Commit | Line | Data |
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284f4730 | 1 | /* Keyboard and mouse input; editor command loop. |
519a3b65 | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1992 Free Software Foundation, Inc. |
284f4730 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 1, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | /* Allow config.h to undefine symbols found here. */ | |
21 | #include <signal.h> | |
22 | ||
23 | #include "config.h" | |
24 | #include <stdio.h> | |
25 | #undef NULL | |
26 | #include "termchar.h" | |
27 | #include "termopts.h" | |
28 | #include "lisp.h" | |
29 | #include "termhooks.h" | |
30 | #include "macros.h" | |
ff11dfa1 | 31 | #include "frame.h" |
284f4730 JB |
32 | #include "window.h" |
33 | #include "commands.h" | |
34 | #include "buffer.h" | |
35 | #include "disptab.h" | |
36 | #include "keyboard.h" | |
37 | #include <setjmp.h> | |
38 | #include <errno.h> | |
39 | ||
284f4730 JB |
40 | #ifndef VMS |
41 | #include <sys/ioctl.h> | |
284f4730 JB |
42 | #endif |
43 | ||
52baf19e 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 | ||
ff11dfa1 | 194 | /* Hook to call when mouse leaves frame. */ |
284f4730 JB |
195 | Lisp_Object Vmouse_left_hook; |
196 | ||
ff11dfa1 JB |
197 | /* Hook to call when a frame is mapped. */ |
198 | Lisp_Object Vmap_frame_hook; | |
284f4730 | 199 | |
ff11dfa1 JB |
200 | /* Hook to call when a frame is unmapped. */ |
201 | Lisp_Object Vunmap_frame_hook; | |
284f4730 JB |
202 | |
203 | /* Handler for non-grabbed (no keys depressed) mouse motion. */ | |
204 | Lisp_Object Vmouse_motion_handler; | |
205 | ||
ff11dfa1 JB |
206 | /* The frame in which the last input event occurred. |
207 | command_loop_1 will select this frame before running the | |
284f4730 JB |
208 | command bound to an event sequence, and read_key_sequence will |
209 | toss the existing prefix if the user starts typing at a | |
ff11dfa1 JB |
210 | new frame. */ |
211 | Lisp_Object Vlast_event_frame; | |
284f4730 | 212 | |
1113d9db JB |
213 | /* The timestamp of the last input event we received from the X server. |
214 | X Windows wants this for selection ownership. */ | |
284f4730 JB |
215 | unsigned long last_event_timestamp; |
216 | ||
217 | Lisp_Object Qself_insert_command; | |
218 | Lisp_Object Qforward_char; | |
219 | Lisp_Object Qbackward_char; | |
220 | ||
221 | /* read_key_sequence stores here the command definition of the | |
222 | key sequence that it reads. */ | |
223 | Lisp_Object read_key_sequence_cmd; | |
224 | ||
225 | /* Form to evaluate (if non-nil) when Emacs is started. */ | |
226 | Lisp_Object Vtop_level; | |
227 | ||
228 | /* User-supplied string to translate input characters through. */ | |
229 | Lisp_Object Vkeyboard_translate_table; | |
230 | ||
231 | /* Keymap mapping ASCII function key sequences onto their preferred forms. */ | |
232 | extern Lisp_Object Vfunction_key_map; | |
233 | ||
234 | /* File in which we write all commands we read. */ | |
235 | FILE *dribble; | |
236 | ||
237 | /* Nonzero if input is available. */ | |
238 | int input_pending; | |
239 | ||
240 | /* Nonzero if should obey 0200 bit in input chars as "Meta". */ | |
241 | int meta_key; | |
242 | ||
243 | extern char *pending_malloc_warning; | |
244 | ||
245 | /* Circular buffer for pre-read keyboard input. */ | |
246 | static struct input_event kbd_buffer[KBD_BUFFER_SIZE]; | |
247 | ||
248 | /* Pointer to next available character in kbd_buffer. | |
249 | If kbd_fetch_ptr == kbd_store_ptr, the buffer is empty. | |
250 | This may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the the | |
251 | next available char is in kbd_buffer[0]. */ | |
252 | static struct input_event *kbd_fetch_ptr; | |
253 | ||
254 | /* Pointer to next place to store character in kbd_buffer. This | |
255 | may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the next | |
256 | character should go in kbd_buffer[0]. */ | |
257 | static struct input_event *kbd_store_ptr; | |
258 | ||
259 | /* The above pair of variables forms a "queue empty" flag. When we | |
260 | enqueue a non-hook event, we increment kbd_write_count. When we | |
261 | dequeue a non-hook event, we increment kbd_read_count. We say that | |
262 | there is input available iff the two counters are equal. | |
263 | ||
264 | Why not just have a flag set and cleared by the enqueuing and | |
265 | dequeuing functions? Such a flag could be screwed up by interrupts | |
266 | at inopportune times. */ | |
267 | ||
268 | /* If this flag is non-zero, mouse movement events will appear in the | |
269 | input stream. If is zero, mouse movement will be ignored. */ | |
270 | int do_mouse_tracking; | |
271 | ||
272 | /* The window system handling code should set this if the mouse has | |
273 | moved since the last call to the mouse_position_hook. Calling that | |
274 | hook should clear this. Code assumes that if this is set, it can | |
275 | call mouse_position_hook to get the promised position, so don't set | |
276 | it unless you're prepared to substantiate the claim! */ | |
277 | int mouse_moved; | |
278 | ||
279 | /* True iff there is an event in kbd_buffer, or if mouse tracking is | |
280 | enabled and there is a new mouse position in the mouse movement | |
281 | buffer. Note that if this is false, that doesn't mean that there | |
282 | is readable input; all the events in the queue might be button-up | |
283 | events, and do_mouse_tracking might be off. */ | |
284 | #define EVENT_QUEUES_EMPTY \ | |
285 | ((kbd_fetch_ptr == kbd_store_ptr) && (!do_mouse_tracking || !mouse_moved)) | |
286 | ||
287 | ||
288 | /* Symbols to head events. */ | |
289 | Lisp_Object Qmouse_movement; | |
290 | ||
291 | Lisp_Object Qvscrollbar_part; | |
292 | Lisp_Object Qvslider_part; | |
293 | Lisp_Object Qvthumbup_part; | |
294 | Lisp_Object Qvthumbdown_part; | |
295 | ||
296 | Lisp_Object Qhscrollbar_part; | |
297 | Lisp_Object Qhslider_part; | |
298 | Lisp_Object Qhthumbleft_part; | |
299 | Lisp_Object Qhthumbright_part; | |
300 | ||
301 | /* Symbols to denote kinds of events. */ | |
302 | Lisp_Object Qfunction_key; | |
303 | Lisp_Object Qmouse_click; | |
304 | /* Lisp_Object Qmouse_movement; - also an event header */ | |
305 | Lisp_Object Qscrollbar_click; | |
306 | ||
307 | /* Properties of event headers. */ | |
308 | Lisp_Object Qevent_kind; | |
309 | Lisp_Object Qevent_unmodified; | |
310 | ||
311 | /* Symbols to use for non-text mouse positions. */ | |
312 | Lisp_Object Qmode_line; | |
e5d77022 | 313 | Lisp_Object Qvertical_line; |
284f4730 JB |
314 | |
315 | ||
ffd56f97 JB |
316 | /* Address (if not 0) of EMACS_TIME to zero out if a SIGIO interrupt |
317 | happens. */ | |
318 | EMACS_TIME *input_available_clear_time; | |
284f4730 JB |
319 | |
320 | /* Nonzero means use SIGIO interrupts; zero means use CBREAK mode. | |
321 | Default is 1 if INTERRUPT_INPUT is defined. */ | |
322 | int interrupt_input; | |
323 | ||
324 | /* Nonzero while interrupts are temporarily deferred during redisplay. */ | |
325 | int interrupts_deferred; | |
326 | ||
327 | /* nonzero means use ^S/^Q for flow control. */ | |
328 | int flow_control; | |
329 | ||
284f4730 JB |
330 | /* Allow m- file to inhibit use of FIONREAD. */ |
331 | #ifdef BROKEN_FIONREAD | |
332 | #undef FIONREAD | |
333 | #endif | |
334 | ||
335 | /* We are unable to use interrupts if FIONREAD is not available, | |
336 | so flush SIGIO so we won't try. */ | |
337 | #ifndef FIONREAD | |
338 | #ifdef SIGIO | |
339 | #undef SIGIO | |
340 | #endif | |
341 | #endif | |
342 | ||
343 | /* If we support X Windows, and won't get an interrupt when input | |
344 | arrives from the server, poll periodically so we can detect C-g. */ | |
345 | #ifdef HAVE_X_WINDOWS | |
346 | #ifndef SIGIO | |
347 | #define POLL_FOR_INPUT | |
348 | #endif | |
349 | #endif | |
350 | \f | |
351 | /* Global variable declarations. */ | |
352 | ||
353 | /* Function for init_keyboard to call with no args (if nonzero). */ | |
354 | void (*keyboard_init_hook) (); | |
355 | ||
356 | static int read_avail_input (); | |
357 | static void get_input_pending (); | |
358 | ||
359 | /* > 0 if we are to echo keystrokes. */ | |
360 | static int echo_keystrokes; | |
361 | ||
362 | /* Nonzero means echo each character as typed. */ | |
363 | static int immediate_echo; | |
364 | ||
365 | /* The text we're echoing in the modeline - partial key sequences, | |
366 | usually. '\0'-terminated. */ | |
367 | static char echobuf[100]; | |
368 | ||
369 | /* Where to append more text to echobuf if we want to. */ | |
370 | static char *echoptr; | |
371 | ||
372 | #define min(a,b) ((a)<(b)?(a):(b)) | |
373 | #define max(a,b) ((a)>(b)?(a):(b)) | |
374 | ||
375 | /* Install the string STR as the beginning of the string of echoing, | |
376 | so that it serves as a prompt for the next character. | |
377 | Also start echoing. */ | |
378 | ||
379 | echo_prompt (str) | |
380 | char *str; | |
381 | { | |
382 | int len = strlen (str); | |
383 | if (len > sizeof echobuf - 4) | |
384 | len = sizeof echobuf - 4; | |
385 | bcopy (str, echobuf, len + 1); | |
386 | echoptr = echobuf + len; | |
387 | ||
388 | echo (); | |
389 | } | |
390 | ||
391 | /* Add C to the echo string, if echoing is going on. | |
392 | C can be a character, which is printed prettily ("M-C-x" and all that | |
393 | jazz), or a symbol, whose name is printed. */ | |
394 | ||
395 | echo_char (c) | |
396 | Lisp_Object c; | |
397 | { | |
398 | extern char *push_key_description (); | |
399 | ||
400 | if (immediate_echo) | |
401 | { | |
402 | char *ptr = echoptr; | |
403 | ||
404 | if (ptr != echobuf) | |
405 | *ptr++ = ' '; | |
406 | ||
407 | /* If someone has passed us a composite event, use its head symbol. */ | |
408 | if (EVENT_HAS_PARAMETERS (c)) | |
409 | c = EVENT_HEAD (c); | |
410 | ||
411 | if (XTYPE (c) == Lisp_Int) | |
412 | { | |
413 | if (ptr - echobuf > sizeof echobuf - 6) | |
414 | return; | |
415 | ||
416 | ptr = push_key_description (c, ptr); | |
417 | } | |
418 | else if (XTYPE (c) == Lisp_Symbol) | |
419 | { | |
420 | struct Lisp_String *name = XSYMBOL (c)->name; | |
421 | if (((ptr - echobuf) + name->size + 4) > sizeof echobuf) | |
422 | return; | |
423 | bcopy (name->data, ptr, name->size); | |
424 | ptr += name->size; | |
425 | } | |
426 | ||
427 | if (echoptr == echobuf && c == help_char) | |
428 | { | |
429 | strcpy (ptr, " (Type ? for further options)"); | |
430 | ptr += strlen (ptr); | |
431 | } | |
432 | ||
433 | *ptr = 0; | |
434 | echoptr = ptr; | |
435 | ||
436 | echo (); | |
437 | } | |
438 | } | |
439 | ||
440 | /* Temporarily add a dash to the end of the echo string if it's not | |
441 | empty, so that it serves as a mini-prompt for the very next character. */ | |
442 | ||
443 | echo_dash () | |
444 | { | |
445 | if (!immediate_echo && echoptr == echobuf) | |
446 | return; | |
447 | ||
448 | /* Put a dash at the end of the buffer temporarily, | |
449 | but make it go away when the next character is added. */ | |
450 | echoptr[0] = '-'; | |
451 | echoptr[1] = 0; | |
452 | ||
453 | echo (); | |
454 | } | |
455 | ||
456 | /* Display the current echo string, and begin echoing if not already | |
457 | doing so. */ | |
458 | ||
459 | echo () | |
460 | { | |
461 | if (!immediate_echo) | |
462 | { | |
463 | int i; | |
464 | immediate_echo = 1; | |
465 | ||
466 | for (i = 0; i < this_command_key_count; i++) | |
467 | echo_char (this_command_keys[i]); | |
468 | echo_dash (); | |
469 | } | |
470 | ||
471 | echoing = 1; | |
472 | message1 (echobuf); | |
473 | echoing = 0; | |
474 | ||
475 | if (waiting_for_input && !NILP (Vquit_flag)) | |
476 | quit_throw_to_read_char (); | |
477 | } | |
478 | ||
479 | /* Turn off echoing, for the start of a new command. */ | |
480 | ||
481 | cancel_echoing () | |
482 | { | |
483 | immediate_echo = 0; | |
484 | echoptr = echobuf; | |
485 | } | |
486 | ||
487 | /* Return the length of the current echo string. */ | |
488 | ||
489 | static int | |
490 | echo_length () | |
491 | { | |
492 | return echoptr - echobuf; | |
493 | } | |
494 | ||
495 | /* Truncate the current echo message to its first LEN chars. | |
496 | This and echo_char get used by read_key_sequence when the user | |
ff11dfa1 | 497 | switches frames while entering a key sequence. */ |
284f4730 JB |
498 | |
499 | static void | |
500 | echo_truncate (len) | |
501 | int len; | |
502 | { | |
503 | echobuf[len] = '\0'; | |
504 | echoptr = echobuf + strlen (echobuf); | |
505 | } | |
506 | ||
507 | \f | |
508 | /* Functions for manipulating this_command_keys. */ | |
509 | static void | |
510 | add_command_key (key) | |
511 | Lisp_Object key; | |
512 | { | |
513 | if (this_command_key_count == this_command_keys_size) | |
514 | { | |
515 | this_command_keys_size *= 2; | |
516 | this_command_keys | |
517 | = (Lisp_Object *) xrealloc (this_command_keys, | |
518 | (this_command_keys_size | |
519 | * sizeof (Lisp_Object))); | |
520 | } | |
521 | this_command_keys[this_command_key_count++] = key; | |
522 | } | |
523 | \f | |
524 | Lisp_Object | |
525 | recursive_edit_1 () | |
526 | { | |
527 | int count = specpdl_ptr - specpdl; | |
528 | Lisp_Object val; | |
529 | ||
530 | if (command_loop_level > 0) | |
531 | { | |
532 | specbind (Qstandard_output, Qt); | |
533 | specbind (Qstandard_input, Qt); | |
534 | } | |
535 | ||
536 | val = command_loop (); | |
537 | if (EQ (val, Qt)) | |
538 | Fsignal (Qquit, Qnil); | |
539 | ||
540 | unbind_to (count); | |
541 | return Qnil; | |
542 | } | |
543 | ||
544 | /* When an auto-save happens, record the "time", and don't do again soon. */ | |
545 | record_auto_save () | |
546 | { | |
547 | last_auto_save = num_input_chars; | |
548 | } | |
549 | \f | |
550 | Lisp_Object recursive_edit_unwind (), command_loop (); | |
551 | ||
552 | DEFUN ("recursive-edit", Frecursive_edit, Srecursive_edit, 0, 0, "", | |
553 | "Invoke the editor command loop recursively.\n\ | |
554 | To get out of the recursive edit, a command can do `(throw 'exit nil)';\n\ | |
555 | that tells this function to return.\n\ | |
556 | Alternately, `(throw 'exit t)' makes this function signal an error.\n\ | |
557 | This function is called by the editor initialization to begin editing.") | |
558 | () | |
559 | { | |
560 | int count = specpdl_ptr - specpdl; | |
561 | Lisp_Object val; | |
562 | ||
563 | command_loop_level++; | |
564 | update_mode_lines = 1; | |
565 | ||
566 | record_unwind_protect (recursive_edit_unwind, | |
567 | (command_loop_level | |
568 | && current_buffer != XBUFFER (XWINDOW (selected_window)->buffer)) | |
569 | ? Fcurrent_buffer () | |
570 | : Qnil); | |
571 | recursive_edit_1 (); | |
572 | return unbind_to (count, Qnil); | |
573 | } | |
574 | ||
575 | Lisp_Object | |
576 | recursive_edit_unwind (buffer) | |
577 | Lisp_Object buffer; | |
578 | { | |
579 | if (!NILP (buffer)) | |
580 | Fset_buffer (buffer); | |
581 | ||
582 | command_loop_level--; | |
583 | update_mode_lines = 1; | |
584 | return Qnil; | |
585 | } | |
586 | \f | |
587 | Lisp_Object | |
588 | cmd_error (data) | |
589 | Lisp_Object data; | |
590 | { | |
591 | Lisp_Object errmsg, tail, errname, file_error; | |
592 | Lisp_Object stream; | |
593 | struct gcpro gcpro1; | |
594 | int i; | |
595 | ||
596 | Vquit_flag = Qnil; | |
597 | Vinhibit_quit = Qt; | |
598 | Vstandard_output = Qt; | |
599 | Vstandard_input = Qt; | |
600 | Vexecuting_macro = Qnil; | |
601 | echo_area_glyphs = 0; | |
602 | ||
ff11dfa1 | 603 | /* If the window system or terminal frame hasn't been initialized |
284f4730 JB |
604 | yet, or we're not interactive, it's best to dump this message out |
605 | to stderr and exit. */ | |
ff11dfa1 | 606 | if (! FRAME_MESSAGE_BUF (selected_frame) |
284f4730 JB |
607 | || noninteractive) |
608 | stream = Qexternal_debugging_output; | |
609 | else | |
610 | { | |
611 | Fdiscard_input (); | |
612 | bitch_at_user (); | |
613 | stream = Qt; | |
614 | } | |
