src/declarative/qml/qdeclarativescript.cpp

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  41
  42 #include "qdeclarativescript_p.h"
  43
  44 #include "parser/qdeclarativejsengine_p.h"
  45 #include "parser/qdeclarativejsparser_p.h"
  46 #include "parser/qdeclarativejslexer_p.h"
  47 #include "parser/qdeclarativejsmemorypool_p.h"
  48 #include "parser/qdeclarativejsastvisitor_p.h"
  49 #include "parser/qdeclarativejsast_p.h"
  50 #include <private/qdeclarativerewrite_p.h>
  51
  52 #include <QStack>
  53 #include <QCoreApplication>
  54 #include <QtDebug>
  55
  56 QT_BEGIN_NAMESPACE
  57
  58 using namespace QDeclarativeJS;
  59 using namespace QDeclarativeScript;
  60
  61 //
  62 // Parser IR classes
  63 //
  64 QDeclarativeScript::Object::Object()
  65 : type(-1), idIndex(-1), metatype(0), synthCache(0), defaultProperty(0), parserStatusCast(-1),
  66   componentCompileState(0), nextAliasingObject(0), nextIdObject(0)
  67 {
  68 }
  69
  70 QDeclarativeScript::Object::~Object()
  71 {
  72     if (synthCache) synthCache->release();
  73 }
  74
  75 void Object::setBindingBit(int b)
  76 {
  77     while (bindingBitmask.size() < 4 * (1 + b / 32))
  78         bindingBitmask.append(char(0));
  79
  80     quint32 *bits = (quint32 *)bindingBitmask.data();
  81     bits[b / 32] |= (1 << (b % 32));
  82 }
  83
  84 const QMetaObject *Object::metaObject() const
  85 {
  86     if (!metadata.isEmpty() && metatype)
  87         return &extObject;
  88     else
  89         return metatype;
  90 }
  91
  92 QDeclarativeScript::Property *Object::getDefaultProperty()
  93 {
  94     if (!defaultProperty) {
  95         defaultProperty = pool()->New<Property>();
  96         defaultProperty->parent = this;
  97     }
  98     return defaultProperty;
  99 }
 100
 101 void QDeclarativeScript::Object::addValueProperty(Property *p)
 102 {
 103     valueProperties.append(p);
 104 }
 105
 106 void QDeclarativeScript::Object::addSignalProperty(Property *p)
 107 {
 108     signalProperties.append(p);
 109 }
 110
 111 void QDeclarativeScript::Object::addAttachedProperty(Property *p)
 112 {
 113     attachedProperties.append(p);
 114 }
 115
 116 void QDeclarativeScript::Object::addGroupedProperty(Property *p)
 117 {
 118     groupedProperties.append(p);
 119 }
 120
 121 void QDeclarativeScript::Object::addValueTypeProperty(Property *p)
 122 {
 123     valueTypeProperties.append(p);
 124 }
 125
 126 void QDeclarativeScript::Object::addScriptStringProperty(Property *p)
 127 {
 128     scriptStringProperties.append(p);
 129 }
 130
 131 // This lookup is optimized for missing, and having to create a new property.
 132 Property *QDeclarativeScript::Object::getProperty(const QHashedStringRef &name, bool create)
 133 {
 134     if (create) {
 135         quint32 h = name.hash();
 136         if (propertiesHashField.testAndSet(h)) {
 137             for (Property *p = properties.first(); p; p = properties.next(p)) {
 138                 if (p->name() == name)
 139                     return p;
 140             }
 141         }
 142
 143         Property *property = pool()->New<Property>();
 144         property->parent = this;
 145         property->_name = name;
 146         property->isDefault = false;
 147         properties.prepend(property);
 148         return property;
 149     } else {
 150         for (Property *p = properties.first(); p; p = properties.next(p)) {
 151             if (p->name() == name)
 152                 return p;
 153         }
 154     }
 155
 156     return 0;
 157 }
 158
 159 Property *QDeclarativeScript::Object::getProperty(const QStringRef &name, bool create)
 160 {
 161     return getProperty(QHashedStringRef(name), create);
 162 }
 163
 164 Property *QDeclarativeScript::Object::getProperty(const QString &name, bool create)
 165 {
 166     for (Property *p = properties.first(); p; p = properties.next(p)) {
 167         if (p->name() == name)
 168             return p;
 169     }
 170
 171     if (create) {
 172         Property *property = pool()->New<Property>();
 173         property->parent = this;
 174         property->_name = QStringRef(pool()->NewString(name));
 175         propertiesHashField.testAndSet(property->_name.hash());
 176         property->isDefault = false;
 177         properties.prepend(property);
 178         return property;
 179     } else {
 180         return 0;
 181     }
 182 }
 183
 184 QDeclarativeScript::Object::DynamicProperty::DynamicProperty()
 185 : isDefaultProperty(false), isReadOnly(false), type(Variant), defaultValue(0), nextProperty(0),
 186   resolvedCustomTypeName(0)
 187 {
 188 }
 189
 190 QDeclarativeScript::Object::DynamicSignal::DynamicSignal()
 191 : nextSignal(0)
 192 {
 193 }
 194
 195 // Returns length in utf8 bytes
 196 int QDeclarativeScript::Object::DynamicSignal::parameterTypesLength() const
 197 {
 198     int rv = 0;
 199     for (int ii = 0; ii < parameterTypes.count(); ++ii)
 200         rv += parameterTypes.at(ii).length();
 201     return rv;
 202 }
 203
 204 // Returns length in utf8 bytes
 205 int QDeclarativeScript::Object::DynamicSignal::parameterNamesLength() const
 206 {
 207     int rv = 0;
 208     for (int ii = 0; ii < parameterNames.count(); ++ii)
 209         rv += parameterNames.at(ii).utf8length();
 210     return rv;
 211 }
 212
 213 QDeclarativeScript::Object::DynamicSlot::DynamicSlot()
 214 : nextSlot(0)
 215 {
 216 }
 217
 218 int QDeclarativeScript::Object::DynamicSlot::parameterNamesLength() const
 219 {
 220     int rv = 0;
 221     for (int ii = 0; ii < parameterNames.count(); ++ii)
 222         rv += parameterNames.at(ii).length();
 223     return rv;
 224 }
 225
 226 QDeclarativeScript::Property::Property()
 227 : parent(0), type(0), index(-1), value(0), isDefault(true), isDeferred(false),
 228   isValueTypeSubProperty(false), isAlias(false), isReadOnlyDeclaration(false),
 229   scriptStringScope(-1), nextMainProperty(0), nextProperty(0)
 230 {
 231 }
 232
 233 QDeclarativeScript::Object *QDeclarativeScript::Property::getValue(const LocationSpan &l)
 234 {
 235     if (!value) { value = pool()->New<Object>(); value->location = l; }
 236     return value;
 237 }
 238
 239 void QDeclarativeScript::Property::addValue(Value *v)
 240 {
 241     values.append(v);
 242 }
 243
 244 void QDeclarativeScript::Property::addOnValue(Value *v)
 245 {
 246     onValues.append(v);
 247 }
 248
 249 bool QDeclarativeScript::Property::isEmpty() const
 250 {
 251     return !value && values.isEmpty() && onValues.isEmpty();
 252 }
 253
 254 QDeclarativeScript::Value::Value()
 255 : type(Unknown), object(0), bindingReference(0), nextValue(0)
 256 {
 257 }
 258
 259 QDeclarativeScript::Variant::Variant()
 260 : t(Invalid)
 261 {
 262 }
 263
 264 QDeclarativeScript::Variant::Variant(const Variant &o)
 265 : t(o.t), d(o.d), asWritten(o.asWritten)
