Created
January 28, 2014 10:59
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<!DOCTYPE html> | |
<html> | |
<head> | |
<title>abc abcd</title> | |
<script> | |
function ReplaceNode(textNode, eNode) { | |
textNode.parentNode.replaceChild(textNode, eNode); | |
} | |
function DecorateText(node, match, offset) { | |
var e = document.createElement("span"); | |
e.style.color = "#ff0000"; | |
//e.textContent = match; | |
e.appendChild(document.createTextNode(match)); | |
return e; | |
} | |
function replaceText(textElement, postion, length, element) { | |
if (textElement.nodeType == 3) { | |
var text = textElement.nodeValue; | |
if (postion < 0 || (postion + length) > text.length || length < 0) { | |
return false; | |
} | |
var fragment = document.createDocumentFragment(); | |
if (postion > 0) { | |
fragment.appendChild(document.createTextNode(text.substr(0, postion))); | |
} | |
fragment.appendChild(element); | |
if ((postion + length + 1) < text.length) { | |
fragment.appendChild(document.createTextNode(text.substr(postion + length + 1))); | |
} | |
textElement.parent.replaceChild(fragment, textElement); | |
return fragment; | |
} | |
return false; | |
} | |
function replaceText2(textElement, postion, length, element) { | |
if (textElement.nodeType == 3) { | |
var text = textElement.nodeValue; | |
if (postion < 0 || (postion + length) > text.length || length < 0) { | |
return false; | |
} | |
var newTextNode = textElement.splitText(postion); | |
newTextNode.data = newTextNode.data.substr(length); | |
textElement.parentNode.insertBefore(element, textElement.nextSibling); | |
return newTextNode; | |
} | |
return false; | |
} | |
var matchText = function (node, regex, decorator, excludeElements) { | |
excludeElements || (excludeElements = ['script', 'style', 'iframe', 'canvas', 'head']); | |
var child = node.firstChild; | |
do { | |
switch (child.nodeType) { | |
case 1: | |
if (excludeElements.indexOf(child.tagName.toLowerCase()) > -1) { | |
continue; | |
} | |
matchText(child, regex, decorator, excludeElements); | |
break; | |
case 3: | |
if (regex.test(child.data)) { | |
var globalOffset = 0; | |
child.data.replace(regex, function (all) { | |
var offset = arguments[arguments.length - 2] + globalOffset; | |
child = replaceText2(child, offset, all.length, decorator(child, all, offset)); | |
globalOffset -= (offset + all.length); | |
}); | |
} | |
break; | |
} | |
} | |
while (child = child.nextSibling); | |
return node; | |
}; | |
function init() { | |
matchText(document, new RegExp("\\b" + 'abc' + "\\b", "g"), DecorateText); | |
} | |
</script> | |
</head> | |
<body onload="init()"> | |
<p>1 abc abcd abc 123 abc</p> | |
<div> | |
2 abc abcd abc 123 | |
<div>3 abc abcd abc 123</div> | |
</div> | |
</body> | |
</html> |
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