Commit | Line | Data |
---|---|---|
284f4730 | 1 | /* Keyboard and mouse input; editor command loop. |
519a3b65 | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1992 Free Software Foundation, Inc. |
284f4730 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 1, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | /* Allow config.h to undefine symbols found here. */ | |
21 | #include <signal.h> | |
22 | ||
23 | #include "config.h" | |
24 | #include <stdio.h> | |
25 | #undef NULL | |
26 | #include "termchar.h" | |
27 | #include "termopts.h" | |
28 | #include "lisp.h" | |
29 | #include "termhooks.h" | |
30 | #include "macros.h" | |
ff11dfa1 | 31 | #include "frame.h" |
284f4730 JB |
32 | #include "window.h" |
33 | #include "commands.h" | |
34 | #include "buffer.h" | |
35 | #include "disptab.h" | |
36 | #include "keyboard.h" | |
37 | #include <setjmp.h> | |
38 | #include <errno.h> | |
39 | ||
284f4730 JB |
40 | #ifndef VMS |
41 | #include <sys/ioctl.h> | |
284f4730 JB |
42 | #endif |
43 | ||
52baf19e | 44 | #include "syssignal.h" |
6ef5b54f | 45 | #include "systty.h" |
ffd56f97 | 46 | #include "systime.h" |
52baf19e JB |
47 | |
48 | extern int errno; | |
49 | ||
284f4730 JB |
50 | #ifdef HAVE_X_WINDOWS |
51 | extern Lisp_Object Vmouse_grabbed; | |
52 | ||
53 | /* Make all keyboard buffers much bigger when using X windows. */ | |
54 | #define KBD_BUFFER_SIZE 4096 | |
55 | #else /* No X-windows, character input */ | |
56 | #define KBD_BUFFER_SIZE 256 | |
57 | #endif /* No X-windows */ | |
58 | ||
59 | /* Following definition copied from eval.c */ | |
60 | ||
61 | struct backtrace | |
62 | { | |
63 | struct backtrace *next; | |
64 | Lisp_Object *function; | |
65 | Lisp_Object *args; /* Points to vector of args. */ | |
66 | int nargs; /* length of vector. If nargs is UNEVALLED, | |
67 | args points to slot holding list of | |
68 | unevalled args */ | |
69 | char evalargs; | |
70 | }; | |
71 | ||
72 | /* Non-nil disable property on a command means | |
73 | do not execute it; call disabled-command-hook's value instead. */ | |
74 | Lisp_Object Qdisabled, Vdisabled_command_hook; | |
75 | ||
76 | #define NUM_RECENT_KEYS (100) | |
77 | int recent_keys_index; /* Index for storing next element into recent_keys */ | |
78 | int total_keys; /* Total number of elements stored into recent_keys */ | |
79 | Lisp_Object recent_keys[NUM_RECENT_KEYS]; /* Holds last 100 keystrokes */ | |
80 | ||
81 | /* Buffer holding the key that invoked the current command. */ | |
82 | Lisp_Object *this_command_keys; | |
83 | int this_command_key_count; /* Size in use. */ | |
84 | int this_command_keys_size; /* Size allocated. */ | |
85 | ||
86 | extern int minbuf_level; | |
87 | ||
88 | extern struct backtrace *backtrace_list; | |
89 | ||
90 | /* Nonzero means do menu prompting. */ | |
91 | static int menu_prompting; | |
92 | ||
93 | /* Character to see next line of menu prompt. */ | |
94 | static Lisp_Object menu_prompt_more_char; | |
95 | ||
96 | /* For longjmp to where kbd input is being done. */ | |
97 | static jmp_buf getcjmp; | |
98 | ||
99 | /* True while doing kbd input. */ | |
100 | int waiting_for_input; | |
101 | ||
102 | /* True while displaying for echoing. Delays C-g throwing. */ | |
103 | static int echoing; | |
104 | ||
105 | /* Nonzero means C-G should cause immediate error-signal. */ | |
106 | int immediate_quit; | |
107 | ||
108 | /* Character to recognize as the help char. */ | |
109 | Lisp_Object help_char; | |
110 | ||
111 | /* Form to execute when help char is typed. */ | |
112 | Lisp_Object Vhelp_form; | |
113 | ||
114 | /* Character that causes a quit. Normally C-g. | |
115 | ||
116 | If we are running on an ordinary terminal, this must be an ordinary | |
117 | ASCII char, since we want to make it our interrupt character. | |
118 | ||
119 | If we are not running on an ordinary terminal, it still needs to be | |
120 | an ordinary ASCII char. This character needs to be recognized in | |
121 | the input interrupt handler. At this point, the keystroke is | |
122 | represented as a struct input_event, while the desired quit | |
123 | character is specified as a lispy event. The mapping from struct | |
124 | input_events to lispy events cannot run in an interrupt handler, | |
125 | and the reverse mapping is difficult for anything but ASCII | |
126 | keystrokes. | |
127 | ||
128 | FOR THESE ELABORATE AND UNSATISFYING REASONS, quit_char must be an | |
129 | ASCII character. */ | |
130 | int quit_char; | |
131 | ||
132 | extern Lisp_Object current_global_map; | |
133 | extern int minibuf_level; | |
134 | ||
135 | /* Current depth in recursive edits. */ | |
136 | int command_loop_level; | |
137 | ||
138 | /* Total number of times command_loop has read a key sequence. */ | |
139 | int num_input_keys; | |
140 | ||
141 | /* Last input character read as a command. */ | |
142 | Lisp_Object last_command_char; | |
143 | ||
7d6de002 RS |
144 | /* Last input character read as a command, not counting menus |
145 | reached by the mouse. */ | |
146 | Lisp_Object last_nonmenu_event; | |
147 | ||
284f4730 JB |
148 | /* Last input character read for any purpose. */ |
149 | Lisp_Object last_input_char; | |
150 | ||
151 | /* If not Qnil, an object to be read as the next command input. */ | |
152 | Lisp_Object unread_command_char; | |
153 | ||
154 | /* Char to use as prefix when a meta character is typed in. | |
155 | This is bound on entry to minibuffer in case ESC is changed there. */ | |
156 | ||
157 | Lisp_Object meta_prefix_char; | |
158 | ||
159 | /* Last size recorded for a current buffer which is not a minibuffer. */ | |
160 | static int last_non_minibuf_size; | |
161 | ||
06ef7355 | 162 | /* Number of idle seconds before an auto-save and garbage collection. */ |
284f4730 JB |
163 | static Lisp_Object Vauto_save_timeout; |
164 | ||
165 | /* Total number of times read_char has returned. */ | |
166 | int num_input_chars; | |
167 | ||
51172b6d RS |
168 | /* Total number of times read_char has returned, outside of macros. */ |
169 | int num_nonmacro_input_chars; | |
170 | ||
284f4730 JB |
171 | /* Auto-save automatically when this many characters have been typed |
172 | since the last time. */ | |
173 | ||
174 | static int auto_save_interval; | |
175 | ||
51172b6d | 176 | /* Value of num_nonmacro_input_chars as of last auto save. */ |
284f4730 JB |
177 | |
178 | int last_auto_save; | |
179 | ||
180 | /* Last command executed by the editor command loop, not counting | |
181 | commands that set the prefix argument. */ | |
182 | ||
183 | Lisp_Object last_command; | |
184 | ||
185 | /* The command being executed by the command loop. | |
186 | Commands may set this, and the value set will be copied into last_command | |
187 | instead of the actual command. */ | |
188 | Lisp_Object this_command; | |
189 | ||
3e51c7b7 | 190 | #ifdef MULTI_FRAME |
fce33686 JB |
191 | /* The frame in which the last input event occurred, or Qmacro if the |
192 | last event came from a macro. | |
ff11dfa1 | 193 | command_loop_1 will select this frame before running the |
284f4730 JB |
194 | command bound to an event sequence, and read_key_sequence will |
195 | toss the existing prefix if the user starts typing at a | |
ff11dfa1 JB |
196 | new frame. */ |
197 | Lisp_Object Vlast_event_frame; | |
3e51c7b7 | 198 | #endif |
284f4730 | 199 | |
1113d9db JB |
200 | /* The timestamp of the last input event we received from the X server. |
201 | X Windows wants this for selection ownership. */ | |
284f4730 JB |
202 | unsigned long last_event_timestamp; |
203 | ||
204 | Lisp_Object Qself_insert_command; | |
205 | Lisp_Object Qforward_char; | |
206 | Lisp_Object Qbackward_char; | |
207 | ||
208 | /* read_key_sequence stores here the command definition of the | |
209 | key sequence that it reads. */ | |
210 | Lisp_Object read_key_sequence_cmd; | |
211 | ||
212 | /* Form to evaluate (if non-nil) when Emacs is started. */ | |
213 | Lisp_Object Vtop_level; | |
214 | ||
215 | /* User-supplied string to translate input characters through. */ | |
216 | Lisp_Object Vkeyboard_translate_table; | |
217 | ||
218 | /* Keymap mapping ASCII function key sequences onto their preferred forms. */ | |
219 | extern Lisp_Object Vfunction_key_map; | |
220 | ||
221 | /* File in which we write all commands we read. */ | |
222 | FILE *dribble; | |
223 | ||
224 | /* Nonzero if input is available. */ | |
225 | int input_pending; | |
226 | ||
227 | /* Nonzero if should obey 0200 bit in input chars as "Meta". */ | |
228 | int meta_key; | |
229 | ||
230 | extern char *pending_malloc_warning; | |
231 | ||
232 | /* Circular buffer for pre-read keyboard input. */ | |
233 | static struct input_event kbd_buffer[KBD_BUFFER_SIZE]; | |
234 | ||
235 | /* Pointer to next available character in kbd_buffer. | |
236 | If kbd_fetch_ptr == kbd_store_ptr, the buffer is empty. | |
237 | This may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the the | |
238 | next available char is in kbd_buffer[0]. */ | |
239 | static struct input_event *kbd_fetch_ptr; | |
240 | ||
241 | /* Pointer to next place to store character in kbd_buffer. This | |
242 | may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the next | |
243 | character should go in kbd_buffer[0]. */ | |
244 | static struct input_event *kbd_store_ptr; | |
245 | ||
246 | /* The above pair of variables forms a "queue empty" flag. When we | |
247 | enqueue a non-hook event, we increment kbd_write_count. When we | |
248 | dequeue a non-hook event, we increment kbd_read_count. We say that | |
249 | there is input available iff the two counters are equal. | |
250 | ||
251 | Why not just have a flag set and cleared by the enqueuing and | |
252 | dequeuing functions? Such a flag could be screwed up by interrupts | |
253 | at inopportune times. */ | |
254 | ||
255 | /* If this flag is non-zero, mouse movement events will appear in the | |
256 | input stream. If is zero, mouse movement will be ignored. */ | |
257 | int do_mouse_tracking; | |
258 | ||
259 | /* The window system handling code should set this if the mouse has | |
260 | moved since the last call to the mouse_position_hook. Calling that | |
261 | hook should clear this. Code assumes that if this is set, it can | |
262 | call mouse_position_hook to get the promised position, so don't set | |
263 | it unless you're prepared to substantiate the claim! */ | |
264 | int mouse_moved; | |
265 | ||
266 | /* True iff there is an event in kbd_buffer, or if mouse tracking is | |
267 | enabled and there is a new mouse position in the mouse movement | |
268 | buffer. Note that if this is false, that doesn't mean that there | |
269 | is readable input; all the events in the queue might be button-up | |
270 | events, and do_mouse_tracking might be off. */ | |
271 | #define EVENT_QUEUES_EMPTY \ | |
272 | ((kbd_fetch_ptr == kbd_store_ptr) && (!do_mouse_tracking || !mouse_moved)) | |
273 | ||
274 | ||
275 | /* Symbols to head events. */ | |
276 | Lisp_Object Qmouse_movement; | |
277 | ||
278 | Lisp_Object Qvscrollbar_part; | |
279 | Lisp_Object Qvslider_part; | |
280 | Lisp_Object Qvthumbup_part; | |
281 | Lisp_Object Qvthumbdown_part; | |
282 | ||
283 | Lisp_Object Qhscrollbar_part; | |
284 | Lisp_Object Qhslider_part; | |
285 | Lisp_Object Qhthumbleft_part; | |
286 | Lisp_Object Qhthumbright_part; | |
287 | ||
288 | /* Symbols to denote kinds of events. */ | |
289 | Lisp_Object Qfunction_key; | |
290 | Lisp_Object Qmouse_click; | |
291 | /* Lisp_Object Qmouse_movement; - also an event header */ | |
292 | Lisp_Object Qscrollbar_click; | |
293 | ||
294 | /* Properties of event headers. */ | |
295 | Lisp_Object Qevent_kind; | |
296 | Lisp_Object Qevent_unmodified; | |
297 | ||
298 | /* Symbols to use for non-text mouse positions. */ | |
299 | Lisp_Object Qmode_line; | |
e5d77022 | 300 | Lisp_Object Qvertical_line; |
284f4730 JB |
301 | |
302 | ||
ffd56f97 JB |
303 | /* Address (if not 0) of EMACS_TIME to zero out if a SIGIO interrupt |
304 | happens. */ | |
305 | EMACS_TIME *input_available_clear_time; | |
284f4730 JB |
306 | |
307 | /* Nonzero means use SIGIO interrupts; zero means use CBREAK mode. | |
308 | Default is 1 if INTERRUPT_INPUT is defined. */ | |
309 | int interrupt_input; | |
310 | ||
311 | /* Nonzero while interrupts are temporarily deferred during redisplay. */ | |
312 | int interrupts_deferred; | |
313 | ||
314 | /* nonzero means use ^S/^Q for flow control. */ | |
315 | int flow_control; | |
316 | ||
284f4730 JB |
317 | /* Allow m- file to inhibit use of FIONREAD. */ |
318 | #ifdef BROKEN_FIONREAD | |
319 | #undef FIONREAD | |
320 | #endif | |
321 | ||
322 | /* We are unable to use interrupts if FIONREAD is not available, | |
323 | so flush SIGIO so we won't try. */ | |
324 | #ifndef FIONREAD | |
325 | #ifdef SIGIO | |
326 | #undef SIGIO | |
327 | #endif | |
328 | #endif | |
329 | ||
330 | /* If we support X Windows, and won't get an interrupt when input | |
331 | arrives from the server, poll periodically so we can detect C-g. */ | |
332 | #ifdef HAVE_X_WINDOWS | |
333 | #ifndef SIGIO | |
334 | #define POLL_FOR_INPUT | |
335 | #endif | |
336 | #endif | |
337 | \f | |
338 | /* Global variable declarations. */ | |
339 | ||
340 | /* Function for init_keyboard to call with no args (if nonzero). */ | |
341 | void (*keyboard_init_hook) (); | |
342 | ||
343 | static int read_avail_input (); | |
344 | static void get_input_pending (); | |
345 | ||
346 | /* > 0 if we are to echo keystrokes. */ | |
347 | static int echo_keystrokes; | |
348 | ||
349 | /* Nonzero means echo each character as typed. */ | |
350 | static int immediate_echo; | |
351 | ||
352 | /* The text we're echoing in the modeline - partial key sequences, | |
353 | usually. '\0'-terminated. */ | |
354 | static char echobuf[100]; | |
355 | ||
356 | /* Where to append more text to echobuf if we want to. */ | |
357 | static char *echoptr; | |
358 | ||
359 | #define min(a,b) ((a)<(b)?(a):(b)) | |
360 | #define max(a,b) ((a)>(b)?(a):(b)) | |
361 | ||
362 | /* Install the string STR as the beginning of the string of echoing, | |
363 | so that it serves as a prompt for the next character. | |
364 | Also start echoing. */ | |
365 | ||
366 | echo_prompt (str) | |
367 | char *str; | |
368 | { | |
369 | int len = strlen (str); | |
370 | if (len > sizeof echobuf - 4) | |
371 | len = sizeof echobuf - 4; | |
372 | bcopy (str, echobuf, len + 1); | |
373 | echoptr = echobuf + len; | |
374 | ||
375 | echo (); | |
376 | } | |
377 | ||
378 | /* Add C to the echo string, if echoing is going on. | |
379 | C can be a character, which is printed prettily ("M-C-x" and all that | |
380 | jazz), or a symbol, whose name is printed. */ | |
381 | ||
382 | echo_char (c) | |
383 | Lisp_Object c; | |
384 | { | |
385 | extern char *push_key_description (); | |
386 | ||
387 | if (immediate_echo) | |
388 | { | |
389 | char *ptr = echoptr; | |
390 | ||
391 | if (ptr != echobuf) | |
392 | *ptr++ = ' '; | |
393 | ||
394 | /* If someone has passed us a composite event, use its head symbol. */ | |
395 | if (EVENT_HAS_PARAMETERS (c)) | |
396 | c = EVENT_HEAD (c); | |
397 | ||
398 | if (XTYPE (c) == Lisp_Int) | |
399 | { | |
400 | if (ptr - echobuf > sizeof echobuf - 6) | |
401 | return; | |
402 | ||
403 | ptr = push_key_description (c, ptr); | |
404 | } | |
405 | else if (XTYPE (c) == Lisp_Symbol) | |
406 | { | |
407 | struct Lisp_String *name = XSYMBOL (c)->name; | |
408 | if (((ptr - echobuf) + name->size + 4) > sizeof echobuf) | |
409 | return; | |
410 | bcopy (name->data, ptr, name->size); | |
411 | ptr += name->size; | |
412 | } | |
413 | ||
414 | if (echoptr == echobuf && c == help_char) | |
415 | { | |
416 | strcpy (ptr, " (Type ? for further options)"); | |
417 | ptr += strlen (ptr); | |
418 | } | |
419 | ||
420 | *ptr = 0; | |
421 | echoptr = ptr; | |
422 | ||
423 | echo (); | |
424 | } | |
425 | } | |
426 | ||
427 | /* Temporarily add a dash to the end of the echo string if it's not | |
428 | empty, so that it serves as a mini-prompt for the very next character. */ | |
429 | ||
430 | echo_dash () | |
431 | { | |
432 | if (!immediate_echo && echoptr == echobuf) | |
433 | return; | |
434 | ||
435 | /* Put a dash at the end of the buffer temporarily, | |
436 | but make it go away when the next character is added. */ | |
437 | echoptr[0] = '-'; | |
438 | echoptr[1] = 0; | |
439 | ||
440 | echo (); | |
441 | } | |
442 | ||
443 | /* Display the current echo string, and begin echoing if not already | |
444 | doing so. */ | |
445 | ||
446 | echo () | |
447 | { | |
448 | if (!immediate_echo) | |
449 | { | |
450 | int i; | |
451 | immediate_echo = 1; | |
452 | ||
453 | for (i = 0; i < this_command_key_count; i++) | |
454 | echo_char (this_command_keys[i]); | |
455 | echo_dash (); | |
456 | } | |
457 | ||
458 | echoing = 1; | |
459 | message1 (echobuf); | |
460 | echoing = 0; | |
461 | ||
462 | if (waiting_for_input && !NILP (Vquit_flag)) | |
463 | quit_throw_to_read_char (); | |
464 | } | |
465 | ||
466 | /* Turn off echoing, for the start of a new command. */ | |
467 | ||
468 | cancel_echoing () | |
