aganzha/test.html

## test.html
<!DOCTYPE html>
<html>
	<head>
		<script type="text/javascript">
		/*
			This code is a IE8 (and below), polyfill for HTML5 Range object's startContainer,
			startOffset, endContainer and endOffset properties.
		*/
		(function () {
			function findTextNode(node, text) {
				//Iterate through all the child text nodes and check for matches
				//As we go through each text node keep removing the text value (substring) from the beginning of the text variable.
				do {
					if(node.nodeType==3) {//Text node
						var find = node.nodeValue;
						if (text.length > 0 && text.indexOf(find) === 0 && text !== find) { //text==find is a special case
							text = text.substring(find.length);
						} else {
							//cosole.log(node.nodeValue);
							return {node: node, offset: text.length}; //nodeInfo
						}
					} else if (node.nodeType === 1) {
						var range = document.body.createTextRange();
						range.moveToElementText(node);
						text = text.substring(range.text.length);
					}
				} while ((node=node.nextSibling));
				return null;
			}

			/**
			 * @param {Boolean} startOfSelection Set to true to find the startContainer and startOffset,
			 * else set to false (to find endContainer and endOffset).
			 */
			function getSelectionInfo(range, startOfSelection) {
				if(!range) return null;
				var rangeCopy = range.duplicate(), //Create two copies
					rangeObj = range.duplicate();

				rangeCopy.collapse(startOfSelection); //If true, go to beginning of the selection else go to the end.

				var parentElement = rangeCopy.parentElement();
				//If user clicks the input button without selecting text, then moveToElementText throws an error.
				if (parentElement instanceof HTMLInputElement) {
					return null;
				}
				//console.log(parentElement.nodeName); //Should return the parent.
				/* However IE8- cannot have the selection end at the zeroth index of
				 * the parentElement's first text node.
				 */
				rangeObj.moveToElementText(parentElement); //Select all text of parentElement
				rangeObj.setEndPoint('EndToEnd', rangeCopy); //Move end point to rangeCopy

				//rangeCopy.text gives you text from parentElement's first character upto rangeCopy.
				//Now traverse through sibling nodes to find the exact Node and the selection's offset.
				return findTextNode(parentElement.firstChild, rangeObj.text);
			}

			function getIERange() {
				var range=window.document.selection.createRange(), //Microsoft TextRange Object
					start = getSelectionInfo(range, true),
					end = getSelectionInfo(range, false);
				if (start && end) {
					return {
						commonAncestorContainer: range.parentElement(),
						startContainer: start.node,
						startOffset: start.offset,
						endContainer: end.node,
						endOffset: end.offset
					};
				}
				return null;
			}

			if (!window.getSelection && window.document.selection) { //IE8-
				window.getSelection = function () { //Gets the first range object
					var range = getIERange();
					return {
						rangeCount: range ? 1 : 0,
						getRangeAt: function () {
							return range;
						}
					};
				};
			}
		}());

		function onBtnClick() {
			var range=window.getSelection().getRangeAt(0);
			if (range) {
				console.log(range.startContainer.nodeValue.substr(range.startOffset));
				console.log(range.startOffset);
				console.log(range.endContainer.nodeValue.substr(0, range.endOffset));
				console.log(range.endOffset);
			}
		}
		</script>
	</head>
	<body>
		<h3>Select some text and click the button</h3>
		<pre>The quick brown fox <b>jumped</b> over the lazy dog</pre>
		<input type="button" value="console.log current selection info" onclick="onBtnClick();" /><br/>
		<br/>
		Clicking the button above will print out the following:<br/>
		<pre>console.log(range.startContainer.nodeValue.substr(range.startOffset));
console.log(range.startOffset);
console.log(range.endContainer.nodeValue.substr(0, range.endOffset));
console.log(range.endOffset);</pre>
	</body>
</html>
	<!DOCTYPE html>
	<html>
	<head>
	<script type="text/javascript">
	/*
	This code is a IE8 (and below), polyfill for HTML5 Range object's startContainer,
	startOffset, endContainer and endOffset properties.
	*/
	(function () {
	function findTextNode(node, text) {
	//Iterate through all the child text nodes and check for matches
	//As we go through each text node keep removing the text value (substring) from the beginning of the text variable.
	do {
	if(node.nodeType==3) {//Text node
	var find = node.nodeValue;
	if (text.length > 0 && text.indexOf(find) === 0 && text !== find) { //text==find is a special case
	text = text.substring(find.length);
	} else {
	//cosole.log(node.nodeValue);
	return {node: node, offset: text.length}; //nodeInfo
	}
	} else if (node.nodeType === 1) {
	var range = document.body.createTextRange();
	range.moveToElementText(node);
	text = text.substring(range.text.length);
	}
	} while ((node=node.nextSibling));
	return null;
	}

	/**
	* @param {Boolean} startOfSelection Set to true to find the startContainer and startOffset,
	* else set to false (to find endContainer and endOffset).
	*/
	function getSelectionInfo(range, startOfSelection) {
	if(!range) return null;
	var rangeCopy = range.duplicate(), //Create two copies
	rangeObj = range.duplicate();

	rangeCopy.collapse(startOfSelection); //If true, go to beginning of the selection else go to the end.

	var parentElement = rangeCopy.parentElement();
	//If user clicks the input button without selecting text, then moveToElementText throws an error.
	if (parentElement instanceof HTMLInputElement) {
	return null;
	}
	//console.log(parentElement.nodeName); //Should return the parent.
	/* However IE8- cannot have the selection end at the zeroth index of
	* the parentElement's first text node.
	*/
	rangeObj.moveToElementText(parentElement); //Select all text of parentElement
	rangeObj.setEndPoint('EndToEnd', rangeCopy); //Move end point to rangeCopy

	//rangeCopy.text gives you text from parentElement's first character upto rangeCopy.
	//Now traverse through sibling nodes to find the exact Node and the selection's offset.
	return findTextNode(parentElement.firstChild, rangeObj.text);
	}

	function getIERange() {
	var range=window.document.selection.createRange(), //Microsoft TextRange Object
	start = getSelectionInfo(range, true),
	end = getSelectionInfo(range, false);
	if (start && end) {
	return {
	commonAncestorContainer: range.parentElement(),
	startContainer: start.node,
	startOffset: start.offset,
	endContainer: end.node,
	endOffset: end.offset
	};
	}
	return null;
	}

	if (!window.getSelection && window.document.selection) { //IE8-
	window.getSelection = function () { //Gets the first range object
	var range = getIERange();
	return {
	rangeCount: range ? 1 : 0,
	getRangeAt: function () {
	return range;
	}
	};
	};
	}
	}());

	function onBtnClick() {
	var range=window.getSelection().getRangeAt(0);
	if (range) {
	console.log(range.startContainer.nodeValue.substr(range.startOffset));
	console.log(range.startOffset);
	console.log(range.endContainer.nodeValue.substr(0, range.endOffset));
	console.log(range.endOffset);
	}
	}
	</script>
	</head>
	<body>
	<h3>Select some text and click the button</h3>
	<pre>The quick brown fox <b>jumped</b> over the lazy dog</pre>
	<input type="button" value="console.log current selection info" onclick="onBtnClick();" /><br/>
	<br/>
	Clicking the button above will print out the following:<br/>
	<pre>console.log(range.startContainer.nodeValue.substr(range.startOffset));
	console.log(range.startOffset);
	console.log(range.endContainer.nodeValue.substr(0, range.endOffset));
	console.log(range.endOffset);</pre>
	</body>
	</html>