From: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Date: Sun, 12 Apr 2026 16:24:09 +0000 (+0000)
Subject: patch 9.2.0340: pum_redraw() may cause flicker
X-Git-Tag: v9.2.0340^0
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=efedcd1e6f369e1dcc92ae0cc2c4c8020f08738e;p=thirdparty%2Fvim.git

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 <mattn.jp@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
---

diff --git a/src/popupmenu.c b/src/popupmenu.c
index 2ee720087d..a50faaa05b 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 fc48763819..560233fafc 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,
 /**/