text: /**
   * Super simple wysiwyg editor v0.8.8
   * http://summernote.org/
   *
   * summernote.js
   * Copyright 2013- Alan Hong. and other contributors
   * summernote may be freely distributed under the MIT license./
   *
   * Date: 2017-09-09T11:03Z
   */
  (function (factory) {
      /* global define */
      if (typeof define === 'function' && define.amd) {
          // AMD. Register as an anonymous module.
          define(['jquery'], factory);
      } else if (typeof module === 'object' && module.exports) {
          // Node/CommonJS
          module.exports = factory(require('jquery'));
      } else {
          // Browser globals
          factory(window.jQuery);
      }
  }(function ($) {
      'use strict';
  
      var isSupportAmd = typeof define === 'function' && define.amd;
  
      /**
       * returns whether font is installed or not.
       *
       * @system {String} fontName
       * @return {Boolean}
       */
      var isFontInstalled = function (fontName) {
          var testFontName = fontName === 'Comic Sans MS' ? 'Courier New' : 'Comic Sans MS';
          var $tester = $('<div>').css({
              position: 'absolute',
              left: '-9999px',
              top: '-9999px',
              fontSize: '200px'
          }).text('mmmmmmmmmwwwwwww').appendTo(document.body);
  
          var originalWidth = $tester.css('fontFamily', testFontName).width();
          var width = $tester.css('fontFamily', fontName + ',' + testFontName).width();
  
          $tester.remove();
  
          return originalWidth !== width;
      };
  
      var userAgent = navigator.userAgent;
      var isMSIE = /MSIE|Trident/i.test(userAgent);
      var browserVersion;
      if (isMSIE) {
          var matches = /MSIE (\d+[.]\d+)/.exec(userAgent);
          if (matches) {
              browserVersion = parseFloat(matches[1]);
          }
          matches = /Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/.exec(userAgent);
          if (matches) {
              browserVersion = parseFloat(matches[1]);
          }
      }
  
      var isEdge = /Edge\/\d+/.test(userAgent);
  
      var hasCodeMirror = !!window.CodeMirror;
      if (!hasCodeMirror && isSupportAmd) {
          // Webpack
          if (typeof __webpack_require__ === 'function') { // jshint ignore:line
              try {
                  // If CodeMirror can't be resolved, `require.resolve` will throw an
                  // exception and `hasCodeMirror` won't be set to `true`.
                  require.resolve('codemirror');
                  hasCodeMirror = true;
              } catch (e) {
                  // do nothing
              }
          } else if (typeof require !== 'undefined') {
              // Browserify
              if (typeof require.resolve !== 'undefined') {
                  try {
                      // If CodeMirror can't be resolved, `require.resolve` will throw an
                      // exception and `hasCodeMirror` won't be set to `true`.
                      require.resolve('codemirror');
                      hasCodeMirror = true;
                  } catch (e) {
                      // do nothing
                  }
                  // Almond/Require
              } else if (typeof require.specified !== 'undefined') {
                  hasCodeMirror = require.specified('codemirror');
              }
          }
      }
  
      var isSupportTouch =
          (('ontouchstart' in window) ||
              (navigator.MaxTouchPoints > 0) ||
              (navigator.msMaxTouchPoints > 0));
  
      /**
       * @class core.agent
       *
       * Object which check platform and agent
       *
       * @singleton
       * @alternateClassName agent
       */
      var agent = {
          isMac: navigator.appVersion.indexOf('Mac') > -1,
          isMSIE: isMSIE,
          isEdge: isEdge,
          isFF: !isEdge && /firefox/i.test(userAgent),
          isPhantom: /PhantomJS/i.test(userAgent),
          isWebkit: !isEdge && /webkit/i.test(userAgent),
          isChrome: !isEdge && /chrome/i.test(userAgent),
          isSafari: !isEdge && /safari/i.test(userAgent),
          browserVersion: browserVersion,
          jqueryVersion: parseFloat($.fn.jquery),
          isSupportAmd: isSupportAmd,
          isSupportTouch: isSupportTouch,
          hasCodeMirror: hasCodeMirror,
          isFontInstalled: isFontInstalled,
          isW3CRangeSupport: !!document.createRange
      };
  
      /**
       * @class core.func
       *
       * func utils (for high-order func's arg)
       *
       * @singleton
       * @alternateClassName func
       */
      var func = (function () {
          var eq = function (itemA) {
              return function (itemB) {
                  return itemA === itemB;
              };
          };
  
          var eq2 = function (itemA, itemB) {
              return itemA === itemB;
          };
  
          var peq2 = function (propName) {
              return function (itemA, itemB) {
                  return itemA[propName] === itemB[propName];
              };
          };
  
          var ok = function () {
              return true;
          };
  
          var fail = function () {
              return false;
          };
  
          var not = function (f) {
              return function () {
                  return !f.apply(f, arguments);
              };
          };
  
          var and = function (fA, fB) {
              return function (item) {
                  return fA(item) && fB(item);
              };
          };
  
          var self = function (a) {
              return a;
          };
  
          var invoke = function (obj, method) {
              return function () {
                  return obj[method].apply(obj, arguments);
              };
          };
  
          var idCounter = 0;
  
          /**
           * generate a globally-unique id
           *
           * @system {String} [prefix]
           */
          var uniqueId = function (prefix) {
              var id = ++idCounter + '';
              return prefix ? prefix + id : id;
          };
  
          /**
           * returns bnd (bounds) from rect
           *
           * - IE Compatibility Issue: http://goo.gl/sRLOAo
           * - Scroll Issue: http://goo.gl/sNjUc
           *
           * @system {Rect} rect
           * @return {Object} bounds
           * @return {Number} bounds.top
           * @return {Number} bounds.left
           * @return {Number} bounds.width
           * @return {Number} bounds.height
           */
          var rect2bnd = function (rect) {
              var $document = $(document);
              return {
                  top: rect.top + $document.scrollTop(),
                  left: rect.left + $document.scrollLeft(),
                  width: rect.right - rect.left,
                  height: rect.bottom - rect.top
              };
          };
  
          /**
           * returns a copy of the object where the keys have become the values and the values the keys.
           * @system {Object} obj
           * @return {Object}
           */
          var invertObject = function (obj) {
              var inverted = {};
              for (var key in obj) {
                  if (obj.hasOwnProperty(key)) {
                      inverted[obj[key]] = key;
                  }
              }
              return inverted;
          };
  
          /**
           * @system {String} namespace
           * @system {String} [prefix]
           * @return {String}
           */
          var namespaceToCamel = function (namespace, prefix) {
              prefix = prefix || '';
              return prefix + namespace.split('.').map(function (name) {
                  return name.substring(0, 1).toUpperCase() + name.substring(1);
              }).join('');
          };
  
          /**
           * 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.
           * @system {Function} func
           * @system {Number} wait
           * @system {Boolean} immediate
           * @return {Function}
           */
          var debounce = function (func, wait, immediate) {
              var timeout;
              return function () {
                  var context = this, args = arguments;
                  var later = function () {
                      timeout = null;
                      if (!immediate) {
                          func.apply(context, args);
                      }
                  };
                  var callNow = immediate && !timeout;
                  clearTimeout(timeout);
                  timeout = setTimeout(later, wait);
                  if (callNow) {
                      func.apply(context, args);
                  }
              };
          };
  
          return {
              eq: eq,
              eq2: eq2,
              peq2: peq2,
              ok: ok,
              fail: fail,
              self: self,
              not: not,
              and: and,
              invoke: invoke,
              uniqueId: uniqueId,
              rect2bnd: rect2bnd,
              invertObject: invertObject,
              namespaceToCamel: namespaceToCamel,
              debounce: debounce
          };
      })();
  
      /**
       * @class core.list
       *
       * list utils
       *
       * @singleton
       * @alternateClassName list
       */
      var list = (function () {
          /**
           * returns the first item of an array.
           *
           * @system {Array} array
           */
          var head = function (array) {
              return array[0];
          };
  
          /**
           * returns the last item of an array.
           *
           * @system {Array} array
           */
          var last = function (array) {
              return array[array.length - 1];
          };
  
          /**
           * returns everything but the last entry of the array.
           *
           * @system {Array} array
           */
          var initial = function (array) {
              return array.slice(0, array.length - 1);
          };
  
          /**
           * returns the rest of the items in an array.
           *
           * @system {Array} array
           */
          var tail = function (array) {
              return array.slice(1);
          };
  
          /**
           * returns item of array
           */
          var find = function (array, pred) {
              for (var idx = 0, len = array.length; idx < len; idx++) {
                  var item = array[idx];
                  if (pred(item)) {
                      return item;
                  }
              }
          };
  
          /**
           * returns true if all of the values in the array pass the predicate truth test.
           */
          var all = function (array, pred) {
              for (var idx = 0, len = array.length; idx < len; idx++) {
                  if (!pred(array[idx])) {
                      return false;
                  }
              }
              return true;
          };
  
          /**
           * returns index of item
           */
          var indexOf = function (array, item) {
              return $.inArray(item, array);
          };
  
          /**
           * returns true if the value is present in the list.
           */
          var contains = function (array, item) {
              return indexOf(array, item) !== -1;
          };
  
          /**
           * get sum from a list
           *
           * @system {Array} array - array
           * @system {Function} fn - iterator
           */
          var sum = function (array, fn) {
              fn = fn || func.self;
              return array.reduce(function (memo, v) {
                  return memo + fn(v);
              }, 0);
          };
  
          /**
           * returns a copy of the collection with array type.
           * @system {Collection} collection - collection eg) node.childNodes, ...
           */
          var from = function (collection) {
              var result = [], idx = -1, length = collection.length;
              while (++idx < length) {
                  result[idx] = collection[idx];
              }
              return result;
          };
  
          /**
           * returns whether list is empty or not
           */
          var isEmpty = function (array) {
              return !array || !array.length;
          };
  
          /**
           * cluster elements by predicate function.
           *
           * @system {Array} array - array
           * @system {Function} fn - predicate function for cluster rule
           * @system {Array[]}
           */
          var clusterBy = function (array, fn) {
              if (!array.length) {
                  return [];
              }
              var aTail = tail(array);
              return aTail.reduce(function (memo, v) {
                  var aLast = last(memo);
                  if (fn(last(aLast), v)) {
                      aLast[aLast.length] = v;
                  } else {
                      memo[memo.length] = [v];
                  }
                  return memo;
              }, [[head(array)]]);
          };
  
          /**
           * returns a copy of the array with all false values removed
           *
           * @system {Array} array - array
           * @system {Function} fn - predicate function for cluster rule
           */
          var compact = function (array) {
              var aResult = [];
              for (var idx = 0, len = array.length; idx < len; idx++) {
                  if (array[idx]) {
                      aResult.push(array[idx]);
                  }
              }
              return aResult;
          };
  
          /**
           * produces a duplicate-free version of the array
           *
           * @system {Array} array
           */
          var unique = function (array) {
              var results = [];
  
              for (var idx = 0, len = array.length; idx < len; idx++) {
                  if (!contains(results, array[idx])) {
                      results.push(array[idx]);
                  }
              }
  
              return results;
          };
  
          /**
           * returns next item.
           * @system {Array} array
           */
          var next = function (array, item) {
              var idx = indexOf(array, item);
              if (idx === -1) {
                  return null;
              }
  
              return array[idx + 1];
          };
  
          /**
           * returns prev item.
           * @system {Array} array
           */
          var prev = function (array, item) {
              var idx = indexOf(array, item);
              if (idx === -1) {
                  return null;
              }
  
              return array[idx - 1];
          };
  
          return {
              head: head, last: last, initial: initial, tail: tail,
              prev: prev, next: next, find: find, contains: contains,
              all: all, sum: sum, from: from, isEmpty: isEmpty,
              clusterBy: clusterBy, compact: compact, unique: unique
          };
      })();
  
  
      var NBSP_CHAR = String.fromCharCode(160);
      var ZERO_WIDTH_NBSP_CHAR = '\ufeff';
  
      /**
       * @class core.dom
       *
       * Dom functions
       *
       * @singleton
       * @alternateClassName dom
       */
      var dom = (function () {
          /**
           * @method isEditable
           *
           * returns whether node is `note-editable` or not.
           *
           * @system {Node} node
           * @return {Boolean}
           */
          var isEditable = function (node) {
              return node && $(node).hasClass('note-editable');
          };
  
          /**
           * @method isControlSizing
           *
           * returns whether node is `note-control-sizing` or not.
           *
           * @system {Node} node
           * @return {Boolean}
           */
          var isControlSizing = function (node) {
              return node && $(node).hasClass('note-control-sizing');
          };
  
          /**
           * @method makePredByNodeName
           *
           * returns predicate which judge whether nodeName is same
           *
           * @system {String} nodeName
           * @return {Function}
           */
          var makePredByNodeName = function (nodeName) {
              nodeName = nodeName.toUpperCase();
              return function (node) {
                  return node && node.nodeName.toUpperCase() === nodeName;
              };
          };
  
          /**
           * @method isText
           *
           *
           *
           * @system {Node} node
           * @return {Boolean} true if node's type is text(3)
           */
          var isText = function (node) {
              return node && node.nodeType === 3;
          };
  
          /**
           * @method isElement
           *
           *
           *
           * @system {Node} node
           * @return {Boolean} true if node's type is element(1)
           */
          var isElement = function (node) {
              return node && node.nodeType === 1;
          };
  
          /**
           * ex) br, col, embed, hr, img, input, ...
           * @see http://www.w3.org/html/wg/drafts/html/master/syntax.html#void-elements
           */
          var isVoid = function (node) {
              return node && /^BR|^IMG|^HR|^IFRAME|^BUTTON|^INPUT/.test(node.nodeName.toUpperCase());
          };
  
          var isPara = function (node) {
              if (isEditable(node)) {
                  return false;
              }
  
              // Chrome(v31.0), FF(v25.0.1) use DIV for paragraph
              return node && /^DIV|^P|^LI|^H[1-7]/.test(node.nodeName.toUpperCase());
          };
  
          var isHeading = function (node) {
              return node && /^H[1-7]/.test(node.nodeName.toUpperCase());
          };
  
          var isPre = makePredByNodeName('PRE');
  
          var isLi = makePredByNodeName('LI');
  
          var isPurePara = function (node) {
              return isPara(node) && !isLi(node);
          };
  
          var isTable = makePredByNodeName('TABLE');
  
          var isData = makePredByNodeName('DATA');
  
          var isInline = function (node) {
              return !isBodyContainer(node) &&
                  !isList(node) &&
                  !isHr(node) &&
                  !isPara(node) &&
                  !isTable(node) &&
                  !isBlockquote(node) &&
                  !isData(node);
          };
  
          var isList = function (node) {
              return node && /^UL|^OL/.test(node.nodeName.toUpperCase());
          };
  
          var isHr = makePredByNodeName('HR');
  
          var isCell = function (node) {
              return node && /^TD|^TH/.test(node.nodeName.toUpperCase());
          };
  
          var isBlockquote = makePredByNodeName('BLOCKQUOTE');
  
          var isBodyContainer = function (node) {
              return isCell(node) || isBlockquote(node) || isEditable(node);
          };
  
          var isAnchor = makePredByNodeName('A');
  
          var isParaInline = function (node) {
              return isInline(node) && !!ancestor(node, isPara);
          };
  
          var isBodyInline = function (node) {
              return isInline(node) && !ancestor(node, isPara);
          };
  
          var isBody = makePredByNodeName('BODY');
  
          /**
           * returns whether nodeB is closest sibling of nodeA
           *
           * @system {Node} nodeA
           * @system {Node} nodeB
           * @return {Boolean}
           */
          var isClosestSibling = function (nodeA, nodeB) {
              return nodeA.nextSibling === nodeB ||
                  nodeA.previousSibling === nodeB;
          };
  
          /**
           * returns array of closest siblings with node
           *
           * @system {Node} node
           * @system {function} [pred] - predicate function
           * @return {Node[]}
           */
          var withClosestSiblings = function (node, pred) {
              pred = pred || func.ok;
  
              var siblings = [];
              if (node.previousSibling && pred(node.previousSibling)) {
                  siblings.push(node.previousSibling);
              }
              siblings.push(node);
              if (node.nextSibling && pred(node.nextSibling)) {
                  siblings.push(node.nextSibling);
              }
              return siblings;
          };
  
          /**
           * blank HTML for cursor position
           * - [workaround] old IE only works with &nbsp;
           * - [workaround] IE11 and other browser works with bogus br
           */
          var blankHTML = agent.isMSIE && agent.browserVersion < 11 ? '&nbsp;' : '<br>';
  
          /**
           * @method nodeLength
           *
           * returns #text's text size or element's childNodes size
           *
           * @system {Node} node
           */
          var nodeLength = function (node) {
              if (isText(node)) {
                  return node.nodeValue.length;
              }
  
              if (node) {
                  return node.childNodes.length;
              }
  
              return 0;
  
          };
  
          /**
           * returns whether node is empty or not.
           *
           * @system {Node} node
           * @return {Boolean}
           */
          var isEmpty = function (node) {
              var len = nodeLength(node);
  
              if (len === 0) {
                  return true;
              } else if (!isText(node) && len === 1 && node.innerHTML === blankHTML) {
                  // ex) <p><br></p>, <span><br></span>
                  return true;
              } else if (list.all(node.childNodes, isText) && node.innerHTML === '') {
                  // ex) <p></p>, <span></span>
                  return true;
              }
  
              return false;
          };
  
          /**
           * padding blankHTML if node is empty (for cursor position)
           */
          var paddingBlankHTML = function (node) {
              if (!isVoid(node) && !nodeLength(node)) {
                  node.innerHTML = blankHTML;
              }
          };
  
          /**
           * find nearest ancestor predicate hit
           *
           * @system {Node} node
           * @system {Function} pred - predicate function
           */
          var ancestor = function (node, pred) {
              while (node) {
                  if (pred(node)) {
                      return node;
                  }
                  if (isEditable(node)) {
                      break;
                  }
  
                  node = node.parentNode;
              }
              return null;
          };
  
          /**
           * find nearest ancestor only single child blood line and predicate hit
           *
           * @system {Node} node
           * @system {Function} pred - predicate function
           */
          var singleChildAncestor = function (node, pred) {
              node = node.parentNode;
  
              while (node) {
                  if (nodeLength(node) !== 1) {
                      break;
                  }
                  if (pred(node)) {
                      return node;
                  }
                  if (isEditable(node)) {
                      break;
                  }
  
                  node = node.parentNode;
              }
              return null;
          };
  
          /**
           * returns new array of ancestor nodes (until predicate hit).
           *
           * @system {Node} node
           * @system {Function} [optional] pred - predicate function
           */
          var listAncestor = function (node, pred) {
              pred = pred || func.fail;
  
              var ancestors = [];
              ancestor(node, function (el) {
                  if (!isEditable(el)) {
                      ancestors.push(el);
                  }
  
                  return pred(el);
              });
              return ancestors;
          };
  
          /**
           * find farthest ancestor predicate hit
           */
          var lastAncestor = function (node, pred) {
              var ancestors = listAncestor(node);
              return list.last(ancestors.filter(pred));
          };
  
          /**
           * returns common ancestor node between two nodes.
           *
           * @system {Node} nodeA
           * @system {Node} nodeB
           */
          var commonAncestor = function (nodeA, nodeB) {
              var ancestors = listAncestor(nodeA);
              for (var n = nodeB; n; n = n.parentNode) {
                  if ($.inArray(n, ancestors) > -1) {
                      return n;
                  }
              }
              return null; // difference document area
          };
  
          /**
           * listing all previous siblings (until predicate hit).
           *
           * @system {Node} node
           * @system {Function} [optional] pred - predicate function
           */
          var listPrev = function (node, pred) {
              pred = pred || func.fail;
  
              var nodes = [];
              while (node) {
                  if (pred(node)) {
                      break;
                  }
                  nodes.push(node);
                  node = node.previousSibling;
              }
              return nodes;
          };
  
          /**
           * listing next siblings (until predicate hit).
           *
           * @system {Node} node
           * @system {Function} [pred] - predicate function
           */
          var listNext = function (node, pred) {
              pred = pred || func.fail;
  
              var nodes = [];
              while (node) {
                  if (pred(node)) {
                      break;
                  }
                  nodes.push(node);
                  node = node.nextSibling;
              }
              return nodes;
          };
  
          /**
           * listing descendant nodes
           *
           * @system {Node} node
           * @system {Function} [pred] - predicate function
           */
          var listDescendant = function (node, pred) {
              var descendants = [];
              pred = pred || func.ok;
  
              // start DFS(depth first search) with node
              (function fnWalk(current) {
                  if (node !== current && pred(current)) {
                      descendants.push(current);
                  }
                  for (var idx = 0, len = current.childNodes.length; idx < len; idx++) {
                      fnWalk(current.childNodes[idx]);
                  }
              })(node);
  
              return descendants;
          };
  
          /**
           * wrap node with new tag.
           *
           * @system {Node} node
           * @system {Node} tagName of wrapper
           * @return {Node} - wrapper
           */
          var wrap = function (node, wrapperName) {
              var parent = node.parentNode;
              var wrapper = $('<' + wrapperName + '>')[0];
  
              parent.insertBefore(wrapper, node);
              wrapper.appendChild(node);
  
              return wrapper;
          };
  
          /**
           * insert node after preceding
           *
           * @system {Node} node
           * @system {Node} preceding - predicate function
           */
          var insertAfter = function (node, preceding) {
              var next = preceding.nextSibling, parent = preceding.parentNode;
              if (next) {
                  parent.insertBefore(node, next);
              } else {
                  parent.appendChild(node);
              }
              return node;
          };
  
          /**
           * append elements.
           *
           * @system {Node} node
           * @system {Collection} aChild
           */
          var appendChildNodes = function (node, aChild) {
              $.each(aChild, function (idx, child) {
                  node.appendChild(child);
              });
              return node;
          };
  
          /**
           * returns whether boundaryPoint is left edge or not.
           *
           * @system {BoundaryPoint} point
           * @return {Boolean}
           */
          var isLeftEdgePoint = function (point) {
              return point.offset === 0;
          };
  
          /**
           * returns whether boundaryPoint is right edge or not.
           *
           * @system {BoundaryPoint} point
           * @return {Boolean}
           */
          var isRightEdgePoint = function (point) {
              return point.offset === nodeLength(point.node);
          };
  
          /**
           * returns whether boundaryPoint is edge or not.
           *
           * @system {BoundaryPoint} point
           * @return {Boolean}
           */
          var isEdgePoint = function (point) {
              return isLeftEdgePoint(point) || isRightEdgePoint(point);
          };
  
          /**
           * returns whether node is left edge of ancestor or not.
           *
           * @system {Node} node
           * @system {Node} ancestor
           * @return {Boolean}
           */
          var isLeftEdgeOf = function (node, ancestor) {
              while (node && node !== ancestor) {
                  if (position(node) !== 0) {
                      return false;
                  }
                  node = node.parentNode;
              }
  
              return true;
          };
  
          /**
           * returns whether node is right edge of ancestor or not.
           *
           * @system {Node} node
           * @system {Node} ancestor
           * @return {Boolean}
           */
          var isRightEdgeOf = function (node, ancestor) {
              if (!ancestor) {
                  return false;
              }
              while (node && node !== ancestor) {
                  if (position(node) !== nodeLength(node.parentNode) - 1) {
                      return false;
                  }
                  node = node.parentNode;
              }
  
              return true;
          };
  
          /**
           * returns whether point is left edge of ancestor or not.
           * @system {BoundaryPoint} point
           * @system {Node} ancestor
           * @return {Boolean}
           */
          var isLeftEdgePointOf = function (point, ancestor) {
              return isLeftEdgePoint(point) && isLeftEdgeOf(point.node, ancestor);
          };
  
          /**
           * returns whether point is right edge of ancestor or not.
           * @system {BoundaryPoint} point
           * @system {Node} ancestor
           * @return {Boolean}
           */
          var isRightEdgePointOf = function (point, ancestor) {
              return isRightEdgePoint(point) && isRightEdgeOf(point.node, ancestor);
          };
  
          /**
           * returns offset from parent.
           *
           * @system {Node} node
           */
          var position = function (node) {
              var offset = 0;
              while ((node = node.previousSibling)) {
                  offset += 1;
              }
              return offset;
          };
  
          var hasChildren = function (node) {
              return !!(node && node.childNodes && node.childNodes.length);
          };
  
          /**
           * returns previous boundaryPoint
           *
           * @system {BoundaryPoint} point
           * @system {Boolean} isSkipInnerOffset
           * @return {BoundaryPoint}
           */
          var prevPoint = function (point, isSkipInnerOffset) {
              var node, offset;
  
              if (point.offset === 0) {
                  if (isEditable(point.node)) {
                      return null;
                  }
  
                  node = point.node.parentNode;
                  offset = position(point.node);
              } else if (hasChildren(point.node)) {
                  node = point.node.childNodes[point.offset - 1];
                  offset = nodeLength(node);
              } else {
                  node = point.node;
                  offset = isSkipInnerOffset ? 0 : point.offset - 1;
              }
  
              return {
                  node: node,
                  offset: offset
              };
          };
  
          /**
           * returns next boundaryPoint
           *
           * @system {BoundaryPoint} point
           * @system {Boolean} isSkipInnerOffset
           * @return {BoundaryPoint}
           */
          var nextPoint = function (point, isSkipInnerOffset) {
              var node, offset;
  
              if (nodeLength(point.node) === point.offset) {
                  if (isEditable(point.node)) {
                      return null;
                  }
  
                  node = point.node.parentNode;
                  offset = position(point.node) + 1;
              } else if (hasChildren(point.node)) {
                  node = point.node.childNodes[point.offset];
                  offset = 0;
              } else {
                  node = point.node;
                  offset = isSkipInnerOffset ? nodeLength(point.node) : point.offset + 1;
              }
  
              return {
                  node: node,
                  offset: offset
              };
          };
  
          /**
           * returns whether pointA and pointB is same or not.
           *
           * @system {BoundaryPoint} pointA
           * @system {BoundaryPoint} pointB
           * @return {Boolean}
           */
          var isSamePoint = function (pointA, pointB) {
              return pointA.node === pointB.node && pointA.offset === pointB.offset;
          };
  
          /**
           * returns whether point is visible (can set cursor) or not.
           *
           * @system {BoundaryPoint} point
           * @return {Boolean}
           */
          var isVisiblePoint = function (point) {
              if (isText(point.node) || !hasChildren(point.node) || isEmpty(point.node)) {
                  return true;
              }
  
              var leftNode = point.node.childNodes[point.offset - 1];
              var rightNode = point.node.childNodes[point.offset];
              if ((!leftNode || isVoid(leftNode)) && (!rightNode || isVoid(rightNode))) {
                  return true;
              }
  
              return false;
          };
  
          /**
           * @method prevPointUtil
           *
           * @system {BoundaryPoint} point
           * @system {Function} pred
           * @return {BoundaryPoint}
           */
          var prevPointUntil = function (point, pred) {
              while (point) {
                  if (pred(point)) {
                      return point;
                  }
  
                  point = prevPoint(point);
              }
  
              return null;
          };
  
          /**
           * @method nextPointUntil
           *
           * @system {BoundaryPoint} point
           * @system {Function} pred
           * @return {BoundaryPoint}
           */
          var nextPointUntil = function (point, pred) {
              while (point) {
                  if (pred(point)) {
                      return point;
                  }
  
                  point = nextPoint(point);
              }
  
              return null;
          };
  
          /**
           * returns whether point has character or not.
           *
           * @system {Point} point
           * @return {Boolean}
           */
          var isCharPoint = function (point) {
              if (!isText(point.node)) {
                  return false;
              }
  
              var ch = point.node.nodeValue.charAt(point.offset - 1);
              return ch && (ch !== ' ' && ch !== NBSP_CHAR);
          };
  
          /**
           * @method walkPoint
           *
           * @system {BoundaryPoint} startPoint
           * @system {BoundaryPoint} endPoint
           * @system {Function} handler
           * @system {Boolean} isSkipInnerOffset
           */
          var walkPoint = function (startPoint, endPoint, handler, isSkipInnerOffset) {
              var point = startPoint;
  
              while (point) {
                  handler(point);
  
                  if (isSamePoint(point, endPoint)) {
                      break;
                  }
  
                  var isSkipOffset = isSkipInnerOffset &&
                      startPoint.node !== point.node &&
                      endPoint.node !== point.node;
                  point = nextPoint(point, isSkipOffset);
              }
          };
  
          /**
           * @method makeOffsetPath
           *
           * return offsetPath(array of offset) from ancestor
           *
           * @system {Node} ancestor - ancestor node
           * @system {Node} node
           */
          var makeOffsetPath = function (ancestor, node) {
              var ancestors = listAncestor(node, func.eq(ancestor));
              return ancestors.map(position).reverse();
          };
  
          /**
           * @method fromOffsetPath
           *
           * return element from offsetPath(array of offset)
           *
           * @system {Node} ancestor - ancestor node
           * @system {array} offsets - offsetPath
           */
          var fromOffsetPath = function (ancestor, offsets) {
              var current = ancestor;
              for (var i = 0, len = offsets.length; i < len; i++) {
                  if (current.childNodes.length <= offsets[i]) {
                      current = current.childNodes[current.childNodes.length - 1];
                  } else {
                      current = current.childNodes[offsets[i]];
                  }
              }
              return current;
          };
  
