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
23static constexpr QLatin1StringView appearanceInterface("org.freedesktop.appearance");
24static constexpr QLatin1StringView colorSchemeKey("color-scheme");
25static constexpr QLatin1StringView contrastKey("contrast");
26
27class QXdgDesktopPortalThemePrivate : public QObject
28 {
29 Q_OBJECT
30public:
31 enum XdgColorschemePref {
32 None,
33 PreferDark,
34 PreferLight
35 };
36
37 QXdgDesktopPortalThemePrivate()
38 : QObject()
39 { }
40
41 ~QXdgDesktopPortalThemePrivate()
42 {
43 delete baseTheme;
44 }
45
46 /*! \internal
47
48 Converts the given Freedesktop color scheme setting \a colorschemePref to a Qt::ColorScheme value.
49 Specification: https://github.com/flatpak/xdg-desktop-portal/blob/d7a304a00697d7d608821253cd013f3b97ac0fb6/data/org.freedesktop.impl.portal.Settings.xml#L33-L45
50
51 Unfortunately the enum numerical values are not defined identically, so we have to convert them.
52
53 The mapping is as follows:
54
55 Enum Index: Freedesktop definition | Qt definition
56 ----------------------------------- | -------------
57 0: No preference | 0: Unknown
58 1: Prefer dark appearance | 2: Dark
59 2: Prefer light appearance | 1: Light
60 */
61 static Qt::ColorScheme colorSchemeFromXdgPref(const XdgColorschemePref colorschemePref)
62 {
63 switch (colorschemePref) {
64 case PreferDark: return Qt::ColorScheme::Dark;
65 case PreferLight: return Qt::ColorScheme::Light;
66 default: return Qt::ColorScheme::Unknown;
67 }
68 }
69
70public Q_SLOTS:
71 void settingChanged(const QString &group, const QString &key,
72 const QDBusVariant &value)
73 {
74 if (group == appearanceInterface) {
75 if (key == colorSchemeKey) {
76 colorScheme = colorSchemeFromXdgPref(colorschemePref: static_cast<XdgColorschemePref>(value.variant().toUInt()));
77 QWindowSystemInterface::handleThemeChange();
78 } else if (key == contrastKey) {
79 contrast = static_cast<Qt::ContrastPreference>(value.variant().toUInt());
80 QWindowSystemInterface::handleThemeChange();
81 }
82 }
83 }
84
85public:
86 QPlatformTheme *baseTheme = nullptr;
87 uint fileChooserPortalVersion = 0;
88 Qt::ColorScheme colorScheme = Qt::ColorScheme::Unknown;
89 Qt::ContrastPreference contrast = Qt::ContrastPreference::NoPreference;
90};
91
92QXdgDesktopPortalTheme::QXdgDesktopPortalTheme()
93 : d_ptr(new QXdgDesktopPortalThemePrivate)
94{
95 Q_D(QXdgDesktopPortalTheme);
96
97 const QStringList themeNames = QGuiApplicationPrivate::platform_integration->themeNames();
98 for (const QString &themeName : themeNames) {
99 if (QXdgDesktopPortalTheme::isXdgPlugin(key: themeName))
100 continue;
101 // 1) Look for a theme plugin.
102 d->baseTheme = QPlatformThemeFactory::create(key: themeName, platformPluginPath: nullptr);
103 if (d->baseTheme)
104 break;
105
106 // 2) If no theme plugin was found ask the platform integration to create a theme
107 d->baseTheme = QGuiApplicationPrivate::platform_integration->createPlatformTheme(name: themeName);
108 if (d->baseTheme)
109 break;
110 }
111
112 // 3) Fall back on the built-in "null" platform theme.
