|
428
|
1 /* Editor command loop.
|
|
|
2 Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
|
|
853
|
3 Copyright (C) 1995, 1996, 2001, 2002 Ben Wing.
|
|
428
|
4
|
|
|
5 This file is part of XEmacs.
|
|
|
6
|
|
|
7 XEmacs is free software; you can redistribute it and/or modify it
|
|
|
8 under the terms of the GNU General Public License as published by the
|
|
|
9 Free Software Foundation; either version 2, or (at your option) any
|
|
|
10 later version.
|
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|
11
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|
12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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|
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
|
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
|
15 for more details.
|
|
|
16
|
|
|
17 You should have received a copy of the GNU General Public License
|
|
|
18 along with XEmacs; see the file COPYING. If not, write to
|
|
|
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
20 Boston, MA 02111-1307, USA. */
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|
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21
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|
|
22 /* Synched up with: Mule 2.0. Not synched with FSF.
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|
23 This was renamed from keyboard.c. However, it only contains the
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|
|
24 command-loop stuff from FSF's keyboard.c; all the rest is in
|
|
|
25 event*.c, console.c, or signal.c. */
|
|
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26
|
|
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27 /* #### This module purports to separate out the command-loop stuff
|
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|
28 from event-stream.c, but it doesn't really. Perhaps this file
|
|
|
29 should just be merged into event-stream.c, given its shortness. */
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30
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31 #include <config.h>
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32 #include "lisp.h"
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33
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34 #include "buffer.h"
|
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872
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35 #include "console-impl.h"
|
|
800
|
36 #include "device.h"
|
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428
|
37 #include "commands.h"
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|
|
38 #include "frame.h"
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39 #include "events.h"
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|
40 #include "window.h"
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41
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872
|
42 #ifdef HAVE_MS_WINDOWS
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|
43 #include "console-msw.h"
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|
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44 #endif
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45
|
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428
|
46 /* Current depth in recursive edits. */
|
|
458
|
47 Fixnum command_loop_level;
|
|
428
|
48
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|
|
49 #ifndef LISP_COMMAND_LOOP
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|
50 /* Form to evaluate (if non-nil) when Emacs is started. */
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|
51 Lisp_Object Vtop_level;
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|
52 #else
|
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|
53 /* Function to call to evaluate to read and process events. */
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|
54 Lisp_Object Vcommand_loop;
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|
|
55 #endif /* LISP_COMMAND_LOOP */
|
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56
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|
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57 Lisp_Object Venter_window_hook, Vleave_window_hook;
|
|
|
58
|
|
733
|
59 Lisp_Object Qdisabled_command_hook, Vdisabled_command_hook;
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60
|
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428
|
61 /* The error handler. */
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62 Lisp_Object Qcommand_error;
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63
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64 /* The emergency error handler, before we're ready. */
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65 Lisp_Object Qreally_early_error_handler;
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66
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67 /* Variable defined in Lisp. */
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68 Lisp_Object Qerrors_deactivate_region;
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69
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70 Lisp_Object Qtop_level;
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71
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72 static Lisp_Object command_loop_1 (Lisp_Object dummy);
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|
73 EXFUN (Fcommand_loop_1, 0);
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74
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|
75 /* There are two possible command loops -- one written entirely in
|
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|
76 C and one written mostly in Lisp, except stuff written in C for
|
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77 speed. The advantage of the Lisp command loop is that the user
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78 can specify their own command loop to use by changing the variable
|
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79 `command-loop'. Its disadvantage is that it's slow. */
|
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80
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|
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81 static Lisp_Object
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82 default_error_handler (Lisp_Object data)
|
|
|
83 {
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|
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84 int speccount = specpdl_depth ();
|
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85
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|
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86 /* None of this is invoked, normally. This code is almost identical
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87 to the `command-error' function, except `command-error' does cool
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88 tricks with sounds. This function is a fallback, invoked if
|
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|
89 command-error is unavailable. */
|
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|
90
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|
|
91 Fding (Qnil, Qnil, Qnil);
|
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|
92
|
|
|
93 if (!NILP (Fboundp (Qerrors_deactivate_region))
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|
94 && !NILP (Fsymbol_value (Qerrors_deactivate_region)))
|
|
|
95 zmacs_deactivate_region ();
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|
|
96 Fdiscard_input ();
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|
|
97 specbind (Qinhibit_quit, Qt);
|
|
|
98 Vstandard_output = Qt;
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|
|
99 Vstandard_input = Qt;
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|
100 Vexecuting_macro = Qnil;
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|
|
101 Fset (intern ("last-error"), data);
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|
|
102 clear_echo_area (selected_frame (), Qnil, 0);
|
|
|
103 Fdisplay_error (data, Qt);
|
|
|
104 check_quit (); /* make Vquit_flag accurate */
|
|
|
105 Vquit_flag = Qnil;
|
|
771
|
106 return (unbind_to_1 (speccount, Qt));
