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 ScopeParser = function(ts) {
  12     this.ts = ts; // {TokenStream}
  13     this.warnings = [];
  14     this.scopes = [];
  15     this.indexedScopes = {};
  16     this.timer = new Date() * 1;
  17     this.debug = false;
  18 }
  19
  20 // list of keywords that should not be used in object literals.
  21 ScopeParser.idents = [
  22         "break",
  23         "case",
  24         "continue",
  25         "default",
  26         "delete",
  27         "do",
  28         "else",
  29         "export",
  30         "false",
  31         "for",
  32         "function",
  33         "if",
  34         "import",
  35         "in",
  36         "new",
  37         "null",
  38         "return",
  39         "switch",
  40         "this",
  41         "true",
  42         "typeof",
  43         "var",
  44         "void",
  45         "while",
  46         "with",
  47
  48         "catch",
  49         "class",
  50         "const",
  51         "debugger",
  52         "enum",
  53         "extends",
  54         "finally",
  55         "super",
  56         "throw",
  57         "try",
  58
  59         "abstract",
  60         "boolean",
  61         "byte",
  62         "char",
  63         "double",
  64         "final",
  65         "float",
  66         "goto",
  67         "implements",
  68         "instanceof",
  69         "int",
  70         "interface",
  71         "long",
  72         "native",
  73         "package",
  74         "private",
  75         "protected",
  76         "public",
  77         "short",
  78         "static",
  79         "synchronized",
  80         "throws",
  81         "transient",
  82                 "include",
  83                 "undefined"
  84 ];
  85
  86
  87 ScopeParser.prototype = {
  88     timer: 0,
  89     timerPrint: function (str) {
  90         var ntime = new Date() * 1;
  91         var tdif =  ntime -this.timer;
  92         this.timer = ntime;
  93         var pref = '';
  94         if (tdif > 100) { //slower ones..
  95             pref = '***';
  96         }
  97         println(pref+'['+tdif+']'+str);
  98
  99     },
 100     warn: function(s) {
 101         print('****************' + s);
 102         this.warnings.push(s);
 103         //println("WARNING:" + htmlescape(s) + "<BR>");
 104     },
 105     // defaults should not be initialized here =- otherwise they get duped on new, rather than initalized..
 106     warnings : false,
 107     ts : false,
 108     scopes : false,
 109     global : false,
 110     mode : "", //"BUILDING_SYMBOL_TREE",
 111     braceNesting : 0,
 112     indexedScopes : false,
 113     munge: true,
 114
 115
 116
 117
 118
 119     buildSymbolTree : function()
 120     {
 121         //println("<PRE>");
 122
 123         this.ts.rewind();
 124         this.braceNesting = 0;
 125         this.scopes = [];
 126
 127
 128
 129
 130         this.globalScope = new  Scope(-1, false, -1, '');
 131         indexedScopes = { 0 : this.globalScope };
 132
 133         this.mode = 'BUILDING_SYMBOL_TREE';
 134         this.parseScope(this.globalScope);
 135
 136         print("---------------END PASS 1 ---------------- ");
 137
 138     },
 139     mungeSymboltree : function()
 140     {
 141
 142         if (!this.munge) {
 143             return;
 144         }
 145
 146         // One problem with obfuscation resides in the use of undeclared
 147         // and un-namespaced global symbols that are 3 characters or less
 148         // in length. Here is an example:
 149         //
 150         //     var declaredGlobalVar;
 151         //
 152         //     function declaredGlobalFn() {
 153         //         var localvar;
 154         //         localvar = abc; // abc is an undeclared global symbol
 155         //     }
 156         //
 157         // In the example above, there is a slim chance that localvar may be
 158         // munged to 'abc', conflicting with the undeclared global symbol
 159         // abc, creating a potential bug. The following code detects such
 160         // global symbols. This must be done AFTER the entire file has been
 161         // parsed, and BEFORE munging the symbol tree. Note that declaring
 162         // extra symbols in the global scope won't hurt.
 163         //
 164         // Note: Since we go through all the tokens to do this, we also use
 165         // the opportunity to count how many times each identifier is used.
