Commit | Line | Data |
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284f4730 | 1 | /* Keyboard and mouse input; editor command loop. |
86e5706b | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993 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 | |
7b4aedb9 | 8 | the Free Software Foundation; either version 2, or (at your option) |
284f4730 JB |
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" | |
f4255cd1 | 36 | #include "dispextern.h" |
284f4730 JB |
37 | #include "keyboard.h" |
38 | #include <setjmp.h> | |
39 | #include <errno.h> | |
40 | ||
284f4730 JB |
41 | #ifndef VMS |
42 | #include <sys/ioctl.h> | |
284f4730 JB |
43 | #endif |
44 | ||
52baf19e | 45 | #include "syssignal.h" |
6ef5b54f | 46 | #include "systty.h" |
ffd56f97 | 47 | #include "systime.h" |
52baf19e JB |
48 | |
49 | extern int errno; | |
50 | ||
284f4730 JB |
51 | #ifdef HAVE_X_WINDOWS |
52 | extern Lisp_Object Vmouse_grabbed; | |
53 | ||
54 | /* Make all keyboard buffers much bigger when using X windows. */ | |
55 | #define KBD_BUFFER_SIZE 4096 | |
56 | #else /* No X-windows, character input */ | |
57 | #define KBD_BUFFER_SIZE 256 | |
58 | #endif /* No X-windows */ | |
59 | ||
60 | /* Following definition copied from eval.c */ | |
61 | ||
62 | struct backtrace | |
63 | { | |
64 | struct backtrace *next; | |
65 | Lisp_Object *function; | |
66 | Lisp_Object *args; /* Points to vector of args. */ | |
67 | int nargs; /* length of vector. If nargs is UNEVALLED, | |
68 | args points to slot holding list of | |
69 | unevalled args */ | |
70 | char evalargs; | |
71 | }; | |
72 | ||
73 | /* Non-nil disable property on a command means | |
74 | do not execute it; call disabled-command-hook's value instead. */ | |
75 | Lisp_Object Qdisabled, Vdisabled_command_hook; | |
76 | ||
77 | #define NUM_RECENT_KEYS (100) | |
78 | int recent_keys_index; /* Index for storing next element into recent_keys */ | |
79 | int total_keys; /* Total number of elements stored into recent_keys */ | |
5160df46 | 80 | Lisp_Object recent_keys; /* A vector, holding the last 100 keystrokes */ |
284f4730 | 81 | |
6569cc8d JB |
82 | /* Vector holding the key sequence that invoked the current command. |
83 | It is reused for each command, and it may be longer than the current | |
84 | sequence; this_command_key_count indicates how many elements | |
85 | actually mean something. | |
86 | It's easier to staticpro a single Lisp_Object than an array. */ | |
87 | Lisp_Object this_command_keys; | |
88 | int this_command_key_count; | |
284f4730 JB |
89 | |
90 | extern int minbuf_level; | |
91 | ||
92 | extern struct backtrace *backtrace_list; | |
93 | ||
94 | /* Nonzero means do menu prompting. */ | |
95 | static int menu_prompting; | |
96 | ||
97 | /* Character to see next line of menu prompt. */ | |
98 | static Lisp_Object menu_prompt_more_char; | |
99 | ||
100 | /* For longjmp to where kbd input is being done. */ | |
101 | static jmp_buf getcjmp; | |
102 | ||
103 | /* True while doing kbd input. */ | |
104 | int waiting_for_input; | |
105 | ||
106 | /* True while displaying for echoing. Delays C-g throwing. */ | |
107 | static int echoing; | |
108 | ||
109 | /* Nonzero means C-G should cause immediate error-signal. */ | |
110 | int immediate_quit; | |
111 | ||
112 | /* Character to recognize as the help char. */ | |
113 | Lisp_Object help_char; | |
114 | ||
115 | /* Form to execute when help char is typed. */ | |
116 | Lisp_Object Vhelp_form; | |
117 | ||
118 | /* Character that causes a quit. Normally C-g. | |
119 | ||
120 | If we are running on an ordinary terminal, this must be an ordinary | |
121 | ASCII char, since we want to make it our interrupt character. | |
122 | ||
123 | If we are not running on an ordinary terminal, it still needs to be | |
124 | an ordinary ASCII char. This character needs to be recognized in | |
125 | the input interrupt handler. At this point, the keystroke is | |
126 | represented as a struct input_event, while the desired quit | |
127 | character is specified as a lispy event. The mapping from struct | |
128 | input_events to lispy events cannot run in an interrupt handler, | |
129 | and the reverse mapping is difficult for anything but ASCII | |
130 | keystrokes. | |
131 | ||
132 | FOR THESE ELABORATE AND UNSATISFYING REASONS, quit_char must be an | |
133 | ASCII character. */ | |
134 | int quit_char; | |
135 | ||
136 | extern Lisp_Object current_global_map; | |
137 | extern int minibuf_level; | |
138 | ||
139 | /* Current depth in recursive edits. */ | |
140 | int command_loop_level; | |
141 | ||
142 | /* Total number of times command_loop has read a key sequence. */ | |
143 | int num_input_keys; | |
144 | ||
145 | /* Last input character read as a command. */ | |
146 | Lisp_Object last_command_char; | |
147 | ||
7d6de002 RS |
148 | /* Last input character read as a command, not counting menus |
149 | reached by the mouse. */ | |
150 | Lisp_Object last_nonmenu_event; | |
151 | ||
284f4730 JB |
152 | /* Last input character read for any purpose. */ |
153 | Lisp_Object last_input_char; | |
154 | ||
dbc4e1c1 JB |
155 | /* If not Qnil, a list of objects to be read as subsequent command input. */ |
156 | Lisp_Object unread_command_events; | |
284f4730 | 157 | |
86e5706b RS |
158 | /* If not -1, an event to be read as subsequent command input. */ |
159 | int unread_command_char; | |
160 | ||
cd21b839 JB |
161 | /* If not Qnil, this is a switch-frame event which we decided to put |
162 | off until the end of a key sequence. This should be read as the | |
dbc4e1c1 | 163 | next command input, after any unread_command_events. |
8f805655 JB |
164 | |
165 | read_key_sequence uses this to delay switch-frame events until the | |
166 | end of the key sequence; Fread_char uses it to put off switch-frame | |
167 | events until a non-ASCII event is acceptable as input. */ | |
168 | Lisp_Object unread_switch_frame; | |
cd21b839 | 169 | |
9fa4395d RS |
170 | /* A mask of extra modifier bits to put into every keyboard char. */ |
171 | int extra_keyboard_modifiers; | |
172 | ||
284f4730 JB |
173 | /* Char to use as prefix when a meta character is typed in. |
174 | This is bound on entry to minibuffer in case ESC is changed there. */ | |
175 | ||
176 | Lisp_Object meta_prefix_char; | |
177 | ||
178 | /* Last size recorded for a current buffer which is not a minibuffer. */ | |
179 | static int last_non_minibuf_size; | |
180 | ||
06ef7355 | 181 | /* Number of idle seconds before an auto-save and garbage collection. */ |
284f4730 JB |
182 | static Lisp_Object Vauto_save_timeout; |
183 | ||
184 | /* Total number of times read_char has returned. */ | |
185 | int num_input_chars; | |
186 | ||
51172b6d RS |
187 | /* Total number of times read_char has returned, outside of macros. */ |
188 | int num_nonmacro_input_chars; | |
189 | ||
284f4730 JB |
190 | /* Auto-save automatically when this many characters have been typed |
191 | since the last time. */ | |
192 | ||
193 | static int auto_save_interval; | |
194 | ||
51172b6d | 195 | /* Value of num_nonmacro_input_chars as of last auto save. */ |
284f4730 JB |
196 | |
197 | int last_auto_save; | |
198 | ||
199 | /* Last command executed by the editor command loop, not counting | |
200 | commands that set the prefix argument. */ | |
201 | ||
202 | Lisp_Object last_command; | |
203 | ||
204 | /* The command being executed by the command loop. | |
205 | Commands may set this, and the value set will be copied into last_command | |
206 | instead of the actual command. */ | |
207 | Lisp_Object this_command; | |
208 | ||
07d2b8de | 209 | #ifdef MULTI_FRAME |
fce33686 | 210 | /* The frame in which the last input event occurred, or Qmacro if the |
3c370943 JB |
211 | last event came from a macro. We use this to determine when to |
212 | generate switch-frame events. This may be cleared by functions | |
213 | like Fselect_frame, to make sure that a switch-frame event is | |
214 | generated by the next character. */ | |
215 | Lisp_Object internal_last_event_frame; | |
216 | ||
217 | /* A user-visible version of the above, intended to allow users to | |
218 | figure out where the last event came from, if the event doesn't | |
219 | carry that information itself (i.e. if it was a character). */ | |
ff11dfa1 | 220 | Lisp_Object Vlast_event_frame; |
07d2b8de | 221 | #endif |
284f4730 | 222 | |
1113d9db JB |
223 | /* The timestamp of the last input event we received from the X server. |
224 | X Windows wants this for selection ownership. */ | |
284f4730 JB |
225 | unsigned long last_event_timestamp; |
226 | ||
227 | Lisp_Object Qself_insert_command; | |
228 | Lisp_Object Qforward_char; | |
229 | Lisp_Object Qbackward_char; | |
230 | ||
231 | /* read_key_sequence stores here the command definition of the | |
232 | key sequence that it reads. */ | |
233 | Lisp_Object read_key_sequence_cmd; | |
234 | ||
235 | /* Form to evaluate (if non-nil) when Emacs is started. */ | |
236 | Lisp_Object Vtop_level; | |
237 | ||
238 | /* User-supplied string to translate input characters through. */ | |
239 | Lisp_Object Vkeyboard_translate_table; | |
240 | ||
241 | /* Keymap mapping ASCII function key sequences onto their preferred forms. */ | |
242 | extern Lisp_Object Vfunction_key_map; | |
243 | ||
86e5706b RS |
244 | /* Non-nil means deactivate the mark at end of this command. */ |
245 | Lisp_Object Vdeactivate_mark; | |
246 | ||
247 | /* Hooks to run before and after each command. */ | |
248 | Lisp_Object Qpre_command_hook, Qpost_command_hook; | |
249 | Lisp_Object Vpre_command_hook, Vpost_command_hook; | |
250 | ||
284f4730 JB |
251 | /* File in which we write all commands we read. */ |
252 | FILE *dribble; | |
253 | ||
254 | /* Nonzero if input is available. */ | |
255 | int input_pending; | |
256 | ||
257 | /* Nonzero if should obey 0200 bit in input chars as "Meta". */ | |
258 | int meta_key; | |
259 | ||
260 | extern char *pending_malloc_warning; | |
261 | ||
262 | /* Circular buffer for pre-read keyboard input. */ | |
263 | static struct input_event kbd_buffer[KBD_BUFFER_SIZE]; | |
264 | ||
7b4aedb9 | 265 | /* Vector to GCPRO the frames and windows mentioned in kbd_buffer. |
4bb994d1 | 266 | |
7b4aedb9 JB |
267 | The interrupt-level event handlers will never enqueue an event on a |
268 | frame which is not in Vframe_list, and once an event is dequeued, | |
3c370943 JB |
269 | internal_last_event_frame or the event itself points to the frame. |
270 | So that's all fine. | |
4bb994d1 JB |
271 | |
272 | But while the event is sitting in the queue, it's completely | |
273 | unprotected. Suppose the user types one command which will run for | |
274 | a while and then delete a frame, and then types another event at | |
275 | the frame that will be deleted, before the command gets around to | |
276 | it. Suppose there are no references to this frame elsewhere in | |
277 | Emacs, and a GC occurs before the second event is dequeued. Now we | |
278 | have an event referring to a freed frame, which will crash Emacs | |
279 | when it is dequeued. | |
280 | ||
3c370943 | 281 | Similar things happen when an event on a scroll bar is enqueued; the |
7b4aedb9 | 282 | window may be deleted while the event is in the queue. |
4bb994d1 | 283 | |
7b4aedb9 JB |
284 | So, we use this vector to protect the frame_or_window field in the |
285 | event queue. That way, they'll be dequeued as dead frames or | |
286 | windows, but still valid lisp objects. | |
287 | ||
288 | If kbd_buffer[i].kind != no_event, then | |
289 | (XVECTOR (kbd_buffer_frame_or_window)->contents[i] | |
290 | == kbd_buffer[i].frame_or_window. */ | |
291 | static Lisp_Object kbd_buffer_frame_or_window; | |
4bb994d1 | 292 | |
284f4730 JB |
293 | /* Pointer to next available character in kbd_buffer. |
294 | If kbd_fetch_ptr == kbd_store_ptr, the buffer is empty. | |
295 | This may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the the | |
296 | next available char is in kbd_buffer[0]. */ | |
297 | static struct input_event *kbd_fetch_ptr; | |
298 | ||
299 | /* Pointer to next place to store character in kbd_buffer. This | |
300 | may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the next | |
301 | character should go in kbd_buffer[0]. */ | |
ff0b5f4c JB |
302 | #ifdef __STDC__ |
303 | volatile | |
304 | #endif | |
284f4730 JB |
305 | static struct input_event *kbd_store_ptr; |
306 | ||
307 | /* The above pair of variables forms a "queue empty" flag. When we | |
308 | enqueue a non-hook event, we increment kbd_write_count. When we | |
309 | dequeue a non-hook event, we increment kbd_read_count. We say that | |
4bb994d1 | 310 | there is input available iff the two counters are not equal. |
284f4730 JB |
311 | |
312 | Why not just have a flag set and cleared by the enqueuing and | |
313 | dequeuing functions? Such a flag could be screwed up by interrupts | |
314 | at inopportune times. */ | |
315 | ||
4bb994d1 JB |
316 | /* If this flag is non-zero, we will check mouse_moved to see when the |
317 | mouse moves, and motion events will appear in the input stream. If | |
318 | it is zero, mouse motion will be ignored. */ | |
284f4730 JB |
319 | int do_mouse_tracking; |
320 | ||
321 | /* The window system handling code should set this if the mouse has | |
322 | moved since the last call to the mouse_position_hook. Calling that | |
323 | hook should clear this. Code assumes that if this is set, it can | |
324 | call mouse_position_hook to get the promised position, so don't set | |
325 | it unless you're prepared to substantiate the claim! */ | |
326 | int mouse_moved; | |
327 | ||
328 | /* True iff there is an event in kbd_buffer, or if mouse tracking is | |
329 | enabled and there is a new mouse position in the mouse movement | |
330 | buffer. Note that if this is false, that doesn't mean that there | |
331 | is readable input; all the events in the queue might be button-up | |
332 | events, and do_mouse_tracking might be off. */ | |
333 | #define EVENT_QUEUES_EMPTY \ | |
334 | ((kbd_fetch_ptr == kbd_store_ptr) && (!do_mouse_tracking || !mouse_moved)) | |
335 | ||
336 | ||
337 | /* Symbols to head events. */ | |
338 | Lisp_Object Qmouse_movement; | |
3c370943 | 339 | Lisp_Object Qscroll_bar_movement; |
284f4730 | 340 | |
cd21b839 JB |
341 | Lisp_Object Qswitch_frame; |
342 | ||
284f4730 JB |
343 | /* Symbols to denote kinds of events. */ |
344 | Lisp_Object Qfunction_key; | |
345 | Lisp_Object Qmouse_click; | |
346 | /* Lisp_Object Qmouse_movement; - also an event header */ | |
284f4730 JB |
347 | |
348 | /* Properties of event headers. */ | |
349 | Lisp_Object Qevent_kind; | |
88cb0656 | 350 | Lisp_Object Qevent_symbol_elements; |
284f4730 | 351 | |
0a7f1fc0 JB |
352 | /* An event header symbol HEAD may have a property named |
353 | Qevent_symbol_element_mask, which is of the form (BASE MODIFIERS); | |
354 | BASE is the base, unmodified version of HEAD, and MODIFIERS is the | |
355 | mask of modifiers applied to it. If present, this is used to help | |
356 | speed up parse_modifiers. */ | |
357 | Lisp_Object Qevent_symbol_element_mask; | |
358 | ||
359 | /* An unmodified event header BASE may have a property named | |
360 | Qmodifier_cache, which is an alist mapping modifier masks onto | |
361 | modified versions of BASE. If present, this helps speed up | |
362 | apply_modifiers. */ | |
363 | Lisp_Object Qmodifier_cache; | |
364 | ||
284f4730 JB |
365 | /* Symbols to use for non-text mouse positions. */ |
366 | Lisp_Object Qmode_line; | |
e5d77022 | 367 | Lisp_Object Qvertical_line; |
3c370943 | 368 | Lisp_Object Qvertical_scroll_bar; |
284f4730 | 369 | |
f4255cd1 JB |
370 | Lisp_Object recursive_edit_unwind (), command_loop (); |
371 | Lisp_Object Fthis_command_keys (); | |
284f4730 | 372 | |
ffd56f97 JB |
373 | /* Address (if not 0) of EMACS_TIME to zero out if a SIGIO interrupt |
374 | happens. */ | |
375 | EMACS_TIME *input_available_clear_time; | |
284f4730 JB |
376 | |
377 | /* Nonzero means use SIGIO interrupts; zero means use CBREAK mode. | |
378 | Default is 1 if INTERRUPT_INPUT is defined. */ | |
379 | int interrupt_input; | |
380 | ||
381 | /* Nonzero while interrupts are temporarily deferred during redisplay. */ | |
382 | int interrupts_deferred; | |
383 | ||
384 | /* nonzero means use ^S/^Q for flow control. */ | |
385 | int flow_control; | |
386 | ||
284f4730 JB |
387 | /* Allow m- file to inhibit use of FIONREAD. */ |
388 | #ifdef BROKEN_FIONREAD | |
389 | #undef FIONREAD | |
390 | #endif | |
391 | ||
392 | /* We are unable to use interrupts if FIONREAD is not available, | |
393 | so flush SIGIO so we won't try. */ | |
394 | #ifndef FIONREAD | |
395 | #ifdef SIGIO | |
396 | #undef SIGIO | |
397 | #endif | |
398 | #endif | |
399 | ||
400 | /* If we support X Windows, and won't get an interrupt when input | |
401 | arrives from the server, poll periodically so we can detect C-g. */ | |
402 | #ifdef HAVE_X_WINDOWS | |
403 | #ifndef SIGIO | |
404 | #define POLL_FOR_INPUT | |
405 | #endif | |
406 | #endif | |
407 | \f | |
408 | /* Global variable declarations. */ | |
409 | ||
410 | /* Function for init_keyboard to call with no args (if nonzero). */ | |
411 | void (*keyboard_init_hook) (); | |
412 | ||
413 | static int read_avail_input (); | |
414 | static void get_input_pending (); | |
415 | ||
416 | /* > 0 if we are to echo keystrokes. */ | |
417 | static int echo_keystrokes; | |
418 | ||
419 | /* Nonzero means echo each character as typed. */ | |
420 | static int immediate_echo; | |
421 | ||
422 | /* The text we're echoing in the modeline - partial key sequences, | |
f4255cd1 JB |
423 | usually. '\0'-terminated. This really shouldn't have a fixed size. */ |
424 | static char echobuf[300]; | |
284f4730 JB |
425 | |
426 | /* Where to append more text to echobuf if we want to. */ | |
427 | static char *echoptr; | |
428 | ||
429 | #define min(a,b) ((a)<(b)?(a):(b)) | |
430 | #define max(a,b) ((a)>(b)?(a):(b)) | |
431 | ||
432 | /* Install the string STR as the beginning of the string of echoing, | |
433 | so that it serves as a prompt for the next character. | |
434 | Also start echoing. */ | |
435 | ||
436 | echo_prompt (str) | |
437 | char *str; | |
438 | { | |
439 | int len = strlen (str); | |
440 | if (len > sizeof echobuf - 4) | |
441 | len = sizeof echobuf - 4; | |
0a7f1fc0 | 442 | bcopy (str, echobuf, len); |
284f4730 | 443 | echoptr = echobuf + len; |
0a7f1fc0 | 444 | *echoptr = '\0'; |
284f4730 JB |
445 | |
446 | echo (); | |
447 | } | |
448 | ||
449 | /* Add C to the echo string, if echoing is going on. | |
450 | C can be a character, which is printed prettily ("M-C-x" and all that | |
451 | jazz), or a symbol, whose name is printed. */ | |
452 | ||
453 | echo_char (c) | |
454 | Lisp_Object c; | |
455 | { | |
456 | extern char *push_key_description (); | |
457 | ||
458 | if (immediate_echo) | |
459 | { | |
460 | char *ptr = echoptr; | |
461 | ||
462 | if (ptr != echobuf) | |
463 | *ptr++ = ' '; | |
464 | ||
465 | /* If someone has passed us a composite event, use its head symbol. */ | |
88cb0656 | 466 | c = EVENT_HEAD (c); |
284f4730 JB |
467 | |
468 | if (XTYPE (c) == Lisp_Int) | |
469 | { | |
470 | if (ptr - echobuf > sizeof echobuf - 6) | |
471 | return; | |
472 | ||
cb5df6ae | 473 | ptr = push_key_description (XINT (c), ptr); |
284f4730 JB |
474 | } |
475 | else if (XTYPE (c) == Lisp_Symbol) | |
476 | { | |
477 | struct Lisp_String *name = XSYMBOL (c)->name; | |
478 | if (((ptr - echobuf) + name->size + 4) > sizeof echobuf) | |
479 | return; | |
480 | bcopy (name->data, ptr, name->size); | |
481 | ptr += name->size; | |
482 | } | |
483 | ||
f4255cd1 | 484 | if (echoptr == echobuf && EQ (c, help_char)) |
284f4730 JB |
485 | { |
486 | strcpy (ptr, " (Type ? for further options)"); | |
487 | ptr += strlen (ptr); | |
488 | } | |
489 | ||
490 | *ptr = 0; | |
491 | echoptr = ptr; | |
492 | ||
493 | echo (); | |
494 | } | |
495 | } | |
496 | ||
497 | /* Temporarily add a dash to the end of the echo string if it's not | |
498 | empty, so that it serves as a mini-prompt for the very next character. */ | |
499 | ||
500 | echo_dash () | |
501 | { | |
502 | if (!immediate_echo && echoptr == echobuf) | |
503 | return; | |
504 | ||
505 | /* Put a dash at the end of the buffer temporarily, | |
506 | but make it go away when the next character is added. */ | |
507 | echoptr[0] = '-'; | |
508 | echoptr[1] = 0; | |
509 | ||
510 | echo (); | |
511 | } | |
512 | ||
513 | /* Display the current echo string, and begin echoing if not already | |
514 | doing so. */ | |
515 | ||
516 | echo () | |
517 | { | |
518 | if (!immediate_echo) | |
519 | { | |
520 | int i; | |
521 | immediate_echo = 1; | |
522 | ||
523 | for (i = 0; i < this_command_key_count; i++) | |
6569cc8d | 524 | echo_char (XVECTOR (this_command_keys)->contents[i]); |
284f4730 JB |
525 | echo_dash (); |
526 | } | |
527 | ||
528 | echoing = 1; | |
529 | message1 (echobuf); | |
530 | echoing = 0; | |
531 | ||
532 | if (waiting_for_input && !NILP (Vquit_flag)) | |
533 | quit_throw_to_read_char (); | |
534 | } | |
535 | ||
536 | /* Turn off echoing, for the start of a new command. */ | |
537 | ||
538 | cancel_echoing () | |
539 | { | |
540 | immediate_echo = 0; | |
541 | echoptr = echobuf; | |
542 | } | |
543 | ||
544 | /* Return the length of the current echo string. */ | |
545 | ||
546 | static int | |
547 | echo_length () | |
548 | { | |
549 | return echoptr - echobuf; | |
550 | } | |
551 | ||
552 | /* Truncate the current echo message to its first LEN chars. | |
553 | This and echo_char get used by read_key_sequence when the user | |
ff11dfa1 | 554 | switches frames while entering a key sequence. */ |
284f4730 JB |
555 | |
556 | static void | |
557 | echo_truncate (len) | |
558 | int len; | |
559 | { | |
560 | echobuf[len] = '\0'; | |