|
|
428
|
107 }
|
|
|
108
|
|
|
109 DEFUN ("really-early-error-handler", Freally_early_error_handler, 1, 1, 0, /*
|
|
|
110 You should almost certainly not be using this.
|
|
|
111 */
|
|
|
112 (x))
|
|
|
113 {
|
|
|
114 /* This is an error handler used when we're running temacs and when
|
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115 we're in the early stages of XEmacs. No errors ought to be
|
|
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116 occurring in those cases (or they ought to be trapped and
|
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|
117 dealt with elsewhere), but if an error slips through, we need
|
|
|
118 to deal with it. We could write this function in Lisp (and it
|
|
|
119 used to be this way, at the beginning of loadup.el), but we do
|
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120 it this way in case an error occurs before we get to loading
|
|
|
121 loadup.el. Note that there is also an `early-error-handler',
|
|
|
122 used in startup.el to catch more reasonable errors that
|
|
|
123 might occur during startup if the sysadmin or whoever fucked
|
|
|
124 up. This function is more conservative in what it does
|
|
|
125 and is used only as a last resort, indicating that the
|
|
|
126 programmer himself fucked up somewhere. */
|
|
|
127 stderr_out ("*** Error in XEmacs initialization");
|
|
|
128 Fprint (x, Qexternal_debugging_output);
|
|
|
129 stderr_out ("*** Backtrace\n");
|
|
|
130 Fbacktrace (Qexternal_debugging_output, Qt);
|
|
|
131 stderr_out ("*** Killing XEmacs\n");
|
|
442
|
132 #ifdef HAVE_MS_WINDOWS
|
|
771
|
133 Fmswindows_message_box (build_msg_string ("Initialization error"),
|
|
442
|
134 Qnil, Qnil);
|
|
|
135 #endif
|
|
428
|
136 return Fkill_emacs (make_int (-1));
|
|
|
137 }
|
|
|
138
|
|
|
139
|
|
|
140 /**********************************************************************/
|
|
|
141 /* Command-loop (in C) */
|
|
|
142 /**********************************************************************/
|
|
|
143
|
|
|
144 #ifndef LISP_COMMAND_LOOP
|
|
|
145
|
|
|
146 /* The guts of the command loop are in command_loop_1(). This function
|
|
|
147 doesn't catch errors, though -- that's the job of command_loop_2(),
|
|
|
148 which is a condition-case wrapper around command_loop_1().
|
|
|
149 command_loop_1() never returns, but may get thrown out of.
|
|
|
150
|
|
|
151 When an error occurs, cmd_error() is called, which usually
|
|
|
152 invokes the Lisp error handler in `command-error'; however,
|
|
|
153 a default error handler is provided if `command-error' is nil
|
|
|
154 (e.g. during startup). The purpose of the error handler is
|
|
|
155 simply to display the error message and do associated cleanup;
|
|
|
156 it does not need to throw anywhere. When the error handler
|
|
|
157 finishes, the condition-case in command_loop_2() will finish and
|
|
|
158 command_loop_2() will reinvoke command_loop_1().
|
|
|
159
|
|
|
160 command_loop_2() is invoked from three places: from
|
|
|
161 initial_command_loop() (called from main() at the end of
|
|
|
162 internal initialization), from the Lisp function `recursive-edit',
|
|
|
163 and from call_command_loop().
|
|
|
164
|
|
|
165 call_command_loop() is called when a macro is started and when the
|
|
|
166 minibuffer is entered; normal termination of the macro or
|
|
|
167 minibuffer causes a throw out of the recursive command loop. (To
|
|
|
168 'execute-kbd-macro for macros and 'exit for minibuffers. Note also
|
|
|
169 that the low-level minibuffer-entering function,
|
|
|
170 `read-minibuffer-internal', provides its own error handling and
|
|
|
171 does not need command_loop_2()'s error encapsulation; so it tells
|
|
|
172 call_command_loop() to invoke command_loop_1() directly.)
