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 QtGui 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#ifndef QICONLOADER_P_H
41#define QICONLOADER_P_H
42
43#include <QtGui/private/qtguiglobal_p.h>
44
45#ifndef QT_NO_ICON
46//
47// W A R N I N G
48// -------------
49//
50// This file is not part of the Qt API. It exists purely as an
51// implementation detail. This header file may change from version to
52// version without notice, or even be removed.
53//
54// We mean it.
55//
56
57#include <QtGui/QIcon>
58#include <QtGui/QIconEngine>
59#include <QtGui/QPixmapCache>
60#include <private/qicon_p.h>
61#include <private/qfactoryloader_p.h>
62#include <QtCore/QHash>
63#include <QtCore/QList>
64#include <QtCore/QTypeInfo>
65
66QT_BEGIN_NAMESPACE
67
68class QIconLoader;
69
70struct QIconDirInfo
71{
72 enum Type { Fixed, Scalable, Threshold, Fallback };
73 QIconDirInfo(const QString &_path = QString()) :
74 path(_path),
75 size(0),
76 maxSize(0),
77 minSize(0),
78 threshold(0),
79 scale(1),
80 type(Threshold) {}
81 QString path;
82 short size;
83 short maxSize;
84 short minSize;
85 short threshold;
86 short scale;
87 Type type;
88};
89Q_DECLARE_TYPEINFO(QIconDirInfo, Q_MOVABLE_TYPE);
90
91class QIconLoaderEngineEntry
92 {
93public:
94 virtual ~QIconLoaderEngineEntry() {}
95 virtual QPixmap pixmap(const QSize &size,
96 QIcon::Mode mode,
97 QIcon::State state) = 0;
98 QString filename;
99 QIconDirInfo dir;
100};
101
102struct ScalableEntry : public QIconLoaderEngineEntry
103{
104 QPixmap pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state) override;
105 QIcon svgIcon;
106};
107
108struct PixmapEntry : public QIconLoaderEngineEntry
109{
110 QPixmap pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state) override;
111 QPixmap basePixmap;
112};
113
114typedef QList<QIconLoaderEngineEntry*> QThemeIconEntries;
115
116struct QThemeIconInfo
117{
118 QThemeIconEntries entries;
119 QString iconName;
120};
121
122class QIconLoaderEngine : public QIconEngine
123{
124public:
125 QIconLoaderEngine(const QString& iconName = QString());
126 ~QIconLoaderEngine();
127
128 void paint(QPainter *painter, const QRect &rect, QIcon::Mode mode, QIcon::State state) override;
129 QPixmap pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state) override;
130 QSize actualSize(const QSize &size, QIcon::Mode mode, QIcon::State state) override;
131 QIconEngine *clone() const override;
132 bool read(QDataStream &in) override;
133 bool write(QDataStream &out) const override;
134
135 QString iconName() override;
136 bool isNull() override;
137 QPixmap scaledPixmap(const QSize &size, QIcon::Mode mode, QIcon::State state, qreal scale) override;
138 QList<QSize> availableSizes(QIcon::Mode mode, QIcon::State state) override;
139
140 Q_GUI_EXPORT static QIconLoaderEngineEntry *entryForSize(const QThemeIconInfo &info, const QSize &size, int scale = 1);
141
142private:
143 QString key() const override;
144 bool hasIcon() const;
145 void ensureLoaded();
146
147 QIconLoaderEngine(const QIconLoaderEngine &other);
148 QThemeIconInfo m_info;
149 QString m_iconName;
150 uint m_key;
151
152 friend class QIconLoader;
153};
154
155class QIconCacheGtkReader;
156
157class QIconTheme
158{
159public:
160 QIconTheme(const QString &name);
161 QIconTheme() : m_valid(false) {}
162 QStringList parents() { return m_parents; }
163 QList<QIconDirInfo> keyList() { return m_keyList; }
164 QStringList contentDirs() { return m_contentDirs; }
165 bool isValid() { return m_valid; }
166private:
167 QStringList m_contentDirs;
168 QList<QIconDirInfo> m_keyList;
169 QStringList m_parents;
170 bool m_valid;
171public:
172 QList<QSharedPointer<QIconCacheGtkReader>> m_gtkCaches;
173};
174
175class Q_GUI_EXPORT QIconLoader
176{
177public:
178 QIconLoader();
179 QThemeIconInfo loadIcon(const QString &iconName) const;
180 uint themeKey() const { return m_themeKey; }
181
182 QString themeName() const { return m_userTheme.isEmpty() ? m_systemTheme : m_userTheme; }
183 void setThemeName(const QString &themeName);
184 QString fallbackThemeName() const;
185 void setFallbackThemeName(const QString &themeName);
186 QIconTheme theme() { return themeList.value(themeName()); }
187 void setThemeSearchPath(const QStringList &searchPaths);
188 QStringList themeSearchPaths() const;
189 void setFallbackSearchPaths(const QStringList &searchPaths);
190 QStringList fallbackSearchPaths() const;
191 QIconDirInfo dirInfo(int dirindex);
192 static QIconLoader *instance();
193 void updateSystemTheme();
194 void invalidateKey() { m_themeKey++; }
195 void ensureInitialized();
196 bool hasUserTheme() const { return !m_userTheme.isEmpty(); }
197
198private:
199 QThemeIconInfo findIconHelper(const QString &themeName,
200 const QString &iconName,
201 QStringList &visited) const;
202 QThemeIconInfo lookupFallbackIcon(const QString &iconName) const;
203
204 uint m_themeKey;
205 bool m_supportsSvg;
206 bool m_initialized;
207
208 mutable QString m_userTheme;
209 mutable QString m_userFallbackTheme;
210 mutable QString m_systemTheme;
211 mutable QStringList m_iconDirs;
212 mutable QHash <QString, QIconTheme> themeList;
213 mutable QStringList m_fallbackDirs;
214};
215
216QT_END_NAMESPACE
217
218#endif // QT_NO_ICON
219
220#endif // QICONLOADER_P_H
221