
  
  
  	// Show the tracking element after it has been temporarily hidden
  	show: function() {
  		if (this.isHidden) {
  			this.isHidden = false;
  			this.updatePosition();
  			this.getEl().show();
  		}
  	}
  
  });
  
  ;;
  
  /* An abstract class comprised of a "grid" of areas that each represent a specific datetime
  ----------------------------------------------------------------------------------------------------------------------*/
  
  var Grid = FC.Grid = Class.extend(ListenerMixin, MouseIgnorerMixin, {
  
  	// self-config, overridable by subclasses
  	hasDayInteractions: true, // can user click/select ranges of time?
  
  	view: null, // a View object
  	isRTL: null, // shortcut to the view's isRTL option
  
  	start: null,
  	end: null,
  
  	el: null, // the containing element
  	elsByFill: null, // a hash of jQuery element sets used for rendering each fill. Keyed by fill name.
  
  	// derived from options
  	eventTimeFormat: null,
  	displayEventTime: null,
  	displayEventEnd: null,
  
  	minResizeDuration: null, // TODO: hack. set by subclasses. minumum event resize duration
  
  	// if defined, holds the unit identified (ex: "year" or "month") that determines the level of granularity
  	// of the date areas. if not defined, assumes to be day and time granularity.
  	// TODO: port isTimeScale into same system?
  	largeUnit: null,
  
  	dayDragListener: null,
  	segDragListener: null,
  	segResizeListener: null,
  	externalDragListener: null,
  
  
  	constructor: function(view) {
  		this.view = view;
  		this.isRTL = view.opt('isRTL');
  		this.elsByFill = {};
  
  		this.dayDragListener = this.buildDayDragListener();
  		this.initMouseIgnoring();
  	},
  
  
  	/* Options
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Generates the format string used for event time text, if not explicitly defined by 'timeFormat'
  	computeEventTimeFormat: function() {
  		return this.view.opt('smallTimeFormat');
  	},
  
  
  	// Determines whether events should have their end times displayed, if not explicitly defined by 'displayEventTime'.
  	// Only applies to non-all-day events.
  	computeDisplayEventTime: function() {
  		return true;
  	},
  
  
  	// Determines whether events should have their end times displayed, if not explicitly defined by 'displayEventEnd'
  	computeDisplayEventEnd: function() {
  		return true;
  	},
  
  
  	/* Dates
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Tells the grid about what period of time to display.
  	// Any date-related internal data should be generated.
  	setRange: function(range) {
  		this.start = range.start.clone();
  		this.end = range.end.clone();
  
  		this.rangeUpdated();
  		this.processRangeOptions();
  	},
  
  
  	// Called when internal variables that rely on the range should be updated
  	rangeUpdated: function() {
  	},
  
  
  	// Updates values that rely on options and also relate to range
  	processRangeOptions: function() {
  		var view = this.view;
  		var displayEventTime;
  		var displayEventEnd;
  
  		this.eventTimeFormat =
  			view.opt('eventTimeFormat') ||
  			view.opt('timeFormat') || // deprecated
  			this.computeEventTimeFormat();
  
  		displayEventTime = view.opt('displayEventTime');
  		if (displayEventTime == null) {
  			displayEventTime = this.computeDisplayEventTime(); // might be based off of range
  		}
  
  		displayEventEnd = view.opt('displayEventEnd');
  		if (displayEventEnd == null) {
  			displayEventEnd = this.computeDisplayEventEnd(); // might be based off of range
  		}
  
  		this.displayEventTime = displayEventTime;
  		this.displayEventEnd = displayEventEnd;
  	},
  
  
  	// Converts a span (has unzoned start/end and any other grid-specific location information)
  	// into an array of segments (pieces of events whose format is decided by the grid).
  	spanToSegs: function(span) {
  		// subclasses must implement
  	},
  
  
  	// Diffs the two dates, returning a duration, based on granularity of the grid
  	// TODO: port isTimeScale into this system?
  	diffDates: function(a, b) {
  		if (this.largeUnit) {
  			return diffByUnit(a, b, this.largeUnit);
  		}
  		else {
  			return diffDayTime(a, b);
  		}
  	},
  
  
  	/* Hit Area
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Called before one or more queryHit calls might happen. Should prepare any cached coordinates for queryHit
  	prepareHits: function() {
  	},
  
  
  	// Called when queryHit calls have subsided. Good place to clear any coordinate caches.
  	releaseHits: function() {
  	},
  
  
  	// Given coordinates from the topleft of the document, return data about the date-related area underneath.
  	// Can return an object with arbitrary properties (although top/right/left/bottom are encouraged).
  	// Must have a `grid` property, a reference to this current grid. TODO: avoid this
  	// The returned object will be processed by getHitSpan and getHitEl.
  	queryHit: function(leftOffset, topOffset) {
  	},
  
  
  	// Given position-level information about a date-related area within the grid,
  	// should return an object with at least a start/end date. Can provide other information as well.
  	getHitSpan: function(hit) {
  	},
  
  
  	// Given position-level information about a date-related area within the grid,
  	// should return a jQuery element that best represents it. passed to dayClick callback.
  	getHitEl: function(hit) {
  	},
  
  
  	/* Rendering
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Sets the container element that the grid should render inside of.
  	// Does other DOM-related initializations.
  	setElement: function(el) {
  		this.el = el;
  
  		if (this.hasDayInteractions) {
  			preventSelection(el);
  
  			this.bindDayHandler('touchstart', this.dayTouchStart);
  			this.bindDayHandler('mousedown', this.dayMousedown);
  		}
  
  		// attach event-element-related handlers. in Grid.events
  		// same garbage collection note as above.
  		this.bindSegHandlers();
  
  		this.bindGlobalHandlers();
  	},
  
  
  	bindDayHandler: function(name, handler) {
  		var _this = this;
  
  		// attach a handler to the grid's root element.
  		// jQuery will take care of unregistering them when removeElement gets called.
  		this.el.on(name, function(ev) {
  			if (
  				!$(ev.target).is(
  					_this.segSelector + ',' + // directly on an event element
  					_this.segSelector + ' *,' + // within an event element
  					'.fc-more,' + // a "more.." link
  					'a[data-goto]' // a clickable nav link
  				)
  			) {
  				return handler.call(_this, ev);
  			}
  		});
  	},
  
  
  	// Removes the grid's container element from the DOM. Undoes any other DOM-related attachments.
  	// DOES NOT remove any content beforehand (doesn't clear events or call unrenderDates), unlike View
  	removeElement: function() {
  		this.unbindGlobalHandlers();
  		this.clearDragListeners();
  
  		this.el.remove();
  
  		// NOTE: we don't null-out this.el for the same reasons we don't do it within View::removeElement
  	},
  
  
  	// Renders the basic structure of grid view before any content is rendered
  	renderSkeleton: function() {
  		// subclasses should implement
  	},
  
  
  	// Renders the grid's date-related content (like areas that represent days/times).
  	// Assumes setRange has already been called and the skeleton has already been rendered.
  	renderDates: function() {
  		// subclasses should implement
  	},
  
  
  	// Unrenders the grid's date-related content
  	unrenderDates: function() {
  		// subclasses should implement
  	},
  
  
  	/* Handlers
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Binds DOM handlers to elements that reside outside the grid, such as the document
  	bindGlobalHandlers: function() {
  		this.listenTo($(document), {
  			dragstart: this.externalDragStart, // jqui
  			sortstart: this.externalDragStart // jqui
  		});
  	},
  
  
  	// Unbinds DOM handlers from elements that reside outside the grid
  	unbindGlobalHandlers: function() {
  		this.stopListeningTo($(document));
  	},
  
  
  	// Process a mousedown on an element that represents a day. For day clicking and selecting.
  	dayMousedown: function(ev) {
  		if (!this.isIgnoringMouse) {
  			this.dayDragListener.startInteraction(ev, {
  				//distance: 5, // needs more work if we want dayClick to fire correctly
  			});
  		}
  	},
  
  
  	dayTouchStart: function(ev) {
  		var view = this.view;
  
  		// HACK to prevent a user's clickaway for unselecting a range or an event
  		// from causing a dayClick.
  		if (view.isSelected || view.selectedEvent) {
  			this.tempIgnoreMouse();
  		}
  
  		this.dayDragListener.startInteraction(ev, {
  			delay: this.view.opt('longPressDelay')
  		});
  	},
  
  
  	// Creates a listener that tracks the user's drag across day elements.
  	// For day clicking and selecting.
  	buildDayDragListener: function() {
  		var _this = this;
  		var view = this.view;
  		var isSelectable = view.opt('selectable');
  		var dayClickHit; // null if invalid dayClick
  		var selectionSpan; // null if invalid selection
  
  		// this listener tracks a mousedown on a day element, and a subsequent drag.
  		// if the drag ends on the same day, it is a 'dayClick'.
  		// if 'selectable' is enabled, this listener also detects selections.
  		var dragListener = new HitDragListener(this, {
  			scroll: view.opt('dragScroll'),
  			interactionStart: function() {
  				dayClickHit = dragListener.origHit; // for dayClick, where no dragging happens
  				selectionSpan = null;
  			},
  			dragStart: function() {
  				view.unselect(); // since we could be rendering a new selection, we want to clear any old one
  			},
  			hitOver: function(hit, isOrig, origHit) {
  				if (origHit) { // click needs to have started on a hit
  
  					// if user dragged to another cell at any point, it can no longer be a dayClick
  					if (!isOrig) {
  						dayClickHit = null;
  					}
  
  					if (isSelectable) {
  						selectionSpan = _this.computeSelection(
  							_this.getHitSpan(origHit),
  							_this.getHitSpan(hit)
  						);
  						if (selectionSpan) {
  							_this.renderSelection(selectionSpan);
  						}
  						else if (selectionSpan === false) {
  							disableCursor();
  						}
  					}
  				}
  			},
  			hitOut: function() { // called before mouse moves to a different hit OR moved out of all hits
  				dayClickHit = null;
  				selectionSpan = null;
  				_this.unrenderSelection();
  			},
  			hitDone: function() { // called after a hitOut OR before a dragEnd
  				enableCursor();
  			},
  			interactionEnd: function(ev, isCancelled) {
  				if (!isCancelled) {
  					if (
  						dayClickHit &&
  						!_this.isIgnoringMouse // see hack in dayTouchStart
  					) {
  						view.triggerDayClick(
  							_this.getHitSpan(dayClickHit),
  							_this.getHitEl(dayClickHit),
  							ev
  						);
  					}
  					if (selectionSpan) {
  						// the selection will already have been rendered. just report it
  						view.reportSelection(selectionSpan, ev);
  					}
  				}
  			}
  		});
  
  		return dragListener;
  	},
  
  
  	// Kills all in-progress dragging.
  	// Useful for when public API methods that result in re-rendering are invoked during a drag.
  	// Also useful for when touch devices misbehave and don't fire their touchend.
  	clearDragListeners: function() {
  		this.dayDragListener.endInteraction();
  
  		if (this.segDragListener) {
  			this.segDragListener.endInteraction(); // will clear this.segDragListener
  		}
  		if (this.segResizeListener) {
  			this.segResizeListener.endInteraction(); // will clear this.segResizeListener
  		}
  		if (this.externalDragListener) {
  			this.externalDragListener.endInteraction(); // will clear this.externalDragListener
  		}
  	},
  
  
  	/* Event Helper
  	------------------------------------------------------------------------------------------------------------------*/
  	// TODO: should probably move this to Grid.events, like we did event dragging / resizing
  
  
  	// Renders a mock event at the given event location, which contains zoned start/end properties.
  	// Returns all mock event elements.
  	renderEventLocationHelper: function(eventLocation, sourceSeg) {
  		var fakeEvent = this.fabricateHelperEvent(eventLocation, sourceSeg);
  
  		return this.renderHelper(fakeEvent, sourceSeg); // do the actual rendering
  	},
  
  
  	// Builds a fake event given zoned event date properties and a segment is should be inspired from.
  	// The range's end can be null, in which case the mock event that is rendered will have a null end time.
  	// `sourceSeg` is the internal segment object involved in the drag. If null, something external is dragging.
  	fabricateHelperEvent: function(eventLocation, sourceSeg) {
  		var fakeEvent = sourceSeg ? createObject(sourceSeg.event) : {}; // mask the original event object if possible
  
  		fakeEvent.start = eventLocation.start.clone();
  		fakeEvent.end = eventLocation.end ? eventLocation.end.clone() : null;
  		fakeEvent.allDay = null; // force it to be freshly computed by normalizeEventDates
  		this.view.calendar.normalizeEventDates(fakeEvent);
  
  		// this extra className will be useful for differentiating real events from mock events in CSS
  		fakeEvent.className = (fakeEvent.className || []).concat('fc-helper');
  
  		// if something external is being dragged in, don't render a resizer
  		if (!sourceSeg) {
  			fakeEvent.editable = false;
  		}
  
  		return fakeEvent;
  	},
  
  
  	// Renders a mock event. Given zoned event date properties.
  	// Must return all mock event elements.
  	renderHelper: function(eventLocation, sourceSeg) {
  		// subclasses must implement
  	},
  
  
  	// Unrenders a mock event
  	unrenderHelper: function() {
  		// subclasses must implement
  	},
  
  
  	/* Selection
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders a visual indication of a selection. Will highlight by default but can be overridden by subclasses.
  	// Given a span (unzoned start/end and other misc data)
  	renderSelection: function(span) {
  		this.renderHighlight(span);
  	},
  
  
  	// Unrenders any visual indications of a selection. Will unrender a highlight by default.
  	unrenderSelection: function() {
  		this.unrenderHighlight();
  	},
  
  
  	// Given the first and last date-spans of a selection, returns another date-span object.
  	// Subclasses can override and provide additional data in the span object. Will be passed to renderSelection().
  	// Will return false if the selection is invalid and this should be indicated to the user.
  	// Will return null/undefined if a selection invalid but no error should be reported.
  	computeSelection: function(span0, span1) {
  		var span = this.computeSelectionSpan(span0, span1);
  
  		if (span && !this.view.calendar.isSelectionSpanAllowed(span)) {
  			return false;
  		}
  
  		return span;
  	},
  
  
  	// Given two spans, must return the combination of the two.
  	// TODO: do this separation of concerns (combining VS validation) for event dnd/resize too.
  	computeSelectionSpan: function(span0, span1) {
  		var dates = [ span0.start, span0.end, span1.start, span1.end ];
  
  		dates.sort(compareNumbers); // sorts chronologically. works with Moments
  
  		return { start: dates[0].clone(), end: dates[3].clone() };
  	},
  
  
  	/* Highlight
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders an emphasis on the given date range. Given a span (unzoned start/end and other misc data)
  	renderHighlight: function(span) {
  		this.renderFill('highlight', this.spanToSegs(span));
  	},
  
  
  	// Unrenders the emphasis on a date range
  	unrenderHighlight: function() {
  		this.unrenderFill('highlight');
  	},
  
  
  	// Generates an array of classNames for rendering the highlight. Used by the fill system.
  	highlightSegClasses: function() {
  		return [ 'fc-highlight' ];
  	},
  
  
  	/* Business Hours
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	renderBusinessHours: function() {
  	},
  
  
  	unrenderBusinessHours: function() {
  	},
  
  
  	/* Now Indicator
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	getNowIndicatorUnit: function() {
  	},
  
  
  	renderNowIndicator: function(date) {
  	},
  
  
  	unrenderNowIndicator: function() {
  	},
  
  
  	/* Fill System (highlight, background events, business hours)
  	--------------------------------------------------------------------------------------------------------------------
  	TODO: remove this system. like we did in TimeGrid
  	*/
  
  
  	// Renders a set of rectangles over the given segments of time.
  	// MUST RETURN a subset of segs, the segs that were actually rendered.
  	// Responsible for populating this.elsByFill. TODO: better API for expressing this requirement
  	renderFill: function(type, segs) {
  		// subclasses must implement
  	},
  
  
  	// Unrenders a specific type of fill that is currently rendered on the grid
  	unrenderFill: function(type) {
  		var el = this.elsByFill[type];
  
  		if (el) {
  			el.remove();
  			delete this.elsByFill[type];
  		}
  	},
  
  
  	// Renders and assigns an `el` property for each fill segment. Generic enough to work with different types.
  	// Only returns segments that successfully rendered.
  	// To be harnessed by renderFill (implemented by subclasses).
  	// Analagous to renderFgSegEls.
  	renderFillSegEls: function(type, segs) {
  		var _this = this;
  		var segElMethod = this[type + 'SegEl'];
  		var html = '';
  		var renderedSegs = [];
  		var i;
  
  		if (segs.length) {
  
  			// build a large concatenation of segment HTML
  			for (i = 0; i < segs.length; i++) {
  				html += this.fillSegHtml(type, segs[i]);
  			}
  
  			// Grab individual elements from the combined HTML string. Use each as the default rendering.
  			// Then, compute the 'el' for each segment.
  			$(html).each(function(i, node) {
  				var seg = segs[i];
  				var el = $(node);
  
  				// allow custom filter methods per-type
  				if (segElMethod) {
  					el = segElMethod.call(_this, seg, el);
  				}
  
  				if (el) { // custom filters did not cancel the render
  					el = $(el); // allow custom filter to return raw DOM node
  
  					// correct element type? (would be bad if a non-TD were inserted into a table for example)
  					if (el.is(_this.fillSegTag)) {
  						seg.el = el;
  						renderedSegs.push(seg);
  					}
  				}
  			});
  		}
  
  		return renderedSegs;
  	},
  
  
  	fillSegTag: 'div', // subclasses can override
  
  
  	// Builds the HTML needed for one fill segment. Generic enough to work with different types.
  	fillSegHtml: function(type, seg) {
  
  		// custom hooks per-type
  		var classesMethod = this[type + 'SegClasses'];
  		var cssMethod = this[type + 'SegCss'];
  
  		var classes = classesMethod ? classesMethod.call(this, seg) : [];
  		var css = cssToStr(cssMethod ? cssMethod.call(this, seg) : {});
  
  		return '<' + this.fillSegTag +
  			(classes.length ? ' class="' + classes.join(' ') + '"' : '') +
  			(css ? ' style="' + css + '"' : '') +
  			' />';
  	},
  
  
  
  	/* Generic rendering utilities for subclasses
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Computes HTML classNames for a single-day element
  	getDayClasses: function(date) {
  		var view = this.view;
  		var today = view.calendar.getNow();
  		var classes = [ 'fc-' + dayIDs[date.day()] ];
  
  		if (
  			view.intervalDuration.as('months') == 1 &&
  			date.month() != view.intervalStart.month()
  		) {
  			classes.push('fc-other-month');
  		}
  
  		if (date.isSame(today, 'day')) {
  			classes.push(
  				'fc-today',
  				view.highlightStateClass
  			);
  		}
  		else if (date < today) {
  			classes.push('fc-past');
  		}
  		else {
  			classes.push('fc-future');
  		}
  
  		return classes;
  	}
  
  });
  
  ;;
  
  /* Event-rendering and event-interaction methods for the abstract Grid class
  ----------------------------------------------------------------------------------------------------------------------*/
  
  Grid.mixin({
  
  	// self-config, overridable by subclasses
  	segSelector: '.fc-event-container > *', // what constitutes an event element?
  
  	mousedOverSeg: null, // the segment object the user's mouse is over. null if over nothing
  	isDraggingSeg: false, // is a segment being dragged? boolean
  	isResizingSeg: false, // is a segment being resized? boolean
  	isDraggingExternal: false, // jqui-dragging an external element? boolean
  	segs: null, // the *event* segments currently rendered in the grid. TODO: rename to `eventSegs`
  
  
  	// Renders the given events onto the grid
  	renderEvents: function(events) {
  		var bgEvents = [];
  		var fgEvents = [];
  		var i;
  
  		for (i = 0; i < events.length; i++) {
  			(isBgEvent(events[i]) ? bgEvents : fgEvents).push(events[i]);
  		}
  
  		this.segs = [].concat( // record all segs
  			this.renderBgEvents(bgEvents),
  			this.renderFgEvents(fgEvents)
  		);
  	},
  
  
  	renderBgEvents: function(events) {
  		var segs = this.eventsToSegs(events);
  
  		// renderBgSegs might return a subset of segs, segs that were actually rendered
  		return this.renderBgSegs(segs) || segs;
  	},
  
  
  	renderFgEvents: function(events) {
  		var segs = this.eventsToSegs(events);
  
  		// renderFgSegs might return a subset of segs, segs that were actually rendered
  		return this.renderFgSegs(segs) || segs;
  	},
  
  
  	// Unrenders all events currently rendered on the grid
  	unrenderEvents: function() {
  		this.handleSegMouseout(); // trigger an eventMouseout if user's mouse is over an event
  		this.clearDragListeners();
  
  		this.unrenderFgSegs();
  		this.unrenderBgSegs();
  
  		this.segs = null;
  	},
  
  
  	// Retrieves all rendered segment objects currently rendered on the grid
  	getEventSegs: function() {
  		return this.segs || [];
  	},
  
  
  	/* Foreground Segment Rendering
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders foreground event segments onto the grid. May return a subset of segs that were rendered.
  	renderFgSegs: function(segs) {
  		// subclasses must implement
  	},
  
  
  	// Unrenders all currently rendered foreground segments
  	unrenderFgSegs: function() {
  		// subclasses must implement
  	},
  
  
  	// Renders and assigns an `el` property for each foreground event segment.
  	// Only returns segments that successfully rendered.
  	// A utility that subclasses may use.
  	renderFgSegEls: function(segs, disableResizing) {
  		var view = this.view;
  		var html = '';
  		var renderedSegs = [];
  		var i;
  
  		if (segs.length) { // don't build an empty html string
  
  			// build a large concatenation of event segment HTML
  			for (i = 0; i < segs.length; i++) {
  				html += this.fgSegHtml(segs[i], disableResizing);
  			}
  
  			// Grab individual elements from the combined HTML string. Use each as the default rendering.
  			// Then, compute the 'el' for each segment. An el might be null if the eventRender callback returned false.
  			$(html).each(function(i, node) {
  				var seg = segs[i];
  				var el = view.resolveEventEl(seg.event, $(node));
  
  				if (el) {
  					el.data('fc-seg', seg); // used by handlers
  					seg.el = el;
  					renderedSegs.push(seg);
  				}
  			});
  		}
  
  		return renderedSegs;
  	},
  
  
  	// Generates the HTML for the default rendering of a foreground event segment. Used by renderFgSegEls()
  	fgSegHtml: function(seg, disableResizing) {
  		// subclasses should implement
  	},
  
  
  	/* Background Segment Rendering
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders the given background event segments onto the grid.
  	// Returns a subset of the segs that were actually rendered.
  	renderBgSegs: function(segs) {
  		return this.renderFill('bgEvent', segs);
  	},
  
  
  	// Unrenders all the currently rendered background event segments
  	unrenderBgSegs: function() {
  		this.unrenderFill('bgEvent');
  	},
  
  
  	// Renders a background event element, given the default rendering. Called by the fill system.
  	bgEventSegEl: function(seg, el) {
  		return this.view.resolveEventEl(seg.event, el); // will filter through eventRender
  	},
  
  
  	// Generates an array of classNames to be used for the default rendering of a background event.
  	// Called by fillSegHtml.
  	bgEventSegClasses: function(seg) {
  		var event = seg.event;
  		var source = event.source || {};
  
  		return [ 'fc-bgevent' ].concat(
  			event.className,
  			source.className || []
  		);
  	},
  
  
  	// Generates a semicolon-separated CSS string to be used for the default rendering of a background event.
  	// Called by fillSegHtml.
  	bgEventSegCss: function(seg) {
  		return {
  			'background-color': this.getSegSkinCss(seg)['background-color']
  		};
  	},
  
  
  	// Generates an array of classNames to be used for the rendering business hours overlay. Called by the fill system.
  	// Called by fillSegHtml.
  	businessHoursSegClasses: function(seg) {
  		return [ 'fc-nonbusiness', 'fc-bgevent' ];
  	},
  
  
  	/* Business Hours
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Compute business hour segs for the grid's current date range.
  	// Caller must ask if whole-day business hours are needed.
  	buildBusinessHourSegs: function(wholeDay) {
  		var events = this.view.calendar.getCurrentBusinessHourEvents(wholeDay);
  
  		// HACK. Eventually refactor business hours "events" system.
  		// If no events are given, but businessHours is activated, this means the entire visible range should be
  		// marked as *not* business-hours, via inverse-background rendering.
  		if (
  			!events.length &&
  			this.view.calendar.options.businessHours // don't access view option. doesn't update with dynamic options
  		) {
  			events = [
  				$.extend({}, BUSINESS_HOUR_EVENT_DEFAULTS, {
  					start: this.view.end, // guaranteed out-of-range
  					end: this.view.end,   // "
  					dow: null
  				})
  			];
  		}
  
  		return this.eventsToSegs(events);
  	},
  
  
  	/* Handlers
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Attaches event-element-related handlers for *all* rendered event segments of the view.
  	bindSegHandlers: function() {
  		this.bindSegHandlersToEl(this.el);
  	},
  
  
  	// Attaches event-element-related handlers to an arbitrary container element. leverages bubbling.
  	bindSegHandlersToEl: function(el) {
  		this.bindSegHandlerToEl(el, 'touchstart', this.handleSegTouchStart);
  		this.bindSegHandlerToEl(el, 'touchend', this.handleSegTouchEnd);
  		this.bindSegHandlerToEl(el, 'mouseenter', this.handleSegMouseover);
  		this.bindSegHandlerToEl(el, 'mouseleave', this.handleSegMouseout);
  		this.bindSegHandlerToEl(el, 'mousedown', this.handleSegMousedown);
  		this.bindSegHandlerToEl(el, 'click', this.handleSegClick);
  	},
  
  
  	// Executes a handler for any a user-interaction on a segment.
  	// Handler gets called with (seg, ev), and with the `this` context of the Grid
  	bindSegHandlerToEl: function(el, name, handler) {
  		var _this = this;
  
  		el.on(name, this.segSelector, function(ev) {
  			var seg = $(this).data('fc-seg'); // grab segment data. put there by View::renderEvents
  
  			// only call the handlers if there is not a drag/resize in progress
  			if (seg && !_this.isDraggingSeg && !_this.isResizingSeg) {
  				return handler.call(_this, seg, ev); // context will be the Grid
  			}
  		});
  	},
  
  
  	handleSegClick: function(seg, ev) {
  		var res = this.view.trigger('eventClick', seg.el[0], seg.event, ev); // can return `false` to cancel
  		if (res === false) {
  			ev.preventDefault();
  		}
  	},
  
  
  	// Updates internal state and triggers handlers for when an event element is moused over
  	handleSegMouseover: function(seg, ev) {
  		if (
  			!this.isIgnoringMouse &&
  			!this.mousedOverSeg
  		) {
  			this.mousedOverSeg = seg;
  			if (this.view.isEventResizable(seg.event)) {
  				seg.el.addClass('fc-allow-mouse-resize');
  			}
  			this.view.trigger('eventMouseover', seg.el[0], seg.event, ev);
  		}
  	},
  
  
  	// Updates internal state and triggers handlers for when an event element is moused out.
  	// Can be given no arguments, in which case it will mouseout the segment that was previously moused over.
  	handleSegMouseout: function(seg, ev) {
  		ev = ev || {}; // if given no args, make a mock mouse event
  
  		if (this.mousedOverSeg) {
  			seg = seg || this.mousedOverSeg; // if given no args, use the currently moused-over segment
  			this.mousedOverSeg = null;
  			if (this.view.isEventResizable(seg.event)) {
  				seg.el.removeClass('fc-allow-mouse-resize');
  			}
  			this.view.trigger('eventMouseout', seg.el[0], seg.event, ev);
  		}
  	},
  
  
  	handleSegMousedown: function(seg, ev) {
  		var isResizing = this.startSegResize(seg, ev, { distance: 5 });
  
  		if (!isResizing && this.view.isEventDraggable(seg.event)) {
  			this.buildSegDragListener(seg)
  				.startInteraction(ev, {
  					distance: 5
  				});
  		}
  	},
  
  
  	handleSegTouchStart: function(seg, ev) {
  		var view = this.view;
  		var event = seg.event;
  		var isSelected = view.isEventSelected(event);
  		var isDraggable = view.isEventDraggable(event);
  		var isResizable = view.isEventResizable(event);
  		var isResizing = false;
  		var dragListener;
  
  		if (isSelected && isResizable) {
  			// only allow resizing of the event is selected
  			isResizing = this.startSegResize(seg, ev);
  		}
  
  		if (!isResizing && (isDraggable || isResizable)) { // allowed to be selected?
  
  			dragListener = isDraggable ?
  				this.buildSegDragListener(seg) :
  				this.buildSegSelectListener(seg); // seg isn't draggable, but still needs to be selected
  
  			dragListener.startInteraction(ev, { // won't start if already started
  				delay: isSelected ? 0 : this.view.opt('longPressDelay') // do delay if not already selected
  			});
  		}
  
  		// a long tap simulates a mouseover. ignore this bogus mouseover.
  		this.tempIgnoreMouse();
  	},
  
  
  	handleSegTouchEnd: function(seg, ev) {
  		// touchstart+touchend = click, which simulates a mouseover.
  		// ignore this bogus mouseover.
  		this.tempIgnoreMouse();
  	},
  
  
  	// returns boolean whether resizing actually started or not.
  	// assumes the seg allows resizing.
  	// `dragOptions` are optional.
  	startSegResize: function(seg, ev, dragOptions) {
  		if ($(ev.target).is('.fc-resizer')) {
  			this.buildSegResizeListener(seg, $(ev.target).is('.fc-start-resizer'))
  				.startInteraction(ev, dragOptions);
  			return true;
  		}
  		return false;
  	},
  
  
  
  	/* Event Dragging
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Builds a listener that will track user-dragging on an event segment.
  	// Generic enough to work with any type of Grid.
  	// Has side effect of setting/unsetting `segDragListener`
  	buildSegDragListener: function(seg) {
  		var _this = this;
  		var view = this.view;
  		var calendar = view.calendar;
  		var el = seg.el;
  		var event = seg.event;
  		var isDragging;
  		var mouseFollower; // A clone of the original element that will move with the mouse
  		var dropLocation; // zoned event date properties
  
  		if (this.segDragListener) {
  			return this.segDragListener;
  		}
  
  		// Tracks mouse movement over the *view's* coordinate map. Allows dragging and dropping between subcomponents
  		// of the view.
  		var dragListener = this.segDragListener = new HitDragListener(view, {
  			scroll: view.opt('dragScroll'),
  			subjectEl: el,
  			subjectCenter: true,
  			interactionStart: function(ev) {
  				seg.component = _this; // for renderDrag
  				isDragging = false;
  				mouseFollower = new MouseFollower(seg.el, {
  					additionalClass: 'fc-dragging',
  					parentEl: view.el,
  					opacity: dragListener.isTouch ? null : view.opt('dragOpacity'),
  					revertDuration: view.opt('dragRevertDuration'),
  					zIndex: 2 // one above the .fc-view
  				});
  				mouseFollower.hide(); // don't show until we know this is a real drag
  				mouseFollower.start(ev);
  			},
  			dragStart: function(ev) {
  				if (dragListener.isTouch && !view.isEventSelected(event)) {
  					// if not previously selected, will fire after a delay. then, select the event
  					view.selectEvent(event);
  				}
  				isDragging = true;
  				_this.handleSegMouseout(seg, ev); // ensure a mouseout on the manipulated event has been reported
  				_this.segDragStart(seg, ev);
  				view.hideEvent(event); // hide all event segments. our mouseFollower will take over
  			},
  			hitOver: function(hit, isOrig, origHit) {
  				var dragHelperEls;
  
  				// starting hit could be forced (DayGrid.limit)
  				if (seg.hit) {
  					origHit = seg.hit;
  				}
  
  				// since we are querying the parent view, might not belong to this grid
  				dropLocation = _this.computeEventDrop(
  					origHit.component.getHitSpan(origHit),
  					hit.component.getHitSpan(hit),
  					event
  				);
  
  				if (dropLocation && !calendar.isEventSpanAllowed(_this.eventToSpan(dropLocation), event)) {
  					disableCursor();
  					dropLocation = null;
  				}
  
  				// if a valid drop location, have the subclass render a visual indication
  				if (dropLocation && (dragHelperEls = view.renderDrag(dropLocation, seg))) {
  
  					dragHelperEls.addClass('fc-dragging');
  					if (!dragListener.isTouch) {
  						_this.applyDragOpacity(dragHelperEls);
  					}
  
  					mouseFollower.hide(); // if the subclass is already using a mock event "helper", hide our own
  				}
  				else {
  					mouseFollower.show(); // otherwise, have the helper follow the mouse (no snapping)
  				}
  
  				if (isOrig) {
  					dropLocation = null; // needs to have moved hits to be a valid drop
  				}
  			},
  			hitOut: function() { // called before mouse moves to a different hit OR moved out of all hits
  				view.unrenderDrag(); // unrender whatever was done in renderDrag
  				mouseFollower.show(); // show in case we are moving out of all hits
  				dropLocation = null;
  			},
  			hitDone: function() { // Called after a hitOut OR before a dragEnd
  				enableCursor();
  			},
  			interactionEnd: function(ev) {
  				delete seg.component; // prevent side effects
  
  				// do revert animation if hasn't changed. calls a callback when finished (whether animation or not)
  				mouseFollower.stop(!dropLocation, function() {
  					if (isDragging) {
  						view.unrenderDrag();
  						view.showEvent(event);
  						_this.segDragStop(seg, ev);
  					}
  					if (dropLocation) {
  						view.reportEventDrop(event, dropLocation, this.largeUnit, el, ev);
  					}
  				});
  				_this.segDragListener = null;
  			}
  		});
  
  		return dragListener;
  	},
  
  
  	// seg isn't draggable, but let's use a generic DragListener
  	// simply for the delay, so it can be selected.
  	// Has side effect of setting/unsetting `segDragListener`
  	buildSegSelectListener: function(seg) {
  		var _this = this;
  		var view = this.view;
  		var event = seg.event;
  
  		if (this.segDragListener) {
  			return this.segDragListener;
  		}
  
  		var dragListener = this.segDragListener = new DragListener({
  			dragStart: function(ev) {
  				if (dragListener.isTouch && !view.isEventSelected(event)) {
  					// if not previously selected, will fire after a delay. then, select the event
  					view.selectEvent(event);
  				}
  			},
  			interactionEnd: function(ev) {
  				_this.segDragListener = null;
  			}
  		});
  
  		return dragListener;
  	},
  
  
  	// Called before event segment dragging starts
  	segDragStart: function(seg, ev) {
  		this.isDraggingSeg = true;
  		this.view.trigger('eventDragStart', seg.el[0], seg.event, ev, {}); // last argument is jqui dummy
  	},
  
  
  	// Called after event segment dragging stops
  	segDragStop: function(seg, ev) {
  		this.isDraggingSeg = false;
  		this.view.trigger('eventDragStop', seg.el[0], seg.event, ev, {}); // last argument is jqui dummy
  	},
  
  
  	// Given the spans an event drag began, and the span event was dropped, calculates the new zoned start/end/allDay
  	// values for the event. Subclasses may override and set additional properties to be used by renderDrag.
  	// A falsy returned value indicates an invalid drop.
  	// DOES NOT consider overlap/constraint.
  	computeEventDrop: function(startSpan, endSpan, event) {
  		var calendar = this.view.calendar;
  		var dragStart = startSpan.start;
  		var dragEnd = endSpan.start;
  		var delta;
  		var dropLocation; // zoned event date properties
  
  		if (dragStart.hasTime() === dragEnd.hasTime()) {
  			delta = this.diffDates(dragEnd, dragStart);
  
  			// if an all-day event was in a timed area and it was dragged to a different time,
  			// guarantee an end and adjust start/end to have times
  			if (event.allDay && durationHasTime(delta)) {
  				dropLocation = {
  					start: event.start.clone(),
  					end: calendar.getEventEnd(event), // will be an ambig day
  					allDay: false // for normalizeEventTimes
  				};
  				calendar.normalizeEventTimes(dropLocation);
  			}
  			// othewise, work off existing values
  			else {
  				dropLocation = pluckEventDateProps(event);
  			}
  
  			dropLocation.start.add(delta);
  			if (dropLocation.end) {
  				dropLocation.end.add(delta);
  			}
  		}
  		else {
  			// if switching from day <-> timed, start should be reset to the dropped date, and the end cleared
  			dropLocation = {
  				start: dragEnd.clone(),
  				end: null, // end should be cleared
  				allDay: !dragEnd.hasTime()
  			};
  		}
  
  		return dropLocation;
  	},
  
  
  	// Utility for apply dragOpacity to a jQuery set
  	applyDragOpacity: function(els) {
  		var opacity = this.view.opt('dragOpacity');
  
  		if (opacity != null) {
  			els.css('opacity', opacity);
  		}
  	},
  
  
  	/* External Element Dragging
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Called when a jQuery UI drag is initiated anywhere in the DOM
  	externalDragStart: function(ev, ui) {
  		var view = this.view;
  		var el;
  		var accept;
  
  		if (view.opt('droppable')) { // only listen if this setting is on
  			el = $((ui ? ui.item : null) || ev.target);
  
  			// Test that the dragged element passes the dropAccept selector or filter function.
  			// FYI, the default is "*" (matches all)
  			accept = view.opt('dropAccept');
  			if ($.isFunction(accept) ? accept.call(el[0], el) : el.is(accept)) {
  				if (!this.isDraggingExternal) { // prevent double-listening if fired twice
  					this.listenToExternalDrag(el, ev, ui);
  				}
  			}
  		}
  	},
  
  
  	// Called when a jQuery UI drag starts and it needs to be monitored for dropping
  	listenToExternalDrag: function(el, ev, ui) {
  		var _this = this;
  		var calendar = this.view.calendar;
  		var meta = getDraggedElMeta(el); // extra data about event drop, including possible event to create
  		var dropLocation; // a null value signals an unsuccessful drag
  
