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