|
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.
|
|
|
11
|
|
|
12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
|
|
|
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. */
|
|
|
21
|
|
|
22 /* Synched up with: Mule 2.0. Not synched with FSF.
|
|
|
23 This was renamed from keyboard.c. However, it only contains the
|
|
|
24 command-loop stuff from FSF's keyboard.c; all the rest is in
|
|
|
25 event*.c, console.c, or signal.c. */
|
|
|
26
|
|
|
27 /* #### This module purports to separate out the command-loop stuff
|
|
|
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
|
|
|
31 #include <config.h>
|
|
|
32 #include "lisp.h"
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33
|
|
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34 #include "buffer.h"
|
|
872
|
35 #include "console-impl.h"
|
|
800
|
36 #include "device.h"
|
|
428
|
37 #include "commands.h"
|
|
|
38 #include "frame.h"
|
|
|
39 #include "events.h"
|
|
|
40 #include "window.h"
|
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41
|
|
872
|
42 #ifdef HAVE_MS_WINDOWS
|
|
|
43 #include "console-msw.h"
|
|
|
44 #endif
|
|
|
45
|
|
428
|
46 /* Current depth in recursive edits. */
|
|
458
|
47 Fixnum command_loop_level;
|
|
428
|
48
|
|
|
49 #ifndef LISP_COMMAND_LOOP
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|
50 /* Form to evaluate (if non-nil) when Emacs is started. */
|
|
|
51 Lisp_Object Vtop_level;
|
|
|
52 #else
|
|
|
53 /* Function to call to evaluate to read and process events. */
|
|
|
54 Lisp_Object Vcommand_loop;
|
|
|
55 #endif /* LISP_COMMAND_LOOP */
|
|
|
56
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|
|
57 Lisp_Object Venter_window_hook, Vleave_window_hook;
|
|
|
58
|
|
733
|
59 Lisp_Object Qdisabled_command_hook, Vdisabled_command_hook;
|
|
|
60
|
|
428
|
61 /* The error handler. */
|
|
|
62 Lisp_Object Qcommand_error;
|
|
|
63
|
|
|
64 /* The emergency error handler, before we're ready. */
|
|
|
65 Lisp_Object Qreally_early_error_handler;
|
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66
|
|
|
67 /* Variable defined in Lisp. */
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|
|
68 Lisp_Object Qerrors_deactivate_region;
|
|
|
69
|
|
|
70 Lisp_Object Qtop_level;
|
|
1703
|
71 Lisp_Object Vminibuffer_echo_wait_function;
|
|
428
|
72
|
|
|
73 static Lisp_Object command_loop_1 (Lisp_Object dummy);
|
|
|
74 EXFUN (Fcommand_loop_1, 0);
|
|
|
75
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|
|
76 /* There are two possible command loops -- one written entirely in
|
|
|
77 C and one written mostly in Lisp, except stuff written in C for
|
|
|
78 speed. The advantage of the Lisp command loop is that the user
|
|
|
79 can specify their own command loop to use by changing the variable
|
|
|
80 `command-loop'. Its disadvantage is that it's slow. */
|
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81
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|
|
82 static Lisp_Object
|
|
|
83 default_error_handler (Lisp_Object data)
|
|
|
84 {
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|
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85 int speccount = specpdl_depth ();
|
|
|
86
|
|
|
87 /* None of this is invoked, normally. This code is almost identical
|
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|
88 to the `command-error' function, except `command-error' does cool
|
|
|
89 tricks with sounds. This function is a fallback, invoked if
|
|
|
90 command-error is unavailable. */
|
|
|
91
|
|
|
92 Fding (Qnil, Qnil, Qnil);
|
|
|
93
|
|
|
94 if (!NILP (Fboundp (Qerrors_deactivate_region))
|
|
|
95 && !NILP (Fsymbol_value (Qerrors_deactivate_region)))
|
|
|
96 zmacs_deactivate_region ();
|
|
|
97 Fdiscard_input ();
|
|
|
98 specbind (Qinhibit_quit, Qt);
|
|
|
99 Vstandard_output = Qt;
|
|
|
100 Vstandard_input = Qt;
|
|
|
101 Vexecuting_macro = Qnil;
|
|
|
102 Fset (intern ("last-error"), data);
|
|
|
103 clear_echo_area (selected_frame (), Qnil, 0);
|
|
|
104 Fdisplay_error (data, Qt);
|
|
|
105 check_quit (); /* make Vquit_flag accurate */
|
|
|
106 Vquit_flag = Qnil;
|
|
771
|
107 return (unbind_to_1 (speccount, Qt));
