Commit | Line | Data |
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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 */ | |
5160df46 | 79 | Lisp_Object recent_keys; /* A vector, holding the last 100 keystrokes */ |
284f4730 | 80 | |
6569cc8d JB |
81 | /* Vector holding the key sequence that invoked the current command. |
82 | It is reused for each command, and it may be longer than the current | |
83 | sequence; this_command_key_count indicates how many elements | |
84 | actually mean something. | |
85 | It's easier to staticpro a single Lisp_Object than an array. */ | |
86 | Lisp_Object this_command_keys; | |
87 | int this_command_key_count; | |
284f4730 JB |
88 | |
89 | extern int minbuf_level; | |
90 | ||
91 | extern struct backtrace *backtrace_list; | |
92 | ||
93 | /* Nonzero means do menu prompting. */ | |
94 | static int menu_prompting; | |
95 | ||
96 | /* Character to see next line of menu prompt. */ | |
97 | static Lisp_Object menu_prompt_more_char; | |
98 | ||
99 | /* For longjmp to where kbd input is being done. */ | |
100 | static jmp_buf getcjmp; | |
101 | ||
102 | /* True while doing kbd input. */ | |
103 | int waiting_for_input; | |
104 | ||
105 | /* True while displaying for echoing. Delays C-g throwing. */ | |
106 | static int echoing; | |
107 | ||
108 | /* Nonzero means C-G should cause immediate error-signal. */ | |
109 | int immediate_quit; | |
110 | ||
111 | /* Character to recognize as the help char. */ | |
112 | Lisp_Object help_char; | |
113 | ||
114 | /* Form to execute when help char is typed. */ | |
115 | Lisp_Object Vhelp_form; | |
116 | ||
117 | /* Character that causes a quit. Normally C-g. | |
118 | ||
119 | If we are running on an ordinary terminal, this must be an ordinary | |
120 | ASCII char, since we want to make it our interrupt character. | |
121 | ||
122 | If we are not running on an ordinary terminal, it still needs to be | |
123 | an ordinary ASCII char. This character needs to be recognized in | |
124 | the input interrupt handler. At this point, the keystroke is | |
125 | represented as a struct input_event, while the desired quit | |
126 | character is specified as a lispy event. The mapping from struct | |
127 | input_events to lispy events cannot run in an interrupt handler, | |
128 | and the reverse mapping is difficult for anything but ASCII | |
129 | keystrokes. | |
130 | ||
131 | FOR THESE ELABORATE AND UNSATISFYING REASONS, quit_char must be an | |
132 | ASCII character. */ | |
133 | int quit_char; | |
134 | ||
135 | extern Lisp_Object current_global_map; | |
136 | extern int minibuf_level; | |
137 | ||
138 | /* Current depth in recursive edits. */ | |
139 | int command_loop_level; | |
140 | ||
141 | /* Total number of times command_loop has read a key sequence. */ | |
142 | int num_input_keys; | |
143 | ||
144 | /* Last input character read as a command. */ | |
145 | Lisp_Object last_command_char; | |
146 | ||
7d6de002 RS |
147 | /* Last input character read as a command, not counting menus |
148 | reached by the mouse. */ | |
149 | Lisp_Object last_nonmenu_event; | |
150 | ||
284f4730 JB |
151 | /* Last input character read for any purpose. */ |
152 | Lisp_Object last_input_char; | |
153 | ||
154 | /* If not Qnil, an object to be read as the next command input. */ | |
155 | Lisp_Object unread_command_char; | |
156 | ||
cd21b839 JB |
157 | /* If not Qnil, this is a switch-frame event which we decided to put |
158 | off until the end of a key sequence. This should be read as the | |
159 | next command input, after any unread_command_char. */ | |
160 | Lisp_Object unread_switch_frame; | |
161 | ||
284f4730 JB |
162 | /* Char to use as prefix when a meta character is typed in. |
163 | This is bound on entry to minibuffer in case ESC is changed there. */ | |
164 | ||
165 | Lisp_Object meta_prefix_char; | |
166 | ||
167 | /* Last size recorded for a current buffer which is not a minibuffer. */ | |
168 | static int last_non_minibuf_size; | |
169 | ||
06ef7355 | 170 | /* Number of idle seconds before an auto-save and garbage collection. */ |
284f4730 JB |
171 | static Lisp_Object Vauto_save_timeout; |
172 | ||
173 | /* Total number of times read_char has returned. */ | |
174 | int num_input_chars; | |
175 | ||
51172b6d RS |
176 | /* Total number of times read_char has returned, outside of macros. */ |
177 | int num_nonmacro_input_chars; | |
178 | ||
284f4730 JB |
179 | /* Auto-save automatically when this many characters have been typed |
180 | since the last time. */ | |
181 | ||
182 | static int auto_save_interval; | |
183 | ||
51172b6d | 184 | /* Value of num_nonmacro_input_chars as of last auto save. */ |
284f4730 JB |
185 | |
186 | int last_auto_save; | |
187 | ||
188 | /* Last command executed by the editor command loop, not counting | |
189 | commands that set the prefix argument. */ | |
190 | ||
191 | Lisp_Object last_command; | |
192 | ||
193 | /* The command being executed by the command loop. | |
194 | Commands may set this, and the value set will be copied into last_command | |
195 | instead of the actual command. */ | |
196 | Lisp_Object this_command; | |
197 | ||
fce33686 JB |
198 | /* The frame in which the last input event occurred, or Qmacro if the |
199 | last event came from a macro. | |
ff11dfa1 | 200 | command_loop_1 will select this frame before running the |
284f4730 JB |
201 | command bound to an event sequence, and read_key_sequence will |
202 | toss the existing prefix if the user starts typing at a | |
cd21b839 JB |
203 | new frame. |
204 | ||
205 | On a non-multi-frame Emacs, this will be either Qmacro or | |
206 | selected_frame. */ | |
ff11dfa1 | 207 | Lisp_Object Vlast_event_frame; |
284f4730 | 208 | |
1113d9db JB |
209 | /* The timestamp of the last input event we received from the X server. |
210 | X Windows wants this for selection ownership. */ | |
284f4730 JB |
211 | unsigned long last_event_timestamp; |
212 | ||
213 | Lisp_Object Qself_insert_command; | |
214 | Lisp_Object Qforward_char; | |
215 | Lisp_Object Qbackward_char; | |
216 | ||
217 | /* read_key_sequence stores here the command definition of the | |
218 | key sequence that it reads. */ | |
219 | Lisp_Object read_key_sequence_cmd; | |
220 | ||
221 | /* Form to evaluate (if non-nil) when Emacs is started. */ | |
222 | Lisp_Object Vtop_level; | |
223 | ||
224 | /* User-supplied string to translate input characters through. */ | |
225 | Lisp_Object Vkeyboard_translate_table; | |
226 | ||
227 | /* Keymap mapping ASCII function key sequences onto their preferred forms. */ | |
228 | extern Lisp_Object Vfunction_key_map; | |
229 | ||
230 | /* File in which we write all commands we read. */ | |
231 | FILE *dribble; | |
232 | ||
233 | /* Nonzero if input is available. */ | |
234 | int input_pending; | |
235 | ||
236 | /* Nonzero if should obey 0200 bit in input chars as "Meta". */ | |
237 | int meta_key; | |
238 | ||
239 | extern char *pending_malloc_warning; | |
240 | ||
241 | /* Circular buffer for pre-read keyboard input. */ | |
242 | static struct input_event kbd_buffer[KBD_BUFFER_SIZE]; | |
243 | ||
244 | /* Pointer to next available character in kbd_buffer. | |
245 | If kbd_fetch_ptr == kbd_store_ptr, the buffer is empty. | |
246 | This may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the the | |
247 | next available char is in kbd_buffer[0]. */ | |
248 | static struct input_event *kbd_fetch_ptr; | |
249 | ||
250 | /* Pointer to next place to store character in kbd_buffer. This | |
251 | may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the next | |
252 | character should go in kbd_buffer[0]. */ | |
253 | static struct input_event *kbd_store_ptr; | |
254 | ||
255 | /* The above pair of variables forms a "queue empty" flag. When we | |
256 | enqueue a non-hook event, we increment kbd_write_count. When we | |
257 | dequeue a non-hook event, we increment kbd_read_count. We say that | |
258 | there is input available iff the two counters are equal. | |
259 | ||
260 | Why not just have a flag set and cleared by the enqueuing and | |
261 | dequeuing functions? Such a flag could be screwed up by interrupts | |
262 | at inopportune times. */ | |
263 | ||
264 | /* If this flag is non-zero, mouse movement events will appear in the | |
265 | input stream. If is zero, mouse movement will be ignored. */ | |
266 | int do_mouse_tracking; | |
267 | ||
268 | /* The window system handling code should set this if the mouse has | |
269 | moved since the last call to the mouse_position_hook. Calling that | |
270 | hook should clear this. Code assumes that if this is set, it can | |
271 | call mouse_position_hook to get the promised position, so don't set | |
272 | it unless you're prepared to substantiate the claim! */ | |
273 | int mouse_moved; | |
274 | ||
275 | /* True iff there is an event in kbd_buffer, or if mouse tracking is | |
276 | enabled and there is a new mouse position in the mouse movement | |
277 | buffer. Note that if this is false, that doesn't mean that there | |
278 | is readable input; all the events in the queue might be button-up | |
279 | events, and do_mouse_tracking might be off. */ | |
280 | #define EVENT_QUEUES_EMPTY \ | |
281 | ((kbd_fetch_ptr == kbd_store_ptr) && (!do_mouse_tracking || !mouse_moved)) | |
282 | ||
283 | ||
284 | /* Symbols to head events. */ | |
285 | Lisp_Object Qmouse_movement; | |
286 | ||
287 | Lisp_Object Qvscrollbar_part; | |
288 | Lisp_Object Qvslider_part; | |
289 | Lisp_Object Qvthumbup_part; | |
290 | Lisp_Object Qvthumbdown_part; | |
291 | ||
292 | Lisp_Object Qhscrollbar_part; | |
293 | Lisp_Object Qhslider_part; | |
294 | Lisp_Object Qhthumbleft_part; | |
295 | Lisp_Object Qhthumbright_part; | |
296 | ||
cd21b839 JB |
297 | Lisp_Object Qswitch_frame; |
298 | ||
284f4730 JB |
299 | /* Symbols to denote kinds of events. */ |
300 | Lisp_Object Qfunction_key; | |
301 | Lisp_Object Qmouse_click; | |
302 | /* Lisp_Object Qmouse_movement; - also an event header */ | |
303 | Lisp_Object Qscrollbar_click; | |
304 | ||
305 | /* Properties of event headers. */ | |
306 | Lisp_Object Qevent_kind; | |
88cb0656 | 307 | Lisp_Object Qevent_symbol_elements; |
284f4730 | 308 | |
0a7f1fc0 JB |
309 | /* An event header symbol HEAD may have a property named |
310 | Qevent_symbol_element_mask, which is of the form (BASE MODIFIERS); | |
311 | BASE is the base, unmodified version of HEAD, and MODIFIERS is the | |
312 | mask of modifiers applied to it. If present, this is used to help | |
313 | speed up parse_modifiers. */ | |
314 | Lisp_Object Qevent_symbol_element_mask; | |
315 | ||
316 | /* An unmodified event header BASE may have a property named | |
317 | Qmodifier_cache, which is an alist mapping modifier masks onto | |
318 | modified versions of BASE. If present, this helps speed up | |
319 | apply_modifiers. */ | |
320 | Lisp_Object Qmodifier_cache; | |
321 | ||
284f4730 JB |
322 | /* Symbols to use for non-text mouse positions. */ |
323 | Lisp_Object Qmode_line; | |
e5d77022 | 324 | Lisp_Object Qvertical_line; |
284f4730 JB |
325 | |
326 | ||
ffd56f97 JB |
327 | /* Address (if not 0) of EMACS_TIME to zero out if a SIGIO interrupt |
328 | happens. */ | |
329 | EMACS_TIME *input_available_clear_time; | |
284f4730 JB |
330 | |
331 | /* Nonzero means use SIGIO interrupts; zero means use CBREAK mode. | |
332 | Default is 1 if INTERRUPT_INPUT is defined. */ | |
333 | int interrupt_input; | |
334 | ||
335 | /* Nonzero while interrupts are temporarily deferred during redisplay. */ | |
336 | int interrupts_deferred; | |
337 | ||
338 | /* nonzero means use ^S/^Q for flow control. */ | |
339 | int flow_control; | |
340 | ||
284f4730 JB |
341 | /* Allow m- file to inhibit use of FIONREAD. */ |
342 | #ifdef BROKEN_FIONREAD | |
343 | #undef FIONREAD | |
344 | #endif | |
345 | ||
346 | /* We are unable to use interrupts if FIONREAD is not available, | |
347 | so flush SIGIO so we won't try. */ | |
348 | #ifndef FIONREAD | |
349 | #ifdef SIGIO | |
350 | #undef SIGIO | |
351 | #endif | |
352 | #endif | |
353 | ||
354 | /* If we support X Windows, and won't get an interrupt when input | |
355 | arrives from the server, poll periodically so we can detect C-g. */ | |
356 | #ifdef HAVE_X_WINDOWS | |
357 | #ifndef SIGIO | |
358 | #define POLL_FOR_INPUT | |
359 | #endif | |
360 | #endif | |
361 | \f | |
362 | /* Global variable declarations. */ | |
363 | ||
364 | /* Function for init_keyboard to call with no args (if nonzero). */ | |
365 | void (*keyboard_init_hook) (); | |
366 | ||
367 | static int read_avail_input (); | |
368 | static void get_input_pending (); | |
369 | ||
370 | /* > 0 if we are to echo keystrokes. */ | |
371 | static int echo_keystrokes; | |
372 | ||
373 | /* Nonzero means echo each character as typed. */ | |
374 | static int immediate_echo; | |
375 | ||
376 | /* The text we're echoing in the modeline - partial key sequences, | |
377 | usually. '\0'-terminated. */ | |
378 | static char echobuf[100]; | |
379 | ||
380 | /* Where to append more text to echobuf if we want to. */ | |
381 | static char *echoptr; | |
382 | ||
383 | #define min(a,b) ((a)<(b)?(a):(b)) | |
384 | #define max(a,b) ((a)>(b)?(a):(b)) | |
385 | ||
386 | /* Install the string STR as the beginning of the string of echoing, | |
387 | so that it serves as a prompt for the next character. | |
388 | Also start echoing. */ | |
389 | ||
390 | echo_prompt (str) | |
391 | char *str; | |
392 | { | |
393 | int len = strlen (str); | |
394 | if (len > sizeof echobuf - 4) | |
395 | len = sizeof echobuf - 4; | |
0a7f1fc0 | 396 | bcopy (str, echobuf, len); |
284f4730 | 397 | echoptr = echobuf + len; |
0a7f1fc0 | 398 | *echoptr = '\0'; |
284f4730 JB |
399 | |
400 | echo (); | |
401 | } | |
402 | ||
403 | /* Add C to the echo string, if echoing is going on. | |
404 | C can be a character, which is printed prettily ("M-C-x" and all that | |
405 | jazz), or a symbol, whose name is printed. */ | |
406 | ||
407 | echo_char (c) | |
408 | Lisp_Object c; | |
409 | { | |
410 | extern char *push_key_description (); | |
411 | ||
412 | if (immediate_echo) | |
413 | { | |
414 | char *ptr = echoptr; | |
415 | ||
416 | if (ptr != echobuf) | |
417 | *ptr++ = ' '; | |
418 | ||
419 | /* If someone has passed us a composite event, use its head symbol. */ | |
88cb0656 | 420 | c = EVENT_HEAD (c); |
284f4730 JB |
421 | |
422 | if (XTYPE (c) == Lisp_Int) | |
423 | { | |
424 | if (ptr - echobuf > sizeof echobuf - 6) | |
425 | return; | |
426 | ||
427 | ptr = push_key_description (c, ptr); | |
428 | } | |
429 | else if (XTYPE (c) == Lisp_Symbol) | |
430 | { | |
431 | struct Lisp_String *name = XSYMBOL (c)->name; | |
432 | if (((ptr - echobuf) + name->size + 4) > sizeof echobuf) | |
433 | return; | |
434 | bcopy (name->data, ptr, name->size); | |
435 | ptr += name->size; | |
436 | } | |
437 | ||
438 | if (echoptr == echobuf && c == help_char) | |
439 | { | |
440 | strcpy (ptr, " (Type ? for further options)"); | |
441 | ptr += strlen (ptr); | |
442 | } | |
443 | ||
444 | *ptr = 0; | |
445 | echoptr = ptr; | |
446 | ||
447 | echo (); | |
448 | } | |
449 | } | |
450 | ||
451 | /* Temporarily add a dash to the end of the echo string if it's not | |
452 | empty, so that it serves as a mini-prompt for the very next character. */ | |
453 | ||
454 | echo_dash () | |
455 | { | |
456 | if (!immediate_echo && echoptr == echobuf) | |
457 | return; | |
458 | ||
459 | /* Put a dash at the end of the buffer temporarily, | |
460 | but make it go away when the next character is added. */ | |
461 | echoptr[0] = '-'; | |
462 | echoptr[1] = 0; | |
463 | ||
464 | echo (); | |
465 | } | |
466 | ||
467 | /* Display the current echo string, and begin echoing if not already | |
468 | doing so. */ | |
469 | ||
470 | echo () | |
471 | { | |
472 | if (!immediate_echo) | |
473 | { | |
474 | int i; | |
475 | immediate_echo = 1; | |
476 | ||
477 | for (i = 0; i < this_command_key_count; i++) | |
6569cc8d | 478 | echo_char (XVECTOR (this_command_keys)->contents[i]); |
284f4730 JB |
479 | echo_dash (); |
480 | } | |
481 | ||
482 | echoing = 1; | |
483 | message1 (echobuf); | |
484 | echoing = 0; | |
485 | ||
486 | if (waiting_for_input && !NILP (Vquit_flag)) | |
487 | quit_throw_to_read_char (); | |
488 | } | |
489 | ||
490 | /* Turn off echoing, for the start of a new command. */ | |
491 | ||
492 | cancel_echoing () | |
493 | { | |
494 | immediate_echo = 0; | |
495 | echoptr = echobuf; | |
496 | } | |
497 | ||
498 | /* Return the length of the current echo string. */ | |
499 | ||
500 | static int | |
501 | echo_length () | |
502 | { | |
503 | return echoptr - echobuf; | |
504 | } | |
505 | ||
506 | /* Truncate the current echo message to its first LEN chars. | |
507 | This and echo_char get used by read_key_sequence when the user | |
ff11dfa1 | 508 | switches frames while entering a key sequence. */ |
284f4730 JB |
509 | |
510 | static void | |
511 | echo_truncate (len) | |
512 | int len; | |
513 | { | |
514 | echobuf[len] = '\0'; | |
0a7f1fc0 | 515 | echoptr = echobuf + len; |
284f4730 JB |
516 | } |
517 | ||
518 | \f | |
519 | /* Functions for manipulating this_command_keys. */ | |
520 | static void | |
521 | add_command_key (key) | |
522 | Lisp_Object key; | |
523 | { | |
6569cc8d JB |
524 | int size = XVECTOR (this_command_keys)->size; |
525 | ||
526 | if (this_command_key_count >= size) | |
284f4730 | 527 | { |
6569cc8d JB |
528 | Lisp_Object new_keys = Fmake_vector (make_number (size * 2), Qnil); |
529 | ||
530 | bcopy (XVECTOR (this_command_keys)->contents, | |
531 | XVECTOR (new_keys)->contents, | |
532 | size); | |
533 | ||
534 | this_command_keys = new_keys; | |
284f4730 | 535 | } |
6569cc8d JB |
536 | |
537 | XVECTOR (this_command_keys)->contents[this_command_key_count++] = key; | |
284f4730 JB |
538 | } |
539 | \f | |
540 | Lisp_Object | |
541 | recursive_edit_1 () | |
542 | { | |
543 | int count = specpdl_ptr - specpdl; | |
544 | Lisp_Object val; | |
545 | ||
546 | if (command_loop_level > 0) | |
547 | { | |
548 | specbind (Qstandard_output, Qt); | |
549 | specbind (Qstandard_input, Qt); | |
550 | } | |
551 | ||
552 | val = command_loop (); | |
553 | if (EQ (val, Qt)) | |
554 | Fsignal (Qquit, Qnil); | |
555 | ||
556 | unbind_to (count); | |
557 | return Qnil; | |
558 | } | |
559 | ||
560 | /* When an auto-save happens, record the "time", and don't do again soon. */ | |
561 | record_auto_save () | |
562 | { | |
51172b6d | 563 | last_auto_save = num_nonmacro_input_chars; |
284f4730 JB |
564 | } |
565 | \f | |
566 | Lisp_Object recursive_edit_unwind (), command_loop (); | |
567 | ||
568 | DEFUN ("recursive-edit", Frecursive_edit, Srecursive_edit, 0, 0, "", | |
569 | "Invoke the editor command loop recursively.\n\ | |
570 | To get out of the recursive edit, a command can do `(throw 'exit nil)';\n\ | |