 266 {
 267 }
 268
 269 QDeclarativeScript::Variant::Variant(bool v)
 270 : t(Boolean), b(v)
 271 {
 272 }
 273
 274 QDeclarativeScript::Variant::Variant(double v, const QStringRef &asWritten)
 275 : t(Number), d(v), asWritten(asWritten)
 276 {
 277 }
 278
 279 QDeclarativeScript::Variant::Variant(QDeclarativeJS::AST::StringLiteral *v)
 280 : t(String), l(v)
 281 {
 282 }
 283
 284 QDeclarativeScript::Variant::Variant(const QStringRef &asWritten, QDeclarativeJS::AST::Node *n)
 285 : t(Script), n(n), asWritten(asWritten)
 286 {
 287 }
 288
 289 QDeclarativeScript::Variant &QDeclarativeScript::Variant::operator=(const Variant &o)
 290 {
 291     t = o.t;
 292     d = o.d;
 293     asWritten = o.asWritten;
 294     return *this;
 295 }
 296
 297 QDeclarativeScript::Variant::Type QDeclarativeScript::Variant::type() const
 298 {
 299     return t;
 300 }
 301
 302 bool QDeclarativeScript::Variant::asBoolean() const
 303 {
 304     return b;
 305 }
 306
 307 QString QDeclarativeScript::Variant::asString() const
 308 {
 309     if (t == String) {
 310         return l->value.toString();
 311     } else {
 312         return asWritten.toString();
 313     }
 314 }
 315
 316 double QDeclarativeScript::Variant::asNumber() const
 317 {
 318     return d;
 319 }
 320
 321 //reverse of Lexer::singleEscape()
 322 QString escapedString(const QString &string)
 323 {
 324     QString tmp = QLatin1String("\"");
 325     for (int i = 0; i < string.length(); ++i) {
 326         const QChar &c = string.at(i);
 327         switch(c.unicode()) {
 328         case 0x08:
 329             tmp += QLatin1String("\\b");
 330             break;
 331         case 0x09:
 332             tmp += QLatin1String("\\t");
 333             break;
 334         case 0x0A:
 335             tmp += QLatin1String("\\n");
 336             break;
 337         case 0x0B:
 338             tmp += QLatin1String("\\v");
 339             break;
 340         case 0x0C:
 341             tmp += QLatin1String("\\f");
 342             break;
 343         case 0x0D:
 344             tmp += QLatin1String("\\r");
 345             break;
 346         case 0x22:
 347             tmp += QLatin1String("\\\"");
 348             break;
 349         case 0x27:
 350             tmp += QLatin1String("\\\'");
 351             break;
 352         case 0x5C:
 353             tmp += QLatin1String("\\\\");
 354             break;
 355         default:
 356             tmp += c;
 357             break;
 358         }
 359     }
 360     tmp += QLatin1Char('\"');
 361     return tmp;
 362 }
 363
 364 QString QDeclarativeScript::Variant::asScript() const
 365 {
 366     switch(type()) {
 367     default:
 368     case Invalid:
 369         return QString();
 370     case Boolean:
 371         return b?QLatin1String("true"):QLatin1String("false");
 372     case Number:
 373         if (asWritten.isEmpty())
 374             return QString::number(d);
 375         else
 376             return asWritten.toString();
 377     case String:
 378         return escapedString(asString());
 379     case Script:
 380         if (AST::IdentifierExpression *i = AST::cast<AST::IdentifierExpression *>(n)) {
 381             return i->name.toString();
 382         } else
 383             return asWritten.toString();
 384     }
 385 }
 386
 387 QDeclarativeJS::AST::Node *QDeclarativeScript::Variant::asAST() const
 388 {
 389     if (type() == Script)
 390         return n;
 391     else
 392         return 0;
 393 }
 394
 395 bool QDeclarativeScript::Variant::isStringList() const
 396 {
 397     if (isString())
 398         return true;
 399
 400     if (type() != Script || !n)
 401         return false;
 402
 403     AST::ArrayLiteral *array = AST::cast<AST::ArrayLiteral *>(n);
 404     if (!array)
 405         return false;
 406
 407     AST::ElementList *elements = array->elements;
 408
 409     while (elements) {
 410
 411         if (!AST::cast<AST::StringLiteral *>(elements->expression))
 412             return false;
 413
 414         elements = elements->next;
 415     }
 416
 417     return true;
 418 }
 419
 420 QStringList QDeclarativeScript::Variant::asStringList() const
 421 {
 422     QStringList rv;
 423     if (isString()) {
 424         rv << asString();
 425         return rv;
 426     }
 427
 428     AST::ArrayLiteral *array = AST::cast<AST::ArrayLiteral *>(n);
 429     if (!array)
 430         return rv;
 431
 432     AST::ElementList *elements = array->elements;
 433     while (elements) {
 434
 435         AST::StringLiteral *string = AST::cast<AST::StringLiteral *>(elements->expression);
 436         if (!string)
 437             return QStringList();
 438         rv.append(string->value.toString());
 439
 440         elements = elements->next;
 441     }
 442
 443     return  rv;
 444 }
 445
 446 //
 447 // Actual parser classes
 448 //
 449 void QDeclarativeScript::Import::extractVersion(int *maj, int *min) const
 450 {
 451     *maj = -1; *min = -1;
 452
 453     if (!version.isEmpty()) {
 454         int dot = version.indexOf(QLatin1Char('.'));
 455         if (dot < 0) {
 456             *maj = version.toInt();
 457             *min = 0;
 458         } else {
 459             *maj = version.left(dot).toInt();
 460             *min = version.mid(dot+1).toInt();
 461         }
 462     }
 463 }
 464
 465 namespace {
 466
 467 class ProcessAST: protected AST::Visitor
 468 {
 469     struct State {
 470         State() : object(0), property(0) {}
 471         State(QDeclarativeScript::Object *o) : object(o), property(0) {}
 472         State(QDeclarativeScript::Object *o, Property *p) : object(o), property(p) {}
 473
 474         QDeclarativeScript::Object *object;
 475         Property *property;
 476     };
 477
 478     struct StateStack : public QStack<State>
 479     {
 480         void pushObject(QDeclarativeScript::Object *obj)
 481         {
 482             push(State(obj));
 483         }
 484
 485         void pushProperty(const QString &name, const LocationSpan &location)
 486         {
 487             const State &state = top();
 488             if (state.property) {
 489                 State s(state.property->getValue(location),
 490                         state.property->getValue(location)->getProperty(name));
 491                 s.property->location = location;
 492                 push(s);
 493             } else {
 494                 State s(state.object, state.object->getProperty(name));
 495
 496                 s.property->location = location;
 497                 push(s);
 498             }
 499         }
 500
 501         void pushProperty(const QStringRef &name, const LocationSpan &location)
 502         {
 503             const State &state = top();
 504             if (state.property) {
 505                 State s(state.property->getValue(location),