615 | ||
616 | errname = Fcar (data); | |
617 | ||
618 | if (EQ (errname, Qerror)) | |
619 | { | |
620 | data = Fcdr (data); | |
621 | if (!CONSP (data)) data = Qnil; | |
622 | errmsg = Fcar (data); | |
623 | file_error = Qnil; | |
624 | } | |
625 | else | |
626 | { | |
627 | errmsg = Fget (errname, Qerror_message); | |
628 | file_error = Fmemq (Qfile_error, | |
629 | Fget (errname, Qerror_conditions)); | |
630 | } | |
631 | ||
632 | /* Print an error message including the data items. | |
633 | This is done by printing it into a scratch buffer | |
634 | and then making a copy of the text in the buffer. */ | |
635 | ||
636 | if (!CONSP (data)) data = Qnil; | |
637 | tail = Fcdr (data); | |
638 | GCPRO1 (tail); | |
639 | ||
640 | /* For file-error, make error message by concatenating | |
641 | all the data items. They are all strings. */ | |
642 | if (!NILP (file_error) && !NILP (tail)) | |
643 | errmsg = XCONS (tail)->car, tail = XCONS (tail)->cdr; | |
644 | ||
645 | if (XTYPE (errmsg) == Lisp_String) | |
646 | Fprinc (errmsg, stream); | |
647 | else | |
648 | write_string_1 ("peculiar error", -1, stream); | |
649 | ||
650 | for (i = 0; CONSP (tail); tail = Fcdr (tail), i++) | |
651 | { | |
652 | write_string_1 (i ? ", " : ": ", 2, stream); | |
653 | if (!NILP (file_error)) | |
654 | Fprinc (Fcar (tail), stream); | |
655 | else | |
656 | Fprin1 (Fcar (tail), stream); | |
657 | } | |
658 | UNGCPRO; | |
659 | ||
ff11dfa1 | 660 | /* If the window system or terminal frame hasn't been initialized |
284f4730 | 661 | yet, or we're in -batch mode, this error should cause Emacs to exit. */ |
ff11dfa1 | 662 | if (! FRAME_MESSAGE_BUF (selected_frame) |
284f4730 JB |
663 | || noninteractive) |
664 | { | |
665 | Fterpri (stream); | |
666 | Fkill_emacs (make_number (-1)); | |
667 | } | |
668 | ||
669 | Vquit_flag = Qnil; | |
670 | ||
671 | Vinhibit_quit = Qnil; | |
672 | return make_number (0); | |
673 | } | |
674 | \f | |
675 | Lisp_Object command_loop_1 (); | |
676 | Lisp_Object command_loop_2 (); | |
677 | Lisp_Object top_level_1 (); | |
678 | ||
679 | /* Entry to editor-command-loop. | |
680 | This level has the catches for exiting/returning to editor command loop. | |
681 | It returns nil to exit recursive edit, t to abort it. */ | |
682 | ||
683 | Lisp_Object | |
684 | command_loop () | |
685 | { | |
686 | if (command_loop_level > 0 || minibuf_level > 0) | |
687 | { | |
688 | return internal_catch (Qexit, command_loop_2, Qnil); | |
689 | } | |
690 | else | |
691 | while (1) | |
692 | { | |
693 | internal_catch (Qtop_level, top_level_1, Qnil); | |
694 | internal_catch (Qtop_level, command_loop_2, Qnil); | |
695 | ||
696 | /* End of file in -batch run causes exit here. */ | |
697 | if (noninteractive) | |
698 | Fkill_emacs (Qt); | |
699 | } | |
700 | } | |
701 | ||
702 | /* Here we catch errors in execution of commands within the | |
703 | editing loop, and reenter the editing loop. | |
704 | When there is an error, cmd_error runs and returns a non-nil | |
705 | value to us. A value of nil means that cmd_loop_1 itself | |
706 | returned due to end of file (or end of kbd macro). */ | |
707 | ||
708 | Lisp_Object | |
709 | command_loop_2 () | |
710 | { | |
711 | register Lisp_Object val; | |
712 | ||
713 | do | |
714 | val = internal_condition_case (command_loop_1, Qerror, cmd_error); | |
715 | while (!NILP (val)); | |
716 | ||
717 | return Qnil; | |
718 | } | |
719 | ||
720 | Lisp_Object | |
721 | top_level_2 () | |
722 | { | |
723 | return Feval (Vtop_level); | |
724 | } | |
725 | ||
726 | Lisp_Object | |
727 | top_level_1 () | |
728 | { | |
729 | /* On entry to the outer level, run the startup file */ | |
730 | if (!NILP (Vtop_level)) | |
731 | internal_condition_case (top_level_2, Qerror, cmd_error); | |
732 | else if (!NILP (Vpurify_flag)) | |
733 | message ("Bare impure Emacs (standard Lisp code not loaded)"); | |
734 | else | |
735 | message ("Bare Emacs (standard Lisp code not loaded)"); | |
736 | return Qnil; | |
737 | } | |
738 | ||
739 | DEFUN ("top-level", Ftop_level, Stop_level, 0, 0, "", | |
740 | "Exit all recursive editing levels.") | |
741 | () | |
742 | { | |
743 | Fthrow (Qtop_level, Qnil); | |
744 | } | |
745 | ||
746 | DEFUN ("exit-recursive-edit", Fexit_recursive_edit, Sexit_recursive_edit, 0, 0, "", | |
747 | "Exit from the innermost recursive edit or minibuffer.") | |
748 | () | |
749 | { | |
750 | if (command_loop_level > 0 || minibuf_level > 0) | |
751 | Fthrow (Qexit, Qnil); | |
752 | ||
753 | error ("No recursive edit is in progress"); | |
754 | } | |
755 | ||
756 | DEFUN ("abort-recursive-edit", Fabort_recursive_edit, Sabort_recursive_edit, 0, 0, "", | |
757 | "Abort the command that requested this recursive edit or minibuffer input.") | |
758 | () | |
759 | { | |
760 | if (command_loop_level > 0 || minibuf_level > 0) | |
761 | Fthrow (Qexit, Qt); | |
762 | ||
763 | error ("No recursive edit is in progress"); | |
764 | } | |
765 | \f | |
766 | /* This is the actual command reading loop, | |
767 | sans error-handling encapsulation. */ | |
768 | ||
769 | Lisp_Object Fcommand_execute (); | |
770 | static int read_key_sequence (); | |
771 | ||
772 | Lisp_Object | |
773 | command_loop_1 () | |
774 | { | |
775 | Lisp_Object cmd; | |
776 | int lose; | |
777 | int nonundocount; | |
778 | Lisp_Object keybuf[30]; | |
779 | int i; | |
780 | int no_redisplay; | |
781 | int no_direct; | |
782 | ||
783 | Vprefix_arg = Qnil; | |
784 | waiting_for_input = 0; | |
785 | cancel_echoing (); | |
786 | ||
787 | /* Don't clear out last_command at the beginning of a macro. */ | |
788 | if (XTYPE (Vexecuting_macro) != Lisp_String) | |
789 | last_command = Qt; | |
790 | ||
791 | nonundocount = 0; | |
792 | no_redisplay = 0; | |
793 | this_command_key_count = 0; | |
794 | ||
795 | while (1) | |
796 | { | |
797 | /* Install chars successfully executed in kbd macro. */ | |
798 | ||
799 | if (defining_kbd_macro && NILP (Vprefix_arg)) | |
800 | finalize_kbd_macro_chars (); | |
801 | ||
802 | /* Make sure the current window's buffer is selected. */ | |
803 | if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) | |
804 | set_buffer_internal (XBUFFER (XWINDOW (selected_window)->buffer)); | |
805 | ||
806 | /* Display any malloc warning that just came out. Use while because | |
807 | displaying one warning can cause another. */ | |
808 | ||
809 | while (pending_malloc_warning) | |
810 | display_malloc_warning (); | |
811 | ||
812 | no_direct = 0; | |
813 | ||
814 | /* If minibuffer on and echo area in use, | |
815 | wait 2 sec and redraw minibufer. */ | |
816 | ||
817 | if (minibuf_level && echo_area_glyphs) | |
818 | { | |
819 | Fsit_for (make_number (2), Qnil, Qnil); | |
820 | echo_area_glyphs = 0; | |
821 | no_direct = 1; | |
822 | if (!NILP (Vquit_flag)) | |
823 | { | |
824 | Vquit_flag = Qnil; | |
825 | unread_command_char = make_number (quit_char); | |
826 | } | |
827 | } | |
828 | ||
829 | #ifdef C_ALLOCA | |
830 | alloca (0); /* Cause a garbage collection now */ | |
831 | /* Since we can free the most stuff here. */ | |
832 | #endif /* C_ALLOCA */ | |
833 | ||
834 | /* Read next key sequence; i gets its length. */ | |
835 | i = read_key_sequence (keybuf, (sizeof keybuf / sizeof (keybuf[0])), 0); | |
836 | ||
837 | ++num_input_keys; | |
838 | ||
ff11dfa1 JB |
839 | #ifdef MULTI_FRAME |
840 | /* Select the frame that the key sequence came from. */ | |
841 | if (XTYPE (Vlast_event_frame) == Lisp_Frame | |
842 | && XFRAME (Vlast_event_frame) != selected_frame) | |
843 | Fselect_frame (Vlast_event_frame, Qnil); | |
284f4730 JB |
844 | #endif |
845 | ||
846 | /* Now we have read a key sequence of length I, | |
847 | or else I is 0 and we found end of file. */ | |
848 | ||
849 | if (i == 0) /* End of file -- happens only in */ | |
850 | return Qnil; /* a kbd macro, at the end. */ | |
851 | ||
852 | #if 0 | |
853 | #ifdef HAVE_X_WINDOWS | |
ff11dfa1 | 854 | if (FRAME_IS_X (selected_frame)) |
284f4730 JB |
855 | { |
856 | if (i == -1) /* Mouse event */ | |
857 | { | |
858 | nonundocount = 0; | |
859 | if (NILP (Vprefix_arg) && NILP (Vexecuting_macro) && | |
860 | !EQ (minibuf_window, selected_window)) | |
861 | Fundo_boundary (); | |
862 | ||
863 | if (defining_kbd_macro) | |
864 | { | |
865 | /* Be nice if this worked... */ | |
866 | } | |
867 | Fexecute_mouse_event (read_key_sequence_cmd); | |
868 | no_redisplay = 0; | |
869 | goto directly_done; | |
870 | } | |
871 | ||
872 | if (i == -2) /* Lisp Symbol */ | |
873 | { | |
874 | nonundocount = 0; | |
875 | if (NILP (Vprefix_arg) && NILP (Vexecuting_macro) && | |
876 | !EQ (minibuf_window, selected_window)) | |
877 | Fundo_boundary (); | |
878 | ||
879 | goto directly_done; | |
880 | } | |
881 | } | |
882 | #endif /* HAVE_X_WINDOWS */ | |
883 | #endif | |
884 | ||
885 | last_command_char = keybuf[i - 1]; | |
886 | ||
887 | cmd = read_key_sequence_cmd; | |
888 | if (!NILP (Vexecuting_macro)) | |
889 | { | |
890 | if (!NILP (Vquit_flag)) | |
891 | { | |
892 | Vexecuting_macro = Qt; | |
893 | QUIT; /* Make some noise. */ | |
894 | /* Will return since macro now empty. */ | |
895 | } | |
896 | } | |
897 | ||
898 | /* Do redisplay processing after this command except in special | |
899 | cases identified below that set no_redisplay to 1. */ | |
900 | no_redisplay = 0; | |
901 | ||
902 | /* Execute the command. */ | |
903 | ||
904 | if (NILP (cmd)) | |
905 | { | |
906 | /* nil means key is undefined. */ | |
907 | bitch_at_user (); | |
908 | defining_kbd_macro = 0; | |
909 | update_mode_lines = 1; | |
910 | Vprefix_arg = Qnil; | |
911 | } | |
912 | else | |
913 | { | |
914 | this_command = cmd; | |
915 | if (NILP (Vprefix_arg) && ! no_direct) | |
916 | { | |
917 | /* Recognize some common commands in common situations and | |
918 | do them directly. */ | |
919 | if (EQ (cmd, Qforward_char) && point < ZV) | |
920 | { | |
921 | struct Lisp_Vector *dp | |
922 | = window_display_table (XWINDOW (selected_window)); | |
923 | lose = FETCH_CHAR (point); | |
924 | SET_PT (point + 1); | |
925 | if (((dp == 0 && lose >= 040 && lose < 0177) | |
926 | || | |
927 | (dp && (XTYPE (dp->contents[lose]) != Lisp_String | |
928 | || XSTRING (dp->contents[lose])->size == sizeof (GLYPH)))) | |
284f4730 JB |
929 | && (XFASTINT (XWINDOW (selected_window)->last_modified) |
930 | >= MODIFF) | |
931 | && (XFASTINT (XWINDOW (selected_window)->last_point) | |
932 | == point - 1) | |
933 | && !windows_or_buffers_changed | |
934 | && EQ (current_buffer->selective_display, Qnil) | |
935 | && !detect_input_pending () | |
936 | && NILP (Vexecuting_macro)) | |
937 | no_redisplay = direct_output_forward_char (1); | |
938 | goto directly_done; | |
939 | } | |
940 | else if (EQ (cmd, Qbackward_char) && point > BEGV) | |
941 | { | |
942 | struct Lisp_Vector *dp | |
943 | = window_display_table (XWINDOW (selected_window)); | |
944 | SET_PT (point - 1); | |
945 | lose = FETCH_CHAR (point); | |
946 | if (((dp == 0 && lose >= 040 && lose < 0177) | |
947 | || | |
948 | (dp && (XTYPE (dp->contents[lose]) != Lisp_String | |
949 | || XSTRING (dp->contents[lose])->size == sizeof (GLYPH)))) | |
284f4730 JB |
950 | && (XFASTINT (XWINDOW (selected_window)->last_modified) |
951 | >= MODIFF) | |
952 | && (XFASTINT (XWINDOW (selected_window)->last_point) | |
953 | == point + 1) | |
954 | && !windows_or_buffers_changed | |
955 | && EQ (current_buffer->selective_display, Qnil) | |
956 | && !detect_input_pending () | |
957 | && NILP (Vexecuting_macro)) | |
958 | no_redisplay = direct_output_forward_char (-1); | |
959 | goto directly_done; | |
960 | } | |
961 | else if (EQ (cmd, Qself_insert_command) | |
962 | /* Try this optimization only on ascii keystrokes. */ | |
963 | && XTYPE (last_command_char) == Lisp_Int) | |
964 | { | |
965 | unsigned char c = XINT (last_command_char); | |
966 | ||
967 | if (NILP (Vexecuting_macro) && | |
968 | !EQ (minibuf_window, selected_window)) | |
969 | { | |
970 | if (!nonundocount || nonundocount >= 20) | |
971 | { | |
972 | Fundo_boundary (); | |
973 | nonundocount = 0; | |
974 | } | |
975 | nonundocount++; | |
976 | } | |
977 | lose = (XFASTINT (XWINDOW (selected_window)->last_modified) | |
978 | < MODIFF) | |
979 | || (XFASTINT (XWINDOW (selected_window)->last_point) | |
980 | != point) | |
981 | || MODIFF <= current_buffer->save_modified | |
982 | || windows_or_buffers_changed | |
983 | || !EQ (current_buffer->selective_display, Qnil) | |
984 | || detect_input_pending () | |
985 | || !NILP (Vexecuting_macro); | |
986 | if (internal_self_insert (c, 0)) | |
987 | { | |
988 | lose = 1; | |
989 | nonundocount = 0; | |
990 | } | |
991 | if (!lose && | |
992 | (point == ZV || FETCH_CHAR (point) == '\n')) | |
993 | { | |
994 | struct Lisp_Vector *dp | |
995 | = window_display_table (XWINDOW (selected_window)); | |
996 | ||
997 | if (dp == 0 || XTYPE (dp->contents[c]) != Lisp_String) | |
998 | no_redisplay = direct_output_for_insert (c); | |
999 | else if (XSTRING (dp->contents[c])->size | |
1000 | == sizeof (GLYPH)) | |
1001 | no_redisplay = | |
1002 | direct_output_for_insert (*(GLYPH *)XSTRING (dp->contents[c])->data); | |
1003 | } | |
1004 | goto directly_done; | |
1005 | } | |
1006 | } | |
1007 | ||
1008 | /* Here for a command that isn't executed directly */ | |
1009 | ||
1010 | nonundocount = 0; | |
1011 | if (NILP (Vprefix_arg)) | |
1012 | Fundo_boundary (); | |
1013 | Fcommand_execute (cmd, Qnil); | |
1014 | ||
284f4730 | 1015 | } |
a764a753 | 1016 | directly_done: ; |
284f4730 JB |
1017 | |
1018 | /* If there is a prefix argument, | |
1019 | 1) We don't want last_command to be ``universal-argument'' | |
1020 | (that would be dumb), so don't set last_command, | |
1021 | 2) we want to leave echoing on so that the prefix will be | |
1022 | echoed as part of this key sequence, so don't call | |
1023 | cancel_echoing, and | |
1024 | 3) we want to leave this_command_key_count non-zero, so that | |
1025 | read_char will realize that it is re-reading a character, and | |
1026 | not echo it a second time. */ | |
1027 | if (NILP (Vprefix_arg)) | |
1028 | { | |
1029 | last_command = this_command; | |
1030 | cancel_echoing (); | |
1031 | this_command_key_count = 0; | |
1032 | } | |
1033 | } | |
1034 | } | |
1035 | \f | |
1036 | /* Number of seconds between polling for input. */ | |
1037 | int polling_period; | |
1038 | ||
1039 | /* Nonzero means polling for input is temporarily suppresed. */ | |
1040 | int poll_suppress_count; | |
1041 | ||
1042 | #ifdef POLL_FOR_INPUT | |
1043 | int polling_for_input; | |
1044 | ||
1045 | /* Handle an alarm once each second and read pending input | |
1046 | so as to handle a C-g if it comces in. */ | |
1047 | ||
1048 | SIGTYPE | |
1049 | input_poll_signal () | |
1050 | { | |
1051 | #ifdef HAVE_X_WINDOWS | |
1052 | extern int x_input_blocked; | |
1053 | if (x_input_blocked == 0) | |
1054 | #endif | |
1055 | if (!waiting_for_input) | |
1056 | read_avail_input (0); | |
1057 | signal (SIGALRM, input_poll_signal); | |
1058 | alarm (polling_period); | |
1059 | } | |
1060 | ||
1061 | #endif | |
1062 | ||
1063 | /* Begin signals to poll for input, if they are appropriate. | |
1064 | This function is called unconditionally from various places. */ | |
1065 | ||
1066 | start_polling () | |
1067 | { | |
1068 | #ifdef POLL_FOR_INPUT | |
1069 | if (read_socket_hook) | |
1070 | { | |
1071 | poll_suppress_count--; | |
1072 | if (poll_suppress_count == 0) | |
1073 | { | |
1074 | signal (SIGALRM, input_poll_signal); | |
1075 | polling_for_input = 1; | |
1076 | alarm (polling_period); | |
1077 | } | |
1078 | } | |
1079 | #endif | |
1080 | } | |
1081 | ||
1082 | /* Turn off polling. */ | |
1083 | ||
1084 | stop_polling () | |
1085 | { | |
1086 | #ifdef POLL_FOR_INPUT | |
1087 | if (read_socket_hook) | |
1088 | { | |
1089 | if (poll_suppress_count == 0) | |
1090 | { | |
1091 | polling_for_input = 0; | |
1092 | alarm (0); | |