 166
 167         this.ts.rewind();
 168         this.braceNesting = 0;
 169         this.scopes= [];
 170         this.mode = 'PASS2_SYMBOL_TREE';
 171
 172         //println("MUNGING?");
 173
 174         this.parseScope(this.globalScope);
 175         this.globalScope.munge();
 176     },
 177
 178
 179     log : function(str)
 180     {
 181           //println("<B>LOG:</B>" + htmlescape(str) + "<BR/>\n");
 182     },
 183     logR : function(str)
 184     {
 185             //println("<B>LOG:</B>" + str + "<BR/>");
 186     },
 187
 188
 189
 190
 191
 192
 193     parseScope : function(scope) // parse a token stream..
 194     {
 195         //this.timerPrint("parseScope EnterScope");
 196         print(">>> ENTER SCOPE" + this.scopes.length);
 197         var symbol;
 198         var token;
 199
 200         var identifier;
 201
 202         var expressionBraceNesting = this.braceNesting;
 203         var bracketNesting = 0;
 204         var parensNesting = 0;
 205
 206         var isObjectLitAr = [ false ];
 207         var isInObjectLitAr;
 208         this.scopes.push(scope);
 209         token = this.ts.lookTok(1);
 210         while (token) {
 211           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 212
 213             !this.debug|| print(token.type + '.' + token.name+ ":" + token.data);
 214             switch(token.type + '.' + token.name) {
 215                 case "KEYW.VAR":
 216                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 217
 218                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 219                     while (true) {
 220                         token = this.ts.nextTok();
 221                         !this.debug|| print( token.toString());
 222
 223                         if (!token) { // can return false at EOF!
 224                             break;
 225                         }
 226                         if (token.name == "VAR") { // kludge..
 227                             continue;
 228                         }
 229                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 230                         if (token.type !="NAME") {
 231                             print(token.toString());
 232                             print( "var without ident");
 233                             Seed.quit()
 234                         }
 235
 236
 237                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 238                             identifier = scope.getIdentifier(token.data) ;
 239
 240                             if (identifier == false) {
 241                                 scope.declareIdentifier(token.data, token);
 242                             } else {
 243                                 token.identifier = identifier;
 244                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 245                             }
 246                         }
 247
 248                         token = this.ts.nextTok();
 249                         !this.debug|| print(token.toString());
 250                         /*
 251                         assert token.getType() == Token.SEMI ||
 252                                 token.getType() == Token.ASSIGN ||
 253                                 token.getType() == Token.COMMA ||
 254                                 token.getType() == Token.IN;
 255                         */
 256                         if (token.name == "IN") {
 257                             break;
 258                         } else {
 259                             this.parseExpression();
 260                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 261
 262                             token = this.ts.lookTok(1);
 263                             !this.debug|| print("AFTER EXP: " + token.toString());
 264                             if (token.data == ';') {
 265                                 break;
 266                             }
 267                         }
 268                     }
 269                     break;
 270                 case "KEYW.FUNCTION":
 271                     //println("<i>"+token.data+"</i>");
 272                     this.parseFunctionDeclaration();
 273                     break;
 274
 275                 case "PUNC.LEFT_CURLY": // {
 276                     //println("<i>"+token.data+"</i>");
 277                     isObjectLitAr.push(false);
 278                     print(">>>>>> OBJLIT PUSH(false)");
 279                     this.braceNesting++;
 280                     break;
 281
 282                 case "PUNC.RIGHT_CURLY": // }
 283                     //println("<i>"+token.data+"</i>");
 284                     this.braceNesting--;
 285                     isObjectLitAr.pop();
 286                     print(">>>>>> OBJLIT POP"+ this.braceNesting);
 287                         //assert braceNesting >= scope.getBra ceNesting();
 288
 289                     if (this.braceNesting == expressionBraceNesting) {
 290                         var ls = this.scopes.pop();
 291                         ls.getUsedSymbols();
 292                         print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 293                         return;
 294                     }
 295                     break;
 296
 297                 case "KEYW.WITH":
 298                     //println("<i>"+token.data+"</i>");
 299                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 300                         // Inside a 'with' block, it is impossible to figure out
 301                         // statically whether a symbol is a local variable or an
 302                         // object member. As a consequence, the only thing we can
 303                         // do is turn the obfuscation off for the highest scope
 304                         // containing the 'with' block.
