--- /dev/null
+/**
+ * SearchHighlight plugin for jQuery
+ *
+ * Thanks to Scott Yang <http://scott.yang.id.au/>
+ * for the original idea and some code
+ *
+ * @author Renato Formato <rformato@gmail.com>
+ *
+ * @version 0.37 (9/1/2009)
+ *
+ * Options
+ * - exact (string, default:"exact")
+ * "exact" : find and highlight the exact words.
+ * "whole" : find partial matches but highlight whole words
+ * "partial": find and highlight partial matches
+ *
+ * - style_name (string, default:'hilite')
+ * The class given to the span wrapping the matched words.
+ *
+ * - style_name_suffix (boolean, default:true)
+ * If true a different number is added to style_name for every different matched word.
+ *
+ * - debug_referrer (string, default:null)
+ * Set a referrer for debugging purpose.
+ *
+ * - engines (array of regex, default:null)
+ * Add a new search engine regex to highlight searches coming from new search engines.
+ * The first element is the regex to match the domain.
+ * The second element is the regex to match the query string.
+ * Ex: [/^http:\/\/my\.site\.net/i,/search=([^&]+)/i]
+ *
+ * - highlight (string, default:null)
+ * A jQuery selector or object to set the elements enabled for highlight.
+ * If null or no elements are found, all the document is enabled for highlight.
+ *
+ * - nohighlight (string, default:null)
+ * A jQuery selector or object to set the elements not enabled for highlight.
+ * This option has priority on highlight.
+ *
+ * - keys (string, default:null)
+ * Disable the analisys of the referrer and search for the words given as argument
+ *
+ * - min_length (number, default:null)
+ * Set the minimun length of a key
+ *
+ */
+
+if (window.jQuery)
+(function($){
+ jQuery.fn.SearchHighlight = function(options) {
+ var ref = options.debug_referrer || document.referrer;
+ if(!ref && options.keys==undefined) return this;
+
+ SearchHighlight.options = $.extend({exact:"exact",style_name:'hilite',style_name_suffix:true},options);
+
+ if(options.engines) SearchHighlight.engines.unshift(options.engines);
+ var q = SearchHighlight.splitKeywords(options.keys!=undefined?options.keys.toLowerCase():SearchHighlight.decodeURL(ref,SearchHighlight.engines));
+ if(q && q.join("")) {
+ SearchHighlight.buildReplaceTools(q);
+ if(!SearchHighlight.regex) return this;
+ return this.each(function(){
+ var el = this;
+ if(el==document) el = $("body")[0];
+ SearchHighlight.hiliteElement(el);
+ })
+ } else return this;
+ };
+
+ var SearchHighlight = {
+ options: {},
+ regex: null,
+ engines: [
+ [/^http:\/\/(www\.)?google\./i, /q=([^&]+)/i], // Google
+ [/^http:\/\/(www\.)?search\.yahoo\./i, /p=([^&]+)/i], // Yahoo
+ [/^http:\/\/(www\.)?search\.msn\./i, /q=([^&]+)/i], // MSN
+ [/^http:\/\/(www\.)?search\.live\./i, /query=([^&]+)/i], // MSN Live
+ [/^http:\/\/(www\.)?search\.aol\./i, /userQuery=([^&]+)/i], // AOL
+ [/^http:\/\/(www\.)?ask\.com/i, /q=([^&]+)/i], // Ask.com
+ [/^http:\/\/(www\.)?altavista\./i, /q=([^&]+)/i], // AltaVista
+ [/^http:\/\/(www\.)?feedster\./i, /q=([^&]+)/i], // Feedster
+ [/^http:\/\/(www\.)?search\.lycos\./i, /q=([^&]+)/i], // Lycos
+ [/^http:\/\/(www\.)?alltheweb\./i, /q=([^&]+)/i], // AllTheWeb
+ [/^http:\/\/(www\.)?technorati\.com/i, /([^\?\/]+)(?:\?.*)$/i] // Technorati
+ ],
+ subs: {},
+ decodeURL: function(URL,reg) {
+ //try to properly escape not UTF-8 URI encoded chars
+ try {
+ URL = decodeURIComponent(URL);
+ } catch (e) {
+ URL = unescape(URL);
+ }
+ var query = null;
+ $.each(reg,function(i,n){
+ if(n[0].test(URL)) {
+ var match = URL.match(n[1]);
+ if(match) {
+ query = match[1].toLowerCase();
+ return false;
+ }
+ }
+ });
+
+ return query;
+ },
+ splitKeywords: function(query) {
+ if(query) {
+ //do not split keywords enclosed by "
+ var m = query.match(/"([^"]*)"/g);
+ if(m)