|
|
428
|
108 }
|
|
|
109
|
|
|
110 DEFUN ("really-early-error-handler", Freally_early_error_handler, 1, 1, 0, /*
|
|
|
111 You should almost certainly not be using this.
|
|
|
112 */
|
|
|
113 (x))
|
|
|
114 {
|
|
|
115 /* This is an error handler used when we're running temacs and when
|
|
|
116 we're in the early stages of XEmacs. No errors ought to be
|
|
|
117 occurring in those cases (or they ought to be trapped and
|
|
|
118 dealt with elsewhere), but if an error slips through, we need
|
|
|
119 to deal with it. We could write this function in Lisp (and it
|
|
|
120 used to be this way, at the beginning of loadup.el), but we do
|
|
|
121 it this way in case an error occurs before we get to loading
|
|
|
122 loadup.el. Note that there is also an `early-error-handler',
|
|
|
123 used in startup.el to catch more reasonable errors that
|
|
|
124 might occur during startup if the sysadmin or whoever fucked
|
|
|
125 up. This function is more conservative in what it does
|
|
|
126 and is used only as a last resort, indicating that the
|
|
|
127 programmer himself fucked up somewhere. */
|
|
|
128 stderr_out ("*** Error in XEmacs initialization");
|
|
|
129 Fprint (x, Qexternal_debugging_output);
|
|
|
130 stderr_out ("*** Backtrace\n");
|
|
|
131 Fbacktrace (Qexternal_debugging_output, Qt);
|
|
|
132 stderr_out ("*** Killing XEmacs\n");
|
|
442
|
133 #ifdef HAVE_MS_WINDOWS
|
|
771
|
134 Fmswindows_message_box (build_msg_string ("Initialization error"),
|
|
442
|
135 Qnil, Qnil);
|
|
|
136 #endif
|
|
428
|
137 return Fkill_emacs (make_int (-1));
|
|
|
138 }
|
|
|
139
|
|
|
140
|
|
|
141 /**********************************************************************/
|
|
|
142 /* Command-loop (in C) */
|
|
|
143 /**********************************************************************/
|
|
|
144
|
|
|
145 #ifndef LISP_COMMAND_LOOP
|
|
|
146
|
|
|
147 /* The guts of the command loop are in command_loop_1(). This function
|
|
|
148 doesn't catch errors, though -- that's the job of command_loop_2(),
|
|
|
149 which is a condition-case wrapper around command_loop_1().
|
|
|
150 command_loop_1() never returns, but may get thrown out of.
|
|
|
151
|
|
|
152 When an error occurs, cmd_error() is called, which usually
|
|
|
153 invokes the Lisp error handler in `command-error'; however,
|
|
|
154 a default error handler is provided if `command-error' is nil
|
|
|
155 (e.g. during startup). The purpose of the error handler is
|
|
|
156 simply to display the error message and do associated cleanup;
|
|
|
157 it does not need to throw anywhere. When the error handler
|
|
|
158 finishes, the condition-case in command_loop_2() will finish and
|
|
|
159 command_loop_2() will reinvoke command_loop_1().
|
|
|
160
|
|
|
161 command_loop_2() is invoked from three places: from
|
|
|
162 initial_command_loop() (called from main() at the end of
|
|
|
163 internal initialization), from the Lisp function `recursive-edit',
|
|
|
164 and from call_command_loop().
|
|
|
165
|
|
|
166 call_command_loop() is called when a macro is started and when the
|
|
|
167 minibuffer is entered; normal termination of the macro or
|
|
|
168 minibuffer causes a throw out of the recursive command loop. (To
|
|
|
169 'execute-kbd-macro for macros and 'exit for minibuffers. Note also
|
|
|
170 that the low-level minibuffer-entering function,
|
|
|
171 `read-minibuffer-internal', provides its own error handling and
|
|
|
172 does not need command_loop_2()'s error encapsulation; so it tells
|
|
|
173 call_command_loop() to invoke command_loop_1() directly.)