571 | that tells this function to return.\n\ | |
572 | Alternately, `(throw 'exit t)' makes this function signal an error.\n\ | |
573 | This function is called by the editor initialization to begin editing.") | |
574 | () | |
575 | { | |
576 | int count = specpdl_ptr - specpdl; | |
577 | Lisp_Object val; | |
578 | ||
579 | command_loop_level++; | |
580 | update_mode_lines = 1; | |
581 | ||
582 | record_unwind_protect (recursive_edit_unwind, | |
583 | (command_loop_level | |
584 | && current_buffer != XBUFFER (XWINDOW (selected_window)->buffer)) | |
585 | ? Fcurrent_buffer () | |
586 | : Qnil); | |
587 | recursive_edit_1 (); | |
588 | return unbind_to (count, Qnil); | |
589 | } | |
590 | ||
591 | Lisp_Object | |
592 | recursive_edit_unwind (buffer) | |
593 | Lisp_Object buffer; | |
594 | { | |
595 | if (!NILP (buffer)) | |
596 | Fset_buffer (buffer); | |
597 | ||
598 | command_loop_level--; | |
599 | update_mode_lines = 1; | |
600 | return Qnil; | |
601 | } | |
602 | \f | |
603 | Lisp_Object | |
604 | cmd_error (data) | |
605 | Lisp_Object data; | |
606 | { | |
607 | Lisp_Object errmsg, tail, errname, file_error; | |
608 | Lisp_Object stream; | |
609 | struct gcpro gcpro1; | |
610 | int i; | |
611 | ||
612 | Vquit_flag = Qnil; | |
613 | Vinhibit_quit = Qt; | |
614 | Vstandard_output = Qt; | |
615 | Vstandard_input = Qt; | |
616 | Vexecuting_macro = Qnil; | |
617 | echo_area_glyphs = 0; | |
618 | ||
ff11dfa1 | 619 | /* If the window system or terminal frame hasn't been initialized |
284f4730 JB |
620 | yet, or we're not interactive, it's best to dump this message out |
621 | to stderr and exit. */ | |
ff11dfa1 | 622 | if (! FRAME_MESSAGE_BUF (selected_frame) |
284f4730 JB |
623 | || noninteractive) |
624 | stream = Qexternal_debugging_output; | |
625 | else | |
626 | { | |
627 | Fdiscard_input (); | |
628 | bitch_at_user (); | |
629 | stream = Qt; | |
630 | } | |
631 | ||
632 | errname = Fcar (data); | |
633 | ||
634 | if (EQ (errname, Qerror)) | |
635 | { | |
636 | data = Fcdr (data); | |
637 | if (!CONSP (data)) data = Qnil; | |
638 | errmsg = Fcar (data); | |
639 | file_error = Qnil; | |
640 | } | |
641 | else | |
642 | { | |
643 | errmsg = Fget (errname, Qerror_message); | |
644 | file_error = Fmemq (Qfile_error, | |
645 | Fget (errname, Qerror_conditions)); | |
646 | } | |
647 | ||
648 | /* Print an error message including the data items. | |
649 | This is done by printing it into a scratch buffer | |
650 | and then making a copy of the text in the buffer. */ | |
651 | ||
652 | if (!CONSP (data)) data = Qnil; | |
653 | tail = Fcdr (data); | |
654 | GCPRO1 (tail); | |
655 | ||
656 | /* For file-error, make error message by concatenating | |
657 | all the data items. They are all strings. */ | |
658 | if (!NILP (file_error) && !NILP (tail)) | |
659 | errmsg = XCONS (tail)->car, tail = XCONS (tail)->cdr; | |
660 | ||
661 | if (XTYPE (errmsg) == Lisp_String) | |
662 | Fprinc (errmsg, stream); | |
663 | else | |
664 | write_string_1 ("peculiar error", -1, stream); | |
665 | ||
666 | for (i = 0; CONSP (tail); tail = Fcdr (tail), i++) | |
667 | { | |
668 | write_string_1 (i ? ", " : ": ", 2, stream); | |
669 | if (!NILP (file_error)) | |
670 | Fprinc (Fcar (tail), stream); | |
671 | else | |
672 | Fprin1 (Fcar (tail), stream); | |
673 | } | |
674 | UNGCPRO; | |
675 | ||
ff11dfa1 | 676 | /* If the window system or terminal frame hasn't been initialized |
284f4730 | 677 | yet, or we're in -batch mode, this error should cause Emacs to exit. */ |
ff11dfa1 | 678 | if (! FRAME_MESSAGE_BUF (selected_frame) |
284f4730 JB |
679 | || noninteractive) |
680 | { | |
681 | Fterpri (stream); | |
682 | Fkill_emacs (make_number (-1)); | |
683 | } | |
684 | ||
685 | Vquit_flag = Qnil; | |
686 | ||
687 | Vinhibit_quit = Qnil; | |
688 | return make_number (0); | |
689 | } | |
690 | \f | |
691 | Lisp_Object command_loop_1 (); | |
692 | Lisp_Object command_loop_2 (); | |
693 | Lisp_Object top_level_1 (); | |
694 | ||
695 | /* Entry to editor-command-loop. | |
696 | This level has the catches for exiting/returning to editor command loop. | |
697 | It returns nil to exit recursive edit, t to abort it. */ | |
698 | ||
699 | Lisp_Object | |
700 | command_loop () | |
701 | { | |
702 | if (command_loop_level > 0 || minibuf_level > 0) | |
703 | { | |
704 | return internal_catch (Qexit, command_loop_2, Qnil); | |
705 | } | |
706 | else | |
707 | while (1) | |
708 | { | |
709 | internal_catch (Qtop_level, top_level_1, Qnil); | |
710 | internal_catch (Qtop_level, command_loop_2, Qnil); | |
711 | ||
712 | /* End of file in -batch run causes exit here. */ | |
713 | if (noninteractive) | |
714 | Fkill_emacs (Qt); | |
715 | } | |
716 | } | |
717 | ||
718 | /* Here we catch errors in execution of commands within the | |
719 | editing loop, and reenter the editing loop. | |
720 | When there is an error, cmd_error runs and returns a non-nil | |
721 | value to us. A value of nil means that cmd_loop_1 itself | |
722 | returned due to end of file (or end of kbd macro). */ | |
723 | ||
724 | Lisp_Object | |
725 | command_loop_2 () | |
726 | { | |
727 | register Lisp_Object val; | |
728 | ||
729 | do | |
730 | val = internal_condition_case (command_loop_1, Qerror, cmd_error); | |
731 | while (!NILP (val)); | |
732 | ||
733 | return Qnil; | |
734 | } | |
735 | ||
736 | Lisp_Object | |
737 | top_level_2 () | |
738 | { | |
739 | return Feval (Vtop_level); | |
740 | } | |
741 | ||
742 | Lisp_Object | |
743 | top_level_1 () | |
744 | { | |
745 | /* On entry to the outer level, run the startup file */ | |
746 | if (!NILP (Vtop_level)) | |
747 | internal_condition_case (top_level_2, Qerror, cmd_error); | |
748 | else if (!NILP (Vpurify_flag)) | |
749 | message ("Bare impure Emacs (standard Lisp code not loaded)"); | |
750 | else | |
751 | message ("Bare Emacs (standard Lisp code not loaded)"); | |
752 | return Qnil; | |
753 | } | |
754 | ||
755 | DEFUN ("top-level", Ftop_level, Stop_level, 0, 0, "", | |
756 | "Exit all recursive editing levels.") | |
757 | () | |
758 | { | |
759 | Fthrow (Qtop_level, Qnil); | |
760 | } | |
761 | ||
762 | DEFUN ("exit-recursive-edit", Fexit_recursive_edit, Sexit_recursive_edit, 0, 0, "", | |
763 | "Exit from the innermost recursive edit or minibuffer.") | |
764 | () | |
765 | { | |
766 | if (command_loop_level > 0 || minibuf_level > 0) | |
767 | Fthrow (Qexit, Qnil); | |
768 | ||
769 | error ("No recursive edit is in progress"); | |
770 | } | |
771 | ||
772 | DEFUN ("abort-recursive-edit", Fabort_recursive_edit, Sabort_recursive_edit, 0, 0, "", | |
773 | "Abort the command that requested this recursive edit or minibuffer input.") | |
774 | () | |
775 | { | |
776 | if (command_loop_level > 0 || minibuf_level > 0) | |
777 | Fthrow (Qexit, Qt); | |
778 | ||
779 | error ("No recursive edit is in progress"); | |
780 | } | |
781 | \f | |
782 | /* This is the actual command reading loop, | |
783 | sans error-handling encapsulation. */ | |
784 | ||
785 | Lisp_Object Fcommand_execute (); | |
786 | static int read_key_sequence (); | |
787 | ||
788 | Lisp_Object | |
789 | command_loop_1 () | |
790 | { | |
791 | Lisp_Object cmd; | |
792 | int lose; | |
793 | int nonundocount; | |
794 | Lisp_Object keybuf[30]; | |
795 | int i; | |
796 | int no_redisplay; | |
797 | int no_direct; | |
798 | ||
799 | Vprefix_arg = Qnil; | |
800 | waiting_for_input = 0; | |
801 | cancel_echoing (); | |
802 | ||
803 | /* Don't clear out last_command at the beginning of a macro. */ | |
804 | if (XTYPE (Vexecuting_macro) != Lisp_String) | |
805 | last_command = Qt; | |
806 | ||
807 | nonundocount = 0; | |
808 | no_redisplay = 0; | |
809 | this_command_key_count = 0; | |
810 | ||
811 | while (1) | |
812 | { | |
813 | /* Install chars successfully executed in kbd macro. */ | |
814 | ||
815 | if (defining_kbd_macro && NILP (Vprefix_arg)) | |
816 | finalize_kbd_macro_chars (); | |
817 | ||
818 | /* Make sure the current window's buffer is selected. */ | |
819 | if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) | |
820 | set_buffer_internal (XBUFFER (XWINDOW (selected_window)->buffer)); | |
821 | ||
822 | /* Display any malloc warning that just came out. Use while because | |
823 | displaying one warning can cause another. */ | |
824 | ||
825 | while (pending_malloc_warning) | |
826 | display_malloc_warning (); | |
827 | ||
828 | no_direct = 0; | |
829 | ||
830 | /* If minibuffer on and echo area in use, | |
831 | wait 2 sec and redraw minibufer. */ | |
832 | ||
833 | if (minibuf_level && echo_area_glyphs) | |
834 | { | |
f1bed6d8 RS |
835 | /* Bind inhibit-quit to t so that C-g gets read in |
836 | rather than quitting back to the minibuffer. */ | |
837 | int count = specpdl_ptr - specpdl; | |
838 | specbind (Qinhibit_quit, Qt); | |
284f4730 | 839 | Fsit_for (make_number (2), Qnil, Qnil); |
f1bed6d8 RS |
840 | unbind_to (count); |
841 | ||
284f4730 JB |
842 | echo_area_glyphs = 0; |
843 | no_direct = 1; | |
844 | if (!NILP (Vquit_flag)) | |
845 | { | |
846 | Vquit_flag = Qnil; | |
847 | unread_command_char = make_number (quit_char); | |
848 | } | |
849 | } | |
850 | ||
851 | #ifdef C_ALLOCA | |
852 | alloca (0); /* Cause a garbage collection now */ | |
853 | /* Since we can free the most stuff here. */ | |
854 | #endif /* C_ALLOCA */ | |
855 | ||
856 | /* Read next key sequence; i gets its length. */ | |
857 | i = read_key_sequence (keybuf, (sizeof keybuf / sizeof (keybuf[0])), 0); | |
858 | ||
859 | ++num_input_keys; | |
860 | ||
cd21b839 | 861 | #if 0 /* This shouldn't be necessary, now that we have switch-frame events. */ |
ff11dfa1 JB |
862 | #ifdef MULTI_FRAME |
863 | /* Select the frame that the key sequence came from. */ | |
864 | if (XTYPE (Vlast_event_frame) == Lisp_Frame | |
865 | && XFRAME (Vlast_event_frame) != selected_frame) | |
866 | Fselect_frame (Vlast_event_frame, Qnil); | |
cd21b839 | 867 | #endif |
284f4730 JB |
868 | #endif |
869 | ||
870 | /* Now we have read a key sequence of length I, | |
871 | or else I is 0 and we found end of file. */ | |
872 | ||
873 | if (i == 0) /* End of file -- happens only in */ | |
874 | return Qnil; /* a kbd macro, at the end. */ | |
875 | ||
284f4730 JB |
876 | last_command_char = keybuf[i - 1]; |
877 | ||
878 | cmd = read_key_sequence_cmd; | |
879 | if (!NILP (Vexecuting_macro)) | |
880 | { | |
881 | if (!NILP (Vquit_flag)) | |
882 | { | |
883 | Vexecuting_macro = Qt; | |
884 | QUIT; /* Make some noise. */ | |
885 | /* Will return since macro now empty. */ | |
886 | } | |
887 | } | |
888 | ||
889 | /* Do redisplay processing after this command except in special | |
890 | cases identified below that set no_redisplay to 1. */ | |
891 | no_redisplay = 0; | |
892 | ||
893 | /* Execute the command. */ | |
894 | ||
895 | if (NILP (cmd)) | |
896 | { | |
897 | /* nil means key is undefined. */ | |
898 | bitch_at_user (); | |
899 | defining_kbd_macro = 0; | |
900 | update_mode_lines = 1; | |
901 | Vprefix_arg = Qnil; | |
902 | } | |
903 | else | |
904 | { | |
905 | this_command = cmd; | |
906 | if (NILP (Vprefix_arg) && ! no_direct) | |
907 | { | |
908 | /* Recognize some common commands in common situations and | |
909 | do them directly. */ | |
910 | if (EQ (cmd, Qforward_char) && point < ZV) | |
911 | { | |
912 | struct Lisp_Vector *dp | |
913 | = window_display_table (XWINDOW (selected_window)); | |
914 | lose = FETCH_CHAR (point); | |
915 | SET_PT (point + 1); | |
916 | if (((dp == 0 && lose >= 040 && lose < 0177) | |
917 | || | |
918 | (dp && (XTYPE (dp->contents[lose]) != Lisp_String | |
919 | || XSTRING (dp->contents[lose])->size == sizeof (GLYPH)))) | |
284f4730 JB |
920 | && (XFASTINT (XWINDOW (selected_window)->last_modified) |
921 | >= MODIFF) | |
922 | && (XFASTINT (XWINDOW (selected_window)->last_point) | |
923 | == point - 1) | |
924 | && !windows_or_buffers_changed | |
925 | && EQ (current_buffer->selective_display, Qnil) | |
926 | && !detect_input_pending () | |
927 | && NILP (Vexecuting_macro)) | |
928 | no_redisplay = direct_output_forward_char (1); | |
929 | goto directly_done; | |
930 | } | |
931 | else if (EQ (cmd, Qbackward_char) && point > BEGV) | |
932 | { | |
933 | struct Lisp_Vector *dp | |
934 | = window_display_table (XWINDOW (selected_window)); | |
935 | SET_PT (point - 1); | |
936 | lose = FETCH_CHAR (point); | |
937 | if (((dp == 0 && lose >= 040 && lose < 0177) | |
938 | || | |
939 | (dp && (XTYPE (dp->contents[lose]) != Lisp_String | |
940 | || XSTRING (dp->contents[lose])->size == sizeof (GLYPH)))) | |
284f4730 JB |
941 | && (XFASTINT (XWINDOW (selected_window)->last_modified) |
942 | >= MODIFF) | |
943 | && (XFASTINT (XWINDOW (selected_window)->last_point) | |
944 | == point + 1) | |
945 | && !windows_or_buffers_changed | |
946 | && EQ (current_buffer->selective_display, Qnil) | |
947 | && !detect_input_pending () | |
948 | && NILP (Vexecuting_macro)) | |
949 | no_redisplay = direct_output_forward_char (-1); | |
950 | goto directly_done; | |
951 | } | |
952 | else if (EQ (cmd, Qself_insert_command) | |
953 | /* Try this optimization only on ascii keystrokes. */ | |
954 | && XTYPE (last_command_char) == Lisp_Int) | |
955 | { | |
956 | unsigned char c = XINT (last_command_char); | |
957 | ||
958 | if (NILP (Vexecuting_macro) && | |
959 | !EQ (minibuf_window, selected_window)) | |
960 | { | |
961 | if (!nonundocount || nonundocount >= 20) | |
962 | { | |
963 | Fundo_boundary (); | |
964 | nonundocount = 0; | |
965 | } | |
966 | nonundocount++; | |
967 | } | |
968 | lose = (XFASTINT (XWINDOW (selected_window)->last_modified) | |
969 | < MODIFF) | |
970 | || (XFASTINT (XWINDOW (selected_window)->last_point) | |
971 | != point) | |
972 | || MODIFF <= current_buffer->save_modified | |
973 | || windows_or_buffers_changed | |
974 | || !EQ (current_buffer->selective_display, Qnil) | |
975 | || detect_input_pending () | |
976 | || !NILP (Vexecuting_macro); | |
977 | if (internal_self_insert (c, 0)) | |
978 | { | |
979 | lose = 1; | |
980 | nonundocount = 0; | |
981 | } | |
982 | if (!lose && | |
983 | (point == ZV || FETCH_CHAR (point) == '\n')) | |
984 | { | |
985 | struct Lisp_Vector *dp | |
986 | = window_display_table (XWINDOW (selected_window)); | |
987 | ||
988 | if (dp == 0 || XTYPE (dp->contents[c]) != Lisp_String) | |
989 | no_redisplay = direct_output_for_insert (c); | |
990 | else if (XSTRING (dp->contents[c])->size | |
991 | == sizeof (GLYPH)) | |
992 | no_redisplay = | |
993 | direct_output_for_insert (*(GLYPH *)XSTRING (dp->contents[c])->data); | |
994 | } | |
995 | goto directly_done; | |
996 | } | |
997 | } | |
998 | ||
999 | /* Here for a command that isn't executed directly */ | |
1000 | ||
1001 | nonundocount = 0; | |
1002 | if (NILP (Vprefix_arg)) | |
1003 | Fundo_boundary (); | |
1004 | Fcommand_execute (cmd, Qnil); | |
1005 | ||
284f4730 | 1006 | } |
a764a753 | 1007 | directly_done: ; |
284f4730 JB |
1008 | |
1009 | /* If there is a prefix argument, | |
1010 | 1) We don't want last_command to be ``universal-argument'' | |
1011 | (that would be dumb), so don't set last_command, | |
1012 | 2) we want to leave echoing on so that the prefix will be | |
1013 | echoed as part of this key sequence, so don't call | |
1014 | cancel_echoing, and | |
1015 | 3) we want to leave this_command_key_count non-zero, so that | |
1016 | read_char will realize that it is re-reading a character, and | |
1017 | not echo it a second time. */ | |
1018 | if (NILP (Vprefix_arg)) | |
1019 | { | |
1020 | last_command = this_command; | |
1021 | cancel_echoing (); | |
1022 | this_command_key_count = 0; | |
1023 | } | |
1024 | } | |
1025 | } | |
1026 | \f | |
1027 | /* Number of seconds between polling for input. */ | |
1028 | int polling_period; | |
1029 | ||
1030 | /* Nonzero means polling for input is temporarily suppresed. */ | |
1031 | int poll_suppress_count; | |
1032 | ||
1033 | #ifdef POLL_FOR_INPUT | |
1034 | int polling_for_input; | |
1035 | ||
1036 | /* Handle an alarm once each second and read pending input | |
1037 | so as to handle a C-g if it comces in. */ | |
1038 | ||
1039 | SIGTYPE | |
1040 | input_poll_signal () | |
1041 | { | |
1042 | #ifdef HAVE_X_WINDOWS | |
1043 | extern int x_input_blocked; | |
1044 | if (x_input_blocked == 0) | |
1045 | #endif | |
1046 | if (!waiting_for_input) | |
1047 | read_avail_input (0); | |
1048 | signal (SIGALRM, input_poll_signal); | |
1049 | alarm (polling_period); | |
1050 | } | |
1051 | ||
1052 | #endif | |
1053 | ||
1054 | /* Begin signals to poll for input, if they are appropriate. | |
1055 | This function is called unconditionally from various places. */ | |
1056 | ||
1057 | start_polling () | |
1058 | { | |
1059 | #ifdef POLL_FOR_INPUT | |
1060 | if (read_socket_hook) | |
1061 | { | |
1062 | poll_suppress_count--; | |
1063 | if (poll_suppress_count == 0) | |
1064 | { | |
1065 | signal (SIGALRM, input_poll_signal); | |
1066 | polling_for_input = 1; | |
1067 | alarm (polling_period); | |
1068 | } | |
1069 | } | |
1070 | #endif | |
1071 | } | |
1072 | ||
1073 | /* Turn off polling. */ | |
1074 | ||
1075 | stop_polling () | |
1076 | { | |
1077 | #ifdef POLL_FOR_INPUT | |
1078 | if (read_socket_hook) | |
1079 | { | |
1080 | if (poll_suppress_count == 0) | |
1081 | { | |
1082 | polling_for_input = 0; | |
1083 | alarm (0); | |
1084 | } | |
1085 | poll_suppress_count++; | |
1086 | } | |
1087 | #endif | |
1088 | } | |
1089 | \f | |
1090 | /* Input of single characters from keyboard */ | |
1091 | ||
1092 | Lisp_Object print_help (); | |
1093 | static Lisp_Object kbd_buffer_get_event (); | |
1094 | ||
1095 | /* read a character from the keyboard; call the redisplay if needed */ | |
1096 | /* commandflag 0 means do not do auto-saving, but do do redisplay. | |
1097 | -1 means do not do redisplay, but do do autosaving. | |
1098 | 1 means do both. */ | |
1099 | ||
7d6de002 RS |
1100 | /* The arguments MAPS and NMAPS are for menu prompting. |
1101 | MAPS is an array of keymaps; NMAPS is the length of MAPS. | |
1102 | ||
1103 | PREV_EVENT is the previous input event, or nil if we are reading | |
1104 | the first event of a key sequence. | |
1105 | ||
6569cc8d JB |
1106 | If USED_MOUSE_MENU is non-zero, then we set *USED_MOUSE_MENU to 1 |
1107 | if we used a mouse menu to read the input, or zero otherwise. If | |
1108 | USED_MOUSE_MENU is zero, *USED_MOUSE_MENU is left alone. */ | |
7d6de002 | 1109 | |
284f4730 | 1110 | Lisp_Object |
7d6de002 | 1111 | read_char (commandflag, nmaps, maps, prev_event, used_mouse_menu) |
284f4730 | 1112 | int commandflag; |
7d6de002 RS |
1113 | int nmaps; |
1114 | Lisp_Object *maps; | |
1115 | Lisp_Object prev_event; | |
1116 | int *used_mouse_menu; | |
284f4730 JB |
1117 | { |
1118 | register Lisp_Object c; | |
1119 | int count; | |
1120 | jmp_buf save_jump; | |
1121 | ||