+ for(var i=0, ml=m.length;i<ml;i++) {
+ var regex = new RegExp(m[i]);
+ query = query.replace(regex,'@@@'+i+'@@@');
+ }
+ query = query.split(/[\s,\+]+/);
+ if(m)
+ for(var i=0,l = query.length;i<l;i++) {
+ for(var j=0, ml=m.length;j<ml;j++) {
+ var regex = new RegExp("@@@"+j+"@@@");
+ query[i] = query[i].replace(regex,m[j].substring(1,m[j].length-1))
+ }
+ }
+ };
+ return query;
+ },
+
+ regexAccent : [
+ [/[\xC0-\xC5\u0100-\u0105]/ig,'a'],
+ [/[\xC7\u0106-\u010D]/ig,'c'],
+ [/[\xC8-\xCB]/ig,'e'],
+ [/[\xCC-\xCF]/ig,'i'],
+ [/[\u0141]/ig,'l'],
+ [/\xD1/ig,'n'],
+ [/[\xD2-\xD6\xD8]/ig,'o'],
+ [/[\u015A-\u0161]/ig,'s'],
+ [/[\u0162-\u0167]/ig,'t'],
+ [/[\xD9-\xDC]/ig,'u'],
+ [/\xFF/ig,'y'],
+ [/[\x91\x92\u2018\u2019]/ig,'\'']
+ ],
+ matchAccent : /[\x91\x92\xC0-\xC5\xC7-\xCF\xD1-\xD6\xD8-\xDC\xFF\u0100-\u010D\u0141\u015A-\u0167\u2018\u2019]/ig,
+ replaceAccent: function(q) {
+ SearchHighlight.matchAccent.lastIndex = 0;
+ if(SearchHighlight.matchAccent.test(q)) {
+ for(var i=0,l=SearchHighlight.regexAccent.length;i<l;i++)
+ q = q.replace(SearchHighlight.regexAccent[i][0],SearchHighlight.regexAccent[i][1]);
+ }
+ return q;
+ },
+ escapeRegEx : /((?:\\{2})*)([[\]{}*?|])/g, //the special chars . and + are already gone at this point because they are considered split chars
+ buildReplaceTools : function(query) {
+ var re = [], regex;
+ $.each(query,function(i,n){
+ if(!SearchHighlight.options.min_length || n.length>=SearchHighlight.options.min_length)
+ if(n = SearchHighlight.replaceAccent(n).replace(SearchHighlight.escapeRegEx,"$1\\$2"))
+ re.push(n);
+ });
+
+ if(!re.length) return;
+ regex = re.join("|");
+ switch(SearchHighlight.options.exact) {
+ case "exact":
+ regex = '\\b(?:'+regex+')\\b';
+ break;
+ case "whole":
+ regex = '\\b\\w*('+regex+')\\w*\\b';
+ break;
+ }
+ SearchHighlight.regex = new RegExp(regex, "gi");
+
+ $.each(re,function(i,n){
+ SearchHighlight.subs[n] = SearchHighlight.options.style_name+
+ (SearchHighlight.options.style_name_suffix?i+1:'');
+ });
+ },
+ nosearch: /s(?:cript|tyle)|textarea/i,
+ hiliteElement: function(el) {
+ var opt = SearchHighlight.options, elHighlight, noHighlight;
+ elHighlight = opt.highlight?$(opt.highlight):$("body");
+ if(!elHighlight.length) elHighlight = $("body");
+ noHighlight = opt.nohighlight?$(opt.nohighlight):$([]);
+
+ elHighlight.each(function(){
+ SearchHighlight.hiliteTree(this,noHighlight);
+ });
+ },
+ hiliteTree : function(el,noHighlight) {
+ if(noHighlight.index(el)!=-1) return;
+ var matchIndex = SearchHighlight.options.exact=="whole"?1:0;
+ for(var startIndex=0,endIndex=el.childNodes.length;startIndex<endIndex;startIndex++) {
+ var item = el.childNodes[startIndex];
+ if ( item.nodeType != 8 ) {//comment node
+ //text node
+ if(item.nodeType==3) {
+ var text = item.data, textNoAcc = SearchHighlight.replaceAccent(text);
+ var newtext="",match,index=0;
+ SearchHighlight.regex.lastIndex = 0;
+ while(match = SearchHighlight.regex.exec(textNoAcc)) {
+ newtext += SearchHighlight.fixTags(text.substr(index,match.index-index))+'<span class="'+
+ SearchHighlight.subs[match[matchIndex].toLowerCase()]+'">'+SearchHighlight.fixTags(text.substr(match.index,match[0].length))+"</span>";
+ index = match.index+match[0].length;
+ }
+ if(newtext) {
+ //add the last part of the text
+ newtext += SearchHighlight.fixTags(text.substring(index));
+ var repl = $.merge([],$("<span>"+newtext+"</span>")[0].childNodes);
+ endIndex += repl.length-1;
+ startIndex += repl.length-1;
+ $(item).before(repl).remove();
+ }
+ } else {
+ if(item.nodeType==1 && item.nodeName.search(SearchHighlight.nosearch)==-1)
+ SearchHighlight.hiliteTree(item,noHighlight);
+ }
+ }
+ }
+ },
+ fixTags : function(text) {
+ return text.replace("<","<").replace(">",">");
+ }
+ };
+})(jQuery)
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