1093 | } | |
1094 | poll_suppress_count++; | |
1095 | } | |
1096 | #endif | |
1097 | } | |
1098 | \f | |
1099 | /* Input of single characters from keyboard */ | |
1100 | ||
1101 | Lisp_Object print_help (); | |
1102 | static Lisp_Object kbd_buffer_get_event (); | |
1103 | ||
1104 | /* read a character from the keyboard; call the redisplay if needed */ | |
1105 | /* commandflag 0 means do not do auto-saving, but do do redisplay. | |
1106 | -1 means do not do redisplay, but do do autosaving. | |
1107 | 1 means do both. */ | |
1108 | ||
1109 | Lisp_Object | |
1110 | read_char (commandflag) | |
1111 | int commandflag; | |
1112 | { | |
1113 | register Lisp_Object c; | |
1114 | int count; | |
1115 | jmp_buf save_jump; | |
1116 | ||
1117 | if (!NILP (unread_command_char)) | |
1118 | { | |
1119 | c = unread_command_char; | |
1120 | unread_command_char = Qnil; | |
1121 | ||
1122 | #if 0 /* We're not handling mouse keys specially anymore. */ | |
1123 | if (!EQ (XTYPE (obj), Lisp_Int)) /* Mouse thing */ | |
1124 | { | |
1125 | num_input_chars++; | |
1126 | last_input_char = 0; | |
1127 | return obj; | |
1128 | } | |
1129 | #endif | |
1130 | ||
1131 | if (this_command_key_count == 0) | |
1132 | goto reread_first; | |
1133 | else | |
1134 | goto reread; | |
1135 | } | |
1136 | ||
1137 | if (!NILP (Vexecuting_macro)) | |
1138 | { | |
1139 | if (executing_macro_index >= Flength (Vexecuting_macro)) | |
1140 | { | |
1141 | XSET (c, Lisp_Int, -1); | |
1142 | return c; | |
1143 | } | |
1144 | ||
1145 | c = Faref (Vexecuting_macro, make_number (executing_macro_index)); | |
1146 | executing_macro_index++; | |
1147 | ||
1148 | goto from_macro; | |
1149 | } | |
1150 | ||
1151 | /* Save outer setjmp data, in case called recursively. */ | |
f76475ad | 1152 | save_getcjmp (save_jump); |
284f4730 JB |
1153 | |
1154 | stop_polling (); | |
1155 | ||
1156 | if (commandflag >= 0 && !input_pending && !detect_input_pending ()) | |
1157 | redisplay (); | |
1158 | ||
1159 | if (_setjmp (getcjmp)) | |
1160 | { | |
1161 | XSET (c, Lisp_Int, quit_char); | |
ff11dfa1 JB |
1162 | #ifdef MULTI_FRAME |
1163 | XSET (Vlast_event_frame, Lisp_Frame, selected_frame); | |
519a3b65 | 1164 | #endif |
284f4730 | 1165 | |
284f4730 JB |
1166 | goto non_reread; |
1167 | } | |
1168 | ||
1169 | /* Message turns off echoing unless more keystrokes turn it on again. */ | |
1170 | if (echo_area_glyphs && *echo_area_glyphs && echo_area_glyphs != echobuf) | |
1171 | cancel_echoing (); | |
1172 | else | |
1173 | /* If already echoing, continue. */ | |
1174 | echo_dash (); | |
1175 | ||
1176 | /* If in middle of key sequence and minibuffer not active, | |
1177 | start echoing if enough time elapses. */ | |
1178 | if (minibuf_level == 0 && !immediate_echo && this_command_key_count > 0 | |
1179 | && echo_keystrokes > 0 | |
1180 | && (echo_area_glyphs == 0 || *echo_area_glyphs == 0)) | |
1181 | { | |
1182 | Lisp_Object tem0; | |
1183 | ||
f76475ad | 1184 | tem0 = sit_for (echo_keystrokes, 0, 1, 1); |
284f4730 JB |
1185 | if (EQ (tem0, Qt)) |
1186 | echo (); | |
1187 | } | |
1188 | ||
1189 | /* Maybe auto save due to number of keystrokes or idle time. */ | |
1190 | ||
1191 | if (commandflag != 0 | |
1192 | && auto_save_interval > 0 | |
1193 | && num_input_chars - last_auto_save > max (auto_save_interval, 20) | |
1194 | && !detect_input_pending ()) | |
1195 | { | |
1196 | jmp_buf temp; | |
1197 | save_getcjmp (temp); | |
1198 | Fdo_auto_save (Qnil, Qnil); | |
1199 | restore_getcjmp (temp); | |
1200 | } | |
1201 | ||
1202 | /* Slow down auto saves logarithmically in size of current buffer, | |
1203 | and garbage collect while we're at it. */ | |
1204 | { | |
1205 | int delay_level, buffer_size; | |
1206 | ||
1207 | if (! MINI_WINDOW_P (XWINDOW (selected_window))) | |
1208 | last_non_minibuf_size = Z - BEG; | |
1209 | buffer_size = (last_non_minibuf_size >> 8) + 1; | |
1210 | delay_level = 0; | |
1211 | while (buffer_size > 64) | |
1212 | delay_level++, buffer_size -= buffer_size >> 2; | |
1213 | if (delay_level < 4) delay_level = 4; | |
1214 | /* delay_level is 4 for files under around 50k, 7 at 100k, | |
1215 | 9 at 200k, 11 at 300k, and 12 at 500k. It is 15 at 1 meg. */ | |
1216 | ||
1217 | /* Auto save if enough time goes by without input. */ | |
1218 | if (commandflag != 0 | |
1219 | && num_input_chars > last_auto_save | |
1220 | && XTYPE (Vauto_save_timeout) == Lisp_Int | |
1221 | && XINT (Vauto_save_timeout) > 0) | |
1222 | { | |
1223 | Lisp_Object tem0; | |
1224 | int delay = delay_level * XFASTINT (Vauto_save_timeout) / 4; | |
f76475ad | 1225 | tem0 = sit_for (delay, 0, 1, 1); |
284f4730 JB |
1226 | if (EQ (tem0, Qt)) |
1227 | { | |
1228 | jmp_buf temp; | |
1229 | save_getcjmp (temp); | |
1230 | Fdo_auto_save (Qnil, Qnil); | |
1231 | restore_getcjmp (temp); | |
1232 | ||
1233 | /* If we have auto-saved and there is still no input | |
1234 | available, garbage collect if there has been enough | |
1235 | consing going on to make it worthwhile. */ | |
1236 | if (!detect_input_pending () | |
1237 | && consing_since_gc > gc_cons_threshold / 2) | |
1238 | Fgarbage_collect (); | |
1239 | } | |
1240 | } | |
1241 | } | |
1242 | ||
1243 | /* Actually read a character, waiting if necessary. */ | |
1244 | c = kbd_buffer_get_event (); | |
1245 | ||
1246 | if (NILP (c)) | |
1247 | abort (); /* Don't think this can happen. */ | |
1248 | ||
1249 | #if 0 /* I think that all the different kinds of events should be | |
1250 | handled together now... */ | |
1251 | if (XTYPE (c) != Lisp_Int) | |
1252 | { | |
1253 | start_polling (); | |
1254 | return c; | |
1255 | } | |
1256 | c = XINT (obj); | |
1257 | #endif | |
1258 | ||
1259 | /* Terminate Emacs in batch mode if at eof. */ | |
1260 | if (noninteractive && c < 0) | |
1261 | Fkill_emacs (make_number (1)); | |
1262 | ||
1263 | non_reread: | |
1264 | ||
f76475ad | 1265 | restore_getcjmp (save_jump); |
284f4730 JB |
1266 | |
1267 | start_polling (); | |
1268 | ||
1269 | echo_area_glyphs = 0; | |
1270 | ||
1271 | /* Handle things that only apply to characters. */ | |
1272 | if (XTYPE (c) == Lisp_Int) | |
1273 | { | |
1274 | /* If kbd_buffer_get_event gave us an EOF, return that. */ | |
1275 | if (XINT (c) < 0) | |
1276 | return c; | |
1277 | ||
1278 | /* Strip the high bits, and maybe the meta bit too. */ | |
1279 | XSETINT (c, c & (meta_key ? 0377 : 0177)); | |
1280 | ||
1281 | if (XTYPE (Vkeyboard_translate_table) == Lisp_String | |
1282 | && XSTRING (Vkeyboard_translate_table)->size > XINT (c)) | |
1283 | XSETINT (c, XSTRING (Vkeyboard_translate_table)->data[c]); | |
1284 | } | |
1285 | ||
1286 | total_keys++; | |
1287 | recent_keys[recent_keys_index] = c; | |
1288 | if (++recent_keys_index >= (sizeof (recent_keys)/sizeof(recent_keys[0]))) | |
1289 | recent_keys_index = 0; | |
1290 | ||
1291 | /* Write c to the dribble file. If c is a lispy event, write | |
1292 | the event's symbol to the dribble file, in <brackets>. Bleaugh. | |
1293 | If you, dear reader, have a better idea, you've got the source. :-) */ | |
1294 | if (dribble) | |
1295 | { | |
1296 | if (XTYPE (c) == Lisp_Int) | |
1297 | putc (c, dribble); | |
1298 | else | |
1299 | { | |
1300 | Lisp_Object dribblee = c; | |
1301 | ||
1302 | /* If it's a structured event, take the event header. */ | |
1303 | if (EVENT_HAS_PARAMETERS (dribblee)) | |
1304 | dribblee = EVENT_HEAD (dribblee); | |
1305 | ||
1306 | if (XTYPE (c) == Lisp_Symbol) | |
1307 | { | |
1308 | putc ('<', dribble); | |
1309 | fwrite (XSYMBOL (c)->name->data, sizeof (char), | |
1310 | XSYMBOL (c)->name->size, | |
1311 | dribble); | |
1312 | putc ('>', dribble); | |
1313 | } | |
1314 | } | |
1315 | ||
1316 | fflush (dribble); | |
1317 | } | |
1318 | ||
1319 | store_kbd_macro_char (c); | |
1320 | ||
1321 | from_macro: | |
1322 | reread_first: | |
1323 | echo_char (c); | |
1324 | ||
1325 | /* Record this character as part of the current key. */ | |
1326 | add_command_key (c); | |
1327 | ||
1328 | /* Re-reading in the middle of a command */ | |
1329 | reread: | |
1330 | last_input_char = c; | |
1331 | num_input_chars++; | |
1332 | ||
1333 | /* Process the help character specially if enabled */ | |
1334 | if (EQ (c, help_char) && !NILP (Vhelp_form)) | |
1335 | { | |
1336 | Lisp_Object tem0; | |
1337 | count = specpdl_ptr - specpdl; | |
1338 | ||
1339 | record_unwind_protect (Fset_window_configuration, | |
1340 | Fcurrent_window_configuration (Qnil)); | |
1341 | ||
1342 | tem0 = Feval (Vhelp_form); | |
1343 | if (XTYPE (tem0) == Lisp_String) | |
1344 | internal_with_output_to_temp_buffer ("*Help*", print_help, tem0); | |
1345 | ||
1346 | cancel_echoing (); | |
1347 | c = read_char (0); | |
ff11dfa1 | 1348 | /* Remove the help from the frame */ |
284f4730 JB |
1349 | unbind_to (count, Qnil); |
1350 | redisplay (); | |
1351 | if (EQ (c, make_number (040))) | |
1352 | { | |
1353 | cancel_echoing (); | |
1354 | c = read_char (0); | |
1355 | } | |
1356 | } | |
1357 | ||
1358 | return c; | |
1359 | } | |
1360 | ||
1361 | Lisp_Object | |
1362 | print_help (object) | |
1363 | Lisp_Object object; | |
1364 | { | |
1365 | Fprinc (object, Qnil); | |
1366 | return Qnil; | |
1367 | } | |
1368 | ||
1369 | /* Copy out or in the info on where C-g should throw to. | |
1370 | This is used when running Lisp code from within get_char, | |
1371 | in case get_char is called recursively. | |
1372 | See read_process_output. */ | |
1373 | ||
1374 | save_getcjmp (temp) | |
1375 | jmp_buf temp; | |
1376 | { | |
1377 | bcopy (getcjmp, temp, sizeof getcjmp); | |
1378 | } | |
1379 | ||
1380 | restore_getcjmp (temp) | |
1381 | jmp_buf temp; | |
1382 | { | |
1383 | bcopy (temp, getcjmp, sizeof getcjmp); | |
1384 | } | |
1385 | ||
1386 | \f | |
1387 | /* Low level keyboard/mouse input. | |
1388 | kbd_buffer_store_event places events in kbd_buffer, and | |
1389 | kbd_buffer_get_event retrieves them. | |
1390 | mouse_moved indicates when the mouse has moved again, and | |
1391 | *mouse_position_hook provides the mouse position. */ | |
1392 | ||
1393 | /* Set this for debugging, to have a way to get out */ | |
1394 | int stop_character; | |
1395 | ||
ff11dfa1 | 1396 | extern int frame_garbaged; |
284f4730 JB |
1397 | |
1398 | /* Return true iff there are any events in the queue that read-char | |
1399 | would return. If this returns false, a read-char would block. */ | |
1400 | static int | |
1401 | readable_events () | |
1402 | { | |
1403 | struct input_event *ep; | |
1404 | ||
1405 | if (EVENT_QUEUES_EMPTY) | |
1406 | return 0; | |
1407 | ||
1408 | if (do_mouse_tracking) | |
1409 | return 1; | |
1410 | ||
1411 | /* Mouse tracking is disabled, so we need to actually scan the | |
1412 | input queue to see if any events are currently readable. */ | |
1413 | for (ep = kbd_fetch_ptr; ep != kbd_store_ptr; ep++) | |
1414 | { | |
1415 | if (ep == kbd_buffer + KBD_BUFFER_SIZE) | |
1416 | ep = kbd_buffer; | |
1417 | ||
1418 | /* Skip button-up events. */ | |
1419 | if ((ep->kind == mouse_click || ep->kind == scrollbar_click) | |
1420 | && (ep->modifiers & up_modifier)) | |
1421 | continue; | |
1422 | ||
1423 | return 1; | |
1424 | } | |
1425 | ||
1426 | return 0; | |
1427 | } | |
1428 | ||
1429 | ||
1430 | /* Restore mouse tracking enablement. See Ftrack_mouse for the only use | |
1431 | of this function. */ | |
1432 | static Lisp_Object | |
1433 | tracking_off (old_value) | |
1434 | Lisp_Object old_value; | |
1435 | { | |
1436 | if (! XFASTINT (old_value)) | |
1437 | { | |
1438 | do_mouse_tracking = 0; | |
1439 | ||
1440 | /* Redisplay may have been preempted because there was input | |
1441 | available, and it assumes it will be called again after the | |
1442 | input has been processed. If the only input available was | |
1443 | the sort that we have just disabled, then we need to call | |
1444 | redisplay. */ | |
1445 | if (!readable_events ()) | |
1446 | { | |
1447 | redisplay_preserve_echo_area (); | |
1448 | get_input_pending (&input_pending); | |
1449 | } | |
1450 | } | |
1451 | } | |
1452 | ||
1453 | DEFUN ("track-mouse", Ftrack_mouse, Strack_mouse, 0, UNEVALLED, 0, | |
1454 | "Evaluate BODY with mouse movement and button release events enabled.\n\ | |
3371bdfc RS |
1455 | Within a `track-mouse', mouse motion and button releases generate input\n\ |
1456 | events that you can read with `read-event'.\n\ | |
1457 | Normally, these occurrences don't generate events.") | |
284f4730 JB |
1458 | (args) |
1459 | Lisp_Object args; | |
1460 | { | |
1461 | int count = specpdl_ptr - specpdl; | |
1462 | Lisp_Object val; | |
1463 | ||
1464 | XSET (val, Lisp_Int, do_mouse_tracking); | |
1465 | record_unwind_protect (tracking_off, val); | |
1466 | ||
1467 | do_mouse_tracking = 1; | |
1468 | ||
1469 | val = Fprogn (args); | |
1470 | return unbind_to (count, val); | |
1471 | } | |
1472 | ||
1473 | /* Store an event obtained at interrupt level into kbd_buffer, fifo */ | |
1474 | ||
1475 | void | |
1476 | kbd_buffer_store_event (event) | |
1477 | register struct input_event *event; | |
1478 | { | |
1479 | if (event->kind == no_event) | |
1480 | abort (); | |
1481 | ||
1482 | if (event->kind == ascii_keystroke) | |
1483 | { | |
1484 | register int c = XFASTINT (event->code) & 0377; | |
1485 | ||
1486 | if (c == quit_char | |
1487 | || ((c == (0200 | quit_char)) && !meta_key)) | |
1488 | { | |
1489 | /* If this results in a quit_char being returned to Emacs as | |
ff11dfa1 | 1490 | input, set last-event-frame properly. If this doesn't |
284f4730 | 1491 | get returned to Emacs as an event, the next event read |
ff11dfa1 | 1492 | will set Vlast_event_frame again, so this is safe to do. */ |
284f4730 | 1493 | extern SIGTYPE interrupt_signal (); |
ff11dfa1 | 1494 | Vlast_event_frame = FRAME_FOCUS_FRAME (event->frame); |
ffd56f97 | 1495 | last_event_timestamp = event->timestamp; |
284f4730 JB |
1496 | interrupt_signal (); |
1497 | return; | |
1498 | } | |
1499 | ||
1500 | if (c && c == stop_character) | |
1501 | { | |
1502 | sys_suspend (); | |
1503 | return; | |
1504 | } | |
1505 | ||
1506 | XSET (event->code, Lisp_Int, c); | |
1507 | } | |
1508 | ||
1509 | if (kbd_store_ptr - kbd_buffer == KBD_BUFFER_SIZE) | |
1510 | kbd_store_ptr = kbd_buffer; | |
1511 | ||
1512 | /* Don't let the very last slot in the buffer become full, | |
1513 | since that would make the two pointers equal, | |
1514 | and that is indistinguishable from an empty buffer. | |
1515 | Discard the event if it would fill the last slot. */ | |
1516 | if (kbd_fetch_ptr - 1 != kbd_store_ptr) | |
1517 | { | |
1518 | kbd_store_ptr->kind = event->kind; | |
1519 | kbd_store_ptr->code = event->code; | |
1520 | kbd_store_ptr->part = event->part; | |
ff11dfa1 | 1521 | kbd_store_ptr->frame = event->frame; |
284f4730 JB |
1522 | kbd_store_ptr->modifiers = event->modifiers; |
1523 | kbd_store_ptr->x = event->x; | |
1524 | kbd_store_ptr->y = event->y; | |
1525 | kbd_store_ptr->timestamp = event->timestamp; | |
1526 | ||
1527 | kbd_store_ptr++; | |
1528 | } | |
1529 | } | |
1530 | ||
1531 | static Lisp_Object make_lispy_event (); | |
1532 | static Lisp_Object make_lispy_movement (); | |
1533 | static Lisp_Object modify_event_symbol (); | |
1534 | ||
1535 | static Lisp_Object | |
1536 | kbd_buffer_get_event () | |
1537 | { | |
1538 | register int c; | |
1539 | Lisp_Object obj; | |
1540 | ||
1541 | if (noninteractive) | |
1542 | { | |
1543 | c = getchar (); | |
1544 | XSET (obj, Lisp_Int, c); | |
1545 | return obj; | |
1546 | } | |
1547 | ||
1548 | /* Wait until there is input available. */ | |
1549 | for (;;) | |
1550 | { | |
1551 | ||
1552 | /* Process or toss any events that we don't want to return as | |
1553 | input. The fact that we remove undesirable events here | |
1554 | allows us to use EVENT_QUEUES_EMPTY in the rest of this loop. */ | |
1555 | if (! do_mouse_tracking) | |
1556 | while (kbd_fetch_ptr != kbd_store_ptr) | |
1557 | { | |