 506                         state.property->getValue(location)->getProperty(name));
 507                 s.property->location = location;
 508                 push(s);
 509             } else {
 510                 State s(state.object, state.object->getProperty(name));
 511
 512                 s.property->location = location;
 513                 push(s);
 514             }
 515         }
 516     };
 517
 518 public:
 519     ProcessAST(QDeclarativeScript::Parser *parser);
 520     virtual ~ProcessAST();
 521
 522     void operator()(const QString &code, AST::Node *node);
 523
 524 protected:
 525
 526     QDeclarativeScript::Object *defineObjectBinding(AST::UiQualifiedId *propertyName, bool onAssignment,
 527                                 const QString &objectType,
 528                                 AST::SourceLocation typeLocation,
 529                                 LocationSpan location,
 530                                 AST::UiObjectInitializer *initializer = 0);
 531
 532     QDeclarativeScript::Variant getVariant(AST::Statement *stmt);
 533     QDeclarativeScript::Variant getVariant(AST::ExpressionNode *expr);
 534
 535     LocationSpan location(AST::SourceLocation start, AST::SourceLocation end);
 536     LocationSpan location(AST::UiQualifiedId *);
 537
 538     using AST::Visitor::visit;
 539     using AST::Visitor::endVisit;
 540
 541     virtual bool visit(AST::UiProgram *node);
 542     virtual bool visit(AST::UiImport *node);
 543     virtual bool visit(AST::UiObjectDefinition *node);
 544     virtual bool visit(AST::UiPublicMember *node);
 545     virtual bool visit(AST::UiObjectBinding *node);
 546
 547     virtual bool visit(AST::UiScriptBinding *node);
 548     virtual bool visit(AST::UiArrayBinding *node);
 549     virtual bool visit(AST::UiSourceElement *node);
 550
 551     void accept(AST::Node *node);
 552
 553     QString asString(AST::UiQualifiedId *node) const;
 554
 555     const State state() const;
 556     QDeclarativeScript::Object *currentObject() const;
 557     Property *currentProperty() const;
 558
 559     QString qualifiedNameId() const;
 560
 561     QString textAt(const AST::SourceLocation &loc) const
 562     { return _contents->mid(loc.offset, loc.length); }
 563
 564     QStringRef textRefAt(const AST::SourceLocation &loc) const
 565     { return QStringRef(_contents, loc.offset, loc.length); }
 566
 567     QString textAt(const AST::SourceLocation &first,
 568                    const AST::SourceLocation &last) const
 569     { return _contents->mid(first.offset, last.offset + last.length - first.offset); }
 570
 571     QStringRef textRefAt(const AST::SourceLocation &first,
 572                          const AST::SourceLocation &last) const
 573     { return QStringRef(_contents, first.offset, last.offset + last.length - first.offset); }
 574
 575     QString asString(AST::ExpressionNode *expr)
 576     {
 577         if (! expr)
 578             return QString();
 579
 580         return textAt(expr->firstSourceLocation(), expr->lastSourceLocation());
 581     }
 582
 583     QStringRef asStringRef(AST::ExpressionNode *expr)
 584     {
 585         if (! expr)
 586             return QStringRef();
 587
 588         return textRefAt(expr->firstSourceLocation(), expr->lastSourceLocation());
 589     }
 590
 591     QString asString(AST::Statement *stmt)
 592     {
 593         if (! stmt)
 594             return QString();
 595
 596         QString s = textAt(stmt->firstSourceLocation(), stmt->lastSourceLocation());
 597         s += QLatin1Char('\n');
 598         return s;
 599     }
 600
 601     QStringRef asStringRef(AST::Statement *stmt)
 602     {
 603         if (! stmt)
 604             return QStringRef();
 605
 606         return textRefAt(stmt->firstSourceLocation(), stmt->lastSourceLocation());
 607     }
 608
 609 private:
 610     QDeclarativeScript::Parser *_parser;
 611     StateStack _stateStack;
 612     QStringList _scope;
 613     const QString *_contents;
 614 };
 615
 616 ProcessAST::ProcessAST(QDeclarativeScript::Parser *parser)
 617     : _parser(parser)
 618 {
 619 }
 620
 621 ProcessAST::~ProcessAST()
 622 {
 623 }
 624
 625 void ProcessAST::operator()(const QString &code, AST::Node *node)
 626 {
 627     _contents = &code;
 628     accept(node);
 629 }
 630
 631 void ProcessAST::accept(AST::Node *node)
 632 {
 633     AST::Node::acceptChild(node, this);
 634 }
 635
 636 const ProcessAST::State ProcessAST::state() const
 637 {
 638     if (_stateStack.isEmpty())
 639         return State();
 640
 641     return _stateStack.back();
 642 }
 643
 644 QDeclarativeScript::Object *ProcessAST::currentObject() const
 645 {
 646     return state().object;
 647 }
 648
 649 Property *ProcessAST::currentProperty() const
 650 {
 651     return state().property;
 652 }
 653
 654 QString ProcessAST::qualifiedNameId() const
 655 {
 656     return _scope.join(QLatin1String("/"));
 657 }
 658
 659 QString ProcessAST::asString(AST::UiQualifiedId *node) const
 660 {
 661     QString s;
 662
 663     for (AST::UiQualifiedId *it = node; it; it = it->next) {
 664         s.append(it->name.toString());
 665
 666         if (it->next)
 667             s.append(QLatin1Char('.'));
 668     }
 669
 670     return s;
 671 }
 672
 673 QDeclarativeScript::Object *
 674 ProcessAST::defineObjectBinding(AST::UiQualifiedId *propertyName,
 675                                 bool onAssignment,
 676                                 const QString &objectType,
 677                                 AST::SourceLocation typeLocation,
 678                                 LocationSpan location,
 679                                 AST::UiObjectInitializer *initializer)
 680 {
 681     int lastTypeDot = objectType.lastIndexOf(QLatin1Char('.'));
 682
 683     // With no preceding qualification, first char is at (-1 + 1) == 0
 684     bool isType = !objectType.isEmpty() && objectType.at(lastTypeDot+1).isUpper();
 685
 686     int propertyCount = 0;
 687     for (AST::UiQualifiedId *name = propertyName; name; name = name->next){
 688         ++propertyCount;
 689         _stateStack.pushProperty(name->name,
 690                                  this->location(name));
 691     }
 692
 693     if (!onAssignment && propertyCount && currentProperty() && !currentProperty()->values.isEmpty()) {
 694         QDeclarativeError error;
 695         error.setDescription(QCoreApplication::translate("QDeclarativeParser","Property value set multiple times"));
 696         error.setLine(this->location(propertyName).start.line);
 697         error.setColumn(this->location(propertyName).start.column);
 698         _parser->_errors << error;
 699         return 0;
 700     }
 701
 702     if (!isType) {
 703
 704         // Is the identifier qualified by a namespace?
