1 files changed, 181 insertions, 0 deletions
diff --git a/vcl/unx/generic/app/randrwrapper.cxx b/vcl/unx/generic/app/randrwrapper.cxx
new file mode 100644
index 000000000..cb3698365
--- /dev/null
+++ b/vcl/unx/generic/app/randrwrapper.cxx
@@ -0,0 +1,181 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifdef USE_RANDR
+
+#include <X11/Xlib.h>
+#include <X11/extensions/Xrandr.h>
+
+#include <sal/log.hxx>
+
+namespace
+{
+
+class RandRWrapper
+{
+    bool m_bValid;
+
+    explicit RandRWrapper(Display*);
+public:
+    static RandRWrapper& get(Display*);
+    static void releaseWrapper();
+
+    Bool XRRQueryExtension(Display* i_pDisp, int* o_event_base, int* o_error_base )
+    {
+        Bool bRet = False;
+        if( m_bValid )
+            bRet = ::XRRQueryExtension( i_pDisp, o_event_base, o_error_base );
+        return bRet;
+    }
+    XRRScreenConfiguration* XRRGetScreenInfo( Display* i_pDisp, Drawable i_aDrawable )
+    {
+        return m_bValid ? ::XRRGetScreenInfo( i_pDisp, i_aDrawable ) : nullptr;
+    }
+    void XRRFreeScreenConfigInfo( XRRScreenConfiguration* i_pConfig )
+    {
+        if( m_bValid )
+            ::XRRFreeScreenConfigInfo( i_pConfig );
+    }
+    void XRRSelectInput( Display* i_pDisp, ::Window i_window, int i_nMask )
+    {
+        if( m_bValid )
+            ::XRRSelectInput( i_pDisp, i_window, i_nMask );
+    }
+    int XRRUpdateConfiguration( XEvent* i_pEvent )
+    {
+        return m_bValid ? ::XRRUpdateConfiguration( i_pEvent ) : 0;
+    }
+    XRRScreenSize* XRRConfigSizes( XRRScreenConfiguration* i_pConfig, int* o_nSizes )
+    {
+        return m_bValid ? ::XRRConfigSizes( i_pConfig, o_nSizes ) : nullptr;
+    }
+    SizeID XRRConfigCurrentConfiguration( XRRScreenConfiguration* i_pConfig, Rotation* o_pRot )
+    {
+        return m_bValid ? ::XRRConfigCurrentConfiguration( i_pConfig, o_pRot ) : 0;
+    }
+    int XRRRootToScreen( Display *dpy, ::Window root )
+    {
+        return m_bValid ? ::XRRRootToScreen( dpy, root ) : -1;
+    }
+};
+
+RandRWrapper::RandRWrapper( Display* pDisplay ) :
+    m_bValid( true )
+{
+    int nEventBase = 0, nErrorBase = 0;
+    if( !XRRQueryExtension( pDisplay, &nEventBase, &nErrorBase ) )
+        m_bValid = false;
+}
+
+static RandRWrapper* pWrapper = nullptr;
+
+RandRWrapper& RandRWrapper::get( Display* i_pDisplay )
+{
+    if( ! pWrapper )
+        pWrapper = new RandRWrapper( i_pDisplay );
+    return *pWrapper;
+}
+
+void RandRWrapper::releaseWrapper()
+{
+    delete pWrapper;
+    pWrapper = nullptr;
+}
+
+} // namespace
+
+#endif
+
+#include <unx/saldisp.hxx>
+#if OSL_DEBUG_LEVEL > 1
+#include <cstdio>
+#endif
+
+void SalDisplay::InitRandR( ::Window aRoot ) const
+{
+    #ifdef USE_RANDR
+    RandRWrapper::get( GetDisplay() ).XRRSelectInput( GetDisplay(), aRoot, RRScreenChangeNotifyMask );
+    #else
+    (void)this;
+    (void)aRoot;
+    #endif
+}
+
+void SalDisplay::DeInitRandR()
+{
+    #ifdef USE_RANDR
+    RandRWrapper::releaseWrapper();
+#if OSL_DEBUG_LEVEL > 1
+    SAL_INFO("vcl.app", "SalDisplay::DeInitRandR().");
+#endif
+    #endif
+}
+
+void SalDisplay::processRandREvent( XEvent* pEvent )
+{
+#ifdef USE_RANDR
+    XConfigureEvent* pCnfEvent=reinterpret_cast<XConfigureEvent*>(pEvent);
+    if( pWrapper && pWrapper->XRRRootToScreen(GetDisplay(),pCnfEvent->window) != -1 )
+    {
+        int nRet = pWrapper->XRRUpdateConfiguration( pEvent );
+        if( nRet == 1 && pEvent->type != ConfigureNotify) // this should then be a XRRScreenChangeNotifyEvent
+        {
+            // update screens
+            bool bNotify = false;
+            for(ScreenData & rScreen : m_aScreens)
+            {
+                if( rScreen.m_bInit )
+                {
+                    XRRScreenConfiguration *pConfig = nullptr;
+                    XRRScreenSize *pSizes = nullptr;
+                    int nSizes = 0;
+                    Rotation nRot = 0;
+                    SizeID nId = 0;
+
+                    pConfig = pWrapper->XRRGetScreenInfo( GetDisplay(), rScreen.m_aRoot );
+                    nId = pWrapper->XRRConfigCurrentConfiguration( pConfig, &nRot );
+                    pSizes = pWrapper->XRRConfigSizes( pConfig, &nSizes );
+                    XRRScreenSize *pTargetSize = pSizes + nId;
+
+                    bNotify = bNotify ||
+                              rScreen.m_aSize.Width() != pTargetSize->width ||
+                              rScreen.m_aSize.Height() != pTargetSize->height;
+
+                    rScreen.m_aSize = Size( pTargetSize->width, pTargetSize->height );
+
+                    pWrapper->XRRFreeScreenConfigInfo( pConfig );
+
+#if OSL_DEBUG_LEVEL > 1
+                    SAL_INFO("vcl.app", "screen " << nId
+                            << " changed to size " << (int)pTargetSize->width
+                            << "x" << (int)pTargetSize->height);
+#endif
+                }
+            }
+            if( bNotify )
+                emitDisplayChanged();
+        }
+    }
+#else
+    (void)this;
+    (void)pEvent;
+#endif
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */