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

   1
   2
   3
   4 namespace JSDOC {
   5
   6         public enum ScopeParserMode {
   7                 BUILDING_SYMBOL_TREE,
   8                 PASS2_SYMBOL_TREE
   9         }
  10
  11
  12         public class ScopeParser : Object {
  13
  14                 TokenStream ts;
  15                 Gee.ArrayList<string> warnings;
  16
  17                 bool debug = false;
  18                 string[] idents;
  19
  20
  21                 Scope global ;
  22                 ScopeParserMode mode;
  23                 //braceNesting : 0,
  24                 Gee.HashMap<int,Scope> indexedScopes;
  25                 bool munge =  true;
  26
  27                 int expN =  0;
  28
  29                 public ScopeParser(TokenStream ts) {
  30                         this.ts = ts; // {TokenStream}
  31                         this.warnings = new Gee.ArrayList<string>();
  32                         this.globalScope = new  Scope(-1, false, -1, '');
  33                         this.indexedScopes = new Gee.HashMap<int,Scope>();
  34
  35                         //this.indexedg = {};
  36                         //this.timer = new Date() * 1;
  37                         this.idents = {
  38
  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
 105
 106
 107                 void warn(string s)
 108                 {
 109                         //print('****************' + s);
 110                         this.warnings.add(s);
 111                         //println("WARNING:" + htmlescape(s) + "<BR>");
 112                 }
 113
 114
 115                 // defaults should not be initialized here =- otherwise they get duped on new, rather than initalized..
 116
 117
 118
 119
 120
 121
 122                 void buildSymbolTree()
 123                 {
 124                         //println("<PRE>");
 125
 126                         this.ts.rewind();
 127                         this.braceNesting = 0;
 128
 129                    // print(JSON.stringify(this.ts.tokens, null,4));
 130
 131
 132                         this.globalScope = new  Scope(-1, false, -1, '');
 133                         this.indexedScopes = new Gee.HashMap<int,Scope>();
 134                         this.indexedScopes.set(0, this.globalScope );
 135
 136                         this.mode = ScopeParserMode.BUILDING_SYMBOL_TREE;
 137
 138                         this.parseScope(this.globalScope);
 139
 140                         //print("---------------END PASS 1 ---------------- ");
 141
 142                 }
 143
 144                 void mungeSymboltree()
 145                 {
 146
 147                         if (!this.munge) {
 148                             return;
 149                         }
 150
 151                         // One problem with obfuscation resides in the use of undeclared
 152                         // and un-namespaced global symbols that are 3 characters or less
 153                         // in length. Here is an example:
 154                         //
 155                         //     var declaredGlobalVar;
 156                         //
 157                         //     function declaredGlobalFn() {
 158                         //         var localvar;
 159                         //         localvar = abc; // abc is an undeclared global symbol
 160                         //     }
 161                         //
 162                         // In the example above, there is a slim chance that localvar may be
 163                         // munged to 'abc', conflicting with the undeclared global symbol
 164                         // abc, creating a potential bug. The following code detects such
 165                         // global symbols. This must be done AFTER the entire file has been
 166                         // parsed, and BEFORE munging the symbol tree. Note that declaring
 167                         // extra symbols in the global scope won't hurt.
 168                         //
 169                         // Note: Since we go through all the tokens to do this, we also use
 170                         // the opportunity to count how many times each identifier is used.
 171
 172                         this.ts.rewind();
 173                         this.braceNesting = 0;
 174                         this.mode = ScopeParserMode.PASS2_SYMBOL_TREE;
 175
 176                         //println("MUNGING?");
 177
 178                         this.parseScope(this.globalScope);
 179
 180                         //this.globalScope.dump();
 181
 182
 183                         this.globalScope.munge();
 184                 }
 185
 186
 187                 void log(string str)
 188                 {
 189                         print(str);
 190                         //print ("                    ".substring(0, this.braceNesting*2) + str);
 191
 192                         //println("<B>LOG:</B>" + htmlescape(str) + "<BR/>\n");
 193                 }
 194                 void logR (string str)
 195                 {
 196                             //println("<B>LOG:</B>" + str + "<BR/>");
 197                 }
 198
 199
 200
 201
 202
 203                 void parseScope(Scope scope) // parse a token stream..