113 if (!d->baseTheme)
114 d->baseTheme = new QPlatformTheme;
115
116 // Get information about portal version
117 QDBusMessage message = QDBusMessage::createMethodCall(destination: "org.freedesktop.portal.Desktop"_L1,
118 path: "/org/freedesktop/portal/desktop"_L1,
119 interface: "org.freedesktop.DBus.Properties"_L1,
120 method: "Get"_L1);
121 message << "org.freedesktop.portal.FileChooser"_L1 << "version"_L1;
122 QDBusPendingCall pendingCall = QDBusConnection::sessionBus().asyncCall(message);
123 QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(pendingCall);
124 QObject::connect(sender: watcher, signal: &QDBusPendingCallWatcher::finished, context: watcher, slot: [d] (QDBusPendingCallWatcher *watcher) {
125 QDBusPendingReply<QVariant> reply = *watcher;
126 if (reply.isValid()) {
127 d->fileChooserPortalVersion = reply.value().toUInt();
128 }
129 watcher->deleteLater();
130 });
131
132 // Get information about system theme preference
133 message = QDBusMessage::createMethodCall(destination: "org.freedesktop.portal.Desktop"_L1,
134 path: "/org/freedesktop/portal/desktop"_L1,
135 interface: "org.freedesktop.portal.Settings"_L1,
136 method: "ReadAll"_L1);
137 message << appearanceInterface;
138
139 // this must not be asyncCall() because we have to set appearance now
140 QDBusReply<QVariant> reply = QDBusConnection::sessionBus().call(message);
141 if (reply.isValid()) {
142 const QMap<QString, QVariantMap> settingsMap = qvariant_cast<QMap<QString, QVariantMap>>(v: reply.value());
143 if (!settingsMap.isEmpty()) {
144 const auto xdgColorSchemePref = static_cast<QXdgDesktopPortalThemePrivate::XdgColorschemePref>(settingsMap.value(key: appearanceInterface).value(key: colorSchemeKey).toUInt());
145 d->colorScheme = QXdgDesktopPortalThemePrivate::colorSchemeFromXdgPref(colorschemePref: xdgColorSchemePref);
146 d->contrast = static_cast<Qt::ContrastPreference>(settingsMap.value(key: appearanceInterface).value(key: contrastKey).toUInt());
147 }
148 }
149
150 QDBusConnection::sessionBus().connect(
151 service: "org.freedesktop.portal.Desktop"_L1, path: "/org/freedesktop/portal/desktop"_L1,
152 interface: "org.freedesktop.portal.Settings"_L1, name: "SettingChanged"_L1, receiver: d_ptr.get(),
153 SLOT(settingChanged(QString,QString,QDBusVariant)));
154}
155
156QPlatformMenuItem* QXdgDesktopPortalTheme::createPlatformMenuItem() const
157{
158 Q_D(const QXdgDesktopPortalTheme);
159 return d->baseTheme->createPlatformMenuItem();
160}
161
162QPlatformMenu* QXdgDesktopPortalTheme::createPlatformMenu() const
163{
164 Q_D(const QXdgDesktopPortalTheme);
165 return d->baseTheme->createPlatformMenu();
166}
167
168QPlatformMenuBar* QXdgDesktopPortalTheme::createPlatformMenuBar() const
169{
170 Q_D(const QXdgDesktopPortalTheme);
171 return d->baseTheme->createPlatformMenuBar();
172}
173
174void QXdgDesktopPortalTheme::showPlatformMenuBar()
175{
176 Q_D(const QXdgDesktopPortalTheme);
177 return d->baseTheme->showPlatformMenuBar();
178}
179
180bool QXdgDesktopPortalTheme::usePlatformNativeDialog(DialogType type) const
181{
182 Q_D(const QXdgDesktopPortalTheme);
183
184 if (type == FileDialog)
185 return true;
186
187 return d->baseTheme->usePlatformNativeDialog(type);
188}
189
190QPlatformDialogHelper* QXdgDesktopPortalTheme::createPlatformDialogHelper(DialogType type) const
191{
192 Q_D(const QXdgDesktopPortalTheme);
193
194 if (type == FileDialog && d->fileChooserPortalVersion) {
195 // Older versions of FileChooser portal don't support opening directories, therefore we fallback
196 // to native file dialog opened inside the sandbox to open a directory.
