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" | |
31 | #include "screen.h" | |
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 JB |
44 | #include "syssignal.h" |
45 | #include "systerm.h" | |
ffd56f97 | 46 | #include "systime.h" |
52baf19e JB |
47 | |
48 | extern int errno; | |
49 | ||
284f4730 JB |
50 | #ifdef HAVE_X_WINDOWS |
51 | extern Lisp_Object Vmouse_grabbed; | |
52 | ||
53 | /* Make all keyboard buffers much bigger when using X windows. */ | |
54 | #define KBD_BUFFER_SIZE 4096 | |
55 | #else /* No X-windows, character input */ | |
56 | #define KBD_BUFFER_SIZE 256 | |
57 | #endif /* No X-windows */ | |
58 | ||
59 | /* Following definition copied from eval.c */ | |
60 | ||
61 | struct backtrace | |
62 | { | |
63 | struct backtrace *next; | |
64 | Lisp_Object *function; | |
65 | Lisp_Object *args; /* Points to vector of args. */ | |
66 | int nargs; /* length of vector. If nargs is UNEVALLED, | |
67 | args points to slot holding list of | |
68 | unevalled args */ | |
69 | char evalargs; | |
70 | }; | |
71 | ||
72 | /* Non-nil disable property on a command means | |
73 | do not execute it; call disabled-command-hook's value instead. */ | |
74 | Lisp_Object Qdisabled, Vdisabled_command_hook; | |
75 | ||
76 | #define NUM_RECENT_KEYS (100) | |
77 | int recent_keys_index; /* Index for storing next element into recent_keys */ | |
78 | int total_keys; /* Total number of elements stored into recent_keys */ | |
79 | Lisp_Object recent_keys[NUM_RECENT_KEYS]; /* Holds last 100 keystrokes */ | |
80 | ||
81 | /* Buffer holding the key that invoked the current command. */ | |
82 | Lisp_Object *this_command_keys; | |
83 | int this_command_key_count; /* Size in use. */ | |
84 | int this_command_keys_size; /* Size allocated. */ | |
85 | ||
86 | extern int minbuf_level; | |
87 | ||
88 | extern struct backtrace *backtrace_list; | |
89 | ||
90 | /* Nonzero means do menu prompting. */ | |
91 | static int menu_prompting; | |
92 | ||
93 | /* Character to see next line of menu prompt. */ | |
94 | static Lisp_Object menu_prompt_more_char; | |
95 | ||
96 | /* For longjmp to where kbd input is being done. */ | |
97 | static jmp_buf getcjmp; | |
98 | ||
99 | /* True while doing kbd input. */ | |
100 | int waiting_for_input; | |
101 | ||
102 | /* True while displaying for echoing. Delays C-g throwing. */ | |
103 | static int echoing; | |
104 | ||
105 | /* Nonzero means C-G should cause immediate error-signal. */ | |
106 | int immediate_quit; | |
107 | ||
108 | /* Character to recognize as the help char. */ | |
109 | Lisp_Object help_char; | |
110 | ||
111 | /* Form to execute when help char is typed. */ | |
112 | Lisp_Object Vhelp_form; | |
113 | ||
114 | /* Character that causes a quit. Normally C-g. | |
115 | ||
116 | If we are running on an ordinary terminal, this must be an ordinary | |
117 | ASCII char, since we want to make it our interrupt character. | |
118 | ||
119 | If we are not running on an ordinary terminal, it still needs to be | |
120 | an ordinary ASCII char. This character needs to be recognized in | |
121 | the input interrupt handler. At this point, the keystroke is | |
122 | represented as a struct input_event, while the desired quit | |
123 | character is specified as a lispy event. The mapping from struct | |
124 | input_events to lispy events cannot run in an interrupt handler, | |
125 | and the reverse mapping is difficult for anything but ASCII | |
126 | keystrokes. | |
127 | ||
128 | FOR THESE ELABORATE AND UNSATISFYING REASONS, quit_char must be an | |
129 | ASCII character. */ | |
130 | int quit_char; | |
131 | ||
132 | extern Lisp_Object current_global_map; | |
133 | extern int minibuf_level; | |
134 | ||
135 | /* Current depth in recursive edits. */ | |
136 | int command_loop_level; | |
137 | ||
138 | /* Total number of times command_loop has read a key sequence. */ | |
139 | int num_input_keys; | |
140 | ||
141 | /* Last input character read as a command. */ | |
142 | Lisp_Object last_command_char; | |
143 | ||
144 | /* Last input character read for any purpose. */ | |
145 | Lisp_Object last_input_char; | |
146 | ||
147 | /* If not Qnil, an object to be read as the next command input. */ | |
148 | Lisp_Object unread_command_char; | |
149 | ||
150 | /* Char to use as prefix when a meta character is typed in. | |
151 | This is bound on entry to minibuffer in case ESC is changed there. */ | |
152 | ||
153 | Lisp_Object meta_prefix_char; | |
154 | ||
155 | /* Last size recorded for a current buffer which is not a minibuffer. */ | |
156 | static int last_non_minibuf_size; | |
157 | ||
06ef7355 | 158 | /* Number of idle seconds before an auto-save and garbage collection. */ |
284f4730 JB |
159 | static Lisp_Object Vauto_save_timeout; |
160 | ||
161 | /* Total number of times read_char has returned. */ | |
162 | int num_input_chars; | |
163 | ||
164 | /* Auto-save automatically when this many characters have been typed | |
165 | since the last time. */ | |
166 | ||
167 | static int auto_save_interval; | |
168 | ||
169 | /* Value of num_input_chars as of last auto save. */ | |
170 | ||
171 | int last_auto_save; | |
172 | ||
173 | /* Last command executed by the editor command loop, not counting | |
174 | commands that set the prefix argument. */ | |
175 | ||
176 | Lisp_Object last_command; | |
177 | ||
178 | /* The command being executed by the command loop. | |
179 | Commands may set this, and the value set will be copied into last_command | |
180 | instead of the actual command. */ | |
181 | Lisp_Object this_command; | |
182 | ||
183 | #ifndef HAVE_X11 | |
184 | /* Window of last mouse click. */ | |
185 | extern Lisp_Object Vmouse_window; | |
186 | ||
187 | /* List containing details of last mouse click. */ | |
188 | extern Lisp_Object Vmouse_event; | |
189 | #endif /* defined HAVE_X11 */ | |
190 | ||
191 | /* Hook to call on each mouse event after running its definition. */ | |
192 | Lisp_Object Vmouse_event_function; | |
193 | ||
194 | /* Hook to call when mouse leaves screen. */ | |
195 | Lisp_Object Vmouse_left_hook; | |
196 | ||
197 | /* Hook to call when a screen is mapped. */ | |
198 | Lisp_Object Vmap_screen_hook; | |
199 | ||
200 | /* Hook to call when a screen is unmapped. */ | |
201 | Lisp_Object Vunmap_screen_hook; | |
202 | ||
203 | /* Handler for non-grabbed (no keys depressed) mouse motion. */ | |
204 | Lisp_Object Vmouse_motion_handler; | |
205 | ||
206 | /* The screen in which the last input event occurred. | |
207 | command_loop_1 will select this screen before running the | |
208 | command bound to an event sequence, and read_key_sequence will | |
209 | toss the existing prefix if the user starts typing at a | |
210 | new screen. */ | |
211 | Lisp_Object Vlast_event_screen; | |
212 | ||
213 | /* X Windows wants this for selection ownership. */ | |
214 | unsigned long last_event_timestamp; | |
215 | ||
216 | Lisp_Object Qself_insert_command; | |
217 | Lisp_Object Qforward_char; | |
218 | Lisp_Object Qbackward_char; | |
219 | ||
220 | /* read_key_sequence stores here the command definition of the | |
221 | key sequence that it reads. */ | |
222 | Lisp_Object read_key_sequence_cmd; | |
223 | ||
224 | /* Form to evaluate (if non-nil) when Emacs is started. */ | |
225 | Lisp_Object Vtop_level; | |
226 | ||
227 | /* User-supplied string to translate input characters through. */ | |
228 | Lisp_Object Vkeyboard_translate_table; | |
229 | ||
230 | /* Keymap mapping ASCII function key sequences onto their preferred forms. */ | |
231 | extern Lisp_Object Vfunction_key_map; | |
232 | ||
233 | /* File in which we write all commands we read. */ | |
234 | FILE *dribble; | |
235 | ||
236 | /* Nonzero if input is available. */ | |
237 | int input_pending; | |
238 | ||
239 | /* Nonzero if should obey 0200 bit in input chars as "Meta". */ | |
240 | int meta_key; | |
241 | ||
242 | extern char *pending_malloc_warning; | |
243 | ||
244 | /* Circular buffer for pre-read keyboard input. */ | |
245 | static struct input_event kbd_buffer[KBD_BUFFER_SIZE]; | |
246 | ||
247 | /* Pointer to next available character in kbd_buffer. | |
248 | If kbd_fetch_ptr == kbd_store_ptr, the buffer is empty. | |
249 | This may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the the | |
250 | next available char is in kbd_buffer[0]. */ | |
251 | static struct input_event *kbd_fetch_ptr; | |
252 | ||
253 | /* Pointer to next place to store character in kbd_buffer. This | |
254 | may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the next | |
255 | character should go in kbd_buffer[0]. */ | |
256 | static struct input_event *kbd_store_ptr; | |
257 | ||
258 | /* The above pair of variables forms a "queue empty" flag. When we | |
259 | enqueue a non-hook event, we increment kbd_write_count. When we | |
260 | dequeue a non-hook event, we increment kbd_read_count. We say that | |
261 | there is input available iff the two counters are equal. | |
262 | ||
263 | Why not just have a flag set and cleared by the enqueuing and | |
264 | dequeuing functions? Such a flag could be screwed up by interrupts | |
265 | at inopportune times. */ | |
266 | ||
267 | /* If this flag is non-zero, mouse movement events will appear in the | |
268 | input stream. If is zero, mouse movement will be ignored. */ | |
269 | int do_mouse_tracking; | |
270 | ||
271 | /* The window system handling code should set this if the mouse has | |
272 | moved since the last call to the mouse_position_hook. Calling that | |
273 | hook should clear this. Code assumes that if this is set, it can | |
274 | call mouse_position_hook to get the promised position, so don't set | |
275 | it unless you're prepared to substantiate the claim! */ | |
276 | int mouse_moved; | |
277 | ||
278 | /* True iff there is an event in kbd_buffer, or if mouse tracking is | |
279 | enabled and there is a new mouse position in the mouse movement | |
280 | buffer. Note that if this is false, that doesn't mean that there | |
281 | is readable input; all the events in the queue might be button-up | |
282 | events, and do_mouse_tracking might be off. */ | |
283 | #define EVENT_QUEUES_EMPTY \ | |
284 | ((kbd_fetch_ptr == kbd_store_ptr) && (!do_mouse_tracking || !mouse_moved)) | |
285 | ||
286 | ||
287 | /* Symbols to head events. */ | |
288 | Lisp_Object Qmouse_movement; | |
289 | ||
290 | Lisp_Object Qvscrollbar_part; | |
291 | Lisp_Object Qvslider_part; | |
292 | Lisp_Object Qvthumbup_part; | |
293 | Lisp_Object Qvthumbdown_part; | |
294 | ||
295 | Lisp_Object Qhscrollbar_part; | |
296 | Lisp_Object Qhslider_part; | |
297 | Lisp_Object Qhthumbleft_part; | |
298 | Lisp_Object Qhthumbright_part; | |
299 | ||
300 | /* Symbols to denote kinds of events. */ | |
301 | Lisp_Object Qfunction_key; | |
302 | Lisp_Object Qmouse_click; | |
303 | /* Lisp_Object Qmouse_movement; - also an event header */ | |
304 | Lisp_Object Qscrollbar_click; | |
305 | ||
306 | /* Properties of event headers. */ | |
307 | Lisp_Object Qevent_kind; | |
308 | Lisp_Object Qevent_unmodified; | |
309 | ||
310 | /* Symbols to use for non-text mouse positions. */ | |
311 | Lisp_Object Qmode_line; | |
312 | Lisp_Object Qvertical_split; | |
313 | ||
314 | ||
ffd56f97 JB |
315 | /* Address (if not 0) of EMACS_TIME to zero out if a SIGIO interrupt |
316 | happens. */ | |
317 | EMACS_TIME *input_available_clear_time; | |
284f4730 JB |
318 | |
319 | /* Nonzero means use SIGIO interrupts; zero means use CBREAK mode. | |
320 | Default is 1 if INTERRUPT_INPUT is defined. */ | |
321 | int interrupt_input; | |
322 | ||
323 | /* Nonzero while interrupts are temporarily deferred during redisplay. */ | |
324 | int interrupts_deferred; | |
325 | ||
326 | /* nonzero means use ^S/^Q for flow control. */ | |
327 | int flow_control; | |
328 | ||
284f4730 JB |
329 | /* Allow m- file to inhibit use of FIONREAD. */ |
330 | #ifdef BROKEN_FIONREAD | |
331 | #undef FIONREAD | |
332 | #endif | |
333 | ||
334 | /* We are unable to use interrupts if FIONREAD is not available, | |
335 | so flush SIGIO so we won't try. */ | |
336 | #ifndef FIONREAD | |
337 | #ifdef SIGIO | |
338 | #undef SIGIO | |
339 | #endif | |
340 | #endif | |
341 | ||
342 | /* If we support X Windows, and won't get an interrupt when input | |
343 | arrives from the server, poll periodically so we can detect C-g. */ | |
344 | #ifdef HAVE_X_WINDOWS | |
345 | #ifndef SIGIO | |
346 | #define POLL_FOR_INPUT | |
347 | #endif | |
348 | #endif | |
349 | \f | |
350 | /* Global variable declarations. */ | |
351 | ||
352 | /* Function for init_keyboard to call with no args (if nonzero). */ | |
353 | void (*keyboard_init_hook) (); | |
354 | ||
355 | static int read_avail_input (); | |
356 | static void get_input_pending (); | |
357 | ||
358 | /* > 0 if we are to echo keystrokes. */ | |
359 | static int echo_keystrokes; | |
360 | ||
361 | /* Nonzero means echo each character as typed. */ | |
362 | static int immediate_echo; | |
363 | ||
364 | /* The text we're echoing in the modeline - partial key sequences, | |
365 | usually. '\0'-terminated. */ | |
366 | static char echobuf[100]; | |
367 | ||
368 | /* Where to append more text to echobuf if we want to. */ | |
369 | static char *echoptr; | |
370 | ||
371 | #define min(a,b) ((a)<(b)?(a):(b)) | |
372 | #define max(a,b) ((a)>(b)?(a):(b)) | |
373 | ||
374 | /* Install the string STR as the beginning of the string of echoing, | |
375 | so that it serves as a prompt for the next character. | |
376 | Also start echoing. */ | |
377 | ||
378 | echo_prompt (str) | |
379 | char *str; | |
380 | { | |
381 | int len = strlen (str); | |
382 | if (len > sizeof echobuf - 4) | |
383 | len = sizeof echobuf - 4; | |
384 | bcopy (str, echobuf, len + 1); | |
385 | echoptr = echobuf + len; | |
386 | ||
387 | echo (); | |
388 | } | |
389 | ||
390 | /* Add C to the echo string, if echoing is going on. | |
391 | C can be a character, which is printed prettily ("M-C-x" and all that | |
392 | jazz), or a symbol, whose name is printed. */ | |
393 | ||
394 | echo_char (c) | |
395 | Lisp_Object c; | |
396 | { | |
397 | extern char *push_key_description (); | |
398 | ||
399 | if (immediate_echo) | |
400 | { | |
401 | char *ptr = echoptr; | |
402 | ||
403 | if (ptr != echobuf) | |
404 | *ptr++ = ' '; | |
405 | ||
406 | /* If someone has passed us a composite event, use its head symbol. */ | |
407 | if (EVENT_HAS_PARAMETERS (c)) | |
408 | c = EVENT_HEAD (c); | |
409 | ||
410 | if (XTYPE (c) == Lisp_Int) | |
411 | { | |
412 | if (ptr - echobuf > sizeof echobuf - 6) | |
413 | return; | |
414 | ||
415 | ptr = push_key_description (c, ptr); | |
416 | } | |
417 | else if (XTYPE (c) == Lisp_Symbol) | |
418 | { | |
419 | struct Lisp_String *name = XSYMBOL (c)->name; | |
420 | if (((ptr - echobuf) + name->size + 4) > sizeof echobuf) | |
421 | return; | |
422 | bcopy (name->data, ptr, name->size); | |
423 | ptr += name->size; | |
424 | } | |
425 | ||
426 | if (echoptr == echobuf && c == help_char) | |
427 | { | |
428 | strcpy (ptr, " (Type ? for further options)"); | |
429 | ptr += strlen (ptr); | |
430 | } | |
431 | ||
432 | *ptr = 0; | |
433 | echoptr = ptr; | |
434 | ||
435 | echo (); | |
436 | } | |
437 | } | |
438 | ||
439 | /* Temporarily add a dash to the end of the echo string if it's not | |
440 | empty, so that it serves as a mini-prompt for the very next character. */ | |
441 | ||
442 | echo_dash () | |
443 | { | |
444 | if (!immediate_echo && echoptr == echobuf) | |
445 | return; | |
446 | ||
447 | /* Put a dash at the end of the buffer temporarily, | |
448 | but make it go away when the next character is added. */ | |
449 | echoptr[0] = '-'; | |
450 | echoptr[1] = 0; | |
451 | ||
452 | echo (); | |
453 | } | |
454 | ||
455 | /* Display the current echo string, and begin echoing if not already | |
456 | doing so. */ | |
457 | ||
458 | echo () | |
459 | { | |
460 | if (!immediate_echo) | |
461 | { | |
462 | int i; | |
463 | immediate_echo = 1; | |
464 | ||
465 | for (i = 0; i < this_command_key_count; i++) | |
466 | echo_char (this_command_keys[i]); | |
467 | echo_dash (); | |
468 | } | |
469 | ||
470 | echoing = 1; | |
471 | message1 (echobuf); | |
472 | echoing = 0; | |