1558 | if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE) | |
1559 | kbd_fetch_ptr = kbd_buffer; | |
1560 | ||
1561 | if (kbd_fetch_ptr->kind == mouse_click | |
1562 | || kbd_fetch_ptr->kind == scrollbar_click) | |
1563 | { | |
1564 | if ((kbd_fetch_ptr->modifiers & up_modifier) == 0) | |
1565 | break; | |
1566 | } | |
1567 | else | |
1568 | break; | |
1569 | ||
1570 | kbd_fetch_ptr++; | |
1571 | } | |
1572 | ||
1573 | if (!EVENT_QUEUES_EMPTY) | |
1574 | break; | |
1575 | ||
1576 | /* If the quit flag is set, then read_char will return | |
1577 | quit_char, so that counts as "available input." */ | |
1578 | if (!NILP (Vquit_flag)) | |
1579 | quit_throw_to_read_char (); | |
1580 | ||
1581 | /* One way or another, wait until input is available; then, if | |
1582 | interrupt handlers have not read it, read it now. */ | |
1583 | ||
1584 | #ifdef OLDVMS | |
1585 | wait_for_kbd_input (); | |
1586 | #else | |
1587 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
1588 | #ifdef SIGIO | |
1589 | gobble_input (0); | |
1590 | #endif /* SIGIO */ | |
1591 | if (EVENT_QUEUES_EMPTY) | |
1592 | { | |
f76475ad JB |
1593 | Lisp_Object minus_one; |
1594 | ||
1595 | XSET (minus_one, Lisp_Int, -1); | |
1596 | wait_reading_process_input (0, 0, minus_one, 1); | |
284f4730 JB |
1597 | |
1598 | if (!interrupt_input && EVENT_QUEUES_EMPTY) | |
1599 | { | |
1600 | read_avail_input (0); | |
1601 | } | |
1602 | } | |
1603 | #endif /* not VMS */ | |
1604 | } | |
1605 | ||
1606 | /* At this point, we know that there is a readable event available | |
1607 | somewhere. If the event queue is empty, then there must be a | |
1608 | mouse movement enabled and available. */ | |
1609 | if (kbd_fetch_ptr != kbd_store_ptr) | |
1610 | { | |
1611 | if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE) | |
1612 | kbd_fetch_ptr = kbd_buffer; | |
ff11dfa1 | 1613 | /* Do the redirection specified by the focus_frame |
daa37602 | 1614 | member now, before we return this event. */ |
ff11dfa1 JB |
1615 | kbd_fetch_ptr->frame = |
1616 | XFRAME (FRAME_FOCUS_FRAME (kbd_fetch_ptr->frame)); | |
1617 | XSET (Vlast_event_frame, Lisp_Frame, kbd_fetch_ptr->frame); | |
1113d9db | 1618 | last_event_timestamp = kbd_fetch_ptr->timestamp; |
284f4730 JB |
1619 | obj = make_lispy_event (kbd_fetch_ptr); |
1620 | kbd_fetch_ptr->kind = no_event; | |
1621 | kbd_fetch_ptr++; | |
1622 | if (XTYPE (obj) == Lisp_Int) | |
1623 | XSET (obj, Lisp_Int, XINT (obj) & (meta_key ? 0377 : 0177)); | |
1624 | } | |
1625 | else if (do_mouse_tracking && mouse_moved) | |
1626 | { | |
ff11dfa1 | 1627 | FRAME_PTR frame; |
e5d77022 JB |
1628 | Lisp_Object x, y; |
1629 | unsigned long time; | |
284f4730 | 1630 | |
ff11dfa1 JB |
1631 | (*mouse_position_hook) (&frame, &x, &y, &time); |
1632 | XSET (Vlast_event_frame, Lisp_Frame, frame); | |
284f4730 | 1633 | |
ff11dfa1 | 1634 | obj = make_lispy_movement (frame, x, y, time); |
284f4730 JB |
1635 | } |
1636 | else | |
1637 | /* We were promised by the above while loop that there was | |
1638 | something for us to read! */ | |
1639 | abort (); | |
1640 | ||
1641 | input_pending = readable_events (); | |
1642 | ||
1643 | return (obj); | |
1644 | } | |
1645 | ||
1646 | /* Caches for modify_event_symbol. */ | |
1647 | static Lisp_Object func_key_syms; | |
1648 | static Lisp_Object mouse_syms; | |
1649 | ||
1650 | /* You'll notice that this table is arranged to be conveniently | |
1651 | indexed by X Windows keysym values. */ | |
1652 | static char *lispy_function_keys[] = | |
1653 | { | |
1654 | /* X Keysym value */ | |
1655 | ||
1656 | "home", /* 0xff50 */ /* IsCursorKey */ | |
1657 | "left", | |
1658 | "up", | |
1659 | "right", | |
1660 | "down", | |
1661 | "prior", | |
1662 | "next", | |
1663 | "end", | |
1664 | "begin", | |
1665 | 0, /* 0xff59 */ | |
1666 | 0, 0, 0, 0, 0, 0, | |
1667 | "select", /* 0xff60 */ /* IsMiscFunctionKey */ | |
1668 | "print", | |
1669 | "execute", | |
1670 | "insert", | |
1671 | 0, /* 0xff64 */ | |
1672 | "undo", | |
1673 | "redo", | |
1674 | "menu", | |
1675 | "find", | |
1676 | "cancel", | |
1677 | "help", | |
1678 | "break", /* 0xff6b */ | |
1679 | ||
1680 | /* Here are some keys found mostly on HP keyboards. The X event | |
1681 | handling code will strip bit 29, which flags vendor-specific | |
1682 | keysyms. */ | |
1683 | "reset", /* 0x1000ff6c */ | |
1684 | "system", | |
1685 | "user", | |
1686 | "clearline", | |
1687 | "insertline", | |
1688 | "deleteline", | |
1689 | "insertchar", | |
1690 | "deletechar", | |
1691 | "backtab", | |
1692 | "kp_backtab", /* 0x1000ff75 */ | |
1693 | 0, /* 0xff76 */ | |
1694 | 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff7f */ | |
1695 | "kp-space", /* 0xff80 */ /* IsKeypadKey */ | |
1696 | 0, 0, 0, 0, 0, 0, 0, 0, | |
1697 | "kp-tab", /* 0xff89 */ | |
1698 | 0, 0, 0, | |
1699 | "kp-enter", /* 0xff8d */ | |
1700 | 0, 0, 0, | |
1701 | "kp-f1", /* 0xff91 */ | |
1702 | "kp-f2", | |
1703 | "kp-f3", | |
1704 | "kp-f4", | |
1705 | 0, /* 0xff95 */ | |
1706 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
1707 | "kp-multiply", /* 0xffaa */ | |
1708 | "kp-add", | |
1709 | "kp-separator", | |
1710 | "kp-subtract", | |
1711 | "kp-decimal", | |
1712 | "kp-divide", /* 0xffaf */ | |
1713 | "kp-0", /* 0xffb0 */ | |
1714 | "kp-1", "kp-2", "kp-3", "kp-4", "kp-5", "kp-6", "kp-7", "kp-8", "kp-9", | |
1715 | 0, /* 0xffba */ | |
1716 | 0, 0, | |
1717 | "kp-equal", /* 0xffbd */ | |
1718 | "f1", /* 0xffbe */ /* IsFunctionKey */ | |
1719 | "f2", "f3", "f4", | |
1720 | "f5", "f6", "f7", "f8", "f9", "f10", "f11", "f12", | |
1721 | "f13", "f14", "f15", "f16", "f17", "f18", "f19", "f20", | |
1722 | "f21", "f22", "f23", "f24", "f25", "f26", "f27", "f28", | |
1723 | "f29", "f30", "f31", "f32", "f33", "f34", "f35" /* 0xffe0 */ | |
1724 | }; | |
1725 | ||
1726 | static char *lispy_mouse_names[] = | |
1727 | { | |
1728 | "mouse-1", "mouse-2", "mouse-3", "mouse-4", "mouse-5" | |
1729 | }; | |
1730 | ||
1731 | /* Given a struct input_event, build the lisp event which represents | |
1732 | it. If EVENT is 0, build a mouse movement event from the mouse | |
1733 | movement buffer, which should have a movement event in it. */ | |
1734 | ||
1735 | static Lisp_Object | |
1736 | make_lispy_event (event) | |
1737 | struct input_event *event; | |
1738 | { | |
1739 | #ifdef SWITCH_ENUM_BUG | |
1740 | switch ((int) event->kind) | |
1741 | #else | |
1742 | switch (event->kind) | |
1743 | #endif | |
1744 | { | |
1745 | ||
1746 | /* A simple keystroke. */ | |
1747 | case ascii_keystroke: | |
1748 | return event->code; | |
1749 | break; | |
1750 | ||
1751 | /* A function key. The symbol may need to have modifier prefixes | |
1752 | tacked onto it. */ | |
1753 | case non_ascii_keystroke: | |
1754 | return modify_event_symbol (XFASTINT (event->code), event->modifiers, | |
1755 | Qfunction_key, | |
1756 | lispy_function_keys, &func_key_syms, | |
1757 | (sizeof (lispy_function_keys) | |
1758 | / sizeof (lispy_function_keys[0]))); | |
1759 | break; | |
1760 | ||
1761 | /* A mouse click - build a list of the relevant information. */ | |
1762 | case mouse_click: | |
1763 | { | |
1764 | int part; | |
1765 | Lisp_Object window = | |
ff11dfa1 | 1766 | window_from_coordinates (event->frame, |
284f4730 JB |
1767 | XINT (event->x), XINT (event->y), |
1768 | &part); | |
1769 | Lisp_Object posn; | |
1770 | ||
1771 | if (XTYPE (window) != Lisp_Window) | |
1772 | posn = Qnil; | |
1773 | else | |
1774 | { | |
1775 | XSETINT (event->x, (XINT (event->x) | |
1776 | - XINT (XWINDOW (window)->left))); | |
1777 | XSETINT (event->y, (XINT (event->y) | |
1778 | - XINT (XWINDOW (window)->top))); | |
1779 | ||
1780 | if (part == 1) | |
1781 | posn = Qmode_line; | |
1782 | else if (part == 2) | |
e5d77022 | 1783 | posn = Qvertical_line; |
284f4730 JB |
1784 | else |
1785 | XSET (posn, Lisp_Int, | |
1786 | buffer_posn_from_coords (XWINDOW (window), | |
1787 | XINT (event->x), | |
1788 | XINT (event->y))); | |
1789 | } | |
1790 | ||
1791 | return Fcons (modify_event_symbol (XFASTINT (event->code) - 1, | |
1792 | event->modifiers, | |
1793 | Qmouse_click, | |
1794 | lispy_mouse_names, &mouse_syms, | |
1795 | (sizeof (lispy_mouse_names) | |
1796 | / sizeof (lispy_mouse_names[0]))), | |
1797 | Fcons (window, | |
1798 | Fcons (posn, | |
1799 | Fcons (Fcons (event->x, event->y), | |
1113d9db JB |
1800 | Fcons (make_number |
1801 | (event->timestamp), | |
284f4730 JB |
1802 | Qnil))))); |
1803 | } | |
1804 | ||
1805 | /* A scrollbar click. Build a list containing the relevant | |
1806 | information. */ | |
1807 | case scrollbar_click: | |
1808 | { | |
1809 | Lisp_Object button | |
1810 | = modify_event_symbol (XFASTINT (event->code) - 1, | |
1811 | event->modifiers, | |
1812 | Qmouse_click, | |
1813 | lispy_mouse_names, &mouse_syms, | |
1814 | (sizeof (lispy_mouse_names) | |
1815 | / sizeof (lispy_mouse_names[0]))); | |
1816 | return Fcons (event->part, | |
ff11dfa1 | 1817 | Fcons (FRAME_SELECTED_WINDOW (event->frame), |
284f4730 JB |
1818 | Fcons (button, |
1819 | Fcons (Fcons (event->x, event->y), | |
1113d9db JB |
1820 | Fcons (make_number |
1821 | (event->timestamp), | |
284f4730 JB |
1822 | Qnil))))); |
1823 | } | |
1824 | ||
1825 | /* The 'kind' field of the event is something we don't recognize. */ | |
1826 | default: | |
1827 | abort(); | |
1828 | } | |
1829 | } | |
1830 | ||
1831 | static Lisp_Object | |
ff11dfa1 JB |
1832 | make_lispy_movement (frame, x, y, time) |
1833 | FRAME_PTR frame; | |
284f4730 | 1834 | Lisp_Object x, y; |
e5d77022 | 1835 | unsigned long time; |
284f4730 JB |
1836 | { |
1837 | Lisp_Object window; | |
1838 | int ix, iy; | |
1839 | Lisp_Object posn; | |
1840 | int part; | |
1841 | ||
1842 | ix = XINT (x); | |
1843 | iy = XINT (y); | |
ff11dfa1 JB |
1844 | window = (frame |
1845 | ? window_from_coordinates (frame, ix, iy, &part) | |
284f4730 JB |
1846 | : Qnil); |
1847 | if (XTYPE (window) != Lisp_Window) | |
1848 | posn = Qnil; | |
1849 | else | |
1850 | { | |
1851 | ix -= XINT (XWINDOW (window)->left); | |
1852 | iy -= XINT (XWINDOW (window)->top); | |
1853 | if (part == 1) | |
1854 | posn = Qmode_line; | |
1855 | else if (part == 2) | |
e5d77022 | 1856 | posn = Qvertical_line; |
284f4730 JB |
1857 | else |
1858 | XSET (posn, Lisp_Int, buffer_posn_from_coords (XWINDOW (window), | |
1859 | ix, iy)); | |
1860 | } | |
1861 | ||
1862 | XSETINT (x, ix); | |
1863 | XSETINT (y, iy); | |
1864 | return Fcons (Qmouse_movement, | |
1865 | Fcons (window, | |
1866 | Fcons (posn, | |
1867 | Fcons (Fcons (x, y), | |
e5d77022 | 1868 | Fcons (make_number (time), Qnil))))); |
284f4730 JB |
1869 | } |
1870 | ||
1871 | ||
1872 | ||
1873 | /* Place the written representation of MODIFIERS in BUF, '\0'-terminated, | |
1874 | and return its length. */ | |
1875 | ||
1876 | static int | |
1877 | format_modifiers (modifiers, buf) | |
1878 | int modifiers; | |
1879 | char *buf; | |
1880 | { | |
1881 | char *p = buf; | |
1882 | ||
284f4730 | 1883 | if (modifiers & ctrl_modifier) { *p++ = 'C'; *p++ = '-'; } |
1113d9db | 1884 | if (modifiers & meta_modifier) { *p++ = 'M'; *p++ = '-'; } |
284f4730 JB |
1885 | if (modifiers & shift_modifier) { *p++ = 'S'; *p++ = '-'; } |
1886 | if (modifiers & up_modifier) { *p++ = 'U'; *p++ = '-'; } | |
1887 | *p = '\0'; | |
1888 | ||
1889 | return p - buf; | |
1890 | } | |
1891 | ||
1892 | ||
1893 | /* Given a symbol whose name begins with modifiers ("C-", "M-", etc), | |
1894 | return a symbol with the modifiers placed in the canonical order. | |
1895 | ||
1896 | Fdefine_key calls this to make sure that (for example) C-M-foo | |
1897 | and M-C-foo end up being equivalent in the keymap. */ | |
1898 | ||
1899 | Lisp_Object | |
1900 | reorder_modifiers (symbol) | |
1901 | Lisp_Object symbol; | |
1902 | { | |
1903 | struct Lisp_String *name; | |
1904 | int i; | |
1905 | int modifiers; | |
1906 | int not_canonical; | |
1907 | ||
1908 | CHECK_SYMBOL (symbol, 1); | |
1909 | ||
1910 | modifiers = 0; | |
1911 | name = XSYMBOL (symbol)->name; | |
1912 | ||
1913 | /* Special case for things with only one modifier, which is | |
1914 | (hopefully) the vast majority of cases. */ | |
1915 | if (! (name->size >= 4 && name->data[1] == '-' && name->data[3] == '-')) | |
1916 | return symbol; | |
1917 | ||
1918 | for (i = 0; i + 1 < name->size && name->data[i + 1] == '-'; i += 2) | |
1919 | switch (name->data[i]) | |
1920 | { | |
1921 | case 'M': | |
1922 | not_canonical |= (modifiers & (meta_modifier|ctrl_modifier | |
1923 | |shift_modifier|up_modifier)); | |
1924 | modifiers |= meta_modifier; | |
1925 | break; | |
1926 | ||
1927 | case 'C': | |
1928 | not_canonical |= (modifiers & | |
1929 | (ctrl_modifier|shift_modifier|up_modifier)); | |
1930 | modifiers |= ctrl_modifier; | |
1931 | break; | |
1932 | ||
1933 | case 'S': | |
1934 | not_canonical |= (modifiers & (shift_modifier|up_modifier)); | |
1935 | modifiers |= shift_modifier; | |
1936 | break; | |
1937 | ||
1938 | case 'U': | |
1939 | not_canonical |= (modifiers & (up_modifier)); | |
1940 | modifiers |= up_modifier; | |
1941 | break; | |
1942 | ||
1943 | default: | |
1944 | goto no_more_modifiers; | |
1945 | } | |
1946 | no_more_modifiers: | |
1947 | ||
1948 | if (!not_canonical) | |
1949 | return symbol; | |
1950 | ||
1951 | /* The modifiers were out of order, so find a new symbol with the | |
1952 | mods in order. Since the symbol name could contain nulls, we can't | |
1953 | use intern here; we have to use Fintern, which expects a genuine | |
1954 | Lisp_String, and keeps a reference to it. */ | |
1955 | { | |
1956 | char *new_mods = (char *) alloca (sizeof ("C-M-S-U-")); | |
1957 | int len = format_modifiers (modifiers, new_mods); | |
1958 | Lisp_Object new_name = make_uninit_string (len + name->size - i); | |
1959 | ||
1960 | bcopy (new_mods, XSTRING (new_name)->data, len); | |
1961 | bcopy (name->data + i, XSTRING (new_name)->data + len, name->size - i); | |
1962 | ||
1963 | return Fintern (new_name, Qnil); | |
1964 | } | |
1965 | } | |
1966 | ||
1967 | ||
1968 | /* For handling events, we often want to produce a symbol whose name | |
1969 | is a series of modifier key prefixes ("M-", "C-", etcetera) attached | |
1970 | to some base, like the name of a function key or mouse button. | |
1971 | modify_event_symbol produces symbols of this sort. | |
1972 | ||
1973 | NAME_TABLE should point to an array of strings, such that NAME_TABLE[i] | |
1974 | is the name of the i'th symbol. TABLE_SIZE is the number of elements | |
1975 | in the table. | |
1976 | ||
1977 | SYMBOL_TABLE should be a pointer to a Lisp_Object whose value will | |
1978 | persist between calls to modify_event_symbol that it can use to | |
1979 | store a cache of the symbols it's generated for this NAME_TABLE | |
1980 | before. | |
1981 | ||
1982 | SYMBOL_NUM is the number of the base name we want from NAME_TABLE. | |
1983 | ||
1984 | MODIFIERS is a set of modifier bits (as given in struct input_events) | |
1985 | whose prefixes should be applied to the symbol name. | |
1986 | ||
1987 | SYMBOL_KIND is the value to be placed in the event_kind property of | |
1988 | the returned symbol. */ | |
1989 | ||
1990 | static Lisp_Object | |
1991 | modify_event_symbol (symbol_num, modifiers, symbol_kind, name_table, | |
1992 | symbol_table, table_size) | |
1993 | int symbol_num; | |
1994 | unsigned modifiers; | |
1995 | Lisp_Object symbol_kind; | |
1996 | char **name_table; | |
1997 | Lisp_Object *symbol_table; | |
1998 | int table_size; | |
1999 | { | |
2000 | Lisp_Object *slot, *unmodified_slot; | |
2001 | ||
2002 | /* Is this a request for a valid symbol? */ | |
2003 | if (symbol_num < 0 || symbol_num >= table_size | |
2004 | || modifiers >= NUM_MODIFIER_COMBOS) | |
2005 | abort (); | |
2006 | ||
2007 | /* If *symbol_table is not a vector of the appropriate size, | |
2008 | set it to one. */ | |
2009 | if (XTYPE (*symbol_table) != Lisp_Vector | |
