cmake: avoid de-duplication of user's CXXFLAGS
[quassel.git] / src / qtui / qtui.cpp
index 9b1f6af..20f03ee 100644 (file)
@@ -1,5 +1,5 @@
 /***************************************************************************
- *   Copyright (C) 2005-2012 by the Quassel Project                        *
+ *   Copyright (C) 2005-2022 by the Quassel Project                        *
  *   devel@quassel-irc.org                                                 *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   You should have received a copy of the GNU General Public License     *
  *   along with this program; if not, write to the                         *
  *   Free Software Foundation, Inc.,                                       *
- *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
  ***************************************************************************/
 
 #include "qtui.h"
 
+#include <memory>
+
+#include <QApplication>
+#include <QFile>
+#include <QFileInfo>
+#include <QIcon>
+#include <QStringList>
+
 #include "abstractnotificationbackend.h"
 #include "buffermodel.h"
 #include "chatlinemodel.h"
 #include "contextmenuactionprovider.h"
+#include "icon.h"
 #include "mainwin.h"
 #include "qtuimessageprocessor.h"
 #include "qtuisettings.h"
 #include "types.h"
 #include "util.h"
 
-#ifdef Q_WS_X11
-#  include <QX11Info>
-#endif
-
-QtUi *QtUi::_instance = 0;
-MainWin *QtUi::_mainWin = 0;
-QList<AbstractNotificationBackend *> QtUi::_notificationBackends;
+QList<AbstractNotificationBackend*> QtUi::_notificationBackends;
 QList<AbstractNotificationBackend::Notification> QtUi::_notifications;
 
-QtUi::QtUi() : GraphicalUi()
+QtUi* QtUi::instance()
 {
-    if (_instance != 0) {
-        qWarning() << "QtUi has been instantiated again!";
-        return;
-    }
-    _instance = this;
+    return static_cast<QtUi*>(GraphicalUi::instance());
+}
 
+QtUi::QtUi()
+    : GraphicalUi()
+    , _systemIconTheme{QIcon::themeName()}
+{
     QtUiSettings uiSettings;
     Quassel::loadTranslation(uiSettings.value("Locale", QLocale::system()).value<QLocale>());
 
-    setContextMenuActionProvider(new ContextMenuActionProvider(this));
-    setToolBarActionProvider(new ToolBarActionProvider(this));
+    if (Quassel::isOptionSet("icontheme")) {
+        _systemIconTheme = Quassel::optionValue("icontheme");
+        QIcon::setThemeName(_systemIconTheme);
+    }
+    setupIconTheme();
+    QApplication::setWindowIcon(icon::get("quassel"));
 
     setUiStyle(new QtUiStyle(this));
-    _mainWin = new MainWin();
-
-    setMainWidget(_mainWin);
-
-    connect(_mainWin, SIGNAL(connectToCore(const QVariantMap &)), this, SIGNAL(connectToCore(const QVariantMap &)));
-    connect(_mainWin, SIGNAL(disconnectFromCore()), this, SIGNAL(disconnectFromCore()));
-    connect(Client::instance(), SIGNAL(bufferMarkedAsRead(BufferId)), SLOT(closeNotifications(BufferId)));
 }
 
-
 QtUi::~QtUi()
 {
     unregisterAllNotificationBackends();
-    delete _mainWin;
-    _mainWin = 0;
-    _instance = 0;
 }
 
-
 void QtUi::init()
 {
+    setContextMenuActionProvider(new ContextMenuActionProvider(this));
+    setToolBarActionProvider(new ToolBarActionProvider(this));
+
+    _mainWin = std::make_unique<MainWin>();
+    setMainWidget(_mainWin.get());
+
+    connect(_mainWin.get(), &MainWin::connectToCore, this, &QtUi::connectToCore);
+    connect(_mainWin.get(), &MainWin::disconnectFromCore, this, &QtUi::disconnectFromCore);
+    connect(Client::instance(), &Client::bufferMarkedAsRead, this, &QtUi::closeNotifications);
+
     _mainWin->init();
+
     QtUiSettings uiSettings;
-    uiSettings.initAndNotify("UseSystemTrayIcon", this, SLOT(useSystemTrayChanged(QVariant)), true);
+    uiSettings.initAndNotify("UseSystemTrayIcon", this, &QtUi::useSystemTrayChanged, true);
 