0a7f1fc0 | 561 | echoptr = echobuf + len; |
284f4730 JB |
562 | } |
563 | ||
564 | \f | |
565 | /* Functions for manipulating this_command_keys. */ | |
566 | static void | |
567 | add_command_key (key) | |
568 | Lisp_Object key; | |
569 | { | |
6569cc8d JB |
570 | int size = XVECTOR (this_command_keys)->size; |
571 | ||
572 | if (this_command_key_count >= size) | |
284f4730 | 573 | { |
6569cc8d JB |
574 | Lisp_Object new_keys = Fmake_vector (make_number (size * 2), Qnil); |
575 | ||
576 | bcopy (XVECTOR (this_command_keys)->contents, | |
577 | XVECTOR (new_keys)->contents, | |
8f805655 | 578 | size * sizeof (Lisp_Object)); |
6569cc8d JB |
579 | |
580 | this_command_keys = new_keys; | |
284f4730 | 581 | } |
6569cc8d JB |
582 | |
583 | XVECTOR (this_command_keys)->contents[this_command_key_count++] = key; | |
284f4730 JB |
584 | } |
585 | \f | |
586 | Lisp_Object | |
587 | recursive_edit_1 () | |
588 | { | |
589 | int count = specpdl_ptr - specpdl; | |
590 | Lisp_Object val; | |
591 | ||
592 | if (command_loop_level > 0) | |
593 | { | |
594 | specbind (Qstandard_output, Qt); | |
595 | specbind (Qstandard_input, Qt); | |
596 | } | |
597 | ||
598 | val = command_loop (); | |
599 | if (EQ (val, Qt)) | |
600 | Fsignal (Qquit, Qnil); | |
601 | ||
cb5df6ae | 602 | return unbind_to (count, Qnil); |
284f4730 JB |
603 | } |
604 | ||
605 | /* When an auto-save happens, record the "time", and don't do again soon. */ | |
606 | record_auto_save () | |
607 | { | |
51172b6d | 608 | last_auto_save = num_nonmacro_input_chars; |
284f4730 JB |
609 | } |
610 | \f | |
284f4730 JB |
611 | DEFUN ("recursive-edit", Frecursive_edit, Srecursive_edit, 0, 0, "", |
612 | "Invoke the editor command loop recursively.\n\ | |
613 | To get out of the recursive edit, a command can do `(throw 'exit nil)';\n\ | |
614 | that tells this function to return.\n\ | |
615 | Alternately, `(throw 'exit t)' makes this function signal an error.\n\ | |
616 | This function is called by the editor initialization to begin editing.") | |
617 | () | |
618 | { | |
619 | int count = specpdl_ptr - specpdl; | |
620 | Lisp_Object val; | |
621 | ||
622 | command_loop_level++; | |
623 | update_mode_lines = 1; | |
624 | ||
625 | record_unwind_protect (recursive_edit_unwind, | |
626 | (command_loop_level | |
627 | && current_buffer != XBUFFER (XWINDOW (selected_window)->buffer)) | |
628 | ? Fcurrent_buffer () | |
629 | : Qnil); | |
630 | recursive_edit_1 (); | |
631 | return unbind_to (count, Qnil); | |
632 | } | |
633 | ||
634 | Lisp_Object | |
635 | recursive_edit_unwind (buffer) | |
636 | Lisp_Object buffer; | |
637 | { | |
638 | if (!NILP (buffer)) | |
639 | Fset_buffer (buffer); | |
640 | ||
641 | command_loop_level--; | |
642 | update_mode_lines = 1; | |
643 | return Qnil; | |
644 | } | |
645 | \f | |
646 | Lisp_Object | |
647 | cmd_error (data) | |
648 | Lisp_Object data; | |
649 | { | |
650 | Lisp_Object errmsg, tail, errname, file_error; | |
651 | Lisp_Object stream; | |
652 | struct gcpro gcpro1; | |
653 | int i; | |
654 | ||
655 | Vquit_flag = Qnil; | |
656 | Vinhibit_quit = Qt; | |
657 | Vstandard_output = Qt; | |
658 | Vstandard_input = Qt; | |
659 | Vexecuting_macro = Qnil; | |
660 | echo_area_glyphs = 0; | |
661 | ||
ff11dfa1 | 662 | /* If the window system or terminal frame hasn't been initialized |
284f4730 JB |
663 | yet, or we're not interactive, it's best to dump this message out |
664 | to stderr and exit. */ | |
ff11dfa1 | 665 | if (! FRAME_MESSAGE_BUF (selected_frame) |
284f4730 JB |
666 | || noninteractive) |
667 | stream = Qexternal_debugging_output; | |
668 | else | |
669 | { | |
670 | Fdiscard_input (); | |
671 | bitch_at_user (); | |
672 | stream = Qt; | |
673 | } | |
674 | ||
675 | errname = Fcar (data); | |
676 | ||
677 | if (EQ (errname, Qerror)) | |
678 | { | |
679 | data = Fcdr (data); | |
680 | if (!CONSP (data)) data = Qnil; | |
681 | errmsg = Fcar (data); | |
682 | file_error = Qnil; | |
683 | } | |
684 | else | |
685 | { | |
686 | errmsg = Fget (errname, Qerror_message); | |
687 | file_error = Fmemq (Qfile_error, | |
688 | Fget (errname, Qerror_conditions)); | |
689 | } | |
690 | ||
691 | /* Print an error message including the data items. | |
692 | This is done by printing it into a scratch buffer | |
693 | and then making a copy of the text in the buffer. */ | |
694 | ||
695 | if (!CONSP (data)) data = Qnil; | |
696 | tail = Fcdr (data); | |
697 | GCPRO1 (tail); | |
698 | ||
699 | /* For file-error, make error message by concatenating | |
700 | all the data items. They are all strings. */ | |
701 | if (!NILP (file_error) && !NILP (tail)) | |
702 | errmsg = XCONS (tail)->car, tail = XCONS (tail)->cdr; | |
703 | ||
704 | if (XTYPE (errmsg) == Lisp_String) | |
705 | Fprinc (errmsg, stream); | |
706 | else | |
707 | write_string_1 ("peculiar error", -1, stream); | |
708 | ||
709 | for (i = 0; CONSP (tail); tail = Fcdr (tail), i++) | |
710 | { | |
711 | write_string_1 (i ? ", " : ": ", 2, stream); | |
712 | if (!NILP (file_error)) | |
713 | Fprinc (Fcar (tail), stream); | |
714 | else | |
715 | Fprin1 (Fcar (tail), stream); | |
716 | } | |
717 | UNGCPRO; | |
718 | ||
ff11dfa1 | 719 | /* If the window system or terminal frame hasn't been initialized |
284f4730 | 720 | yet, or we're in -batch mode, this error should cause Emacs to exit. */ |
ff11dfa1 | 721 | if (! FRAME_MESSAGE_BUF (selected_frame) |
284f4730 JB |
722 | || noninteractive) |
723 | { | |
724 | Fterpri (stream); | |
725 | Fkill_emacs (make_number (-1)); | |
726 | } | |
727 | ||
728 | Vquit_flag = Qnil; | |
729 | ||
730 | Vinhibit_quit = Qnil; | |
731 | return make_number (0); | |
732 | } | |
733 | \f | |
734 | Lisp_Object command_loop_1 (); | |
735 | Lisp_Object command_loop_2 (); | |
736 | Lisp_Object top_level_1 (); | |
737 | ||
738 | /* Entry to editor-command-loop. | |
739 | This level has the catches for exiting/returning to editor command loop. | |
740 | It returns nil to exit recursive edit, t to abort it. */ | |
741 | ||
742 | Lisp_Object | |
743 | command_loop () | |
744 | { | |
745 | if (command_loop_level > 0 || minibuf_level > 0) | |
746 | { | |
747 | return internal_catch (Qexit, command_loop_2, Qnil); | |
748 | } | |
749 | else | |
750 | while (1) | |
751 | { | |
752 | internal_catch (Qtop_level, top_level_1, Qnil); | |
753 | internal_catch (Qtop_level, command_loop_2, Qnil); | |
754 | ||
755 | /* End of file in -batch run causes exit here. */ | |
756 | if (noninteractive) | |
757 | Fkill_emacs (Qt); | |
758 | } | |
759 | } | |
760 | ||
761 | /* Here we catch errors in execution of commands within the | |
762 | editing loop, and reenter the editing loop. | |
763 | When there is an error, cmd_error runs and returns a non-nil | |
764 | value to us. A value of nil means that cmd_loop_1 itself | |
765 | returned due to end of file (or end of kbd macro). */ | |
766 | ||
767 | Lisp_Object | |
768 | command_loop_2 () | |
769 | { | |
770 | register Lisp_Object val; | |
771 | ||
772 | do | |
773 | val = internal_condition_case (command_loop_1, Qerror, cmd_error); | |
774 | while (!NILP (val)); | |
775 | ||
776 | return Qnil; | |
777 | } | |
778 | ||
779 | Lisp_Object | |
780 | top_level_2 () | |
781 | { | |
782 | return Feval (Vtop_level); | |
783 | } | |
784 | ||
785 | Lisp_Object | |
786 | top_level_1 () | |
787 | { | |
788 | /* On entry to the outer level, run the startup file */ | |
789 | if (!NILP (Vtop_level)) | |
790 | internal_condition_case (top_level_2, Qerror, cmd_error); | |
791 | else if (!NILP (Vpurify_flag)) | |
792 | message ("Bare impure Emacs (standard Lisp code not loaded)"); | |
793 | else | |
794 | message ("Bare Emacs (standard Lisp code not loaded)"); | |
795 | return Qnil; | |
796 | } | |
797 | ||
798 | DEFUN ("top-level", Ftop_level, Stop_level, 0, 0, "", | |
799 | "Exit all recursive editing levels.") | |
800 | () | |
801 | { | |
802 | Fthrow (Qtop_level, Qnil); | |
803 | } | |
804 | ||
805 | DEFUN ("exit-recursive-edit", Fexit_recursive_edit, Sexit_recursive_edit, 0, 0, "", | |
806 | "Exit from the innermost recursive edit or minibuffer.") | |
807 | () | |
808 | { | |
809 | if (command_loop_level > 0 || minibuf_level > 0) | |
810 | Fthrow (Qexit, Qnil); | |
811 | ||
812 | error ("No recursive edit is in progress"); | |
813 | } | |
814 | ||
815 | DEFUN ("abort-recursive-edit", Fabort_recursive_edit, Sabort_recursive_edit, 0, 0, "", | |
816 | "Abort the command that requested this recursive edit or minibuffer input.") | |
817 | () | |
818 | { | |
819 | if (command_loop_level > 0 || minibuf_level > 0) | |
820 | Fthrow (Qexit, Qt); | |
821 | ||
822 | error ("No recursive edit is in progress"); | |
823 | } | |
824 | \f | |
825 | /* This is the actual command reading loop, | |
826 | sans error-handling encapsulation. */ | |
827 | ||
828 | Lisp_Object Fcommand_execute (); | |
829 | static int read_key_sequence (); | |
830 | ||
831 | Lisp_Object | |
832 | command_loop_1 () | |
833 | { | |
834 | Lisp_Object cmd; | |
835 | int lose; | |
836 | int nonundocount; | |
837 | Lisp_Object keybuf[30]; | |
838 | int i; | |
839 | int no_redisplay; | |
840 | int no_direct; | |
86e5706b RS |
841 | int prev_modiff; |
842 | struct buffer *prev_buffer; | |
284f4730 JB |
843 | |
844 | Vprefix_arg = Qnil; | |
86e5706b | 845 | Vdeactivate_mark = Qnil; |
284f4730 JB |
846 | waiting_for_input = 0; |
847 | cancel_echoing (); | |
848 | ||
849 | /* Don't clear out last_command at the beginning of a macro. */ | |
850 | if (XTYPE (Vexecuting_macro) != Lisp_String) | |
851 | last_command = Qt; | |
852 | ||
853 | nonundocount = 0; | |
854 | no_redisplay = 0; | |
855 | this_command_key_count = 0; | |
856 | ||
857 | while (1) | |
858 | { | |
859 | /* Install chars successfully executed in kbd macro. */ | |
860 | ||
861 | if (defining_kbd_macro && NILP (Vprefix_arg)) | |
862 | finalize_kbd_macro_chars (); | |
863 | ||
864 | /* Make sure the current window's buffer is selected. */ | |
865 | if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) | |
866 | set_buffer_internal (XBUFFER (XWINDOW (selected_window)->buffer)); | |
867 | ||
868 | /* Display any malloc warning that just came out. Use while because | |
869 | displaying one warning can cause another. */ | |
870 | ||
871 | while (pending_malloc_warning) | |
872 | display_malloc_warning (); | |
873 | ||
874 | no_direct = 0; | |
875 | ||
86e5706b RS |
876 | Vdeactivate_mark = Qnil; |
877 | ||
284f4730 JB |
878 | /* If minibuffer on and echo area in use, |
879 | wait 2 sec and redraw minibufer. */ | |
880 | ||
881 | if (minibuf_level && echo_area_glyphs) | |
882 | { | |
f1bed6d8 RS |
883 | /* Bind inhibit-quit to t so that C-g gets read in |
884 | rather than quitting back to the minibuffer. */ | |
885 | int count = specpdl_ptr - specpdl; | |
886 | specbind (Qinhibit_quit, Qt); | |
284f4730 | 887 | Fsit_for (make_number (2), Qnil, Qnil); |
cb5df6ae | 888 | unbind_to (count, Qnil); |
f1bed6d8 | 889 | |
284f4730 JB |
890 | echo_area_glyphs = 0; |
891 | no_direct = 1; | |
892 | if (!NILP (Vquit_flag)) | |
893 | { | |
894 | Vquit_flag = Qnil; | |
dbc4e1c1 | 895 | unread_command_events = Fcons (make_number (quit_char), Qnil); |
284f4730 JB |
896 | } |
897 | } | |
898 | ||
899 | #ifdef C_ALLOCA | |
900 | alloca (0); /* Cause a garbage collection now */ | |
901 | /* Since we can free the most stuff here. */ | |
902 | #endif /* C_ALLOCA */ | |
903 | ||
8f805655 | 904 | #if 0 |
ff11dfa1 | 905 | #ifdef MULTI_FRAME |
8f805655 JB |
906 | /* Select the frame that the last event came from. Usually, |
907 | switch-frame events will take care of this, but if some lisp | |
908 | code swallows a switch-frame event, we'll fix things up here. | |
909 | Is this a good idea? */ | |
3c370943 JB |
910 | if (XTYPE (internal_last_event_frame) == Lisp_Frame |
911 | && XFRAME (internal_last_event_frame) != selected_frame) | |
912 | Fselect_frame (internal_last_event_frame, Qnil); | |
cd21b839 | 913 | #endif |
284f4730 JB |
914 | #endif |
915 | ||
8f805655 JB |
916 | /* Read next key sequence; i gets its length. */ |
917 | i = read_key_sequence (keybuf, (sizeof keybuf / sizeof (keybuf[0])), 0); | |
918 | ||
919 | ++num_input_keys; | |
920 | ||
284f4730 JB |
921 | /* Now we have read a key sequence of length I, |
922 | or else I is 0 and we found end of file. */ | |
923 | ||
924 | if (i == 0) /* End of file -- happens only in */ | |
925 | return Qnil; /* a kbd macro, at the end. */ | |
926 | ||
284f4730 JB |
927 | last_command_char = keybuf[i - 1]; |
928 | ||
929 | cmd = read_key_sequence_cmd; | |
930 | if (!NILP (Vexecuting_macro)) | |
931 | { | |
932 | if (!NILP (Vquit_flag)) | |
933 | { | |
934 | Vexecuting_macro = Qt; | |
935 | QUIT; /* Make some noise. */ | |
936 | /* Will return since macro now empty. */ | |
937 | } | |
938 | } | |
939 | ||
940 | /* Do redisplay processing after this command except in special | |
941 | cases identified below that set no_redisplay to 1. */ | |
942 | no_redisplay = 0; | |
943 | ||
86e5706b RS |
944 | prev_buffer = current_buffer; |
945 | prev_modiff = MODIFF; | |
946 | ||
284f4730 JB |
947 | /* Execute the command. */ |
948 | ||
86e5706b RS |
949 | this_command = cmd; |
950 | if (!NILP (Vpre_command_hook)) | |
951 | call1 (Vrun_hooks, Qpre_command_hook); | |
952 | ||
284f4730 JB |
953 | if (NILP (cmd)) |
954 | { | |
955 | /* nil means key is undefined. */ | |
956 | bitch_at_user (); | |
957 | defining_kbd_macro = 0; | |
958 | update_mode_lines = 1; | |
959 | Vprefix_arg = Qnil; | |
86e5706b | 960 | |
284f4730 JB |
961 | } |
962 | else | |
963 | { | |
284f4730 JB |
964 | if (NILP (Vprefix_arg) && ! no_direct) |
965 | { | |
966 | /* Recognize some common commands in common situations and | |
967 | do them directly. */ | |
968 | if (EQ (cmd, Qforward_char) && point < ZV) | |
969 | { | |
970 | struct Lisp_Vector *dp | |
971 | = window_display_table (XWINDOW (selected_window)); | |
972 | lose = FETCH_CHAR (point); | |
973 | SET_PT (point + 1); | |
974 | if (((dp == 0 && lose >= 040 && lose < 0177) | |
975 | || | |
976 | (dp && (XTYPE (dp->contents[lose]) != Lisp_String | |
977 | || XSTRING (dp->contents[lose])->size == sizeof (GLYPH)))) | |
284f4730 JB |
978 | && (XFASTINT (XWINDOW (selected_window)->last_modified) |
979 | >= MODIFF) | |
980 | && (XFASTINT (XWINDOW (selected_window)->last_point) | |
981 | == point - 1) | |
982 | && !windows_or_buffers_changed | |
983 | && EQ (current_buffer->selective_display, Qnil) | |
984 | && !detect_input_pending () | |
985 | && NILP (Vexecuting_macro)) | |
986 | no_redisplay = direct_output_forward_char (1); | |
987 | goto directly_done; | |
988 | } | |
989 | else if (EQ (cmd, Qbackward_char) && point > BEGV) | |
990 | { | |
991 | struct Lisp_Vector *dp | |
992 | = window_display_table (XWINDOW (selected_window)); | |
993 | SET_PT (point - 1); | |
994 | lose = FETCH_CHAR (point); | |
995 | if (((dp == 0 && lose >= 040 && lose < 0177) | |
996 | || | |
997 | (dp && (XTYPE (dp->contents[lose]) != Lisp_String | |
998 | || XSTRING (dp->contents[lose])->size == sizeof (GLYPH)))) | |
284f4730 JB |
999 | && (XFASTINT (XWINDOW (selected_window)->last_modified) |
1000 | >= MODIFF) | |
1001 | && (XFASTINT (XWINDOW (selected_window)->last_point) | |
1002 | == point + 1) | |
1003 | && !windows_or_buffers_changed | |
1004 | && EQ (current_buffer->selective_display, Qnil) | |
1005 | && !detect_input_pending () | |
1006 | && NILP (Vexecuting_macro)) | |
1007 | no_redisplay = direct_output_forward_char (-1); | |
1008 | goto directly_done; | |
1009 | } | |
1010 | else if (EQ (cmd, Qself_insert_command) | |
1011 | /* Try this optimization only on ascii keystrokes. */ | |
1012 | && XTYPE (last_command_char) == Lisp_Int) | |
1013 | { | |
1014 | unsigned char c = XINT (last_command_char); | |
1015 | ||
1016 | if (NILP (Vexecuting_macro) && | |
1017 | !EQ (minibuf_window, selected_window)) | |
1018 | { | |
1019 | if (!nonundocount || nonundocount >= 20) | |
1020 | { | |
1021 | Fundo_boundary (); | |
1022 | nonundocount = 0; | |
1023 | } | |
1024 | nonundocount++; | |
1025 | } | |
1026 | lose = (XFASTINT (XWINDOW (selected_window)->last_modified) | |
1027 | < MODIFF) | |
1028 | || (XFASTINT (XWINDOW (selected_window)->last_point) | |
1029 | != point) | |
1030 | || MODIFF <= current_buffer->save_modified | |
1031 | || windows_or_buffers_changed | |
1032 | || !EQ (current_buffer->selective_display, Qnil) | |
1033 | || detect_input_pending () | |
1034 | || !NILP (Vexecuting_macro); | |
cb5df6ae | 1035 | if (internal_self_insert (XINT (c), 0)) |
284f4730 JB |
1036 | { |
1037 | lose = 1; | |
1038 | nonundocount = 0; | |
1039 | } | |
1040 | if (!lose && | |
1041 | (point == ZV || FETCH_CHAR (point) == '\n')) | |
1042 | { | |
1043 | struct Lisp_Vector *dp | |
1044 | = window_display_table (XWINDOW (selected_window)); | |
1045 | ||
1046 | if (dp == 0 || XTYPE (dp->contents[c]) != Lisp_String) | |
cb5df6ae | 1047 | no_redisplay = direct_output_for_insert (XINT (c)); |
284f4730 JB |
1048 | else if (XSTRING (dp->contents[c])->size |
1049 | == sizeof (GLYPH)) | |
1050 | no_redisplay = | |
1051 | direct_output_for_insert (*(GLYPH *)XSTRING (dp->contents[c])->data); | |
1052 | } | |
1053 | goto directly_done; | |
1054 | } | |
1055 | } | |
1056 | ||
1057 | /* Here for a command that isn't executed directly */ | |
1058 | ||
1059 | nonundocount = 0; | |
1060 | if (NILP (Vprefix_arg)) | |
1061 | Fundo_boundary (); | |
1062 | Fcommand_execute (cmd, Qnil); | |
1063 | ||
284f4730 | 1064 | } |
a764a753 | 1065 | directly_done: ; |
284f4730 | 1066 | |
86e5706b RS |
1067 | if (!NILP (Vpost_command_hook)) |
1068 | call1 (Vrun_hooks, Qpost_command_hook); | |
1069 | ||
284f4730 JB |
1070 | /* If there is a prefix argument, |
1071 | 1) We don't want last_command to be ``universal-argument'' | |
1072 | (that would be dumb), so don't set last_command, | |
1073 | 2) we want to leave echoing on so that the prefix will be | |
1074 | echoed as part of this key sequence, so don't call | |
1075 | cancel_echoing, and | |
1076 | 3) we want to leave this_command_key_count non-zero, so that | |
1077 | read_char will realize that it is re-reading a character, and | |
1078 | not echo it a second time. */ | |
1079 | if (NILP (Vprefix_arg)) | |
1080 | { | |
1081 | last_command = this_command; | |
1082 | cancel_echoing (); | |
1083 | this_command_key_count = 0; | |
1084 | } | |
86e5706b RS |
1085 | |
1086 | if (!NILP (current_buffer->mark_active)) | |
1087 | { | |
1088 | if (!NILP (Vdeactivate_mark) && !NILP (Vtransient_mark_mode)) | |
1089 | { | |
1090 | current_buffer->mark_active = Qnil; | |
1091 | call1 (Vrun_hooks, intern ("deactivate-mark-hook")); | |
1092 | } | |
1093 | else if (current_buffer != prev_buffer || MODIFF != prev_modiff) | |
1094 | call1 (Vrun_hooks, intern ("activate-mark-hook")); | |
1095 | } | |
284f4730 JB |
1096 | } |
1097 | } | |
1098 | \f | |
1099 | /* Number of seconds between polling for input. */ | |
1100 | int polling_period; | |
1101 | ||
1102 | /* Nonzero means polling for input is temporarily suppresed. */ | |
1103 | int poll_suppress_count; | |
1104 | ||
1105 | #ifdef POLL_FOR_INPUT | |
1106 | int polling_for_input; | |
1107 | ||
1108 | /* Handle an alarm once each second and read pending input | |
1109 | so as to handle a C-g if it comces in. */ | |
1110 | ||
1111 | SIGTYPE | |
1112 | input_poll_signal () | |
1113 | { | |
1114 | #ifdef HAVE_X_WINDOWS | |
1115 | extern int x_input_blocked; | |
1116 | if (x_input_blocked == 0) | |
1117 | #endif | |
1118 | if (!waiting_for_input) | |
1119 | read_avail_input (0); | |
1120 | signal (SIGALRM, input_poll_signal); | |
1121 | alarm (polling_period); | |
1122 | } | |
1123 | ||
1124 | #endif | |
1125 | ||
1126 | /* Begin signals to poll for input, if they are appropriate. | |
1127 | This function is called unconditionally from various places. */ | |
1128 | ||
1129 | start_polling () | |
1130 | { | |
1131 | #ifdef POLL_FOR_INPUT | |
1132 | if (read_socket_hook) | |
1133 | { | |
1134 | poll_suppress_count--; | |
1135 | if (poll_suppress_count == 0) | |
1136 | { | |
1137 | signal (SIGALRM, input_poll_signal); | |
1138 | polling_for_input = 1; | |
1139 | alarm (polling_period); | |
1140 | } | |
1141 | } | |
1142 | #endif | |
1143 | } | |
1144 | ||
1145 | /* Turn off polling. */ | |
1146 | ||
1147 | stop_polling () | |
1148 | { | |
1149 | #ifdef POLL_FOR_INPUT | |
1150 | if (read_socket_hook) | |
1151 | { | |
1152 | if (poll_suppress_count == 0) | |
1153 | { | |
1154 | polling_for_input = 0; | |
1155 | alarm (0); | |
1156 | } | |
1157 | poll_suppress_count++; | |
1158 | } | |
1159 | #endif | |
1160 | } | |
1161 | \f | |
1162 | /* Input of single characters from keyboard */ | |
1163 | ||
1164 | Lisp_Object print_help (); | |
1165 | static Lisp_Object kbd_buffer_get_event (); | |
1166 | ||
1167 | /* read a character from the keyboard; call the redisplay if needed */ | |
1168 | /* commandflag 0 means do not do auto-saving, but do do redisplay. | |
1169 | -1 means do not do redisplay, but do do autosaving. | |
1170 | 1 means do both. */ | |
1171 | ||
7d6de002 RS |
1172 | /* The arguments MAPS and NMAPS are for menu prompting. |
1173 | MAPS is an array of keymaps; NMAPS is the length of MAPS. | |
1174 | ||
1175 | PREV_EVENT is the previous input event, or nil if we are reading | |
1176 | the first event of a key sequence. | |
1177 | ||
6569cc8d JB |
1178 | If USED_MOUSE_MENU is non-zero, then we set *USED_MOUSE_MENU to 1 |
1179 | if we used a mouse menu to read the input, or zero otherwise. If | |
1180 | USED_MOUSE_MENU is zero, *USED_MOUSE_MENU is left alone. */ | |
7d6de002 | 1181 | |
284f4730 | 1182 | Lisp_Object |
7d6de002 | 1183 | read_char (commandflag, nmaps, maps, prev_event, used_mouse_menu) |
284f4730 | 1184 | int commandflag; |
7d6de002 RS |
1185 | int nmaps; |
1186 | Lisp_Object *maps; | |
1187 | Lisp_Object prev_event; | |