 305                         this.protectScopeFromObfuscation(scope);
 306                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 307                     }
 308                     break;
 309
 310                 case "KEYW.CATCH":
 311                     //println("<i>"+token.data+"</i>");
 312                     this.parseCatch();
 313                     break;
 314                 /*
 315                 case Token.SPECIALCOMMENT:
 316                         if (mode == BUILDING_SYMBOL_TREE) {
 317                             protectScopeFromObfuscation(scope);
 318                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 319                         }
 320                         break;
 321                 */
 322
 323                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 324                 case "STRN.SINGLE_QUOTE":
 325                     //println("<i>"+token.data+"</i>");
 326                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 327                         // then we are in an object lit.. -> we need to flag the brace as such...
 328                         isObjectLitAr.pop();
 329                         isObjectLitAr.push(true);
 330                         print(">>>>>> OBJLIT PUSH(true)");
 331                     }
 332                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 333
 334                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 335                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 336                         // see if we can replace..
 337                         // remove the quotes..
 338                         // should do a bit more checking!!!! (what about wierd char's in the string..
 339                         var str = token.data.substring(1,token.data.length-1);
 340                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 341                             token.outData = str;
 342                         }
 343
 344
 345
 346                     }
 347
 348
 349
 350                     break;
 351
 352                 case "NAME.NAME":
 353
 354                     //print("DEAL WITH NAME:");
 355                     // got identifier..
 356
 357                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 358                     if ((this.ts.lookTok(-1).data == "{") && (this.ts.lookTok(1).data == ":")) {
 359                         isObjectLitAr.pop();
 360                         isObjectLitAr.push(true);
 361                         print(">>>>>> OBJLIT PUSH(true)");
 362                         //println("<i>"+token.data+"</i>");
 363                         break;
 364                     }
 365                    // print("DEAL WITH obj lit:");
 366                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 367
 368                     if (isInObjectLitAr && (this.ts.lookTok(1).data == ":") && (this.ts.lookTok(-1).data == ",")) {
 369                         // skip, it's an object lit key..
 370                         //println("<i>"+token.data+"</i>");
 371                         break;
 372                     }
 373
 374
 375                     // skip anyting with "." before it..!!
 376
 377                     if (this.ts.lookTok(-1).data == ".") {
 378                         // skip, it's an object prop.
 379                         //println("<i>"+token.data+"</i>");
 380                         break;
 381                     }
 382                     symbol = token.data;
 383                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 384
 385                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 386
 387                         //print ("MUNGE?" + symbol);
 388
 389                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 390
 391                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 392                         identifier = this.getIdentifier(symbol, scope);
 393
 394                         if (identifier == false) {
 395 // BUG!find out where builtin is defined...
 396                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 397                                 // Here, we found an undeclared and un-namespaced symbol that is
 398                                 // 3 characters or less in length. Declare it in the global scope.
 399                                 // We don't need to declare longer symbols since they won't cause
 400                                 // any conflict with other munged symbols.
 401                                 this.globalScope.declareIdentifier(symbol, token);
 402                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 403                             }
 404
 405                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 406                         } else {
 407                             token.identifier = identifier;
 408                             identifier.refcount++;
 409                         }
 410                     }
 411
 412                     break;
 413                     //println("<B>SID</B>");
 414                 default:
 415                     if (token.type != 'KEYW') {
 416                         break;
 417                     }
 418                    // print("Check eval:");
 419
 420                     symbol = token.data;
 421
 422                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 423
 424                         if (symbol == "eval") {
 425                             // look back one and see if we can find a comment!!!
