| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtQml module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** GNU Lesser General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU Lesser |
| ** General Public License version 3 as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.LGPL3 included in the |
| ** packaging of this file. Please review the following information to |
| ** ensure the GNU Lesser General Public License version 3 requirements |
| ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
| ** Qt Foundation. The licenses are as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 |
| ** included in the packaging of this file. Please review the following |
| ** information to ensure the GNU General Public License requirements will |
| ** be met: https://www.gnu.org/licenses/gpl-2.0.html and |
| ** https://www.gnu.org/licenses/gpl-3.0.html. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| #include "qv4objectiterator_p.h" |
| #include "qv4object_p.h" |
| #include "qv4stringobject_p.h" |
| #include "qv4identifier_p.h" |
| #include "qv4argumentsobject_p.h" |
| #include "qv4string_p.h" |
| #include "qv4iterator_p.h" |
| #include "qv4propertykey_p.h" |
| |
| using namespace QV4; |
| |
| void ForInIteratorPrototype::init(ExecutionEngine *) |
| { |
| defineDefaultProperty(QStringLiteral("next"), method_next, 0); |
| } |
| |
| PropertyKey ObjectIterator::next(Property *pd, PropertyAttributes *attrs) |
| { |
| if (!object || !iterator) |
| return PropertyKey::invalid(); |
| |
| Scope scope(engine); |
| ScopedPropertyKey key(scope); |
| |
| while (1) { |
| key = iterator->next(object, pd, attrs); |
| if (!key->isValid()) { |
| object = nullptr; |
| return key; |
| } |
| if ((!(flags & WithSymbols) && key->isSymbol()) || |
| ((flags & EnumerableOnly) && !attrs->isEnumerable())) |
| continue; |
| return key; |
| } |
| } |
| |
| ReturnedValue ObjectIterator::nextPropertyName(Value *value) |
| { |
| if (!object) |
| return Encode::null(); |
| |
| PropertyAttributes attrs; |
| Scope scope(engine); |
| ScopedProperty p(scope); |
| ScopedPropertyKey key(scope, next(p, &attrs)); |
| if (!key->isValid()) |
| return Encode::null(); |
| |
| *value = object->getValue(p->value, attrs); |
| if (key->isArrayIndex()) |
| return Encode(key->asArrayIndex()); |
| Q_ASSERT(key->isStringOrSymbol()); |
| return key->asStringOrSymbol()->asReturnedValue(); |
| } |
| |
| ReturnedValue ObjectIterator::nextPropertyNameAsString(Value *value) |
| { |
| if (!object) |
| return Encode::null(); |
| |
| PropertyAttributes attrs; |
| Scope scope(engine); |
| ScopedProperty p(scope); |
| ScopedPropertyKey key(scope, next(p, &attrs)); |
| if (!key->isValid()) |
| return Encode::null(); |
| |
| *value = object->getValue(p->value, attrs); |
| |
| return key->toStringOrSymbol(engine)->asReturnedValue(); |
| } |
| |
| ReturnedValue ObjectIterator::nextPropertyNameAsString() |
| { |
| if (!object) |
| return Encode::null(); |
| |
| PropertyAttributes attrs; |
| Scope scope(engine); |
| ScopedPropertyKey key(scope, next(nullptr, &attrs)); |
| if (!key->isValid()) |
| return Encode::null(); |
| |
| return key->toStringOrSymbol(engine)->asReturnedValue(); |
| } |
| |
| |
| DEFINE_OBJECT_VTABLE(ForInIteratorObject); |
| |
| void Heap::ForInIteratorObject::markObjects(Heap::Base *that, MarkStack *markStack) |
| { |
| ForInIteratorObject *o = static_cast<ForInIteratorObject *>(that); |
| if (o->object) |
| o->object->mark(markStack); |
| if (o->current) |
| o->current->mark(markStack); |
| o->workArea[0].mark(markStack); |
| o->workArea[1].mark(markStack); |
| Object::markObjects(that, markStack); |
| } |
| |
| void Heap::ForInIteratorObject::destroy() |
| { |
| delete iterator; |
| } |
| |
| ReturnedValue ForInIteratorPrototype::method_next(const FunctionObject *b, const Value *thisObject, const Value *, int) |
| { |
| const ForInIteratorObject *forIn = static_cast<const ForInIteratorObject *>(thisObject); |
| Q_ASSERT(forIn); |
| Scope scope(b); |
| |
| ScopedPropertyKey key(scope, forIn->nextProperty()); |
| bool done = false; |
| if (!key->isValid()) |
| done = true; |
| ScopedStringOrSymbol s(scope, key->toStringOrSymbol(scope.engine)); |
| return IteratorPrototype::createIterResultObject(scope.engine, s, done); |
| } |
| |
| |
| PropertyKey ForInIteratorObject::nextProperty() const |
| { |
| if (!d()->current) |
| return PropertyKey::invalid(); |
| |
| Scope scope(this); |
| ScopedObject c(scope, d()->current); |
| ScopedObject t(scope, d()->target); |
| ScopedObject o(scope); |
| ScopedProperty p(scope); |
| ScopedPropertyKey key(scope); |
| PropertyAttributes attrs; |
| |
| while (1) { |
| while (1) { |
| key = d()->iterator->next(t, p, &attrs); |
| if (!key->isValid()) |
| break; |
| if (!attrs.isEnumerable() || key->isSymbol()) |
| continue; |
| // check the property is not already defined earlier in the proto chain |
| if (d()->current != d()->object) { |
| o = d()->object; |
| bool shadowed = false; |
| while (o && o->d() != c->heapObject()) { |
| if (o->getOwnProperty(key) != Attr_Invalid) { |
| shadowed = true; |
| break; |
| } |
| o = o->getPrototypeOf(); |
| } |
| if (shadowed) |
| continue; |
| } |
| return key; |
| } |
| |
| c = c->getPrototypeOf(); |
| d()->current.set(scope.engine, c->d()); |
| if (!c) |
| break; |
| delete d()->iterator; |
| d()->iterator = c->ownPropertyKeys(t.getRef()); |
| d()->target.set(scope.engine, t->d()); |
| if (!d()->iterator) { |
| scope.engine->throwTypeError(); |
| return PropertyKey::invalid(); |
| } |
| } |
| return PropertyKey::invalid(); |
| } |