1188 | int *used_mouse_menu; | |
284f4730 JB |
1189 | { |
1190 | register Lisp_Object c; | |
1191 | int count; | |
1192 | jmp_buf save_jump; | |
1193 | ||
dbc4e1c1 | 1194 | if (CONSP (unread_command_events)) |
284f4730 | 1195 | { |
dbc4e1c1 JB |
1196 | c = XCONS (unread_command_events)->car; |
1197 | unread_command_events = XCONS (unread_command_events)->cdr; | |
284f4730 | 1198 | |
284f4730 JB |
1199 | if (this_command_key_count == 0) |
1200 | goto reread_first; | |
1201 | else | |
1202 | goto reread; | |
1203 | } | |
1204 | ||
86e5706b RS |
1205 | if (unread_command_char != -1) |
1206 | { | |
1207 | XSET (c, Lisp_Int, unread_command_char); | |
1208 | unread_command_char = -1; | |
1209 | ||
1210 | if (this_command_key_count == 0) | |
1211 | goto reread_first; | |
1212 | else | |
1213 | goto reread; | |
1214 | } | |
1215 | ||
284f4730 JB |
1216 | if (!NILP (Vexecuting_macro)) |
1217 | { | |
07d2b8de | 1218 | #ifdef MULTI_FRAME |
fce33686 JB |
1219 | /* We set this to Qmacro; since that's not a frame, nobody will |
1220 | try to switch frames on us, and the selected window will | |
1221 | remain unchanged. | |
1222 | ||
1223 | Since this event came from a macro, it would be misleading to | |
3c370943 JB |
1224 | leave internal_last_event_frame set to whereever the last |
1225 | real event came from. Normally, a switch-frame event selects | |
1226 | internal_last_event_frame after each command is read, but | |
1227 | events read from a macro should never cause a new frame to be | |
1228 | selected. */ | |
1229 | Vlast_event_frame = internal_last_event_frame = Qmacro; | |
07d2b8de | 1230 | #endif |
fce33686 | 1231 | |
f4255cd1 | 1232 | if (executing_macro_index >= XFASTINT (Flength (Vexecuting_macro))) |
284f4730 JB |
1233 | { |
1234 | XSET (c, Lisp_Int, -1); | |
1235 | return c; | |
1236 | } | |
1237 | ||
1238 | c = Faref (Vexecuting_macro, make_number (executing_macro_index)); | |
86e5706b RS |
1239 | if (XTYPE (Vexecuting_macro) == Lisp_String |
1240 | && (XINT (c) & 0x80)) | |
1241 | XFASTINT (c) = CHAR_META | (XINT (c) & ~0x80); | |
1242 | ||
284f4730 JB |
1243 | executing_macro_index++; |
1244 | ||
1245 | goto from_macro; | |
1246 | } | |
1247 | ||
cd21b839 JB |
1248 | if (!NILP (unread_switch_frame)) |
1249 | { | |
1250 | c = unread_switch_frame; | |
1251 | unread_switch_frame = Qnil; | |
1252 | ||
1253 | /* This event should make it into this_command_keys, and get echoed | |
f4255cd1 JB |
1254 | again, so we go to reread_first, rather than reread. */ |
1255 | goto reread_first; | |
cd21b839 JB |
1256 | } |
1257 | ||
284f4730 | 1258 | /* Save outer setjmp data, in case called recursively. */ |
f76475ad | 1259 | save_getcjmp (save_jump); |
284f4730 JB |
1260 | |
1261 | stop_polling (); | |
1262 | ||
1263 | if (commandflag >= 0 && !input_pending && !detect_input_pending ()) | |
1264 | redisplay (); | |
1265 | ||
1266 | if (_setjmp (getcjmp)) | |
1267 | { | |
1268 | XSET (c, Lisp_Int, quit_char); | |
07d2b8de | 1269 | #ifdef MULTI_FRAME |
3c370943 JB |
1270 | XSET (internal_last_event_frame, Lisp_Frame, selected_frame); |
1271 | Vlast_event_frame = internal_last_event_frame; | |
07d2b8de | 1272 | #endif |
284f4730 | 1273 | |
284f4730 JB |
1274 | goto non_reread; |
1275 | } | |
1276 | ||
1277 | /* Message turns off echoing unless more keystrokes turn it on again. */ | |
1278 | if (echo_area_glyphs && *echo_area_glyphs && echo_area_glyphs != echobuf) | |
1279 | cancel_echoing (); | |
1280 | else | |
1281 | /* If already echoing, continue. */ | |
1282 | echo_dash (); | |
1283 | ||
1284 | /* If in middle of key sequence and minibuffer not active, | |
1285 | start echoing if enough time elapses. */ | |
1286 | if (minibuf_level == 0 && !immediate_echo && this_command_key_count > 0 | |
1287 | && echo_keystrokes > 0 | |
1288 | && (echo_area_glyphs == 0 || *echo_area_glyphs == 0)) | |
1289 | { | |
1290 | Lisp_Object tem0; | |
1291 | ||
7d6de002 RS |
1292 | /* After a mouse event, start echoing right away. |
1293 | This is because we are probably about to display a menu, | |
1294 | and we don't want to delay before doing so. */ | |
dbc4e1c1 | 1295 | if (EVENT_HAS_PARAMETERS (prev_event)) |
284f4730 | 1296 | echo (); |
7d6de002 RS |
1297 | else |
1298 | { | |
1299 | tem0 = sit_for (echo_keystrokes, 0, 1, 1); | |
1300 | if (EQ (tem0, Qt)) | |
1301 | echo (); | |
1302 | } | |
284f4730 JB |
1303 | } |
1304 | ||
1305 | /* Maybe auto save due to number of keystrokes or idle time. */ | |
1306 | ||
1307 | if (commandflag != 0 | |
1308 | && auto_save_interval > 0 | |
51172b6d | 1309 | && num_nonmacro_input_chars - last_auto_save > max (auto_save_interval, 20) |
284f4730 JB |
1310 | && !detect_input_pending ()) |
1311 | { | |
1312 | jmp_buf temp; | |
1313 | save_getcjmp (temp); | |
1314 | Fdo_auto_save (Qnil, Qnil); | |
1315 | restore_getcjmp (temp); | |
1316 | } | |
1317 | ||
7d6de002 RS |
1318 | /* Try reading a character via menu prompting. |
1319 | Try this before the sit-for, because the sit-for | |
1320 | would do the wrong thing if we are supposed to do | |
1321 | menu prompting. */ | |
1322 | c = Qnil; | |
1323 | if (INTERACTIVE && !NILP (prev_event)) | |
1324 | c = read_char_menu_prompt (nmaps, maps, prev_event, used_mouse_menu); | |
1325 | ||
284f4730 JB |
1326 | /* Slow down auto saves logarithmically in size of current buffer, |
1327 | and garbage collect while we're at it. */ | |
7d6de002 RS |
1328 | if (NILP (c)) |
1329 | { | |
1330 | int delay_level, buffer_size; | |
1331 | ||
1332 | if (! MINI_WINDOW_P (XWINDOW (selected_window))) | |
1333 | last_non_minibuf_size = Z - BEG; | |
1334 | buffer_size = (last_non_minibuf_size >> 8) + 1; | |
1335 | delay_level = 0; | |
1336 | while (buffer_size > 64) | |
1337 | delay_level++, buffer_size -= buffer_size >> 2; | |
1338 | if (delay_level < 4) delay_level = 4; | |
1339 | /* delay_level is 4 for files under around 50k, 7 at 100k, | |
1340 | 9 at 200k, 11 at 300k, and 12 at 500k. It is 15 at 1 meg. */ | |
1341 | ||
1342 | /* Auto save if enough time goes by without input. */ | |
1343 | if (commandflag != 0 | |
51172b6d | 1344 | && num_nonmacro_input_chars > last_auto_save |
7d6de002 RS |
1345 | && XTYPE (Vauto_save_timeout) == Lisp_Int |
1346 | && XINT (Vauto_save_timeout) > 0) | |
1347 | { | |
1348 | Lisp_Object tem0; | |
1349 | int delay = delay_level * XFASTINT (Vauto_save_timeout) / 4; | |
1350 | tem0 = sit_for (delay, 0, 1, 1); | |
1351 | if (EQ (tem0, Qt)) | |
1352 | { | |
1353 | jmp_buf temp; | |
1354 | save_getcjmp (temp); | |
1355 | Fdo_auto_save (Qnil, Qnil); | |
1356 | restore_getcjmp (temp); | |
1357 | ||
1358 | /* If we have auto-saved and there is still no input | |
1359 | available, garbage collect if there has been enough | |
1360 | consing going on to make it worthwhile. */ | |
1361 | if (!detect_input_pending () | |
1362 | && consing_since_gc > gc_cons_threshold / 2) | |
1363 | Fgarbage_collect (); | |
1364 | } | |
1365 | } | |
1366 | } | |
284f4730 JB |
1367 | |
1368 | /* Actually read a character, waiting if necessary. */ | |
7d6de002 RS |
1369 | if (NILP (c)) |
1370 | c = kbd_buffer_get_event (); | |
284f4730 JB |
1371 | |
1372 | if (NILP (c)) | |
1373 | abort (); /* Don't think this can happen. */ | |
1374 | ||
284f4730 | 1375 | /* Terminate Emacs in batch mode if at eof. */ |
7d6de002 | 1376 | if (noninteractive && XTYPE (c) == Lisp_Int && XINT (c) < 0) |
284f4730 JB |
1377 | Fkill_emacs (make_number (1)); |
1378 | ||
9fa4395d RS |
1379 | /* Test for ControlMask and Mod1Mask. */ |
1380 | if (extra_keyboard_modifiers & 4) | |
1381 | c &= ~0140; | |
1382 | if (extra_keyboard_modifiers & 8) | |
1383 | c |= 0200; | |
1384 | ||
284f4730 JB |
1385 | non_reread: |
1386 | ||
f76475ad | 1387 | restore_getcjmp (save_jump); |
284f4730 JB |
1388 | |
1389 | start_polling (); | |
1390 | ||
1391 | echo_area_glyphs = 0; | |
1392 | ||
1393 | /* Handle things that only apply to characters. */ | |
1394 | if (XTYPE (c) == Lisp_Int) | |
1395 | { | |
1396 | /* If kbd_buffer_get_event gave us an EOF, return that. */ | |
86e5706b | 1397 | if (XINT (c) == -1) |
284f4730 JB |
1398 | return c; |
1399 | ||
284f4730 | 1400 | if (XTYPE (Vkeyboard_translate_table) == Lisp_String |
f4255cd1 JB |
1401 | && XSTRING (Vkeyboard_translate_table)->size > XFASTINT (c)) |
1402 | XSETINT (c, XSTRING (Vkeyboard_translate_table)->data[XFASTINT (c)]); | |
284f4730 JB |
1403 | } |
1404 | ||
1405 | total_keys++; | |
5160df46 JB |
1406 | XVECTOR (recent_keys)->contents[recent_keys_index] = c; |
1407 | if (++recent_keys_index >= NUM_RECENT_KEYS) | |
284f4730 JB |
1408 | recent_keys_index = 0; |
1409 | ||
1410 | /* Write c to the dribble file. If c is a lispy event, write | |
1411 | the event's symbol to the dribble file, in <brackets>. Bleaugh. | |
1412 | If you, dear reader, have a better idea, you've got the source. :-) */ | |
1413 | if (dribble) | |
1414 | { | |
1415 | if (XTYPE (c) == Lisp_Int) | |
f4255cd1 | 1416 | putc (XINT (c), dribble); |
284f4730 JB |
1417 | else |
1418 | { | |
1419 | Lisp_Object dribblee = c; | |
1420 | ||
1421 | /* If it's a structured event, take the event header. */ | |
88cb0656 | 1422 | dribblee = EVENT_HEAD (dribblee); |
284f4730 | 1423 | |
8f805655 | 1424 | if (XTYPE (dribblee) == Lisp_Symbol) |
284f4730 JB |
1425 | { |
1426 | putc ('<', dribble); | |
8f805655 JB |
1427 | fwrite (XSYMBOL (dribblee)->name->data, sizeof (char), |
1428 | XSYMBOL (dribblee)->name->size, | |
284f4730 JB |
1429 | dribble); |
1430 | putc ('>', dribble); | |
1431 | } | |
1432 | } | |
1433 | ||
1434 | fflush (dribble); | |
1435 | } | |
1436 | ||
1437 | store_kbd_macro_char (c); | |
1438 | ||
51172b6d RS |
1439 | num_nonmacro_input_chars++; |
1440 | ||
284f4730 JB |
1441 | from_macro: |
1442 | reread_first: | |
284f4730 | 1443 | |
4bb994d1 JB |
1444 | /* Record this character as part of the current key. |
1445 | Don't record mouse motion; it should never matter. */ | |
1446 | if (! (EVENT_HAS_PARAMETERS (c) | |
1447 | && EQ (EVENT_HEAD_KIND (EVENT_HEAD (c)), Qmouse_movement))) | |
7b4aedb9 JB |
1448 | { |
1449 | echo_char (c); | |
1450 | add_command_key (c); | |
1451 | } | |
284f4730 JB |
1452 | |
1453 | /* Re-reading in the middle of a command */ | |
1454 | reread: | |
1455 | last_input_char = c; | |
1456 | num_input_chars++; | |
1457 | ||
1458 | /* Process the help character specially if enabled */ | |
1459 | if (EQ (c, help_char) && !NILP (Vhelp_form)) | |
1460 | { | |
1461 | Lisp_Object tem0; | |
1462 | count = specpdl_ptr - specpdl; | |
1463 | ||
1464 | record_unwind_protect (Fset_window_configuration, | |
1465 | Fcurrent_window_configuration (Qnil)); | |
1466 | ||
1467 | tem0 = Feval (Vhelp_form); | |
1468 | if (XTYPE (tem0) == Lisp_String) | |
1469 | internal_with_output_to_temp_buffer ("*Help*", print_help, tem0); | |
1470 | ||
1471 | cancel_echoing (); | |
6569cc8d | 1472 | c = read_char (0, 0, 0, Qnil, 0); |
ff11dfa1 | 1473 | /* Remove the help from the frame */ |
284f4730 JB |
1474 | unbind_to (count, Qnil); |
1475 | redisplay (); | |
1476 | if (EQ (c, make_number (040))) | |
1477 | { | |
1478 | cancel_echoing (); | |
7d6de002 | 1479 | c = read_char (0, 0, 0, Qnil, 0); |
284f4730 JB |
1480 | } |
1481 | } | |
1482 | ||
1483 | return c; | |
1484 | } | |
1485 | ||
1486 | Lisp_Object | |
1487 | print_help (object) | |
1488 | Lisp_Object object; | |
1489 | { | |
1490 | Fprinc (object, Qnil); | |
1491 | return Qnil; | |
1492 | } | |
1493 | ||
1494 | /* Copy out or in the info on where C-g should throw to. | |
1495 | This is used when running Lisp code from within get_char, | |
1496 | in case get_char is called recursively. | |
1497 | See read_process_output. */ | |
1498 | ||
1499 | save_getcjmp (temp) | |
1500 | jmp_buf temp; | |
1501 | { | |
1502 | bcopy (getcjmp, temp, sizeof getcjmp); | |
1503 | } | |
1504 | ||
1505 | restore_getcjmp (temp) | |
1506 | jmp_buf temp; | |
1507 | { | |
1508 | bcopy (temp, getcjmp, sizeof getcjmp); | |
1509 | } | |
1510 | ||
1511 | \f | |
1512 | /* Low level keyboard/mouse input. | |
1513 | kbd_buffer_store_event places events in kbd_buffer, and | |
1514 | kbd_buffer_get_event retrieves them. | |
1515 | mouse_moved indicates when the mouse has moved again, and | |
1516 | *mouse_position_hook provides the mouse position. */ | |
1517 | ||
1518 | /* Set this for debugging, to have a way to get out */ | |
1519 | int stop_character; | |
1520 | ||
ff11dfa1 | 1521 | extern int frame_garbaged; |
284f4730 JB |
1522 | |
1523 | /* Return true iff there are any events in the queue that read-char | |
1524 | would return. If this returns false, a read-char would block. */ | |
1525 | static int | |
1526 | readable_events () | |
1527 | { | |
88cb0656 | 1528 | return ! EVENT_QUEUES_EMPTY; |
284f4730 JB |
1529 | } |
1530 | ||
1531 | ||
1532 | /* Restore mouse tracking enablement. See Ftrack_mouse for the only use | |
1533 | of this function. */ | |
1534 | static Lisp_Object | |
1535 | tracking_off (old_value) | |
1536 | Lisp_Object old_value; | |
1537 | { | |
1538 | if (! XFASTINT (old_value)) | |
1539 | { | |
1540 | do_mouse_tracking = 0; | |
1541 | ||
1542 | /* Redisplay may have been preempted because there was input | |
1543 | available, and it assumes it will be called again after the | |
1544 | input has been processed. If the only input available was | |
1545 | the sort that we have just disabled, then we need to call | |
1546 | redisplay. */ | |
1547 | if (!readable_events ()) | |
1548 | { | |
1549 | redisplay_preserve_echo_area (); | |
1550 | get_input_pending (&input_pending); | |
1551 | } | |
1552 | } | |
1553 | } | |
1554 | ||
1555 | DEFUN ("track-mouse", Ftrack_mouse, Strack_mouse, 0, UNEVALLED, 0, | |
4bb994d1 JB |
1556 | "Evaluate BODY with mouse movement events enabled.\n\ |
1557 | Within a `track-mouse' form, mouse motion generates input events that\n\ | |
1558 | you can read with `read-event'.\n\ | |
1559 | Normally, mouse motion is ignored.") | |
284f4730 JB |
1560 | (args) |
1561 | Lisp_Object args; | |
1562 | { | |
1563 | int count = specpdl_ptr - specpdl; | |
1564 | Lisp_Object val; | |
1565 | ||
1566 | XSET (val, Lisp_Int, do_mouse_tracking); | |
1567 | record_unwind_protect (tracking_off, val); | |
1568 | ||
1569 | do_mouse_tracking = 1; | |
1570 | ||
1571 | val = Fprogn (args); | |
1572 | return unbind_to (count, val); | |
1573 | } | |
1574 | ||
1575 | /* Store an event obtained at interrupt level into kbd_buffer, fifo */ | |
1576 | ||
1577 | void | |
1578 | kbd_buffer_store_event (event) | |
1579 | register struct input_event *event; | |
1580 | { | |
1581 | if (event->kind == no_event) | |
1582 | abort (); | |
1583 | ||
1584 | if (event->kind == ascii_keystroke) | |
1585 | { | |
1586 | register int c = XFASTINT (event->code) & 0377; | |
1587 | ||
86e5706b | 1588 | if (c == quit_char) |
284f4730 | 1589 | { |
3e51c7b7 JB |
1590 | extern SIGTYPE interrupt_signal (); |
1591 | ||
07d2b8de | 1592 | #ifdef MULTI_FRAME |
284f4730 | 1593 | /* If this results in a quit_char being returned to Emacs as |
3c370943 | 1594 | input, set Vlast_event_frame properly. If this doesn't |
284f4730 | 1595 | get returned to Emacs as an event, the next event read |
ff11dfa1 | 1596 | will set Vlast_event_frame again, so this is safe to do. */ |
4bb994d1 | 1597 | { |
7b4aedb9 JB |
1598 | Lisp_Object focus = |
1599 | FRAME_FOCUS_FRAME (XFRAME (event->frame_or_window)); | |
4bb994d1 JB |
1600 | |
1601 | if (NILP (focus)) | |
3c370943 | 1602 | internal_last_event_frame = event->frame_or_window; |
4bb994d1 | 1603 | else |
3c370943 JB |
1604 | internal_last_event_frame = focus; |
1605 | Vlast_event_frame = internal_last_event_frame; | |
4bb994d1 | 1606 | } |
07d2b8de | 1607 | #endif |
3e51c7b7 | 1608 | |
ffd56f97 | 1609 | last_event_timestamp = event->timestamp; |
284f4730 JB |
1610 | interrupt_signal (); |
1611 | return; | |
1612 | } | |
1613 | ||
1614 | if (c && c == stop_character) | |
1615 | { | |
1616 | sys_suspend (); | |
1617 | return; | |
1618 | } | |
1619 | ||
1620 | XSET (event->code, Lisp_Int, c); | |
1621 | } | |
1622 | ||
1623 | if (kbd_store_ptr - kbd_buffer == KBD_BUFFER_SIZE) | |
1624 | kbd_store_ptr = kbd_buffer; | |
1625 | ||
1626 | /* Don't let the very last slot in the buffer become full, | |
1627 | since that would make the two pointers equal, | |
1628 | and that is indistinguishable from an empty buffer. | |
1629 | Discard the event if it would fill the last slot. */ | |
1630 | if (kbd_fetch_ptr - 1 != kbd_store_ptr) | |
1631 | { | |
1632 | kbd_store_ptr->kind = event->kind; | |
1633 | kbd_store_ptr->code = event->code; | |
1634 | kbd_store_ptr->part = event->part; | |
7b4aedb9 | 1635 | kbd_store_ptr->frame_or_window = event->frame_or_window; |
284f4730 JB |
1636 | kbd_store_ptr->modifiers = event->modifiers; |
1637 | kbd_store_ptr->x = event->x; | |
1638 | kbd_store_ptr->y = event->y; | |
1639 | kbd_store_ptr->timestamp = event->timestamp; | |
7b4aedb9 JB |
1640 | (XVECTOR (kbd_buffer_frame_or_window)->contents[kbd_store_ptr |
1641 | - kbd_buffer] | |
1642 | = event->frame_or_window); | |
284f4730 JB |
1643 | |
1644 | kbd_store_ptr++; | |
1645 | } | |
1646 | } | |
1647 | ||
1648 | static Lisp_Object make_lispy_event (); | |
1649 | static Lisp_Object make_lispy_movement (); | |
1650 | static Lisp_Object modify_event_symbol (); | |
cd21b839 | 1651 | static Lisp_Object make_lispy_switch_frame (); |
284f4730 JB |
1652 | |
1653 | static Lisp_Object | |
1654 | kbd_buffer_get_event () | |
1655 | { | |
1656 | register int c; | |
1657 | Lisp_Object obj; | |
1658 | ||
1659 | if (noninteractive) | |
1660 | { | |
1661 | c = getchar (); | |
1662 | XSET (obj, Lisp_Int, c); | |
1663 | return obj; | |
1664 | } | |
1665 | ||
1666 | /* Wait until there is input available. */ | |
1667 | for (;;) | |
1668 | { | |
284f4730 JB |
1669 | if (!EVENT_QUEUES_EMPTY) |
1670 | break; | |
1671 | ||
1672 | /* If the quit flag is set, then read_char will return | |
1673 | quit_char, so that counts as "available input." */ | |
1674 | if (!NILP (Vquit_flag)) | |
1675 | quit_throw_to_read_char (); | |
1676 | ||
1677 | /* One way or another, wait until input is available; then, if | |
1678 | interrupt handlers have not read it, read it now. */ | |
1679 | ||
1680 | #ifdef OLDVMS | |
1681 | wait_for_kbd_input (); | |
1682 | #else | |
1683 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
1684 | #ifdef SIGIO | |
1685 | gobble_input (0); | |
1686 | #endif /* SIGIO */ | |
1687 | if (EVENT_QUEUES_EMPTY) | |
1688 | { | |
f76475ad JB |
1689 | Lisp_Object minus_one; |
1690 | ||
1691 | XSET (minus_one, Lisp_Int, -1); | |
1692 | wait_reading_process_input (0, 0, minus_one, 1); | |
284f4730 JB |
1693 | |
1694 | if (!interrupt_input && EVENT_QUEUES_EMPTY) | |
1695 | { | |
1696 | read_avail_input (0); | |
1697 | } | |
1698 | } | |
1699 | #endif /* not VMS */ | |
1700 | } | |
1701 | ||
1702 | /* At this point, we know that there is a readable event available | |
1703 | somewhere. If the event queue is empty, then there must be a | |
1704 | mouse movement enabled and available. */ | |
1705 | if (kbd_fetch_ptr != kbd_store_ptr) | |
1706 | { | |
cd21b839 | 1707 | struct input_event *event; |
3e51c7b7 | 1708 | |
856bf263 | 1709 | event = ((kbd_fetch_ptr < kbd_buffer + KBD_BUFFER_SIZE) |
cd21b839 JB |
1710 | ? kbd_fetch_ptr |
1711 | : kbd_buffer); | |
3e51c7b7 | 1712 | |
cd21b839 | 1713 | last_event_timestamp = event->timestamp; |
cd21b839 | 1714 | |
4bb994d1 JB |
1715 | obj = Qnil; |
1716 | ||
07d2b8de | 1717 | #ifdef MULTI_FRAME |
4bb994d1 JB |
1718 | /* If this event is on a different frame, return a switch-frame this |
1719 | time, and leave the event in the queue for next time. */ | |
1720 | { | |
7b4aedb9 JB |
1721 | Lisp_Object frame = event->frame_or_window; |
1722 | Lisp_Object focus; | |
1723 | ||
1724 | if (XTYPE (frame) == Lisp_Window) | |
1725 | frame = WINDOW_FRAME (XWINDOW (frame)); | |
4bb994d1 | 1726 | |
7b4aedb9 JB |
1727 | focus = FRAME_FOCUS_FRAME (XFRAME (frame)); |
1728 | if (! NILP (focus)) | |
1729 | frame = focus; | |
07d2b8de | 1730 | |
3c370943 | 1731 | if (! EQ (frame, internal_last_event_frame)) |
07d2b8de | 1732 | { |
3c370943 | 1733 | internal_last_event_frame = frame; |
07d2b8de JB |
1734 | obj = make_lispy_switch_frame (frame); |
1735 | } | |
4bb994d1 | 1736 | } |
07d2b8de | 1737 | #endif |
4bb994d1 JB |
1738 | |
1739 | /* If we didn't decide to make a switch-frame event, go ahead | |
1740 | and build a real event from the queue entry. */ | |
1741 | if (NILP (obj)) | |
1742 | { | |
1743 | obj = make_lispy_event (event); | |
cd21b839 | 1744 | |
4bb994d1 JB |
1745 | /* Wipe out this event, to catch bugs. */ |
1746 | event->kind = no_event; | |
7b4aedb9 JB |
1747 | (XVECTOR (kbd_buffer_frame_or_window)->contents[event - kbd_buffer] |
1748 | = Qnil); | |
cd21b839 | 1749 | |
4bb994d1 JB |
1750 | kbd_fetch_ptr = event + 1; |
1751 | } | |
284f4730 JB |
1752 | } |
1753 | else if (do_mouse_tracking && mouse_moved) | |
1754 | { | |
4bb994d1 | 1755 | FRAME_PTR f; |
7b4aedb9 | 1756 | Lisp_Object bar_window; |
3c370943 | 1757 | enum scroll_bar_part part; |
e5d77022 JB |
1758 | Lisp_Object x, y; |
1759 | unsigned long time; | |
284f4730 | 1760 | |
7b4aedb9 | 1761 | (*mouse_position_hook) (&f, &bar_window, &part, &x, &y, &time); |
4bb994d1 JB |
1762 | |
1763 | obj = Qnil; | |
284f4730 | 1764 | |
07d2b8de | 1765 | #ifdef MULTI_FRAME |
4bb994d1 JB |
1766 | /* Decide if we should generate a switch-frame event. Don't |
1767 | generate switch-frame events for motion outside of all Emacs | |
1768 | frames. */ | |
1769 | if (f) | |
cd21b839 | 1770 | { |
4bb994d1 JB |
1771 | Lisp_Object frame = FRAME_FOCUS_FRAME (f); |
1772 | ||
1773 | if (NILP (frame)) | |
1774 | XSET (frame, Lisp_Frame, f); | |
1775 | ||
3c370943 | 1776 | if (! EQ (frame, internal_last_event_frame)) |
4bb994d1 | 1777 | { |
3c370943 JB |