|
|
|
174
|
|
|
175 Note that both read-minibuffer-internal and recursive-edit set
|
|
|
176 up a catch for 'exit; this is why `abort-recursive-edit', which
|
|
|
177 throws to this catch, exits out of either one.
|
|
|
178
|
|
|
179 initial_command_loop(), called from main(), sets up a catch
|
|
|
180 for 'top-level when invoking command_loop_2(), allowing functions
|
|
|
181 to throw all the way to the top level if they really need to.
|
|
|
182 Before invoking command_loop_2(), initial_command_loop() calls
|
|
|
183 top_level_1(), which handles all of the startup stuff (creating
|
|
|
184 the initial frame, handling the command-line options, loading
|
|
|
185 the user's .emacs file, etc.). The function that actually does this
|
|
|
186 is in Lisp and is pointed to by the variable `top-level';
|
|
|
187 normally this function is `normal-top-level'. top_level_1() is
|
|
|
188 just an error-handling wrapper similar to command_loop_2().
|
|
|
189 Note also that initial_command_loop() sets up a catch for 'top-level
|
|
|
190 when invoking top_level_1(), just like when it invokes
|
|
|
191 command_loop_2(). */
|
|
|
192
|
|
|
193
|
|
|
194 static Lisp_Object
|
|
|
195 cmd_error (Lisp_Object data, Lisp_Object dummy)
|
|
|
196 {
|
|
|
197 /* This function can GC */
|
|
|
198 check_quit (); /* make Vquit_flag accurate */
|
|
|
199 Vquit_flag = Qnil;
|
|
|
200
|
|
|
201 any_console_state ();
|
|
|
202
|
|
|
203 if (!NILP (Ffboundp (Qcommand_error)))
|
|
|
204 return call1 (Qcommand_error, data);
|
|
|
205
|
|
|
206 return default_error_handler (data);
|
|
|
207 }
|
|
|
208
|
|
|
209 static Lisp_Object
|
|
|
210 top_level_1 (Lisp_Object dummy)
|
|
|
211 {
|
|
|
212 /* This function can GC */
|
|
|
213 /* On entry to the outer level, run the startup file */
|
|
|
214 if (!NILP (Vtop_level))
|
|
|
215 condition_case_1 (Qerror, Feval, Vtop_level, cmd_error, Qnil);
|
|
|
216 #if 1
|
|
|
217 else
|
|
|
218 {
|
|
|
219 message ("\ntemacs can only be run in -batch mode.");
|
|
|
220 noninteractive = 1; /* prevent things under kill-emacs from blowing up */
|
|
|
221 Fkill_emacs (make_int (-1));
|
|
|
222 }
|
|
|
223 #else
|
|
|
224 else if (purify_flag)
|
|
|
225 message ("Bare impure Emacs (standard Lisp code not loaded)");
|
|
|
226 else
|
|
|
227 message ("Bare Emacs (standard Lisp code not loaded)");
|
|
|
228 #endif
|
|
|
229
|
|
|
230 return Qnil;
|
|
|
231 }
|
|
|
232
|
|
|
233 /* Here we catch errors in execution of commands within the
|
|
|
234 editing loop, and reenter the editing loop.
|
|
|
235 When there is an error, cmd_error runs and the call
|
|
|
236 to condition_case_1() returns. */
|
|
|
237
|
|
|
238 /* Avoid confusing the compiler. A helper function for command_loop_2 */
|
|
|
239 static DOESNT_RETURN
|
|
|
240 command_loop_3 (void)
|
|
|
241 {
|
|
|
242 /*
|
|
1268
|
243 * If we are inside of a menu callback we cannot reenter the command loop
|
|
|
244 * because we will deadlock, as no input is allowed.
