From b6a824d0a3b4fabd9c22fe4c954d50e8755fb509 Mon Sep 17 00:00:00 2001
From: Dmitry Shachnev <mitya57@gmail.com>
Date: Fri, 15 Jan 2016 17:04:01 +0300
Subject: Add native support for D-Bus global menu

The protocol was originally developed by Canonical, currently supported
by Unity and Plasma.

Adjust some tests to use the non-native menu bar when they require it.

[ChangeLog][XCB / X11] QMenuBar uses the unified D-Bus AppMenu menubar
when the desktop environment supports it.

Change-Id: Iea74b40522573bcc4f70168fe7fa2a49b4f3fc21
Reviewed-by: Shawn Rutledge <shawn.rutledge@theqtcompany.com>
---
 .../themes/genericunix/qgenericunixthemes.cpp      | 68 +++++++++++++++++++++-
 .../themes/genericunix/qgenericunixthemes_p.h      | 12 ++++
 2 files changed, 79 insertions(+), 1 deletion(-)

(limited to 'src/platformsupport/themes')

diff --git a/src/platformsupport/themes/genericunix/qgenericunixthemes.cpp b/src/platformsupport/themes/genericunix/qgenericunixthemes.cpp
index 026ba11c3d..aee12eed76 100644
--- a/src/platformsupport/themes/genericunix/qgenericunixthemes.cpp
+++ b/src/platformsupport/themes/genericunix/qgenericunixthemes.cpp
@@ -59,9 +59,12 @@
 #include <qpa/qplatformintegration.h>
 #include <qpa/qplatformservices.h>
 #include <qpa/qplatformdialoghelper.h>
+#ifndef QT_NO_DBUS
+#include "QtPlatformSupport/private/qdbusplatformmenu_p.h"
+#include "QtPlatformSupport/private/qdbusmenubar_p.h"
+#endif
 #if !defined(QT_NO_DBUS) && !defined(QT_NO_SYSTEMTRAYICON)
 #include "QtPlatformSupport/private/qdbustrayicon_p.h"
-#include "QtPlatformSupport/private/qdbusplatformmenu_p.h"
 #endif
 
 #include <algorithm>
@@ -114,6 +117,21 @@ static bool isDBusTrayAvailable() {
 }
 #endif
 
+#ifndef QT_NO_DBUS
+static bool checkDBusGlobalMenuAvailable()
+{
+    QDBusConnection connection = QDBusConnection::sessionBus();
+    QString registrarService = QStringLiteral("com.canonical.AppMenu.Registrar");
+    return connection.interface()->isServiceRegistered(registrarService);
+}
+
+static bool isDBusGlobalMenuAvailable()
+{
+    static bool dbusGlobalMenuAvailable = checkDBusGlobalMenuAvailable();
+    return dbusGlobalMenuAvailable;
+}
+#endif
+
 class QGenericUnixThemePrivate : public QPlatformThemePrivate
 {
 public:
@@ -172,6 +190,22 @@ QStringList QGenericUnixTheme::xdgIconThemePaths()
     return paths;
 }
 
+#ifndef QT_NO_DBUS
+QPlatformMenu *QGenericUnixTheme::createPlatformMenu() const
+{
+    if (isDBusGlobalMenuAvailable())
+        return new QDBusPlatformMenu();
+    return nullptr;
+}
+
+QPlatformMenuBar *QGenericUnixTheme::createPlatformMenuBar() const
+{
+    if (isDBusGlobalMenuAvailable())
+        return new QDBusMenuBar();
+    return nullptr;
+}
+#endif
+
 #if !defined(QT_NO_DBUS) && !defined(QT_NO_SYSTEMTRAYICON)
 QPlatformSystemTrayIcon *QGenericUnixTheme::createPlatformSystemTrayIcon() const
 {
@@ -559,6 +593,22 @@ QPlatformTheme *QKdeTheme::createKdeTheme()
     return new QKdeTheme(kdeDirs, kdeVersion);
 }
 
