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 | 37 | #include "keyboard.h" |
497ba7a1 | 38 | #include "intervals.h" |
9ac0d9e0 | 39 | #include "blockinput.h" |
284f4730 JB |
40 | #include <setjmp.h> |
41 | #include <errno.h> | |
42 | ||
284f4730 JB |
43 | #ifndef VMS |
44 | #include <sys/ioctl.h> | |
284f4730 JB |
45 | #endif |
46 | ||
52baf19e | 47 | #include "syssignal.h" |
6ef5b54f | 48 | #include "systty.h" |
ffd56f97 | 49 | #include "systime.h" |
52baf19e JB |
50 | |
51 | extern int errno; | |
52 | ||
9ac0d9e0 JB |
53 | /* Variables for blockinput.h: */ |
54 | ||
55 | /* Non-zero if interrupt input is blocked right now. */ | |
63927c41 | 56 | int interrupt_input_blocked; |
9ac0d9e0 JB |
57 | |
58 | /* Nonzero means an input interrupt has arrived | |
59 | during the current critical section. */ | |
63927c41 | 60 | int interrupt_input_pending; |
9ac0d9e0 JB |
61 | |
62 | ||
284f4730 JB |
63 | #ifdef HAVE_X_WINDOWS |
64 | extern Lisp_Object Vmouse_grabbed; | |
65 | ||
66 | /* Make all keyboard buffers much bigger when using X windows. */ | |
67 | #define KBD_BUFFER_SIZE 4096 | |
68 | #else /* No X-windows, character input */ | |
69 | #define KBD_BUFFER_SIZE 256 | |
70 | #endif /* No X-windows */ | |
71 | ||
72 | /* Following definition copied from eval.c */ | |
73 | ||
74 | struct backtrace | |
75 | { | |
76 | struct backtrace *next; | |
77 | Lisp_Object *function; | |
78 | Lisp_Object *args; /* Points to vector of args. */ | |
79 | int nargs; /* length of vector. If nargs is UNEVALLED, | |
80 | args points to slot holding list of | |
81 | unevalled args */ | |
82 | char evalargs; | |
83 | }; | |
84 | ||
85 | /* Non-nil disable property on a command means | |
86 | do not execute it; call disabled-command-hook's value instead. */ | |
87 | Lisp_Object Qdisabled, Vdisabled_command_hook; | |
88 | ||
89 | #define NUM_RECENT_KEYS (100) | |
90 | int recent_keys_index; /* Index for storing next element into recent_keys */ | |
91 | int total_keys; /* Total number of elements stored into recent_keys */ | |
5160df46 | 92 | Lisp_Object recent_keys; /* A vector, holding the last 100 keystrokes */ |
284f4730 | 93 | |
6569cc8d JB |
94 | /* Vector holding the key sequence that invoked the current command. |
95 | It is reused for each command, and it may be longer than the current | |
96 | sequence; this_command_key_count indicates how many elements | |
97 | actually mean something. | |
98 | It's easier to staticpro a single Lisp_Object than an array. */ | |
99 | Lisp_Object this_command_keys; | |
100 | int this_command_key_count; | |
284f4730 JB |
101 | |
102 | extern int minbuf_level; | |
103 | ||
104 | extern struct backtrace *backtrace_list; | |
105 | ||
106 | /* Nonzero means do menu prompting. */ | |
107 | static int menu_prompting; | |
108 | ||
109 | /* Character to see next line of menu prompt. */ | |
110 | static Lisp_Object menu_prompt_more_char; | |
111 | ||
112 | /* For longjmp to where kbd input is being done. */ | |
113 | static jmp_buf getcjmp; | |
114 | ||
115 | /* True while doing kbd input. */ | |
116 | int waiting_for_input; | |
117 | ||
118 | /* True while displaying for echoing. Delays C-g throwing. */ | |
119 | static int echoing; | |
120 | ||
121 | /* Nonzero means C-G should cause immediate error-signal. */ | |
122 | int immediate_quit; | |
123 | ||
124 | /* Character to recognize as the help char. */ | |
125 | Lisp_Object help_char; | |
126 | ||
127 | /* Form to execute when help char is typed. */ | |
128 | Lisp_Object Vhelp_form; | |
129 | ||
130 | /* Character that causes a quit. Normally C-g. | |
131 | ||
132 | If we are running on an ordinary terminal, this must be an ordinary | |
133 | ASCII char, since we want to make it our interrupt character. | |
134 | ||
135 | If we are not running on an ordinary terminal, it still needs to be | |
136 | an ordinary ASCII char. This character needs to be recognized in | |
137 | the input interrupt handler. At this point, the keystroke is | |
138 | represented as a struct input_event, while the desired quit | |
139 | character is specified as a lispy event. The mapping from struct | |
140 | input_events to lispy events cannot run in an interrupt handler, | |
141 | and the reverse mapping is difficult for anything but ASCII | |
142 | keystrokes. | |
143 | ||
144 | FOR THESE ELABORATE AND UNSATISFYING REASONS, quit_char must be an | |
145 | ASCII character. */ | |
146 | int quit_char; | |
147 | ||
148 | extern Lisp_Object current_global_map; | |
149 | extern int minibuf_level; | |
150 | ||
151 | /* Current depth in recursive edits. */ | |
152 | int command_loop_level; | |
153 | ||
154 | /* Total number of times command_loop has read a key sequence. */ | |
155 | int num_input_keys; | |
156 | ||
157 | /* Last input character read as a command. */ | |
158 | Lisp_Object last_command_char; | |
159 | ||
7d6de002 RS |
160 | /* Last input character read as a command, not counting menus |
161 | reached by the mouse. */ | |
162 | Lisp_Object last_nonmenu_event; | |
163 | ||
284f4730 JB |
164 | /* Last input character read for any purpose. */ |
165 | Lisp_Object last_input_char; | |
166 | ||
dbc4e1c1 JB |
167 | /* If not Qnil, a list of objects to be read as subsequent command input. */ |
168 | Lisp_Object unread_command_events; | |
284f4730 | 169 | |
86e5706b RS |
170 | /* If not -1, an event to be read as subsequent command input. */ |
171 | int unread_command_char; | |
172 | ||
cd21b839 JB |
173 | /* If not Qnil, this is a switch-frame event which we decided to put |
174 | off until the end of a key sequence. This should be read as the | |
dbc4e1c1 | 175 | next command input, after any unread_command_events. |
8f805655 JB |
176 | |
177 | read_key_sequence uses this to delay switch-frame events until the | |
178 | end of the key sequence; Fread_char uses it to put off switch-frame | |
179 | events until a non-ASCII event is acceptable as input. */ | |
180 | Lisp_Object unread_switch_frame; | |
cd21b839 | 181 | |
9fa4395d RS |
182 | /* A mask of extra modifier bits to put into every keyboard char. */ |
183 | int extra_keyboard_modifiers; | |
184 | ||
284f4730 JB |
185 | /* Char to use as prefix when a meta character is typed in. |
186 | This is bound on entry to minibuffer in case ESC is changed there. */ | |
187 | ||
188 | Lisp_Object meta_prefix_char; | |
189 | ||
190 | /* Last size recorded for a current buffer which is not a minibuffer. */ | |
191 | static int last_non_minibuf_size; | |
192 | ||
06ef7355 | 193 | /* Number of idle seconds before an auto-save and garbage collection. */ |
284f4730 JB |
194 | static Lisp_Object Vauto_save_timeout; |
195 | ||
196 | /* Total number of times read_char has returned. */ | |
197 | int num_input_chars; | |
198 | ||
51172b6d RS |
199 | /* Total number of times read_char has returned, outside of macros. */ |
200 | int num_nonmacro_input_chars; | |
201 | ||
284f4730 JB |
202 | /* Auto-save automatically when this many characters have been typed |
203 | since the last time. */ | |
204 | ||
205 | static int auto_save_interval; | |
206 | ||
51172b6d | 207 | /* Value of num_nonmacro_input_chars as of last auto save. */ |
284f4730 JB |
208 | |
209 | int last_auto_save; | |
210 | ||
211 | /* Last command executed by the editor command loop, not counting | |
212 | commands that set the prefix argument. */ | |
213 | ||
214 | Lisp_Object last_command; | |
215 | ||
216 | /* The command being executed by the command loop. | |
217 | Commands may set this, and the value set will be copied into last_command | |
218 | instead of the actual command. */ | |
219 | Lisp_Object this_command; | |
220 | ||
07d2b8de | 221 | #ifdef MULTI_FRAME |
fce33686 | 222 | /* The frame in which the last input event occurred, or Qmacro if the |
3c370943 JB |
223 | last event came from a macro. We use this to determine when to |
224 | generate switch-frame events. This may be cleared by functions | |
225 | like Fselect_frame, to make sure that a switch-frame event is | |
226 | generated by the next character. */ | |
227 | Lisp_Object internal_last_event_frame; | |
228 | ||
229 | /* A user-visible version of the above, intended to allow users to | |
230 | figure out where the last event came from, if the event doesn't | |
231 | carry that information itself (i.e. if it was a character). */ | |
ff11dfa1 | 232 | Lisp_Object Vlast_event_frame; |
07d2b8de | 233 | #endif |
284f4730 | 234 | |
1113d9db JB |
235 | /* The timestamp of the last input event we received from the X server. |
236 | X Windows wants this for selection ownership. */ | |
284f4730 JB |
237 | unsigned long last_event_timestamp; |
238 | ||
239 | Lisp_Object Qself_insert_command; | |
240 | Lisp_Object Qforward_char; | |
241 | Lisp_Object Qbackward_char; | |
242 | ||
243 | /* read_key_sequence stores here the command definition of the | |
244 | key sequence that it reads. */ | |
245 | Lisp_Object read_key_sequence_cmd; | |
246 | ||
247 | /* Form to evaluate (if non-nil) when Emacs is started. */ | |
248 | Lisp_Object Vtop_level; | |
249 | ||
250 | /* User-supplied string to translate input characters through. */ | |
251 | Lisp_Object Vkeyboard_translate_table; | |
252 | ||
253 | /* Keymap mapping ASCII function key sequences onto their preferred forms. */ | |
254 | extern Lisp_Object Vfunction_key_map; | |
255 | ||
86e5706b RS |
256 | /* Non-nil means deactivate the mark at end of this command. */ |
257 | Lisp_Object Vdeactivate_mark; | |
258 | ||
48e416d4 RS |
259 | /* Menu bar specified in Lucid Emacs fashion. */ |
260 | ||
261 | Lisp_Object Vlucid_menu_bar_dirty_flag; | |
262 | Lisp_Object Qrecompute_lucid_menubar, Qactivate_menubar_hook; | |
263 | ||
86e5706b RS |
264 | /* Hooks to run before and after each command. */ |
265 | Lisp_Object Qpre_command_hook, Qpost_command_hook; | |
266 | Lisp_Object Vpre_command_hook, Vpost_command_hook; | |
267 | ||
284f4730 JB |
268 | /* File in which we write all commands we read. */ |
269 | FILE *dribble; | |
270 | ||
271 | /* Nonzero if input is available. */ | |
272 | int input_pending; | |
273 | ||
b04904fb RS |
274 | /* 1 if should obey 0200 bit in input chars as "Meta", 2 if should |
275 | keep 0200 bit in input chars. 0 to ignore the 0200 bit. */ | |
276 | ||
284f4730 JB |
277 | int meta_key; |
278 | ||
279 | extern char *pending_malloc_warning; | |
280 | ||
281 | /* Circular buffer for pre-read keyboard input. */ | |
282 | static struct input_event kbd_buffer[KBD_BUFFER_SIZE]; | |
283 | ||
7b4aedb9 | 284 | /* Vector to GCPRO the frames and windows mentioned in kbd_buffer. |
4bb994d1 | 285 | |
7b4aedb9 JB |
286 | The interrupt-level event handlers will never enqueue an event on a |
287 | frame which is not in Vframe_list, and once an event is dequeued, | |
3c370943 JB |
288 | internal_last_event_frame or the event itself points to the frame. |
289 | So that's all fine. | |
4bb994d1 JB |
290 | |
291 | But while the event is sitting in the queue, it's completely | |
292 | unprotected. Suppose the user types one command which will run for | |
293 | a while and then delete a frame, and then types another event at | |
294 | the frame that will be deleted, before the command gets around to | |
295 | it. Suppose there are no references to this frame elsewhere in | |
296 | Emacs, and a GC occurs before the second event is dequeued. Now we | |
297 | have an event referring to a freed frame, which will crash Emacs | |
298 | when it is dequeued. | |
299 | ||
3c370943 | 300 | Similar things happen when an event on a scroll bar is enqueued; the |
7b4aedb9 | 301 | window may be deleted while the event is in the queue. |
4bb994d1 | 302 | |
7b4aedb9 JB |
303 | So, we use this vector to protect the frame_or_window field in the |
304 | event queue. That way, they'll be dequeued as dead frames or | |
305 | windows, but still valid lisp objects. | |
306 | ||
307 | If kbd_buffer[i].kind != no_event, then | |
308 | (XVECTOR (kbd_buffer_frame_or_window)->contents[i] | |
309 | == kbd_buffer[i].frame_or_window. */ | |
310 | static Lisp_Object kbd_buffer_frame_or_window; | |
4bb994d1 | 311 | |
284f4730 JB |
312 | /* Pointer to next available character in kbd_buffer. |
313 | If kbd_fetch_ptr == kbd_store_ptr, the buffer is empty. | |
314 | This may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the the | |
315 | next available char is in kbd_buffer[0]. */ | |
316 | static struct input_event *kbd_fetch_ptr; | |
317 | ||
318 | /* Pointer to next place to store character in kbd_buffer. This | |
319 | may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the next | |
320 | character should go in kbd_buffer[0]. */ | |
ff0b5f4c JB |
321 | #ifdef __STDC__ |
322 | volatile | |
323 | #endif | |
284f4730 JB |
324 | static struct input_event *kbd_store_ptr; |
325 | ||
326 | /* The above pair of variables forms a "queue empty" flag. When we | |
327 | enqueue a non-hook event, we increment kbd_write_count. When we | |
328 | dequeue a non-hook event, we increment kbd_read_count. We say that | |
4bb994d1 | 329 | there is input available iff the two counters are not equal. |
284f4730 JB |
330 | |
331 | Why not just have a flag set and cleared by the enqueuing and | |
332 | dequeuing functions? Such a flag could be screwed up by interrupts | |
333 | at inopportune times. */ | |
334 | ||
663258f2 | 335 | /* If this flag is non-zero, we check mouse_moved to see when the |
4bb994d1 | 336 | mouse moves, and motion events will appear in the input stream. If |
663258f2 JB |
337 | it is zero, mouse motion is ignored. */ |
338 | static int do_mouse_tracking; | |
284f4730 JB |
339 | |
340 | /* The window system handling code should set this if the mouse has | |
341 | moved since the last call to the mouse_position_hook. Calling that | |
342 | hook should clear this. Code assumes that if this is set, it can | |
343 | call mouse_position_hook to get the promised position, so don't set | |
344 | it unless you're prepared to substantiate the claim! */ | |
345 | int mouse_moved; | |
346 | ||
347 | /* True iff there is an event in kbd_buffer, or if mouse tracking is | |
348 | enabled and there is a new mouse position in the mouse movement | |
349 | buffer. Note that if this is false, that doesn't mean that there | |
350 | is readable input; all the events in the queue might be button-up | |
351 | events, and do_mouse_tracking might be off. */ | |
352 | #define EVENT_QUEUES_EMPTY \ | |
353 | ((kbd_fetch_ptr == kbd_store_ptr) && (!do_mouse_tracking || !mouse_moved)) | |
354 | ||
355 | ||
356 | /* Symbols to head events. */ | |
357 | Lisp_Object Qmouse_movement; | |
3c370943 | 358 | Lisp_Object Qscroll_bar_movement; |
cd21b839 JB |
359 | Lisp_Object Qswitch_frame; |
360 | ||
284f4730 JB |
361 | /* Symbols to denote kinds of events. */ |
362 | Lisp_Object Qfunction_key; | |
363 | Lisp_Object Qmouse_click; | |
364 | /* Lisp_Object Qmouse_movement; - also an event header */ | |
284f4730 JB |
365 | |
366 | /* Properties of event headers. */ | |
367 | Lisp_Object Qevent_kind; | |
88cb0656 | 368 | Lisp_Object Qevent_symbol_elements; |
284f4730 | 369 | |
598a9fa7 JB |
370 | Lisp_Object Qmenu_enable; |
371 | ||
0a7f1fc0 JB |
372 | /* An event header symbol HEAD may have a property named |
373 | Qevent_symbol_element_mask, which is of the form (BASE MODIFIERS); | |
374 | BASE is the base, unmodified version of HEAD, and MODIFIERS is the | |
375 | mask of modifiers applied to it. If present, this is used to help | |
376 | speed up parse_modifiers. */ | |
377 | Lisp_Object Qevent_symbol_element_mask; | |
378 | ||
379 | /* An unmodified event header BASE may have a property named | |
380 | Qmodifier_cache, which is an alist mapping modifier masks onto | |
381 | modified versions of BASE. If present, this helps speed up | |
382 | apply_modifiers. */ | |
383 | Lisp_Object Qmodifier_cache; | |
384 | ||
5ec75a55 | 385 | /* Symbols to use for parts of windows. */ |
284f4730 | 386 | Lisp_Object Qmode_line; |
e5d77022 | 387 | Lisp_Object Qvertical_line; |
3c370943 | 388 | Lisp_Object Qvertical_scroll_bar; |
5ec75a55 RS |
389 | Lisp_Object Qmenu_bar; |
390 | ||
391 | extern Lisp_Object Qmenu_enable; | |
284f4730 | 392 | |
f4255cd1 JB |
393 | Lisp_Object recursive_edit_unwind (), command_loop (); |
394 | Lisp_Object Fthis_command_keys (); | |
284f4730 | 395 | |
ffd56f97 JB |
396 | /* Address (if not 0) of EMACS_TIME to zero out if a SIGIO interrupt |
397 | happens. */ | |
398 | EMACS_TIME *input_available_clear_time; | |
284f4730 JB |
399 | |
400 | /* Nonzero means use SIGIO interrupts; zero means use CBREAK mode. | |
401 | Default is 1 if INTERRUPT_INPUT is defined. */ | |
402 | int interrupt_input; | |
403 | ||
404 | /* Nonzero while interrupts are temporarily deferred during redisplay. */ | |
405 | int interrupts_deferred; | |
406 | ||
407 | /* nonzero means use ^S/^Q for flow control. */ | |
408 | int flow_control; | |
409 | ||
284f4730 JB |
410 | /* Allow m- file to inhibit use of FIONREAD. */ |
411 | #ifdef BROKEN_FIONREAD | |
412 | #undef FIONREAD | |
413 | #endif | |
414 | ||
415 | /* We are unable to use interrupts if FIONREAD is not available, | |
416 | so flush SIGIO so we won't try. */ | |
417 | #ifndef FIONREAD | |
418 | #ifdef SIGIO | |
419 | #undef SIGIO | |
420 | #endif | |
421 | #endif | |
422 | ||
423 | /* If we support X Windows, and won't get an interrupt when input | |
424 | arrives from the server, poll periodically so we can detect C-g. */ | |
425 | #ifdef HAVE_X_WINDOWS | |
426 | #ifndef SIGIO | |
427 | #define POLL_FOR_INPUT | |
428 | #endif | |
429 | #endif | |
430 | \f | |
431 | /* Global variable declarations. */ | |
432 | ||
433 | /* Function for init_keyboard to call with no args (if nonzero). */ | |
434 | void (*keyboard_init_hook) (); | |
435 | ||
436 | static int read_avail_input (); | |
437 | static void get_input_pending (); | |
7617111f | 438 | static Lisp_Object read_char_menu_prompt (); |
284f4730 JB |
439 | |
440 | /* > 0 if we are to echo keystrokes. */ | |
441 | static int echo_keystrokes; | |
442 | ||
443 | /* Nonzero means echo each character as typed. */ | |
444 | static int immediate_echo; | |
445 | ||
446 | /* The text we're echoing in the modeline - partial key sequences, | |
f4255cd1 JB |
447 | usually. '\0'-terminated. This really shouldn't have a fixed size. */ |
448 | static char echobuf[300]; | |
284f4730 JB |
449 | |
450 | /* Where to append more text to echobuf if we want to. */ | |
451 | static char *echoptr; | |
452 | ||
453 | #define min(a,b) ((a)<(b)?(a):(b)) | |
454 | #define max(a,b) ((a)>(b)?(a):(b)) | |
455 | ||
456 | /* Install the string STR as the beginning of the string of echoing, | |
457 | so that it serves as a prompt for the next character. | |
458 | Also start echoing. */ | |
459 | ||
460 | echo_prompt (str) | |
461 | char *str; | |
462 | { | |
463 | int len = strlen (str); | |
464 | if (len > sizeof echobuf - 4) | |
465 | len = sizeof echobuf - 4; | |
0a7f1fc0 | 466 | bcopy (str, echobuf, len); |
284f4730 | 467 | echoptr = echobuf + len; |
0a7f1fc0 | 468 | *echoptr = '\0'; |
284f4730 JB |
469 | |
470 | echo (); | |
471 | } | |
472 | ||
473 | /* Add C to the echo string, if echoing is going on. | |
474 | C can be a character, which is printed prettily ("M-C-x" and all that | |
475 | jazz), or a symbol, whose name is printed. */ | |
476 | ||
477 | echo_char (c) | |
478 | Lisp_Object c; | |
479 | { | |
480 | extern char *push_key_description (); | |
481 | ||
482 | if (immediate_echo) | |
483 | { | |
484 | char *ptr = echoptr; | |
485 | ||
486 | if (ptr != echobuf) | |
487 | *ptr++ = ' '; | |
488 | ||
489 | /* If someone has passed us a composite event, use its head symbol. */ | |
88cb0656 | 490 | c = EVENT_HEAD (c); |
284f4730 JB |
491 | |
492 | if (XTYPE (c) == Lisp_Int) | |
493 | { | |
494 | if (ptr - echobuf > sizeof echobuf - 6) | |
495 | return; | |
496 | ||
cb5df6ae | 497 | ptr = push_key_description (XINT (c), ptr); |
284f4730 JB |
498 | } |
499 | else if (XTYPE (c) == Lisp_Symbol) | |
500 | { | |
501 | struct Lisp_String *name = XSYMBOL (c)->name; | |
502 | if (((ptr - echobuf) + name->size + 4) > sizeof echobuf) | |
503 | return; | |
504 | bcopy (name->data, ptr, name->size); | |
505 | ptr += name->size; | |
506 | } | |
507 | ||
f4255cd1 | 508 | if (echoptr == echobuf && EQ (c, help_char)) |
284f4730 JB |
509 | { |
510 | strcpy (ptr, " (Type ? for further options)"); | |
511 | ptr += strlen (ptr); | |
512 | } | |
513 | ||
514 | *ptr = 0; | |
515 | echoptr = ptr; | |
516 | ||
517 | echo (); | |
518 | } | |
519 | } | |
520 | ||
521 | /* Temporarily add a dash to the end of the echo string if it's not | |
522 | empty, so that it serves as a mini-prompt for the very next character. */ | |
523 | ||
524 | echo_dash () | |
525 | { | |
526 | if (!immediate_echo && echoptr == echobuf) | |
527 | return; | |
4bafa972 JB |
528 | /* Do nothing if not echoing at all. */ |
529 | if (echoptr == 0) | |
530 | return; | |
284f4730 JB |
531 | |
532 | /* Put a dash at the end of the buffer temporarily, | |
533 | but make it go away when the next character is added. */ | |
534 | echoptr[0] = '-'; | |
535 | echoptr[1] = 0; | |
536 | ||
537 | echo (); | |
538 | } | |
539 | ||
540 | /* Display the current echo string, and begin echoing if not already | |
541 | doing so. */ | |
542 | ||
543 | echo () | |
544 | { | |
545 | if (!immediate_echo) | |
546 | { | |
547 | int i; | |
548 | immediate_echo = 1; | |
549 | ||
550 | for (i = 0; i < this_command_key_count; i++) | |
6569cc8d | 551 | echo_char (XVECTOR (this_command_keys)->contents[i]); |
284f4730 JB |
552 | echo_dash (); |
553 | } | |
554 | ||
555 | echoing = 1; | |
556 | message1 (echobuf); | |
557 | echoing = 0; | |
558 | ||
559 | if (waiting_for_input && !NILP (Vquit_flag)) | |
560 | quit_throw_to_read_char (); | |
561 | } | |
562 | ||
563 | /* Turn off echoing, for the start of a new command. */ | |
564 | ||
565 | cancel_echoing () | |
566 | { | |
567 | immediate_echo = 0; | |
568 | echoptr = echobuf; | |
569 | } | |
570 | ||
571 | /* Return the length of the current echo string. */ | |
572 | ||
573 | static int | |
574 | echo_length () | |
575 | { | |
576 | return echoptr - echobuf; | |
577 | } | |
578 | ||
579 | /* Truncate the current echo message to its first LEN chars. | |
580 | This and echo_char get used by read_key_sequence when the user | |
ff11dfa1 | 581 | switches frames while entering a key sequence. */ |
284f4730 JB |
582 | |
583 | static void | |
584 | echo_truncate (len) | |
585 | int len; | |
586 | { | |
587 | echobuf[len] = '\0'; | |
0a7f1fc0 | 588 | echoptr = echobuf + len; |
284f4730 JB |
589 | } |
590 | ||
591 | \f | |
592 | /* Functions for manipulating this_command_keys. */ | |
593 | static void | |
594 | add_command_key (key) | |
595 | Lisp_Object key; | |
596 | { | |
6569cc8d JB |
597 | int size = XVECTOR (this_command_keys)->size; |
598 | ||
599 | if (this_command_key_count >= size) | |
284f4730 | 600 | { |
6569cc8d JB |
601 | Lisp_Object new_keys = Fmake_vector (make_number (size * 2), Qnil); |
602 | ||
603 | bcopy (XVECTOR (this_command_keys)->contents, | |
604 | XVECTOR (new_keys)->contents, | |
8f805655 | 605 | size * sizeof (Lisp_Object)); |
6569cc8d JB |
606 | |
607 | this_command_keys = new_keys; | |
284f4730 | 608 | } |
6569cc8d JB |
609 | |
610 | XVECTOR (this_command_keys)->contents[this_command_key_count++] = key; | |
284f4730 JB |
611 | } |
612 | \f | |
613 | Lisp_Object | |
614 | recursive_edit_1 () | |
615 | { | |
616 | int count = specpdl_ptr - specpdl; | |
617 | Lisp_Object val; | |
618 | ||
619 | if (command_loop_level > 0) | |
620 | { | |
621 | specbind (Qstandard_output, Qt); | |
622 | specbind (Qstandard_input, Qt); | |
623 | } | |
624 | ||
625 | val = command_loop (); | |
626 | if (EQ (val, Qt)) | |
627 | Fsignal (Qquit, Qnil); | |
628 | ||
cb5df6ae | 629 | return unbind_to (count, Qnil); |
284f4730 JB |
630 | } |
631 | ||
632 | /* When an auto-save happens, record the "time", and don't do again soon. */ | |
633 | record_auto_save () | |
634 | { | |
51172b6d | 635 | last_auto_save = num_nonmacro_input_chars; |
284f4730 JB |
636 | } |
637 | \f | |
284f4730 JB |
638 | DEFUN ("recursive-edit", Frecursive_edit, Srecursive_edit, 0, 0, "", |
639 | "Invoke the editor command loop recursively.\n\ | |
640 | To get out of the recursive edit, a command can do `(throw 'exit nil)';\n\ | |
641 | that tells this function to return.\n\ | |
642 | Alternately, `(throw 'exit t)' makes this function signal an error.\n\ | |
643 | This function is called by the editor initialization to begin editing.") | |
644 | () | |
645 | { | |
646 | int count = specpdl_ptr - specpdl; | |