  		// listener that tracks mouse movement over date-associated pixel regions
  		var dragListener = _this.externalDragListener = new HitDragListener(this, {
  			interactionStart: function() {
  				_this.isDraggingExternal = true;
  			},
  			hitOver: function(hit) {
  				dropLocation = _this.computeExternalDrop(
  					hit.component.getHitSpan(hit), // since we are querying the parent view, might not belong to this grid
  					meta
  				);
  
  				if ( // invalid hit?
  					dropLocation &&
  					!calendar.isExternalSpanAllowed(_this.eventToSpan(dropLocation), dropLocation, meta.eventProps)
  				) {
  					disableCursor();
  					dropLocation = null;
  				}
  
  				if (dropLocation) {
  					_this.renderDrag(dropLocation); // called without a seg parameter
  				}
  			},
  			hitOut: function() {
  				dropLocation = null; // signal unsuccessful
  			},
  			hitDone: function() { // Called after a hitOut OR before a dragEnd
  				enableCursor();
  				_this.unrenderDrag();
  			},
  			interactionEnd: function(ev) {
  				if (dropLocation) { // element was dropped on a valid hit
  					_this.view.reportExternalDrop(meta, dropLocation, el, ev, ui);
  				}
  				_this.isDraggingExternal = false;
  				_this.externalDragListener = null;
  			}
  		});
  
  		dragListener.startDrag(ev); // start listening immediately
  	},
  
  
  	// Given a hit to be dropped upon, and misc data associated with the jqui drag (guaranteed to be a plain object),
  	// returns the zoned start/end dates for the event that would result from the hypothetical drop. end might be null.
  	// Returning a null value signals an invalid drop hit.
  	// DOES NOT consider overlap/constraint.
  	computeExternalDrop: function(span, meta) {
  		var calendar = this.view.calendar;
  		var dropLocation = {
  			start: calendar.applyTimezone(span.start), // simulate a zoned event start date
  			end: null
  		};
  
  		// if dropped on an all-day span, and element's metadata specified a time, set it
  		if (meta.startTime && !dropLocation.start.hasTime()) {
  			dropLocation.start.time(meta.startTime);
  		}
  
  		if (meta.duration) {
  			dropLocation.end = dropLocation.start.clone().add(meta.duration);
  		}
  
  		return dropLocation;
  	},
  
  
  
  	/* Drag Rendering (for both events and an external elements)
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders a visual indication of an event or external element being dragged.
  	// `dropLocation` contains hypothetical start/end/allDay values the event would have if dropped. end can be null.
  	// `seg` is the internal segment object that is being dragged. If dragging an external element, `seg` is null.
  	// A truthy returned value indicates this method has rendered a helper element.
  	// Must return elements used for any mock events.
  	renderDrag: function(dropLocation, seg) {
  		// subclasses must implement
  	},
  
  
  	// Unrenders a visual indication of an event or external element being dragged
  	unrenderDrag: function() {
  		// subclasses must implement
  	},
  
  
  	/* Resizing
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Creates a listener that tracks the user as they resize an event segment.
  	// Generic enough to work with any type of Grid.
  	buildSegResizeListener: function(seg, isStart) {
  		var _this = this;
  		var view = this.view;
  		var calendar = view.calendar;
  		var el = seg.el;
  		var event = seg.event;
  		var eventEnd = calendar.getEventEnd(event);
  		var isDragging;
  		var resizeLocation; // zoned event date properties. falsy if invalid resize
  
  		// Tracks mouse movement over the *grid's* coordinate map
  		var dragListener = this.segResizeListener = new HitDragListener(this, {
  			scroll: view.opt('dragScroll'),
  			subjectEl: el,
  			interactionStart: function() {
  				isDragging = false;
  			},
  			dragStart: function(ev) {
  				isDragging = true;
  				_this.handleSegMouseout(seg, ev); // ensure a mouseout on the manipulated event has been reported
  				_this.segResizeStart(seg, ev);
  			},
  			hitOver: function(hit, isOrig, origHit) {
  				var origHitSpan = _this.getHitSpan(origHit);
  				var hitSpan = _this.getHitSpan(hit);
  
  				resizeLocation = isStart ?
  					_this.computeEventStartResize(origHitSpan, hitSpan, event) :
  					_this.computeEventEndResize(origHitSpan, hitSpan, event);
  
  				if (resizeLocation) {
  					if (!calendar.isEventSpanAllowed(_this.eventToSpan(resizeLocation), event)) {
  						disableCursor();
  						resizeLocation = null;
  					}
  					// no change? (FYI, event dates might have zones)
  					else if (
  						resizeLocation.start.isSame(event.start.clone().stripZone()) &&
  						resizeLocation.end.isSame(eventEnd.clone().stripZone())
  					) {
  						resizeLocation = null;
  					}
  				}
  
  				if (resizeLocation) {
  					view.hideEvent(event);
  					_this.renderEventResize(resizeLocation, seg);
  				}
  			},
  			hitOut: function() { // called before mouse moves to a different hit OR moved out of all hits
  				resizeLocation = null;
  			},
  			hitDone: function() { // resets the rendering to show the original event
  				_this.unrenderEventResize();
  				view.showEvent(event);
  				enableCursor();
  			},
  			interactionEnd: function(ev) {
  				if (isDragging) {
  					_this.segResizeStop(seg, ev);
  				}
  				if (resizeLocation) { // valid date to resize to?
  					view.reportEventResize(event, resizeLocation, this.largeUnit, el, ev);
  				}
  				_this.segResizeListener = null;
  			}
  		});
  
  		return dragListener;
  	},
  
  
  	// Called before event segment resizing starts
  	segResizeStart: function(seg, ev) {
  		this.isResizingSeg = true;
  		this.view.trigger('eventResizeStart', seg.el[0], seg.event, ev, {}); // last argument is jqui dummy
  	},
  
  
  	// Called after event segment resizing stops
  	segResizeStop: function(seg, ev) {
  		this.isResizingSeg = false;
  		this.view.trigger('eventResizeStop', seg.el[0], seg.event, ev, {}); // last argument is jqui dummy
  	},
  
  
  	// Returns new date-information for an event segment being resized from its start
  	computeEventStartResize: function(startSpan, endSpan, event) {
  		return this.computeEventResize('start', startSpan, endSpan, event);
  	},
  
  
  	// Returns new date-information for an event segment being resized from its end
  	computeEventEndResize: function(startSpan, endSpan, event) {
  		return this.computeEventResize('end', startSpan, endSpan, event);
  	},
  
  
  	// Returns new zoned date information for an event segment being resized from its start OR end
  	// `type` is either 'start' or 'end'.
  	// DOES NOT consider overlap/constraint.
  	computeEventResize: function(type, startSpan, endSpan, event) {
  		var calendar = this.view.calendar;
  		var delta = this.diffDates(endSpan[type], startSpan[type]);
  		var resizeLocation; // zoned event date properties
  		var defaultDuration;
  
  		// build original values to work from, guaranteeing a start and end
  		resizeLocation = {
  			start: event.start.clone(),
  			end: calendar.getEventEnd(event),
  			allDay: event.allDay
  		};
  
  		// if an all-day event was in a timed area and was resized to a time, adjust start/end to have times
  		if (resizeLocation.allDay && durationHasTime(delta)) {
  			resizeLocation.allDay = false;
  			calendar.normalizeEventTimes(resizeLocation);
  		}
  
  		resizeLocation[type].add(delta); // apply delta to start or end
  
  		// if the event was compressed too small, find a new reasonable duration for it
  		if (!resizeLocation.start.isBefore(resizeLocation.end)) {
  
  			defaultDuration =
  				this.minResizeDuration || // TODO: hack
  				(event.allDay ?
  					calendar.defaultAllDayEventDuration :
  					calendar.defaultTimedEventDuration);
  
  			if (type == 'start') { // resizing the start?
  				resizeLocation.start = resizeLocation.end.clone().subtract(defaultDuration);
  			}
  			else { // resizing the end?
  				resizeLocation.end = resizeLocation.start.clone().add(defaultDuration);
  			}
  		}
  
  		return resizeLocation;
  	},
  
  
  	// Renders a visual indication of an event being resized.
  	// `range` has the updated dates of the event. `seg` is the original segment object involved in the drag.
  	// Must return elements used for any mock events.
  	renderEventResize: function(range, seg) {
  		// subclasses must implement
  	},
  
  
  	// Unrenders a visual indication of an event being resized.
  	unrenderEventResize: function() {
  		// subclasses must implement
  	},
  
  
  	/* Rendering Utils
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Compute the text that should be displayed on an event's element.
  	// `range` can be the Event object itself, or something range-like, with at least a `start`.
  	// If event times are disabled, or the event has no time, will return a blank string.
  	// If not specified, formatStr will default to the eventTimeFormat setting,
  	// and displayEnd will default to the displayEventEnd setting.
  	getEventTimeText: function(range, formatStr, displayEnd) {
  
  		if (formatStr == null) {
  			formatStr = this.eventTimeFormat;
  		}
  
  		if (displayEnd == null) {
  			displayEnd = this.displayEventEnd;
  		}
  
  		if (this.displayEventTime && range.start.hasTime()) {
  			if (displayEnd && range.end) {
  				return this.view.formatRange(range, formatStr);
  			}
  			else {
  				return range.start.format(formatStr);
  			}
  		}
  
  		return '';
  	},
  
  
  	// Generic utility for generating the HTML classNames for an event segment's element
  	getSegClasses: function(seg, isDraggable, isResizable) {
  		var view = this.view;
  		var classes = [
  			'fc-event',
  			seg.isStart ? 'fc-start' : 'fc-not-start',
  			seg.isEnd ? 'fc-end' : 'fc-not-end'
  		].concat(this.getSegCustomClasses(seg));
  
  		if (isDraggable) {
  			classes.push('fc-draggable');
  		}
  		if (isResizable) {
  			classes.push('fc-resizable');
  		}
  
  		// event is currently selected? attach a className.
  		if (view.isEventSelected(seg.event)) {
  			classes.push('fc-selected');
  		}
  
  		return classes;
  	},
  
  
  	// List of classes that were defined by the caller of the API in some way
  	getSegCustomClasses: function(seg) {
  		var event = seg.event;
  
  		return [].concat(
  			event.className, // guaranteed to be an array
  			event.source ? event.source.className : []
  		);
  	},
  
  
  	// Utility for generating event skin-related CSS properties
  	getSegSkinCss: function(seg) {
  		return {
  			'background-color': this.getSegBackgroundColor(seg),
  			'border-color': this.getSegBorderColor(seg),
  			color: this.getSegTextColor(seg)
  		};
  	},
  
  
  	// Queries for caller-specified color, then falls back to default
  	getSegBackgroundColor: function(seg) {
  		return seg.event.backgroundColor ||
  			seg.event.color ||
  			this.getSegDefaultBackgroundColor(seg);
  	},
  
  
  	getSegDefaultBackgroundColor: function(seg) {
  		var source = seg.event.source || {};
  
  		return source.backgroundColor ||
  			source.color ||
  			this.view.opt('eventBackgroundColor') ||
  			this.view.opt('eventColor');
  	},
  
  
  	// Queries for caller-specified color, then falls back to default
  	getSegBorderColor: function(seg) {
  		return seg.event.borderColor ||
  			seg.event.color ||
  			this.getSegDefaultBorderColor(seg);
  	},
  
  
  	getSegDefaultBorderColor: function(seg) {
  		var source = seg.event.source || {};
  
  		return source.borderColor ||
  			source.color ||
  			this.view.opt('eventBorderColor') ||
  			this.view.opt('eventColor');
  	},
  
  
  	// Queries for caller-specified color, then falls back to default
  	getSegTextColor: function(seg) {
  		return seg.event.textColor ||
  			this.getSegDefaultTextColor(seg);
  	},
  
  
  	getSegDefaultTextColor: function(seg) {
  		var source = seg.event.source || {};
  
  		return source.textColor ||
  			this.view.opt('eventTextColor');
  	},
  
  
  	/* Converting events -> eventRange -> eventSpan -> eventSegs
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Generates an array of segments for the given single event
  	// Can accept an event "location" as well (which only has start/end and no allDay)
  	eventToSegs: function(event) {
  		return this.eventsToSegs([ event ]);
  	},
  
  
  	eventToSpan: function(event) {
  		return this.eventToSpans(event)[0];
  	},
  
  
  	// Generates spans (always unzoned) for the given event.
  	// Does not do any inverting for inverse-background events.
  	// Can accept an event "location" as well (which only has start/end and no allDay)
  	eventToSpans: function(event) {
  		var range = this.eventToRange(event);
  		return this.eventRangeToSpans(range, event);
  	},
  
  
  
  	// Converts an array of event objects into an array of event segment objects.
  	// A custom `segSliceFunc` may be given for arbitrarily slicing up events.
  	// Doesn't guarantee an order for the resulting array.
  	eventsToSegs: function(allEvents, segSliceFunc) {
  		var _this = this;
  		var eventsById = groupEventsById(allEvents);
  		var segs = [];
  
  		$.each(eventsById, function(id, events) {
  			var ranges = [];
  			var i;
  
  			for (i = 0; i < events.length; i++) {
  				ranges.push(_this.eventToRange(events[i]));
  			}
  
  			// inverse-background events (utilize only the first event in calculations)
  			if (isInverseBgEvent(events[0])) {
  				ranges = _this.invertRanges(ranges);
  
  				for (i = 0; i < ranges.length; i++) {
  					segs.push.apply(segs, // append to
  						_this.eventRangeToSegs(ranges[i], events[0], segSliceFunc));
  				}
  			}
  			// normal event ranges
  			else {
  				for (i = 0; i < ranges.length; i++) {
  					segs.push.apply(segs, // append to
  						_this.eventRangeToSegs(ranges[i], events[i], segSliceFunc));
  				}
  			}
  		});
  
  		return segs;
  	},
  
  
  	// Generates the unzoned start/end dates an event appears to occupy
  	// Can accept an event "location" as well (which only has start/end and no allDay)
  	eventToRange: function(event) {
  		var calendar = this.view.calendar;
  		var start = event.start.clone().stripZone();
  		var end = (
  				event.end ?
  					event.end.clone() :
  					// derive the end from the start and allDay. compute allDay if necessary
  					calendar.getDefaultEventEnd(
  						event.allDay != null ?
  							event.allDay :
  							!event.start.hasTime(),
  						event.start
  					)
  			).stripZone();
  
  		// hack: dynamic locale change forgets to upate stored event localed
  		calendar.localizeMoment(start);
  		calendar.localizeMoment(end);
  
  		return { start: start, end: end };
  	},
  
  
  	// Given an event's range (unzoned start/end), and the event itself,
  	// slice into segments (using the segSliceFunc function if specified)
  	eventRangeToSegs: function(range, event, segSliceFunc) {
  		var spans = this.eventRangeToSpans(range, event);
  		var segs = [];
  		var i;
  
  		for (i = 0; i < spans.length; i++) {
  			segs.push.apply(segs, // append to
  				this.eventSpanToSegs(spans[i], event, segSliceFunc));
  		}
  
  		return segs;
  	},
  
  
  	// Given an event's unzoned date range, return an array of "span" objects.
  	// Subclasses can override.
  	eventRangeToSpans: function(range, event) {
  		return [ $.extend({}, range) ]; // copy into a single-item array
  	},
  
  
  	// Given an event's span (unzoned start/end and other misc data), and the event itself,
  	// slices into segments and attaches event-derived properties to them.
  	eventSpanToSegs: function(span, event, segSliceFunc) {
  		var segs = segSliceFunc ? segSliceFunc(span) : this.spanToSegs(span);
  		var i, seg;
  
  		for (i = 0; i < segs.length; i++) {
  			seg = segs[i];
  			seg.event = event;
  			seg.eventStartMS = +span.start; // TODO: not the best name after making spans unzoned
  			seg.eventDurationMS = span.end - span.start;
  		}
  
  		return segs;
  	},
  
  
  	// Produces a new array of range objects that will cover all the time NOT covered by the given ranges.
  	// SIDE EFFECT: will mutate the given array and will use its date references.
  	invertRanges: function(ranges) {
  		var view = this.view;
  		var viewStart = view.start.clone(); // need a copy
  		var viewEnd = view.end.clone(); // need a copy
  		var inverseRanges = [];
  		var start = viewStart; // the end of the previous range. the start of the new range
  		var i, range;
  
  		// ranges need to be in order. required for our date-walking algorithm
  		ranges.sort(compareRanges);
  
  		for (i = 0; i < ranges.length; i++) {
  			range = ranges[i];
  
  			// add the span of time before the event (if there is any)
  			if (range.start > start) { // compare millisecond time (skip any ambig logic)
  				inverseRanges.push({
  					start: start,
  					end: range.start
  				});
  			}
  
  			start = range.end;
  		}
  
  		// add the span of time after the last event (if there is any)
  		if (start < viewEnd) { // compare millisecond time (skip any ambig logic)
  			inverseRanges.push({
  				start: start,
  				end: viewEnd
  			});
  		}
  
  		return inverseRanges;
  	},
  
  
  	sortEventSegs: function(segs) {
  		segs.sort(proxy(this, 'compareEventSegs'));
  	},
  
  
  	// A cmp function for determining which segments should take visual priority
  	compareEventSegs: function(seg1, seg2) {
  		return seg1.eventStartMS - seg2.eventStartMS || // earlier events go first
  			seg2.eventDurationMS - seg1.eventDurationMS || // tie? longer events go first
  			seg2.event.allDay - seg1.event.allDay || // tie? put all-day events first (booleans cast to 0/1)
  			compareByFieldSpecs(seg1.event, seg2.event, this.view.eventOrderSpecs);
  	}
  
  });
  
  
  /* Utilities
  ----------------------------------------------------------------------------------------------------------------------*/
  
  
  function pluckEventDateProps(event) {
  	return {
  		start: event.start.clone(),
  		end: event.end ? event.end.clone() : null,
  		allDay: event.allDay // keep it the same
  	};
  }
  FC.pluckEventDateProps = pluckEventDateProps;
  
  
  function isBgEvent(event) { // returns true if background OR inverse-background
  	var rendering = getEventRendering(event);
  	return rendering === 'background' || rendering === 'inverse-background';
  }
  FC.isBgEvent = isBgEvent; // export
  
  
  function isInverseBgEvent(event) {
  	return getEventRendering(event) === 'inverse-background';
  }
  
  
  function getEventRendering(event) {
  	return firstDefined((event.source || {}).rendering, event.rendering);
  }
  
  
  function groupEventsById(events) {
  	var eventsById = {};
  	var i, event;
  
  	for (i = 0; i < events.length; i++) {
  		event = events[i];
  		(eventsById[event._id] || (eventsById[event._id] = [])).push(event);
  	}
  
  	return eventsById;
  }
  
  
  // A cmp function for determining which non-inverted "ranges" (see above) happen earlier
  function compareRanges(range1, range2) {
  	return range1.start - range2.start; // earlier ranges go first
  }
  
  
  /* External-Dragging-Element Data
  ----------------------------------------------------------------------------------------------------------------------*/
  
  // Require all HTML5 data-* attributes used by FullCalendar to have this prefix.
  // A value of '' will query attributes like data-event. A value of 'fc' will query attributes like data-fc-event.
  FC.dataAttrPrefix = '';
  
  // Given a jQuery element that might represent a dragged FullCalendar event, returns an intermediate data structure
  // to be used for Event Object creation.
  // A defined `.eventProps`, even when empty, indicates that an event should be created.
  function getDraggedElMeta(el) {
  	var prefix = FC.dataAttrPrefix;
  	var eventProps; // properties for creating the event, not related to date/time
  	var startTime; // a Duration
  	var duration;
  	var stick;
  
  	if (prefix) { prefix += '-'; }
  	eventProps = el.data(prefix + 'event') || null;
  
  	if (eventProps) {
  		if (typeof eventProps === 'object') {
  			eventProps = $.extend({}, eventProps); // make a copy
  		}
  		else { // something like 1 or true. still signal event creation
  			eventProps = {};
  		}
  
  		// pluck special-cased date/time properties
  		startTime = eventProps.start;
  		if (startTime == null) { startTime = eventProps.time; } // accept 'time' as well
  		duration = eventProps.duration;
  		stick = eventProps.stick;
  		delete eventProps.start;
  		delete eventProps.time;
  		delete eventProps.duration;
  		delete eventProps.stick;
  	}
  
  	// fallback to standalone attribute values for each of the date/time properties
  	if (startTime == null) { startTime = el.data(prefix + 'start'); }
  	if (startTime == null) { startTime = el.data(prefix + 'time'); } // accept 'time' as well
  	if (duration == null) { duration = el.data(prefix + 'duration'); }
  	if (stick == null) { stick = el.data(prefix + 'stick'); }
  
  	// massage into correct data types
  	startTime = startTime != null ? moment.duration(startTime) : null;
  	duration = duration != null ? moment.duration(duration) : null;
  	stick = Boolean(stick);
  
  	return { eventProps: eventProps, startTime: startTime, duration: duration, stick: stick };
  }
  
  
  ;;
  
  /*
  A set of rendering and date-related methods for a visual component comprised of one or more rows of day columns.
  Prerequisite: the object being mixed into needs to be a *Grid*
  */
  var DayTableMixin = FC.DayTableMixin = {
  
  	breakOnWeeks: false, // should create a new row for each week?
  	dayDates: null, // whole-day dates for each column. left to right
  	dayIndices: null, // for each day from start, the offset
  	daysPerRow: null,
  	rowCnt: null,
  	colCnt: null,
  	colHeadFormat: null,
  
  
  	// Populates internal variables used for date calculation and rendering
  	updateDayTable: function() {
  		var view = this.view;
  		var date = this.start.clone();
  		var dayIndex = -1;
  		var dayIndices = [];
  		var dayDates = [];
  		var daysPerRow;
  		var firstDay;
  		var rowCnt;
  
  		while (date.isBefore(this.end)) { // loop each day from start to end
  			if (view.isHiddenDay(date)) {
  				dayIndices.push(dayIndex + 0.5); // mark that it's between indices
  			}
  			else {
  				dayIndex++;
  				dayIndices.push(dayIndex);
  				dayDates.push(date.clone());
  			}
  			date.add(1, 'days');
  		}
  
  		if (this.breakOnWeeks) {
  			// count columns until the day-of-week repeats
  			firstDay = dayDates[0].day();
  			for (daysPerRow = 1; daysPerRow < dayDates.length; daysPerRow++) {
  				if (dayDates[daysPerRow].day() == firstDay) {
  					break;
  				}
  			}
  			rowCnt = Math.ceil(dayDates.length / daysPerRow);
  		}
  		else {
  			rowCnt = 1;
  			daysPerRow = dayDates.length;
  		}
  
  		this.dayDates = dayDates;
  		this.dayIndices = dayIndices;
  		this.daysPerRow = daysPerRow;
  		this.rowCnt = rowCnt;
  
  		this.updateDayTableCols();
  	},
  
  
  	// Computes and assigned the colCnt property and updates any options that may be computed from it
  	updateDayTableCols: function() {
  		this.colCnt = this.computeColCnt();
  		this.colHeadFormat = this.view.opt('columnFormat') || this.computeColHeadFormat();
  	},
  
  
  	// Determines how many columns there should be in the table
  	computeColCnt: function() {
  		return this.daysPerRow;
  	},
  
  
  	// Computes the ambiguously-timed moment for the given cell
  	getCellDate: function(row, col) {
  		return this.dayDates[
  				this.getCellDayIndex(row, col)
  			].clone();
  	},
  
  
  	// Computes the ambiguously-timed date range for the given cell
  	getCellRange: function(row, col) {
  		var start = this.getCellDate(row, col);
  		var end = start.clone().add(1, 'days');
  
  		return { start: start, end: end };
  	},
  
  
  	// Returns the number of day cells, chronologically, from the first of the grid (0-based)
  	getCellDayIndex: function(row, col) {
  		return row * this.daysPerRow + this.getColDayIndex(col);
  	},
  
  
  	// Returns the numner of day cells, chronologically, from the first cell in *any given row*
  	getColDayIndex: function(col) {
  		if (this.isRTL) {
  			return this.colCnt - 1 - col;
  		}
  		else {
  			return col;
  		}
  	},
  
  
  	// Given a date, returns its chronolocial cell-index from the first cell of the grid.
  	// If the date lies between cells (because of hiddenDays), returns a floating-point value between offsets.
  	// If before the first offset, returns a negative number.
  	// If after the last offset, returns an offset past the last cell offset.
  	// Only works for *start* dates of cells. Will not work for exclusive end dates for cells.
  	getDateDayIndex: function(date) {
  		var dayIndices = this.dayIndices;
  		var dayOffset = date.diff(this.start, 'days');
  
  		if (dayOffset < 0) {
  			return dayIndices[0] - 1;
  		}
  		else if (dayOffset >= dayIndices.length) {
  			return dayIndices[dayIndices.length - 1] + 1;
  		}
  		else {
  			return dayIndices[dayOffset];
  		}
  	},
  
  
  	/* Options
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Computes a default column header formatting string if `colFormat` is not explicitly defined
  	computeColHeadFormat: function() {
  		// if more than one week row, or if there are a lot of columns with not much space,
  		// put just the day numbers will be in each cell
  		if (this.rowCnt > 1 || this.colCnt > 10) {
  			return 'ddd'; // "Sat"
  		}
  		// multiple days, so full single date string WON'T be in title text
  		else if (this.colCnt > 1) {
  			return this.view.opt('dayOfMonthFormat'); // "Sat 12/10"
  		}
  		// single day, so full single date string will probably be in title text
  		else {
  			return 'dddd'; // "Saturday"
  		}
  	},
  
  
  	/* Slicing
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Slices up a date range into a segment for every week-row it intersects with
  	sliceRangeByRow: function(range) {
  		var daysPerRow = this.daysPerRow;
  		var normalRange = this.view.computeDayRange(range); // make whole-day range, considering nextDayThreshold
  		var rangeFirst = this.getDateDayIndex(normalRange.start); // inclusive first index
  		var rangeLast = this.getDateDayIndex(normalRange.end.clone().subtract(1, 'days')); // inclusive last index
  		var segs = [];
  		var row;
  		var rowFirst, rowLast; // inclusive day-index range for current row
  		var segFirst, segLast; // inclusive day-index range for segment
  
  		for (row = 0; row < this.rowCnt; row++) {
  			rowFirst = row * daysPerRow;
  			rowLast = rowFirst + daysPerRow - 1;
  
  			// intersect segment's offset range with the row's
  			segFirst = Math.max(rangeFirst, rowFirst);
  			segLast = Math.min(rangeLast, rowLast);
  
  			// deal with in-between indices
  			segFirst = Math.ceil(segFirst); // in-between starts round to next cell
  			segLast = Math.floor(segLast); // in-between ends round to prev cell
  
  			if (segFirst <= segLast) { // was there any intersection with the current row?
  				segs.push({
  					row: row,
  
  					// normalize to start of row
  					firstRowDayIndex: segFirst - rowFirst,
  					lastRowDayIndex: segLast - rowFirst,
  
  					// must be matching integers to be the segment's start/end
  					isStart: segFirst === rangeFirst,
  					isEnd: segLast === rangeLast
  				});
  			}
  		}
  
  		return segs;
  	},
  
  
  	// Slices up a date range into a segment for every day-cell it intersects with.
  	// TODO: make more DRY with sliceRangeByRow somehow.
  	sliceRangeByDay: function(range) {
  		var daysPerRow = this.daysPerRow;
  		var normalRange = this.view.computeDayRange(range); // make whole-day range, considering nextDayThreshold
  		var rangeFirst = this.getDateDayIndex(normalRange.start); // inclusive first index
  		var rangeLast = this.getDateDayIndex(normalRange.end.clone().subtract(1, 'days')); // inclusive last index
  		var segs = [];
  		var row;
  		var rowFirst, rowLast; // inclusive day-index range for current row
  		var i;
  		var segFirst, segLast; // inclusive day-index range for segment
  
  		for (row = 0; row < this.rowCnt; row++) {
  			rowFirst = row * daysPerRow;
  			rowLast = rowFirst + daysPerRow - 1;
  
  			for (i = rowFirst; i <= rowLast; i++) {
  
  				// intersect segment's offset range with the row's
  				segFirst = Math.max(rangeFirst, i);
  				segLast = Math.min(rangeLast, i);
  
  				// deal with in-between indices
  				segFirst = Math.ceil(segFirst); // in-between starts round to next cell
  				segLast = Math.floor(segLast); // in-between ends round to prev cell
  
  				if (segFirst <= segLast) { // was there any intersection with the current row?
  					segs.push({
  						row: row,
  
  						// normalize to start of row
  						firstRowDayIndex: segFirst - rowFirst,
  						lastRowDayIndex: segLast - rowFirst,
  
  						// must be matching integers to be the segment's start/end
  						isStart: segFirst === rangeFirst,
  						isEnd: segLast === rangeLast
  					});
  				}
  			}
  		}
  
  		return segs;
  	},
  
  
  	/* Header Rendering
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	renderHeadHtml: function() {
  		var view = this.view;
  
  		return '' +
  			'<div class="fc-row ' + view.widgetHeaderClass + '">' +
  				'<table>' +
  					'<thead>' +
  						this.renderHeadTrHtml() +
  					'</thead>' +
  				'</table>' +
  			'</div>';
  	},
  
  
  	renderHeadIntroHtml: function() {
  		return this.renderIntroHtml(); // fall back to generic
  	},
  
  
  	renderHeadTrHtml: function() {
  		return '' +
  			'<tr>' +
  				(this.isRTL ? '' : this.renderHeadIntroHtml()) +
  				this.renderHeadDateCellsHtml() +
  				(this.isRTL ? this.renderHeadIntroHtml() : '') +
  			'</tr>';
  	},
  
  
  	renderHeadDateCellsHtml: function() {
  		var htmls = [];
  		var col, date;
  
  		for (col = 0; col < this.colCnt; col++) {
  			date = this.getCellDate(0, col);
  			htmls.push(this.renderHeadDateCellHtml(date));
  		}
  
  		return htmls.join('');
  	},
  
  
  	// TODO: when internalApiVersion, accept an object for HTML attributes
  	// (colspan should be no different)
  	renderHeadDateCellHtml: function(date, colspan, otherAttrs) {
  		var view = this.view;
  
  		return '' +
  			'<th class="fc-day-header ' + view.widgetHeaderClass + ' fc-' + dayIDs[date.day()] + '"' +
  				(this.rowCnt === 1 ?
  					' data-date="' + date.format('YYYY-MM-DD') + '"' :
  					'') +
  				(colspan > 1 ?
  					' colspan="' + colspan + '"' :
  					'') +
  				(otherAttrs ?
  					' ' + otherAttrs :
  					'') +
  				'>' +
  				// don't make a link if the heading could represent multiple days, or if there's only one day (forceOff)
  				view.buildGotoAnchorHtml(
  					{ date: date, forceOff: this.rowCnt > 1 || this.colCnt === 1 },
  					htmlEscape(date.format(this.colHeadFormat)) // inner HTML
  				) +
  			'</th>';
  	},
  
  
  	/* Background Rendering
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	renderBgTrHtml: function(row) {
  		return '' +
  			'<tr>' +
  				(this.isRTL ? '' : this.renderBgIntroHtml(row)) +
  				this.renderBgCellsHtml(row) +
  				(this.isRTL ? this.renderBgIntroHtml(row) : '') +
  			'</tr>';
  	},
  
  
  	renderBgIntroHtml: function(row) {
  		return this.renderIntroHtml(); // fall back to generic
  	},
  
  
  	renderBgCellsHtml: function(row) {
  		var htmls = [];
  		var col, date;
  
  		for (col = 0; col < this.colCnt; col++) {
  			date = this.getCellDate(row, col);
  			htmls.push(this.renderBgCellHtml(date));
  		}
  
  		return htmls.join('');
  	},
  
  
  	renderBgCellHtml: function(date, otherAttrs) {
  		var view = this.view;
  		var classes = this.getDayClasses(date);
  
  		classes.unshift('fc-day', view.widgetContentClass);
  
  		return '<td class="' + classes.join(' ') + '"' +
  			' data-date="' + date.format('YYYY-MM-DD') + '"' + // if date has a time, won't format it
  			(otherAttrs ?
  				' ' + otherAttrs :
  				'') +
  			'></td>';
  	},
  
  
  	/* Generic
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Generates the default HTML intro for any row. User classes should override
  	renderIntroHtml: function() {
  	},
  
  
  	// TODO: a generic method for dealing with <tr>, RTL, intro
  	// when increment internalApiVersion
  	// wrapTr (scheduler)
  
  
  	/* Utils
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Applies the generic "intro" and "outro" HTML to the given cells.
  	// Intro means the leftmost cell when the calendar is LTR and the rightmost cell when RTL. Vice-versa for outro.
  	bookendCells: function(trEl) {
  		var introHtml = this.renderIntroHtml();
  
  		if (introHtml) {
  			if (this.isRTL) {
  				trEl.append(introHtml);
  			}
  			else {
  				trEl.prepend(introHtml);
  			}
  		}
  	}
  
  };
  
  ;;
  
  /* A component that renders a grid of whole-days that runs horizontally. There can be multiple rows, one per week.
  ----------------------------------------------------------------------------------------------------------------------*/
  
  var DayGrid = FC.DayGrid = Grid.extend(DayTableMixin, {
  
  	numbersVisible: false, // should render a row for day/week numbers? set by outside view. TODO: make internal
  	bottomCoordPadding: 0, // hack for extending the hit area for the last row of the coordinate grid
  
  	rowEls: null, // set of fake row elements
  	cellEls: null, // set of whole-day elements comprising the row's background
  	helperEls: null, // set of cell skeleton elements for rendering the mock event "helper"
  
  	rowCoordCache: null,
  	colCoordCache: null,
  
  
  	// Renders the rows and columns into the component's `this.el`, which should already be assigned.
  	// isRigid determins whether the individual rows should ignore the contents and be a constant height.
  	// Relies on the view's colCnt and rowCnt. In the future, this component should probably be self-sufficient.
  	renderDates: function(isRigid) {
  		var view = this.view;
  		var rowCnt = this.rowCnt;
  		var colCnt = this.colCnt;
  		var html = '';
  		var row;
  		var col;
  
  		for (row = 0; row < rowCnt; row++) {
  			html += this.renderDayRowHtml(row, isRigid);
  		}
  		this.el.html(html);
  
  		this.rowEls = this.el.find('.fc-row');
  		this.cellEls = this.el.find('.fc-day');
  
  		this.rowCoordCache = new CoordCache({
  			els: this.rowEls,
  			isVertical: true
  		});
  		this.colCoordCache = new CoordCache({
  			els: this.cellEls.slice(0, this.colCnt), // only the first row
  			isHorizontal: true
  		});
  
  		// trigger dayRender with each cell's element
  		for (row = 0; row < rowCnt; row++) {
  			for (col = 0; col < colCnt; col++) {
  				view.trigger(
  					'dayRender',
  					null,
  					this.getCellDate(row, col),
  					this.getCellEl(row, col)
  				);
  			}
  		}
  	},
  
  
  	unrenderDates: function() {
  		this.removeSegPopover();
  	},
  
  
  	renderBusinessHours: function() {
  		var segs = this.buildBusinessHourSegs(true); // wholeDay=true
  		this.renderFill('businessHours', segs, 'bgevent');
  	},
  
  
  	unrenderBusinessHours: function() {
  		this.unrenderFill('businessHours');
  	},
  
  
  	// Generates the HTML for a single row, which is a div that wraps a table.
  	// `row` is the row number.
  	renderDayRowHtml: function(row, isRigid) {
  		var view = this.view;
  		var classes = [ 'fc-row', 'fc-week', view.widgetContentClass ];
  
  		if (isRigid) {
  			classes.push('fc-rigid');
  		}
  
  		return '' +
  			'<div class="' + classes.join(' ') + '">' +
  				'<div class="fc-bg">' +
  					'<table>' +
  						this.renderBgTrHtml(row) +
  					'</table>' +
  				'</div>' +
  				'<div class="fc-content-skeleton">' +
  					'<table>' +
  						(this.numbersVisible ?
  							'<thead>' +
  								this.renderNumberTrHtml(row) +
  							'</thead>' :
  							''
  							) +
  					'</table>' +
  				'</div>' +
  			'</div>';
  	},
  
  
  	/* Grid Number Rendering
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	renderNumberTrHtml: function(row) {
  		return '' +
  			'<tr>' +
  				(this.isRTL ? '' : this.renderNumberIntroHtml(row)) +
  				this.renderNumberCellsHtml(row) +
  				(this.isRTL ? this.renderNumberIntroHtml(row) : '') +
  			'</tr>';
  	},
  
  
  	renderNumberIntroHtml: function(row) {
  		return this.renderIntroHtml();
  	},
  
  
  	renderNumberCellsHtml: function(row) {
  		var htmls = [];
  		var col, date;
  
  		for (col = 0; col < this.colCnt; col++) {
  			date = this.getCellDate(row, col);
  			htmls.push(this.renderNumberCellHtml(date));
  		}
  
  		return htmls.join('');
  	},
  
  
  	// Generates the HTML for the <td>s of the "number" row in the DayGrid's content skeleton.
  	// The number row will only exist if either day numbers or week numbers are turned on.
  	renderNumberCellHtml: function(date) {
  		var html = '';
  		var classes;
  		var weekCalcFirstDoW;
  
  		if (!this.view.dayNumbersVisible && !this.view.cellWeekNumbersVisible) {
  			// no numbers in day cell (week number must be along the side)
  			return '<td/>'; //  will create an empty space above events :(
  		}
  
  		classes = this.getDayClasses(date);
  		classes.unshift('fc-day-top');
  
  		if (this.view.cellWeekNumbersVisible) {
  			// To determine the day of week number change under ISO, we cannot
  			// rely on moment.js methods such as firstDayOfWeek() or weekday(),
  			// because they rely on the locale's dow (possibly overridden by
  			// our firstDay option), which may not be Monday. We cannot change
  			// dow, because that would affect the calendar start day as well.
  			if (date._locale._fullCalendar_weekCalc === 'ISO') {
  				weekCalcFirstDoW = 1;  // Monday by ISO 8601 definition
  			}
  			else {
  				weekCalcFirstDoW = date._locale.firstDayOfWeek();
  			}
  		}
  
  		html += '<td class="' + classes.join(' ') + '" data-date="' + date.format() + '">';
  
  		if (this.view.cellWeekNumbersVisible && (date.day() == weekCalcFirstDoW)) {
  			html += this.view.buildGotoAnchorHtml(
  				{ date: date, type: 'week' },
  				{ 'class': 'fc-week-number' },
  				date.format('w') // inner HTML
  			);
  		}
  
  		if (this.view.dayNumbersVisible) {
  			html += this.view.buildGotoAnchorHtml(
  				date,
  				{ 'class': 'fc-day-number' },
  				date.date() // inner HTML
  			);
  		}
  
  		html += '</td>';
  
  		return html;
  	},
  
  
  	/* Options
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Computes a default event time formatting string if `timeFormat` is not explicitly defined
  	computeEventTimeFormat: function() {
  		return this.view.opt('extraSmallTimeFormat'); // like "6p" or "6:30p"
  	},
  
  
  	// Computes a default `displayEventEnd` value if one is not expliclty defined
  	computeDisplayEventEnd: function() {
  		return this.colCnt == 1; // we'll likely have space if there's only one day
  	},
  
  
  	/* Dates
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	rangeUpdated: function() {
  		this.updateDayTable();
  	},
  
