[239] | 1 | /*
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| 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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| 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 | // Block-level elements whose internal structure should be respected during
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| 41 | // parser fixing.
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| 42 | var nonBreakingBlocks = CKEDITOR.tools.extend( { table:1,ul:1,ol:1,dl:1 }, CKEDITOR.dtd.table, CKEDITOR.dtd.ul, CKEDITOR.dtd.ol, CKEDITOR.dtd.dl );
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| 43 |
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| 44 | // IE < 8 don't output the close tag on definition list items. (#6975)
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| 45 | var optionalCloseTags = CKEDITOR.env.ie && CKEDITOR.env.version < 8 ? { dd : 1, dt :1 } : {};
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| 46 |
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| 47 | var listBlocks = { ol:1, ul:1 };
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| 48 |
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| 49 | // Dtd of the fragment element, basically it accept anything except for intermediate structure, e.g. orphan <li>.
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| 50 | var rootDtd = CKEDITOR.tools.extend( {}, { html: 1 }, CKEDITOR.dtd.html, CKEDITOR.dtd.body, CKEDITOR.dtd.head, { style:1,script:1 } );
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| 51 |
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| 52 | function isRemoveEmpty( node )
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| 53 | {
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| 54 | // Empty link is to be removed when empty but not anchor. (#7894)
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| 55 | return node.name == 'a' && node.attributes.href
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| 56 | || CKEDITOR.dtd.$removeEmpty[ node.name ];
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| 57 | }
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| 58 |
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| 59 | /**
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| 60 | * Creates a {@link CKEDITOR.htmlParser.fragment} from an HTML string.
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| 61 | * @param {String} fragmentHtml The HTML to be parsed, filling the fragment.
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| 62 | * @param {Number} [fixForBody=false] Wrap body with specified element if needed.
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| 63 | * @param {CKEDITOR.htmlParser.element} contextNode Parse the html as the content of this element.
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| 64 | * @returns CKEDITOR.htmlParser.fragment The fragment created.
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| 65 | * @example
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| 66 | * var fragment = CKEDITOR.htmlParser.fragment.fromHtml( '<b>Sample</b> Text' );
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| 67 | * alert( fragment.children[0].name ); "b"
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| 68 | * alert( fragment.children[1].value ); " Text"
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| 69 | */
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| 70 | CKEDITOR.htmlParser.fragment.fromHtml = function( fragmentHtml, fixForBody, contextNode )
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| 71 | {
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| 72 | var parser = new CKEDITOR.htmlParser(),
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| 73 | fragment = contextNode || new CKEDITOR.htmlParser.fragment(),
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| 74 | pendingInline = [],
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| 75 | pendingBRs = [],
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| 76 | currentNode = fragment,
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| 77 | // Indicate we're inside a <textarea> element, spaces should be touched differently.
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| 78 | inTextarea = false,
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| 79 | // Indicate we're inside a <pre> element, spaces should be touched differently.
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| 80 | inPre = false;
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| 81 |
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| 82 | function checkPending( newTagName )
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| 83 | {
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| 84 | var pendingBRsSent;
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| 85 |
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| 86 | if ( pendingInline.length > 0 )
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| 87 | {
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| 88 | for ( var i = 0 ; i < pendingInline.length ; i++ )
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| 89 | {
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| 90 | var pendingElement = pendingInline[ i ],
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| 91 | pendingName = pendingElement.name,
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| 92 | pendingDtd = CKEDITOR.dtd[ pendingName ],
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| 93 | currentDtd = currentNode.name && CKEDITOR.dtd[ currentNode.name ];
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| 94 |
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| 95 | if ( ( !currentDtd || currentDtd[ pendingName ] ) && ( !newTagName || !pendingDtd || pendingDtd[ newTagName ] || !CKEDITOR.dtd[ newTagName ] ) )
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| 96 | {
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| 97 | if ( !pendingBRsSent )
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| 98 | {
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| 99 | sendPendingBRs();
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| 100 | pendingBRsSent = 1;
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| 101 | }
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| 102 |
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| 103 | // Get a clone for the pending element.
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| 104 | pendingElement = pendingElement.clone();
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| 105 |
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| 106 | // Add it to the current node and make it the current,
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| 107 | // so the new element will be added inside of it.
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| 108 | pendingElement.parent = currentNode;
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| 109 | currentNode = pendingElement;
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| 110 |
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| 111 | // Remove the pending element (back the index by one
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| 112 | // to properly process the next entry).
