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         print ("                    ".substring(0, this.braceNesting*2) + str);
 182
 183         //println("<B>LOG:</B>" + htmlescape(str) + "<BR/>\n");
 184     },
 185     logR : function(str)
 186     {
 187             //println("<B>LOG:</B>" + str + "<BR/>");
 188     },
 189
 190
 191     dumpLine : false,
 192     dumpToken: function (tok, scope, brace) {
 193         if (this.dumpLine == false) {
 194             this.dumpLine = {
 195                 str : tok.data + ' ',
 196                 scope : scope.length,
 197                 brace : brace
 198             }
 199             return;
 200         }
 201
 202         if (this.dumpLine.scope == scope.length && this.dumpLine.brace == brace) {
 203             this.dumpLine.str +=  tok.data + ' ';
 204             if (this.dumpLine.str.length > 80 || tok.data ==';') {
 205
 206                 print(
 207                 //    (new Array(this.dumpLine.scope)).join("  ") + '|' +
 208                     (new Array(this.dumpLine.brace+1)).join("  ") + this.dumpLine.str);
 209                 this.dumpLine.str = '';
 210             }
 211             return;
 212         }
 213
 214         print(
 215           //  (new Array(this.dumpLine.scope)).join("  ") + '|' +
 216             (new Array(this.dumpLine.brace+1)).join("  ") + this.dumpLine.str);
 217
 218
 219         this.dumpLine = {
 220             str : tok.data + ' ',
 221             scope : scope.length,
 222             brace : brace
 223         }
 224
 225     },
 226
 227
 228
 229     parseScope : function(scope) // parse a token stream..
 230     {
 231         //this.timerPrint("parseScope EnterScope");
 232         //this.log(">>> ENTER SCOPE" + this.scopes.length);
 233         var symbol;
 234         var token;
 235
 236         var identifier;
 237
 238         var expressionBraceNesting = this.braceNesting + 0;
 239
 240         var parensNesting = 0;
 241
 242         var isObjectLitAr = [ false ];
 243         var isInObjectLitAr;
 244         this.scopes.push(scope);
 245
 246         var scopeIndent = '';
 247         this.scopes.forEach(function() {
 248             scopeIndent += '   ';
 249         });
 250         print(scopeIndent + ">> ENTER SCOPE");
 251
 252
 253
 254
 255         token = this.ts.lookTok(1);
 256         while (token) {
 257           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 258             //this.dumpToken(token , this.scopes, this.braceNesting);
 259             print('SCOPE:' + token.toString());
 260             //this.log(token.data);
 261             if (token.type == 'NAME') {
 262             //    print('*' + token.data);
 263             }
 264             switch(token.type + '.' + token.name) {
 265                 case "KEYW.VAR":
 266                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 267
 268
 269                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 270                     while (true) {
 271                         token = this.ts.nextTok();
 272                         !this.debug|| print( token.toString());
 273
 274                         if (!token) { // can return false at EOF!
 275                             break;
 276                         }
 277                         if (token.name == "VAR" || token.data == ',') { // kludge..
