Commit | Line | Data |
---|---|---|
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. */ | |
2e894dab | 87 | Lisp_Object Qdisabled, Qdisabled_command_hook; |
284f4730 JB |
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. */ | |
7e85b935 | 125 | Lisp_Object Vhelp_char; |
284f4730 JB |
126 | |
127 | /* Form to execute when help char is typed. */ | |
128 | Lisp_Object Vhelp_form; | |
129 | ||
7e85b935 RS |
130 | /* Command to run when the help character follows a prefix key. */ |
131 | Lisp_Object Vprefix_help_command; | |
132 | ||
a73c5e29 RS |
133 | /* Keymap for items that appear at end of menu bar. */ |
134 | Lisp_Object Vhelp_menu_bar_map; | |
135 | ||
284f4730 JB |
136 | /* Character that causes a quit. Normally C-g. |
137 | ||
138 | If we are running on an ordinary terminal, this must be an ordinary | |
139 | ASCII char, since we want to make it our interrupt character. | |
140 | ||
141 | If we are not running on an ordinary terminal, it still needs to be | |
142 | an ordinary ASCII char. This character needs to be recognized in | |
143 | the input interrupt handler. At this point, the keystroke is | |
144 | represented as a struct input_event, while the desired quit | |
145 | character is specified as a lispy event. The mapping from struct | |
146 | input_events to lispy events cannot run in an interrupt handler, | |
147 | and the reverse mapping is difficult for anything but ASCII | |
148 | keystrokes. | |
149 | ||
150 | FOR THESE ELABORATE AND UNSATISFYING REASONS, quit_char must be an | |
151 | ASCII character. */ | |
152 | int quit_char; | |
153 | ||
154 | extern Lisp_Object current_global_map; | |
155 | extern int minibuf_level; | |
156 | ||
157 | /* Current depth in recursive edits. */ | |
158 | int command_loop_level; | |
159 | ||
160 | /* Total number of times command_loop has read a key sequence. */ | |
161 | int num_input_keys; | |
162 | ||
163 | /* Last input character read as a command. */ | |
164 | Lisp_Object last_command_char; | |
165 | ||
7d6de002 RS |
166 | /* Last input character read as a command, not counting menus |
167 | reached by the mouse. */ | |
168 | Lisp_Object last_nonmenu_event; | |
169 | ||
284f4730 JB |
170 | /* Last input character read for any purpose. */ |
171 | Lisp_Object last_input_char; | |
172 | ||
dbc4e1c1 JB |
173 | /* If not Qnil, a list of objects to be read as subsequent command input. */ |
174 | Lisp_Object unread_command_events; | |
284f4730 | 175 | |
86e5706b RS |
176 | /* If not -1, an event to be read as subsequent command input. */ |
177 | int unread_command_char; | |
178 | ||
cd21b839 JB |
179 | /* If not Qnil, this is a switch-frame event which we decided to put |
180 | off until the end of a key sequence. This should be read as the | |
dbc4e1c1 | 181 | next command input, after any unread_command_events. |
8f805655 JB |
182 | |
183 | read_key_sequence uses this to delay switch-frame events until the | |
184 | end of the key sequence; Fread_char uses it to put off switch-frame | |
185 | events until a non-ASCII event is acceptable as input. */ | |
186 | Lisp_Object unread_switch_frame; | |
cd21b839 | 187 | |
9fa4395d RS |
188 | /* A mask of extra modifier bits to put into every keyboard char. */ |
189 | int extra_keyboard_modifiers; | |
190 | ||
284f4730 JB |
191 | /* Char to use as prefix when a meta character is typed in. |
192 | This is bound on entry to minibuffer in case ESC is changed there. */ | |
193 | ||
194 | Lisp_Object meta_prefix_char; | |
195 | ||
196 | /* Last size recorded for a current buffer which is not a minibuffer. */ | |
197 | static int last_non_minibuf_size; | |
198 | ||
06ef7355 | 199 | /* Number of idle seconds before an auto-save and garbage collection. */ |
284f4730 JB |
200 | static Lisp_Object Vauto_save_timeout; |
201 | ||
202 | /* Total number of times read_char has returned. */ | |
203 | int num_input_chars; | |
204 | ||
51172b6d RS |
205 | /* Total number of times read_char has returned, outside of macros. */ |
206 | int num_nonmacro_input_chars; | |
207 | ||
284f4730 JB |
208 | /* Auto-save automatically when this many characters have been typed |
209 | since the last time. */ | |
210 | ||
211 | static int auto_save_interval; | |
212 | ||
51172b6d | 213 | /* Value of num_nonmacro_input_chars as of last auto save. */ |
284f4730 JB |
214 | |
215 | int last_auto_save; | |
216 | ||
217 | /* Last command executed by the editor command loop, not counting | |
218 | commands that set the prefix argument. */ | |
219 | ||
220 | Lisp_Object last_command; | |
221 | ||
222 | /* The command being executed by the command loop. | |
223 | Commands may set this, and the value set will be copied into last_command | |
224 | instead of the actual command. */ | |
225 | Lisp_Object this_command; | |
226 | ||
07d2b8de | 227 | #ifdef MULTI_FRAME |
fce33686 | 228 | /* The frame in which the last input event occurred, or Qmacro if the |
3c370943 JB |
229 | last event came from a macro. We use this to determine when to |
230 | generate switch-frame events. This may be cleared by functions | |
231 | like Fselect_frame, to make sure that a switch-frame event is | |
232 | generated by the next character. */ | |
233 | Lisp_Object internal_last_event_frame; | |
234 | ||
235 | /* A user-visible version of the above, intended to allow users to | |
236 | figure out where the last event came from, if the event doesn't | |
237 | carry that information itself (i.e. if it was a character). */ | |
ff11dfa1 | 238 | Lisp_Object Vlast_event_frame; |
07d2b8de | 239 | #endif |
284f4730 | 240 | |
1113d9db JB |
241 | /* The timestamp of the last input event we received from the X server. |
242 | X Windows wants this for selection ownership. */ | |
284f4730 JB |
243 | unsigned long last_event_timestamp; |
244 | ||
245 | Lisp_Object Qself_insert_command; | |
246 | Lisp_Object Qforward_char; | |
247 | Lisp_Object Qbackward_char; | |
e58aa385 | 248 | Lisp_Object Qundefined; |
284f4730 JB |
249 | |
250 | /* read_key_sequence stores here the command definition of the | |
251 | key sequence that it reads. */ | |
252 | Lisp_Object read_key_sequence_cmd; | |
253 | ||
254 | /* Form to evaluate (if non-nil) when Emacs is started. */ | |
255 | Lisp_Object Vtop_level; | |
256 | ||
257 | /* User-supplied string to translate input characters through. */ | |
258 | Lisp_Object Vkeyboard_translate_table; | |
259 | ||
260 | /* Keymap mapping ASCII function key sequences onto their preferred forms. */ | |
261 | extern Lisp_Object Vfunction_key_map; | |
262 | ||
86e5706b RS |
263 | /* Non-nil means deactivate the mark at end of this command. */ |
264 | Lisp_Object Vdeactivate_mark; | |
265 | ||
48e416d4 RS |
266 | /* Menu bar specified in Lucid Emacs fashion. */ |
267 | ||
268 | Lisp_Object Vlucid_menu_bar_dirty_flag; | |
269 | Lisp_Object Qrecompute_lucid_menubar, Qactivate_menubar_hook; | |
270 | ||
86e5706b RS |
271 | /* Hooks to run before and after each command. */ |
272 | Lisp_Object Qpre_command_hook, Qpost_command_hook; | |
273 | Lisp_Object Vpre_command_hook, Vpost_command_hook; | |
274 | ||
284f4730 JB |
275 | /* File in which we write all commands we read. */ |
276 | FILE *dribble; | |
277 | ||
278 | /* Nonzero if input is available. */ | |
279 | int input_pending; | |
280 | ||
b04904fb RS |
281 | /* 1 if should obey 0200 bit in input chars as "Meta", 2 if should |
282 | keep 0200 bit in input chars. 0 to ignore the 0200 bit. */ | |
283 | ||
284f4730 JB |
284 | int meta_key; |
285 | ||
286 | extern char *pending_malloc_warning; | |
287 | ||
288 | /* Circular buffer for pre-read keyboard input. */ | |
289 | static struct input_event kbd_buffer[KBD_BUFFER_SIZE]; | |
290 | ||
7b4aedb9 | 291 | /* Vector to GCPRO the frames and windows mentioned in kbd_buffer. |
4bb994d1 | 292 | |
7b4aedb9 JB |
293 | The interrupt-level event handlers will never enqueue an event on a |
294 | frame which is not in Vframe_list, and once an event is dequeued, | |
3c370943 JB |
295 | internal_last_event_frame or the event itself points to the frame. |
296 | So that's all fine. | |
4bb994d1 JB |
297 | |
298 | But while the event is sitting in the queue, it's completely | |
299 | unprotected. Suppose the user types one command which will run for | |
300 | a while and then delete a frame, and then types another event at | |
301 | the frame that will be deleted, before the command gets around to | |
302 | it. Suppose there are no references to this frame elsewhere in | |
303 | Emacs, and a GC occurs before the second event is dequeued. Now we | |
304 | have an event referring to a freed frame, which will crash Emacs | |
305 | when it is dequeued. | |
306 | ||
3c370943 | 307 | Similar things happen when an event on a scroll bar is enqueued; the |
7b4aedb9 | 308 | window may be deleted while the event is in the queue. |
4bb994d1 | 309 | |
7b4aedb9 JB |
310 | So, we use this vector to protect the frame_or_window field in the |
311 | event queue. That way, they'll be dequeued as dead frames or | |
312 | windows, but still valid lisp objects. | |
313 | ||
314 | If kbd_buffer[i].kind != no_event, then | |
315 | (XVECTOR (kbd_buffer_frame_or_window)->contents[i] | |
316 | == kbd_buffer[i].frame_or_window. */ | |
317 | static Lisp_Object kbd_buffer_frame_or_window; | |
4bb994d1 | 318 | |
284f4730 JB |
319 | /* Pointer to next available character in kbd_buffer. |
320 | If kbd_fetch_ptr == kbd_store_ptr, the buffer is empty. | |
321 | This may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the the | |
322 | next available char is in kbd_buffer[0]. */ | |
323 | static struct input_event *kbd_fetch_ptr; | |
324 | ||
325 | /* Pointer to next place to store character in kbd_buffer. This | |
326 | may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the next | |
327 | character should go in kbd_buffer[0]. */ | |
ff0b5f4c JB |
328 | #ifdef __STDC__ |
329 | volatile | |
330 | #endif | |
284f4730 JB |
331 | static struct input_event *kbd_store_ptr; |
332 | ||
333 | /* The above pair of variables forms a "queue empty" flag. When we | |
334 | enqueue a non-hook event, we increment kbd_write_count. When we | |
335 | dequeue a non-hook event, we increment kbd_read_count. We say that | |
4bb994d1 | 336 | there is input available iff the two counters are not equal. |
284f4730 JB |
337 | |
338 | Why not just have a flag set and cleared by the enqueuing and | |
339 | dequeuing functions? Such a flag could be screwed up by interrupts | |
340 | at inopportune times. */ | |
341 | ||
663258f2 | 342 | /* If this flag is non-zero, we check mouse_moved to see when the |
4bb994d1 | 343 | mouse moves, and motion events will appear in the input stream. If |
663258f2 JB |
344 | it is zero, mouse motion is ignored. */ |
345 | static int do_mouse_tracking; | |
284f4730 JB |
346 | |
347 | /* The window system handling code should set this if the mouse has | |
348 | moved since the last call to the mouse_position_hook. Calling that | |
349 | hook should clear this. Code assumes that if this is set, it can | |
350 | call mouse_position_hook to get the promised position, so don't set | |
351 | it unless you're prepared to substantiate the claim! */ | |
352 | int mouse_moved; | |
353 | ||
354 | /* True iff there is an event in kbd_buffer, or if mouse tracking is | |
355 | enabled and there is a new mouse position in the mouse movement | |
356 | buffer. Note that if this is false, that doesn't mean that there | |
357 | is readable input; all the events in the queue might be button-up | |
358 | events, and do_mouse_tracking might be off. */ | |
359 | #define EVENT_QUEUES_EMPTY \ | |
360 | ((kbd_fetch_ptr == kbd_store_ptr) && (!do_mouse_tracking || !mouse_moved)) | |
361 | ||
362 | ||
363 | /* Symbols to head events. */ | |
364 | Lisp_Object Qmouse_movement; | |
3c370943 | 365 | Lisp_Object Qscroll_bar_movement; |
cd21b839 JB |
366 | Lisp_Object Qswitch_frame; |
367 | ||
284f4730 JB |
368 | /* Symbols to denote kinds of events. */ |
369 | Lisp_Object Qfunction_key; | |
370 | Lisp_Object Qmouse_click; | |
371 | /* Lisp_Object Qmouse_movement; - also an event header */ | |
284f4730 JB |
372 | |
373 | /* Properties of event headers. */ | |
374 | Lisp_Object Qevent_kind; | |
88cb0656 | 375 | Lisp_Object Qevent_symbol_elements; |
284f4730 | 376 | |
598a9fa7 JB |
377 | Lisp_Object Qmenu_enable; |
378 | ||
0a7f1fc0 JB |
379 | /* An event header symbol HEAD may have a property named |
380 | Qevent_symbol_element_mask, which is of the form (BASE MODIFIERS); | |
381 | BASE is the base, unmodified version of HEAD, and MODIFIERS is the | |
382 | mask of modifiers applied to it. If present, this is used to help | |
383 | speed up parse_modifiers. */ | |
384 | Lisp_Object Qevent_symbol_element_mask; | |
385 | ||
386 | /* An unmodified event header BASE may have a property named | |
387 | Qmodifier_cache, which is an alist mapping modifier masks onto | |
388 | modified versions of BASE. If present, this helps speed up | |
389 | apply_modifiers. */ | |
390 | Lisp_Object Qmodifier_cache; | |
391 | ||
5ec75a55 | 392 | /* Symbols to use for parts of windows. */ |
284f4730 | 393 | Lisp_Object Qmode_line; |
e5d77022 | 394 | Lisp_Object Qvertical_line; |
3c370943 | 395 | Lisp_Object Qvertical_scroll_bar; |
5ec75a55 RS |
396 | Lisp_Object Qmenu_bar; |
397 | ||
398 | extern Lisp_Object Qmenu_enable; | |
284f4730 | 399 | |
f4255cd1 JB |
400 | Lisp_Object recursive_edit_unwind (), command_loop (); |
401 | Lisp_Object Fthis_command_keys (); | |
284f4730 | 402 | |
ffd56f97 JB |
403 | /* Address (if not 0) of EMACS_TIME to zero out if a SIGIO interrupt |
404 | happens. */ | |
405 | EMACS_TIME *input_available_clear_time; | |
284f4730 JB |
406 | |
407 | /* Nonzero means use SIGIO interrupts; zero means use CBREAK mode. | |
408 | Default is 1 if INTERRUPT_INPUT is defined. */ | |
409 | int interrupt_input; | |
410 | ||
411 | /* Nonzero while interrupts are temporarily deferred during redisplay. */ | |
412 | int interrupts_deferred; | |
413 | ||
414 | /* nonzero means use ^S/^Q for flow control. */ | |
415 | int flow_control; | |
416 | ||
284f4730 JB |
417 | /* Allow m- file to inhibit use of FIONREAD. */ |
418 | #ifdef BROKEN_FIONREAD | |
419 | #undef FIONREAD | |
420 | #endif | |
421 | ||
422 | /* We are unable to use interrupts if FIONREAD is not available, | |
423 | so flush SIGIO so we won't try. */ | |
424 | #ifndef FIONREAD | |
425 | #ifdef SIGIO | |
426 | #undef SIGIO | |
427 | #endif | |
428 | #endif | |
429 | ||
430 | /* If we support X Windows, and won't get an interrupt when input | |
431 | arrives from the server, poll periodically so we can detect C-g. */ | |
432 | #ifdef HAVE_X_WINDOWS | |
433 | #ifndef SIGIO | |
434 | #define POLL_FOR_INPUT | |
435 | #endif | |
436 | #endif | |
437 | \f | |
438 | /* Global variable declarations. */ | |
439 | ||
440 | /* Function for init_keyboard to call with no args (if nonzero). */ | |
441 | void (*keyboard_init_hook) (); | |
442 | ||
443 | static int read_avail_input (); | |
444 | static void get_input_pending (); | |
7617111f | 445 | static Lisp_Object read_char_menu_prompt (); |
284f4730 JB |
446 | |
447 | /* > 0 if we are to echo keystrokes. */ | |
448 | static int echo_keystrokes; | |
449 | ||
450 | /* Nonzero means echo each character as typed. */ | |
451 | static int immediate_echo; | |
452 | ||
453 | /* The text we're echoing in the modeline - partial key sequences, | |
f4255cd1 JB |
454 | usually. '\0'-terminated. This really shouldn't have a fixed size. */ |
455 | static char echobuf[300]; | |
284f4730 JB |
456 | |
457 | /* Where to append more text to echobuf if we want to. */ | |
458 | static char *echoptr; | |
459 | ||
460 | #define min(a,b) ((a)<(b)?(a):(b)) | |
461 | #define max(a,b) ((a)>(b)?(a):(b)) | |
462 | ||
463 | /* Install the string STR as the beginning of the string of echoing, | |
464 | so that it serves as a prompt for the next character. | |
465 | Also start echoing. */ | |
466 | ||
467 | echo_prompt (str) | |
468 | char *str; | |
469 | { | |
470 | int len = strlen (str); | |
471 | if (len > sizeof echobuf - 4) | |
472 | len = sizeof echobuf - 4; | |
0a7f1fc0 | 473 | bcopy (str, echobuf, len); |
284f4730 | 474 | echoptr = echobuf + len; |
0a7f1fc0 | 475 | *echoptr = '\0'; |
284f4730 JB |
476 | |
477 | echo (); | |
478 | } | |
479 | ||
480 | /* Add C to the echo string, if echoing is going on. | |
481 | C can be a character, which is printed prettily ("M-C-x" and all that | |
482 | jazz), or a symbol, whose name is printed. */ | |
483 | ||
484 | echo_char (c) | |
485 | Lisp_Object c; | |
486 | { | |
487 | extern char *push_key_description (); | |
488 | ||
489 | if (immediate_echo) | |
490 | { | |
491 | char *ptr = echoptr; | |
492 | ||
493 | if (ptr != echobuf) | |
494 | *ptr++ = ' '; | |
495 | ||
496 | /* If someone has passed us a composite event, use its head symbol. */ | |
88cb0656 | 497 | c = EVENT_HEAD (c); |
284f4730 JB |
498 | |
499 | if (XTYPE (c) == Lisp_Int) | |
500 | { | |
501 | if (ptr - echobuf > sizeof echobuf - 6) | |
502 | return; | |
503 | ||
cb5df6ae | 504 | ptr = push_key_description (XINT (c), ptr); |
284f4730 JB |
505 | } |
506 | else if (XTYPE (c) == Lisp_Symbol) | |
507 | { | |
508 | struct Lisp_String *name = XSYMBOL (c)->name; | |
509 | if (((ptr - echobuf) + name->size + 4) > sizeof echobuf) | |
510 | return; | |
511 | bcopy (name->data, ptr, name->size); | |
512 | ptr += name->size; | |
513 | } | |
514 | ||
7e85b935 | 515 | if (echoptr == echobuf && EQ (c, Vhelp_char)) |
284f4730 JB |
516 | { |
517 | strcpy (ptr, " (Type ? for further options)"); | |
518 | ptr += strlen (ptr); | |
519 | } | |
520 | ||
521 | *ptr = 0; | |
522 | echoptr = ptr; | |
523 | ||
524 | echo (); | |
525 | } | |
526 | } | |
527 | ||
528 | /* Temporarily add a dash to the end of the echo string if it's not | |
529 | empty, so that it serves as a mini-prompt for the very next character. */ | |
530 | ||
531 | echo_dash () | |
532 | { | |
533 | if (!immediate_echo && echoptr == echobuf) | |
534 | return; | |
4bafa972 JB |
535 | /* Do nothing if not echoing at all. */ |
536 | if (echoptr == 0) | |
537 | return; | |
284f4730 JB |
538 | |
539 | /* Put a dash at the end of the buffer temporarily, | |
540 | but make it go away when the next character is added. */ | |
541 | echoptr[0] = '-'; | |
542 | echoptr[1] = 0; | |
543 | ||
544 | echo (); | |
545 | } | |
546 | ||
547 | /* Display the current echo string, and begin echoing if not already | |
548 | doing so. */ | |
549 | ||
550 | echo () | |
551 | { | |
552 | if (!immediate_echo) | |
553 | { | |
554 | int i; | |
555 | immediate_echo = 1; | |
556 | ||
557 | for (i = 0; i < this_command_key_count; i++) | |
6569cc8d | 558 | echo_char (XVECTOR (this_command_keys)->contents[i]); |
284f4730 JB |
559 | echo_dash (); |
560 | } | |
561 | ||
562 | echoing = 1; | |
563 | message1 (echobuf); | |
564 | echoing = 0; | |
565 | ||
566 | if (waiting_for_input && !NILP (Vquit_flag)) | |
567 | quit_throw_to_read_char (); | |
568 | } | |
569 | ||
570 | /* Turn off echoing, for the start of a new command. */ | |
571 | ||
572 | cancel_echoing () | |
573 | { | |
574 | immediate_echo = 0; | |
575 | echoptr = echobuf; | |
576 | } | |
577 | ||
578 | /* Return the length of the current echo string. */ | |
579 | ||
580 | static int | |
581 | echo_length () | |
582 | { | |
583 | return echoptr - echobuf; | |
584 | } | |
585 | ||
586 | /* Truncate the current echo message to its first LEN chars. | |
587 | This and echo_char get used by read_key_sequence when the user | |
ff11dfa1 | 588 | switches frames while entering a key sequence. */ |
284f4730 JB |
589 | |
590 | static void | |
591 | echo_truncate (len) | |
592 | int len; | |
593 | { | |
594 | echobuf[len] = '\0'; | |
0a7f1fc0 | 595 | echoptr = echobuf + len; |
284f4730 JB |
596 | } |
597 | ||
598 | \f | |
599 | /* Functions for manipulating this_command_keys. */ | |
600 | static void | |
601 | add_command_key (key) | |
602 | Lisp_Object key; | |
603 | { | |
6569cc8d JB |
604 | int size = XVECTOR (this_command_keys)->size; |
605 | ||
606 | if (this_command_key_count >= size) | |
284f4730 | 607 | { |
6569cc8d JB |
608 | Lisp_Object new_keys = Fmake_vector (make_number (size * 2), Qnil); |
609 | ||
610 | bcopy (XVECTOR (this_command_keys)->contents, | |
611 | XVECTOR (new_keys)->contents, | |
8f805655 | 612 | size * sizeof (Lisp_Object)); |
6569cc8d JB |
613 | |
614 | this_command_keys = new_keys; | |
284f4730 | 615 | } |
6569cc8d JB |
616 | |
617 | XVECTOR (this_command_keys)->contents[this_command_key_count++] = key; | |
284f4730 JB |
618 | } |
619 | \f | |
620 | Lisp_Object | |
621 | recursive_edit_1 () | |
622 | { | |
623 | int count = specpdl_ptr - specpdl; | |
624 | Lisp_Object val; | |
625 | ||
626 | if (command_loop_level > 0) | |
627 | { | |
628 | specbind (Qstandard_output, Qt); | |
629 | specbind (Qstandard_input, Qt); | |
630 | } | |
631 | ||
632 | val = command_loop (); | |
633 | if (EQ (val, Qt)) | |
634 | Fsignal (Qquit, Qnil); | |
635 | ||
cb5df6ae | 636 | return unbind_to (count, Qnil); |
284f4730 JB |
637 | } |
638 | ||
639 | /* When an auto-save happens, record the "time", and don't do again soon. */ | |
640 | record_auto_save () | |
641 | { | |
51172b6d | 642 | last_auto_save = num_nonmacro_input_chars; |
284f4730 JB |
643 | } |
644 | \f | |
284f4730 JB |
645 | DEFUN ("recursive-edit", Frecursive_edit, Srecursive_edit, 0, 0, "", |
646 | "Invoke the editor command loop recursively.\n\ | |
647 | To get out of the recursive edit, a command can do `(throw 'exit nil)';\n\ | |
648 | that tells this function to return.\n\ | |
649 | Alternately, `(throw 'exit t)' makes this function signal an error.\n\ | |
650 | This function is called by the editor initialization to begin editing.") | |
651 | () | |
652 | { | |
653 | int count = specpdl_ptr - specpdl; | |
654 | Lisp_Object val; | |
655 | ||
656 | command_loop_level++; | |
657 | update_mode_lines = 1; | |
658 | ||
659 | record_unwind_protect (recursive_edit_unwind, | |
660 | (command_loop_level | |
661 | && current_buffer != XBUFFER (XWINDOW (selected_window)->buffer)) | |
662 | ? Fcurrent_buffer () | |
663 | : Qnil); | |
664 | recursive_edit_1 (); | |
665 | return unbind_to (count, Qnil); | |
666 | } | |
667 | ||
668 | Lisp_Object | |
669 | recursive_edit_unwind (buffer) | |
670 | Lisp_Object buffer; | |
671 | { | |
672 | if (!NILP (buffer)) | |
673 | Fset_buffer (buffer); | |
674 | ||
675 | command_loop_level--; | |
676 | update_mode_lines = 1; | |
677 | return Qnil; | |
678 | } | |
679 | \f | |
680 | Lisp_Object | |
681 | cmd_error (data) | |
682 | Lisp_Object data; | |
683 | { | |
684 | Lisp_Object errmsg, tail, errname, file_error; | |
685 | Lisp_Object stream; | |
686 | struct gcpro gcpro1; | |
687 | int i; | |
688 | ||
689 | Vquit_flag = Qnil; | |
690 | Vinhibit_quit = Qt; | |
691 | Vstandard_output = Qt; | |
692 | Vstandard_input = Qt; | |
693 | Vexecuting_macro = Qnil; | |
694 | echo_area_glyphs = 0; | |
695 | ||
ff11dfa1 | 696 | /* If the window system or terminal frame hasn't been initialized |
284f4730 JB |
697 | yet, or we're not interactive, it's best to dump this message out |
698 | to stderr and exit. */ | |
ff11dfa1 | 699 | if (! FRAME_MESSAGE_BUF (selected_frame) |
284f4730 JB |
700 | || noninteractive) |
701 | stream = Qexternal_debugging_output; | |
702 | else | |
703 | { | |
704 | Fdiscard_input (); | |
705 | bitch_at_user (); | |
706 | stream = Qt; | |
707 | } | |
708 | ||
709 | errname = Fcar (data); | |
710 | ||
711 | if (EQ (errname, Qerror)) | |
712 | { | |
713 | data = Fcdr (data); | |
714 | if (!CONSP (data)) data = Qnil; | |
715 | errmsg = Fcar (data); | |
716 | file_error = Qnil; | |
717 | } | |
718 | else | |
719 | { | |
720 | errmsg = Fget (errname, Qerror_message); | |
721 | file_error = Fmemq (Qfile_error, | |
722 | Fget (errname, Qerror_conditions)); | |
723 | } | |
724 | ||
725 | /* Print an error message including the data items. | |
726 | This is done by printing it into a scratch buffer | |
727 | and then making a copy of the text in the buffer. */ | |
728 | ||
729 | if (!CONSP (data)) data = Qnil; | |
730 | tail = Fcdr (data); | |
731 | GCPRO1 (tail); | |
732 | ||
733 | /* For file-error, make error message by concatenating | |
734 | all the data items. They are all strings. */ | |
735 | if (!NILP (file_error) && !NILP (tail)) | |
736 | errmsg = XCONS (tail)->car, tail = XCONS (tail)->cdr; | |
737 | ||
738 | if (XTYPE (errmsg) == Lisp_String) | |
739 | Fprinc (errmsg, stream); | |
740 | else | |
741 | write_string_1 ("peculiar error", -1, stream); | |
742 | ||
743 | for (i = 0; CONSP (tail); tail = Fcdr (tail), i++) | |
744 | { | |
745 | write_string_1 (i ? ", " : ": ", 2, stream); | |
746 | if (!NILP (file_error)) | |
747 | Fprinc (Fcar (tail), stream); | |
748 | else | |
749 | Fprin1 (Fcar (tail), stream); | |
750 | } | |
751 | UNGCPRO; | |
752 | ||
ff11dfa1 | 753 | /* If the window system or terminal frame hasn't been initialized |
284f4730 | 754 | yet, or we're in -batch mode, this error should cause Emacs to exit. */ |
ff11dfa1 | 755 | if (! FRAME_MESSAGE_BUF (selected_frame) |
284f4730 JB |
756 | || noninteractive) |
757 | { | |
758 | Fterpri (stream); | |
759 | Fkill_emacs (make_number (-1)); | |
