git.roojs.org Git - gnome.introspection-doc-generator/blob - JSDOC/ScopeParser.js

   1 //<Script type="text/javascript">
   2
   3 Scope = imports['JSDOC/Scope.js'].Scope;
   4
   5 /**
   6 * Scope stuff
   7 *
   8 * // FIXME - I need this to do next() without doccomments..
   9 *
  10 *
  11 *
  12 * Need to make this alot simpler...
  13 *
  14 * so debugging is possible.
  15 *
  16 *
  17 * at present it just runs along the stream and finds stuff then calls parseExpr .. etc,,
  18 *
  19 *
  20 * It would be better to parse blocks of code rather than the whole stream..
  21 *
  22 *
  23 *
  24 *
  25 *
  26 */
  27
  28 ScopeParser = function(ts) {
  29     this.ts = ts; // {TokenStream}
  30     this.warnings = [];
  31     this.scopes = [];
  32     this.indexedScopes = {};
  33     this.timer = new Date() * 1;
  34     this.debug = false;
  35 }
  36
  37 // list of keywords that should not be used in object literals.
  38 ScopeParser.idents = [
  39         "break",
  40         "case",
  41         "continue",
  42         "default",
  43         "delete",
  44         "do",
  45         "else",
  46         "export",
  47         "false",
  48         "for",
  49         "function",
  50         "if",
  51         "import",
  52         "in",
  53         "new",
  54         "null",
  55         "return",
  56         "switch",
  57         "this",
  58         "true",
  59         "typeof",
  60         "var",
  61         "void",
  62         "while",
  63         "with",
  64
  65         "catch",
  66         "class",
  67         "const",
  68         "debugger",
  69         "enum",
  70         "extends",
  71         "finally",
  72         "super",
  73         "throw",
  74         "try",
  75
  76         "abstract",
  77         "boolean",
  78         "byte",
  79         "char",
  80         "double",
  81         "final",
  82         "float",
  83         "goto",
  84         "implements",
  85         "instanceof",
  86         "int",
  87         "interface",
  88         "long",
  89         "native",
  90         "package",
  91         "private",
  92         "protected",
  93         "public",
  94         "short",
  95         "static",
  96         "synchronized",
  97         "throws",
  98         "transient",
  99                 "include",
 100                 "undefined"
 101 ];
 102
 103
 104 ScopeParser.prototype = {
 105     timer: 0,
 106     timerPrint: function (str) {
 107         var ntime = new Date() * 1;
 108         var tdif =  ntime -this.timer;
 109         this.timer = ntime;
 110         var pref = '';
 111         if (tdif > 100) { //slower ones..
 112             pref = '***';
 113         }
 114         println(pref+'['+tdif+']'+str);
 115
 116     },
 117     warn: function(s) {
 118         //print('****************' + s);
 119         this.warnings.push(s);
 120         //println("WARNING:" + htmlescape(s) + "<BR>");
 121     },
 122     // defaults should not be initialized here =- otherwise they get duped on new, rather than initalized..
 123     warnings : false,
 124     ts : false,
 125     scopes : false,
 126     global : false,
 127     mode : "", //"BUILDING_SYMBOL_TREE",
 128     braceNesting : 0,
 129     indexedScopes : false,
 130     munge: true,
 131
 132
 133
 134
 135
 136     buildSymbolTree : function()
 137     {
 138         //println("<PRE>");
 139
 140         this.ts.rewind();
 141         this.braceNesting = 0;
 142         this.scopes = [];
 143
 144
 145
 146
 147         this.globalScope = new  Scope(-1, false, -1, '');
 148         indexedScopes = { 0 : this.globalScope };
 149
 150         this.mode = 'BUILDING_SYMBOL_TREE';
 151         this.parseScope(this.globalScope);
 152
 153         //print("---------------END PASS 1 ---------------- ");
 154
 155     },
 156     mungeSymboltree : function()
 157     {
 158
 159         if (!this.munge) {
 160             return;
 161         }
 162
 163         // One problem with obfuscation resides in the use of undeclared
 164         // and un-namespaced global symbols that are 3 characters or less
 165         // in length. Here is an example:
 166         //
 167         //     var declaredGlobalVar;
 168         //
 169         //     function declaredGlobalFn() {
 170         //         var localvar;
 171         //         localvar = abc; // abc is an undeclared global symbol
 172         //     }
 173         //
 174         // In the example above, there is a slim chance that localvar may be
 175         // munged to 'abc', conflicting with the undeclared global symbol
 176         // abc, creating a potential bug. The following code detects such
 177         // global symbols. This must be done AFTER the entire file has been
 178         // parsed, and BEFORE munging the symbol tree. Note that declaring
 179         // extra symbols in the global scope won't hurt.