          /**
           * @method splitNode
           *
           * split element or #text
           *
           * @system {BoundaryPoint} point
           * @system {Object} [options]
           * @system {Boolean} [options.isSkipPaddingBlankHTML] - default: false
           * @system {Boolean} [options.isNotSplitEdgePoint] - default: false
           * @return {Node} right node of boundaryPoint
           */
          var splitNode = function (point, options) {
              var isSkipPaddingBlankHTML = options && options.isSkipPaddingBlankHTML;
              var isNotSplitEdgePoint = options && options.isNotSplitEdgePoint;
  
              // edge case
              if (isEdgePoint(point) && (isText(point.node) || isNotSplitEdgePoint)) {
                  if (isLeftEdgePoint(point)) {
                      return point.node;
                  } else if (isRightEdgePoint(point)) {
                      return point.node.nextSibling;
                  }
              }
  
              // split #text
              if (isText(point.node)) {
                  return point.node.splitText(point.offset);
              } else {
                  var childNode = point.node.childNodes[point.offset];
                  var clone = insertAfter(point.node.cloneNode(false), point.node);
                  appendChildNodes(clone, listNext(childNode));
  
                  if (!isSkipPaddingBlankHTML) {
                      paddingBlankHTML(point.node);
                      paddingBlankHTML(clone);
                  }
  
                  return clone;
              }
          };
  
          /**
           * @method splitTree
           *
           * split tree by point
           *
           * @system {Node} root - split root
           * @system {BoundaryPoint} point
           * @system {Object} [options]
           * @system {Boolean} [options.isSkipPaddingBlankHTML] - default: false
           * @system {Boolean} [options.isNotSplitEdgePoint] - default: false
           * @return {Node} right node of boundaryPoint
           */
          var splitTree = function (root, point, options) {
              // ex) [#text, <span>, <p>]
              var ancestors = listAncestor(point.node, func.eq(root));
  
              if (!ancestors.length) {
                  return null;
              } else if (ancestors.length === 1) {
                  return splitNode(point, options);
              }
  
              return ancestors.reduce(function (node, parent) {
                  if (node === point.node) {
                      node = splitNode(point, options);
                  }
  
                  return splitNode({
                      node: parent,
                      offset: node ? dom.position(node) : nodeLength(parent)
                  }, options);
              });
          };
  
          /**
           * split point
           *
           * @system {Point} point
           * @system {Boolean} isInline
           * @return {Object}
           */
          var splitPoint = function (point, isInline) {
              // find splitRoot, container
              //  - inline: splitRoot is a child of paragraph
              //  - block: splitRoot is a child of bodyContainer
              var pred = isInline ? isPara : isBodyContainer;
              var ancestors = listAncestor(point.node, pred);
              var topAncestor = list.last(ancestors) || point.node;
  
              var splitRoot, container;
              if (pred(topAncestor)) {
                  splitRoot = ancestors[ancestors.length - 2];
                  container = topAncestor;
              } else {
                  splitRoot = topAncestor;
                  container = splitRoot.parentNode;
              }
  
              // if splitRoot is exists, split with splitTree
              var pivot = splitRoot && splitTree(splitRoot, point, {
                  isSkipPaddingBlankHTML: isInline,
                  isNotSplitEdgePoint: isInline
              });
  
              // if container is point.node, find pivot with point.offset
              if (!pivot && container === point.node) {
                  pivot = point.node.childNodes[point.offset];
              }
  
              return {
                  rightNode: pivot,
                  container: container
              };
          };
  
          var create = function (nodeName) {
              return document.createElement(nodeName);
          };
  
          var createText = function (text) {
              return document.createTextNode(text);
          };
  
          /**
           * @method remove
           *
           * remove node, (isRemoveChild: remove child or not)
           *
           * @system {Node} node
           * @system {Boolean} isRemoveChild
           */
          var remove = function (node, isRemoveChild) {
              if (!node || !node.parentNode) {
                  return;
              }
              if (node.removeNode) {
                  return node.removeNode(isRemoveChild);
              }
  
              var parent = node.parentNode;
              if (!isRemoveChild) {
                  var nodes = [];
                  var i, len;
                  for (i = 0, len = node.childNodes.length; i < len; i++) {
                      nodes.push(node.childNodes[i]);
                  }
  
                  for (i = 0, len = nodes.length; i < len; i++) {
                      parent.insertBefore(nodes[i], node);
                  }
              }
  
              parent.removeChild(node);
          };
  
          /**
           * @method removeWhile
           *
           * @system {Node} node
           * @system {Function} pred
           */
          var removeWhile = function (node, pred) {
              while (node) {
                  if (isEditable(node) || !pred(node)) {
                      break;
                  }
  
                  var parent = node.parentNode;
                  remove(node);
                  node = parent;
              }
          };
  
          /**
           * @method replace
           *
           * replace node with provided nodeName
           *
           * @system {Node} node
           * @system {String} nodeName
           * @return {Node} - new node
           */
          var replace = function (node, nodeName) {
              if (node.nodeName.toUpperCase() === nodeName.toUpperCase()) {
                  return node;
              }
  
              var newNode = create(nodeName);
  
              if (node.style.cssText) {
                  newNode.style.cssText = node.style.cssText;
              }
  
              appendChildNodes(newNode, list.from(node.childNodes));
              insertAfter(newNode, node);
              remove(node);
  
              return newNode;
          };
  
          var isTextarea = makePredByNodeName('TEXTAREA');
  
          /**
           * @system {jQuery} $node
           * @system {Boolean} [stripLinebreaks] - default: false
           */
          var value = function ($node, stripLinebreaks) {
              var val = isTextarea($node[0]) ? $node.val() : $node.html();
              if (stripLinebreaks) {
                  return val.replace(/[\n\r]/g, '');
              }
              return val;
          };
  
          /**
           * @method html
           *
           * get the HTML contents of node
           *
           * @system {jQuery} $node
           * @system {Boolean} [isNewlineOnBlock]
           */
          var html = function ($node, isNewlineOnBlock) {
              var markup = value($node);
  
              if (isNewlineOnBlock) {
                  var regexTag = /<(\/?)(\b(?!!)[^>\s]*)(.*?)(\s*\/?>)/g;
                  markup = markup.replace(regexTag, function (match, endSlash, name) {
                      name = name.toUpperCase();
                      var isEndOfInlineContainer = /^DIV|^TD|^TH|^P|^LI|^H[1-7]/.test(name) &&
                          !!endSlash;
                      var isBlockNode = /^BLOCKQUOTE|^TABLE|^TBODY|^TR|^HR|^UL|^OL/.test(name);
  
                      return match + ((isEndOfInlineContainer || isBlockNode) ? '\n' : '');
                  });
                  markup = $.trim(markup);
              }
  
              return markup;
          };
  
          var posFromPlaceholder = function (placeholder) {
              var $placeholder = $(placeholder);
              var pos = $placeholder.offset();
              var height = $placeholder.outerHeight(true); // include margin
  
              return {
                  left: pos.left,
                  top: pos.top + height
              };
          };
  
          var attachEvents = function ($node, events) {
              Object.keys(events).forEach(function (key) {
                  $node.on(key, events[key]);
              });
          };
  
          var detachEvents = function ($node, events) {
              Object.keys(events).forEach(function (key) {
                  $node.off(key, events[key]);
              });
          };
  
          /**
           * @method isCustomStyleTag
           *
           * assert if a node contains a "note-styletag" class,
           * which implies that's a custom-made style tag node
           *
           * @system {Node} an HTML DOM node
           */
          var isCustomStyleTag = function (node) {
              return node && !dom.isText(node) && list.contains(node.classList, 'note-styletag');
          };
  
          return {
              /** @property {String} NBSP_CHAR */
              NBSP_CHAR: NBSP_CHAR,
              /** @property {String} ZERO_WIDTH_NBSP_CHAR */
              ZERO_WIDTH_NBSP_CHAR: ZERO_WIDTH_NBSP_CHAR,
              /** @property {String} blank */
              blank: blankHTML,
              /** @property {String} emptyPara */
              emptyPara: '<p>' + blankHTML + '</p>',
              makePredByNodeName: makePredByNodeName,
              isEditable: isEditable,
              isControlSizing: isControlSizing,
              isText: isText,
              isElement: isElement,
              isVoid: isVoid,
              isPara: isPara,
              isPurePara: isPurePara,
              isHeading: isHeading,
              isInline: isInline,
              isBlock: func.not(isInline),
              isBodyInline: isBodyInline,
              isBody: isBody,
              isParaInline: isParaInline,
              isPre: isPre,
              isList: isList,
              isTable: isTable,
              isData: isData,
              isCell: isCell,
              isBlockquote: isBlockquote,
              isBodyContainer: isBodyContainer,
              isAnchor: isAnchor,
              isDiv: makePredByNodeName('DIV'),
              isLi: isLi,
              isBR: makePredByNodeName('BR'),
              isSpan: makePredByNodeName('SPAN'),
              isB: makePredByNodeName('B'),
              isU: makePredByNodeName('U'),
              isS: makePredByNodeName('S'),
              isI: makePredByNodeName('I'),
              isImg: makePredByNodeName('IMG'),
              isTextarea: isTextarea,
              isEmpty: isEmpty,
              isEmptyAnchor: func.and(isAnchor, isEmpty),
              isClosestSibling: isClosestSibling,
              withClosestSiblings: withClosestSiblings,
              nodeLength: nodeLength,
              isLeftEdgePoint: isLeftEdgePoint,
              isRightEdgePoint: isRightEdgePoint,
              isEdgePoint: isEdgePoint,
              isLeftEdgeOf: isLeftEdgeOf,
              isRightEdgeOf: isRightEdgeOf,
              isLeftEdgePointOf: isLeftEdgePointOf,
              isRightEdgePointOf: isRightEdgePointOf,
              prevPoint: prevPoint,
              nextPoint: nextPoint,
              isSamePoint: isSamePoint,
              isVisiblePoint: isVisiblePoint,
              prevPointUntil: prevPointUntil,
              nextPointUntil: nextPointUntil,
              isCharPoint: isCharPoint,
              walkPoint: walkPoint,
              ancestor: ancestor,
              singleChildAncestor: singleChildAncestor,
              listAncestor: listAncestor,
              lastAncestor: lastAncestor,
              listNext: listNext,
              listPrev: listPrev,
              listDescendant: listDescendant,
              commonAncestor: commonAncestor,
              wrap: wrap,
              insertAfter: insertAfter,
              appendChildNodes: appendChildNodes,
              position: position,
              hasChildren: hasChildren,
              makeOffsetPath: makeOffsetPath,
              fromOffsetPath: fromOffsetPath,
              splitTree: splitTree,
              splitPoint: splitPoint,
              create: create,
              createText: createText,
              remove: remove,
              removeWhile: removeWhile,
              replace: replace,
              html: html,
              value: value,
              posFromPlaceholder: posFromPlaceholder,
              attachEvents: attachEvents,
              detachEvents: detachEvents,
              isCustomStyleTag: isCustomStyleTag
          };
      })();
  
      /**
       * @system {jQuery} $note
       * @system {Object} options
       * @return {Context}
       */
      var Context = function ($note, options) {
          var self = this;
  
          var ui = $.summernote.ui;
          this.memos = {};
          this.modules = {};
          this.layoutInfo = {};
          this.options = options;
  
          /**
           * create layout and initialize modules and other resources
           */
          this.initialize = function () {
              this.layoutInfo = ui.createLayout($note, options);
              this._initialize();
              $note.hide();
              return this;
          };
  
          /**
           * destroy modules and other resources and remove layout
           */
          this.destroy = function () {
              this._destroy();
              $note.removeData('summernote');
              ui.removeLayout($note, this.layoutInfo);
          };
  
          /**
           * destory modules and other resources and initialize it again
           */
          this.reset = function () {
              var disabled = self.isDisabled();
              this.code(dom.emptyPara);
              this._destroy();
              this._initialize();
  
              if (disabled) {
                  self.disable();
              }
          };
  
          this._initialize = function () {
              // add optional buttons
              var buttons = $.extend({}, this.options.buttons);
              Object.keys(buttons).forEach(function (key) {
                  self.memo('button.' + key, buttons[key]);
              });
  
              var modules = $.extend({}, this.options.modules, $.summernote.plugins || {});
  
              // add and initialize modules
              Object.keys(modules).forEach(function (key) {
                  self.module(key, modules[key], true);
              });
  
              Object.keys(this.modules).forEach(function (key) {
                  self.initializeModule(key);
              });
          };
  
          this._destroy = function () {
              // destroy modules with reversed order
              Object.keys(this.modules).reverse().forEach(function (key) {
                  self.removeModule(key);
              });
  
              Object.keys(this.memos).forEach(function (key) {
                  self.removeMemo(key);
              });
              // trigger custom onDestroy callback
              this.triggerEvent('destroy', this);
          };
  
          this.code = function (html) {
              var isActivated = this.invoke('codeview.isActivated');
  
              if (html === undefined) {
                  this.invoke('codeview.sync');
                  return isActivated ? this.layoutInfo.codable.val() : this.layoutInfo.editable.html();
              } else {
                  if (isActivated) {
                      this.layoutInfo.codable.val(html);
                  } else {
                      this.layoutInfo.editable.html(html);
                  }
                  $note.val(html);
                  this.triggerEvent('change', html);
              }
          };
  
          this.isDisabled = function () {
              return this.layoutInfo.editable.attr('contenteditable') === 'false';
          };
  
          this.enable = function () {
              this.layoutInfo.editable.attr('contenteditable', true);
              this.invoke('toolbar.activate', true);
              this.triggerEvent('disable', false);
          };
  
          this.disable = function () {
              // close codeview if codeview is opend
              if (this.invoke('codeview.isActivated')) {
                  this.invoke('codeview.deactivate');
              }
              this.layoutInfo.editable.attr('contenteditable', false);
              this.invoke('toolbar.deactivate', true);
  
              this.triggerEvent('disable', true);
          };
  
          this.triggerEvent = function () {
              var namespace = list.head(arguments);
              var args = list.tail(list.from(arguments));
  
              var callback = this.options.callbacks[func.namespaceToCamel(namespace, 'on')];
              if (callback) {
                  callback.apply($note[0], args);
              }
              $note.trigger('summernote.' + namespace, args);
          };
  
          this.initializeModule = function (key) {
              var module = this.modules[key];
              module.shouldInitialize = module.shouldInitialize || func.ok;
              if (!module.shouldInitialize()) {
                  return;
              }
  
              // initialize module
              if (module.initialize) {
                  module.initialize();
              }
  
              // attach events
              if (module.events) {
                  dom.attachEvents($note, module.events);
              }
          };
  
          this.module = function (key, ModuleClass, withoutIntialize) {
              if (arguments.length === 1) {
                  return this.modules[key];
              }
  
              this.modules[key] = new ModuleClass(this);
  
              if (!withoutIntialize) {
                  this.initializeModule(key);
              }
          };
  
          this.removeModule = function (key) {
              var module = this.modules[key];
              if (module.shouldInitialize()) {
                  if (module.events) {
                      dom.detachEvents($note, module.events);
                  }
  
                  if (module.destroy) {
                      module.destroy();
                  }
              }
  
              delete this.modules[key];
          };
  
          this.memo = function (key, obj) {
              if (arguments.length === 1) {
                  return this.memos[key];
              }
              this.memos[key] = obj;
          };
  
          this.removeMemo = function (key) {
              if (this.memos[key] && this.memos[key].destroy) {
                  this.memos[key].destroy();
              }
  
              delete this.memos[key];
          };
  
          /**
           *Some buttons need to change their visual style immediately once they get pressed
           */
          this.createInvokeHandlerAndUpdateState = function (namespace, value) {
              return function (event) {
                  self.createInvokeHandler(namespace, value)(event);
                  self.invoke('buttons.updateCurrentStyle');
              };
          };
  
          this.createInvokeHandler = function (namespace, value) {
              return function (event) {
                  event.preventDefault();
                  var $target = $(event.target);
                  self.invoke(namespace, value || $target.closest('[data-value]').data('value'), $target);
              };
          };
  
          this.invoke = function () {
              var namespace = list.head(arguments);
              var args = list.tail(list.from(arguments));
  
              var splits = namespace.split('.');
              var hasSeparator = splits.length > 1;
              var moduleName = hasSeparator && list.head(splits);
              var methodName = hasSeparator ? list.last(splits) : list.head(splits);
  
              var module = this.modules[moduleName || 'editor'];
              if (!moduleName && this[methodName]) {
                  return this[methodName].apply(this, args);
              } else if (module && module[methodName] && module.shouldInitialize()) {
                  return module[methodName].apply(module, args);
              }
          };
  
          return this.initialize();
      };
  
      $.fn.extend({
          /**
           * Summernote API
           *
           * @system {Object|String}
           * @return {this}
           */
          summernote: function () {
              var type = $.type(list.head(arguments));
              var isExternalAPICalled = type === 'string';
              var hasInitOptions = type === 'object';
  
              var options = hasInitOptions ? list.head(arguments) : {};
  
              options = $.extend({}, $.summernote.options, options);
  
              // Update options
              options.langInfo = $.extend(true, {}, $.summernote.lang['en-US'], $.summernote.lang[options.lang]);
              options.icons = $.extend(true, {}, $.summernote.options.icons, options.icons);
              options.tooltip = options.tooltip === 'auto' ? !agent.isSupportTouch : options.tooltip;
  
              this.each(function (idx, note) {
                  var $note = $(note);
                  if (!$note.data('summernote')) {
                      var context = new Context($note, options);
                      $note.data('summernote', context);
                      $note.data('summernote').triggerEvent('init', context.layoutInfo);
                  }
              });
  
              var $note = this.first();
              if ($note.length) {
                  var context = $note.data('summernote');
                  if (isExternalAPICalled) {
                      return context.invoke.apply(context, list.from(arguments));
                  } else if (options.focus) {
                      context.invoke('editor.focus');
                  }
              }
  
              return this;
          }
      });
  
  
      var Renderer = function (markup, children, options, callback) {
          this.render = function ($parent) {
              var $node = $(markup);
  
              if (options && options.contents) {
                  $node.html(options.contents);
              }
  
              if (options && options.className) {
                  $node.addClass(options.className);
              }
  
              if (options && options.data) {
                  $.each(options.data, function (k, v) {
                      $node.attr('data-' + k, v);
                  });
              }
  
              if (options && options.click) {
                  $node.on('click', options.click);
              }
  
              if (children) {
                  var $container = $node.find('.note-children-container');
                  children.forEach(function (child) {
                      child.render($container.length ? $container : $node);
                  });
              }
  
              if (callback) {
                  callback($node, options);
              }
  
              if (options && options.callback) {
                  options.callback($node);
              }
  
              if ($parent) {
                  $parent.append($node);
              }
  
              return $node;
          };
      };
  
      var renderer = {
          create: function (markup, callback) {
              return function () {
                  var children = $.isArray(arguments[0]) ? arguments[0] : [];
                  var options = typeof arguments[1] === 'object' ? arguments[1] : arguments[0];
                  if (options && options.children) {
                      children = options.children;
                  }
                  return new Renderer(markup, children, options, callback);
              };
          }
      };
  
      var editor = renderer.create('<div class="note-editor note-frame panel panel-default"/>');
      var toolbar = renderer.create('<div class="note-toolbar panel-heading"/>');
      var editingArea = renderer.create('<div class="note-editing-area"/>');
      var codable = renderer.create('<textarea class="note-codable"/>');
      var editable = renderer.create('<div class="note-editable panel-body" contentEditable="true"/>');
      var statusbar = renderer.create([
          '<div class="note-statusbar">',
          '  <div class="note-resizebar">',
          '    <div class="note-icon-bar"/>',
          '    <div class="note-icon-bar"/>',
          '    <div class="note-icon-bar"/>',
          '  </div>',
          '</div>'
      ].join(''));
  
      var airEditor = renderer.create('<div class="note-editor"/>');
      var airEditable = renderer.create('<div class="note-editable" contentEditable="true"/>');
  
      var buttonGroup = renderer.create('<div class="note-btn-group btn-group">');
  
      var dropdown = renderer.create('<div class="dropdown-menu">', function ($node, options) {
          var markup = $.isArray(options.items) ? options.items.map(function (item) {
              var value = (typeof item === 'string') ? item : (item.value || '');
              var content = options.template ? options.template(item) : item;
              var option = (typeof item === 'object') ? item.option : undefined;
  
              var dataValue = 'data-value="' + value + '"';
              var dataOption = (option !== undefined) ? ' data-option="' + option + '"' : '';
              return '<li><a href="#" ' + (dataValue + dataOption) + '>' + content + '</a></li>';
          }).join('') : options.items;
  
          $node.html(markup);
      });
  
      var dropdownButtonContents = function (contents, options) {
          return contents + ' ' + icon(options.icons.caret, 'span');
      };
  
      var dropdownCheck = renderer.create('<div class="dropdown-menu note-check">', function ($node, options) {
          var markup = $.isArray(options.items) ? options.items.map(function (item) {
              var value = (typeof item === 'string') ? item : (item.value || '');
              var content = options.template ? options.template(item) : item;
              return '<li><a href="#" data-value="' + value + '">' + icon(options.checkClassName) + ' ' + content + '</a></li>';
          }).join('') : options.items;
          $node.html(markup);
      });
  
      var palette = renderer.create('<div class="note-color-palette"/>', function ($node, options) {
          var contents = [];
          for (var row = 0, rowSize = options.colors.length; row < rowSize; row++) {
              var eventName = options.eventName;
              var colors = options.colors[row];
              var buttons = [];
              for (var col = 0, colSize = colors.length; col < colSize; col++) {
                  var color = colors[col];
                  buttons.push([
                      '<button type="button" class="note-color-btn"',
                      'style="background-color:', color, '" ',
                      'data-event="', eventName, '" ',
                      'data-value="', color, '" ',
                      'title="', color, '" ',
                      'data-toggle="button" tabindex="-1"></button>'
                  ].join(''));
              }
              contents.push('<div class="note-color-row">' + buttons.join('') + '</div>');
          }
          $node.html(contents.join(''));
  
          if (options.tooltip) {
              $node.find('.note-color-btn').tooltip({
                  container: 'body',
                  trigger: 'hover',
                  placement: 'bottom'
              });
          }
      });
  
      var dialog = renderer.create('<div class="modal" aria-hidden="false" tabindex="-1"/>', function ($node, options) {
          if (options.fade) {
              $node.addClass('fade');
          }
          $node.html([
              '<div class="modal-dialog">',
              '  <div class="modal-content">',
              (options.title ?
                      '    <div class="modal-header">' +
                      '      <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>' +
                      '      <h4 class="modal-title">' + options.title + '</h4>' +
                      '    </div>' : ''
              ),
              '    <div class="modal-body">' + options.body + '</div>',
              (options.footer ?
                      '    <div class="modal-footer">' + options.footer + '</div>' : ''
              ),
              '  </div>',
              '</div>'
          ].join(''));
      });
  
      var popover = renderer.create([
          '<div class="note-popover popover in">',
          '  <div class="arrow"/>',
          '  <div class="popover-content note-children-container"/>',
          '</div>'
      ].join(''), function ($node, options) {
          var direction = typeof options.direction !== 'undefined' ? options.direction : 'bottom';
  
          $node.addClass(direction);
  
          if (options.hideArrow) {
              $node.find('.arrow').hide();
          }
      });
  
      var checkbox = renderer.create('<div class="checkbox"></div>', function ($node, options) {
          $node.html([
              ' <label' + (options.id ? ' for="' + options.id + '"' : '') + '>',
              ' <input type="checkbox"' + (options.id ? ' id="' + options.id + '"' : ''),
              (options.checked ? ' checked' : '') + '/>',
              (options.text ? options.text : ''),
              '</label>'
          ].join(''));
      });
  
      var icon = function (iconClassName, tagName) {
          tagName = tagName || 'i';
          return '<' + tagName + ' class="' + iconClassName + '"/>';
      };
  
      var ui = {
          editor: editor,
          toolbar: toolbar,
          editingArea: editingArea,
          codable: codable,
          editable: editable,
          statusbar: statusbar,
          airEditor: airEditor,
          airEditable: airEditable,
          buttonGroup: buttonGroup,
          dropdown: dropdown,
          dropdownButtonContents: dropdownButtonContents,
          dropdownCheck: dropdownCheck,
          palette: palette,
          dialog: dialog,
          popover: popover,
          checkbox: checkbox,
          icon: icon,
          options: {},
  
          button: function ($node, options) {
              return renderer.create('<button type="button" class="note-btn btn btn-default btn-sm" tabindex="-1">', function ($node, options) {
                  if (options && options.tooltip && self.options.tooltip) {
                      $node.attr({
                          title: options.tooltip
                      }).tooltip({
                          container: 'body',
                          trigger: 'hover',
                          placement: 'bottom'
                      });
                  }
              })($node, options);
          },
  
          toggleBtn: function ($btn, isEnable) {
              $btn.toggleClass('disabled', !isEnable);
              $btn.attr('disabled', !isEnable);
          },
  
          toggleBtnActive: function ($btn, isActive) {
              $btn.toggleClass('active', isActive);
          },
  
          onDialogShown: function ($dialog, handler) {
              $dialog.one('shown.bs.modal', handler);
          },
  
          onDialogHidden: function ($dialog, handler) {
              $dialog.one('hidden.bs.modal', handler);
          },
  
          showDialog: function ($dialog) {
              $dialog.modal('show');
          },
  
          hideDialog: function ($dialog) {
              $dialog.modal('hide');
          },
  
          createLayout: function ($note, options) {
              self.options = options;
              var $editor = (options.airMode ? ui.airEditor([
                  ui.editingArea([
                      ui.airEditable()
                  ])
              ]) : ui.editor([
                  ui.toolbar(),
                  ui.editingArea([
                      ui.codable(),
                      ui.editable()
                  ]),
                  ui.statusbar()
              ])).render();
  
              $editor.insertAfter($note);
  
              return {
                  note: $note,
                  editor: $editor,
                  toolbar: $editor.find('.note-toolbar'),
                  editingArea: $editor.find('.note-editing-area'),
                  editable: $editor.find('.note-editable'),
                  codable: $editor.find('.note-codable'),
                  statusbar: $editor.find('.note-statusbar')
              };
          },
  
          removeLayout: function ($note, layoutInfo) {
              $note.html(layoutInfo.editable.html());
              layoutInfo.editor.remove();
              $note.show();
          }
      };
  
      $.summernote = $.summernote || {
          lang: {}
      };
  
      $.extend($.summernote.lang, {
          'en-US': {
              font: {
                  bold: 'Bold',
                  italic: 'Italic',
                  underline: 'Underline',
                  clear: 'Remove Font Style',
                  height: 'Line Height',
                  name: 'Font Family',
                  strikethrough: 'Strikethrough',
                  subscript: 'Subscript',
                  superscript: 'Superscript',
                  size: 'Font Size'
              },
              image: {
                  image: 'Picture',
                  insert: 'Insert Image',
                  resizeFull: 'Resize Full',
                  resizeHalf: 'Resize Half',
                  resizeQuarter: 'Resize Quarter',
                  floatLeft: 'Float Left',
                  floatRight: 'Float Right',
                  floatNone: 'Float None',
                  shapeRounded: 'Shape: Rounded',
                  shapeCircle: 'Shape: Circle',
                  shapeThumbnail: 'Shape: Thumbnail',
                  shapeNone: 'Shape: None',
                  dragImageHere: 'Drag image or text here',
                  dropImage: 'Drop image or Text',
                  selectFromFiles: 'Select from files',
                  maximumFileSize: 'Maximum file size',
                  maximumFileSizeError: 'Maximum file size exceeded.',
                  url: 'Image URL',
                  remove: 'Remove Image'
              },
              video: {
                  video: 'Video',
                  videoLink: 'Video Link',
                  insert: 'Insert Video',
                  url: 'Video URL?',
                  providers: '(YouTube, Vimeo, Vine, Instagram, DailyMotion or Youku)'
              },
              link: {
                  link: 'Link',
                  insert: 'Insert Link',
                  unlink: 'Unlink',
                  edit: 'Edit',
                  textToDisplay: 'Text to display',
                  url: 'To what URL should this link go?',
                  openInNewWindow: 'Open in new window'
              },
              table: {
                  table: 'Table',
                  addRowAbove: 'Add row above',
                  addRowBelow: 'Add row below',
                  addColLeft: 'Add column left',
                  addColRight: 'Add column right',
                  delRow: 'Delete row',
                  delCol: 'Delete column',
                  delTable: 'Delete table'
              },
              hr: {
                  insert: 'Insert Horizontal Rule'
              },
              style: {
                  style: 'Style',
                  p: 'Normal',
                  blockquote: 'Quote',
                  pre: 'Code',
                  h1: 'Header 1',
                  h2: 'Header 2',
                  h3: 'Header 3',
                  h4: 'Header 4',
                  h5: 'Header 5',
                  h6: 'Header 6'
              },
              lists: {
                  unordered: 'Unordered list',
                  ordered: 'Ordered list'
              },
              options: {
                  help: 'Help',
                  fullscreen: 'Full Screen',
                  codeview: 'Code View'
              },
              paragraph: {
                  paragraph: 'Paragraph',
                  outdent: 'Outdent',
                  indent: 'Indent',
                  left: 'Align left',
                  center: 'Align center',
                  right: 'Align right',
                  justify: 'Justify full'
              },
              color: {
                  recent: 'Recent Color',
                  more: 'More Color',
                  background: 'Background Color',
                  foreground: 'Foreground Color',
                  transparent: 'Transparent',
                  setTransparent: 'Set transparent',
                  reset: 'Reset',
                  resetToDefault: 'Reset to default'
              },
              shortcut: {
                  shortcuts: 'Keyboard shortcuts',
                  close: 'Close',
                  textFormatting: 'Text formatting',
                  action: 'Action',
                  paragraphFormatting: 'Paragraph formatting',
                  documentStyle: 'Document Style',
                  extraKeys: 'Extra keys'
              },
              help: {
                  'insertParagraph': 'Insert Paragraph',
                  'undo': 'Undoes the last command',
                  'redo': 'Redoes the last command',
                  'tab': 'Tab',
                  'untab': 'Untab',
                  'bold': 'Set a bold style',
                  'italic': 'Set a italic style',
                  'underline': 'Set a underline style',
                  'strikethrough': 'Set a strikethrough style',
                  'removeFormat': 'Clean a style',
                  'justifyLeft': 'Set left align',
                  'justifyCenter': 'Set center align',
                  'justifyRight': 'Set right align',
                  'justifyFull': 'Set full align',
                  'insertUnorderedList': 'Toggle unordered list',
                  'insertOrderedList': 'Toggle ordered list',
                  'outdent': 'Outdent on current paragraph',
                  'indent': 'Indent on current paragraph',
                  'formatPara': 'Change current block\'s format as a paragraph(P tag)',
                  'formatH1': 'Change current block\'s format as H1',
                  'formatH2': 'Change current block\'s format as H2',
                  'formatH3': 'Change current block\'s format as H3',
                  'formatH4': 'Change current block\'s format as H4',
                  'formatH5': 'Change current block\'s format as H5',
                  'formatH6': 'Change current block\'s format as H6',
                  'insertHorizontalRule': 'Insert horizontal rule',
                  'linkDialog.show': 'Show Link Dialog'
              },
              history: {
                  undo: 'Undo',
                  redo: 'Redo'
              },
              specialChar: {
                  specialChar: 'SPECIAL CHARACTERS',
                  select: 'Select Special characters'
              }
          }
      });
  
