|
428
|
1 /* Editor command loop.
|
|
|
2 Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
|
|
2532
|
3 Copyright (C) 1995, 1996, 2001, 2002, 2003 Ben Wing.
|
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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. */
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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
|
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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
|
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|
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
|
35 #include "console-impl.h"
|
|
800
|
36 #include "device.h"
|
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428
|
37 #include "commands.h"
|
|
|
38 #include "frame.h"
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|
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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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|
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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;
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58
|
|
733
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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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|
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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;
|
|
1703
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71 Lisp_Object Vminibuffer_echo_wait_function;
|
|
428
|
72
|
|
2268
|
73 #ifdef LISP_COMMAND_LOOP
|
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428
|
74 static Lisp_Object command_loop_1 (Lisp_Object dummy);
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|
|
75 EXFUN (Fcommand_loop_1, 0);
|
|
2268
|
76 #else
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77 static DECLARE_DOESNT_RETURN_TYPE (Lisp_Object,
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78 command_loop_1 (Lisp_Object dummy));
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|
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79 EXFUN_NORETURN (Fcommand_loop_1, 0);
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|
|
80 #endif
|
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428
|
81
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|
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82 /* There are two possible command loops -- one written entirely in
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83 C and one written mostly in Lisp, except stuff written in C for
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84 speed. The advantage of the Lisp command loop is that the user
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85 can specify their own command loop to use by changing the variable
|
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86 `command-loop'. Its disadvantage is that it's slow. */
|
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87
|
|
|
88 static Lisp_Object
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|
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89 default_error_handler (Lisp_Object data)
|
|
|
90 {
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|
|
91 int speccount = specpdl_depth ();
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92
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93 /* None of this is invoked, normally. This code is almost identical
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|
94 to the `command-error' function, except `command-error' does cool
|
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95 tricks with sounds. This function is a fallback, invoked if
|
|
|
96 command-error is unavailable. */
|
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|
97
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|
|
98 Fding (Qnil, Qnil, Qnil);
|
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|
99
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|
|
100 if (!NILP (Fboundp (Qerrors_deactivate_region))
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|
101 && !NILP (Fsymbol_value (Qerrors_deactivate_region)))
|
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102 zmacs_deactivate_region ();
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103 Fdiscard_input ();
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|
|
104 specbind (Qinhibit_quit, Qt);
|
|
|
105 Vstandard_output = Qt;
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|
|
106 Vstandard_input = Qt;
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|
|
107 Vexecuting_macro = Qnil;
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|
|
108 Fset (intern ("last-error"), data);
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|
|
109 clear_echo_area (selected_frame (), Qnil, 0);
|
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|
110 Fdisplay_error (data, Qt);
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|
|
111 check_quit (); /* make Vquit_flag accurate */
|
|
|
112 Vquit_flag = Qnil;
|
|
771
|
113 return (unbind_to_1 (speccount, Qt));
|
|
428
|
114 }
|
|
|
115
|
|
2268
|
116 DEFUN_NORETURN ("really-early-error-handler", Freally_early_error_handler,
|
|
|
117 1, 1, 0, /*
|
|
428
|
118 You should almost certainly not be using this.
|
|
|
119 */
|
|
|
120 (x))
|
|
|
121 {
|
|
|
122 /* This is an error handler used when we're running temacs and when
|
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123 we're in the early stages of XEmacs. No errors ought to be
|
|
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124 occurring in those cases (or they ought to be trapped and
|
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|
125 dealt with elsewhere), but if an error slips through, we need
|
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|
126 to deal with it. We could write this function in Lisp (and it
|
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|
127 used to be this way, at the beginning of loadup.el), but we do
|
|
|
128 it this way in case an error occurs before we get to loading
|
|
|
129 loadup.el. Note that there is also an `early-error-handler',
|
|
|
130 used in startup.el to catch more reasonable errors that
|
|
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131 might occur during startup if the sysadmin or whoever fucked
|
|
|
132 up. This function is more conservative in what it does
|
|
|
133 and is used only as a last resort, indicating that the
|
|
|
134 programmer himself fucked up somewhere. */
|
|
|
135 stderr_out ("*** Error in XEmacs initialization");
|
|
|
136 Fprint (x, Qexternal_debugging_output);
|
|
|
137 stderr_out ("*** Backtrace\n");
|
|
|
138 Fbacktrace (Qexternal_debugging_output, Qt);
|
|
|
139 stderr_out ("*** Killing XEmacs\n");
|
|
442
|
140 #ifdef HAVE_MS_WINDOWS
|
|
771
|
141 Fmswindows_message_box (build_msg_string ("Initialization error"),
|
|
442
|
142 Qnil, Qnil);
|
|
|
143 #endif
|
|
2268
|
144 Fkill_emacs (make_int (-1));
|
|
|
145 RETURN_NOT_REACHED (Qnil);
|
|
428
|
146 }
|
|
|
147
|
|
|
148
|
|
|
149 /**********************************************************************/
|
|
|
150 /* Command-loop (in C) */
|
|
|
151 /**********************************************************************/
|
|
|
152
|
|
|
153 #ifndef LISP_COMMAND_LOOP
|
|
|
154
|
|
|
155 /* The guts of the command loop are in command_loop_1(). This function
|
|
|
156 doesn't catch errors, though -- that's the job of command_loop_2(),
|
|
|
157 which is a condition-case wrapper around command_loop_1().
