[2862] | 1 | /*
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| 2 | Copyright (c) 2003-2010, 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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| 4 | */
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| 5 |
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| 6 | /**
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| 7 | * A lightweight representation of an HTML DOM structure.
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| 8 | * @constructor
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| 9 | * @example
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| 10 | */
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| 11 | CKEDITOR.htmlParser.fragment = function()
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| 12 | {
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| 13 | /**
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| 14 | * The nodes contained in the root of this fragment.
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| 15 | * @type Array
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| 16 | * @example
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| 17 | * var fragment = CKEDITOR.htmlParser.fragment.fromHtml( '<b>Sample</b> Text' );
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| 18 | * alert( fragment.children.length ); "2"
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| 19 | */
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| 20 | this.children = [];
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| 21 |
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| 22 | /**
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| 23 | * Get the fragment parent. Should always be null.
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| 24 | * @type Object
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| 25 | * @default null
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| 26 | * @example
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| 27 | */
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| 28 | this.parent = null;
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| 29 |
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| 30 | /** @private */
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| 31 | this._ =
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| 32 | {
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| 33 | isBlockLike : true,
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| 34 | hasInlineStarted : false
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| 35 | };
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| 36 | };
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| 37 |
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| 38 | (function()
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| 39 | {
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| 40 | // Elements which the end tag is marked as optional in the HTML 4.01 DTD
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| 41 | // (expect empty elements).
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| 42 | var optionalClose = {colgroup:1,dd:1,dt:1,li:1,option:1,p:1,td:1,tfoot:1,th:1,thead:1,tr:1};
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| 43 |
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| 44 | // Block-level elements whose internal structure should be respected during
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| 45 | // parser fixing.
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| 46 | var nonBreakingBlocks = CKEDITOR.tools.extend(
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| 47 | {table:1,ul:1,ol:1,dl:1},
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| 48 | CKEDITOR.dtd.table, CKEDITOR.dtd.ul, CKEDITOR.dtd.ol, CKEDITOR.dtd.dl ),
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| 49 | listBlocks = CKEDITOR.dtd.$list, listItems = CKEDITOR.dtd.$listItem;
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| 50 |
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| 51 | /**
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| 52 | * Creates a {@link CKEDITOR.htmlParser.fragment} from an HTML string.
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| 53 | * @param {String} fragmentHtml The HTML to be parsed, filling the fragment.
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| 54 | * @param {Number} [fixForBody=false] Wrap body with specified element if needed.
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| 55 | * @returns CKEDITOR.htmlParser.fragment The fragment created.
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| 56 | * @example
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| 57 | * var fragment = CKEDITOR.htmlParser.fragment.fromHtml( '<b>Sample</b> Text' );
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| 58 | * alert( fragment.children[0].name ); "b"
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| 59 | * alert( fragment.children[1].value ); " Text"
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| 60 | */
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| 61 | CKEDITOR.htmlParser.fragment.fromHtml = function( fragmentHtml, fixForBody )
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| 62 | {
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| 63 | var parser = new CKEDITOR.htmlParser(),
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| 64 | html = [],
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| 65 | fragment = new CKEDITOR.htmlParser.fragment(),
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| 66 | pendingInline = [],
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| 67 | pendingBRs = [],
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| 68 | currentNode = fragment,
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| 69 | // Indicate we're inside a <pre> element, spaces should be touched differently.
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| 70 | inPre = false,
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| 71 | returnPoint;
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| 72 |
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| 73 | function checkPending( newTagName )
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| 74 | {
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| 75 | var pendingBRsSent;
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| 76 |
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| 77 | if ( pendingInline.length > 0 )
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| 78 | {
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| 79 | for ( var i = 0 ; i < pendingInline.length ; i++ )
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| 80 | {
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| 81 | var pendingElement = pendingInline[ i ],
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| 82 | pendingName = pendingElement.name,
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| 83 | pendingDtd = CKEDITOR.dtd[ pendingName ],
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| 84 | currentDtd = currentNode.name && CKEDITOR.dtd[ currentNode.name ];
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| 85 |
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| 86 | if ( ( !currentDtd || currentDtd[ pendingName ] ) && ( !newTagName || !pendingDtd || pendingDtd[ newTagName ] || !CKEDITOR.dtd[ newTagName ] ) )
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| 87 | {
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| 88 | if ( !pendingBRsSent )
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| 89 | {
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| 90 | sendPendingBRs();
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| 91 | pendingBRsSent = 1;
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| 92 | }
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| 93 |
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| 94 | // Get a clone for the pending element.