 278                             continue;
 279                         }
 280                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 281                         if (token.type !="NAME") {
 282                             for(var i = Math.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 283                                 print(this.ts.tokens[i].toString());
 284                             }
 285
 286                             print( "var without ident");
 287                             Seed.quit()
 288                         }
 289
 290
 291                         if (this.mode == "BUILDING_SYMBOL_TREE") {
 292                             identifier = scope.getIdentifier(token.data) ;
 293
 294                             if (identifier == false) {
 295                                 scope.declareIdentifier(token.data, token);
 296                             } else {
 297                                 token.identifier = identifier;
 298                                 this.warn("(SCOPE) The variable " + token.data  + ' (line:' + token.line + ")  has already been declared in the same scope...");
 299                             }
 300                         }
 301
 302                         token = this.ts.nextTok();
 303                         !this.debug|| print(token.toString());
 304                         /*
 305                         assert token.getType() == Token.SEMI ||
 306                                 token.getType() == Token.ASSIGN ||
 307                                 token.getType() == Token.COMMA ||
 308                                 token.getType() == Token.IN;
 309                         */
 310                         if (token.name == "IN") {
 311                             break;
 312                         } else {
 313                             //var bn = this.braceNesting;
 314                             var bn = this.braceNesting;
 315                             this.parseExpression();
 316                             this.braceNesting = bn;
 317                             //this.braceNesting = bn;
 318                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 319
 320                             token = this.ts.lookTok(1);
 321                             !this.debug|| print("AFTER EXP: " + token.toString());
 322                             if (token.data == ';') {
 323                                 break;
 324                             }
 325                         }
 326                     }
 327                     break;
 328                 case "KEYW.FUNCTION":
 329                     //println("<i>"+token.data+"</i>");
 330                      var bn = this.braceNesting;
 331                     this.parseFunctionDeclaration();
 332                      this.braceNesting = bn;
 333                     break;
 334
 335                 case "PUNC.LEFT_CURLY": // {
 336                     //println("<i>"+token.data+"</i>");
 337                     isObjectLitAr.push(false);
 338                     this.braceNesting++;
 339
 340                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 341                     break;
 342
 343                 case "PUNC.RIGHT_CURLY": // }
 344                     //println("<i>"+token.data+"</i>");
 345                     this.braceNesting--;
 346                     isObjectLitAr.pop();
 347                     //print(">>>>>> OBJLIT POP"+ this.braceNesting);
 348                         //assert braceNesting >= scope.getBra ceNesting();
 349
 350                     if (this.braceNesting < expressionBraceNesting) {
 351                         var ls = this.scopes.pop();
 352                         ls.getUsedSymbols();
 353                         // eat symbol if we are currently at {
 354                         if (this.ts.look(0).data == '{') {
 355                             this.ts.nextTok();
 356                         }
 357
 358                         print("<<<<<<<EXIT SCOPE" +this.scopes.length);
 359                         return;
 360                     }
 361                     break;
 362
 363                 case "KEYW.WITH":
 364                     //println("<i>"+token.data+"</i>");
 365                     if (this.mode == "BUILDING_SYMBOL_TREE") {
 366                         // Inside a 'with' block, it is impossible to figure out
 367                         // statically whether a symbol is a local variable or an
 368                         // object member. As a consequence, the only thing we can
 369                         // do is turn the obfuscation off for the highest scope
 370                         // containing the 'with' block.
 371                         this.protectScopeFromObfuscation(scope);
 372                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 373                     }
 374                     break;
 375
 376                 case "KEYW.CATCH":
 377                     //println("<i>"+token.data+"</i>");
 378                     this.parseCatch();
 379                     break;
 380                 /*
 381                 case Token.SPECIALCOMMENT:
 382                         if (mode == BUILDING_SYMBOL_TREE) {
 383                             protectScopeFromObfuscation(scope);
 384                             this.warn("Using JScript conditional comments is not recommended." + (munge ? " Moreover, using JScript conditional comments reduces the level of compression." : ""), true);
 385                         }
 386                         break;
 387                 */
 388
 389                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 390                 case "STRN.SINGLE_QUOTE":
 391                     //println("<i>"+token.data+"</i>");
 392                     if (this.ts.lookTok(-1).data == '{' && this.ts.lookTok(1).data == ':') {
 393                         // then we are in an object lit.. -> we need to flag the brace as such...
 394                         isObjectLitAr.pop();
 395                         isObjectLitAr.push(true);
 396                         //print(">>>>>> OBJLIT REPUSH(true)");
 397                     }
 398                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 399
 400                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ':' &&
 401                         ( this.ts.lookTok(-1).data == '{'  ||  this.ts.lookTok(-1).data == ':' )) {
 402                         // see if we can replace..
 403                         // remove the quotes..
 404                         // should do a bit more checking!!!! (what about wierd char's in the string..
 405                         var str = token.data.substring(1,token.data.length-1);
 406                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 407                             token.outData = str;
 408                         }
 409
 410
 411
 412                     }
 413
 414
 415
 416                     break;
 417
 418                 case "NAME.NAME":
 419
 420                     //print("DEAL WITH NAME:");
 421                     // got identifier..
