Adding upstream version 4:24.2.0.upstream/4%24.2.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1152 insertions, 0 deletions

diff --git a/vcl/source/window/stacking.cxx b/vcl/source/window/stacking.cxx
new file mode 100644
index 0000000000..c144eaa9bb
--- /dev/null
+++ b/vcl/source/window/stacking.cxx
@@ -0,0 +1,1152 @@
+/* -*- 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 .
+ */
+
+#include <vcl/syswin.hxx>
+#include <vcl/window.hxx>
+#include <vcl/taskpanelist.hxx>
+#include <sal/log.hxx>
+
+#include <salframe.hxx>
+#include <salobj.hxx>
+#include <svdata.hxx>
+#include <window.h>
+#include <brdwin.hxx>
+
+#include <com/sun/star/awt/XTopWindow.hpp>
+#include <com/sun/star/awt/XVclWindowPeer.hpp>
+
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::datatransfer::clipboard;
+using namespace ::com::sun::star::datatransfer::dnd;
+using namespace ::com::sun::star;
+
+using ::com::sun::star::awt::XTopWindow;
+
+struct ImplCalcToTopData
+{
+    std::unique_ptr<ImplCalcToTopData> mpNext;
+    VclPtr<vcl::Window>                mpWindow;
+    std::unique_ptr<vcl::Region>       mpInvalidateRegion;
+};
+
+namespace vcl {
+
+vcl::Window* Window::ImplGetTopmostFrameWindow()
+{
+    vcl::Window *pTopmostParent = this;
+    while( pTopmostParent->ImplGetParent() )
+        pTopmostParent = pTopmostParent->ImplGetParent();
+    return pTopmostParent->mpWindowImpl->mpFrameWindow;
+}
+
+void Window::ImplInsertWindow( vcl::Window* pParent )
+{
+    mpWindowImpl->mpParent            = pParent;
+    mpWindowImpl->mpRealParent        = pParent;
+
+    if ( !pParent || mpWindowImpl->mbFrame )
+        return;
+
+    // search frame window and set window frame data
+    vcl::Window* pFrameParent = pParent->mpWindowImpl->mpFrameWindow;
+    mpWindowImpl->mpFrameData = pFrameParent->mpWindowImpl->mpFrameData;
+    if (mpWindowImpl->mpFrame != pFrameParent->mpWindowImpl->mpFrame)
+    {
+        mpWindowImpl->mpFrame = pFrameParent->mpWindowImpl->mpFrame;
+        if (mpWindowImpl->mpSysObj)
+            mpWindowImpl->mpSysObj->Reparent(mpWindowImpl->mpFrame);
+    }
+    mpWindowImpl->mpFrameWindow   = pFrameParent;
+    mpWindowImpl->mbFrame         = false;
+
+    // search overlap window and insert window in list
+    if ( ImplIsOverlapWindow() )
+    {
+        vcl::Window* pFirstOverlapParent = pParent;
+        while ( !pFirstOverlapParent->ImplIsOverlapWindow() )
+            pFirstOverlapParent = pFirstOverlapParent->ImplGetParent();
+        mpWindowImpl->mpOverlapWindow = pFirstOverlapParent;
+
+        mpWindowImpl->mpNextOverlap = mpWindowImpl->mpFrameData->mpFirstOverlap;
+        mpWindowImpl->mpFrameData->mpFirstOverlap = this;
+
+        // Overlap-Windows are by default the uppermost
+        mpWindowImpl->mpNext = pFirstOverlapParent->mpWindowImpl->mpFirstOverlap;
+        pFirstOverlapParent->mpWindowImpl->mpFirstOverlap = this;
+        if ( !pFirstOverlapParent->mpWindowImpl->mpLastOverlap )
+            pFirstOverlapParent->mpWindowImpl->mpLastOverlap = this;
+        else
+            mpWindowImpl->mpNext->mpWindowImpl->mpPrev = this;
+    }
+    else
+    {
+        if ( pParent->ImplIsOverlapWindow() )
+            mpWindowImpl->mpOverlapWindow = pParent;
+        else
+            mpWindowImpl->mpOverlapWindow = pParent->mpWindowImpl->mpOverlapWindow;
+        mpWindowImpl->mpPrev = pParent->mpWindowImpl->mpLastChild;
+        pParent->mpWindowImpl->mpLastChild = this;
+        if ( !pParent->mpWindowImpl->mpFirstChild )
+            pParent->mpWindowImpl->mpFirstChild = this;
+        else
+            mpWindowImpl->mpPrev->mpWindowImpl->mpNext = this;
+    }
+}
+
+void Window::ImplRemoveWindow( bool bRemoveFrameData )
+{
+    // remove window from the lists
+    if ( !mpWindowImpl->mbFrame )
+    {
+        if ( ImplIsOverlapWindow() )
+        {
+            if ( mpWindowImpl->mpFrameData->mpFirstOverlap.get() == this )
+                mpWindowImpl->mpFrameData->mpFirstOverlap = mpWindowImpl->mpNextOverlap;
+            else
+            {
+                vcl::Window* pTempWin = mpWindowImpl->mpFrameData->mpFirstOverlap;
+                while ( pTempWin->mpWindowImpl->mpNextOverlap.get() != this )
+                    pTempWin = pTempWin->mpWindowImpl->mpNextOverlap;
+                pTempWin->mpWindowImpl->mpNextOverlap = mpWindowImpl->mpNextOverlap;
+            }
+
+            if ( mpWindowImpl->mpPrev )
+                mpWindowImpl->mpPrev->mpWindowImpl->mpNext = mpWindowImpl->mpNext;
+            else
+                mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpFirstOverlap = mpWindowImpl->mpNext;
+            if ( mpWindowImpl->mpNext )
+                mpWindowImpl->mpNext->mpWindowImpl->mpPrev = mpWindowImpl->mpPrev;
+            else
+                mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpLastOverlap = mpWindowImpl->mpPrev;
+        }
+        else
+        {
+            if ( mpWindowImpl->mpPrev )
+                mpWindowImpl->mpPrev->mpWindowImpl->mpNext = mpWindowImpl->mpNext;
+            else if ( mpWindowImpl->mpParent )
+                mpWindowImpl->mpParent->mpWindowImpl->mpFirstChild = mpWindowImpl->mpNext;