|
|
428
|
245 */
|
|
1268
|
246 if (in_modal_loop)
|
|
|
247 invalid_operation ("Attempt to enter command loop inside menu callback",
|
|
|
248 Qunbound);
|
|
428
|
249 /* This function can GC */
|
|
|
250 for (;;)
|
|
|
251 {
|
|
|
252 condition_case_1 (Qerror, command_loop_1, Qnil, cmd_error, Qnil);
|
|
|
253 /* #### wrong with selected-console? */
|
|
|
254 /* See command in initial_command_loop about why this value
|
|
|
255 is 0. */
|
|
|
256 reset_this_command_keys (Vselected_console, 0);
|
|
|
257 }
|
|
|
258 }
|
|
|
259
|
|
|
260 static Lisp_Object
|
|
|
261 command_loop_2 (Lisp_Object dummy)
|
|
|
262 {
|
|
|
263 command_loop_3(); /* doesn't return */
|
|
|
264 return Qnil;
|
|
|
265 }
|
|
|
266
|
|
|
267 /* This is called from emacs.c when it's done with initialization. */
|
|
|
268
|
|
|
269 DOESNT_RETURN
|
|
|
270 initial_command_loop (Lisp_Object load_me)
|
|
|
271 {
|
|
|
272 /* This function can GC */
|
|
|
273 if (!NILP (load_me))
|
|
|
274 Vtop_level = list2 (Qload, load_me);
|
|
|
275
|
|
|
276 /* First deal with startup and command-line arguments. A throw
|
|
|
277 to 'top-level gets us back here directly (does this ever happen?).
|
|
|
278 Otherwise, this function will return normally when all command-
|
|
|
279 line arguments have been processed, the user's initialization
|
|
|
280 file has been read in, and the first frame has been created. */
|
|
853
|
281 internal_catch (Qtop_level, top_level_1, Qnil, 0, 0);
|
|
428
|
282
|
|
|
283 /* If an error occurred during startup and the initial console
|
|
|
284 wasn't created, then die now (the error was already printed out
|
|
|
285 on the terminal device). */
|
|
|
286 if (!noninteractive &&
|
|
|
287 (!CONSOLEP (Vselected_console) ||
|
|
|
288 CONSOLE_STREAM_P (XCONSOLE (Vselected_console))))
|
|
|
289 Fkill_emacs (make_int (-1));
|
|
|
290
|
|
|
291 /* End of -batch run causes exit here. */
|
|
|
292 if (noninteractive)
|
|
|
293 Fkill_emacs (Qt);
|
|
|
294
|
|
|
295 for (;;)
|
|
|
296 {
|
|
|
297 command_loop_level = 0;
|
|
|
298 MARK_MODELINE_CHANGED;
|
|
|
299 /* Now invoke the command loop. It never returns; however, a
|
|
|
300 throw to 'top-level will place us at the end of this loop. */
|
|
853
|
301 internal_catch (Qtop_level, command_loop_2, Qnil, 0, 0);
|
|
428
|
302 /* #### wrong with selected-console? */
|
|
|
303 /* We don't actually call clear_echo_area() here, partially
|
|
|
304 at least because that runs Lisp code and it may be unsafe
|
|
|
305 to do so -- we are outside of the normal catches for
|
|
|
306 errors and such. */
|
|
|
307 reset_this_command_keys (Vselected_console, 0);
|
|
|
308 }
|
|
|
309 }
|
|
|
310
|
|
|
311 /* This function is invoked when a macro or minibuffer starts up.
|
|
|
312 Normal termination of the macro or minibuffer causes a throw past us.
|
|
|
313 See the comment above.
|
|
|
314
|
|
|
315 Note that this function never returns (but may be thrown out of). */
|
|
|
316
|
|
|
317 Lisp_Object
|
|
|
318 call_command_loop (Lisp_Object catch_errors)
|
|
|
319 {
|
|
|
320 /* This function can GC */
|
|
|
321 if (NILP (catch_errors))
|
|
|
322 return (command_loop_1 (Qnil));
|
|
|
323 else
|
|
|
324 return (command_loop_2 (Qnil));
|
|
|
325 }
|
|
|
326
|
|
|
327 static Lisp_Object
|
|
|
328 recursive_edit_unwind (Lisp_Object buffer)
|
|
|
329 {
|
|
|
330 if (!NILP (buffer))
|
|
|
331 Fset_buffer (buffer);
|
|
|
332
|
|
|
333 command_loop_level--;
|
|
|
334 MARK_MODELINE_CHANGED;
|
|
|
335
|
|
|
336 return Qnil;
