97 lines
3.1 KiB
JavaScript
97 lines
3.1 KiB
JavaScript
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/*******************************************************************************
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* Copyright (c) 2000, 2004 IBM Corporation and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Common Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/cpl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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var isSafari = navigator.userAgent.indexOf('Safari/') != -1;
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var highlighted=false;
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var startTime;
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var MAX_DURATION=3000;
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onload=highlight;
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document.onreadystatechange=highlight;
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function highlight(){
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if(highlighted){
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return;
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}
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highlighted=true;
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if (!document.body) return;
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if(document.body.innerHTML.length < 50000){
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for(i=0; i<keywords.length; i++){
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word=keywords[i].toLowerCase();
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highlightWordInNode(word, document.body);
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}
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}else{
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startTime=new Date().getTime();
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for(i=0; i<keywords.length; i++){
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word=keywords[i].toLowerCase();
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highlightWordInNodeTimed(word, document.body);
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if(new Date().getTime()>startTime+MAX_DURATION) return;
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}
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}
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}
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function highlightWordInNode(aWord, aNode){
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if (aNode.nodeType == 1){
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var children = aNode.childNodes;
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for(var i=0; i < children.length; i++) {
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highlightWordInNode(aWord, children[i]);
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}
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}
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else if(aNode.nodeType==3){
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highlightWordInText(aWord, aNode);
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}
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}
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function highlightWordInNodeTimed(aWord, aNode){
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if (aNode.nodeType == 1){
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var children = aNode.childNodes;
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for(var i=0; i < children.length; i++) {
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highlightWordInNodeTimed(aWord, children[i]);
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if(new Date().getTime()>startTime+MAX_DURATION) return;
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}
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}
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else if(aNode.nodeType==3){
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highlightWordInText(aWord, aNode);
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}
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}
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function highlightWordInText(aWord, textNode){
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allText=new String(textNode.data);
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allTextLowerCase=allText.toLowerCase();
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index=allTextLowerCase.indexOf(aWord);
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if(index>=0){
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// create a node to replace the textNode so we end up
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// not changing number of children of textNode.parent
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replacementNode=document.createElement("span");
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textNode.parentNode.insertBefore(replacementNode, textNode);
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while(index>=0){
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before=allText.substring(0,index);
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newBefore=document.createTextNode(before);
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replacementNode.appendChild(newBefore);
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spanNode=document.createElement("span");
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if(isSafari){
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spanNode.style.color="#000000";
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spanNode.style.background="#B5D5FF";
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}else{
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spanNode.style.background="Highlight";
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spanNode.style.color="HighlightText";
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}
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replacementNode.appendChild(spanNode);
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boldText=document.createTextNode(allText.substring(index,index+aWord.length));
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spanNode.appendChild(boldText);
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allText=allText.substring(index+aWord.length);
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allTextLowerCase=allText.toLowerCase();
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index=allTextLowerCase.indexOf(aWord);
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}
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newAfter=document.createTextNode(allText);
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replacementNode.appendChild(newAfter);
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textNode.parentNode.removeChild(textNode);
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}
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}
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