1 /* TUI Interpreter definitions for GDB, the GNU debugger.
3 Copyright 2003 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 #include "event-top.h"
26 #include "event-loop.h"
29 #include "tui/tui-data.h"
30 #include "readline/readline.h"
31 #include "tui/tui-win.h"
33 #include "tui/tui-io.h"
35 /* Set to 1 when the TUI mode must be activated when we first start gdb. */
36 static int tui_start_enabled
= 0;
38 /* Cleanup the tui before exiting. */
43 /* Disable the tui. Curses mode is left leaving the screen
44 in a clean state (see endwin()). */
48 /* These implement the TUI interpreter. */
53 /* Install exit handler to leave the screen in a good shape. */
56 tui_initialize_static_data ();
59 tui_initialize_readline ();
65 tui_resume (void *data
)
67 struct ui_file
*stream
;
69 /* gdb_setup_readline will change gdb_stdout. If the TUI was previously
70 writing to gdb_stdout, then set it to the new gdb_stdout afterwards. */
72 stream
= cli_out_set_stream (tui_old_uiout
, gdb_stdout
);
73 if (stream
!= gdb_stdout
)
75 cli_out_set_stream (tui_old_uiout
, stream
);
79 gdb_setup_readline ();
82 cli_out_set_stream (tui_old_uiout
, gdb_stdout
);
84 if (tui_start_enabled
)
90 tui_suspend (void *data
)
92 tui_start_enabled
= tui_active
;
97 /* Display the prompt if we are silent. */
100 tui_display_prompt_p (void *data
)
102 if (interp_quiet_p (NULL
))
109 tui_exec (void *data
, const char *command_str
)
111 internal_error (__FILE__
, __LINE__
, "tui_exec called");
115 /* Initialize all the necessary variables, start the event loop,
116 register readline, and stdin, start the loop. */
119 tui_command_loop (void *data
)
123 char *gdb_prompt
= get_prompt ();
125 /* If we are using readline, set things up and display the first
126 prompt, otherwise just print the prompt. */
127 if (async_command_editing_p
)
129 /* Tell readline what the prompt to display is and what function
130 it will need to call after a whole line is read. This also
131 displays the first prompt. */
132 length
= strlen (PREFIX (0)) + strlen (gdb_prompt
) + strlen (SUFFIX (0)) + 1;
133 a_prompt
= (char *) xmalloc (length
);
134 strcpy (a_prompt
, PREFIX (0));
135 strcat (a_prompt
, gdb_prompt
);
136 strcat (a_prompt
, SUFFIX (0));
137 rl_callback_handler_install (a_prompt
, input_handler
);
140 display_gdb_prompt (0);
142 /* Loop until there is nothing to do. This is the entry point to the
143 event loop engine. gdb_do_one_event, called via catch_errors()
144 will process one event for each invocation. It blocks waits for
145 an event and then processes it. >0 when an event is processed, 0
146 when catch_errors() caught an error and <0 when there are no
147 longer any event sources registered. */
150 int result
= catch_errors (gdb_do_one_event
, 0, "", RETURN_MASK_ALL
);
154 /* Update gdb output according to TUI mode. Since catch_errors
155 preserves the uiout from changing, this must be done at top
156 level of event loop. */
160 uiout
= tui_old_uiout
;
164 /* FIXME: this should really be a call to a hook that is
165 interface specific, because interfaces can display the
166 prompt in their own way. */
167 display_gdb_prompt (0);
168 /* This call looks bizarre, but it is required. If the user
169 entered a command that caused an error,
170 after_char_processing_hook won't be called from
171 rl_callback_read_char_wrapper. Using a cleanup there
172 won't work, since we want this function to be called
173 after a new prompt is printed. */
174 if (after_char_processing_hook
)
175 (*after_char_processing_hook
) ();
176 /* Maybe better to set a flag to be checked somewhere as to
177 whether display the prompt or not. */
181 /* We are done with the event loop. There are no more event sources
182 to listen to. So we exit GDB. */
187 _initialize_tui_interp (void)
189 static const struct interp_procs procs
= {
194 tui_display_prompt_p
,
197 struct interp
*tui_interp
;
199 /* Create a default uiout builder for the TUI. */
200 tui_out
= tui_out_new (gdb_stdout
);
201 interp_add (interp_new ("tui", NULL
, tui_out
, &procs
));
202 if (interpreter_p
&& strcmp (interpreter_p
, "tui") == 0)
203 tui_start_enabled
= 1;
205 if (interpreter_p
&& strcmp (interpreter_p
, INTERP_CONSOLE
) == 0)
207 xfree (interpreter_p
);
208 interpreter_p
= xstrdup ("tui");