647 | Lisp_Object val; | |
648 | ||
649 | command_loop_level++; | |
650 | update_mode_lines = 1; | |
651 | ||
652 | record_unwind_protect (recursive_edit_unwind, | |
653 | (command_loop_level | |
654 | && current_buffer != XBUFFER (XWINDOW (selected_window)->buffer)) | |
655 | ? Fcurrent_buffer () | |
656 | : Qnil); | |
657 | recursive_edit_1 (); | |
658 | return unbind_to (count, Qnil); | |
659 | } | |
660 | ||
661 | Lisp_Object | |
662 | recursive_edit_unwind (buffer) | |
663 | Lisp_Object buffer; | |
664 | { | |
665 | if (!NILP (buffer)) | |
666 | Fset_buffer (buffer); | |
667 | ||
668 | command_loop_level--; | |
669 | update_mode_lines = 1; | |
670 | return Qnil; | |
671 | } | |
672 | \f | |
673 | Lisp_Object | |
674 | cmd_error (data) | |
675 | Lisp_Object data; | |
676 | { | |
677 | Lisp_Object errmsg, tail, errname, file_error; | |
678 | Lisp_Object stream; | |
679 | struct gcpro gcpro1; | |
680 | int i; | |
681 | ||
682 | Vquit_flag = Qnil; | |
683 | Vinhibit_quit = Qt; | |
684 | Vstandard_output = Qt; | |
685 | Vstandard_input = Qt; | |
686 | Vexecuting_macro = Qnil; | |
687 | echo_area_glyphs = 0; | |
688 | ||
ff11dfa1 | 689 | /* If the window system or terminal frame hasn't been initialized |
284f4730 JB |
690 | yet, or we're not interactive, it's best to dump this message out |
691 | to stderr and exit. */ | |
ff11dfa1 | 692 | if (! FRAME_MESSAGE_BUF (selected_frame) |
284f4730 JB |
693 | || noninteractive) |
694 | stream = Qexternal_debugging_output; | |
695 | else | |
696 | { | |
697 | Fdiscard_input (); | |
698 | bitch_at_user (); | |
699 | stream = Qt; | |
700 | } | |
701 | ||
702 | errname = Fcar (data); | |
703 | ||
704 | if (EQ (errname, Qerror)) | |
705 | { | |
706 | data = Fcdr (data); | |
707 | if (!CONSP (data)) data = Qnil; | |
708 | errmsg = Fcar (data); | |
709 | file_error = Qnil; | |
710 | } | |
711 | else | |
712 | { | |
713 | errmsg = Fget (errname, Qerror_message); | |
714 | file_error = Fmemq (Qfile_error, | |
715 | Fget (errname, Qerror_conditions)); | |
716 | } | |
717 | ||
718 | /* Print an error message including the data items. | |
719 | This is done by printing it into a scratch buffer | |
720 | and then making a copy of the text in the buffer. */ | |
721 | ||
722 | if (!CONSP (data)) data = Qnil; | |
723 | tail = Fcdr (data); | |
724 | GCPRO1 (tail); | |
725 | ||
726 | /* For file-error, make error message by concatenating | |
727 | all the data items. They are all strings. */ | |
728 | if (!NILP (file_error) && !NILP (tail)) | |
729 | errmsg = XCONS (tail)->car, tail = XCONS (tail)->cdr; | |
730 | ||
731 | if (XTYPE (errmsg) == Lisp_String) | |
732 | Fprinc (errmsg, stream); | |
733 | else | |
734 | write_string_1 ("peculiar error", -1, stream); | |
735 | ||
736 | for (i = 0; CONSP (tail); tail = Fcdr (tail), i++) | |
737 | { | |
738 | write_string_1 (i ? ", " : ": ", 2, stream); | |
739 | if (!NILP (file_error)) | |
740 | Fprinc (Fcar (tail), stream); | |
741 | else | |
742 | Fprin1 (Fcar (tail), stream); | |
743 | } | |
744 | UNGCPRO; | |
745 | ||
ff11dfa1 | 746 | /* If the window system or terminal frame hasn't been initialized |
284f4730 | 747 | yet, or we're in -batch mode, this error should cause Emacs to exit. */ |
ff11dfa1 | 748 | if (! FRAME_MESSAGE_BUF (selected_frame) |
284f4730 JB |
749 | || noninteractive) |
750 | { | |
751 | Fterpri (stream); | |
752 | Fkill_emacs (make_number (-1)); | |
753 | } | |
754 | ||
755 | Vquit_flag = Qnil; | |
756 | ||
757 | Vinhibit_quit = Qnil; | |
758 | return make_number (0); | |
759 | } | |
760 | \f | |
761 | Lisp_Object command_loop_1 (); | |
762 | Lisp_Object command_loop_2 (); | |
763 | Lisp_Object top_level_1 (); | |
764 | ||
765 | /* Entry to editor-command-loop. | |
766 | This level has the catches for exiting/returning to editor command loop. | |
767 | It returns nil to exit recursive edit, t to abort it. */ | |
768 | ||
769 | Lisp_Object | |
770 | command_loop () | |
771 | { | |
772 | if (command_loop_level > 0 || minibuf_level > 0) | |
773 | { | |
774 | return internal_catch (Qexit, command_loop_2, Qnil); | |
775 | } | |
776 | else | |
777 | while (1) | |
778 | { | |
779 | internal_catch (Qtop_level, top_level_1, Qnil); | |
780 | internal_catch (Qtop_level, command_loop_2, Qnil); | |
781 | ||
782 | /* End of file in -batch run causes exit here. */ | |
783 | if (noninteractive) | |
784 | Fkill_emacs (Qt); | |
785 | } | |
786 | } | |
787 | ||
788 | /* Here we catch errors in execution of commands within the | |
789 | editing loop, and reenter the editing loop. | |
790 | When there is an error, cmd_error runs and returns a non-nil | |
791 | value to us. A value of nil means that cmd_loop_1 itself | |
792 | returned due to end of file (or end of kbd macro). */ | |
793 | ||
794 | Lisp_Object | |
795 | command_loop_2 () | |
796 | { | |
797 | register Lisp_Object val; | |
798 | ||
799 | do | |
800 | val = internal_condition_case (command_loop_1, Qerror, cmd_error); | |
801 | while (!NILP (val)); | |
802 | ||
803 | return Qnil; | |
804 | } | |
805 | ||
806 | Lisp_Object | |
807 | top_level_2 () | |
808 | { | |
809 | return Feval (Vtop_level); | |
810 | } | |
811 | ||
812 | Lisp_Object | |
813 | top_level_1 () | |
814 | { | |
815 | /* On entry to the outer level, run the startup file */ | |
816 | if (!NILP (Vtop_level)) | |
817 | internal_condition_case (top_level_2, Qerror, cmd_error); | |
818 | else if (!NILP (Vpurify_flag)) | |
819 | message ("Bare impure Emacs (standard Lisp code not loaded)"); | |
820 | else | |
821 | message ("Bare Emacs (standard Lisp code not loaded)"); | |
822 | return Qnil; | |
823 | } | |
824 | ||
825 | DEFUN ("top-level", Ftop_level, Stop_level, 0, 0, "", | |
826 | "Exit all recursive editing levels.") | |
827 | () | |
828 | { | |
829 | Fthrow (Qtop_level, Qnil); | |
830 | } | |
831 | ||
832 | DEFUN ("exit-recursive-edit", Fexit_recursive_edit, Sexit_recursive_edit, 0, 0, "", | |
833 | "Exit from the innermost recursive edit or minibuffer.") | |
834 | () | |
835 | { | |
836 | if (command_loop_level > 0 || minibuf_level > 0) | |
837 | Fthrow (Qexit, Qnil); | |
838 | ||
839 | error ("No recursive edit is in progress"); | |
840 | } | |
841 | ||
842 | DEFUN ("abort-recursive-edit", Fabort_recursive_edit, Sabort_recursive_edit, 0, 0, "", | |
843 | "Abort the command that requested this recursive edit or minibuffer input.") | |
844 | () | |
845 | { | |
846 | if (command_loop_level > 0 || minibuf_level > 0) | |
847 | Fthrow (Qexit, Qt); | |
848 | ||
849 | error ("No recursive edit is in progress"); | |
850 | } | |
851 | \f | |
852 | /* This is the actual command reading loop, | |
853 | sans error-handling encapsulation. */ | |
854 | ||
855 | Lisp_Object Fcommand_execute (); | |
856 | static int read_key_sequence (); | |
857 | ||
858 | Lisp_Object | |
859 | command_loop_1 () | |
860 | { | |
48e416d4 | 861 | Lisp_Object cmd, tem; |
284f4730 JB |
862 | int lose; |
863 | int nonundocount; | |
864 | Lisp_Object keybuf[30]; | |
865 | int i; | |
866 | int no_redisplay; | |
867 | int no_direct; | |
86e5706b RS |
868 | int prev_modiff; |
869 | struct buffer *prev_buffer; | |
284f4730 JB |
870 | |
871 | Vprefix_arg = Qnil; | |
86e5706b | 872 | Vdeactivate_mark = Qnil; |
284f4730 JB |
873 | waiting_for_input = 0; |
874 | cancel_echoing (); | |
875 | ||
876 | /* Don't clear out last_command at the beginning of a macro. */ | |
877 | if (XTYPE (Vexecuting_macro) != Lisp_String) | |
878 | last_command = Qt; | |
879 | ||
880 | nonundocount = 0; | |
881 | no_redisplay = 0; | |
882 | this_command_key_count = 0; | |
883 | ||
884 | while (1) | |
885 | { | |
886 | /* Install chars successfully executed in kbd macro. */ | |
887 | ||
888 | if (defining_kbd_macro && NILP (Vprefix_arg)) | |
889 | finalize_kbd_macro_chars (); | |
890 | ||
891 | /* Make sure the current window's buffer is selected. */ | |
892 | if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) | |
893 | set_buffer_internal (XBUFFER (XWINDOW (selected_window)->buffer)); | |
894 | ||
895 | /* Display any malloc warning that just came out. Use while because | |
896 | displaying one warning can cause another. */ | |
897 | ||
898 | while (pending_malloc_warning) | |
899 | display_malloc_warning (); | |
900 | ||
901 | no_direct = 0; | |
902 | ||
86e5706b RS |
903 | Vdeactivate_mark = Qnil; |
904 | ||
284f4730 | 905 | /* If minibuffer on and echo area in use, |
eb8c3be9 | 906 | wait 2 sec and redraw minibuffer. */ |
284f4730 JB |
907 | |
908 | if (minibuf_level && echo_area_glyphs) | |
909 | { | |
f1bed6d8 RS |
910 | /* Bind inhibit-quit to t so that C-g gets read in |
911 | rather than quitting back to the minibuffer. */ | |
912 | int count = specpdl_ptr - specpdl; | |
913 | specbind (Qinhibit_quit, Qt); | |
284f4730 | 914 | Fsit_for (make_number (2), Qnil, Qnil); |
cb5df6ae | 915 | unbind_to (count, Qnil); |
f1bed6d8 | 916 | |
284f4730 JB |
917 | echo_area_glyphs = 0; |
918 | no_direct = 1; | |
919 | if (!NILP (Vquit_flag)) | |
920 | { | |
921 | Vquit_flag = Qnil; | |
dbc4e1c1 | 922 | unread_command_events = Fcons (make_number (quit_char), Qnil); |
284f4730 JB |
923 | } |
924 | } | |
925 | ||
926 | #ifdef C_ALLOCA | |
927 | alloca (0); /* Cause a garbage collection now */ | |
928 | /* Since we can free the most stuff here. */ | |
929 | #endif /* C_ALLOCA */ | |
930 | ||
8f805655 | 931 | #if 0 |
ff11dfa1 | 932 | #ifdef MULTI_FRAME |
8f805655 JB |
933 | /* Select the frame that the last event came from. Usually, |
934 | switch-frame events will take care of this, but if some lisp | |
935 | code swallows a switch-frame event, we'll fix things up here. | |
936 | Is this a good idea? */ | |
3c370943 JB |
937 | if (XTYPE (internal_last_event_frame) == Lisp_Frame |
938 | && XFRAME (internal_last_event_frame) != selected_frame) | |
939 | Fselect_frame (internal_last_event_frame, Qnil); | |
cd21b839 | 940 | #endif |
284f4730 | 941 | #endif |
48e416d4 RS |
942 | /* If it has changed current-menubar from previous value, |
943 | really recompute the menubar from the value. */ | |
944 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
945 | call0 (Qrecompute_lucid_menubar); | |
946 | ||
0e9d6dd3 | 947 | #if 0 /* This is done in xdisp.c now. */ |
48e416d4 RS |
948 | #ifdef MULTI_FRAME |
949 | for (tem = Vframe_list; CONSP (tem); tem = XCONS (tem)->cdr) | |
950 | { | |
951 | struct frame *f = XFRAME (XCONS (tem)->car); | |
952 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
598a9fa7 JB |
953 | |
954 | /* If the user has switched buffers or windows, we need to | |
955 | recompute to reflect the new bindings. But we'll | |
956 | recompute when update_mode_lines is set too; that means | |
957 | that people can use force-mode-line-update to request | |
958 | that the menu bar be recomputed. The adverse effect on | |
959 | the rest of the redisplay algorithm is about the same as | |
960 | windows_or_buffers_changed anyway. */ | |
48e416d4 | 961 | if (windows_or_buffers_changed |
598a9fa7 | 962 | || update_mode_lines |
48e416d4 RS |
963 | || (XFASTINT (w->last_modified) < MODIFF |
964 | && (XFASTINT (w->last_modified) | |
965 | <= XBUFFER (w->buffer)->save_modified))) | |
966 | { | |
967 | struct buffer *prev = current_buffer; | |
968 | current_buffer = XBUFFER (w->buffer); | |
969 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (); | |
970 | current_buffer = prev; | |
971 | } | |
972 | } | |
973 | #endif /* MULTI_FRAME */ | |
0e9d6dd3 | 974 | #endif /* 0 */ |
284f4730 | 975 | |
8f805655 JB |
976 | /* Read next key sequence; i gets its length. */ |
977 | i = read_key_sequence (keybuf, (sizeof keybuf / sizeof (keybuf[0])), 0); | |
978 | ||
979 | ++num_input_keys; | |
980 | ||
284f4730 JB |
981 | /* Now we have read a key sequence of length I, |
982 | or else I is 0 and we found end of file. */ | |
983 | ||
984 | if (i == 0) /* End of file -- happens only in */ | |
985 | return Qnil; /* a kbd macro, at the end. */ | |
986 | ||
284f4730 JB |
987 | last_command_char = keybuf[i - 1]; |
988 | ||
75c0b143 RS |
989 | /* If the previous command tried to force a specific window-start, |
990 | forget about that, in case this command moves point far away | |
991 | from that position. */ | |
992 | XWINDOW (selected_window)->force_start = Qnil; | |
993 | ||
284f4730 JB |
994 | cmd = read_key_sequence_cmd; |
995 | if (!NILP (Vexecuting_macro)) | |
996 | { | |
997 | if (!NILP (Vquit_flag)) | |
998 | { | |
999 | Vexecuting_macro = Qt; | |
1000 | QUIT; /* Make some noise. */ | |
1001 | /* Will return since macro now empty. */ | |
1002 | } | |
1003 | } | |
1004 | ||
1005 | /* Do redisplay processing after this command except in special | |
1006 | cases identified below that set no_redisplay to 1. */ | |
1007 | no_redisplay = 0; | |
1008 | ||
86e5706b RS |
1009 | prev_buffer = current_buffer; |
1010 | prev_modiff = MODIFF; | |
1011 | ||
284f4730 JB |
1012 | /* Execute the command. */ |
1013 | ||
86e5706b RS |
1014 | this_command = cmd; |
1015 | if (!NILP (Vpre_command_hook)) | |
1016 | call1 (Vrun_hooks, Qpre_command_hook); | |
1017 | ||
258bf746 | 1018 | if (NILP (this_command)) |
284f4730 JB |
1019 | { |
1020 | /* nil means key is undefined. */ | |
1021 | bitch_at_user (); | |
1022 | defining_kbd_macro = 0; | |
1023 | update_mode_lines = 1; | |
1024 | Vprefix_arg = Qnil; | |
86e5706b | 1025 | |
284f4730 JB |
1026 | } |
1027 | else | |
1028 | { | |
284f4730 JB |
1029 | if (NILP (Vprefix_arg) && ! no_direct) |
1030 | { | |
1031 | /* Recognize some common commands in common situations and | |
1032 | do them directly. */ | |
258bf746 | 1033 | if (EQ (this_command, Qforward_char) && point < ZV) |
284f4730 JB |
1034 | { |
1035 | struct Lisp_Vector *dp | |
1036 | = window_display_table (XWINDOW (selected_window)); | |
1037 | lose = FETCH_CHAR (point); | |
1038 | SET_PT (point + 1); | |
0f7a8fee JB |
1039 | if ((dp |
1040 | ? (XTYPE (DISP_CHAR_VECTOR (dp, lose)) != Lisp_Vector | |
06ddfb24 | 1041 | && XVECTOR (DISP_CHAR_VECTOR (dp, lose))->size == 1) |
0f7a8fee | 1042 | : (lose >= 0x20 && lose < 0x7f)) |
284f4730 JB |
1043 | && (XFASTINT (XWINDOW (selected_window)->last_modified) |
1044 | >= MODIFF) | |
1045 | && (XFASTINT (XWINDOW (selected_window)->last_point) | |
1046 | == point - 1) | |
1047 | && !windows_or_buffers_changed | |
1048 | && EQ (current_buffer->selective_display, Qnil) | |
1049 | && !detect_input_pending () | |
1050 | && NILP (Vexecuting_macro)) | |
1051 | no_redisplay = direct_output_forward_char (1); | |
1052 | goto directly_done; | |
1053 | } | |
258bf746 | 1054 | else if (EQ (this_command, Qbackward_char) && point > BEGV) |
284f4730 JB |
1055 | { |
1056 | struct Lisp_Vector *dp | |
1057 | = window_display_table (XWINDOW (selected_window)); | |
1058 | SET_PT (point - 1); | |
1059 | lose = FETCH_CHAR (point); | |
0f7a8fee JB |
1060 | if ((dp |
1061 | ? (XTYPE (DISP_CHAR_VECTOR (dp, lose)) != Lisp_Vector | |
06ddfb24 | 1062 | && XVECTOR (DISP_CHAR_VECTOR (dp, lose))->size == 1) |
0f7a8fee | 1063 | : (lose >= 0x20 && lose < 0x7f)) |
284f4730 JB |
1064 | && (XFASTINT (XWINDOW (selected_window)->last_modified) |
1065 | >= MODIFF) | |
1066 | && (XFASTINT (XWINDOW (selected_window)->last_point) | |
1067 | == point + 1) | |
1068 | && !windows_or_buffers_changed | |
1069 | && EQ (current_buffer->selective_display, Qnil) | |
1070 | && !detect_input_pending () | |
1071 | && NILP (Vexecuting_macro)) | |
1072 | no_redisplay = direct_output_forward_char (-1); | |
1073 | goto directly_done; | |
1074 | } | |
258bf746 | 1075 | else if (EQ (this_command, Qself_insert_command) |
284f4730 JB |
1076 | /* Try this optimization only on ascii keystrokes. */ |
1077 | && XTYPE (last_command_char) == Lisp_Int) | |
1078 | { | |
1079 | unsigned char c = XINT (last_command_char); | |
1080 | ||
1081 | if (NILP (Vexecuting_macro) && | |
1082 | !EQ (minibuf_window, selected_window)) | |
1083 | { | |
1084 | if (!nonundocount || nonundocount >= 20) | |
1085 | { | |
1086 | Fundo_boundary (); | |
1087 | nonundocount = 0; | |
1088 | } | |
1089 | nonundocount++; | |
1090 | } | |
1091 | lose = (XFASTINT (XWINDOW (selected_window)->last_modified) | |
1092 | < MODIFF) | |
1093 | || (XFASTINT (XWINDOW (selected_window)->last_point) | |
1094 | != point) | |
1095 | || MODIFF <= current_buffer->save_modified | |
1096 | || windows_or_buffers_changed | |
1097 | || !EQ (current_buffer->selective_display, Qnil) | |
1098 | || detect_input_pending () | |
1099 | || !NILP (Vexecuting_macro); | |
b8d9050d | 1100 | if (internal_self_insert (c, 0)) |
284f4730 JB |
1101 | { |
1102 | lose = 1; | |
1103 | nonundocount = 0; | |
1104 | } | |
1105 | if (!lose && | |
1106 | (point == ZV || FETCH_CHAR (point) == '\n')) | |
1107 | { | |
1108 | struct Lisp_Vector *dp | |
1109 | = window_display_table (XWINDOW (selected_window)); | |
b8d9050d | 1110 | int lose = c; |
284f4730 | 1111 | |
0f7a8fee JB |
1112 | if (dp) |
1113 | { | |
1114 | Lisp_Object obj = DISP_CHAR_VECTOR (dp, lose); | |
1115 | ||
1116 | if (XTYPE (obj) == Lisp_Vector | |
1117 | && XVECTOR (obj)->size == 1 | |
1118 | && (XTYPE (obj = XVECTOR (obj)->contents[0]) | |
1119 | == Lisp_Int)) | |
1120 | no_redisplay = | |
1121 | direct_output_for_insert (XINT (obj)); | |
1122 | } | |
1123 | else | |
1124 | { | |
1125 | if (lose >= 0x20 && lose <= 0x7e) | |
1126 | no_redisplay = direct_output_for_insert (lose); | |
1127 | } | |
284f4730 JB |
1128 | } |
1129 | goto directly_done; | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | /* Here for a command that isn't executed directly */ | |
1134 | ||
1135 | nonundocount = 0; | |
1136 | if (NILP (Vprefix_arg)) | |
1137 | Fundo_boundary (); | |
258bf746 | 1138 | Fcommand_execute (this_command, Qnil); |
284f4730 | 1139 | |
284f4730 | 1140 | } |
a764a753 | 1141 | directly_done: ; |
284f4730 | 1142 | |
86e5706b RS |
1143 | if (!NILP (Vpost_command_hook)) |
1144 | call1 (Vrun_hooks, Qpost_command_hook); | |
1145 | ||
284f4730 JB |
1146 | /* If there is a prefix argument, |
1147 | 1) We don't want last_command to be ``universal-argument'' | |
1148 | (that would be dumb), so don't set last_command, | |
1149 | 2) we want to leave echoing on so that the prefix will be | |
1150 | echoed as part of this key sequence, so don't call | |
1151 | cancel_echoing, and | |
1152 | 3) we want to leave this_command_key_count non-zero, so that | |
1153 | read_char will realize that it is re-reading a character, and | |
1154 | not echo it a second time. */ | |
1155 | if (NILP (Vprefix_arg)) | |
1156 | { | |
1157 | last_command = this_command; | |
1158 | cancel_echoing (); | |
1159 | this_command_key_count = 0; | |
1160 | } | |
86e5706b RS |
1161 | |
1162 | if (!NILP (current_buffer->mark_active)) | |
1163 | { | |
1164 | if (!NILP (Vdeactivate_mark) && !NILP (Vtransient_mark_mode)) | |
1165 | { | |
1166 | current_buffer->mark_active = Qnil; | |
1167 | call1 (Vrun_hooks, intern ("deactivate-mark-hook")); | |
1168 | } | |
1169 | else if (current_buffer != prev_buffer || MODIFF != prev_modiff) | |
1170 | call1 (Vrun_hooks, intern ("activate-mark-hook")); | |
1171 | } | |
284f4730 JB |
1172 | } |
1173 | } | |
1174 | \f | |
1175 | /* Number of seconds between polling for input. */ | |
1176 | int polling_period; | |
1177 | ||
eb8c3be9 | 1178 | /* Nonzero means polling for input is temporarily suppressed. */ |
284f4730 JB |
1179 | int poll_suppress_count; |
1180 | ||
1181 | #ifdef POLL_FOR_INPUT | |
1182 | int polling_for_input; | |
1183 | ||
1184 | /* Handle an alarm once each second and read pending input | |
1185 | so as to handle a C-g if it comces in. */ | |
1186 | ||
1187 | SIGTYPE | |
1188 | input_poll_signal () | |
1189 | { | |
9ac0d9e0 JB |
1190 | if (interrupt_input_blocked == 0 |
1191 | && !waiting_for_input) | |
1192 | read_avail_input (0); | |
284f4730 JB |
1193 | signal (SIGALRM, input_poll_signal); |
1194 | alarm (polling_period); | |
1195 | } | |
1196 | ||
1197 | #endif | |
1198 | ||
1199 | /* Begin signals to poll for input, if they are appropriate. | |
1200 | This function is called unconditionally from various places. */ | |
1201 | ||
1202 | start_polling () | |
1203 | { | |
1204 | #ifdef POLL_FOR_INPUT | |
1205 | if (read_socket_hook) | |
1206 | { | |
1207 | poll_suppress_count--; | |
1208 | if (poll_suppress_count == 0) | |
1209 | { | |
1210 | signal (SIGALRM, input_poll_signal); | |
1211 | polling_for_input = 1; | |
1212 | alarm (polling_period); | |
1213 | } | |
1214 | } | |
1215 | #endif | |
1216 | } | |
1217 | ||
1218 | /* Turn off polling. */ | |
1219 | ||
1220 | stop_polling () | |
1221 | { | |
1222 | #ifdef POLL_FOR_INPUT | |
1223 | if (read_socket_hook) | |
1224 | { | |
1225 | if (poll_suppress_count == 0) | |
1226 | { | |
1227 | polling_for_input = 0; | |
1228 | alarm (0); | |
1229 | } | |
1230 | poll_suppress_count++; | |
1231 | } | |
1232 | #endif | |
1233 | } | |
1234 | \f | |
faf5e407 JB |
1235 | /* Applying the control modifier to CHARACTER. */ |
1236 | int | |
1237 | make_ctrl_char (c) | |
1238 | int c; | |
1239 | { | |
d205953b JB |
1240 | /* Save the upper bits here. */ |
1241 | int upper = c & ~0177; | |
1242 | ||
1243 | c &= 0177; | |
1244 | ||
1245 | /* Everything in the columns containing the upper-case letters | |
1246 | denotes a control character. */ | |
1247 | if (c >= 0100 && c < 0140) | |
1248 | { | |
1249 | int oc = c; | |
1250 | c &= ~0140; | |
1251 | /* Set the shift modifier for a control char | |
1252 | made from a shifted letter. But only for letters! */ | |
1253 | if (oc >= 'A' && oc <= 'Z') | |
1254 | c |= shift_modifier; | |
1255 | } | |
1256 | ||
1257 | /* The lower-case letters denote control characters too. */ | |
1258 | else if (c >= 'a' && c <= 'z') | |
1259 | c &= ~0140; | |
1260 | ||
1261 | /* Include the bits for control and shift | |
1262 | only if the basic ASCII code can't indicate them. */ | |
1263 | else if (c >= ' ') | |
1264 | c |= ctrl_modifier; | |
1265 | ||
1266 | /* Replace the high bits. */ | |
1267 | c |= (upper & ~ctrl_modifier); | |
faf5e407 JB |
1268 | |
1269 | return c; | |
1270 | } | |
1271 | ||
1272 | ||
1273 | \f | |
284f4730 JB |
1274 | /* Input of single characters from keyboard */ |
1275 | ||
1276 | Lisp_Object print_help (); | |
1277 | static Lisp_Object kbd_buffer_get_event (); | |
1278 | ||
1279 | /* read a character from the keyboard; call the redisplay if needed */ | |
1280 | /* commandflag 0 means do not do auto-saving, but do do redisplay. | |
1281 | -1 means do not do redisplay, but do do autosaving. | |
1282 | 1 means do both. */ | |
1283 | ||
7d6de002 RS |
1284 | /* The arguments MAPS and NMAPS are for menu prompting. |
1285 | MAPS is an array of keymaps; NMAPS is the length of MAPS. | |
1286 | ||
1287 | PREV_EVENT is the previous input event, or nil if we are reading | |
1288 | the first event of a key sequence. | |
1289 | ||
6569cc8d JB |
1290 | If USED_MOUSE_MENU is non-zero, then we set *USED_MOUSE_MENU to 1 |
1291 | if we used a mouse menu to read the input, or zero otherwise. If | |
1292 | USED_MOUSE_MENU is zero, *USED_MOUSE_MENU is left alone. */ | |
7d6de002 | 1293 | |
284f4730 | 1294 | Lisp_Object |
7d6de002 | 1295 | read_char (commandflag, nmaps, maps, prev_event, used_mouse_menu) |
284f4730 | 1296 | int commandflag; |
7d6de002 RS |
1297 | int nmaps; |
1298 | Lisp_Object *maps; | |
1299 | Lisp_Object prev_event; | |
1300 | int *used_mouse_menu; | |
284f4730 JB |
1301 | { |
1302 | register Lisp_Object c; | |
1303 | int count; | |
1304 | jmp_buf save_jump; | |
1305 | ||
dbc4e1c1 | 1306 | if (CONSP (unread_command_events)) |
284f4730 | 1307 | { |
dbc4e1c1 JB |
1308 | c = XCONS (unread_command_events)->car; |
1309 | unread_command_events = XCONS (unread_command_events)->cdr; | |
284f4730 | 1310 | |
284f4730 JB |
1311 | if (this_command_key_count == 0) |
1312 | goto reread_first; | |
1313 | else | |
1314 | goto reread; | |
1315 | } | |
1316 | ||
86e5706b RS |
1317 | if (unread_command_char != -1) |
1318 | { | |
1319 | XSET (c, Lisp_Int, unread_command_char); | |
1320 | unread_command_char = -1; | |
1321 | ||
1322 | if (this_command_key_count == 0) | |
1323 | goto reread_first; | |
1324 | else | |
1325 | goto reread; | |
1326 | } | |
1327 | ||
284f4730 JB |
1328 | if (!NILP (Vexecuting_macro)) |
1329 | { | |
07d2b8de | 1330 | #ifdef MULTI_FRAME |
fce33686 JB |
1331 | /* We set this to Qmacro; since that's not a frame, nobody will |
1332 | try to switch frames on us, and the selected window will | |
1333 | remain unchanged. | |
1334 | ||
1335 | Since this event came from a macro, it would be misleading to | |
eb8c3be9 | 1336 | leave internal_last_event_frame set to wherever the last |
3c370943 JB |
