videoif/itemfile/js/formatXml.js

String.prototype.removeLineEnd = function()
{
	return this.replace(/(<.+?\s+?)(?:\n\s*?(.+?=".*?"))/g,'$1 $2')
}
function formatXml(text)
{
	//去掉多余的空格
	text = '\n' + text.replace(/(<\w+)(\s.*?>)/g,function($0, name, props)
	{
		return name + ' ' + props.replace(/\s+(\w+=)/g," $1");
	}).replace(/>\s*?</g,">\n<");
	
	//把注释编码
	text = text.replace(/\n/g,'\r').replace(/<!--(.+?)-->/g,function($0, text)
	{
		var ret = '<!--' + escape(text) + '-->';
		//alert(ret);
		return ret;
	}).replace(/\r/g,'\n');
	
	//调整格式
	var rgx = /\n(<(([^\?]).+?)(?:\s|\s*?>|\s*?(\/)>)(?:.*?(?:(?:(\/)>)|(?:<(\/)\2>)))?)/mg;
	var nodeStack = [];
	var output = text.replace(rgx,function($0,all,name,isBegin,isCloseFull1,isCloseFull2 ,isFull1,isFull2){
		var isClosed = (isCloseFull1 == '/') || (isCloseFull2 == '/' ) || (isFull1 == '/') || (isFull2 == '/');
		//alert([all,isClosed].join('='));
		var prefix = '';
		if(isBegin == '!')
		{
			prefix = getPrefix(nodeStack.length);
		}
		else 
		{
			if(isBegin != '/')
			{
				prefix = getPrefix(nodeStack.length);
				if(!isClosed)
				{
					nodeStack.push(name);
				}
			}
			else
			{
				nodeStack.pop();
				prefix = getPrefix(nodeStack.length);
			}

		
		}
			var ret =  '\n' + prefix + all;
			return ret;
	});
	
	var prefixSpace = -1;
	var outputText = output.substring(1);
	//alert(outputText);
	
	//把注释还原并解码，调格式
	outputText = outputText.replace(/\n/g,'\r').replace(/(\s*)<!--(.+?)-->/g,function($0, prefix,  text)
	{
		//alert(['[',prefix,']=',prefix.length].join(''));
		if(prefix.charAt(0) == '\r')
			prefix = prefix.substring(1);
		text = unescape(text).replace(/\r/g,'\n');
		var ret = '\n' + prefix + '<!--' + text.replace(/^\s*/mg, prefix ) + '-->';
		//alert(ret);
		return ret;
	});
	
	return outputText.replace(/\s+$/g,'').replace(/\r/g,'\r\n');

}

function getPrefix(prefixIndex)
{
	var span = '    ';
	var output = [];
	for(var i = 0 ; i < prefixIndex; ++i)
	{
		output.push(span);
	}
	
	return output.join('');
}