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Fix a pair of screen-resizing issues in TUI 

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().
This commit is contained in:
Patrick Palka 2015-02-10 18:45:10 -05:00
parent d908067812
commit fc6b1256ee
3 changed files with 15 additions and 0 deletions
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7
gdb/ChangeLog
View File

@ -1,3 +1,10 @@
2015-02-11 Patrick Palka <patrick@parcs.ath.cx>
* 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().
2015-02-11 Patrick Palka <patrick@parcs.ath.cx>
* tui/tui-io.c (tui_getc): Move cursor to the end of the command

1
gdb/tui/tui-io.c
View File

@ -743,6 +743,7 @@ tui_handle_resize_during_io (int original_ch, int for_completion)
{
tui_resize_all ();
tui_refresh_all_win ();
tui_update_gdb_sizes ();
tui_set_win_resized_to (FALSE);
if (!for_completion)
{

7
gdb/tui/tui.c
View File

@ -492,6 +492,13 @@ 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. */