1337 | real event came from. Normally, a switch-frame event selects |
1338 | internal_last_event_frame after each command is read, but | |
1339 | events read from a macro should never cause a new frame to be | |
1340 | selected. */ | |
1341 | Vlast_event_frame = internal_last_event_frame = Qmacro; | |
07d2b8de | 1342 | #endif |
fce33686 | 1343 | |
663258f2 JB |
1344 | /* Exit the macro if we are at the end. |
1345 | Also, some things replace the macro with t | |
1346 | to force an early exit. */ | |
1347 | if (EQ (Vexecuting_macro, Qt) | |
1348 | || executing_macro_index >= XFASTINT (Flength (Vexecuting_macro))) | |
284f4730 JB |
1349 | { |
1350 | XSET (c, Lisp_Int, -1); | |
1351 | return c; | |
1352 | } | |
1353 | ||
1354 | c = Faref (Vexecuting_macro, make_number (executing_macro_index)); | |
86e5706b RS |
1355 | if (XTYPE (Vexecuting_macro) == Lisp_String |
1356 | && (XINT (c) & 0x80)) | |
1357 | XFASTINT (c) = CHAR_META | (XINT (c) & ~0x80); | |
1358 | ||
284f4730 JB |
1359 | executing_macro_index++; |
1360 | ||
1361 | goto from_macro; | |
1362 | } | |
1363 | ||
cd21b839 JB |
1364 | if (!NILP (unread_switch_frame)) |
1365 | { | |
1366 | c = unread_switch_frame; | |
1367 | unread_switch_frame = Qnil; | |
1368 | ||
1369 | /* This event should make it into this_command_keys, and get echoed | |
f4255cd1 JB |
1370 | again, so we go to reread_first, rather than reread. */ |
1371 | goto reread_first; | |
cd21b839 JB |
1372 | } |
1373 | ||
284f4730 | 1374 | /* Save outer setjmp data, in case called recursively. */ |
f76475ad | 1375 | save_getcjmp (save_jump); |
284f4730 JB |
1376 | |
1377 | stop_polling (); | |
1378 | ||
1379 | if (commandflag >= 0 && !input_pending && !detect_input_pending ()) | |
1380 | redisplay (); | |
1381 | ||
1382 | if (_setjmp (getcjmp)) | |
1383 | { | |
1384 | XSET (c, Lisp_Int, quit_char); | |
07d2b8de | 1385 | #ifdef MULTI_FRAME |
3c370943 JB |
1386 | XSET (internal_last_event_frame, Lisp_Frame, selected_frame); |
1387 | Vlast_event_frame = internal_last_event_frame; | |
07d2b8de | 1388 | #endif |
04904c29 RS |
1389 | /* If we report the quit char as an event, |
1390 | don't do so more than once. */ | |
1391 | if (!NILP (Vinhibit_quit)) | |
1392 | Vquit_flag = Qnil; | |
284f4730 | 1393 | |
284f4730 JB |
1394 | goto non_reread; |
1395 | } | |
1396 | ||
1397 | /* Message turns off echoing unless more keystrokes turn it on again. */ | |
1398 | if (echo_area_glyphs && *echo_area_glyphs && echo_area_glyphs != echobuf) | |
1399 | cancel_echoing (); | |
1400 | else | |
1401 | /* If already echoing, continue. */ | |
1402 | echo_dash (); | |
1403 | ||
1404 | /* If in middle of key sequence and minibuffer not active, | |
1405 | start echoing if enough time elapses. */ | |
1406 | if (minibuf_level == 0 && !immediate_echo && this_command_key_count > 0 | |
1407 | && echo_keystrokes > 0 | |
1408 | && (echo_area_glyphs == 0 || *echo_area_glyphs == 0)) | |
1409 | { | |
1410 | Lisp_Object tem0; | |
1411 | ||
7d6de002 RS |
1412 | /* After a mouse event, start echoing right away. |
1413 | This is because we are probably about to display a menu, | |
1414 | and we don't want to delay before doing so. */ | |
dbc4e1c1 | 1415 | if (EVENT_HAS_PARAMETERS (prev_event)) |
284f4730 | 1416 | echo (); |
7d6de002 RS |
1417 | else |
1418 | { | |
1419 | tem0 = sit_for (echo_keystrokes, 0, 1, 1); | |
1420 | if (EQ (tem0, Qt)) | |
1421 | echo (); | |
1422 | } | |
284f4730 JB |
1423 | } |
1424 | ||
1425 | /* Maybe auto save due to number of keystrokes or idle time. */ | |
1426 | ||
1427 | if (commandflag != 0 | |
1428 | && auto_save_interval > 0 | |
51172b6d | 1429 | && num_nonmacro_input_chars - last_auto_save > max (auto_save_interval, 20) |
284f4730 JB |
1430 | && !detect_input_pending ()) |
1431 | { | |
1432 | jmp_buf temp; | |
1433 | save_getcjmp (temp); | |
1434 | Fdo_auto_save (Qnil, Qnil); | |
1435 | restore_getcjmp (temp); | |
1436 | } | |
1437 | ||
7d6de002 RS |
1438 | /* Try reading a character via menu prompting. |
1439 | Try this before the sit-for, because the sit-for | |
1440 | would do the wrong thing if we are supposed to do | |
1441 | menu prompting. */ | |
1442 | c = Qnil; | |
1443 | if (INTERACTIVE && !NILP (prev_event)) | |
1444 | c = read_char_menu_prompt (nmaps, maps, prev_event, used_mouse_menu); | |
1445 | ||
284f4730 JB |
1446 | /* Slow down auto saves logarithmically in size of current buffer, |
1447 | and garbage collect while we're at it. */ | |
7d6de002 RS |
1448 | if (NILP (c)) |
1449 | { | |
1450 | int delay_level, buffer_size; | |
1451 | ||
1452 | if (! MINI_WINDOW_P (XWINDOW (selected_window))) | |
1453 | last_non_minibuf_size = Z - BEG; | |
1454 | buffer_size = (last_non_minibuf_size >> 8) + 1; | |
1455 | delay_level = 0; | |
1456 | while (buffer_size > 64) | |
1457 | delay_level++, buffer_size -= buffer_size >> 2; | |
1458 | if (delay_level < 4) delay_level = 4; | |
1459 | /* delay_level is 4 for files under around 50k, 7 at 100k, | |
1460 | 9 at 200k, 11 at 300k, and 12 at 500k. It is 15 at 1 meg. */ | |
1461 | ||
1462 | /* Auto save if enough time goes by without input. */ | |
1463 | if (commandflag != 0 | |
51172b6d | 1464 | && num_nonmacro_input_chars > last_auto_save |
7d6de002 RS |
1465 | && XTYPE (Vauto_save_timeout) == Lisp_Int |
1466 | && XINT (Vauto_save_timeout) > 0) | |
1467 | { | |
1468 | Lisp_Object tem0; | |
1469 | int delay = delay_level * XFASTINT (Vauto_save_timeout) / 4; | |
1470 | tem0 = sit_for (delay, 0, 1, 1); | |
1471 | if (EQ (tem0, Qt)) | |
1472 | { | |
1473 | jmp_buf temp; | |
1474 | save_getcjmp (temp); | |
1475 | Fdo_auto_save (Qnil, Qnil); | |
1476 | restore_getcjmp (temp); | |
1477 | ||
1478 | /* If we have auto-saved and there is still no input | |
1479 | available, garbage collect if there has been enough | |
1480 | consing going on to make it worthwhile. */ | |
1481 | if (!detect_input_pending () | |
1482 | && consing_since_gc > gc_cons_threshold / 2) | |
1483 | Fgarbage_collect (); | |
1484 | } | |
1485 | } | |
1486 | } | |
284f4730 JB |
1487 | |
1488 | /* Actually read a character, waiting if necessary. */ | |
4eb4f926 | 1489 | while (NILP (c)) |
1e12dd87 RS |
1490 | { |
1491 | c = kbd_buffer_get_event (); | |
1492 | if (!NILP (c)) | |
1493 | break; | |
1494 | if (commandflag >= 0 && !input_pending && !detect_input_pending ()) | |
1495 | redisplay (); | |
1496 | } | |
284f4730 | 1497 | |
284f4730 | 1498 | /* Terminate Emacs in batch mode if at eof. */ |
7d6de002 | 1499 | if (noninteractive && XTYPE (c) == Lisp_Int && XINT (c) < 0) |
284f4730 JB |
1500 | Fkill_emacs (make_number (1)); |
1501 | ||
80645119 JB |
1502 | if (XTYPE (c) == Lisp_Int) |
1503 | { | |
1504 | /* Add in any extra modifiers, where appropriate. */ | |
1505 | if ((extra_keyboard_modifiers & CHAR_CTL) | |
1506 | || ((extra_keyboard_modifiers & 0177) < ' ' | |
1507 | && (extra_keyboard_modifiers & 0177) != 0)) | |
faf5e407 | 1508 | XSETINT (c, make_ctrl_char (XINT (c))); |
80645119 JB |
1509 | |
1510 | /* Transfer any other modifier bits directly from | |
1511 | extra_keyboard_modifiers to c. Ignore the actual character code | |
1512 | in the low 16 bits of extra_keyboard_modifiers. */ | |
b8d9050d | 1513 | XSETINT (c, XINT (c) | (extra_keyboard_modifiers & ~0xff7f & ~CHAR_CTL)); |
80645119 | 1514 | } |
9fa4395d | 1515 | |
284f4730 JB |
1516 | non_reread: |
1517 | ||
f76475ad | 1518 | restore_getcjmp (save_jump); |
284f4730 JB |
1519 | |
1520 | start_polling (); | |
1521 | ||
1522 | echo_area_glyphs = 0; | |
1523 | ||
1524 | /* Handle things that only apply to characters. */ | |
1525 | if (XTYPE (c) == Lisp_Int) | |
1526 | { | |
1527 | /* If kbd_buffer_get_event gave us an EOF, return that. */ | |
86e5706b | 1528 | if (XINT (c) == -1) |
284f4730 JB |
1529 | return c; |
1530 | ||
284f4730 | 1531 | if (XTYPE (Vkeyboard_translate_table) == Lisp_String |
f4255cd1 JB |
1532 | && XSTRING (Vkeyboard_translate_table)->size > XFASTINT (c)) |
1533 | XSETINT (c, XSTRING (Vkeyboard_translate_table)->data[XFASTINT (c)]); | |
284f4730 JB |
1534 | } |
1535 | ||
1536 | total_keys++; | |
5160df46 JB |
1537 | XVECTOR (recent_keys)->contents[recent_keys_index] = c; |
1538 | if (++recent_keys_index >= NUM_RECENT_KEYS) | |
284f4730 JB |
1539 | recent_keys_index = 0; |
1540 | ||
1541 | /* Write c to the dribble file. If c is a lispy event, write | |
1542 | the event's symbol to the dribble file, in <brackets>. Bleaugh. | |
1543 | If you, dear reader, have a better idea, you've got the source. :-) */ | |
1544 | if (dribble) | |
1545 | { | |
1546 | if (XTYPE (c) == Lisp_Int) | |
f4255cd1 | 1547 | putc (XINT (c), dribble); |
284f4730 JB |
1548 | else |
1549 | { | |
1550 | Lisp_Object dribblee = c; | |
1551 | ||
1552 | /* If it's a structured event, take the event header. */ | |
88cb0656 | 1553 | dribblee = EVENT_HEAD (dribblee); |
284f4730 | 1554 | |
8f805655 | 1555 | if (XTYPE (dribblee) == Lisp_Symbol) |
284f4730 JB |
1556 | { |
1557 | putc ('<', dribble); | |
8f805655 JB |
1558 | fwrite (XSYMBOL (dribblee)->name->data, sizeof (char), |
1559 | XSYMBOL (dribblee)->name->size, | |
284f4730 JB |
1560 | dribble); |
1561 | putc ('>', dribble); | |
1562 | } | |
1563 | } | |
1564 | ||
1565 | fflush (dribble); | |
1566 | } | |
1567 | ||
1568 | store_kbd_macro_char (c); | |
1569 | ||
51172b6d RS |
1570 | num_nonmacro_input_chars++; |
1571 | ||
284f4730 JB |
1572 | from_macro: |
1573 | reread_first: | |
284f4730 | 1574 | |
4bb994d1 JB |
1575 | /* Record this character as part of the current key. |
1576 | Don't record mouse motion; it should never matter. */ | |
1577 | if (! (EVENT_HAS_PARAMETERS (c) | |
1578 | && EQ (EVENT_HEAD_KIND (EVENT_HEAD (c)), Qmouse_movement))) | |
7b4aedb9 JB |
1579 | { |
1580 | echo_char (c); | |
1581 | add_command_key (c); | |
1582 | } | |
284f4730 JB |
1583 | |
1584 | /* Re-reading in the middle of a command */ | |
1585 | reread: | |
1586 | last_input_char = c; | |
1587 | num_input_chars++; | |
1588 | ||
1589 | /* Process the help character specially if enabled */ | |
1590 | if (EQ (c, help_char) && !NILP (Vhelp_form)) | |
1591 | { | |
1592 | Lisp_Object tem0; | |
1593 | count = specpdl_ptr - specpdl; | |
1594 | ||
1595 | record_unwind_protect (Fset_window_configuration, | |
1596 | Fcurrent_window_configuration (Qnil)); | |
1597 | ||
1598 | tem0 = Feval (Vhelp_form); | |
1599 | if (XTYPE (tem0) == Lisp_String) | |
1600 | internal_with_output_to_temp_buffer ("*Help*", print_help, tem0); | |
1601 | ||
1602 | cancel_echoing (); | |
6569cc8d | 1603 | c = read_char (0, 0, 0, Qnil, 0); |
ff11dfa1 | 1604 | /* Remove the help from the frame */ |
284f4730 JB |
1605 | unbind_to (count, Qnil); |
1606 | redisplay (); | |
1607 | if (EQ (c, make_number (040))) | |
1608 | { | |
1609 | cancel_echoing (); | |
7d6de002 | 1610 | c = read_char (0, 0, 0, Qnil, 0); |
284f4730 JB |
1611 | } |
1612 | } | |
1613 | ||
1614 | return c; | |
1615 | } | |
1616 | ||
1617 | Lisp_Object | |
1618 | print_help (object) | |
1619 | Lisp_Object object; | |
1620 | { | |
1621 | Fprinc (object, Qnil); | |
1622 | return Qnil; | |
1623 | } | |
1624 | ||
1625 | /* Copy out or in the info on where C-g should throw to. | |
1626 | This is used when running Lisp code from within get_char, | |
1627 | in case get_char is called recursively. | |
1628 | See read_process_output. */ | |
1629 | ||
1630 | save_getcjmp (temp) | |
1631 | jmp_buf temp; | |
1632 | { | |
1633 | bcopy (getcjmp, temp, sizeof getcjmp); | |
1634 | } | |
1635 | ||
1636 | restore_getcjmp (temp) | |
1637 | jmp_buf temp; | |
1638 | { | |
1639 | bcopy (temp, getcjmp, sizeof getcjmp); | |
1640 | } | |
1641 | ||
1642 | \f | |
1643 | /* Low level keyboard/mouse input. | |
1644 | kbd_buffer_store_event places events in kbd_buffer, and | |
1645 | kbd_buffer_get_event retrieves them. | |
1646 | mouse_moved indicates when the mouse has moved again, and | |
1647 | *mouse_position_hook provides the mouse position. */ | |
1648 | ||
1649 | /* Set this for debugging, to have a way to get out */ | |
1650 | int stop_character; | |
1651 | ||
ff11dfa1 | 1652 | extern int frame_garbaged; |
284f4730 JB |
1653 | |
1654 | /* Return true iff there are any events in the queue that read-char | |
1655 | would return. If this returns false, a read-char would block. */ | |
1656 | static int | |
1657 | readable_events () | |
1658 | { | |
88cb0656 | 1659 | return ! EVENT_QUEUES_EMPTY; |
284f4730 JB |
1660 | } |
1661 | ||
1662 | ||
1663 | /* Restore mouse tracking enablement. See Ftrack_mouse for the only use | |
1664 | of this function. */ | |
1665 | static Lisp_Object | |
1666 | tracking_off (old_value) | |
1667 | Lisp_Object old_value; | |
1668 | { | |
1669 | if (! XFASTINT (old_value)) | |
1670 | { | |
1671 | do_mouse_tracking = 0; | |
1672 | ||
1673 | /* Redisplay may have been preempted because there was input | |
1674 | available, and it assumes it will be called again after the | |
1675 | input has been processed. If the only input available was | |
1676 | the sort that we have just disabled, then we need to call | |
1677 | redisplay. */ | |
1678 | if (!readable_events ()) | |
1679 | { | |
1680 | redisplay_preserve_echo_area (); | |
1681 | get_input_pending (&input_pending); | |
1682 | } | |
1683 | } | |
1684 | } | |
1685 | ||
1686 | DEFUN ("track-mouse", Ftrack_mouse, Strack_mouse, 0, UNEVALLED, 0, | |
4bb994d1 JB |
1687 | "Evaluate BODY with mouse movement events enabled.\n\ |
1688 | Within a `track-mouse' form, mouse motion generates input events that\n\ | |
1689 | you can read with `read-event'.\n\ | |
1690 | Normally, mouse motion is ignored.") | |
284f4730 JB |
1691 | (args) |
1692 | Lisp_Object args; | |
1693 | { | |
1694 | int count = specpdl_ptr - specpdl; | |
1695 | Lisp_Object val; | |
1696 | ||
1697 | XSET (val, Lisp_Int, do_mouse_tracking); | |
1698 | record_unwind_protect (tracking_off, val); | |
1699 | ||
1700 | do_mouse_tracking = 1; | |
1701 | ||
1702 | val = Fprogn (args); | |
1703 | return unbind_to (count, val); | |
1704 | } | |
1705 | ||
1706 | /* Store an event obtained at interrupt level into kbd_buffer, fifo */ | |
1707 | ||
1708 | void | |
1709 | kbd_buffer_store_event (event) | |
1710 | register struct input_event *event; | |
1711 | { | |
1712 | if (event->kind == no_event) | |
1713 | abort (); | |
1714 | ||
1715 | if (event->kind == ascii_keystroke) | |
1716 | { | |
1717 | register int c = XFASTINT (event->code) & 0377; | |
1718 | ||
faf5e407 JB |
1719 | if (event->modifiers & ctrl_modifier) |
1720 | c = make_ctrl_char (c); | |
1721 | ||
86e5706b | 1722 | if (c == quit_char) |
284f4730 | 1723 | { |
3e51c7b7 JB |
1724 | extern SIGTYPE interrupt_signal (); |
1725 | ||
07d2b8de | 1726 | #ifdef MULTI_FRAME |
284f4730 | 1727 | /* If this results in a quit_char being returned to Emacs as |
3c370943 | 1728 | input, set Vlast_event_frame properly. If this doesn't |
284f4730 | 1729 | get returned to Emacs as an event, the next event read |
ff11dfa1 | 1730 | will set Vlast_event_frame again, so this is safe to do. */ |
4bb994d1 | 1731 | { |
7b4aedb9 JB |
1732 | Lisp_Object focus = |
1733 | FRAME_FOCUS_FRAME (XFRAME (event->frame_or_window)); | |
4bb994d1 JB |
1734 | |
1735 | if (NILP (focus)) | |
3c370943 | 1736 | internal_last_event_frame = event->frame_or_window; |
4bb994d1 | 1737 | else |
3c370943 JB |
1738 | internal_last_event_frame = focus; |
1739 | Vlast_event_frame = internal_last_event_frame; | |
4bb994d1 | 1740 | } |
07d2b8de | 1741 | #endif |
3e51c7b7 | 1742 | |
ffd56f97 | 1743 | last_event_timestamp = event->timestamp; |
284f4730 JB |
1744 | interrupt_signal (); |
1745 | return; | |
1746 | } | |
1747 | ||
1748 | if (c && c == stop_character) | |
1749 | { | |
1750 | sys_suspend (); | |
1751 | return; | |
1752 | } | |
1753 | ||
1754 | XSET (event->code, Lisp_Int, c); | |
1755 | } | |
1756 | ||
1757 | if (kbd_store_ptr - kbd_buffer == KBD_BUFFER_SIZE) | |
1758 | kbd_store_ptr = kbd_buffer; | |
1759 | ||
1760 | /* Don't let the very last slot in the buffer become full, | |
1761 | since that would make the two pointers equal, | |
1762 | and that is indistinguishable from an empty buffer. | |
1763 | Discard the event if it would fill the last slot. */ | |
1764 | if (kbd_fetch_ptr - 1 != kbd_store_ptr) | |
1765 | { | |
1766 | kbd_store_ptr->kind = event->kind; | |
1767 | kbd_store_ptr->code = event->code; | |
1768 | kbd_store_ptr->part = event->part; | |
7b4aedb9 | 1769 | kbd_store_ptr->frame_or_window = event->frame_or_window; |
284f4730 JB |
1770 | kbd_store_ptr->modifiers = event->modifiers; |
1771 | kbd_store_ptr->x = event->x; | |
1772 | kbd_store_ptr->y = event->y; | |
1773 | kbd_store_ptr->timestamp = event->timestamp; | |
7b4aedb9 JB |
1774 | (XVECTOR (kbd_buffer_frame_or_window)->contents[kbd_store_ptr |
1775 | - kbd_buffer] | |
1776 | = event->frame_or_window); | |
284f4730 JB |
1777 | |
1778 | kbd_store_ptr++; | |
1779 | } | |
1780 | } | |
1781 | ||
1782 | static Lisp_Object make_lispy_event (); | |
1783 | static Lisp_Object make_lispy_movement (); | |
1784 | static Lisp_Object modify_event_symbol (); | |
cd21b839 | 1785 | static Lisp_Object make_lispy_switch_frame (); |
284f4730 JB |
1786 | |
1787 | static Lisp_Object | |
1788 | kbd_buffer_get_event () | |
1789 | { | |
1790 | register int c; | |
1791 | Lisp_Object obj; | |
1792 | ||
1793 | if (noninteractive) | |
1794 | { | |
1795 | c = getchar (); | |
1796 | XSET (obj, Lisp_Int, c); | |
1797 | return obj; | |
1798 | } | |
1799 | ||
48e416d4 | 1800 | retry: |
284f4730 JB |
1801 | /* Wait until there is input available. */ |
1802 | for (;;) | |
1803 | { | |
284f4730 JB |
1804 | if (!EVENT_QUEUES_EMPTY) |
1805 | break; | |
1806 | ||
1807 | /* If the quit flag is set, then read_char will return | |
1808 | quit_char, so that counts as "available input." */ | |
1809 | if (!NILP (Vquit_flag)) | |
1810 | quit_throw_to_read_char (); | |
1811 | ||
1812 | /* One way or another, wait until input is available; then, if | |
1813 | interrupt handlers have not read it, read it now. */ | |
1814 | ||
1815 | #ifdef OLDVMS | |
1816 | wait_for_kbd_input (); | |
1817 | #else | |
1818 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
1819 | #ifdef SIGIO | |
1820 | gobble_input (0); | |
1821 | #endif /* SIGIO */ | |
1822 | if (EVENT_QUEUES_EMPTY) | |
1823 | { | |
f76475ad JB |
1824 | Lisp_Object minus_one; |
1825 | ||
1826 | XSET (minus_one, Lisp_Int, -1); | |
1827 | wait_reading_process_input (0, 0, minus_one, 1); | |
284f4730 JB |
1828 | |
1829 | if (!interrupt_input && EVENT_QUEUES_EMPTY) | |
1830 | { | |
1831 | read_avail_input (0); | |
1832 | } | |
1833 | } | |
1834 | #endif /* not VMS */ | |
1835 | } | |
1836 | ||
1837 | /* At this point, we know that there is a readable event available | |
1838 | somewhere. If the event queue is empty, then there must be a | |
1839 | mouse movement enabled and available. */ | |
1840 | if (kbd_fetch_ptr != kbd_store_ptr) | |
1841 | { | |
cd21b839 | 1842 | struct input_event *event; |
3e51c7b7 | 1843 | |
856bf263 | 1844 | event = ((kbd_fetch_ptr < kbd_buffer + KBD_BUFFER_SIZE) |
cd21b839 JB |
1845 | ? kbd_fetch_ptr |
1846 | : kbd_buffer); | |
3e51c7b7 | 1847 | |
cd21b839 | 1848 | last_event_timestamp = event->timestamp; |
cd21b839 | 1849 | |
4bb994d1 JB |
1850 | obj = Qnil; |
1851 | ||
48e416d4 RS |
1852 | /* These two kinds of events get special handling |
1853 | and don't actually appear to the command loop. */ | |
1854 | if (event->kind == selection_request_event) | |
1855 | { | |
598a9fa7 | 1856 | #ifdef HAVE_X11 |
48e416d4 RS |
1857 | x_handle_selection_request (event); |
1858 | kbd_fetch_ptr = event + 1; | |
598a9fa7 JB |
1859 | #else |
1860 | /* We're getting selection request events, but we don't have | |
1861 | a window system. */ | |
1862 | abort (); | |
1863 | #endif | |
48e416d4 RS |
1864 | } |
1865 | ||
1e12dd87 | 1866 | else if (event->kind == selection_clear_event) |
48e416d4 | 1867 | { |
598a9fa7 | 1868 | #ifdef HAVE_X11 |
48e416d4 RS |
1869 | x_handle_selection_clear (event); |
1870 | kbd_fetch_ptr = event + 1; | |
598a9fa7 JB |
1871 | #else |
1872 | /* We're getting selection request events, but we don't have | |
1873 | a window system. */ | |
1874 | abort (); | |
1875 | #endif | |
48e416d4 RS |
1876 | } |
1877 | ||
4bb994d1 JB |
1878 | /* If this event is on a different frame, return a switch-frame this |
1879 | time, and leave the event in the queue for next time. */ | |
1e12dd87 RS |
1880 | else |
1881 | { | |
a6d53864 | 1882 | #ifdef MULTI_FRAME |
1e12dd87 RS |
1883 | Lisp_Object frame = event->frame_or_window; |
1884 | Lisp_Object focus; | |
7b4aedb9 | 1885 | |
1e12dd87 RS |
1886 | if (XTYPE (frame) == Lisp_Window) |
1887 | frame = WINDOW_FRAME (XWINDOW (frame)); | |
4bb994d1 | 1888 | |
1e12dd87 RS |
1889 | focus = FRAME_FOCUS_FRAME (XFRAME (frame)); |
1890 | if (! NILP (focus)) | |
1891 | frame = focus; | |
07d2b8de | 1892 | |
1e12dd87 RS |
1893 | if (! EQ (frame, internal_last_event_frame) |
1894 | && XFRAME (frame) != selected_frame) | |
1895 | obj = make_lispy_switch_frame (frame); | |
1896 | internal_last_event_frame = frame; | |
a6d53864 | 1897 | #endif /* MULTI_FRAME */ |
4bb994d1 | 1898 | |
1e12dd87 RS |
1899 | /* If we didn't decide to make a switch-frame event, go ahead |
1900 | and build a real event from the queue entry. */ | |
cd21b839 | 1901 | |
1e12dd87 RS |
1902 | if (NILP (obj)) |
1903 | { | |
1904 | obj = make_lispy_event (event); | |
1905 | ||
1906 | /* Wipe out this event, to catch bugs. */ | |
1907 | event->kind = no_event; | |
1908 | (XVECTOR (kbd_buffer_frame_or_window)->contents[event - kbd_buffer] | |
1909 | = Qnil); | |
1910 | ||
1911 | kbd_fetch_ptr = event + 1; | |
1912 | } | |
4bb994d1 | 1913 | } |
284f4730 JB |
1914 | } |
1915 | else if (do_mouse_tracking && mouse_moved) | |
1916 | { | |
4bb994d1 | 1917 | FRAME_PTR f; |
7b4aedb9 | 1918 | Lisp_Object bar_window; |
3c370943 | 1919 | enum scroll_bar_part part; |
e5d77022 JB |
1920 | Lisp_Object x, y; |
1921 | unsigned long time; | |
284f4730 | 1922 | |
7b4aedb9 | 1923 | (*mouse_position_hook) (&f, &bar_window, &part, &x, &y, &time); |
4bb994d1 JB |
1924 | |
1925 | obj = Qnil; | |
284f4730 | 1926 | |
07d2b8de | 1927 | #ifdef MULTI_FRAME |
4bb994d1 JB |
1928 | /* Decide if we should generate a switch-frame event. Don't |
1929 | generate switch-frame events for motion outside of all Emacs | |
1930 | frames. */ | |
1931 | if (f) | |
cd21b839 | 1932 | { |
4bb994d1 JB |
1933 | Lisp_Object frame = FRAME_FOCUS_FRAME (f); |
1934 | ||
1935 | if (NILP (frame)) | |
1936 | XSET (frame, Lisp_Frame, f); | |
1937 | ||
80645119 JB |
1938 | if (! EQ (frame, internal_last_event_frame) |
1939 | && XFRAME (frame) != selected_frame) | |
1940 | obj = make_lispy_switch_frame (internal_last_event_frame); | |
1941 | internal_last_event_frame = frame; | |
cd21b839 | 1942 | } |
07d2b8de | 1943 | #endif |
4bb994d1 JB |
1944 | |
1945 | /* If we didn't decide to make a switch-frame event, go ahead and | |
1946 | return a mouse-motion event. */ | |
1947 | if (NILP (obj)) | |
7b4aedb9 | 1948 | obj = make_lispy_movement (f, bar_window, part, x, y, time); |
4bb994d1 | 1949 | } |
284f4730 JB |
1950 | else |
1951 | /* We were promised by the above while loop that there was | |
1952 | something for us to read! */ | |
1953 | abort (); | |
1954 | ||
1e12dd87 | 1955 | #if 0 |
48e416d4 RS |
1956 | /* If something gave back nil as the Lispy event, |
1957 | it means the event was discarded, so try again. */ | |
1958 | if (NILP (obj)) | |
1959 | goto retry; | |
1e12dd87 | 1960 | #endif |
48e416d4 | 1961 | |
284f4730 JB |
1962 | input_pending = readable_events (); |
1963 | ||
3c370943 JB |
1964 | #ifdef MULTI_FRAME |
1965 | Vlast_event_frame = internal_last_event_frame; | |
1966 | #endif | |
1967 | ||
284f4730 JB |
1968 | return (obj); |
1969 | } | |
1970 | ||
3a3b9632 RS |
1971 | /* Process any events that are not user-visible. */ |
1972 | ||
1973 | void | |
1974 | swallow_events () | |
1975 | { | |
1976 | while (kbd_fetch_ptr != kbd_store_ptr) | |
1977 | { | |
1978 | struct input_event *event; | |
1979 | ||
1980 | event = ((kbd_fetch_ptr < kbd_buffer + KBD_BUFFER_SIZE) | |
1981 | ? kbd_fetch_ptr | |
1982 | : kbd_buffer); | |
1983 | ||
1984 | last_event_timestamp = event->timestamp; | |
1985 | ||
1986 | /* These two kinds of events get special handling | |
1987 | and don't actually appear to the command loop. */ | |
1988 | if (event->kind == selection_request_event) | |
1989 | { | |
1990 | #ifdef HAVE_X11 | |
1991 | x_handle_selection_request (event); | |
1992 | kbd_fetch_ptr = event + 1; | |
1993 | #else | |
1994 | /* We're getting selection request events, but we don't have | |
1995 | a window system. */ | |