 705         int namespaceLength = 0;
 706         if (lastTypeDot > 0) {
 707             const QString qualifier(objectType.left(lastTypeDot));
 708
 709             for (int ii = 0; ii < _parser->_imports.count(); ++ii) {
 710                 const QDeclarativeScript::Import &import = _parser->_imports.at(ii);
 711                 if (import.qualifier == qualifier) {
 712                     // The qualifier is a namespace - expect a type here
 713                     namespaceLength = qualifier.length() + 1;
 714                     break;
 715                 }
 716             }
 717         }
 718
 719         if (propertyCount || !currentObject() || namespaceLength) {
 720             QDeclarativeError error;
 721             error.setDescription(QCoreApplication::translate("QDeclarativeParser","Expected type name"));
 722             error.setLine(typeLocation.startLine);
 723             error.setColumn(typeLocation.startColumn + namespaceLength);
 724             _parser->_errors << error;
 725             return 0;
 726         }
 727
 728         LocationSpan loc = ProcessAST::location(typeLocation, typeLocation);
 729         if (propertyName)
 730             loc = ProcessAST::location(propertyName);
 731
 732         _stateStack.pushProperty(objectType, loc);
 733        accept(initializer);
 734         _stateStack.pop();
 735
 736         return 0;
 737
 738     } else {
 739         // Class
 740
 741         QString resolvableObjectType = objectType;
 742         if (lastTypeDot >= 0)
 743             resolvableObjectType.replace(QLatin1Char('.'),QLatin1Char('/'));
 744
 745         QDeclarativeScript::Object *obj = _parser->_pool.New<QDeclarativeScript::Object>();
 746
 747         QDeclarativeScript::TypeReference *typeRef = _parser->findOrCreateType(resolvableObjectType);
 748         obj->type = typeRef->id;
 749
 750         typeRef->refObjects.append(obj);
 751
 752         // XXX this doesn't do anything (_scope never builds up)
 753         _scope.append(resolvableObjectType);
 754         obj->typeName = qualifiedNameId();
 755         _scope.removeLast();
 756
 757         obj->location = location;
 758
 759         if (propertyCount) {
 760             Property *prop = currentProperty();
 761             QDeclarativeScript::Value *v = _parser->_pool.New<QDeclarativeScript::Value>();
 762             v->object = obj;
 763             v->location = obj->location;
 764             if (onAssignment)
 765                 prop->addOnValue(v);
 766             else
 767                 prop->addValue(v);
 768
 769             while (propertyCount--)
 770                 _stateStack.pop();
 771
 772         } else {
 773
 774             if (! _parser->tree()) {
 775                 _parser->setTree(obj);
 776             } else {
 777                 const State state = _stateStack.top();
 778                 QDeclarativeScript::Value *v = _parser->_pool.New<QDeclarativeScript::Value>();
 779                 v->object = obj;
 780                 v->location = obj->location;
 781                 if (state.property) {
 782                     state.property->addValue(v);
 783                 } else {
 784                     Property *defaultProp = state.object->getDefaultProperty();
 785                     if (defaultProp->location.start.line == -1) {
 786                         defaultProp->location = v->location;
 787                         defaultProp->location.end = defaultProp->location.start;
 788                         defaultProp->location.range.length = 0;
 789                     }
 790                     defaultProp->addValue(v);
 791                 }
 792             }
 793         }
 794
 795         _stateStack.pushObject(obj);
 796         accept(initializer);
 797         _stateStack.pop();
 798
 799         return obj;
 800     }
 801 }
 802
 803 LocationSpan ProcessAST::location(AST::UiQualifiedId *id)
 804 {
 805     return location(id->identifierToken, id->identifierToken);
 806 }
 807
 808 LocationSpan ProcessAST::location(AST::SourceLocation start, AST::SourceLocation end)
 809 {
 810     LocationSpan rv;
 811     rv.start.line = start.startLine;
 812     rv.start.column = start.startColumn;
 813     rv.end.line = end.startLine;
 814     rv.end.column = end.startColumn + end.length - 1;
 815     rv.range.offset = start.offset;
 816     rv.range.length = end.offset + end.length - start.offset;
 817     return rv;
 818 }
 819
 820 // UiProgram: UiImportListOpt UiObjectMemberList ;
 821 bool ProcessAST::visit(AST::UiProgram *node)
 822 {
 823     accept(node->imports);
 824     accept(node->members->member);
 825     return false;
 826 }
 827
 828 // UiImport: T_IMPORT T_STRING_LITERAL ;
 829 bool ProcessAST::visit(AST::UiImport *node)
 830 {
 831     QString uri;
 832     QDeclarativeScript::Import import;
 833
 834     if (!node->fileName.isNull()) {
 835         uri = node->fileName.toString();
 836
 837         if (uri.endsWith(QLatin1String(".js"))) {
 838             import.type = QDeclarativeScript::Import::Script;
 839         } else {
 840             import.type = QDeclarativeScript::Import::File;
 841         }
 842     } else {
 843         import.type = QDeclarativeScript::Import::Library;
 844         uri = asString(node->importUri);
 845     }
 846
 847     AST::SourceLocation startLoc = node->importToken;
 848     AST::SourceLocation endLoc = node->semicolonToken;
 849
 850     // Qualifier
 851     if (!node->importId.isNull()) {
 852         import.qualifier = node->importId.toString();
 853         if (!import.qualifier.at(0).isUpper()) {
 854             QDeclarativeError error;
 855             error.setDescription(QCoreApplication::translate("QDeclarativeParser","Invalid import qualifier ID"));
 856             error.setLine(node->importIdToken.startLine);
 857             error.setColumn(node->importIdToken.startColumn);
 858             _parser->_errors << error;
 859             return false;
 860         }
 861         if (import.qualifier == QLatin1String("Qt")) {
 862             QDeclarativeError error;
 863             error.setDescription(QCoreApplication::translate("QDeclarativeParser","Reserved name \"Qt\" cannot be used as an qualifier"));
 864             error.setLine(node->importIdToken.startLine);
 865             error.setColumn(node->importIdToken.startColumn);
 866             _parser->_errors << error;
 867             return false;
 868         }
 869
 870         // Check for script qualifier clashes
 871         bool isScript = import.type == QDeclarativeScript::Import::Script;
 872         for (int ii = 0; ii < _parser->_imports.count(); ++ii) {
 873             const QDeclarativeScript::Import &other = _parser->_imports.at(ii);
 874             bool otherIsScript = other.type == QDeclarativeScript::Import::Script;
 875
 876             if ((isScript || otherIsScript) && import.qualifier == other.qualifier) {
 877                 QDeclarativeError error;
 878                 error.setDescription(QCoreApplication::translate("QDeclarativeParser","Script import qualifiers must be unique."));
 879                 error.setLine(node->importIdToken.startLine);
 880                 error.setColumn(node->importIdToken.startColumn);
 881                 _parser->_errors << error;
 882                 return false;
 883             }
 884         }
 885
 886     } else if (import.type == QDeclarativeScript::Import::Script) {
 887         QDeclarativeError error;
 888         error.setDescription(QCoreApplication::translate("QDeclarativeParser","Script import requires a qualifier"));
 889         error.setLine(node->fileNameToken.startLine);
 890         error.setColumn(node->fileNameToken.startColumn);
 891         _parser->_errors << error;
 892         return false;
 893     }
 894
 895     if (node->versionToken.isValid()) {
 896         import.version = textAt(node->versionToken);
 897     } else if (import.type == QDeclarativeScript::Import::Library) {
 898         QDeclarativeError error;
 899         error.setDescription(QCoreApplication::translate("QDeclarativeParser","Library import requires a version"));
 900         error.setLine(node->importIdToken.startLine);
 901         error.setColumn(node->importIdToken.startColumn);
 902         _parser->_errors << error;
 903         return false;
 904     }
 905
 906
 907     import.location = location(startLoc, endLoc);
 908     import.uri = uri;
 909
 910     _parser->_imports << import;
 911
 912     return false;
 913 }
 914
 915 bool ProcessAST::visit(AST::UiPublicMember *node)
 916 {
 917     static const struct TypeNameToType {
 918         const char *name;
 919         int nameLength;
 920         Object::DynamicProperty::Type type;
 921         const char *qtName;
 922         int qtNameLength;
 923     } propTypeNameToTypes[] = {
 924         { "int", strlen("int"), Object::DynamicProperty::Int, "int", strlen("int") },
 925         { "bool", strlen("bool"), Object::DynamicProperty::Bool, "bool", strlen("bool") },
 926         { "double", strlen("double"), Object::DynamicProperty::Real, "double", strlen("double") },
 927         { "real", strlen("real"), Object::DynamicProperty::Real, "qreal", strlen("qreal") },
 928         { "string", strlen("string"), Object::DynamicProperty::String, "QString", strlen("QString") },
 929         { "url", strlen("url"), Object::DynamicProperty::Url, "QUrl", strlen("QUrl") },
 930         { "color", strlen("color"), Object::DynamicProperty::Color, "QColor", strlen("QColor") },
 931         // Internally QTime, QDate and QDateTime are all supported.