|
|
|
337 }
|
|
|
338
|
|
|
339 DEFUN ("recursive-edit", Frecursive_edit, 0, 0, "", /*
|
|
|
340 Invoke the editor command loop recursively.
|
|
|
341 To get out of the recursive edit, a command can do `(throw 'exit nil)';
|
|
|
342 that tells this function to return.
|
|
|
343 Alternately, `(throw 'exit t)' makes this function signal an error.
|
|
|
344 */
|
|
|
345 ())
|
|
|
346 {
|
|
|
347 /* This function can GC */
|
|
|
348 Lisp_Object val;
|
|
|
349 int speccount = specpdl_depth ();
|
|
|
350
|
|
|
351 command_loop_level++;
|
|
|
352 MARK_MODELINE_CHANGED;
|
|
|
353
|
|
|
354 record_unwind_protect (recursive_edit_unwind,
|
|
872
|
355 current_buffer
|
|
|
356 != XWINDOW_XBUFFER (Fselected_window (Qnil))
|
|
428
|
357 ? Fcurrent_buffer ()
|
|
872
|
358 : Qnil);
|
|
428
|
359
|
|
|
360 specbind (Qstandard_output, Qt);
|
|
|
361 specbind (Qstandard_input, Qt);
|
|
|
362
|
|
853
|
363 val = internal_catch (Qexit, command_loop_2, Qnil, 0, 0);
|
|
428
|
364
|
|
|
365 if (EQ (val, Qt))
|
|
|
366 /* Turn abort-recursive-edit into a quit. */
|
|
|
367 Fsignal (Qquit, Qnil);
|
|
|
368
|
|
771
|
369 return unbind_to (speccount);
|
|
428
|
370 }
|
|
|
371
|
|
|
372 #endif /* !LISP_COMMAND_LOOP */
|
|
|
373
|
|
|
374
|
|
|
375 /**********************************************************************/
|
|
|
376 /* Alternate command-loop (largely in Lisp) */
|
|
|
377 /**********************************************************************/
|
|
|
378
|
|
|
379 #ifdef LISP_COMMAND_LOOP
|
|
|
380
|
|
|
381 static Lisp_Object
|
|
|
382 load1 (Lisp_Object name)
|
|
|
383 {
|
|
|
384 /* This function can GC */
|
|
|
385 call4 (Qload, name, Qnil, Qt, Qnil);
|
|
|
386 return (Qnil);
|
|
|
387 }
|
|
|
388
|
|
|
389 /* emergency backups for cold-load-stream use */
|
|
|
390 static Lisp_Object
|
|
|
391 cold_load_command_error (Lisp_Object datum, Lisp_Object ignored)
|
|
|
392 {
|
|
|
393 /* This function can GC */
|
|
|
394 check_quit (); /* make Vquit_flag accurate */
|
|
|
395 Vquit_flag = Qnil;
|
|
|
396
|
|
|
397 return default_error_handler (datum);
|
|
|
398 }
|
|
|
399
|
|
|
400 static Lisp_Object
|
|
|
401 cold_load_command_loop (Lisp_Object dummy)
|
|
|
402 {
|
|
|
403 /* This function can GC */
|
|
|
404 return (condition_case_1 (Qt,
|
|
|
405 command_loop_1, Qnil,
|
|
|
406 cold_load_command_error, Qnil));
|
|
|
407 }
|
|
|
408
|
|
|
409 Lisp_Object
|
|
|
410 call_command_loop (Lisp_Object catch_errors)
|
|
|
411 {
|
|
|
412 /* This function can GC */
|
|
479
|
413 reset_this_command_keys (Vselected_console, 0); /* #### bleagh */
|
|
428
|
414
|
|
|
415 loop:
|
|
|
416 for (;;)
|
|
|
417 {
|
|
|