|
|
|
173
|
|
|
174 Note that both read-minibuffer-internal and recursive-edit set
|
|
|
175 up a catch for 'exit; this is why `abort-recursive-edit', which
|
|
|
176 throws to this catch, exits out of either one.
|
|
|
177
|
|
|
178 initial_command_loop(), called from main(), sets up a catch
|
|
|
179 for 'top-level when invoking command_loop_2(), allowing functions
|
|
|
180 to throw all the way to the top level if they really need to.
|
|
|
181 Before invoking command_loop_2(), initial_command_loop() calls
|
|
|
182 top_level_1(), which handles all of the startup stuff (creating
|
|
|
183 the initial frame, handling the command-line options, loading
|
|
|
184 the user's .emacs file, etc.). The function that actually does this
|
|
|
185 is in Lisp and is pointed to by the variable `top-level';
|
|
|
186 normally this function is `normal-top-level'. top_level_1() is
|
|
|
187 just an error-handling wrapper similar to command_loop_2().
|
|
|
188 Note also that initial_command_loop() sets up a catch for 'top-level
|
|
|
189 when invoking top_level_1(), just like when it invokes
|
|
|
190 command_loop_2(). */
|
|
|
191
|
|
|
192
|
|
|
193 static Lisp_Object
|
|
|
194 cmd_error (Lisp_Object data, Lisp_Object dummy)
|
|
|
195 {
|
|
|
196 /* This function can GC */
|
|
|
197 check_quit (); /* make Vquit_flag accurate */
|
|
|
198 Vquit_flag = Qnil;
|
|
|
199
|
|
|
200 any_console_state ();
|
|
|
201
|
|
|
202 if (!NILP (Ffboundp (Qcommand_error)))
|
|
|
203 return call1 (Qcommand_error, data);
|
|
|
204
|
|
|
205 return default_error_handler (data);
|
|
|
206 }
|
|
|
207
|
|
|
208 static Lisp_Object
|
|
|
209 top_level_1 (Lisp_Object dummy)
|
|
|
210 {
|
|
|
211 /* This function can GC */
|
|
|
212 /* On entry to the outer level, run the startup file */
|
|
|
213 if (!NILP (Vtop_level))
|
|
|
214 condition_case_1 (Qerror, Feval, Vtop_level, cmd_error, Qnil);
|
|
|
215 #if 1
|
|
|
216 else
|
|
|
217 {
|
|
|
218 message ("\ntemacs can only be run in -batch mode.");
|
|
|
219 noninteractive = 1; /* prevent things under kill-emacs from blowing up */
|
|
|
220 Fkill_emacs (make_int (-1));
|
|
|
221 }
|
|
|
222 #else
|
|
|
223 else if (purify_flag)
|
|
|
224 message ("Bare impure Emacs (standard Lisp code not loaded)");
|
|
|
225 else
|
|
|
226 message ("Bare Emacs (standard Lisp code not loaded)");
|
|
|
227 #endif
|
|
|
228
|
|
|
229 return Qnil;
|
|
|
230 }
|
|
|
231
|
|
|
232 /* Here we catch errors in execution of commands within the
|
|
|
233 editing loop, and reenter the editing loop.
|
|
|
234 When there is an error, cmd_error runs and the call
|
|
|
235 to condition_case_1() returns. */
|
|
|
236
|
|
|
237 /* Avoid confusing the compiler. A helper function for command_loop_2 */
|
|
|
238 static DOESNT_RETURN
|
|
|
239 command_loop_3 (void)
|
|
|
240 {
|
|
|
241 #ifdef LWLIB_MENUBARS_LUCID
|
|
|
242 extern int in_menu_callback; /* defined in menubar-x.c */
|
|
|
243 #endif /* LWLIB_MENUBARS_LUCID */
|
|
|
244
|
|
|
245 #ifdef LWLIB_MENUBARS_LUCID
|
|
|
246 /*
|
|
|
247 * #### Fix the menu code so this isn't necessary.
