1/****************************************************************************
2**
3** Copyright (C) 2018 Crimson AS <info@crimson.no>
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtQml module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#include <private/qv4iterator_p.h>
41#include <private/qv4estable_p.h>
42#include <private/qv4mapiterator_p.h>
43#include <private/qv4mapobject_p.h>
44#include <private/qv4symbol_p.h>
45
46using namespace QV4;
47
48DEFINE_OBJECT_VTABLE(MapIteratorObject);
49
50void MapIteratorPrototype::init(ExecutionEngine *e)
51{
52 defineDefaultProperty(QStringLiteral("next"), code: method_next, argumentCount: 0);
53
54 Scope scope(e);
55 ScopedString val(scope, e->newString(s: QLatin1String("Map Iterator")));
56 defineReadonlyConfigurableProperty(name: e->symbol_toStringTag(), value: val);
57}
58
59ReturnedValue MapIteratorPrototype::method_next(const FunctionObject *b, const Value *that, const Value *, int)
60{
61 Scope scope(b);
62 const MapIteratorObject *thisObject = that->as<MapIteratorObject>();
63 if (!thisObject)
64 return scope.engine->throwTypeError(message: QLatin1String("Not a Map Iterator instance"));
65
66 Scoped<MapObject> s(scope, thisObject->d()->iteratedMap);
67 uint index = thisObject->d()->mapNextIndex;
68 IteratorKind itemKind = thisObject->d()->iterationKind;
69
70 if (!s) {
71 QV4::Value undefined = Value::undefinedValue();
72 return IteratorPrototype::createIterResultObject(engine: scope.engine, value: undefined, done: true);
73 }
74
75 Value *arguments = scope.alloc(nValues: 2);
76
77 while (index < s->d()->esTable->size()) {
78 s->d()->esTable->iterate(idx: index, k: &arguments[0], v: &arguments[1]);
79 thisObject->d()->mapNextIndex = index + 1;
80
81 ScopedValue result(scope);
82
83 if (itemKind == KeyIteratorKind) {
84 result = arguments[0];
85 } else if (itemKind == ValueIteratorKind) {
86 result = arguments[1];
87 } else {
88 Q_ASSERT(itemKind == KeyValueIteratorKind);
89
90 result = scope.engine->newArrayObject();
91
92 Scoped<ArrayObject> resultArray(scope, result);
93 resultArray->arrayReserve(n: 2);
94 resultArray->arrayPut(index: 0, value: arguments[0]);
95 resultArray->arrayPut(index: 1, value: arguments[1]);
96 resultArray->setArrayLengthUnchecked(2);
97 }
98
99 return IteratorPrototype::createIterResultObject(engine: scope.engine, value: result, done: false);
100 }
101
102 thisObject->d()->iteratedMap.set(e: scope.engine, newVal: nullptr);
103 QV4::Value undefined = Value::undefinedValue();
104 return IteratorPrototype::createIterResultObject(engine: scope.engine, value: undefined, done: true);
105}
106
107
108

source code of qtdeclarative/src/qml/jsruntime/qv4mapiterator.cpp