sc lok: tdf#94605 introduce uno:CellCursor

This allows the client to rerequest the current cursor position,
which is necessary e.g. on zoom-level changes.

Conflicts:
	desktop/source/lib/init.cxx
	sc/inc/docuno.hxx

(cherry picked from commit 2bcaffd12263e8f3c2a2fbf8ccc4b9bba2642146)

Conflicts:
	sc/inc/docuno.hxx

Change-Id: I10d81e220a56a36e2ec0c59005cd1d4f134857d5

4 files changed, 63 insertions, 5 deletions

diff --git a/sc/inc/docuno.hxx b/sc/inc/docuno.hxx
index 58363d64231f..b384eded2926 100644
--- a/sc/inc/docuno.hxx
+++ b/sc/inc/docuno.hxx
@@ -424,6 +424,12 @@ public:
 
     /// @see vcl::ITiledRenderable::getRowColumnHeaders().
     virtual OUString getRowColumnHeaders(const Rectangle& rRectangle) SAL_OVERRIDE;
+
+    /// @see vcl::ITiledRenderable::getCellCursor().
+    virtual OString getCellCursor( int nOutputWidth,
+                                   int nOutputHeight,
+                                   long nTileWidth,
+                                   long nTileHeight ) SAL_OVERRIDE;
 };
 
 class ScDrawPagesObj : public cppu::WeakImplHelper2<
diff --git a/sc/source/ui/inc/gridwin.hxx b/sc/source/ui/inc/gridwin.hxx
index 5d5a42511f86..b040e928c701 100644
--- a/sc/source/ui/inc/gridwin.hxx
+++ b/sc/source/ui/inc/gridwin.hxx
@@ -300,6 +300,7 @@ class ScGridWindow : public vcl::Window, public DropTargetHelper, public DragSou
 
     void            GetSelectionRects( ::std::vector< Rectangle >& rPixelRects );
 
+
     void            updateLibreOfficeKitCellCursor();
 protected:
     virtual void    PrePaint(vcl::RenderContext& rRenderContext) SAL_OVERRIDE;
@@ -444,6 +445,14 @@ public:
     void            UpdateShrinkOverlay();
     void            UpdateAllOverlays();
 
+    /// @see ScModelObj::getCellCursor().
+    OString         getCellCursor(const Fraction& rZoomX,
+                                  const Fraction& rZoomY);
+    OString         getCellCursor(int nOutputWidth,
+                                  int nOutputHeight,
+                                  long nTileWidth,
+                                  long nTileHeight);
+
 protected:
     // #114409#
     void ImpCreateOverlayObjects();
diff --git a/sc/source/ui/unoobj/docuno.cxx b/sc/source/ui/unoobj/docuno.cxx
index c84b13c4f58e..c216b36bbce8 100644
--- a/sc/source/ui/unoobj/docuno.cxx
+++ b/sc/source/ui/unoobj/docuno.cxx
@@ -868,6 +868,23 @@ OUString ScModelObj::getRowColumnHeaders(const Rectangle& rRectangle)
     return pTabView->getRowColumnHeaders(rRectangle);
 }
 
+OString ScModelObj::getCellCursor( int nOutputWidth, int nOutputHeight,
+                                   long nTileWidth, long nTileHeight )
+{
+    SolarMutexGuard aGuard;
+
+    ScViewData* pViewData = ScDocShell::GetViewData();
+
+    if (!pViewData)
+        return OString();
+
+    ScGridWindow* pGridWindow = pViewData->GetActiveWin();
+    if (!pGridWindow)
+        return OString();
+
+    return "{ \"commandName\": \".uno:CellCursor\", \"commandValues\": \"" + pGridWindow->getCellCursor( nOutputWidth, nOutputHeight, nTileWidth, nTileHeight ) + "\" }";
+}
+
 void ScModelObj::initializeForTiledRendering()
 {
     SolarMutexGuard aGuard;
diff --git a/sc/source/ui/view/gridwin.cxx b/sc/source/ui/view/gridwin.cxx
index ab76dae5dcdc..079653b4df18 100644
--- a/sc/source/ui/view/gridwin.cxx
+++ b/sc/source/ui/view/gridwin.cxx
@@ -5784,19 +5784,36 @@ bool ScGridWindow::InsideVisibleRange( SCCOL nPosX, SCROW nPosY )
     return maVisibleRange.isInside(nPosX, nPosY);
 }
 
-void ScGridWindow::updateLibreOfficeKitCellCursor() {
+// Use the same zoom calculations as in paintTile - this
+// means the client can ensure they can get the correct
+// cursor corresponding to their current tile sizings.
+OString ScGridWindow::getCellCursor( int nOutputWidth, int nOutputHeight,
+                                     long nTileWidth, long nTileHeight )
+{
+    Fraction zoomX = Fraction(long(nOutputWidth * TWIPS_PER_PIXEL), nTileWidth);
+    Fraction zoomY = Fraction(long(nOutputHeight * TWIPS_PER_PIXEL), nTileHeight);
+    return getCellCursor(zoomX, zoomY);
+}
+
+OString ScGridWindow::getCellCursor(const Fraction& rZoomX, const Fraction& rZoomY) {
     ScDocument* pDoc = pViewData->GetDocument();
     ScDrawLayer* pDrawLayer = pDoc->GetDrawLayer();
 
-    if (!pDrawLayer->isTiledRendering())
-        return;
+    // GridWindows stores a shown cell cursor in mpOOCursors, hence
+    // we can use that to determine whether we would want to be showing
+    // one (client-side) for tiled rendering too.
+    if (!pDrawLayer->isTiledRendering() || !mpOOCursors.get())
+    {
+        return OString("EMPTY");
+    }
 
     SCCOL nX = pViewData->GetCurX();
     SCROW nY = pViewData->GetCurY();
 
     Fraction defaultZoomX = pViewData->GetZoomX();
     Fraction defaultZoomY = pViewData->GetZoomX();
-    pViewData->SetZoom(mTiledZoomX, mTiledZoomY, true);
+
+    pViewData->SetZoom(rZoomX, rZoomY, true);
 
     Point aScrPos = pViewData->GetScrPos( nX, nY, eWhich, true );
     long nSizeXPix;
@@ -5810,7 +5827,15 @@ void ScGridWindow::updateLibreOfficeKitCellCursor() {
 
     pViewData->SetZoom(defaultZoomX, defaultZoomY, true);
 
-    pDrawLayer->libreOfficeKitCallback(LOK_CALLBACK_CELL_CURSOR, aRect.toString().getStr());
+    return aRect.toString();
+}
+
+void ScGridWindow::updateLibreOfficeKitCellCursor()
+{
+    ScDocument* pDoc = pViewData->GetDocument();
+    ScDrawLayer* pDrawLayer = pDoc->GetDrawLayer();
+    OString aCursor = getCellCursor(mTiledZoomX, mTiledZoomY);
+    pDrawLayer->libreOfficeKitCallback(LOK_CALLBACK_CELL_CURSOR, aCursor.getStr());
 }
 
 // #114409#
@@ -6099,6 +6124,7 @@ void ScGridWindow::UpdateCursorOverlay()
     if ( !aPixelRects.empty() )
     {
         if (pDrawLayer->isTiledRendering()) {
+            mpOOCursors.reset(new sdr::overlay::OverlayObjectList);
             updateLibreOfficeKitCellCursor();
         }
         else