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
 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                     //println("<i>"+token.data+"</i>");
 317                      var bn = this.braceNesting;
 318                     this.parseFunctionDeclaration();
 319                      this.braceNesting = bn;
 320                     break;
 321
 322                 case "PUNC.LEFT_CURLY": // {
 323                     //println("<i>"+token.data+"</i>");
 324                     isObjectLitAr.push(false);
 325                     this.braceNesting++;
 326
 327                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 328                     break;
 329
 330                 case "PUNC.RIGHT_CURLY": // }
 331                     //println("<i>"+token.data+"</i>");
 332                     this.braceNesting--;
 333                     isObjectLitAr.pop();
 334                     //print(">>>>>> OBJLIT POP"+ this.braceNesting);
 335                         //assert braceNesting >= scope.getBra ceNesting();
 336
 337                     if (this.braceNesting < expressionBraceNesting) {
 338                         var ls = this.scopes.pop();
 339                         ls.getUsedSymbols();
 340                         // eat symbol if we are currently at {
 341                         if (this.ts.look(0).data == '{') {
 342                             this.ts.nextTok();
 343                         }
 344
 345                         print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 346                         return;
 347                     }
 348                     break;
 349
 350                 case "KEYW.WITH":
 351                     //println("<i>"+token.data+"</i>");
 352                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 353                         // Inside a 'with' block, it is impossible to figure out
 354                         // statically whether a symbol is a local variable or an
 355                         // object member. As a consequence, the only thing we can
 356                         // do is turn the obfuscation off for the highest scope
 357                         // containing the 'with' block.
 358                         this.protectScopeFromObfuscation(scope);
 359                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 360                     }
 361                     break;
 362
 363                 case "KEYW.CATCH":
 364                     //println("<i>"+token.data+"</i>");
 365                     this.parseCatch();
 366                     break;
 367                 /*
 368                 case Token.SPECIALCOMMENT:
 369                         if (mode == BUILDING_SYMBOL_TREE) {
 370                             protectScopeFromObfuscation(scope);
 371                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 372                         }
 373                         break;
 374                 */
 375
 376                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 377                 case "STRN.SINGLE_QUOTE":
 378                     //println("<i>"+token.data+"</i>");
 379                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 380                         // then we are in an object lit.. -> we need to flag the brace as such...
 381                         isObjectLitAr.pop();
 382                         isObjectLitAr.push(true);
 383                         //print(">>>>>> OBJLIT REPUSH(true)");
 384                     }
 385                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 386
 387                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 388                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 389                         // see if we can replace..
 390                         // remove the quotes..
 391                         // should do a bit more checking!!!! (what about wierd char's in the string..
 392                         var str = token.data.substring(1,token.data.length-1);
 393                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 394                             token.outData = str;
 395                         }
 396
 397
 398
 399                     }
 400
 401
 402
 403                     break;
 404
 405                 case "NAME.NAME":
 406
 407                     //print("DEAL WITH NAME:");
 408                     // got identifier..
 409
 410                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 411                     if ((this.ts.lookTok(-1).data == "{") && (this.ts.lookTok(1).data == ":")) {
 412                         isObjectLitAr.pop();
 413                         isObjectLitAr.push(true);
 414                         //print(">>>>>> OBJLIT REPUSH(true)");
 415                         //println("<i>"+token.data+"</i>");
 416                         break;
 417                     }
 418                    // print("DEAL WITH obj lit:");
 419                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 420
 421                     if (isInObjectLitAr && (this.ts.lookTok(1).data == ":") && (this.ts.lookTok(-1).data == ",")) {
 422                         // skip, it's an object lit key..
 423                         //println("<i>"+token.data+"</i>");
 424                         break;
 425                     }
 426
 427
 428                     // skip anyting with "." before it..!!
 429
 430                     if (this.ts.lookTok(-1).data == ".") {
 431                         // skip, it's an object prop.
 432                         //println("<i>"+token.data+"</i>");
 433                         break;
 434                     }
 435                     //print("SYMBOL: " + token.toString());
 436
 437                     symbol = token.data;
 438                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 439
 440                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 441
 442                         //print ("MUNGE?" + symbol);
 443
 444                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 445
 446                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 447                         identifier = this.getIdentifier(symbol, scope);
 448
 449                         if (identifier == false) {
 450 // BUG!find out where builtin is defined...