197 if (d->baseTheme->usePlatformNativeDialog(type))
198 return new QXdgDesktopPortalFileDialog(static_cast<QPlatformFileDialogHelper*>(d->baseTheme->createPlatformDialogHelper(type)),
199 d->fileChooserPortalVersion);
200
201 return new QXdgDesktopPortalFileDialog;
202 }
203
204 return d->baseTheme->createPlatformDialogHelper(type);
205}
206
207#ifndef QT_NO_SYSTEMTRAYICON
208QPlatformSystemTrayIcon* QXdgDesktopPortalTheme::createPlatformSystemTrayIcon() const
209{
210 Q_D(const QXdgDesktopPortalTheme);
211 return d->baseTheme->createPlatformSystemTrayIcon();
212}
213#endif
214
215const QPalette *QXdgDesktopPortalTheme::palette(Palette type) const
216{
217 Q_D(const QXdgDesktopPortalTheme);
218 return d->baseTheme->palette(type);
219}
220
221const QFont* QXdgDesktopPortalTheme::font(Font type) const
222{
223 Q_D(const QXdgDesktopPortalTheme);
224 return d->baseTheme->font(type);
225}
226
227QVariant QXdgDesktopPortalTheme::themeHint(ThemeHint hint) const
228{
229 Q_D(const QXdgDesktopPortalTheme);
230 return d->baseTheme->themeHint(hint);
231}
232
233Qt::ColorScheme QXdgDesktopPortalTheme::colorScheme() const
234{
235 Q_D(const QXdgDesktopPortalTheme);
236 if (d->colorScheme == Qt::ColorScheme::Unknown)
237 return d->baseTheme->colorScheme();
238 return d->colorScheme;
239}
240
241Qt::ContrastPreference QXdgDesktopPortalTheme::contrastPreference() const
242{
243 Q_D(const QXdgDesktopPortalTheme);
244 return d->contrast;
245}
246
247QPixmap QXdgDesktopPortalTheme::standardPixmap(StandardPixmap sp, const QSizeF &size) const
248{
249 Q_D(const QXdgDesktopPortalTheme);
250 return d->baseTheme->standardPixmap(sp, size);
251}
252
253QIcon QXdgDesktopPortalTheme::fileIcon(const QFileInfo &fileInfo,
254 QPlatformTheme::IconOptions iconOptions) const
255{
256 Q_D(const QXdgDesktopPortalTheme);
257 return d->baseTheme->fileIcon(fileInfo, iconOptions);
258}
259
260QIconEngine * QXdgDesktopPortalTheme::createIconEngine(const QString &iconName) const
261{
262 Q_D(const QXdgDesktopPortalTheme);
263 return d->baseTheme->createIconEngine(iconName);
264}
265
266#if QT_CONFIG(shortcut)
267QList<QKeySequence> QXdgDesktopPortalTheme::keyBindings(QKeySequence::StandardKey key) const
268{
269 Q_D(const QXdgDesktopPortalTheme);
270 return d->baseTheme->keyBindings(key);
271}
272#endif
273
274QString QXdgDesktopPortalTheme::standardButtonText(int button) const
275{
276 Q_D(const QXdgDesktopPortalTheme);
277 return d->baseTheme->standardButtonText(button);
278}
279
280bool QXdgDesktopPortalTheme::isXdgPlugin(const QString &key)
281{
282 return key.compare(other: "xdgdesktopportal"_L1, cs: Qt::CaseInsensitive) == 0 ||
283 key.compare(other: "flatpak"_L1, cs: Qt::CaseInsensitive) == 0 ||
284 key.compare(other: "snap"_L1, cs: Qt::CaseInsensitive) == 0;
285}
286
287QT_END_NAMESPACE
288
289#include "qxdgdesktopportaltheme.moc"
290

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