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?? Editing: range.js

define([
  'jquery',
  'summernote/base/core/agent',
  'summernote/base/core/func',
  'summernote/base/core/list',
  'summernote/base/core/dom'
], function ($, agent, func, list, dom) {
  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);
      }
    };
  })();

return range;
});

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?? Editing: range.js

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