  
  	// Slices up the given span (unzoned start/end with other misc data) into an array of segments
  	spanToSegs: function(span) {
  		var segs = this.sliceRangeByRow(span);
  		var i, seg;
  
  		for (i = 0; i < segs.length; i++) {
  			seg = segs[i];
  			if (this.isRTL) {
  				seg.leftCol = this.daysPerRow - 1 - seg.lastRowDayIndex;
  				seg.rightCol = this.daysPerRow - 1 - seg.firstRowDayIndex;
  			}
  			else {
  				seg.leftCol = seg.firstRowDayIndex;
  				seg.rightCol = seg.lastRowDayIndex;
  			}
  		}
  
  		return segs;
  	},
  
  
  	/* Hit System
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	prepareHits: function() {
  		this.colCoordCache.build();
  		this.rowCoordCache.build();
  		this.rowCoordCache.bottoms[this.rowCnt - 1] += this.bottomCoordPadding; // hack
  	},
  
  
  	releaseHits: function() {
  		this.colCoordCache.clear();
  		this.rowCoordCache.clear();
  	},
  
  
  	queryHit: function(leftOffset, topOffset) {
  		if (this.colCoordCache.isLeftInBounds(leftOffset) && this.rowCoordCache.isTopInBounds(topOffset)) {
  			var col = this.colCoordCache.getHorizontalIndex(leftOffset);
  			var row = this.rowCoordCache.getVerticalIndex(topOffset);
  
  			if (row != null && col != null) {
  				return this.getCellHit(row, col);
  			}
  		}
  	},
  
  
  	getHitSpan: function(hit) {
  		return this.getCellRange(hit.row, hit.col);
  	},
  
  
  	getHitEl: function(hit) {
  		return this.getCellEl(hit.row, hit.col);
  	},
  
  
  	/* Cell System
  	------------------------------------------------------------------------------------------------------------------*/
  	// FYI: the first column is the leftmost column, regardless of date
  
  
  	getCellHit: function(row, col) {
  		return {
  			row: row,
  			col: col,
  			component: this, // needed unfortunately :(
  			left: this.colCoordCache.getLeftOffset(col),
  			right: this.colCoordCache.getRightOffset(col),
  			top: this.rowCoordCache.getTopOffset(row),
  			bottom: this.rowCoordCache.getBottomOffset(row)
  		};
  	},
  
  
  	getCellEl: function(row, col) {
  		return this.cellEls.eq(row * this.colCnt + col);
  	},
  
  
  	/* Event Drag Visualization
  	------------------------------------------------------------------------------------------------------------------*/
  	// TODO: move to DayGrid.event, similar to what we did with Grid's drag methods
  
  
  	// Renders a visual indication of an event or external element being dragged.
  	// `eventLocation` has zoned start and end (optional)
  	renderDrag: function(eventLocation, seg) {
  
  		// always render a highlight underneath
  		this.renderHighlight(this.eventToSpan(eventLocation));
  
  		// if a segment from the same calendar but another component is being dragged, render a helper event
  		if (seg && seg.component !== this) {
  			return this.renderEventLocationHelper(eventLocation, seg); // returns mock event elements
  		}
  	},
  
  
  	// Unrenders any visual indication of a hovering event
  	unrenderDrag: function() {
  		this.unrenderHighlight();
  		this.unrenderHelper();
  	},
  
  
  	/* Event Resize Visualization
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders a visual indication of an event being resized
  	renderEventResize: function(eventLocation, seg) {
  		this.renderHighlight(this.eventToSpan(eventLocation));
  		return this.renderEventLocationHelper(eventLocation, seg); // returns mock event elements
  	},
  
  
  	// Unrenders a visual indication of an event being resized
  	unrenderEventResize: function() {
  		this.unrenderHighlight();
  		this.unrenderHelper();
  	},
  
  
  	/* Event Helper
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders a mock "helper" event. `sourceSeg` is the associated internal segment object. It can be null.
  	renderHelper: function(event, sourceSeg) {
  		var helperNodes = [];
  		var segs = this.eventToSegs(event);
  		var rowStructs;
  
  		segs = this.renderFgSegEls(segs); // assigns each seg's el and returns a subset of segs that were rendered
  		rowStructs = this.renderSegRows(segs);
  
  		// inject each new event skeleton into each associated row
  		this.rowEls.each(function(row, rowNode) {
  			var rowEl = $(rowNode); // the .fc-row
  			var skeletonEl = $('<div class="fc-helper-skeleton"><table/></div>'); // will be absolutely positioned
  			var skeletonTop;
  
  			// If there is an original segment, match the top position. Otherwise, put it at the row's top level
  			if (sourceSeg && sourceSeg.row === row) {
  				skeletonTop = sourceSeg.el.position().top;
  			}
  			else {
  				skeletonTop = rowEl.find('.fc-content-skeleton tbody').position().top;
  			}
  
  			skeletonEl.css('top', skeletonTop)
  				.find('table')
  					.append(rowStructs[row].tbodyEl);
  
  			rowEl.append(skeletonEl);
  			helperNodes.push(skeletonEl[0]);
  		});
  
  		return ( // must return the elements rendered
  			this.helperEls = $(helperNodes) // array -> jQuery set
  		);
  	},
  
  
  	// Unrenders any visual indication of a mock helper event
  	unrenderHelper: function() {
  		if (this.helperEls) {
  			this.helperEls.remove();
  			this.helperEls = null;
  		}
  	},
  
  
  	/* Fill System (highlight, background events, business hours)
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	fillSegTag: 'td', // override the default tag name
  
  
  	// Renders a set of rectangles over the given segments of days.
  	// Only returns segments that successfully rendered.
  	renderFill: function(type, segs, className) {
  		var nodes = [];
  		var i, seg;
  		var skeletonEl;
  
  		segs = this.renderFillSegEls(type, segs); // assignes `.el` to each seg. returns successfully rendered segs
  
  		for (i = 0; i < segs.length; i++) {
  			seg = segs[i];
  			skeletonEl = this.renderFillRow(type, seg, className);
  			this.rowEls.eq(seg.row).append(skeletonEl);
  			nodes.push(skeletonEl[0]);
  		}
  
  		this.elsByFill[type] = $(nodes);
  
  		return segs;
  	},
  
  
  	// Generates the HTML needed for one row of a fill. Requires the seg's el to be rendered.
  	renderFillRow: function(type, seg, className) {
  		var colCnt = this.colCnt;
  		var startCol = seg.leftCol;
  		var endCol = seg.rightCol + 1;
  		var skeletonEl;
  		var trEl;
  
  		className = className || type.toLowerCase();
  
  		skeletonEl = $(
  			'<div class="fc-' + className + '-skeleton">' +
  				'<table><tr/></table>' +
  			'</div>'
  		);
  		trEl = skeletonEl.find('tr');
  
  		if (startCol > 0) {
  			trEl.append('<td colspan="' + startCol + '"/>');
  		}
  
  		trEl.append(
  			seg.el.attr('colspan', endCol - startCol)
  		);
  
  		if (endCol < colCnt) {
  			trEl.append('<td colspan="' + (colCnt - endCol) + '"/>');
  		}
  
  		this.bookendCells(trEl);
  
  		return skeletonEl;
  	}
  
  });
  
  ;;
  
  /* Event-rendering methods for the DayGrid class
  ----------------------------------------------------------------------------------------------------------------------*/
  
  DayGrid.mixin({
  
  	rowStructs: null, // an array of objects, each holding information about a row's foreground event-rendering
  
  
  	// Unrenders all events currently rendered on the grid
  	unrenderEvents: function() {
  		this.removeSegPopover(); // removes the "more.." events popover
  		Grid.prototype.unrenderEvents.apply(this, arguments); // calls the super-method
  	},
  
  
  	// Retrieves all rendered segment objects currently rendered on the grid
  	getEventSegs: function() {
  		return Grid.prototype.getEventSegs.call(this) // get the segments from the super-method
  			.concat(this.popoverSegs || []); // append the segments from the "more..." popover
  	},
  
  
  	// Renders the given background event segments onto the grid
  	renderBgSegs: function(segs) {
  
  		// don't render timed background events
  		var allDaySegs = $.grep(segs, function(seg) {
  			return seg.event.allDay;
  		});
  
  		return Grid.prototype.renderBgSegs.call(this, allDaySegs); // call the super-method
  	},
  
  
  	// Renders the given foreground event segments onto the grid
  	renderFgSegs: function(segs) {
  		var rowStructs;
  
  		// render an `.el` on each seg
  		// returns a subset of the segs. segs that were actually rendered
  		segs = this.renderFgSegEls(segs);
  
  		rowStructs = this.rowStructs = this.renderSegRows(segs);
  
  		// append to each row's content skeleton
  		this.rowEls.each(function(i, rowNode) {
  			$(rowNode).find('.fc-content-skeleton > table').append(
  				rowStructs[i].tbodyEl
  			);
  		});
  
  		return segs; // return only the segs that were actually rendered
  	},
  
  
  	// Unrenders all currently rendered foreground event segments
  	unrenderFgSegs: function() {
  		var rowStructs = this.rowStructs || [];
  		var rowStruct;
  
  		while ((rowStruct = rowStructs.pop())) {
  			rowStruct.tbodyEl.remove();
  		}
  
  		this.rowStructs = null;
  	},
  
  
  	// Uses the given events array to generate <tbody> elements that should be appended to each row's content skeleton.
  	// Returns an array of rowStruct objects (see the bottom of `renderSegRow`).
  	// PRECONDITION: each segment shoud already have a rendered and assigned `.el`
  	renderSegRows: function(segs) {
  		var rowStructs = [];
  		var segRows;
  		var row;
  
  		segRows = this.groupSegRows(segs); // group into nested arrays
  
  		// iterate each row of segment groupings
  		for (row = 0; row < segRows.length; row++) {
  			rowStructs.push(
  				this.renderSegRow(row, segRows[row])
  			);
  		}
  
  		return rowStructs;
  	},
  
  
  	// Builds the HTML to be used for the default element for an individual segment
  	fgSegHtml: function(seg, disableResizing) {
  		var view = this.view;
  		var event = seg.event;
  		var isDraggable = view.isEventDraggable(event);
  		var isResizableFromStart = !disableResizing && event.allDay &&
  			seg.isStart && view.isEventResizableFromStart(event);
  		var isResizableFromEnd = !disableResizing && event.allDay &&
  			seg.isEnd && view.isEventResizableFromEnd(event);
  		var classes = this.getSegClasses(seg, isDraggable, isResizableFromStart || isResizableFromEnd);
  		var skinCss = cssToStr(this.getSegSkinCss(seg));
  		var timeHtml = '';
  		var timeText;
  		var titleHtml;
  
  		classes.unshift('fc-day-grid-event', 'fc-h-event');
  
  		// Only display a timed events time if it is the starting segment
  		if (seg.isStart) {
  			timeText = this.getEventTimeText(event);
  			if (timeText) {
  				timeHtml = '<span class="fc-time">' + htmlEscape(timeText) + '</span>';
  			}
  		}
  
  		titleHtml =
  			'<span class="fc-title">' +
  				(htmlEscape(event.title || '') || '&nbsp;') + // we always want one line of height
  			'</span>';
  
  		return '<a class="' + classes.join(' ') + '"' +
  				(event.url ?
  					' href="' + htmlEscape(event.url) + '"' :
  					''
  					) +
  				(skinCss ?
  					' style="' + skinCss + '"' :
  					''
  					) +
  			'>' +
  				'<div class="fc-content">' +
  					(this.isRTL ?
  						titleHtml + ' ' + timeHtml : // put a natural space in between
  						timeHtml + ' ' + titleHtml   //
  						) +
  				'</div>' +
  				(isResizableFromStart ?
  					'<div class="fc-resizer fc-start-resizer" />' :
  					''
  					) +
  				(isResizableFromEnd ?
  					'<div class="fc-resizer fc-end-resizer" />' :
  					''
  					) +
  			'</a>';
  	},
  
  
  	// Given a row # and an array of segments all in the same row, render a <tbody> element, a skeleton that contains
  	// the segments. Returns object with a bunch of internal data about how the render was calculated.
  	// NOTE: modifies rowSegs
  	renderSegRow: function(row, rowSegs) {
  		var colCnt = this.colCnt;
  		var segLevels = this.buildSegLevels(rowSegs); // group into sub-arrays of levels
  		var levelCnt = Math.max(1, segLevels.length); // ensure at least one level
  		var tbody = $('<tbody/>');
  		var segMatrix = []; // lookup for which segments are rendered into which level+col cells
  		var cellMatrix = []; // lookup for all <td> elements of the level+col matrix
  		var loneCellMatrix = []; // lookup for <td> elements that only take up a single column
  		var i, levelSegs;
  		var col;
  		var tr;
  		var j, seg;
  		var td;
  
  		// populates empty cells from the current column (`col`) to `endCol`
  		function emptyCellsUntil(endCol) {
  			while (col < endCol) {
  				// try to grab a cell from the level above and extend its rowspan. otherwise, create a fresh cell
  				td = (loneCellMatrix[i - 1] || [])[col];
  				if (td) {
  					td.attr(
  						'rowspan',
  						parseInt(td.attr('rowspan') || 1, 10) + 1
  					);
  				}
  				else {
  					td = $('<td/>');
  					tr.append(td);
  				}
  				cellMatrix[i][col] = td;
  				loneCellMatrix[i][col] = td;
  				col++;
  			}
  		}
  
  		for (i = 0; i < levelCnt; i++) { // iterate through all levels
  			levelSegs = segLevels[i];
  			col = 0;
  			tr = $('<tr/>');
  
  			segMatrix.push([]);
  			cellMatrix.push([]);
  			loneCellMatrix.push([]);
  
  			// levelCnt might be 1 even though there are no actual levels. protect against this.
  			// this single empty row is useful for styling.
  			if (levelSegs) {
  				for (j = 0; j < levelSegs.length; j++) { // iterate through segments in level
  					seg = levelSegs[j];
  
  					emptyCellsUntil(seg.leftCol);
  
  					// create a container that occupies or more columns. append the event element.
  					td = $('<td class="fc-event-container"/>').append(seg.el);
  					if (seg.leftCol != seg.rightCol) {
  						td.attr('colspan', seg.rightCol - seg.leftCol + 1);
  					}
  					else { // a single-column segment
  						loneCellMatrix[i][col] = td;
  					}
  
  					while (col <= seg.rightCol) {
  						cellMatrix[i][col] = td;
  						segMatrix[i][col] = seg;
  						col++;
  					}
  
  					tr.append(td);
  				}
  			}
  
  			emptyCellsUntil(colCnt); // finish off the row
  			this.bookendCells(tr);
  			tbody.append(tr);
  		}
  
  		return { // a "rowStruct"
  			row: row, // the row number
  			tbodyEl: tbody,
  			cellMatrix: cellMatrix,
  			segMatrix: segMatrix,
  			segLevels: segLevels,
  			segs: rowSegs
  		};
  	},
  
  
  	// Stacks a flat array of segments, which are all assumed to be in the same row, into subarrays of vertical levels.
  	// NOTE: modifies segs
  	buildSegLevels: function(segs) {
  		var levels = [];
  		var i, seg;
  		var j;
  
  		// Give preference to elements with certain criteria, so they have
  		// a chance to be closer to the top.
  		this.sortEventSegs(segs);
  
  		for (i = 0; i < segs.length; i++) {
  			seg = segs[i];
  
  			// loop through levels, starting with the topmost, until the segment doesn't collide with other segments
  			for (j = 0; j < levels.length; j++) {
  				if (!isDaySegCollision(seg, levels[j])) {
  					break;
  				}
  			}
  			// `j` now holds the desired subrow index
  			seg.level = j;
  
  			// create new level array if needed and append segment
  			(levels[j] || (levels[j] = [])).push(seg);
  		}
  
  		// order segments left-to-right. very important if calendar is RTL
  		for (j = 0; j < levels.length; j++) {
  			levels[j].sort(compareDaySegCols);
  		}
  
  		return levels;
  	},
  
  
  	// Given a flat array of segments, return an array of sub-arrays, grouped by each segment's row
  	groupSegRows: function(segs) {
  		var segRows = [];
  		var i;
  
  		for (i = 0; i < this.rowCnt; i++) {
  			segRows.push([]);
  		}
  
  		for (i = 0; i < segs.length; i++) {
  			segRows[segs[i].row].push(segs[i]);
  		}
  
  		return segRows;
  	}
  
  });
  
  
  // Computes whether two segments' columns collide. They are assumed to be in the same row.
  function isDaySegCollision(seg, otherSegs) {
  	var i, otherSeg;
  
  	for (i = 0; i < otherSegs.length; i++) {
  		otherSeg = otherSegs[i];
  
  		if (
  			otherSeg.leftCol <= seg.rightCol &&
  			otherSeg.rightCol >= seg.leftCol
  		) {
  			return true;
  		}
  	}
  
  	return false;
  }
  
  
  // A cmp function for determining the leftmost event
  function compareDaySegCols(a, b) {
  	return a.leftCol - b.leftCol;
  }
  
  ;;
  
  /* Methods relate to limiting the number events for a given day on a DayGrid
  ----------------------------------------------------------------------------------------------------------------------*/
  // NOTE: all the segs being passed around in here are foreground segs
  
  DayGrid.mixin({
  
  	segPopover: null, // the Popover that holds events that can't fit in a cell. null when not visible
  	popoverSegs: null, // an array of segment objects that the segPopover holds. null when not visible
  
  
  	removeSegPopover: function() {
  		if (this.segPopover) {
  			this.segPopover.hide(); // in handler, will call segPopover's removeElement
  		}
  	},
  
  
  	// Limits the number of "levels" (vertically stacking layers of events) for each row of the grid.
  	// `levelLimit` can be false (don't limit), a number, or true (should be computed).
  	limitRows: function(levelLimit) {
  		var rowStructs = this.rowStructs || [];
  		var row; // row #
  		var rowLevelLimit;
  
  		for (row = 0; row < rowStructs.length; row++) {
  			this.unlimitRow(row);
  
  			if (!levelLimit) {
  				rowLevelLimit = false;
  			}
  			else if (typeof levelLimit === 'number') {
  				rowLevelLimit = levelLimit;
  			}
  			else {
  				rowLevelLimit = this.computeRowLevelLimit(row);
  			}
  
  			if (rowLevelLimit !== false) {
  				this.limitRow(row, rowLevelLimit);
  			}
  		}
  	},
  
  
  	// Computes the number of levels a row will accomodate without going outside its bounds.
  	// Assumes the row is "rigid" (maintains a constant height regardless of what is inside).
  	// `row` is the row number.
  	computeRowLevelLimit: function(row) {
  		var rowEl = this.rowEls.eq(row); // the containing "fake" row div
  		var rowHeight = rowEl.height(); // TODO: cache somehow?
  		var trEls = this.rowStructs[row].tbodyEl.children();
  		var i, trEl;
  		var trHeight;
  
  		function iterInnerHeights(i, childNode) {
  			trHeight = Math.max(trHeight, $(childNode).outerHeight());
  		}
  
  		// Reveal one level <tr> at a time and stop when we find one out of bounds
  		for (i = 0; i < trEls.length; i++) {
  			trEl = trEls.eq(i).removeClass('fc-limited'); // reset to original state (reveal)
  
  			// with rowspans>1 and IE8, trEl.outerHeight() would return the height of the largest cell,
  			// so instead, find the tallest inner content element.
  			trHeight = 0;
  			trEl.find('> td > :first-child').each(iterInnerHeights);
  
  			if (trEl.position().top + trHeight > rowHeight) {
  				return i;
  			}
  		}
  
  		return false; // should not limit at all
  	},
  
  
  	// Limits the given grid row to the maximum number of levels and injects "more" links if necessary.
  	// `row` is the row number.
  	// `levelLimit` is a number for the maximum (inclusive) number of levels allowed.
  	limitRow: function(row, levelLimit) {
  		var _this = this;
  		var rowStruct = this.rowStructs[row];
  		var moreNodes = []; // array of "more" <a> links and <td> DOM nodes
  		var col = 0; // col #, left-to-right (not chronologically)
  		var levelSegs; // array of segment objects in the last allowable level, ordered left-to-right
  		var cellMatrix; // a matrix (by level, then column) of all <td> jQuery elements in the row
  		var limitedNodes; // array of temporarily hidden level <tr> and segment <td> DOM nodes
  		var i, seg;
  		var segsBelow; // array of segment objects below `seg` in the current `col`
  		var totalSegsBelow; // total number of segments below `seg` in any of the columns `seg` occupies
  		var colSegsBelow; // array of segment arrays, below seg, one for each column (offset from segs's first column)
  		var td, rowspan;
  		var segMoreNodes; // array of "more" <td> cells that will stand-in for the current seg's cell
  		var j;
  		var moreTd, moreWrap, moreLink;
  
  		// Iterates through empty level cells and places "more" links inside if need be
  		function emptyCellsUntil(endCol) { // goes from current `col` to `endCol`
  			while (col < endCol) {
  				segsBelow = _this.getCellSegs(row, col, levelLimit);
  				if (segsBelow.length) {
  					td = cellMatrix[levelLimit - 1][col];
  					moreLink = _this.renderMoreLink(row, col, segsBelow);
  					moreWrap = $('<div/>').append(moreLink);
  					td.append(moreWrap);
  					moreNodes.push(moreWrap[0]);
  				}
  				col++;
  			}
  		}
  
  		if (levelLimit && levelLimit < rowStruct.segLevels.length) { // is it actually over the limit?
  			levelSegs = rowStruct.segLevels[levelLimit - 1];
  			cellMatrix = rowStruct.cellMatrix;
  
  			limitedNodes = rowStruct.tbodyEl.children().slice(levelLimit) // get level <tr> elements past the limit
  				.addClass('fc-limited').get(); // hide elements and get a simple DOM-nodes array
  
  			// iterate though segments in the last allowable level
  			for (i = 0; i < levelSegs.length; i++) {
  				seg = levelSegs[i];
  				emptyCellsUntil(seg.leftCol); // process empty cells before the segment
  
  				// determine *all* segments below `seg` that occupy the same columns
  				colSegsBelow = [];
  				totalSegsBelow = 0;
  				while (col <= seg.rightCol) {
  					segsBelow = this.getCellSegs(row, col, levelLimit);
  					colSegsBelow.push(segsBelow);
  					totalSegsBelow += segsBelow.length;
  					col++;
  				}
  
  				if (totalSegsBelow) { // do we need to replace this segment with one or many "more" links?
  					td = cellMatrix[levelLimit - 1][seg.leftCol]; // the segment's parent cell
  					rowspan = td.attr('rowspan') || 1;
  					segMoreNodes = [];
  
  					// make a replacement <td> for each column the segment occupies. will be one for each colspan
  					for (j = 0; j < colSegsBelow.length; j++) {
  						moreTd = $('<td class="fc-more-cell"/>').attr('rowspan', rowspan);
  						segsBelow = colSegsBelow[j];
  						moreLink = this.renderMoreLink(
  							row,
  							seg.leftCol + j,
  							[ seg ].concat(segsBelow) // count seg as hidden too
  						);
  						moreWrap = $('<div/>').append(moreLink);
  						moreTd.append(moreWrap);
  						segMoreNodes.push(moreTd[0]);
  						moreNodes.push(moreTd[0]);
  					}
  
  					td.addClass('fc-limited').after($(segMoreNodes)); // hide original <td> and inject replacements
  					limitedNodes.push(td[0]);
  				}
  			}
  
  			emptyCellsUntil(this.colCnt); // finish off the level
  			rowStruct.moreEls = $(moreNodes); // for easy undoing later
  			rowStruct.limitedEls = $(limitedNodes); // for easy undoing later
  		}
  	},
  
  
  	// Reveals all levels and removes all "more"-related elements for a grid's row.
  	// `row` is a row number.
  	unlimitRow: function(row) {
  		var rowStruct = this.rowStructs[row];
  
  		if (rowStruct.moreEls) {
  			rowStruct.moreEls.remove();
  			rowStruct.moreEls = null;
  		}
  
  		if (rowStruct.limitedEls) {
  			rowStruct.limitedEls.removeClass('fc-limited');
  			rowStruct.limitedEls = null;
  		}
  	},
  
  
  	// Renders an <a> element that represents hidden event element for a cell.
  	// Responsible for attaching click handler as well.
  	renderMoreLink: function(row, col, hiddenSegs) {
  		var _this = this;
  		var view = this.view;
  
  		return $('<a class="fc-more"/>')
  			.text(
  				this.getMoreLinkText(hiddenSegs.length)
  			)
  			.on('click', function(ev) {
  				var clickOption = view.opt('eventLimitClick');
  				var date = _this.getCellDate(row, col);
  				var moreEl = $(this);
  				var dayEl = _this.getCellEl(row, col);
  				var allSegs = _this.getCellSegs(row, col);
  
  				// rescope the segments to be within the cell's date
  				var reslicedAllSegs = _this.resliceDaySegs(allSegs, date);
  				var reslicedHiddenSegs = _this.resliceDaySegs(hiddenSegs, date);
  
  				if (typeof clickOption === 'function') {
  					// the returned value can be an atomic option
  					clickOption = view.trigger('eventLimitClick', null, {
  						date: date,
  						dayEl: dayEl,
  						moreEl: moreEl,
  						segs: reslicedAllSegs,
  						hiddenSegs: reslicedHiddenSegs
  					}, ev);
  				}
  
  				if (clickOption === 'popover') {
  					_this.showSegPopover(row, col, moreEl, reslicedAllSegs);
  				}
  				else if (typeof clickOption === 'string') { // a view name
  					view.calendar.zoomTo(date, clickOption);
  				}
  			});
  	},
  
  
  	// Reveals the popover that displays all events within a cell
  	showSegPopover: function(row, col, moreLink, segs) {
  		var _this = this;
  		var view = this.view;
  		var moreWrap = moreLink.parent(); // the <div> wrapper around the <a>
  		var topEl; // the element we want to match the top coordinate of
  		var options;
  
  		if (this.rowCnt == 1) {
  			topEl = view.el; // will cause the popover to cover any sort of header
  		}
  		else {
  			topEl = this.rowEls.eq(row); // will align with top of row
  		}
  
  		options = {
  			className: 'fc-more-popover',
  			content: this.renderSegPopoverContent(row, col, segs),
  			parentEl: this.view.el, // attach to root of view. guarantees outside of scrollbars.
  			top: topEl.offset().top,
  			autoHide: true, // when the user clicks elsewhere, hide the popover
  			viewportConstrain: view.opt('popoverViewportConstrain'),
  			hide: function() {
  				// kill everything when the popover is hidden
  				_this.segPopover.removeElement();
  				_this.segPopover = null;
  				_this.popoverSegs = null;
  			}
  		};
  
  		// Determine horizontal coordinate.
  		// We use the moreWrap instead of the <td> to avoid border confusion.
  		if (this.isRTL) {
  			options.right = moreWrap.offset().left + moreWrap.outerWidth() + 1; // +1 to be over cell border
  		}
  		else {
  			options.left = moreWrap.offset().left - 1; // -1 to be over cell border
  		}
  
  		this.segPopover = new Popover(options);
  		this.segPopover.show();
  
  		// the popover doesn't live within the grid's container element, and thus won't get the event
  		// delegated-handlers for free. attach event-related handlers to the popover.
  		this.bindSegHandlersToEl(this.segPopover.el);
  	},
  
  
  	// Builds the inner DOM contents of the segment popover
  	renderSegPopoverContent: function(row, col, segs) {
  		var view = this.view;
  		var isTheme = view.opt('theme');
  		var title = this.getCellDate(row, col).format(view.opt('dayPopoverFormat'));
  		var content = $(
  			'<div class="fc-header ' + view.widgetHeaderClass + '">' +
  				'<span class="fc-close ' +
  					(isTheme ? 'ui-icon ui-icon-closethick' : 'fc-icon fc-icon-x') +
  				'"></span>' +
  				'<span class="fc-title">' +
  					htmlEscape(title) +
  				'</span>' +
  				'<div class="fc-clear"/>' +
  			'</div>' +
  			'<div class="fc-body ' + view.widgetContentClass + '">' +
  				'<div class="fc-event-container"></div>' +
  			'</div>'
  		);
  		var segContainer = content.find('.fc-event-container');
  		var i;
  
  		// render each seg's `el` and only return the visible segs
  		segs = this.renderFgSegEls(segs, true); // disableResizing=true
  		this.popoverSegs = segs;
  
  		for (i = 0; i < segs.length; i++) {
  
  			// because segments in the popover are not part of a grid coordinate system, provide a hint to any
  			// grids that want to do drag-n-drop about which cell it came from
  			this.prepareHits();
  			segs[i].hit = this.getCellHit(row, col);
  			this.releaseHits();
  
  			segContainer.append(segs[i].el);
  		}
  
  		return content;
  	},
  
  
  	// Given the events within an array of segment objects, reslice them to be in a single day
  	resliceDaySegs: function(segs, dayDate) {
  
  		// build an array of the original events
  		var events = $.map(segs, function(seg) {
  			return seg.event;
  		});
  
  		var dayStart = dayDate.clone();
  		var dayEnd = dayStart.clone().add(1, 'days');
  		var dayRange = { start: dayStart, end: dayEnd };
  
  		// slice the events with a custom slicing function
  		segs = this.eventsToSegs(
  			events,
  			function(range) {
  				var seg = intersectRanges(range, dayRange); // undefind if no intersection
  				return seg ? [ seg ] : []; // must return an array of segments
  			}
  		);
  
  		// force an order because eventsToSegs doesn't guarantee one
  		this.sortEventSegs(segs);
  
  		return segs;
  	},
  
  
  	// Generates the text that should be inside a "more" link, given the number of events it represents
  	getMoreLinkText: function(num) {
  		var opt = this.view.opt('eventLimitText');
  
  		if (typeof opt === 'function') {
  			return opt(num);
  		}
  		else {
  			return '+' + num + ' ' + opt;
  		}
  	},
  
  
  	// Returns segments within a given cell.
  	// If `startLevel` is specified, returns only events including and below that level. Otherwise returns all segs.
  	getCellSegs: function(row, col, startLevel) {
  		var segMatrix = this.rowStructs[row].segMatrix;
  		var level = startLevel || 0;
  		var segs = [];
  		var seg;
  
  		while (level < segMatrix.length) {
  			seg = segMatrix[level][col];
  			if (seg) {
  				segs.push(seg);
  			}
  			level++;
  		}
  
  		return segs;
  	}
  
  });
  
  ;;
  
  /* A component that renders one or more columns of vertical time slots
  ----------------------------------------------------------------------------------------------------------------------*/
  // We mixin DayTable, even though there is only a single row of days
  
  var TimeGrid = FC.TimeGrid = Grid.extend(DayTableMixin, {
  
  	slotDuration: null, // duration of a "slot", a distinct time segment on given day, visualized by lines
  	snapDuration: null, // granularity of time for dragging and selecting
  	snapsPerSlot: null,
  	minTime: null, // Duration object that denotes the first visible time of any given day
  	maxTime: null, // Duration object that denotes the exclusive visible end time of any given day
  	labelFormat: null, // formatting string for times running along vertical axis
  	labelInterval: null, // duration of how often a label should be displayed for a slot
  
  	colEls: null, // cells elements in the day-row background
  	slatContainerEl: null, // div that wraps all the slat rows
  	slatEls: null, // elements running horizontally across all columns
  	nowIndicatorEls: null,
  
  	colCoordCache: null,
  	slatCoordCache: null,
  
  
  	constructor: function() {
  		Grid.apply(this, arguments); // call the super-constructor
  
  		this.processOptions();
  	},
  
  
  	// Renders the time grid into `this.el`, which should already be assigned.
  	// Relies on the view's colCnt. In the future, this component should probably be self-sufficient.
  	renderDates: function() {
  		this.el.html(this.renderHtml());
  		this.colEls = this.el.find('.fc-day');
  		this.slatContainerEl = this.el.find('.fc-slats');
  		this.slatEls = this.slatContainerEl.find('tr');
  
  		this.colCoordCache = new CoordCache({
  			els: this.colEls,
  			isHorizontal: true
  		});
  		this.slatCoordCache = new CoordCache({
  			els: this.slatEls,
  			isVertical: true
  		});
  
  		this.renderContentSkeleton();
  	},
  
  
  	// Renders the basic HTML skeleton for the grid
  	renderHtml: function() {
  		return '' +
  			'<div class="fc-bg">' +
  				'<table>' +
  					this.renderBgTrHtml(0) + // row=0
  				'</table>' +
  			'</div>' +
  			'<div class="fc-slats">' +
  				'<table>' +
  					this.renderSlatRowHtml() +
  				'</table>' +
  			'</div>';
  	},
  
  
  	// Generates the HTML for the horizontal "slats" that run width-wise. Has a time axis on a side. Depends on RTL.
  	renderSlatRowHtml: function() {
  		var view = this.view;
  		var isRTL = this.isRTL;
  		var html = '';
  		var slotTime = moment.duration(+this.minTime); // wish there was .clone() for durations
  		var slotDate; // will be on the view's first day, but we only care about its time
  		var isLabeled;
  		var axisHtml;
  
  		// Calculate the time for each slot
  		while (slotTime < this.maxTime) {
  			slotDate = this.start.clone().time(slotTime);
  			isLabeled = isInt(divideDurationByDuration(slotTime, this.labelInterval));
  
  			axisHtml =
  				'<td class="fc-axis fc-time ' + view.widgetContentClass + '" ' + view.axisStyleAttr() + '>' +
  					(isLabeled ?
  						'<span>' + // for matchCellWidths
  							htmlEscape(slotDate.format(this.labelFormat)) +
  						'</span>' :
  						''
  						) +
  				'</td>';
  
  			html +=
  				'<tr data-time="' + slotDate.format('HH:mm:ss') + '"' +
  					(isLabeled ? '' : ' class="fc-minor"') +
  					'>' +
  					(!isRTL ? axisHtml : '') +
  					'<td class="' + view.widgetContentClass + '"/>' +
  					(isRTL ? axisHtml : '') +
  				"</tr>";
  
  			slotTime.add(this.slotDuration);
  		}
  
  		return html;
  	},
  
  
  	/* Options
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Parses various options into properties of this object
  	processOptions: function() {
  		var view = this.view;
  		var slotDuration = view.opt('slotDuration');
  		var snapDuration = view.opt('snapDuration');
  		var input;
  
  		slotDuration = moment.duration(slotDuration);
  		snapDuration = snapDuration ? moment.duration(snapDuration) : slotDuration;
  
  		this.slotDuration = slotDuration;
  		this.snapDuration = snapDuration;
  		this.snapsPerSlot = slotDuration / snapDuration; // TODO: ensure an integer multiple?
  
  		this.minResizeDuration = snapDuration; // hack
  
  		this.minTime = moment.duration(view.opt('minTime'));
  		this.maxTime = moment.duration(view.opt('maxTime'));
  
  		// might be an array value (for TimelineView).
  		// if so, getting the most granular entry (the last one probably).
  		input = view.opt('slotLabelFormat');
  		if ($.isArray(input)) {
  			input = input[input.length - 1];
  		}
  
  		this.labelFormat =
  			input ||
  			view.opt('smallTimeFormat'); // the computed default
  
  		input = view.opt('slotLabelInterval');
  		this.labelInterval = input ?
  			moment.duration(input) :
  			this.computeLabelInterval(slotDuration);
  	},
  
  
  	// Computes an automatic value for slotLabelInterval
  	computeLabelInterval: function(slotDuration) {
  		var i;
  		var labelInterval;
  		var slotsPerLabel;
  
  		// find the smallest stock label interval that results in more than one slots-per-label
  		for (i = AGENDA_STOCK_SUB_DURATIONS.length - 1; i >= 0; i--) {
  			labelInterval = moment.duration(AGENDA_STOCK_SUB_DURATIONS[i]);
  			slotsPerLabel = divideDurationByDuration(labelInterval, slotDuration);
  			if (isInt(slotsPerLabel) && slotsPerLabel > 1) {
  				return labelInterval;
  			}
  		}
  
  		return moment.duration(slotDuration); // fall back. clone
  	},
  
  
  	// Computes a default event time formatting string if `timeFormat` is not explicitly defined
  	computeEventTimeFormat: function() {
  		return this.view.opt('noMeridiemTimeFormat'); // like "6:30" (no AM/PM)
  	},
  
  
  	// Computes a default `displayEventEnd` value if one is not expliclty defined
  	computeDisplayEventEnd: function() {
  		return true;
  	},
  
  
  	/* Hit System
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	prepareHits: function() {
  		this.colCoordCache.build();
  		this.slatCoordCache.build();
  	},
  
  
  	releaseHits: function() {
  		this.colCoordCache.clear();
  		// NOTE: don't clear slatCoordCache because we rely on it for computeTimeTop
  	},
  
  
  	queryHit: function(leftOffset, topOffset) {
  		var snapsPerSlot = this.snapsPerSlot;
  		var colCoordCache = this.colCoordCache;
  		var slatCoordCache = this.slatCoordCache;
  
  		if (colCoordCache.isLeftInBounds(leftOffset) && slatCoordCache.isTopInBounds(topOffset)) {
  			var colIndex = colCoordCache.getHorizontalIndex(leftOffset);
  			var slatIndex = slatCoordCache.getVerticalIndex(topOffset);
  
  			if (colIndex != null && slatIndex != null) {
  				var slatTop = slatCoordCache.getTopOffset(slatIndex);
  				var slatHeight = slatCoordCache.getHeight(slatIndex);
  				var partial = (topOffset - slatTop) / slatHeight; // floating point number between 0 and 1
  				var localSnapIndex = Math.floor(partial * snapsPerSlot); // the snap # relative to start of slat
  				var snapIndex = slatIndex * snapsPerSlot + localSnapIndex;
  				var snapTop = slatTop + (localSnapIndex / snapsPerSlot) * slatHeight;
  				var snapBottom = slatTop + ((localSnapIndex + 1) / snapsPerSlot) * slatHeight;
  
  				return {
  					col: colIndex,
  					snap: snapIndex,
  					component: this, // needed unfortunately :(
  					left: colCoordCache.getLeftOffset(colIndex),
  					right: colCoordCache.getRightOffset(colIndex),
  					top: snapTop,
  					bottom: snapBottom
  				};
  			}
  		}
  	},
  
  
  	getHitSpan: function(hit) {
  		var start = this.getCellDate(0, hit.col); // row=0
  		var time = this.computeSnapTime(hit.snap); // pass in the snap-index
  		var end;
  
  		start.time(time);
  		end = start.clone().add(this.snapDuration);
  
  		return { start: start, end: end };
  	},
  
  
  	getHitEl: function(hit) {
  		return this.colEls.eq(hit.col);
  	},
  
  
  	/* Dates
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	rangeUpdated: function() {
  		this.updateDayTable();
  	},
  
