1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtCore 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 "qresource.h"
41#include "qresource_iterator_p.h"
42
43#include <QtCore/qvariant.h>
44
45QT_BEGIN_NAMESPACE
46
47QResourceFileEngineIterator::QResourceFileEngineIterator(QDir::Filters filters,
48 const QStringList &filterNames)
49 : QAbstractFileEngineIterator(filters, filterNames), index(-1)
50{
51}
52
53QResourceFileEngineIterator::~QResourceFileEngineIterator()
54{
55}
56
57QString QResourceFileEngineIterator::next()
58{
59 if (!hasNext())
60 return QString();
61 ++index;
62 return currentFilePath();
63}
64
65bool QResourceFileEngineIterator::hasNext() const
66{
67 if (index == -1) {
68 // Lazy initialization of the iterator
69 QResource resource(path());
70 if (!resource.isValid())
71 return false;
72
73 // Initialize and move to the next entry.
74 entries = resource.children();
75 index = 0;
76 }
77
78 return index < entries.size();
79}
80
81QString QResourceFileEngineIterator::currentFileName() const
82{
83 if (index <= 0 || index > entries.size())
84 return QString();
85 return entries.at(i: index - 1);
86}
87
88QT_END_NAMESPACE
89

source code of qtbase/src/corelib/io/qresource_iterator.cpp