有些时间没更新blog了，这两天为了更新<code collection>，于是重写了语法高亮的模块，这次是一个引擎，你可以根据规则任意修改关键字等，经过了不少优化，速度还可以。
支持对js、C#、java、vbs、sql、xml、html语言的语法高亮处理。
截图：
下面是代码：
<HTML><HEAD><TITLE>HighLight</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_HIGHLIGHT ** 功能：语法高亮 ** 示例： --------------------------------------------------------------------------------------------------- var xx = new CLASS_HIGHLIGHT(code,syntax); document.getElementById("display").innerHTML = xx.highlight(); --------------------------------------------------------------------------------------------------- ** 作者：ttyp ** 邮件：ttyp@21cn.com ** 日期：2005-7-31 ** ================================================================================================== **/ function CLASS_HIGHLIGHT(code,syntax) { //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];}} } //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 = 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 = ""; } switch(syntax.toLowerCase()) { case "sql": //是否大小写敏感 this._caseSensitive = false; //得到关键字哈希表 this._keywords = this.str2hashtable("COMMIT,DELETE,INSERT,LOCK,ROLLBACK,SELECT,TRANSACTION,READ,ONLY,WRITE,USE,ROLLBACK,SEGMENT,ROLE,EXCEPT,NONE,UPDATE,DUAL,WORK,COMMENT,FORCE,FROM,WHERE,INTO,VALUES,ROW,SHARE,MODE,EXCLUSIVE,UPDATE,ROW,NOWAIT,TO,SAVEPOINT,UNION,UNION,ALL,INTERSECT,MINUS,START,WITH,CONNECT,BY,GROUP,HAVING,ORDER,UPDATE,NOWAIT,IDENTIFIED,SET,DROP,PACKAGE,CREATE,REPLACE,PROCEDURE,FUNCTION,TABLE,RETURN,AS,BEGIN,DECLARE,END,IF,THEN,ELSIF,ELSE,WHILE,CURSOR,EXCEPTION,WHEN,OTHERS,NO_DATA_FOUND,TOO_MANY_ROWS,CURSOR_ALREADY_OPENED,FOR,LOOP,IN,OUT,TYPE,OF,INDEX,BINARY_INTEGER,RAISE,ROWTYPE,VARCHAR2,NUMBER,LONG,DATE,RAW,LONG RAW,CHAR,INTEGER,MLSLABEL,CURRENT,OF,DEFAULT,CURRVAL,NEXTVAL,LEVEL,ROWID,ROWNUM,DISTINCT,ALL,LIKE,IS,NOT,NULL,BETWEEN,ANY,AND,OR,EXISTS,ASC,DESC,ABS,CEIL,COS,COSH,EXP,FLOOR,LN,LOG,MOD,POWER,ROUND,SIGN,SIN,SINH,SQRT,TAN,TANH,TRUNC,CHR,CONCAT,INITCAP,LOWER,LPAD,LTRIM,NLS_INITCAP,NLS_LOWER,NLS_UPPER,REPLACE,RPAD,RTRIM,SOUNDEX,SUBSTR,SUBSTRB,TRANSLATE,UPPER,ASCII,INSTR,INSTRB,LENGTH,LENGTHB,NLSSORT,ADD_MONTHS,LAST_DAY,MONTHS_BETWEEN,NEW_TIME,NEXT_DAY,ROUND,SYSDATE,TRUNC,CHARTOROWID,CONVERT,HEXTORAW,RAWTOHEX,ROWIDTOCHAR,TO_CHAR,TO_DATE,TO_LABEL,TO_MULTI_BYTE,TO_NUMBER,TO_SINGLE_BYTE,DUMP,GREATEST,GREATEST_LB,LEAST,LEAST_UB,NVL,UID,USER,USERENV,VSIZE,AVG,COUNT,GLB,LUB,MAX,MIN,STDDEV,SUM,VARIANCE"); //得到内建对象哈希表 this._commonObjects = this.str2hashtable(""); //标记 this._tags = this.str2hashtable("",false); //得到分割字符 this._wordDelimiters= " ,.?!;:\\/<>(){}[]\"'\r\n\t=+-|*%@#$^&"; //引用字符 this._quotation = this.str2hashtable("'"); //行注释字符 this._lineComment = "--"; //转义字符 this._escape = ""; //多行引用开始 this._commentOn = "/**//**//**//**//**//**//**//*"; //多行引用结束 this._commentOff = "*/"; //忽略词 this._ignore = ""; //是否处理标记 this._dealTag = false; break; case "c#": //是否大小写敏感 this._caseSensitive = true; //得到关键字哈希表 this._keywords = this.str2hashtable("abstract,as,base,bool,break,byte,case,catch,char,checked,class,const,continue,decimal,default,delegate,do,double,else,enum,event,explicit,extern,false,finally,fixed,float,for,foreach,get,goto,if,implicit,in,int,interface,internal,is,lock,long,namespace,new,null,object,operator,out,override,params,private,protected,public,readonly,ref,return,sbyte,sealed,short,sizeof,stackalloc,static,set,string,struct,switch,this,throw,true,try,typeof,uint,ulong,unchecked,unsafe,ushort,using,value,virtual,void,volatile,while"); //得到内建对象哈希表 