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| 95 | pendingElement = pendingElement.clone();
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| 96 |
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| 97 | // Add it to the current node and make it the current,
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| 98 | // so the new element will be added inside of it.
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| 99 | pendingElement.parent = currentNode;
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| 100 | currentNode = pendingElement;
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| 101 |
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| 102 | // Remove the pending element (back the index by one
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| 103 | // to properly process the next entry).
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| 104 | pendingInline.splice( i, 1 );
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| 105 | i--;
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| 106 | }
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| 107 | }
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| 108 | }
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| 109 | }
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| 110 |
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| 111 | function sendPendingBRs()
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| 112 | {
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| 113 | while ( pendingBRs.length )
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| 114 | currentNode.add( pendingBRs.shift() );
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| 115 | }
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| 116 |
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| 117 | function addElement( element, target, enforceCurrent )
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| 118 | {
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| 119 | target = target || currentNode || fragment;
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| 120 |
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| 121 | // If the target is the fragment and this element can't go inside
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| 122 | // body (if fixForBody).
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| 123 | if ( fixForBody && !target.type )
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| 124 | {
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| 125 | var elementName, realElementName;
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| 126 | if ( element.attributes
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| 127 | && ( realElementName =
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| 128 | element.attributes[ '_cke_real_element_type' ] ) )
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| 129 | elementName = realElementName;
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| 130 | else
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| 131 | elementName = element.name;
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| 132 | if ( elementName
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| 133 | && !( elementName in CKEDITOR.dtd.$body )
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| 134 | && !( elementName in CKEDITOR.dtd.$nonBodyContent ) )
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| 135 | {
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| 136 | var savedCurrent = currentNode;
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| 137 |
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| 138 | // Create a <p> in the fragment.
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| 139 | currentNode = target;
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| 140 | parser.onTagOpen( fixForBody, {} );
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| 141 |
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| 142 | // The new target now is the <p>.
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| 143 | target = currentNode;
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| 144 |
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| 145 | if ( enforceCurrent )
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| 146 | currentNode = savedCurrent;
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| 147 | }
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| 148 | }
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| 149 |
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| 150 | // Rtrim empty spaces on block end boundary. (#3585)
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| 151 | if ( element._.isBlockLike
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| 152 | && element.name != 'pre' )
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| 153 | {
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| 154 |
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| 155 | var length = element.children.length,
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| 156 | lastChild = element.children[ length - 1 ],
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| 157 | text;
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| 158 | if ( lastChild && lastChild.type == CKEDITOR.NODE_TEXT )
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| 159 | {
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| 160 | if ( !( text = CKEDITOR.tools.rtrim( lastChild.value ) ) )
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| 161 | element.children.length = length -1;
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| 162 | else
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| 163 | lastChild.value = text;
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| 164 | }
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| 165 | }
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| 166 |
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| 167 | target.add( element );
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| 168 |
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| 169 | if ( element.returnPoint )
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| 170 | {
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| 171 | currentNode = element.returnPoint;
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| 172 | delete element.returnPoint;
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| 173 | }
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| 174 | }
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| 175 |
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| 176 | parser.onTagOpen = function( tagName, attributes, selfClosing )
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| 177 | {
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| 178 | var element = new CKEDITOR.htmlParser.element( tagName, attributes );
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| 179 |
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| 180 | // "isEmpty" will be always "false" for unknown elements, so we
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| 181 | // must force it if the parser has identified it as a selfClosing tag.
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| 182 | if ( element.isUnknown && selfClosing )
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| 183 | element.isEmpty = true;
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| 184 |
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| 185 | // This is a tag to be removed if empty, so do not add it immediately.