|
|
|
158 command_loop_1() never returns, but may get thrown out of.
|
|
|
159
|
|
|
160 When an error occurs, cmd_error() is called, which usually
|
|
|
161 invokes the Lisp error handler in `command-error'; however,
|
|
|
162 a default error handler is provided if `command-error' is nil
|
|
|
163 (e.g. during startup). The purpose of the error handler is
|
|
|
164 simply to display the error message and do associated cleanup;
|
|
|
165 it does not need to throw anywhere. When the error handler
|
|
|
166 finishes, the condition-case in command_loop_2() will finish and
|
|
|
167 command_loop_2() will reinvoke command_loop_1().
|
|
|
168
|
|
|
169 command_loop_2() is invoked from three places: from
|
|
|
170 initial_command_loop() (called from main() at the end of
|
|
|
171 internal initialization), from the Lisp function `recursive-edit',
|
|
|
172 and from call_command_loop().
|
|
|
173
|
|
|
174 call_command_loop() is called when a macro is started and when the
|
|
|
175 minibuffer is entered; normal termination of the macro or
|
|
|
176 minibuffer causes a throw out of the recursive command loop. (To
|
|
3025
|
177 `execute-kbd-macro' for macros and `exit' for minibuffers. Note also
|
|
428
|
178 that the low-level minibuffer-entering function,
|
|
|
179 `read-minibuffer-internal', provides its own error handling and
|
|
|
180 does not need command_loop_2()'s error encapsulation; so it tells
|
|
|
181 call_command_loop() to invoke command_loop_1() directly.)
|
|
|
182
|
|
|
183 Note that both read-minibuffer-internal and recursive-edit set
|
|
3025
|
184 up a catch for `exit'; this is why `abort-recursive-edit', which
|
|
428
|
185 throws to this catch, exits out of either one.
|
|
|
186
|
|
|
187 initial_command_loop(), called from main(), sets up a catch
|
|
3025
|
188 for `top-level' when invoking command_loop_2(), allowing functions
|
|
428
|
189 to throw all the way to the top level if they really need to.
|
|
|
190 Before invoking command_loop_2(), initial_command_loop() calls
|
|
|
191 top_level_1(), which handles all of the startup stuff (creating
|
|
|
192 the initial frame, handling the command-line options, loading
|
|
|
193 the user's .emacs file, etc.). The function that actually does this
|
|
|
194 is in Lisp and is pointed to by the variable `top-level';
|
|
|
195 normally this function is `normal-top-level'. top_level_1() is
|
|
|
196 just an error-handling wrapper similar to command_loop_2().
