commit ded59139fde2ba509abbe97f2f23b54080ed59f2
author William Bresler <wbresler@gmail.com> Tue Oct 08 21:30:48 2024 +0200
committer Christian Brabandt <cb@256bit.org> Tue Oct 08 21:42:46 2024 +0200
tree e7e21757511b33638459413184b97daf89238f23
parent 830a802f9176ad38f115c18015987a871c99f3a4

patch 9.1.0768: MS-Windows: incorrect cursor position when restoring screen

Problem:  MS-Windows: incorrect cursor position when restoring screen
          (after v9.1.0664)
Solution: Restore the VTP command for switching screens back to
          termcap_mode_end() (William Bresler)

Patch 9.1.0664 moved the VTP command for switching back to the main
screen buffer from termcap_mode_end() to mch_exit_c().  However, the
saved cursor position from the main screen continued to be restored
in termcap_mode_end().  This failed if the cursor position was beyond
the console window height, since the alternate screen buffer is always
the same size as the console window.

This patch restores the VTP command for switching back to the main
screen buffer to termcap_mode_end().  In order to preserve the effect
of patch 9.1.0664, the VTP command for switching back to the main
screen buffer in mch_exit_c() is issued only if termcap mode was not
active while exiting Vim.

See issue 15775 for a fuller description, with screen shots of the
problem.

fixes: #15775
closes: #15829

Signed-off-by: William Bresler <wbresler@gmail.com>
Signed-off-by: Ken Takata <kentkt@csc.jp>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/os_win32.c

diff --git a/src/os_win32.c b/src/os_win32.c
index e5351b1..81a3140 100644
--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -3556,13 +3556,16 @@
     static void
 mch_exit_c(int r)
 {
+    // Copy flag since stoptermcap() will clear the flag.
+    int fTermcapMode = g_fTermcapMode;
+
     exiting = TRUE;
 
     vtp_exit();
 
     stoptermcap();
-    // Switch back to main screen buffer.
-    if (use_alternate_screen_buffer)
+    // Switch back to main screen buffer if TermcapMode was not active.
+    if (!fTermcapMode &&  use_alternate_screen_buffer)
 	vtp_printf("\033[?1049l");
 
     if (g_fWindInitCalled)
@@ -6338,6 +6341,10 @@
     RestoreConsoleBuffer(cb, p_rs);
     restore_console_color_rgb();
 
+    // Switch back to main screen buffer.
+    if (exiting && use_alternate_screen_buffer)
+        vtp_printf("\033[?1049l");
+
     if (!USE_WT && (p_rs || exiting))
     {
 	/*

src/version.c

diff --git a/src/version.c b/src/version.c
index 854865f..bff689e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    768,
+/**/
     767,
 /**/
     766,