+            if ( mpWindowImpl->mpNext )
+                mpWindowImpl->mpNext->mpWindowImpl->mpPrev = mpWindowImpl->mpPrev;
+            else if ( mpWindowImpl->mpParent )
+                mpWindowImpl->mpParent->mpWindowImpl->mpLastChild = mpWindowImpl->mpPrev;
+        }
+
+        mpWindowImpl->mpPrev = nullptr;
+        mpWindowImpl->mpNext = nullptr;
+    }
+
+    if ( bRemoveFrameData )
+    {
+        // release the graphic
+        OutputDevice *pOutDev = GetOutDev();
+        pOutDev->ReleaseGraphics();
+    }
+}
+
+void Window::reorderWithinParent(sal_uInt16 nNewPosition)
+{
+    sal_uInt16 nChildCount = 0;
+    vcl::Window *pSource = mpWindowImpl->mpParent->mpWindowImpl->mpFirstChild;
+    while (pSource)
+    {
+        if (nChildCount == nNewPosition)
+            break;
+        pSource = pSource->mpWindowImpl->mpNext;
+        nChildCount++;
+    }
+
+    if (pSource == this) //already at the right place
+        return;
+
+    ImplRemoveWindow(false);
+
+    if (pSource)
+    {
+        mpWindowImpl->mpNext = pSource;
+        mpWindowImpl->mpPrev = pSource->mpWindowImpl->mpPrev;
+        pSource->mpWindowImpl->mpPrev = this;
+    }
+    else
+        mpWindowImpl->mpParent->mpWindowImpl->mpLastChild = this;
+
+    if (mpWindowImpl->mpPrev)
+        mpWindowImpl->mpPrev->mpWindowImpl->mpNext = this;
+    else
+        mpWindowImpl->mpParent->mpWindowImpl->mpFirstChild = this;
+}
+
+void Window::ImplToBottomChild()
+{
+    if ( ImplIsOverlapWindow() || mpWindowImpl->mbReallyVisible || (mpWindowImpl->mpParent->mpWindowImpl->mpLastChild.get() == this) )
+        return;
+
+    // put the window to the end of the list
+    if ( mpWindowImpl->mpPrev )
+        mpWindowImpl->mpPrev->mpWindowImpl->mpNext = mpWindowImpl->mpNext;
+    else
+        mpWindowImpl->mpParent->mpWindowImpl->mpFirstChild = mpWindowImpl->mpNext;
+    mpWindowImpl->mpNext->mpWindowImpl->mpPrev = mpWindowImpl->mpPrev;
+    mpWindowImpl->mpPrev = mpWindowImpl->mpParent->mpWindowImpl->mpLastChild;
+    mpWindowImpl->mpParent->mpWindowImpl->mpLastChild = this;
+    mpWindowImpl->mpPrev->mpWindowImpl->mpNext = this;
+    mpWindowImpl->mpNext = nullptr;
+}
+
+void Window::ImplCalcToTop( ImplCalcToTopData* pPrevData )
+{
+    SAL_WARN_IF( !ImplIsOverlapWindow(), "vcl", "Window::ImplCalcToTop(): Is not an OverlapWindow" );
+
+    if ( mpWindowImpl->mbFrame )
+        return;
+
+    if ( !IsReallyVisible() )
+        return;
+
+    // calculate region, where the window overlaps with other windows
+    vcl::Region  aRegion( GetOutputRectPixel() );
+    vcl::Region  aInvalidateRegion;
+    ImplCalcOverlapRegionOverlaps( aRegion, aInvalidateRegion );
+
+    if ( !aInvalidateRegion.IsEmpty() )
+    {
+        ImplCalcToTopData* pData    = new ImplCalcToTopData;
+        pPrevData->mpNext.reset(pData);
+        pData->mpWindow             = this;
+        pData->mpInvalidateRegion.reset(new vcl::Region( aInvalidateRegion ));
+    }
+}
+
+void Window::ImplToTop( ToTopFlags nFlags )
+{
+    SAL_WARN_IF( !ImplIsOverlapWindow(), "vcl", "Window::ImplToTop(): Is not an OverlapWindow" );
+
+    if ( mpWindowImpl->mbFrame )
+    {
+        // on a mouse click in the external window, it is the latter's
+        // responsibility to assure our frame is put in front
+        if ( !mpWindowImpl->mpFrameData->mbHasFocus &&
+             !mpWindowImpl->mpFrameData->mbSysObjFocus &&
+             !mpWindowImpl->mpFrameData->mbInSysObjFocusHdl &&
+             !mpWindowImpl->mpFrameData->mbInSysObjToTopHdl )
+        {
+            // do not bring floating windows on the client to top
+            if( !ImplGetClientWindow() || !(ImplGetClientWindow()->GetStyle() & WB_SYSTEMFLOATWIN) )
+            {
+                SalFrameToTop nSysFlags = SalFrameToTop::NONE;
+                if ( nFlags & ToTopFlags::RestoreWhenMin )
+                    nSysFlags |= SalFrameToTop::RestoreWhenMin;
+                if ( nFlags & ToTopFlags::ForegroundTask )
+                    nSysFlags |= SalFrameToTop::ForegroundTask;
+                if ( nFlags & ToTopFlags::GrabFocusOnly )
+                    nSysFlags |= SalFrameToTop::GrabFocusOnly;
+                mpWindowImpl->mpFrame->ToTop( nSysFlags );
+            }
+        }
+    }
+    else
+    {
+        if ( mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpFirstOverlap.get() != this )
+        {
+            // remove window from the list
+            mpWindowImpl->mpPrev->mpWindowImpl->mpNext = mpWindowImpl->mpNext;
+            if ( mpWindowImpl->mpNext )
+                mpWindowImpl->mpNext->mpWindowImpl->mpPrev = mpWindowImpl->mpPrev;
+            else
+                mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpLastOverlap = mpWindowImpl->mpPrev;
+
+            // take AlwaysOnTop into account
+            bool    bOnTop = IsAlwaysOnTopEnabled();
+            vcl::Window* pNextWin = mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpFirstOverlap;
+            if ( !bOnTop )
+            {
+                while ( pNextWin )
+                {
+                    if ( !pNextWin->IsAlwaysOnTopEnabled() )
+                        break;