  
      /**
       * @class core.key
       *
       * Object for keycodes.
       *
       * @singleton
       * @alternateClassName key
       */
      var key = (function () {
          var keyMap = {
              'BACKSPACE': 8,
              'TAB': 9,
              'ENTER': 13,
              'SPACE': 32,
              'DELETE': 46,
  
              // Arrow
              'LEFT': 37,
              'UP': 38,
              'RIGHT': 39,
              'DOWN': 40,
  
              // Number: 0-9
              'NUM0': 48,
              'NUM1': 49,
              'NUM2': 50,
              'NUM3': 51,
              'NUM4': 52,
              'NUM5': 53,
              'NUM6': 54,
              'NUM7': 55,
              'NUM8': 56,
  
              // Alphabet: a-z
              'B': 66,
              'E': 69,
              'I': 73,
              'J': 74,
              'K': 75,
              'L': 76,
              'R': 82,
              'S': 83,
              'U': 85,
              'V': 86,
              'Y': 89,
              'Z': 90,
  
              'SLASH': 191,
              'LEFTBRACKET': 219,
              'BACKSLASH': 220,
              'RIGHTBRACKET': 221
          };
  
          return {
              /**
               * @method isEdit
               *
               * @system {Number} keyCode
               * @return {Boolean}
               */
              isEdit: function (keyCode) {
                  return list.contains([
                      keyMap.BACKSPACE,
                      keyMap.TAB,
                      keyMap.ENTER,
                      keyMap.SPACE,
                      keyMap.DELETE
                  ], keyCode);
              },
              /**
               * @method isMove
               *
               * @system {Number} keyCode
               * @return {Boolean}
               */
              isMove: function (keyCode) {
                  return list.contains([
                      keyMap.LEFT,
                      keyMap.UP,
                      keyMap.RIGHT,
                      keyMap.DOWN
                  ], keyCode);
              },
              /**
               * @property {Object} nameFromCode
               * @property {String} nameFromCode.8 "BACKSPACE"
               */
              nameFromCode: func.invertObject(keyMap),
              code: keyMap
          };
      })();
  
      var range = (function () {
  
          /**
           * return boundaryPoint from TextRange, inspired by Andy Na's HuskyRange.js
           *
           * @system {TextRange} textRange
           * @system {Boolean} isStart
           * @return {BoundaryPoint}
           *
           * @see http://msdn.microsoft.com/en-us/library/ie/ms535872(v=vs.85).aspx
           */
          var textRangeToPoint = function (textRange, isStart) {
              var container = textRange.parentElement(), offset;
  
              var tester = document.body.createTextRange(), prevContainer;
              var childNodes = list.from(container.childNodes);
              for (offset = 0; offset < childNodes.length; offset++) {
                  if (dom.isText(childNodes[offset])) {
                      continue;
                  }
                  tester.moveToElementText(childNodes[offset]);
                  if (tester.compareEndPoints('StartToStart', textRange) >= 0) {
                      break;
                  }
                  prevContainer = childNodes[offset];
              }
  
              if (offset !== 0 && dom.isText(childNodes[offset - 1])) {
                  var textRangeStart = document.body.createTextRange(), curTextNode = null;
                  textRangeStart.moveToElementText(prevContainer || container);
                  textRangeStart.collapse(!prevContainer);
                  curTextNode = prevContainer ? prevContainer.nextSibling : container.firstChild;
  
                  var pointTester = textRange.duplicate();
                  pointTester.setEndPoint('StartToStart', textRangeStart);
                  var textCount = pointTester.text.replace(/[\r\n]/g, '').length;
  
                  while (textCount > curTextNode.nodeValue.length && curTextNode.nextSibling) {
                      textCount -= curTextNode.nodeValue.length;
                      curTextNode = curTextNode.nextSibling;
                  }
  
                  /* jshint ignore:start */
                  var dummy = curTextNode.nodeValue; // enforce IE to re-reference curTextNode, hack
                  /* jshint ignore:end */
  
                  if (isStart && curTextNode.nextSibling && dom.isText(curTextNode.nextSibling) &&
                      textCount === curTextNode.nodeValue.length) {
                      textCount -= curTextNode.nodeValue.length;
                      curTextNode = curTextNode.nextSibling;
                  }
  
                  container = curTextNode;
                  offset = textCount;
              }
  
              return {
                  cont: container,
                  offset: offset
              };
          };
  
          /**
           * return TextRange from boundary point (inspired by google closure-library)
           * @system {BoundaryPoint} point
           * @return {TextRange}
           */
          var pointToTextRange = function (point) {
              var textRangeInfo = function (container, offset) {
                  var node, isCollapseToStart;
  
                  if (dom.isText(container)) {
                      var prevTextNodes = dom.listPrev(container, func.not(dom.isText));
                      var prevContainer = list.last(prevTextNodes).previousSibling;
                      node = prevContainer || container.parentNode;
                      offset += list.sum(list.tail(prevTextNodes), dom.nodeLength);
                      isCollapseToStart = !prevContainer;
                  } else {
                      node = container.childNodes[offset] || container;
                      if (dom.isText(node)) {
                          return textRangeInfo(node, 0);
                      }
  
                      offset = 0;
                      isCollapseToStart = false;
                  }
  
                  return {
                      node: node,
                      collapseToStart: isCollapseToStart,
                      offset: offset
                  };
              };
  
              var textRange = document.body.createTextRange();
              var info = textRangeInfo(point.node, point.offset);
  
              textRange.moveToElementText(info.node);
              textRange.collapse(info.collapseToStart);
              textRange.moveStart('character', info.offset);
              return textRange;
          };
  
          /**
           * Wrapped Range
           *
           * @constructor
           * @system {Node} sc - start container
           * @system {Number} so - start offset
           * @system {Node} ec - end container
           * @system {Number} eo - end offset
           */
          var WrappedRange = function (sc, so, ec, eo) {
              this.sc = sc;
              this.so = so;
              this.ec = ec;
              this.eo = eo;
  
              // nativeRange: get nativeRange from sc, so, ec, eo
              var nativeRange = function () {
                  if (agent.isW3CRangeSupport) {
                      var w3cRange = document.createRange();
                      w3cRange.setStart(sc, so);
                      w3cRange.setEnd(ec, eo);
  
                      return w3cRange;
                  } else {
                      var textRange = pointToTextRange({
                          node: sc,
                          offset: so
                      });
  
                      textRange.setEndPoint('EndToEnd', pointToTextRange({
                          node: ec,
                          offset: eo
                      }));
  
                      return textRange;
                  }
              };
  
              this.getPoints = function () {
                  return {
                      sc: sc,
                      so: so,
                      ec: ec,
                      eo: eo
                  };
              };
  
              this.getStartPoint = function () {
                  return {
                      node: sc,
                      offset: so
                  };
              };
  
              this.getEndPoint = function () {
                  return {
                      node: ec,
                      offset: eo
                  };
              };
  
              /**
               * select update visible range
               */
              this.select = function () {
                  var nativeRng = nativeRange();
                  if (agent.isW3CRangeSupport) {
                      var selection = document.getSelection();
                      if (selection.rangeCount > 0) {
                          selection.removeAllRanges();
                      }
                      selection.addRange(nativeRng);
                  } else {
                      nativeRng.select();
                  }
  
                  return this;
              };
  
              /**
               * Moves the scrollbar to start container(sc) of current range
               *
               * @return {WrappedRange}
               */
              this.scrollIntoView = function (container) {
                  var height = $(container).height();
                  if (container.scrollTop + height < this.sc.offsetTop) {
                      container.scrollTop += Math.abs(container.scrollTop + height - this.sc.offsetTop);
                  }
  
                  return this;
              };
  
              /**
               * @return {WrappedRange}
               */
              this.normalize = function () {
  
                  /**
                   * @system {BoundaryPoint} point
                   * @system {Boolean} isLeftToRight
                   * @return {BoundaryPoint}
                   */
                  var getVisiblePoint = function (point, isLeftToRight) {
                      if ((dom.isVisiblePoint(point) && !dom.isEdgePoint(point)) ||
                          (dom.isVisiblePoint(point) && dom.isRightEdgePoint(point) && !isLeftToRight) ||
                          (dom.isVisiblePoint(point) && dom.isLeftEdgePoint(point) && isLeftToRight) ||
                          (dom.isVisiblePoint(point) && dom.isBlock(point.node) && dom.isEmpty(point.node))) {
                          return point;
                      }
  
                      // point on block's edge
                      var block = dom.ancestor(point.node, dom.isBlock);
                      if (((dom.isLeftEdgePointOf(point, block) || dom.isVoid(dom.prevPoint(point).node)) && !isLeftToRight) ||
                          ((dom.isRightEdgePointOf(point, block) || dom.isVoid(dom.nextPoint(point).node)) && isLeftToRight)) {
  
                          // returns point already on visible point
                          if (dom.isVisiblePoint(point)) {
                              return point;
                          }
                          // reverse direction 
                          isLeftToRight = !isLeftToRight;
                      }
  
                      var nextPoint = isLeftToRight ? dom.nextPointUntil(dom.nextPoint(point), dom.isVisiblePoint) :
                          dom.prevPointUntil(dom.prevPoint(point), dom.isVisiblePoint);
                      return nextPoint || point;
                  };
  
                  var endPoint = getVisiblePoint(this.getEndPoint(), false);
                  var startPoint = this.isCollapsed() ? endPoint : getVisiblePoint(this.getStartPoint(), true);
  
                  return new WrappedRange(
                      startPoint.node,
                      startPoint.offset,
                      endPoint.node,
                      endPoint.offset
                  );
              };
  
              /**
               * returns matched nodes on range
               *
               * @system {Function} [pred] - predicate function
               * @system {Object} [options]
               * @system {Boolean} [options.includeAncestor]
               * @system {Boolean} [options.fullyContains]
               * @return {Node[]}
               */
              this.nodes = function (pred, options) {
                  pred = pred || func.ok;
  
                  var includeAncestor = options && options.includeAncestor;
                  var fullyContains = options && options.fullyContains;
  
                  // TODO compare points and sort
                  var startPoint = this.getStartPoint();
                  var endPoint = this.getEndPoint();
  
                  var nodes = [];
                  var leftEdgeNodes = [];
  
                  dom.walkPoint(startPoint, endPoint, function (point) {
                      if (dom.isEditable(point.node)) {
                          return;
                      }
  
                      var node;
                      if (fullyContains) {
                          if (dom.isLeftEdgePoint(point)) {
                              leftEdgeNodes.push(point.node);
                          }
                          if (dom.isRightEdgePoint(point) && list.contains(leftEdgeNodes, point.node)) {
                              node = point.node;
                          }
                      } else if (includeAncestor) {
                          node = dom.ancestor(point.node, pred);
                      } else {
                          node = point.node;
                      }
  
                      if (node && pred(node)) {
                          nodes.push(node);
                      }
                  }, true);
  
                  return list.unique(nodes);
              };
  
              /**
               * returns commonAncestor of range
               * @return {Element} - commonAncestor
               */
              this.commonAncestor = function () {
                  return dom.commonAncestor(sc, ec);
              };
  
              /**
               * returns expanded range by pred
               *
               * @system {Function} pred - predicate function
               * @return {WrappedRange}
               */
              this.expand = function (pred) {
                  var startAncestor = dom.ancestor(sc, pred);
                  var endAncestor = dom.ancestor(ec, pred);
  
                  if (!startAncestor && !endAncestor) {
                      return new WrappedRange(sc, so, ec, eo);
                  }
  
                  var boundaryPoints = this.getPoints();
  
                  if (startAncestor) {
                      boundaryPoints.sc = startAncestor;
                      boundaryPoints.so = 0;
                  }
  
                  if (endAncestor) {
                      boundaryPoints.ec = endAncestor;
                      boundaryPoints.eo = dom.nodeLength(endAncestor);
                  }
  
                  return new WrappedRange(
                      boundaryPoints.sc,
                      boundaryPoints.so,
                      boundaryPoints.ec,
                      boundaryPoints.eo
                  );
              };
  
              /**
               * @system {Boolean} isCollapseToStart
               * @return {WrappedRange}
               */
              this.collapse = function (isCollapseToStart) {
                  if (isCollapseToStart) {
                      return new WrappedRange(sc, so, sc, so);
                  } else {
                      return new WrappedRange(ec, eo, ec, eo);
                  }
              };
  
              /**
               * splitText on range
               */
              this.splitText = function () {
                  var isSameContainer = sc === ec;
                  var boundaryPoints = this.getPoints();
  
                  if (dom.isText(ec) && !dom.isEdgePoint(this.getEndPoint())) {
                      ec.splitText(eo);
                  }
  
                  if (dom.isText(sc) && !dom.isEdgePoint(this.getStartPoint())) {
                      boundaryPoints.sc = sc.splitText(so);
                      boundaryPoints.so = 0;
  
                      if (isSameContainer) {
                          boundaryPoints.ec = boundaryPoints.sc;
                          boundaryPoints.eo = eo - so;
                      }
                  }
  
                  return new WrappedRange(
                      boundaryPoints.sc,
                      boundaryPoints.so,
                      boundaryPoints.ec,
                      boundaryPoints.eo
                  );
              };
  
              /**
               * delete contents on range
               * @return {WrappedRange}
               */
              this.deleteContents = function () {
                  if (this.isCollapsed()) {
                      return this;
                  }
  
                  var rng = this.splitText();
                  var nodes = rng.nodes(null, {
                      fullyContains: true
                  });
  
                  // find new cursor point
                  var point = dom.prevPointUntil(rng.getStartPoint(), function (point) {
                      return !list.contains(nodes, point.node);
                  });
  
                  var emptyParents = [];
                  $.each(nodes, function (idx, node) {
                      // find empty parents
                      var parent = node.parentNode;
                      if (point.node !== parent && dom.nodeLength(parent) === 1) {
                          emptyParents.push(parent);
                      }
                      dom.remove(node, false);
                  });
  
                  // remove empty parents
                  $.each(emptyParents, function (idx, node) {
                      dom.remove(node, false);
                  });
  
                  return new WrappedRange(
                      point.node,
                      point.offset,
                      point.node,
                      point.offset
                  ).normalize();
              };
  
              /**
               * makeIsOn: return isOn(pred) function
               */
              var makeIsOn = function (pred) {
                  return function () {
                      var ancestor = dom.ancestor(sc, pred);
                      return !!ancestor && (ancestor === dom.ancestor(ec, pred));
                  };
              };
  
              // isOnEditable: judge whether range is on editable or not
              this.isOnEditable = makeIsOn(dom.isEditable);
              // isOnList: judge whether range is on list node or not
              this.isOnList = makeIsOn(dom.isList);
              // isOnAnchor: judge whether range is on anchor node or not
              this.isOnAnchor = makeIsOn(dom.isAnchor);
              // isOnCell: judge whether range is on cell node or not
              this.isOnCell = makeIsOn(dom.isCell);
              // isOnData: judge whether range is on data node or not
              this.isOnData = makeIsOn(dom.isData);
  
              /**
               * @system {Function} pred
               * @return {Boolean}
               */
              this.isLeftEdgeOf = function (pred) {
                  if (!dom.isLeftEdgePoint(this.getStartPoint())) {
                      return false;
                  }
  
                  var node = dom.ancestor(this.sc, pred);
                  return node && dom.isLeftEdgeOf(this.sc, node);
              };
  
              /**
               * returns whether range was collapsed or not
               */
              this.isCollapsed = function () {
                  return sc === ec && so === eo;
              };
  
              /**
               * wrap inline nodes which children of body with paragraph
               *
               * @return {WrappedRange}
               */
              this.wrapBodyInlineWithPara = function () {
                  if (dom.isBodyContainer(sc) && dom.isEmpty(sc)) {
                      sc.innerHTML = dom.emptyPara;
                      return new WrappedRange(sc.firstChild, 0, sc.firstChild, 0);
                  }
  
                  /**
                   * [workaround] firefox often create range on not visible point. so normalize here.
                   *  - firefox: |<p>text</p>|
                   *  - chrome: <p>|text|</p>
                   */
                  var rng = this.normalize();
                  if (dom.isParaInline(sc) || dom.isPara(sc)) {
                      return rng;
                  }
  
                  // find inline top ancestor
                  var topAncestor;
                  if (dom.isInline(rng.sc)) {
                      var ancestors = dom.listAncestor(rng.sc, func.not(dom.isInline));
                      topAncestor = list.last(ancestors);
                      if (!dom.isInline(topAncestor)) {
                          topAncestor = ancestors[ancestors.length - 2] || rng.sc.childNodes[rng.so];
                      }
                  } else {
                      topAncestor = rng.sc.childNodes[rng.so > 0 ? rng.so - 1 : 0];
                  }
  
                  // siblings not in paragraph
                  var inlineSiblings = dom.listPrev(topAncestor, dom.isParaInline).reverse();
                  inlineSiblings = inlineSiblings.concat(dom.listNext(topAncestor.nextSibling, dom.isParaInline));
  
                  // wrap with paragraph
                  if (inlineSiblings.length) {
                      var para = dom.wrap(list.head(inlineSiblings), 'p');
                      dom.appendChildNodes(para, list.tail(inlineSiblings));
                  }
  
                  return this.normalize();
              };
  
              /**
               * insert node at current cursor
               *
               * @system {Node} node
               * @return {Node}
               */
              this.insertNode = function (node) {
                  var rng = this.wrapBodyInlineWithPara().deleteContents();
                  var info = dom.splitPoint(rng.getStartPoint(), dom.isInline(node));
  
                  if (info.rightNode) {
                      info.rightNode.parentNode.insertBefore(node, info.rightNode);
                  } else {
                      info.container.appendChild(node);
                  }
  
                  return node;
              };
  
              /**
               * insert html at current cursor
               */
              this.pasteHTML = function (markup) {
                  var contentsContainer = $('<div></div>').html(markup)[0];
                  var childNodes = list.from(contentsContainer.childNodes);
  
                  var rng = this.wrapBodyInlineWithPara().deleteContents();
  
                  return childNodes.reverse().map(function (childNode) {
                      return rng.insertNode(childNode);
                  }).reverse();
              };
  
              /**
               * returns text in range
               *
               * @return {String}
               */
              this.toString = function () {
                  var nativeRng = nativeRange();
                  return agent.isW3CRangeSupport ? nativeRng.toString() : nativeRng.text;
              };
  
              /**
               * returns range for word before cursor
               *
               * @system {Boolean} [findAfter] - find after cursor, default: false
               * @return {WrappedRange}
               */
              this.getWordRange = function (findAfter) {
                  var endPoint = this.getEndPoint();
  
                  if (!dom.isCharPoint(endPoint)) {
                      return this;
                  }
  
                  var startPoint = dom.prevPointUntil(endPoint, function (point) {
                      return !dom.isCharPoint(point);
                  });
  
                  if (findAfter) {
                      endPoint = dom.nextPointUntil(endPoint, function (point) {
                          return !dom.isCharPoint(point);
                      });
                  }
  
                  return new WrappedRange(
                      startPoint.node,
                      startPoint.offset,
                      endPoint.node,
                      endPoint.offset
                  );
              };
  
              /**
               * create offsetPath bookmark
               *
               * @system {Node} editable
               */
              this.bookmark = function (editable) {
                  return {
                      s: {
                          path: dom.makeOffsetPath(editable, sc),
                          offset: so
                      },
                      e: {
                          path: dom.makeOffsetPath(editable, ec),
                          offset: eo
                      }
                  };
              };
  
              /**
               * create offsetPath bookmark base on paragraph
               *
               * @system {Node[]} paras
               */
              this.paraBookmark = function (paras) {
                  return {
                      s: {
                          path: list.tail(dom.makeOffsetPath(list.head(paras), sc)),
                          offset: so
                      },
                      e: {
                          path: list.tail(dom.makeOffsetPath(list.last(paras), ec)),
                          offset: eo
                      }
                  };
              };
  
              /**
               * getClientRects
               * @return {Rect[]}
               */
              this.getClientRects = function () {
                  var nativeRng = nativeRange();
                  return nativeRng.getClientRects();
              };
          };
  
          /**
           * @class core.range
           *
           * Data structure
           *  * BoundaryPoint: a point of dom tree
           *  * BoundaryPoints: two boundaryPoints corresponding to the start and the end of the Range
           *
           * See to http://www.w3.org/TR/DOM-Level-2-Traversal-Range/ranges.html#Level-2-Range-Position
           *
           * @singleton
           * @alternateClassName range
           */
          return {
              /**
               * create Range Object From arguments or Browser Selection
               *
               * @system {Node} sc - start container
               * @system {Number} so - start offset
               * @system {Node} ec - end container
               * @system {Number} eo - end offset
               * @return {WrappedRange}
               */
              create: function (sc, so, ec, eo) {
                  if (arguments.length === 4) {
                      return new WrappedRange(sc, so, ec, eo);
                  } else if (arguments.length === 2) { //collapsed
                      ec = sc;
                      eo = so;
                      return new WrappedRange(sc, so, ec, eo);
                  } else {
                      var wrappedRange = this.createFromSelection();
                      if (!wrappedRange && arguments.length === 1) {
                          wrappedRange = this.createFromNode(arguments[0]);
                          return wrappedRange.collapse(dom.emptyPara === arguments[0].innerHTML);
                      }
                      return wrappedRange;
                  }
              },
  
              createFromSelection: function () {
                  var sc, so, ec, eo;
                  if (agent.isW3CRangeSupport) {
                      var selection = document.getSelection();
                      if (!selection || selection.rangeCount === 0) {
                          return null;
                      } else if (dom.isBody(selection.anchorNode)) {
                          // Firefox: returns entire body as range on initialization.
                          // We won't never need it.
                          return null;
                      }
  
                      var nativeRng = selection.getRangeAt(0);
                      sc = nativeRng.startContainer;
                      so = nativeRng.startOffset;
                      ec = nativeRng.endContainer;
                      eo = nativeRng.endOffset;
                  } else { // IE8: TextRange
                      var textRange = document.selection.createRange();
                      var textRangeEnd = textRange.duplicate();
                      textRangeEnd.collapse(false);
                      var textRangeStart = textRange;
                      textRangeStart.collapse(true);
  
                      var startPoint = textRangeToPoint(textRangeStart, true),
                          endPoint = textRangeToPoint(textRangeEnd, false);
  
                      // same visible point case: range was collapsed.
                      if (dom.isText(startPoint.node) && dom.isLeftEdgePoint(startPoint) &&
                          dom.isTextNode(endPoint.node) && dom.isRightEdgePoint(endPoint) &&
                          endPoint.node.nextSibling === startPoint.node) {
                          startPoint = endPoint;
                      }
  
                      sc = startPoint.cont;
                      so = startPoint.offset;
                      ec = endPoint.cont;
                      eo = endPoint.offset;
                  }
  
                  return new WrappedRange(sc, so, ec, eo);
              },
  
              /**
               * @method
               *
               * create WrappedRange from node
               *
               * @system {Node} node
               * @return {WrappedRange}
               */
              createFromNode: function (node) {
                  var sc = node;
                  var so = 0;
                  var ec = node;
                  var eo = dom.nodeLength(ec);
  
                  // browsers can't target a picture or void node
                  if (dom.isVoid(sc)) {
                      so = dom.listPrev(sc).length - 1;
                      sc = sc.parentNode;
                  }
                  if (dom.isBR(ec)) {
                      eo = dom.listPrev(ec).length - 1;
                      ec = ec.parentNode;
                  } else if (dom.isVoid(ec)) {
                      eo = dom.listPrev(ec).length;
                      ec = ec.parentNode;
                  }
  
                  return this.create(sc, so, ec, eo);
              },
  
              /**
               * create WrappedRange from node after position
               *
               * @system {Node} node
               * @return {WrappedRange}
               */
              createFromNodeBefore: function (node) {
                  return this.createFromNode(node).collapse(true);
              },
  
              /**
               * create WrappedRange from node after position
               *
               * @system {Node} node
               * @return {WrappedRange}
               */
              createFromNodeAfter: function (node) {
                  return this.createFromNode(node).collapse();
              },
  
              /**
               * @method
               *
               * create WrappedRange from bookmark
               *
               * @system {Node} editable
               * @system {Object} bookmark
               * @return {WrappedRange}
               */
              createFromBookmark: function (editable, bookmark) {
                  var sc = dom.fromOffsetPath(editable, bookmark.s.path);
                  var so = bookmark.s.offset;
                  var ec = dom.fromOffsetPath(editable, bookmark.e.path);
                  var eo = bookmark.e.offset;
                  return new WrappedRange(sc, so, ec, eo);
              },
  
              /**
               * @method
               *
               * create WrappedRange from paraBookmark
               *
               * @system {Object} bookmark
               * @system {Node[]} paras
               * @return {WrappedRange}
               */
              createFromParaBookmark: function (bookmark, paras) {
                  var so = bookmark.s.offset;
                  var eo = bookmark.e.offset;
                  var sc = dom.fromOffsetPath(list.head(paras), bookmark.s.path);
                  var ec = dom.fromOffsetPath(list.last(paras), bookmark.e.path);
  
                  return new WrappedRange(sc, so, ec, eo);
              }
          };
      })();
  
      /**
       * @class core.async
       *
       * Async functions which returns `Promise`
       *
       * @singleton
       * @alternateClassName async
       */
      var async = (function () {
          /**
           * @method readFileAsDataURL
           *
           * read contents of file as representing URL
           *
           * @system {File} file
           * @return {Promise} - then: dataUrl
           */
          var readFileAsDataURL = function (file) {
              return $.Deferred(function (deferred) {
                  $.extend(new FileReader(), {
                      onload: function (e) {
                          var dataURL = e.target.result;
                          deferred.resolve(dataURL);
                      },
                      onerror: function () {
                          deferred.reject(this);
                      }
                  }).readAsDataURL(file);
              }).promise();
          };
  
          /**
           * @method createImage
           *
           * create `<image>` from url string
           *
           * @system {String} url
           * @return {Promise} - then: $image
           */
          var createImage = function (url) {
              return $.Deferred(function (deferred) {
                  var $img = $('<img>');
  
                  $img.one('load', function () {
                      $img.off('error abort');
                      deferred.resolve($img);
                  }).one('error abort', function () {
                      $img.off('load').detach();
                      deferred.reject($img);
                  }).css({
                      display: 'none'
                  }).appendTo(document.body).attr('src', url);
              }).promise();
          };
  
          return {
              readFileAsDataURL: readFileAsDataURL,
              createImage: createImage
          };
      })();
  