1996 | abort (); | |
1997 | #endif | |
1998 | } | |
1999 | ||
2000 | else if (event->kind == selection_clear_event) | |
2001 | { | |
2002 | #ifdef HAVE_X11 | |
2003 | x_handle_selection_clear (event); | |
2004 | kbd_fetch_ptr = event + 1; | |
2005 | #else | |
2006 | /* We're getting selection request events, but we don't have | |
2007 | a window system. */ | |
2008 | abort (); | |
2009 | #endif | |
2010 | } | |
2011 | else | |
2012 | break; | |
2013 | } | |
2014 | ||
2015 | get_input_pending (&input_pending); | |
2016 | } | |
4bb994d1 | 2017 | |
284f4730 JB |
2018 | /* Caches for modify_event_symbol. */ |
2019 | static Lisp_Object func_key_syms; | |
2020 | static Lisp_Object mouse_syms; | |
2021 | ||
2022 | /* You'll notice that this table is arranged to be conveniently | |
2023 | indexed by X Windows keysym values. */ | |
2024 | static char *lispy_function_keys[] = | |
2025 | { | |
2026 | /* X Keysym value */ | |
2027 | ||
a6d53864 | 2028 | "remove", 0, 0, 0, 0, 0, 0, 0, /* 0xff00 */ |
86e5706b RS |
2029 | "backspace", |
2030 | "tab", | |
2031 | "linefeed", | |
2032 | "clear", | |
2033 | 0, | |
2034 | "return", | |
2035 | 0, 0, | |
2036 | 0, 0, 0, /* 0xff10 */ | |
2037 | "pause", | |
2038 | 0, 0, 0, 0, 0, 0, 0, | |
2039 | "escape", | |
2040 | 0, 0, 0, 0, | |
2041 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff20...2f */ | |
2042 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff30...3f */ | |
2043 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff40...4f */ | |
2044 | ||
284f4730 JB |
2045 | "home", /* 0xff50 */ /* IsCursorKey */ |
2046 | "left", | |
2047 | "up", | |
2048 | "right", | |
2049 | "down", | |
2050 | "prior", | |
2051 | "next", | |
2052 | "end", | |
2053 | "begin", | |
2054 | 0, /* 0xff59 */ | |
2055 | 0, 0, 0, 0, 0, 0, | |
2056 | "select", /* 0xff60 */ /* IsMiscFunctionKey */ | |
2057 | "print", | |
2058 | "execute", | |
2059 | "insert", | |
2060 | 0, /* 0xff64 */ | |
2061 | "undo", | |
2062 | "redo", | |
2063 | "menu", | |
2064 | "find", | |
2065 | "cancel", | |
2066 | "help", | |
2067 | "break", /* 0xff6b */ | |
2068 | ||
2069 | /* Here are some keys found mostly on HP keyboards. The X event | |
2070 | handling code will strip bit 29, which flags vendor-specific | |
2071 | keysyms. */ | |
2072 | "reset", /* 0x1000ff6c */ | |
2073 | "system", | |
2074 | "user", | |
2075 | "clearline", | |
2076 | "insertline", | |
2077 | "deleteline", | |
2078 | "insertchar", | |
2079 | "deletechar", | |
2080 | "backtab", | |
36ae397e | 2081 | "kp-backtab", /* 0x1000ff75 */ |
284f4730 | 2082 | 0, /* 0xff76 */ |
36ae397e | 2083 | 0, 0, 0, 0, 0, 0, 0, 0, "kp-numlock", /* 0xff7f */ |
284f4730 JB |
2084 | "kp-space", /* 0xff80 */ /* IsKeypadKey */ |
2085 | 0, 0, 0, 0, 0, 0, 0, 0, | |
2086 | "kp-tab", /* 0xff89 */ | |
2087 | 0, 0, 0, | |
2088 | "kp-enter", /* 0xff8d */ | |
2089 | 0, 0, 0, | |
2090 | "kp-f1", /* 0xff91 */ | |
2091 | "kp-f2", | |
2092 | "kp-f3", | |
2093 | "kp-f4", | |
2094 | 0, /* 0xff95 */ | |
2095 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
2096 | "kp-multiply", /* 0xffaa */ | |
2097 | "kp-add", | |
2098 | "kp-separator", | |
2099 | "kp-subtract", | |
2100 | "kp-decimal", | |
2101 | "kp-divide", /* 0xffaf */ | |
2102 | "kp-0", /* 0xffb0 */ | |
2103 | "kp-1", "kp-2", "kp-3", "kp-4", "kp-5", "kp-6", "kp-7", "kp-8", "kp-9", | |
2104 | 0, /* 0xffba */ | |
2105 | 0, 0, | |
2106 | "kp-equal", /* 0xffbd */ | |
2107 | "f1", /* 0xffbe */ /* IsFunctionKey */ | |
86e5706b RS |
2108 | "f2", |
2109 | "f3", "f4", "f5", "f6", "f7", "f8", "f9", "f10", /* 0xffc0 */ | |
2110 | "f11", "f12", "f13", "f14", "f15", "f16", "f17", "f18", | |
2111 | "f19", "f20", "f21", "f22", "f23", "f24", "f25", "f26", /* 0xffd0 */ | |
2112 | "f27", "f28", "f29", "f30", "f31", "f32", "f33", "f34", | |
2113 | "f35", 0, 0, 0, 0, 0, 0, 0, /* 0xffe0 */ | |
2114 | 0, 0, 0, 0, 0, 0, 0, 0, | |
2115 | 0, 0, 0, 0, 0, 0, 0, 0, /* 0xfff0 */ | |
2116 | 0, 0, 0, 0, 0, 0, 0, "delete" | |
284f4730 JB |
2117 | }; |
2118 | ||
2119 | static char *lispy_mouse_names[] = | |
2120 | { | |
2121 | "mouse-1", "mouse-2", "mouse-3", "mouse-4", "mouse-5" | |
2122 | }; | |
2123 | ||
3c370943 | 2124 | /* Scroll bar parts. */ |
4bb994d1 JB |
2125 | Lisp_Object Qabove_handle, Qhandle, Qbelow_handle; |
2126 | ||
3c370943 JB |
2127 | /* An array of scroll bar parts, indexed by an enum scroll_bar_part value. */ |
2128 | Lisp_Object *scroll_bar_parts[] = { | |
4bb994d1 JB |
2129 | &Qabove_handle, &Qhandle, &Qbelow_handle |
2130 | }; | |
2131 | ||
2132 | ||
7b4aedb9 | 2133 | /* A vector, indexed by button number, giving the down-going location |
3c370943 | 2134 | of currently depressed buttons, both scroll bar and non-scroll bar. |
7b4aedb9 JB |
2135 | |
2136 | The elements have the form | |
2137 | (BUTTON-NUMBER MODIFIER-MASK . REST) | |
2138 | where REST is the cdr of a position as it would be reported in the event. | |
2139 | ||
2140 | The make_lispy_event function stores positions here to tell the | |
2141 | difference between click and drag events, and to store the starting | |
2142 | location to be included in drag events. */ | |
2143 | ||
2144 | static Lisp_Object button_down_location; | |
88cb0656 | 2145 | |
284f4730 JB |
2146 | /* Given a struct input_event, build the lisp event which represents |
2147 | it. If EVENT is 0, build a mouse movement event from the mouse | |
88cb0656 JB |
2148 | movement buffer, which should have a movement event in it. |
2149 | ||
2150 | Note that events must be passed to this function in the order they | |
2151 | are received; this function stores the location of button presses | |
2152 | in order to build drag events when the button is released. */ | |
284f4730 JB |
2153 | |
2154 | static Lisp_Object | |
2155 | make_lispy_event (event) | |
2156 | struct input_event *event; | |
2157 | { | |
2158 | #ifdef SWITCH_ENUM_BUG | |
2159 | switch ((int) event->kind) | |
2160 | #else | |
2161 | switch (event->kind) | |
2162 | #endif | |
2163 | { | |
284f4730 JB |
2164 | /* A simple keystroke. */ |
2165 | case ascii_keystroke: | |
86e5706b RS |
2166 | { |
2167 | int c = XFASTINT (event->code); | |
5a1c6df8 JB |
2168 | /* Turn ASCII characters into control characters |
2169 | when proper. */ | |
2170 | if (event->modifiers & ctrl_modifier) | |
d205953b JB |
2171 | c = make_ctrl_char (c); |
2172 | ||
2173 | /* Add in the other modifier bits. We took care of ctrl_modifier | |
2174 | just above, and the shift key was taken care of by the X code, | |
2175 | and applied to control characters by make_ctrl_char. */ | |
86e5706b RS |
2176 | c |= (event->modifiers |
2177 | & (meta_modifier | alt_modifier | |
2178 | | hyper_modifier | super_modifier)); | |
2179 | return c; | |
2180 | } | |
284f4730 JB |
2181 | |
2182 | /* A function key. The symbol may need to have modifier prefixes | |
2183 | tacked onto it. */ | |
2184 | case non_ascii_keystroke: | |
2185 | return modify_event_symbol (XFASTINT (event->code), event->modifiers, | |
2186 | Qfunction_key, | |
2187 | lispy_function_keys, &func_key_syms, | |
2188 | (sizeof (lispy_function_keys) | |
2189 | / sizeof (lispy_function_keys[0]))); | |
2190 | break; | |
2191 | ||
88cb0656 JB |
2192 | /* A mouse click. Figure out where it is, decide whether it's |
2193 | a press, click or drag, and build the appropriate structure. */ | |
284f4730 | 2194 | case mouse_click: |
3c370943 | 2195 | case scroll_bar_click: |
284f4730 | 2196 | { |
0a7f1fc0 | 2197 | int button = XFASTINT (event->code); |
7b4aedb9 | 2198 | Lisp_Object position; |
dbc4e1c1 JB |
2199 | Lisp_Object *start_pos_ptr; |
2200 | Lisp_Object start_pos; | |
284f4730 | 2201 | |
7b4aedb9 | 2202 | if (button < 0 || button >= NUM_MOUSE_BUTTONS) |
88cb0656 JB |
2203 | abort (); |
2204 | ||
7b4aedb9 JB |
2205 | /* Build the position as appropriate for this mouse click. */ |
2206 | if (event->kind == mouse_click) | |
284f4730 | 2207 | { |
7b4aedb9 | 2208 | int part; |
598a9fa7 | 2209 | FRAME_PTR f = XFRAME (event->frame_or_window); |
5ec75a55 RS |
2210 | Lisp_Object window |
2211 | = window_from_coordinates (f, XINT (event->x), XINT (event->y), | |
2212 | &part); | |
7b4aedb9 JB |
2213 | Lisp_Object posn; |
2214 | ||
5ec75a55 RS |
2215 | if (XINT (event->y) < FRAME_MENU_BAR_LINES (f)) |
2216 | { | |
2217 | int hpos; | |
2218 | Lisp_Object items; | |
2219 | items = FRAME_MENU_BAR_ITEMS (f); | |
2220 | for (; CONSP (items); items = XCONS (items)->cdr) | |
2221 | { | |
2222 | Lisp_Object pos, string; | |
2223 | pos = Fcdr (Fcdr (Fcar (items))); | |
2224 | string = Fcar (Fcdr (Fcar (items))); | |
0a9b0670 RS |
2225 | if (XINT (event->x) >= XINT (pos) |
2226 | && XINT (event->x) < XINT (pos) + XSTRING (string)->size) | |
5ec75a55 RS |
2227 | break; |
2228 | } | |
2229 | position | |
2230 | = Fcons (event->frame_or_window, | |
2231 | Fcons (Qmenu_bar, | |
2232 | Fcons (Fcons (event->x, event->y), | |
2233 | Fcons (make_number (event->timestamp), | |
2234 | Qnil)))); | |
2235 | ||
2236 | if (CONSP (items)) | |
2237 | return Fcons (Fcar (Fcar (items)), | |
2238 | Fcons (position, Qnil)); | |
2239 | else | |
2240 | return Fcons (Qnil, Fcons (position, Qnil)); | |
2241 | } | |
2242 | else if (XTYPE (window) != Lisp_Window) | |
7b4aedb9 | 2243 | posn = Qnil; |
284f4730 | 2244 | else |
7b4aedb9 | 2245 | { |
dbc4e1c1 JB |
2246 | XSETINT (event->x, |
2247 | (XINT (event->x) - XINT (XWINDOW (window)->left))); | |
2248 | XSETINT (event->y, | |
2249 | (XINT (event->y) - XINT (XWINDOW (window)->top))); | |
2250 | ||
7b4aedb9 JB |
2251 | if (part == 1) |
2252 | posn = Qmode_line; | |
2253 | else if (part == 2) | |
2254 | posn = Qvertical_line; | |
2255 | else | |
dbc4e1c1 JB |
2256 | XSET (posn, Lisp_Int, |
2257 | buffer_posn_from_coords (XWINDOW (window), | |
2258 | XINT (event->x), | |
2259 | XINT (event->y))); | |
7b4aedb9 JB |
2260 | } |
2261 | ||
5ec75a55 RS |
2262 | position |
2263 | = Fcons (window, | |
2264 | Fcons (posn, | |
2265 | Fcons (Fcons (event->x, event->y), | |
2266 | Fcons (make_number (event->timestamp), | |
2267 | Qnil)))); | |
284f4730 | 2268 | } |
7b4aedb9 | 2269 | else |
88cb0656 | 2270 | { |
7b4aedb9 JB |
2271 | Lisp_Object window = event->frame_or_window; |
2272 | Lisp_Object portion_whole = Fcons (event->x, event->y); | |
3c370943 | 2273 | Lisp_Object part = *scroll_bar_parts[(int) event->part]; |
7b4aedb9 JB |
2274 | |
2275 | position = | |
2276 | Fcons (window, | |
3c370943 | 2277 | Fcons (Qvertical_scroll_bar, |
7b4aedb9 JB |
2278 | Fcons (portion_whole, |
2279 | Fcons (make_number (event->timestamp), | |
2280 | Fcons (part, | |
2281 | Qnil))))); | |
88cb0656 JB |
2282 | } |
2283 | ||
dbc4e1c1 JB |
2284 | start_pos_ptr = &XVECTOR (button_down_location)->contents[button]; |
2285 | ||
2286 | start_pos = *start_pos_ptr; | |
2287 | *start_pos_ptr = Qnil; | |
7b4aedb9 JB |
2288 | |
2289 | /* If this is a button press, squirrel away the location, so | |
2290 | we can decide later whether it was a click or a drag. */ | |
2291 | if (event->modifiers & down_modifier) | |
dbc4e1c1 | 2292 | *start_pos_ptr = Fcopy_alist (position); |
7b4aedb9 | 2293 | |
88cb0656 | 2294 | /* Now we're releasing a button - check the co-ordinates to |
7b4aedb9 | 2295 | see if this was a click or a drag. */ |
88cb0656 JB |
2296 | else if (event->modifiers & up_modifier) |
2297 | { | |
48e416d4 RS |
2298 | /* If we did not see a down before this up, |
2299 | ignore the up. Probably this happened because | |
2300 | the down event chose a menu item. | |
2301 | It would be an annoyance to treat the release | |
2302 | of the button that chose the menu item | |
2303 | as a separate event. */ | |
2304 | ||
2305 | if (XTYPE (start_pos) != Lisp_Cons) | |
2306 | return Qnil; | |
2307 | ||
88cb0656 | 2308 | event->modifiers &= ~up_modifier; |
48e416d4 | 2309 | #if 0 /* Formerly we treated an up with no down as a click event. */ |
dbc4e1c1 JB |
2310 | if (XTYPE (start_pos) != Lisp_Cons) |
2311 | event->modifiers |= click_modifier; | |
2312 | else | |
48e416d4 | 2313 | #endif |
dbc4e1c1 JB |
2314 | { |
2315 | /* The third element of every position should be the (x,y) | |
2316 | pair. */ | |
2317 | Lisp_Object down = Fnth (make_number (2), start_pos); | |
2318 | ||
2319 | event->modifiers |= ((EQ (event->x, XCONS (down)->car) | |
2320 | && EQ (event->y, XCONS (down)->cdr)) | |
2321 | ? click_modifier | |
2322 | : drag_modifier); | |
2323 | } | |
88cb0656 JB |
2324 | } |
2325 | else | |
2326 | /* Every mouse event should either have the down_modifier or | |
7b4aedb9 | 2327 | the up_modifier set. */ |
88cb0656 JB |
2328 | abort (); |
2329 | ||
88cb0656 | 2330 | { |
7b4aedb9 | 2331 | /* Get the symbol we should use for the mouse click. */ |
5ec75a55 RS |
2332 | Lisp_Object head |
2333 | = modify_event_symbol (button, | |
2334 | event->modifiers, | |
2335 | Qmouse_click, | |
2336 | lispy_mouse_names, &mouse_syms, | |
2337 | (sizeof (lispy_mouse_names) | |
2338 | / sizeof (lispy_mouse_names[0]))); | |
7b4aedb9 | 2339 | |
88cb0656 | 2340 | if (event->modifiers & drag_modifier) |
dbc4e1c1 JB |
2341 | return Fcons (head, |
2342 | Fcons (start_pos, | |
2343 | Fcons (position, | |
2344 | Qnil))); | |
88cb0656 JB |
2345 | else |
2346 | return Fcons (head, | |
7b4aedb9 | 2347 | Fcons (position, |
88cb0656 JB |
2348 | Qnil)); |
2349 | } | |
284f4730 JB |
2350 | } |
2351 | ||
284f4730 JB |
2352 | /* The 'kind' field of the event is something we don't recognize. */ |
2353 | default: | |
48e416d4 | 2354 | abort (); |
284f4730 JB |
2355 | } |
2356 | } | |
2357 | ||
2358 | static Lisp_Object | |
7b4aedb9 | 2359 | make_lispy_movement (frame, bar_window, part, x, y, time) |
ff11dfa1 | 2360 | FRAME_PTR frame; |
7b4aedb9 | 2361 | Lisp_Object bar_window; |
3c370943 | 2362 | enum scroll_bar_part part; |
284f4730 | 2363 | Lisp_Object x, y; |
e5d77022 | 2364 | unsigned long time; |
284f4730 | 2365 | { |
3c370943 | 2366 | /* Is it a scroll bar movement? */ |
7b4aedb9 | 2367 | if (frame && ! NILP (bar_window)) |
4bb994d1 | 2368 | { |
3c370943 | 2369 | Lisp_Object part_sym = *scroll_bar_parts[(int) part]; |
4bb994d1 | 2370 | |
3c370943 | 2371 | return Fcons (Qscroll_bar_movement, |
7b4aedb9 | 2372 | (Fcons (Fcons (bar_window, |
3c370943 | 2373 | Fcons (Qvertical_scroll_bar, |
4bb994d1 JB |
2374 | Fcons (Fcons (x, y), |
2375 | Fcons (make_number (time), | |
cb5df6ae | 2376 | Fcons (part_sym, |
4bb994d1 JB |
2377 | Qnil))))), |
2378 | Qnil))); | |
2379 | } | |
2380 | ||
2381 | /* Or is it an ordinary mouse movement? */ | |
284f4730 JB |
2382 | else |
2383 | { | |
4bb994d1 JB |
2384 | int area; |
2385 | Lisp_Object window = | |
2386 | (frame | |
2387 | ? window_from_coordinates (frame, XINT (x), XINT (y), &area) | |
2388 | : Qnil); | |
2389 | Lisp_Object posn; | |
2390 | ||
2391 | if (XTYPE (window) == Lisp_Window) | |
2392 | { | |
2393 | XSETINT (x, XINT (x) - XINT (XWINDOW (window)->left)); | |
2394 | XSETINT (y, XINT (y) - XINT (XWINDOW (window)->top)); | |
2395 | ||
2396 | if (area == 1) | |
2397 | posn = Qmode_line; | |
2398 | else if (area == 2) | |
2399 | posn = Qvertical_line; | |
2400 | else | |
2401 | XSET (posn, Lisp_Int, | |
2402 | buffer_posn_from_coords (XWINDOW (window), | |
2403 | XINT (x), XINT (y))); | |
2404 | } | |
284f4730 | 2405 | else |
4bb994d1 JB |
2406 | { |
2407 | window = Qnil; | |
2408 | posn = Qnil; | |
f76b81d6 JB |
2409 | XFASTINT (x) = 0; |
2410 | XFASTINT (y) = 0; | |
4bb994d1 | 2411 | } |
284f4730 | 2412 | |
4bb994d1 JB |
2413 | return Fcons (Qmouse_movement, |
2414 | Fcons (Fcons (window, | |
2415 | Fcons (posn, | |
2416 | Fcons (Fcons (x, y), | |
2417 | Fcons (make_number (time), | |
2418 | Qnil)))), | |
2419 | Qnil)); | |
2420 | } | |
284f4730 JB |
2421 | } |
2422 | ||
cd21b839 JB |
2423 | /* Construct a switch frame event. */ |
2424 | static Lisp_Object | |
2425 | make_lispy_switch_frame (frame) | |
2426 | Lisp_Object frame; | |
2427 | { | |
2428 | return Fcons (Qswitch_frame, Fcons (frame, Qnil)); | |
2429 | } | |
0a7f1fc0 JB |
2430 | \f |
2431 | /* Manipulating modifiers. */ | |
284f4730 | 2432 | |
0a7f1fc0 | 2433 | /* Parse the name of SYMBOL, and return the set of modifiers it contains. |
284f4730 | 2434 | |
0a7f1fc0 JB |
2435 | If MODIFIER_END is non-zero, set *MODIFIER_END to the position in |
2436 | SYMBOL's name of the end of the modifiers; the string from this | |
2437 | position is the unmodified symbol name. | |
284f4730 | 2438 | |
0a7f1fc0 JB |
2439 | This doesn't use any caches. */ |
2440 | static int | |
2441 | parse_modifiers_uncached (symbol, modifier_end) | |
284f4730 | 2442 | Lisp_Object symbol; |
0a7f1fc0 | 2443 | int *modifier_end; |
284f4730 JB |
2444 | { |
2445 | struct Lisp_String *name; | |
2446 | int i; | |
2447 | int modifiers; | |
284f4730 JB |
2448 | |
2449 | CHECK_SYMBOL (symbol, 1); | |
2450 | ||
2451 | modifiers = 0; | |
2452 | name = XSYMBOL (symbol)->name; | |
2453 | ||
284f4730 | 2454 | |
0a7f1fc0 | 2455 | for (i = 0; i+2 <= name->size; ) |
284f4730 JB |
2456 | switch (name->data[i]) |
2457 | { | |
0a7f1fc0 JB |
2458 | #define SINGLE_LETTER_MOD(bit) \ |
2459 | if (name->data[i+1] != '-') \ | |
2460 | goto no_more_modifiers; \ | |
2461 | modifiers |= bit; \ | |
fce33686 | 2462 | i += 2; |
0a7f1fc0 JB |
2463 | |
2464 | case 'A': | |
2465 | SINGLE_LETTER_MOD (alt_modifier); | |
284f4730 JB |
2466 | break; |
2467 | ||
2468 | case 'C': | |
0a7f1fc0 | 2469 | SINGLE_LETTER_MOD (ctrl_modifier); |
fce33686 JB |
2470 | break; |
2471 | ||
2472 | case 'H': | |
0a7f1fc0 | 2473 | SINGLE_LETTER_MOD (hyper_modifier); |
fce33686 JB |
2474 | break; |
2475 | ||
2476 | case 'M': | |
0a7f1fc0 | 2477 | SINGLE_LETTER_MOD (meta_modifier); |
284f4730 JB |
2478 | break; |
2479 | ||
2480 | case 'S': | |
0a7f1fc0 | 2481 | SINGLE_LETTER_MOD (shift_modifier); |
fce33686 JB |
2482 | break; |
2483 | ||
2484 | case 's': | |
86e5706b | 2485 | SINGLE_LETTER_MOD (super_modifier); |
284f4730 JB |
2486 | break; |
2487 | ||
fce33686 JB |
2488 | case 'd': |
2489 | if (i + 5 > name->size) | |
2490 | goto no_more_modifiers; | |
2491 | if (! strncmp (name->data + i, "drag-", 5)) | |
2492 | { | |
fce33686 JB |
2493 | modifiers |= drag_modifier; |
2494 | i += 5; | |
2495 | } | |
2496 | else if (! strncmp (name->data + i, "down-", 5)) | |
2497 | { | |
fce33686 JB |
2498 | modifiers |= down_modifier; |
2499 | i += 5; | |
2500 | } | |
2501 | else | |
2502 | goto no_more_modifiers; | |
284f4730 JB |
2503 | break; |
2504 | ||
2505 | default: | |
2506 | goto no_more_modifiers; | |
0a7f1fc0 JB |
2507 | |
2508 | #undef SINGLE_LETTER_MOD | |
284f4730 JB |
2509 | } |
2510 | no_more_modifiers: | |
2511 | ||
0a7f1fc0 JB |
2512 | /* Should we include the `click' modifier? */ |
2513 | if (! (modifiers & (down_modifier | drag_modifier)) | |
2514 | && i + 7 == name->size | |
4bb994d1 | 2515 | && strncmp (name->data + i, "mouse-", 6) == 0 |
6569cc8d | 2516 | && ('0' <= name->data[i + 6] && name->data[i + 6] <= '9')) |
0a7f1fc0 JB |
2517 | modifiers |= click_modifier; |
2518 | ||
2519 | if (modifier_end) | |
2520 | *modifier_end = i; | |
2521 | ||
2522 | return modifiers; | |
2523 | } | |
2524 | ||
2525 | ||
2526 | /* Return a symbol whose name is the modifier prefixes for MODIFIERS | |
2527 | prepended to the string BASE[0..BASE_LEN-1]. | |
2528 | This doesn't use any caches. */ | |
2529 | static Lisp_Object | |
2530 | apply_modifiers_uncached (modifiers, base, base_len) | |
2531 | int modifiers; | |
2532 | char *base; | |
2533 | int base_len; | |
2534 | { | |
2535 | /* Since BASE could contain nulls, we can't use intern here; we have | |
2536 | to use Fintern, which expects a genuine Lisp_String, and keeps a | |
2537 | reference to it. */ | |
2538 | char *new_mods = | |
86e5706b | 2539 | (char *) alloca (sizeof ("A-C-H-M-S-s-down-drag-")); |
0a7f1fc0 | 2540 | int mod_len; |
284f4730 | 2541 | |
284f4730 | 2542 | { |
0a7f1fc0 JB |
2543 | char *p = new_mods; |
2544 | ||
2545 | /* Only the event queue may use the `up' modifier; it should always | |
2546 | be turned into a click or drag event before presented to lisp code. */ | |
2547 | if (modifiers & up_modifier) | |
2548 | abort (); | |
2549 | ||
2550 | if (modifiers & alt_modifier) { *p++ = 'A'; *p++ = '-'; } | |
2551 | if (modifiers & ctrl_modifier) { *p++ = 'C'; *p++ = '-'; } | |
2552 | if (modifiers & hyper_modifier) { *p++ = 'H'; *p++ = '-'; } | |
2553 | if (modifiers & meta_modifier) { *p++ = 'M'; *p++ = '-'; } | |
2554 | if (modifiers & shift_modifier) { *p++ = 'S'; *p++ = '-'; } | |
86e5706b | 2555 | if (modifiers & super_modifier) { *p++ = 's'; *p++ = '-'; } |
0a7f1fc0 JB |
2556 | if (modifiers & down_modifier) { strcpy (p, "down-"); p += 5; } |
2557 | if (modifiers & drag_modifier) { strcpy (p, "drag-"); p += 5; } | |
2558 | /* The click modifier is denoted by the absence of other modifiers. */ | |
2559 | ||
2560 | *p = '\0'; | |
2561 | ||
2562 | mod_len = p - new_mods; | |
2563 | } | |
284f4730 | 2564 | |
0a7f1fc0 JB |
2565 | { |
2566 | Lisp_Object new_name = make_uninit_string (mod_len + base_len); | |
2567 | ||
2568 | bcopy (new_mods, XSTRING (new_name)->data, mod_len); | |
2569 | bcopy (base, XSTRING (new_name)->data + mod_len, base_len); | |
284f4730 JB |
2570 | |
2571 | return Fintern (new_name, Qnil); | |
2572 | } | |
2573 | } | |
2574 | ||
2575 | ||
0a7f1fc0 JB |
2576 | static char *modifier_names[] = |
2577 | { | |
1dfdf9e2 RS |
2578 | "up", "down", "drag", "click", 0, 0, 0, 0, |
2579 | 0, 0, 0, 0, 0, 0, 0, 0, | |
86e5706b | 2580 | 0, 0, "alt", "super", "hyper", "shift", "control", "meta" |
0a7f1fc0 | 2581 | }; |
80645119 | 2582 | #define NUM_MOD_NAMES (sizeof (modifier_names) / sizeof (modifier_names[0])) |
0a7f1fc0 JB |
2583 | |
2584 | static Lisp_Object modifier_symbols; | |
2585 | ||
2586 | /* Return the list of modifier symbols corresponding to the mask MODIFIERS. */ | |
2587 | static Lisp_Object | |
2588 | lispy_modifier_list (modifiers) | |
2589 | int modifiers; | |
2590 | { | |
2591 | Lisp_Object modifier_list; | |
2592 | int i; | |
2593 | ||
2594 | modifier_list = Qnil; | |
80645119 | 2595 | for (i = 0; (1<<i) <= modifiers && i < NUM_MOD_NAMES; i++) |
0a7f1fc0 | 2596 | if (modifiers & (1<<i)) |
80645119 JB |
2597 | modifier_list = Fcons (XVECTOR (modifier_symbols)->contents[i], |
2598 | modifier_list); | |
0a7f1fc0 JB |
2599 | |
2600 | return modifier_list; | |
2601 | } | |
2602 | ||
2603 | ||
2604 | /* Parse the modifiers on SYMBOL, and return a list like (UNMODIFIED MASK), | |
2605 | where UNMODIFIED is the unmodified form of SYMBOL, | |
2606 | MASK is the set of modifiers present in SYMBOL's name. | |
2607 | This is similar to parse_modifiers_uncached, but uses the cache in | |
2608 | SYMBOL's Qevent_symbol_element_mask property, and maintains the | |
2609 | Qevent_symbol_elements property. */ | |
2610 | static Lisp_Object | |
2611 | parse_modifiers (symbol) | |
2612 | Lisp_Object symbol; | |
2613 | { | |
2614 | Lisp_Object elements = Fget (symbol, Qevent_symbol_element_mask); | |
2615 | ||
2616 | if (CONSP (elements)) | |
2617 | return elements; | |
2618 | else | |
2619 | { | |
2620 | int end; | |
2621 | int modifiers = parse_modifiers_uncached (symbol, &end); | |
2622 | Lisp_Object unmodified | |
2623 | = Fintern (make_string (XSYMBOL (symbol)->name->data + end, | |
2624 | XSYMBOL (symbol)->name->size - end), | |
2625 | Qnil); | |
2626 | Lisp_Object mask; | |
2627 | ||
734fef94 JB |
2628 | if (modifiers & ~((1<<VALBITS) - 1)) |
2629 | abort (); | |
0a7f1fc0 JB |
2630 | XFASTINT (mask) = modifiers; |
2631 | elements = Fcons (unmodified, Fcons (mask, Qnil)); | |
2632 | ||
2633 | /* Cache the parsing results on SYMBOL. */ | |
2634 | Fput (symbol, Qevent_symbol_element_mask, | |
2635 | elements); | |
2636 | Fput (symbol, Qevent_symbol_elements, | |
2637 | Fcons (unmodified, lispy_modifier_list (modifiers))); | |
2638 | ||
2639 | /* Since we know that SYMBOL is modifiers applied to unmodified, | |
2640 | it would be nice to put that in unmodified's cache. | |
2641 | But we can't, since we're not sure that parse_modifiers is | |
2642 | canonical. */ | |
2643 | ||
2644 | return elements; | |
2645 | } | |
2646 | } | |
2647 | ||
2648 | /* Apply the modifiers MODIFIERS to the symbol BASE. | |
2649 | BASE must be unmodified. | |
2650 | ||
2651 | This is like apply_modifiers_uncached, but uses BASE's | |
2652 | Qmodifier_cache property, if present. It also builds | |
cd21b839 JB |
2653 | Qevent_symbol_elements properties, since it has that info anyway. |
2654 | ||
2655 | apply_modifiers copies the value of BASE's Qevent_kind property to | |
2656 | the modified symbol. */ | |
0a7f1fc0 JB |
2657 | static Lisp_Object |
2658 | apply_modifiers (modifiers, base) | |
2659 | int modifiers; | |
