split gtkdata into gtk3 and gtk3 versions

Change-Id: Ic102a5a1193a8bc50b460e5897b1ca488f0d4a65

1 files changed, 843 insertions, 1 deletions

diff --git a/vcl/unx/gtk3/gtk3gtkdata.cxx b/vcl/unx/gtk3/gtk3gtkdata.cxx
index df53f349598a..75a476e4f9ef 100644
--- a/vcl/unx/gtk3/gtk3gtkdata.cxx
+++ b/vcl/unx/gtk3/gtk3gtkdata.cxx
@@ -5,8 +5,850 @@
  * 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 .
  */
 
-#include "../gtk/gtkdata.cxx"
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <errno.h>
+#include <poll.h>
+#if defined(FREEBSD) || defined(NETBSD)
+#include <sys/types.h>
+#include <sys/time.h>
+#endif
+#include <unx/gtk/gtkdata.hxx>
+#include <unx/gtk/gtkinst.hxx>
+#include <unx/gtk/gtkframe.hxx>
+#include <unx/gtk/gtksalmenu.hxx>
+#include <unx/salobj.h>
+#include <unx/geninst.h>
+#include <osl/thread.h>
+#include <osl/process.h>
+
+#include "unx/i18n_im.hxx"
+#include "unx/i18n_xkb.hxx"
+#include <unx/wmadaptor.hxx>
+
+#include "unx/x11_cursors/salcursors.h"
+
+#include <vcl/svapp.hxx>
+
+#ifdef GDK_WINDOWING_X11
+#  include <gdk/gdkx.h>
+#endif
+
+using namespace vcl_sal;
+
+/***************************************************************
+ * class GtkSalDisplay                                         *
+ ***************************************************************/
+extern "C" {
+GdkFilterReturn call_filterGdkEvent( GdkXEvent* sys_event,
+                                     GdkEvent* event,
+                                     gpointer data )
+{
+    GtkSalDisplay *pDisplay = static_cast<GtkSalDisplay *>(data);
+    return pDisplay->filterGdkEvent( sys_event, event );
+}
+}
+
+GtkSalDisplay::GtkSalDisplay( GdkDisplay* pDisplay ) :
+            m_pSys( GtkSalSystem::GetSingleton() ),
+            m_pGdkDisplay( pDisplay ),
+            m_bStartupCompleted( false )
+{
+    for(GdkCursor* & rpCsr : m_aCursors)
+        rpCsr = nullptr;
+
+    // FIXME: unify this with SalInst's filter too ?
+    gdk_window_add_filter( nullptr, call_filterGdkEvent, this );
+
+    if ( getenv( "SAL_IGNOREXERRORS" ) )
+        GetGenericData()->ErrorTrapPush(); // and leak the trap
+
+    m_bX11Display = GDK_IS_X11_DISPLAY( m_pGdkDisplay );
+
+#ifdef GDK_WINDOWING_X11
+    if (m_bX11Display)
+    {
+        if (!getenv("GDK_SCALE"))
+        {
+            gdk_x11_display_set_window_scale(m_pGdkDisplay, 1);
+        }
+    }
+#endif
+
+    gtk_widget_set_default_direction(AllSettings::GetLayoutRTL() ? GTK_TEXT_DIR_RTL : GTK_TEXT_DIR_LTR);
+}
+
+GtkSalDisplay::~GtkSalDisplay()
+{
+    gdk_window_remove_filter( nullptr, call_filterGdkEvent, this );
+
+    if( !m_bStartupCompleted )
+        gdk_notify_startup_complete();
+
+    for(GdkCursor* & rpCsr : m_aCursors)
+        if( rpCsr )
+            gdk_cursor_unref( rpCsr );
+}
+
+extern "C" {
+
+void signalScreenSizeChanged( GdkScreen* pScreen, gpointer data )
+{
+    GtkSalDisplay* pDisp = static_cast<GtkSalDisplay*>(data);
+    pDisp->screenSizeChanged( pScreen );
+}
+
+void signalMonitorsChanged( GdkScreen* pScreen, gpointer data )
+{
+    GtkSalDisplay* pDisp = static_cast<GtkSalDisplay*>(data);
+    pDisp->monitorsChanged( pScreen );
+}
+
+}
+
+GdkFilterReturn GtkSalDisplay::filterGdkEvent( GdkXEvent* sys_event,
+                                               GdkEvent* )
+{
+    (void) this; // loplugin:staticmethods
+    (void) sys_event;
+    //FIXME: implement filterGdkEvent ...