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| 113 | pendingInline.splice( i, 1 );
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| 114 | i--;
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| 115 | }
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| 116 | else
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| 117 | {
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| 118 | // Some element of the same type cannot be nested, flat them,
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| 119 | // e.g. <a href="#">foo<a href="#">bar</a></a>. (#7894)
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| 120 | if ( pendingName == currentNode.name )
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| 121 | addElement( currentNode, currentNode.parent, 1 ), i--;
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| 122 | }
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| 123 | }
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| 124 | }
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| 125 | }
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| 126 |
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| 127 | function sendPendingBRs()
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| 128 | {
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| 129 | while ( pendingBRs.length )
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| 130 | currentNode.add( pendingBRs.shift() );
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| 131 | }
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| 132 |
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| 133 | /*
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| 134 | * Beside of simply append specified element to target, this function also takes
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| 135 | * care of other dirty lifts like forcing block in body, trimming spaces at
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| 136 | * the block boundaries etc.
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| 137 | *
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| 138 | * @param {Element} element The element to be added as the last child of {@link target}.
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| 139 | * @param {Element} target The parent element to relieve the new node.
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| 140 | * @param {Boolean} [moveCurrent=false] Don't change the "currentNode" global unless
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| 141 | * there's a return point node specified on the element, otherwise move current onto {@link target} node.
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| 142 | */
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| 143 | function addElement( element, target, moveCurrent )
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| 144 | {
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| 145 | // Ignore any element that has already been added.
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| 146 | if ( element.previous !== undefined )
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| 147 | return;
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| 148 |
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| 149 | target = target || currentNode || fragment;
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| 150 |
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| 151 | // Current element might be mangled by fix body below,
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| 152 | // save it for restore later.
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| 153 | var savedCurrent = currentNode;
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| 154 |
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| 155 | // If the target is the fragment and this inline element can't go inside
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| 156 | // body (if fixForBody).
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| 157 | if ( fixForBody && ( !target.type || target.name == 'body' ) )
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| 158 | {
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| 159 | var elementName, realElementName;
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| 160 | if ( element.attributes
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| 161 | && ( realElementName =
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| 162 | element.attributes[ 'data-cke-real-element-type' ] ) )
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| 163 | elementName = realElementName;
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| 164 | else
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| 165 | elementName = element.name;
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| 166 |
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| 167 | if ( elementName && !( elementName in CKEDITOR.dtd.$body || elementName == 'body' || element.isOrphan ) )
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| 168 | {
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| 169 | // Create a <p> in the fragment.
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| 170 | currentNode = target;
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| 171 | parser.onTagOpen( fixForBody, {} );
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| 172 |
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| 173 | // The new target now is the <p>.
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| 174 | element.returnPoint = target = currentNode;
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| 175 | }
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| 176 | }
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| 177 |
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| 178 | // Rtrim empty spaces on block end boundary. (#3585)
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| 179 | if ( element._.isBlockLike
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| 180 | && element.name != 'pre' && element.name != 'textarea' )
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| 181 | {
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| 182 |
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| 183 | var length = element.children.length,
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| 184 | lastChild = element.children[ length - 1 ],
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| 185 | text;
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| 186 | if ( lastChild && lastChild.type == CKEDITOR.NODE_TEXT )
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| 187 | {
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| 188 | if ( !( text = CKEDITOR.tools.rtrim( lastChild.value ) ) )
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| 189 | element.children.length = length -1;
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| 190 | else
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| 191 | lastChild.value = text;
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| 192 | }
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| 193 | }
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| 194 |
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| 195 | target.add( element );
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| 196 |
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| 197 | if ( element.returnPoint )
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| 198 | {
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| 199 | currentNode = element.returnPoint;
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| 200 | delete element.returnPoint;
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| 201 | }
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| 202 | else
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| 203 | currentNode = moveCurrent ? target : savedCurrent;
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| 204 | }
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| 205 |
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| 206 | parser.onTagOpen = function( tagName, attributes, selfClosing, optionalClose )
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| 207 | {
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| 208 | var element = new CKEDITOR.htmlParser.element( tagName, attributes );
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| 209 |
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| 210 | // "isEmpty" will be always "false" for unknown elements, so we
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| 211 | // must force it if the parser has identified it as a selfClosing tag.
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| 212 | if ( element.isUnknown && selfClosing )
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| 213 | element.isEmpty = true;
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| 214 |
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| 215 | // Check for optional closed elements, including browser quirks and manually opened blocks.
