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Wrap RegEx matches in a string with html tags (or anything)
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| var TagAdder = (function(regExp, openTag, closeTag) { | |
| var regExp = regExp || /(?:)/gi; | |
| var openTag = openTag || '<span class="highlighted">'; | |
| var closeTag = closeTag || '</span>'; | |
| function spliceSlice(str, index, count, add) { | |
| return str.slice(0, index) + (add || "") + str.slice(index + count); | |
| } | |
| return { | |
| setRegExp: function(newRegExp) { | |
| regExp = newRegExp; | |
| return regExp; | |
| }, | |
| createString: function(text) { | |
| var match, matches = []; | |
| var numMatches = text.match(regExp).length; | |
| // put all match objects into array | |
| // a match has the form [0: matchText, index: indexOfMatch, input: fullText] | |
| while (numMatches--) { | |
| match = regExp.exec(text) | |
| // only add if the matched text has a nonzero length | |
| if (match[0].length) { | |
| matches.push(match); | |
| } | |
| } | |
| // the sum of the character lengths of openTag and closeTag | |
| var tagsLength = openTag.length + closeTag.length; | |
| matches.forEach(function(m, i) { | |
| // split text into an array of characters so Array.splice() can be used | |
| var workingText = text; | |
| var openIndex = m.index + i*tagsLength; | |
| var closeIndex = openIndex + m[0].length + openTag.length; | |
| // insert tags at calculated indicies | |
| var workingText = spliceSlice(workingText, openIndex, 0, openTag); | |
| var workingText = spliceSlice(workingText, closeIndex, 0, closeTag); | |
| // update text string | |
| text = workingText; | |
| }); | |
| return text; | |
| }, | |
| } | |
| }); |
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