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| 186 | if ( CKEDITOR.dtd.$removeEmpty[ tagName ] )
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| 187 | {
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| 188 | pendingInline.push( element );
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| 189 | return;
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| 190 | }
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| 191 | else if ( tagName == 'pre' )
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| 192 | inPre = true;
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| 193 | else if ( tagName == 'br' && inPre )
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| 194 | {
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| 195 | currentNode.add( new CKEDITOR.htmlParser.text( '\n' ) );
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| 196 | return;
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| 197 | }
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| 198 |
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| 199 | if ( tagName == 'br' )
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| 200 | {
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| 201 | pendingBRs.push( element );
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| 202 | return;
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| 203 | }
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| 204 |
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| 205 | var currentName = currentNode.name;
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| 206 |
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| 207 | var currentDtd = currentName
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| 208 | && ( CKEDITOR.dtd[ currentName ]
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| 209 | || ( currentNode._.isBlockLike ? CKEDITOR.dtd.div : CKEDITOR.dtd.span ) );
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| 210 |
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| 211 | // If the element cannot be child of the current element.
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| 212 | if ( currentDtd // Fragment could receive any elements.
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| 213 | && !element.isUnknown && !currentNode.isUnknown && !currentDtd[ tagName ] )
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| 214 | {
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| 215 |
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| 216 | var reApply = false,
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| 217 | addPoint; // New position to start adding nodes.
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| 218 |
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| 219 | // Fixing malformed nested lists by moving it into a previous list item. (#3828)
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| 220 | if ( tagName in listBlocks
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| 221 | && currentName in listBlocks )
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| 222 | {
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| 223 | var children = currentNode.children,
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| 224 | lastChild = children[ children.length - 1 ];
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| 225 |
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| 226 | // Establish the list item if it's not existed.
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| 227 | if ( !( lastChild && lastChild.name in listItems ) )
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| 228 | addElement( ( lastChild = new CKEDITOR.htmlParser.element( 'li' ) ), currentNode );
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| 229 |
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| 230 | returnPoint = currentNode, addPoint = lastChild;
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| 231 | }
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| 232 | // If the element name is the same as the current element name,
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| 233 | // then just close the current one and append the new one to the
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| 234 | // parent. This situation usually happens with <p>, <li>, <dt> and
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| 235 | // <dd>, specially in IE. Do not enter in this if block in this case.
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| 236 | else if ( tagName == currentName )
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| 237 | {
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| 238 | addElement( currentNode, currentNode.parent );
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| 239 | }
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| 240 | else
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| 241 | {
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| 242 | if ( nonBreakingBlocks[ currentName ] )
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| 243 | {
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| 244 | if ( !returnPoint )
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| 245 | returnPoint = currentNode;
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| 246 | }
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| 247 | else
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| 248 | {
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| 249 | addElement( currentNode, currentNode.parent, true );
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| 250 |
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| 251 | if ( !optionalClose[ currentName ] )
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| 252 | {
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| 253 | // The current element is an inline element, which
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| 254 | // cannot hold the new one. Put it in the pending list,
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| 255 | // and try adding the new one after it.
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| 256 | pendingInline.unshift( currentNode );
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| 257 | }
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| 258 | }
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| 259 |
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| 260 | reApply = true;
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| 261 | }
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| 262 |
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| 263 | if ( addPoint )
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| 264 | currentNode = addPoint;
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| 265 | // Try adding it to the return point, or the parent element.
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| 266 | else
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| 267 | currentNode = currentNode.returnPoint || currentNode.parent;
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| 268 |
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| 269 | if ( reApply )
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| 270 | {
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| 271 | parser.onTagOpen.apply( this, arguments );
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| 272 | return;
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| 273 | }
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| 274 | }
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| 275 |
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| 276 | checkPending( tagName );
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| 277 | sendPendingBRs();
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| 278 |
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| 279 | element.parent = currentNode;
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| 280 | element.returnPoint = returnPoint;
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| 281 | returnPoint = 0;
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| 282 |
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| 283 | if ( element.isEmpty )
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| 284 | addElement( element );
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| 285 | else
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| 286 | currentNode = element;
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| 287 | };
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| 288 |
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| 289 | parser.onTagClose = function( tagName )
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| 290 | {
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| 291 | // Check if there is any pending tag to be closed.
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| 292 | for ( var i = pendingInline.length - 1 ; i >= 0 ; i-- )
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| 293 | {
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| 294 | // If found, just remove it from the list.