this._commonObjects = this.str2hashtable("String,Boolean,DateTime,Int32,Int64,Exception,DataTable,DataReader"); //标记 this._tags = this.str2hashtable("",false); //得到分割字符 this._wordDelimiters= " ,.?!;:\\/<>(){}[]\"'\r\n\t=+-|*%@#$^&"; //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 = "*/"; //忽略词 this._ignore = ""; //是否处理标记 this._dealTag = false; break; case "java": //是否大小写敏感 this._caseSensitive = true; //得到关键字哈希表 this._keywords = this.str2hashtable("abstract,boolean,break,byte,case,catch,char,class,const,continue,default,do,double,else,extends,final,finally,float,for,goto,if,implements,import,instanceof,int,interface,long,native,new,package,private,protected,public,return,short,static,strictfp,super,switch,synchronized,this,throw,throws,transient,try,void,volatile,while"); //得到内建对象哈希表 this._commonObjects = this.str2hashtable("String,Boolean,DateTime,Int32,Int64,Exception,DataTable,DataReader"); //标记 this._tags = this.str2hashtable("",false); //得到分割字符 this._wordDelimiters= " ,.?!;:\\/<>(){}[]\"'\r\n\t=+-|*%@#$^&"; //引用字符 this._quotation = this.str2hashtable("\""); //行注释字符 this._lineComment = "//"; //转义字符 this._escape = "\\"; //多行引用开始 this._commentOn = "/*"; //多行引用结束 this._commentOff = "*/"; //忽略词 this._ignore = ""; //是否处理标记 this._dealTag = false; break; case "vbs": case "vb": //是否大小写敏感 this._caseSensitive = false; //得到关键字哈希表 this._keywords = this.str2hashtable("And,ByRef,ByVal,Call,Case,Class,Const,Dim,Do,Each,Else,ElseIf,Empty,End,Eqv,Erase,Error,Exit,Explicit,False,For,Function,Get,If,Imp,In,Is,Let,Loop,Mod,Next,Not,Nothing,Null,On,Option,Or,Private,Property,Public,Randomize,ReDim,Resume,Select,Set,Step,Sub,Then,To,True,Until,Wend,While,Xor,Anchor,Array,Asc,Atn,CBool,CByte,CCur,CDate,CDbl,Chr,CInt,CLng,Cos,CreateObject,CSng,CStr,Date,DateAdd,DateDiff,DatePart,DateSerial,DateValue,Day,Dictionary,Document,Element,Err,Exp,FileSystemObject,Filter,Fix,Int,Form,FormatCurrency,FormatDateTime,FormatNumber,FormatPercent,GetObject,Hex,Hour,InputBox,InStr,InstrRev,IsArray,IsDate,IsEmpty,IsNull,IsNumeric,IsObject,Join,LBound,LCase,Left,Len,Link,LoadPicture,Location,Log,LTrim,RTrim,Trim,Mid,Minute,Month,MonthName,MsgBox,Navigator,Now,Oct,Replace,Right,Rnd,Round,ScriptEngine,ScriptEngineBuildVersion,ScriptEngineMajorVersion,ScriptEngineMinorVersion,Second,Sgn,Sin,Space,Split,Sqr,StrComp,String,StrReverse,Tan,Time,TextStream,TimeSerial,TimeValue,TypeName,UBound,UCase,VarType,Weekday,WeekDayName,Year"); //得到内建对象哈希表 this._commonObjects = this.str2hashtable("String,Number,Boolean,Date,Integert,Long,Double,Single"); //标记 this._tags = this.str2hashtable("",false); //得到分割字符 this._wordDelimiters= " ,.?!;:\\/<>(){}[]\"'\r\n\t=+-|*%@#$^&"; //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 = ""; //忽略词 this._ignore = "<!--"; //是否处理标记 this._dealTag = false; break; case "js": //是否大小写敏感 this._caseSensitive = true; //得到关键字哈希表 this._keywords = this.str2hashtable("function,void,this,boolean,while,if,return,new,true,false,try,catch,throw,null,else,int,long,do,var"); //得到内建对象哈希表 this._commonObjects = this.str2hashtable("String,Number,Boolean,RegExp,Error,Math,Date"); //标记 this._tags = this.str2hashtable("",false); //得到分割字符 this._wordDelimiters= " ,.?!;:\\/<>(){}[]\"'\r\n\t=+-|*%@#$^&"; //引用字符 this._quotation = this.str2hashtable("\",'"); //行注释字符 this._lineComment = "//"; //转义字符 this._escape = "\\"; //多行引用开始 this._commentOn = "/*"; //多行引用结束 this._commentOff = "*/"; //忽略词 this._ignore = "<!