1778 | XSET (internal_last_event_frame, Lisp_Frame, frame); |
1779 | obj = make_lispy_switch_frame (internal_last_event_frame); | |
4bb994d1 | 1780 | } |
cd21b839 | 1781 | } |
07d2b8de | 1782 | #endif |
4bb994d1 JB |
1783 | |
1784 | /* If we didn't decide to make a switch-frame event, go ahead and | |
1785 | return a mouse-motion event. */ | |
1786 | if (NILP (obj)) | |
7b4aedb9 | 1787 | obj = make_lispy_movement (f, bar_window, part, x, y, time); |
4bb994d1 | 1788 | } |
284f4730 JB |
1789 | else |
1790 | /* We were promised by the above while loop that there was | |
1791 | something for us to read! */ | |
1792 | abort (); | |
1793 | ||
1794 | input_pending = readable_events (); | |
1795 | ||
3c370943 JB |
1796 | #ifdef MULTI_FRAME |
1797 | Vlast_event_frame = internal_last_event_frame; | |
1798 | #endif | |
1799 | ||
284f4730 JB |
1800 | return (obj); |
1801 | } | |
1802 | ||
4bb994d1 | 1803 | |
284f4730 JB |
1804 | /* Caches for modify_event_symbol. */ |
1805 | static Lisp_Object func_key_syms; | |
1806 | static Lisp_Object mouse_syms; | |
1807 | ||
1808 | /* You'll notice that this table is arranged to be conveniently | |
1809 | indexed by X Windows keysym values. */ | |
1810 | static char *lispy_function_keys[] = | |
1811 | { | |
1812 | /* X Keysym value */ | |
1813 | ||
86e5706b RS |
1814 | 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff00 */ |
1815 | "backspace", | |
1816 | "tab", | |
1817 | "linefeed", | |
1818 | "clear", | |
1819 | 0, | |
1820 | "return", | |
1821 | 0, 0, | |
1822 | 0, 0, 0, /* 0xff10 */ | |
1823 | "pause", | |
1824 | 0, 0, 0, 0, 0, 0, 0, | |
1825 | "escape", | |
1826 | 0, 0, 0, 0, | |
1827 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff20...2f */ | |
1828 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff30...3f */ | |
1829 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff40...4f */ | |
1830 | ||
284f4730 JB |
1831 | "home", /* 0xff50 */ /* IsCursorKey */ |
1832 | "left", | |
1833 | "up", | |
1834 | "right", | |
1835 | "down", | |
1836 | "prior", | |
1837 | "next", | |
1838 | "end", | |
1839 | "begin", | |
1840 | 0, /* 0xff59 */ | |
1841 | 0, 0, 0, 0, 0, 0, | |
1842 | "select", /* 0xff60 */ /* IsMiscFunctionKey */ | |
1843 | "print", | |
1844 | "execute", | |
1845 | "insert", | |
1846 | 0, /* 0xff64 */ | |
1847 | "undo", | |
1848 | "redo", | |
1849 | "menu", | |
1850 | "find", | |
1851 | "cancel", | |
1852 | "help", | |
1853 | "break", /* 0xff6b */ | |
1854 | ||
1855 | /* Here are some keys found mostly on HP keyboards. The X event | |
1856 | handling code will strip bit 29, which flags vendor-specific | |
1857 | keysyms. */ | |
1858 | "reset", /* 0x1000ff6c */ | |
1859 | "system", | |
1860 | "user", | |
1861 | "clearline", | |
1862 | "insertline", | |
1863 | "deleteline", | |
1864 | "insertchar", | |
1865 | "deletechar", | |
1866 | "backtab", | |
1867 | "kp_backtab", /* 0x1000ff75 */ | |
1868 | 0, /* 0xff76 */ | |
1869 | 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff7f */ | |
1870 | "kp-space", /* 0xff80 */ /* IsKeypadKey */ | |
1871 | 0, 0, 0, 0, 0, 0, 0, 0, | |
1872 | "kp-tab", /* 0xff89 */ | |
1873 | 0, 0, 0, | |
1874 | "kp-enter", /* 0xff8d */ | |
1875 | 0, 0, 0, | |
1876 | "kp-f1", /* 0xff91 */ | |
1877 | "kp-f2", | |
1878 | "kp-f3", | |
1879 | "kp-f4", | |
1880 | 0, /* 0xff95 */ | |
1881 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
1882 | "kp-multiply", /* 0xffaa */ | |
1883 | "kp-add", | |
1884 | "kp-separator", | |
1885 | "kp-subtract", | |
1886 | "kp-decimal", | |
1887 | "kp-divide", /* 0xffaf */ | |
1888 | "kp-0", /* 0xffb0 */ | |
1889 | "kp-1", "kp-2", "kp-3", "kp-4", "kp-5", "kp-6", "kp-7", "kp-8", "kp-9", | |
1890 | 0, /* 0xffba */ | |
1891 | 0, 0, | |
1892 | "kp-equal", /* 0xffbd */ | |
1893 | "f1", /* 0xffbe */ /* IsFunctionKey */ | |
86e5706b RS |
1894 | "f2", |
1895 | "f3", "f4", "f5", "f6", "f7", "f8", "f9", "f10", /* 0xffc0 */ | |
1896 | "f11", "f12", "f13", "f14", "f15", "f16", "f17", "f18", | |
1897 | "f19", "f20", "f21", "f22", "f23", "f24", "f25", "f26", /* 0xffd0 */ | |
1898 | "f27", "f28", "f29", "f30", "f31", "f32", "f33", "f34", | |
1899 | "f35", 0, 0, 0, 0, 0, 0, 0, /* 0xffe0 */ | |
1900 | 0, 0, 0, 0, 0, 0, 0, 0, | |
1901 | 0, 0, 0, 0, 0, 0, 0, 0, /* 0xfff0 */ | |
1902 | 0, 0, 0, 0, 0, 0, 0, "delete" | |
284f4730 JB |
1903 | }; |
1904 | ||
1905 | static char *lispy_mouse_names[] = | |
1906 | { | |
1907 | "mouse-1", "mouse-2", "mouse-3", "mouse-4", "mouse-5" | |
1908 | }; | |
1909 | ||
3c370943 | 1910 | /* Scroll bar parts. */ |
4bb994d1 JB |
1911 | Lisp_Object Qabove_handle, Qhandle, Qbelow_handle; |
1912 | ||
3c370943 JB |
1913 | /* An array of scroll bar parts, indexed by an enum scroll_bar_part value. */ |
1914 | Lisp_Object *scroll_bar_parts[] = { | |
4bb994d1 JB |
1915 | &Qabove_handle, &Qhandle, &Qbelow_handle |
1916 | }; | |
1917 | ||
1918 | ||
7b4aedb9 | 1919 | /* A vector, indexed by button number, giving the down-going location |
3c370943 | 1920 | of currently depressed buttons, both scroll bar and non-scroll bar. |
7b4aedb9 JB |
1921 | |
1922 | The elements have the form | |
1923 | (BUTTON-NUMBER MODIFIER-MASK . REST) | |
1924 | where REST is the cdr of a position as it would be reported in the event. | |
1925 | ||
1926 | The make_lispy_event function stores positions here to tell the | |
1927 | difference between click and drag events, and to store the starting | |
1928 | location to be included in drag events. */ | |
1929 | ||
1930 | static Lisp_Object button_down_location; | |
88cb0656 | 1931 | |
284f4730 JB |
1932 | /* Given a struct input_event, build the lisp event which represents |
1933 | it. If EVENT is 0, build a mouse movement event from the mouse | |
88cb0656 JB |
1934 | movement buffer, which should have a movement event in it. |
1935 | ||
1936 | Note that events must be passed to this function in the order they | |
1937 | are received; this function stores the location of button presses | |
1938 | in order to build drag events when the button is released. */ | |
284f4730 JB |
1939 | |
1940 | static Lisp_Object | |
1941 | make_lispy_event (event) | |
1942 | struct input_event *event; | |
1943 | { | |
1944 | #ifdef SWITCH_ENUM_BUG | |
1945 | switch ((int) event->kind) | |
1946 | #else | |
1947 | switch (event->kind) | |
1948 | #endif | |
1949 | { | |
284f4730 JB |
1950 | /* A simple keystroke. */ |
1951 | case ascii_keystroke: | |
86e5706b RS |
1952 | { |
1953 | int c = XFASTINT (event->code); | |
1954 | /* Include the bits for control and shift | |
1955 | only if the basic ASCII code can't indicate them. */ | |
1956 | if ((event->modifiers & ctrl_modifier) | |
1957 | && c >= 040) | |
1958 | c |= ctrl_modifier; | |
1959 | if (XFASTINT (event->code) < 040 | |
1960 | && (event->modifiers & shift_modifier)) | |
1961 | c |= shift_modifier; | |
1962 | c |= (event->modifiers | |
1963 | & (meta_modifier | alt_modifier | |
1964 | | hyper_modifier | super_modifier)); | |
1965 | return c; | |
1966 | } | |
284f4730 JB |
1967 | |
1968 | /* A function key. The symbol may need to have modifier prefixes | |
1969 | tacked onto it. */ | |
1970 | case non_ascii_keystroke: | |
1971 | return modify_event_symbol (XFASTINT (event->code), event->modifiers, | |
1972 | Qfunction_key, | |
1973 | lispy_function_keys, &func_key_syms, | |
1974 | (sizeof (lispy_function_keys) | |
1975 | / sizeof (lispy_function_keys[0]))); | |
1976 | break; | |
1977 | ||
88cb0656 JB |
1978 | /* A mouse click. Figure out where it is, decide whether it's |
1979 | a press, click or drag, and build the appropriate structure. */ | |
284f4730 | 1980 | case mouse_click: |
3c370943 | 1981 | case scroll_bar_click: |
284f4730 | 1982 | { |
0a7f1fc0 | 1983 | int button = XFASTINT (event->code); |
7b4aedb9 | 1984 | Lisp_Object position; |
dbc4e1c1 JB |
1985 | Lisp_Object *start_pos_ptr; |
1986 | Lisp_Object start_pos; | |
284f4730 | 1987 | |
7b4aedb9 | 1988 | if (button < 0 || button >= NUM_MOUSE_BUTTONS) |
88cb0656 JB |
1989 | abort (); |
1990 | ||
7b4aedb9 JB |
1991 | /* Build the position as appropriate for this mouse click. */ |
1992 | if (event->kind == mouse_click) | |
284f4730 | 1993 | { |
7b4aedb9 JB |
1994 | int part; |
1995 | Lisp_Object window = | |
1996 | window_from_coordinates (XFRAME (event->frame_or_window), | |
1997 | XINT (event->x), XINT (event->y), | |
1998 | &part); | |
1999 | Lisp_Object posn; | |
2000 | ||
2001 | if (XTYPE (window) != Lisp_Window) | |
2002 | posn = Qnil; | |
284f4730 | 2003 | else |
7b4aedb9 | 2004 | { |
dbc4e1c1 JB |
2005 | XSETINT (event->x, |
2006 | (XINT (event->x) - XINT (XWINDOW (window)->left))); | |
2007 | XSETINT (event->y, | |
2008 | (XINT (event->y) - XINT (XWINDOW (window)->top))); | |
2009 | ||
7b4aedb9 JB |
2010 | if (part == 1) |
2011 | posn = Qmode_line; | |
2012 | else if (part == 2) | |
2013 | posn = Qvertical_line; | |
2014 | else | |
dbc4e1c1 JB |
2015 | XSET (posn, Lisp_Int, |
2016 | buffer_posn_from_coords (XWINDOW (window), | |
2017 | XINT (event->x), | |
2018 | XINT (event->y))); | |
7b4aedb9 JB |
2019 | } |
2020 | ||
2021 | position = | |
2022 | Fcons (window, | |
2023 | Fcons (posn, | |
2024 | Fcons (Fcons (event->x, event->y), | |
2025 | Fcons (make_number (event->timestamp), | |
2026 | Qnil)))); | |
284f4730 | 2027 | } |
7b4aedb9 | 2028 | else |
88cb0656 | 2029 | { |
7b4aedb9 JB |
2030 | Lisp_Object window = event->frame_or_window; |
2031 | Lisp_Object portion_whole = Fcons (event->x, event->y); | |
3c370943 | 2032 | Lisp_Object part = *scroll_bar_parts[(int) event->part]; |
7b4aedb9 JB |
2033 | |
2034 | position = | |
2035 | Fcons (window, | |
3c370943 | 2036 | Fcons (Qvertical_scroll_bar, |
7b4aedb9 JB |
2037 | Fcons (portion_whole, |
2038 | Fcons (make_number (event->timestamp), | |
2039 | Fcons (part, | |
2040 | Qnil))))); | |
88cb0656 JB |
2041 | } |
2042 | ||
dbc4e1c1 JB |
2043 | start_pos_ptr = &XVECTOR (button_down_location)->contents[button]; |
2044 | ||
2045 | start_pos = *start_pos_ptr; | |
2046 | *start_pos_ptr = Qnil; | |
7b4aedb9 JB |
2047 | |
2048 | /* If this is a button press, squirrel away the location, so | |
2049 | we can decide later whether it was a click or a drag. */ | |
2050 | if (event->modifiers & down_modifier) | |
dbc4e1c1 | 2051 | *start_pos_ptr = Fcopy_alist (position); |
7b4aedb9 | 2052 | |
88cb0656 | 2053 | /* Now we're releasing a button - check the co-ordinates to |
7b4aedb9 | 2054 | see if this was a click or a drag. */ |
88cb0656 JB |
2055 | else if (event->modifiers & up_modifier) |
2056 | { | |
dbc4e1c1 JB |
2057 | /* Is there a start position stored at all for this |
2058 | button? | |
2059 | ||
2060 | It would be nice if we could assume that if we're | |
2061 | getting a button release, we must therefore have gotten | |
2062 | a button press. Unfortunately, the X menu code thwarts | |
2063 | this assumption, so we'll have to be more robust. We | |
2064 | treat a button release with no stored start position as | |
2065 | a click. */ | |
88cb0656 | 2066 | event->modifiers &= ~up_modifier; |
dbc4e1c1 JB |
2067 | if (XTYPE (start_pos) != Lisp_Cons) |
2068 | event->modifiers |= click_modifier; | |
2069 | else | |
2070 | { | |
2071 | /* The third element of every position should be the (x,y) | |
2072 | pair. */ | |
2073 | Lisp_Object down = Fnth (make_number (2), start_pos); | |
2074 | ||
2075 | event->modifiers |= ((EQ (event->x, XCONS (down)->car) | |
2076 | && EQ (event->y, XCONS (down)->cdr)) | |
2077 | ? click_modifier | |
2078 | : drag_modifier); | |
2079 | } | |
88cb0656 JB |
2080 | } |
2081 | else | |
2082 | /* Every mouse event should either have the down_modifier or | |
7b4aedb9 | 2083 | the up_modifier set. */ |
88cb0656 JB |
2084 | abort (); |
2085 | ||
88cb0656 | 2086 | { |
7b4aedb9 JB |
2087 | /* Get the symbol we should use for the mouse click. */ |
2088 | Lisp_Object head = | |
2089 | modify_event_symbol (button, | |
2090 | event->modifiers, | |
2091 | Qmouse_click, | |
2092 | lispy_mouse_names, &mouse_syms, | |
2093 | (sizeof (lispy_mouse_names) | |
2094 | / sizeof (lispy_mouse_names[0]))); | |
2095 | ||
88cb0656 | 2096 | if (event->modifiers & drag_modifier) |
dbc4e1c1 JB |
2097 | return Fcons (head, |
2098 | Fcons (start_pos, | |
2099 | Fcons (position, | |
2100 | Qnil))); | |
88cb0656 JB |
2101 | else |
2102 | return Fcons (head, | |
7b4aedb9 | 2103 | Fcons (position, |
88cb0656 JB |
2104 | Qnil)); |
2105 | } | |
284f4730 JB |
2106 | } |
2107 | ||
284f4730 JB |
2108 | /* The 'kind' field of the event is something we don't recognize. */ |
2109 | default: | |
2110 | abort(); | |
2111 | } | |
2112 | } | |
2113 | ||
2114 | static Lisp_Object | |
7b4aedb9 | 2115 | make_lispy_movement (frame, bar_window, part, x, y, time) |
ff11dfa1 | 2116 | FRAME_PTR frame; |
7b4aedb9 | 2117 | Lisp_Object bar_window; |
3c370943 | 2118 | enum scroll_bar_part part; |
284f4730 | 2119 | Lisp_Object x, y; |
e5d77022 | 2120 | unsigned long time; |
284f4730 | 2121 | { |
3c370943 | 2122 | /* Is it a scroll bar movement? */ |
7b4aedb9 | 2123 | if (frame && ! NILP (bar_window)) |
4bb994d1 | 2124 | { |
3c370943 | 2125 | Lisp_Object part_sym = *scroll_bar_parts[(int) part]; |
4bb994d1 | 2126 | |
3c370943 | 2127 | return Fcons (Qscroll_bar_movement, |
7b4aedb9 | 2128 | (Fcons (Fcons (bar_window, |
3c370943 | 2129 | Fcons (Qvertical_scroll_bar, |
4bb994d1 JB |
2130 | Fcons (Fcons (x, y), |
2131 | Fcons (make_number (time), | |
cb5df6ae | 2132 | Fcons (part_sym, |
4bb994d1 JB |
2133 | Qnil))))), |
2134 | Qnil))); | |
2135 | } | |
2136 | ||
2137 | /* Or is it an ordinary mouse movement? */ | |
284f4730 JB |
2138 | else |
2139 | { | |
4bb994d1 JB |
2140 | int area; |
2141 | Lisp_Object window = | |
2142 | (frame | |
2143 | ? window_from_coordinates (frame, XINT (x), XINT (y), &area) | |
2144 | : Qnil); | |
2145 | Lisp_Object posn; | |
2146 | ||
2147 | if (XTYPE (window) == Lisp_Window) | |
2148 | { | |
2149 | XSETINT (x, XINT (x) - XINT (XWINDOW (window)->left)); | |
2150 | XSETINT (y, XINT (y) - XINT (XWINDOW (window)->top)); | |
2151 | ||
2152 | if (area == 1) | |
2153 | posn = Qmode_line; | |
2154 | else if (area == 2) | |
2155 | posn = Qvertical_line; | |
2156 | else | |
2157 | XSET (posn, Lisp_Int, | |
2158 | buffer_posn_from_coords (XWINDOW (window), | |
2159 | XINT (x), XINT (y))); | |
2160 | } | |
284f4730 | 2161 | else |
4bb994d1 JB |
2162 | { |
2163 | window = Qnil; | |
2164 | posn = Qnil; | |
2165 | } | |
284f4730 | 2166 | |
4bb994d1 JB |
2167 | return Fcons (Qmouse_movement, |
2168 | Fcons (Fcons (window, | |
2169 | Fcons (posn, | |
2170 | Fcons (Fcons (x, y), | |
2171 | Fcons (make_number (time), | |
2172 | Qnil)))), | |
2173 | Qnil)); | |
2174 | } | |
284f4730 JB |
2175 | } |
2176 | ||
2177 | ||
cd21b839 JB |
2178 | /* Construct a switch frame event. */ |
2179 | static Lisp_Object | |
2180 | make_lispy_switch_frame (frame) | |
2181 | Lisp_Object frame; | |
2182 | { | |
2183 | return Fcons (Qswitch_frame, Fcons (frame, Qnil)); | |
2184 | } | |
2185 | ||
0a7f1fc0 JB |
2186 | \f |
2187 | /* Manipulating modifiers. */ | |
284f4730 | 2188 | |
0a7f1fc0 | 2189 | /* Parse the name of SYMBOL, and return the set of modifiers it contains. |
284f4730 | 2190 | |
0a7f1fc0 JB |
2191 | If MODIFIER_END is non-zero, set *MODIFIER_END to the position in |
2192 | SYMBOL's name of the end of the modifiers; the string from this | |
2193 | position is the unmodified symbol name. | |
284f4730 | 2194 | |
0a7f1fc0 JB |
2195 | This doesn't use any caches. */ |
2196 | static int | |
2197 | parse_modifiers_uncached (symbol, modifier_end) | |
284f4730 | 2198 | Lisp_Object symbol; |
0a7f1fc0 | 2199 | int *modifier_end; |
284f4730 JB |
2200 | { |
2201 | struct Lisp_String *name; | |
2202 | int i; | |
2203 | int modifiers; | |
284f4730 JB |
2204 | |
2205 | CHECK_SYMBOL (symbol, 1); | |
2206 | ||
2207 | modifiers = 0; | |
2208 | name = XSYMBOL (symbol)->name; | |
2209 | ||
284f4730 | 2210 | |
0a7f1fc0 | 2211 | for (i = 0; i+2 <= name->size; ) |
284f4730 JB |
2212 | switch (name->data[i]) |
2213 | { | |
0a7f1fc0 JB |
2214 | #define SINGLE_LETTER_MOD(bit) \ |
2215 | if (name->data[i+1] != '-') \ | |
2216 | goto no_more_modifiers; \ | |
2217 | modifiers |= bit; \ | |
fce33686 | 2218 | i += 2; |
0a7f1fc0 JB |
2219 | |
2220 | case 'A': | |
2221 | SINGLE_LETTER_MOD (alt_modifier); | |
284f4730 JB |
2222 | break; |
2223 | ||
2224 | case 'C': | |
0a7f1fc0 | 2225 | SINGLE_LETTER_MOD (ctrl_modifier); |
fce33686 JB |
2226 | break; |
2227 | ||
2228 | case 'H': | |
0a7f1fc0 | 2229 | SINGLE_LETTER_MOD (hyper_modifier); |
fce33686 JB |
2230 | break; |
2231 | ||
2232 | case 'M': | |
0a7f1fc0 | 2233 | SINGLE_LETTER_MOD (meta_modifier); |
284f4730 JB |
2234 | break; |
2235 | ||
2236 | case 'S': | |
0a7f1fc0 | 2237 | SINGLE_LETTER_MOD (shift_modifier); |
fce33686 JB |
2238 | break; |
2239 | ||
2240 | case 's': | |
86e5706b | 2241 | SINGLE_LETTER_MOD (super_modifier); |
284f4730 JB |
2242 | break; |
2243 | ||
fce33686 JB |
2244 | case 'd': |
2245 | if (i + 5 > name->size) | |
2246 | goto no_more_modifiers; | |
2247 | if (! strncmp (name->data + i, "drag-", 5)) | |
2248 | { | |
fce33686 JB |
2249 | modifiers |= drag_modifier; |
2250 | i += 5; | |
2251 | } | |
2252 | else if (! strncmp (name->data + i, "down-", 5)) | |
2253 | { | |
fce33686 JB |
2254 | modifiers |= down_modifier; |
2255 | i += 5; | |
2256 | } | |
2257 | else | |
2258 | goto no_more_modifiers; | |
284f4730 JB |
2259 | break; |
2260 | ||
2261 | default: | |
2262 | goto no_more_modifiers; | |
0a7f1fc0 JB |
2263 | |
2264 | #undef SINGLE_LETTER_MOD | |
284f4730 JB |
2265 | } |
2266 | no_more_modifiers: | |
2267 | ||
0a7f1fc0 JB |
2268 | /* Should we include the `click' modifier? */ |
2269 | if (! (modifiers & (down_modifier | drag_modifier)) | |
2270 | && i + 7 == name->size | |
4bb994d1 | 2271 | && strncmp (name->data + i, "mouse-", 6) == 0 |
6569cc8d | 2272 | && ('0' <= name->data[i + 6] && name->data[i + 6] <= '9')) |
0a7f1fc0 JB |
2273 | modifiers |= click_modifier; |
2274 | ||
2275 | if (modifier_end) | |
2276 | *modifier_end = i; | |
2277 | ||
2278 | return modifiers; | |
2279 | } | |
2280 | ||
2281 | ||
2282 | /* Return a symbol whose name is the modifier prefixes for MODIFIERS | |
2283 | prepended to the string BASE[0..BASE_LEN-1]. | |
2284 | This doesn't use any caches. */ | |
2285 | static Lisp_Object | |
2286 | apply_modifiers_uncached (modifiers, base, base_len) | |
2287 | int modifiers; | |
2288 | char *base; | |
2289 | int base_len; | |
2290 | { | |
2291 | /* Since BASE could contain nulls, we can't use intern here; we have | |
2292 | to use Fintern, which expects a genuine Lisp_String, and keeps a | |
2293 | reference to it. */ | |
2294 | char *new_mods = | |
86e5706b | 2295 | (char *) alloca (sizeof ("A-C-H-M-S-s-down-drag-")); |
0a7f1fc0 | 2296 | int mod_len; |
284f4730 | 2297 | |
284f4730 | 2298 | { |
0a7f1fc0 JB |
2299 | char *p = new_mods; |
2300 | ||
2301 | /* Only the event queue may use the `up' modifier; it should always | |
2302 | be turned into a click or drag event before presented to lisp code. */ | |
2303 | if (modifiers & up_modifier) | |
2304 | abort (); | |
2305 | ||
2306 | if (modifiers & alt_modifier) { *p++ = 'A'; *p++ = '-'; } | |
2307 | if (modifiers & ctrl_modifier) { *p++ = 'C'; *p++ = '-'; } | |
2308 | if (modifiers & hyper_modifier) { *p++ = 'H'; *p++ = '-'; } | |
2309 | if (modifiers & meta_modifier) { *p++ = 'M'; *p++ = '-'; } | |
2310 | if (modifiers & shift_modifier) { *p++ = 'S'; *p++ = '-'; } | |
86e5706b | 2311 | if (modifiers & super_modifier) { *p++ = 's'; *p++ = '-'; } |
0a7f1fc0 JB |
2312 | if (modifiers & down_modifier) { strcpy (p, "down-"); p += 5; } |
2313 | if (modifiers & drag_modifier) { strcpy (p, "drag-"); p += 5; } | |
2314 | /* The click modifier is denoted by the absence of other modifiers. */ | |
2315 | ||
2316 | *p = '\0'; | |
2317 | ||
2318 | mod_len = p - new_mods; | |
2319 | } | |
284f4730 | 2320 | |
0a7f1fc0 JB |
2321 | { |
2322 | Lisp_Object new_name = make_uninit_string (mod_len + base_len); | |
2323 | ||
2324 | bcopy (new_mods, XSTRING (new_name)->data, mod_len); | |
2325 | bcopy (base, XSTRING (new_name)->data + mod_len, base_len); | |
284f4730 JB |
2326 | |
2327 | return Fintern (new_name, Qnil); | |
2328 | } | |
2329 | } | |
2330 | ||
2331 | ||
0a7f1fc0 JB |
2332 | static char *modifier_names[] = |
2333 | { | |
86e5706b RS |
2334 | "up", 0, 0, 0, 0, 0, 0, "down", |
2335 | "drag", "click", 0, 0, 0, 0, 0, 0, | |
2336 | 0, 0, "alt", "super", "hyper", "shift", "control", "meta" | |
0a7f1fc0 JB |
2337 | }; |
2338 | ||
2339 | static Lisp_Object modifier_symbols; | |
2340 | ||
2341 | /* Return the list of modifier symbols corresponding to the mask MODIFIERS. */ | |
2342 | static Lisp_Object | |
2343 | lispy_modifier_list (modifiers) | |
2344 | int modifiers; | |
2345 | { | |
2346 | Lisp_Object modifier_list; | |
2347 | int i; | |
2348 | ||
2349 | modifier_list = Qnil; | |
2350 | for (i = 0; (1<<i) <= modifiers; i++) | |
2351 | if (modifiers & (1<<i)) | |
8f805655 JB |
2352 | { |
2353 | if (i >= XVECTOR (modifier_symbols)->size) | |
2354 | abort (); | |
2355 | modifier_list = Fcons (XVECTOR (modifier_symbols)->contents[i], | |
2356 | modifier_list); | |
2357 | } | |
0a7f1fc0 JB |
2358 | |
2359 | return modifier_list; | |
2360 | } | |
2361 | ||
2362 | ||
2363 | /* Parse the modifiers on SYMBOL, and return a list like (UNMODIFIED MASK), | |
2364 | where UNMODIFIED is the unmodified form of SYMBOL, | |
2365 | MASK is the set of modifiers present in SYMBOL's name. | |
2366 | This is similar to parse_modifiers_uncached, but uses the cache in | |
2367 | SYMBOL's Qevent_symbol_element_mask property, and maintains the | |
2368 | Qevent_symbol_elements property. */ | |
2369 | static Lisp_Object | |
2370 | parse_modifiers (symbol) | |
2371 | Lisp_Object symbol; | |
2372 | { | |
