/**
 * Super simple wysiwyg editor v0.8.6
 * http://summernote.org/
 *
 * summernote.js
 * Copyright 2013- Alan Hong. and other contributors
 * summernote may be freely distributed under the MIT license./
 *
 * Date: 2017-07-16T16:33Z
 */
(function (factory) {
  /* global define */
  if (typeof define === "function" && define.amd) {
    // AMD. Register as an anonymous module.
    define(["jquery"], factory);
  } else if (typeof module === "object" && module.exports) {
    // Node/CommonJS
    module.exports = factory(require("jquery"));
  } else {
    // Browser globals
    factory(window.jQuery);
  }
})(function ($) {
  "use strict";

  var isSupportAmd = typeof define === "function" && define.amd;

  /**
   * returns whether font is installed or not.
   *
   * @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 && typeof require !== "undefined") {
    if (typeof require.resolve !== "undefined") {
      try {
        // If CodeMirror can't be resolved, `require.resolve` will throw an
        // exception and `hasCodeMirror` won't be set to `true`.
        require.resolve("codemirror");
        hasCodeMirror = true;
      } catch (e) {
        // Do nothing.
      }
    } else if (typeof eval("require").specified !== "undefined") {
      hasCodeMirror = eval("require").specified("codemirror");
    }
  }

  var isSupportTouch =
    "ontouchstart" in window ||
    navigator.MaxTouchPoints > 0 ||
    navigator.msMaxTouchPoints > 0;

  /**
   * @class core.agent
   *
   * Object which check platform and agent
   *
   * @singleton
   * @alternateClassName agent
   */
  var agent = {
    isMac: navigator.appVersion.indexOf("Mac") > -1,
    isMSIE: isMSIE,
    isEdge: isEdge,
    isFF: !isEdge && /firefox/i.test(userAgent),
    isPhantom: /PhantomJS/i.test(userAgent),
    isWebkit: !isEdge && /webkit/i.test(userAgent),
    isChrome: !isEdge && /chrome/i.test(userAgent),
    isSafari: !isEdge && /safari/i.test(userAgent),
    browserVersion: browserVersion,
    jqueryVersion: parseFloat($.fn.jquery),
    isSupportAmd: isSupportAmd,
    isSupportTouch: isSupportTouch,
    hasCodeMirror: hasCodeMirror,
    isFontInstalled: isFontInstalled,
    isW3CRangeSupport: !!document.createRange,
  };

  /**
   * @class core.func
   *
   * func utils (for high-order func's arg)
   *
   * @singleton
   * @alternateClassName func
   */
  var func = (function () {
    var eq = function (itemA) {
      return function (itemB) {
        return itemA === itemB;
      };
    };

    var eq2 = function (itemA, itemB) {
      return itemA === itemB;
    };

    var peq2 = function (propName) {
      return function (itemA, itemB) {
        return itemA[propName] === itemB[propName];
      };
    };

    var ok = function () {
      return true;
    };

    var fail = function () {
      return false;
    };

    var not = function (f) {
      return function () {
        return !f.apply(f, arguments);
      };
    };

    var and = function (fA, fB) {
      return function (item) {
        return fA(item) && fB(item);
      };
    };

    var self = function (a) {
      return a;
    };

    var invoke = function (obj, method) {
      return function () {
        return obj[method].apply(obj, arguments);
      };
    };

    var idCounter = 0;

    /**
     * generate a globally-unique id
     *
     * @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("")
      );
    };

    /**
     * Returns a function, that, as long as it continues to be invoked, will not
     * be triggered. The function will be called after it stops being called for
     * N milliseconds. If `immediate` is passed, trigger the function on the
     * leading edge, instead of the trailing.
     * @param {Function} func
     * @param {Number} wait
     * @param {Boolean} immediate
     * @return {Function}
     */
    var debounce = function (func, wait, immediate) {
      var timeout;
      return function () {
        var context = this,
          args = arguments;
        var later = function () {
          timeout = null;
          if (!immediate) {
            func.apply(context, args);
          }
        };
        var callNow = immediate && !timeout;
        clearTimeout(timeout);
        timeout = setTimeout(later, wait);
        if (callNow) {
          func.apply(context, args);
        }
      };
    };

    return {
      eq: eq,
      eq2: eq2,
      peq2: peq2,
      ok: ok,
      fail: fail,
      self: self,
      not: not,
      and: and,
      invoke: invoke,
      uniqueId: uniqueId,
      rect2bnd: rect2bnd,
      invertObject: invertObject,
      namespaceToCamel: namespaceToCamel,
      debounce: debounce,
    };
  })();

  /**
   * @class core.list
   *
   * list utils
   *
   * @singleton
   * @alternateClassName list
   */
  var list = (function () {
    /**
     * returns the first item of an array.
     *
     * @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 false 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 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|^INPUT/.test(node.nodeName.toUpperCase())
      );
    };

    var isPara = function (node) {
      if (isEditable(node)) {
        return false;
      }

      // Chrome(v31.0), FF(v25.0.1) use DIV for paragraph
      return node && /^DIV|^P|^LI|^H[1-7]/.test(node.nodeName.toUpperCase());
    };

    var isHeading = function (node) {
      return node && /^H[1-7]/.test(node.nodeName.toUpperCase());
    };

    var isPre = makePredByNodeName("PRE");

    var isLi = makePredByNodeName("LI");

    var isPurePara = function (node) {
      return isPara(node) && !isLi(node);
    };

    var isTable = makePredByNodeName("TABLE");

    var isData = makePredByNodeName("DATA");

    var isInline = function (node) {
      return (
        !isBodyContainer(node) &&
        !isList(node) &&
        !isHr(node) &&
        !isPara(node) &&
        !isTable(node) &&
        !isBlockquote(node) &&
        !isData(node)
      );
    };

    var isList = function (node) {
      return node && /^UL|^OL/.test(node.nodeName.toUpperCase());
    };

    var isHr = makePredByNodeName("HR");

    var isCell = function (node) {
      return node && /^TD|^TH/.test(node.nodeName.toUpperCase());
    };

    var isBlockquote = makePredByNodeName("BLOCKQUOTE");

    var isBodyContainer = function (node) {
      return isCell(node) || isBlockquote(node) || isEditable(node);
    };

    var isAnchor = makePredByNodeName("A");

    var isParaInline = function (node) {
      return isInline(node) && !!ancestor(node, isPara);
    };

    var isBodyInline = function (node) {
      return isInline(node) && !ancestor(node, isPara);
    };

    var isBody = makePredByNodeName("BODY");

    /**
     * returns whether nodeB is closest sibling of nodeA
     *
     * @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;
      }

      if (node) {
        return node.childNodes.length;
      }

      return 0;
    };

    /**
     * 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) {
      if (!ancestor) {
        return false;
      }
      while (node && node !== ancestor) {
        if (position(node) !== nodeLength(node.parentNode) - 1) {
          return false;
        }
        node = node.parentNode;
      }

      return true;
    };

    /**
     * returns whether point is left edge of ancestor or not.
     * @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]);
      });
    };

    /**
     * @method isCustomStyleTag
     *
     * assert if a node contains a "note-styletag" class,
     * which implies that's a custom-made style tag node
     *
     * @param {Node} an HTML DOM node
     */
    var isCustomStyleTag = function (node) {
      return (
        node &&
        !dom.isText(node) &&
        list.contains(node.classList, "note-styletag")
      );
    };

    return {
      /** @property {String} NBSP_CHAR */
      NBSP_CHAR: NBSP_CHAR,
      /** @property {String} ZERO_WIDTH_NBSP_CHAR */
      ZERO_WIDTH_NBSP_CHAR: ZERO_WIDTH_NBSP_CHAR,
      /** @property {String} blank */
      blank: blankHTML,
      /** @property {String} emptyPara */
      emptyPara: "<p>" + blankHTML + "</p>",
      makePredByNodeName: makePredByNodeName,
      isEditable: isEditable,
      isControlSizing: isControlSizing,
      isText: isText,
      isElement: isElement,
      isVoid: isVoid,
      isPara: isPara,
      isPurePara: isPurePara,
      isHeading: isHeading,
      isInline: isInline,
      isBlock: func.not(isInline),
      isBodyInline: isBodyInline,
      isBody: isBody,
      isParaInline: isParaInline,
      isPre: isPre,
      isList: isList,
      isTable: isTable,
      isData: isData,
      isCell: isCell,
      isBlockquote: isBlockquote,
      isBodyContainer: isBodyContainer,
      isAnchor: isAnchor,
      isDiv: makePredByNodeName("DIV"),
      isLi: isLi,
      isBR: makePredByNodeName("BR"),
      isSpan: makePredByNodeName("SPAN"),
      isB: makePredByNodeName("B"),
      isU: makePredByNodeName("U"),
      isS: makePredByNodeName("S"),
      isI: makePredByNodeName("I"),
      isImg: makePredByNodeName("IMG"),
      isTextarea: isTextarea,
      isEmpty: isEmpty,
      isEmptyAnchor: func.and(isAnchor, isEmpty),
      isClosestSibling: isClosestSibling,
      withClosestSiblings: withClosestSiblings,
      nodeLength: nodeLength,
      isLeftEdgePoint: isLeftEdgePoint,
      isRightEdgePoint: isRightEdgePoint,
      isEdgePoint: isEdgePoint,
      isLeftEdgeOf: isLeftEdgeOf,
      isRightEdgeOf: isRightEdgeOf,
      isLeftEdgePointOf: isLeftEdgePointOf,
      isRightEdgePointOf: isRightEdgePointOf,
      prevPoint: prevPoint,
      nextPoint: nextPoint,
      isSamePoint: isSamePoint,
      isVisiblePoint: isVisiblePoint,
      prevPointUntil: prevPointUntil,
      nextPointUntil: nextPointUntil,
      isCharPoint: isCharPoint,
      walkPoint: walkPoint,
      ancestor: ancestor,
      singleChildAncestor: singleChildAncestor,
      listAncestor: listAncestor,
      lastAncestor: lastAncestor,
      listNext: listNext,
      listPrev: listPrev,
      listDescendant: listDescendant,
      commonAncestor: commonAncestor,
      wrap: wrap,
      insertAfter: insertAfter,
      appendChildNodes: appendChildNodes,
      position: position,
      hasChildren: hasChildren,
      makeOffsetPath: makeOffsetPath,
      fromOffsetPath: fromOffsetPath,
      splitTree: splitTree,
      splitPoint: splitPoint,
      create: create,
      createText: createText,
      remove: remove,
      removeWhile: removeWhile,
      replace: replace,
      html: html,
      value: value,
      posFromPlaceholder: posFromPlaceholder,
      attachEvents: attachEvents,
      detachEvents: detachEvents,
      isCustomStyleTag: isCustomStyleTag,
    };
  })();

  /**
   * @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);
      });
      // trigger custom onDestroy callback
      this.triggerEvent("destroy", this);
    };

    this.code = function (html) {
      var isActivated = this.invoke("codeview.isActivated");

      if (html === undefined) {
        this.invoke("codeview.sync");
        return isActivated
          ? this.layoutInfo.codable.val()
          : this.layoutInfo.editable.html();
      } else {
        if (isActivated) {
          this.layoutInfo.codable.val(html);
        } else {
          this.layoutInfo.editable.html(html);
        }
        $note.val(html);
        this.triggerEvent("change", html);
      }
    };

    this.isDisabled = function () {
      return this.layoutInfo.editable.attr("contenteditable") === "false";
    };

    this.enable = function () {
      this.layoutInfo.editable.attr("contenteditable", true);
      this.invoke("toolbar.activate", true);
      this.triggerEvent("disable", false);
    };

    this.disable = function () {
      // close codeview if codeview is opend
      if (this.invoke("codeview.isActivated")) {
        this.invoke("codeview.deactivate");
      }
      this.layoutInfo.editable.attr("contenteditable", false);
      this.invoke("toolbar.deactivate", true);

      this.triggerEvent("disable", true);
    };

    this.triggerEvent = function () {
      var namespace = list.head(arguments);
      var args = list.tail(list.from(arguments));

      var callback = this.options.callbacks[
        func.namespaceToCamel(namespace, "on")
      ];
      if (callback) {
        callback.apply($note[0], args);
      }
      $note.trigger("summernote." + namespace, args);
    };

    this.initializeModule = function (key) {
      var module = this.modules[key];
      module.shouldInitialize = module.shouldInitialize || func.ok;
      if (!module.shouldInitialize()) {
        return;
      }

      // initialize module
      if (module.initialize) {
        module.initialize();
      }

      // attach events
      if (module.events) {
        dom.attachEvents($note, module.events);
      }
    };

    this.module = function (key, ModuleClass, withoutIntialize) {
      if (arguments.length === 1) {
        return this.modules[key];
      }

      this.modules[key] = new ModuleClass(this);

      if (!withoutIntialize) {
        this.initializeModule(key);
      }
    };

    this.removeModule = function (key) {
      var module = this.modules[key];
      if (module.shouldInitialize()) {
        if (module.events) {
          dom.detachEvents($note, module.events);
        }

        if (module.destroy) {
          module.destroy();
        }
      }

      delete this.modules[key];
    };

    this.memo = function (key, obj) {
      if (arguments.length === 1) {
        return this.memos[key];
      }
      this.memos[key] = obj;
    };

    this.removeMemo = function (key) {
      if (this.memos[key] && this.memos[key].destroy) {
        this.memos[key].destroy();
      }

      delete this.memos[key];
    };