+    return GDK_FILTER_CONTINUE;
+}
+
+void GtkSalDisplay::screenSizeChanged( GdkScreen* pScreen )
+{
+    m_pSys->countScreenMonitors();
+    if (pScreen)
+        emitDisplayChanged();
+}
+
+void GtkSalDisplay::monitorsChanged( GdkScreen* pScreen )
+{
+    m_pSys->countScreenMonitors();
+    if (pScreen)
+        emitDisplayChanged();
+}
+
+namespace
+{
+    //cairo annoyingly won't take raw xbm data unless it fits
+    //the required cairo stride
+    unsigned char* ensurePaddedForCairo(const unsigned char *pXBM,
+        int nWidth, int nHeight, int nStride)
+    {
+        unsigned char *pPaddedXBM = const_cast<unsigned char*>(pXBM);
+
+        int bytes_per_row = (nWidth + 7) / 8;
+
+        if (nStride != bytes_per_row)
+        {
+            pPaddedXBM = new unsigned char[nStride * nHeight];
+            for (int row = 0; row < nHeight; ++row)
+            {
+                memcpy(pPaddedXBM + (nStride * row),
+                    pXBM + (bytes_per_row * row), bytes_per_row);
+                memset(pPaddedXBM + (nStride * row) + bytes_per_row,
+                    0, nStride - bytes_per_row);
+            }
+        }
+
+        return pPaddedXBM;
+    }
+}
+
+GdkCursor* GtkSalDisplay::getFromXBM( const unsigned char *pBitmap,
+                                      const unsigned char *pMask,
+                                      int nWidth, int nHeight,
+                                      int nXHot, int nYHot )
+{
+    int cairo_stride = cairo_format_stride_for_width(CAIRO_FORMAT_A1, nWidth);
+
+    unsigned char *pPaddedXBM = ensurePaddedForCairo(pBitmap, nWidth, nHeight, cairo_stride);
+    cairo_surface_t *s = cairo_image_surface_create_for_data(
+        pPaddedXBM,
+        CAIRO_FORMAT_A1, nWidth, nHeight,
+        cairo_stride);
+
+    cairo_t *cr = cairo_create(s);
+    unsigned char *pPaddedMaskXBM = ensurePaddedForCairo(pMask, nWidth, nHeight, cairo_stride);
+    cairo_surface_t *mask = cairo_image_surface_create_for_data(
+        pPaddedMaskXBM,
+        CAIRO_FORMAT_A1, nWidth, nHeight,
+        cairo_stride);
+    cairo_mask_surface(cr, mask, 0, 0);
+    cairo_destroy(cr);
+    cairo_surface_destroy(mask);
+    if (pPaddedMaskXBM != pMask)
+        delete [] pPaddedMaskXBM;
+
+    GdkPixbuf *pixbuf = gdk_pixbuf_get_from_surface(s, 0, 0, nWidth, nHeight);
+    cairo_surface_destroy(s);
+    if (pPaddedXBM != pBitmap)
+        delete [] pPaddedXBM;
+
+    GdkCursor *cursor = gdk_cursor_new_from_pixbuf(m_pGdkDisplay, pixbuf, nXHot, nYHot);
+    g_object_unref(pixbuf);
+
+    return cursor;
+}
+
+#define MAKE_CURSOR( vcl_name, name ) \
+    case vcl_name: \
+        pCursor = getFromXBM( name##curs##_bits, name##mask##_bits, \
+                              name##curs_width, name##curs_height, \
+                              name##curs_x_hot, name##curs_y_hot ); \
+        break
+#define MAP_BUILTIN( vcl_name, gdk_name ) \
+        case vcl_name: \
+            pCursor = gdk_cursor_new_for_display( m_pGdkDisplay, gdk_name ); \
+            break
+
+GdkCursor *GtkSalDisplay::getCursor( PointerStyle ePointerStyle )
+{
+    if ( !m_aCursors[ ePointerStyle ] )
+    {
+        GdkCursor *pCursor = nullptr;
+
+        switch( ePointerStyle )
+        {
+            MAP_BUILTIN( PointerStyle::Arrow, GDK_LEFT_PTR );
+            MAP_BUILTIN( PointerStyle::Text, GDK_XTERM );
+            MAP_BUILTIN( PointerStyle::Help, GDK_QUESTION_ARROW );
+            MAP_BUILTIN( PointerStyle::Cross, GDK_CROSSHAIR );
+            MAP_BUILTIN( PointerStyle::Wait, GDK_WATCH );
+
+            MAP_BUILTIN( PointerStyle::NSize, GDK_SB_V_DOUBLE_ARROW );
+            MAP_BUILTIN( PointerStyle::SSize, GDK_SB_V_DOUBLE_ARROW );