2660 | Lisp_Object base; | |
2661 | { | |
7b4aedb9 | 2662 | Lisp_Object cache, index, entry, new_symbol; |
0a7f1fc0 | 2663 | |
80645119 JB |
2664 | /* Mask out upper bits. We don't know where this value's been. */ |
2665 | modifiers &= (1<<VALBITS) - 1; | |
2666 | ||
0a7f1fc0 | 2667 | /* The click modifier never figures into cache indices. */ |
0a7f1fc0 | 2668 | cache = Fget (base, Qmodifier_cache); |
cd21b839 | 2669 | XFASTINT (index) = (modifiers & ~click_modifier); |
0a7f1fc0 JB |
2670 | entry = Fassq (index, cache); |
2671 | ||
2672 | if (CONSP (entry)) | |
7b4aedb9 JB |
2673 | new_symbol = XCONS (entry)->cdr; |
2674 | else | |
2675 | { | |
2676 | /* We have to create the symbol ourselves. */ | |
2677 | new_symbol = apply_modifiers_uncached (modifiers, | |
2678 | XSYMBOL (base)->name->data, | |
2679 | XSYMBOL (base)->name->size); | |
2680 | ||
2681 | /* Add the new symbol to the base's cache. */ | |
2682 | entry = Fcons (index, new_symbol); | |
2683 | Fput (base, Qmodifier_cache, Fcons (entry, cache)); | |
2684 | ||
2685 | /* We have the parsing info now for free, so add it to the caches. */ | |
2686 | XFASTINT (index) = modifiers; | |
2687 | Fput (new_symbol, Qevent_symbol_element_mask, | |
2688 | Fcons (base, Fcons (index, Qnil))); | |
2689 | Fput (new_symbol, Qevent_symbol_elements, | |
2690 | Fcons (base, lispy_modifier_list (modifiers))); | |
2691 | } | |
0a7f1fc0 | 2692 | |
7b4aedb9 JB |
2693 | /* Make sure this symbol is of the same kind as BASE. |
2694 | ||
2695 | You'd think we could just set this once and for all when we | |
2696 | intern the symbol above, but reorder_modifiers may call us when | |
2697 | BASE's property isn't set right; we can't assume that just | |
80645119 JB |
2698 | because it has a Qmodifier_cache property it must have its |
2699 | Qevent_kind set right as well. */ | |
7b4aedb9 JB |
2700 | if (NILP (Fget (new_symbol, Qevent_kind))) |
2701 | { | |
2702 | Lisp_Object kind = Fget (base, Qevent_kind); | |
2703 | ||
2704 | if (! NILP (kind)) | |
2705 | Fput (new_symbol, Qevent_kind, kind); | |
2706 | } | |
2707 | ||
2708 | return new_symbol; | |
0a7f1fc0 JB |
2709 | } |
2710 | ||
2711 | ||
2712 | /* Given a symbol whose name begins with modifiers ("C-", "M-", etc), | |
2713 | return a symbol with the modifiers placed in the canonical order. | |
2714 | Canonical order is alphabetical, except for down and drag, which | |
2715 | always come last. The 'click' modifier is never written out. | |
2716 | ||
2717 | Fdefine_key calls this to make sure that (for example) C-M-foo | |
2718 | and M-C-foo end up being equivalent in the keymap. */ | |
2719 | ||
2720 | Lisp_Object | |
2721 | reorder_modifiers (symbol) | |
2722 | Lisp_Object symbol; | |
2723 | { | |
2724 | /* It's hopefully okay to write the code this way, since everything | |
2725 | will soon be in caches, and no consing will be done at all. */ | |
2726 | Lisp_Object parsed = parse_modifiers (symbol); | |
2727 | ||
2728 | return apply_modifiers (XCONS (XCONS (parsed)->cdr)->car, | |
2729 | XCONS (parsed)->car); | |
2730 | } | |
2731 | ||
2732 | ||
284f4730 JB |
2733 | /* For handling events, we often want to produce a symbol whose name |
2734 | is a series of modifier key prefixes ("M-", "C-", etcetera) attached | |
2735 | to some base, like the name of a function key or mouse button. | |
2736 | modify_event_symbol produces symbols of this sort. | |
2737 | ||
2738 | NAME_TABLE should point to an array of strings, such that NAME_TABLE[i] | |
2739 | is the name of the i'th symbol. TABLE_SIZE is the number of elements | |
2740 | in the table. | |
2741 | ||
2742 | SYMBOL_TABLE should be a pointer to a Lisp_Object whose value will | |
2743 | persist between calls to modify_event_symbol that it can use to | |
2744 | store a cache of the symbols it's generated for this NAME_TABLE | |
2745 | before. | |
2746 | ||
2747 | SYMBOL_NUM is the number of the base name we want from NAME_TABLE. | |
2748 | ||
2749 | MODIFIERS is a set of modifier bits (as given in struct input_events) | |
2750 | whose prefixes should be applied to the symbol name. | |
2751 | ||
2752 | SYMBOL_KIND is the value to be placed in the event_kind property of | |
88cb0656 JB |
2753 | the returned symbol. |
2754 | ||
2755 | The symbols we create are supposed to have an | |
eb8c3be9 | 2756 | `event-symbol-elements' property, which lists the modifiers present |
88cb0656 JB |
2757 | in the symbol's name. */ |
2758 | ||
284f4730 JB |
2759 | static Lisp_Object |
2760 | modify_event_symbol (symbol_num, modifiers, symbol_kind, name_table, | |
2761 | symbol_table, table_size) | |
2762 | int symbol_num; | |
2763 | unsigned modifiers; | |
2764 | Lisp_Object symbol_kind; | |
2765 | char **name_table; | |
2766 | Lisp_Object *symbol_table; | |
2767 | int table_size; | |
2768 | { | |
88cb0656 | 2769 | Lisp_Object *slot; |
284f4730 JB |
2770 | |
2771 | /* Is this a request for a valid symbol? */ | |
88cb0656 | 2772 | if (symbol_num < 0 || symbol_num >= table_size) |
284f4730 JB |
2773 | abort (); |
2774 | ||
0a7f1fc0 | 2775 | /* If *symbol_table doesn't seem to be initialized properly, fix that. |
88cb0656 | 2776 | *symbol_table should be a lisp vector TABLE_SIZE elements long, |
4bb994d1 JB |
2777 | where the Nth element is the symbol for NAME_TABLE[N], or nil if |
2778 | we've never used that symbol before. */ | |
284f4730 JB |
2779 | if (XTYPE (*symbol_table) != Lisp_Vector |
2780 | || XVECTOR (*symbol_table)->size != table_size) | |
88cb0656 | 2781 | { |
0a7f1fc0 JB |
2782 | Lisp_Object size; |
2783 | ||
2784 | XFASTINT (size) = table_size; | |
2785 | *symbol_table = Fmake_vector (size, Qnil); | |
88cb0656 | 2786 | } |
284f4730 | 2787 | |
88cb0656 | 2788 | slot = & XVECTOR (*symbol_table)->contents[symbol_num]; |
284f4730 | 2789 | |
0a7f1fc0 JB |
2790 | /* Have we already used this symbol before? */ |
2791 | if (NILP (*slot)) | |
284f4730 | 2792 | { |
0a7f1fc0 | 2793 | /* No; let's create it. */ |
d1f50460 RS |
2794 | if (name_table[symbol_num]) |
2795 | *slot = intern (name_table[symbol_num]); | |
2796 | else | |
2797 | { | |
2798 | char buf[20]; | |
2799 | sprintf (buf, "key-%d", symbol_num); | |
2800 | *slot = intern (buf); | |
2801 | } | |
0a7f1fc0 JB |
2802 | |
2803 | /* Fill in the cache entries for this symbol; this also | |
2804 | builds the Qevent_symbol_elements property, which the user | |
2805 | cares about. */ | |
6569cc8d | 2806 | apply_modifiers (modifiers & click_modifier, *slot); |
0a7f1fc0 | 2807 | Fput (*slot, Qevent_kind, symbol_kind); |
284f4730 | 2808 | } |
88cb0656 | 2809 | |
0a7f1fc0 JB |
2810 | /* Apply modifiers to that symbol. */ |
2811 | return apply_modifiers (modifiers, *slot); | |
284f4730 | 2812 | } |
0a7f1fc0 | 2813 | |
284f4730 | 2814 | \f |
284f4730 JB |
2815 | /* Store into *addr a value nonzero if terminal input chars are available. |
2816 | Serves the purpose of ioctl (0, FIONREAD, addr) | |
2817 | but works even if FIONREAD does not exist. | |
2818 | (In fact, this may actually read some input.) */ | |
2819 | ||
2820 | static void | |
2821 | get_input_pending (addr) | |
2822 | int *addr; | |
2823 | { | |
2824 | /* First of all, have we already counted some input? */ | |
2825 | *addr = !NILP (Vquit_flag) || readable_events (); | |
2826 | ||
2827 | /* If input is being read as it arrives, and we have none, there is none. */ | |
2828 | if (*addr > 0 || (interrupt_input && ! interrupts_deferred)) | |
2829 | return; | |
2830 | ||
2831 | /* Try to read some input and see how much we get. */ | |
2832 | gobble_input (0); | |
2833 | *addr = !NILP (Vquit_flag) || readable_events (); | |
2834 | } | |
2835 | ||
2836 | /* Interface to read_avail_input, blocking SIGIO if necessary. */ | |
2837 | ||
2838 | int | |
2839 | gobble_input (expected) | |
2840 | int expected; | |
2841 | { | |
2842 | #ifndef VMS | |
2843 | #ifdef SIGIO | |
2844 | if (interrupt_input) | |
2845 | { | |
32676c08 | 2846 | SIGMASKTYPE mask; |
e065a56e | 2847 | mask = sigblockx (SIGIO); |
284f4730 | 2848 | read_avail_input (expected); |
e065a56e | 2849 | sigsetmask (mask); |
284f4730 JB |
2850 | } |
2851 | else | |
2852 | #endif | |
2853 | read_avail_input (expected); | |
2854 | #endif | |
2855 | } | |
2856 | \f | |
2857 | #ifndef VMS | |
2858 | ||
2859 | /* Read any terminal input already buffered up by the system | |
2860 | into the kbd_buffer, but do not wait. | |
2861 | ||
2862 | EXPECTED should be nonzero if the caller knows there is some input. | |
2863 | ||
2864 | Except on VMS, all input is read by this function. | |
2865 | If interrupt_input is nonzero, this function MUST be called | |
2866 | only when SIGIO is blocked. | |
2867 | ||
2868 | Returns the number of keyboard chars read, or -1 meaning | |
2869 | this is a bad time to try to read input. */ | |
2870 | ||
2871 | static int | |
2872 | read_avail_input (expected) | |
2873 | int expected; | |
2874 | { | |
2875 | struct input_event buf[KBD_BUFFER_SIZE]; | |
2876 | register int i; | |
2877 | int nread; | |
2878 | ||
2879 | if (read_socket_hook) | |
2880 | /* No need for FIONREAD or fcntl; just say don't wait. */ | |
2881 | nread = (*read_socket_hook) (0, buf, KBD_BUFFER_SIZE, expected, expected); | |
2882 | else | |
2883 | { | |
2884 | unsigned char cbuf[KBD_BUFFER_SIZE]; | |
2885 | ||
2886 | #ifdef FIONREAD | |
2887 | /* Find out how much input is available. */ | |
2888 | if (ioctl (0, FIONREAD, &nread) < 0) | |
2889 | /* Formerly simply reported no input, but that sometimes led to | |
2890 | a failure of Emacs to terminate. | |
2891 | SIGHUP seems appropriate if we can't reach the terminal. */ | |
e4535288 RS |
2892 | /* ??? Is it really right to send the signal just to this process |
2893 | rather than to the whole process group? | |
2894 | Perhaps on systems with FIONREAD Emacs is alone in its group. */ | |
284f4730 JB |
2895 | kill (getpid (), SIGHUP); |
2896 | if (nread == 0) | |
2897 | return 0; | |
2898 | if (nread > sizeof cbuf) | |
2899 | nread = sizeof cbuf; | |
2900 | #else /* no FIONREAD */ | |
2901 | #ifdef USG | |
2902 | /* Read some input if available, but don't wait. */ | |
2903 | nread = sizeof cbuf; | |
2904 | fcntl (fileno (stdin), F_SETFL, O_NDELAY); | |
2905 | #else | |
2906 | you lose; | |
2907 | #endif | |
2908 | #endif | |
2909 | ||
2910 | /* Now read; for one reason or another, this will not block. */ | |
2911 | while (1) | |
2912 | { | |
2913 | nread = read (fileno (stdin), cbuf, nread); | |
2914 | #ifdef AIX | |
2915 | /* The kernel sometimes fails to deliver SIGHUP for ptys. | |
2916 | This looks incorrect, but it isn't, because _BSD causes | |
2917 | O_NDELAY to be defined in fcntl.h as O_NONBLOCK, | |
2918 | and that causes a value other than 0 when there is no input. */ | |
2919 | if (nread == 0) | |
2920 | kill (SIGHUP, 0); | |
2921 | #endif | |
2922 | /* Retry the read if it is interrupted. */ | |
2923 | if (nread >= 0 | |
2924 | || ! (errno == EAGAIN || errno == EFAULT | |
2925 | #ifdef EBADSLT | |
2926 | || errno == EBADSLT | |
2927 | #endif | |
2928 | )) | |
2929 | break; | |
2930 | } | |
2931 | ||
2932 | #ifndef FIONREAD | |
2933 | #ifdef USG | |
2934 | fcntl (fileno (stdin), F_SETFL, 0); | |
2935 | #endif /* USG */ | |
2936 | #endif /* no FIONREAD */ | |
2937 | for (i = 0; i < nread; i++) | |
2938 | { | |
2939 | buf[i].kind = ascii_keystroke; | |
86e5706b | 2940 | buf[i].modifiers = 0; |
b04904fb | 2941 | if (meta_key == 1 && (cbuf[i] & 0x80)) |
86e5706b | 2942 | buf[i].modifiers = meta_modifier; |
b04904fb RS |
2943 | if (meta_key != 2) |
2944 | cbuf[i] &= ~0x80; | |
86e5706b | 2945 | |
7b4aedb9 JB |
2946 | XSET (buf[i].code, Lisp_Int, cbuf[i]); |
2947 | #ifdef MULTI_FRAME | |
2948 | XSET (buf[i].frame_or_window, Lisp_Frame, selected_frame); | |
2949 | #else | |
2950 | buf[i].frame_or_window = Qnil; | |
2951 | #endif | |
284f4730 JB |
2952 | } |
2953 | } | |
2954 | ||
2955 | /* Scan the chars for C-g and store them in kbd_buffer. */ | |
2956 | for (i = 0; i < nread; i++) | |
2957 | { | |
2958 | kbd_buffer_store_event (&buf[i]); | |
2959 | /* Don't look at input that follows a C-g too closely. | |
2960 | This reduces lossage due to autorepeat on C-g. */ | |
2961 | if (buf[i].kind == ascii_keystroke | |
2962 | && XINT(buf[i].code) == quit_char) | |
2963 | break; | |
2964 | } | |
2965 | ||
2966 | return nread; | |
2967 | } | |
2968 | #endif /* not VMS */ | |
2969 | \f | |
2970 | #ifdef SIGIO /* for entire page */ | |
2971 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
2972 | ||
2ce30ea2 | 2973 | SIGTYPE |
284f4730 JB |
2974 | input_available_signal (signo) |
2975 | int signo; | |
2976 | { | |
2977 | /* Must preserve main program's value of errno. */ | |
2978 | int old_errno = errno; | |
2979 | #ifdef BSD4_1 | |
2980 | extern int select_alarmed; | |
2981 | #endif | |
2982 | ||
2983 | #ifdef USG | |
2984 | /* USG systems forget handlers when they are used; | |
2985 | must reestablish each time */ | |
2986 | signal (signo, input_available_signal); | |
2987 | #endif /* USG */ | |
2988 | ||
2989 | #ifdef BSD4_1 | |
2990 | sigisheld (SIGIO); | |
2991 | #endif | |
2992 | ||
ffd56f97 JB |
2993 | if (input_available_clear_time) |
2994 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
284f4730 JB |
2995 | |
2996 | while (1) | |
2997 | { | |
2998 | int nread; | |
2999 | nread = read_avail_input (1); | |
3000 | /* -1 means it's not ok to read the input now. | |
3001 | UNBLOCK_INPUT will read it later; now, avoid infinite loop. | |
3002 | 0 means there was no keyboard input available. */ | |
3003 | if (nread <= 0) | |
3004 | break; | |
3005 | ||
3006 | #ifdef BSD4_1 | |
3007 | select_alarmed = 1; /* Force the select emulator back to life */ | |
3008 | #endif | |
3009 | } | |
3010 | ||
3011 | #ifdef BSD4_1 | |
3012 | sigfree (); | |
3013 | #endif | |
3014 | errno = old_errno; | |
3015 | } | |
3016 | #endif /* SIGIO */ | |
ad163903 JB |
3017 | |
3018 | /* Send ourselves a SIGIO. | |
3019 | ||
3020 | This function exists so that the UNBLOCK_INPUT macro in | |
3021 | blockinput.h can have some way to take care of input we put off | |
3022 | dealing with, without assuming that every file which uses | |
3023 | UNBLOCK_INPUT also has #included the files necessary to get SIGIO. */ | |
3024 | void | |
3025 | reinvoke_input_signal () | |
3026 | { | |
3027 | #ifdef SIGIO | |
3028 | kill (0, SIGIO); | |
3029 | #endif | |
3030 | } | |
3031 | ||
3032 | ||
284f4730 JB |
3033 | \f |
3034 | /* Return the prompt-string of a sparse keymap. | |
3035 | This is the first element which is a string. | |
3036 | Return nil if there is none. */ | |
3037 | ||
3038 | Lisp_Object | |
3039 | map_prompt (map) | |
3040 | Lisp_Object map; | |
3041 | { | |
3042 | while (CONSP (map)) | |
3043 | { | |
3044 | register Lisp_Object tem; | |
3045 | tem = Fcar (map); | |
3046 | if (XTYPE (tem) == Lisp_String) | |
3047 | return tem; | |
3048 | map = Fcdr (map); | |
3049 | } | |
3050 | return Qnil; | |
3051 | } | |
3052 | ||
5ec75a55 RS |
3053 | static Lisp_Object menu_bar_item (); |
3054 | static Lisp_Object menu_bar_one_keymap (); | |
3055 | ||
3056 | /* Return a list of menu items for a menu bar, appropriate | |
3057 | to the current buffer. | |
3058 | The elements have the form (KEY STRING . nil). */ | |
3059 | ||
3060 | Lisp_Object | |
3061 | menu_bar_items () | |
3062 | { | |
3063 | /* The number of keymaps we're scanning right now, and the number of | |
3064 | keymaps we have allocated space for. */ | |
3065 | int nmaps; | |
3066 | ||
3067 | /* maps[0..nmaps-1] are the prefix definitions of KEYBUF[0..t-1] | |
3068 | in the current keymaps, or nil where it is not a prefix. */ | |
3069 | Lisp_Object *maps; | |
3070 | ||
3071 | Lisp_Object def, tem; | |
3072 | ||
3073 | Lisp_Object result; | |
3074 | ||
3075 | int mapno; | |
47d319aa | 3076 | Lisp_Object oquit; |
5ec75a55 | 3077 | |
db60d856 JB |
3078 | /* In order to build the menus, we need to call the keymap |
3079 | accessors. They all call QUIT. But this function is called | |
3080 | during redisplay, during which a quit is fatal. So inhibit | |
47d319aa RS |
3081 | quitting while building the menus. |
3082 | We do this instead of specbind because (1) errors will clear it anyway | |
3083 | and (2) this avoids risk of specpdl overflow. */ | |
3084 | oquit = Vinhibit_quit; | |
3085 | Vinhibit_quit = Qt; | |
db60d856 | 3086 | |
5ec75a55 RS |
3087 | /* Build our list of keymaps. |
3088 | If we recognize a function key and replace its escape sequence in | |
3089 | keybuf with its symbol, or if the sequence starts with a mouse | |
3090 | click and we need to switch buffers, we jump back here to rebuild | |
3091 | the initial keymaps from the current buffer. */ | |
3092 | { | |
3093 | Lisp_Object *tmaps; | |
3094 | ||
3095 | nmaps = current_minor_maps (0, &tmaps) + 2; | |
3096 | maps = (Lisp_Object *) alloca (nmaps * sizeof (maps[0])); | |
3097 | bcopy (tmaps, maps, (nmaps - 2) * sizeof (maps[0])); | |
3098 | #ifdef USE_TEXT_PROPERTIES | |
3099 | maps[nmaps-2] = get_local_map (PT, current_buffer); | |
3100 | #else | |
a6d53864 | 3101 | maps[nmaps-2] = current_buffer->keymap; |
5ec75a55 RS |
3102 | #endif |
3103 | maps[nmaps-1] = global_map; | |
3104 | } | |
3105 | ||
3106 | /* Look up in each map the dummy prefix key `menu-bar'. */ | |
3107 | ||
3108 | result = Qnil; | |
3109 | ||
3110 | for (mapno = 0; mapno < nmaps; mapno++) | |
3111 | { | |
3112 | if (! NILP (maps[mapno])) | |
e74fbc70 | 3113 | def = get_keyelt (access_keymap (maps[mapno], Qmenu_bar, 1, 0)); |
5ec75a55 RS |
3114 | else |
3115 | def = Qnil; | |
3116 | ||
3117 | tem = Fkeymapp (def); | |
3118 | if (!NILP (tem)) | |
3119 | result = menu_bar_one_keymap (def, result); | |
3120 | } | |
3121 | ||
85e28fa2 | 3122 | result = Fnreverse (result); |
47d319aa | 3123 | Vinhibit_quit = oquit; |
85e28fa2 | 3124 | return result; |
5ec75a55 RS |
3125 | } |
3126 | \f | |
3127 | /* Scan one map KEYMAP, accumulating any menu items it defines | |
3128 | that have not yet been seen in RESULT. Return the updated RESULT. */ | |
3129 | ||
3130 | static Lisp_Object | |
3131 | menu_bar_one_keymap (keymap, result) | |
3132 | Lisp_Object keymap, result; | |
3133 | { | |
3134 | Lisp_Object tail, item, key, binding, item_string, table; | |
3135 | ||
3136 | /* Loop over all keymap entries that have menu strings. */ | |
3137 | for (tail = keymap; XTYPE (tail) == Lisp_Cons; tail = XCONS (tail)->cdr) | |
3138 | { | |
3139 | item = XCONS (tail)->car; | |
3140 | if (XTYPE (item) == Lisp_Cons) | |
3141 | { | |
3142 | key = XCONS (item)->car; | |
3143 | binding = XCONS (item)->cdr; | |
3144 | if (XTYPE (binding) == Lisp_Cons) | |
3145 | { | |
3146 | item_string = XCONS (binding)->car; | |
3147 | if (XTYPE (item_string) == Lisp_String) | |
3148 | result = menu_bar_item (key, item_string, | |
3149 | Fcdr (binding), result); | |
3150 | } | |
3151 | } | |
3152 | else if (XTYPE (item) == Lisp_Vector) | |
3153 | { | |
3154 | /* Loop over the char values represented in the vector. */ | |
3155 | int len = XVECTOR (item)->size; | |
3156 | int c; | |
3157 | for (c = 0; c < len; c++) | |
3158 | { | |
3159 | Lisp_Object character; | |
3160 | XFASTINT (character) = c; | |
3161 | binding = XVECTOR (item)->contents[c]; | |
3162 | if (XTYPE (binding) == Lisp_Cons) | |
3163 | { | |
3164 | item_string = XCONS (binding)->car; | |
3165 | if (XTYPE (item_string) == Lisp_String) | |
3166 | result = menu_bar_item (key, item_string, | |
3167 | Fcdr (binding), result); | |
3168 | } | |
3169 | } | |
3170 | } | |
3171 | } | |
3172 | ||
3173 | return result; | |
3174 | } | |
3175 | ||
3176 | static Lisp_Object | |
3177 | menu_bar_item (key, item_string, def, result) | |
3178 | Lisp_Object key, item_string, def, result; | |
3179 | { | |
3180 | Lisp_Object tem, elt; | |
3181 | Lisp_Object enabled; | |
3182 | ||
3183 | /* See if this entry is enabled. */ | |
3184 | enabled = Qt; | |
3185 | ||
3186 | if (XTYPE (def) == Lisp_Symbol) | |
3187 | { | |
3188 | /* No property, or nil, means enable. | |
3189 | Otherwise, enable if value is not nil. */ | |
3190 | tem = Fget (def, Qmenu_enable); | |
3191 | if (!NILP (tem)) | |
3192 | enabled = Feval (tem); | |
3193 | } | |
3194 | ||
3195 | /* Add an entry for this key and string | |
3196 | if there is none yet. */ | |
3197 | elt = Fassq (key, result); | |
3198 | if (!NILP (enabled) && NILP (elt)) | |
3199 | result = Fcons (Fcons (key, Fcons (item_string, Qnil)), result); | |
3200 | ||
3201 | return result; | |
3202 | } | |
3203 | \f | |
284f4730 JB |
3204 | static int echo_flag; |
3205 | static int echo_now; | |
3206 | ||
3207 | /* Read a character like read_char but optionally prompt based on maps | |
dbc4e1c1 JB |
3208 | in the array MAPS. NMAPS is the length of MAPS. Return nil if we |
3209 | decided not to read a character, because there are no menu items in | |
3210 | MAPS. | |
7d6de002 RS |
3211 | |
3212 | PREV_EVENT is the previous input event, or nil if we are reading | |
3213 | the first event of a key sequence. | |
3214 | ||
6569cc8d JB |
3215 | If USED_MOUSE_MENU is non-zero, then we set *USED_MOUSE_MENU to 1 |
3216 | if we used a mouse menu to read the input, or zero otherwise. If | |
3217 | USED_MOUSE_MENU is zero, *USED_MOUSE_MENU is left alone. | |
284f4730 JB |
3218 | |
3219 | The prompting is done based on the prompt-string of the map | |
3220 | and the strings associated with various map elements. */ | |
3221 | ||
7617111f | 3222 | static Lisp_Object |
7d6de002 RS |
3223 | read_char_menu_prompt (nmaps, maps, prev_event, used_mouse_menu) |
3224 | int nmaps; | |
3225 | Lisp_Object *maps; | |
3226 | Lisp_Object prev_event; | |
3227 | int *used_mouse_menu; | |
284f4730 | 3228 | { |
7d6de002 RS |
3229 | int mapno; |
3230 | register Lisp_Object name; | |
284f4730 | 3231 | int nlength; |
ff11dfa1 | 3232 | int width = FRAME_WIDTH (selected_frame) - 4; |
7d6de002 RS |
3233 | char *menu = (char *) alloca (width + 4); |
3234 | int idx = -1; | |
3235 | Lisp_Object rest, vector; | |
3236 | ||
6569cc8d JB |
3237 | if (used_mouse_menu) |
3238 | *used_mouse_menu = 0; | |
284f4730 JB |
3239 | |
3240 | /* Use local over global Menu maps */ | |
3241 | ||
7d6de002 RS |
3242 | if (! menu_prompting) |
3243 | return Qnil; | |
3244 | ||
3245 | /* Get the menu name from the first map that has one (a prompt string). */ | |
3246 | for (mapno = 0; mapno < nmaps; mapno++) | |
3247 | { | |
3248 | name = map_prompt (maps[mapno]); | |
3249 | if (!NILP (name)) | |
3250 | break; | |
3251 | } | |
284f4730 | 3252 | |
7d6de002 | 3253 | /* If we don't have any menus, just read a character normally. */ |
dbc4e1c1 | 3254 | if (mapno >= nmaps) |
7d6de002 RS |
3255 | return Qnil; |
3256 | ||
dbc4e1c1 JB |
3257 | #ifdef HAVE_X_WINDOWS |
3258 | #ifdef HAVE_X_MENU | |
7d6de002 RS |
3259 | /* If we got to this point via a mouse click, |
3260 | use a real menu for mouse selection. */ | |
dbc4e1c1 | 3261 | if (EVENT_HAS_PARAMETERS (prev_event)) |
7d6de002 RS |
3262 | { |
3263 | /* Display the menu and get the selection. */ | |
3264 | Lisp_Object *realmaps | |
3265 | = (Lisp_Object *) alloca (nmaps * sizeof (Lisp_Object)); | |
3266 | Lisp_Object value; | |
3267 | int nmaps1 = 0; | |
3268 | ||
3269 | /* Use the maps that are not nil. */ | |
3270 | for (mapno = 0; mapno < nmaps; mapno++) | |
3271 | if (!NILP (maps[mapno])) | |
3272 | realmaps[nmaps1++] = maps[mapno]; | |
3273 | ||
3274 | value = Fx_popup_menu (prev_event, Flist (nmaps1, realmaps)); | |
663258f2 JB |
3275 | if (CONSP (value)) |
3276 | { | |
3277 | /* If we got more than one event, put all but the first | |
3278 | onto this list to be read later. | |
3279 | Return just the first event now. */ | |
3280 | unread_command_events | |
3281 | = nconc2 (XCONS (value)->cdr, unread_command_events); | |
3282 | value = XCONS (value)->car; | |
3283 | } | |
7d6de002 RS |
3284 | if (NILP (value)) |
3285 | XSET (value, Lisp_Int, quit_char); | |
6569cc8d JB |
3286 | if (used_mouse_menu) |
3287 | *used_mouse_menu = 1; | |
7d6de002 RS |
3288 | return value; |
3289 | } | |
dbc4e1c1 JB |
3290 | #endif /* HAVE_X_MENU */ |
3291 | #endif /* HAVE_X_WINDOWS */ | |
284f4730 JB |
3292 | |
3293 | /* Prompt string always starts with map's prompt, and a space. */ | |
3294 | strcpy (menu, XSTRING (name)->data); | |
3295 | nlength = XSTRING (name)->size; | |
7d6de002 | 3296 | menu[nlength++] = ':'; |
284f4730 JB |
3297 | menu[nlength++] = ' '; |
3298 | menu[nlength] = 0; | |
3299 | ||
7d6de002 RS |
3300 | /* Start prompting at start of first map. */ |
3301 | mapno = 0; | |
3302 | rest = maps[mapno]; | |
284f4730 JB |
3303 | |
3304 | /* Present the documented bindings, a line at a time. */ | |