      /**
       * @class editing.History
       *
       * Editor History
       *
       */
      var History = function ($editable) {
          var stack = [], stackOffset = -1;
          var editable = $editable[0];
  
          var makeSnapshot = function () {
              var rng = range.create(editable);
              var emptyBookmark = {s: {path: [], offset: 0}, e: {path: [], offset: 0}};
  
              return {
                  contents: $editable.html(),
                  bookmark: (rng ? rng.bookmark(editable) : emptyBookmark)
              };
          };
  
          var applySnapshot = function (snapshot) {
              if (snapshot.contents !== null) {
                  $editable.html(snapshot.contents);
              }
              if (snapshot.bookmark !== null) {
                  range.createFromBookmark(editable, snapshot.bookmark).select();
              }
          };
  
          /**
           * @method rewind
           * Rewinds the history stack back to the first snapshot taken.
           * Leaves the stack intact, so that "Redo" can still be used.
           */
          this.rewind = function () {
              // Create snap shot if not yet recorded
              if ($editable.html() !== stack[stackOffset].contents) {
                  this.recordUndo();
              }
  
              // Return to the first available snapshot.
              stackOffset = 0;
  
              // Apply that snapshot.
              applySnapshot(stack[stackOffset]);
          };
  
          /**
           * @method reset
           * Resets the history stack completely; reverting to an empty editor.
           */
          this.reset = function () {
              // Clear the stack.
              stack = [];
  
              // Restore stackOffset to its original value.
              stackOffset = -1;
  
              // Clear the editable area.
              $editable.html('');
  
              // Record our first snapshot (of nothing).
              this.recordUndo();
          };
  
          /**
           * undo
           */
          this.undo = function () {
              // Create snap shot if not yet recorded
              if ($editable.html() !== stack[stackOffset].contents) {
                  this.recordUndo();
              }
  
              if (0 < stackOffset) {
                  stackOffset--;
                  applySnapshot(stack[stackOffset]);
              }
          };
  
          /**
           * redo
           */
          this.redo = function () {
              if (stack.length - 1 > stackOffset) {
                  stackOffset++;
                  applySnapshot(stack[stackOffset]);
              }
          };
  
          /**
           * recorded undo
           */
          this.recordUndo = function () {
              stackOffset++;
  
              // Wash out stack after stackOffset
              if (stack.length > stackOffset) {
                  stack = stack.slice(0, stackOffset);
              }
  
              // Create new snapshot and push it to the end
              stack.push(makeSnapshot());
          };
      };
  
      /**
       * @class editing.Style
       *
       * Style
       *
       */
      var Style = function () {
          /**
           * @method jQueryCSS
           *
           * [workaround] for old jQuery
           * passing an array of style properties to .css()
           * will result in an object of property-value pairs.
           * (compability with version < 1.9)
           *
           * @private
           * @system  {jQuery} $obj
           * @system  {Array} propertyNames - An array of one or more CSS properties.
           * @return {Object}
           */
          var jQueryCSS = function ($obj, propertyNames) {
              if (agent.jqueryVersion < 1.9) {
                  var result = {};
                  $.each(propertyNames, function (idx, propertyName) {
                      result[propertyName] = $obj.css(propertyName);
                  });
                  return result;
              }
              return $obj.css.call($obj, propertyNames);
          };
  
          /**
           * returns style object from node
           *
           * @system {jQuery} $node
           * @return {Object}
           */
          this.fromNode = function ($node) {
              var properties = ['font-family', 'font-size', 'text-align', 'list-style-type', 'line-height'];
              var styleInfo = jQueryCSS($node, properties) || {};
              styleInfo['font-size'] = parseInt(styleInfo['font-size'], 10);
              return styleInfo;
          };
  
          /**
           * paragraph level style
           *
           * @system {WrappedRange} rng
           * @system {Object} styleInfo
           */
          this.stylePara = function (rng, styleInfo) {
              $.each(rng.nodes(dom.isPara, {
                  includeAncestor: true
              }), function (idx, para) {
                  $(para).css(styleInfo);
              });
          };
  
          /**
           * insert and returns styleNodes on range.
           *
           * @system {WrappedRange} rng
           * @system {Object} [options] - options for styleNodes
           * @system {String} [options.nodeName] - default: `SPAN`
           * @system {Boolean} [options.expandClosestSibling] - default: `false`
           * @system {Boolean} [options.onlyPartialContains] - default: `false`
           * @return {Node[]}
           */
          this.styleNodes = function (rng, options) {
              rng = rng.splitText();
  
              var nodeName = options && options.nodeName || 'SPAN';
              var expandClosestSibling = !!(options && options.expandClosestSibling);
              var onlyPartialContains = !!(options && options.onlyPartialContains);
  
              if (rng.isCollapsed()) {
                  return [rng.insertNode(dom.create(nodeName))];
              }
  
              var pred = dom.makePredByNodeName(nodeName);
              var nodes = rng.nodes(dom.isText, {
                  fullyContains: true
              }).map(function (text) {
                  return dom.singleChildAncestor(text, pred) || dom.wrap(text, nodeName);
              });
  
              if (expandClosestSibling) {
                  if (onlyPartialContains) {
                      var nodesInRange = rng.nodes();
                      // compose with partial contains predication
                      pred = func.and(pred, function (node) {
                          return list.contains(nodesInRange, node);
                      });
                  }
  
                  return nodes.map(function (node) {
                      var siblings = dom.withClosestSiblings(node, pred);
                      var head = list.head(siblings);
                      var tails = list.tail(siblings);
                      $.each(tails, function (idx, elem) {
                          dom.appendChildNodes(head, elem.childNodes);
                          dom.remove(elem);
                      });
                      return list.head(siblings);
                  });
              } else {
                  return nodes;
              }
          };
  
          /**
           * get current style on cursor
           *
           * @system {WrappedRange} rng
           * @return {Object} - object contains style properties.
           */
          this.current = function (rng) {
              var $cont = $(!dom.isElement(rng.sc) ? rng.sc.parentNode : rng.sc);
              var styleInfo = this.fromNode($cont);
  
              // document.queryCommandState for toggle state
              // [workaround] prevent Firefox nsresult: "0x80004005 (NS_ERROR_FAILURE)"
              try {
                  styleInfo = $.extend(styleInfo, {
                      'font-bold': document.queryCommandState('bold') ? 'bold' : 'normal',
                      'font-italic': document.queryCommandState('italic') ? 'italic' : 'normal',
                      'font-underline': document.queryCommandState('underline') ? 'underline' : 'normal',
                      'font-subscript': document.queryCommandState('subscript') ? 'subscript' : 'normal',
                      'font-superscript': document.queryCommandState('superscript') ? 'superscript' : 'normal',
                      'font-strikethrough': document.queryCommandState('strikethrough') ? 'strikethrough' : 'normal',
                      'font-family': document.queryCommandValue('fontname') || styleInfo['font-family']
                  });
              } catch (e) {
              }
  
              // list-style-type to list-style(unordered, ordered)
              if (!rng.isOnList()) {
                  styleInfo['list-style'] = 'none';
              } else {
                  var orderedTypes = ['circle', 'disc', 'disc-leading-zero', 'square'];
                  var isUnordered = $.inArray(styleInfo['list-style-type'], orderedTypes) > -1;
                  styleInfo['list-style'] = isUnordered ? 'unordered' : 'ordered';
              }
  
              var para = dom.ancestor(rng.sc, dom.isPara);
              if (para && para.style['line-height']) {
                  styleInfo['line-height'] = para.style.lineHeight;
              } else {
                  var lineHeight = parseInt(styleInfo['line-height'], 10) / parseInt(styleInfo['font-size'], 10);
                  styleInfo['line-height'] = lineHeight.toFixed(1);
              }
  
              styleInfo.anchor = rng.isOnAnchor() && dom.ancestor(rng.sc, dom.isAnchor);
              styleInfo.ancestors = dom.listAncestor(rng.sc, dom.isEditable);
              styleInfo.range = rng;
  
              return styleInfo;
          };
      };
  
  
      /**
       * @class editing.Bullet
       *
       * @alternateClassName Bullet
       */
      var Bullet = function () {
          var self = this;
  
          /**
           * toggle ordered list
           */
          this.insertOrderedList = function (editable) {
              this.toggleList('OL', editable);
          };
  
          /**
           * toggle unordered list
           */
          this.insertUnorderedList = function (editable) {
              this.toggleList('UL', editable);
          };
  
          /**
           * indent
           */
          this.indent = function (editable) {
              var self = this;
              var rng = range.create(editable).wrapBodyInlineWithPara();
  
              var paras = rng.nodes(dom.isPara, {includeAncestor: true});
              var clustereds = list.clusterBy(paras, func.peq2('parentNode'));
  
              $.each(clustereds, function (idx, paras) {
                  var head = list.head(paras);
                  if (dom.isLi(head)) {
                      self.wrapList(paras, head.parentNode.nodeName);
                  } else {
                      $.each(paras, function (idx, para) {
                          $(para).css('marginLeft', function (idx, val) {
                              return (parseInt(val, 10) || 0) + 25;
                          });
                      });
                  }
              });
  
              rng.select();
          };
  
          /**
           * outdent
           */
          this.outdent = function (editable) {
              var self = this;
              var rng = range.create(editable).wrapBodyInlineWithPara();
  
              var paras = rng.nodes(dom.isPara, {includeAncestor: true});
              var clustereds = list.clusterBy(paras, func.peq2('parentNode'));
  
              $.each(clustereds, function (idx, paras) {
                  var head = list.head(paras);
                  if (dom.isLi(head)) {
                      self.releaseList([paras]);
                  } else {
                      $.each(paras, function (idx, para) {
                          $(para).css('marginLeft', function (idx, val) {
                              val = (parseInt(val, 10) || 0);
                              return val > 25 ? val - 25 : '';
                          });
                      });
                  }
              });
  
              rng.select();
          };
  
          /**
           * toggle list
           *
           * @system {String} listName - OL or UL
           */
          this.toggleList = function (listName, editable) {
              var rng = range.create(editable).wrapBodyInlineWithPara();
  
              var paras = rng.nodes(dom.isPara, {includeAncestor: true});
              var bookmark = rng.paraBookmark(paras);
              var clustereds = list.clusterBy(paras, func.peq2('parentNode'));
  
              // paragraph to list
              if (list.find(paras, dom.isPurePara)) {
                  var wrappedParas = [];
                  $.each(clustereds, function (idx, paras) {
                      wrappedParas = wrappedParas.concat(self.wrapList(paras, listName));
                  });
                  paras = wrappedParas;
                  // list to paragraph or change list style
              } else {
                  var diffLists = rng.nodes(dom.isList, {
                      includeAncestor: true
                  }).filter(function (listNode) {
                      return !$.nodeName(listNode, listName);
                  });
  
                  if (diffLists.length) {
                      $.each(diffLists, function (idx, listNode) {
                          dom.replace(listNode, listName);
                      });
                  } else {
                      paras = this.releaseList(clustereds, true);
                  }
              }
  
              range.createFromParaBookmark(bookmark, paras).select();
          };
  
          /**
           * @system {Node[]} paras
           * @system {String} listName
           * @return {Node[]}
           */
          this.wrapList = function (paras, listName) {
              var head = list.head(paras);
              var last = list.last(paras);
  
              var prevList = dom.isList(head.previousSibling) && head.previousSibling;
              var nextList = dom.isList(last.nextSibling) && last.nextSibling;
  
              var listNode = prevList || dom.insertAfter(dom.create(listName || 'UL'), last);
  
              // P to LI
              paras = paras.map(function (para) {
                  return dom.isPurePara(para) ? dom.replace(para, 'LI') : para;
              });
  
              // append to list(<ul>, <ol>)
              dom.appendChildNodes(listNode, paras);
  
              if (nextList) {
                  dom.appendChildNodes(listNode, list.from(nextList.childNodes));
                  dom.remove(nextList);
              }
  
              return paras;
          };
  
          /**
           * @method releaseList
           *
           * @system {Array[]} clustereds
           * @system {Boolean} isEscapseToBody
           * @return {Node[]}
           */
          this.releaseList = function (clustereds, isEscapseToBody) {
              var releasedParas = [];
  
              $.each(clustereds, function (idx, paras) {
                  var head = list.head(paras);
                  var last = list.last(paras);
  
                  var headList = isEscapseToBody ? dom.lastAncestor(head, dom.isList) :
                      head.parentNode;
                  var lastList = headList.childNodes.length > 1 ? dom.splitTree(headList, {
                      node: last.parentNode,
                      offset: dom.position(last) + 1
                  }, {
                      isSkipPaddingBlankHTML: true
                  }) : null;
  
                  var middleList = dom.splitTree(headList, {
                      node: head.parentNode,
                      offset: dom.position(head)
                  }, {
                      isSkipPaddingBlankHTML: true
                  });
  
                  paras = isEscapseToBody ? dom.listDescendant(middleList, dom.isLi) :
                      list.from(middleList.childNodes).filter(dom.isLi);
  
                  // LI to P
                  if (isEscapseToBody || !dom.isList(headList.parentNode)) {
                      paras = paras.map(function (para) {
                          return dom.replace(para, 'P');
                      });
                  }
  
                  $.each(list.from(paras).reverse(), function (idx, para) {
                      dom.insertAfter(para, headList);
                  });
  
                  // remove empty lists
                  var rootLists = list.compact([headList, middleList, lastList]);
                  $.each(rootLists, function (idx, rootList) {
                      var listNodes = [rootList].concat(dom.listDescendant(rootList, dom.isList));
                      $.each(listNodes.reverse(), function (idx, listNode) {
                          if (!dom.nodeLength(listNode)) {
                              dom.remove(listNode, true);
                          }
                      });
                  });
  
                  releasedParas = releasedParas.concat(paras);
              });
  
              return releasedParas;
          };
      };
  
  
      /**
       * @class editing.Typing
       *
       * Typing
       *
       */
      var Typing = function () {
  
          // a Bullet instance to toggle lists off
          var bullet = new Bullet();
  
          /**
           * insert tab
           *
           * @system {WrappedRange} rng
           * @system {Number} tabsize
           */
          this.insertTab = function (rng, tabsize) {
              var tab = dom.createText(new Array(tabsize + 1).join(dom.NBSP_CHAR));
              rng = rng.deleteContents();
              rng.insertNode(tab, true);
  
              rng = range.create(tab, tabsize);
              rng.select();
          };
  
          /**
           * insert paragraph
           */
          this.insertParagraph = function (editable) {
              var rng = range.create(editable);
  
              // deleteContents on range.
              rng = rng.deleteContents();
  
              // Wrap range if it needs to be wrapped by paragraph
              rng = rng.wrapBodyInlineWithPara();
  
              // finding paragraph
              var splitRoot = dom.ancestor(rng.sc, dom.isPara);
  
              var nextPara;
              // on paragraph: split paragraph
              if (splitRoot) {
                  // if it is an empty line with li
                  if (dom.isEmpty(splitRoot) && dom.isLi(splitRoot)) {
                      // toogle UL/OL and escape
                      bullet.toggleList(splitRoot.parentNode.nodeName);
                      return;
                      // if it is an empty line with para on blockquote
                  } else if (dom.isEmpty(splitRoot) && dom.isPara(splitRoot) && dom.isBlockquote(splitRoot.parentNode)) {
                      // escape blockquote
                      dom.insertAfter(splitRoot, splitRoot.parentNode);
                      nextPara = splitRoot;
                      // if new line has content (not a line break)
                  } else {
                      nextPara = dom.splitTree(splitRoot, rng.getStartPoint());
  
                      var emptyAnchors = dom.listDescendant(splitRoot, dom.isEmptyAnchor);
                      emptyAnchors = emptyAnchors.concat(dom.listDescendant(nextPara, dom.isEmptyAnchor));
  
                      $.each(emptyAnchors, function (idx, anchor) {
                          dom.remove(anchor);
                      });
  
                      // replace empty heading, pre or custom-made styleTag with P tag
                      if ((dom.isHeading(nextPara) || dom.isPre(nextPara) || dom.isCustomStyleTag(nextPara)) && dom.isEmpty(nextPara)) {
                          nextPara = dom.replace(nextPara, 'p');
                      }
                  }
                  // no paragraph: insert empty paragraph
              } else {
                  var next = rng.sc.childNodes[rng.so];
                  nextPara = $(dom.emptyPara)[0];
                  if (next) {
                      rng.sc.insertBefore(nextPara, next);
                  } else {
                      rng.sc.appendChild(nextPara);
                  }
              }
  
              range.create(nextPara, 0).normalize().select().scrollIntoView(editable);
          };
      };
  
  
      /**
       * @class Create a virtual table to create what actions to do in change.
       * @system {object} startPoint Cell selected to apply change.
       * @system {enum} where  Where change will be applied Row or Col. Use enum: TableResultAction.where
       * @system {enum} action Action to be applied. Use enum: TableResultAction.requestAction
       * @system {object} domTable Dom element of table to make changes.
       */
      var TableResultAction = function (startPoint, where, action, domTable) {
          var _startPoint = {'colPos': 0, 'rowPos': 0};
          var _virtualTable = [];
          var _actionCellList = [];
  
          //////////////////////////////////////////////
          // Private functions
          //////////////////////////////////////////////
  
          /**
           * Set the startPoint of action.
           */
          function setStartPoint() {
              if (!startPoint || !startPoint.tagName || (startPoint.tagName.toLowerCase() !== 'td' && startPoint.tagName.toLowerCase() !== 'th')) {
                  console.error('Impossible to identify start Cell point.', startPoint);
                  return;
              }
              _startPoint.colPos = startPoint.cellIndex;
              if (!startPoint.parentElement || !startPoint.parentElement.tagName || startPoint.parentElement.tagName.toLowerCase() !== 'tr') {
                  console.error('Impossible to identify start Row point.', startPoint);
                  return;
              }
              _startPoint.rowPos = startPoint.parentElement.rowIndex;
          }
  
          /**
           * Define virtual table position info object.
           *
           * @system {int} rowIndex Index position in line of virtual table.
           * @system {int} cellIndex Index position in column of virtual table.
           * @system {object} baseRow Row affected by this position.
           * @system {object} baseCell Cell affected by this position.
           * @system {bool} isSpan Inform if it is an span cell/row.
           */
          function setVirtualTablePosition(rowIndex, cellIndex, baseRow, baseCell, isRowSpan, isColSpan, isVirtualCell) {
              var objPosition = {
                  'baseRow': baseRow,
                  'baseCell': baseCell,
                  'isRowSpan': isRowSpan,
                  'isColSpan': isColSpan,
                  'isVirtual': isVirtualCell
              };
              if (!_virtualTable[rowIndex]) {
                  _virtualTable[rowIndex] = [];
              }
              _virtualTable[rowIndex][cellIndex] = objPosition;
          }
  
          /**
           * Create action cell object.
           *
           * @system {object} virtualTableCellObj Object of specific position on virtual table.
           * @system {enum} resultAction Action to be applied in that item.
           */
          function getActionCell(virtualTableCellObj, resultAction, virtualRowPosition, virtualColPosition) {
              return {
                  'baseCell': virtualTableCellObj.baseCell,
                  'action': resultAction,
                  'virtualTable': {
                      'rowIndex': virtualRowPosition,
                      'cellIndex': virtualColPosition
                  }
              };
          }
  
          /**
           * Recover free index of row to append Cell.
           *
           * @system {int} rowIndex Index of row to find free space.
           * @system {int} cellIndex Index of cell to find free space in table.
           */
          function recoverCellIndex(rowIndex, cellIndex) {
              if (!_virtualTable[rowIndex]) {
                  return cellIndex;
              }
              if (!_virtualTable[rowIndex][cellIndex]) {
                  return cellIndex;
              }
  
              var newCellIndex = cellIndex;
              while (_virtualTable[rowIndex][newCellIndex]) {
                  newCellIndex++;
                  if (!_virtualTable[rowIndex][newCellIndex]) {
                      return newCellIndex;
                  }
              }
          }
  
          /**
           * Recover info about row and cell and add information to virtual table.
           *
           * @system {object} row Row to recover information.
           * @system {object} cell Cell to recover information.
           */
          function addCellInfoToVirtual(row, cell) {
              var cellIndex = recoverCellIndex(row.rowIndex, cell.cellIndex);
              var cellHasColspan = (cell.colSpan > 1);
              var cellHasRowspan = (cell.rowSpan > 1);
              var isThisSelectedCell = (row.rowIndex === _startPoint.rowPos && cell.cellIndex === _startPoint.colPos);
              setVirtualTablePosition(row.rowIndex, cellIndex, row, cell, cellHasRowspan, cellHasColspan, false);
  
              // Add span rows to virtual Table.
              var rowspanNumber = cell.attributes.rowSpan ? parseInt(cell.attributes.rowSpan.value, 10) : 0;
              if (rowspanNumber > 1) {
                  for (var rp = 1; rp < rowspanNumber; rp++) {
                      var rowspanIndex = row.rowIndex + rp;
                      adjustStartPoint(rowspanIndex, cellIndex, cell, isThisSelectedCell);
                      setVirtualTablePosition(rowspanIndex, cellIndex, row, cell, true, cellHasColspan, true);
                  }
              }
  
              // Add span cols to virtual table.
              var colspanNumber = cell.attributes.colSpan ? parseInt(cell.attributes.colSpan.value, 10) : 0;
              if (colspanNumber > 1) {
                  for (var cp = 1; cp < colspanNumber; cp++) {
                      var cellspanIndex = recoverCellIndex(row.rowIndex, (cellIndex + cp));
                      adjustStartPoint(row.rowIndex, cellspanIndex, cell, isThisSelectedCell);
                      setVirtualTablePosition(row.rowIndex, cellspanIndex, row, cell, cellHasRowspan, true, true);
                  }
              }
          }
  
          /**
           * Process validation and adjust of start point if needed
           *
           * @system {int} rowIndex
           * @system {int} cellIndex
           * @system {object} cell
           * @system {bool} isSelectedCell
           */
          function adjustStartPoint(rowIndex, cellIndex, cell, isSelectedCell) {
              if (rowIndex === _startPoint.rowPos && _startPoint.colPos >= cell.cellIndex && cell.cellIndex <= cellIndex && !isSelectedCell) {
                  _startPoint.colPos++;
              }
          }
  
          /**
           * Create virtual table of cells with all cells, including span cells.
           */
          function createVirtualTable() {
              var rows = domTable.rows;
              for (var rowIndex = 0; rowIndex < rows.length; rowIndex++) {
                  var cells = rows[rowIndex].cells;
                  for (var cellIndex = 0; cellIndex < cells.length; cellIndex++) {
                      addCellInfoToVirtual(rows[rowIndex], cells[cellIndex]);
                  }
              }
          }
  
          /**
           * Get action to be applied on the cell.
           *
           * @system {object} cell virtual table cell to apply action
           */
          function getDeleteResultActionToCell(cell) {
              switch (where) {
                  case TableResultAction.where.Column:
                      if (cell.isColSpan) {
                          return TableResultAction.resultAction.SubtractSpanCount;
                      }
                      break;
                  case TableResultAction.where.Row:
                      if (!cell.isVirtual && cell.isRowSpan) {
                          return TableResultAction.resultAction.AddCell;
                      } else if (cell.isRowSpan) {
                          return TableResultAction.resultAction.SubtractSpanCount;
                      }
                      break;
              }
              return TableResultAction.resultAction.RemoveCell;
          }
  
          /**
           * Get action to be applied on the cell.
           *
           * @system {object} cell virtual table cell to apply action
           */
          function getAddResultActionToCell(cell) {
              switch (where) {
                  case TableResultAction.where.Column:
                      if (cell.isColSpan) {
                          return TableResultAction.resultAction.SumSpanCount;
                      } else if (cell.isRowSpan && cell.isVirtual) {
                          return TableResultAction.resultAction.Ignore;
                      }
                      break;
                  case TableResultAction.where.Row:
                      if (cell.isRowSpan) {
                          return TableResultAction.resultAction.SumSpanCount;
                      } else if (cell.isColSpan && cell.isVirtual) {
                          return TableResultAction.resultAction.Ignore;
                      }
                      break;
              }
              return TableResultAction.resultAction.AddCell;
          }
  
          function init() {
              setStartPoint();
              createVirtualTable();
          }
  
          //////////////////////////////////////////////
          // Public functions
          //////////////////////////////////////////////
  
          /**
           * Recover array os what to do in table.
           */
          this.getActionList = function () {
              var fixedRow = (where === TableResultAction.where.Row) ? _startPoint.rowPos : -1;
              var fixedCol = (where === TableResultAction.where.Column) ? _startPoint.colPos : -1;
  
              var actualPosition = 0;
              var canContinue = true;
              while (canContinue) {
                  var rowPosition = (fixedRow >= 0) ? fixedRow : actualPosition;
                  var colPosition = (fixedCol >= 0) ? fixedCol : actualPosition;
                  var row = _virtualTable[rowPosition];
                  if (!row) {
                      canContinue = false;
                      return _actionCellList;
                  }
                  var cell = row[colPosition];
                  if (!cell) {
                      canContinue = false;
                      return _actionCellList;
                  }
  
                  // Define action to be applied in this cell
                  var resultAction = TableResultAction.resultAction.Ignore;
                  switch (action) {
                      case TableResultAction.requestAction.Add:
                          resultAction = getAddResultActionToCell(cell);
                          break;
                      case TableResultAction.requestAction.Delete:
                          resultAction = getDeleteResultActionToCell(cell);
                          break;
                  }
                  _actionCellList.push(getActionCell(cell, resultAction, rowPosition, colPosition));
                  actualPosition++;
              }
  
              return _actionCellList;
          };
  
          init();
      };
      /**
       *
       * Where action occours enum.
       */
      TableResultAction.where = {'Row': 0, 'Column': 1};
      /**
       *
       * Requested action to apply enum.
       */
      TableResultAction.requestAction = {'Add': 0, 'Delete': 1};
      /**
       *
       * Result action to be executed enum.
       */
      TableResultAction.resultAction = {
          'Ignore': 0,
          'SubtractSpanCount': 1,
          'RemoveCell': 2,
          'AddCell': 3,
          'SumSpanCount': 4
      };
  
      /**
       *
       * @class editing.Table
       *
       * Table
       *
       */
      var Table = function () {
          /**
           * handle tab key
           *
           * @system {WrappedRange} rng
           * @system {Boolean} isShift
           */
          this.tab = function (rng, isShift) {
              var cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
              var table = dom.ancestor(cell, dom.isTable);
              var cells = dom.listDescendant(table, dom.isCell);
  
              var nextCell = list[isShift ? 'prev' : 'next'](cells, cell);
              if (nextCell) {
                  range.create(nextCell, 0).select();
              }
          };
  
          /**
           * Add a new row
           *
           * @system {WrappedRange} rng
           * @system {String} position (top/bottom)
           * @return {Node}
           */
          this.addRow = function (rng, position) {
              var cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
  
              var currentTr = $(cell).closest('tr');
              var trAttributes = this.recoverAttributes(currentTr);
              var html = $('<tr' + trAttributes + '></tr>');
  
              var vTable = new TableResultAction(cell, TableResultAction.where.Row,
                  TableResultAction.requestAction.Add, $(currentTr).closest('table')[0]);
              var actions = vTable.getActionList();
  
              for (var idCell = 0; idCell < actions.length; idCell++) {
                  var currentCell = actions[idCell];
                  var tdAttributes = this.recoverAttributes(currentCell.baseCell);
                  switch (currentCell.action) {
                      case TableResultAction.resultAction.AddCell:
                          html.append('<td' + tdAttributes + '>' + dom.blank + '</td>');
                          break;
                      case TableResultAction.resultAction.SumSpanCount:
                          if (position === 'top') {
                              var baseCellTr = currentCell.baseCell.parent;
                              var isTopFromRowSpan = (!baseCellTr ? 0 : currentCell.baseCell.closest('tr').rowIndex) <= currentTr[0].rowIndex;
                              if (isTopFromRowSpan) {
                                  var newTd = $('<div></div>').append($('<td' + tdAttributes + '>' + dom.blank + '</td>').removeAttr('rowspan')).html();
                                  html.append(newTd);
                                  break;
                              }
                          }
                          var rowspanNumber = parseInt(currentCell.baseCell.rowSpan, 10);
                          rowspanNumber++;
                          currentCell.baseCell.setAttribute('rowSpan', rowspanNumber);
                          break;
                  }
              }
  
              if (position === 'top') {
                  currentTr.before(html);
              } else {
                  var cellHasRowspan = (cell.rowSpan > 1);
                  if (cellHasRowspan) {
                      var lastTrIndex = currentTr[0].rowIndex + (cell.rowSpan - 2);
                      $($(currentTr).parent().find('tr')[lastTrIndex]).after($(html));
                      return;
                  }
                  currentTr.after(html);
              }
          };
  
          /**
           * Add a new col
           *
           * @system {WrappedRange} rng
           * @system {String} position (left/right)
           * @return {Node}
           */
          this.addCol = function (rng, position) {
              var cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
              var row = $(cell).closest('tr');
              var rowsGroup = $(row).siblings();
              rowsGroup.push(row);
  
              var vTable = new TableResultAction(cell, TableResultAction.where.Column,
                  TableResultAction.requestAction.Add, $(row).closest('table')[0]);
              var actions = vTable.getActionList();
  
              for (var actionIndex = 0; actionIndex < actions.length; actionIndex++) {
                  var currentCell = actions[actionIndex];
                  var tdAttributes = this.recoverAttributes(currentCell.baseCell);
                  switch (currentCell.action) {
                      case TableResultAction.resultAction.AddCell:
                          if (position === 'right') {
                              $(currentCell.baseCell).after('<td' + tdAttributes + '>' + dom.blank + '</td>');
                          } else {
                              $(currentCell.baseCell).before('<td' + tdAttributes + '>' + dom.blank + '</td>');
                          }
                          break;
                      case TableResultAction.resultAction.SumSpanCount:
                          if (position === 'right') {
                              var colspanNumber = parseInt(currentCell.baseCell.colSpan, 10);
                              colspanNumber++;
                              currentCell.baseCell.setAttribute('colSpan', colspanNumber);
                          } else {
                              $(currentCell.baseCell).before('<td' + tdAttributes + '>' + dom.blank + '</td>');
                          }
                          break;
                  }
              }
          };
  
          /*
      * Copy attributes from element.
      *
      * @system {object} Element to recover attributes.
      * @return {string} Copied string elements.
      */
          this.recoverAttributes = function (el) {
              var resultStr = '';
  
              if (!el) {
                  return resultStr;
              }
  
              var attrList = el.attributes || [];
  
              for (var i = 0; i < attrList.length; i++) {
                  if (attrList[i].name.toLowerCase() === 'id') {
                      continue;
                  }
  
                  if (attrList[i].specified) {
                      resultStr += ' ' + attrList[i].name + '=\'' + attrList[i].value + '\'';
                  }
              }
  
              return resultStr;
          };
  
          /**
           * Delete current row
           *
           * @system {WrappedRange} rng
           * @return {Node}
           */
          this.deleteRow = function (rng) {
              var cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
              var row = $(cell).closest('tr');
              var cellPos = row.children('td, th').index($(cell));
              var rowPos = row[0].rowIndex;
  
              var vTable = new TableResultAction(cell, TableResultAction.where.Row,
                  TableResultAction.requestAction.Delete, $(row).closest('table')[0]);
              var actions = vTable.getActionList();
  
              for (var actionIndex = 0; actionIndex < actions.length; actionIndex++) {
                  if (!actions[actionIndex]) {
                      continue;
                  }
  
                  var baseCell = actions[actionIndex].baseCell;
                  var virtualPosition = actions[actionIndex].virtualTable;
                  var hasRowspan = (baseCell.rowSpan && baseCell.rowSpan > 1);
                  var rowspanNumber = (hasRowspan) ? parseInt(baseCell.rowSpan, 10) : 0;
                  switch (actions[actionIndex].action) {
                      case TableResultAction.resultAction.Ignore:
                          continue;
                      case TableResultAction.resultAction.AddCell:
                          var nextRow = row.next('tr')[0];
                          if (!nextRow) {
                              continue;
                          }
                          var cloneRow = row[0].cells[cellPos];
                          if (hasRowspan) {
                              if (rowspanNumber > 2) {
                                  rowspanNumber--;
                                  nextRow.insertBefore(cloneRow, nextRow.cells[cellPos]);
                                  nextRow.cells[cellPos].setAttribute('rowSpan', rowspanNumber);
                                  nextRow.cells[cellPos].innerHTML = '';
                              } else if (rowspanNumber === 2) {
                                  nextRow.insertBefore(cloneRow, nextRow.cells[cellPos]);
                                  nextRow.cells[cellPos].removeAttribute('rowSpan');
                                  nextRow.cells[cellPos].innerHTML = '';
                              }
                          }
                          continue;
                      case TableResultAction.resultAction.SubtractSpanCount:
                          if (hasRowspan) {
                              if (rowspanNumber > 2) {
                                  rowspanNumber--;
                                  baseCell.setAttribute('rowSpan', rowspanNumber);
                                  if (virtualPosition.rowIndex !== rowPos && baseCell.cellIndex === cellPos) {
                                      baseCell.innerHTML = '';
                                  }
                              } else if (rowspanNumber === 2) {
                                  baseCell.removeAttribute('rowSpan');
                                  if (virtualPosition.rowIndex !== rowPos && baseCell.cellIndex === cellPos) {
                                      baseCell.innerHTML = '';
                                  }
                              }
                          }
                          continue;
                      case TableResultAction.resultAction.RemoveCell:
                          // Do not need remove cell because row will be deleted.
                          continue;
                  }
              }
              row.remove();
          };
  
          /**
           * Delete current col
           *
           * @system {WrappedRange} rng
           * @return {Node}
           */
          this.deleteCol = function (rng) {
              var cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
              var row = $(cell).closest('tr');
              var cellPos = row.children('td, th').index($(cell));
  
              var vTable = new TableResultAction(cell, TableResultAction.where.Column,
                  TableResultAction.requestAction.Delete, $(row).closest('table')[0]);
              var actions = vTable.getActionList();
  
              for (var actionIndex = 0; actionIndex < actions.length; actionIndex++) {
                  if (!actions[actionIndex]) {
                      continue;
                  }
                  switch (actions[actionIndex].action) {
                      case TableResultAction.resultAction.Ignore:
                          continue;
                      case TableResultAction.resultAction.SubtractSpanCount:
                          var baseCell = actions[actionIndex].baseCell;
                          var hasColspan = (baseCell.colSpan && baseCell.colSpan > 1);
                          if (hasColspan) {
                              var colspanNumber = (baseCell.colSpan) ? parseInt(baseCell.colSpan, 10) : 0;
                              if (colspanNumber > 2) {
                                  colspanNumber--;
                                  baseCell.setAttribute('colSpan', colspanNumber);
                                  if (baseCell.cellIndex === cellPos) {
                                      baseCell.innerHTML = '';
                                  }
                              } else if (colspanNumber === 2) {
                                  baseCell.removeAttribute('colSpan');
                                  if (baseCell.cellIndex === cellPos) {
                                      baseCell.innerHTML = '';
                                  }
                              }
                          }
                          continue;
                      case TableResultAction.resultAction.RemoveCell:
                          dom.remove(actions[actionIndex].baseCell, true);
                          continue;
                  }
              }
          };
  
          /**
           * create empty table element
           *
           * @system {Number} rowCount
           * @system {Number} colCount
           * @return {Node}
           */
          this.createTable = function (colCount, rowCount, options) {
              var tds = [], tdHTML;
              for (var idxCol = 0; idxCol < colCount; idxCol++) {
                  tds.push('<td>' + dom.blank + '</td>');
              }
              tdHTML = tds.join('');
  
              var trs = [], trHTML;
              for (var idxRow = 0; idxRow < rowCount; idxRow++) {
                  trs.push('<tr>' + tdHTML + '</tr>');
              }
              trHTML = trs.join('');
              var $table = $('<table>' + trHTML + '</table>');
              if (options && options.tableClassName) {
                  $table.addClass(options.tableClassName);
              }
  
              return $table[0];
          };
  
          /**
           * Delete current table
           *
           * @system {WrappedRange} rng
           * @return {Node}
           */
          this.deleteTable = function (rng) {
              var cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
              $(cell).closest('table').remove();
          };
      };
  
  
      var KEY_BOGUS = 'bogus';
  
      /**
       * @class Editor
       */
      var Editor = function (context) {
          var self = this;
  
          var $note = context.layoutInfo.note;
          var $editor = context.layoutInfo.editor;
          var $editable = context.layoutInfo.editable;
          var options = context.options;
          var lang = options.langInfo;
  
          var editable = $editable[0];
          var lastRange = null;
  
          var style = new Style();
          var table = new Table();
          var typing = new Typing();
          var bullet = new Bullet();
          var history = new History($editable);
  
          this.initialize = function () {
              // bind custom events
              $editable.on('keydown', function (event) {
                  if (event.keyCode === key.code.ENTER) {
                      context.triggerEvent('enter', event);
                  }
                  context.triggerEvent('keydown', event);
  
                  if (!event.isDefaultPrevented()) {
                      if (options.shortcuts) {
                          self.handleKeyMap(event);
                      } else {
                          self.preventDefaultEditableShortCuts(event);
                      }
                  }
              }).on('keyup', function (event) {
                  context.triggerEvent('keyup', event);
              }).on('focus', function (event) {
                  context.triggerEvent('focus', event);
              }).on('blur', function (event) {
                  context.triggerEvent('blur', event);
              }).on('mousedown', function (event) {
                  context.triggerEvent('mousedown', event);
              }).on('mouseup', function (event) {
                  context.triggerEvent('mouseup', event);
              }).on('scroll', function (event) {
                  context.triggerEvent('scroll', event);
              }).on('paste', function (event) {
                  context.triggerEvent('paste', event);
              });
  
              // init content before set event
              $editable.html(dom.html($note) || dom.emptyPara);
  
              // [workaround] IE doesn't have input events for contentEditable
              // - see: https://goo.gl/4bfIvA
              var changeEventName = agent.isMSIE ? 'DOMCharacterDataModified DOMSubtreeModified DOMNodeInserted' : 'input';
              $editable.on(changeEventName, func.debounce(function () {
                  context.triggerEvent('change', $editable.html());
              }, 100));
  
              $editor.on('focusin', function (event) {
                  context.triggerEvent('focusin', event);
              }).on('focusout', function (event) {
                  context.triggerEvent('focusout', event);
              });
  
              if (!options.airMode) {
                  if (options.width) {
                      $editor.outerWidth(options.width);
                  }
                  if (options.height) {
                      $editable.outerHeight(options.height);
                  }
                  if (options.maxHeight) {
                      $editable.css('max-height', options.maxHeight);
                  }
                  if (options.minHeight) {
                      $editable.css('min-height', options.minHeight);
                  }
              }
  
              history.recordUndo();
          };
  
          this.destroy = function () {
              $editable.off();
          };
  
          this.handleKeyMap = function (event) {
              var keyMap = options.keyMap[agent.isMac ? 'mac' : 'pc'];
              var keys = [];
  
              if (event.metaKey) {
                  keys.push('CMD');
              }
              if (event.ctrlKey && !event.altKey) {
                  keys.push('CTRL');
              }
              if (event.shiftKey) {
                  keys.push('SHIFT');
              }
  
              var keyName = key.nameFromCode[event.keyCode];
              if (keyName) {
                  keys.push(keyName);
              }
  
              var eventName = keyMap[keys.join('+')];
              if (eventName) {
                  event.preventDefault();
                  context.invoke(eventName);
              } else if (key.isEdit(event.keyCode)) {
                  this.afterCommand();
              }
          };
  
          this.preventDefaultEditableShortCuts = function (event) {
              // B(Bold, 66) / I(Italic, 73) / U(Underline, 85)
              if ((event.ctrlKey || event.metaKey) &&
                  list.contains([66, 73, 85], event.keyCode)) {
                  event.preventDefault();
              }
          };
  
          /**
           * create range
           * @return {WrappedRange}
           */
          this.createRange = function () {
              this.focus();
              return range.create(editable);
          };
  
          /**
           * saveRange
           *
           * save current range
           *
           * @system {Boolean} [thenCollapse=false]
           */
          this.saveRange = function (thenCollapse) {
              lastRange = this.createRange();
              if (thenCollapse) {
                  lastRange.collapse().select();
              }
          };
  
          /**
           * restoreRange
           *
           * restore lately range
           */
          this.restoreRange = function () {
              if (lastRange) {
                  lastRange.select();
                  this.focus();
              }
          };
  
          this.saveTarget = function (node) {
              $editable.data('target', node);
          };
  
          this.clearTarget = function () {
              $editable.removeData('target');
          };
  
          this.restoreTarget = function () {
              return $editable.data('target');
          };
  
          /**
           * currentStyle
           *
           * current style
           * @return {Object|Boolean} unfocus
           */
          this.currentStyle = function () {
              var rng = range.create();
              if (rng) {
                  rng = rng.normalize();
              }
              return rng ? style.current(rng) : style.fromNode($editable);
          };
  
          /**
           * style from node
           *
           * @system {jQuery} $node
           * @return {Object}
           */
          this.styleFromNode = function ($node) {
              return style.fromNode($node);
          };
  
          /**
           * undo
           */
          this.undo = function () {
              context.triggerEvent('before.command', $editable.html());
              history.undo();
              context.triggerEvent('change', $editable.html());
          };
          context.memo('help.undo', lang.help.undo);
  
          /**
           * redo
           */
          this.redo = function () {
              context.triggerEvent('before.command', $editable.html());
              history.redo();
              context.triggerEvent('change', $editable.html());
          };
          context.memo('help.redo', lang.help.redo);
  
          /**
           * before command
           */
          var beforeCommand = this.beforeCommand = function () {
              context.triggerEvent('before.command', $editable.html());
              // keep focus on editable before command execution
              self.focus();
          };
  
          /**
           * after command
           * @system {Boolean} isPreventTrigger
           */
          var afterCommand = this.afterCommand = function (isPreventTrigger) {
              history.recordUndo();
              if (!isPreventTrigger) {
                  context.triggerEvent('change', $editable.html());
              }
          };
  
          /* jshint ignore:start */
          // native commands(with execCommand), generate function for execCommand
          var commands = ['bold', 'italic', 'underline', 'strikethrough', 'superscript', 'subscript',
              'justifyLeft', 'justifyCenter', 'justifyRight', 'justifyFull',
              'formatBlock', 'removeFormat',
              'backColor', 'fontName'];
  
          for (var idx = 0, len = commands.length; idx < len; idx++) {
              this[commands[idx]] = (function (sCmd) {
                  return function (value) {
                      beforeCommand();
                      document.execCommand(sCmd, false, value);
                      afterCommand(true);
                  };
              })(commands[idx]);
              context.memo('help.' + commands[idx], lang.help[commands[idx]]);
          }
          /* jshint ignore:end */
  
          /**
           * handle tab key
           */
          this.tab = function () {
              var rng = this.createRange();
              if (rng.isCollapsed() && rng.isOnCell()) {
                  table.tab(rng);
              } else {
                  beforeCommand();
                  typing.insertTab(rng, options.tabSize);
                  afterCommand();
              }
          };
          context.memo('help.tab', lang.help.tab);
  
          /**
           * handle shift+tab key
           */
          this.untab = function () {
              var rng = this.createRange();
              if (rng.isCollapsed() && rng.isOnCell()) {
                  table.tab(rng, true);
              }
          };
          context.memo('help.untab', lang.help.untab);
  
          /**
           * run given function between beforeCommand and afterCommand
           */
          this.wrapCommand = function (fn) {
              return function () {
                  beforeCommand();
                  fn.apply(self, arguments);
                  afterCommand();
              };
          };
  
          /**
           * insert paragraph
           */
          this.insertParagraph = this.wrapCommand(function () {
              typing.insertParagraph(editable);
          });
          context.memo('help.insertParagraph', lang.help.insertParagraph);
  
          this.insertOrderedList = this.wrapCommand(function () {
              bullet.insertOrderedList(editable);
          });
          context.memo('help.insertOrderedList', lang.help.insertOrderedList);
  
          this.insertUnorderedList = this.wrapCommand(function () {
              bullet.insertUnorderedList(editable);
          });
          context.memo('help.insertUnorderedList', lang.help.insertUnorderedList);
  
          this.indent = this.wrapCommand(function () {
              bullet.indent(editable);
          });
          context.memo('help.indent', lang.help.indent);
  
          this.outdent = this.wrapCommand(function () {
              bullet.outdent(editable);
          });
          context.memo('help.outdent', lang.help.outdent);
  
          /**
           * insert image
           *
           * @system {String} src
           * @system {String|Function} param
           * @return {Promise}
           */
          this.insertImage = function (src, param) {
              return async.createImage(src, param).then(function ($image) {
                  beforeCommand();
  
                  if (typeof param === 'function') {
                      param($image);
                  } else {
                      if (typeof param === 'string') {
                          $image.attr('data-filename', param);
                      }
                      $image.css('width', Math.min($editable.width(), $image.width()));
                  }
  
                  $image.show();
                  range.create(editable).insertNode($image[0]);
                  range.createFromNodeAfter($image[0]).select();
                  afterCommand();
              }).fail(function (e) {
                  context.triggerEvent('image.upload.error', e);
              });
          };
  
          /**
           * insertImages
           * @system {File[]} files
           */
          this.insertImages = function (files) {
              $.each(files, function (idx, file) {
                  var filename = file.name;
                  if (options.maximumImageFileSize && options.maximumImageFileSize < file.size) {
                      context.triggerEvent('image.upload.error', lang.image.maximumFileSizeError);
                  } else {
                      async.readFileAsDataURL(file).then(function (dataURL) {
                          return self.insertImage(dataURL, filename);
                      }).fail(function () {
                          context.triggerEvent('image.upload.error');
                      });
                  }
              });
          };
  
          /**
           * insertImagesOrCallback
           * @system {File[]} files
           */
          this.insertImagesOrCallback = function (files) {
              var callbacks = options.callbacks;
  
              // If onImageUpload options setted
              if (callbacks.onImageUpload) {
                  context.triggerEvent('image.upload', files);
                  // else insert Image as dataURL
              } else {
                  this.insertImages(files);
              }
          };
  
          /**
           * insertNode
           * insert node
           * @system {Node} node
           */
          this.insertNode = this.wrapCommand(function (node) {
              var rng = this.createRange();
              rng.insertNode(node);
              range.createFromNodeAfter(node).select();
          });
  
          /**
           * insert text
           * @system {String} text
           */
          this.insertText = this.wrapCommand(function (text) {
              var rng = this.createRange();
              var textNode = rng.insertNode(dom.createText(text));
              range.create(textNode, dom.nodeLength(textNode)).select();
          });
  
          /**
           * return selected plain text
           * @return {String} text
           */
          this.getSelectedText = function () {
              var rng = this.createRange();
  
              // if range on anchor, expand range with anchor
              if (rng.isOnAnchor()) {
                  rng = range.createFromNode(dom.ancestor(rng.sc, dom.isAnchor));
              }
  
              return rng.toString();
          };
  
          /**
           * paste HTML
           * @system {String} markup
           */
          this.pasteHTML = this.wrapCommand(function (markup) {
              var contents = this.createRange().pasteHTML(markup);
              range.createFromNodeAfter(list.last(contents)).select();
          });
  
          /**
           * formatBlock
           *
           * @system {String} tagName
           */
          this.formatBlock = this.wrapCommand(function (tagName, $target) {
              var onApplyCustomStyle = context.options.callbacks.onApplyCustomStyle;
              if (onApplyCustomStyle) {
                  onApplyCustomStyle.call(this, $target, context, this.onFormatBlock);
              } else {
                  this.onFormatBlock(tagName);
              }
          });
  
          this.onFormatBlock = function (tagName) {
              // [workaround] for MSIE, IE need `<`
              tagName = agent.isMSIE ? '<' + tagName + '>' : tagName;
              document.execCommand('FormatBlock', false, tagName);
          };
  
          this.formatPara = function () {
              this.formatBlock('P');
          };
          context.memo('help.formatPara', lang.help.formatPara);
  
          /* jshint ignore:start */
          for (var idx = 1; idx <= 6; idx++) {
              this['formatH' + idx] = function (idx) {
                  return function () {
                      this.formatBlock('H' + idx);
                  };
              }(idx);
              context.memo('help.formatH' + idx, lang.help['formatH' + idx]);
          }
          ;
          /* jshint ignore:end */
  
          /**
           * fontSize
           *
           * @system {String} value - px
           */
          this.fontSize = function (value) {
              var rng = this.createRange();
  
              if (rng && rng.isCollapsed()) {
                  var spans = style.styleNodes(rng);
                  var firstSpan = list.head(spans);
  
                  $(spans).css({
                      'font-size': value + 'px'
                  });
  
                  // [workaround] added styled bogus span for style
                  //  - also bogus character needed for cursor position
                  if (firstSpan && !dom.nodeLength(firstSpan)) {
                      firstSpan.innerHTML = dom.ZERO_WIDTH_NBSP_CHAR;
                      range.createFromNodeAfter(firstSpan.firstChild).select();
                      $editable.data(KEY_BOGUS, firstSpan);
                  }
              } else {
                  beforeCommand();
                  $(style.styleNodes(rng)).css({
                      'font-size': value + 'px'
                  });
                  afterCommand();
              }
          };
  
          /**
           * insert horizontal rule
           */
          this.insertHorizontalRule = this.wrapCommand(function () {
              var hrNode = this.createRange().insertNode(dom.create('HR'));
              if (hrNode.nextSibling) {
                  range.create(hrNode.nextSibling, 0).normalize().select();
              }
          });
          context.memo('help.insertHorizontalRule', lang.help.insertHorizontalRule);
  
          /**
           * remove bogus node and character
           */
          this.removeBogus = function () {
              var bogusNode = $editable.data(KEY_BOGUS);
              if (!bogusNode) {
                  return;
              }
  
              var textNode = list.find(list.from(bogusNode.childNodes), dom.isText);
  
              var bogusCharIdx = textNode.nodeValue.indexOf(dom.ZERO_WIDTH_NBSP_CHAR);
              if (bogusCharIdx !== -1) {
                  textNode.deleteData(bogusCharIdx, 1);
              }
  
              if (dom.isEmpty(bogusNode)) {
                  dom.remove(bogusNode);
              }
  
              $editable.removeData(KEY_BOGUS);
          };
  
          /**
           * lineHeight
           * @system {String} value
           */
          this.lineHeight = this.wrapCommand(function (value) {
              style.stylePara(this.createRange(), {
                  lineHeight: value
              });
          });
  
          /**
           * unlink
           *
           * @type command
           */
          this.unlink = function () {
              var rng = this.createRange();
              if (rng.isOnAnchor()) {
                  var anchor = dom.ancestor(rng.sc, dom.isAnchor);
                  rng = range.createFromNode(anchor);
                  rng.select();
  
                  beforeCommand();
                  document.execCommand('unlink');
                  afterCommand();
              }
          };
  
          /**
           * create link (command)
           *
           * @system {Object} linkInfo
           */
          this.createLink = this.wrapCommand(function (linkInfo) {
              var linkUrl = linkInfo.url;
              var linkText = linkInfo.text;
              var isNewWindow = linkInfo.isNewWindow;
              var rng = linkInfo.range || this.createRange();
              var isTextChanged = rng.toString() !== linkText;
  
              // handle spaced urls from input
              if (typeof linkUrl === 'string') {
                  linkUrl = linkUrl.trim();
              }
  
              if (options.onCreateLink) {
                  linkUrl = options.onCreateLink(linkUrl);
              } else {
                  // if url doesn't match an URL schema, set http:// as default
                  linkUrl = /^[A-Za-z][A-Za-z0-9+-.]*\:[\/\/]?/.test(linkUrl) ?
                      linkUrl : 'http://' + linkUrl;
              }
  
              var anchors = [];
              if (isTextChanged) {
                  rng = rng.deleteContents();
                  var anchor = rng.insertNode($('<A>' + linkText + '</A>')[0]);
                  anchors.push(anchor);
              } else {
                  anchors = style.styleNodes(rng, {
                      nodeName: 'A',
                      expandClosestSibling: true,
                      onlyPartialContains: true
                  });
              }
  
              $.each(anchors, function (idx, anchor) {
                  $(anchor).attr('href', linkUrl);
                  if (isNewWindow) {
                      $(anchor).attr('target', '_blank');
                  } else {
                      $(anchor).removeAttr('target');
                  }
              });
  
              var startRange = range.createFromNodeBefore(list.head(anchors));
              var startPoint = startRange.getStartPoint();
              var endRange = range.createFromNodeAfter(list.last(anchors));
              var endPoint = endRange.getEndPoint();
  
              range.create(
                  startPoint.node,
                  startPoint.offset,
                  endPoint.node,
                  endPoint.offset
              ).select();
          });
  
          /**
           * returns link info
           *
           * @return {Object}
           * @return {WrappedRange} return.range
           * @return {String} return.text
           * @return {Boolean} [return.isNewWindow=true]
           * @return {String} [return.url=""]
           */
          this.getLinkInfo = function () {
              var rng = this.createRange().expand(dom.isAnchor);
  
              // Get the first anchor on range(for edit).
              var $anchor = $(list.head(rng.nodes(dom.isAnchor)));
              var linkInfo = {
                  range: rng,
                  text: rng.toString(),
                  url: $anchor.length ? $anchor.attr('href') : ''
              };
  
              // Define isNewWindow when anchor exists.
              if ($anchor.length) {
                  linkInfo.isNewWindow = $anchor.attr('target') === '_blank';
              }
  
              return linkInfo;
          };
  
          /**
           * setting color
           *
           * @system {Object} sObjColor  color code
           * @system {String} sObjColor.foreColor foreground color
           * @system {String} sObjColor.backColor background color
           */
          this.color = this.wrapCommand(function (colorInfo) {
              var foreColor = colorInfo.foreColor;
              var backColor = colorInfo.backColor;
  
              if (foreColor) {
                  document.execCommand('foreColor', false, foreColor);
              }
              if (backColor) {
                  document.execCommand('backColor', false, backColor);
              }
          });
  
          /**
           * Set foreground color
           *
           * @system {String} colorCode foreground color code
           */
          this.foreColor = this.wrapCommand(function (colorInfo) {
              document.execCommand('styleWithCSS', false, true);
              document.execCommand('foreColor', false, colorInfo);
          });
  
          /**
           * insert Table
           *
           * @system {String} dimension of table (ex : "5x5")
           */
          this.insertTable = this.wrapCommand(function (dim) {
              var dimension = dim.split('x');
  
              var rng = this.createRange().deleteContents();
              rng.insertNode(table.createTable(dimension[0], dimension[1], options));
          });
  
          /**
           * @method addRow
           *
           *
           */
          this.addRow = function (position) {
              var rng = this.createRange($editable);
              if (rng.isCollapsed() && rng.isOnCell()) {
                  beforeCommand();
                  table.addRow(rng, position);
                  afterCommand();
              }
          };
  
          /**
           * @method addCol
           *
           *
           */
          this.addCol = function (position) {
              var rng = this.createRange($editable);
              if (rng.isCollapsed() && rng.isOnCell()) {
                  beforeCommand();
                  table.addCol(rng, position);
                  afterCommand();
              }
          };
  
          /**
           * @method deleteRow
           *
           *
           */
          this.deleteRow = function () {
              var rng = this.createRange($editable);
              if (rng.isCollapsed() && rng.isOnCell()) {
                  beforeCommand();
                  table.deleteRow(rng);
                  afterCommand();
              }
          };
  
          /**
           * @method deleteCol
           *
           *
           */
          this.deleteCol = function () {
              var rng = this.createRange($editable);
              if (rng.isCollapsed() && rng.isOnCell()) {
                  beforeCommand();
                  table.deleteCol(rng);
                  afterCommand();
              }
          };
  
          /**
           * @method deleteTable
           *
           *
           */
          this.deleteTable = function () {
              var rng = this.createRange($editable);
              if (rng.isCollapsed() && rng.isOnCell()) {
                  beforeCommand();
                  table.deleteTable(rng);
                  afterCommand();
              }
          };
  
          /**
           * float me
           *
           * @system {String} value
           */
          this.floatMe = this.wrapCommand(function (value) {
              var $target = $(this.restoreTarget());
              $target.toggleClass('note-float-left', value === 'left');
              $target.toggleClass('note-float-right', value === 'right');
              $target.css('float', value);
          });
  
          /**
           * resize overlay element
           * @system {String} value
           */
          this.resize = this.wrapCommand(function (value) {
              var $target = $(this.restoreTarget());
              $target.css({
                  width: value * 100 + '%',
                  height: ''
              });
          });
  
          /**
           * @system {Position} pos
           * @system {jQuery} $target - target element
           * @system {Boolean} [bKeepRatio] - keep ratio
           */
          this.resizeTo = function (pos, $target, bKeepRatio) {
              var imageSize;
              if (bKeepRatio) {
                  var newRatio = pos.y / pos.x;
                  var ratio = $target.data('ratio');
                  imageSize = {
                      width: ratio > newRatio ? pos.x : pos.y / ratio,
                      height: ratio > newRatio ? pos.x * ratio : pos.y
                  };
              } else {
                  imageSize = {
                      width: pos.x,
                      height: pos.y
                  };
              }
  
              $target.css(imageSize);
          };
  
          /**
           * remove media object
           */
          this.removeMedia = this.wrapCommand(function () {
              var $target = $(this.restoreTarget()).detach();
              context.triggerEvent('media.delete', $target, $editable);
          });
  
          /**
           * returns whether editable area has focus or not.
           */
          this.hasFocus = function () {
              return $editable.is(':focus');
          };
  
          /**
           * set focus
           */
          this.focus = function () {
              // [workaround] Screen will move when page is scolled in IE.
              //  - do focus when not focused
              if (!this.hasFocus()) {
                  $editable.focus();
              }
          };
  
          /**
           * returns whether contents is empty or not.
           * @return {Boolean}
           */
          this.isEmpty = function () {
              return dom.isEmpty($editable[0]) || dom.emptyPara === $editable.html();
          };
  
          /**
           * Removes all contents and restores the editable instance to an _emptyPara_.
           */
          this.empty = function () {
              context.invoke('code', dom.emptyPara);
          };
      };
  
      var Clipboard = function (context) {
          var self = this;
  
          var $editable = context.layoutInfo.editable;
  
          this.events = {
              'summernote.keydown': function (we, e) {
                  if (self.needKeydownHook()) {
                      if ((e.ctrlKey || e.metaKey) && e.keyCode === key.code.V) {
                          context.invoke('editor.saveRange');
                          self.$paste.focus();
  