 204                 {
 205                         //this.timerPrint("parseScope EnterScope");
 206                         //this.log(">>> ENTER SCOPE" + this.scopes.length);
 207
 208                         var expressionBraceNesting = this.braceNesting + 0;
 209
 210                         var parensNesting = 0;
 211
 212                         var isObjectLitAr = new Gee.ArrayList<bool>();
 213                         isObjectLitAr.add(false);
 214
 215
 216
 217                         //var scopeIndent = '';
 218                         //this.scopes.forEach(function() {
 219                         //    scopeIndent += '   ';
 220                         //});
 221                         //print(">> ENTER SCOPE");
 222
 223
 224
 225
 226                         var token = this.ts.lookTok(1);
 227                         while (token != null) {
 228                           //  this.timerPrint("parseScope AFTER lookT: " + token.toString());
 229                             //this.dumpToken(token , this.scopes, this.braceNesting);
 230                             //print('SCOPE:' + token.toString());
 231                             //this.log(token.data);
 232                             //if (token.type == 'NAME') {
 233                             //    print('*' + token.data);
 234                             //}
 235                             switch(token.type + '.' + token.name) {
 236                                 case "KEYW.VAR":
 237                                 case "KEYW.CONST": // not really relivant as it's only mozzy that does this.
 238                                     //print('SCOPE-VAR:' + token.toString());
 239                                     var vstart = this.ts.cursor +1;
 240
 241                                     //this.log("parseScope GOT VAR/CONST : " + token.toString());
 242                                     while (true) {
 243                                         token = this.ts.nextTok();
 244                                         //!this.debug|| print( token.toString());
 245                                        // print('SCOPE-VAR-VAL:' + JSON.stringify(token, null, 4));
 246                                         if (token == null) { // can return false at EOF!
 247                                             break;
 248                                         }
 249                                         if (token.name == "VAR" || token.data == ",") { // kludge..
 250                                             continue;
 251                                         }
 252                                         //this.logR("parseScope GOT VAR  : <B>" + token.toString() + "</B>");
 253                                         if (token.type != "NAME") {
 254
 255                                             for(var i = int.max(this.ts.cursor-10,0); i < this.ts.cursor+1; i++) {
 256                                                 print(this.ts.tokens[i].toString());
 257                                             }
 258
 259                                             print( "var without ident");
 260                                             GLib.Process.exit (0);
 261                                         }
 262
 263
 264                                         if (this.mode == ScopeParserMode.BUILDING_SYMBOL_TREE) {
 265                                             var identifier = scope.getIdentifier(token.data,token) ;
 266
 267                                             if (identifier == null) {
 268                                                 scope.declareIdentifier(token.data, token);
 269                                             } else {
 270                                                 token.identifier = identifier;
 271                                                 this.warn("(SCOPE) The variable " + token.data  + " (line:" + token.line + ")  has already been declared in the same scope...");
 272                                             }
 273                                         }
 274
 275                                         token = this.ts.nextTok();
 276                                         //!this.debug|| print(token.toString());
 277                                         /*
 278                                         assert token.getType() == Token.SEMI ||
 279                                                 token.getType() == Token.ASSIGN ||
 280                                                 token.getType() == Token.COMMA ||
 281                                                 token.getType() == Token.IN;
 282                                         */
 283                                         if (token.name == "IN") {
 284                                             break;
 285                                         } else {
 286                                             //var bn = this.braceNesting;
 287                                             var bn = this.braceNesting;
 288                                             var nts = new Gee.ArrayList<Token>();
 289                                             while (true) {
 290                                                 if (!token || token.type == "VOID" || token.data == ",") {
 291                                                     break;
 292                                                 }
 293                                                 nts.add(token);
 294                                                 token = this.ts.nextTok();
 295                                             }
 296                                             if (nts.size > 0) {
 297                                                 var TS = this.ts;
 298                                                 this.ts = new TokenStream(nts);
 299                                                 this.parseExpression(scope);
 300                                                 this.ts = TS;
 301                                             }
 302
 303                                             this.braceNesting = bn;
 304                                             //this.braceNesting = bn;
 305                                             //this.logR("parseScope DONE  : <B>ParseExpression</B> - tok is:" + this.ts.lookT(0).toString());
 306
 307                                             token = this.ts.lookTok(1);