3305 | while (1) | |
3306 | { | |
3307 | int notfirst = 0; | |
3308 | int i = nlength; | |
3309 | Lisp_Object obj; | |
3310 | int ch; | |
3311 | ||
284f4730 | 3312 | /* Loop over elements of map. */ |
7d6de002 | 3313 | while (i < width) |
284f4730 | 3314 | { |
7d6de002 | 3315 | Lisp_Object s, elt; |
284f4730 | 3316 | |
7d6de002 RS |
3317 | /* If reached end of map, start at beginning of next map. */ |
3318 | if (NILP (rest)) | |
3319 | { | |
3320 | mapno++; | |
3321 | /* At end of last map, wrap around to first map if just starting, | |
3322 | or end this line if already have something on it. */ | |
3323 | if (mapno == nmaps) | |
284f4730 | 3324 | { |
7d6de002 RS |
3325 | if (notfirst) |
3326 | break; | |
3327 | else | |
3328 | mapno = 0; | |
284f4730 | 3329 | } |
7d6de002 | 3330 | rest = maps[mapno]; |
284f4730 | 3331 | } |
7d6de002 RS |
3332 | |
3333 | /* Look at the next element of the map. */ | |
3334 | if (idx >= 0) | |
3335 | elt = XVECTOR (vector)->contents[idx]; | |
284f4730 | 3336 | else |
7d6de002 RS |
3337 | elt = Fcar_safe (rest); |
3338 | ||
3339 | if (idx < 0 && XTYPE (elt) == Lisp_Vector) | |
284f4730 | 3340 | { |
7d6de002 RS |
3341 | /* If we found a dense table in the keymap, |
3342 | advanced past it, but start scanning its contents. */ | |
3343 | rest = Fcdr_safe (rest); | |
3344 | vector = elt; | |
3345 | idx = 0; | |
284f4730 | 3346 | } |
7d6de002 RS |
3347 | else |
3348 | { | |
3349 | /* An ordinary element. */ | |
3350 | s = Fcar_safe (Fcdr_safe (elt)); | |
3351 | if (XTYPE (s) != Lisp_String) | |
3352 | /* Ignore the element if it has no prompt string. */ | |
3353 | ; | |
3354 | /* If we have room for the prompt string, add it to this line. | |
3355 | If this is the first on the line, always add it. */ | |
3356 | else if (XSTRING (s)->size + i < width | |
3357 | || !notfirst) | |
3358 | { | |
3359 | int thiswidth; | |
284f4730 | 3360 | |
7d6de002 RS |
3361 | /* Punctuate between strings. */ |
3362 | if (notfirst) | |
3363 | { | |
3364 | strcpy (menu + i, ", "); | |
3365 | i += 2; | |
3366 | } | |
3367 | notfirst = 1; | |
3368 | ||
3369 | /* Add as much of string as fits. */ | |
3370 | thiswidth = XSTRING (s)->size; | |
3371 | if (thiswidth + i > width) | |
3372 | thiswidth = width - i; | |
3373 | bcopy (XSTRING (s)->data, menu + i, thiswidth); | |
3374 | i += thiswidth; | |
3375 | } | |
3376 | else | |
3377 | { | |
3378 | /* If this element does not fit, end the line now, | |
3379 | and save the element for the next line. */ | |
3380 | strcpy (menu + i, "..."); | |
3381 | break; | |
3382 | } | |
3383 | ||
3384 | /* Move past this element. */ | |
3385 | if (idx >= 0 && idx + 1 >= XVECTOR (rest)->size) | |
3386 | /* Handle reaching end of dense table. */ | |
3387 | idx = -1; | |
3388 | if (idx >= 0) | |
3389 | idx++; | |
3390 | else | |
3391 | rest = Fcdr_safe (rest); | |
3392 | } | |
284f4730 JB |
3393 | } |
3394 | ||
3395 | /* Prompt with that and read response. */ | |
3396 | message1 (menu); | |
7d6de002 | 3397 | obj = read_char (1, 0, 0, Qnil, 0); |
284f4730 JB |
3398 | |
3399 | if (XTYPE (obj) != Lisp_Int) | |
3400 | return obj; | |
3401 | else | |
3402 | ch = XINT (obj); | |
3403 | ||
f4255cd1 | 3404 | if (! EQ (obj, menu_prompt_more_char) |
284f4730 | 3405 | && (XTYPE (menu_prompt_more_char) != Lisp_Int |
f4255cd1 | 3406 | || ! EQ (obj, make_number (Ctl (XINT (menu_prompt_more_char)))))) |
284f4730 JB |
3407 | return obj; |
3408 | } | |
3409 | } | |
284f4730 JB |
3410 | \f |
3411 | /* Reading key sequences. */ | |
3412 | ||
3413 | /* Follow KEY in the maps in CURRENT[0..NMAPS-1], placing its bindings | |
3414 | in DEFS[0..NMAPS-1]. Set NEXT[i] to DEFS[i] if DEFS[i] is a | |
3415 | keymap, or nil otherwise. Return the index of the first keymap in | |
3416 | which KEY has any binding, or NMAPS if no map has a binding. | |
3417 | ||
3418 | If KEY is a meta ASCII character, treat it like meta-prefix-char | |
3419 | followed by the corresponding non-meta character. Keymaps in | |
3420 | CURRENT with non-prefix bindings for meta-prefix-char become nil in | |
3421 | NEXT. | |
3422 | ||
3423 | When KEY is not defined in any of the keymaps, if it is an upper | |
3424 | case letter and there are bindings for the corresponding lower-case | |
3425 | letter, return the bindings for the lower-case letter. | |
3426 | ||
88cb0656 JB |
3427 | If KEY has no bindings in any of the CURRENT maps, NEXT is left |
3428 | unmodified. | |
3429 | ||
284f4730 JB |
3430 | NEXT may == CURRENT. */ |
3431 | ||
3432 | static int | |
3433 | follow_key (key, nmaps, current, defs, next) | |
3434 | Lisp_Object key; | |
3435 | Lisp_Object *current, *defs, *next; | |
3436 | int nmaps; | |
3437 | { | |
3438 | int i, first_binding; | |
3439 | ||
3440 | /* If KEY is a meta ASCII character, treat it like meta-prefix-char | |
3441 | followed by the corresponding non-meta character. */ | |
86e5706b | 3442 | if (XTYPE (key) == Lisp_Int && (XINT (key) & CHAR_META)) |
284f4730 JB |
3443 | { |
3444 | for (i = 0; i < nmaps; i++) | |
3445 | if (! NILP (current[i])) | |
3446 | { | |
cd21b839 | 3447 | next[i] = |
e74fbc70 | 3448 | get_keyelt (access_keymap (current[i], meta_prefix_char, 1, 0)); |
284f4730 JB |
3449 | |
3450 | /* Note that since we pass the resulting bindings through | |
3451 | get_keymap_1, non-prefix bindings for meta-prefix-char | |
3452 | disappear. */ | |
f4255cd1 | 3453 | next[i] = get_keymap_1 (next[i], 0, 1); |
284f4730 JB |
3454 | } |
3455 | else | |
3456 | next[i] = Qnil; | |
3457 | ||
3458 | current = next; | |
86e5706b | 3459 | XSET (key, Lisp_Int, XFASTINT (key) & ~CHAR_META); |
284f4730 JB |
3460 | } |
3461 | ||
3462 | first_binding = nmaps; | |
3463 | for (i = nmaps - 1; i >= 0; i--) | |
3464 | { | |
3465 | if (! NILP (current[i])) | |
3466 | { | |
e74fbc70 | 3467 | defs[i] = get_keyelt (access_keymap (current[i], key, 1, 0)); |
284f4730 JB |
3468 | if (! NILP (defs[i])) |
3469 | first_binding = i; | |
3470 | } | |
3471 | else | |
3472 | defs[i] = Qnil; | |
3473 | } | |
3474 | ||
3475 | /* When KEY is not defined in any of the keymaps, if it is an upper | |
3476 | case letter and there are bindings for the corresponding | |
3477 | lower-case letter, return the bindings for the lower-case letter. */ | |
3478 | if (first_binding == nmaps | |
3479 | && XTYPE (key) == Lisp_Int | |
bb1ef421 RS |
3480 | && ((((XINT (key) & 0x3ffff) |
3481 | < XSTRING (current_buffer->downcase_table)->size) | |
3482 | && UPPERCASEP (XINT (key) & 0x3ffff)) | |
86e5706b | 3483 | || (XINT (key) & shift_modifier))) |
284f4730 | 3484 | { |
86e5706b RS |
3485 | if (XINT (key) & shift_modifier) |
3486 | XSETINT (key, XINT (key) & ~shift_modifier); | |
3487 | else | |
3488 | XSETINT (key, DOWNCASE (XINT (key))); | |
284f4730 JB |
3489 | |
3490 | first_binding = nmaps; | |
3491 | for (i = nmaps - 1; i >= 0; i--) | |
3492 | { | |
3493 | if (! NILP (current[i])) | |
3494 | { | |
e74fbc70 | 3495 | defs[i] = get_keyelt (access_keymap (current[i], key, 1, 0)); |
284f4730 JB |
3496 | if (! NILP (defs[i])) |
3497 | first_binding = i; | |
3498 | } | |
3499 | else | |
3500 | defs[i] = Qnil; | |
3501 | } | |
3502 | } | |
86e5706b | 3503 | |
284f4730 | 3504 | /* Given the set of bindings we've found, produce the next set of maps. */ |
0a7f1fc0 JB |
3505 | if (first_binding < nmaps) |
3506 | for (i = 0; i < nmaps; i++) | |
f4255cd1 | 3507 | next[i] = NILP (defs[i]) ? Qnil : get_keymap_1 (defs[i], 0, 1); |
284f4730 JB |
3508 | |
3509 | return first_binding; | |
3510 | } | |
3511 | ||
f4255cd1 JB |
3512 | /* Read a sequence of keys that ends with a non prefix character, |
3513 | storing it in KEYBUF, a buffer of size BUFSIZE. | |
3514 | Prompt with PROMPT. | |
284f4730 JB |
3515 | Return the length of the key sequence stored. |
3516 | ||
f4255cd1 JB |
3517 | Echo starting immediately unless `prompt' is 0. |
3518 | ||
3519 | Where a key sequence ends depends on the currently active keymaps. | |
3520 | These include any minor mode keymaps active in the current buffer, | |
3521 | the current buffer's local map, and the global map. | |
3522 | ||
3523 | If a key sequence has no other bindings, we check Vfunction_key_map | |
3524 | to see if some trailing subsequence might be the beginning of a | |
3525 | function key's sequence. If so, we try to read the whole function | |
3526 | key, and substitute its symbolic name into the key sequence. | |
3527 | ||
3528 | We ignore unbound `down-' mouse clicks. We turn unbound `drag-' | |
3529 | events into similar click events, if that would make them bound. | |
3530 | ||
3531 | If we get a mouse click in a mode line, vertical divider, or other | |
3532 | non-text area, we treat the click as if it were prefixed by the | |
3533 | symbol denoting that area - `mode-line', `vertical-line', or | |
3534 | whatever. | |
3535 | ||
3536 | If the sequence starts with a mouse click, we read the key sequence | |
3537 | with respect to the buffer clicked on, not the current buffer. | |
284f4730 | 3538 | |
f4255cd1 JB |
3539 | If the user switches frames in the midst of a key sequence, we put |
3540 | off the switch-frame event until later; the next call to | |
3541 | read_char will return it. */ | |
48e416d4 | 3542 | |
284f4730 JB |
3543 | static int |
3544 | read_key_sequence (keybuf, bufsize, prompt) | |
3545 | Lisp_Object *keybuf; | |
3546 | int bufsize; | |
f4255cd1 | 3547 | char *prompt; |
284f4730 | 3548 | { |
f4255cd1 JB |
3549 | int count = specpdl_ptr - specpdl; |
3550 | ||
284f4730 JB |
3551 | /* How many keys there are in the current key sequence. */ |
3552 | int t; | |
3553 | ||
284f4730 JB |
3554 | /* The length of the echo buffer when we started reading, and |
3555 | the length of this_command_keys when we started reading. */ | |
3556 | int echo_start; | |
f4255cd1 | 3557 | int keys_start; |
284f4730 JB |
3558 | |
3559 | /* The number of keymaps we're scanning right now, and the number of | |
3560 | keymaps we have allocated space for. */ | |
3561 | int nmaps; | |
3562 | int nmaps_allocated = 0; | |
3563 | ||
284f4730 JB |
3564 | /* defs[0..nmaps-1] are the definitions of KEYBUF[0..t-1] in |
3565 | the current keymaps. */ | |
3566 | Lisp_Object *defs; | |
3567 | ||
f4255cd1 JB |
3568 | /* submaps[0..nmaps-1] are the prefix definitions of KEYBUF[0..t-1] |
3569 | in the current keymaps, or nil where it is not a prefix. */ | |
3570 | Lisp_Object *submaps; | |
3571 | ||
3572 | /* The index in defs[] of the first keymap that has a binding for | |
3573 | this key sequence. In other words, the lowest i such that | |
3574 | defs[i] is non-nil. */ | |
284f4730 JB |
3575 | int first_binding; |
3576 | ||
f4255cd1 | 3577 | /* If t < mock_input, then KEYBUF[t] should be read as the next |
253598e4 JB |
3578 | input key. |
3579 | ||
3580 | We use this to recover after recognizing a function key. Once we | |
3581 | realize that a suffix of the current key sequence is actually a | |
3582 | function key's escape sequence, we replace the suffix with the | |
3583 | function key's binding from Vfunction_key_map. Now keybuf | |
f4255cd1 JB |
3584 | contains a new and different key sequence, so the echo area, |
3585 | this_command_keys, and the submaps and defs arrays are wrong. In | |
3586 | this situation, we set mock_input to t, set t to 0, and jump to | |
3587 | restart_sequence; the loop will read keys from keybuf up until | |
3588 | mock_input, thus rebuilding the state; and then it will resume | |
3589 | reading characters from the keyboard. */ | |
284f4730 JB |
3590 | int mock_input = 0; |
3591 | ||
253598e4 | 3592 | /* If the sequence is unbound in submaps[], then |
f4255cd1 JB |
3593 | keybuf[fkey_start..fkey_end-1] is a prefix in Vfunction_key_map, |
3594 | and fkey_map is its binding. | |
253598e4 | 3595 | |
f4255cd1 JB |
3596 | These might be > t, indicating that all function key scanning |
3597 | should hold off until t reaches them. We do this when we've just | |
3598 | recognized a function key, to avoid searching for the function | |
3599 | key's again in Vfunction_key_map. */ | |
284f4730 | 3600 | int fkey_start = 0, fkey_end = 0; |
4efda7dd | 3601 | Lisp_Object fkey_map; |
284f4730 | 3602 | |
cd21b839 JB |
3603 | /* If we receive a ``switch-frame'' event in the middle of a key sequence, |
3604 | we put it off for later. While we're reading, we keep the event here. */ | |
4efda7dd | 3605 | Lisp_Object delayed_switch_frame; |
cd21b839 | 3606 | |
4efda7dd RS |
3607 | Lisp_Object first_event; |
3608 | ||
3609 | int junk; | |
3610 | ||
3611 | last_nonmenu_event = Qnil; | |
3612 | ||
3613 | delayed_switch_frame = Qnil; | |
3614 | fkey_map = Vfunction_key_map; | |
f4255cd1 JB |
3615 | |
3616 | /* If there is no function key map, turn off function key scanning. */ | |
3617 | if (NILP (Fkeymapp (Vfunction_key_map))) | |
3618 | fkey_start = fkey_end = bufsize + 1; | |
3619 | ||
284f4730 JB |
3620 | if (INTERACTIVE) |
3621 | { | |
3622 | if (prompt) | |
3623 | echo_prompt (prompt); | |
3624 | else if (cursor_in_echo_area) | |
3625 | /* This doesn't put in a dash if the echo buffer is empty, so | |
3626 | you don't always see a dash hanging out in the minibuffer. */ | |
3627 | echo_dash (); | |
284f4730 JB |
3628 | } |
3629 | ||
f4255cd1 JB |
3630 | /* Record the initial state of the echo area and this_command_keys; |
3631 | we will need to restore them if we replay a key sequence. */ | |
0a7f1fc0 | 3632 | if (INTERACTIVE) |
f4255cd1 JB |
3633 | echo_start = echo_length (); |
3634 | keys_start = this_command_key_count; | |
0a7f1fc0 | 3635 | |
a6d53864 RS |
3636 | #if 0 /* This doesn't quite work, because some of the things |
3637 | that read_char does cannot safely be bypassed. | |
3638 | It seems too risky to try to make this work right. */ | |
4efda7dd RS |
3639 | /* Read the first char of the sequence specially, before setting |
3640 | up any keymaps, in case a filter runs and switches buffers on us. */ | |
3641 | first_event = read_char (!prompt, 0, submaps, last_nonmenu_event, | |
3642 | &junk); | |
a6d53864 | 3643 | #endif |
4efda7dd | 3644 | |
7b4aedb9 JB |
3645 | /* We jump here when the key sequence has been thoroughly changed, and |
3646 | we need to rescan it starting from the beginning. When we jump here, | |
3647 | keybuf[0..mock_input] holds the sequence we should reread. */ | |
07d2b8de | 3648 | replay_sequence: |
7b4aedb9 | 3649 | |
f4255cd1 | 3650 | /* Build our list of keymaps. |
07d2b8de JB |
3651 | If we recognize a function key and replace its escape sequence in |
3652 | keybuf with its symbol, or if the sequence starts with a mouse | |
3653 | click and we need to switch buffers, we jump back here to rebuild | |
3654 | the initial keymaps from the current buffer. */ | |
284f4730 JB |
3655 | { |
3656 | Lisp_Object *maps; | |
3657 | ||
3658 | nmaps = current_minor_maps (0, &maps) + 2; | |
3659 | if (nmaps > nmaps_allocated) | |
3660 | { | |
253598e4 | 3661 | submaps = (Lisp_Object *) alloca (nmaps * sizeof (submaps[0])); |
284f4730 JB |
3662 | defs = (Lisp_Object *) alloca (nmaps * sizeof (defs[0])); |
3663 | nmaps_allocated = nmaps; | |
3664 | } | |
253598e4 | 3665 | bcopy (maps, submaps, (nmaps - 2) * sizeof (submaps[0])); |
497ba7a1 RS |
3666 | #ifdef USE_TEXT_PROPERTIES |
3667 | submaps[nmaps-2] = get_local_map (PT, current_buffer); | |
3668 | #else | |
a6d53864 | 3669 | submaps[nmaps-2] = current_buffer->keymap; |
497ba7a1 | 3670 | #endif |
253598e4 | 3671 | submaps[nmaps-1] = global_map; |
284f4730 JB |
3672 | } |
3673 | ||
3674 | /* Find an accurate initial value for first_binding. */ | |
3675 | for (first_binding = 0; first_binding < nmaps; first_binding++) | |
253598e4 | 3676 | if (! NILP (submaps[first_binding])) |
284f4730 JB |
3677 | break; |
3678 | ||
f4255cd1 JB |
3679 | /* We jump here when a function key substitution has forced us to |
3680 | reprocess the current key sequence. keybuf[0..mock_input] is the | |
3681 | sequence we want to reread. */ | |
3682 | t = 0; | |
3683 | ||
3684 | /* These are no-ops the first time through, but if we restart, they | |
3685 | revert the echo area and this_command_keys to their original state. */ | |
3686 | this_command_key_count = keys_start; | |
3687 | if (INTERACTIVE) | |
3688 | echo_truncate (echo_start); | |
3689 | ||
3690 | /* If the best binding for the current key sequence is a keymap, | |
3691 | or we may be looking at a function key's escape sequence, keep | |
3692 | on reading. */ | |
253598e4 | 3693 | while ((first_binding < nmaps && ! NILP (submaps[first_binding])) |
284f4730 JB |
3694 | || (first_binding >= nmaps && fkey_start < t)) |
3695 | { | |
3696 | Lisp_Object key; | |
7d6de002 | 3697 | int used_mouse_menu = 0; |
284f4730 | 3698 | |
7b4aedb9 JB |
3699 | /* Where the last real key started. If we need to throw away a |
3700 | key that has expanded into more than one element of keybuf | |
3701 | (say, a mouse click on the mode line which is being treated | |
3702 | as [mode-line (mouse-...)], then we backtrack to this point | |
3703 | of keybuf. */ | |
3704 | int last_real_key_start; | |
3705 | ||
0a7f1fc0 JB |
3706 | /* These variables are analogous to echo_start and keys_start; |
3707 | while those allow us to restart the entire key sequence, | |
3708 | echo_local_start and keys_local_start allow us to throw away | |
3709 | just one key. */ | |
f4255cd1 JB |
3710 | int echo_local_start, keys_local_start, local_first_binding; |
3711 | ||
284f4730 JB |
3712 | if (t >= bufsize) |
3713 | error ("key sequence too long"); | |
3714 | ||
f4255cd1 JB |
3715 | if (INTERACTIVE) |
3716 | echo_local_start = echo_length (); | |
3717 | keys_local_start = this_command_key_count; | |
3718 | local_first_binding = first_binding; | |
3719 | ||
3720 | replay_key: | |
0a7f1fc0 | 3721 | /* These are no-ops, unless we throw away a keystroke below and |
f4255cd1 JB |
3722 | jumped back up to replay_key; in that case, these restore the |
3723 | variables to their original state, allowing us to replay the | |
0a7f1fc0 | 3724 | loop. */ |
f4255cd1 JB |
3725 | if (INTERACTIVE) |
3726 | echo_truncate (echo_local_start); | |
0a7f1fc0 JB |
3727 | this_command_key_count = keys_local_start; |
3728 | first_binding = local_first_binding; | |
3729 | ||
f4255cd1 | 3730 | /* Does mock_input indicate that we are re-reading a key sequence? */ |
284f4730 JB |
3731 | if (t < mock_input) |
3732 | { | |
3733 | key = keybuf[t]; | |
3734 | add_command_key (key); | |
3735 | echo_char (key); | |
3736 | } | |
253598e4 JB |
3737 | |
3738 | /* If not, we should actually read a character. */ | |
284f4730 JB |
3739 | else |
3740 | { | |
a6d53864 RS |
3741 | struct buffer *buf = current_buffer; |
3742 | ||
7b4aedb9 JB |
3743 | last_real_key_start = t; |
3744 | ||
a6d53864 RS |
3745 | key = read_char (!prompt, nmaps, submaps, last_nonmenu_event, |
3746 | &used_mouse_menu); | |
284f4730 | 3747 | |
f4255cd1 | 3748 | /* read_char returns -1 at the end of a macro. |
284f4730 JB |
3749 | Emacs 18 handles this by returning immediately with a |
3750 | zero, so that's what we'll do. */ | |
86e5706b | 3751 | if (XTYPE (key) == Lisp_Int && XINT (key) == -1) |
cd21b839 | 3752 | { |
f4255cd1 JB |
3753 | t = 0; |
3754 | goto done; | |
cd21b839 | 3755 | } |
284f4730 JB |
3756 | |
3757 | Vquit_flag = Qnil; | |
3758 | ||
0a7f1fc0 JB |
3759 | /* Clicks in non-text areas get prefixed by the symbol |
3760 | in their CHAR-ADDRESS field. For example, a click on | |
f4255cd1 JB |
3761 | the mode line is prefixed by the symbol `mode-line'. |
3762 | ||
3763 | Furthermore, key sequences beginning with mouse clicks | |
3764 | are read using the keymaps of the buffer clicked on, not | |
3765 | the current buffer. So we may have to switch the buffer | |
3766 | here. */ | |
cd21b839 | 3767 | if (EVENT_HAS_PARAMETERS (key)) |
0a7f1fc0 | 3768 | { |
cd21b839 | 3769 | Lisp_Object kind = EVENT_HEAD_KIND (EVENT_HEAD (key)); |
f4255cd1 | 3770 | |
cd21b839 | 3771 | if (EQ (kind, Qmouse_click)) |
0a7f1fc0 | 3772 | { |
f4255cd1 JB |
3773 | Lisp_Object window = POSN_WINDOW (EVENT_START (key)); |
3774 | Lisp_Object posn = POSN_BUFFER_POSN (EVENT_START (key)); | |
3775 | ||
3776 | /* Key sequences beginning with mouse clicks are | |
3777 | read using the keymaps in the buffer clicked on, | |
3778 | not the current buffer. If we're at the | |
3779 | beginning of a key sequence, switch buffers. */ | |
3780 | if (t == 0 | |
3781 | && XTYPE (window) == Lisp_Window | |
3782 | && XTYPE (XWINDOW (window)->buffer) == Lisp_Buffer | |
3783 | && XBUFFER (XWINDOW (window)->buffer) != current_buffer) | |
3784 | { | |
3785 | if (XTYPE (posn) == Lisp_Symbol) | |
3786 | { | |
3787 | if (t + 1 >= bufsize) | |
3788 | error ("key sequence too long"); | |
3789 | keybuf[t] = posn; | |
3790 | keybuf[t+1] = key; | |
3791 | mock_input = t + 2; | |
3792 | } | |
3793 | else | |
3794 | { | |
3795 | keybuf[t] = key; | |
3796 | mock_input = t + 1; | |
3797 | } | |
0a7f1fc0 | 3798 | |
db9e9296 JB |
3799 | /* Arrange to go back to the original buffer once we're |
3800 | done reading the key sequence. Note that we can't | |
3801 | use save_excursion_{save,restore} here, because they | |
3802 | save point as well as the current buffer; we don't | |
3803 | want to save point, because redisplay may change it, | |
eb8c3be9 | 3804 | to accommodate a Fset_window_start or something. We |
db9e9296 JB |
3805 | don't want to do this at the top of the function, |
3806 | because we may get input from a subprocess which | |
3807 | wants to change the selected window and stuff (say, | |
3808 | emacsclient). */ | |
3809 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
3810 | ||
f4255cd1 | 3811 | set_buffer_internal (XBUFFER (XWINDOW (window)->buffer)); |
07d2b8de | 3812 | goto replay_sequence; |
f4255cd1 JB |
3813 | } |
3814 | else if (XTYPE (posn) == Lisp_Symbol) | |
cd21b839 JB |
3815 | { |
3816 | if (t + 1 >= bufsize) | |
3817 | error ("key sequence too long"); | |
3818 | keybuf[t] = posn; | |
14ec05a6 JB |
3819 | mock_input = t + 1; |
3820 | ||
3821 | /* Put the rest on unread_command_events - that | |
3822 | way, if the symbol isn't bound to a prefix map, | |
3823 | then we don't lose the actual mouse event. */ | |
3824 | unread_command_events = | |
3825 | Fcons (key, unread_command_events); | |
cd21b839 | 3826 | |
a6d53864 RS |
3827 | /* If we switched buffers while reading the first event, |
3828 | replay in case we switched keymaps too. */ | |
3829 | if (buf != current_buffer && t == 0) | |
3830 | goto replay_sequence; | |
f4255cd1 | 3831 | goto replay_key; |
cd21b839 JB |
3832 | } |
3833 | } | |
3834 | else if (EQ (kind, Qswitch_frame)) | |
3835 | { | |
3836 | /* If we're at the beginning of a key sequence, go | |
3837 | ahead and return this event. If we're in the | |
3838 | midst of a key sequence, delay it until the end. */ | |
3839 | if (t > 0) | |
3840 | { | |
3841 | delayed_switch_frame = key; | |
f4255cd1 | 3842 | goto replay_key; |
cd21b839 | 3843 | } |
0a7f1fc0 | 3844 | } |
5ec75a55 RS |
3845 | else |
3846 | { | |
3847 | Lisp_Object posn = POSN_BUFFER_POSN (EVENT_START (key)); | |
3848 | ||
3849 | /* Handle menu-bar events: | |
3850 | insert the dummy prefix char `menu-bar'. */ | |
3851 | if (EQ (posn, Qmenu_bar)) | |
3852 | { | |
3853 | if (t + 1 >= bufsize) | |
3854 | error ("key sequence too long"); | |
48e416d4 RS |
3855 | /* Run the Lucid hook. */ |
3856 | call1 (Vrun_hooks, Qactivate_menubar_hook); | |
3857 | /* If it has changed current-menubar from previous value, | |
3858 | really recompute the menubar from the value. */ | |
3859 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
3860 | call0 (Qrecompute_lucid_menubar); | |
5ec75a55 RS |
3861 | keybuf[t] = posn; |
3862 | keybuf[t+1] = key; | |
3863 | mock_input = t + 2; | |
3864 | goto replay_sequence; | |
3865 | } | |
3866 | } | |
0a7f1fc0 | 3867 | } |
a6d53864 RS |
3868 | |
3869 | /* If we switched buffers while reading the first event, | |
3870 | replay in case we switched keymaps too. */ | |
3871 | if (buf != current_buffer && t == 0) | |
3872 | { | |
3873 | keybuf[t++] = key; | |
3874 | mock_input = t; | |
3875 | goto replay_sequence; | |
3876 | } | |
284f4730 | 3877 | } |
f4255cd1 JB |
3878 | |
3879 | /* We have finally decided that KEY is something we might want | |
3880 | to look up. */ | |
284f4730 JB |
3881 | first_binding = (follow_key (key, |
3882 | nmaps - first_binding, | |
253598e4 | 3883 | submaps + first_binding, |
284f4730 | 3884 | defs + first_binding, |
253598e4 | 3885 | submaps + first_binding) |
284f4730 | 3886 | + first_binding); |
0a7f1fc0 | 3887 | |
f4255cd1 | 3888 | /* If KEY wasn't bound, we'll try some fallbacks. */ |
0a7f1fc0 JB |