 932         // To be more consistent with JavaScript we expose only
 933         // QDateTime as it matches closely with the Date JS type.
 934         // We also call it "date" to match.
 935         // { "time", strlen("time"), Object::DynamicProperty::Time, "QTime", strlen("QTime") },
 936         // { "date", strlen("date"), Object::DynamicProperty::Date, "QDate", strlen("QDate") },
 937         { "date", strlen("date"), Object::DynamicProperty::DateTime, "QDateTime", strlen("QDateTime") },
 938         { "variant", strlen("variant"), Object::DynamicProperty::Variant, "QVariant", strlen("QVariant") },
 939         { "var", strlen("var"), Object::DynamicProperty::Var, "QVariant", strlen("QVariant") }
 940     };
 941     static const int propTypeNameToTypesCount = sizeof(propTypeNameToTypes) /
 942                                                 sizeof(propTypeNameToTypes[0]);
 943
 944     if(node->type == AST::UiPublicMember::Signal) {
 945         Object::DynamicSignal *signal = _parser->_pool.New<Object::DynamicSignal>();
 946         signal->name = node->name;
 947
 948         AST::UiParameterList *p = node->parameters;
 949         int paramLength = 0;
 950         while (p) { paramLength++; p = p->next; }
 951         p = node->parameters;
 952
 953         if (paramLength) {
 954             signal->parameterTypes = _parser->_pool.NewRawList<QHashedCStringRef>(paramLength);
 955             signal->parameterNames = _parser->_pool.NewRawList<QHashedStringRef>(paramLength);
 956         }
 957
 958         int index = 0;
 959         while (p) {
 960             const QStringRef &memberType = p->type;
 961
 962             const TypeNameToType *type = 0;
 963             for(int typeIndex = 0; typeIndex < propTypeNameToTypesCount; ++typeIndex) {
 964                 const TypeNameToType *t = propTypeNameToTypes + typeIndex;
 965                 if (t->nameLength == memberType.length() &&
 966                     QHashedString::compare(memberType.constData(), t->name, t->nameLength)) {
 967                     type = t;
 968                     break;
 969                 }
 970             }
 971
 972             if (!type) {
 973                 QDeclarativeError error;
 974                 error.setDescription(QCoreApplication::translate("QDeclarativeParser","Expected parameter type"));
 975                 error.setLine(node->typeToken.startLine);
 976                 error.setColumn(node->typeToken.startColumn);
 977                 _parser->_errors << error;
 978                 return false;
 979             }
 980
 981             signal->parameterTypes[index] = QHashedCStringRef(type->qtName, type->qtNameLength);
 982             signal->parameterNames[index] = QHashedStringRef(p->name);
 983             p = p->next;
 984             index++;
 985         }
 986
 987         signal->location = location(node->typeToken, node->semicolonToken);
 988         _stateStack.top().object->dynamicSignals.append(signal);
 989     } else {
 990         const QStringRef &memberType = node->memberType;
 991         const QStringRef &name = node->name;
 992
 993         bool typeFound = false;
 994         Object::DynamicProperty::Type type;
 995
 996         if ((unsigned)memberType.length() == strlen("alias") &&
 997             QHashedString::compare(memberType.constData(), "alias", strlen("alias"))) {
 998             type = Object::DynamicProperty::Alias;
 999             typeFound = true;
1000         }
1001
1002         for(int ii = 0; !typeFound && ii < propTypeNameToTypesCount; ++ii) {
1003             const TypeNameToType *t = propTypeNameToTypes + ii;
1004             if (t->nameLength == memberType.length() &&
1005                 QHashedString::compare(memberType.constData(), t->name, t->nameLength)) {
1006                 type = t->type;
1007                 typeFound = true;
1008             }
1009         }
1010
1011         if (!typeFound && memberType.at(0).isUpper()) {
1012             const QStringRef &typeModifier = node->typeModifier;
1013
1014             if (typeModifier.isEmpty()) {
1015                 type = Object::DynamicProperty::Custom;
1016             } else if((unsigned)typeModifier.length() == strlen("list") &&
1017                       QHashedString::compare(typeModifier.constData(), "list", strlen("list"))) {
1018                 type = Object::DynamicProperty::CustomList;
1019             } else {
1020                 QDeclarativeError error;
1021                 error.setDescription(QCoreApplication::translate("QDeclarativeParser","Invalid property type modifier"));
1022                 error.setLine(node->typeModifierToken.startLine);
1023                 error.setColumn(node->typeModifierToken.startColumn);
1024                 _parser->_errors << error;
1025                 return false;
1026             }
1027             typeFound = true;
1028         } else if (!node->typeModifier.isNull()) {
1029             QDeclarativeError error;
1030             error.setDescription(QCoreApplication::translate("QDeclarativeParser","Unexpected property type modifier"));
1031             error.setLine(node->typeModifierToken.startLine);
1032             error.setColumn(node->typeModifierToken.startColumn);
1033             _parser->_errors << error;
1034             return false;
1035         }
1036
1037         if(!typeFound) {
1038             QDeclarativeError error;
1039             error.setDescription(QCoreApplication::translate("QDeclarativeParser","Expected property type"));
1040             error.setLine(node->typeToken.startLine);
1041             error.setColumn(node->typeToken.startColumn);
1042             _parser->_errors << error;
1043             return false;
1044         }
1045
1046         Object::DynamicProperty *property = _parser->_pool.New<Object::DynamicProperty>();
1047         property->isDefaultProperty = node->isDefaultMember;
1048         property->isReadOnly = node->isReadonlyMember;
1049         property->type = type;
1050         property->nameLocation.line = node->identifierToken.startLine;
1051         property->nameLocation.column = node->identifierToken.startColumn;
1052         if (type >= Object::DynamicProperty::Custom) {
1053             QDeclarativeScript::TypeReference *typeRef =
1054                 _parser->findOrCreateType(memberType.toString());
1055             typeRef->refObjects.append(_stateStack.top().object);
1056             property->customType = memberType;
1057         }
1058
1059         property->name = QHashedStringRef(name);
1060         property->location = location(node->firstSourceLocation(),
1061                                       node->lastSourceLocation());
1062
1063         if (node->statement) { // default value
1064             property->defaultValue = _parser->_pool.New<Property>();
1065             property->defaultValue->parent = _stateStack.top().object;
1066             property->defaultValue->location =
1067                     location(node->statement->firstSourceLocation(),
1068                              node->statement->lastSourceLocation());
1069             QDeclarativeScript::Value *value = _parser->_pool.New<QDeclarativeScript::Value>();
