From d4110e06952be7d06ba39cf0434626bbd7301a9d Mon Sep 17 00:00:00 2001
From: Sean Dewar <6256228+seandewar@users.noreply.github.com>
Date: Sun, 11 May 2025 13:45:21 +0200
Subject: [PATCH] patch 9.1.1380: 'eventignorewin' only checked for current
 buffer

Problem:  When an autocommand executes for a non-current buffer,
          'eventignorewin' is only checked from the buffer's last
          wininfo (overwrites win_ignore in the loop), not from the
          value of 'eventignorewin' in all windows showing the buffer as
          described (after v9.1.1084)

Solution: Fix the check and don't use wininfo, as that may only contain
          windows that recently showed the buffer. Consider all the
          buffer's windows in all tabpages (Sean Dewar).

closes: #17294

Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
---
 src/autocmd.c                | 18 ++++++---
 src/testdir/test_autocmd.vim | 76 ++++++++++++++++++++++++++++++++++++
 src/version.c                |  2 +
 3 files changed, 91 insertions(+), 5 deletions(-)

diff --git a/src/autocmd.c b/src/autocmd.c
index 6ee6c11afc..3d21a937bc 100644
--- a/src/autocmd.c
+++ b/src/autocmd.c
@@ -2135,16 +2135,24 @@ apply_autocmds_group(
     if (event_ignored(event, p_ei))
 	goto BYPASS_AU;
 
-    wininfo_T *wip;
     int win_ignore = FALSE;
     // If event is allowed in 'eventignorewin', check if curwin or all windows
     // into "buf" are ignoring the event.
     if (buf == curbuf && event_tab[event].key <= 0)
 	win_ignore = event_ignored(event, curwin->w_p_eiw);
-    else if (buf != NULL && event_tab[event].key <= 0)
-	FOR_ALL_BUF_WININFO(buf, wip)
-	    if (wip->wi_win != NULL && wip->wi_win->w_buffer == buf)
-		win_ignore = event_ignored(event, wip->wi_win->w_p_eiw);
+    else if (buf != NULL && event_tab[event].key <= 0 && buf->b_nwindows > 0)
+    {
+	tabpage_T *tp;
+	win_T *wp;
+
+	win_ignore = TRUE;
+	FOR_ALL_TAB_WINDOWS(tp, wp)
+	    if (wp->w_buffer == buf && !event_ignored(event, wp->w_p_eiw))
+	    {
+		win_ignore = FALSE;
+		break;
+	    }
+    }
     if (win_ignore)
 	goto BYPASS_AU;
 
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index 192c436bef..db5558304d 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -5314,4 +5314,80 @@ func Test_autocmd_tabclosedpre()
   bw!
 endfunc
 
+func Test_eventignorewin_non_current()
+  defer CleanUpTestAuGroup()
+  let s:triggered = ''
+  augroup testing
+    " Will set <abuf> to the buffer of the closing window.
+    autocmd WinClosed * let s:triggered = 'WinClosed'
+  augroup END
+  let initial_win = win_getid()
+
+  new
+  let new_buf = bufnr()
+  " Only set for one of the windows into the new buffer.
+  setlocal eventignorewin=all
+  split
+  setlocal eventignorewin=
+  let close_winnr = winnr()
+
+  " Return to the window where the buffer is non-current. WinClosed should
+  " trigger as not all windows into new_buf have 'eventignorewin' set for it.
+  call win_gotoid(initial_win)
+  call assert_notequal(new_buf, bufnr())
+  execute close_winnr 'close'
+  call assert_equal('WinClosed', s:triggered)
+
+  wincmd w
+  call assert_equal(new_buf, bufnr())
+  tab split
+  setlocal eventignorewin=
+  let close_winnr = win_getid()
+
+  " Ensure that new_buf's window in the other tabpage with 'eventignorewin'
+  " unset allows WinClosed to run when new_buf is non-current.
+  call win_gotoid(initial_win)
+  call assert_notequal(new_buf, bufnr())
+  let s:triggered = ''
+  only!
+  call assert_equal('WinClosed', s:triggered)
+  call assert_equal(1, win_findbuf(new_buf)->len())
+
+  " Create an only window to new_buf with 'eventignorewin' set.
+  tabonly!
+  execute new_buf 'sbuffer'
+  setlocal eventignorewin=all
+  wincmd p
+  call assert_equal(1, win_findbuf(new_buf)->len())
+  call assert_notequal(new_buf, bufnr())
+
+  " Closing a window unrelated to new_buf should not block WinClosed.
+  split
+  let s:triggered = ''
+  close
+  call assert_equal('WinClosed', s:triggered)
+  call assert_equal(1, win_findbuf(new_buf)->len())
+
+  " Check WinClosed is blocked when we close the only window to new_buf (that
+  " has 'eventignorewin' set) while new_buf is non-current.
+  call assert_notequal(new_buf, bufnr())
+  let s:triggered = ''
+  only!
+  call assert_equal('', s:triggered)
+  call assert_equal(0, win_findbuf(new_buf)->len())
+
+  augroup testing
+    autocmd!
+    autocmd BufNew * ++once let s:triggered = 'BufNew'
+  augroup END
+
+  " Buffer not shown in a window, 'eventignorewin' should not block (and
+  " can't even be set for it anyway in this case).
+  badd foo
+  call assert_equal('BufNew', s:triggered)
+
+  unlet! s:triggered
+  %bw!
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
index b0dc438870..aa4bc198e0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1380,
 /**/
     1379,
 /**/