473 | ||
474 | if (waiting_for_input && !NILP (Vquit_flag)) | |
475 | quit_throw_to_read_char (); | |
476 | } | |
477 | ||
478 | /* Turn off echoing, for the start of a new command. */ | |
479 | ||
480 | cancel_echoing () | |
481 | { | |
482 | immediate_echo = 0; | |
483 | echoptr = echobuf; | |
484 | } | |
485 | ||
486 | /* Return the length of the current echo string. */ | |
487 | ||
488 | static int | |
489 | echo_length () | |
490 | { | |
491 | return echoptr - echobuf; | |
492 | } | |
493 | ||
494 | /* Truncate the current echo message to its first LEN chars. | |
495 | This and echo_char get used by read_key_sequence when the user | |
496 | switches screens while entering a key sequence. */ | |
497 | ||
498 | static void | |
499 | echo_truncate (len) | |
500 | int len; | |
501 | { | |
502 | echobuf[len] = '\0'; | |
503 | echoptr = echobuf + strlen (echobuf); | |
504 | } | |
505 | ||
506 | \f | |
507 | /* Functions for manipulating this_command_keys. */ | |
508 | static void | |
509 | add_command_key (key) | |
510 | Lisp_Object key; | |
511 | { | |
512 | if (this_command_key_count == this_command_keys_size) | |
513 | { | |
514 | this_command_keys_size *= 2; | |
515 | this_command_keys | |
516 | = (Lisp_Object *) xrealloc (this_command_keys, | |
517 | (this_command_keys_size | |
518 | * sizeof (Lisp_Object))); | |
519 | } | |
520 | this_command_keys[this_command_key_count++] = key; | |
521 | } | |
522 | \f | |
523 | Lisp_Object | |
524 | recursive_edit_1 () | |
525 | { | |
526 | int count = specpdl_ptr - specpdl; | |
527 | Lisp_Object val; | |
528 | ||
529 | if (command_loop_level > 0) | |
530 | { | |
531 | specbind (Qstandard_output, Qt); | |
532 | specbind (Qstandard_input, Qt); | |
533 | } | |
534 | ||
535 | val = command_loop (); | |
536 | if (EQ (val, Qt)) | |
537 | Fsignal (Qquit, Qnil); | |
538 | ||
539 | unbind_to (count); | |
540 | return Qnil; | |
541 | } | |
542 | ||
543 | /* When an auto-save happens, record the "time", and don't do again soon. */ | |
544 | record_auto_save () | |
545 | { | |
546 | last_auto_save = num_input_chars; | |
547 | } | |
548 | \f | |
549 | Lisp_Object recursive_edit_unwind (), command_loop (); | |
550 | ||
551 | DEFUN ("recursive-edit", Frecursive_edit, Srecursive_edit, 0, 0, "", | |
552 | "Invoke the editor command loop recursively.\n\ | |
553 | To get out of the recursive edit, a command can do `(throw 'exit nil)';\n\ | |
554 | that tells this function to return.\n\ | |
555 | Alternately, `(throw 'exit t)' makes this function signal an error.\n\ | |
556 | This function is called by the editor initialization to begin editing.") | |
557 | () | |
558 | { | |
559 | int count = specpdl_ptr - specpdl; | |
560 | Lisp_Object val; | |
561 | ||
562 | command_loop_level++; | |
563 | update_mode_lines = 1; | |
564 | ||
565 | record_unwind_protect (recursive_edit_unwind, | |
566 | (command_loop_level | |
567 | && current_buffer != XBUFFER (XWINDOW (selected_window)->buffer)) | |
568 | ? Fcurrent_buffer () | |
569 | : Qnil); | |
570 | recursive_edit_1 (); | |
571 | return unbind_to (count, Qnil); | |
572 | } | |
573 | ||
574 | Lisp_Object | |
575 | recursive_edit_unwind (buffer) | |
576 | Lisp_Object buffer; | |
577 | { | |
578 | if (!NILP (buffer)) | |
579 | Fset_buffer (buffer); | |
580 | ||
581 | command_loop_level--; | |
582 | update_mode_lines = 1; | |
583 | return Qnil; | |
584 | } | |
585 | \f | |
586 | Lisp_Object | |
587 | cmd_error (data) | |
588 | Lisp_Object data; | |
589 | { | |
590 | Lisp_Object errmsg, tail, errname, file_error; | |
591 | Lisp_Object stream; | |
592 | struct gcpro gcpro1; | |
593 | int i; | |
594 | ||
595 | Vquit_flag = Qnil; | |
596 | Vinhibit_quit = Qt; | |
597 | Vstandard_output = Qt; | |
598 | Vstandard_input = Qt; | |
599 | Vexecuting_macro = Qnil; | |
600 | echo_area_glyphs = 0; | |
601 | ||
602 | /* If the window system or terminal screen hasn't been initialized | |
603 | yet, or we're not interactive, it's best to dump this message out | |
604 | to stderr and exit. */ | |
605 | if (! SCREEN_MESSAGE_BUF (selected_screen) | |
606 | || noninteractive) | |
607 | stream = Qexternal_debugging_output; | |
608 | else | |
609 | { | |
610 | Fdiscard_input (); | |
611 | bitch_at_user (); | |
612 | stream = Qt; | |
613 | } | |
614 | ||
615 | errname = Fcar (data); | |
616 | ||
617 | if (EQ (errname, Qerror)) | |
618 | { | |
619 | data = Fcdr (data); | |
620 | if (!CONSP (data)) data = Qnil; | |
621 | errmsg = Fcar (data); | |
622 | file_error = Qnil; | |
623 | } | |
624 | else | |
625 | { | |
626 | errmsg = Fget (errname, Qerror_message); | |
627 | file_error = Fmemq (Qfile_error, | |
628 | Fget (errname, Qerror_conditions)); | |
629 | } | |
630 | ||
631 | /* Print an error message including the data items. | |
632 | This is done by printing it into a scratch buffer | |
633 | and then making a copy of the text in the buffer. */ | |
634 | ||
635 | if (!CONSP (data)) data = Qnil; | |
636 | tail = Fcdr (data); | |
637 | GCPRO1 (tail); | |
638 | ||
639 | /* For file-error, make error message by concatenating | |
640 | all the data items. They are all strings. */ | |
641 | if (!NILP (file_error) && !NILP (tail)) | |
642 | errmsg = XCONS (tail)->car, tail = XCONS (tail)->cdr; | |
643 | ||
644 | if (XTYPE (errmsg) == Lisp_String) | |
645 | Fprinc (errmsg, stream); | |
646 | else | |
647 | write_string_1 ("peculiar error", -1, stream); | |
648 | ||
649 | for (i = 0; CONSP (tail); tail = Fcdr (tail), i++) | |
650 | { | |
651 | write_string_1 (i ? ", " : ": ", 2, stream); | |
652 | if (!NILP (file_error)) | |
653 | Fprinc (Fcar (tail), stream); | |
654 | else | |
655 | Fprin1 (Fcar (tail), stream); | |
656 | } | |
657 | UNGCPRO; | |
658 | ||
659 | /* If the window system or terminal screen hasn't been initialized | |
660 | yet, or we're in -batch mode, this error should cause Emacs to exit. */ | |
661 | if (! SCREEN_MESSAGE_BUF (selected_screen) | |
662 | || noninteractive) | |
663 | { | |
664 | Fterpri (stream); | |
665 | Fkill_emacs (make_number (-1)); | |
666 | } | |
667 | ||
668 | Vquit_flag = Qnil; | |
669 | ||
670 | Vinhibit_quit = Qnil; | |
671 | return make_number (0); | |
672 | } | |
673 | \f | |
674 | Lisp_Object command_loop_1 (); | |
675 | Lisp_Object command_loop_2 (); | |
676 | Lisp_Object top_level_1 (); | |
677 | ||
678 | /* Entry to editor-command-loop. | |
679 | This level has the catches for exiting/returning to editor command loop. | |
680 | It returns nil to exit recursive edit, t to abort it. */ | |
681 | ||
682 | Lisp_Object | |
683 | command_loop () | |
684 | { | |
685 | if (command_loop_level > 0 || minibuf_level > 0) | |
686 | { | |
687 | return internal_catch (Qexit, command_loop_2, Qnil); | |
688 | } | |
689 | else | |
690 | while (1) | |
691 | { | |
692 | internal_catch (Qtop_level, top_level_1, Qnil); | |
693 | internal_catch (Qtop_level, command_loop_2, Qnil); | |
694 | ||
695 | /* End of file in -batch run causes exit here. */ | |
696 | if (noninteractive) | |
697 | Fkill_emacs (Qt); | |
698 | } | |
699 | } | |
700 | ||
701 | /* Here we catch errors in execution of commands within the | |
702 | editing loop, and reenter the editing loop. | |
703 | When there is an error, cmd_error runs and returns a non-nil | |
704 | value to us. A value of nil means that cmd_loop_1 itself | |
705 | returned due to end of file (or end of kbd macro). */ | |
706 | ||
707 | Lisp_Object | |
708 | command_loop_2 () | |
709 | { | |
710 | register Lisp_Object val; | |
711 | ||
712 | do | |
713 | val = internal_condition_case (command_loop_1, Qerror, cmd_error); | |
714 | while (!NILP (val)); | |
715 | ||
716 | return Qnil; | |
717 | } | |
718 | ||
719 | Lisp_Object | |
720 | top_level_2 () | |
721 | { | |
722 | return Feval (Vtop_level); | |
723 | } | |
724 | ||
725 | Lisp_Object | |
726 | top_level_1 () | |
727 | { | |
728 | /* On entry to the outer level, run the startup file */ | |
729 | if (!NILP (Vtop_level)) | |
730 | internal_condition_case (top_level_2, Qerror, cmd_error); | |
731 | else if (!NILP (Vpurify_flag)) | |
732 | message ("Bare impure Emacs (standard Lisp code not loaded)"); | |
733 | else | |
734 | message ("Bare Emacs (standard Lisp code not loaded)"); | |
735 | return Qnil; | |
736 | } | |
737 | ||
738 | DEFUN ("top-level", Ftop_level, Stop_level, 0, 0, "", | |
739 | "Exit all recursive editing levels.") | |
740 | () | |
741 | { | |
742 | Fthrow (Qtop_level, Qnil); | |
743 | } | |
744 | ||
745 | DEFUN ("exit-recursive-edit", Fexit_recursive_edit, Sexit_recursive_edit, 0, 0, "", | |
746 | "Exit from the innermost recursive edit or minibuffer.") | |
747 | () | |
748 | { | |
749 | if (command_loop_level > 0 || minibuf_level > 0) | |
750 | Fthrow (Qexit, Qnil); | |
751 | ||
752 | error ("No recursive edit is in progress"); | |
753 | } | |
754 | ||
755 | DEFUN ("abort-recursive-edit", Fabort_recursive_edit, Sabort_recursive_edit, 0, 0, "", | |
756 | "Abort the command that requested this recursive edit or minibuffer input.") | |
757 | () | |
758 | { | |
759 | if (command_loop_level > 0 || minibuf_level > 0) | |
760 | Fthrow (Qexit, Qt); | |
761 | ||
762 | error ("No recursive edit is in progress"); | |
763 | } | |
764 | \f | |
765 | /* This is the actual command reading loop, | |
766 | sans error-handling encapsulation. */ | |
767 | ||
768 | Lisp_Object Fcommand_execute (); | |
769 | static int read_key_sequence (); | |
770 | ||
771 | Lisp_Object | |
772 | command_loop_1 () | |
773 | { | |
774 | Lisp_Object cmd; | |
775 | int lose; | |
776 | int nonundocount; | |
777 | Lisp_Object keybuf[30]; | |
778 | int i; | |
779 | int no_redisplay; | |
780 | int no_direct; | |
781 | ||
782 | Vprefix_arg = Qnil; | |
783 | waiting_for_input = 0; | |
784 | cancel_echoing (); | |
785 | ||
786 | /* Don't clear out last_command at the beginning of a macro. */ | |
787 | if (XTYPE (Vexecuting_macro) != Lisp_String) | |
788 | last_command = Qt; | |
789 | ||
790 | nonundocount = 0; | |
791 | no_redisplay = 0; | |
792 | this_command_key_count = 0; | |
793 | ||
794 | while (1) | |
795 | { | |
796 | /* Install chars successfully executed in kbd macro. */ | |
797 | ||
798 | if (defining_kbd_macro && NILP (Vprefix_arg)) | |
799 | finalize_kbd_macro_chars (); | |
800 | ||
801 | /* Make sure the current window's buffer is selected. */ | |
802 | if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) | |
803 | set_buffer_internal (XBUFFER (XWINDOW (selected_window)->buffer)); | |
804 | ||
805 | /* Display any malloc warning that just came out. Use while because | |
806 | displaying one warning can cause another. */ | |
807 | ||
808 | while (pending_malloc_warning) | |
809 | display_malloc_warning (); | |
810 | ||
811 | no_direct = 0; | |
812 | ||
813 | /* If minibuffer on and echo area in use, | |
814 | wait 2 sec and redraw minibufer. */ | |
815 | ||
816 | if (minibuf_level && echo_area_glyphs) | |
817 | { | |
818 | Fsit_for (make_number (2), Qnil, Qnil); | |
819 | echo_area_glyphs = 0; | |
820 | no_direct = 1; | |
821 | if (!NILP (Vquit_flag)) | |
822 | { | |
823 | Vquit_flag = Qnil; | |
824 | unread_command_char = make_number (quit_char); | |
825 | } | |
826 | } | |
827 | ||
828 | #ifdef C_ALLOCA | |
829 | alloca (0); /* Cause a garbage collection now */ | |
830 | /* Since we can free the most stuff here. */ | |
831 | #endif /* C_ALLOCA */ | |
832 | ||
833 | /* Read next key sequence; i gets its length. */ | |
834 | i = read_key_sequence (keybuf, (sizeof keybuf / sizeof (keybuf[0])), 0); | |
835 | ||
836 | ++num_input_keys; | |
837 | ||
838 | #ifdef MULTI_SCREEN | |
839 | /* Select the screen that the key sequence came from. */ | |
840 | if (XTYPE (Vlast_event_screen) == Lisp_Screen | |
841 | && XSCREEN (Vlast_event_screen) != selected_screen) | |
842 | Fselect_screen (Vlast_event_screen, Qnil); | |
843 | #endif | |
844 | ||
845 | /* Now we have read a key sequence of length I, | |
846 | or else I is 0 and we found end of file. */ | |
847 | ||
848 | if (i == 0) /* End of file -- happens only in */ | |
849 | return Qnil; /* a kbd macro, at the end. */ | |
850 | ||
851 | #if 0 | |
852 | #ifdef HAVE_X_WINDOWS | |
853 | if (SCREEN_IS_X (selected_screen)) | |
854 | { | |
855 | if (i == -1) /* Mouse event */ | |
856 | { | |
857 | nonundocount = 0; | |
858 | if (NILP (Vprefix_arg) && NILP (Vexecuting_macro) && | |
859 | !EQ (minibuf_window, selected_window)) | |
860 | Fundo_boundary (); | |
861 | ||
862 | if (defining_kbd_macro) | |
863 | { | |
864 | /* Be nice if this worked... */ | |
865 | } | |
866 | Fexecute_mouse_event (read_key_sequence_cmd); | |
867 | no_redisplay = 0; | |
868 | goto directly_done; | |
869 | } | |
870 | ||
871 | if (i == -2) /* Lisp Symbol */ | |
872 | { | |
873 | nonundocount = 0; | |
874 | if (NILP (Vprefix_arg) && NILP (Vexecuting_macro) && | |
875 | !EQ (minibuf_window, selected_window)) | |
876 | Fundo_boundary (); | |
877 | ||
878 | goto directly_done; | |
879 | } | |
880 | } | |
881 | #endif /* HAVE_X_WINDOWS */ | |
882 | #endif | |
883 | ||
884 | last_command_char = keybuf[i - 1]; | |
885 | ||
886 | cmd = read_key_sequence_cmd; | |
887 | if (!NILP (Vexecuting_macro)) | |
888 | { | |
889 | if (!NILP (Vquit_flag)) | |
890 | { | |
891 | Vexecuting_macro = Qt; | |
892 | QUIT; /* Make some noise. */ | |
893 | /* Will return since macro now empty. */ | |
894 | } | |
895 | } | |
896 | ||
897 | /* Do redisplay processing after this command except in special | |
898 | cases identified below that set no_redisplay to 1. */ | |
899 | no_redisplay = 0; | |
900 | ||
901 | /* Execute the command. */ | |
902 | ||
903 | if (NILP (cmd)) | |
904 | { | |
905 | /* nil means key is undefined. */ | |
906 | bitch_at_user (); | |
907 | defining_kbd_macro = 0; | |
908 | update_mode_lines = 1; | |
909 | Vprefix_arg = Qnil; | |
910 | } | |
911 | else | |
912 | { | |
913 | this_command = cmd; | |
914 | if (NILP (Vprefix_arg) && ! no_direct) | |
915 | { | |
916 | /* Recognize some common commands in common situations and | |
917 | do them directly. */ | |
918 | if (EQ (cmd, Qforward_char) && point < ZV) | |
919 | { | |
920 | struct Lisp_Vector *dp | |
921 | = window_display_table (XWINDOW (selected_window)); | |
922 | lose = FETCH_CHAR (point); | |
923 | SET_PT (point + 1); | |
924 | if (((dp == 0 && lose >= 040 && lose < 0177) | |
925 | || | |
926 | (dp && (XTYPE (dp->contents[lose]) != Lisp_String | |
927 | || XSTRING (dp->contents[lose])->size == sizeof (GLYPH)))) | |
284f4730 JB |
928 | && (XFASTINT (XWINDOW (selected_window)->last_modified) |
929 | >= MODIFF) | |
930 | && (XFASTINT (XWINDOW (selected_window)->last_point) | |
931 | == point - 1) | |
932 | && !windows_or_buffers_changed | |
933 | && EQ (current_buffer->selective_display, Qnil) | |
934 | && !detect_input_pending () | |
935 | && NILP (Vexecuting_macro)) | |
936 | no_redisplay = direct_output_forward_char (1); | |
937 | goto directly_done; | |
938 | } | |
939 | else if (EQ (cmd, Qbackward_char) && point > BEGV) | |
940 | { | |
941 | struct Lisp_Vector *dp | |
942 | = window_display_table (XWINDOW (selected_window)); | |
943 | SET_PT (point - 1); | |
944 | lose = FETCH_CHAR (point); | |
945 | if (((dp == 0 && lose >= 040 && lose < 0177) | |
946 | || | |
947 | (dp && (XTYPE (dp->contents[lose]) != Lisp_String | |
948 | || XSTRING (dp->contents[lose])->size == sizeof (GLYPH)))) | |
284f4730 JB |
949 | && (XFASTINT (XWINDOW (selected_window)->last_modified) |
950 | >= MODIFF) | |
951 | && (XFASTINT (XWINDOW (selected_window)->last_point) | |
952 | == point + 1) | |
953 | && !windows_or_buffers_changed | |
954 | && EQ (current_buffer->selective_display, Qnil) | |
955 | && !detect_input_pending () | |
956 | && NILP (Vexecuting_macro)) | |
957 | no_redisplay = direct_output_forward_char (-1); | |
958 | goto directly_done; | |
959 | } | |
960 | else if (EQ (cmd, Qself_insert_command) | |
961 | /* Try this optimization only on ascii keystrokes. */ | |
962 | && XTYPE (last_command_char) == Lisp_Int) | |
963 | { | |
964 | unsigned char c = XINT (last_command_char); | |
965 | ||
966 | if (NILP (Vexecuting_macro) && | |
967 | !EQ (minibuf_window, selected_window)) | |
968 | { | |
969 | if (!nonundocount || nonundocount >= 20) | |
