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<div class="content" data-ice="content"><h1 data-ice="title">src/modules/highlightKeywords.js</h1>
<pre class="source-code line-number"><code class="prettyprint linenums" data-ice="content">import Dom from &apos;../dom&apos;;
import Str from &apos;../string&apos;;
export class HighlightKeyword{
/**
* HighlightKeyword, highlight matched keyword
* @param {Object} tf TableFilter instance
*/
constructor(tf) {
var f = tf.config();
//defines css class for highlighting
this.highlightCssClass = f.highlight_css_class || &apos;keyword&apos;;
this.highlightedNodes = [];
this.tf = tf;
}
/**
* highlight occurences of searched term in passed node
* @param {Node} node
* @param {String} word Searched term
* @param {String} cssClass Css class name
*/
highlight(node, word, cssClass){
// Iterate into this nodes childNodes
if(node.hasChildNodes){
var children = node.childNodes;
for(var i=0; i&lt;children.length; i++){
this.highlight(children[i], word, cssClass);
}
}
if(node.nodeType === 3){
var tempNodeVal = Str.lower(node.nodeValue);
var tempWordVal = Str.lower(word);
if(tempNodeVal.indexOf(tempWordVal) != -1){
var pn = node.parentNode;
if(pn &amp;&amp; pn.className != cssClass){
// word not highlighted yet
var nv = node.nodeValue,
ni = tempNodeVal.indexOf(tempWordVal),
// Create a load of replacement nodes
before = Dom.text(nv.substr(0, ni)),
docWordVal = nv.substr(ni,word.length),
after = Dom.text(nv.substr(ni+word.length)),
hiwordtext = Dom.text(docWordVal),
hiword = Dom.create(&apos;span&apos;);
hiword.className = cssClass;
hiword.appendChild(hiwordtext);
pn.insertBefore(before,node);
pn.insertBefore(hiword,node);
pn.insertBefore(after,node);
pn.removeChild(node);
this.highlightedNodes.push(hiword.firstChild);
}
}
}
}
/**
* Removes highlight to nodes matching passed string
* @param {String} word
* @param {String} cssClass Css class to remove
*/
unhighlight(word, cssClass){
var arrRemove = [];
var highlightedNodes = this.highlightedNodes;
for(var i=0; i&lt;highlightedNodes.length; i++){
var n = highlightedNodes[i];
if(!n){
continue;
}
var tempNodeVal = Str.lower(n.nodeValue),
tempWordVal = Str.lower(word);
if(tempNodeVal.indexOf(tempWordVal) !== -1){
var pn = n.parentNode;
if(pn &amp;&amp; pn.className === cssClass){
var prevSib = pn.previousSibling,
nextSib = pn.nextSibling;
if(!prevSib || !nextSib){ continue; }
nextSib.nodeValue = prevSib.nodeValue + n.nodeValue +
nextSib.nodeValue;
prevSib.nodeValue = &apos;&apos;;
n.nodeValue = &apos;&apos;;
arrRemove.push(i);
}
}
}
for(var k=0; k&lt;arrRemove.length; k++){
highlightedNodes.splice(arrRemove[k], 1);
}
}
/**
* Clear all occurrences of highlighted nodes
*/
unhighlightAll(){
if(!this.tf.highlightKeywords || !this.tf.searchArgs){
return;
}
for(var y=0; y&lt;this.tf.searchArgs.length; y++){
this.unhighlight(
this.tf.searchArgs[y], this.highlightCssClass);
}
this.highlightedNodes = [];
}
}</code></pre>
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