2010 | || XVECTOR (*symbol_table)->size != table_size) | |
2011 | *symbol_table = Fmake_vector (make_number (table_size), Qnil); | |
2012 | ||
2013 | unmodified_slot = slot = & XVECTOR (*symbol_table)->contents[symbol_num]; | |
2014 | ||
2015 | /* If there are modifier keys, there had better be a vector in | |
2016 | this symbol's position of the symbol_table. */ | |
2017 | if (modifiers != 0) | |
2018 | { | |
2019 | Lisp_Object slot_contents = *slot; | |
2020 | ||
2021 | /* If there isn't the right sort of vector there, put one in. */ | |
2022 | if (XTYPE (slot_contents) != Lisp_Vector | |
2023 | || XVECTOR (slot_contents)->size != NUM_MODIFIER_COMBOS) | |
2024 | { | |
2025 | *slot = Fmake_vector (make_number (NUM_MODIFIER_COMBOS), Qnil); | |
2026 | ||
2027 | /* Make sure that the vector has an entry for the unmodified | |
2028 | symbol, so we can put it on the event_unmodified property. */ | |
2029 | if (! NILP (slot_contents)) | |
2030 | XVECTOR (*slot)->contents[0] = slot_contents; | |
2031 | else | |
2032 | XVECTOR (*slot)->contents[0] = intern (name_table [symbol_num]); | |
2033 | } | |
2034 | } | |
2035 | ||
2036 | /* If this entry has been filled in with a modified symbol vector, | |
2037 | point to the appropriate slot within that. */ | |
2038 | if (XTYPE (*slot) == Lisp_Vector) | |
2039 | { | |
2040 | unmodified_slot = & XVECTOR (*slot)->contents[0]; | |
2041 | slot = & XVECTOR (*slot)->contents[modifiers]; | |
2042 | } | |
2043 | ||
2044 | /* Make sure we have an unmodified version of the symbol in its | |
2045 | proper place? */ | |
2046 | if (NILP (*unmodified_slot)) | |
2047 | { | |
2048 | *unmodified_slot = intern (name_table [symbol_num]); | |
2049 | Fput (*unmodified_slot, Qevent_kind, symbol_kind); | |
2050 | Fput (*unmodified_slot, Qevent_unmodified, *unmodified_slot); | |
2051 | } | |
2052 | ||
2053 | /* Have we already created a symbol for this combination of modifiers? */ | |
2054 | if (NILP (*slot)) | |
2055 | { | |
2056 | /* No, let's create one. */ | |
2057 | char *modified_name | |
2058 | = (char *) alloca (sizeof ("C-M-S-U-") | |
2059 | + strlen (name_table [symbol_num])); | |
2060 | ||
2061 | strcpy (modified_name + format_modifiers (modifiers, modified_name), | |
2062 | name_table [symbol_num]); | |
2063 | ||
2064 | *slot = intern (modified_name); | |
2065 | Fput (*slot, Qevent_kind, symbol_kind); | |
2066 | Fput (*slot, Qevent_unmodified, *unmodified_slot); | |
2067 | } | |
2068 | ||
2069 | return *slot; | |
2070 | } | |
2071 | \f | |
2072 | DEFUN ("mouse-click-p", Fmouse_click_p, Smouse_click_p, 1, 1, 0, | |
2073 | "Return non-nil iff OBJECT is a representation of a mouse event.\n\ | |
2074 | A mouse event is a list of five elements whose car is a symbol of the\n\ | |
2075 | form <MODIFIERS>mouse-<DIGIT>. I hope this is a temporary hack.") | |
2076 | (object) | |
2077 | Lisp_Object object; | |
2078 | { | |
2079 | if (EVENT_HAS_PARAMETERS (object) | |
2080 | && EQ (EVENT_HEAD_KIND (EVENT_HEAD (object)), | |
2081 | Qmouse_click)) | |
2082 | return Qt; | |
2083 | else | |
2084 | return Qnil; | |
2085 | } | |
2086 | \f | |
2087 | /* Store into *addr a value nonzero if terminal input chars are available. | |
2088 | Serves the purpose of ioctl (0, FIONREAD, addr) | |
2089 | but works even if FIONREAD does not exist. | |
2090 | (In fact, this may actually read some input.) */ | |
2091 | ||
2092 | static void | |
2093 | get_input_pending (addr) | |
2094 | int *addr; | |
2095 | { | |
2096 | /* First of all, have we already counted some input? */ | |
2097 | *addr = !NILP (Vquit_flag) || readable_events (); | |
2098 | ||
2099 | /* If input is being read as it arrives, and we have none, there is none. */ | |
2100 | if (*addr > 0 || (interrupt_input && ! interrupts_deferred)) | |
2101 | return; | |
2102 | ||
2103 | /* Try to read some input and see how much we get. */ | |
2104 | gobble_input (0); | |
2105 | *addr = !NILP (Vquit_flag) || readable_events (); | |
2106 | } | |
2107 | ||
2108 | /* Interface to read_avail_input, blocking SIGIO if necessary. */ | |
2109 | ||
2110 | int | |
2111 | gobble_input (expected) | |
2112 | int expected; | |
2113 | { | |
2114 | #ifndef VMS | |
2115 | #ifdef SIGIO | |
2116 | if (interrupt_input) | |
2117 | { | |
32676c08 | 2118 | SIGMASKTYPE mask; |
e065a56e | 2119 | mask = sigblockx (SIGIO); |
284f4730 | 2120 | read_avail_input (expected); |
e065a56e | 2121 | sigsetmask (mask); |
284f4730 JB |
2122 | } |
2123 | else | |
2124 | #endif | |
2125 | read_avail_input (expected); | |
2126 | #endif | |
2127 | } | |
2128 | \f | |
2129 | #ifndef VMS | |
2130 | ||
2131 | /* Read any terminal input already buffered up by the system | |
2132 | into the kbd_buffer, but do not wait. | |
2133 | ||
2134 | EXPECTED should be nonzero if the caller knows there is some input. | |
2135 | ||
2136 | Except on VMS, all input is read by this function. | |
2137 | If interrupt_input is nonzero, this function MUST be called | |
2138 | only when SIGIO is blocked. | |
2139 | ||
2140 | Returns the number of keyboard chars read, or -1 meaning | |
2141 | this is a bad time to try to read input. */ | |
2142 | ||
2143 | static int | |
2144 | read_avail_input (expected) | |
2145 | int expected; | |
2146 | { | |
2147 | struct input_event buf[KBD_BUFFER_SIZE]; | |
2148 | register int i; | |
2149 | int nread; | |
2150 | ||
2151 | if (read_socket_hook) | |
2152 | /* No need for FIONREAD or fcntl; just say don't wait. */ | |
2153 | nread = (*read_socket_hook) (0, buf, KBD_BUFFER_SIZE, expected, expected); | |
2154 | else | |
2155 | { | |
2156 | unsigned char cbuf[KBD_BUFFER_SIZE]; | |
2157 | ||
2158 | #ifdef FIONREAD | |
2159 | /* Find out how much input is available. */ | |
2160 | if (ioctl (0, FIONREAD, &nread) < 0) | |
2161 | /* Formerly simply reported no input, but that sometimes led to | |
2162 | a failure of Emacs to terminate. | |
2163 | SIGHUP seems appropriate if we can't reach the terminal. */ | |
2164 | kill (getpid (), SIGHUP); | |
2165 | if (nread == 0) | |
2166 | return 0; | |
2167 | if (nread > sizeof cbuf) | |
2168 | nread = sizeof cbuf; | |
2169 | #else /* no FIONREAD */ | |
2170 | #ifdef USG | |
2171 | /* Read some input if available, but don't wait. */ | |
2172 | nread = sizeof cbuf; | |
2173 | fcntl (fileno (stdin), F_SETFL, O_NDELAY); | |
2174 | #else | |
2175 | you lose; | |
2176 | #endif | |
2177 | #endif | |
2178 | ||
2179 | /* Now read; for one reason or another, this will not block. */ | |
2180 | while (1) | |
2181 | { | |
2182 | nread = read (fileno (stdin), cbuf, nread); | |
2183 | #ifdef AIX | |
2184 | /* The kernel sometimes fails to deliver SIGHUP for ptys. | |
2185 | This looks incorrect, but it isn't, because _BSD causes | |
2186 | O_NDELAY to be defined in fcntl.h as O_NONBLOCK, | |
2187 | and that causes a value other than 0 when there is no input. */ | |
2188 | if (nread == 0) | |
2189 | kill (SIGHUP, 0); | |
2190 | #endif | |
2191 | /* Retry the read if it is interrupted. */ | |
2192 | if (nread >= 0 | |
2193 | || ! (errno == EAGAIN || errno == EFAULT | |
2194 | #ifdef EBADSLT | |
2195 | || errno == EBADSLT | |
2196 | #endif | |
2197 | )) | |
2198 | break; | |
2199 | } | |
2200 | ||
2201 | #ifndef FIONREAD | |
2202 | #ifdef USG | |
2203 | fcntl (fileno (stdin), F_SETFL, 0); | |
2204 | #endif /* USG */ | |
2205 | #endif /* no FIONREAD */ | |
2206 | for (i = 0; i < nread; i++) | |
2207 | { | |
2208 | buf[i].kind = ascii_keystroke; | |
2209 | XSET (buf[i].code, Lisp_Int, cbuf[i]); | |
ff11dfa1 | 2210 | buf[i].frame = selected_frame; |
284f4730 JB |
2211 | } |
2212 | } | |
2213 | ||
2214 | /* Scan the chars for C-g and store them in kbd_buffer. */ | |
2215 | for (i = 0; i < nread; i++) | |
2216 | { | |
2217 | kbd_buffer_store_event (&buf[i]); | |
2218 | /* Don't look at input that follows a C-g too closely. | |
2219 | This reduces lossage due to autorepeat on C-g. */ | |
2220 | if (buf[i].kind == ascii_keystroke | |
2221 | && XINT(buf[i].code) == quit_char) | |
2222 | break; | |
2223 | } | |
2224 | ||
2225 | return nread; | |
2226 | } | |
2227 | #endif /* not VMS */ | |
2228 | \f | |
2229 | #ifdef SIGIO /* for entire page */ | |
2230 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
2231 | ||
2232 | input_available_signal (signo) | |
2233 | int signo; | |
2234 | { | |
2235 | /* Must preserve main program's value of errno. */ | |
2236 | int old_errno = errno; | |
2237 | #ifdef BSD4_1 | |
2238 | extern int select_alarmed; | |
2239 | #endif | |
2240 | ||
2241 | #ifdef USG | |
2242 | /* USG systems forget handlers when they are used; | |
2243 | must reestablish each time */ | |
2244 | signal (signo, input_available_signal); | |
2245 | #endif /* USG */ | |
2246 | ||
2247 | #ifdef BSD4_1 | |
2248 | sigisheld (SIGIO); | |
2249 | #endif | |
2250 | ||
ffd56f97 JB |
2251 | if (input_available_clear_time) |
2252 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
284f4730 JB |
2253 | |
2254 | while (1) | |
2255 | { | |
2256 | int nread; | |
2257 | nread = read_avail_input (1); | |
2258 | /* -1 means it's not ok to read the input now. | |
2259 | UNBLOCK_INPUT will read it later; now, avoid infinite loop. | |
2260 | 0 means there was no keyboard input available. */ | |
2261 | if (nread <= 0) | |
2262 | break; | |
2263 | ||
2264 | #ifdef BSD4_1 | |
2265 | select_alarmed = 1; /* Force the select emulator back to life */ | |
2266 | #endif | |
2267 | } | |
2268 | ||
2269 | #ifdef BSD4_1 | |
2270 | sigfree (); | |
2271 | #endif | |
2272 | errno = old_errno; | |
2273 | } | |
2274 | #endif /* SIGIO */ | |
2275 | \f | |
2276 | /* Return the prompt-string of a sparse keymap. | |
2277 | This is the first element which is a string. | |
2278 | Return nil if there is none. */ | |
2279 | ||
2280 | Lisp_Object | |
2281 | map_prompt (map) | |
2282 | Lisp_Object map; | |
2283 | { | |
2284 | while (CONSP (map)) | |
2285 | { | |
2286 | register Lisp_Object tem; | |
2287 | tem = Fcar (map); | |
2288 | if (XTYPE (tem) == Lisp_String) | |
2289 | return tem; | |
2290 | map = Fcdr (map); | |
2291 | } | |
2292 | return Qnil; | |
2293 | } | |
2294 | ||
2295 | static int echo_flag; | |
2296 | static int echo_now; | |
2297 | ||
2298 | /* Read a character like read_char but optionally prompt based on maps | |
2299 | LOCAL and GLOBAL. | |
2300 | ||
2301 | The prompting is done based on the prompt-string of the map | |
2302 | and the strings associated with various map elements. */ | |
2303 | ||
2304 | Lisp_Object | |
2305 | read_char_menu_prompt (prompt, local, global) | |
2306 | int prompt; | |
2307 | Lisp_Object local, global; | |
2308 | { | |
2309 | register Lisp_Object rest, name; | |
2310 | Lisp_Object hmap; | |
2311 | int nlength; | |
ff11dfa1 | 2312 | int width = FRAME_WIDTH (selected_frame) - 4; |
284f4730 JB |
2313 | char *menu = (char *) alloca (width); |
2314 | ||
2315 | /* Use local over global Menu maps */ | |
2316 | ||
2317 | if (menu_prompting) | |
2318 | return read_char (!prompt); | |
2319 | ||
2320 | /* We can't get prompt strings from dense keymaps. */ | |
2321 | if (CONSP (local) | |
2322 | && EQ (Fcar (local), Qkeymap) | |
2323 | && !(CONSP (XCONS (local)->cdr) | |
2324 | && XTYPE (XCONS (XCONS (local)->cdr)->car) == Lisp_Vector)) | |
2325 | hmap = local; | |
2326 | else if (CONSP (global) | |
2327 | && EQ (Fcar (global), Qkeymap) | |
2328 | && !(CONSP (XCONS (global)->cdr) | |
2329 | && XTYPE (XCONS (XCONS (global)->cdr)->car) == Lisp_Vector)) | |
2330 | hmap = global; | |
2331 | else | |
2332 | return read_char (!prompt); | |
2333 | ||
2334 | /* Get the map's prompt string. */ | |
2335 | name = map_prompt (hmap); | |
2336 | if (NILP (name)) | |
2337 | return read_char (!prompt); | |
2338 | ||
2339 | /* Prompt string always starts with map's prompt, and a space. */ | |
2340 | strcpy (menu, XSTRING (name)->data); | |
2341 | nlength = XSTRING (name)->size; | |
2342 | menu[nlength++] = ' '; | |
2343 | menu[nlength] = 0; | |
2344 | ||
2345 | /* Start prompting at start of map. */ | |
2346 | rest = hmap; /* Current menu item */ | |
2347 | ||
2348 | /* Present the documented bindings, a line at a time. */ | |
2349 | while (1) | |
2350 | { | |
2351 | int notfirst = 0; | |
2352 | int i = nlength; | |
2353 | Lisp_Object obj; | |
2354 | int ch; | |
2355 | ||
2356 | /* If reached end of map, start at beginning. */ | |
2357 | if (NILP (Fcdr (rest))) rest = hmap; | |
2358 | ||
2359 | /* Loop over elements of map. */ | |
2360 | while (!NILP (rest) && i < width) | |
2361 | { | |
2362 | Lisp_Object s; | |
2363 | ||
2364 | /* Look for conses whose cadrs are strings. */ | |
2365 | s = Fcar_safe (Fcdr_safe (Fcar_safe (rest))); | |
2366 | if (XTYPE (s) != Lisp_String) | |
2367 | /* Ignore all other elements. */ | |
2368 | ; | |
2369 | /* If first such element, or enough room, add string to prompt. */ | |
2370 | else if (XSTRING (s)->size + i < width | |
2371 | || !notfirst) | |
2372 | { | |
2373 | int thiswidth; | |
2374 | ||
2375 | /* Punctuate between strings. */ | |
2376 | if (notfirst) | |
2377 | { | |
2378 | strcpy (menu + i, ", "); | |
2379 | i += 2; | |
2380 | } | |
2381 | notfirst = 1; | |
2382 | ||
2383 | /* Add as much of string as fits. */ | |
2384 | thiswidth = XSTRING (s)->size; | |
2385 | if (thiswidth + i > width) | |
2386 | thiswidth = width - i; | |
2387 | bcopy (XSTRING (s)->data, menu + i, thiswidth); | |
2388 | i += thiswidth; | |
2389 | } | |
2390 | else | |
2391 | { | |
2392 | /* If some elts don't fit, show there are more. */ | |
2393 | strcpy (menu + i, "..."); | |
2394 | break; | |
2395 | } | |
2396 | ||
2397 | /* Move past this element. */ | |
2398 | rest = Fcdr_safe (rest); | |
2399 | } | |
2400 | ||
2401 | /* Prompt with that and read response. */ | |
2402 | message1 (menu); | |
2403 | obj = read_char (1); | |
2404 | ||
2405 | if (XTYPE (obj) != Lisp_Int) | |
2406 | return obj; | |
2407 | else | |
2408 | ch = XINT (obj); | |
2409 | ||
2410 | if (obj != menu_prompt_more_char | |
2411 | && (XTYPE (menu_prompt_more_char) != Lisp_Int | |
2412 | || obj != make_number (Ctl (XINT (menu_prompt_more_char))))) | |
2413 | return obj; | |
2414 | } | |
2415 | } | |
2416 | ||
2417 | \f | |
2418 | /* Reading key sequences. */ | |
2419 | ||
2420 | /* Follow KEY in the maps in CURRENT[0..NMAPS-1], placing its bindings | |
2421 | in DEFS[0..NMAPS-1]. Set NEXT[i] to DEFS[i] if DEFS[i] is a | |
2422 | keymap, or nil otherwise. Return the index of the first keymap in | |
2423 | which KEY has any binding, or NMAPS if no map has a binding. | |
2424 | ||
2425 | If KEY is a meta ASCII character, treat it like meta-prefix-char | |
2426 | followed by the corresponding non-meta character. Keymaps in | |
2427 | CURRENT with non-prefix bindings for meta-prefix-char become nil in | |
2428 | NEXT. | |
2429 | ||
2430 | When KEY is not defined in any of the keymaps, if it is an upper | |
2431 | case letter and there are bindings for the corresponding lower-case | |
2432 | letter, return the bindings for the lower-case letter. | |
2433 | ||
2434 | NEXT may == CURRENT. */ | |
2435 | ||
2436 | static int | |
2437 | follow_key (key, nmaps, current, defs, next) | |
2438 | Lisp_Object key; | |
2439 | Lisp_Object *current, *defs, *next; | |
2440 | int nmaps; | |
2441 | { | |
2442 | int i, first_binding; | |
2443 | ||
2444 | /* If KEY is a meta ASCII character, treat it like meta-prefix-char | |
2445 | followed by the corresponding non-meta character. */ | |
2446 | if (XTYPE (key) == Lisp_Int | |
2447 | && XINT (key) >= 0200) | |
2448 | { | |
2449 | for (i = 0; i < nmaps; i++) | |
2450 | if (! NILP (current[i])) | |
2451 | { | |
2452 | next[i] = get_keyelt (access_keymap (current[i], | |
2453 | meta_prefix_char)); | |
2454 | ||
2455 | /* Note that since we pass the resulting bindings through | |
2456 | get_keymap_1, non-prefix bindings for meta-prefix-char | |
2457 | disappear. */ | |
2458 | next[i] = get_keymap_1 (next[i], 0); | |
2459 | } | |
