/**

 * Super simple wysiwyg editor v0.8.1

 * http://summernote.org/

 *

 * summernote.js

 * Copyright 2013-2015 Alan Hong. and other contributors

 * summernote may be freely distributed under the MIT license./

 *

 * Date: 2016-02-15T18:35Z

 */

(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';



  /**

   * @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

     *

     * @param {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

     *

     * @param {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.

     * @param {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;

    };



    /**

     * @param {String} namespace

     * @param {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('');

    };



    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

    };

  })();



  /**

   * @class core.list

   *

   * list utils

   *

   * @singleton

   * @alternateClassName list

   */

  var list = (function () {

    /**

     * returns the first item of an array.

     *

     * @param {Array} array

     */

    var head = function (array) {

      return array[0];

    };



    /**

     * returns the last item of an array.

     *

     * @param {Array} array

     */

    var last = function (array) {

      return array[array.length - 1];

    };



    /**

     * returns everything but the last entry of the array.

     *

     * @param {Array} array

     */

    var initial = function (array) {

      return array.slice(0, array.length - 1);

    };



    /**

     * returns the rest of the items in an array.

     *

     * @param {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

     *

     * @param {Array} array - array

     * @param {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.

     * @param {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.

     *

     * @param {Array} array - array

     * @param {Function} fn - predicate function for cluster rule

     * @param {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 falsy values removed

     *

     * @param {Array} array - array

     * @param {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

     *

     * @param {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.

     * @param {Array} array

     */

    var next = function (array, item) {

      var idx = indexOf(array, item);

      if (idx === -1) { return null; }



      return array[idx + 1];

    };



    /**

     * returns prev item.

     * @param {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 isSupportAmd = typeof define === 'function' && define.amd;



  /**

   * returns whether font is installed or not.

   *

   * @param {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 && require) {

    if (require.hasOwnProperty('resolve')) {

      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) {

        hasCodeMirror = false;

      }

    } else if (require.hasOwnProperty('specified')) {

      hasCodeMirror = require.specified('codemirror');

    }

  }



  /**

   * @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,

    hasCodeMirror: hasCodeMirror,

    isFontInstalled: isFontInstalled,

    isW3CRangeSupport: !!document.createRange

  };





  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.

     *

     * @param {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.

     *

     * @param {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

     *

     * @param {String} nodeName

     * @return {Function}

     */

    var makePredByNodeName = function (nodeName) {

      nodeName = nodeName.toUpperCase();

      return function (node) {

        return node && node.nodeName.toUpperCase() === nodeName;

      };

    };



    /**

     * @method isText

     *

     *

     *

     * @param {Node} node

     * @return {Boolean} true if node's type is text(3)

     */

    var isText = function (node) {

      return node && node.nodeType === 3;

    };



    /**

     * @method isElement

     *

     *

     *

     * @param {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/.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 isInline = function (node) {

      return !isBodyContainer(node) &&

             !isList(node) &&

             !isHr(node) &&

             !isPara(node) &&

             !isTable(node) &&

             !isBlockquote(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

     *

     * @param {Node} nodeA

     * @param {Node} nodeB

     * @return {Boolean}

     */

    var isClosestSibling = function (nodeA, nodeB) {

      return nodeA.nextSibling === nodeB ||

             nodeA.previousSibling === nodeB;

    };



    /**

     * returns array of closest siblings with node

     *

     * @param {Node} node

     * @param {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

     *

     * @param {Node} node

     */

    var nodeLength = function (node) {

      if (isText(node)) {

        return node.nodeValue.length;

      }



      return node.childNodes.length;

    };



    /**

     * returns whether node is empty or not.

     *

     * @param {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

     *

     * @param {Node} node

     * @param {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

     *

     * @param {Node} node

     * @param {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).

     *

     * @param {Node} node

     * @param {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.

     *

     * @param {Node} nodeA

     * @param {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).

     *

     * @param {Node} node

     * @param {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).

     *

     * @param {Node} node

     * @param {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

     *

     * @param {Node} node

     * @param {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.

     *

     * @param {Node} node

     * @param {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

     *

     * @param {Node} node

     * @param {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.

     *

     * @param {Node} node

     * @param {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.

     *

     * @param {BoundaryPoint} point

     * @return {Boolean}

     */

    var isLeftEdgePoint = function (point) {

      return point.offset === 0;

    };



    /**

     * returns whether boundaryPoint is right edge or not.