1122 | if (!NILP (unread_command_char)) | |
1123 | { | |
1124 | c = unread_command_char; | |
1125 | unread_command_char = Qnil; | |
1126 | ||
284f4730 JB |
1127 | if (this_command_key_count == 0) |
1128 | goto reread_first; | |
1129 | else | |
1130 | goto reread; | |
1131 | } | |
1132 | ||
1133 | if (!NILP (Vexecuting_macro)) | |
1134 | { | |
fce33686 JB |
1135 | /* We set this to Qmacro; since that's not a frame, nobody will |
1136 | try to switch frames on us, and the selected window will | |
1137 | remain unchanged. | |
1138 | ||
1139 | Since this event came from a macro, it would be misleading to | |
1140 | leave Vlast_event_frame set to whereever the last real event | |
1141 | came from. Normally, command_loop_1 selects | |
1142 | Vlast_event_frame after each command is read, but events read | |
1143 | from a macro should never cause a new frame to be selected. */ | |
1144 | Vlast_event_frame = Qmacro; | |
1145 | ||
284f4730 JB |
1146 | if (executing_macro_index >= Flength (Vexecuting_macro)) |
1147 | { | |
1148 | XSET (c, Lisp_Int, -1); | |
1149 | return c; | |
1150 | } | |
1151 | ||
1152 | c = Faref (Vexecuting_macro, make_number (executing_macro_index)); | |
1153 | executing_macro_index++; | |
1154 | ||
1155 | goto from_macro; | |
1156 | } | |
1157 | ||
cd21b839 JB |
1158 | if (!NILP (unread_switch_frame)) |
1159 | { | |
1160 | c = unread_switch_frame; | |
1161 | unread_switch_frame = Qnil; | |
1162 | ||
1163 | /* This event should make it into this_command_keys, and get echoed | |
1164 | again, so we go to reread, rather than reread_first. */ | |
1165 | goto reread; | |
1166 | } | |
1167 | ||
284f4730 | 1168 | /* Save outer setjmp data, in case called recursively. */ |
f76475ad | 1169 | save_getcjmp (save_jump); |
284f4730 JB |
1170 | |
1171 | stop_polling (); | |
1172 | ||
1173 | if (commandflag >= 0 && !input_pending && !detect_input_pending ()) | |
1174 | redisplay (); | |
1175 | ||
1176 | if (_setjmp (getcjmp)) | |
1177 | { | |
1178 | XSET (c, Lisp_Int, quit_char); | |
ff11dfa1 | 1179 | XSET (Vlast_event_frame, Lisp_Frame, selected_frame); |
284f4730 | 1180 | |
284f4730 JB |
1181 | goto non_reread; |
1182 | } | |
1183 | ||
1184 | /* Message turns off echoing unless more keystrokes turn it on again. */ | |
1185 | if (echo_area_glyphs && *echo_area_glyphs && echo_area_glyphs != echobuf) | |
1186 | cancel_echoing (); | |
1187 | else | |
1188 | /* If already echoing, continue. */ | |
1189 | echo_dash (); | |
1190 | ||
1191 | /* If in middle of key sequence and minibuffer not active, | |
1192 | start echoing if enough time elapses. */ | |
1193 | if (minibuf_level == 0 && !immediate_echo && this_command_key_count > 0 | |
1194 | && echo_keystrokes > 0 | |
1195 | && (echo_area_glyphs == 0 || *echo_area_glyphs == 0)) | |
1196 | { | |
1197 | Lisp_Object tem0; | |
1198 | ||
7d6de002 RS |
1199 | /* After a mouse event, start echoing right away. |
1200 | This is because we are probably about to display a menu, | |
1201 | and we don't want to delay before doing so. */ | |
1202 | if (XTYPE (prev_event) == Lisp_Cons) | |
284f4730 | 1203 | echo (); |
7d6de002 RS |
1204 | else |
1205 | { | |
1206 | tem0 = sit_for (echo_keystrokes, 0, 1, 1); | |
1207 | if (EQ (tem0, Qt)) | |
1208 | echo (); | |
1209 | } | |
284f4730 JB |
1210 | } |
1211 | ||
1212 | /* Maybe auto save due to number of keystrokes or idle time. */ | |
1213 | ||
1214 | if (commandflag != 0 | |
1215 | && auto_save_interval > 0 | |
51172b6d | 1216 | && num_nonmacro_input_chars - last_auto_save > max (auto_save_interval, 20) |
284f4730 JB |
1217 | && !detect_input_pending ()) |
1218 | { | |
1219 | jmp_buf temp; | |
1220 | save_getcjmp (temp); | |
1221 | Fdo_auto_save (Qnil, Qnil); | |
1222 | restore_getcjmp (temp); | |
1223 | } | |
1224 | ||
7d6de002 RS |
1225 | /* Try reading a character via menu prompting. |
1226 | Try this before the sit-for, because the sit-for | |
1227 | would do the wrong thing if we are supposed to do | |
1228 | menu prompting. */ | |
1229 | c = Qnil; | |
1230 | if (INTERACTIVE && !NILP (prev_event)) | |
1231 | c = read_char_menu_prompt (nmaps, maps, prev_event, used_mouse_menu); | |
1232 | ||
284f4730 JB |
1233 | /* Slow down auto saves logarithmically in size of current buffer, |
1234 | and garbage collect while we're at it. */ | |
7d6de002 RS |
1235 | if (NILP (c)) |
1236 | { | |
1237 | int delay_level, buffer_size; | |
1238 | ||
1239 | if (! MINI_WINDOW_P (XWINDOW (selected_window))) | |
1240 | last_non_minibuf_size = Z - BEG; | |
1241 | buffer_size = (last_non_minibuf_size >> 8) + 1; | |
1242 | delay_level = 0; | |
1243 | while (buffer_size > 64) | |
1244 | delay_level++, buffer_size -= buffer_size >> 2; | |
1245 | if (delay_level < 4) delay_level = 4; | |
1246 | /* delay_level is 4 for files under around 50k, 7 at 100k, | |
1247 | 9 at 200k, 11 at 300k, and 12 at 500k. It is 15 at 1 meg. */ | |
1248 | ||
1249 | /* Auto save if enough time goes by without input. */ | |
1250 | if (commandflag != 0 | |
51172b6d | 1251 | && num_nonmacro_input_chars > last_auto_save |
7d6de002 RS |
1252 | && XTYPE (Vauto_save_timeout) == Lisp_Int |
1253 | && XINT (Vauto_save_timeout) > 0) | |
1254 | { | |
1255 | Lisp_Object tem0; | |
1256 | int delay = delay_level * XFASTINT (Vauto_save_timeout) / 4; | |
1257 | tem0 = sit_for (delay, 0, 1, 1); | |
1258 | if (EQ (tem0, Qt)) | |
1259 | { | |
1260 | jmp_buf temp; | |
1261 | save_getcjmp (temp); | |
1262 | Fdo_auto_save (Qnil, Qnil); | |
1263 | restore_getcjmp (temp); | |
1264 | ||
1265 | /* If we have auto-saved and there is still no input | |
1266 | available, garbage collect if there has been enough | |
1267 | consing going on to make it worthwhile. */ | |
1268 | if (!detect_input_pending () | |
1269 | && consing_since_gc > gc_cons_threshold / 2) | |
1270 | Fgarbage_collect (); | |
1271 | } | |
1272 | } | |
1273 | } | |
284f4730 JB |
1274 | |
1275 | /* Actually read a character, waiting if necessary. */ | |
7d6de002 RS |
1276 | if (NILP (c)) |
1277 | c = kbd_buffer_get_event (); | |
284f4730 JB |
1278 | |
1279 | if (NILP (c)) | |
1280 | abort (); /* Don't think this can happen. */ | |
1281 | ||
284f4730 | 1282 | /* Terminate Emacs in batch mode if at eof. */ |
7d6de002 | 1283 | if (noninteractive && XTYPE (c) == Lisp_Int && XINT (c) < 0) |
284f4730 JB |
1284 | Fkill_emacs (make_number (1)); |
1285 | ||
1286 | non_reread: | |
1287 | ||
f76475ad | 1288 | restore_getcjmp (save_jump); |
284f4730 JB |
1289 | |
1290 | start_polling (); | |
1291 | ||
1292 | echo_area_glyphs = 0; | |
1293 | ||
1294 | /* Handle things that only apply to characters. */ | |
1295 | if (XTYPE (c) == Lisp_Int) | |
1296 | { | |
1297 | /* If kbd_buffer_get_event gave us an EOF, return that. */ | |
1298 | if (XINT (c) < 0) | |
1299 | return c; | |
1300 | ||
1301 | /* Strip the high bits, and maybe the meta bit too. */ | |
1302 | XSETINT (c, c & (meta_key ? 0377 : 0177)); | |
1303 | ||
1304 | if (XTYPE (Vkeyboard_translate_table) == Lisp_String | |
1305 | && XSTRING (Vkeyboard_translate_table)->size > XINT (c)) | |
1306 | XSETINT (c, XSTRING (Vkeyboard_translate_table)->data[c]); | |
1307 | } | |
1308 | ||
1309 | total_keys++; | |
5160df46 JB |
1310 | XVECTOR (recent_keys)->contents[recent_keys_index] = c; |
1311 | if (++recent_keys_index >= NUM_RECENT_KEYS) | |
284f4730 JB |
1312 | recent_keys_index = 0; |
1313 | ||
1314 | /* Write c to the dribble file. If c is a lispy event, write | |
1315 | the event's symbol to the dribble file, in <brackets>. Bleaugh. | |
1316 | If you, dear reader, have a better idea, you've got the source. :-) */ | |
1317 | if (dribble) | |
1318 | { | |
1319 | if (XTYPE (c) == Lisp_Int) | |
1320 | putc (c, dribble); | |
1321 | else | |
1322 | { | |
1323 | Lisp_Object dribblee = c; | |
1324 | ||
1325 | /* If it's a structured event, take the event header. */ | |
88cb0656 | 1326 | dribblee = EVENT_HEAD (dribblee); |
284f4730 JB |
1327 | |
1328 | if (XTYPE (c) == Lisp_Symbol) | |
1329 | { | |
1330 | putc ('<', dribble); | |
1331 | fwrite (XSYMBOL (c)->name->data, sizeof (char), | |
1332 | XSYMBOL (c)->name->size, | |
1333 | dribble); | |
1334 | putc ('>', dribble); | |
1335 | } | |
1336 | } | |
1337 | ||
1338 | fflush (dribble); | |
1339 | } | |
1340 | ||
1341 | store_kbd_macro_char (c); | |
1342 | ||
51172b6d RS |
1343 | num_nonmacro_input_chars++; |
1344 | ||
284f4730 JB |
1345 | from_macro: |
1346 | reread_first: | |
1347 | echo_char (c); | |
1348 | ||
1349 | /* Record this character as part of the current key. */ | |
1350 | add_command_key (c); | |
1351 | ||
1352 | /* Re-reading in the middle of a command */ | |
1353 | reread: | |
1354 | last_input_char = c; | |
1355 | num_input_chars++; | |
1356 | ||
1357 | /* Process the help character specially if enabled */ | |
1358 | if (EQ (c, help_char) && !NILP (Vhelp_form)) | |
1359 | { | |
1360 | Lisp_Object tem0; | |
1361 | count = specpdl_ptr - specpdl; | |
1362 | ||
1363 | record_unwind_protect (Fset_window_configuration, | |
1364 | Fcurrent_window_configuration (Qnil)); | |
1365 | ||
1366 | tem0 = Feval (Vhelp_form); | |
1367 | if (XTYPE (tem0) == Lisp_String) | |
1368 | internal_with_output_to_temp_buffer ("*Help*", print_help, tem0); | |
1369 | ||
1370 | cancel_echoing (); | |
6569cc8d | 1371 | c = read_char (0, 0, 0, Qnil, 0); |
ff11dfa1 | 1372 | /* Remove the help from the frame */ |
284f4730 JB |
1373 | unbind_to (count, Qnil); |
1374 | redisplay (); | |
1375 | if (EQ (c, make_number (040))) | |
1376 | { | |
1377 | cancel_echoing (); | |
7d6de002 | 1378 | c = read_char (0, 0, 0, Qnil, 0); |
284f4730 JB |
1379 | } |
1380 | } | |
1381 | ||
1382 | return c; | |
1383 | } | |
1384 | ||
1385 | Lisp_Object | |
1386 | print_help (object) | |
1387 | Lisp_Object object; | |
1388 | { | |
1389 | Fprinc (object, Qnil); | |
1390 | return Qnil; | |
1391 | } | |
1392 | ||
1393 | /* Copy out or in the info on where C-g should throw to. | |
1394 | This is used when running Lisp code from within get_char, | |
1395 | in case get_char is called recursively. | |
1396 | See read_process_output. */ | |
1397 | ||
1398 | save_getcjmp (temp) | |
1399 | jmp_buf temp; | |
1400 | { | |
1401 | bcopy (getcjmp, temp, sizeof getcjmp); | |
1402 | } | |
1403 | ||
1404 | restore_getcjmp (temp) | |
1405 | jmp_buf temp; | |
1406 | { | |
1407 | bcopy (temp, getcjmp, sizeof getcjmp); | |
1408 | } | |
1409 | ||
1410 | \f | |
1411 | /* Low level keyboard/mouse input. | |
1412 | kbd_buffer_store_event places events in kbd_buffer, and | |
1413 | kbd_buffer_get_event retrieves them. | |
1414 | mouse_moved indicates when the mouse has moved again, and | |
1415 | *mouse_position_hook provides the mouse position. */ | |
1416 | ||
1417 | /* Set this for debugging, to have a way to get out */ | |
1418 | int stop_character; | |
1419 | ||
ff11dfa1 | 1420 | extern int frame_garbaged; |
284f4730 JB |
1421 | |
1422 | /* Return true iff there are any events in the queue that read-char | |
1423 | would return. If this returns false, a read-char would block. */ | |
1424 | static int | |
1425 | readable_events () | |
1426 | { | |
88cb0656 | 1427 | return ! EVENT_QUEUES_EMPTY; |
284f4730 JB |
1428 | } |
1429 | ||
1430 | ||
1431 | /* Restore mouse tracking enablement. See Ftrack_mouse for the only use | |
1432 | of this function. */ | |
1433 | static Lisp_Object | |
1434 | tracking_off (old_value) | |
1435 | Lisp_Object old_value; | |
1436 | { | |
1437 | if (! XFASTINT (old_value)) | |
1438 | { | |
1439 | do_mouse_tracking = 0; | |
1440 | ||
1441 | /* Redisplay may have been preempted because there was input | |
1442 | available, and it assumes it will be called again after the | |
1443 | input has been processed. If the only input available was | |
1444 | the sort that we have just disabled, then we need to call | |
1445 | redisplay. */ | |
1446 | if (!readable_events ()) | |
1447 | { | |
1448 | redisplay_preserve_echo_area (); | |
1449 | get_input_pending (&input_pending); | |
1450 | } | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | DEFUN ("track-mouse", Ftrack_mouse, Strack_mouse, 0, UNEVALLED, 0, | |
1455 | "Evaluate BODY with mouse movement and button release events enabled.\n\ | |
3371bdfc RS |
1456 | Within a `track-mouse', mouse motion and button releases generate input\n\ |
1457 | events that you can read with `read-event'.\n\ | |
1458 | Normally, these occurrences don't generate events.") | |
284f4730 JB |
1459 | (args) |
1460 | Lisp_Object args; | |
1461 | { | |
1462 | int count = specpdl_ptr - specpdl; | |
1463 | Lisp_Object val; | |
1464 | ||
1465 | XSET (val, Lisp_Int, do_mouse_tracking); | |
1466 | record_unwind_protect (tracking_off, val); | |
1467 | ||
1468 | do_mouse_tracking = 1; | |
1469 | ||
1470 | val = Fprogn (args); | |
1471 | return unbind_to (count, val); | |
1472 | } | |
1473 | ||
1474 | /* Store an event obtained at interrupt level into kbd_buffer, fifo */ | |
1475 | ||
1476 | void | |
1477 | kbd_buffer_store_event (event) | |
1478 | register struct input_event *event; | |
1479 | { | |
1480 | if (event->kind == no_event) | |
1481 | abort (); | |
1482 | ||
1483 | if (event->kind == ascii_keystroke) | |
1484 | { | |
1485 | register int c = XFASTINT (event->code) & 0377; | |
1486 | ||
1487 | if (c == quit_char | |
1488 | || ((c == (0200 | quit_char)) && !meta_key)) | |
1489 | { | |
3e51c7b7 JB |
1490 | extern SIGTYPE interrupt_signal (); |
1491 | ||
284f4730 | 1492 | /* If this results in a quit_char being returned to Emacs as |
ff11dfa1 | 1493 | input, set last-event-frame properly. If this doesn't |
284f4730 | 1494 | get returned to Emacs as an event, the next event read |
ff11dfa1 | 1495 | will set Vlast_event_frame again, so this is safe to do. */ |
ff11dfa1 | 1496 | Vlast_event_frame = FRAME_FOCUS_FRAME (event->frame); |
3e51c7b7 | 1497 | |
ffd56f97 | 1498 | last_event_timestamp = event->timestamp; |
284f4730 JB |
1499 | interrupt_signal (); |
1500 | return; | |
1501 | } | |
1502 | ||
1503 | if (c && c == stop_character) | |
1504 | { | |
1505 | sys_suspend (); | |
1506 | return; | |
1507 | } | |
1508 | ||
1509 | XSET (event->code, Lisp_Int, c); | |
1510 | } | |
1511 | ||
1512 | if (kbd_store_ptr - kbd_buffer == KBD_BUFFER_SIZE) | |
1513 | kbd_store_ptr = kbd_buffer; | |
1514 | ||
1515 | /* Don't let the very last slot in the buffer become full, | |
1516 | since that would make the two pointers equal, | |
1517 | and that is indistinguishable from an empty buffer. | |
1518 | Discard the event if it would fill the last slot. */ | |
1519 | if (kbd_fetch_ptr - 1 != kbd_store_ptr) | |
1520 | { | |
1521 | kbd_store_ptr->kind = event->kind; | |
1522 | kbd_store_ptr->code = event->code; | |
1523 | kbd_store_ptr->part = event->part; | |
ff11dfa1 | 1524 | kbd_store_ptr->frame = event->frame; |
284f4730 JB |
1525 | kbd_store_ptr->modifiers = event->modifiers; |
1526 | kbd_store_ptr->x = event->x; | |
1527 | kbd_store_ptr->y = event->y; | |
1528 | kbd_store_ptr->timestamp = event->timestamp; | |
1529 | ||
1530 | kbd_store_ptr++; | |
1531 | } | |
1532 | } | |
1533 | ||
1534 | static Lisp_Object make_lispy_event (); | |
1535 | static Lisp_Object make_lispy_movement (); | |
1536 | static Lisp_Object modify_event_symbol (); | |
cd21b839 | 1537 | static Lisp_Object make_lispy_switch_frame (); |
284f4730 JB |
1538 | |
1539 | static Lisp_Object | |
1540 | kbd_buffer_get_event () | |
1541 | { | |
1542 | register int c; | |
1543 | Lisp_Object obj; | |
1544 | ||
1545 | if (noninteractive) | |
1546 | { | |
1547 | c = getchar (); | |
1548 | XSET (obj, Lisp_Int, c); | |
1549 | return obj; | |
1550 | } | |
1551 | ||
1552 | /* Wait until there is input available. */ | |
1553 | for (;;) | |
1554 | { | |
284f4730 JB |
1555 | if (!EVENT_QUEUES_EMPTY) |
1556 | break; | |
1557 | ||
1558 | /* If the quit flag is set, then read_char will return | |
1559 | quit_char, so that counts as "available input." */ | |
1560 | if (!NILP (Vquit_flag)) | |
1561 | quit_throw_to_read_char (); | |
1562 | ||
1563 | /* One way or another, wait until input is available; then, if | |
1564 | interrupt handlers have not read it, read it now. */ | |
1565 | ||
1566 | #ifdef OLDVMS | |
1567 | wait_for_kbd_input (); | |
1568 | #else | |
1569 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
1570 | #ifdef SIGIO | |
1571 | gobble_input (0); | |
1572 | #endif /* SIGIO */ | |
1573 | if (EVENT_QUEUES_EMPTY) | |
1574 | { | |
f76475ad JB |
1575 | Lisp_Object minus_one; |
1576 | ||
1577 | XSET (minus_one, Lisp_Int, -1); | |
1578 | wait_reading_process_input (0, 0, minus_one, 1); | |
284f4730 JB |
1579 | |
1580 | if (!interrupt_input && EVENT_QUEUES_EMPTY) | |
1581 | { | |
1582 | read_avail_input (0); | |
1583 | } | |
1584 | } | |
1585 | #endif /* not VMS */ | |
1586 | } | |
1587 | ||
1588 | /* At this point, we know that there is a readable event available | |
1589 | somewhere. If the event queue is empty, then there must be a | |
1590 | mouse movement enabled and available. */ | |
1591 | if (kbd_fetch_ptr != kbd_store_ptr) | |
1592 | { | |
cd21b839 JB |
1593 | struct input_event *event; |
1594 | Lisp_Object frame; | |
3e51c7b7 | 1595 | |
856bf263 | 1596 | event = ((kbd_fetch_ptr < kbd_buffer + KBD_BUFFER_SIZE) |
cd21b839 JB |
1597 | ? kbd_fetch_ptr |
1598 | : kbd_buffer); | |
3e51c7b7 | 1599 | |
cd21b839 JB |
1600 | last_event_timestamp = event->timestamp; |
1601 | XSET (frame, Lisp_Frame, XFRAME (FRAME_FOCUS_FRAME (event->frame))); | |
1602 | ||
1603 | /* If this event is on a different frame, return a switch-frame this | |
1604 | time, and leave the event in the queue for next time. */ | |
1605 | if (! EQ (frame, Vlast_event_frame)) | |
1606 | { | |
1607 | Vlast_event_frame = frame; | |
1608 | obj = make_lispy_switch_frame (frame); | |
1609 | } | |
1610 | else | |
1611 | { | |
1612 | obj = make_lispy_event (event); | |
1613 | if (XTYPE (obj) == Lisp_Int) | |
1614 | XSET (obj, Lisp_Int, XINT (obj) & (meta_key ? 0377 : 0177)); | |
1615 | ||
1616 | /* Wipe out this event, to catch bugs. */ | |
1617 | event->kind = no_event; | |
1618 | ||
1619 | kbd_fetch_ptr = event + 1; | |
1620 | } | |
284f4730 JB |
1621 | } |
1622 | else if (do_mouse_tracking && mouse_moved) | |
1623 | { | |
ff11dfa1 | 1624 | FRAME_PTR frame; |
e5d77022 JB |
1625 | Lisp_Object x, y; |
1626 | unsigned long time; | |
284f4730 | 1627 | |
ff11dfa1 | 1628 | (*mouse_position_hook) (&frame, &x, &y, &time); |
284f4730 | 1629 | |
6f97c96a JB |
1630 | /* Decide if we should generate a switch-frame event. Don't generate |
1631 | switch-frame events for motion outside of all Emacs frames. */ | |
1632 | if (frame && frame != XFRAME (Vlast_event_frame)) | |
cd21b839 JB |
1633 | { |
1634 | XSET (Vlast_event_frame, Lisp_Frame, frame); | |
1635 | obj = make_lispy_switch_frame (Vlast_event_frame); | |
1636 | } | |
1637 | else | |
1638 | obj = make_lispy_movement (frame, x, y, time); | |