2373 | Lisp_Object elements = Fget (symbol, Qevent_symbol_element_mask); | |
2374 | ||
2375 | if (CONSP (elements)) | |
2376 | return elements; | |
2377 | else | |
2378 | { | |
2379 | int end; | |
2380 | int modifiers = parse_modifiers_uncached (symbol, &end); | |
2381 | Lisp_Object unmodified | |
2382 | = Fintern (make_string (XSYMBOL (symbol)->name->data + end, | |
2383 | XSYMBOL (symbol)->name->size - end), | |
2384 | Qnil); | |
2385 | Lisp_Object mask; | |
2386 | ||
2387 | XFASTINT (mask) = modifiers; | |
2388 | elements = Fcons (unmodified, Fcons (mask, Qnil)); | |
2389 | ||
2390 | /* Cache the parsing results on SYMBOL. */ | |
2391 | Fput (symbol, Qevent_symbol_element_mask, | |
2392 | elements); | |
2393 | Fput (symbol, Qevent_symbol_elements, | |
2394 | Fcons (unmodified, lispy_modifier_list (modifiers))); | |
2395 | ||
2396 | /* Since we know that SYMBOL is modifiers applied to unmodified, | |
2397 | it would be nice to put that in unmodified's cache. | |
2398 | But we can't, since we're not sure that parse_modifiers is | |
2399 | canonical. */ | |
2400 | ||
2401 | return elements; | |
2402 | } | |
2403 | } | |
2404 | ||
2405 | /* Apply the modifiers MODIFIERS to the symbol BASE. | |
2406 | BASE must be unmodified. | |
2407 | ||
2408 | This is like apply_modifiers_uncached, but uses BASE's | |
2409 | Qmodifier_cache property, if present. It also builds | |
cd21b839 JB |
2410 | Qevent_symbol_elements properties, since it has that info anyway. |
2411 | ||
2412 | apply_modifiers copies the value of BASE's Qevent_kind property to | |
2413 | the modified symbol. */ | |
0a7f1fc0 JB |
2414 | static Lisp_Object |
2415 | apply_modifiers (modifiers, base) | |
2416 | int modifiers; | |
2417 | Lisp_Object base; | |
2418 | { | |
7b4aedb9 | 2419 | Lisp_Object cache, index, entry, new_symbol; |
0a7f1fc0 JB |
2420 | |
2421 | /* The click modifier never figures into cache indices. */ | |
0a7f1fc0 | 2422 | cache = Fget (base, Qmodifier_cache); |
cd21b839 | 2423 | XFASTINT (index) = (modifiers & ~click_modifier); |
0a7f1fc0 JB |
2424 | entry = Fassq (index, cache); |
2425 | ||
2426 | if (CONSP (entry)) | |
7b4aedb9 JB |
2427 | new_symbol = XCONS (entry)->cdr; |
2428 | else | |
2429 | { | |
2430 | /* We have to create the symbol ourselves. */ | |
2431 | new_symbol = apply_modifiers_uncached (modifiers, | |
2432 | XSYMBOL (base)->name->data, | |
2433 | XSYMBOL (base)->name->size); | |
2434 | ||
2435 | /* Add the new symbol to the base's cache. */ | |
2436 | entry = Fcons (index, new_symbol); | |
2437 | Fput (base, Qmodifier_cache, Fcons (entry, cache)); | |
2438 | ||
2439 | /* We have the parsing info now for free, so add it to the caches. */ | |
2440 | XFASTINT (index) = modifiers; | |
2441 | Fput (new_symbol, Qevent_symbol_element_mask, | |
2442 | Fcons (base, Fcons (index, Qnil))); | |
2443 | Fput (new_symbol, Qevent_symbol_elements, | |
2444 | Fcons (base, lispy_modifier_list (modifiers))); | |
2445 | } | |
0a7f1fc0 | 2446 | |
7b4aedb9 JB |
2447 | /* Make sure this symbol is of the same kind as BASE. |
2448 | ||
2449 | You'd think we could just set this once and for all when we | |
2450 | intern the symbol above, but reorder_modifiers may call us when | |
2451 | BASE's property isn't set right; we can't assume that just | |
2452 | because we found something in the cache it must have its kind set | |
2453 | right. */ | |
2454 | if (NILP (Fget (new_symbol, Qevent_kind))) | |
2455 | { | |
2456 | Lisp_Object kind = Fget (base, Qevent_kind); | |
2457 | ||
2458 | if (! NILP (kind)) | |
2459 | Fput (new_symbol, Qevent_kind, kind); | |
2460 | } | |
2461 | ||
2462 | return new_symbol; | |
0a7f1fc0 JB |
2463 | } |
2464 | ||
2465 | ||
2466 | /* Given a symbol whose name begins with modifiers ("C-", "M-", etc), | |
2467 | return a symbol with the modifiers placed in the canonical order. | |
2468 | Canonical order is alphabetical, except for down and drag, which | |
2469 | always come last. The 'click' modifier is never written out. | |
2470 | ||
2471 | Fdefine_key calls this to make sure that (for example) C-M-foo | |
2472 | and M-C-foo end up being equivalent in the keymap. */ | |
2473 | ||
2474 | Lisp_Object | |
2475 | reorder_modifiers (symbol) | |
2476 | Lisp_Object symbol; | |
2477 | { | |
2478 | /* It's hopefully okay to write the code this way, since everything | |
2479 | will soon be in caches, and no consing will be done at all. */ | |
2480 | Lisp_Object parsed = parse_modifiers (symbol); | |
2481 | ||
2482 | return apply_modifiers (XCONS (XCONS (parsed)->cdr)->car, | |
2483 | XCONS (parsed)->car); | |
2484 | } | |
2485 | ||
2486 | ||
284f4730 JB |
2487 | /* For handling events, we often want to produce a symbol whose name |
2488 | is a series of modifier key prefixes ("M-", "C-", etcetera) attached | |
2489 | to some base, like the name of a function key or mouse button. | |
2490 | modify_event_symbol produces symbols of this sort. | |
2491 | ||
2492 | NAME_TABLE should point to an array of strings, such that NAME_TABLE[i] | |
2493 | is the name of the i'th symbol. TABLE_SIZE is the number of elements | |
2494 | in the table. | |
2495 | ||
2496 | SYMBOL_TABLE should be a pointer to a Lisp_Object whose value will | |
2497 | persist between calls to modify_event_symbol that it can use to | |
2498 | store a cache of the symbols it's generated for this NAME_TABLE | |
2499 | before. | |
2500 | ||
2501 | SYMBOL_NUM is the number of the base name we want from NAME_TABLE. | |
2502 | ||
2503 | MODIFIERS is a set of modifier bits (as given in struct input_events) | |
2504 | whose prefixes should be applied to the symbol name. | |
2505 | ||
2506 | SYMBOL_KIND is the value to be placed in the event_kind property of | |
88cb0656 JB |
2507 | the returned symbol. |
2508 | ||
2509 | The symbols we create are supposed to have an | |
2510 | `event-symbol-elements' propery, which lists the modifiers present | |
2511 | in the symbol's name. */ | |
2512 | ||
284f4730 JB |
2513 | static Lisp_Object |
2514 | modify_event_symbol (symbol_num, modifiers, symbol_kind, name_table, | |
2515 | symbol_table, table_size) | |
2516 | int symbol_num; | |
2517 | unsigned modifiers; | |
2518 | Lisp_Object symbol_kind; | |
2519 | char **name_table; | |
2520 | Lisp_Object *symbol_table; | |
2521 | int table_size; | |
2522 | { | |
88cb0656 | 2523 | Lisp_Object *slot; |
284f4730 JB |
2524 | |
2525 | /* Is this a request for a valid symbol? */ | |
88cb0656 | 2526 | if (symbol_num < 0 || symbol_num >= table_size) |
284f4730 JB |
2527 | abort (); |
2528 | ||
0a7f1fc0 | 2529 | /* If *symbol_table doesn't seem to be initialized properly, fix that. |
88cb0656 | 2530 | *symbol_table should be a lisp vector TABLE_SIZE elements long, |
4bb994d1 JB |
2531 | where the Nth element is the symbol for NAME_TABLE[N], or nil if |
2532 | we've never used that symbol before. */ | |
284f4730 JB |
2533 | if (XTYPE (*symbol_table) != Lisp_Vector |
2534 | || XVECTOR (*symbol_table)->size != table_size) | |
88cb0656 | 2535 | { |
0a7f1fc0 JB |
2536 | Lisp_Object size; |
2537 | ||
2538 | XFASTINT (size) = table_size; | |
2539 | *symbol_table = Fmake_vector (size, Qnil); | |
88cb0656 | 2540 | } |
284f4730 | 2541 | |
88cb0656 | 2542 | slot = & XVECTOR (*symbol_table)->contents[symbol_num]; |
284f4730 | 2543 | |
0a7f1fc0 JB |
2544 | /* Have we already used this symbol before? */ |
2545 | if (NILP (*slot)) | |
284f4730 | 2546 | { |
0a7f1fc0 JB |
2547 | /* No; let's create it. */ |
2548 | *slot = intern (name_table[symbol_num]); | |
2549 | ||
2550 | /* Fill in the cache entries for this symbol; this also | |
2551 | builds the Qevent_symbol_elements property, which the user | |
2552 | cares about. */ | |
6569cc8d | 2553 | apply_modifiers (modifiers & click_modifier, *slot); |
0a7f1fc0 | 2554 | Fput (*slot, Qevent_kind, symbol_kind); |
284f4730 | 2555 | } |
88cb0656 | 2556 | |
0a7f1fc0 JB |
2557 | /* Apply modifiers to that symbol. */ |
2558 | return apply_modifiers (modifiers, *slot); | |
284f4730 | 2559 | } |
0a7f1fc0 | 2560 | |
284f4730 | 2561 | \f |
284f4730 JB |
2562 | /* Store into *addr a value nonzero if terminal input chars are available. |
2563 | Serves the purpose of ioctl (0, FIONREAD, addr) | |
2564 | but works even if FIONREAD does not exist. | |
2565 | (In fact, this may actually read some input.) */ | |
2566 | ||
2567 | static void | |
2568 | get_input_pending (addr) | |
2569 | int *addr; | |
2570 | { | |
2571 | /* First of all, have we already counted some input? */ | |
2572 | *addr = !NILP (Vquit_flag) || readable_events (); | |
2573 | ||
2574 | /* If input is being read as it arrives, and we have none, there is none. */ | |
2575 | if (*addr > 0 || (interrupt_input && ! interrupts_deferred)) | |
2576 | return; | |
2577 | ||
2578 | /* Try to read some input and see how much we get. */ | |
2579 | gobble_input (0); | |
2580 | *addr = !NILP (Vquit_flag) || readable_events (); | |
2581 | } | |
2582 | ||
2583 | /* Interface to read_avail_input, blocking SIGIO if necessary. */ | |
2584 | ||
2585 | int | |
2586 | gobble_input (expected) | |
2587 | int expected; | |
2588 | { | |
2589 | #ifndef VMS | |
2590 | #ifdef SIGIO | |
2591 | if (interrupt_input) | |
2592 | { | |
32676c08 | 2593 | SIGMASKTYPE mask; |
e065a56e | 2594 | mask = sigblockx (SIGIO); |
284f4730 | 2595 | read_avail_input (expected); |
e065a56e | 2596 | sigsetmask (mask); |
284f4730 JB |
2597 | } |
2598 | else | |
2599 | #endif | |
2600 | read_avail_input (expected); | |
2601 | #endif | |
2602 | } | |
2603 | \f | |
2604 | #ifndef VMS | |
2605 | ||
2606 | /* Read any terminal input already buffered up by the system | |
2607 | into the kbd_buffer, but do not wait. | |
2608 | ||
2609 | EXPECTED should be nonzero if the caller knows there is some input. | |
2610 | ||
2611 | Except on VMS, all input is read by this function. | |
2612 | If interrupt_input is nonzero, this function MUST be called | |
2613 | only when SIGIO is blocked. | |
2614 | ||
2615 | Returns the number of keyboard chars read, or -1 meaning | |
2616 | this is a bad time to try to read input. */ | |
2617 | ||
2618 | static int | |
2619 | read_avail_input (expected) | |
2620 | int expected; | |
2621 | { | |
2622 | struct input_event buf[KBD_BUFFER_SIZE]; | |
2623 | register int i; | |
2624 | int nread; | |
2625 | ||
2626 | if (read_socket_hook) | |
2627 | /* No need for FIONREAD or fcntl; just say don't wait. */ | |
2628 | nread = (*read_socket_hook) (0, buf, KBD_BUFFER_SIZE, expected, expected); | |
2629 | else | |
2630 | { | |
2631 | unsigned char cbuf[KBD_BUFFER_SIZE]; | |
2632 | ||
2633 | #ifdef FIONREAD | |
2634 | /* Find out how much input is available. */ | |
2635 | if (ioctl (0, FIONREAD, &nread) < 0) | |
2636 | /* Formerly simply reported no input, but that sometimes led to | |
2637 | a failure of Emacs to terminate. | |
2638 | SIGHUP seems appropriate if we can't reach the terminal. */ | |
e4535288 RS |
2639 | /* ??? Is it really right to send the signal just to this process |
2640 | rather than to the whole process group? | |
2641 | Perhaps on systems with FIONREAD Emacs is alone in its group. */ | |
284f4730 JB |
2642 | kill (getpid (), SIGHUP); |
2643 | if (nread == 0) | |
2644 | return 0; | |
2645 | if (nread > sizeof cbuf) | |
2646 | nread = sizeof cbuf; | |
2647 | #else /* no FIONREAD */ | |
2648 | #ifdef USG | |
2649 | /* Read some input if available, but don't wait. */ | |
2650 | nread = sizeof cbuf; | |
2651 | fcntl (fileno (stdin), F_SETFL, O_NDELAY); | |
2652 | #else | |
2653 | you lose; | |
2654 | #endif | |
2655 | #endif | |
2656 | ||
2657 | /* Now read; for one reason or another, this will not block. */ | |
2658 | while (1) | |
2659 | { | |
2660 | nread = read (fileno (stdin), cbuf, nread); | |
2661 | #ifdef AIX | |
2662 | /* The kernel sometimes fails to deliver SIGHUP for ptys. | |
2663 | This looks incorrect, but it isn't, because _BSD causes | |
2664 | O_NDELAY to be defined in fcntl.h as O_NONBLOCK, | |
2665 | and that causes a value other than 0 when there is no input. */ | |
2666 | if (nread == 0) | |
2667 | kill (SIGHUP, 0); | |
2668 | #endif | |
2669 | /* Retry the read if it is interrupted. */ | |
2670 | if (nread >= 0 | |
2671 | || ! (errno == EAGAIN || errno == EFAULT | |
2672 | #ifdef EBADSLT | |
2673 | || errno == EBADSLT | |
2674 | #endif | |
2675 | )) | |
2676 | break; | |
2677 | } | |
2678 | ||
2679 | #ifndef FIONREAD | |
2680 | #ifdef USG | |
2681 | fcntl (fileno (stdin), F_SETFL, 0); | |
2682 | #endif /* USG */ | |
2683 | #endif /* no FIONREAD */ | |
2684 | for (i = 0; i < nread; i++) | |
2685 | { | |
2686 | buf[i].kind = ascii_keystroke; | |
86e5706b RS |
2687 | buf[i].modifiers = 0; |
2688 | if (meta_key && (cbuf[i] & 0x80)) | |
2689 | buf[i].modifiers = meta_modifier; | |
2690 | cbuf[i] &= ~0x80; | |
2691 | ||
7b4aedb9 JB |
2692 | XSET (buf[i].code, Lisp_Int, cbuf[i]); |
2693 | #ifdef MULTI_FRAME | |
2694 | XSET (buf[i].frame_or_window, Lisp_Frame, selected_frame); | |
2695 | #else | |
2696 | buf[i].frame_or_window = Qnil; | |
2697 | #endif | |
284f4730 JB |
2698 | } |
2699 | } | |
2700 | ||
2701 | /* Scan the chars for C-g and store them in kbd_buffer. */ | |
2702 | for (i = 0; i < nread; i++) | |
2703 | { | |
2704 | kbd_buffer_store_event (&buf[i]); | |
2705 | /* Don't look at input that follows a C-g too closely. | |
2706 | This reduces lossage due to autorepeat on C-g. */ | |
2707 | if (buf[i].kind == ascii_keystroke | |
2708 | && XINT(buf[i].code) == quit_char) | |
2709 | break; | |
2710 | } | |
2711 | ||
2712 | return nread; | |
2713 | } | |
2714 | #endif /* not VMS */ | |
2715 | \f | |
2716 | #ifdef SIGIO /* for entire page */ | |
2717 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
2718 | ||
2ce30ea2 | 2719 | SIGTYPE |
284f4730 JB |
2720 | input_available_signal (signo) |
2721 | int signo; | |
2722 | { | |
2723 | /* Must preserve main program's value of errno. */ | |
2724 | int old_errno = errno; | |
2725 | #ifdef BSD4_1 | |
2726 | extern int select_alarmed; | |
2727 | #endif | |
2728 | ||
2729 | #ifdef USG | |
2730 | /* USG systems forget handlers when they are used; | |
2731 | must reestablish each time */ | |
2732 | signal (signo, input_available_signal); | |
2733 | #endif /* USG */ | |
2734 | ||
2735 | #ifdef BSD4_1 | |
2736 | sigisheld (SIGIO); | |
2737 | #endif | |
2738 | ||
ffd56f97 JB |
2739 | if (input_available_clear_time) |
2740 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
284f4730 JB |
2741 | |
2742 | while (1) | |
2743 | { | |
2744 | int nread; | |
2745 | nread = read_avail_input (1); | |
2746 | /* -1 means it's not ok to read the input now. | |
2747 | UNBLOCK_INPUT will read it later; now, avoid infinite loop. | |
2748 | 0 means there was no keyboard input available. */ | |
2749 | if (nread <= 0) | |
2750 | break; | |
2751 | ||
2752 | #ifdef BSD4_1 | |
2753 | select_alarmed = 1; /* Force the select emulator back to life */ | |
2754 | #endif | |
2755 | } | |
2756 | ||
2757 | #ifdef BSD4_1 | |
2758 | sigfree (); | |
2759 | #endif | |
2760 | errno = old_errno; | |
2761 | } | |
2762 | #endif /* SIGIO */ | |
2763 | \f | |
2764 | /* Return the prompt-string of a sparse keymap. | |
2765 | This is the first element which is a string. | |
2766 | Return nil if there is none. */ | |
2767 | ||
2768 | Lisp_Object | |
2769 | map_prompt (map) | |
2770 | Lisp_Object map; | |
2771 | { | |
2772 | while (CONSP (map)) | |
2773 | { | |
2774 | register Lisp_Object tem; | |
2775 | tem = Fcar (map); | |
2776 | if (XTYPE (tem) == Lisp_String) | |
2777 | return tem; | |
2778 | map = Fcdr (map); | |
2779 | } | |
2780 | return Qnil; | |
2781 | } | |
2782 | ||
2783 | static int echo_flag; | |
2784 | static int echo_now; | |
2785 | ||
2786 | /* Read a character like read_char but optionally prompt based on maps | |
dbc4e1c1 JB |
2787 | in the array MAPS. NMAPS is the length of MAPS. Return nil if we |
2788 | decided not to read a character, because there are no menu items in | |
2789 | MAPS. | |
7d6de002 RS |
2790 | |
2791 | PREV_EVENT is the previous input event, or nil if we are reading | |
2792 | the first event of a key sequence. | |
2793 | ||
6569cc8d JB |
2794 | If USED_MOUSE_MENU is non-zero, then we set *USED_MOUSE_MENU to 1 |
2795 | if we used a mouse menu to read the input, or zero otherwise. If | |
2796 | USED_MOUSE_MENU is zero, *USED_MOUSE_MENU is left alone. | |
284f4730 JB |
2797 | |
2798 | The prompting is done based on the prompt-string of the map | |
2799 | and the strings associated with various map elements. */ | |
2800 | ||
2801 | Lisp_Object | |
7d6de002 RS |
2802 | read_char_menu_prompt (nmaps, maps, prev_event, used_mouse_menu) |
2803 | int nmaps; | |
2804 | Lisp_Object *maps; | |
2805 | Lisp_Object prev_event; | |
2806 | int *used_mouse_menu; | |
284f4730 | 2807 | { |
7d6de002 RS |
2808 | int mapno; |
2809 | register Lisp_Object name; | |
284f4730 | 2810 | int nlength; |
ff11dfa1 | 2811 | int width = FRAME_WIDTH (selected_frame) - 4; |
7d6de002 RS |
2812 | char *menu = (char *) alloca (width + 4); |
2813 | int idx = -1; | |
2814 | Lisp_Object rest, vector; | |
2815 | ||
6569cc8d JB |
2816 | if (used_mouse_menu) |
2817 | *used_mouse_menu = 0; | |
284f4730 JB |
2818 | |
2819 | /* Use local over global Menu maps */ | |
2820 | ||
7d6de002 RS |
2821 | if (! menu_prompting) |
2822 | return Qnil; | |
2823 | ||
2824 | /* Get the menu name from the first map that has one (a prompt string). */ | |
2825 | for (mapno = 0; mapno < nmaps; mapno++) | |
2826 | { | |
2827 | name = map_prompt (maps[mapno]); | |
2828 | if (!NILP (name)) | |
2829 | break; | |
2830 | } | |
284f4730 | 2831 | |
7d6de002 | 2832 | /* If we don't have any menus, just read a character normally. */ |
dbc4e1c1 | 2833 | if (mapno >= nmaps) |
7d6de002 RS |
2834 | return Qnil; |
2835 | ||
dbc4e1c1 JB |
2836 | #ifdef HAVE_X_WINDOWS |
2837 | #ifdef HAVE_X_MENU | |
7d6de002 RS |
2838 | /* If we got to this point via a mouse click, |
2839 | use a real menu for mouse selection. */ | |
dbc4e1c1 | 2840 | if (EVENT_HAS_PARAMETERS (prev_event)) |
7d6de002 RS |
2841 | { |
2842 | /* Display the menu and get the selection. */ | |
2843 | Lisp_Object *realmaps | |
2844 | = (Lisp_Object *) alloca (nmaps * sizeof (Lisp_Object)); | |
2845 | Lisp_Object value; | |
2846 | int nmaps1 = 0; | |
2847 | ||
2848 | /* Use the maps that are not nil. */ | |
2849 | for (mapno = 0; mapno < nmaps; mapno++) | |
2850 | if (!NILP (maps[mapno])) | |
2851 | realmaps[nmaps1++] = maps[mapno]; | |
2852 | ||
2853 | value = Fx_popup_menu (prev_event, Flist (nmaps1, realmaps)); | |
2854 | if (NILP (value)) | |
2855 | XSET (value, Lisp_Int, quit_char); | |
6569cc8d JB |
2856 | if (used_mouse_menu) |
2857 | *used_mouse_menu = 1; | |
7d6de002 RS |
2858 | return value; |
2859 | } | |
dbc4e1c1 JB |
2860 | #endif /* HAVE_X_MENU */ |
2861 | #endif /* HAVE_X_WINDOWS */ | |
284f4730 JB |
2862 | |
2863 | /* Prompt string always starts with map's prompt, and a space. */ | |
2864 | strcpy (menu, XSTRING (name)->data); | |
2865 | nlength = XSTRING (name)->size; | |
7d6de002 | 2866 | menu[nlength++] = ':'; |
284f4730 JB |
2867 | menu[nlength++] = ' '; |
2868 | menu[nlength] = 0; | |
2869 | ||
7d6de002 RS |
2870 | /* Start prompting at start of first map. */ |
2871 | mapno = 0; | |
2872 | rest = maps[mapno]; | |
284f4730 JB |
2873 | |
2874 | /* Present the documented bindings, a line at a time. */ | |
2875 | while (1) | |
2876 | { | |
2877 | int notfirst = 0; | |
2878 | int i = nlength; | |
2879 | Lisp_Object obj; | |
2880 | int ch; | |
2881 | ||
284f4730 | 2882 | /* Loop over elements of map. */ |
7d6de002 | 2883 | while (i < width) |
284f4730 | 2884 | { |
7d6de002 | 2885 | Lisp_Object s, elt; |
284f4730 | 2886 | |
7d6de002 RS |
2887 | /* If reached end of map, start at beginning of next map. */ |
2888 | if (NILP (rest)) | |
2889 | { | |
2890 | mapno++; | |
2891 | /* At end of last map, wrap around to first map if just starting, | |
2892 | or end this line if already have something on it. */ | |
2893 | if (mapno == nmaps) | |
284f4730 | 2894 | { |
7d6de002 RS |
2895 | if (notfirst) |
2896 | break; | |
2897 | else | |
2898 | mapno = 0; | |
284f4730 | 2899 | } |
7d6de002 | 2900 | rest = maps[mapno]; |
284f4730 | 2901 | } |
7d6de002 RS |
2902 | |
2903 | /* Look at the next element of the map. */ | |
2904 | if (idx >= 0) | |
2905 | elt = XVECTOR (vector)->contents[idx]; | |
284f4730 | 2906 | else |
7d6de002 RS |
2907 | elt = Fcar_safe (rest); |
2908 | ||
2909 | if (idx < 0 && XTYPE (elt) == Lisp_Vector) | |
284f4730 | 2910 | { |
7d6de002 RS |
2911 | /* If we found a dense table in the keymap, |
2912 | advanced past it, but start scanning its contents. */ | |
2913 | rest = Fcdr_safe (rest); | |
2914 | vector = elt; | |
2915 | idx = 0; | |
284f4730 | 2916 | } |
7d6de002 RS |
2917 | else |
2918 | { | |
2919 | /* An ordinary element. */ | |
2920 | s = Fcar_safe (Fcdr_safe (elt)); | |
2921 | if (XTYPE (s) != Lisp_String) | |
2922 | /* Ignore the element if it has no prompt string. */ | |
2923 | ; | |
2924 | /* If we have room for the prompt string, add it to this line. | |
2925 | If this is the first on the line, always add it. */ | |
2926 | else if (XSTRING (s)->size + i < width | |
2927 | || !notfirst) | |
2928 | { | |
2929 | int thiswidth; | |
284f4730 | 2930 | |
7d6de002 RS |
2931 | /* Punctuate between strings. */ |
2932 | if (notfirst) | |
2933 | { | |
2934 | strcpy (menu + i, ", "); | |
2935 | i += 2; | |
2936 | } | |
2937 | notfirst = 1; | |
2938 | ||
2939 | /* Add as much of string as fits. */ | |
2940 | thiswidth = XSTRING (s)->size; | |
2941 | if (thiswidth + i > width) | |
2942 | thiswidth = width - i; | |
2943 | bcopy (XSTRING (s)->data, menu + i, thiswidth); | |
2944 | i += thiswidth; | |
2945 | } | |
2946 | else | |
2947 | { | |
2948 | /* If this element does not fit, end the line now, | |
2949 | and save the element for the next line. */ | |
