2 Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.
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3 For licensing, see LICENSE.html or http://ckeditor.com/license
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7 * @fileOverview Defines the {@link CKEDITOR.dom.node} class, which is the base
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8 * class for classes that represent DOM nodes.
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12 * Base class for classes representing DOM nodes. This constructor may return
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13 * and instance of classes that inherits this class, like
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14 * {@link CKEDITOR.dom.element} or {@link CKEDITOR.dom.text}.
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15 * @augments CKEDITOR.dom.domObject
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16 * @param {Object} domNode A native DOM node.
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18 * @see CKEDITOR.dom.element
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19 * @see CKEDITOR.dom.text
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22 CKEDITOR.dom.node = function( domNode )
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26 switch ( domNode.nodeType )
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28 // Safari don't consider document as element node type. (#3389)
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29 case CKEDITOR.NODE_DOCUMENT :
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30 return new CKEDITOR.dom.document( domNode );
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32 case CKEDITOR.NODE_ELEMENT :
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33 return new CKEDITOR.dom.element( domNode );
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35 case CKEDITOR.NODE_TEXT :
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36 return new CKEDITOR.dom.text( domNode );
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39 // Call the base constructor.
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40 CKEDITOR.dom.domObject.call( this, domNode );
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46 CKEDITOR.dom.node.prototype = new CKEDITOR.dom.domObject();
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49 * Element node type.
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53 CKEDITOR.NODE_ELEMENT = 1;
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56 * Document node type.
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60 CKEDITOR.NODE_DOCUMENT = 9;
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67 CKEDITOR.NODE_TEXT = 3;
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70 * Comment node type.
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74 CKEDITOR.NODE_COMMENT = 8;
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76 CKEDITOR.NODE_DOCUMENT_FRAGMENT = 11;
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78 CKEDITOR.POSITION_IDENTICAL = 0;
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79 CKEDITOR.POSITION_DISCONNECTED = 1;
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80 CKEDITOR.POSITION_FOLLOWING = 2;
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81 CKEDITOR.POSITION_PRECEDING = 4;
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82 CKEDITOR.POSITION_IS_CONTAINED = 8;
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83 CKEDITOR.POSITION_CONTAINS = 16;
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85 CKEDITOR.tools.extend( CKEDITOR.dom.node.prototype,
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86 /** @lends CKEDITOR.dom.node.prototype */
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89 * Makes this node child of another element.
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90 * @param {CKEDITOR.dom.element} element The target element to which append
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92 * @returns {CKEDITOR.dom.element} The target element.
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94 * var p = new CKEDITOR.dom.element( 'p' );
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95 * var strong = new CKEDITOR.dom.element( 'strong' );
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96 * strong.appendTo( p );
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98 * // result: "<p><strong></strong></p>"
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100 appendTo : function( element, toStart )
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102 element.append( this, toStart );
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106 clone : function( includeChildren, cloneId )
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108 var $clone = this.$.cloneNode( includeChildren );
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110 var removeIds = function( node )
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112 if ( node.nodeType != CKEDITOR.NODE_ELEMENT )
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116 node.removeAttribute( 'id', false );
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117 node.removeAttribute( 'data-cke-expando', false );
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119 if ( includeChildren )
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121 var childs = node.childNodes;
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122 for ( var i=0; i < childs.length; i++ )
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123 removeIds( childs[ i ] );
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127 // The "id" attribute should never be cloned to avoid duplication.
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128 removeIds( $clone );
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130 return new CKEDITOR.dom.node( $clone );
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133 hasPrevious : function()
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135 return !!this.$.previousSibling;
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138 hasNext : function()
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140 return !!this.$.nextSibling;
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144 * Inserts this element after a node.
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145 * @param {CKEDITOR.dom.node} node The that will preceed this element.
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146 * @returns {CKEDITOR.dom.node} The node preceeding this one after
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149 * var em = new CKEDITOR.dom.element( 'em' );
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150 * var strong = new CKEDITOR.dom.element( 'strong' );
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151 * strong.insertAfter( em );
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153 * // result: "<em></em><strong></strong>"
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155 insertAfter : function( node )
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157 node.$.parentNode.insertBefore( this.$, node.$.nextSibling );
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162 * Inserts this element before a node.