284f4730 JB |
1639 | } |
1640 | else | |
1641 | /* We were promised by the above while loop that there was | |
1642 | something for us to read! */ | |
1643 | abort (); | |
1644 | ||
1645 | input_pending = readable_events (); | |
1646 | ||
1647 | return (obj); | |
1648 | } | |
1649 | ||
1650 | /* Caches for modify_event_symbol. */ | |
1651 | static Lisp_Object func_key_syms; | |
1652 | static Lisp_Object mouse_syms; | |
1653 | ||
1654 | /* You'll notice that this table is arranged to be conveniently | |
1655 | indexed by X Windows keysym values. */ | |
1656 | static char *lispy_function_keys[] = | |
1657 | { | |
1658 | /* X Keysym value */ | |
1659 | ||
1660 | "home", /* 0xff50 */ /* IsCursorKey */ | |
1661 | "left", | |
1662 | "up", | |
1663 | "right", | |
1664 | "down", | |
1665 | "prior", | |
1666 | "next", | |
1667 | "end", | |
1668 | "begin", | |
1669 | 0, /* 0xff59 */ | |
1670 | 0, 0, 0, 0, 0, 0, | |
1671 | "select", /* 0xff60 */ /* IsMiscFunctionKey */ | |
1672 | "print", | |
1673 | "execute", | |
1674 | "insert", | |
1675 | 0, /* 0xff64 */ | |
1676 | "undo", | |
1677 | "redo", | |
1678 | "menu", | |
1679 | "find", | |
1680 | "cancel", | |
1681 | "help", | |
1682 | "break", /* 0xff6b */ | |
1683 | ||
1684 | /* Here are some keys found mostly on HP keyboards. The X event | |
1685 | handling code will strip bit 29, which flags vendor-specific | |
1686 | keysyms. */ | |
1687 | "reset", /* 0x1000ff6c */ | |
1688 | "system", | |
1689 | "user", | |
1690 | "clearline", | |
1691 | "insertline", | |
1692 | "deleteline", | |
1693 | "insertchar", | |
1694 | "deletechar", | |
1695 | "backtab", | |
1696 | "kp_backtab", /* 0x1000ff75 */ | |
1697 | 0, /* 0xff76 */ | |
1698 | 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff7f */ | |
1699 | "kp-space", /* 0xff80 */ /* IsKeypadKey */ | |
1700 | 0, 0, 0, 0, 0, 0, 0, 0, | |
1701 | "kp-tab", /* 0xff89 */ | |
1702 | 0, 0, 0, | |
1703 | "kp-enter", /* 0xff8d */ | |
1704 | 0, 0, 0, | |
1705 | "kp-f1", /* 0xff91 */ | |
1706 | "kp-f2", | |
1707 | "kp-f3", | |
1708 | "kp-f4", | |
1709 | 0, /* 0xff95 */ | |
1710 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
1711 | "kp-multiply", /* 0xffaa */ | |
1712 | "kp-add", | |
1713 | "kp-separator", | |
1714 | "kp-subtract", | |
1715 | "kp-decimal", | |
1716 | "kp-divide", /* 0xffaf */ | |
1717 | "kp-0", /* 0xffb0 */ | |
1718 | "kp-1", "kp-2", "kp-3", "kp-4", "kp-5", "kp-6", "kp-7", "kp-8", "kp-9", | |
1719 | 0, /* 0xffba */ | |
1720 | 0, 0, | |
1721 | "kp-equal", /* 0xffbd */ | |
1722 | "f1", /* 0xffbe */ /* IsFunctionKey */ | |
1723 | "f2", "f3", "f4", | |
1724 | "f5", "f6", "f7", "f8", "f9", "f10", "f11", "f12", | |
1725 | "f13", "f14", "f15", "f16", "f17", "f18", "f19", "f20", | |
1726 | "f21", "f22", "f23", "f24", "f25", "f26", "f27", "f28", | |
1727 | "f29", "f30", "f31", "f32", "f33", "f34", "f35" /* 0xffe0 */ | |
1728 | }; | |
1729 | ||
1730 | static char *lispy_mouse_names[] = | |
1731 | { | |
1732 | "mouse-1", "mouse-2", "mouse-3", "mouse-4", "mouse-5" | |
1733 | }; | |
1734 | ||
88cb0656 JB |
1735 | /* make_lispy_event stores the down-going location of the currently |
1736 | depressed buttons in button_down_locations. */ | |
1737 | struct mouse_position { | |
1738 | Lisp_Object window; | |
1739 | Lisp_Object buffer_pos; | |
1740 | Lisp_Object x, y; | |
1741 | Lisp_Object timestamp; | |
1742 | }; | |
1743 | static struct mouse_position button_down_location[NUM_MOUSE_BUTTONS]; | |
1744 | ||
284f4730 JB |
1745 | /* Given a struct input_event, build the lisp event which represents |
1746 | it. If EVENT is 0, build a mouse movement event from the mouse | |
88cb0656 JB |
1747 | movement buffer, which should have a movement event in it. |
1748 | ||
1749 | Note that events must be passed to this function in the order they | |
1750 | are received; this function stores the location of button presses | |
1751 | in order to build drag events when the button is released. */ | |
284f4730 JB |
1752 | |
1753 | static Lisp_Object | |
1754 | make_lispy_event (event) | |
1755 | struct input_event *event; | |
1756 | { | |
1757 | #ifdef SWITCH_ENUM_BUG | |
1758 | switch ((int) event->kind) | |
1759 | #else | |
1760 | switch (event->kind) | |
1761 | #endif | |
1762 | { | |
284f4730 JB |
1763 | /* A simple keystroke. */ |
1764 | case ascii_keystroke: | |
0a7f1fc0 | 1765 | return XFASTINT (event->code); |
284f4730 JB |
1766 | break; |
1767 | ||
1768 | /* A function key. The symbol may need to have modifier prefixes | |
1769 | tacked onto it. */ | |
1770 | case non_ascii_keystroke: | |
1771 | return modify_event_symbol (XFASTINT (event->code), event->modifiers, | |
1772 | Qfunction_key, | |
1773 | lispy_function_keys, &func_key_syms, | |
1774 | (sizeof (lispy_function_keys) | |
1775 | / sizeof (lispy_function_keys[0]))); | |
1776 | break; | |
1777 | ||
88cb0656 JB |
1778 | /* A mouse click. Figure out where it is, decide whether it's |
1779 | a press, click or drag, and build the appropriate structure. */ | |
284f4730 JB |
1780 | case mouse_click: |
1781 | { | |
0a7f1fc0 | 1782 | int button = XFASTINT (event->code); |
284f4730 | 1783 | int part; |
88cb0656 | 1784 | Lisp_Object window; |
284f4730 | 1785 | Lisp_Object posn; |
88cb0656 | 1786 | struct mouse_position *loc; |
284f4730 | 1787 | |
0a7f1fc0 | 1788 | if (button < 0 || button >= NUM_MOUSE_BUTTONS) |
88cb0656 JB |
1789 | abort (); |
1790 | ||
1791 | /* Where did this mouse click occur? */ | |
1792 | window = window_from_coordinates (event->frame, | |
1793 | XINT (event->x), XINT (event->y), | |
1794 | &part); | |
284f4730 JB |
1795 | if (XTYPE (window) != Lisp_Window) |
1796 | posn = Qnil; | |
1797 | else | |
1798 | { | |
1799 | XSETINT (event->x, (XINT (event->x) | |
1800 | - XINT (XWINDOW (window)->left))); | |
1801 | XSETINT (event->y, (XINT (event->y) | |
1802 | - XINT (XWINDOW (window)->top))); | |
284f4730 JB |
1803 | if (part == 1) |
1804 | posn = Qmode_line; | |
1805 | else if (part == 2) | |
e5d77022 | 1806 | posn = Qvertical_line; |
284f4730 JB |
1807 | else |
1808 | XSET (posn, Lisp_Int, | |
1809 | buffer_posn_from_coords (XWINDOW (window), | |
1810 | XINT (event->x), | |
1811 | XINT (event->y))); | |
1812 | } | |
1813 | ||
88cb0656 JB |
1814 | /* If this is a button press, squirrel away the location, so we |
1815 | can decide later whether it was a click or a drag. */ | |
0a7f1fc0 | 1816 | loc = button_down_location + button; |
88cb0656 JB |
1817 | if (event->modifiers & down_modifier) |
1818 | { | |
1819 | loc->window = window; | |
1820 | loc->buffer_pos = posn; | |
1821 | loc->x = event->x; | |
1822 | loc->y = event->y; | |
1823 | loc->timestamp = event->timestamp; | |
1824 | } | |
1825 | ||
1826 | /* Now we're releasing a button - check the co-ordinates to | |
1827 | see if this was a click or a drag. */ | |
1828 | else if (event->modifiers & up_modifier) | |
1829 | { | |
1830 | event->modifiers &= ~up_modifier; | |
1831 | event->modifiers |= ((event->x == loc->x && event->y == loc->y) | |
1832 | ? click_modifier | |
1833 | : drag_modifier); | |
1834 | } | |
1835 | else | |
1836 | /* Every mouse event should either have the down_modifier or | |
1837 | the up_modifier set. */ | |
1838 | abort (); | |
1839 | ||
1840 | ||
1841 | /* Build the event. */ | |
1842 | { | |
1843 | Lisp_Object head, start, end; | |
1844 | ||
1845 | /* Build the components of the event. */ | |
0a7f1fc0 | 1846 | head = modify_event_symbol (button - 1, |
88cb0656 JB |
1847 | event->modifiers, |
1848 | Qmouse_click, | |
1849 | lispy_mouse_names, &mouse_syms, | |
1850 | (sizeof (lispy_mouse_names) | |
1851 | / sizeof (lispy_mouse_names[0]))); | |
1852 | end = Fcons (window, | |
1853 | Fcons (posn, | |
1854 | Fcons (Fcons (event->x, event->y), | |
1855 | Fcons (make_number (event->timestamp), | |
1856 | Qnil)))); | |
1857 | if (event->modifiers & drag_modifier) | |
1858 | start = Fcons (loc->window, | |
1859 | Fcons (loc->buffer_pos, | |
1860 | Fcons (Fcons (loc->x, loc->y), | |
1861 | Fcons (make_number (loc->timestamp), | |
1862 | Qnil)))); | |
1863 | ||
1864 | /* Assemble the pieces. */ | |
1865 | if (event->modifiers & drag_modifier) | |
1866 | return Fcons (head, | |
1867 | Fcons (start, | |
1868 | Fcons (end, | |
1869 | Qnil))); | |
1870 | else | |
1871 | return Fcons (head, | |
1872 | Fcons (end, | |
1873 | Qnil)); | |
1874 | } | |
284f4730 JB |
1875 | } |
1876 | ||
1877 | /* A scrollbar click. Build a list containing the relevant | |
1878 | information. */ | |
1879 | case scrollbar_click: | |
1880 | { | |
1881 | Lisp_Object button | |
1882 | = modify_event_symbol (XFASTINT (event->code) - 1, | |
1883 | event->modifiers, | |
1884 | Qmouse_click, | |
1885 | lispy_mouse_names, &mouse_syms, | |
1886 | (sizeof (lispy_mouse_names) | |
1887 | / sizeof (lispy_mouse_names[0]))); | |
1888 | return Fcons (event->part, | |
ff11dfa1 | 1889 | Fcons (FRAME_SELECTED_WINDOW (event->frame), |
284f4730 JB |
1890 | Fcons (button, |
1891 | Fcons (Fcons (event->x, event->y), | |
1113d9db JB |
1892 | Fcons (make_number |
1893 | (event->timestamp), | |
284f4730 JB |
1894 | Qnil))))); |
1895 | } | |
1896 | ||
1897 | /* The 'kind' field of the event is something we don't recognize. */ | |
1898 | default: | |
1899 | abort(); | |
1900 | } | |
1901 | } | |
1902 | ||
1903 | static Lisp_Object | |
ff11dfa1 JB |
1904 | make_lispy_movement (frame, x, y, time) |
1905 | FRAME_PTR frame; | |
284f4730 | 1906 | Lisp_Object x, y; |
e5d77022 | 1907 | unsigned long time; |
284f4730 JB |
1908 | { |
1909 | Lisp_Object window; | |
1910 | int ix, iy; | |
1911 | Lisp_Object posn; | |
1912 | int part; | |
1913 | ||
1914 | ix = XINT (x); | |
1915 | iy = XINT (y); | |
ff11dfa1 JB |
1916 | window = (frame |
1917 | ? window_from_coordinates (frame, ix, iy, &part) | |
284f4730 JB |
1918 | : Qnil); |
1919 | if (XTYPE (window) != Lisp_Window) | |
1920 | posn = Qnil; | |
1921 | else | |
1922 | { | |
1923 | ix -= XINT (XWINDOW (window)->left); | |
1924 | iy -= XINT (XWINDOW (window)->top); | |
1925 | if (part == 1) | |
1926 | posn = Qmode_line; | |
1927 | else if (part == 2) | |
e5d77022 | 1928 | posn = Qvertical_line; |
284f4730 JB |
1929 | else |
1930 | XSET (posn, Lisp_Int, buffer_posn_from_coords (XWINDOW (window), | |
1931 | ix, iy)); | |
1932 | } | |
1933 | ||
1934 | XSETINT (x, ix); | |
1935 | XSETINT (y, iy); | |
1936 | return Fcons (Qmouse_movement, | |
88cb0656 JB |
1937 | Fcons (Fcons (window, |
1938 | Fcons (posn, | |
1939 | Fcons (Fcons (x, y), | |
1940 | Fcons (make_number (time), | |
1941 | Qnil)))), | |
1942 | Qnil)); | |
284f4730 JB |
1943 | } |
1944 | ||
1945 | ||
cd21b839 JB |
1946 | /* Construct a switch frame event. */ |
1947 | static Lisp_Object | |
1948 | make_lispy_switch_frame (frame) | |
1949 | Lisp_Object frame; | |
1950 | { | |
1951 | return Fcons (Qswitch_frame, Fcons (frame, Qnil)); | |
1952 | } | |
1953 | ||
0a7f1fc0 JB |
1954 | \f |
1955 | /* Manipulating modifiers. */ | |
284f4730 | 1956 | |
0a7f1fc0 | 1957 | /* Parse the name of SYMBOL, and return the set of modifiers it contains. |
284f4730 | 1958 | |
0a7f1fc0 JB |
1959 | If MODIFIER_END is non-zero, set *MODIFIER_END to the position in |
1960 | SYMBOL's name of the end of the modifiers; the string from this | |
1961 | position is the unmodified symbol name. | |
284f4730 | 1962 | |
0a7f1fc0 JB |
1963 | This doesn't use any caches. */ |
1964 | static int | |
1965 | parse_modifiers_uncached (symbol, modifier_end) | |
284f4730 | 1966 | Lisp_Object symbol; |
0a7f1fc0 | 1967 | int *modifier_end; |
284f4730 JB |
1968 | { |
1969 | struct Lisp_String *name; | |
1970 | int i; | |
1971 | int modifiers; | |
284f4730 JB |
1972 | |
1973 | CHECK_SYMBOL (symbol, 1); | |
1974 | ||
1975 | modifiers = 0; | |
1976 | name = XSYMBOL (symbol)->name; | |
1977 | ||
284f4730 | 1978 | |
0a7f1fc0 | 1979 | for (i = 0; i+2 <= name->size; ) |
284f4730 JB |
1980 | switch (name->data[i]) |
1981 | { | |
0a7f1fc0 JB |
1982 | #define SINGLE_LETTER_MOD(bit) \ |
1983 | if (name->data[i+1] != '-') \ | |
1984 | goto no_more_modifiers; \ | |
1985 | modifiers |= bit; \ | |
fce33686 | 1986 | i += 2; |
0a7f1fc0 JB |
1987 | |
1988 | case 'A': | |
1989 | SINGLE_LETTER_MOD (alt_modifier); | |
284f4730 JB |
1990 | break; |
1991 | ||
1992 | case 'C': | |
0a7f1fc0 | 1993 | SINGLE_LETTER_MOD (ctrl_modifier); |
fce33686 JB |
1994 | break; |
1995 | ||
1996 | case 'H': | |
0a7f1fc0 | 1997 | SINGLE_LETTER_MOD (hyper_modifier); |
fce33686 JB |
1998 | break; |
1999 | ||
2000 | case 'M': | |
0a7f1fc0 | 2001 | SINGLE_LETTER_MOD (meta_modifier); |
284f4730 JB |
2002 | break; |
2003 | ||
2004 | case 'S': | |
0a7f1fc0 | 2005 | SINGLE_LETTER_MOD (shift_modifier); |
fce33686 JB |
2006 | break; |
2007 | ||
2008 | case 's': | |
2009 | if (i + 6 > name->size | |
2010 | || strncmp (name->data + i, "super-", 6)) | |
2011 | goto no_more_modifiers; | |
fce33686 JB |
2012 | modifiers |= super_modifier; |
2013 | i += 6; | |
284f4730 JB |
2014 | break; |
2015 | ||
fce33686 JB |
2016 | case 'd': |
2017 | if (i + 5 > name->size) | |
2018 | goto no_more_modifiers; | |
2019 | if (! strncmp (name->data + i, "drag-", 5)) | |
2020 | { | |
fce33686 JB |
2021 | modifiers |= drag_modifier; |
2022 | i += 5; | |
2023 | } | |
2024 | else if (! strncmp (name->data + i, "down-", 5)) | |
2025 | { | |
fce33686 JB |
2026 | modifiers |= down_modifier; |
2027 | i += 5; | |
2028 | } | |
2029 | else | |
2030 | goto no_more_modifiers; | |
284f4730 JB |
2031 | break; |
2032 | ||
2033 | default: | |
2034 | goto no_more_modifiers; | |
0a7f1fc0 JB |
2035 | |
2036 | #undef SINGLE_LETTER_MOD | |
284f4730 JB |
2037 | } |
2038 | no_more_modifiers: | |
2039 | ||
0a7f1fc0 JB |
2040 | /* Should we include the `click' modifier? */ |
2041 | if (! (modifiers & (down_modifier | drag_modifier)) | |
2042 | && i + 7 == name->size | |
2043 | && strncmp (name->data + i, "mouse-", 6) | |
6569cc8d | 2044 | && ('0' <= name->data[i + 6] && name->data[i + 6] <= '9')) |
0a7f1fc0 JB |
2045 | modifiers |= click_modifier; |
2046 | ||
2047 | if (modifier_end) | |
2048 | *modifier_end = i; | |
2049 | ||
2050 | return modifiers; | |
2051 | } | |
2052 | ||
2053 | ||
2054 | /* Return a symbol whose name is the modifier prefixes for MODIFIERS | |
2055 | prepended to the string BASE[0..BASE_LEN-1]. | |
2056 | This doesn't use any caches. */ | |
2057 | static Lisp_Object | |
2058 | apply_modifiers_uncached (modifiers, base, base_len) | |
2059 | int modifiers; | |
2060 | char *base; | |
2061 | int base_len; | |
2062 | { | |
2063 | /* Since BASE could contain nulls, we can't use intern here; we have | |
2064 | to use Fintern, which expects a genuine Lisp_String, and keeps a | |
2065 | reference to it. */ | |
2066 | char *new_mods = | |
2067 | (char *) alloca (sizeof ("A-C-H-M-S-super-down-drag-")); | |
2068 | int mod_len; | |
284f4730 | 2069 | |
284f4730 | 2070 | { |
0a7f1fc0 JB |
2071 | char *p = new_mods; |
2072 | ||
2073 | /* Only the event queue may use the `up' modifier; it should always | |
2074 | be turned into a click or drag event before presented to lisp code. */ | |
2075 | if (modifiers & up_modifier) | |
2076 | abort (); | |
2077 | ||
2078 | if (modifiers & alt_modifier) { *p++ = 'A'; *p++ = '-'; } | |
2079 | if (modifiers & ctrl_modifier) { *p++ = 'C'; *p++ = '-'; } | |
2080 | if (modifiers & hyper_modifier) { *p++ = 'H'; *p++ = '-'; } | |
2081 | if (modifiers & meta_modifier) { *p++ = 'M'; *p++ = '-'; } | |
2082 | if (modifiers & shift_modifier) { *p++ = 'S'; *p++ = '-'; } | |
2083 | if (modifiers & super_modifier) { strcpy (p, "super-"); p += 6; } | |
2084 | if (modifiers & down_modifier) { strcpy (p, "down-"); p += 5; } | |
2085 | if (modifiers & drag_modifier) { strcpy (p, "drag-"); p += 5; } | |
2086 | /* The click modifier is denoted by the absence of other modifiers. */ | |
2087 | ||
2088 | *p = '\0'; | |
2089 | ||
2090 | mod_len = p - new_mods; | |
2091 | } | |
284f4730 | 2092 | |
0a7f1fc0 JB |
2093 | { |
2094 | Lisp_Object new_name = make_uninit_string (mod_len + base_len); | |
2095 | ||
2096 | bcopy (new_mods, XSTRING (new_name)->data, mod_len); | |
2097 | bcopy (base, XSTRING (new_name)->data + mod_len, base_len); | |
284f4730 JB |
2098 | |
2099 | return Fintern (new_name, Qnil); | |
2100 | } | |
2101 | } | |
2102 | ||
2103 | ||
0a7f1fc0 JB |
2104 | static char *modifier_names[] = |
2105 | { | |
2106 | "up", "alt", "control", "hyper", "meta", "shift", "super", "down", "drag", | |
2107 | "click" | |
2108 | }; | |
2109 | ||
2110 | static Lisp_Object modifier_symbols; | |
2111 | ||
2112 | /* Return the list of modifier symbols corresponding to the mask MODIFIERS. */ | |
2113 | static Lisp_Object | |
2114 | lispy_modifier_list (modifiers) | |
2115 | int modifiers; | |
2116 | { | |
2117 | Lisp_Object modifier_list; | |
2118 | int i; | |
2119 | ||
2120 | modifier_list = Qnil; | |
2121 | for (i = 0; (1<<i) <= modifiers; i++) | |
2122 | if (modifiers & (1<<i)) | |
2123 | modifier_list = Fcons (XVECTOR (modifier_symbols)->contents[i], | |
2124 | modifier_list); | |
2125 | ||
2126 | return modifier_list; | |
2127 | } | |
2128 | ||
2129 | ||
2130 | /* Parse the modifiers on SYMBOL, and return a list like (UNMODIFIED MASK), | |
2131 | where UNMODIFIED is the unmodified form of SYMBOL, | |
2132 | MASK is the set of modifiers present in SYMBOL's name. | |
2133 | This is similar to parse_modifiers_uncached, but uses the cache in | |
2134 | SYMBOL's Qevent_symbol_element_mask property, and maintains the | |
2135 | Qevent_symbol_elements property. */ | |
2136 | static Lisp_Object | |
2137 | parse_modifiers (symbol) | |
2138 | Lisp_Object symbol; | |
2139 | { | |
2140 | Lisp_Object elements = Fget (symbol, Qevent_symbol_element_mask); | |
2141 | ||
2142 | if (CONSP (elements)) | |
2143 | return elements; | |
2144 | else | |
2145 | { | |
2146 | int end; | |
2147 | int modifiers = parse_modifiers_uncached (symbol, &end); | |
2148 | Lisp_Object unmodified | |
2149 | = Fintern (make_string (XSYMBOL (symbol)->name->data + end, | |
2150 | XSYMBOL (symbol)->name->size - end), | |
2151 | Qnil); | |
2152 | Lisp_Object mask; | |
2153 | ||
2154 | XFASTINT (mask) = modifiers; | |
2155 | elements = Fcons (unmodified, Fcons (mask, Qnil)); | |
2156 | ||
2157 | /* Cache the parsing results on SYMBOL. */ | |
2158 | Fput (symbol, Qevent_symbol_element_mask, | |
2159 | elements); | |
2160 | Fput (symbol, Qevent_symbol_elements, | |
2161 | Fcons (unmodified, lispy_modifier_list (modifiers))); | |
2162 | ||
2163 | /* Since we know that SYMBOL is modifiers applied to unmodified, | |
2164 | it would be nice to put that in unmodified's cache. | |
2165 | But we can't, since we're not sure that parse_modifiers is | |
2166 | canonical. */ | |
2167 | ||
2168 | return elements; | |
2169 | } | |
2170 | } | |
2171 | ||
2172 | /* Apply the modifiers MODIFIERS to the symbol BASE. | |