|
|
|
248 *
|
|
|
249 * We cannot allow the lwmenu code to be reentered, because the
|
|
|
250 * code is not written to be reentrant and will crash. Therefore
|
|
|
251 * paths from the menu callbacks back into the menu code have to
|
|
|
252 * be blocked. Fnext_event is the normal path into the menu code,
|
|
|
253 * but waiting to signal an error there is too late in case where
|
|
|
254 * a new command loop has been started. The error will be caught
|
|
|
255 * and Fnext_event will be called again, looping forever. So we
|
|
|
256 * signal an error here to avoid the loop.
|
|
|
257 */
|
|
|
258 if (in_menu_callback)
|
|
563
|
259 invalid_operation ("Attempt to enter command_loop_3 inside menu callback", Qunbound);
|
|
428
|
260 #endif /* LWLIB_MENUBARS_LUCID */
|
|
|
261 /* This function can GC */
|
|
|
262 for (;;)
|
|
|
263 {
|
|
|
264 condition_case_1 (Qerror, command_loop_1, Qnil, cmd_error, Qnil);
|
|
|
265 /* #### wrong with selected-console? */
|
|
|
266 /* See command in initial_command_loop about why this value
|
|
|
267 is 0. */
|
|
|
268 reset_this_command_keys (Vselected_console, 0);
|
|
|
269 }
|
|
|
270 }
|
|
|
271
|
|
|
272 static Lisp_Object
|
|
|
273 command_loop_2 (Lisp_Object dummy)
|
|
|
274 {
|
|
|
275 command_loop_3(); /* doesn't return */
|
|
|
276 return Qnil;
|
|
|
277 }
|
|
|
278
|
|
|
279 /* This is called from emacs.c when it's done with initialization. */
|
|
|
280
|
|
|
281 DOESNT_RETURN
|
|
|
282 initial_command_loop (Lisp_Object load_me)
|
|
|
283 {
|
|
|
284 /* This function can GC */
|
|
|
285 if (!NILP (load_me))
|
|
|
286 Vtop_level = list2 (Qload, load_me);
|
|
|
287
|
|
|
288 /* First deal with startup and command-line arguments. A throw
|
|
|
289 to 'top-level gets us back here directly (does this ever happen?).
|
|
|
290 Otherwise, this function will return normally when all command-
|
|
|
291 line arguments have been processed, the user's initialization
|
|
|
292 file has been read in, and the first frame has been created. */
|
|
853
|
293 internal_catch (Qtop_level, top_level_1, Qnil, 0, 0);
|
|
428
|
294
|
|
|
295 /* If an error occurred during startup and the initial console
|
|
|
296 wasn't created, then die now (the error was already printed out
|
|
|
297 on the terminal device). */
|
|
|
298 if (!noninteractive &&
|
|
|
299 (!CONSOLEP (Vselected_console) ||
|
|
|
300 CONSOLE_STREAM_P (XCONSOLE (Vselected_console))))
|
|
|
301 Fkill_emacs (make_int (-1));
|
|
|
302
|
|
|
303 /* End of -batch run causes exit here. */
|
|
|
304 if (noninteractive)
|
|
|
305 Fkill_emacs (Qt);
|
|
|
306
|
|
|
307 for (;;)
|
|
|
308 {
|
|
|
309 command_loop_level = 0;
|
|
|
310 MARK_MODELINE_CHANGED;
|
|
|
311 /* Now invoke the command loop. It never returns; however, a
|
|
|
312 throw to 'top-level will place us at the end of this loop. */
|
|
853
|
313 internal_catch (Qtop_level, command_loop_2, Qnil, 0, 0);
|
|
428
|
314 /* #### wrong with selected-console? */
|
|
|
315 /* We don't actually call clear_echo_area() here, partially
|
|
|
316 at least because that runs Lisp code and it may be unsafe
|
|
|
317 to do so -- we are outside of the normal catches for
|
|
|
318 errors and such. */
|
|
|
319 reset_this_command_keys (Vselected_console, 0);
|
|
|
320 }
|
|
|
321 }
|
|
|
322
|
|
|
323 /* This function is invoked when a macro or minibuffer starts up.