 180         //
 181         // Note: Since we go through all the tokens to do this, we also use
 182         // the opportunity to count how many times each identifier is used.
 183
 184         this.ts.rewind();
 185         this.braceNesting = 0;
 186         this.scopes= [];
 187         this.mode = 'PASS2_SYMBOL_TREE';
 188
 189         //println("MUNGING?");
 190
 191         this.parseScope(this.globalScope);
 192         this.globalScope.munge();
 193     },
 194
 195
 196     log : function(str)
 197     {
 198         print ("                    ".substring(0, this.braceNesting*2) + str);
 199
 200         //println("<B>LOG:</B>" + htmlescape(str) + "<BR/>\n");
 201     },
 202     logR : function(str)
 203     {
 204             //println("<B>LOG:</B>" + str + "<BR/>");
 205     },
 206
 207
 208
 209
 210
 211     parseScope : function(scope) // parse a token stream..
 212     {
 213         //this.timerPrint("parseScope EnterScope");
 214         //this.log(">>> ENTER SCOPE" + this.scopes.length);
 215         var symbol;
 216         var token;
 217
 218         var identifier;
 219
 220         var expressionBraceNesting = this.braceNesting + 0;
 221
 222         var parensNesting = 0;
 223
 224         var isObjectLitAr = [ false ];
 225         var isInObjectLitAr;
 226         this.scopes.push(scope);
 227
 228         var scopeIndent = '';
 229         this.scopes.forEach(function() {
 230             scopeIndent += '   ';
 231         });
 232         //print(scopeIndent + ">> ENTER SCOPE");
 233
 234
 235
 236
 237         token = this.ts.lookTok(1);
 238         while (token) {
 239           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 240             //this.dumpToken(token , this.scopes, this.braceNesting);
 241             //print('SCOPE:' + token.toString());
 242             //this.log(token.data);
 243             if (token.type == 'NAME') {
 244             //    print('*' + token.data);
 245             }
 246             switch(token.type + '.' + token.name) {
 247                 case "KEYW.VAR":
 248                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 249                     print('SCOPE-VAR:' + token.toString());
 250                     var vstart = this.ts.cursor +1;
 251
 252                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 253                     while (true) {
 254                         token = this.ts.nextTok();
 255                         !this.debug|| print( token.toString());
 256
 257                         if (!token) { // can return false at EOF!
 258                             break;
 259                         }
 260                         if (token.name == "VAR" || token.data == ',') { // kludge..
 261                             continue;
 262                         }
 263                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 264                         if (token.type !="NAME") {
 265                             for(var i = Math.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 266                                 print(this.ts.tokens[i].toString());
 267                             }
 268
 269                             print( "var without ident");
 270                             Seed.quit()
 271                         }
 272
 273
 274                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 275                             identifier = scope.getIdentifier(token.data) ;
 276
 277                             if (identifier == false) {
 278                                 scope.declareIdentifier(token.data, token);
 279                             } else {
 280                                 token.identifier = identifier;
 281                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 282                             }
 283                         }
 284
 285                         token = this.ts.nextTok();
 286                         !this.debug|| print(token.toString());
 287                         /*
 288                         assert token.getType() == Token.SEMI ||
 289                                 token.getType() == Token.ASSIGN ||
 290                                 token.getType() == Token.COMMA ||
 291                                 token.getType() == Token.IN;
 292                         */
 293                         if (token.name == "IN") {
 294                             break;
 295                         } else {
 296                             //var bn = this.braceNesting;
 297                             var bn = this.braceNesting;
 298                             this.parseExpression();
 299                             this.braceNesting = bn;
 300                             //this.braceNesting = bn;
 301                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 302
 303                             token = this.ts.lookTok(1);
 304                             !this.debug|| print("AFTER EXP: " + token.toString());
 305                             if (token.data == ';') {
 306                                 break;
 307                             }
 308                         }
 309                     }
 310
 311                     //print("VAR:")
 312                     //this.ts.dump(vstart , this.ts.cursor);
 313
 314                     break;
 315                 case "KEYW.FUNCTION":
 316                     print('SCOPE-FUNC:' + token.toString());
 317                     //println("<i>"+token.data+"</i>");
 318                      var bn = this.braceNesting;
 319                     this.parseFunctionDeclaration();
 320                      this.braceNesting = bn;
 321                     break;
 322
 323                 case "PUNC.LEFT_CURLY": // {
 324                     print('SCOPE-CURLY:' + JSON.stringify(token,null,4));
 325                     //println("<i>"+token.data+"</i>");
 326                     isObjectLitAr.push(false);
 327                     this.braceNesting++;
 328