  
  	// Given a row number of the grid, representing a "snap", returns a time (Duration) from its start-of-day
  	computeSnapTime: function(snapIndex) {
  		return moment.duration(this.minTime + this.snapDuration * snapIndex);
  	},
  
  
  	// Slices up the given span (unzoned start/end with other misc data) into an array of segments
  	spanToSegs: function(span) {
  		var segs = this.sliceRangeByTimes(span);
  		var i;
  
  		for (i = 0; i < segs.length; i++) {
  			if (this.isRTL) {
  				segs[i].col = this.daysPerRow - 1 - segs[i].dayIndex;
  			}
  			else {
  				segs[i].col = segs[i].dayIndex;
  			}
  		}
  
  		return segs;
  	},
  
  
  	sliceRangeByTimes: function(range) {
  		var segs = [];
  		var seg;
  		var dayIndex;
  		var dayDate;
  		var dayRange;
  
  		for (dayIndex = 0; dayIndex < this.daysPerRow; dayIndex++) {
  			dayDate = this.dayDates[dayIndex].clone(); // TODO: better API for this?
  			dayRange = {
  				start: dayDate.clone().time(this.minTime),
  				end: dayDate.clone().time(this.maxTime)
  			};
  			seg = intersectRanges(range, dayRange); // both will be ambig timezone
  			if (seg) {
  				seg.dayIndex = dayIndex;
  				segs.push(seg);
  			}
  		}
  
  		return segs;
  	},
  
  
  	/* Coordinates
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	updateSize: function(isResize) { // NOT a standard Grid method
  		this.slatCoordCache.build();
  
  		if (isResize) {
  			this.updateSegVerticals(
  				[].concat(this.fgSegs || [], this.bgSegs || [], this.businessSegs || [])
  			);
  		}
  	},
  
  
  	getTotalSlatHeight: function() {
  		return this.slatContainerEl.outerHeight();
  	},
  
  
  	// Computes the top coordinate, relative to the bounds of the grid, of the given date.
  	// A `startOfDayDate` must be given for avoiding ambiguity over how to treat midnight.
  	computeDateTop: function(date, startOfDayDate) {
  		return this.computeTimeTop(
  			moment.duration(
  				date - startOfDayDate.clone().stripTime()
  			)
  		);
  	},
  
  
  	// Computes the top coordinate, relative to the bounds of the grid, of the given time (a Duration).
  	computeTimeTop: function(time) {
  		var len = this.slatEls.length;
  		var slatCoverage = (time - this.minTime) / this.slotDuration; // floating-point value of # of slots covered
  		var slatIndex;
  		var slatRemainder;
  
  		// compute a floating-point number for how many slats should be progressed through.
  		// from 0 to number of slats (inclusive)
  		// constrained because minTime/maxTime might be customized.
  		slatCoverage = Math.max(0, slatCoverage);
  		slatCoverage = Math.min(len, slatCoverage);
  
  		// an integer index of the furthest whole slat
  		// from 0 to number slats (*exclusive*, so len-1)
  		slatIndex = Math.floor(slatCoverage);
  		slatIndex = Math.min(slatIndex, len - 1);
  
  		// how much further through the slatIndex slat (from 0.0-1.0) must be covered in addition.
  		// could be 1.0 if slatCoverage is covering *all* the slots
  		slatRemainder = slatCoverage - slatIndex;
  
  		return this.slatCoordCache.getTopPosition(slatIndex) +
  			this.slatCoordCache.getHeight(slatIndex) * slatRemainder;
  	},
  
  
  
  	/* Event Drag Visualization
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders a visual indication of an event being dragged over the specified date(s).
  	// A returned value of `true` signals that a mock "helper" event has been rendered.
  	renderDrag: function(eventLocation, seg) {
  
  		if (seg) { // if there is event information for this drag, render a helper event
  
  			// returns mock event elements
  			// signal that a helper has been rendered
  			return this.renderEventLocationHelper(eventLocation, seg);
  		}
  		else {
  			// otherwise, just render a highlight
  			this.renderHighlight(this.eventToSpan(eventLocation));
  		}
  	},
  
  
  	// Unrenders any visual indication of an event being dragged
  	unrenderDrag: function() {
  		this.unrenderHelper();
  		this.unrenderHighlight();
  	},
  
  
  	/* Event Resize Visualization
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders a visual indication of an event being resized
  	renderEventResize: function(eventLocation, seg) {
  		return this.renderEventLocationHelper(eventLocation, seg); // returns mock event elements
  	},
  
  
  	// Unrenders any visual indication of an event being resized
  	unrenderEventResize: function() {
  		this.unrenderHelper();
  	},
  
  
  	/* Event Helper
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders a mock "helper" event. `sourceSeg` is the original segment object and might be null (an external drag)
  	renderHelper: function(event, sourceSeg) {
  		return this.renderHelperSegs(this.eventToSegs(event), sourceSeg); // returns mock event elements
  	},
  
  
  	// Unrenders any mock helper event
  	unrenderHelper: function() {
  		this.unrenderHelperSegs();
  	},
  
  
  	/* Business Hours
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	renderBusinessHours: function() {
  		this.renderBusinessSegs(
  			this.buildBusinessHourSegs()
  		);
  	},
  
  
  	unrenderBusinessHours: function() {
  		this.unrenderBusinessSegs();
  	},
  
  
  	/* Now Indicator
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	getNowIndicatorUnit: function() {
  		return 'minute'; // will refresh on the minute
  	},
  
  
  	renderNowIndicator: function(date) {
  		// seg system might be overkill, but it handles scenario where line needs to be rendered
  		//  more than once because of columns with the same date (resources columns for example)
  		var segs = this.spanToSegs({ start: date, end: date });
  		var top = this.computeDateTop(date, date);
  		var nodes = [];
  		var i;
  
  		// render lines within the columns
  		for (i = 0; i < segs.length; i++) {
  			nodes.push($('<div class="fc-now-indicator fc-now-indicator-line"></div>')
  				.css('top', top)
  				.appendTo(this.colContainerEls.eq(segs[i].col))[0]);
  		}
  
  		// render an arrow over the axis
  		if (segs.length > 0) { // is the current time in view?
  			nodes.push($('<div class="fc-now-indicator fc-now-indicator-arrow"></div>')
  				.css('top', top)
  				.appendTo(this.el.find('.fc-content-skeleton'))[0]);
  		}
  
  		this.nowIndicatorEls = $(nodes);
  	},
  
  
  	unrenderNowIndicator: function() {
  		if (this.nowIndicatorEls) {
  			this.nowIndicatorEls.remove();
  			this.nowIndicatorEls = null;
  		}
  	},
  
  
  	/* Selection
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders a visual indication of a selection. Overrides the default, which was to simply render a highlight.
  	renderSelection: function(span) {
  		if (this.view.opt('selectHelper')) { // this setting signals that a mock helper event should be rendered
  
  			// normally acceps an eventLocation, span has a start/end, which is good enough
  			this.renderEventLocationHelper(span);
  		}
  		else {
  			this.renderHighlight(span);
  		}
  	},
  
  
  	// Unrenders any visual indication of a selection
  	unrenderSelection: function() {
  		this.unrenderHelper();
  		this.unrenderHighlight();
  	},
  
  
  	/* Highlight
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	renderHighlight: function(span) {
  		this.renderHighlightSegs(this.spanToSegs(span));
  	},
  
  
  	unrenderHighlight: function() {
  		this.unrenderHighlightSegs();
  	}
  
  });
  
  ;;
  
  /* Methods for rendering SEGMENTS, pieces of content that live on the view
   ( this file is no longer just for events )
  ----------------------------------------------------------------------------------------------------------------------*/
  
  TimeGrid.mixin({
  
  	colContainerEls: null, // containers for each column
  
  	// inner-containers for each column where different types of segs live
  	fgContainerEls: null,
  	bgContainerEls: null,
  	helperContainerEls: null,
  	highlightContainerEls: null,
  	businessContainerEls: null,
  
  	// arrays of different types of displayed segments
  	fgSegs: null,
  	bgSegs: null,
  	helperSegs: null,
  	highlightSegs: null,
  	businessSegs: null,
  
  
  	// Renders the DOM that the view's content will live in
  	renderContentSkeleton: function() {
  		var cellHtml = '';
  		var i;
  		var skeletonEl;
  
  		for (i = 0; i < this.colCnt; i++) {
  			cellHtml +=
  				'<td>' +
  					'<div class="fc-content-col">' +
  						'<div class="fc-event-container fc-helper-container"></div>' +
  						'<div class="fc-event-container"></div>' +
  						'<div class="fc-highlight-container"></div>' +
  						'<div class="fc-bgevent-container"></div>' +
  						'<div class="fc-business-container"></div>' +
  					'</div>' +
  				'</td>';
  		}
  
  		skeletonEl = $(
  			'<div class="fc-content-skeleton">' +
  				'<table>' +
  					'<tr>' + cellHtml + '</tr>' +
  				'</table>' +
  			'</div>'
  		);
  
  		this.colContainerEls = skeletonEl.find('.fc-content-col');
  		this.helperContainerEls = skeletonEl.find('.fc-helper-container');
  		this.fgContainerEls = skeletonEl.find('.fc-event-container:not(.fc-helper-container)');
  		this.bgContainerEls = skeletonEl.find('.fc-bgevent-container');
  		this.highlightContainerEls = skeletonEl.find('.fc-highlight-container');
  		this.businessContainerEls = skeletonEl.find('.fc-business-container');
  
  		this.bookendCells(skeletonEl.find('tr')); // TODO: do this on string level
  		this.el.append(skeletonEl);
  	},
  
  
  	/* Foreground Events
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	renderFgSegs: function(segs) {
  		segs = this.renderFgSegsIntoContainers(segs, this.fgContainerEls);
  		this.fgSegs = segs;
  		return segs; // needed for Grid::renderEvents
  	},
  
  
  	unrenderFgSegs: function() {
  		this.unrenderNamedSegs('fgSegs');
  	},
  
  
  	/* Foreground Helper Events
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	renderHelperSegs: function(segs, sourceSeg) {
  		var helperEls = [];
  		var i, seg;
  		var sourceEl;
  
  		segs = this.renderFgSegsIntoContainers(segs, this.helperContainerEls);
  
  		// Try to make the segment that is in the same row as sourceSeg look the same
  		for (i = 0; i < segs.length; i++) {
  			seg = segs[i];
  			if (sourceSeg && sourceSeg.col === seg.col) {
  				sourceEl = sourceSeg.el;
  				seg.el.css({
  					left: sourceEl.css('left'),
  					right: sourceEl.css('right'),
  					'margin-left': sourceEl.css('margin-left'),
  					'margin-right': sourceEl.css('margin-right')
  				});
  			}
  			helperEls.push(seg.el[0]);
  		}
  
  		this.helperSegs = segs;
  
  		return $(helperEls); // must return rendered helpers
  	},
  
  
  	unrenderHelperSegs: function() {
  		this.unrenderNamedSegs('helperSegs');
  	},
  
  
  	/* Background Events
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	renderBgSegs: function(segs) {
  		segs = this.renderFillSegEls('bgEvent', segs); // TODO: old fill system
  		this.updateSegVerticals(segs);
  		this.attachSegsByCol(this.groupSegsByCol(segs), this.bgContainerEls);
  		this.bgSegs = segs;
  		return segs; // needed for Grid::renderEvents
  	},
  
  
  	unrenderBgSegs: function() {
  		this.unrenderNamedSegs('bgSegs');
  	},
  
  
  	/* Highlight
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	renderHighlightSegs: function(segs) {
  		segs = this.renderFillSegEls('highlight', segs); // TODO: old fill system
  		this.updateSegVerticals(segs);
  		this.attachSegsByCol(this.groupSegsByCol(segs), this.highlightContainerEls);
  		this.highlightSegs = segs;
  	},
  
  
  	unrenderHighlightSegs: function() {
  		this.unrenderNamedSegs('highlightSegs');
  	},
  
  
  	/* Business Hours
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	renderBusinessSegs: function(segs) {
  		segs = this.renderFillSegEls('businessHours', segs); // TODO: old fill system
  		this.updateSegVerticals(segs);
  		this.attachSegsByCol(this.groupSegsByCol(segs), this.businessContainerEls);
  		this.businessSegs = segs;
  	},
  
  
  	unrenderBusinessSegs: function() {
  		this.unrenderNamedSegs('businessSegs');
  	},
  
  
  	/* Seg Rendering Utils
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Given a flat array of segments, return an array of sub-arrays, grouped by each segment's col
  	groupSegsByCol: function(segs) {
  		var segsByCol = [];
  		var i;
  
  		for (i = 0; i < this.colCnt; i++) {
  			segsByCol.push([]);
  		}
  
  		for (i = 0; i < segs.length; i++) {
  			segsByCol[segs[i].col].push(segs[i]);
  		}
  
  		return segsByCol;
  	},
  
  
  	// Given segments grouped by column, insert the segments' elements into a parallel array of container
  	// elements, each living within a column.
  	attachSegsByCol: function(segsByCol, containerEls) {
  		var col;
  		var segs;
  		var i;
  
  		for (col = 0; col < this.colCnt; col++) { // iterate each column grouping
  			segs = segsByCol[col];
  
  			for (i = 0; i < segs.length; i++) {
  				containerEls.eq(col).append(segs[i].el);
  			}
  		}
  	},
  
  
  	// Given the name of a property of `this` object, assumed to be an array of segments,
  	// loops through each segment and removes from DOM. Will null-out the property afterwards.
  	unrenderNamedSegs: function(propName) {
  		var segs = this[propName];
  		var i;
  
  		if (segs) {
  			for (i = 0; i < segs.length; i++) {
  				segs[i].el.remove();
  			}
  			this[propName] = null;
  		}
  	},
  
  
  
  	/* Foreground Event Rendering Utils
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Given an array of foreground segments, render a DOM element for each, computes position,
  	// and attaches to the column inner-container elements.
  	renderFgSegsIntoContainers: function(segs, containerEls) {
  		var segsByCol;
  		var col;
  
  		segs = this.renderFgSegEls(segs); // will call fgSegHtml
  		segsByCol = this.groupSegsByCol(segs);
  
  		for (col = 0; col < this.colCnt; col++) {
  			this.updateFgSegCoords(segsByCol[col]);
  		}
  
  		this.attachSegsByCol(segsByCol, containerEls);
  
  		return segs;
  	},
  
  
  	// Renders the HTML for a single event segment's default rendering
  	fgSegHtml: function(seg, disableResizing) {
  		var view = this.view;
  		var event = seg.event;
  		var isDraggable = view.isEventDraggable(event);
  		var isResizableFromStart = !disableResizing && seg.isStart && view.isEventResizableFromStart(event);
  		var isResizableFromEnd = !disableResizing && seg.isEnd && view.isEventResizableFromEnd(event);
  		var classes = this.getSegClasses(seg, isDraggable, isResizableFromStart || isResizableFromEnd);
  		var skinCss = cssToStr(this.getSegSkinCss(seg));
  		var timeText;
  		var fullTimeText; // more verbose time text. for the print stylesheet
  		var startTimeText; // just the start time text
  
  		classes.unshift('fc-time-grid-event', 'fc-v-event');
  
  		if (view.isMultiDayEvent(event)) { // if the event appears to span more than one day...
  			// Don't display time text on segments that run entirely through a day.
  			// That would appear as midnight-midnight and would look dumb.
  			// Otherwise, display the time text for the *segment's* times (like 6pm-midnight or midnight-10am)
  			if (seg.isStart || seg.isEnd) {
  				timeText = this.getEventTimeText(seg);
  				fullTimeText = this.getEventTimeText(seg, 'LT');
  				startTimeText = this.getEventTimeText(seg, null, false); // displayEnd=false
  			}
  		} else {
  			// Display the normal time text for the *event's* times
  			timeText = this.getEventTimeText(event);
  			fullTimeText = this.getEventTimeText(event, 'LT');
  			startTimeText = this.getEventTimeText(event, null, false); // displayEnd=false
  		}
  
  		return '<a class="' + classes.join(' ') + '"' +
  			(event.url ?
  				' href="' + htmlEscape(event.url) + '"' :
  				''
  				) +
  			(skinCss ?
  				' style="' + skinCss + '"' :
  				''
  				) +
  			'>' +
  				'<div class="fc-content">' +
  					(timeText ?
  						'<div class="fc-time"' +
  						' data-start="' + htmlEscape(startTimeText) + '"' +
  						' data-full="' + htmlEscape(fullTimeText) + '"' +
  						'>' +
  							'<span>' + htmlEscape(timeText) + '</span>' +
  						'</div>' :
  						''
  						) +
  					(event.title ?
  						'<div class="fc-title">' +
  							htmlEscape(event.title) +
  						'</div>' :
  						''
  						) +
  				'</div>' +
  				'<div class="fc-bg"/>' +
  				/* TODO: write CSS for this
  				(isResizableFromStart ?
  					'<div class="fc-resizer fc-start-resizer" />' :
  					''
  					) +
  				*/
  				(isResizableFromEnd ?
  					'<div class="fc-resizer fc-end-resizer" />' :
  					''
  					) +
  			'</a>';
  	},
  
  
  	/* Seg Position Utils
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Refreshes the CSS top/bottom coordinates for each segment element.
  	// Works when called after initial render, after a window resize/zoom for example.
  	updateSegVerticals: function(segs) {
  		this.computeSegVerticals(segs);
  		this.assignSegVerticals(segs);
  	},
  
  
  	// For each segment in an array, computes and assigns its top and bottom properties
  	computeSegVerticals: function(segs) {
  		var i, seg;
  
  		for (i = 0; i < segs.length; i++) {
  			seg = segs[i];
  			seg.top = this.computeDateTop(seg.start, seg.start);
  			seg.bottom = this.computeDateTop(seg.end, seg.start);
  		}
  	},
  
  
  	// Given segments that already have their top/bottom properties computed, applies those values to
  	// the segments' elements.
  	assignSegVerticals: function(segs) {
  		var i, seg;
  
  		for (i = 0; i < segs.length; i++) {
  			seg = segs[i];
  			seg.el.css(this.generateSegVerticalCss(seg));
  		}
  	},
  
  
  	// Generates an object with CSS properties for the top/bottom coordinates of a segment element
  	generateSegVerticalCss: function(seg) {
  		return {
  			top: seg.top,
  			bottom: -seg.bottom // flipped because needs to be space beyond bottom edge of event container
  		};
  	},
  
  
  	/* Foreground Event Positioning Utils
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Given segments that are assumed to all live in the *same column*,
  	// compute their verical/horizontal coordinates and assign to their elements.
  	updateFgSegCoords: function(segs) {
  		this.computeSegVerticals(segs); // horizontals relies on this
  		this.computeFgSegHorizontals(segs); // compute horizontal coordinates, z-index's, and reorder the array
  		this.assignSegVerticals(segs);
  		this.assignFgSegHorizontals(segs);
  	},
  
  
  	// Given an array of segments that are all in the same column, sets the backwardCoord and forwardCoord on each.
  	// NOTE: Also reorders the given array by date!
  	computeFgSegHorizontals: function(segs) {
  		var levels;
  		var level0;
  		var i;
  
  		this.sortEventSegs(segs); // order by certain criteria
  		levels = buildSlotSegLevels(segs);
  		computeForwardSlotSegs(levels);
  
  		if ((level0 = levels[0])) {
  
  			for (i = 0; i < level0.length; i++) {
  				computeSlotSegPressures(level0[i]);
  			}
  
  			for (i = 0; i < level0.length; i++) {
  				this.computeFgSegForwardBack(level0[i], 0, 0);
  			}
  		}
  	},
  
  
  	// Calculate seg.forwardCoord and seg.backwardCoord for the segment, where both values range
  	// from 0 to 1. If the calendar is left-to-right, the seg.backwardCoord maps to "left" and
  	// seg.forwardCoord maps to "right" (via percentage). Vice-versa if the calendar is right-to-left.
  	//
  	// The segment might be part of a "series", which means consecutive segments with the same pressure
  	// who's width is unknown until an edge has been hit. `seriesBackwardPressure` is the number of
  	// segments behind this one in the current series, and `seriesBackwardCoord` is the starting
  	// coordinate of the first segment in the series.
  	computeFgSegForwardBack: function(seg, seriesBackwardPressure, seriesBackwardCoord) {
  		var forwardSegs = seg.forwardSegs;
  		var i;
  
  		if (seg.forwardCoord === undefined) { // not already computed
  
  			if (!forwardSegs.length) {
  
  				// if there are no forward segments, this segment should butt up against the edge
  				seg.forwardCoord = 1;
  			}
  			else {
  
  				// sort highest pressure first
  				this.sortForwardSegs(forwardSegs);
  
  				// this segment's forwardCoord will be calculated from the backwardCoord of the
  				// highest-pressure forward segment.
  				this.computeFgSegForwardBack(forwardSegs[0], seriesBackwardPressure + 1, seriesBackwardCoord);
  				seg.forwardCoord = forwardSegs[0].backwardCoord;
  			}
  
  			// calculate the backwardCoord from the forwardCoord. consider the series
  			seg.backwardCoord = seg.forwardCoord -
  				(seg.forwardCoord - seriesBackwardCoord) / // available width for series
  				(seriesBackwardPressure + 1); // # of segments in the series
  
  			// use this segment's coordinates to computed the coordinates of the less-pressurized
  			// forward segments
  			for (i=0; i<forwardSegs.length; i++) {
  				this.computeFgSegForwardBack(forwardSegs[i], 0, seg.forwardCoord);
  			}
  		}
  	},
  
  
  	sortForwardSegs: function(forwardSegs) {
  		forwardSegs.sort(proxy(this, 'compareForwardSegs'));
  	},
  
  
  	// A cmp function for determining which forward segment to rely on more when computing coordinates.
  	compareForwardSegs: function(seg1, seg2) {
  		// put higher-pressure first
  		return seg2.forwardPressure - seg1.forwardPressure ||
  			// put segments that are closer to initial edge first (and favor ones with no coords yet)
  			(seg1.backwardCoord || 0) - (seg2.backwardCoord || 0) ||
  			// do normal sorting...
  			this.compareEventSegs(seg1, seg2);
  	},
  
  
  	// Given foreground event segments that have already had their position coordinates computed,
  	// assigns position-related CSS values to their elements.
  	assignFgSegHorizontals: function(segs) {
  		var i, seg;
  
  		for (i = 0; i < segs.length; i++) {
  			seg = segs[i];
  			seg.el.css(this.generateFgSegHorizontalCss(seg));
  
  			// if the height is short, add a className for alternate styling
  			if (seg.bottom - seg.top < 30) {
  				seg.el.addClass('fc-short');
  			}
  		}
  	},
  
  
  	// Generates an object with CSS properties/values that should be applied to an event segment element.
  	// Contains important positioning-related properties that should be applied to any event element, customized or not.
  	generateFgSegHorizontalCss: function(seg) {
  		var shouldOverlap = this.view.opt('slotEventOverlap');
  		var backwardCoord = seg.backwardCoord; // the left side if LTR. the right side if RTL. floating-point
  		var forwardCoord = seg.forwardCoord; // the right side if LTR. the left side if RTL. floating-point
  		var props = this.generateSegVerticalCss(seg); // get top/bottom first
  		var left; // amount of space from left edge, a fraction of the total width
  		var right; // amount of space from right edge, a fraction of the total width
  
  		if (shouldOverlap) {
  			// double the width, but don't go beyond the maximum forward coordinate (1.0)
  			forwardCoord = Math.min(1, backwardCoord + (forwardCoord - backwardCoord) * 2);
  		}
  
  		if (this.isRTL) {
  			left = 1 - forwardCoord;
  			right = backwardCoord;
  		}
  		else {
  			left = backwardCoord;
  			right = 1 - forwardCoord;
  		}
  
  		props.zIndex = seg.level + 1; // convert from 0-base to 1-based
  		props.left = left * 100 + '%';
  		props.right = right * 100 + '%';
  
  		if (shouldOverlap && seg.forwardPressure) {
  			// add padding to the edge so that forward stacked events don't cover the resizer's icon
  			props[this.isRTL ? 'marginLeft' : 'marginRight'] = 10 * 2; // 10 is a guesstimate of the icon's width
  		}
  
  		return props;
  	}
  
  });
  
  
  // Builds an array of segments "levels". The first level will be the leftmost tier of segments if the calendar is
  // left-to-right, or the rightmost if the calendar is right-to-left. Assumes the segments are already ordered by date.
  function buildSlotSegLevels(segs) {
  	var levels = [];
  	var i, seg;
  	var j;
  
  	for (i=0; i<segs.length; i++) {
  		seg = segs[i];
  
  		// go through all the levels and stop on the first level where there are no collisions
  		for (j=0; j<levels.length; j++) {
  			if (!computeSlotSegCollisions(seg, levels[j]).length) {
  				break;
  			}
  		}
  
  		seg.level = j;
  
  		(levels[j] || (levels[j] = [])).push(seg);
  	}
  
  	return levels;
  }
  
  
  // For every segment, figure out the other segments that are in subsequent
  // levels that also occupy the same vertical space. Accumulate in seg.forwardSegs
  function computeForwardSlotSegs(levels) {
  	var i, level;
  	var j, seg;
  	var k;
  
  	for (i=0; i<levels.length; i++) {
  		level = levels[i];
  
  		for (j=0; j<level.length; j++) {
  			seg = level[j];
  
  			seg.forwardSegs = [];
  			for (k=i+1; k<levels.length; k++) {
  				computeSlotSegCollisions(seg, levels[k], seg.forwardSegs);
  			}
  		}
  	}
  }
  
  
  // Figure out which path forward (via seg.forwardSegs) results in the longest path until
  // the furthest edge is reached. The number of segments in this path will be seg.forwardPressure
  function computeSlotSegPressures(seg) {
  	var forwardSegs = seg.forwardSegs;
  	var forwardPressure = 0;
  	var i, forwardSeg;
  
  	if (seg.forwardPressure === undefined) { // not already computed
  
  		for (i=0; i<forwardSegs.length; i++) {
  			forwardSeg = forwardSegs[i];
  
  			// figure out the child's maximum forward path
  			computeSlotSegPressures(forwardSeg);
  
  			// either use the existing maximum, or use the child's forward pressure
  			// plus one (for the forwardSeg itself)
  			forwardPressure = Math.max(
  				forwardPressure,
  				1 + forwardSeg.forwardPressure
  			);
  		}
  
  		seg.forwardPressure = forwardPressure;
  	}
  }
  
  
  // Find all the segments in `otherSegs` that vertically collide with `seg`.
  // Append into an optionally-supplied `results` array and return.
  function computeSlotSegCollisions(seg, otherSegs, results) {
  	results = results || [];
  
  	for (var i=0; i<otherSegs.length; i++) {
  		if (isSlotSegCollision(seg, otherSegs[i])) {
  			results.push(otherSegs[i]);
  		}
  	}
  
  	return results;
  }
  
  
  // Do these segments occupy the same vertical space?
  function isSlotSegCollision(seg1, seg2) {
  	return seg1.bottom > seg2.top && seg1.top < seg2.bottom;
  }
  
  ;;
  
  /* An abstract class from which other views inherit from
  ----------------------------------------------------------------------------------------------------------------------*/
  
  var View = FC.View = Class.extend(EmitterMixin, ListenerMixin, {
  
  	type: null, // subclass' view name (string)
  	name: null, // deprecated. use `type` instead
  	title: null, // the text that will be displayed in the header's title
  
  	calendar: null, // owner Calendar object
  	options: null, // hash containing all options. already merged with view-specific-options
  	el: null, // the view's containing element. set by Calendar
  
  	displaying: null, // a promise representing the state of rendering. null if no render requested
  	isSkeletonRendered: false,
  	isEventsRendered: false,
  
  	// range the view is actually displaying (moments)
  	start: null,
  	end: null, // exclusive
  
  	// range the view is formally responsible for (moments)
  	// may be different from start/end. for example, a month view might have 1st-31st, excluding padded dates
  	intervalStart: null,
  	intervalEnd: null, // exclusive
  	intervalDuration: null,
  	intervalUnit: null, // name of largest unit being displayed, like "month" or "week"
  
  	isRTL: false,
  	isSelected: false, // boolean whether a range of time is user-selected or not
  	selectedEvent: null,
  
  	eventOrderSpecs: null, // criteria for ordering events when they have same date/time
  
  	// classNames styled by jqui themes
  	widgetHeaderClass: null,
  	widgetContentClass: null,
  	highlightStateClass: null,
  
  	// for date utils, computed from options
  	nextDayThreshold: null,
  	isHiddenDayHash: null,
  
  	// now indicator
  	isNowIndicatorRendered: null,
  	initialNowDate: null, // result first getNow call
  	initialNowQueriedMs: null, // ms time the getNow was called
  	nowIndicatorTimeoutID: null, // for refresh timing of now indicator
  	nowIndicatorIntervalID: null, // "
  
  
  	constructor: function(calendar, type, options, intervalDuration) {
  
  		this.calendar = calendar;
  		this.type = this.name = type; // .name is deprecated
  		this.options = options;
  		this.intervalDuration = intervalDuration || moment.duration(1, 'day');
  
  		this.nextDayThreshold = moment.duration(this.opt('nextDayThreshold'));
  		this.initThemingProps();
  		this.initHiddenDays();
  		this.isRTL = this.opt('isRTL');
  
  		this.eventOrderSpecs = parseFieldSpecs(this.opt('eventOrder'));
  
  		this.initialize();
  	},
  
  
  	// A good place for subclasses to initialize member variables
  	initialize: function() {
  		// subclasses can implement
  	},
  
  
  	// Retrieves an option with the given name
  	opt: function(name) {
  		return this.options[name];
  	},
  
  
  	// Triggers handlers that are view-related. Modifies args before passing to calendar.
  	trigger: function(name, thisObj) { // arguments beyond thisObj are passed along
  		var calendar = this.calendar;
  
  		return calendar.trigger.apply(
  			calendar,
  			[name, thisObj || this].concat(
  				Array.prototype.slice.call(arguments, 2), // arguments beyond thisObj
  				[ this ] // always make the last argument a reference to the view. TODO: deprecate
  			)
  		);
  	},
  
  
  	/* Dates
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Updates all internal dates to center around the given current unzoned date.
  	setDate: function(date) {
  		this.setRange(this.computeRange(date));
  	},
  
  
  	// Updates all internal dates for displaying the given unzoned range.
  	setRange: function(range) {
  		$.extend(this, range); // assigns every property to this object's member variables
  		this.updateTitle();
  	},
  
  
  	// Given a single current unzoned date, produce information about what range to display.
  	// Subclasses can override. Must return all properties.
  	computeRange: function(date) {
  		var intervalUnit = computeIntervalUnit(this.intervalDuration);
  		var intervalStart = date.clone().startOf(intervalUnit);
  		var intervalEnd = intervalStart.clone().add(this.intervalDuration);
  		var start, end;
  
  		// normalize the range's time-ambiguity
  		if (/year|month|week|day/.test(intervalUnit)) { // whole-days?
  			intervalStart.stripTime();
  			intervalEnd.stripTime();
  		}
  		else { // needs to have a time?
  			if (!intervalStart.hasTime()) {
  				intervalStart = this.calendar.time(0); // give 00:00 time
  			}
  			if (!intervalEnd.hasTime()) {
  				intervalEnd = this.calendar.time(0); // give 00:00 time
  			}
  		}
  
  		start = intervalStart.clone();
  		start = this.skipHiddenDays(start);
  		end = intervalEnd.clone();
  		end = this.skipHiddenDays(end, -1, true); // exclusively move backwards
  
  		return {
  			intervalUnit: intervalUnit,
  			intervalStart: intervalStart,
  			intervalEnd: intervalEnd,
  			start: start,
  			end: end
  		};
  	},
  
  
  	// Computes the new date when the user hits the prev button, given the current date
  	computePrevDate: function(date) {
  		return this.massageCurrentDate(
  			date.clone().startOf(this.intervalUnit).subtract(this.intervalDuration), -1
  		);
  	},
  
  
  	// Computes the new date when the user hits the next button, given the current date
  	computeNextDate: function(date) {
  		return this.massageCurrentDate(
  			date.clone().startOf(this.intervalUnit).add(this.intervalDuration)
  		);
  	},
  
  
  	// Given an arbitrarily calculated current date of the calendar, returns a date that is ensured to be completely
  	// visible. `direction` is optional and indicates which direction the current date was being
  	// incremented or decremented (1 or -1).
  	massageCurrentDate: function(date, direction) {
  		if (this.intervalDuration.as('days') <= 1) { // if the view displays a single day or smaller
  			if (this.isHiddenDay(date)) {
  				date = this.skipHiddenDays(date, direction);
  				date.startOf('day');
  			}
  		}
  
  		return date;
  	},
  
  
  	/* Title and Date Formatting
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Sets the view's title property to the most updated computed value
  	updateTitle: function() {
  		this.title = this.computeTitle();
  	},
  
  
  	// Computes what the title at the top of the calendar should be for this view
  	computeTitle: function() {
  		return this.formatRange(
  			{
  				// in case intervalStart/End has a time, make sure timezone is correct
  				start: this.calendar.applyTimezone(this.intervalStart),
  				end: this.calendar.applyTimezone(this.intervalEnd)
  			},
  			this.opt('titleFormat') || this.computeTitleFormat(),
  			this.opt('titleRangeSeparator')
  		);
  	},
  
  
  	// Generates the format string that should be used to generate the title for the current date range.
  	// Attempts to compute the most appropriate format if not explicitly specified with `titleFormat`.
  	computeTitleFormat: function() {
  		if (this.intervalUnit == 'year') {
  			return 'YYYY';
  		}
  		else if (this.intervalUnit == 'month') {
  			return this.opt('monthYearFormat'); // like "September 2014"
  		}
  		else if (this.intervalDuration.as('days') > 1) {
  			return 'll'; // multi-day range. shorter, like "Sep 9 - 10 2014"
  		}
  		else {
  			return 'LL'; // one day. longer, like "September 9 2014"
  		}
  	},
  
  
  	// Utility for formatting a range. Accepts a range object, formatting string, and optional separator.
  	// Displays all-day ranges naturally, with an inclusive end. Takes the current isRTL into account.
  	// The timezones of the dates within `range` will be respected.
  	formatRange: function(range, formatStr, separator) {
  		var end = range.end;
  
  		if (!end.hasTime()) { // all-day?
  			end = end.clone().subtract(1); // convert to inclusive. last ms of previous day
  		}
  
  		return formatRange(range.start, end, formatStr, separator, this.opt('isRTL'));
  	},
  
  
  	getAllDayHtml: function() {
  		return this.opt('allDayHtml') || htmlEscape(this.opt('allDayText'));
  	},
  
  
  	/* Navigation
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Generates HTML for an anchor to another view into the calendar.
  	// Will either generate an <a> tag or a non-clickable <span> tag, depending on enabled settings.
  	// `gotoOptions` can either be a moment input, or an object with the form:
  	// { date, type, forceOff }
  	// `type` is a view-type like "day" or "week". default value is "day".
  	// `attrs` and `innerHtml` are use to generate the rest of the HTML tag.
  	buildGotoAnchorHtml: function(gotoOptions, attrs, innerHtml) {
  		var date, type, forceOff;
  		var finalOptions;
  
  		if ($.isPlainObject(gotoOptions)) {
  			date = gotoOptions.date;
  			type = gotoOptions.type;
  			forceOff = gotoOptions.forceOff;
  		}
  		else {
  			date = gotoOptions; // a single moment input
  		}
  		date = FC.moment(date); // if a string, parse it
  
  		finalOptions = { // for serialization into the link
  			date: date.format('YYYY-MM-DD'),
  			type: type || 'day'
  		};
  
  		if (typeof attrs === 'string') {
  			innerHtml = attrs;
  			attrs = null;
  		}
  
  		attrs = attrs ? ' ' + attrsToStr(attrs) : ''; // will have a leading space
  		innerHtml = innerHtml || '';
  
  		if (!forceOff && this.opt('navLinks')) {
  			return '<a' + attrs +
  				' data-goto="' + htmlEscape(JSON.stringify(finalOptions)) + '">' +
  				innerHtml +
  				'</a>';
  		}
  		else {
  			return '<span' + attrs + '>' +
  				innerHtml +
  				'</span>';
  		}
  	},
  
  
  	/* Rendering
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Sets the container element that the view should render inside of.
  	// Does other DOM-related initializations.
  	setElement: function(el) {
  		this.el = el;
  		this.bindGlobalHandlers();
  	},
  
  
  	// Removes the view's container element from the DOM, clearing any content beforehand.
  	// Undoes any other DOM-related attachments.
  	removeElement: function() {
  		this.clear(); // clears all content
  
  		// clean up the skeleton
  		if (this.isSkeletonRendered) {
  			this.unrenderSkeleton();
  			this.isSkeletonRendered = false;
  		}
  
  		this.unbindGlobalHandlers();
  
  		this.el.remove();
  
  		// NOTE: don't null-out this.el in case the View was destroyed within an API callback.
  		// We don't null-out the View's other jQuery element references upon destroy,
  		//  so we shouldn't kill this.el either.
  	},
  
  
  	// Does everything necessary to display the view centered around the given unzoned date.
  	// Does every type of rendering EXCEPT rendering events.
  	// Is asychronous and returns a promise.
  	display: function(date, explicitScrollState) {
  		var _this = this;
  		var prevScrollState = null;
  
  		if (explicitScrollState != null && this.displaying) { // don't need prevScrollState if explicitScrollState
  			prevScrollState = this.queryScroll();
  		}
  
  		this.calendar.freezeContentHeight();
  
  		return syncThen(this.clear(), function() { // clear the content first
  			return (
  				_this.displaying =
  					syncThen(_this.displayView(date), function() { // displayView might return a promise
  
  						// caller of display() wants a specific scroll state?
  						if (explicitScrollState != null) {
  							// we make an assumption that this is NOT the initial render,
  							// and thus don't need forceScroll (is inconveniently asynchronous)
  							_this.setScroll(explicitScrollState);
  						}
  						else {
  							_this.forceScroll(_this.computeInitialScroll(prevScrollState));
  						}
  
  						_this.calendar.unfreezeContentHeight();
  						_this.triggerRender();
  					})
  			);
  		});
  	},
  
  
  	// Does everything necessary to clear the content of the view.
  	// Clears dates and events. Does not clear the skeleton.
  	// Is asychronous and returns a promise.
  	clear: function() {
  		var _this = this;
  		var displaying = this.displaying;
  
  		if (displaying) { // previously displayed, or in the process of being displayed?
  			return syncThen(displaying, function() { // wait for the display to finish
  				_this.displaying = null;
  				_this.clearEvents();
  				return _this.clearView(); // might return a promise. chain it
  			});
  		}
  		else {
  			return $.when(); // an immediately-resolved promise
  		}
  	},
  
