WebContent/admin/kindeditor/src/range.js

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var _START_TO_START = 0,
	_START_TO_END = 1,
	_END_TO_END = 2,
	_END_TO_START = 3,
	_BOOKMARK_ID = 0;

function _updateCollapsed(range) {
	range.collapsed = (range.startContainer === range.endContainer && range.startOffset === range.endOffset);
	return range;
}
/**
	cloneContents: _copyAndDelete(this, true, false)
	extractContents: _copyAndDelete(this, true, true)
	deleteContents: _copyAndDelete(this, false, true)
*/
function _copyAndDelete(range, isCopy, isDelete) {
	var doc = range.doc, nodeList = [];
	//split a textNode
	function splitTextNode(node, startOffset, endOffset) {
		var length = node.nodeValue.length, centerNode;
		if (isCopy) {
			var cloneNode = node.cloneNode(true);
			if (startOffset > 0) {
				centerNode = cloneNode.splitText(startOffset);
			} else {
				centerNode = cloneNode;
			}
			if (endOffset < length) {
				centerNode.splitText(endOffset - startOffset);
			}
		}
		if (isDelete) {
			var center = node;
			if (startOffset > 0) {
				center = node.splitText(startOffset);
				range.setStart(node, startOffset);
			}
			if (endOffset < length) {
				var right = center.splitText(endOffset - startOffset);
				range.setEnd(right, 0);
			}
			nodeList.push(center);
		}
		return centerNode;
	}
	function removeNodes() {
		if (isDelete) {
			range.up().collapse(true);
		}
		for (var i = 0, len = nodeList.length; i < len; i++) {
			var node = nodeList[i];
			if (node.parentNode) {
				node.parentNode.removeChild(node);
			}
		}
	}

	var copyRange = range.cloneRange().down();