JavaScript版代码高亮

日期：2020-06-13 栏目：程序人生浏览：次

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<div>JavaScript版代码高亮显示</div>
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<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();
** ======================================================================================
**/

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  = "";
   //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();

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JavaScript版代码高亮

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