 308                                             //!this.debug||
 309                                            // print("AFTER EXP: " + token.toString());
 310                                             if (token.data == ";") {
 311                                                 break;
 312                                             }
 313                                         }
 314                                     }
 315
 316                                     //print("VAR:")
 317                                     //this.ts.dump(vstart , this.ts.cursor);
 318
 319                                     break;
 320
 321
 322                                 case "KEYW.FUNCTION":
 323                                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 324                                     //    print('SCOPE-FUNC:' + JSON.stringify(token,null,4));
 325                                     //println("<i>"+token.data+"</i>");
 326                                      var bn = this.braceNesting;
 327                                     this.parseFunctionDeclaration(scope);
 328                                      this.braceNesting = bn;
 329                                     break;
 330
 331                                 case "PUNC.LEFT_CURLY": // {
 332                                 case "PUNC.LEFT_PAREN": // (
 333                                 case "PUNC.LEFT_BRACE": // [
 334                                     //print('SCOPE-CURLY/PAREN:' + token.toString());
 335                                     //println("<i>"+token.data+"</i>");
 336                                     var curTS = this.ts;
 337                                     if (token.props.size() > 0) {
 338
 339                                         // { a : ... , c : .... }
 340                                         var iter = token.props.map_iterator();
 341
 342                                         while(iter.next()) {
 343
 344                                             TokenKeyMap val = iter.get_value(); // TokenKeyMap
 345
 346
 347                                           //  print('SCOPE-PROPS:' + JSON.stringify(token.props[prop],null,4));
 348                                             if (val.vals.get(0).data == "function") {
 349                                                 // parse a function..
 350                                                 this.ts = new TokenStream(val.vals);
 351                                                 this.ts.nextTok();
 352                                                 this.parseFunctionDeclaration(scope);
 353
 354                                                 continue;
 355                                             }
 356                                             // key value..
 357
 358                                             this.ts = new TokenStream(val.vals);
 359                                             this.parseExpression(scope);
 360
 361                                         }
 362                                         this.ts = curTS;
 363
 364                                         // it's an object literal..
 365                                         // the values could be replaced..
 366                                         break;
 367                                     }
 368
 369                                     // ( ... ) or { .... } not object literals..
 370
 371
 372                             for (var xx =0; xx < token.items.size; xx++) {
 373                                                 expr = token.items.get(xx);
 374                                     //token.items.forEach(function(expr) {
 375                                             //print(expr.toString());
 376                                            this.ts = new TokenStream(expr);
 377                                             //if (curTS.data == '(') {
 378                                                 this.parseScope(scope);
 379                                             //} else {
 380                                               //  _this.parseExpression(scope)
 381                                             //}
 382
 383                                     }
 384                                     this.ts = curTS;
 385                                     //print("NOT PROPS"); Seed.quit();
 386
 387                                     //isObjectLitAr.push(false);
 388                                     //this.braceNesting++;
 389
 390                                     //print(">>>>>> OBJLIT PUSH(false)" + this.braceNesting);
 391                                     break;
 392
 393                                 case "PUNC.RIGHT_CURLY": // }
 394                                     //print("<< EXIT SCOPE");
 395                                     return;
 396
 397                                 case "KEYW.WITH":
 398                                     //print('SCOPE-WITH:' + token.toString());
 399                                     //println("<i>"+token.data+"</i>");
 400                                     if (this.mode == ScopeParserMode.BUILDING_SYMBOL_TREE) {
 401                                         // Inside a 'with' block, it is impossible to figure out
 402                                         // statically whether a symbol is a local variable or an
 403                                         // object member. As a consequence, the only thing we can
 404                                         // do is turn the obfuscation off for the highest scope
 405                                         // containing the 'with' block.
 406                                         this.protectScopeFromObfuscation(scope);
 407                                         this.warn("Using 'with' is not recommended." + (this.munge ? " Moreover, using 'with' reduces the level of compression!" : ""), true);
 408                                     }
 409                                     break;
 410
 411                                 case "KEYW.CATCH":
 412                                     //print('SCOPE-CATCH:' + token.toString());
 413                                     //println("<i>"+token.data+"</i>");
 414                                     this.parseCatch(scope);
 415                                     break;
 416
 417                                 case "STRN.DOUBLE_QUOTE": // used for object lit detection..