 451                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 452                                 // Here, we found an undeclared and un-namespaced symbol that is
 453                                 // 3 characters or less in length. Declare it in the global scope.
 454                                 // We don't need to declare longer symbols since they won't cause
 455                                 // any conflict with other munged symbols.
 456                                 this.globalScope.declareIdentifier(symbol, token);
 457                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 458                             }
 459
 460                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 461                         } else {
 462                             token.identifier = identifier;
 463                             identifier.refcount++;
 464                         }
 465                     }
 466
 467                     break;
 468                     //println("<B>SID</B>");
 469                 default:
 470                     if (token.type != 'KEYW') {
 471                         break;
 472                     }
 473                    // print("Check eval:");
 474
 475                     symbol = token.data;
 476
 477                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 478
 479                         if (symbol == "eval") {
 480                             // look back one and see if we can find a comment!!!
 481                             if (this.ts.look(-1).type == "COMM") {
 482                                 // look for eval:var:noreplace\n
 483                                 var _t = this;
 484                                 this.ts.look(-1).data.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 485
 486                                     var hi = _t.getIdentifier(a, scope);
 487                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 488                                     if (hi) {
 489                                      //   println("PROTECT "+a+" from munge");
 490                                         hi.toMunge = false;
 491                                     }
 492
 493                                 });
 494
 495
 496                             } else {
 497
 498
 499                                 this.protectScopeFromObfuscation(scope);
 500                                 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);
 501                             }
 502
 503                         }
 504
 505                     }
 506                     break;
 507
 508
 509             } // end switch
 510
 511
 512             //print("parseScope TOK : " + token.toString());
 513             token = this.ts.nextTok();
 514             //if (this.ts.nextT()) break;
 515
 516         }
 517         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 518     },
 519
 520     expN : 0,
 521     parseExpression : function() {
 522
 523         // Parse the expression until we encounter a comma or a semi-colon
 524         // in the same brace nesting, bracket nesting and paren nesting.
 525         // Parse functions if any...
 526         //println("<i>EXP</i><BR/>");
 527         !this.debug || print("PARSE EXPR");
 528         this.expN++;
 529
 530         // for printing stuff..
 531
 532
 533
 534         var symbol;
 535         var token;
 536         var currentScope;
 537         var identifier;
 538
 539         var expressionBraceNesting = this.braceNesting + 0;
 540         var bracketNesting = 0;
 541         var parensNesting = 0;
 542         var isInObjectLitAr;
 543         var isObjectLitAr = [ false ];
 544
 545         currentScope = this.scopes[this.scopes.length-1];
 546
 547         var scopeIndent = '';
 548         this.scopes.forEach(function() {
 549             scopeIndent += '   ';
 550         });
 551         //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 552         while (token = this.ts.lookTok()) {
 553
 554
 555
 556            /*
 557             // moved out of loop?
 558            currentScope = this.scopes[this.scopes.length-1];
 559
 560             var scopeIndent = '';
 561             this.scopes.forEach(function() {
 562                 scopeIndent += '   ';
 563             });
 564            */
 565
 566            //this.dumpToken(token,  this.scopes, this.braceNesting );
 567            //print('EXP' + this.expN + ':' + token.toString());
 568
 569
 570             //println("<i>"+token.data+"</i>");
 571             //this.log("EXP:" + token.data);
 572             switch (token.type) {
 573                 case 'PUNC':
 574                     switch(token.data) {
 575
 576                         case ';':
 577                         case ',':
 578                             if (this.braceNesting == expressionBraceNesting &&
 579                                     bracketNesting == 0 &&
 580                                     parensNesting == 0) {
 581                                 print(scopeIndent + "<< EXIT EXPRESSION");
 582                                 this.expN--;
 583                                 return;
 584                             }
 585                             break;
 586
 587
 588
 589                         case '{': //Token.LC:
 590                             isObjectLitAr.push(false);
 591
 592                             this.braceNesting++;
 593                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 594                             break;
 595
 596                         case '}': //Token.RC:
 597                             this.braceNesting--;
 598                             isObjectLitAr.pop();
 599                             //print(">>>>> EXP POP" + this.braceNesting);
 600                            // assert braceNesting >= expressionBraceNesting;
 601                             break;
 602
 603                         case '[': //Token.LB:
 604                             bracketNesting++;
 605                             break;
 606
 607                         case ']': //Token.RB:
 608                             bracketNesting--;
 609                             break;
 610
 611                         case '(': //Token.LP:
 612                             parensNesting++;
 613                             break;
 614
 615                         case ')': //Token.RP:
 616                             parensNesting--;
 617                             break;
 618                     }
 619                     break;
 620
 621                 case 'STRN': // used for object lit detection..