|
|
3025
|
197 Note also that initial_command_loop() sets up a catch for `top-level'
|
|
428
|
198 when invoking top_level_1(), just like when it invokes
|
|
|
199 command_loop_2(). */
|
|
|
200
|
|
|
201
|
|
|
202 static Lisp_Object
|
|
2286
|
203 cmd_error (Lisp_Object data, Lisp_Object UNUSED (dummy))
|
|
428
|
204 {
|
|
|
205 /* This function can GC */
|
|
|
206 check_quit (); /* make Vquit_flag accurate */
|
|
|
207 Vquit_flag = Qnil;
|
|
|
208
|
|
|
209 any_console_state ();
|
|
|
210
|
|
|
211 if (!NILP (Ffboundp (Qcommand_error)))
|
|
|
212 return call1 (Qcommand_error, data);
|
|
|
213
|
|
|
214 return default_error_handler (data);
|
|
|
215 }
|
|
|
216
|
|
|
217 static Lisp_Object
|
|
2286
|
218 top_level_1 (Lisp_Object UNUSED (dummy))
|
|
428
|
219 {
|
|
|
220 /* This function can GC */
|
|
|
221 /* On entry to the outer level, run the startup file */
|
|
|
222 if (!NILP (Vtop_level))
|
|
|
223 condition_case_1 (Qerror, Feval, Vtop_level, cmd_error, Qnil);
|
|
|
224 #if 1
|
|
|
225 else
|
|
|
226 {
|
|
|
227 message ("\ntemacs can only be run in -batch mode.");
|
|
|
228 noninteractive = 1; /* prevent things under kill-emacs from blowing up */
|
|
|
229 Fkill_emacs (make_int (-1));
|
|
|
230 }
|
|
|
231 #else
|
|
|
232 else if (purify_flag)
|
|
|
233 message ("Bare impure Emacs (standard Lisp code not loaded)");
|
|
|
234 else
|
|
|
235 message ("Bare Emacs (standard Lisp code not loaded)");
|
|
|
236 #endif
|
|
|
237
|
|
|
238 return Qnil;
|
|
|
239 }
|
|
|
240
|
|
|
241 /* Here we catch errors in execution of commands within the
|
|
|
242 editing loop, and reenter the editing loop.
|
|
|
243 When there is an error, cmd_error runs and the call
|
|
|
244 to condition_case_1() returns. */
|
|
|
245
|
|
|
246 /* Avoid confusing the compiler. A helper function for command_loop_2 */
|
|
2268
|
247 static DECLARE_DOESNT_RETURN (command_loop_3 (void));
|
|
|
248
|
|
428
|
249 static DOESNT_RETURN
|
|
|
250 command_loop_3 (void)
|
|
|
251 {
|
|
|
252 /*
|
|
1268
|
253 * If we are inside of a menu callback we cannot reenter the command loop
|
|
|
254 * because we will deadlock, as no input is allowed.
|
|
428
|
255 */
|
|
1268
|
256 if (in_modal_loop)
|
|
|
257 invalid_operation ("Attempt to enter command loop inside menu callback",
|
|
|
258 Qunbound);
|
|
428
|
259 /* This function can GC */
|
|
|
260 for (;;)
|
|
|
261 {
|
|
|
262 condition_case_1 (Qerror, command_loop_1, Qnil, cmd_error, Qnil);
|
|
|
263 /* #### wrong with selected-console? */
|
|
|
264 /* See command in initial_command_loop about why this value
|
|
|
265 is 0. */
|
|
|
266 reset_this_command_keys (Vselected_console, 0);
|
|
|
267 }
|
|
|
268 }
|
|
|
269
|
|
2268
|
270 static DECLARE_DOESNT_RETURN_TYPE (Lisp_Object, command_loop_2 (Lisp_Object));
|
|
|
271
|
|
|
272 static DOESNT_RETURN_TYPE (Lisp_Object)
|
|
2286
|
273 command_loop_2 (Lisp_Object UNUSED (dummy))
|
|
428
|
274 {
|
|
|
275 command_loop_3(); /* doesn't return */
|
|
2268
|
276 RETURN_NOT_REACHED (Qnil);
|
|
428
|
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
|
|
3025
|
289 to `top-level' gets us back here directly (does this ever happen?).
|
|
428
|
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. */
|
|
2532
|
293 internal_catch (Qtop_level, top_level_1, Qnil, 0, 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
|
|
3025
|
312 throw to `top-level' will place us at the end of this loop. */
|
|
2532
|
313 internal_catch (Qtop_level, command_loop_2, Qnil, 0, 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
|
|
2268
|
329 DOESNT_RETURN_TYPE (Lisp_Object)
|
|
428
|
330 call_command_loop (Lisp_Object catch_errors)
|
|
|
331 {
|
|
|
332 /* This function can GC */
|
|
|
333 if (NILP (catch_errors))
|
|
2268
|
334 command_loop_1 (Qnil);
|
|
428
|
335 else
|
|
2268
|
336 command_loop_2 (Qnil);
|
|
|
337 RETURN_NOT_REACHED (Qnil);
|
|
428
|
338 }
|
|
|
339
|
|
|
340 static Lisp_Object
|
|
|
341 recursive_edit_unwind (Lisp_Object buffer)
|
|
|
342 {
|
|
|
343 if (!NILP (buffer))
|
|
|
344 Fset_buffer (buffer);
|
|
|
345
|
|
|
346 command_loop_level--;
|
|
|
347 MARK_MODELINE_CHANGED;
|
|
|
348
|
|
|
349 return Qnil;
|
|
|
350 }
|
|
|
351
|
|
|
352 DEFUN ("recursive-edit", Frecursive_edit, 0, 0, "", /*
|
|
|
353 Invoke the editor command loop recursively.
|
|
|
354 To get out of the recursive edit, a command can do `(throw 'exit nil)';
|
|
|
355 that tells this function to return.
|
|
|
356 Alternately, `(throw 'exit t)' makes this function signal an error.
|
|
|
357 */
|
|
|
358 ())
|
|
|
359 {
|
|
|
360 /* This function can GC */
|
|
|
361 Lisp_Object val;
|
|
|
362 int speccount = specpdl_depth ();
|
|
|
363
|
|
|
364 command_loop_level++;
|
|
|
365 MARK_MODELINE_CHANGED;
|
|
|
366
|
|
|
367 record_unwind_protect (recursive_edit_unwind,
|
|
872
|
368 current_buffer
|
|
|
369 != XWINDOW_XBUFFER (Fselected_window (Qnil))
|
|
428
|
370 ? Fcurrent_buffer ()
|
|
872
|
371 : Qnil);
|
|
428
|
372
|
|
|
373 specbind (Qstandard_output, Qt);
|
|
|
374 specbind (Qstandard_input, Qt);
|
|
|
375
|
|
2532
|
376 val = internal_catch (Qexit, command_loop_2, Qnil, 0, 0, 0);
|
|
428
|
377
|
|
|
378 if (EQ (val, Qt))
|
|
|
379 /* Turn abort-recursive-edit into a quit. */
|
|
|
380 Fsignal (Qquit, Qnil);
|
|
|
381
|
|
771
|
382 return unbind_to (speccount);
|
|
428
|
383 }
|
|
|
384
|
|
|
385 #endif /* !LISP_COMMAND_LOOP */
|
|
|
386
|
|
|
387
|
|
|
388 /**********************************************************************/
|
|
|
389 /* Alternate command-loop (largely in Lisp) */
|
|
|
390 /**********************************************************************/
|
|
|
391
|
|
|
392 #ifdef LISP_COMMAND_LOOP
|
|
|
393
|
|
|
394 static Lisp_Object
|
|
|
395 load1 (Lisp_Object name)
|
|
|
396 {
|
|
|
397 /* This function can GC */
|
|
|
398 call4 (Qload, name, Qnil, Qt, Qnil);
|
|
|
399 return (Qnil);
|
|
|
400 }
|
|
|
401
|
|
|
402 /* emergency backups for cold-load-stream use */
|
|
|
403 static Lisp_Object
|
|
|
404 cold_load_command_error (Lisp_Object datum, Lisp_Object ignored)
|
|
|
405 {
|
|
|
406 /* This function can GC */
|
|
|
407 check_quit (); /* make Vquit_flag accurate */
|
|
|
408 Vquit_flag = Qnil;
|
|
|
409
|
|
|
410 return default_error_handler (datum);
|
|
|
411 }
|
|
|
412
|
|
|
413 static Lisp_Object
|
|
|
414 cold_load_command_loop (Lisp_Object dummy)
|
|
|
415 {
|
|
|
416 /* This function can GC */
|
|
|
417 return (condition_case_1 (Qt,
|
|
|
418 command_loop_1, Qnil,
|
|
|
419 cold_load_command_error, Qnil));
|
|
|
420 }
|
|
|
421
|
|
2268
|
422 DOESNT_RETURN_TYPE (Lisp_Object)
|
|
428
|
423 call_command_loop (Lisp_Object catch_errors)
|
|
|
424 {
|
|
|
425 /* This function can GC */
|
|
479
|
426 reset_this_command_keys (Vselected_console, 0); /* #### bleagh */
|
|
428
|
427
|
|
|
428 loop:
|
|
|
429 for (;;)
|
|
|
430 {
|
|
|
431 if (NILP (Vcommand_loop))
|
|
|
432 break;
|
|
|
433 call1 (Vcommand_loop, catch_errors);
|
|
|
434 }
|
|
|
435
|
|
|