 422
 423                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 424                     if ((this.ts.lookTok(-1).data == "{") && (this.ts.lookTok(1).data == ":")) {
 425                         isObjectLitAr.pop();
 426                         isObjectLitAr.push(true);
 427                         //print(">>>>>> OBJLIT REPUSH(true)");
 428                         //println("<i>"+token.data+"</i>");
 429                         break;
 430                     }
 431                    // print("DEAL WITH obj lit:");
 432                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 433
 434                     if (isInObjectLitAr && (this.ts.lookTok(1).data == ":") && (this.ts.lookTok(-1).data == ",")) {
 435                         // skip, it's an object lit key..
 436                         //println("<i>"+token.data+"</i>");
 437                         break;
 438                     }
 439
 440
 441                     // skip anyting with "." before it..!!
 442
 443                     if (this.ts.lookTok(-1).data == ".") {
 444                         // skip, it's an object prop.
 445                         //println("<i>"+token.data+"</i>");
 446                         break;
 447                     }
 448                     symbol = token.data;
 449                     if (this.mode == 'PASS2_SYMBOL_TREE') {
 450
 451                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 452
 453                         //print ("MUNGE?" + symbol);
 454
 455                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 456
 457                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 458                         identifier = this.getIdentifier(symbol, scope);
 459
 460                         if (identifier == false) {
 461 // BUG!find out where builtin is defined...
 462                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 463                                 // Here, we found an undeclared and un-namespaced symbol that is
 464                                 // 3 characters or less in length. Declare it in the global scope.
 465                                 // We don't need to declare longer symbols since they won't cause
 466                                 // any conflict with other munged symbols.
 467                                 this.globalScope.declareIdentifier(symbol, token);
 468                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 469                             }
 470
 471                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 472                         } else {
 473                             token.identifier = identifier;
 474                             identifier.refcount++;
 475                         }
 476                     }
 477
 478                     break;
 479                     //println("<B>SID</B>");
 480                 default:
 481                     if (token.type != 'KEYW') {
 482                         break;
 483                     }
 484                    // print("Check eval:");
 485
 486                     symbol = token.data;
 487
 488                      if (this.mode == 'BUILDING_SYMBOL_TREE') {
 489
 490                         if (symbol == "eval") {
 491                             // look back one and see if we can find a comment!!!
 492                             if (this.ts.look(-1).type == "COMM") {
 493                                 // look for eval:var:noreplace\n
 494                                 var _t = this;
 495                                 this.ts.look(-1).data.replace(/eval:var:([a-z_]+)/ig, function(m, a) {
 496
 497                                     var hi = _t.getIdentifier(a, scope);
 498                                    // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 499                                     if (hi) {
 500                                      //   println("PROTECT "+a+" from munge");
 501                                         hi.toMunge = false;
 502                                     }
 503
 504                                 });
 505
 506
 507                             } else {
 508
 509
 510                                 this.protectScopeFromObfuscation(scope);
 511                                 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);
 512                             }
 513
 514                         }
 515
 516                     }
 517                     break;
 518
 519
 520             } // end switch
 521
 522
 523             //print("parseScope TOK : " + token.toString());
 524             token = this.ts.nextTok();
 525             //if (this.ts.nextT()) break;
 526
 527         }
 528         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 529     },
 530
 531
 532     parseExpression : function() {
 533
 534         // Parse the expression until we encounter a comma or a semi-colon
 535         // in the same brace nesting, bracket nesting and paren nesting.
 536         // Parse functions if any...
 537         //println("<i>EXP</i><BR/>");
 538         !this.debug || print("PARSE EXPR");
 539
 540
 541         // for printing stuff..
 542
 543
 544
 545         var symbol;
 546         var token;
 547         var currentScope;
 548         var identifier;
 549
 550         var expressionBraceNesting = this.braceNesting + 0;
 551         var bracketNesting = 0;
 552         var parensNesting = 0;
 553         var isInObjectLitAr;
 554         var isObjectLitAr = [ false ];
 555
 556         currentScope = this.scopes[this.scopes.length-1];
 557
 558         var scopeIndent = '';
 559         this.scopes.forEach(function() {
 560             scopeIndent += '   ';
 561         });
 562         print(scopeIndent + ">> ENTER EXPRESSION");
 563         while (token = this.ts.lookTok()) {
 564
 565
 566
 567            /*
 568             // moved out of loop?