469 | { | |
470 | immediate_echo = 0; | |
471 | echoptr = echobuf; | |
472 | } | |
473 | ||
474 | /* Return the length of the current echo string. */ | |
475 | ||
476 | static int | |
477 | echo_length () | |
478 | { | |
479 | return echoptr - echobuf; | |
480 | } | |
481 | ||
482 | /* Truncate the current echo message to its first LEN chars. | |
483 | This and echo_char get used by read_key_sequence when the user | |
ff11dfa1 | 484 | switches frames while entering a key sequence. */ |
284f4730 JB |
485 | |
486 | static void | |
487 | echo_truncate (len) | |
488 | int len; | |
489 | { | |
490 | echobuf[len] = '\0'; | |
491 | echoptr = echobuf + strlen (echobuf); | |
492 | } | |
493 | ||
494 | \f | |
495 | /* Functions for manipulating this_command_keys. */ | |
496 | static void | |
497 | add_command_key (key) | |
498 | Lisp_Object key; | |
499 | { | |
500 | if (this_command_key_count == this_command_keys_size) | |
501 | { | |
502 | this_command_keys_size *= 2; | |
503 | this_command_keys | |
504 | = (Lisp_Object *) xrealloc (this_command_keys, | |
505 | (this_command_keys_size | |
506 | * sizeof (Lisp_Object))); | |
507 | } | |
508 | this_command_keys[this_command_key_count++] = key; | |
509 | } | |
510 | \f | |
511 | Lisp_Object | |
512 | recursive_edit_1 () | |
513 | { | |
514 | int count = specpdl_ptr - specpdl; | |
515 | Lisp_Object val; | |
516 | ||
517 | if (command_loop_level > 0) | |
518 | { | |
519 | specbind (Qstandard_output, Qt); | |
520 | specbind (Qstandard_input, Qt); | |
521 | } | |
522 | ||
523 | val = command_loop (); | |
524 | if (EQ (val, Qt)) | |
525 | Fsignal (Qquit, Qnil); | |
526 | ||
527 | unbind_to (count); | |
528 | return Qnil; | |
529 | } | |
530 | ||
531 | /* When an auto-save happens, record the "time", and don't do again soon. */ | |
532 | record_auto_save () | |
533 | { | |
51172b6d | 534 | last_auto_save = num_nonmacro_input_chars; |
284f4730 JB |
535 | } |
536 | \f | |
537 | Lisp_Object recursive_edit_unwind (), command_loop (); | |
538 | ||
539 | DEFUN ("recursive-edit", Frecursive_edit, Srecursive_edit, 0, 0, "", | |
540 | "Invoke the editor command loop recursively.\n\ | |
541 | To get out of the recursive edit, a command can do `(throw 'exit nil)';\n\ | |
542 | that tells this function to return.\n\ | |
543 | Alternately, `(throw 'exit t)' makes this function signal an error.\n\ | |
544 | This function is called by the editor initialization to begin editing.") | |
545 | () | |
546 | { | |
547 | int count = specpdl_ptr - specpdl; | |
548 | Lisp_Object val; | |
549 | ||
550 | command_loop_level++; | |
551 | update_mode_lines = 1; | |
552 | ||
553 | record_unwind_protect (recursive_edit_unwind, | |
554 | (command_loop_level | |
555 | && current_buffer != XBUFFER (XWINDOW (selected_window)->buffer)) | |
556 | ? Fcurrent_buffer () | |
557 | : Qnil); | |
558 | recursive_edit_1 (); | |
559 | return unbind_to (count, Qnil); | |
560 | } | |
561 | ||
562 | Lisp_Object | |
563 | recursive_edit_unwind (buffer) | |
564 | Lisp_Object buffer; | |
565 | { | |
566 | if (!NILP (buffer)) | |
567 | Fset_buffer (buffer); | |
568 | ||
569 | command_loop_level--; | |
570 | update_mode_lines = 1; | |
571 | return Qnil; | |
572 | } | |
573 | \f | |
574 | Lisp_Object | |
575 | cmd_error (data) | |
576 | Lisp_Object data; | |
577 | { | |
578 | Lisp_Object errmsg, tail, errname, file_error; | |
579 | Lisp_Object stream; | |
580 | struct gcpro gcpro1; | |
581 | int i; | |
582 | ||
583 | Vquit_flag = Qnil; | |
584 | Vinhibit_quit = Qt; | |
585 | Vstandard_output = Qt; | |
586 | Vstandard_input = Qt; | |
587 | Vexecuting_macro = Qnil; | |
588 | echo_area_glyphs = 0; | |
589 | ||
ff11dfa1 | 590 | /* If the window system or terminal frame hasn't been initialized |
284f4730 JB |
591 | yet, or we're not interactive, it's best to dump this message out |
592 | to stderr and exit. */ | |
ff11dfa1 | 593 | if (! FRAME_MESSAGE_BUF (selected_frame) |
284f4730 JB |
594 | || noninteractive) |
595 | stream = Qexternal_debugging_output; | |
596 | else | |
597 | { | |
598 | Fdiscard_input (); | |
599 | bitch_at_user (); | |
600 | stream = Qt; | |
601 | } | |
602 | ||
603 | errname = Fcar (data); | |
604 | ||
605 | if (EQ (errname, Qerror)) | |
606 | { | |
607 | data = Fcdr (data); | |
608 | if (!CONSP (data)) data = Qnil; | |
609 | errmsg = Fcar (data); | |
610 | file_error = Qnil; | |
611 | } | |
612 | else | |
613 | { | |
614 | errmsg = Fget (errname, Qerror_message); | |
615 | file_error = Fmemq (Qfile_error, | |
616 | Fget (errname, Qerror_conditions)); | |
617 | } | |
618 | ||
619 | /* Print an error message including the data items. | |
620 | This is done by printing it into a scratch buffer | |
621 | and then making a copy of the text in the buffer. */ | |
622 | ||
623 | if (!CONSP (data)) data = Qnil; | |
624 | tail = Fcdr (data); | |
625 | GCPRO1 (tail); | |
626 | ||
627 | /* For file-error, make error message by concatenating | |
628 | all the data items. They are all strings. */ | |
629 | if (!NILP (file_error) && !NILP (tail)) | |
630 | errmsg = XCONS (tail)->car, tail = XCONS (tail)->cdr; | |
631 | ||
632 | if (XTYPE (errmsg) == Lisp_String) | |
633 | Fprinc (errmsg, stream); | |
634 | else | |
635 | write_string_1 ("peculiar error", -1, stream); | |
636 | ||
637 | for (i = 0; CONSP (tail); tail = Fcdr (tail), i++) | |
638 | { | |
639 | write_string_1 (i ? ", " : ": ", 2, stream); | |
640 | if (!NILP (file_error)) | |
641 | Fprinc (Fcar (tail), stream); | |
642 | else | |
643 | Fprin1 (Fcar (tail), stream); | |
644 | } | |
645 | UNGCPRO; | |
646 | ||
ff11dfa1 | 647 | /* If the window system or terminal frame hasn't been initialized |
284f4730 | 648 | yet, or we're in -batch mode, this error should cause Emacs to exit. */ |
ff11dfa1 | 649 | if (! FRAME_MESSAGE_BUF (selected_frame) |
284f4730 JB |
650 | || noninteractive) |
651 | { | |
652 | Fterpri (stream); | |
653 | Fkill_emacs (make_number (-1)); | |
654 | } | |
655 | ||
656 | Vquit_flag = Qnil; | |
657 | ||
658 | Vinhibit_quit = Qnil; | |
659 | return make_number (0); | |
660 | } | |
661 | \f | |
662 | Lisp_Object command_loop_1 (); | |
663 | Lisp_Object command_loop_2 (); | |
664 | Lisp_Object top_level_1 (); | |
665 | ||
666 | /* Entry to editor-command-loop. | |
667 | This level has the catches for exiting/returning to editor command loop. | |
668 | It returns nil to exit recursive edit, t to abort it. */ | |
669 | ||
670 | Lisp_Object | |
671 | command_loop () | |
672 | { | |
673 | if (command_loop_level > 0 || minibuf_level > 0) | |
674 | { | |
675 | return internal_catch (Qexit, command_loop_2, Qnil); | |
676 | } | |
677 | else | |
678 | while (1) | |
679 | { | |
680 | internal_catch (Qtop_level, top_level_1, Qnil); | |
681 | internal_catch (Qtop_level, command_loop_2, Qnil); | |
682 | ||
683 | /* End of file in -batch run causes exit here. */ | |
684 | if (noninteractive) | |
685 | Fkill_emacs (Qt); | |
686 | } | |
687 | } | |
688 | ||
689 | /* Here we catch errors in execution of commands within the | |
690 | editing loop, and reenter the editing loop. | |
691 | When there is an error, cmd_error runs and returns a non-nil | |
692 | value to us. A value of nil means that cmd_loop_1 itself | |
693 | returned due to end of file (or end of kbd macro). */ | |
694 | ||
695 | Lisp_Object | |
696 | command_loop_2 () | |
697 | { | |
698 | register Lisp_Object val; | |
699 | ||
700 | do | |
701 | val = internal_condition_case (command_loop_1, Qerror, cmd_error); | |
702 | while (!NILP (val)); | |
703 | ||
704 | return Qnil; | |
705 | } | |
706 | ||
707 | Lisp_Object | |
708 | top_level_2 () | |
709 | { | |
710 | return Feval (Vtop_level); | |
711 | } | |
712 | ||
713 | Lisp_Object | |
714 | top_level_1 () | |
715 | { | |
716 | /* On entry to the outer level, run the startup file */ | |
717 | if (!NILP (Vtop_level)) | |
718 | internal_condition_case (top_level_2, Qerror, cmd_error); | |
719 | else if (!NILP (Vpurify_flag)) | |
720 | message ("Bare impure Emacs (standard Lisp code not loaded)"); | |
721 | else | |
722 | message ("Bare Emacs (standard Lisp code not loaded)"); | |
723 | return Qnil; | |
724 | } | |
725 | ||
726 | DEFUN ("top-level", Ftop_level, Stop_level, 0, 0, "", | |
727 | "Exit all recursive editing levels.") | |
728 | () | |
729 | { | |
730 | Fthrow (Qtop_level, Qnil); | |
731 | } | |
732 | ||
733 | DEFUN ("exit-recursive-edit", Fexit_recursive_edit, Sexit_recursive_edit, 0, 0, "", | |
734 | "Exit from the innermost recursive edit or minibuffer.") | |
735 | () | |
736 | { | |
737 | if (command_loop_level > 0 || minibuf_level > 0) | |
738 | Fthrow (Qexit, Qnil); | |
739 | ||
740 | error ("No recursive edit is in progress"); | |
741 | } | |
742 | ||
743 | DEFUN ("abort-recursive-edit", Fabort_recursive_edit, Sabort_recursive_edit, 0, 0, "", | |
744 | "Abort the command that requested this recursive edit or minibuffer input.") | |
745 | () | |
746 | { | |
747 | if (command_loop_level > 0 || minibuf_level > 0) | |
748 | Fthrow (Qexit, Qt); | |
749 | ||
750 | error ("No recursive edit is in progress"); | |
751 | } | |
752 | \f | |
753 | /* This is the actual command reading loop, | |
754 | sans error-handling encapsulation. */ | |
755 | ||
756 | Lisp_Object Fcommand_execute (); | |
757 | static int read_key_sequence (); | |
758 | ||
759 | Lisp_Object | |
760 | command_loop_1 () | |
761 | { | |
762 | Lisp_Object cmd; | |
763 | int lose; | |
764 | int nonundocount; | |
765 | Lisp_Object keybuf[30]; | |
766 | int i; | |
767 | int no_redisplay; | |
768 | int no_direct; | |
769 | ||
770 | Vprefix_arg = Qnil; | |
771 | waiting_for_input = 0; | |
772 | cancel_echoing (); | |
773 | ||
774 | /* Don't clear out last_command at the beginning of a macro. */ | |
775 | if (XTYPE (Vexecuting_macro) != Lisp_String) | |
776 | last_command = Qt; | |
777 | ||
778 | nonundocount = 0; | |
779 | no_redisplay = 0; | |
780 | this_command_key_count = 0; | |
781 | ||
782 | while (1) | |
783 | { | |
784 | /* Install chars successfully executed in kbd macro. */ | |
785 | ||
786 | if (defining_kbd_macro && NILP (Vprefix_arg)) | |
787 | finalize_kbd_macro_chars (); | |
788 | ||
789 | /* Make sure the current window's buffer is selected. */ | |
790 | if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) | |
791 | set_buffer_internal (XBUFFER (XWINDOW (selected_window)->buffer)); | |
792 | ||
793 | /* Display any malloc warning that just came out. Use while because | |
794 | displaying one warning can cause another. */ | |
795 | ||
796 | while (pending_malloc_warning) | |
797 | display_malloc_warning (); | |
798 | ||
799 | no_direct = 0; | |
800 | ||
801 | /* If minibuffer on and echo area in use, | |
802 | wait 2 sec and redraw minibufer. */ | |
803 | ||
804 | if (minibuf_level && echo_area_glyphs) | |
805 | { | |
f1bed6d8 RS |
806 | /* Bind inhibit-quit to t so that C-g gets read in |
807 | rather than quitting back to the minibuffer. */ | |
808 | int count = specpdl_ptr - specpdl; | |
809 | specbind (Qinhibit_quit, Qt); | |
284f4730 | 810 | Fsit_for (make_number (2), Qnil, Qnil); |
f1bed6d8 RS |
811 | unbind_to (count); |
812 | ||
284f4730 JB |
813 | echo_area_glyphs = 0; |
814 | no_direct = 1; | |
815 | if (!NILP (Vquit_flag)) | |
816 | { | |
817 | Vquit_flag = Qnil; | |
818 | unread_command_char = make_number (quit_char); | |
819 | } | |
820 | } | |
821 | ||
822 | #ifdef C_ALLOCA | |
823 | alloca (0); /* Cause a garbage collection now */ | |
824 | /* Since we can free the most stuff here. */ | |
825 | #endif /* C_ALLOCA */ | |
826 | ||
827 | /* Read next key sequence; i gets its length. */ | |
828 | i = read_key_sequence (keybuf, (sizeof keybuf / sizeof (keybuf[0])), 0); | |
829 | ||
830 | ++num_input_keys; | |
831 | ||
ff11dfa1 JB |
832 | #ifdef MULTI_FRAME |
833 | /* Select the frame that the key sequence came from. */ | |
834 | if (XTYPE (Vlast_event_frame) == Lisp_Frame | |
835 | && XFRAME (Vlast_event_frame) != selected_frame) | |
836 | Fselect_frame (Vlast_event_frame, Qnil); | |
284f4730 JB |
837 | #endif |
838 | ||
839 | /* Now we have read a key sequence of length I, | |
840 | or else I is 0 and we found end of file. */ | |
841 | ||
842 | if (i == 0) /* End of file -- happens only in */ | |
843 | return Qnil; /* a kbd macro, at the end. */ | |
844 | ||
284f4730 JB |
845 | last_command_char = keybuf[i - 1]; |
846 | ||
847 | cmd = read_key_sequence_cmd; | |
848 | if (!NILP (Vexecuting_macro)) | |
849 | { | |
850 | if (!NILP (Vquit_flag)) | |
851 | { | |
852 | Vexecuting_macro = Qt; | |
853 | QUIT; /* Make some noise. */ | |
854 | /* Will return since macro now empty. */ | |
855 | } | |
856 | } | |
857 | ||
858 | /* Do redisplay processing after this command except in special | |
859 | cases identified below that set no_redisplay to 1. */ | |
860 | no_redisplay = 0; | |
861 | ||
862 | /* Execute the command. */ | |
863 | ||
864 | if (NILP (cmd)) | |
865 | { | |
866 | /* nil means key is undefined. */ | |
867 | bitch_at_user (); | |
868 | defining_kbd_macro = 0; | |
869 | update_mode_lines = 1; | |
870 | Vprefix_arg = Qnil; | |
871 | } | |
872 | else | |
873 | { | |
874 | this_command = cmd; | |
875 | if (NILP (Vprefix_arg) && ! no_direct) | |
876 | { | |
877 | /* Recognize some common commands in common situations and | |
878 | do them directly. */ | |
879 | if (EQ (cmd, Qforward_char) && point < ZV) | |
880 | { | |
881 | struct Lisp_Vector *dp | |
882 | = window_display_table (XWINDOW (selected_window)); | |
883 | lose = FETCH_CHAR (point); | |
884 | SET_PT (point + 1); | |
885 | if (((dp == 0 && lose >= 040 && lose < 0177) | |
886 | || | |
887 | (dp && (XTYPE (dp->contents[lose]) != Lisp_String | |
888 | || XSTRING (dp->contents[lose])->size == sizeof (GLYPH)))) | |
284f4730 JB |
889 | && (XFASTINT (XWINDOW (selected_window)->last_modified) |
890 | >= MODIFF) | |
891 | && (XFASTINT (XWINDOW (selected_window)->last_point) | |
892 | == point - 1) | |
893 | && !windows_or_buffers_changed | |
894 | && EQ (current_buffer->selective_display, Qnil) | |
895 | && !detect_input_pending () | |
896 | && NILP (Vexecuting_macro)) | |
897 | no_redisplay = direct_output_forward_char (1); | |
898 | goto directly_done; | |
899 | } | |
900 | else if (EQ (cmd, Qbackward_char) && point > BEGV) | |
901 | { | |
902 | struct Lisp_Vector *dp | |
903 | = window_display_table (XWINDOW (selected_window)); | |
904 | SET_PT (point - 1); | |
905 | lose = FETCH_CHAR (point); | |
906 | if (((dp == 0 && lose >= 040 && lose < 0177) | |
907 | || | |
908 | (dp && (XTYPE (dp->contents[lose]) != Lisp_String | |
909 | || XSTRING (dp->contents[lose])->size == sizeof (GLYPH)))) | |
284f4730 JB |
910 | && (XFASTINT (XWINDOW (selected_window)->last_modified) |
911 | >= MODIFF) | |
912 | && (XFASTINT (XWINDOW (selected_window)->last_point) | |
913 | == point + 1) | |
914 | && !windows_or_buffers_changed | |
915 | && EQ (current_buffer->selective_display, Qnil) | |
916 | && !detect_input_pending () | |
917 | && NILP (Vexecuting_macro)) | |
918 | no_redisplay = direct_output_forward_char (-1); | |
919 | goto directly_done; | |
920 | } | |
921 | else if (EQ (cmd, Qself_insert_command) | |
922 | /* Try this optimization only on ascii keystrokes. */ | |
923 | && XTYPE (last_command_char) == Lisp_Int) | |
924 | { | |
925 | unsigned char c = XINT (last_command_char); | |
926 | ||
927 | if (NILP (Vexecuting_macro) && | |
928 | !EQ (minibuf_window, selected_window)) | |
929 | { | |
930 | if (!nonundocount || nonundocount >= 20) | |
931 | { | |
932 | Fundo_boundary (); | |
933 | nonundocount = 0; | |
934 | } | |
935 | nonundocount++; | |
936 | } | |
937 | lose = (XFASTINT (XWINDOW (selected_window)->last_modified) | |
938 | < MODIFF) | |
939 | || (XFASTINT (XWINDOW (selected_window)->last_point) | |
940 | != point) | |
941 | || MODIFF <= current_buffer->save_modified | |
942 | || windows_or_buffers_changed | |
943 | || !EQ (current_buffer->selective_display, Qnil) | |
944 | || detect_input_pending () | |
945 | || !NILP (Vexecuting_macro); | |
946 | if (internal_self_insert (c, 0)) | |
947 | { | |
948 | lose = 1; | |
949 | nonundocount = 0; | |
950 | } | |
951 | if (!lose && | |
952 | (point == ZV || FETCH_CHAR (point) == '\n')) | |
953 | { | |
954 | struct Lisp_Vector *dp | |
955 | = window_display_table (XWINDOW (selected_window)); | |
956 | ||
957 | if (dp == 0 || XTYPE (dp->contents[c]) != Lisp_String) | |
958 | no_redisplay = direct_output_for_insert (c); | |
959 | else if (XSTRING (dp->contents[c])->size | |
960 | == sizeof (GLYPH)) | |
961 | no_redisplay = | |
962 | direct_output_for_insert (*(GLYPH *)XSTRING (dp->contents[c])->data); | |
963 | } | |
964 | goto directly_done; | |
965 | } | |
966 | } | |
967 | ||
968 | /* Here for a command that isn't executed directly */ | |
969 | ||
970 | nonundocount = 0; | |
971 | if (NILP (Vprefix_arg)) | |
972 | Fundo_boundary (); | |
973 | Fcommand_execute (cmd, Qnil); | |
974 | ||
284f4730 | 975 | } |
a764a753 | 976 | directly_done: ; |
284f4730 JB |
977 | |
978 | /* If there is a prefix argument, | |
979 | 1) We don't want last_command to be ``universal-argument'' | |
