text: /* Pretty handling of time axes.
  
  Copyright (c) 2007-2013 IOLA and Ole Laursen.
  Licensed under the MIT license.
  
  Set axis.mode to "time" to enable. See the section "Time series data" in
  API.txt for details.
  
  */
  
  (function($) {
  
  	var options = {
  		xaxis: {
  			timezone: null,		// "browser" for local to the client or timezone for timezone-js
  			timeformat: null,	// format string to use
  			twelveHourClock: false,	// 12 or 24 time in time mode
  			monthNames: null	// list of names of months
  		}
  	};
  
  	// round to nearby lower multiple of base
  
  	function floorInBase(n, base) {
  		return base * Math.floor(n / base);
  	}
  
  	// Returns a string with the date d formatted according to fmt.
  	// A subset of the Open Group's strftime format is supported.
  
  	function formatDate(d, fmt, monthNames, dayNames) {
  
  		if (typeof d.strftime == "function") {
  			return d.strftime(fmt);
  		}
  
  		var leftPad = function(n, pad) {
  			n = "" + n;
  			pad = "" + (pad == null ? "0" : pad);
  			return n.length == 1 ? pad + n : n;
  		};
  
  		var r = [];
  		var escape = false;
  		var hours = d.getHours();
  		var isAM = hours < 12;
  
  		/*
  		*     var common_SundaysAndHolid="{{admin_language('common_SundaysAndHolid')}}";
      var common_Saturday="{{admin_language('common_Saturday')}}";
      var common_Friday="{{admin_language('common_Friday')}}";
      var common_Thursday="{{admin_language('common_Thursday')}}";
      var common_Wednesday="{{admin_language('common_Wednesday')}}";
      var common_Tuesday="{{admin_language('common_Tuesday')}}";
      var common_Monday="{{admin_language('common_Monday')}}";
  
      var common_December="{{admin_language('common_December')}}";
      var common_November="{{admin_language('common_November')}}";
      var common_October="{{admin_language('common_October')}}";
      var common_September="{{admin_language('common_September')}}";
      var common_August="{{admin_language('common_August')}}";
      var common_July="{{admin_language('common_July')}}";
      var common_June="{{admin_language('common_June')}}";
      var common_May="{{admin_language('common_May')}}";
      var common_April="{{admin_language('common_April')}}";
      var common_March="{{admin_language('common_March')}}";
      var common_February="{{admin_language('common_February')}}";
      var common_January="{{admin_language('common_January')}}";
  
  		* */
  		if (monthNames == null) {
              monthNames = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
  		}
  
  		if (dayNames == null) {
  			dayNames = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
  		}
  
  		var hours12;
  
  		if (hours > 12) {
  			hours12 = hours - 12;
  		} else if (hours == 0) {
  			hours12 = 12;
  		} else {
  			hours12 = hours;
  		}
  
  		for (var i = 0; i < fmt.length; ++i) {
  
  			var c = fmt.charAt(i);
  
  			if (escape) {
  				switch (c) {
  					case 'a': c = "" + dayNames[d.getDay()]; break;
  					case 'b': c = "" + monthNames[d.getMonth()]; break;
  					case 'd': c = leftPad(d.getDate()); break;
  					case 'e': c = leftPad(d.getDate(), " "); break;
  					case 'h':	// For back-compat with 0.7; remove in 1.0
  					case 'H': c = leftPad(hours); break;
  					case 'I': c = leftPad(hours12); break;
  					case 'l': c = leftPad(hours12, " "); break;
  					case 'm': c = leftPad(d.getMonth() + 1); break;
  					case 'M': c = leftPad(d.getMinutes()); break;
  					// quarters not in Open Group's strftime specification
  					case 'q':
  						c = "" + (Math.floor(d.getMonth() / 3) + 1); break;
  					case 'S': c = leftPad(d.getSeconds()); break;
  					case 'y': c = leftPad(d.getFullYear() % 100); break;
  					case 'Y': c = "" + d.getFullYear(); break;
  					case 'p': c = (isAM) ? ("" + "am") : ("" + "pm"); break;
  					case 'P': c = (isAM) ? ("" + "AM") : ("" + "PM"); break;
  					case 'w': c = "" + d.getDay(); break;
  				}
  				r.push(c);
  				escape = false;
  			} else {
  				if (c == "%") {
  					escape = true;
  				} else {
  					r.push(c);
  				}
  			}
  		}
  