 569            currentScope = this.scopes[this.scopes.length-1];
 570
 571             var scopeIndent = '';
 572             this.scopes.forEach(function() {
 573                 scopeIndent += '   ';
 574             });
 575            */
 576
 577            this.dumpToken(token,  this.scopes, this.braceNesting );
 578
 579
 580             //println("<i>"+token.data+"</i>");
 581             //this.log("EXP:" + token.data);
 582             switch (token.type) {
 583                 case 'PUNC':
 584                     switch(token.data) {
 585
 586                         case ';':
 587                         case ',':
 588                             if (this.braceNesting == expressionBraceNesting &&
 589                                     bracketNesting == 0 &&
 590                                     parensNesting == 0) {
 591                                 print(scopeIndent + "<< EXIT EXPRESSION");
 592                                 return;
 593                             }
 594                             break;
 595
 596
 597
 598                         case '{': //Token.LC:
 599                             isObjectLitAr.push(false);
 600
 601                             this.braceNesting++;
 602                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 603                             break;
 604
 605                         case '}': //Token.RC:
 606                             this.braceNesting--;
 607                             isObjectLitAr.pop();
 608                             //print(">>>>> EXP POP" + this.braceNesting);
 609                            // assert braceNesting >= expressionBraceNesting;
 610                             break;
 611
 612                         case '[': //Token.LB:
 613                             bracketNesting++;
 614                             break;
 615
 616                         case ']': //Token.RB:
 617                             bracketNesting--;
 618                             break;
 619
 620                         case '(': //Token.LP:
 621                             parensNesting++;
 622                             break;
 623
 624                         case ')': //Token.RP:
 625                             parensNesting--;
 626                             break;
 627                     }
 628                     break;
 629
 630                 case 'STRN': // used for object lit detection..
 631                     if (this.ts.lookTok(-1).data == "{" && this.ts.lookTok(1).data == ":" ) {
 632                         // then we are in an object lit.. -> we need to flag the brace as such...
 633                         isObjectLitAr.pop();
 634                         isObjectLitAr.push(true);
 635                         //print(">>>>> EXP PUSH(true)");
 636                     }
 637
 638
 639
 640                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 641                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ":"  &&
 642                         ( this.ts.lookTok(-1).data == "{"  ||  this.ts.lookTok(-1).data == "," )) {
 643                         // see if we can replace..
 644                         // remove the quotes..
 645                         var str = token.data.substring(1,token.data.length-1);
 646                         if (/^[a-z_]+$/i.test(str) && ScopeParser.idents.indexOf(str) < 0) {
 647                             token.outData = str;
 648                         }
 649
 650
 651
 652                     }
 653
 654                     break;
 655
 656
 657
 658                 case 'NAME':
 659
 660                     symbol = token.data;
 661                     //print("in NAME = " + token.toString());
 662                     //print("in NAME 0: " + this.ts.look(0).toString());
 663                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 664                     if (this.ts.look(0).data == "{"  && this.ts.lookTok(2).data == ":") {
 665                         // then we are in an object lit.. -> we need to flag the brace as such...
 666                         isObjectLitAr.pop();
 667                         isObjectLitAr.push(true);
 668                          //print(">>>>> EXP  PUSH(true)");
 669                         break;
 670                     }
 671
 672                     isInObjectLitAr = isObjectLitAr[isObjectLitAr.length-1];
 673                     //print ("isInObjectLitAr : " + isInObjectLitAr + ' ' + token.toString());
 674
 675                     if (isInObjectLitAr && this.ts.lookTok(0).data == "," && this.ts.lookTok(2).data == ":") {
 676                         break;
 677                     }
 678                     //print(this.ts.lookTok(0).data);
 679                     if (this.ts.lookTok(0).data == ".") {
 680                         //skip '.'
 681                         break;
 682                     }
 683
 684                      if (this.mode == 'PASS2_SYMBOL_TREE') {
 685
 686                         identifier = this.getIdentifier(symbol, currentScope);
 687                         //println("<B>??</B>");
 688                         if (identifier == false) {
 689
 690                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 691                                 // Here, we found an undeclared and un-namespaced symbol that is
 692                                 // 3 characters or less in length. Declare it in the global scope.
 693                                 // We don't need to declare longer symbols since they won't cause
 694                                 // any conflict with other munged symbols.