980 | (that would be dumb), so don't set last_command, | |
981 | 2) we want to leave echoing on so that the prefix will be | |
982 | echoed as part of this key sequence, so don't call | |
983 | cancel_echoing, and | |
984 | 3) we want to leave this_command_key_count non-zero, so that | |
985 | read_char will realize that it is re-reading a character, and | |
986 | not echo it a second time. */ | |
987 | if (NILP (Vprefix_arg)) | |
988 | { | |
989 | last_command = this_command; | |
990 | cancel_echoing (); | |
991 | this_command_key_count = 0; | |
992 | } | |
993 | } | |
994 | } | |
995 | \f | |
996 | /* Number of seconds between polling for input. */ | |
997 | int polling_period; | |
998 | ||
999 | /* Nonzero means polling for input is temporarily suppresed. */ | |
1000 | int poll_suppress_count; | |
1001 | ||
1002 | #ifdef POLL_FOR_INPUT | |
1003 | int polling_for_input; | |
1004 | ||
1005 | /* Handle an alarm once each second and read pending input | |
1006 | so as to handle a C-g if it comces in. */ | |
1007 | ||
1008 | SIGTYPE | |
1009 | input_poll_signal () | |
1010 | { | |
1011 | #ifdef HAVE_X_WINDOWS | |
1012 | extern int x_input_blocked; | |
1013 | if (x_input_blocked == 0) | |
1014 | #endif | |
1015 | if (!waiting_for_input) | |
1016 | read_avail_input (0); | |
1017 | signal (SIGALRM, input_poll_signal); | |
1018 | alarm (polling_period); | |
1019 | } | |
1020 | ||
1021 | #endif | |
1022 | ||
1023 | /* Begin signals to poll for input, if they are appropriate. | |
1024 | This function is called unconditionally from various places. */ | |
1025 | ||
1026 | start_polling () | |
1027 | { | |
1028 | #ifdef POLL_FOR_INPUT | |
1029 | if (read_socket_hook) | |
1030 | { | |
1031 | poll_suppress_count--; | |
1032 | if (poll_suppress_count == 0) | |
1033 | { | |
1034 | signal (SIGALRM, input_poll_signal); | |
1035 | polling_for_input = 1; | |
1036 | alarm (polling_period); | |
1037 | } | |
1038 | } | |
1039 | #endif | |
1040 | } | |
1041 | ||
1042 | /* Turn off polling. */ | |
1043 | ||
1044 | stop_polling () | |
1045 | { | |
1046 | #ifdef POLL_FOR_INPUT | |
1047 | if (read_socket_hook) | |
1048 | { | |
1049 | if (poll_suppress_count == 0) | |
1050 | { | |
1051 | polling_for_input = 0; | |
1052 | alarm (0); | |
1053 | } | |
1054 | poll_suppress_count++; | |
1055 | } | |
1056 | #endif | |
1057 | } | |
1058 | \f | |
1059 | /* Input of single characters from keyboard */ | |
1060 | ||
1061 | Lisp_Object print_help (); | |
1062 | static Lisp_Object kbd_buffer_get_event (); | |
1063 | ||
1064 | /* read a character from the keyboard; call the redisplay if needed */ | |
1065 | /* commandflag 0 means do not do auto-saving, but do do redisplay. | |
1066 | -1 means do not do redisplay, but do do autosaving. | |
1067 | 1 means do both. */ | |
1068 | ||
7d6de002 RS |
1069 | /* The arguments MAPS and NMAPS are for menu prompting. |
1070 | MAPS is an array of keymaps; NMAPS is the length of MAPS. | |
1071 | ||
1072 | PREV_EVENT is the previous input event, or nil if we are reading | |
1073 | the first event of a key sequence. | |
1074 | ||
1075 | If we use a mouse menu to read the input, we store 1 into *USED_MOUSE_MENU. | |
1076 | Otherwise we store 0 there. */ | |
1077 | ||
284f4730 | 1078 | Lisp_Object |
7d6de002 | 1079 | read_char (commandflag, nmaps, maps, prev_event, used_mouse_menu) |
284f4730 | 1080 | int commandflag; |
7d6de002 RS |
1081 | int nmaps; |
1082 | Lisp_Object *maps; | |
1083 | Lisp_Object prev_event; | |
1084 | int *used_mouse_menu; | |
284f4730 JB |
1085 | { |
1086 | register Lisp_Object c; | |
1087 | int count; | |
1088 | jmp_buf save_jump; | |
1089 | ||
1090 | if (!NILP (unread_command_char)) | |
1091 | { | |
1092 | c = unread_command_char; | |
1093 | unread_command_char = Qnil; | |
1094 | ||
284f4730 JB |
1095 | if (this_command_key_count == 0) |
1096 | goto reread_first; | |
1097 | else | |
1098 | goto reread; | |
1099 | } | |
1100 | ||
1101 | if (!NILP (Vexecuting_macro)) | |
1102 | { | |
fce33686 JB |
1103 | /* We set this to Qmacro; since that's not a frame, nobody will |
1104 | try to switch frames on us, and the selected window will | |
1105 | remain unchanged. | |
1106 | ||
1107 | Since this event came from a macro, it would be misleading to | |
1108 | leave Vlast_event_frame set to whereever the last real event | |
1109 | came from. Normally, command_loop_1 selects | |
1110 | Vlast_event_frame after each command is read, but events read | |
1111 | from a macro should never cause a new frame to be selected. */ | |
1112 | Vlast_event_frame = Qmacro; | |
1113 | ||
284f4730 JB |
1114 | if (executing_macro_index >= Flength (Vexecuting_macro)) |
1115 | { | |
1116 | XSET (c, Lisp_Int, -1); | |
1117 | return c; | |
1118 | } | |
1119 | ||
1120 | c = Faref (Vexecuting_macro, make_number (executing_macro_index)); | |
1121 | executing_macro_index++; | |
1122 | ||
1123 | goto from_macro; | |
1124 | } | |
1125 | ||
1126 | /* Save outer setjmp data, in case called recursively. */ | |
f76475ad | 1127 | save_getcjmp (save_jump); |
284f4730 JB |
1128 | |
1129 | stop_polling (); | |
1130 | ||
1131 | if (commandflag >= 0 && !input_pending && !detect_input_pending ()) | |
1132 | redisplay (); | |
1133 | ||
1134 | if (_setjmp (getcjmp)) | |
1135 | { | |
1136 | XSET (c, Lisp_Int, quit_char); | |
ff11dfa1 JB |
1137 | #ifdef MULTI_FRAME |
1138 | XSET (Vlast_event_frame, Lisp_Frame, selected_frame); | |
519a3b65 | 1139 | #endif |
284f4730 | 1140 | |
284f4730 JB |
1141 | goto non_reread; |
1142 | } | |
1143 | ||
1144 | /* Message turns off echoing unless more keystrokes turn it on again. */ | |
1145 | if (echo_area_glyphs && *echo_area_glyphs && echo_area_glyphs != echobuf) | |
1146 | cancel_echoing (); | |
1147 | else | |
1148 | /* If already echoing, continue. */ | |
1149 | echo_dash (); | |
1150 | ||
1151 | /* If in middle of key sequence and minibuffer not active, | |
1152 | start echoing if enough time elapses. */ | |
1153 | if (minibuf_level == 0 && !immediate_echo && this_command_key_count > 0 | |
1154 | && echo_keystrokes > 0 | |
1155 | && (echo_area_glyphs == 0 || *echo_area_glyphs == 0)) | |
1156 | { | |
1157 | Lisp_Object tem0; | |
1158 | ||
7d6de002 RS |
1159 | /* After a mouse event, start echoing right away. |
1160 | This is because we are probably about to display a menu, | |
1161 | and we don't want to delay before doing so. */ | |
1162 | if (XTYPE (prev_event) == Lisp_Cons) | |
284f4730 | 1163 | echo (); |
7d6de002 RS |
1164 | else |
1165 | { | |
1166 | tem0 = sit_for (echo_keystrokes, 0, 1, 1); | |
1167 | if (EQ (tem0, Qt)) | |
1168 | echo (); | |
1169 | } | |
284f4730 JB |
1170 | } |
1171 | ||
1172 | /* Maybe auto save due to number of keystrokes or idle time. */ | |
1173 | ||
1174 | if (commandflag != 0 | |
1175 | && auto_save_interval > 0 | |
51172b6d | 1176 | && num_nonmacro_input_chars - last_auto_save > max (auto_save_interval, 20) |
284f4730 JB |
1177 | && !detect_input_pending ()) |
1178 | { | |
1179 | jmp_buf temp; | |
1180 | save_getcjmp (temp); | |
1181 | Fdo_auto_save (Qnil, Qnil); | |
1182 | restore_getcjmp (temp); | |
1183 | } | |
1184 | ||
7d6de002 RS |
1185 | /* Try reading a character via menu prompting. |
1186 | Try this before the sit-for, because the sit-for | |
1187 | would do the wrong thing if we are supposed to do | |
1188 | menu prompting. */ | |
1189 | c = Qnil; | |
1190 | if (INTERACTIVE && !NILP (prev_event)) | |
1191 | c = read_char_menu_prompt (nmaps, maps, prev_event, used_mouse_menu); | |
1192 | ||
284f4730 JB |
1193 | /* Slow down auto saves logarithmically in size of current buffer, |
1194 | and garbage collect while we're at it. */ | |
7d6de002 RS |
1195 | if (NILP (c)) |
1196 | { | |
1197 | int delay_level, buffer_size; | |
1198 | ||
1199 | if (! MINI_WINDOW_P (XWINDOW (selected_window))) | |
1200 | last_non_minibuf_size = Z - BEG; | |
1201 | buffer_size = (last_non_minibuf_size >> 8) + 1; | |
1202 | delay_level = 0; | |
1203 | while (buffer_size > 64) | |
1204 | delay_level++, buffer_size -= buffer_size >> 2; | |
1205 | if (delay_level < 4) delay_level = 4; | |
1206 | /* delay_level is 4 for files under around 50k, 7 at 100k, | |
1207 | 9 at 200k, 11 at 300k, and 12 at 500k. It is 15 at 1 meg. */ | |
1208 | ||
1209 | /* Auto save if enough time goes by without input. */ | |
1210 | if (commandflag != 0 | |
51172b6d | 1211 | && num_nonmacro_input_chars > last_auto_save |
7d6de002 RS |
1212 | && XTYPE (Vauto_save_timeout) == Lisp_Int |
1213 | && XINT (Vauto_save_timeout) > 0) | |
1214 | { | |
1215 | Lisp_Object tem0; | |
1216 | int delay = delay_level * XFASTINT (Vauto_save_timeout) / 4; | |
1217 | tem0 = sit_for (delay, 0, 1, 1); | |
1218 | if (EQ (tem0, Qt)) | |
1219 | { | |
1220 | jmp_buf temp; | |
1221 | save_getcjmp (temp); | |
1222 | Fdo_auto_save (Qnil, Qnil); | |
1223 | restore_getcjmp (temp); | |
1224 | ||
1225 | /* If we have auto-saved and there is still no input | |
1226 | available, garbage collect if there has been enough | |
1227 | consing going on to make it worthwhile. */ | |
1228 | if (!detect_input_pending () | |
1229 | && consing_since_gc > gc_cons_threshold / 2) | |
1230 | Fgarbage_collect (); | |
1231 | } | |
1232 | } | |
1233 | } | |
284f4730 JB |
1234 | |
1235 | /* Actually read a character, waiting if necessary. */ | |
7d6de002 RS |
1236 | if (NILP (c)) |
1237 | c = kbd_buffer_get_event (); | |
284f4730 JB |
1238 | |
1239 | if (NILP (c)) | |
1240 | abort (); /* Don't think this can happen. */ | |
1241 | ||
284f4730 | 1242 | /* Terminate Emacs in batch mode if at eof. */ |
7d6de002 | 1243 | if (noninteractive && XTYPE (c) == Lisp_Int && XINT (c) < 0) |
284f4730 JB |
1244 | Fkill_emacs (make_number (1)); |
1245 | ||
1246 | non_reread: | |
1247 | ||
f76475ad | 1248 | restore_getcjmp (save_jump); |
284f4730 JB |
1249 | |
1250 | start_polling (); | |
1251 | ||
1252 | echo_area_glyphs = 0; | |
1253 | ||
1254 | /* Handle things that only apply to characters. */ | |
1255 | if (XTYPE (c) == Lisp_Int) | |
1256 | { | |
1257 | /* If kbd_buffer_get_event gave us an EOF, return that. */ | |
1258 | if (XINT (c) < 0) | |
1259 | return c; | |
1260 | ||
1261 | /* Strip the high bits, and maybe the meta bit too. */ | |
1262 | XSETINT (c, c & (meta_key ? 0377 : 0177)); | |
1263 | ||
1264 | if (XTYPE (Vkeyboard_translate_table) == Lisp_String | |
1265 | && XSTRING (Vkeyboard_translate_table)->size > XINT (c)) | |
1266 | XSETINT (c, XSTRING (Vkeyboard_translate_table)->data[c]); | |
1267 | } | |
1268 | ||
1269 | total_keys++; | |
1270 | recent_keys[recent_keys_index] = c; | |
1271 | if (++recent_keys_index >= (sizeof (recent_keys)/sizeof(recent_keys[0]))) | |
1272 | recent_keys_index = 0; | |
1273 | ||
1274 | /* Write c to the dribble file. If c is a lispy event, write | |
1275 | the event's symbol to the dribble file, in <brackets>. Bleaugh. | |
1276 | If you, dear reader, have a better idea, you've got the source. :-) */ | |
1277 | if (dribble) | |
1278 | { | |
1279 | if (XTYPE (c) == Lisp_Int) | |
1280 | putc (c, dribble); | |
1281 | else | |
1282 | { | |
1283 | Lisp_Object dribblee = c; | |
1284 | ||
1285 | /* If it's a structured event, take the event header. */ | |
1286 | if (EVENT_HAS_PARAMETERS (dribblee)) | |
1287 | dribblee = EVENT_HEAD (dribblee); | |
1288 | ||
1289 | if (XTYPE (c) == Lisp_Symbol) | |
1290 | { | |
1291 | putc ('<', dribble); | |
1292 | fwrite (XSYMBOL (c)->name->data, sizeof (char), | |
1293 | XSYMBOL (c)->name->size, | |
1294 | dribble); | |
1295 | putc ('>', dribble); | |
1296 | } | |
1297 | } | |
1298 | ||
1299 | fflush (dribble); | |
1300 | } | |
1301 | ||
1302 | store_kbd_macro_char (c); | |
1303 | ||
51172b6d RS |
1304 | num_nonmacro_input_chars++; |
1305 | ||
284f4730 JB |
1306 | from_macro: |
1307 | reread_first: | |
1308 | echo_char (c); | |
1309 | ||
1310 | /* Record this character as part of the current key. */ | |
1311 | add_command_key (c); | |
1312 | ||
1313 | /* Re-reading in the middle of a command */ | |
1314 | reread: | |
1315 | last_input_char = c; | |
1316 | num_input_chars++; | |
1317 | ||
1318 | /* Process the help character specially if enabled */ | |
1319 | if (EQ (c, help_char) && !NILP (Vhelp_form)) | |
1320 | { | |
1321 | Lisp_Object tem0; | |
1322 | count = specpdl_ptr - specpdl; | |
1323 | ||
1324 | record_unwind_protect (Fset_window_configuration, | |
1325 | Fcurrent_window_configuration (Qnil)); | |
1326 | ||
1327 | tem0 = Feval (Vhelp_form); | |
1328 | if (XTYPE (tem0) == Lisp_String) | |
1329 | internal_with_output_to_temp_buffer ("*Help*", print_help, tem0); | |
1330 | ||
1331 | cancel_echoing (); | |
1332 | c = read_char (0); | |
ff11dfa1 | 1333 | /* Remove the help from the frame */ |
284f4730 JB |
1334 | unbind_to (count, Qnil); |
1335 | redisplay (); | |
1336 | if (EQ (c, make_number (040))) | |
1337 | { | |
1338 | cancel_echoing (); | |
7d6de002 | 1339 | c = read_char (0, 0, 0, Qnil, 0); |
284f4730 JB |
1340 | } |
1341 | } | |
1342 | ||
1343 | return c; | |
1344 | } | |
1345 | ||
1346 | Lisp_Object | |
1347 | print_help (object) | |
1348 | Lisp_Object object; | |
1349 | { | |
1350 | Fprinc (object, Qnil); | |
1351 | return Qnil; | |
1352 | } | |
1353 | ||
1354 | /* Copy out or in the info on where C-g should throw to. | |
1355 | This is used when running Lisp code from within get_char, | |
1356 | in case get_char is called recursively. | |
1357 | See read_process_output. */ | |
1358 | ||
1359 | save_getcjmp (temp) | |
1360 | jmp_buf temp; | |
1361 | { | |
1362 | bcopy (getcjmp, temp, sizeof getcjmp); | |
1363 | } | |
1364 | ||
1365 | restore_getcjmp (temp) | |
1366 | jmp_buf temp; | |
1367 | { | |
1368 | bcopy (temp, getcjmp, sizeof getcjmp); | |
1369 | } | |
1370 | ||
1371 | \f | |
1372 | /* Low level keyboard/mouse input. | |
1373 | kbd_buffer_store_event places events in kbd_buffer, and | |
1374 | kbd_buffer_get_event retrieves them. | |
1375 | mouse_moved indicates when the mouse has moved again, and | |
1376 | *mouse_position_hook provides the mouse position. */ | |
1377 | ||
1378 | /* Set this for debugging, to have a way to get out */ | |
1379 | int stop_character; | |
1380 | ||
ff11dfa1 | 1381 | extern int frame_garbaged; |
284f4730 JB |
1382 | |
1383 | /* Return true iff there are any events in the queue that read-char | |
1384 | would return. If this returns false, a read-char would block. */ | |
1385 | static int | |
1386 | readable_events () | |
1387 | { | |
1388 | struct input_event *ep; | |
1389 | ||
1390 | if (EVENT_QUEUES_EMPTY) | |
1391 | return 0; | |
1392 | ||
1393 | if (do_mouse_tracking) | |
1394 | return 1; | |
1395 | ||
1396 | /* Mouse tracking is disabled, so we need to actually scan the | |
1397 | input queue to see if any events are currently readable. */ | |
1398 | for (ep = kbd_fetch_ptr; ep != kbd_store_ptr; ep++) | |
1399 | { | |
1400 | if (ep == kbd_buffer + KBD_BUFFER_SIZE) | |
1401 | ep = kbd_buffer; | |
1402 | ||
1403 | /* Skip button-up events. */ | |
1404 | if ((ep->kind == mouse_click || ep->kind == scrollbar_click) | |
1405 | && (ep->modifiers & up_modifier)) | |
1406 | continue; | |
1407 | ||
1408 | return 1; | |
1409 | } | |
1410 | ||
1411 | return 0; | |
1412 | } | |
1413 | ||
1414 | ||
1415 | /* Restore mouse tracking enablement. See Ftrack_mouse for the only use | |
1416 | of this function. */ | |
1417 | static Lisp_Object | |
1418 | tracking_off (old_value) | |
1419 | Lisp_Object old_value; | |
1420 | { | |
1421 | if (! XFASTINT (old_value)) | |
1422 | { | |
1423 | do_mouse_tracking = 0; | |
1424 | ||
1425 | /* Redisplay may have been preempted because there was input | |
1426 | available, and it assumes it will be called again after the | |
1427 | input has been processed. If the only input available was | |
1428 | the sort that we have just disabled, then we need to call | |
1429 | redisplay. */ | |
1430 | if (!readable_events ()) | |
1431 | { | |
1432 | redisplay_preserve_echo_area (); | |
1433 | get_input_pending (&input_pending); | |
1434 | } | |
1435 | } | |
1436 | } | |
1437 | ||
1438 | DEFUN ("track-mouse", Ftrack_mouse, Strack_mouse, 0, UNEVALLED, 0, | |
1439 | "Evaluate BODY with mouse movement and button release events enabled.\n\ | |
3371bdfc RS |
1440 | Within a `track-mouse', mouse motion and button releases generate input\n\ |
1441 | events that you can read with `read-event'.\n\ | |
1442 | Normally, these occurrences don't generate events.") | |
284f4730 JB |
1443 | (args) |
1444 | Lisp_Object args; | |
1445 | { | |
1446 | int count = specpdl_ptr - specpdl; | |
1447 | Lisp_Object val; | |
1448 | ||
1449 | XSET (val, Lisp_Int, do_mouse_tracking); | |
1450 | record_unwind_protect (tracking_off, val); | |
1451 | ||
1452 | do_mouse_tracking = 1; | |
1453 | ||
1454 | val = Fprogn (args); | |
1455 | return unbind_to (count, val); | |
1456 | } | |
1457 | ||
1458 | /* Store an event obtained at interrupt level into kbd_buffer, fifo */ | |
1459 | ||
1460 | void | |
1461 | kbd_buffer_store_event (event) | |
1462 | register struct input_event *event; | |
1463 | { | |
1464 | if (event->kind == no_event) | |
1465 | abort (); | |
1466 | ||
