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 * A lightweight representation of an HTML DOM structure.
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11 CKEDITOR.htmlParser.fragment = function()
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14 * The nodes contained in the root of this fragment.
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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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23 * Get the fragment parent. Should always be null.
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34 hasInlineStarted : false
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40 // Block-level elements whose internal structure should be respected during
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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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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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47 var listBlocks = { ol:1, ul:1 };
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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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52 function isRemoveEmpty( node )
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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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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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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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70 CKEDITOR.htmlParser.fragment.fromHtml = function( fragmentHtml, fixForBody, contextNode )
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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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76 currentNode = fragment,
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77 // Indicate we're inside a <textarea> element, spaces should be touched differently.
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79 // Indicate we're inside a <pre> element, spaces should be touched differently.
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82 function checkPending( newTagName )
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86 if ( pendingInline.length > 0 )
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88 for ( var i = 0 ; i < pendingInline.length ; i++ )
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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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95 if ( ( !currentDtd || currentDtd[ pendingName ] ) && ( !newTagName || !pendingDtd || pendingDtd[ newTagName ] || !CKEDITOR.dtd[ newTagName ] ) )
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97 if ( !pendingBRsSent )
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100 pendingBRsSent = 1;
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103 // Get a clone for the pending element.
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104 pendingElement = pendingElement.clone();
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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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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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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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127 function sendPendingBRs()
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129 while ( pendingBRs.length )
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130 currentNode.add( pendingBRs.shift() );
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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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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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143 function addElement( element, target, moveCurrent )
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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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149 target = target || currentNode || fragment;
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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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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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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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165 elementName = element.name;
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167 if ( elementName && !( elementName in CKEDITOR.dtd.$body || elementName == 'body' || element.isOrphan ) )
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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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173 // The new target now is the <p>.
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174 element.returnPoint = target = currentNode;
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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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183 var length = element.children.length,
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184 lastChild = element.children[ length - 1 ],
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186 if ( lastChild && lastChild.type == CKEDITOR.NODE_TEXT )
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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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191 lastChild.value = text;
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195 target.add( element );
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197 if ( element.returnPoint )
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199 currentNode = element.returnPoint;
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200 delete element.returnPoint;
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203 currentNode = moveCurrent ? target : savedCurrent;
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206 parser.onTagOpen = function( tagName, attributes, selfClosing, optionalClose )
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208 var element = new CKEDITOR.htmlParser.element( tagName, attributes );
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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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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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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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221 pendingInline.push( element );
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224 else if ( tagName == 'pre' )
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226 else if ( tagName == 'br' && inPre )
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228 currentNode.add( new CKEDITOR.htmlParser.text( '\n' ) );
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231 else if ( tagName == 'textarea' )
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234 if ( tagName == 'br' )
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236 pendingBRs.push( element );
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242 var currentName = currentNode.name;
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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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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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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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259 var children = currentNode.children,
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260 lastChild = children[ children.length - 1 ];
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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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266 !element.returnPoint && ( element.returnPoint = currentNode );
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267 currentNode = lastChild;
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269 // Establish new list root for orphan list items.
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270 else if ( tagName in CKEDITOR.dtd.$listItem && currentName != tagName )
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271 parser.onTagOpen( tagName == 'li' ? 'ul' : 'dl', {}, 0, 1 );
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272 // We're inside a structural block like table and list, AND the incoming element
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273 // is not of the same type (e.g. <td>td1<td>td2</td>), we simply add this new one before it,
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274 // and most importantly, return back to here once this element is added,
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275 // e.g. <table><tr><td>td1</td><p>p1</p><td>td2</td></tr></table>
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276 else if ( currentName in nonBreakingBlocks && currentName != tagName )
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278 !element.returnPoint && ( element.returnPoint = currentNode );
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279 currentNode = currentNode.parent;
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283 // The current element is an inline element, which
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284 // need to be continued even after the close, so put
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285 // it in the pending list.
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286 if ( currentName in CKEDITOR.dtd.$inline )
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287 pendingInline.unshift( currentNode );
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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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298 element.isOrphan = 1;
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307 checkPending( tagName );
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310 element.parent = currentNode;
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312 if ( element.isEmpty )
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313 addElement( element );
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315 currentNode = element;
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318 parser.onTagClose = function( tagName )
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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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323 // If found, just remove it from the list.
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324 if ( tagName == pendingInline[ i ].name )
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326 pendingInline.splice( i, 1 );
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331 var pendingAdd = [],
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332 newPendingInline = [],
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333 candidate = currentNode;
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335 while ( candidate != fragment && candidate.name != tagName )
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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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340 if ( !candidate._.isBlockLike )
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341 newPendingInline.unshift( candidate );
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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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348 // Make sure return point is properly restored.
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349 candidate = candidate.returnPoint || candidate.parent;
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352 if ( candidate != fragment )
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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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357 var node = pendingAdd[ i ];
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358 addElement( node, node.parent );
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361 currentNode = candidate;
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363 if ( currentNode.name == 'pre' )
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366 if ( currentNode.name == 'textarea' )
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367 inTextarea = false;
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369 if ( candidate._.isBlockLike )
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372 addElement( candidate, candidate.parent );
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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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379 pendingInline = pendingInline.concat( newPendingInline );
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382 if ( tagName == 'body' )
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383 fixForBody = false;
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386 parser.onText = function( text )
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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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391 text = CKEDITOR.tools.ltrim( text );
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393 if ( text.length === 0 )
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401 && ( !currentNode.type || currentNode.name == 'body' )
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402 && CKEDITOR.tools.trim( text ) )
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404 this.onTagOpen( fixForBody, {}, 0, 1 );
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407 // Shrinking consequential spaces into one single for all elements
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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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412 currentNode.add( new CKEDITOR.htmlParser.text( text ) );
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415 parser.onCDATA = function( cdata )
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417 currentNode.add( new CKEDITOR.htmlParser.cdata( cdata ) );
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420 parser.onComment = function( comment )
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424 currentNode.add( new CKEDITOR.htmlParser.comment( comment ) );
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428 parser.parse( fragmentHtml );
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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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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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440 CKEDITOR.htmlParser.fragment.prototype =
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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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451 add : function( node, index )
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453 isNaN( index ) && ( index = this.children.length );
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455 var previous = index > 0 ? this.children[ index - 1 ] : null;
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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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462 previous.value = CKEDITOR.tools.rtrim( previous.value );
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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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467 // Remove it from the list and add the node again.
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468 this.children.pop();
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474 previous.next = node;
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477 node.previous = previous;
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478 node.parent = this;
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480 this.children.splice( index, 0, node );
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482 this._.hasInlineStarted = node.type == CKEDITOR.NODE_TEXT || ( node.type == CKEDITOR.NODE_ELEMENT && !node._.isBlockLike );
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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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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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494 writeHtml : function( writer, filter )
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496 var isChildrenFiltered;
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497 this.filterChildren = function()
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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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506 // Filtering the root fragment before anything else.
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507 !this.name && filter && filter.onFragment( this );
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509 this.writeChildrenHtml( writer, isChildrenFiltered ? null : filter );
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512 writeChildrenHtml : function( writer, filter )
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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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