WebContent/kindeditor/src/selector.js

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function _contains(nodeA, nodeB) {
	// Bypass comparison on document node since
	// we don't deal with cross frame,
	// e.g. document.body.parentNode.parentNode == document (false for IE).
	if (nodeA.nodeType == 9 && nodeB.nodeType != 9) {
		return true;
	}
	while ((nodeB = nodeB.parentNode)) {
		if (nodeB == nodeA) {
			return true;
		}
	}
	return false;
}

var _getSetAttrDiv = document.createElement('div');
_getSetAttrDiv.setAttribute('className', 't');
var _GET_SET_ATTRIBUTE = _getSetAttrDiv.className !== 't';

function _getAttr(el, key) {
	key = key.toLowerCase();
	var val = null;
	// IE6,IE7,IE=EmulateIE7
	if (!_GET_SET_ATTRIBUTE && el.nodeName.toLowerCase() != 'script') {
		var div = el.ownerDocument.createElement('div');
		div.appendChild(el.cloneNode(false));
		var list = _getAttrList(_unescape(div.innerHTML));
		if (key in list) {
			val = list[key];
		}
	} else {
		// IE8设置<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />，抛出异常
		try {
			val = el.getAttribute(key, 2);
		} catch(e) {
			val = el.getAttribute(key, 1);
		}
	}
	if (key === 'style' && val !== null) {
		val = _formatCss(val);
	}
	return val;
}

function _queryAll(expr, root) {
	var exprList = expr.split(',');
	if (exprList.length > 1) {
		var mergedResults = [];
		_each(exprList, function() {
			_each(_queryAll(this, root), function() {
				if (_inArray(this, mergedResults) < 0) {
					mergedResults.push(this);
				}
			});
		});
		return mergedResults;
	}
	root = root || document;
	function escape(str) {