 329                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 330                     break;
 331 /*
 332                 case "PUNC.RIGHT_CURLY": // }
 333                     //println("<i>"+token.data+"</i>");
 334                     this.braceNesting--;
 335                     isObjectLitAr.pop();
 336                     //print(">>>>>> OBJLIT POP"+ this.braceNesting);
 337                         //assert braceNesting >= scope.getBra ceNesting();
 338
 339                     if (this.braceNesting < expressionBraceNesting) {
 340                         var ls = this.scopes.pop();
 341                         ls.getUsedSymbols();
 342                         // eat symbol if we are currently at {
 343                         if (this.ts.look(0).data == '{') {
 344                             this.ts.nextTok();
 345                         }
 346
 347                         print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 348                         return;
 349                     }
 350                     break;
 351 */
 352                 case "KEYW.WITH":
 353                     print('SCOPE-WITH:' + token.toString());
 354                     //println("<i>"+token.data+"</i>");
 355                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 356                         // Inside a 'with' block, it is impossible to figure out
 357                         // statically whether a symbol is a local variable or an
 358                         // object member. As a consequence, the only thing we can
 359                         // do is turn the obfuscation off for the highest scope
 360                         // containing the 'with' block.
 361                         this.protectScopeFromObfuscation(scope);
 362                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 363                     }
 364                     break;
 365
 366                 case "KEYW.CATCH":
 367                     print('SCOPE-CATCH:' + token.toString());
 368                     //println("<i>"+token.data+"</i>");
 369                     this.parseCatch();
 370                     break;
 371                 /*
 372                 case Token.SPECIALCOMMENT:
 373                         if (mode == BUILDING_SYMBOL_TREE) {
 374                             protectScopeFromObfuscation(scope);
 375                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 376                         }
 377                         break;
 378                 */
 379
 380                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 381                 case "STRN.SINGLE_QUOTE":
 382                     print('SCOPE-STRING:' + token.toString());
 383                     //println("<i>"+token.data+"</i>");
 384
 385                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 386                         // then we are in an object lit.. -> we need to flag the brace as such...
 387                         isObjectLitAr.pop();
 388                         isObjectLitAr.push(true);
 389                         //print(">>>>>> OBJLIT REPUSH(true)");
 390                     }
 391                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 392
 393                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 394                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 395                         // see if we can replace..
 396                         // remove the quotes..
 397                         // should do a bit more checking!!!! (what about wierd char's in the string..
 398                         var str = token.data.substring(1,token.data.length-1);
 399                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 400                             token.outData = str;
 401                         }
 402
 403
 404
 405                     }
 406
 407
 408
 409                     break;
 410
 411                 case "NAME.NAME":
 412                     print('SCOPE-NAME:' + token.toString());
 413                     //print("DEAL WITH NAME:");
 414                     // got identifier..
 415
 416                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 417                     if ((this.ts.lookTok(-1).data == "{") && (this.ts.lookTok(1).data == ":")) {
 418                         isObjectLitAr.pop();
 419                         isObjectLitAr.push(true);
 420                         //print(">>>>>> OBJLIT REPUSH(true)");
 421                         //println("<i>"+token.data+"</i>");
 422                         break;
 423                     }
 424                    // print("DEAL WITH obj lit:");
 425                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 426
 427                     if (isInObjectLitAr && (this.ts.lookTok(1).data == ":") && (this.ts.lookTok(-1).data == ",")) {
 428                         // skip, it's an object lit key..
 429                         //println("<i>"+token.data+"</i>");
 430                         break;
 431                     }
 432
 433
 434                     // skip anyting with "." before it..!!
 435
 436                     if (this.ts.lookTok(-1).data == ".") {
 437                         // skip, it's an object prop.
 438                         //println("<i>"+token.data+"</i>");
 439                         break;
 440                     }
 441                     //print("SYMBOL: " + token.toString());
 442
 443                     symbol = token.data;
 444                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 445
 446                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 447
 448                         //print ("MUNGE?" + symbol);
 449
 450                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 451
 452                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 453                         identifier = this.getIdentifier(symbol, scope);
 454
 455                         if (identifier == false) {
 456 // BUG!find out where builtin is defined...