  		return r.join("");
  	}
  
  	// To have a consistent view of time-based data independent of which time
  	// zone the client happens to be in we need a date-like object independent
  	// of time zones.  This is done through a wrapper that only calls the UTC
  	// versions of the accessor methods.
  
  	function makeUtcWrapper(d) {
  
  		function addProxyMethod(sourceObj, sourceMethod, targetObj, targetMethod) {
  			sourceObj[sourceMethod] = function() {
  				return targetObj[targetMethod].apply(targetObj, arguments);
  			};
  		};
  
  		var utc = {
  			date: d
  		};
  
  		// support strftime, if found
  
  		if (d.strftime != undefined) {
  			addProxyMethod(utc, "strftime", d, "strftime");
  		}
  
  		addProxyMethod(utc, "getTime", d, "getTime");
  		addProxyMethod(utc, "setTime", d, "setTime");
  
  		var props = ["Date", "Day", "FullYear", "Hours", "Milliseconds", "Minutes", "Month", "Seconds"];
  
  		for (var p = 0; p < props.length; p++) {
  			addProxyMethod(utc, "get" + props[p], d, "getUTC" + props[p]);
  			addProxyMethod(utc, "set" + props[p], d, "setUTC" + props[p]);
  		}
  
  		return utc;
  	};
  
  	// select time zone strategy.  This returns a date-like object tied to the
  	// desired timezone
  
  	function dateGenerator(ts, opts) {
  		if (opts.timezone == "browser") {
  			return new Date(ts);
  		} else if (!opts.timezone || opts.timezone == "utc") {
  			return makeUtcWrapper(new Date(ts));
  		} else if (typeof timezoneJS != "undefined" && typeof timezoneJS.Date != "undefined") {
  			var d = new timezoneJS.Date();
  			// timezone-js is fickle, so be sure to set the time zone before
  			// setting the time.
  			d.setTimezone(opts.timezone);
  			d.setTime(ts);
  			return d;
  		} else {
  			return makeUtcWrapper(new Date(ts));
  		}
  	}
  	
  	// map of app. size of time units in milliseconds
  
  	var timeUnitSize = {
  		"second": 1000,
  		"minute": 60 * 1000,
  		"hour": 60 * 60 * 1000,
  		"day": 24 * 60 * 60 * 1000,
  		"month": 30 * 24 * 60 * 60 * 1000,
  		"quarter": 3 * 30 * 24 * 60 * 60 * 1000,
  		"year": 365.2425 * 24 * 60 * 60 * 1000
  	};
  
  	// the allowed tick sizes, after 1 year we use
  	// an integer algorithm
  
  	var baseSpec = [
  		[1, "second"], [2, "second"], [5, "second"], [10, "second"],
  		[30, "second"], 
  		[1, "minute"], [2, "minute"], [5, "minute"], [10, "minute"],
  		[30, "minute"], 
  		[1, "hour"], [2, "hour"], [4, "hour"],
  		[8, "hour"], [12, "hour"],
  		[1, "day"], [2, "day"], [3, "day"],
  		[0.25, "month"], [0.5, "month"], [1, "month"],
  		[2, "month"]
  	];
  