3889 | if (first_binding >= nmaps) |
3890 | { | |
3891 | Lisp_Object head = EVENT_HEAD (key); | |
3892 | ||
3893 | if (XTYPE (head) == Lisp_Symbol) | |
3894 | { | |
3895 | Lisp_Object breakdown = parse_modifiers (head); | |
80645119 | 3896 | int modifiers = XINT (XCONS (XCONS (breakdown)->cdr)->car); |
0a7f1fc0 JB |
3897 | |
3898 | /* We drop unbound `down-' events altogether. */ | |
3899 | if (modifiers & down_modifier) | |
3900 | { | |
7b4aedb9 JB |
3901 | /* Dispose of this event by simply jumping back to |
3902 | replay_key, to get another event. | |
3903 | ||
3904 | Note that if this event came from mock input, | |
3905 | then just jumping back to replay_key will just | |
3906 | hand it to us again. So we have to wipe out any | |
3907 | mock input. | |
3908 | ||
3909 | We could delete keybuf[t] and shift everything | |
3910 | after that to the left by one spot, but we'd also | |
3911 | have to fix up any variable that points into | |
3912 | keybuf, and shifting isn't really necessary | |
3913 | anyway. | |
3914 | ||
3915 | Adding prefixes for non-textual mouse clicks | |
3916 | creates two characters of mock input, and both | |
3917 | must be thrown away. If we're only looking at | |
3918 | the prefix now, we can just jump back to | |
3919 | replay_key. On the other hand, if we've already | |
3920 | processed the prefix, and now the actual click | |
3921 | itself is giving us trouble, then we've lost the | |
3922 | state of the keymaps we want to backtrack to, and | |
3923 | we need to replay the whole sequence to rebuild | |
3924 | it. | |
3925 | ||
f4255cd1 JB |
3926 | Beyond that, only function key expansion could |
3927 | create more than two keys, but that should never | |
3928 | generate mouse events, so it's okay to zero | |
3929 | mock_input in that case too. | |
7b4aedb9 | 3930 | |
0a7f1fc0 | 3931 | Isn't this just the most wonderful code ever? */ |
7b4aedb9 JB |
3932 | if (t == last_real_key_start) |
3933 | { | |
3934 | mock_input = 0; | |
3935 | goto replay_key; | |
3936 | } | |
3937 | else | |
3938 | { | |
3939 | mock_input = last_real_key_start; | |
3940 | goto replay_sequence; | |
3941 | } | |
0a7f1fc0 JB |
3942 | } |
3943 | ||
3944 | /* We turn unbound `drag-' events into `click-' | |
3945 | events, if the click would be bound. */ | |
3946 | else if (modifiers & drag_modifier) | |
3947 | { | |
3948 | Lisp_Object new_head = | |
3949 | apply_modifiers (modifiers & ~drag_modifier, | |
3950 | XCONS (breakdown)->car); | |
3951 | Lisp_Object new_click = | |
3952 | Fcons (new_head, Fcons (EVENT_START (key), Qnil)); | |
3953 | ||
3954 | /* Look for a binding for this new key. follow_key | |
3955 | promises that it didn't munge submaps the | |
3956 | last time we called it, since key was unbound. */ | |
3957 | first_binding = | |
3958 | (follow_key (new_click, | |
3959 | nmaps - local_first_binding, | |
3960 | submaps + local_first_binding, | |
3961 | defs + local_first_binding, | |
3962 | submaps + local_first_binding) | |
3963 | + local_first_binding); | |
3964 | ||
3965 | /* If that click is bound, go for it. */ | |
3966 | if (first_binding < nmaps) | |
3967 | key = new_click; | |
3968 | /* Otherwise, we'll leave key set to the drag event. */ | |
3969 | } | |
3970 | } | |
3971 | } | |
3972 | ||
284f4730 | 3973 | keybuf[t++] = key; |
7d6de002 RS |
3974 | /* Normally, last_nonmenu_event gets the previous key we read. |
3975 | But when a mouse popup menu is being used, | |
3976 | we don't update last_nonmenu_event; it continues to hold the mouse | |
3977 | event that preceded the first level of menu. */ | |
3978 | if (!used_mouse_menu) | |
3979 | last_nonmenu_event = key; | |
284f4730 JB |
3980 | |
3981 | /* If the sequence is unbound, see if we can hang a function key | |
253598e4 JB |
3982 | off the end of it. We only want to scan real keyboard input |
3983 | for function key sequences, so if mock_input says that we're | |
f4255cd1 | 3984 | re-reading old events, don't examine it. */ |
284f4730 | 3985 | if (first_binding >= nmaps |
253598e4 | 3986 | && t >= mock_input) |
284f4730 JB |
3987 | { |
3988 | Lisp_Object fkey_next; | |
3989 | ||
3990 | /* Scan from fkey_end until we find a bound suffix. */ | |
3991 | while (fkey_end < t) | |
3992 | { | |
f4255cd1 JB |
3993 | Lisp_Object key; |
3994 | ||
3995 | key = keybuf[fkey_end++]; | |
067ffa38 JB |
3996 | /* Look up meta-characters by prefixing them |
3997 | with meta_prefix_char. I hate this. */ | |
d3cc13fa | 3998 | if (XTYPE (key) == Lisp_Int && XINT (key) & meta_modifier) |
f4255cd1 | 3999 | { |
e74fbc70 RS |
4000 | fkey_next |
4001 | = get_keymap_1 | |
f4255cd1 | 4002 | (get_keyelt |
e74fbc70 | 4003 | (access_keymap (fkey_map, meta_prefix_char, 1, 0)), |
f4255cd1 | 4004 | 0, 1); |
d3cc13fa | 4005 | XFASTINT (key) = XFASTINT (key) & ~meta_modifier; |
f4255cd1 | 4006 | } |
067ffa38 JB |
4007 | else |
4008 | fkey_next = fkey_map; | |
4009 | ||
e74fbc70 RS |
4010 | fkey_next |
4011 | = get_keyelt (access_keymap (fkey_next, key, 1, 0)); | |
067ffa38 | 4012 | |
85bc5181 | 4013 | /* If keybuf[fkey_start..fkey_end] is bound in the |
a764a753 | 4014 | function key map and it's a suffix of the current |
85bc5181 | 4015 | sequence (i.e. fkey_end == t), replace it with |
a764a753 | 4016 | the binding and restart with fkey_start at the end. */ |
284f4730 JB |
4017 | if (XTYPE (fkey_next) == Lisp_Vector |
4018 | && fkey_end == t) | |
4019 | { | |
4020 | t = fkey_start + XVECTOR (fkey_next)->size; | |
4021 | if (t >= bufsize) | |
4022 | error ("key sequence too long"); | |
4023 | ||
4024 | bcopy (XVECTOR (fkey_next)->contents, | |
4025 | keybuf + fkey_start, | |
4026 | (t - fkey_start) * sizeof (keybuf[0])); | |
4027 | ||
4028 | mock_input = t; | |
4029 | fkey_start = fkey_end = t; | |
32e6d806 | 4030 | fkey_map = Vfunction_key_map; |
284f4730 | 4031 | |
f4255cd1 | 4032 | goto replay_sequence; |
284f4730 JB |
4033 | } |
4034 | ||
f4255cd1 | 4035 | fkey_map = get_keymap_1 (fkey_next, 0, 1); |
284f4730 | 4036 | |
a764a753 JB |
4037 | /* If we no longer have a bound suffix, try a new positions for |
4038 | fkey_start. */ | |
284f4730 JB |
4039 | if (NILP (fkey_map)) |
4040 | { | |
4041 | fkey_end = ++fkey_start; | |
4042 | fkey_map = Vfunction_key_map; | |
4043 | } | |
4044 | } | |
4045 | } | |
4046 | } | |
4047 | ||
4048 | read_key_sequence_cmd = (first_binding < nmaps | |
4049 | ? defs[first_binding] | |
4050 | : Qnil); | |
4051 | ||
f4255cd1 | 4052 | done: |
cd21b839 | 4053 | unread_switch_frame = delayed_switch_frame; |
f4255cd1 | 4054 | unbind_to (count, Qnil); |
284f4730 JB |
4055 | return t; |
4056 | } | |
4057 | ||
c0a58692 | 4058 | DEFUN ("read-key-sequence", Fread_key_sequence, Sread_key_sequence, 1, 2, 0, |
284f4730 JB |
4059 | "Read a sequence of keystrokes and return as a string or vector.\n\ |
4060 | The sequence is sufficient to specify a non-prefix command in the\n\ | |
4061 | current local and global maps.\n\ | |
4062 | \n\ | |
c0a58692 RS |
4063 | First arg PROMPT is a prompt string. If nil, do not prompt specially.\n\ |
4064 | Second (optional) arg CONTINUE-ECHO, if non-nil, means this key echos\n\ | |
4065 | as a continuation of the previous key.\n\ | |
284f4730 | 4066 | \n\ |
cb5df6ae JB |
4067 | A C-g typed while in this function is treated like any other character,\n\ |
4068 | and `quit-flag' is not set.\n\ | |
4069 | \n\ | |
4070 | If the key sequence starts with a mouse click, then the sequence is read\n\ | |
4071 | using the keymaps of the buffer of the window clicked in, not the buffer\n\ | |
4072 | of the selected window as normal.\n\ | |
4073 | \n\ | |
4074 | `read-key-sequence' drops unbound button-down events, since you normally\n\ | |
4075 | only care about the click or drag events which follow them. If a drag\n\ | |
4076 | event is unbound, but the corresponding click event would be bound,\n\ | |
4077 | `read-key-sequence' turns the drag event into a click event at the\n\ | |
4078 | drag's starting position. This means that you don't have to distinguish\n\ | |
4079 | between click and drag events unless you want to.\n\ | |
4080 | \n\ | |
4081 | `read-key-sequence' prefixes mouse events on mode lines, the vertical\n\ | |
3c370943 JB |
4082 | lines separating windows, and scroll bars with imaginary keys\n\ |
4083 | `mode-line', `vertical-line', and `vertical-scroll-bar'.\n\ | |
cb5df6ae JB |
4084 | \n\ |
4085 | If the user switches frames in the middle of a key sequence, the\n\ | |
4086 | frame-switch event is put off until after the current key sequence.\n\ | |
4087 | \n\ | |
4088 | `read-key-sequence' checks `function-key-map' for function key\n\ | |
4089 | sequences, where they wouldn't conflict with ordinary bindings. See\n\ | |
4bb994d1 | 4090 | `function-key-map' for more details.") |
c0a58692 RS |
4091 | (prompt, continue_echo) |
4092 | Lisp_Object prompt, continue_echo; | |
284f4730 JB |
4093 | { |
4094 | Lisp_Object keybuf[30]; | |
4095 | register int i; | |
4096 | struct gcpro gcpro1, gcpro2; | |
4097 | ||
4098 | if (!NILP (prompt)) | |
4099 | CHECK_STRING (prompt, 0); | |
4100 | QUIT; | |
4101 | ||
4102 | bzero (keybuf, sizeof keybuf); | |
4103 | GCPRO1 (keybuf[0]); | |
4104 | gcpro1.nvars = (sizeof keybuf/sizeof (keybuf[0])); | |
4105 | ||
daa37602 | 4106 | if (NILP (continue_echo)) |
c0a58692 RS |
4107 | this_command_key_count = 0; |
4108 | ||
284f4730 | 4109 | i = read_key_sequence (keybuf, (sizeof keybuf/sizeof (keybuf[0])), |
f4255cd1 | 4110 | NILP (prompt) ? 0 : XSTRING (prompt)->data); |
284f4730 JB |
4111 | |
4112 | UNGCPRO; | |
86e5706b | 4113 | return make_event_array (i, keybuf); |
284f4730 JB |
4114 | } |
4115 | \f | |
4116 | DEFUN ("command-execute", Fcommand_execute, Scommand_execute, 1, 2, 0, | |
4117 | "Execute CMD as an editor command.\n\ | |
4118 | CMD must be a symbol that satisfies the `commandp' predicate.\n\ | |
4119 | Optional second arg RECORD-FLAG non-nil\n\ | |
4120 | means unconditionally put this command in `command-history'.\n\ | |
4121 | Otherwise, that is done only if an arg is read using the minibuffer.") | |
4122 | (cmd, record) | |
4123 | Lisp_Object cmd, record; | |
4124 | { | |
4125 | register Lisp_Object final; | |
4126 | register Lisp_Object tem; | |
4127 | Lisp_Object prefixarg; | |
4128 | struct backtrace backtrace; | |
4129 | extern int debug_on_next_call; | |
4130 | ||
4131 | prefixarg = Vprefix_arg, Vprefix_arg = Qnil; | |
4132 | Vcurrent_prefix_arg = prefixarg; | |
4133 | debug_on_next_call = 0; | |
4134 | ||
4135 | if (XTYPE (cmd) == Lisp_Symbol) | |
4136 | { | |
4137 | tem = Fget (cmd, Qdisabled); | |
4138 | if (!NILP (tem)) | |
4139 | return call1 (Vrun_hooks, Vdisabled_command_hook); | |
4140 | } | |
4141 | ||
4142 | while (1) | |
4143 | { | |
ffd56f97 | 4144 | final = Findirect_function (cmd); |
284f4730 JB |
4145 | |
4146 | if (CONSP (final) && (tem = Fcar (final), EQ (tem, Qautoload))) | |
4147 | do_autoload (final, cmd); | |
4148 | else | |
4149 | break; | |
4150 | } | |
4151 | ||
4152 | if (XTYPE (final) == Lisp_String | |
4153 | || XTYPE (final) == Lisp_Vector) | |
4154 | { | |
4155 | /* If requested, place the macro in the command history. For | |
4156 | other sorts of commands, call-interactively takes care of | |
4157 | this. */ | |
4158 | if (!NILP (record)) | |
4159 | Vcommand_history | |
4160 | = Fcons (Fcons (Qexecute_kbd_macro, | |
4161 | Fcons (final, Fcons (prefixarg, Qnil))), | |
4162 | Vcommand_history); | |
4163 | ||
4164 | return Fexecute_kbd_macro (final, prefixarg); | |
4165 | } | |
4166 | if (CONSP (final) || XTYPE (final) == Lisp_Subr | |
4167 | || XTYPE (final) == Lisp_Compiled) | |
4168 | { | |
4169 | backtrace.next = backtrace_list; | |
4170 | backtrace_list = &backtrace; | |
4171 | backtrace.function = &Qcall_interactively; | |
4172 | backtrace.args = &cmd; | |
4173 | backtrace.nargs = 1; | |
4174 | backtrace.evalargs = 0; | |
4175 | ||
4176 | tem = Fcall_interactively (cmd, record); | |
4177 | ||
4178 | backtrace_list = backtrace.next; | |
4179 | return tem; | |
4180 | } | |
4181 | return Qnil; | |
4182 | } | |
4183 | \f | |
284f4730 JB |
4184 | DEFUN ("execute-extended-command", Fexecute_extended_command, Sexecute_extended_command, |
4185 | 1, 1, "P", | |
4186 | "Read function name, then read its arguments and call it.") | |
4187 | (prefixarg) | |
4188 | Lisp_Object prefixarg; | |
4189 | { | |
4190 | Lisp_Object function; | |
4191 | char buf[40]; | |
4192 | Lisp_Object saved_keys; | |
4193 | struct gcpro gcpro1; | |
4194 | ||
4195 | saved_keys = Fthis_command_keys (); | |
4196 | buf[0] = 0; | |
4197 | GCPRO1 (saved_keys); | |
4198 | ||
4199 | if (EQ (prefixarg, Qminus)) | |
4200 | strcpy (buf, "- "); | |
4201 | else if (CONSP (prefixarg) && XINT (XCONS (prefixarg)->car) == 4) | |
4202 | strcpy (buf, "C-u "); | |
4203 | else if (CONSP (prefixarg) && XTYPE (XCONS (prefixarg)->car) == Lisp_Int) | |
4204 | sprintf (buf, "%d ", XINT (XCONS (prefixarg)->car)); | |
4205 | else if (XTYPE (prefixarg) == Lisp_Int) | |
4206 | sprintf (buf, "%d ", XINT (prefixarg)); | |
4207 | ||
4208 | /* This isn't strictly correct if execute-extended-command | |
4209 | is bound to anything else. Perhaps it should use | |
4210 | this_command_keys? */ | |
4211 | strcat (buf, "M-x "); | |
4212 | ||
4213 | /* Prompt with buf, and then read a string, completing from and | |
4214 | restricting to the set of all defined commands. Don't provide | |
4215 | any initial input. The last Qnil says not to perform a | |
4216 | peculiar hack on the initial input. */ | |
4217 | function = Fcompleting_read (build_string (buf), | |
4218 | Vobarray, Qcommandp, | |
4219 | Qt, Qnil, Qnil); | |
4220 | ||
1113d9db JB |
4221 | /* Set this_command_keys to the concatenation of saved_keys and |
4222 | function, followed by a RET. */ | |
284f4730 | 4223 | { |
1113d9db | 4224 | struct Lisp_String *str; |
284f4730 JB |
4225 | int i; |
4226 | Lisp_Object tem; | |
4227 | ||
1113d9db JB |
4228 | this_command_key_count = 0; |
4229 | ||
4230 | str = XSTRING (saved_keys); | |
4231 | for (i = 0; i < str->size; i++) | |
284f4730 | 4232 | { |
1113d9db | 4233 | XFASTINT (tem) = str->data[i]; |
284f4730 JB |
4234 | add_command_key (tem); |
4235 | } | |
1113d9db JB |
4236 | |
4237 | str = XSTRING (function); | |
4238 | for (i = 0; i < str->size; i++) | |
4239 | { | |
4240 | XFASTINT (tem) = str->data[i]; | |
4241 | add_command_key (tem); | |
4242 | } | |
4243 | ||
4244 | XFASTINT (tem) = '\015'; | |
4245 | add_command_key (tem); | |
284f4730 JB |
4246 | } |
4247 | ||
4248 | UNGCPRO; | |
4249 | ||
0a7f1fc0 | 4250 | function = Fintern (function, Qnil); |
284f4730 JB |
4251 | Vprefix_arg = prefixarg; |
4252 | this_command = function; | |
4253 | ||
4254 | return Fcommand_execute (function, Qt); | |
4255 | } | |
4256 | \f | |
4257 | ||
4258 | detect_input_pending () | |
4259 | { | |
4260 | if (!input_pending) | |
4261 | get_input_pending (&input_pending); | |
4262 | ||
4263 | return input_pending; | |
4264 | } | |
4265 | ||
ffd56f97 JB |
4266 | /* This is called in some cases before a possible quit. |
4267 | It cases the next call to detect_input_pending to recompute input_pending. | |
4268 | So calling this function unnecessarily can't do any harm. */ | |
4269 | clear_input_pending () | |
4270 | { | |
4271 | input_pending = 0; | |
4272 | } | |
4273 | ||
284f4730 JB |
4274 | DEFUN ("input-pending-p", Finput_pending_p, Sinput_pending_p, 0, 0, 0, |
4275 | "T if command input is currently available with no waiting.\n\ | |
4276 | Actually, the value is nil only if we can be sure that no input is available.") | |
4277 | () | |
4278 | { | |
86e5706b | 4279 | if (!NILP (unread_command_events) || unread_command_char != -1) |
284f4730 JB |
4280 | return (Qt); |
4281 | ||
4282 | return detect_input_pending () ? Qt : Qnil; | |
4283 | } | |
4284 | ||
4285 | DEFUN ("recent-keys", Frecent_keys, Srecent_keys, 0, 0, 0, | |
22d7cb89 | 4286 | "Return vector of last 100 events, not counting those from keyboard macros.") |
284f4730 JB |
4287 | () |
4288 | { | |
5160df46 | 4289 | Lisp_Object *keys = XVECTOR (recent_keys)->contents; |
284f4730 JB |
4290 | Lisp_Object val; |
4291 | ||
4292 | if (total_keys < NUM_RECENT_KEYS) | |
5160df46 | 4293 | return Fvector (total_keys, keys); |
284f4730 JB |
4294 | else |
4295 | { | |
5160df46 JB |
4296 | val = Fvector (NUM_RECENT_KEYS, keys); |
4297 | bcopy (keys + recent_keys_index, | |
284f4730 JB |
4298 | XVECTOR (val)->contents, |
4299 | (NUM_RECENT_KEYS - recent_keys_index) * sizeof (Lisp_Object)); | |
5160df46 | 4300 | bcopy (keys, |
284f4730 JB |
4301 | XVECTOR (val)->contents + NUM_RECENT_KEYS - recent_keys_index, |
4302 | recent_keys_index * sizeof (Lisp_Object)); | |
4303 | return val; | |
4304 | } | |
4305 | } | |
4306 | ||
4307 | DEFUN ("this-command-keys", Fthis_command_keys, Sthis_command_keys, 0, 0, 0, | |
e5f920d7 RS |
4308 | "Return the key sequence that invoked this command.\n\ |
4309 | The value is a string or a vector.") | |
284f4730 JB |
4310 | () |
4311 | { | |
86e5706b RS |
4312 | return make_event_array (this_command_key_count, |
4313 | XVECTOR (this_command_keys)->contents); | |
284f4730 JB |
4314 | } |
4315 | ||
4316 | DEFUN ("recursion-depth", Frecursion_depth, Srecursion_depth, 0, 0, 0, | |
4317 | "Return the current depth in recursive edits.") | |
4318 | () | |
4319 | { | |
4320 | Lisp_Object temp; | |
4321 | XFASTINT (temp) = command_loop_level + minibuf_level; | |
4322 | return temp; | |
4323 | } | |
4324 | ||
4325 | DEFUN ("open-dribble-file", Fopen_dribble_file, Sopen_dribble_file, 1, 1, | |
4326 | "FOpen dribble file: ", | |
9b2471df RS |
4327 | "Start writing all keyboard characters to a dribble file called FILE.\n\ |
4328 | If FILE is nil, close any open dribble file.") | |
284f4730 JB |
4329 | (file) |
4330 | Lisp_Object file; | |
4331 | { | |
4332 | if (NILP (file)) | |
4333 | { | |
4334 | fclose (dribble); | |
4335 | dribble = 0; | |
4336 | } | |
4337 | else | |
4338 | { | |
4339 | file = Fexpand_file_name (file, Qnil); | |
4340 | dribble = fopen (XSTRING (file)->data, "w"); | |
4341 | } | |
4342 | return Qnil; | |
4343 | } | |
4344 | ||
4345 | DEFUN ("discard-input", Fdiscard_input, Sdiscard_input, 0, 0, 0, | |
4346 | "Discard the contents of the terminal input buffer.\n\ | |
4347 | Also cancel any kbd macro being defined.") | |
4348 | () | |
4349 | { | |
4350 | defining_kbd_macro = 0; | |
4351 | update_mode_lines++; | |
4352 | ||
dbc4e1c1 | 4353 | unread_command_events = Qnil; |
86e5706b | 4354 | unread_command_char = -1; |
284f4730 JB |
4355 | |
4356 | discard_tty_input (); | |
4357 | ||
ff0b5f4c JB |
4358 | /* Without the cast, GCC complains that this assignment loses the |
4359 | volatile qualifier of kbd_store_ptr. Is there anything wrong | |
4360 | with that? */ | |
4361 | kbd_fetch_ptr = (struct input_event *) kbd_store_ptr; | |
7b4aedb9 | 4362 | Ffillarray (kbd_buffer_frame_or_window, Qnil); |
284f4730 JB |
4363 | input_pending = 0; |
4364 | ||
4365 | return Qnil; | |
4366 | } | |
4367 | \f | |
4368 | DEFUN ("suspend-emacs", Fsuspend_emacs, Ssuspend_emacs, 0, 1, "", | |
4369 | "Stop Emacs and return to superior process. You can resume later.\n\ | |
4370 | On systems that don't have job control, run a subshell instead.\n\n\ | |
4371 | If optional arg STUFFSTRING is non-nil, its characters are stuffed\n\ | |
b7d2ebbf RS |
4372 | to be read as terminal input by Emacs's parent, after suspension.\n\ |
4373 | \n\ | |
7df30614 | 4374 | Before suspending, call the functions in `suspend-hook' with no args.\n\ |
b7d2ebbf RS |
4375 | If any of them returns nil, don't call the rest and don't suspend.\n\ |
4376 | Otherwise, suspend normally and after resumption run the normal hook\n\ | |
284f4730 JB |
4377 | `suspend-resume-hook' if that is bound and non-nil.\n\ |
4378 | \n\ | |
4379 | Some operating systems cannot stop the Emacs process and resume it later.\n\ | |
b7d2ebbf | 4380 | On such systems, Emacs starts a subshell instead of suspending.") |
284f4730 JB |
4381 | (stuffstring) |
4382 | Lisp_Object stuffstring; | |
4383 | { | |
3a69360c | 4384 | Lisp_Object tem; |
284f4730 JB |
4385 | int count = specpdl_ptr - specpdl; |
4386 | int old_height, old_width; | |
4387 | int width, height; | |
b7d2ebbf | 4388 | struct gcpro gcpro1, gcpro2; |
284f4730 JB |
4389 | extern init_sys_modes (); |
4390 | ||
4391 | if (!NILP (stuffstring)) | |
4392 | CHECK_STRING (stuffstring, 0); | |
284f4730 | 4393 | |
1e95ed28 JB |
4394 | /* Run the functions in suspend-hook. */ |
4395 | if (!NILP (Vrun_hooks)) | |
4396 | call1 (Vrun_hooks, intern ("suspend-hook")); | |
284f4730 | 4397 | |
b7d2ebbf | 4398 | GCPRO1 (stuffstring); |
ff11dfa1 | 4399 | get_frame_size (&old_width, &old_height); |
284f4730 JB |
4400 | reset_sys_modes (); |
4401 | /* sys_suspend can get an error if it tries to fork a subshell | |
4402 | and the system resources aren't available for that. */ | |
4403 | record_unwind_protect (init_sys_modes, 0); | |
4404 | stuff_buffered_input (stuffstring); | |
4405 | sys_suspend (); | |
4406 | unbind_to (count, Qnil); | |
4407 | ||
4408 | /* Check if terminal/window size has changed. | |
4409 | Note that this is not useful when we are running directly | |
4410 | with a window system; but suspend should be disabled in that case. */ | |
ff11dfa1 | 4411 | get_frame_size (&width, &height); |
284f4730 | 4412 | if (width != old_width || height != old_height) |
d5045cf9 | 4413 | change_frame_size (0, height, width, 0, 0); |
284f4730 | 4414 | |
1e95ed28 | 4415 | /* Run suspend-resume-hook. */ |
284f4730 JB |
4416 | if (!NILP (Vrun_hooks)) |
4417 | call1 (Vrun_hooks, intern ("suspend-resume-hook")); | |
4418 | ||
4419 | UNGCPRO; | |
4420 | return Qnil; | |
4421 | } | |
4422 | ||
4423 | /* If STUFFSTRING is a string, stuff its contents as pending terminal input. | |
eb8c3be9 | 4424 | Then in any case stuff anything Emacs has read ahead and not used. */ |
284f4730 JB |
4425 | |
4426 | stuff_buffered_input (stuffstring) | |
4427 | Lisp_Object stuffstring; | |
4428 | { | |
4429 | register unsigned char *p; | |
4430 | ||
4431 | /* stuff_char works only in BSD, versions 4.2 and up. */ | |
4432 | #ifdef BSD | |
4433 | #ifndef BSD4_1 | |
4434 | if (XTYPE (stuffstring) == Lisp_String) | |
4435 | { | |
4436 | register int count; | |
4437 | ||
4438 | p = XSTRING (stuffstring)->data; | |
4439 | count = XSTRING (stuffstring)->size; | |
4440 | while (count-- > 0) | |
4441 | stuff_char (*p++); | |
4442 | stuff_char ('\n'); | |
4443 | } | |
4444 | /* Anything we have read ahead, put back for the shell to read. */ | |
4445 | while (kbd_fetch_ptr != kbd_store_ptr) | |
4446 | { | |
4447 | if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE) | |
4448 | kbd_fetch_ptr = kbd_buffer; | |
4449 | if (kbd_fetch_ptr->kind == ascii_keystroke) | |
4450 | stuff_char (XINT (kbd_fetch_ptr->code)); | |
4bb994d1 | 4451 | kbd_fetch_ptr->kind = no_event; |
7b4aedb9 JB |
4452 | (XVECTOR (kbd_buffer_frame_or_window)->contents[kbd_fetch_ptr |
4453 | - kbd_buffer] | |
4454 | = Qnil); | |
284f4730 JB |
4455 | kbd_fetch_ptr++; |
4456 | } | |
4457 | input_pending = 0; | |
4458 | #endif | |
4459 | #endif /* BSD and not BSD4_1 */ | |
4460 | } | |
4461 | \f | |
ffd56f97 JB |
4462 | set_waiting_for_input (time_to_clear) |
4463 | EMACS_TIME *time_to_clear; | |
284f4730 | 4464 | { |
ffd56f97 | 4465 | input_available_clear_time = time_to_clear; |
284f4730 JB |
4466 | |
4467 | /* Tell interrupt_signal to throw back to read_char, */ | |
4468 | waiting_for_input = 1; | |
4469 | ||
4470 | /* If interrupt_signal was called before and buffered a C-g, | |
4471 | make it run again now, to avoid timing error. */ | |
4472 | if (!NILP (Vquit_flag)) | |
4473 | quit_throw_to_read_char (); | |
4474 | ||
4475 | /* If alarm has gone off already, echo now. */ | |
4476 | if (echo_flag) | |
4477 | { | |
4478 | echo (); | |
4479 | echo_flag = 0; | |
4480 | } | |
4481 | } | |
4482 | ||
4483 | clear_waiting_for_input () | |
4484 | { | |
4485 | /* Tell interrupt_signal not to throw back to read_char, */ | |
4486 | waiting_for_input = 0; | |
ffd56f97 | 4487 | input_available_clear_time = 0; |
284f4730 JB |
4488 | } |
4489 | ||
4490 | /* This routine is called at interrupt level in response to C-G. | |
4491 | If interrupt_input, this is the handler for SIGINT. | |
4492 | Otherwise, it is called from kbd_buffer_store_event, | |
4493 | in handling SIGIO or SIGTINT. | |
4494 | ||
4495 | If `waiting_for_input' is non zero, then unless `echoing' is nonzero, | |
4496 | immediately throw back to read_char. | |
4497 | ||
4498 | Otherwise it sets the Lisp variable quit-flag not-nil. | |
4499 | This causes eval to throw, when it gets a chance. | |