1467 | if (event->kind == ascii_keystroke) | |
1468 | { | |
1469 | register int c = XFASTINT (event->code) & 0377; | |
1470 | ||
1471 | if (c == quit_char | |
1472 | || ((c == (0200 | quit_char)) && !meta_key)) | |
1473 | { | |
3e51c7b7 JB |
1474 | extern SIGTYPE interrupt_signal (); |
1475 | ||
1476 | #ifdef MULTI_FRAME | |
284f4730 | 1477 | /* If this results in a quit_char being returned to Emacs as |
ff11dfa1 | 1478 | input, set last-event-frame properly. If this doesn't |
284f4730 | 1479 | get returned to Emacs as an event, the next event read |
ff11dfa1 | 1480 | will set Vlast_event_frame again, so this is safe to do. */ |
ff11dfa1 | 1481 | Vlast_event_frame = FRAME_FOCUS_FRAME (event->frame); |
3e51c7b7 JB |
1482 | #endif |
1483 | ||
ffd56f97 | 1484 | last_event_timestamp = event->timestamp; |
284f4730 JB |
1485 | interrupt_signal (); |
1486 | return; | |
1487 | } | |
1488 | ||
1489 | if (c && c == stop_character) | |
1490 | { | |
1491 | sys_suspend (); | |
1492 | return; | |
1493 | } | |
1494 | ||
1495 | XSET (event->code, Lisp_Int, c); | |
1496 | } | |
1497 | ||
1498 | if (kbd_store_ptr - kbd_buffer == KBD_BUFFER_SIZE) | |
1499 | kbd_store_ptr = kbd_buffer; | |
1500 | ||
1501 | /* Don't let the very last slot in the buffer become full, | |
1502 | since that would make the two pointers equal, | |
1503 | and that is indistinguishable from an empty buffer. | |
1504 | Discard the event if it would fill the last slot. */ | |
1505 | if (kbd_fetch_ptr - 1 != kbd_store_ptr) | |
1506 | { | |
1507 | kbd_store_ptr->kind = event->kind; | |
1508 | kbd_store_ptr->code = event->code; | |
1509 | kbd_store_ptr->part = event->part; | |
ff11dfa1 | 1510 | kbd_store_ptr->frame = event->frame; |
284f4730 JB |
1511 | kbd_store_ptr->modifiers = event->modifiers; |
1512 | kbd_store_ptr->x = event->x; | |
1513 | kbd_store_ptr->y = event->y; | |
1514 | kbd_store_ptr->timestamp = event->timestamp; | |
1515 | ||
1516 | kbd_store_ptr++; | |
1517 | } | |
1518 | } | |
1519 | ||
1520 | static Lisp_Object make_lispy_event (); | |
1521 | static Lisp_Object make_lispy_movement (); | |
1522 | static Lisp_Object modify_event_symbol (); | |
1523 | ||
1524 | static Lisp_Object | |
1525 | kbd_buffer_get_event () | |
1526 | { | |
1527 | register int c; | |
1528 | Lisp_Object obj; | |
1529 | ||
1530 | if (noninteractive) | |
1531 | { | |
1532 | c = getchar (); | |
1533 | XSET (obj, Lisp_Int, c); | |
1534 | return obj; | |
1535 | } | |
1536 | ||
1537 | /* Wait until there is input available. */ | |
1538 | for (;;) | |
1539 | { | |
1540 | ||
1541 | /* Process or toss any events that we don't want to return as | |
1542 | input. The fact that we remove undesirable events here | |
1543 | allows us to use EVENT_QUEUES_EMPTY in the rest of this loop. */ | |
1544 | if (! do_mouse_tracking) | |
1545 | while (kbd_fetch_ptr != kbd_store_ptr) | |
1546 | { | |
1547 | if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE) | |
1548 | kbd_fetch_ptr = kbd_buffer; | |
1549 | ||
1550 | if (kbd_fetch_ptr->kind == mouse_click | |
1551 | || kbd_fetch_ptr->kind == scrollbar_click) | |
1552 | { | |
1553 | if ((kbd_fetch_ptr->modifiers & up_modifier) == 0) | |
1554 | break; | |
1555 | } | |
1556 | else | |
1557 | break; | |
1558 | ||
1559 | kbd_fetch_ptr++; | |
1560 | } | |
1561 | ||
1562 | if (!EVENT_QUEUES_EMPTY) | |
1563 | break; | |
1564 | ||
1565 | /* If the quit flag is set, then read_char will return | |
1566 | quit_char, so that counts as "available input." */ | |
1567 | if (!NILP (Vquit_flag)) | |
1568 | quit_throw_to_read_char (); | |
1569 | ||
1570 | /* One way or another, wait until input is available; then, if | |
1571 | interrupt handlers have not read it, read it now. */ | |
1572 | ||
1573 | #ifdef OLDVMS | |
1574 | wait_for_kbd_input (); | |
1575 | #else | |
1576 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
1577 | #ifdef SIGIO | |
1578 | gobble_input (0); | |
1579 | #endif /* SIGIO */ | |
1580 | if (EVENT_QUEUES_EMPTY) | |
1581 | { | |
f76475ad JB |
1582 | Lisp_Object minus_one; |
1583 | ||
1584 | XSET (minus_one, Lisp_Int, -1); | |
1585 | wait_reading_process_input (0, 0, minus_one, 1); | |
284f4730 JB |
1586 | |
1587 | if (!interrupt_input && EVENT_QUEUES_EMPTY) | |
1588 | { | |
1589 | read_avail_input (0); | |
1590 | } | |
1591 | } | |
1592 | #endif /* not VMS */ | |
1593 | } | |
1594 | ||
1595 | /* At this point, we know that there is a readable event available | |
1596 | somewhere. If the event queue is empty, then there must be a | |
1597 | mouse movement enabled and available. */ | |
1598 | if (kbd_fetch_ptr != kbd_store_ptr) | |
1599 | { | |
1600 | if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE) | |
1601 | kbd_fetch_ptr = kbd_buffer; | |
3e51c7b7 JB |
1602 | |
1603 | #ifdef MULTI_FRAME | |
2ce30ea2 JB |
1604 | XSET (Vlast_event_frame, Lisp_Frame, |
1605 | XFRAME (FRAME_FOCUS_FRAME (kbd_fetch_ptr->frame))); | |
3e51c7b7 JB |
1606 | #endif |
1607 | ||
1113d9db | 1608 | last_event_timestamp = kbd_fetch_ptr->timestamp; |
284f4730 JB |
1609 | obj = make_lispy_event (kbd_fetch_ptr); |
1610 | kbd_fetch_ptr->kind = no_event; | |
1611 | kbd_fetch_ptr++; | |
1612 | if (XTYPE (obj) == Lisp_Int) | |
1613 | XSET (obj, Lisp_Int, XINT (obj) & (meta_key ? 0377 : 0177)); | |
1614 | } | |
1615 | else if (do_mouse_tracking && mouse_moved) | |
1616 | { | |
ff11dfa1 | 1617 | FRAME_PTR frame; |
e5d77022 JB |
1618 | Lisp_Object x, y; |
1619 | unsigned long time; | |
284f4730 | 1620 | |
ff11dfa1 | 1621 | (*mouse_position_hook) (&frame, &x, &y, &time); |
3e51c7b7 | 1622 | #ifdef MULTI_FRAME |
ff11dfa1 | 1623 | XSET (Vlast_event_frame, Lisp_Frame, frame); |
3e51c7b7 | 1624 | #endif |
284f4730 | 1625 | |
ff11dfa1 | 1626 | obj = make_lispy_movement (frame, x, y, time); |
284f4730 JB |
1627 | } |
1628 | else | |
1629 | /* We were promised by the above while loop that there was | |
1630 | something for us to read! */ | |
1631 | abort (); | |
1632 | ||
1633 | input_pending = readable_events (); | |
1634 | ||
1635 | return (obj); | |
1636 | } | |
1637 | ||
1638 | /* Caches for modify_event_symbol. */ | |
1639 | static Lisp_Object func_key_syms; | |
1640 | static Lisp_Object mouse_syms; | |
1641 | ||
1642 | /* You'll notice that this table is arranged to be conveniently | |
1643 | indexed by X Windows keysym values. */ | |
1644 | static char *lispy_function_keys[] = | |
1645 | { | |
1646 | /* X Keysym value */ | |
1647 | ||
1648 | "home", /* 0xff50 */ /* IsCursorKey */ | |
1649 | "left", | |
1650 | "up", | |
1651 | "right", | |
1652 | "down", | |
1653 | "prior", | |
1654 | "next", | |
1655 | "end", | |
1656 | "begin", | |
1657 | 0, /* 0xff59 */ | |
1658 | 0, 0, 0, 0, 0, 0, | |
1659 | "select", /* 0xff60 */ /* IsMiscFunctionKey */ | |
1660 | "print", | |
1661 | "execute", | |
1662 | "insert", | |
1663 | 0, /* 0xff64 */ | |
1664 | "undo", | |
1665 | "redo", | |
1666 | "menu", | |
1667 | "find", | |
1668 | "cancel", | |
1669 | "help", | |
1670 | "break", /* 0xff6b */ | |
1671 | ||
1672 | /* Here are some keys found mostly on HP keyboards. The X event | |
1673 | handling code will strip bit 29, which flags vendor-specific | |
1674 | keysyms. */ | |
1675 | "reset", /* 0x1000ff6c */ | |
1676 | "system", | |
1677 | "user", | |
1678 | "clearline", | |
1679 | "insertline", | |
1680 | "deleteline", | |
1681 | "insertchar", | |
1682 | "deletechar", | |
1683 | "backtab", | |
1684 | "kp_backtab", /* 0x1000ff75 */ | |
1685 | 0, /* 0xff76 */ | |
1686 | 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff7f */ | |
1687 | "kp-space", /* 0xff80 */ /* IsKeypadKey */ | |
1688 | 0, 0, 0, 0, 0, 0, 0, 0, | |
1689 | "kp-tab", /* 0xff89 */ | |
1690 | 0, 0, 0, | |
1691 | "kp-enter", /* 0xff8d */ | |
1692 | 0, 0, 0, | |
1693 | "kp-f1", /* 0xff91 */ | |
1694 | "kp-f2", | |
1695 | "kp-f3", | |
1696 | "kp-f4", | |
1697 | 0, /* 0xff95 */ | |
1698 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
1699 | "kp-multiply", /* 0xffaa */ | |
1700 | "kp-add", | |
1701 | "kp-separator", | |
1702 | "kp-subtract", | |
1703 | "kp-decimal", | |
1704 | "kp-divide", /* 0xffaf */ | |
1705 | "kp-0", /* 0xffb0 */ | |
1706 | "kp-1", "kp-2", "kp-3", "kp-4", "kp-5", "kp-6", "kp-7", "kp-8", "kp-9", | |
1707 | 0, /* 0xffba */ | |
1708 | 0, 0, | |
1709 | "kp-equal", /* 0xffbd */ | |
1710 | "f1", /* 0xffbe */ /* IsFunctionKey */ | |
1711 | "f2", "f3", "f4", | |
1712 | "f5", "f6", "f7", "f8", "f9", "f10", "f11", "f12", | |
1713 | "f13", "f14", "f15", "f16", "f17", "f18", "f19", "f20", | |
1714 | "f21", "f22", "f23", "f24", "f25", "f26", "f27", "f28", | |
1715 | "f29", "f30", "f31", "f32", "f33", "f34", "f35" /* 0xffe0 */ | |
1716 | }; | |
1717 | ||
1718 | static char *lispy_mouse_names[] = | |
1719 | { | |
1720 | "mouse-1", "mouse-2", "mouse-3", "mouse-4", "mouse-5" | |
1721 | }; | |
1722 | ||
1723 | /* Given a struct input_event, build the lisp event which represents | |
1724 | it. If EVENT is 0, build a mouse movement event from the mouse | |
1725 | movement buffer, which should have a movement event in it. */ | |
1726 | ||
1727 | static Lisp_Object | |
1728 | make_lispy_event (event) | |
1729 | struct input_event *event; | |
1730 | { | |
1731 | #ifdef SWITCH_ENUM_BUG | |
1732 | switch ((int) event->kind) | |
1733 | #else | |
1734 | switch (event->kind) | |
1735 | #endif | |
1736 | { | |
1737 | ||
1738 | /* A simple keystroke. */ | |
1739 | case ascii_keystroke: | |
1740 | return event->code; | |
1741 | break; | |
1742 | ||
1743 | /* A function key. The symbol may need to have modifier prefixes | |
1744 | tacked onto it. */ | |
1745 | case non_ascii_keystroke: | |
1746 | return modify_event_symbol (XFASTINT (event->code), event->modifiers, | |
1747 | Qfunction_key, | |
1748 | lispy_function_keys, &func_key_syms, | |
1749 | (sizeof (lispy_function_keys) | |
1750 | / sizeof (lispy_function_keys[0]))); | |
1751 | break; | |
1752 | ||
1753 | /* A mouse click - build a list of the relevant information. */ | |
1754 | case mouse_click: | |
1755 | { | |
1756 | int part; | |
1757 | Lisp_Object window = | |
ff11dfa1 | 1758 | window_from_coordinates (event->frame, |
284f4730 JB |
1759 | XINT (event->x), XINT (event->y), |
1760 | &part); | |
1761 | Lisp_Object posn; | |
1762 | ||
1763 | if (XTYPE (window) != Lisp_Window) | |
1764 | posn = Qnil; | |
1765 | else | |
1766 | { | |
1767 | XSETINT (event->x, (XINT (event->x) | |
1768 | - XINT (XWINDOW (window)->left))); | |
1769 | XSETINT (event->y, (XINT (event->y) | |
1770 | - XINT (XWINDOW (window)->top))); | |
1771 | ||
1772 | if (part == 1) | |
1773 | posn = Qmode_line; | |
1774 | else if (part == 2) | |
e5d77022 | 1775 | posn = Qvertical_line; |
284f4730 JB |
1776 | else |
1777 | XSET (posn, Lisp_Int, | |
1778 | buffer_posn_from_coords (XWINDOW (window), | |
1779 | XINT (event->x), | |
1780 | XINT (event->y))); | |
1781 | } | |
1782 | ||
1783 | return Fcons (modify_event_symbol (XFASTINT (event->code) - 1, | |
1784 | event->modifiers, | |
1785 | Qmouse_click, | |
1786 | lispy_mouse_names, &mouse_syms, | |
1787 | (sizeof (lispy_mouse_names) | |
1788 | / sizeof (lispy_mouse_names[0]))), | |
1789 | Fcons (window, | |
1790 | Fcons (posn, | |
1791 | Fcons (Fcons (event->x, event->y), | |
1113d9db JB |
1792 | Fcons (make_number |
1793 | (event->timestamp), | |
284f4730 JB |
1794 | Qnil))))); |
1795 | } | |
1796 | ||
1797 | /* A scrollbar click. Build a list containing the relevant | |
1798 | information. */ | |
1799 | case scrollbar_click: | |
1800 | { | |
1801 | Lisp_Object button | |
1802 | = modify_event_symbol (XFASTINT (event->code) - 1, | |
1803 | event->modifiers, | |
1804 | Qmouse_click, | |
1805 | lispy_mouse_names, &mouse_syms, | |
1806 | (sizeof (lispy_mouse_names) | |
1807 | / sizeof (lispy_mouse_names[0]))); | |
1808 | return Fcons (event->part, | |
ff11dfa1 | 1809 | Fcons (FRAME_SELECTED_WINDOW (event->frame), |
284f4730 JB |
1810 | Fcons (button, |
1811 | Fcons (Fcons (event->x, event->y), | |
1113d9db JB |
1812 | Fcons (make_number |
1813 | (event->timestamp), | |
284f4730 JB |
1814 | Qnil))))); |
1815 | } | |
1816 | ||
1817 | /* The 'kind' field of the event is something we don't recognize. */ | |
1818 | default: | |
1819 | abort(); | |
1820 | } | |
1821 | } | |
1822 | ||
1823 | static Lisp_Object | |
ff11dfa1 JB |
1824 | make_lispy_movement (frame, x, y, time) |
1825 | FRAME_PTR frame; | |
284f4730 | 1826 | Lisp_Object x, y; |
e5d77022 | 1827 | unsigned long time; |
284f4730 JB |
1828 | { |
1829 | Lisp_Object window; | |
1830 | int ix, iy; | |
1831 | Lisp_Object posn; | |
1832 | int part; | |
1833 | ||
1834 | ix = XINT (x); | |
1835 | iy = XINT (y); | |
ff11dfa1 JB |
1836 | window = (frame |
1837 | ? window_from_coordinates (frame, ix, iy, &part) | |
284f4730 JB |
1838 | : Qnil); |
1839 | if (XTYPE (window) != Lisp_Window) | |
1840 | posn = Qnil; | |
1841 | else | |
1842 | { | |
1843 | ix -= XINT (XWINDOW (window)->left); | |
1844 | iy -= XINT (XWINDOW (window)->top); | |
1845 | if (part == 1) | |
1846 | posn = Qmode_line; | |
1847 | else if (part == 2) | |
e5d77022 | 1848 | posn = Qvertical_line; |
284f4730 JB |
1849 | else |
1850 | XSET (posn, Lisp_Int, buffer_posn_from_coords (XWINDOW (window), | |
1851 | ix, iy)); | |
1852 | } | |
1853 | ||
1854 | XSETINT (x, ix); | |
1855 | XSETINT (y, iy); | |
1856 | return Fcons (Qmouse_movement, | |
1857 | Fcons (window, | |
1858 | Fcons (posn, | |
1859 | Fcons (Fcons (x, y), | |
e5d77022 | 1860 | Fcons (make_number (time), Qnil))))); |
284f4730 JB |
1861 | } |
1862 | ||
1863 | ||
1864 | ||
1865 | /* Place the written representation of MODIFIERS in BUF, '\0'-terminated, | |
1866 | and return its length. */ | |
1867 | ||
1868 | static int | |
1869 | format_modifiers (modifiers, buf) | |
1870 | int modifiers; | |
1871 | char *buf; | |
1872 | { | |
1873 | char *p = buf; | |
1874 | ||
fce33686 JB |
1875 | /* Events with the `up' modifier should always be turned into |
1876 | click or drag events. */ | |
1877 | if (modifiers & up_modifier) | |
1878 | abort (); | |
1879 | ||
1880 | if (modifiers & alt_modifier) { *p++ = 'A'; *p++ = '-'; } | |
1881 | if (modifiers & ctrl_modifier) { *p++ = 'C'; *p++ = '-'; } | |
1882 | if (modifiers & hyper_modifier) { *p++ = 'H'; *p++ = '-'; } | |
1883 | if (modifiers & meta_modifier) { *p++ = 'M'; *p++ = '-'; } | |
284f4730 | 1884 | if (modifiers & shift_modifier) { *p++ = 'S'; *p++ = '-'; } |
fce33686 JB |
1885 | if (modifiers & super_modifier) { strcpy (p, "super-"); p += 6; } |
1886 | if (modifiers & down_modifier) { strcpy (p, "down-"); p += 5; } | |
1887 | if (modifiers & drag_modifier) { strcpy (p, "drag-"); p += 5; } | |
284f4730 JB |
1888 | *p = '\0'; |
1889 | ||
1890 | return p - buf; | |
1891 | } | |
1892 | ||
1893 | ||
1894 | /* Given a symbol whose name begins with modifiers ("C-", "M-", etc), | |
1895 | return a symbol with the modifiers placed in the canonical order. | |
fce33686 JB |
1896 | Canonical order is alphabetical, except for down and drag, which |
1897 | always come last. | |
284f4730 JB |
1898 | |
1899 | Fdefine_key calls this to make sure that (for example) C-M-foo | |
1900 | and M-C-foo end up being equivalent in the keymap. */ | |
1901 | ||
1902 | Lisp_Object | |
1903 | reorder_modifiers (symbol) | |
1904 | Lisp_Object symbol; | |
1905 | { | |
1906 | struct Lisp_String *name; | |
1907 | int i; | |
1908 | int modifiers; | |
1909 | int not_canonical; | |
1910 | ||
1911 | CHECK_SYMBOL (symbol, 1); | |
1912 | ||
1913 | modifiers = 0; | |
1914 | name = XSYMBOL (symbol)->name; | |
1915 | ||
1916 | /* Special case for things with only one modifier, which is | |
1917 | (hopefully) the vast majority of cases. */ | |
1918 | if (! (name->size >= 4 && name->data[1] == '-' && name->data[3] == '-')) | |
1919 | return symbol; | |
1920 | ||
fce33686 | 1921 | for (i = 0; i+1 < name->data[i]; ) |
284f4730 JB |
1922 | switch (name->data[i]) |
1923 | { | |
fce33686 JB |
1924 | case 'A': |
1925 | if (name->data[i] != '-') goto no_more_modifiers; | |
1926 | not_canonical |= (modifiers & ~(alt_modifier - 1)); | |
1927 | modifiers |= alt_modifier; | |
1928 | i += 2; | |
284f4730 JB |
1929 | break; |
1930 | ||
1931 | case 'C': | |
fce33686 JB |
1932 | if (name->data[i] != '-') goto no_more_modifiers; |
1933 | not_canonical |= (modifiers & ~(ctrl_modifier - 1)); | |
284f4730 | 1934 | modifiers |= ctrl_modifier; |
fce33686 JB |
1935 | i += 2; |
1936 | break; | |
1937 | ||
1938 | case 'H': | |
1939 | if (name->data[i] != '-') goto no_more_modifiers; | |
1940 | not_canonical |= (modifiers & ~(hyper_modifier - 1)); | |
1941 | modifiers |= hyper_modifier; | |
1942 | i += 2; | |
1943 | break; | |
1944 | ||
1945 | case 'M': | |
1946 | if (name->data[i] != '-') goto no_more_modifiers; | |
1947 | not_canonical |= (modifiers & ~(meta_modifier - 1)); | |
1948 | modifiers |= meta_modifier; | |
1949 | i += 2; | |
284f4730 JB |
1950 | break; |
1951 | ||
1952 | case 'S': | |
fce33686 JB |
1953 | if (name->data[i] != '-') goto no_more_modifiers; |
1954 | not_canonical |= (modifiers & ~(shift_modifier - 1)); | |
284f4730 | 1955 | modifiers |= shift_modifier; |
fce33686 JB |
1956 | i += 2; |
1957 | break; | |
1958 | ||