970 | { | |
971 | Fundo_boundary (); | |
972 | nonundocount = 0; | |
973 | } | |
974 | nonundocount++; | |
975 | } | |
976 | lose = (XFASTINT (XWINDOW (selected_window)->last_modified) | |
977 | < MODIFF) | |
978 | || (XFASTINT (XWINDOW (selected_window)->last_point) | |
979 | != point) | |
980 | || MODIFF <= current_buffer->save_modified | |
981 | || windows_or_buffers_changed | |
982 | || !EQ (current_buffer->selective_display, Qnil) | |
983 | || detect_input_pending () | |
984 | || !NILP (Vexecuting_macro); | |
985 | if (internal_self_insert (c, 0)) | |
986 | { | |
987 | lose = 1; | |
988 | nonundocount = 0; | |
989 | } | |
990 | if (!lose && | |
991 | (point == ZV || FETCH_CHAR (point) == '\n')) | |
992 | { | |
993 | struct Lisp_Vector *dp | |
994 | = window_display_table (XWINDOW (selected_window)); | |
995 | ||
996 | if (dp == 0 || XTYPE (dp->contents[c]) != Lisp_String) | |
997 | no_redisplay = direct_output_for_insert (c); | |
998 | else if (XSTRING (dp->contents[c])->size | |
999 | == sizeof (GLYPH)) | |
1000 | no_redisplay = | |
1001 | direct_output_for_insert (*(GLYPH *)XSTRING (dp->contents[c])->data); | |
1002 | } | |
1003 | goto directly_done; | |
1004 | } | |
1005 | } | |
1006 | ||
1007 | /* Here for a command that isn't executed directly */ | |
1008 | ||
1009 | nonundocount = 0; | |
1010 | if (NILP (Vprefix_arg)) | |
1011 | Fundo_boundary (); | |
1012 | Fcommand_execute (cmd, Qnil); | |
1013 | ||
284f4730 | 1014 | } |
a764a753 | 1015 | directly_done: ; |
284f4730 JB |
1016 | |
1017 | /* If there is a prefix argument, | |
1018 | 1) We don't want last_command to be ``universal-argument'' | |
1019 | (that would be dumb), so don't set last_command, | |
1020 | 2) we want to leave echoing on so that the prefix will be | |
1021 | echoed as part of this key sequence, so don't call | |
1022 | cancel_echoing, and | |
1023 | 3) we want to leave this_command_key_count non-zero, so that | |
1024 | read_char will realize that it is re-reading a character, and | |
1025 | not echo it a second time. */ | |
1026 | if (NILP (Vprefix_arg)) | |
1027 | { | |
1028 | last_command = this_command; | |
1029 | cancel_echoing (); | |
1030 | this_command_key_count = 0; | |
1031 | } | |
1032 | } | |
1033 | } | |
1034 | \f | |
1035 | /* Number of seconds between polling for input. */ | |
1036 | int polling_period; | |
1037 | ||
1038 | /* Nonzero means polling for input is temporarily suppresed. */ | |
1039 | int poll_suppress_count; | |
1040 | ||
1041 | #ifdef POLL_FOR_INPUT | |
1042 | int polling_for_input; | |
1043 | ||
1044 | /* Handle an alarm once each second and read pending input | |
1045 | so as to handle a C-g if it comces in. */ | |
1046 | ||
1047 | SIGTYPE | |
1048 | input_poll_signal () | |
1049 | { | |
1050 | #ifdef HAVE_X_WINDOWS | |
1051 | extern int x_input_blocked; | |
1052 | if (x_input_blocked == 0) | |
1053 | #endif | |
1054 | if (!waiting_for_input) | |
1055 | read_avail_input (0); | |
1056 | signal (SIGALRM, input_poll_signal); | |
1057 | alarm (polling_period); | |
1058 | } | |
1059 | ||
1060 | #endif | |
1061 | ||
1062 | /* Begin signals to poll for input, if they are appropriate. | |
1063 | This function is called unconditionally from various places. */ | |
1064 | ||
1065 | start_polling () | |
1066 | { | |
1067 | #ifdef POLL_FOR_INPUT | |
1068 | if (read_socket_hook) | |
1069 | { | |
1070 | poll_suppress_count--; | |
1071 | if (poll_suppress_count == 0) | |
1072 | { | |
1073 | signal (SIGALRM, input_poll_signal); | |
1074 | polling_for_input = 1; | |
1075 | alarm (polling_period); | |
1076 | } | |
1077 | } | |
1078 | #endif | |
1079 | } | |
1080 | ||
1081 | /* Turn off polling. */ | |
1082 | ||
1083 | stop_polling () | |
1084 | { | |
1085 | #ifdef POLL_FOR_INPUT | |
1086 | if (read_socket_hook) | |
1087 | { | |
1088 | if (poll_suppress_count == 0) | |
1089 | { | |
1090 | polling_for_input = 0; | |
1091 | alarm (0); | |
1092 | } | |
1093 | poll_suppress_count++; | |
1094 | } | |
1095 | #endif | |
1096 | } | |
1097 | \f | |
1098 | /* Input of single characters from keyboard */ | |
1099 | ||
1100 | Lisp_Object print_help (); | |
1101 | static Lisp_Object kbd_buffer_get_event (); | |
1102 | ||
1103 | /* read a character from the keyboard; call the redisplay if needed */ | |
1104 | /* commandflag 0 means do not do auto-saving, but do do redisplay. | |
1105 | -1 means do not do redisplay, but do do autosaving. | |
1106 | 1 means do both. */ | |
1107 | ||
1108 | Lisp_Object | |
1109 | read_char (commandflag) | |
1110 | int commandflag; | |
1111 | { | |
1112 | register Lisp_Object c; | |
1113 | int count; | |
1114 | jmp_buf save_jump; | |
1115 | ||
1116 | if (!NILP (unread_command_char)) | |
1117 | { | |
1118 | c = unread_command_char; | |
1119 | unread_command_char = Qnil; | |
1120 | ||
1121 | #if 0 /* We're not handling mouse keys specially anymore. */ | |
1122 | if (!EQ (XTYPE (obj), Lisp_Int)) /* Mouse thing */ | |
1123 | { | |
1124 | num_input_chars++; | |
1125 | last_input_char = 0; | |
1126 | return obj; | |
1127 | } | |
1128 | #endif | |
1129 | ||
1130 | if (this_command_key_count == 0) | |
1131 | goto reread_first; | |
1132 | else | |
1133 | goto reread; | |
1134 | } | |
1135 | ||
1136 | if (!NILP (Vexecuting_macro)) | |
1137 | { | |
1138 | if (executing_macro_index >= Flength (Vexecuting_macro)) | |
1139 | { | |
1140 | XSET (c, Lisp_Int, -1); | |
1141 | return c; | |
1142 | } | |
1143 | ||
1144 | c = Faref (Vexecuting_macro, make_number (executing_macro_index)); | |
1145 | executing_macro_index++; | |
1146 | ||
1147 | goto from_macro; | |
1148 | } | |
1149 | ||
1150 | /* Save outer setjmp data, in case called recursively. */ | |
f76475ad | 1151 | save_getcjmp (save_jump); |
284f4730 JB |
1152 | |
1153 | stop_polling (); | |
1154 | ||
1155 | if (commandflag >= 0 && !input_pending && !detect_input_pending ()) | |
1156 | redisplay (); | |
1157 | ||
1158 | if (_setjmp (getcjmp)) | |
1159 | { | |
1160 | XSET (c, Lisp_Int, quit_char); | |
519a3b65 JB |
1161 | #ifdef MULTI_SCREEN |
1162 | XSET (Vlast_event_screen, Lisp_Screen, selected_screen); | |
1163 | #endif | |
284f4730 | 1164 | |
284f4730 JB |
1165 | goto non_reread; |
1166 | } | |
1167 | ||
1168 | /* Message turns off echoing unless more keystrokes turn it on again. */ | |
1169 | if (echo_area_glyphs && *echo_area_glyphs && echo_area_glyphs != echobuf) | |
1170 | cancel_echoing (); | |
1171 | else | |
1172 | /* If already echoing, continue. */ | |
1173 | echo_dash (); | |
1174 | ||
1175 | /* If in middle of key sequence and minibuffer not active, | |
1176 | start echoing if enough time elapses. */ | |
1177 | if (minibuf_level == 0 && !immediate_echo && this_command_key_count > 0 | |
1178 | && echo_keystrokes > 0 | |
1179 | && (echo_area_glyphs == 0 || *echo_area_glyphs == 0)) | |
1180 | { | |
1181 | Lisp_Object tem0; | |
1182 | ||
f76475ad | 1183 | tem0 = sit_for (echo_keystrokes, 0, 1, 1); |
284f4730 JB |
1184 | if (EQ (tem0, Qt)) |
1185 | echo (); | |
1186 | } | |
1187 | ||
1188 | /* Maybe auto save due to number of keystrokes or idle time. */ | |
1189 | ||
1190 | if (commandflag != 0 | |
1191 | && auto_save_interval > 0 | |
1192 | && num_input_chars - last_auto_save > max (auto_save_interval, 20) | |
1193 | && !detect_input_pending ()) | |
1194 | { | |
1195 | jmp_buf temp; | |
1196 | save_getcjmp (temp); | |
1197 | Fdo_auto_save (Qnil, Qnil); | |
1198 | restore_getcjmp (temp); | |
1199 | } | |
1200 | ||
1201 | /* Slow down auto saves logarithmically in size of current buffer, | |
1202 | and garbage collect while we're at it. */ | |
1203 | { | |
1204 | int delay_level, buffer_size; | |
1205 | ||
1206 | if (! MINI_WINDOW_P (XWINDOW (selected_window))) | |
1207 | last_non_minibuf_size = Z - BEG; | |
1208 | buffer_size = (last_non_minibuf_size >> 8) + 1; | |
1209 | delay_level = 0; | |
1210 | while (buffer_size > 64) | |
1211 | delay_level++, buffer_size -= buffer_size >> 2; | |
1212 | if (delay_level < 4) delay_level = 4; | |
1213 | /* delay_level is 4 for files under around 50k, 7 at 100k, | |
1214 | 9 at 200k, 11 at 300k, and 12 at 500k. It is 15 at 1 meg. */ | |
1215 | ||
1216 | /* Auto save if enough time goes by without input. */ | |
1217 | if (commandflag != 0 | |
1218 | && num_input_chars > last_auto_save | |
1219 | && XTYPE (Vauto_save_timeout) == Lisp_Int | |
1220 | && XINT (Vauto_save_timeout) > 0) | |
1221 | { | |
1222 | Lisp_Object tem0; | |
1223 | int delay = delay_level * XFASTINT (Vauto_save_timeout) / 4; | |
f76475ad | 1224 | tem0 = sit_for (delay, 0, 1, 1); |
284f4730 JB |
1225 | if (EQ (tem0, Qt)) |
1226 | { | |
1227 | jmp_buf temp; | |
1228 | save_getcjmp (temp); | |
1229 | Fdo_auto_save (Qnil, Qnil); | |
1230 | restore_getcjmp (temp); | |
1231 | ||
1232 | /* If we have auto-saved and there is still no input | |
1233 | available, garbage collect if there has been enough | |
1234 | consing going on to make it worthwhile. */ | |
1235 | if (!detect_input_pending () | |
1236 | && consing_since_gc > gc_cons_threshold / 2) | |
1237 | Fgarbage_collect (); | |
1238 | } | |
1239 | } | |
1240 | } | |
1241 | ||
1242 | /* Actually read a character, waiting if necessary. */ | |
1243 | c = kbd_buffer_get_event (); | |
1244 | ||
1245 | if (NILP (c)) | |
1246 | abort (); /* Don't think this can happen. */ | |
1247 | ||
1248 | #if 0 /* I think that all the different kinds of events should be | |
1249 | handled together now... */ | |
1250 | if (XTYPE (c) != Lisp_Int) | |
1251 | { | |
1252 | start_polling (); | |
1253 | return c; | |
1254 | } | |
1255 | c = XINT (obj); | |
1256 | #endif | |
1257 | ||
1258 | /* Terminate Emacs in batch mode if at eof. */ | |
1259 | if (noninteractive && c < 0) | |
1260 | Fkill_emacs (make_number (1)); | |
1261 | ||
1262 | non_reread: | |
1263 | ||
f76475ad | 1264 | restore_getcjmp (save_jump); |
284f4730 JB |
1265 | |
1266 | start_polling (); | |
1267 | ||
1268 | echo_area_glyphs = 0; | |
1269 | ||
1270 | /* Handle things that only apply to characters. */ | |
1271 | if (XTYPE (c) == Lisp_Int) | |
1272 | { | |
1273 | /* If kbd_buffer_get_event gave us an EOF, return that. */ | |
1274 | if (XINT (c) < 0) | |
1275 | return c; | |
1276 | ||
1277 | /* Strip the high bits, and maybe the meta bit too. */ | |
1278 | XSETINT (c, c & (meta_key ? 0377 : 0177)); | |
1279 | ||
1280 | if (XTYPE (Vkeyboard_translate_table) == Lisp_String | |
1281 | && XSTRING (Vkeyboard_translate_table)->size > XINT (c)) | |
1282 | XSETINT (c, XSTRING (Vkeyboard_translate_table)->data[c]); | |
1283 | } | |
1284 | ||
1285 | total_keys++; | |
1286 | recent_keys[recent_keys_index] = c; | |
1287 | if (++recent_keys_index >= (sizeof (recent_keys)/sizeof(recent_keys[0]))) | |
1288 | recent_keys_index = 0; | |
1289 | ||
1290 | /* Write c to the dribble file. If c is a lispy event, write | |
1291 | the event's symbol to the dribble file, in <brackets>. Bleaugh. | |
1292 | If you, dear reader, have a better idea, you've got the source. :-) */ | |
1293 | if (dribble) | |
1294 | { | |
1295 | if (XTYPE (c) == Lisp_Int) | |
1296 | putc (c, dribble); | |
1297 | else | |
1298 | { | |
1299 | Lisp_Object dribblee = c; | |
1300 | ||
1301 | /* If it's a structured event, take the event header. */ | |
1302 | if (EVENT_HAS_PARAMETERS (dribblee)) | |
1303 | dribblee = EVENT_HEAD (dribblee); | |
1304 | ||
1305 | if (XTYPE (c) == Lisp_Symbol) | |
1306 | { | |
1307 | putc ('<', dribble); | |
1308 | fwrite (XSYMBOL (c)->name->data, sizeof (char), | |
1309 | XSYMBOL (c)->name->size, | |
1310 | dribble); | |
1311 | putc ('>', dribble); | |
1312 | } | |
1313 | } | |
1314 | ||
1315 | fflush (dribble); | |
1316 | } | |
1317 | ||
1318 | store_kbd_macro_char (c); | |
1319 | ||
1320 | from_macro: | |
1321 | reread_first: | |
1322 | echo_char (c); | |
1323 | ||
1324 | /* Record this character as part of the current key. */ | |
1325 | add_command_key (c); | |
1326 | ||
1327 | /* Re-reading in the middle of a command */ | |
1328 | reread: | |
1329 | last_input_char = c; | |
1330 | num_input_chars++; | |
1331 | ||
1332 | /* Process the help character specially if enabled */ | |
1333 | if (EQ (c, help_char) && !NILP (Vhelp_form)) | |
1334 | { | |
1335 | Lisp_Object tem0; | |
1336 | count = specpdl_ptr - specpdl; | |
1337 | ||
1338 | record_unwind_protect (Fset_window_configuration, | |
1339 | Fcurrent_window_configuration (Qnil)); | |
1340 | ||
1341 | tem0 = Feval (Vhelp_form); | |
1342 | if (XTYPE (tem0) == Lisp_String) | |
1343 | internal_with_output_to_temp_buffer ("*Help*", print_help, tem0); | |
1344 | ||
1345 | cancel_echoing (); | |
1346 | c = read_char (0); | |
1347 | /* Remove the help from the screen */ | |
1348 | unbind_to (count, Qnil); | |
1349 | redisplay (); | |
1350 | if (EQ (c, make_number (040))) | |
1351 | { | |
1352 | cancel_echoing (); | |
1353 | c = read_char (0); | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | return c; | |
1358 | } | |
1359 | ||
1360 | Lisp_Object | |
1361 | print_help (object) | |
1362 | Lisp_Object object; | |
1363 | { | |
1364 | Fprinc (object, Qnil); | |
1365 | return Qnil; | |
1366 | } | |
1367 | ||
1368 | /* Copy out or in the info on where C-g should throw to. | |
1369 | This is used when running Lisp code from within get_char, | |
1370 | in case get_char is called recursively. | |
1371 | See read_process_output. */ | |
1372 | ||
1373 | save_getcjmp (temp) | |
1374 | jmp_buf temp; | |
1375 | { | |
1376 | bcopy (getcjmp, temp, sizeof getcjmp); | |
1377 | } | |
1378 | ||
1379 | restore_getcjmp (temp) | |
1380 | jmp_buf temp; | |
1381 | { | |
1382 | bcopy (temp, getcjmp, sizeof getcjmp); | |
1383 | } | |
1384 | ||
1385 | \f | |
1386 | /* Low level keyboard/mouse input. | |
1387 | kbd_buffer_store_event places events in kbd_buffer, and | |
1388 | kbd_buffer_get_event retrieves them. | |
1389 | mouse_moved indicates when the mouse has moved again, and | |
1390 | *mouse_position_hook provides the mouse position. */ | |
1391 | ||
1392 | /* Set this for debugging, to have a way to get out */ | |
1393 | int stop_character; | |
1394 | ||
1395 | extern int screen_garbaged; | |
1396 | ||
1397 | /* Return true iff there are any events in the queue that read-char | |
1398 | would return. If this returns false, a read-char would block. */ | |
1399 | static int | |
1400 | readable_events () | |
1401 | { | |
1402 | struct input_event *ep; | |
1403 | ||
1404 | if (EVENT_QUEUES_EMPTY) | |
1405 | return 0; | |
1406 | ||
1407 | if (do_mouse_tracking) | |
1408 | return 1; | |
1409 | ||
1410 | /* Mouse tracking is disabled, so we need to actually scan the | |
1411 | input queue to see if any events are currently readable. */ | |
1412 | for (ep = kbd_fetch_ptr; ep != kbd_store_ptr; ep++) | |
1413 | { | |
1414 | if (ep == kbd_buffer + KBD_BUFFER_SIZE) | |
1415 | ep = kbd_buffer; | |
1416 | ||
1417 | /* Skip button-up events. */ | |
1418 | if ((ep->kind == mouse_click || ep->kind == scrollbar_click) | |
1419 | && (ep->modifiers & up_modifier)) | |
1420 | continue; | |
1421 | ||
1422 | return 1; | |
1423 | } | |
1424 | ||
1425 | return 0; | |
1426 | } | |
1427 | ||
1428 | ||
1429 | /* Restore mouse tracking enablement. See Ftrack_mouse for the only use | |
1430 | of this function. */ | |
1431 | static Lisp_Object | |
1432 | tracking_off (old_value) | |
1433 | Lisp_Object old_value; | |
1434 | { | |
1435 | if (! XFASTINT (old_value)) | |
1436 | { | |
1437 | do_mouse_tracking = 0; | |
1438 | ||
1439 | /* Redisplay may have been preempted because there was input | |
1440 | available, and it assumes it will be called again after the | |
1441 | input has been processed. If the only input available was | |
1442 | the sort that we have just disabled, then we need to call | |
1443 | redisplay. */ | |
1444 | if (!readable_events ()) | |
1445 | { | |
1446 | redisplay_preserve_echo_area (); | |
1447 | get_input_pending (&input_pending); | |
1448 | } | |
1449 | } | |
1450 | } | |
1451 | ||
1452 | DEFUN ("track-mouse", Ftrack_mouse, Strack_mouse, 0, UNEVALLED, 0, | |
1453 | "Evaluate BODY with mouse movement and button release events enabled.\n\ | |
3371bdfc RS |
1454 | Within a `track-mouse', mouse motion and button releases generate input\n\ |