 426                             if (this.ts.look(-1).type == "COMM") {
 427                                 // look for eval:var:noreplace\n
 428                                 var _t = this;
 429                                 this.ts.look(-1).data.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 430
 431                                     var hi = _t.getIdentifier(a, scope);
 432                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 433                                     if (hi) {
 434                                      //   println("PROTECT "+a+" from munge");
 435                                         hi.toMunge = false;
 436                                     }
 437
 438                                 });
 439
 440
 441                             } else {
 442
 443
 444                                 this.protectScopeFromObfuscation(scope);
 445                                 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);
 446                             }
 447
 448                         }
 449
 450                     }
 451                     break;
 452
 453
 454             } // end switch
 455
 456
 457             //this.timerPrint("parseScope TOK : " + token.toString());
 458             token = this.ts.nextTok();
 459             //if (this.ts.nextT()) break;
 460
 461         }
 462         print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 463     },
 464
 465
 466     parseExpression : function() {
 467
 468         // Parse the expression until we encounter a comma or a semi-colon
 469         // in the same brace nesting, bracket nesting and paren nesting.
 470         // Parse functions if any...
 471         //println("<i>EXP</i><BR/>");
 472         !this.debug || print("PARSE EXPR");
 473         var symbol;
 474         var token;
 475         var currentScope;
 476         var identifier;
 477
 478         var expressionBraceNesting = this.braceNesting;
 479         var bracketNesting = 0;
 480         var parensNesting = 0;
 481         var isInObjectLitAr;
 482         var isObjectLitAr = [ false ];
 483         while (token = this.ts.lookTok()) {
 484
 485
 486
 487             currentScope = this.scopes[this.scopes.length-1];
 488
 489             //println("<i>"+token.data+"</i>");
 490             !this.debug|| print ("EXP" + token.toString());
 491             switch (token.type) {
 492                 case 'PUNC':
 493                     switch(token.data) {
 494
 495                         case ';':
 496                         case ',':
 497                             if (this.braceNesting == expressionBraceNesting &&
 498                                     bracketNesting == 0 &&
 499                                     parensNesting == 0) {
 500
 501                                 return;
 502                             }
 503                             break;
 504
 505
 506
 507                         case '{': //Token.LC:
 508                             isObjectLitAr.push(false);
 509                             print(">>>>> OBJ PUSH(false)");
 510                             this.braceNesting++;
 511                             break;
 512
 513                         case '}': //Token.RC:
 514                             this.braceNesting--;
 515                             isObjectLitAr.pop();
 516                             print(">>>>> OBJ POP");
 517                            // assert braceNesting >= expressionBraceNesting;
 518                             break;
 519
 520                         case '[': //Token.LB:
 521                             bracketNesting++;
 522                             break;
 523
 524                         case ']': //Token.RB:
 525                             bracketNesting--;
 526                             break;
 527
 528                         case '(': //Token.LP:
 529                             parensNesting++;
 530                             break;
 531
 532                         case ')': //Token.RP:
 533                             parensNesting--;
 534                             break;
 535                     }
 536                     break;
 537
 538                 case 'STRN': // used for object lit detection..
 539                     if (this.ts.lookTok(-1).data == "{" && this.ts.lookTok(1).data == ":" ) {
 540                         // then we are in an object lit.. -> we need to flag the brace as such...
 541                         isObjectLitAr.pop();
 542                         isObjectLitAr.push(true);
 543                         print(">>>>> OBJ PUSH(true)");
 544                     }
 545
 546
 547
 548                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 549                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ":"  &&
 550                         ( this.ts.lookTok(-1).data == "{"  ||  this.ts.lookTok(-1).data == "," )) {
 551                         // see if we can replace..
 552                         // remove the quotes..
 553                         var str = token.data.substring(1,token.data.length-1);
 554                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 555                             token.outData = str;
 556                         }
 557
 558
 559
 560                     }
 561
 562                     break;
 563
 564
 565
 566                 case 'NAME':
 567
 568                     symbol = token.data;
 569                     if (this.ts.lookTok(-1).data == "{"  && this.ts.lookTok(1).data == ":") {
 570                         // then we are in an object lit.. -> we need to flag the brace as such...
 571                         isObjectLitAr.pop();
 572                         isObjectLitAr.push(true);
 573                          print(">>>>> OBJ PUSH(true)");
 574                         break;
 575                     }
 576                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 577                     if (isInObjectLitAr && this.ts.lookTok(-1).data == "," && this.ts.lookTok(1).data == ":") {
 578                         break;
 579                     }
 580
 581                     if (this.ts.lookTok(-1).data == ".") {
 582                         //skip '.'
