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[PATCH] Fix a pair of screen-resizing issues in TUI
- From: Patrick Palka <patrick at parcs dot ath dot cx>
- To: gdb-patches at sourceware dot org
- Cc: Patrick Palka <patrick at parcs dot ath dot cx>
- Date: Fri, 9 Jan 2015 22:49:18 -0500
- Subject: [PATCH] Fix a pair of screen-resizing issues in TUI
- Authentication-results: sourceware.org; auth=none
This patch fixes a pair of TUI issues related to screen resizing:
1. In tui_handle_resize_during_io(), when the TUI screen gets resized,
we fail to update GDB's idea about the height of the output window.
You can see this bug by doing:
a. Enter TUI mode.
b. "show height"
c. Resize the terminal.
d. "show height"
And observe that despite resizing the terminal, the reported height
remains unchanged. Note that a similar issue exists in the CLI.
The fix for this is simple: call tui_update_gdb_sizes() after performing
a resize, so that the "height" variable remains consistent with the
height of TUI's output window.
2. In tui_enable(), the call to tui_update_gdb_sizes() may clobber
readline's idea of the actual screen dimensions, and a subsequent
pending resize will use bogus terminal dimensions.
You can see this bug by doing:
a. Enter TUI mode.
b. Exit TUI mode.
c. Resize the terminal.
d. Enter TUI mode.
e. Press a key to resize the screen.
And observe that the terminal gets incorrectly resized to the wrong
dimensions. To fix this issue, we should oppurtunistically resize the
screen in tui_enable(). That way we eliminate the possibility of a
pending resize triggering right after we call tui_update_gdb_sizes().
gdb/ChangeLog:
* tui/tui-io.c (tui_handle_resize_during_io): Call
tui_update_gdb_sizes() after resizing the screen.
* tui/tui.c (tui_enable): Resize the terminal before
calling tui_update_gdb_sizes().
---
gdb/tui/tui-io.c | 1 +
gdb/tui/tui.c | 7 +++++++
2 files changed, 8 insertions(+)
diff --git a/gdb/tui/tui-io.c b/gdb/tui/tui-io.c
index 94c3ec2..fccada5 100644
--- a/gdb/tui/tui-io.c
+++ b/gdb/tui/tui-io.c
@@ -767,6 +767,7 @@ tui_handle_resize_during_io (void)
{
tui_resize_all ();
tui_refresh_all_win ();
+ tui_update_gdb_sizes ();
tui_set_win_resized_to (FALSE);
}
}
diff --git a/gdb/tui/tui.c b/gdb/tui/tui.c
index 00e505d..53eb6d2 100644
--- a/gdb/tui/tui.c
+++ b/gdb/tui/tui.c
@@ -483,6 +483,13 @@ tui_enable (void)
/* Restore TUI keymap. */
tui_set_key_mode (tui_current_key_mode);
+
+ /* Resize and refresh the screen. */
+ if (tui_win_resized ())
+ {
+ tui_resize_all ();
+ tui_set_win_resized_to (FALSE);
+ }
tui_refresh_all_win ();
/* Update gdb's knowledge of its terminal. */
--
2.2.1.212.gc5b9256