2460 | else | |
2461 | next[i] = Qnil; | |
2462 | ||
2463 | current = next; | |
2464 | XSET (key, Lisp_Int, XFASTINT (key) & 0177); | |
2465 | } | |
2466 | ||
2467 | first_binding = nmaps; | |
2468 | for (i = nmaps - 1; i >= 0; i--) | |
2469 | { | |
2470 | if (! NILP (current[i])) | |
2471 | { | |
2472 | defs[i] = get_keyelt (access_keymap (current[i], key)); | |
2473 | if (! NILP (defs[i])) | |
2474 | first_binding = i; | |
2475 | } | |
2476 | else | |
2477 | defs[i] = Qnil; | |
2478 | } | |
2479 | ||
2480 | /* When KEY is not defined in any of the keymaps, if it is an upper | |
2481 | case letter and there are bindings for the corresponding | |
2482 | lower-case letter, return the bindings for the lower-case letter. */ | |
2483 | if (first_binding == nmaps | |
2484 | && XTYPE (key) == Lisp_Int | |
2485 | && UPPERCASEP (XINT (key))) | |
2486 | { | |
2487 | XSETINT (key, DOWNCASE (XINT (key))); | |
2488 | ||
2489 | first_binding = nmaps; | |
2490 | for (i = nmaps - 1; i >= 0; i--) | |
2491 | { | |
2492 | if (! NILP (current[i])) | |
2493 | { | |
2494 | defs[i] = get_keyelt (access_keymap (current[i], key)); | |
2495 | if (! NILP (defs[i])) | |
2496 | first_binding = i; | |
2497 | } | |
2498 | else | |
2499 | defs[i] = Qnil; | |
2500 | } | |
2501 | } | |
2502 | ||
2503 | /* Given the set of bindings we've found, produce the next set of maps. */ | |
2504 | for (i = 0; i < nmaps; i++) | |
2505 | next[i] = NILP (defs[i]) ? Qnil : get_keymap_1 (defs[i], 0); | |
2506 | ||
2507 | return first_binding; | |
2508 | } | |
2509 | ||
2510 | /* Read a sequence of keys that ends with a non prefix character | |
2511 | according to the keymaps in KEYMAPS[0..nmaps-1]. Keymaps appearing | |
2512 | earlier in KEYMAPS take precidence over those appearing later. | |
2513 | ||
2514 | Store the sequence in KEYBUF, a buffer of size BUFSIZE. Prompt | |
2515 | with PROMPT. Echo starting immediately unless `prompt' is 0. | |
2516 | Return the length of the key sequence stored. | |
2517 | ||
ff11dfa1 | 2518 | If the user switches frames in the midst of a key sequence, we |
284f4730 JB |
2519 | throw away any prefix we have read so far, and start afresh. For |
2520 | mouse clicks, we look up the click in the keymap of the buffer | |
2521 | clicked on, throwing away any prefix if it is not the same buffer | |
2522 | we used to be reading from. */ | |
2523 | ||
2524 | static int | |
2525 | read_key_sequence (keybuf, bufsize, prompt) | |
2526 | Lisp_Object *keybuf; | |
2527 | int bufsize; | |
2528 | Lisp_Object prompt; | |
2529 | { | |
2530 | /* How many keys there are in the current key sequence. */ | |
2531 | int t; | |
2532 | ||
2533 | /* The buffer that the most recently read event was typed at. This | |
2534 | helps us read mouse clicks according to the buffer clicked in, | |
ff11dfa1 | 2535 | and notice when the mouse has moved from one frame to another. */ |
284f4730 JB |
2536 | struct buffer *last_event_buffer = current_buffer; |
2537 | ||
2538 | /* The length of the echo buffer when we started reading, and | |
2539 | the length of this_command_keys when we started reading. */ | |
2540 | int echo_start; | |
2541 | int keys_start = this_command_key_count; | |
2542 | ||
2543 | /* The number of keymaps we're scanning right now, and the number of | |
2544 | keymaps we have allocated space for. */ | |
2545 | int nmaps; | |
2546 | int nmaps_allocated = 0; | |
2547 | ||
2548 | /* current[0..nmaps-1] are the prefix definitions of KEYBUF[0..t-1] | |
2549 | in the current keymaps, or nil where it is not a prefix. */ | |
2550 | Lisp_Object *current; | |
2551 | ||
2552 | /* defs[0..nmaps-1] are the definitions of KEYBUF[0..t-1] in | |
2553 | the current keymaps. */ | |
2554 | Lisp_Object *defs; | |
2555 | ||
2556 | /* The lowest i such that defs[i] is non-nil. */ | |
2557 | int first_binding; | |
2558 | ||
2559 | /* If mock_input > t, then KEYBUF[t] should be read as the next | |
2560 | input key. */ | |
2561 | int mock_input = 0; | |
2562 | ||
2563 | /* If the sequence is unbound in current[], keymap[fkey_start..fkey_end-1] | |
2564 | is a prefix in Vfunction_key_map, and fkey_map is its binding. | |
2565 | These might be > t, indicating that all function key scanning should | |
2566 | hold off until t reaches them. */ | |
2567 | int fkey_start = 0, fkey_end = 0; | |
2568 | Lisp_Object fkey_map = Vfunction_key_map; | |
2569 | ||
2570 | if (INTERACTIVE) | |
2571 | { | |
2572 | if (prompt) | |
2573 | echo_prompt (prompt); | |
2574 | else if (cursor_in_echo_area) | |
2575 | /* This doesn't put in a dash if the echo buffer is empty, so | |
2576 | you don't always see a dash hanging out in the minibuffer. */ | |
2577 | echo_dash (); | |
2578 | echo_start = echo_length (); | |
2579 | } | |
2580 | ||
2581 | /* If there is no function key map, turn of function key scanning. */ | |
2582 | if (NILP (Fkeymapp (Vfunction_key_map))) | |
2583 | fkey_start = fkey_end = bufsize + 1; | |
2584 | ||
2585 | restart: | |
2586 | t = 0; | |
2587 | this_command_key_count = keys_start; | |
2588 | ||
2589 | { | |
2590 | Lisp_Object *maps; | |
2591 | ||
2592 | nmaps = current_minor_maps (0, &maps) + 2; | |
2593 | if (nmaps > nmaps_allocated) | |
2594 | { | |
2595 | current = (Lisp_Object *) alloca (nmaps * sizeof (current[0])); | |
2596 | defs = (Lisp_Object *) alloca (nmaps * sizeof (defs[0])); | |
2597 | nmaps_allocated = nmaps; | |
2598 | } | |
2599 | bcopy (maps, current, (nmaps - 2) * sizeof (current[0])); | |
2600 | current[nmaps-2] = last_event_buffer->keymap; | |
2601 | current[nmaps-1] = global_map; | |
2602 | } | |
2603 | ||
2604 | /* Find an accurate initial value for first_binding. */ | |
2605 | for (first_binding = 0; first_binding < nmaps; first_binding++) | |
2606 | if (! NILP (current[first_binding])) | |
2607 | break; | |
2608 | ||
2609 | while ((first_binding < nmaps && ! NILP (current[first_binding])) | |
2610 | || (first_binding >= nmaps && fkey_start < t)) | |
2611 | { | |
2612 | Lisp_Object key; | |
2613 | ||
2614 | if (t >= bufsize) | |
2615 | error ("key sequence too long"); | |
2616 | ||
2617 | /* Are we reading keys stuffed into keybuf? */ | |
2618 | if (t < mock_input) | |
2619 | { | |
2620 | key = keybuf[t]; | |
2621 | add_command_key (key); | |
2622 | echo_char (key); | |
2623 | } | |
2624 | /* Otherwise, we should actually read a character. */ | |
2625 | else | |
2626 | { | |
2627 | struct buffer *buf; | |
2628 | ||
2629 | if (!prompt && INTERACTIVE) | |
2630 | key = read_char_menu_prompt (prompt, Qnil, Qnil); | |
2631 | else | |
2632 | key = read_char (!prompt); | |
2633 | ||
2634 | /* The above routines return -1 at the end of a macro. | |
2635 | Emacs 18 handles this by returning immediately with a | |
2636 | zero, so that's what we'll do. */ | |
2637 | if (XTYPE (key) == Lisp_Int && XINT (key) < 0) | |
2638 | return 0; | |
2639 | ||
2640 | Vquit_flag = Qnil; | |
2641 | ||
ff11dfa1 | 2642 | #ifdef MULTI_FRAME |
284f4730 JB |
2643 | /* What buffer was this event typed/moused at? */ |
2644 | if (XTYPE (key) == Lisp_Int || XTYPE (key) == Lisp_Symbol) | |
2645 | buf = (XBUFFER | |
2646 | (XWINDOW | |
ff11dfa1 JB |
2647 | (FRAME_SELECTED_WINDOW |
2648 | (XFRAME (Vlast_event_frame)))->buffer)); | |
284f4730 JB |
2649 | else if (EVENT_HAS_PARAMETERS (key)) |
2650 | { | |
2651 | Lisp_Object window = EVENT_WINDOW (key); | |
2652 | ||
2653 | if (NILP (window)) | |
2654 | abort (); | |
2655 | ||
2656 | buf = XBUFFER (XWINDOW (window)->buffer); | |
2657 | } | |
2658 | else | |
2659 | abort (); | |
2660 | ||
2661 | /* If this event came to a different buffer than the one | |
2662 | we're currently in, switch buffers and start a new key | |
2663 | sequence, starting with key. */ | |
2664 | if (buf != last_event_buffer) | |
2665 | { | |
2666 | last_event_buffer = buf; | |
ff11dfa1 | 2667 | Fselect_frame (Vlast_event_frame, Qnil); |
284f4730 JB |
2668 | |
2669 | /* Arrange to read key as the next event. */ | |
2670 | keybuf[0] = key; | |
2671 | mock_input = 1; | |
2672 | ||
2673 | /* Truncate the key sequence in the echo area. */ | |
2674 | if (INTERACTIVE) | |
2675 | echo_truncate (echo_start); | |
2676 | ||
2677 | goto restart; | |
2678 | } | |
e5d77022 | 2679 | #endif |
284f4730 JB |
2680 | } |
2681 | ||
2682 | first_binding = (follow_key (key, | |
2683 | nmaps - first_binding, | |
2684 | current + first_binding, | |
2685 | defs + first_binding, | |
2686 | current + first_binding) | |
2687 | + first_binding); | |
2688 | keybuf[t++] = key; | |
2689 | ||
2690 | /* If the sequence is unbound, see if we can hang a function key | |
2691 | off the end of it. Don't reread the expansion of a function key. */ | |
2692 | if (first_binding >= nmaps | |
2693 | && t > mock_input) | |
2694 | { | |
2695 | Lisp_Object fkey_next; | |
2696 | ||
2697 | /* Scan from fkey_end until we find a bound suffix. */ | |
2698 | while (fkey_end < t) | |
2699 | { | |
2700 | fkey_next = | |
2701 | get_keyelt (access_keymap (fkey_map, keybuf[fkey_end++])); | |
284f4730 | 2702 | /* If keybuf[fkey_start..fkey_next] is bound in the |
a764a753 JB |
2703 | function key map and it's a suffix of the current |
2704 | sequence (i.e. fkey_next == t), replace it with | |
2705 | the binding and restart with fkey_start at the end. */ | |
284f4730 JB |
2706 | if (XTYPE (fkey_next) == Lisp_Vector |
2707 | && fkey_end == t) | |
2708 | { | |
2709 | t = fkey_start + XVECTOR (fkey_next)->size; | |
2710 | if (t >= bufsize) | |
2711 | error ("key sequence too long"); | |
2712 | ||
2713 | bcopy (XVECTOR (fkey_next)->contents, | |
2714 | keybuf + fkey_start, | |
2715 | (t - fkey_start) * sizeof (keybuf[0])); | |
2716 | ||
2717 | mock_input = t; | |
2718 | fkey_start = fkey_end = t; | |
2719 | ||
2720 | /* Truncate the key sequence in the echo area. */ | |
2721 | if (INTERACTIVE) | |
2722 | echo_truncate (echo_start); | |
2723 | ||
2724 | goto restart; | |
2725 | } | |
2726 | ||
2727 | fkey_map = get_keymap_1 (fkey_next, 0); | |
2728 | ||
a764a753 JB |
2729 | /* If we no longer have a bound suffix, try a new positions for |
2730 | fkey_start. */ | |
284f4730 JB |
2731 | if (NILP (fkey_map)) |
2732 | { | |
2733 | fkey_end = ++fkey_start; | |
2734 | fkey_map = Vfunction_key_map; | |
2735 | } | |
2736 | } | |
2737 | } | |
2738 | } | |
2739 | ||
2740 | read_key_sequence_cmd = (first_binding < nmaps | |
2741 | ? defs[first_binding] | |
2742 | : Qnil); | |
2743 | ||
2744 | return t; | |
2745 | } | |
2746 | ||
c0a58692 | 2747 | DEFUN ("read-key-sequence", Fread_key_sequence, Sread_key_sequence, 1, 2, 0, |
284f4730 JB |
2748 | "Read a sequence of keystrokes and return as a string or vector.\n\ |
2749 | The sequence is sufficient to specify a non-prefix command in the\n\ | |
2750 | current local and global maps.\n\ | |
2751 | \n\ | |
c0a58692 RS |
2752 | First arg PROMPT is a prompt string. If nil, do not prompt specially.\n\ |
2753 | Second (optional) arg CONTINUE-ECHO, if non-nil, means this key echos\n\ | |
2754 | as a continuation of the previous key.\n\ | |
284f4730 | 2755 | \n\ |
ff11dfa1 | 2756 | If Emacs is running on multiple frames, switching between frames in\n\ |
284f4730 JB |
2757 | the midst of a keystroke will toss any prefix typed so far. A C-g\n\ |
2758 | typed while in this function is treated like any other character, and\n\ | |
2759 | `quit-flag' is not set.") | |
c0a58692 RS |
2760 | (prompt, continue_echo) |
2761 | Lisp_Object prompt, continue_echo; | |
284f4730 JB |
2762 | { |
2763 | Lisp_Object keybuf[30]; | |
2764 | register int i; | |
2765 | struct gcpro gcpro1, gcpro2; | |
2766 | ||
2767 | if (!NILP (prompt)) | |
2768 | CHECK_STRING (prompt, 0); | |
2769 | QUIT; | |
2770 | ||
2771 | bzero (keybuf, sizeof keybuf); | |
2772 | GCPRO1 (keybuf[0]); | |
2773 | gcpro1.nvars = (sizeof keybuf/sizeof (keybuf[0])); | |
2774 | ||
daa37602 | 2775 | if (NILP (continue_echo)) |
c0a58692 RS |
2776 | this_command_key_count = 0; |
2777 | ||
284f4730 JB |
2778 | i = read_key_sequence (keybuf, (sizeof keybuf/sizeof (keybuf[0])), |
2779 | NILP (prompt) ? 0 : XSTRING (prompt)->data); | |
2780 | ||
2781 | UNGCPRO; | |
2782 | return make_array (i, keybuf); | |
2783 | } | |
2784 | \f | |
2785 | DEFUN ("command-execute", Fcommand_execute, Scommand_execute, 1, 2, 0, | |
2786 | "Execute CMD as an editor command.\n\ | |
2787 | CMD must be a symbol that satisfies the `commandp' predicate.\n\ | |
2788 | Optional second arg RECORD-FLAG non-nil\n\ | |
2789 | means unconditionally put this command in `command-history'.\n\ | |
2790 | Otherwise, that is done only if an arg is read using the minibuffer.") | |
2791 | (cmd, record) | |
2792 | Lisp_Object cmd, record; | |
2793 | { | |
2794 | register Lisp_Object final; | |
2795 | register Lisp_Object tem; | |
2796 | Lisp_Object prefixarg; | |
2797 | struct backtrace backtrace; | |
2798 | extern int debug_on_next_call; | |
2799 | ||
2800 | prefixarg = Vprefix_arg, Vprefix_arg = Qnil; | |
2801 | Vcurrent_prefix_arg = prefixarg; | |
2802 | debug_on_next_call = 0; | |
2803 | ||
2804 | if (XTYPE (cmd) == Lisp_Symbol) | |
2805 | { | |
2806 | tem = Fget (cmd, Qdisabled); | |
2807 | if (!NILP (tem)) | |
2808 | return call1 (Vrun_hooks, Vdisabled_command_hook); | |
2809 | } | |
2810 | ||
2811 | while (1) | |
2812 | { | |
ffd56f97 | 2813 | final = Findirect_function (cmd); |
284f4730 JB |
2814 | |
2815 | if (CONSP (final) && (tem = Fcar (final), EQ (tem, Qautoload))) | |
2816 | do_autoload (final, cmd); | |
2817 | else | |
2818 | break; | |
2819 | } | |
2820 | ||
2821 | if (XTYPE (final) == Lisp_String | |
2822 | || XTYPE (final) == Lisp_Vector) | |
2823 | { | |
2824 | /* If requested, place the macro in the command history. For | |
2825 | other sorts of commands, call-interactively takes care of | |
2826 | this. */ | |
2827 | if (!NILP (record)) | |
2828 | Vcommand_history | |
2829 | = Fcons (Fcons (Qexecute_kbd_macro, | |
2830 | Fcons (final, Fcons (prefixarg, Qnil))), | |
2831 | Vcommand_history); | |
2832 | ||
2833 | return Fexecute_kbd_macro (final, prefixarg); | |
2834 | } | |
2835 | if (CONSP (final) || XTYPE (final) == Lisp_Subr | |
2836 | || XTYPE (final) == Lisp_Compiled) | |
2837 | { | |
2838 | backtrace.next = backtrace_list; | |
2839 | backtrace_list = &backtrace; | |
2840 | backtrace.function = &Qcall_interactively; | |
2841 | backtrace.args = &cmd; | |
2842 | backtrace.nargs = 1; | |
2843 | backtrace.evalargs = 0; | |
2844 | ||
2845 | tem = Fcall_interactively (cmd, record); | |
2846 | ||
2847 | backtrace_list = backtrace.next; | |
2848 | return tem; | |
2849 | } | |
2850 | return Qnil; | |
2851 | } | |
2852 | \f | |
2853 | #if 0 | |
2854 | DEFUN ("execute-mouse-event", Fexecute_mouse_event, Sexecute_mouse_event, | |
2855 | 1, 1, 0, | |
2856 | "Execute the definition of the mouse-click event EVENT.\n\ | |
2857 | The handler function is found by looking the event's key sequence up\n\ | |
2858 | in the buffer's local mouse map and in `global-mouse-map'.\n\ | |
2859 | \n\ | |
2860 | After running the handler, call the value of `mouse-event-function'\n\ | |
2861 | with EVENT as arg.") | |
2862 | (event) | |
2863 | Lisp_Object event; | |
2864 | { | |
2865 | Lisp_Object tem; | |
2866 | Lisp_Object mouse_cmd; | |
ff11dfa1 | 2867 | Lisp_Object keyseq, window, frame_part, pos, time; |
284f4730 JB |
2868 | |
2869 | #ifndef HAVE_X11 | |
2870 | Vmouse_event = event; | |
2871 | #endif | |
2872 | ||
2873 | if (EQ (event, Qnil)) | |
2874 | { | |
2875 | bitch_at_user (); | |
2876 | return Qnil; | |
2877 | } | |
2878 | ||
2879 | CHECK_CONS (event, 0); | |
2880 | pos = Fcar (event); | |
2881 | window = Fcar (Fcdr (event)); | |
ff11dfa1 | 2882 | frame_part = Fcar (Fcdr (Fcdr (event))); |
284f4730 JB |
2883 | keyseq = Fcar (Fcdr (Fcdr (Fcdr (event)))); |
2884 | time = Fcar (Fcdr (Fcdr (Fcdr (Fcdr (event))))); | |
2885 | CHECK_STRING (keyseq, 0); | |
2886 | CHECK_WINDOW (window, 0); | |
2887 | ||
