[PATCH] [gdb/tui] Fix secondary prompt

[Tom de Vries <tdevries@suse.de>]

With CLI, a session defining a command looks like:
...
(gdb) define foo
Type commands for definition of "foo".
End with a line saying just "end".
>bar
>end
(gdb)
...

With TUI however, we get the same secondary prompts, and type the same, but
are left with:
...
(gdb) define foo
Type commands for definition of "foo".
End with a line saying just "end".
(gdb)
...

Fix this by calling tui_inject_newline_into_command_window in
gdb_readline_wrapper_line, as is done in tui_command_line_handler.

Tested on x86_64-linux.

PR tui/30636
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=30636
---
 gdb/testsuite/gdb.tui/secondary-prompt.exp | 38 ++++++++++++++++++++++
 gdb/top.c                                  |  6 ++++
 2 files changed, 44 insertions(+)
 create mode 100644 gdb/testsuite/gdb.tui/secondary-prompt.exp

diff --git a/gdb/testsuite/gdb.tui/secondary-prompt.exp b/gdb/testsuite/gdb.tui/secondary-prompt.exp
new file mode 100644
index 00000000000..99fedaa3e47
--- /dev/null
+++ b/gdb/testsuite/gdb.tui/secondary-prompt.exp
@@ -0,0 +1,38 @@
+# Copyright 2023 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+require allow_tui_tests
+
+tuiterm_env
+
+Term::clean_restart 24 80
+
+if {![Term::enter_tui]} {
+    unsupported "TUI not supported"
+    return
+}
+
+# Define a macro.
+send_gdb "define foo\n"
+send_gdb "bar\n"
+send_gdb "end\n"
+
+# Wait for the last secondary prompt to appear, followed by the gdb prompt.
+Term::wait_for ">end"
+
+# Regression test for PR tui/30636.  Make sure the secondary prompts are not
+# overwritten.
+Term::check_region_contents "secondary prompt not overwritten" 0 19 80 2 \
+    "^>bar *\r\n>end *$"
diff --git a/gdb/top.c b/gdb/top.c
index 90ddc5f5ea7..2322e55f1db 100644
--- a/gdb/top.c
+++ b/gdb/top.c
@@ -77,6 +77,7 @@
 
 #if defined(TUI)
 # include "tui/tui.h"
+# include "tui/tui-io.h"
 #endif
 
 #ifndef O_NOCTTY
@@ -958,6 +959,11 @@ gdb_readline_wrapper_line (gdb::unique_xmalloc_ptr<char> &&line)
   saved_after_char_processing_hook = after_char_processing_hook;
   after_char_processing_hook = NULL;
 
+#if defined(TUI)
+  if (tui_active)
+    tui_inject_newline_into_command_window ();
+#endif
+
   /* Prevent parts of the prompt from being redisplayed if annotations
      are enabled, and readline's state getting out of sync.  We'll
      reinstall the callback handler, which puts the terminal in raw

base-commit: 9d9f26d8b1a15561af02370f15be0af0d56ac5fa
-- 
2.35.3