1455 | events that you can read with `read-event'.\n\ | |
1456 | Normally, these occurrences don't generate events.") | |
284f4730 JB |
1457 | (args) |
1458 | Lisp_Object args; | |
1459 | { | |
1460 | int count = specpdl_ptr - specpdl; | |
1461 | Lisp_Object val; | |
1462 | ||
1463 | XSET (val, Lisp_Int, do_mouse_tracking); | |
1464 | record_unwind_protect (tracking_off, val); | |
1465 | ||
1466 | do_mouse_tracking = 1; | |
1467 | ||
1468 | val = Fprogn (args); | |
1469 | return unbind_to (count, val); | |
1470 | } | |
1471 | ||
1472 | /* Store an event obtained at interrupt level into kbd_buffer, fifo */ | |
1473 | ||
1474 | void | |
1475 | kbd_buffer_store_event (event) | |
1476 | register struct input_event *event; | |
1477 | { | |
1478 | if (event->kind == no_event) | |
1479 | abort (); | |
1480 | ||
1481 | if (event->kind == ascii_keystroke) | |
1482 | { | |
1483 | register int c = XFASTINT (event->code) & 0377; | |
1484 | ||
1485 | if (c == quit_char | |
1486 | || ((c == (0200 | quit_char)) && !meta_key)) | |
1487 | { | |
1488 | /* If this results in a quit_char being returned to Emacs as | |
1489 | input, set last-event-screen properly. If this doesn't | |
1490 | get returned to Emacs as an event, the next event read | |
1491 | will set Vlast_event_screen again, so this is safe to do. */ | |
1492 | extern SIGTYPE interrupt_signal (); | |
1493 | XSET (Vlast_event_screen, Lisp_Screen, event->screen); | |
ffd56f97 | 1494 | last_event_timestamp = event->timestamp; |
284f4730 JB |
1495 | interrupt_signal (); |
1496 | return; | |
1497 | } | |
1498 | ||
1499 | if (c && c == stop_character) | |
1500 | { | |
1501 | sys_suspend (); | |
1502 | return; | |
1503 | } | |
1504 | ||
1505 | XSET (event->code, Lisp_Int, c); | |
1506 | } | |
1507 | ||
1508 | if (kbd_store_ptr - kbd_buffer == KBD_BUFFER_SIZE) | |
1509 | kbd_store_ptr = kbd_buffer; | |
1510 | ||
1511 | /* Don't let the very last slot in the buffer become full, | |
1512 | since that would make the two pointers equal, | |
1513 | and that is indistinguishable from an empty buffer. | |
1514 | Discard the event if it would fill the last slot. */ | |
1515 | if (kbd_fetch_ptr - 1 != kbd_store_ptr) | |
1516 | { | |
1517 | kbd_store_ptr->kind = event->kind; | |
1518 | kbd_store_ptr->code = event->code; | |
1519 | kbd_store_ptr->part = event->part; | |
1520 | kbd_store_ptr->screen = event->screen; | |
1521 | kbd_store_ptr->modifiers = event->modifiers; | |
1522 | kbd_store_ptr->x = event->x; | |
1523 | kbd_store_ptr->y = event->y; | |
1524 | kbd_store_ptr->timestamp = event->timestamp; | |
1525 | ||
1526 | kbd_store_ptr++; | |
1527 | } | |
1528 | } | |
1529 | ||
1530 | static Lisp_Object make_lispy_event (); | |
1531 | static Lisp_Object make_lispy_movement (); | |
1532 | static Lisp_Object modify_event_symbol (); | |
1533 | ||
1534 | static Lisp_Object | |
1535 | kbd_buffer_get_event () | |
1536 | { | |
1537 | register int c; | |
1538 | Lisp_Object obj; | |
1539 | ||
1540 | if (noninteractive) | |
1541 | { | |
1542 | c = getchar (); | |
1543 | XSET (obj, Lisp_Int, c); | |
1544 | return obj; | |
1545 | } | |
1546 | ||
1547 | /* Wait until there is input available. */ | |
1548 | for (;;) | |
1549 | { | |
1550 | ||
1551 | /* Process or toss any events that we don't want to return as | |
1552 | input. The fact that we remove undesirable events here | |
1553 | allows us to use EVENT_QUEUES_EMPTY in the rest of this loop. */ | |
1554 | if (! do_mouse_tracking) | |
1555 | while (kbd_fetch_ptr != kbd_store_ptr) | |
1556 | { | |
1557 | if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE) | |
1558 | kbd_fetch_ptr = kbd_buffer; | |
1559 | ||
1560 | if (kbd_fetch_ptr->kind == mouse_click | |
1561 | || kbd_fetch_ptr->kind == scrollbar_click) | |
1562 | { | |
1563 | if ((kbd_fetch_ptr->modifiers & up_modifier) == 0) | |
1564 | break; | |
1565 | } | |
1566 | else | |
1567 | break; | |
1568 | ||
1569 | kbd_fetch_ptr++; | |
1570 | } | |
1571 | ||
1572 | if (!EVENT_QUEUES_EMPTY) | |
1573 | break; | |
1574 | ||
1575 | /* If the quit flag is set, then read_char will return | |
1576 | quit_char, so that counts as "available input." */ | |
1577 | if (!NILP (Vquit_flag)) | |
1578 | quit_throw_to_read_char (); | |
1579 | ||
1580 | /* One way or another, wait until input is available; then, if | |
1581 | interrupt handlers have not read it, read it now. */ | |
1582 | ||
1583 | #ifdef OLDVMS | |
1584 | wait_for_kbd_input (); | |
1585 | #else | |
1586 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
1587 | #ifdef SIGIO | |
1588 | gobble_input (0); | |
1589 | #endif /* SIGIO */ | |
1590 | if (EVENT_QUEUES_EMPTY) | |
1591 | { | |
f76475ad JB |
1592 | Lisp_Object minus_one; |
1593 | ||
1594 | XSET (minus_one, Lisp_Int, -1); | |
1595 | wait_reading_process_input (0, 0, minus_one, 1); | |
284f4730 JB |
1596 | |
1597 | if (!interrupt_input && EVENT_QUEUES_EMPTY) | |
1598 | { | |
1599 | read_avail_input (0); | |
1600 | } | |
1601 | } | |
1602 | #endif /* not VMS */ | |
1603 | } | |
1604 | ||
1605 | /* At this point, we know that there is a readable event available | |
1606 | somewhere. If the event queue is empty, then there must be a | |
1607 | mouse movement enabled and available. */ | |
1608 | if (kbd_fetch_ptr != kbd_store_ptr) | |
1609 | { | |
1610 | if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE) | |
1611 | kbd_fetch_ptr = kbd_buffer; | |
1612 | XSET (Vlast_event_screen, Lisp_Screen, kbd_fetch_ptr->screen); | |
1613 | last_event_timestamp = XINT (kbd_fetch_ptr->timestamp); | |
1614 | obj = make_lispy_event (kbd_fetch_ptr); | |
1615 | kbd_fetch_ptr->kind = no_event; | |
1616 | kbd_fetch_ptr++; | |
1617 | if (XTYPE (obj) == Lisp_Int) | |
1618 | XSET (obj, Lisp_Int, XINT (obj) & (meta_key ? 0377 : 0177)); | |
1619 | } | |
1620 | else if (do_mouse_tracking && mouse_moved) | |
1621 | { | |
1622 | SCREEN_PTR screen; | |
1623 | Lisp_Object x, y, time; | |
1624 | ||
1625 | (*mouse_position_hook) (&screen, &x, &y, &time); | |
1626 | XSET (Vlast_event_screen, Lisp_Screen, screen); | |
1627 | ||
1628 | obj = make_lispy_movement (screen, x, y, time); | |
1629 | } | |
1630 | else | |
1631 | /* We were promised by the above while loop that there was | |
1632 | something for us to read! */ | |
1633 | abort (); | |
1634 | ||
1635 | input_pending = readable_events (); | |
1636 | ||
1637 | return (obj); | |
1638 | } | |
1639 | ||
1640 | /* Caches for modify_event_symbol. */ | |
1641 | static Lisp_Object func_key_syms; | |
1642 | static Lisp_Object mouse_syms; | |
1643 | ||
1644 | /* You'll notice that this table is arranged to be conveniently | |
1645 | indexed by X Windows keysym values. */ | |
1646 | static char *lispy_function_keys[] = | |
1647 | { | |
1648 | /* X Keysym value */ | |
1649 | ||
1650 | "home", /* 0xff50 */ /* IsCursorKey */ | |
1651 | "left", | |
1652 | "up", | |
1653 | "right", | |
1654 | "down", | |
1655 | "prior", | |
1656 | "next", | |
1657 | "end", | |
1658 | "begin", | |
1659 | 0, /* 0xff59 */ | |
1660 | 0, 0, 0, 0, 0, 0, | |
1661 | "select", /* 0xff60 */ /* IsMiscFunctionKey */ | |
1662 | "print", | |
1663 | "execute", | |
1664 | "insert", | |
1665 | 0, /* 0xff64 */ | |
1666 | "undo", | |
1667 | "redo", | |
1668 | "menu", | |
1669 | "find", | |
1670 | "cancel", | |
1671 | "help", | |
1672 | "break", /* 0xff6b */ | |
1673 | ||
1674 | /* Here are some keys found mostly on HP keyboards. The X event | |
1675 | handling code will strip bit 29, which flags vendor-specific | |
1676 | keysyms. */ | |
1677 | "reset", /* 0x1000ff6c */ | |
1678 | "system", | |
1679 | "user", | |
1680 | "clearline", | |
1681 | "insertline", | |
1682 | "deleteline", | |
1683 | "insertchar", | |
1684 | "deletechar", | |
1685 | "backtab", | |
1686 | "kp_backtab", /* 0x1000ff75 */ | |
1687 | 0, /* 0xff76 */ | |
1688 | 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff7f */ | |
1689 | "kp-space", /* 0xff80 */ /* IsKeypadKey */ | |
1690 | 0, 0, 0, 0, 0, 0, 0, 0, | |
1691 | "kp-tab", /* 0xff89 */ | |
1692 | 0, 0, 0, | |
1693 | "kp-enter", /* 0xff8d */ | |
1694 | 0, 0, 0, | |
1695 | "kp-f1", /* 0xff91 */ | |
1696 | "kp-f2", | |
1697 | "kp-f3", | |
1698 | "kp-f4", | |
1699 | 0, /* 0xff95 */ | |
1700 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
1701 | "kp-multiply", /* 0xffaa */ | |
1702 | "kp-add", | |
1703 | "kp-separator", | |
1704 | "kp-subtract", | |
1705 | "kp-decimal", | |
1706 | "kp-divide", /* 0xffaf */ | |
1707 | "kp-0", /* 0xffb0 */ | |
1708 | "kp-1", "kp-2", "kp-3", "kp-4", "kp-5", "kp-6", "kp-7", "kp-8", "kp-9", | |
1709 | 0, /* 0xffba */ | |
1710 | 0, 0, | |
1711 | "kp-equal", /* 0xffbd */ | |
1712 | "f1", /* 0xffbe */ /* IsFunctionKey */ | |
1713 | "f2", "f3", "f4", | |
1714 | "f5", "f6", "f7", "f8", "f9", "f10", "f11", "f12", | |
1715 | "f13", "f14", "f15", "f16", "f17", "f18", "f19", "f20", | |
1716 | "f21", "f22", "f23", "f24", "f25", "f26", "f27", "f28", | |
1717 | "f29", "f30", "f31", "f32", "f33", "f34", "f35" /* 0xffe0 */ | |
1718 | }; | |
1719 | ||
1720 | static char *lispy_mouse_names[] = | |
1721 | { | |
1722 | "mouse-1", "mouse-2", "mouse-3", "mouse-4", "mouse-5" | |
1723 | }; | |
1724 | ||
1725 | /* Given a struct input_event, build the lisp event which represents | |
1726 | it. If EVENT is 0, build a mouse movement event from the mouse | |
1727 | movement buffer, which should have a movement event in it. */ | |
1728 | ||
1729 | static Lisp_Object | |
1730 | make_lispy_event (event) | |
1731 | struct input_event *event; | |
1732 | { | |
1733 | #ifdef SWITCH_ENUM_BUG | |
1734 | switch ((int) event->kind) | |
1735 | #else | |
1736 | switch (event->kind) | |
1737 | #endif | |
1738 | { | |
1739 | ||
1740 | /* A simple keystroke. */ | |
1741 | case ascii_keystroke: | |
1742 | return event->code; | |
1743 | break; | |
1744 | ||
1745 | /* A function key. The symbol may need to have modifier prefixes | |
1746 | tacked onto it. */ | |
1747 | case non_ascii_keystroke: | |
1748 | return modify_event_symbol (XFASTINT (event->code), event->modifiers, | |
1749 | Qfunction_key, | |
1750 | lispy_function_keys, &func_key_syms, | |
1751 | (sizeof (lispy_function_keys) | |
1752 | / sizeof (lispy_function_keys[0]))); | |
1753 | break; | |
1754 | ||
1755 | /* A mouse click - build a list of the relevant information. */ | |
1756 | case mouse_click: | |
1757 | { | |
1758 | int part; | |
1759 | Lisp_Object window = | |
1760 | window_from_coordinates (event->screen, | |
1761 | XINT (event->x), XINT (event->y), | |
1762 | &part); | |
1763 | Lisp_Object posn; | |
1764 | ||
1765 | if (XTYPE (window) != Lisp_Window) | |
1766 | posn = Qnil; | |
1767 | else | |
1768 | { | |
1769 | XSETINT (event->x, (XINT (event->x) | |
1770 | - XINT (XWINDOW (window)->left))); | |
1771 | XSETINT (event->y, (XINT (event->y) | |
1772 | - XINT (XWINDOW (window)->top))); | |
1773 | ||
1774 | if (part == 1) | |
1775 | posn = Qmode_line; | |
1776 | else if (part == 2) | |
1777 | posn = Qvertical_split; | |
1778 | else | |
1779 | XSET (posn, Lisp_Int, | |
1780 | buffer_posn_from_coords (XWINDOW (window), | |
1781 | XINT (event->x), | |
1782 | XINT (event->y))); | |
1783 | } | |
1784 | ||
1785 | return Fcons (modify_event_symbol (XFASTINT (event->code) - 1, | |
1786 | event->modifiers, | |
1787 | Qmouse_click, | |
1788 | lispy_mouse_names, &mouse_syms, | |
1789 | (sizeof (lispy_mouse_names) | |
1790 | / sizeof (lispy_mouse_names[0]))), | |
1791 | Fcons (window, | |
1792 | Fcons (posn, | |
1793 | Fcons (Fcons (event->x, event->y), | |
1794 | Fcons (event->timestamp, | |
1795 | Qnil))))); | |
1796 | } | |
1797 | ||
1798 | /* A scrollbar click. Build a list containing the relevant | |
1799 | information. */ | |
1800 | case scrollbar_click: | |
1801 | { | |
1802 | Lisp_Object button | |
1803 | = modify_event_symbol (XFASTINT (event->code) - 1, | |
1804 | event->modifiers, | |
1805 | Qmouse_click, | |
1806 | lispy_mouse_names, &mouse_syms, | |
1807 | (sizeof (lispy_mouse_names) | |
1808 | / sizeof (lispy_mouse_names[0]))); | |
1809 | return Fcons (event->part, | |
1810 | Fcons (SCREEN_SELECTED_WINDOW (event->screen), | |
1811 | Fcons (button, | |
1812 | Fcons (Fcons (event->x, event->y), | |
1813 | Fcons (event->timestamp, | |
1814 | Qnil))))); | |
1815 | } | |
1816 | ||
1817 | /* The 'kind' field of the event is something we don't recognize. */ | |
1818 | default: | |
1819 | abort(); | |
1820 | } | |
1821 | } | |
1822 | ||
1823 | static Lisp_Object | |
1824 | make_lispy_movement (screen, x, y, time) | |
1825 | SCREEN_PTR screen; | |
1826 | Lisp_Object x, y; | |
1827 | Lisp_Object time; | |
1828 | { | |
1829 | Lisp_Object window; | |
1830 | int ix, iy; | |
1831 | Lisp_Object posn; | |
1832 | int part; | |
1833 | ||
1834 | ix = XINT (x); | |
1835 | iy = XINT (y); | |
1836 | window = (screen | |
1837 | ? window_from_coordinates (screen, ix, iy, &part) | |
1838 | : Qnil); | |
1839 | if (XTYPE (window) != Lisp_Window) | |
1840 | posn = Qnil; | |
1841 | else | |
1842 | { | |
1843 | ix -= XINT (XWINDOW (window)->left); | |
1844 | iy -= XINT (XWINDOW (window)->top); | |
1845 | if (part == 1) | |
1846 | posn = Qmode_line; | |
1847 | else if (part == 2) | |
1848 | posn = Qvertical_split; | |
1849 | else | |
1850 | XSET (posn, Lisp_Int, buffer_posn_from_coords (XWINDOW (window), | |
1851 | ix, iy)); | |
1852 | } | |
1853 | ||
1854 | XSETINT (x, ix); | |
1855 | XSETINT (y, iy); | |
1856 | return Fcons (Qmouse_movement, | |
1857 | Fcons (window, | |
1858 | Fcons (posn, | |
1859 | Fcons (Fcons (x, y), | |
1860 | Fcons (time, Qnil))))); | |
1861 | } | |
1862 | ||
1863 | ||
1864 | ||
1865 | /* Place the written representation of MODIFIERS in BUF, '\0'-terminated, | |
1866 | and return its length. */ | |
1867 | ||
1868 | static int | |
1869 | format_modifiers (modifiers, buf) | |
1870 | int modifiers; | |
1871 | char *buf; | |
1872 | { | |
1873 | char *p = buf; | |
1874 | ||
1875 | if (modifiers & meta_modifier) { *p++ = 'M'; *p++ = '-'; } | |
1876 | if (modifiers & ctrl_modifier) { *p++ = 'C'; *p++ = '-'; } | |
1877 | if (modifiers & shift_modifier) { *p++ = 'S'; *p++ = '-'; } | |
1878 | if (modifiers & up_modifier) { *p++ = 'U'; *p++ = '-'; } | |
1879 | *p = '\0'; | |
1880 | ||
1881 | return p - buf; | |
1882 | } | |
1883 | ||
1884 | ||
1885 | /* Given a symbol whose name begins with modifiers ("C-", "M-", etc), | |
1886 | return a symbol with the modifiers placed in the canonical order. | |
1887 | ||
1888 | Fdefine_key calls this to make sure that (for example) C-M-foo | |
1889 | and M-C-foo end up being equivalent in the keymap. */ | |
1890 | ||
1891 | Lisp_Object | |
1892 | reorder_modifiers (symbol) | |
1893 | Lisp_Object symbol; | |
1894 | { | |
1895 | struct Lisp_String *name; | |
1896 | int i; | |
1897 | int modifiers; | |
1898 | int not_canonical; | |
1899 | ||
1900 | CHECK_SYMBOL (symbol, 1); | |
1901 | ||
1902 | modifiers = 0; | |
1903 | name = XSYMBOL (symbol)->name; | |
1904 | ||
1905 | /* Special case for things with only one modifier, which is | |
1906 | (hopefully) the vast majority of cases. */ | |
1907 | if (! (name->size >= 4 && name->data[1] == '-' && name->data[3] == '-')) | |
1908 | return symbol; | |
1909 | ||
1910 | for (i = 0; i + 1 < name->size && name->data[i + 1] == '-'; i += 2) | |
1911 | switch (name->data[i]) | |
1912 | { | |
1913 | case 'M': | |
1914 | not_canonical |= (modifiers & (meta_modifier|ctrl_modifier | |
1915 | |shift_modifier|up_modifier)); | |
1916 | modifiers |= meta_modifier; | |
1917 | break; | |
1918 | ||
1919 | case 'C': | |
1920 | not_canonical |= (modifiers & | |
1921 | (ctrl_modifier|shift_modifier|up_modifier)); | |
1922 | modifiers |= ctrl_modifier; | |
1923 | break; | |
1924 | ||
1925 | case 'S': | |
1926 | not_canonical |= (modifiers & (shift_modifier|up_modifier)); | |
1927 | modifiers |= shift_modifier; | |
1928 | break; | |
1929 | ||
1930 | case 'U': | |
1931 | not_canonical |= (modifiers & (up_modifier)); | |
1932 | modifiers |= up_modifier; | |
1933 | break; | |
1934 | ||
1935 | default: | |
1936 | goto no_more_modifiers; | |
1937 | } | |
1938 | no_more_modifiers: | |
1939 | ||
1940 | if (!not_canonical) | |
1941 | return symbol; | |
1942 | ||
1943 | /* The modifiers were out of order, so find a new symbol with the | |