1070             value->location = location(node->statement->firstSourceLocation(),
1071                                        node->statement->lastSourceLocation());
1072             value->value = getVariant(node->statement);
1073             property->defaultValue->values.append(value);
1074         }
1075
1076         _stateStack.top().object->dynamicProperties.append(property);
1077
1078         // process QML-like initializers (e.g. property Object o: Object {})
1079         accept(node->binding);
1080     }
1081
1082     return false;
1083 }
1084
1085
1086 // UiObjectMember: UiQualifiedId UiObjectInitializer ;
1087 bool ProcessAST::visit(AST::UiObjectDefinition *node)
1088 {
1089     LocationSpan l = location(node->firstSourceLocation(),
1090                               node->lastSourceLocation());
1091
1092     const QString objectType = asString(node->qualifiedTypeNameId);
1093     const AST::SourceLocation typeLocation = node->qualifiedTypeNameId->identifierToken;
1094
1095     defineObjectBinding(/*propertyName = */ 0, false, objectType,
1096                         typeLocation, l, node->initializer);
1097
1098     return false;
1099 }
1100
1101
1102 // UiObjectMember: UiQualifiedId T_COLON UiQualifiedId UiObjectInitializer ;
1103 bool ProcessAST::visit(AST::UiObjectBinding *node)
1104 {
1105     LocationSpan l = location(node->qualifiedTypeNameId->identifierToken,
1106                               node->initializer->rbraceToken);
1107
1108     const QString objectType = asString(node->qualifiedTypeNameId);
1109     const AST::SourceLocation typeLocation = node->qualifiedTypeNameId->identifierToken;
1110
1111     defineObjectBinding(node->qualifiedId, node->hasOnToken, objectType,
1112                         typeLocation, l, node->initializer);
1113
1114     return false;
1115 }
1116
1117 QDeclarativeScript::Variant ProcessAST::getVariant(AST::Statement *stmt)
1118 {
1119     if (stmt) {
1120         if (AST::ExpressionStatement *exprStmt = AST::cast<AST::ExpressionStatement *>(stmt))
1121             return getVariant(exprStmt->expression);
1122
1123         return QDeclarativeScript::Variant(asStringRef(stmt), stmt);
1124     }
1125
1126     return QDeclarativeScript::Variant();
1127 }
1128
1129 QDeclarativeScript::Variant ProcessAST::getVariant(AST::ExpressionNode *expr)
1130 {
1131     if (AST::StringLiteral *lit = AST::cast<AST::StringLiteral *>(expr)) {
1132         return QDeclarativeScript::Variant(lit);
1133     } else if (expr->kind == AST::Node::Kind_TrueLiteral) {
1134         return QDeclarativeScript::Variant(true);
1135     } else if (expr->kind == AST::Node::Kind_FalseLiteral) {
1136         return QDeclarativeScript::Variant(false);
1137     } else if (AST::NumericLiteral *lit = AST::cast<AST::NumericLiteral *>(expr)) {
1138         return QDeclarativeScript::Variant(lit->value, asStringRef(expr));
1139     } else {
1140
1141         if (AST::UnaryMinusExpression *unaryMinus = AST::cast<AST::UnaryMinusExpression *>(expr)) {
1142            if (AST::NumericLiteral *lit = AST::cast<AST::NumericLiteral *>(unaryMinus->expression)) {
1143                return QDeclarativeScript::Variant(-lit->value, asStringRef(expr));
1144            }
1145         }
1146
1147         return  QDeclarativeScript::Variant(asStringRef(expr), expr);
1148     }
1149 }
1150
1151
1152 // UiObjectMember: UiQualifiedId T_COLON Statement ;
1153 bool ProcessAST::visit(AST::UiScriptBinding *node)
1154 {
1155     int propertyCount = 0;
1156     AST::UiQualifiedId *propertyName = node->qualifiedId;
1157     for (AST::UiQualifiedId *name = propertyName; name; name = name->next){
1158         ++propertyCount;
1159         _stateStack.pushProperty(name->name,
1160                                  location(name));
1161     }
1162
1163     Property *prop = currentProperty();
1164
1165     if (!prop->values.isEmpty()) {
1166         QDeclarativeError error;
1167         error.setDescription(QCoreApplication::translate("QDeclarativeParser","Property value set multiple times"));
1168         error.setLine(this->location(propertyName).start.line);
1169         error.setColumn(this->location(propertyName).start.column);
1170         _parser->_errors << error;
1171         return 0;
1172     }
1173
1174     QDeclarativeScript::Variant primitive;
1175
1176     if (AST::ExpressionStatement *stmt = AST::cast<AST::ExpressionStatement *>(node->statement)) {
1177         primitive = getVariant(stmt->expression);
1178     } else { // do binding
1179         primitive = QDeclarativeScript::Variant(asStringRef(node->statement), node->statement);
1180     }
1181
1182     prop->location.range.length = prop->location.range.offset + prop->location.range.length - node->qualifiedId->identifierToken.offset;
1183     prop->location.range.offset = node->qualifiedId->identifierToken.offset;
1184     QDeclarativeScript::Value *v = _parser->_pool.New<QDeclarativeScript::Value>();
1185     v->value = primitive;
1186     v->location = location(node->statement->firstSourceLocation(),
1187                            node->statement->lastSourceLocation());
1188
1189     prop->addValue(v);
1190
1191     while (propertyCount--)
1192         _stateStack.pop();
1193
1194     return false;
1195 }
1196
1197 // UiObjectMember: UiQualifiedId T_COLON T_LBRACKET UiArrayMemberList T_RBRACKET ;
1198 bool ProcessAST::visit(AST::UiArrayBinding *node)
1199 {
1200     int propertyCount = 0;
1201     AST::UiQualifiedId *propertyName = node->qualifiedId;
1202     for (AST::UiQualifiedId *name = propertyName; name; name = name->next){
1203         ++propertyCount;
1204         _stateStack.pushProperty(name->name,
1205                                  location(name));
1206     }
1207
1208     Property* prop = currentProperty();
1209
1210     if (!prop->values.isEmpty()) {
1211         QDeclarativeError error;
1212         error.setDescription(QCoreApplication::translate("QDeclarativeParser","Property value set multiple times"));
1213         error.setLine(this->location(propertyName).start.line);
1214         error.setColumn(this->location(propertyName).start.column);
1215         _parser->_errors << error;
1216         return false;
1217     }
1218
1219     accept(node->members);
1220
1221     // For the DOM, store the position of the T_LBRACKET upto the T_RBRACKET as the range:
1222     prop->listValueRange.offset = node->lbracketToken.offset;
1223     prop->listValueRange.length = node->rbracketToken.offset + node->rbracketToken.length - node->lbracketToken.offset;
1224
1225     while (propertyCount--)
1226         _stateStack.pop();
1227
1228     return false;
1229 }
1230
1231 bool ProcessAST::visit(AST::UiSourceElement *node)
1232 {
1233     QDeclarativeScript::Object *obj = currentObject();
1234
1235     if (AST::FunctionDeclaration *funDecl = AST::cast<AST::FunctionDeclaration *>(node->sourceElement)) {
1236
1237         Object::DynamicSlot *slot = _parser->_pool.New<Object::DynamicSlot>();
1238         slot->location = location(funDecl->identifierToken, funDecl->lastSourceLocation());
1239
1240         AST::FormalParameterList *f = funDecl->formals;
1241         while (f) {
