395 lines
16 KiB
JavaScript
395 lines
16 KiB
JavaScript
/**
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** ==================================================================================================
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** 类名：CLASS_FORMATER
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** 功能：JS格式化
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** 示例：
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---------------------------------------------------------------------------------------------------
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var xx = new CLASS_FORMATER(code);
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document.getElementById("display").innerHTML = xx.format();
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---------------------------------------------------------------------------------------------------
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** 作者：ttyp
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** 邮件：ttyp@21cn.com
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** 日期：2006-5-21
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** 版本：0.1
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** ==================================================================================================
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**/
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function CLASS_FORMAT(code){
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//哈希表类
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function Hashtable(){
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this._hash = new Object();
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this.add = function(key,value){
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if(typeof(key)!="undefined"){
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if(this.contains(key)==false){
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this._hash[key]=typeof(value)=="undefined"?null:value;
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return true;
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} else {
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return false;
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}
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} else {
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return false;
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}
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};
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this.remove = function(key){delete this._hash[key];};
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this.count = function(){var i=0;for(var k in this._hash){i++;} return i;};
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this.items = function(key){return this._hash[key];};
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this.contains = function(key){return typeof(this._hash[key])!="undefined";};
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this.clear = function(){for(var k in this._hash){delete this._hash[k];}};
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}
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this._caseSensitive = true;
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//字符串转换为哈希表
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this.str2hashtable = function(key,cs){
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var _key = key.split(/,/g);
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var _hash = new Hashtable();
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var _cs = true;
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if(typeof(cs)=="undefined"||cs==null){
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_cs = this._caseSensitive;
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} else {
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_cs = cs;
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}
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for(var i in _key){
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if(_cs){
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_hash.add(_key[i]);
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} else {
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_hash.add((_key[i]+"").toLowerCase());
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}
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}
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return _hash;
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};
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//获得需要转换的代码
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this._codetxt = code;
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if(typeof(syntax)=="undefined"){
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syntax = "";
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}
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this._deleteComment = false;
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//是否大小写敏感
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this._caseSensitive = true;
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//可以后面加块语句的关键字
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this._blockElement = this.str2hashtable("switch,if,while,try,finally");
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//是函数申明
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this._function = this.str2hashtable("function");
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//本行括号内分号不做换行
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this._isFor = "for";
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this._choiceElement = this.str2hashtable("else,catch");
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this._beginBlock = "{";
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this._endBlock = "}";
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this._singleEyeElement = this.str2hashtable("var,new,return,else,delete,in,case");
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//得到分割字符
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this._wordDelimiters= " ,.?!;:\\/<>(){}[]\"'\r\n\t=+-|*%@#$^&";
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//引用字符
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this._quotation = this.str2hashtable("\",'");
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//行注释字符
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this._lineComment = "//";
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//转义字符
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this._escape = "\\";
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//多行引用开始
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this._commentOn = "/*";
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//多行引用结束
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this._commentOff = "*/";
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//行结束词
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this._rowEnd = ";";
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this._in = "in";
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this.isComPRess = false;
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this.style = 0;
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this._tabNum = 0;
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this.format = function() {
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var codeArr = new Array();
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var word_index = 0;
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var htmlTxt = new Array();
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if(this.isCompress){
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this._deleteComment = true;
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}
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//得到分割字符数组(分词)
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for (var i = 0; i < this._codetxt.length; i++) {
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if (this._wordDelimiters.indexOf(this._codetxt.charAt(i)) == -1) { //找不到关键字
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if (codeArr[word_index] == null || typeof(codeArr[word_index]) == 'undefined') {
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codeArr[word_index] = "";
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}
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codeArr[word_index] += this._codetxt.charAt(i);
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} else {
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if (typeof(codeArr[word_index]) != 'undefined' && codeArr[word_index].length > 0)
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word_index++;
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codeArr[word_index++] = this._codetxt.charAt(i);
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}
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}
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var quote_opened = false; //引用标记
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var slash_star_comment_opened = false; //多行注释标记
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var slash_slash_comment_opened = false; //单行注释标记
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var line_num = 1; //行号
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var quote_char = ""; //引用标记类型