1944 | mods in order. Since the symbol name could contain nulls, we can't | |
1945 | use intern here; we have to use Fintern, which expects a genuine | |
1946 | Lisp_String, and keeps a reference to it. */ | |
1947 | { | |
1948 | char *new_mods = (char *) alloca (sizeof ("C-M-S-U-")); | |
1949 | int len = format_modifiers (modifiers, new_mods); | |
1950 | Lisp_Object new_name = make_uninit_string (len + name->size - i); | |
1951 | ||
1952 | bcopy (new_mods, XSTRING (new_name)->data, len); | |
1953 | bcopy (name->data + i, XSTRING (new_name)->data + len, name->size - i); | |
1954 | ||
1955 | return Fintern (new_name, Qnil); | |
1956 | } | |
1957 | } | |
1958 | ||
1959 | ||
1960 | /* For handling events, we often want to produce a symbol whose name | |
1961 | is a series of modifier key prefixes ("M-", "C-", etcetera) attached | |
1962 | to some base, like the name of a function key or mouse button. | |
1963 | modify_event_symbol produces symbols of this sort. | |
1964 | ||
1965 | NAME_TABLE should point to an array of strings, such that NAME_TABLE[i] | |
1966 | is the name of the i'th symbol. TABLE_SIZE is the number of elements | |
1967 | in the table. | |
1968 | ||
1969 | SYMBOL_TABLE should be a pointer to a Lisp_Object whose value will | |
1970 | persist between calls to modify_event_symbol that it can use to | |
1971 | store a cache of the symbols it's generated for this NAME_TABLE | |
1972 | before. | |
1973 | ||
1974 | SYMBOL_NUM is the number of the base name we want from NAME_TABLE. | |
1975 | ||
1976 | MODIFIERS is a set of modifier bits (as given in struct input_events) | |
1977 | whose prefixes should be applied to the symbol name. | |
1978 | ||
1979 | SYMBOL_KIND is the value to be placed in the event_kind property of | |
1980 | the returned symbol. */ | |
1981 | ||
1982 | static Lisp_Object | |
1983 | modify_event_symbol (symbol_num, modifiers, symbol_kind, name_table, | |
1984 | symbol_table, table_size) | |
1985 | int symbol_num; | |
1986 | unsigned modifiers; | |
1987 | Lisp_Object symbol_kind; | |
1988 | char **name_table; | |
1989 | Lisp_Object *symbol_table; | |
1990 | int table_size; | |
1991 | { | |
1992 | Lisp_Object *slot, *unmodified_slot; | |
1993 | ||
1994 | /* Is this a request for a valid symbol? */ | |
1995 | if (symbol_num < 0 || symbol_num >= table_size | |
1996 | || modifiers >= NUM_MODIFIER_COMBOS) | |
1997 | abort (); | |
1998 | ||
1999 | /* If *symbol_table is not a vector of the appropriate size, | |
2000 | set it to one. */ | |
2001 | if (XTYPE (*symbol_table) != Lisp_Vector | |
2002 | || XVECTOR (*symbol_table)->size != table_size) | |
2003 | *symbol_table = Fmake_vector (make_number (table_size), Qnil); | |
2004 | ||
2005 | unmodified_slot = slot = & XVECTOR (*symbol_table)->contents[symbol_num]; | |
2006 | ||
2007 | /* If there are modifier keys, there had better be a vector in | |
2008 | this symbol's position of the symbol_table. */ | |
2009 | if (modifiers != 0) | |
2010 | { | |
2011 | Lisp_Object slot_contents = *slot; | |
2012 | ||
2013 | /* If there isn't the right sort of vector there, put one in. */ | |
2014 | if (XTYPE (slot_contents) != Lisp_Vector | |
2015 | || XVECTOR (slot_contents)->size != NUM_MODIFIER_COMBOS) | |
2016 | { | |
2017 | *slot = Fmake_vector (make_number (NUM_MODIFIER_COMBOS), Qnil); | |
2018 | ||
2019 | /* Make sure that the vector has an entry for the unmodified | |
2020 | symbol, so we can put it on the event_unmodified property. */ | |
2021 | if (! NILP (slot_contents)) | |
2022 | XVECTOR (*slot)->contents[0] = slot_contents; | |
2023 | else | |
2024 | XVECTOR (*slot)->contents[0] = intern (name_table [symbol_num]); | |
2025 | } | |
2026 | } | |
2027 | ||
2028 | /* If this entry has been filled in with a modified symbol vector, | |
2029 | point to the appropriate slot within that. */ | |
2030 | if (XTYPE (*slot) == Lisp_Vector) | |
2031 | { | |
2032 | unmodified_slot = & XVECTOR (*slot)->contents[0]; | |
2033 | slot = & XVECTOR (*slot)->contents[modifiers]; | |
2034 | } | |
2035 | ||
2036 | /* Make sure we have an unmodified version of the symbol in its | |
2037 | proper place? */ | |
2038 | if (NILP (*unmodified_slot)) | |
2039 | { | |
2040 | *unmodified_slot = intern (name_table [symbol_num]); | |
2041 | Fput (*unmodified_slot, Qevent_kind, symbol_kind); | |
2042 | Fput (*unmodified_slot, Qevent_unmodified, *unmodified_slot); | |
2043 | } | |
2044 | ||
2045 | /* Have we already created a symbol for this combination of modifiers? */ | |
2046 | if (NILP (*slot)) | |
2047 | { | |
2048 | /* No, let's create one. */ | |
2049 | char *modified_name | |
2050 | = (char *) alloca (sizeof ("C-M-S-U-") | |
2051 | + strlen (name_table [symbol_num])); | |
2052 | ||
2053 | strcpy (modified_name + format_modifiers (modifiers, modified_name), | |
2054 | name_table [symbol_num]); | |
2055 | ||
2056 | *slot = intern (modified_name); | |
2057 | Fput (*slot, Qevent_kind, symbol_kind); | |
2058 | Fput (*slot, Qevent_unmodified, *unmodified_slot); | |
2059 | } | |
2060 | ||
2061 | return *slot; | |
2062 | } | |
2063 | \f | |
2064 | DEFUN ("mouse-click-p", Fmouse_click_p, Smouse_click_p, 1, 1, 0, | |
2065 | "Return non-nil iff OBJECT is a representation of a mouse event.\n\ | |
2066 | A mouse event is a list of five elements whose car is a symbol of the\n\ | |
2067 | form <MODIFIERS>mouse-<DIGIT>. I hope this is a temporary hack.") | |
2068 | (object) | |
2069 | Lisp_Object object; | |
2070 | { | |
2071 | if (EVENT_HAS_PARAMETERS (object) | |
2072 | && EQ (EVENT_HEAD_KIND (EVENT_HEAD (object)), | |
2073 | Qmouse_click)) | |
2074 | return Qt; | |
2075 | else | |
2076 | return Qnil; | |
2077 | } | |
2078 | \f | |
2079 | /* Store into *addr a value nonzero if terminal input chars are available. | |
2080 | Serves the purpose of ioctl (0, FIONREAD, addr) | |
2081 | but works even if FIONREAD does not exist. | |
2082 | (In fact, this may actually read some input.) */ | |
2083 | ||
2084 | static void | |
2085 | get_input_pending (addr) | |
2086 | int *addr; | |
2087 | { | |
2088 | /* First of all, have we already counted some input? */ | |
2089 | *addr = !NILP (Vquit_flag) || readable_events (); | |
2090 | ||
2091 | /* If input is being read as it arrives, and we have none, there is none. */ | |
2092 | if (*addr > 0 || (interrupt_input && ! interrupts_deferred)) | |
2093 | return; | |
2094 | ||
2095 | /* Try to read some input and see how much we get. */ | |
2096 | gobble_input (0); | |
2097 | *addr = !NILP (Vquit_flag) || readable_events (); | |
2098 | } | |
2099 | ||
2100 | /* Interface to read_avail_input, blocking SIGIO if necessary. */ | |
2101 | ||
2102 | int | |
2103 | gobble_input (expected) | |
2104 | int expected; | |
2105 | { | |
2106 | #ifndef VMS | |
2107 | #ifdef SIGIO | |
2108 | if (interrupt_input) | |
2109 | { | |
32676c08 | 2110 | SIGMASKTYPE mask; |
e065a56e | 2111 | mask = sigblockx (SIGIO); |
284f4730 | 2112 | read_avail_input (expected); |
e065a56e | 2113 | sigsetmask (mask); |
284f4730 JB |
2114 | } |
2115 | else | |
2116 | #endif | |
2117 | read_avail_input (expected); | |
2118 | #endif | |
2119 | } | |
2120 | \f | |
2121 | #ifndef VMS | |
2122 | ||
2123 | /* Read any terminal input already buffered up by the system | |
2124 | into the kbd_buffer, but do not wait. | |
2125 | ||
2126 | EXPECTED should be nonzero if the caller knows there is some input. | |
2127 | ||
2128 | Except on VMS, all input is read by this function. | |
2129 | If interrupt_input is nonzero, this function MUST be called | |
2130 | only when SIGIO is blocked. | |
2131 | ||
2132 | Returns the number of keyboard chars read, or -1 meaning | |
2133 | this is a bad time to try to read input. */ | |
2134 | ||
2135 | static int | |
2136 | read_avail_input (expected) | |
2137 | int expected; | |
2138 | { | |
2139 | struct input_event buf[KBD_BUFFER_SIZE]; | |
2140 | register int i; | |
2141 | int nread; | |
2142 | ||
2143 | if (read_socket_hook) | |
2144 | /* No need for FIONREAD or fcntl; just say don't wait. */ | |
2145 | nread = (*read_socket_hook) (0, buf, KBD_BUFFER_SIZE, expected, expected); | |
2146 | else | |
2147 | { | |
2148 | unsigned char cbuf[KBD_BUFFER_SIZE]; | |
2149 | ||
2150 | #ifdef FIONREAD | |
2151 | /* Find out how much input is available. */ | |
2152 | if (ioctl (0, FIONREAD, &nread) < 0) | |
2153 | /* Formerly simply reported no input, but that sometimes led to | |
2154 | a failure of Emacs to terminate. | |
2155 | SIGHUP seems appropriate if we can't reach the terminal. */ | |
2156 | kill (getpid (), SIGHUP); | |
2157 | if (nread == 0) | |
2158 | return 0; | |
2159 | if (nread > sizeof cbuf) | |
2160 | nread = sizeof cbuf; | |
2161 | #else /* no FIONREAD */ | |
2162 | #ifdef USG | |
2163 | /* Read some input if available, but don't wait. */ | |
2164 | nread = sizeof cbuf; | |
2165 | fcntl (fileno (stdin), F_SETFL, O_NDELAY); | |
2166 | #else | |
2167 | you lose; | |
2168 | #endif | |
2169 | #endif | |
2170 | ||
2171 | /* Now read; for one reason or another, this will not block. */ | |
2172 | while (1) | |
2173 | { | |
2174 | nread = read (fileno (stdin), cbuf, nread); | |
2175 | #ifdef AIX | |
2176 | /* The kernel sometimes fails to deliver SIGHUP for ptys. | |
2177 | This looks incorrect, but it isn't, because _BSD causes | |
2178 | O_NDELAY to be defined in fcntl.h as O_NONBLOCK, | |
2179 | and that causes a value other than 0 when there is no input. */ | |
2180 | if (nread == 0) | |
2181 | kill (SIGHUP, 0); | |
2182 | #endif | |
2183 | /* Retry the read if it is interrupted. */ | |
2184 | if (nread >= 0 | |
2185 | || ! (errno == EAGAIN || errno == EFAULT | |
2186 | #ifdef EBADSLT | |
2187 | || errno == EBADSLT | |
2188 | #endif | |
2189 | )) | |
2190 | break; | |
2191 | } | |
2192 | ||
2193 | #ifndef FIONREAD | |
2194 | #ifdef USG | |
2195 | fcntl (fileno (stdin), F_SETFL, 0); | |
2196 | #endif /* USG */ | |
2197 | #endif /* no FIONREAD */ | |
2198 | for (i = 0; i < nread; i++) | |
2199 | { | |
2200 | buf[i].kind = ascii_keystroke; | |
2201 | XSET (buf[i].code, Lisp_Int, cbuf[i]); | |
2202 | buf[i].screen = selected_screen; | |
2203 | } | |
2204 | } | |
2205 | ||
2206 | /* Scan the chars for C-g and store them in kbd_buffer. */ | |
2207 | for (i = 0; i < nread; i++) | |
2208 | { | |
2209 | kbd_buffer_store_event (&buf[i]); | |
2210 | /* Don't look at input that follows a C-g too closely. | |
2211 | This reduces lossage due to autorepeat on C-g. */ | |
2212 | if (buf[i].kind == ascii_keystroke | |
2213 | && XINT(buf[i].code) == quit_char) | |
2214 | break; | |
2215 | } | |
2216 | ||
2217 | return nread; | |
2218 | } | |
2219 | #endif /* not VMS */ | |
2220 | \f | |
2221 | #ifdef SIGIO /* for entire page */ | |
2222 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
2223 | ||
2224 | input_available_signal (signo) | |
2225 | int signo; | |
2226 | { | |
2227 | /* Must preserve main program's value of errno. */ | |
2228 | int old_errno = errno; | |
2229 | #ifdef BSD4_1 | |
2230 | extern int select_alarmed; | |
2231 | #endif | |
2232 | ||
2233 | #ifdef USG | |
2234 | /* USG systems forget handlers when they are used; | |
2235 | must reestablish each time */ | |
2236 | signal (signo, input_available_signal); | |
2237 | #endif /* USG */ | |
2238 | ||
2239 | #ifdef BSD4_1 | |
2240 | sigisheld (SIGIO); | |
2241 | #endif | |
2242 | ||
ffd56f97 JB |
2243 | if (input_available_clear_time) |
2244 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
284f4730 JB |
2245 | |
2246 | while (1) | |
2247 | { | |
2248 | int nread; | |
2249 | nread = read_avail_input (1); | |
2250 | /* -1 means it's not ok to read the input now. | |
2251 | UNBLOCK_INPUT will read it later; now, avoid infinite loop. | |
2252 | 0 means there was no keyboard input available. */ | |
2253 | if (nread <= 0) | |
2254 | break; | |
2255 | ||
2256 | #ifdef BSD4_1 | |
2257 | select_alarmed = 1; /* Force the select emulator back to life */ | |
2258 | #endif | |
2259 | } | |
2260 | ||
2261 | #ifdef BSD4_1 | |
2262 | sigfree (); | |
2263 | #endif | |
2264 | errno = old_errno; | |
2265 | } | |
2266 | #endif /* SIGIO */ | |
2267 | \f | |
2268 | /* Return the prompt-string of a sparse keymap. | |
2269 | This is the first element which is a string. | |
2270 | Return nil if there is none. */ | |
2271 | ||
2272 | Lisp_Object | |
2273 | map_prompt (map) | |
2274 | Lisp_Object map; | |
2275 | { | |
2276 | while (CONSP (map)) | |
2277 | { | |
2278 | register Lisp_Object tem; | |
2279 | tem = Fcar (map); | |
2280 | if (XTYPE (tem) == Lisp_String) | |
2281 | return tem; | |
2282 | map = Fcdr (map); | |
2283 | } | |
2284 | return Qnil; | |
2285 | } | |
2286 | ||
2287 | static int echo_flag; | |
2288 | static int echo_now; | |
2289 | ||
2290 | /* Read a character like read_char but optionally prompt based on maps | |
2291 | LOCAL and GLOBAL. | |
2292 | ||
2293 | The prompting is done based on the prompt-string of the map | |
2294 | and the strings associated with various map elements. */ | |
2295 | ||
2296 | Lisp_Object | |
2297 | read_char_menu_prompt (prompt, local, global) | |
2298 | int prompt; | |
2299 | Lisp_Object local, global; | |
2300 | { | |
2301 | register Lisp_Object rest, name; | |
2302 | Lisp_Object hmap; | |
2303 | int nlength; | |
2304 | int width = SCREEN_WIDTH (selected_screen) - 4; | |
2305 | char *menu = (char *) alloca (width); | |
2306 | ||
2307 | /* Use local over global Menu maps */ | |
2308 | ||
2309 | if (menu_prompting) | |
2310 | return read_char (!prompt); | |
2311 | ||
2312 | /* We can't get prompt strings from dense keymaps. */ | |
2313 | if (CONSP (local) | |
2314 | && EQ (Fcar (local), Qkeymap) | |
2315 | && !(CONSP (XCONS (local)->cdr) | |
2316 | && XTYPE (XCONS (XCONS (local)->cdr)->car) == Lisp_Vector)) | |
2317 | hmap = local; | |
2318 | else if (CONSP (global) | |
2319 | && EQ (Fcar (global), Qkeymap) | |
2320 | && !(CONSP (XCONS (global)->cdr) | |
2321 | && XTYPE (XCONS (XCONS (global)->cdr)->car) == Lisp_Vector)) | |
2322 | hmap = global; | |
2323 | else | |
2324 | return read_char (!prompt); | |
2325 | ||
2326 | /* Get the map's prompt string. */ | |
2327 | name = map_prompt (hmap); | |
2328 | if (NILP (name)) | |
2329 | return read_char (!prompt); | |
2330 | ||
2331 | /* Prompt string always starts with map's prompt, and a space. */ | |
2332 | strcpy (menu, XSTRING (name)->data); | |
2333 | nlength = XSTRING (name)->size; | |
2334 | menu[nlength++] = ' '; | |
2335 | menu[nlength] = 0; | |
2336 | ||
2337 | /* Start prompting at start of map. */ | |
2338 | rest = hmap; /* Current menu item */ | |
2339 | ||
2340 | /* Present the documented bindings, a line at a time. */ | |
2341 | while (1) | |
2342 | { | |
2343 | int notfirst = 0; | |
2344 | int i = nlength; | |
2345 | Lisp_Object obj; | |
2346 | int ch; | |
2347 | ||
2348 | /* If reached end of map, start at beginning. */ | |
2349 | if (NILP (Fcdr (rest))) rest = hmap; | |
2350 | ||
2351 | /* Loop over elements of map. */ | |
2352 | while (!NILP (rest) && i < width) | |
2353 | { | |
2354 | Lisp_Object s; | |
2355 | ||
2356 | /* Look for conses whose cadrs are strings. */ | |
2357 | s = Fcar_safe (Fcdr_safe (Fcar_safe (rest))); | |
2358 | if (XTYPE (s) != Lisp_String) | |
2359 | /* Ignore all other elements. */ | |
2360 | ; | |
2361 | /* If first such element, or enough room, add string to prompt. */ | |
2362 | else if (XSTRING (s)->size + i < width | |
2363 | || !notfirst) | |
2364 | { | |
2365 | int thiswidth; | |
2366 | ||
2367 | /* Punctuate between strings. */ | |
2368 | if (notfirst) | |
2369 | { | |
2370 | strcpy (menu + i, ", "); | |
2371 | i += 2; | |
2372 | } | |
2373 | notfirst = 1; | |
2374 | ||
2375 | /* Add as much of string as fits. */ | |
2376 | thiswidth = XSTRING (s)->size; | |
2377 | if (thiswidth + i > width) | |
2378 | thiswidth = width - i; | |
2379 | bcopy (XSTRING (s)->data, menu + i, thiswidth); | |
2380 | i += thiswidth; | |
2381 | } | |
2382 | else | |
2383 | { | |
2384 | /* If some elts don't fit, show there are more. */ | |
2385 | strcpy (menu + i, "..."); | |
2386 | break; | |
2387 | } | |
2388 | ||
2389 | /* Move past this element. */ | |
2390 | rest = Fcdr_safe (rest); | |