1959 | case 's': | |
1960 | if (i + 6 > name->size | |
1961 | || strncmp (name->data + i, "super-", 6)) | |
1962 | goto no_more_modifiers; | |
1963 | not_canonical |= (modifiers & ~(super_modifier - 1)); | |
1964 | modifiers |= super_modifier; | |
1965 | i += 6; | |
284f4730 JB |
1966 | break; |
1967 | ||
fce33686 JB |
1968 | case 'd': |
1969 | if (i + 5 > name->size) | |
1970 | goto no_more_modifiers; | |
1971 | if (! strncmp (name->data + i, "drag-", 5)) | |
1972 | { | |
1973 | not_canonical |= (modifiers & ~(drag_modifier - 1)); | |
1974 | modifiers |= drag_modifier; | |
1975 | i += 5; | |
1976 | } | |
1977 | else if (! strncmp (name->data + i, "down-", 5)) | |
1978 | { | |
1979 | not_canonical |= (modifiers & ~(down_modifier - 1)); | |
1980 | modifiers |= down_modifier; | |
1981 | i += 5; | |
1982 | } | |
1983 | else | |
1984 | goto no_more_modifiers; | |
284f4730 JB |
1985 | break; |
1986 | ||
1987 | default: | |
1988 | goto no_more_modifiers; | |
1989 | } | |
1990 | no_more_modifiers: | |
1991 | ||
1992 | if (!not_canonical) | |
1993 | return symbol; | |
1994 | ||
1995 | /* The modifiers were out of order, so find a new symbol with the | |
1996 | mods in order. Since the symbol name could contain nulls, we can't | |
1997 | use intern here; we have to use Fintern, which expects a genuine | |
1998 | Lisp_String, and keeps a reference to it. */ | |
1999 | { | |
fce33686 | 2000 | char *new_mods = (char *) alloca (sizeof ("A-C-H-M-S-super-U-down-drag-")); |
284f4730 JB |
2001 | int len = format_modifiers (modifiers, new_mods); |
2002 | Lisp_Object new_name = make_uninit_string (len + name->size - i); | |
2003 | ||
2004 | bcopy (new_mods, XSTRING (new_name)->data, len); | |
2005 | bcopy (name->data + i, XSTRING (new_name)->data + len, name->size - i); | |
2006 | ||
2007 | return Fintern (new_name, Qnil); | |
2008 | } | |
2009 | } | |
2010 | ||
2011 | ||
2012 | /* For handling events, we often want to produce a symbol whose name | |
2013 | is a series of modifier key prefixes ("M-", "C-", etcetera) attached | |
2014 | to some base, like the name of a function key or mouse button. | |
2015 | modify_event_symbol produces symbols of this sort. | |
2016 | ||
2017 | NAME_TABLE should point to an array of strings, such that NAME_TABLE[i] | |
2018 | is the name of the i'th symbol. TABLE_SIZE is the number of elements | |
2019 | in the table. | |
2020 | ||
2021 | SYMBOL_TABLE should be a pointer to a Lisp_Object whose value will | |
2022 | persist between calls to modify_event_symbol that it can use to | |
2023 | store a cache of the symbols it's generated for this NAME_TABLE | |
2024 | before. | |
2025 | ||
2026 | SYMBOL_NUM is the number of the base name we want from NAME_TABLE. | |
2027 | ||
2028 | MODIFIERS is a set of modifier bits (as given in struct input_events) | |
2029 | whose prefixes should be applied to the symbol name. | |
2030 | ||
2031 | SYMBOL_KIND is the value to be placed in the event_kind property of | |
2032 | the returned symbol. */ | |
2033 | ||
2034 | static Lisp_Object | |
2035 | modify_event_symbol (symbol_num, modifiers, symbol_kind, name_table, | |
2036 | symbol_table, table_size) | |
2037 | int symbol_num; | |
2038 | unsigned modifiers; | |
2039 | Lisp_Object symbol_kind; | |
2040 | char **name_table; | |
2041 | Lisp_Object *symbol_table; | |
2042 | int table_size; | |
2043 | { | |
2044 | Lisp_Object *slot, *unmodified_slot; | |
2045 | ||
2046 | /* Is this a request for a valid symbol? */ | |
2047 | if (symbol_num < 0 || symbol_num >= table_size | |
2048 | || modifiers >= NUM_MODIFIER_COMBOS) | |
2049 | abort (); | |
2050 | ||
2051 | /* If *symbol_table is not a vector of the appropriate size, | |
2052 | set it to one. */ | |
2053 | if (XTYPE (*symbol_table) != Lisp_Vector | |
2054 | || XVECTOR (*symbol_table)->size != table_size) | |
2055 | *symbol_table = Fmake_vector (make_number (table_size), Qnil); | |
2056 | ||
2057 | unmodified_slot = slot = & XVECTOR (*symbol_table)->contents[symbol_num]; | |
2058 | ||
2059 | /* If there are modifier keys, there had better be a vector in | |
2060 | this symbol's position of the symbol_table. */ | |
2061 | if (modifiers != 0) | |
2062 | { | |
2063 | Lisp_Object slot_contents = *slot; | |
2064 | ||
2065 | /* If there isn't the right sort of vector there, put one in. */ | |
2066 | if (XTYPE (slot_contents) != Lisp_Vector | |
2067 | || XVECTOR (slot_contents)->size != NUM_MODIFIER_COMBOS) | |
2068 | { | |
2069 | *slot = Fmake_vector (make_number (NUM_MODIFIER_COMBOS), Qnil); | |
2070 | ||
2071 | /* Make sure that the vector has an entry for the unmodified | |
2072 | symbol, so we can put it on the event_unmodified property. */ | |
2073 | if (! NILP (slot_contents)) | |
2074 | XVECTOR (*slot)->contents[0] = slot_contents; | |
2075 | else | |
2076 | XVECTOR (*slot)->contents[0] = intern (name_table [symbol_num]); | |
2077 | } | |
2078 | } | |
2079 | ||
2080 | /* If this entry has been filled in with a modified symbol vector, | |
2081 | point to the appropriate slot within that. */ | |
2082 | if (XTYPE (*slot) == Lisp_Vector) | |
2083 | { | |
2084 | unmodified_slot = & XVECTOR (*slot)->contents[0]; | |
2085 | slot = & XVECTOR (*slot)->contents[modifiers]; | |
2086 | } | |
2087 | ||
2088 | /* Make sure we have an unmodified version of the symbol in its | |
2089 | proper place? */ | |
2090 | if (NILP (*unmodified_slot)) | |
2091 | { | |
2092 | *unmodified_slot = intern (name_table [symbol_num]); | |
2093 | Fput (*unmodified_slot, Qevent_kind, symbol_kind); | |
2094 | Fput (*unmodified_slot, Qevent_unmodified, *unmodified_slot); | |
2095 | } | |
2096 | ||
2097 | /* Have we already created a symbol for this combination of modifiers? */ | |
2098 | if (NILP (*slot)) | |
2099 | { | |
2100 | /* No, let's create one. */ | |
2101 | char *modified_name | |
2102 | = (char *) alloca (sizeof ("C-M-S-U-") | |
2103 | + strlen (name_table [symbol_num])); | |
2104 | ||
2105 | strcpy (modified_name + format_modifiers (modifiers, modified_name), | |
2106 | name_table [symbol_num]); | |
2107 | ||
2108 | *slot = intern (modified_name); | |
2109 | Fput (*slot, Qevent_kind, symbol_kind); | |
2110 | Fput (*slot, Qevent_unmodified, *unmodified_slot); | |
2111 | } | |
2112 | ||
2113 | return *slot; | |
2114 | } | |
2115 | \f | |
2116 | DEFUN ("mouse-click-p", Fmouse_click_p, Smouse_click_p, 1, 1, 0, | |
2117 | "Return non-nil iff OBJECT is a representation of a mouse event.\n\ | |
2118 | A mouse event is a list of five elements whose car is a symbol of the\n\ | |
2119 | form <MODIFIERS>mouse-<DIGIT>. I hope this is a temporary hack.") | |
2120 | (object) | |
2121 | Lisp_Object object; | |
2122 | { | |
2123 | if (EVENT_HAS_PARAMETERS (object) | |
2124 | && EQ (EVENT_HEAD_KIND (EVENT_HEAD (object)), | |
2125 | Qmouse_click)) | |
2126 | return Qt; | |
2127 | else | |
2128 | return Qnil; | |
2129 | } | |
2130 | \f | |
2131 | /* Store into *addr a value nonzero if terminal input chars are available. | |
2132 | Serves the purpose of ioctl (0, FIONREAD, addr) | |
2133 | but works even if FIONREAD does not exist. | |
2134 | (In fact, this may actually read some input.) */ | |
2135 | ||
2136 | static void | |
2137 | get_input_pending (addr) | |
2138 | int *addr; | |
2139 | { | |
2140 | /* First of all, have we already counted some input? */ | |
2141 | *addr = !NILP (Vquit_flag) || readable_events (); | |
2142 | ||
2143 | /* If input is being read as it arrives, and we have none, there is none. */ | |
2144 | if (*addr > 0 || (interrupt_input && ! interrupts_deferred)) | |
2145 | return; | |
2146 | ||
2147 | /* Try to read some input and see how much we get. */ | |
2148 | gobble_input (0); | |
2149 | *addr = !NILP (Vquit_flag) || readable_events (); | |
2150 | } | |
2151 | ||
2152 | /* Interface to read_avail_input, blocking SIGIO if necessary. */ | |
2153 | ||
2154 | int | |
2155 | gobble_input (expected) | |
2156 | int expected; | |
2157 | { | |
2158 | #ifndef VMS | |
2159 | #ifdef SIGIO | |
2160 | if (interrupt_input) | |
2161 | { | |
32676c08 | 2162 | SIGMASKTYPE mask; |
e065a56e | 2163 | mask = sigblockx (SIGIO); |
284f4730 | 2164 | read_avail_input (expected); |
e065a56e | 2165 | sigsetmask (mask); |
284f4730 JB |
2166 | } |
2167 | else | |
2168 | #endif | |
2169 | read_avail_input (expected); | |
2170 | #endif | |
2171 | } | |
2172 | \f | |
2173 | #ifndef VMS | |
2174 | ||
2175 | /* Read any terminal input already buffered up by the system | |
2176 | into the kbd_buffer, but do not wait. | |
2177 | ||
2178 | EXPECTED should be nonzero if the caller knows there is some input. | |
2179 | ||
2180 | Except on VMS, all input is read by this function. | |
2181 | If interrupt_input is nonzero, this function MUST be called | |
2182 | only when SIGIO is blocked. | |
2183 | ||
2184 | Returns the number of keyboard chars read, or -1 meaning | |
2185 | this is a bad time to try to read input. */ | |
2186 | ||
2187 | static int | |
2188 | read_avail_input (expected) | |
2189 | int expected; | |
2190 | { | |
2191 | struct input_event buf[KBD_BUFFER_SIZE]; | |
2192 | register int i; | |
2193 | int nread; | |
2194 | ||
2195 | if (read_socket_hook) | |
2196 | /* No need for FIONREAD or fcntl; just say don't wait. */ | |
2197 | nread = (*read_socket_hook) (0, buf, KBD_BUFFER_SIZE, expected, expected); | |
2198 | else | |
2199 | { | |
2200 | unsigned char cbuf[KBD_BUFFER_SIZE]; | |
2201 | ||
2202 | #ifdef FIONREAD | |
2203 | /* Find out how much input is available. */ | |
2204 | if (ioctl (0, FIONREAD, &nread) < 0) | |
2205 | /* Formerly simply reported no input, but that sometimes led to | |
2206 | a failure of Emacs to terminate. | |
2207 | SIGHUP seems appropriate if we can't reach the terminal. */ | |
2208 | kill (getpid (), SIGHUP); | |
2209 | if (nread == 0) | |
2210 | return 0; | |
2211 | if (nread > sizeof cbuf) | |
2212 | nread = sizeof cbuf; | |
2213 | #else /* no FIONREAD */ | |
2214 | #ifdef USG | |
2215 | /* Read some input if available, but don't wait. */ | |
2216 | nread = sizeof cbuf; | |
2217 | fcntl (fileno (stdin), F_SETFL, O_NDELAY); | |
2218 | #else | |
2219 | you lose; | |
2220 | #endif | |
2221 | #endif | |
2222 | ||
2223 | /* Now read; for one reason or another, this will not block. */ | |
2224 | while (1) | |
2225 | { | |
2226 | nread = read (fileno (stdin), cbuf, nread); | |
2227 | #ifdef AIX | |
2228 | /* The kernel sometimes fails to deliver SIGHUP for ptys. | |
2229 | This looks incorrect, but it isn't, because _BSD causes | |
2230 | O_NDELAY to be defined in fcntl.h as O_NONBLOCK, | |
2231 | and that causes a value other than 0 when there is no input. */ | |
2232 | if (nread == 0) | |
2233 | kill (SIGHUP, 0); | |
2234 | #endif | |
2235 | /* Retry the read if it is interrupted. */ | |
2236 | if (nread >= 0 | |
2237 | || ! (errno == EAGAIN || errno == EFAULT | |
2238 | #ifdef EBADSLT | |
2239 | || errno == EBADSLT | |
2240 | #endif | |
2241 | )) | |
2242 | break; | |
2243 | } | |
2244 | ||
2245 | #ifndef FIONREAD | |
2246 | #ifdef USG | |
2247 | fcntl (fileno (stdin), F_SETFL, 0); | |
2248 | #endif /* USG */ | |
2249 | #endif /* no FIONREAD */ | |
2250 | for (i = 0; i < nread; i++) | |
2251 | { | |
2252 | buf[i].kind = ascii_keystroke; | |
2253 | XSET (buf[i].code, Lisp_Int, cbuf[i]); | |
ff11dfa1 | 2254 | buf[i].frame = selected_frame; |
284f4730 JB |
2255 | } |
2256 | } | |
2257 | ||
2258 | /* Scan the chars for C-g and store them in kbd_buffer. */ | |
2259 | for (i = 0; i < nread; i++) | |
2260 | { | |
2261 | kbd_buffer_store_event (&buf[i]); | |
2262 | /* Don't look at input that follows a C-g too closely. | |
2263 | This reduces lossage due to autorepeat on C-g. */ | |
2264 | if (buf[i].kind == ascii_keystroke | |
2265 | && XINT(buf[i].code) == quit_char) | |
2266 | break; | |
2267 | } | |
2268 | ||
2269 | return nread; | |
2270 | } | |
2271 | #endif /* not VMS */ | |
2272 | \f | |
2273 | #ifdef SIGIO /* for entire page */ | |
2274 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
2275 | ||
2ce30ea2 | 2276 | SIGTYPE |
284f4730 JB |
2277 | input_available_signal (signo) |
2278 | int signo; | |
2279 | { | |
2280 | /* Must preserve main program's value of errno. */ | |
2281 | int old_errno = errno; | |
2282 | #ifdef BSD4_1 | |
2283 | extern int select_alarmed; | |
2284 | #endif | |
2285 | ||
2286 | #ifdef USG | |
2287 | /* USG systems forget handlers when they are used; | |
2288 | must reestablish each time */ | |
2289 | signal (signo, input_available_signal); | |
2290 | #endif /* USG */ | |
2291 | ||
2292 | #ifdef BSD4_1 | |
2293 | sigisheld (SIGIO); | |
2294 | #endif | |
2295 | ||
ffd56f97 JB |
2296 | if (input_available_clear_time) |
2297 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
284f4730 JB |
2298 | |
2299 | while (1) | |
2300 | { | |
2301 | int nread; | |
2302 | nread = read_avail_input (1); | |
2303 | /* -1 means it's not ok to read the input now. | |
2304 | UNBLOCK_INPUT will read it later; now, avoid infinite loop. | |
2305 | 0 means there was no keyboard input available. */ | |
2306 | if (nread <= 0) | |
2307 | break; | |
2308 | ||
2309 | #ifdef BSD4_1 | |
2310 | select_alarmed = 1; /* Force the select emulator back to life */ | |
2311 | #endif | |
2312 | } | |
2313 | ||
2314 | #ifdef BSD4_1 | |
2315 | sigfree (); | |
2316 | #endif | |
2317 | errno = old_errno; | |
2318 | } | |
2319 | #endif /* SIGIO */ | |
2320 | \f | |
2321 | /* Return the prompt-string of a sparse keymap. | |
2322 | This is the first element which is a string. | |
2323 | Return nil if there is none. */ | |
2324 | ||
2325 | Lisp_Object | |
2326 | map_prompt (map) | |
2327 | Lisp_Object map; | |
2328 | { | |
2329 | while (CONSP (map)) | |
2330 | { | |
2331 | register Lisp_Object tem; | |
2332 | tem = Fcar (map); | |
2333 | if (XTYPE (tem) == Lisp_String) | |
2334 | return tem; | |
2335 | map = Fcdr (map); | |
2336 | } | |
2337 | return Qnil; | |
2338 | } | |
2339 | ||
2340 | static int echo_flag; | |
2341 | static int echo_now; | |
2342 | ||
2343 | /* Read a character like read_char but optionally prompt based on maps | |
7d6de002 RS |
2344 | in the array MAPS. NMAPS is the length of MAPS. |
2345 | ||
2346 | PREV_EVENT is the previous input event, or nil if we are reading | |
2347 | the first event of a key sequence. | |
2348 | ||
2349 | If we use a mouse menu to read the input, we store 1 into *USED_MOUSE_MENU. | |
2350 | Otherwise we store 0 there. | |
284f4730 JB |
2351 | |
2352 | The prompting is done based on the prompt-string of the map | |
2353 | and the strings associated with various map elements. */ | |
2354 | ||
2355 | Lisp_Object | |
7d6de002 RS |
2356 | read_char_menu_prompt (nmaps, maps, prev_event, used_mouse_menu) |
2357 | int nmaps; | |
2358 | Lisp_Object *maps; | |
2359 | Lisp_Object prev_event; | |
2360 | int *used_mouse_menu; | |
284f4730 | 2361 | { |
7d6de002 RS |
2362 | int mapno; |
2363 | register Lisp_Object name; | |
284f4730 | 2364 | int nlength; |
ff11dfa1 | 2365 | int width = FRAME_WIDTH (selected_frame) - 4; |
7d6de002 RS |
2366 | char *menu = (char *) alloca (width + 4); |
2367 | int idx = -1; | |
2368 | Lisp_Object rest, vector; | |
2369 | ||
2370 | *used_mouse_menu = 0; | |
284f4730 JB |
2371 | |
2372 | /* Use local over global Menu maps */ | |
2373 | ||
7d6de002 RS |
2374 | if (! menu_prompting) |
2375 | return Qnil; | |
2376 | ||
2377 | /* Get the menu name from the first map that has one (a prompt string). */ | |
2378 | for (mapno = 0; mapno < nmaps; mapno++) | |
2379 | { | |
2380 | name = map_prompt (maps[mapno]); | |
2381 | if (!NILP (name)) | |
2382 | break; | |
2383 | } | |
284f4730 | 2384 | |
7d6de002 | 2385 | /* If we don't have any menus, just read a character normally. */ |
284f4730 | 2386 | if (NILP (name)) |
7d6de002 RS |
2387 | return Qnil; |
2388 | ||
72cea080 RS |
2389 | #ifdef HAVE_X_WINDOW |
2390 | #ifndef NO_X_MENU | |
7d6de002 RS |
2391 | /* If we got to this point via a mouse click, |
2392 | use a real menu for mouse selection. */ | |
2393 | if (XTYPE (prev_event) == Lisp_Cons) | |
2394 | { | |
2395 | /* Display the menu and get the selection. */ | |
2396 | Lisp_Object *realmaps | |
2397 | = (Lisp_Object *) alloca (nmaps * sizeof (Lisp_Object)); | |
2398 | Lisp_Object value; | |
2399 | int nmaps1 = 0; | |
2400 | ||
2401 | /* Use the maps that are not nil. */ | |
2402 | for (mapno = 0; mapno < nmaps; mapno++) | |
2403 | if (!NILP (maps[mapno])) | |
2404 | realmaps[nmaps1++] = maps[mapno]; | |
2405 | ||
2406 | value = Fx_popup_menu (prev_event, Flist (nmaps1, realmaps)); | |
2407 | if (NILP (value)) | |
2408 | XSET (value, Lisp_Int, quit_char); | |
2409 | *used_mouse_menu = 1; | |
2410 | return value; | |
2411 | } | |
72cea080 RS |
2412 | #endif /* not NO_X_MENU */ |
2413 | #endif /* HAVE_X_WINDOW */ | |
284f4730 JB |
2414 | |
2415 | /* Prompt string always starts with map's prompt, and a space. */ | |
2416 | strcpy (menu, XSTRING (name)->data); | |
2417 | nlength = XSTRING (name)->size; | |
7d6de002 | 2418 | menu[nlength++] = ':'; |
284f4730 JB |
2419 | menu[nlength++] = ' '; |
2420 | menu[nlength] = 0; | |
2421 | ||
7d6de002 RS |