+                    pNextWin = pNextWin->mpWindowImpl->mpNext;
+                }
+            }
+
+            // add the window to the list again
+            mpWindowImpl->mpNext = pNextWin;
+            if ( pNextWin )
+            {
+                mpWindowImpl->mpPrev = pNextWin->mpWindowImpl->mpPrev;
+                pNextWin->mpWindowImpl->mpPrev = this;
+            }
+            else
+            {
+                mpWindowImpl->mpPrev = mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpLastOverlap;
+                mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpLastOverlap = this;
+            }
+            if ( mpWindowImpl->mpPrev )
+                mpWindowImpl->mpPrev->mpWindowImpl->mpNext = this;
+            else
+                mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpFirstOverlap = this;
+
+            // recalculate ClipRegion of this and all overlapping windows
+            if ( IsReallyVisible() )
+            {
+                mpWindowImpl->mpOverlapWindow->ImplSetClipFlagOverlapWindows();
+            }
+        }
+    }
+}
+
+void Window::ImplStartToTop( ToTopFlags nFlags )
+{
+    ImplCalcToTopData   aStartData;
+    ImplCalcToTopData*  pCurData;
+    vcl::Window* pOverlapWindow;
+    if ( ImplIsOverlapWindow() )
+        pOverlapWindow = this;
+    else
+        pOverlapWindow = mpWindowImpl->mpOverlapWindow;
+
+    // first calculate paint areas
+    vcl::Window* pTempOverlapWindow = pOverlapWindow;
+    aStartData.mpNext = nullptr;
+    pCurData = &aStartData;
+    do
+    {
+        pTempOverlapWindow->ImplCalcToTop( pCurData );
+        if ( pCurData->mpNext )
+            pCurData = pCurData->mpNext.get();
+        pTempOverlapWindow = pTempOverlapWindow->mpWindowImpl->mpOverlapWindow;
+    }
+    while ( !pTempOverlapWindow->mpWindowImpl->mbFrame );
+    // next calculate the paint areas of the ChildOverlap windows
+    pTempOverlapWindow = mpWindowImpl->mpFirstOverlap;
+    while ( pTempOverlapWindow )
+    {
+        pTempOverlapWindow->ImplCalcToTop( pCurData );
+        if ( pCurData->mpNext )
+            pCurData = pCurData->mpNext.get();
+        pTempOverlapWindow = pTempOverlapWindow->mpWindowImpl->mpNext;
+    }
+
+    // and next change the windows list
+    pTempOverlapWindow = pOverlapWindow;
+    do
+    {
+        pTempOverlapWindow->ImplToTop( nFlags );
+        pTempOverlapWindow = pTempOverlapWindow->mpWindowImpl->mpOverlapWindow;
+    }
+    while ( !pTempOverlapWindow->mpWindowImpl->mbFrame );
+    // as last step invalidate the invalid areas
+    pCurData = aStartData.mpNext.get();
+    while ( pCurData )
+    {
+        pCurData->mpWindow->ImplInvalidateFrameRegion( pCurData->mpInvalidateRegion.get(), InvalidateFlags::Children );
+        pCurData = pCurData->mpNext.get();
+    }
+}
+
+void Window::ImplFocusToTop( ToTopFlags nFlags, bool bReallyVisible )
+{
+    // do we need to fetch the focus?
+    if ( !(nFlags & ToTopFlags::NoGrabFocus) )
+    {
+        // first window with GrabFocus-Activate gets the focus
+        vcl::Window* pFocusWindow = this;
+        while ( !pFocusWindow->ImplIsOverlapWindow() )
+        {
+            // if the window has no BorderWindow, we
+            // should always find the belonging BorderWindow
+            if ( !pFocusWindow->mpWindowImpl->mpBorderWindow )
+            {
+                if ( pFocusWindow->mpWindowImpl->mnActivateMode & ActivateModeFlags::GrabFocus )
+                    break;
+            }
+            pFocusWindow = pFocusWindow->ImplGetParent();
+        }
+        if ( (pFocusWindow->mpWindowImpl->mnActivateMode & ActivateModeFlags::GrabFocus) &&
+             !pFocusWindow->HasChildPathFocus( true ) )
+            pFocusWindow->GrabFocus();
+    }
+
+    if ( bReallyVisible )
+        ImplGenerateMouseMove();
+}
+
+void Window::ImplShowAllOverlaps()
+{
+    vcl::Window* pOverlapWindow = mpWindowImpl->mpFirstOverlap;
+    while ( pOverlapWindow )
+    {
+        if ( pOverlapWindow->mpWindowImpl->mbOverlapVisible )
+        {
+            pOverlapWindow->Show( true, ShowFlags::NoActivate );
+            pOverlapWindow->mpWindowImpl->mbOverlapVisible = false;
+        }
+
+        pOverlapWindow = pOverlapWindow->mpWindowImpl->mpNext;
+    }
+}
+
+void Window::ImplHideAllOverlaps()
+{
+    vcl::Window* pOverlapWindow = mpWindowImpl->mpFirstOverlap;
+    while ( pOverlapWindow )
+    {
+        if ( pOverlapWindow->IsVisible() )
+        {
+            pOverlapWindow->mpWindowImpl->mbOverlapVisible = true;
+            pOverlapWindow->Show( false );
+        }
+
+        pOverlapWindow = pOverlapWindow->mpWindowImpl->mpNext;
+    }
+}
+
+void Window::ToTop( ToTopFlags nFlags )
+{
+    if (!mpWindowImpl)
+        return;
+
+    ImplStartToTop( nFlags );
+    ImplFocusToTop( nFlags, IsReallyVisible() );
+}
+
+void Window::SetZOrder( vcl::Window* pRefWindow, ZOrderFlags nFlags )
+{
+
+    if ( mpWindowImpl->mpBorderWindow )
+    {
+        mpWindowImpl->mpBorderWindow->SetZOrder( pRefWindow, nFlags );
+        return;
+    }
+
+    if ( nFlags & ZOrderFlags::First )
+    {
+        if ( ImplIsOverlapWindow() )