2391 | } | |
2392 | ||
2393 | /* Prompt with that and read response. */ | |
2394 | message1 (menu); | |
2395 | obj = read_char (1); | |
2396 | ||
2397 | if (XTYPE (obj) != Lisp_Int) | |
2398 | return obj; | |
2399 | else | |
2400 | ch = XINT (obj); | |
2401 | ||
2402 | if (obj != menu_prompt_more_char | |
2403 | && (XTYPE (menu_prompt_more_char) != Lisp_Int | |
2404 | || obj != make_number (Ctl (XINT (menu_prompt_more_char))))) | |
2405 | return obj; | |
2406 | } | |
2407 | } | |
2408 | ||
2409 | \f | |
2410 | /* Reading key sequences. */ | |
2411 | ||
2412 | /* Follow KEY in the maps in CURRENT[0..NMAPS-1], placing its bindings | |
2413 | in DEFS[0..NMAPS-1]. Set NEXT[i] to DEFS[i] if DEFS[i] is a | |
2414 | keymap, or nil otherwise. Return the index of the first keymap in | |
2415 | which KEY has any binding, or NMAPS if no map has a binding. | |
2416 | ||
2417 | If KEY is a meta ASCII character, treat it like meta-prefix-char | |
2418 | followed by the corresponding non-meta character. Keymaps in | |
2419 | CURRENT with non-prefix bindings for meta-prefix-char become nil in | |
2420 | NEXT. | |
2421 | ||
2422 | When KEY is not defined in any of the keymaps, if it is an upper | |
2423 | case letter and there are bindings for the corresponding lower-case | |
2424 | letter, return the bindings for the lower-case letter. | |
2425 | ||
2426 | NEXT may == CURRENT. */ | |
2427 | ||
2428 | static int | |
2429 | follow_key (key, nmaps, current, defs, next) | |
2430 | Lisp_Object key; | |
2431 | Lisp_Object *current, *defs, *next; | |
2432 | int nmaps; | |
2433 | { | |
2434 | int i, first_binding; | |
2435 | ||
2436 | /* If KEY is a meta ASCII character, treat it like meta-prefix-char | |
2437 | followed by the corresponding non-meta character. */ | |
2438 | if (XTYPE (key) == Lisp_Int | |
2439 | && XINT (key) >= 0200) | |
2440 | { | |
2441 | for (i = 0; i < nmaps; i++) | |
2442 | if (! NILP (current[i])) | |
2443 | { | |
2444 | next[i] = get_keyelt (access_keymap (current[i], | |
2445 | meta_prefix_char)); | |
2446 | ||
2447 | /* Note that since we pass the resulting bindings through | |
2448 | get_keymap_1, non-prefix bindings for meta-prefix-char | |
2449 | disappear. */ | |
2450 | next[i] = get_keymap_1 (next[i], 0); | |
2451 | } | |
2452 | else | |
2453 | next[i] = Qnil; | |
2454 | ||
2455 | current = next; | |
2456 | XSET (key, Lisp_Int, XFASTINT (key) & 0177); | |
2457 | } | |
2458 | ||
2459 | first_binding = nmaps; | |
2460 | for (i = nmaps - 1; i >= 0; i--) | |
2461 | { | |
2462 | if (! NILP (current[i])) | |
2463 | { | |
2464 | defs[i] = get_keyelt (access_keymap (current[i], key)); | |
2465 | if (! NILP (defs[i])) | |
2466 | first_binding = i; | |
2467 | } | |
2468 | else | |
2469 | defs[i] = Qnil; | |
2470 | } | |
2471 | ||
2472 | /* When KEY is not defined in any of the keymaps, if it is an upper | |
2473 | case letter and there are bindings for the corresponding | |
2474 | lower-case letter, return the bindings for the lower-case letter. */ | |
2475 | if (first_binding == nmaps | |
2476 | && XTYPE (key) == Lisp_Int | |
2477 | && UPPERCASEP (XINT (key))) | |
2478 | { | |
2479 | XSETINT (key, DOWNCASE (XINT (key))); | |
2480 | ||
2481 | first_binding = nmaps; | |
2482 | for (i = nmaps - 1; i >= 0; i--) | |
2483 | { | |
2484 | if (! NILP (current[i])) | |
2485 | { | |
2486 | defs[i] = get_keyelt (access_keymap (current[i], key)); | |
2487 | if (! NILP (defs[i])) | |
2488 | first_binding = i; | |
2489 | } | |
2490 | else | |
2491 | defs[i] = Qnil; | |
2492 | } | |
2493 | } | |
2494 | ||
2495 | /* Given the set of bindings we've found, produce the next set of maps. */ | |
2496 | for (i = 0; i < nmaps; i++) | |
2497 | next[i] = NILP (defs[i]) ? Qnil : get_keymap_1 (defs[i], 0); | |
2498 | ||
2499 | return first_binding; | |
2500 | } | |
2501 | ||
2502 | /* Read a sequence of keys that ends with a non prefix character | |
2503 | according to the keymaps in KEYMAPS[0..nmaps-1]. Keymaps appearing | |
2504 | earlier in KEYMAPS take precidence over those appearing later. | |
2505 | ||
2506 | Store the sequence in KEYBUF, a buffer of size BUFSIZE. Prompt | |
2507 | with PROMPT. Echo starting immediately unless `prompt' is 0. | |
2508 | Return the length of the key sequence stored. | |
2509 | ||
2510 | If the user switches screens in the midst of a key sequence, we | |
2511 | throw away any prefix we have read so far, and start afresh. For | |
2512 | mouse clicks, we look up the click in the keymap of the buffer | |
2513 | clicked on, throwing away any prefix if it is not the same buffer | |
2514 | we used to be reading from. */ | |
2515 | ||
2516 | static int | |
2517 | read_key_sequence (keybuf, bufsize, prompt) | |
2518 | Lisp_Object *keybuf; | |
2519 | int bufsize; | |
2520 | Lisp_Object prompt; | |
2521 | { | |
2522 | /* How many keys there are in the current key sequence. */ | |
2523 | int t; | |
2524 | ||
2525 | /* The buffer that the most recently read event was typed at. This | |
2526 | helps us read mouse clicks according to the buffer clicked in, | |
2527 | and notice when the mouse has moved from one screen to another. */ | |
2528 | struct buffer *last_event_buffer = current_buffer; | |
2529 | ||
2530 | /* The length of the echo buffer when we started reading, and | |
2531 | the length of this_command_keys when we started reading. */ | |
2532 | int echo_start; | |
2533 | int keys_start = this_command_key_count; | |
2534 | ||
2535 | /* The number of keymaps we're scanning right now, and the number of | |
2536 | keymaps we have allocated space for. */ | |
2537 | int nmaps; | |
2538 | int nmaps_allocated = 0; | |
2539 | ||
2540 | /* current[0..nmaps-1] are the prefix definitions of KEYBUF[0..t-1] | |
2541 | in the current keymaps, or nil where it is not a prefix. */ | |
2542 | Lisp_Object *current; | |
2543 | ||
2544 | /* defs[0..nmaps-1] are the definitions of KEYBUF[0..t-1] in | |
2545 | the current keymaps. */ | |
2546 | Lisp_Object *defs; | |
2547 | ||
2548 | /* The lowest i such that defs[i] is non-nil. */ | |
2549 | int first_binding; | |
2550 | ||
2551 | /* If mock_input > t, then KEYBUF[t] should be read as the next | |
2552 | input key. */ | |
2553 | int mock_input = 0; | |
2554 | ||
2555 | /* If the sequence is unbound in current[], keymap[fkey_start..fkey_end-1] | |
2556 | is a prefix in Vfunction_key_map, and fkey_map is its binding. | |
2557 | These might be > t, indicating that all function key scanning should | |
2558 | hold off until t reaches them. */ | |
2559 | int fkey_start = 0, fkey_end = 0; | |
2560 | Lisp_Object fkey_map = Vfunction_key_map; | |
2561 | ||
2562 | if (INTERACTIVE) | |
2563 | { | |
2564 | if (prompt) | |
2565 | echo_prompt (prompt); | |
2566 | else if (cursor_in_echo_area) | |
2567 | /* This doesn't put in a dash if the echo buffer is empty, so | |
2568 | you don't always see a dash hanging out in the minibuffer. */ | |
2569 | echo_dash (); | |
2570 | echo_start = echo_length (); | |
2571 | } | |
2572 | ||
2573 | /* If there is no function key map, turn of function key scanning. */ | |
2574 | if (NILP (Fkeymapp (Vfunction_key_map))) | |
2575 | fkey_start = fkey_end = bufsize + 1; | |
2576 | ||
2577 | restart: | |
2578 | t = 0; | |
2579 | this_command_key_count = keys_start; | |
2580 | ||
2581 | { | |
2582 | Lisp_Object *maps; | |
2583 | ||
2584 | nmaps = current_minor_maps (0, &maps) + 2; | |
2585 | if (nmaps > nmaps_allocated) | |
2586 | { | |
2587 | current = (Lisp_Object *) alloca (nmaps * sizeof (current[0])); | |
2588 | defs = (Lisp_Object *) alloca (nmaps * sizeof (defs[0])); | |
2589 | nmaps_allocated = nmaps; | |
2590 | } | |
2591 | bcopy (maps, current, (nmaps - 2) * sizeof (current[0])); | |
2592 | current[nmaps-2] = last_event_buffer->keymap; | |
2593 | current[nmaps-1] = global_map; | |
2594 | } | |
2595 | ||
2596 | /* Find an accurate initial value for first_binding. */ | |
2597 | for (first_binding = 0; first_binding < nmaps; first_binding++) | |
2598 | if (! NILP (current[first_binding])) | |
2599 | break; | |
2600 | ||
2601 | while ((first_binding < nmaps && ! NILP (current[first_binding])) | |
2602 | || (first_binding >= nmaps && fkey_start < t)) | |
2603 | { | |
2604 | Lisp_Object key; | |
2605 | ||
2606 | if (t >= bufsize) | |
2607 | error ("key sequence too long"); | |
2608 | ||
2609 | /* Are we reading keys stuffed into keybuf? */ | |
2610 | if (t < mock_input) | |
2611 | { | |
2612 | key = keybuf[t]; | |
2613 | add_command_key (key); | |
2614 | echo_char (key); | |
2615 | } | |
2616 | /* Otherwise, we should actually read a character. */ | |
2617 | else | |
2618 | { | |
2619 | struct buffer *buf; | |
2620 | ||
2621 | if (!prompt && INTERACTIVE) | |
2622 | key = read_char_menu_prompt (prompt, Qnil, Qnil); | |
2623 | else | |
2624 | key = read_char (!prompt); | |
2625 | ||
2626 | /* The above routines return -1 at the end of a macro. | |
2627 | Emacs 18 handles this by returning immediately with a | |
2628 | zero, so that's what we'll do. */ | |
2629 | if (XTYPE (key) == Lisp_Int && XINT (key) < 0) | |
2630 | return 0; | |
2631 | ||
2632 | Vquit_flag = Qnil; | |
2633 | ||
2634 | /* What buffer was this event typed/moused at? */ | |
2635 | if (XTYPE (key) == Lisp_Int || XTYPE (key) == Lisp_Symbol) | |
2636 | buf = (XBUFFER | |
2637 | (XWINDOW | |
2638 | (SCREEN_SELECTED_WINDOW | |
2639 | (XSCREEN (Vlast_event_screen)))->buffer)); | |
2640 | else if (EVENT_HAS_PARAMETERS (key)) | |
2641 | { | |
2642 | Lisp_Object window = EVENT_WINDOW (key); | |
2643 | ||
2644 | if (NILP (window)) | |
2645 | abort (); | |
2646 | ||
2647 | buf = XBUFFER (XWINDOW (window)->buffer); | |
2648 | } | |
2649 | else | |
2650 | abort (); | |
2651 | ||
2652 | /* If this event came to a different buffer than the one | |
2653 | we're currently in, switch buffers and start a new key | |
2654 | sequence, starting with key. */ | |
2655 | if (buf != last_event_buffer) | |
2656 | { | |
2657 | last_event_buffer = buf; | |
2658 | Fselect_screen (Vlast_event_screen, Qnil); | |
2659 | ||
2660 | /* Arrange to read key as the next event. */ | |
2661 | keybuf[0] = key; | |
2662 | mock_input = 1; | |
2663 | ||
2664 | /* Truncate the key sequence in the echo area. */ | |
2665 | if (INTERACTIVE) | |
2666 | echo_truncate (echo_start); | |
2667 | ||
2668 | goto restart; | |
2669 | } | |
2670 | } | |
2671 | ||
2672 | first_binding = (follow_key (key, | |
2673 | nmaps - first_binding, | |
2674 | current + first_binding, | |
2675 | defs + first_binding, | |
2676 | current + first_binding) | |
2677 | + first_binding); | |
2678 | keybuf[t++] = key; | |
2679 | ||
2680 | /* If the sequence is unbound, see if we can hang a function key | |
2681 | off the end of it. Don't reread the expansion of a function key. */ | |
2682 | if (first_binding >= nmaps | |
2683 | && t > mock_input) | |
2684 | { | |
2685 | Lisp_Object fkey_next; | |
2686 | ||
2687 | /* Scan from fkey_end until we find a bound suffix. */ | |
2688 | while (fkey_end < t) | |
2689 | { | |
2690 | fkey_next = | |
2691 | get_keyelt (access_keymap (fkey_map, keybuf[fkey_end++])); | |
284f4730 | 2692 | /* If keybuf[fkey_start..fkey_next] is bound in the |
a764a753 JB |
2693 | function key map and it's a suffix of the current |
2694 | sequence (i.e. fkey_next == t), replace it with | |
2695 | the binding and restart with fkey_start at the end. */ | |
284f4730 JB |
2696 | if (XTYPE (fkey_next) == Lisp_Vector |
2697 | && fkey_end == t) | |
2698 | { | |
2699 | t = fkey_start + XVECTOR (fkey_next)->size; | |
2700 | if (t >= bufsize) | |
2701 | error ("key sequence too long"); | |
2702 | ||
2703 | bcopy (XVECTOR (fkey_next)->contents, | |
2704 | keybuf + fkey_start, | |
2705 | (t - fkey_start) * sizeof (keybuf[0])); | |
2706 | ||
2707 | mock_input = t; | |
2708 | fkey_start = fkey_end = t; | |
2709 | ||
2710 | /* Truncate the key sequence in the echo area. */ | |
2711 | if (INTERACTIVE) | |
2712 | echo_truncate (echo_start); | |
2713 | ||
2714 | goto restart; | |
2715 | } | |
2716 | ||
2717 | fkey_map = get_keymap_1 (fkey_next, 0); | |
2718 | ||
a764a753 JB |
2719 | /* If we no longer have a bound suffix, try a new positions for |
2720 | fkey_start. */ | |
284f4730 JB |
2721 | if (NILP (fkey_map)) |
2722 | { | |
2723 | fkey_end = ++fkey_start; | |
2724 | fkey_map = Vfunction_key_map; | |
2725 | } | |
2726 | } | |
2727 | } | |
2728 | } | |
2729 | ||
2730 | read_key_sequence_cmd = (first_binding < nmaps | |
2731 | ? defs[first_binding] | |
2732 | : Qnil); | |
2733 | ||
2734 | return t; | |
2735 | } | |
2736 | ||
2737 | DEFUN ("read-key-sequence", Fread_key_sequence, Sread_key_sequence, 1, 1, 0, | |
2738 | "Read a sequence of keystrokes and return as a string or vector.\n\ | |
2739 | The sequence is sufficient to specify a non-prefix command in the\n\ | |
2740 | current local and global maps.\n\ | |
2741 | \n\ | |
2742 | Arg PROMPT is a prompt string. If nil, do not prompt specially.\n\ | |
2743 | \n\ | |
2744 | If Emacs is running on multiple screens, switching between screens in\n\ | |
2745 | the midst of a keystroke will toss any prefix typed so far. A C-g\n\ | |
2746 | typed while in this function is treated like any other character, and\n\ | |
2747 | `quit-flag' is not set.") | |
2748 | (prompt) | |
2749 | Lisp_Object prompt; | |
2750 | { | |
2751 | Lisp_Object keybuf[30]; | |
2752 | register int i; | |
2753 | struct gcpro gcpro1, gcpro2; | |
2754 | ||
2755 | if (!NILP (prompt)) | |
2756 | CHECK_STRING (prompt, 0); | |
2757 | QUIT; | |
2758 | ||
2759 | bzero (keybuf, sizeof keybuf); | |
2760 | GCPRO1 (keybuf[0]); | |
2761 | gcpro1.nvars = (sizeof keybuf/sizeof (keybuf[0])); | |
2762 | ||
2763 | this_command_key_count = 0; | |
2764 | i = read_key_sequence (keybuf, (sizeof keybuf/sizeof (keybuf[0])), | |
2765 | NILP (prompt) ? 0 : XSTRING (prompt)->data); | |
2766 | ||
2767 | UNGCPRO; | |
2768 | return make_array (i, keybuf); | |
2769 | } | |
2770 | \f | |
2771 | DEFUN ("command-execute", Fcommand_execute, Scommand_execute, 1, 2, 0, | |
2772 | "Execute CMD as an editor command.\n\ | |
2773 | CMD must be a symbol that satisfies the `commandp' predicate.\n\ | |
2774 | Optional second arg RECORD-FLAG non-nil\n\ | |
2775 | means unconditionally put this command in `command-history'.\n\ | |
2776 | Otherwise, that is done only if an arg is read using the minibuffer.") | |
2777 | (cmd, record) | |
2778 | Lisp_Object cmd, record; | |
2779 | { | |
2780 | register Lisp_Object final; | |
2781 | register Lisp_Object tem; | |
2782 | Lisp_Object prefixarg; | |
2783 | struct backtrace backtrace; | |
2784 | extern int debug_on_next_call; | |
2785 | ||
2786 | prefixarg = Vprefix_arg, Vprefix_arg = Qnil; | |
2787 | Vcurrent_prefix_arg = prefixarg; | |
2788 | debug_on_next_call = 0; | |
2789 | ||
2790 | if (XTYPE (cmd) == Lisp_Symbol) | |
2791 | { | |
2792 | tem = Fget (cmd, Qdisabled); | |
2793 | if (!NILP (tem)) | |
2794 | return call1 (Vrun_hooks, Vdisabled_command_hook); | |
2795 | } | |
2796 | ||
2797 | while (1) | |
2798 | { | |
ffd56f97 | 2799 | final = Findirect_function (cmd); |
284f4730 JB |
2800 | |
2801 | if (CONSP (final) && (tem = Fcar (final), EQ (tem, Qautoload))) | |
2802 | do_autoload (final, cmd); | |
2803 | else | |
2804 | break; | |
2805 | } | |
2806 | ||
2807 | if (XTYPE (final) == Lisp_String | |
2808 | || XTYPE (final) == Lisp_Vector) | |
2809 | { | |
2810 | /* If requested, place the macro in the command history. For | |
2811 | other sorts of commands, call-interactively takes care of | |
2812 | this. */ | |
2813 | if (!NILP (record)) | |
2814 | Vcommand_history | |
2815 | = Fcons (Fcons (Qexecute_kbd_macro, | |
2816 | Fcons (final, Fcons (prefixarg, Qnil))), | |
2817 | Vcommand_history); | |
2818 | ||
2819 | return Fexecute_kbd_macro (final, prefixarg); | |
2820 | } | |
2821 | if (CONSP (final) || XTYPE (final) == Lisp_Subr | |
2822 | || XTYPE (final) == Lisp_Compiled) | |
2823 | { | |
2824 | backtrace.next = backtrace_list; | |
2825 | backtrace_list = &backtrace; | |
2826 | backtrace.function = &Qcall_interactively; | |
2827 | backtrace.args = &cmd; | |
2828 | backtrace.nargs = 1; | |
2829 | backtrace.evalargs = 0; | |
2830 | ||