418 if (NILP (Vcommand_loop))
|
|
|
419 break;
|
|
|
420 call1 (Vcommand_loop, catch_errors);
|
|
|
421 }
|
|
|
422
|
|
|
423 /* This isn't a "correct" definition, but you're pretty hosed if
|
|
|
424 you broke "command-loop" anyway */
|
|
|
425 /* #### not correct with Vselected_console */
|
|
|
426 XCONSOLE (Vselected_console)->prefix_arg = Qnil;
|
|
|
427 if (NILP (catch_errors))
|
|
|
428 Fcommand_loop_1 ();
|
|
|
429 else
|
|
|
430 internal_catch (Qtop_level,
|
|
853
|
431 cold_load_command_loop, Qnil, 0, 0);
|
|
428
|
432 goto loop;
|
|
|
433 return Qnil;
|
|
|
434 }
|
|
|
435
|
|
|
436 static Lisp_Object
|
|
|
437 initial_error_handler (Lisp_Object datum, Lisp_Object ignored)
|
|
|
438 {
|
|
|
439 /* This function can GC */
|
|
|
440 Vcommand_loop = Qnil;
|
|
|
441 Fding (Qnil, Qnil, Qnil);
|
|
|
442
|
|
|
443 if (CONSP (datum) && EQ (XCAR (datum), Qquit))
|
|
|
444 /* Don't bother with the message */
|
|
|
445 return (Qt);
|
|
|
446
|
|
|
447 message ("Error in command-loop!!");
|
|
|
448 Fset (intern ("last-error"), datum); /* #### Better/different name? */
|
|
|
449 Fsit_for (make_int (2), Qnil);
|
|
|
450 cold_load_command_error (datum, Qnil);
|
|
|
451 return (Qt);
|
|
|
452 }
|
|
|
453
|
|
|
454 DOESNT_RETURN
|
|
|
455 initial_command_loop (Lisp_Object load_me)
|
|
|
456 {
|
|
|
457 /* This function can GC */
|
|
|
458 if (!NILP (load_me))
|
|
|
459 {
|
|
|
460 if (!NILP (condition_case_1 (Qt, load1, load_me,
|
|
|
461 initial_error_handler, Qnil)))
|
|
|
462 Fkill_emacs (make_int (-1));
|
|
|
463 }
|
|
|
464
|
|
|
465 for (;;)
|
|
|
466 {
|
|
|
467 command_loop_level = 0;
|
|
|
468 MARK_MODELINE_CHANGED;
|
|
|
469
|
|
|
470 condition_case_1 (Qt,
|
|
|
471 call_command_loop, Qtop_level,
|
|
|
472 initial_error_handler, Qnil);
|
|
|
473 }
|
|
|
474 }
|
|
|
475
|
|
|
476 #endif /* LISP_COMMAND_LOOP */
|
|
|
477
|
|
|
478
|
|
|
479 /**********************************************************************/
|
|
|
480 /* Guts of command loop */
|
|
|
481 /**********************************************************************/
|
|
|
482
|
|
|
483 static Lisp_Object
|
|
|
484 command_loop_1 (Lisp_Object dummy)
|
|
|
485 {
|
|
|
486 /* This function can GC */
|
|
|
487 /* #### not correct with Vselected_console */
|
|
|
488 XCONSOLE (Vselected_console)->prefix_arg = Qnil;
|
|
|
489 return (Fcommand_loop_1 ());
|
|
|
490 }
|
|
|
491
|
|
|
492 /* This is the actual command reading loop, sans error-handling
|
|
|
493 encapsulation. This is used for both the C and Lisp command
|
|
|
494 loops. Originally this function was written in Lisp when
|
|
|
495 the Lisp command loop was used, but it was too slow that way.