2173 | BASE must be unmodified. | |
2174 | ||
2175 | This is like apply_modifiers_uncached, but uses BASE's | |
2176 | Qmodifier_cache property, if present. It also builds | |
cd21b839 JB |
2177 | Qevent_symbol_elements properties, since it has that info anyway. |
2178 | ||
2179 | apply_modifiers copies the value of BASE's Qevent_kind property to | |
2180 | the modified symbol. */ | |
0a7f1fc0 JB |
2181 | static Lisp_Object |
2182 | apply_modifiers (modifiers, base) | |
2183 | int modifiers; | |
2184 | Lisp_Object base; | |
2185 | { | |
2186 | Lisp_Object cache, index, entry; | |
2187 | ||
2188 | /* The click modifier never figures into cache indices. */ | |
0a7f1fc0 | 2189 | cache = Fget (base, Qmodifier_cache); |
cd21b839 | 2190 | XFASTINT (index) = (modifiers & ~click_modifier); |
0a7f1fc0 JB |
2191 | entry = Fassq (index, cache); |
2192 | ||
2193 | if (CONSP (entry)) | |
2194 | return XCONS (entry)->cdr; | |
2195 | ||
2196 | /* We have to create the symbol ourselves. */ | |
2197 | { | |
2198 | Lisp_Object new_symbol | |
2199 | = apply_modifiers_uncached (modifiers, | |
2200 | XSYMBOL (base)->name->data, | |
2201 | XSYMBOL (base)->name->size); | |
2202 | ||
2203 | /* Add the new symbol to the base's cache. */ | |
2204 | Fput (base, Qmodifier_cache, | |
2205 | Fcons (Fcons (index, new_symbol), cache)); | |
2206 | ||
2207 | /* We have the parsing info now for free, so add it to the caches. */ | |
2208 | XFASTINT (index) = modifiers; | |
2209 | Fput (new_symbol, Qevent_symbol_element_mask, | |
2210 | Fcons (base, Fcons (index, Qnil))); | |
2211 | Fput (new_symbol, Qevent_symbol_elements, | |
2212 | Fcons (base, lispy_modifier_list (modifiers))); | |
2213 | ||
cd21b839 JB |
2214 | /* This symbol is of the same kind as BASE. */ |
2215 | Fput (new_symbol, Qevent_kind, Fget (new_symbol, Qevent_kind)); | |
2216 | ||
0a7f1fc0 JB |
2217 | return new_symbol; |
2218 | } | |
2219 | } | |
2220 | ||
2221 | ||
2222 | /* Given a symbol whose name begins with modifiers ("C-", "M-", etc), | |
2223 | return a symbol with the modifiers placed in the canonical order. | |
2224 | Canonical order is alphabetical, except for down and drag, which | |
2225 | always come last. The 'click' modifier is never written out. | |
2226 | ||
2227 | Fdefine_key calls this to make sure that (for example) C-M-foo | |
2228 | and M-C-foo end up being equivalent in the keymap. */ | |
2229 | ||
2230 | Lisp_Object | |
2231 | reorder_modifiers (symbol) | |
2232 | Lisp_Object symbol; | |
2233 | { | |
2234 | /* It's hopefully okay to write the code this way, since everything | |
2235 | will soon be in caches, and no consing will be done at all. */ | |
2236 | Lisp_Object parsed = parse_modifiers (symbol); | |
2237 | ||
2238 | return apply_modifiers (XCONS (XCONS (parsed)->cdr)->car, | |
2239 | XCONS (parsed)->car); | |
2240 | } | |
2241 | ||
2242 | ||
284f4730 JB |
2243 | /* For handling events, we often want to produce a symbol whose name |
2244 | is a series of modifier key prefixes ("M-", "C-", etcetera) attached | |
2245 | to some base, like the name of a function key or mouse button. | |
2246 | modify_event_symbol produces symbols of this sort. | |
2247 | ||
2248 | NAME_TABLE should point to an array of strings, such that NAME_TABLE[i] | |
2249 | is the name of the i'th symbol. TABLE_SIZE is the number of elements | |
2250 | in the table. | |
2251 | ||
2252 | SYMBOL_TABLE should be a pointer to a Lisp_Object whose value will | |
2253 | persist between calls to modify_event_symbol that it can use to | |
2254 | store a cache of the symbols it's generated for this NAME_TABLE | |
2255 | before. | |
2256 | ||
2257 | SYMBOL_NUM is the number of the base name we want from NAME_TABLE. | |
2258 | ||
2259 | MODIFIERS is a set of modifier bits (as given in struct input_events) | |
2260 | whose prefixes should be applied to the symbol name. | |
2261 | ||
2262 | SYMBOL_KIND is the value to be placed in the event_kind property of | |
88cb0656 JB |
2263 | the returned symbol. |
2264 | ||
2265 | The symbols we create are supposed to have an | |
2266 | `event-symbol-elements' propery, which lists the modifiers present | |
2267 | in the symbol's name. */ | |
2268 | ||
284f4730 JB |
2269 | static Lisp_Object |
2270 | modify_event_symbol (symbol_num, modifiers, symbol_kind, name_table, | |
2271 | symbol_table, table_size) | |
2272 | int symbol_num; | |
2273 | unsigned modifiers; | |
2274 | Lisp_Object symbol_kind; | |
2275 | char **name_table; | |
2276 | Lisp_Object *symbol_table; | |
2277 | int table_size; | |
2278 | { | |
88cb0656 | 2279 | Lisp_Object *slot; |
284f4730 JB |
2280 | |
2281 | /* Is this a request for a valid symbol? */ | |
88cb0656 | 2282 | if (symbol_num < 0 || symbol_num >= table_size) |
284f4730 JB |
2283 | abort (); |
2284 | ||
0a7f1fc0 | 2285 | /* If *symbol_table doesn't seem to be initialized properly, fix that. |
88cb0656 | 2286 | *symbol_table should be a lisp vector TABLE_SIZE elements long, |
0a7f1fc0 | 2287 | where the Nth element is the symbol for NAME_TABLE[N]. */ |
284f4730 JB |
2288 | if (XTYPE (*symbol_table) != Lisp_Vector |
2289 | || XVECTOR (*symbol_table)->size != table_size) | |
88cb0656 | 2290 | { |
0a7f1fc0 JB |
2291 | Lisp_Object size; |
2292 | ||
2293 | XFASTINT (size) = table_size; | |
2294 | *symbol_table = Fmake_vector (size, Qnil); | |
88cb0656 | 2295 | } |
284f4730 | 2296 | |
88cb0656 | 2297 | slot = & XVECTOR (*symbol_table)->contents[symbol_num]; |
284f4730 | 2298 | |
0a7f1fc0 JB |
2299 | /* Have we already used this symbol before? */ |
2300 | if (NILP (*slot)) | |
284f4730 | 2301 | { |
0a7f1fc0 JB |
2302 | /* No; let's create it. */ |
2303 | *slot = intern (name_table[symbol_num]); | |
2304 | ||
2305 | /* Fill in the cache entries for this symbol; this also | |
2306 | builds the Qevent_symbol_elements property, which the user | |
2307 | cares about. */ | |
6569cc8d | 2308 | apply_modifiers (modifiers & click_modifier, *slot); |
0a7f1fc0 | 2309 | Fput (*slot, Qevent_kind, symbol_kind); |
284f4730 | 2310 | } |
88cb0656 | 2311 | |
0a7f1fc0 JB |
2312 | /* Apply modifiers to that symbol. */ |
2313 | return apply_modifiers (modifiers, *slot); | |
284f4730 | 2314 | } |
0a7f1fc0 | 2315 | |
284f4730 JB |
2316 | \f |
2317 | DEFUN ("mouse-click-p", Fmouse_click_p, Smouse_click_p, 1, 1, 0, | |
2318 | "Return non-nil iff OBJECT is a representation of a mouse event.\n\ | |
2319 | A mouse event is a list of five elements whose car is a symbol of the\n\ | |
2320 | form <MODIFIERS>mouse-<DIGIT>. I hope this is a temporary hack.") | |
2321 | (object) | |
2322 | Lisp_Object object; | |
2323 | { | |
2324 | if (EVENT_HAS_PARAMETERS (object) | |
2325 | && EQ (EVENT_HEAD_KIND (EVENT_HEAD (object)), | |
2326 | Qmouse_click)) | |
2327 | return Qt; | |
2328 | else | |
2329 | return Qnil; | |
2330 | } | |
2331 | \f | |
2332 | /* Store into *addr a value nonzero if terminal input chars are available. | |
2333 | Serves the purpose of ioctl (0, FIONREAD, addr) | |
2334 | but works even if FIONREAD does not exist. | |
2335 | (In fact, this may actually read some input.) */ | |
2336 | ||
2337 | static void | |
2338 | get_input_pending (addr) | |
2339 | int *addr; | |
2340 | { | |
2341 | /* First of all, have we already counted some input? */ | |
2342 | *addr = !NILP (Vquit_flag) || readable_events (); | |
2343 | ||
2344 | /* If input is being read as it arrives, and we have none, there is none. */ | |
2345 | if (*addr > 0 || (interrupt_input && ! interrupts_deferred)) | |
2346 | return; | |
2347 | ||
2348 | /* Try to read some input and see how much we get. */ | |
2349 | gobble_input (0); | |
2350 | *addr = !NILP (Vquit_flag) || readable_events (); | |
2351 | } | |
2352 | ||
2353 | /* Interface to read_avail_input, blocking SIGIO if necessary. */ | |
2354 | ||
2355 | int | |
2356 | gobble_input (expected) | |
2357 | int expected; | |
2358 | { | |
2359 | #ifndef VMS | |
2360 | #ifdef SIGIO | |
2361 | if (interrupt_input) | |
2362 | { | |
32676c08 | 2363 | SIGMASKTYPE mask; |
e065a56e | 2364 | mask = sigblockx (SIGIO); |
284f4730 | 2365 | read_avail_input (expected); |
e065a56e | 2366 | sigsetmask (mask); |
284f4730 JB |
2367 | } |
2368 | else | |
2369 | #endif | |
2370 | read_avail_input (expected); | |
2371 | #endif | |
2372 | } | |
2373 | \f | |
2374 | #ifndef VMS | |
2375 | ||
2376 | /* Read any terminal input already buffered up by the system | |
2377 | into the kbd_buffer, but do not wait. | |
2378 | ||
2379 | EXPECTED should be nonzero if the caller knows there is some input. | |
2380 | ||
2381 | Except on VMS, all input is read by this function. | |
2382 | If interrupt_input is nonzero, this function MUST be called | |
2383 | only when SIGIO is blocked. | |
2384 | ||
2385 | Returns the number of keyboard chars read, or -1 meaning | |
2386 | this is a bad time to try to read input. */ | |
2387 | ||
2388 | static int | |
2389 | read_avail_input (expected) | |
2390 | int expected; | |
2391 | { | |
2392 | struct input_event buf[KBD_BUFFER_SIZE]; | |
2393 | register int i; | |
2394 | int nread; | |
2395 | ||
2396 | if (read_socket_hook) | |
2397 | /* No need for FIONREAD or fcntl; just say don't wait. */ | |
2398 | nread = (*read_socket_hook) (0, buf, KBD_BUFFER_SIZE, expected, expected); | |
2399 | else | |
2400 | { | |
2401 | unsigned char cbuf[KBD_BUFFER_SIZE]; | |
2402 | ||
2403 | #ifdef FIONREAD | |
2404 | /* Find out how much input is available. */ | |
2405 | if (ioctl (0, FIONREAD, &nread) < 0) | |
2406 | /* Formerly simply reported no input, but that sometimes led to | |
2407 | a failure of Emacs to terminate. | |
2408 | SIGHUP seems appropriate if we can't reach the terminal. */ | |
2409 | kill (getpid (), SIGHUP); | |
2410 | if (nread == 0) | |
2411 | return 0; | |
2412 | if (nread > sizeof cbuf) | |
2413 | nread = sizeof cbuf; | |
2414 | #else /* no FIONREAD */ | |
2415 | #ifdef USG | |
2416 | /* Read some input if available, but don't wait. */ | |
2417 | nread = sizeof cbuf; | |
2418 | fcntl (fileno (stdin), F_SETFL, O_NDELAY); | |
2419 | #else | |
2420 | you lose; | |
2421 | #endif | |
2422 | #endif | |
2423 | ||
2424 | /* Now read; for one reason or another, this will not block. */ | |
2425 | while (1) | |
2426 | { | |
2427 | nread = read (fileno (stdin), cbuf, nread); | |
2428 | #ifdef AIX | |
2429 | /* The kernel sometimes fails to deliver SIGHUP for ptys. | |
2430 | This looks incorrect, but it isn't, because _BSD causes | |
2431 | O_NDELAY to be defined in fcntl.h as O_NONBLOCK, | |
2432 | and that causes a value other than 0 when there is no input. */ | |
2433 | if (nread == 0) | |
2434 | kill (SIGHUP, 0); | |
2435 | #endif | |
2436 | /* Retry the read if it is interrupted. */ | |
2437 | if (nread >= 0 | |
2438 | || ! (errno == EAGAIN || errno == EFAULT | |
2439 | #ifdef EBADSLT | |
2440 | || errno == EBADSLT | |
2441 | #endif | |
2442 | )) | |
2443 | break; | |
2444 | } | |
2445 | ||
2446 | #ifndef FIONREAD | |
2447 | #ifdef USG | |
2448 | fcntl (fileno (stdin), F_SETFL, 0); | |
2449 | #endif /* USG */ | |
2450 | #endif /* no FIONREAD */ | |
2451 | for (i = 0; i < nread; i++) | |
2452 | { | |
2453 | buf[i].kind = ascii_keystroke; | |
2454 | XSET (buf[i].code, Lisp_Int, cbuf[i]); | |
ff11dfa1 | 2455 | buf[i].frame = selected_frame; |
284f4730 JB |
2456 | } |
2457 | } | |
2458 | ||
2459 | /* Scan the chars for C-g and store them in kbd_buffer. */ | |
2460 | for (i = 0; i < nread; i++) | |
2461 | { | |
2462 | kbd_buffer_store_event (&buf[i]); | |
2463 | /* Don't look at input that follows a C-g too closely. | |
2464 | This reduces lossage due to autorepeat on C-g. */ | |
2465 | if (buf[i].kind == ascii_keystroke | |
2466 | && XINT(buf[i].code) == quit_char) | |
2467 | break; | |
2468 | } | |
2469 | ||
2470 | return nread; | |
2471 | } | |
2472 | #endif /* not VMS */ | |
2473 | \f | |
2474 | #ifdef SIGIO /* for entire page */ | |
2475 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
2476 | ||
2ce30ea2 | 2477 | SIGTYPE |
284f4730 JB |
2478 | input_available_signal (signo) |
2479 | int signo; | |
2480 | { | |
2481 | /* Must preserve main program's value of errno. */ | |
2482 | int old_errno = errno; | |
2483 | #ifdef BSD4_1 | |
2484 | extern int select_alarmed; | |
2485 | #endif | |
2486 | ||
2487 | #ifdef USG | |
2488 | /* USG systems forget handlers when they are used; | |
2489 | must reestablish each time */ | |
2490 | signal (signo, input_available_signal); | |
2491 | #endif /* USG */ | |
2492 | ||
2493 | #ifdef BSD4_1 | |
2494 | sigisheld (SIGIO); | |
2495 | #endif | |
2496 | ||
ffd56f97 JB |
2497 | if (input_available_clear_time) |
2498 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
284f4730 JB |
2499 | |
2500 | while (1) | |
2501 | { | |
2502 | int nread; | |
2503 | nread = read_avail_input (1); | |
2504 | /* -1 means it's not ok to read the input now. | |
2505 | UNBLOCK_INPUT will read it later; now, avoid infinite loop. | |
2506 | 0 means there was no keyboard input available. */ | |
2507 | if (nread <= 0) | |
2508 | break; | |
2509 | ||
2510 | #ifdef BSD4_1 | |
2511 | select_alarmed = 1; /* Force the select emulator back to life */ | |
2512 | #endif | |
2513 | } | |
2514 | ||
2515 | #ifdef BSD4_1 | |
2516 | sigfree (); | |
2517 | #endif | |
2518 | errno = old_errno; | |
2519 | } | |
2520 | #endif /* SIGIO */ | |
2521 | \f | |
2522 | /* Return the prompt-string of a sparse keymap. | |
2523 | This is the first element which is a string. | |
2524 | Return nil if there is none. */ | |
2525 | ||
2526 | Lisp_Object | |
2527 | map_prompt (map) | |
2528 | Lisp_Object map; | |
2529 | { | |
2530 | while (CONSP (map)) | |
2531 | { | |
2532 | register Lisp_Object tem; | |
2533 | tem = Fcar (map); | |
2534 | if (XTYPE (tem) == Lisp_String) | |
2535 | return tem; | |
2536 | map = Fcdr (map); | |
2537 | } | |
2538 | return Qnil; | |
2539 | } | |
2540 | ||
2541 | static int echo_flag; | |
2542 | static int echo_now; | |
2543 | ||
2544 | /* Read a character like read_char but optionally prompt based on maps | |
7d6de002 RS |
2545 | in the array MAPS. NMAPS is the length of MAPS. |
2546 | ||
2547 | PREV_EVENT is the previous input event, or nil if we are reading | |
2548 | the first event of a key sequence. | |
2549 | ||
6569cc8d JB |
2550 | If USED_MOUSE_MENU is non-zero, then we set *USED_MOUSE_MENU to 1 |
2551 | if we used a mouse menu to read the input, or zero otherwise. If | |
2552 | USED_MOUSE_MENU is zero, *USED_MOUSE_MENU is left alone. | |
284f4730 JB |
2553 | |
2554 | The prompting is done based on the prompt-string of the map | |
2555 | and the strings associated with various map elements. */ | |
2556 | ||
2557 | Lisp_Object | |
7d6de002 RS |
2558 | read_char_menu_prompt (nmaps, maps, prev_event, used_mouse_menu) |
2559 | int nmaps; | |
2560 | Lisp_Object *maps; | |
2561 | Lisp_Object prev_event; | |
2562 | int *used_mouse_menu; | |
284f4730 | 2563 | { |
7d6de002 RS |
2564 | int mapno; |
2565 | register Lisp_Object name; | |
284f4730 | 2566 | int nlength; |
ff11dfa1 | 2567 | int width = FRAME_WIDTH (selected_frame) - 4; |
7d6de002 RS |
2568 | char *menu = (char *) alloca (width + 4); |
2569 | int idx = -1; | |
2570 | Lisp_Object rest, vector; | |
2571 | ||
6569cc8d JB |
2572 | if (used_mouse_menu) |
2573 | *used_mouse_menu = 0; | |
284f4730 JB |
2574 | |
2575 | /* Use local over global Menu maps */ | |
2576 | ||
7d6de002 RS |
2577 | if (! menu_prompting) |
2578 | return Qnil; | |
2579 | ||
2580 | /* Get the menu name from the first map that has one (a prompt string). */ | |
2581 | for (mapno = 0; mapno < nmaps; mapno++) | |
2582 | { | |
2583 | name = map_prompt (maps[mapno]); | |
2584 | if (!NILP (name)) | |
2585 | break; | |
2586 | } | |
284f4730 | 2587 | |
7d6de002 | 2588 | /* If we don't have any menus, just read a character normally. */ |
284f4730 | 2589 | if (NILP (name)) |
7d6de002 RS |
2590 | return Qnil; |
2591 | ||
72cea080 RS |
2592 | #ifdef HAVE_X_WINDOW |
2593 | #ifndef NO_X_MENU | |
7d6de002 RS |
2594 | /* If we got to this point via a mouse click, |
2595 | use a real menu for mouse selection. */ | |
2596 | if (XTYPE (prev_event) == Lisp_Cons) | |
2597 | { | |
2598 | /* Display the menu and get the selection. */ | |
2599 | Lisp_Object *realmaps | |
2600 | = (Lisp_Object *) alloca (nmaps * sizeof (Lisp_Object)); | |
2601 | Lisp_Object value; | |
2602 | int nmaps1 = 0; | |
2603 | ||
2604 | /* Use the maps that are not nil. */ | |
2605 | for (mapno = 0; mapno < nmaps; mapno++) | |
2606 | if (!NILP (maps[mapno])) | |
2607 | realmaps[nmaps1++] = maps[mapno]; | |
2608 | ||
2609 | value = Fx_popup_menu (prev_event, Flist (nmaps1, realmaps)); | |
2610 | if (NILP (value)) | |
2611 | XSET (value, Lisp_Int, quit_char); | |
6569cc8d JB |
2612 | if (used_mouse_menu) |
2613 | *used_mouse_menu = 1; | |
7d6de002 RS |
2614 | return value; |
2615 | } | |
72cea080 RS |
2616 | #endif /* not NO_X_MENU */ |
2617 | #endif /* HAVE_X_WINDOW */ | |
284f4730 JB |
2618 | |
2619 | /* Prompt string always starts with map's prompt, and a space. */ | |
2620 | strcpy (menu, XSTRING (name)->data); | |
2621 | nlength = XSTRING (name)->size; | |
7d6de002 | 2622 | menu[nlength++] = ':'; |
284f4730 JB |
2623 | menu[nlength++] = ' '; |
2624 | menu[nlength] = 0; | |
2625 | ||
7d6de002 RS |
2626 | /* Start prompting at start of first map. */ |
2627 | mapno = 0; | |
2628 | rest = maps[mapno]; | |
284f4730 JB |
2629 | |
2630 | /* Present the documented bindings, a line at a time. */ | |
2631 | while (1) | |
2632 | { | |
2633 | int notfirst = 0; | |
2634 | int i = nlength; | |
2635 | Lisp_Object obj; | |
2636 | int ch; | |
2637 | ||
284f4730 | 2638 | /* Loop over elements of map. */ |
7d6de002 | 2639 | while (i < width) |
284f4730 | 2640 | { |
7d6de002 | 2641 | Lisp_Object s, elt; |
284f4730 | 2642 | |
7d6de002 RS |
2643 | /* If reached end of map, start at beginning of next map. */ |
2644 | if (NILP (rest)) | |
2645 | { | |
2646 | mapno++; | |
2647 | /* At end of last map, wrap around to first map if just starting, | |
2648 | or end this line if already have something on it. */ | |
2649 | if (mapno == nmaps) | |
284f4730 | 2650 | { |
7d6de002 RS |
2651 | if (notfirst) |
2652 | break; | |
2653 | else | |
2654 | mapno = 0; | |
284f4730 | 2655 | } |
7d6de002 | 2656 | rest = maps[mapno]; |
284f4730 | 2657 | } |
7d6de002 RS |
2658 | |
2659 | /* Look at the next element of the map. */ | |
2660 | if (idx >= 0) | |
2661 | elt = XVECTOR (vector)->contents[idx]; | |
284f4730 | 2662 | else |
7d6de002 RS |
2663 | elt = Fcar_safe (rest); |
2664 | ||
2665 | if (idx < 0 && XTYPE (elt) == Lisp_Vector) | |
284f4730 | 2666 | { |
7d6de002 RS |
2667 | /* If we found a dense table in the keymap, |
2668 | advanced past it, but start scanning its contents. */ | |
2669 | rest = Fcdr_safe (rest); | |