    /**
     *Some buttons need to change their visual style immediately once they get pressed
     */
    this.createInvokeHandlerAndUpdateState = function (namespace, value) {
      return function (event) {
        self.createInvokeHandler(namespace, value)(event);
        self.invoke("buttons.updateCurrentStyle");
      };
    };

    this.createInvokeHandler = function (namespace, value) {
      return function (event) {
        event.preventDefault();
        var $target = $(event.target);
        self.invoke(
          namespace,
          value || $target.closest("[data-value]").data("value"),
          $target
        );
      };
    };

    this.invoke = function () {
      var namespace = list.head(arguments);
      var args = list.tail(list.from(arguments));

      var splits = namespace.split(".");
      var hasSeparator = splits.length > 1;
      var moduleName = hasSeparator && list.head(splits);
      var methodName = hasSeparator ? list.last(splits) : list.head(splits);

      var module = this.modules[moduleName || "editor"];
      if (!moduleName && this[methodName]) {
        return this[methodName].apply(this, args);
      } else if (module && module[methodName] && module.shouldInitialize()) {
        return module[methodName].apply(module, args);
      }
    };

    return this.initialize();
  };

  $.fn.extend({
    /**
     * Summernote API
     *
     * @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);

      // Update options
      options.langInfo = $.extend(
        true,
        {},
        $.summernote.lang["en-US"],
        $.summernote.lang[options.lang]
      );
      options.icons = $.extend(
        true,
        {},
        $.summernote.options.icons,
        options.icons
      );
      options.tooltip =
        options.tooltip === "auto" ? !agent.isSupportTouch : options.tooltip;

      this.each(function (idx, note) {
        var $note = $(note);
        if (!$note.data("summernote")) {
          var context = new Context($note, options);
          $note.data("summernote", context);
          $note.data("summernote").triggerEvent("init", context.layoutInfo);
        }
      });

      var $note = this.first();
      if ($note.length) {
        var context = $note.data("summernote");
        if (isExternalAPICalled) {
          return context.invoke.apply(context, list.from(arguments));
        } else if (options.focus) {
          context.invoke("editor.focus");
        }
      }

      return this;
    },
  });

  var Renderer = function (markup, children, options, callback) {
    this.render = function ($parent) {
      var $node = $(markup);

      if (options && options.contents) {
        $node.html(options.contents);
      }

      if (options && options.className) {
        $node.addClass(options.className);
      }

      if (options && options.data) {
        $.each(options.data, function (k, v) {
          $node.attr("data-" + k, v);
        });
      }

      if (options && options.click) {
        $node.on("click", options.click);
      }

      if (children) {
        var $container = $node.find(".note-children-container");
        children.forEach(function (child) {
          child.render($container.length ? $container : $node);
        });
      }

      if (callback) {
        callback($node, options);
      }

      if (options && options.callback) {
        options.callback($node);
      }

      if ($parent) {
        $parent.append($node);
      }

      return $node;
    };
  };

  var renderer = {
    create: function (markup, callback) {
      return function () {
        var children = $.isArray(arguments[0]) ? arguments[0] : [];
        var options =
          typeof arguments[1] === "object" ? arguments[1] : arguments[0];
        if (options && options.children) {
          children = options.children;
        }
        return new Renderer(markup, children, options, callback);
      };
    },
  };

  var editor = renderer.create(
    '<div class="note-editor note-frame panel panel-default"/>'
  );
  var toolbar = renderer.create('<div class="note-toolbar panel-heading"/>');
  var editingArea = renderer.create('<div class="note-editing-area"/>');
  var codable = renderer.create('<textarea class="note-codable"/>');
  var editable = renderer.create(
    '<div class="note-editable panel-body" contentEditable="true"/>'
  );
  var statusbar = renderer.create(
    [
      '<div class="note-statusbar">',
      '  <div class="note-resizebar">',
      '    <div class="note-icon-bar"/>',
      '    <div class="note-icon-bar"/>',
      '    <div class="note-icon-bar"/>',
      "  </div>",
      "</div>",
    ].join("")
  );

  var airEditor = renderer.create('<div class="note-editor"/>');
  var airEditable = renderer.create(
    '<div class="note-editable" contentEditable="true"/>'
  );

  var buttonGroup = renderer.create('<div class="note-btn-group btn-group">');

  var dropdown = renderer.create('<div class="dropdown-menu">', function (
    $node,
    options
  ) {
    var markup = $.isArray(options.items)
      ? options.items
          .map(function (item) {
            var value = typeof item === "string" ? item : item.value || "";
            var content = options.template ? options.template(item) : item;
            var option = typeof item === "object" ? item.option : undefined;

            var dataValue = 'data-value="' + value + '"';
            var dataOption =
              option !== undefined ? ' data-option="' + option + '"' : "";
            return (
              '<li><a href="#" ' +
              (dataValue + dataOption) +
              ">" +
              content +
              "</a></li>"
            );
          })
          .join("")
      : options.items;

    $node.html(markup);
  });

  var 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,
    dropdown: dropdown,
    dropdownCheck: dropdownCheck,
    palette: palette,
    dialog: dialog,
    popover: popover,
    icon: icon,
    options: {},

    button: function ($node, options) {
      return renderer.create(
        '<button type="button" class="note-btn btn btn-default btn-sm" tabindex="-1">',
        function ($node, options) {
          if (options && options.tooltip && self.options.tooltip) {
            $node
              .attr({
                title: options.tooltip,
              })
              .tooltip({
                container: "body",
                trigger: "hover",
                placement: "bottom",
              });
          }
        }
      )($node, options);
    },

    toggleBtn: function ($btn, isEnable) {
      $btn.toggleClass("disabled", !isEnable);
      $btn.attr("disabled", !isEnable);
    },

    toggleBtnActive: function ($btn, isActive) {
      $btn.toggleClass("active", isActive);
    },

    onDialogShown: function ($dialog, handler) {
      $dialog.one("shown.bs.modal", handler);
    },

    onDialogHidden: function ($dialog, handler) {
      $dialog.one("hidden.bs.modal", handler);
    },

    showDialog: function ($dialog) {
      $dialog.modal("show");
    },

    hideDialog: function ($dialog) {
      $dialog.modal("hide");
    },

    createLayout: function ($note, options) {
      self.options = options;
      var $editor = (options.airMode
        ? ui.airEditor([ui.editingArea([ui.airEditable()])])
        : ui.editor([
            ui.toolbar(),
            ui.editingArea([ui.codable(), ui.editable()]),
            ui.statusbar(),
          ])
      ).render();

      $editor.insertAfter($note);

      return {
        note: $note,
        editor: $editor,
        toolbar: $editor.find(".note-toolbar"),
        editingArea: $editor.find(".note-editing-area"),
        editable: $editor.find(".note-editable"),
        codable: $editor.find(".note-codable"),
        statusbar: $editor.find(".note-statusbar"),
      };
    },

    removeLayout: function ($note, layoutInfo) {
      $note.html(layoutInfo.editable.html());
      layoutInfo.editor.remove();
      $note.show();
    },
  };

  $.summernote = $.summernote || {
    lang: {},
  };

  $.extend($.summernote.lang, {
    "en-US": {
      font: {
        bold: "Bold",
        italic: "Italic",
        underline: "Underline",
        clear: "Remove Font Style",
        height: "Line Height",
        name: "Font Family",
        strikethrough: "Strikethrough",
        subscript: "Subscript",
        superscript: "Superscript",
        size: "Font Size",
      },
      image: {
        image: "Picture",
        insert: "Insert Image",
        resizeFull: "Resize Full",
        resizeHalf: "Resize Half",
        resizeQuarter: "Resize Quarter",
        floatLeft: "Float Left",
        floatRight: "Float Right",
        floatNone: "Float None",
        shapeRounded: "Shape: Rounded",
        shapeCircle: "Shape: Circle",
        shapeThumbnail: "Shape: Thumbnail",
        shapeNone: "Shape: None",
        dragImageHere: "Drag image or text here",
        dropImage: "Drop image or Text",
        selectFromFiles: "Select from files",
        maximumFileSize: "Maximum file size",
        maximumFileSizeError: "Maximum file size exceeded.",
        url: "Image URL",
        remove: "Remove Image",
      },
      video: {
        video: "Video",
        videoLink: "Video Link",
        insert: "Insert Video",
        url: "Video URL?",
        providers: "(YouTube, Vimeo, Vine, Instagram, DailyMotion or Youku)",
      },
      link: {
        link: "Link",
        insert: "Insert Link",
        unlink: "Unlink",
        edit: "Edit",
        textToDisplay: "Text to display",
        url: "To what URL should this link go?",
        openInNewWindow: "Open in new window",
      },
      table: {
        table: "Table",
        addRowAbove: "Add row above",
        addRowBelow: "Add row below",
        addColLeft: "Add column left",
        addColRight: "Add column right",
        delRow: "Delete row",
        delCol: "Delete column",
        delTable: "Delete table",
      },
      hr: {
        insert: "Insert Horizontal Rule",
      },
      style: {
        style: "Style",
        p: "Normal",
        blockquote: "Quote",
        pre: "Code",
        h1: "Header 1",
        h2: "Header 2",
        h3: "Header 3",
        h4: "Header 4",
        h5: "Header 5",
        h6: "Header 6",
      },
      lists: {
        unordered: "Unordered list",
        ordered: "Ordered list",
      },
      options: {
        help: "Help",
        fullscreen: "Full Screen",
        codeview: "Code View",
      },
      paragraph: {
        paragraph: "Paragraph",
        outdent: "Outdent",
        indent: "Indent",
        left: "Align left",
        center: "Align center",
        right: "Align right",
        justify: "Justify full",
      },
      color: {
        recent: "Recent Color",
        more: "More Color",
        background: "Background Color",
        foreground: "Foreground Color",
        transparent: "Transparent",
        setTransparent: "Set transparent",
        reset: "Reset",
        resetToDefault: "Reset to default",
      },
      shortcut: {
        shortcuts: "Keyboard shortcuts",
        close: "Close",
        textFormatting: "Text formatting",
        action: "Action",
        paragraphFormatting: "Paragraph formatting",
        documentStyle: "Document Style",
        extraKeys: "Extra keys",
      },
      help: {
        insertParagraph: "Insert Paragraph",
        undo: "Undoes the last command",
        redo: "Redoes the last command",
        tab: "Tab",
        untab: "Untab",
        bold: "Set a bold style",
        italic: "Set a italic style",
        underline: "Set a underline style",
        strikethrough: "Set a strikethrough style",
        removeFormat: "Clean a style",
        justifyLeft: "Set left align",
        justifyCenter: "Set center align",
        justifyRight: "Set right align",
        justifyFull: "Set full align",
        insertUnorderedList: "Toggle unordered list",
        insertOrderedList: "Toggle ordered list",
        outdent: "Outdent on current paragraph",
        indent: "Indent on current paragraph",
        formatPara: "Change current block's format as a paragraph(P tag)",
        formatH1: "Change current block's format as H1",
        formatH2: "Change current block's format as H2",
        formatH3: "Change current block's format as H3",
        formatH4: "Change current block's format as H4",
        formatH5: "Change current block's format as H5",
        formatH6: "Change current block's format as H6",
        insertHorizontalRule: "Insert horizontal rule",
        "linkDialog.show": "Show Link Dialog",
      },
      history: {
        undo: "Undo",
        redo: "Redo",
      },
      specialChar: {
        specialChar: "SPECIAL CHARACTERS",
        select: "Select Special characters",
      },
    },
  });

  /**
   * @class core.key
   *
   * Object for keycodes.
   *
   * @singleton
   * @alternateClassName key
   */
  var key = (function () {
    var keyMap = {
      BACKSPACE: 8,
      TAB: 9,
      ENTER: 13,
      SPACE: 32,

      // 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);
      // isOnCell: judge whether range is on cell node or not
      this.isOnCell = makeIsOn(dom.isCell);
      // isOnData: judge whether range is on data node or not
      this.isOnData = makeIsOn(dom.isData);

      /**
       * @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",
          "font-family":
            document.queryCommandValue("fontname") || styleInfo["font-family"],
        });
      } catch (e) {}

      // list-style-type to list-style(unordered, ordered)
      if (!rng.isOnList()) {
        styleInfo["list-style"] = "none";
      } else {
        var orderedTypes = ["circle", "disc", "disc-leading-zero", "square"];
        var isUnordered =
          $.inArray(styleInfo["list-style-type"], orderedTypes) > -1;
        styleInfo["list-style"] = isUnordered ? "unordered" : "ordered";
      }

      var para = dom.ancestor(rng.sc, dom.isPara);
      if (para && para.style["line-height"]) {
        styleInfo["line-height"] = para.style.lineHeight;
      } else {
        var lineHeight =
          parseInt(styleInfo["line-height"], 10) /
          parseInt(styleInfo["font-size"], 10);
        styleInfo["line-height"] = lineHeight.toFixed(1);
      }

      styleInfo.anchor = rng.isOnAnchor() && dom.ancestor(rng.sc, dom.isAnchor);
      styleInfo.ancestors = dom.listAncestor(rng.sc, dom.isEditable);
      styleInfo.range = rng;

      return styleInfo;
    };
  };

  /**
   * @class editing.Bullet
   *
   * @alternateClassName Bullet
   */
  var Bullet = function () {
    var self = this;

    /**
     * toggle ordered list
     */
    this.insertOrderedList = function (editable) {
      this.toggleList("OL", editable);
    };

    /**
     * toggle unordered list
     */
    this.insertUnorderedList = function (editable) {
      this.toggleList("UL", editable);
    };

    /**
     * indent
     */
    this.indent = function (editable) {
      var self = this;
      var rng = range.create(editable).wrapBodyInlineWithPara();

      var paras = rng.nodes(dom.isPara, { includeAncestor: true });
      var clustereds = list.clusterBy(paras, func.peq2("parentNode"));

      $.each(clustereds, function (idx, paras) {
        var head = list.head(paras);
        if (dom.isLi(head)) {
          self.wrapList(paras, head.parentNode.nodeName);
        } else {
          $.each(paras, function (idx, para) {
            $(para).css("marginLeft", function (idx, val) {
              return (parseInt(val, 10) || 0) + 25;
            });
          });
        }
      });

      rng.select();
    };

    /**
     * outdent
     */
    this.outdent = function (editable) {
      var self = this;
      var rng = range.create(editable).wrapBodyInlineWithPara();

      var paras = rng.nodes(dom.isPara, { includeAncestor: true });
      var clustereds = list.clusterBy(paras, func.peq2("parentNode"));