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163 * @param {CKEDITOR.dom.node} node The that will be after this element.
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164 * @returns {CKEDITOR.dom.node} The node being inserted.
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166 * var em = new CKEDITOR.dom.element( 'em' );
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167 * var strong = new CKEDITOR.dom.element( 'strong' );
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168 * strong.insertBefore( em );
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170 * // result: "<strong></strong><em></em>"
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172 insertBefore : function( node )
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174 node.$.parentNode.insertBefore( this.$, node.$ );
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178 insertBeforeMe : function( node )
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180 this.$.parentNode.insertBefore( node.$, this.$ );
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185 * Retrieves a uniquely identifiable tree address for this node.
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186 * The tree address returns is an array of integers, with each integer
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187 * indicating a child index of a DOM node, starting from
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188 * document.documentElement.
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190 * For example, assuming <body> is the second child from <html> (<head>
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191 * being the first), and we'd like to address the third child under the
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192 * fourth child of body, the tree address returned would be:
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195 * The tree address cannot be used for finding back the DOM tree node once
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196 * the DOM tree structure has been modified.
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198 getAddress : function( normalized )
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201 var $documentElement = this.getDocument().$.documentElement;
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204 while ( node && node != $documentElement )
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206 var parentNode = node.parentNode;
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207 var currentIndex = -1;
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211 for ( var i = 0 ; i < parentNode.childNodes.length ; i++ )
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213 var candidate = parentNode.childNodes[i];
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216 candidate.nodeType == 3 &&
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217 candidate.previousSibling &&
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218 candidate.previousSibling.nodeType == 3 )
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225 if ( candidate == node )
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229 address.unshift( currentIndex );
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239 * Gets the document containing this element.
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240 * @returns {CKEDITOR.dom.document} The document.
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242 * var element = CKEDITOR.document.getById( 'example' );
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243 * alert( <b>element.getDocument().equals( CKEDITOR.document )</b> ); // "true"
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245 getDocument : function()
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247 return new CKEDITOR.dom.document( this.$.ownerDocument || this.$.parentNode.ownerDocument );
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250 getIndex : function()
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254 var currentNode = $.parentNode && $.parentNode.firstChild;
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255 var currentIndex = -1;
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257 while ( currentNode )
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261 if ( currentNode == $ )
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262 return currentIndex;
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264 currentNode = currentNode.nextSibling;
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270 getNextSourceNode : function( startFromSibling, nodeType, guard )
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272 // If "guard" is a node, transform it in a function.
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273 if ( guard && !guard.call )
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275 var guardNode = guard;
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276 guard = function( node )
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278 return !node.equals( guardNode );
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282 var node = ( !startFromSibling && this.getFirst && this.getFirst() ),
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285 // Guarding when we're skipping the current element( no children or 'startFromSibling' ).
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286 // send the 'moving out' signal even we don't actually dive into.
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289 if ( this.type == CKEDITOR.NODE_ELEMENT && guard && guard( this, true ) === false )
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291 node = this.getNext();
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294 while ( !node && ( parent = ( parent || this ).getParent() ) )
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296 // The guard check sends the "true" paramenter to indicate that
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297 // we are moving "out" of the element.
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298 if ( guard && guard( parent, true ) === false )
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301 node = parent.getNext();
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307 if ( guard && guard( node ) === false )
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310 if ( nodeType && nodeType != node.type )
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311 return node.getNextSourceNode( false, nodeType, guard );
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316 getPreviousSourceNode : function( startFromSibling, nodeType, guard )
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318 if ( guard && !guard.call )
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320 var guardNode = guard;
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321 guard = function( node )
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323 return !node.equals( guardNode );
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327 var node = ( !startFromSibling && this.getLast && this.getLast() ),
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330 // Guarding when we're skipping the current element( no children or 'startFromSibling' ).
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331 // send the 'moving out' signal even we don't actually dive into.
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334 if ( this.type == CKEDITOR.NODE_ELEMENT && guard && guard( this, true ) === false )
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336 node = this.getPrevious();
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339 while ( !node && ( parent = ( parent || this ).getParent() ) )
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341 // The guard check sends the "true" paramenter to indicate that
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342 // we are moving "out" of the element.
