JS代码的格式化和压缩

曾经为看别人写的杂乱代码而头痛吗?曾经为看BWindow代码而烦恼吗?曾经为减小JS体积和JS的可读性之间的矛盾而左右徘徊吗?最好的办法是有个代码格式化和代码压缩的程序,今天总算有了,它是纯JS编写的,当然也就是开源的了.由于写的仓促,还有些小BUG,请经常注意更新!

Format

document.getElementById("display").innerHTML = xx.format();

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** 作者：ttyp
** 邮件：ttyp@21cn.com
** 日期：2006-5-21
** 版本：0.1
** ==================================================================================================
**/

function CLASS_FORMAT(code){
//哈希表类
function Hashtable(){
this._hash = new Object();
this.add = function(key,value){
if(typeof(key)!="undefined"){
if(this.contains(key)==false){
this._hash[key]=typeof(value)=="undefined"?null:value;
return true;
} else {
return false;
}
} else {
return false;
}
}
this.remove = function(key){delete this._hash[key];}
this.count = function(){var i=0;for(var k in this._hash){i++;} return i;}
this.items = function(key){return this._hash[key];}
this.contains = function(key){return typeof(this._hash[key])!="undefined";}
this.clear = function(){for(var k in this._hash){delete this._hash[k];}}

}

this._caseSensitive = true;

//字符串转换为哈希表
this.str2hashtable = function(key,cs){

var _key = key.split(/,/g);
var _hash = new Hashtable();
var _cs = true;

if(typeof(cs)=="undefined"||cs==null){
_cs = this._caseSensitive;
} else {
_cs = cs;
}

for(var i in _key){
if(_cs){
_hash.add(_key[i]);
} else {
_hash.add((_key[i]+"").toLowerCase());
}

}
return _hash;
}

//获得需要转换的代码
this._codetxt = code;

if(typeof(syntax)=="undefined"){
syntax = "";
}

this._deleteComment = false;
//是否大小写敏感
this._caseSensitive = true;
//可以后面加块语句的关键字
this._blockElement = this.str2hashtable("switch,if,while,try,finally");
//是函数申明
this._function = this.str2hashtable("function");
//本行括号内分号不做换行
this._isFor = "for";

this._choiceElement = this.str2hashtable("else,catch");

this._beginBlock = "{";
this._endBlock = "}";

this._singleEyeElement = this.str2hashtable("var,new,return,else,delete,in,case");
//得到分割字符
this._wordDelimiters= "　 ,.?!;:\\/(){}[]\"'\r\n\t=+-|*%@#$^&";
//引用字符
this._quotation = this.str2hashtable("\",'");
//行注释字符
this._lineComment = "//";
//转义字符
this._escape = "\\";
//多行引用开始
this._commentOn = "/*";
//多行引用结束
this._commentOff = "*/";
//行结束词
this._rowEnd = ";";

this._in = "in";

this.isCompress = false;
this.style = 0;

this._tabNum = 0;

this.format = function() {
var codeArr = new Array();
var word_index = 0;
var htmlTxt = new Array();

if(this.isCompress){
this._deleteComment = true;
}

//得到分割字符数组(分词)
for (var i = 0; i 0)
word_index++;
codeArr[word_index++] = this._codetxt.charAt(i);
}
}

var quote_opened = false; //引用标记
var slash_star_comment_opened = false; //多行注释标记
var slash_slash_comment_opened = false; //单行注释标记
var line_num = 1; //行号
var quote_char = ""; //引用标记类型

var function_opened = false;

var bracket_open = false;
var for_open = false;

//按分割字，分块显示
for (var i=0; i

} else if(!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened &&codeArr[i]==this._endBlock){
if(!this.isCompress){
this._tabNum--;
if(i=32&&codeArr[i+1].charCodeAt(0)

return htmlTxt.join("");
}

this.isStartWith = function(str,code,index){

if(typeof(str)!="undefined"&&str.length>0){
var cc = new Array();
for(var i=index;i=code[index].length&&c.indexOf(str)==0){
return true;
}
}else{
if(str.length>=code[index].length&&c.toLowerCase().indexOf(str.toLowerCase())==0){
return true;
}
}
return false;

} else {
return false;
}
}

this.isFunction = function(val){
return this._function.contains(this._caseSensitive?val:val.toLowerCase());
}

this.isBlockElement = function(val) {
return this._blockElement.contains(this._caseSensitive?val:val.toLowerCase());
}

this.isChoiceElement = function(val) {
return this._choiceElement.contains(this._caseSensitive?val:val.toLowerCase());
}

this.isSingleEyeElement = function(val) {
return this._singleEyeElement.contains(this._caseSensitive?val:val.toLowerCase());
}

this.isNextElement = function(from,word){
for(var i=from;i

this.getSkipLength = function(val){
var count = 0;
for(var i=0;i=0){
count++;
}
}
if(count>0){
count=count-1;
}
return count;
}

this.getIdent=function(){
var n = [];
for(var i=0;i

function doformat(o){
var htmltxt = "";

if (o == null){
alert("domNode is null!");
return;
}

var _codetxt = "";

if(typeof(o)=="object"){
switch(o.tagName){
case "TEXTAREA":
case "INPUT":
_codetxt = o.value;
break;
case "DIV":
case "SPAN":
_codetxt = o.innerText;
break;
default:
_codetxt = o.innerHTML;
break;
}
}else{
_codetxt = o;
}

var _syn = new CLASS_FORMAT(_codetxt);
htmltxt = _syn.format();
return htmltxt;
}

function go()
{
var code = document.getElementById("code").value;
var xx = new CLASS_FORMAT(code);
var a = new Date();

if(document.getElementById('cboOperate').selectedIndex==1){
xx.isCompress=true;
}else{
xx.style = parseInt(document.getElementById('cboStyle').value);
}
document.getElementById("display").value = xx.format();
alert("共花：" + (new Date().getTime()-a.getTime()) + "ms");
}
//-->

/*
这个是一个类
*/

function xx (num,str){//说明
var a = num;this.aa = a;
this.bb = function(){alert(str);}
this.cc = function(){for(var i=0;i

xx.prototype.dd= function(){alert("d d kd");}

var a = new xx(100,"hello"),b=new xx(0,"ttyp");
if(1>2) { alert();
}
else {
alert(" hell ");
}

a.bb();
b.dd();
alert(a.aa);

格式化
压缩

经典
微软

[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]