 695                                 this.globalScope.declareIdentifier(symbol, token);
 696                                 this.warn("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')', true);
 697                             } else {
 698                                 //println("undeclared")
 699                             }
 700
 701
 702                         } else {
 703                             //println("<B>++</B>");
 704                             token.identifier = identifier;
 705                             identifier.refcount++;
 706                         }
 707
 708                     }
 709                     break;
 710
 711
 712
 713
 714                     //println("<B>EID</B>");
 715                  case 'KEYW':
 716
 717                     if (token.name == "FUNCTION") {
 718
 719                         this.parseFunctionDeclaration();
 720                         break;
 721                     }
 722
 723
 724
 725                     symbol = token.data;
 726                     if (this.mode == 'BUILDING_SYMBOL_TREE') {
 727
 728                         if (symbol == "eval") {
 729                             if (this.ts.look(-1).type == 'COMM') {
 730                                 // look for eval:var:noreplace\n
 731                                 var _t = this;
 732                                 this.ts.look(-1).data.replace(/eval:var:([a-z]+)/ig, function(m, a) {
 733                                     var hi = _t.getIdentifier(a, currentScope);
 734                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 735                                     if (hi) {
 736                                       //  println("PROTECT "+a+" from munge");
 737                                         hi.toMunge = false;
 738                                     }
 739
 740
 741                                 });
 742
 743                             } else {
 744                                 this.protectScopeFromObfuscation(currentScope);
 745                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 746                             }
 747
 748
 749                         }
 750                         break;
 751                     }
 752
 753             }
 754             if (!this.ts.nextTok()) break;
 755         }
 756         print(scopeIndent + "<< EXIT EXPRESSION");
 757     },
 758
 759
 760     parseCatch : function() {
 761
 762         var symbol;
 763         var token;
 764         var currentScope;
 765         var identifier;
 766
 767         //token = getToken(-1);
 768         //assert token.getType() == Token.CATCH;
 769         token = this.ts.nextTok();
 770         //assert token.getType() == Token.LP; (
 771         token = this.ts.nextTok();
 772         //assert token.getType() == Token.NAME;
 773
 774         symbol = token.data;
 775         currentScope = this.scopes[this.scopes.length-1];
 776
 777         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 778             // We must declare the exception identifier in the containing function
 779             // scope to avoid errors related to the obfuscation process. No need to
 780             // display a warning if the symbol was already declared here...
 781             currentScope.declareIdentifier(symbol, token);
 782         } else {
 783             //?? why inc the refcount?? - that should be set when building the tree???
 784             identifier = this.getIdentifier(symbol, currentScope);
 785             identifier.refcount++;
 786         }
 787
 788         token = this.ts.nextTok();
 789         //assert token.getType() == Token.RP; // )
 790     },
 791
 792     parseFunctionDeclaration : function()
 793     {
 794         print("PARSE FUNCTION");
 795         var symbol;
 796         var token;
 797         var currentScope  = false;
 798         var fnScope = false;
 799         var identifier;
 800         var b4braceNesting = this.braceNesting + 0;
 801
 802         //this.logR("<B>PARSING FUNCTION</B>");
 803         currentScope = this.scopes[this.scopes.length-1];
 804
 805         token = this.ts.nextTok();
 806         if (token.type == "NAME") {
 807             if (this.mode == 'BUILDING_SYMBOL_TREE') {
 808                 // Get the name of the function and declare it in the current scope.
 809                 symbol = token.data;
 810                 if (currentScope.getIdentifier(symbol) != false) {
 811                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 812                 }
 813                 currentScope.declareIdentifier(symbol,token);
 814             }
 815             token =  this.ts.nextTok();
 816         }
 817
 818         //assert token.getType() == Token.LP;
 819         if (this.mode == 'BUILDING_SYMBOL_TREE') {
 820             fnScope = new Scope(this.braceNesting, currentScope, token.n, '');
 821
 822             //println("STORING SCOPE" + this.ts.cursor);
 823
 824             this.indexedScopes[this.ts.cursor] = fnScope;
 825
 826         } else {
 827             //qln("FETCHING SCOPE" + this.ts.cursor);
 828             fnScope = this.indexedScopes[this.ts.cursor];
 829
 830         }
 831
 832         // Parse function arguments.
