Add convenient method getTimestamp to QX11Info

Provides access to the getTimestamp method in the XCB plugin which
allows users to retrieve the current X timestamp.

Change-Id: Ib6acd44c8ff899265ed6826f36b88fe427ff58c3
Reviewed-by: David Faure (KDE) <faure@kde.org>

2 files changed, 21 insertions, 0 deletions

diff --git a/src/x11extras/qx11info_x11.cpp b/src/x11extras/qx11info_x11.cpp
index aa35ff1..713e76c 100644
--- a/src/x11extras/qx11info_x11.cpp
+++ b/src/x11extras/qx11info_x11.cpp
@@ -253,6 +253,25 @@ void QX11Info::setAppUserTime(unsigned long time)
 }
 
 /*!
+    Fetches the current X11 time stamp from the X Server.
+
+    This method creates a property notify event and blocks till it is
+    received back from the X Server.
+
+    \since 5.2
+*/
+unsigned long QX11Info::getTimestamp()
+{
+    if (!qApp)
+        return 0;
+    QPlatformNativeInterface *native = qApp->platformNativeInterface();
+    if (!native)
+        return 0;
+    QScreen* screen = QGuiApplication::primaryScreen();
+    return static_cast<xcb_timestamp_t>(reinterpret_cast<quintptr>(native->nativeResourceForScreen("gettimestamp", screen)));
+}
+
+/*!
     Returns the default display for the application.
 
     \sa appScreen()
diff --git a/src/x11extras/qx11info_x11.h b/src/x11extras/qx11info_x11.h
index afc9ee4..bbc7ff4 100644
--- a/src/x11extras/qx11info_x11.h
+++ b/src/x11extras/qx11info_x11.h
@@ -65,6 +65,8 @@ public:
     static void setAppTime(unsigned long time);
     static void setAppUserTime(unsigned long time);
 
+    static unsigned long getTimestamp();
+
     static Display *display();
     static xcb_connection_t *connection();