|
|
|
324 Normal termination of the macro or minibuffer causes a throw past us.
|
|
|
325 See the comment above.
|
|
|
326
|
|
|
327 Note that this function never returns (but may be thrown out of). */
|
|
|
328
|
|
|
329 Lisp_Object
|
|
|
330 call_command_loop (Lisp_Object catch_errors)
|
|
|
331 {
|
|
|
332 /* This function can GC */
|
|
|
333 if (NILP (catch_errors))
|
|
|
334 return (command_loop_1 (Qnil));
|
|
|
335 else
|
|
|
336 return (command_loop_2 (Qnil));
|
|
|
337 }
|
|
|
338
|
|
|
339 static Lisp_Object
|
|
|
340 recursive_edit_unwind (Lisp_Object buffer)
|
|
|
341 {
|
|
|
342 if (!NILP (buffer))
|
|
|
343 Fset_buffer (buffer);
|
|
|
344
|
|
|
345 command_loop_level--;
|
|
|
346 MARK_MODELINE_CHANGED;
|
|
|
347
|
|
|
348 return Qnil;
|
|
|
349 }
|
|
|
350
|
|
|
351 DEFUN ("recursive-edit", Frecursive_edit, 0, 0, "", /*
|
|
|
352 Invoke the editor command loop recursively.
|
|
|
353 To get out of the recursive edit, a command can do `(throw 'exit nil)';
|
|
|
354 that tells this function to return.
|
|
|
355 Alternately, `(throw 'exit t)' makes this function signal an error.
|
|
|
356 */
|
|
|
357 ())
|
|
|
358 {
|
|
|
359 /* This function can GC */
|
|
|
360 Lisp_Object val;
|
|
|
361 int speccount = specpdl_depth ();
|
|
|
362
|
|
|
363 command_loop_level++;
|
|
|
364 MARK_MODELINE_CHANGED;
|
|
|
365
|
|
|
366 record_unwind_protect (recursive_edit_unwind,
|
|
872
|
367 current_buffer
|
|
|
368 != XWINDOW_XBUFFER (Fselected_window (Qnil))
|
|
428
|
369 ? Fcurrent_buffer ()
|
|
872
|
370 : Qnil);
|
|
428
|
371
|
|
|
372 specbind (Qstandard_output, Qt);
|
|
|
373 specbind (Qstandard_input, Qt);
|
|
|
374
|
|
853
|
375 val = internal_catch (Qexit, command_loop_2, Qnil, 0, 0);
|
|
428
|
376
|
|
|
377 if (EQ (val, Qt))
|
|
|
378 /* Turn abort-recursive-edit into a quit. */
|
|
|
379 Fsignal (Qquit, Qnil);
|
|
|
380
|
|
771
|
381 return unbind_to (speccount);
|
|
428
|
382 }
|
|
|
383
|
|
|
384 #endif /* !LISP_COMMAND_LOOP */
|
|
|
385
|
|
|
386
|
|
|
387 /**********************************************************************/
|
|
|
388 /* Alternate command-loop (largely in Lisp) */
|
|
|
389 /**********************************************************************/
|
|
|
390
|
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391 #ifdef LISP_COMMAND_LOOP
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392
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393 static Lisp_Object
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394 load1 (Lisp_Object name)
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395 {
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396 /* This function can GC */
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397 call4 (Qload, name, Qnil, Qt, Qnil);
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398 return (Qnil);
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399 }
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400
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401 /* emergency backups for cold-load-stream use */
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402 static Lisp_Object
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403 cold_load_command_error (Lisp_Object datum, Lisp_Object ignored)
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404 {
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405 /* This function can GC */
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406 check_quit (); /* make Vquit_flag accurate */
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407 Vquit_flag = Qnil;
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408
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409 return default_error_handler (datum);
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410 }
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411
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412 static Lisp_Object
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413 cold_load_command_loop (Lisp_Object dummy)
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414 {
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415 /* This function can GC */
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416 return (condition_case_1 (Qt,
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417 command_loop_1, Qnil,
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418 cold_load_command_error, Qnil));
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419 }
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420
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421 Lisp_Object
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422 call_command_loop (Lisp_Object catch_errors)
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423 {
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424 /* This function can GC */
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479
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425 reset_this_command_keys (Vselected_console, 0); /* #### bleagh */
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428
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426
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427 loop:
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428 for (;;)
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429 {
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430 if (NILP (Vcommand_loop))
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431 break;
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432 call1 (Vcommand_loop, catch_errors);
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433 }
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434
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435 /* This isn't a "correct" definition, but you're pretty hosed if
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436 you broke "command-loop" anyway */
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437 /* #### not correct with Vselected_console */
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438 XCONSOLE (Vselected_console)->prefix_arg = Qnil;
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439 if (NILP (catch_errors))
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440 Fcommand_loop_1 ();
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441 else
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442 internal_catch (Qtop_level,
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853
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443 cold_load_command_loop, Qnil, 0, 0);
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428
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444 goto loop;
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445 return Qnil;
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446 }
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447
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448 static Lisp_Object
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449 initial_error_handler (Lisp_Object datum, Lisp_Object ignored)
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450 {
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451 /* This function can GC */
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452 Vcommand_loop = Qnil;
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453 Fding (Qnil, Qnil, Qnil);
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454
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455 if (CONSP (datum) && EQ (XCAR (datum), Qquit))
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456 /* Don't bother with the message */
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457 return (Qt);
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458
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459 message ("Error in command-loop!!");
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460 Fset (intern ("last-error"), datum); /* #### Better/different name? */
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461 Fsit_for (make_int (2), Qnil);
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462 cold_load_command_error (datum, Qnil);
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463 return (Qt);
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464 }
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465
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466 DOESNT_RETURN