760 | } | |
761 | ||
762 | Vquit_flag = Qnil; | |
763 | ||
764 | Vinhibit_quit = Qnil; | |
765 | return make_number (0); | |
766 | } | |
767 | \f | |
768 | Lisp_Object command_loop_1 (); | |
769 | Lisp_Object command_loop_2 (); | |
770 | Lisp_Object top_level_1 (); | |
771 | ||
772 | /* Entry to editor-command-loop. | |
773 | This level has the catches for exiting/returning to editor command loop. | |
774 | It returns nil to exit recursive edit, t to abort it. */ | |
775 | ||
776 | Lisp_Object | |
777 | command_loop () | |
778 | { | |
779 | if (command_loop_level > 0 || minibuf_level > 0) | |
780 | { | |
781 | return internal_catch (Qexit, command_loop_2, Qnil); | |
782 | } | |
783 | else | |
784 | while (1) | |
785 | { | |
786 | internal_catch (Qtop_level, top_level_1, Qnil); | |
787 | internal_catch (Qtop_level, command_loop_2, Qnil); | |
788 | ||
789 | /* End of file in -batch run causes exit here. */ | |
790 | if (noninteractive) | |
791 | Fkill_emacs (Qt); | |
792 | } | |
793 | } | |
794 | ||
795 | /* Here we catch errors in execution of commands within the | |
796 | editing loop, and reenter the editing loop. | |
797 | When there is an error, cmd_error runs and returns a non-nil | |
798 | value to us. A value of nil means that cmd_loop_1 itself | |
799 | returned due to end of file (or end of kbd macro). */ | |
800 | ||
801 | Lisp_Object | |
802 | command_loop_2 () | |
803 | { | |
804 | register Lisp_Object val; | |
805 | ||
806 | do | |
807 | val = internal_condition_case (command_loop_1, Qerror, cmd_error); | |
808 | while (!NILP (val)); | |
809 | ||
810 | return Qnil; | |
811 | } | |
812 | ||
813 | Lisp_Object | |
814 | top_level_2 () | |
815 | { | |
816 | return Feval (Vtop_level); | |
817 | } | |
818 | ||
819 | Lisp_Object | |
820 | top_level_1 () | |
821 | { | |
822 | /* On entry to the outer level, run the startup file */ | |
823 | if (!NILP (Vtop_level)) | |
824 | internal_condition_case (top_level_2, Qerror, cmd_error); | |
825 | else if (!NILP (Vpurify_flag)) | |
826 | message ("Bare impure Emacs (standard Lisp code not loaded)"); | |
827 | else | |
828 | message ("Bare Emacs (standard Lisp code not loaded)"); | |
829 | return Qnil; | |
830 | } | |
831 | ||
832 | DEFUN ("top-level", Ftop_level, Stop_level, 0, 0, "", | |
833 | "Exit all recursive editing levels.") | |
834 | () | |
835 | { | |
836 | Fthrow (Qtop_level, Qnil); | |
837 | } | |
838 | ||
839 | DEFUN ("exit-recursive-edit", Fexit_recursive_edit, Sexit_recursive_edit, 0, 0, "", | |
840 | "Exit from the innermost recursive edit or minibuffer.") | |
841 | () | |
842 | { | |
843 | if (command_loop_level > 0 || minibuf_level > 0) | |
844 | Fthrow (Qexit, Qnil); | |
845 | ||
846 | error ("No recursive edit is in progress"); | |
847 | } | |
848 | ||
849 | DEFUN ("abort-recursive-edit", Fabort_recursive_edit, Sabort_recursive_edit, 0, 0, "", | |
850 | "Abort the command that requested this recursive edit or minibuffer input.") | |
851 | () | |
852 | { | |
853 | if (command_loop_level > 0 || minibuf_level > 0) | |
854 | Fthrow (Qexit, Qt); | |
855 | ||
856 | error ("No recursive edit is in progress"); | |
857 | } | |
858 | \f | |
859 | /* This is the actual command reading loop, | |
860 | sans error-handling encapsulation. */ | |
861 | ||
862 | Lisp_Object Fcommand_execute (); | |
863 | static int read_key_sequence (); | |
864 | ||
865 | Lisp_Object | |
866 | command_loop_1 () | |
867 | { | |
48e416d4 | 868 | Lisp_Object cmd, tem; |
284f4730 JB |
869 | int lose; |
870 | int nonundocount; | |
871 | Lisp_Object keybuf[30]; | |
872 | int i; | |
873 | int no_redisplay; | |
874 | int no_direct; | |
86e5706b RS |
875 | int prev_modiff; |
876 | struct buffer *prev_buffer; | |
284f4730 JB |
877 | |
878 | Vprefix_arg = Qnil; | |
86e5706b | 879 | Vdeactivate_mark = Qnil; |
284f4730 JB |
880 | waiting_for_input = 0; |
881 | cancel_echoing (); | |
882 | ||
883 | /* Don't clear out last_command at the beginning of a macro. */ | |
884 | if (XTYPE (Vexecuting_macro) != Lisp_String) | |
885 | last_command = Qt; | |
886 | ||
887 | nonundocount = 0; | |
888 | no_redisplay = 0; | |
889 | this_command_key_count = 0; | |
890 | ||
891 | while (1) | |
892 | { | |
893 | /* Install chars successfully executed in kbd macro. */ | |
894 | ||
895 | if (defining_kbd_macro && NILP (Vprefix_arg)) | |
896 | finalize_kbd_macro_chars (); | |
897 | ||
898 | /* Make sure the current window's buffer is selected. */ | |
899 | if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) | |
900 | set_buffer_internal (XBUFFER (XWINDOW (selected_window)->buffer)); | |
901 | ||
902 | /* Display any malloc warning that just came out. Use while because | |
903 | displaying one warning can cause another. */ | |
904 | ||
905 | while (pending_malloc_warning) | |
906 | display_malloc_warning (); | |
907 | ||
908 | no_direct = 0; | |
909 | ||
86e5706b RS |
910 | Vdeactivate_mark = Qnil; |
911 | ||
284f4730 | 912 | /* If minibuffer on and echo area in use, |
eb8c3be9 | 913 | wait 2 sec and redraw minibuffer. */ |
284f4730 JB |
914 | |
915 | if (minibuf_level && echo_area_glyphs) | |
916 | { | |
f1bed6d8 RS |
917 | /* Bind inhibit-quit to t so that C-g gets read in |
918 | rather than quitting back to the minibuffer. */ | |
919 | int count = specpdl_ptr - specpdl; | |
920 | specbind (Qinhibit_quit, Qt); | |
284f4730 | 921 | Fsit_for (make_number (2), Qnil, Qnil); |
cb5df6ae | 922 | unbind_to (count, Qnil); |
f1bed6d8 | 923 | |
284f4730 JB |
924 | echo_area_glyphs = 0; |
925 | no_direct = 1; | |
926 | if (!NILP (Vquit_flag)) | |
927 | { | |
928 | Vquit_flag = Qnil; | |
dbc4e1c1 | 929 | unread_command_events = Fcons (make_number (quit_char), Qnil); |
284f4730 JB |
930 | } |
931 | } | |
932 | ||
933 | #ifdef C_ALLOCA | |
934 | alloca (0); /* Cause a garbage collection now */ | |
935 | /* Since we can free the most stuff here. */ | |
936 | #endif /* C_ALLOCA */ | |
937 | ||
8f805655 | 938 | #if 0 |
ff11dfa1 | 939 | #ifdef MULTI_FRAME |
8f805655 JB |
940 | /* Select the frame that the last event came from. Usually, |
941 | switch-frame events will take care of this, but if some lisp | |
942 | code swallows a switch-frame event, we'll fix things up here. | |
943 | Is this a good idea? */ | |
3c370943 JB |
944 | if (XTYPE (internal_last_event_frame) == Lisp_Frame |
945 | && XFRAME (internal_last_event_frame) != selected_frame) | |
946 | Fselect_frame (internal_last_event_frame, Qnil); | |
cd21b839 | 947 | #endif |
284f4730 | 948 | #endif |
48e416d4 RS |
949 | /* If it has changed current-menubar from previous value, |
950 | really recompute the menubar from the value. */ | |
951 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
952 | call0 (Qrecompute_lucid_menubar); | |
953 | ||
0e9d6dd3 | 954 | #if 0 /* This is done in xdisp.c now. */ |
48e416d4 RS |
955 | #ifdef MULTI_FRAME |
956 | for (tem = Vframe_list; CONSP (tem); tem = XCONS (tem)->cdr) | |
957 | { | |
958 | struct frame *f = XFRAME (XCONS (tem)->car); | |
959 | struct window *w = XWINDOW (FRAME_SELECTED_WINDOW (f)); | |
598a9fa7 JB |
960 | |
961 | /* If the user has switched buffers or windows, we need to | |
962 | recompute to reflect the new bindings. But we'll | |
963 | recompute when update_mode_lines is set too; that means | |
964 | that people can use force-mode-line-update to request | |
965 | that the menu bar be recomputed. The adverse effect on | |
966 | the rest of the redisplay algorithm is about the same as | |
967 | windows_or_buffers_changed anyway. */ | |
48e416d4 | 968 | if (windows_or_buffers_changed |
598a9fa7 | 969 | || update_mode_lines |
48e416d4 RS |
970 | || (XFASTINT (w->last_modified) < MODIFF |
971 | && (XFASTINT (w->last_modified) | |
972 | <= XBUFFER (w->buffer)->save_modified))) | |
973 | { | |
974 | struct buffer *prev = current_buffer; | |
975 | current_buffer = XBUFFER (w->buffer); | |
976 | FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (); | |
977 | current_buffer = prev; | |
978 | } | |
979 | } | |
980 | #endif /* MULTI_FRAME */ | |
0e9d6dd3 | 981 | #endif /* 0 */ |
284f4730 | 982 | |
8f805655 JB |
983 | /* Read next key sequence; i gets its length. */ |
984 | i = read_key_sequence (keybuf, (sizeof keybuf / sizeof (keybuf[0])), 0); | |
985 | ||
986 | ++num_input_keys; | |
987 | ||
284f4730 JB |
988 | /* Now we have read a key sequence of length I, |
989 | or else I is 0 and we found end of file. */ | |
990 | ||
991 | if (i == 0) /* End of file -- happens only in */ | |
992 | return Qnil; /* a kbd macro, at the end. */ | |
dcc408a0 RS |
993 | /* -1 means read_key_sequence got a menu that was rejected. |
994 | Just loop around and read another command. */ | |
995 | if (i == -1) | |
996 | { | |
997 | cancel_echoing (); | |
998 | this_command_key_count = 0; | |
999 | continue; | |
1000 | } | |
284f4730 | 1001 | |
284f4730 JB |
1002 | last_command_char = keybuf[i - 1]; |
1003 | ||
75c0b143 RS |
1004 | /* If the previous command tried to force a specific window-start, |
1005 | forget about that, in case this command moves point far away | |
1006 | from that position. */ | |
1007 | XWINDOW (selected_window)->force_start = Qnil; | |
1008 | ||
284f4730 JB |
1009 | cmd = read_key_sequence_cmd; |
1010 | if (!NILP (Vexecuting_macro)) | |
1011 | { | |
1012 | if (!NILP (Vquit_flag)) | |
1013 | { | |
1014 | Vexecuting_macro = Qt; | |
1015 | QUIT; /* Make some noise. */ | |
1016 | /* Will return since macro now empty. */ | |
1017 | } | |
1018 | } | |
1019 | ||
1020 | /* Do redisplay processing after this command except in special | |
1021 | cases identified below that set no_redisplay to 1. */ | |
1022 | no_redisplay = 0; | |
1023 | ||
86e5706b RS |
1024 | prev_buffer = current_buffer; |
1025 | prev_modiff = MODIFF; | |
1026 | ||
284f4730 JB |
1027 | /* Execute the command. */ |
1028 | ||
86e5706b RS |
1029 | this_command = cmd; |
1030 | if (!NILP (Vpre_command_hook)) | |
1031 | call1 (Vrun_hooks, Qpre_command_hook); | |
1032 | ||
258bf746 | 1033 | if (NILP (this_command)) |
284f4730 JB |
1034 | { |
1035 | /* nil means key is undefined. */ | |
1036 | bitch_at_user (); | |
1037 | defining_kbd_macro = 0; | |
1038 | update_mode_lines = 1; | |
1039 | Vprefix_arg = Qnil; | |
86e5706b | 1040 | |
284f4730 JB |
1041 | } |
1042 | else | |
1043 | { | |
284f4730 JB |
1044 | if (NILP (Vprefix_arg) && ! no_direct) |
1045 | { | |
1046 | /* Recognize some common commands in common situations and | |
1047 | do them directly. */ | |
258bf746 | 1048 | if (EQ (this_command, Qforward_char) && point < ZV) |
284f4730 JB |
1049 | { |
1050 | struct Lisp_Vector *dp | |
1051 | = window_display_table (XWINDOW (selected_window)); | |
1052 | lose = FETCH_CHAR (point); | |
1053 | SET_PT (point + 1); | |
0f7a8fee JB |
1054 | if ((dp |
1055 | ? (XTYPE (DISP_CHAR_VECTOR (dp, lose)) != Lisp_Vector | |
06ddfb24 | 1056 | && XVECTOR (DISP_CHAR_VECTOR (dp, lose))->size == 1) |
0f7a8fee | 1057 | : (lose >= 0x20 && lose < 0x7f)) |
284f4730 JB |
1058 | && (XFASTINT (XWINDOW (selected_window)->last_modified) |
1059 | >= MODIFF) | |
1060 | && (XFASTINT (XWINDOW (selected_window)->last_point) | |
1061 | == point - 1) | |
1062 | && !windows_or_buffers_changed | |
1063 | && EQ (current_buffer->selective_display, Qnil) | |
1064 | && !detect_input_pending () | |
1065 | && NILP (Vexecuting_macro)) | |
1066 | no_redisplay = direct_output_forward_char (1); | |
1067 | goto directly_done; | |
1068 | } | |
258bf746 | 1069 | else if (EQ (this_command, Qbackward_char) && point > BEGV) |
284f4730 JB |
1070 | { |
1071 | struct Lisp_Vector *dp | |
1072 | = window_display_table (XWINDOW (selected_window)); | |
1073 | SET_PT (point - 1); | |
1074 | lose = FETCH_CHAR (point); | |
0f7a8fee JB |
1075 | if ((dp |
1076 | ? (XTYPE (DISP_CHAR_VECTOR (dp, lose)) != Lisp_Vector | |
06ddfb24 | 1077 | && XVECTOR (DISP_CHAR_VECTOR (dp, lose))->size == 1) |
0f7a8fee | 1078 | : (lose >= 0x20 && lose < 0x7f)) |
284f4730 JB |
1079 | && (XFASTINT (XWINDOW (selected_window)->last_modified) |
1080 | >= MODIFF) | |
1081 | && (XFASTINT (XWINDOW (selected_window)->last_point) | |
1082 | == point + 1) | |
1083 | && !windows_or_buffers_changed | |
1084 | && EQ (current_buffer->selective_display, Qnil) | |
1085 | && !detect_input_pending () | |
1086 | && NILP (Vexecuting_macro)) | |
1087 | no_redisplay = direct_output_forward_char (-1); | |
1088 | goto directly_done; | |
1089 | } | |
258bf746 | 1090 | else if (EQ (this_command, Qself_insert_command) |
284f4730 JB |
1091 | /* Try this optimization only on ascii keystrokes. */ |
1092 | && XTYPE (last_command_char) == Lisp_Int) | |
1093 | { | |
1094 | unsigned char c = XINT (last_command_char); | |
1095 | ||
1096 | if (NILP (Vexecuting_macro) && | |
1097 | !EQ (minibuf_window, selected_window)) | |
1098 | { | |
1099 | if (!nonundocount || nonundocount >= 20) | |
1100 | { | |
1101 | Fundo_boundary (); | |
1102 | nonundocount = 0; | |
1103 | } | |
1104 | nonundocount++; | |
1105 | } | |
1106 | lose = (XFASTINT (XWINDOW (selected_window)->last_modified) | |
1107 | < MODIFF) | |
1108 | || (XFASTINT (XWINDOW (selected_window)->last_point) | |
1109 | != point) | |
1110 | || MODIFF <= current_buffer->save_modified | |
1111 | || windows_or_buffers_changed | |
1112 | || !EQ (current_buffer->selective_display, Qnil) | |
1113 | || detect_input_pending () | |
1114 | || !NILP (Vexecuting_macro); | |
b8d9050d | 1115 | if (internal_self_insert (c, 0)) |
284f4730 JB |
1116 | { |
1117 | lose = 1; | |
1118 | nonundocount = 0; | |
1119 | } | |
1120 | if (!lose && | |
1121 | (point == ZV || FETCH_CHAR (point) == '\n')) | |
1122 | { | |
1123 | struct Lisp_Vector *dp | |
1124 | = window_display_table (XWINDOW (selected_window)); | |
b8d9050d | 1125 | int lose = c; |
284f4730 | 1126 | |
0f7a8fee JB |
1127 | if (dp) |
1128 | { | |
1129 | Lisp_Object obj = DISP_CHAR_VECTOR (dp, lose); | |
1130 | ||
1131 | if (XTYPE (obj) == Lisp_Vector | |
1132 | && XVECTOR (obj)->size == 1 | |
1133 | && (XTYPE (obj = XVECTOR (obj)->contents[0]) | |
1134 | == Lisp_Int)) | |
1135 | no_redisplay = | |
1136 | direct_output_for_insert (XINT (obj)); | |
1137 | } | |
1138 | else | |
1139 | { | |
1140 | if (lose >= 0x20 && lose <= 0x7e) | |
1141 | no_redisplay = direct_output_for_insert (lose); | |
1142 | } | |
284f4730 JB |
1143 | } |
1144 | goto directly_done; | |
1145 | } | |
1146 | } | |
1147 | ||
1148 | /* Here for a command that isn't executed directly */ | |
1149 | ||
1150 | nonundocount = 0; | |
1151 | if (NILP (Vprefix_arg)) | |
1152 | Fundo_boundary (); | |
258bf746 | 1153 | Fcommand_execute (this_command, Qnil); |
284f4730 | 1154 | |
284f4730 | 1155 | } |
a764a753 | 1156 | directly_done: ; |
284f4730 | 1157 | |
86e5706b RS |
1158 | if (!NILP (Vpost_command_hook)) |
1159 | call1 (Vrun_hooks, Qpost_command_hook); | |
1160 | ||
284f4730 JB |
1161 | /* If there is a prefix argument, |
1162 | 1) We don't want last_command to be ``universal-argument'' | |
1163 | (that would be dumb), so don't set last_command, | |
1164 | 2) we want to leave echoing on so that the prefix will be | |
1165 | echoed as part of this key sequence, so don't call | |
1166 | cancel_echoing, and | |
1167 | 3) we want to leave this_command_key_count non-zero, so that | |
1168 | read_char will realize that it is re-reading a character, and | |
1169 | not echo it a second time. */ | |
1170 | if (NILP (Vprefix_arg)) | |
1171 | { | |
1172 | last_command = this_command; | |
1173 | cancel_echoing (); | |
1174 | this_command_key_count = 0; | |
1175 | } | |
86e5706b RS |
1176 | |
1177 | if (!NILP (current_buffer->mark_active)) | |
1178 | { | |
1179 | if (!NILP (Vdeactivate_mark) && !NILP (Vtransient_mark_mode)) | |
1180 | { | |
1181 | current_buffer->mark_active = Qnil; | |
1182 | call1 (Vrun_hooks, intern ("deactivate-mark-hook")); | |
1183 | } | |
1184 | else if (current_buffer != prev_buffer || MODIFF != prev_modiff) | |
1185 | call1 (Vrun_hooks, intern ("activate-mark-hook")); | |
1186 | } | |
284f4730 JB |
1187 | } |
1188 | } | |
1189 | \f | |
1190 | /* Number of seconds between polling for input. */ | |
1191 | int polling_period; | |
1192 | ||
eb8c3be9 | 1193 | /* Nonzero means polling for input is temporarily suppressed. */ |
284f4730 JB |
1194 | int poll_suppress_count; |
1195 | ||
1196 | #ifdef POLL_FOR_INPUT | |
1197 | int polling_for_input; | |
1198 | ||
1199 | /* Handle an alarm once each second and read pending input | |
1200 | so as to handle a C-g if it comces in. */ | |
1201 | ||
1202 | SIGTYPE | |
1203 | input_poll_signal () | |
1204 | { | |
9ac0d9e0 JB |
1205 | if (interrupt_input_blocked == 0 |
1206 | && !waiting_for_input) | |
1207 | read_avail_input (0); | |
284f4730 JB |
1208 | signal (SIGALRM, input_poll_signal); |
1209 | alarm (polling_period); | |
1210 | } | |
1211 | ||
1212 | #endif | |
1213 | ||
1214 | /* Begin signals to poll for input, if they are appropriate. | |
1215 | This function is called unconditionally from various places. */ | |
1216 | ||
1217 | start_polling () | |
1218 | { | |
1219 | #ifdef POLL_FOR_INPUT | |
1220 | if (read_socket_hook) | |
1221 | { | |
1222 | poll_suppress_count--; | |
1223 | if (poll_suppress_count == 0) | |
1224 | { | |
1225 | signal (SIGALRM, input_poll_signal); | |
1226 | polling_for_input = 1; | |
1227 | alarm (polling_period); | |
1228 | } | |
1229 | } | |
1230 | #endif | |
1231 | } | |
1232 | ||
1233 | /* Turn off polling. */ | |
1234 | ||
1235 | stop_polling () | |
1236 | { | |
1237 | #ifdef POLL_FOR_INPUT | |
1238 | if (read_socket_hook) | |
1239 | { | |
1240 | if (poll_suppress_count == 0) | |
1241 | { | |
1242 | polling_for_input = 0; | |
1243 | alarm (0); | |
1244 | } | |
1245 | poll_suppress_count++; | |
1246 | } | |
1247 | #endif | |
1248 | } | |
1249 | \f | |
faf5e407 JB |
1250 | /* Applying the control modifier to CHARACTER. */ |
1251 | int | |
1252 | make_ctrl_char (c) | |
1253 | int c; | |
1254 | { | |
d205953b JB |
1255 | /* Save the upper bits here. */ |
1256 | int upper = c & ~0177; | |
1257 | ||
1258 | c &= 0177; | |
1259 | ||
1260 | /* Everything in the columns containing the upper-case letters | |
1261 | denotes a control character. */ | |
1262 | if (c >= 0100 && c < 0140) | |
1263 | { | |
1264 | int oc = c; | |
1265 | c &= ~0140; | |
1266 | /* Set the shift modifier for a control char | |
1267 | made from a shifted letter. But only for letters! */ | |
1268 | if (oc >= 'A' && oc <= 'Z') | |
1269 | c |= shift_modifier; | |
1270 | } | |
1271 | ||
1272 | /* The lower-case letters denote control characters too. */ | |
1273 | else if (c >= 'a' && c <= 'z') | |
1274 | c &= ~0140; | |
1275 | ||
1276 | /* Include the bits for control and shift | |
1277 | only if the basic ASCII code can't indicate them. */ | |
1278 | else if (c >= ' ') | |
1279 | c |= ctrl_modifier; | |
1280 | ||
1281 | /* Replace the high bits. */ | |
1282 | c |= (upper & ~ctrl_modifier); | |
faf5e407 JB |
1283 | |
1284 | return c; | |
1285 | } | |
1286 | ||
1287 | ||
1288 | \f | |
284f4730 JB |
1289 | /* Input of single characters from keyboard */ |
1290 | ||
1291 | Lisp_Object print_help (); | |
1292 | static Lisp_Object kbd_buffer_get_event (); | |
1293 | ||
1294 | /* read a character from the keyboard; call the redisplay if needed */ | |
1295 | /* commandflag 0 means do not do auto-saving, but do do redisplay. | |
1296 | -1 means do not do redisplay, but do do autosaving. | |
1297 | 1 means do both. */ | |
1298 | ||
7d6de002 RS |
1299 | /* The arguments MAPS and NMAPS are for menu prompting. |
1300 | MAPS is an array of keymaps; NMAPS is the length of MAPS. | |
1301 | ||
1302 | PREV_EVENT is the previous input event, or nil if we are reading | |
1303 | the first event of a key sequence. | |
1304 | ||
6569cc8d JB |
1305 | If USED_MOUSE_MENU is non-zero, then we set *USED_MOUSE_MENU to 1 |
1306 | if we used a mouse menu to read the input, or zero otherwise. If | |
dcc408a0 RS |
1307 | USED_MOUSE_MENU is zero, *USED_MOUSE_MENU is left alone. |
1308 | ||
1309 | Value is t if we showed a menu and the user rejected it. */ | |
7d6de002 | 1310 | |
284f4730 | 1311 | Lisp_Object |
7d6de002 | 1312 | read_char (commandflag, nmaps, maps, prev_event, used_mouse_menu) |
284f4730 | 1313 | int commandflag; |
7d6de002 RS |
1314 | int nmaps; |
1315 | Lisp_Object *maps; | |
1316 | Lisp_Object prev_event; | |
1317 | int *used_mouse_menu; | |
284f4730 JB |
1318 | { |
1319 | register Lisp_Object c; | |
1320 | int count; | |
1321 | jmp_buf save_jump; | |
1322 | ||
dbc4e1c1 | 1323 | if (CONSP (unread_command_events)) |
284f4730 | 1324 | { |
dbc4e1c1 JB |
1325 | c = XCONS (unread_command_events)->car; |
1326 | unread_command_events = XCONS (unread_command_events)->cdr; | |
284f4730 | 1327 | |
284f4730 JB |
1328 | if (this_command_key_count == 0) |
1329 | goto reread_first; | |
1330 | else | |
1331 | goto reread; | |
1332 | } | |
1333 | ||
86e5706b RS |
1334 | if (unread_command_char != -1) |
1335 | { | |
1336 | XSET (c, Lisp_Int, unread_command_char); | |
1337 | unread_command_char = -1; | |
1338 | ||
1339 | if (this_command_key_count == 0) | |
1340 | goto reread_first; | |
1341 | else | |
1342 | goto reread; | |
1343 | } | |
1344 | ||
284f4730 JB |
1345 | if (!NILP (Vexecuting_macro)) |
1346 | { | |
07d2b8de | 1347 | #ifdef MULTI_FRAME |
fce33686 JB |
1348 | /* We set this to Qmacro; since that's not a frame, nobody will |
1349 | try to switch frames on us, and the selected window will | |
1350 | remain unchanged. | |
1351 | ||
1352 | Since this event came from a macro, it would be misleading to | |
eb8c3be9 | 1353 | leave internal_last_event_frame set to wherever the last |
3c370943 JB |
1354 | real event came from. Normally, a switch-frame event selects |
1355 | internal_last_event_frame after each command is read, but | |
1356 | events read from a macro should never cause a new frame to be | |
1357 | selected. */ | |
1358 | Vlast_event_frame = internal_last_event_frame = Qmacro; | |
07d2b8de | 1359 | #endif |
fce33686 | 1360 | |
663258f2 JB |
1361 | /* Exit the macro if we are at the end. |
1362 | Also, some things replace the macro with t | |
1363 | to force an early exit. */ | |
1364 | if (EQ (Vexecuting_macro, Qt) | |
1365 | || executing_macro_index >= XFASTINT (Flength (Vexecuting_macro))) | |
284f4730 JB |
1366 | { |
1367 | XSET (c, Lisp_Int, -1); | |
1368 | return c; | |
1369 | } | |
1370 | ||
1371 | c = Faref (Vexecuting_macro, make_number (executing_macro_index)); | |
86e5706b RS |
1372 | if (XTYPE (Vexecuting_macro) == Lisp_String |
1373 | && (XINT (c) & 0x80)) | |
1374 | XFASTINT (c) = CHAR_META | (XINT (c) & ~0x80); | |
1375 | ||
284f4730 JB |
1376 | executing_macro_index++; |
1377 | ||
1378 | goto from_macro; | |
1379 | } | |
1380 | ||
cd21b839 JB |
1381 | if (!NILP (unread_switch_frame)) |
1382 | { | |
1383 | c = unread_switch_frame; | |
1384 | unread_switch_frame = Qnil; | |
1385 | ||
1386 | /* This event should make it into this_command_keys, and get echoed | |
f4255cd1 JB |
1387 | again, so we go to reread_first, rather than reread. */ |
1388 | goto reread_first; | |
cd21b839 JB |
1389 | } |
1390 | ||
284f4730 | 1391 | /* Save outer setjmp data, in case called recursively. */ |
f76475ad | 1392 | save_getcjmp (save_jump); |
284f4730 JB |
1393 | |
1394 | stop_polling (); | |
1395 | ||
1396 | if (commandflag >= 0 && !input_pending && !detect_input_pending ()) | |
1397 | redisplay (); | |
1398 | ||
1399 | if (_setjmp (getcjmp)) | |
1400 | { | |
1401 | XSET (c, Lisp_Int, quit_char); | |
07d2b8de | 1402 | #ifdef MULTI_FRAME |
3c370943 JB |
1403 | XSET (internal_last_event_frame, Lisp_Frame, selected_frame); |
1404 | Vlast_event_frame = internal_last_event_frame; | |
07d2b8de | 1405 | #endif |
04904c29 RS |
1406 | /* If we report the quit char as an event, |
1407 | don't do so more than once. */ | |
1408 | if (!NILP (Vinhibit_quit)) | |
1409 | Vquit_flag = Qnil; | |
284f4730 | 1410 | |
284f4730 JB |
1411 | goto non_reread; |
1412 | } | |
1413 | ||
1414 | /* Message turns off echoing unless more keystrokes turn it on again. */ | |
1415 | if (echo_area_glyphs && *echo_area_glyphs && echo_area_glyphs != echobuf) | |
1416 | cancel_echoing (); | |
1417 | else | |
1418 | /* If already echoing, continue. */ | |
1419 | echo_dash (); | |
1420 | ||
1421 | /* If in middle of key sequence and minibuffer not active, | |
1422 | start echoing if enough time elapses. */ | |
1423 | if (minibuf_level == 0 && !immediate_echo && this_command_key_count > 0 | |
1424 | && echo_keystrokes > 0 | |
1425 | && (echo_area_glyphs == 0 || *echo_area_glyphs == 0)) | |
1426 | { | |
1427 | Lisp_Object tem0; | |
1428 | ||
7d6de002 RS |
1429 | /* After a mouse event, start echoing right away. |
1430 | This is because we are probably about to display a menu, | |
1431 | and we don't want to delay before doing so. */ | |
dbc4e1c1 | 1432 | if (EVENT_HAS_PARAMETERS (prev_event)) |
284f4730 | 1433 | echo (); |
7d6de002 RS |
1434 | else |
1435 | { | |
1436 | tem0 = sit_for (echo_keystrokes, 0, 1, 1); | |
1437 | if (EQ (tem0, Qt)) | |
1438 | echo (); | |
1439 | } | |
284f4730 JB |
1440 | } |
1441 | ||
1442 | /* Maybe auto save due to number of keystrokes or idle time. */ | |
1443 | ||
1444 | if (commandflag != 0 | |
1445 | && auto_save_interval > 0 | |
51172b6d | 1446 | && num_nonmacro_input_chars - last_auto_save > max (auto_save_interval, 20) |