+            pRefWindow = mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpFirstOverlap;
+        else
+            pRefWindow = mpWindowImpl->mpParent->mpWindowImpl->mpFirstChild;
+        nFlags |= ZOrderFlags::Before;
+    }
+    else if ( nFlags & ZOrderFlags::Last )
+    {
+        if ( ImplIsOverlapWindow() )
+            pRefWindow = mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpLastOverlap;
+        else
+            pRefWindow = mpWindowImpl->mpParent->mpWindowImpl->mpLastChild;
+        nFlags |= ZOrderFlags::Behind;
+    }
+
+    while ( pRefWindow && pRefWindow->mpWindowImpl->mpBorderWindow )
+        pRefWindow = pRefWindow->mpWindowImpl->mpBorderWindow;
+    if (!pRefWindow || pRefWindow == this || mpWindowImpl->mbFrame)
+        return;
+
+    SAL_WARN_IF( pRefWindow->mpWindowImpl->mpParent != mpWindowImpl->mpParent, "vcl", "Window::SetZOrder() - pRefWindow has other parent" );
+    if ( nFlags & ZOrderFlags::Before )
+    {
+        if ( pRefWindow->mpWindowImpl->mpPrev.get() == this )
+            return;
+
+        if ( ImplIsOverlapWindow() )
+        {
+            if ( mpWindowImpl->mpPrev )
+                mpWindowImpl->mpPrev->mpWindowImpl->mpNext = mpWindowImpl->mpNext;
+            else
+                mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpFirstOverlap = mpWindowImpl->mpNext;
+            if ( mpWindowImpl->mpNext )
+                mpWindowImpl->mpNext->mpWindowImpl->mpPrev = mpWindowImpl->mpPrev;
+            else
+                mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpLastOverlap = mpWindowImpl->mpPrev;
+            if ( !pRefWindow->mpWindowImpl->mpPrev )
+                mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpFirstOverlap = this;
+        }
+        else
+        {
+            if ( mpWindowImpl->mpPrev )
+                mpWindowImpl->mpPrev->mpWindowImpl->mpNext = mpWindowImpl->mpNext;
+            else
+                mpWindowImpl->mpParent->mpWindowImpl->mpFirstChild = mpWindowImpl->mpNext;
+            if ( mpWindowImpl->mpNext )
+                mpWindowImpl->mpNext->mpWindowImpl->mpPrev = mpWindowImpl->mpPrev;
+            else
+                mpWindowImpl->mpParent->mpWindowImpl->mpLastChild = mpWindowImpl->mpPrev;
+            if ( !pRefWindow->mpWindowImpl->mpPrev )
+                mpWindowImpl->mpParent->mpWindowImpl->mpFirstChild = this;
+        }
+
+        mpWindowImpl->mpPrev = pRefWindow->mpWindowImpl->mpPrev;
+        mpWindowImpl->mpNext = pRefWindow;
+        if ( mpWindowImpl->mpPrev )
+            mpWindowImpl->mpPrev->mpWindowImpl->mpNext = this;
+        mpWindowImpl->mpNext->mpWindowImpl->mpPrev = this;
+    }
+    else if ( nFlags & ZOrderFlags::Behind )
+    {
+        if ( pRefWindow->mpWindowImpl->mpNext.get() == this )
+            return;
+
+        if ( ImplIsOverlapWindow() )
+        {
+            if ( mpWindowImpl->mpPrev )
+                mpWindowImpl->mpPrev->mpWindowImpl->mpNext = mpWindowImpl->mpNext;
+            else
+                mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpFirstOverlap = mpWindowImpl->mpNext;
+            if ( mpWindowImpl->mpNext )
+                mpWindowImpl->mpNext->mpWindowImpl->mpPrev = mpWindowImpl->mpPrev;
+            else
+                mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpLastOverlap = mpWindowImpl->mpPrev;
+            if ( !pRefWindow->mpWindowImpl->mpNext )
+                mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpLastOverlap = this;
+        }
+        else
+        {
+            if ( mpWindowImpl->mpPrev )
+                mpWindowImpl->mpPrev->mpWindowImpl->mpNext = mpWindowImpl->mpNext;
+            else
+                mpWindowImpl->mpParent->mpWindowImpl->mpFirstChild = mpWindowImpl->mpNext;
+            if ( mpWindowImpl->mpNext )
+                mpWindowImpl->mpNext->mpWindowImpl->mpPrev = mpWindowImpl->mpPrev;
+            else
+                mpWindowImpl->mpParent->mpWindowImpl->mpLastChild = mpWindowImpl->mpPrev;
+            if ( !pRefWindow->mpWindowImpl->mpNext )
+                mpWindowImpl->mpParent->mpWindowImpl->mpLastChild = this;
+        }
+
+        mpWindowImpl->mpPrev = pRefWindow;
+        mpWindowImpl->mpNext = pRefWindow->mpWindowImpl->mpNext;
+        if ( mpWindowImpl->mpNext )
+            mpWindowImpl->mpNext->mpWindowImpl->mpPrev = this;
+        mpWindowImpl->mpPrev->mpWindowImpl->mpNext = this;
+    }
+
+    if ( !IsReallyVisible() )
+        return;
+
+    if ( !mpWindowImpl->mbInitWinClipRegion && mpWindowImpl->maWinClipRegion.IsEmpty() )
+        return;
+
+    bool bInitWinClipRegion = mpWindowImpl->mbInitWinClipRegion;
+    ImplSetClipFlag();
+
+    // When ClipRegion was not initialised, assume
+    // the window has not been sent, therefore do not
+    // trigger any Invalidates. This is an optimization
+    // for HTML documents with many controls. If this
+    // check gives problems, a flag should be introduced
+    // which tracks whether the window has already been
+    // emitted after Show
+    if ( bInitWinClipRegion )
+        return;
+
+    // Invalidate all windows which are next to each other
+    // Is INCOMPLETE !!!