 622                     if (this.ts.lookTok(-1).data == "{" && this.ts.lookTok(1).data == ":" ) {
 623                         // then we are in an object lit.. -> we need to flag the brace as such...
 624                         isObjectLitAr.pop();
 625                         isObjectLitAr.push(true);
 626                         //print(">>>>> EXP PUSH(true)");
 627                     }
 628
 629
 630
 631                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 632                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ":"  &&
 633                         ( this.ts.lookTok(-1).data == "{"  ||  this.ts.lookTok(-1).data == "," )) {
 634                         // see if we can replace..
 635                         // remove the quotes..
 636                         var str = token.data.substring(1,token.data.length-1);
 637                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 638                             token.outData = str;
 639                         }
 640
 641
 642
 643                     }
 644
 645                     break;
 646
 647
 648
 649                 case 'NAME':
 650
 651                     symbol = token.data;
 652                     //print("in NAME = " + token.toString());
 653                     //print("in NAME 0: " + this.ts.look(0).toString());
 654                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 655                     if (this.ts.look(0).data == "{"  && this.ts.lookTok(2).data == ":") {
 656                         // then we are in an object lit.. -> we need to flag the brace as such...
 657                         isObjectLitAr.pop();
 658                         isObjectLitAr.push(true);
 659                          //print(">>>>> EXP  PUSH(true)");
 660                         break;
 661                     }
 662
 663                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 664                     //print ("isInObjectLitAr : " + isInObjectLitAr + ' ' + token.toString());
 665
 666                     if (isInObjectLitAr && this.ts.lookTok(0).data == "," && this.ts.lookTok(2).data == ":") {
 667                         break;
 668                     }
 669                     //print(this.ts.lookTok(0).data);
 670                     if (this.ts.lookTok(0).data == ".") {
 671                         //skip '.'
 672                         break;
 673                     }
 674
 675                      if (this.mode == 'PASS2_SYMBOL_TREE') {
 676
 677                         identifier = this.getIdentifier(symbol, currentScope);
 678                         //println("<B>??</B>");
 679                         if (identifier == false) {
 680
 681                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 682                                 // Here, we found an undeclared and un-namespaced symbol that is
 683                                 // 3 characters or less in length. Declare it in the global scope.
 684                                 // We don't need to declare longer symbols since they won't cause
 685                                 // any conflict with other munged symbols.
 686                                 this.globalScope.declareIdentifier(symbol, token);
 687                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 688                             } else {
 689                                 //println("undeclared")
 690                             }
 691
 692
 693                         } else {
 694                             //println("<B>++</B>");
 695                             token.identifier = identifier;
 696                             identifier.refcount++;
 697                         }
 698
 699                     }
 700                     break;
 701
 702
 703
 704
 705                     //println("<B>EID</B>");
 706                  case 'KEYW':
 707
 708                     if (token.name == "FUNCTION") {
 709
 710                         this.parseFunctionDeclaration();
 711                         break;
 712                     }
 713
 714
 715
 716                     symbol = token.data;
 717                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 718
 719                         if (symbol == "eval") {
 720                             if (this.ts.look(-1).type == 'COMM') {
 721                                 // look for eval:var:noreplace\n
 722                                 var _t = this;
 723                                 this.ts.look(-1).data.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 724                                     var hi = _t.getIdentifier(a, currentScope);
 725                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 726                                     if (hi) {
 727                                       //  println("PROTECT "+a+" from munge");
 728                                         hi.toMunge = false;
 729                                     }
 730
 731
 732                                 });
 733
 734                             } else {
 735                                 this.protectScopeFromObfuscation(currentScope);
 736                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 737                             }
 738
 739
 740                         }
 741                         break;
 742                     }
 743
 744             }
 745             if (!this.ts.nextTok()) break;
 746         }
 747         print(scopeIndent + "<< EXIT EXPRESSION");
 748         this.expN--;
 749     },
 750
 751
 752     parseCatch : function() {
 753
 754         var symbol;
 755         var token;
 756         var currentScope;
 757         var identifier;
 758
 759         //token = getToken(-1);
 760         //assert token.getType() == Token.CATCH;
 761         token = this.ts.nextTok();
 762         //assert token.getType() == Token.LP; (
 763         token = this.ts.nextTok();
 764         //assert token.getType() == Token.NAME;
 765
 766         symbol = token.data;
 767         currentScope = this.scopes[this.scopes.length-1];
 768
 769         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 770             // We must declare the exception identifier in the containing function
 771             // scope to avoid errors related to the obfuscation process. No need to
 772             // display a warning if the symbol was already declared here...
