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Javascript 中的 JavaScript版代码高亮

出处:互联网   整理: 软晨网（RuanChen.com）   发布: 2009-10-12   浏览: 286 ::
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>JavaScript版代码高亮</title>
<link href="style.css" rel="stylesheet" type="text/css" />
</head>

<body>
<div class="menu_head">JavaScript版代码高亮显示</div>
<div class="content">
<script language="JavaScript" type="text/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();
** ======================================================================================
**/

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];}}
}

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 = "";
}

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;margin:1px;padding:6px;color:#333333'>");

//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] == "\r"){
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){
if (codeArr[i+1].charCodeAt(0)>=32&&codeArr[i+1].charCodeAt(0)<=127){
htmlTxt[htmlTxt.length] = codeArr[i+1].substr(0,1);
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 doHighlight(o, syntax){
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_HIGHLIGHT(_codetxt,syntax);

htmltxt = _syn.highlight();

return htmltxt;
}
</script>

<script language="JavaScript" type="text/javascript">
function plaster(){
document.form1.m.focus()
document.execCommand("Paste")
}

function goit(stx){
var code = document.getElementById("m").innerText;
var xx = new CLASS_HIGHLIGHT(code,stx);
document.getElementById("highlight").innerHTML = xx.highlight();
}
</script>

<form method="post" name="form1">
<div align="center"><textarea rows="18" name="S1" style="width:99%" id="m"></textarea></div>
<input type="button" value="HTML" onclick="return goit('html')" />
<input type="button" value="VB/VBScript" onclick="return goit('vb')" />
<input type="button" value="JavaScript" onclick="return goit('js')" />
<input type="button" value="C#" onclick="return goit('c#')" />
<input type="button" value="SQL" onclick="return goit('sql')" />
<input type="button" value="XML" onclick="return goit('xml')" />
<input type="button" value="Java" onclick="return goit('java')" />
<input type="button" value="粘贴" onclick="plaster()" />
<input type="reset" value="清空内容" />
</form>
<div align="center">

</div>
<div id="highlight" align="left" style="width:98%;overflow:auto;word-wrap:word-break;word-break:break-all;"><div>
</div>
</body>
</html>