     *

     * @param {BoundaryPoint} point

     * @return {Boolean}

     */

    var isRightEdgePoint = function (point) {

      return point.offset === nodeLength(point.node);

    };



    /**

     * returns whether boundaryPoint is edge or not.

     *

     * @param {BoundaryPoint} point

     * @return {Boolean}

     */

    var isEdgePoint = function (point) {

      return isLeftEdgePoint(point) || isRightEdgePoint(point);

    };



    /**

     * returns whether node is left edge of ancestor or not.

     *

     * @param {Node} node

     * @param {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.

     *

     * @param {Node} node

     * @param {Node} ancestor

     * @return {Boolean}

     */

    var isRightEdgeOf = function (node, ancestor) {

      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.

     * @param {BoundaryPoint} point

     * @param {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.

     * @param {BoundaryPoint} point

     * @param {Node} ancestor

     * @return {Boolean}

     */

    var isRightEdgePointOf = function (point, ancestor) {

      return isRightEdgePoint(point) && isRightEdgeOf(point.node, ancestor);

    };



    /**

     * returns offset from parent.

     *

     * @param {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

     *

     * @param {BoundaryPoint} point

     * @param {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

     *

     * @param {BoundaryPoint} point

     * @param {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.

     *

     * @param {BoundaryPoint} pointA

     * @param {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.

     * 

     * @param {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

     *

     * @param {BoundaryPoint} point

     * @param {Function} pred

     * @return {BoundaryPoint}

     */

    var prevPointUntil = function (point, pred) {

      while (point) {

        if (pred(point)) {

          return point;

        }



        point = prevPoint(point);

      }



      return null;

    };



    /**

     * @method nextPointUntil

     *

     * @param {BoundaryPoint} point

     * @param {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.

     *

     * @param {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

     *

     * @param {BoundaryPoint} startPoint

     * @param {BoundaryPoint} endPoint

     * @param {Function} handler

     * @param {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

     *

     * @param {Node} ancestor - ancestor node

     * @param {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)

     *

     * @param {Node} ancestor - ancestor node

     * @param {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

     *

     * @param {BoundaryPoint} point

     * @param {Object} [options]

     * @param {Boolean} [options.isSkipPaddingBlankHTML] - default: false

     * @param {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

     *

     * @param {Node} root - split root

     * @param {BoundaryPoint} point

     * @param {Object} [options]

     * @param {Boolean} [options.isSkipPaddingBlankHTML] - default: false

     * @param {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

     *

     * @param {Point} point

     * @param {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)

     *

     * @param {Node} node

     * @param {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

     *

     * @param {Node} node

     * @param {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

     *

     * @param {Node} node

     * @param {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');



    /**

     * @param {jQuery} $node

     * @param {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

     *

     * @param {jQuery} $node

     * @param {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]);

      });

    };



    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,

      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

    };

  })();



  /**

   * @param {jQuery} $note

   * @param {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);

      });

    };



    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.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 = 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];

    };



    this.createInvokeHandler = function (namespace, value) {

      return function (event) {

        event.preventDefault();

        self.invoke(namespace, value || $(event.target).closest('[data-value]').data('value'));

      };

    };



    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

     *

     * @param {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);

      options.langInfo = $.extend(true, {}, $.summernote.lang['en-US'], $.summernote.lang[options.lang]);



      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 button = renderer.create('<button type="button" class="note-btn btn btn-default btn-sm">', function ($node, options) {

    if (options && options.tooltip) {

      $node.attr({

        title: options.tooltip

      }).tooltip({

        container: 'body',

        trigger: 'hover',

        placement: 'bottom'

      });

    }

  });



  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;

      return '<li><a href="#" data-value="' + value + '">' + content + '</a></li>';

    }).join('') : options.items;



    $node.html(markup);

  });



  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(''));



    $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 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,

    button: button,

    dropdown: dropdown,

    dropdownCheck: dropdownCheck,

    palette: palette,

    dialog: dialog,

    popover: popover,

    icon: icon,



    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) {

      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'

      },

      hr: {

        insert: 'Insert Horizontal Rule'

      },

      style: {

        style: 'Style',

        normal: '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,



      // 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

       *

       * @param {Number} keyCode

       * @return {Boolean}

       */

      isEdit: function (keyCode) {

        return list.contains([

          keyMap.BACKSPACE,

          keyMap.TAB,

          keyMap.ENTER,

          keyMap.SPACE

        ], keyCode);