 457                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 458                                 // Here, we found an undeclared and un-namespaced symbol that is
 459                                 // 3 characters or less in length. Declare it in the global scope.
 460                                 // We don't need to declare longer symbols since they won't cause
 461                                 // any conflict with other munged symbols.
 462                                 this.globalScope.declareIdentifier(symbol, token);
 463                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 464                             }
 465
 466                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 467                         } else {
 468                             token.identifier = identifier;
 469                             identifier.refcount++;
 470                         }
 471                     }
 472
 473                     break;
 474                     //println("<B>SID</B>");
 475                 default:
 476                     if (token.type != 'KEYW') {
 477                         break;
 478                     }
 479                     print('SCOPE-KEYW:' + token.toString());
 480                    // print("Check eval:");
 481
 482                     symbol = token.data;
 483
 484                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 485
 486                         if (symbol == "eval") {
 487                             // look back one and see if we can find a comment!!!
 488                             if (this.ts.look(-1).type == "COMM") {
 489                                 // look for eval:var:noreplace\n
 490                                 var _t = this;
 491                                 this.ts.look(-1).data.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 492
 493                                     var hi = _t.getIdentifier(a, scope);
 494                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 495                                     if (hi) {
 496                                      //   println("PROTECT "+a+" from munge");
 497                                         hi.toMunge = false;
 498                                     }
 499
 500                                 });
 501
 502
 503                             } else {
 504
 505
 506                                 this.protectScopeFromObfuscation(scope);
 507                                 this.warn("Using 'eval' is not recommended. (use  eval:var:noreplace in comments to optimize) " + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 508                             }
 509
 510                         }
 511
 512                     }
 513                     break;
 514
 515
 516             } // end switch
 517
 518
 519             //print("parseScope TOK : " + token.toString());
 520             token = this.ts.nextTok();
 521             //if (this.ts.nextT()) break;
 522
 523         }
 524         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 525     },
 526
 527     expN : 0,
 528     parseExpression : function() {
 529
 530         // Parse the expression until we encounter a comma or a semi-colon
 531         // in the same brace nesting, bracket nesting and paren nesting.
 532         // Parse functions if any...
 533         //println("<i>EXP</i><BR/>");
 534         !this.debug || print("PARSE EXPR");
 535         this.expN++;
 536
 537         // for printing stuff..
 538
 539
 540
 541         var symbol;
 542         var token;
 543         var currentScope;
 544         var identifier;
 545
 546         var expressionBraceNesting = this.braceNesting + 0;
 547         var bracketNesting = 0;
 548         var parensNesting = 0;
 549         var isInObjectLitAr;
 550         var isObjectLitAr = [ false ];
 551
 552         currentScope = this.scopes[this.scopes.length-1];
 553
 554         var scopeIndent = '';
 555         this.scopes.forEach(function() {
 556             scopeIndent += '   ';
 557         });
 558         //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 559         while (token = this.ts.lookTok()) {
 560
 561
 562
 563            /*
 564             // moved out of loop?
 565            currentScope = this.scopes[this.scopes.length-1];
 566
 567             var scopeIndent = '';
 568             this.scopes.forEach(function() {
 569                 scopeIndent += '   ';
 570             });
 571            */
 572
 573            //this.dumpToken(token,  this.scopes, this.braceNesting );
 574            //print('EXP' + this.expN + ':' + token.toString());
 575
 576
 577             //println("<i>"+token.data+"</i>");
 578             //this.log("EXP:" + token.data);
 579             switch (token.type) {
 580                 case 'PUNC':
 581                     switch(token.data) {
 582
 583                         case ';':
 584                         case ',':
 585                             if (this.braceNesting == expressionBraceNesting &&
 586                                     bracketNesting == 0 &&
 587                                     parensNesting == 0) {
 588                                 print(scopeIndent + "<< EXIT EXPRESSION");
 589                                 this.expN--;
 590                                 return;
 591                             }
 592                             break;
 593
 594
 595
 596                         case '{': //Token.LC:
 597                             isObjectLitAr.push(false);
 598
 599                             this.braceNesting++;
 600                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 601                             break;
 602
 603                         case '}': //Token.RC:
 604                             this.braceNesting--;
 605                             isObjectLitAr.pop();
 606                             //print(">>>>> EXP POP" + this.braceNesting);
 607                            // assert braceNesting >= expressionBraceNesting;
 608                             break;
 609
 610                         case '[': //Token.LB:
 611                             bracketNesting++;
 612                             break;
 613
 614                         case ']': //Token.RB:
 615                             bracketNesting--;
 616                             break;
 617
 618                         case '(': //Token.LP:
 619                             parensNesting++;
 620                             break;
 621
 622                         case ')': //Token.RP:
 623                             parensNesting--;
 624                             break;
 625                     }
 626                     break;
 627
 628                 case 'STRN': // used for object lit detection..