 583                         break;
 584                     }
 585
 586                      if (this.mode == 'PASS2_SYMBOL_TREE') {
 587
 588                         identifier = this.getIdentifier(symbol, currentScope);
 589                         //println("<B>??</B>");
 590                         if (identifier == false) {
 591
 592                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 593                                 // Here, we found an undeclared and un-namespaced symbol that is
 594                                 // 3 characters or less in length. Declare it in the global scope.
 595                                 // We don't need to declare longer symbols since they won't cause
 596                                 // any conflict with other munged symbols.
 597                                 this.globalScope.declareIdentifier(symbol, token);
 598                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 599                             } else {
 600                                 //println("undeclared")
 601                             }
 602
 603
 604                         } else {
 605                             //println("<B>++</B>");
 606                             token.identifier = identifier;
 607                             identifier.refcount++;
 608                         }
 609
 610                     }
 611                     break;
 612
 613
 614
 615
 616                     //println("<B>EID</B>");
 617                  case 'KEYW':
 618
 619                     if (token.name == "FUNCTION") {
 620
 621                         this.parseFunctionDeclaration();
 622                         break;
 623                     }
 624
 625
 626
 627                     symbol = token.data;
 628                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 629
 630                         if (symbol == "eval") {
 631                             if (this.ts.look(-1).type == 'COMM') {
 632                                 // look for eval:var:noreplace\n
 633                                 var _t = this;
 634                                 this.ts.look(-1).data.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 635                                     var hi = _t.getIdentifier(a, currentScope);
 636                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 637                                     if (hi) {
 638                                       //  println("PROTECT "+a+" from munge");
 639                                         hi.toMunge = false;
 640                                     }
 641
 642
 643                                 });
 644
 645                             } else {
 646                                 this.protectScopeFromObfuscation(currentScope);
 647                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 648                             }
 649
 650
 651                         }
 652                         break;
 653                     }
 654
 655             }
 656             if (!this.ts.nextTok()) break;
 657         }
 658     },
 659
 660
 661     parseCatch : function() {
 662
 663         var symbol;
 664         var token;
 665         var currentScope;
 666         var identifier;
 667
 668         //token = getToken(-1);
 669         //assert token.getType() == Token.CATCH;
 670         token = this.ts.nextTok();
 671         //assert token.getType() == Token.LP; (
 672         token = this.ts.nextTok();
 673         //assert token.getType() == Token.NAME;
 674
 675         symbol = token.data;
 676         currentScope = this.scopes[this.scopes.length-1];
 677
 678         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 679             // We must declare the exception identifier in the containing function
 680             // scope to avoid errors related to the obfuscation process. No need to
 681             // display a warning if the symbol was already declared here...
 682             currentScope.declareIdentifier(symbol, token);
 683         } else {
 684             //?? why inc the refcount?? - that should be set when building the tree???
 685             identifier = this.getIdentifier(symbol, currentScope);
 686             identifier.refcount++;
 687         }
 688
 689         token = this.ts.nextTok();
 690         //assert token.getType() == Token.RP; // )
 691     },
 692
 693     parseFunctionDeclaration : function()
 694     {
 695        // print("PARSE FUNCTION");
 696         var symbol;
 697         var token;
 698         var currentScope  = false;
 699         var fnScope = false;
 700         var identifier;
 701         //this.logR("<B>PARSING FUNCTION</B>");
 702         currentScope = this.scopes[this.scopes.length-1];
 703
 704         token = this.ts.nextTok();
 705         if (token.type == "NAME") {
 706             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 707                 // Get the name of the function and declare it in the current scope.
 708                 symbol = token.data;
 709                 if (currentScope.getIdentifier(symbol) != false) {
 710                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 711                 }
 712                 currentScope.declareIdentifier(symbol,token);
 713             }
 714             token =  this.ts.nextTok();
 715         }
 716
 717         //assert token.getType() == Token.LP;
 718         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 719             fnScope = new Scope(this.braceNesting, currentScope, token.n, '');
 720
 721             //println("STORING SCOPE" + this.ts.cursor);
 722
 723             this.indexedScopes[this.ts.cursor] = fnScope;
 724
 725         } else {
 726             //println("FETCHING SCOPE" + this.ts.cursor);
 727             fnScope = this.indexedScopes[this.ts.cursor];
 728
 729         }
 730
 731         // Parse function arguments.