+#ifndef QT_NO_DBUS
+QPlatformMenu *QKdeTheme::createPlatformMenu() const
+{
+    if (isDBusGlobalMenuAvailable())
+        return new QDBusPlatformMenu();
+    return nullptr;
+}
+
+QPlatformMenuBar *QKdeTheme::createPlatformMenuBar() const
+{
+    if (isDBusGlobalMenuAvailable())
+        return new QDBusMenuBar();
+    return nullptr;
+}
+#endif
+
 #if !defined(QT_NO_DBUS) && !defined(QT_NO_SYSTEMTRAYICON)
 QPlatformSystemTrayIcon *QKdeTheme::createPlatformSystemTrayIcon() const
 {
@@ -655,6 +705,22 @@ QString QGnomeTheme::gtkFontName() const
     return QStringLiteral("%1 %2").arg(QLatin1String(defaultSystemFontNameC)).arg(defaultSystemFontSize);
 }
 
+#ifndef QT_NO_DBUS
+QPlatformMenu *QGnomeTheme::createPlatformMenu() const
+{
+    if (isDBusGlobalMenuAvailable())
+        return new QDBusPlatformMenu();
+    return nullptr;
+}
+
+QPlatformMenuBar *QGnomeTheme::createPlatformMenuBar() const
+{
+    if (isDBusGlobalMenuAvailable())
+        return new QDBusMenuBar();
+    return nullptr;
+}
+#endif
+
 #if !defined(QT_NO_DBUS) && !defined(QT_NO_SYSTEMTRAYICON)
 QPlatformSystemTrayIcon *QGnomeTheme::createPlatformSystemTrayIcon() const
 {
diff --git a/src/platformsupport/themes/genericunix/qgenericunixthemes_p.h b/src/platformsupport/themes/genericunix/qgenericunixthemes_p.h
index 2d46a4d95e..b7e0d53d6f 100644
--- a/src/platformsupport/themes/genericunix/qgenericunixthemes_p.h
+++ b/src/platformsupport/themes/genericunix/qgenericunixthemes_p.h
@@ -85,6 +85,10 @@ public:
     QVariant themeHint(ThemeHint hint) const Q_DECL_OVERRIDE;
 
     static QStringList xdgIconThemePaths();
+#ifndef QT_NO_DBUS
+    QPlatformMenu *createPlatformMenu() const Q_DECL_OVERRIDE;
+    QPlatformMenuBar *createPlatformMenuBar() const Q_DECL_OVERRIDE;
+#endif
 #if !defined(QT_NO_DBUS) && !defined(QT_NO_SYSTEMTRAYICON)
     QPlatformSystemTrayIcon *createPlatformSystemTrayIcon() const Q_DECL_OVERRIDE;
 #endif
@@ -107,6 +111,10 @@ public:
     const QPalette *palette(Palette type = SystemPalette) const Q_DECL_OVERRIDE;
 
     const QFont *font(Font type) const Q_DECL_OVERRIDE;
+#ifndef QT_NO_DBUS
+    QPlatformMenu *createPlatformMenu() const Q_DECL_OVERRIDE;
+    QPlatformMenuBar *createPlatformMenuBar() const Q_DECL_OVERRIDE;
+#endif
 #if !defined(QT_NO_DBUS) && !defined(QT_NO_SYSTEMTRAYICON)
     QPlatformSystemTrayIcon *createPlatformSystemTrayIcon() const Q_DECL_OVERRIDE;
 #endif
@@ -127,6 +135,10 @@ public:
     QString standardButtonText(int button) const Q_DECL_OVERRIDE;
 
     virtual QString gtkFontName() const;
+#ifndef QT_NO_DBUS
+    QPlatformMenu *createPlatformMenu() const Q_DECL_OVERRIDE;
+    QPlatformMenuBar *createPlatformMenuBar() const Q_DECL_OVERRIDE;
+#endif
 #if !defined(QT_NO_DBUS) && !defined(QT_NO_SYSTEMTRAYICON)
     QPlatformSystemTrayIcon *createPlatformSystemTrayIcon() const Q_DECL_OVERRIDE;
 #endif
-- 
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