436 /* This isn't a "correct" definition, but you're pretty hosed if
|
|
|
437 you broke "command-loop" anyway */
|
|
|
438 /* #### not correct with Vselected_console */
|
|
|
439 XCONSOLE (Vselected_console)->prefix_arg = Qnil;
|
|
|
440 if (NILP (catch_errors))
|
|
|
441 Fcommand_loop_1 ();
|
|
|
442 else
|
|
2532
|
443 internal_catch (Qtop_level, cold_load_command_loop, Qnil, 0, 0, 0);
|
|
428
|
444 goto loop;
|
|
2268
|
445 RETURN_NOT_REACHED (Qnil);
|
|
428
|
446 }
|
|
|
447
|
|
|
448 static Lisp_Object
|
|
|
449 initial_error_handler (Lisp_Object datum, Lisp_Object ignored)
|
|
|
450 {
|
|
|
451 /* This function can GC */
|
|
|
452 Vcommand_loop = Qnil;
|
|
|
453 Fding (Qnil, Qnil, Qnil);
|
|
|
454
|
|
|
455 if (CONSP (datum) && EQ (XCAR (datum), Qquit))
|
|
|
456 /* Don't bother with the message */
|
|
|
457 return (Qt);
|
|
|
458
|
|
|
459 message ("Error in command-loop!!");
|
|
|
460 Fset (intern ("last-error"), datum); /* #### Better/different name? */
|
|
|
461 Fsit_for (make_int (2), Qnil);
|
|
|
462 cold_load_command_error (datum, Qnil);
|
|
|
463 return (Qt);
|
|
|
464 }
|
|
|
465
|
|
|
466 DOESNT_RETURN
|
|
|
467 initial_command_loop (Lisp_Object load_me)
|
|
|
468 {
|
|
|
469 /* This function can GC */
|
|
|
470 if (!NILP (load_me))
|
|
|
471 {
|
|
|
472 if (!NILP (condition_case_1 (Qt, load1, load_me,
|
|
|
473 initial_error_handler, Qnil)))
|
|
|
474 Fkill_emacs (make_int (-1));
|
|
|
475 }
|
|
|
476
|
|
|
477 for (;;)
|
|
|
478 {
|
|
|
479 command_loop_level = 0;
|
|
|
480 MARK_MODELINE_CHANGED;
|
|
|
481
|
|
|
482 condition_case_1 (Qt,
|
|
|
483 call_command_loop, Qtop_level,
|
|
|
484 initial_error_handler, Qnil);
|
|
|
485 }
|
|
|
486 }
|
|
|
487
|
|
|
488 #endif /* LISP_COMMAND_LOOP */
|
|
|
489
|
|
|
490
|
|
|
491 /**********************************************************************/
|
|
|
492 /* Guts of command loop */
|
|
|
493 /**********************************************************************/
|
|
|
494
|
|
2268
|
495 #ifdef LISP_COMMAND_LOOP
|
|
428
|
496 static Lisp_Object
|
|
2268
|
497 #else
|
|
|
498 static DOESNT_RETURN_TYPE (Lisp_Object)
|
|
|
499 #endif
|
|
2286
|
500 command_loop_1 (Lisp_Object UNUSED (dummy))
|
|
428
|
501 {
|
|
|
502 /* This function can GC */
|
|
|
503 /* #### not correct with Vselected_console */
|
|
|
504 XCONSOLE (Vselected_console)->prefix_arg = Qnil;
|
|
2268
|
505 Fcommand_loop_1 ();
|
|
|
506 #ifdef LISP_COMMAND_LOOP
|
|
|
507 return Qnil;
|
|
|
508 #else
|
|
|
509 RETURN_NOT_REACHED (Qnil);
|
|
|
510 #endif
|
|
428
|
511 }
|
|
|
512
|
|
|
513 /* This is the actual command reading loop, sans error-handling
|
|
|
514 encapsulation. This is used for both the C and Lisp command
|
|
|
515 loops. Originally this function was written in Lisp when
|
|
|
516 the Lisp command loop was used, but it was too slow that way.