      },

      /**

       * @method isMove

       *

       * @param {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

     *

     * @param {TextRange} textRange

     * @param {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)

     * @param {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

     * @param {Node} sc - start container

     * @param {Number} so - start offset

     * @param {Node} ec - end container

     * @param {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 () {



        /**

         * @param {BoundaryPoint} point

         * @param {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

       *

       * @param {Function} [pred] - predicate function

       * @param {Object} [options]

       * @param {Boolean} [options.includeAncestor]

       * @param {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

       *

       * @param {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

        );

      };



      /**

       * @param {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);

      // isOnAnchor: judge whether range is on cell node or not

      this.isOnCell = makeIsOn(dom.isCell);



      /**

       * @param {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

       *

       * @param {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

       *

       * @param {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

       *

       * @param {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

       *

       * @param {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

       *

       * @param {Node} sc - start container

       * @param {Number} so - start offset

       * @param {Node} ec - end container

       * @param {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

       *

       * @param {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

       *

       * @param {Node} node

       * @return {WrappedRange}

       */

      createFromNodeBefore: function (node) {

        return this.createFromNode(node).collapse(true);

      },



      /**

       * create WrappedRange from node after position

       *

       * @param {Node} node

       * @return {WrappedRange}

       */

      createFromNodeAfter: function (node) {

        return this.createFromNode(node).collapse();

      },



      /**

       * @method 

       * 

       * create WrappedRange from bookmark

       *

       * @param {Node} editable

       * @param {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

       *

       * @param {Object} bookmark

       * @param {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

     *

     * @param {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

     *

     * @param {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

     * @param  {jQuery} $obj

     * @param  {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

     *

     * @param {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

     *

     * @param {WrappedRange} rng

     * @param {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.

     *

     * @param {WrappedRange} rng

     * @param {Object} [options] - options for styleNodes

     * @param {String} [options.nodeName] - default: `SPAN`

     * @param {Boolean} [options.expandClosestSibling] - default: `false`

     * @param {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

     *

     * @param {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'

        });

      } 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

     *

     * @param {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();

    };



    /**

     * @param {Node[]} paras

     * @param {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

     *

     * @param {Array[]} clustereds

     * @param {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

     *

     * @param {WrappedRange} rng

     * @param {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 or pre with P tag

          if ((dom.isHeading(nextPara) || dom.isPre(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 editing.Table

   *

   * Table

   *

   */

  var Table = function () {

    /**

     * handle tab key

     *

     * @param {WrappedRange} rng

     * @param {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();

      }

    };



    /**

     * create empty table element

     *

     * @param {Number} rowCount

     * @param {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];

    };

  };





  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 (options.shortcuts && !event.isDefaultPrevented()) {

          self.handleKeyMap(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, function () {

        context.triggerEvent('change', $editable.html());

      });



      $editor.on('focusin', function (event) {

        context.triggerEvent('focusin', event);

      }).on('focusout', function (event) {

        context.triggerEvent('focusout', event);

      });



      if (!options.airMode && options.height) {

        this.setHeight(options.height);

      }

      if (!options.airMode && options.maxHeight) {

        $editable.css('max-height', options.maxHeight);

      }

      if (!options.airMode && 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();

      }

    };



    /**

     * create range

     * @return {WrappedRange}

     */

    this.createRange = function () {

      this.focus();

      return range.create(editable);

    };



    /**

     * saveRange

     *

     * save current range

     *

     * @param {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

     *

     * @param {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

     * @param {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', 'foreColor', '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

     *

     * @param {String} src

     * @param {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

     * @param {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

     * @param {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

     * @param {Node} node

     */

    this.insertNode = this.wrapCommand(function (node) {

      var rng = this.createRange();

      rng.insertNode(node);

      range.createFromNodeAfter(node).select();

    });



    /**

     * insert text

     * @param {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

     * @param {String} markup

     */

    this.pasteHTML = this.wrapCommand(function (markup) {

      var contents = this.createRange().pasteHTML(markup);

      range.createFromNodeAfter(list.last(contents)).select();

    });



    /**

     * formatBlock

     *

     * @param {String} tagName

     */

    this.formatBlock = this.wrapCommand(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

     *

     * @param {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

     * @param {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)

     *

     * @param {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;



      if (options.onCreateLink) {

        linkUrl = options.onCreateLink(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)));



      return {

        range: rng,

        text: rng.toString(),

        isNewWindow: $anchor.length ? $anchor.attr('target') === '_blank' : false,

        url: $anchor.length ? $anchor.attr('href') : ''