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467 initial_command_loop (Lisp_Object load_me)
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468 {
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469 /* This function can GC */
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470 if (!NILP (load_me))
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471 {
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472 if (!NILP (condition_case_1 (Qt, load1, load_me,
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473 initial_error_handler, Qnil)))
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474 Fkill_emacs (make_int (-1));
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475 }
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476
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477 for (;;)
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478 {
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479 command_loop_level = 0;
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480 MARK_MODELINE_CHANGED;
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481
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482 condition_case_1 (Qt,
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483 call_command_loop, Qtop_level,
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484 initial_error_handler, Qnil);
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485 }
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486 }
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487
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488 #endif /* LISP_COMMAND_LOOP */
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489
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490
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491 /**********************************************************************/
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492 /* Guts of command loop */
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493 /**********************************************************************/
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494
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495 static Lisp_Object
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496 command_loop_1 (Lisp_Object dummy)
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497 {
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498 /* This function can GC */
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499 /* #### not correct with Vselected_console */
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500 XCONSOLE (Vselected_console)->prefix_arg = Qnil;
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501 return (Fcommand_loop_1 ());
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502 }
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503
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504 /* This is the actual command reading loop, sans error-handling
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505 encapsulation. This is used for both the C and Lisp command
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506 loops. Originally this function was written in Lisp when
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507 the Lisp command loop was used, but it was too slow that way.
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508
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509 Under the C command loop, this function will never return
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510 (although someone might throw past it). Under the Lisp
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511 command loop, this will return only when the user specifies
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512 a new command loop by changing the command-loop variable. */
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513
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514 DEFUN ("command-loop-1", Fcommand_loop_1, 0, 0, 0, /*
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515 Invoke the internals of the canonical editor command loop.
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516 Don't call this unless you know what you're doing.
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517 */
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518 ())
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519 {
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520 /* This function can GC */
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521 Lisp_Object event = Fmake_event (Qnil, Qnil);
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522 Lisp_Object old_loop = Qnil;
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523 struct gcpro gcpro1, gcpro2;
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524 int was_locked = in_single_console_state ();
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525 GCPRO2 (event, old_loop);
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526
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527 /* cancel_echoing (); */
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528 /* This magically makes single character keyboard macros work just
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529 like the real thing. This is slightly bogus, but it's in here for
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530 compatibility with Emacs 18. It's not even clear what the "right
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531 thing" is. */
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434
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532 if (!((STRINGP (Vexecuting_macro) || VECTORP (Vexecuting_macro))
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533 && XINT (Flength (Vexecuting_macro)) == 1))
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428
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534 Vlast_command = Qt;
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535
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536 #ifndef LISP_COMMAND_LOOP
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537 while (1)
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538 #else
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539 old_loop = Vcommand_loop;
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540 while (EQ (Vcommand_loop, old_loop))
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541 #endif /* LISP_COMMAND_LOOP */
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542 {
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543 /* If focus_follows_mouse, make sure the frame with window manager
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544 focus is selected. */
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545 if (focus_follows_mouse)
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546 investigate_frame_change ();
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434
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547
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428
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548 /* Make sure the current window's buffer is selected. */
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549 {
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550 Lisp_Object selected_window = Fselected_window (Qnil);
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551
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552 if (!NILP (selected_window) &&
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872
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553 XWINDOW_XBUFFER (selected_window) != current_buffer)
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428
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554 {
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872
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555 set_buffer_internal (XWINDOW_XBUFFER (selected_window));
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428
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556 }
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557 }
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558
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444
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559 #if 0 /* What's wrong with going through ordinary procedure of quit?