2950 | strcpy (menu + i, "..."); | |
2951 | break; | |
2952 | } | |
2953 | ||
2954 | /* Move past this element. */ | |
2955 | if (idx >= 0 && idx + 1 >= XVECTOR (rest)->size) | |
2956 | /* Handle reaching end of dense table. */ | |
2957 | idx = -1; | |
2958 | if (idx >= 0) | |
2959 | idx++; | |
2960 | else | |
2961 | rest = Fcdr_safe (rest); | |
2962 | } | |
284f4730 JB |
2963 | } |
2964 | ||
2965 | /* Prompt with that and read response. */ | |
2966 | message1 (menu); | |
7d6de002 | 2967 | obj = read_char (1, 0, 0, Qnil, 0); |
284f4730 JB |
2968 | |
2969 | if (XTYPE (obj) != Lisp_Int) | |
2970 | return obj; | |
2971 | else | |
2972 | ch = XINT (obj); | |
2973 | ||
f4255cd1 | 2974 | if (! EQ (obj, menu_prompt_more_char) |
284f4730 | 2975 | && (XTYPE (menu_prompt_more_char) != Lisp_Int |
f4255cd1 | 2976 | || ! EQ (obj, make_number (Ctl (XINT (menu_prompt_more_char)))))) |
284f4730 JB |
2977 | return obj; |
2978 | } | |
2979 | } | |
284f4730 JB |
2980 | \f |
2981 | /* Reading key sequences. */ | |
2982 | ||
2983 | /* Follow KEY in the maps in CURRENT[0..NMAPS-1], placing its bindings | |
2984 | in DEFS[0..NMAPS-1]. Set NEXT[i] to DEFS[i] if DEFS[i] is a | |
2985 | keymap, or nil otherwise. Return the index of the first keymap in | |
2986 | which KEY has any binding, or NMAPS if no map has a binding. | |
2987 | ||
2988 | If KEY is a meta ASCII character, treat it like meta-prefix-char | |
2989 | followed by the corresponding non-meta character. Keymaps in | |
2990 | CURRENT with non-prefix bindings for meta-prefix-char become nil in | |
2991 | NEXT. | |
2992 | ||
2993 | When KEY is not defined in any of the keymaps, if it is an upper | |
2994 | case letter and there are bindings for the corresponding lower-case | |
2995 | letter, return the bindings for the lower-case letter. | |
2996 | ||
88cb0656 JB |
2997 | If KEY has no bindings in any of the CURRENT maps, NEXT is left |
2998 | unmodified. | |
2999 | ||
284f4730 JB |
3000 | NEXT may == CURRENT. */ |
3001 | ||
3002 | static int | |
3003 | follow_key (key, nmaps, current, defs, next) | |
3004 | Lisp_Object key; | |
3005 | Lisp_Object *current, *defs, *next; | |
3006 | int nmaps; | |
3007 | { | |
3008 | int i, first_binding; | |
3009 | ||
3010 | /* If KEY is a meta ASCII character, treat it like meta-prefix-char | |
3011 | followed by the corresponding non-meta character. */ | |
86e5706b | 3012 | if (XTYPE (key) == Lisp_Int && (XINT (key) & CHAR_META)) |
284f4730 JB |
3013 | { |
3014 | for (i = 0; i < nmaps; i++) | |
3015 | if (! NILP (current[i])) | |
3016 | { | |
cd21b839 JB |
3017 | next[i] = |
3018 | get_keyelt (access_keymap (current[i], meta_prefix_char, 1)); | |
284f4730 JB |
3019 | |
3020 | /* Note that since we pass the resulting bindings through | |
3021 | get_keymap_1, non-prefix bindings for meta-prefix-char | |
3022 | disappear. */ | |
f4255cd1 | 3023 | next[i] = get_keymap_1 (next[i], 0, 1); |
284f4730 JB |
3024 | } |
3025 | else | |
3026 | next[i] = Qnil; | |
3027 | ||
3028 | current = next; | |
86e5706b | 3029 | XSET (key, Lisp_Int, XFASTINT (key) & ~CHAR_META); |
284f4730 JB |
3030 | } |
3031 | ||
3032 | first_binding = nmaps; | |
3033 | for (i = nmaps - 1; i >= 0; i--) | |
3034 | { | |
3035 | if (! NILP (current[i])) | |
3036 | { | |
cd21b839 | 3037 | defs[i] = get_keyelt (access_keymap (current[i], key, 1)); |
284f4730 JB |
3038 | if (! NILP (defs[i])) |
3039 | first_binding = i; | |
3040 | } | |
3041 | else | |
3042 | defs[i] = Qnil; | |
3043 | } | |
3044 | ||
3045 | /* When KEY is not defined in any of the keymaps, if it is an upper | |
3046 | case letter and there are bindings for the corresponding | |
3047 | lower-case letter, return the bindings for the lower-case letter. */ | |
3048 | if (first_binding == nmaps | |
3049 | && XTYPE (key) == Lisp_Int | |
86e5706b RS |
3050 | && (UPPERCASEP (XINT (key) & 0x3ffff) |
3051 | || (XINT (key) & shift_modifier))) | |
284f4730 | 3052 | { |
86e5706b RS |
3053 | if (XINT (key) & shift_modifier) |
3054 | XSETINT (key, XINT (key) & ~shift_modifier); | |
3055 | else | |
3056 | XSETINT (key, DOWNCASE (XINT (key))); | |
284f4730 JB |
3057 | |
3058 | first_binding = nmaps; | |
3059 | for (i = nmaps - 1; i >= 0; i--) | |
3060 | { | |
3061 | if (! NILP (current[i])) | |
3062 | { | |
cd21b839 | 3063 | defs[i] = get_keyelt (access_keymap (current[i], key, 1)); |
284f4730 JB |
3064 | if (! NILP (defs[i])) |
3065 | first_binding = i; | |
3066 | } | |
3067 | else | |
3068 | defs[i] = Qnil; | |
3069 | } | |
3070 | } | |
86e5706b | 3071 | |
284f4730 | 3072 | /* Given the set of bindings we've found, produce the next set of maps. */ |
0a7f1fc0 JB |
3073 | if (first_binding < nmaps) |
3074 | for (i = 0; i < nmaps; i++) | |
f4255cd1 | 3075 | next[i] = NILP (defs[i]) ? Qnil : get_keymap_1 (defs[i], 0, 1); |
284f4730 JB |
3076 | |
3077 | return first_binding; | |
3078 | } | |
3079 | ||
f4255cd1 JB |
3080 | /* Read a sequence of keys that ends with a non prefix character, |
3081 | storing it in KEYBUF, a buffer of size BUFSIZE. | |
3082 | Prompt with PROMPT. | |
284f4730 JB |
3083 | Return the length of the key sequence stored. |
3084 | ||
f4255cd1 JB |
3085 | Echo starting immediately unless `prompt' is 0. |
3086 | ||
3087 | Where a key sequence ends depends on the currently active keymaps. | |
3088 | These include any minor mode keymaps active in the current buffer, | |
3089 | the current buffer's local map, and the global map. | |
3090 | ||
3091 | If a key sequence has no other bindings, we check Vfunction_key_map | |
3092 | to see if some trailing subsequence might be the beginning of a | |
3093 | function key's sequence. If so, we try to read the whole function | |
3094 | key, and substitute its symbolic name into the key sequence. | |
3095 | ||
3096 | We ignore unbound `down-' mouse clicks. We turn unbound `drag-' | |
3097 | events into similar click events, if that would make them bound. | |
3098 | ||
3099 | If we get a mouse click in a mode line, vertical divider, or other | |
3100 | non-text area, we treat the click as if it were prefixed by the | |
3101 | symbol denoting that area - `mode-line', `vertical-line', or | |
3102 | whatever. | |
3103 | ||
3104 | If the sequence starts with a mouse click, we read the key sequence | |
3105 | with respect to the buffer clicked on, not the current buffer. | |
284f4730 | 3106 | |
f4255cd1 JB |
3107 | If the user switches frames in the midst of a key sequence, we put |
3108 | off the switch-frame event until later; the next call to | |
3109 | read_char will return it. */ | |
284f4730 JB |
3110 | static int |
3111 | read_key_sequence (keybuf, bufsize, prompt) | |
3112 | Lisp_Object *keybuf; | |
3113 | int bufsize; | |
f4255cd1 | 3114 | char *prompt; |
284f4730 | 3115 | { |
f4255cd1 JB |
3116 | int count = specpdl_ptr - specpdl; |
3117 | ||
284f4730 JB |
3118 | /* How many keys there are in the current key sequence. */ |
3119 | int t; | |
3120 | ||
284f4730 JB |
3121 | /* The length of the echo buffer when we started reading, and |
3122 | the length of this_command_keys when we started reading. */ | |
3123 | int echo_start; | |
f4255cd1 | 3124 | int keys_start; |
284f4730 JB |
3125 | |
3126 | /* The number of keymaps we're scanning right now, and the number of | |
3127 | keymaps we have allocated space for. */ | |
3128 | int nmaps; | |
3129 | int nmaps_allocated = 0; | |
3130 | ||
284f4730 JB |
3131 | /* defs[0..nmaps-1] are the definitions of KEYBUF[0..t-1] in |
3132 | the current keymaps. */ | |
3133 | Lisp_Object *defs; | |
3134 | ||
f4255cd1 JB |
3135 | /* submaps[0..nmaps-1] are the prefix definitions of KEYBUF[0..t-1] |
3136 | in the current keymaps, or nil where it is not a prefix. */ | |
3137 | Lisp_Object *submaps; | |
3138 | ||
3139 | /* The index in defs[] of the first keymap that has a binding for | |
3140 | this key sequence. In other words, the lowest i such that | |
3141 | defs[i] is non-nil. */ | |
284f4730 JB |
3142 | int first_binding; |
3143 | ||
f4255cd1 | 3144 | /* If t < mock_input, then KEYBUF[t] should be read as the next |
253598e4 JB |
3145 | input key. |
3146 | ||
3147 | We use this to recover after recognizing a function key. Once we | |
3148 | realize that a suffix of the current key sequence is actually a | |
3149 | function key's escape sequence, we replace the suffix with the | |
3150 | function key's binding from Vfunction_key_map. Now keybuf | |
f4255cd1 JB |
3151 | contains a new and different key sequence, so the echo area, |
3152 | this_command_keys, and the submaps and defs arrays are wrong. In | |
3153 | this situation, we set mock_input to t, set t to 0, and jump to | |
3154 | restart_sequence; the loop will read keys from keybuf up until | |
3155 | mock_input, thus rebuilding the state; and then it will resume | |
3156 | reading characters from the keyboard. */ | |
284f4730 JB |
3157 | int mock_input = 0; |
3158 | ||
253598e4 | 3159 | /* If the sequence is unbound in submaps[], then |
f4255cd1 JB |
3160 | keybuf[fkey_start..fkey_end-1] is a prefix in Vfunction_key_map, |
3161 | and fkey_map is its binding. | |
253598e4 | 3162 | |
f4255cd1 JB |
3163 | These might be > t, indicating that all function key scanning |
3164 | should hold off until t reaches them. We do this when we've just | |
3165 | recognized a function key, to avoid searching for the function | |
3166 | key's again in Vfunction_key_map. */ | |
284f4730 JB |
3167 | int fkey_start = 0, fkey_end = 0; |
3168 | Lisp_Object fkey_map = Vfunction_key_map; | |
3169 | ||
cd21b839 JB |
3170 | /* If we receive a ``switch-frame'' event in the middle of a key sequence, |
3171 | we put it off for later. While we're reading, we keep the event here. */ | |
3172 | Lisp_Object delayed_switch_frame = Qnil; | |
3173 | ||
f4255cd1 JB |
3174 | |
3175 | /* If there is no function key map, turn off function key scanning. */ | |
3176 | if (NILP (Fkeymapp (Vfunction_key_map))) | |
3177 | fkey_start = fkey_end = bufsize + 1; | |
3178 | ||
3179 | /* We need to save the current buffer in case we switch buffers to | |
8f805655 JB |
3180 | find the right binding for a mouse click. Note that we can't use |
3181 | save_excursion_{save,restore} here, because they save point as | |
3182 | well as the current buffer; we don't want to save point, because | |
3183 | redisplay may change it, to accomodate a Fset_window_start or | |
3184 | something. */ | |
3185 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
f4255cd1 | 3186 | |
7d6de002 RS |
3187 | last_nonmenu_event = Qnil; |
3188 | ||
284f4730 JB |
3189 | if (INTERACTIVE) |
3190 | { | |
3191 | if (prompt) | |
3192 | echo_prompt (prompt); | |
3193 | else if (cursor_in_echo_area) | |
3194 | /* This doesn't put in a dash if the echo buffer is empty, so | |
3195 | you don't always see a dash hanging out in the minibuffer. */ | |
3196 | echo_dash (); | |
284f4730 JB |
3197 | } |
3198 | ||
f4255cd1 JB |
3199 | /* Record the initial state of the echo area and this_command_keys; |
3200 | we will need to restore them if we replay a key sequence. */ | |
0a7f1fc0 | 3201 | if (INTERACTIVE) |
f4255cd1 JB |
3202 | echo_start = echo_length (); |
3203 | keys_start = this_command_key_count; | |
0a7f1fc0 | 3204 | |
7b4aedb9 JB |
3205 | /* We jump here when the key sequence has been thoroughly changed, and |
3206 | we need to rescan it starting from the beginning. When we jump here, | |
3207 | keybuf[0..mock_input] holds the sequence we should reread. */ | |
07d2b8de | 3208 | replay_sequence: |
7b4aedb9 | 3209 | |
f4255cd1 | 3210 | /* Build our list of keymaps. |
07d2b8de JB |
3211 | If we recognize a function key and replace its escape sequence in |
3212 | keybuf with its symbol, or if the sequence starts with a mouse | |
3213 | click and we need to switch buffers, we jump back here to rebuild | |
3214 | the initial keymaps from the current buffer. */ | |
284f4730 JB |
3215 | { |
3216 | Lisp_Object *maps; | |
3217 | ||
3218 | nmaps = current_minor_maps (0, &maps) + 2; | |
3219 | if (nmaps > nmaps_allocated) | |
3220 | { | |
253598e4 | 3221 | submaps = (Lisp_Object *) alloca (nmaps * sizeof (submaps[0])); |
284f4730 JB |
3222 | defs = (Lisp_Object *) alloca (nmaps * sizeof (defs[0])); |
3223 | nmaps_allocated = nmaps; | |
3224 | } | |
253598e4 | 3225 | bcopy (maps, submaps, (nmaps - 2) * sizeof (submaps[0])); |
f4255cd1 | 3226 | submaps[nmaps-2] = current_buffer->keymap; |
253598e4 | 3227 | submaps[nmaps-1] = global_map; |
284f4730 JB |
3228 | } |
3229 | ||
3230 | /* Find an accurate initial value for first_binding. */ | |
3231 | for (first_binding = 0; first_binding < nmaps; first_binding++) | |
253598e4 | 3232 | if (! NILP (submaps[first_binding])) |
284f4730 JB |
3233 | break; |
3234 | ||
f4255cd1 JB |
3235 | /* We jump here when a function key substitution has forced us to |
3236 | reprocess the current key sequence. keybuf[0..mock_input] is the | |
3237 | sequence we want to reread. */ | |
3238 | t = 0; | |
3239 | ||
3240 | /* These are no-ops the first time through, but if we restart, they | |
3241 | revert the echo area and this_command_keys to their original state. */ | |
3242 | this_command_key_count = keys_start; | |
3243 | if (INTERACTIVE) | |
3244 | echo_truncate (echo_start); | |
3245 | ||
3246 | /* If the best binding for the current key sequence is a keymap, | |
3247 | or we may be looking at a function key's escape sequence, keep | |
3248 | on reading. */ | |
253598e4 | 3249 | while ((first_binding < nmaps && ! NILP (submaps[first_binding])) |
284f4730 JB |
3250 | || (first_binding >= nmaps && fkey_start < t)) |
3251 | { | |
3252 | Lisp_Object key; | |
7d6de002 | 3253 | int used_mouse_menu = 0; |
284f4730 | 3254 | |
7b4aedb9 JB |
3255 | /* Where the last real key started. If we need to throw away a |
3256 | key that has expanded into more than one element of keybuf | |
3257 | (say, a mouse click on the mode line which is being treated | |
3258 | as [mode-line (mouse-...)], then we backtrack to this point | |
3259 | of keybuf. */ | |
3260 | int last_real_key_start; | |
3261 | ||
0a7f1fc0 JB |
3262 | /* These variables are analogous to echo_start and keys_start; |
3263 | while those allow us to restart the entire key sequence, | |
3264 | echo_local_start and keys_local_start allow us to throw away | |
3265 | just one key. */ | |
f4255cd1 JB |
3266 | int echo_local_start, keys_local_start, local_first_binding; |
3267 | ||
284f4730 JB |
3268 | if (t >= bufsize) |
3269 | error ("key sequence too long"); | |
3270 | ||
f4255cd1 JB |
3271 | if (INTERACTIVE) |
3272 | echo_local_start = echo_length (); | |
3273 | keys_local_start = this_command_key_count; | |
3274 | local_first_binding = first_binding; | |
3275 | ||
3276 | replay_key: | |
0a7f1fc0 | 3277 | /* These are no-ops, unless we throw away a keystroke below and |
f4255cd1 JB |
3278 | jumped back up to replay_key; in that case, these restore the |
3279 | variables to their original state, allowing us to replay the | |
0a7f1fc0 | 3280 | loop. */ |
f4255cd1 JB |
3281 | if (INTERACTIVE) |
3282 | echo_truncate (echo_local_start); | |
0a7f1fc0 JB |
3283 | this_command_key_count = keys_local_start; |
3284 | first_binding = local_first_binding; | |
3285 | ||
f4255cd1 | 3286 | /* Does mock_input indicate that we are re-reading a key sequence? */ |
284f4730 JB |
3287 | if (t < mock_input) |
3288 | { | |
3289 | key = keybuf[t]; | |
3290 | add_command_key (key); | |
3291 | echo_char (key); | |
3292 | } | |
253598e4 JB |
3293 | |
3294 | /* If not, we should actually read a character. */ | |
284f4730 JB |
3295 | else |
3296 | { | |
7b4aedb9 JB |
3297 | last_real_key_start = t; |
3298 | ||
7d6de002 RS |
3299 | key = read_char (!prompt, nmaps, submaps, last_nonmenu_event, |
3300 | &used_mouse_menu); | |
284f4730 | 3301 | |
f4255cd1 | 3302 | /* read_char returns -1 at the end of a macro. |
284f4730 JB |
3303 | Emacs 18 handles this by returning immediately with a |
3304 | zero, so that's what we'll do. */ | |
86e5706b | 3305 | if (XTYPE (key) == Lisp_Int && XINT (key) == -1) |
cd21b839 | 3306 | { |
f4255cd1 JB |
3307 | t = 0; |
3308 | goto done; | |
cd21b839 | 3309 | } |
284f4730 JB |
3310 | |
3311 | Vquit_flag = Qnil; | |
3312 | ||
0a7f1fc0 JB |
3313 | /* Clicks in non-text areas get prefixed by the symbol |
3314 | in their CHAR-ADDRESS field. For example, a click on | |
f4255cd1 JB |
3315 | the mode line is prefixed by the symbol `mode-line'. |
3316 | ||
3317 | Furthermore, key sequences beginning with mouse clicks | |
3318 | are read using the keymaps of the buffer clicked on, not | |
3319 | the current buffer. So we may have to switch the buffer | |
3320 | here. */ | |
cd21b839 | 3321 | if (EVENT_HAS_PARAMETERS (key)) |
0a7f1fc0 | 3322 | { |
cd21b839 | 3323 | Lisp_Object kind = EVENT_HEAD_KIND (EVENT_HEAD (key)); |
f4255cd1 | 3324 | |
cd21b839 | 3325 | if (EQ (kind, Qmouse_click)) |
0a7f1fc0 | 3326 | { |
f4255cd1 JB |
3327 | Lisp_Object window = POSN_WINDOW (EVENT_START (key)); |
3328 | Lisp_Object posn = POSN_BUFFER_POSN (EVENT_START (key)); | |
3329 | ||
3330 | /* Key sequences beginning with mouse clicks are | |
3331 | read using the keymaps in the buffer clicked on, | |
3332 | not the current buffer. If we're at the | |
3333 | beginning of a key sequence, switch buffers. */ | |
3334 | if (t == 0 | |
3335 | && XTYPE (window) == Lisp_Window | |
3336 | && XTYPE (XWINDOW (window)->buffer) == Lisp_Buffer | |
3337 | && XBUFFER (XWINDOW (window)->buffer) != current_buffer) | |
3338 | { | |
3339 | if (XTYPE (posn) == Lisp_Symbol) | |
3340 | { | |
3341 | if (t + 1 >= bufsize) | |
3342 | error ("key sequence too long"); | |
3343 | keybuf[t] = posn; | |
3344 | keybuf[t+1] = key; | |
3345 | mock_input = t + 2; | |
3346 | } | |
3347 | else | |
3348 | { | |
3349 | keybuf[t] = key; | |
3350 | mock_input = t + 1; | |
3351 | } | |
0a7f1fc0 | 3352 | |
f4255cd1 | 3353 | set_buffer_internal (XBUFFER (XWINDOW (window)->buffer)); |
07d2b8de | 3354 | goto replay_sequence; |
f4255cd1 JB |
3355 | } |
3356 | else if (XTYPE (posn) == Lisp_Symbol) | |
cd21b839 JB |
3357 | { |
3358 | if (t + 1 >= bufsize) | |
3359 | error ("key sequence too long"); | |
3360 | keybuf[t] = posn; | |
3361 | keybuf[t+1] = key; | |
3362 | mock_input = t + 2; | |
3363 | ||
f4255cd1 | 3364 | goto replay_key; |
cd21b839 JB |
3365 | } |
3366 | } | |
3367 | else if (EQ (kind, Qswitch_frame)) | |
3368 | { | |
3369 | /* If we're at the beginning of a key sequence, go | |
3370 | ahead and return this event. If we're in the | |
3371 | midst of a key sequence, delay it until the end. */ | |
3372 | if (t > 0) | |
3373 | { | |
3374 | delayed_switch_frame = key; | |
f4255cd1 | 3375 | goto replay_key; |
cd21b839 | 3376 | } |
0a7f1fc0 JB |
3377 | } |
3378 | } | |
284f4730 | 3379 | } |
f4255cd1 JB |
3380 | |
3381 | /* We have finally decided that KEY is something we might want | |
3382 | to look up. */ | |
284f4730 JB |
3383 | first_binding = (follow_key (key, |
3384 | nmaps - first_binding, | |
253598e4 | 3385 | submaps + first_binding, |
284f4730 | 3386 | defs + first_binding, |
253598e4 | 3387 | submaps + first_binding) |
284f4730 | 3388 | + first_binding); |
0a7f1fc0 | 3389 | |
f4255cd1 | 3390 | /* If KEY wasn't bound, we'll try some fallbacks. */ |
0a7f1fc0 JB |
3391 | if (first_binding >= nmaps) |
3392 | { | |
3393 | Lisp_Object head = EVENT_HEAD (key); | |
3394 | ||
3395 | if (XTYPE (head) == Lisp_Symbol) | |
3396 | { | |
3397 | Lisp_Object breakdown = parse_modifiers (head); | |
3398 | Lisp_Object modifiers = | |
3399 | XINT (XCONS (XCONS (breakdown)->cdr)->car); | |
3400 | ||
3401 | /* We drop unbound `down-' events altogether. */ | |
3402 | if (modifiers & down_modifier) | |
3403 | { | |
7b4aedb9 JB |
3404 | /* Dispose of this event by simply jumping back to |
3405 | replay_key, to get another event. | |
3406 | ||
3407 | Note that if this event came from mock input, | |
3408 | then just jumping back to replay_key will just | |
3409 | hand it to us again. So we have to wipe out any | |
3410 | mock input. | |
3411 | ||
3412 | We could delete keybuf[t] and shift everything | |
3413 | after that to the left by one spot, but we'd also | |
3414 | have to fix up any variable that points into | |
3415 | keybuf, and shifting isn't really necessary | |
3416 | anyway. | |
3417 | ||
3418 | Adding prefixes for non-textual mouse clicks | |
3419 | creates two characters of mock input, and both | |
3420 | must be thrown away. If we're only looking at | |
3421 | the prefix now, we can just jump back to | |
3422 | replay_key. On the other hand, if we've already | |
3423 | processed the prefix, and now the actual click | |
3424 | itself is giving us trouble, then we've lost the | |
3425 | state of the keymaps we want to backtrack to, and | |
3426 | we need to replay the whole sequence to rebuild | |
3427 | it. | |
3428 | ||
f4255cd1 JB |
3429 | Beyond that, only function key expansion could |
3430 | create more than two keys, but that should never | |
3431 | generate mouse events, so it's okay to zero | |
3432 | mock_input in that case too. | |
7b4aedb9 | 3433 | |
0a7f1fc0 | 3434 | Isn't this just the most wonderful code ever? */ |
7b4aedb9 JB |
3435 | if (t == last_real_key_start) |
3436 | { | |
3437 | mock_input = 0; | |
3438 | goto replay_key; | |
3439 | } | |
3440 | else | |
3441 | { | |
3442 | mock_input = last_real_key_start; | |
3443 | goto replay_sequence; | |
3444 | } | |
0a7f1fc0 JB |
3445 | } |
3446 | ||
3447 | /* We turn unbound `drag-' events into `click-' | |
3448 | events, if the click would be bound. */ | |
3449 | else if (modifiers & drag_modifier) | |
3450 | { | |
3451 | Lisp_Object new_head = | |
3452 | apply_modifiers (modifiers & ~drag_modifier, | |
3453 | XCONS (breakdown)->car); | |
3454 | Lisp_Object new_click = | |
3455 | Fcons (new_head, Fcons (EVENT_START (key), Qnil)); | |