284f4730 JB |
1447 | && !detect_input_pending ()) |
1448 | { | |
1449 | jmp_buf temp; | |
1450 | save_getcjmp (temp); | |
1451 | Fdo_auto_save (Qnil, Qnil); | |
1452 | restore_getcjmp (temp); | |
1453 | } | |
1454 | ||
7d6de002 RS |
1455 | /* Try reading a character via menu prompting. |
1456 | Try this before the sit-for, because the sit-for | |
1457 | would do the wrong thing if we are supposed to do | |
1458 | menu prompting. */ | |
1459 | c = Qnil; | |
1460 | if (INTERACTIVE && !NILP (prev_event)) | |
1461 | c = read_char_menu_prompt (nmaps, maps, prev_event, used_mouse_menu); | |
1462 | ||
284f4730 JB |
1463 | /* Slow down auto saves logarithmically in size of current buffer, |
1464 | and garbage collect while we're at it. */ | |
26c1639e | 1465 | if (INTERACTIVE && NILP (c)) |
7d6de002 RS |
1466 | { |
1467 | int delay_level, buffer_size; | |
1468 | ||
1469 | if (! MINI_WINDOW_P (XWINDOW (selected_window))) | |
1470 | last_non_minibuf_size = Z - BEG; | |
1471 | buffer_size = (last_non_minibuf_size >> 8) + 1; | |
1472 | delay_level = 0; | |
1473 | while (buffer_size > 64) | |
1474 | delay_level++, buffer_size -= buffer_size >> 2; | |
1475 | if (delay_level < 4) delay_level = 4; | |
1476 | /* delay_level is 4 for files under around 50k, 7 at 100k, | |
1477 | 9 at 200k, 11 at 300k, and 12 at 500k. It is 15 at 1 meg. */ | |
1478 | ||
1479 | /* Auto save if enough time goes by without input. */ | |
1480 | if (commandflag != 0 | |
51172b6d | 1481 | && num_nonmacro_input_chars > last_auto_save |
7d6de002 RS |
1482 | && XTYPE (Vauto_save_timeout) == Lisp_Int |
1483 | && XINT (Vauto_save_timeout) > 0) | |
1484 | { | |
1485 | Lisp_Object tem0; | |
1486 | int delay = delay_level * XFASTINT (Vauto_save_timeout) / 4; | |
1487 | tem0 = sit_for (delay, 0, 1, 1); | |
1488 | if (EQ (tem0, Qt)) | |
1489 | { | |
1490 | jmp_buf temp; | |
1491 | save_getcjmp (temp); | |
1492 | Fdo_auto_save (Qnil, Qnil); | |
1493 | restore_getcjmp (temp); | |
1494 | ||
1495 | /* If we have auto-saved and there is still no input | |
1496 | available, garbage collect if there has been enough | |
1497 | consing going on to make it worthwhile. */ | |
1498 | if (!detect_input_pending () | |
1499 | && consing_since_gc > gc_cons_threshold / 2) | |
7e85b935 RS |
1500 | { |
1501 | Fgarbage_collect (); | |
1502 | redisplay (); | |
1503 | } | |
7d6de002 RS |
1504 | } |
1505 | } | |
1506 | } | |
284f4730 JB |
1507 | |
1508 | /* Actually read a character, waiting if necessary. */ | |
4eb4f926 | 1509 | while (NILP (c)) |
1e12dd87 RS |
1510 | { |
1511 | c = kbd_buffer_get_event (); | |
1512 | if (!NILP (c)) | |
1513 | break; | |
1514 | if (commandflag >= 0 && !input_pending && !detect_input_pending ()) | |
1515 | redisplay (); | |
1516 | } | |
284f4730 | 1517 | |
284f4730 | 1518 | /* Terminate Emacs in batch mode if at eof. */ |
7d6de002 | 1519 | if (noninteractive && XTYPE (c) == Lisp_Int && XINT (c) < 0) |
284f4730 JB |
1520 | Fkill_emacs (make_number (1)); |
1521 | ||
80645119 JB |
1522 | if (XTYPE (c) == Lisp_Int) |
1523 | { | |
1524 | /* Add in any extra modifiers, where appropriate. */ | |
1525 | if ((extra_keyboard_modifiers & CHAR_CTL) | |
1526 | || ((extra_keyboard_modifiers & 0177) < ' ' | |
1527 | && (extra_keyboard_modifiers & 0177) != 0)) | |
faf5e407 | 1528 | XSETINT (c, make_ctrl_char (XINT (c))); |
80645119 JB |
1529 | |
1530 | /* Transfer any other modifier bits directly from | |
1531 | extra_keyboard_modifiers to c. Ignore the actual character code | |
1532 | in the low 16 bits of extra_keyboard_modifiers. */ | |
b8d9050d | 1533 | XSETINT (c, XINT (c) | (extra_keyboard_modifiers & ~0xff7f & ~CHAR_CTL)); |
80645119 | 1534 | } |
9fa4395d | 1535 | |
284f4730 JB |
1536 | non_reread: |
1537 | ||
f76475ad | 1538 | restore_getcjmp (save_jump); |
284f4730 JB |
1539 | |
1540 | start_polling (); | |
1541 | ||
1542 | echo_area_glyphs = 0; | |
1543 | ||
1544 | /* Handle things that only apply to characters. */ | |
1545 | if (XTYPE (c) == Lisp_Int) | |
1546 | { | |
1547 | /* If kbd_buffer_get_event gave us an EOF, return that. */ | |
86e5706b | 1548 | if (XINT (c) == -1) |
284f4730 JB |
1549 | return c; |
1550 | ||
284f4730 | 1551 | if (XTYPE (Vkeyboard_translate_table) == Lisp_String |
f4255cd1 JB |
1552 | && XSTRING (Vkeyboard_translate_table)->size > XFASTINT (c)) |
1553 | XSETINT (c, XSTRING (Vkeyboard_translate_table)->data[XFASTINT (c)]); | |
284f4730 JB |
1554 | } |
1555 | ||
1556 | total_keys++; | |
5160df46 JB |
1557 | XVECTOR (recent_keys)->contents[recent_keys_index] = c; |
1558 | if (++recent_keys_index >= NUM_RECENT_KEYS) | |
284f4730 JB |
1559 | recent_keys_index = 0; |
1560 | ||
1561 | /* Write c to the dribble file. If c is a lispy event, write | |
1562 | the event's symbol to the dribble file, in <brackets>. Bleaugh. | |
1563 | If you, dear reader, have a better idea, you've got the source. :-) */ | |
1564 | if (dribble) | |
1565 | { | |
1566 | if (XTYPE (c) == Lisp_Int) | |
f4255cd1 | 1567 | putc (XINT (c), dribble); |
284f4730 JB |
1568 | else |
1569 | { | |
1570 | Lisp_Object dribblee = c; | |
1571 | ||
1572 | /* If it's a structured event, take the event header. */ | |
88cb0656 | 1573 | dribblee = EVENT_HEAD (dribblee); |
284f4730 | 1574 | |
8f805655 | 1575 | if (XTYPE (dribblee) == Lisp_Symbol) |
284f4730 JB |
1576 | { |
1577 | putc ('<', dribble); | |
8f805655 JB |
1578 | fwrite (XSYMBOL (dribblee)->name->data, sizeof (char), |
1579 | XSYMBOL (dribblee)->name->size, | |
284f4730 JB |
1580 | dribble); |
1581 | putc ('>', dribble); | |
1582 | } | |
1583 | } | |
1584 | ||
1585 | fflush (dribble); | |
1586 | } | |
1587 | ||
1588 | store_kbd_macro_char (c); | |
1589 | ||
51172b6d RS |
1590 | num_nonmacro_input_chars++; |
1591 | ||
284f4730 JB |
1592 | from_macro: |
1593 | reread_first: | |
284f4730 | 1594 | |
4bb994d1 JB |
1595 | /* Record this character as part of the current key. |
1596 | Don't record mouse motion; it should never matter. */ | |
1597 | if (! (EVENT_HAS_PARAMETERS (c) | |
1598 | && EQ (EVENT_HEAD_KIND (EVENT_HEAD (c)), Qmouse_movement))) | |
7b4aedb9 JB |
1599 | { |
1600 | echo_char (c); | |
1601 | add_command_key (c); | |
1602 | } | |
284f4730 JB |
1603 | |
1604 | /* Re-reading in the middle of a command */ | |
1605 | reread: | |
1606 | last_input_char = c; | |
1607 | num_input_chars++; | |
1608 | ||
1609 | /* Process the help character specially if enabled */ | |
7e85b935 | 1610 | if (EQ (c, Vhelp_char) && !NILP (Vhelp_form)) |
284f4730 JB |
1611 | { |
1612 | Lisp_Object tem0; | |
1613 | count = specpdl_ptr - specpdl; | |
1614 | ||
1615 | record_unwind_protect (Fset_window_configuration, | |
1616 | Fcurrent_window_configuration (Qnil)); | |
1617 | ||
1618 | tem0 = Feval (Vhelp_form); | |
1619 | if (XTYPE (tem0) == Lisp_String) | |
1620 | internal_with_output_to_temp_buffer ("*Help*", print_help, tem0); | |
1621 | ||
1622 | cancel_echoing (); | |
6569cc8d | 1623 | c = read_char (0, 0, 0, Qnil, 0); |
ff11dfa1 | 1624 | /* Remove the help from the frame */ |
284f4730 JB |
1625 | unbind_to (count, Qnil); |
1626 | redisplay (); | |
1627 | if (EQ (c, make_number (040))) | |
1628 | { | |
1629 | cancel_echoing (); | |
7d6de002 | 1630 | c = read_char (0, 0, 0, Qnil, 0); |
284f4730 JB |
1631 | } |
1632 | } | |
1633 | ||
1634 | return c; | |
1635 | } | |
1636 | ||
1637 | Lisp_Object | |
1638 | print_help (object) | |
1639 | Lisp_Object object; | |
1640 | { | |
1641 | Fprinc (object, Qnil); | |
1642 | return Qnil; | |
1643 | } | |
1644 | ||
1645 | /* Copy out or in the info on where C-g should throw to. | |
1646 | This is used when running Lisp code from within get_char, | |
1647 | in case get_char is called recursively. | |
1648 | See read_process_output. */ | |
1649 | ||
1650 | save_getcjmp (temp) | |
1651 | jmp_buf temp; | |
1652 | { | |
1653 | bcopy (getcjmp, temp, sizeof getcjmp); | |
1654 | } | |
1655 | ||
1656 | restore_getcjmp (temp) | |
1657 | jmp_buf temp; | |
1658 | { | |
1659 | bcopy (temp, getcjmp, sizeof getcjmp); | |
1660 | } | |
1661 | ||
1662 | \f | |
1663 | /* Low level keyboard/mouse input. | |
1664 | kbd_buffer_store_event places events in kbd_buffer, and | |
1665 | kbd_buffer_get_event retrieves them. | |
1666 | mouse_moved indicates when the mouse has moved again, and | |
1667 | *mouse_position_hook provides the mouse position. */ | |
1668 | ||
1669 | /* Set this for debugging, to have a way to get out */ | |
1670 | int stop_character; | |
1671 | ||
ff11dfa1 | 1672 | extern int frame_garbaged; |
284f4730 JB |
1673 | |
1674 | /* Return true iff there are any events in the queue that read-char | |
1675 | would return. If this returns false, a read-char would block. */ | |
1676 | static int | |
1677 | readable_events () | |
1678 | { | |
88cb0656 | 1679 | return ! EVENT_QUEUES_EMPTY; |
284f4730 JB |
1680 | } |
1681 | ||
1682 | ||
1683 | /* Restore mouse tracking enablement. See Ftrack_mouse for the only use | |
1684 | of this function. */ | |
1685 | static Lisp_Object | |
1686 | tracking_off (old_value) | |
1687 | Lisp_Object old_value; | |
1688 | { | |
1689 | if (! XFASTINT (old_value)) | |
1690 | { | |
1691 | do_mouse_tracking = 0; | |
1692 | ||
1693 | /* Redisplay may have been preempted because there was input | |
1694 | available, and it assumes it will be called again after the | |
1695 | input has been processed. If the only input available was | |
1696 | the sort that we have just disabled, then we need to call | |
1697 | redisplay. */ | |
1698 | if (!readable_events ()) | |
1699 | { | |
1700 | redisplay_preserve_echo_area (); | |
1701 | get_input_pending (&input_pending); | |
1702 | } | |
1703 | } | |
1704 | } | |
1705 | ||
1706 | DEFUN ("track-mouse", Ftrack_mouse, Strack_mouse, 0, UNEVALLED, 0, | |
4bb994d1 JB |
1707 | "Evaluate BODY with mouse movement events enabled.\n\ |
1708 | Within a `track-mouse' form, mouse motion generates input events that\n\ | |
1709 | you can read with `read-event'.\n\ | |
1710 | Normally, mouse motion is ignored.") | |
284f4730 JB |
1711 | (args) |
1712 | Lisp_Object args; | |
1713 | { | |
1714 | int count = specpdl_ptr - specpdl; | |
1715 | Lisp_Object val; | |
1716 | ||
1717 | XSET (val, Lisp_Int, do_mouse_tracking); | |
1718 | record_unwind_protect (tracking_off, val); | |
1719 | ||
1720 | do_mouse_tracking = 1; | |
1721 | ||
1722 | val = Fprogn (args); | |
1723 | return unbind_to (count, val); | |
1724 | } | |
1725 | ||
1726 | /* Store an event obtained at interrupt level into kbd_buffer, fifo */ | |
1727 | ||
1728 | void | |
1729 | kbd_buffer_store_event (event) | |
1730 | register struct input_event *event; | |
1731 | { | |
1732 | if (event->kind == no_event) | |
1733 | abort (); | |
1734 | ||
1735 | if (event->kind == ascii_keystroke) | |
1736 | { | |
1737 | register int c = XFASTINT (event->code) & 0377; | |
1738 | ||
faf5e407 JB |
1739 | if (event->modifiers & ctrl_modifier) |
1740 | c = make_ctrl_char (c); | |
1741 | ||
86e5706b | 1742 | if (c == quit_char) |
284f4730 | 1743 | { |
3e51c7b7 JB |
1744 | extern SIGTYPE interrupt_signal (); |
1745 | ||
07d2b8de | 1746 | #ifdef MULTI_FRAME |
284f4730 | 1747 | /* If this results in a quit_char being returned to Emacs as |
3c370943 | 1748 | input, set Vlast_event_frame properly. If this doesn't |
284f4730 | 1749 | get returned to Emacs as an event, the next event read |
ff11dfa1 | 1750 | will set Vlast_event_frame again, so this is safe to do. */ |
4bb994d1 | 1751 | { |
7b4aedb9 JB |
1752 | Lisp_Object focus = |
1753 | FRAME_FOCUS_FRAME (XFRAME (event->frame_or_window)); | |
4bb994d1 JB |
1754 | |
1755 | if (NILP (focus)) | |
3c370943 | 1756 | internal_last_event_frame = event->frame_or_window; |
4bb994d1 | 1757 | else |
3c370943 JB |
1758 | internal_last_event_frame = focus; |
1759 | Vlast_event_frame = internal_last_event_frame; | |
4bb994d1 | 1760 | } |
07d2b8de | 1761 | #endif |
3e51c7b7 | 1762 | |
ffd56f97 | 1763 | last_event_timestamp = event->timestamp; |
284f4730 JB |
1764 | interrupt_signal (); |
1765 | return; | |
1766 | } | |
1767 | ||
1768 | if (c && c == stop_character) | |
1769 | { | |
1770 | sys_suspend (); | |
1771 | return; | |
1772 | } | |
1773 | ||
1774 | XSET (event->code, Lisp_Int, c); | |
1775 | } | |
1776 | ||
1777 | if (kbd_store_ptr - kbd_buffer == KBD_BUFFER_SIZE) | |
1778 | kbd_store_ptr = kbd_buffer; | |
1779 | ||
1780 | /* Don't let the very last slot in the buffer become full, | |
1781 | since that would make the two pointers equal, | |
1782 | and that is indistinguishable from an empty buffer. | |
1783 | Discard the event if it would fill the last slot. */ | |
1784 | if (kbd_fetch_ptr - 1 != kbd_store_ptr) | |
1785 | { | |
1786 | kbd_store_ptr->kind = event->kind; | |
1787 | kbd_store_ptr->code = event->code; | |
1788 | kbd_store_ptr->part = event->part; | |
7b4aedb9 | 1789 | kbd_store_ptr->frame_or_window = event->frame_or_window; |
284f4730 JB |
1790 | kbd_store_ptr->modifiers = event->modifiers; |
1791 | kbd_store_ptr->x = event->x; | |
1792 | kbd_store_ptr->y = event->y; | |
1793 | kbd_store_ptr->timestamp = event->timestamp; | |
7b4aedb9 JB |
1794 | (XVECTOR (kbd_buffer_frame_or_window)->contents[kbd_store_ptr |
1795 | - kbd_buffer] | |
1796 | = event->frame_or_window); | |
284f4730 JB |
1797 | |
1798 | kbd_store_ptr++; | |
1799 | } | |
1800 | } | |
1801 | ||
1802 | static Lisp_Object make_lispy_event (); | |
1803 | static Lisp_Object make_lispy_movement (); | |
1804 | static Lisp_Object modify_event_symbol (); | |
cd21b839 | 1805 | static Lisp_Object make_lispy_switch_frame (); |
284f4730 JB |
1806 | |
1807 | static Lisp_Object | |
1808 | kbd_buffer_get_event () | |
1809 | { | |
1810 | register int c; | |
1811 | Lisp_Object obj; | |
1812 | ||
1813 | if (noninteractive) | |
1814 | { | |
1815 | c = getchar (); | |
1816 | XSET (obj, Lisp_Int, c); | |
1817 | return obj; | |
1818 | } | |
1819 | ||
48e416d4 | 1820 | retry: |
284f4730 JB |
1821 | /* Wait until there is input available. */ |
1822 | for (;;) | |
1823 | { | |
284f4730 JB |
1824 | if (!EVENT_QUEUES_EMPTY) |
1825 | break; | |
1826 | ||
1827 | /* If the quit flag is set, then read_char will return | |
1828 | quit_char, so that counts as "available input." */ | |
1829 | if (!NILP (Vquit_flag)) | |
1830 | quit_throw_to_read_char (); | |
1831 | ||
1832 | /* One way or another, wait until input is available; then, if | |
1833 | interrupt handlers have not read it, read it now. */ | |
1834 | ||
1835 | #ifdef OLDVMS | |
1836 | wait_for_kbd_input (); | |
1837 | #else | |
1838 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
1839 | #ifdef SIGIO | |
1840 | gobble_input (0); | |
1841 | #endif /* SIGIO */ | |
1842 | if (EVENT_QUEUES_EMPTY) | |
1843 | { | |
f76475ad JB |
1844 | Lisp_Object minus_one; |
1845 | ||
1846 | XSET (minus_one, Lisp_Int, -1); | |
1847 | wait_reading_process_input (0, 0, minus_one, 1); | |
284f4730 JB |
1848 | |
1849 | if (!interrupt_input && EVENT_QUEUES_EMPTY) | |
1850 | { | |
1851 | read_avail_input (0); | |
1852 | } | |
1853 | } | |
1854 | #endif /* not VMS */ | |
1855 | } | |
1856 | ||
1857 | /* At this point, we know that there is a readable event available | |
1858 | somewhere. If the event queue is empty, then there must be a | |
1859 | mouse movement enabled and available. */ | |
1860 | if (kbd_fetch_ptr != kbd_store_ptr) | |
1861 | { | |
cd21b839 | 1862 | struct input_event *event; |
3e51c7b7 | 1863 | |
856bf263 | 1864 | event = ((kbd_fetch_ptr < kbd_buffer + KBD_BUFFER_SIZE) |
cd21b839 JB |
1865 | ? kbd_fetch_ptr |
1866 | : kbd_buffer); | |
3e51c7b7 | 1867 | |
cd21b839 | 1868 | last_event_timestamp = event->timestamp; |
cd21b839 | 1869 | |
4bb994d1 JB |
1870 | obj = Qnil; |
1871 | ||
48e416d4 RS |
1872 | /* These two kinds of events get special handling |
1873 | and don't actually appear to the command loop. */ | |
1874 | if (event->kind == selection_request_event) | |
1875 | { | |
598a9fa7 | 1876 | #ifdef HAVE_X11 |
48e416d4 RS |
1877 | x_handle_selection_request (event); |
1878 | kbd_fetch_ptr = event + 1; | |
598a9fa7 JB |
1879 | #else |
1880 | /* We're getting selection request events, but we don't have | |
1881 | a window system. */ | |
1882 | abort (); | |
1883 | #endif | |
48e416d4 RS |
1884 | } |
1885 | ||
1e12dd87 | 1886 | else if (event->kind == selection_clear_event) |
48e416d4 | 1887 | { |
598a9fa7 | 1888 | #ifdef HAVE_X11 |
48e416d4 RS |
1889 | x_handle_selection_clear (event); |
1890 | kbd_fetch_ptr = event + 1; | |
598a9fa7 JB |
1891 | #else |
1892 | /* We're getting selection request events, but we don't have | |
1893 | a window system. */ | |
1894 | abort (); | |
1895 | #endif | |
48e416d4 RS |
1896 | } |
1897 | ||
4bb994d1 JB |
1898 | /* If this event is on a different frame, return a switch-frame this |
1899 | time, and leave the event in the queue for next time. */ | |
1e12dd87 RS |
1900 | else |
1901 | { | |
a6d53864 | 1902 | #ifdef MULTI_FRAME |
1e12dd87 RS |
1903 | Lisp_Object frame = event->frame_or_window; |
1904 | Lisp_Object focus; | |
7b4aedb9 | 1905 | |
1e12dd87 RS |
1906 | if (XTYPE (frame) == Lisp_Window) |
1907 | frame = WINDOW_FRAME (XWINDOW (frame)); | |
4bb994d1 | 1908 | |
1e12dd87 RS |
1909 | focus = FRAME_FOCUS_FRAME (XFRAME (frame)); |
1910 | if (! NILP (focus)) | |
1911 | frame = focus; | |
07d2b8de | 1912 | |
1e12dd87 RS |
1913 | if (! EQ (frame, internal_last_event_frame) |
1914 | && XFRAME (frame) != selected_frame) | |
1915 | obj = make_lispy_switch_frame (frame); | |
1916 | internal_last_event_frame = frame; | |
a6d53864 | 1917 | #endif /* MULTI_FRAME */ |
4bb994d1 | 1918 | |
1e12dd87 RS |
1919 | /* If we didn't decide to make a switch-frame event, go ahead |
1920 | and build a real event from the queue entry. */ | |
cd21b839 | 1921 | |
1e12dd87 RS |
1922 | if (NILP (obj)) |
1923 | { | |
1924 | obj = make_lispy_event (event); | |
1925 | ||
1926 | /* Wipe out this event, to catch bugs. */ | |
1927 | event->kind = no_event; | |
1928 | (XVECTOR (kbd_buffer_frame_or_window)->contents[event - kbd_buffer] | |
1929 | = Qnil); | |
1930 | ||
1931 | kbd_fetch_ptr = event + 1; | |
1932 | } | |
4bb994d1 | 1933 | } |
284f4730 JB |
1934 | } |
1935 | else if (do_mouse_tracking && mouse_moved) | |
1936 | { | |
7e85b935 | 1937 | FRAME_PTR f = 0; |
7b4aedb9 | 1938 | Lisp_Object bar_window; |
3c370943 | 1939 | enum scroll_bar_part part; |
e5d77022 JB |
1940 | Lisp_Object x, y; |
1941 | unsigned long time; | |
284f4730 | 1942 | |
7b4aedb9 | 1943 | (*mouse_position_hook) (&f, &bar_window, &part, &x, &y, &time); |
4bb994d1 JB |
1944 | |
1945 | obj = Qnil; | |
284f4730 | 1946 | |
07d2b8de | 1947 | #ifdef MULTI_FRAME |
4bb994d1 JB |
1948 | /* Decide if we should generate a switch-frame event. Don't |
1949 | generate switch-frame events for motion outside of all Emacs | |
1950 | frames. */ | |
1951 | if (f) | |
cd21b839 | 1952 | { |
4bb994d1 JB |
1953 | Lisp_Object frame = FRAME_FOCUS_FRAME (f); |
1954 | ||
1955 | if (NILP (frame)) | |
1956 | XSET (frame, Lisp_Frame, f); | |
1957 | ||
80645119 JB |
1958 | if (! EQ (frame, internal_last_event_frame) |
1959 | && XFRAME (frame) != selected_frame) | |
764cb3f9 | 1960 | obj = make_lispy_switch_frame (frame); |
80645119 | 1961 | internal_last_event_frame = frame; |
cd21b839 | 1962 | } |
07d2b8de | 1963 | #endif |
4bb994d1 JB |
1964 | |
1965 | /* If we didn't decide to make a switch-frame event, go ahead and | |
1966 | return a mouse-motion event. */ | |
1967 | if (NILP (obj)) | |
7b4aedb9 | 1968 | obj = make_lispy_movement (f, bar_window, part, x, y, time); |
4bb994d1 | 1969 | } |
284f4730 JB |
1970 | else |
1971 | /* We were promised by the above while loop that there was | |
1972 | something for us to read! */ | |
1973 | abort (); | |
1974 | ||
1e12dd87 | 1975 | #if 0 |
48e416d4 RS |
1976 | /* If something gave back nil as the Lispy event, |
1977 | it means the event was discarded, so try again. */ | |
1978 | if (NILP (obj)) | |
1979 | goto retry; | |
1e12dd87 | 1980 | #endif |
48e416d4 | 1981 | |
284f4730 JB |
1982 | input_pending = readable_events (); |
1983 | ||
3c370943 JB |
1984 | #ifdef MULTI_FRAME |
1985 | Vlast_event_frame = internal_last_event_frame; | |
1986 | #endif | |
1987 | ||
284f4730 JB |
1988 | return (obj); |
1989 | } | |
1990 | ||
3a3b9632 RS |
1991 | /* Process any events that are not user-visible. */ |
1992 | ||
1993 | void | |
1994 | swallow_events () | |
1995 | { | |
1996 | while (kbd_fetch_ptr != kbd_store_ptr) | |
1997 | { | |
1998 | struct input_event *event; | |
1999 | ||
2000 | event = ((kbd_fetch_ptr < kbd_buffer + KBD_BUFFER_SIZE) | |
2001 | ? kbd_fetch_ptr | |
2002 | : kbd_buffer); | |
2003 | ||
2004 | last_event_timestamp = event->timestamp; | |
2005 | ||
2006 | /* These two kinds of events get special handling | |
2007 | and don't actually appear to the command loop. */ | |
2008 | if (event->kind == selection_request_event) | |
2009 | { | |
2010 | #ifdef HAVE_X11 | |
2011 | x_handle_selection_request (event); | |
2012 | kbd_fetch_ptr = event + 1; | |
2013 | #else | |
2014 | /* We're getting selection request events, but we don't have | |
2015 | a window system. */ | |
2016 | abort (); | |
2017 | #endif | |
2018 | } | |
2019 | ||
2020 | else if (event->kind == selection_clear_event) | |
2021 | { | |
2022 | #ifdef HAVE_X11 | |
2023 | x_handle_selection_clear (event); | |
2024 | kbd_fetch_ptr = event + 1; | |
2025 | #else | |
2026 | /* We're getting selection request events, but we don't have | |
2027 | a window system. */ | |
2028 | abort (); | |
2029 | #endif | |
2030 | } | |
2031 | else | |
2032 | break; | |
2033 | } | |
2034 | ||
2035 | get_input_pending (&input_pending); | |
2036 | } | |
4bb994d1 | 2037 | |
284f4730 JB |
2038 | /* Caches for modify_event_symbol. */ |
2039 | static Lisp_Object func_key_syms; | |
2040 | static Lisp_Object mouse_syms; | |
2041 | ||
2042 | /* You'll notice that this table is arranged to be conveniently | |
2043 | indexed by X Windows keysym values. */ | |
2044 | static char *lispy_function_keys[] = | |
2045 | { | |
2046 | /* X Keysym value */ | |
2047 | ||
a6d53864 | 2048 | "remove", 0, 0, 0, 0, 0, 0, 0, /* 0xff00 */ |
86e5706b RS |
2049 | "backspace", |
2050 | "tab", | |
2051 | "linefeed", | |
2052 | "clear", | |
2053 | 0, | |
2054 | "return", | |
2055 | 0, 0, | |
2056 | 0, 0, 0, /* 0xff10 */ | |
2057 | "pause", | |
2058 | 0, 0, 0, 0, 0, 0, 0, | |
2059 | "escape", | |
2060 | 0, 0, 0, 0, | |
2061 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff20...2f */ | |
2062 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff30...3f */ | |
2063 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff40...4f */ | |
2064 | ||
284f4730 JB |
2065 | "home", /* 0xff50 */ /* IsCursorKey */ |
2066 | "left", | |
2067 | "up", | |
2068 | "right", | |
2069 | "down", | |
2070 | "prior", | |
2071 | "next", | |
2072 | "end", | |
2073 | "begin", | |
2074 | 0, /* 0xff59 */ | |
2075 | 0, 0, 0, 0, 0, 0, | |
2076 | "select", /* 0xff60 */ /* IsMiscFunctionKey */ | |
2077 | "print", | |
2078 | "execute", | |
2079 | "insert", | |
2080 | 0, /* 0xff64 */ | |
2081 | "undo", | |
2082 | "redo", | |
2083 | "menu", | |
2084 | "find", | |
2085 | "cancel", | |
2086 | "help", | |
2087 | "break", /* 0xff6b */ | |
2088 | ||
2089 | /* Here are some keys found mostly on HP keyboards. The X event | |
2090 | handling code will strip bit 29, which flags vendor-specific | |
2091 | keysyms. */ | |
2092 | "reset", /* 0x1000ff6c */ | |
2093 | "system", | |
2094 | "user", | |
2095 | "clearline", | |
2096 | "insertline", | |
2097 | "deleteline", | |
2098 | "insertchar", | |
2099 | "deletechar", | |
2100 | "backtab", | |
36ae397e | 2101 | "kp-backtab", /* 0x1000ff75 */ |
284f4730 | 2102 | 0, /* 0xff76 */ |
36ae397e | 2103 | 0, 0, 0, 0, 0, 0, 0, 0, "kp-numlock", /* 0xff7f */ |
284f4730 JB |
2104 | "kp-space", /* 0xff80 */ /* IsKeypadKey */ |
2105 | 0, 0, 0, 0, 0, 0, 0, 0, | |
2106 | "kp-tab", /* 0xff89 */ | |
2107 | 0, 0, 0, | |
2108 | "kp-enter", /* 0xff8d */ | |
2109 | 0, 0, 0, | |
2110 | "kp-f1", /* 0xff91 */ | |
2111 | "kp-f2", | |
2112 | "kp-f3", | |
2113 | "kp-f4", | |
2114 | 0, /* 0xff95 */ | |
2115 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
2116 | "kp-multiply", /* 0xffaa */ | |
2117 | "kp-add", | |
2118 | "kp-separator", | |
2119 | "kp-subtract", | |
2120 | "kp-decimal", | |
2121 | "kp-divide", /* 0xffaf */ | |
2122 | "kp-0", /* 0xffb0 */ | |
2123 | "kp-1", "kp-2", "kp-3", "kp-4", "kp-5", "kp-6", "kp-7", "kp-8", "kp-9", | |
2124 | 0, /* 0xffba */ | |
2125 | 0, 0, | |
2126 | "kp-equal", /* 0xffbd */ | |
2127 | "f1", /* 0xffbe */ /* IsFunctionKey */ | |
86e5706b RS |
2128 | "f2", |
2129 | "f3", "f4", "f5", "f6", "f7", "f8", "f9", "f10", /* 0xffc0 */ | |
2130 | "f11", "f12", "f13", "f14", "f15", "f16", "f17", "f18", | |
2131 | "f19", "f20", "f21", "f22", "f23", "f24", "f25", "f26", /* 0xffd0 */ | |
2132 | "f27", "f28", "f29", "f30", "f31", "f32", "f33", "f34", | |
2133 | "f35", 0, 0, 0, 0, 0, 0, 0, /* 0xffe0 */ | |
2134 | 0, 0, 0, 0, 0, 0, 0, 0, | |
2135 | 0, 0, 0, 0, 0, 0, 0, 0, /* 0xfff0 */ | |
2136 | 0, 0, 0, 0, 0, 0, 0, "delete" | |
284f4730 JB |
2137 | }; |
2138 | ||
2139 | static char *lispy_mouse_names[] = | |
2140 | { | |
2141 | "mouse-1", "mouse-2", "mouse-3", "mouse-4", "mouse-5" | |
2142 | }; | |
2143 | ||
3c370943 | 2144 | /* Scroll bar parts. */ |