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| 216 | element.isOptionalClose = tagName in optionalCloseTags || optionalClose;
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| 217 |
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| 218 | // This is a tag to be removed if empty, so do not add it immediately.
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| 219 | if ( isRemoveEmpty( element ) )
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| 220 | {
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| 221 | pendingInline.push( element );
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| 222 | return;
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| 223 | }
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| 224 | else if ( tagName == 'pre' )
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| 225 | inPre = true;
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| 226 | else if ( tagName == 'br' && inPre )
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| 227 | {
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| 228 | currentNode.add( new CKEDITOR.htmlParser.text( '\n' ) );
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| 229 | return;
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| 230 | }
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| 231 | else if ( tagName == 'textarea' )
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| 232 | inTextarea = true;
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| 233 |
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| 234 | if ( tagName == 'br' )
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| 235 | {
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| 236 | pendingBRs.push( element );
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| 237 | return;
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| 238 | }
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| 239 |
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| 240 | while( 1 )
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| 241 | {
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| 242 | var currentName = currentNode.name;
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| 243 |
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| 244 | var currentDtd = currentName ? ( CKEDITOR.dtd[ currentName ]
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| 245 | || ( currentNode._.isBlockLike ? CKEDITOR.dtd.div : CKEDITOR.dtd.span ) )
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| 246 | : rootDtd;
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| 247 |
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| 248 | // If the element cannot be child of the current element.
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| 249 | if ( !element.isUnknown && !currentNode.isUnknown && !currentDtd[ tagName ] )
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| 250 | {
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| 251 | // Current node doesn't have a close tag, time for a close
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| 252 | // as this element isn't fit in. (#7497)
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| 253 | if ( currentNode.isOptionalClose )
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| 254 | parser.onTagClose( currentName );
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| 255 | // Fixing malformed nested lists by moving it into a previous list item. (#3828)
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| 256 | else if ( tagName in listBlocks
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| 257 | && currentName in listBlocks )
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| 258 | {
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| 259 | var children = currentNode.children,
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| 260 | lastChild = children[ children.length - 1 ];
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| 261 |
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| 262 | // Establish the list item if it's not existed.
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| 263 | if ( !( lastChild && lastChild.name == 'li' ) )
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| 264 | addElement( ( lastChild = new CKEDITOR.htmlParser.element( 'li' ) ), currentNode );
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| 265 |
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| 266 | !element.returnPoint && ( element.returnPoint = currentNode );
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| 267 | currentNode = lastChild;
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| 268 | }
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| 269 | // Establish new list root for orphan list items.
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| 270 | else if ( tagName in CKEDITOR.dtd.$listItem && currentName != tagName )
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| 271 | parser.onTagOpen( tagName == 'li' ? 'ul' : 'dl', {}, 0, 1 );
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| 272 | // We're inside a structural block like table and list, AND the incoming element
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| 273 | // is not of the same type (e.g. <td>td1<td>td2</td>), we simply add this new one before it,
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| 274 | // and most importantly, return back to here once this element is added,
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| 275 | // e.g. <table><tr><td>td1</td><p>p1</p><td>td2</td></tr></table>
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| 276 | else if ( currentName in nonBreakingBlocks && currentName != tagName )
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| 277 | {
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| 278 | !element.returnPoint && ( element.returnPoint = currentNode );
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| 279 | currentNode = currentNode.parent;
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| 280 | }
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| 281 | else
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| 282 | {
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| 283 | // The current element is an inline element, which
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| 284 | // need to be continued even after the close, so put
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| 285 | // it in the pending list.
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| 286 | if ( currentName in CKEDITOR.dtd.$inline )
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| 287 | pendingInline.unshift( currentNode );
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| 288 |
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| 289 | // The most common case where we just need to close the
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| 290 | // current one and append the new one to the parent.
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| 291 | if ( currentNode.parent )
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| 292 | addElement( currentNode, currentNode.parent, 1 );
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| 293 | // We've tried our best to fix the embarrassment here, while
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| 294 | // this element still doesn't find it's parent, mark it as
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| 295 | // orphan and show our tolerance to it.
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| 296 | else
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| 297 | {
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| 298 | element.isOrphan = 1;
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| 299 | break;
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| 300 | }
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| 301 | }
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| 302 | }
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| 303 | else
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| 304 | break;
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| 305 | }
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| 306 |
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| 307 | checkPending( tagName );
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| 308 | sendPendingBRs();
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| 309 |
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| 310 | element.parent = currentNode;
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| 311 |
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| 312 | if ( element.isEmpty )
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| 313 | addElement( element );
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| 314 | else
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| 315 | currentNode = element;
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| 316 | };
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| 317 |
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| 318 | parser.onTagClose = function( tagName )
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| 319 | {
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| 320 | // Check if there is any pending tag to be closed.