+            MAP_BUILTIN( PointerStyle::WSize, GDK_SB_H_DOUBLE_ARROW );
+            MAP_BUILTIN( PointerStyle::ESize, GDK_SB_H_DOUBLE_ARROW );
+
+            MAP_BUILTIN( PointerStyle::NWSize, GDK_TOP_LEFT_CORNER );
+            MAP_BUILTIN( PointerStyle::NESize, GDK_TOP_RIGHT_CORNER );
+            MAP_BUILTIN( PointerStyle::SWSize, GDK_BOTTOM_LEFT_CORNER );
+            MAP_BUILTIN( PointerStyle::SESize, GDK_BOTTOM_RIGHT_CORNER );
+
+            MAP_BUILTIN( PointerStyle::WindowNSize, GDK_TOP_SIDE );
+            MAP_BUILTIN( PointerStyle::WindowSSize, GDK_BOTTOM_SIDE );
+            MAP_BUILTIN( PointerStyle::WindowWSize, GDK_LEFT_SIDE );
+            MAP_BUILTIN( PointerStyle::WindowESize, GDK_RIGHT_SIDE );
+
+            MAP_BUILTIN( PointerStyle::WindowNWSize, GDK_TOP_LEFT_CORNER );
+            MAP_BUILTIN( PointerStyle::WindowNESize, GDK_TOP_RIGHT_CORNER );
+            MAP_BUILTIN( PointerStyle::WindowSWSize, GDK_BOTTOM_LEFT_CORNER );
+            MAP_BUILTIN( PointerStyle::WindowSESize, GDK_BOTTOM_RIGHT_CORNER );
+
+            MAP_BUILTIN( PointerStyle::HSizeBar, GDK_SB_H_DOUBLE_ARROW );
+            MAP_BUILTIN( PointerStyle::VSizeBar, GDK_SB_V_DOUBLE_ARROW );
+
+            MAP_BUILTIN( PointerStyle::RefHand, GDK_HAND2 );
+            MAP_BUILTIN( PointerStyle::Hand, GDK_HAND2 );
+            MAP_BUILTIN( PointerStyle::Pen, GDK_PENCIL );
+
+            MAP_BUILTIN( PointerStyle::HSplit, GDK_SB_H_DOUBLE_ARROW );
+            MAP_BUILTIN( PointerStyle::VSplit, GDK_SB_V_DOUBLE_ARROW );
+
+            MAP_BUILTIN( PointerStyle::Move, GDK_FLEUR );
+
+            MAKE_CURSOR( PointerStyle::Null, null );
+            MAKE_CURSOR( PointerStyle::Magnify, magnify_ );
+            MAKE_CURSOR( PointerStyle::Fill, fill_ );
+            MAKE_CURSOR( PointerStyle::MoveData, movedata_ );
+            MAKE_CURSOR( PointerStyle::CopyData, copydata_ );
+            MAKE_CURSOR( PointerStyle::MoveFile, movefile_ );
+            MAKE_CURSOR( PointerStyle::CopyFile, copyfile_ );
+            MAKE_CURSOR( PointerStyle::MoveFiles, movefiles_ );
+            MAKE_CURSOR( PointerStyle::CopyFiles, copyfiles_ );
+            MAKE_CURSOR( PointerStyle::NotAllowed, nodrop_ );
+            MAKE_CURSOR( PointerStyle::Rotate, rotate_ );
+            MAKE_CURSOR( PointerStyle::HShear, hshear_ );
+            MAKE_CURSOR( PointerStyle::VShear, vshear_ );
+            MAKE_CURSOR( PointerStyle::DrawLine, drawline_ );
+            MAKE_CURSOR( PointerStyle::DrawRect, drawrect_ );
+            MAKE_CURSOR( PointerStyle::DrawPolygon, drawpolygon_ );
+            MAKE_CURSOR( PointerStyle::DrawBezier, drawbezier_ );
+            MAKE_CURSOR( PointerStyle::DrawArc, drawarc_ );
+            MAKE_CURSOR( PointerStyle::DrawPie, drawpie_ );
+            MAKE_CURSOR( PointerStyle::DrawCircleCut, drawcirclecut_ );
+            MAKE_CURSOR( PointerStyle::DrawEllipse, drawellipse_ );
+            MAKE_CURSOR( PointerStyle::DrawConnect, drawconnect_ );
+            MAKE_CURSOR( PointerStyle::DrawText, drawtext_ );
+            MAKE_CURSOR( PointerStyle::Mirror, mirror_ );
+            MAKE_CURSOR( PointerStyle::Crook, crook_ );
+            MAKE_CURSOR( PointerStyle::Crop, crop_ );
+            MAKE_CURSOR( PointerStyle::MovePoint, movepoint_ );
+            MAKE_CURSOR( PointerStyle::MoveBezierWeight, movebezierweight_ );
+            MAKE_CURSOR( PointerStyle::DrawFreehand, drawfreehand_ );
+            MAKE_CURSOR( PointerStyle::DrawCaption, drawcaption_ );
+            MAKE_CURSOR( PointerStyle::LinkData, linkdata_ );
+            MAKE_CURSOR( PointerStyle::MoveDataLink, movedlnk_ );
+            MAKE_CURSOR( PointerStyle::CopyDataLink, copydlnk_ );