      };

    };



    /**

     * setting color

     *

     * @param {Object} sObjColor  color code

     * @param {String} sObjColor.foreColor foreground color

     * @param {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); }

    });



    /**

     * insert Table

     *

     * @param {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));

    });



    /**

     * float me

     *

     * @param {String} value

     */

    this.floatMe = this.wrapCommand(function (value) {

      var $target = $(this.restoreTarget());

      $target.css('float', value);

    });



    /**

     * resize overlay element

     * @param {String} value

     */

    this.resize = this.wrapCommand(function (value) {

      var $target = $(this.restoreTarget());

      $target.css({

        width: value * 100 + '%',

        height: ''

      });

    });



    /**

     * @param {Position} pos

     * @param {jQuery} $target - target element

     * @param {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);

    };



    /**

     * set height for editable

     */

    this.setHeight = function (height) {

      $editable.outerHeight(height);

    };

  };



  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 />').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;



      if (dom.isImg(node)) {

        var dataURI = node.src;

        var decodedData = atob(dataURI.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

     *

     * @param {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 $dropzone = $([

      '<div class="note-dropzone">',

      '  <div class="note-dropzone-message"/>',

      '</div>'

    ].join('')).prependTo($editor);



    /**

     * attach Drag and Drop Events

     */

    this.initialize = function () {

      if (options.disableDragAndDrop) {

        // prevent default drop event

        $document.on('drop', function (e) {

          e.preventDefault();

        });

      } else {

        this.attachDragAndDropEvent();

      }

    };



    /**

     * attach Drag and Drop Events

     */

    this.attachDragAndDropEvent = function () {

      var collection = $(),

          $dropzoneMessage = $dropzone.find('.note-dropzone-message');



      // 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', 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);

      }).on('dragleave', function (e) {

        collection = collection.not(e.target);

        if (!collection.length) {

          $editor.removeClass('dragover');

        }

      }).on('drop', function () {

        collection = $();

        $editor.removeClass('dragover');

      });



      // 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

    };

  };





  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) {

        return;

      }



      $statusbar.on('mousedown', function (event) {

        event.preventDefault();

        event.stopPropagation();



        var editableTop = $editable.offset().top - $document.scrollTop();



        $document.on('mousemove', 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);

        }).one('mouseup', function () {

          $document.off('mousemove');

        });

      });

    };



    this.destroy = function () {

      $statusbar.off();

    };

  };



  var Fullscreen = function (context) {

    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');



    /**

     * toggle fullscreen

     */

    this.toggle = function () {

      var resize = function (size) {

        $editable.css('height', size.h);

        $codable.css('height', size.h);

        if ($codable.data('cmeditor')) {

          $codable.data('cmeditor').setsize(null, size.h);

        }

      };



      $editor.toggleClass('fullscreen');

      if (this.isFullscreen()) {

        $editable.data('orgHeight', $editable.css('height'));



        $window.on('resize', function () {

          resize({

            h: $window.height() - $toolbar.outerHeight()

          });

        }).trigger('resize');



        $scrollbar.css('overflow', 'hidden');

      } else {

        $window.off('resize');

        resize({

          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();

      }

    };



    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();



          $document.on('mousemove', function (event) {

            context.invoke('editor.resizeTo', {

              x: event.clientX - posStart.left,

              y: event.clientY - (posStart.top - scrollTop)

            }, $target, !event.shiftKey);



            self.update($target[0]);

          }).one('mouseup', function (e) {

            e.preventDefault();

            $document.off('mousemove');

            context.invoke('editor.afterCommand');

          });



          if (!$target.data('ratio')) { // original ratio.

            $target.data('ratio', $target.height() / $target.width());

          }

        }

      });

    };



    this.destroy = function () {

      this.$handle.remove();

    };



    this.update = function (target) {

      var isImage = dom.isImg(target);

      var $selection = this.$handle.find('.note-control-selection');



      context.invoke('imagePopover.update', target);



      if (isImage) {

        var $image = $(target);

        var pos = $image.position();



        // include margin

        var imageSize = {

          w: $image.outerWidth(true),

          h: $image.outerHeight(true)

        };



        $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

     *

     * @param {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 = /^(https?:\/\/|ssh:\/\/|ftp:\/\/|file:\/|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.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 (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.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.icon(options.icons.magic) + ' ' + ui.icon(options.icons.caret, 'span'),

            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: item };