2670 | vector = elt; | |
2671 | idx = 0; | |
284f4730 | 2672 | } |
7d6de002 RS |
2673 | else |
2674 | { | |
2675 | /* An ordinary element. */ | |
2676 | s = Fcar_safe (Fcdr_safe (elt)); | |
2677 | if (XTYPE (s) != Lisp_String) | |
2678 | /* Ignore the element if it has no prompt string. */ | |
2679 | ; | |
2680 | /* If we have room for the prompt string, add it to this line. | |
2681 | If this is the first on the line, always add it. */ | |
2682 | else if (XSTRING (s)->size + i < width | |
2683 | || !notfirst) | |
2684 | { | |
2685 | int thiswidth; | |
284f4730 | 2686 | |
7d6de002 RS |
2687 | /* Punctuate between strings. */ |
2688 | if (notfirst) | |
2689 | { | |
2690 | strcpy (menu + i, ", "); | |
2691 | i += 2; | |
2692 | } | |
2693 | notfirst = 1; | |
2694 | ||
2695 | /* Add as much of string as fits. */ | |
2696 | thiswidth = XSTRING (s)->size; | |
2697 | if (thiswidth + i > width) | |
2698 | thiswidth = width - i; | |
2699 | bcopy (XSTRING (s)->data, menu + i, thiswidth); | |
2700 | i += thiswidth; | |
2701 | } | |
2702 | else | |
2703 | { | |
2704 | /* If this element does not fit, end the line now, | |
2705 | and save the element for the next line. */ | |
2706 | strcpy (menu + i, "..."); | |
2707 | break; | |
2708 | } | |
2709 | ||
2710 | /* Move past this element. */ | |
2711 | if (idx >= 0 && idx + 1 >= XVECTOR (rest)->size) | |
2712 | /* Handle reaching end of dense table. */ | |
2713 | idx = -1; | |
2714 | if (idx >= 0) | |
2715 | idx++; | |
2716 | else | |
2717 | rest = Fcdr_safe (rest); | |
2718 | } | |
284f4730 JB |
2719 | } |
2720 | ||
2721 | /* Prompt with that and read response. */ | |
2722 | message1 (menu); | |
7d6de002 | 2723 | obj = read_char (1, 0, 0, Qnil, 0); |
284f4730 JB |
2724 | |
2725 | if (XTYPE (obj) != Lisp_Int) | |
2726 | return obj; | |
2727 | else | |
2728 | ch = XINT (obj); | |
2729 | ||
2730 | if (obj != menu_prompt_more_char | |
2731 | && (XTYPE (menu_prompt_more_char) != Lisp_Int | |
2732 | || obj != make_number (Ctl (XINT (menu_prompt_more_char))))) | |
2733 | return obj; | |
2734 | } | |
2735 | } | |
284f4730 JB |
2736 | \f |
2737 | /* Reading key sequences. */ | |
2738 | ||
2739 | /* Follow KEY in the maps in CURRENT[0..NMAPS-1], placing its bindings | |
2740 | in DEFS[0..NMAPS-1]. Set NEXT[i] to DEFS[i] if DEFS[i] is a | |
2741 | keymap, or nil otherwise. Return the index of the first keymap in | |
2742 | which KEY has any binding, or NMAPS if no map has a binding. | |
2743 | ||
2744 | If KEY is a meta ASCII character, treat it like meta-prefix-char | |
2745 | followed by the corresponding non-meta character. Keymaps in | |
2746 | CURRENT with non-prefix bindings for meta-prefix-char become nil in | |
2747 | NEXT. | |
2748 | ||
2749 | When KEY is not defined in any of the keymaps, if it is an upper | |
2750 | case letter and there are bindings for the corresponding lower-case | |
2751 | letter, return the bindings for the lower-case letter. | |
2752 | ||
88cb0656 JB |
2753 | If KEY has no bindings in any of the CURRENT maps, NEXT is left |
2754 | unmodified. | |
2755 | ||
284f4730 JB |
2756 | NEXT may == CURRENT. */ |
2757 | ||
2758 | static int | |
2759 | follow_key (key, nmaps, current, defs, next) | |
2760 | Lisp_Object key; | |
2761 | Lisp_Object *current, *defs, *next; | |
2762 | int nmaps; | |
2763 | { | |
2764 | int i, first_binding; | |
2765 | ||
2766 | /* If KEY is a meta ASCII character, treat it like meta-prefix-char | |
2767 | followed by the corresponding non-meta character. */ | |
2768 | if (XTYPE (key) == Lisp_Int | |
2769 | && XINT (key) >= 0200) | |
2770 | { | |
2771 | for (i = 0; i < nmaps; i++) | |
2772 | if (! NILP (current[i])) | |
2773 | { | |
cd21b839 JB |
2774 | next[i] = |
2775 | get_keyelt (access_keymap (current[i], meta_prefix_char, 1)); | |
284f4730 JB |
2776 | |
2777 | /* Note that since we pass the resulting bindings through | |
2778 | get_keymap_1, non-prefix bindings for meta-prefix-char | |
2779 | disappear. */ | |
2780 | next[i] = get_keymap_1 (next[i], 0); | |
2781 | } | |
2782 | else | |
2783 | next[i] = Qnil; | |
2784 | ||
2785 | current = next; | |
2786 | XSET (key, Lisp_Int, XFASTINT (key) & 0177); | |
2787 | } | |
2788 | ||
2789 | first_binding = nmaps; | |
2790 | for (i = nmaps - 1; i >= 0; i--) | |
2791 | { | |
2792 | if (! NILP (current[i])) | |
2793 | { | |
cd21b839 | 2794 | defs[i] = get_keyelt (access_keymap (current[i], key, 1)); |
284f4730 JB |
2795 | if (! NILP (defs[i])) |
2796 | first_binding = i; | |
2797 | } | |
2798 | else | |
2799 | defs[i] = Qnil; | |
2800 | } | |
2801 | ||
2802 | /* When KEY is not defined in any of the keymaps, if it is an upper | |
2803 | case letter and there are bindings for the corresponding | |
2804 | lower-case letter, return the bindings for the lower-case letter. */ | |
2805 | if (first_binding == nmaps | |
2806 | && XTYPE (key) == Lisp_Int | |
2807 | && UPPERCASEP (XINT (key))) | |
2808 | { | |
2809 | XSETINT (key, DOWNCASE (XINT (key))); | |
2810 | ||
2811 | first_binding = nmaps; | |
2812 | for (i = nmaps - 1; i >= 0; i--) | |
2813 | { | |
2814 | if (! NILP (current[i])) | |
2815 | { | |
cd21b839 | 2816 | defs[i] = get_keyelt (access_keymap (current[i], key, 1)); |
284f4730 JB |
2817 | if (! NILP (defs[i])) |
2818 | first_binding = i; | |
2819 | } | |
2820 | else | |
2821 | defs[i] = Qnil; | |
2822 | } | |
2823 | } | |
2824 | ||
2825 | /* Given the set of bindings we've found, produce the next set of maps. */ | |
0a7f1fc0 JB |
2826 | if (first_binding < nmaps) |
2827 | for (i = 0; i < nmaps; i++) | |
2828 | next[i] = NILP (defs[i]) ? Qnil : get_keymap_1 (defs[i], 0); | |
284f4730 JB |
2829 | |
2830 | return first_binding; | |
2831 | } | |
2832 | ||
2833 | /* Read a sequence of keys that ends with a non prefix character | |
2834 | according to the keymaps in KEYMAPS[0..nmaps-1]. Keymaps appearing | |
2835 | earlier in KEYMAPS take precidence over those appearing later. | |
2836 | ||
2837 | Store the sequence in KEYBUF, a buffer of size BUFSIZE. Prompt | |
2838 | with PROMPT. Echo starting immediately unless `prompt' is 0. | |
2839 | Return the length of the key sequence stored. | |
2840 | ||
ff11dfa1 | 2841 | If the user switches frames in the midst of a key sequence, we |
284f4730 JB |
2842 | throw away any prefix we have read so far, and start afresh. For |
2843 | mouse clicks, we look up the click in the keymap of the buffer | |
2844 | clicked on, throwing away any prefix if it is not the same buffer | |
2845 | we used to be reading from. */ | |
2846 | ||
2847 | static int | |
2848 | read_key_sequence (keybuf, bufsize, prompt) | |
2849 | Lisp_Object *keybuf; | |
2850 | int bufsize; | |
2851 | Lisp_Object prompt; | |
2852 | { | |
2853 | /* How many keys there are in the current key sequence. */ | |
2854 | int t; | |
2855 | ||
2856 | /* The buffer that the most recently read event was typed at. This | |
2857 | helps us read mouse clicks according to the buffer clicked in, | |
ff11dfa1 | 2858 | and notice when the mouse has moved from one frame to another. */ |
284f4730 JB |
2859 | struct buffer *last_event_buffer = current_buffer; |
2860 | ||
2861 | /* The length of the echo buffer when we started reading, and | |
2862 | the length of this_command_keys when we started reading. */ | |
2863 | int echo_start; | |
2864 | int keys_start = this_command_key_count; | |
2865 | ||
2866 | /* The number of keymaps we're scanning right now, and the number of | |
2867 | keymaps we have allocated space for. */ | |
2868 | int nmaps; | |
2869 | int nmaps_allocated = 0; | |
2870 | ||
253598e4 | 2871 | /* submaps[0..nmaps-1] are the prefix definitions of KEYBUF[0..t-1] |
284f4730 | 2872 | in the current keymaps, or nil where it is not a prefix. */ |
253598e4 | 2873 | Lisp_Object *submaps; |
284f4730 JB |
2874 | |
2875 | /* defs[0..nmaps-1] are the definitions of KEYBUF[0..t-1] in | |
2876 | the current keymaps. */ | |
2877 | Lisp_Object *defs; | |
2878 | ||
253598e4 JB |
2879 | /* The index of the first keymap that has a binding for this key |
2880 | sequence. In other words, the lowest i such that defs[i] is | |
2881 | non-nil.*/ | |
284f4730 JB |
2882 | int first_binding; |
2883 | ||
2884 | /* If mock_input > t, then KEYBUF[t] should be read as the next | |
253598e4 JB |
2885 | input key. |
2886 | ||
2887 | We use this to recover after recognizing a function key. Once we | |
2888 | realize that a suffix of the current key sequence is actually a | |
2889 | function key's escape sequence, we replace the suffix with the | |
2890 | function key's binding from Vfunction_key_map. Now keybuf | |
2891 | contains a new and different key sequence, so the echo area and | |
2892 | the submaps and defs arrays are wrong. In this situation, we set | |
2893 | mock_input to t, set t to 0, and jump to restart; the loop will | |
2894 | read keys from keybuf up until mock_input, which rebuilds the | |
2895 | state, and then it will resume reading characters from the keyboard. */ | |
284f4730 JB |
2896 | int mock_input = 0; |
2897 | ||
253598e4 JB |
2898 | /* If the sequence is unbound in submaps[], then |
2899 | keymap[fkey_start..fkey_end-1] is a prefix in Vfunction_key_map, | |
2900 | and fkey_map is its binding. If mock_input is in use, these | |
2901 | might be > t, indicating that all function key scanning should | |
284f4730 | 2902 | hold off until t reaches them. */ |
253598e4 | 2903 | |
284f4730 JB |
2904 | int fkey_start = 0, fkey_end = 0; |
2905 | Lisp_Object fkey_map = Vfunction_key_map; | |
2906 | ||
cd21b839 JB |
2907 | /* If we receive a ``switch-frame'' event in the middle of a key sequence, |
2908 | we put it off for later. While we're reading, we keep the event here. */ | |
2909 | Lisp_Object delayed_switch_frame = Qnil; | |
2910 | ||
7d6de002 RS |
2911 | last_nonmenu_event = Qnil; |
2912 | ||
284f4730 JB |
2913 | if (INTERACTIVE) |
2914 | { | |
2915 | if (prompt) | |
2916 | echo_prompt (prompt); | |
2917 | else if (cursor_in_echo_area) | |
2918 | /* This doesn't put in a dash if the echo buffer is empty, so | |
2919 | you don't always see a dash hanging out in the minibuffer. */ | |
2920 | echo_dash (); | |
2921 | echo_start = echo_length (); | |
2922 | } | |
2923 | ||
253598e4 | 2924 | /* If there is no function key map, turn off function key scanning. */ |
284f4730 JB |
2925 | if (NILP (Fkeymapp (Vfunction_key_map))) |
2926 | fkey_start = fkey_end = bufsize + 1; | |
2927 | ||
2928 | restart: | |
2929 | t = 0; | |
2930 | this_command_key_count = keys_start; | |
2931 | ||
0a7f1fc0 JB |
2932 | /* This is a no-op the first time through, but if we restart, it |
2933 | reverts the echo area to its original state. */ | |
2934 | if (INTERACTIVE) | |
2935 | echo_truncate (echo_start); | |
2936 | ||
284f4730 JB |
2937 | { |
2938 | Lisp_Object *maps; | |
2939 | ||
2940 | nmaps = current_minor_maps (0, &maps) + 2; | |
2941 | if (nmaps > nmaps_allocated) | |
2942 | { | |
253598e4 | 2943 | submaps = (Lisp_Object *) alloca (nmaps * sizeof (submaps[0])); |
284f4730 JB |
2944 | defs = (Lisp_Object *) alloca (nmaps * sizeof (defs[0])); |
2945 | nmaps_allocated = nmaps; | |
2946 | } | |
253598e4 JB |
2947 | bcopy (maps, submaps, (nmaps - 2) * sizeof (submaps[0])); |
2948 | submaps[nmaps-2] = last_event_buffer->keymap; | |
2949 | submaps[nmaps-1] = global_map; | |
284f4730 JB |
2950 | } |
2951 | ||
2952 | /* Find an accurate initial value for first_binding. */ | |
2953 | for (first_binding = 0; first_binding < nmaps; first_binding++) | |
253598e4 | 2954 | if (! NILP (submaps[first_binding])) |
284f4730 JB |
2955 | break; |
2956 | ||
253598e4 | 2957 | while ((first_binding < nmaps && ! NILP (submaps[first_binding])) |
284f4730 JB |
2958 | || (first_binding >= nmaps && fkey_start < t)) |
2959 | { | |
2960 | Lisp_Object key; | |
7d6de002 | 2961 | int used_mouse_menu = 0; |
284f4730 | 2962 | |
0a7f1fc0 JB |
2963 | /* These variables are analogous to echo_start and keys_start; |
2964 | while those allow us to restart the entire key sequence, | |
2965 | echo_local_start and keys_local_start allow us to throw away | |
2966 | just one key. */ | |
2967 | int echo_local_start = echo_length (); | |
2968 | int keys_local_start = this_command_key_count; | |
2969 | int local_first_binding = first_binding; | |
2970 | ||
284f4730 JB |
2971 | if (t >= bufsize) |
2972 | error ("key sequence too long"); | |
2973 | ||
0a7f1fc0 JB |
2974 | retry_key: |
2975 | /* These are no-ops, unless we throw away a keystroke below and | |
2976 | jumped back up to retry_key; in that case, these restore these | |
2977 | variables to their original state, allowing us to restart the | |
2978 | loop. */ | |
2979 | echo_truncate (echo_local_start); | |
2980 | this_command_key_count = keys_local_start; | |
2981 | first_binding = local_first_binding; | |
2982 | ||
253598e4 | 2983 | /* Are we re-reading a key sequence, as indicated by mock_input? */ |
284f4730 JB |
2984 | if (t < mock_input) |
2985 | { | |
2986 | key = keybuf[t]; | |
2987 | add_command_key (key); | |
2988 | echo_char (key); | |
2989 | } | |
253598e4 JB |
2990 | |
2991 | /* If not, we should actually read a character. */ | |
284f4730 JB |
2992 | else |
2993 | { | |
2994 | struct buffer *buf; | |
2995 | ||
7d6de002 RS |
2996 | key = read_char (!prompt, nmaps, submaps, last_nonmenu_event, |
2997 | &used_mouse_menu); | |
284f4730 JB |
2998 | |
2999 | /* The above routines return -1 at the end of a macro. | |
3000 | Emacs 18 handles this by returning immediately with a | |
3001 | zero, so that's what we'll do. */ | |
3002 | if (XTYPE (key) == Lisp_Int && XINT (key) < 0) | |
cd21b839 JB |
3003 | { |
3004 | unread_switch_frame = delayed_switch_frame; | |
3005 | return 0; | |
3006 | } | |
284f4730 JB |
3007 | |
3008 | Vquit_flag = Qnil; | |
3009 | ||
0a7f1fc0 JB |
3010 | /* Clicks in non-text areas get prefixed by the symbol |
3011 | in their CHAR-ADDRESS field. For example, a click on | |
3012 | the mode line is prefixed by the symbol `mode-line'. */ | |
cd21b839 | 3013 | if (EVENT_HAS_PARAMETERS (key)) |
0a7f1fc0 | 3014 | { |
cd21b839 JB |
3015 | Lisp_Object kind = EVENT_HEAD_KIND (EVENT_HEAD (key)); |
3016 | if (EQ (kind, Qmouse_click)) | |
0a7f1fc0 | 3017 | { |
cd21b839 | 3018 | Lisp_Object posn = POSN_BUFFER_POSN (EVENT_START (key)); |
0a7f1fc0 | 3019 | |
cd21b839 JB |
3020 | if (XTYPE (posn) == Lisp_Symbol) |
3021 | { | |
3022 | if (t + 1 >= bufsize) | |
3023 | error ("key sequence too long"); | |
3024 | keybuf[t] = posn; | |
3025 | keybuf[t+1] = key; | |
3026 | mock_input = t + 2; | |
3027 | ||
3028 | goto retry_key; | |
3029 | } | |
3030 | } | |
3031 | else if (EQ (kind, Qswitch_frame)) | |
3032 | { | |
3033 | /* If we're at the beginning of a key sequence, go | |
3034 | ahead and return this event. If we're in the | |
3035 | midst of a key sequence, delay it until the end. */ | |
3036 | if (t > 0) | |
3037 | { | |
3038 | delayed_switch_frame = key; | |
3039 | goto retry_key; | |
3040 | } | |
0a7f1fc0 JB |
3041 | } |
3042 | } | |
3043 | ||
cd21b839 JB |
3044 | #if 0 /* This shouldn't be necessary any more, now that we have |
3045 | switch-frame events. */ | |
ff11dfa1 | 3046 | #ifdef MULTI_FRAME |
284f4730 | 3047 | /* What buffer was this event typed/moused at? */ |
7d6de002 RS |
3048 | if (used_mouse_menu) |
3049 | /* Never change last_event_buffer for using a menu. */ | |
3050 | buf = last_event_buffer; | |
3051 | else if (XTYPE (key) == Lisp_Int || XTYPE (key) == Lisp_Symbol) | |
fce33686 JB |
3052 | { |
3053 | buf = ((XTYPE (Vlast_event_frame) == Lisp_Frame) | |
3054 | ? (XBUFFER | |
3055 | (XWINDOW | |
3056 | (FRAME_SELECTED_WINDOW | |
3057 | (XFRAME (Vlast_event_frame)))->buffer)) | |
3058 | : last_event_buffer); | |
3059 | } | |
284f4730 JB |
3060 | else if (EVENT_HAS_PARAMETERS (key)) |
3061 | { | |
88cb0656 | 3062 | Lisp_Object window = POSN_WINDOW (EVENT_START (key)); |
284f4730 JB |
3063 | |
3064 | if (NILP (window)) | |
3065 | abort (); | |
3066 | ||
3067 | buf = XBUFFER (XWINDOW (window)->buffer); | |
3068 | } | |
3069 | else | |
3070 | abort (); | |
3071 | ||
3072 | /* If this event came to a different buffer than the one | |
3073 | we're currently in, switch buffers and start a new key | |
3074 | sequence, starting with key. */ | |
3075 | if (buf != last_event_buffer) | |
3076 | { | |
3077 | last_event_buffer = buf; | |
ff11dfa1 | 3078 | Fselect_frame (Vlast_event_frame, Qnil); |
284f4730 JB |
3079 | |
3080 | /* Arrange to read key as the next event. */ | |
3081 | keybuf[0] = key; | |
3082 | mock_input = 1; | |
3083 | ||
284f4730 JB |
3084 | goto restart; |
3085 | } | |
cd21b839 JB |
3086 | #endif /* MULTI_FRAME */ |
3087 | #endif /* 0 */ | |
284f4730 | 3088 | } |
0a7f1fc0 | 3089 | |
284f4730 JB |
3090 | first_binding = (follow_key (key, |
3091 | nmaps - first_binding, | |
253598e4 | 3092 | submaps + first_binding, |
284f4730 | 3093 | defs + first_binding, |
253598e4 | 3094 | submaps + first_binding) |
284f4730 | 3095 | + first_binding); |
0a7f1fc0 JB |
3096 | |
3097 | /* If this key wasn't bound, we'll try some fallbacks. */ | |
3098 | if (first_binding >= nmaps) | |
3099 | { | |
3100 | Lisp_Object head = EVENT_HEAD (key); | |
3101 | ||
3102 | if (XTYPE (head) == Lisp_Symbol) | |
3103 | { | |
3104 | Lisp_Object breakdown = parse_modifiers (head); | |
3105 | Lisp_Object modifiers = | |
3106 | XINT (XCONS (XCONS (breakdown)->cdr)->car); | |
3107 | ||
3108 | /* We drop unbound `down-' events altogether. */ | |
3109 | if (modifiers & down_modifier) | |
3110 | { | |
3111 | /* Adding prefixes for non-textual mouse clicks creates | |
3112 | two characters of mock input, and this can't be the | |
3113 | first, so it's okay to clear mock_input in that case. | |
3114 | Only function key expansion could create more than | |
3115 | two keys, but that should never generate mouse events, | |
3116 | so it's okay to nuke mock_input in that case too. | |
3117 | Isn't this just the most wonderful code ever? */ | |
3118 | mock_input = 0; | |
3119 | goto retry_key; | |
3120 | } | |
3121 | ||
3122 | /* We turn unbound `drag-' events into `click-' | |
3123 | events, if the click would be bound. */ | |
3124 | else if (modifiers & drag_modifier) | |
3125 | { | |
3126 | Lisp_Object new_head = | |
3127 | apply_modifiers (modifiers & ~drag_modifier, | |
3128 | XCONS (breakdown)->car); | |
3129 | Lisp_Object new_click = | |
3130 | Fcons (new_head, Fcons (EVENT_START (key), Qnil)); | |
3131 | ||
3132 | /* Look for a binding for this new key. follow_key | |
3133 | promises that it didn't munge submaps the | |
3134 | last time we called it, since key was unbound. */ | |
3135 | first_binding = | |
3136 | (follow_key (new_click, | |
3137 | nmaps - local_first_binding, | |
3138 | submaps + local_first_binding, | |
3139 | defs + local_first_binding, | |
3140 | submaps + local_first_binding) | |