4bb994d1 JB |
2145 | Lisp_Object Qabove_handle, Qhandle, Qbelow_handle; |
2146 | ||
3c370943 JB |
2147 | /* An array of scroll bar parts, indexed by an enum scroll_bar_part value. */ |
2148 | Lisp_Object *scroll_bar_parts[] = { | |
4bb994d1 JB |
2149 | &Qabove_handle, &Qhandle, &Qbelow_handle |
2150 | }; | |
2151 | ||
2152 | ||
7b4aedb9 | 2153 | /* A vector, indexed by button number, giving the down-going location |
3c370943 | 2154 | of currently depressed buttons, both scroll bar and non-scroll bar. |
7b4aedb9 JB |
2155 | |
2156 | The elements have the form | |
2157 | (BUTTON-NUMBER MODIFIER-MASK . REST) | |
2158 | where REST is the cdr of a position as it would be reported in the event. | |
2159 | ||
2160 | The make_lispy_event function stores positions here to tell the | |
2161 | difference between click and drag events, and to store the starting | |
2162 | location to be included in drag events. */ | |
2163 | ||
2164 | static Lisp_Object button_down_location; | |
88cb0656 | 2165 | |
fbcd35bd JB |
2166 | /* Information about the most recent up-going button event: Which |
2167 | button, what location, and what time. */ | |
2168 | ||
2169 | static int button_up_button; | |
2170 | static int button_up_x; | |
2171 | static int button_up_y; | |
2172 | static unsigned long button_up_time; | |
2173 | ||
564dc952 JB |
2174 | /* The maximum time between clicks to make a double-click, |
2175 | or Qnil to disable double-click detection, | |
2176 | or Qt for no time limit. */ | |
2177 | Lisp_Object Vdouble_click_time; | |
fbcd35bd JB |
2178 | |
2179 | /* The number of clicks in this multiple-click. */ | |
2180 | ||
2181 | int double_click_count; | |
2182 | ||
284f4730 JB |
2183 | /* Given a struct input_event, build the lisp event which represents |
2184 | it. If EVENT is 0, build a mouse movement event from the mouse | |
88cb0656 JB |
2185 | movement buffer, which should have a movement event in it. |
2186 | ||
2187 | Note that events must be passed to this function in the order they | |
2188 | are received; this function stores the location of button presses | |
2189 | in order to build drag events when the button is released. */ | |
284f4730 JB |
2190 | |
2191 | static Lisp_Object | |
2192 | make_lispy_event (event) | |
2193 | struct input_event *event; | |
2194 | { | |
2195 | #ifdef SWITCH_ENUM_BUG | |
2196 | switch ((int) event->kind) | |
2197 | #else | |
2198 | switch (event->kind) | |
2199 | #endif | |
2200 | { | |
284f4730 JB |
2201 | /* A simple keystroke. */ |
2202 | case ascii_keystroke: | |
86e5706b RS |
2203 | { |
2204 | int c = XFASTINT (event->code); | |
5a1c6df8 JB |
2205 | /* Turn ASCII characters into control characters |
2206 | when proper. */ | |
2207 | if (event->modifiers & ctrl_modifier) | |
d205953b JB |
2208 | c = make_ctrl_char (c); |
2209 | ||
2210 | /* Add in the other modifier bits. We took care of ctrl_modifier | |
2211 | just above, and the shift key was taken care of by the X code, | |
2212 | and applied to control characters by make_ctrl_char. */ | |
86e5706b RS |
2213 | c |= (event->modifiers |
2214 | & (meta_modifier | alt_modifier | |
2215 | | hyper_modifier | super_modifier)); | |
fbcd35bd | 2216 | button_up_time = 0; |
86e5706b RS |
2217 | return c; |
2218 | } | |
284f4730 JB |
2219 | |
2220 | /* A function key. The symbol may need to have modifier prefixes | |
2221 | tacked onto it. */ | |
2222 | case non_ascii_keystroke: | |
fbcd35bd | 2223 | button_up_time = 0; |
284f4730 JB |
2224 | return modify_event_symbol (XFASTINT (event->code), event->modifiers, |
2225 | Qfunction_key, | |
2226 | lispy_function_keys, &func_key_syms, | |
2227 | (sizeof (lispy_function_keys) | |
2228 | / sizeof (lispy_function_keys[0]))); | |
2229 | break; | |
2230 | ||
88cb0656 JB |
2231 | /* A mouse click. Figure out where it is, decide whether it's |
2232 | a press, click or drag, and build the appropriate structure. */ | |
284f4730 | 2233 | case mouse_click: |
3c370943 | 2234 | case scroll_bar_click: |
284f4730 | 2235 | { |
0a7f1fc0 | 2236 | int button = XFASTINT (event->code); |
7b4aedb9 | 2237 | Lisp_Object position; |
dbc4e1c1 JB |
2238 | Lisp_Object *start_pos_ptr; |
2239 | Lisp_Object start_pos; | |
284f4730 | 2240 | |
7b4aedb9 | 2241 | if (button < 0 || button >= NUM_MOUSE_BUTTONS) |
88cb0656 JB |
2242 | abort (); |
2243 | ||
7b4aedb9 JB |
2244 | /* Build the position as appropriate for this mouse click. */ |
2245 | if (event->kind == mouse_click) | |
284f4730 | 2246 | { |
7b4aedb9 | 2247 | int part; |
598a9fa7 | 2248 | FRAME_PTR f = XFRAME (event->frame_or_window); |
5ec75a55 RS |
2249 | Lisp_Object window |
2250 | = window_from_coordinates (f, XINT (event->x), XINT (event->y), | |
2251 | &part); | |
7b4aedb9 JB |
2252 | Lisp_Object posn; |
2253 | ||
5ec75a55 RS |
2254 | if (XINT (event->y) < FRAME_MENU_BAR_LINES (f)) |
2255 | { | |
2256 | int hpos; | |
2257 | Lisp_Object items; | |
2258 | items = FRAME_MENU_BAR_ITEMS (f); | |
2259 | for (; CONSP (items); items = XCONS (items)->cdr) | |
2260 | { | |
2261 | Lisp_Object pos, string; | |
2262 | pos = Fcdr (Fcdr (Fcar (items))); | |
2263 | string = Fcar (Fcdr (Fcar (items))); | |
0a9b0670 RS |
2264 | if (XINT (event->x) >= XINT (pos) |
2265 | && XINT (event->x) < XINT (pos) + XSTRING (string)->size) | |
5ec75a55 RS |
2266 | break; |
2267 | } | |
2268 | position | |
2269 | = Fcons (event->frame_or_window, | |
2270 | Fcons (Qmenu_bar, | |
2271 | Fcons (Fcons (event->x, event->y), | |
2272 | Fcons (make_number (event->timestamp), | |
2273 | Qnil)))); | |
2274 | ||
2275 | if (CONSP (items)) | |
2276 | return Fcons (Fcar (Fcar (items)), | |
2277 | Fcons (position, Qnil)); | |
2278 | else | |
2279 | return Fcons (Qnil, Fcons (position, Qnil)); | |
2280 | } | |
2281 | else if (XTYPE (window) != Lisp_Window) | |
7b4aedb9 | 2282 | posn = Qnil; |
284f4730 | 2283 | else |
7b4aedb9 | 2284 | { |
dbc4e1c1 JB |
2285 | XSETINT (event->x, |
2286 | (XINT (event->x) - XINT (XWINDOW (window)->left))); | |
2287 | XSETINT (event->y, | |
2288 | (XINT (event->y) - XINT (XWINDOW (window)->top))); | |
2289 | ||
7b4aedb9 JB |
2290 | if (part == 1) |
2291 | posn = Qmode_line; | |
2292 | else if (part == 2) | |
2293 | posn = Qvertical_line; | |
2294 | else | |
dbc4e1c1 JB |
2295 | XSET (posn, Lisp_Int, |
2296 | buffer_posn_from_coords (XWINDOW (window), | |
2297 | XINT (event->x), | |
2298 | XINT (event->y))); | |
7b4aedb9 JB |
2299 | } |
2300 | ||
5ec75a55 RS |
2301 | position |
2302 | = Fcons (window, | |
2303 | Fcons (posn, | |
2304 | Fcons (Fcons (event->x, event->y), | |
2305 | Fcons (make_number (event->timestamp), | |
2306 | Qnil)))); | |
284f4730 | 2307 | } |
7b4aedb9 | 2308 | else |
88cb0656 | 2309 | { |
7b4aedb9 JB |
2310 | Lisp_Object window = event->frame_or_window; |
2311 | Lisp_Object portion_whole = Fcons (event->x, event->y); | |
3c370943 | 2312 | Lisp_Object part = *scroll_bar_parts[(int) event->part]; |
7b4aedb9 JB |
2313 | |
2314 | position = | |
2315 | Fcons (window, | |
3c370943 | 2316 | Fcons (Qvertical_scroll_bar, |
7b4aedb9 JB |
2317 | Fcons (portion_whole, |
2318 | Fcons (make_number (event->timestamp), | |
2319 | Fcons (part, | |
2320 | Qnil))))); | |
88cb0656 JB |
2321 | } |
2322 | ||
dbc4e1c1 JB |
2323 | start_pos_ptr = &XVECTOR (button_down_location)->contents[button]; |
2324 | ||
2325 | start_pos = *start_pos_ptr; | |
2326 | *start_pos_ptr = Qnil; | |
7b4aedb9 JB |
2327 | |
2328 | /* If this is a button press, squirrel away the location, so | |
2329 | we can decide later whether it was a click or a drag. */ | |
2330 | if (event->modifiers & down_modifier) | |
dbc4e1c1 | 2331 | *start_pos_ptr = Fcopy_alist (position); |
7b4aedb9 | 2332 | |
88cb0656 | 2333 | /* Now we're releasing a button - check the co-ordinates to |
7b4aedb9 | 2334 | see if this was a click or a drag. */ |
88cb0656 JB |
2335 | else if (event->modifiers & up_modifier) |
2336 | { | |
48e416d4 RS |
2337 | /* If we did not see a down before this up, |
2338 | ignore the up. Probably this happened because | |
2339 | the down event chose a menu item. | |
2340 | It would be an annoyance to treat the release | |
2341 | of the button that chose the menu item | |
2342 | as a separate event. */ | |
2343 | ||
2344 | if (XTYPE (start_pos) != Lisp_Cons) | |
2345 | return Qnil; | |
2346 | ||
88cb0656 | 2347 | event->modifiers &= ~up_modifier; |
48e416d4 | 2348 | #if 0 /* Formerly we treated an up with no down as a click event. */ |
dbc4e1c1 JB |
2349 | if (XTYPE (start_pos) != Lisp_Cons) |
2350 | event->modifiers |= click_modifier; | |
2351 | else | |
48e416d4 | 2352 | #endif |
dbc4e1c1 JB |
2353 | { |
2354 | /* The third element of every position should be the (x,y) | |
2355 | pair. */ | |
2356 | Lisp_Object down = Fnth (make_number (2), start_pos); | |
2357 | ||
fbcd35bd JB |
2358 | if (EQ (event->x, XCONS (down)->car) |
2359 | && EQ (event->y, XCONS (down)->cdr)) | |
2360 | { | |
2361 | if (button == button_up_button | |
2362 | && XINT (event->x) == button_up_x | |
2363 | && XINT (event->y) == button_up_y | |
2364 | && button_up_time != 0 | |
564dc952 JB |
2365 | && (EQ (Vdouble_click_time, Qt) |
2366 | || (INTEGERP (Vdouble_click_time) | |
2367 | && ((int)(event->timestamp - button_up_time) | |
2368 | < XINT (Vdouble_click_time))))) | |
fbcd35bd JB |
2369 | { |
2370 | double_click_count++; | |
2371 | event->modifiers |= ((double_click_count > 2) | |
2372 | ? triple_modifier | |
2373 | : double_modifier); | |
2374 | } | |
2375 | else | |
2376 | { | |
2377 | double_click_count = 1; | |
2378 | event->modifiers |= click_modifier; | |
2379 | } | |
2380 | button_up_button = button; | |
2381 | button_up_x = XINT (event->x); | |
2382 | button_up_y = XINT (event->y); | |
2383 | button_up_time = event->timestamp; | |
2384 | } | |
2385 | else | |
2386 | { | |
2387 | button_up_time = 0; | |
2388 | event->modifiers |= drag_modifier; | |
2389 | } | |
dbc4e1c1 | 2390 | } |
88cb0656 JB |
2391 | } |
2392 | else | |
2393 | /* Every mouse event should either have the down_modifier or | |
7b4aedb9 | 2394 | the up_modifier set. */ |
88cb0656 JB |
2395 | abort (); |
2396 | ||
88cb0656 | 2397 | { |
7b4aedb9 | 2398 | /* Get the symbol we should use for the mouse click. */ |
5ec75a55 RS |
2399 | Lisp_Object head |
2400 | = modify_event_symbol (button, | |
2401 | event->modifiers, | |
2402 | Qmouse_click, | |
2403 | lispy_mouse_names, &mouse_syms, | |
2404 | (sizeof (lispy_mouse_names) | |
2405 | / sizeof (lispy_mouse_names[0]))); | |
7b4aedb9 | 2406 | |
88cb0656 | 2407 | if (event->modifiers & drag_modifier) |
dbc4e1c1 JB |
2408 | return Fcons (head, |
2409 | Fcons (start_pos, | |
2410 | Fcons (position, | |
2411 | Qnil))); | |
fbcd35bd JB |
2412 | else if (event->modifiers & (double_modifier | triple_modifier)) |
2413 | return Fcons (head, | |
2414 | Fcons (position, | |
2415 | Fcons (make_number (double_click_count), | |
2416 | Qnil))); | |
88cb0656 JB |
2417 | else |
2418 | return Fcons (head, | |
7b4aedb9 | 2419 | Fcons (position, |
88cb0656 JB |
2420 | Qnil)); |
2421 | } | |
284f4730 JB |
2422 | } |
2423 | ||
284f4730 JB |
2424 | /* The 'kind' field of the event is something we don't recognize. */ |
2425 | default: | |
48e416d4 | 2426 | abort (); |
284f4730 JB |
2427 | } |
2428 | } | |
2429 | ||
2430 | static Lisp_Object | |
7b4aedb9 | 2431 | make_lispy_movement (frame, bar_window, part, x, y, time) |
ff11dfa1 | 2432 | FRAME_PTR frame; |
7b4aedb9 | 2433 | Lisp_Object bar_window; |
3c370943 | 2434 | enum scroll_bar_part part; |
284f4730 | 2435 | Lisp_Object x, y; |
e5d77022 | 2436 | unsigned long time; |
284f4730 | 2437 | { |
3c370943 | 2438 | /* Is it a scroll bar movement? */ |
7b4aedb9 | 2439 | if (frame && ! NILP (bar_window)) |
4bb994d1 | 2440 | { |
3c370943 | 2441 | Lisp_Object part_sym = *scroll_bar_parts[(int) part]; |
4bb994d1 | 2442 | |
3c370943 | 2443 | return Fcons (Qscroll_bar_movement, |
7b4aedb9 | 2444 | (Fcons (Fcons (bar_window, |
3c370943 | 2445 | Fcons (Qvertical_scroll_bar, |
4bb994d1 JB |
2446 | Fcons (Fcons (x, y), |
2447 | Fcons (make_number (time), | |
cb5df6ae | 2448 | Fcons (part_sym, |
4bb994d1 JB |
2449 | Qnil))))), |
2450 | Qnil))); | |
2451 | } | |
2452 | ||
2453 | /* Or is it an ordinary mouse movement? */ | |
284f4730 JB |
2454 | else |
2455 | { | |
4bb994d1 JB |
2456 | int area; |
2457 | Lisp_Object window = | |
2458 | (frame | |
2459 | ? window_from_coordinates (frame, XINT (x), XINT (y), &area) | |
2460 | : Qnil); | |
2461 | Lisp_Object posn; | |
2462 | ||
2463 | if (XTYPE (window) == Lisp_Window) | |
2464 | { | |
2465 | XSETINT (x, XINT (x) - XINT (XWINDOW (window)->left)); | |
2466 | XSETINT (y, XINT (y) - XINT (XWINDOW (window)->top)); | |
2467 | ||
2468 | if (area == 1) | |
2469 | posn = Qmode_line; | |
2470 | else if (area == 2) | |
2471 | posn = Qvertical_line; | |
2472 | else | |
2473 | XSET (posn, Lisp_Int, | |
2474 | buffer_posn_from_coords (XWINDOW (window), | |
2475 | XINT (x), XINT (y))); | |
2476 | } | |
284f4730 | 2477 | else |
4bb994d1 JB |
2478 | { |
2479 | window = Qnil; | |
2480 | posn = Qnil; | |
f76b81d6 JB |
2481 | XFASTINT (x) = 0; |
2482 | XFASTINT (y) = 0; | |
4bb994d1 | 2483 | } |
284f4730 | 2484 | |
4bb994d1 JB |
2485 | return Fcons (Qmouse_movement, |
2486 | Fcons (Fcons (window, | |
2487 | Fcons (posn, | |
2488 | Fcons (Fcons (x, y), | |
2489 | Fcons (make_number (time), | |
2490 | Qnil)))), | |
2491 | Qnil)); | |
2492 | } | |
284f4730 JB |
2493 | } |
2494 | ||
cd21b839 JB |
2495 | /* Construct a switch frame event. */ |
2496 | static Lisp_Object | |
2497 | make_lispy_switch_frame (frame) | |
2498 | Lisp_Object frame; | |
2499 | { | |
2500 | return Fcons (Qswitch_frame, Fcons (frame, Qnil)); | |
2501 | } | |
0a7f1fc0 JB |
2502 | \f |
2503 | /* Manipulating modifiers. */ | |
284f4730 | 2504 | |
0a7f1fc0 | 2505 | /* Parse the name of SYMBOL, and return the set of modifiers it contains. |
284f4730 | 2506 | |
0a7f1fc0 JB |
2507 | If MODIFIER_END is non-zero, set *MODIFIER_END to the position in |
2508 | SYMBOL's name of the end of the modifiers; the string from this | |
2509 | position is the unmodified symbol name. | |
284f4730 | 2510 | |
0a7f1fc0 JB |
2511 | This doesn't use any caches. */ |
2512 | static int | |
2513 | parse_modifiers_uncached (symbol, modifier_end) | |
284f4730 | 2514 | Lisp_Object symbol; |
0a7f1fc0 | 2515 | int *modifier_end; |
284f4730 JB |
2516 | { |
2517 | struct Lisp_String *name; | |
2518 | int i; | |
2519 | int modifiers; | |
284f4730 JB |
2520 | |
2521 | CHECK_SYMBOL (symbol, 1); | |
2522 | ||
2523 | modifiers = 0; | |
2524 | name = XSYMBOL (symbol)->name; | |
2525 | ||
284f4730 | 2526 | |
0a7f1fc0 | 2527 | for (i = 0; i+2 <= name->size; ) |
284f4730 JB |
2528 | switch (name->data[i]) |
2529 | { | |
0a7f1fc0 JB |
2530 | #define SINGLE_LETTER_MOD(bit) \ |
2531 | if (name->data[i+1] != '-') \ | |
2532 | goto no_more_modifiers; \ | |
2533 | modifiers |= bit; \ | |
fce33686 | 2534 | i += 2; |
0a7f1fc0 JB |
2535 | |
2536 | case 'A': | |
2537 | SINGLE_LETTER_MOD (alt_modifier); | |
284f4730 JB |
2538 | break; |
2539 | ||
2540 | case 'C': | |
0a7f1fc0 | 2541 | SINGLE_LETTER_MOD (ctrl_modifier); |
fce33686 JB |
2542 | break; |
2543 | ||
2544 | case 'H': | |
0a7f1fc0 | 2545 | SINGLE_LETTER_MOD (hyper_modifier); |
fce33686 JB |
2546 | break; |
2547 | ||
2548 | case 'M': | |
0a7f1fc0 | 2549 | SINGLE_LETTER_MOD (meta_modifier); |
284f4730 JB |
2550 | break; |
2551 | ||
2552 | case 'S': | |
0a7f1fc0 | 2553 | SINGLE_LETTER_MOD (shift_modifier); |
fce33686 JB |
2554 | break; |
2555 | ||
2556 | case 's': | |
86e5706b | 2557 | SINGLE_LETTER_MOD (super_modifier); |
284f4730 JB |
2558 | break; |
2559 | ||
fce33686 JB |
2560 | case 'd': |
2561 | if (i + 5 > name->size) | |
2562 | goto no_more_modifiers; | |
2563 | if (! strncmp (name->data + i, "drag-", 5)) | |
2564 | { | |
fce33686 JB |
2565 | modifiers |= drag_modifier; |
2566 | i += 5; | |
2567 | } | |
2568 | else if (! strncmp (name->data + i, "down-", 5)) | |
2569 | { | |
fce33686 JB |
2570 | modifiers |= down_modifier; |
2571 | i += 5; | |
2572 | } | |
fbcd35bd JB |
2573 | else if (i + 7 <= name->size |
2574 | && ! strncmp (name->data + i, "double-", 7)) | |
2575 | { | |
2576 | modifiers |= double_modifier; | |
2577 | i += 7; | |
2578 | } | |
2579 | else | |
2580 | goto no_more_modifiers; | |
2581 | break; | |
2582 | ||
2583 | case 't': | |
2584 | if (i + 7 > name->size) | |
2585 | goto no_more_modifiers; | |
2586 | if (! strncmp (name->data + i, "triple-", 7)) | |
2587 | { | |
2588 | modifiers |= triple_modifier; | |
2589 | i += 7; | |
2590 | } | |
fce33686 JB |
2591 | else |
2592 | goto no_more_modifiers; | |
284f4730 JB |
2593 | break; |
2594 | ||
2595 | default: | |
2596 | goto no_more_modifiers; | |
0a7f1fc0 JB |
2597 | |
2598 | #undef SINGLE_LETTER_MOD | |
284f4730 JB |
2599 | } |
2600 | no_more_modifiers: | |
2601 | ||
0a7f1fc0 | 2602 | /* Should we include the `click' modifier? */ |
fbcd35bd JB |
2603 | if (! (modifiers & (down_modifier | drag_modifier |
2604 | | double_modifier | triple_modifier)) | |
0a7f1fc0 | 2605 | && i + 7 == name->size |
4bb994d1 | 2606 | && strncmp (name->data + i, "mouse-", 6) == 0 |
6569cc8d | 2607 | && ('0' <= name->data[i + 6] && name->data[i + 6] <= '9')) |
0a7f1fc0 JB |
2608 | modifiers |= click_modifier; |
2609 | ||
2610 | if (modifier_end) | |
2611 | *modifier_end = i; | |
2612 | ||
2613 | return modifiers; | |
2614 | } | |
2615 | ||
2616 | ||
2617 | /* Return a symbol whose name is the modifier prefixes for MODIFIERS | |
2618 | prepended to the string BASE[0..BASE_LEN-1]. | |
2619 | This doesn't use any caches. */ | |
2620 | static Lisp_Object | |
2621 | apply_modifiers_uncached (modifiers, base, base_len) | |
2622 | int modifiers; | |
2623 | char *base; | |
2624 | int base_len; | |
2625 | { | |
2626 | /* Since BASE could contain nulls, we can't use intern here; we have | |
2627 | to use Fintern, which expects a genuine Lisp_String, and keeps a | |
2628 | reference to it. */ | |
2629 | char *new_mods = | |
fbcd35bd | 2630 | (char *) alloca (sizeof ("A-C-H-M-S-s-down-drag-double-triple-")); |
0a7f1fc0 | 2631 | int mod_len; |
284f4730 | 2632 | |
284f4730 | 2633 | { |
0a7f1fc0 JB |
2634 | char *p = new_mods; |
2635 | ||
2636 | /* Only the event queue may use the `up' modifier; it should always | |
2637 | be turned into a click or drag event before presented to lisp code. */ | |
2638 | if (modifiers & up_modifier) | |
2639 | abort (); | |
2640 | ||
2641 | if (modifiers & alt_modifier) { *p++ = 'A'; *p++ = '-'; } | |
2642 | if (modifiers & ctrl_modifier) { *p++ = 'C'; *p++ = '-'; } | |
2643 | if (modifiers & hyper_modifier) { *p++ = 'H'; *p++ = '-'; } | |
2644 | if (modifiers & meta_modifier) { *p++ = 'M'; *p++ = '-'; } | |
2645 | if (modifiers & shift_modifier) { *p++ = 'S'; *p++ = '-'; } | |
86e5706b | 2646 | if (modifiers & super_modifier) { *p++ = 's'; *p++ = '-'; } |
0a7f1fc0 JB |
2647 | if (modifiers & down_modifier) { strcpy (p, "down-"); p += 5; } |
2648 | if (modifiers & drag_modifier) { strcpy (p, "drag-"); p += 5; } | |
fbcd35bd JB |
2649 | if (modifiers & double_modifier) { strcpy (p, "double-"); p += 7; } |
2650 | if (modifiers & triple_modifier) { strcpy (p, "triple-"); p += 7; } | |
0a7f1fc0 JB |
2651 | /* The click modifier is denoted by the absence of other modifiers. */ |
2652 | ||
2653 | *p = '\0'; | |
2654 | ||
2655 | mod_len = p - new_mods; | |
2656 | } | |
284f4730 | 2657 | |
0a7f1fc0 JB |
2658 | { |
2659 | Lisp_Object new_name = make_uninit_string (mod_len + base_len); | |
2660 | ||
2661 | bcopy (new_mods, XSTRING (new_name)->data, mod_len); | |
2662 | bcopy (base, XSTRING (new_name)->data + mod_len, base_len); | |
284f4730 JB |
2663 | |
2664 | return Fintern (new_name, Qnil); | |
2665 | } | |
2666 | } | |
2667 | ||
2668 | ||
0a7f1fc0 JB |
2669 | static char *modifier_names[] = |
2670 | { | |
fbcd35bd | 2671 | "up", "down", "drag", "click", "double", "triple", 0, 0, |
1dfdf9e2 | 2672 | 0, 0, 0, 0, 0, 0, 0, 0, |
86e5706b | 2673 | 0, 0, "alt", "super", "hyper", "shift", "control", "meta" |
0a7f1fc0 | 2674 | }; |
80645119 | 2675 | #define NUM_MOD_NAMES (sizeof (modifier_names) / sizeof (modifier_names[0])) |
0a7f1fc0 JB |
2676 | |
2677 | static Lisp_Object modifier_symbols; | |
2678 | ||
2679 | /* Return the list of modifier symbols corresponding to the mask MODIFIERS. */ | |
2680 | static Lisp_Object | |
2681 | lispy_modifier_list (modifiers) | |
2682 | int modifiers; | |
2683 | { | |
2684 | Lisp_Object modifier_list; | |
2685 | int i; | |
2686 | ||
2687 | modifier_list = Qnil; | |
80645119 | 2688 | for (i = 0; (1<<i) <= modifiers && i < NUM_MOD_NAMES; i++) |
0a7f1fc0 | 2689 | if (modifiers & (1<<i)) |
80645119 JB |
2690 | modifier_list = Fcons (XVECTOR (modifier_symbols)->contents[i], |
2691 | modifier_list); | |
0a7f1fc0 JB |
2692 | |
2693 | return modifier_list; | |
2694 | } | |
2695 | ||
2696 | ||
2697 | /* Parse the modifiers on SYMBOL, and return a list like (UNMODIFIED MASK), | |
2698 | where UNMODIFIED is the unmodified form of SYMBOL, | |
2699 | MASK is the set of modifiers present in SYMBOL's name. | |
2700 | This is similar to parse_modifiers_uncached, but uses the cache in | |
2701 | SYMBOL's Qevent_symbol_element_mask property, and maintains the | |
2702 | Qevent_symbol_elements property. */ | |
2703 | static Lisp_Object | |
2704 | parse_modifiers (symbol) | |
2705 | Lisp_Object symbol; | |
2706 | { | |
2707 | Lisp_Object elements = Fget (symbol, Qevent_symbol_element_mask); | |
2708 | ||
2709 | if (CONSP (elements)) | |
2710 | return elements; | |
2711 | else | |
2712 | { | |
2713 | int end; | |
2714 | int modifiers = parse_modifiers_uncached (symbol, &end); | |
2715 | Lisp_Object unmodified | |
2716 | = Fintern (make_string (XSYMBOL (symbol)->name->data + end, | |
2717 | XSYMBOL (symbol)->name->size - end), | |
2718 | Qnil); | |
2719 | Lisp_Object mask; | |
2720 | ||
734fef94 JB |
2721 | if (modifiers & ~((1<<VALBITS) - 1)) |
2722 | abort (); | |
0a7f1fc0 JB |
2723 | XFASTINT (mask) = modifiers; |
2724 | elements = Fcons (unmodified, Fcons (mask, Qnil)); | |
2725 | ||
2726 | /* Cache the parsing results on SYMBOL. */ | |
2727 | Fput (symbol, Qevent_symbol_element_mask, | |
2728 | elements); | |
2729 | Fput (symbol, Qevent_symbol_elements, | |
2730 | Fcons (unmodified, lispy_modifier_list (modifiers))); | |
2731 | ||
2732 | /* Since we know that SYMBOL is modifiers applied to unmodified, | |
2733 | it would be nice to put that in unmodified's cache. | |
2734 | But we can't, since we're not sure that parse_modifiers is | |
2735 | canonical. */ | |
2736 | ||
2737 | return elements; | |
2738 | } | |
2739 | } | |
2740 | ||
2741 | /* Apply the modifiers MODIFIERS to the symbol BASE. | |
2742 | BASE must be unmodified. | |
2743 | ||
2744 | This is like apply_modifiers_uncached, but uses BASE's | |
2745 | Qmodifier_cache property, if present. It also builds | |
cd21b839 JB |
2746 | Qevent_symbol_elements properties, since it has that info anyway. |
2747 | ||
2748 | apply_modifiers copies the value of BASE's Qevent_kind property to | |
2749 | the modified symbol. */ | |
0a7f1fc0 JB |
2750 | static Lisp_Object |
2751 | apply_modifiers (modifiers, base) | |
2752 | int modifiers; | |
2753 | Lisp_Object base; | |
2754 | { | |
7b4aedb9 | 2755 | Lisp_Object cache, index, entry, new_symbol; |
0a7f1fc0 | 2756 | |
80645119 JB |
2757 | /* Mask out upper bits. We don't know where this value's been. */ |
2758 | modifiers &= (1<<VALBITS) - 1; | |
2759 | ||
0a7f1fc0 | 2760 | /* The click modifier never figures into cache indices. */ |
0a7f1fc0 | 2761 | cache = Fget (base, Qmodifier_cache); |
cd21b839 | 2762 | XFASTINT (index) = (modifiers & ~click_modifier); |
0a7f1fc0 JB |
2763 | entry = Fassq (index, cache); |
2764 | ||
2765 | if (CONSP (entry)) | |
7b4aedb9 JB |
2766 | new_symbol = XCONS (entry)->cdr; |
2767 | else | |
2768 | { | |
2769 | /* We have to create the symbol ourselves. */ | |
2770 | new_symbol = apply_modifiers_uncached (modifiers, | |
2771 | XSYMBOL (base)->name->data, | |
2772 | XSYMBOL (base)->name->size); | |
2773 | ||
2774 | /* Add the new symbol to the base's cache. */ | |
2775 | entry = Fcons (index, new_symbol); | |
2776 | Fput (base, Qmodifier_cache, Fcons (entry, cache)); | |
2777 | ||
2778 | /* We have the parsing info now for free, so add it to the caches. */ | |
2779 | XFASTINT (index) = modifiers; | |
2780 | Fput (new_symbol, Qevent_symbol_element_mask, | |
2781 | Fcons (base, Fcons (index, Qnil))); | |
2782 | Fput (new_symbol, Qevent_symbol_elements, | |
2783 | Fcons (base, lispy_modifier_list (modifiers))); | |
2784 | } | |
0a7f1fc0 | 2785 | |
7b4aedb9 JB |
2786 | /* Make sure this symbol is of the same kind as BASE. |
2787 | ||
2788 | You'd think we could just set this once and for all when we | |
2789 | intern the symbol above, but reorder_modifiers may call us when | |
2790 | BASE's property isn't set right; we can't assume that just | |
80645119 JB |
2791 | because it has a Qmodifier_cache property it must have its |
2792 | Qevent_kind set right as well. */ | |
7b4aedb9 JB |
2793 | if (NILP (Fget (new_symbol, Qevent_kind))) |
2794 | { | |
2795 | Lisp_Object kind = Fget (base, Qevent_kind); | |
2796 | ||
2797 | if (! NILP (kind)) | |
2798 | Fput (new_symbol, Qevent_kind, kind); | |