1242             slot->parameterNames << f->name.toUtf8();
1243             f = f->next;
1244         }
1245
1246         AST::SourceLocation loc = funDecl->rparenToken;
1247         loc.offset = loc.end();
1248         loc.startColumn += 1;
1249         QString body = textAt(loc, funDecl->rbraceToken);
1250         slot->name = funDecl->name;
1251         slot->body = body;
1252         obj->dynamicSlots.append(slot);
1253
1254     } else {
1255         QDeclarativeError error;
1256         error.setDescription(QCoreApplication::translate("QDeclarativeParser","JavaScript declaration outside Script element"));
1257         error.setLine(node->firstSourceLocation().startLine);
1258         error.setColumn(node->firstSourceLocation().startColumn);
1259         _parser->_errors << error;
1260     }
1261     return false;
1262 }
1263
1264 } // end of anonymous namespace
1265
1266
1267 QDeclarativeScript::Parser::Parser()
1268 : root(0), data(0)
1269 {
1270
1271 }
1272
1273 QDeclarativeScript::Parser::~Parser()
1274 {
1275     clear();
1276 }
1277
1278 namespace QDeclarativeScript {
1279 class ParserJsASTData
1280 {
1281 public:
1282     ParserJsASTData(const QString &filename)
1283     : filename(filename) {}
1284
1285     QString filename;
1286     Engine engine;
1287 };
1288 }
1289
1290 bool QDeclarativeScript::Parser::parse(const QByteArray &qmldata, const QUrl &url)
1291 {
1292     clear();
1293
1294     const QString fileName = url.toString();
1295     _scriptFile = fileName;
1296
1297     QTextStream stream(qmldata, QIODevice::ReadOnly);
1298 #ifndef QT_NO_TEXTCODEC
1299     stream.setCodec("UTF-8");
1300 #endif
1301     QString *code = _pool.NewString(stream.readAll());
1302
1303     data = new QDeclarativeScript::ParserJsASTData(fileName);
1304
1305     Lexer lexer(&data->engine);
1306     lexer.setCode(*code, /*line = */ 1);
1307
1308     QDeclarativeJS::Parser parser(&data->engine);
1309
1310     if (! parser.parse() || !_errors.isEmpty()) {
1311
1312         // Extract errors from the parser
1313         foreach (const DiagnosticMessage &m, parser.diagnosticMessages()) {
1314
1315             if (m.isWarning())
1316                 continue;
1317
1318             QDeclarativeError error;
1319             error.setUrl(url);
1320             error.setDescription(m.message);
1321             error.setLine(m.loc.startLine);
1322             error.setColumn(m.loc.startColumn);
1323             _errors << error;
1324
1325         }
1326     }
1327
1328     if (_errors.isEmpty()) {
1329         ProcessAST process(this);
1330         process(*code, parser.ast());
1331
1332         // Set the url for process errors
1333         for(int ii = 0; ii < _errors.count(); ++ii)
1334             _errors[ii].setUrl(url);
1335     }
1336
1337     return _errors.isEmpty();
1338 }
1339
1340 QList<QDeclarativeScript::TypeReference*> QDeclarativeScript::Parser::referencedTypes() const
1341 {
1342     return _refTypes;
1343 }
1344
1345 QDeclarativeScript::Object *QDeclarativeScript::Parser::tree() const
1346 {
1347     return root;
1348 }
1349
1350 QList<QDeclarativeScript::Import> QDeclarativeScript::Parser::imports() const
1351 {
1352     return _imports;
1353 }
1354
1355 QList<QDeclarativeError> QDeclarativeScript::Parser::errors() const
1356 {
1357     return _errors;
1358 }
1359
1360 static void replaceWithSpace(QString &str, int idx, int n)
1361 {
1362     QChar *data = str.data() + idx;
1363     const QChar space(QLatin1Char(' '));
1364     for (int ii = 0; ii < n; ++ii)
1365         *data++ = space;
1366 }
1367
1368 static QDeclarativeScript::LocationSpan
1369 locationFromLexer(const QDeclarativeJS::Lexer &lex, int startLine, int startColumn, int startOffset)
1370 {
1371     QDeclarativeScript::LocationSpan l;
1372
1373     l.start.line = startLine; l.start.column = startColumn;
1374     l.end.line = lex.tokenEndLine(); l.end.column = lex.tokenEndColumn();
1375     l.range.offset = startOffset;
1376     l.range.length = lex.tokenOffset() + lex.tokenLength() - startOffset;
1377
1378     return l;
1379 }
1380
1381 /*
1382 Searches for ".pragma <value>" declarations within \a script.  Currently supported pragmas
1383 are:
1384     library
1385 */
1386 QDeclarativeScript::Object::ScriptBlock::Pragmas QDeclarativeScript::Parser::extractPragmas(QString &script)
1387 {
1388     QDeclarativeScript::Object::ScriptBlock::Pragmas rv = QDeclarativeScript::Object::ScriptBlock::None;
1389
1390     const QString pragma(QLatin1String("pragma"));
1391     const QString library(QLatin1String("library"));
1392
1393     QDeclarativeJS::Lexer l(0);
1394     l.setCode(script, 0);
1395
1396     int token = l.lex();
1397
1398     while (true) {
1399         if (token != QDeclarativeJSGrammar::T_DOT)
1400             return rv;
1401
1402         int startOffset = l.tokenOffset();
1403         int startLine = l.tokenStartLine();
1404
1405         token = l.lex();
1406
1407         if (token != QDeclarativeJSGrammar::T_IDENTIFIER ||
1408             l.tokenStartLine() != startLine ||
1409             script.mid(l.tokenOffset(), l.tokenLength()) != pragma)
1410             return rv;
1411
1412         token = l.lex();
1413
1414         if (token != QDeclarativeJSGrammar::T_IDENTIFIER ||
1415             l.tokenStartLine() != startLine)
1416             return rv;
1417
1418         QString pragmaValue = script.mid(l.tokenOffset(), l.tokenLength());
1419         int endOffset = l.tokenLength() + l.tokenOffset();
1420
1421         token = l.lex();
1422         if (l.tokenStartLine() == startLine)
1423             return rv;
1424
1425         if (pragmaValue == library) {
1426             rv |= QDeclarativeScript::Object::ScriptBlock::Shared;
1427             replaceWithSpace(script, startOffset, endOffset - startOffset);
1428         } else {
1429             return rv;
1430         }
1431     }
1432     return rv;
1433 }
1434
1435 #define CHECK_LINE if (l.tokenStartLine() != startLine) return rv;
1436 #define CHECK_TOKEN(t) if (token != QDeclarativeJSGrammar:: t) return rv;
1437
1438 static const int uriTokens[] = {
1439     QDeclarativeJSGrammar::T_IDENTIFIER,
1440     QDeclarativeJSGrammar::T_PROPERTY,
1441     QDeclarativeJSGrammar::T_SIGNAL,
1442     QDeclarativeJSGrammar::T_READONLY,
1443     QDeclarativeJSGrammar::T_ON,
1444     QDeclarativeJSGrammar::T_BREAK,
1445     QDeclarativeJSGrammar::T_CASE,
1446     QDeclarativeJSGrammar::T_CATCH,
1447     QDeclarativeJSGrammar::T_CONTINUE,
1448     QDeclarativeJSGrammar::T_DEFAULT,
1449     QDeclarativeJSGrammar::T_DELETE,
1450     QDeclarativeJSGrammar::T_DO,
1451     QDeclarativeJSGrammar::T_ELSE,
1452     QDeclarativeJSGrammar::T_FALSE,
1453     QDeclarativeJSGrammar::T_FINALLY,
1454     QDeclarativeJSGrammar::T_FOR,
1455     QDeclarativeJSGrammar::T_FUNCTION,
1456     QDeclarativeJSGrammar::T_IF,
1457     QDeclarativeJSGrammar::T_IN,
1458     QDeclarativeJSGrammar::T_INSTANCEOF,
1459     QDeclarativeJSGrammar::T_NEW,
1460     QDeclarativeJSGrammar::T_NULL,
1461     QDeclarativeJSGrammar::T_RETURN,
1462     QDeclarativeJSGrammar::T_SWITCH,
1463     QDeclarativeJSGrammar::T_THIS,
1464     QDeclarativeJSGrammar::T_THROW,
1465     QDeclarativeJSGrammar::T_TRUE,