      $.each(clustereds, function (idx, paras) {
        var head = list.head(paras);
        if (dom.isLi(head)) {
          self.releaseList([paras]);
        } else {
          $.each(paras, function (idx, para) {
            $(para).css("marginLeft", function (idx, val) {
              val = parseInt(val, 10) || 0;
              return val > 25 ? val - 25 : "";
            });
          });
        }
      });

      rng.select();
    };

    /**
     * toggle list
     *
     * @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, pre or custom-made styleTag with P tag
          if (
            (dom.isHeading(nextPara) ||
              dom.isPre(nextPara) ||
              dom.isCustomStyleTag(nextPara)) &&
            dom.isEmpty(nextPara)
          ) {
            nextPara = dom.replace(nextPara, "p");
          }
        }
        // no paragraph: insert empty paragraph
      } else {
        var next = rng.sc.childNodes[rng.so];
        nextPara = $(dom.emptyPara)[0];
        if (next) {
          rng.sc.insertBefore(nextPara, next);
        } else {
          rng.sc.appendChild(nextPara);
        }
      }

      range.create(nextPara, 0).normalize().select().scrollIntoView(editable);
    };
  };

  /**
   * @class Create a virtual table to create what actions to do in change.
   * @param {object} startPoint Cell selected to apply change.
   * @param {enum} where  Where change will be applied Row or Col. Use enum: TableResultAction.where
   * @param {enum} action Action to be applied. Use enum: TableResultAction.requestAction
   * @param {object} domTable Dom element of table to make changes.
   */
  var TableResultAction = function (startPoint, where, action, domTable) {
    var _startPoint = { colPos: 0, rowPos: 0 };
    var _virtualTable = [];
    var _actionCellList = [];

    //////////////////////////////////////////////
    // Private functions
    //////////////////////////////////////////////

    /**
     * Set the startPoint of action.
     */
    function setStartPoint() {
      if (
        !startPoint ||
        !startPoint.tagName ||
        (startPoint.tagName.toLowerCase() !== "td" &&
          startPoint.tagName.toLowerCase() !== "th")
      ) {
        console.error("Impossible to identify start Cell point.", startPoint);
        return;
      }
      _startPoint.colPos = startPoint.cellIndex;
      if (
        !startPoint.parentElement ||
        !startPoint.parentElement.tagName ||
        startPoint.parentElement.tagName.toLowerCase() !== "tr"
      ) {
        console.error("Impossible to identify start Row point.", startPoint);
        return;
      }
      _startPoint.rowPos = startPoint.parentElement.rowIndex;
    }

    /**
     * Define virtual table position info object.
     *
     * @param {int} rowIndex Index position in line of virtual table.
     * @param {int} cellIndex Index position in column of virtual table.
     * @param {object} baseRow Row affected by this position.
     * @param {object} baseCell Cell affected by this position.
     * @param {bool} isSpan Inform if it is an span cell/row.
     */
    function setVirtualTablePosition(
      rowIndex,
      cellIndex,
      baseRow,
      baseCell,
      isRowSpan,
      isColSpan,
      isVirtualCell
    ) {
      var objPosition = {
        baseRow: baseRow,
        baseCell: baseCell,
        isRowSpan: isRowSpan,
        isColSpan: isColSpan,
        isVirtual: isVirtualCell,
      };
      if (!_virtualTable[rowIndex]) {
        _virtualTable[rowIndex] = [];
      }
      _virtualTable[rowIndex][cellIndex] = objPosition;
    }

    /**
     * Create action cell object.
     *
     * @param {object} virtualTableCellObj Object of specific position on virtual table.
     * @param {enum} resultAction Action to be applied in that item.
     */
    function getActionCell(
      virtualTableCellObj,
      resultAction,
      virtualRowPosition,
      virtualColPosition
    ) {
      return {
        baseCell: virtualTableCellObj.baseCell,
        action: resultAction,
        virtualTable: {
          rowIndex: virtualRowPosition,
          cellIndex: virtualColPosition,
        },
      };
    }

    /**
     * Recover free index of row to append Cell.
     *
     * @param {int} rowIndex Index of row to find free space.
     * @param {int} cellIndex Index of cell to find free space in table.
     */
    function recoverCellIndex(rowIndex, cellIndex) {
      if (!_virtualTable[rowIndex]) {
        return cellIndex;
      }
      if (!_virtualTable[rowIndex][cellIndex]) {
        return cellIndex;
      }

      var newCellIndex = cellIndex;
      while (_virtualTable[rowIndex][newCellIndex]) {
        newCellIndex++;
        if (!_virtualTable[rowIndex][newCellIndex]) {
          return newCellIndex;
        }
      }
    }

    /**
     * Recover info about row and cell and add information to virtual table.
     *
     * @param {object} row Row to recover information.
     * @param {object} cell Cell to recover information.
     */
    function addCellInfoToVirtual(row, cell) {
      var cellIndex = recoverCellIndex(row.rowIndex, cell.cellIndex);
      var cellHasColspan = cell.colSpan > 1;
      var cellHasRowspan = cell.rowSpan > 1;
      var isThisSelectedCell =
        row.rowIndex === _startPoint.rowPos &&
        cell.cellIndex === _startPoint.colPos;
      setVirtualTablePosition(
        row.rowIndex,
        cellIndex,
        row,
        cell,
        cellHasRowspan,
        cellHasColspan,
        false
      );

      // Add span rows to virtual Table.
      var rowspanNumber = cell.attributes.rowSpan
        ? parseInt(cell.attributes.rowSpan.value, 10)
        : 0;
      if (rowspanNumber > 1) {
        for (var rp = 1; rp < rowspanNumber; rp++) {
          var rowspanIndex = row.rowIndex + rp;
          adjustStartPoint(rowspanIndex, cellIndex, cell, isThisSelectedCell);
          setVirtualTablePosition(
            rowspanIndex,
            cellIndex,
            row,
            cell,
            true,
            cellHasColspan,
            true
          );
        }
      }

      // Add span cols to virtual table.
      var colspanNumber = cell.attributes.colSpan
        ? parseInt(cell.attributes.colSpan.value, 10)
        : 0;
      if (colspanNumber > 1) {
        for (var cp = 1; cp < colspanNumber; cp++) {
          var cellspanIndex = recoverCellIndex(row.rowIndex, cellIndex + cp);
          adjustStartPoint(
            row.rowIndex,
            cellspanIndex,
            cell,
            isThisSelectedCell
          );
          setVirtualTablePosition(
            row.rowIndex,
            cellspanIndex,
            row,
            cell,
            cellHasRowspan,
            true,
            true
          );
        }
      }
    }

    /**
     * Process validation and adjust of start point if needed
     *
     * @param {int} rowIndex
     * @param {int} cellIndex
     * @param {object} cell
     * @param {bool} isSelectedCell
     */
    function adjustStartPoint(rowIndex, cellIndex, cell, isSelectedCell) {
      if (
        rowIndex === _startPoint.rowPos &&
        _startPoint.colPos >= cell.cellIndex &&
        cell.cellIndex <= cellIndex &&
        !isSelectedCell
      ) {
        _startPoint.colPos++;
      }
    }

    /**
     * Create virtual table of cells with all cells, including span cells.
     */
    function createVirtualTable() {
      var rows = domTable.rows;
      for (var rowIndex = 0; rowIndex < rows.length; rowIndex++) {
        var cells = rows[rowIndex].cells;
        for (var cellIndex = 0; cellIndex < cells.length; cellIndex++) {
          addCellInfoToVirtual(rows[rowIndex], cells[cellIndex]);
        }
      }
    }

    /**
     * Get action to be applied on the cell.
     *
     * @param {object} cell virtual table cell to apply action
     */
    function getDeleteResultActionToCell(cell) {
      switch (where) {
        case TableResultAction.where.Column:
          if (cell.isColSpan) {
            return TableResultAction.resultAction.SubtractSpanCount;
          }
          break;
        case TableResultAction.where.Row:
          if (!cell.isVirtual && cell.isRowSpan) {
            return TableResultAction.resultAction.AddCell;
          } else if (cell.isRowSpan) {
            return TableResultAction.resultAction.SubtractSpanCount;
          }
          break;
      }
      return TableResultAction.resultAction.RemoveCell;
    }

    /**
     * Get action to be applied on the cell.
     *
     * @param {object} cell virtual table cell to apply action
     */
    function getAddResultActionToCell(cell) {
      switch (where) {
        case TableResultAction.where.Column:
          if (cell.isColSpan) {
            return TableResultAction.resultAction.SumSpanCount;
          } else if (cell.isRowSpan && cell.isVirtual) {
            return TableResultAction.resultAction.Ignore;
          }
          break;
        case TableResultAction.where.Row:
          if (cell.isRowSpan) {
            return TableResultAction.resultAction.SumSpanCount;
          } else if (cell.isColSpan && cell.isVirtual) {
            return TableResultAction.resultAction.Ignore;
          }
          break;
      }
      return TableResultAction.resultAction.AddCell;
    }

    function init() {
      setStartPoint();
      createVirtualTable();
    }

    //////////////////////////////////////////////
    // Public functions
    //////////////////////////////////////////////

    /**
     * Recover array os what to do in table.
     */
    this.getActionList = function () {
      var fixedRow =
        where === TableResultAction.where.Row ? _startPoint.rowPos : -1;
      var fixedCol =
        where === TableResultAction.where.Column ? _startPoint.colPos : -1;

      var actualPosition = 0;
      var canContinue = true;
      while (canContinue) {
        var rowPosition = fixedRow >= 0 ? fixedRow : actualPosition;
        var colPosition = fixedCol >= 0 ? fixedCol : actualPosition;
        var row = _virtualTable[rowPosition];
        if (!row) {
          canContinue = false;
          return _actionCellList;
        }
        var cell = row[colPosition];
        if (!cell) {
          canContinue = false;
          return _actionCellList;
        }

        // Define action to be applied in this cell
        var resultAction = TableResultAction.resultAction.Ignore;
        switch (action) {
          case TableResultAction.requestAction.Add:
            resultAction = getAddResultActionToCell(cell);
            break;
          case TableResultAction.requestAction.Delete:
            resultAction = getDeleteResultActionToCell(cell);
            break;
        }
        _actionCellList.push(
          getActionCell(cell, resultAction, rowPosition, colPosition)
        );
        actualPosition++;
      }

      return _actionCellList;
    };

    init();
  };
  /**
   *
   * Where action occours enum.
   */
  TableResultAction.where = { Row: 0, Column: 1 };
  /**
   *
   * Requested action to apply enum.
   */
  TableResultAction.requestAction = { Add: 0, Delete: 1 };
  /**
   *
   * Result action to be executed enum.
   */
  TableResultAction.resultAction = {
    Ignore: 0,
    SubtractSpanCount: 1,
    RemoveCell: 2,
    AddCell: 3,
    SumSpanCount: 4,
  };

  /**
   *
   * @class editing.Table
   *
   * Table
   *
   */
  var Table = function () {
    /**
     * handle tab key
     *
     * @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();
      }
    };

    /**
     * Add a new row
     *
     * @param {WrappedRange} rng
     * @param {String} position (top/bottom)
     * @return {Node}
     */
    this.addRow = function (rng, position) {
      var cell = dom.ancestor(rng.commonAncestor(), dom.isCell);

      var currentTr = $(cell).closest("tr");
      var trAttributes = this.recoverAttributes(currentTr);
      var html = $("<tr" + trAttributes + "></tr>");

      var vTable = new TableResultAction(
        cell,
        TableResultAction.where.Row,
        TableResultAction.requestAction.Add,
        $(currentTr).closest("table")[0]
      );
      var actions = vTable.getActionList();

      for (var idCell = 0; idCell < actions.length; idCell++) {
        var currentCell = actions[idCell];
        var tdAttributes = this.recoverAttributes(currentCell.baseCell);
        switch (currentCell.action) {
          case TableResultAction.resultAction.AddCell:
            html.append("<td" + tdAttributes + ">" + dom.blank + "</td>");
            break;
          case TableResultAction.resultAction.SumSpanCount:
            if (position === "top") {
              var baseCellTr = currentCell.baseCell.parent;
              var isTopFromRowSpan =
                (!baseCellTr
                  ? 0
                  : currentCell.baseCell.closest("tr").rowIndex) <=
                currentTr[0].rowIndex;
              if (isTopFromRowSpan) {
                var newTd = $("<div></div>")
                  .append(
                    $(
                      "<td" + tdAttributes + ">" + dom.blank + "</td>"
                    ).removeAttr("rowspan")
                  )
                  .html();
                html.append(newTd);
                break;
              }
            }
            var rowspanNumber = parseInt(currentCell.baseCell.rowSpan, 10);
            rowspanNumber++;
            currentCell.baseCell.setAttribute("rowSpan", rowspanNumber);
            break;
        }
      }

      if (position === "top") {
        currentTr.before(html);
      } else {
        var cellHasRowspan = cell.rowSpan > 1;
        if (cellHasRowspan) {
          var lastTrIndex = currentTr[0].rowIndex + (cell.rowSpan - 2);
          $($(currentTr).parent().find("tr")[lastTrIndex]).after($(html));
          return;
        }
        currentTr.after(html);
      }
    };

    /**
     * Add a new col
     *
     * @param {WrappedRange} rng
     * @param {String} position (left/right)
     * @return {Node}
     */
    this.addCol = function (rng, position) {
      var cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
      var row = $(cell).closest("tr");
      var rowsGroup = $(row).siblings();
      rowsGroup.push(row);

      var vTable = new TableResultAction(
        cell,
        TableResultAction.where.Column,
        TableResultAction.requestAction.Add,
        $(row).closest("table")[0]
      );
      var actions = vTable.getActionList();

      for (var actionIndex = 0; actionIndex < actions.length; actionIndex++) {
        var currentCell = actions[actionIndex];
        var tdAttributes = this.recoverAttributes(currentCell.baseCell);
        switch (currentCell.action) {
          case TableResultAction.resultAction.AddCell:
            if (position === "right") {
              $(currentCell.baseCell).after(
                "<td" + tdAttributes + ">" + dom.blank + "</td>"
              );
            } else {
              $(currentCell.baseCell).before(
                "<td" + tdAttributes + ">" + dom.blank + "</td>"
              );
            }
            break;
          case TableResultAction.resultAction.SumSpanCount:
            if (position === "right") {
              var colspanNumber = parseInt(currentCell.baseCell.colSpan, 10);
              colspanNumber++;
              currentCell.baseCell.setAttribute("colSpan", colspanNumber);
            } else {
              $(currentCell.baseCell).before(
                "<td" + tdAttributes + ">" + dom.blank + "</td>"
              );
            }
            break;
        }
      }
    };