  
  	// Displays the view's non-event content, such as date-related content or anything required by events.
  	// Renders the view's non-content skeleton if necessary.
  	// Can be asynchronous and return a promise.
  	displayView: function(date) {
  		if (!this.isSkeletonRendered) {
  			this.renderSkeleton();
  			this.isSkeletonRendered = true;
  		}
  		if (date) {
  			this.setDate(date);
  		}
  		if (this.render) {
  			this.render(); // TODO: deprecate
  		}
  		this.renderDates();
  		this.updateSize();
  		this.renderBusinessHours(); // might need coordinates, so should go after updateSize()
  		this.startNowIndicator();
  	},
  
  
  	// Unrenders the view content that was rendered in displayView.
  	// Can be asynchronous and return a promise.
  	clearView: function() {
  		this.unselect();
  		this.stopNowIndicator();
  		this.triggerUnrender();
  		this.unrenderBusinessHours();
  		this.unrenderDates();
  		if (this.destroy) {
  			this.destroy(); // TODO: deprecate
  		}
  	},
  
  
  	// Renders the basic structure of the view before any content is rendered
  	renderSkeleton: function() {
  		// subclasses should implement
  	},
  
  
  	// Unrenders the basic structure of the view
  	unrenderSkeleton: function() {
  		// subclasses should implement
  	},
  
  
  	// Renders the view's date-related content.
  	// Assumes setRange has already been called and the skeleton has already been rendered.
  	renderDates: function() {
  		// subclasses should implement
  	},
  
  
  	// Unrenders the view's date-related content
  	unrenderDates: function() {
  		// subclasses should override
  	},
  
  
  	// Signals that the view's content has been rendered
  	triggerRender: function() {
  		this.trigger('viewRender', this, this, this.el);
  	},
  
  
  	// Signals that the view's content is about to be unrendered
  	triggerUnrender: function() {
  		this.trigger('viewDestroy', this, this, this.el);
  	},
  
  
  	// Binds DOM handlers to elements that reside outside the view container, such as the document
  	bindGlobalHandlers: function() {
  		this.listenTo($(document), 'mousedown', this.handleDocumentMousedown);
  		this.listenTo($(document), 'touchstart', this.processUnselect);
  	},
  
  
  	// Unbinds DOM handlers from elements that reside outside the view container
  	unbindGlobalHandlers: function() {
  		this.stopListeningTo($(document));
  	},
  
  
  	// Initializes internal variables related to theming
  	initThemingProps: function() {
  		var tm = this.opt('theme') ? 'ui' : 'fc';
  
  		this.widgetHeaderClass = tm + '-widget-header';
  		this.widgetContentClass = tm + '-widget-content';
  		this.highlightStateClass = tm + '-state-highlight';
  	},
  
  
  	/* Business Hours
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders business-hours onto the view. Assumes updateSize has already been called.
  	renderBusinessHours: function() {
  		// subclasses should implement
  	},
  
  
  	// Unrenders previously-rendered business-hours
  	unrenderBusinessHours: function() {
  		// subclasses should implement
  	},
  
  
  	/* Now Indicator
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Immediately render the current time indicator and begins re-rendering it at an interval,
  	// which is defined by this.getNowIndicatorUnit().
  	// TODO: somehow do this for the current whole day's background too
  	startNowIndicator: function() {
  		var _this = this;
  		var unit;
  		var update;
  		var delay; // ms wait value
  
  		if (this.opt('nowIndicator')) {
  			unit = this.getNowIndicatorUnit();
  			if (unit) {
  				update = proxy(this, 'updateNowIndicator'); // bind to `this`
  
  				this.initialNowDate = this.calendar.getNow();
  				this.initialNowQueriedMs = +new Date();
  				this.renderNowIndicator(this.initialNowDate);
  				this.isNowIndicatorRendered = true;
  
  				// wait until the beginning of the next interval
  				delay = this.initialNowDate.clone().startOf(unit).add(1, unit) - this.initialNowDate;
  				this.nowIndicatorTimeoutID = setTimeout(function() {
  					_this.nowIndicatorTimeoutID = null;
  					update();
  					delay = +moment.duration(1, unit);
  					delay = Math.max(100, delay); // prevent too frequent
  					_this.nowIndicatorIntervalID = setInterval(update, delay); // update every interval
  				}, delay);
  			}
  		}
  	},
  
  
  	// rerenders the now indicator, computing the new current time from the amount of time that has passed
  	// since the initial getNow call.
  	updateNowIndicator: function() {
  		if (this.isNowIndicatorRendered) {
  			this.unrenderNowIndicator();
  			this.renderNowIndicator(
  				this.initialNowDate.clone().add(new Date() - this.initialNowQueriedMs) // add ms
  			);
  		}
  	},
  
  
  	// Immediately unrenders the view's current time indicator and stops any re-rendering timers.
  	// Won't cause side effects if indicator isn't rendered.
  	stopNowIndicator: function() {
  		if (this.isNowIndicatorRendered) {
  
  			if (this.nowIndicatorTimeoutID) {
  				clearTimeout(this.nowIndicatorTimeoutID);
  				this.nowIndicatorTimeoutID = null;
  			}
  			if (this.nowIndicatorIntervalID) {
  				clearTimeout(this.nowIndicatorIntervalID);
  				this.nowIndicatorIntervalID = null;
  			}
  
  			this.unrenderNowIndicator();
  			this.isNowIndicatorRendered = false;
  		}
  	},
  
  
  	// Returns a string unit, like 'second' or 'minute' that defined how often the current time indicator
  	// should be refreshed. If something falsy is returned, no time indicator is rendered at all.
  	getNowIndicatorUnit: function() {
  		// subclasses should implement
  	},
  
  
  	// Renders a current time indicator at the given datetime
  	renderNowIndicator: function(date) {
  		// subclasses should implement
  	},
  
  
  	// Undoes the rendering actions from renderNowIndicator
  	unrenderNowIndicator: function() {
  		// subclasses should implement
  	},
  
  
  	/* Dimensions
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Refreshes anything dependant upon sizing of the container element of the grid
  	updateSize: function(isResize) {
  		var scrollState;
  
  		if (isResize) {
  			scrollState = this.queryScroll();
  		}
  
  		this.updateHeight(isResize);
  		this.updateWidth(isResize);
  		this.updateNowIndicator();
  
  		if (isResize) {
  			this.setScroll(scrollState);
  		}
  	},
  
  
  	// Refreshes the horizontal dimensions of the calendar
  	updateWidth: function(isResize) {
  		// subclasses should implement
  	},
  
  
  	// Refreshes the vertical dimensions of the calendar
  	updateHeight: function(isResize) {
  		var calendar = this.calendar; // we poll the calendar for height information
  
  		this.setHeight(
  			calendar.getSuggestedViewHeight(),
  			calendar.isHeightAuto()
  		);
  	},
  
  
  	// Updates the vertical dimensions of the calendar to the specified height.
  	// if `isAuto` is set to true, height becomes merely a suggestion and the view should use its "natural" height.
  	setHeight: function(height, isAuto) {
  		// subclasses should implement
  	},
  
  
  	/* Scroller
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Computes the initial pre-configured scroll state prior to allowing the user to change it.
  	// Given the scroll state from the previous rendering. If first time rendering, given null.
  	computeInitialScroll: function(previousScrollState) {
  		return 0;
  	},
  
  
  	// Retrieves the view's current natural scroll state. Can return an arbitrary format.
  	queryScroll: function() {
  		// subclasses must implement
  	},
  
  
  	// Sets the view's scroll state. Will accept the same format computeInitialScroll and queryScroll produce.
  	setScroll: function(scrollState) {
  		// subclasses must implement
  	},
  
  
  	// Sets the scroll state, making sure to overcome any predefined scroll value the browser has in mind
  	forceScroll: function(scrollState) {
  		var _this = this;
  
  		this.setScroll(scrollState);
  		setTimeout(function() {
  			_this.setScroll(scrollState);
  		}, 0);
  	},
  
  
  	/* Event Elements / Segments
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Does everything necessary to display the given events onto the current view
  	displayEvents: function(events) {
  		var scrollState = this.queryScroll();
  
  		this.clearEvents();
  		this.renderEvents(events);
  		this.isEventsRendered = true;
  		this.setScroll(scrollState);
  		this.triggerEventRender();
  	},
  
  
  	// Does everything necessary to clear the view's currently-rendered events
  	clearEvents: function() {
  		var scrollState;
  
  		if (this.isEventsRendered) {
  
  			// TODO: optimize: if we know this is part of a displayEvents call, don't queryScroll/setScroll
  			scrollState = this.queryScroll();
  
  			this.triggerEventUnrender();
  			if (this.destroyEvents) {
  				this.destroyEvents(); // TODO: deprecate
  			}
  			this.unrenderEvents();
  			this.setScroll(scrollState);
  			this.isEventsRendered = false;
  		}
  	},
  
  
  	// Renders the events onto the view.
  	renderEvents: function(events) {
  		// subclasses should implement
  	},
  
  
  	// Removes event elements from the view.
  	unrenderEvents: function() {
  		// subclasses should implement
  	},
  
  
  	// Signals that all events have been rendered
  	triggerEventRender: function() {
  		this.renderedEventSegEach(function(seg) {
  			this.trigger('eventAfterRender', seg.event, seg.event, seg.el);
  		});
  		this.trigger('eventAfterAllRender');
  	},
  
  
  	// Signals that all event elements are about to be removed
  	triggerEventUnrender: function() {
  		this.renderedEventSegEach(function(seg) {
  			this.trigger('eventDestroy', seg.event, seg.event, seg.el);
  		});
  	},
  
  
  	// Given an event and the default element used for rendering, returns the element that should actually be used.
  	// Basically runs events and elements through the eventRender hook.
  	resolveEventEl: function(event, el) {
  		var custom = this.trigger('eventRender', event, event, el);
  
  		if (custom === false) { // means don't render at all
  			el = null;
  		}
  		else if (custom && custom !== true) {
  			el = $(custom);
  		}
  
  		return el;
  	},
  
  
  	// Hides all rendered event segments linked to the given event
  	showEvent: function(event) {
  		this.renderedEventSegEach(function(seg) {
  			seg.el.css('visibility', '');
  		}, event);
  	},
  
  
  	// Shows all rendered event segments linked to the given event
  	hideEvent: function(event) {
  		this.renderedEventSegEach(function(seg) {
  			seg.el.css('visibility', 'hidden');
  		}, event);
  	},
  
  
  	// Iterates through event segments that have been rendered (have an el). Goes through all by default.
  	// If the optional `event` argument is specified, only iterates through segments linked to that event.
  	// The `this` value of the callback function will be the view.
  	renderedEventSegEach: function(func, event) {
  		var segs = this.getEventSegs();
  		var i;
  
  		for (i = 0; i < segs.length; i++) {
  			if (!event || segs[i].event._id === event._id) {
  				if (segs[i].el) {
  					func.call(this, segs[i]);
  				}
  			}
  		}
  	},
  
  
  	// Retrieves all the rendered segment objects for the view
  	getEventSegs: function() {
  		// subclasses must implement
  		return [];
  	},
  
  
  	/* Event Drag-n-Drop
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Computes if the given event is allowed to be dragged by the user
  	isEventDraggable: function(event) {
  		return this.isEventStartEditable(event);
  	},
  
  
  	isEventStartEditable: function(event) {
  		return firstDefined(
  			event.startEditable,
  			(event.source || {}).startEditable,
  			this.opt('eventStartEditable'),
  			this.isEventGenerallyEditable(event)
  		);
  	},
  
  
  	isEventGenerallyEditable: function(event) {
  		return firstDefined(
  			event.editable,
  			(event.source || {}).editable,
  			this.opt('editable')
  		);
  	},
  
  
  	// Must be called when an event in the view is dropped onto new location.
  	// `dropLocation` is an object that contains the new zoned start/end/allDay values for the event.
  	reportEventDrop: function(event, dropLocation, largeUnit, el, ev) {
  		var calendar = this.calendar;
  		var mutateResult = calendar.mutateEvent(event, dropLocation, largeUnit);
  		var undoFunc = function() {
  			mutateResult.undo();
  			calendar.reportEventChange();
  		};
  
  		this.triggerEventDrop(event, mutateResult.dateDelta, undoFunc, el, ev);
  		calendar.reportEventChange(); // will rerender events
  	},
  
  
  	// Triggers event-drop handlers that have subscribed via the API
  	triggerEventDrop: function(event, dateDelta, undoFunc, el, ev) {
  		this.trigger('eventDrop', el[0], event, dateDelta, undoFunc, ev, {}); // {} = jqui dummy
  	},
  
  
  	/* External Element Drag-n-Drop
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Must be called when an external element, via jQuery UI, has been dropped onto the calendar.
  	// `meta` is the parsed data that has been embedded into the dragging event.
  	// `dropLocation` is an object that contains the new zoned start/end/allDay values for the event.
  	reportExternalDrop: function(meta, dropLocation, el, ev, ui) {
  		var eventProps = meta.eventProps;
  		var eventInput;
  		var event;
  
  		// Try to build an event object and render it. TODO: decouple the two
  		if (eventProps) {
  			eventInput = $.extend({}, eventProps, dropLocation);
  			event = this.calendar.renderEvent(eventInput, meta.stick)[0]; // renderEvent returns an array
  		}
  
  		this.triggerExternalDrop(event, dropLocation, el, ev, ui);
  	},
  
  
  	// Triggers external-drop handlers that have subscribed via the API
  	triggerExternalDrop: function(event, dropLocation, el, ev, ui) {
  
  		// trigger 'drop' regardless of whether element represents an event
  		this.trigger('drop', el[0], dropLocation.start, ev, ui);
  
  		if (event) {
  			this.trigger('eventReceive', null, event); // signal an external event landed
  		}
  	},
  
  
  	/* Drag-n-Drop Rendering (for both events and external elements)
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders a visual indication of a event or external-element drag over the given drop zone.
  	// If an external-element, seg will be `null`.
  	// Must return elements used for any mock events.
  	renderDrag: function(dropLocation, seg) {
  		// subclasses must implement
  	},
  
  
  	// Unrenders a visual indication of an event or external-element being dragged.
  	unrenderDrag: function() {
  		// subclasses must implement
  	},
  
  
  	/* Event Resizing
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Computes if the given event is allowed to be resized from its starting edge
  	isEventResizableFromStart: function(event) {
  		return this.opt('eventResizableFromStart') && this.isEventResizable(event);
  	},
  
  
  	// Computes if the given event is allowed to be resized from its ending edge
  	isEventResizableFromEnd: function(event) {
  		return this.isEventResizable(event);
  	},
  
  
  	// Computes if the given event is allowed to be resized by the user at all
  	isEventResizable: function(event) {
  		var source = event.source || {};
  
  		return firstDefined(
  			event.durationEditable,
  			source.durationEditable,
  			this.opt('eventDurationEditable'),
  			event.editable,
  			source.editable,
  			this.opt('editable')
  		);
  	},
  
  
  	// Must be called when an event in the view has been resized to a new length
  	reportEventResize: function(event, resizeLocation, largeUnit, el, ev) {
  		var calendar = this.calendar;
  		var mutateResult = calendar.mutateEvent(event, resizeLocation, largeUnit);
  		var undoFunc = function() {
  			mutateResult.undo();
  			calendar.reportEventChange();
  		};
  
  		this.triggerEventResize(event, mutateResult.durationDelta, undoFunc, el, ev);
  		calendar.reportEventChange(); // will rerender events
  	},
  
  
  	// Triggers event-resize handlers that have subscribed via the API
  	triggerEventResize: function(event, durationDelta, undoFunc, el, ev) {
  		this.trigger('eventResize', el[0], event, durationDelta, undoFunc, ev, {}); // {} = jqui dummy
  	},
  
  
  	/* Selection (time range)
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Selects a date span on the view. `start` and `end` are both Moments.
  	// `ev` is the native mouse event that begin the interaction.
  	select: function(span, ev) {
  		this.unselect(ev);
  		this.renderSelection(span);
  		this.reportSelection(span, ev);
  	},
  
  
  	// Renders a visual indication of the selection
  	renderSelection: function(span) {
  		// subclasses should implement
  	},
  
  
  	// Called when a new selection is made. Updates internal state and triggers handlers.
  	reportSelection: function(span, ev) {
  		this.isSelected = true;
  		this.triggerSelect(span, ev);
  	},
  
  
  	// Triggers handlers to 'select'
  	triggerSelect: function(span, ev) {
  		this.trigger(
  			'select',
  			null,
  			this.calendar.applyTimezone(span.start), // convert to calendar's tz for external API
  			this.calendar.applyTimezone(span.end), // "
  			ev
  		);
  	},
  
  
  	// Undoes a selection. updates in the internal state and triggers handlers.
  	// `ev` is the native mouse event that began the interaction.
  	unselect: function(ev) {
  		if (this.isSelected) {
  			this.isSelected = false;
  			if (this.destroySelection) {
  				this.destroySelection(); // TODO: deprecate
  			}
  			this.unrenderSelection();
  			this.trigger('unselect', null, ev);
  		}
  	},
  
  
  	// Unrenders a visual indication of selection
  	unrenderSelection: function() {
  		// subclasses should implement
  	},
  
  
  	/* Event Selection
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	selectEvent: function(event) {
  		if (!this.selectedEvent || this.selectedEvent !== event) {
  			this.unselectEvent();
  			this.renderedEventSegEach(function(seg) {
  				seg.el.addClass('fc-selected');
  			}, event);
  			this.selectedEvent = event;
  		}
  	},
  
  
  	unselectEvent: function() {
  		if (this.selectedEvent) {
  			this.renderedEventSegEach(function(seg) {
  				seg.el.removeClass('fc-selected');
  			}, this.selectedEvent);
  			this.selectedEvent = null;
  		}
  	},
  
  
  	isEventSelected: function(event) {
  		// event references might change on refetchEvents(), while selectedEvent doesn't,
  		// so compare IDs
  		return this.selectedEvent && this.selectedEvent._id === event._id;
  	},
  
  
  	/* Mouse / Touch Unselecting (time range & event unselection)
  	------------------------------------------------------------------------------------------------------------------*/
  	// TODO: move consistently to down/start or up/end?
  	// TODO: don't kill previous selection if touch scrolling
  
  
  	handleDocumentMousedown: function(ev) {
  		if (isPrimaryMouseButton(ev)) {
  			this.processUnselect(ev);
  		}
  	},
  
  
  	processUnselect: function(ev) {
  		this.processRangeUnselect(ev);
  		this.processEventUnselect(ev);
  	},
  
  
  	processRangeUnselect: function(ev) {
  		var ignore;
  
  		// is there a time-range selection?
  		if (this.isSelected && this.opt('unselectAuto')) {
  			// only unselect if the clicked element is not identical to or inside of an 'unselectCancel' element
  			ignore = this.opt('unselectCancel');
  			if (!ignore || !$(ev.target).closest(ignore).length) {
  				this.unselect(ev);
  			}
  		}
  	},
  
  
  	processEventUnselect: function(ev) {
  		if (this.selectedEvent) {
  			if (!$(ev.target).closest('.fc-selected').length) {
  				this.unselectEvent();
  			}
  		}
  	},
  
  
  	/* Day Click
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Triggers handlers to 'dayClick'
  	// Span has start/end of the clicked area. Only the start is useful.
  	triggerDayClick: function(span, dayEl, ev) {
  		this.trigger(
  			'dayClick',
  			dayEl,
  			this.calendar.applyTimezone(span.start), // convert to calendar's timezone for external API
  			ev
  		);
  	},
  
  
  	/* Date Utils
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Initializes internal variables related to calculating hidden days-of-week
  	initHiddenDays: function() {
  		var hiddenDays = this.opt('hiddenDays') || []; // array of day-of-week indices that are hidden
  		var isHiddenDayHash = []; // is the day-of-week hidden? (hash with day-of-week-index -> bool)
  		var dayCnt = 0;
  		var i;
  
  		if (this.opt('weekends') === false) {
  			hiddenDays.push(0, 6); // 0=sunday, 6=saturday
  		}
  
  		for (i = 0; i < 7; i++) {
  			if (
  				!(isHiddenDayHash[i] = $.inArray(i, hiddenDays) !== -1)
  			) {
  				dayCnt++;
  			}
  		}
  
  		if (!dayCnt) {
  			throw 'invalid hiddenDays'; // all days were hidden? bad.
  		}
  
  		this.isHiddenDayHash = isHiddenDayHash;
  	},
  
  
  	// Is the current day hidden?
  	// `day` is a day-of-week index (0-6), or a Moment
  	isHiddenDay: function(day) {
  		if (moment.isMoment(day)) {
  			day = day.day();
  		}
  		return this.isHiddenDayHash[day];
  	},
  
  
  	// Incrementing the current day until it is no longer a hidden day, returning a copy.
  	// If the initial value of `date` is not a hidden day, don't do anything.
  	// Pass `isExclusive` as `true` if you are dealing with an end date.
  	// `inc` defaults to `1` (increment one day forward each time)
  	skipHiddenDays: function(date, inc, isExclusive) {
  		var out = date.clone();
  		inc = inc || 1;
  		while (
  			this.isHiddenDayHash[(out.day() + (isExclusive ? inc : 0) + 7) % 7]
  		) {
  			out.add(inc, 'days');
  		}
  		return out;
  	},
  
  
  	// Returns the date range of the full days the given range visually appears to occupy.
  	// Returns a new range object.
  	computeDayRange: function(range) {
  		var startDay = range.start.clone().stripTime(); // the beginning of the day the range starts
  		var end = range.end;
  		var endDay = null;
  		var endTimeMS;
  
  		if (end) {
  			endDay = end.clone().stripTime(); // the beginning of the day the range exclusively ends
  			endTimeMS = +end.time(); // # of milliseconds into `endDay`
  
  			// If the end time is actually inclusively part of the next day and is equal to or
  			// beyond the next day threshold, adjust the end to be the exclusive end of `endDay`.
  			// Otherwise, leaving it as inclusive will cause it to exclude `endDay`.
  			if (endTimeMS && endTimeMS >= this.nextDayThreshold) {
  				endDay.add(1, 'days');
  			}
  		}
  
  		// If no end was specified, or if it is within `startDay` but not past nextDayThreshold,
  		// assign the default duration of one day.
  		if (!end || endDay <= startDay) {
  			endDay = startDay.clone().add(1, 'days');
  		}
  
  		return { start: startDay, end: endDay };
  	},
  
  
  	// Does the given event visually appear to occupy more than one day?
  	isMultiDayEvent: function(event) {
  		var range = this.computeDayRange(event); // event is range-ish
  
  		return range.end.diff(range.start, 'days') > 1;
  	}
  
  });
  
  ;;
  
  /*
  Embodies a div that has potential scrollbars
  */
  var Scroller = FC.Scroller = Class.extend({
  
  	el: null, // the guaranteed outer element
  	scrollEl: null, // the element with the scrollbars
  	overflowX: null,
  	overflowY: null,
  
  
  	constructor: function(options) {
  		options = options || {};
  		this.overflowX = options.overflowX || options.overflow || 'auto';
  		this.overflowY = options.overflowY || options.overflow || 'auto';
  	},
  
  
  	render: function() {
  		this.el = this.renderEl();
  		this.applyOverflow();
  	},
  
  
  	renderEl: function() {
  		return (this.scrollEl = $('<div class="fc-scroller"></div>'));
  	},
  
  
  	// sets to natural height, unlocks overflow
  	clear: function() {
  		this.setHeight('auto');
  		this.applyOverflow();
  	},
  
  
  	destroy: function() {
  		this.el.remove();
  	},
  
  
  	// Overflow
  	// -----------------------------------------------------------------------------------------------------------------
  
  
  	applyOverflow: function() {
  		this.scrollEl.css({
  			'overflow-x': this.overflowX,
  			'overflow-y': this.overflowY
  		});
  	},
  
  
  	// Causes any 'auto' overflow values to resolves to 'scroll' or 'hidden'.
  	// Useful for preserving scrollbar widths regardless of future resizes.
  	// Can pass in scrollbarWidths for optimization.
  	lockOverflow: function(scrollbarWidths) {
  		var overflowX = this.overflowX;
  		var overflowY = this.overflowY;
  
  		scrollbarWidths = scrollbarWidths || this.getScrollbarWidths();
  
  		if (overflowX === 'auto') {
  			overflowX = (
  					scrollbarWidths.top || scrollbarWidths.bottom || // horizontal scrollbars?
  					// OR scrolling pane with massless scrollbars?
  					this.scrollEl[0].scrollWidth - 1 > this.scrollEl[0].clientWidth
  						// subtract 1 because of IE off-by-one issue
  				) ? 'scroll' : 'hidden';
  		}
  
  		if (overflowY === 'auto') {
  			overflowY = (
  					scrollbarWidths.left || scrollbarWidths.right || // vertical scrollbars?
  					// OR scrolling pane with massless scrollbars?
  					this.scrollEl[0].scrollHeight - 1 > this.scrollEl[0].clientHeight
  						// subtract 1 because of IE off-by-one issue
  				) ? 'scroll' : 'hidden';
  		}
  
  		this.scrollEl.css({ 'overflow-x': overflowX, 'overflow-y': overflowY });
  	},
  
  
  	// Getters / Setters
  	// -----------------------------------------------------------------------------------------------------------------
  
  
  	setHeight: function(height) {
  		this.scrollEl.height(height);
  	},
  
  
  	getScrollTop: function() {
  		return this.scrollEl.scrollTop();
  	},
  
  
  	setScrollTop: function(top) {
  		this.scrollEl.scrollTop(top);
  	},
  
  
  	getClientWidth: function() {
  		return this.scrollEl[0].clientWidth;
  	},
  
  
  	getClientHeight: function() {
  		return this.scrollEl[0].clientHeight;
  	},
  
  
  	getScrollbarWidths: function() {
  		return getScrollbarWidths(this.scrollEl);
  	}
  
  });
  
  ;;
  
  var Calendar = FC.Calendar = Class.extend({
  
  	dirDefaults: null, // option defaults related to LTR or RTL
  	localeDefaults: null, // option defaults related to current locale
  	overrides: null, // option overrides given to the fullCalendar constructor
  	dynamicOverrides: null, // options set with dynamic setter method. higher precedence than view overrides.
  	options: null, // all defaults combined with overrides
  	viewSpecCache: null, // cache of view definitions
  	view: null, // current View object
  	header: null,
  	loadingLevel: 0, // number of simultaneous loading tasks
  
  
  	// a lot of this class' OOP logic is scoped within this constructor function,
  	// but in the future, write individual methods on the prototype.
  	constructor: Calendar_constructor,
  
  
  	// Subclasses can override this for initialization logic after the constructor has been called
  	initialize: function() {
  	},
  
  
  	// Computes the flattened options hash for the calendar and assigns to `this.options`.
  	// Assumes this.overrides and this.dynamicOverrides have already been initialized.
  	populateOptionsHash: function() {
  		var locale, localeDefaults;
  		var isRTL, dirDefaults;
  
  		locale = firstDefined( // explicit locale option given?
  			this.dynamicOverrides.locale,
  			this.overrides.locale
  		);
  		localeDefaults = localeOptionHash[locale];
  		if (!localeDefaults) { // explicit locale option not given or invalid?
  			locale = Calendar.defaults.locale;
  			localeDefaults = localeOptionHash[locale] || {};
  		}
  
  		isRTL = firstDefined( // based on options computed so far, is direction RTL?
  			this.dynamicOverrides.isRTL,
  			this.overrides.isRTL,
  			localeDefaults.isRTL,
  			Calendar.defaults.isRTL
  		);
  		dirDefaults = isRTL ? Calendar.rtlDefaults : {};
  
  		this.dirDefaults = dirDefaults;
  		this.localeDefaults = localeDefaults;
  		this.options = mergeOptions([ // merge defaults and overrides. lowest to highest precedence
  			Calendar.defaults, // global defaults
  			dirDefaults,
  			localeDefaults,
  			this.overrides,
  			this.dynamicOverrides
  		]);
  		populateInstanceComputableOptions(this.options); // fill in gaps with computed options
  	},
  
  
  	// Gets information about how to create a view. Will use a cache.
  	getViewSpec: function(viewType) {
  		var cache = this.viewSpecCache;
  
  		return cache[viewType] || (cache[viewType] = this.buildViewSpec(viewType));
  	},
  
  
  	// Given a duration singular unit, like "week" or "day", finds a matching view spec.
  	// Preference is given to views that have corresponding buttons.
  	getUnitViewSpec: function(unit) {
  		var viewTypes;
  		var i;
  		var spec;
  
  		if ($.inArray(unit, intervalUnits) != -1) {
  
  			// put views that have buttons first. there will be duplicates, but oh well
  			viewTypes = this.header.getViewsWithButtons();
  			$.each(FC.views, function(viewType) { // all views
  				viewTypes.push(viewType);
  			});
  
  			for (i = 0; i < viewTypes.length; i++) {
  				spec = this.getViewSpec(viewTypes[i]);
  				if (spec) {
  					if (spec.singleUnit == unit) {
  						return spec;
  					}
  				}
  			}
  		}
  	},
  
  
  	// Builds an object with information on how to create a given view
  	buildViewSpec: function(requestedViewType) {
  		var viewOverrides = this.overrides.views || {};
  		var specChain = []; // for the view. lowest to highest priority
  		var defaultsChain = []; // for the view. lowest to highest priority
  		var overridesChain = []; // for the view. lowest to highest priority
  		var viewType = requestedViewType;
  		var spec; // for the view
  		var overrides; // for the view
  		var duration;
  		var unit;
  
  		// iterate from the specific view definition to a more general one until we hit an actual View class
  		while (viewType) {
  			spec = fcViews[viewType];
  			overrides = viewOverrides[viewType];
  			viewType = null; // clear. might repopulate for another iteration
  
  			if (typeof spec === 'function') { // TODO: deprecate
  				spec = { 'class': spec };
  			}
  
  			if (spec) {
  				specChain.unshift(spec);
  				defaultsChain.unshift(spec.defaults || {});
  				duration = duration || spec.duration;
  				viewType = viewType || spec.type;
  			}
  
  			if (overrides) {
  				overridesChain.unshift(overrides); // view-specific option hashes have options at zero-level
  				duration = duration || overrides.duration;
  				viewType = viewType || overrides.type;
  			}
  		}
  
  		spec = mergeProps(specChain);
  		spec.type = requestedViewType;
  		if (!spec['class']) {
  			return false;
  		}
  
  		if (duration) {
  			duration = moment.duration(duration);
  			if (duration.valueOf()) { // valid?
  				spec.duration = duration;
  				unit = computeIntervalUnit(duration);
  
  				// view is a single-unit duration, like "week" or "day"
  				// incorporate options for this. lowest priority
  				if (duration.as(unit) === 1) {
  					spec.singleUnit = unit;
  					overridesChain.unshift(viewOverrides[unit] || {});
  				}
  			}
  		}
  
  		spec.defaults = mergeOptions(defaultsChain);
  		spec.overrides = mergeOptions(overridesChain);
  
  		this.buildViewSpecOptions(spec);
  		this.buildViewSpecButtonText(spec, requestedViewType);
  
  		return spec;
  	},
  
  
  	// Builds and assigns a view spec's options object from its already-assigned defaults and overrides
  	buildViewSpecOptions: function(spec) {
  		spec.options = mergeOptions([ // lowest to highest priority
  			Calendar.defaults, // global defaults
  			spec.defaults, // view's defaults (from ViewSubclass.defaults)
  			this.dirDefaults,
  			this.localeDefaults, // locale and dir take precedence over view's defaults!
  			this.overrides, // calendar's overrides (options given to constructor)
  			spec.overrides, // view's overrides (view-specific options)
  			this.dynamicOverrides // dynamically set via setter. highest precedence
  		]);
  		populateInstanceComputableOptions(spec.options);
  	},
  
  
  	// Computes and assigns a view spec's buttonText-related options
  	buildViewSpecButtonText: function(spec, requestedViewType) {
  
  		// given an options object with a possible `buttonText` hash, lookup the buttonText for the
  		// requested view, falling back to a generic unit entry like "week" or "day"
  		function queryButtonText(options) {
  			var buttonText = options.buttonText || {};
  			return buttonText[requestedViewType] ||
  				// view can decide to look up a certain key
  				(spec.buttonTextKey ? buttonText[spec.buttonTextKey] : null) ||
  				// a key like "month"
  				(spec.singleUnit ? buttonText[spec.singleUnit] : null);
  		}
  
  		// highest to lowest priority
  		spec.buttonTextOverride =
  			queryButtonText(this.dynamicOverrides) ||
  			queryButtonText(this.overrides) || // constructor-specified buttonText lookup hash takes precedence
  			spec.overrides.buttonText; // `buttonText` for view-specific options is a string
  
  		// highest to lowest priority. mirrors buildViewSpecOptions
  		spec.buttonTextDefault =
  			queryButtonText(this.localeDefaults) ||
  			queryButtonText(this.dirDefaults) ||
  			spec.defaults.buttonText || // a single string. from ViewSubclass.defaults
  			queryButtonText(Calendar.defaults) ||
  			(spec.duration ? this.humanizeDuration(spec.duration) : null) || // like "3 days"
  			requestedViewType; // fall back to given view name
  	},
  
  
  	// Given a view name for a custom view or a standard view, creates a ready-to-go View object
  	instantiateView: function(viewType) {
  		var spec = this.getViewSpec(viewType);
  
  		return new spec['class'](this, viewType, spec.options, spec.duration);
  	},
  
  
  	// Returns a boolean about whether the view is okay to instantiate at some point
  	isValidViewType: function(viewType) {
  		return Boolean(this.getViewSpec(viewType));
  	},
  
  
  	// Should be called when any type of async data fetching begins
  	pushLoading: function() {
  		if (!(this.loadingLevel++)) {
  			this.trigger('loading', null, true, this.view);
  		}
  	},
  
  
  	// Should be called when any type of async data fetching completes
  	popLoading: function() {
  		if (!(--this.loadingLevel)) {
  			this.trigger('loading', null, false, this.view);
  		}
  	},
  
  
  	// Given arguments to the select method in the API, returns a span (unzoned start/end and other info)
  	buildSelectSpan: function(zonedStartInput, zonedEndInput) {
  		var start = this.moment(zonedStartInput).stripZone();
  		var end;
  
  		if (zonedEndInput) {
  			end = this.moment(zonedEndInput).stripZone();
  		}
  		else if (start.hasTime()) {
  			end = start.clone().add(this.defaultTimedEventDuration);
  		}
  		else {
  			end = start.clone().add(this.defaultAllDayEventDuration);
  		}
  
  		return { start: start, end: end };
  	}
  
  });
  
  
  Calendar.mixin(EmitterMixin);
  
  
  function Calendar_constructor(element, overrides) {
  	var t = this;
  
  
  	// Exports
  	// -----------------------------------------------------------------------------------
  
  	t.render = render;
  	t.destroy = destroy;
  	t.refetchEvents = refetchEvents;
  	t.refetchEventSources = refetchEventSources;
  	t.reportEvents = reportEvents;
  	t.reportEventChange = reportEventChange;
  	t.rerenderEvents = renderEvents; // `renderEvents` serves as a rerender. an API method
  	t.changeView = renderView; // `renderView` will switch to another view
  	t.select = select;
  	t.unselect = unselect;
  	t.prev = prev;
  	t.next = next;
  	t.prevYear = prevYear;
  	t.nextYear = nextYear;
  	t.today = today;
  	t.gotoDate = gotoDate;
  	t.incrementDate = incrementDate;
  	t.zoomTo = zoomTo;
  	t.getDate = getDate;
  	t.getCalendar = getCalendar;
  	t.getView = getView;
  	t.option = option; // getter/setter method
  	t.trigger = trigger;
  
  
  	// Options
  	// -----------------------------------------------------------------------------------
  
  	t.dynamicOverrides = {};
  	t.viewSpecCache = {};
  	t.optionHandlers = {}; // for Calendar.options.js
  	t.overrides = $.extend({}, overrides); // make a copy
  
  	t.populateOptionsHash(); // sets this.options
  
  
  
  	// Locale-data Internals
  	// -----------------------------------------------------------------------------------
  	// Apply overrides to the current locale's data
  
  	var localeData;
  
  	// Called immediately, and when any of the options change.
  	// Happens before any internal objects rebuild or rerender, because this is very core.
  	t.bindOptions([
  		'locale', 'monthNames', 'monthNamesShort', 'dayNames', 'dayNamesShort', 'firstDay', 'weekNumberCalculation'
  	], function(locale, monthNames, monthNamesShort, dayNames, dayNamesShort, firstDay, weekNumberCalculation) {
  
  		// normalize
  		if (weekNumberCalculation === 'iso') {
  			weekNumberCalculation = 'ISO'; // normalize
  		}
  
  		localeData = createObject( // make a cheap copy
  			getMomentLocaleData(locale) // will fall back to en
  		);
  
  		if (monthNames) {
  			localeData._months = monthNames;
  		}
  		if (monthNamesShort) {
  			localeData._monthsShort = monthNamesShort;
  		}
  		if (dayNames) {
  			localeData._weekdays = dayNames;
  		}
  		if (dayNamesShort) {
  			localeData._weekdaysShort = dayNamesShort;
  		}
  
  		if (firstDay == null && weekNumberCalculation === 'ISO') {
  			firstDay = 1;
  		}
  		if (firstDay != null) {
  			var _week = createObject(localeData._week); // _week: { dow: # }
  			_week.dow = firstDay;
  			localeData._week = _week;
  		}
  
  		if ( // whitelist certain kinds of input
  			weekNumberCalculation === 'ISO' ||
  			weekNumberCalculation === 'local' ||
  			typeof weekNumberCalculation === 'function'
  		) {
  			localeData._fullCalendar_weekCalc = weekNumberCalculation; // moment-ext will know what to do with it
  		}
  
  		// If the internal current date object already exists, move to new locale.
  		// We do NOT need to do this technique for event dates, because this happens when converting to "segments".
  		if (date) {
  			localizeMoment(date); // sets to localeData
  		}
  	});
  
  
  	// Calendar-specific Date Utilities
  	// -----------------------------------------------------------------------------------
  
  
  	t.defaultAllDayEventDuration = moment.duration(t.options.defaultAllDayEventDuration);
  	t.defaultTimedEventDuration = moment.duration(t.options.defaultTimedEventDuration);
  
  
  	// Builds a moment using the settings of the current calendar: timezone and locale.
  	// Accepts anything the vanilla moment() constructor accepts.
  	t.moment = function() {
  		var mom;
  
  		if (t.options.timezone === 'local') {
  			mom = FC.moment.apply(null, arguments);
  