1466     QDeclarativeJSGrammar::T_TRY,
1467     QDeclarativeJSGrammar::T_TYPEOF,
1468     QDeclarativeJSGrammar::T_VAR,
1469     QDeclarativeJSGrammar::T_VOID,
1470     QDeclarativeJSGrammar::T_WHILE,
1471     QDeclarativeJSGrammar::T_CONST,
1472     QDeclarativeJSGrammar::T_DEBUGGER,
1473     QDeclarativeJSGrammar::T_RESERVED_WORD,
1474     QDeclarativeJSGrammar::T_WITH,
1475
1476     QDeclarativeJSGrammar::EOF_SYMBOL
1477 };
1478 static inline bool isUriToken(int token)
1479 {
1480     const int *current = uriTokens;
1481     while (*current != QDeclarativeJSGrammar::EOF_SYMBOL) {
1482         if (*current == token)
1483             return true;
1484         ++current;
1485     }
1486     return false;
1487 }
1488
1489 QDeclarativeScript::Parser::JavaScriptMetaData QDeclarativeScript::Parser::extractMetaData(QString &script)
1490 {
1491     JavaScriptMetaData rv;
1492
1493     QDeclarativeScript::Object::ScriptBlock::Pragmas &pragmas = rv.pragmas;
1494
1495     const QString pragma(QLatin1String("pragma"));
1496     const QString js(QLatin1String(".js"));
1497     const QString library(QLatin1String("library"));
1498
1499     QDeclarativeJS::Lexer l(0);
1500     l.setCode(script, 0);
1501
1502     int token = l.lex();
1503
1504     while (true) {
1505         if (token != QDeclarativeJSGrammar::T_DOT)
1506             return rv;
1507
1508         int startOffset = l.tokenOffset();
1509         int startLine = l.tokenStartLine();
1510         int startColumn = l.tokenStartColumn();
1511
1512         token = l.lex();
1513
1514         CHECK_LINE;
1515
1516         if (token == QDeclarativeJSGrammar::T_IMPORT) {
1517
1518             // .import <URI> <Version> as <Identifier>
1519             // .import <file.js> as <Identifier>
1520
1521             token = l.lex();
1522
1523             CHECK_LINE;
1524
1525             if (token == QDeclarativeJSGrammar::T_STRING_LITERAL) {
1526
1527                 QString file = l.tokenText();
1528
1529                 if (!file.endsWith(js))
1530                     return rv;
1531
1532                 token = l.lex();
1533
1534                 CHECK_TOKEN(T_AS);
1535                 CHECK_LINE;
1536
1537                 token = l.lex();
1538
1539                 CHECK_TOKEN(T_IDENTIFIER);
1540                 CHECK_LINE;
1541
1542                 int endOffset = l.tokenLength() + l.tokenOffset();
1543
1544                 QString importId = script.mid(l.tokenOffset(), l.tokenLength());
1545
1546                 if (!importId.at(0).isUpper())
1547                     return rv;
1548
1549                 QDeclarativeScript::LocationSpan location =
1550                     locationFromLexer(l, startLine, startColumn, startOffset);
1551
1552                 token = l.lex();
1553                 if (l.tokenStartLine() == startLine)
1554                     return rv;
1555
1556                 replaceWithSpace(script, startOffset, endOffset - startOffset);
1557
1558                 Import import;
1559                 import.type = Import::Script;
1560                 import.uri = file;
1561                 import.qualifier = importId;
1562                 import.location = location;
1563
1564                 rv.imports << import;
1565             } else {
1566                 // URI
1567                 QString uri;
1568                 QString version;
1569
1570                 while (true) {
1571                     if (!isUriToken(token))
1572                         return rv;
1573
1574                     uri.append(l.tokenText());
1575
1576                     token = l.lex();
1577                     CHECK_LINE;
1578                     if (token != QDeclarativeJSGrammar::T_DOT)
1579                         break;
1580
1581                     uri.append(QLatin1Char('.'));
1582
1583                     token = l.lex();
1584                     CHECK_LINE;
1585                 }
1586
1587                 CHECK_TOKEN(T_NUMERIC_LITERAL);
1588                 version = script.mid(l.tokenOffset(), l.tokenLength());
1589
1590                 token = l.lex();
1591
1592                 CHECK_TOKEN(T_AS);
1593                 CHECK_LINE;
1594
1595                 token = l.lex();
1596
1597                 CHECK_TOKEN(T_IDENTIFIER);
1598                 CHECK_LINE;
1599
1600                 int endOffset = l.tokenLength() + l.tokenOffset();
1601
1602                 QString importId = script.mid(l.tokenOffset(), l.tokenLength());
1603
1604                 if (!importId.at(0).isUpper())
1605                     return rv;
1606
1607                 QDeclarativeScript::LocationSpan location =
1608                     locationFromLexer(l, startLine, startColumn, startOffset);
1609
1610                 token = l.lex();
1611                 if (l.tokenStartLine() == startLine)
1612                     return rv;
1613
1614                 replaceWithSpace(script, startOffset, endOffset - startOffset);
1615
1616                 Import import;
1617                 import.type = Import::Library;
1618                 import.uri = uri;
1619                 import.version = version;
1620                 import.qualifier = importId;
1621                 import.location = location;
1622
1623                 rv.imports << import;
1624             }
1625
1626         } else if (token == QDeclarativeJSGrammar::T_IDENTIFIER &&
1627                    script.mid(l.tokenOffset(), l.tokenLength()) == pragma) {
1628
1629             token = l.lex();
1630
1631             CHECK_TOKEN(T_IDENTIFIER);
1632             CHECK_LINE;
1633
1634             QString pragmaValue = script.mid(l.tokenOffset(), l.tokenLength());
1635             int endOffset = l.tokenLength() + l.tokenOffset();
1636
1637             if (pragmaValue == library) {
1638                 pragmas |= QDeclarativeScript::Object::ScriptBlock::Shared;
1639                 replaceWithSpace(script, startOffset, endOffset - startOffset);
1640             } else {
1641                 return rv;
1642             }
1643
1644             token = l.lex();
1645             if (l.tokenStartLine() == startLine)
1646                 return rv;
1647
1648         } else {
1649             return rv;
1650         }
1651     }
1652     return rv;
1653 }
1654
1655 void QDeclarativeScript::Parser::clear()
1656 {
1657     _imports.clear();
1658     qDeleteAll(_refTypes);
1659     _refTypes.clear();
1660     _errors.clear();
1661
1662     if (data) {
1663         delete data;
1664         data = 0;
1665     }
1666
1667     _pool.clear();
1668 }
1669
1670 QDeclarativeScript::TypeReference *QDeclarativeScript::Parser::findOrCreateType(const QString &name)
1671 {
1672     TypeReference *type = 0;
1673     int i = 0;
1674     for (; i < _refTypes.size(); ++i) {
1675         if (_refTypes.at(i)->name == name) {
1676             type = _refTypes.at(i);
1677             break;
1678         }
1679     }
1680     if (!type) {
1681         type = new TypeReference(i, name);
1682         _refTypes.append(type);
1683     }
1684
1685     return type;
1686 }
1687
1688 void QDeclarativeScript::Parser::setTree(QDeclarativeScript::Object *tree)
1689 {
1690     Q_ASSERT(! root);
1691
1692     root = tree;
1693 }
1694
1695 QT_END_NAMESPACE