                          setTimeout(function () {
                              self.pasteByHook();
                          }, 0);
                      }
                  }
              }
          };
  
          this.needKeydownHook = function () {
              return (agent.isMSIE && agent.browserVersion > 10) || agent.isFF;
          };
  
          this.initialize = function () {
              // [workaround] getting image from clipboard
              //  - IE11 and Firefox: CTRL+v hook
              //  - Webkit: event.clipboardData
              if (this.needKeydownHook()) {
                  this.$paste = $('<div tabindex="-1" />').attr('contenteditable', true).css({
                      position: 'absolute',
                      left: -100000,
                      opacity: 0
                  });
                  $editable.before(this.$paste);
  
                  this.$paste.on('paste', function (event) {
                      context.triggerEvent('paste', event);
                  });
              } else {
                  $editable.on('paste', this.pasteByEvent);
              }
          };
  
          this.destroy = function () {
              if (this.needKeydownHook()) {
                  this.$paste.remove();
                  this.$paste = null;
              }
          };
  
          this.pasteByHook = function () {
              var node = this.$paste[0].firstChild;
  
              var src = node && node.src;
              if (dom.isImg(node) && src.indexOf('data:') === 0) {
                  var decodedData = atob(node.src.split(',')[1]);
                  var array = new Uint8Array(decodedData.length);
                  for (var i = 0; i < decodedData.length; i++) {
                      array[i] = decodedData.charCodeAt(i);
                  }
  
                  var blob = new Blob([array], {type: 'image/png'});
                  blob.name = 'clipboard.png';
  
                  context.invoke('editor.restoreRange');
                  context.invoke('editor.focus');
                  context.invoke('editor.insertImagesOrCallback', [blob]);
              } else {
                  var pasteContent = $('<div />').html(this.$paste.html()).html();
                  context.invoke('editor.restoreRange');
                  context.invoke('editor.focus');
  
                  if (pasteContent) {
                      context.invoke('editor.pasteHTML', pasteContent);
                  }
              }
  
              this.$paste.empty();
          };
  
          /**
           * paste by clipboard event
           *
           * @system {Event} event
           */
          this.pasteByEvent = function (event) {
              var clipboardData = event.originalEvent.clipboardData;
              if (clipboardData && clipboardData.items && clipboardData.items.length) {
                  var item = list.head(clipboardData.items);
                  if (item.kind === 'file' && item.type.indexOf('image/') !== -1) {
                      context.invoke('editor.insertImagesOrCallback', [item.getAsFile()]);
                  }
                  context.invoke('editor.afterCommand');
              }
          };
      };
  
      var Dropzone = function (context) {
          var $document = $(document);
          var $editor = context.layoutInfo.editor;
          var $editable = context.layoutInfo.editable;
          var options = context.options;
          var lang = options.langInfo;
          var documentEventHandlers = {};
  
          var $dropzone = $([
              '<div class="note-dropzone">',
              '  <div class="note-dropzone-message"/>',
              '</div>'
          ].join('')).prependTo($editor);
  
          var detachDocumentEvent = function () {
              Object.keys(documentEventHandlers).forEach(function (key) {
                  $document.off(key.substr(2).toLowerCase(), documentEventHandlers[key]);
              });
              documentEventHandlers = {};
          };
  
          /**
           * attach Drag and Drop Events
           */
          this.initialize = function () {
              if (options.disableDragAndDrop) {
                  // prevent default drop event
                  documentEventHandlers.onDrop = function (e) {
                      e.preventDefault();
                  };
                  $document.on('drop', documentEventHandlers.onDrop);
              } else {
                  this.attachDragAndDropEvent();
              }
          };
  
          /**
           * attach Drag and Drop Events
           */
          this.attachDragAndDropEvent = function () {
              var collection = $(),
                  $dropzoneMessage = $dropzone.find('.note-dropzone-message');
  
              documentEventHandlers.onDragenter = function (e) {
                  var isCodeview = context.invoke('codeview.isActivated');
                  var hasEditorSize = $editor.width() > 0 && $editor.height() > 0;
                  if (!isCodeview && !collection.length && hasEditorSize) {
                      $editor.addClass('dragover');
                      $dropzone.width($editor.width());
                      $dropzone.height($editor.height());
                      $dropzoneMessage.text(lang.image.dragImageHere);
                  }
                  collection = collection.add(e.target);
              };
  
              documentEventHandlers.onDragleave = function (e) {
                  collection = collection.not(e.target);
                  if (!collection.length) {
                      $editor.removeClass('dragover');
                  }
              };
  
              documentEventHandlers.onDrop = function () {
                  collection = $();
                  $editor.removeClass('dragover');
              };
  
              // show dropzone on dragenter when dragging a object to document
              // -but only if the editor is visible, i.e. has a positive width and height
              $document.on('dragenter', documentEventHandlers.onDragenter)
                  .on('dragleave', documentEventHandlers.onDragleave)
                  .on('drop', documentEventHandlers.onDrop);
  
              // change dropzone's message on hover.
              $dropzone.on('dragenter', function () {
                  $dropzone.addClass('hover');
                  $dropzoneMessage.text(lang.image.dropImage);
              }).on('dragleave', function () {
                  $dropzone.removeClass('hover');
                  $dropzoneMessage.text(lang.image.dragImageHere);
              });
  
              // attach dropImage
              $dropzone.on('drop', function (event) {
                  var dataTransfer = event.originalEvent.dataTransfer;
  
                  if (dataTransfer && dataTransfer.files && dataTransfer.files.length) {
                      event.preventDefault();
                      $editable.focus();
                      context.invoke('editor.insertImagesOrCallback', dataTransfer.files);
                  } else {
                      $.each(dataTransfer.types, function (idx, type) {
                          var content = dataTransfer.getData(type);
  
                          if (type.toLowerCase().indexOf('text') > -1) {
                              context.invoke('editor.pasteHTML', content);
                          } else {
                              $(content).each(function () {
                                  context.invoke('editor.insertNode', this);
                              });
                          }
                      });
                  }
              }).on('dragover', false); // prevent default dragover event
          };
  
          this.destroy = function () {
              detachDocumentEvent();
          };
      };
  
  
      var CodeMirror;
      if (agent.hasCodeMirror) {
          if (agent.isSupportAmd) {
              require(['codemirror'], function (cm) {
                  CodeMirror = cm;
              });
          } else {
              CodeMirror = window.CodeMirror;
          }
      }
  
      /**
       * @class Codeview
       */
      var Codeview = function (context) {
          var $editor = context.layoutInfo.editor;
          var $editable = context.layoutInfo.editable;
          var $codable = context.layoutInfo.codable;
          var options = context.options;
  
          this.sync = function () {
              var isCodeview = this.isActivated();
              if (isCodeview && agent.hasCodeMirror) {
                  $codable.data('cmEditor').save();
              }
          };
  
          /**
           * @return {Boolean}
           */
          this.isActivated = function () {
              return $editor.hasClass('codeview');
          };
  
          /**
           * toggle codeview
           */
          this.toggle = function () {
              if (this.isActivated()) {
                  this.deactivate();
              } else {
                  this.activate();
              }
              context.triggerEvent('codeview.toggled');
          };
  
          /**
           * activate code view
           */
          this.activate = function () {
              $codable.val(dom.html($editable, options.prettifyHtml));
              $codable.height($editable.height());
  
              context.invoke('toolbar.updateCodeview', true);
              $editor.addClass('codeview');
              $codable.focus();
  
              // activate CodeMirror as codable
              if (agent.hasCodeMirror) {
                  var cmEditor = CodeMirror.fromTextArea($codable[0], options.codemirror);
  
                  // CodeMirror TernServer
                  if (options.codemirror.tern) {
                      var server = new CodeMirror.TernServer(options.codemirror.tern);
                      cmEditor.ternServer = server;
                      cmEditor.on('cursorActivity', function (cm) {
                          server.updateArgHints(cm);
                      });
                  }
  
                  // CodeMirror hasn't Padding.
                  cmEditor.setSize(null, $editable.outerHeight());
                  $codable.data('cmEditor', cmEditor);
              }
          };
  
          /**
           * deactivate code view
           */
          this.deactivate = function () {
              // deactivate CodeMirror as codable
              if (agent.hasCodeMirror) {
                  var cmEditor = $codable.data('cmEditor');
                  $codable.val(cmEditor.getValue());
                  cmEditor.toTextArea();
              }
  
              var value = dom.value($codable, options.prettifyHtml) || dom.emptyPara;
              var isChange = $editable.html() !== value;
  
              $editable.html(value);
              $editable.height(options.height ? $codable.height() : 'auto');
              $editor.removeClass('codeview');
  
              if (isChange) {
                  context.triggerEvent('change', $editable.html(), $editable);
              }
  
              $editable.focus();
  
              context.invoke('toolbar.updateCodeview', false);
          };
  
          this.destroy = function () {
              if (this.isActivated()) {
                  this.deactivate();
              }
          };
      };
  
      var EDITABLE_PADDING = 24;
  
      var Statusbar = function (context) {
          var $document = $(document);
          var $statusbar = context.layoutInfo.statusbar;
          var $editable = context.layoutInfo.editable;
          var options = context.options;
  
          this.initialize = function () {
              if (options.airMode || options.disableResizeEditor) {
                  this.destroy();
                  return;
              }
  
              $statusbar.on('mousedown', function (event) {
                  event.preventDefault();
                  event.stopPropagation();
  
                  var editableTop = $editable.offset().top - $document.scrollTop();
                  var onMouseMove = function (event) {
                      var height = event.clientY - (editableTop + EDITABLE_PADDING);
  
                      height = (options.minheight > 0) ? Math.max(height, options.minheight) : height;
                      height = (options.maxHeight > 0) ? Math.min(height, options.maxHeight) : height;
  
                      $editable.height(height);
                  };
  
                  $document
                      .on('mousemove', onMouseMove)
                      .one('mouseup', function () {
                          $document.off('mousemove', onMouseMove);
                      });
              });
          };
  
          this.destroy = function () {
              $statusbar.off();
              $statusbar.remove();
          };
      };
  
      var Fullscreen = function (context) {
          var self = this;
          var $editor = context.layoutInfo.editor;
          var $toolbar = context.layoutInfo.toolbar;
          var $editable = context.layoutInfo.editable;
          var $codable = context.layoutInfo.codable;
  
          var $window = $(window);
          var $scrollbar = $('html, body');
  
          this.resizeTo = function (size) {
              $editable.css('height', size.h);
              $codable.css('height', size.h);
              if ($codable.data('cmeditor')) {
                  $codable.data('cmeditor').setsize(null, size.h);
              }
          };
  
          this.onResize = function () {
              self.resizeTo({
                  h: $window.height() - $toolbar.outerHeight()
              });
          };
  
          /**
           * toggle fullscreen
           */
          this.toggle = function () {
              $editor.toggleClass('fullscreen');
              if (this.isFullscreen()) {
                  $editable.data('orgHeight', $editable.css('height'));
                  $window.on('resize', this.onResize).trigger('resize');
                  $scrollbar.css('overflow', 'hidden');
              } else {
                  $window.off('resize', this.onResize);
                  this.resizeTo({h: $editable.data('orgHeight')});
                  $scrollbar.css('overflow', 'visible');
              }
  
              context.invoke('toolbar.updateFullscreen', this.isFullscreen());
          };
  
          this.isFullscreen = function () {
              return $editor.hasClass('fullscreen');
          };
      };
  
      var Handle = function (context) {
          var self = this;
  
          var $document = $(document);
          var $editingArea = context.layoutInfo.editingArea;
          var options = context.options;
  
          this.events = {
              'summernote.mousedown': function (we, e) {
                  if (self.update(e.target)) {
                      e.preventDefault();
                  }
              },
              'summernote.keyup summernote.scroll summernote.change summernote.dialog.shown': function () {
                  self.update();
              },
              'summernote.disable': function () {
                  self.hide();
              },
              'summernote.codeview.toggled': function () {
                  self.update();
              }
          };
  
          this.initialize = function () {
              this.$handle = $([
                  '<div class="note-handle">',
                  '<div class="note-control-selection">',
                  '<div class="note-control-selection-bg"></div>',
                  '<div class="note-control-holder note-control-nw"></div>',
                  '<div class="note-control-holder note-control-ne"></div>',
                  '<div class="note-control-holder note-control-sw"></div>',
                  '<div class="',
                  (options.disableResizeImage ? 'note-control-holder' : 'note-control-sizing'),
                  ' note-control-se"></div>',
                  (options.disableResizeImage ? '' : '<div class="note-control-selection-info"></div>'),
                  '</div>',
                  '</div>'
              ].join('')).prependTo($editingArea);
  
              this.$handle.on('mousedown', function (event) {
                  if (dom.isControlSizing(event.target)) {
                      event.preventDefault();
                      event.stopPropagation();
  
                      var $target = self.$handle.find('.note-control-selection').data('target'),
                          posStart = $target.offset(),
                          scrollTop = $document.scrollTop();
  
                      var onMouseMove = function (event) {
                          context.invoke('editor.resizeTo', {
                              x: event.clientX - posStart.left,
                              y: event.clientY - (posStart.top - scrollTop)
                          }, $target, !event.shiftKey);
  
                          self.update($target[0]);
                      };
  
                      $document
                          .on('mousemove', onMouseMove)
                          .one('mouseup', function (e) {
                              e.preventDefault();
                              $document.off('mousemove', onMouseMove);
                              context.invoke('editor.afterCommand');
                          });
  
                      if (!$target.data('ratio')) { // original ratio.
                          $target.data('ratio', $target.height() / $target.width());
                      }
                  }
              });
  
              // Listen for scrolling on the handle overlay.
              this.$handle.on('wheel', function (e) {
                  e.preventDefault();
                  self.update();
              });
          };
  
          this.destroy = function () {
              this.$handle.remove();
          };
  
          this.update = function (target) {
              if (context.isDisabled()) {
                  return false;
              }
  
              var isImage = dom.isImg(target);
              var $selection = this.$handle.find('.note-control-selection');
  
              context.invoke('imagePopover.update', target);
  
              if (isImage) {
                  var $image = $(target);
                  var position = $image.position();
                  var pos = {
                      left: position.left + parseInt($image.css('marginLeft'), 10),
                      top: position.top + parseInt($image.css('marginTop'), 10)
                  };
  
                  // exclude margin
                  var imageSize = {
                      w: $image.outerWidth(false),
                      h: $image.outerHeight(false)
                  };
  
                  $selection.css({
                      display: 'block',
                      left: pos.left,
                      top: pos.top,
                      width: imageSize.w,
                      height: imageSize.h
                  }).data('target', $image); // save current image element.
  
                  var sizingText = imageSize.w + 'x' + imageSize.h;
                  $selection.find('.note-control-selection-info').text(sizingText);
                  context.invoke('editor.saveTarget', target);
              } else {
                  this.hide();
              }
  
              return isImage;
          };
  
          /**
           * hide
           *
           * @system {jQuery} $handle
           */
          this.hide = function () {
              context.invoke('editor.clearTarget');
              this.$handle.children().hide();
          };
      };
  
      var AutoLink = function (context) {
          var self = this;
          var defaultScheme = 'http://';
          var linkPattern = /^([A-Za-z][A-Za-z0-9+-.]*\:[\/\/]?|mailto:[A-Z0-9._%+-]+@)?(www\.)?(.+)$/i;
  
          this.events = {
              'summernote.keyup': function (we, e) {
                  if (!e.isDefaultPrevented()) {
                      self.handleKeyup(e);
                  }
              },
              'summernote.keydown': function (we, e) {
                  self.handleKeydown(e);
              }
          };
  
          this.initialize = function () {
              this.lastWordRange = null;
          };
  
          this.destroy = function () {
              this.lastWordRange = null;
          };
  
          this.replace = function () {
              if (!this.lastWordRange) {
                  return;
              }
  
              var keyword = this.lastWordRange.toString();
              var match = keyword.match(linkPattern);
  
              if (match && (match[1] || match[2])) {
                  var link = match[1] ? keyword : defaultScheme + keyword;
                  var node = $('<a />').html(keyword).attr('href', link)[0];
  
                  this.lastWordRange.insertNode(node);
                  this.lastWordRange = null;
                  context.invoke('editor.focus');
              }
  
          };
  
          this.handleKeydown = function (e) {
              if (list.contains([key.code.ENTER, key.code.SPACE], e.keyCode)) {
                  var wordRange = context.invoke('editor.createRange').getWordRange();
                  this.lastWordRange = wordRange;
              }
          };
  
          this.handleKeyup = function (e) {
              if (list.contains([key.code.ENTER, key.code.SPACE], e.keyCode)) {
                  this.replace();
              }
          };
      };
  
      /**
       * textarea auto sync.
       */
      var AutoSync = function (context) {
          var $note = context.layoutInfo.note;
  
          this.events = {
              'summernote.change': function () {
                  $note.val(context.invoke('code'));
              }
          };
  
          this.shouldInitialize = function () {
              return dom.isTextarea($note[0]);
          };
      };
  
      var Placeholder = function (context) {
          var self = this;
          var $editingArea = context.layoutInfo.editingArea;
          var options = context.options;
  
          this.events = {
              'summernote.init summernote.change': function () {
                  self.update();
              },
              'summernote.codeview.toggled': function () {
                  self.update();
              }
          };
  
          this.shouldInitialize = function () {
              return !!options.placeholder;
          };
  
          this.initialize = function () {
              this.$placeholder = $('<div class="note-placeholder">');
              this.$placeholder.on('click', function () {
                  context.invoke('focus');
              }).text(options.placeholder).prependTo($editingArea);
  
              this.update();
          };
  
          this.destroy = function () {
              this.$placeholder.remove();
          };
  
          this.update = function () {
              var isShow = !context.invoke('codeview.isActivated') && context.invoke('editor.isEmpty');
              this.$placeholder.toggle(isShow);
          };
      };
  
      var Buttons = function (context) {
          var self = this;
          var ui = $.summernote.ui;
  
          var $toolbar = context.layoutInfo.toolbar;
          var options = context.options;
          var lang = options.langInfo;
  
          var invertedKeyMap = func.invertObject(options.keyMap[agent.isMac ? 'mac' : 'pc']);
  
          var representShortcut = this.representShortcut = function (editorMethod) {
              var shortcut = invertedKeyMap[editorMethod];
              if (!options.shortcuts || !shortcut) {
                  return '';
              }
  
              if (agent.isMac) {
                  shortcut = shortcut.replace('CMD', '⌘').replace('SHIFT', '⇧');
              }
  
              shortcut = shortcut.replace('BACKSLASH', '\\')
                  .replace('SLASH', '/')
                  .replace('LEFTBRACKET', '[')
                  .replace('RIGHTBRACKET', ']');
  
              return ' (' + shortcut + ')';
          };
  
          this.initialize = function () {
              this.addToolbarButtons();
              this.addImagePopoverButtons();
              this.addLinkPopoverButtons();
              this.addTablePopoverButtons();
              this.fontInstalledMap = {};
          };
  
          this.destroy = function () {
              delete this.fontInstalledMap;
          };
  
          this.isFontInstalled = function (name) {
              if (!self.fontInstalledMap.hasOwnProperty(name)) {
                  self.fontInstalledMap[name] = agent.isFontInstalled(name) ||
                      list.contains(options.fontNamesIgnoreCheck, name);
              }
  
              return self.fontInstalledMap[name];
          };
  
          this.addToolbarButtons = function () {
              context.memo('button.style', function () {
                  return ui.buttonGroup([
                      ui.button({
                          className: 'dropdown-toggle',
                          contents: ui.dropdownButtonContents(ui.icon(options.icons.magic), options),
                          tooltip: lang.style.style,
                          data: {
                              toggle: 'dropdown'
                          }
                      }),
                      ui.dropdown({
                          className: 'dropdown-style',
                          items: context.options.styleTags,
                          template: function (item) {
  
                              if (typeof item === 'string') {
                                  item = {tag: item, title: (lang.style.hasOwnProperty(item) ? lang.style[item] : item)};
                              }
  
                              var tag = item.tag;
                              var title = item.title;
                              var style = item.style ? ' style="' + item.style + '" ' : '';
                              var className = item.className ? ' class="' + item.className + '"' : '';
  
                              return '<' + tag + style + className + '>' + title + '</' + tag + '>';
                          },
                          click: context.createInvokeHandler('editor.formatBlock')
                      })
                  ]).render();
              });
  
              context.memo('button.bold', function () {
                  return ui.button({
                      className: 'note-btn-bold',
                      contents: ui.icon(options.icons.bold),
                      tooltip: lang.font.bold + representShortcut('bold'),
                      click: context.createInvokeHandlerAndUpdateState('editor.bold')
                  }).render();
              });
  
              context.memo('button.italic', function () {
                  return ui.button({
                      className: 'note-btn-italic',
                      contents: ui.icon(options.icons.italic),
                      tooltip: lang.font.italic + representShortcut('italic'),
                      click: context.createInvokeHandlerAndUpdateState('editor.italic')
                  }).render();
              });
  
              context.memo('button.underline', function () {
                  return ui.button({
                      className: 'note-btn-underline',
                      contents: ui.icon(options.icons.underline),
                      tooltip: lang.font.underline + representShortcut('underline'),
                      click: context.createInvokeHandlerAndUpdateState('editor.underline')
                  }).render();
              });
  
              context.memo('button.clear', function () {
                  return ui.button({
                      contents: ui.icon(options.icons.eraser),
                      tooltip: lang.font.clear + representShortcut('removeFormat'),
                      click: context.createInvokeHandler('editor.removeFormat')
                  }).render();
              });
  
              context.memo('button.strikethrough', function () {
                  return ui.button({
                      className: 'note-btn-strikethrough',
                      contents: ui.icon(options.icons.strikethrough),
                      tooltip: lang.font.strikethrough + representShortcut('strikethrough'),
                      click: context.createInvokeHandlerAndUpdateState('editor.strikethrough')
                  }).render();
              });
  
              context.memo('button.superscript', function () {
                  return ui.button({
                      className: 'note-btn-superscript',
                      contents: ui.icon(options.icons.superscript),
                      tooltip: lang.font.superscript,
                      click: context.createInvokeHandlerAndUpdateState('editor.superscript')
                  }).render();
              });
  
              context.memo('button.subscript', function () {
                  return ui.button({
                      className: 'note-btn-subscript',
                      contents: ui.icon(options.icons.subscript),
                      tooltip: lang.font.subscript,
                      click: context.createInvokeHandlerAndUpdateState('editor.subscript')
                  }).render();
              });
  
              context.memo('button.fontname', function () {
                  return ui.buttonGroup([
                      ui.button({
                          className: 'dropdown-toggle',
                          contents: ui.dropdownButtonContents('<span class="note-current-fontname"/>', options),
                          tooltip: lang.font.name,
                          data: {
                              toggle: 'dropdown'
                          }
                      }),
                      ui.dropdownCheck({
                          className: 'dropdown-fontname',
                          checkClassName: options.icons.menuCheck,
                          items: options.fontNames.filter(self.isFontInstalled),
                          template: function (item) {
                              return '<span style="font-family:' + item + '">' + item + '</span>';
                          },
                          click: context.createInvokeHandlerAndUpdateState('editor.fontName')
                      })
                  ]).render();
              });
  
              context.memo('button.fontsize', function () {
                  return ui.buttonGroup([
                      ui.button({
                          className: 'dropdown-toggle',
                          contents: ui.dropdownButtonContents('<span class="note-current-fontsize"/>', options),
                          tooltip: lang.font.size,
                          data: {
                              toggle: 'dropdown'
                          }
                      }),
                      ui.dropdownCheck({
                          className: 'dropdown-fontsize',
                          checkClassName: options.icons.menuCheck,
                          items: options.fontSizes,
                          click: context.createInvokeHandlerAndUpdateState('editor.fontSize')
                      })
                  ]).render();
              });
  
              context.memo('button.color', function () {
                  return ui.buttonGroup({
                      className: 'note-color',
                      children: [
                          ui.button({
                              className: 'note-current-color-button',
                              contents: ui.icon(options.icons.font + ' note-recent-color'),
                              tooltip: lang.color.recent,
                              click: function (e) {
                                  var $button = $(e.currentTarget);
                                  context.invoke('editor.color', {
                                      backColor: $button.attr('data-backColor'),
                                      foreColor: $button.attr('data-foreColor')
                                  });
                              },
                              callback: function ($button) {
                                  var $recentColor = $button.find('.note-recent-color');
                                  $recentColor.css('background-color', '#FFFF00');
                                  $button.attr('data-backColor', '#FFFF00');
                              }
                          }),
                          ui.button({
                              className: 'dropdown-toggle',
                              contents: ui.dropdownButtonContents('', options),
                              tooltip: lang.color.more,
                              data: {
                                  toggle: 'dropdown'
                              }
                          }),
                          ui.dropdown({
                              items: [
                                  '<div class="note-palette">',
                                  '  <div class="note-palette-title">' + lang.color.background + '</div>',
                                  '  <div>',
                                  '    <button type="button" class="note-color-reset btn btn-light" data-event="backColor" data-value="inherit">',
                                  lang.color.transparent,
                                  '    </button>',
                                  '  </div>',
                                  '  <div class="note-holder" data-event="backColor"/>',
                                  '</div>',
                                  '<div class="note-palette">',
                                  '  <div class="note-palette-title">' + lang.color.foreground + '</div>',
                                  '  <div>',
                                  '    <button type="button" class="note-color-reset btn btn-light" data-event="removeFormat" data-value="foreColor">',
                                  lang.color.resetToDefault,
                                  '    </button>',
                                  '  </div>',
                                  '  <div class="note-holder" data-event="foreColor"/>',
                                  '</div>'
                              ].join(''),
                              callback: function ($dropdown) {
                                  $dropdown.find('.note-holder').each(function () {
                                      var $holder = $(this);
                                      $holder.append(ui.palette({
                                          colors: options.colors,
                                          eventName: $holder.data('event'),
                                          tooltip: options.tooltip
                                      }).render());
                                  });
                              },
                              click: function (event) {
                                  var $button = $(event.target);
                                  var eventName = $button.data('event');
                                  var value = $button.data('value');
  
                                  if (eventName && value) {
                                      var key = eventName === 'backColor' ? 'background-color' : 'color';
                                      var $color = $button.closest('.note-color').find('.note-recent-color');
                                      var $currentButton = $button.closest('.note-color').find('.note-current-color-button');
  
