(tui_initialize_readline): Allow to use space to leave SingleKey
to enter one gdb command.
(tui_enable): Restore the TUI keymap when we are back to TUI.
(tui_disable): Restore normal keymap when leaving TUI.
* tuiIO.c (tui_redisplay_readline): Restore the SingleKey mode
when the buffer becomes empty and we are in tui_one_command_mode.
(tui_command_loop): New function to override gdb loop and make sure
uiout is set according to TUI mode.
(tui_command_loop): Install the specific TUI command hook.
* tuiIO.c (tui_initialize_io): Initialize tui_old_uiout.
(tui_uiout, tui_old_uiout): Make public.
* tuiIO.h (tui_uiout, tui_old_uiout): Declare.
(printable_part): New function from readline/complete.c.
(PUTX): New macro, likewise.
(print_filename): New function, likewise.
(get_y_or_n): New function, likewise and adapted for TUI.
(tui_rl_display_match_list): New function from readline/complete.c
and writes on TUI command window.
(tui_setup_io): Install or remove the readline hook
rl_completion_display_matches_hook so that completion is written
directly in TUI command window instead of in the TUI pipe.
(tui_initialize_io): Use #ifdef TUI_USE_PIPE_FOR_READLINE for the
TUI redirection pipe.
(tui_getc): Likewise for call to tui_readline_output.
(tui_readline_output): Likewise for function.
* tui.c (tui_rl_startup_hook): Always take care of gdb prompt.
* tui.c (tui_commands): Table of single key commands.
(tui_rl_command_key): New function to execute gdb command.
(tui_rl_command_mode): New function to temporarily leave SingleKey.
(tui_rl_next_keymap): New function to enter/leave the SingleKey mode.
(tui_rl_startup_hook): New function to avoid prompt display by
readline functions.
(tui_set_key_mode): New function to set the key mode and install
the readline keymap.
(tui_initialize_readline): Create TUI SingleKey readline map.
(tui_enable): Install rl_startup_hook.
(tui_disable): Remove it.
* tui.h (enum tui_key_mode): Declare.
(tui_set_key_mode, tui_current_key_mode): Declare.
* tuiIO.c (tui_redisplay_readline): Don't display the prompt in
SingleKey mode.
* tuiIO.h (tui_redisplay_readline): Declare.
leave it in the command window.
(tui_redisplay_readline): Save cursor position to restore the
cursor after we go back from background.
* tuiData.h (TuiCommandInfo): Add start_line member.
* tuiIO.c: New management for curses and gdb terminal interactions.
(tui_tputs): Remove.
(tuiTermSetup, tuiTermUnsetup): Remove, must use normal curses ops.
(tuiBufferGetc, tui_vStartNewLines, _updateCommandInfo): Remove.
(tui_owns_terminal): Remove.
(tui_redisplay_readline): New function.
(tui_puts): New function.
(tui_prep_terminal): New function.
(tui_deprep_terminal): New function.
(tui_getc): Rename of tuiGetc, simplify and fix.
(tui_setup_io): New function.
(tui_initialize_io): New function.