    /*
     * Copy attributes from element.
     *
     * @param {object} Element to recover attributes.
     * @return {string} Copied string elements.
     */
    this.recoverAttributes = function (el) {
      var resultStr = "";

      if (!el) {
        return resultStr;
      }

      var attrList = el.attributes || [];

      for (var i = 0; i < attrList.length; i++) {
        if (attrList[i].name.toLowerCase() === "id") {
          continue;
        }

        if (attrList[i].specified) {
          resultStr += " " + attrList[i].name + "='" + attrList[i].value + "'";
        }
      }

      return resultStr;
    };

    /**
     * Delete current row
     *
     * @param {WrappedRange} rng
     * @return {Node}
     */
    this.deleteRow = function (rng) {
      var cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
      var row = $(cell).closest("tr");
      var cellPos = row.children("td, th").index($(cell));
      var rowPos = row[0].rowIndex;

      var vTable = new TableResultAction(
        cell,
        TableResultAction.where.Row,
        TableResultAction.requestAction.Delete,
        $(row).closest("table")[0]
      );
      var actions = vTable.getActionList();

      for (var actionIndex = 0; actionIndex < actions.length; actionIndex++) {
        if (!actions[actionIndex]) {
          continue;
        }

        var baseCell = actions[actionIndex].baseCell;
        var virtualPosition = actions[actionIndex].virtualTable;
        var hasRowspan = baseCell.rowSpan && baseCell.rowSpan > 1;
        var rowspanNumber = hasRowspan ? parseInt(baseCell.rowSpan, 10) : 0;
        switch (actions[actionIndex].action) {
          case TableResultAction.resultAction.Ignore:
            continue;
          case TableResultAction.resultAction.AddCell:
            var nextRow = row.next("tr")[0];
            if (!nextRow) {
              continue;
            }
            var cloneRow = row[0].cells[cellPos];
            if (hasRowspan) {
              if (rowspanNumber > 2) {
                rowspanNumber--;
                nextRow.insertBefore(cloneRow, nextRow.cells[cellPos]);
                nextRow.cells[cellPos].setAttribute("rowSpan", rowspanNumber);
                nextRow.cells[cellPos].innerHTML = "";
              } else if (rowspanNumber === 2) {
                nextRow.insertBefore(cloneRow, nextRow.cells[cellPos]);
                nextRow.cells[cellPos].removeAttribute("rowSpan");
                nextRow.cells[cellPos].innerHTML = "";
              }
            }
            continue;
          case TableResultAction.resultAction.SubtractSpanCount:
            if (hasRowspan) {
              if (rowspanNumber > 2) {
                rowspanNumber--;
                baseCell.setAttribute("rowSpan", rowspanNumber);
                if (
                  virtualPosition.rowIndex !== rowPos &&
                  baseCell.cellIndex === cellPos
                ) {
                  baseCell.innerHTML = "";
                }
              } else if (rowspanNumber === 2) {
                baseCell.removeAttribute("rowSpan");
                if (
                  virtualPosition.rowIndex !== rowPos &&
                  baseCell.cellIndex === cellPos
                ) {
                  baseCell.innerHTML = "";
                }
              }
            }
            continue;
          case TableResultAction.resultAction.RemoveCell:
            // Do not need remove cell because row will be deleted.
            continue;
        }
      }
      row.remove();
    };

    /**
     * Delete current col
     *
     * @param {WrappedRange} rng
     * @return {Node}
     */
    this.deleteCol = function (rng) {
      var cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
      var row = $(cell).closest("tr");
      var cellPos = row.children("td, th").index($(cell));

      var vTable = new TableResultAction(
        cell,
        TableResultAction.where.Column,
        TableResultAction.requestAction.Delete,
        $(row).closest("table")[0]
      );
      var actions = vTable.getActionList();

      for (var actionIndex = 0; actionIndex < actions.length; actionIndex++) {
        if (!actions[actionIndex]) {
          continue;
        }
        switch (actions[actionIndex].action) {
          case TableResultAction.resultAction.Ignore:
            continue;
          case TableResultAction.resultAction.SubtractSpanCount:
            var baseCell = actions[actionIndex].baseCell;
            var hasColspan = baseCell.colSpan && baseCell.colSpan > 1;
            if (hasColspan) {
              var colspanNumber = baseCell.colSpan
                ? parseInt(baseCell.colSpan, 10)
                : 0;
              if (colspanNumber > 2) {
                colspanNumber--;
                baseCell.setAttribute("colSpan", colspanNumber);
                if (baseCell.cellIndex === cellPos) {
                  baseCell.innerHTML = "";
                }
              } else if (colspanNumber === 2) {
                baseCell.removeAttribute("colSpan");
                if (baseCell.cellIndex === cellPos) {
                  baseCell.innerHTML = "";
                }
              }
            }
            continue;
          case TableResultAction.resultAction.RemoveCell:
            dom.remove(actions[actionIndex].baseCell, true);
            continue;
        }
      }
    };

    /**
     * create empty table element
     *
     * @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];
    };

    /**
     * Delete current table
     *
     * @param {WrappedRange} rng
     * @return {Node}
     */
    this.deleteTable = function (rng) {
      var cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
      $(cell).closest("table").remove();
    };
  };

  var KEY_BOGUS = "bogus";

  /**
   * @class Editor
   */
  var Editor = function (context) {
    var self = this;

    var $note = context.layoutInfo.note;
    var $editor = context.layoutInfo.editor;
    var $editable = context.layoutInfo.editable;
    var options = context.options;
    var lang = options.langInfo;

    var editable = $editable[0];
    var lastRange = null;

    var style = new Style();
    var table = new Table();
    var typing = new Typing();
    var bullet = new Bullet();
    var history = new History($editable);

    this.initialize = function () {
      // bind custom events
      $editable
        .on("keydown", function (event) {
          if (event.keyCode === key.code.ENTER) {
            context.triggerEvent("enter", event);
          }
          context.triggerEvent("keydown", event);

          if (!event.isDefaultPrevented()) {
            if (options.shortcuts) {
              self.handleKeyMap(event);
            } else {
              self.preventDefaultEditableShortCuts(event);
            }
          }
        })
        .on("keyup", function (event) {
          context.triggerEvent("keyup", event);
        })
        .on("focus", function (event) {
          context.triggerEvent("focus", event);
        })
        .on("blur", function (event) {
          context.triggerEvent("blur", event);
        })
        .on("mousedown", function (event) {
          context.triggerEvent("mousedown", event);
        })
        .on("mouseup", function (event) {
          context.triggerEvent("mouseup", event);
        })
        .on("scroll", function (event) {
          context.triggerEvent("scroll", event);
        })
        .on("paste", function (event) {
          context.triggerEvent("paste", event);
        });

      // init content before set event
      $editable.html(dom.html($note) || dom.emptyPara);

      // [workaround] IE doesn't have input events for contentEditable
      // - see: https://goo.gl/4bfIvA
      var changeEventName = agent.isMSIE
        ? "DOMCharacterDataModified DOMSubtreeModified DOMNodeInserted"
        : "input";
      $editable.on(
        changeEventName,
        func.debounce(function () {
          context.triggerEvent("change", $editable.html());
        }, 250)
      );

      $editor
        .on("focusin", function (event) {
          context.triggerEvent("focusin", event);
        })
        .on("focusout", function (event) {
          context.triggerEvent("focusout", event);
        });

      if (!options.airMode) {
        if (options.width) {
          $editor.outerWidth(options.width);
        }
        if (options.height) {
          $editable.outerHeight(options.height);
        }
        if (options.maxHeight) {
          $editable.css("max-height", options.maxHeight);
        }
        if (options.minHeight) {
          $editable.css("min-height", options.minHeight);
        }
      }

      history.recordUndo();
    };

    this.destroy = function () {
      $editable.off();
    };

    this.handleKeyMap = function (event) {
      var keyMap = options.keyMap[agent.isMac ? "mac" : "pc"];
      var keys = [];

      if (event.metaKey) {
        keys.push("CMD");
      }
      if (event.ctrlKey && !event.altKey) {
        keys.push("CTRL");
      }
      if (event.shiftKey) {
        keys.push("SHIFT");
      }

      var keyName = key.nameFromCode[event.keyCode];
      if (keyName) {
        keys.push(keyName);
      }

      var eventName = keyMap[keys.join("+")];
      if (eventName) {
        event.preventDefault();
        context.invoke(eventName);
      } else if (key.isEdit(event.keyCode)) {
        this.afterCommand();
      }
    };

    this.preventDefaultEditableShortCuts = function (event) {
      // B(Bold, 66) / I(Italic, 73) / U(Underline, 85)
      if (
        (event.ctrlKey || event.metaKey) &&
        list.contains([66, 73, 85], event.keyCode)
      ) {
        event.preventDefault();
      }
    };

    /**
     * create range
     * @return {WrappedRange}
     */
    this.createRange = function () {
      this.focus();
      return range.create(editable);
    };

    /**
     * saveRange
     *
     * save current range
     *
     * @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, $target) {
      var onApplyCustomStyle = context.options.callbacks.onApplyCustomStyle;
      if (onApplyCustomStyle) {
        onApplyCustomStyle.call(this, $target, context, this.onFormatBlock);
      } else {
        this.onFormatBlock(tagName);
      }
    });

    this.onFormatBlock = function (tagName) {
      // [workaround] for MSIE, IE need `<`
      tagName = agent.isMSIE ? "<" + tagName + ">" : tagName;
      document.execCommand("FormatBlock", false, tagName);
    };

    this.formatPara = function () {
      this.formatBlock("P");
    };
    context.memo("help.formatPara", lang.help.formatPara);

    /* jshint ignore:start */
    for (var idx = 1; idx <= 6; idx++) {
      this["formatH" + idx] = (function (idx) {
        return function () {
          this.formatBlock("H" + idx);
        };
      })(idx);
      context.memo("help.formatH" + idx, lang.help["formatH" + idx]);
    }
    /* jshint ignore:end */

    /**
     * fontSize
     *
     * @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;

      // handle spaced urls from input
      if (typeof linkUrl === "string") {
        linkUrl = linkUrl.trim();
      }

      if (options.onCreateLink) {
        linkUrl = options.onCreateLink(linkUrl);
      } else {
        // if url doesn't match an URL schema, set http:// as default
        linkUrl = /^[A-Za-z][A-Za-z0-9+-.]*\:[\/\/]?/.test(linkUrl)
          ? linkUrl
          : "http://" + linkUrl;
      }

      var anchors = [];
      if (isTextChanged) {
        rng = rng.deleteContents();
        var anchor = rng.insertNode($("<A>" + linkText + "</A>")[0]);
        anchors.push(anchor);
      } else {
        anchors = style.styleNodes(rng, {
          nodeName: "A",
          expandClosestSibling: true,
          onlyPartialContains: true,
        });
      }

      $.each(anchors, function (idx, anchor) {
        $(anchor).attr("href", linkUrl);
        if (isNewWindow) {
          $(anchor).attr("target", "_blank");
        } else {
          $(anchor).removeAttr("target");
        }
      });

      var startRange = range.createFromNodeBefore(list.head(anchors));
      var startPoint = startRange.getStartPoint();
      var endRange = range.createFromNodeAfter(list.last(anchors));
      var endPoint = endRange.getEndPoint();

      range
        .create(
          startPoint.node,
          startPoint.offset,
          endPoint.node,
          endPoint.offset
        )
        .select();
    });

    /**
     * returns link info
     *
     * @return {Object}
     * @return {WrappedRange} return.range
     * @return {String} return.text
     * @return {Boolean} [return.isNewWindow=true]
     * @return {String} [return.url=""]
     */
    this.getLinkInfo = function () {
      var rng = this.createRange().expand(dom.isAnchor);

      // Get the first anchor on range(for edit).
      var $anchor = $(list.head(rng.nodes(dom.isAnchor)));
      var linkInfo = {
        range: rng,
        text: rng.toString(),
        url: $anchor.length ? $anchor.attr("href") : "",
      };

      // Define isNewWindow when anchor exists.
      if ($anchor.length) {
        linkInfo.isNewWindow = $anchor.attr("target") === "_blank";
      }

      return linkInfo;
    };

    /**
     * setting color
     *
     * @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));
    });

    /**
     * @method addRow
     *
     *
     */
    this.addRow = function (position) {
      var rng = this.createRange($editable);
      if (rng.isCollapsed() && rng.isOnCell()) {
        beforeCommand();
        table.addRow(rng, position);
        afterCommand();
      }
    };

    /**
     * @method addCol
     *
     *
     */
    this.addCol = function (position) {
      var rng = this.createRange($editable);
      if (rng.isCollapsed() && rng.isOnCell()) {
        beforeCommand();
        table.addCol(rng, position);
        afterCommand();
      }
    };

    /**
     * @method deleteRow
     *
     *
     */
    this.deleteRow = function () {
      var rng = this.createRange($editable);
      if (rng.isCollapsed() && rng.isOnCell()) {
        beforeCommand();
        table.deleteRow(rng);
        afterCommand();
      }
    };

    /**
     * @method deleteCol
     *
     *
     */
    this.deleteCol = function () {
      var rng = this.createRange($editable);
      if (rng.isCollapsed() && rng.isOnCell()) {
        beforeCommand();
        table.deleteCol(rng);
        afterCommand();
      }
    };