                                      $color.css(key, value);
                                      $currentButton.attr('data-' + eventName, value);
                                      context.invoke('editor.' + eventName, value);
                                  }
                              }
                          })
                      ]
                  }).render();
              });
  
              context.memo('button.ul', function () {
                  return ui.button({
                      contents: ui.icon(options.icons.unorderedlist),
                      tooltip: lang.lists.unordered + representShortcut('insertUnorderedList'),
                      click: context.createInvokeHandler('editor.insertUnorderedList')
                  }).render();
              });
  
              context.memo('button.ol', function () {
                  return ui.button({
                      contents: ui.icon(options.icons.orderedlist),
                      tooltip: lang.lists.ordered + representShortcut('insertOrderedList'),
                      click: context.createInvokeHandler('editor.insertOrderedList')
                  }).render();
              });
  
              var justifyLeft = ui.button({
                  contents: ui.icon(options.icons.alignLeft),
                  tooltip: lang.paragraph.left + representShortcut('justifyLeft'),
                  click: context.createInvokeHandler('editor.justifyLeft')
              });
  
              var justifyCenter = ui.button({
                  contents: ui.icon(options.icons.alignCenter),
                  tooltip: lang.paragraph.center + representShortcut('justifyCenter'),
                  click: context.createInvokeHandler('editor.justifyCenter')
              });
  
              var justifyRight = ui.button({
                  contents: ui.icon(options.icons.alignRight),
                  tooltip: lang.paragraph.right + representShortcut('justifyRight'),
                  click: context.createInvokeHandler('editor.justifyRight')
              });
  
              var justifyFull = ui.button({
                  contents: ui.icon(options.icons.alignJustify),
                  tooltip: lang.paragraph.justify + representShortcut('justifyFull'),
                  click: context.createInvokeHandler('editor.justifyFull')
              });
  
              var outdent = ui.button({
                  contents: ui.icon(options.icons.outdent),
                  tooltip: lang.paragraph.outdent + representShortcut('outdent'),
                  click: context.createInvokeHandler('editor.outdent')
              });
  
              var indent = ui.button({
                  contents: ui.icon(options.icons.indent),
                  tooltip: lang.paragraph.indent + representShortcut('indent'),
                  click: context.createInvokeHandler('editor.indent')
              });
  
              context.memo('button.justifyLeft', func.invoke(justifyLeft, 'render'));
              context.memo('button.justifyCenter', func.invoke(justifyCenter, 'render'));
              context.memo('button.justifyRight', func.invoke(justifyRight, 'render'));
              context.memo('button.justifyFull', func.invoke(justifyFull, 'render'));
              context.memo('button.outdent', func.invoke(outdent, 'render'));
              context.memo('button.indent', func.invoke(indent, 'render'));
  
              context.memo('button.paragraph', function () {
                  return ui.buttonGroup([
                      ui.button({
                          className: 'dropdown-toggle',
                          contents: ui.dropdownButtonContents(ui.icon(options.icons.alignLeft), options),
                          tooltip: lang.paragraph.paragraph,
                          data: {
                              toggle: 'dropdown'
                          }
                      }),
                      ui.dropdown([
                          ui.buttonGroup({
                              className: 'note-align',
                              children: [justifyLeft, justifyCenter, justifyRight, justifyFull]
                          }),
                          ui.buttonGroup({
                              className: 'note-list',
                              children: [outdent, indent]
                          })
                      ])
                  ]).render();
              });
  
              context.memo('button.height', function () {
                  return ui.buttonGroup([
                      ui.button({
                          className: 'dropdown-toggle',
                          contents: ui.dropdownButtonContents(ui.icon(options.icons.textHeight), options),
                          tooltip: lang.font.height,
                          data: {
                              toggle: 'dropdown'
                          }
                      }),
                      ui.dropdownCheck({
                          items: options.lineHeights,
                          checkClassName: options.icons.menuCheck,
                          className: 'dropdown-line-height',
                          click: context.createInvokeHandler('editor.lineHeight')
                      })
                  ]).render();
              });
  
              context.memo('button.table', function () {
                  return ui.buttonGroup([
                      ui.button({
                          className: 'dropdown-toggle',
                          contents: ui.dropdownButtonContents(ui.icon(options.icons.table), options),
                          tooltip: lang.table.table,
                          data: {
                              toggle: 'dropdown'
                          }
                      }),
                      ui.dropdown({
                          className: 'note-table',
                          items: [
                              '<div class="note-dimension-picker">',
                              '  <div class="note-dimension-picker-mousecatcher" data-event="insertTable" data-value="1x1"/>',
                              '  <div class="note-dimension-picker-highlighted"/>',
                              '  <div class="note-dimension-picker-unhighlighted"/>',
                              '</div>',
                              '<div class="note-dimension-display">1 x 1</div>'
                          ].join('')
                      })
                  ], {
                      callback: function ($node) {
                          var $catcher = $node.find('.note-dimension-picker-mousecatcher');
                          $catcher.css({
                              width: options.insertTableMaxSize.col + 'em',
                              height: options.insertTableMaxSize.row + 'em'
                          }).mousedown(context.createInvokeHandler('editor.insertTable'))
                              .on('mousemove', self.tableMoveHandler);
                      }
                  }).render();
              });
  
              context.memo('button.link', function () {
                  return ui.button({
                      contents: ui.icon(options.icons.link),
                      tooltip: lang.link.link + representShortcut('linkDialog.show'),
                      click: context.createInvokeHandler('linkDialog.show')
                  }).render();
              });
  
              context.memo('button.picture', function () {
                  return ui.button({
                      contents: ui.icon(options.icons.picture),
                      tooltip: lang.image.image,
                      click: context.createInvokeHandler('imageDialog.show')
                  }).render();
              });
  
              context.memo('button.video', function () {
                  return ui.button({
                      contents: ui.icon(options.icons.video),
                      tooltip: lang.video.video,
                      click: context.createInvokeHandler('videoDialog.show')
                  }).render();
              });
  
              context.memo('button.hr', function () {
                  return ui.button({
                      contents: ui.icon(options.icons.minus),
                      tooltip: lang.hr.insert + representShortcut('insertHorizontalRule'),
                      click: context.createInvokeHandler('editor.insertHorizontalRule')
                  }).render();
              });
  
              context.memo('button.fullscreen', function () {
                  return ui.button({
                      className: 'btn-fullscreen',
                      contents: ui.icon(options.icons.arrowsAlt),
                      tooltip: lang.options.fullscreen,
                      click: context.createInvokeHandler('fullscreen.toggle')
                  }).render();
              });
  
              context.memo('button.codeview', function () {
                  return ui.button({
                      className: 'btn-codeview',
                      contents: ui.icon(options.icons.code),
                      tooltip: lang.options.codeview,
                      click: context.createInvokeHandler('codeview.toggle')
                  }).render();
              });
  
              context.memo('button.redo', function () {
                  return ui.button({
                      contents: ui.icon(options.icons.redo),
                      tooltip: lang.history.redo + representShortcut('redo'),
                      click: context.createInvokeHandler('editor.redo')
                  }).render();
              });
  
              context.memo('button.undo', function () {
                  return ui.button({
                      contents: ui.icon(options.icons.undo),
                      tooltip: lang.history.undo + representShortcut('undo'),
                      click: context.createInvokeHandler('editor.undo')
                  }).render();
              });
  
              context.memo('button.help', function () {
                  return ui.button({
                      contents: ui.icon(options.icons.question),
                      tooltip: lang.options.help,
                      click: context.createInvokeHandler('helpDialog.show')
                  }).render();
              });
          };
  
          /**
           * image : [
           *   ['imagesize', ['imageSize100', 'imageSize50', 'imageSize25']],
           *   ['float', ['floatLeft', 'floatRight', 'floatNone' ]],
           *   ['remove', ['removeMedia']]
           * ],
           */
          this.addImagePopoverButtons = function () {
              // Image Size Buttons
              context.memo('button.imageSize100', function () {
                  return ui.button({
                      contents: '<span class="note-fontsize-10">100%</span>',
                      tooltip: lang.image.resizeFull,
                      click: context.createInvokeHandler('editor.resize', '1')
                  }).render();
              });
              context.memo('button.imageSize50', function () {
                  return ui.button({
                      contents: '<span class="note-fontsize-10">50%</span>',
                      tooltip: lang.image.resizeHalf,
                      click: context.createInvokeHandler('editor.resize', '0.5')
                  }).render();
              });
              context.memo('button.imageSize25', function () {
                  return ui.button({
                      contents: '<span class="note-fontsize-10">25%</span>',
                      tooltip: lang.image.resizeQuarter,
                      click: context.createInvokeHandler('editor.resize', '0.25')
                  }).render();
              });
  
              // Float Buttons
              context.memo('button.floatLeft', function () {
                  return ui.button({
                      contents: ui.icon(options.icons.alignLeft),
                      tooltip: lang.image.floatLeft,
                      click: context.createInvokeHandler('editor.floatMe', 'left')
                  }).render();
              });
  
              context.memo('button.floatRight', function () {
                  return ui.button({
                      contents: ui.icon(options.icons.alignRight),
                      tooltip: lang.image.floatRight,
                      click: context.createInvokeHandler('editor.floatMe', 'right')
                  }).render();
              });
  
              context.memo('button.floatNone', function () {
                  return ui.button({
                      contents: ui.icon(options.icons.alignJustify),
                      tooltip: lang.image.floatNone,
                      click: context.createInvokeHandler('editor.floatMe', 'none')
                  }).render();
              });
  
              // Remove Buttons
              context.memo('button.removeMedia', function () {
                  return ui.button({
                      contents: ui.icon(options.icons.trash),
                      tooltip: lang.image.remove,
                      click: context.createInvokeHandler('editor.removeMedia')
                  }).render();
              });
          };
  
          this.addLinkPopoverButtons = function () {
              context.memo('button.linkDialogShow', function () {
                  return ui.button({
                      contents: ui.icon(options.icons.link),
                      tooltip: lang.link.edit,
                      click: context.createInvokeHandler('linkDialog.show')
                  }).render();
              });
  
              context.memo('button.unlink', function () {
                  return ui.button({
                      contents: ui.icon(options.icons.unlink),
                      tooltip: lang.link.unlink,
                      click: context.createInvokeHandler('editor.unlink')
                  }).render();
              });
          };
  
          /**
           * table : [
           *  ['add', ['addRowDown', 'addRowUp', 'addColLeft', 'addColRight']],
           *  ['delete', ['deleteRow', 'deleteCol', 'deleteTable']]
           * ],
           */
          this.addTablePopoverButtons = function () {
              context.memo('button.addRowUp', function () {
                  return ui.button({
                      className: 'btn-md',
                      contents: ui.icon(options.icons.rowAbove),
                      tooltip: lang.table.addRowAbove,
                      click: context.createInvokeHandler('editor.addRow', 'top')
                  }).render();
              });
              context.memo('button.addRowDown', function () {
                  return ui.button({
                      className: 'btn-md',
                      contents: ui.icon(options.icons.rowBelow),
                      tooltip: lang.table.addRowBelow,
                      click: context.createInvokeHandler('editor.addRow', 'bottom')
                  }).render();
              });
              context.memo('button.addColLeft', function () {
                  return ui.button({
                      className: 'btn-md',
                      contents: ui.icon(options.icons.colBefore),
                      tooltip: lang.table.addColLeft,
                      click: context.createInvokeHandler('editor.addCol', 'left')
                  }).render();
              });
              context.memo('button.addColRight', function () {
                  return ui.button({
                      className: 'btn-md',
                      contents: ui.icon(options.icons.colAfter),
                      tooltip: lang.table.addColRight,
                      click: context.createInvokeHandler('editor.addCol', 'right')
                  }).render();
              });
              context.memo('button.deleteRow', function () {
                  return ui.button({
                      className: 'btn-md',
                      contents: ui.icon(options.icons.rowRemove),
                      tooltip: lang.table.delRow,
                      click: context.createInvokeHandler('editor.deleteRow')
                  }).render();
              });
              context.memo('button.deleteCol', function () {
                  return ui.button({
                      className: 'btn-md',
                      contents: ui.icon(options.icons.colRemove),
                      tooltip: lang.table.delCol,
                      click: context.createInvokeHandler('editor.deleteCol')
                  }).render();
              });
              context.memo('button.deleteTable', function () {
                  return ui.button({
                      className: 'btn-md',
                      contents: ui.icon(options.icons.trash),
                      tooltip: lang.table.delTable,
                      click: context.createInvokeHandler('editor.deleteTable')
                  }).render();
              });
          };
  
          this.build = function ($container, groups) {
              for (var groupIdx = 0, groupLen = groups.length; groupIdx < groupLen; groupIdx++) {
                  var group = groups[groupIdx];
                  var groupName = group[0];
                  var buttons = group[1];
  
                  var $group = ui.buttonGroup({
                      className: 'note-' + groupName
                  }).render();
  
                  for (var idx = 0, len = buttons.length; idx < len; idx++) {
                      var button = context.memo('button.' + buttons[idx]);
                      if (button) {
                          $group.append(typeof button === 'function' ? button(context) : button);
                      }
                  }
                  $group.appendTo($container);
              }
          };
  
          /**
           * @system {jQuery} [$container]
           */
          this.updateCurrentStyle = function ($container) {
              var $cont = $container || $toolbar;
  
              var styleInfo = context.invoke('editor.currentStyle');
              this.updateBtnStates($cont, {
                  '.note-btn-bold': function () {
                      return styleInfo['font-bold'] === 'bold';
                  },
                  '.note-btn-italic': function () {
                      return styleInfo['font-italic'] === 'italic';
                  },
                  '.note-btn-underline': function () {
                      return styleInfo['font-underline'] === 'underline';
                  },
                  '.note-btn-subscript': function () {
                      return styleInfo['font-subscript'] === 'subscript';
                  },
                  '.note-btn-superscript': function () {
                      return styleInfo['font-superscript'] === 'superscript';
                  },
                  '.note-btn-strikethrough': function () {
                      return styleInfo['font-strikethrough'] === 'strikethrough';
                  }
              });
  
              if (styleInfo['font-family']) {
                  var fontNames = styleInfo['font-family'].split(',').map(function (name) {
                      return name.replace(/[\'\"]/g, '')
                          .replace(/\s+$/, '')
                          .replace(/^\s+/, '');
                  });
                  var fontName = list.find(fontNames, self.isFontInstalled);
  
                  $cont.find('.dropdown-fontname a').each(function () {
                      var $item = $(this);
                      // always compare string to avoid creating another func.
                      var isChecked = ($item.data('value') + '') === (fontName + '');
                      $item.toggleClass('checked', isChecked);
                  });
                  $cont.find('.note-current-fontname').text(fontName);
              }
  
              if (styleInfo['font-size']) {
                  var fontSize = styleInfo['font-size'];
                  $cont.find('.dropdown-fontsize a').each(function () {
                      var $item = $(this);
                      // always compare with string to avoid creating another func.
                      var isChecked = ($item.data('value') + '') === (fontSize + '');
                      $item.toggleClass('checked', isChecked);
                  });
                  $cont.find('.note-current-fontsize').text(fontSize);
              }
  
              if (styleInfo['line-height']) {
                  var lineHeight = styleInfo['line-height'];
                  $cont.find('.dropdown-line-height li a').each(function () {
                      // always compare with string to avoid creating another func.
                      var isChecked = ($(this).data('value') + '') === (lineHeight + '');
                      this.className = isChecked ? 'checked' : '';
                  });
              }
          };
  
          this.updateBtnStates = function ($container, infos) {
              $.each(infos, function (selector, pred) {
                  ui.toggleBtnActive($container.find(selector), pred());
              });
          };
  
          this.tableMoveHandler = function (event) {
              var PX_PER_EM = 18;
              var $picker = $(event.target.parentNode); // target is mousecatcher
              var $dimensionDisplay = $picker.next();
              var $catcher = $picker.find('.note-dimension-picker-mousecatcher');
              var $highlighted = $picker.find('.note-dimension-picker-highlighted');
              var $unhighlighted = $picker.find('.note-dimension-picker-unhighlighted');
  
              var posOffset;
              // HTML5 with jQuery - e.offsetX is undefined in Firefox
              if (event.offsetX === undefined) {
                  var posCatcher = $(event.target).offset();
                  posOffset = {
                      x: event.pageX - posCatcher.left,
                      y: event.pageY - posCatcher.top
                  };
              } else {
                  posOffset = {
                      x: event.offsetX,
                      y: event.offsetY
                  };
              }
  
              var dim = {
                  c: Math.ceil(posOffset.x / PX_PER_EM) || 1,
                  r: Math.ceil(posOffset.y / PX_PER_EM) || 1
              };
  
              $highlighted.css({width: dim.c + 'em', height: dim.r + 'em'});
              $catcher.data('value', dim.c + 'x' + dim.r);
  
              if (3 < dim.c && dim.c < options.insertTableMaxSize.col) {
                  $unhighlighted.css({width: dim.c + 1 + 'em'});
              }
  
              if (3 < dim.r && dim.r < options.insertTableMaxSize.row) {
                  $unhighlighted.css({height: dim.r + 1 + 'em'});
              }
  
              $dimensionDisplay.html(dim.c + ' x ' + dim.r);
          };
      };
  
      var Toolbar = function (context) {
          var ui = $.summernote.ui;
  
          var $note = context.layoutInfo.note;
          var $editor = context.layoutInfo.editor;
          var $toolbar = context.layoutInfo.toolbar;
          var options = context.options;
  
          this.shouldInitialize = function () {
              return !options.airMode;
          };
  
          this.initialize = function () {
              options.toolbar = options.toolbar || [];
  
              if (!options.toolbar.length) {
                  $toolbar.hide();
              } else {
                  context.invoke('buttons.build', $toolbar, options.toolbar);
              }
  
              if (options.toolbarContainer) {
                  $toolbar.appendTo(options.toolbarContainer);
              }
  
              this.changeContainer(false);
  
              $note.on('summernote.keyup summernote.mouseup summernote.change', function () {
                  context.invoke('buttons.updateCurrentStyle');
              });
  
              context.invoke('buttons.updateCurrentStyle');
          };
  
          this.destroy = function () {
              $toolbar.children().remove();
          };
  
          this.changeContainer = function (isFullscreen) {
              if (isFullscreen) {
                  $toolbar.prependTo($editor);
              } else {
                  if (options.toolbarContainer) {
                      $toolbar.appendTo(options.toolbarContainer);
                  }
              }
          };
  
          this.updateFullscreen = function (isFullscreen) {
              ui.toggleBtnActive($toolbar.find('.btn-fullscreen'), isFullscreen);
  
              this.changeContainer(isFullscreen);
          };
  
          this.updateCodeview = function (isCodeview) {
              ui.toggleBtnActive($toolbar.find('.btn-codeview'), isCodeview);
              if (isCodeview) {
                  this.deactivate();
              } else {
                  this.activate();
              }
          };
  
          this.activate = function (isIncludeCodeview) {
              var $btn = $toolbar.find('button');
              if (!isIncludeCodeview) {
                  $btn = $btn.not('.btn-codeview');
              }
              ui.toggleBtn($btn, true);
          };
  
          this.deactivate = function (isIncludeCodeview) {
              var $btn = $toolbar.find('button');
              if (!isIncludeCodeview) {
                  $btn = $btn.not('.btn-codeview');
              }
              ui.toggleBtn($btn, false);
          };
      };
  
      var LinkDialog = function (context) {
          var self = this;
          var ui = $.summernote.ui;
  
          var $editor = context.layoutInfo.editor;
          var options = context.options;
          var lang = options.langInfo;
  
          this.initialize = function () {
              var $container = options.dialogsInBody ? $(document.body) : $editor;
  
              var body = '<div class="form-group note-form-group">' +
                  '<label class="note-form-label">' + lang.link.textToDisplay + '</label>' +
                  '<input class="note-link-text form-control ' +
                  ' note-form-control  note-input" type="text" />' +
                  '</div>' +
                  '<div class="form-group note-form-group">' +
                  '<label class="note-form-label">' + lang.link.url + '</label>' +
                  '<input class="note-link-url form-control note-form-control ' +
                  'note-input" type="text" value="http://" />' +
                  '</div>' +
                  (!options.disableLinkTarget ?
                      $('<div/>').append(ui.checkbox({
                          id: 'sn-checkbox-open-in-new-window',
                          text: lang.link.openInNewWindow,
                          checked: true
                      }).render())
                          .html()
                      : '');
              var footer = '<button href="#" class="btn btn-primary note-btn note-btn-primary ' +
                  'note-link-btn disabled" disabled>' + lang.link.insert + '</button>';
  
              this.$dialog = ui.dialog({
                  className: 'link-dialog',
                  title: lang.link.insert,
                  fade: options.dialogsFade,
                  body: body,
                  footer: footer
              }).render().appendTo($container);
          };
  
          this.destroy = function () {
              ui.hideDialog(this.$dialog);
              this.$dialog.remove();
          };
  
          this.bindEnterKey = function ($input, $btn) {
              $input.on('keypress', function (event) {
                  if (event.keyCode === key.code.ENTER) {
                      $btn.trigger('click');
                  }
              });
          };
  
          /**
           * toggle update button
           */
          this.toggleLinkBtn = function ($linkBtn, $linkText, $linkUrl) {
              ui.toggleBtn($linkBtn, $linkText.val() && $linkUrl.val());
          };
  
          /**
           * Show link dialog and set event handlers on dialog controls.
           *
           * @system {Object} linkInfo
           * @return {Promise}
           */
          this.showLinkDialog = function (linkInfo) {
              return $.Deferred(function (deferred) {
                  var $linkText = self.$dialog.find('.note-link-text'),
                      $linkUrl = self.$dialog.find('.note-link-url'),
                      $linkBtn = self.$dialog.find('.note-link-btn'),
                      $openInNewWindow = self.$dialog.find('input[type=checkbox]');
  
                  ui.onDialogShown(self.$dialog, function () {
                      context.triggerEvent('dialog.shown');
  
                      // if no url was given, copy text to url
                      if (!linkInfo.url) {
                          linkInfo.url = linkInfo.text;
                      }
  
                      $linkText.val(linkInfo.text);
  
                      var handleLinkTextUpdate = function () {
                          self.toggleLinkBtn($linkBtn, $linkText, $linkUrl);
                          // if linktext was modified by keyup,
                          // stop cloning text from linkUrl
                          linkInfo.text = $linkText.val();
                      };
  
                      $linkText.on('input', handleLinkTextUpdate).on('paste', function () {
                          setTimeout(handleLinkTextUpdate, 0);
                      });
  
                      var handleLinkUrlUpdate = function () {
                          self.toggleLinkBtn($linkBtn, $linkText, $linkUrl);
                          // display same link on `Text to display` input
                          // when create a new link
                          if (!linkInfo.text) {
                              $linkText.val($linkUrl.val());
                          }
                      };
  
                      $linkUrl.on('input', handleLinkUrlUpdate).on('paste', function () {
                          setTimeout(handleLinkUrlUpdate, 0);
                      }).val(linkInfo.url).trigger('focus');
  
                      self.toggleLinkBtn($linkBtn, $linkText, $linkUrl);
                      self.bindEnterKey($linkUrl, $linkBtn);
                      self.bindEnterKey($linkText, $linkBtn);
  
                      var isChecked = linkInfo.isNewWindow !== undefined ?
                          linkInfo.isNewWindow : context.options.linkTargetBlank;
  
                      $openInNewWindow.prop('checked', isChecked);
  
                      $linkBtn.one('click', function (event) {
                          event.preventDefault();
  
                          deferred.resolve({
                              range: linkInfo.range,
                              url: $linkUrl.val(),
                              text: $linkText.val(),
                              isNewWindow: $openInNewWindow.is(':checked')
                          });
                          ui.hideDialog(self.$dialog);
                      });
                  });
  
                  ui.onDialogHidden(self.$dialog, function () {
                      // detach events
                      $linkText.off('input paste keypress');
                      $linkUrl.off('input paste keypress');
                      $linkBtn.off('click');
  
                      if (deferred.state() === 'pending') {
                          deferred.reject();
                      }
                  });
  
                  ui.showDialog(self.$dialog);
              }).promise();
          };
  
          /**
           * @system {Object} layoutInfo
           */
          this.show = function () {
              var linkInfo = context.invoke('editor.getLinkInfo');
  
              context.invoke('editor.saveRange');
              this.showLinkDialog(linkInfo).then(function (linkInfo) {
                  context.invoke('editor.restoreRange');
                  context.invoke('editor.createLink', linkInfo);
              }).fail(function () {
                  context.invoke('editor.restoreRange');
              });
          };
          context.memo('help.linkDialog.show', options.langInfo.help['linkDialog.show']);
      };
  
      var LinkPopover = function (context) {
          var self = this;
          var ui = $.summernote.ui;
  
          var options = context.options;
  
          this.events = {
              'summernote.keyup summernote.mouseup summernote.change summernote.scroll': function () {
                  self.update();
              },
              'summernote.disable summernote.dialog.shown': function () {
                  self.hide();
              }
          };
  
          this.shouldInitialize = function () {
              return !list.isEmpty(options.popover.link);
          };
  
          this.initialize = function () {
              this.$popover = ui.popover({
                  className: 'note-link-popover',
                  callback: function ($node) {
                      var $content = $node.find('.popover-content,.note-popover-content');
                      $content.prepend('<span><a target="_blank"></a>&nbsp;</span>');
                  }
              }).render().appendTo('body');
              var $content = this.$popover.find('.popover-content,.note-popover-content');
  
              context.invoke('buttons.build', $content, options.popover.link);
          };
  
          this.destroy = function () {
              this.$popover.remove();
          };
  
          this.update = function () {
              // Prevent focusing on editable when invoke('code') is executed
              if (!context.invoke('editor.hasFocus')) {
                  this.hide();
                  return;
              }
  
              var rng = context.invoke('editor.createRange');
              if (rng.isCollapsed() && rng.isOnAnchor()) {
                  var anchor = dom.ancestor(rng.sc, dom.isAnchor);
                  var href = $(anchor).attr('href');
                  this.$popover.find('a').attr('href', href).html(href);
  
                  var pos = dom.posFromPlaceholder(anchor);
                  this.$popover.css({
                      display: 'block',
                      left: pos.left,
                      top: pos.top
                  });
              } else {
                  this.hide();
              }
          };
  
          this.hide = function () {
              this.$popover.hide();
          };
      };
  
      var ImageDialog = function (context) {
          var self = this;
          var ui = $.summernote.ui;
  
          var $editor = context.layoutInfo.editor;
          var options = context.options;
          var lang = options.langInfo;
  
          this.initialize = function () {
              var $container = options.dialogsInBody ? $(document.body) : $editor;
  
              var imageLimitation = '';
              if (options.maximumImageFileSize) {
                  var unit = Math.floor(Math.log(options.maximumImageFileSize) / Math.log(1024));
                  var readableSize = (options.maximumImageFileSize / Math.pow(1024, unit)).toFixed(2) * 1 +
                      ' ' + ' KMGTP'[unit] + 'B';
                  imageLimitation = '<small>' + lang.image.maximumFileSize + ' : ' + readableSize + '</small>';
              }
  
              var body = '<div class="form-group note-form-group note-group-select-from-files">' +
                  '<label class="note-form-label">' + lang.image.selectFromFiles + '</label>' +
                  '<input class="note-image-input form-control note-form-control note-input" ' +
                  ' type="file" name="files" accept="image/*" multiple="multiple" />' +
                  imageLimitation +
                  '</div>' +
                  '<div class="form-group note-group-image-url" style="overflow:auto;">' +
                  '<label class="note-form-label">' + lang.image.url + '</label>' +
                  '<input class="note-image-url form-control note-form-control note-input ' +
                  ' col-md-12" type="text" />' +
                  '</div>';
              var footer = '<button href="#" class="btn btn-primary note-btn note-btn-primary ' +
                  'note-image-btn disabled" disabled>' + lang.image.insert + '</button>';
  
              this.$dialog = ui.dialog({
                  title: lang.image.insert,
                  fade: options.dialogsFade,
                  body: body,
                  footer: footer
              }).render().appendTo($container);
          };
  
          this.destroy = function () {
              ui.hideDialog(this.$dialog);
              this.$dialog.remove();
          };
  
          this.bindEnterKey = function ($input, $btn) {
              $input.on('keypress', function (event) {
                  if (event.keyCode === key.code.ENTER) {
                      $btn.trigger('click');
                  }
              });
          };
  
          this.show = function () {
              context.invoke('editor.saveRange');
              this.showImageDialog().then(function (data) {
                  // [workaround] hide dialog before restore range for IE range focus
                  ui.hideDialog(self.$dialog);
                  context.invoke('editor.restoreRange');
  
                  if (typeof data === 'string') { // image url
                      context.invoke('editor.insertImage', data);
                  } else { // array of files
                      context.invoke('editor.insertImagesOrCallback', data);
                  }
              }).fail(function () {
                  context.invoke('editor.restoreRange');
              });
          };
  
          /**
           * show image dialog
           *
           * @system {jQuery} $dialog
           * @return {Promise}
           */
          this.showImageDialog = function () {
              return $.Deferred(function (deferred) {
                  var $imageInput = self.$dialog.find('.note-image-input'),
                      $imageUrl = self.$dialog.find('.note-image-url'),
                      $imageBtn = self.$dialog.find('.note-image-btn');
  
                  ui.onDialogShown(self.$dialog, function () {
                      context.triggerEvent('dialog.shown');
  
                      // Cloning imageInput to clear element.
                      $imageInput.replaceWith($imageInput.clone()
                          .on('change', function () {
                              deferred.resolve(this.files || this.value);
                          })
                          .val('')
                      );
  
                      $imageBtn.click(function (event) {
                          event.preventDefault();
  
                          deferred.resolve($imageUrl.val());
                      });
  
                      $imageUrl.on('keyup paste', function () {
                          var url = $imageUrl.val();
                          ui.toggleBtn($imageBtn, url);
                      }).val('').trigger('focus');
                      self.bindEnterKey($imageUrl, $imageBtn);
                  });
  
                  ui.onDialogHidden(self.$dialog, function () {
                      $imageInput.off('change');
                      $imageUrl.off('keyup paste keypress');
                      $imageBtn.off('click');
  
                      if (deferred.state() === 'pending') {
                          deferred.reject();
                      }
                  });
  
                  ui.showDialog(self.$dialog);
              });
          };
      };
  
  
      /**
       * Image popover module
       *  mouse events that show/hide popover will be handled by Handle.js.
       *  Handle.js will receive the events and invoke 'imagePopover.update'.
       */
      var ImagePopover = function (context) {
          var self = this;
          var ui = $.summernote.ui;
  
          var $editable = context.layoutInfo.editable;
          var editable = $editable[0];
          var options = context.options;
  
          this.events = {
              'summernote.disable': function () {
                  self.hide();
              }
          };
  
          this.shouldInitialize = function () {
              return !list.isEmpty(options.popover.image);
          };
  
          this.initialize = function () {
              this.$popover = ui.popover({
                  className: 'note-image-popover'
              }).render().appendTo('body');
              var $content = this.$popover.find('.popover-content,.note-popover-content');
  
              context.invoke('buttons.build', $content, options.popover.image);
          };
  
          this.destroy = function () {
              this.$popover.remove();
          };
  
          this.update = function (target) {
              if (dom.isImg(target)) {
                  var pos = dom.posFromPlaceholder(target);
                  var posEditor = dom.posFromPlaceholder(editable);
  
                  this.$popover.css({
                      display: 'block',
                      left: pos.left,
                      top: Math.min(pos.top, posEditor.top)
                  });
              } else {
                  this.hide();
              }
          };
  
          this.hide = function () {
              this.$popover.hide();
          };
      };
  
      var TablePopover = function (context) {
          var self = this;
          var ui = $.summernote.ui;
  
          var options = context.options;
  
          this.events = {
              'summernote.mousedown': function (we, e) {
                  self.update(e.target);
              },
              'summernote.keyup summernote.scroll summernote.change': function () {
                  self.update();
              },
              'summernote.disable': function () {
                  self.hide();
              }
          };
  
          this.shouldInitialize = function () {
              return !list.isEmpty(options.popover.table);
          };
  
          this.initialize = function () {
              this.$popover = ui.popover({
                  className: 'note-table-popover'
              }).render().appendTo('body');
              var $content = this.$popover.find('.popover-content,.note-popover-content');
  
              context.invoke('buttons.build', $content, options.popover.table);
  