2799 | } | |
2800 | ||
2801 | return new_symbol; | |
0a7f1fc0 JB |
2802 | } |
2803 | ||
2804 | ||
2805 | /* Given a symbol whose name begins with modifiers ("C-", "M-", etc), | |
2806 | return a symbol with the modifiers placed in the canonical order. | |
2807 | Canonical order is alphabetical, except for down and drag, which | |
2808 | always come last. The 'click' modifier is never written out. | |
2809 | ||
2810 | Fdefine_key calls this to make sure that (for example) C-M-foo | |
2811 | and M-C-foo end up being equivalent in the keymap. */ | |
2812 | ||
2813 | Lisp_Object | |
2814 | reorder_modifiers (symbol) | |
2815 | Lisp_Object symbol; | |
2816 | { | |
2817 | /* It's hopefully okay to write the code this way, since everything | |
2818 | will soon be in caches, and no consing will be done at all. */ | |
2819 | Lisp_Object parsed = parse_modifiers (symbol); | |
2820 | ||
2821 | return apply_modifiers (XCONS (XCONS (parsed)->cdr)->car, | |
2822 | XCONS (parsed)->car); | |
2823 | } | |
2824 | ||
2825 | ||
284f4730 JB |
2826 | /* For handling events, we often want to produce a symbol whose name |
2827 | is a series of modifier key prefixes ("M-", "C-", etcetera) attached | |
2828 | to some base, like the name of a function key or mouse button. | |
2829 | modify_event_symbol produces symbols of this sort. | |
2830 | ||
2831 | NAME_TABLE should point to an array of strings, such that NAME_TABLE[i] | |
2832 | is the name of the i'th symbol. TABLE_SIZE is the number of elements | |
2833 | in the table. | |
2834 | ||
2835 | SYMBOL_TABLE should be a pointer to a Lisp_Object whose value will | |
2836 | persist between calls to modify_event_symbol that it can use to | |
2837 | store a cache of the symbols it's generated for this NAME_TABLE | |
2838 | before. | |
2839 | ||
2840 | SYMBOL_NUM is the number of the base name we want from NAME_TABLE. | |
2841 | ||
2842 | MODIFIERS is a set of modifier bits (as given in struct input_events) | |
2843 | whose prefixes should be applied to the symbol name. | |
2844 | ||
2845 | SYMBOL_KIND is the value to be placed in the event_kind property of | |
88cb0656 JB |
2846 | the returned symbol. |
2847 | ||
2848 | The symbols we create are supposed to have an | |
eb8c3be9 | 2849 | `event-symbol-elements' property, which lists the modifiers present |
88cb0656 JB |
2850 | in the symbol's name. */ |
2851 | ||
284f4730 JB |
2852 | static Lisp_Object |
2853 | modify_event_symbol (symbol_num, modifiers, symbol_kind, name_table, | |
2854 | symbol_table, table_size) | |
2855 | int symbol_num; | |
2856 | unsigned modifiers; | |
2857 | Lisp_Object symbol_kind; | |
2858 | char **name_table; | |
2859 | Lisp_Object *symbol_table; | |
2860 | int table_size; | |
2861 | { | |
88cb0656 | 2862 | Lisp_Object *slot; |
284f4730 JB |
2863 | |
2864 | /* Is this a request for a valid symbol? */ | |
88cb0656 | 2865 | if (symbol_num < 0 || symbol_num >= table_size) |
284f4730 JB |
2866 | abort (); |
2867 | ||
0a7f1fc0 | 2868 | /* If *symbol_table doesn't seem to be initialized properly, fix that. |
88cb0656 | 2869 | *symbol_table should be a lisp vector TABLE_SIZE elements long, |
4bb994d1 JB |
2870 | where the Nth element is the symbol for NAME_TABLE[N], or nil if |
2871 | we've never used that symbol before. */ | |
284f4730 JB |
2872 | if (XTYPE (*symbol_table) != Lisp_Vector |
2873 | || XVECTOR (*symbol_table)->size != table_size) | |
88cb0656 | 2874 | { |
0a7f1fc0 JB |
2875 | Lisp_Object size; |
2876 | ||
2877 | XFASTINT (size) = table_size; | |
2878 | *symbol_table = Fmake_vector (size, Qnil); | |
88cb0656 | 2879 | } |
284f4730 | 2880 | |
88cb0656 | 2881 | slot = & XVECTOR (*symbol_table)->contents[symbol_num]; |
284f4730 | 2882 | |
0a7f1fc0 JB |
2883 | /* Have we already used this symbol before? */ |
2884 | if (NILP (*slot)) | |
284f4730 | 2885 | { |
0a7f1fc0 | 2886 | /* No; let's create it. */ |
d1f50460 RS |
2887 | if (name_table[symbol_num]) |
2888 | *slot = intern (name_table[symbol_num]); | |
2889 | else | |
2890 | { | |
2891 | char buf[20]; | |
2892 | sprintf (buf, "key-%d", symbol_num); | |
2893 | *slot = intern (buf); | |
2894 | } | |
0a7f1fc0 JB |
2895 | |
2896 | /* Fill in the cache entries for this symbol; this also | |
2897 | builds the Qevent_symbol_elements property, which the user | |
2898 | cares about. */ | |
6569cc8d | 2899 | apply_modifiers (modifiers & click_modifier, *slot); |
0a7f1fc0 | 2900 | Fput (*slot, Qevent_kind, symbol_kind); |
284f4730 | 2901 | } |
88cb0656 | 2902 | |
0a7f1fc0 JB |
2903 | /* Apply modifiers to that symbol. */ |
2904 | return apply_modifiers (modifiers, *slot); | |
284f4730 | 2905 | } |
0a7f1fc0 | 2906 | |
284f4730 | 2907 | \f |
284f4730 JB |
2908 | /* Store into *addr a value nonzero if terminal input chars are available. |
2909 | Serves the purpose of ioctl (0, FIONREAD, addr) | |
2910 | but works even if FIONREAD does not exist. | |
2911 | (In fact, this may actually read some input.) */ | |
2912 | ||
2913 | static void | |
2914 | get_input_pending (addr) | |
2915 | int *addr; | |
2916 | { | |
2917 | /* First of all, have we already counted some input? */ | |
2918 | *addr = !NILP (Vquit_flag) || readable_events (); | |
2919 | ||
2920 | /* If input is being read as it arrives, and we have none, there is none. */ | |
2921 | if (*addr > 0 || (interrupt_input && ! interrupts_deferred)) | |
2922 | return; | |
2923 | ||
2924 | /* Try to read some input and see how much we get. */ | |
2925 | gobble_input (0); | |
2926 | *addr = !NILP (Vquit_flag) || readable_events (); | |
2927 | } | |
2928 | ||
2929 | /* Interface to read_avail_input, blocking SIGIO if necessary. */ | |
2930 | ||
2931 | int | |
2932 | gobble_input (expected) | |
2933 | int expected; | |
2934 | { | |
2935 | #ifndef VMS | |
2936 | #ifdef SIGIO | |
2937 | if (interrupt_input) | |
2938 | { | |
32676c08 | 2939 | SIGMASKTYPE mask; |
e065a56e | 2940 | mask = sigblockx (SIGIO); |
284f4730 | 2941 | read_avail_input (expected); |
e065a56e | 2942 | sigsetmask (mask); |
284f4730 JB |
2943 | } |
2944 | else | |
2945 | #endif | |
2946 | read_avail_input (expected); | |
2947 | #endif | |
2948 | } | |
2949 | \f | |
2950 | #ifndef VMS | |
2951 | ||
2952 | /* Read any terminal input already buffered up by the system | |
2953 | into the kbd_buffer, but do not wait. | |
2954 | ||
2955 | EXPECTED should be nonzero if the caller knows there is some input. | |
2956 | ||
2957 | Except on VMS, all input is read by this function. | |
2958 | If interrupt_input is nonzero, this function MUST be called | |
2959 | only when SIGIO is blocked. | |
2960 | ||
2961 | Returns the number of keyboard chars read, or -1 meaning | |
2962 | this is a bad time to try to read input. */ | |
2963 | ||
2964 | static int | |
2965 | read_avail_input (expected) | |
2966 | int expected; | |
2967 | { | |
2968 | struct input_event buf[KBD_BUFFER_SIZE]; | |
2969 | register int i; | |
2970 | int nread; | |
2971 | ||
2972 | if (read_socket_hook) | |
2973 | /* No need for FIONREAD or fcntl; just say don't wait. */ | |
2974 | nread = (*read_socket_hook) (0, buf, KBD_BUFFER_SIZE, expected, expected); | |
2975 | else | |
2976 | { | |
2977 | unsigned char cbuf[KBD_BUFFER_SIZE]; | |
2978 | ||
2979 | #ifdef FIONREAD | |
2980 | /* Find out how much input is available. */ | |
2981 | if (ioctl (0, FIONREAD, &nread) < 0) | |
2982 | /* Formerly simply reported no input, but that sometimes led to | |
2983 | a failure of Emacs to terminate. | |
2984 | SIGHUP seems appropriate if we can't reach the terminal. */ | |
e4535288 RS |
2985 | /* ??? Is it really right to send the signal just to this process |
2986 | rather than to the whole process group? | |
2987 | Perhaps on systems with FIONREAD Emacs is alone in its group. */ | |
284f4730 JB |
2988 | kill (getpid (), SIGHUP); |
2989 | if (nread == 0) | |
2990 | return 0; | |
2991 | if (nread > sizeof cbuf) | |
2992 | nread = sizeof cbuf; | |
2993 | #else /* no FIONREAD */ | |
2994 | #ifdef USG | |
2995 | /* Read some input if available, but don't wait. */ | |
2996 | nread = sizeof cbuf; | |
2997 | fcntl (fileno (stdin), F_SETFL, O_NDELAY); | |
2998 | #else | |
2999 | you lose; | |
3000 | #endif | |
3001 | #endif | |
3002 | ||
3003 | /* Now read; for one reason or another, this will not block. */ | |
3004 | while (1) | |
3005 | { | |
3006 | nread = read (fileno (stdin), cbuf, nread); | |
3007 | #ifdef AIX | |
3008 | /* The kernel sometimes fails to deliver SIGHUP for ptys. | |
3009 | This looks incorrect, but it isn't, because _BSD causes | |
3010 | O_NDELAY to be defined in fcntl.h as O_NONBLOCK, | |
3011 | and that causes a value other than 0 when there is no input. */ | |
3012 | if (nread == 0) | |
3013 | kill (SIGHUP, 0); | |
3014 | #endif | |
3015 | /* Retry the read if it is interrupted. */ | |
3016 | if (nread >= 0 | |
3017 | || ! (errno == EAGAIN || errno == EFAULT | |
3018 | #ifdef EBADSLT | |
3019 | || errno == EBADSLT | |
3020 | #endif | |
3021 | )) | |
3022 | break; | |
3023 | } | |
3024 | ||
3025 | #ifndef FIONREAD | |
3026 | #ifdef USG | |
3027 | fcntl (fileno (stdin), F_SETFL, 0); | |
3028 | #endif /* USG */ | |
3029 | #endif /* no FIONREAD */ | |
3030 | for (i = 0; i < nread; i++) | |
3031 | { | |
3032 | buf[i].kind = ascii_keystroke; | |
86e5706b | 3033 | buf[i].modifiers = 0; |
b04904fb | 3034 | if (meta_key == 1 && (cbuf[i] & 0x80)) |
86e5706b | 3035 | buf[i].modifiers = meta_modifier; |
b04904fb RS |
3036 | if (meta_key != 2) |
3037 | cbuf[i] &= ~0x80; | |
86e5706b | 3038 | |
7b4aedb9 JB |
3039 | XSET (buf[i].code, Lisp_Int, cbuf[i]); |
3040 | #ifdef MULTI_FRAME | |
3041 | XSET (buf[i].frame_or_window, Lisp_Frame, selected_frame); | |
3042 | #else | |
3043 | buf[i].frame_or_window = Qnil; | |
3044 | #endif | |
284f4730 JB |
3045 | } |
3046 | } | |
3047 | ||
3048 | /* Scan the chars for C-g and store them in kbd_buffer. */ | |
3049 | for (i = 0; i < nread; i++) | |
3050 | { | |
3051 | kbd_buffer_store_event (&buf[i]); | |
3052 | /* Don't look at input that follows a C-g too closely. | |
3053 | This reduces lossage due to autorepeat on C-g. */ | |
3054 | if (buf[i].kind == ascii_keystroke | |
3055 | && XINT(buf[i].code) == quit_char) | |
3056 | break; | |
3057 | } | |
3058 | ||
3059 | return nread; | |
3060 | } | |
3061 | #endif /* not VMS */ | |
3062 | \f | |
3063 | #ifdef SIGIO /* for entire page */ | |
3064 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
3065 | ||
2ce30ea2 | 3066 | SIGTYPE |
284f4730 JB |
3067 | input_available_signal (signo) |
3068 | int signo; | |
3069 | { | |
3070 | /* Must preserve main program's value of errno. */ | |
3071 | int old_errno = errno; | |
3072 | #ifdef BSD4_1 | |
3073 | extern int select_alarmed; | |
3074 | #endif | |
3075 | ||
3076 | #ifdef USG | |
3077 | /* USG systems forget handlers when they are used; | |
3078 | must reestablish each time */ | |
3079 | signal (signo, input_available_signal); | |
3080 | #endif /* USG */ | |
3081 | ||
3082 | #ifdef BSD4_1 | |
3083 | sigisheld (SIGIO); | |
3084 | #endif | |
3085 | ||
ffd56f97 JB |
3086 | if (input_available_clear_time) |
3087 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
284f4730 JB |
3088 | |
3089 | while (1) | |
3090 | { | |
3091 | int nread; | |
3092 | nread = read_avail_input (1); | |
3093 | /* -1 means it's not ok to read the input now. | |
3094 | UNBLOCK_INPUT will read it later; now, avoid infinite loop. | |
3095 | 0 means there was no keyboard input available. */ | |
3096 | if (nread <= 0) | |
3097 | break; | |
3098 | ||
3099 | #ifdef BSD4_1 | |
3100 | select_alarmed = 1; /* Force the select emulator back to life */ | |
3101 | #endif | |
3102 | } | |
3103 | ||
3104 | #ifdef BSD4_1 | |
3105 | sigfree (); | |
3106 | #endif | |
3107 | errno = old_errno; | |
3108 | } | |
3109 | #endif /* SIGIO */ | |
ad163903 JB |
3110 | |
3111 | /* Send ourselves a SIGIO. | |
3112 | ||
3113 | This function exists so that the UNBLOCK_INPUT macro in | |
3114 | blockinput.h can have some way to take care of input we put off | |
3115 | dealing with, without assuming that every file which uses | |
3116 | UNBLOCK_INPUT also has #included the files necessary to get SIGIO. */ | |
3117 | void | |
3118 | reinvoke_input_signal () | |
3119 | { | |
3120 | #ifdef SIGIO | |
3121 | kill (0, SIGIO); | |
3122 | #endif | |
3123 | } | |
3124 | ||
3125 | ||
284f4730 JB |
3126 | \f |
3127 | /* Return the prompt-string of a sparse keymap. | |
3128 | This is the first element which is a string. | |
3129 | Return nil if there is none. */ | |
3130 | ||
3131 | Lisp_Object | |
3132 | map_prompt (map) | |
3133 | Lisp_Object map; | |
3134 | { | |
3135 | while (CONSP (map)) | |
3136 | { | |
3137 | register Lisp_Object tem; | |
3138 | tem = Fcar (map); | |
3139 | if (XTYPE (tem) == Lisp_String) | |
3140 | return tem; | |
3141 | map = Fcdr (map); | |
3142 | } | |
3143 | return Qnil; | |
3144 | } | |
3145 | ||
5ec75a55 RS |
3146 | static Lisp_Object menu_bar_item (); |
3147 | static Lisp_Object menu_bar_one_keymap (); | |
3148 | ||
3149 | /* Return a list of menu items for a menu bar, appropriate | |
3150 | to the current buffer. | |
3151 | The elements have the form (KEY STRING . nil). */ | |
3152 | ||
3153 | Lisp_Object | |
3154 | menu_bar_items () | |
3155 | { | |
3156 | /* The number of keymaps we're scanning right now, and the number of | |
3157 | keymaps we have allocated space for. */ | |
3158 | int nmaps; | |
3159 | ||
3160 | /* maps[0..nmaps-1] are the prefix definitions of KEYBUF[0..t-1] | |
3161 | in the current keymaps, or nil where it is not a prefix. */ | |
3162 | Lisp_Object *maps; | |
3163 | ||
3164 | Lisp_Object def, tem; | |
3165 | ||
3166 | Lisp_Object result; | |
3167 | ||
3168 | int mapno; | |
47d319aa | 3169 | Lisp_Object oquit; |
5ec75a55 | 3170 | |
db60d856 JB |
3171 | /* In order to build the menus, we need to call the keymap |
3172 | accessors. They all call QUIT. But this function is called | |
3173 | during redisplay, during which a quit is fatal. So inhibit | |
47d319aa RS |
3174 | quitting while building the menus. |
3175 | We do this instead of specbind because (1) errors will clear it anyway | |
3176 | and (2) this avoids risk of specpdl overflow. */ | |
3177 | oquit = Vinhibit_quit; | |
3178 | Vinhibit_quit = Qt; | |
db60d856 | 3179 | |
5ec75a55 RS |
3180 | /* Build our list of keymaps. |
3181 | If we recognize a function key and replace its escape sequence in | |
3182 | keybuf with its symbol, or if the sequence starts with a mouse | |
3183 | click and we need to switch buffers, we jump back here to rebuild | |
3184 | the initial keymaps from the current buffer. */ | |
3185 | { | |
3186 | Lisp_Object *tmaps; | |
3187 | ||
3188 | nmaps = current_minor_maps (0, &tmaps) + 2; | |
3189 | maps = (Lisp_Object *) alloca (nmaps * sizeof (maps[0])); | |
3190 | bcopy (tmaps, maps, (nmaps - 2) * sizeof (maps[0])); | |
3191 | #ifdef USE_TEXT_PROPERTIES | |
3192 | maps[nmaps-2] = get_local_map (PT, current_buffer); | |
3193 | #else | |
a6d53864 | 3194 | maps[nmaps-2] = current_buffer->keymap; |
5ec75a55 | 3195 | #endif |
7e6992e0 | 3196 | maps[nmaps-1] = current_global_map; |
5ec75a55 RS |
3197 | } |
3198 | ||
3199 | /* Look up in each map the dummy prefix key `menu-bar'. */ | |
3200 | ||
3201 | result = Qnil; | |
3202 | ||
e58aa385 | 3203 | for (mapno = nmaps - 1; mapno >= 0; mapno--) |
5ec75a55 RS |
3204 | { |
3205 | if (! NILP (maps[mapno])) | |
e74fbc70 | 3206 | def = get_keyelt (access_keymap (maps[mapno], Qmenu_bar, 1, 0)); |
5ec75a55 RS |
3207 | else |
3208 | def = Qnil; | |
3209 | ||
3210 | tem = Fkeymapp (def); | |
3211 | if (!NILP (tem)) | |
3212 | result = menu_bar_one_keymap (def, result); | |
3213 | } | |
3214 | ||
a73c5e29 RS |
3215 | result = menu_bar_one_keymap (Vhelp_menu_bar_map, result); |
3216 | ||
85e28fa2 | 3217 | result = Fnreverse (result); |
47d319aa | 3218 | Vinhibit_quit = oquit; |
85e28fa2 | 3219 | return result; |
5ec75a55 RS |
3220 | } |
3221 | \f | |
3222 | /* Scan one map KEYMAP, accumulating any menu items it defines | |
3223 | that have not yet been seen in RESULT. Return the updated RESULT. */ | |
3224 | ||
3225 | static Lisp_Object | |
3226 | menu_bar_one_keymap (keymap, result) | |
3227 | Lisp_Object keymap, result; | |
3228 | { | |
3229 | Lisp_Object tail, item, key, binding, item_string, table; | |
3230 | ||
3231 | /* Loop over all keymap entries that have menu strings. */ | |
3232 | for (tail = keymap; XTYPE (tail) == Lisp_Cons; tail = XCONS (tail)->cdr) | |
3233 | { | |
3234 | item = XCONS (tail)->car; | |
3235 | if (XTYPE (item) == Lisp_Cons) | |
3236 | { | |
3237 | key = XCONS (item)->car; | |
3238 | binding = XCONS (item)->cdr; | |
3239 | if (XTYPE (binding) == Lisp_Cons) | |
3240 | { | |
3241 | item_string = XCONS (binding)->car; | |
3242 | if (XTYPE (item_string) == Lisp_String) | |
3243 | result = menu_bar_item (key, item_string, | |
3244 | Fcdr (binding), result); | |
3245 | } | |
e58aa385 RS |
3246 | else if (EQ (binding, Qundefined)) |
3247 | result = menu_bar_item (key, item_string, | |
ae450a95 | 3248 | binding, result); |
5ec75a55 RS |
3249 | } |
3250 | else if (XTYPE (item) == Lisp_Vector) | |
3251 | { | |
3252 | /* Loop over the char values represented in the vector. */ | |
3253 | int len = XVECTOR (item)->size; | |
3254 | int c; | |
3255 | for (c = 0; c < len; c++) | |
3256 | { | |
3257 | Lisp_Object character; | |
3258 | XFASTINT (character) = c; | |
3259 | binding = XVECTOR (item)->contents[c]; | |
3260 | if (XTYPE (binding) == Lisp_Cons) | |
3261 | { | |
3262 | item_string = XCONS (binding)->car; | |
3263 | if (XTYPE (item_string) == Lisp_String) | |
3264 | result = menu_bar_item (key, item_string, | |
3265 | Fcdr (binding), result); | |
3266 | } | |
e58aa385 RS |
3267 | else if (EQ (binding, Qundefined)) |
3268 | result = menu_bar_item (key, item_string, | |
ae450a95 | 3269 | binding, result); |
5ec75a55 RS |
3270 | } |
3271 | } | |
3272 | } | |
3273 | ||
3274 | return result; | |
3275 | } | |
3276 | ||
3277 | static Lisp_Object | |
3278 | menu_bar_item (key, item_string, def, result) | |
3279 | Lisp_Object key, item_string, def, result; | |
3280 | { | |
e58aa385 | 3281 | Lisp_Object tem; |
5ec75a55 RS |
3282 | Lisp_Object enabled; |
3283 | ||
e58aa385 RS |
3284 | if (EQ (def, Qundefined)) |
3285 | { | |
3286 | /* If a map has an explicit nil as definition, | |
3287 | discard any previously made menu bar item. */ | |
3288 | tem = Fassq (key, result); | |
3289 | return Fdelq (tem, result); | |
3290 | } | |
3291 | ||
5ec75a55 RS |
3292 | /* See if this entry is enabled. */ |
3293 | enabled = Qt; | |
3294 | ||
3295 | if (XTYPE (def) == Lisp_Symbol) | |
3296 | { | |
3297 | /* No property, or nil, means enable. | |
3298 | Otherwise, enable if value is not nil. */ | |
3299 | tem = Fget (def, Qmenu_enable); | |
3300 | if (!NILP (tem)) | |
3301 | enabled = Feval (tem); | |
3302 | } | |
3303 | ||
3304 | /* Add an entry for this key and string | |
3305 | if there is none yet. */ | |
e58aa385 RS |
3306 | tem = Fassq (key, result); |
3307 | if (!NILP (enabled) && NILP (tem)) | |
5ec75a55 RS |
3308 | result = Fcons (Fcons (key, Fcons (item_string, Qnil)), result); |
3309 | ||
3310 | return result; | |
3311 | } | |
3312 | \f | |
284f4730 JB |
3313 | static int echo_flag; |
3314 | static int echo_now; | |
3315 | ||
dcc408a0 RS |
3316 | /* Read a character using menus based on maps in the array MAPS. |
3317 | NMAPS is the length of MAPS. Return nil if there are no menus in the maps. | |
3318 | Return t if we displayed a menu but the user rejected it. | |
7d6de002 RS |
3319 | |
3320 | PREV_EVENT is the previous input event, or nil if we are reading | |
3321 | the first event of a key sequence. | |
3322 | ||
6569cc8d JB |
3323 | If USED_MOUSE_MENU is non-zero, then we set *USED_MOUSE_MENU to 1 |
3324 | if we used a mouse menu to read the input, or zero otherwise. If | |
3325 | USED_MOUSE_MENU is zero, *USED_MOUSE_MENU is left alone. | |
284f4730 JB |
3326 | |
3327 | The prompting is done based on the prompt-string of the map | |
3328 | and the strings associated with various map elements. */ | |
3329 | ||
7617111f | 3330 | static Lisp_Object |
7d6de002 RS |
3331 | read_char_menu_prompt (nmaps, maps, prev_event, used_mouse_menu) |
3332 | int nmaps; | |
3333 | Lisp_Object *maps; | |
3334 | Lisp_Object prev_event; | |
3335 | int *used_mouse_menu; | |
284f4730 | 3336 | { |
7d6de002 RS |
3337 | int mapno; |
3338 | register Lisp_Object name; | |
284f4730 | 3339 | int nlength; |
ff11dfa1 | 3340 | int width = FRAME_WIDTH (selected_frame) - 4; |
7d6de002 RS |
3341 | char *menu = (char *) alloca (width + 4); |
3342 | int idx = -1; | |
3343 | Lisp_Object rest, vector; | |
3344 | ||
6569cc8d JB |
3345 | if (used_mouse_menu) |
3346 | *used_mouse_menu = 0; | |
284f4730 JB |
3347 | |
3348 | /* Use local over global Menu maps */ | |
3349 | ||
7d6de002 RS |
3350 | if (! menu_prompting) |
3351 | return Qnil; | |
3352 | ||
3353 | /* Get the menu name from the first map that has one (a prompt string). */ | |
3354 | for (mapno = 0; mapno < nmaps; mapno++) | |
3355 | { | |
3356 | name = map_prompt (maps[mapno]); | |
3357 | if (!NILP (name)) | |
3358 | break; | |
3359 | } | |
284f4730 | 3360 | |
7d6de002 | 3361 | /* If we don't have any menus, just read a character normally. */ |
dbc4e1c1 | 3362 | if (mapno >= nmaps) |
7d6de002 RS |
3363 | return Qnil; |
3364 | ||
dbc4e1c1 JB |
3365 | #ifdef HAVE_X_WINDOWS |
3366 | #ifdef HAVE_X_MENU | |
7d6de002 RS |
3367 | /* If we got to this point via a mouse click, |
3368 | use a real menu for mouse selection. */ | |
dbc4e1c1 | 3369 | if (EVENT_HAS_PARAMETERS (prev_event)) |
7d6de002 RS |
3370 | { |
3371 | /* Display the menu and get the selection. */ | |
3372 | Lisp_Object *realmaps | |
3373 | = (Lisp_Object *) alloca (nmaps * sizeof (Lisp_Object)); | |
3374 | Lisp_Object value; | |
3375 | int nmaps1 = 0; | |
3376 | ||
3377 | /* Use the maps that are not nil. */ | |
3378 | for (mapno = 0; mapno < nmaps; mapno++) | |
3379 | if (!NILP (maps[mapno])) | |
3380 | realmaps[nmaps1++] = maps[mapno]; | |
3381 | ||
3382 | value = Fx_popup_menu (prev_event, Flist (nmaps1, realmaps)); | |
663258f2 JB |
3383 | if (CONSP (value)) |
3384 | { | |
3385 | /* If we got more than one event, put all but the first | |
3386 | onto this list to be read later. | |
3387 | Return just the first event now. */ | |
3388 | unread_command_events | |
3389 | = nconc2 (XCONS (value)->cdr, unread_command_events); | |
3390 | value = XCONS (value)->car; | |
3391 | } | |
7d6de002 | 3392 | if (NILP (value)) |
dcc408a0 | 3393 | value = Qt; |
6569cc8d JB |
3394 | if (used_mouse_menu) |
3395 | *used_mouse_menu = 1; | |
7d6de002 RS |
3396 | return value; |
3397 | } | |
dbc4e1c1 JB |
3398 | #endif /* HAVE_X_MENU */ |
3399 | #endif /* HAVE_X_WINDOWS */ | |
284f4730 JB |
3400 | |
3401 | /* Prompt string always starts with map's prompt, and a space. */ | |
3402 | strcpy (menu, XSTRING (name)->data); | |
3403 | nlength = XSTRING (name)->size; | |
7d6de002 | 3404 | menu[nlength++] = ':'; |
284f4730 JB |
3405 | menu[nlength++] = ' '; |
3406 | menu[nlength] = 0; | |
3407 | ||
7d6de002 RS |
3408 | /* Start prompting at start of first map. */ |
3409 | mapno = 0; | |
3410 | rest = maps[mapno]; | |
284f4730 JB |
3411 | |
3412 | /* Present the documented bindings, a line at a time. */ | |
3413 | while (1) | |
3414 | { | |
3415 | int notfirst = 0; | |
3416 | int i = nlength; | |
3417 | Lisp_Object obj; | |
3418 | int ch; | |
3419 | ||
284f4730 | 3420 | /* Loop over elements of map. */ |
7d6de002 | 3421 | while (i < width) |
284f4730 | 3422 | { |
7d6de002 | 3423 | Lisp_Object s, elt; |
284f4730 | 3424 | |
7d6de002 RS |
3425 | /* If reached end of map, start at beginning of next map. */ |
3426 | if (NILP (rest)) | |
3427 | { | |
3428 | mapno++; | |
3429 | /* At end of last map, wrap around to first map if just starting, | |
3430 | or end this line if already have something on it. */ | |
3431 | if (mapno == nmaps) | |
284f4730 | 3432 | { |
7d6de002 RS |
3433 | if (notfirst) |
3434 | break; | |
3435 | else | |
3436 | mapno = 0; | |
284f4730 | 3437 | } |
7d6de002 | 3438 | rest = maps[mapno]; |
284f4730 | 3439 | } |
7d6de002 RS |
3440 | |
3441 | /* Look at the next element of the map. */ | |
3442 | if (idx >= 0) | |
3443 | elt = XVECTOR (vector)->contents[idx]; | |
284f4730 | 3444 | else |
7d6de002 RS |
3445 | elt = Fcar_safe (rest); |
3446 | ||
3447 | if (idx < 0 && XTYPE (elt) == Lisp_Vector) | |
284f4730 | 3448 | { |
7d6de002 RS |
3449 | /* If we found a dense table in the keymap, |
3450 | advanced past it, but start scanning its contents. */ | |
3451 | rest = Fcdr_safe (rest); | |
3452 | vector = elt; | |
3453 | idx = 0; | |
284f4730 | 3454 | } |
7d6de002 RS |
3455 | else |
3456 | { | |
3457 | /* An ordinary element. */ | |
3458 | s = Fcar_safe (Fcdr_safe (elt)); | |
3459 | if (XTYPE (s) != Lisp_String) | |
3460 | /* Ignore the element if it has no prompt string. */ | |
3461 | ; | |
3462 | /* If we have room for the prompt string, add it to this line. | |
3463 | If this is the first on the line, always add it. */ | |
3464 | else if (XSTRING (s)->size + i < width | |
3465 | || !notfirst) | |
3466 | { | |
3467 | int thiswidth; | |
284f4730 | 3468 | |
7d6de002 RS |
3469 | /* Punctuate between strings. */ |