              }



              var tag = item.tag;

              var title = item.title;

              var style = item.style ? ' style="' + item.style + '" ' : '';

              var className = item.className ? ' className="' + 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.createInvokeHandler('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.createInvokeHandler('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.createInvokeHandler('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.createInvokeHandler('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.createInvokeHandler('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.createInvokeHandler('editor.subscript')

        }).render();

      });



      context.memo('button.fontname', function () {

        return ui.buttonGroup([

          ui.button({

            className: 'dropdown-toggle',

            contents: '<span class="note-current-fontname"/> ' + ui.icon(options.icons.caret, 'span'),

            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.createInvokeHandler('editor.fontName')

          })

        ]).render();

      });



      context.memo('button.fontsize', function () {

        return ui.buttonGroup([

          ui.button({

            className: 'dropdown-toggle',

            contents: '<span class="note-current-fontsize"/>' + ui.icon(options.icons.caret, 'span'),

            tooltip: lang.font.size,

            data: {

              toggle: 'dropdown'

            }

          }),

          ui.dropdownCheck({

            className: 'dropdown-fontsize',

            checkClassName: options.icons.menuCheck,

            items: options.fontSizes,

            click: context.createInvokeHandler('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.icon(options.icons.caret, 'span'),

              tooltip: lang.color.more,

              data: {

                toggle: 'dropdown'

              }

            }),

            ui.dropdown({

              items: [

                '<li>',

                '<div class="btn-group">',

                '  <div class="note-palette-title">' + lang.color.background + '</div>',

                '  <div>',

                '    <button type="button" class="note-color-reset btn btn-default" data-event="backColor" data-value="inherit">',

                lang.color.transparent,

                '    </button>',

                '  </div>',

                '  <div class="note-holder" data-event="backColor"/>',

                '</div>',

                '<div class="btn-group">',

                '  <div class="note-palette-title">' + lang.color.foreground + '</div>',

                '  <div>',

                '    <button type="button" class="note-color-reset btn btn-default" data-event="removeFormat" data-value="foreColor">',

                lang.color.resetToDefault,

                '    </button>',

                '  </div>',

                '  <div class="note-holder" data-event="foreColor"/>',

                '</div>',

                '</li>'

              ].join(''),

              callback: function ($dropdown) {

                $dropdown.find('.note-holder').each(function () {

                  var $holder = $(this);

                  $holder.append(ui.palette({

                    colors: options.colors,

                    eventName: $holder.data('event')

                  }).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.icon(options.icons.alignLeft) + ' ' + ui.icon(options.icons.caret, 'span'),

            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.icon(options.icons.textHeight) + ' ' + ui.icon(options.icons.caret, 'span'),

            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.icon(options.icons.table) + ' ' + ui.icon(options.icons.caret, 'span'),

            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,

          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();

      });

    };



    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);

      }

    };



    this.updateCurrentStyle = function () {

      var styleInfo = context.invoke('editor.currentStyle');

      this.updateBtnStates({

        '.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);



        $toolbar.find('.dropdown-fontname li a').each(function () {

          // always compare string to avoid creating another func.

          var isChecked = ($(this).data('value') + '') === (fontName + '');

          this.className = isChecked ? 'checked' : '';

        });

        $toolbar.find('.note-current-fontname').text(fontName);

      }



      if (styleInfo['font-size']) {

        var fontSize = styleInfo['font-size'];

        $toolbar.find('.dropdown-fontsize li a').each(function () {

          // always compare with string to avoid creating another func.

          var isChecked = ($(this).data('value') + '') === (fontSize + '');

          this.className = isChecked ? 'checked' : '';

        });

        $toolbar.find('.note-current-fontsize').text(fontSize);

      }



      if (styleInfo['line-height']) {

        var lineHeight = styleInfo['line-height'];

        $toolbar.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 (infos) {

      $.each(infos, function (selector, pred) {

        ui.toggleBtnActive($toolbar.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 $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);

      }



      $note.on('summernote.keyup summernote.mouseup summernote.change', function () {

        context.invoke('buttons.updateCurrentStyle');

      });



      context.invoke('buttons.updateCurrentStyle');

    };



    this.destroy = function () {

      $toolbar.children().remove();

    };



    this.updateFullscreen = function (isFullscreen) {

      ui.toggleBtnActive($toolbar.find('.btn-fullscreen'), 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">' +

                   '<label>' + lang.link.textToDisplay + '</label>' +

                   '<input class="note-link-text form-control" type="text" />' +

                 '</div>' +

                 '<div class="form-group">' +

                   '<label>' + lang.link.url + '</label>' +

                   '<input class="note-link-url form-control" type="text" value="http://" />' +

                 '</div>' +

                 (!options.disableLinkTarget ?

