JS(javascript)代码的格式化和压缩代码生成__脚本特效

JS(javascript)代码的格式化和压缩

时间： 2008-12-27 23:36:03　阅读次数：2506

JS(javascript)代码的格式化和压缩

<HTML><HEAD><TITLE>Format</TITLE>
<META content="MSHTML 6.00.2800.1528" name=GENERATOR>
<META content="" name=Author>
<META content="" name=Keywords>
<META content="" name=Description></HEAD>
<BODY>
<SCRIPT language=JavaScript>
<!--
/**//**//**//** 
**    ==================================================================================================  
**    类名：CLASS_FORMATER
**    功能：JS格式化  
**    示例：  
    ---------------------------------------------------------------------------------------------------  
  
            var xx        = new CLASS_FORMATER(code);            
            document.getElementById("display").innerHTML = xx.format(); 
  
    ---------------------------------------------------------------------------------------------------  
**    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 < this._codetxt.length; i++) {       
            if (this._wordDelimiters.indexOf(this._codetxt.charAt(i)) == -1) {        //找不到关键字
                if (codeArr[word_index] == null || typeof(codeArr[word_index]) == 'undefined') {
                    codeArr[word_index] = "";
                }
                codeArr[word_index] += this._codetxt.charAt(i);
            } else {
                if (typeof(codeArr[word_index]) != 'undefined' && codeArr[word_index].length > 0)
                    word_index++;
                codeArr[word_index++] = this._codetxt.charAt(i);                
            } 
        }

提示：您可以先修改部分代码再运行