 418                                 case "STRN.SINGLE_QUOTE":
 419                                   //  print('SCOPE-STRING:' + token.toString());
 420                                     //println("<i>"+token.data+"</i>");
 421
 422                                     if (this.ts.lookTok(-1).data == "{" && this.ts.lookTok(1).data == ":") {
 423                                         // then we are in an object lit.. -> we need to flag the brace as such...
 424                                         isObjectLitAr.remove_at(isObjectLitAr.size-1);
 425                                         isObjectLitAr.add(true);
 426                                         //print(">>>>>> OBJLIT REPUSH(true)");
 427                                     }
 428                                     isInObjectLitAr = isObjectLitAr.get(isObjectLitAr.size-1);
 429
 430                                     if (isInObjectLitAr &&  this.ts.lookTok(1).data == ":" &&
 431                                         ( this.ts.lookTok(-1).data == "{"  ||  this.ts.lookTok(-1).data == ":" )) {
 432                                         // see if we can replace..
 433                                         // remove the quotes..
 434                                         // should do a bit more checking!!!! (what about wierd char's in the string..
 435                                         var str = token.data.substring(1,token.data.length-1);
 436
 437                                         if (Regex.match_simple ("^[a-z_]+$", str,GLib.RegexCompileFlags.CASELESS) && this.idents.index_of(str) < 0) {
 438                                             token.outData = str;
 439                                         }
 440
 441
 442
 443                                     }
 444
 445                                     break;
 446
 447                                 case "NAME.NAME":
 448                                     //print('SCOPE-NAME:' + token.toString());
 449                                     //print("DEAL WITH NAME:");
 450                                     // got identifier..
 451                                     // look for  { ** : <- indicates obj literal.. ** this could occur with numbers ..
 452                                     // skip anyting with "." before it..!!
 453
 454                                     if (this.ts.lookTok(-1).data == ".") {
 455                                         // skip, it's an object prop.
 456                                         //println("<i>"+token.data+"</i>");
 457                                         break;
 458                                     }
 459                                     //print("SYMBOL: " + token.toString());
 460
 461                                     symbol = token.data;
 462                                     if (symbol == "this") {
 463                                         break;
 464                                     }
 465
 466                                     if (this.mode == ScopeParserMode.PASS2_SYMBOL_TREE) {
 467
 468                                         //println("GOT IDENT: -2 : " + this.ts.lookT(-2).toString() + " <BR> ..... -1 :  " +  this.ts.lookT(-1).toString() + " <BR> ");
 469
 470                                         //print ("MUNGE?" + symbol);
 471
 472                                         //println("GOT IDENT: <B>" + symbol + "</B><BR/>");
 473
 474                                             //println("GOT IDENT (2): <B>" + symbol + "</B><BR/>");
 475                                         var identifier = this.getIdentifier(symbol, scope, token);
 476
 477                                         if (identifier == null) {
 478         // BUG!find out where builtin is defined...
 479                                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 480                                                 // Here, we found an undeclared and un-namespaced symbol that is
 481                                                 // 3 characters or less in length. Declare it in the global scope.
 482                                                 // We don't need to declare longer symbols since they won't cause
 483                                                 // any conflict with other munged symbols.
 484                                                 this.globalScope.declareIdentifier(symbol, token);
 485                                                 this.warn("Found an undeclared symbol: " + symbol + " (line:" + token.line + ")", true);
 486                                             }
 487
 488                                             //println("GOT IDENT IGNORE(3): <B>" + symbol + "</B><BR/>");
 489                                         } else {
 490                                             token.identifier = identifier;
 491                                             identifier.refcount++;
 492                                         }
 493                                     }
 494
 495                                     break;
 496                                     //println("<B>SID</B>");
 497                                 default:
 498                                     if (token.type != "KEYW") {
 499                                         break;
 500                                     }
 501                                     //print('SCOPE-KEYW:' + token.toString());
 502                                    // print("Check eval:");
 503
 504                                     symbol = token.data;
 505
 506                                      if (this.mode == ScopeParserMode.BUILDING_SYMBOL_TREE) {
 507
 508                                         if (token.name == "EVAL") {
 509
 510                                             //print(JSON.stringify(token, null,4));
 511                                             // look back one and see if we can find a comment!!!