 773             currentScope.declareIdentifier(symbol, token);
 774         } else {
 775             //?? why inc the refcount?? - that should be set when building the tree???
 776             identifier = this.getIdentifier(symbol, currentScope);
 777             identifier.refcount++;
 778         }
 779
 780         token = this.ts.nextTok();
 781         //assert token.getType() == Token.RP; // )
 782     },
 783
 784     parseFunctionDeclaration : function()
 785     {
 786         //print("PARSE FUNCTION");
 787         var symbol;
 788         var token;
 789         var currentScope  = false;
 790         var fnScope = false;
 791         var identifier;
 792         var b4braceNesting = this.braceNesting + 0;
 793
 794         //this.logR("<B>PARSING FUNCTION</B>");
 795         currentScope = this.scopes[this.scopes.length-1];
 796
 797         token = this.ts.nextTok();
 798         if (token.type == "NAME") {
 799             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 800                 // Get the name of the function and declare it in the current scope.
 801                 symbol = token.data;
 802                 if (currentScope.getIdentifier(symbol) != false) {
 803                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 804                 }
 805                 currentScope.declareIdentifier(symbol,token);
 806             }
 807             token =  this.ts.nextTok();
 808         }
 809
 810         //assert token.getType() == Token.LP;
 811         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 812             fnScope = new Scope(this.braceNesting, currentScope, token.n, '');
 813
 814             //println("STORING SCOPE" + this.ts.cursor);
 815
 816             this.indexedScopes[this.ts.cursor] = fnScope;
 817
 818         } else {
 819             //qln("FETCHING SCOPE" + this.ts.cursor);
 820             fnScope = this.indexedScopes[this.ts.cursor];
 821
 822         }
 823
 824         // Parse function arguments.
 825         var argpos = 0;
 826         while (this.ts.lookTok().data != ')') { //(token = consumeToken()).getType() != Token.RP) {
 827             token = this.ts.nextTok();
 828            // print ("FUNC ARGS: " + token.toString())
 829             //assert token.getType() == Token.NAME ||
 830             //        token.getType() == Token.COMMA;
 831             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 832                 symbol = token.data;
 833                 identifier = fnScope.declareIdentifier(symbol,token);
 834                 if (symbol == "$super" && argpos == 0) {
 835                     // Exception for Prototype 1.6...
 836                     identifier.preventMunging();
 837                 }
 838                 argpos++;
 839             }
 840         }
 841
 842         token = this.ts.nextTok();
 843         //print(token.toString());
 844         // assert token.getType() == Token.LC;
 845         this.braceNesting++;
 846
 847         token = this.ts.nextTok();
 848         //print(token.toString());
 849
 850
 851         this.parseScope(fnScope);
 852         // now pop it off the stack!!!
 853
 854         this.braceNesting = b4braceNesting;
 855         //print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 856         //print("ENDFN 0: " + this.ts.lookTok(0).toString());
 857         //print("ENDFN 1: " + this.ts.lookTok(1).toString());
 858     },
 859
 860     protectScopeFromObfuscation : function(scope) {
 861             //assert scope != null;
 862
 863         if (scope == this.globalScope) {
 864             // The global scope does not get obfuscated,
 865             // so we don't need to worry about it...
 866             return;
 867         }
 868
 869         // Find the highest local scope containing the specified scope.
 870         while (scope && scope.parent != this.globalScope) {
 871             scope = scope.parent;
 872         }
 873
 874         //assert scope.getParentScope() == globalScope;
 875         scope.preventMunging();
 876     },
 877
 878     getIdentifier: function(symbol, scope) {
 879         var identifier;
 880         while (scope != false) {
 881             identifier = scope.getIdentifier(symbol);
 882             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 883             if (identifier) {
 884                 return identifier;
 885             }
 886             scope = scope.parent;
 887         }
 888         return false;
 889     }
 890 };