2422 | /* Start prompting at start of first map. */ |
2423 | mapno = 0; | |
2424 | rest = maps[mapno]; | |
284f4730 JB |
2425 | |
2426 | /* Present the documented bindings, a line at a time. */ | |
2427 | while (1) | |
2428 | { | |
2429 | int notfirst = 0; | |
2430 | int i = nlength; | |
2431 | Lisp_Object obj; | |
2432 | int ch; | |
2433 | ||
284f4730 | 2434 | /* Loop over elements of map. */ |
7d6de002 | 2435 | while (i < width) |
284f4730 | 2436 | { |
7d6de002 | 2437 | Lisp_Object s, elt; |
284f4730 | 2438 | |
7d6de002 RS |
2439 | /* If reached end of map, start at beginning of next map. */ |
2440 | if (NILP (rest)) | |
2441 | { | |
2442 | mapno++; | |
2443 | /* At end of last map, wrap around to first map if just starting, | |
2444 | or end this line if already have something on it. */ | |
2445 | if (mapno == nmaps) | |
284f4730 | 2446 | { |
7d6de002 RS |
2447 | if (notfirst) |
2448 | break; | |
2449 | else | |
2450 | mapno = 0; | |
284f4730 | 2451 | } |
7d6de002 | 2452 | rest = maps[mapno]; |
284f4730 | 2453 | } |
7d6de002 RS |
2454 | |
2455 | /* Look at the next element of the map. */ | |
2456 | if (idx >= 0) | |
2457 | elt = XVECTOR (vector)->contents[idx]; | |
284f4730 | 2458 | else |
7d6de002 RS |
2459 | elt = Fcar_safe (rest); |
2460 | ||
2461 | if (idx < 0 && XTYPE (elt) == Lisp_Vector) | |
284f4730 | 2462 | { |
7d6de002 RS |
2463 | /* If we found a dense table in the keymap, |
2464 | advanced past it, but start scanning its contents. */ | |
2465 | rest = Fcdr_safe (rest); | |
2466 | vector = elt; | |
2467 | idx = 0; | |
284f4730 | 2468 | } |
7d6de002 RS |
2469 | else |
2470 | { | |
2471 | /* An ordinary element. */ | |
2472 | s = Fcar_safe (Fcdr_safe (elt)); | |
2473 | if (XTYPE (s) != Lisp_String) | |
2474 | /* Ignore the element if it has no prompt string. */ | |
2475 | ; | |
2476 | /* If we have room for the prompt string, add it to this line. | |
2477 | If this is the first on the line, always add it. */ | |
2478 | else if (XSTRING (s)->size + i < width | |
2479 | || !notfirst) | |
2480 | { | |
2481 | int thiswidth; | |
284f4730 | 2482 | |
7d6de002 RS |
2483 | /* Punctuate between strings. */ |
2484 | if (notfirst) | |
2485 | { | |
2486 | strcpy (menu + i, ", "); | |
2487 | i += 2; | |
2488 | } | |
2489 | notfirst = 1; | |
2490 | ||
2491 | /* Add as much of string as fits. */ | |
2492 | thiswidth = XSTRING (s)->size; | |
2493 | if (thiswidth + i > width) | |
2494 | thiswidth = width - i; | |
2495 | bcopy (XSTRING (s)->data, menu + i, thiswidth); | |
2496 | i += thiswidth; | |
2497 | } | |
2498 | else | |
2499 | { | |
2500 | /* If this element does not fit, end the line now, | |
2501 | and save the element for the next line. */ | |
2502 | strcpy (menu + i, "..."); | |
2503 | break; | |
2504 | } | |
2505 | ||
2506 | /* Move past this element. */ | |
2507 | if (idx >= 0 && idx + 1 >= XVECTOR (rest)->size) | |
2508 | /* Handle reaching end of dense table. */ | |
2509 | idx = -1; | |
2510 | if (idx >= 0) | |
2511 | idx++; | |
2512 | else | |
2513 | rest = Fcdr_safe (rest); | |
2514 | } | |
284f4730 JB |
2515 | } |
2516 | ||
2517 | /* Prompt with that and read response. */ | |
2518 | message1 (menu); | |
7d6de002 | 2519 | obj = read_char (1, 0, 0, Qnil, 0); |
284f4730 JB |
2520 | |
2521 | if (XTYPE (obj) != Lisp_Int) | |
2522 | return obj; | |
2523 | else | |
2524 | ch = XINT (obj); | |
2525 | ||
2526 | if (obj != menu_prompt_more_char | |
2527 | && (XTYPE (menu_prompt_more_char) != Lisp_Int | |
2528 | || obj != make_number (Ctl (XINT (menu_prompt_more_char))))) | |
2529 | return obj; | |
2530 | } | |
2531 | } | |
284f4730 JB |
2532 | \f |
2533 | /* Reading key sequences. */ | |
2534 | ||
2535 | /* Follow KEY in the maps in CURRENT[0..NMAPS-1], placing its bindings | |
2536 | in DEFS[0..NMAPS-1]. Set NEXT[i] to DEFS[i] if DEFS[i] is a | |
2537 | keymap, or nil otherwise. Return the index of the first keymap in | |
2538 | which KEY has any binding, or NMAPS if no map has a binding. | |
2539 | ||
2540 | If KEY is a meta ASCII character, treat it like meta-prefix-char | |
2541 | followed by the corresponding non-meta character. Keymaps in | |
2542 | CURRENT with non-prefix bindings for meta-prefix-char become nil in | |
2543 | NEXT. | |
2544 | ||
2545 | When KEY is not defined in any of the keymaps, if it is an upper | |
2546 | case letter and there are bindings for the corresponding lower-case | |
2547 | letter, return the bindings for the lower-case letter. | |
2548 | ||
2549 | NEXT may == CURRENT. */ | |
2550 | ||
2551 | static int | |
2552 | follow_key (key, nmaps, current, defs, next) | |
2553 | Lisp_Object key; | |
2554 | Lisp_Object *current, *defs, *next; | |
2555 | int nmaps; | |
2556 | { | |
2557 | int i, first_binding; | |
2558 | ||
2559 | /* If KEY is a meta ASCII character, treat it like meta-prefix-char | |
2560 | followed by the corresponding non-meta character. */ | |
2561 | if (XTYPE (key) == Lisp_Int | |
2562 | && XINT (key) >= 0200) | |
2563 | { | |
2564 | for (i = 0; i < nmaps; i++) | |
2565 | if (! NILP (current[i])) | |
2566 | { | |
2567 | next[i] = get_keyelt (access_keymap (current[i], | |
2568 | meta_prefix_char)); | |
2569 | ||
2570 | /* Note that since we pass the resulting bindings through | |
2571 | get_keymap_1, non-prefix bindings for meta-prefix-char | |
2572 | disappear. */ | |
2573 | next[i] = get_keymap_1 (next[i], 0); | |
2574 | } | |
2575 | else | |
2576 | next[i] = Qnil; | |
2577 | ||
2578 | current = next; | |
2579 | XSET (key, Lisp_Int, XFASTINT (key) & 0177); | |
2580 | } | |
2581 | ||
2582 | first_binding = nmaps; | |
2583 | for (i = nmaps - 1; i >= 0; i--) | |
2584 | { | |
2585 | if (! NILP (current[i])) | |
2586 | { | |
2587 | defs[i] = get_keyelt (access_keymap (current[i], key)); | |
2588 | if (! NILP (defs[i])) | |
2589 | first_binding = i; | |
2590 | } | |
2591 | else | |
2592 | defs[i] = Qnil; | |
2593 | } | |
2594 | ||
2595 | /* When KEY is not defined in any of the keymaps, if it is an upper | |
2596 | case letter and there are bindings for the corresponding | |
2597 | lower-case letter, return the bindings for the lower-case letter. */ | |
2598 | if (first_binding == nmaps | |
2599 | && XTYPE (key) == Lisp_Int | |
2600 | && UPPERCASEP (XINT (key))) | |
2601 | { | |
2602 | XSETINT (key, DOWNCASE (XINT (key))); | |
2603 | ||
2604 | first_binding = nmaps; | |
2605 | for (i = nmaps - 1; i >= 0; i--) | |
2606 | { | |
2607 | if (! NILP (current[i])) | |
2608 | { | |
2609 | defs[i] = get_keyelt (access_keymap (current[i], key)); | |
2610 | if (! NILP (defs[i])) | |
2611 | first_binding = i; | |
2612 | } | |
2613 | else | |
2614 | defs[i] = Qnil; | |
2615 | } | |
2616 | } | |
2617 | ||
2618 | /* Given the set of bindings we've found, produce the next set of maps. */ | |
2619 | for (i = 0; i < nmaps; i++) | |
2620 | next[i] = NILP (defs[i]) ? Qnil : get_keymap_1 (defs[i], 0); | |
2621 | ||
2622 | return first_binding; | |
2623 | } | |
2624 | ||
2625 | /* Read a sequence of keys that ends with a non prefix character | |
2626 | according to the keymaps in KEYMAPS[0..nmaps-1]. Keymaps appearing | |
2627 | earlier in KEYMAPS take precidence over those appearing later. | |
2628 | ||
2629 | Store the sequence in KEYBUF, a buffer of size BUFSIZE. Prompt | |
2630 | with PROMPT. Echo starting immediately unless `prompt' is 0. | |
2631 | Return the length of the key sequence stored. | |
2632 | ||
ff11dfa1 | 2633 | If the user switches frames in the midst of a key sequence, we |
284f4730 JB |
2634 | throw away any prefix we have read so far, and start afresh. For |
2635 | mouse clicks, we look up the click in the keymap of the buffer | |
2636 | clicked on, throwing away any prefix if it is not the same buffer | |
2637 | we used to be reading from. */ | |
2638 | ||
2639 | static int | |
2640 | read_key_sequence (keybuf, bufsize, prompt) | |
2641 | Lisp_Object *keybuf; | |
2642 | int bufsize; | |
2643 | Lisp_Object prompt; | |
2644 | { | |
2645 | /* How many keys there are in the current key sequence. */ | |
2646 | int t; | |
2647 | ||
2648 | /* The buffer that the most recently read event was typed at. This | |
2649 | helps us read mouse clicks according to the buffer clicked in, | |
ff11dfa1 | 2650 | and notice when the mouse has moved from one frame to another. */ |
284f4730 JB |
2651 | struct buffer *last_event_buffer = current_buffer; |
2652 | ||
2653 | /* The length of the echo buffer when we started reading, and | |
2654 | the length of this_command_keys when we started reading. */ | |
2655 | int echo_start; | |
2656 | int keys_start = this_command_key_count; | |
2657 | ||
2658 | /* The number of keymaps we're scanning right now, and the number of | |
2659 | keymaps we have allocated space for. */ | |
2660 | int nmaps; | |
2661 | int nmaps_allocated = 0; | |
2662 | ||
253598e4 | 2663 | /* submaps[0..nmaps-1] are the prefix definitions of KEYBUF[0..t-1] |
284f4730 | 2664 | in the current keymaps, or nil where it is not a prefix. */ |
253598e4 | 2665 | Lisp_Object *submaps; |
284f4730 JB |
2666 | |
2667 | /* defs[0..nmaps-1] are the definitions of KEYBUF[0..t-1] in | |
2668 | the current keymaps. */ | |
2669 | Lisp_Object *defs; | |
2670 | ||
253598e4 JB |
2671 | /* The index of the first keymap that has a binding for this key |
2672 | sequence. In other words, the lowest i such that defs[i] is | |
2673 | non-nil.*/ | |
284f4730 JB |
2674 | int first_binding; |
2675 | ||
2676 | /* If mock_input > t, then KEYBUF[t] should be read as the next | |
253598e4 JB |
2677 | input key. |
2678 | ||
2679 | We use this to recover after recognizing a function key. Once we | |
2680 | realize that a suffix of the current key sequence is actually a | |
2681 | function key's escape sequence, we replace the suffix with the | |
2682 | function key's binding from Vfunction_key_map. Now keybuf | |
2683 | contains a new and different key sequence, so the echo area and | |
2684 | the submaps and defs arrays are wrong. In this situation, we set | |
2685 | mock_input to t, set t to 0, and jump to restart; the loop will | |
2686 | read keys from keybuf up until mock_input, which rebuilds the | |
2687 | state, and then it will resume reading characters from the keyboard. */ | |
284f4730 JB |
2688 | int mock_input = 0; |
2689 | ||
253598e4 JB |
2690 | /* If the sequence is unbound in submaps[], then |
2691 | keymap[fkey_start..fkey_end-1] is a prefix in Vfunction_key_map, | |
2692 | and fkey_map is its binding. If mock_input is in use, these | |
2693 | might be > t, indicating that all function key scanning should | |
284f4730 | 2694 | hold off until t reaches them. */ |
253598e4 | 2695 | |
284f4730 JB |
2696 | int fkey_start = 0, fkey_end = 0; |
2697 | Lisp_Object fkey_map = Vfunction_key_map; | |
2698 | ||
7d6de002 RS |
2699 | last_nonmenu_event = Qnil; |
2700 | ||
284f4730 JB |
2701 | if (INTERACTIVE) |
2702 | { | |
2703 | if (prompt) | |
2704 | echo_prompt (prompt); | |
2705 | else if (cursor_in_echo_area) | |
2706 | /* This doesn't put in a dash if the echo buffer is empty, so | |
2707 | you don't always see a dash hanging out in the minibuffer. */ | |
2708 | echo_dash (); | |
2709 | echo_start = echo_length (); | |
2710 | } | |
2711 | ||
253598e4 | 2712 | /* If there is no function key map, turn off function key scanning. */ |
284f4730 JB |
2713 | if (NILP (Fkeymapp (Vfunction_key_map))) |
2714 | fkey_start = fkey_end = bufsize + 1; | |
2715 | ||
2716 | restart: | |
2717 | t = 0; | |
2718 | this_command_key_count = keys_start; | |
2719 | ||
2720 | { | |
2721 | Lisp_Object *maps; | |
2722 | ||
2723 | nmaps = current_minor_maps (0, &maps) + 2; | |
2724 | if (nmaps > nmaps_allocated) | |
2725 | { | |
253598e4 | 2726 | submaps = (Lisp_Object *) alloca (nmaps * sizeof (submaps[0])); |
284f4730 JB |
2727 | defs = (Lisp_Object *) alloca (nmaps * sizeof (defs[0])); |
2728 | nmaps_allocated = nmaps; | |
2729 | } | |
253598e4 JB |
2730 | bcopy (maps, submaps, (nmaps - 2) * sizeof (submaps[0])); |
2731 | submaps[nmaps-2] = last_event_buffer->keymap; | |
2732 | submaps[nmaps-1] = global_map; | |
284f4730 JB |
2733 | } |
2734 | ||
2735 | /* Find an accurate initial value for first_binding. */ | |
2736 | for (first_binding = 0; first_binding < nmaps; first_binding++) | |
253598e4 | 2737 | if (! NILP (submaps[first_binding])) |
284f4730 JB |
2738 | break; |
2739 | ||
253598e4 | 2740 | while ((first_binding < nmaps && ! NILP (submaps[first_binding])) |
284f4730 JB |
2741 | || (first_binding >= nmaps && fkey_start < t)) |
2742 | { | |
2743 | Lisp_Object key; | |
7d6de002 | 2744 | int used_mouse_menu = 0; |
284f4730 JB |
2745 | |
2746 | if (t >= bufsize) | |
2747 | error ("key sequence too long"); | |
2748 | ||
253598e4 | 2749 | /* Are we re-reading a key sequence, as indicated by mock_input? */ |
284f4730 JB |
2750 | if (t < mock_input) |
2751 | { | |
2752 | key = keybuf[t]; | |
2753 | add_command_key (key); | |
2754 | echo_char (key); | |
2755 | } | |
253598e4 JB |
2756 | |
2757 | /* If not, we should actually read a character. */ | |
284f4730 JB |
2758 | else |
2759 | { | |
2760 | struct buffer *buf; | |
2761 | ||
7d6de002 RS |
2762 | key = read_char (!prompt, nmaps, submaps, last_nonmenu_event, |
2763 | &used_mouse_menu); | |
284f4730 JB |
2764 | |
2765 | /* The above routines return -1 at the end of a macro. | |
2766 | Emacs 18 handles this by returning immediately with a | |
2767 | zero, so that's what we'll do. */ | |
2768 | if (XTYPE (key) == Lisp_Int && XINT (key) < 0) | |
2769 | return 0; | |
2770 | ||
2771 | Vquit_flag = Qnil; | |
2772 | ||
ff11dfa1 | 2773 | #ifdef MULTI_FRAME |
284f4730 | 2774 | /* What buffer was this event typed/moused at? */ |
7d6de002 RS |
2775 | if (used_mouse_menu) |
2776 | /* Never change last_event_buffer for using a menu. */ | |
2777 | buf = last_event_buffer; | |
2778 | else if (XTYPE (key) == Lisp_Int || XTYPE (key) == Lisp_Symbol) | |
fce33686 JB |
2779 | { |
2780 | buf = ((XTYPE (Vlast_event_frame) == Lisp_Frame) | |
2781 | ? (XBUFFER | |
2782 | (XWINDOW | |
2783 | (FRAME_SELECTED_WINDOW | |
2784 | (XFRAME (Vlast_event_frame)))->buffer)) | |
2785 | : last_event_buffer); | |
2786 | } | |
284f4730 JB |
2787 | else if (EVENT_HAS_PARAMETERS (key)) |
2788 | { | |
2789 | Lisp_Object window = EVENT_WINDOW (key); | |
2790 | ||
2791 | if (NILP (window)) | |
2792 | abort (); | |
2793 | ||
2794 | buf = XBUFFER (XWINDOW (window)->buffer); | |
2795 | } | |
2796 | else | |
2797 | abort (); | |
2798 | ||
2799 | /* If this event came to a different buffer than the one | |
2800 | we're currently in, switch buffers and start a new key | |
2801 | sequence, starting with key. */ | |
2802 | if (buf != last_event_buffer) | |
2803 | { | |
2804 | last_event_buffer = buf; | |
ff11dfa1 | 2805 | Fselect_frame (Vlast_event_frame, Qnil); |
284f4730 JB |
2806 | |
2807 | /* Arrange to read key as the next event. */ | |
2808 | keybuf[0] = key; | |
2809 | mock_input = 1; | |
2810 | ||
2811 | /* Truncate the key sequence in the echo area. */ | |
2812 | if (INTERACTIVE) | |
2813 | echo_truncate (echo_start); | |
2814 | ||
2815 | goto restart; | |
2816 | } | |
e5d77022 | 2817 | #endif |
284f4730 JB |
2818 | } |
2819 | ||
2820 | first_binding = (follow_key (key, | |
2821 | nmaps - first_binding, | |
253598e4 | 2822 | submaps + first_binding, |
284f4730 | 2823 | defs + first_binding, |
253598e4 | 2824 | submaps + first_binding) |
284f4730 JB |
2825 | + first_binding); |
2826 | keybuf[t++] = key; | |
7d6de002 RS |
2827 | /* Normally, last_nonmenu_event gets the previous key we read. |
2828 | But when a mouse popup menu is being used, | |
2829 | we don't update last_nonmenu_event; it continues to hold the mouse | |
2830 | event that preceded the first level of menu. */ | |
2831 | if (!used_mouse_menu) | |
2832 | last_nonmenu_event = key; | |
284f4730 JB |
2833 | |
2834 | /* If the sequence is unbound, see if we can hang a function key | |
253598e4 JB |
2835 | off the end of it. We only want to scan real keyboard input |
2836 | for function key sequences, so if mock_input says that we're | |
2837 | re-scanning after expanding a function key, don't examine it. */ | |
284f4730 | 2838 | if (first_binding >= nmaps |
253598e4 | 2839 | && t >= mock_input) |
284f4730 JB |
2840 | { |
2841 | Lisp_Object fkey_next; | |
2842 | ||
2843 | /* Scan from fkey_end until we find a bound suffix. */ | |
2844 | while (fkey_end < t) | |
2845 | { | |
067ffa38 JB |
2846 | /* Look up meta-characters by prefixing them |
2847 | with meta_prefix_char. I hate this. */ | |
253598e4 | 2848 | if (keybuf[fkey_end] & 0x80) |
067ffa38 JB |
2849 | fkey_next = |
2850 | get_keymap_1 (get_keyelt | |
2851 | (access_keymap (fkey_map, meta_prefix_char)), | |
2852 | 0); | |
2853 | else | |
2854 | fkey_next = fkey_map; | |
2855 | ||
284f4730 | 2856 | fkey_next = |
067ffa38 | 2857 | get_keyelt (access_keymap |
85bc5181 | 2858 | (fkey_next, keybuf[fkey_end++] & 0x7f)); |
067ffa38 | 2859 | |
85bc5181 | 2860 | /* If keybuf[fkey_start..fkey_end] is bound in the |
a764a753 | 2861 | function key map and it's a suffix of the current |
85bc5181 | 2862 | sequence (i.e. fkey_end == t), replace it with |