    /**
     * @method deleteTable
     *
     *
     */
    this.deleteTable = function () {
      var rng = this.createRange($editable);
      if (rng.isCollapsed() && rng.isOnCell()) {
        beforeCommand();
        table.deleteTable(rng);
        afterCommand();
      }
    };

    /**
     * float me
     *
     * @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);
    };
  };

  var Clipboard = function (context) {
    var self = this;

    var $editable = context.layoutInfo.editable;

    this.events = {
      "summernote.keydown": function (we, e) {
        if (self.needKeydownHook()) {
          if ((e.ctrlKey || e.metaKey) && e.keyCode === key.code.V) {
            context.invoke("editor.saveRange");
            self.$paste.focus();

            setTimeout(function () {
              self.pasteByHook();
            }, 0);
          }
        }
      },
    };

    this.needKeydownHook = function () {
      return (agent.isMSIE && agent.browserVersion > 10) || agent.isFF;
    };

    this.initialize = function () {
      // [workaround] getting image from clipboard
      //  - IE11 and Firefox: CTRL+v hook
      //  - Webkit: event.clipboardData
      if (this.needKeydownHook()) {
        this.$paste = $('<div tabindex="-1" />')
          .attr("contenteditable", true)
          .css({
            position: "absolute",
            left: -100000,
            opacity: 0,
          });
        $editable.before(this.$paste);

        this.$paste.on("paste", function (event) {
          context.triggerEvent("paste", event);
        });
      } else {
        $editable.on("paste", this.pasteByEvent);
      }
    };

    this.destroy = function () {
      if (this.needKeydownHook()) {
        this.$paste.remove();
        this.$paste = null;
      }
    };

    this.pasteByHook = function () {
      var node = this.$paste[0].firstChild;

      var src = node && node.src;
      if (dom.isImg(node) && src.indexOf("data:") === 0) {
        var decodedData = atob(node.src.split(",")[1]);
        var array = new Uint8Array(decodedData.length);
        for (var i = 0; i < decodedData.length; i++) {
          array[i] = decodedData.charCodeAt(i);
        }

        var blob = new Blob([array], { type: "image/png" });
        blob.name = "clipboard.png";

        context.invoke("editor.restoreRange");
        context.invoke("editor.focus");
        context.invoke("editor.insertImagesOrCallback", [blob]);
      } else {
        var pasteContent = $("<div />").html(this.$paste.html()).html();
        context.invoke("editor.restoreRange");
        context.invoke("editor.focus");

        if (pasteContent) {
          context.invoke("editor.pasteHTML", pasteContent);
        }
      }

      this.$paste.empty();
    };

    /**
     * paste by clipboard event
     *
     * @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 documentEventHandlers = {};

    var $dropzone = $(
      [
        '<div class="note-dropzone">',
        '  <div class="note-dropzone-message"/>',
        "</div>",
      ].join("")
    ).prependTo($editor);

    var detachDocumentEvent = function () {
      Object.keys(documentEventHandlers).forEach(function (key) {
        $document.off(key.substr(2).toLowerCase(), documentEventHandlers[key]);
      });
      documentEventHandlers = {};
    };

    /**
     * attach Drag and Drop Events
     */
    this.initialize = function () {
      if (options.disableDragAndDrop) {
        // prevent default drop event
        documentEventHandlers.onDrop = function (e) {
          e.preventDefault();
        };
        $document.on("drop", documentEventHandlers.onDrop);
      } else {
        this.attachDragAndDropEvent();
      }
    };

    /**
     * attach Drag and Drop Events
     */
    this.attachDragAndDropEvent = function () {
      var collection = $(),
        $dropzoneMessage = $dropzone.find(".note-dropzone-message");

      documentEventHandlers.onDragenter = function (e) {
        var isCodeview = context.invoke("codeview.isActivated");
        var hasEditorSize = $editor.width() > 0 && $editor.height() > 0;
        if (!isCodeview && !collection.length && hasEditorSize) {
          $editor.addClass("dragover");
          $dropzone.width($editor.width());
          $dropzone.height($editor.height());
          $dropzoneMessage.text(lang.image.dragImageHere);
        }
        collection = collection.add(e.target);
      };

      documentEventHandlers.onDragleave = function (e) {
        collection = collection.not(e.target);
        if (!collection.length) {
          $editor.removeClass("dragover");
        }
      };

      documentEventHandlers.onDrop = function () {
        collection = $();
        $editor.removeClass("dragover");
      };

      // show dropzone on dragenter when dragging a object to document
      // -but only if the editor is visible, i.e. has a positive width and height
      $document
        .on("dragenter", documentEventHandlers.onDragenter)
        .on("dragleave", documentEventHandlers.onDragleave)
        .on("drop", documentEventHandlers.onDrop);

      // change dropzone's message on hover.
      $dropzone
        .on("dragenter", function () {
          $dropzone.addClass("hover");
          $dropzoneMessage.text(lang.image.dropImage);
        })
        .on("dragleave", function () {
          $dropzone.removeClass("hover");
          $dropzoneMessage.text(lang.image.dragImageHere);
        });

      // attach dropImage
      $dropzone
        .on("drop", function (event) {
          var dataTransfer = event.originalEvent.dataTransfer;

          if (dataTransfer && dataTransfer.files && dataTransfer.files.length) {
            event.preventDefault();
            $editable.focus();
            context.invoke("editor.insertImagesOrCallback", dataTransfer.files);
          } else {
            $.each(dataTransfer.types, function (idx, type) {
              var content = dataTransfer.getData(type);

              if (type.toLowerCase().indexOf("text") > -1) {
                context.invoke("editor.pasteHTML", content);
              } else {
                $(content).each(function () {
                  context.invoke("editor.insertNode", this);
                });
              }
            });
          }
        })
        .on("dragover", false); // prevent default dragover event
    };

    this.destroy = function () {
      detachDocumentEvent();
    };
  };

  var CodeMirror;
  if (agent.hasCodeMirror) {
    if (agent.isSupportAmd) {
      require(["codemirror"], function (cm) {
        CodeMirror = cm;
      });
    } else {
      CodeMirror = window.CodeMirror;
    }
  }

  /**
   * @class Codeview
   */
  var Codeview = function (context) {
    var $editor = context.layoutInfo.editor;
    var $editable = context.layoutInfo.editable;
    var $codable = context.layoutInfo.codable;
    var options = context.options;

    this.sync = function () {
      var isCodeview = this.isActivated();
      if (isCodeview && agent.hasCodeMirror) {
        $codable.data("cmEditor").save();
      }
    };

    /**
     * @return {Boolean}
     */
    this.isActivated = function () {
      return $editor.hasClass("codeview");
    };

    /**
     * toggle codeview
     */
    this.toggle = function () {
      if (this.isActivated()) {
        this.deactivate();
      } else {
        this.activate();
      }
      context.triggerEvent("codeview.toggled");
    };

    /**
     * activate code view
     */
    this.activate = function () {
      $codable.val(dom.html($editable, options.prettifyHtml));
      $codable.height($editable.height());

      context.invoke("toolbar.updateCodeview", true);
      $editor.addClass("codeview");
      $codable.focus();

      // activate CodeMirror as codable
      if (agent.hasCodeMirror) {
        var cmEditor = CodeMirror.fromTextArea($codable[0], options.codemirror);

        // CodeMirror TernServer
        if (options.codemirror.tern) {
          var server = new CodeMirror.TernServer(options.codemirror.tern);
          cmEditor.ternServer = server;
          cmEditor.on("cursorActivity", function (cm) {
            server.updateArgHints(cm);
          });
        }

        // CodeMirror hasn't Padding.
        cmEditor.setSize(null, $editable.outerHeight());
        $codable.data("cmEditor", cmEditor);
      }
    };

    /**
     * deactivate code view
     */
    this.deactivate = function () {
      // deactivate CodeMirror as codable
      if (agent.hasCodeMirror) {
        var cmEditor = $codable.data("cmEditor");
        $codable.val(cmEditor.getValue());
        cmEditor.toTextArea();
      }

      var value = dom.value($codable, options.prettifyHtml) || dom.emptyPara;
      var isChange = $editable.html() !== value;

      $editable.html(value);
      $editable.height(options.height ? $codable.height() : "auto");
      $editor.removeClass("codeview");

      if (isChange) {
        context.triggerEvent("change", $editable.html(), $editable);
      }

      $editable.focus();

      context.invoke("toolbar.updateCodeview", false);
    };

    this.destroy = function () {
      if (this.isActivated()) {
        this.deactivate();
      }
    };
  };

  var EDITABLE_PADDING = 24;

  var Statusbar = function (context) {
    var $document = $(document);
    var $statusbar = context.layoutInfo.statusbar;
    var $editable = context.layoutInfo.editable;
    var options = context.options;

    this.initialize = function () {
      if (options.airMode || options.disableResizeEditor) {
        this.destroy();
        return;
      }

      $statusbar.on("mousedown", function (event) {
        event.preventDefault();
        event.stopPropagation();

        var editableTop = $editable.offset().top - $document.scrollTop();
        var onMouseMove = function (event) {
          var height = event.clientY - (editableTop + EDITABLE_PADDING);

          height =
            options.minheight > 0
              ? Math.max(height, options.minheight)
              : height;
          height =
            options.maxHeight > 0
              ? Math.min(height, options.maxHeight)
              : height;

          $editable.height(height);
        };

        $document.on("mousemove", onMouseMove).one("mouseup", function () {
          $document.off("mousemove", onMouseMove);
        });
      });
    };

    this.destroy = function () {
      $statusbar.off();
      $statusbar.remove();
    };
  };

  var Fullscreen = function (context) {
    var self = this;
    var $editor = context.layoutInfo.editor;
    var $toolbar = context.layoutInfo.toolbar;
    var $editable = context.layoutInfo.editable;
    var $codable = context.layoutInfo.codable;

    var $window = $(window);
    var $scrollbar = $("html, body");

    this.resizeTo = function (size) {
      $editable.css("height", size.h);
      $codable.css("height", size.h);
      if ($codable.data("cmeditor")) {
        $codable.data("cmeditor").setsize(null, size.h);
      }
    };

    this.onResize = function () {
      self.resizeTo({
        h: $window.height() - $toolbar.outerHeight(),
      });
    };

    /**
     * toggle fullscreen
     */
    this.toggle = function () {
      $editor.toggleClass("fullscreen");
      if (this.isFullscreen()) {
        $editable.data("orgHeight", $editable.css("height"));
        $window.on("resize", this.onResize).trigger("resize");
        $scrollbar.css("overflow", "hidden");
      } else {
        $window.off("resize", this.onResize);
        this.resizeTo({ h: $editable.data("orgHeight") });
        $scrollbar.css("overflow", "visible");
      }

      context.invoke("toolbar.updateFullscreen", this.isFullscreen());
    };

    this.isFullscreen = function () {
      return $editor.hasClass("fullscreen");
    };
  };

  var Handle = function (context) {
    var self = this;

    var $document = $(document);
    var $editingArea = context.layoutInfo.editingArea;
    var options = context.options;

    this.events = {
      "summernote.mousedown": function (we, e) {
        if (self.update(e.target)) {
          e.preventDefault();
        }
      },
      "summernote.keyup summernote.scroll summernote.change summernote.dialog.shown": function () {
        self.update();
      },
      "summernote.disable": function () {
        self.hide();
      },
    };

    this.initialize = function () {
      this.$handle = $(
        [
          '<div class="note-handle">',
          '<div class="note-control-selection">',
          '<div class="note-control-selection-bg"></div>',
          '<div class="note-control-holder note-control-nw"></div>',
          '<div class="note-control-holder note-control-ne"></div>',
          '<div class="note-control-holder note-control-sw"></div>',
          '<div class="',
          options.disableResizeImage
            ? "note-control-holder"
            : "note-control-sizing",
          ' note-control-se"></div>',
          options.disableResizeImage
            ? ""
            : '<div class="note-control-selection-info"></div>',
          "</div>",
          "</div>",
        ].join("")
      ).prependTo($editingArea);

      this.$handle.on("mousedown", function (event) {
        if (dom.isControlSizing(event.target)) {
          event.preventDefault();
          event.stopPropagation();

          var $target = self.$handle
              .find(".note-control-selection")
              .data("target"),
            posStart = $target.offset(),
            scrollTop = $document.scrollTop();

          var onMouseMove = function (event) {
            context.invoke(
              "editor.resizeTo",
              {
                x: event.clientX - posStart.left,
                y: event.clientY - (posStart.top - scrollTop),
              },
              $target,
              !event.shiftKey
            );

            self.update($target[0]);
          };

          $document.on("mousemove", onMouseMove).one("mouseup", function (e) {
            e.preventDefault();
            $document.off("mousemove", onMouseMove);
            context.invoke("editor.afterCommand");
          });

          if (!$target.data("ratio")) {
            // original ratio.
            $target.data("ratio", $target.height() / $target.width());
          }
        }
      });
    };

    this.destroy = function () {
      this.$handle.remove();
    };

    this.update = function (target) {
      if (context.isDisabled()) {
        return false;
      }

      var isImage = dom.isImg(target);
      var $selection = this.$handle.find(".note-control-selection");

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

      if (isImage) {
        var $image = $(target);
        var 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 = /^([A-Za-z][A-Za-z0-9+-.]*\:[\/\/]?|mailto:[A-Z0-9._%+-]+@)?(www\.)?(.+)$/i;

    this.events = {
      "summernote.keyup": function (we, e) {
        if (!e.isDefaultPrevented()) {
          self.handleKeyup(e);
        }
      },
      "summernote.keydown": function (we, e) {
        self.handleKeydown(e);
      },
    };

    this.initialize = function () {
      this.lastWordRange = null;
    };

    this.destroy = function () {
      this.lastWordRange = null;
    };

    this.replace = function () {
      if (!this.lastWordRange) {
        return;
      }

      var keyword = this.lastWordRange.toString();
      var match = keyword.match(linkPattern);

      if (match && (match[1] || match[2])) {
        var link = match[1] ? keyword : defaultScheme + keyword;
        var node = $("<a />").html(keyword).attr("href", link)[0];

        this.lastWordRange.insertNode(node);
        this.lastWordRange = null;
        context.invoke("editor.focus");
      }
    };

    this.handleKeydown = function (e) {
      if (list.contains([key.code.ENTER, key.code.SPACE], e.keyCode)) {
        var wordRange = context.invoke("editor.createRange").getWordRange();
        this.lastWordRange = wordRange;
      }
    };

    this.handleKeyup = function (e) {
      if (list.contains([key.code.ENTER, key.code.SPACE], e.keyCode)) {
        this.replace();
      }
    };
  };