+            MAKE_CURSOR( PointerStyle::LinkFile, linkfile_ );
+            MAKE_CURSOR( PointerStyle::MoveFileLink, moveflnk_ );
+            MAKE_CURSOR( PointerStyle::CopyFileLink, copyflnk_ );
+            MAKE_CURSOR( PointerStyle::Chart, chart_ );
+            MAKE_CURSOR( PointerStyle::Detective, detective_ );
+            MAKE_CURSOR( PointerStyle::PivotCol, pivotcol_ );
+            MAKE_CURSOR( PointerStyle::PivotRow, pivotrow_ );
+            MAKE_CURSOR( PointerStyle::PivotField, pivotfld_ );
+            MAKE_CURSOR( PointerStyle::PivotDelete, pivotdel_ );
+            MAKE_CURSOR( PointerStyle::Chain, chain_ );
+            MAKE_CURSOR( PointerStyle::ChainNotAllowed, chainnot_ );
+            MAKE_CURSOR( PointerStyle::TimeEventMove, timemove_ );
+            MAKE_CURSOR( PointerStyle::TimeEventSize, timesize_ );
+            MAKE_CURSOR( PointerStyle::AutoScrollN, asn_ );
+            MAKE_CURSOR( PointerStyle::AutoScrollS, ass_ );
+            MAKE_CURSOR( PointerStyle::AutoScrollW, asw_ );
+            MAKE_CURSOR( PointerStyle::AutoScrollE, ase_ );
+            MAKE_CURSOR( PointerStyle::AutoScrollNW, asnw_ );
+            MAKE_CURSOR( PointerStyle::AutoScrollNE, asne_ );
+            MAKE_CURSOR( PointerStyle::AutoScrollSW, assw_ );
+            MAKE_CURSOR( PointerStyle::AutoScrollSE, asse_ );
+            MAKE_CURSOR( PointerStyle::AutoScrollNS, asns_ );
+            MAKE_CURSOR( PointerStyle::AutoScrollWE, aswe_ );
+            MAKE_CURSOR( PointerStyle::AutoScrollNSWE, asnswe_ );
+            MAKE_CURSOR( PointerStyle::Airbrush, airbrush_ );
+            MAKE_CURSOR( PointerStyle::TextVertical, vertcurs_ );
+
+            // #i32329#
+            MAKE_CURSOR( PointerStyle::TabSelectS, tblsels_ );
+            MAKE_CURSOR( PointerStyle::TabSelectE, tblsele_ );
+            MAKE_CURSOR( PointerStyle::TabSelectSE, tblselse_ );
+            MAKE_CURSOR( PointerStyle::TabSelectW, tblselw_ );
+            MAKE_CURSOR( PointerStyle::TabSelectSW, tblselsw_ );
+
+            // #i20119#
+            MAKE_CURSOR( PointerStyle::Paintbrush, paintbrush_ );
+
+            MAKE_CURSOR( PointerStyle::HideWhitespace, hidewhitespace_ );
+            MAKE_CURSOR( PointerStyle::ShowWhitespace, showwhitespace_ );
+
+        default:
+            SAL_WARN( "vcl.gtk", "pointer " << static_cast<int>(ePointerStyle) << "not implemented" );
+            break;
+        }
+        if( !pCursor )
+            pCursor = gdk_cursor_new_for_display( m_pGdkDisplay, GDK_LEFT_PTR );
+
+        m_aCursors[ ePointerStyle ] = pCursor;
+    }
+
+    return m_aCursors[ ePointerStyle ];
+}
+
+int GtkSalDisplay::CaptureMouse( SalFrame* pSFrame )
+{
+    GtkSalFrame* pFrame = static_cast<GtkSalFrame*>(pSFrame);
+
+    if( !pFrame )
+    {
+        if( m_pCapture )
+            static_cast<GtkSalFrame*>(m_pCapture)->grabPointer( FALSE );
+        m_pCapture = nullptr;
+        return 0;
+    }
+
+    if( m_pCapture )
+    {
+        if( pFrame == m_pCapture )
+            return 1;
+        static_cast<GtkSalFrame*>(m_pCapture)->grabPointer( FALSE );
+    }
+
+    m_pCapture = pFrame;
+    static_cast<GtkSalFrame*>(pFrame)->grabPointer( TRUE );
+    return 1;
+}
+
+/**********************************************************************
+ * class GtkData                                                      *
+ **********************************************************************/
+
+GtkData::GtkData( SalInstance *pInstance )
+    : SalGenericData( SAL_DATA_GTK3, pInstance )
+    , m_aDispatchMutex()
+    , blockIdleTimeout( false )
+{
+    m_pUserEvent = nullptr;
+    m_aDispatchCondition = osl_createCondition();