2888 | /* Look up KEYSEQ in the buffer's local mouse map, then in global one. */ | |
2889 | ||
2890 | mouse_cmd = Qnil; | |
2891 | ||
2892 | if (!NILP (XWINDOW (window)->buffer)) | |
2893 | { | |
2894 | Lisp_Object local_map; | |
2895 | ||
2896 | local_map = XBUFFER (XWINDOW (window)->buffer)->mouse_map; | |
2897 | tem = Fkeymapp (local_map); | |
2898 | if (!NILP (tem)) | |
2899 | mouse_cmd = Flookup_key (local_map, keyseq); | |
2900 | /* A number as value means the key is too long; treat as undefined. */ | |
2901 | if (XTYPE (mouse_cmd) == Lisp_Int) | |
2902 | mouse_cmd = Qnil; | |
2903 | } | |
2904 | ||
2905 | tem = Fkeymapp (Vglobal_mouse_map); | |
2906 | if (NILP (mouse_cmd) && !NILP (tem)) | |
2907 | mouse_cmd = Flookup_key (Vglobal_mouse_map, keyseq); | |
2908 | if (XTYPE (mouse_cmd) == Lisp_Int) | |
2909 | mouse_cmd = Qnil; | |
2910 | ||
2911 | if (NILP (mouse_cmd)) | |
2912 | { | |
2913 | /* This button/shift combination is not defined. | |
2914 | If it is a button-down event, ring the bell. */ | |
2915 | #ifdef HAVE_X11 | |
2916 | if (XSTRING (keyseq)->data[XSTRING (keyseq)->size - 1] & 0x18 == 0) | |
2917 | #else | |
2918 | if (XSTRING (keyseq)->data[XSTRING (keyseq)->size - 1] & 4 == 0) | |
2919 | #endif | |
2920 | bitch_at_user (); | |
2921 | } | |
2922 | else | |
2923 | { | |
ff11dfa1 | 2924 | FRAME_PTR f = XFRAME (WINDOW_FRAME (XWINDOW (window))); |
284f4730 JB |
2925 | |
2926 | #ifndef HAVE_X11 | |
ff11dfa1 | 2927 | Vmouse_window = f->selected_window; |
284f4730 JB |
2928 | #endif /* HAVE_X11 */ |
2929 | /* It's defined; call the definition. */ | |
2930 | Vprefix_arg = Qnil; | |
ff11dfa1 | 2931 | if (!NILP (frame_part)) |
284f4730 JB |
2932 | { |
2933 | /* For a scroll-bar click, set the prefix arg | |
2934 | to the number of lines down from the top the click was. | |
2935 | Many scroll commands want to scroll by this many lines. */ | |
2936 | Lisp_Object position; | |
2937 | Lisp_Object length; | |
2938 | Lisp_Object offset; | |
2939 | ||
2940 | position = Fcar (pos); | |
2941 | length = Fcar (Fcdr (pos)); | |
2942 | offset = Fcar (Fcdr (Fcdr (pos))); | |
2943 | ||
2944 | if (XINT (length) != 0) | |
2945 | XSET (Vprefix_arg, Lisp_Int, | |
ff11dfa1 | 2946 | (FRAME_HEIGHT (f) * (XINT (position) + XINT (offset)) |
284f4730 JB |
2947 | / (XINT (length) + 2 * XINT (offset)))); |
2948 | } | |
2949 | Fcommand_execute (mouse_cmd, Qnil); | |
2950 | } | |
2951 | ||
2952 | if (!NILP (Vmouse_event_function)) /* Not `event' so no need for GCPRO */ | |
2953 | call1 (Vmouse_event_function, Vmouse_event); | |
2954 | return Qnil; | |
2955 | } | |
2956 | #endif | |
2957 | \f | |
2958 | DEFUN ("execute-extended-command", Fexecute_extended_command, Sexecute_extended_command, | |
2959 | 1, 1, "P", | |
2960 | "Read function name, then read its arguments and call it.") | |
2961 | (prefixarg) | |
2962 | Lisp_Object prefixarg; | |
2963 | { | |
2964 | Lisp_Object function; | |
2965 | char buf[40]; | |
2966 | Lisp_Object saved_keys; | |
2967 | struct gcpro gcpro1; | |
2968 | ||
2969 | saved_keys = Fthis_command_keys (); | |
2970 | buf[0] = 0; | |
2971 | GCPRO1 (saved_keys); | |
2972 | ||
2973 | if (EQ (prefixarg, Qminus)) | |
2974 | strcpy (buf, "- "); | |
2975 | else if (CONSP (prefixarg) && XINT (XCONS (prefixarg)->car) == 4) | |
2976 | strcpy (buf, "C-u "); | |
2977 | else if (CONSP (prefixarg) && XTYPE (XCONS (prefixarg)->car) == Lisp_Int) | |
2978 | sprintf (buf, "%d ", XINT (XCONS (prefixarg)->car)); | |
2979 | else if (XTYPE (prefixarg) == Lisp_Int) | |
2980 | sprintf (buf, "%d ", XINT (prefixarg)); | |
2981 | ||
2982 | /* This isn't strictly correct if execute-extended-command | |
2983 | is bound to anything else. Perhaps it should use | |
2984 | this_command_keys? */ | |
2985 | strcat (buf, "M-x "); | |
2986 | ||
2987 | /* Prompt with buf, and then read a string, completing from and | |
2988 | restricting to the set of all defined commands. Don't provide | |
2989 | any initial input. The last Qnil says not to perform a | |
2990 | peculiar hack on the initial input. */ | |
2991 | function = Fcompleting_read (build_string (buf), | |
2992 | Vobarray, Qcommandp, | |
2993 | Qt, Qnil, Qnil); | |
2994 | ||
1113d9db JB |
2995 | /* Set this_command_keys to the concatenation of saved_keys and |
2996 | function, followed by a RET. */ | |
284f4730 | 2997 | { |
1113d9db | 2998 | struct Lisp_String *str; |
284f4730 JB |
2999 | int i; |
3000 | Lisp_Object tem; | |
3001 | ||
1113d9db JB |
3002 | this_command_key_count = 0; |
3003 | ||
3004 | str = XSTRING (saved_keys); | |
3005 | for (i = 0; i < str->size; i++) | |
284f4730 | 3006 | { |
1113d9db | 3007 | XFASTINT (tem) = str->data[i]; |
284f4730 JB |
3008 | add_command_key (tem); |
3009 | } | |
1113d9db JB |
3010 | |
3011 | str = XSTRING (function); | |
3012 | for (i = 0; i < str->size; i++) | |
3013 | { | |
3014 | XFASTINT (tem) = str->data[i]; | |
3015 | add_command_key (tem); | |
3016 | } | |
3017 | ||
3018 | XFASTINT (tem) = '\015'; | |
3019 | add_command_key (tem); | |
284f4730 JB |
3020 | } |
3021 | ||
3022 | UNGCPRO; | |
3023 | ||
3024 | function = Fintern (function, Vobarray); | |
3025 | Vprefix_arg = prefixarg; | |
3026 | this_command = function; | |
3027 | ||
3028 | return Fcommand_execute (function, Qt); | |
3029 | } | |
3030 | \f | |
3031 | ||
3032 | detect_input_pending () | |
3033 | { | |
3034 | if (!input_pending) | |
3035 | get_input_pending (&input_pending); | |
3036 | ||
3037 | return input_pending; | |
3038 | } | |
3039 | ||
ffd56f97 JB |
3040 | /* This is called in some cases before a possible quit. |
3041 | It cases the next call to detect_input_pending to recompute input_pending. | |
3042 | So calling this function unnecessarily can't do any harm. */ | |
3043 | clear_input_pending () | |
3044 | { | |
3045 | input_pending = 0; | |
3046 | } | |
3047 | ||
284f4730 JB |
3048 | DEFUN ("input-pending-p", Finput_pending_p, Sinput_pending_p, 0, 0, 0, |
3049 | "T if command input is currently available with no waiting.\n\ | |
3050 | Actually, the value is nil only if we can be sure that no input is available.") | |
3051 | () | |
3052 | { | |
3053 | if (!NILP (unread_command_char)) | |
3054 | return (Qt); | |
3055 | ||
3056 | return detect_input_pending () ? Qt : Qnil; | |
3057 | } | |
3058 | ||
3059 | DEFUN ("recent-keys", Frecent_keys, Srecent_keys, 0, 0, 0, | |
daa37602 | 3060 | "Return vector of last 100 chars read from terminal.") |
284f4730 JB |
3061 | () |
3062 | { | |
3063 | Lisp_Object val; | |
3064 | ||
3065 | if (total_keys < NUM_RECENT_KEYS) | |
3066 | return Fvector (total_keys, recent_keys); | |
3067 | else | |
3068 | { | |
3069 | val = Fvector (NUM_RECENT_KEYS, recent_keys); | |
3070 | bcopy (recent_keys + recent_keys_index, | |
3071 | XVECTOR (val)->contents, | |
3072 | (NUM_RECENT_KEYS - recent_keys_index) * sizeof (Lisp_Object)); | |
3073 | bcopy (recent_keys, | |
3074 | XVECTOR (val)->contents + NUM_RECENT_KEYS - recent_keys_index, | |
3075 | recent_keys_index * sizeof (Lisp_Object)); | |
3076 | return val; | |
3077 | } | |
3078 | } | |
3079 | ||
3080 | DEFUN ("this-command-keys", Fthis_command_keys, Sthis_command_keys, 0, 0, 0, | |
3081 | "Return string of the keystrokes that invoked this command.") | |
3082 | () | |
3083 | { | |
3084 | return make_array (this_command_key_count, this_command_keys); | |
3085 | } | |
3086 | ||
3087 | DEFUN ("recursion-depth", Frecursion_depth, Srecursion_depth, 0, 0, 0, | |
3088 | "Return the current depth in recursive edits.") | |
3089 | () | |
3090 | { | |
3091 | Lisp_Object temp; | |
3092 | XFASTINT (temp) = command_loop_level + minibuf_level; | |
3093 | return temp; | |
3094 | } | |
3095 | ||
3096 | DEFUN ("open-dribble-file", Fopen_dribble_file, Sopen_dribble_file, 1, 1, | |
3097 | "FOpen dribble file: ", | |
3098 | "Start writing all keyboard characters to FILE.") | |
3099 | (file) | |
3100 | Lisp_Object file; | |
3101 | { | |
3102 | if (NILP (file)) | |
3103 | { | |
3104 | fclose (dribble); | |
3105 | dribble = 0; | |
3106 | } | |
3107 | else | |
3108 | { | |
3109 | file = Fexpand_file_name (file, Qnil); | |
3110 | dribble = fopen (XSTRING (file)->data, "w"); | |
3111 | } | |
3112 | return Qnil; | |
3113 | } | |
3114 | ||
3115 | DEFUN ("discard-input", Fdiscard_input, Sdiscard_input, 0, 0, 0, | |
3116 | "Discard the contents of the terminal input buffer.\n\ | |
3117 | Also cancel any kbd macro being defined.") | |
3118 | () | |
3119 | { | |
3120 | defining_kbd_macro = 0; | |
3121 | update_mode_lines++; | |
3122 | ||
3123 | #if 0 | |
3124 | unread_command_char = make_number (-1); | |
3125 | #endif | |
3126 | unread_command_char = Qnil; | |
3127 | ||
3128 | discard_tty_input (); | |
3129 | ||
3130 | kbd_fetch_ptr = kbd_store_ptr; | |
3131 | input_pending = 0; | |
3132 | ||
3133 | return Qnil; | |
3134 | } | |
3135 | \f | |
3136 | DEFUN ("suspend-emacs", Fsuspend_emacs, Ssuspend_emacs, 0, 1, "", | |
3137 | "Stop Emacs and return to superior process. You can resume later.\n\ | |
3138 | On systems that don't have job control, run a subshell instead.\n\n\ | |
3139 | If optional arg STUFFSTRING is non-nil, its characters are stuffed\n\ | |
3140 | to be read as terminal input by Emacs's superior shell.\n\ | |
3141 | Before suspending, if `suspend-hook' is bound and value is non-nil\n\ | |
3142 | call the value as a function of no args. Don't suspend if it returns non-nil.\n\ | |
3143 | Otherwise, suspend normally and after resumption call\n\ | |
3144 | `suspend-resume-hook' if that is bound and non-nil.\n\ | |
3145 | \n\ | |
3146 | Some operating systems cannot stop the Emacs process and resume it later.\n\ | |
3147 | On such systems, Emacs will start a subshell and wait for it to exit.") | |
3148 | (stuffstring) | |
3149 | Lisp_Object stuffstring; | |
3150 | { | |
3151 | register Lisp_Object tem; | |
3152 | int count = specpdl_ptr - specpdl; | |
3153 | int old_height, old_width; | |
3154 | int width, height; | |
3155 | struct gcpro gcpro1; | |
3156 | extern init_sys_modes (); | |
3157 | ||
3158 | if (!NILP (stuffstring)) | |
3159 | CHECK_STRING (stuffstring, 0); | |
3160 | GCPRO1 (stuffstring); | |
3161 | ||
3162 | /* Call value of suspend-hook | |
3163 | if it is bound and value is non-nil. */ | |
3164 | if (!NILP (Vrun_hooks)) | |
3165 | { | |
3166 | tem = call1 (Vrun_hooks, intern ("suspend-hook")); | |
3167 | if (!EQ (tem, Qnil)) return Qnil; | |
3168 | } | |
3169 | ||
ff11dfa1 | 3170 | get_frame_size (&old_width, &old_height); |
284f4730 JB |
3171 | reset_sys_modes (); |
3172 | /* sys_suspend can get an error if it tries to fork a subshell | |
3173 | and the system resources aren't available for that. */ | |
3174 | record_unwind_protect (init_sys_modes, 0); | |
3175 | stuff_buffered_input (stuffstring); | |
3176 | sys_suspend (); | |
3177 | unbind_to (count, Qnil); | |
3178 | ||
3179 | /* Check if terminal/window size has changed. | |
3180 | Note that this is not useful when we are running directly | |
3181 | with a window system; but suspend should be disabled in that case. */ | |
ff11dfa1 | 3182 | get_frame_size (&width, &height); |
284f4730 | 3183 | if (width != old_width || height != old_height) |
ff11dfa1 | 3184 | change_frame_size (height, width, 0); |
284f4730 JB |
3185 | |
3186 | /* Call value of suspend-resume-hook | |
3187 | if it is bound and value is non-nil. */ | |
3188 | if (!NILP (Vrun_hooks)) | |
3189 | call1 (Vrun_hooks, intern ("suspend-resume-hook")); | |
3190 | ||
3191 | UNGCPRO; | |
3192 | return Qnil; | |
3193 | } | |
3194 | ||
3195 | /* If STUFFSTRING is a string, stuff its contents as pending terminal input. | |
3196 | Then in any case stuff anthing Emacs has read ahead and not used. */ | |
3197 | ||
3198 | stuff_buffered_input (stuffstring) | |
3199 | Lisp_Object stuffstring; | |
3200 | { | |
3201 | register unsigned char *p; | |
3202 | ||
3203 | /* stuff_char works only in BSD, versions 4.2 and up. */ | |
3204 | #ifdef BSD | |
3205 | #ifndef BSD4_1 | |
3206 | if (XTYPE (stuffstring) == Lisp_String) | |
3207 | { | |
3208 | register int count; | |
3209 | ||
3210 | p = XSTRING (stuffstring)->data; | |
3211 | count = XSTRING (stuffstring)->size; | |
3212 | while (count-- > 0) | |
3213 | stuff_char (*p++); | |
3214 | stuff_char ('\n'); | |
3215 | } | |
3216 | /* Anything we have read ahead, put back for the shell to read. */ | |
3217 | while (kbd_fetch_ptr != kbd_store_ptr) | |
3218 | { | |
3219 | if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE) | |
3220 | kbd_fetch_ptr = kbd_buffer; | |
3221 | if (kbd_fetch_ptr->kind == ascii_keystroke) | |
3222 | stuff_char (XINT (kbd_fetch_ptr->code)); | |
3223 | kbd_fetch_ptr++; | |
3224 | } | |
3225 | input_pending = 0; | |
3226 | #endif | |
3227 | #endif /* BSD and not BSD4_1 */ | |
3228 | } | |
3229 | \f | |
ffd56f97 JB |
3230 | set_waiting_for_input (time_to_clear) |
3231 | EMACS_TIME *time_to_clear; | |
284f4730 | 3232 | { |
ffd56f97 | 3233 | input_available_clear_time = time_to_clear; |
284f4730 JB |
3234 | |
3235 | /* Tell interrupt_signal to throw back to read_char, */ | |
3236 | waiting_for_input = 1; | |
3237 | ||
3238 | /* If interrupt_signal was called before and buffered a C-g, | |
3239 | make it run again now, to avoid timing error. */ | |
3240 | if (!NILP (Vquit_flag)) | |
3241 | quit_throw_to_read_char (); | |
3242 | ||
3243 | /* If alarm has gone off already, echo now. */ | |
3244 | if (echo_flag) | |
3245 | { | |
3246 | echo (); | |
3247 | echo_flag = 0; | |
3248 | } | |
3249 | } | |
3250 | ||
3251 | clear_waiting_for_input () | |
3252 | { | |
3253 | /* Tell interrupt_signal not to throw back to read_char, */ | |
3254 | waiting_for_input = 0; | |
ffd56f97 | 3255 | input_available_clear_time = 0; |
284f4730 JB |
3256 | } |
3257 | ||
3258 | /* This routine is called at interrupt level in response to C-G. | |
3259 | If interrupt_input, this is the handler for SIGINT. | |
3260 | Otherwise, it is called from kbd_buffer_store_event, | |
3261 | in handling SIGIO or SIGTINT. | |
3262 | ||
3263 | If `waiting_for_input' is non zero, then unless `echoing' is nonzero, | |
3264 | immediately throw back to read_char. | |
3265 | ||
3266 | Otherwise it sets the Lisp variable quit-flag not-nil. | |
3267 | This causes eval to throw, when it gets a chance. | |
3268 | If quit-flag is already non-nil, it stops the job right away. */ | |
3269 | ||
3270 | SIGTYPE | |
3271 | interrupt_signal () | |
3272 | { | |
3273 | char c; | |
3274 | /* Must preserve main program's value of errno. */ | |
3275 | int old_errno = errno; | |
3276 | extern Lisp_Object Vwindow_system; | |
3277 | ||
3278 | #ifdef USG | |
3279 | /* USG systems forget handlers when they are used; | |
3280 | must reestablish each time */ | |
3281 | signal (SIGINT, interrupt_signal); | |
3282 | signal (SIGQUIT, interrupt_signal); | |
3283 | #endif /* USG */ | |
3284 | ||
3285 | cancel_echoing (); | |
3286 | ||
ff11dfa1 | 3287 | if (!NILP (Vquit_flag) && FRAME_IS_TERMCAP (selected_frame)) |
284f4730 JB |
3288 | { |
3289 | fflush (stdout); | |
3290 | reset_sys_modes (); | |
3291 | sigfree (); | |
3292 | #ifdef SIGTSTP /* Support possible in later USG versions */ | |
3293 | /* | |
3294 | * On systems which can suspend the current process and return to the original | |
3295 | * shell, this command causes the user to end up back at the shell. | |
3296 | * The "Auto-save" and "Abort" questions are not asked until | |
3297 | * the user elects to return to emacs, at which point he can save the current | |
3298 | * job and either dump core or continue. | |
3299 | */ | |
3300 | sys_suspend (); | |
3301 | #else | |
3302 | #ifdef VMS | |
3303 | if (sys_suspend () == -1) | |
3304 | { | |
3305 | printf ("Not running as a subprocess;\n"); | |
3306 | printf ("you can continue or abort.\n"); | |
3307 | } | |
3308 | #else /* not VMS */ | |
3309 | /* Perhaps should really fork an inferior shell? | |
3310 | But that would not provide any way to get back | |