|
|
|
517
|
|
|
518 Under the C command loop, this function will never return
|
|
|
519 (although someone might throw past it). Under the Lisp
|
|
|
520 command loop, this will return only when the user specifies
|
|
|
521 a new command loop by changing the command-loop variable. */
|
|
|
522
|
|
2268
|
523 #ifdef LISP_COMMAND_LOOP
|
|
|
524 #define DEFUN_COMMAND_LOOP(a,b,c,d,e,f) DEFUN (a, b, c, d, e, f)
|
|
|
525 #else
|
|
|
526 #define DEFUN_COMMAND_LOOP(a,b,c,d,e,f) DEFUN_NORETURN (a, b, c, d, e, f)
|
|
|
527 #endif
|
|
|
528
|
|
|
529 DEFUN_COMMAND_LOOP ("command-loop-1", Fcommand_loop_1, 0, 0, 0, /*
|
|
428
|
530 Invoke the internals of the canonical editor command loop.
|
|
|
531 Don't call this unless you know what you're doing.
|
|
|
532 */
|
|
|
533 ())
|
|
|
534 {
|
|
|
535 /* This function can GC */
|
|
|
536 Lisp_Object event = Fmake_event (Qnil, Qnil);
|
|
|
537 Lisp_Object old_loop = Qnil;
|
|
|
538 struct gcpro gcpro1, gcpro2;
|
|
|
539 int was_locked = in_single_console_state ();
|
|
|
540 GCPRO2 (event, old_loop);
|
|
|
541
|
|
|
542 /* cancel_echoing (); */
|
|
|
543 /* This magically makes single character keyboard macros work just
|
|
|
544 like the real thing. This is slightly bogus, but it's in here for
|
|
|
545 compatibility with Emacs 18. It's not even clear what the "right
|
|
|
546 thing" is. */
|
|
434
|
547 if (!((STRINGP (Vexecuting_macro) || VECTORP (Vexecuting_macro))
|
|
|
548 && XINT (Flength (Vexecuting_macro)) == 1))
|
|
428
|
549 Vlast_command = Qt;
|
|
|
550
|
|
|
551 #ifndef LISP_COMMAND_LOOP
|
|
|
552 while (1)
|
|
|
553 #else
|
|
|
554 old_loop = Vcommand_loop;
|
|
|
555 while (EQ (Vcommand_loop, old_loop))
|
|
|
556 #endif /* LISP_COMMAND_LOOP */
|
|
|
557 {
|
|
|
558 /* If focus_follows_mouse, make sure the frame with window manager
|
|
|
559 focus is selected. */
|
|
|
560 if (focus_follows_mouse)
|
|
|
561 investigate_frame_change ();
|
|
434
|
562
|
|
428
|
563 /* Make sure the current window's buffer is selected. */
|
|
|
564 {
|
|
|
565 Lisp_Object selected_window = Fselected_window (Qnil);
|
|
|
566
|
|
|
567 if (!NILP (selected_window) &&
|
|
872
|
568 XWINDOW_XBUFFER (selected_window) != current_buffer)
|
|
428
|
569 {
|
|
872
|
570 set_buffer_internal (XWINDOW_XBUFFER (selected_window));
|
|
428
|
571 }
|
|
|
572 }
|
|
|
573
|
|
444
|
574 #if 0 /* What's wrong with going through ordinary procedure of quit?
|
|
|
575 quitting here leaves overriding-terminal-local-map
|
|
|
576 when you type C-u C-u C-g. */
|
|
428
|
577 /* If ^G was typed before we got here (that is, before emacs was
|
|
|
578 idle and waiting for input) then we treat that as an interrupt. */
|
|
|
579 QUIT;
|
|
444
|
580 #endif
|
|
428
|
581
|
|
|
582 /* If minibuffer on and echo area in use, wait 2 sec and redraw
|
|
|
583 minibuffer. Treat a ^G here as a command, not an interrupt.