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| 295 | if ( tagName == pendingInline[ i ].name )
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| 296 | {
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| 297 | pendingInline.splice( i, 1 );
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| 298 | return;
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| 299 | }
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| 300 | }
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| 301 |
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| 302 | var pendingAdd = [],
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| 303 | newPendingInline = [],
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| 304 | candidate = currentNode;
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| 305 |
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| 306 | while ( candidate.type && candidate.name != tagName )
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| 307 | {
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| 308 | // If this is an inline element, add it to the pending list, if we're
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| 309 | // really closing one of the parents element later, they will continue
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| 310 | // after it.
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| 311 | if ( !candidate._.isBlockLike )
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| 312 | newPendingInline.unshift( candidate );
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| 313 |
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| 314 | // This node should be added to it's parent at this point. But,
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| 315 | // it should happen only if the closing tag is really closing
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| 316 | // one of the nodes. So, for now, we just cache it.
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| 317 | pendingAdd.push( candidate );
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| 318 |
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| 319 | candidate = candidate.parent;
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| 320 | }
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| 321 |
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| 322 | if ( candidate.type )
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| 323 | {
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| 324 | // Add all elements that have been found in the above loop.
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| 325 | for ( i = 0 ; i < pendingAdd.length ; i++ )
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| 326 | {
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| 327 | var node = pendingAdd[ i ];
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| 328 | addElement( node, node.parent );
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| 329 | }
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| 330 |
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| 331 | currentNode = candidate;
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| 332 |
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| 333 | if ( currentNode.name == 'pre' )
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| 334 | inPre = false;
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| 335 |
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| 336 | if ( candidate._.isBlockLike )
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| 337 | sendPendingBRs();
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| 338 |
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| 339 | addElement( candidate, candidate.parent );
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| 340 |
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| 341 | // The parent should start receiving new nodes now, except if
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| 342 | // addElement changed the currentNode.
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| 343 | if ( candidate == currentNode )
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| 344 | currentNode = currentNode.parent;
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| 345 |
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| 346 | pendingInline = pendingInline.concat( newPendingInline );
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| 347 | }
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| 348 |
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| 349 | if ( tagName == 'body' )
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| 350 | fixForBody = false;
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| 351 | };
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| 352 |
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| 353 | parser.onText = function( text )
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| 354 | {
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| 355 | // Trim empty spaces at beginning of element contents except <pre>.
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| 356 | if ( !currentNode._.hasInlineStarted && !inPre )
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| 357 | {
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| 358 | text = CKEDITOR.tools.ltrim( text );
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| 359 |
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| 360 | if ( text.length === 0 )
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| 361 | return;
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| 362 | }
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| 363 |
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| 364 | sendPendingBRs();
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| 365 | checkPending();
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| 366 |
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| 367 | if ( fixForBody
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| 368 | && ( !currentNode.type || currentNode.name == 'body' )
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| 369 | && CKEDITOR.tools.trim( text ) )
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| 370 | {
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| 371 | this.onTagOpen( fixForBody, {} );
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| 372 | }
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| 373 |
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| 374 | // Shrinking consequential spaces into one single for all elements
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| 375 | // text contents.
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| 376 | if ( !inPre )
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| 377 | text = text.replace( /[\t\r\n ]{2,}|[\t\r\n]/g, ' ' );
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| 378 |
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| 379 | currentNode.add( new CKEDITOR.htmlParser.text( text ) );
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| 380 | };
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| 381 |
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| 382 | parser.onCDATA = function( cdata )
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| 383 | {
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| 384 | currentNode.add( new CKEDITOR.htmlParser.cdata( cdata ) );
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| 385 | };
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| 386 |
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| 387 | parser.onComment = function( comment )
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| 388 | {
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| 389 | currentNode.add( new CKEDITOR.htmlParser.comment( comment ) );
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| 390 | };
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| 391 |
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| 392 | // Parse it.
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| 393 | parser.parse( fragmentHtml );
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| 394 |
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| 395 | sendPendingBRs();
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| 396 |
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| 397 | // Close all pending nodes.
