1// Copyright (C) 2017 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#include "qxdgdesktopportaltheme.h"
5#include "qxdgdesktopportalfiledialog_p.h"
6
7#include <private/qguiapplication_p.h>
8#include <qpa/qplatformtheme_p.h>
9#include <qpa/qplatformthemefactory_p.h>
10#include <qpa/qplatformintegration.h>
11
12#include <QDBusConnection>
13#include <QDBusMessage>
14#include <QDBusPendingCall>
15#include <QDBusPendingCallWatcher>
16#include <QDBusPendingReply>
17#include <QDBusReply>
18
19QT_BEGIN_NAMESPACE
20
21using namespace Qt::StringLiterals;
22
23class QXdgDesktopPortalThemePrivate : public QObject
24 {
25 Q_OBJECT
26public:
27 enum XdgColorschemePref {
28 None,
29 PreferDark,
30 PreferLight
31 };
32
33 QXdgDesktopPortalThemePrivate()
34 : QObject()
35 { }
36
37 ~QXdgDesktopPortalThemePrivate()
38 {
39 delete baseTheme;
40 }
41
42 /*! \internal
43
44 Converts the given Freedesktop color scheme setting \a colorschemePref to a Qt::ColorScheme value.
45 Specification: https://github.com/flatpak/xdg-desktop-portal/blob/d7a304a00697d7d608821253cd013f3b97ac0fb6/data/org.freedesktop.impl.portal.Settings.xml#L33-L45
46
47 Unfortunately the enum numerical values are not defined identically, so we have to convert them.
48
49 The mapping is as follows:
50
51 Enum Index: Freedesktop definition | Qt definition
52 ----------------------------------- | -------------
53 0: No preference | 0: Unknown
54 1: Prefer dark appearance | 2: Dark
55 2: Prefer light appearance | 1: Light
56 */
57 static Qt::ColorScheme colorSchemeFromXdgPref(const XdgColorschemePref colorschemePref)
58 {
59 switch (colorschemePref) {
60 case PreferDark: return Qt::ColorScheme::Dark;
61 case PreferLight: return Qt::ColorScheme::Light;
62 default: return Qt::ColorScheme::Unknown;
63 }
64 }
65
66public Q_SLOTS:
67 void settingChanged(const QString &group, const QString &key,
68 const QDBusVariant &value)
69 {
70 if (group == "org.freedesktop.appearance"_L1 && key == "color-scheme"_L1) {
71 colorScheme = colorSchemeFromXdgPref(colorschemePref: static_cast<XdgColorschemePref>(value.variant().toUInt()));
72 QWindowSystemInterface::handleThemeChange();
73 }
74 }
75
76public:
77 QPlatformTheme *baseTheme = nullptr;
78 uint fileChooserPortalVersion = 0;
79 Qt::ColorScheme colorScheme = Qt::ColorScheme::Unknown;
80};
81
82QXdgDesktopPortalTheme::QXdgDesktopPortalTheme()
83 : d_ptr(new QXdgDesktopPortalThemePrivate)
84{
85 Q_D(QXdgDesktopPortalTheme);
86
87 QStringList themeNames;
88 themeNames += QGuiApplicationPrivate::platform_integration->themeNames();
89 // 1) Look for a theme plugin.
90 for (const QString &themeName : std::as_const(t&: themeNames)) {
91 d->baseTheme = QPlatformThemeFactory::create(key: themeName, platformPluginPath: nullptr);
92 if (d->baseTheme)
93 break;
94 }
95
96 // 2) If no theme plugin was found ask the platform integration to
97 // create a theme
98 if (!d->baseTheme) {
99 for (const QString &themeName : std::as_const(t&: themeNames)) {
100 d->baseTheme = QGuiApplicationPrivate::platform_integration->createPlatformTheme(name: themeName);
101 if (d->baseTheme)
102 break;
103 }
104 // No error message; not having a theme plugin is allowed.
105 }
106
107 // 3) Fall back on the built-in "null" platform theme.