 512                                             //if (this.ts.look(-1).type == "COMM") {
 513                                             if (token.prefix && token.prefix.match(/eval/)) {
 514                                                 // look for eval:var:noreplace\n
 515                                                 //print("MATCH!?");
 516                                                 var _t = this;
 517
 518                                                 var regex = new GLib.Regex ("eval:var:([a-z_]+)",GLib.RegexCompileFlags.CASELESS );
 519
 520                                                 regex.replace_eval (token.prefix, token.prefix.length, 0, 0, (match_info, result) => {
 521                                                                 var a =  match_info.fetch(0);
 522                                                     var hi = this.getIdentifier(a, scope, token);
 523                                                            // println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 524                                                     if (hi.length > 0) {
 525                                                       //  print("PROTECT "+a+" from munge");
 526                                                         //print(JSON.stringify(hi,null,4));
 527                                                         hi.toMunge = false;
 528                                                     }
 529
 530                                                 });
 531
 532
 533                                             } else {
 534
 535
 536                                                 this.protectScopeFromObfuscation(scope);
 537                                                 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);
 538                                             }
 539
 540                                         }
 541
 542                                     }
 543                                     break;
 544
 545
 546                             } // end switch
 547
 548
 549                             //print("parseScope TOK : " + token.toString());
 550                             token = this.ts.nextTok();
 551                             //if (this.ts.nextT()) break;
 552
 553                         }
 554                         //print("<<< EXIT SCOPE");
 555                         //print("<<<<<<<EXIT SCOPE ERR?" +this.scopes.length);
 556                 }
 557
 558
 559
 560                 void parseExpression(Scope scope)
 561                 {
 562
 563                         // Parse the expression until we encounter a comma or a semi-colon
 564                         // in the same brace nesting, bracket nesting and paren nesting.
 565                         // Parse functions if any...
 566                         //println("<i>EXP</i><BR/>");
 567                         //!this.debug || print("PARSE EXPR");
 568                         this.expN++;
 569
 570                         // for printing stuff..
 571
 572
 573
 574
 575                         var expressionBraceNesting = this.braceNesting + 0;
 576                         var bracketNesting = 0;
 577                         var parensNesting = 0;
 578                         var isInObjectLitAr;
 579                         var isObjectLitAr = new Gee.ArrayList<boolean>();
 580                         isObjectLitAr.add( false);
 581
 582
 583
 584
 585                         //print(scopeIndent + ">> ENTER EXPRESSION" + this.expN);
 586                         while (null != (token = this.ts.nextTok())) {
 587
 588
 589
 590                            /*
 591                             // moved out of loop?
 592                            currentScope = this.scopes[this.scopes.length-1];
 593
 594                             var scopeIndent = '';
 595                             this.scopes.forEach(function() {
 596                                 scopeIndent += '   ';
 597                             });
 598                            */
 599
 600                            //this.dumpToken(token,  this.scopes, this.braceNesting );
 601                             //print('EXPR' +  token.toString());
 602
 603
 604                             //println("<i>"+token.data+"</i>");
 605                             //this.log("EXP:" + token.data);
 606                             switch (token.type) {
 607                                 case "PUNC":
 608                                     //print("EXPR-PUNC:" + token.toString());
 609
 610                                     switch(token.data) {
 611
 612                                         case ";":
 613                                             //print("<< EXIT EXPRESSION");
 614                                             break;
 615
 616                                         case ",":
 617
 618                                             break;
 619
 620
 621                                         case "(": //Token.LP:
 622                                         case "{": //Token.LC:
 623                                         case "[": //Token.LB:
 624                                             //print('SCOPE-CURLY/PAREN/BRACE:' + token.toString());
 625                                            // print('SCOPE-CURLY/PAREN/BRACE:' + JSON.stringify(token, null,4));
 626                                             //println("<i>"+token.data+"</i>");
 627                                             var curTS = this.ts;
 628                                             if (token.props.size > 0) {
 629
 630                                                  var iter = token.props.map_iterator();
 631
 632                                                                         while(iter.next()) {
 633
 634                                                                     TokenKeyMap val = iter.get_value(); // TokenKeyMap
 635
 636
 637
 638                                                     //if (val.vals.size < 1) {
 639                                                         //print(JSON.stringify(token.props, null,4));
 640                                                     //}
 641
 642                                                     if (val.vals.get(0).data == "function") {
 643                                                         // parse a function..