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var function_opened = false;
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var bracket_open = false;
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var for_open = false;
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//按分割字，分块显示
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for (var i=0; i <=word_index; i++){
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//处理空行（由于转义带来）
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if(typeof(codeArr[i])=="undefined"||codeArr[i].length==0){
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continue;
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} else if(codeArr[i]==" "||codeArr[i]=="\t"){
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if(slash_slash_comment_opened||slash_star_comment_opened){
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if(!this._deleteComment){
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htmlTxt[htmlTxt.length] = codeArr[i];
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}
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}
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if(quote_opened){
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htmlTxt[htmlTxt.length] = codeArr[i];
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}
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} else if(codeArr[i]=="\n"){
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//处理换行
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} else if (codeArr[i] == "\r"){
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slash_slash_comment_opened = false;
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quote_opened = false;
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line_num++;
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if(!this.isCompress){
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htmlTxt[htmlTxt.length] = "\r\n"+ this.getIdent();
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}
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//处理function里的参数标记
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} else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened &&this.isFunction(codeArr[i])){
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htmlTxt[htmlTxt.length] = codeArr[i] + " ";
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function_opened = true;
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} else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened &&codeArr[i]==this._isFor){
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htmlTxt[htmlTxt.length] = codeArr[i];
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for_open = true;
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} else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened &&codeArr[i]=="("){
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bracket_open = true;
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htmlTxt[htmlTxt.length] = codeArr[i];
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} else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened &&codeArr[i]==")"){
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bracket_open = false;
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htmlTxt[htmlTxt.length] = codeArr[i];
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} else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened &&codeArr[i]==this._rowEnd){
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if(!this.isCompress){
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if(!for_open){
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if(i<word_index&&(codeArr[i+1]!="\r"&&codeArr[i+1]!="\n")){
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htmlTxt[htmlTxt.length] = codeArr[i] + "\n" + this.getIdent();
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}else{
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htmlTxt[htmlTxt.length] = codeArr[i] + this.getIdent();
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}
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}else{
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htmlTxt[htmlTxt.length] = codeArr[i];
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}
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}else{
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htmlTxt[htmlTxt.length] = codeArr[i];
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}
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} else if(!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened &&codeArr[i]==this._beginBlock){
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for_open = false;
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if(!this.isCompress){
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switch(this.style){
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case 0:
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this._tabNum++;
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htmlTxt[htmlTxt.length] = codeArr[i] + "\n" + this.getIdent();
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break;
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case 1:
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htmlTxt[htmlTxt.length] = "\n" + this.getIdent();
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this._tabNum++;
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htmlTxt[htmlTxt.length] = codeArr[i] + "\n"+ this.getIdent();
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break;
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default:
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this._tabNum++;
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htmlTxt[htmlTxt.length] = codeArr[i];
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break;
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}
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}else{
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htmlTxt[htmlTxt.length] = codeArr[i];
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}
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} else if(!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened &&codeArr[i]==this._endBlock){
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if(!this.isCompress){
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this._tabNum--;
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if(i<word_index&&codeArr[i+1]!=this._rowEnd){
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htmlTxt[htmlTxt.length] = "\n" + this.getIdent() + codeArr[i];
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}else{
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htmlTxt[htmlTxt.length] = "\n" + this.getIdent() + codeArr[i];
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}
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}else{
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if(i<word_index&&codeArr[i+1]!=this._rowEnd){
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htmlTxt[htmlTxt.length] = codeArr[i] + this._rowEnd;
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}else{
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htmlTxt[htmlTxt.length] = codeArr[i];
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}
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}
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//处理关键字
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} else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened && this.isBlockElement(codeArr[i])){
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htmlTxt[htmlTxt.length] = codeArr[i];
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//处理内置对象(后面加一个空格)
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} else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened && this.isSingleEyeElement(codeArr[i])){
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if(codeArr[i]==this._in){
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htmlTxt[htmlTxt.length] = " ";
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}
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htmlTxt[htmlTxt.length] = codeArr[i] + " ";
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//处理双引号（引号前不能为转义字符）
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} else if (!slash_star_comment_opened&&!slash_slash_comment_opened&&this._quotation.contains(codeArr[i])){
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if (quote_opened){
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//是相应的引号
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if(quote_char==codeArr[i]){
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htmlTxt[htmlTxt.length] = codeArr[i];
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quote_opened = false;
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quote_char = "";
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} else {
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htmlTxt[htmlTxt.length] = codeArr[i];
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}
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} else {
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htmlTxt[htmlTxt.length] = codeArr[i];
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quote_opened = true;
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quote_char = codeArr[i];