2831 | tem = Fcall_interactively (cmd, record); | |
2832 | ||
2833 | backtrace_list = backtrace.next; | |
2834 | return tem; | |
2835 | } | |
2836 | return Qnil; | |
2837 | } | |
2838 | \f | |
2839 | #if 0 | |
2840 | DEFUN ("execute-mouse-event", Fexecute_mouse_event, Sexecute_mouse_event, | |
2841 | 1, 1, 0, | |
2842 | "Execute the definition of the mouse-click event EVENT.\n\ | |
2843 | The handler function is found by looking the event's key sequence up\n\ | |
2844 | in the buffer's local mouse map and in `global-mouse-map'.\n\ | |
2845 | \n\ | |
2846 | After running the handler, call the value of `mouse-event-function'\n\ | |
2847 | with EVENT as arg.") | |
2848 | (event) | |
2849 | Lisp_Object event; | |
2850 | { | |
2851 | Lisp_Object tem; | |
2852 | Lisp_Object mouse_cmd; | |
2853 | Lisp_Object keyseq, window, screen_part, pos, time; | |
2854 | ||
2855 | #ifndef HAVE_X11 | |
2856 | Vmouse_event = event; | |
2857 | #endif | |
2858 | ||
2859 | if (EQ (event, Qnil)) | |
2860 | { | |
2861 | bitch_at_user (); | |
2862 | return Qnil; | |
2863 | } | |
2864 | ||
2865 | CHECK_CONS (event, 0); | |
2866 | pos = Fcar (event); | |
2867 | window = Fcar (Fcdr (event)); | |
2868 | screen_part = Fcar (Fcdr (Fcdr (event))); | |
2869 | keyseq = Fcar (Fcdr (Fcdr (Fcdr (event)))); | |
2870 | time = Fcar (Fcdr (Fcdr (Fcdr (Fcdr (event))))); | |
2871 | CHECK_STRING (keyseq, 0); | |
2872 | CHECK_WINDOW (window, 0); | |
2873 | ||
2874 | /* Look up KEYSEQ in the buffer's local mouse map, then in global one. */ | |
2875 | ||
2876 | mouse_cmd = Qnil; | |
2877 | ||
2878 | if (!NILP (XWINDOW (window)->buffer)) | |
2879 | { | |
2880 | Lisp_Object local_map; | |
2881 | ||
2882 | local_map = XBUFFER (XWINDOW (window)->buffer)->mouse_map; | |
2883 | tem = Fkeymapp (local_map); | |
2884 | if (!NILP (tem)) | |
2885 | mouse_cmd = Flookup_key (local_map, keyseq); | |
2886 | /* A number as value means the key is too long; treat as undefined. */ | |
2887 | if (XTYPE (mouse_cmd) == Lisp_Int) | |
2888 | mouse_cmd = Qnil; | |
2889 | } | |
2890 | ||
2891 | tem = Fkeymapp (Vglobal_mouse_map); | |
2892 | if (NILP (mouse_cmd) && !NILP (tem)) | |
2893 | mouse_cmd = Flookup_key (Vglobal_mouse_map, keyseq); | |
2894 | if (XTYPE (mouse_cmd) == Lisp_Int) | |
2895 | mouse_cmd = Qnil; | |
2896 | ||
2897 | if (NILP (mouse_cmd)) | |
2898 | { | |
2899 | /* This button/shift combination is not defined. | |
2900 | If it is a button-down event, ring the bell. */ | |
2901 | #ifdef HAVE_X11 | |
2902 | if (XSTRING (keyseq)->data[XSTRING (keyseq)->size - 1] & 0x18 == 0) | |
2903 | #else | |
2904 | if (XSTRING (keyseq)->data[XSTRING (keyseq)->size - 1] & 4 == 0) | |
2905 | #endif | |
2906 | bitch_at_user (); | |
2907 | } | |
2908 | else | |
2909 | { | |
2910 | SCREEN_PTR s = XSCREEN (WINDOW_SCREEN (XWINDOW (window))); | |
2911 | ||
2912 | #ifndef HAVE_X11 | |
2913 | Vmouse_window = s->selected_window; | |
2914 | #endif /* HAVE_X11 */ | |
2915 | /* It's defined; call the definition. */ | |
2916 | Vprefix_arg = Qnil; | |
2917 | if (!NILP (screen_part)) | |
2918 | { | |
2919 | /* For a scroll-bar click, set the prefix arg | |
2920 | to the number of lines down from the top the click was. | |
2921 | Many scroll commands want to scroll by this many lines. */ | |
2922 | Lisp_Object position; | |
2923 | Lisp_Object length; | |
2924 | Lisp_Object offset; | |
2925 | ||
2926 | position = Fcar (pos); | |
2927 | length = Fcar (Fcdr (pos)); | |
2928 | offset = Fcar (Fcdr (Fcdr (pos))); | |
2929 | ||
2930 | if (XINT (length) != 0) | |
2931 | XSET (Vprefix_arg, Lisp_Int, | |
2932 | (SCREEN_HEIGHT (s) * (XINT (position) + XINT (offset)) | |
2933 | / (XINT (length) + 2 * XINT (offset)))); | |
2934 | } | |
2935 | Fcommand_execute (mouse_cmd, Qnil); | |
2936 | } | |
2937 | ||
2938 | if (!NILP (Vmouse_event_function)) /* Not `event' so no need for GCPRO */ | |
2939 | call1 (Vmouse_event_function, Vmouse_event); | |
2940 | return Qnil; | |
2941 | } | |
2942 | #endif | |
2943 | \f | |
2944 | DEFUN ("execute-extended-command", Fexecute_extended_command, Sexecute_extended_command, | |
2945 | 1, 1, "P", | |
2946 | "Read function name, then read its arguments and call it.") | |
2947 | (prefixarg) | |
2948 | Lisp_Object prefixarg; | |
2949 | { | |
2950 | Lisp_Object function; | |
2951 | char buf[40]; | |
2952 | Lisp_Object saved_keys; | |
2953 | struct gcpro gcpro1; | |
2954 | ||
2955 | saved_keys = Fthis_command_keys (); | |
2956 | buf[0] = 0; | |
2957 | GCPRO1 (saved_keys); | |
2958 | ||
2959 | if (EQ (prefixarg, Qminus)) | |
2960 | strcpy (buf, "- "); | |
2961 | else if (CONSP (prefixarg) && XINT (XCONS (prefixarg)->car) == 4) | |
2962 | strcpy (buf, "C-u "); | |
2963 | else if (CONSP (prefixarg) && XTYPE (XCONS (prefixarg)->car) == Lisp_Int) | |
2964 | sprintf (buf, "%d ", XINT (XCONS (prefixarg)->car)); | |
2965 | else if (XTYPE (prefixarg) == Lisp_Int) | |
2966 | sprintf (buf, "%d ", XINT (prefixarg)); | |
2967 | ||
2968 | /* This isn't strictly correct if execute-extended-command | |
2969 | is bound to anything else. Perhaps it should use | |
2970 | this_command_keys? */ | |
2971 | strcat (buf, "M-x "); | |
2972 | ||
2973 | /* Prompt with buf, and then read a string, completing from and | |
2974 | restricting to the set of all defined commands. Don't provide | |
2975 | any initial input. The last Qnil says not to perform a | |
2976 | peculiar hack on the initial input. */ | |
2977 | function = Fcompleting_read (build_string (buf), | |
2978 | Vobarray, Qcommandp, | |
2979 | Qt, Qnil, Qnil); | |
2980 | ||
2981 | /* Add the text read to this_command_keys. */ | |
2982 | { | |
2983 | struct Lisp_String *func_str = XSTRING (function); | |
2984 | int i; | |
2985 | Lisp_Object tem; | |
2986 | ||
2987 | for (i = 0; i < func_str->size; i++) | |
2988 | { | |
2989 | XSET (tem, Lisp_Int, func_str->data[i]); | |
2990 | add_command_key (tem); | |
2991 | } | |
2992 | } | |
2993 | ||
2994 | UNGCPRO; | |
2995 | ||
2996 | function = Fintern (function, Vobarray); | |
2997 | Vprefix_arg = prefixarg; | |
2998 | this_command = function; | |
2999 | ||
3000 | return Fcommand_execute (function, Qt); | |
3001 | } | |
3002 | \f | |
3003 | ||
3004 | detect_input_pending () | |
3005 | { | |
3006 | if (!input_pending) | |
3007 | get_input_pending (&input_pending); | |
3008 | ||
3009 | return input_pending; | |
3010 | } | |
3011 | ||
ffd56f97 JB |
3012 | /* This is called in some cases before a possible quit. |
3013 | It cases the next call to detect_input_pending to recompute input_pending. | |
3014 | So calling this function unnecessarily can't do any harm. */ | |
3015 | clear_input_pending () | |
3016 | { | |
3017 | input_pending = 0; | |
3018 | } | |
3019 | ||
284f4730 JB |
3020 | DEFUN ("input-pending-p", Finput_pending_p, Sinput_pending_p, 0, 0, 0, |
3021 | "T if command input is currently available with no waiting.\n\ | |
3022 | Actually, the value is nil only if we can be sure that no input is available.") | |
3023 | () | |
3024 | { | |
3025 | if (!NILP (unread_command_char)) | |
3026 | return (Qt); | |
3027 | ||
3028 | return detect_input_pending () ? Qt : Qnil; | |
3029 | } | |
3030 | ||
3031 | DEFUN ("recent-keys", Frecent_keys, Srecent_keys, 0, 0, 0, | |
3032 | "Return vector of last 100 chars read from terminal.") | |
3033 | () | |
3034 | { | |
3035 | Lisp_Object val; | |
3036 | ||
3037 | if (total_keys < NUM_RECENT_KEYS) | |
3038 | return Fvector (total_keys, recent_keys); | |
3039 | else | |
3040 | { | |
3041 | val = Fvector (NUM_RECENT_KEYS, recent_keys); | |
3042 | bcopy (recent_keys + recent_keys_index, | |
3043 | XVECTOR (val)->contents, | |
3044 | (NUM_RECENT_KEYS - recent_keys_index) * sizeof (Lisp_Object)); | |
3045 | bcopy (recent_keys, | |
3046 | XVECTOR (val)->contents + NUM_RECENT_KEYS - recent_keys_index, | |
3047 | recent_keys_index * sizeof (Lisp_Object)); | |
3048 | return val; | |
3049 | } | |
3050 | } | |
3051 | ||
3052 | DEFUN ("this-command-keys", Fthis_command_keys, Sthis_command_keys, 0, 0, 0, | |
3053 | "Return string of the keystrokes that invoked this command.") | |
3054 | () | |
3055 | { | |
3056 | return make_array (this_command_key_count, this_command_keys); | |
3057 | } | |
3058 | ||
3059 | DEFUN ("recursion-depth", Frecursion_depth, Srecursion_depth, 0, 0, 0, | |
3060 | "Return the current depth in recursive edits.") | |
3061 | () | |
3062 | { | |
3063 | Lisp_Object temp; | |
3064 | XFASTINT (temp) = command_loop_level + minibuf_level; | |
3065 | return temp; | |
3066 | } | |
3067 | ||
3068 | DEFUN ("open-dribble-file", Fopen_dribble_file, Sopen_dribble_file, 1, 1, | |
3069 | "FOpen dribble file: ", | |
3070 | "Start writing all keyboard characters to FILE.") | |
3071 | (file) | |
3072 | Lisp_Object file; | |
3073 | { | |
3074 | if (NILP (file)) | |
3075 | { | |
3076 | fclose (dribble); | |
3077 | dribble = 0; | |
3078 | } | |
3079 | else | |
3080 | { | |
3081 | file = Fexpand_file_name (file, Qnil); | |
3082 | dribble = fopen (XSTRING (file)->data, "w"); | |
3083 | } | |
3084 | return Qnil; | |
3085 | } | |
3086 | ||
3087 | DEFUN ("discard-input", Fdiscard_input, Sdiscard_input, 0, 0, 0, | |
3088 | "Discard the contents of the terminal input buffer.\n\ | |
3089 | Also cancel any kbd macro being defined.") | |
3090 | () | |
3091 | { | |
3092 | defining_kbd_macro = 0; | |
3093 | update_mode_lines++; | |
3094 | ||
3095 | #if 0 | |
3096 | unread_command_char = make_number (-1); | |
3097 | #endif | |
3098 | unread_command_char = Qnil; | |
3099 | ||
3100 | discard_tty_input (); | |
3101 | ||
3102 | kbd_fetch_ptr = kbd_store_ptr; | |
3103 | input_pending = 0; | |
3104 | ||
3105 | return Qnil; | |
3106 | } | |
3107 | \f | |
3108 | DEFUN ("suspend-emacs", Fsuspend_emacs, Ssuspend_emacs, 0, 1, "", | |
3109 | "Stop Emacs and return to superior process. You can resume later.\n\ | |
3110 | On systems that don't have job control, run a subshell instead.\n\n\ | |
3111 | If optional arg STUFFSTRING is non-nil, its characters are stuffed\n\ | |
3112 | to be read as terminal input by Emacs's superior shell.\n\ | |
3113 | Before suspending, if `suspend-hook' is bound and value is non-nil\n\ | |
3114 | call the value as a function of no args. Don't suspend if it returns non-nil.\n\ | |
3115 | Otherwise, suspend normally and after resumption call\n\ | |
3116 | `suspend-resume-hook' if that is bound and non-nil.\n\ | |
3117 | \n\ | |
3118 | Some operating systems cannot stop the Emacs process and resume it later.\n\ | |
3119 | On such systems, Emacs will start a subshell and wait for it to exit.") | |
3120 | (stuffstring) | |
3121 | Lisp_Object stuffstring; | |
3122 | { | |
3123 | register Lisp_Object tem; | |
3124 | int count = specpdl_ptr - specpdl; | |
3125 | int old_height, old_width; | |
3126 | int width, height; | |
3127 | struct gcpro gcpro1; | |
3128 | extern init_sys_modes (); | |
3129 | ||
3130 | if (!NILP (stuffstring)) | |
3131 | CHECK_STRING (stuffstring, 0); | |
3132 | GCPRO1 (stuffstring); | |
3133 | ||
3134 | /* Call value of suspend-hook | |
3135 | if it is bound and value is non-nil. */ | |
3136 | if (!NILP (Vrun_hooks)) | |
3137 | { | |
3138 | tem = call1 (Vrun_hooks, intern ("suspend-hook")); | |
3139 | if (!EQ (tem, Qnil)) return Qnil; | |
3140 | } | |
3141 | ||
3142 | get_screen_size (&old_width, &old_height); | |
3143 | reset_sys_modes (); | |
3144 | /* sys_suspend can get an error if it tries to fork a subshell | |
3145 | and the system resources aren't available for that. */ | |
3146 | record_unwind_protect (init_sys_modes, 0); | |
3147 | stuff_buffered_input (stuffstring); | |
3148 | sys_suspend (); | |
3149 | unbind_to (count, Qnil); | |
3150 | ||
3151 | /* Check if terminal/window size has changed. | |
3152 | Note that this is not useful when we are running directly | |
3153 | with a window system; but suspend should be disabled in that case. */ | |
3154 | get_screen_size (&width, &height); | |
3155 | if (width != old_width || height != old_height) | |
3156 | change_screen_size (height, width, 0); | |
3157 | ||
3158 | /* Call value of suspend-resume-hook | |
3159 | if it is bound and value is non-nil. */ | |
3160 | if (!NILP (Vrun_hooks)) | |
3161 | call1 (Vrun_hooks, intern ("suspend-resume-hook")); | |
3162 | ||
3163 | UNGCPRO; | |
3164 | return Qnil; | |
3165 | } | |
3166 | ||
3167 | /* If STUFFSTRING is a string, stuff its contents as pending terminal input. | |
3168 | Then in any case stuff anthing Emacs has read ahead and not used. */ | |
3169 | ||
3170 | stuff_buffered_input (stuffstring) | |
3171 | Lisp_Object stuffstring; | |
3172 | { | |
3173 | register unsigned char *p; | |
3174 | ||
3175 | /* stuff_char works only in BSD, versions 4.2 and up. */ | |
3176 | #ifdef BSD | |
3177 | #ifndef BSD4_1 | |
3178 | if (XTYPE (stuffstring) == Lisp_String) | |
3179 | { | |
3180 | register int count; | |
3181 | ||
3182 | p = XSTRING (stuffstring)->data; | |
3183 | count = XSTRING (stuffstring)->size; | |
3184 | while (count-- > 0) | |
3185 | stuff_char (*p++); | |
3186 | stuff_char ('\n'); | |
3187 | } | |
3188 | /* Anything we have read ahead, put back for the shell to read. */ | |
3189 | while (kbd_fetch_ptr != kbd_store_ptr) | |
3190 | { | |
3191 | if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE) | |
3192 | kbd_fetch_ptr = kbd_buffer; | |
3193 | if (kbd_fetch_ptr->kind == ascii_keystroke) | |
3194 | stuff_char (XINT (kbd_fetch_ptr->code)); | |
3195 | kbd_fetch_ptr++; | |
3196 | } | |
3197 | input_pending = 0; | |
3198 | #endif | |
3199 | #endif /* BSD and not BSD4_1 */ | |
3200 | } | |
3201 | \f | |
ffd56f97 JB |
3202 | set_waiting_for_input (time_to_clear) |
3203 | EMACS_TIME *time_to_clear; | |
284f4730 | 3204 | { |
ffd56f97 | 3205 | input_available_clear_time = time_to_clear; |
284f4730 JB |
3206 | |
3207 | /* Tell interrupt_signal to throw back to read_char, */ | |
3208 | waiting_for_input = 1; | |
3209 | ||
3210 | /* If interrupt_signal was called before and buffered a C-g, | |
3211 | make it run again now, to avoid timing error. */ | |
3212 | if (!NILP (Vquit_flag)) | |
3213 | quit_throw_to_read_char (); | |
3214 | ||
3215 | /* If alarm has gone off already, echo now. */ | |
3216 | if (echo_flag) | |
3217 | { | |
3218 | echo (); | |
3219 | echo_flag = 0; | |
3220 | } | |
3221 | } | |
3222 | ||
3223 | clear_waiting_for_input () | |
3224 | { | |
3225 | /* Tell interrupt_signal not to throw back to read_char, */ | |
3226 | waiting_for_input = 0; | |
ffd56f97 | 3227 | input_available_clear_time = 0; |
284f4730 JB |
3228 | } |
3229 | ||
3230 | /* This routine is called at interrupt level in response to C-G. | |
3231 | If interrupt_input, this is the handler for SIGINT. | |
3232 | Otherwise, it is called from kbd_buffer_store_event, | |
3233 | in handling SIGIO or SIGTINT. | |
3234 | ||
3235 | If `waiting_for_input' is non zero, then unless `echoing' is nonzero, | |
3236 | immediately throw back to read_char. | |
3237 | ||
3238 | Otherwise it sets the Lisp variable quit-flag not-nil. | |
3239 | This causes eval to throw, when it gets a chance. | |
3240 | If quit-flag is already non-nil, it stops the job right away. */ | |
3241 | ||
3242 | SIGTYPE | |
3243 | interrupt_signal () | |
3244 | { | |
3245 | char c; | |
3246 | /* Must preserve main program's value of errno. */ | |
3247 | int old_errno = errno; | |
3248 | extern Lisp_Object Vwindow_system; | |
3249 | ||
3250 | #ifdef USG | |
3251 | /* USG systems forget handlers when they are used; | |
3252 | must reestablish each time */ | |
3253 | signal (SIGINT, interrupt_signal); | |
3254 | signal (SIGQUIT, interrupt_signal); | |
3255 | #endif /* USG */ | |
3256 | ||
3257 | cancel_echoing (); | |
3258 | ||
3259 | if (!NILP (Vquit_flag) && SCREEN_IS_TERMCAP (selected_screen)) | |
3260 | { | |
3261 | fflush (stdout); | |
3262 | reset_sys_modes (); | |
3263 | sigfree (); | |
3264 | #ifdef SIGTSTP /* Support possible in later USG versions */ | |
3265 | /* | |
3266 | * On systems which can suspend the current process and return to the original | |
3267 | * shell, this command causes the user to end up back at the shell. | |
3268 | * The "Auto-save" and "Abort" questions are not asked until | |
3269 | * the user elects to return to emacs, at which point he can save the current | |