+    tools::Rectangle   aWinRect = GetOutputRectPixel();
+    vcl::Window*     pWindow = nullptr;
+    if ( ImplIsOverlapWindow() )
+    {
+        if ( mpWindowImpl->mpOverlapWindow )
+            pWindow = mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpFirstOverlap;
+    }
+    else
+        pWindow = ImplGetParent()->mpWindowImpl->mpFirstChild;
+    // Invalidate all windows in front of us and which are covered by us
+    while ( pWindow )
+    {
+        if ( pWindow == this )
+            break;
+        tools::Rectangle aCompRect = pWindow->GetOutputRectPixel();
+        if ( aWinRect.Overlaps( aCompRect ) )
+            pWindow->Invalidate( InvalidateFlags::Children | InvalidateFlags::NoTransparent );
+        pWindow = pWindow->mpWindowImpl->mpNext;
+    }
+
+    // If we are covered by a window in the background
+    // we should redraw it
+    while ( pWindow )
+    {
+        if ( pWindow != this )
+        {
+            tools::Rectangle aCompRect = pWindow->GetOutputRectPixel();
+            if ( aWinRect.Overlaps( aCompRect ) )
+            {
+                Invalidate( InvalidateFlags::Children | InvalidateFlags::NoTransparent );
+                break;
+            }
+        }
+        pWindow = pWindow->mpWindowImpl->mpNext;
+    }
+}
+
+void Window::EnableAlwaysOnTop( bool bEnable )
+{
+
+    mpWindowImpl->mbAlwaysOnTop = bEnable;
+
+    if ( mpWindowImpl->mpBorderWindow )
+        mpWindowImpl->mpBorderWindow->EnableAlwaysOnTop( bEnable );
+    else if ( bEnable && IsReallyVisible() )
+        ToTop();
+
+    if ( mpWindowImpl->mbFrame )
+        mpWindowImpl->mpFrame->SetAlwaysOnTop( bEnable );
+}
+
+bool Window::IsTopWindow() const
+{
+    if ( !mpWindowImpl || mpWindowImpl->mbInDispose )
+        return false;
+
+    // topwindows must be frames or they must have a borderwindow which is a frame
+    if( !mpWindowImpl->mbFrame && (!mpWindowImpl->mpBorderWindow || !mpWindowImpl->mpBorderWindow->mpWindowImpl->mbFrame ) )
+        return false;
+
+    ImplGetWinData();
+    if( mpWindowImpl->mpWinData->mnIsTopWindow == sal_uInt16(~0))    // still uninitialized
+    {
+        // #113722#, cache result of expensive queryInterface call
+        vcl::Window *pThisWin = const_cast<vcl::Window*>(this);
+        uno::Reference< XTopWindow > xTopWindow( pThisWin->GetComponentInterface(), UNO_QUERY );
+        pThisWin->mpWindowImpl->mpWinData->mnIsTopWindow = xTopWindow.is() ? 1 : 0;
+    }
+    return mpWindowImpl->mpWinData->mnIsTopWindow == 1;
+}
+
+vcl::Window* Window::ImplFindWindow( const Point& rFramePos )
+{
+    vcl::Window* pTempWindow;
+    vcl::Window* pFindWindow;
+
+    // first check all overlapping windows
+    pTempWindow = mpWindowImpl->mpFirstOverlap;
+    while ( pTempWindow )
+    {
+        pFindWindow = pTempWindow->ImplFindWindow( rFramePos );
+        if ( pFindWindow )
+            return pFindWindow;
+        pTempWindow = pTempWindow->mpWindowImpl->mpNext;
+    }
+
+    // then we check our window
+    if ( !mpWindowImpl->mbVisible )
+        return nullptr;
+
+    WindowHitTest nHitTest = ImplHitTest( rFramePos );
+    if ( nHitTest & WindowHitTest::Inside )
+    {
+        // and then we check all child windows
+        pTempWindow = mpWindowImpl->mpFirstChild;
+        while ( pTempWindow )
+        {
+            pFindWindow = pTempWindow->ImplFindWindow( rFramePos );
+            if ( pFindWindow )
+                return pFindWindow;
+            pTempWindow = pTempWindow->mpWindowImpl->mpNext;
+        }
+
+        if ( nHitTest & WindowHitTest::Transparent )
+            return nullptr;
+        else
+            return this;
+    }
+
+    return nullptr;
+}
+
+bool Window::ImplIsRealParentPath( const vcl::Window* pWindow ) const
+{
+    pWindow = pWindow->GetParent();
+    while ( pWindow )
+    {
+        if ( pWindow == this )
+            return true;
+        pWindow = pWindow->GetParent();
+    }
+
+    return false;
+}
+
+bool Window::ImplIsChild( const vcl::Window* pWindow, bool bSystemWindow ) const
+{
+    do
+    {
+        if ( !bSystemWindow && pWindow->ImplIsOverlapWindow() )
+            break;
+
+        pWindow = pWindow->ImplGetParent();
+
+        if ( pWindow == this )
+            return true;
+    }
+    while ( pWindow );
+
+    return false;
+}
+
+bool Window::ImplIsWindowOrChild( const vcl::Window* pWindow, bool bSystemWindow ) const
+{
+    if ( this == pWindow )
+        return true;
+    return ImplIsChild( pWindow, bSystemWindow );
+}
+
+void Window::ImplResetReallyVisible()
+{
+    bool bBecameReallyInvisible = mpWindowImpl->mbReallyVisible;
+
+    GetOutDev()->mbDevOutput     = false;
+    mpWindowImpl->mbReallyVisible = false;
+    mpWindowImpl->mbReallyShown   = false;
+
+    // the SHOW/HIDE events serve as indicators to send child creation/destroy events to the access bridge.