4500 | If quit-flag is already non-nil, it stops the job right away. */ | |
4501 | ||
4502 | SIGTYPE | |
4503 | interrupt_signal () | |
4504 | { | |
4505 | char c; | |
4506 | /* Must preserve main program's value of errno. */ | |
4507 | int old_errno = errno; | |
284f4730 JB |
4508 | |
4509 | #ifdef USG | |
4510 | /* USG systems forget handlers when they are used; | |
4511 | must reestablish each time */ | |
4512 | signal (SIGINT, interrupt_signal); | |
4513 | signal (SIGQUIT, interrupt_signal); | |
4514 | #endif /* USG */ | |
4515 | ||
4516 | cancel_echoing (); | |
4517 | ||
d5045cf9 | 4518 | if (!NILP (Vquit_flag) && FRAME_TERMCAP_P (selected_frame)) |
284f4730 JB |
4519 | { |
4520 | fflush (stdout); | |
4521 | reset_sys_modes (); | |
4522 | sigfree (); | |
4523 | #ifdef SIGTSTP /* Support possible in later USG versions */ | |
4524 | /* | |
4525 | * On systems which can suspend the current process and return to the original | |
4526 | * shell, this command causes the user to end up back at the shell. | |
4527 | * The "Auto-save" and "Abort" questions are not asked until | |
4528 | * the user elects to return to emacs, at which point he can save the current | |
4529 | * job and either dump core or continue. | |
4530 | */ | |
4531 | sys_suspend (); | |
4532 | #else | |
4533 | #ifdef VMS | |
4534 | if (sys_suspend () == -1) | |
4535 | { | |
4536 | printf ("Not running as a subprocess;\n"); | |
4537 | printf ("you can continue or abort.\n"); | |
4538 | } | |
4539 | #else /* not VMS */ | |
4540 | /* Perhaps should really fork an inferior shell? | |
4541 | But that would not provide any way to get back | |
4542 | to the original shell, ever. */ | |
4543 | printf ("No support for stopping a process on this operating system;\n"); | |
4544 | printf ("you can continue or abort.\n"); | |
4545 | #endif /* not VMS */ | |
4546 | #endif /* not SIGTSTP */ | |
4547 | printf ("Auto-save? (y or n) "); | |
4548 | fflush (stdout); | |
4549 | if (((c = getchar ()) & ~040) == 'Y') | |
4550 | Fdo_auto_save (Qnil, Qnil); | |
4551 | while (c != '\n') c = getchar (); | |
4552 | #ifdef VMS | |
4553 | printf ("Abort (and enter debugger)? (y or n) "); | |
4554 | #else /* not VMS */ | |
4555 | printf ("Abort (and dump core)? (y or n) "); | |
4556 | #endif /* not VMS */ | |
4557 | fflush (stdout); | |
4558 | if (((c = getchar ()) & ~040) == 'Y') | |
4559 | abort (); | |
4560 | while (c != '\n') c = getchar (); | |
4561 | printf ("Continuing...\n"); | |
4562 | fflush (stdout); | |
4563 | init_sys_modes (); | |
4564 | } | |
4565 | else | |
4566 | { | |
4567 | /* If executing a function that wants to be interrupted out of | |
4568 | and the user has not deferred quitting by binding `inhibit-quit' | |
4569 | then quit right away. */ | |
4570 | if (immediate_quit && NILP (Vinhibit_quit)) | |
4571 | { | |
4572 | immediate_quit = 0; | |
4573 | sigfree (); | |
4574 | Fsignal (Qquit, Qnil); | |
4575 | } | |
4576 | else | |
4577 | /* Else request quit when it's safe */ | |
4578 | Vquit_flag = Qt; | |
4579 | } | |
4580 | ||
4581 | if (waiting_for_input && !echoing) | |
4582 | quit_throw_to_read_char (); | |
4583 | ||
4584 | errno = old_errno; | |
4585 | } | |
4586 | ||
4587 | /* Handle a C-g by making read_char return C-g. */ | |
4588 | ||
4589 | quit_throw_to_read_char () | |
4590 | { | |
4591 | quit_error_check (); | |
4592 | sigfree (); | |
4593 | /* Prevent another signal from doing this before we finish. */ | |
f76475ad | 4594 | clear_waiting_for_input (); |
284f4730 JB |
4595 | input_pending = 0; |
4596 | ||
dbc4e1c1 | 4597 | unread_command_events = Qnil; |
86e5706b | 4598 | unread_command_char = -1; |
284f4730 | 4599 | |
e6b01c14 JB |
4600 | #ifdef POLL_FOR_INPUT |
4601 | /* May be > 1 if in recursive minibuffer. */ | |
4602 | if (poll_suppress_count == 0) | |
4603 | abort (); | |
4604 | #endif | |
4605 | ||
284f4730 JB |
4606 | _longjmp (getcjmp, 1); |
4607 | } | |
4608 | \f | |
4609 | DEFUN ("set-input-mode", Fset_input_mode, Sset_input_mode, 3, 4, 0, | |
4610 | "Set mode of reading keyboard input.\n\ | |
464f8898 RS |
4611 | First arg INTERRUPT non-nil means use input interrupts;\n\ |
4612 | nil means use CBREAK mode.\n\ | |
4613 | Second arg FLOW non-nil means use ^S/^Q flow control for output to terminal\n\ | |
284f4730 | 4614 | (no effect except in CBREAK mode).\n\ |
b04904fb RS |
4615 | Third arg META t means accept 8-bit input (for a Meta key).\n\ |
4616 | META nil means ignore the top bit, on the assumption it is parity.\n\ | |
4617 | Otherwise, accept 8-bit input and don't use the top bit for Meta.\n\ | |
a8ee7ef9 RS |
4618 | Optional fourth arg QUIT if non-nil specifies character to use for quitting.\n\ |
4619 | See also `current-input-mode'.") | |
284f4730 JB |
4620 | (interrupt, flow, meta, quit) |
4621 | Lisp_Object interrupt, flow, meta, quit; | |
4622 | { | |
4623 | if (!NILP (quit) | |
4624 | && (XTYPE (quit) != Lisp_Int | |
4625 | || XINT (quit) < 0 || XINT (quit) > 0400)) | |
4626 | error ("set-input-mode: QUIT must be an ASCII character."); | |
4627 | ||
4628 | reset_sys_modes (); | |
4629 | #ifdef SIGIO | |
4630 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
4631 | #ifdef NO_SOCK_SIGIO | |
4632 | if (read_socket_hook) | |
4633 | interrupt_input = 0; /* No interrupts if reading from a socket. */ | |
4634 | else | |
4635 | #endif /* NO_SOCK_SIGIO */ | |
4636 | interrupt_input = !NILP (interrupt); | |
4637 | #else /* not SIGIO */ | |
4638 | interrupt_input = 0; | |
4639 | #endif /* not SIGIO */ | |
4640 | /* Our VMS input only works by interrupts, as of now. */ | |
4641 | #ifdef VMS | |
4642 | interrupt_input = 1; | |
4643 | #endif | |
4644 | flow_control = !NILP (flow); | |
b04904fb RS |
4645 | if (NILP (meta)) |
4646 | meta_key = 0; | |
4647 | else if (EQ (meta, Qt)) | |
4648 | meta_key = 1; | |
4649 | else | |
4650 | meta_key = 2; | |
284f4730 JB |
4651 | if (!NILP (quit)) |
4652 | /* Don't let this value be out of range. */ | |
4653 | quit_char = XINT (quit) & (meta_key ? 0377 : 0177); | |
4654 | ||
4655 | init_sys_modes (); | |
4656 | return Qnil; | |
4657 | } | |
80645119 JB |
4658 | |
4659 | DEFUN ("current-input-mode", Fcurrent_input_mode, Scurrent_input_mode, 0, 0, 0, | |
4660 | "Return information about the way Emacs currently reads keyboard input.\n\ | |
4661 | The value is a list of the form (INTERRUPT FLOW META QUIT), where\n\ | |
4662 | INTERRUPT is non-nil if Emacs is using interrupt-driven input; if\n\ | |
4663 | nil, Emacs is using CBREAK mode.\n\ | |
4664 | FLOW is non-nil if Emacs uses ^S/^Q flow control for output to the\n\ | |
4665 | terminal; this does not apply if Emacs uses interrupt-driven input.\n\ | |
a8ee7ef9 RS |
4666 | META is t if accepting 8-bit input with 8th bit as Meta flag.\n\ |
4667 | META nil means ignoring the top bit, on the assumption it is parity.\n\ | |
4668 | META is neither t nor nil if accepting 8-bit input and using\n\ | |
4669 | all 8 bits as the character code.\n\ | |
80645119 JB |
4670 | QUIT is the character Emacs currently uses to quit.\n\ |
4671 | The elements of this list correspond to the arguments of\n\ | |
a8ee7ef9 | 4672 | `set-input-mode'.") |
80645119 JB |
4673 | () |
4674 | { | |
4675 | Lisp_Object val[4]; | |
4676 | ||
4677 | val[0] = interrupt_input ? Qt : Qnil; | |
4678 | val[1] = flow_control ? Qt : Qnil; | |
a8ee7ef9 | 4679 | val[2] = meta_key == 2 ? make_number (0) : meta_key == 1 ? Qt : Qnil; |
7b50ece7 | 4680 | XFASTINT (val[3]) = quit_char; |
80645119 | 4681 | |
bf673a7a | 4682 | return Flist (sizeof (val) / sizeof (val[0]), val); |
80645119 JB |
4683 | } |
4684 | ||
284f4730 JB |
4685 | \f |
4686 | init_keyboard () | |
4687 | { | |
284f4730 JB |
4688 | /* This is correct before outermost invocation of the editor loop */ |
4689 | command_loop_level = -1; | |
4690 | immediate_quit = 0; | |
4691 | quit_char = Ctl ('g'); | |
dbc4e1c1 | 4692 | unread_command_events = Qnil; |
86e5706b | 4693 | unread_command_char = -1; |
284f4730 | 4694 | total_keys = 0; |
9deb415a | 4695 | recent_keys_index = 0; |
284f4730 JB |
4696 | kbd_fetch_ptr = kbd_buffer; |
4697 | kbd_store_ptr = kbd_buffer; | |
4698 | do_mouse_tracking = 0; | |
4699 | input_pending = 0; | |
4700 | ||
07d2b8de | 4701 | #ifdef MULTI_FRAME |
8f805655 JB |
4702 | /* This means that command_loop_1 won't try to select anything the first |
4703 | time through. */ | |
3c370943 JB |
4704 | internal_last_event_frame = Qnil; |
4705 | Vlast_event_frame = internal_last_event_frame; | |
7b4aedb9 JB |
4706 | #endif |
4707 | ||
4708 | /* If we're running a dumped Emacs, we need to clear out | |
4709 | kbd_buffer_frame_or_window, in case some events got into it | |
4710 | before we dumped. | |
4bb994d1 | 4711 | |
7b4aedb9 JB |
4712 | If we're running an undumped Emacs, it hasn't been initialized by |
4713 | syms_of_keyboard yet. */ | |
4bb994d1 | 4714 | if (initialized) |
7b4aedb9 | 4715 | Ffillarray (kbd_buffer_frame_or_window, Qnil); |
07d2b8de | 4716 | |
284f4730 JB |
4717 | if (!noninteractive) |
4718 | { | |
4719 | signal (SIGINT, interrupt_signal); | |
cb5df6ae | 4720 | #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS) |
284f4730 JB |
4721 | /* For systems with SysV TERMIO, C-g is set up for both SIGINT and |
4722 | SIGQUIT and we can't tell which one it will give us. */ | |
4723 | signal (SIGQUIT, interrupt_signal); | |
4724 | #endif /* HAVE_TERMIO */ | |
4725 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
4726 | #ifdef SIGIO | |
4727 | signal (SIGIO, input_available_signal); | |
8ea0a720 | 4728 | #endif /* SIGIO */ |
284f4730 JB |
4729 | } |
4730 | ||
4731 | /* Use interrupt input by default, if it works and noninterrupt input | |
4732 | has deficiencies. */ | |
4733 | ||
4734 | #ifdef INTERRUPT_INPUT | |
4735 | interrupt_input = 1; | |
4736 | #else | |
4737 | interrupt_input = 0; | |
4738 | #endif | |
4739 | ||
4740 | /* Our VMS input only works by interrupts, as of now. */ | |
4741 | #ifdef VMS | |
4742 | interrupt_input = 1; | |
4743 | #endif | |
4744 | ||
4745 | sigfree (); | |
4746 | dribble = 0; | |
4747 | ||
4748 | if (keyboard_init_hook) | |
4749 | (*keyboard_init_hook) (); | |
4750 | ||
4751 | #ifdef POLL_FOR_INPUT | |
4752 | poll_suppress_count = 1; | |
4753 | start_polling (); | |
4754 | #endif | |
4755 | } | |
4756 | ||
4757 | /* This type's only use is in syms_of_keyboard, to initialize the | |
4758 | event header symbols and put properties on them. */ | |
4759 | struct event_head { | |
4760 | Lisp_Object *var; | |
4761 | char *name; | |
4762 | Lisp_Object *kind; | |
4763 | }; | |
4764 | ||
4765 | struct event_head head_table[] = { | |
7b4aedb9 | 4766 | &Qmouse_movement, "mouse-movement", &Qmouse_movement, |
3c370943 | 4767 | &Qscroll_bar_movement, "scroll-bar-movement", &Qmouse_movement, |
7b4aedb9 | 4768 | &Qswitch_frame, "switch-frame", &Qswitch_frame, |
284f4730 JB |
4769 | }; |
4770 | ||
4771 | syms_of_keyboard () | |
4772 | { | |
4773 | Qself_insert_command = intern ("self-insert-command"); | |
4774 | staticpro (&Qself_insert_command); | |
4775 | ||
4776 | Qforward_char = intern ("forward-char"); | |
4777 | staticpro (&Qforward_char); | |
4778 | ||
4779 | Qbackward_char = intern ("backward-char"); | |
4780 | staticpro (&Qbackward_char); | |
4781 | ||
4782 | Qdisabled = intern ("disabled"); | |
4783 | staticpro (&Qdisabled); | |
4784 | ||
86e5706b RS |
4785 | Qpre_command_hook = intern ("pre-command-hook"); |
4786 | staticpro (&Qpre_command_hook); | |
4787 | ||
4788 | Qpost_command_hook = intern ("post-command-hook"); | |
4789 | staticpro (&Qpost_command_hook); | |
4790 | ||
284f4730 JB |
4791 | Qfunction_key = intern ("function-key"); |
4792 | staticpro (&Qfunction_key); | |
13b5e56c | 4793 | Qmouse_click = intern ("mouse-click"); |
284f4730 | 4794 | staticpro (&Qmouse_click); |
284f4730 | 4795 | |
598a9fa7 JB |
4796 | Qmenu_enable = intern ("menu-enable"); |
4797 | staticpro (&Qmenu_enable); | |
4798 | ||
284f4730 JB |
4799 | Qmode_line = intern ("mode-line"); |
4800 | staticpro (&Qmode_line); | |
e5d77022 JB |
4801 | Qvertical_line = intern ("vertical-line"); |
4802 | staticpro (&Qvertical_line); | |
3c370943 JB |
4803 | Qvertical_scroll_bar = intern ("vertical-scroll-bar"); |
4804 | staticpro (&Qvertical_scroll_bar); | |
5ec75a55 RS |
4805 | Qmenu_bar = intern ("menu-bar"); |
4806 | staticpro (&Qmenu_bar); | |
4bb994d1 JB |
4807 | |
4808 | Qabove_handle = intern ("above-handle"); | |
4809 | staticpro (&Qabove_handle); | |
4810 | Qhandle = intern ("handle"); | |
4811 | staticpro (&Qhandle); | |
4812 | Qbelow_handle = intern ("below-handle"); | |
4813 | staticpro (&Qbelow_handle); | |
284f4730 | 4814 | |
cd21b839 | 4815 | Qevent_kind = intern ("event-kind"); |
284f4730 | 4816 | staticpro (&Qevent_kind); |
88cb0656 JB |
4817 | Qevent_symbol_elements = intern ("event-symbol-elements"); |
4818 | staticpro (&Qevent_symbol_elements); | |
0a7f1fc0 JB |
4819 | Qevent_symbol_element_mask = intern ("event-symbol-element-mask"); |
4820 | staticpro (&Qevent_symbol_element_mask); | |
4821 | Qmodifier_cache = intern ("modifier-cache"); | |
4822 | staticpro (&Qmodifier_cache); | |
284f4730 | 4823 | |
48e416d4 RS |
4824 | Qrecompute_lucid_menubar = intern ("recompute-lucid-menubar"); |
4825 | staticpro (&Qrecompute_lucid_menubar); | |
4826 | Qactivate_menubar_hook = intern ("activate-menubar-hook"); | |
4827 | staticpro (&Qactivate_menubar_hook); | |
4828 | ||
284f4730 JB |
4829 | { |
4830 | struct event_head *p; | |
4831 | ||
4832 | for (p = head_table; | |
4833 | p < head_table + (sizeof (head_table) / sizeof (head_table[0])); | |
4834 | p++) | |
4835 | { | |
4836 | *p->var = intern (p->name); | |
4837 | staticpro (p->var); | |
4838 | Fput (*p->var, Qevent_kind, *p->kind); | |
88cb0656 | 4839 | Fput (*p->var, Qevent_symbol_elements, Fcons (*p->var, Qnil)); |
284f4730 JB |
4840 | } |
4841 | } | |
4842 | ||
7b4aedb9 JB |
4843 | button_down_location = Fmake_vector (make_number (NUM_MOUSE_BUTTONS), Qnil); |
4844 | staticpro (&button_down_location); | |
88cb0656 JB |
4845 | |
4846 | { | |
4847 | int i; | |
4848 | int len = sizeof (modifier_names) / sizeof (modifier_names[0]); | |
4849 | ||
4850 | modifier_symbols = Fmake_vector (make_number (len), Qnil); | |
4851 | for (i = 0; i < len; i++) | |
86e5706b RS |
4852 | if (modifier_names[i]) |
4853 | XVECTOR (modifier_symbols)->contents[i] = intern (modifier_names[i]); | |
88cb0656 JB |
4854 | staticpro (&modifier_symbols); |
4855 | } | |
4856 | ||
9deb415a JB |
4857 | recent_keys = Fmake_vector (make_number (NUM_RECENT_KEYS), Qnil); |
4858 | staticpro (&recent_keys); | |
4859 | ||
6569cc8d | 4860 | this_command_keys = Fmake_vector (make_number (40), Qnil); |
715d9345 | 4861 | staticpro (&this_command_keys); |
6569cc8d | 4862 | |
7b4aedb9 JB |
4863 | kbd_buffer_frame_or_window |
4864 | = Fmake_vector (make_number (KBD_BUFFER_SIZE), Qnil); | |
4865 | staticpro (&kbd_buffer_frame_or_window); | |
4bb994d1 | 4866 | |
284f4730 JB |
4867 | func_key_syms = Qnil; |
4868 | staticpro (&func_key_syms); | |
4869 | ||
4870 | mouse_syms = Qnil; | |
4871 | staticpro (&mouse_syms); | |
4872 | ||
cd21b839 JB |
4873 | unread_switch_frame = Qnil; |
4874 | staticpro (&unread_switch_frame); | |
4875 | ||
284f4730 JB |
4876 | defsubr (&Sread_key_sequence); |
4877 | defsubr (&Srecursive_edit); | |
4878 | defsubr (&Strack_mouse); | |
284f4730 JB |
4879 | defsubr (&Sinput_pending_p); |
4880 | defsubr (&Scommand_execute); | |
4881 | defsubr (&Srecent_keys); | |
4882 | defsubr (&Sthis_command_keys); | |
4883 | defsubr (&Ssuspend_emacs); | |
4884 | defsubr (&Sabort_recursive_edit); | |
4885 | defsubr (&Sexit_recursive_edit); | |
4886 | defsubr (&Srecursion_depth); | |
4887 | defsubr (&Stop_level); | |
4888 | defsubr (&Sdiscard_input); | |
4889 | defsubr (&Sopen_dribble_file); | |
4890 | defsubr (&Sset_input_mode); | |
80645119 | 4891 | defsubr (&Scurrent_input_mode); |
284f4730 JB |
4892 | defsubr (&Sexecute_extended_command); |
4893 | ||
4894 | DEFVAR_LISP ("disabled-command-hook", &Vdisabled_command_hook, | |
4895 | "Value is called instead of any command that is disabled\n\ | |
7d6de002 | 4896 | \(has a non-nil `disabled' property)."); |
284f4730 JB |
4897 | |
4898 | DEFVAR_LISP ("last-command-char", &last_command_char, | |
86e5706b RS |
4899 | "Last input event that was part of a command."); |
4900 | ||
4901 | DEFVAR_LISP ("last-command-event", &last_command_char, | |
4902 | "Last input event that was part of a command."); | |
284f4730 | 4903 | |
7d6de002 | 4904 | DEFVAR_LISP ("last-nonmenu-event", &last_nonmenu_event, |
86e5706b | 4905 | "Last input event in a command, except for mouse menu events.\n\ |
7d6de002 RS |
4906 | Mouse menus give back keys that don't look like mouse events;\n\ |
4907 | this variable holds the actual mouse event that led to the menu,\n\ | |
4908 | so that you can determine whether the command was run by mouse or not."); | |
4909 | ||
284f4730 | 4910 | DEFVAR_LISP ("last-input-char", &last_input_char, |
86e5706b RS |
4911 | "Last input event."); |
4912 | ||
4913 | DEFVAR_LISP ("last-input-event", &last_input_char, | |
4914 | "Last input event."); | |
284f4730 | 4915 | |
dbc4e1c1 | 4916 | DEFVAR_LISP ("unread-command-events", &unread_command_events, |
1c07d0a6 | 4917 | "List of objects to be read as next command input events."); |
284f4730 | 4918 | |
86e5706b RS |
4919 | DEFVAR_INT ("unread-command-char", &unread_command_char, |
4920 | "If not -1, an object to be read as next command input event."); | |
4921 | ||
284f4730 JB |
4922 | DEFVAR_LISP ("meta-prefix-char", &meta_prefix_char, |
4923 | "Meta-prefix character code. Meta-foo as command input\n\ | |
4924 | turns into this character followed by foo."); | |
4925 | XSET (meta_prefix_char, Lisp_Int, 033); | |
4926 | ||
4927 | DEFVAR_LISP ("last-command", &last_command, | |
4928 | "The last command executed. Normally a symbol with a function definition,\n\ | |
4929 | but can be whatever was found in the keymap, or whatever the variable\n\ | |
4930 | `this-command' was set to by that command."); | |
4931 | last_command = Qnil; | |
4932 | ||
4933 | DEFVAR_LISP ("this-command", &this_command, | |
4934 | "The command now being executed.\n\ | |
4935 | The command can set this variable; whatever is put here\n\ | |
4936 | will be in `last-command' during the following command."); | |
4937 | this_command = Qnil; | |
4938 | ||
4939 | DEFVAR_INT ("auto-save-interval", &auto_save_interval, | |
4940 | "*Number of keyboard input characters between auto-saves.\n\ | |
4941 | Zero means disable autosaving due to number of characters typed."); | |
4942 | auto_save_interval = 300; | |
4943 | ||
4944 | DEFVAR_LISP ("auto-save-timeout", &Vauto_save_timeout, | |
4945 | "*Number of seconds idle time before auto-save.\n\ | |
06ef7355 RS |
4946 | Zero or nil means disable auto-saving due to idleness.\n\ |
4947 | After auto-saving due to this many seconds of idle time,\n\ | |
84447c71 | 4948 | Emacs also does a garbage collection if that seems to be warranted."); |
284f4730 JB |
4949 | XFASTINT (Vauto_save_timeout) = 30; |
4950 | ||
4951 | DEFVAR_INT ("echo-keystrokes", &echo_keystrokes, | |
4952 | "*Nonzero means echo unfinished commands after this many seconds of pause."); | |
4953 | echo_keystrokes = 1; | |
4954 | ||
4955 | DEFVAR_INT ("polling-period", &polling_period, | |
4956 | "*Interval between polling for input during Lisp execution.\n\ | |
4957 | The reason for polling is to make C-g work to stop a running program.\n\ | |
4958 | Polling is needed only when using X windows and SIGIO does not work.\n\ | |
4959 | Polling is automatically disabled in all other cases."); | |
4960 | polling_period = 2; | |
4961 | ||
4962 | DEFVAR_INT ("num-input-keys", &num_input_keys, | |
4963 | "*Number of complete keys read from the keyboard so far."); | |
4964 | num_input_keys = 0; | |
4965 | ||
07d2b8de | 4966 | #ifdef MULTI_FRAME |
ff11dfa1 | 4967 | DEFVAR_LISP ("last-event-frame", &Vlast_event_frame, |
fce33686 JB |
4968 | "*The frame in which the most recently read event occurred.\n\ |
4969 | If the last event came from a keyboard macro, this is set to `macro'."); | |
ff11dfa1 | 4970 | Vlast_event_frame = Qnil; |
07d2b8de | 4971 | #endif |
284f4730 JB |
4972 | |
4973 | DEFVAR_LISP ("help-char", &help_char, | |
4974 | "Character to recognize as meaning Help.\n\ | |
4975 | When it is read, do `(eval help-form)', and display result if it's a string.\n\ | |
4976 | If the value of `help-form' is nil, this char can be read normally."); | |
4977 | XSET (help_char, Lisp_Int, Ctl ('H')); | |
4978 | ||
4979 | DEFVAR_LISP ("help-form", &Vhelp_form, | |
4980 | "Form to execute when character help-char is read.\n\ | |
4981 | If the form returns a string, that string is displayed.\n\ | |
4982 | If `help-form' is nil, the help char is not recognized."); | |
4983 | Vhelp_form = Qnil; | |
4984 | ||
4985 | DEFVAR_LISP ("top-level", &Vtop_level, | |
4986 | "Form to evaluate when Emacs starts up.\n\ | |
4987 | Useful to set before you dump a modified Emacs."); | |
4988 | Vtop_level = Qnil; | |
4989 | ||
4990 | DEFVAR_LISP ("keyboard-translate-table", &Vkeyboard_translate_table, | |
4991 | "String used as translate table for keyboard input, or nil.\n\ | |
4992 | Each character is looked up in this string and the contents used instead.\n\ | |
4993 | If string is of length N, character codes N and up are untranslated."); | |
4994 | Vkeyboard_translate_table = Qnil; | |
4995 | ||
284f4730 | 4996 | DEFVAR_BOOL ("menu-prompting", &menu_prompting, |
7d6de002 | 4997 | "Non-nil means prompt with menus when appropriate.\n\ |
284f4730 | 4998 | This is done when reading from a keymap that has a prompt string,\n\ |
7d6de002 RS |
4999 | for elements that have prompt strings.\n\ |
5000 | The menu is displayed on the screen\n\ | |
5001 | if X menus were enabled at configuration\n\ | |
5002 | time and the previous event was a mouse click prefix key.\n\ | |
5003 | Otherwise, menu prompting uses the echo area."); | |
284f4730 JB |
5004 | menu_prompting = 1; |
5005 | ||
5006 | DEFVAR_LISP ("menu-prompt-more-char", &menu_prompt_more_char, | |
5007 | "Character to see next line of menu prompt.\n\ | |
5008 | Type this character while in a menu prompt to rotate around the lines of it."); | |
5009 | XSET (menu_prompt_more_char, Lisp_Int, ' '); | |
9fa4395d RS |
5010 | |
5011 | DEFVAR_INT ("extra-keyboard-modifiers", &extra_keyboard_modifiers, | |
5012 | "A mask of additional modifier keys to use with every keyboard character.\n\ | |
ad163903 JB |
5013 | Emacs applies the modifiers of the character stored here to each keyboard\n\ |
5014 | character it reads. For example, after evaluating the expression\n\ | |
80645119 JB |
5015 | (setq extra-keyboard-modifiers ?\C-x)\n\ |
5016 | all input characters will have the control modifier applied to them.\n\ | |
5017 | \n\ | |
5018 | Note that the character ?\C-@, equivalent to the integer zero, does\n\ | |
5019 | not count as a control character; rather, it counts as a character\n\ | |
5020 | with no modifiers; thus, setting extra_keyboard_modifiers to zero\n\ | |
5021 | cancels any modification."); | |
9fa4395d | 5022 | extra_keyboard_modifiers = 0; |
86e5706b RS |
5023 | |
5024 | DEFVAR_LISP ("deactivate-mark", &Vdeactivate_mark, | |
5025 | "If an editing command sets this to t, deactivate the mark afterward.\n\ | |
5026 | The command loop sets this to nil before each command,\n\ | |
5027 | and tests the value when the command returns.\n\ | |
5028 | Buffer modification stores t in this variable."); | |
5029 | Vdeactivate_mark = Qnil; | |
5030 | ||
5031 | DEFVAR_LISP ("pre-command-hook", &Vpre_command_hook, | |
5032 | "Normal hook run before each command is executed."); | |
5033 | Vpre_command_hook = Qnil; | |
5034 | ||
5035 | DEFVAR_LISP ("post-command-hook", &Vpost_command_hook, | |
5036 | "Normal hook run before each command is executed."); | |
5037 | Vpost_command_hook = Qnil; | |
48e416d4 RS |
5038 | |
5039 | DEFVAR_LISP ("lucid-menu-bar-dirty-flag", &Vlucid_menu_bar_dirty_flag, | |
5040 | "t means menu bar, specified Lucid style, needs to be recomputed."); | |
5041 | Vlucid_menu_bar_dirty_flag = Qnil; | |
284f4730 JB |
5042 | } |
5043 | ||
5044 | keys_of_keyboard () | |
5045 | { | |
5046 | initial_define_key (global_map, Ctl ('Z'), "suspend-emacs"); | |
5047 | initial_define_key (control_x_map, Ctl ('Z'), "suspend-emacs"); | |
5048 | initial_define_key (meta_map, Ctl ('C'), "exit-recursive-edit"); | |
5049 | initial_define_key (global_map, Ctl (']'), "abort-recursive-edit"); | |
5050 | initial_define_key (meta_map, 'x', "execute-extended-command"); | |
5051 | } |