108 if (!d->baseTheme)
109 d->baseTheme = new QPlatformTheme;
110
111 // Get information about portal version
112 QDBusMessage message = QDBusMessage::createMethodCall(destination: "org.freedesktop.portal.Desktop"_L1,
113 path: "/org/freedesktop/portal/desktop"_L1,
114 interface: "org.freedesktop.DBus.Properties"_L1,
115 method: "Get"_L1);
116 message << "org.freedesktop.portal.FileChooser"_L1 << "version"_L1;
117 QDBusPendingCall pendingCall = QDBusConnection::sessionBus().asyncCall(message);
118 QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(pendingCall);
119 QObject::connect(sender: watcher, signal: &QDBusPendingCallWatcher::finished, context: watcher, slot: [d] (QDBusPendingCallWatcher *watcher) {
120 QDBusPendingReply<QVariant> reply = *watcher;
121 if (reply.isValid()) {
122 d->fileChooserPortalVersion = reply.value().toUInt();
123 }
124 watcher->deleteLater();
125 });
126
127 // Get information about system theme preference
128 message = QDBusMessage::createMethodCall(destination: "org.freedesktop.portal.Desktop"_L1,
129 path: "/org/freedesktop/portal/desktop"_L1,
130 interface: "org.freedesktop.portal.Settings"_L1,
131 method: "Read"_L1);
132 message << "org.freedesktop.appearance"_L1 << "color-scheme"_L1;
133
134 // this must not be asyncCall() because we have to set appearance now
135 QDBusReply<QVariant> reply = QDBusConnection::sessionBus().call(message);
136 if (reply.isValid()) {
137 const QDBusVariant dbusVariant = qvariant_cast<QDBusVariant>(v: reply.value());
138 const QXdgDesktopPortalThemePrivate::XdgColorschemePref xdgPref = static_cast<QXdgDesktopPortalThemePrivate::XdgColorschemePref>(dbusVariant.variant().toUInt());
139 d->colorScheme = QXdgDesktopPortalThemePrivate::colorSchemeFromXdgPref(colorschemePref: xdgPref);
140 }
141
142 QDBusConnection::sessionBus().connect(
143 service: "org.freedesktop.portal.Desktop"_L1, path: "/org/freedesktop/portal/desktop"_L1,
144 interface: "org.freedesktop.portal.Settings"_L1, name: "SettingChanged"_L1, receiver: d_ptr.get(),
145 SLOT(settingChanged(QString, QString, QDBusVariant)));
146}
147
148QPlatformMenuItem* QXdgDesktopPortalTheme::createPlatformMenuItem() const
149{
150 Q_D(const QXdgDesktopPortalTheme);
151 return d->baseTheme->createPlatformMenuItem();
152}
153
154QPlatformMenu* QXdgDesktopPortalTheme::createPlatformMenu() const
155{
156 Q_D(const QXdgDesktopPortalTheme);
157 return d->baseTheme->createPlatformMenu();
158}
159
160QPlatformMenuBar* QXdgDesktopPortalTheme::createPlatformMenuBar() const
161{
162 Q_D(const QXdgDesktopPortalTheme);
163 return d->baseTheme->createPlatformMenuBar();
164}
165
166void QXdgDesktopPortalTheme::showPlatformMenuBar()
167{
168 Q_D(const QXdgDesktopPortalTheme);
169 return d->baseTheme->showPlatformMenuBar();
170}
171
172bool QXdgDesktopPortalTheme::usePlatformNativeDialog(DialogType type) const
173{
174 Q_D(const QXdgDesktopPortalTheme);
175
176 if (type == FileDialog)
177 return true;
178
179 return d->baseTheme->usePlatformNativeDialog(type);
180}
181
182QPlatformDialogHelper* QXdgDesktopPortalTheme::createPlatformDialogHelper(DialogType type) const
183{
184 Q_D(const QXdgDesktopPortalTheme);
185
186 if (type == FileDialog && d->fileChooserPortalVersion) {
187 // Older versions of FileChooser portal don't support opening directories, therefore we fallback
188 // to native file dialog opened inside the sandbox to open a directory.
189 if (d->baseTheme->usePlatformNativeDialog(type))
190 return new QXdgDesktopPortalFileDialog(static_cast<QPlatformFileDialogHelper*>(d->baseTheme->createPlatformDialogHelper(type)),
191 d->fileChooserPortalVersion);
192
193 return new QXdgDesktopPortalFileDialog;
194 }
195
196 return d->baseTheme->createPlatformDialogHelper(type);
197}
198
199#ifndef QT_NO_SYSTEMTRAYICON
200QPlatformSystemTrayIcon* QXdgDesktopPortalTheme::createPlatformSystemTrayIcon() const
201{
202 Q_D(const QXdgDesktopPortalTheme);
203 return d->baseTheme->createPlatformSystemTrayIcon();
204}
205#endif
206
207const QPalette *QXdgDesktopPortalTheme::palette(Palette type) const
208{
209 Q_D(const QXdgDesktopPortalTheme);
210 return d->baseTheme->palette(type);
211}
212
213const QFont* QXdgDesktopPortalTheme::font(Font type) const
214{
215 Q_D(const QXdgDesktopPortalTheme);
216 return d->baseTheme->font(type);
217}
218
219QVariant QXdgDesktopPortalTheme::themeHint(ThemeHint hint) const
220{
221 Q_D(const QXdgDesktopPortalTheme);
222 return d->baseTheme->themeHint(hint);
223}
224
225Qt::ColorScheme QXdgDesktopPortalTheme::colorScheme() const
226{
227 Q_D(const QXdgDesktopPortalTheme);
228 if (d->colorScheme == Qt::ColorScheme::Unknown)
229 return d->baseTheme->colorScheme();
230 return d->colorScheme;
231}
232
233QPixmap QXdgDesktopPortalTheme::standardPixmap(StandardPixmap sp, const QSizeF &size) const
234{
235 Q_D(const QXdgDesktopPortalTheme);
236 return d->baseTheme->standardPixmap(sp, size);
237}
238
239QIcon QXdgDesktopPortalTheme::fileIcon(const QFileInfo &fileInfo,
240 QPlatformTheme::IconOptions iconOptions) const
241{
242 Q_D(const QXdgDesktopPortalTheme);
243 return d->baseTheme->fileIcon(fileInfo, iconOptions);
244}
245
246QIconEngine * QXdgDesktopPortalTheme::createIconEngine(const QString &iconName) const
247{
248 Q_D(const QXdgDesktopPortalTheme);
249 return d->baseTheme->createIconEngine(iconName);
250}
251
252#if QT_CONFIG(shortcut)
253QList<QKeySequence> QXdgDesktopPortalTheme::keyBindings(QKeySequence::StandardKey key) const
254{
255 Q_D(const QXdgDesktopPortalTheme);
256 return d->baseTheme->keyBindings(key);
257}
258#endif
259
260QString QXdgDesktopPortalTheme::standardButtonText(int button) const
261{
262 Q_D(const QXdgDesktopPortalTheme);
263 return d->baseTheme->standardButtonText(button);
264}
265
266QT_END_NAMESPACE
267
268#include "qxdgdesktopportaltheme.moc"
269

source code of qtbase/src/plugins/platformthemes/xdgdesktopportal/qxdgdesktopportaltheme.cpp