3270 | * job and either dump core or continue. | |
3271 | */ | |
3272 | sys_suspend (); | |
3273 | #else | |
3274 | #ifdef VMS | |
3275 | if (sys_suspend () == -1) | |
3276 | { | |
3277 | printf ("Not running as a subprocess;\n"); | |
3278 | printf ("you can continue or abort.\n"); | |
3279 | } | |
3280 | #else /* not VMS */ | |
3281 | /* Perhaps should really fork an inferior shell? | |
3282 | But that would not provide any way to get back | |
3283 | to the original shell, ever. */ | |
3284 | printf ("No support for stopping a process on this operating system;\n"); | |
3285 | printf ("you can continue or abort.\n"); | |
3286 | #endif /* not VMS */ | |
3287 | #endif /* not SIGTSTP */ | |
3288 | printf ("Auto-save? (y or n) "); | |
3289 | fflush (stdout); | |
3290 | if (((c = getchar ()) & ~040) == 'Y') | |
3291 | Fdo_auto_save (Qnil, Qnil); | |
3292 | while (c != '\n') c = getchar (); | |
3293 | #ifdef VMS | |
3294 | printf ("Abort (and enter debugger)? (y or n) "); | |
3295 | #else /* not VMS */ | |
3296 | printf ("Abort (and dump core)? (y or n) "); | |
3297 | #endif /* not VMS */ | |
3298 | fflush (stdout); | |
3299 | if (((c = getchar ()) & ~040) == 'Y') | |
3300 | abort (); | |
3301 | while (c != '\n') c = getchar (); | |
3302 | printf ("Continuing...\n"); | |
3303 | fflush (stdout); | |
3304 | init_sys_modes (); | |
3305 | } | |
3306 | else | |
3307 | { | |
3308 | /* If executing a function that wants to be interrupted out of | |
3309 | and the user has not deferred quitting by binding `inhibit-quit' | |
3310 | then quit right away. */ | |
3311 | if (immediate_quit && NILP (Vinhibit_quit)) | |
3312 | { | |
3313 | immediate_quit = 0; | |
3314 | sigfree (); | |
3315 | Fsignal (Qquit, Qnil); | |
3316 | } | |
3317 | else | |
3318 | /* Else request quit when it's safe */ | |
3319 | Vquit_flag = Qt; | |
3320 | } | |
3321 | ||
3322 | if (waiting_for_input && !echoing) | |
3323 | quit_throw_to_read_char (); | |
3324 | ||
3325 | errno = old_errno; | |
3326 | } | |
3327 | ||
3328 | /* Handle a C-g by making read_char return C-g. */ | |
3329 | ||
3330 | quit_throw_to_read_char () | |
3331 | { | |
3332 | quit_error_check (); | |
3333 | sigfree (); | |
3334 | /* Prevent another signal from doing this before we finish. */ | |
f76475ad | 3335 | clear_waiting_for_input (); |
284f4730 JB |
3336 | input_pending = 0; |
3337 | ||
3338 | #if 0 | |
3339 | unread_command_char = make_number (-1); | |
3340 | #endif | |
3341 | unread_command_char = Qnil; | |
3342 | ||
3343 | _longjmp (getcjmp, 1); | |
3344 | } | |
3345 | \f | |
3346 | DEFUN ("set-input-mode", Fset_input_mode, Sset_input_mode, 3, 4, 0, | |
3347 | "Set mode of reading keyboard input.\n\ | |
3348 | First arg non-nil means use input interrupts; nil means use CBREAK mode.\n\ | |
3349 | Second arg non-nil means use ^S/^Q flow control for output to terminal\n\ | |
3350 | (no effect except in CBREAK mode).\n\ | |
3351 | Third arg non-nil means accept 8-bit input (for a Meta key).\n\ | |
3352 | Otherwise, the top bit is ignored, on the assumption it is parity.\n\ | |
3353 | Optional fourth arg non-nil specifies character to use for quitting.") | |
3354 | (interrupt, flow, meta, quit) | |
3355 | Lisp_Object interrupt, flow, meta, quit; | |
3356 | { | |
3357 | if (!NILP (quit) | |
3358 | && (XTYPE (quit) != Lisp_Int | |
3359 | || XINT (quit) < 0 || XINT (quit) > 0400)) | |
3360 | error ("set-input-mode: QUIT must be an ASCII character."); | |
3361 | ||
3362 | reset_sys_modes (); | |
3363 | #ifdef SIGIO | |
3364 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
3365 | #ifdef NO_SOCK_SIGIO | |
3366 | if (read_socket_hook) | |
3367 | interrupt_input = 0; /* No interrupts if reading from a socket. */ | |
3368 | else | |
3369 | #endif /* NO_SOCK_SIGIO */ | |
3370 | interrupt_input = !NILP (interrupt); | |
3371 | #else /* not SIGIO */ | |
3372 | interrupt_input = 0; | |
3373 | #endif /* not SIGIO */ | |
3374 | /* Our VMS input only works by interrupts, as of now. */ | |
3375 | #ifdef VMS | |
3376 | interrupt_input = 1; | |
3377 | #endif | |
3378 | flow_control = !NILP (flow); | |
3379 | meta_key = !NILP (meta); | |
3380 | if (!NILP (quit)) | |
3381 | /* Don't let this value be out of range. */ | |
3382 | quit_char = XINT (quit) & (meta_key ? 0377 : 0177); | |
3383 | ||
3384 | init_sys_modes (); | |
3385 | return Qnil; | |
3386 | } | |
3387 | \f | |
3388 | init_keyboard () | |
3389 | { | |
3390 | this_command_keys_size = 40; | |
3391 | this_command_keys = | |
3392 | (Lisp_Object *) xmalloc (this_command_keys_size * sizeof (Lisp_Object)); | |
3393 | ||
3394 | /* This is correct before outermost invocation of the editor loop */ | |
3395 | command_loop_level = -1; | |
3396 | immediate_quit = 0; | |
3397 | quit_char = Ctl ('g'); | |
3398 | unread_command_char = Qnil; | |
3399 | recent_keys_index = 0; | |
3400 | total_keys = 0; | |
3401 | kbd_fetch_ptr = kbd_buffer; | |
3402 | kbd_store_ptr = kbd_buffer; | |
3403 | do_mouse_tracking = 0; | |
3404 | input_pending = 0; | |
3405 | ||
3406 | if (!noninteractive) | |
3407 | { | |
3408 | signal (SIGINT, interrupt_signal); | |
3409 | #ifdef HAVE_TERMIO | |
3410 | /* For systems with SysV TERMIO, C-g is set up for both SIGINT and | |
3411 | SIGQUIT and we can't tell which one it will give us. */ | |
3412 | signal (SIGQUIT, interrupt_signal); | |
3413 | #endif /* HAVE_TERMIO */ | |
3414 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
3415 | #ifdef SIGIO | |
3416 | signal (SIGIO, input_available_signal); | |
3417 | #endif SIGIO | |
3418 | } | |
3419 | ||
3420 | /* Use interrupt input by default, if it works and noninterrupt input | |
3421 | has deficiencies. */ | |
3422 | ||
3423 | #ifdef INTERRUPT_INPUT | |
3424 | interrupt_input = 1; | |
3425 | #else | |
3426 | interrupt_input = 0; | |
3427 | #endif | |
3428 | ||
3429 | /* Our VMS input only works by interrupts, as of now. */ | |
3430 | #ifdef VMS | |
3431 | interrupt_input = 1; | |
3432 | #endif | |
3433 | ||
3434 | sigfree (); | |
3435 | dribble = 0; | |
3436 | ||
3437 | if (keyboard_init_hook) | |
3438 | (*keyboard_init_hook) (); | |
3439 | ||
3440 | #ifdef POLL_FOR_INPUT | |
3441 | poll_suppress_count = 1; | |
3442 | start_polling (); | |
3443 | #endif | |
3444 | } | |
3445 | ||
3446 | /* This type's only use is in syms_of_keyboard, to initialize the | |
3447 | event header symbols and put properties on them. */ | |
3448 | struct event_head { | |
3449 | Lisp_Object *var; | |
3450 | char *name; | |
3451 | Lisp_Object *kind; | |
3452 | }; | |
3453 | ||
3454 | struct event_head head_table[] = { | |
3455 | &Qmouse_movement, "mouse-movement", &Qmouse_movement, | |
3456 | &Qvscrollbar_part, "vscrollbar-part", &Qscrollbar_click, | |
3457 | &Qvslider_part, "vslider-part", &Qscrollbar_click, | |
3458 | &Qvthumbup_part, "vthumbup-part", &Qscrollbar_click, | |
3459 | &Qvthumbdown_part, "vthumbdown-part", &Qscrollbar_click, | |
3460 | &Qhscrollbar_part, "hscrollbar-part", &Qscrollbar_click, | |
3461 | &Qhslider_part, "hslider-part", &Qscrollbar_click, | |
3462 | &Qhthumbleft_part, "hthumbleft-part", &Qscrollbar_click, | |
3463 | &Qhthumbright_part,"hthumbright-part", &Qscrollbar_click | |
3464 | }; | |
3465 | ||
3466 | syms_of_keyboard () | |
3467 | { | |
3468 | Qself_insert_command = intern ("self-insert-command"); | |
3469 | staticpro (&Qself_insert_command); | |
3470 | ||
3471 | Qforward_char = intern ("forward-char"); | |
3472 | staticpro (&Qforward_char); | |
3473 | ||
3474 | Qbackward_char = intern ("backward-char"); | |
3475 | staticpro (&Qbackward_char); | |
3476 | ||
3477 | Qdisabled = intern ("disabled"); | |
3478 | staticpro (&Qdisabled); | |
3479 | ||
3480 | Qfunction_key = intern ("function-key"); | |
3481 | staticpro (&Qfunction_key); | |
3482 | Qmouse_movement = intern ("mouse-click"); | |
3483 | staticpro (&Qmouse_click); | |
3484 | Qmouse_movement = intern ("scrollbar-click"); | |
3485 | staticpro (&Qmouse_movement); | |
3486 | ||
3487 | Qmode_line = intern ("mode-line"); | |
3488 | staticpro (&Qmode_line); | |
3489 | Qvertical_split = intern ("vertical-split"); | |
3490 | staticpro (&Qvertical_split); | |
3491 | ||
3492 | Qevent_kind = intern ("event-type"); | |
3493 | staticpro (&Qevent_kind); | |
3494 | Qevent_unmodified = intern ("event-unmodified"); | |
3495 | staticpro (&Qevent_unmodified); | |
3496 | ||
3497 | { | |
3498 | struct event_head *p; | |
3499 | ||
3500 | for (p = head_table; | |
3501 | p < head_table + (sizeof (head_table) / sizeof (head_table[0])); | |
3502 | p++) | |
3503 | { | |
3504 | *p->var = intern (p->name); | |
3505 | staticpro (p->var); | |
3506 | Fput (*p->var, Qevent_kind, *p->kind); | |
3507 | Fput (*p->var, Qevent_unmodified, *p->var); | |
3508 | } | |
3509 | } | |
3510 | ||
3511 | func_key_syms = Qnil; | |
3512 | staticpro (&func_key_syms); | |
3513 | ||
3514 | mouse_syms = Qnil; | |
3515 | staticpro (&mouse_syms); | |
3516 | ||
3517 | defsubr (&Sread_key_sequence); | |
3518 | defsubr (&Srecursive_edit); | |
3519 | defsubr (&Strack_mouse); | |
3520 | defsubr (&Smouse_click_p); | |
3521 | defsubr (&Sinput_pending_p); | |
3522 | defsubr (&Scommand_execute); | |
3523 | defsubr (&Srecent_keys); | |
3524 | defsubr (&Sthis_command_keys); | |
3525 | defsubr (&Ssuspend_emacs); | |
3526 | defsubr (&Sabort_recursive_edit); | |
3527 | defsubr (&Sexit_recursive_edit); | |
3528 | defsubr (&Srecursion_depth); | |
3529 | defsubr (&Stop_level); | |
3530 | defsubr (&Sdiscard_input); | |
3531 | defsubr (&Sopen_dribble_file); | |
3532 | defsubr (&Sset_input_mode); | |
3533 | defsubr (&Sexecute_extended_command); | |
3534 | ||
3535 | DEFVAR_LISP ("disabled-command-hook", &Vdisabled_command_hook, | |
3536 | "Value is called instead of any command that is disabled\n\ | |
3537 | (has a non-nil `disabled' property)."); | |
3538 | ||
3539 | DEFVAR_LISP ("last-command-char", &last_command_char, | |
3540 | "Last terminal input key that was part of a command."); | |
3541 | ||
3542 | DEFVAR_LISP ("last-input-char", &last_input_char, | |
3543 | "Last terminal input key."); | |
3544 | ||
3545 | DEFVAR_LISP ("unread-command-char", &unread_command_char, | |
3546 | "Object to be read as next input from input stream, or nil if none."); | |
3547 | ||
3548 | DEFVAR_LISP ("meta-prefix-char", &meta_prefix_char, | |
3549 | "Meta-prefix character code. Meta-foo as command input\n\ | |
3550 | turns into this character followed by foo."); | |
3551 | XSET (meta_prefix_char, Lisp_Int, 033); | |
3552 | ||
3553 | DEFVAR_LISP ("last-command", &last_command, | |
3554 | "The last command executed. Normally a symbol with a function definition,\n\ | |
3555 | but can be whatever was found in the keymap, or whatever the variable\n\ | |
3556 | `this-command' was set to by that command."); | |
3557 | last_command = Qnil; | |
3558 | ||
3559 | DEFVAR_LISP ("this-command", &this_command, | |
3560 | "The command now being executed.\n\ | |
3561 | The command can set this variable; whatever is put here\n\ | |
3562 | will be in `last-command' during the following command."); | |
3563 | this_command = Qnil; | |
3564 | ||
3565 | DEFVAR_INT ("auto-save-interval", &auto_save_interval, | |
3566 | "*Number of keyboard input characters between auto-saves.\n\ | |
3567 | Zero means disable autosaving due to number of characters typed."); | |
3568 | auto_save_interval = 300; | |
3569 | ||
3570 | DEFVAR_LISP ("auto-save-timeout", &Vauto_save_timeout, | |
3571 | "*Number of seconds idle time before auto-save.\n\ | |
06ef7355 RS |
3572 | Zero or nil means disable auto-saving due to idleness.\n\ |
3573 | After auto-saving due to this many seconds of idle time,\n\ | |
3574 | Emacs also does a garbage collection if that seems to be warranted." | |
284f4730 JB |
3575 | XFASTINT (Vauto_save_timeout) = 30; |
3576 | ||
3577 | DEFVAR_INT ("echo-keystrokes", &echo_keystrokes, | |
3578 | "*Nonzero means echo unfinished commands after this many seconds of pause."); | |
3579 | echo_keystrokes = 1; | |
3580 | ||
3581 | DEFVAR_INT ("polling-period", &polling_period, | |
3582 | "*Interval between polling for input during Lisp execution.\n\ | |
3583 | The reason for polling is to make C-g work to stop a running program.\n\ | |
3584 | Polling is needed only when using X windows and SIGIO does not work.\n\ | |
3585 | Polling is automatically disabled in all other cases."); | |
3586 | polling_period = 2; | |
3587 | ||
3588 | DEFVAR_INT ("num-input-keys", &num_input_keys, | |
3589 | "*Number of complete keys read from the keyboard so far."); | |
3590 | num_input_keys = 0; | |
3591 | ||
3592 | DEFVAR_LISP ("last-event-screen", &Vlast_event_screen, | |
3593 | "*The screen in which the most recently read event occurred."); | |
3594 | Vlast_event_screen = Qnil; | |
3595 | ||
3596 | DEFVAR_LISP ("help-char", &help_char, | |
3597 | "Character to recognize as meaning Help.\n\ | |
3598 | When it is read, do `(eval help-form)', and display result if it's a string.\n\ | |
3599 | If the value of `help-form' is nil, this char can be read normally."); | |
3600 | XSET (help_char, Lisp_Int, Ctl ('H')); | |
3601 | ||
3602 | DEFVAR_LISP ("help-form", &Vhelp_form, | |
3603 | "Form to execute when character help-char is read.\n\ | |
3604 | If the form returns a string, that string is displayed.\n\ | |
3605 | If `help-form' is nil, the help char is not recognized."); | |
3606 | Vhelp_form = Qnil; | |
3607 | ||
3608 | DEFVAR_LISP ("top-level", &Vtop_level, | |
3609 | "Form to evaluate when Emacs starts up.\n\ | |
3610 | Useful to set before you dump a modified Emacs."); | |
3611 | Vtop_level = Qnil; | |
3612 | ||
3613 | DEFVAR_LISP ("keyboard-translate-table", &Vkeyboard_translate_table, | |
3614 | "String used as translate table for keyboard input, or nil.\n\ | |
3615 | Each character is looked up in this string and the contents used instead.\n\ | |
3616 | If string is of length N, character codes N and up are untranslated."); | |
3617 | Vkeyboard_translate_table = Qnil; | |
3618 | ||
3619 | #ifdef HAVE_X_WINDOWS | |
3620 | DEFVAR_LISP ("mouse-event-function", &Vmouse_event_function, | |
3621 | "Function to call for each mouse event, after the event's definition.\n\ | |
3622 | Called, if non-nil, with one argument, which is the event-list.\n\ | |
3623 | See the variable `mouse-event' for the format of this list."); | |
3624 | Vmouse_event_function = Qnil; | |
3625 | ||
3626 | DEFVAR_LISP ("mouse-left-hook", &Vmouse_left_hook, | |
3627 | "Function to call when mouse leaves window. No arguments."); | |
3628 | Vmouse_left_hook = Qnil; | |
3629 | ||
3630 | DEFVAR_LISP ("map-screen-hook", &Vmap_screen_hook, | |
3631 | "Function to call when screen is mapped. No arguments."); | |
3632 | Vmap_screen_hook = Qnil; | |
3633 | ||
3634 | DEFVAR_LISP ("unmap-screen-hook", &Vunmap_screen_hook, | |
3635 | "Function to call when screen is unmapped. No arguments."); | |
3636 | Vunmap_screen_hook = Qnil; | |
3637 | ||
3638 | DEFVAR_LISP ("mouse-motion-handler", &Vmouse_motion_handler, | |
3639 | "Handler for motion events. No arguments."); | |
3640 | Vmouse_motion_handler = Qnil; | |
3641 | #endif | |
3642 | ||
3643 | DEFVAR_BOOL ("menu-prompting", &menu_prompting, | |
3644 | "Non-nil means prompt with menus in echo area when appropriate.\n\ | |
3645 | This is done when reading from a keymap that has a prompt string,\n\ | |
3646 | for elements that have prompt strings."); | |
3647 | menu_prompting = 1; | |
3648 | ||
3649 | DEFVAR_LISP ("menu-prompt-more-char", &menu_prompt_more_char, | |
3650 | "Character to see next line of menu prompt.\n\ | |
3651 | Type this character while in a menu prompt to rotate around the lines of it."); | |
3652 | XSET (menu_prompt_more_char, Lisp_Int, ' '); | |
3653 | } | |
3654 | ||
3655 | keys_of_keyboard () | |
3656 | { | |
3657 | initial_define_key (global_map, Ctl ('Z'), "suspend-emacs"); | |
3658 | initial_define_key (control_x_map, Ctl ('Z'), "suspend-emacs"); | |
3659 | initial_define_key (meta_map, Ctl ('C'), "exit-recursive-edit"); | |
3660 | initial_define_key (global_map, Ctl (']'), "abort-recursive-edit"); | |
3661 | initial_define_key (meta_map, 'x', "execute-extended-command"); | |
3662 | } |