a764a753 | 2863 | the binding and restart with fkey_start at the end. */ |
284f4730 JB |
2864 | if (XTYPE (fkey_next) == Lisp_Vector |
2865 | && fkey_end == t) | |
2866 | { | |
2867 | t = fkey_start + XVECTOR (fkey_next)->size; | |
2868 | if (t >= bufsize) | |
2869 | error ("key sequence too long"); | |
2870 | ||
2871 | bcopy (XVECTOR (fkey_next)->contents, | |
2872 | keybuf + fkey_start, | |
2873 | (t - fkey_start) * sizeof (keybuf[0])); | |
2874 | ||
2875 | mock_input = t; | |
2876 | fkey_start = fkey_end = t; | |
2877 | ||
2878 | /* Truncate the key sequence in the echo area. */ | |
2879 | if (INTERACTIVE) | |
2880 | echo_truncate (echo_start); | |
2881 | ||
2882 | goto restart; | |
2883 | } | |
2884 | ||
2885 | fkey_map = get_keymap_1 (fkey_next, 0); | |
2886 | ||
a764a753 JB |
2887 | /* If we no longer have a bound suffix, try a new positions for |
2888 | fkey_start. */ | |
284f4730 JB |
2889 | if (NILP (fkey_map)) |
2890 | { | |
2891 | fkey_end = ++fkey_start; | |
2892 | fkey_map = Vfunction_key_map; | |
2893 | } | |
2894 | } | |
2895 | } | |
2896 | } | |
2897 | ||
2898 | read_key_sequence_cmd = (first_binding < nmaps | |
2899 | ? defs[first_binding] | |
2900 | : Qnil); | |
2901 | ||
2902 | return t; | |
2903 | } | |
2904 | ||
c0a58692 | 2905 | DEFUN ("read-key-sequence", Fread_key_sequence, Sread_key_sequence, 1, 2, 0, |
284f4730 JB |
2906 | "Read a sequence of keystrokes and return as a string or vector.\n\ |
2907 | The sequence is sufficient to specify a non-prefix command in the\n\ | |
2908 | current local and global maps.\n\ | |
2909 | \n\ | |
c0a58692 RS |
2910 | First arg PROMPT is a prompt string. If nil, do not prompt specially.\n\ |
2911 | Second (optional) arg CONTINUE-ECHO, if non-nil, means this key echos\n\ | |
2912 | as a continuation of the previous key.\n\ | |
284f4730 | 2913 | \n\ |
ff11dfa1 | 2914 | If Emacs is running on multiple frames, switching between frames in\n\ |
284f4730 JB |
2915 | the midst of a keystroke will toss any prefix typed so far. A C-g\n\ |
2916 | typed while in this function is treated like any other character, and\n\ | |
2917 | `quit-flag' is not set.") | |
c0a58692 RS |
2918 | (prompt, continue_echo) |
2919 | Lisp_Object prompt, continue_echo; | |
284f4730 JB |
2920 | { |
2921 | Lisp_Object keybuf[30]; | |
2922 | register int i; | |
2923 | struct gcpro gcpro1, gcpro2; | |
2924 | ||
2925 | if (!NILP (prompt)) | |
2926 | CHECK_STRING (prompt, 0); | |
2927 | QUIT; | |
2928 | ||
2929 | bzero (keybuf, sizeof keybuf); | |
2930 | GCPRO1 (keybuf[0]); | |
2931 | gcpro1.nvars = (sizeof keybuf/sizeof (keybuf[0])); | |
2932 | ||
daa37602 | 2933 | if (NILP (continue_echo)) |
c0a58692 RS |
2934 | this_command_key_count = 0; |
2935 | ||
284f4730 JB |
2936 | i = read_key_sequence (keybuf, (sizeof keybuf/sizeof (keybuf[0])), |
2937 | NILP (prompt) ? 0 : XSTRING (prompt)->data); | |
2938 | ||
2939 | UNGCPRO; | |
2940 | return make_array (i, keybuf); | |
2941 | } | |
2942 | \f | |
2943 | DEFUN ("command-execute", Fcommand_execute, Scommand_execute, 1, 2, 0, | |
2944 | "Execute CMD as an editor command.\n\ | |
2945 | CMD must be a symbol that satisfies the `commandp' predicate.\n\ | |
2946 | Optional second arg RECORD-FLAG non-nil\n\ | |
2947 | means unconditionally put this command in `command-history'.\n\ | |
2948 | Otherwise, that is done only if an arg is read using the minibuffer.") | |
2949 | (cmd, record) | |
2950 | Lisp_Object cmd, record; | |
2951 | { | |
2952 | register Lisp_Object final; | |
2953 | register Lisp_Object tem; | |
2954 | Lisp_Object prefixarg; | |
2955 | struct backtrace backtrace; | |
2956 | extern int debug_on_next_call; | |
2957 | ||
2958 | prefixarg = Vprefix_arg, Vprefix_arg = Qnil; | |
2959 | Vcurrent_prefix_arg = prefixarg; | |
2960 | debug_on_next_call = 0; | |
2961 | ||
2962 | if (XTYPE (cmd) == Lisp_Symbol) | |
2963 | { | |
2964 | tem = Fget (cmd, Qdisabled); | |
2965 | if (!NILP (tem)) | |
2966 | return call1 (Vrun_hooks, Vdisabled_command_hook); | |
2967 | } | |
2968 | ||
2969 | while (1) | |
2970 | { | |
ffd56f97 | 2971 | final = Findirect_function (cmd); |
284f4730 JB |
2972 | |
2973 | if (CONSP (final) && (tem = Fcar (final), EQ (tem, Qautoload))) | |
2974 | do_autoload (final, cmd); | |
2975 | else | |
2976 | break; | |
2977 | } | |
2978 | ||
2979 | if (XTYPE (final) == Lisp_String | |
2980 | || XTYPE (final) == Lisp_Vector) | |
2981 | { | |
2982 | /* If requested, place the macro in the command history. For | |
2983 | other sorts of commands, call-interactively takes care of | |
2984 | this. */ | |
2985 | if (!NILP (record)) | |
2986 | Vcommand_history | |
2987 | = Fcons (Fcons (Qexecute_kbd_macro, | |
2988 | Fcons (final, Fcons (prefixarg, Qnil))), | |
2989 | Vcommand_history); | |
2990 | ||
2991 | return Fexecute_kbd_macro (final, prefixarg); | |
2992 | } | |
2993 | if (CONSP (final) || XTYPE (final) == Lisp_Subr | |
2994 | || XTYPE (final) == Lisp_Compiled) | |
2995 | { | |
2996 | backtrace.next = backtrace_list; | |
2997 | backtrace_list = &backtrace; | |
2998 | backtrace.function = &Qcall_interactively; | |
2999 | backtrace.args = &cmd; | |
3000 | backtrace.nargs = 1; | |
3001 | backtrace.evalargs = 0; | |
3002 | ||
3003 | tem = Fcall_interactively (cmd, record); | |
3004 | ||
3005 | backtrace_list = backtrace.next; | |
3006 | return tem; | |
3007 | } | |
3008 | return Qnil; | |
3009 | } | |
3010 | \f | |
284f4730 JB |
3011 | DEFUN ("execute-extended-command", Fexecute_extended_command, Sexecute_extended_command, |
3012 | 1, 1, "P", | |
3013 | "Read function name, then read its arguments and call it.") | |
3014 | (prefixarg) | |
3015 | Lisp_Object prefixarg; | |
3016 | { | |
3017 | Lisp_Object function; | |
3018 | char buf[40]; | |
3019 | Lisp_Object saved_keys; | |
3020 | struct gcpro gcpro1; | |
3021 | ||
3022 | saved_keys = Fthis_command_keys (); | |
3023 | buf[0] = 0; | |
3024 | GCPRO1 (saved_keys); | |
3025 | ||
3026 | if (EQ (prefixarg, Qminus)) | |
3027 | strcpy (buf, "- "); | |
3028 | else if (CONSP (prefixarg) && XINT (XCONS (prefixarg)->car) == 4) | |
3029 | strcpy (buf, "C-u "); | |
3030 | else if (CONSP (prefixarg) && XTYPE (XCONS (prefixarg)->car) == Lisp_Int) | |
3031 | sprintf (buf, "%d ", XINT (XCONS (prefixarg)->car)); | |
3032 | else if (XTYPE (prefixarg) == Lisp_Int) | |
3033 | sprintf (buf, "%d ", XINT (prefixarg)); | |
3034 | ||
3035 | /* This isn't strictly correct if execute-extended-command | |
3036 | is bound to anything else. Perhaps it should use | |
3037 | this_command_keys? */ | |
3038 | strcat (buf, "M-x "); | |
3039 | ||
3040 | /* Prompt with buf, and then read a string, completing from and | |
3041 | restricting to the set of all defined commands. Don't provide | |
3042 | any initial input. The last Qnil says not to perform a | |
3043 | peculiar hack on the initial input. */ | |
3044 | function = Fcompleting_read (build_string (buf), | |
3045 | Vobarray, Qcommandp, | |
3046 | Qt, Qnil, Qnil); | |
3047 | ||
1113d9db JB |
3048 | /* Set this_command_keys to the concatenation of saved_keys and |
3049 | function, followed by a RET. */ | |
284f4730 | 3050 | { |
1113d9db | 3051 | struct Lisp_String *str; |
284f4730 JB |
3052 | int i; |
3053 | Lisp_Object tem; | |
3054 | ||
1113d9db JB |
3055 | this_command_key_count = 0; |
3056 | ||
3057 | str = XSTRING (saved_keys); | |
3058 | for (i = 0; i < str->size; i++) | |
284f4730 | 3059 | { |
1113d9db | 3060 | XFASTINT (tem) = str->data[i]; |
284f4730 JB |
3061 | add_command_key (tem); |
3062 | } | |
1113d9db JB |
3063 | |
3064 | str = XSTRING (function); | |
3065 | for (i = 0; i < str->size; i++) | |
3066 | { | |
3067 | XFASTINT (tem) = str->data[i]; | |
3068 | add_command_key (tem); | |
3069 | } | |
3070 | ||
3071 | XFASTINT (tem) = '\015'; | |
3072 | add_command_key (tem); | |
284f4730 JB |
3073 | } |
3074 | ||
3075 | UNGCPRO; | |
3076 | ||
3077 | function = Fintern (function, Vobarray); | |
3078 | Vprefix_arg = prefixarg; | |
3079 | this_command = function; | |
3080 | ||
3081 | return Fcommand_execute (function, Qt); | |
3082 | } | |
3083 | \f | |
3084 | ||
3085 | detect_input_pending () | |
3086 | { | |
3087 | if (!input_pending) | |
3088 | get_input_pending (&input_pending); | |
3089 | ||
3090 | return input_pending; | |
3091 | } | |
3092 | ||
ffd56f97 JB |
3093 | /* This is called in some cases before a possible quit. |
3094 | It cases the next call to detect_input_pending to recompute input_pending. | |
3095 | So calling this function unnecessarily can't do any harm. */ | |
3096 | clear_input_pending () | |
3097 | { | |
3098 | input_pending = 0; | |
3099 | } | |
3100 | ||
284f4730 JB |
3101 | DEFUN ("input-pending-p", Finput_pending_p, Sinput_pending_p, 0, 0, 0, |
3102 | "T if command input is currently available with no waiting.\n\ | |
3103 | Actually, the value is nil only if we can be sure that no input is available.") | |
3104 | () | |
3105 | { | |
3106 | if (!NILP (unread_command_char)) | |
3107 | return (Qt); | |
3108 | ||
3109 | return detect_input_pending () ? Qt : Qnil; | |
3110 | } | |
3111 | ||
3112 | DEFUN ("recent-keys", Frecent_keys, Srecent_keys, 0, 0, 0, | |
daa37602 | 3113 | "Return vector of last 100 chars read from terminal.") |
284f4730 JB |
3114 | () |
3115 | { | |
3116 | Lisp_Object val; | |
3117 | ||
3118 | if (total_keys < NUM_RECENT_KEYS) | |
3119 | return Fvector (total_keys, recent_keys); | |
3120 | else | |
3121 | { | |
3122 | val = Fvector (NUM_RECENT_KEYS, recent_keys); | |
3123 | bcopy (recent_keys + recent_keys_index, | |
3124 | XVECTOR (val)->contents, | |
3125 | (NUM_RECENT_KEYS - recent_keys_index) * sizeof (Lisp_Object)); | |
3126 | bcopy (recent_keys, | |
3127 | XVECTOR (val)->contents + NUM_RECENT_KEYS - recent_keys_index, | |
3128 | recent_keys_index * sizeof (Lisp_Object)); | |
3129 | return val; | |
3130 | } | |
3131 | } | |
3132 | ||
3133 | DEFUN ("this-command-keys", Fthis_command_keys, Sthis_command_keys, 0, 0, 0, | |
3134 | "Return string of the keystrokes that invoked this command.") | |
3135 | () | |
3136 | { | |
3137 | return make_array (this_command_key_count, this_command_keys); | |
3138 | } | |
3139 | ||
3140 | DEFUN ("recursion-depth", Frecursion_depth, Srecursion_depth, 0, 0, 0, | |
3141 | "Return the current depth in recursive edits.") | |
3142 | () | |
3143 | { | |
3144 | Lisp_Object temp; | |
3145 | XFASTINT (temp) = command_loop_level + minibuf_level; | |
3146 | return temp; | |
3147 | } | |
3148 | ||
3149 | DEFUN ("open-dribble-file", Fopen_dribble_file, Sopen_dribble_file, 1, 1, | |
3150 | "FOpen dribble file: ", | |
3151 | "Start writing all keyboard characters to FILE.") | |
3152 | (file) | |
3153 | Lisp_Object file; | |
3154 | { | |
3155 | if (NILP (file)) | |
3156 | { | |
3157 | fclose (dribble); | |
3158 | dribble = 0; | |
3159 | } | |
3160 | else | |
3161 | { | |
3162 | file = Fexpand_file_name (file, Qnil); | |
3163 | dribble = fopen (XSTRING (file)->data, "w"); | |
3164 | } | |
3165 | return Qnil; | |
3166 | } | |
3167 | ||
3168 | DEFUN ("discard-input", Fdiscard_input, Sdiscard_input, 0, 0, 0, | |
3169 | "Discard the contents of the terminal input buffer.\n\ | |
3170 | Also cancel any kbd macro being defined.") | |
3171 | () | |
3172 | { | |
3173 | defining_kbd_macro = 0; | |
3174 | update_mode_lines++; | |
3175 | ||
284f4730 JB |
3176 | unread_command_char = Qnil; |
3177 | ||
3178 | discard_tty_input (); | |
3179 | ||
3180 | kbd_fetch_ptr = kbd_store_ptr; | |
3181 | input_pending = 0; | |
3182 | ||
3183 | return Qnil; | |
3184 | } | |
3185 | \f | |
3186 | DEFUN ("suspend-emacs", Fsuspend_emacs, Ssuspend_emacs, 0, 1, "", | |
3187 | "Stop Emacs and return to superior process. You can resume later.\n\ | |
3188 | On systems that don't have job control, run a subshell instead.\n\n\ | |
3189 | If optional arg STUFFSTRING is non-nil, its characters are stuffed\n\ | |
3190 | to be read as terminal input by Emacs's superior shell.\n\ | |
3191 | Before suspending, if `suspend-hook' is bound and value is non-nil\n\ | |
3192 | call the value as a function of no args. Don't suspend if it returns non-nil.\n\ | |
3193 | Otherwise, suspend normally and after resumption call\n\ | |
3194 | `suspend-resume-hook' if that is bound and non-nil.\n\ | |
3195 | \n\ | |
3196 | Some operating systems cannot stop the Emacs process and resume it later.\n\ | |
3197 | On such systems, Emacs will start a subshell and wait for it to exit.") | |
3198 | (stuffstring) | |
3199 | Lisp_Object stuffstring; | |
3200 | { | |
3201 | register Lisp_Object tem; | |
3202 | int count = specpdl_ptr - specpdl; | |
3203 | int old_height, old_width; | |
3204 | int width, height; | |
3205 | struct gcpro gcpro1; | |
3206 | extern init_sys_modes (); | |
3207 | ||
3208 | if (!NILP (stuffstring)) | |
3209 | CHECK_STRING (stuffstring, 0); | |
3210 | GCPRO1 (stuffstring); | |
3211 | ||
3212 | /* Call value of suspend-hook | |
3213 | if it is bound and value is non-nil. */ | |
3214 | if (!NILP (Vrun_hooks)) | |
3215 | { | |
3216 | tem = call1 (Vrun_hooks, intern ("suspend-hook")); | |
3217 | if (!EQ (tem, Qnil)) return Qnil; | |
3218 | } | |
3219 | ||
ff11dfa1 | 3220 | get_frame_size (&old_width, &old_height); |
284f4730 JB |
3221 | reset_sys_modes (); |
3222 | /* sys_suspend can get an error if it tries to fork a subshell | |
3223 | and the system resources aren't available for that. */ | |
3224 | record_unwind_protect (init_sys_modes, 0); | |
3225 | stuff_buffered_input (stuffstring); | |
3226 | sys_suspend (); | |
3227 | unbind_to (count, Qnil); | |
3228 | ||
3229 | /* Check if terminal/window size has changed. | |
3230 | Note that this is not useful when we are running directly | |
3231 | with a window system; but suspend should be disabled in that case. */ | |
ff11dfa1 | 3232 | get_frame_size (&width, &height); |
284f4730 | 3233 | if (width != old_width || height != old_height) |
d5045cf9 | 3234 | change_frame_size (0, height, width, 0, 0); |
284f4730 JB |
3235 | |
3236 | /* Call value of suspend-resume-hook | |
3237 | if it is bound and value is non-nil. */ | |
3238 | if (!NILP (Vrun_hooks)) | |
3239 | call1 (Vrun_hooks, intern ("suspend-resume-hook")); | |
3240 | ||
3241 | UNGCPRO; | |
3242 | return Qnil; | |
3243 | } | |
3244 | ||
3245 | /* If STUFFSTRING is a string, stuff its contents as pending terminal input. | |
3246 | Then in any case stuff anthing Emacs has read ahead and not used. */ | |
3247 | ||
3248 | stuff_buffered_input (stuffstring) | |
3249 | Lisp_Object stuffstring; | |
3250 | { | |
3251 | register unsigned char *p; | |
3252 | ||
3253 | /* stuff_char works only in BSD, versions 4.2 and up. */ | |
3254 | #ifdef BSD | |
3255 | #ifndef BSD4_1 | |
3256 | if (XTYPE (stuffstring) == Lisp_String) | |
3257 | { | |
3258 | register int count; | |
3259 | ||
3260 | p = XSTRING (stuffstring)->data; | |
3261 | count = XSTRING (stuffstring)->size; | |
3262 | while (count-- > 0) | |
3263 | stuff_char (*p++); | |
3264 | stuff_char ('\n'); | |
3265 | } | |
3266 | /* Anything we have read ahead, put back for the shell to read. */ | |
3267 | while (kbd_fetch_ptr != kbd_store_ptr) | |
3268 | { | |
3269 | if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE) | |
3270 | kbd_fetch_ptr = kbd_buffer; | |
3271 | if (kbd_fetch_ptr->kind == ascii_keystroke) | |
3272 | stuff_char (XINT (kbd_fetch_ptr->code)); | |
3273 | kbd_fetch_ptr++; | |
3274 | } | |
3275 | input_pending = 0; | |
3276 | #endif | |
3277 | #endif /* BSD and not BSD4_1 */ | |
3278 | } | |
3279 | \f | |
ffd56f97 JB |
3280 | set_waiting_for_input (time_to_clear) |
3281 | EMACS_TIME *time_to_clear; | |
284f4730 | 3282 | { |
ffd56f97 | 3283 | input_available_clear_time = time_to_clear; |
284f4730 JB |
3284 | |
3285 | /* Tell interrupt_signal to throw back to read_char, */ | |
3286 | waiting_for_input = 1; | |
3287 | ||
3288 | /* If interrupt_signal was called before and buffered a C-g, | |
3289 | make it run again now, to avoid timing error. */ | |
3290 | if (!NILP (Vquit_flag)) | |
3291 | quit_throw_to_read_char (); | |
3292 | ||
3293 | /* If alarm has gone off already, echo now. */ | |
3294 | if (echo_flag) | |
3295 | { | |
3296 | echo (); | |
3297 | echo_flag = 0; | |
3298 | } | |
3299 | } | |
3300 | ||
3301 | clear_waiting_for_input () | |
3302 | { | |
3303 | /* Tell interrupt_signal not to throw back to read_char, */ | |
3304 | waiting_for_input = 0; | |
ffd56f97 | 3305 | input_available_clear_time = 0; |
284f4730 JB |
3306 | } |
3307 | ||
3308 | /* This routine is called at interrupt level in response to C-G. | |
3309 | If interrupt_input, this is the handler for SIGINT. | |
3310 | Otherwise, it is called from kbd_buffer_store_event, | |
3311 | in handling SIGIO or SIGTINT. | |
3312 | ||
3313 | If `waiting_for_input' is non zero, then unless `echoing' is nonzero, | |
3314 | immediately throw back to read_char. | |
3315 | ||
3316 | Otherwise it sets the Lisp variable quit-flag not-nil. | |
3317 | This causes eval to throw, when it gets a chance. | |
3318 | If quit-flag is already non-nil, it stops the job right away. */ | |
3319 | ||
3320 | SIGTYPE | |