 732         var argpos = 0;
 733         while (this.ts.lookTok().data != ')') { //(token = consumeToken()).getType() != Token.RP) {
 734             token = this.ts.nextTok();
 735            // print ("FUNC ARGS: " + token.toString())
 736             //assert token.getType() == Token.NAME ||
 737             //        token.getType() == Token.COMMA;
 738             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 739                 symbol = token.data;
 740                 identifier = fnScope.declareIdentifier(symbol,token);
 741                 if (symbol == "$super" && argpos == 0) {
 742                     // Exception for Prototype 1.6...
 743                     identifier.preventMunging();
 744                 }
 745                 argpos++;
 746             }
 747         }
 748
 749         token = this.ts.nextTok();
 750         // assert token.getType() == Token.LC;
 751         this.braceNesting++;
 752
 753         token = this.ts.nextTok();
 754         if (token.type == "STRN" && this.ts.lookTok(1).data == ';') {
 755             /*
 756
 757             NOT SUPPORTED YET!?!!?!
 758
 759             // This is a hint. Hints are empty statements that look like
 760             // "localvar1:nomunge, localvar2:nomunge"; They allow developers
 761             // to prevent specific symbols from getting obfuscated (some heretic
 762             // implementations, such as Prototype 1.6, require specific variable
 763             // names, such as $super for example, in order to work appropriately.
 764             // Note: right now, only "nomunge" is supported in the right hand side
 765             // of a hint. However, in the future, the right hand side may contain
 766             // other values.
 767             consumeToken();
 768             String hints = token.getValue();
 769             // Remove the leading and trailing quotes...
 770             hints = hints.substring(1, hints.length() - 1).trim();
 771             StringTokenizer st1 = new StringTokenizer(hints, ",");
 772             while (st1.hasMoreTokens()) {
 773                 String hint = st1.nextToken();
 774                 int idx = hint.indexOf(':');
 775                 if (idx <= 0 || idx >= hint.length() - 1) {
 776                     if (mode == BUILDING_SYMBOL_TREE) {
 777                         // No need to report the error twice, hence the test...
 778                         this.warn("Invalid hint syntax: " + hint, true);
 779                     }
 780                     break;
 781                 }
 782                 String variableName = hint.substring(0, idx).trim();
 783                 String variableType = hint.substring(idx + 1).trim();
 784                 if (mode == BUILDING_SYMBOL_TREE) {
 785                     fnScope.addHint(variableName, variableType);
 786                 } else if (mode == CHECKING_SYMBOL_TREE) {
 787                     identifier = fnScope.getIdentifier(variableName);
 788                     if (identifier != null) {
 789                         if (variableType.equals("nomunge")) {
 790                             identifier.preventMunging();
 791                         } else {
 792                             this.warn("Unsupported hint value: " + hint, true);
 793                         }
 794                     } else {
 795                         this.warn("Hint refers to an unknown identifier: " + hint, true);
 796                     }
 797                 }
 798             }
 799             */
 800         }
 801
 802         this.parseScope(fnScope);
 803         // now pop it off the stack!!!
 804
 805
 806
 807     },
 808
 809     protectScopeFromObfuscation : function(scope) {
 810             //assert scope != null;
 811
 812         if (scope == this.globalScope) {
 813             // The global scope does not get obfuscated,
 814             // so we don't need to worry about it...
 815             return;
 816         }
 817
 818         // Find the highest local scope containing the specified scope.
 819         while (scope && scope.parent != this.globalScope) {
 820             scope = scope.parent;
 821         }
 822
 823         //assert scope.getParentScope() == globalScope;
 824         scope.preventMunging();
 825     },
 826
 827     getIdentifier: function(symbol, scope) {
 828         var identifier;
 829         while (scope != false) {
 830             identifier = scope.getIdentifier(symbol);
 831             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 832             if (identifier) {
 833                 return identifier;
 834             }
 835             scope = scope.parent;
 836         }
 837         return false;
 838     }
 839 };