  			// Force the moment to be local, because FC.moment doesn't guarantee it.
  			if (mom.hasTime()) { // don't give ambiguously-timed moments a local zone
  				mom.local();
  			}
  		}
  		else if (t.options.timezone === 'UTC') {
  			mom = FC.moment.utc.apply(null, arguments); // process as UTC
  		}
  		else {
  			mom = FC.moment.parseZone.apply(null, arguments); // let the input decide the zone
  		}
  
  		localizeMoment(mom);
  
  		return mom;
  	};
  
  
  	// Updates the given moment's locale settings to the current calendar locale settings.
  	function localizeMoment(mom) {
  		mom._locale = localeData;
  	}
  	t.localizeMoment = localizeMoment;
  
  
  	// Returns a boolean about whether or not the calendar knows how to calculate
  	// the timezone offset of arbitrary dates in the current timezone.
  	t.getIsAmbigTimezone = function() {
  		return t.options.timezone !== 'local' && t.options.timezone !== 'UTC';
  	};
  
  
  	// Returns a copy of the given date in the current timezone. Has no effect on dates without times.
  	t.applyTimezone = function(date) {
  		if (!date.hasTime()) {
  			return date.clone();
  		}
  
  		var zonedDate = t.moment(date.toArray());
  		var timeAdjust = date.time() - zonedDate.time();
  		var adjustedZonedDate;
  
  		// Safari sometimes has problems with this coersion when near DST. Adjust if necessary. (bug #2396)
  		if (timeAdjust) { // is the time result different than expected?
  			adjustedZonedDate = zonedDate.clone().add(timeAdjust); // add milliseconds
  			if (date.time() - adjustedZonedDate.time() === 0) { // does it match perfectly now?
  				zonedDate = adjustedZonedDate;
  			}
  		}
  
  		return zonedDate;
  	};
  
  
  	// Returns a moment for the current date, as defined by the client's computer or from the `now` option.
  	// Will return an moment with an ambiguous timezone.
  	t.getNow = function() {
  		var now = t.options.now;
  		if (typeof now === 'function') {
  			now = now();
  		}
  		return t.moment(now).stripZone();
  	};
  
  
  	// Get an event's normalized end date. If not present, calculate it from the defaults.
  	t.getEventEnd = function(event) {
  		if (event.end) {
  			return event.end.clone();
  		}
  		else {
  			return t.getDefaultEventEnd(event.allDay, event.start);
  		}
  	};
  
  
  	// Given an event's allDay status and start date, return what its fallback end date should be.
  	// TODO: rename to computeDefaultEventEnd
  	t.getDefaultEventEnd = function(allDay, zonedStart) {
  		var end = zonedStart.clone();
  
  		if (allDay) {
  			end.stripTime().add(t.defaultAllDayEventDuration);
  		}
  		else {
  			end.add(t.defaultTimedEventDuration);
  		}
  
  		if (t.getIsAmbigTimezone()) {
  			end.stripZone(); // we don't know what the tzo should be
  		}
  
  		return end;
  	};
  
  
  	// Produces a human-readable string for the given duration.
  	// Side-effect: changes the locale of the given duration.
  	t.humanizeDuration = function(duration) {
  		return duration.locale(t.options.locale).humanize();
  	};
  
  
  
  	// Imports
  	// -----------------------------------------------------------------------------------
  
  
  	EventManager.call(t);
  	var isFetchNeeded = t.isFetchNeeded;
  	var fetchEvents = t.fetchEvents;
  	var fetchEventSources = t.fetchEventSources;
  
  
  
  	// Locals
  	// -----------------------------------------------------------------------------------
  
  
  	var _element = element[0];
  	var header;
  	var content;
  	var tm; // for making theme classes
  	var currentView; // NOTE: keep this in sync with this.view
  	var viewsByType = {}; // holds all instantiated view instances, current or not
  	var suggestedViewHeight;
  	var windowResizeProxy; // wraps the windowResize function
  	var ignoreWindowResize = 0;
  	var events = [];
  	var date; // unzoned
  
  
  
  	// Main Rendering
  	// -----------------------------------------------------------------------------------
  
  
  	// compute the initial ambig-timezone date
  	if (t.options.defaultDate != null) {
  		date = t.moment(t.options.defaultDate).stripZone();
  	}
  	else {
  		date = t.getNow(); // getNow already returns unzoned
  	}
  
  
  	function render() {
  		if (!content) {
  			initialRender();
  		}
  		else if (elementVisible()) {
  			// mainly for the public API
  			calcSize();
  			renderView();
  		}
  	}
  
  
  	function initialRender() {
  		element.addClass('fc');
  
  		// event delegation for nav links
  		element.on('click.fc', 'a[data-goto]', function(ev) {
  			var anchorEl = $(this);
  			var gotoOptions = anchorEl.data('goto'); // will automatically parse JSON
  			var date = t.moment(gotoOptions.date);
  			var viewType = gotoOptions.type;
  
  			// property like "navLinkDayClick". might be a string or a function
  			var customAction = currentView.opt('navLink' + capitaliseFirstLetter(viewType) + 'Click');
  
  			if (typeof customAction === 'function') {
  				customAction(date, ev);
  			}
  			else {
  				if (typeof customAction === 'string') {
  					viewType = customAction;
  				}
  				zoomTo(date, viewType);
  			}
  		});
  
  		// called immediately, and upon option change
  		t.bindOption('theme', function(theme) {
  			tm = theme ? 'ui' : 'fc'; // affects a larger scope
  			element.toggleClass('ui-widget', theme);
  			element.toggleClass('fc-unthemed', !theme);
  		});
  
  		// called immediately, and upon option change.
  		// HACK: locale often affects isRTL, so we explicitly listen to that too.
  		t.bindOptions([ 'isRTL', 'locale' ], function(isRTL) {
  			element.toggleClass('fc-ltr', !isRTL);
  			element.toggleClass('fc-rtl', isRTL);
  		});
  
  		content = $("<div class='fc-view-container'/>").prependTo(element);
  
  		header = t.header = new Header(t);
  		renderHeader();
  
  		renderView(t.options.defaultView);
  
  		if (t.options.handleWindowResize) {
  			windowResizeProxy = debounce(windowResize, t.options.windowResizeDelay); // prevents rapid calls
  			$(window).resize(windowResizeProxy);
  		}
  	}
  
  
  	// can be called repeatedly and Header will rerender
  	function renderHeader() {
  		header.render();
  		if (header.el) {
  			element.prepend(header.el);
  		}
  	}
  
  
  	function destroy() {
  
  		if (currentView) {
  			currentView.removeElement();
  
  			// NOTE: don't null-out currentView/t.view in case API methods are called after destroy.
  			// It is still the "current" view, just not rendered.
  		}
  
  		header.removeElement();
  		content.remove();
  		element.removeClass('fc fc-ltr fc-rtl fc-unthemed ui-widget');
  
  		element.off('.fc'); // unbind nav link handlers
  
  		if (windowResizeProxy) {
  			$(window).unbind('resize', windowResizeProxy);
  		}
  	}
  
  
  	function elementVisible() {
  		return element.is(':visible');
  	}
  
  
  
  	// View Rendering
  	// -----------------------------------------------------------------------------------
  
  
  	// Renders a view because of a date change, view-type change, or for the first time.
  	// If not given a viewType, keep the current view but render different dates.
  	// Accepts an optional scroll state to restore to.
  	function renderView(viewType, explicitScrollState) {
  		ignoreWindowResize++;
  
  		// if viewType is changing, remove the old view's rendering
  		if (currentView && viewType && currentView.type !== viewType) {
  			freezeContentHeight(); // prevent a scroll jump when view element is removed
  			clearView();
  		}
  
  		// if viewType changed, or the view was never created, create a fresh view
  		if (!currentView && viewType) {
  			currentView = t.view =
  				viewsByType[viewType] ||
  				(viewsByType[viewType] = t.instantiateView(viewType));
  
  			currentView.setElement(
  				$("<div class='fc-view fc-" + viewType + "-view' />").appendTo(content)
  			);
  			header.activateButton(viewType);
  		}
  
  		if (currentView) {
  
  			// in case the view should render a period of time that is completely hidden
  			date = currentView.massageCurrentDate(date);
  
  			// render or rerender the view
  			if (
  				!currentView.displaying ||
  				!( // NOT within interval range signals an implicit date window change
  					date >= currentView.intervalStart &&
  					date < currentView.intervalEnd
  				)
  			) {
  				if (elementVisible()) {
  
  					currentView.display(date, explicitScrollState); // will call freezeContentHeight
  					unfreezeContentHeight(); // immediately unfreeze regardless of whether display is async
  
  					// need to do this after View::render, so dates are calculated
  					updateHeaderTitle();
  					updateTodayButton();
  
  					getAndRenderEvents();
  				}
  			}
  		}
  
  		unfreezeContentHeight(); // undo any lone freezeContentHeight calls
  		ignoreWindowResize--;
  	}
  
  
  	// Unrenders the current view and reflects this change in the Header.
  	// Unregsiters the `currentView`, but does not remove from viewByType hash.
  	function clearView() {
  		header.deactivateButton(currentView.type);
  		currentView.removeElement();
  		currentView = t.view = null;
  	}
  
  
  	// Destroys the view, including the view object. Then, re-instantiates it and renders it.
  	// Maintains the same scroll state.
  	// TODO: maintain any other user-manipulated state.
  	function reinitView() {
  		ignoreWindowResize++;
  		freezeContentHeight();
  
  		var viewType = currentView.type;
  		var scrollState = currentView.queryScroll();
  		clearView();
  		renderView(viewType, scrollState);
  
  		unfreezeContentHeight();
  		ignoreWindowResize--;
  	}
  
  
  
  	// Resizing
  	// -----------------------------------------------------------------------------------
  
  
  	t.getSuggestedViewHeight = function() {
  		if (suggestedViewHeight === undefined) {
  			calcSize();
  		}
  		return suggestedViewHeight;
  	};
  
  
  	t.isHeightAuto = function() {
  		return t.options.contentHeight === 'auto' || t.options.height === 'auto';
  	};
  
  
  	function updateSize(shouldRecalc) {
  		if (elementVisible()) {
  
  			if (shouldRecalc) {
  				_calcSize();
  			}
  
  			ignoreWindowResize++;
  			currentView.updateSize(true); // isResize=true. will poll getSuggestedViewHeight() and isHeightAuto()
  			ignoreWindowResize--;
  
  			return true; // signal success
  		}
  	}
  
  
  	function calcSize() {
  		if (elementVisible()) {
  			_calcSize();
  		}
  	}
  
  
  	function _calcSize() { // assumes elementVisible
  		var contentHeightInput = t.options.contentHeight;
  		var heightInput = t.options.height;
  
  		if (typeof contentHeightInput === 'number') { // exists and not 'auto'
  			suggestedViewHeight = contentHeightInput;
  		}
  		else if (typeof contentHeightInput === 'function') { // exists and is a function
  			suggestedViewHeight = contentHeightInput();
  		}
  		else if (typeof heightInput === 'number') { // exists and not 'auto'
  			suggestedViewHeight = heightInput - queryHeaderHeight();
  		}
  		else if (typeof heightInput === 'function') { // exists and is a function
  			suggestedViewHeight = heightInput() - queryHeaderHeight();
  		}
  		else if (heightInput === 'parent') { // set to height of parent element
  			suggestedViewHeight = element.parent().height() - queryHeaderHeight();
  		}
  		else {
  			suggestedViewHeight = Math.round(content.width() / Math.max(t.options.aspectRatio, .5));
  		}
  	}
  
  
  	function queryHeaderHeight() {
  		return header.el ? header.el.outerHeight(true) : 0; // includes margin
  	}
  
  
  	function windowResize(ev) {
  		if (
  			!ignoreWindowResize &&
  			ev.target === window && // so we don't process jqui "resize" events that have bubbled up
  			currentView.start // view has already been rendered
  		) {
  			if (updateSize(true)) {
  				currentView.trigger('windowResize', _element);
  			}
  		}
  	}
  
  
  
  	/* Event Fetching/Rendering
  	-----------------------------------------------------------------------------*/
  	// TODO: going forward, most of this stuff should be directly handled by the view
  
  
  	function refetchEvents() { // can be called as an API method
  		fetchAndRenderEvents();
  	}
  
  
  	// TODO: move this into EventManager?
  	function refetchEventSources(matchInputs) {
  		fetchEventSources(t.getEventSourcesByMatchArray(matchInputs));
  	}
  
  
  	function renderEvents() { // destroys old events if previously rendered
  		if (elementVisible()) {
  			freezeContentHeight();
  			currentView.displayEvents(events);
  			unfreezeContentHeight();
  		}
  	}
  
  
  	function getAndRenderEvents() {
  		if (!t.options.lazyFetching || isFetchNeeded(currentView.start, currentView.end)) {
  			fetchAndRenderEvents();
  		}
  		else {
  			renderEvents();
  		}
  	}
  
  
  	function fetchAndRenderEvents() {
  		fetchEvents(currentView.start, currentView.end);
  			// ... will call reportEvents
  			// ... which will call renderEvents
  	}
  
  
  	// called when event data arrives
  	function reportEvents(_events) {
  		events = _events;
  		renderEvents();
  	}
  
  
  	// called when a single event's data has been changed
  	function reportEventChange() {
  		renderEvents();
  	}
  
  
  
  	/* Header Updating
  	-----------------------------------------------------------------------------*/
  
  
  	function updateHeaderTitle() {
  		header.updateTitle(currentView.title);
  	}
  
  
  	function updateTodayButton() {
  		var now = t.getNow();
  
  		if (now >= currentView.intervalStart && now < currentView.intervalEnd) {
  			header.disableButton('today');
  		}
  		else {
  			header.enableButton('today');
  		}
  	}
  
  
  
  	/* Selection
  	-----------------------------------------------------------------------------*/
  
  
  	// this public method receives start/end dates in any format, with any timezone
  	function select(zonedStartInput, zonedEndInput) {
  		currentView.select(
  			t.buildSelectSpan.apply(t, arguments)
  		);
  	}
  
  
  	function unselect() { // safe to be called before renderView
  		if (currentView) {
  			currentView.unselect();
  		}
  	}
  
  
  
  	/* Date
  	-----------------------------------------------------------------------------*/
  
  
  	function prev() {
  		date = currentView.computePrevDate(date);
  		renderView();
  	}
  
  
  	function next() {
  		date = currentView.computeNextDate(date);
  		renderView();
  	}
  
  
  	function prevYear() {
  		date.add(-1, 'years');
  		renderView();
  	}
  
  
  	function nextYear() {
  		date.add(1, 'years');
  		renderView();
  	}
  
  
  	function today() {
  		date = t.getNow();
  		renderView();
  	}
  
  
  	function gotoDate(zonedDateInput) {
  		date = t.moment(zonedDateInput).stripZone();
  		renderView();
  	}
  
  
  	function incrementDate(delta) {
  		date.add(moment.duration(delta));
  		renderView();
  	}
  
  
  	// Forces navigation to a view for the given date.
  	// `viewType` can be a specific view name or a generic one like "week" or "day".
  	function zoomTo(newDate, viewType) {
  		var spec;
  
  		viewType = viewType || 'day'; // day is default zoom
  		spec = t.getViewSpec(viewType) || t.getUnitViewSpec(viewType);
  
  		date = newDate.clone();
  		renderView(spec ? spec.type : null);
  	}
  
  
  	// for external API
  	function getDate() {
  		return t.applyTimezone(date); // infuse the calendar's timezone
  	}
  
  
  
  	/* Height "Freezing"
  	-----------------------------------------------------------------------------*/
  	// TODO: move this into the view
  
  	t.freezeContentHeight = freezeContentHeight;
  	t.unfreezeContentHeight = unfreezeContentHeight;
  
  
  	function freezeContentHeight() {
  		content.css({
  			width: '100%',
  			height: content.height(),
  			overflow: 'hidden'
  		});
  	}
  
  
  	function unfreezeContentHeight() {
  		content.css({
  			width: '',
  			height: '',
  			overflow: ''
  		});
  	}
  
  
  
  	/* Misc
  	-----------------------------------------------------------------------------*/
  
  
  	function getCalendar() {
  		return t;
  	}
  
  
  	function getView() {
  		return currentView;
  	}
  
  
  	function option(name, value) {
  		var newOptionHash;
  
  		if (typeof name === 'string') {
  			if (value === undefined) { // getter
  				return t.options[name];
  			}
  			else { // setter for individual option
  				newOptionHash = {};
  				newOptionHash[name] = value;
  				setOptions(newOptionHash);
  			}
  		}
  		else if (typeof name === 'object') { // compound setter with object input
  			setOptions(name);
  		}
  	}
  
  
  	function setOptions(newOptionHash) {
  		var optionCnt = 0;
  		var optionName;
  
  		for (optionName in newOptionHash) {
  			t.dynamicOverrides[optionName] = newOptionHash[optionName];
  		}
  
  		t.viewSpecCache = {}; // the dynamic override invalidates the options in this cache, so just clear it
  		t.populateOptionsHash(); // this.options needs to be recomputed after the dynamic override
  
  		// trigger handlers after this.options has been updated
  		for (optionName in newOptionHash) {
  			t.triggerOptionHandlers(optionName); // recall bindOption/bindOptions
  			optionCnt++;
  		}
  
  		// special-case handling of single option change.
  		// if only one option change, `optionName` will be its name.
  		if (optionCnt === 1) {
  			if (optionName === 'height' || optionName === 'contentHeight' || optionName === 'aspectRatio') {
  				updateSize(true); // true = allow recalculation of height
  				return;
  			}
  			else if (optionName === 'defaultDate') {
  				return; // can't change date this way. use gotoDate instead
  			}
  			else if (optionName === 'businessHours') {
  				if (currentView) {
  					currentView.unrenderBusinessHours();
  					currentView.renderBusinessHours();
  				}
  				return;
  			}
  			else if (optionName === 'timezone') {
  				t.rezoneArrayEventSources();
  				refetchEvents();
  				return;
  			}
  		}
  
  		// catch-all. rerender the header and rebuild/rerender the current view
  		renderHeader();
  		viewsByType = {}; // even non-current views will be affected by this option change. do before rerender
  		reinitView();
  	}
  
  
  	function trigger(name, thisObj) { // overrides the Emitter's trigger method :(
  		var args = Array.prototype.slice.call(arguments, 2);
  
  		thisObj = thisObj || _element;
  		this.triggerWith(name, thisObj, args); // Emitter's method
  
  		if (t.options[name]) {
  			return t.options[name].apply(thisObj, args);
  		}
  	}
  
  	t.initialize();
  }
  
  ;;
  /*
  Options binding/triggering system.
  */
  Calendar.mixin({
  
  	// A map of option names to arrays of handler objects. Initialized to {} in Calendar.
  	// Format for a handler object:
  	// {
  	//   func // callback function to be called upon change
  	//   names // option names whose values should be given to func
  	// }
  	optionHandlers: null,
  
  	// Calls handlerFunc immediately, and when the given option has changed.
  	// handlerFunc will be given the option value.
  	bindOption: function(optionName, handlerFunc) {
  		this.bindOptions([ optionName ], handlerFunc);
  	},
  
  	// Calls handlerFunc immediately, and when any of the given options change.
  	// handlerFunc will be given each option value as ordered function arguments.
  	bindOptions: function(optionNames, handlerFunc) {
  		var handlerObj = { func: handlerFunc, names: optionNames };
  		var i;
  
  		for (i = 0; i < optionNames.length; i++) {
  			this.registerOptionHandlerObj(optionNames[i], handlerObj);
  		}
  
  		this.triggerOptionHandlerObj(handlerObj);
  	},
  
  	// Puts the given handler object into the internal hash
  	registerOptionHandlerObj: function(optionName, handlerObj) {
  		(this.optionHandlers[optionName] || (this.optionHandlers[optionName] = []))
  			.push(handlerObj);
  	},
  
  	// Reports that the given option has changed, and calls all appropriate handlers.
  	triggerOptionHandlers: function(optionName) {
  		var handlerObjs = this.optionHandlers[optionName] || [];
  		var i;
  
  		for (i = 0; i < handlerObjs.length; i++) {
  			this.triggerOptionHandlerObj(handlerObjs[i]);
  		}
  	},
  
  	// Calls the callback for a specific handler object, passing in the appropriate arguments.
  	triggerOptionHandlerObj: function(handlerObj) {
  		var optionNames = handlerObj.names;
  		var optionValues = [];
  		var i;
  
  		for (i = 0; i < optionNames.length; i++) {
  			optionValues.push(this.options[optionNames[i]]);
  		}
  
  		handlerObj.func.apply(this, optionValues); // maintain the Calendar's `this` context
  	}
  
  });
  
  ;;
  
  Calendar.defaults = {
  
  	titleRangeSeparator: ' \u2013 ', // en dash
  	monthYearFormat: 'MMMM YYYY', // required for en. other locales rely on datepicker computable option
  
  	defaultTimedEventDuration: '02:00:00',
  	defaultAllDayEventDuration: { days: 1 },
  	forceEventDuration: false,
  	nextDayThreshold: '09:00:00', // 9am
  
  	// display
  	defaultView: 'month',
  	aspectRatio: 1.35,
  	header: {
  		left: 'title',
  		center: '',
  		right: 'today prev,next'
  	},
  	weekends: true,
  	weekNumbers: false,
  
  	weekNumberTitle: 'W',
  	weekNumberCalculation: 'local',
  
  	//editable: false,
  
  	//nowIndicator: false,
  
  	scrollTime: '06:00:00',
  
  	// event ajax
  	lazyFetching: true,
  	startParam: 'start',
  	endParam: 'end',
  	timezoneParam: 'timezone',
  
  	timezone: false,
  
  	//allDayDefault: undefined,
  
  	// locale
  	isRTL: false,
  	buttonText: {
  		prev: "prev",
  		next: "next",
  		prevYear: "prev year",
  		nextYear: "next year",
  		year: 'year', // TODO: locale files need to specify this
  		today: 'today',
  		month: 'month',
  		week: 'week',
  		day: 'day'
  	},
  
  	buttonIcons: {
  		prev: 'left-single-arrow',
  		next: 'right-single-arrow',
  		prevYear: 'left-double-arrow',
  		nextYear: 'right-double-arrow'
  	},
  
  	allDayText: 'all-day',
  
  	// jquery-ui theming
  	theme: false,
  	themeButtonIcons: {
  		prev: 'circle-triangle-w',
  		next: 'circle-triangle-e',
  		prevYear: 'seek-prev',
  		nextYear: 'seek-next'
  	},
  
  	//eventResizableFromStart: false,
  	dragOpacity: .75,
  	dragRevertDuration: 500,
  	dragScroll: true,
  
  	//selectable: false,
  	unselectAuto: true,
  
  	dropAccept: '*',
  
  	eventOrder: 'title',
  
  	eventLimit: false,
  	eventLimitText: 'more',
  	eventLimitClick: 'popover',
  	dayPopoverFormat: 'LL',
  
  	handleWindowResize: true,
  	windowResizeDelay: 100, // milliseconds before an updateSize happens
  
  	longPressDelay: 1000
  
  };
  
  
  Calendar.englishDefaults = { // used by locale.js
  	dayPopoverFormat: 'dddd, MMMM D'
  };
  
  
  Calendar.rtlDefaults = { // right-to-left defaults
  	header: { // TODO: smarter solution (first/center/last ?)
  		left: 'next,prev today',
  		center: '',
  		right: 'title'
  	},
  	buttonIcons: {
  		prev: 'right-single-arrow',
  		next: 'left-single-arrow',
  		prevYear: 'right-double-arrow',
  		nextYear: 'left-double-arrow'
  	},
  	themeButtonIcons: {
  		prev: 'circle-triangle-e',
  		next: 'circle-triangle-w',
  		nextYear: 'seek-prev',
  		prevYear: 'seek-next'
  	}
  };
  
  ;;
  
  var localeOptionHash = FC.locales = {}; // initialize and expose
  
  
  // TODO: document the structure and ordering of a FullCalendar locale file
  
  
  // Initialize jQuery UI datepicker translations while using some of the translations
  // Will set this as the default locales for datepicker.
  FC.datepickerLocale = function(localeCode, dpLocaleCode, dpOptions) {
  
  	// get the FullCalendar internal option hash for this locale. create if necessary
  	var fcOptions = localeOptionHash[localeCode] || (localeOptionHash[localeCode] = {});
  
  	// transfer some simple options from datepicker to fc
  	fcOptions.isRTL = dpOptions.isRTL;
  	fcOptions.weekNumberTitle = dpOptions.weekHeader;
  
  	// compute some more complex options from datepicker
  	$.each(dpComputableOptions, function(name, func) {
  		fcOptions[name] = func(dpOptions);
  	});
  
  	// is jQuery UI Datepicker is on the page?
  	if ($.datepicker) {
  
  		// Register the locale data.
  		// FullCalendar and MomentJS use locale codes like "pt-br" but Datepicker
  		// does it like "pt-BR" or if it doesn't have the locale, maybe just "pt".
  		// Make an alias so the locale can be referenced either way.
  		$.datepicker.regional[dpLocaleCode] =
  			$.datepicker.regional[localeCode] = // alias
  				dpOptions;
  
  		// Alias 'en' to the default locale data. Do this every time.
  		$.datepicker.regional.en = $.datepicker.regional[''];
  
  		// Set as Datepicker's global defaults.
  		$.datepicker.setDefaults(dpOptions);
  	}
  };
  
  
  // Sets FullCalendar-specific translations. Will set the locales as the global default.
  FC.locale = function(localeCode, newFcOptions) {
  	var fcOptions;
  	var momOptions;
  
  	// get the FullCalendar internal option hash for this locale. create if necessary
  	fcOptions = localeOptionHash[localeCode] || (localeOptionHash[localeCode] = {});
  
  	// provided new options for this locales? merge them in
  	if (newFcOptions) {
  		fcOptions = localeOptionHash[localeCode] = mergeOptions([ fcOptions, newFcOptions ]);
  	}
  
  	// compute locale options that weren't defined.
  	// always do this. newFcOptions can be undefined when initializing from i18n file,
  	// so no way to tell if this is an initialization or a default-setting.
  	momOptions = getMomentLocaleData(localeCode); // will fall back to en
  	$.each(momComputableOptions, function(name, func) {
  		if (fcOptions[name] == null) {
  			fcOptions[name] = func(momOptions, fcOptions);
  		}
  	});
  
  	// set it as the default locale for FullCalendar
  	Calendar.defaults.locale = localeCode;
  };
  
  
  // NOTE: can't guarantee any of these computations will run because not every locale has datepicker
  // configs, so make sure there are English fallbacks for these in the defaults file.
  var dpComputableOptions = {
  
  	buttonText: function(dpOptions) {
  		return {
  			// the translations sometimes wrongly contain HTML entities
  			prev: stripHtmlEntities(dpOptions.prevText),
  			next: stripHtmlEntities(dpOptions.nextText),
  			today: stripHtmlEntities(dpOptions.currentText)
  		};
  	},
  
  	// Produces format strings like "MMMM YYYY" -> "September 2014"
  	monthYearFormat: function(dpOptions) {
  		return dpOptions.showMonthAfterYear ?
  			'YYYY[' + dpOptions.yearSuffix + '] MMMM' :
  			'MMMM YYYY[' + dpOptions.yearSuffix + ']';
  	}
  
  };
  
  var momComputableOptions = {
  
  	// Produces format strings like "ddd M/D" -> "Fri 9/15"
  	dayOfMonthFormat: function(momOptions, fcOptions) {
  		var format = momOptions.longDateFormat('l'); // for the format like "M/D/YYYY"
  
  		// strip the year off the edge, as well as other misc non-whitespace chars
  		format = format.replace(/^Y+[^\w\s]*|[^\w\s]*Y+$/g, '');
  
  		if (fcOptions.isRTL) {
  			format += ' ddd'; // for RTL, add day-of-week to end
  		}
  		else {
  			format = 'ddd ' + format; // for LTR, add day-of-week to beginning
  		}
  		return format;
  	},
  
  	// Produces format strings like "h:mma" -> "6:00pm"
  	mediumTimeFormat: function(momOptions) { // can't be called `timeFormat` because collides with option
  		return momOptions.longDateFormat('LT')
  			.replace(/\s*a$/i, 'a'); // convert AM/PM/am/pm to lowercase. remove any spaces beforehand
  	},
  
  	// Produces format strings like "h(:mm)a" -> "6pm" / "6:30pm"
  	smallTimeFormat: function(momOptions) {
  		return momOptions.longDateFormat('LT')
  			.replace(':mm', '(:mm)')
  			.replace(/(\Wmm)$/, '($1)') // like above, but for foreign locales
  			.replace(/\s*a$/i, 'a'); // convert AM/PM/am/pm to lowercase. remove any spaces beforehand
  	},
  
  	// Produces format strings like "h(:mm)t" -> "6p" / "6:30p"
  	extraSmallTimeFormat: function(momOptions) {
  		return momOptions.longDateFormat('LT')
  			.replace(':mm', '(:mm)')
  			.replace(/(\Wmm)$/, '($1)') // like above, but for foreign locales
  			.replace(/\s*a$/i, 't'); // convert to AM/PM/am/pm to lowercase one-letter. remove any spaces beforehand
  	},
  
  	// Produces format strings like "ha" / "H" -> "6pm" / "18"
  	hourFormat: function(momOptions) {
  		return momOptions.longDateFormat('LT')
  			.replace(':mm', '')
  			.replace(/(\Wmm)$/, '') // like above, but for foreign locales
  			.replace(/\s*a$/i, 'a'); // convert AM/PM/am/pm to lowercase. remove any spaces beforehand
  	},
  
  	// Produces format strings like "h:mm" -> "6:30" (with no AM/PM)
  	noMeridiemTimeFormat: function(momOptions) {
  		return momOptions.longDateFormat('LT')
  			.replace(/\s*a$/i, ''); // remove trailing AM/PM
  	}
  
  };
  
  
  // options that should be computed off live calendar options (considers override options)
  // TODO: best place for this? related to locale?
  // TODO: flipping text based on isRTL is a bad idea because the CSS `direction` might want to handle it
  var instanceComputableOptions = {
  
  	// Produces format strings for results like "Mo 16"
  	smallDayDateFormat: function(options) {
  		return options.isRTL ?
  			'D dd' :
  			'dd D';
  	},
  
  	// Produces format strings for results like "Wk 5"
  	weekFormat: function(options) {
  		return options.isRTL ?
  			'w[ ' + options.weekNumberTitle + ']' :
  			'[' + options.weekNumberTitle + ' ]w';
  	},
  
  	// Produces format strings for results like "Wk5"
  	smallWeekFormat: function(options) {
  		return options.isRTL ?
  			'w[' + options.weekNumberTitle + ']' :
  			'[' + options.weekNumberTitle + ']w';
  	}
  
  };
  
  function populateInstanceComputableOptions(options) {
  	$.each(instanceComputableOptions, function(name, func) {
  		if (options[name] == null) {
  			options[name] = func(options);
  		}
  	});
  }
  
  
  // Returns moment's internal locale data. If doesn't exist, returns English.
  function getMomentLocaleData(localeCode) {
  	return moment.localeData(localeCode) || moment.localeData('en');
  }
  
  
  // Initialize English by forcing computation of moment-derived options.
  // Also, sets it as the default.
  FC.locale('en', Calendar.englishDefaults);
  
  ;;
  
  /* Top toolbar area with buttons and title
  ----------------------------------------------------------------------------------------------------------------------*/
  // TODO: rename all header-related things to "toolbar"
  
  function Header(calendar) {
  	var t = this;
  
  	// exports
  	t.render = render;
  	t.removeElement = removeElement;
  	t.updateTitle = updateTitle;
  	t.activateButton = activateButton;
  	t.deactivateButton = deactivateButton;
  	t.disableButton = disableButton;
  	t.enableButton = enableButton;
  	t.getViewsWithButtons = getViewsWithButtons;
  	t.el = null; // mirrors local `el`
  
  	// locals
  	var el;
  	var viewsWithButtons = [];
  	var tm;
  
  
  	// can be called repeatedly and will rerender
  	function render() {
  		var options = calendar.options;
  		var sections = options.header;
  
  		tm = options.theme ? 'ui' : 'fc';
  
  		if (sections) {
  			if (!el) {
  				el = this.el = $("<div class='fc-toolbar'/>");
  			}
  			else {
  				el.empty();
  			}
  			el.append(renderSection('left'))
  				.append(renderSection('right'))
  				.append(renderSection('center'))
  				.append('<div class="fc-clear"/>');
  		}
  		else {
  			removeElement();
  		}
  	}
  
  
  	function removeElement() {
  		if (el) {
  			el.remove();
  			el = t.el = null;
  		}
  	}
  
  
  	function renderSection(position) {
  		var sectionEl = $('<div class="fc-' + position + '"/>');
  		var options = calendar.options;
  		var buttonStr = options.header[position];
  
  		if (buttonStr) {
  			$.each(buttonStr.split(' '), function(i) {
  				var groupChildren = $();
  				var isOnlyButtons = true;
  				var groupEl;
  
  				$.each(this.split(','), function(j, buttonName) {
  					var customButtonProps;
  					var viewSpec;
  					var buttonClick;
  					var overrideText; // text explicitly set by calendar's constructor options. overcomes icons
  					var defaultText;
  					var themeIcon;
  					var normalIcon;
  					var innerHtml;
  					var classes;
  					var button; // the element
  
  					if (buttonName == 'title') {
  						groupChildren = groupChildren.add($('<h2>&nbsp;</h2>')); // we always want it to take up height
  						isOnlyButtons = false;
  					}
  					else {
  						if ((customButtonProps = (options.customButtons || {})[buttonName])) {
  							buttonClick = function(ev) {
  								if (customButtonProps.click) {
  									customButtonProps.click.call(button[0], ev);
  								}
  							};
  							overrideText = ''; // icons will override text
  							defaultText = customButtonProps.text;
  						}
  						else if ((viewSpec = calendar.getViewSpec(buttonName))) {
  							buttonClick = function() {
  								calendar.changeView(buttonName);
  							};
  							viewsWithButtons.push(buttonName);
  							overrideText = viewSpec.buttonTextOverride;
  							defaultText = viewSpec.buttonTextDefault;
  						}
  						else if (calendar[buttonName]) { // a calendar method
  							buttonClick = function() {
  								calendar[buttonName]();
  							};
  							overrideText = (calendar.overrides.buttonText || {})[buttonName];
  							defaultText = options.buttonText[buttonName]; // everything else is considered default
  						}
  
  						if (buttonClick) {
  
  							themeIcon =
  								customButtonProps ?
  									customButtonProps.themeIcon :
  									options.themeButtonIcons[buttonName];
  
  							normalIcon =
  								customButtonProps ?
  									customButtonProps.icon :
  									options.buttonIcons[buttonName];
  
  							if (overrideText) {
  								innerHtml = htmlEscape(overrideText);
  							}
  							else if (themeIcon && options.theme) {
  								innerHtml = "<span class='ui-icon ui-icon-" + themeIcon + "'></span>";
  							}
  							else if (normalIcon && !options.theme) {
  								innerHtml = "<span class='fc-icon fc-icon-" + normalIcon + "'></span>";
  							}
  							else {
  								innerHtml = htmlEscape(defaultText);
  							}
  
  							classes = [
  								'fc-' + buttonName + '-button',
  								tm + '-button',
  								tm + '-state-default'
  							];
  
  							button = $( // type="button" so that it doesn't submit a form
  								'<button type="button" class="' + classes.join(' ') + '">' +
  									innerHtml +
  								'</button>'
  								)
  								.click(function(ev) {
  									// don't process clicks for disabled buttons
  									if (!button.hasClass(tm + '-state-disabled')) {
  
  										buttonClick(ev);
  
  										// after the click action, if the button becomes the "active" tab, or disabled,
  										// it should never have a hover class, so remove it now.
  										if (
  											button.hasClass(tm + '-state-active') ||
  											button.hasClass(tm + '-state-disabled')
  										) {
  											button.removeClass(tm + '-state-hover');
  										}
  									}
  								})
  								.mousedown(function() {
  									// the *down* effect (mouse pressed in).
  									// only on buttons that are not the "active" tab, or disabled
  									button
  										.not('.' + tm + '-state-active')
  										.not('.' + tm + '-state-disabled')
  										.addClass(tm + '-state-down');
  								})
  								.mouseup(function() {
  									// undo the *down* effect
  									button.removeClass(tm + '-state-down');
  								})
  								.hover(
  									function() {
  										// the *hover* effect.
  										// only on buttons that are not the "active" tab, or disabled
  										button
  											.not('.' + tm + '-state-active')
  											.not('.' + tm + '-state-disabled')
  											.addClass(tm + '-state-hover');
  									},
  									function() {
  										// undo the *hover* effect
  										button
  											.removeClass(tm + '-state-hover')
  											.removeClass(tm + '-state-down'); // if mouseleave happens before mouseup
  									}
  								);
  
  							groupChildren = groupChildren.add(button);
  						}
  					}
  				});
  
  				if (isOnlyButtons) {
  					groupChildren
  						.first().addClass(tm + '-corner-left').end()
  						.last().addClass(tm + '-corner-right').end();
  				}
  
  				if (groupChildren.length > 1) {
  					groupEl = $('<div/>');
  					if (isOnlyButtons) {
  						groupEl.addClass('fc-button-group');
  					}
  					groupEl.append(groupChildren);
  					sectionEl.append(groupEl);
  				}
  				else {
  					sectionEl.append(groupChildren); // 1 or 0 children
  				}
  			});
  		}
  
  		return sectionEl;
  	}
  
  
  	function updateTitle(text) {
  		if (el) {
  			el.find('h2').text(text);
  		}
  	}
  
  
  	function activateButton(buttonName) {
  		if (el) {
  			el.find('.fc-' + buttonName + '-button')
  				.addClass(tm + '-state-active');
  		}
  	}
  
  
  	function deactivateButton(buttonName) {
  		if (el) {
  			el.find('.fc-' + buttonName + '-button')
  				.removeClass(tm + '-state-active');
  		}
  	}
  
  
  	function disableButton(buttonName) {
  		if (el) {
  			el.find('.fc-' + buttonName + '-button')
  				.prop('disabled', true)
  				.addClass(tm + '-state-disabled');
  		}
  	}
  
  
  	function enableButton(buttonName) {
  		if (el) {
  			el.find('.fc-' + buttonName + '-button')
  				.prop('disabled', false)
  				.removeClass(tm + '-state-disabled');
  		}
  	}
  
  
  	function getViewsWithButtons() {
  		return viewsWithButtons;
  	}
  
  }
  
  ;;
  
  FC.sourceNormalizers = [];
  FC.sourceFetchers = [];
  
  var ajaxDefaults = {
  	dataType: 'json',
  	cache: false
  };
  
  var eventGUID = 1;
  
  
  function EventManager() { // assumed to be a calendar
  	var t = this;
  