3311 | to the original shell, ever. */ | |
3312 | printf ("No support for stopping a process on this operating system;\n"); | |
3313 | printf ("you can continue or abort.\n"); | |
3314 | #endif /* not VMS */ | |
3315 | #endif /* not SIGTSTP */ | |
3316 | printf ("Auto-save? (y or n) "); | |
3317 | fflush (stdout); | |
3318 | if (((c = getchar ()) & ~040) == 'Y') | |
3319 | Fdo_auto_save (Qnil, Qnil); | |
3320 | while (c != '\n') c = getchar (); | |
3321 | #ifdef VMS | |
3322 | printf ("Abort (and enter debugger)? (y or n) "); | |
3323 | #else /* not VMS */ | |
3324 | printf ("Abort (and dump core)? (y or n) "); | |
3325 | #endif /* not VMS */ | |
3326 | fflush (stdout); | |
3327 | if (((c = getchar ()) & ~040) == 'Y') | |
3328 | abort (); | |
3329 | while (c != '\n') c = getchar (); | |
3330 | printf ("Continuing...\n"); | |
3331 | fflush (stdout); | |
3332 | init_sys_modes (); | |
3333 | } | |
3334 | else | |
3335 | { | |
3336 | /* If executing a function that wants to be interrupted out of | |
3337 | and the user has not deferred quitting by binding `inhibit-quit' | |
3338 | then quit right away. */ | |
3339 | if (immediate_quit && NILP (Vinhibit_quit)) | |
3340 | { | |
3341 | immediate_quit = 0; | |
3342 | sigfree (); | |
3343 | Fsignal (Qquit, Qnil); | |
3344 | } | |
3345 | else | |
3346 | /* Else request quit when it's safe */ | |
3347 | Vquit_flag = Qt; | |
3348 | } | |
3349 | ||
3350 | if (waiting_for_input && !echoing) | |
3351 | quit_throw_to_read_char (); | |
3352 | ||
3353 | errno = old_errno; | |
3354 | } | |
3355 | ||
3356 | /* Handle a C-g by making read_char return C-g. */ | |
3357 | ||
3358 | quit_throw_to_read_char () | |
3359 | { | |
3360 | quit_error_check (); | |
3361 | sigfree (); | |
3362 | /* Prevent another signal from doing this before we finish. */ | |
f76475ad | 3363 | clear_waiting_for_input (); |
284f4730 JB |
3364 | input_pending = 0; |
3365 | ||
3366 | #if 0 | |
3367 | unread_command_char = make_number (-1); | |
3368 | #endif | |
3369 | unread_command_char = Qnil; | |
3370 | ||
3371 | _longjmp (getcjmp, 1); | |
3372 | } | |
3373 | \f | |
3374 | DEFUN ("set-input-mode", Fset_input_mode, Sset_input_mode, 3, 4, 0, | |
3375 | "Set mode of reading keyboard input.\n\ | |
464f8898 RS |
3376 | First arg INTERRUPT non-nil means use input interrupts;\n\ |
3377 | nil means use CBREAK mode.\n\ | |
3378 | Second arg FLOW non-nil means use ^S/^Q flow control for output to terminal\n\ | |
284f4730 | 3379 | (no effect except in CBREAK mode).\n\ |
464f8898 | 3380 | Third arg META non-nil means accept 8-bit input (for a Meta key).\n\ |
284f4730 | 3381 | Otherwise, the top bit is ignored, on the assumption it is parity.\n\ |
464f8898 | 3382 | Optional fourth arg QUIT if non-nil specifies character to use for quitting.") |
284f4730 JB |
3383 | (interrupt, flow, meta, quit) |
3384 | Lisp_Object interrupt, flow, meta, quit; | |
3385 | { | |
3386 | if (!NILP (quit) | |
3387 | && (XTYPE (quit) != Lisp_Int | |
3388 | || XINT (quit) < 0 || XINT (quit) > 0400)) | |
3389 | error ("set-input-mode: QUIT must be an ASCII character."); | |
3390 | ||
3391 | reset_sys_modes (); | |
3392 | #ifdef SIGIO | |
3393 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
3394 | #ifdef NO_SOCK_SIGIO | |
3395 | if (read_socket_hook) | |
3396 | interrupt_input = 0; /* No interrupts if reading from a socket. */ | |
3397 | else | |
3398 | #endif /* NO_SOCK_SIGIO */ | |
3399 | interrupt_input = !NILP (interrupt); | |
3400 | #else /* not SIGIO */ | |
3401 | interrupt_input = 0; | |
3402 | #endif /* not SIGIO */ | |
3403 | /* Our VMS input only works by interrupts, as of now. */ | |
3404 | #ifdef VMS | |
3405 | interrupt_input = 1; | |
3406 | #endif | |
3407 | flow_control = !NILP (flow); | |
3408 | meta_key = !NILP (meta); | |
3409 | if (!NILP (quit)) | |
3410 | /* Don't let this value be out of range. */ | |
3411 | quit_char = XINT (quit) & (meta_key ? 0377 : 0177); | |
3412 | ||
3413 | init_sys_modes (); | |
3414 | return Qnil; | |
3415 | } | |
3416 | \f | |
3417 | init_keyboard () | |
3418 | { | |
3419 | this_command_keys_size = 40; | |
3420 | this_command_keys = | |
3421 | (Lisp_Object *) xmalloc (this_command_keys_size * sizeof (Lisp_Object)); | |
3422 | ||
3423 | /* This is correct before outermost invocation of the editor loop */ | |
3424 | command_loop_level = -1; | |
3425 | immediate_quit = 0; | |
3426 | quit_char = Ctl ('g'); | |
3427 | unread_command_char = Qnil; | |
3428 | recent_keys_index = 0; | |
3429 | total_keys = 0; | |
3430 | kbd_fetch_ptr = kbd_buffer; | |
3431 | kbd_store_ptr = kbd_buffer; | |
3432 | do_mouse_tracking = 0; | |
3433 | input_pending = 0; | |
3434 | ||
3435 | if (!noninteractive) | |
3436 | { | |
3437 | signal (SIGINT, interrupt_signal); | |
3438 | #ifdef HAVE_TERMIO | |
3439 | /* For systems with SysV TERMIO, C-g is set up for both SIGINT and | |
3440 | SIGQUIT and we can't tell which one it will give us. */ | |
3441 | signal (SIGQUIT, interrupt_signal); | |
3442 | #endif /* HAVE_TERMIO */ | |
3443 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
3444 | #ifdef SIGIO | |
3445 | signal (SIGIO, input_available_signal); | |
3446 | #endif SIGIO | |
3447 | } | |
3448 | ||
3449 | /* Use interrupt input by default, if it works and noninterrupt input | |
3450 | has deficiencies. */ | |
3451 | ||
3452 | #ifdef INTERRUPT_INPUT | |
3453 | interrupt_input = 1; | |
3454 | #else | |
3455 | interrupt_input = 0; | |
3456 | #endif | |
3457 | ||
3458 | /* Our VMS input only works by interrupts, as of now. */ | |
3459 | #ifdef VMS | |
3460 | interrupt_input = 1; | |
3461 | #endif | |
3462 | ||
3463 | sigfree (); | |
3464 | dribble = 0; | |
3465 | ||
3466 | if (keyboard_init_hook) | |
3467 | (*keyboard_init_hook) (); | |
3468 | ||
3469 | #ifdef POLL_FOR_INPUT | |
3470 | poll_suppress_count = 1; | |
3471 | start_polling (); | |
3472 | #endif | |
3473 | } | |
3474 | ||
3475 | /* This type's only use is in syms_of_keyboard, to initialize the | |
3476 | event header symbols and put properties on them. */ | |
3477 | struct event_head { | |
3478 | Lisp_Object *var; | |
3479 | char *name; | |
3480 | Lisp_Object *kind; | |
3481 | }; | |
3482 | ||
3483 | struct event_head head_table[] = { | |
3484 | &Qmouse_movement, "mouse-movement", &Qmouse_movement, | |
3485 | &Qvscrollbar_part, "vscrollbar-part", &Qscrollbar_click, | |
3486 | &Qvslider_part, "vslider-part", &Qscrollbar_click, | |
3487 | &Qvthumbup_part, "vthumbup-part", &Qscrollbar_click, | |
3488 | &Qvthumbdown_part, "vthumbdown-part", &Qscrollbar_click, | |
3489 | &Qhscrollbar_part, "hscrollbar-part", &Qscrollbar_click, | |
3490 | &Qhslider_part, "hslider-part", &Qscrollbar_click, | |
3491 | &Qhthumbleft_part, "hthumbleft-part", &Qscrollbar_click, | |
3492 | &Qhthumbright_part,"hthumbright-part", &Qscrollbar_click | |
3493 | }; | |
3494 | ||
3495 | syms_of_keyboard () | |
3496 | { | |
3497 | Qself_insert_command = intern ("self-insert-command"); | |
3498 | staticpro (&Qself_insert_command); | |
3499 | ||
3500 | Qforward_char = intern ("forward-char"); | |
3501 | staticpro (&Qforward_char); | |
3502 | ||
3503 | Qbackward_char = intern ("backward-char"); | |
3504 | staticpro (&Qbackward_char); | |
3505 | ||
3506 | Qdisabled = intern ("disabled"); | |
3507 | staticpro (&Qdisabled); | |
3508 | ||
3509 | Qfunction_key = intern ("function-key"); | |
3510 | staticpro (&Qfunction_key); | |
3511 | Qmouse_movement = intern ("mouse-click"); | |
3512 | staticpro (&Qmouse_click); | |
3513 | Qmouse_movement = intern ("scrollbar-click"); | |
3514 | staticpro (&Qmouse_movement); | |
3515 | ||
3516 | Qmode_line = intern ("mode-line"); | |
3517 | staticpro (&Qmode_line); | |
e5d77022 JB |
3518 | Qvertical_line = intern ("vertical-line"); |
3519 | staticpro (&Qvertical_line); | |
284f4730 JB |
3520 | |
3521 | Qevent_kind = intern ("event-type"); | |
3522 | staticpro (&Qevent_kind); | |
3523 | Qevent_unmodified = intern ("event-unmodified"); | |
3524 | staticpro (&Qevent_unmodified); | |
3525 | ||
3526 | { | |
3527 | struct event_head *p; | |
3528 | ||
3529 | for (p = head_table; | |
3530 | p < head_table + (sizeof (head_table) / sizeof (head_table[0])); | |
3531 | p++) | |
3532 | { | |
3533 | *p->var = intern (p->name); | |
3534 | staticpro (p->var); | |
3535 | Fput (*p->var, Qevent_kind, *p->kind); | |
3536 | Fput (*p->var, Qevent_unmodified, *p->var); | |
3537 | } | |
3538 | } | |
3539 | ||
3540 | func_key_syms = Qnil; | |
3541 | staticpro (&func_key_syms); | |
3542 | ||
3543 | mouse_syms = Qnil; | |
3544 | staticpro (&mouse_syms); | |
3545 | ||
3546 | defsubr (&Sread_key_sequence); | |
3547 | defsubr (&Srecursive_edit); | |
3548 | defsubr (&Strack_mouse); | |
3549 | defsubr (&Smouse_click_p); | |
3550 | defsubr (&Sinput_pending_p); | |
3551 | defsubr (&Scommand_execute); | |
3552 | defsubr (&Srecent_keys); | |
3553 | defsubr (&Sthis_command_keys); | |
3554 | defsubr (&Ssuspend_emacs); | |
3555 | defsubr (&Sabort_recursive_edit); | |
3556 | defsubr (&Sexit_recursive_edit); | |
3557 | defsubr (&Srecursion_depth); | |
3558 | defsubr (&Stop_level); | |
3559 | defsubr (&Sdiscard_input); | |
3560 | defsubr (&Sopen_dribble_file); | |
3561 | defsubr (&Sset_input_mode); | |
3562 | defsubr (&Sexecute_extended_command); | |
3563 | ||
3564 | DEFVAR_LISP ("disabled-command-hook", &Vdisabled_command_hook, | |
3565 | "Value is called instead of any command that is disabled\n\ | |
3566 | (has a non-nil `disabled' property)."); | |
3567 | ||
3568 | DEFVAR_LISP ("last-command-char", &last_command_char, | |
3569 | "Last terminal input key that was part of a command."); | |
3570 | ||
3571 | DEFVAR_LISP ("last-input-char", &last_input_char, | |
3572 | "Last terminal input key."); | |
3573 | ||
3574 | DEFVAR_LISP ("unread-command-char", &unread_command_char, | |
3575 | "Object to be read as next input from input stream, or nil if none."); | |
3576 | ||
3577 | DEFVAR_LISP ("meta-prefix-char", &meta_prefix_char, | |
3578 | "Meta-prefix character code. Meta-foo as command input\n\ | |
3579 | turns into this character followed by foo."); | |
3580 | XSET (meta_prefix_char, Lisp_Int, 033); | |
3581 | ||
3582 | DEFVAR_LISP ("last-command", &last_command, | |
3583 | "The last command executed. Normally a symbol with a function definition,\n\ | |
3584 | but can be whatever was found in the keymap, or whatever the variable\n\ | |
3585 | `this-command' was set to by that command."); | |
3586 | last_command = Qnil; | |
3587 | ||
3588 | DEFVAR_LISP ("this-command", &this_command, | |
3589 | "The command now being executed.\n\ | |
3590 | The command can set this variable; whatever is put here\n\ | |
3591 | will be in `last-command' during the following command."); | |
3592 | this_command = Qnil; | |
3593 | ||
3594 | DEFVAR_INT ("auto-save-interval", &auto_save_interval, | |
3595 | "*Number of keyboard input characters between auto-saves.\n\ | |
3596 | Zero means disable autosaving due to number of characters typed."); | |
3597 | auto_save_interval = 300; | |
3598 | ||
3599 | DEFVAR_LISP ("auto-save-timeout", &Vauto_save_timeout, | |
3600 | "*Number of seconds idle time before auto-save.\n\ | |
06ef7355 RS |
3601 | Zero or nil means disable auto-saving due to idleness.\n\ |
3602 | After auto-saving due to this many seconds of idle time,\n\ | |
84447c71 | 3603 | Emacs also does a garbage collection if that seems to be warranted."); |
284f4730 JB |
3604 | XFASTINT (Vauto_save_timeout) = 30; |
3605 | ||
3606 | DEFVAR_INT ("echo-keystrokes", &echo_keystrokes, | |
3607 | "*Nonzero means echo unfinished commands after this many seconds of pause."); | |
3608 | echo_keystrokes = 1; | |
3609 | ||
3610 | DEFVAR_INT ("polling-period", &polling_period, | |
3611 | "*Interval between polling for input during Lisp execution.\n\ | |
3612 | The reason for polling is to make C-g work to stop a running program.\n\ | |
3613 | Polling is needed only when using X windows and SIGIO does not work.\n\ | |
3614 | Polling is automatically disabled in all other cases."); | |
3615 | polling_period = 2; | |
3616 | ||
3617 | DEFVAR_INT ("num-input-keys", &num_input_keys, | |
3618 | "*Number of complete keys read from the keyboard so far."); | |
3619 | num_input_keys = 0; | |
3620 | ||
ff11dfa1 JB |
3621 | DEFVAR_LISP ("last-event-frame", &Vlast_event_frame, |
3622 | "*The frame in which the most recently read event occurred."); | |
3623 | Vlast_event_frame = Qnil; | |
284f4730 JB |
3624 | |
3625 | DEFVAR_LISP ("help-char", &help_char, | |
3626 | "Character to recognize as meaning Help.\n\ | |
3627 | When it is read, do `(eval help-form)', and display result if it's a string.\n\ | |
3628 | If the value of `help-form' is nil, this char can be read normally."); | |
3629 | XSET (help_char, Lisp_Int, Ctl ('H')); | |
3630 | ||
3631 | DEFVAR_LISP ("help-form", &Vhelp_form, | |
3632 | "Form to execute when character help-char is read.\n\ | |
3633 | If the form returns a string, that string is displayed.\n\ | |
3634 | If `help-form' is nil, the help char is not recognized."); | |
3635 | Vhelp_form = Qnil; | |
3636 | ||
3637 | DEFVAR_LISP ("top-level", &Vtop_level, | |
3638 | "Form to evaluate when Emacs starts up.\n\ | |
3639 | Useful to set before you dump a modified Emacs."); | |
3640 | Vtop_level = Qnil; | |
3641 | ||
3642 | DEFVAR_LISP ("keyboard-translate-table", &Vkeyboard_translate_table, | |
3643 | "String used as translate table for keyboard input, or nil.\n\ | |
3644 | Each character is looked up in this string and the contents used instead.\n\ | |
3645 | If string is of length N, character codes N and up are untranslated."); | |
3646 | Vkeyboard_translate_table = Qnil; | |
3647 | ||
3648 | #ifdef HAVE_X_WINDOWS | |
3649 | DEFVAR_LISP ("mouse-event-function", &Vmouse_event_function, | |
3650 | "Function to call for each mouse event, after the event's definition.\n\ | |
3651 | Called, if non-nil, with one argument, which is the event-list.\n\ | |
3652 | See the variable `mouse-event' for the format of this list."); | |
3653 | Vmouse_event_function = Qnil; | |
3654 | ||
3655 | DEFVAR_LISP ("mouse-left-hook", &Vmouse_left_hook, | |
3656 | "Function to call when mouse leaves window. No arguments."); | |
3657 | Vmouse_left_hook = Qnil; | |
3658 | ||
ff11dfa1 JB |
3659 | DEFVAR_LISP ("map-frame-hook", &Vmap_frame_hook, |
3660 | "Function to call when frame is mapped. No arguments."); | |
3661 | Vmap_frame_hook = Qnil; | |
284f4730 | 3662 | |
ff11dfa1 JB |
3663 | DEFVAR_LISP ("unmap-frame-hook", &Vunmap_frame_hook, |
3664 | "Function to call when frame is unmapped. No arguments."); | |
3665 | Vunmap_frame_hook = Qnil; | |
284f4730 JB |
3666 | |
3667 | DEFVAR_LISP ("mouse-motion-handler", &Vmouse_motion_handler, | |
3668 | "Handler for motion events. No arguments."); | |
3669 | Vmouse_motion_handler = Qnil; | |
3670 | #endif | |
3671 | ||
3672 | DEFVAR_BOOL ("menu-prompting", &menu_prompting, | |
3673 | "Non-nil means prompt with menus in echo area when appropriate.\n\ | |
3674 | This is done when reading from a keymap that has a prompt string,\n\ | |
3675 | for elements that have prompt strings."); | |
3676 | menu_prompting = 1; | |
3677 | ||
3678 | DEFVAR_LISP ("menu-prompt-more-char", &menu_prompt_more_char, | |
3679 | "Character to see next line of menu prompt.\n\ | |
3680 | Type this character while in a menu prompt to rotate around the lines of it."); | |
3681 | XSET (menu_prompt_more_char, Lisp_Int, ' '); | |
3682 | } | |
3683 | ||
3684 | keys_of_keyboard () | |
3685 | { | |
3686 | initial_define_key (global_map, Ctl ('Z'), "suspend-emacs"); | |
3687 | initial_define_key (control_x_map, Ctl ('Z'), "suspend-emacs"); | |
3688 | initial_define_key (meta_map, Ctl ('C'), "exit-recursive-edit"); | |
3689 | initial_define_key (global_map, Ctl (']'), "abort-recursive-edit"); | |
3690 | initial_define_key (meta_map, 'x', "execute-extended-command"); | |
3691 | } |