+}
+
+#if defined(GDK_WINDOWING_X11)
+XIOErrorHandler aOrigXIOErrorHandler = nullptr;
+
+extern "C" {
+
+static int XIOErrorHdl(Display *)
+{
+    fprintf(stderr, "X IO Error\n");
+    _exit(1);
+        // avoid crashes in unrelated threads that still run while atexit
+        // handlers are in progress
+}
+
+}
+#endif
+
+GtkData::~GtkData()
+{
+    Yield( true, true );
+    g_warning ("TESTME: We used to have a stop-timer here, but the central code should do this");
+
+     // sanity check: at this point nobody should be yielding, but wake them
+     // up anyway before the condition they're waiting on gets destroyed.
+    osl_setCondition( m_aDispatchCondition );
+
+    osl::MutexGuard g( m_aDispatchMutex );
+    if (m_pUserEvent)
+    {
+        g_source_destroy (m_pUserEvent);
+        g_source_unref (m_pUserEvent);
+        m_pUserEvent = nullptr;
+    }
+    osl_destroyCondition( m_aDispatchCondition );
+#if defined(GDK_WINDOWING_X11)
+    if (GDK_IS_X11_DISPLAY(gdk_display_get_default()))
+        XSetIOErrorHandler(aOrigXIOErrorHandler);
+#endif
+}
+
+void GtkData::Dispose()
+{
+    deInitNWF();
+}
+
+/// Allows events to be processed, returns true if we processed an event.
+SalYieldResult GtkData::Yield( bool bWait, bool bHandleAllCurrentEvents )
+{
+    blockIdleTimeout = !bWait;
+
+    /* #i33212# only enter g_main_context_iteration in one thread at any one
+     * time, else one of them potentially will never end as long as there is
+     * another thread in there. Having only one yielding thread actually dispatch
+     * fits the vcl event model (see e.g. the generic plugin).
+     */
+    bool bDispatchThread = false;
+    bool bWasEvent = false;
+    {
+        // release YieldMutex (and re-acquire at block end)
+        SalYieldMutexReleaser aReleaser;
+        if( m_aDispatchMutex.tryToAcquire() )
+            bDispatchThread = true;
+        else if( ! bWait )
+        {
+            blockIdleTimeout = false;
+            return SalYieldResult::TIMEOUT; // someone else is waiting already, return
+        }
+
+        if( bDispatchThread )
+        {
+            int nMaxEvents = bHandleAllCurrentEvents ? 100 : 1;
+            gboolean wasOneEvent = TRUE;
+            while( nMaxEvents-- && wasOneEvent )
+            {
+                wasOneEvent = g_main_context_iteration( nullptr, bWait && !bWasEvent );
+                if( wasOneEvent )
+                    bWasEvent = true;
+            }
+        }
+        else if( bWait )
+        {
+            /* #i41693# in case the dispatch thread hangs in join
+             * for this thread the condition will never be set
+             * workaround: timeout of 1 second a emergency exit
+             */
+            // we are the dispatch thread
+            osl_resetCondition( m_aDispatchCondition );
+            TimeValue aValue = { 1, 0 };
+            osl_waitCondition( m_aDispatchCondition, &aValue );
+        }
+    }
+
+    if( bDispatchThread )
+    {
+        m_aDispatchMutex.release();
+        if( bWasEvent )
+            osl_setCondition( m_aDispatchCondition ); // trigger non dispatch thread yields
+    }
+    blockIdleTimeout = false;
+
+    return bWasEvent ? SalYieldResult::EVENT
+                     : SalYieldResult::TIMEOUT;
+}
+
+void GtkData::Init()
+{
+    int i;
+    SAL_INFO( "vcl.gtk", "GtkMainloop::Init()" );
+    XrmInitialize();
+
+    /*
+     * open connection to X11 Display
+     * try in this order:
+     *  o  -display command line parameter,
+     *  o  $DISPLAY environment variable
+     *  o  default display
+     */
+
+    GdkDisplay *pGdkDisp = nullptr;
+
+    // is there a -display command line parameter?