  
  	// exports
  	t.isFetchNeeded = isFetchNeeded;
  	t.fetchEvents = fetchEvents;
  	t.fetchEventSources = fetchEventSources;
  	t.getEventSources = getEventSources;
  	t.getEventSourceById = getEventSourceById;
  	t.getEventSourcesByMatchArray = getEventSourcesByMatchArray;
  	t.getEventSourcesByMatch = getEventSourcesByMatch;
  	t.addEventSource = addEventSource;
  	t.removeEventSource = removeEventSource;
  	t.removeEventSources = removeEventSources;
  	t.updateEvent = updateEvent;
  	t.renderEvent = renderEvent;
  	t.removeEvents = removeEvents;
  	t.clientEvents = clientEvents;
  	t.mutateEvent = mutateEvent;
  	t.normalizeEventDates = normalizeEventDates;
  	t.normalizeEventTimes = normalizeEventTimes;
  
  
  	// imports
  	var reportEvents = t.reportEvents;
  
  
  	// locals
  	var stickySource = { events: [] };
  	var sources = [ stickySource ];
  	var rangeStart, rangeEnd;
  	var pendingSourceCnt = 0; // outstanding fetch requests, max one per source
  	var cache = []; // holds events that have already been expanded
  
  
  	$.each(
  		(t.options.events ? [ t.options.events ] : []).concat(t.options.eventSources || []),
  		function(i, sourceInput) {
  			var source = buildEventSource(sourceInput);
  			if (source) {
  				sources.push(source);
  			}
  		}
  	);
  
  
  
  	/* Fetching
  	-----------------------------------------------------------------------------*/
  
  
  	// start and end are assumed to be unzoned
  	function isFetchNeeded(start, end) {
  		return !rangeStart || // nothing has been fetched yet?
  			start < rangeStart || end > rangeEnd; // is part of the new range outside of the old range?
  	}
  
  
  	function fetchEvents(start, end) {
  		rangeStart = start;
  		rangeEnd = end;
  		fetchEventSources(sources, 'reset');
  	}
  
  
  	// expects an array of event source objects (the originals, not copies)
  	// `specialFetchType` is an optimization parameter that affects purging of the event cache.
  	function fetchEventSources(specificSources, specialFetchType) {
  		var i, source;
  
  		if (specialFetchType === 'reset') {
  			cache = [];
  		}
  		else if (specialFetchType !== 'add') {
  			cache = excludeEventsBySources(cache, specificSources);
  		}
  
  		for (i = 0; i < specificSources.length; i++) {
  			source = specificSources[i];
  
  			// already-pending sources have already been accounted for in pendingSourceCnt
  			if (source._status !== 'pending') {
  				pendingSourceCnt++;
  			}
  
  			source._fetchId = (source._fetchId || 0) + 1;
  			source._status = 'pending';
  		}
  
  		for (i = 0; i < specificSources.length; i++) {
  			source = specificSources[i];
  
  			tryFetchEventSource(source, source._fetchId);
  		}
  	}
  
  
  	// fetches an event source and processes its result ONLY if it is still the current fetch.
  	// caller is responsible for incrementing pendingSourceCnt first.
  	function tryFetchEventSource(source, fetchId) {
  		_fetchEventSource(source, function(eventInputs) {
  			var isArraySource = $.isArray(source.events);
  			var i, eventInput;
  			var abstractEvent;
  
  			if (
  				// is this the source's most recent fetch?
  				// if not, rely on an upcoming fetch of this source to decrement pendingSourceCnt
  				fetchId === source._fetchId &&
  				// event source no longer valid?
  				source._status !== 'rejected'
  			) {
  				source._status = 'resolved';
  
  				if (eventInputs) {
  					for (i = 0; i < eventInputs.length; i++) {
  						eventInput = eventInputs[i];
  
  						if (isArraySource) { // array sources have already been convert to Event Objects
  							abstractEvent = eventInput;
  						}
  						else {
  							abstractEvent = buildEventFromInput(eventInput, source);
  						}
  
  						if (abstractEvent) { // not false (an invalid event)
  							cache.push.apply(
  								cache,
  								expandEvent(abstractEvent) // add individual expanded events to the cache
  							);
  						}
  					}
  				}
  
  				decrementPendingSourceCnt();
  			}
  		});
  	}
  
  
  	function rejectEventSource(source) {
  		var wasPending = source._status === 'pending';
  
  		source._status = 'rejected';
  
  		if (wasPending) {
  			decrementPendingSourceCnt();
  		}
  	}
  
  
  	function decrementPendingSourceCnt() {
  		pendingSourceCnt--;
  		if (!pendingSourceCnt) {
  			reportEvents(cache);
  		}
  	}
  
  
  	function _fetchEventSource(source, callback) {
  		var i;
  		var fetchers = FC.sourceFetchers;
  		var res;
  
  		for (i=0; i<fetchers.length; i++) {
  			res = fetchers[i].call(
  				t, // this, the Calendar object
  				source,
  				rangeStart.clone(),
  				rangeEnd.clone(),
  				t.options.timezone,
  				callback
  			);
  
  			if (res === true) {
  				// the fetcher is in charge. made its own async request
  				return;
  			}
  			else if (typeof res == 'object') {
  				// the fetcher returned a new source. process it
  				_fetchEventSource(res, callback);
  				return;
  			}
  		}
  
  		var events = source.events;
  		if (events) {
  			if ($.isFunction(events)) {
  				t.pushLoading();
  				events.call(
  					t, // this, the Calendar object
  					rangeStart.clone(),
  					rangeEnd.clone(),
  					t.options.timezone,
  					function(events) {
  						callback(events);
  						t.popLoading();
  					}
  				);
  			}
  			else if ($.isArray(events)) {
  				callback(events);
  			}
  			else {
  				callback();
  			}
  		}else{
  			var url = source.url;
  			if (url) {
  				var success = source.success;
  				var error = source.error;
  				var complete = source.complete;
  
  				// retrieve any outbound GET/POST $.ajax data from the options
  				var customData;
  				if ($.isFunction(source.data)) {
  					// supplied as a function that returns a key/value object
  					customData = source.data();
  				}
  				else {
  					// supplied as a straight key/value object
  					customData = source.data;
  				}
  
  				// use a copy of the custom data so we can modify the parameters
  				// and not affect the passed-in object.
  				var data = $.extend({}, customData || {});
  
  				var startParam = firstDefined(source.startParam, t.options.startParam);
  				var endParam = firstDefined(source.endParam, t.options.endParam);
  				var timezoneParam = firstDefined(source.timezoneParam, t.options.timezoneParam);
  
  				if (startParam) {
  					data[startParam] = rangeStart.format();
  				}
  				if (endParam) {
  					data[endParam] = rangeEnd.format();
  				}
  				if (t.options.timezone && t.options.timezone != 'local') {
  					data[timezoneParam] = t.options.timezone;
  				}
  
  				t.pushLoading();
  				$.ajax($.extend({}, ajaxDefaults, source, {
  					data: data,
  					success: function(events) {
  						events = events || [];
  						var res = applyAll(success, this, arguments);
  						if ($.isArray(res)) {
  							events = res;
  						}
  						callback(events);
  					},
  					error: function() {
  						applyAll(error, this, arguments);
  						callback();
  					},
  					complete: function() {
  						applyAll(complete, this, arguments);
  						t.popLoading();
  					}
  				}));
  			}else{
  				callback();
  			}
  		}
  	}
  
  
  
  	/* Sources
  	-----------------------------------------------------------------------------*/
  
  
  	function addEventSource(sourceInput) {
  		var source = buildEventSource(sourceInput);
  		if (source) {
  			sources.push(source);
  			fetchEventSources([ source ], 'add'); // will eventually call reportEvents
  		}
  	}
  
  
  	function buildEventSource(sourceInput) { // will return undefined if invalid source
  		var normalizers = FC.sourceNormalizers;
  		var source;
  		var i;
  
  		if ($.isFunction(sourceInput) || $.isArray(sourceInput)) {
  			source = { events: sourceInput };
  		}
  		else if (typeof sourceInput === 'string') {
  			source = { url: sourceInput };
  		}
  		else if (typeof sourceInput === 'object') {
  			source = $.extend({}, sourceInput); // shallow copy
  		}
  
  		if (source) {
  
  			// TODO: repeat code, same code for event classNames
  			if (source.className) {
  				if (typeof source.className === 'string') {
  					source.className = source.className.split(/\s+/);
  				}
  				// otherwise, assumed to be an array
  			}
  			else {
  				source.className = [];
  			}
  
  			// for array sources, we convert to standard Event Objects up front
  			if ($.isArray(source.events)) {
  				source.origArray = source.events; // for removeEventSource
  				source.events = $.map(source.events, function(eventInput) {
  					return buildEventFromInput(eventInput, source);
  				});
  			}
  
  			for (i=0; i<normalizers.length; i++) {
  				normalizers[i].call(t, source);
  			}
  
  			return source;
  		}
  	}
  
  
  	function removeEventSource(matchInput) {
  		removeSpecificEventSources(
  			getEventSourcesByMatch(matchInput)
  		);
  	}
  
  
  	// if called with no arguments, removes all.
  	function removeEventSources(matchInputs) {
  		if (matchInputs == null) {
  			removeSpecificEventSources(sources, true); // isAll=true
  		}
  		else {
  			removeSpecificEventSources(
  				getEventSourcesByMatchArray(matchInputs)
  			);
  		}
  	}
  
  
  	function removeSpecificEventSources(targetSources, isAll) {
  		var i;
  
  		// cancel pending requests
  		for (i = 0; i < targetSources.length; i++) {
  			rejectEventSource(targetSources[i]);
  		}
  
  		if (isAll) { // an optimization
  			sources = [];
  			cache = [];
  		}
  		else {
  			// remove from persisted source list
  			sources = $.grep(sources, function(source) {
  				for (i = 0; i < targetSources.length; i++) {
  					if (source === targetSources[i]) {
  						return false; // exclude
  					}
  				}
  				return true; // include
  			});
  
  			cache = excludeEventsBySources(cache, targetSources);
  		}
  
  		reportEvents(cache);
  	}
  
  
  	function getEventSources() {
  		return sources.slice(1); // returns a shallow copy of sources with stickySource removed
  	}
  
  
  	function getEventSourceById(id) {
  		return $.grep(sources, function(source) {
  			return source.id && source.id === id;
  		})[0];
  	}
  
  
  	// like getEventSourcesByMatch, but accepts multple match criteria (like multiple IDs)
  	function getEventSourcesByMatchArray(matchInputs) {
  
  		// coerce into an array
  		if (!matchInputs) {
  			matchInputs = [];
  		}
  		else if (!$.isArray(matchInputs)) {
  			matchInputs = [ matchInputs ];
  		}
  
  		var matchingSources = [];
  		var i;
  
  		// resolve raw inputs to real event source objects
  		for (i = 0; i < matchInputs.length; i++) {
  			matchingSources.push.apply( // append
  				matchingSources,
  				getEventSourcesByMatch(matchInputs[i])
  			);
  		}
  
  		return matchingSources;
  	}
  
  
  	// matchInput can either by a real event source object, an ID, or the function/URL for the source.
  	// returns an array of matching source objects.
  	function getEventSourcesByMatch(matchInput) {
  		var i, source;
  
  		// given an proper event source object
  		for (i = 0; i < sources.length; i++) {
  			source = sources[i];
  			if (source === matchInput) {
  				return [ source ];
  			}
  		}
  
  		// an ID match
  		source = getEventSourceById(matchInput);
  		if (source) {
  			return [ source ];
  		}
  
  		return $.grep(sources, function(source) {
  			return isSourcesEquivalent(matchInput, source);
  		});
  	}
  
  
  	function isSourcesEquivalent(source1, source2) {
  		return source1 && source2 && getSourcePrimitive(source1) == getSourcePrimitive(source2);
  	}
  
  
  	function getSourcePrimitive(source) {
  		return (
  			(typeof source === 'object') ? // a normalized event source?
  				(source.origArray || source.googleCalendarId || source.url || source.events) : // get the primitive
  				null
  		) ||
  		source; // the given argument *is* the primitive
  	}
  
  
  	// util
  	// returns a filtered array without events that are part of any of the given sources
  	function excludeEventsBySources(specificEvents, specificSources) {
  		return $.grep(specificEvents, function(event) {
  			for (var i = 0; i < specificSources.length; i++) {
  				if (event.source === specificSources[i]) {
  					return false; // exclude
  				}
  			}
  			return true; // keep
  		});
  	}
  
  
  
  	/* Manipulation
  	-----------------------------------------------------------------------------*/
  
  
  	// Only ever called from the externally-facing API
  	function updateEvent(event) {
  
  		// massage start/end values, even if date string values
  		event.start = t.moment(event.start);
  		if (event.end) {
  			event.end = t.moment(event.end);
  		}
  		else {
  			event.end = null;
  		}
  
  		mutateEvent(event, getMiscEventProps(event)); // will handle start/end/allDay normalization
  		reportEvents(cache); // reports event modifications (so we can redraw)
  	}
  
  
  	// Returns a hash of misc event properties that should be copied over to related events.
  	function getMiscEventProps(event) {
  		var props = {};
  
  		$.each(event, function(name, val) {
  			if (isMiscEventPropName(name)) {
  				if (val !== undefined && isAtomic(val)) { // a defined non-object
  					props[name] = val;
  				}
  			}
  		});
  
  		return props;
  	}
  
  	// non-date-related, non-id-related, non-secret
  	function isMiscEventPropName(name) {
  		return !/^_|^(id|allDay|start|end)$/.test(name);
  	}
  
  
  	// returns the expanded events that were created
  	function renderEvent(eventInput, stick) {
  		var abstractEvent = buildEventFromInput(eventInput);
  		var events;
  		var i, event;
  
  		if (abstractEvent) { // not false (a valid input)
  			events = expandEvent(abstractEvent);
  
  			for (i = 0; i < events.length; i++) {
  				event = events[i];
  
  				if (!event.source) {
  					if (stick) {
  						stickySource.events.push(event);
  						event.source = stickySource;
  					}
  					cache.push(event);
  				}
  			}
  
  			reportEvents(cache);
  
  			return events;
  		}
  
  		return [];
  	}
  
  
  	function removeEvents(filter) {
  		var eventID;
  		var i;
  
  		if (filter == null) { // null or undefined. remove all events
  			filter = function() { return true; }; // will always match
  		}
  		else if (!$.isFunction(filter)) { // an event ID
  			eventID = filter + '';
  			filter = function(event) {
  				return event._id == eventID;
  			};
  		}
  
  		// Purge event(s) from our local cache
  		cache = $.grep(cache, filter, true); // inverse=true
  
  		// Remove events from array sources.
  		// This works because they have been converted to official Event Objects up front.
  		// (and as a result, event._id has been calculated).
  		for (i=0; i<sources.length; i++) {
  			if ($.isArray(sources[i].events)) {
  				sources[i].events = $.grep(sources[i].events, filter, true);
  			}
  		}
  
  		reportEvents(cache);
  	}
  
  
  	function clientEvents(filter) {
  		if ($.isFunction(filter)) {
  			return $.grep(cache, filter);
  		}
  		else if (filter != null) { // not null, not undefined. an event ID
  			filter += '';
  			return $.grep(cache, function(e) {
  				return e._id == filter;
  			});
  		}
  		return cache; // else, return all
  	}
  
  
  	// Makes sure all array event sources have their internal event objects
  	// converted over to the Calendar's current timezone.
  	t.rezoneArrayEventSources = function() {
  		var i;
  		var events;
  		var j;
  
  		for (i = 0; i < sources.length; i++) {
  			events = sources[i].events;
  			if ($.isArray(events)) {
  
  				for (j = 0; j < events.length; j++) {
  					rezoneEventDates(events[j]);
  				}
  			}
  		}
  	};
  
  	function rezoneEventDates(event) {
  		event.start = t.moment(event.start);
  		if (event.end) {
  			event.end = t.moment(event.end);
  		}
  		backupEventDates(event);
  	}
  
  
  	/* Event Normalization
  	-----------------------------------------------------------------------------*/
  
  
  	// Given a raw object with key/value properties, returns an "abstract" Event object.
  	// An "abstract" event is an event that, if recurring, will not have been expanded yet.
  	// Will return `false` when input is invalid.
  	// `source` is optional
  	function buildEventFromInput(input, source) {
  		var out = {};
  		var start, end;
  		var allDay;
  
  		if (t.options.eventDataTransform) {
  			input = t.options.eventDataTransform(input);
  		}
  		if (source && source.eventDataTransform) {
  			input = source.eventDataTransform(input);
  		}
  
  		// Copy all properties over to the resulting object.
  		// The special-case properties will be copied over afterwards.
  		$.extend(out, input);
  
  		if (source) {
  			out.source = source;
  		}
  
  		out._id = input._id || (input.id === undefined ? '_fc' + eventGUID++ : input.id + '');
  
  		if (input.className) {
  			if (typeof input.className == 'string') {
  				out.className = input.className.split(/\s+/);
  			}
  			else { // assumed to be an array
  				out.className = input.className;
  			}
  		}
  		else {
  			out.className = [];
  		}
  
  		start = input.start || input.date; // "date" is an alias for "start"
  		end = input.end;
  
  		// parse as a time (Duration) if applicable
  		if (isTimeString(start)) {
  			start = moment.duration(start);
  		}
  		if (isTimeString(end)) {
  			end = moment.duration(end);
  		}
  
  		if (input.dow || moment.isDuration(start) || moment.isDuration(end)) {
  
  			// the event is "abstract" (recurring) so don't calculate exact start/end dates just yet
  			out.start = start ? moment.duration(start) : null; // will be a Duration or null
  			out.end = end ? moment.duration(end) : null; // will be a Duration or null
  			out._recurring = true; // our internal marker
  		}
  		else {
  
  			if (start) {
  				start = t.moment(start);
  				if (!start.isValid()) {
  					return false;
  				}
  			}
  
  			if (end) {
  				end = t.moment(end);
  				if (!end.isValid()) {
  					end = null; // let defaults take over
  				}
  			}
  
  			allDay = input.allDay;
  			if (allDay === undefined) { // still undefined? fallback to default
  				allDay = firstDefined(
  					source ? source.allDayDefault : undefined,
  					t.options.allDayDefault
  				);
  				// still undefined? normalizeEventDates will calculate it
  			}
  
  			assignDatesToEvent(start, end, allDay, out);
  		}
  
  		t.normalizeEvent(out); // hook for external use. a prototype method
  
  		return out;
  	}
  	t.buildEventFromInput = buildEventFromInput;
  
  
  	// Normalizes and assigns the given dates to the given partially-formed event object.
  	// NOTE: mutates the given start/end moments. does not make a copy.
  	function assignDatesToEvent(start, end, allDay, event) {
  		event.start = start;
  		event.end = end;
  		event.allDay = allDay;
  		normalizeEventDates(event);
  		backupEventDates(event);
  	}
  
  
  	// Ensures proper values for allDay/start/end. Accepts an Event object, or a plain object with event-ish properties.
  	// NOTE: Will modify the given object.
  	function normalizeEventDates(eventProps) {
  
  		normalizeEventTimes(eventProps);
  
  		if (eventProps.end && !eventProps.end.isAfter(eventProps.start)) {
  			eventProps.end = null;
  		}
  
  		if (!eventProps.end) {
  			if (t.options.forceEventDuration) {
  				eventProps.end = t.getDefaultEventEnd(eventProps.allDay, eventProps.start);
  			}
  			else {
  				eventProps.end = null;
  			}
  		}
  	}
  
  
  	// Ensures the allDay property exists and the timeliness of the start/end dates are consistent
  	function normalizeEventTimes(eventProps) {
  		if (eventProps.allDay == null) {
  			eventProps.allDay = !(eventProps.start.hasTime() || (eventProps.end && eventProps.end.hasTime()));
  		}
  
  		if (eventProps.allDay) {
  			eventProps.start.stripTime();
  			if (eventProps.end) {
  				// TODO: consider nextDayThreshold here? If so, will require a lot of testing and adjustment
  				eventProps.end.stripTime();
  			}
  		}
  		else {
  			if (!eventProps.start.hasTime()) {
  				eventProps.start = t.applyTimezone(eventProps.start.time(0)); // will assign a 00:00 time
  			}
  			if (eventProps.end && !eventProps.end.hasTime()) {
  				eventProps.end = t.applyTimezone(eventProps.end.time(0)); // will assign a 00:00 time
  			}
  		}
  	}
  
  
  	// If the given event is a recurring event, break it down into an array of individual instances.
  	// If not a recurring event, return an array with the single original event.
  	// If given a falsy input (probably because of a failed buildEventFromInput call), returns an empty array.
  	// HACK: can override the recurring window by providing custom rangeStart/rangeEnd (for businessHours).
  	function expandEvent(abstractEvent, _rangeStart, _rangeEnd) {
  		var events = [];
  		var dowHash;
  		var dow;
  		var i;
  		var date;
  		var startTime, endTime;
  		var start, end;
  		var event;
  
  		_rangeStart = _rangeStart || rangeStart;
  		_rangeEnd = _rangeEnd || rangeEnd;
  
  		if (abstractEvent) {
  			if (abstractEvent._recurring) {
  
  				// make a boolean hash as to whether the event occurs on each day-of-week
  				if ((dow = abstractEvent.dow)) {
  					dowHash = {};
  					for (i = 0; i < dow.length; i++) {
  						dowHash[dow[i]] = true;
  					}
  				}
  
  				// iterate through every day in the current range
  				date = _rangeStart.clone().stripTime(); // holds the date of the current day
  				while (date.isBefore(_rangeEnd)) {
  
  					if (!dowHash || dowHash[date.day()]) { // if everyday, or this particular day-of-week
  
  						startTime = abstractEvent.start; // the stored start and end properties are times (Durations)
  						endTime = abstractEvent.end; // "
  						start = date.clone();
  						end = null;
  
  						if (startTime) {
  							start = start.time(startTime);
  						}
  						if (endTime) {
  							end = date.clone().time(endTime);
  						}
  
  						event = $.extend({}, abstractEvent); // make a copy of the original
  						assignDatesToEvent(
  							start, end,
  							!startTime && !endTime, // allDay?
  							event
  						);
  						events.push(event);
  					}
  
  					date.add(1, 'days');
  				}
  			}
  			else {
  				events.push(abstractEvent); // return the original event. will be a one-item array
  			}
  		}
  
  		return events;
  	}
  	t.expandEvent = expandEvent;
  
  
  
  	/* Event Modification Math
  	-----------------------------------------------------------------------------------------*/
  
  
  	// Modifies an event and all related events by applying the given properties.
  	// Special date-diffing logic is used for manipulation of dates.
  	// If `props` does not contain start/end dates, the updated values are assumed to be the event's current start/end.
  	// All date comparisons are done against the event's pristine _start and _end dates.
  	// Returns an object with delta information and a function to undo all operations.
  	// For making computations in a granularity greater than day/time, specify largeUnit.
  	// NOTE: The given `newProps` might be mutated for normalization purposes.
  	function mutateEvent(event, newProps, largeUnit) {
  		var miscProps = {};
  		var oldProps;
  		var clearEnd;
  		var startDelta;
  		var endDelta;
  		var durationDelta;
  		var undoFunc;
  
  		// diffs the dates in the appropriate way, returning a duration
  		function diffDates(date1, date0) { // date1 - date0
  			if (largeUnit) {
  				return diffByUnit(date1, date0, largeUnit);
  			}
  			else if (newProps.allDay) {
  				return diffDay(date1, date0);
  			}
  			else {
  				return diffDayTime(date1, date0);
  			}
  		}
  
  		newProps = newProps || {};
  
  		// normalize new date-related properties
  		if (!newProps.start) {
  			newProps.start = event.start.clone();
  		}
  		if (newProps.end === undefined) {
  			newProps.end = event.end ? event.end.clone() : null;
  		}
  		if (newProps.allDay == null) { // is null or undefined?
  			newProps.allDay = event.allDay;
  		}
  		normalizeEventDates(newProps);
  
  		// create normalized versions of the original props to compare against
  		// need a real end value, for diffing
  		oldProps = {
  			start: event._start.clone(),
  			end: event._end ? event._end.clone() : t.getDefaultEventEnd(event._allDay, event._start),
  			allDay: newProps.allDay // normalize the dates in the same regard as the new properties
  		};
  		normalizeEventDates(oldProps);
  
  		// need to clear the end date if explicitly changed to null
  		clearEnd = event._end !== null && newProps.end === null;
  
  		// compute the delta for moving the start date
  		startDelta = diffDates(newProps.start, oldProps.start);
  
  		// compute the delta for moving the end date
  		if (newProps.end) {
  			endDelta = diffDates(newProps.end, oldProps.end);
  			durationDelta = endDelta.subtract(startDelta);
  		}
  		else {
  			durationDelta = null;
  		}
  
  		// gather all non-date-related properties
  		$.each(newProps, function(name, val) {
  			if (isMiscEventPropName(name)) {
  				if (val !== undefined) {
  					miscProps[name] = val;
  				}
  			}
  		});
  
  		// apply the operations to the event and all related events
  		undoFunc = mutateEvents(
  			clientEvents(event._id), // get events with this ID
  			clearEnd,
  			newProps.allDay,
  			startDelta,
  			durationDelta,
  			miscProps
  		);
  
  		return {
  			dateDelta: startDelta,
  			durationDelta: durationDelta,
  			undo: undoFunc
  		};
  	}
  
  
  	// Modifies an array of events in the following ways (operations are in order):
  	// - clear the event's `end`
  	// - convert the event to allDay
  	// - add `dateDelta` to the start and end
  	// - add `durationDelta` to the event's duration
  	// - assign `miscProps` to the event
  	//
  	// Returns a function that can be called to undo all the operations.
  	//
  	// TODO: don't use so many closures. possible memory issues when lots of events with same ID.
  	//
  	function mutateEvents(events, clearEnd, allDay, dateDelta, durationDelta, miscProps) {
  		var isAmbigTimezone = t.getIsAmbigTimezone();
  		var undoFunctions = [];
  
  		// normalize zero-length deltas to be null
  		if (dateDelta && !dateDelta.valueOf()) { dateDelta = null; }
  		if (durationDelta && !durationDelta.valueOf()) { durationDelta = null; }
  
  		$.each(events, function(i, event) {
  			var oldProps;
  			var newProps;
  
  			// build an object holding all the old values, both date-related and misc.
  			// for the undo function.
  			oldProps = {
  				start: event.start.clone(),
  				end: event.end ? event.end.clone() : null,
  				allDay: event.allDay
  			};
  			$.each(miscProps, function(name) {
  				oldProps[name] = event[name];
  			});
  
  			// new date-related properties. work off the original date snapshot.
  			// ok to use references because they will be thrown away when backupEventDates is called.
  			newProps = {
  				start: event._start,
  				end: event._end,
  				allDay: allDay // normalize the dates in the same regard as the new properties
  			};
  			normalizeEventDates(newProps); // massages start/end/allDay
  
  			// strip or ensure the end date
  			if (clearEnd) {
  				newProps.end = null;
  			}
  			else if (durationDelta && !newProps.end) { // the duration translation requires an end date
  				newProps.end = t.getDefaultEventEnd(newProps.allDay, newProps.start);
  			}
  
  			if (dateDelta) {
  				newProps.start.add(dateDelta);
  				if (newProps.end) {
  					newProps.end.add(dateDelta);
  				}
  			}
  
  			if (durationDelta) {
  				newProps.end.add(durationDelta); // end already ensured above
  			}
  
  			// if the dates have changed, and we know it is impossible to recompute the
  			// timezone offsets, strip the zone.
  			if (
  				isAmbigTimezone &&
  				!newProps.allDay &&
  				(dateDelta || durationDelta)
  			) {
  				newProps.start.stripZone();
  				if (newProps.end) {
  					newProps.end.stripZone();
  				}
  			}
  
  			$.extend(event, miscProps, newProps); // copy over misc props, then date-related props
  			backupEventDates(event); // regenerate internal _start/_end/_allDay
  
  			undoFunctions.push(function() {
  				$.extend(event, oldProps);
  				backupEventDates(event); // regenerate internal _start/_end/_allDay
  			});
  		});
  
  		return function() {
  			for (var i = 0; i < undoFunctions.length; i++) {
  				undoFunctions[i]();
  			}
  		};
  	}
  
  
  	t.getEventCache = function() {
  		return cache;
  	};
  
  }
  
  
  // hook for external libs to manipulate event properties upon creation.
  // should manipulate the event in-place.
  Calendar.prototype.normalizeEvent = function(event) {
  };
  
  
  // Does the given span (start, end, and other location information)
  // fully contain the other?
  Calendar.prototype.spanContainsSpan = function(outerSpan, innerSpan) {
  	var eventStart = outerSpan.start.clone().stripZone();
  	var eventEnd = this.getEventEnd(outerSpan).stripZone();
  
  	return innerSpan.start >= eventStart && innerSpan.end <= eventEnd;
  };
  
  
  // Returns a list of events that the given event should be compared against when being considered for a move to
  // the specified span. Attached to the Calendar's prototype because EventManager is a mixin for a Calendar.
  Calendar.prototype.getPeerEvents = function(span, event) {
  	var cache = this.getEventCache();
  	var peerEvents = [];
  	var i, otherEvent;
  
  	for (i = 0; i < cache.length; i++) {
  		otherEvent = cache[i];
  		if (
  			!event ||
  			event._id !== otherEvent._id // don't compare the event to itself or other related [repeating] events
  		) {
  			peerEvents.push(otherEvent);
  		}
  	}
  
  	return peerEvents;
  };
  
  
  // updates the "backup" properties, which are preserved in order to compute diffs later on.
  function backupEventDates(event) {
  	event._allDay = event.allDay;
  	event._start = event.start.clone();
  	event._end = event.end ? event.end.clone() : null;
  }
  
  
  /* Overlapping / Constraining
  -----------------------------------------------------------------------------------------*/
  
  
  // Determines if the given event can be relocated to the given span (unzoned start/end with other misc data)
  Calendar.prototype.isEventSpanAllowed = function(span, event) {
  	var source = event.source || {};
  
  	var constraint = firstDefined(
  		event.constraint,
  		source.constraint,
  		this.options.eventConstraint
  	);
  
  	var overlap = firstDefined(
  		event.overlap,
  		source.overlap,
  		this.options.eventOverlap
  	);
  
  	return this.isSpanAllowed(span, constraint, overlap, event) &&
  		(!this.options.eventAllow || this.options.eventAllow(span, event) !== false);
  };
  
  
  // Determines if an external event can be relocated to the given span (unzoned start/end with other misc data)
  Calendar.prototype.isExternalSpanAllowed = function(eventSpan, eventLocation, eventProps) {
  	var eventInput;
  	var event;
  
  	// note: very similar logic is in View's reportExternalDrop
  	if (eventProps) {
  		eventInput = $.extend({}, eventProps, eventLocation);
  		event = this.expandEvent(
  			this.buildEventFromInput(eventInput)
  		)[0];
  	}
  
  	if (event) {
  		return this.isEventSpanAllowed(eventSpan, event);
  	}
  	else { // treat it as a selection
  
  		return this.isSelectionSpanAllowed(eventSpan);
  	}
  };
  
  
  // Determines the given span (unzoned start/end with other misc data) can be selected.
  Calendar.prototype.isSelectionSpanAllowed = function(span) {
  	return this.isSpanAllowed(span, this.options.selectConstraint, this.options.selectOverlap) &&
  		(!this.options.selectAllow || this.options.selectAllow(span) !== false);
  };
  
  
  // Returns true if the given span (caused by an event drop/resize or a selection) is allowed to exist
  // according to the constraint/overlap settings.
  // `event` is not required if checking a selection.
  Calendar.prototype.isSpanAllowed = function(span, constraint, overlap, event) {
  	var constraintEvents;
  	var anyContainment;
  	var peerEvents;
  	var i, peerEvent;
  	var peerOverlap;
  
  	// the range must be fully contained by at least one of produced constraint events
  	if (constraint != null) {
  
  		// not treated as an event! intermediate data structure
  		// TODO: use ranges in the future
  		constraintEvents = this.constraintToEvents(constraint);
  		if (constraintEvents) { // not invalid
  
  			anyContainment = false;
  			for (i = 0; i < constraintEvents.length; i++) {
  				if (this.spanContainsSpan(constraintEvents[i], span)) {
  					anyContainment = true;
  					break;
  				}
  			}
  
  			if (!anyContainment) {
  				return false;
  			}
  		}
  	}
  
  	peerEvents = this.getPeerEvents(span, event);
  
  	for (i = 0; i < peerEvents.length; i++)  {
  		peerEvent = peerEvents[i];
  
  		// there needs to be an actual intersection before disallowing anything
  		if (this.eventIntersectsRange(peerEvent, span)) {
  
  			// evaluate overlap for the given range and short-circuit if necessary
  			if (overlap === false) {
  				return false;
  			}
  			// if the event's overlap is a test function, pass the peer event in question as the first param
  			else if (typeof overlap === 'function' && !overlap(peerEvent, event)) {
  				return false;
  			}
  
  			// if we are computing if the given range is allowable for an event, consider the other event's
  			// EventObject-specific or Source-specific `overlap` property
  			if (event) {
  				peerOverlap = firstDefined(
  					peerEvent.overlap,
  					(peerEvent.source || {}).overlap
  					// we already considered the global `eventOverlap`
  				);
  				if (peerOverlap === false) {
  					return false;
  				}
  				// if the peer event's overlap is a test function, pass the subject event as the first param
  				if (typeof peerOverlap === 'function' && !peerOverlap(event, peerEvent)) {
  					return false;
  				}
  			}
  		}
  	}
  
  	return true;
  };
  
  
  // Given an event input from the API, produces an array of event objects. Possible event inputs:
  // 'businessHours'
  // An event ID (number or string)
  // An object with specific start/end dates or a recurring event (like what businessHours accepts)
  Calendar.prototype.constraintToEvents = function(constraintInput) {
  
  	if (constraintInput === 'businessHours') {
  		return this.getCurrentBusinessHourEvents();
  	}
  
  	if (typeof constraintInput === 'object') {
  		if (constraintInput.start != null) { // needs to be event-like input
  			return this.expandEvent(this.buildEventFromInput(constraintInput));
  		}
  		else {
  			return null; // invalid
  		}
  	}
  
  	return this.clientEvents(constraintInput); // probably an ID
  };
  
  
  // Does the event's date range intersect with the given range?
  // start/end already assumed to have stripped zones :(
  Calendar.prototype.eventIntersectsRange = function(event, range) {
  	var eventStart = event.start.clone().stripZone();
  	var eventEnd = this.getEventEnd(event).stripZone();
  
  	return range.start < eventEnd && range.end > eventStart;
  };
  
  
  /* Business Hours
  -----------------------------------------------------------------------------------------*/
  
  var BUSINESS_HOUR_EVENT_DEFAULTS = {
  	id: '_fcBusinessHours', // will relate events from different calls to expandEvent
  	start: '09:00',
  	end: '17:00',
  	dow: [ 1, 2, 3, 4, 5 ], // monday - friday
  	rendering: 'inverse-background'
  	// classNames are defined in businessHoursSegClasses
  };
  
  // Return events objects for business hours within the current view.
  // Abuse of our event system :(
  Calendar.prototype.getCurrentBusinessHourEvents = function(wholeDay) {
  	return this.computeBusinessHourEvents(wholeDay, this.options.businessHours);
  };
  
  // Given a raw input value from options, return events objects for business hours within the current view.
  Calendar.prototype.computeBusinessHourEvents = function(wholeDay, input) {
  	if (input === true) {
  		return this.expandBusinessHourEvents(wholeDay, [ {} ]);
  	}
  	else if ($.isPlainObject(input)) {
  		return this.expandBusinessHourEvents(wholeDay, [ input ]);
  	}
  	else if ($.isArray(input)) {
  		return this.expandBusinessHourEvents(wholeDay, input, true);
  	}
  	else {
  		return [];
  	}
  };
  
  // inputs expected to be an array of objects.
  // if ignoreNoDow is true, will ignore entries that don't specify a day-of-week (dow) key.
  Calendar.prototype.expandBusinessHourEvents = function(wholeDay, inputs, ignoreNoDow) {
  	var view = this.getView();
  	var events = [];
  	var i, input;
  
  	for (i = 0; i < inputs.length; i++) {
  		input = inputs[i];
  
  		if (ignoreNoDow && !input.dow) {
  			continue;
  		}
  
  		// give defaults. will make a copy
  		input = $.extend({}, BUSINESS_HOUR_EVENT_DEFAULTS, input);
  
  		// if a whole-day series is requested, clear the start/end times
  		if (wholeDay) {
  			input.start = null;
  			input.end = null;
  		}
  
  		events.push.apply(events, // append
  			this.expandEvent(
  				this.buildEventFromInput(input),
  				view.start,
  				view.end
  			)
  		);
  	}
  
  	return events;
  };
  
  ;;
  
  /* An abstract class for the "basic" views, as well as month view. Renders one or more rows of day cells.
  ----------------------------------------------------------------------------------------------------------------------*/
  // It is a manager for a DayGrid subcomponent, which does most of the heavy lifting.
  // It is responsible for managing width/height.
  
  var BasicView = FC.BasicView = View.extend({
  
  	scroller: null,
  
  	dayGridClass: DayGrid, // class the dayGrid will be instantiated from (overridable by subclasses)
  	dayGrid: null, // the main subcomponent that does most of the heavy lifting
  
  	dayNumbersVisible: false, // display day numbers on each day cell?
  	colWeekNumbersVisible: false, // display week numbers along the side?
  	cellWeekNumbersVisible: false, // display week numbers in day cell?
  
  	weekNumberWidth: null, // width of all the week-number cells running down the side
  
  	headContainerEl: null, // div that hold's the dayGrid's rendered date header
  	headRowEl: null, // the fake row element of the day-of-week header
  
  
  	initialize: function() {
  		this.dayGrid = this.instantiateDayGrid();
  
  		this.scroller = new Scroller({
  			overflowX: 'hidden',
  			overflowY: 'auto'
  		});
  	},
  
  
  	// Generates the DayGrid object this view needs. Draws from this.dayGridClass
  	instantiateDayGrid: function() {
  		// generate a subclass on the fly with BasicView-specific behavior
  		// TODO: cache this subclass
  		var subclass = this.dayGridClass.extend(basicDayGridMethods);
  
  		return new subclass(this);
  	},
  
  
  	// Sets the display range and computes all necessary dates
  	setRange: function(range) {
  		View.prototype.setRange.call(this, range); // call the super-method
  
  		this.dayGrid.breakOnWeeks = /year|month|week/.test(this.intervalUnit); // do before setRange
  		this.dayGrid.setRange(range);
  	},
  
  
  	// Compute the value to feed into setRange. Overrides superclass.
  	computeRange: function(date) {
  		var range = View.prototype.computeRange.call(this, date); // get value from the super-method
  