  /**
   * textarea auto sync.
   */
  var AutoSync = function (context) {
    var $note = context.layoutInfo.note;

    this.events = {
      "summernote.change": function () {
        $note.val(context.invoke("code"));
      },
    };

    this.shouldInitialize = function () {
      return dom.isTextarea($note[0]);
    };
  };

  var Placeholder = function (context) {
    var self = this;
    var $editingArea = context.layoutInfo.editingArea;
    var options = context.options;

    this.events = {
      "summernote.init summernote.change": function () {
        self.update();
      },
      "summernote.codeview.toggled": function () {
        self.update();
      },
    };

    this.shouldInitialize = function () {
      return !!options.placeholder;
    };

    this.initialize = function () {
      this.$placeholder = $('<div class="note-placeholder">');
      this.$placeholder
        .on("click", function () {
          context.invoke("focus");
        })
        .text(options.placeholder)
        .prependTo($editingArea);
    };

    this.destroy = function () {
      this.$placeholder.remove();
    };

    this.update = function () {
      var isShow =
        !context.invoke("codeview.isActivated") &&
        context.invoke("editor.isEmpty");
      this.$placeholder.toggle(isShow);
    };
  };

  var Buttons = function (context) {
    var self = this;
    var ui = $.summernote.ui;

    var $toolbar = context.layoutInfo.toolbar;
    var options = context.options;
    var lang = options.langInfo;

    var invertedKeyMap = func.invertObject(
      options.keyMap[agent.isMac ? "mac" : "pc"]
    );

    var representShortcut = (this.representShortcut = function (editorMethod) {
      var shortcut = invertedKeyMap[editorMethod];
      if (!options.shortcuts || !shortcut) {
        return "";
      }

      if (agent.isMac) {
        shortcut = shortcut.replace("CMD", "⌘").replace("SHIFT", "⇧");
      }

      shortcut = shortcut
        .replace("BACKSLASH", "\\")
        .replace("SLASH", "/")
        .replace("LEFTBRACKET", "[")
        .replace("RIGHTBRACKET", "]");

      return " (" + shortcut + ")";
    });

    this.initialize = function () {
      this.addToolbarButtons();
      this.addImagePopoverButtons();
      this.addLinkPopoverButtons();
      this.addTablePopoverButtons();
      this.fontInstalledMap = {};
    };

    this.destroy = function () {
      delete this.fontInstalledMap;
    };

    this.isFontInstalled = function (name) {
      if (!self.fontInstalledMap.hasOwnProperty(name)) {
        self.fontInstalledMap[name] =
          agent.isFontInstalled(name) ||
          list.contains(options.fontNamesIgnoreCheck, name);
      }

      return self.fontInstalledMap[name];
    };

    this.addToolbarButtons = function () {
      context.memo("button.style", function () {
        return ui
          .buttonGroup([
            ui.button({
              className: "dropdown-toggle",
              contents:
                ui.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: lang.style.hasOwnProperty(item)
                      ? lang.style[item]
                      : item,
                  };
                }

                var tag = item.tag;
                var title = item.title;
                var style = item.style ? ' style="' + item.style + '" ' : "";
                var className = item.className
                  ? ' class="' + item.className + '"'
                  : "";

                return (
                  "<" + tag + style + className + ">" + title + "</" + tag + ">"
                );
              },
              click: context.createInvokeHandler("editor.formatBlock"),
            }),
          ])
          .render();
      });

      context.memo("button.bold", function () {
        return ui
          .button({
            className: "note-btn-bold",
            contents: ui.icon(options.icons.bold),
            tooltip: lang.font.bold + representShortcut("bold"),
            click: context.createInvokeHandlerAndUpdateState("editor.bold"),
          })
          .render();
      });

      context.memo("button.italic", function () {
        return ui
          .button({
            className: "note-btn-italic",
            contents: ui.icon(options.icons.italic),
            tooltip: lang.font.italic + representShortcut("italic"),
            click: context.createInvokeHandlerAndUpdateState("editor.italic"),
          })
          .render();
      });

      context.memo("button.underline", function () {
        return ui
          .button({
            className: "note-btn-underline",
            contents: ui.icon(options.icons.underline),
            tooltip: lang.font.underline + representShortcut("underline"),
            click: context.createInvokeHandlerAndUpdateState(
              "editor.underline"
            ),
          })
          .render();
      });

      context.memo("button.clear", function () {
        return ui
          .button({
            contents: ui.icon(options.icons.eraser),
            tooltip: lang.font.clear + representShortcut("removeFormat"),
            click: context.createInvokeHandler("editor.removeFormat"),
          })
          .render();
      });

      context.memo("button.strikethrough", function () {
        return ui
          .button({
            className: "note-btn-strikethrough",
            contents: ui.icon(options.icons.strikethrough),
            tooltip:
              lang.font.strikethrough + representShortcut("strikethrough"),
            click: context.createInvokeHandlerAndUpdateState(
              "editor.strikethrough"
            ),
          })
          .render();
      });

      context.memo("button.superscript", function () {
        return ui
          .button({
            className: "note-btn-superscript",
            contents: ui.icon(options.icons.superscript),
            tooltip: lang.font.superscript,
            click: context.createInvokeHandlerAndUpdateState(
              "editor.superscript"
            ),
          })
          .render();
      });

      context.memo("button.subscript", function () {
        return ui
          .button({
            className: "note-btn-subscript",
            contents: ui.icon(options.icons.subscript),
            tooltip: lang.font.subscript,
            click: context.createInvokeHandlerAndUpdateState(
              "editor.subscript"
            ),
          })
          .render();
      });

      context.memo("button.fontname", function () {
        return ui
          .buttonGroup([
            ui.button({
              className: "dropdown-toggle",
              contents:
                '<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.createInvokeHandlerAndUpdateState(
                "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 + representShortcut("linkDialog.show"),
            click: context.createInvokeHandler("linkDialog.show"),
          })
          .render();
      });

      context.memo("button.picture", function () {
        return ui
          .button({
            contents: ui.icon(options.icons.picture),
            tooltip: lang.image.image,
            click: context.createInvokeHandler("imageDialog.show"),
          })
          .render();
      });

      context.memo("button.video", function () {
        return ui
          .button({
            contents: ui.icon(options.icons.video),
            tooltip: lang.video.video,
            click: context.createInvokeHandler("videoDialog.show"),
          })
          .render();
      });

      context.memo("button.hr", function () {
        return ui
          .button({
            contents: ui.icon(options.icons.minus),
            tooltip: lang.hr.insert + representShortcut("insertHorizontalRule"),
            click: context.createInvokeHandler("editor.insertHorizontalRule"),
          })
          .render();
      });

      context.memo("button.fullscreen", function () {
        return ui
          .button({
            className: "btn-fullscreen",
            contents: ui.icon(options.icons.arrowsAlt),
            tooltip: lang.options.fullscreen,
            click: context.createInvokeHandler("fullscreen.toggle"),
          })
          .render();
      });

      context.memo("button.codeview", function () {
        return ui
          .button({
            className: "btn-codeview",
            contents: ui.icon(options.icons.code),
            tooltip: lang.options.codeview,
            click: context.createInvokeHandler("codeview.toggle"),
          })
          .render();
      });

      context.memo("button.redo", function () {
        return ui
          .button({
            contents: ui.icon(options.icons.redo),
            tooltip: lang.history.redo + representShortcut("redo"),
            click: context.createInvokeHandler("editor.redo"),
          })
          .render();
      });

      context.memo("button.undo", function () {
        return ui
          .button({
            contents: ui.icon(options.icons.undo),
            tooltip: lang.history.undo + representShortcut("undo"),
            click: context.createInvokeHandler("editor.undo"),
          })
          .render();
      });

      context.memo("button.help", function () {
        return ui
          .button({
            contents: ui.icon(options.icons.question),
            tooltip: lang.options.help,
            click: context.createInvokeHandler("helpDialog.show"),
          })
          .render();
      });
    };

    /**
     * image : [
     *   ['imagesize', ['imageSize100', 'imageSize50', 'imageSize25']],
     *   ['float', ['floatLeft', 'floatRight', 'floatNone' ]],
     *   ['remove', ['removeMedia']]
     * ],
     */
    this.addImagePopoverButtons = function () {
      // Image Size Buttons
      context.memo("button.imageSize100", function () {
        return ui
          .button({
            contents: '<span class="note-fontsize-10">100%</span>',
            tooltip: lang.image.resizeFull,
            click: context.createInvokeHandler("editor.resize", "1"),
          })
          .render();
      });
      context.memo("button.imageSize50", function () {
        return ui
          .button({
            contents: '<span class="note-fontsize-10">50%</span>',
            tooltip: lang.image.resizeHalf,
            click: context.createInvokeHandler("editor.resize", "0.5"),
          })
          .render();
      });
      context.memo("button.imageSize25", function () {
        return ui
          .button({
            contents: '<span class="note-fontsize-10">25%</span>',
            tooltip: lang.image.resizeQuarter,
            click: context.createInvokeHandler("editor.resize", "0.25"),
          })
          .render();
      });

      // Float Buttons
      context.memo("button.floatLeft", function () {
        return ui
          .button({
            contents: ui.icon(options.icons.alignLeft),
            tooltip: lang.image.floatLeft,
            click: context.createInvokeHandler("editor.floatMe", "left"),
          })
          .render();
      });

      context.memo("button.floatRight", function () {
        return ui
          .button({
            contents: ui.icon(options.icons.alignRight),
            tooltip: lang.image.floatRight,
            click: context.createInvokeHandler("editor.floatMe", "right"),
          })
          .render();
      });

      context.memo("button.floatNone", function () {
        return ui
          .button({
            contents: ui.icon(options.icons.alignJustify),
            tooltip: lang.image.floatNone,
            click: context.createInvokeHandler("editor.floatMe", "none"),
          })
          .render();
      });

      // Remove Buttons
      context.memo("button.removeMedia", function () {
        return ui
          .button({
            contents: ui.icon(options.icons.trash),
            tooltip: lang.image.remove,
            click: context.createInvokeHandler("editor.removeMedia"),
          })
          .render();
      });
    };

    this.addLinkPopoverButtons = function () {
      context.memo("button.linkDialogShow", function () {
        return ui
          .button({
            contents: ui.icon(options.icons.link),
            tooltip: lang.link.edit,
            click: context.createInvokeHandler("linkDialog.show"),
          })
          .render();
      });

      context.memo("button.unlink", function () {
        return ui
          .button({
            contents: ui.icon(options.icons.unlink),
            tooltip: lang.link.unlink,
            click: context.createInvokeHandler("editor.unlink"),
          })
          .render();
      });
    };

    /**
     * table : [
     *  ['add', ['addRowDown', 'addRowUp', 'addColLeft', 'addColRight']],
     *  ['delete', ['deleteRow', 'deleteCol', 'deleteTable']]
     * ],
     */
    this.addTablePopoverButtons = function () {
      context.memo("button.addRowUp", function () {
        return ui
          .button({
            className: "btn-md",
            contents: ui.icon(options.icons.rowAbove),
            tooltip: lang.table.addRowAbove,
            click: context.createInvokeHandler("editor.addRow", "top"),
          })
          .render();
      });
      context.memo("button.addRowDown", function () {
        return ui
          .button({
            className: "btn-md",
            contents: ui.icon(options.icons.rowBelow),
            tooltip: lang.table.addRowBelow,
            click: context.createInvokeHandler("editor.addRow", "bottom"),
          })
          .render();
      });
      context.memo("button.addColLeft", function () {
        return ui
          .button({
            className: "btn-md",
            contents: ui.icon(options.icons.colBefore),
            tooltip: lang.table.addColLeft,
            click: context.createInvokeHandler("editor.addCol", "left"),
          })
          .render();
      });
      context.memo("button.addColRight", function () {
        return ui
          .button({
            className: "btn-md",
            contents: ui.icon(options.icons.colAfter),
            tooltip: lang.table.addColRight,
            click: context.createInvokeHandler("editor.addCol", "right"),
          })
          .render();
      });
      context.memo("button.deleteRow", function () {
        return ui
          .button({
            className: "btn-md",
            contents: ui.icon(options.icons.rowRemove),
            tooltip: lang.table.delRow,
            click: context.createInvokeHandler("editor.deleteRow"),
          })
          .render();
      });
      context.memo("button.deleteCol", function () {
        return ui
          .button({
            className: "btn-md",
            contents: ui.icon(options.icons.colRemove),
            tooltip: lang.table.delCol,
            click: context.createInvokeHandler("editor.deleteCol"),
          })
          .render();
      });
      context.memo("button.deleteTable", function () {
        return ui
          .button({
            className: "btn-md",
            contents: ui.icon(options.icons.trash),
            tooltip: lang.table.delTable,
            click: context.createInvokeHandler("editor.deleteTable"),
          })
          .render();
      });
    };

    this.build = function ($container, groups) {
      for (
        var groupIdx = 0, groupLen = groups.length;
        groupIdx < groupLen;
        groupIdx++
      ) {
        var group = groups[groupIdx];
        var groupName = group[0];
        var buttons = group[1];

        var $group = ui
          .buttonGroup({
            className: "note-" + groupName,
          })
          .render();

        for (var idx = 0, len = buttons.length; idx < len; idx++) {
          var button = context.memo("button." + buttons[idx]);
          if (button) {
            $group.append(
              typeof button === "function" ? button(context) : button
            );
          }
        }
        $group.appendTo($container);
      }
    };

