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
46 using namespace QV4;
47
48 DEFINE_OBJECT_VTABLE(MapIteratorObject);
49
init(ExecutionEngine * e)50 void MapIteratorPrototype::init(ExecutionEngine *e)
51 {
52 defineDefaultProperty(QStringLiteral("next"), method_next, 0);
53
54 Scope scope(e);
55 ScopedString val(scope, e->newString(QLatin1String("Map Iterator")));
56 defineReadonlyConfigurableProperty(e->symbol_toStringTag(), val);
57 }
58
method_next(const FunctionObject * b,const Value * that,const Value *,int)59 ReturnedValue 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(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(scope.engine, undefined, true);
73 }
74
75 Value *arguments = scope.alloc(2);
76
77 while (index < s->d()->esTable->size()) {
78 s->d()->esTable->iterate(index, &arguments[0], &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(2);
94 resultArray->arrayPut(0, arguments[0]);
95 resultArray->arrayPut(1, arguments[1]);
96 resultArray->setArrayLengthUnchecked(2);
97 }
98
99 return IteratorPrototype::createIterResultObject(scope.engine, result, false);
100 }
101
102 thisObject->d()->iteratedMap.set(scope.engine, nullptr);
103 QV4::Value undefined = Value::undefinedValue();
104 return IteratorPrototype::createIterResultObject(scope.engine, undefined, true);
105 }
106
107
108