                   '<div class="checkbox">' +

                     '<label>' + '<input type="checkbox" checked> ' + lang.link.openInNewWindow + '</label>' +

                   '</div>' : ''

                 );

      var footer = '<button href="#" class="btn 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');

        }

      });

    };



    /**

     * Show link dialog and set event handlers on dialog controls.

     *

     * @param {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');



          $linkText.val(linkInfo.text);



          $linkText.on('input', function () {

            ui.toggleBtn($linkBtn, $linkText.val() && $linkUrl.val());

            // if linktext was modified by keyup,

            // stop cloning text from linkUrl

            linkInfo.text = $linkText.val();

          });



          // if no url was given, copy text to url

          if (!linkInfo.url) {

            linkInfo.url = linkInfo.text || 'http://';

            ui.toggleBtn($linkBtn, linkInfo.text);

          }



          $linkUrl.on('input', function () {

            ui.toggleBtn($linkBtn, $linkText.val() && $linkUrl.val());

            // display same link on `Text to display` input

            // when create a new link

            if (!linkInfo.text) {

              $linkText.val($linkUrl.val());

            }

          }).val(linkInfo.url).trigger('focus');



          self.bindEnterKey($linkUrl, $linkBtn);

          self.bindEnterKey($linkText, $linkBtn);



          $openInNewWindow.prop('checked', linkInfo.isNewWindow);



          $linkBtn.one('click', function (event) {

            event.preventDefault();



            deferred.resolve({

              range: linkInfo.range,

              url: $linkUrl.val(),

              text: $linkText.val(),

              isNewWindow: $openInNewWindow.is(':checked')

            });

            self.$dialog.modal('hide');

          });

        });



        ui.onDialogHidden(self.$dialog, function () {

          // detach events

          $linkText.off('input keypress');

          $linkUrl.off('input keypress');

          $linkBtn.off('click');



          if (deferred.state() === 'pending') {

            deferred.reject();

          }

        });



        ui.showDialog(self.$dialog);

      }).promise();

    };



    /**

     * @param {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.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');

          $content.prepend('<span><a target="_blank"></a>&nbsp;</span>');

        }

      }).render().appendTo('body');

      var $content = this.$popover.find('.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-group-select-from-files">' +

                   '<label>' + lang.image.selectFromFiles + '</label>' +

                   '<input class="note-image-input form-control" type="file" name="files" accept="image/*" multiple="multiple" />' +

                   imageLimitation +

                 '</div>' +

                 '<div class="form-group" style="overflow:auto;">' +

                   '<label>' + lang.image.url + '</label>' +

                   '<input class="note-image-url form-control col-md-12" type="text" />' +

                 '</div>';

      var footer = '<button href="#" class="btn 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

     *

     * @param {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);

      });

    };

  };



  var ImagePopover = function (context) {

    var ui = $.summernote.ui;



    var options = context.options;



    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');



      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);

        this.$popover.css({

          display: 'block',

          left: pos.left,

          top: pos.top

        });

      } else {

        this.hide();

      }

    };



    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 row-fluid">' +

          '<label>' + lang.video.url + ' <small class="text-muted">' + lang.video.providers + '</small></label>' +

          '<input class="note-video-url form-control span12" type="text" />' +

          '</div>';

      var footer = '<button href="#" class="btn 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 = /\/\/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]*\/)*([0-9]{6,11})[?]?.*/;

      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 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', igMatch[0] + '/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 (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

     *

     * @param {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="//summernote.org/" target="_blank">Summernote 0.8.1</a> · ',

        '<a href="//github.com/summernote/summernote" target="_blank">Project</a> · ',

        '<a href="//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').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.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

          });

        }

      } 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.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');



      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);

        this.lastWordRange.insertNode(node);

        range.createFromNode(node).collapse().select();



        this.lastWordRange = null;

        this.hide();

        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: '0.8.1',

    ui: ui,



    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,

        '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']]

        ],

        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,



      focus: false,

      tabSize: 4,

      styleWithSpan: true,

      shortcuts: true,

      textareaAutoSync: true,

      direction: null,



      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,

        onSubmit: 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',

        '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-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'

      }

    }

  });



}));