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343 if ( guard && guard( parent, true ) === false )
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346 node = parent.getPrevious();
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352 if ( guard && guard( node ) === false )
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355 if ( nodeType && node.type != nodeType )
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356 return node.getPreviousSourceNode( false, nodeType, guard );
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361 getPrevious : function( evaluator )
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363 var previous = this.$, retval;
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366 previous = previous.previousSibling;
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367 retval = previous && new CKEDITOR.dom.node( previous );
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369 while ( retval && evaluator && !evaluator( retval ) )
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374 * Gets the node that follows this element in its parent's child list.
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375 * @param {Function} evaluator Filtering the result node.
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376 * @returns {CKEDITOR.dom.node} The next node or null if not available.
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378 * var element = CKEDITOR.dom.element.createFromHtml( '<div><b>Example</b> <i>next</i></div>' );
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379 * var first = <b>element.getFirst().getNext()</b>;
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380 * alert( first.getName() ); // "i"
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382 getNext : function( evaluator )
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384 var next = this.$, retval;
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387 next = next.nextSibling;
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388 retval = next && new CKEDITOR.dom.node( next );
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390 while ( retval && evaluator && !evaluator( retval ) )
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395 * Gets the parent element for this node.
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396 * @returns {CKEDITOR.dom.element} The parent element.
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398 * var node = editor.document.getBody().getFirst();
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399 * var parent = node.<b>getParent()</b>;
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400 * alert( node.getName() ); // "body"
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402 getParent : function()
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404 var parent = this.$.parentNode;
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405 return ( parent && parent.nodeType == 1 ) ? new CKEDITOR.dom.node( parent ) : null;
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408 getParents : function( closerFirst )
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415 parents[ closerFirst ? 'push' : 'unshift' ]( node );
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417 while ( ( node = node.getParent() ) )
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422 getCommonAncestor : function( node )
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424 if ( node.equals( this ) )
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427 if ( node.contains && node.contains( this ) )
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430 var start = this.contains ? this : this.getParent();
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434 if ( start.contains( node ) )
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437 while ( ( start = start.getParent() ) );
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442 getPosition : function( otherNode )
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445 var $other = otherNode.$;
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447 if ( $.compareDocumentPosition )
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448 return $.compareDocumentPosition( $other );
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450 // IE and Safari have no support for compareDocumentPosition.
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453 return CKEDITOR.POSITION_IDENTICAL;
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455 // Only element nodes support contains and sourceIndex.
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456 if ( this.type == CKEDITOR.NODE_ELEMENT && otherNode.type == CKEDITOR.NODE_ELEMENT )
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460 if ( $.contains( $other ) )
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461 return CKEDITOR.POSITION_CONTAINS + CKEDITOR.POSITION_PRECEDING;
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463 if ( $other.contains( $ ) )
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464 return CKEDITOR.POSITION_IS_CONTAINED + CKEDITOR.POSITION_FOLLOWING;
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467 if ( 'sourceIndex' in $ )
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469 return ( $.sourceIndex < 0 || $other.sourceIndex < 0 ) ? CKEDITOR.POSITION_DISCONNECTED :
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470 ( $.sourceIndex < $other.sourceIndex ) ? CKEDITOR.POSITION_PRECEDING :
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471 CKEDITOR.POSITION_FOLLOWING;
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475 // For nodes that don't support compareDocumentPosition, contains
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476 // or sourceIndex, their "address" is compared.
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478 var addressOfThis = this.getAddress(),
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479 addressOfOther = otherNode.getAddress(),
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480 minLevel = Math.min( addressOfThis.length, addressOfOther.length );
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482 // Determinate preceed/follow relationship.
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483 for ( var i = 0 ; i <= minLevel - 1 ; i++ )
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485 if ( addressOfThis[ i ] != addressOfOther[ i ] )
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487 if ( i < minLevel )
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489 return addressOfThis[ i ] < addressOfOther[ i ] ?
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490 CKEDITOR.POSITION_PRECEDING : CKEDITOR.POSITION_FOLLOWING;
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496 // Determinate contains/contained relationship.
