sc: implement per-view LOK_CALLBACK_CELL_FORMULA

With this, one view can edit one cell while the other view edits an
other cell within the same sheet (without a failing assert).

Change-Id: I355caea69daa17fcd4b4813d0f31ff2072f9c847
Reviewed-on: https://gerrit.libreoffice.org/26260Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>

sc/source/ui/app/inputhdl.cxx

@@ -1883,8 +1883,13 @@ void ScInputHandler::UpdateActiveView()
         ScDocShell* pDocShell = pActiveViewSh->GetViewData().GetDocShell();
         if (comphelper::LibreOfficeKit::isActive())
         {
-            ScDrawLayer *pDrawLayer = pDocShell->GetDocument().GetDrawLayer();
-            pTableView->registerLibreOfficeKitCallback(pDrawLayer);
+            if (comphelper::LibreOfficeKit::isViewCallback())
+                pTableView->registerLibreOfficeKitViewCallback(pActiveViewSh);
+            else
+            {
+                ScDrawLayer *pDrawLayer = pDocShell->GetDocument().GetDrawLayer();
+                pTableView->registerLibreOfficeKitCallback(pDrawLayer);
+            }
         }
     }
 
@@ -2294,7 +2299,15 @@ void ScInputHandler::DataChanged( bool bFromTopNotify, bool bSetModified )
         ScDocShell* pDocSh = pActiveViewSh->GetViewData().GetDocShell();
         ScDocument& rDoc = pDocSh->GetDocument();
         if ( comphelper::LibreOfficeKit::isActive() )
-            rDoc.GetDrawLayer()->libreOfficeKitCallback(LOK_CALLBACK_CELL_FORMULA, aText.toUtf8().getStr());
+        {
+            if (comphelper::LibreOfficeKit::isViewCallback())
+            {
+                if (pActiveViewSh)
+                    pActiveViewSh->libreOfficeKitViewCallback(LOK_CALLBACK_CELL_FORMULA, aText.toUtf8().getStr());
+            }
+            else
+                rDoc.GetDrawLayer()->libreOfficeKitCallback(LOK_CALLBACK_CELL_FORMULA, aText.toUtf8().getStr());
+        }
     }
 
     // If the cursor is before the end of a paragraph, parts are being pushed to

sc/source/ui/view/viewdata.cxx

@@ -947,7 +947,10 @@ void ScViewData::SetEditEngine( ScSplitPos eWhich,
 
         if (pDoc->GetDrawLayer() && comphelper::LibreOfficeKit::isActive())
         {
-            pEditView[eWhich]->registerLibreOfficeKitCallback(pDoc->GetDrawLayer());
+            if (comphelper::LibreOfficeKit::isViewCallback())
+                pEditView[eWhich]->registerLibreOfficeKitViewCallback(pViewShell);
+            else
+                pEditView[eWhich]->registerLibreOfficeKitCallback(pDoc->GetDrawLayer());
         }
     }