+    // For this, the data member of the event must not be NULL.
+    // Previously, we did this in Window::Show, but there some events got lost in certain situations.
+    if( bBecameReallyInvisible && ImplIsAccessibleCandidate() )
+        CallEventListeners( VclEventId::WindowHide, this );
+        // TODO. It's kind of a hack that we're re-using the VclEventId::WindowHide. Normally, we should
+        // introduce another event which explicitly triggers the Accessibility implementations.
+
+    vcl::Window* pWindow = mpWindowImpl->mpFirstOverlap;
+    while ( pWindow )
+    {
+        if ( pWindow->mpWindowImpl->mbReallyVisible )
+            pWindow->ImplResetReallyVisible();
+        pWindow = pWindow->mpWindowImpl->mpNext;
+    }
+
+    pWindow = mpWindowImpl->mpFirstChild;
+    while ( pWindow )
+    {
+        if ( pWindow->mpWindowImpl->mbReallyVisible )
+            pWindow->ImplResetReallyVisible();
+        pWindow = pWindow->mpWindowImpl->mpNext;
+    }
+}
+
+void Window::ImplUpdateWindowPtr( vcl::Window* pWindow )
+{
+    if ( mpWindowImpl->mpFrameWindow != pWindow->mpWindowImpl->mpFrameWindow )
+    {
+        // release graphic
+        OutputDevice *pOutDev = GetOutDev();
+        pOutDev->ReleaseGraphics();
+    }
+
+    mpWindowImpl->mpFrameData     = pWindow->mpWindowImpl->mpFrameData;
+    if (mpWindowImpl->mpFrame != pWindow->mpWindowImpl->mpFrame)
+    {
+        mpWindowImpl->mpFrame = pWindow->mpWindowImpl->mpFrame;
+        if (mpWindowImpl->mpSysObj)
+            mpWindowImpl->mpSysObj->Reparent(mpWindowImpl->mpFrame);
+    }
+    mpWindowImpl->mpFrameWindow   = pWindow->mpWindowImpl->mpFrameWindow;
+    if ( pWindow->ImplIsOverlapWindow() )
+        mpWindowImpl->mpOverlapWindow = pWindow;
+    else
+        mpWindowImpl->mpOverlapWindow = pWindow->mpWindowImpl->mpOverlapWindow;
+
+    vcl::Window* pChild = mpWindowImpl->mpFirstChild;
+    while ( pChild )
+    {
+        pChild->ImplUpdateWindowPtr( pWindow );
+        pChild = pChild->mpWindowImpl->mpNext;
+    }
+}
+
+void Window::ImplUpdateWindowPtr()
+{
+    vcl::Window* pChild = mpWindowImpl->mpFirstChild;
+    while ( pChild )
+    {
+        pChild->ImplUpdateWindowPtr( this );
+        pChild = pChild->mpWindowImpl->mpNext;
+    }
+}
+
+void Window::ImplUpdateOverlapWindowPtr( bool bNewFrame )
+{
+    bool bVisible = IsVisible();
+    Show( false );
+    ImplRemoveWindow( bNewFrame );
+    vcl::Window* pRealParent = mpWindowImpl->mpRealParent;
+    ImplInsertWindow( ImplGetParent() );
+    mpWindowImpl->mpRealParent = pRealParent;
+    ImplUpdateWindowPtr();
+    if ( ImplUpdatePos() )
+        ImplUpdateSysObjPos();
+
+    if ( bNewFrame )
+    {
+        vcl::Window* pOverlapWindow = mpWindowImpl->mpFirstOverlap;
+        while ( pOverlapWindow )
+        {
+            vcl::Window* pNextOverlapWindow = pOverlapWindow->mpWindowImpl->mpNext;
+            pOverlapWindow->ImplUpdateOverlapWindowPtr( bNewFrame );
+            pOverlapWindow = pNextOverlapWindow;
+        }
+    }
+
+    if ( bVisible )
+        Show();
+}
+
+SystemWindow* Window::GetSystemWindow() const
+{
+
+    const vcl::Window* pWin = this;
+    while ( pWin && !pWin->IsSystemWindow() )
+        pWin  = pWin->GetParent();
+    return static_cast<SystemWindow*>(const_cast<Window*>(pWin));
+}
+
+static SystemWindow *ImplGetLastSystemWindow( vcl::Window *pWin )
+{
+    // get the most top-level system window, the one that contains the taskpanelist
+    SystemWindow *pSysWin = nullptr;
+    if( !pWin )
+        return pSysWin;
+    vcl::Window *pMyParent = pWin;
+    while ( pMyParent )
+    {
+        if ( pMyParent->IsSystemWindow() )
+            pSysWin = static_cast<SystemWindow*>(pMyParent);
+        pMyParent = pMyParent->GetParent();
+    }
+    return pSysWin;
+}
+
+void Window::SetParent( vcl::Window* pNewParent )
+{
+    SAL_WARN_IF( !pNewParent, "vcl", "Window::SetParent(): pParent == NULL" );
+    SAL_WARN_IF( pNewParent == this, "vcl", "someone tried to reparent a window to itself" );
+
+    if( !pNewParent || pNewParent == this )
+        return;
+
+    // check if the taskpanelist would change and move the window pointer accordingly
+    SystemWindow *pSysWin = ImplGetLastSystemWindow(this);
+    SystemWindow *pNewSysWin = nullptr;
+    bool bChangeTaskPaneList = false;
+    if( pSysWin && pSysWin->ImplIsInTaskPaneList( this ) )
+    {
+        pNewSysWin = ImplGetLastSystemWindow( pNewParent );
+        if( pNewSysWin && pNewSysWin != pSysWin )
+        {
+            bChangeTaskPaneList = true;
+            pSysWin->GetTaskPaneList()->RemoveWindow( this );
+        }
+    }
+    // remove ownerdraw decorated windows from list in the top-most frame window
+    if( (GetStyle() & WB_OWNERDRAWDECORATION) && mpWindowImpl->mbFrame )
+    {
+        ::std::vector< VclPtr<vcl::Window> >& rList = ImplGetOwnerDrawList();