-    GraphicalUi::init(); // needs to be called after the mainWin is initialized
+    GraphicalUi::init();  // needs to be called after the mainWin is initialized
 }
 
-
-MessageModel *QtUi::createMessageModel(QObject *parent)
+MessageModel* QtUi::createMessageModel(QObject* parent)
 {
     return new ChatLineModel(parent);
 }
 
-
-AbstractMessageProcessor *QtUi::createMessageProcessor(QObject *parent)
+AbstractMessageProcessor* QtUi::createMessageProcessor(QObject* parent)
 {
     return new QtUiMessageProcessor(parent);
 }
 
-
 void QtUi::connectedToCore()
 {
     _mainWin->connectedToCore();
 }
 
-
 void QtUi::disconnectedFromCore()
 {
     _mainWin->disconnectedFromCore();
     GraphicalUi::disconnectedFromCore();
 }
 
-
-void QtUi::useSystemTrayChanged(const QVariant &v)
+void QtUi::useSystemTrayChanged(const QVariant& v)
 {
     _useSystemTray = v.toBool();
-    SystemTray *tray = mainWindow()->systemTray();
+    SystemTraytray = mainWindow()->systemTray();
     if (_useSystemTray) {
         if (tray->isSystemTrayAvailable())
             tray->setVisible(true);
@@ -125,22 +127,19 @@ void QtUi::useSystemTrayChanged(const QVariant &v)
     }
 }
 
-
 bool QtUi::haveSystemTray()
 {
     return mainWindow()->systemTray()->isSystemTrayAvailable() && instance()->_useSystemTray;
 }
 
-
 bool QtUi::isHidingMainWidgetAllowed() const
 {
     return haveSystemTray();
 }
 
-
 void QtUi::minimizeRestore(bool show)
 {
-    SystemTray *tray = mainWindow()->systemTray();
+    SystemTraytray = mainWindow()->systemTray();
     if (show) {
         if (tray && !_useSystemTray)
             tray->setVisible(false);
@@ -152,80 +151,73 @@ void QtUi::minimizeRestore(bool show)
     GraphicalUi::minimizeRestore(show);
 }
 
-
-void QtUi::registerNotificationBackend(AbstractNotificationBackend *backend)
+void QtUi::registerNotificationBackend(AbstractNotificationBackend* backend)
 {
     if (!_notificationBackends.contains(backend)) {
         _notificationBackends.append(backend);
-        instance()->connect(backend, SIGNAL(activated(uint)), SLOT(notificationActivated(uint)));
+        connect(backend, &AbstractNotificationBackend::activated, instance(), &QtUi::notificationActivated);
     }
 }
 
-
-void QtUi::unregisterNotificationBackend(AbstractNotificationBackend *backend)
+void QtUi::unregisterNotificationBackend(AbstractNotificationBackend* backend)
 {
     _notificationBackends.removeAll(backend);
 }
 
-
 void QtUi::unregisterAllNotificationBackends()
 {
     _notificationBackends.clear();
 }
 
-
-const QList<AbstractNotificationBackend *> &QtUi::notificationBackends()
+const QList<AbstractNotificationBackend*>& QtUi::notificationBackends()
 {
     return _notificationBackends;
 }
 
-
-uint QtUi::invokeNotification(BufferId bufId, AbstractNotificationBackend::NotificationType type, const QString &sender, const QString &text)
+uint QtUi::invokeNotification(BufferId bufId, AbstractNotificationBackend::NotificationType type, const QString& sender, const QString& text)
 {
     static int notificationId = 0;
 