3456 | ||
3457 | /* Look for a binding for this new key. follow_key | |
3458 | promises that it didn't munge submaps the | |
3459 | last time we called it, since key was unbound. */ | |
3460 | first_binding = | |
3461 | (follow_key (new_click, | |
3462 | nmaps - local_first_binding, | |
3463 | submaps + local_first_binding, | |
3464 | defs + local_first_binding, | |
3465 | submaps + local_first_binding) | |
3466 | + local_first_binding); | |
3467 | ||
3468 | /* If that click is bound, go for it. */ | |
3469 | if (first_binding < nmaps) | |
3470 | key = new_click; | |
3471 | /* Otherwise, we'll leave key set to the drag event. */ | |
3472 | } | |
3473 | } | |
3474 | } | |
3475 | ||
284f4730 | 3476 | keybuf[t++] = key; |
7d6de002 RS |
3477 | /* Normally, last_nonmenu_event gets the previous key we read. |
3478 | But when a mouse popup menu is being used, | |
3479 | we don't update last_nonmenu_event; it continues to hold the mouse | |
3480 | event that preceded the first level of menu. */ | |
3481 | if (!used_mouse_menu) | |
3482 | last_nonmenu_event = key; | |
284f4730 JB |
3483 | |
3484 | /* If the sequence is unbound, see if we can hang a function key | |
253598e4 JB |
3485 | off the end of it. We only want to scan real keyboard input |
3486 | for function key sequences, so if mock_input says that we're | |
f4255cd1 | 3487 | re-reading old events, don't examine it. */ |
284f4730 | 3488 | if (first_binding >= nmaps |
253598e4 | 3489 | && t >= mock_input) |
284f4730 JB |
3490 | { |
3491 | Lisp_Object fkey_next; | |
3492 | ||
3493 | /* Scan from fkey_end until we find a bound suffix. */ | |
3494 | while (fkey_end < t) | |
3495 | { | |
f4255cd1 JB |
3496 | Lisp_Object key; |
3497 | ||
3498 | key = keybuf[fkey_end++]; | |
067ffa38 JB |
3499 | /* Look up meta-characters by prefixing them |
3500 | with meta_prefix_char. I hate this. */ | |
d3cc13fa | 3501 | if (XTYPE (key) == Lisp_Int && XINT (key) & meta_modifier) |
f4255cd1 JB |
3502 | { |
3503 | fkey_next = | |
3504 | get_keymap_1 | |
3505 | (get_keyelt | |
3506 | (access_keymap | |
3507 | (fkey_map, meta_prefix_char, 1)), | |
3508 | 0, 1); | |
d3cc13fa | 3509 | XFASTINT (key) = XFASTINT (key) & ~meta_modifier; |
f4255cd1 | 3510 | } |
067ffa38 JB |
3511 | else |
3512 | fkey_next = fkey_map; | |
3513 | ||
284f4730 | 3514 | fkey_next = |
f4255cd1 | 3515 | get_keyelt (access_keymap (fkey_next, key, 1)); |
067ffa38 | 3516 | |
85bc5181 | 3517 | /* If keybuf[fkey_start..fkey_end] is bound in the |
a764a753 | 3518 | function key map and it's a suffix of the current |
85bc5181 | 3519 | sequence (i.e. fkey_end == t), replace it with |
a764a753 | 3520 | the binding and restart with fkey_start at the end. */ |
284f4730 JB |
3521 | if (XTYPE (fkey_next) == Lisp_Vector |
3522 | && fkey_end == t) | |
3523 | { | |
3524 | t = fkey_start + XVECTOR (fkey_next)->size; | |
3525 | if (t >= bufsize) | |
3526 | error ("key sequence too long"); | |
3527 | ||
3528 | bcopy (XVECTOR (fkey_next)->contents, | |
3529 | keybuf + fkey_start, | |
3530 | (t - fkey_start) * sizeof (keybuf[0])); | |
3531 | ||
3532 | mock_input = t; | |
3533 | fkey_start = fkey_end = t; | |
3534 | ||
f4255cd1 | 3535 | goto replay_sequence; |
284f4730 JB |
3536 | } |
3537 | ||
f4255cd1 | 3538 | fkey_map = get_keymap_1 (fkey_next, 0, 1); |
284f4730 | 3539 | |
a764a753 JB |
3540 | /* If we no longer have a bound suffix, try a new positions for |
3541 | fkey_start. */ | |
284f4730 JB |
3542 | if (NILP (fkey_map)) |
3543 | { | |
3544 | fkey_end = ++fkey_start; | |
3545 | fkey_map = Vfunction_key_map; | |
3546 | } | |
3547 | } | |
3548 | } | |
3549 | } | |
3550 | ||
3551 | read_key_sequence_cmd = (first_binding < nmaps | |
3552 | ? defs[first_binding] | |
3553 | : Qnil); | |
3554 | ||
f4255cd1 | 3555 | done: |
cd21b839 | 3556 | unread_switch_frame = delayed_switch_frame; |
f4255cd1 | 3557 | unbind_to (count, Qnil); |
284f4730 JB |
3558 | return t; |
3559 | } | |
3560 | ||
c0a58692 | 3561 | DEFUN ("read-key-sequence", Fread_key_sequence, Sread_key_sequence, 1, 2, 0, |
284f4730 JB |
3562 | "Read a sequence of keystrokes and return as a string or vector.\n\ |
3563 | The sequence is sufficient to specify a non-prefix command in the\n\ | |
3564 | current local and global maps.\n\ | |
3565 | \n\ | |
c0a58692 RS |
3566 | First arg PROMPT is a prompt string. If nil, do not prompt specially.\n\ |
3567 | Second (optional) arg CONTINUE-ECHO, if non-nil, means this key echos\n\ | |
3568 | as a continuation of the previous key.\n\ | |
284f4730 | 3569 | \n\ |
cb5df6ae JB |
3570 | A C-g typed while in this function is treated like any other character,\n\ |
3571 | and `quit-flag' is not set.\n\ | |
3572 | \n\ | |
3573 | If the key sequence starts with a mouse click, then the sequence is read\n\ | |
3574 | using the keymaps of the buffer of the window clicked in, not the buffer\n\ | |
3575 | of the selected window as normal.\n\ | |
3576 | \n\ | |
3577 | `read-key-sequence' drops unbound button-down events, since you normally\n\ | |
3578 | only care about the click or drag events which follow them. If a drag\n\ | |
3579 | event is unbound, but the corresponding click event would be bound,\n\ | |
3580 | `read-key-sequence' turns the drag event into a click event at the\n\ | |
3581 | drag's starting position. This means that you don't have to distinguish\n\ | |
3582 | between click and drag events unless you want to.\n\ | |
3583 | \n\ | |
3584 | `read-key-sequence' prefixes mouse events on mode lines, the vertical\n\ | |
3c370943 JB |
3585 | lines separating windows, and scroll bars with imaginary keys\n\ |
3586 | `mode-line', `vertical-line', and `vertical-scroll-bar'.\n\ | |
cb5df6ae JB |
3587 | \n\ |
3588 | If the user switches frames in the middle of a key sequence, the\n\ | |
3589 | frame-switch event is put off until after the current key sequence.\n\ | |
3590 | \n\ | |
3591 | `read-key-sequence' checks `function-key-map' for function key\n\ | |
3592 | sequences, where they wouldn't conflict with ordinary bindings. See\n\ | |
4bb994d1 | 3593 | `function-key-map' for more details.") |
c0a58692 RS |
3594 | (prompt, continue_echo) |
3595 | Lisp_Object prompt, continue_echo; | |
284f4730 JB |
3596 | { |
3597 | Lisp_Object keybuf[30]; | |
3598 | register int i; | |
3599 | struct gcpro gcpro1, gcpro2; | |
3600 | ||
3601 | if (!NILP (prompt)) | |
3602 | CHECK_STRING (prompt, 0); | |
3603 | QUIT; | |
3604 | ||
3605 | bzero (keybuf, sizeof keybuf); | |
3606 | GCPRO1 (keybuf[0]); | |
3607 | gcpro1.nvars = (sizeof keybuf/sizeof (keybuf[0])); | |
3608 | ||
daa37602 | 3609 | if (NILP (continue_echo)) |
c0a58692 RS |
3610 | this_command_key_count = 0; |
3611 | ||
284f4730 | 3612 | i = read_key_sequence (keybuf, (sizeof keybuf/sizeof (keybuf[0])), |
f4255cd1 | 3613 | NILP (prompt) ? 0 : XSTRING (prompt)->data); |
284f4730 JB |
3614 | |
3615 | UNGCPRO; | |
86e5706b | 3616 | return make_event_array (i, keybuf); |
284f4730 JB |
3617 | } |
3618 | \f | |
3619 | DEFUN ("command-execute", Fcommand_execute, Scommand_execute, 1, 2, 0, | |
3620 | "Execute CMD as an editor command.\n\ | |
3621 | CMD must be a symbol that satisfies the `commandp' predicate.\n\ | |
3622 | Optional second arg RECORD-FLAG non-nil\n\ | |
3623 | means unconditionally put this command in `command-history'.\n\ | |
3624 | Otherwise, that is done only if an arg is read using the minibuffer.") | |
3625 | (cmd, record) | |
3626 | Lisp_Object cmd, record; | |
3627 | { | |
3628 | register Lisp_Object final; | |
3629 | register Lisp_Object tem; | |
3630 | Lisp_Object prefixarg; | |
3631 | struct backtrace backtrace; | |
3632 | extern int debug_on_next_call; | |
3633 | ||
3634 | prefixarg = Vprefix_arg, Vprefix_arg = Qnil; | |
3635 | Vcurrent_prefix_arg = prefixarg; | |
3636 | debug_on_next_call = 0; | |
3637 | ||
3638 | if (XTYPE (cmd) == Lisp_Symbol) | |
3639 | { | |
3640 | tem = Fget (cmd, Qdisabled); | |
3641 | if (!NILP (tem)) | |
3642 | return call1 (Vrun_hooks, Vdisabled_command_hook); | |
3643 | } | |
3644 | ||
3645 | while (1) | |
3646 | { | |
ffd56f97 | 3647 | final = Findirect_function (cmd); |
284f4730 JB |
3648 | |
3649 | if (CONSP (final) && (tem = Fcar (final), EQ (tem, Qautoload))) | |
3650 | do_autoload (final, cmd); | |
3651 | else | |
3652 | break; | |
3653 | } | |
3654 | ||
3655 | if (XTYPE (final) == Lisp_String | |
3656 | || XTYPE (final) == Lisp_Vector) | |
3657 | { | |
3658 | /* If requested, place the macro in the command history. For | |
3659 | other sorts of commands, call-interactively takes care of | |
3660 | this. */ | |
3661 | if (!NILP (record)) | |
3662 | Vcommand_history | |
3663 | = Fcons (Fcons (Qexecute_kbd_macro, | |
3664 | Fcons (final, Fcons (prefixarg, Qnil))), | |
3665 | Vcommand_history); | |
3666 | ||
3667 | return Fexecute_kbd_macro (final, prefixarg); | |
3668 | } | |
3669 | if (CONSP (final) || XTYPE (final) == Lisp_Subr | |
3670 | || XTYPE (final) == Lisp_Compiled) | |
3671 | { | |
3672 | backtrace.next = backtrace_list; | |
3673 | backtrace_list = &backtrace; | |
3674 | backtrace.function = &Qcall_interactively; | |
3675 | backtrace.args = &cmd; | |
3676 | backtrace.nargs = 1; | |
3677 | backtrace.evalargs = 0; | |
3678 | ||
3679 | tem = Fcall_interactively (cmd, record); | |
3680 | ||
3681 | backtrace_list = backtrace.next; | |
3682 | return tem; | |
3683 | } | |
3684 | return Qnil; | |
3685 | } | |
3686 | \f | |
284f4730 JB |
3687 | DEFUN ("execute-extended-command", Fexecute_extended_command, Sexecute_extended_command, |
3688 | 1, 1, "P", | |
3689 | "Read function name, then read its arguments and call it.") | |
3690 | (prefixarg) | |
3691 | Lisp_Object prefixarg; | |
3692 | { | |
3693 | Lisp_Object function; | |
3694 | char buf[40]; | |
3695 | Lisp_Object saved_keys; | |
3696 | struct gcpro gcpro1; | |
3697 | ||
3698 | saved_keys = Fthis_command_keys (); | |
3699 | buf[0] = 0; | |
3700 | GCPRO1 (saved_keys); | |
3701 | ||
3702 | if (EQ (prefixarg, Qminus)) | |
3703 | strcpy (buf, "- "); | |
3704 | else if (CONSP (prefixarg) && XINT (XCONS (prefixarg)->car) == 4) | |
3705 | strcpy (buf, "C-u "); | |
3706 | else if (CONSP (prefixarg) && XTYPE (XCONS (prefixarg)->car) == Lisp_Int) | |
3707 | sprintf (buf, "%d ", XINT (XCONS (prefixarg)->car)); | |
3708 | else if (XTYPE (prefixarg) == Lisp_Int) | |
3709 | sprintf (buf, "%d ", XINT (prefixarg)); | |
3710 | ||
3711 | /* This isn't strictly correct if execute-extended-command | |
3712 | is bound to anything else. Perhaps it should use | |
3713 | this_command_keys? */ | |
3714 | strcat (buf, "M-x "); | |
3715 | ||
3716 | /* Prompt with buf, and then read a string, completing from and | |
3717 | restricting to the set of all defined commands. Don't provide | |
3718 | any initial input. The last Qnil says not to perform a | |
3719 | peculiar hack on the initial input. */ | |
3720 | function = Fcompleting_read (build_string (buf), | |
3721 | Vobarray, Qcommandp, | |
3722 | Qt, Qnil, Qnil); | |
3723 | ||
1113d9db JB |
3724 | /* Set this_command_keys to the concatenation of saved_keys and |
3725 | function, followed by a RET. */ | |
284f4730 | 3726 | { |
1113d9db | 3727 | struct Lisp_String *str; |
284f4730 JB |
3728 | int i; |
3729 | Lisp_Object tem; | |
3730 | ||
1113d9db JB |
3731 | this_command_key_count = 0; |
3732 | ||
3733 | str = XSTRING (saved_keys); | |
3734 | for (i = 0; i < str->size; i++) | |
284f4730 | 3735 | { |
1113d9db | 3736 | XFASTINT (tem) = str->data[i]; |
284f4730 JB |
3737 | add_command_key (tem); |
3738 | } | |
1113d9db JB |
3739 | |
3740 | str = XSTRING (function); | |
3741 | for (i = 0; i < str->size; i++) | |
3742 | { | |
3743 | XFASTINT (tem) = str->data[i]; | |
3744 | add_command_key (tem); | |
3745 | } | |
3746 | ||
3747 | XFASTINT (tem) = '\015'; | |
3748 | add_command_key (tem); | |
284f4730 JB |
3749 | } |
3750 | ||
3751 | UNGCPRO; | |
3752 | ||
0a7f1fc0 | 3753 | function = Fintern (function, Qnil); |
284f4730 JB |
3754 | Vprefix_arg = prefixarg; |
3755 | this_command = function; | |
3756 | ||
3757 | return Fcommand_execute (function, Qt); | |
3758 | } | |
3759 | \f | |
3760 | ||
3761 | detect_input_pending () | |
3762 | { | |
3763 | if (!input_pending) | |
3764 | get_input_pending (&input_pending); | |
3765 | ||
3766 | return input_pending; | |
3767 | } | |
3768 | ||
ffd56f97 JB |
3769 | /* This is called in some cases before a possible quit. |
3770 | It cases the next call to detect_input_pending to recompute input_pending. | |
3771 | So calling this function unnecessarily can't do any harm. */ | |
3772 | clear_input_pending () | |
3773 | { | |
3774 | input_pending = 0; | |
3775 | } | |
3776 | ||
284f4730 JB |
3777 | DEFUN ("input-pending-p", Finput_pending_p, Sinput_pending_p, 0, 0, 0, |
3778 | "T if command input is currently available with no waiting.\n\ | |
3779 | Actually, the value is nil only if we can be sure that no input is available.") | |
3780 | () | |
3781 | { | |
86e5706b | 3782 | if (!NILP (unread_command_events) || unread_command_char != -1) |
284f4730 JB |
3783 | return (Qt); |
3784 | ||
3785 | return detect_input_pending () ? Qt : Qnil; | |
3786 | } | |
3787 | ||
3788 | DEFUN ("recent-keys", Frecent_keys, Srecent_keys, 0, 0, 0, | |
22d7cb89 | 3789 | "Return vector of last 100 events, not counting those from keyboard macros.") |
284f4730 JB |
3790 | () |
3791 | { | |
5160df46 | 3792 | Lisp_Object *keys = XVECTOR (recent_keys)->contents; |
284f4730 JB |
3793 | Lisp_Object val; |
3794 | ||
3795 | if (total_keys < NUM_RECENT_KEYS) | |
5160df46 | 3796 | return Fvector (total_keys, keys); |
284f4730 JB |
3797 | else |
3798 | { | |
5160df46 JB |
3799 | val = Fvector (NUM_RECENT_KEYS, keys); |
3800 | bcopy (keys + recent_keys_index, | |
284f4730 JB |
3801 | XVECTOR (val)->contents, |
3802 | (NUM_RECENT_KEYS - recent_keys_index) * sizeof (Lisp_Object)); | |
5160df46 | 3803 | bcopy (keys, |
284f4730 JB |
3804 | XVECTOR (val)->contents + NUM_RECENT_KEYS - recent_keys_index, |
3805 | recent_keys_index * sizeof (Lisp_Object)); | |
3806 | return val; | |
3807 | } | |
3808 | } | |
3809 | ||
3810 | DEFUN ("this-command-keys", Fthis_command_keys, Sthis_command_keys, 0, 0, 0, | |
3811 | "Return string of the keystrokes that invoked this command.") | |
3812 | () | |
3813 | { | |
86e5706b RS |
3814 | return make_event_array (this_command_key_count, |
3815 | XVECTOR (this_command_keys)->contents); | |
284f4730 JB |
3816 | } |
3817 | ||
3818 | DEFUN ("recursion-depth", Frecursion_depth, Srecursion_depth, 0, 0, 0, | |
3819 | "Return the current depth in recursive edits.") | |
3820 | () | |
3821 | { | |
3822 | Lisp_Object temp; | |
3823 | XFASTINT (temp) = command_loop_level + minibuf_level; | |
3824 | return temp; | |
3825 | } | |
3826 | ||
3827 | DEFUN ("open-dribble-file", Fopen_dribble_file, Sopen_dribble_file, 1, 1, | |
3828 | "FOpen dribble file: ", | |
9b2471df RS |
3829 | "Start writing all keyboard characters to a dribble file called FILE.\n\ |
3830 | If FILE is nil, close any open dribble file.") | |
284f4730 JB |
3831 | (file) |
3832 | Lisp_Object file; | |
3833 | { | |
3834 | if (NILP (file)) | |
3835 | { | |
3836 | fclose (dribble); | |
3837 | dribble = 0; | |
3838 | } | |
3839 | else | |
3840 | { | |
3841 | file = Fexpand_file_name (file, Qnil); | |
3842 | dribble = fopen (XSTRING (file)->data, "w"); | |
3843 | } | |
3844 | return Qnil; | |
3845 | } | |
3846 | ||
3847 | DEFUN ("discard-input", Fdiscard_input, Sdiscard_input, 0, 0, 0, | |
3848 | "Discard the contents of the terminal input buffer.\n\ | |
3849 | Also cancel any kbd macro being defined.") | |
3850 | () | |
3851 | { | |
3852 | defining_kbd_macro = 0; | |
3853 | update_mode_lines++; | |
3854 | ||
dbc4e1c1 | 3855 | unread_command_events = Qnil; |
86e5706b | 3856 | unread_command_char = -1; |
284f4730 JB |
3857 | |
3858 | discard_tty_input (); | |
3859 | ||
ff0b5f4c JB |
3860 | /* Without the cast, GCC complains that this assignment loses the |
3861 | volatile qualifier of kbd_store_ptr. Is there anything wrong | |
3862 | with that? */ | |
3863 | kbd_fetch_ptr = (struct input_event *) kbd_store_ptr; | |
7b4aedb9 | 3864 | Ffillarray (kbd_buffer_frame_or_window, Qnil); |
284f4730 JB |
3865 | input_pending = 0; |
3866 | ||
3867 | return Qnil; | |
3868 | } | |
3869 | \f | |
3870 | DEFUN ("suspend-emacs", Fsuspend_emacs, Ssuspend_emacs, 0, 1, "", | |
3871 | "Stop Emacs and return to superior process. You can resume later.\n\ | |
3872 | On systems that don't have job control, run a subshell instead.\n\n\ | |
3873 | If optional arg STUFFSTRING is non-nil, its characters are stuffed\n\ | |
b7d2ebbf RS |
3874 | to be read as terminal input by Emacs's parent, after suspension.\n\ |
3875 | \n\ | |
3876 | Before suspending, call the functions in `suspend-hooks' with no args.\n\ | |
3877 | If any of them returns nil, don't call the rest and don't suspend.\n\ | |
3878 | Otherwise, suspend normally and after resumption run the normal hook\n\ | |
284f4730 JB |
3879 | `suspend-resume-hook' if that is bound and non-nil.\n\ |
3880 | \n\ | |
3881 | Some operating systems cannot stop the Emacs process and resume it later.\n\ | |
b7d2ebbf | 3882 | On such systems, Emacs starts a subshell instead of suspending.") |
284f4730 JB |
3883 | (stuffstring) |
3884 | Lisp_Object stuffstring; | |
3885 | { | |
3a69360c | 3886 | Lisp_Object tem; |
284f4730 JB |
3887 | int count = specpdl_ptr - specpdl; |
3888 | int old_height, old_width; | |
3889 | int width, height; | |
b7d2ebbf | 3890 | struct gcpro gcpro1, gcpro2; |
284f4730 JB |
3891 | extern init_sys_modes (); |
3892 | ||
3893 | if (!NILP (stuffstring)) | |
3894 | CHECK_STRING (stuffstring, 0); | |
284f4730 | 3895 | |
b7d2ebbf RS |
3896 | /* Run the functions in suspend-hooks. */ |
3897 | tem = Fsymbol_value (intern ("suspend-hooks")); | |
3898 | while (CONSP (tem)) | |
284f4730 | 3899 | { |
b7d2ebbf RS |
3900 | Lisp_Object val; |
3901 | GCPRO2 (stuffstring, tem); | |
3902 | val = call0 (Fcar (tem)); | |
3903 | UNGCPRO; | |
3904 | tem = Fcdr (tem); | |
3905 | if (!EQ (val, Qnil)) return Qnil; | |
284f4730 JB |
3906 | } |
3907 | ||
b7d2ebbf | 3908 | GCPRO1 (stuffstring); |
ff11dfa1 | 3909 | get_frame_size (&old_width, &old_height); |
284f4730 JB |
3910 | reset_sys_modes (); |
3911 | /* sys_suspend can get an error if it tries to fork a subshell | |
3912 | and the system resources aren't available for that. */ | |
3913 | record_unwind_protect (init_sys_modes, 0); | |
3914 | stuff_buffered_input (stuffstring); | |
3915 | sys_suspend (); | |
3916 | unbind_to (count, Qnil); | |
3917 | ||
3918 | /* Check if terminal/window size has changed. | |
3919 | Note that this is not useful when we are running directly | |
3920 | with a window system; but suspend should be disabled in that case. */ | |
ff11dfa1 | 3921 | get_frame_size (&width, &height); |
284f4730 | 3922 | if (width != old_width || height != old_height) |
d5045cf9 | 3923 | change_frame_size (0, height, width, 0, 0); |
284f4730 JB |
3924 | |
3925 | /* Call value of suspend-resume-hook | |
3926 | if it is bound and value is non-nil. */ | |
3927 | if (!NILP (Vrun_hooks)) | |
3928 | call1 (Vrun_hooks, intern ("suspend-resume-hook")); | |
3929 | ||
3930 | UNGCPRO; | |
3931 | return Qnil; | |
3932 | } | |
3933 | ||
3934 | /* If STUFFSTRING is a string, stuff its contents as pending terminal input. | |
3935 | Then in any case stuff anthing Emacs has read ahead and not used. */ | |
3936 | ||
3937 | stuff_buffered_input (stuffstring) | |
3938 | Lisp_Object stuffstring; | |
3939 | { | |
3940 | register unsigned char *p; | |
3941 | ||
3942 | /* stuff_char works only in BSD, versions 4.2 and up. */ | |
3943 | #ifdef BSD | |
3944 | #ifndef BSD4_1 | |
3945 | if (XTYPE (stuffstring) == Lisp_String) | |
3946 | { | |
3947 | register int count; | |
3948 | ||
3949 | p = XSTRING (stuffstring)->data; | |
3950 | count = XSTRING (stuffstring)->size; | |
3951 | while (count-- > 0) | |
3952 | stuff_char (*p++); | |
3953 | stuff_char ('\n'); | |
3954 | } | |
3955 | /* Anything we have read ahead, put back for the shell to read. */ | |
3956 | while (kbd_fetch_ptr != kbd_store_ptr) | |
3957 | { | |
3958 | if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE) | |
3959 | kbd_fetch_ptr = kbd_buffer; | |
3960 | if (kbd_fetch_ptr->kind == ascii_keystroke) | |
3961 | stuff_char (XINT (kbd_fetch_ptr->code)); | |
4bb994d1 | 3962 | kbd_fetch_ptr->kind = no_event; |
7b4aedb9 JB |
3963 | (XVECTOR (kbd_buffer_frame_or_window)->contents[kbd_fetch_ptr |
3964 | - kbd_buffer] | |
3965 | = Qnil); | |
284f4730 JB |
3966 | kbd_fetch_ptr++; |
3967 | } | |
3968 | input_pending = 0; | |
3969 | #endif | |
3970 | #endif /* BSD and not BSD4_1 */ | |
3971 | } | |
3972 | \f | |
ffd56f97 JB |
3973 | set_waiting_for_input (time_to_clear) |
3974 | EMACS_TIME *time_to_clear; | |
284f4730 | 3975 | { |
ffd56f97 | 3976 | input_available_clear_time = time_to_clear; |
284f4730 JB |
3977 | |
3978 | /* Tell interrupt_signal to throw back to read_char, */ | |
3979 | waiting_for_input = 1; | |
3980 | ||
3981 | /* If interrupt_signal was called before and buffered a C-g, | |
3982 | make it run again now, to avoid timing error. */ | |
3983 | if (!NILP (Vquit_flag)) | |
3984 | quit_throw_to_read_char (); | |
3985 | ||
3986 | /* If alarm has gone off already, echo now. */ | |
3987 | if (echo_flag) | |
3988 | { | |
3989 | echo (); | |
3990 | echo_flag = 0; | |
3991 | } | |
3992 | } | |
3993 | ||
3994 | clear_waiting_for_input () | |
3995 | { | |
3996 | /* Tell interrupt_signal not to throw back to read_char, */ | |
3997 | waiting_for_input = 0; | |
ffd56f97 | 3998 | input_available_clear_time = 0; |
284f4730 JB |
3999 | } |
4000 | ||
4001 | /* This routine is called at interrupt level in response to C-G. | |
4002 | If interrupt_input, this is the handler for SIGINT. | |
4003 | Otherwise, it is called from kbd_buffer_store_event, | |