  	// we don't know which variant(s) we'll need yet, but generating both is
  	// cheap
  
  	var specMonths = baseSpec.concat([[3, "month"], [6, "month"],
  		[1, "year"]]);
  	var specQuarters = baseSpec.concat([[1, "quarter"], [2, "quarter"],
  		[1, "year"]]);
  
  	function init(plot) {
  		plot.hooks.processOptions.push(function (plot, options) {
  			$.each(plot.getAxes(), function(axisName, axis) {
  
  				var opts = axis.options;
  
  				if (opts.mode == "time") {
  					axis.tickGenerator = function(axis) {
  
  						var ticks = [];
  						var d = dateGenerator(axis.min, opts);
  						var minSize = 0;
  
  						// make quarter use a possibility if quarters are
  						// mentioned in either of these options
  
  						var spec = (opts.tickSize && opts.tickSize[1] ===
  							"quarter") ||
  							(opts.minTickSize && opts.minTickSize[1] ===
  							"quarter") ? specQuarters : specMonths;
  
  						if (opts.minTickSize != null) {
  							if (typeof opts.tickSize == "number") {
  								minSize = opts.tickSize;
  							} else {
  								minSize = opts.minTickSize[0] * timeUnitSize[opts.minTickSize[1]];
  							}
  						}
  
  						for (var i = 0; i < spec.length - 1; ++i) {
  							if (axis.delta < (spec[i][0] * timeUnitSize[spec[i][1]]
  											  + spec[i + 1][0] * timeUnitSize[spec[i + 1][1]]) / 2
  								&& spec[i][0] * timeUnitSize[spec[i][1]] >= minSize) {
  								break;
  							}
  						}
  
  						var size = spec[i][0];
  						var unit = spec[i][1];
  
  						// special-case the possibility of several years
  
  						if (unit == "year") {
  
  							// if given a minTickSize in years, just use it,
  							// ensuring that it's an integer
  
  							if (opts.minTickSize != null && opts.minTickSize[1] == "year") {
  								size = Math.floor(opts.minTickSize[0]);
  							} else {
  
  								var magn = Math.pow(10, Math.floor(Math.log(axis.delta / timeUnitSize.year) / Math.LN10));
  								var norm = (axis.delta / timeUnitSize.year) / magn;
  
  								if (norm < 1.5) {
  									size = 1;
  								} else if (norm < 3) {
  									size = 2;
  								} else if (norm < 7.5) {
  									size = 5;
  								} else {
  									size = 10;
  								}
  
  								size *= magn;
  							}
  
  							// minimum size for years is 1
  
  							if (size < 1) {
  								size = 1;
  							}
  						}
  
  						axis.tickSize = opts.tickSize || [size, unit];
  						var tickSize = axis.tickSize[0];
  						unit = axis.tickSize[1];
  
  						var step = tickSize * timeUnitSize[unit];
  
  						if (unit == "second") {
  							d.setSeconds(floorInBase(d.getSeconds(), tickSize));
  						} else if (unit == "minute") {
  							d.setMinutes(floorInBase(d.getMinutes(), tickSize));
  						} else if (unit == "hour") {
  							d.setHours(floorInBase(d.getHours(), tickSize));
  						} else if (unit == "month") {
  							d.setMonth(floorInBase(d.getMonth(), tickSize));
  						} else if (unit == "quarter") {
  							d.setMonth(3 * floorInBase(d.getMonth() / 3,
  								tickSize));
  						} else if (unit == "year") {
  							d.setFullYear(floorInBase(d.getFullYear(), tickSize));
  						}
  