     AbstractNotificationBackend::Notification notification(++notificationId, bufId, type, sender, text);
     _notifications.append(notification);
-    foreach(AbstractNotificationBackend *backend, _notificationBackends)
-    backend->notify(notification);
+    foreach (AbstractNotificationBackend* backend, _notificationBackends)
+        backend->notify(notification);
     return notificationId;
 }
 
-
 void QtUi::closeNotification(uint notificationId)
 {
     QList<AbstractNotificationBackend::Notification>::iterator i = _notifications.begin();
     while (i != _notifications.end()) {
         if (i->notificationId == notificationId) {
-            foreach(AbstractNotificationBackend *backend, _notificationBackends)
-            backend->close(notificationId);
+            foreach (AbstractNotificationBackend* backend, _notificationBackends)
+                backend->close(notificationId);
             i = _notifications.erase(i);
         }
-        else ++i;
+        else
+            ++i;
     }
 }
 
-
 void QtUi::closeNotifications(BufferId bufferId)
 {
     QList<AbstractNotificationBackend::Notification>::iterator i = _notifications.begin();
     while (i != _notifications.end()) {
         if (!bufferId.isValid() || i->bufferId == bufferId) {
-            foreach(AbstractNotificationBackend *backend, _notificationBackends)
-            backend->close(i->notificationId);
+            foreach (AbstractNotificationBackend* backend, _notificationBackends)
+                backend->close(i->notificationId);
             i = _notifications.erase(i);
         }
-        else ++i;
+        else
+            ++i;
     }
 }
 
-
-const QList<AbstractNotificationBackend::Notification> &QtUi::activeNotifications()
+const QList<AbstractNotificationBackend::Notification>& QtUi::activeNotifications()
 {
     return _notifications;
 }
 
-
 void QtUi::notificationActivated(uint notificationId)
 {
     if (notificationId != 0) {
@@ -245,10 +237,140 @@ void QtUi::notificationActivated(uint notificationId)
     activateMainWidget();
 }
 