--"; break; case "html": //是否大小写敏感 this._caseSensitive = true; //得到关键字哈希表 this._keywords = this.str2hashtable("function,void,this,boolean,while,if,return,new,true,false,try,catch,throw,null,else,int,long,do,var"); //得到内建对象哈希表 this._commonObjects = this.str2hashtable("String,Number,Boolean,RegExp,Error,Math,Date"); //标记 this._tags = this.str2hashtable("html,head,body,title,style,script,language,input,select,div,span,button,img,iframe,frame,frameset,table,tr,td,caption,form,font,meta,textarea",false); //得到分割字符 this._wordDelimiters= " ,.?!;:\\/<>(){}[]\"'\r\n\t=+-|*%@#$^&"; //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 = "*/"; //忽略词 this._ignore = "<!--"; //是否处理标记 this._dealTag = true; break; case "xml": default: //是否大小写敏感 this._caseSensitive = true; //得到关键字哈希表 this._keywords = this.str2hashtable("!DOCTYPE,?xml,script,version,encoding"); //得到内建对象哈希表 this._commonObjects = this.str2hashtable(""); //标记 this._tags = this.str2hashtable("",false); //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 = "-->"; //忽略词 this._ignore = "<!--"; //是否处理标记 this._dealTag = true; break; } this.highlight = function() { var codeArr = new Array(); var word_index = 0; var htmlTxt = new Array(); //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); } } 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 tag_opened = false; //标记开始 htmlTxt[htmlTxt.length] = ("<div style='font-family: Courier New;font-size:12px;overflow:auto;border-width:1px;border-style:solid;border-color:#8a8a8a;background-color:#eeeeee;margin:1px;padding:6px;'>"); //按分割字，分块显示 for (var i=0; i <=word_index; i++){ //处理空行（由于转义带来） if(typeof(codeArr[i])=="undefined"||codeArr[i].length==0){ continue; } //处理空格 if (codeArr[i] == " "){ htmlTxt[htmlTxt.length] = (" "); //处理关键字 } else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened && this.isKeyword(codeArr[i])){ htmlTxt[htmlTxt.length] = ("<span style='color:#0000FF;'>" + codeArr[i] + "</span>"); //处理普通对象 } else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened && this.isCommonObject(codeArr[i])){ htmlTxt[htmlTxt.length] = ("<span style='color:#808000;'>" + codeArr[i] + "</span>"); //处理标记 } else if (!slash_slash_comment_opened&&!slash_star_comment_opened && !quote_opened && tag_opened && this.isTag(codeArr[i])){ htmlTxt[htmlTxt.length] = ("<span style='color:#0000FF;'>" + codeArr[i] + "</span>"); //处理换行 } else if (codeArr[i] == "\n"){ if (slash_slash_comment_opened){ htmlTxt[htmlTxt.length] = ("</span>"); slash_slash_comment_opened = false; } htmlTxt[htmlTxt.length] = ("<br/>"); line_num++; //处理双引号（引号前不能为转义字符） } else if (this._quotation.contains(codeArr[i])&&!slash_star_comment_opened&&!slash_slash_comment_opened){ if (quote_opened){ //是相应的引号 if(quote_char==codeArr[i]){ if(tag_opened){ htmlTxt[htmlTxt.length] = (codeArr[i]+"</span><span style='color:#808000;'>"); } else { htmlTxt[htmlTxt.length] = (codeArr[i]+"</span>"); } quote_opened = false; quote_char = ""; } else { htmlTxt[htmlTxt.length] = codeArr[i].replace(/\</g,"<"); } } else { if(tag_opened){ htmlTxt[htmlTxt.length] = ("</span><span style='color:#FF00FF;'>"+codeArr[i]); } else { htmlTxt[htmlTxt.length] = ("<span style='color:#FF00FF;'>"+codeArr[i]); } quote_opened = true; quote_char = codeArr[i]; } //处理转义字符 } else if(codeArr[i] == this._escape){ htmlTxt[htmlTxt.length] = (codeArr[i]); if(i<word_index-1){ if(codeArr[i+1].charCodeAt(0)>=32&&codeArr[i+1].charCodeAt(0)<=127){ htmlTxt[htmlTxt.length] = codeArr[i+1].substr(0,1).replace("&","&").replace(/\</g,"<"); codeArr[i+1] = codeArr[i+1].substr(1); } } //处理Tab } else if (codeArr[i] == "\t") { htmlTxt[htmlTxt.length] = (" "); //处理多行注释的开始 } else if (this.isStartWith(this._commentOn,codeArr,i)&&!slash_slash_comment_opened && !slash_star_comment_opened&&!quote_opened){ slash_star_comment_opened = true; htmlTxt[htmlTxt.length] = ("<span style='color:#008000;'>" + this._commentOn.replace(/\</g,"<")); i = i + this._commentOn.length-1; //处理单行注释 } else if (this.isStartWith(this._lineComment,codeArr,i)&&!slash_slash_comment_opened && !slash_star_comment_opened&&!quote_opened){ slash_slash_comment_opened = true; htmlTxt[htmlTxt.length] = ("<span style='color:#008000;'>" + this._lineComment); i = i + this._lineComment.length-1; //处理忽略词 } else if (this.isStartWith(this._ignore,codeArr,i)&&!slash_slash_comment_opened && !slash_star_comment_opened&&!quote_opened){ slash_slash_comment_opened = true; htmlTxt[htmlTxt.length] = ("<span style='color:#008000;'>" + this._ignore.replace(/\</g,"<")); i = i + this._ignore.length-1; //处理多行注释结束 } else if (this.isStartWith(this._commentOff,codeArr,i)&&!quote_opened&&!slash_slash_comment_opened){ if (slash_star_comment_opened) { slash_star_comment_opened = false; htmlTxt[htmlTxt.length] = (this._commentOff +"</span>"); i = i + this._commentOff.length-1; } //处理左标记 } else if (this._dealTag&&!slash_slash_comment_opened && !slash_star_comment_opened&&!quote_opened&&codeArr[i] == "<") { htmlTxt[htmlTxt.length] = "<<span style='color:#808000;'>"; tag_opened = true; //处理右标记 } else if (this._dealTag&&tag_opened&&codeArr[i] == ">") { htmlTxt[htmlTxt.length] = "</span>>"; tag_opened = false; //处理HTML转义符号 } else if (codeArr[i] == "&") { htmlTxt[htmlTxt.length] = "&"; } else { htmlTxt[htmlTxt.length] = codeArr[i].replace(/\</g,"<"); } } htmlTxt[htmlTxt.length] = ("</div>"); return htmlTxt.join(""); } this.isStartWith = function(str,code,index){ if(typeof(str)!="undefined"&&str.length>0){ for(var i=0;i<str.length;i++){ if(this._caseSensitive){ if(str.charAt(i)!=code[index+i]||(index+i>=code.length)){ return false; } } else { if(str.charAt(i).toLowerCase()!=code[index+i].toLowerCase()||(index+i>=code.length)){ return false; } } } return true; } else { return false; } } this.isKeyword = function(val) { return this._keywords.contains(this._caseSensitive?val:val.toLowerCase()); } this.isCommonObject = function(val) { return this._commonObjects.contains(this._caseSensitive?val:val.toLowerCase()); } this.isTag = function(val) { return this._tags.contains(val.toLowerCase()); } } function go() { var code = document.getElementById("code").value; var syntax = document.getElementById("syntax").value; var xx = new CLASS_HIGHLIGHT(code,syntax); var a = new Date(); document.getElementById("display").innerHTML = xx.highlight(); alert("共花：" + (new Date().getTime()-a.getTime()) + "ms"); } //--> </SCRIPT> <TEXTAREA id=code rows=12 cols=60>//这是一个测试 function aa() { alert("\\as//ldfjl;asdk/*sdfsdf*/sdf,sdfs"); } </TEXTAREA> <BR><SELECT id=syntax> <OPTION value=js selected>js</OPTION> <OPTION value=c#>c#</OPTION> <OPTION value=java>java</OPTION> <OPTION value=vbs>vbs</OPTION> <OPTION value=sql>sql</OPTION> <OPTION value=xml>xml</OPTION> <OPTION value=html>html</OPTION></SELECT> <INPUT onclick=go() type=button value=go> <SPAN id=display></SPAN></BODY></HTML> [提示：你可先修改部分代码，再按运行]
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