|
|
|
496
|
|
|
497 Under the C command loop, this function will never return
|
|
|
498 (although someone might throw past it). Under the Lisp
|
|
|
499 command loop, this will return only when the user specifies
|
|
|
500 a new command loop by changing the command-loop variable. */
|
|
|
501
|
|
|
502 DEFUN ("command-loop-1", Fcommand_loop_1, 0, 0, 0, /*
|
|
|
503 Invoke the internals of the canonical editor command loop.
|
|
|
504 Don't call this unless you know what you're doing.
|
|
|
505 */
|
|
|
506 ())
|
|
|
507 {
|
|
|
508 /* This function can GC */
|
|
|
509 Lisp_Object event = Fmake_event (Qnil, Qnil);
|
|
|
510 Lisp_Object old_loop = Qnil;
|
|
|
511 struct gcpro gcpro1, gcpro2;
|
|
|
512 int was_locked = in_single_console_state ();
|
|
|
513 GCPRO2 (event, old_loop);
|
|
|
514
|
|
|
515 /* cancel_echoing (); */
|
|
|
516 /* This magically makes single character keyboard macros work just
|
|
|
517 like the real thing. This is slightly bogus, but it's in here for
|
|
|
518 compatibility with Emacs 18. It's not even clear what the "right
|
|
|
519 thing" is. */
|
|
434
|
520 if (!((STRINGP (Vexecuting_macro) || VECTORP (Vexecuting_macro))
|
|
|
521 && XINT (Flength (Vexecuting_macro)) == 1))
|
|
428
|
522 Vlast_command = Qt;
|
|
|
523
|
|
|
524 #ifndef LISP_COMMAND_LOOP
|
|
|
525 while (1)
|
|
|
526 #else
|
|
|
527 old_loop = Vcommand_loop;
|
|
|
528 while (EQ (Vcommand_loop, old_loop))
|
|
|
529 #endif /* LISP_COMMAND_LOOP */
|
|
|
530 {
|
|
|
531 /* If focus_follows_mouse, make sure the frame with window manager
|
|
|
532 focus is selected. */
|
|
|
533 if (focus_follows_mouse)
|
|
|
534 investigate_frame_change ();
|
|
434
|
535
|
|
428
|
536 /* Make sure the current window's buffer is selected. */
|
|
|
537 {
|
|
|
538 Lisp_Object selected_window = Fselected_window (Qnil);
|
|
|
539
|
|
|
540 if (!NILP (selected_window) &&
|
|
872
|
541 XWINDOW_XBUFFER (selected_window) != current_buffer)
|
|
428
|
542 {
|
|
872
|
543 set_buffer_internal (XWINDOW_XBUFFER (selected_window));
|
|
428
|
544 }
|
|
|
545 }
|
|
|
546
|
|
444
|
547 #if 0 /* What's wrong with going through ordinary procedure of quit?
|
|
|
548 quitting here leaves overriding-terminal-local-map
|
|
|
549 when you type C-u C-u C-g. */
|
|
428
|
550 /* If ^G was typed before we got here (that is, before emacs was
|
|
|
551 idle and waiting for input) then we treat that as an interrupt. */
|
|
|
552 QUIT;
|
|
444
|
553 #endif
|
|
428
|
554
|
|
|
555 /* If minibuffer on and echo area in use, wait 2 sec and redraw
|
|
|
556 minibuffer. Treat a ^G here as a command, not an interrupt.
