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-rw-r--r--vcl/unx/generic/app/randrwrapper.cxx181
1 files changed, 181 insertions, 0 deletions
diff --git a/vcl/unx/generic/app/randrwrapper.cxx b/vcl/unx/generic/app/randrwrapper.cxx
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+++ b/vcl/unx/generic/app/randrwrapper.cxx
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+/* -*- 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;
+}
+
+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 )
+ return;
+
+ int nRet = pWrapper->XRRUpdateConfiguration( pEvent );
+ if( nRet != 1 || pEvent->type == ConfigureNotify) // this should then be a XRRScreenChangeNotifyEvent
+ return;
+
+ // 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: */