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497 return ( addressOfThis.length < addressOfOther.length ) ?
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498 CKEDITOR.POSITION_CONTAINS + CKEDITOR.POSITION_PRECEDING :
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499 CKEDITOR.POSITION_IS_CONTAINED + CKEDITOR.POSITION_FOLLOWING;
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503 * Gets the closes ancestor node of a specified node name.
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504 * @param {String} name Node name of ancestor node.
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505 * @param {Boolean} includeSelf (Optional) Whether to include the current
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506 * node in the calculation or not.
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507 * @returns {CKEDITOR.dom.node} Ancestor node.
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509 getAscendant : function( name, includeSelf )
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513 if ( !includeSelf )
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518 if ( $.nodeName && $.nodeName.toLowerCase() == name )
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519 return new CKEDITOR.dom.node( $ );
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526 hasAscendant : function( name, includeSelf )
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530 if ( !includeSelf )
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535 if ( $.nodeName && $.nodeName.toLowerCase() == name )
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543 move : function( target, toStart )
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545 target.append( this.remove(), toStart );
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549 * Removes this node from the document DOM.
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550 * @param {Boolean} [preserveChildren] Indicates that the children
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551 * elements must remain in the document, removing only the outer
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554 * var element = CKEDITOR.dom.element.getById( 'MyElement' );
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555 * <b>element.remove()</b>;
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557 remove : function( preserveChildren )
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560 var parent = $.parentNode;
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564 if ( preserveChildren )
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566 // Move all children before the node.
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567 for ( var child ; ( child = $.firstChild ) ; )
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569 parent.insertBefore( $.removeChild( child ), $ );
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573 parent.removeChild( $ );
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579 replace : function( nodeToReplace )
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581 this.insertBefore( nodeToReplace );
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582 nodeToReplace.remove();
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594 while ( this.getFirst && ( child = this.getFirst() ) )
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596 if ( child.type == CKEDITOR.NODE_TEXT )
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598 var trimmed = CKEDITOR.tools.ltrim( child.getText() ),
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599 originalLength = child.getLength();
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606 else if ( trimmed.length < originalLength )
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608 child.split( originalLength - trimmed.length );
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610 // IE BUG: child.remove() may raise JavaScript errors here. (#81)
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611 this.$.removeChild( this.$.firstChild );
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621 while ( this.getLast && ( child = this.getLast() ) )
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623 if ( child.type == CKEDITOR.NODE_TEXT )
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625 var trimmed = CKEDITOR.tools.rtrim( child.getText() ),
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626 originalLength = child.getLength();
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633 else if ( trimmed.length < originalLength )
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635 child.split( trimmed.length );
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637 // IE BUG: child.getNext().remove() may raise JavaScript errors here.
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639 this.$.lastChild.parentNode.removeChild( this.$.lastChild );
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645 if ( !CKEDITOR.env.ie && !CKEDITOR.env.opera )
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647 child = this.$.lastChild;
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649 if ( child && child.type == 1 && child.nodeName.toLowerCase() == 'br' )
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651 // Use "eChildNode.parentNode" instead of "node" to avoid IE bug (#324).
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652 child.parentNode.removeChild( child ) ;
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658 * Checks is this node is read-only (should not be changed). It
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659 * additionaly returns the element, if any, which defines the read-only
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660 * state of this node. It may be the node itself or any of its parent
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662 * @returns {CKEDITOR.dom.element|Boolean} An element containing
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663 * read-only attributes or "false" if none is found.
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666 * // For the following HTML:
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667 * // <div contenteditable="false">Some <b>text</b></div>
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669 * // If "ele" is the above <div>
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670 * ele.isReadOnly(); // the <div> element
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672 * // If "ele" is the above <b>
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673 * ele.isReadOnly(); // the <div> element
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675 isReadOnly : function()
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677 var current = this;
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680 if ( current.type == CKEDITOR.NODE_ELEMENT )
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682 if ( current.is( 'body' ) || !!current.data( 'cke-editable' ) )
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685 if ( current.getAttribute( 'contentEditable' ) == 'false' )
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687 else if ( current.getAttribute( 'contentEditable' ) == 'true' )
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690 current = current.getParent();
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