3141 | + local_first_binding); | |
3142 | ||
3143 | /* If that click is bound, go for it. */ | |
3144 | if (first_binding < nmaps) | |
3145 | key = new_click; | |
3146 | /* Otherwise, we'll leave key set to the drag event. */ | |
3147 | } | |
3148 | } | |
3149 | } | |
3150 | ||
284f4730 | 3151 | keybuf[t++] = key; |
7d6de002 RS |
3152 | /* Normally, last_nonmenu_event gets the previous key we read. |
3153 | But when a mouse popup menu is being used, | |
3154 | we don't update last_nonmenu_event; it continues to hold the mouse | |
3155 | event that preceded the first level of menu. */ | |
3156 | if (!used_mouse_menu) | |
3157 | last_nonmenu_event = key; | |
284f4730 JB |
3158 | |
3159 | /* If the sequence is unbound, see if we can hang a function key | |
253598e4 JB |
3160 | off the end of it. We only want to scan real keyboard input |
3161 | for function key sequences, so if mock_input says that we're | |
3162 | re-scanning after expanding a function key, don't examine it. */ | |
284f4730 | 3163 | if (first_binding >= nmaps |
253598e4 | 3164 | && t >= mock_input) |
284f4730 JB |
3165 | { |
3166 | Lisp_Object fkey_next; | |
3167 | ||
3168 | /* Scan from fkey_end until we find a bound suffix. */ | |
3169 | while (fkey_end < t) | |
3170 | { | |
067ffa38 JB |
3171 | /* Look up meta-characters by prefixing them |
3172 | with meta_prefix_char. I hate this. */ | |
253598e4 | 3173 | if (keybuf[fkey_end] & 0x80) |
067ffa38 | 3174 | fkey_next = |
cd21b839 JB |
3175 | get_keymap_1 |
3176 | ((get_keyelt | |
3177 | (access_keymap (fkey_map, meta_prefix_char, 1))), | |
3178 | 0); | |
067ffa38 JB |
3179 | else |
3180 | fkey_next = fkey_map; | |
3181 | ||
284f4730 | 3182 | fkey_next = |
067ffa38 | 3183 | get_keyelt (access_keymap |
cd21b839 | 3184 | (fkey_next, keybuf[fkey_end++] & 0x7f, 1)); |
067ffa38 | 3185 | |
85bc5181 | 3186 | /* If keybuf[fkey_start..fkey_end] is bound in the |
a764a753 | 3187 | function key map and it's a suffix of the current |
85bc5181 | 3188 | sequence (i.e. fkey_end == t), replace it with |
a764a753 | 3189 | the binding and restart with fkey_start at the end. */ |
284f4730 JB |
3190 | if (XTYPE (fkey_next) == Lisp_Vector |
3191 | && fkey_end == t) | |
3192 | { | |
3193 | t = fkey_start + XVECTOR (fkey_next)->size; | |
3194 | if (t >= bufsize) | |
3195 | error ("key sequence too long"); | |
3196 | ||
3197 | bcopy (XVECTOR (fkey_next)->contents, | |
3198 | keybuf + fkey_start, | |
3199 | (t - fkey_start) * sizeof (keybuf[0])); | |
3200 | ||
3201 | mock_input = t; | |
3202 | fkey_start = fkey_end = t; | |
3203 | ||
284f4730 JB |
3204 | goto restart; |
3205 | } | |
3206 | ||
3207 | fkey_map = get_keymap_1 (fkey_next, 0); | |
3208 | ||
a764a753 JB |
3209 | /* If we no longer have a bound suffix, try a new positions for |
3210 | fkey_start. */ | |
284f4730 JB |
3211 | if (NILP (fkey_map)) |
3212 | { | |
3213 | fkey_end = ++fkey_start; | |
3214 | fkey_map = Vfunction_key_map; | |
3215 | } | |
3216 | } | |
3217 | } | |
3218 | } | |
3219 | ||
3220 | read_key_sequence_cmd = (first_binding < nmaps | |
3221 | ? defs[first_binding] | |
3222 | : Qnil); | |
3223 | ||
cd21b839 | 3224 | unread_switch_frame = delayed_switch_frame; |
284f4730 JB |
3225 | return t; |
3226 | } | |
3227 | ||
c0a58692 | 3228 | DEFUN ("read-key-sequence", Fread_key_sequence, Sread_key_sequence, 1, 2, 0, |
284f4730 JB |
3229 | "Read a sequence of keystrokes and return as a string or vector.\n\ |
3230 | The sequence is sufficient to specify a non-prefix command in the\n\ | |
3231 | current local and global maps.\n\ | |
3232 | \n\ | |
c0a58692 RS |
3233 | First arg PROMPT is a prompt string. If nil, do not prompt specially.\n\ |
3234 | Second (optional) arg CONTINUE-ECHO, if non-nil, means this key echos\n\ | |
3235 | as a continuation of the previous key.\n\ | |
284f4730 | 3236 | \n\ |
ff11dfa1 | 3237 | If Emacs is running on multiple frames, switching between frames in\n\ |
284f4730 JB |
3238 | the midst of a keystroke will toss any prefix typed so far. A C-g\n\ |
3239 | typed while in this function is treated like any other character, and\n\ | |
3240 | `quit-flag' is not set.") | |
c0a58692 RS |
3241 | (prompt, continue_echo) |
3242 | Lisp_Object prompt, continue_echo; | |
284f4730 JB |
3243 | { |
3244 | Lisp_Object keybuf[30]; | |
3245 | register int i; | |
3246 | struct gcpro gcpro1, gcpro2; | |
3247 | ||
3248 | if (!NILP (prompt)) | |
3249 | CHECK_STRING (prompt, 0); | |
3250 | QUIT; | |
3251 | ||
3252 | bzero (keybuf, sizeof keybuf); | |
3253 | GCPRO1 (keybuf[0]); | |
3254 | gcpro1.nvars = (sizeof keybuf/sizeof (keybuf[0])); | |
3255 | ||
daa37602 | 3256 | if (NILP (continue_echo)) |
c0a58692 RS |
3257 | this_command_key_count = 0; |
3258 | ||
284f4730 JB |
3259 | i = read_key_sequence (keybuf, (sizeof keybuf/sizeof (keybuf[0])), |
3260 | NILP (prompt) ? 0 : XSTRING (prompt)->data); | |
3261 | ||
3262 | UNGCPRO; | |
3263 | return make_array (i, keybuf); | |
3264 | } | |
3265 | \f | |
3266 | DEFUN ("command-execute", Fcommand_execute, Scommand_execute, 1, 2, 0, | |
3267 | "Execute CMD as an editor command.\n\ | |
3268 | CMD must be a symbol that satisfies the `commandp' predicate.\n\ | |
3269 | Optional second arg RECORD-FLAG non-nil\n\ | |
3270 | means unconditionally put this command in `command-history'.\n\ | |
3271 | Otherwise, that is done only if an arg is read using the minibuffer.") | |
3272 | (cmd, record) | |
3273 | Lisp_Object cmd, record; | |
3274 | { | |
3275 | register Lisp_Object final; | |
3276 | register Lisp_Object tem; | |
3277 | Lisp_Object prefixarg; | |
3278 | struct backtrace backtrace; | |
3279 | extern int debug_on_next_call; | |
3280 | ||
3281 | prefixarg = Vprefix_arg, Vprefix_arg = Qnil; | |
3282 | Vcurrent_prefix_arg = prefixarg; | |
3283 | debug_on_next_call = 0; | |
3284 | ||
3285 | if (XTYPE (cmd) == Lisp_Symbol) | |
3286 | { | |
3287 | tem = Fget (cmd, Qdisabled); | |
3288 | if (!NILP (tem)) | |
3289 | return call1 (Vrun_hooks, Vdisabled_command_hook); | |
3290 | } | |
3291 | ||
3292 | while (1) | |
3293 | { | |
ffd56f97 | 3294 | final = Findirect_function (cmd); |
284f4730 JB |
3295 | |
3296 | if (CONSP (final) && (tem = Fcar (final), EQ (tem, Qautoload))) | |
3297 | do_autoload (final, cmd); | |
3298 | else | |
3299 | break; | |
3300 | } | |
3301 | ||
3302 | if (XTYPE (final) == Lisp_String | |
3303 | || XTYPE (final) == Lisp_Vector) | |
3304 | { | |
3305 | /* If requested, place the macro in the command history. For | |
3306 | other sorts of commands, call-interactively takes care of | |
3307 | this. */ | |
3308 | if (!NILP (record)) | |
3309 | Vcommand_history | |
3310 | = Fcons (Fcons (Qexecute_kbd_macro, | |
3311 | Fcons (final, Fcons (prefixarg, Qnil))), | |
3312 | Vcommand_history); | |
3313 | ||
3314 | return Fexecute_kbd_macro (final, prefixarg); | |
3315 | } | |
3316 | if (CONSP (final) || XTYPE (final) == Lisp_Subr | |
3317 | || XTYPE (final) == Lisp_Compiled) | |
3318 | { | |
3319 | backtrace.next = backtrace_list; | |
3320 | backtrace_list = &backtrace; | |
3321 | backtrace.function = &Qcall_interactively; | |
3322 | backtrace.args = &cmd; | |
3323 | backtrace.nargs = 1; | |
3324 | backtrace.evalargs = 0; | |
3325 | ||
3326 | tem = Fcall_interactively (cmd, record); | |
3327 | ||
3328 | backtrace_list = backtrace.next; | |
3329 | return tem; | |
3330 | } | |
3331 | return Qnil; | |
3332 | } | |
3333 | \f | |
284f4730 JB |
3334 | DEFUN ("execute-extended-command", Fexecute_extended_command, Sexecute_extended_command, |
3335 | 1, 1, "P", | |
3336 | "Read function name, then read its arguments and call it.") | |
3337 | (prefixarg) | |
3338 | Lisp_Object prefixarg; | |
3339 | { | |
3340 | Lisp_Object function; | |
3341 | char buf[40]; | |
3342 | Lisp_Object saved_keys; | |
3343 | struct gcpro gcpro1; | |
3344 | ||
3345 | saved_keys = Fthis_command_keys (); | |
3346 | buf[0] = 0; | |
3347 | GCPRO1 (saved_keys); | |
3348 | ||
3349 | if (EQ (prefixarg, Qminus)) | |
3350 | strcpy (buf, "- "); | |
3351 | else if (CONSP (prefixarg) && XINT (XCONS (prefixarg)->car) == 4) | |
3352 | strcpy (buf, "C-u "); | |
3353 | else if (CONSP (prefixarg) && XTYPE (XCONS (prefixarg)->car) == Lisp_Int) | |
3354 | sprintf (buf, "%d ", XINT (XCONS (prefixarg)->car)); | |
3355 | else if (XTYPE (prefixarg) == Lisp_Int) | |
3356 | sprintf (buf, "%d ", XINT (prefixarg)); | |
3357 | ||
3358 | /* This isn't strictly correct if execute-extended-command | |
3359 | is bound to anything else. Perhaps it should use | |
3360 | this_command_keys? */ | |
3361 | strcat (buf, "M-x "); | |
3362 | ||
3363 | /* Prompt with buf, and then read a string, completing from and | |
3364 | restricting to the set of all defined commands. Don't provide | |
3365 | any initial input. The last Qnil says not to perform a | |
3366 | peculiar hack on the initial input. */ | |
3367 | function = Fcompleting_read (build_string (buf), | |
3368 | Vobarray, Qcommandp, | |
3369 | Qt, Qnil, Qnil); | |
3370 | ||
1113d9db JB |
3371 | /* Set this_command_keys to the concatenation of saved_keys and |
3372 | function, followed by a RET. */ | |
284f4730 | 3373 | { |
1113d9db | 3374 | struct Lisp_String *str; |
284f4730 JB |
3375 | int i; |
3376 | Lisp_Object tem; | |
3377 | ||
1113d9db JB |
3378 | this_command_key_count = 0; |
3379 | ||
3380 | str = XSTRING (saved_keys); | |
3381 | for (i = 0; i < str->size; i++) | |
284f4730 | 3382 | { |
1113d9db | 3383 | XFASTINT (tem) = str->data[i]; |
284f4730 JB |
3384 | add_command_key (tem); |
3385 | } | |
1113d9db JB |
3386 | |
3387 | str = XSTRING (function); | |
3388 | for (i = 0; i < str->size; i++) | |
3389 | { | |
3390 | XFASTINT (tem) = str->data[i]; | |
3391 | add_command_key (tem); | |
3392 | } | |
3393 | ||
3394 | XFASTINT (tem) = '\015'; | |
3395 | add_command_key (tem); | |
284f4730 JB |
3396 | } |
3397 | ||
3398 | UNGCPRO; | |
3399 | ||
0a7f1fc0 | 3400 | function = Fintern (function, Qnil); |
284f4730 JB |
3401 | Vprefix_arg = prefixarg; |
3402 | this_command = function; | |
3403 | ||
3404 | return Fcommand_execute (function, Qt); | |
3405 | } | |
3406 | \f | |
3407 | ||
3408 | detect_input_pending () | |
3409 | { | |
3410 | if (!input_pending) | |
3411 | get_input_pending (&input_pending); | |
3412 | ||
3413 | return input_pending; | |
3414 | } | |
3415 | ||
ffd56f97 JB |
3416 | /* This is called in some cases before a possible quit. |
3417 | It cases the next call to detect_input_pending to recompute input_pending. | |
3418 | So calling this function unnecessarily can't do any harm. */ | |
3419 | clear_input_pending () | |
3420 | { | |
3421 | input_pending = 0; | |
3422 | } | |
3423 | ||
284f4730 JB |
3424 | DEFUN ("input-pending-p", Finput_pending_p, Sinput_pending_p, 0, 0, 0, |
3425 | "T if command input is currently available with no waiting.\n\ | |
3426 | Actually, the value is nil only if we can be sure that no input is available.") | |
3427 | () | |
3428 | { | |
3429 | if (!NILP (unread_command_char)) | |
3430 | return (Qt); | |
3431 | ||
3432 | return detect_input_pending () ? Qt : Qnil; | |
3433 | } | |
3434 | ||
3435 | DEFUN ("recent-keys", Frecent_keys, Srecent_keys, 0, 0, 0, | |
daa37602 | 3436 | "Return vector of last 100 chars read from terminal.") |
284f4730 JB |
3437 | () |
3438 | { | |
5160df46 | 3439 | Lisp_Object *keys = XVECTOR (recent_keys)->contents; |
284f4730 JB |
3440 | Lisp_Object val; |
3441 | ||
3442 | if (total_keys < NUM_RECENT_KEYS) | |
5160df46 | 3443 | return Fvector (total_keys, keys); |
284f4730 JB |
3444 | else |
3445 | { | |
5160df46 JB |
3446 | val = Fvector (NUM_RECENT_KEYS, keys); |
3447 | bcopy (keys + recent_keys_index, | |
284f4730 JB |
3448 | XVECTOR (val)->contents, |
3449 | (NUM_RECENT_KEYS - recent_keys_index) * sizeof (Lisp_Object)); | |
5160df46 | 3450 | bcopy (keys, |
284f4730 JB |
3451 | XVECTOR (val)->contents + NUM_RECENT_KEYS - recent_keys_index, |
3452 | recent_keys_index * sizeof (Lisp_Object)); | |
3453 | return val; | |
3454 | } | |
3455 | } | |
3456 | ||
3457 | DEFUN ("this-command-keys", Fthis_command_keys, Sthis_command_keys, 0, 0, 0, | |
3458 | "Return string of the keystrokes that invoked this command.") | |
3459 | () | |
3460 | { | |
6569cc8d JB |
3461 | return make_array (this_command_key_count, |
3462 | XVECTOR (this_command_keys)->contents); | |
284f4730 JB |
3463 | } |
3464 | ||
3465 | DEFUN ("recursion-depth", Frecursion_depth, Srecursion_depth, 0, 0, 0, | |
3466 | "Return the current depth in recursive edits.") | |
3467 | () | |
3468 | { | |
3469 | Lisp_Object temp; | |
3470 | XFASTINT (temp) = command_loop_level + minibuf_level; | |
3471 | return temp; | |
3472 | } | |
3473 | ||
3474 | DEFUN ("open-dribble-file", Fopen_dribble_file, Sopen_dribble_file, 1, 1, | |
3475 | "FOpen dribble file: ", | |
3476 | "Start writing all keyboard characters to FILE.") | |
3477 | (file) | |
3478 | Lisp_Object file; | |
3479 | { | |
3480 | if (NILP (file)) | |
3481 | { | |
3482 | fclose (dribble); | |
3483 | dribble = 0; | |
3484 | } | |
3485 | else | |
3486 | { | |
3487 | file = Fexpand_file_name (file, Qnil); | |
3488 | dribble = fopen (XSTRING (file)->data, "w"); | |
3489 | } | |
3490 | return Qnil; | |
3491 | } | |
3492 | ||
3493 | DEFUN ("discard-input", Fdiscard_input, Sdiscard_input, 0, 0, 0, | |
3494 | "Discard the contents of the terminal input buffer.\n\ | |
3495 | Also cancel any kbd macro being defined.") | |
3496 | () | |
3497 | { | |
3498 | defining_kbd_macro = 0; | |
3499 | update_mode_lines++; | |
3500 | ||
284f4730 JB |
3501 | unread_command_char = Qnil; |
3502 | ||
3503 | discard_tty_input (); | |
3504 | ||
3505 | kbd_fetch_ptr = kbd_store_ptr; | |
3506 | input_pending = 0; | |
3507 | ||
3508 | return Qnil; | |
3509 | } | |
3510 | \f | |
3511 | DEFUN ("suspend-emacs", Fsuspend_emacs, Ssuspend_emacs, 0, 1, "", | |
3512 | "Stop Emacs and return to superior process. You can resume later.\n\ | |
3513 | On systems that don't have job control, run a subshell instead.\n\n\ | |
3514 | If optional arg STUFFSTRING is non-nil, its characters are stuffed\n\ | |
3515 | to be read as terminal input by Emacs's superior shell.\n\ | |
3516 | Before suspending, if `suspend-hook' is bound and value is non-nil\n\ | |
3517 | call the value as a function of no args. Don't suspend if it returns non-nil.\n\ | |
3518 | Otherwise, suspend normally and after resumption call\n\ | |
3519 | `suspend-resume-hook' if that is bound and non-nil.\n\ | |
3520 | \n\ | |
3521 | Some operating systems cannot stop the Emacs process and resume it later.\n\ | |
3522 | On such systems, Emacs will start a subshell and wait for it to exit.") | |
3523 | (stuffstring) | |
3524 | Lisp_Object stuffstring; | |
3525 | { | |
3526 | register Lisp_Object tem; | |
3527 | int count = specpdl_ptr - specpdl; | |
3528 | int old_height, old_width; | |
3529 | int width, height; | |
3530 | struct gcpro gcpro1; | |
3531 | extern init_sys_modes (); | |
3532 | ||
3533 | if (!NILP (stuffstring)) | |
3534 | CHECK_STRING (stuffstring, 0); | |
3535 | GCPRO1 (stuffstring); | |
3536 | ||
3537 | /* Call value of suspend-hook | |
3538 | if it is bound and value is non-nil. */ | |
3539 | if (!NILP (Vrun_hooks)) | |
3540 | { | |
3541 | tem = call1 (Vrun_hooks, intern ("suspend-hook")); | |
3542 | if (!EQ (tem, Qnil)) return Qnil; | |
3543 | } | |
3544 | ||
ff11dfa1 | 3545 | get_frame_size (&old_width, &old_height); |
284f4730 JB |
3546 | reset_sys_modes (); |
3547 | /* sys_suspend can get an error if it tries to fork a subshell | |
3548 | and the system resources aren't available for that. */ | |
3549 | record_unwind_protect (init_sys_modes, 0); | |
3550 | stuff_buffered_input (stuffstring); | |
3551 | sys_suspend (); | |
3552 | unbind_to (count, Qnil); | |
3553 | ||
3554 | /* Check if terminal/window size has changed. | |
3555 | Note that this is not useful when we are running directly | |
3556 | with a window system; but suspend should be disabled in that case. */ | |
ff11dfa1 | 3557 | get_frame_size (&width, &height); |
284f4730 | 3558 | if (width != old_width || height != old_height) |
d5045cf9 | 3559 | change_frame_size (0, height, width, 0, 0); |
284f4730 JB |
3560 | |
3561 | /* Call value of suspend-resume-hook | |
3562 | if it is bound and value is non-nil. */ | |
3563 | if (!NILP (Vrun_hooks)) | |
3564 | call1 (Vrun_hooks, intern ("suspend-resume-hook")); | |
3565 | ||
3566 | UNGCPRO; | |
3567 | return Qnil; | |
3568 | } | |
3569 | ||
3570 | /* If STUFFSTRING is a string, stuff its contents as pending terminal input. | |
3571 | Then in any case stuff anthing Emacs has read ahead and not used. */ | |
3572 | ||
3573 | stuff_buffered_input (stuffstring) | |
3574 | Lisp_Object stuffstring; | |
3575 | { | |
3576 | register unsigned char *p; | |
3577 | ||
3578 | /* stuff_char works only in BSD, versions 4.2 and up. */ | |
3579 | #ifdef BSD | |
3580 | #ifndef BSD4_1 | |
3581 | if (XTYPE (stuffstring) == Lisp_String) | |
3582 | { | |
3583 | register int count; | |
3584 | ||
3585 | p = XSTRING (stuffstring)->data; | |
3586 | count = XSTRING (stuffstring)->size; | |
3587 | while (count-- > 0) | |
3588 | stuff_char (*p++); | |
3589 | stuff_char ('\n'); | |
3590 | } | |
3591 | /* Anything we have read ahead, put back for the shell to read. */ | |
3592 | while (kbd_fetch_ptr != kbd_store_ptr) | |
3593 | { | |
3594 | if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE) | |
3595 | kbd_fetch_ptr = kbd_buffer; | |
3596 | if (kbd_fetch_ptr->kind == ascii_keystroke) | |
3597 | stuff_char (XINT (kbd_fetch_ptr->code)); | |
3598 | kbd_fetch_ptr++; | |
3599 | } | |
3600 | input_pending = 0; | |
3601 | #endif | |
3602 | #endif /* BSD and not BSD4_1 */ | |
3603 | } | |
3604 | \f | |
ffd56f97 JB |
3605 | set_waiting_for_input (time_to_clear) |
3606 | EMACS_TIME *time_to_clear; | |
284f4730 | 3607 | { |
ffd56f97 | 3608 | input_available_clear_time = time_to_clear; |
284f4730 JB |
3609 | |
3610 | /* Tell interrupt_signal to throw back to read_char, */ | |
3611 | waiting_for_input = 1; | |
3612 | ||
3613 | /* If interrupt_signal was called before and buffered a C-g, | |
3614 | make it run again now, to avoid timing error. */ | |
3615 | if (!NILP (Vquit_flag)) | |
3616 | quit_throw_to_read_char (); | |
3617 | ||
3618 | /* If alarm has gone off already, echo now. */ | |
3619 | if (echo_flag) | |
3620 | { | |
3621 | echo (); | |
3622 | echo_flag = 0; | |
3623 | } | |
3624 | } | |
3625 | ||
3626 | clear_waiting_for_input () | |
3627 | { | |
3628 | /* Tell interrupt_signal not to throw back to read_char, */ | |
3629 | waiting_for_input = 0; | |
ffd56f97 | 3630 | input_available_clear_time = 0; |
284f4730 JB |
3631 | } |
3632 | ||
3633 | /* This routine is called at interrupt level in response to C-G. | |
3634 | If interrupt_input, this is the handler for SIGINT. | |