 644                                                         this.ts = new TokenStream(val.vals);
 645                                                         this.ts.nextTok();
 646                                                         this.parseFunctionDeclaration(scope);
 647                                                         continue;
 648                                                     }
 649                                                     // key value..
 650
 651                                                     this.ts = new TokenStream(val.vals);
 652                                                     this.parseExpression(scope);
 653
 654                                                 }
 655                                                 this.ts = curTS;
 656
 657                                                 // it's an object literal..
 658                                                 // the values could be replaced..
 659                                                 break;
 660                                             }
 661
 662
 663
 664                                             foreach(var expr in token.items) {
 665
 666                                                   this.ts = new TokenStream(expr);
 667                                                   this.parseExpression(scope);
 668                                             }
 669                                             this.ts = curTS;
 670
 671
 672
 673                                             ///print(">>>>> EXP PUSH(false)"+this.braceNesting);
 674                                             break;
 675
 676
 677
 678
 679
 680                                         case ")": //Token.RP:
 681                                         case "]": //Token.RB:
 682                                         case "}": //Token.RB:
 683                                             //print("<< EXIT EXPRESSION");
 684                                             return;
 685
 686
 687
 688                                             parensNesting++;
 689                                             break;
 690
 691
 692
 693                                     }
 694                                     break;
 695
 696                                 case "STRN": // used for object lit detection..
 697                                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 698                                         //print("EXPR-STR:" + JSON.stringify(token, null, 4));
 699
 700
 701                                     break;
 702
 703
 704
 705                                 case "NAME":
 706                                     if (this.mode == ScopeParserMode.BUILDING_SYMBOL_TREE) {
 707
 708                                         //print("EXPR-NAME:" + JSON.stringify(token, null, 4));
 709                                     } else {
 710                                         //print("EXPR-NAME:" + token.toString());
 711                                     }
 712                                     var symbol = token.data;
 713                                     //print("in NAME = " + token.toString());
 714                                     //print("in NAME 0: " + this.ts.look(0).toString());
 715                                     //print("in NAME 2: " + this.ts.lookTok(2).toString());
 716
 717                                     //print(this.ts.lookTok(-1).data);
 718                                     // prefixed with '.'
 719                                     if (this.ts.lookTok(-1).data == ".") {
 720                                         //skip '.'
 721                                         break;
 722                                     }
 723                                     if (symbol == "this") {
 724                                         break;
 725                                }
 726
 727                                     if (this.mode == ScopeParserMode.PASS2_SYMBOL_TREE) {
 728
 729                                         var identifier = this.getIdentifier(symbol, scope, token);
 730                                         //println("<B>??</B>");
 731                                         if (identifier == null) {
 732
 733                                             if (symbol.length <= 3 &&  Scope.builtin.indexOf(symbol) < 0) {
 734                                                 // Here, we found an undeclared and un-namespaced symbol that is
 735                                                 // 3 characters or less in length. Declare it in the global scope.
 736                                                 // We don't need to declare longer symbols since they won't cause
 737                                                 // any conflict with other munged symbols.
