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/* TUI Interpreter definitions for GDB, the GNU debugger.
Copyright (C) 2003-2014 Free Software Foundation, Inc.
This file is part of GDB.
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/>. */
#include "defs.h"
#include "interps.h"
#include "top.h"
#include "event-top.h"
#include "event-loop.h"
#include "ui-out.h"
#include "cli-out.h"
#include "tui/tui-data.h"
#include "readline/readline.h"
#include "tui/tui-win.h"
#include "tui/tui.h"
#include "tui/tui-io.h"
#include "exceptions.h"
#include "infrun.h"
#include "observer.h"
static struct ui_out *tui_ui_out (struct interp *self);
/* Set to 1 when the TUI mode must be activated when we first start
gdb. */
static int tui_start_enabled = 0;
/* The TUI interpreter. */
static struct interp *tui_interp;
/* Cleanup the tui before exiting. */
static void
tui_exit (void)
{
/* Disable the tui. Curses mode is left leaving the screen in a
clean state (see endwin()). */
tui_disable ();
}
/* True if TUI is the top-level interpreter. */
static int tui_is_toplevel = 0;
/* Observers for several run control events. If the interpreter is
quiet (i.e., another interpreter is being run with
interpreter-exec), print nothing. */
/* Observer for the signal_received notification. */
static void
tui_on_signal_received (enum gdb_signal siggnal)
{
if (!interp_quiet_p (tui_interp))
print_signal_received_reason (tui_ui_out (tui_interp), siggnal);
}
/* Observer for the end_stepping_range notification. */
static void
tui_on_end_stepping_range (void)
{
if (!interp_quiet_p (tui_interp))
print_end_stepping_range_reason (tui_ui_out (tui_interp));
}
/* Observer for the signal_exited notification. */
static void
tui_on_signal_exited (enum gdb_signal siggnal)
{
if (!interp_quiet_p (tui_interp))
print_signal_exited_reason (tui_ui_out (tui_interp), siggnal);
}
/* Observer for the exited notification. */
static void
tui_on_exited (int exitstatus)
{
if (!interp_quiet_p (tui_interp))
print_exited_reason (tui_ui_out (tui_interp), exitstatus);
}
/* Observer for the no_history notification. */
static void
tui_on_no_history (void)
{
if (!interp_quiet_p (tui_interp))
print_no_history_reason (tui_ui_out (tui_interp));
}
/* These implement the TUI interpreter. */
static void *
tui_init (struct interp *self, int top_level)
{
tui_is_toplevel = top_level;
/* Install exit handler to leave the screen in a good shape. */
atexit (tui_exit);
tui_initialize_static_data ();
tui_initialize_io ();
tui_initialize_win ();
if (ui_file_isatty (gdb_stdout))
tui_initialize_readline ();
/* If changing this, remember to update cli-interp.c as well. */
observer_attach_signal_received (tui_on_signal_received);
observer_attach_end_stepping_range (tui_on_end_stepping_range);
observer_attach_signal_exited (tui_on_signal_exited);
observer_attach_exited (tui_on_exited);
observer_attach_no_history (tui_on_no_history);
return NULL;
}
/* True if enabling the TUI is allowed. Example, if the top level
interpreter is MI, enabling curses will certainly lose. */
int
tui_allowed_p (void)
{
/* Only if TUI is the top level interpreter. Also don't try to
setup curses (and print funny control characters) if we're not
outputting to a terminal. */
return tui_is_toplevel && ui_file_isatty (gdb_stdout);
}
static int
tui_resume (void *data)
{
struct ui_file *stream;
/* gdb_setup_readline will change gdb_stdout. If the TUI was
previously writing to gdb_stdout, then set it to the new
gdb_stdout afterwards. */
stream = cli_out_set_stream (tui_old_uiout, gdb_stdout);
if (stream != gdb_stdout)
{
cli_out_set_stream (tui_old_uiout, stream);
stream = NULL;
}
gdb_setup_readline ();
if (stream != NULL)
cli_out_set_stream (tui_old_uiout, gdb_stdout);
if (tui_start_enabled)
tui_enable ();
return 1;
}
static int
tui_suspend (void *data)
{
tui_start_enabled = tui_active;
tui_disable ();
return 1;
}
/* Display the prompt if we are silent. */
static int
tui_display_prompt_p (void *data)
{
if (interp_quiet_p (NULL))
return 0;
else
return 1;
}
static struct ui_out *
tui_ui_out (struct interp *self)
{
if (tui_active)
return tui_out;
else
return tui_old_uiout;
}
static struct gdb_exception
tui_exec (void *data, const char *command_str)
{
internal_error (__FILE__, __LINE__, _("tui_exec called"));
}
/* Provide a prototype to silence -Wmissing-prototypes. */
extern initialize_file_ftype _initialize_tui_interp;
void
_initialize_tui_interp (void)
{
static const struct interp_procs procs = {
tui_init,
tui_resume,
tui_suspend,
tui_exec,
tui_display_prompt_p,
tui_ui_out,
NULL,
cli_command_loop
};
/* Create a default uiout builder for the TUI. */
tui_interp = interp_new (INTERP_TUI, &procs);
interp_add (tui_interp);
if (interpreter_p && strcmp (interpreter_p, INTERP_TUI) == 0)
tui_start_enabled = 1;
if (interpreter_p && strcmp (interpreter_p, INTERP_CONSOLE) == 0)
{
xfree (interpreter_p);
interpreter_p = xstrdup (INTERP_TUI);
}
}
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