|
|
|
557 */
|
|
|
558 if (minibuf_level > 0 && echo_area_active (selected_frame ()))
|
|
|
559 {
|
|
|
560 /* Bind dont_check_for_quit to 1 so that C-g gets read in
|
|
|
561 rather than quitting back to the minibuffer. */
|
|
771
|
562 int count = begin_dont_check_for_quit ();
|
|
1703
|
563 if (!NILP (Vminibuffer_echo_wait_function))
|
|
|
564 call0 (Vminibuffer_echo_wait_function);
|
|
|
565 else
|
|
|
566 Fsit_for (make_int (2), Qnil);
|
|
428
|
567 clear_echo_area (selected_frame (), Qnil, 0);
|
|
853
|
568 Vquit_flag = Qnil; /* see begin_dont_check_for_quit() */
|
|
771
|
569 unbind_to (count);
|
|
428
|
570 }
|
|
|
571
|
|
|
572 Fnext_event (event, Qnil);
|
|
|
573 Fdispatch_event (event);
|
|
|
574
|
|
|
575 if (!was_locked)
|
|
|
576 any_console_state ();
|
|
1204
|
577
|
|
|
578 DO_NOTHING_DISABLING_NO_RETURN_WARNINGS;
|
|
428
|
579 }
|
|
|
580 #ifdef LISP_COMMAND_LOOP
|
|
|
581 UNGCPRO;
|
|
|
582 return Qnil;
|
|
1204
|
583 #else
|
|
|
584 RETURN_NOT_REACHED (Qnil);
|
|
428
|
585 #endif
|
|
|
586 }
|
|
|
587
|
|
|
588
|
|
|
589 /**********************************************************************/
|
|
|
590 /* Initialization */
|
|
|
591 /**********************************************************************/
|
|
|
592
|
|
|
593 void
|
|
|
594 syms_of_cmdloop (void)
|
|
|
595 {
|
|
733
|
596 DEFSYMBOL (Qdisabled_command_hook);
|
|
563
|
597 DEFSYMBOL (Qcommand_error);
|
|
|
598 DEFSYMBOL (Qreally_early_error_handler);
|
|
|
599 DEFSYMBOL (Qtop_level);
|
|
|
600 DEFSYMBOL (Qerrors_deactivate_region);
|
|
428
|
601
|
|
|
602 #ifndef LISP_COMMAND_LOOP
|
|
|
603 DEFSUBR (Frecursive_edit);
|
|
|
604 #endif
|
|
|
605 DEFSUBR (Freally_early_error_handler);
|
|
|
606 DEFSUBR (Fcommand_loop_1);
|
|
|
607 }
|
|
|
608
|
|
|
609 void
|
|
|
610 vars_of_cmdloop (void)
|
|
|
611 {
|
|
|
612 DEFVAR_INT ("command-loop-level", &command_loop_level /*
|
|
|
613 Number of recursive edits in progress.
|
|
|
614 */ );
|
|
|
615 command_loop_level = 0;
|
|
|
616
|
|
|
617 DEFVAR_LISP ("disabled-command-hook", &Vdisabled_command_hook /*
|
|
|
618 Value is called instead of any command that is disabled,
|
|
|
619 i.e. has a non-nil `disabled' property.
|
|
|
620 */ );
|
|
|
621 Vdisabled_command_hook = intern ("disabled-command-hook");
|
|
|
622
|
|
|
623 DEFVAR_LISP ("leave-window-hook", &Vleave_window_hook /*
|
|
|
624 Not yet implemented.
|
|
|
625 */ );
|
|
|
626 Vleave_window_hook = Qnil;
|
|
|
627
|
|
|
628 DEFVAR_LISP ("enter-window-hook", &Venter_window_hook /*
|
|
|
629 Not yet implemented.
|
|
|
630 */ );
|
|
|
631 Venter_window_hook = Qnil;
|
|
|
632
|
|
1703
|
633 DEFVAR_LISP ("minibuffer-echo-wait-function",
|
|
|
634 &Vminibuffer_echo_wait_function /*
|
|
|
635 The function called by command loop when minibuffer was active and
|
|
|
636 message was displayed (text appeared in \" *Echo Area*\" buffer). It
|
|
|
637 must wait after displaying message so that user can read it. If the
|
|
|
638 variable value is `nil', the equivalent of `(sit-for 2)' is run.
|
|
|
639 */ );
|
|
|
640 Vminibuffer_echo_wait_function = Qnil;
|
|
|
641
|
|
428
|
642 #ifndef LISP_COMMAND_LOOP
|
|
|
643 DEFVAR_LISP ("top-level", &Vtop_level /*
|
|
|
644 Form to evaluate when Emacs starts up.
|
|
|
645 Useful to set before you dump a modified Emacs.
|
|
|
646 */ );
|
|
|
647 Vtop_level = Qnil;
|
|
|
648 #else
|
|
|
649 DEFVAR_LISP ("command-loop", &Vcommand_loop /*
|
|
|
650 Function or one argument to call to read and process keyboard commands.
|
|
|
651 The passed argument specifies whether or not to handle errors.
|
|
|
652 */ );
|
|
|
653 Vcommand_loop = Qnil;
|
|
|
654 #endif /* LISP_COMMAND_LOOP */
|
|
|
655 }
|