|
|
|
584 */
|
|
|
585 if (minibuf_level > 0 && echo_area_active (selected_frame ()))
|
|
|
586 {
|
|
|
587 /* Bind dont_check_for_quit to 1 so that C-g gets read in
|
|
|
588 rather than quitting back to the minibuffer. */
|
|
771
|
589 int count = begin_dont_check_for_quit ();
|
|
1703
|
590 if (!NILP (Vminibuffer_echo_wait_function))
|
|
|
591 call0 (Vminibuffer_echo_wait_function);
|
|
|
592 else
|
|
|
593 Fsit_for (make_int (2), Qnil);
|
|
428
|
594 clear_echo_area (selected_frame (), Qnil, 0);
|
|
853
|
595 Vquit_flag = Qnil; /* see begin_dont_check_for_quit() */
|
|
771
|
596 unbind_to (count);
|
|
428
|
597 }
|
|
|
598
|
|
|
599 Fnext_event (event, Qnil);
|
|
|
600 Fdispatch_event (event);
|
|
|
601
|
|
|
602 if (!was_locked)
|
|
|
603 any_console_state ();
|
|
1204
|
604
|
|
|
605 DO_NOTHING_DISABLING_NO_RETURN_WARNINGS;
|
|
428
|
606 }
|
|
|
607 #ifdef LISP_COMMAND_LOOP
|
|
|
608 UNGCPRO;
|
|
|
609 return Qnil;
|
|
1204
|
610 #else
|
|
|
611 RETURN_NOT_REACHED (Qnil);
|
|
428
|
612 #endif
|
|
|
613 }
|
|
|
614
|
|
|
615
|
|
|
616 /**********************************************************************/
|
|
|
617 /* Initialization */
|
|
|
618 /**********************************************************************/
|
|
|
619
|
|
|
620 void
|
|
|
621 syms_of_cmdloop (void)
|
|
|
622 {
|
|
733
|
623 DEFSYMBOL (Qdisabled_command_hook);
|
|
563
|
624 DEFSYMBOL (Qcommand_error);
|
|
|
625 DEFSYMBOL (Qreally_early_error_handler);
|
|
|
626 DEFSYMBOL (Qtop_level);
|
|
|
627 DEFSYMBOL (Qerrors_deactivate_region);
|
|
428
|
628
|
|
|
629 #ifndef LISP_COMMAND_LOOP
|
|
|
630 DEFSUBR (Frecursive_edit);
|
|
|
631 #endif
|
|
|
632 DEFSUBR (Freally_early_error_handler);
|
|
|
633 DEFSUBR (Fcommand_loop_1);
|
|
|
634 }
|
|
|
635
|
|
|
636 void
|
|
|
637 vars_of_cmdloop (void)
|
|
|
638 {
|
|
|
639 DEFVAR_INT ("command-loop-level", &command_loop_level /*
|
|
|
640 Number of recursive edits in progress.
|
|
|
641 */ );
|
|
|
642 command_loop_level = 0;
|
|
|
643
|
|
|
644 DEFVAR_LISP ("disabled-command-hook", &Vdisabled_command_hook /*
|
|
|
645 Value is called instead of any command that is disabled,
|
|
|
646 i.e. has a non-nil `disabled' property.
|
|
|
647 */ );
|
|
|
648 Vdisabled_command_hook = intern ("disabled-command-hook");
|
|
|
649
|
|
|
650 DEFVAR_LISP ("leave-window-hook", &Vleave_window_hook /*
|
|
|
651 Not yet implemented.
|
|
|
652 */ );
|
|
|
653 Vleave_window_hook = Qnil;
|
|
|
654
|
|
|
655 DEFVAR_LISP ("enter-window-hook", &Venter_window_hook /*
|
|
|
656 Not yet implemented.
|
|
|
657 */ );
|
|
|
658 Venter_window_hook = Qnil;
|
|
|
659
|
|
1703
|
660 DEFVAR_LISP ("minibuffer-echo-wait-function",
|
|
|
661 &Vminibuffer_echo_wait_function /*
|
|
|
662 The function called by command loop when minibuffer was active and
|
|
|
663 message was displayed (text appeared in \" *Echo Area*\" buffer). It
|
|
|
664 must wait after displaying message so that user can read it. If the
|
|
|
665 variable value is `nil', the equivalent of `(sit-for 2)' is run.
|
|
|
666 */ );
|
|
|
667 Vminibuffer_echo_wait_function = Qnil;
|
|
|
668
|
|
428
|
669 #ifndef LISP_COMMAND_LOOP
|
|
|
670 DEFVAR_LISP ("top-level", &Vtop_level /*
|
|
|
671 Form to evaluate when Emacs starts up.
|
|
|
672 Useful to set before you dump a modified Emacs.
|
|
|
673 */ );
|
|
|
674 Vtop_level = Qnil;
|
|
|
675 #else
|
|
|
676 DEFVAR_LISP ("command-loop", &Vcommand_loop /*
|
|
|
677 Function or one argument to call to read and process keyboard commands.
|
|
|
678 The passed argument specifies whether or not to handle errors.
|
|
|
679 */ );
|
|
|
680 Vcommand_loop = Qnil;
|
|
|
681 #endif /* LISP_COMMAND_LOOP */
|
|
|
682 }
|