 738                                                 this.globalScope.declareIdentifier(symbol, token);
 739                                                 this.warn("Found an undeclared symbol: " + symbol + " (line:" + token.line + ")", true);
 740                                                 //print("Found an undeclared symbol: " + symbol + ' (line:' + token.line + ')');
 741                                                 //throw "OOPS";
 742                                             } else {
 743                                                 //print("undeclared:" + token.toString())
 744                                             }
 745
 746
 747                                         } else {
 748                                             //println("<B>++</B>");
 749                                             token.identifier = identifier;
 750                                             identifier.refcount++;
 751                                         }
 752
 753                                     }
 754                                     break;
 755
 756
 757
 758
 759                                     //println("<B>EID</B>");
 760                                 case "KEYW":
 761                                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 762                                     //    print("EXPR-KEYW:" + JSON.stringify(token, null, 4));
 763
 764                                     //print('EXPR-KEYW:' + token.toString());
 765                                     if (token.name == "FUNCTION") {
 766
 767                                         this.parseFunctionDeclaration(scope);
 768                                         break;
 769                                     }
 770
 771
 772                                     var symbol = token.data;
 773                                     if (this.mode == ScopeParserMode.BUILDING_SYMBOL_TREE) {
 774
 775                                         if (token.name == "EVAL") {
 776
 777
 778                                             //print(JSON.stringify(token,null,4));
 779
 780                                             if (token.prefix.length > 0 && Regex.match_simple ("eval:var:", token.prefix,GLib.RegexCompileFlags.CASELESS)) {
 781                                                 // look for eval:var:noreplace\n
 782                                                // print("GOT MATCH?");
 783
 784
 785                                            var regex = new GLib.Regex ("eval:var:([a-z_]+)",GLib.RegexCompileFlags.CASELESS );
 786
 787                                                 regex.replace_eval (token.prefix, token.prefix.length, 0, 0, (match_info, result) => {
 788                                                         var a = match_info.fetch(0);
 789                                                     //print("PROTECT: " + a);
 790
 791
 792                                                     var hi = this.getIdentifier(a, scope, token);
 793                                                    //println("PROTECT "+a+" from munge" + (hi ? "FOUND" : "MISSING"));
 794                                                     if (hi != null) {
 795                                                       //  println("PROTECT "+a+" from munge");
 796                                                         hi.toMunge = false;
 797                                                     }
 798
 799
 800                                                 });
 801
 802                                             } else {
 803                                                 this.protectScopeFromObfuscation(scope);
 804                                                 this.warn("Using 'eval' is not recommended." + (this.munge ? " Moreover, using 'eval' reduces the level of compression!" : ""), true);
 805                                             }
 806
 807
 808                                         }
 809                                         break;
 810                                     }
 811                                 default:
 812                                     //if (this.mode == 'BUILDING_SYMBOL_TREE')
 813                                     //    print("EXPR-SKIP:" + JSON.stringify(token, null, 4));
 814                                     break;
 815                             }
 816
 817                         }
 818                         //print("<< EXIT EXPRESSION");
 819                         this.expN--;
 820                 }
 821
 822
 823                 void parseCatch(Scoope scope) {
 824
 825
 826                         //token = getToken(-1);
 827                         //assert token.getType() == Token.CATCH;
 828                         var token = this.ts.nextTok(1);
 829                         token = this.ts.nextTok(1);
 830
 831
 832                         //print(JSON.stringify(this.ts,null,4));
 833                         //assert token.getType() == Token.LP; (
 834                         //token = this.ts.nextTok();
 835                         //assert token.getType() == Token.NAME;
 836
 837                         var symbol = token.items[0][0].data;
 838
 839
 840                         if (this.mode == ScopeParserMode.BUILDING_SYMBOL_TREE) {
 841                             // We must declare the exception identifier in the containing function
 842                             // scope to avoid errors related to the obfuscation process. No need to
 843                             // display a warning if the symbol was already declared here...
 844                             scope.declareIdentifier(symbol, token.items[0][0]);
 845                         } else {
 846                             //?? why inc the refcount?? - that should be set when building the tree???
 847                             var identifier = this.getIdentifier(symbol, scope, token.items[0][0]);
 848                             identifier.refcount++;
 849                         }
 850
 851                         //token = this.ts.nextTok();
 852                         //assert token.getType() == Token.RP; // )
 853                 }
 854
 855                 void parseFunctionDeclaration (Scope scope)
 856                 {
 857                         //print("PARSE FUNCTION");
 858
 859                         var fnScope = false;
 860
 861                         var b4braceNesting = this.braceNesting + 0;
 862
 863                         //this.logR("<B>PARSING FUNCTION</B>");
 864
 865
 866                         var token = this.ts.nextTok();
 867                         if (token.type == "NAME") {
 868                             if (this.mode == ScopeParserMode.BUILDING_SYMBOL_TREE) {
 869                                 // Get the name of the function and declare it in the current scope.