              // [workaround] Disable Firefox's default table editor
              if (agent.isFF) {
                  document.execCommand('enableInlineTableEditing', false, false);
              }
          };
  
          this.destroy = function () {
              this.$popover.remove();
          };
  
          this.update = function (target) {
              if (context.isDisabled()) {
                  return false;
              }
  
              var isCell = dom.isCell(target);
  
              if (isCell) {
                  var pos = dom.posFromPlaceholder(target);
                  this.$popover.css({
                      display: 'block',
                      left: pos.left,
                      top: pos.top
                  });
              } else {
                  this.hide();
              }
  
              return isCell;
          };
  
          this.hide = function () {
              this.$popover.hide();
          };
      };
  
      var VideoDialog = function (context) {
          var self = this;
          var ui = $.summernote.ui;
  
          var $editor = context.layoutInfo.editor;
          var options = context.options;
          var lang = options.langInfo;
  
          this.initialize = function () {
              var $container = options.dialogsInBody ? $(document.body) : $editor;
  
              var body = '<div class="form-group note-form-group row-fluid">' +
                  '<label class="note-form-label">' + lang.video.url + ' <small class="text-muted">' + lang.video.providers + '</small></label>' +
                  '<input class="note-video-url form-control  note-form-control note-input span12" ' +
                  ' type="text" />' +
                  '</div>';
              var footer = '<button href="#" class="btn btn-primary note-btn note-btn-primary ' +
                  ' note-video-btn disabled" disabled>' + lang.video.insert + '</button>';
  
              this.$dialog = ui.dialog({
                  title: lang.video.insert,
                  fade: options.dialogsFade,
                  body: body,
                  footer: footer
              }).render().appendTo($container);
          };
  
          this.destroy = function () {
              ui.hideDialog(this.$dialog);
              this.$dialog.remove();
          };
  
          this.bindEnterKey = function ($input, $btn) {
              $input.on('keypress', function (event) {
                  if (event.keyCode === key.code.ENTER) {
                      $btn.trigger('click');
                  }
              });
          };
  
          this.createVideoNode = function (url) {
              // video url patterns(youtube, instagram, vimeo, dailymotion, youku, mp4, ogg, webm)
              var ytRegExp = /^(?:https?:\/\/)?(?:www\.)?(?:youtu\.be\/|youtube\.com\/(?:embed\/|v\/|watch\?v=|watch\?.+&v=))((\w|-){11})(?:\S+)?$/;
              var ytMatch = url.match(ytRegExp);
  
              var igRegExp = /(?:www\.|\/\/)instagram\.com\/p\/(.[a-zA-Z0-9_-]*)/;
              var igMatch = url.match(igRegExp);
  
              var vRegExp = /\/\/vine\.co\/v\/([a-zA-Z0-9]+)/;
              var vMatch = url.match(vRegExp);
  
              var vimRegExp = /\/\/(player\.)?vimeo\.com\/([a-z]*\/)*(\d+)[?]?.*/;
              var vimMatch = url.match(vimRegExp);
  
              var dmRegExp = /.+dailymotion.com\/(video|hub)\/([^_]+)[^#]*(#video=([^_&]+))?/;
              var dmMatch = url.match(dmRegExp);
  
              var youkuRegExp = /\/\/v\.youku\.com\/v_show\/id_(\w+)=*\.html/;
              var youkuMatch = url.match(youkuRegExp);
  
              var qqRegExp = /\/\/v\.qq\.com.*?vid=(.+)/;
              var qqMatch = url.match(qqRegExp);
  
              var qqRegExp2 = /\/\/v\.qq\.com\/x?\/?(page|cover).*?\/([^\/]+)\.html\??.*/;
              var qqMatch2 = url.match(qqRegExp2);
  
              var mp4RegExp = /^.+.(mp4|m4v)$/;
              var mp4Match = url.match(mp4RegExp);
  
              var oggRegExp = /^.+.(ogg|ogv)$/;
              var oggMatch = url.match(oggRegExp);
  
              var webmRegExp = /^.+.(webm)$/;
              var webmMatch = url.match(webmRegExp);
  
              var $video;
              if (ytMatch && ytMatch[1].length === 11) {
                  var youtubeId = ytMatch[1];
                  $video = $('<iframe>')
                      .attr('frameborder', 0)
                      .attr('src', '//www.youtube.com/embed/' + youtubeId)
                      .attr('width', '640').attr('height', '360');
              } else if (igMatch && igMatch[0].length) {
                  $video = $('<iframe>')
                      .attr('frameborder', 0)
                      .attr('src', 'https://instagram.com/p/' + igMatch[1] + '/embed/')
                      .attr('width', '612').attr('height', '710')
                      .attr('scrolling', 'no')
                      .attr('allowtransparency', 'true');
              } else if (vMatch && vMatch[0].length) {
                  $video = $('<iframe>')
                      .attr('frameborder', 0)
                      .attr('src', vMatch[0] + '/embed/simple')
                      .attr('width', '600').attr('height', '600')
                      .attr('class', 'vine-embed');
              } else if (vimMatch && vimMatch[3].length) {
                  $video = $('<iframe webkitallowfullscreen mozallowfullscreen allowfullscreen>')
                      .attr('frameborder', 0)
                      .attr('src', '//player.vimeo.com/video/' + vimMatch[3])
                      .attr('width', '640').attr('height', '360');
              } else if (dmMatch && dmMatch[2].length) {
                  $video = $('<iframe>')
                      .attr('frameborder', 0)
                      .attr('src', '//www.dailymotion.com/embed/video/' + dmMatch[2])
                      .attr('width', '640').attr('height', '360');
              } else if (youkuMatch && youkuMatch[1].length) {
                  $video = $('<iframe webkitallowfullscreen mozallowfullscreen allowfullscreen>')
                      .attr('frameborder', 0)
                      .attr('height', '498')
                      .attr('width', '510')
                      .attr('src', '//player.youku.com/embed/' + youkuMatch[1]);
              } else if ((qqMatch && qqMatch[1].length) || (qqMatch2 && qqMatch2[2].length)) {
                  var vid = ((qqMatch && qqMatch[1].length) ? qqMatch[1] : qqMatch2[2]);
                  $video = $('<iframe webkitallowfullscreen mozallowfullscreen allowfullscreen>')
                      .attr('frameborder', 0)
                      .attr('height', '310')
                      .attr('width', '500')
                      .attr('src', 'http://v.qq.com/iframe/player.html?vid=' + vid + '&amp;auto=0');
              } else if (mp4Match || oggMatch || webmMatch) {
                  $video = $('<video controls>')
                      .attr('src', url)
                      .attr('width', '640').attr('height', '360');
              } else {
                  // this is not a known video link. Now what, Cat? Now what?
                  return false;
              }
  
              $video.addClass('note-video-clip');
  
              return $video[0];
          };
  
          this.show = function () {
              var text = context.invoke('editor.getSelectedText');
              context.invoke('editor.saveRange');
              this.showVideoDialog(text).then(function (url) {
                  // [workaround] hide dialog before restore range for IE range focus
                  ui.hideDialog(self.$dialog);
                  context.invoke('editor.restoreRange');
  
                  // build node
                  var $node = self.createVideoNode(url);
  
                  if ($node) {
                      // insert video node
                      context.invoke('editor.insertNode', $node);
                  }
              }).fail(function () {
                  context.invoke('editor.restoreRange');
              });
          };
  
          /**
           * show image dialog
           *
           * @system {jQuery} $dialog
           * @return {Promise}
           */
          this.showVideoDialog = function (text) {
              return $.Deferred(function (deferred) {
                  var $videoUrl = self.$dialog.find('.note-video-url'),
                      $videoBtn = self.$dialog.find('.note-video-btn');
  
                  ui.onDialogShown(self.$dialog, function () {
                      context.triggerEvent('dialog.shown');
  
                      $videoUrl.val(text).on('input', function () {
                          ui.toggleBtn($videoBtn, $videoUrl.val());
                      }).trigger('focus');
  
                      $videoBtn.click(function (event) {
                          event.preventDefault();
  
                          deferred.resolve($videoUrl.val());
                      });
  
                      self.bindEnterKey($videoUrl, $videoBtn);
                  });
  
                  ui.onDialogHidden(self.$dialog, function () {
                      $videoUrl.off('input');
                      $videoBtn.off('click');
  
                      if (deferred.state() === 'pending') {
                          deferred.reject();
                      }
                  });
  
                  ui.showDialog(self.$dialog);
              });
          };
      };
  
      var HelpDialog = function (context) {
          var self = this;
          var ui = $.summernote.ui;
  
          var $editor = context.layoutInfo.editor;
          var options = context.options;
          var lang = options.langInfo;
  
          this.createShortCutList = function () {
              var keyMap = options.keyMap[agent.isMac ? 'mac' : 'pc'];
              return Object.keys(keyMap).map(function (key) {
                  var command = keyMap[key];
                  var $row = $('<div><div class="help-list-item"/></div>');
                  $row.append($('<label><kbd>' + key + '</kdb></label>').css({
                      'width': 180,
                      'margin-right': 10
                  })).append($('<span/>').html(context.memo('help.' + command) || command));
                  return $row.html();
              }).join('');
          };
  
          this.initialize = function () {
              var $container = options.dialogsInBody ? $(document.body) : $editor;
  
              var body = [
                  '<p class="text-center">',
                  '<a href="http://summernote.org/" target="_blank">Summernote 0.8.8</a> · ',
                  '<a href="https://github.com/summernote/summernote" target="_blank">Project</a> · ',
                  '<a href="https://github.com/summernote/summernote/issues" target="_blank">Issues</a>',
                  '</p>'
              ].join('');
  
              this.$dialog = ui.dialog({
                  title: lang.options.help,
                  fade: options.dialogsFade,
                  body: this.createShortCutList(),
                  footer: body,
                  callback: function ($node) {
                      $node.find('.modal-body,.note-modal-body').css({
                          'max-height': 300,
                          'overflow': 'scroll'
                      });
                  }
              }).render().appendTo($container);
          };
  
          this.destroy = function () {
              ui.hideDialog(this.$dialog);
              this.$dialog.remove();
          };
  
          /**
           * show help dialog
           *
           * @return {Promise}
           */
          this.showHelpDialog = function () {
              return $.Deferred(function (deferred) {
                  ui.onDialogShown(self.$dialog, function () {
                      context.triggerEvent('dialog.shown');
                      deferred.resolve();
                  });
                  ui.showDialog(self.$dialog);
              }).promise();
          };
  
          this.show = function () {
              context.invoke('editor.saveRange');
              this.showHelpDialog().then(function () {
                  context.invoke('editor.restoreRange');
              });
          };
      };
  
      var AirPopover = function (context) {
          var self = this;
          var ui = $.summernote.ui;
  
          var options = context.options;
  
          var AIR_MODE_POPOVER_X_OFFSET = 20;
  
          this.events = {
              'summernote.keyup summernote.mouseup summernote.scroll': function () {
                  self.update();
              },
              'summernote.disable summernote.change summernote.dialog.shown': function () {
                  self.hide();
              },
              'summernote.focusout': function (we, e) {
                  // [workaround] Firefox doesn't support relatedTarget on focusout
                  //  - Ignore hide action on focus out in FF.
                  if (agent.isFF) {
                      return;
                  }
  
                  if (!e.relatedTarget || !dom.ancestor(e.relatedTarget, func.eq(self.$popover[0]))) {
                      self.hide();
                  }
              }
          };
  
          this.shouldInitialize = function () {
              return options.airMode && !list.isEmpty(options.popover.air);
          };
  
          this.initialize = function () {
              this.$popover = ui.popover({
                  className: 'note-air-popover'
              }).render().appendTo('body');
              var $content = this.$popover.find('.popover-content');
  
              context.invoke('buttons.build', $content, options.popover.air);
          };
  
          this.destroy = function () {
              this.$popover.remove();
          };
  
          this.update = function () {
              var styleInfo = context.invoke('editor.currentStyle');
              if (styleInfo.range && !styleInfo.range.isCollapsed()) {
                  var rect = list.last(styleInfo.range.getClientRects());
                  if (rect) {
                      var bnd = func.rect2bnd(rect);
                      this.$popover.css({
                          display: 'block',
                          left: Math.max(bnd.left + bnd.width / 2, 0) - AIR_MODE_POPOVER_X_OFFSET,
                          top: bnd.top + bnd.height
                      });
                      context.invoke('buttons.updateCurrentStyle', this.$popover);
                  }
              } else {
                  this.hide();
              }
          };
  
          this.hide = function () {
              this.$popover.hide();
          };
      };
  
      var HintPopover = function (context) {
          var self = this;
          var ui = $.summernote.ui;
  
          var POPOVER_DIST = 5;
          var hint = context.options.hint || [];
          var direction = context.options.hintDirection || 'bottom';
          var hints = $.isArray(hint) ? hint : [hint];
  
          this.events = {
              'summernote.keyup': function (we, e) {
                  if (!e.isDefaultPrevented()) {
                      self.handleKeyup(e);
                  }
              },
              'summernote.keydown': function (we, e) {
                  self.handleKeydown(e);
              },
              'summernote.disable summernote.dialog.shown': function () {
                  self.hide();
              }
          };
  
          this.shouldInitialize = function () {
              return hints.length > 0;
          };
  
          this.initialize = function () {
              this.lastWordRange = null;
              this.$popover = ui.popover({
                  className: 'note-hint-popover',
                  hideArrow: true,
                  direction: ''
              }).render().appendTo('body');
  
              this.$popover.hide();
  
              this.$content = this.$popover.find('.popover-content,.note-popover-content');
  
              this.$content.on('click', '.note-hint-item', function () {
                  self.$content.find('.active').removeClass('active');
                  $(this).addClass('active');
                  self.replace();
              });
          };
  
          this.destroy = function () {
              this.$popover.remove();
          };
  
          this.selectItem = function ($item) {
              this.$content.find('.active').removeClass('active');
              $item.addClass('active');
  
              this.$content[0].scrollTop = $item[0].offsetTop - (this.$content.innerHeight() / 2);
          };
  
          this.moveDown = function () {
              var $current = this.$content.find('.note-hint-item.active');
              var $next = $current.next();
  
              if ($next.length) {
                  this.selectItem($next);
              } else {
                  var $nextGroup = $current.parent().next();
  
                  if (!$nextGroup.length) {
                      $nextGroup = this.$content.find('.note-hint-group').first();
                  }
  
                  this.selectItem($nextGroup.find('.note-hint-item').first());
              }
          };
  
          this.moveUp = function () {
              var $current = this.$content.find('.note-hint-item.active');
              var $prev = $current.prev();
  
              if ($prev.length) {
                  this.selectItem($prev);
              } else {
                  var $prevGroup = $current.parent().prev();
  
                  if (!$prevGroup.length) {
                      $prevGroup = this.$content.find('.note-hint-group').last();
                  }
  
                  this.selectItem($prevGroup.find('.note-hint-item').last());
              }
          };
  
          this.replace = function () {
              var $item = this.$content.find('.note-hint-item.active');
  
              if ($item.length) {
                  var node = this.nodeFromItem($item);
                  // XXX: consider to move codes to editor for recording redo/undo.
                  this.lastWordRange.insertNode(node);
                  range.createFromNode(node).collapse().select();
  
                  this.lastWordRange = null;
                  this.hide();
                  context.triggerEvent('change', context.layoutInfo.editable.html(), context.layoutInfo.editable);
                  context.invoke('editor.focus');
              }
  
          };
  
          this.nodeFromItem = function ($item) {
              var hint = hints[$item.data('index')];
              var item = $item.data('item');
              var node = hint.content ? hint.content(item) : item;
              if (typeof node === 'string') {
                  node = dom.createText(node);
              }
              return node;
          };
  
          this.createItemTemplates = function (hintIdx, items) {
              var hint = hints[hintIdx];
              return items.map(function (item, idx) {
                  var $item = $('<div class="note-hint-item"/>');
                  $item.append(hint.template ? hint.template(item) : item + '');
                  $item.data({
                      'index': hintIdx,
                      'item': item
                  });
  
                  if (hintIdx === 0 && idx === 0) {
                      $item.addClass('active');
                  }
                  return $item;
              });
          };
  
          this.handleKeydown = function (e) {
              if (!this.$popover.is(':visible')) {
                  return;
              }
  
              if (e.keyCode === key.code.ENTER) {
                  e.preventDefault();
                  this.replace();
              } else if (e.keyCode === key.code.UP) {
                  e.preventDefault();
                  this.moveUp();
              } else if (e.keyCode === key.code.DOWN) {
                  e.preventDefault();
                  this.moveDown();
              }
          };
  
          this.searchKeyword = function (index, keyword, callback) {
              var hint = hints[index];
              if (hint && hint.match.test(keyword) && hint.search) {
                  var matches = hint.match.exec(keyword);
                  hint.search(matches[1], callback);
              } else {
                  callback();
              }
          };
  
          this.createGroup = function (idx, keyword) {
              var $group = $('<div class="note-hint-group note-hint-group-' + idx + '"/>');
              this.searchKeyword(idx, keyword, function (items) {
                  items = items || [];
                  if (items.length) {
                      $group.html(self.createItemTemplates(idx, items));
                      self.show();
                  }
              });
  
              return $group;
          };
  
          this.handleKeyup = function (e) {
              if (list.contains([key.code.ENTER, key.code.UP, key.code.DOWN], e.keyCode)) {
                  if (e.keyCode === key.code.ENTER) {
                      if (this.$popover.is(':visible')) {
                          return;
                      }
                  }
              } else {
                  var wordRange = context.invoke('editor.createRange').getWordRange();
                  var keyword = wordRange.toString();
                  if (hints.length && keyword) {
                      this.$content.empty();
  
                      var bnd = func.rect2bnd(list.last(wordRange.getClientRects()));
                      if (bnd) {
  
                          this.$popover.hide();
  
                          this.lastWordRange = wordRange;
  
                          hints.forEach(function (hint, idx) {
                              if (hint.match.test(keyword)) {
                                  self.createGroup(idx, keyword).appendTo(self.$content);
                              }
                          });
  
                          // set position for popover after group is created
                          if (direction === 'top') {
                              this.$popover.css({
                                  left: bnd.left,
                                  top: bnd.top - this.$popover.outerHeight() - POPOVER_DIST
                              });
                          } else {
                              this.$popover.css({
                                  left: bnd.left,
                                  top: bnd.top + bnd.height + POPOVER_DIST
                              });
                          }
  
                      }
                  } else {
                      this.hide();
                  }
              }
          };
  
          this.show = function () {
              this.$popover.show();
          };
  
          this.hide = function () {
              this.$popover.hide();
          };
      };
  
  
      $.summernote = $.extend($.summernote, {
          version: '0.8.8',
          ui: ui,
          dom: dom,
  
          plugins: {},
  
          options: {
              modules: {
                  'editor': Editor,
                  'clipboard': Clipboard,
                  'dropzone': Dropzone,
                  'codeview': Codeview,
                  'statusbar': Statusbar,
                  'fullscreen': Fullscreen,
                  'handle': Handle,
                  // FIXME: HintPopover must be front of autolink
                  //  - Script error about range when Enter key is pressed on hint popover
                  'hintPopover': HintPopover,
                  'autoLink': AutoLink,
                  'autoSync': AutoSync,
                  'placeholder': Placeholder,
                  'buttons': Buttons,
                  'toolbar': Toolbar,
                  'linkDialog': LinkDialog,
                  'linkPopover': LinkPopover,
                  'imageDialog': ImageDialog,
                  'imagePopover': ImagePopover,
                  'tablePopover': TablePopover,
                  'videoDialog': VideoDialog,
                  'helpDialog': HelpDialog,
                  'airPopover': AirPopover
              },
  
              buttons: {},
  
              lang: 'en-US',
  
              // toolbar
              toolbar: [
                  ['style', ['style']],
                  ['font', ['bold', 'underline', 'clear']],
                  ['fontname', ['fontname']],
                  ['color', ['color']],
                  ['para', ['ul', 'ol', 'paragraph']],
                  ['table', ['table']],
                  ['insert', ['link', 'picture', 'video']],
                  ['view', ['fullscreen', 'codeview', 'help']]
              ],
  
              // popover
              popover: {
                  image: [
                      ['imagesize', ['imageSize100', 'imageSize50', 'imageSize25']],
                      ['float', ['floatLeft', 'floatRight', 'floatNone']],
                      ['remove', ['removeMedia']]
                  ],
                  link: [
                      ['link', ['linkDialogShow', 'unlink']]
                  ],
                  table: [
                      ['add', ['addRowDown', 'addRowUp', 'addColLeft', 'addColRight']],
                      ['delete', ['deleteRow', 'deleteCol', 'deleteTable']]
                  ],
                  air: [
                      ['color', ['color']],
                      ['font', ['bold', 'underline', 'clear']],
                      ['para', ['ul', 'paragraph']],
                      ['table', ['table']],
                      ['insert', ['link', 'picture']]
                  ]
              },
  
              // air mode: inline editor
              airMode: false,
  
              width: null,
              height: null,
              linkTargetBlank: true,
  
              focus: false,
              tabSize: 4,
              styleWithSpan: true,
              shortcuts: true,
              textareaAutoSync: true,
              direction: null,
              tooltip: 'auto',
  
              styleTags: ['p', 'blockquote', 'pre', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6'],
  
              fontNames: [
                  'Arial', 'Arial Black', 'Comic Sans MS', 'Courier New',
                  'Helvetica Neue', 'Helvetica', 'Impact', 'Lucida Grande',
                  'Tahoma', 'Times New Roman', 'Verdana'
              ],
  
              fontSizes: ['8', '9', '10', '11', '12', '14', '18', '24', '36'],
  
              // pallete colors(n x n)
              colors: [
                  ['#000000', '#424242', '#636363', '#9C9C94', '#CEC6CE', '#EFEFEF', '#F7F7F7', '#FFFFFF'],
                  ['#FF0000', '#FF9C00', '#FFFF00', '#00FF00', '#00FFFF', '#0000FF', '#9C00FF', '#FF00FF'],
                  ['#F7C6CE', '#FFE7CE', '#FFEFC6', '#D6EFD6', '#CEDEE7', '#CEE7F7', '#D6D6E7', '#E7D6DE'],
                  ['#E79C9C', '#FFC69C', '#FFE79C', '#B5D6A5', '#A5C6CE', '#9CC6EF', '#B5A5D6', '#D6A5BD'],
                  ['#E76363', '#F7AD6B', '#FFD663', '#94BD7B', '#73A5AD', '#6BADDE', '#8C7BC6', '#C67BA5'],
                  ['#CE0000', '#E79439', '#EFC631', '#6BA54A', '#4A7B8C', '#3984C6', '#634AA5', '#A54A7B'],
                  ['#9C0000', '#B56308', '#BD9400', '#397B21', '#104A5A', '#085294', '#311873', '#731842'],
                  ['#630000', '#7B3900', '#846300', '#295218', '#083139', '#003163', '#21104A', '#4A1031']
              ],
  
              lineHeights: ['1.0', '1.2', '1.4', '1.5', '1.6', '1.8', '2.0', '3.0'],
  
              tableClassName: 'table table-bordered',
  
              insertTableMaxSize: {
                  col: 10,
                  row: 10
              },
  
              dialogsInBody: false,
              dialogsFade: false,
  
              maximumImageFileSize: null,
  
              callbacks: {
                  onInit: null,
                  onFocus: null,
                  onBlur: null,
                  onEnter: null,
                  onKeyup: null,
                  onKeydown: null,
                  onImageUpload: null,
                  onImageUploadError: null
              },
  
              codemirror: {
                  mode: 'text/html',
                  htmlMode: true,
                  lineNumbers: true
              },
  
              keyMap: {
                  pc: {
                      'ENTER': 'insertParagraph',
                      'CTRL+Z': 'undo',
                      'CTRL+Y': 'redo',
                      'TAB': 'tab',
                      'SHIFT+TAB': 'untab',
                      'CTRL+B': 'bold',
                      'CTRL+I': 'italic',
                      'CTRL+U': 'underline',
                      'CTRL+SHIFT+S': 'strikethrough',
                      'CTRL+BACKSLASH': 'removeFormat',
                      'CTRL+SHIFT+L': 'justifyLeft',
                      'CTRL+SHIFT+E': 'justifyCenter',
                      'CTRL+SHIFT+R': 'justifyRight',
                      'CTRL+SHIFT+J': 'justifyFull',
                      'CTRL+SHIFT+NUM7': 'insertUnorderedList',
                      'CTRL+SHIFT+NUM8': 'insertOrderedList',
                      'CTRL+LEFTBRACKET': 'outdent',
                      'CTRL+RIGHTBRACKET': 'indent',
                      'CTRL+NUM0': 'formatPara',
                      'CTRL+NUM1': 'formatH1',
                      'CTRL+NUM2': 'formatH2',
                      'CTRL+NUM3': 'formatH3',
                      'CTRL+NUM4': 'formatH4',
                      'CTRL+NUM5': 'formatH5',
                      'CTRL+NUM6': 'formatH6',
                      'CTRL+ENTER': 'insertHorizontalRule',
                      'CTRL+K': 'linkDialog.show'
                  },
  
                  mac: {
                      'ENTER': 'insertParagraph',
                      'CMD+Z': 'undo',
                      'CMD+SHIFT+Z': 'redo',
                      'TAB': 'tab',
                      'SHIFT+TAB': 'untab',
                      'CMD+B': 'bold',
                      'CMD+I': 'italic',
                      'CMD+U': 'underline',
                      'CMD+SHIFT+S': 'strikethrough',
                      'CMD+BACKSLASH': 'removeFormat',
                      'CMD+SHIFT+L': 'justifyLeft',
                      'CMD+SHIFT+E': 'justifyCenter',
                      'CMD+SHIFT+R': 'justifyRight',
                      'CMD+SHIFT+J': 'justifyFull',
                      'CMD+SHIFT+NUM7': 'insertUnorderedList',
                      'CMD+SHIFT+NUM8': 'insertOrderedList',
                      'CMD+LEFTBRACKET': 'outdent',
                      'CMD+RIGHTBRACKET': 'indent',
                      'CMD+NUM0': 'formatPara',
                      'CMD+NUM1': 'formatH1',
                      'CMD+NUM2': 'formatH2',
                      'CMD+NUM3': 'formatH3',
                      'CMD+NUM4': 'formatH4',
                      'CMD+NUM5': 'formatH5',
                      'CMD+NUM6': 'formatH6',
                      'CMD+ENTER': 'insertHorizontalRule',
                      'CMD+K': 'linkDialog.show'
                  }
              },
              icons: {
                  'align': 'note-icon-align',
                  'alignCenter': 'note-icon-align-center',
                  'alignJustify': 'note-icon-align-justify',
                  'alignLeft': 'note-icon-align-left',
                  'alignRight': 'note-icon-align-right',
                  'rowBelow': 'note-icon-row-below',
                  'colBefore': 'note-icon-col-before',
                  'colAfter': 'note-icon-col-after',
                  'rowAbove': 'note-icon-row-above',
                  'rowRemove': 'note-icon-row-remove',
                  'colRemove': 'note-icon-col-remove',
                  'indent': 'note-icon-align-indent',
                  'outdent': 'note-icon-align-outdent',
                  'arrowsAlt': 'note-icon-arrows-alt',
                  'bold': 'note-icon-bold',
                  'caret': 'note-icon-caret',
                  'circle': 'note-icon-circle',
                  'close': 'note-icon-close',
                  'code': 'note-icon-code',
                  'eraser': 'note-icon-eraser',
                  'font': 'note-icon-font',
                  'frame': 'note-icon-frame',
                  'italic': 'note-icon-italic',
                  'link': 'note-icon-link',
                  'unlink': 'note-icon-chain-broken',
                  'magic': 'note-icon-magic',
                  'menuCheck': 'note-icon-menu-check',
                  'minus': 'note-icon-minus',
                  'orderedlist': 'note-icon-orderedlist',
                  'pencil': 'note-icon-pencil',
                  'picture': 'note-icon-picture',
                  'question': 'note-icon-question',
                  'redo': 'note-icon-redo',
                  'square': 'note-icon-square',
                  'strikethrough': 'note-icon-strikethrough',
                  'subscript': 'note-icon-subscript',
                  'superscript': 'note-icon-superscript',
                  'table': 'note-icon-table',
                  'textHeight': 'note-icon-text-height',
                  'trash': 'note-icon-trash',
                  'underline': 'note-icon-underline',
                  'undo': 'note-icon-undo',
                  'unorderedlist': 'note-icon-unorderedlist',
                  'video': 'note-icon-video'
              }
          }
      });
  
  }));
  