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560 quitting here leaves overriding-terminal-local-map
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561 when you type C-u C-u C-g. */
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428
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562 /* If ^G was typed before we got here (that is, before emacs was
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563 idle and waiting for input) then we treat that as an interrupt. */
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564 QUIT;
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444
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565 #endif
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428
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566
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567 /* If minibuffer on and echo area in use, wait 2 sec and redraw
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568 minibuffer. Treat a ^G here as a command, not an interrupt.
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569 */
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570 if (minibuf_level > 0 && echo_area_active (selected_frame ()))
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571 {
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572 /* Bind dont_check_for_quit to 1 so that C-g gets read in
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573 rather than quitting back to the minibuffer. */
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771
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574 int count = begin_dont_check_for_quit ();
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428
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575 Fsit_for (make_int (2), Qnil);
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576 clear_echo_area (selected_frame (), Qnil, 0);
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853
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577 Vquit_flag = Qnil; /* see begin_dont_check_for_quit() */
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771
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578 unbind_to (count);
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428
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579 }
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580
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581 Fnext_event (event, Qnil);
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582 Fdispatch_event (event);
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583
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584 if (!was_locked)
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585 any_console_state ();
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586 #if (defined (_MSC_VER) \
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587 || defined (__SUNPRO_C) \
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588 || defined (__SUNPRO_CC) \
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589 || (defined (DEC_ALPHA) \
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590 && defined (OSF1)))
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591 if (0) return Qnil; /* Shut up compiler */
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592 #endif
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593 }
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594 #ifdef LISP_COMMAND_LOOP
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595 UNGCPRO;
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596 return Qnil;
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597 #endif
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598 }
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599
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600
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601 /**********************************************************************/
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602 /* Initialization */
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603 /**********************************************************************/
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604
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605 void
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606 syms_of_cmdloop (void)
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607 {
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733
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608 DEFSYMBOL (Qdisabled_command_hook);
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563
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609 DEFSYMBOL (Qcommand_error);
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610 DEFSYMBOL (Qreally_early_error_handler);
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611 DEFSYMBOL (Qtop_level);
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612 DEFSYMBOL (Qerrors_deactivate_region);
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428
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613
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614 #ifndef LISP_COMMAND_LOOP
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615 DEFSUBR (Frecursive_edit);
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616 #endif
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617 DEFSUBR (Freally_early_error_handler);
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618 DEFSUBR (Fcommand_loop_1);
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619 }
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620
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621 void
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622 vars_of_cmdloop (void)
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623 {
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624 DEFVAR_INT ("command-loop-level", &command_loop_level /*
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625 Number of recursive edits in progress.
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626 */ );
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627 command_loop_level = 0;
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628
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629 DEFVAR_LISP ("disabled-command-hook", &Vdisabled_command_hook /*
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630 Value is called instead of any command that is disabled,
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631 i.e. has a non-nil `disabled' property.
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632 */ );
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633 Vdisabled_command_hook = intern ("disabled-command-hook");
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634
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635 DEFVAR_LISP ("leave-window-hook", &Vleave_window_hook /*
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636 Not yet implemented.
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637 */ );
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638 Vleave_window_hook = Qnil;
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639
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640 DEFVAR_LISP ("enter-window-hook", &Venter_window_hook /*
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641 Not yet implemented.
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642 */ );
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643 Venter_window_hook = Qnil;
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644
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645 #ifndef LISP_COMMAND_LOOP
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646 DEFVAR_LISP ("top-level", &Vtop_level /*
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647 Form to evaluate when Emacs starts up.
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648 Useful to set before you dump a modified Emacs.
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649 */ );
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650 Vtop_level = Qnil;
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651 #else
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652 DEFVAR_LISP ("command-loop", &Vcommand_loop /*
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653 Function or one argument to call to read and process keyboard commands.
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654 The passed argument specifies whether or not to handle errors.
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655 */ );
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656 Vcommand_loop = Qnil;
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657 #endif /* LISP_COMMAND_LOOP */
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658 }
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