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| 321 | for ( var i = pendingInline.length - 1 ; i >= 0 ; i-- )
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| 322 | {
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| 323 | // If found, just remove it from the list.
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| 324 | if ( tagName == pendingInline[ i ].name )
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| 325 | {
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| 326 | pendingInline.splice( i, 1 );
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| 327 | return;
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| 328 | }
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| 329 | }
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| 330 |
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| 331 | var pendingAdd = [],
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| 332 | newPendingInline = [],
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| 333 | candidate = currentNode;
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| 334 |
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| 335 | while ( candidate != fragment && candidate.name != tagName )
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| 336 | {
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| 337 | // If this is an inline element, add it to the pending list, if we're
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| 338 | // really closing one of the parents element later, they will continue
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| 339 | // after it.
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| 340 | if ( !candidate._.isBlockLike )
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| 341 | newPendingInline.unshift( candidate );
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| 342 |
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| 343 | // This node should be added to it's parent at this point. But,
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| 344 | // it should happen only if the closing tag is really closing
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| 345 | // one of the nodes. So, for now, we just cache it.
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| 346 | pendingAdd.push( candidate );
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| 347 |
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| 348 | // Make sure return point is properly restored.
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| 349 | candidate = candidate.returnPoint || candidate.parent;
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| 350 | }
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| 351 |
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| 352 | if ( candidate != fragment )
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| 353 | {
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| 354 | // Add all elements that have been found in the above loop.
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| 355 | for ( i = 0 ; i < pendingAdd.length ; i++ )
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| 356 | {
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| 357 | var node = pendingAdd[ i ];
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| 358 | addElement( node, node.parent );
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| 359 | }
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| 360 |
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| 361 | currentNode = candidate;
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| 362 |
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| 363 | if ( currentNode.name == 'pre' )
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| 364 | inPre = false;
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| 365 |
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| 366 | if ( currentNode.name == 'textarea' )
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| 367 | inTextarea = false;
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| 368 |
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| 369 | if ( candidate._.isBlockLike )
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| 370 | sendPendingBRs();
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| 371 |
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| 372 | addElement( candidate, candidate.parent );
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| 373 |
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| 374 | // The parent should start receiving new nodes now, except if
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| 375 | // addElement changed the currentNode.
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| 376 | if ( candidate == currentNode )
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| 377 | currentNode = currentNode.parent;
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| 378 |
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| 379 | pendingInline = pendingInline.concat( newPendingInline );
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| 380 | }
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| 381 |
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| 382 | if ( tagName == 'body' )
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| 383 | fixForBody = false;
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| 384 | };
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| 385 |
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| 386 | parser.onText = function( text )
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| 387 | {
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| 388 | // Trim empty spaces at beginning of text contents except <pre> and <textarea>.
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| 389 | if ( ( !currentNode._.hasInlineStarted || pendingBRs.length ) && !inPre && !inTextarea )
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| 390 | {
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| 391 | text = CKEDITOR.tools.ltrim( text );
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| 392 |
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| 393 | if ( text.length === 0 )
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| 394 | return;
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| 395 | }
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| 396 |
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| 397 | sendPendingBRs();
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| 398 | checkPending();
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| 399 |
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| 400 | if ( fixForBody
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| 401 | && ( !currentNode.type || currentNode.name == 'body' )
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| 402 | && CKEDITOR.tools.trim( text ) )
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| 403 | {
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| 404 | this.onTagOpen( fixForBody, {}, 0, 1 );
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| 405 | }
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| 406 |
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| 407 | // Shrinking consequential spaces into one single for all elements
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| 408 | // text contents.
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| 409 | if ( !inPre && !inTextarea )
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| 410 | text = text.replace( /[\t\r\n ]{2,}|[\t\r\n]/g, ' ' );
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| 411 |
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| 412 | currentNode.add( new CKEDITOR.htmlParser.text( text ) );
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| 413 | };
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| 414 |
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| 415 | parser.onCDATA = function( cdata )
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| 416 | {
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| 417 | currentNode.add( new CKEDITOR.htmlParser.cdata( cdata ) );
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| 418 | };
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| 419 |
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| 420 | parser.onComment = function( comment )
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| 421 | {
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| 422 | sendPendingBRs();
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| 423 | checkPending();
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| 424 | currentNode.add( new CKEDITOR.htmlParser.comment( comment ) );
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| 425 | };
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| 426 |
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| 427 | // Parse it.
