Commit: patch 9.2.0340: pum_redraw() may cause flicker

[Christian Brabandt]

patch 9.2.0340: pum_redraw() may cause flicker

Commit: https://github.com/vim/vim/commit/efedcd1e6f369e1dcc92ae0cc2c4c8020f08738e
Author: Yasuhiro Matsumoto <matt...@gmail.com>
Date: Sun Apr 12 16:24:09 2026 +0000

patch 9.2.0340: pum_redraw() may cause flicker

Problem: pum_redraw() may cause flicker
Solution: Wrap pum_redraw() in synchronized output to avoid flicker
(Yasuhiro Matsumoto)

closes: #19955

Signed-off-by: Yasuhiro Matsumoto <matt...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/src/popupmenu.c b/src/popupmenu.c
index 2ee720087..a50faaa05 100644
--- a/src/popupmenu.c
+++ b/src/popupmenu.c
@@ -953,6 +953,10 @@ pum_redraw(void)
// Use current window for highlight overrides when using 'winhighlight'
override_success = push_highlight_overrides(curwin->w_hl, curwin->w_hl_len);

+ // Batch the underlying screen update and the pum drawing into a single
+ // synchronized output frame to avoid flicker.
+ term_set_sync_output(TERM_SYNC_OUTPUT_ENABLE);
+
hlf_T hlfsNorm[3];
hlf_T hlfsSel[3];
// "word"/"abbr"
@@ -1187,6 +1191,8 @@ pum_redraw(void)

if (override_success)
pop_highlight_overrides();
+
+ term_set_sync_output(TERM_SYNC_OUTPUT_DISABLE);
}

#if defined(FEAT_PROP_POPUP) && defined(FEAT_QUICKFIX)
diff --git a/src/version.c b/src/version.c
index fc4876381..560233faf 100644
--- a/src/version.c
+++ b/src/version.c
@@ -734,6 +734,8 @@ static char *(features[]) =

static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 340,
/**/
339,
/**/