    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 for="sn-checkbox-open-in-new-window">' +
            '<input type="checkbox" id="sn-checkbox-open-in-new-window" 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");
        }
      });
    };

    /**
     * toggle update button
     */
    this.toggleLinkBtn = function ($linkBtn, $linkText, $linkUrl) {
      ui.toggleBtn($linkBtn, $linkText.val() && $linkUrl.val());
    };

    /**
     * Show link dialog and set event handlers on dialog controls.
     *
     * @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");

          // if no url was given, copy text to url
          if (!linkInfo.url) {
            linkInfo.url = linkInfo.text;
          }

          $linkText.val(linkInfo.text);

          var handleLinkTextUpdate = function () {
            self.toggleLinkBtn($linkBtn, $linkText, $linkUrl);
            // if linktext was modified by keyup,
            // stop cloning text from linkUrl
            linkInfo.text = $linkText.val();
          };

          $linkText.on("input", handleLinkTextUpdate).on("paste", function () {
            setTimeout(handleLinkTextUpdate, 0);
          });

          var handleLinkUrlUpdate = function () {
            self.toggleLinkBtn($linkBtn, $linkText, $linkUrl);
            // display same link on `Text to display` input
            // when create a new link
            if (!linkInfo.text) {
              $linkText.val($linkUrl.val());
            }
          };

          $linkUrl
            .on("input", handleLinkUrlUpdate)
            .on("paste", function () {
              setTimeout(handleLinkUrlUpdate, 0);
            })
            .val(linkInfo.url)
            .trigger("focus");

          self.toggleLinkBtn($linkBtn, $linkText, $linkUrl);
          self.bindEnterKey($linkUrl, $linkBtn);
          self.bindEnterKey($linkText, $linkBtn);

          var isChecked =
            linkInfo.isNewWindow !== undefined
              ? linkInfo.isNewWindow
              : context.options.linkTargetBlank;

          $openInNewWindow.prop("checked", isChecked);

          $linkBtn.one("click", function (event) {
            event.preventDefault();

            deferred.resolve({
              range: linkInfo.range,
              url: $linkUrl.val(),
              text: $linkText.val(),
              isNewWindow: $openInNewWindow.is(":checked"),
            });
            self.$dialog.modal("hide");
          });
        });

        ui.onDialogHidden(self.$dialog, function () {
          // detach events
          $linkText.off("input paste keypress");
          $linkUrl.off("input paste keypress");
          $linkBtn.off("click");

          if (deferred.state() === "pending") {
            deferred.reject();
          }
        });

        ui.showDialog(self.$dialog);
      }).promise();
    };

    /**
     * @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.disable summernote.dialog.shown": function () {
        self.hide();
      },
    };

    this.shouldInitialize = function () {
      return !list.isEmpty(options.popover.link);
    };

    this.initialize = function () {
      this.$popover = ui
        .popover({
          className: "note-link-popover",
          callback: function ($node) {
            var $content = $node.find(".popover-content");
            $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 note-group-image-url" 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);
      });
    };
  };

  /**
   * Image popover module
   *  mouse events that show/hide popover will be handled by Handle.js.
   *  Handle.js will receive the events and invoke 'imagePopover.update'.
   */
  var ImagePopover = function (context) {
    var self = this;
    var ui = $.summernote.ui;

    var options = context.options;

    this.events = {
      "summernote.disable": function () {
        self.hide();
      },
    };

    this.shouldInitialize = function () {
      return !list.isEmpty(options.popover.image);
    };

    this.initialize = function () {
      this.$popover = ui
        .popover({
          className: "note-image-popover",
        })
        .render()
        .appendTo("body");
      var $content = this.$popover.find(".popover-content");

      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 TablePopover = function (context) {
    var self = this;
    var ui = $.summernote.ui;

    var options = context.options;

    this.events = {
      "summernote.mousedown": function (we, e) {
        self.update(e.target);
      },
      "summernote.keyup summernote.scroll summernote.change": function () {
        self.update();
      },
      "summernote.disable": function () {
        self.hide();
      },
    };

    this.shouldInitialize = function () {
      return !list.isEmpty(options.popover.table);
    };

    this.initialize = function () {
      this.$popover = ui
        .popover({
          className: "note-table-popover",
        })
        .render()
        .appendTo("body");
      var $content = this.$popover.find(".popover-content");

      context.invoke("buttons.build", $content, options.popover.table);

      // [workaround] Disable Firefox's default table editor
      if (agent.isFF) {
        document.execCommand("enableInlineTableEditing", false, false);
      }
    };

    this.destroy = function () {
      this.$popover.remove();
    };

    this.update = function (target) {
      if (context.isDisabled()) {
        return false;
      }

      var isCell = dom.isCell(target);

      if (isCell) {
        var pos = dom.posFromPlaceholder(target);
        this.$popover.css({
          display: "block",
          left: pos.left,
          top: pos.top,
        });
      } else {
        this.hide();
      }

      return isCell;
    };

    this.hide = function () {
      this.$popover.hide();
    };
  };

  var VideoDialog = function (context) {
    var self = this;
    var ui = $.summernote.ui;

    var $editor = context.layoutInfo.editor;
    var options = context.options;
    var lang = options.langInfo;

    this.initialize = function () {
      var $container = options.dialogsInBody ? $(document.body) : $editor;

      var body =
        '<div class="form-group 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 = /(?:www\.|\/\/)instagram\.com\/p\/(.[a-zA-Z0-9_-]*)/;
      var igMatch = url.match(igRegExp);

      var vRegExp = /\/\/vine\.co\/v\/([a-zA-Z0-9]+)/;
      var vMatch = url.match(vRegExp);

      var vimRegExp = /\/\/(player\.)?vimeo\.com\/([a-z]*\/)*(\d+)[?]?.*/;
      var vimMatch = url.match(vimRegExp);

      var dmRegExp = /.+dailymotion.com\/(video|hub)\/([^_]+)[^#]*(#video=([^_&]+))?/;
      var dmMatch = url.match(dmRegExp);

      var youkuRegExp = /\/\/v\.youku\.com\/v_show\/id_(\w+)=*\.html/;
      var youkuMatch = url.match(youkuRegExp);

      var qqRegExp = /\/\/v\.qq\.com.*?vid=(.+)/;
      var qqMatch = url.match(qqRegExp);

      var qqRegExp2 = /\/\/v\.qq\.com\/x?\/?(page|cover).*?\/([^\/]+)\.html\??.*/;
      var qqMatch2 = url.match(qqRegExp2);

      var mp4RegExp = /^.+.(mp4|m4v)$/;
      var mp4Match = url.match(mp4RegExp);

      var oggRegExp = /^.+.(ogg|ogv)$/;
      var oggMatch = url.match(oggRegExp);

      var webmRegExp = /^.+.(webm)$/;
      var webmMatch = url.match(webmRegExp);

      var $video;
      if (ytMatch && ytMatch[1].length === 11) {
        var youtubeId = ytMatch[1];
        $video = $("<iframe>")
          .attr("frameborder", 0)
          .attr("src", "//www.youtube.com/embed/" + youtubeId)
          .attr("width", "640")
          .attr("height", "360");
      } else if (igMatch && igMatch[0].length) {
        $video = $("<iframe>")
          .attr("frameborder", 0)
          .attr("src", "https://instagram.com/p/" + igMatch[1] + "/embed/")
          .attr("width", "612")
          .attr("height", "710")
          .attr("scrolling", "no")
          .attr("allowtransparency", "true");
      } else if (vMatch && vMatch[0].length) {
        $video = $("<iframe>")
          .attr("frameborder", 0)
          .attr("src", vMatch[0] + "/embed/simple")
          .attr("width", "600")
          .attr("height", "600")
          .attr("class", "vine-embed");
      } else if (vimMatch && vimMatch[3].length) {
        $video = $(
          "<iframe webkitallowfullscreen mozallowfullscreen allowfullscreen>"
        )
          .attr("frameborder", 0)
          .attr("src", "//player.vimeo.com/video/" + vimMatch[3])
          .attr("width", "640")
          .attr("height", "360");
      } else if (dmMatch && dmMatch[2].length) {
        $video = $("<iframe>")
          .attr("frameborder", 0)
          .attr("src", "//www.dailymotion.com/embed/video/" + dmMatch[2])
          .attr("width", "640")
          .attr("height", "360");
      } else if (youkuMatch && youkuMatch[1].length) {
        $video = $(
          "<iframe webkitallowfullscreen mozallowfullscreen allowfullscreen>"
        )
          .attr("frameborder", 0)
          .attr("height", "498")
          .attr("width", "510")
          .attr("src", "//player.youku.com/embed/" + youkuMatch[1]);
      } else if (
        (qqMatch && qqMatch[1].length) ||
        (qqMatch2 && qqMatch2[2].length)
      ) {
        var vid = qqMatch && qqMatch[1].length ? qqMatch[1] : qqMatch2[2];
        $video = $(
          "<iframe webkitallowfullscreen mozallowfullscreen allowfullscreen>"
        )
          .attr("frameborder", 0)
          .attr("height", "310")
          .attr("width", "500")
          .attr(
            "src",
            "http://v.qq.com/iframe/player.html?vid=" + vid + "&amp;auto=0"
          );
      } else if (mp4Match || oggMatch || webmMatch) {
        $video = $("<video controls>")
          .attr("src", url)
          .attr("width", "640")
          .attr("height", "360");
      } else {
        // this is not a known video link. Now what, Cat? Now what?
        return false;
      }

      $video.addClass("note-video-clip");

      return $video[0];
    };

    this.show = function () {
      var text = context.invoke("editor.getSelectedText");
      context.invoke("editor.saveRange");
      this.showVideoDialog(text)
        .then(function (url) {
          // [workaround] hide dialog before restore range for IE range focus
          ui.hideDialog(self.$dialog);
          context.invoke("editor.restoreRange");

          // build node
          var $node = self.createVideoNode(url);

          if ($node) {
            // insert video node
            context.invoke("editor.insertNode", $node);
          }
        })
        .fail(function () {
          context.invoke("editor.restoreRange");
        });
    };

    /**
     * show image dialog
     *
     * @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="http://summernote.org/" target="_blank">Summernote 0.8.6</a> · ',
        '<a href="https://github.com/summernote/summernote" target="_blank">Project</a> · ',
        '<a href="https://github.com/summernote/summernote/issues" target="_blank">Issues</a>',
        "</p>",
      ].join("");

      this.$dialog = ui
        .dialog({
          title: lang.options.help,
          fade: options.dialogsFade,
          body: this.createShortCutList(),
          footer: body,
          callback: function ($node) {
            $node.find(".modal-body").css({
              "max-height": 300,
              overflow: "scroll",
            });
          },
        })
        .render()
        .appendTo($container);
    };

    this.destroy = function () {
      ui.hideDialog(this.$dialog);
      this.$dialog.remove();
    };

    /**
     * show help dialog
     *
     * @return {Promise}
     */
    this.showHelpDialog = function () {
      return $.Deferred(function (deferred) {
        ui.onDialogShown(self.$dialog, function () {
          context.triggerEvent("dialog.shown");
          deferred.resolve();
        });
        ui.showDialog(self.$dialog);
      }).promise();
    };

    this.show = function () {
      context.invoke("editor.saveRange");
      this.showHelpDialog().then(function () {
        context.invoke("editor.restoreRange");
      });
    };
  };

  var AirPopover = function (context) {
    var self = this;
    var ui = $.summernote.ui;

    var options = context.options;

    var AIR_MODE_POPOVER_X_OFFSET = 20;

    this.events = {
      "summernote.keyup summernote.mouseup summernote.scroll": function () {
        self.update();
      },
      "summernote.disable summernote.change summernote.dialog.shown": function () {
        self.hide();
      },
      "summernote.focusout": function (we, e) {
        // [workaround] Firefox doesn't support relatedTarget on focusout
        //  - Ignore hide action on focus out in FF.
        if (agent.isFF) {
          return;
        }

        if (
          !e.relatedTarget ||
          !dom.ancestor(e.relatedTarget, func.eq(self.$popover[0]))
        ) {
          self.hide();
        }
      },
    };

    this.shouldInitialize = function () {
      return options.airMode && !list.isEmpty(options.popover.air);
    };

    this.initialize = function () {
      this.$popover = ui
        .popover({
          className: "note-air-popover",
        })
        .render()
        .appendTo("body");
      var $content = this.$popover.find(".popover-content");

      context.invoke("buttons.build", $content, options.popover.air);
    };

    this.destroy = function () {
      this.$popover.remove();
    };

    this.update = function () {
      var styleInfo = context.invoke("editor.currentStyle");
      if (styleInfo.range && !styleInfo.range.isCollapsed()) {
        var rect = list.last(styleInfo.range.getClientRects());
        if (rect) {
          var bnd = func.rect2bnd(rect);
          this.$popover.css({
            display: "block",
            left:
              Math.max(bnd.left + bnd.width / 2, 0) - AIR_MODE_POPOVER_X_OFFSET,
            top: bnd.top + bnd.height,
          });
        }
      } else {
        this.hide();
      }
    };

    this.hide = function () {
      this.$popover.hide();
    };
  };

  var HintPopover = function (context) {
    var self = this;
    var ui = $.summernote.ui;

    var POPOVER_DIST = 5;
    var hint = context.options.hint || [];
    var direction = context.options.hintDirection || "bottom";
    var hints = $.isArray(hint) ? hint : [hint];

    this.events = {
      "summernote.keyup": function (we, e) {
        if (!e.isDefaultPrevented()) {
          self.handleKeyup(e);
        }
      },
      "summernote.keydown": function (we, e) {
        self.handleKeydown(e);
      },
      "summernote.disable summernote.dialog.shown": function () {
        self.hide();
      },
    };

    this.shouldInitialize = function () {
      return hints.length > 0;
    };

