From 8bfdd84ffcffe19aa6c495a0772e1a5fcb9a5124 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Caol=C3=A1n=20McNamara?= <caolanm@redhat.com>
Date: Fri, 25 Sep 2020 11:22:03 +0100
Subject: [PATCH] rhbz#1882616 move cursor one step at a time in the desired
direction
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Content-Type: text/plain; charset=UTF-8
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until we get to the target position. The break iterator operates in graphemes
so we can't just move Left/Right the amount of utf-16 we want to move.
Change-Id: I25d4e9285deae374f85dcaadbf4601bc213a89de
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/103380
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
(cherry picked from commit bf858622e543163a23db766912ea6b121f447e6d)
---
sw/source/core/edit/editsh.cxx | 40 +++++++++++++++++++++++++++++-----
1 file changed, 35 insertions(+), 5 deletions(-)
diff --git a/sw/source/core/edit/editsh.cxx b/sw/source/core/edit/editsh.cxx
index 8f84ce42ed75..872d92d7afcc 100644
--- a/sw/source/core/edit/editsh.cxx
+++ b/sw/source/core/edit/editsh.cxx
@@ -988,7 +988,8 @@ OUString SwEditShell::DeleteExtTextInput( bool bInsText )
void SwEditShell::SetExtTextInputData( const CommandExtTextInputData& rData )
{
- const SwPosition& rPos = *GetCursor()->GetPoint();
+ SwPaM* pCurrentCursor = GetCursor();
+ const SwPosition& rPos = *pCurrentCursor->GetPoint();
SwExtTextInput* pInput = GetDoc()->GetExtTextInput( rPos.nNode.GetNode() );
if( !pInput )
return;
@@ -1005,10 +1006,39 @@ void SwEditShell::SetExtTextInputData( const CommandExtTextInputData& rData )
// ugly but works
ShowCursor();
const sal_Int32 nDiff = nNewCursorPos - rPos.nContent.GetIndex();
- if( 0 > nDiff )
- Left( -nDiff, CRSR_SKIP_CHARS );
- else if( 0 < nDiff )
- Right( nDiff, CRSR_SKIP_CHARS );
+ if( nDiff != 0)
+ {
+ bool bLeft = nDiff < 0;
+ sal_Int32 nMaxGuard = std::abs(nDiff);
+ while (true)
+ {
+ auto nOldPos = pCurrentCursor->GetPoint()->nContent.GetIndex();
+ if (bLeft)
+ Left(1, CRSR_SKIP_CHARS);
+ else
+ Right(1, CRSR_SKIP_CHARS);
+ auto nNewPos = pCurrentCursor->GetPoint()->nContent.GetIndex();
+
+ // expected success
+ if (nNewPos == nNewCursorPos)
+ break;
+
+ if (nNewPos == nOldPos)
+ {
+ // if there was no movement, we have failed for some reason
+ SAL_WARN("sw.core", "IM cursor move failed");
+ break;
+ }
+
+ if (--nMaxGuard == 0)
+ {
+ // if it takes more cursor moves than there are utf-16 chars to move past
+ // something has probably gone wrong
+ SAL_WARN("sw.core", "IM abandoning cursor positioning");
+ break;
+ }
+ }
+ }
SetOverwriteCursor( rData.IsCursorOverwrite() );
--
2.29.2