- function doHighlight(bodyText, searchTerm)
- {
- if ((!highlightStartTag) || (!highlightEndTag)) {
- highlightStartTag = "<font style='color:black; background-color:yellow;'>";
- highlightEndTag = "</font>";
- }
- var newText = "";
- var i = -1;
- var lcSearchTerm = searchTerm.toLowerCase();
- var lcBodyText = bodyText.toLowerCase();
- while (bodyText.length > 0) {
- i = lcBodyText.indexOf(lcSearchTerm, i+1);
- if (i < 0) {
- newText += bodyText;
- bodyText = "";
- } else {
- if (bodyText.lastIndexOf(">", i) >= bodyText.lastIndexOf("<", i)) {
- if (lcBodyText.lastIndexOf("/script>", i) >= lcBodyText.lastIndexOf("<script", i)) {
- newText += bodyText.substring(0, i) + highlightStartTag + bodyText.substr(i, searchTerm.length) + highlightEndTag;
- bodyText = bodyText.substr(i + searchTerm.length);
- lcBodyText = bodyText.toLowerCase();
- i = -1;
- }
- }
- }
- }
- return newText;
- }
- function highlightSearchTerms(searchText, treatAsPhrase, warnOnFailure, highlightStartTag, highlightEndTag)
- {
- if (treatAsPhrase) {
- searchArray = [searchText];
- } else {
- searchArray = searchText.split(" ");
- }
- if (!document.body || typeof(document.body.innerHTML) == "undefined") {
- if (warnOnFailure) {
- alert("Palavra indisponível."");
- }
- return false;
- }
- var bodyText = document.body.innerHTML;
- for (var i = 0; i < searchArray.length; i++) {
- bodyText = doHighlight(bodyText, searchArray[i], highlightStartTag, highlightEndTag);
- }
- document.body.innerHTML = bodyText;
- return true;
- }
- function searchPrompt(defaultText, treatAsPhrase, textColor, bgColor)
- {
- if (!defaultText) {
- defaultText = ";
- }
- if ((!textColor) || (!bgColor)) {
- highlightStartTag = "";
- highlightEndTag = "";
- } else {
- highlightStartTag = ""<font style='color:" + textColor + "; background-color:" + bgColor + ";'>";
- highlightEndTag = "</font>";
- }
- if (treatAsPhrase) {
- promptText = "Digite os termos que deseja destacar:";
- return false;
- } else {
- promptText = "Digite os termos que deseja destacar:";
- }
- searchText = prompt(promptText, defaultText);
- if (!searchText) {
- alert("Nenhum termo foi solicitado.");
- return false;
- }
- return highlightSearchTerms(searchText, treatAsPhrase, true, highlightStartTag, highlightEndTag);
- }
- function highlightGoogleSearchTerms(referrer)
- {
- if (!referrer) {
- return false;
- }
- var queryPrefix = "q=";
- var startPos = referrer.toLowerCase().indexOf(queryPrefix);
- if ((startPos < 0) || (startPos + queryPrefix.length == referrer.length)) {
- return false;
- }
- var endPos = referrer.indexOf("&", startPos);
- if (endPos < 0) {
- endPos = referrer.length;
- }
- var queryString = referrer.substring(startPos + queryPrefix.length, endPos);
- queryString = queryString.replace(%20/gi,, " ");
- queryString = queryString.replace(\+/gi,, " ");
- queryString = queryString.replace(%22/gi,, ");
- queryString = queryString.replace(/\\/gi, "");
- return highlightSearchTerms(queryString, false);
- }
- function testHighlightGoogleSearchTerms()
- {
- var referrerString = ""http//www.google.com/search?q=javascript%20highlight&start=0";
- referrerString = prompt("Test the following referrer string:", referrerString);
- return highlightGoogleSearchTerms(referrerString);