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如何使用Javascript正則表達式來格式化XML內容
使用得是Emeditor ，在看XML文檔時，總是因為格式混亂而看不清。這個是一個Emeditor宏來自動格式化XML。下載：formatXml.rar (1,021.00 bytes)
下面這段是這個網頁版的javascript格式化XML的代碼。
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<meta http-equiv=content-type content="text/html; charset=UTF-8">
<title>Xml格式化工具</title>
<script type="text/javascript">
String.prototype.removeLineEnd = function()
{
return this.replace(/(<.+?s+?)(?:ns*?(.+?=".*?"))/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<");
//把注釋編碼
text = text.replace(/n/g,'r').replace(/<!--(.+?)-->/g,function($0, text)
{
var ret = '<!--' + escape(text) + '-->';
//alert(ret);
return ret;
}).replace(/r/g,'n');
//調整格式
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);
//把注釋還原並解碼，調格式
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,'rn');
}
function getPrefix(prefixIndex)
{
var span = ' ';
var output = [];
for(var i = 0 ; i < prefixIndex; ++i)
{
output.push(span);
}
return output.join('');
}
function btnFormat_click()
{
var $ = document.getElementById;
$('output').value = formatXml($('input').value);
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