3321 | interrupt_signal () | |
3322 | { | |
3323 | char c; | |
3324 | /* Must preserve main program's value of errno. */ | |
3325 | int old_errno = errno; | |
3326 | extern Lisp_Object Vwindow_system; | |
3327 | ||
3328 | #ifdef USG | |
3329 | /* USG systems forget handlers when they are used; | |
3330 | must reestablish each time */ | |
3331 | signal (SIGINT, interrupt_signal); | |
3332 | signal (SIGQUIT, interrupt_signal); | |
3333 | #endif /* USG */ | |
3334 | ||
3335 | cancel_echoing (); | |
3336 | ||
d5045cf9 | 3337 | if (!NILP (Vquit_flag) && FRAME_TERMCAP_P (selected_frame)) |
284f4730 JB |
3338 | { |
3339 | fflush (stdout); | |
3340 | reset_sys_modes (); | |
3341 | sigfree (); | |
3342 | #ifdef SIGTSTP /* Support possible in later USG versions */ | |
3343 | /* | |
3344 | * On systems which can suspend the current process and return to the original | |
3345 | * shell, this command causes the user to end up back at the shell. | |
3346 | * The "Auto-save" and "Abort" questions are not asked until | |
3347 | * the user elects to return to emacs, at which point he can save the current | |
3348 | * job and either dump core or continue. | |
3349 | */ | |
3350 | sys_suspend (); | |
3351 | #else | |
3352 | #ifdef VMS | |
3353 | if (sys_suspend () == -1) | |
3354 | { | |
3355 | printf ("Not running as a subprocess;\n"); | |
3356 | printf ("you can continue or abort.\n"); | |
3357 | } | |
3358 | #else /* not VMS */ | |
3359 | /* Perhaps should really fork an inferior shell? | |
3360 | But that would not provide any way to get back | |
3361 | to the original shell, ever. */ | |
3362 | printf ("No support for stopping a process on this operating system;\n"); | |
3363 | printf ("you can continue or abort.\n"); | |
3364 | #endif /* not VMS */ | |
3365 | #endif /* not SIGTSTP */ | |
3366 | printf ("Auto-save? (y or n) "); | |
3367 | fflush (stdout); | |
3368 | if (((c = getchar ()) & ~040) == 'Y') | |
3369 | Fdo_auto_save (Qnil, Qnil); | |
3370 | while (c != '\n') c = getchar (); | |
3371 | #ifdef VMS | |
3372 | printf ("Abort (and enter debugger)? (y or n) "); | |
3373 | #else /* not VMS */ | |
3374 | printf ("Abort (and dump core)? (y or n) "); | |
3375 | #endif /* not VMS */ | |
3376 | fflush (stdout); | |
3377 | if (((c = getchar ()) & ~040) == 'Y') | |
3378 | abort (); | |
3379 | while (c != '\n') c = getchar (); | |
3380 | printf ("Continuing...\n"); | |
3381 | fflush (stdout); | |
3382 | init_sys_modes (); | |
3383 | } | |
3384 | else | |
3385 | { | |
3386 | /* If executing a function that wants to be interrupted out of | |
3387 | and the user has not deferred quitting by binding `inhibit-quit' | |
3388 | then quit right away. */ | |
3389 | if (immediate_quit && NILP (Vinhibit_quit)) | |
3390 | { | |
3391 | immediate_quit = 0; | |
3392 | sigfree (); | |
3393 | Fsignal (Qquit, Qnil); | |
3394 | } | |
3395 | else | |
3396 | /* Else request quit when it's safe */ | |
3397 | Vquit_flag = Qt; | |
3398 | } | |
3399 | ||
3400 | if (waiting_for_input && !echoing) | |
3401 | quit_throw_to_read_char (); | |
3402 | ||
3403 | errno = old_errno; | |
3404 | } | |
3405 | ||
3406 | /* Handle a C-g by making read_char return C-g. */ | |
3407 | ||
3408 | quit_throw_to_read_char () | |
3409 | { | |
3410 | quit_error_check (); | |
3411 | sigfree (); | |
3412 | /* Prevent another signal from doing this before we finish. */ | |
f76475ad | 3413 | clear_waiting_for_input (); |
284f4730 JB |
3414 | input_pending = 0; |
3415 | ||
284f4730 JB |
3416 | unread_command_char = Qnil; |
3417 | ||
3418 | _longjmp (getcjmp, 1); | |
3419 | } | |
3420 | \f | |
3421 | DEFUN ("set-input-mode", Fset_input_mode, Sset_input_mode, 3, 4, 0, | |
3422 | "Set mode of reading keyboard input.\n\ | |
464f8898 RS |
3423 | First arg INTERRUPT non-nil means use input interrupts;\n\ |
3424 | nil means use CBREAK mode.\n\ | |
3425 | Second arg FLOW non-nil means use ^S/^Q flow control for output to terminal\n\ | |
284f4730 | 3426 | (no effect except in CBREAK mode).\n\ |
464f8898 | 3427 | Third arg META non-nil means accept 8-bit input (for a Meta key).\n\ |
284f4730 | 3428 | Otherwise, the top bit is ignored, on the assumption it is parity.\n\ |
464f8898 | 3429 | Optional fourth arg QUIT if non-nil specifies character to use for quitting.") |
284f4730 JB |
3430 | (interrupt, flow, meta, quit) |
3431 | Lisp_Object interrupt, flow, meta, quit; | |
3432 | { | |
3433 | if (!NILP (quit) | |
3434 | && (XTYPE (quit) != Lisp_Int | |
3435 | || XINT (quit) < 0 || XINT (quit) > 0400)) | |
3436 | error ("set-input-mode: QUIT must be an ASCII character."); | |
3437 | ||
3438 | reset_sys_modes (); | |
3439 | #ifdef SIGIO | |
3440 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
3441 | #ifdef NO_SOCK_SIGIO | |
3442 | if (read_socket_hook) | |
3443 | interrupt_input = 0; /* No interrupts if reading from a socket. */ | |
3444 | else | |
3445 | #endif /* NO_SOCK_SIGIO */ | |
3446 | interrupt_input = !NILP (interrupt); | |
3447 | #else /* not SIGIO */ | |
3448 | interrupt_input = 0; | |
3449 | #endif /* not SIGIO */ | |
3450 | /* Our VMS input only works by interrupts, as of now. */ | |
3451 | #ifdef VMS | |
3452 | interrupt_input = 1; | |
3453 | #endif | |
3454 | flow_control = !NILP (flow); | |
3455 | meta_key = !NILP (meta); | |
3456 | if (!NILP (quit)) | |
3457 | /* Don't let this value be out of range. */ | |
3458 | quit_char = XINT (quit) & (meta_key ? 0377 : 0177); | |
3459 | ||
3460 | init_sys_modes (); | |
3461 | return Qnil; | |
3462 | } | |
3463 | \f | |
3464 | init_keyboard () | |
3465 | { | |
3466 | this_command_keys_size = 40; | |
3467 | this_command_keys = | |
3468 | (Lisp_Object *) xmalloc (this_command_keys_size * sizeof (Lisp_Object)); | |
3469 | ||
3470 | /* This is correct before outermost invocation of the editor loop */ | |
3471 | command_loop_level = -1; | |
3472 | immediate_quit = 0; | |
3473 | quit_char = Ctl ('g'); | |
3474 | unread_command_char = Qnil; | |
3475 | recent_keys_index = 0; | |
3476 | total_keys = 0; | |
3477 | kbd_fetch_ptr = kbd_buffer; | |
3478 | kbd_store_ptr = kbd_buffer; | |
3479 | do_mouse_tracking = 0; | |
3480 | input_pending = 0; | |
3481 | ||
3482 | if (!noninteractive) | |
3483 | { | |
3484 | signal (SIGINT, interrupt_signal); | |
3485 | #ifdef HAVE_TERMIO | |
3486 | /* For systems with SysV TERMIO, C-g is set up for both SIGINT and | |
3487 | SIGQUIT and we can't tell which one it will give us. */ | |
3488 | signal (SIGQUIT, interrupt_signal); | |
3489 | #endif /* HAVE_TERMIO */ | |
3490 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
3491 | #ifdef SIGIO | |
3492 | signal (SIGIO, input_available_signal); | |
8ea0a720 | 3493 | #endif /* SIGIO */ |
284f4730 JB |
3494 | } |
3495 | ||
3496 | /* Use interrupt input by default, if it works and noninterrupt input | |
3497 | has deficiencies. */ | |
3498 | ||
3499 | #ifdef INTERRUPT_INPUT | |
3500 | interrupt_input = 1; | |
3501 | #else | |
3502 | interrupt_input = 0; | |
3503 | #endif | |
3504 | ||
3505 | /* Our VMS input only works by interrupts, as of now. */ | |
3506 | #ifdef VMS | |
3507 | interrupt_input = 1; | |
3508 | #endif | |
3509 | ||
3510 | sigfree (); | |
3511 | dribble = 0; | |
3512 | ||
3513 | if (keyboard_init_hook) | |
3514 | (*keyboard_init_hook) (); | |
3515 | ||
3516 | #ifdef POLL_FOR_INPUT | |
3517 | poll_suppress_count = 1; | |
3518 | start_polling (); | |
3519 | #endif | |
3520 | } | |
3521 | ||
3522 | /* This type's only use is in syms_of_keyboard, to initialize the | |
3523 | event header symbols and put properties on them. */ | |
3524 | struct event_head { | |
3525 | Lisp_Object *var; | |
3526 | char *name; | |
3527 | Lisp_Object *kind; | |
3528 | }; | |
3529 | ||
3530 | struct event_head head_table[] = { | |
3531 | &Qmouse_movement, "mouse-movement", &Qmouse_movement, | |
3532 | &Qvscrollbar_part, "vscrollbar-part", &Qscrollbar_click, | |
3533 | &Qvslider_part, "vslider-part", &Qscrollbar_click, | |
3534 | &Qvthumbup_part, "vthumbup-part", &Qscrollbar_click, | |
3535 | &Qvthumbdown_part, "vthumbdown-part", &Qscrollbar_click, | |
3536 | &Qhscrollbar_part, "hscrollbar-part", &Qscrollbar_click, | |
3537 | &Qhslider_part, "hslider-part", &Qscrollbar_click, | |
3538 | &Qhthumbleft_part, "hthumbleft-part", &Qscrollbar_click, | |
3539 | &Qhthumbright_part,"hthumbright-part", &Qscrollbar_click | |
3540 | }; | |
3541 | ||
3542 | syms_of_keyboard () | |
3543 | { | |
3544 | Qself_insert_command = intern ("self-insert-command"); | |
3545 | staticpro (&Qself_insert_command); | |
3546 | ||
3547 | Qforward_char = intern ("forward-char"); | |
3548 | staticpro (&Qforward_char); | |
3549 | ||
3550 | Qbackward_char = intern ("backward-char"); | |
3551 | staticpro (&Qbackward_char); | |
3552 | ||
3553 | Qdisabled = intern ("disabled"); | |
3554 | staticpro (&Qdisabled); | |
3555 | ||
3556 | Qfunction_key = intern ("function-key"); | |
3557 | staticpro (&Qfunction_key); | |
3558 | Qmouse_movement = intern ("mouse-click"); | |
3559 | staticpro (&Qmouse_click); | |
3560 | Qmouse_movement = intern ("scrollbar-click"); | |
3561 | staticpro (&Qmouse_movement); | |
3562 | ||
3563 | Qmode_line = intern ("mode-line"); | |
3564 | staticpro (&Qmode_line); | |
e5d77022 JB |
3565 | Qvertical_line = intern ("vertical-line"); |
3566 | staticpro (&Qvertical_line); | |
284f4730 JB |
3567 | |
3568 | Qevent_kind = intern ("event-type"); | |
3569 | staticpro (&Qevent_kind); | |
3570 | Qevent_unmodified = intern ("event-unmodified"); | |
3571 | staticpro (&Qevent_unmodified); | |
3572 | ||
3573 | { | |
3574 | struct event_head *p; | |
3575 | ||
3576 | for (p = head_table; | |
3577 | p < head_table + (sizeof (head_table) / sizeof (head_table[0])); | |
3578 | p++) | |
3579 | { | |
3580 | *p->var = intern (p->name); | |
3581 | staticpro (p->var); | |
3582 | Fput (*p->var, Qevent_kind, *p->kind); | |
3583 | Fput (*p->var, Qevent_unmodified, *p->var); | |
3584 | } | |
3585 | } | |
3586 | ||
3587 | func_key_syms = Qnil; | |
3588 | staticpro (&func_key_syms); | |
3589 | ||
3590 | mouse_syms = Qnil; | |
3591 | staticpro (&mouse_syms); | |
3592 | ||
3593 | defsubr (&Sread_key_sequence); | |
3594 | defsubr (&Srecursive_edit); | |
3595 | defsubr (&Strack_mouse); | |
3596 | defsubr (&Smouse_click_p); | |
3597 | defsubr (&Sinput_pending_p); | |
3598 | defsubr (&Scommand_execute); | |
3599 | defsubr (&Srecent_keys); | |
3600 | defsubr (&Sthis_command_keys); | |
3601 | defsubr (&Ssuspend_emacs); | |
3602 | defsubr (&Sabort_recursive_edit); | |
3603 | defsubr (&Sexit_recursive_edit); | |
3604 | defsubr (&Srecursion_depth); | |
3605 | defsubr (&Stop_level); | |
3606 | defsubr (&Sdiscard_input); | |
3607 | defsubr (&Sopen_dribble_file); | |
3608 | defsubr (&Sset_input_mode); | |
3609 | defsubr (&Sexecute_extended_command); | |
3610 | ||
3611 | DEFVAR_LISP ("disabled-command-hook", &Vdisabled_command_hook, | |
3612 | "Value is called instead of any command that is disabled\n\ | |
7d6de002 | 3613 | \(has a non-nil `disabled' property)."); |
284f4730 JB |
3614 | |
3615 | DEFVAR_LISP ("last-command-char", &last_command_char, | |
3616 | "Last terminal input key that was part of a command."); | |
3617 | ||
7d6de002 RS |
3618 | DEFVAR_LISP ("last-nonmenu-event", &last_nonmenu_event, |
3619 | "Last terminal input key in a command, except for mouse menus.\n\ | |
3620 | Mouse menus give back keys that don't look like mouse events;\n\ | |
3621 | this variable holds the actual mouse event that led to the menu,\n\ | |
3622 | so that you can determine whether the command was run by mouse or not."); | |
3623 | ||
284f4730 JB |
3624 | DEFVAR_LISP ("last-input-char", &last_input_char, |
3625 | "Last terminal input key."); | |
3626 | ||
3627 | DEFVAR_LISP ("unread-command-char", &unread_command_char, | |
3628 | "Object to be read as next input from input stream, or nil if none."); | |
3629 | ||
3630 | DEFVAR_LISP ("meta-prefix-char", &meta_prefix_char, | |
3631 | "Meta-prefix character code. Meta-foo as command input\n\ | |
3632 | turns into this character followed by foo."); | |
3633 | XSET (meta_prefix_char, Lisp_Int, 033); | |
3634 | ||
3635 | DEFVAR_LISP ("last-command", &last_command, | |
3636 | "The last command executed. Normally a symbol with a function definition,\n\ | |
3637 | but can be whatever was found in the keymap, or whatever the variable\n\ | |
3638 | `this-command' was set to by that command."); | |
3639 | last_command = Qnil; | |
3640 | ||
3641 | DEFVAR_LISP ("this-command", &this_command, | |
3642 | "The command now being executed.\n\ | |
3643 | The command can set this variable; whatever is put here\n\ | |
3644 | will be in `last-command' during the following command."); | |
3645 | this_command = Qnil; | |
3646 | ||
3647 | DEFVAR_INT ("auto-save-interval", &auto_save_interval, | |
3648 | "*Number of keyboard input characters between auto-saves.\n\ | |
3649 | Zero means disable autosaving due to number of characters typed."); | |
3650 | auto_save_interval = 300; | |
3651 | ||
3652 | DEFVAR_LISP ("auto-save-timeout", &Vauto_save_timeout, | |
3653 | "*Number of seconds idle time before auto-save.\n\ | |
06ef7355 RS |
3654 | Zero or nil means disable auto-saving due to idleness.\n\ |
3655 | After auto-saving due to this many seconds of idle time,\n\ | |
84447c71 | 3656 | Emacs also does a garbage collection if that seems to be warranted."); |
284f4730 JB |
3657 | XFASTINT (Vauto_save_timeout) = 30; |
3658 | ||
3659 | DEFVAR_INT ("echo-keystrokes", &echo_keystrokes, | |
3660 | "*Nonzero means echo unfinished commands after this many seconds of pause."); | |
3661 | echo_keystrokes = 1; | |
3662 | ||
3663 | DEFVAR_INT ("polling-period", &polling_period, | |
3664 | "*Interval between polling for input during Lisp execution.\n\ | |
3665 | The reason for polling is to make C-g work to stop a running program.\n\ | |
3666 | Polling is needed only when using X windows and SIGIO does not work.\n\ | |
3667 | Polling is automatically disabled in all other cases."); | |
3668 | polling_period = 2; | |
3669 | ||
3670 | DEFVAR_INT ("num-input-keys", &num_input_keys, | |
3671 | "*Number of complete keys read from the keyboard so far."); | |
3672 | num_input_keys = 0; | |
3673 | ||
3e51c7b7 | 3674 | #ifdef MULTI_FRAME |
ff11dfa1 | 3675 | DEFVAR_LISP ("last-event-frame", &Vlast_event_frame, |
fce33686 JB |
3676 | "*The frame in which the most recently read event occurred.\n\ |
3677 | If the last event came from a keyboard macro, this is set to `macro'."); | |
ff11dfa1 | 3678 | Vlast_event_frame = Qnil; |
3e51c7b7 | 3679 | #endif |
284f4730 JB |
3680 | |
3681 | DEFVAR_LISP ("help-char", &help_char, | |
3682 | "Character to recognize as meaning Help.\n\ | |
3683 | When it is read, do `(eval help-form)', and display result if it's a string.\n\ | |
3684 | If the value of `help-form' is nil, this char can be read normally."); | |
3685 | XSET (help_char, Lisp_Int, Ctl ('H')); | |
3686 | ||
3687 | DEFVAR_LISP ("help-form", &Vhelp_form, | |
3688 | "Form to execute when character help-char is read.\n\ | |
3689 | If the form returns a string, that string is displayed.\n\ | |
3690 | If `help-form' is nil, the help char is not recognized."); | |
3691 | Vhelp_form = Qnil; | |
3692 | ||
3693 | DEFVAR_LISP ("top-level", &Vtop_level, | |
3694 | "Form to evaluate when Emacs starts up.\n\ | |
3695 | Useful to set before you dump a modified Emacs."); | |
3696 | Vtop_level = Qnil; | |
3697 | ||
3698 | DEFVAR_LISP ("keyboard-translate-table", &Vkeyboard_translate_table, | |
3699 | "String used as translate table for keyboard input, or nil.\n\ | |
3700 | Each character is looked up in this string and the contents used instead.\n\ | |
3701 | If string is of length N, character codes N and up are untranslated."); | |
3702 | Vkeyboard_translate_table = Qnil; | |
3703 | ||
284f4730 | 3704 | DEFVAR_BOOL ("menu-prompting", &menu_prompting, |
7d6de002 | 3705 | "Non-nil means prompt with menus when appropriate.\n\ |
284f4730 | 3706 | This is done when reading from a keymap that has a prompt string,\n\ |
7d6de002 RS |
3707 | for elements that have prompt strings.\n\ |
3708 | The menu is displayed on the screen\n\ | |
3709 | if X menus were enabled at configuration\n\ | |
3710 | time and the previous event was a mouse click prefix key.\n\ | |
3711 | Otherwise, menu prompting uses the echo area."); | |
284f4730 JB |
3712 | menu_prompting = 1; |
3713 | ||
3714 | DEFVAR_LISP ("menu-prompt-more-char", &menu_prompt_more_char, | |
3715 | "Character to see next line of menu prompt.\n\ | |
3716 | Type this character while in a menu prompt to rotate around the lines of it."); | |
3717 | XSET (menu_prompt_more_char, Lisp_Int, ' '); | |
3718 | } | |
3719 | ||
3720 | keys_of_keyboard () | |
3721 | { | |
3722 | initial_define_key (global_map, Ctl ('Z'), "suspend-emacs"); | |
3723 | initial_define_key (control_x_map, Ctl ('Z'), "suspend-emacs"); | |
3724 | initial_define_key (meta_map, Ctl ('C'), "exit-recursive-edit"); | |
3725 | initial_define_key (global_map, Ctl (']'), "abort-recursive-edit"); | |
3726 | initial_define_key (meta_map, 'x', "execute-extended-command"); | |
3727 | } |