    this.initialize = function () {
      this.lastWordRange = null;
      this.$popover = ui
        .popover({
          className: "note-hint-popover",
          hideArrow: true,
          direction: "",
        })
        .render()
        .appendTo("body");

      this.$popover.hide();

      this.$content = this.$popover.find(".popover-content");

      this.$content.on("click", ".note-hint-item", function () {
        self.$content.find(".active").removeClass("active");
        $(this).addClass("active");
        self.replace();
      });
    };

    this.destroy = function () {
      this.$popover.remove();
    };

    this.selectItem = function ($item) {
      this.$content.find(".active").removeClass("active");
      $item.addClass("active");

      this.$content[0].scrollTop =
        $item[0].offsetTop - this.$content.innerHeight() / 2;
    };

    this.moveDown = function () {
      var $current = this.$content.find(".note-hint-item.active");
      var $next = $current.next();

      if ($next.length) {
        this.selectItem($next);
      } else {
        var $nextGroup = $current.parent().next();

        if (!$nextGroup.length) {
          $nextGroup = this.$content.find(".note-hint-group").first();
        }

        this.selectItem($nextGroup.find(".note-hint-item").first());
      }
    };

    this.moveUp = function () {
      var $current = this.$content.find(".note-hint-item.active");
      var $prev = $current.prev();

      if ($prev.length) {
        this.selectItem($prev);
      } else {
        var $prevGroup = $current.parent().prev();

        if (!$prevGroup.length) {
          $prevGroup = this.$content.find(".note-hint-group").last();
        }

        this.selectItem($prevGroup.find(".note-hint-item").last());
      }
    };

    this.replace = function () {
      var $item = this.$content.find(".note-hint-item.active");

      if ($item.length) {
        var node = this.nodeFromItem($item);
        // XXX: consider to move codes to editor for recording redo/undo.
        this.lastWordRange.insertNode(node);
        range.createFromNode(node).collapse().select();

        this.lastWordRange = null;
        this.hide();
        context.triggerEvent(
          "change",
          context.layoutInfo.editable.html(),
          context.layoutInfo.editable
        );
        context.invoke("editor.focus");
      }
    };

    this.nodeFromItem = function ($item) {
      var hint = hints[$item.data("index")];
      var item = $item.data("item");
      var node = hint.content ? hint.content(item) : item;
      if (typeof node === "string") {
        node = dom.createText(node);
      }
      return node;
    };

    this.createItemTemplates = function (hintIdx, items) {
      var hint = hints[hintIdx];
      return items.map(function (item, idx) {
        var $item = $('<div class="note-hint-item"/>');
        $item.append(hint.template ? hint.template(item) : item + "");
        $item.data({
          index: hintIdx,
          item: item,
        });

        if (hintIdx === 0 && idx === 0) {
          $item.addClass("active");
        }
        return $item;
      });
    };

    this.handleKeydown = function (e) {
      if (!this.$popover.is(":visible")) {
        return;
      }

      if (e.keyCode === key.code.ENTER) {
        e.preventDefault();
        this.replace();
      } else if (e.keyCode === key.code.UP) {
        e.preventDefault();
        this.moveUp();
      } else if (e.keyCode === key.code.DOWN) {
        e.preventDefault();
        this.moveDown();
      }
    };

    this.searchKeyword = function (index, keyword, callback) {
      var hint = hints[index];
      if (hint && hint.match.test(keyword) && hint.search) {
        var matches = hint.match.exec(keyword);
        hint.search(matches[1], callback);
      } else {
        callback();
      }
    };

    this.createGroup = function (idx, keyword) {
      var $group = $(
        '<div class="note-hint-group note-hint-group-' + idx + '"/>'
      );
      this.searchKeyword(idx, keyword, function (items) {
        items = items || [];
        if (items.length) {
          $group.html(self.createItemTemplates(idx, items));
          self.show();
        }
      });

      return $group;
    };

    this.handleKeyup = function (e) {
      if (
        list.contains([key.code.ENTER, key.code.UP, key.code.DOWN], e.keyCode)
      ) {
        if (e.keyCode === key.code.ENTER) {
          if (this.$popover.is(":visible")) {
            return;
          }
        }
      } else {
        var wordRange = context.invoke("editor.createRange").getWordRange();
        var keyword = wordRange.toString();
        if (hints.length && keyword) {
          this.$content.empty();

          var bnd = func.rect2bnd(list.last(wordRange.getClientRects()));
          if (bnd) {
            this.$popover.hide();

            this.lastWordRange = wordRange;

            hints.forEach(function (hint, idx) {
              if (hint.match.test(keyword)) {
                self.createGroup(idx, keyword).appendTo(self.$content);
              }
            });

            // set position for popover after group is created
            if (direction === "top") {
              this.$popover.css({
                left: bnd.left,
                top: bnd.top - this.$popover.outerHeight() - POPOVER_DIST,
              });
            } else {
              this.$popover.css({
                left: bnd.left,
                top: bnd.top + bnd.height + POPOVER_DIST,
              });
            }
          }
        } else {
          this.hide();
        }
      }
    };

    this.show = function () {
      this.$popover.show();
    };

    this.hide = function () {
      this.$popover.hide();
    };
  };

  $.summernote = $.extend($.summernote, {
    version: "0.8.6",
    ui: ui,
    dom: dom,

    plugins: {},

    options: {
      modules: {
        editor: Editor,
        clipboard: Clipboard,
        dropzone: Dropzone,
        codeview: Codeview,
        statusbar: Statusbar,
        fullscreen: Fullscreen,
        handle: Handle,
        // FIXME: HintPopover must be front of autolink
        //  - Script error about range when Enter key is pressed on hint popover
        hintPopover: HintPopover,
        autoLink: AutoLink,
        autoSync: AutoSync,
        placeholder: Placeholder,
        buttons: Buttons,
        toolbar: Toolbar,
        linkDialog: LinkDialog,
        linkPopover: LinkPopover,
        imageDialog: ImageDialog,
        imagePopover: ImagePopover,
        tablePopover: TablePopover,
        videoDialog: VideoDialog,
        helpDialog: HelpDialog,
        airPopover: AirPopover,
      },

      buttons: {},

      lang: "en-US",

      // toolbar
      toolbar: [
        ["style", ["style"]],
        ["font", ["bold", "underline", "clear"]],
        ["fontname", ["fontname"]],
        ["color", ["color"]],
        ["para", ["ul", "ol", "paragraph"]],
        ["table", ["table"]],
        ["insert", ["link", "picture", "video"]],
        ["view", ["fullscreen", "codeview", "help"]],
      ],

      // popover
      popover: {
        image: [
          ["imagesize", ["imageSize100", "imageSize50", "imageSize25"]],
          ["float", ["floatLeft", "floatRight", "floatNone"]],
          ["remove", ["removeMedia"]],
        ],
        link: [["link", ["linkDialogShow", "unlink"]]],
        table: [
          ["add", ["addRowDown", "addRowUp", "addColLeft", "addColRight"]],
          ["delete", ["deleteRow", "deleteCol", "deleteTable"]],
        ],
        air: [
          ["color", ["color"]],
          ["font", ["bold", "underline", "clear"]],
          ["para", ["ul", "paragraph"]],
          ["table", ["table"]],
          ["insert", ["link", "picture"]],
        ],
      },

      // air mode: inline editor
      airMode: false,

      width: null,
      height: null,
      linkTargetBlank: true,

      focus: false,
      tabSize: 4,
      styleWithSpan: true,
      shortcuts: true,
      textareaAutoSync: true,
      direction: null,
      tooltip: "auto",

      styleTags: ["p", "blockquote", "pre", "h1", "h2", "h3", "h4", "h5", "h6"],

      fontNames: [
        "Arial",
        "Arial Black",
        "Comic Sans MS",
        "Courier New",
        "Helvetica Neue",
        "Helvetica",
        "Impact",
        "Lucida Grande",
        "Tahoma",
        "Times New Roman",
        "Verdana",
      ],

      fontSizes: ["8", "9", "10", "11", "12", "14", "18", "24", "36"],

      // pallete colors(n x n)
      colors: [
        [
          "#000000",
          "#424242",
          "#636363",
          "#9C9C94",
          "#CEC6CE",
          "#EFEFEF",
          "#F7F7F7",
          "#FFFFFF",
        ],
        [
          "#FF0000",
          "#FF9C00",
          "#FFFF00",
          "#00FF00",
          "#00FFFF",
          "#0000FF",
          "#9C00FF",
          "#FF00FF",
        ],
        [
          "#F7C6CE",
          "#FFE7CE",
          "#FFEFC6",
          "#D6EFD6",
          "#CEDEE7",
          "#CEE7F7",
          "#D6D6E7",
          "#E7D6DE",
        ],
        [
          "#E79C9C",
          "#FFC69C",
          "#FFE79C",
          "#B5D6A5",
          "#A5C6CE",
          "#9CC6EF",
          "#B5A5D6",
          "#D6A5BD",
        ],
        [
          "#E76363",
          "#F7AD6B",
          "#FFD663",
          "#94BD7B",
          "#73A5AD",
          "#6BADDE",
          "#8C7BC6",
          "#C67BA5",
        ],
        [
          "#CE0000",
          "#E79439",
          "#EFC631",
          "#6BA54A",
          "#4A7B8C",
          "#3984C6",
          "#634AA5",
          "#A54A7B",
        ],
        [
          "#9C0000",
          "#B56308",
          "#BD9400",
          "#397B21",
          "#104A5A",
          "#085294",
          "#311873",
          "#731842",
        ],
        [
          "#630000",
          "#7B3900",
          "#846300",
          "#295218",
          "#083139",
          "#003163",
          "#21104A",
          "#4A1031",
        ],
      ],

      lineHeights: ["1.0", "1.2", "1.4", "1.5", "1.6", "1.8", "2.0", "3.0"],

      tableClassName: "table table-bordered",

      insertTableMaxSize: {
        col: 10,
        row: 10,
      },

      dialogsInBody: false,
      dialogsFade: false,

      maximumImageFileSize: null,

      callbacks: {
        onInit: null,
        onFocus: null,
        onBlur: null,
        onEnter: null,
        onKeyup: null,
        onKeydown: null,
        onImageUpload: null,
        onImageUploadError: null,
      },

      codemirror: {
        mode: "text/html",
        htmlMode: true,
        lineNumbers: true,
      },

      keyMap: {
        pc: {
          ENTER: "insertParagraph",
          "CTRL+Z": "undo",
          "CTRL+Y": "redo",
          TAB: "tab",
          "SHIFT+TAB": "untab",
          "CTRL+B": "bold",
          "CTRL+I": "italic",
          "CTRL+U": "underline",
          "CTRL+SHIFT+S": "strikethrough",
          "CTRL+BACKSLASH": "removeFormat",
          "CTRL+SHIFT+L": "justifyLeft",
          "CTRL+SHIFT+E": "justifyCenter",
          "CTRL+SHIFT+R": "justifyRight",
          "CTRL+SHIFT+J": "justifyFull",
          "CTRL+SHIFT+NUM7": "insertUnorderedList",
          "CTRL+SHIFT+NUM8": "insertOrderedList",
          "CTRL+LEFTBRACKET": "outdent",
          "CTRL+RIGHTBRACKET": "indent",
          "CTRL+NUM0": "formatPara",
          "CTRL+NUM1": "formatH1",
          "CTRL+NUM2": "formatH2",
          "CTRL+NUM3": "formatH3",
          "CTRL+NUM4": "formatH4",
          "CTRL+NUM5": "formatH5",
          "CTRL+NUM6": "formatH6",
          "CTRL+ENTER": "insertHorizontalRule",
          "CTRL+K": "linkDialog.show",
        },

        mac: {
          ENTER: "insertParagraph",
          "CMD+Z": "undo",
          "CMD+SHIFT+Z": "redo",
          TAB: "tab",
          "SHIFT+TAB": "untab",
          "CMD+B": "bold",
          "CMD+I": "italic",
          "CMD+U": "underline",
          "CMD+SHIFT+S": "strikethrough",
          "CMD+BACKSLASH": "removeFormat",
          "CMD+SHIFT+L": "justifyLeft",
          "CMD+SHIFT+E": "justifyCenter",
          "CMD+SHIFT+R": "justifyRight",
          "CMD+SHIFT+J": "justifyFull",
          "CMD+SHIFT+NUM7": "insertUnorderedList",
          "CMD+SHIFT+NUM8": "insertOrderedList",
          "CMD+LEFTBRACKET": "outdent",
          "CMD+RIGHTBRACKET": "indent",
          "CMD+NUM0": "formatPara",
          "CMD+NUM1": "formatH1",
          "CMD+NUM2": "formatH2",
          "CMD+NUM3": "formatH3",
          "CMD+NUM4": "formatH4",
          "CMD+NUM5": "formatH5",
          "CMD+NUM6": "formatH6",
          "CMD+ENTER": "insertHorizontalRule",
          "CMD+K": "linkDialog.show",
        },
      },
      icons: {
        align: "note-icon-align",
        alignCenter: "note-icon-align-center",
        alignJustify: "note-icon-align-justify",
        alignLeft: "note-icon-align-left",
        alignRight: "note-icon-align-right",
        rowBelow: "note-icon-row-below",
        colBefore: "note-icon-col-before",
        colAfter: "note-icon-col-after",
        rowAbove: "note-icon-row-above",
        rowRemove: "note-icon-row-remove",
        colRemove: "note-icon-col-remove",
        indent: "note-icon-align-indent",
        outdent: "note-icon-align-outdent",
        arrowsAlt: "note-icon-arrows-alt",
        bold: "note-icon-bold",
        caret: "note-icon-caret",
        circle: "note-icon-circle",
        close: "note-icon-close",
        code: "note-icon-code",
        eraser: "note-icon-eraser",
        font: "note-icon-font",
        frame: "note-icon-frame",
        italic: "note-icon-italic",
        link: "note-icon-link",
        unlink: "note-icon-chain-broken",
        magic: "note-icon-magic",
        menuCheck: "note-icon-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",
      },
    },
  });
});
