tdf#93352 Fix horizontal swiping and scrolling when using an RTL UI

Starting with commit bfa21ce5fa08f2c634ccb6162914be55aef9f3c2,
horizontal swiping in Calc moved in the wrong direction scrollbars
were drawn mirrored.

So, revert parts of commit bfa21ce5fa08f2c634ccb6162914be55aef9f3c2
so that we are using Calc's previous "negative scrollbar range"
implementation for RTL UIs, but only for horizontal scrollbars since
vertical scrollbars are the same in LTR and RTL UIs.

Also, always disable RTL for scrollbars. Enabling RTL causes the
following bugs when clicking or dragging the mouse in scrollbars in
Calc's RTL UI:
- Click or drag events get mirrored so you must click or drag in
  unexpected locations to move the scrollbar thumb in the desired
  direction
- Repeatedly dragging the scrollbar thumb leftward can only move
  no highter than the R, S, or T columns

Note: even though RTL is always disabled for Calc scrollbars, the arrows
must still be swapped in vcl's ScrollBar class.

Change-Id: I85aac94ffaf7df2eeb251a3ff150cc0363b5d770
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/164959
Reviewed-by: Stéphane Guillou <stephane.guillou@libreoffice.org>
Tested-by: Jenkins
Reviewed-by: Patrick Luby <guibomacdev@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/sc/source/ui/inc/tabview.hxx b/sc/source/ui/inc/tabview.hxx
index 2bf71e00eea1..1873a525e9dd 100644
--- a/sc/source/ui/inc/tabview.hxx
+++ b/sc/source/ui/inc/tabview.hxx
@@ -242,7 +242,7 @@ private:
     void            UpdateVarZoom();
 
     static void     SetScrollBar( ScrollAdaptor& rScroll, tools::Long nRangeMax, tools::Long nVisible, tools::Long nPos, bool bLayoutRTL );
-    static tools::Long     GetScrollBarPos( const ScrollAdaptor& rScroll );
+    static tools::Long     GetScrollBarPos( const ScrollAdaptor& rScroll, bool bLayoutRTL );
 
     void            GetAreaMoveEndPosition(SCCOL nMovX, SCROW nMovY, ScFollowMode eMode,
                                            SCCOL& rAreaX, SCROW& rAreaY, ScFollowMode& rMode,