  		// year and month views should be aligned with weeks. this is already done for week
  		if (/year|month/.test(range.intervalUnit)) {
  			range.start.startOf('week');
  			range.start = this.skipHiddenDays(range.start);
  
  			// make end-of-week if not already
  			if (range.end.weekday()) {
  				range.end.add(1, 'week').startOf('week');
  				range.end = this.skipHiddenDays(range.end, -1, true); // exclusively move backwards
  			}
  		}
  
  		return range;
  	},
  
  
  	// Renders the view into `this.el`, which should already be assigned
  	renderDates: function() {
  
  		this.dayNumbersVisible = this.dayGrid.rowCnt > 1; // TODO: make grid responsible
  		if (this.opt('weekNumbers')) {
  			if (this.opt('weekNumbersWithinDays')) {
  				this.cellWeekNumbersVisible = true;
  				this.colWeekNumbersVisible = false;
  			}
  			else {
  				this.cellWeekNumbersVisible = false;
  				this.colWeekNumbersVisible = true;
  			};
  		}
  		this.dayGrid.numbersVisible = this.dayNumbersVisible ||
  			this.cellWeekNumbersVisible || this.colWeekNumbersVisible;
  
  		this.el.addClass('fc-basic-view').html(this.renderSkeletonHtml());
  		this.renderHead();
  
  		this.scroller.render();
  		var dayGridContainerEl = this.scroller.el.addClass('fc-day-grid-container');
  		var dayGridEl = $('<div class="fc-day-grid" />').appendTo(dayGridContainerEl);
  		this.el.find('.fc-body > tr > td').append(dayGridContainerEl);
  
  		this.dayGrid.setElement(dayGridEl);
  		this.dayGrid.renderDates(this.hasRigidRows());
  	},
  
  
  	// render the day-of-week headers
  	renderHead: function() {
  		this.headContainerEl =
  			this.el.find('.fc-head-container')
  				.html(this.dayGrid.renderHeadHtml());
  		this.headRowEl = this.headContainerEl.find('.fc-row');
  	},
  
  
  	// Unrenders the content of the view. Since we haven't separated skeleton rendering from date rendering,
  	// always completely kill the dayGrid's rendering.
  	unrenderDates: function() {
  		this.dayGrid.unrenderDates();
  		this.dayGrid.removeElement();
  		this.scroller.destroy();
  	},
  
  
  	renderBusinessHours: function() {
  		this.dayGrid.renderBusinessHours();
  	},
  
  
  	unrenderBusinessHours: function() {
  		this.dayGrid.unrenderBusinessHours();
  	},
  
  
  	// Builds the HTML skeleton for the view.
  	// The day-grid component will render inside of a container defined by this HTML.
  	renderSkeletonHtml: function() {
  		return '' +
  			'<table>' +
  				'<thead class="fc-head">' +
  					'<tr>' +
  						'<td class="fc-head-container ' + this.widgetHeaderClass + '"></td>' +
  					'</tr>' +
  				'</thead>' +
  				'<tbody class="fc-body">' +
  					'<tr>' +
  						'<td class="' + this.widgetContentClass + '"></td>' +
  					'</tr>' +
  				'</tbody>' +
  			'</table>';
  	},
  
  
  	// Generates an HTML attribute string for setting the width of the week number column, if it is known
  	weekNumberStyleAttr: function() {
  		if (this.weekNumberWidth !== null) {
  			return 'style="width:' + this.weekNumberWidth + 'px"';
  		}
  		return '';
  	},
  
  
  	// Determines whether each row should have a constant height
  	hasRigidRows: function() {
  		var eventLimit = this.opt('eventLimit');
  		return eventLimit && typeof eventLimit !== 'number';
  	},
  
  
  	/* Dimensions
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Refreshes the horizontal dimensions of the view
  	updateWidth: function() {
  		if (this.colWeekNumbersVisible) {
  			// Make sure all week number cells running down the side have the same width.
  			// Record the width for cells created later.
  			this.weekNumberWidth = matchCellWidths(
  				this.el.find('.fc-week-number')
  			);
  		}
  	},
  
  
  	// Adjusts the vertical dimensions of the view to the specified values
  	setHeight: function(totalHeight, isAuto) {
  		var eventLimit = this.opt('eventLimit');
  		var scrollerHeight;
  		var scrollbarWidths;
  
  		// reset all heights to be natural
  		this.scroller.clear();
  		uncompensateScroll(this.headRowEl);
  
  		this.dayGrid.removeSegPopover(); // kill the "more" popover if displayed
  
  		// is the event limit a constant level number?
  		if (eventLimit && typeof eventLimit === 'number') {
  			this.dayGrid.limitRows(eventLimit); // limit the levels first so the height can redistribute after
  		}
  
  		// distribute the height to the rows
  		// (totalHeight is a "recommended" value if isAuto)
  		scrollerHeight = this.computeScrollerHeight(totalHeight);
  		this.setGridHeight(scrollerHeight, isAuto);
  
  		// is the event limit dynamically calculated?
  		if (eventLimit && typeof eventLimit !== 'number') {
  			this.dayGrid.limitRows(eventLimit); // limit the levels after the grid's row heights have been set
  		}
  
  		if (!isAuto) { // should we force dimensions of the scroll container?
  
  			this.scroller.setHeight(scrollerHeight);
  			scrollbarWidths = this.scroller.getScrollbarWidths();
  
  			if (scrollbarWidths.left || scrollbarWidths.right) { // using scrollbars?
  
  				compensateScroll(this.headRowEl, scrollbarWidths);
  
  				// doing the scrollbar compensation might have created text overflow which created more height. redo
  				scrollerHeight = this.computeScrollerHeight(totalHeight);
  				this.scroller.setHeight(scrollerHeight);
  			}
  
  			// guarantees the same scrollbar widths
  			this.scroller.lockOverflow(scrollbarWidths);
  		}
  	},
  
  
  	// given a desired total height of the view, returns what the height of the scroller should be
  	computeScrollerHeight: function(totalHeight) {
  		return totalHeight -
  			subtractInnerElHeight(this.el, this.scroller.el); // everything that's NOT the scroller
  	},
  
  
  	// Sets the height of just the DayGrid component in this view
  	setGridHeight: function(height, isAuto) {
  		if (isAuto) {
  			undistributeHeight(this.dayGrid.rowEls); // let the rows be their natural height with no expanding
  		}
  		else {
  			distributeHeight(this.dayGrid.rowEls, height, true); // true = compensate for height-hogging rows
  		}
  	},
  
  
  	/* Scroll
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	queryScroll: function() {
  		return this.scroller.getScrollTop();
  	},
  
  
  	setScroll: function(top) {
  		this.scroller.setScrollTop(top);
  	},
  
  
  	/* Hit Areas
  	------------------------------------------------------------------------------------------------------------------*/
  	// forward all hit-related method calls to dayGrid
  
  
  	prepareHits: function() {
  		this.dayGrid.prepareHits();
  	},
  
  
  	releaseHits: function() {
  		this.dayGrid.releaseHits();
  	},
  
  
  	queryHit: function(left, top) {
  		return this.dayGrid.queryHit(left, top);
  	},
  
  
  	getHitSpan: function(hit) {
  		return this.dayGrid.getHitSpan(hit);
  	},
  
  
  	getHitEl: function(hit) {
  		return this.dayGrid.getHitEl(hit);
  	},
  
  
  	/* Events
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders the given events onto the view and populates the segments array
  	renderEvents: function(events) {
  		this.dayGrid.renderEvents(events);
  
  		this.updateHeight(); // must compensate for events that overflow the row
  	},
  
  
  	// Retrieves all segment objects that are rendered in the view
  	getEventSegs: function() {
  		return this.dayGrid.getEventSegs();
  	},
  
  
  	// Unrenders all event elements and clears internal segment data
  	unrenderEvents: function() {
  		this.dayGrid.unrenderEvents();
  
  		// we DON'T need to call updateHeight() because
  		// a renderEvents() call always happens after this, which will eventually call updateHeight()
  	},
  
  
  	/* Dragging (for both events and external elements)
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// A returned value of `true` signals that a mock "helper" event has been rendered.
  	renderDrag: function(dropLocation, seg) {
  		return this.dayGrid.renderDrag(dropLocation, seg);
  	},
  
  
  	unrenderDrag: function() {
  		this.dayGrid.unrenderDrag();
  	},
  
  
  	/* Selection
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders a visual indication of a selection
  	renderSelection: function(span) {
  		this.dayGrid.renderSelection(span);
  	},
  
  
  	// Unrenders a visual indications of a selection
  	unrenderSelection: function() {
  		this.dayGrid.unrenderSelection();
  	}
  
  });
  
  
  // Methods that will customize the rendering behavior of the BasicView's dayGrid
  var basicDayGridMethods = {
  
  
  	// Generates the HTML that will go before the day-of week header cells
  	renderHeadIntroHtml: function() {
  		var view = this.view;
  
  		if (view.colWeekNumbersVisible) {
  			return '' +
  				'<th class="fc-week-number ' + view.widgetHeaderClass + '" ' + view.weekNumberStyleAttr() + '>' +
  					'<span>' + // needed for matchCellWidths
  						htmlEscape(view.opt('weekNumberTitle')) +
  					'</span>' +
  				'</th>';
  		}
  
  		return '';
  	},
  
  
  	// Generates the HTML that will go before content-skeleton cells that display the day/week numbers
  	renderNumberIntroHtml: function(row) {
  		var view = this.view;
  		var weekStart = this.getCellDate(row, 0);
  
  		if (view.colWeekNumbersVisible) {
  			return '' +
  				'<td class="fc-week-number" ' + view.weekNumberStyleAttr() + '>' +
  					view.buildGotoAnchorHtml( // aside from link, important for matchCellWidths
  						{ date: weekStart, type: 'week', forceOff: this.colCnt === 1 },
  						weekStart.format('w') // inner HTML
  					) +
  				'</td>';
  		}
  
  		return '';
  	},
  
  
  	// Generates the HTML that goes before the day bg cells for each day-row
  	renderBgIntroHtml: function() {
  		var view = this.view;
  
  		if (view.colWeekNumbersVisible) {
  			return '<td class="fc-week-number ' + view.widgetContentClass + '" ' +
  				view.weekNumberStyleAttr() + '></td>';
  		}
  
  		return '';
  	},
  
  
  	// Generates the HTML that goes before every other type of row generated by DayGrid.
  	// Affects helper-skeleton and highlight-skeleton rows.
  	renderIntroHtml: function() {
  		var view = this.view;
  
  		if (view.colWeekNumbersVisible) {
  			return '<td class="fc-week-number" ' + view.weekNumberStyleAttr() + '></td>';
  		}
  
  		return '';
  	}
  
  };
  
  ;;
  
  /* A month view with day cells running in rows (one-per-week) and columns
  ----------------------------------------------------------------------------------------------------------------------*/
  
  var MonthView = FC.MonthView = BasicView.extend({
  
  	// Produces information about what range to display
  	computeRange: function(date) {
  		var range = BasicView.prototype.computeRange.call(this, date); // get value from super-method
  		var rowCnt;
  
  		// ensure 6 weeks
  		if (this.isFixedWeeks()) {
  			rowCnt = Math.ceil(range.end.diff(range.start, 'weeks', true)); // could be partial weeks due to hiddenDays
  			range.end.add(6 - rowCnt, 'weeks');
  		}
  
  		return range;
  	},
  
  
  	// Overrides the default BasicView behavior to have special multi-week auto-height logic
  	setGridHeight: function(height, isAuto) {
  
  		// if auto, make the height of each row the height that it would be if there were 6 weeks
  		if (isAuto) {
  			height *= this.rowCnt / 6;
  		}
  
  		distributeHeight(this.dayGrid.rowEls, height, !isAuto); // if auto, don't compensate for height-hogging rows
  	},
  
  
  	isFixedWeeks: function() {
  		return this.opt('fixedWeekCount');
  	}
  
  });
  
  ;;
  
  fcViews.basic = {
  	'class': BasicView
  };
  
  fcViews.basicDay = {
  	type: 'basic',
  	duration: { days: 1 }
  };
  
  fcViews.basicWeek = {
  	type: 'basic',
  	duration: { weeks: 1 }
  };
  
  fcViews.month = {
  	'class': MonthView,
  	duration: { months: 1 }, // important for prev/next
  	defaults: {
  		fixedWeekCount: true
  	}
  };
  ;;
  
  /* An abstract class for all agenda-related views. Displays one more columns with time slots running vertically.
  ----------------------------------------------------------------------------------------------------------------------*/
  // Is a manager for the TimeGrid subcomponent and possibly the DayGrid subcomponent (if allDaySlot is on).
  // Responsible for managing width/height.
  
  var AgendaView = FC.AgendaView = View.extend({
  
  	scroller: null,
  
  	timeGridClass: TimeGrid, // class used to instantiate the timeGrid. subclasses can override
  	timeGrid: null, // the main time-grid subcomponent of this view
  
  	dayGridClass: DayGrid, // class used to instantiate the dayGrid. subclasses can override
  	dayGrid: null, // the "all-day" subcomponent. if all-day is turned off, this will be null
  
  	axisWidth: null, // the width of the time axis running down the side
  
  	headContainerEl: null, // div that hold's the timeGrid's rendered date header
  	noScrollRowEls: null, // set of fake row elements that must compensate when scroller has scrollbars
  
  	// when the time-grid isn't tall enough to occupy the given height, we render an <hr> underneath
  	bottomRuleEl: null,
  
  
  	initialize: function() {
  		this.timeGrid = this.instantiateTimeGrid();
  
  		if (this.opt('allDaySlot')) { // should we display the "all-day" area?
  			this.dayGrid = this.instantiateDayGrid(); // the all-day subcomponent of this view
  		}
  
  		this.scroller = new Scroller({
  			overflowX: 'hidden',
  			overflowY: 'auto'
  		});
  	},
  
  
  	// Instantiates the TimeGrid object this view needs. Draws from this.timeGridClass
  	instantiateTimeGrid: function() {
  		var subclass = this.timeGridClass.extend(agendaTimeGridMethods);
  
  		return new subclass(this);
  	},
  
  
  	// Instantiates the DayGrid object this view might need. Draws from this.dayGridClass
  	instantiateDayGrid: function() {
  		var subclass = this.dayGridClass.extend(agendaDayGridMethods);
  
  		return new subclass(this);
  	},
  
  
  	/* Rendering
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Sets the display range and computes all necessary dates
  	setRange: function(range) {
  		View.prototype.setRange.call(this, range); // call the super-method
  
  		this.timeGrid.setRange(range);
  		if (this.dayGrid) {
  			this.dayGrid.setRange(range);
  		}
  	},
  
  
  	// Renders the view into `this.el`, which has already been assigned
  	renderDates: function() {
  
  		this.el.addClass('fc-agenda-view').html(this.renderSkeletonHtml());
  		this.renderHead();
  
  		this.scroller.render();
  		var timeGridWrapEl = this.scroller.el.addClass('fc-time-grid-container');
  		var timeGridEl = $('<div class="fc-time-grid" />').appendTo(timeGridWrapEl);
  		this.el.find('.fc-body > tr > td').append(timeGridWrapEl);
  
  		this.timeGrid.setElement(timeGridEl);
  		this.timeGrid.renderDates();
  
  		// the <hr> that sometimes displays under the time-grid
  		this.bottomRuleEl = $('<hr class="fc-divider ' + this.widgetHeaderClass + '"/>')
  			.appendTo(this.timeGrid.el); // inject it into the time-grid
  
  		if (this.dayGrid) {
  			this.dayGrid.setElement(this.el.find('.fc-day-grid'));
  			this.dayGrid.renderDates();
  
  			// have the day-grid extend it's coordinate area over the <hr> dividing the two grids
  			this.dayGrid.bottomCoordPadding = this.dayGrid.el.next('hr').outerHeight();
  		}
  
  		this.noScrollRowEls = this.el.find('.fc-row:not(.fc-scroller *)'); // fake rows not within the scroller
  	},
  
  
  	// render the day-of-week headers
  	renderHead: function() {
  		this.headContainerEl =
  			this.el.find('.fc-head-container')
  				.html(this.timeGrid.renderHeadHtml());
  	},
  
  
  	// Unrenders the content of the view. Since we haven't separated skeleton rendering from date rendering,
  	// always completely kill each grid's rendering.
  	unrenderDates: function() {
  		this.timeGrid.unrenderDates();
  		this.timeGrid.removeElement();
  
  		if (this.dayGrid) {
  			this.dayGrid.unrenderDates();
  			this.dayGrid.removeElement();
  		}
  
  		this.scroller.destroy();
  	},
  
  
  	// Builds the HTML skeleton for the view.
  	// The day-grid and time-grid components will render inside containers defined by this HTML.
  	renderSkeletonHtml: function() {
  		return '' +
  			'<table>' +
  				'<thead class="fc-head">' +
  					'<tr>' +
  						'<td class="fc-head-container ' + this.widgetHeaderClass + '"></td>' +
  					'</tr>' +
  				'</thead>' +
  				'<tbody class="fc-body">' +
  					'<tr>' +
  						'<td class="' + this.widgetContentClass + '">' +
  							(this.dayGrid ?
  								'<div class="fc-day-grid"/>' +
  								'<hr class="fc-divider ' + this.widgetHeaderClass + '"/>' :
  								''
  								) +
  						'</td>' +
  					'</tr>' +
  				'</tbody>' +
  			'</table>';
  	},
  
  
  	// Generates an HTML attribute string for setting the width of the axis, if it is known
  	axisStyleAttr: function() {
  		if (this.axisWidth !== null) {
  			 return 'style="width:' + this.axisWidth + 'px"';
  		}
  		return '';
  	},
  
  
  	/* Business Hours
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	renderBusinessHours: function() {
  		this.timeGrid.renderBusinessHours();
  
  		if (this.dayGrid) {
  			this.dayGrid.renderBusinessHours();
  		}
  	},
  
  
  	unrenderBusinessHours: function() {
  		this.timeGrid.unrenderBusinessHours();
  
  		if (this.dayGrid) {
  			this.dayGrid.unrenderBusinessHours();
  		}
  	},
  
  
  	/* Now Indicator
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	getNowIndicatorUnit: function() {
  		return this.timeGrid.getNowIndicatorUnit();
  	},
  
  
  	renderNowIndicator: function(date) {
  		this.timeGrid.renderNowIndicator(date);
  	},
  
  
  	unrenderNowIndicator: function() {
  		this.timeGrid.unrenderNowIndicator();
  	},
  
  
  	/* Dimensions
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	updateSize: function(isResize) {
  		this.timeGrid.updateSize(isResize);
  
  		View.prototype.updateSize.call(this, isResize); // call the super-method
  	},
  
  
  	// Refreshes the horizontal dimensions of the view
  	updateWidth: function() {
  		// make all axis cells line up, and record the width so newly created axis cells will have it
  		this.axisWidth = matchCellWidths(this.el.find('.fc-axis'));
  	},
  
  
  	// Adjusts the vertical dimensions of the view to the specified values
  	setHeight: function(totalHeight, isAuto) {
  		var eventLimit;
  		var scrollerHeight;
  		var scrollbarWidths;
  
  		// reset all dimensions back to the original state
  		this.bottomRuleEl.hide(); // .show() will be called later if this <hr> is necessary
  		this.scroller.clear(); // sets height to 'auto' and clears overflow
  		uncompensateScroll(this.noScrollRowEls);
  
  		// limit number of events in the all-day area
  		if (this.dayGrid) {
  			this.dayGrid.removeSegPopover(); // kill the "more" popover if displayed
  
  			eventLimit = this.opt('eventLimit');
  			if (eventLimit && typeof eventLimit !== 'number') {
  				eventLimit = AGENDA_ALL_DAY_EVENT_LIMIT; // make sure "auto" goes to a real number
  			}
  			if (eventLimit) {
  				this.dayGrid.limitRows(eventLimit);
  			}
  		}
  
  		if (!isAuto) { // should we force dimensions of the scroll container?
  
  			scrollerHeight = this.computeScrollerHeight(totalHeight);
  			this.scroller.setHeight(scrollerHeight);
  			scrollbarWidths = this.scroller.getScrollbarWidths();
  
  			if (scrollbarWidths.left || scrollbarWidths.right) { // using scrollbars?
  
  				// make the all-day and header rows lines up
  				compensateScroll(this.noScrollRowEls, scrollbarWidths);
  
  				// the scrollbar compensation might have changed text flow, which might affect height, so recalculate
  				// and reapply the desired height to the scroller.
  				scrollerHeight = this.computeScrollerHeight(totalHeight);
  				this.scroller.setHeight(scrollerHeight);
  			}
  
  			// guarantees the same scrollbar widths
  			this.scroller.lockOverflow(scrollbarWidths);
  
  			// if there's any space below the slats, show the horizontal rule.
  			// this won't cause any new overflow, because lockOverflow already called.
  			if (this.timeGrid.getTotalSlatHeight() < scrollerHeight) {
  				this.bottomRuleEl.show();
  			}
  		}
  	},
  
  
  	// given a desired total height of the view, returns what the height of the scroller should be
  	computeScrollerHeight: function(totalHeight) {
  		return totalHeight -
  			subtractInnerElHeight(this.el, this.scroller.el); // everything that's NOT the scroller
  	},
  
  
  	/* Scroll
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Computes the initial pre-configured scroll state prior to allowing the user to change it
  	computeInitialScroll: function() {
  		var scrollTime = moment.duration(this.opt('scrollTime'));
  		var top = this.timeGrid.computeTimeTop(scrollTime);
  
  		// zoom can give weird floating-point values. rather scroll a little bit further
  		top = Math.ceil(top);
  
  		if (top) {
  			top++; // to overcome top border that slots beyond the first have. looks better
  		}
  
  		return top;
  	},
  
  
  	queryScroll: function() {
  		return this.scroller.getScrollTop();
  	},
  
  
  	setScroll: function(top) {
  		this.scroller.setScrollTop(top);
  	},
  
  
  	/* Hit Areas
  	------------------------------------------------------------------------------------------------------------------*/
  	// forward all hit-related method calls to the grids (dayGrid might not be defined)
  
  
  	prepareHits: function() {
  		this.timeGrid.prepareHits();
  		if (this.dayGrid) {
  			this.dayGrid.prepareHits();
  		}
  	},
  
  
  	releaseHits: function() {
  		this.timeGrid.releaseHits();
  		if (this.dayGrid) {
  			this.dayGrid.releaseHits();
  		}
  	},
  
  
  	queryHit: function(left, top) {
  		var hit = this.timeGrid.queryHit(left, top);
  
  		if (!hit && this.dayGrid) {
  			hit = this.dayGrid.queryHit(left, top);
  		}
  
  		return hit;
  	},
  
  
  	getHitSpan: function(hit) {
  		// TODO: hit.component is set as a hack to identify where the hit came from
  		return hit.component.getHitSpan(hit);
  	},
  
  
  	getHitEl: function(hit) {
  		// TODO: hit.component is set as a hack to identify where the hit came from
  		return hit.component.getHitEl(hit);
  	},
  
  
  	/* Events
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders events onto the view and populates the View's segment array
  	renderEvents: function(events) {
  		var dayEvents = [];
  		var timedEvents = [];
  		var daySegs = [];
  		var timedSegs;
  		var i;
  
  		// separate the events into all-day and timed
  		for (i = 0; i < events.length; i++) {
  			if (events[i].allDay) {
  				dayEvents.push(events[i]);
  			}
  			else {
  				timedEvents.push(events[i]);
  			}
  		}
  
  		// render the events in the subcomponents
  		timedSegs = this.timeGrid.renderEvents(timedEvents);
  		if (this.dayGrid) {
  			daySegs = this.dayGrid.renderEvents(dayEvents);
  		}
  
  		// the all-day area is flexible and might have a lot of events, so shift the height
  		this.updateHeight();
  	},
  
  
  	// Retrieves all segment objects that are rendered in the view
  	getEventSegs: function() {
  		return this.timeGrid.getEventSegs().concat(
  			this.dayGrid ? this.dayGrid.getEventSegs() : []
  		);
  	},
  
  
  	// Unrenders all event elements and clears internal segment data
  	unrenderEvents: function() {
  
  		// unrender the events in the subcomponents
  		this.timeGrid.unrenderEvents();
  		if (this.dayGrid) {
  			this.dayGrid.unrenderEvents();
  		}
  
  		// we DON'T need to call updateHeight() because
  		// a renderEvents() call always happens after this, which will eventually call updateHeight()
  	},
  
  
  	/* Dragging (for events and external elements)
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// A returned value of `true` signals that a mock "helper" event has been rendered.
  	renderDrag: function(dropLocation, seg) {
  		if (dropLocation.start.hasTime()) {
  			return this.timeGrid.renderDrag(dropLocation, seg);
  		}
  		else if (this.dayGrid) {
  			return this.dayGrid.renderDrag(dropLocation, seg);
  		}
  	},
  
  
  	unrenderDrag: function() {
  		this.timeGrid.unrenderDrag();
  		if (this.dayGrid) {
  			this.dayGrid.unrenderDrag();
  		}
  	},
  
  
  	/* Selection
  	------------------------------------------------------------------------------------------------------------------*/
  
  
  	// Renders a visual indication of a selection
  	renderSelection: function(span) {
  		if (span.start.hasTime() || span.end.hasTime()) {
  			this.timeGrid.renderSelection(span);
  		}
  		else if (this.dayGrid) {
  			this.dayGrid.renderSelection(span);
  		}
  	},
  
  
  	// Unrenders a visual indications of a selection
  	unrenderSelection: function() {
  		this.timeGrid.unrenderSelection();
  		if (this.dayGrid) {
  			this.dayGrid.unrenderSelection();
  		}
  	}
  
  });
  
  
  // Methods that will customize the rendering behavior of the AgendaView's timeGrid
  // TODO: move into TimeGrid
  var agendaTimeGridMethods = {
  
  
  	// Generates the HTML that will go before the day-of week header cells
  	renderHeadIntroHtml: function() {
  		var view = this.view;
  		var weekText;
  
  		if (view.opt('weekNumbers')) {
  			weekText = this.start.format(view.opt('smallWeekFormat'));
  
  			return '' +
  				'<th class="fc-axis fc-week-number ' + view.widgetHeaderClass + '" ' + view.axisStyleAttr() + '>' +
  					view.buildGotoAnchorHtml( // aside from link, important for matchCellWidths
  						{ date: this.start, type: 'week', forceOff: this.colCnt > 1 },
  						htmlEscape(weekText) // inner HTML
  					) +
  				'</th>';
  		}
  		else {
  			return '<th class="fc-axis ' + view.widgetHeaderClass + '" ' + view.axisStyleAttr() + '></th>';
  		}
  	},
  
  
  	// Generates the HTML that goes before the bg of the TimeGrid slot area. Long vertical column.
  	renderBgIntroHtml: function() {
  		var view = this.view;
  
  		return '<td class="fc-axis ' + view.widgetContentClass + '" ' + view.axisStyleAttr() + '></td>';
  	},
  
  
  	// Generates the HTML that goes before all other types of cells.
  	// Affects content-skeleton, helper-skeleton, highlight-skeleton for both the time-grid and day-grid.
  	renderIntroHtml: function() {
  		var view = this.view;
  
  		return '<td class="fc-axis" ' + view.axisStyleAttr() + '></td>';
  	}
  
  };
  
  
  // Methods that will customize the rendering behavior of the AgendaView's dayGrid
  var agendaDayGridMethods = {
  
  
  	// Generates the HTML that goes before the all-day cells
  	renderBgIntroHtml: function() {
  		var view = this.view;
  
  		return '' +
  			'<td class="fc-axis ' + view.widgetContentClass + '" ' + view.axisStyleAttr() + '>' +
  				'<span>' + // needed for matchCellWidths
  					view.getAllDayHtml() +
  				'</span>' +
  			'</td>';
  	},
  
  
  	// Generates the HTML that goes before all other types of cells.
  	// Affects content-skeleton, helper-skeleton, highlight-skeleton for both the time-grid and day-grid.
  	renderIntroHtml: function() {
  		var view = this.view;
  
  		return '<td class="fc-axis" ' + view.axisStyleAttr() + '></td>';
  	}
  
  };
  
  ;;
  
  var AGENDA_ALL_DAY_EVENT_LIMIT = 5;
  
  // potential nice values for the slot-duration and interval-duration
  // from largest to smallest
  var AGENDA_STOCK_SUB_DURATIONS = [
  	{ hours: 1 },
  	{ minutes: 30 },
  	{ minutes: 15 },
  	{ seconds: 30 },
  	{ seconds: 15 }
  ];
  
  fcViews.agenda = {
  	'class': AgendaView,
  	defaults: {
  		allDaySlot: true,
  		slotDuration: '00:30:00',
  		minTime: '00:00:00',
  		maxTime: '24:00:00',
  		slotEventOverlap: true // a bad name. confused with overlap/constraint system
  	}
  };
  
  fcViews.agendaDay = {
  	type: 'agenda',
  	duration: { days: 1 }
  };
  
  fcViews.agendaWeek = {
  	type: 'agenda',
  	duration: { weeks: 1 }
  };
  ;;
  
  /*
  Responsible for the scroller, and forwarding event-related actions into the "grid"
  */
  var ListView = View.extend({
  
  	grid: null,
  	scroller: null,
  
  	initialize: function() {
  		this.grid = new ListViewGrid(this);
  		this.scroller = new Scroller({
  			overflowX: 'hidden',
  			overflowY: 'auto'
  		});
  	},
  
  	setRange: function(range) {
  		View.prototype.setRange.call(this, range); // super
  
  		this.grid.setRange(range); // needs to process range-related options
  	},
  
  	renderSkeleton: function() {
  		this.el.addClass(
  			'fc-list-view ' +
  			this.widgetContentClass
  		);
  
  		this.scroller.render();
  		this.scroller.el.appendTo(this.el);
  
  		this.grid.setElement(this.scroller.scrollEl);
  	},
  
  	unrenderSkeleton: function() {
  		this.scroller.destroy(); // will remove the Grid too
  	},
  
  	setHeight: function(totalHeight, isAuto) {
  		this.scroller.setHeight(this.computeScrollerHeight(totalHeight));
  	},
  
  	computeScrollerHeight: function(totalHeight) {
  		return totalHeight -
  			subtractInnerElHeight(this.el, this.scroller.el); // everything that's NOT the scroller
  	},
  
  	renderEvents: function(events) {
  		this.grid.renderEvents(events);
  	},
  
  	unrenderEvents: function() {
  		this.grid.unrenderEvents();
  	},
  
  	isEventResizable: function(event) {
  		return false;
  	},
  
  	isEventDraggable: function(event) {
  		return false;
  	}
  
  });
  
  /*
  Responsible for event rendering and user-interaction.
  Its "el" is the inner-content of the above view's scroller.
  */
  var ListViewGrid = Grid.extend({
  
  	segSelector: '.fc-list-item', // which elements accept event actions
  	hasDayInteractions: false, // no day selection or day clicking
  
  	// slices by day
  	spanToSegs: function(span) {
  		var view = this.view;
  		var dayStart = view.start.clone().time(0); // timed, so segs get times!
  		var dayIndex = 0;
  		var seg;
  		var segs = [];
  
  		while (dayStart < view.end) {
  
  			seg = intersectRanges(span, {
  				start: dayStart,
  				end: dayStart.clone().add(1, 'day')
  			});
  
  			if (seg) {
  				seg.dayIndex = dayIndex;
  				segs.push(seg);
  			}
  
  			dayStart.add(1, 'day');
  			dayIndex++;
  
  			// detect when span won't go fully into the next day,
  			// and mutate the latest seg to the be the end.
  			if (
  				seg && !seg.isEnd && span.end.hasTime() &&
  				span.end < dayStart.clone().add(this.view.nextDayThreshold)
  			) {
  				seg.end = span.end.clone();
  				seg.isEnd = true;
  				break;
  			}
  		}
  
  		return segs;
  	},
  
  	// like "4:00am"
  	computeEventTimeFormat: function() {
  		return this.view.opt('mediumTimeFormat');
  	},
  
  	// for events with a url, the whole <tr> should be clickable,
  	// but it's impossible to wrap with an <a> tag. simulate this.
  	handleSegClick: function(seg, ev) {
  		var url;
  
  		Grid.prototype.handleSegClick.apply(this, arguments); // super. might prevent the default action
  
  		// not clicking on or within an <a> with an href
  		if (!$(ev.target).closest('a[href]').length) {
  			url = seg.event.url;
  			if (url && !ev.isDefaultPrevented()) { // jsEvent not cancelled in handler
  				window.location.href = url; // simulate link click
  			}
  		}
  	},
  
  	// returns list of foreground segs that were actually rendered
  	renderFgSegs: function(segs) {
  		segs = this.renderFgSegEls(segs); // might filter away hidden events
  
  		if (!segs.length) {
  			this.renderEmptyMessage();
  		}
  		else {
  			this.renderSegList(segs);
  		}
  
  		return segs;
  	},
  
  	renderEmptyMessage: function() {
  		this.el.html(
  			'<div class="fc-list-empty-wrap2">' + // TODO: try less wraps
  			'<div class="fc-list-empty-wrap1">' +
  			'<div class="fc-list-empty">' +
  				htmlEscape(this.view.opt('noEventsMessage')) +
  			'</div>' +
  			'</div>' +
  			'</div>'
  		);
  	},
  
  	// render the event segments in the view
  	renderSegList: function(allSegs) {
  		var segsByDay = this.groupSegsByDay(allSegs); // sparse array
  		var dayIndex;
  		var daySegs;
  		var i;
  		var tableEl = $('<table class="fc-list-table"><tbody/></table>');
  		var tbodyEl = tableEl.find('tbody');
  
  		for (dayIndex = 0; dayIndex < segsByDay.length; dayIndex++) {
  			daySegs = segsByDay[dayIndex];
  			if (daySegs) { // sparse array, so might be undefined
  
  				// append a day header
  				tbodyEl.append(this.dayHeaderHtml(
  					this.view.start.clone().add(dayIndex, 'days')
  				));
  
  				this.sortEventSegs(daySegs);
  
  				for (i = 0; i < daySegs.length; i++) {
  					tbodyEl.append(daySegs[i].el); // append event row
  				}
  			}
  		}
  
  		this.el.empty().append(tableEl);
  	},
  
  	// Returns a sparse array of arrays, segs grouped by their dayIndex
  	groupSegsByDay: function(segs) {
  		var segsByDay = []; // sparse array
  		var i, seg;
  
  		for (i = 0; i < segs.length; i++) {
  			seg = segs[i];
  			(segsByDay[seg.dayIndex] || (segsByDay[seg.dayIndex] = []))
  				.push(seg);
  		}
  
  		return segsByDay;
  	},
  
  	// generates the HTML for the day headers that live amongst the event rows
  	dayHeaderHtml: function(dayDate) {
  		var view = this.view;
  		var mainFormat = view.opt('listDayFormat');
  		var altFormat = view.opt('listDayAltFormat');
  
  		return '<tr class="fc-list-heading" data-date="' + dayDate.format('YYYY-MM-DD') + '">' +
  			'<td class="' + view.widgetHeaderClass + '" colspan="3">' +
  				(mainFormat ?
  					view.buildGotoAnchorHtml(
  						dayDate,
  						{ 'class': 'fc-list-heading-main' },
  						htmlEscape(dayDate.format(mainFormat)) // inner HTML
  					) :
  					'') +
  				(altFormat ?
  					view.buildGotoAnchorHtml(
  						dayDate,
  						{ 'class': 'fc-list-heading-alt' },
  						htmlEscape(dayDate.format(altFormat)) // inner HTML
  					) :
  					'') +
  			'</td>' +
  		'</tr>';
  	},
  
  	// generates the HTML for a single event row
  	fgSegHtml: function(seg) {
  		var view = this.view;
  		var classes = [ 'fc-list-item' ].concat(this.getSegCustomClasses(seg));
  		var bgColor = this.getSegBackgroundColor(seg);
  		var event = seg.event;
  		var url = event.url;
  		var timeHtml;
  
  		if (event.allDay) {
  			timeHtml = view.getAllDayHtml();
  		}
  		else if (view.isMultiDayEvent(event)) { // if the event appears to span more than one day
  			if (seg.isStart || seg.isEnd) { // outer segment that probably lasts part of the day
  				timeHtml = htmlEscape(this.getEventTimeText(seg));
  			}
  			else { // inner segment that lasts the whole day
  				timeHtml = view.getAllDayHtml();
  			}
  		}
  		else {
  			// Display the normal time text for the *event's* times
  			timeHtml = htmlEscape(this.getEventTimeText(event));
  		}
  
  		if (url) {
  			classes.push('fc-has-url');
  		}
  
  		return '<tr class="' + classes.join(' ') + '">' +
  			(this.displayEventTime ?
  				'<td class="fc-list-item-time ' + view.widgetContentClass + '">' +
  					(timeHtml || '') +
  				'</td>' :
  				'') +
  			'<td class="fc-list-item-marker ' + view.widgetContentClass + '">' +
  				'<span class="fc-event-dot"' +
  				(bgColor ?
  					' style="background-color:' + bgColor + '"' :
  					'') +
  				'></span>' +
  			'</td>' +
  			'<td class="fc-list-item-title ' + view.widgetContentClass + '">' +
  				'<a' + (url ? ' href="' + htmlEscape(url) + '"' : '') + '>' +
  					htmlEscape(seg.event.title || '') +
  				'</a>' +
  			'</td>' +
  		'</tr>';
  	}
  
  });
  
  ;;
  
  fcViews.list = {
  	'class': ListView,
  	buttonTextKey: 'list', // what to lookup in locale files
  	defaults: {
  		buttonText: 'list', // text to display for English
  		listDayFormat: 'LL', // like "January 1, 2016"
  		noEventsMessage: 'No events to display'
  	}
  };
  
  fcViews.listDay = {
  	type: 'list',
  	duration: { days: 1 },
  	defaults: {
  		listDayFormat: 'dddd' // day-of-week is all we need. full date is probably in header
  	}
  };
  
  fcViews.listWeek = {
  	type: 'list',
  	duration: { weeks: 1 },
  	defaults: {
  		listDayFormat: 'dddd', // day-of-week is more important
  		listDayAltFormat: 'LL'
  	}
  };
  
  fcViews.listMonth = {
  	type: 'list',
  	duration: { month: 1 },
  	defaults: {
  		listDayAltFormat: 'dddd' // day-of-week is nice-to-have
  	}
  };
  
  fcViews.listYear = {
  	type: 'list',
  	duration: { year: 1 },
  	defaults: {
  		listDayAltFormat: 'dddd' // day-of-week is nice-to-have
  	}
  };
  
  ;;
  
  return FC; // export for Node/CommonJS
  });
  