4004 | in handling SIGIO or SIGTINT. | |
4005 | ||
4006 | If `waiting_for_input' is non zero, then unless `echoing' is nonzero, | |
4007 | immediately throw back to read_char. | |
4008 | ||
4009 | Otherwise it sets the Lisp variable quit-flag not-nil. | |
4010 | This causes eval to throw, when it gets a chance. | |
4011 | If quit-flag is already non-nil, it stops the job right away. */ | |
4012 | ||
4013 | SIGTYPE | |
4014 | interrupt_signal () | |
4015 | { | |
4016 | char c; | |
4017 | /* Must preserve main program's value of errno. */ | |
4018 | int old_errno = errno; | |
4019 | extern Lisp_Object Vwindow_system; | |
4020 | ||
4021 | #ifdef USG | |
4022 | /* USG systems forget handlers when they are used; | |
4023 | must reestablish each time */ | |
4024 | signal (SIGINT, interrupt_signal); | |
4025 | signal (SIGQUIT, interrupt_signal); | |
4026 | #endif /* USG */ | |
4027 | ||
4028 | cancel_echoing (); | |
4029 | ||
d5045cf9 | 4030 | if (!NILP (Vquit_flag) && FRAME_TERMCAP_P (selected_frame)) |
284f4730 JB |
4031 | { |
4032 | fflush (stdout); | |
4033 | reset_sys_modes (); | |
4034 | sigfree (); | |
4035 | #ifdef SIGTSTP /* Support possible in later USG versions */ | |
4036 | /* | |
4037 | * On systems which can suspend the current process and return to the original | |
4038 | * shell, this command causes the user to end up back at the shell. | |
4039 | * The "Auto-save" and "Abort" questions are not asked until | |
4040 | * the user elects to return to emacs, at which point he can save the current | |
4041 | * job and either dump core or continue. | |
4042 | */ | |
4043 | sys_suspend (); | |
4044 | #else | |
4045 | #ifdef VMS | |
4046 | if (sys_suspend () == -1) | |
4047 | { | |
4048 | printf ("Not running as a subprocess;\n"); | |
4049 | printf ("you can continue or abort.\n"); | |
4050 | } | |
4051 | #else /* not VMS */ | |
4052 | /* Perhaps should really fork an inferior shell? | |
4053 | But that would not provide any way to get back | |
4054 | to the original shell, ever. */ | |
4055 | printf ("No support for stopping a process on this operating system;\n"); | |
4056 | printf ("you can continue or abort.\n"); | |
4057 | #endif /* not VMS */ | |
4058 | #endif /* not SIGTSTP */ | |
4059 | printf ("Auto-save? (y or n) "); | |
4060 | fflush (stdout); | |
4061 | if (((c = getchar ()) & ~040) == 'Y') | |
4062 | Fdo_auto_save (Qnil, Qnil); | |
4063 | while (c != '\n') c = getchar (); | |
4064 | #ifdef VMS | |
4065 | printf ("Abort (and enter debugger)? (y or n) "); | |
4066 | #else /* not VMS */ | |
4067 | printf ("Abort (and dump core)? (y or n) "); | |
4068 | #endif /* not VMS */ | |
4069 | fflush (stdout); | |
4070 | if (((c = getchar ()) & ~040) == 'Y') | |
4071 | abort (); | |
4072 | while (c != '\n') c = getchar (); | |
4073 | printf ("Continuing...\n"); | |
4074 | fflush (stdout); | |
4075 | init_sys_modes (); | |
4076 | } | |
4077 | else | |
4078 | { | |
4079 | /* If executing a function that wants to be interrupted out of | |
4080 | and the user has not deferred quitting by binding `inhibit-quit' | |
4081 | then quit right away. */ | |
4082 | if (immediate_quit && NILP (Vinhibit_quit)) | |
4083 | { | |
4084 | immediate_quit = 0; | |
4085 | sigfree (); | |
4086 | Fsignal (Qquit, Qnil); | |
4087 | } | |
4088 | else | |
4089 | /* Else request quit when it's safe */ | |
4090 | Vquit_flag = Qt; | |
4091 | } | |
4092 | ||
4093 | if (waiting_for_input && !echoing) | |
4094 | quit_throw_to_read_char (); | |
4095 | ||
4096 | errno = old_errno; | |
4097 | } | |
4098 | ||
4099 | /* Handle a C-g by making read_char return C-g. */ | |
4100 | ||
4101 | quit_throw_to_read_char () | |
4102 | { | |
4103 | quit_error_check (); | |
4104 | sigfree (); | |
4105 | /* Prevent another signal from doing this before we finish. */ | |
f76475ad | 4106 | clear_waiting_for_input (); |
284f4730 JB |
4107 | input_pending = 0; |
4108 | ||
dbc4e1c1 | 4109 | unread_command_events = Qnil; |
86e5706b | 4110 | unread_command_char = -1; |
284f4730 JB |
4111 | |
4112 | _longjmp (getcjmp, 1); | |
4113 | } | |
4114 | \f | |
4115 | DEFUN ("set-input-mode", Fset_input_mode, Sset_input_mode, 3, 4, 0, | |
4116 | "Set mode of reading keyboard input.\n\ | |
464f8898 RS |
4117 | First arg INTERRUPT non-nil means use input interrupts;\n\ |
4118 | nil means use CBREAK mode.\n\ | |
4119 | Second arg FLOW non-nil means use ^S/^Q flow control for output to terminal\n\ | |
284f4730 | 4120 | (no effect except in CBREAK mode).\n\ |
464f8898 | 4121 | Third arg META non-nil means accept 8-bit input (for a Meta key).\n\ |
284f4730 | 4122 | Otherwise, the top bit is ignored, on the assumption it is parity.\n\ |
464f8898 | 4123 | Optional fourth arg QUIT if non-nil specifies character to use for quitting.") |
284f4730 JB |
4124 | (interrupt, flow, meta, quit) |
4125 | Lisp_Object interrupt, flow, meta, quit; | |
4126 | { | |
4127 | if (!NILP (quit) | |
4128 | && (XTYPE (quit) != Lisp_Int | |
4129 | || XINT (quit) < 0 || XINT (quit) > 0400)) | |
4130 | error ("set-input-mode: QUIT must be an ASCII character."); | |
4131 | ||
4132 | reset_sys_modes (); | |
4133 | #ifdef SIGIO | |
4134 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
4135 | #ifdef NO_SOCK_SIGIO | |
4136 | if (read_socket_hook) | |
4137 | interrupt_input = 0; /* No interrupts if reading from a socket. */ | |
4138 | else | |
4139 | #endif /* NO_SOCK_SIGIO */ | |
4140 | interrupt_input = !NILP (interrupt); | |
4141 | #else /* not SIGIO */ | |
4142 | interrupt_input = 0; | |
4143 | #endif /* not SIGIO */ | |
4144 | /* Our VMS input only works by interrupts, as of now. */ | |
4145 | #ifdef VMS | |
4146 | interrupt_input = 1; | |
4147 | #endif | |
4148 | flow_control = !NILP (flow); | |
4149 | meta_key = !NILP (meta); | |
4150 | if (!NILP (quit)) | |
4151 | /* Don't let this value be out of range. */ | |
4152 | quit_char = XINT (quit) & (meta_key ? 0377 : 0177); | |
4153 | ||
4154 | init_sys_modes (); | |
4155 | return Qnil; | |
4156 | } | |
4157 | \f | |
4158 | init_keyboard () | |
4159 | { | |
284f4730 JB |
4160 | /* This is correct before outermost invocation of the editor loop */ |
4161 | command_loop_level = -1; | |
4162 | immediate_quit = 0; | |
4163 | quit_char = Ctl ('g'); | |
dbc4e1c1 | 4164 | unread_command_events = Qnil; |
86e5706b | 4165 | unread_command_char = -1; |
284f4730 | 4166 | total_keys = 0; |
9deb415a | 4167 | recent_keys_index = 0; |
284f4730 JB |
4168 | kbd_fetch_ptr = kbd_buffer; |
4169 | kbd_store_ptr = kbd_buffer; | |
4170 | do_mouse_tracking = 0; | |
4171 | input_pending = 0; | |
4172 | ||
07d2b8de | 4173 | #ifdef MULTI_FRAME |
8f805655 JB |
4174 | /* This means that command_loop_1 won't try to select anything the first |
4175 | time through. */ | |
3c370943 JB |
4176 | internal_last_event_frame = Qnil; |
4177 | Vlast_event_frame = internal_last_event_frame; | |
7b4aedb9 JB |
4178 | #endif |
4179 | ||
4180 | /* If we're running a dumped Emacs, we need to clear out | |
4181 | kbd_buffer_frame_or_window, in case some events got into it | |
4182 | before we dumped. | |
4bb994d1 | 4183 | |
7b4aedb9 JB |
4184 | If we're running an undumped Emacs, it hasn't been initialized by |
4185 | syms_of_keyboard yet. */ | |
4bb994d1 | 4186 | if (initialized) |
7b4aedb9 | 4187 | Ffillarray (kbd_buffer_frame_or_window, Qnil); |
07d2b8de | 4188 | |
284f4730 JB |
4189 | if (!noninteractive) |
4190 | { | |
4191 | signal (SIGINT, interrupt_signal); | |
cb5df6ae | 4192 | #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS) |
284f4730 JB |
4193 | /* For systems with SysV TERMIO, C-g is set up for both SIGINT and |
4194 | SIGQUIT and we can't tell which one it will give us. */ | |
4195 | signal (SIGQUIT, interrupt_signal); | |
4196 | #endif /* HAVE_TERMIO */ | |
4197 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
4198 | #ifdef SIGIO | |
4199 | signal (SIGIO, input_available_signal); | |
8ea0a720 | 4200 | #endif /* SIGIO */ |
284f4730 JB |
4201 | } |
4202 | ||
4203 | /* Use interrupt input by default, if it works and noninterrupt input | |
4204 | has deficiencies. */ | |
4205 | ||
4206 | #ifdef INTERRUPT_INPUT | |
4207 | interrupt_input = 1; | |
4208 | #else | |
4209 | interrupt_input = 0; | |
4210 | #endif | |
4211 | ||
4212 | /* Our VMS input only works by interrupts, as of now. */ | |
4213 | #ifdef VMS | |
4214 | interrupt_input = 1; | |
4215 | #endif | |
4216 | ||
4217 | sigfree (); | |
4218 | dribble = 0; | |
4219 | ||
4220 | if (keyboard_init_hook) | |
4221 | (*keyboard_init_hook) (); | |
4222 | ||
4223 | #ifdef POLL_FOR_INPUT | |
4224 | poll_suppress_count = 1; | |
4225 | start_polling (); | |
4226 | #endif | |
4227 | } | |
4228 | ||
4229 | /* This type's only use is in syms_of_keyboard, to initialize the | |
4230 | event header symbols and put properties on them. */ | |
4231 | struct event_head { | |
4232 | Lisp_Object *var; | |
4233 | char *name; | |
4234 | Lisp_Object *kind; | |
4235 | }; | |
4236 | ||
4237 | struct event_head head_table[] = { | |
7b4aedb9 | 4238 | &Qmouse_movement, "mouse-movement", &Qmouse_movement, |
3c370943 | 4239 | &Qscroll_bar_movement, "scroll-bar-movement", &Qmouse_movement, |
7b4aedb9 | 4240 | &Qswitch_frame, "switch-frame", &Qswitch_frame, |
284f4730 JB |
4241 | }; |
4242 | ||
4243 | syms_of_keyboard () | |
4244 | { | |
4245 | Qself_insert_command = intern ("self-insert-command"); | |
4246 | staticpro (&Qself_insert_command); | |
4247 | ||
4248 | Qforward_char = intern ("forward-char"); | |
4249 | staticpro (&Qforward_char); | |
4250 | ||
4251 | Qbackward_char = intern ("backward-char"); | |
4252 | staticpro (&Qbackward_char); | |
4253 | ||
4254 | Qdisabled = intern ("disabled"); | |
4255 | staticpro (&Qdisabled); | |
4256 | ||
86e5706b RS |
4257 | Qpre_command_hook = intern ("pre-command-hook"); |
4258 | staticpro (&Qpre_command_hook); | |
4259 | ||
4260 | Qpost_command_hook = intern ("post-command-hook"); | |
4261 | staticpro (&Qpost_command_hook); | |
4262 | ||
284f4730 JB |
4263 | Qfunction_key = intern ("function-key"); |
4264 | staticpro (&Qfunction_key); | |
13b5e56c | 4265 | Qmouse_click = intern ("mouse-click"); |
284f4730 | 4266 | staticpro (&Qmouse_click); |
284f4730 JB |
4267 | |
4268 | Qmode_line = intern ("mode-line"); | |
4269 | staticpro (&Qmode_line); | |
e5d77022 JB |
4270 | Qvertical_line = intern ("vertical-line"); |
4271 | staticpro (&Qvertical_line); | |
3c370943 JB |
4272 | Qvertical_scroll_bar = intern ("vertical-scroll-bar"); |
4273 | staticpro (&Qvertical_scroll_bar); | |
4bb994d1 JB |
4274 | |
4275 | Qabove_handle = intern ("above-handle"); | |
4276 | staticpro (&Qabove_handle); | |
4277 | Qhandle = intern ("handle"); | |
4278 | staticpro (&Qhandle); | |
4279 | Qbelow_handle = intern ("below-handle"); | |
4280 | staticpro (&Qbelow_handle); | |
284f4730 | 4281 | |
cd21b839 | 4282 | Qevent_kind = intern ("event-kind"); |
284f4730 | 4283 | staticpro (&Qevent_kind); |
88cb0656 JB |
4284 | Qevent_symbol_elements = intern ("event-symbol-elements"); |
4285 | staticpro (&Qevent_symbol_elements); | |
0a7f1fc0 JB |
4286 | Qevent_symbol_element_mask = intern ("event-symbol-element-mask"); |
4287 | staticpro (&Qevent_symbol_element_mask); | |
4288 | Qmodifier_cache = intern ("modifier-cache"); | |
4289 | staticpro (&Qmodifier_cache); | |
284f4730 JB |
4290 | |
4291 | { | |
4292 | struct event_head *p; | |
4293 | ||
4294 | for (p = head_table; | |
4295 | p < head_table + (sizeof (head_table) / sizeof (head_table[0])); | |
4296 | p++) | |
4297 | { | |
4298 | *p->var = intern (p->name); | |
4299 | staticpro (p->var); | |
4300 | Fput (*p->var, Qevent_kind, *p->kind); | |
88cb0656 | 4301 | Fput (*p->var, Qevent_symbol_elements, Fcons (*p->var, Qnil)); |
284f4730 JB |
4302 | } |
4303 | } | |
4304 | ||
7b4aedb9 JB |
4305 | button_down_location = Fmake_vector (make_number (NUM_MOUSE_BUTTONS), Qnil); |
4306 | staticpro (&button_down_location); | |
88cb0656 JB |
4307 | |
4308 | { | |
4309 | int i; | |
4310 | int len = sizeof (modifier_names) / sizeof (modifier_names[0]); | |
4311 | ||
4312 | modifier_symbols = Fmake_vector (make_number (len), Qnil); | |
4313 | for (i = 0; i < len; i++) | |
86e5706b RS |
4314 | if (modifier_names[i]) |
4315 | XVECTOR (modifier_symbols)->contents[i] = intern (modifier_names[i]); | |
88cb0656 JB |
4316 | staticpro (&modifier_symbols); |
4317 | } | |
4318 | ||
9deb415a JB |
4319 | recent_keys = Fmake_vector (make_number (NUM_RECENT_KEYS), Qnil); |
4320 | staticpro (&recent_keys); | |
4321 | ||
6569cc8d | 4322 | this_command_keys = Fmake_vector (make_number (40), Qnil); |
715d9345 | 4323 | staticpro (&this_command_keys); |
6569cc8d | 4324 | |
7b4aedb9 JB |
4325 | kbd_buffer_frame_or_window |
4326 | = Fmake_vector (make_number (KBD_BUFFER_SIZE), Qnil); | |
4327 | staticpro (&kbd_buffer_frame_or_window); | |
4bb994d1 | 4328 | |
284f4730 JB |
4329 | func_key_syms = Qnil; |
4330 | staticpro (&func_key_syms); | |
4331 | ||
4332 | mouse_syms = Qnil; | |
4333 | staticpro (&mouse_syms); | |
4334 | ||
cd21b839 JB |
4335 | unread_switch_frame = Qnil; |
4336 | staticpro (&unread_switch_frame); | |
4337 | ||
284f4730 JB |
4338 | defsubr (&Sread_key_sequence); |
4339 | defsubr (&Srecursive_edit); | |
4340 | defsubr (&Strack_mouse); | |
284f4730 JB |
4341 | defsubr (&Sinput_pending_p); |
4342 | defsubr (&Scommand_execute); | |
4343 | defsubr (&Srecent_keys); | |
4344 | defsubr (&Sthis_command_keys); | |
4345 | defsubr (&Ssuspend_emacs); | |
4346 | defsubr (&Sabort_recursive_edit); | |
4347 | defsubr (&Sexit_recursive_edit); | |
4348 | defsubr (&Srecursion_depth); | |
4349 | defsubr (&Stop_level); | |
4350 | defsubr (&Sdiscard_input); | |
4351 | defsubr (&Sopen_dribble_file); | |
4352 | defsubr (&Sset_input_mode); | |
4353 | defsubr (&Sexecute_extended_command); | |
4354 | ||
4355 | DEFVAR_LISP ("disabled-command-hook", &Vdisabled_command_hook, | |
4356 | "Value is called instead of any command that is disabled\n\ | |
7d6de002 | 4357 | \(has a non-nil `disabled' property)."); |
284f4730 JB |
4358 | |
4359 | DEFVAR_LISP ("last-command-char", &last_command_char, | |
86e5706b RS |
4360 | "Last input event that was part of a command."); |
4361 | ||
4362 | DEFVAR_LISP ("last-command-event", &last_command_char, | |
4363 | "Last input event that was part of a command."); | |
284f4730 | 4364 | |
7d6de002 | 4365 | DEFVAR_LISP ("last-nonmenu-event", &last_nonmenu_event, |
86e5706b | 4366 | "Last input event in a command, except for mouse menu events.\n\ |
7d6de002 RS |
4367 | Mouse menus give back keys that don't look like mouse events;\n\ |
4368 | this variable holds the actual mouse event that led to the menu,\n\ | |
4369 | so that you can determine whether the command was run by mouse or not."); | |
4370 | ||
284f4730 | 4371 | DEFVAR_LISP ("last-input-char", &last_input_char, |
86e5706b RS |
4372 | "Last input event."); |
4373 | ||
4374 | DEFVAR_LISP ("last-input-event", &last_input_char, | |
4375 | "Last input event."); | |
284f4730 | 4376 | |
dbc4e1c1 | 4377 | DEFVAR_LISP ("unread-command-events", &unread_command_events, |
1c07d0a6 | 4378 | "List of objects to be read as next command input events."); |
284f4730 | 4379 | |
86e5706b RS |
4380 | DEFVAR_INT ("unread-command-char", &unread_command_char, |
4381 | "If not -1, an object to be read as next command input event."); | |
4382 | ||
284f4730 JB |
4383 | DEFVAR_LISP ("meta-prefix-char", &meta_prefix_char, |
4384 | "Meta-prefix character code. Meta-foo as command input\n\ | |
4385 | turns into this character followed by foo."); | |
4386 | XSET (meta_prefix_char, Lisp_Int, 033); | |
4387 | ||
4388 | DEFVAR_LISP ("last-command", &last_command, | |
4389 | "The last command executed. Normally a symbol with a function definition,\n\ | |
4390 | but can be whatever was found in the keymap, or whatever the variable\n\ | |
4391 | `this-command' was set to by that command."); | |
4392 | last_command = Qnil; | |
4393 | ||
4394 | DEFVAR_LISP ("this-command", &this_command, | |
4395 | "The command now being executed.\n\ | |
4396 | The command can set this variable; whatever is put here\n\ | |
4397 | will be in `last-command' during the following command."); | |
4398 | this_command = Qnil; | |
4399 | ||
4400 | DEFVAR_INT ("auto-save-interval", &auto_save_interval, | |
4401 | "*Number of keyboard input characters between auto-saves.\n\ | |
4402 | Zero means disable autosaving due to number of characters typed."); | |
4403 | auto_save_interval = 300; | |
4404 | ||
4405 | DEFVAR_LISP ("auto-save-timeout", &Vauto_save_timeout, | |
4406 | "*Number of seconds idle time before auto-save.\n\ | |
06ef7355 RS |
4407 | Zero or nil means disable auto-saving due to idleness.\n\ |
4408 | After auto-saving due to this many seconds of idle time,\n\ | |
84447c71 | 4409 | Emacs also does a garbage collection if that seems to be warranted."); |
284f4730 JB |
4410 | XFASTINT (Vauto_save_timeout) = 30; |
4411 | ||
4412 | DEFVAR_INT ("echo-keystrokes", &echo_keystrokes, | |
4413 | "*Nonzero means echo unfinished commands after this many seconds of pause."); | |
4414 | echo_keystrokes = 1; | |
4415 | ||
4416 | DEFVAR_INT ("polling-period", &polling_period, | |
4417 | "*Interval between polling for input during Lisp execution.\n\ | |
4418 | The reason for polling is to make C-g work to stop a running program.\n\ | |
4419 | Polling is needed only when using X windows and SIGIO does not work.\n\ | |
4420 | Polling is automatically disabled in all other cases."); | |
4421 | polling_period = 2; | |
4422 | ||
4423 | DEFVAR_INT ("num-input-keys", &num_input_keys, | |
4424 | "*Number of complete keys read from the keyboard so far."); | |
4425 | num_input_keys = 0; | |
4426 | ||
07d2b8de | 4427 | #ifdef MULTI_FRAME |
ff11dfa1 | 4428 | DEFVAR_LISP ("last-event-frame", &Vlast_event_frame, |
fce33686 JB |
4429 | "*The frame in which the most recently read event occurred.\n\ |
4430 | If the last event came from a keyboard macro, this is set to `macro'."); | |
ff11dfa1 | 4431 | Vlast_event_frame = Qnil; |
07d2b8de | 4432 | #endif |
284f4730 JB |
4433 | |
4434 | DEFVAR_LISP ("help-char", &help_char, | |
4435 | "Character to recognize as meaning Help.\n\ | |
4436 | When it is read, do `(eval help-form)', and display result if it's a string.\n\ | |
4437 | If the value of `help-form' is nil, this char can be read normally."); | |
4438 | XSET (help_char, Lisp_Int, Ctl ('H')); | |
4439 | ||
4440 | DEFVAR_LISP ("help-form", &Vhelp_form, | |
4441 | "Form to execute when character help-char is read.\n\ | |
4442 | If the form returns a string, that string is displayed.\n\ | |
4443 | If `help-form' is nil, the help char is not recognized."); | |
4444 | Vhelp_form = Qnil; | |
4445 | ||
4446 | DEFVAR_LISP ("top-level", &Vtop_level, | |
4447 | "Form to evaluate when Emacs starts up.\n\ | |
4448 | Useful to set before you dump a modified Emacs."); | |
4449 | Vtop_level = Qnil; | |
4450 | ||
4451 | DEFVAR_LISP ("keyboard-translate-table", &Vkeyboard_translate_table, | |
4452 | "String used as translate table for keyboard input, or nil.\n\ | |
4453 | Each character is looked up in this string and the contents used instead.\n\ | |
4454 | If string is of length N, character codes N and up are untranslated."); | |
4455 | Vkeyboard_translate_table = Qnil; | |
4456 | ||
284f4730 | 4457 | DEFVAR_BOOL ("menu-prompting", &menu_prompting, |
7d6de002 | 4458 | "Non-nil means prompt with menus when appropriate.\n\ |
284f4730 | 4459 | This is done when reading from a keymap that has a prompt string,\n\ |
7d6de002 RS |
4460 | for elements that have prompt strings.\n\ |
4461 | The menu is displayed on the screen\n\ | |
4462 | if X menus were enabled at configuration\n\ | |
4463 | time and the previous event was a mouse click prefix key.\n\ | |
4464 | Otherwise, menu prompting uses the echo area."); | |
284f4730 JB |
4465 | menu_prompting = 1; |
4466 | ||
4467 | DEFVAR_LISP ("menu-prompt-more-char", &menu_prompt_more_char, | |
4468 | "Character to see next line of menu prompt.\n\ | |
4469 | Type this character while in a menu prompt to rotate around the lines of it."); | |
4470 | XSET (menu_prompt_more_char, Lisp_Int, ' '); | |
9fa4395d RS |
4471 | |
4472 | DEFVAR_INT ("extra-keyboard-modifiers", &extra_keyboard_modifiers, | |
4473 | "A mask of additional modifier keys to use with every keyboard character.\n\ | |
4474 | These bits follow the convention for X windows,\n\ | |
4475 | but the control and meta bits work even when you are not using X:\n\ | |
4476 | 1 -- shift bit 2 -- lock bit\n\ | |
4477 | 4 -- control bit 8 -- meta bit."); | |
4478 | extra_keyboard_modifiers = 0; | |
86e5706b RS |
4479 | |
4480 | DEFVAR_LISP ("deactivate-mark", &Vdeactivate_mark, | |
4481 | "If an editing command sets this to t, deactivate the mark afterward.\n\ | |
4482 | The command loop sets this to nil before each command,\n\ | |
4483 | and tests the value when the command returns.\n\ | |
4484 | Buffer modification stores t in this variable."); | |
4485 | Vdeactivate_mark = Qnil; | |
4486 | ||
4487 | DEFVAR_LISP ("pre-command-hook", &Vpre_command_hook, | |
4488 | "Normal hook run before each command is executed."); | |
4489 | Vpre_command_hook = Qnil; | |
4490 | ||
4491 | DEFVAR_LISP ("post-command-hook", &Vpost_command_hook, | |
4492 | "Normal hook run before each command is executed."); | |
4493 | Vpost_command_hook = Qnil; | |
284f4730 JB |
4494 | } |
4495 | ||
4496 | keys_of_keyboard () | |
4497 | { | |
4498 | initial_define_key (global_map, Ctl ('Z'), "suspend-emacs"); | |
4499 | initial_define_key (control_x_map, Ctl ('Z'), "suspend-emacs"); | |
4500 | initial_define_key (meta_map, Ctl ('C'), "exit-recursive-edit"); | |
4501 | initial_define_key (global_map, Ctl (']'), "abort-recursive-edit"); | |
4502 | initial_define_key (meta_map, 'x', "execute-extended-command"); | |
4503 | } |