sc lok: Cell Cursor callback

This only works correctly for the default zoom level - since
the updateLibreOfficeKitCellCursor call happens during the
internal / hidden rendering, it uses the internal zoom values,
which can differ from the tiled-rendering zoom values.

Conflicts:
	include/LibreOfficeKit/LibreOfficeKitEnums.h

(cherry picked from commit 79940606)

Conflicts:
	libreofficekit/source/gtk/lokdocview.cxx
	sc/source/ui/view/gridwin.cxx

Change-Id: Ie4f344fe771078fca10ad9d6f7a93e88fb93880a

include/LibreOfficeKit/LibreOfficeKitEnums.h

@@ -195,7 +195,14 @@ typedef enum
      *     // TODO "result": "..."  // UNO Any converted to JSON (not implemented yet)
      * }
      */
-    LOK_CALLBACK_UNO_COMMAND_RESULT
+    LOK_CALLBACK_UNO_COMMAND_RESULT,
+
+    /**
+     * The size and/or the position of the cell cursor changed.
+     *
+     * Rectangle format is the same as LOK_CALLBACK_INVALIDATE_TILES.
+     */
+    LOK_CALLBACK_CELL_CURSOR
 }
 LibreOfficeKitCallbackType;
 

sc/source/ui/view/gridwin.cxx

@@ -5782,6 +5782,30 @@ bool ScGridWindow::InsideVisibleRange( SCCOL nPosX, SCROW nPosY )
     return maVisibleRange.isInside(nPosX, nPosY);
 }
 
+static void updateLibreOfficeKitCellCursor(ScViewData* pViewData, ScSplitPos eWhich) {
+    ScDocument* pDoc = pViewData->GetDocument();
+    ScDrawLayer* pDrawLayer = pDoc->GetDrawLayer();
+
+    if (!pDrawLayer->isTiledRendering())
+        return;
+
+    SCCOL nX = pViewData->GetCurX();
+    SCROW nY = pViewData->GetCurY();
+    Point aScrPos = pViewData->GetScrPos( nX, nY, eWhich, true );
+
+    long nSizeXPix;
+    long nSizeYPix;
+    pViewData->GetMergeSizePixel( nX, nY, nSizeXPix, nSizeYPix );
+
+    double fPPTX = pViewData->GetPPTX();
+    double fPPTY = pViewData->GetPPTY();
+    Rectangle aRect(Point(aScrPos.getX() / fPPTX, aScrPos.getY() / fPPTY),
+                    Size(nSizeXPix / fPPTX, nSizeYPix / fPPTY));
+
+    pDrawLayer->libreOfficeKitCallback(LOK_CALLBACK_CELL_CURSOR, aRect.toString().getStr());
+
+}
+
 // #114409#
 void ScGridWindow::CursorChanged()
 {
@@ -5789,6 +5813,8 @@ void ScGridWindow::CursorChanged()
     // now, just re-create them
 
     UpdateCursorOverlay();
+
+    updateLibreOfficeKitCellCursor(pViewData, eWhich);
 }
 
 // #114409#
@@ -5942,9 +5968,8 @@ void ScGridWindow::UpdateCursorOverlay()
 {
     ScDocument* pDoc = pViewData->GetDocument();
 
-    // never show the cell cursor when the tiled rendering is going on; either
-    // we want to show the editeng selection, or the cell selection, but not
-    // the cell cursor by itself
+    // The cursor is rendered client-side in tiled rendering -
+    // see updateLibreOfficeKitCellCursor.
     if (pDoc->GetDrawLayer()->isTiledRendering())
         return;