+    rtl_TextEncoding aEnc = osl_getThreadTextEncoding();
+    int nParams = osl_getCommandArgCount();
+    OString aDisplay;
+    OUString aParam, aBin;
+    char** pCmdLineAry = new char*[ nParams+1 ];
+    osl_getExecutableFile( &aParam.pData );
+    osl_getSystemPathFromFileURL( aParam.pData, &aBin.pData );
+    pCmdLineAry[0] = g_strdup( OUStringToOString( aBin, aEnc ).getStr() );
+    for (i=0; i<nParams; i++)
+    {
+        osl_getCommandArg(i, &aParam.pData );
+        OString aBParam( OUStringToOString( aParam, aEnc ) );
+
+        if( aParam == "-display" || aParam == "--display" )
+        {
+            pCmdLineAry[i+1] = g_strdup( "--display" );
+            osl_getCommandArg(i+1, &aParam.pData );
+            aDisplay = OUStringToOString( aParam, aEnc );
+        }
+        else
+            pCmdLineAry[i+1] = g_strdup( aBParam.getStr() );
+    }
+    // add executable
+    nParams++;
+
+    g_set_application_name(SalGenericSystem::getFrameClassName());
+
+    // Set consistent name of the root accessible
+    OUString aAppName = Application::GetAppName();
+    if( !aAppName.isEmpty() )
+    {
+        OString aPrgName = OUStringToOString(aAppName, aEnc);
+        g_set_prgname(aPrgName.getStr());
+    }
+
+    // init gtk/gdk
+    gtk_init_check( &nParams, &pCmdLineAry );
+    gdk_error_trap_push();
+
+    for (i = 0; i < nParams; i++ )
+        g_free( pCmdLineAry[i] );
+    delete [] pCmdLineAry;
+
+#if OSL_DEBUG_LEVEL > 1
+    if (g_getenv("SAL_DEBUG_UPDATES"))
+        gdk_window_set_debug_updates (TRUE);
+#endif
+
+    pGdkDisp = gdk_display_get_default();
+    if ( !pGdkDisp )
+    {
+        OUString aProgramFileURL;
+        osl_getExecutableFile( &aProgramFileURL.pData );
+        OUString aProgramSystemPath;
+        osl_getSystemPathFromFileURL (aProgramFileURL.pData, &aProgramSystemPath.pData);
+        OString  aProgramName = OUStringToOString(
+                                            aProgramSystemPath,
+                                            osl_getThreadTextEncoding() );
+        fprintf( stderr, "%s X11 error: Can't open display: %s\n",
+                aProgramName.getStr(), aDisplay.getStr());
+        fprintf( stderr, "   Set DISPLAY environment variable, use -display option\n");
+        fprintf( stderr, "   or check permissions of your X-Server\n");
+        fprintf( stderr, "   (See \"man X\" resp. \"man xhost\" for details)\n");
+        fflush( stderr );
+        exit(0);
+    }
+
+#if defined(GDK_WINDOWING_X11)
+    if (GDK_IS_X11_DISPLAY(pGdkDisp))
+        aOrigXIOErrorHandler = XSetIOErrorHandler(XIOErrorHdl);
+#endif
+
+    GtkSalDisplay *pDisplay = new GtkSalDisplay( pGdkDisp );
+    SetDisplay( pDisplay );
+
+    //FIXME: unwind keyboard extension bits
+
+    // add signal handler to notify screen size changes
+    int nScreens = gdk_display_get_n_screens( pGdkDisp );
+    for( int n = 0; n < nScreens; n++ )
+    {
+        GdkScreen *pScreen = gdk_display_get_screen( pGdkDisp, n );
+        if( pScreen )
+        {
+            pDisplay->screenSizeChanged( pScreen );
+            pDisplay->monitorsChanged( pScreen );
+            g_signal_connect( G_OBJECT(pScreen), "size-changed",
+                              G_CALLBACK(signalScreenSizeChanged), pDisplay );
+            g_signal_connect( G_OBJECT(pScreen), "monitors-changed",
+                              G_CALLBACK(signalMonitorsChanged), GetGtkDisplay() );
+        }
+    }
+}
+
+void GtkData::ErrorTrapPush()
+{
+    gdk_error_trap_push ();
+}
+
+bool GtkData::ErrorTrapPop( bool bIgnoreError )
+{
+    if (bIgnoreError)
+    {
+        gdk_error_trap_pop_ignored (); // faster