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| 398 | while ( currentNode.type )
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| 399 | {
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| 400 | var parent = currentNode.parent,
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| 401 | node = currentNode;
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| 402 |
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| 403 | if ( fixForBody
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| 404 | && ( !parent.type || parent.name == 'body' )
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| 405 | && !CKEDITOR.dtd.$body[ node.name ] )
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| 406 | {
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| 407 | currentNode = parent;
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| 408 | parser.onTagOpen( fixForBody, {} );
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| 409 | parent = currentNode;
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| 410 | }
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| 411 |
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| 412 | parent.add( node );
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| 413 | currentNode = parent;
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| 414 | }
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| 415 |
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| 416 | return fragment;
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| 417 | };
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| 418 |
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| 419 | CKEDITOR.htmlParser.fragment.prototype =
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| 420 | {
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| 421 | /**
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| 422 | * Adds a node to this fragment.
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| 423 | * @param {Object} node The node to be added. It can be any of of the
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| 424 | * following types: {@link CKEDITOR.htmlParser.element},
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| 425 | * {@link CKEDITOR.htmlParser.text} and
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| 426 | * {@link CKEDITOR.htmlParser.comment}.
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| 427 | * @example
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| 428 | */
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| 429 | add : function( node )
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| 430 | {
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| 431 | var len = this.children.length,
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| 432 | previous = len > 0 && this.children[ len - 1 ] || null;
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| 433 |
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| 434 | if ( previous )
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| 435 | {
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| 436 | // If the block to be appended is following text, trim spaces at
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| 437 | // the right of it.
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| 438 | if ( node._.isBlockLike && previous.type == CKEDITOR.NODE_TEXT )
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| 439 | {
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| 440 | previous.value = CKEDITOR.tools.rtrim( previous.value );
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| 441 |
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| 442 | // If we have completely cleared the previous node.
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| 443 | if ( previous.value.length === 0 )
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| 444 | {
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| 445 | // Remove it from the list and add the node again.
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| 446 | this.children.pop();
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| 447 | this.add( node );
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| 448 | return;
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| 449 | }
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| 450 | }
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| 451 |
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| 452 | previous.next = node;
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| 453 | }
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| 454 |
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| 455 | node.previous = previous;
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| 456 | node.parent = this;
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| 457 |
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| 458 | this.children.push( node );
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| 459 |
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| 460 | this._.hasInlineStarted = node.type == CKEDITOR.NODE_TEXT || ( node.type == CKEDITOR.NODE_ELEMENT && !node._.isBlockLike );
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| 461 | },
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| 462 |
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| 463 | /**
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| 464 | * Writes the fragment HTML to a CKEDITOR.htmlWriter.
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| 465 | * @param {CKEDITOR.htmlWriter} writer The writer to which write the HTML.
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| 466 | * @example
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| 467 | * var writer = new CKEDITOR.htmlWriter();
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| 468 | * var fragment = CKEDITOR.htmlParser.fragment.fromHtml( '<P><B>Example' );
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| 469 | * fragment.writeHtml( writer )
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| 470 | * alert( writer.getHtml() ); "<p><b>Example</b></p>"
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| 471 | */
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| 472 | writeHtml : function( writer, filter )
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| 473 | {
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| 474 | var isChildrenFiltered;
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| 475 | this.filterChildren = function()
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| 476 | {
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| 477 | var writer = new CKEDITOR.htmlParser.basicWriter();
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| 478 | this.writeChildrenHtml.call( this, writer, filter, true );
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| 479 | var html = writer.getHtml();
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| 480 | this.children = new CKEDITOR.htmlParser.fragment.fromHtml( html ).children;
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| 481 | isChildrenFiltered = 1;
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| 482 | };
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| 483 |
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| 484 | // Filtering the root fragment before anything else.
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| 485 | !this.name && filter && filter.onFragment( this );
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| 486 |
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| 487 | this.writeChildrenHtml( writer, isChildrenFiltered ? null : filter );
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| 488 | },
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| 489 |
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| 490 | writeChildrenHtml : function( writer, filter )
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| 491 | {
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| 492 | for ( var i = 0 ; i < this.children.length ; i++ )
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| 493 | this.children[i].writeHtml( writer, filter );
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| 494 | }
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| 495 | };
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| 496 | })();
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