Moving logic from Qt4 for grabbing the X server

Basically you don't want to grab the X server while your debugging.
Also added an environment variable which lets you force to not grab
the X server

Change-Id: Iba03f11c8f486ce71c55fac7716bffcb7cc8cb98
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>

1 files changed, 14 insertions, 1 deletions

diff --git a/src/plugins/platforms/xcb/qxcbconnection.cpp b/src/plugins/platforms/xcb/qxcbconnection.cpp
index de3d487c4b..0597b18679 100644
--- a/src/plugins/platforms/xcb/qxcbconnection.cpp
+++ b/src/plugins/platforms/xcb/qxcbconnection.cpp
@@ -242,8 +242,9 @@ void QXcbConnection::updateScreens()
             ((QXcbIntegration*)QGuiApplicationPrivate::platformIntegration())->screenAdded(screen);
 }
 
-QXcbConnection::QXcbConnection(QXcbNativeInterface *nativeInterface, const char *displayName)
+QXcbConnection::QXcbConnection(QXcbNativeInterface *nativeInterface, bool canGrabServer, const char *displayName)
     : m_connection(0)
+    , m_canGrabServer(canGrabServer)
     , m_primaryScreen(0)
     , m_displayName(displayName ? QByteArray(displayName) : qgetenv("DISPLAY"))
     , m_nativeInterface(nativeInterface)
@@ -952,6 +953,18 @@ void QXcbConnection::setFocusWindow(QXcbWindow *w)
     m_focusWindow = w;
 }
 
+void QXcbConnection::grabServer()
+{
+    if (m_canGrabServer)
+        xcb_grab_server(m_connection);
+}
+
+void QXcbConnection::ungrabServer()
+{
+    if (m_canGrabServer)
+        xcb_ungrab_server(m_connection);
+}
+
 void QXcbConnection::sendConnectionEvent(QXcbAtom::Atom a, uint id)
 {
     xcb_client_message_event_t event;