 629                     if (this.ts.lookTok(-1).data == "{" && this.ts.lookTok(1).data == ":" ) {
 630                         // then we are in an object lit.. -> we need to flag the brace as such...
 631                         isObjectLitAr.pop();
 632                         isObjectLitAr.push(true);
 633                         //print(">>>>> EXP PUSH(true)");
 634                     }
 635
 636
 637
 638                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 639                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ":"  &&
 640                         ( this.ts.lookTok(-1).data == "{"  ||  this.ts.lookTok(-1).data == "," )) {
 641                         // see if we can replace..
 642                         // remove the quotes..
 643                         var str = token.data.substring(1,token.data.length-1);
 644                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 645                             token.outData = str;
 646                         }
 647
 648
 649
 650                     }
 651
 652                     break;
 653
 654
 655
 656                 case 'NAME':
 657
 658                     symbol = token.data;
 659                     //print("in NAME = " + token.toString());
 660                     //print("in NAME 0: " + this.ts.look(0).toString());
 661                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 662                     if (this.ts.look(0).data == "{"  && this.ts.lookTok(2).data == ":") {
 663                         // then we are in an object lit.. -> we need to flag the brace as such...
 664                         isObjectLitAr.pop();
 665                         isObjectLitAr.push(true);
 666                          //print(">>>>> EXP  PUSH(true)");
 667                         break;
 668                     }
 669
 670                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 671                     //print ("isInObjectLitAr : " + isInObjectLitAr + ' ' + token.toString());
 672
 673                     if (isInObjectLitAr && this.ts.lookTok(0).data == "," && this.ts.lookTok(2).data == ":") {
 674                         break;
 675                     }
 676                     //print(this.ts.lookTok(0).data);
 677                     if (this.ts.lookTok(0).data == ".") {
 678                         //skip '.'
 679                         break;
 680                     }
 681
 682                      if (this.mode == 'PASS2_SYMBOL_TREE') {
 683
 684                         identifier = this.getIdentifier(symbol, currentScope);
 685                         //println("<B>??</B>");
 686                         if (identifier == false) {
 687
 688                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 689                                 // Here, we found an undeclared and un-namespaced symbol that is
 690                                 // 3 characters or less in length. Declare it in the global scope.
 691                                 // We don't need to declare longer symbols since they won't cause
 692                                 // any conflict with other munged symbols.
 693                                 this.globalScope.declareIdentifier(symbol, token);
 694                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 695                             } else {
 696                                 //println("undeclared")
 697                             }
 698
 699
 700                         } else {
 701                             //println("<B>++</B>");
 702                             token.identifier = identifier;
 703                             identifier.refcount++;
 704                         }
 705
 706                     }
 707                     break;
 708
 709
 710
 711
 712                     //println("<B>EID</B>");
 713                  case 'KEYW':
 714
 715                     if (token.name == "FUNCTION") {
 716
 717                         this.parseFunctionDeclaration();
 718                         break;
 719                     }
 720
 721
 722
 723                     symbol = token.data;
 724                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 725
 726                         if (symbol == "eval") {
 727                             if (this.ts.look(-1).type == 'COMM') {
 728                                 // look for eval:var:noreplace\n
 729                                 var _t = this;
 730                                 this.ts.look(-1).data.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 731                                     var hi = _t.getIdentifier(a, currentScope);
 732                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 733                                     if (hi) {
 734                                       //  println("PROTECT "+a+" from munge");
 735                                         hi.toMunge = false;
 736                                     }
 737
 738
 739                                 });
 740
 741                             } else {
 742                                 this.protectScopeFromObfuscation(currentScope);
 743                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 744                             }
 745
 746
 747                         }
 748                         break;
 749                     }
 750
 751             }
 752             if (!this.ts.nextTok()) break;
 753         }
 754         print(scopeIndent + "<< EXIT EXPRESSION");
 755         this.expN--;
 756     },
 757
 758
 759     parseCatch : function() {
 760
 761         var symbol;
 762         var token;
 763         var currentScope;
 764         var identifier;
 765
 766         //token = getToken(-1);
 767         //assert token.getType() == Token.CATCH;
 768         token = this.ts.nextTok();
 769         //assert token.getType() == Token.LP; (
 770         token = this.ts.nextTok();
 771         //assert token.getType() == Token.NAME;
 772
 773         symbol = token.data;
 774         currentScope = this.scopes[this.scopes.length-1];
 775
 776         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 777             // We must declare the exception identifier in the containing function
 778             // scope to avoid errors related to the obfuscation process. No need to
 779             // display a warning if the symbol was already declared here...
