git ssb

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(function (global) {
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function addAccents(str) {
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	// http://www.the-art-of-web.com/javascript/search-highlight/
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	return str
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		// .replace(/([ao])e/ig, "$1")
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		.replace(/e/ig, "[eèéêë]")
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		.replace(/a/ig, "([aàâä]|ae)")
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		.replace(/i/ig, "[iîï]")
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		.replace(/o/ig, "([oôö]|oe)")
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		.replace(/u/ig, "[uùûü]")
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		.replace(/y/ig, "[yÿ]");
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}
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function setSelection(startNode, startOffset, endNode, endOffset) {
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	var range = document.createRange();
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	range.setStart(startNode, startOffset);
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	range.setEnd(endNode, endOffset);
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	var sel = window.getSelection();
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	sel.removeAllRanges();
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	sel.addRange(range);
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}
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function TextNodeSearcher(container) {
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	this.container = container;
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}
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TextNodeSearcher.prototype.setQuery = function (str) {
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	if (str == this.queryStr)
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		return;
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	this.queryStr = str;
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	this.query = new RegExp(addAccents(str), "ig");
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};
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function shouldDescendInto(node) {
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	return node.nodeName != "SCRIPT" && node.nodeName != "STYLE";
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}
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function getNextTextNode(node, container, wrap) {
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	outer: do {
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		if (shouldDescendInto(node) && node.firstChild) {
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			node = node.firstChild;
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		} else if (node.nextSibling) {
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			node = node.nextSibling;
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		} else {
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			do {
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				if (node == container) {
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					if (!wrap)
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						return null;
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					wrap = false;
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					continue outer;
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				}
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				node = node.parentNode;
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			} while (!node.nextSibling);
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			node = node.nextSibling;
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		}
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	} while (node.nodeType != Node.TEXT_NODE);
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	return node;
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}
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function getPreviousTextNode(node, container, wrap) {
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	do {
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		if (node == container) {
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			if (!wrap)
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				return null;
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			while (shouldDescendInto(node) && node.lastChild)
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				node = node.lastChild;
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			wrap = false;
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		} else if (node.previousSibling) {
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			node = node.previousSibling;
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			while (shouldDescendInto(node) && node.lastChild)
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				node = node.lastChild;
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		} else {
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			node = node.parentNode;
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		}
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	} while (node.nodeType != Node.TEXT_NODE);
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	return node;
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}
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function matchLast(re, str) {
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	var last;
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	re.lastIndex = 0;
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	for (var m = re.exec(str); m; m = re.exec(str))
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		last = m;
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	return last;
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}
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TextNodeSearcher.prototype.selectNext = function () {
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	if (!this.queryStr)
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		return;
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	var sel = window.getSelection();
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	var startNode = sel.focusNode;
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	var startOffset = 0;
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	if (!startNode || startNode.nodeType != Node.TEXT_NODE ||
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			!this.container.contains(startNode))
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		startNode = getNextTextNode(startNode, this.container, true);
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	else
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		startOffset = sel.focusOffset;
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	for (var node = startNode; node;
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			node = getNextTextNode(node, this.container, true)) {
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		var str = node.data;
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		this.query.lastIndex = startOffset;
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		if (startOffset)
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			startOffset = 0;
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		var m = this.query.exec(str);
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		if (m) {
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			setSelection(node, m.index, node, m.index + m[0].length);
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			return;
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		}
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	}
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};
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TextNodeSearcher.prototype.selectPrevious = function () {
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	if (!this.queryStr)
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		return;
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	var sel = window.getSelection();
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	var endNode = sel.anchorNode;
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	var endOffset = 0;
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	if (!endNode || endNode.nodeType != Node.TEXT_NODE ||
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			!this.container.contains(endNode))
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		endNode = getPreviousTextNode(endNode, this.container, true);
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	else
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		endOffset = sel.anchorOffset;
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	for (var node = endNode; node;
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			node = getPreviousTextNode(node, this.container, true)) {
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		var str = node.data;
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		if (endOffset < Infinity) {
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			str = node.data.substr(0, endOffset);
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			endOffset = Infinity;
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		}
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		var m = matchLast(this.query, str);
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		if (m) {
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			setSelection(node, m.index, node, m.index + m[0].length);
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			return;
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		}
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	}
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};
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if (global.module)
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	module.exports = TextNodeSearcher;
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else
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	global.TextNodeSearcher = TextNodeSearcher;
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}(this));
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