+        return false;
+    }
+    return gdk_error_trap_pop () != 0;
+}
+
+extern "C" {
+
+    struct SalGtkTimeoutSource {
+        GSource      aParent;
+        GTimeVal     aFireTime;
+        GtkSalTimer *pInstance;
+    };
+
+    static void sal_gtk_timeout_defer( SalGtkTimeoutSource *pTSource )
+    {
+        g_get_current_time( &pTSource->aFireTime );
+        g_time_val_add( &pTSource->aFireTime, pTSource->pInstance->m_nTimeoutMS * 1000 );
+    }
+
+    static gboolean sal_gtk_timeout_expired( SalGtkTimeoutSource *pTSource,
+                                             gint *nTimeoutMS, GTimeVal *pTimeNow )
+    {
+        glong nDeltaSec = pTSource->aFireTime.tv_sec - pTimeNow->tv_sec;
+        glong nDeltaUSec = pTSource->aFireTime.tv_usec - pTimeNow->tv_usec;
+        if( nDeltaSec < 0 || ( nDeltaSec == 0 && nDeltaUSec < 0) )
+        {
+            *nTimeoutMS = 0;
+            return TRUE;
+        }
+        if( nDeltaUSec < 0 )
+        {
+            nDeltaUSec += 1000000;
+            nDeltaSec -= 1;
+        }
+        // if the clock changes backwards we need to cope ...
+        if( (unsigned long) nDeltaSec > 1 + ( pTSource->pInstance->m_nTimeoutMS / 1000 ) )
+        {
+            sal_gtk_timeout_defer( pTSource );
+            return TRUE;
+        }
+
+        *nTimeoutMS = MIN( G_MAXINT, ( nDeltaSec * 1000 + (nDeltaUSec + 999) / 1000 ) );
+
+        return *nTimeoutMS == 0;
+    }
+
+    static gboolean sal_gtk_timeout_prepare( GSource *pSource, gint *nTimeoutMS )
+    {
+        SalGtkTimeoutSource *pTSource = reinterpret_cast<SalGtkTimeoutSource *>(pSource);
+
+        GTimeVal aTimeNow;
+        g_get_current_time( &aTimeNow );
+
+        return sal_gtk_timeout_expired( pTSource, nTimeoutMS, &aTimeNow );
+    }
+
+    static gboolean sal_gtk_timeout_check( GSource *pSource )
+    {
+        SalGtkTimeoutSource *pTSource = reinterpret_cast<SalGtkTimeoutSource *>(pSource);
+
+        GTimeVal aTimeNow;
+        g_get_current_time( &aTimeNow );
+
+        return ( pTSource->aFireTime.tv_sec < aTimeNow.tv_sec ||
+                 ( pTSource->aFireTime.tv_sec == aTimeNow.tv_sec &&
+                   pTSource->aFireTime.tv_usec < aTimeNow.tv_usec ) );
+    }
+
+    static gboolean sal_gtk_timeout_dispatch( GSource *pSource, GSourceFunc, gpointer )
+    {
+        SalGtkTimeoutSource *pTSource = reinterpret_cast<SalGtkTimeoutSource *>(pSource);
+
+        if( !pTSource->pInstance )
+            return FALSE;
+
+        GtkData *pSalData = static_cast< GtkData* >( GetSalData());
+
+        osl::Guard< comphelper::SolarMutex > aGuard( pSalData->m_pInstance->GetYieldMutex() );
+
+        sal_gtk_timeout_defer( pTSource );
+
+        ImplSVData* pSVData = ImplGetSVData();
+        if( pSVData->mpSalTimer )
+        {
+            // TODO: context_pending should be probably checked too, but it causes locking assertion failures
+            bool idle = !pSalData->BlockIdleTimeout() && /*!g_main_context_pending( NULL ) &&*/ !gdk_events_pending();
+            pSVData->mpSalTimer->CallCallback( idle );
+        }
+
+        return TRUE;
+    }
+
+    static GSourceFuncs sal_gtk_timeout_funcs =
+    {
+        sal_gtk_timeout_prepare,
+        sal_gtk_timeout_check,
+        sal_gtk_timeout_dispatch,
+        nullptr, nullptr, nullptr
+    };
+}
+
+static SalGtkTimeoutSource *
+create_sal_gtk_timeout( GtkSalTimer *pTimer )
+{
+  GSource *pSource = g_source_new( &sal_gtk_timeout_funcs, sizeof( SalGtkTimeoutSource ) );
+  SalGtkTimeoutSource *pTSource = reinterpret_cast<SalGtkTimeoutSource *>(pSource);
+  pTSource->pInstance = pTimer;
+
+  // #i36226# timers should be executed with lower priority