 833         var argpos = 0;
 834         while (this.ts.lookTok().data != ')') { //(token = consumeToken()).getType() != Token.RP) {
 835             token = this.ts.nextTok();
 836            // print ("FUNC ARGS: " + token.toString())
 837             //assert token.getType() == Token.NAME ||
 838             //        token.getType() == Token.COMMA;
 839             if (token.type == 'NAME' && this.mode == 'BUILDING_SYMBOL_TREE') {
 840                 symbol = token.data;
 841                 identifier = fnScope.declareIdentifier(symbol,token);
 842                 if (symbol == "$super" && argpos == 0) {
 843                     // Exception for Prototype 1.6...
 844                     identifier.preventMunging();
 845                 }
 846                 argpos++;
 847             }
 848         }
 849
 850         token = this.ts.nextTok();
 851         print(token.toString());
 852         // assert token.getType() == Token.LC;
 853         this.braceNesting++;
 854
 855         token = this.ts.nextTok();
 856         print(token.toString());
 857         if (token.type == "STRN" && this.ts.lookTok(1).data == ';') {
 858             /*
 859
 860             NOT SUPPORTED YET!?!!?!
 861
 862             // This is a hint. Hints are empty statements that look like
 863             // "localvar1:nomunge, localvar2:nomunge"; They allow developers
 864             // to prevent specific symbols from getting obfuscated (some heretic
 865             // implementations, such as Prototype 1.6, require specific variable
 866             // names, such as $super for example, in order to work appropriately.
 867             // Note: right now, only "nomunge" is supported in the right hand side
 868             // of a hint. However, in the future, the right hand side may contain
 869             // other values.
 870             consumeToken();
 871             String hints = token.getValue();
 872             // Remove the leading and trailing quotes...
 873             hints = hints.substring(1, hints.length() - 1).trim();
 874             StringTokenizer st1 = new StringTokenizer(hints, ",");
 875             while (st1.hasMoreTokens()) {
 876                 String hint = st1.nextToken();
 877                 int idx = hint.indexOf(':');
 878                 if (idx <= 0 || idx >= hint.length() - 1) {
 879                     if (mode == BUILDING_SYMBOL_TREE) {
 880                         // No need to report the error twice, hence the test...
 881                         this.warn("Invalid hint syntax: " + hint, true);
 882                     }
 883                     break;
 884                 }
 885                 String variableName = hint.substring(0, idx).trim();
 886                 String variableType = hint.substring(idx + 1).trim();
 887                 if (mode == BUILDING_SYMBOL_TREE) {
 888                     fnScope.addHint(variableName, variableType);
 889                 } else if (mode == CHECKING_SYMBOL_TREE) {
 890                     identifier = fnScope.getIdentifier(variableName);
 891                     if (identifier != null) {
 892                         if (variableType.equals("nomunge")) {
 893                             identifier.preventMunging();
 894                         } else {
 895                             this.warn("Unsupported hint value: " + hint, true);
 896                         }
 897                     } else {
 898                         this.warn("Hint refers to an unknown identifier: " + hint, true);
 899                     }
 900                 }
 901             }
 902             */
 903         }
 904
 905         this.parseScope(fnScope);
 906         // now pop it off the stack!!!
 907
 908         this.braceNesting = b4braceNesting;
 909         print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 910         print("ENDFN 0: " + this.ts.lookTok(0).toString());
 911         print("ENDFN 1: " + this.ts.lookTok(1).toString());
 912     },
 913
 914     protectScopeFromObfuscation : function(scope) {
 915             //assert scope != null;
 916
 917         if (scope == this.globalScope) {
 918             // The global scope does not get obfuscated,
 919             // so we don't need to worry about it...
 920             return;
 921         }
 922
 923         // Find the highest local scope containing the specified scope.
 924         while (scope && scope.parent != this.globalScope) {
 925             scope = scope.parent;
 926         }
 927
 928         //assert scope.getParentScope() == globalScope;
 929         scope.preventMunging();
 930     },
 931
 932     getIdentifier: function(symbol, scope) {
 933         var identifier;
 934         while (scope != false) {
 935             identifier = scope.getIdentifier(symbol);
 936             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 937             if (identifier) {
 938                 return identifier;
 939             }
 940             scope = scope.parent;
 941         }
 942         return false;
 943     }
 944 };