3635 | Otherwise, it is called from kbd_buffer_store_event, | |
3636 | in handling SIGIO or SIGTINT. | |
3637 | ||
3638 | If `waiting_for_input' is non zero, then unless `echoing' is nonzero, | |
3639 | immediately throw back to read_char. | |
3640 | ||
3641 | Otherwise it sets the Lisp variable quit-flag not-nil. | |
3642 | This causes eval to throw, when it gets a chance. | |
3643 | If quit-flag is already non-nil, it stops the job right away. */ | |
3644 | ||
3645 | SIGTYPE | |
3646 | interrupt_signal () | |
3647 | { | |
3648 | char c; | |
3649 | /* Must preserve main program's value of errno. */ | |
3650 | int old_errno = errno; | |
3651 | extern Lisp_Object Vwindow_system; | |
3652 | ||
3653 | #ifdef USG | |
3654 | /* USG systems forget handlers when they are used; | |
3655 | must reestablish each time */ | |
3656 | signal (SIGINT, interrupt_signal); | |
3657 | signal (SIGQUIT, interrupt_signal); | |
3658 | #endif /* USG */ | |
3659 | ||
3660 | cancel_echoing (); | |
3661 | ||
d5045cf9 | 3662 | if (!NILP (Vquit_flag) && FRAME_TERMCAP_P (selected_frame)) |
284f4730 JB |
3663 | { |
3664 | fflush (stdout); | |
3665 | reset_sys_modes (); | |
3666 | sigfree (); | |
3667 | #ifdef SIGTSTP /* Support possible in later USG versions */ | |
3668 | /* | |
3669 | * On systems which can suspend the current process and return to the original | |
3670 | * shell, this command causes the user to end up back at the shell. | |
3671 | * The "Auto-save" and "Abort" questions are not asked until | |
3672 | * the user elects to return to emacs, at which point he can save the current | |
3673 | * job and either dump core or continue. | |
3674 | */ | |
3675 | sys_suspend (); | |
3676 | #else | |
3677 | #ifdef VMS | |
3678 | if (sys_suspend () == -1) | |
3679 | { | |
3680 | printf ("Not running as a subprocess;\n"); | |
3681 | printf ("you can continue or abort.\n"); | |
3682 | } | |
3683 | #else /* not VMS */ | |
3684 | /* Perhaps should really fork an inferior shell? | |
3685 | But that would not provide any way to get back | |
3686 | to the original shell, ever. */ | |
3687 | printf ("No support for stopping a process on this operating system;\n"); | |
3688 | printf ("you can continue or abort.\n"); | |
3689 | #endif /* not VMS */ | |
3690 | #endif /* not SIGTSTP */ | |
3691 | printf ("Auto-save? (y or n) "); | |
3692 | fflush (stdout); | |
3693 | if (((c = getchar ()) & ~040) == 'Y') | |
3694 | Fdo_auto_save (Qnil, Qnil); | |
3695 | while (c != '\n') c = getchar (); | |
3696 | #ifdef VMS | |
3697 | printf ("Abort (and enter debugger)? (y or n) "); | |
3698 | #else /* not VMS */ | |
3699 | printf ("Abort (and dump core)? (y or n) "); | |
3700 | #endif /* not VMS */ | |
3701 | fflush (stdout); | |
3702 | if (((c = getchar ()) & ~040) == 'Y') | |
3703 | abort (); | |
3704 | while (c != '\n') c = getchar (); | |
3705 | printf ("Continuing...\n"); | |
3706 | fflush (stdout); | |
3707 | init_sys_modes (); | |
3708 | } | |
3709 | else | |
3710 | { | |
3711 | /* If executing a function that wants to be interrupted out of | |
3712 | and the user has not deferred quitting by binding `inhibit-quit' | |
3713 | then quit right away. */ | |
3714 | if (immediate_quit && NILP (Vinhibit_quit)) | |
3715 | { | |
3716 | immediate_quit = 0; | |
3717 | sigfree (); | |
3718 | Fsignal (Qquit, Qnil); | |
3719 | } | |
3720 | else | |
3721 | /* Else request quit when it's safe */ | |
3722 | Vquit_flag = Qt; | |
3723 | } | |
3724 | ||
3725 | if (waiting_for_input && !echoing) | |
3726 | quit_throw_to_read_char (); | |
3727 | ||
3728 | errno = old_errno; | |
3729 | } | |
3730 | ||
3731 | /* Handle a C-g by making read_char return C-g. */ | |
3732 | ||
3733 | quit_throw_to_read_char () | |
3734 | { | |
3735 | quit_error_check (); | |
3736 | sigfree (); | |
3737 | /* Prevent another signal from doing this before we finish. */ | |
f76475ad | 3738 | clear_waiting_for_input (); |
284f4730 JB |
3739 | input_pending = 0; |
3740 | ||
284f4730 JB |
3741 | unread_command_char = Qnil; |
3742 | ||
3743 | _longjmp (getcjmp, 1); | |
3744 | } | |
3745 | \f | |
3746 | DEFUN ("set-input-mode", Fset_input_mode, Sset_input_mode, 3, 4, 0, | |
3747 | "Set mode of reading keyboard input.\n\ | |
464f8898 RS |
3748 | First arg INTERRUPT non-nil means use input interrupts;\n\ |
3749 | nil means use CBREAK mode.\n\ | |
3750 | Second arg FLOW non-nil means use ^S/^Q flow control for output to terminal\n\ | |
284f4730 | 3751 | (no effect except in CBREAK mode).\n\ |
464f8898 | 3752 | Third arg META non-nil means accept 8-bit input (for a Meta key).\n\ |
284f4730 | 3753 | Otherwise, the top bit is ignored, on the assumption it is parity.\n\ |
464f8898 | 3754 | Optional fourth arg QUIT if non-nil specifies character to use for quitting.") |
284f4730 JB |
3755 | (interrupt, flow, meta, quit) |
3756 | Lisp_Object interrupt, flow, meta, quit; | |
3757 | { | |
3758 | if (!NILP (quit) | |
3759 | && (XTYPE (quit) != Lisp_Int | |
3760 | || XINT (quit) < 0 || XINT (quit) > 0400)) | |
3761 | error ("set-input-mode: QUIT must be an ASCII character."); | |
3762 | ||
3763 | reset_sys_modes (); | |
3764 | #ifdef SIGIO | |
3765 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
3766 | #ifdef NO_SOCK_SIGIO | |
3767 | if (read_socket_hook) | |
3768 | interrupt_input = 0; /* No interrupts if reading from a socket. */ | |
3769 | else | |
3770 | #endif /* NO_SOCK_SIGIO */ | |
3771 | interrupt_input = !NILP (interrupt); | |
3772 | #else /* not SIGIO */ | |
3773 | interrupt_input = 0; | |
3774 | #endif /* not SIGIO */ | |
3775 | /* Our VMS input only works by interrupts, as of now. */ | |
3776 | #ifdef VMS | |
3777 | interrupt_input = 1; | |
3778 | #endif | |
3779 | flow_control = !NILP (flow); | |
3780 | meta_key = !NILP (meta); | |
3781 | if (!NILP (quit)) | |
3782 | /* Don't let this value be out of range. */ | |
3783 | quit_char = XINT (quit) & (meta_key ? 0377 : 0177); | |
3784 | ||
3785 | init_sys_modes (); | |
3786 | return Qnil; | |
3787 | } | |
3788 | \f | |
3789 | init_keyboard () | |
3790 | { | |
284f4730 JB |
3791 | /* This is correct before outermost invocation of the editor loop */ |
3792 | command_loop_level = -1; | |
3793 | immediate_quit = 0; | |
3794 | quit_char = Ctl ('g'); | |
3795 | unread_command_char = Qnil; | |
284f4730 | 3796 | total_keys = 0; |
9deb415a | 3797 | recent_keys_index = 0; |
284f4730 JB |
3798 | kbd_fetch_ptr = kbd_buffer; |
3799 | kbd_store_ptr = kbd_buffer; | |
3800 | do_mouse_tracking = 0; | |
3801 | input_pending = 0; | |
3802 | ||
3803 | if (!noninteractive) | |
3804 | { | |
3805 | signal (SIGINT, interrupt_signal); | |
3806 | #ifdef HAVE_TERMIO | |
3807 | /* For systems with SysV TERMIO, C-g is set up for both SIGINT and | |
3808 | SIGQUIT and we can't tell which one it will give us. */ | |
3809 | signal (SIGQUIT, interrupt_signal); | |
3810 | #endif /* HAVE_TERMIO */ | |
3811 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
3812 | #ifdef SIGIO | |
3813 | signal (SIGIO, input_available_signal); | |
8ea0a720 | 3814 | #endif /* SIGIO */ |
284f4730 JB |
3815 | } |
3816 | ||
3817 | /* Use interrupt input by default, if it works and noninterrupt input | |
3818 | has deficiencies. */ | |
3819 | ||
3820 | #ifdef INTERRUPT_INPUT | |
3821 | interrupt_input = 1; | |
3822 | #else | |
3823 | interrupt_input = 0; | |
3824 | #endif | |
3825 | ||
3826 | /* Our VMS input only works by interrupts, as of now. */ | |
3827 | #ifdef VMS | |
3828 | interrupt_input = 1; | |
3829 | #endif | |
3830 | ||
3831 | sigfree (); | |
3832 | dribble = 0; | |
3833 | ||
3834 | if (keyboard_init_hook) | |
3835 | (*keyboard_init_hook) (); | |
3836 | ||
3837 | #ifdef POLL_FOR_INPUT | |
3838 | poll_suppress_count = 1; | |
3839 | start_polling (); | |
3840 | #endif | |
3841 | } | |
3842 | ||
3843 | /* This type's only use is in syms_of_keyboard, to initialize the | |
3844 | event header symbols and put properties on them. */ | |
3845 | struct event_head { | |
3846 | Lisp_Object *var; | |
3847 | char *name; | |
3848 | Lisp_Object *kind; | |
3849 | }; | |
3850 | ||
3851 | struct event_head head_table[] = { | |
3852 | &Qmouse_movement, "mouse-movement", &Qmouse_movement, | |
3853 | &Qvscrollbar_part, "vscrollbar-part", &Qscrollbar_click, | |
3854 | &Qvslider_part, "vslider-part", &Qscrollbar_click, | |
3855 | &Qvthumbup_part, "vthumbup-part", &Qscrollbar_click, | |
3856 | &Qvthumbdown_part, "vthumbdown-part", &Qscrollbar_click, | |
3857 | &Qhscrollbar_part, "hscrollbar-part", &Qscrollbar_click, | |
3858 | &Qhslider_part, "hslider-part", &Qscrollbar_click, | |
3859 | &Qhthumbleft_part, "hthumbleft-part", &Qscrollbar_click, | |
cd21b839 JB |
3860 | &Qhthumbright_part,"hthumbright-part", &Qscrollbar_click, |
3861 | &Qswitch_frame, "switch-frame", &Qswitch_frame | |
284f4730 JB |
3862 | }; |
3863 | ||
3864 | syms_of_keyboard () | |
3865 | { | |
3866 | Qself_insert_command = intern ("self-insert-command"); | |
3867 | staticpro (&Qself_insert_command); | |
3868 | ||
3869 | Qforward_char = intern ("forward-char"); | |
3870 | staticpro (&Qforward_char); | |
3871 | ||
3872 | Qbackward_char = intern ("backward-char"); | |
3873 | staticpro (&Qbackward_char); | |
3874 | ||
3875 | Qdisabled = intern ("disabled"); | |
3876 | staticpro (&Qdisabled); | |
3877 | ||
3878 | Qfunction_key = intern ("function-key"); | |
3879 | staticpro (&Qfunction_key); | |
13b5e56c | 3880 | Qmouse_click = intern ("mouse-click"); |
284f4730 JB |
3881 | staticpro (&Qmouse_click); |
3882 | Qmouse_movement = intern ("scrollbar-click"); | |
3883 | staticpro (&Qmouse_movement); | |
3884 | ||
3885 | Qmode_line = intern ("mode-line"); | |
3886 | staticpro (&Qmode_line); | |
e5d77022 JB |
3887 | Qvertical_line = intern ("vertical-line"); |
3888 | staticpro (&Qvertical_line); | |
284f4730 | 3889 | |
cd21b839 | 3890 | Qevent_kind = intern ("event-kind"); |
284f4730 | 3891 | staticpro (&Qevent_kind); |
88cb0656 JB |
3892 | Qevent_symbol_elements = intern ("event-symbol-elements"); |
3893 | staticpro (&Qevent_symbol_elements); | |
0a7f1fc0 JB |
3894 | Qevent_symbol_element_mask = intern ("event-symbol-element-mask"); |
3895 | staticpro (&Qevent_symbol_element_mask); | |
3896 | Qmodifier_cache = intern ("modifier-cache"); | |
3897 | staticpro (&Qmodifier_cache); | |
284f4730 JB |
3898 | |
3899 | { | |
3900 | struct event_head *p; | |
3901 | ||
3902 | for (p = head_table; | |
3903 | p < head_table + (sizeof (head_table) / sizeof (head_table[0])); | |
3904 | p++) | |
3905 | { | |
3906 | *p->var = intern (p->name); | |
3907 | staticpro (p->var); | |
3908 | Fput (*p->var, Qevent_kind, *p->kind); | |
88cb0656 | 3909 | Fput (*p->var, Qevent_symbol_elements, Fcons (*p->var, Qnil)); |
284f4730 JB |
3910 | } |
3911 | } | |
3912 | ||
88cb0656 JB |
3913 | { |
3914 | int i; | |
3915 | ||
3916 | for (i = 0; i < NUM_MOUSE_BUTTONS; i++) | |
3917 | staticpro (&button_down_location[i].window); | |
3918 | } | |
3919 | ||
3920 | { | |
3921 | int i; | |
3922 | int len = sizeof (modifier_names) / sizeof (modifier_names[0]); | |
3923 | ||
3924 | modifier_symbols = Fmake_vector (make_number (len), Qnil); | |
3925 | for (i = 0; i < len; i++) | |
3926 | XVECTOR (modifier_symbols)->contents[i] = intern (modifier_names[i]); | |
3927 | staticpro (&modifier_symbols); | |
3928 | } | |
3929 | ||
9deb415a JB |
3930 | recent_keys = Fmake_vector (make_number (NUM_RECENT_KEYS), Qnil); |
3931 | staticpro (&recent_keys); | |
3932 | ||
6569cc8d | 3933 | this_command_keys = Fmake_vector (make_number (40), Qnil); |
715d9345 | 3934 | staticpro (&this_command_keys); |
6569cc8d | 3935 | |
284f4730 JB |
3936 | func_key_syms = Qnil; |
3937 | staticpro (&func_key_syms); | |
3938 | ||
3939 | mouse_syms = Qnil; | |
3940 | staticpro (&mouse_syms); | |
3941 | ||
cd21b839 JB |
3942 | unread_switch_frame = Qnil; |
3943 | staticpro (&unread_switch_frame); | |
3944 | ||
284f4730 JB |
3945 | defsubr (&Sread_key_sequence); |
3946 | defsubr (&Srecursive_edit); | |
3947 | defsubr (&Strack_mouse); | |
3948 | defsubr (&Smouse_click_p); | |
3949 | defsubr (&Sinput_pending_p); | |
3950 | defsubr (&Scommand_execute); | |
3951 | defsubr (&Srecent_keys); | |
3952 | defsubr (&Sthis_command_keys); | |
3953 | defsubr (&Ssuspend_emacs); | |
3954 | defsubr (&Sabort_recursive_edit); | |
3955 | defsubr (&Sexit_recursive_edit); | |
3956 | defsubr (&Srecursion_depth); | |
3957 | defsubr (&Stop_level); | |
3958 | defsubr (&Sdiscard_input); | |
3959 | defsubr (&Sopen_dribble_file); | |
3960 | defsubr (&Sset_input_mode); | |
3961 | defsubr (&Sexecute_extended_command); | |
3962 | ||
3963 | DEFVAR_LISP ("disabled-command-hook", &Vdisabled_command_hook, | |
3964 | "Value is called instead of any command that is disabled\n\ | |
7d6de002 | 3965 | \(has a non-nil `disabled' property)."); |
284f4730 JB |
3966 | |
3967 | DEFVAR_LISP ("last-command-char", &last_command_char, | |
3968 | "Last terminal input key that was part of a command."); | |
3969 | ||
7d6de002 RS |
3970 | DEFVAR_LISP ("last-nonmenu-event", &last_nonmenu_event, |
3971 | "Last terminal input key in a command, except for mouse menus.\n\ | |
3972 | Mouse menus give back keys that don't look like mouse events;\n\ | |
3973 | this variable holds the actual mouse event that led to the menu,\n\ | |
3974 | so that you can determine whether the command was run by mouse or not."); | |
3975 | ||
284f4730 JB |
3976 | DEFVAR_LISP ("last-input-char", &last_input_char, |
3977 | "Last terminal input key."); | |
3978 | ||
3979 | DEFVAR_LISP ("unread-command-char", &unread_command_char, | |
3980 | "Object to be read as next input from input stream, or nil if none."); | |
3981 | ||
3982 | DEFVAR_LISP ("meta-prefix-char", &meta_prefix_char, | |
3983 | "Meta-prefix character code. Meta-foo as command input\n\ | |
3984 | turns into this character followed by foo."); | |
3985 | XSET (meta_prefix_char, Lisp_Int, 033); | |
3986 | ||
3987 | DEFVAR_LISP ("last-command", &last_command, | |
3988 | "The last command executed. Normally a symbol with a function definition,\n\ | |
3989 | but can be whatever was found in the keymap, or whatever the variable\n\ | |
3990 | `this-command' was set to by that command."); | |
3991 | last_command = Qnil; | |
3992 | ||
3993 | DEFVAR_LISP ("this-command", &this_command, | |
3994 | "The command now being executed.\n\ | |
3995 | The command can set this variable; whatever is put here\n\ | |
3996 | will be in `last-command' during the following command."); | |
3997 | this_command = Qnil; | |
3998 | ||
3999 | DEFVAR_INT ("auto-save-interval", &auto_save_interval, | |
4000 | "*Number of keyboard input characters between auto-saves.\n\ | |
4001 | Zero means disable autosaving due to number of characters typed."); | |
4002 | auto_save_interval = 300; | |
4003 | ||
4004 | DEFVAR_LISP ("auto-save-timeout", &Vauto_save_timeout, | |
4005 | "*Number of seconds idle time before auto-save.\n\ | |
06ef7355 RS |
4006 | Zero or nil means disable auto-saving due to idleness.\n\ |
4007 | After auto-saving due to this many seconds of idle time,\n\ | |
84447c71 | 4008 | Emacs also does a garbage collection if that seems to be warranted."); |
284f4730 JB |
4009 | XFASTINT (Vauto_save_timeout) = 30; |
4010 | ||
4011 | DEFVAR_INT ("echo-keystrokes", &echo_keystrokes, | |
4012 | "*Nonzero means echo unfinished commands after this many seconds of pause."); | |
4013 | echo_keystrokes = 1; | |
4014 | ||
4015 | DEFVAR_INT ("polling-period", &polling_period, | |
4016 | "*Interval between polling for input during Lisp execution.\n\ | |
4017 | The reason for polling is to make C-g work to stop a running program.\n\ | |
4018 | Polling is needed only when using X windows and SIGIO does not work.\n\ | |
4019 | Polling is automatically disabled in all other cases."); | |
4020 | polling_period = 2; | |
4021 | ||
4022 | DEFVAR_INT ("num-input-keys", &num_input_keys, | |
4023 | "*Number of complete keys read from the keyboard so far."); | |
4024 | num_input_keys = 0; | |
4025 | ||
ff11dfa1 | 4026 | DEFVAR_LISP ("last-event-frame", &Vlast_event_frame, |
fce33686 JB |
4027 | "*The frame in which the most recently read event occurred.\n\ |
4028 | If the last event came from a keyboard macro, this is set to `macro'."); | |
ff11dfa1 | 4029 | Vlast_event_frame = Qnil; |
284f4730 JB |
4030 | |
4031 | DEFVAR_LISP ("help-char", &help_char, | |
4032 | "Character to recognize as meaning Help.\n\ | |
4033 | When it is read, do `(eval help-form)', and display result if it's a string.\n\ | |
4034 | If the value of `help-form' is nil, this char can be read normally."); | |
4035 | XSET (help_char, Lisp_Int, Ctl ('H')); | |
4036 | ||
4037 | DEFVAR_LISP ("help-form", &Vhelp_form, | |
4038 | "Form to execute when character help-char is read.\n\ | |
4039 | If the form returns a string, that string is displayed.\n\ | |
4040 | If `help-form' is nil, the help char is not recognized."); | |
4041 | Vhelp_form = Qnil; | |
4042 | ||
4043 | DEFVAR_LISP ("top-level", &Vtop_level, | |
4044 | "Form to evaluate when Emacs starts up.\n\ | |
4045 | Useful to set before you dump a modified Emacs."); | |
4046 | Vtop_level = Qnil; | |
4047 | ||
4048 | DEFVAR_LISP ("keyboard-translate-table", &Vkeyboard_translate_table, | |
4049 | "String used as translate table for keyboard input, or nil.\n\ | |
4050 | Each character is looked up in this string and the contents used instead.\n\ | |
4051 | If string is of length N, character codes N and up are untranslated."); | |
4052 | Vkeyboard_translate_table = Qnil; | |
4053 | ||
284f4730 | 4054 | DEFVAR_BOOL ("menu-prompting", &menu_prompting, |
7d6de002 | 4055 | "Non-nil means prompt with menus when appropriate.\n\ |
284f4730 | 4056 | This is done when reading from a keymap that has a prompt string,\n\ |
7d6de002 RS |
4057 | for elements that have prompt strings.\n\ |
4058 | The menu is displayed on the screen\n\ | |
4059 | if X menus were enabled at configuration\n\ | |
4060 | time and the previous event was a mouse click prefix key.\n\ | |
4061 | Otherwise, menu prompting uses the echo area."); | |
284f4730 JB |
4062 | menu_prompting = 1; |
4063 | ||
4064 | DEFVAR_LISP ("menu-prompt-more-char", &menu_prompt_more_char, | |
4065 | "Character to see next line of menu prompt.\n\ | |
4066 | Type this character while in a menu prompt to rotate around the lines of it."); | |
4067 | XSET (menu_prompt_more_char, Lisp_Int, ' '); | |
4068 | } | |
4069 | ||
4070 | keys_of_keyboard () | |
4071 | { | |
4072 | initial_define_key (global_map, Ctl ('Z'), "suspend-emacs"); | |
4073 | initial_define_key (control_x_map, Ctl ('Z'), "suspend-emacs"); | |
4074 | initial_define_key (meta_map, Ctl ('C'), "exit-recursive-edit"); | |
4075 | initial_define_key (global_map, Ctl (']'), "abort-recursive-edit"); | |
4076 | initial_define_key (meta_map, 'x', "execute-extended-command"); | |
4077 | } |