3470 | if (notfirst) | |
3471 | { | |
3472 | strcpy (menu + i, ", "); | |
3473 | i += 2; | |
3474 | } | |
3475 | notfirst = 1; | |
3476 | ||
3477 | /* Add as much of string as fits. */ | |
3478 | thiswidth = XSTRING (s)->size; | |
3479 | if (thiswidth + i > width) | |
3480 | thiswidth = width - i; | |
3481 | bcopy (XSTRING (s)->data, menu + i, thiswidth); | |
3482 | i += thiswidth; | |
3483 | } | |
3484 | else | |
3485 | { | |
3486 | /* If this element does not fit, end the line now, | |
3487 | and save the element for the next line. */ | |
3488 | strcpy (menu + i, "..."); | |
3489 | break; | |
3490 | } | |
3491 | ||
3492 | /* Move past this element. */ | |
3493 | if (idx >= 0 && idx + 1 >= XVECTOR (rest)->size) | |
3494 | /* Handle reaching end of dense table. */ | |
3495 | idx = -1; | |
3496 | if (idx >= 0) | |
3497 | idx++; | |
3498 | else | |
3499 | rest = Fcdr_safe (rest); | |
3500 | } | |
284f4730 JB |
3501 | } |
3502 | ||
3503 | /* Prompt with that and read response. */ | |
3504 | message1 (menu); | |
7d6de002 | 3505 | obj = read_char (1, 0, 0, Qnil, 0); |
284f4730 JB |
3506 | |
3507 | if (XTYPE (obj) != Lisp_Int) | |
3508 | return obj; | |
3509 | else | |
3510 | ch = XINT (obj); | |
3511 | ||
f4255cd1 | 3512 | if (! EQ (obj, menu_prompt_more_char) |
284f4730 | 3513 | && (XTYPE (menu_prompt_more_char) != Lisp_Int |
f4255cd1 | 3514 | || ! EQ (obj, make_number (Ctl (XINT (menu_prompt_more_char)))))) |
284f4730 JB |
3515 | return obj; |
3516 | } | |
3517 | } | |
284f4730 JB |
3518 | \f |
3519 | /* Reading key sequences. */ | |
3520 | ||
3521 | /* Follow KEY in the maps in CURRENT[0..NMAPS-1], placing its bindings | |
3522 | in DEFS[0..NMAPS-1]. Set NEXT[i] to DEFS[i] if DEFS[i] is a | |
3523 | keymap, or nil otherwise. Return the index of the first keymap in | |
3524 | which KEY has any binding, or NMAPS if no map has a binding. | |
3525 | ||
3526 | If KEY is a meta ASCII character, treat it like meta-prefix-char | |
3527 | followed by the corresponding non-meta character. Keymaps in | |
3528 | CURRENT with non-prefix bindings for meta-prefix-char become nil in | |
3529 | NEXT. | |
3530 | ||
3531 | When KEY is not defined in any of the keymaps, if it is an upper | |
3532 | case letter and there are bindings for the corresponding lower-case | |
3533 | letter, return the bindings for the lower-case letter. | |
3534 | ||
88cb0656 JB |
3535 | If KEY has no bindings in any of the CURRENT maps, NEXT is left |
3536 | unmodified. | |
3537 | ||
284f4730 JB |
3538 | NEXT may == CURRENT. */ |
3539 | ||
3540 | static int | |
3541 | follow_key (key, nmaps, current, defs, next) | |
3542 | Lisp_Object key; | |
3543 | Lisp_Object *current, *defs, *next; | |
3544 | int nmaps; | |
3545 | { | |
3546 | int i, first_binding; | |
3547 | ||
3548 | /* If KEY is a meta ASCII character, treat it like meta-prefix-char | |
3549 | followed by the corresponding non-meta character. */ | |
86e5706b | 3550 | if (XTYPE (key) == Lisp_Int && (XINT (key) & CHAR_META)) |
284f4730 JB |
3551 | { |
3552 | for (i = 0; i < nmaps; i++) | |
3553 | if (! NILP (current[i])) | |
3554 | { | |
cd21b839 | 3555 | next[i] = |
e74fbc70 | 3556 | get_keyelt (access_keymap (current[i], meta_prefix_char, 1, 0)); |
284f4730 JB |
3557 | |
3558 | /* Note that since we pass the resulting bindings through | |
3559 | get_keymap_1, non-prefix bindings for meta-prefix-char | |
3560 | disappear. */ | |
f4255cd1 | 3561 | next[i] = get_keymap_1 (next[i], 0, 1); |
284f4730 JB |
3562 | } |
3563 | else | |
3564 | next[i] = Qnil; | |
3565 | ||
3566 | current = next; | |
86e5706b | 3567 | XSET (key, Lisp_Int, XFASTINT (key) & ~CHAR_META); |
284f4730 JB |
3568 | } |
3569 | ||
3570 | first_binding = nmaps; | |
3571 | for (i = nmaps - 1; i >= 0; i--) | |
3572 | { | |
3573 | if (! NILP (current[i])) | |
3574 | { | |
e74fbc70 | 3575 | defs[i] = get_keyelt (access_keymap (current[i], key, 1, 0)); |
284f4730 JB |
3576 | if (! NILP (defs[i])) |
3577 | first_binding = i; | |
3578 | } | |
3579 | else | |
3580 | defs[i] = Qnil; | |
3581 | } | |
3582 | ||
3583 | /* When KEY is not defined in any of the keymaps, if it is an upper | |
3584 | case letter and there are bindings for the corresponding | |
3585 | lower-case letter, return the bindings for the lower-case letter. */ | |
3586 | if (first_binding == nmaps | |
3587 | && XTYPE (key) == Lisp_Int | |
bb1ef421 RS |
3588 | && ((((XINT (key) & 0x3ffff) |
3589 | < XSTRING (current_buffer->downcase_table)->size) | |
3590 | && UPPERCASEP (XINT (key) & 0x3ffff)) | |
86e5706b | 3591 | || (XINT (key) & shift_modifier))) |
284f4730 | 3592 | { |
86e5706b RS |
3593 | if (XINT (key) & shift_modifier) |
3594 | XSETINT (key, XINT (key) & ~shift_modifier); | |
3595 | else | |
3596 | XSETINT (key, DOWNCASE (XINT (key))); | |
284f4730 JB |
3597 | |
3598 | first_binding = nmaps; | |
3599 | for (i = nmaps - 1; i >= 0; i--) | |
3600 | { | |
3601 | if (! NILP (current[i])) | |
3602 | { | |
e74fbc70 | 3603 | defs[i] = get_keyelt (access_keymap (current[i], key, 1, 0)); |
284f4730 JB |
3604 | if (! NILP (defs[i])) |
3605 | first_binding = i; | |
3606 | } | |
3607 | else | |
3608 | defs[i] = Qnil; | |
3609 | } | |
3610 | } | |
86e5706b | 3611 | |
284f4730 | 3612 | /* Given the set of bindings we've found, produce the next set of maps. */ |
0a7f1fc0 JB |
3613 | if (first_binding < nmaps) |
3614 | for (i = 0; i < nmaps; i++) | |
f4255cd1 | 3615 | next[i] = NILP (defs[i]) ? Qnil : get_keymap_1 (defs[i], 0, 1); |
284f4730 JB |
3616 | |
3617 | return first_binding; | |
3618 | } | |
3619 | ||
f4255cd1 JB |
3620 | /* Read a sequence of keys that ends with a non prefix character, |
3621 | storing it in KEYBUF, a buffer of size BUFSIZE. | |
3622 | Prompt with PROMPT. | |
284f4730 | 3623 | Return the length of the key sequence stored. |
dcc408a0 | 3624 | Return -1 if the user rejected a command menu. |
284f4730 | 3625 | |
f4255cd1 JB |
3626 | Echo starting immediately unless `prompt' is 0. |
3627 | ||
3628 | Where a key sequence ends depends on the currently active keymaps. | |
3629 | These include any minor mode keymaps active in the current buffer, | |
3630 | the current buffer's local map, and the global map. | |
3631 | ||
3632 | If a key sequence has no other bindings, we check Vfunction_key_map | |
3633 | to see if some trailing subsequence might be the beginning of a | |
3634 | function key's sequence. If so, we try to read the whole function | |
3635 | key, and substitute its symbolic name into the key sequence. | |
3636 | ||
fbcd35bd JB |
3637 | We ignore unbound `down-' mouse clicks. We turn unbound `drag-' and |
3638 | `double-' events into similar click events, if that would make them | |
3639 | bound. We try to turn `triple-' events first into `double-' events, | |
3640 | then into clicks. | |
f4255cd1 JB |
3641 | |
3642 | If we get a mouse click in a mode line, vertical divider, or other | |
3643 | non-text area, we treat the click as if it were prefixed by the | |
3644 | symbol denoting that area - `mode-line', `vertical-line', or | |
3645 | whatever. | |
3646 | ||
3647 | If the sequence starts with a mouse click, we read the key sequence | |
3648 | with respect to the buffer clicked on, not the current buffer. | |
284f4730 | 3649 | |
f4255cd1 JB |
3650 | If the user switches frames in the midst of a key sequence, we put |
3651 | off the switch-frame event until later; the next call to | |
3652 | read_char will return it. */ | |
48e416d4 | 3653 | |
284f4730 JB |
3654 | static int |
3655 | read_key_sequence (keybuf, bufsize, prompt) | |
3656 | Lisp_Object *keybuf; | |
3657 | int bufsize; | |
f4255cd1 | 3658 | char *prompt; |
284f4730 | 3659 | { |
f4255cd1 JB |
3660 | int count = specpdl_ptr - specpdl; |
3661 | ||
284f4730 JB |
3662 | /* How many keys there are in the current key sequence. */ |
3663 | int t; | |
3664 | ||
284f4730 JB |
3665 | /* The length of the echo buffer when we started reading, and |
3666 | the length of this_command_keys when we started reading. */ | |
3667 | int echo_start; | |
f4255cd1 | 3668 | int keys_start; |
284f4730 JB |
3669 | |
3670 | /* The number of keymaps we're scanning right now, and the number of | |
3671 | keymaps we have allocated space for. */ | |
3672 | int nmaps; | |
3673 | int nmaps_allocated = 0; | |
3674 | ||
284f4730 JB |
3675 | /* defs[0..nmaps-1] are the definitions of KEYBUF[0..t-1] in |
3676 | the current keymaps. */ | |
3677 | Lisp_Object *defs; | |
3678 | ||
f4255cd1 JB |
3679 | /* submaps[0..nmaps-1] are the prefix definitions of KEYBUF[0..t-1] |
3680 | in the current keymaps, or nil where it is not a prefix. */ | |
3681 | Lisp_Object *submaps; | |
3682 | ||
3683 | /* The index in defs[] of the first keymap that has a binding for | |
3684 | this key sequence. In other words, the lowest i such that | |
3685 | defs[i] is non-nil. */ | |
284f4730 JB |
3686 | int first_binding; |
3687 | ||
f4255cd1 | 3688 | /* If t < mock_input, then KEYBUF[t] should be read as the next |
253598e4 JB |
3689 | input key. |
3690 | ||
3691 | We use this to recover after recognizing a function key. Once we | |
3692 | realize that a suffix of the current key sequence is actually a | |
3693 | function key's escape sequence, we replace the suffix with the | |
3694 | function key's binding from Vfunction_key_map. Now keybuf | |
f4255cd1 JB |
3695 | contains a new and different key sequence, so the echo area, |
3696 | this_command_keys, and the submaps and defs arrays are wrong. In | |
3697 | this situation, we set mock_input to t, set t to 0, and jump to | |
3698 | restart_sequence; the loop will read keys from keybuf up until | |
3699 | mock_input, thus rebuilding the state; and then it will resume | |
3700 | reading characters from the keyboard. */ | |
284f4730 JB |
3701 | int mock_input = 0; |
3702 | ||
253598e4 | 3703 | /* If the sequence is unbound in submaps[], then |
f4255cd1 JB |
3704 | keybuf[fkey_start..fkey_end-1] is a prefix in Vfunction_key_map, |
3705 | and fkey_map is its binding. | |
253598e4 | 3706 | |
f4255cd1 JB |
3707 | These might be > t, indicating that all function key scanning |
3708 | should hold off until t reaches them. We do this when we've just | |
3709 | recognized a function key, to avoid searching for the function | |
3710 | key's again in Vfunction_key_map. */ | |
284f4730 | 3711 | int fkey_start = 0, fkey_end = 0; |
4efda7dd | 3712 | Lisp_Object fkey_map; |
284f4730 | 3713 | |
cd21b839 JB |
3714 | /* If we receive a ``switch-frame'' event in the middle of a key sequence, |
3715 | we put it off for later. While we're reading, we keep the event here. */ | |
4efda7dd | 3716 | Lisp_Object delayed_switch_frame; |
cd21b839 | 3717 | |
4efda7dd RS |
3718 | Lisp_Object first_event; |
3719 | ||
3720 | int junk; | |
3721 | ||
3722 | last_nonmenu_event = Qnil; | |
3723 | ||
3724 | delayed_switch_frame = Qnil; | |
3725 | fkey_map = Vfunction_key_map; | |
f4255cd1 JB |
3726 | |
3727 | /* If there is no function key map, turn off function key scanning. */ | |
3728 | if (NILP (Fkeymapp (Vfunction_key_map))) | |
3729 | fkey_start = fkey_end = bufsize + 1; | |
3730 | ||
284f4730 JB |
3731 | if (INTERACTIVE) |
3732 | { | |
3733 | if (prompt) | |
3734 | echo_prompt (prompt); | |
3735 | else if (cursor_in_echo_area) | |
3736 | /* This doesn't put in a dash if the echo buffer is empty, so | |
3737 | you don't always see a dash hanging out in the minibuffer. */ | |
3738 | echo_dash (); | |
284f4730 JB |
3739 | } |
3740 | ||
f4255cd1 JB |
3741 | /* Record the initial state of the echo area and this_command_keys; |
3742 | we will need to restore them if we replay a key sequence. */ | |
0a7f1fc0 | 3743 | if (INTERACTIVE) |
f4255cd1 JB |
3744 | echo_start = echo_length (); |
3745 | keys_start = this_command_key_count; | |
0a7f1fc0 | 3746 | |
a6d53864 RS |
3747 | #if 0 /* This doesn't quite work, because some of the things |
3748 | that read_char does cannot safely be bypassed. | |
3749 | It seems too risky to try to make this work right. */ | |
4efda7dd RS |
3750 | /* Read the first char of the sequence specially, before setting |
3751 | up any keymaps, in case a filter runs and switches buffers on us. */ | |
3752 | first_event = read_char (!prompt, 0, submaps, last_nonmenu_event, | |
3753 | &junk); | |
a6d53864 | 3754 | #endif |
4efda7dd | 3755 | |
7b4aedb9 JB |
3756 | /* We jump here when the key sequence has been thoroughly changed, and |
3757 | we need to rescan it starting from the beginning. When we jump here, | |
3758 | keybuf[0..mock_input] holds the sequence we should reread. */ | |
07d2b8de | 3759 | replay_sequence: |
7b4aedb9 | 3760 | |
f4255cd1 | 3761 | /* Build our list of keymaps. |
07d2b8de JB |
3762 | If we recognize a function key and replace its escape sequence in |
3763 | keybuf with its symbol, or if the sequence starts with a mouse | |
3764 | click and we need to switch buffers, we jump back here to rebuild | |
3765 | the initial keymaps from the current buffer. */ | |
284f4730 JB |
3766 | { |
3767 | Lisp_Object *maps; | |
3768 | ||
3769 | nmaps = current_minor_maps (0, &maps) + 2; | |
3770 | if (nmaps > nmaps_allocated) | |
3771 | { | |
253598e4 | 3772 | submaps = (Lisp_Object *) alloca (nmaps * sizeof (submaps[0])); |
284f4730 JB |
3773 | defs = (Lisp_Object *) alloca (nmaps * sizeof (defs[0])); |
3774 | nmaps_allocated = nmaps; | |
3775 | } | |
253598e4 | 3776 | bcopy (maps, submaps, (nmaps - 2) * sizeof (submaps[0])); |
497ba7a1 RS |
3777 | #ifdef USE_TEXT_PROPERTIES |
3778 | submaps[nmaps-2] = get_local_map (PT, current_buffer); | |
3779 | #else | |
a6d53864 | 3780 | submaps[nmaps-2] = current_buffer->keymap; |
497ba7a1 | 3781 | #endif |
7e6992e0 | 3782 | submaps[nmaps-1] = current_global_map; |
284f4730 JB |
3783 | } |
3784 | ||
3785 | /* Find an accurate initial value for first_binding. */ | |
3786 | for (first_binding = 0; first_binding < nmaps; first_binding++) | |
253598e4 | 3787 | if (! NILP (submaps[first_binding])) |
284f4730 JB |
3788 | break; |
3789 | ||
f4255cd1 JB |
3790 | /* We jump here when a function key substitution has forced us to |
3791 | reprocess the current key sequence. keybuf[0..mock_input] is the | |
3792 | sequence we want to reread. */ | |
3793 | t = 0; | |
3794 | ||
3795 | /* These are no-ops the first time through, but if we restart, they | |
3796 | revert the echo area and this_command_keys to their original state. */ | |
3797 | this_command_key_count = keys_start; | |
3798 | if (INTERACTIVE) | |
3799 | echo_truncate (echo_start); | |
3800 | ||
cca310da JB |
3801 | /* If the best binding for the current key sequence is a keymap, or |
3802 | we may be looking at a function key's escape sequence, keep on | |
3803 | reading. */ | |
253598e4 | 3804 | while ((first_binding < nmaps && ! NILP (submaps[first_binding])) |
cca310da JB |
3805 | || (first_binding >= nmaps |
3806 | && fkey_start < t | |
3807 | /* mock input is never part of a function key's sequence. */ | |
3808 | && mock_input <= fkey_start)) | |
284f4730 JB |
3809 | { |
3810 | Lisp_Object key; | |
7d6de002 | 3811 | int used_mouse_menu = 0; |
284f4730 | 3812 | |
7b4aedb9 JB |
3813 | /* Where the last real key started. If we need to throw away a |
3814 | key that has expanded into more than one element of keybuf | |
3815 | (say, a mouse click on the mode line which is being treated | |
3816 | as [mode-line (mouse-...)], then we backtrack to this point | |
3817 | of keybuf. */ | |
3818 | int last_real_key_start; | |
3819 | ||
0a7f1fc0 JB |
3820 | /* These variables are analogous to echo_start and keys_start; |
3821 | while those allow us to restart the entire key sequence, | |
3822 | echo_local_start and keys_local_start allow us to throw away | |
3823 | just one key. */ | |
f4255cd1 JB |
3824 | int echo_local_start, keys_local_start, local_first_binding; |
3825 | ||
284f4730 JB |
3826 | if (t >= bufsize) |
3827 | error ("key sequence too long"); | |
3828 | ||
f4255cd1 JB |
3829 | if (INTERACTIVE) |
3830 | echo_local_start = echo_length (); | |
3831 | keys_local_start = this_command_key_count; | |
3832 | local_first_binding = first_binding; | |
3833 | ||
3834 | replay_key: | |
0a7f1fc0 | 3835 | /* These are no-ops, unless we throw away a keystroke below and |
f4255cd1 JB |
3836 | jumped back up to replay_key; in that case, these restore the |
3837 | variables to their original state, allowing us to replay the | |
0a7f1fc0 | 3838 | loop. */ |
f4255cd1 JB |
3839 | if (INTERACTIVE) |
3840 | echo_truncate (echo_local_start); | |
0a7f1fc0 JB |
3841 | this_command_key_count = keys_local_start; |
3842 | first_binding = local_first_binding; | |
3843 | ||
7e85b935 RS |
3844 | /* By default, assume each event is "real". */ |
3845 | last_real_key_start = t; | |
3846 | ||
f4255cd1 | 3847 | /* Does mock_input indicate that we are re-reading a key sequence? */ |
284f4730 JB |
3848 | if (t < mock_input) |
3849 | { | |
3850 | key = keybuf[t]; | |
3851 | add_command_key (key); | |
3852 | echo_char (key); | |
3853 | } | |
253598e4 JB |
3854 | |
3855 | /* If not, we should actually read a character. */ | |
284f4730 JB |
3856 | else |
3857 | { | |
a6d53864 RS |
3858 | struct buffer *buf = current_buffer; |
3859 | ||
a6d53864 RS |
3860 | key = read_char (!prompt, nmaps, submaps, last_nonmenu_event, |
3861 | &used_mouse_menu); | |
284f4730 | 3862 | |
dcc408a0 RS |
3863 | /* read_char returns t when it shows a menu and the user rejects it. |
3864 | Just return -1. */ | |
3865 | if (EQ (key, Qt)) | |
3866 | return -1; | |
3867 | ||
f4255cd1 | 3868 | /* read_char returns -1 at the end of a macro. |
284f4730 JB |
3869 | Emacs 18 handles this by returning immediately with a |
3870 | zero, so that's what we'll do. */ | |
86e5706b | 3871 | if (XTYPE (key) == Lisp_Int && XINT (key) == -1) |
cd21b839 | 3872 | { |
f4255cd1 JB |
3873 | t = 0; |
3874 | goto done; | |
cd21b839 | 3875 | } |
284f4730 JB |
3876 | |
3877 | Vquit_flag = Qnil; | |
7e85b935 | 3878 | } |
284f4730 | 3879 | |
7e85b935 RS |
3880 | /* Clicks in non-text areas get prefixed by the symbol |
3881 | in their CHAR-ADDRESS field. For example, a click on | |
3882 | the mode line is prefixed by the symbol `mode-line'. | |
3883 | ||
3884 | Furthermore, key sequences beginning with mouse clicks | |
3885 | are read using the keymaps of the buffer clicked on, not | |
3886 | the current buffer. So we may have to switch the buffer | |
3887 | here. | |
3888 | ||
3889 | When we turn one event into two events, we must make sure | |
3890 | that neither of the two looks like the original--so that, | |
3891 | if we replay the events, they won't be expanded again. | |
3892 | If not for this, such reexpansion could happen either here | |
3893 | or when user programs play with this-command-keys. */ | |
3894 | if (EVENT_HAS_PARAMETERS (key)) | |
3895 | { | |
3896 | Lisp_Object kind = EVENT_HEAD_KIND (EVENT_HEAD (key)); | |
cca310da | 3897 | |
7e85b935 | 3898 | if (EQ (kind, Qmouse_click)) |
0a7f1fc0 | 3899 | { |
7e85b935 RS |
3900 | Lisp_Object window = POSN_WINDOW (EVENT_START (key)); |
3901 | Lisp_Object posn = POSN_BUFFER_POSN (EVENT_START (key)); | |
f4255cd1 | 3902 | |
7e85b935 | 3903 | if (XTYPE (posn) == Lisp_Cons) |
0a7f1fc0 | 3904 | { |
7e85b935 RS |
3905 | /* We're looking at the second event of a |
3906 | sequence which we expanded before. Set | |
3907 | last_real_key_start appropriately. */ | |
3908 | if (t > 0) | |
3909 | last_real_key_start = t - 1; | |
cd21b839 | 3910 | } |
7e85b935 RS |
3911 | |
3912 | /* Key sequences beginning with mouse clicks are | |
3913 | read using the keymaps in the buffer clicked on, | |
3914 | not the current buffer. If we're at the | |
3915 | beginning of a key sequence, switch buffers. */ | |
3916 | if (last_real_key_start == 0 | |
3917 | && XTYPE (window) == Lisp_Window | |
3918 | && XTYPE (XWINDOW (window)->buffer) == Lisp_Buffer | |
3919 | && XBUFFER (XWINDOW (window)->buffer) != current_buffer) | |
cd21b839 | 3920 | { |
7e85b935 RS |
3921 | keybuf[t] = key; |
3922 | mock_input = t + 1; | |
3923 | ||
3924 | /* Arrange to go back to the original buffer once we're | |
3925 | done reading the key sequence. Note that we can't | |
3926 | use save_excursion_{save,restore} here, because they | |
3927 | save point as well as the current buffer; we don't | |
3928 | want to save point, because redisplay may change it, | |
3929 | to accommodate a Fset_window_start or something. We | |
3930 | don't want to do this at the top of the function, | |
3931 | because we may get input from a subprocess which | |
3932 | wants to change the selected window and stuff (say, | |
3933 | emacsclient). */ | |
3934 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
3935 | ||
3936 | set_buffer_internal (XBUFFER (XWINDOW (window)->buffer)); | |
3937 | goto replay_sequence; | |
0a7f1fc0 | 3938 | } |
7e85b935 | 3939 | else if (XTYPE (posn) == Lisp_Symbol) |
5ec75a55 | 3940 | { |
7e85b935 RS |
3941 | /* Expand mode-line and scroll-bar events into two events: |
3942 | use posn as a fake prefix key. */ | |
5ec75a55 | 3943 | |
7e85b935 RS |
3944 | if (t + 1 >= bufsize) |
3945 | error ("key sequence too long"); | |
3946 | keybuf[t] = posn; | |
3947 | keybuf[t+1] = key; | |
3948 | mock_input = t + 2; | |
3949 | ||
3950 | /* Zap the position in key, so we know that we've | |
3951 | expanded it, and don't try to do so again. */ | |
3952 | POSN_BUFFER_POSN (EVENT_START (key)) | |
3953 | = Fcons (posn, Qnil); | |
3954 | goto replay_key; | |
5ec75a55 | 3955 | } |
0a7f1fc0 | 3956 | } |
7e85b935 | 3957 | else if (EQ (kind, Qswitch_frame)) |
a6d53864 | 3958 | { |
7e85b935 RS |
3959 | /* If we're at the beginning of a key sequence, go |
3960 | ahead and return this event. If we're in the | |
3961 | midst of a key sequence, delay it until the end. */ | |
3962 | if (t > 0) | |
3963 | { | |
3964 | delayed_switch_frame = key; | |
3965 | goto replay_key; | |
3966 | } | |
3967 | } | |
3968 | else | |
3969 | { | |
3970 | Lisp_Object posn = POSN_BUFFER_POSN (EVENT_START (key)); | |
3971 | ||
3972 | /* Handle menu-bar events: | |
3973 | insert the dummy prefix event `menu-bar'. */ | |
3974 | if (EQ (posn, Qmenu_bar)) | |
3975 | { | |
3976 | if (t + 1 >= bufsize) | |
3977 | error ("key sequence too long"); | |
3978 | /* Run the Lucid hook. */ | |
3979 | call1 (Vrun_hooks, Qactivate_menubar_hook); | |
3980 | /* If it has changed current-menubar from previous value, | |
3981 | really recompute the menubar from the value. */ | |
3982 | if (! NILP (Vlucid_menu_bar_dirty_flag)) | |
3983 | call0 (Qrecompute_lucid_menubar); | |
3984 | keybuf[t] = posn; | |
3985 | keybuf[t+1] = key; | |
3986 | ||
3987 | /* Zap the position in key, so we know that we've | |
3988 | expanded it, and don't try to do so again. */ | |
3989 | POSN_BUFFER_POSN (EVENT_START (key)) | |
3990 | = Fcons (posn, Qnil); | |
3991 | ||
3992 | mock_input = t + 2; | |
3993 | goto replay_sequence; | |
3994 | } | |
3995 | else if (XTYPE (posn) == Lisp_Cons) | |
3996 | { | |
3997 | /* We're looking at the second event of a | |
3998 | sequence which we expanded before. Set | |
3999 | last_real_key_start appropriately. */ | |
4000 | if (last_real_key_start == t && t > 0) | |
4001 | last_real_key_start = t - 1; | |
4002 | } | |
a6d53864 | 4003 | } |
284f4730 | 4004 | } |
f4255cd1 JB |
4005 | |
4006 | /* We have finally decided that KEY is something we might want | |
4007 | to look up. */ | |
284f4730 JB |
4008 | first_binding = (follow_key (key, |
4009 | nmaps - first_binding, | |
253598e4 | 4010 | submaps + first_binding, |
284f4730 | 4011 | defs + first_binding, |
253598e4 | 4012 | submaps + first_binding) |
284f4730 | 4013 | + first_binding); |
0a7f1fc0 | 4014 | |
f4255cd1 | 4015 | /* If KEY wasn't bound, we'll try some fallbacks. */ |
0a7f1fc0 JB |
4016 | if (first_binding >= nmaps) |
4017 | { | |
4018 | Lisp_Object head = EVENT_HEAD (key); | |
4019 | ||
7e85b935 RS |
4020 | if (EQ (head, Vhelp_char)) |
4021 | { | |
4022 | read_key_sequence_cmd = Vprefix_help_command; | |
4023 | keybuf[t++] = key; | |
4024 | last_nonmenu_event = key; | |
4025 | goto done; | |
4026 | } | |
4027 | ||
0a7f1fc0 JB |
4028 | if (XTYPE (head) == Lisp_Symbol) |
4029 | { | |
4030 | Lisp_Object breakdown = parse_modifiers (head); | |
80645119 | 4031 | int modifiers = XINT (XCONS (XCONS (breakdown)->cdr)->car); |
0a7f1fc0 JB |
4032 | |
4033 | /* We drop unbound `down-' events altogether. */ | |
4034 | if (modifiers & down_modifier) | |
4035 | { | |
7b4aedb9 JB |
4036 | /* Dispose of this event by simply jumping back to |
4037 | replay_key, to get another event. | |
4038 | ||
4039 | Note that if this event came from mock input, | |
4040 | then just jumping back to replay_key will just | |
4041 | hand it to us again. So we have to wipe out any | |
4042 | mock input. | |
4043 | ||
4044 | We could delete keybuf[t] and shift everything | |
4045 | after that to the left by one spot, but we'd also | |
4046 | have to fix up any variable that points into | |
4047 | keybuf, and shifting isn't really necessary | |
4048 | anyway. | |
4049 | ||
4050 | Adding prefixes for non-textual mouse clicks | |
4051 | creates two characters of mock input, and both | |
4052 | must be thrown away. If we're only looking at | |
4053 | the prefix now, we can just jump back to | |