+  // than XEvents like in generic plugin
+  g_source_set_priority( pSource, G_PRIORITY_LOW );
+  g_source_set_can_recurse( pSource, TRUE );
+  g_source_set_callback( pSource,
+                         /* unused dummy */ g_idle_remove_by_data,
+                         nullptr, nullptr );
+  g_source_attach( pSource, g_main_context_default() );
+#ifdef DBG_UTIL
+  g_source_set_name( pSource, "VCL timeout source" );
+#endif
+
+  sal_gtk_timeout_defer( pTSource );
+
+  return pTSource;
+}
+
+GtkSalTimer::GtkSalTimer()
+    : m_pTimeout(nullptr)
+    , m_nTimeoutMS(0)
+{
+}
+
+GtkSalTimer::~GtkSalTimer()
+{
+    GtkInstance *pInstance = static_cast<GtkInstance *>(GetSalData()->m_pInstance);
+    pInstance->RemoveTimer( this );
+    Stop();
+}
+
+bool GtkSalTimer::Expired()
+{
+    if( !m_pTimeout )
+        return false;
+
+    gint nDummy = 0;
+    GTimeVal aTimeNow;
+    g_get_current_time( &aTimeNow );
+    return !!sal_gtk_timeout_expired( m_pTimeout, &nDummy, &aTimeNow);
+}
+
+void GtkSalTimer::Start( sal_uLong nMS )
+{
+    // glib is not 64bit safe in this regard.
+    assert( nMS <= G_MAXINT );
+    m_nTimeoutMS = nMS; // for restarting
+    Stop(); // FIXME: ideally re-use an existing m_pTimeout
+    m_pTimeout = create_sal_gtk_timeout( this );
+}
+
+void GtkSalTimer::Stop()
+{
+    if( m_pTimeout )
+    {
+        g_source_destroy( &m_pTimeout->aParent );
+        g_source_unref( &m_pTimeout->aParent );
+        m_pTimeout = nullptr;
+    }
+}
+
+gboolean GtkData::userEventFn( gpointer data )
+{
+    gboolean bContinue = FALSE;
+    GtkData *pThis = static_cast<GtkData *>(data);
+    SalGenericData *pData = GetGenericData();
+    osl::Guard< comphelper::SolarMutex > aGuard( pData->m_pInstance->GetYieldMutex() );
+    const SalGenericDisplay *pDisplay = pData->GetDisplay();
+    if (pDisplay)
+    {
+        OSL_ASSERT(static_cast<const SalGenericDisplay *>(pThis->GetGtkDisplay()) == pDisplay);
+        {
+            osl::MutexGuard g (pThis->GetGtkDisplay()->getEventGuardMutex());
+
+            if( !pThis->GetGtkDisplay()->HasUserEvents() )
+            {
+                if( pThis->m_pUserEvent )
+                {
+                    g_source_unref (pThis->m_pUserEvent);
+                    pThis->m_pUserEvent = nullptr;
+                }
+                bContinue = FALSE;
+            }
+            else
+                bContinue = TRUE;
+        }
+        pThis->GetGtkDisplay()->DispatchInternalEvent();
+    }
+
+    return bContinue;
+}
+
+extern "C" {
+    static gboolean call_userEventFn( void *data )
+    {
+        SolarMutexGuard aGuard;
+        return GtkData::userEventFn( data );
+    }
+}
+
+// hEventGuard_ held during this invocation
+void GtkData::PostUserEvent()
+{
+    if (m_pUserEvent)
+        g_main_context_wakeup (nullptr); // really needed ?
+    else // nothing pending anyway
+    {
+        m_pUserEvent = g_idle_source_new();
+        g_source_set_priority (m_pUserEvent, G_PRIORITY_HIGH);
+        g_source_set_can_recurse (m_pUserEvent, TRUE);
+        g_source_set_callback (m_pUserEvent, call_userEventFn,
+                               static_cast<gpointer>(this), nullptr);
+        g_source_attach (m_pUserEvent, g_main_context_default ());
+    }
+}
+
+void GtkSalDisplay::PostUserEvent()
+{
+    GetGtkSalData()->PostUserEvent();
+}
+
+void GtkSalDisplay::deregisterFrame( SalFrame* pFrame )
+{
+    if( m_pCapture == pFrame )
+    {
+        static_cast<GtkSalFrame*>(m_pCapture)->grabPointer( FALSE );
+        m_pCapture = nullptr;
+    }
+    SalGenericDisplay::deregisterFrame( pFrame );
+}
 
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