-
 void QtUi::bufferMarkedAsRead(BufferId bufferId)
 {
     if (bufferId.isValid()) {
         closeNotifications(bufferId);
     }
 }
+
+std::vector<std::pair<QString, QString>> QtUi::availableIconThemes() const
+{
+    //: Supported icon theme names
+    static const std::vector<std::pair<QString, QString>> supported{{"breeze", tr("Breeze")},
+                                                                    {"breeze-dark", tr("Breeze Dark")},
+#ifdef WITH_OXYGEN_ICONS
+                                                                    {"oxygen", tr("Oxygen")}
+#endif
+    };
+
+    std::vector<std::pair<QString, QString>> result;
+    for (auto&& themePair : supported) {
+        for (auto&& dir : QIcon::themeSearchPaths()) {
+            if (QFileInfo{dir + "/" + themePair.first + "/index.theme"}.exists()) {
+                result.push_back(themePair);
+                break;
+            }
+        }
+    }
+
+    return result;
+}
+
+QString QtUi::systemIconTheme() const
+{
+    return _systemIconTheme;
+}
+
+void QtUi::setupIconTheme()
+{
+    // Add paths to our own icon sets to the theme search paths
+    QStringList themePaths = QIcon::themeSearchPaths();
+    themePaths.removeAll(":/icons");  // this should come last
+    for (auto&& dataDir : Quassel::dataDirPaths()) {
+        QString iconDir{dataDir + "icons"};
+        if (QFileInfo{iconDir}.isDir()) {
+            themePaths << iconDir;
+        }
+    }
+    themePaths << ":/icons";
+    QIcon::setThemeSearchPaths(themePaths);
+
+    refreshIconTheme();
+}
+
+void QtUi::refreshIconTheme()
+{
+    // List of available fallback themes
+    QStringList availableThemes;
+    for (auto&& themePair : availableIconThemes()) {
+        availableThemes << themePair.first;
+    }
+
+    if (availableThemes.isEmpty()) {
+        // We could probably introduce a more sophisticated fallback handling, such as putting the "most important" icons into hicolor,
+        // but this just gets complex for no good reason. We really rely on a supported theme to be installed, if not system-wide, then
+        // as part of the Quassel installation (which is enabled by default anyway).
+        qWarning() << tr(
+            "No supported icon theme installed, you'll lack icons! Supported are the KDE/Plasma themes Breeze, Breeze Dark and Oxygen.");
+        return;
+    }
+
+    UiStyleSettings s;
+    QString fallbackTheme{s.value("Icons/FallbackTheme").toString()};
+
+    if (fallbackTheme.isEmpty() || !availableThemes.contains(fallbackTheme)) {
+        if (availableThemes.contains(_systemIconTheme)) {
+            fallbackTheme = _systemIconTheme;
+        }
+        else {
+            fallbackTheme = availableThemes.first();
+        }
+    }
+
+    if (_systemIconTheme.isEmpty() || _systemIconTheme == fallbackTheme || s.value("Icons/OverrideSystemTheme", true).toBool()) {
+        // We have a valid fallback theme and want to override the system theme (if it's even defined), so we're basically done
+        QIcon::setThemeName(fallbackTheme);
+        emit iconThemeRefreshed();
+        return;
+    }
+
+    // At this point, we have a system theme that we don't want to override, but that may not contain all
+    // required icons.
+    // We create a dummy theme that inherits first from the system theme, then from the supported fallback.
+    // This rather ugly hack allows us to inject the fallback into the inheritance chain, so non-standard
+    // icons missing in the system theme will be filled in by the fallback.
+    // Since we can't get notified when the system theme changes, this means that a restart may be required
+    // to apply a theme change... but you can't have everything, I guess.
+    if (!_dummyThemeDir) {
+        _dummyThemeDir = std::make_unique<QTemporaryDir>();
+        if (!_dummyThemeDir->isValid() || !QDir{_dummyThemeDir->path()}.mkpath("icons/quassel-icon-proxy/apps/32")) {
+            qWarning() << "Could not create temporary directory for proxying the system icon theme, using fallback";
+            QIcon::setThemeName(fallbackTheme);
+            emit iconThemeRefreshed();
+            return;
+        }
+        // Add this to XDG_DATA_DIRS, otherwise KIconLoader complains
+        auto xdgDataDirs = qgetenv("XDG_DATA_DIRS");
+        if (!xdgDataDirs.isEmpty())
+            xdgDataDirs += ":";
+        xdgDataDirs += _dummyThemeDir->path();
+        qputenv("XDG_DATA_DIRS", xdgDataDirs);
+
+        QIcon::setThemeSearchPaths(QIcon::themeSearchPaths() << _dummyThemeDir->path() + "/icons");
+    }
+
+    QFile indexFile{_dummyThemeDir->path() + "/icons/quassel-icon-proxy/index.theme"};
+    if (!indexFile.open(QFile::WriteOnly | QFile::Truncate)) {
+        qWarning() << "Could not create index file for proxying the system icon theme, using fallback";
+        QIcon::setThemeName(fallbackTheme);
+        emit iconThemeRefreshed();
+        return;
+    }
+
+    // Write a dummy index file that is sufficient to make QIconLoader happy
+    auto indexContents = QString{"[Icon Theme]\n"
+                                 "Name=quassel-icon-proxy\n"
+                                 "Inherits=%1,%2\n"
+                                 "Directories=apps/32\n"
+                                 "[apps/32]\nSize=32\nType=Fixed\n"}
+                             .arg(_systemIconTheme, fallbackTheme);
+    if (indexFile.write(indexContents.toLatin1()) < 0) {
+        qWarning() << "Could not write index file for proxying the system icon theme, using fallback";
+        QIcon::setThemeName(fallbackTheme);
+        emit iconThemeRefreshed();
+        return;
+    }
+    indexFile.close();
+    QIcon::setThemeName("quassel-icon-proxy");
+}