4054 | replay_key. On the other hand, if we've already | |
4055 | processed the prefix, and now the actual click | |
4056 | itself is giving us trouble, then we've lost the | |
4057 | state of the keymaps we want to backtrack to, and | |
4058 | we need to replay the whole sequence to rebuild | |
4059 | it. | |
4060 | ||
f4255cd1 JB |
4061 | Beyond that, only function key expansion could |
4062 | create more than two keys, but that should never | |
4063 | generate mouse events, so it's okay to zero | |
4064 | mock_input in that case too. | |
7b4aedb9 | 4065 | |
0a7f1fc0 | 4066 | Isn't this just the most wonderful code ever? */ |
7b4aedb9 JB |
4067 | if (t == last_real_key_start) |
4068 | { | |
4069 | mock_input = 0; | |
4070 | goto replay_key; | |
4071 | } | |
4072 | else | |
4073 | { | |
4074 | mock_input = last_real_key_start; | |
4075 | goto replay_sequence; | |
4076 | } | |
0a7f1fc0 JB |
4077 | } |
4078 | ||
4079 | /* We turn unbound `drag-' events into `click-' | |
4080 | events, if the click would be bound. */ | |
fbcd35bd JB |
4081 | else if (modifiers & (drag_modifier | double_modifier |
4082 | | triple_modifier)) | |
0a7f1fc0 | 4083 | { |
fbcd35bd JB |
4084 | while (modifiers & (drag_modifier | double_modifier |
4085 | | triple_modifier)) | |
4086 | { | |
4087 | Lisp_Object new_head, new_click; | |
4088 | if (modifiers & triple_modifier) | |
4089 | modifiers ^= (double_modifier | triple_modifier); | |
4090 | else | |
4091 | modifiers &= ~(drag_modifier | double_modifier); | |
4092 | new_head = | |
4093 | apply_modifiers (modifiers, XCONS (breakdown)->car); | |
4094 | new_click = | |
4095 | Fcons (new_head, Fcons (EVENT_START (key), Qnil)); | |
4096 | ||
4097 | /* Look for a binding for this new key. follow_key | |
4098 | promises that it didn't munge submaps the | |
4099 | last time we called it, since key was unbound. */ | |
4100 | first_binding = | |
4101 | (follow_key (new_click, | |
4102 | nmaps - local_first_binding, | |
4103 | submaps + local_first_binding, | |
4104 | defs + local_first_binding, | |
4105 | submaps + local_first_binding) | |
4106 | + local_first_binding); | |
4107 | ||
4108 | /* If that click is bound, go for it. */ | |
4109 | if (first_binding < nmaps) | |
4110 | { | |
4111 | key = new_click; | |
4112 | break; | |
4113 | } | |
4114 | /* Otherwise, we'll leave key set to the drag event. */ | |
4115 | } | |
0a7f1fc0 JB |
4116 | } |
4117 | } | |
4118 | } | |
4119 | ||
284f4730 | 4120 | keybuf[t++] = key; |
7d6de002 RS |
4121 | /* Normally, last_nonmenu_event gets the previous key we read. |
4122 | But when a mouse popup menu is being used, | |
4123 | we don't update last_nonmenu_event; it continues to hold the mouse | |
4124 | event that preceded the first level of menu. */ | |
4125 | if (!used_mouse_menu) | |
4126 | last_nonmenu_event = key; | |
284f4730 JB |
4127 | |
4128 | /* If the sequence is unbound, see if we can hang a function key | |
253598e4 JB |
4129 | off the end of it. We only want to scan real keyboard input |
4130 | for function key sequences, so if mock_input says that we're | |
f4255cd1 | 4131 | re-reading old events, don't examine it. */ |
284f4730 | 4132 | if (first_binding >= nmaps |
253598e4 | 4133 | && t >= mock_input) |
284f4730 JB |
4134 | { |
4135 | Lisp_Object fkey_next; | |
4136 | ||
4137 | /* Scan from fkey_end until we find a bound suffix. */ | |
4138 | while (fkey_end < t) | |
4139 | { | |
f4255cd1 JB |
4140 | Lisp_Object key; |
4141 | ||
4142 | key = keybuf[fkey_end++]; | |
067ffa38 JB |
4143 | /* Look up meta-characters by prefixing them |
4144 | with meta_prefix_char. I hate this. */ | |
d3cc13fa | 4145 | if (XTYPE (key) == Lisp_Int && XINT (key) & meta_modifier) |
f4255cd1 | 4146 | { |
e74fbc70 RS |
4147 | fkey_next |
4148 | = get_keymap_1 | |
f4255cd1 | 4149 | (get_keyelt |
e74fbc70 | 4150 | (access_keymap (fkey_map, meta_prefix_char, 1, 0)), |
f4255cd1 | 4151 | 0, 1); |
d3cc13fa | 4152 | XFASTINT (key) = XFASTINT (key) & ~meta_modifier; |
f4255cd1 | 4153 | } |
067ffa38 JB |
4154 | else |
4155 | fkey_next = fkey_map; | |
4156 | ||
e74fbc70 RS |
4157 | fkey_next |
4158 | = get_keyelt (access_keymap (fkey_next, key, 1, 0)); | |
067ffa38 | 4159 | |
85bc5181 | 4160 | /* If keybuf[fkey_start..fkey_end] is bound in the |
a764a753 | 4161 | function key map and it's a suffix of the current |
85bc5181 | 4162 | sequence (i.e. fkey_end == t), replace it with |
a764a753 | 4163 | the binding and restart with fkey_start at the end. */ |
284f4730 JB |
4164 | if (XTYPE (fkey_next) == Lisp_Vector |
4165 | && fkey_end == t) | |
4166 | { | |
4167 | t = fkey_start + XVECTOR (fkey_next)->size; | |
4168 | if (t >= bufsize) | |
4169 | error ("key sequence too long"); | |
4170 | ||
4171 | bcopy (XVECTOR (fkey_next)->contents, | |
4172 | keybuf + fkey_start, | |
4173 | (t - fkey_start) * sizeof (keybuf[0])); | |
4174 | ||
4175 | mock_input = t; | |
4176 | fkey_start = fkey_end = t; | |
32e6d806 | 4177 | fkey_map = Vfunction_key_map; |
284f4730 | 4178 | |
f4255cd1 | 4179 | goto replay_sequence; |
284f4730 JB |
4180 | } |
4181 | ||
f4255cd1 | 4182 | fkey_map = get_keymap_1 (fkey_next, 0, 1); |
284f4730 | 4183 | |
a764a753 JB |
4184 | /* If we no longer have a bound suffix, try a new positions for |
4185 | fkey_start. */ | |
284f4730 JB |
4186 | if (NILP (fkey_map)) |
4187 | { | |
4188 | fkey_end = ++fkey_start; | |
4189 | fkey_map = Vfunction_key_map; | |
4190 | } | |
4191 | } | |
4192 | } | |
4193 | } | |
4194 | ||
4195 | read_key_sequence_cmd = (first_binding < nmaps | |
4196 | ? defs[first_binding] | |
4197 | : Qnil); | |
4198 | ||
f4255cd1 | 4199 | done: |
cd21b839 | 4200 | unread_switch_frame = delayed_switch_frame; |
f4255cd1 | 4201 | unbind_to (count, Qnil); |
07f76a14 JB |
4202 | |
4203 | /* Occasionally we fabricate events, perhaps by expanding something | |
4204 | according to function-key-map, or by adding a prefix symbol to a | |
4205 | mouse click in the scroll bar or modeline. In this cases, return | |
4206 | the entire generated key sequence, even if we hit an unbound | |
4207 | prefix or a definition before the end. This means that you will | |
4208 | be able to push back the event properly, and also means that | |
4209 | read-key-sequence will always return a logical unit. | |
4210 | ||
4211 | Better ideas? */ | |
cca310da JB |
4212 | for (; t < mock_input; t++) |
4213 | { | |
4214 | echo_char (keybuf[t]); | |
4215 | add_command_key (keybuf[t]); | |
4216 | } | |
07f76a14 | 4217 | |
284f4730 JB |
4218 | return t; |
4219 | } | |
4220 | ||
c0a58692 | 4221 | DEFUN ("read-key-sequence", Fread_key_sequence, Sread_key_sequence, 1, 2, 0, |
284f4730 JB |
4222 | "Read a sequence of keystrokes and return as a string or vector.\n\ |
4223 | The sequence is sufficient to specify a non-prefix command in the\n\ | |
4224 | current local and global maps.\n\ | |
4225 | \n\ | |
c0a58692 RS |
4226 | First arg PROMPT is a prompt string. If nil, do not prompt specially.\n\ |
4227 | Second (optional) arg CONTINUE-ECHO, if non-nil, means this key echos\n\ | |
4228 | as a continuation of the previous key.\n\ | |
284f4730 | 4229 | \n\ |
cb5df6ae JB |
4230 | A C-g typed while in this function is treated like any other character,\n\ |
4231 | and `quit-flag' is not set.\n\ | |
4232 | \n\ | |
4233 | If the key sequence starts with a mouse click, then the sequence is read\n\ | |
4234 | using the keymaps of the buffer of the window clicked in, not the buffer\n\ | |
4235 | of the selected window as normal.\n\ | |
4236 | \n\ | |
4237 | `read-key-sequence' drops unbound button-down events, since you normally\n\ | |
4238 | only care about the click or drag events which follow them. If a drag\n\ | |
fbcd35bd JB |
4239 | or multi-click event is unbound, but the corresponding click event would\n\ |
4240 | be bound, `read-key-sequence' turns the event into a click event at the\n\ | |
cb5df6ae | 4241 | drag's starting position. This means that you don't have to distinguish\n\ |
fbcd35bd | 4242 | between click and drag, double, or triple events unless you want to.\n\ |
cb5df6ae JB |
4243 | \n\ |
4244 | `read-key-sequence' prefixes mouse events on mode lines, the vertical\n\ | |
3c370943 JB |
4245 | lines separating windows, and scroll bars with imaginary keys\n\ |
4246 | `mode-line', `vertical-line', and `vertical-scroll-bar'.\n\ | |
cb5df6ae JB |
4247 | \n\ |
4248 | If the user switches frames in the middle of a key sequence, the\n\ | |
4249 | frame-switch event is put off until after the current key sequence.\n\ | |
4250 | \n\ | |
4251 | `read-key-sequence' checks `function-key-map' for function key\n\ | |
4252 | sequences, where they wouldn't conflict with ordinary bindings. See\n\ | |
4bb994d1 | 4253 | `function-key-map' for more details.") |
c0a58692 RS |
4254 | (prompt, continue_echo) |
4255 | Lisp_Object prompt, continue_echo; | |
284f4730 JB |
4256 | { |
4257 | Lisp_Object keybuf[30]; | |
4258 | register int i; | |
4259 | struct gcpro gcpro1, gcpro2; | |
4260 | ||
4261 | if (!NILP (prompt)) | |
4262 | CHECK_STRING (prompt, 0); | |
4263 | QUIT; | |
4264 | ||
4265 | bzero (keybuf, sizeof keybuf); | |
4266 | GCPRO1 (keybuf[0]); | |
4267 | gcpro1.nvars = (sizeof keybuf/sizeof (keybuf[0])); | |
4268 | ||
daa37602 | 4269 | if (NILP (continue_echo)) |
c0a58692 RS |
4270 | this_command_key_count = 0; |
4271 | ||
284f4730 | 4272 | i = read_key_sequence (keybuf, (sizeof keybuf/sizeof (keybuf[0])), |
f4255cd1 | 4273 | NILP (prompt) ? 0 : XSTRING (prompt)->data); |
284f4730 | 4274 | |
dcc408a0 RS |
4275 | if (i == -1) |
4276 | { | |
4277 | Vquit_flag = Qt; | |
4278 | QUIT; | |
4279 | } | |
284f4730 | 4280 | UNGCPRO; |
86e5706b | 4281 | return make_event_array (i, keybuf); |
284f4730 JB |
4282 | } |
4283 | \f | |
4284 | DEFUN ("command-execute", Fcommand_execute, Scommand_execute, 1, 2, 0, | |
4285 | "Execute CMD as an editor command.\n\ | |
4286 | CMD must be a symbol that satisfies the `commandp' predicate.\n\ | |
4287 | Optional second arg RECORD-FLAG non-nil\n\ | |
4288 | means unconditionally put this command in `command-history'.\n\ | |
4289 | Otherwise, that is done only if an arg is read using the minibuffer.") | |
4290 | (cmd, record) | |
4291 | Lisp_Object cmd, record; | |
4292 | { | |
4293 | register Lisp_Object final; | |
4294 | register Lisp_Object tem; | |
4295 | Lisp_Object prefixarg; | |
4296 | struct backtrace backtrace; | |
4297 | extern int debug_on_next_call; | |
4298 | ||
4299 | prefixarg = Vprefix_arg, Vprefix_arg = Qnil; | |
4300 | Vcurrent_prefix_arg = prefixarg; | |
4301 | debug_on_next_call = 0; | |
4302 | ||
4303 | if (XTYPE (cmd) == Lisp_Symbol) | |
4304 | { | |
4305 | tem = Fget (cmd, Qdisabled); | |
4306 | if (!NILP (tem)) | |
2e894dab | 4307 | return call1 (Vrun_hooks, Qdisabled_command_hook); |
284f4730 JB |
4308 | } |
4309 | ||
4310 | while (1) | |
4311 | { | |
ffd56f97 | 4312 | final = Findirect_function (cmd); |
284f4730 JB |
4313 | |
4314 | if (CONSP (final) && (tem = Fcar (final), EQ (tem, Qautoload))) | |
4315 | do_autoload (final, cmd); | |
4316 | else | |
4317 | break; | |
4318 | } | |
4319 | ||
4320 | if (XTYPE (final) == Lisp_String | |
4321 | || XTYPE (final) == Lisp_Vector) | |
4322 | { | |
4323 | /* If requested, place the macro in the command history. For | |
4324 | other sorts of commands, call-interactively takes care of | |
4325 | this. */ | |
4326 | if (!NILP (record)) | |
4327 | Vcommand_history | |
4328 | = Fcons (Fcons (Qexecute_kbd_macro, | |
4329 | Fcons (final, Fcons (prefixarg, Qnil))), | |
4330 | Vcommand_history); | |
4331 | ||
4332 | return Fexecute_kbd_macro (final, prefixarg); | |
4333 | } | |
4334 | if (CONSP (final) || XTYPE (final) == Lisp_Subr | |
4335 | || XTYPE (final) == Lisp_Compiled) | |
4336 | { | |
4337 | backtrace.next = backtrace_list; | |
4338 | backtrace_list = &backtrace; | |
4339 | backtrace.function = &Qcall_interactively; | |
4340 | backtrace.args = &cmd; | |
4341 | backtrace.nargs = 1; | |
4342 | backtrace.evalargs = 0; | |
4343 | ||
4344 | tem = Fcall_interactively (cmd, record); | |
4345 | ||
4346 | backtrace_list = backtrace.next; | |
4347 | return tem; | |
4348 | } | |
4349 | return Qnil; | |
4350 | } | |
4351 | \f | |
284f4730 JB |
4352 | DEFUN ("execute-extended-command", Fexecute_extended_command, Sexecute_extended_command, |
4353 | 1, 1, "P", | |
4354 | "Read function name, then read its arguments and call it.") | |
4355 | (prefixarg) | |
4356 | Lisp_Object prefixarg; | |
4357 | { | |
4358 | Lisp_Object function; | |
4359 | char buf[40]; | |
4360 | Lisp_Object saved_keys; | |
4361 | struct gcpro gcpro1; | |
4362 | ||
4363 | saved_keys = Fthis_command_keys (); | |
4364 | buf[0] = 0; | |
4365 | GCPRO1 (saved_keys); | |
4366 | ||
4367 | if (EQ (prefixarg, Qminus)) | |
4368 | strcpy (buf, "- "); | |
4369 | else if (CONSP (prefixarg) && XINT (XCONS (prefixarg)->car) == 4) | |
4370 | strcpy (buf, "C-u "); | |
4371 | else if (CONSP (prefixarg) && XTYPE (XCONS (prefixarg)->car) == Lisp_Int) | |
4372 | sprintf (buf, "%d ", XINT (XCONS (prefixarg)->car)); | |
4373 | else if (XTYPE (prefixarg) == Lisp_Int) | |
4374 | sprintf (buf, "%d ", XINT (prefixarg)); | |
4375 | ||
4376 | /* This isn't strictly correct if execute-extended-command | |
4377 | is bound to anything else. Perhaps it should use | |
4378 | this_command_keys? */ | |
4379 | strcat (buf, "M-x "); | |
4380 | ||
4381 | /* Prompt with buf, and then read a string, completing from and | |
4382 | restricting to the set of all defined commands. Don't provide | |
4383 | any initial input. The last Qnil says not to perform a | |
4384 | peculiar hack on the initial input. */ | |
4385 | function = Fcompleting_read (build_string (buf), | |
4386 | Vobarray, Qcommandp, | |
4387 | Qt, Qnil, Qnil); | |
4388 | ||
1113d9db JB |
4389 | /* Set this_command_keys to the concatenation of saved_keys and |
4390 | function, followed by a RET. */ | |
284f4730 | 4391 | { |
1113d9db | 4392 | struct Lisp_String *str; |
284f4730 JB |
4393 | int i; |
4394 | Lisp_Object tem; | |
4395 | ||
1113d9db JB |
4396 | this_command_key_count = 0; |
4397 | ||
4398 | str = XSTRING (saved_keys); | |
4399 | for (i = 0; i < str->size; i++) | |
284f4730 | 4400 | { |
1113d9db | 4401 | XFASTINT (tem) = str->data[i]; |
284f4730 JB |
4402 | add_command_key (tem); |
4403 | } | |
1113d9db JB |
4404 | |
4405 | str = XSTRING (function); | |
4406 | for (i = 0; i < str->size; i++) | |
4407 | { | |
4408 | XFASTINT (tem) = str->data[i]; | |
4409 | add_command_key (tem); | |
4410 | } | |
4411 | ||
4412 | XFASTINT (tem) = '\015'; | |
4413 | add_command_key (tem); | |
284f4730 JB |
4414 | } |
4415 | ||
4416 | UNGCPRO; | |
4417 | ||
0a7f1fc0 | 4418 | function = Fintern (function, Qnil); |
284f4730 JB |
4419 | Vprefix_arg = prefixarg; |
4420 | this_command = function; | |
4421 | ||
4422 | return Fcommand_execute (function, Qt); | |
4423 | } | |
4424 | \f | |
4425 | ||
4426 | detect_input_pending () | |
4427 | { | |
4428 | if (!input_pending) | |
4429 | get_input_pending (&input_pending); | |
4430 | ||
4431 | return input_pending; | |
4432 | } | |
4433 | ||
ffd56f97 JB |
4434 | /* This is called in some cases before a possible quit. |
4435 | It cases the next call to detect_input_pending to recompute input_pending. | |
4436 | So calling this function unnecessarily can't do any harm. */ | |
4437 | clear_input_pending () | |
4438 | { | |
4439 | input_pending = 0; | |
4440 | } | |
4441 | ||
284f4730 JB |
4442 | DEFUN ("input-pending-p", Finput_pending_p, Sinput_pending_p, 0, 0, 0, |
4443 | "T if command input is currently available with no waiting.\n\ | |
4444 | Actually, the value is nil only if we can be sure that no input is available.") | |
4445 | () | |
4446 | { | |
86e5706b | 4447 | if (!NILP (unread_command_events) || unread_command_char != -1) |
284f4730 JB |
4448 | return (Qt); |
4449 | ||
4450 | return detect_input_pending () ? Qt : Qnil; | |
4451 | } | |
4452 | ||
4453 | DEFUN ("recent-keys", Frecent_keys, Srecent_keys, 0, 0, 0, | |
22d7cb89 | 4454 | "Return vector of last 100 events, not counting those from keyboard macros.") |
284f4730 JB |
4455 | () |
4456 | { | |
5160df46 | 4457 | Lisp_Object *keys = XVECTOR (recent_keys)->contents; |
284f4730 JB |
4458 | Lisp_Object val; |
4459 | ||
4460 | if (total_keys < NUM_RECENT_KEYS) | |
5160df46 | 4461 | return Fvector (total_keys, keys); |
284f4730 JB |
4462 | else |
4463 | { | |
5160df46 JB |
4464 | val = Fvector (NUM_RECENT_KEYS, keys); |
4465 | bcopy (keys + recent_keys_index, | |
284f4730 JB |
4466 | XVECTOR (val)->contents, |
4467 | (NUM_RECENT_KEYS - recent_keys_index) * sizeof (Lisp_Object)); | |
5160df46 | 4468 | bcopy (keys, |
284f4730 JB |
4469 | XVECTOR (val)->contents + NUM_RECENT_KEYS - recent_keys_index, |
4470 | recent_keys_index * sizeof (Lisp_Object)); | |
4471 | return val; | |
4472 | } | |
4473 | } | |
4474 | ||
4475 | DEFUN ("this-command-keys", Fthis_command_keys, Sthis_command_keys, 0, 0, 0, | |
e5f920d7 RS |
4476 | "Return the key sequence that invoked this command.\n\ |
4477 | The value is a string or a vector.") | |
284f4730 JB |
4478 | () |
4479 | { | |
86e5706b RS |
4480 | return make_event_array (this_command_key_count, |
4481 | XVECTOR (this_command_keys)->contents); | |
284f4730 JB |
4482 | } |
4483 | ||
4484 | DEFUN ("recursion-depth", Frecursion_depth, Srecursion_depth, 0, 0, 0, | |
4485 | "Return the current depth in recursive edits.") | |
4486 | () | |
4487 | { | |
4488 | Lisp_Object temp; | |
4489 | XFASTINT (temp) = command_loop_level + minibuf_level; | |
4490 | return temp; | |
4491 | } | |
4492 | ||
4493 | DEFUN ("open-dribble-file", Fopen_dribble_file, Sopen_dribble_file, 1, 1, | |
4494 | "FOpen dribble file: ", | |
9b2471df RS |
4495 | "Start writing all keyboard characters to a dribble file called FILE.\n\ |
4496 | If FILE is nil, close any open dribble file.") | |
284f4730 JB |
4497 | (file) |
4498 | Lisp_Object file; | |
4499 | { | |
4500 | if (NILP (file)) | |
4501 | { | |
4502 | fclose (dribble); | |
4503 | dribble = 0; | |
4504 | } | |
4505 | else | |
4506 | { | |
4507 | file = Fexpand_file_name (file, Qnil); | |
4508 | dribble = fopen (XSTRING (file)->data, "w"); | |
4509 | } | |
4510 | return Qnil; | |
4511 | } | |
4512 | ||
4513 | DEFUN ("discard-input", Fdiscard_input, Sdiscard_input, 0, 0, 0, | |
4514 | "Discard the contents of the terminal input buffer.\n\ | |
4515 | Also cancel any kbd macro being defined.") | |
4516 | () | |
4517 | { | |
4518 | defining_kbd_macro = 0; | |
4519 | update_mode_lines++; | |
4520 | ||
dbc4e1c1 | 4521 | unread_command_events = Qnil; |
86e5706b | 4522 | unread_command_char = -1; |
284f4730 JB |
4523 | |
4524 | discard_tty_input (); | |
4525 | ||
ff0b5f4c JB |
4526 | /* Without the cast, GCC complains that this assignment loses the |
4527 | volatile qualifier of kbd_store_ptr. Is there anything wrong | |
4528 | with that? */ | |
4529 | kbd_fetch_ptr = (struct input_event *) kbd_store_ptr; | |
7b4aedb9 | 4530 | Ffillarray (kbd_buffer_frame_or_window, Qnil); |
284f4730 JB |
4531 | input_pending = 0; |
4532 | ||
4533 | return Qnil; | |
4534 | } | |
4535 | \f | |
4536 | DEFUN ("suspend-emacs", Fsuspend_emacs, Ssuspend_emacs, 0, 1, "", | |
4537 | "Stop Emacs and return to superior process. You can resume later.\n\ | |
4538 | On systems that don't have job control, run a subshell instead.\n\n\ | |
4539 | If optional arg STUFFSTRING is non-nil, its characters are stuffed\n\ | |
b7d2ebbf RS |
4540 | to be read as terminal input by Emacs's parent, after suspension.\n\ |
4541 | \n\ | |
7df30614 | 4542 | Before suspending, call the functions in `suspend-hook' with no args.\n\ |
b7d2ebbf RS |
4543 | If any of them returns nil, don't call the rest and don't suspend.\n\ |
4544 | Otherwise, suspend normally and after resumption run the normal hook\n\ | |
284f4730 JB |
4545 | `suspend-resume-hook' if that is bound and non-nil.\n\ |
4546 | \n\ | |
4547 | Some operating systems cannot stop the Emacs process and resume it later.\n\ | |
b7d2ebbf | 4548 | On such systems, Emacs starts a subshell instead of suspending.") |
284f4730 JB |
4549 | (stuffstring) |
4550 | Lisp_Object stuffstring; | |
4551 | { | |
3a69360c | 4552 | Lisp_Object tem; |
284f4730 JB |
4553 | int count = specpdl_ptr - specpdl; |
4554 | int old_height, old_width; | |
4555 | int width, height; | |
b7d2ebbf | 4556 | struct gcpro gcpro1, gcpro2; |
284f4730 JB |
4557 | extern init_sys_modes (); |
4558 | ||
4559 | if (!NILP (stuffstring)) | |
4560 | CHECK_STRING (stuffstring, 0); | |
284f4730 | 4561 | |
1e95ed28 JB |
4562 | /* Run the functions in suspend-hook. */ |
4563 | if (!NILP (Vrun_hooks)) | |
4564 | call1 (Vrun_hooks, intern ("suspend-hook")); | |
284f4730 | 4565 | |
b7d2ebbf | 4566 | GCPRO1 (stuffstring); |
ff11dfa1 | 4567 | get_frame_size (&old_width, &old_height); |
284f4730 JB |
4568 | reset_sys_modes (); |
4569 | /* sys_suspend can get an error if it tries to fork a subshell | |
4570 | and the system resources aren't available for that. */ | |
4571 | record_unwind_protect (init_sys_modes, 0); | |
4572 | stuff_buffered_input (stuffstring); | |
4573 | sys_suspend (); | |
4574 | unbind_to (count, Qnil); | |
4575 | ||
4576 | /* Check if terminal/window size has changed. | |
4577 | Note that this is not useful when we are running directly | |
4578 | with a window system; but suspend should be disabled in that case. */ | |
ff11dfa1 | 4579 | get_frame_size (&width, &height); |
284f4730 | 4580 | if (width != old_width || height != old_height) |
d5045cf9 | 4581 | change_frame_size (0, height, width, 0, 0); |
284f4730 | 4582 | |
1e95ed28 | 4583 | /* Run suspend-resume-hook. */ |
284f4730 JB |
4584 | if (!NILP (Vrun_hooks)) |
4585 | call1 (Vrun_hooks, intern ("suspend-resume-hook")); | |
4586 | ||
4587 | UNGCPRO; | |
4588 | return Qnil; | |
4589 | } | |
4590 | ||
4591 | /* If STUFFSTRING is a string, stuff its contents as pending terminal input. | |
eb8c3be9 | 4592 | Then in any case stuff anything Emacs has read ahead and not used. */ |
284f4730 JB |
4593 | |
4594 | stuff_buffered_input (stuffstring) | |
4595 | Lisp_Object stuffstring; | |
4596 | { | |
4597 | register unsigned char *p; | |
4598 | ||
4599 | /* stuff_char works only in BSD, versions 4.2 and up. */ | |
4600 | #ifdef BSD | |
4601 | #ifndef BSD4_1 | |
4602 | if (XTYPE (stuffstring) == Lisp_String) | |
4603 | { | |
4604 | register int count; | |
4605 | ||
4606 | p = XSTRING (stuffstring)->data; | |
4607 | count = XSTRING (stuffstring)->size; | |
4608 | while (count-- > 0) | |
4609 | stuff_char (*p++); | |
4610 | stuff_char ('\n'); | |
4611 | } | |
4612 | /* Anything we have read ahead, put back for the shell to read. */ | |
4613 | while (kbd_fetch_ptr != kbd_store_ptr) | |
4614 | { | |
4615 | if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE) | |
4616 | kbd_fetch_ptr = kbd_buffer; | |
4617 | if (kbd_fetch_ptr->kind == ascii_keystroke) | |
4618 | stuff_char (XINT (kbd_fetch_ptr->code)); | |
4bb994d1 | 4619 | kbd_fetch_ptr->kind = no_event; |
7b4aedb9 JB |
4620 | (XVECTOR (kbd_buffer_frame_or_window)->contents[kbd_fetch_ptr |
4621 | - kbd_buffer] | |
4622 | = Qnil); | |
284f4730 JB |
4623 | kbd_fetch_ptr++; |
4624 | } | |
4625 | input_pending = 0; | |
4626 | #endif | |
4627 | #endif /* BSD and not BSD4_1 */ | |
4628 | } | |
4629 | \f | |
ffd56f97 JB |
4630 | set_waiting_for_input (time_to_clear) |
4631 | EMACS_TIME *time_to_clear; | |
284f4730 | 4632 | { |
ffd56f97 | 4633 | input_available_clear_time = time_to_clear; |
284f4730 JB |
4634 | |
4635 | /* Tell interrupt_signal to throw back to read_char, */ | |
4636 | waiting_for_input = 1; | |
4637 | ||
4638 | /* If interrupt_signal was called before and buffered a C-g, | |
4639 | make it run again now, to avoid timing error. */ | |
4640 | if (!NILP (Vquit_flag)) | |
4641 | quit_throw_to_read_char (); | |
4642 | ||
4643 | /* If alarm has gone off already, echo now. */ | |
4644 | if (echo_flag) | |
4645 | { | |
4646 | echo (); | |
4647 | echo_flag = 0; | |
4648 | } | |
4649 | } | |
4650 | ||
4651 | clear_waiting_for_input () | |
4652 | { | |
4653 | /* Tell interrupt_signal not to throw back to read_char, */ | |
4654 | waiting_for_input = 0; | |
ffd56f97 | 4655 | input_available_clear_time = 0; |
284f4730 JB |
4656 | } |
4657 | ||
4658 | /* This routine is called at interrupt level in response to C-G. | |
4659 | If interrupt_input, this is the handler for SIGINT. | |
4660 | Otherwise, it is called from kbd_buffer_store_event, | |
4661 | in handling SIGIO or SIGTINT. | |
4662 | ||
4663 | If `waiting_for_input' is non zero, then unless `echoing' is nonzero, | |
4664 | immediately throw back to read_char. | |
4665 | ||
4666 | Otherwise it sets the Lisp variable quit-flag not-nil. | |
4667 | This causes eval to throw, when it gets a chance. | |
4668 | If quit-flag is already non-nil, it stops the job right away. */ | |
4669 | ||
4670 | SIGTYPE | |
4671 | interrupt_signal () | |
4672 | { | |
4673 | char c; | |
4674 | /* Must preserve main program's value of errno. */ | |
4675 | int old_errno = errno; | |
284f4730 JB |
4676 | |
4677 | #ifdef USG | |
4678 | /* USG systems forget handlers when they are used; | |
4679 | must reestablish each time */ | |
4680 | signal (SIGINT, interrupt_signal); | |
4681 | signal (SIGQUIT, interrupt_signal); | |