 780             currentScope.declareIdentifier(symbol, token);
 781         } else {
 782             //?? why inc the refcount?? - that should be set when building the tree???
 783             identifier = this.getIdentifier(symbol, currentScope);
 784             identifier.refcount++;
 785         }
 786
 787         token = this.ts.nextTok();
 788         //assert token.getType() == Token.RP; // )
 789     },
 790
 791     parseFunctionDeclaration : function()
 792     {
 793         //print("PARSE FUNCTION");
 794         var symbol;
 795         var token;
 796         var currentScope  = false;
 797         var fnScope = false;
 798         var identifier;
 799         var b4braceNesting = this.braceNesting + 0;
 800
 801         //this.logR("<B>PARSING FUNCTION</B>");
 802         currentScope = this.scopes[this.scopes.length-1];
 803
 804         token = this.ts.nextTok();
 805         if (token.type == "NAME") {
 806             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 807                 // Get the name of the function and declare it in the current scope.
 808                 symbol = token.data;
 809                 if (currentScope.getIdentifier(symbol) != false) {
 810                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 811                 }
 812                 currentScope.declareIdentifier(symbol,token);
 813             }
 814             token =  this.ts.nextTok();
 815         }
 816
 817         //assert token.getType() == Token.LP;
 818         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 819             fnScope = new Scope(this.braceNesting, currentScope, token.n, '');
 820
 821             //println("STORING SCOPE" + this.ts.cursor);
 822
 823             this.indexedScopes[this.ts.cursor] = fnScope;
 824
 825         } else {
 826             //qln("FETCHING SCOPE" + this.ts.cursor);
 827             fnScope = this.indexedScopes[this.ts.cursor];
 828
 829         }
 830
 831         // Parse function arguments.
 832         var argpos = 0;
 833         while (this.ts.lookTok().data != ')') { //(token = consumeToken()).getType() != Token.RP) {
 834             token = this.ts.nextTok();
 835            // print ("FUNC ARGS: " + token.toString())
 836             //assert token.getType() == Token.NAME ||
 837             //        token.getType() == Token.COMMA;
 838             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 839                 symbol = token.data;
 840                 identifier = fnScope.declareIdentifier(symbol,token);
 841                 if (symbol == "$super" && argpos == 0) {
 842                     // Exception for Prototype 1.6...
 843                     identifier.preventMunging();
 844                 }
 845                 argpos++;
 846             }
 847         }
 848
 849         token = this.ts.nextTok();
 850         //print(token.toString());
 851         // assert token.getType() == Token.LC;
 852         this.braceNesting++;
 853
 854         token = this.ts.nextTok();
 855         //print(token.toString());
 856
 857
 858         this.parseScope(fnScope);
 859         // now pop it off the stack!!!
 860
 861         this.braceNesting = b4braceNesting;
 862         //print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 863         //print("ENDFN 0: " + this.ts.lookTok(0).toString());
 864         //print("ENDFN 1: " + this.ts.lookTok(1).toString());
 865     },
 866
 867     protectScopeFromObfuscation : function(scope) {
 868             //assert scope != null;
 869
 870         if (scope == this.globalScope) {
 871             // The global scope does not get obfuscated,
 872             // so we don't need to worry about it...
 873             return;
 874         }
 875
 876         // Find the highest local scope containing the specified scope.
 877         while (scope && scope.parent != this.globalScope) {
 878             scope = scope.parent;
 879         }
 880
 881         //assert scope.getParentScope() == globalScope;
 882         scope.preventMunging();
 883     },
 884
 885     getIdentifier: function(symbol, scope) {
 886         var identifier;
 887         while (scope != false) {
 888             identifier = scope.getIdentifier(symbol);
 889             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 890             if (identifier) {
 891                 return identifier;
 892             }
 893             scope = scope.parent;
 894         }
 895         return false;
 896     }
 897 };