tdf#141556 Fix 100% CPU usage in Writer idle loop

Do not interrupt the idle layout processing unnecessarily, because if it
is continually interrupted before making enough progress then it will
keep resuming at the same page, never finishing, constantly using CPU.

This is achieved with two changes:

- Revert "tdf#123583 use TaskStopwatch for Writer Idle loop"
(commit 383032c50a3e3354f04200ce984a47ab9d2c5c67) which
introduced a stopwatch timer to interrupt idle processing every 50ms.
This reversion restores the previous behaviour where idle processing
is interrupted only when there is an input event.

- Filter out TIMER events so that they do not interrupt the idle loop;
this fixes both tdf#123583 and tdf#141556

Conflicts:
sw/source/core/inc/layact.hxx
sw/source/core/layout/layact.cxx

Change-Id: Ic989631e5f32199209d64b66b72059253fc0167a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/113825
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/sw/source/core/view/viewsh.cxx b/sw/source/core/view/viewsh.cxx
index 4ec987fd777b..522813e4b912 100644
--- a/sw/source/core/view/viewsh.cxx
+++ b/sw/source/core/view/viewsh.cxx
@@ -284,6 +284,7 @@ void SwViewShell::ImplEndAction( const bool bIdleEnd )
         aAction.SetComplete( false );
         if ( mnLockPaint )
             aAction.SetPaint( false );
+        aAction.SetInputType( VclInputFlags::KEYBOARD );
         aAction.Action(GetWin());
     }