4682 | #endif /* USG */ | |
4683 | ||
4684 | cancel_echoing (); | |
4685 | ||
d5045cf9 | 4686 | if (!NILP (Vquit_flag) && FRAME_TERMCAP_P (selected_frame)) |
284f4730 JB |
4687 | { |
4688 | fflush (stdout); | |
4689 | reset_sys_modes (); | |
4690 | sigfree (); | |
4691 | #ifdef SIGTSTP /* Support possible in later USG versions */ | |
4692 | /* | |
4693 | * On systems which can suspend the current process and return to the original | |
4694 | * shell, this command causes the user to end up back at the shell. | |
4695 | * The "Auto-save" and "Abort" questions are not asked until | |
4696 | * the user elects to return to emacs, at which point he can save the current | |
4697 | * job and either dump core or continue. | |
4698 | */ | |
4699 | sys_suspend (); | |
4700 | #else | |
4701 | #ifdef VMS | |
4702 | if (sys_suspend () == -1) | |
4703 | { | |
4704 | printf ("Not running as a subprocess;\n"); | |
4705 | printf ("you can continue or abort.\n"); | |
4706 | } | |
4707 | #else /* not VMS */ | |
4708 | /* Perhaps should really fork an inferior shell? | |
4709 | But that would not provide any way to get back | |
4710 | to the original shell, ever. */ | |
4711 | printf ("No support for stopping a process on this operating system;\n"); | |
4712 | printf ("you can continue or abort.\n"); | |
4713 | #endif /* not VMS */ | |
4714 | #endif /* not SIGTSTP */ | |
4715 | printf ("Auto-save? (y or n) "); | |
4716 | fflush (stdout); | |
4717 | if (((c = getchar ()) & ~040) == 'Y') | |
4718 | Fdo_auto_save (Qnil, Qnil); | |
4719 | while (c != '\n') c = getchar (); | |
4720 | #ifdef VMS | |
4721 | printf ("Abort (and enter debugger)? (y or n) "); | |
4722 | #else /* not VMS */ | |
4723 | printf ("Abort (and dump core)? (y or n) "); | |
4724 | #endif /* not VMS */ | |
4725 | fflush (stdout); | |
4726 | if (((c = getchar ()) & ~040) == 'Y') | |
4727 | abort (); | |
4728 | while (c != '\n') c = getchar (); | |
4729 | printf ("Continuing...\n"); | |
4730 | fflush (stdout); | |
4731 | init_sys_modes (); | |
4732 | } | |
4733 | else | |
4734 | { | |
4735 | /* If executing a function that wants to be interrupted out of | |
4736 | and the user has not deferred quitting by binding `inhibit-quit' | |
4737 | then quit right away. */ | |
4738 | if (immediate_quit && NILP (Vinhibit_quit)) | |
4739 | { | |
4740 | immediate_quit = 0; | |
4741 | sigfree (); | |
4742 | Fsignal (Qquit, Qnil); | |
4743 | } | |
4744 | else | |
4745 | /* Else request quit when it's safe */ | |
4746 | Vquit_flag = Qt; | |
4747 | } | |
4748 | ||
4749 | if (waiting_for_input && !echoing) | |
4750 | quit_throw_to_read_char (); | |
4751 | ||
4752 | errno = old_errno; | |
4753 | } | |
4754 | ||
4755 | /* Handle a C-g by making read_char return C-g. */ | |
4756 | ||
4757 | quit_throw_to_read_char () | |
4758 | { | |
4759 | quit_error_check (); | |
4760 | sigfree (); | |
4761 | /* Prevent another signal from doing this before we finish. */ | |
f76475ad | 4762 | clear_waiting_for_input (); |
284f4730 JB |
4763 | input_pending = 0; |
4764 | ||
dbc4e1c1 | 4765 | unread_command_events = Qnil; |
86e5706b | 4766 | unread_command_char = -1; |
284f4730 | 4767 | |
e6b01c14 JB |
4768 | #ifdef POLL_FOR_INPUT |
4769 | /* May be > 1 if in recursive minibuffer. */ | |
4770 | if (poll_suppress_count == 0) | |
4771 | abort (); | |
4772 | #endif | |
4773 | ||
284f4730 JB |
4774 | _longjmp (getcjmp, 1); |
4775 | } | |
4776 | \f | |
4777 | DEFUN ("set-input-mode", Fset_input_mode, Sset_input_mode, 3, 4, 0, | |
4778 | "Set mode of reading keyboard input.\n\ | |
464f8898 RS |
4779 | First arg INTERRUPT non-nil means use input interrupts;\n\ |
4780 | nil means use CBREAK mode.\n\ | |
4781 | Second arg FLOW non-nil means use ^S/^Q flow control for output to terminal\n\ | |
284f4730 | 4782 | (no effect except in CBREAK mode).\n\ |
b04904fb RS |
4783 | Third arg META t means accept 8-bit input (for a Meta key).\n\ |
4784 | META nil means ignore the top bit, on the assumption it is parity.\n\ | |
4785 | Otherwise, accept 8-bit input and don't use the top bit for Meta.\n\ | |
a8ee7ef9 RS |
4786 | Optional fourth arg QUIT if non-nil specifies character to use for quitting.\n\ |
4787 | See also `current-input-mode'.") | |
284f4730 JB |
4788 | (interrupt, flow, meta, quit) |
4789 | Lisp_Object interrupt, flow, meta, quit; | |
4790 | { | |
4791 | if (!NILP (quit) | |
4792 | && (XTYPE (quit) != Lisp_Int | |
4793 | || XINT (quit) < 0 || XINT (quit) > 0400)) | |
4794 | error ("set-input-mode: QUIT must be an ASCII character."); | |
4795 | ||
4796 | reset_sys_modes (); | |
4797 | #ifdef SIGIO | |
4798 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
4799 | #ifdef NO_SOCK_SIGIO | |
4800 | if (read_socket_hook) | |
4801 | interrupt_input = 0; /* No interrupts if reading from a socket. */ | |
4802 | else | |
4803 | #endif /* NO_SOCK_SIGIO */ | |
4804 | interrupt_input = !NILP (interrupt); | |
4805 | #else /* not SIGIO */ | |
4806 | interrupt_input = 0; | |
4807 | #endif /* not SIGIO */ | |
4808 | /* Our VMS input only works by interrupts, as of now. */ | |
4809 | #ifdef VMS | |
4810 | interrupt_input = 1; | |
4811 | #endif | |
4812 | flow_control = !NILP (flow); | |
b04904fb RS |
4813 | if (NILP (meta)) |
4814 | meta_key = 0; | |
4815 | else if (EQ (meta, Qt)) | |
4816 | meta_key = 1; | |
4817 | else | |
4818 | meta_key = 2; | |
284f4730 JB |
4819 | if (!NILP (quit)) |
4820 | /* Don't let this value be out of range. */ | |
4821 | quit_char = XINT (quit) & (meta_key ? 0377 : 0177); | |
4822 | ||
4823 | init_sys_modes (); | |
4824 | return Qnil; | |
4825 | } | |
80645119 JB |
4826 | |
4827 | DEFUN ("current-input-mode", Fcurrent_input_mode, Scurrent_input_mode, 0, 0, 0, | |
4828 | "Return information about the way Emacs currently reads keyboard input.\n\ | |
4829 | The value is a list of the form (INTERRUPT FLOW META QUIT), where\n\ | |
4830 | INTERRUPT is non-nil if Emacs is using interrupt-driven input; if\n\ | |
4831 | nil, Emacs is using CBREAK mode.\n\ | |
4832 | FLOW is non-nil if Emacs uses ^S/^Q flow control for output to the\n\ | |
4833 | terminal; this does not apply if Emacs uses interrupt-driven input.\n\ | |
a8ee7ef9 RS |
4834 | META is t if accepting 8-bit input with 8th bit as Meta flag.\n\ |
4835 | META nil means ignoring the top bit, on the assumption it is parity.\n\ | |
4836 | META is neither t nor nil if accepting 8-bit input and using\n\ | |
4837 | all 8 bits as the character code.\n\ | |
80645119 JB |
4838 | QUIT is the character Emacs currently uses to quit.\n\ |
4839 | The elements of this list correspond to the arguments of\n\ | |
a8ee7ef9 | 4840 | `set-input-mode'.") |
80645119 JB |
4841 | () |
4842 | { | |
4843 | Lisp_Object val[4]; | |
4844 | ||
4845 | val[0] = interrupt_input ? Qt : Qnil; | |
4846 | val[1] = flow_control ? Qt : Qnil; | |
a8ee7ef9 | 4847 | val[2] = meta_key == 2 ? make_number (0) : meta_key == 1 ? Qt : Qnil; |
7b50ece7 | 4848 | XFASTINT (val[3]) = quit_char; |
80645119 | 4849 | |
bf673a7a | 4850 | return Flist (sizeof (val) / sizeof (val[0]), val); |
80645119 JB |
4851 | } |
4852 | ||
284f4730 JB |
4853 | \f |
4854 | init_keyboard () | |
4855 | { | |
284f4730 JB |
4856 | /* This is correct before outermost invocation of the editor loop */ |
4857 | command_loop_level = -1; | |
4858 | immediate_quit = 0; | |
4859 | quit_char = Ctl ('g'); | |
dbc4e1c1 | 4860 | unread_command_events = Qnil; |
86e5706b | 4861 | unread_command_char = -1; |
284f4730 | 4862 | total_keys = 0; |
9deb415a | 4863 | recent_keys_index = 0; |
284f4730 JB |
4864 | kbd_fetch_ptr = kbd_buffer; |
4865 | kbd_store_ptr = kbd_buffer; | |
4866 | do_mouse_tracking = 0; | |
4867 | input_pending = 0; | |
4868 | ||
07d2b8de | 4869 | #ifdef MULTI_FRAME |
8f805655 JB |
4870 | /* This means that command_loop_1 won't try to select anything the first |
4871 | time through. */ | |
3c370943 JB |
4872 | internal_last_event_frame = Qnil; |
4873 | Vlast_event_frame = internal_last_event_frame; | |
7b4aedb9 JB |
4874 | #endif |
4875 | ||
4876 | /* If we're running a dumped Emacs, we need to clear out | |
4877 | kbd_buffer_frame_or_window, in case some events got into it | |
4878 | before we dumped. | |
4bb994d1 | 4879 | |
7b4aedb9 JB |
4880 | If we're running an undumped Emacs, it hasn't been initialized by |
4881 | syms_of_keyboard yet. */ | |
4bb994d1 | 4882 | if (initialized) |
7b4aedb9 | 4883 | Ffillarray (kbd_buffer_frame_or_window, Qnil); |
07d2b8de | 4884 | |
284f4730 JB |
4885 | if (!noninteractive) |
4886 | { | |
4887 | signal (SIGINT, interrupt_signal); | |
cb5df6ae | 4888 | #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS) |
284f4730 JB |
4889 | /* For systems with SysV TERMIO, C-g is set up for both SIGINT and |
4890 | SIGQUIT and we can't tell which one it will give us. */ | |
4891 | signal (SIGQUIT, interrupt_signal); | |
4892 | #endif /* HAVE_TERMIO */ | |
4893 | /* Note SIGIO has been undef'd if FIONREAD is missing. */ | |
4894 | #ifdef SIGIO | |
4895 | signal (SIGIO, input_available_signal); | |
8ea0a720 | 4896 | #endif /* SIGIO */ |
284f4730 JB |
4897 | } |
4898 | ||
4899 | /* Use interrupt input by default, if it works and noninterrupt input | |
4900 | has deficiencies. */ | |
4901 | ||
4902 | #ifdef INTERRUPT_INPUT | |
4903 | interrupt_input = 1; | |
4904 | #else | |
4905 | interrupt_input = 0; | |
4906 | #endif | |
4907 | ||
4908 | /* Our VMS input only works by interrupts, as of now. */ | |
4909 | #ifdef VMS | |
4910 | interrupt_input = 1; | |
4911 | #endif | |
4912 | ||
4913 | sigfree (); | |
4914 | dribble = 0; | |
4915 | ||
4916 | if (keyboard_init_hook) | |
4917 | (*keyboard_init_hook) (); | |
4918 | ||
4919 | #ifdef POLL_FOR_INPUT | |
4920 | poll_suppress_count = 1; | |
4921 | start_polling (); | |
4922 | #endif | |
4923 | } | |
4924 | ||
4925 | /* This type's only use is in syms_of_keyboard, to initialize the | |
4926 | event header symbols and put properties on them. */ | |
4927 | struct event_head { | |
4928 | Lisp_Object *var; | |
4929 | char *name; | |
4930 | Lisp_Object *kind; | |
4931 | }; | |
4932 | ||
4933 | struct event_head head_table[] = { | |
7b4aedb9 | 4934 | &Qmouse_movement, "mouse-movement", &Qmouse_movement, |
3c370943 | 4935 | &Qscroll_bar_movement, "scroll-bar-movement", &Qmouse_movement, |
7b4aedb9 | 4936 | &Qswitch_frame, "switch-frame", &Qswitch_frame, |
284f4730 JB |
4937 | }; |
4938 | ||
4939 | syms_of_keyboard () | |
4940 | { | |
2e894dab RS |
4941 | Qdisabled_command_hook = intern ("disabled-command-hook"); |
4942 | staticpro (&Qdisabled_command_hook); | |
4943 | ||
284f4730 JB |
4944 | Qself_insert_command = intern ("self-insert-command"); |
4945 | staticpro (&Qself_insert_command); | |
4946 | ||
4947 | Qforward_char = intern ("forward-char"); | |
4948 | staticpro (&Qforward_char); | |
4949 | ||
4950 | Qbackward_char = intern ("backward-char"); | |
4951 | staticpro (&Qbackward_char); | |
4952 | ||
4953 | Qdisabled = intern ("disabled"); | |
4954 | staticpro (&Qdisabled); | |
4955 | ||
e58aa385 RS |
4956 | Qundefined = intern ("undefined"); |
4957 | staticpro (&Qundefined); | |
4958 | ||
86e5706b RS |
4959 | Qpre_command_hook = intern ("pre-command-hook"); |
4960 | staticpro (&Qpre_command_hook); | |
4961 | ||
4962 | Qpost_command_hook = intern ("post-command-hook"); | |
4963 | staticpro (&Qpost_command_hook); | |
4964 | ||
284f4730 JB |
4965 | Qfunction_key = intern ("function-key"); |
4966 | staticpro (&Qfunction_key); | |
13b5e56c | 4967 | Qmouse_click = intern ("mouse-click"); |
284f4730 | 4968 | staticpro (&Qmouse_click); |
284f4730 | 4969 | |
598a9fa7 JB |
4970 | Qmenu_enable = intern ("menu-enable"); |
4971 | staticpro (&Qmenu_enable); | |
4972 | ||
284f4730 JB |
4973 | Qmode_line = intern ("mode-line"); |
4974 | staticpro (&Qmode_line); | |
e5d77022 JB |
4975 | Qvertical_line = intern ("vertical-line"); |
4976 | staticpro (&Qvertical_line); | |
3c370943 JB |
4977 | Qvertical_scroll_bar = intern ("vertical-scroll-bar"); |
4978 | staticpro (&Qvertical_scroll_bar); | |
5ec75a55 RS |
4979 | Qmenu_bar = intern ("menu-bar"); |
4980 | staticpro (&Qmenu_bar); | |
4bb994d1 JB |
4981 | |
4982 | Qabove_handle = intern ("above-handle"); | |
4983 | staticpro (&Qabove_handle); | |
4984 | Qhandle = intern ("handle"); | |
4985 | staticpro (&Qhandle); | |
4986 | Qbelow_handle = intern ("below-handle"); | |
4987 | staticpro (&Qbelow_handle); | |
284f4730 | 4988 | |
cd21b839 | 4989 | Qevent_kind = intern ("event-kind"); |
284f4730 | 4990 | staticpro (&Qevent_kind); |
88cb0656 JB |
4991 | Qevent_symbol_elements = intern ("event-symbol-elements"); |
4992 | staticpro (&Qevent_symbol_elements); | |
0a7f1fc0 JB |
4993 | Qevent_symbol_element_mask = intern ("event-symbol-element-mask"); |
4994 | staticpro (&Qevent_symbol_element_mask); | |
4995 | Qmodifier_cache = intern ("modifier-cache"); | |
4996 | staticpro (&Qmodifier_cache); | |
284f4730 | 4997 | |
48e416d4 RS |
4998 | Qrecompute_lucid_menubar = intern ("recompute-lucid-menubar"); |
4999 | staticpro (&Qrecompute_lucid_menubar); | |
5000 | Qactivate_menubar_hook = intern ("activate-menubar-hook"); | |
5001 | staticpro (&Qactivate_menubar_hook); | |
5002 | ||
284f4730 JB |
5003 | { |
5004 | struct event_head *p; | |
5005 | ||
5006 | for (p = head_table; | |
5007 | p < head_table + (sizeof (head_table) / sizeof (head_table[0])); | |
5008 | p++) | |
5009 | { | |
5010 | *p->var = intern (p->name); | |
5011 | staticpro (p->var); | |
5012 | Fput (*p->var, Qevent_kind, *p->kind); | |
88cb0656 | 5013 | Fput (*p->var, Qevent_symbol_elements, Fcons (*p->var, Qnil)); |
284f4730 JB |
5014 | } |
5015 | } | |
5016 | ||
7b4aedb9 JB |
5017 | button_down_location = Fmake_vector (make_number (NUM_MOUSE_BUTTONS), Qnil); |
5018 | staticpro (&button_down_location); | |
88cb0656 JB |
5019 | |
5020 | { | |
5021 | int i; | |
5022 | int len = sizeof (modifier_names) / sizeof (modifier_names[0]); | |
5023 | ||
5024 | modifier_symbols = Fmake_vector (make_number (len), Qnil); | |
5025 | for (i = 0; i < len; i++) | |
86e5706b RS |
5026 | if (modifier_names[i]) |
5027 | XVECTOR (modifier_symbols)->contents[i] = intern (modifier_names[i]); | |
88cb0656 JB |
5028 | staticpro (&modifier_symbols); |
5029 | } | |
5030 | ||
9deb415a JB |
5031 | recent_keys = Fmake_vector (make_number (NUM_RECENT_KEYS), Qnil); |
5032 | staticpro (&recent_keys); | |
5033 | ||
6569cc8d | 5034 | this_command_keys = Fmake_vector (make_number (40), Qnil); |
715d9345 | 5035 | staticpro (&this_command_keys); |
6569cc8d | 5036 | |
7b4aedb9 JB |
5037 | kbd_buffer_frame_or_window |
5038 | = Fmake_vector (make_number (KBD_BUFFER_SIZE), Qnil); | |
5039 | staticpro (&kbd_buffer_frame_or_window); | |
4bb994d1 | 5040 | |
284f4730 JB |
5041 | func_key_syms = Qnil; |
5042 | staticpro (&func_key_syms); | |
5043 | ||
5044 | mouse_syms = Qnil; | |
5045 | staticpro (&mouse_syms); | |
5046 | ||
cd21b839 JB |
5047 | unread_switch_frame = Qnil; |
5048 | staticpro (&unread_switch_frame); | |
5049 | ||
284f4730 JB |
5050 | defsubr (&Sread_key_sequence); |
5051 | defsubr (&Srecursive_edit); | |
5052 | defsubr (&Strack_mouse); | |
284f4730 JB |
5053 | defsubr (&Sinput_pending_p); |
5054 | defsubr (&Scommand_execute); | |
5055 | defsubr (&Srecent_keys); | |
5056 | defsubr (&Sthis_command_keys); | |
5057 | defsubr (&Ssuspend_emacs); | |
5058 | defsubr (&Sabort_recursive_edit); | |
5059 | defsubr (&Sexit_recursive_edit); | |
5060 | defsubr (&Srecursion_depth); | |
5061 | defsubr (&Stop_level); | |
5062 | defsubr (&Sdiscard_input); | |
5063 | defsubr (&Sopen_dribble_file); | |
5064 | defsubr (&Sset_input_mode); | |
80645119 | 5065 | defsubr (&Scurrent_input_mode); |
284f4730 JB |
5066 | defsubr (&Sexecute_extended_command); |
5067 | ||
284f4730 | 5068 | DEFVAR_LISP ("last-command-char", &last_command_char, |
86e5706b RS |
5069 | "Last input event that was part of a command."); |
5070 | ||
5071 | DEFVAR_LISP ("last-command-event", &last_command_char, | |
5072 | "Last input event that was part of a command."); | |
284f4730 | 5073 | |
7d6de002 | 5074 | DEFVAR_LISP ("last-nonmenu-event", &last_nonmenu_event, |
86e5706b | 5075 | "Last input event in a command, except for mouse menu events.\n\ |
7d6de002 RS |
5076 | Mouse menus give back keys that don't look like mouse events;\n\ |
5077 | this variable holds the actual mouse event that led to the menu,\n\ | |
5078 | so that you can determine whether the command was run by mouse or not."); | |
5079 | ||
284f4730 | 5080 | DEFVAR_LISP ("last-input-char", &last_input_char, |
86e5706b RS |
5081 | "Last input event."); |
5082 | ||
5083 | DEFVAR_LISP ("last-input-event", &last_input_char, | |
5084 | "Last input event."); | |
284f4730 | 5085 | |
dbc4e1c1 | 5086 | DEFVAR_LISP ("unread-command-events", &unread_command_events, |
1c07d0a6 | 5087 | "List of objects to be read as next command input events."); |
284f4730 | 5088 | |
86e5706b RS |
5089 | DEFVAR_INT ("unread-command-char", &unread_command_char, |
5090 | "If not -1, an object to be read as next command input event."); | |
5091 | ||
284f4730 JB |
5092 | DEFVAR_LISP ("meta-prefix-char", &meta_prefix_char, |
5093 | "Meta-prefix character code. Meta-foo as command input\n\ | |
5094 | turns into this character followed by foo."); | |
5095 | XSET (meta_prefix_char, Lisp_Int, 033); | |
5096 | ||
5097 | DEFVAR_LISP ("last-command", &last_command, | |
5098 | "The last command executed. Normally a symbol with a function definition,\n\ | |
5099 | but can be whatever was found in the keymap, or whatever the variable\n\ | |
5100 | `this-command' was set to by that command."); | |
5101 | last_command = Qnil; | |
5102 | ||
5103 | DEFVAR_LISP ("this-command", &this_command, | |
5104 | "The command now being executed.\n\ | |
5105 | The command can set this variable; whatever is put here\n\ | |
5106 | will be in `last-command' during the following command."); | |
5107 | this_command = Qnil; | |
5108 | ||
5109 | DEFVAR_INT ("auto-save-interval", &auto_save_interval, | |
5110 | "*Number of keyboard input characters between auto-saves.\n\ | |
5111 | Zero means disable autosaving due to number of characters typed."); | |
5112 | auto_save_interval = 300; | |
5113 | ||
5114 | DEFVAR_LISP ("auto-save-timeout", &Vauto_save_timeout, | |
5115 | "*Number of seconds idle time before auto-save.\n\ | |
06ef7355 RS |
5116 | Zero or nil means disable auto-saving due to idleness.\n\ |
5117 | After auto-saving due to this many seconds of idle time,\n\ | |
84447c71 | 5118 | Emacs also does a garbage collection if that seems to be warranted."); |
284f4730 JB |
5119 | XFASTINT (Vauto_save_timeout) = 30; |
5120 | ||
5121 | DEFVAR_INT ("echo-keystrokes", &echo_keystrokes, | |
5122 | "*Nonzero means echo unfinished commands after this many seconds of pause."); | |
5123 | echo_keystrokes = 1; | |
5124 | ||
5125 | DEFVAR_INT ("polling-period", &polling_period, | |
5126 | "*Interval between polling for input during Lisp execution.\n\ | |
5127 | The reason for polling is to make C-g work to stop a running program.\n\ | |
5128 | Polling is needed only when using X windows and SIGIO does not work.\n\ | |
5129 | Polling is automatically disabled in all other cases."); | |
5130 | polling_period = 2; | |
5131 | ||
564dc952 | 5132 | DEFVAR_LISP ("double-click-time", &Vdouble_click_time, |
fbcd35bd | 5133 | "*Maximum time between mouse clicks to make a double-click.\n\ |
564dc952 JB |
5134 | Measured in milliseconds. nil means disable double-click recognition;\n\ |
5135 | t means double-clicks have no time limit and are detected\n\ | |
fbcd35bd | 5136 | by position only."); |
aab06933 | 5137 | Vdouble_click_time = make_number (500); |
fbcd35bd | 5138 | |
284f4730 JB |
5139 | DEFVAR_INT ("num-input-keys", &num_input_keys, |
5140 | "*Number of complete keys read from the keyboard so far."); | |
5141 | num_input_keys = 0; | |
5142 | ||
07d2b8de | 5143 | #ifdef MULTI_FRAME |
ff11dfa1 | 5144 | DEFVAR_LISP ("last-event-frame", &Vlast_event_frame, |
fce33686 JB |
5145 | "*The frame in which the most recently read event occurred.\n\ |
5146 | If the last event came from a keyboard macro, this is set to `macro'."); | |
ff11dfa1 | 5147 | Vlast_event_frame = Qnil; |
07d2b8de | 5148 | #endif |
284f4730 | 5149 | |
7e85b935 | 5150 | DEFVAR_LISP ("help-char", &Vhelp_char, |
284f4730 JB |
5151 | "Character to recognize as meaning Help.\n\ |
5152 | When it is read, do `(eval help-form)', and display result if it's a string.\n\ | |
5153 | If the value of `help-form' is nil, this char can be read normally."); | |
7e85b935 | 5154 | XSET (Vhelp_char, Lisp_Int, Ctl ('H')); |
284f4730 JB |
5155 | |
5156 | DEFVAR_LISP ("help-form", &Vhelp_form, | |
7e85b935 | 5157 | "Form to execute when character `help-char' is read.\n\ |
284f4730 JB |
5158 | If the form returns a string, that string is displayed.\n\ |
5159 | If `help-form' is nil, the help char is not recognized."); | |
5160 | Vhelp_form = Qnil; | |
5161 | ||
7e85b935 RS |
5162 | DEFVAR_LISP ("prefix-help-command", &Vprefix_help_command, |
5163 | "Command to run when `help-char' character follows a prefix key.\n\ | |
5164 | This command is used only when there is no actual binding\n\ | |
5165 | for that character after that prefix key."); | |
5166 | Vprefix_help_command = Qnil; | |
5167 | ||
284f4730 JB |
5168 | DEFVAR_LISP ("top-level", &Vtop_level, |
5169 | "Form to evaluate when Emacs starts up.\n\ | |
5170 | Useful to set before you dump a modified Emacs."); | |
5171 | Vtop_level = Qnil; | |
5172 | ||
5173 | DEFVAR_LISP ("keyboard-translate-table", &Vkeyboard_translate_table, | |
5174 | "String used as translate table for keyboard input, or nil.\n\ | |
5175 | Each character is looked up in this string and the contents used instead.\n\ | |
5176 | If string is of length N, character codes N and up are untranslated."); | |
5177 | Vkeyboard_translate_table = Qnil; | |
5178 | ||
284f4730 | 5179 | DEFVAR_BOOL ("menu-prompting", &menu_prompting, |
7d6de002 | 5180 | "Non-nil means prompt with menus when appropriate.\n\ |
284f4730 | 5181 | This is done when reading from a keymap that has a prompt string,\n\ |
7d6de002 RS |
5182 | for elements that have prompt strings.\n\ |
5183 | The menu is displayed on the screen\n\ | |
5184 | if X menus were enabled at configuration\n\ | |
5185 | time and the previous event was a mouse click prefix key.\n\ | |
5186 | Otherwise, menu prompting uses the echo area."); | |
284f4730 JB |
5187 | menu_prompting = 1; |
5188 | ||
5189 | DEFVAR_LISP ("menu-prompt-more-char", &menu_prompt_more_char, | |
5190 | "Character to see next line of menu prompt.\n\ | |
5191 | Type this character while in a menu prompt to rotate around the lines of it."); | |
5192 | XSET (menu_prompt_more_char, Lisp_Int, ' '); | |
9fa4395d RS |
5193 | |
5194 | DEFVAR_INT ("extra-keyboard-modifiers", &extra_keyboard_modifiers, | |
5195 | "A mask of additional modifier keys to use with every keyboard character.\n\ | |
ad163903 JB |
5196 | Emacs applies the modifiers of the character stored here to each keyboard\n\ |
5197 | character it reads. For example, after evaluating the expression\n\ | |
80645119 JB |
5198 | (setq extra-keyboard-modifiers ?\C-x)\n\ |
5199 | all input characters will have the control modifier applied to them.\n\ | |
5200 | \n\ | |
5201 | Note that the character ?\C-@, equivalent to the integer zero, does\n\ | |
5202 | not count as a control character; rather, it counts as a character\n\ | |
5203 | with no modifiers; thus, setting extra_keyboard_modifiers to zero\n\ | |
5204 | cancels any modification."); | |
9fa4395d | 5205 | extra_keyboard_modifiers = 0; |
86e5706b RS |
5206 | |
5207 | DEFVAR_LISP ("deactivate-mark", &Vdeactivate_mark, | |
5208 | "If an editing command sets this to t, deactivate the mark afterward.\n\ | |
5209 | The command loop sets this to nil before each command,\n\ | |
5210 | and tests the value when the command returns.\n\ | |
5211 | Buffer modification stores t in this variable."); | |
5212 | Vdeactivate_mark = Qnil; | |
5213 | ||
5214 | DEFVAR_LISP ("pre-command-hook", &Vpre_command_hook, | |
5215 | "Normal hook run before each command is executed."); | |
5216 | Vpre_command_hook = Qnil; | |
5217 | ||
5218 | DEFVAR_LISP ("post-command-hook", &Vpost_command_hook, | |
7e85b935 | 5219 | "Normal hook run after each command is executed."); |
86e5706b | 5220 | Vpost_command_hook = Qnil; |
48e416d4 RS |
5221 | |
5222 | DEFVAR_LISP ("lucid-menu-bar-dirty-flag", &Vlucid_menu_bar_dirty_flag, | |
5223 | "t means menu bar, specified Lucid style, needs to be recomputed."); | |
5224 | Vlucid_menu_bar_dirty_flag = Qnil; | |
a73c5e29 RS |
5225 | |
5226 | DEFVAR_LISP ("help-menu-bar-map", &Vhelp_menu_bar_map, | |
5227 | "Keymap defining global menu items to appear at end of menu bar."); | |
5228 | Vhelp_menu_bar_map = Qnil; | |
284f4730 JB |
5229 | } |
5230 | ||
5231 | keys_of_keyboard () | |
5232 | { | |
5233 | initial_define_key (global_map, Ctl ('Z'), "suspend-emacs"); | |
5234 | initial_define_key (control_x_map, Ctl ('Z'), "suspend-emacs"); | |
5235 | initial_define_key (meta_map, Ctl ('C'), "exit-recursive-edit"); | |
5236 | initial_define_key (global_map, Ctl (']'), "abort-recursive-edit"); | |
5237 | initial_define_key (meta_map, 'x', "execute-extended-command"); | |
5238 | } |