* [PATCH] [gdb/tui] Fix centering and highlighting of current line
@ 2024-03-28 14:33 Tom de Vries
2024-03-28 16:38 ` Pedro Alves
2024-04-01 16:13 ` Tom Tromey
0 siblings, 2 replies; 3+ messages in thread
From: Tom de Vries @ 2024-03-28 14:33 UTC (permalink / raw)
To: gdb-patches
After starting TUI like this with a hello world a.out:
...
$ gdb -q a.out -ex start -ex "tui enable"
...
we get:
...
┌─hello.c──────────────────────────────┐
│ 5 { │
│ 6 printf ("hello\n"); │
│ 7 │
│ 8 return 0; │
│ 9 } │
│ │
└──────────────────────────────────────┘
...
This is a regression since commit ee1e9bbb513 ("[gdb/tui] Fix displaying main
after resizing"), before which we had instead:
...
┌─hello.c──────────────────────────────┐
│ 4 main (void) │
│ 5 { │
│ > 6 ^[[7m printf ("hello\n");^[[0m │
│ 7 │
│ 8 return 0; │
│ 9 } │
└──────────────────────────────────────┘
...
In other words, the problems are:
- the active line (source line 6) is no longer highlighted, and
- the active line is not veritically centered (screen line 2 out 6 instead of
screen line 3 out of 6).
Fix these problems respectively by:
- in tui_enable, instead of "tui_show_frame_info (0)" using
'tui_show_frame_info (deprecated_safe_get_selected_frame ())", and
- in tui_source_window_base::rerender, adding centering functionality.
Tested on aarch64-linux.
Co-Authored-By: Tom Tromey <tromey@adacore.com>
PR tui/31522
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31522
---
gdb/testsuite/gdb.tui/main-2.exp | 47 ++++++++++++++++++++++++++++++++
gdb/tui/tui-winsource.c | 10 +++++++
gdb/tui/tui.c | 2 +-
3 files changed, 58 insertions(+), 1 deletion(-)
create mode 100644 gdb/testsuite/gdb.tui/main-2.exp
diff --git a/gdb/testsuite/gdb.tui/main-2.exp b/gdb/testsuite/gdb.tui/main-2.exp
new file mode 100644
index 00000000000..1dcb3cfc6d4
--- /dev/null
+++ b/gdb/testsuite/gdb.tui/main-2.exp
@@ -0,0 +1,47 @@
+# Copyright 2024 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/>.
+
+# Test that enabling tui while having a current frame results in
+# centering and highlighting the associated line.
+
+require allow_tui_tests
+
+tuiterm_env
+
+standard_testfile tui-layout.c
+
+if { [build_executable "failed to prepare" $testfile $srcfile ] == -1} {
+ return -1
+}
+
+Term::clean_restart 24 80 $binfile
+
+if {![runto_main]} {
+ perror "test suppressed"
+ return
+}
+
+if {![Term::enter_tui]} {
+ unsupported "TUI not supported"
+ return
+}
+
+set line " return 0;"
+set nr [gdb_get_line_number $line]
+
+set screen_line [Term::get_line_with_attrs 6]
+verbose -log "screen line 6: '$screen_line'"
+gdb_assert { [regexp "$nr <reverse:1>$line<reverse:0>" $screen_line] } \
+ "highlighted line in middle of source window"
diff --git a/gdb/tui/tui-winsource.c b/gdb/tui/tui-winsource.c
index 4dbbe922256..61c8e00589d 100644
--- a/gdb/tui/tui-winsource.c
+++ b/gdb/tui/tui-winsource.c
@@ -467,6 +467,16 @@ tui_source_window_base::rerender ()
struct symtab *s = find_pc_line_symtab (get_frame_pc (frame));
if (this != TUI_SRC_WIN)
find_line_pc (s, cursal.line, &cursal.pc);
+
+ /* This centering code is copied from tui_source_window::maybe_update.
+ It would be nice to do centering more often, and do it in just one
+ location. But since this is a regression fix, handle this
+ conservatively for now. */
+ int start_line = (cursal.line - ((height - box_size ()) / 2)) + 1;
+ if (start_line <= 0)
+ start_line = 1;
+ cursal.line = start_line;
+
update_source_window (gdbarch, cursal);
}
else
diff --git a/gdb/tui/tui.c b/gdb/tui/tui.c
index 19f09609a2f..eaee85f82b4 100644
--- a/gdb/tui/tui.c
+++ b/gdb/tui/tui.c
@@ -466,7 +466,7 @@ tui_enable (void)
tui_set_term_width_to (COLS);
def_prog_mode ();
- tui_show_frame_info (0);
+ tui_show_frame_info (deprecated_safe_get_selected_frame ());
tui_set_initial_layout ();
tui_set_win_focus_to (TUI_SRC_WIN);
keypad (TUI_CMD_WIN->handle.get (), TRUE);
base-commit: 4ef6173d2dfeafd33deedf7ce0d384cfbcf1170d
--
2.35.3
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] [gdb/tui] Fix centering and highlighting of current line
2024-03-28 14:33 [PATCH] [gdb/tui] Fix centering and highlighting of current line Tom de Vries
@ 2024-03-28 16:38 ` Pedro Alves
2024-04-01 16:13 ` Tom Tromey
1 sibling, 0 replies; 3+ messages in thread
From: Pedro Alves @ 2024-03-28 16:38 UTC (permalink / raw)
To: Tom de Vries, gdb-patches
On 2024-03-28 14:33, Tom de Vries wrote:
> Tested on aarch64-linux.
>
> Co-Authored-By: Tom Tromey <tromey@adacore.com>
>
> PR tui/31522
> Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31522
Thank you. As I said in the bug, this works for me.
Also ran the new test along all the other gdb.tui/ tests, and saw no regressions.
Tested-By: Pedro Alves <pedro@palves.net>
Pedro Alves
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] [gdb/tui] Fix centering and highlighting of current line
2024-03-28 14:33 [PATCH] [gdb/tui] Fix centering and highlighting of current line Tom de Vries
2024-03-28 16:38 ` Pedro Alves
@ 2024-04-01 16:13 ` Tom Tromey
1 sibling, 0 replies; 3+ messages in thread
From: Tom Tromey @ 2024-04-01 16:13 UTC (permalink / raw)
To: Tom de Vries; +Cc: gdb-patches
>>>>> "Tom" == Tom de Vries <tdevries@suse.de> writes:
Tom> Fix these problems respectively by:
Tom> - in tui_enable, instead of "tui_show_frame_info (0)" using
Tom> 'tui_show_frame_info (deprecated_safe_get_selected_frame ())", and
Tom> - in tui_source_window_base::rerender, adding centering functionality.
Thanks.
Approved-By: Tom Tromey <tom@tromey.com>
Tom> + /* This centering code is copied from tui_source_window::maybe_update.
Tom> + It would be nice to do centering more often, and do it in just one
Tom> + location. But since this is a regression fix, handle this
Tom> + conservatively for now. */
Yeah, unfortunately some of this code remains spaghetti from the old
days.
Tom
^ permalink raw reply [flat|nested] 3+ messages in thread
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2024-03-28 14:33 [PATCH] [gdb/tui] Fix centering and highlighting of current line Tom de Vries
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2024-04-01 16:13 ` Tom Tromey
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