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}
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//处理转义字符
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} else if(codeArr[i] == this._escape){
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htmlTxt[htmlTxt.length] = codeArr[i];
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if(i<word_index-1){
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if(codeArr[i+1].charCodeAt(0)>=32&&codeArr[i+1].charCodeAt(0)<=127){
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htmlTxt[htmlTxt.length] = codeArr[i+1].substr(0,1);
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htmlTxt[htmlTxt.length] = codeArr[i+1].substr(1);
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i=i+1;
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}
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}
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//处理多行注释的开始
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} else if (!slash_slash_comment_opened && !slash_star_comment_opened&&!quote_opened&&this.isStartWith(this._commentOn,codeArr,i)){
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slash_star_comment_opened = true;
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if(!this._deleteComment){
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htmlTxt[htmlTxt.length] = this._commentOn;
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}
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i = i + this.getSkipLength(this._commentOn);
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//处理单行注释
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} else if (!slash_slash_comment_opened && !slash_star_comment_opened&&!quote_opened&&this.isStartWith(this._lineComment,codeArr,i)){
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slash_slash_comment_opened = true;
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if(!this._deleteComment){
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htmlTxt[htmlTxt.length] = this._lineComment;
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}
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i = i + this.getSkipLength(this._lineComment);
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//处理忽略词
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} else if (!slash_slash_comment_opened && !slash_star_comment_opened&&!quote_opened&&this.isStartWith(this._ignore,codeArr,i)){
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slash_slash_comment_opened = true;
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htmlTxt[htmlTxt.length] = this._ignore;
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i = i + this.getSkipLength(this._ignore);
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//处理多行注释结束
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} else if (!quote_opened&&!slash_slash_comment_opened&&this.isStartWith(this._commentOff,codeArr,i)){
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if (slash_star_comment_opened) {
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slash_star_comment_opened = false;
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if(!this._deleteComment){
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htmlTxt[htmlTxt.length] = this._commentOff;
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}
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i = i + this.getSkipLength(this._commentOff);
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}
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} else {
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//不是在字符串中
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if(!quote_opened){
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//如果不是在注释重
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if(!slash_slash_comment_opened && !slash_star_comment_opened){
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htmlTxt[htmlTxt.length] = codeArr[i];
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//注释中
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}else{
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if(!this._deleteComment){
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htmlTxt[htmlTxt.length] = codeArr[i];
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}
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}
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}else{
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htmlTxt[htmlTxt.length] = codeArr[i];
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}
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}
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}
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return htmlTxt.join("");
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};
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this.isStartWith = function(str,code,index){
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if(typeof(str)!="undefined"&&str.length>0){
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var cc = new Array();
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for(var i=index;i<index+str.length;i++){
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cc[cc.length] = code[i];
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}
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var c = cc.join("");
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if(this._caseSensitive){
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if(str.length>=code[index].length&&c.indexOf(str)==0){
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return true;
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}
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}else{
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if(str.length>=code[index].length&&c.toLowerCase().indexOf(str.toLowerCase())==0){
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return true;
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}
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}
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return false;
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} else {
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return false;
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}
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};
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this.isFunction = function(val){
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return this._function.contains(this._caseSensitive?val:val.toLowerCase());
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};
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this.isBlockElement = function(val) {
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return this._blockElement.contains(this._caseSensitive?val:val.toLowerCase());
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};
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this.isChoiceElement = function(val) {
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return this._choiceElement.contains(this._caseSensitive?val:val.toLowerCase());
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};
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this.isSingleEyeElement = function(val) {
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return this._singleEyeElement.contains(this._caseSensitive?val:val.toLowerCase());
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};
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this.isNextElement = function(from,word){
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for(var i=from;i<word.length;i++){
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if(word[i]!=" "&&word[i]!="\t"&&word[i]!="\r"&&word[i]!="\n"){
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return this.isChoiceElement(word[i]);
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}
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}
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return false;
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};
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this.getSkipLength = function(val){
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var count = 0;
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for(var i=0;i<val.length;i++){
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if(this._wordDelimiters.indexOf(val.charAt(i))>=0){
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count++;
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}
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}
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if(count>0){
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count=count-1;
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}
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return count;
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};
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this.getIdent=function(){
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var n = [];
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for(var i=0;i<this._tabNum;i++){
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n[n.length] = "\t";
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}
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return n.join("");
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};
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} |