  						// reset smaller components
  
  						d.setMilliseconds(0);
  
  						if (step >= timeUnitSize.minute) {
  							d.setSeconds(0);
  						}
  						if (step >= timeUnitSize.hour) {
  							d.setMinutes(0);
  						}
  						if (step >= timeUnitSize.day) {
  							d.setHours(0);
  						}
  						if (step >= timeUnitSize.day * 4) {
  							d.setDate(1);
  						}
  						if (step >= timeUnitSize.month * 2) {
  							d.setMonth(floorInBase(d.getMonth(), 3));
  						}
  						if (step >= timeUnitSize.quarter * 2) {
  							d.setMonth(floorInBase(d.getMonth(), 6));
  						}
  						if (step >= timeUnitSize.year) {
  							d.setMonth(0);
  						}
  
  						var carry = 0;
  						var v = Number.NaN;
  						var prev;
  
  						do {
  
  							prev = v;
  							v = d.getTime();
  							ticks.push(v);
  
  							if (unit == "month" || unit == "quarter") {
  								if (tickSize < 1) {
  
  									// a bit complicated - we'll divide the
  									// month/quarter up but we need to take
  									// care of fractions so we don't end up in
  									// the middle of a day
  
  									d.setDate(1);
  									var start = d.getTime();
  									d.setMonth(d.getMonth() +
  										(unit == "quarter" ? 3 : 1));
  									var end = d.getTime();
  									d.setTime(v + carry * timeUnitSize.hour + (end - start) * tickSize);
  									carry = d.getHours();
  									d.setHours(0);
  								} else {
  									d.setMonth(d.getMonth() +
  										tickSize * (unit == "quarter" ? 3 : 1));
  								}
  							} else if (unit == "year") {
  								d.setFullYear(d.getFullYear() + tickSize);
  							} else {
  								d.setTime(v + step);
  							}
  						} while (v < axis.max && v != prev);
  
  						return ticks;
  					};
  
  					axis.tickFormatter = function (v, axis) {
  
  						var d = dateGenerator(v, axis.options);
  
  						// first check global format
  
  						if (opts.timeformat != null) {
  							return formatDate(d, opts.timeformat, opts.monthNames, opts.dayNames);
  						}
  
  						// possibly use quarters if quarters are mentioned in
  						// any of these places
  
  						var useQuarters = (axis.options.tickSize &&
  								axis.options.tickSize[1] == "quarter") ||
  							(axis.options.minTickSize &&
  								axis.options.minTickSize[1] == "quarter");
  
  						var t = axis.tickSize[0] * timeUnitSize[axis.tickSize[1]];
  						var span = axis.max - axis.min;
  						var suffix = (opts.twelveHourClock) ? " %p" : "";
  						var hourCode = (opts.twelveHourClock) ? "%I" : "%H";
  						var fmt;
  
  						if (t < timeUnitSize.minute) {
  							fmt = hourCode + ":%M:%S" + suffix;
  						} else if (t < timeUnitSize.day) {
  							if (span < 2 * timeUnitSize.day) {
  								fmt = hourCode + ":%M" + suffix;
  							} else {
  								fmt = "%b %d " + hourCode + ":%M" + suffix;
  							}
  						} else if (t < timeUnitSize.month) {
  							fmt = "%b %d";
  						} else if ((useQuarters && t < timeUnitSize.quarter) ||
  							(!useQuarters && t < timeUnitSize.year)) {
  							if (span < timeUnitSize.year) {
  								fmt = "%b";
  							} else {
  								fmt = "%b %Y";
  							}
  						} else if (useQuarters && t < timeUnitSize.year) {
  							if (span < timeUnitSize.year) {
  								fmt = "Q%q";
  							} else {
  								fmt = "Q%q %Y";
  							}
  						} else {
  							fmt = "%Y";
  						}
  
  						var rt = formatDate(d, fmt, opts.monthNames, opts.dayNames);
  
  						return rt;
  					};
  				}
  			});
  		});
  	}
  
  	$.plot.plugins.push({
  		init: init,
  		options: options,
  		name: 'time',
  		version: '1.0'
  	});
  
  	// Time-axis support used to be in Flot core, which exposed the
  	// formatDate function on the plot object.  Various plugins depend
  	// on the function, so we need to re-expose it here.
  
  	$.plot.formatDate = formatDate;
  
  })(jQuery);
  