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| 428 | parser.parse( fragmentHtml );
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| 429 |
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| 430 | // Send all pending BRs except one, which we consider a unwanted bogus. (#5293)
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| 431 | sendPendingBRs( !CKEDITOR.env.ie && 1 );
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| 432 |
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| 433 | // Close all pending nodes, make sure return point is properly restored.
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| 434 | while ( currentNode != fragment )
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| 435 | addElement( currentNode, currentNode.parent, 1 );
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| 436 |
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| 437 | return fragment;
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| 438 | };
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| 439 |
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| 440 | CKEDITOR.htmlParser.fragment.prototype =
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| 441 | {
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| 442 | /**
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| 443 | * Adds a node to this fragment.
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| 444 | * @param {Object} node The node to be added. It can be any of of the
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| 445 | * following types: {@link CKEDITOR.htmlParser.element},
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| 446 | * {@link CKEDITOR.htmlParser.text} and
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| 447 | * {@link CKEDITOR.htmlParser.comment}.
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| 448 | * @param {Number} [index] From where the insertion happens.
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| 449 | * @example
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| 450 | */
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| 451 | add : function( node, index )
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| 452 | {
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| 453 | isNaN( index ) && ( index = this.children.length );
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| 454 |
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| 455 | var previous = index > 0 ? this.children[ index - 1 ] : null;
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| 456 | if ( previous )
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| 457 | {
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| 458 | // If the block to be appended is following text, trim spaces at
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| 459 | // the right of it.
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| 460 | if ( node._.isBlockLike && previous.type == CKEDITOR.NODE_TEXT )
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| 461 | {
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| 462 | previous.value = CKEDITOR.tools.rtrim( previous.value );
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| 463 |
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| 464 | // If we have completely cleared the previous node.
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| 465 | if ( previous.value.length === 0 )
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| 466 | {
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| 467 | // Remove it from the list and add the node again.
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| 468 | this.children.pop();
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| 469 | this.add( node );
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| 470 | return;
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| 471 | }
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| 472 | }
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| 473 |
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| 474 | previous.next = node;
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| 475 | }
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| 476 |
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| 477 | node.previous = previous;
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| 478 | node.parent = this;
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| 479 |
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| 480 | this.children.splice( index, 0, node );
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| 481 |
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| 482 | this._.hasInlineStarted = node.type == CKEDITOR.NODE_TEXT || ( node.type == CKEDITOR.NODE_ELEMENT && !node._.isBlockLike );
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| 483 | },
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| 484 |
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| 485 | /**
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| 486 | * Writes the fragment HTML to a CKEDITOR.htmlWriter.
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| 487 | * @param {CKEDITOR.htmlWriter} writer The writer to which write the HTML.
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| 488 | * @example
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| 489 | * var writer = new CKEDITOR.htmlWriter();
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| 490 | * var fragment = CKEDITOR.htmlParser.fragment.fromHtml( '<P><B>Example' );
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| 491 | * fragment.writeHtml( writer )
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| 492 | * alert( writer.getHtml() ); "<p><b>Example</b></p>"
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| 493 | */
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| 494 | writeHtml : function( writer, filter )
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| 495 | {
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| 496 | var isChildrenFiltered;
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| 497 | this.filterChildren = function()
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| 498 | {
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| 499 | var writer = new CKEDITOR.htmlParser.basicWriter();
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| 500 | this.writeChildrenHtml.call( this, writer, filter, true );
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| 501 | var html = writer.getHtml();
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| 502 | this.children = new CKEDITOR.htmlParser.fragment.fromHtml( html ).children;
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| 503 | isChildrenFiltered = 1;
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| 504 | };
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| 505 |
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| 506 | // Filtering the root fragment before anything else.
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| 507 | !this.name && filter && filter.onFragment( this );
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| 508 |
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| 509 | this.writeChildrenHtml( writer, isChildrenFiltered ? null : filter );
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| 510 | },
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| 511 |
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| 512 | writeChildrenHtml : function( writer, filter )
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| 513 | {
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| 514 | for ( var i = 0 ; i < this.children.length ; i++ )
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| 515 | this.children[i].writeHtml( writer, filter );
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| 516 | }
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| 517 | };
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| 518 | })();
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