 870                                 symbol = token.data;
 871                                 if (scope.getIdentifier(symbol,token) != false) {
 872                                     this.warn("The function " + symbol + " has already been declared in the same scope...", true);
 873                                 }
 874                                 scope.declareIdentifier(symbol,token);
 875                             }
 876                             token =  this.ts.nextTok();
 877                         }
 878
 879
 880                         // return function() {....
 881                         while (token.data != "(") {
 882                             //print(token.toString());
 883                             token =  this.ts.nextTok();
 884
 885                         }
 886
 887                         Scope fnScope;
 888                         //assert token.getType() == Token.LP;
 889                         if (this.mode == ScopeParserMode.BUILDING_SYMBOL_TREE) {
 890                             fnScope = new Scope(1, scope, token.n, '', token);
 891
 892                             //println("STORING SCOPE" + this.ts.cursor);
 893
 894                             this.indexedScopes[token.id] = fnScope;
 895
 896                         } else {
 897                             //qln("FETCHING SCOPE" + this.ts.cursor);
 898                             fnScope = this.indexedScopes[token.id];
 899                         }
 900                         //if (this.mode == 'BUILDING_SYMBOL_TREE')
 901                         //  print('FUNC-PARSE:' + JSON.stringify(token,null,4));
 902                         // Parse function arguments.
 903                         var args = token.items;
 904                         for (var argpos =0; argpos < args.size; argpos++) {
 905
 906                             token = args.get(argpos).get(0);
 907                             //print ("FUNC ARGS: " + token.toString())
 908                             //assert token.getType() == Token.NAME ||
 909                             //        token.getType() == Token.COMMA;
 910                             if (token.type == "NAME" && this.mode == ScopeParserMode.BUILDING_SYMBOL_TREE) {
 911                                 var symbol = token.data;
 912                                 var identifier = fnScope.declareIdentifier(symbol,token);
 913                                 if (symbol == "$super" && argpos == 0) {
 914                                     // Exception for Prototype 1.6...
 915                                     identifier.preventMunging();
 916                                 }
 917                                 //argpos++;
 918                             }
 919                         }
 920
 921                         token = this.ts.nextTok();
 922                         //print('FUNC-BODY:' + JSON.stringify(token.items,null,4));
 923                         //Seed.quit();
 924                         //print(token.toString());
 925                         // assert token.getType() == Token.LC;
 926                         //this.braceNesting++;
 927
 928                         //token = this.ts.nextTok();
 929                         //print(token.toString());
 930                         var outTS = this.ts;
 931                         foreach(var tar in token.items) {
 932                                 this.ts = new TokenStream(tar);
 933                                 this.parseScope(fnScope);
 934
 935                         }
 936
 937                         //print(JSON.stringify(this.ts,null,4));
 938                         //this.parseScope(fnScope);
 939                         this.ts = outTS;
 940                         // now pop it off the stack!!!
 941
 942                         //this.braceNesting = b4braceNesting;
 943                         //print("ENDFN -1: " + this.ts.lookTok(-1).toString());
 944                         //print("ENDFN 0: " + this.ts.lookTok(0).toString());
 945                         //print("ENDFN 1: " + this.ts.lookTok(1).toString());
 946                 }
 947
 948                 void protectScopeFromObfuscation (Scope scope) {
 949                             //assert scope != null;
 950
 951                         if (scope == this.globalScope) {
 952                             // The global scope does not get obfuscated,
 953                             // so we don't need to worry about it...
 954                             return;
 955                         }
 956
 957                         // Find the highest local scope containing the specified scope.
 958                         while (scope && scope.parent != this.globalScope) {
 959                             scope = scope.parent;
 960                         }
 961
 962                         //assert scope.getParentScope() == globalScope;
 963                         scope.preventMunging();
 964                 }
 965
 966                 Token? getIdentifier(string symbol, Scope in_scope, Token token)
 967                 {
 968                         Token identifier;
 969                         var scope = in_scope;
 970                         while (scope != null) {
 971                             identifier = scope.getIdentifier(symbol, token);
 972                             //println("ScopeParser.getIdentgetUsedSymbols("+symbol+")=" + scope.getUsedSymbols().join(','));
 973                             if (identifier != null) {
 974                                 return identifier;
 975                             }
 976                             scope = scope.parent;
 977                         }
 978                         return null;
 979                 }
 980         }
 981 }