svx lok: avoid SfxViewShell::Current() during constructing a new view shell

Currently when a text edit is started, then in the LOK case if there is
an other view that shows the same page, then both draw views will have
an outliner view showing the text edit. This means that in case a view
shell is created after starting the text edit, that won't have an
outliner view for the text edit.

Before fixing this, calls to SfxViewShell::Current() has to be avoided
when we're in the process of setting up a new LOK view. In case of
Impress, this is a double initialization, and by the time
SdrObjEditView::ImpMakeOutlinerView() is called, we're already in the
process of setting up the second SfxViewShell (as part of
SdXImpressDocument::initializeForTiledRendering()), but
SfxViewShell::Current() still points to the old view shell.  Which means
that the outliner view would refer to a view shell that's deleted soon,
and we crash as soon as it tries to invoke a LOK callback.

Fix this by adding a virtual member function to SdrObjEditView, and
override it in sd, so in case applications want to provide a more
precise way of giving the view shell owning a draw view, then they can.

Change-Id: Ie0005f73237d4ff9cf576bf16fa5b46280f13759
Reviewed-on: https://gerrit.libreoffice.org/27561
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>

1 files changed, 13 insertions, 1 deletions

diff --git a/svx/source/svdraw/svdedxv.cxx b/svx/source/svdraw/svdedxv.cxx
index 9a4588060b71..cd6e083eac5f 100644
--- a/svx/source/svdraw/svdedxv.cxx
+++ b/svx/source/svdraw/svdedxv.cxx
@@ -142,6 +142,11 @@ void SdrObjEditView::TakeActionRect(Rectangle& rRect) const
     }
 }
 
+SfxViewShell* SdrObjEditView::GetSfxViewShell() const
+{
+    return nullptr;
+}
+
 void SdrObjEditView::Notify(SfxBroadcaster& rBC, const SfxHint& rHint)
 {
     SdrGlueEditView::Notify(rBC,rHint);
@@ -461,7 +466,14 @@ OutlinerView* SdrObjEditView::ImpMakeOutlinerView(vcl::Window* pWin, bool /*bNoP
     }
     pOutlView->SetControlWord(nStat);
     pOutlView->SetBackgroundColor( aBackground );
-    pOutlView->registerLibreOfficeKitViewCallback(SfxViewShell::Current());
+
+    // In case we're in the process of constructing a new view shell,
+    // SfxViewShell::Current() may still point to the old one. So if possible,
+    // depend on the application owning this draw view to provide the view
+    // shell.
+    SfxViewShell* pSfxViewShell = GetSfxViewShell();
+    pOutlView->registerLibreOfficeKitViewCallback(pSfxViewShell ? pSfxViewShell : SfxViewShell::Current());
+
     if (pText!=nullptr)
     {
         pOutlView->SetAnchorMode((EVAnchorMode)(pText->GetOutlinerViewAnchorMode()));