+        auto p = ::std::find( rList.begin(), rList.end(), VclPtr<vcl::Window>(this) );
+        if( p != rList.end() )
+            rList.erase( p );
+    }
+
+    ImplSetFrameParent( pNewParent );
+
+    if ( mpWindowImpl->mpBorderWindow )
+    {
+        mpWindowImpl->mpRealParent = pNewParent;
+        mpWindowImpl->mpBorderWindow->SetParent( pNewParent );
+        return;
+    }
+
+    if ( mpWindowImpl->mpParent.get() == pNewParent )
+        return;
+
+    if ( mpWindowImpl->mbFrame )
+        mpWindowImpl->mpFrame->SetParent( pNewParent->mpWindowImpl->mpFrame );
+
+    bool bVisible = IsVisible();
+    Show( false, ShowFlags::NoFocusChange );
+
+    // check if the overlap window changes
+    vcl::Window* pOldOverlapWindow;
+    vcl::Window* pNewOverlapWindow = nullptr;
+    if ( ImplIsOverlapWindow() )
+        pOldOverlapWindow = nullptr;
+    else
+    {
+        pNewOverlapWindow = pNewParent->ImplGetFirstOverlapWindow();
+        if ( mpWindowImpl->mpOverlapWindow.get() != pNewOverlapWindow )
+            pOldOverlapWindow = mpWindowImpl->mpOverlapWindow;
+        else
+            pOldOverlapWindow = nullptr;
+    }
+
+    // convert windows in the hierarchy
+    bool bFocusOverlapWin = HasChildPathFocus( true );
+    bool bFocusWin = HasChildPathFocus();
+    bool bNewFrame = pNewParent->mpWindowImpl->mpFrameWindow != mpWindowImpl->mpFrameWindow;
+    if ( bNewFrame )
+    {
+        if ( mpWindowImpl->mpFrameData->mpFocusWin )
+        {
+            if ( IsWindowOrChild( mpWindowImpl->mpFrameData->mpFocusWin ) )
+                mpWindowImpl->mpFrameData->mpFocusWin = nullptr;
+        }
+        if ( mpWindowImpl->mpFrameData->mpMouseMoveWin )
+        {
+            if ( IsWindowOrChild( mpWindowImpl->mpFrameData->mpMouseMoveWin ) )
+                mpWindowImpl->mpFrameData->mpMouseMoveWin = nullptr;
+        }
+        if ( mpWindowImpl->mpFrameData->mpMouseDownWin )
+        {
+            if ( IsWindowOrChild( mpWindowImpl->mpFrameData->mpMouseDownWin ) )
+                mpWindowImpl->mpFrameData->mpMouseDownWin = nullptr;
+        }
+    }
+    ImplRemoveWindow( bNewFrame );
+    ImplInsertWindow( pNewParent );
+    if ( mpWindowImpl->mnParentClipMode & ParentClipMode::Clip )
+        pNewParent->mpWindowImpl->mbClipChildren = true;
+    ImplUpdateWindowPtr();
+    if ( ImplUpdatePos() )
+        ImplUpdateSysObjPos();
+
+    // If the Overlap-Window has changed, we need to test whether
+    // OverlapWindows that had the Child window as their parent
+    // need to be put into the window hierarchy.
+    if ( ImplIsOverlapWindow() )
+    {
+        if ( bNewFrame )
+        {
+            vcl::Window* pOverlapWindow = mpWindowImpl->mpFirstOverlap;
+            while ( pOverlapWindow )
+            {
+                vcl::Window* pNextOverlapWindow = pOverlapWindow->mpWindowImpl->mpNext;
+                pOverlapWindow->ImplUpdateOverlapWindowPtr( bNewFrame );
+                pOverlapWindow = pNextOverlapWindow;
+            }
+        }
+    }
+    else if ( pOldOverlapWindow )
+    {
+        // reset Focus-Save
+        if ( bFocusWin ||
+             (pOldOverlapWindow->mpWindowImpl->mpLastFocusWindow &&
+              IsWindowOrChild( pOldOverlapWindow->mpWindowImpl->mpLastFocusWindow )) )
+            pOldOverlapWindow->mpWindowImpl->mpLastFocusWindow = nullptr;
+
+        vcl::Window* pOverlapWindow = pOldOverlapWindow->mpWindowImpl->mpFirstOverlap;
+        while ( pOverlapWindow )
+        {
+            vcl::Window* pNextOverlapWindow = pOverlapWindow->mpWindowImpl->mpNext;
+            if ( ImplIsRealParentPath( pOverlapWindow->ImplGetWindow() ) )
+                pOverlapWindow->ImplUpdateOverlapWindowPtr( bNewFrame );
+            pOverlapWindow = pNextOverlapWindow;
+        }
+
+        // update activate-status at next overlap window
+        if ( HasChildPathFocus( true ) )
+            ImplCallFocusChangeActivate( pNewOverlapWindow, pOldOverlapWindow );
+    }
+
+    // also convert Activate-Status
+    if ( bNewFrame )
+    {
+        if ( (GetType() == WindowType::BORDERWINDOW) &&
+             (ImplGetWindow()->GetType() == WindowType::FLOATINGWINDOW) )
+            static_cast<ImplBorderWindow*>(this)->SetDisplayActive( mpWindowImpl->mpFrameData->mbHasFocus );
+    }
+
+    // when required give focus to new frame if
+    // FocusWindow is changed with SetParent()
+    if ( bFocusOverlapWin )
+    {
+        mpWindowImpl->mpFrameData->mpFocusWin = Application::GetFocusWindow();
+        if ( !mpWindowImpl->mpFrameData->mbHasFocus )
+        {
+            mpWindowImpl->mpFrame->ToTop( SalFrameToTop::NONE );
+        }
+    }
+
+    // Assure DragSource and DropTarget members are created
+    if ( bNewFrame )
+    {
+            GetDropTarget();
+    }
+
+    if( bChangeTaskPaneList )
+        pNewSysWin->GetTaskPaneList()->AddWindow( this );
