From 8281a16efc76197f7b0b2a385dffb44fce66d33e Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Thu, 20 Apr 2023 18:07:57 +0100
Subject: patch 9.0.1472: ":drop fname" may change the last used tab page

Problem:    ":drop fname" may change the last used tab page.
Solution:   Restore the last used tab page when :drop has changed it.
            (closes #12087)
---
 src/arglist.c                |  6 ++++++
 src/testdir/test_tabpage.vim | 16 ++++++++++++++++
 src/version.c                |  2 ++
 3 files changed, 24 insertions(+)

(limited to 'src')

diff --git a/src/arglist.c b/src/arglist.c
index bb31c45e9..a63f6c72f 100644
--- a/src/arglist.c
+++ b/src/arglist.c
@@ -1240,6 +1240,8 @@ do_arg_all(
     need_mouse_correct = TRUE;
 #endif
 
+    tabpage_T *new_lu_tp = curtab;
+
     // Try closing all windows that are not in the argument list.
     // Also close windows that are not full width;
     // When 'hidden' or "forceit" set the buffer becomes hidden.
@@ -1247,6 +1249,10 @@ do_arg_all(
     // When the ":tab" modifier was used do this for all tab pages.
     arg_all_close_unused_windows(&aall);
 
+    // Now set the last used tabpage to where we started.
+    if (valid_tabpage(new_lu_tp))
+	lastused_tabpage = new_lu_tp;
+
     // Open a window for files in the argument list that don't have one.
     // ARGCOUNT may change while doing this, because of autocommands.
     if (count > aall.opened_len || count <= 0)
diff --git a/src/testdir/test_tabpage.vim b/src/testdir/test_tabpage.vim
index 83d6123cd..eed26f722 100644
--- a/src/testdir/test_tabpage.vim
+++ b/src/testdir/test_tabpage.vim
@@ -150,6 +150,22 @@ function Test_tabpage()
   tabonly!
 endfunc
 
+func Test_tabpage_drop()
+  edit f1
+  tab split f2
+  tab split f3
+  normal! gt
+  call assert_equal(1, tabpagenr())
+
+  tab drop f3
+  call assert_equal(3, tabpagenr())
+  call assert_equal(1, tabpagenr('#'))
+  bwipe!
+  bwipe!
+  bwipe!
+  call assert_equal(1, tabpagenr('$'))
+endfunc
+
 " Test autocommands
 function Test_tabpage_with_autocmd()
   command -nargs=1 -bar C :call add(s:li, '=== ' . <q-args> . ' ===')|<args>
diff --git a/src/version.c b/src/version.c
index 99d1aecf6..611bd82ab 100644
--- a/src/version.c
+++ b/src/version.c
@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1472,
 /**/
     1471,
 /**/
-- 
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