+
+    if( (GetStyle() & WB_OWNERDRAWDECORATION) && mpWindowImpl->mbFrame )
+        ImplGetOwnerDrawList().emplace_back(this );
+
+    if ( bVisible )
+        Show( true, ShowFlags::NoFocusChange | ShowFlags::NoActivate );
+}
+
+bool Window::IsAncestorOf( const vcl::Window& rWindow ) const
+{
+    return ImplIsRealParentPath(&rWindow);
+}
+
+sal_uInt16 Window::GetChildCount() const
+{
+    if (!mpWindowImpl)
+        return 0;
+
+    sal_uInt16  nChildCount = 0;
+    vcl::Window* pChild = mpWindowImpl->mpFirstChild;
+    while ( pChild )
+    {
+        nChildCount++;
+        pChild = pChild->mpWindowImpl->mpNext;
+    }
+
+    return nChildCount;
+}
+
+vcl::Window* Window::GetChild( sal_uInt16 nChild ) const
+{
+    if (!mpWindowImpl)
+        return nullptr;
+
+    sal_uInt16  nChildCount = 0;
+    vcl::Window* pChild = mpWindowImpl->mpFirstChild;
+    while ( pChild )
+    {
+        if ( nChild == nChildCount )
+            return pChild;
+        pChild = pChild->mpWindowImpl->mpNext;
+        nChildCount++;
+    }
+
+    return nullptr;
+}
+
+vcl::Window* Window::GetWindow( GetWindowType nType ) const
+{
+    if (!mpWindowImpl)
+        return nullptr;
+
+    switch ( nType )
+    {
+        case GetWindowType::Parent:
+            return mpWindowImpl->mpRealParent;
+
+        case GetWindowType::FirstChild:
+            return mpWindowImpl->mpFirstChild;
+
+        case GetWindowType::LastChild:
+            return mpWindowImpl->mpLastChild;
+
+        case GetWindowType::Prev:
+            return mpWindowImpl->mpPrev;
+
+        case GetWindowType::Next:
+            return mpWindowImpl->mpNext;
+
+        case GetWindowType::FirstOverlap:
+            return mpWindowImpl->mpFirstOverlap;
+
+        case GetWindowType::Overlap:
+            if ( ImplIsOverlapWindow() )
+                return const_cast<vcl::Window*>(this);
+            else
+                return mpWindowImpl->mpOverlapWindow;
+
+        case GetWindowType::ParentOverlap:
+            if ( ImplIsOverlapWindow() )
+                return mpWindowImpl->mpOverlapWindow;
+            else
+                return mpWindowImpl->mpOverlapWindow->mpWindowImpl->mpOverlapWindow;
+
+        case GetWindowType::Client:
+            return this->ImplGetWindow();
+
+        case GetWindowType::RealParent:
+            return ImplGetParent();
+
+        case GetWindowType::Frame:
+            return mpWindowImpl->mpFrameWindow;
+
+        case GetWindowType::Border:
+            if ( mpWindowImpl->mpBorderWindow )
+                return mpWindowImpl->mpBorderWindow->GetWindow( GetWindowType::Border );
+            return const_cast<vcl::Window*>(this);
+
+        case GetWindowType::FirstTopWindowChild:
+            return ImplGetWinData()->maTopWindowChildren.empty() ? nullptr : (*ImplGetWinData()->maTopWindowChildren.begin()).get();
+
+        case GetWindowType::NextTopWindowSibling:
+        {
+            if ( !mpWindowImpl->mpRealParent )
+                return nullptr;
+            const ::std::list< VclPtr<vcl::Window> >& rTopWindows( mpWindowImpl->mpRealParent->ImplGetWinData()->maTopWindowChildren );
+            ::std::list< VclPtr<vcl::Window> >::const_iterator myPos =
+                ::std::find( rTopWindows.begin(), rTopWindows.end(), this );
+            if ( ( myPos == rTopWindows.end() ) || ( ++myPos == rTopWindows.end() ) )
+                return nullptr;
+            return *myPos;
+        }
+
+    }
+
+    return nullptr;
+}
+
+bool Window::IsChild( const vcl::Window* pWindow ) const
+{
+    do
+    {
+        if ( pWindow->ImplIsOverlapWindow() )
+            break;
+
+        pWindow = pWindow->ImplGetParent();
+
+        if ( pWindow == this )
+            return true;
+    }
+    while ( pWindow );
+
+    return false;
+}
+
+bool Window::IsWindowOrChild( const vcl::Window* pWindow, bool bSystemWindow ) const
+{
+
+    if ( this == pWindow )
+        return true;
+    return ImplIsChild( pWindow, bSystemWindow );
+}
+
+void Window::ImplSetFrameParent( const vcl::Window* pParent )
+{
+    vcl::Window* pFrameWindow = ImplGetSVData()->maFrameData.mpFirstFrame;
+    while( pFrameWindow )
+    {
+        // search all frames that are children of this window
+        // and reparent them
+        if( ImplIsRealParentPath( pFrameWindow ) )
+        {
+            SAL_WARN_IF( mpWindowImpl->mpFrame == pFrameWindow->mpWindowImpl->mpFrame, "vcl", "SetFrameParent to own" );
+            SAL_WARN_IF( !mpWindowImpl->mpFrame, "vcl", "no frame" );
+            SalFrame* pParentFrame = pParent ? pParent->mpWindowImpl->mpFrame : nullptr;
+            pFrameWindow->mpWindowImpl->mpFrame->SetParent( pParentFrame );
+        }
+        pFrameWindow = pFrameWindow->mpWindowImpl->mpFrameData->mpNextFrame;
+    }
+}
+
+} /* namespace vcl */
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */