1 /* Keyboard and mouse input; editor command loop.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
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.
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. */
20 /* Allow config.h to undefine symbols found here. */
29 #include "termhooks.h"
36 #include "dispextern.h"
38 #include "intervals.h"
39 #include "blockinput.h"
48 #include <sys/ioctl.h>
50 #endif /* not MSDOS */
52 #include "syssignal.h"
58 /* Variables for blockinput.h: */
60 /* Non-zero if interrupt input is blocked right now. */
61 int interrupt_input_blocked
;
63 /* Nonzero means an input interrupt has arrived
64 during the current critical section. */
65 int interrupt_input_pending
;
69 extern Lisp_Object Vmouse_grabbed
;
71 /* Make all keyboard buffers much bigger when using X windows. */
72 #define KBD_BUFFER_SIZE 4096
73 #else /* No X-windows, character input */
74 #define KBD_BUFFER_SIZE 256
75 #endif /* No X-windows */
77 /* Following definition copied from eval.c */
81 struct backtrace
*next
;
82 Lisp_Object
*function
;
83 Lisp_Object
*args
; /* Points to vector of args. */
84 int nargs
; /* length of vector. If nargs is UNEVALLED,
85 args points to slot holding list of
90 /* Non-nil disable property on a command means
91 do not execute it; call disabled-command-hook's value instead. */
92 Lisp_Object Qdisabled
, Qdisabled_command_hook
;
94 #define NUM_RECENT_KEYS (100)
95 int recent_keys_index
; /* Index for storing next element into recent_keys */
96 int total_keys
; /* Total number of elements stored into recent_keys */
97 Lisp_Object recent_keys
; /* A vector, holding the last 100 keystrokes */
99 /* Vector holding the key sequence that invoked the current command.
100 It is reused for each command, and it may be longer than the current
101 sequence; this_command_key_count indicates how many elements
102 actually mean something.
103 It's easier to staticpro a single Lisp_Object than an array. */
104 Lisp_Object this_command_keys
;
105 int this_command_key_count
;
107 extern int minbuf_level
;
109 extern struct backtrace
*backtrace_list
;
111 /* Nonzero means do menu prompting. */
112 static int menu_prompting
;
114 /* Character to see next line of menu prompt. */
115 static Lisp_Object menu_prompt_more_char
;
117 /* For longjmp to where kbd input is being done. */
118 static jmp_buf getcjmp
;
120 /* True while doing kbd input. */
121 int waiting_for_input
;
123 /* True while displaying for echoing. Delays C-g throwing. */
126 /* Nonzero means C-g should cause immediate error-signal. */
129 /* Character to recognize as the help char. */
130 Lisp_Object Vhelp_char
;
132 /* Form to execute when help char is typed. */
133 Lisp_Object Vhelp_form
;
135 /* Command to run when the help character follows a prefix key. */
136 Lisp_Object Vprefix_help_command
;
138 /* List of items that should move to the end of the menu bar. */
139 Lisp_Object Vmenu_bar_final_items
;
141 /* Character that causes a quit. Normally C-g.
143 If we are running on an ordinary terminal, this must be an ordinary
144 ASCII char, since we want to make it our interrupt character.
146 If we are not running on an ordinary terminal, it still needs to be
147 an ordinary ASCII char. This character needs to be recognized in
148 the input interrupt handler. At this point, the keystroke is
149 represented as a struct input_event, while the desired quit
150 character is specified as a lispy event. The mapping from struct
151 input_events to lispy events cannot run in an interrupt handler,
152 and the reverse mapping is difficult for anything but ASCII
155 FOR THESE ELABORATE AND UNSATISFYING REASONS, quit_char must be an
159 extern Lisp_Object current_global_map
;
160 extern int minibuf_level
;
162 /* If non-nil, this is a map that overrides all other local maps. */
163 Lisp_Object Voverriding_local_map
;
165 /* Current depth in recursive edits. */
166 int command_loop_level
;
168 /* Total number of times command_loop has read a key sequence. */
171 /* Last input character read as a command. */
172 Lisp_Object last_command_char
;
174 /* Last input character read as a command, not counting menus
175 reached by the mouse. */
176 Lisp_Object last_nonmenu_event
;
178 /* Last input character read for any purpose. */
179 Lisp_Object last_input_char
;
181 /* If not Qnil, a list of objects to be read as subsequent command input. */
182 Lisp_Object unread_command_events
;
184 /* If not -1, an event to be read as subsequent command input. */
185 int unread_command_char
;
187 /* If not Qnil, this is a switch-frame event which we decided to put
188 off until the end of a key sequence. This should be read as the
189 next command input, after any unread_command_events.
191 read_key_sequence uses this to delay switch-frame events until the
192 end of the key sequence; Fread_char uses it to put off switch-frame
193 events until a non-ASCII event is acceptable as input. */
194 Lisp_Object unread_switch_frame
;
196 /* A mask of extra modifier bits to put into every keyboard char. */
197 int extra_keyboard_modifiers
;
199 /* Char to use as prefix when a meta character is typed in.
200 This is bound on entry to minibuffer in case ESC is changed there. */
202 Lisp_Object meta_prefix_char
;
204 /* Last size recorded for a current buffer which is not a minibuffer. */
205 static int last_non_minibuf_size
;
207 /* Number of idle seconds before an auto-save and garbage collection. */
208 static Lisp_Object Vauto_save_timeout
;
210 /* Total number of times read_char has returned. */
213 /* Total number of times read_char has returned, outside of macros. */
214 int num_nonmacro_input_chars
;
216 /* Auto-save automatically when this many characters have been typed
217 since the last time. */
219 static int auto_save_interval
;
221 /* Value of num_nonmacro_input_chars as of last auto save. */
225 /* Last command executed by the editor command loop, not counting
226 commands that set the prefix argument. */
228 Lisp_Object last_command
;
230 /* The command being executed by the command loop.
231 Commands may set this, and the value set will be copied into last_command
232 instead of the actual command. */
233 Lisp_Object this_command
;
236 /* The frame in which the last input event occurred, or Qmacro if the
237 last event came from a macro. We use this to determine when to
238 generate switch-frame events. This may be cleared by functions
239 like Fselect_frame, to make sure that a switch-frame event is
240 generated by the next character. */
241 Lisp_Object internal_last_event_frame
;
243 /* A user-visible version of the above, intended to allow users to
244 figure out where the last event came from, if the event doesn't
245 carry that information itself (i.e. if it was a character). */
246 Lisp_Object Vlast_event_frame
;
249 /* The timestamp of the last input event we received from the X server.
250 X Windows wants this for selection ownership. */
251 unsigned long last_event_timestamp
;
253 Lisp_Object Qself_insert_command
;
254 Lisp_Object Qforward_char
;
255 Lisp_Object Qbackward_char
;
256 Lisp_Object Qundefined
;
258 /* read_key_sequence stores here the command definition of the
259 key sequence that it reads. */
260 Lisp_Object read_key_sequence_cmd
;
262 /* Form to evaluate (if non-nil) when Emacs is started. */
263 Lisp_Object Vtop_level
;
265 /* User-supplied string to translate input characters through. */
266 Lisp_Object Vkeyboard_translate_table
;
268 /* Keymap mapping ASCII function key sequences onto their preferred forms. */
269 extern Lisp_Object Vfunction_key_map
;
271 /* Keymap mapping ASCII function key sequences onto their preferred forms. */
272 Lisp_Object Vkey_translation_map
;
274 /* Non-nil means deactivate the mark at end of this command. */
275 Lisp_Object Vdeactivate_mark
;
277 /* Menu bar specified in Lucid Emacs fashion. */
279 Lisp_Object Vlucid_menu_bar_dirty_flag
;
280 Lisp_Object Qrecompute_lucid_menubar
, Qactivate_menubar_hook
;
282 /* Hooks to run before and after each command. */
283 Lisp_Object Qpre_command_hook
, Qpost_command_hook
;
284 Lisp_Object Vpre_command_hook
, Vpost_command_hook
;
285 Lisp_Object Qcommand_hook_internal
, Vcommand_hook_internal
;
287 /* File in which we write all commands we read. */
290 /* Nonzero if input is available. */
293 /* 1 if should obey 0200 bit in input chars as "Meta", 2 if should
294 keep 0200 bit in input chars. 0 to ignore the 0200 bit. */
298 extern char *pending_malloc_warning
;
300 /* Circular buffer for pre-read keyboard input. */
301 static struct input_event kbd_buffer
[KBD_BUFFER_SIZE
];
303 /* Vector to GCPRO the frames and windows mentioned in kbd_buffer.
305 The interrupt-level event handlers will never enqueue an event on a
306 frame which is not in Vframe_list, and once an event is dequeued,
307 internal_last_event_frame or the event itself points to the frame.
310 But while the event is sitting in the queue, it's completely
311 unprotected. Suppose the user types one command which will run for
312 a while and then delete a frame, and then types another event at
313 the frame that will be deleted, before the command gets around to
314 it. Suppose there are no references to this frame elsewhere in
315 Emacs, and a GC occurs before the second event is dequeued. Now we
316 have an event referring to a freed frame, which will crash Emacs
319 Similar things happen when an event on a scroll bar is enqueued; the
320 window may be deleted while the event is in the queue.
322 So, we use this vector to protect the frame_or_window field in the
323 event queue. That way, they'll be dequeued as dead frames or
324 windows, but still valid lisp objects.
326 If kbd_buffer[i].kind != no_event, then
327 (XVECTOR (kbd_buffer_frame_or_window)->contents[i]
328 == kbd_buffer[i].frame_or_window. */
329 static Lisp_Object kbd_buffer_frame_or_window
;
331 /* Pointer to next available character in kbd_buffer.
332 If kbd_fetch_ptr == kbd_store_ptr, the buffer is empty.
333 This may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the the
334 next available char is in kbd_buffer[0]. */
335 static struct input_event
*kbd_fetch_ptr
;
337 /* Pointer to next place to store character in kbd_buffer. This
338 may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the next
339 character should go in kbd_buffer[0]. */
343 static struct input_event
*kbd_store_ptr
;
345 /* The above pair of variables forms a "queue empty" flag. When we
346 enqueue a non-hook event, we increment kbd_write_count. When we
347 dequeue a non-hook event, we increment kbd_read_count. We say that
348 there is input available iff the two counters are not equal.
350 Why not just have a flag set and cleared by the enqueuing and
351 dequeuing functions? Such a flag could be screwed up by interrupts
352 at inopportune times. */
354 /* If this flag is non-zero, we check mouse_moved to see when the
355 mouse moves, and motion events will appear in the input stream. If
356 it is zero, mouse motion is ignored. */
357 static int do_mouse_tracking
;
359 /* The window system handling code should set this if the mouse has
360 moved since the last call to the mouse_position_hook. Calling that
361 hook should clear this. Code assumes that if this is set, it can
362 call mouse_position_hook to get the promised position, so don't set
363 it unless you're prepared to substantiate the claim! */
366 /* True iff there is an event in kbd_buffer, or if mouse tracking is
367 enabled and there is a new mouse position in the mouse movement
368 buffer. Note that if this is false, that doesn't mean that there
369 is readable input; all the events in the queue might be button-up
370 events, and do_mouse_tracking might be off. */
371 #define EVENT_QUEUES_EMPTY \
372 ((kbd_fetch_ptr == kbd_store_ptr) && (!do_mouse_tracking || !mouse_moved))
375 /* Symbols to head events. */
376 Lisp_Object Qmouse_movement
;
377 Lisp_Object Qscroll_bar_movement
;
378 Lisp_Object Qswitch_frame
;
380 /* Symbols to denote kinds of events. */
381 Lisp_Object Qfunction_key
;
382 Lisp_Object Qmouse_click
;
383 /* Lisp_Object Qmouse_movement; - also an event header */
385 /* Properties of event headers. */
386 Lisp_Object Qevent_kind
;
387 Lisp_Object Qevent_symbol_elements
;
389 Lisp_Object Qmenu_enable
;
391 /* An event header symbol HEAD may have a property named
392 Qevent_symbol_element_mask, which is of the form (BASE MODIFIERS);
393 BASE is the base, unmodified version of HEAD, and MODIFIERS is the
394 mask of modifiers applied to it. If present, this is used to help
395 speed up parse_modifiers. */
396 Lisp_Object Qevent_symbol_element_mask
;
398 /* An unmodified event header BASE may have a property named
399 Qmodifier_cache, which is an alist mapping modifier masks onto
400 modified versions of BASE. If present, this helps speed up
402 Lisp_Object Qmodifier_cache
;
404 /* Symbols to use for parts of windows. */
405 Lisp_Object Qmode_line
;
406 Lisp_Object Qvertical_line
;
407 Lisp_Object Qvertical_scroll_bar
;
408 Lisp_Object Qmenu_bar
;
410 extern Lisp_Object Qmenu_enable
;
412 Lisp_Object
recursive_edit_unwind (), command_loop ();
413 Lisp_Object
Fthis_command_keys ();
414 Lisp_Object Qextended_command_history
;
416 /* Address (if not 0) of EMACS_TIME to zero out if a SIGIO interrupt
418 EMACS_TIME
*input_available_clear_time
;
420 /* Nonzero means use SIGIO interrupts; zero means use CBREAK mode.
421 Default is 1 if INTERRUPT_INPUT is defined. */
424 /* Nonzero while interrupts are temporarily deferred during redisplay. */
425 int interrupts_deferred
;
427 /* nonzero means use ^S/^Q for flow control. */
430 /* Allow m- file to inhibit use of FIONREAD. */
431 #ifdef BROKEN_FIONREAD
435 /* We are unable to use interrupts if FIONREAD is not available,
436 so flush SIGIO so we won't try. */
443 /* If we support X Windows, turn on the code to poll periodically
444 to detect C-g. It isn't actually used when doing interrupt input. */
445 #ifdef HAVE_X_WINDOWS
446 #define POLL_FOR_INPUT
449 /* Global variable declarations. */
451 /* Function for init_keyboard to call with no args (if nonzero). */
452 void (*keyboard_init_hook
) ();
454 static int read_avail_input ();
455 static void get_input_pending ();
456 static int readable_events ();
457 static Lisp_Object
read_char_x_menu_prompt ();
458 static Lisp_Object
read_char_minibuf_menu_prompt ();
459 static Lisp_Object
make_lispy_event ();
460 static Lisp_Object
make_lispy_movement ();
461 static Lisp_Object
modify_event_symbol ();
462 static Lisp_Object
make_lispy_switch_frame ();
464 /* > 0 if we are to echo keystrokes. */
465 static int echo_keystrokes
;
467 /* Nonzero means echo each character as typed. */
468 static int immediate_echo
;
470 /* The text we're echoing in the modeline - partial key sequences,
471 usually. '\0'-terminated. This really shouldn't have a fixed size. */
472 static char echobuf
[300];
474 /* Where to append more text to echobuf if we want to. */
475 static char *echoptr
;
477 #define min(a,b) ((a)<(b)?(a):(b))
478 #define max(a,b) ((a)>(b)?(a):(b))
480 /* Install the string STR as the beginning of the string of echoing,
481 so that it serves as a prompt for the next character.
482 Also start echoing. */
487 int len
= strlen (str
);
488 if (len
> sizeof echobuf
- 4)
489 len
= sizeof echobuf
- 4;
490 bcopy (str
, echobuf
, len
);
491 echoptr
= echobuf
+ len
;
497 /* Add C to the echo string, if echoing is going on.
498 C can be a character, which is printed prettily ("M-C-x" and all that
499 jazz), or a symbol, whose name is printed. */
504 extern char *push_key_description ();
513 /* If someone has passed us a composite event, use its head symbol. */
516 if (XTYPE (c
) == Lisp_Int
)
518 if (ptr
- echobuf
> sizeof echobuf
- 6)
521 ptr
= push_key_description (XINT (c
), ptr
);
523 else if (XTYPE (c
) == Lisp_Symbol
)
525 struct Lisp_String
*name
= XSYMBOL (c
)->name
;
526 if (((ptr
- echobuf
) + name
->size
+ 4) > sizeof echobuf
)
528 bcopy (name
->data
, ptr
, name
->size
);
532 if (echoptr
== echobuf
&& EQ (c
, Vhelp_char
))
534 strcpy (ptr
, " (Type ? for further options)");
545 /* Temporarily add a dash to the end of the echo string if it's not
546 empty, so that it serves as a mini-prompt for the very next character. */
550 if (!immediate_echo
&& echoptr
== echobuf
)
552 /* Do nothing if not echoing at all. */
556 /* Put a dash at the end of the buffer temporarily,
557 but make it go away when the next character is added. */
564 /* Display the current echo string, and begin echoing if not already
574 for (i
= 0; i
< this_command_key_count
; i
++)
575 echo_char (XVECTOR (this_command_keys
)->contents
[i
]);
583 if (waiting_for_input
&& !NILP (Vquit_flag
))
584 quit_throw_to_read_char ();
587 /* Turn off echoing, for the start of a new command. */
595 /* Return the length of the current echo string. */
600 return echoptr
- echobuf
;
603 /* Truncate the current echo message to its first LEN chars.
604 This and echo_char get used by read_key_sequence when the user
605 switches frames while entering a key sequence. */
612 echoptr
= echobuf
+ len
;
613 truncate_echo_area (len
);
617 /* Functions for manipulating this_command_keys. */
619 add_command_key (key
)
622 int size
= XVECTOR (this_command_keys
)->size
;
624 if (this_command_key_count
>= size
)
626 Lisp_Object new_keys
= Fmake_vector (make_number (size
* 2), Qnil
);
628 bcopy (XVECTOR (this_command_keys
)->contents
,
629 XVECTOR (new_keys
)->contents
,
630 size
* sizeof (Lisp_Object
));
632 this_command_keys
= new_keys
;
635 XVECTOR (this_command_keys
)->contents
[this_command_key_count
++] = key
;
641 int count
= specpdl_ptr
- specpdl
;
644 if (command_loop_level
> 0)
646 specbind (Qstandard_output
, Qt
);
647 specbind (Qstandard_input
, Qt
);
650 val
= command_loop ();
652 Fsignal (Qquit
, Qnil
);
654 return unbind_to (count
, Qnil
);
657 /* When an auto-save happens, record the "time", and don't do again soon. */
660 last_auto_save
= num_nonmacro_input_chars
;
663 DEFUN ("recursive-edit", Frecursive_edit
, Srecursive_edit
, 0, 0, "",
664 "Invoke the editor command loop recursively.\n\
665 To get out of the recursive edit, a command can do `(throw 'exit nil)';\n\
666 that tells this function to return.\n\
667 Alternately, `(throw 'exit t)' makes this function signal an error.\n\
668 This function is called by the editor initialization to begin editing.")
671 int count
= specpdl_ptr
- specpdl
;
674 command_loop_level
++;
675 update_mode_lines
= 1;
677 record_unwind_protect (recursive_edit_unwind
,
679 && current_buffer
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
683 return unbind_to (count
, Qnil
);
687 recursive_edit_unwind (buffer
)
691 Fset_buffer (buffer
);
693 command_loop_level
--;
694 update_mode_lines
= 1;
702 Lisp_Object errmsg
, tail
, errname
, file_error
;
709 Vstandard_output
= Qt
;
710 Vstandard_input
= Qt
;
711 Vexecuting_macro
= Qnil
;
712 echo_area_glyphs
= 0;
714 /* If the window system or terminal frame hasn't been initialized
715 yet, or we're not interactive, it's best to dump this message out
716 to stderr and exit. */
717 if (! FRAME_MESSAGE_BUF (selected_frame
)
719 stream
= Qexternal_debugging_output
;
727 errname
= Fcar (data
);
729 if (EQ (errname
, Qerror
))
732 if (!CONSP (data
)) data
= Qnil
;
733 errmsg
= Fcar (data
);
738 errmsg
= Fget (errname
, Qerror_message
);
739 file_error
= Fmemq (Qfile_error
,
740 Fget (errname
, Qerror_conditions
));
743 /* Print an error message including the data items.
744 This is done by printing it into a scratch buffer
745 and then making a copy of the text in the buffer. */
747 if (!CONSP (data
)) data
= Qnil
;
751 /* For file-error, make error message by concatenating
752 all the data items. They are all strings. */
753 if (!NILP (file_error
) && !NILP (tail
))
754 errmsg
= XCONS (tail
)->car
, tail
= XCONS (tail
)->cdr
;
756 if (XTYPE (errmsg
) == Lisp_String
)
757 Fprinc (errmsg
, stream
);
759 write_string_1 ("peculiar error", -1, stream
);
761 for (i
= 0; CONSP (tail
); tail
= Fcdr (tail
), i
++)
763 write_string_1 (i
? ", " : ": ", 2, stream
);
764 if (!NILP (file_error
))
765 Fprinc (Fcar (tail
), stream
);
767 Fprin1 (Fcar (tail
), stream
);
771 /* If the window system or terminal frame hasn't been initialized
772 yet, or we're in -batch mode, this error should cause Emacs to exit. */
773 if (! FRAME_MESSAGE_BUF (selected_frame
)
777 Fkill_emacs (make_number (-1));
782 Vinhibit_quit
= Qnil
;
783 return make_number (0);
786 Lisp_Object
command_loop_1 ();
787 Lisp_Object
command_loop_2 ();
788 Lisp_Object
top_level_1 ();
790 /* Entry to editor-command-loop.
791 This level has the catches for exiting/returning to editor command loop.
792 It returns nil to exit recursive edit, t to abort it. */
797 if (command_loop_level
> 0 || minibuf_level
> 0)
799 return internal_catch (Qexit
, command_loop_2
, Qnil
);
804 internal_catch (Qtop_level
, top_level_1
, Qnil
);
805 internal_catch (Qtop_level
, command_loop_2
, Qnil
);
807 /* End of file in -batch run causes exit here. */
813 /* Here we catch errors in execution of commands within the
814 editing loop, and reenter the editing loop.
815 When there is an error, cmd_error runs and returns a non-nil
816 value to us. A value of nil means that cmd_loop_1 itself
817 returned due to end of file (or end of kbd macro). */
822 register Lisp_Object val
;
825 val
= internal_condition_case (command_loop_1
, Qerror
, cmd_error
);
834 return Feval (Vtop_level
);
840 /* On entry to the outer level, run the startup file */
841 if (!NILP (Vtop_level
))
842 internal_condition_case (top_level_2
, Qerror
, cmd_error
);
843 else if (!NILP (Vpurify_flag
))
844 message ("Bare impure Emacs (standard Lisp code not loaded)");
846 message ("Bare Emacs (standard Lisp code not loaded)");
850 DEFUN ("top-level", Ftop_level
, Stop_level
, 0, 0, "",
851 "Exit all recursive editing levels.")
854 Fthrow (Qtop_level
, Qnil
);
857 DEFUN ("exit-recursive-edit", Fexit_recursive_edit
, Sexit_recursive_edit
, 0, 0, "",
858 "Exit from the innermost recursive edit or minibuffer.")
861 if (command_loop_level
> 0 || minibuf_level
> 0)
862 Fthrow (Qexit
, Qnil
);
864 error ("No recursive edit is in progress");
867 DEFUN ("abort-recursive-edit", Fabort_recursive_edit
, Sabort_recursive_edit
, 0, 0, "",
868 "Abort the command that requested this recursive edit or minibuffer input.")
871 if (command_loop_level
> 0 || minibuf_level
> 0)
874 error ("No recursive edit is in progress");
877 /* This is the actual command reading loop,
878 sans error-handling encapsulation. */
880 Lisp_Object
Fcommand_execute ();
881 static int read_key_sequence ();
886 Lisp_Object cmd
, tem
;
889 Lisp_Object keybuf
[30];
894 struct buffer
*prev_buffer
;
897 Vdeactivate_mark
= Qnil
;
898 waiting_for_input
= 0;
901 /* Don't clear out last_command at the beginning of a macro. */
902 if (XTYPE (Vexecuting_macro
) != Lisp_String
)
907 this_command_key_count
= 0;
909 /* Make sure this hook runs after commands that get errors and
910 throw to top level. */
911 if (!NILP (Vpost_command_hook
))
913 /* If we get an error during the post-command-hook,
914 cause post-command-hook to be nil. */
915 Vcommand_hook_internal
= Vpost_command_hook
;
916 Vpost_command_hook
= Qnil
;
918 call1 (Vrun_hooks
, Qcommand_hook_internal
);
920 Vpost_command_hook
= Vcommand_hook_internal
;
925 /* Install chars successfully executed in kbd macro. */
927 if (defining_kbd_macro
&& NILP (Vprefix_arg
))
928 finalize_kbd_macro_chars ();
930 /* Make sure the current window's buffer is selected. */
931 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
932 set_buffer_internal (XBUFFER (XWINDOW (selected_window
)->buffer
));
934 /* Display any malloc warning that just came out. Use while because
935 displaying one warning can cause another. */
937 while (pending_malloc_warning
)
938 display_malloc_warning ();
942 Vdeactivate_mark
= Qnil
;
944 /* If minibuffer on and echo area in use,
945 wait 2 sec and redraw minibuffer. */
947 if (minibuf_level
&& echo_area_glyphs
)
949 /* Bind inhibit-quit to t so that C-g gets read in
950 rather than quitting back to the minibuffer. */
951 int count
= specpdl_ptr
- specpdl
;
952 specbind (Qinhibit_quit
, Qt
);
953 Fsit_for (make_number (2), Qnil
, Qnil
);
954 unbind_to (count
, Qnil
);
956 echo_area_glyphs
= 0;
958 if (!NILP (Vquit_flag
))
961 unread_command_events
= Fcons (make_number (quit_char
), Qnil
);
966 alloca (0); /* Cause a garbage collection now */
967 /* Since we can free the most stuff here. */
968 #endif /* C_ALLOCA */
972 /* Select the frame that the last event came from. Usually,
973 switch-frame events will take care of this, but if some lisp
974 code swallows a switch-frame event, we'll fix things up here.
975 Is this a good idea? */
976 if (XTYPE (internal_last_event_frame
) == Lisp_Frame
977 && XFRAME (internal_last_event_frame
) != selected_frame
)
978 Fselect_frame (internal_last_event_frame
, Qnil
);
981 /* If it has changed current-menubar from previous value,
982 really recompute the menubar from the value. */
983 if (! NILP (Vlucid_menu_bar_dirty_flag
)
984 && !NILP (Ffboundp (Qrecompute_lucid_menubar
)))
985 call0 (Qrecompute_lucid_menubar
);
987 #if 0 /* This is done in xdisp.c now. */
989 for (tem
= Vframe_list
; CONSP (tem
); tem
= XCONS (tem
)->cdr
)
991 struct frame
*f
= XFRAME (XCONS (tem
)->car
);
992 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
994 /* If the user has switched buffers or windows, we need to
995 recompute to reflect the new bindings. But we'll
996 recompute when update_mode_lines is set too; that means
997 that people can use force-mode-line-update to request
998 that the menu bar be recomputed. The adverse effect on
999 the rest of the redisplay algorithm is about the same as
1000 windows_or_buffers_changed anyway. */
1001 if (windows_or_buffers_changed
1002 || update_mode_lines
1003 || (XFASTINT (w
->last_modified
) < MODIFF
1004 && (XFASTINT (w
->last_modified
)
1005 <= XBUFFER (w
->buffer
)->save_modified
)))
1007 struct buffer
*prev
= current_buffer
;
1008 current_buffer
= XBUFFER (w
->buffer
);
1009 FRAME_MENU_BAR_ITEMS (f
) = menu_bar_items ();
1010 current_buffer
= prev
;
1013 #endif /* MULTI_FRAME */
1016 /* Read next key sequence; i gets its length. */
1017 i
= read_key_sequence (keybuf
, (sizeof keybuf
/ sizeof (keybuf
[0])), Qnil
);
1021 /* Now we have read a key sequence of length I,
1022 or else I is 0 and we found end of file. */
1024 if (i
== 0) /* End of file -- happens only in */
1025 return Qnil
; /* a kbd macro, at the end. */
1026 /* -1 means read_key_sequence got a menu that was rejected.
1027 Just loop around and read another command. */
1031 this_command_key_count
= 0;
1035 last_command_char
= keybuf
[i
- 1];
1037 /* If the previous command tried to force a specific window-start,
1038 forget about that, in case this command moves point far away
1039 from that position. */
1040 XWINDOW (selected_window
)->force_start
= Qnil
;
1042 cmd
= read_key_sequence_cmd
;
1043 if (!NILP (Vexecuting_macro
))
1045 if (!NILP (Vquit_flag
))
1047 Vexecuting_macro
= Qt
;
1048 QUIT
; /* Make some noise. */
1049 /* Will return since macro now empty. */
1053 /* Do redisplay processing after this command except in special
1054 cases identified below that set no_redisplay to 1.
1055 (actually, there's currently no way to prevent the redisplay,
1056 and no_redisplay is ignored.
1057 Perhaps someday we will really implement it. */
1060 prev_buffer
= current_buffer
;
1061 prev_modiff
= MODIFF
;
1063 /* Execute the command. */
1066 if (!NILP (Vpre_command_hook
))
1068 /* If we get an error during the pre-command-hook,
1069 cause pre-command-hook to be nil. */
1070 Vcommand_hook_internal
= Vpre_command_hook
;
1071 Vpre_command_hook
= Qnil
;
1073 call1 (Vrun_hooks
, Qcommand_hook_internal
);
1075 Vpre_command_hook
= Vcommand_hook_internal
;
1078 if (NILP (this_command
))
1080 /* nil means key is undefined. */
1082 defining_kbd_macro
= 0;
1083 update_mode_lines
= 1;
1089 if (NILP (Vprefix_arg
) && ! no_direct
)
1091 /* Recognize some common commands in common situations and
1092 do them directly. */
1093 if (EQ (this_command
, Qforward_char
) && point
< ZV
)
1095 struct Lisp_Vector
*dp
1096 = window_display_table (XWINDOW (selected_window
));
1097 lose
= FETCH_CHAR (point
);
1100 ? (VECTORP (DISP_CHAR_VECTOR (dp
, lose
))
1101 && XVECTOR (DISP_CHAR_VECTOR (dp
, lose
))->size
== 1)
1102 : (lose
>= 0x20 && lose
< 0x7f))
1103 && (XFASTINT (XWINDOW (selected_window
)->last_modified
)
1105 && (XFASTINT (XWINDOW (selected_window
)->last_point
)
1107 && !windows_or_buffers_changed
1108 && EQ (current_buffer
->selective_display
, Qnil
)
1109 && !detect_input_pending ()
1110 && NILP (Vexecuting_macro
))
1111 no_redisplay
= direct_output_forward_char (1);
1114 else if (EQ (this_command
, Qbackward_char
) && point
> BEGV
)
1116 struct Lisp_Vector
*dp
1117 = window_display_table (XWINDOW (selected_window
));
1119 lose
= FETCH_CHAR (point
);
1121 ? (XTYPE (DISP_CHAR_VECTOR (dp
, lose
)) != Lisp_Vector
1122 && XVECTOR (DISP_CHAR_VECTOR (dp
, lose
))->size
== 1)
1123 : (lose
>= 0x20 && lose
< 0x7f))
1124 && (XFASTINT (XWINDOW (selected_window
)->last_modified
)
1126 && (XFASTINT (XWINDOW (selected_window
)->last_point
)
1128 && !windows_or_buffers_changed
1129 && EQ (current_buffer
->selective_display
, Qnil
)
1130 && !detect_input_pending ()
1131 && NILP (Vexecuting_macro
))
1132 no_redisplay
= direct_output_forward_char (-1);
1135 else if (EQ (this_command
, Qself_insert_command
)
1136 /* Try this optimization only on ascii keystrokes. */
1137 && XTYPE (last_command_char
) == Lisp_Int
)
1139 unsigned char c
= XINT (last_command_char
);
1141 if (NILP (Vexecuting_macro
) &&
1142 !EQ (minibuf_window
, selected_window
))
1144 if (!nonundocount
|| nonundocount
>= 20)
1151 lose
= (XFASTINT (XWINDOW (selected_window
)->last_modified
)
1153 || (XFASTINT (XWINDOW (selected_window
)->last_point
)
1155 || MODIFF
<= current_buffer
->save_modified
1156 || windows_or_buffers_changed
1157 || !EQ (current_buffer
->selective_display
, Qnil
)
1158 || detect_input_pending ()
1159 || !NILP (Vexecuting_macro
);
1160 if (internal_self_insert (c
, 0))
1166 (point
== ZV
|| FETCH_CHAR (point
) == '\n'))
1168 struct Lisp_Vector
*dp
1169 = window_display_table (XWINDOW (selected_window
));
1174 Lisp_Object obj
= DISP_CHAR_VECTOR (dp
, lose
);
1176 if (XTYPE (obj
) == Lisp_Vector
1177 && XVECTOR (obj
)->size
== 1
1178 && (XTYPE (obj
= XVECTOR (obj
)->contents
[0])
1181 direct_output_for_insert (XINT (obj
));
1185 if (lose
>= 0x20 && lose
<= 0x7e)
1186 no_redisplay
= direct_output_for_insert (lose
);
1193 /* Here for a command that isn't executed directly */
1196 if (NILP (Vprefix_arg
))
1198 Fcommand_execute (this_command
, Qnil
);
1203 if (!NILP (Vpost_command_hook
))
1204 call1 (Vrun_hooks
, Qpost_command_hook
);
1206 /* If there is a prefix argument,
1207 1) We don't want last_command to be ``universal-argument''
1208 (that would be dumb), so don't set last_command,
1209 2) we want to leave echoing on so that the prefix will be
1210 echoed as part of this key sequence, so don't call
1212 3) we want to leave this_command_key_count non-zero, so that
1213 read_char will realize that it is re-reading a character, and
1214 not echo it a second time. */
1215 if (NILP (Vprefix_arg
))
1217 last_command
= this_command
;
1219 this_command_key_count
= 0;
1222 if (!NILP (current_buffer
->mark_active
))
1224 if (!NILP (Vdeactivate_mark
) && !NILP (Vtransient_mark_mode
))
1226 current_buffer
->mark_active
= Qnil
;
1227 call1 (Vrun_hooks
, intern ("deactivate-mark-hook"));
1229 else if (current_buffer
!= prev_buffer
|| MODIFF
!= prev_modiff
)
1230 call1 (Vrun_hooks
, intern ("activate-mark-hook"));
1235 /* Number of seconds between polling for input. */
1238 /* Nonzero means polling for input is temporarily suppressed. */
1239 int poll_suppress_count
;
1241 #ifdef POLL_FOR_INPUT
1242 int polling_for_input
;
1244 /* Handle an alarm once each second and read pending input
1245 so as to handle a C-g if it comces in. */
1248 input_poll_signal ()
1250 if (interrupt_input_blocked
== 0
1251 && !waiting_for_input
)
1252 read_avail_input (0);
1253 signal (SIGALRM
, input_poll_signal
);
1254 alarm (polling_period
);
1259 /* Begin signals to poll for input, if they are appropriate.
1260 This function is called unconditionally from various places. */
1264 #ifdef POLL_FOR_INPUT
1265 if (read_socket_hook
&& !interrupt_input
)
1267 poll_suppress_count
--;
1268 if (poll_suppress_count
== 0)
1270 signal (SIGALRM
, input_poll_signal
);
1271 polling_for_input
= 1;
1272 alarm (polling_period
);
1278 /* Turn off polling. */
1282 #ifdef POLL_FOR_INPUT
1283 if (read_socket_hook
&& !interrupt_input
)
1285 if (poll_suppress_count
== 0)
1287 polling_for_input
= 0;
1290 poll_suppress_count
++;
1295 /* Set the value of poll_suppress_count to COUNT
1296 and start or stop polling accordingly. */
1299 set_poll_suppress_count (count
)
1302 #ifdef POLL_FOR_INPUT
1303 if (count
== 0 && poll_suppress_count
!= 0)
1305 poll_suppress_count
= 1;
1308 else if (count
!= 0 && poll_suppress_count
== 0)
1312 poll_suppress_count
= count
;
1316 /* Applying the control modifier to CHARACTER. */
1321 /* Save the upper bits here. */
1322 int upper
= c
& ~0177;
1326 /* Everything in the columns containing the upper-case letters
1327 denotes a control character. */
1328 if (c
>= 0100 && c
< 0140)
1332 /* Set the shift modifier for a control char
1333 made from a shifted letter. But only for letters! */
1334 if (oc
>= 'A' && oc
<= 'Z')
1335 c
|= shift_modifier
;
1338 /* The lower-case letters denote control characters too. */
1339 else if (c
>= 'a' && c
<= 'z')
1342 /* Include the bits for control and shift
1343 only if the basic ASCII code can't indicate them. */
1347 /* Replace the high bits. */
1348 c
|= (upper
& ~ctrl_modifier
);
1355 /* Input of single characters from keyboard */
1357 Lisp_Object
print_help ();
1358 static Lisp_Object
kbd_buffer_get_event ();
1360 /* read a character from the keyboard; call the redisplay if needed */
1361 /* commandflag 0 means do not do auto-saving, but do do redisplay.
1362 -1 means do not do redisplay, but do do autosaving.
1365 /* The arguments MAPS and NMAPS are for menu prompting.
1366 MAPS is an array of keymaps; NMAPS is the length of MAPS.
1368 PREV_EVENT is the previous input event, or nil if we are reading
1369 the first event of a key sequence.
1371 If USED_MOUSE_MENU is non-zero, then we set *USED_MOUSE_MENU to 1
1372 if we used a mouse menu to read the input, or zero otherwise. If
1373 USED_MOUSE_MENU is zero, *USED_MOUSE_MENU is left alone.
1375 Value is t if we showed a menu and the user rejected it. */
1378 read_char (commandflag
, nmaps
, maps
, prev_event
, used_mouse_menu
)
1382 Lisp_Object prev_event
;
1383 int *used_mouse_menu
;
1385 register Lisp_Object c
;
1389 if (CONSP (unread_command_events
))
1391 c
= XCONS (unread_command_events
)->car
;
1392 unread_command_events
= XCONS (unread_command_events
)->cdr
;
1394 if (this_command_key_count
== 0)
1400 if (unread_command_char
!= -1)
1402 XSET (c
, Lisp_Int
, unread_command_char
);
1403 unread_command_char
= -1;
1405 if (this_command_key_count
== 0)
1411 if (!NILP (Vexecuting_macro
))
1414 /* We set this to Qmacro; since that's not a frame, nobody will
1415 try to switch frames on us, and the selected window will
1418 Since this event came from a macro, it would be misleading to
1419 leave internal_last_event_frame set to wherever the last
1420 real event came from. Normally, a switch-frame event selects
1421 internal_last_event_frame after each command is read, but
1422 events read from a macro should never cause a new frame to be
1424 Vlast_event_frame
= internal_last_event_frame
= Qmacro
;
1427 /* Exit the macro if we are at the end.
1428 Also, some things replace the macro with t
1429 to force an early exit. */
1430 if (EQ (Vexecuting_macro
, Qt
)
1431 || executing_macro_index
>= XFASTINT (Flength (Vexecuting_macro
)))
1433 XSET (c
, Lisp_Int
, -1);
1437 c
= Faref (Vexecuting_macro
, make_number (executing_macro_index
));
1438 if (XTYPE (Vexecuting_macro
) == Lisp_String
1439 && (XINT (c
) & 0x80))
1440 XFASTINT (c
) = CHAR_META
| (XINT (c
) & ~0x80);
1442 executing_macro_index
++;
1447 if (!NILP (unread_switch_frame
))
1449 c
= unread_switch_frame
;
1450 unread_switch_frame
= Qnil
;
1452 /* This event should make it into this_command_keys, and get echoed
1453 again, so we go to reread_first, rather than reread. */
1457 if (commandflag
>= 0 && !input_pending
&& !detect_input_pending ())
1458 prepare_menu_bars ();
1460 /* Save outer setjmp data, in case called recursively. */
1461 save_getcjmp (save_jump
);
1465 if (commandflag
>= 0 && !input_pending
&& !detect_input_pending ())
1468 if (_setjmp (getcjmp
))
1470 XSET (c
, Lisp_Int
, quit_char
);
1472 XSET (internal_last_event_frame
, Lisp_Frame
, selected_frame
);
1473 Vlast_event_frame
= internal_last_event_frame
;
1475 /* If we report the quit char as an event,
1476 don't do so more than once. */
1477 if (!NILP (Vinhibit_quit
))
1483 /* Message turns off echoing unless more keystrokes turn it on again. */
1484 if (echo_area_glyphs
&& *echo_area_glyphs
&& echo_area_glyphs
!= echobuf
)
1487 /* If already echoing, continue. */
1490 /* Try reading a character via menu prompting in the minibuf.
1491 Try this before the sit-for, because the sit-for
1492 would do the wrong thing if we are supposed to do
1493 menu prompting. If EVENT_HAS_PARAMETERS then we are reading
1494 after a mouse event so don't try a minibuf menu. */
1496 if (nmaps
> 0 && INTERACTIVE
&&
1497 !NILP (prev_event
) && ! EVENT_HAS_PARAMETERS (prev_event
))
1499 c
= read_char_minibuf_menu_prompt (commandflag
, nmaps
, maps
);
1500 if ( ! NILP(c
) ) return c
;
1503 /* If in middle of key sequence and minibuffer not active,
1504 start echoing if enough time elapses. */
1505 if (minibuf_level
== 0 && !immediate_echo
&& this_command_key_count
> 0
1507 && echo_keystrokes
> 0
1508 && (echo_area_glyphs
== 0 || *echo_area_glyphs
== 0))
1512 /* After a mouse event, start echoing right away.
1513 This is because we are probably about to display a menu,
1514 and we don't want to delay before doing so. */
1515 if (EVENT_HAS_PARAMETERS (prev_event
))
1519 tem0
= sit_for (echo_keystrokes
, 0, 1, 1);
1525 /* Maybe auto save due to number of keystrokes or idle time. */
1527 if (commandflag
!= 0
1528 && auto_save_interval
> 0
1529 && num_nonmacro_input_chars
- last_auto_save
> max (auto_save_interval
, 20)
1530 && !detect_input_pending ())
1533 save_getcjmp (temp
);
1534 Fdo_auto_save (Qnil
, Qnil
);
1535 restore_getcjmp (temp
);
1538 /* Try reading using an X menu.
1539 This is never confused with reading using the minibuf because the recursive
1540 call of read_char in read_char_minibuf_menu_prompt does not pass on
1542 if (nmaps
> 0 && INTERACTIVE
&&
1543 !NILP (prev_event
) && EVENT_HAS_PARAMETERS (prev_event
))
1544 c
= read_char_x_menu_prompt (nmaps
, maps
, prev_event
, used_mouse_menu
);
1546 /* Slow down auto saves logarithmically in size of current buffer,
1547 and garbage collect while we're at it. */
1548 if (INTERACTIVE
&& NILP (c
))
1550 int delay_level
, buffer_size
;
1552 if (! MINI_WINDOW_P (XWINDOW (selected_window
)))
1553 last_non_minibuf_size
= Z
- BEG
;
1554 buffer_size
= (last_non_minibuf_size
>> 8) + 1;
1556 while (buffer_size
> 64)
1557 delay_level
++, buffer_size
-= buffer_size
>> 2;
1558 if (delay_level
< 4) delay_level
= 4;
1559 /* delay_level is 4 for files under around 50k, 7 at 100k,
1560 9 at 200k, 11 at 300k, and 12 at 500k. It is 15 at 1 meg. */
1562 /* Auto save if enough time goes by without input. */
1563 if (commandflag
!= 0
1564 && num_nonmacro_input_chars
> last_auto_save
1565 && XTYPE (Vauto_save_timeout
) == Lisp_Int
1566 && XINT (Vauto_save_timeout
) > 0)
1569 int delay
= delay_level
* XFASTINT (Vauto_save_timeout
) / 4;
1570 tem0
= sit_for (delay
, 0, 1, 1);
1574 save_getcjmp (temp
);
1575 Fdo_auto_save (Qnil
, Qnil
);
1576 restore_getcjmp (temp
);
1578 /* If we have auto-saved and there is still no input
1579 available, garbage collect if there has been enough
1580 consing going on to make it worthwhile. */
1581 if (!detect_input_pending ()
1582 && consing_since_gc
> gc_cons_threshold
/ 2)
1584 Fgarbage_collect ();
1585 /* prepare_menu_bars isn't safe here, but it should
1586 also be unnecessary. */
1593 /* Actually read a character, waiting if necessary. */
1596 c
= kbd_buffer_get_event ();
1599 if (commandflag
>= 0 && !input_pending
&& !detect_input_pending ())
1603 /* Terminate Emacs in batch mode if at eof. */
1604 if (noninteractive
&& XTYPE (c
) == Lisp_Int
&& XINT (c
) < 0)
1605 Fkill_emacs (make_number (1));
1607 if (XTYPE (c
) == Lisp_Int
)
1609 /* Add in any extra modifiers, where appropriate. */
1610 if ((extra_keyboard_modifiers
& CHAR_CTL
)
1611 || ((extra_keyboard_modifiers
& 0177) < ' '
1612 && (extra_keyboard_modifiers
& 0177) != 0))
1613 XSETINT (c
, make_ctrl_char (XINT (c
)));
1615 /* Transfer any other modifier bits directly from
1616 extra_keyboard_modifiers to c. Ignore the actual character code
1617 in the low 16 bits of extra_keyboard_modifiers. */
1618 XSETINT (c
, XINT (c
) | (extra_keyboard_modifiers
& ~0xff7f & ~CHAR_CTL
));
1623 restore_getcjmp (save_jump
);
1627 echo_area_glyphs
= 0;
1629 /* Handle things that only apply to characters. */
1630 if (XTYPE (c
) == Lisp_Int
)
1632 /* If kbd_buffer_get_event gave us an EOF, return that. */
1636 if (XTYPE (Vkeyboard_translate_table
) == Lisp_String
1637 && XSTRING (Vkeyboard_translate_table
)->size
> XFASTINT (c
))
1638 XSETINT (c
, XSTRING (Vkeyboard_translate_table
)->data
[XFASTINT (c
)]);
1642 XVECTOR (recent_keys
)->contents
[recent_keys_index
] = c
;
1643 if (++recent_keys_index
>= NUM_RECENT_KEYS
)
1644 recent_keys_index
= 0;
1646 /* Write c to the dribble file. If c is a lispy event, write
1647 the event's symbol to the dribble file, in <brackets>. Bleaugh.
1648 If you, dear reader, have a better idea, you've got the source. :-) */
1651 if (XTYPE (c
) == Lisp_Int
)
1652 putc (XINT (c
), dribble
);
1655 Lisp_Object dribblee
= c
;
1657 /* If it's a structured event, take the event header. */
1658 dribblee
= EVENT_HEAD (dribblee
);
1660 if (XTYPE (dribblee
) == Lisp_Symbol
)
1662 putc ('<', dribble
);
1663 fwrite (XSYMBOL (dribblee
)->name
->data
, sizeof (char),
1664 XSYMBOL (dribblee
)->name
->size
,
1666 putc ('>', dribble
);
1673 store_kbd_macro_char (c
);
1675 num_nonmacro_input_chars
++;
1680 /* Record this character as part of the current key.
1681 Don't record mouse motion; it should never matter. */
1682 if (! (EVENT_HAS_PARAMETERS (c
)
1683 && EQ (EVENT_HEAD_KIND (EVENT_HEAD (c
)), Qmouse_movement
)))
1686 add_command_key (c
);
1689 /* Re-reading in the middle of a command */
1691 last_input_char
= c
;
1694 /* Process the help character specially if enabled */
1695 if (EQ (c
, Vhelp_char
) && !NILP (Vhelp_form
))
1698 count
= specpdl_ptr
- specpdl
;
1700 record_unwind_protect (Fset_window_configuration
,
1701 Fcurrent_window_configuration (Qnil
));
1703 tem0
= Feval (Vhelp_form
);
1704 if (XTYPE (tem0
) == Lisp_String
)
1705 internal_with_output_to_temp_buffer ("*Help*", print_help
, tem0
);
1708 c
= read_char (0, 0, 0, Qnil
, 0);
1709 /* Remove the help from the frame */
1710 unbind_to (count
, Qnil
);
1711 prepare_menu_bars ();
1713 if (EQ (c
, make_number (040)))
1716 c
= read_char (0, 0, 0, Qnil
, 0);
1727 Fprinc (object
, Qnil
);
1731 /* Copy out or in the info on where C-g should throw to.
1732 This is used when running Lisp code from within get_char,
1733 in case get_char is called recursively.
1734 See read_process_output. */
1739 bcopy (getcjmp
, temp
, sizeof getcjmp
);
1742 restore_getcjmp (temp
)
1745 bcopy (temp
, getcjmp
, sizeof getcjmp
);
1749 /* Restore mouse tracking enablement. See Ftrack_mouse for the only use
1750 of this function. */
1752 tracking_off (old_value
)
1753 Lisp_Object old_value
;
1755 if (! XFASTINT (old_value
))
1757 do_mouse_tracking
= 0;
1759 /* Redisplay may have been preempted because there was input
1760 available, and it assumes it will be called again after the
1761 input has been processed. If the only input available was
1762 the sort that we have just disabled, then we need to call
1764 if (!readable_events ())
1766 prepare_menu_bars ();
1767 redisplay_preserve_echo_area ();
1768 get_input_pending (&input_pending
);
1773 DEFUN ("track-mouse", Ftrack_mouse
, Strack_mouse
, 0, UNEVALLED
, 0,
1774 "Evaluate BODY with mouse movement events enabled.\n\
1775 Within a `track-mouse' form, mouse motion generates input events that\n\
1776 you can read with `read-event'.\n\
1777 Normally, mouse motion is ignored.")
1781 int count
= specpdl_ptr
- specpdl
;
1784 XSET (val
, Lisp_Int
, do_mouse_tracking
);
1785 record_unwind_protect (tracking_off
, val
);
1787 do_mouse_tracking
= 1;
1789 val
= Fprogn (args
);
1790 return unbind_to (count
, val
);
1793 /* Low level keyboard/mouse input.
1794 kbd_buffer_store_event places events in kbd_buffer, and
1795 kbd_buffer_get_event retrieves them.
1796 mouse_moved indicates when the mouse has moved again, and
1797 *mouse_position_hook provides the mouse position. */
1799 /* Return true iff there are any events in the queue that read-char
1800 would return. If this returns false, a read-char would block. */
1804 return ! EVENT_QUEUES_EMPTY
;
1807 /* Set this for debugging, to have a way to get out */
1810 /* Store an event obtained at interrupt level into kbd_buffer, fifo */
1813 kbd_buffer_store_event (event
)
1814 register struct input_event
*event
;
1816 if (event
->kind
== no_event
)
1819 if (event
->kind
== ascii_keystroke
)
1821 register int c
= event
->code
& 0377;
1823 if (event
->modifiers
& ctrl_modifier
)
1824 c
= make_ctrl_char (c
);
1826 c
|= (event
->modifiers
1827 & (meta_modifier
| alt_modifier
1828 | hyper_modifier
| super_modifier
));
1832 extern SIGTYPE
interrupt_signal ();
1835 /* If this results in a quit_char being returned to Emacs as
1836 input, set Vlast_event_frame properly. If this doesn't
1837 get returned to Emacs as an event, the next event read
1838 will set Vlast_event_frame again, so this is safe to do. */
1841 = FRAME_FOCUS_FRAME (XFRAME (event
->frame_or_window
));
1844 internal_last_event_frame
= event
->frame_or_window
;
1846 internal_last_event_frame
= focus
;
1847 Vlast_event_frame
= internal_last_event_frame
;
1851 last_event_timestamp
= event
->timestamp
;
1852 interrupt_signal ();
1856 if (c
&& c
== stop_character
)
1863 if (kbd_store_ptr
- kbd_buffer
== KBD_BUFFER_SIZE
)
1864 kbd_store_ptr
= kbd_buffer
;
1866 /* Don't let the very last slot in the buffer become full,
1867 since that would make the two pointers equal,
1868 and that is indistinguishable from an empty buffer.
1869 Discard the event if it would fill the last slot. */
1870 if (kbd_fetch_ptr
- 1 != kbd_store_ptr
)
1872 kbd_store_ptr
->kind
= event
->kind
;
1873 if (event
->kind
== selection_request_event
)
1875 /* We must not use the ordinary copying code for this case,
1876 since `part' is an enum and copying it might not copy enough
1878 bcopy (event
, kbd_store_ptr
, sizeof (*event
));
1882 kbd_store_ptr
->code
= event
->code
;
1883 kbd_store_ptr
->part
= event
->part
;
1884 kbd_store_ptr
->frame_or_window
= event
->frame_or_window
;
1885 kbd_store_ptr
->modifiers
= event
->modifiers
;
1886 kbd_store_ptr
->x
= event
->x
;
1887 kbd_store_ptr
->y
= event
->y
;
1888 kbd_store_ptr
->timestamp
= event
->timestamp
;
1890 (XVECTOR (kbd_buffer_frame_or_window
)->contents
[kbd_store_ptr
1892 = event
->frame_or_window
);
1898 /* Read one event from the event buffer, waiting if necessary.
1899 The value is a Lisp object representing the event.
1900 The value is nil for an event that should be ignored,
1901 or that was handled here.
1902 We always read and discard one event. */
1905 kbd_buffer_get_event ()
1913 XSET (obj
, Lisp_Int
, c
);
1917 /* Wait until there is input available. */
1920 if (!EVENT_QUEUES_EMPTY
)
1923 /* If the quit flag is set, then read_char will return
1924 quit_char, so that counts as "available input." */
1925 if (!NILP (Vquit_flag
))
1926 quit_throw_to_read_char ();
1928 /* One way or another, wait until input is available; then, if
1929 interrupt handlers have not read it, read it now. */
1932 wait_for_kbd_input ();
1934 /* Note SIGIO has been undef'd if FIONREAD is missing. */
1938 if (EVENT_QUEUES_EMPTY
)
1940 Lisp_Object minus_one
;
1942 XSET (minus_one
, Lisp_Int
, -1);
1943 wait_reading_process_input (0, 0, minus_one
, 1);
1945 if (!interrupt_input
&& EVENT_QUEUES_EMPTY
)
1946 /* Pass 1 for EXPECT since we just waited to have input. */
1947 read_avail_input (1);
1949 #endif /* not VMS */
1952 /* At this point, we know that there is a readable event available
1953 somewhere. If the event queue is empty, then there must be a
1954 mouse movement enabled and available. */
1955 if (kbd_fetch_ptr
!= kbd_store_ptr
)
1957 struct input_event
*event
;
1959 event
= ((kbd_fetch_ptr
< kbd_buffer
+ KBD_BUFFER_SIZE
)
1963 last_event_timestamp
= event
->timestamp
;
1967 /* These two kinds of events get special handling
1968 and don't actually appear to the command loop.
1969 We return nil for them. */
1970 if (event
->kind
== selection_request_event
)
1973 x_handle_selection_request (event
);
1974 kbd_fetch_ptr
= event
+ 1;
1976 /* We're getting selection request events, but we don't have
1982 else if (event
->kind
== selection_clear_event
)
1985 x_handle_selection_clear (event
);
1986 kbd_fetch_ptr
= event
+ 1;
1988 /* We're getting selection request events, but we don't have
1994 else if (event
->kind
== delete_window_event
)
1996 Lisp_Object tail
, frame
;
1999 /* If the user destroys the only frame, Emacs should exit.
2000 Count visible frames and iconified frames. */
2001 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
2003 frame
= XCONS (tail
)->car
;
2004 if (XTYPE (frame
) != Lisp_Frame
|| EQ (frame
, event
->frame_or_window
))
2007 if (FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
))
2014 Fdelete_frame (event
->frame_or_window
, Qt
);
2015 kbd_fetch_ptr
= event
+ 1;
2018 /* Just discard these, by returning nil.
2019 (They shouldn't be found in the buffer,
2020 but on some machines it appears they do show up.) */
2021 else if (event
->kind
== no_event
)
2022 kbd_fetch_ptr
= event
+ 1;
2024 /* If this event is on a different frame, return a switch-frame this
2025 time, and leave the event in the queue for next time. */
2029 Lisp_Object frame
= event
->frame_or_window
;
2032 if (XTYPE (frame
) == Lisp_Window
)
2033 frame
= WINDOW_FRAME (XWINDOW (frame
));
2035 focus
= FRAME_FOCUS_FRAME (XFRAME (frame
));
2039 if (! EQ (frame
, internal_last_event_frame
)
2040 && XFRAME (frame
) != selected_frame
)
2041 obj
= make_lispy_switch_frame (frame
);
2042 internal_last_event_frame
= frame
;
2043 #endif /* MULTI_FRAME */
2045 /* If we didn't decide to make a switch-frame event, go ahead
2046 and build a real event from the queue entry. */
2050 obj
= make_lispy_event (event
);
2052 /* Wipe out this event, to catch bugs. */
2053 event
->kind
= no_event
;
2054 (XVECTOR (kbd_buffer_frame_or_window
)->contents
[event
- kbd_buffer
]
2057 kbd_fetch_ptr
= event
+ 1;
2061 /* Try generating a mouse motion event. */
2062 else if (do_mouse_tracking
&& mouse_moved
)
2065 Lisp_Object bar_window
;
2066 enum scroll_bar_part part
;
2070 (*mouse_position_hook
) (&f
, &bar_window
, &part
, &x
, &y
, &time
);
2075 /* Decide if we should generate a switch-frame event. Don't
2076 generate switch-frame events for motion outside of all Emacs
2080 Lisp_Object frame
= FRAME_FOCUS_FRAME (f
);
2083 XSET (frame
, Lisp_Frame
, f
);
2085 if (! EQ (frame
, internal_last_event_frame
)
2086 && XFRAME (frame
) != selected_frame
)
2087 obj
= make_lispy_switch_frame (frame
);
2088 internal_last_event_frame
= frame
;
2092 /* If we didn't decide to make a switch-frame event, go ahead and
2093 return a mouse-motion event. */
2095 obj
= make_lispy_movement (f
, bar_window
, part
, x
, y
, time
);
2098 /* We were promised by the above while loop that there was
2099 something for us to read! */
2102 input_pending
= readable_events ();
2105 Vlast_event_frame
= internal_last_event_frame
;
2111 /* Process any events that are not user-visible,
2112 then return, without reading any user-visible events. */
2117 while (kbd_fetch_ptr
!= kbd_store_ptr
)
2119 struct input_event
*event
;
2121 event
= ((kbd_fetch_ptr
< kbd_buffer
+ KBD_BUFFER_SIZE
)
2125 last_event_timestamp
= event
->timestamp
;
2127 /* These two kinds of events get special handling
2128 and don't actually appear to the command loop. */
2129 if (event
->kind
== selection_request_event
)
2132 x_handle_selection_request (event
);
2133 kbd_fetch_ptr
= event
+ 1;
2135 /* We're getting selection request events, but we don't have
2141 else if (event
->kind
== selection_clear_event
)
2144 x_handle_selection_clear (event
);
2145 kbd_fetch_ptr
= event
+ 1;
2147 /* We're getting selection request events, but we don't have
2156 get_input_pending (&input_pending
);
2159 /* Caches for modify_event_symbol. */
2160 static Lisp_Object accent_key_syms
;
2161 static Lisp_Object vendor_key_syms
;
2162 static Lisp_Object func_key_syms
;
2163 static Lisp_Object mouse_syms
;
2165 Lisp_Object Vvendor_key_alist
;
2167 /* This is a list of keysym codes for special "accent" characters.
2168 It parallels lispy_accent_keys. */
2170 static int lispy_accent_codes
[] =
2172 #ifdef XK_dead_circumflex
2177 #ifdef XK_dead_grave
2182 #ifdef XK_dead_tilde
2187 #ifdef XK_dead_diaeresis
2192 #ifdef XK_dead_macron
2197 #ifdef XK_dead_degree
2202 #ifdef XK_dead_acute
2207 #ifdef XK_dead_cedilla
2212 #ifdef XK_dead_breve
2217 #ifdef XK_dead_ogonek
2222 #ifdef XK_dead_caron
2227 #ifdef XK_dead_doubleacute
2228 XK_dead_doubleacute
,
2232 #ifdef XK_dead_abovedot
2239 /* This is a list of Lisp names for special "accent" characters.
2240 It parallels lispy_accent_codes. */
2242 static char *lispy_accent_keys
[] =
2259 /* You'll notice that this table is arranged to be conveniently
2260 indexed by X Windows keysym values. */
2261 static char *lispy_function_keys
[] =
2263 /* X Keysym value */
2265 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff00 */
2273 0, 0, 0, /* 0xff10 */
2275 0, 0, 0, 0, 0, 0, 0,
2278 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff20...2f */
2279 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff30...3f */
2280 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff40...4f */
2282 "home", /* 0xff50 */ /* IsCursorKey */
2293 "select", /* 0xff60 */ /* IsMiscFunctionKey */
2304 "break", /* 0xff6b */
2306 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
2308 0, 0, 0, 0, 0, 0, 0, 0, "kp-numlock", /* 0xff7f */
2309 "kp-space", /* 0xff80 */ /* IsKeypadKey */
2310 0, 0, 0, 0, 0, 0, 0, 0,
2311 "kp-tab", /* 0xff89 */
2313 "kp-enter", /* 0xff8d */
2315 "kp-f1", /* 0xff91 */
2320 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
2321 "kp-multiply", /* 0xffaa */
2326 "kp-divide", /* 0xffaf */
2327 "kp-0", /* 0xffb0 */
2328 "kp-1", "kp-2", "kp-3", "kp-4", "kp-5", "kp-6", "kp-7", "kp-8", "kp-9",
2331 "kp-equal", /* 0xffbd */
2332 "f1", /* 0xffbe */ /* IsFunctionKey */
2334 "f3", "f4", "f5", "f6", "f7", "f8", "f9", "f10", /* 0xffc0 */
2335 "f11", "f12", "f13", "f14", "f15", "f16", "f17", "f18",
2336 "f19", "f20", "f21", "f22", "f23", "f24", "f25", "f26", /* 0xffd0 */
2337 "f27", "f28", "f29", "f30", "f31", "f32", "f33", "f34",
2338 "f35", 0, 0, 0, 0, 0, 0, 0, /* 0xffe0 */
2339 0, 0, 0, 0, 0, 0, 0, 0,
2340 0, 0, 0, 0, 0, 0, 0, 0, /* 0xfff0 */
2341 0, 0, 0, 0, 0, 0, 0, "delete"
2344 static char *lispy_mouse_names
[] =
2346 "mouse-1", "mouse-2", "mouse-3", "mouse-4", "mouse-5"
2349 /* Scroll bar parts. */
2350 Lisp_Object Qabove_handle
, Qhandle
, Qbelow_handle
;
2352 /* An array of scroll bar parts, indexed by an enum scroll_bar_part value. */
2353 Lisp_Object
*scroll_bar_parts
[] = {
2354 &Qabove_handle
, &Qhandle
, &Qbelow_handle
2358 /* A vector, indexed by button number, giving the down-going location
2359 of currently depressed buttons, both scroll bar and non-scroll bar.
2361 The elements have the form
2362 (BUTTON-NUMBER MODIFIER-MASK . REST)
2363 where REST is the cdr of a position as it would be reported in the event.
2365 The make_lispy_event function stores positions here to tell the
2366 difference between click and drag events, and to store the starting
2367 location to be included in drag events. */
2369 static Lisp_Object button_down_location
;
2371 /* Information about the most recent up-going button event: Which
2372 button, what location, and what time. */
2374 static int last_mouse_button
;
2375 static int last_mouse_x
;
2376 static int last_mouse_y
;
2377 static unsigned long button_down_time
;
2379 /* The maximum time between clicks to make a double-click,
2380 or Qnil to disable double-click detection,
2381 or Qt for no time limit. */
2382 Lisp_Object Vdouble_click_time
;
2384 /* The number of clicks in this multiple-click. */
2386 int double_click_count
;
2388 #ifdef USE_X_TOOLKIT
2389 extern Lisp_Object
map_event_to_object ();
2390 #endif /* USE_X_TOOLKIT */
2392 /* Given a struct input_event, build the lisp event which represents
2393 it. If EVENT is 0, build a mouse movement event from the mouse
2394 movement buffer, which should have a movement event in it.
2396 Note that events must be passed to this function in the order they
2397 are received; this function stores the location of button presses
2398 in order to build drag events when the button is released. */
2401 make_lispy_event (event
)
2402 struct input_event
*event
;
2406 #ifdef SWITCH_ENUM_BUG
2407 switch ((int) event
->kind
)
2409 switch (event
->kind
)
2412 /* A simple keystroke. */
2413 case ascii_keystroke
:
2415 int c
= event
->code
& 0377;
2416 /* Turn ASCII characters into control characters
2418 if (event
->modifiers
& ctrl_modifier
)
2419 c
= make_ctrl_char (c
);
2421 /* Add in the other modifier bits. We took care of ctrl_modifier
2422 just above, and the shift key was taken care of by the X code,
2423 and applied to control characters by make_ctrl_char. */
2424 c
|= (event
->modifiers
2425 & (meta_modifier
| alt_modifier
2426 | hyper_modifier
| super_modifier
));
2427 button_down_time
= 0;
2431 /* A function key. The symbol may need to have modifier prefixes
2433 case non_ascii_keystroke
:
2434 button_down_time
= 0;
2436 for (i
= 0; i
< sizeof (lispy_accent_codes
) / sizeof (int); i
++)
2437 if (event
->code
== lispy_accent_codes
[i
])
2438 return modify_event_symbol (i
,
2440 Qfunction_key
, Qnil
,
2441 lispy_accent_keys
, &accent_key_syms
,
2442 (sizeof (lispy_accent_keys
)
2443 / sizeof (lispy_accent_keys
[0])));
2445 /* Handle vendor-specific keysyms. */
2446 if (event
->code
& (1 << 28))
2448 /* We need to use an alist rather than a vector as the cache
2449 since we can't make a vector long enuf. */
2450 if (NILP (vendor_key_syms
))
2451 vendor_key_syms
= Fcons (Qnil
, Qnil
);
2452 return modify_event_symbol (event
->code
& 0xffffff,
2454 Qfunction_key
, Vvendor_key_alist
,
2455 0, &vendor_key_syms
, 0xffffff);
2458 return modify_event_symbol (event
->code
- 0xff00,
2460 Qfunction_key
, Qnil
,
2461 lispy_function_keys
, &func_key_syms
,
2462 (sizeof (lispy_function_keys
)
2463 / sizeof (lispy_function_keys
[0])));
2466 /* A mouse click. Figure out where it is, decide whether it's
2467 a press, click or drag, and build the appropriate structure. */
2469 case scroll_bar_click
:
2471 int button
= event
->code
;
2473 Lisp_Object position
;
2474 Lisp_Object
*start_pos_ptr
;
2475 Lisp_Object start_pos
;
2477 if (button
< 0 || button
>= NUM_MOUSE_BUTTONS
)
2480 /* Build the position as appropriate for this mouse click. */
2481 if (event
->kind
== mouse_click
)
2484 FRAME_PTR f
= XFRAME (event
->frame_or_window
);
2486 = window_from_coordinates (f
, XINT (event
->x
), XINT (event
->y
),
2490 #ifdef USE_X_TOOLKIT
2491 if (FRAME_EXTERNAL_MENU_BAR (f
) && XINT (event
->y
) == -1)
2493 /* The click happened in the menubar.
2494 Look for the menu item selected. */
2495 Lisp_Object items
= map_event_to_object(event
, f
);
2496 XFASTINT (event
->y
) = 1;
2497 #else /* not USE_X_TOOLKIT */
2498 if (XINT (event
->y
) < FRAME_MENU_BAR_LINES (f
))
2502 items
= FRAME_MENU_BAR_ITEMS (f
);
2503 for (; CONSP (items
); items
= XCONS (items
)->cdr
)
2505 Lisp_Object pos
, string
;
2506 pos
= Fcdr (Fcdr (Fcar (items
)));
2507 string
= Fcar (Fcdr (Fcar (items
)));
2508 if (XINT (event
->x
) >= XINT (pos
)
2509 && XINT (event
->x
) < XINT (pos
) + XSTRING (string
)->size
)
2512 #endif /* not USE_X_TOOLKIT */
2514 = Fcons (event
->frame_or_window
,
2516 Fcons (Fcons (event
->x
, event
->y
),
2517 Fcons (make_number (event
->timestamp
),
2521 return Fcons (Fcar (Fcar (items
)),
2522 Fcons (position
, Qnil
));
2524 return Fcons (Qnil
, Fcons (position
, Qnil
));
2526 else if (XTYPE (window
) != Lisp_Window
)
2531 (XINT (event
->x
) - XINT (XWINDOW (window
)->left
)));
2533 (XINT (event
->y
) - XINT (XWINDOW (window
)->top
)));
2538 posn
= Qvertical_line
;
2540 XSET (posn
, Lisp_Int
,
2541 buffer_posn_from_coords (XWINDOW (window
),
2549 Fcons (Fcons (event
->x
, event
->y
),
2550 Fcons (make_number (event
->timestamp
),
2555 Lisp_Object window
= event
->frame_or_window
;
2556 Lisp_Object portion_whole
= Fcons (event
->x
, event
->y
);
2557 Lisp_Object part
= *scroll_bar_parts
[(int) event
->part
];
2561 Fcons (Qvertical_scroll_bar
,
2562 Fcons (portion_whole
,
2563 Fcons (make_number (event
->timestamp
),
2568 start_pos_ptr
= &XVECTOR (button_down_location
)->contents
[button
];
2570 start_pos
= *start_pos_ptr
;
2571 *start_pos_ptr
= Qnil
;
2573 is_double
= (button
== last_mouse_button
2574 && XINT (event
->x
) == last_mouse_x
2575 && XINT (event
->y
) == last_mouse_y
2576 && button_down_time
!= 0
2577 && (EQ (Vdouble_click_time
, Qt
)
2578 || (INTEGERP (Vdouble_click_time
)
2579 && ((int)(event
->timestamp
- button_down_time
)
2580 < XINT (Vdouble_click_time
)))));
2581 last_mouse_button
= button
;
2582 last_mouse_x
= XINT (event
->x
);
2583 last_mouse_y
= XINT (event
->y
);
2585 /* If this is a button press, squirrel away the location, so
2586 we can decide later whether it was a click or a drag. */
2587 if (event
->modifiers
& down_modifier
)
2591 double_click_count
++;
2592 event
->modifiers
|= ((double_click_count
> 2)
2597 double_click_count
= 1;
2598 button_down_time
= event
->timestamp
;
2599 *start_pos_ptr
= Fcopy_alist (position
);
2602 /* Now we're releasing a button - check the co-ordinates to
2603 see if this was a click or a drag. */
2604 else if (event
->modifiers
& up_modifier
)
2606 /* If we did not see a down before this up,
2607 ignore the up. Probably this happened because
2608 the down event chose a menu item.
2609 It would be an annoyance to treat the release
2610 of the button that chose the menu item
2611 as a separate event. */
2613 if (XTYPE (start_pos
) != Lisp_Cons
)
2616 event
->modifiers
&= ~up_modifier
;
2617 #if 0 /* Formerly we treated an up with no down as a click event. */
2618 if (XTYPE (start_pos
) != Lisp_Cons
)
2619 event
->modifiers
|= click_modifier
;
2623 /* The third element of every position should be the (x,y)
2625 Lisp_Object down
= Fnth (make_number (2), start_pos
);
2627 if (EQ (event
->x
, XCONS (down
)->car
)
2628 && EQ (event
->y
, XCONS (down
)->cdr
))
2630 if (is_double
&& double_click_count
> 1)
2631 event
->modifiers
|= ((double_click_count
> 2)
2635 event
->modifiers
|= click_modifier
;
2639 button_down_time
= 0;
2640 event
->modifiers
|= drag_modifier
;
2645 /* Every mouse event should either have the down_modifier or
2646 the up_modifier set. */
2650 /* Get the symbol we should use for the mouse click. */
2652 = modify_event_symbol (button
,
2655 lispy_mouse_names
, &mouse_syms
,
2656 (sizeof (lispy_mouse_names
)
2657 / sizeof (lispy_mouse_names
[0])));
2659 if (event
->modifiers
& drag_modifier
)
2664 else if (event
->modifiers
& (double_modifier
| triple_modifier
))
2667 Fcons (make_number (double_click_count
),
2676 /* The 'kind' field of the event is something we don't recognize. */
2683 make_lispy_movement (frame
, bar_window
, part
, x
, y
, time
)
2685 Lisp_Object bar_window
;
2686 enum scroll_bar_part part
;
2690 /* Is it a scroll bar movement? */
2691 if (frame
&& ! NILP (bar_window
))
2693 Lisp_Object part_sym
= *scroll_bar_parts
[(int) part
];
2695 return Fcons (Qscroll_bar_movement
,
2696 (Fcons (Fcons (bar_window
,
2697 Fcons (Qvertical_scroll_bar
,
2698 Fcons (Fcons (x
, y
),
2699 Fcons (make_number (time
),
2705 /* Or is it an ordinary mouse movement? */
2709 Lisp_Object window
=
2711 ? window_from_coordinates (frame
, XINT (x
), XINT (y
), &area
)
2715 if (XTYPE (window
) == Lisp_Window
)
2717 XSETINT (x
, XINT (x
) - XINT (XWINDOW (window
)->left
));
2718 XSETINT (y
, XINT (y
) - XINT (XWINDOW (window
)->top
));
2723 posn
= Qvertical_line
;
2725 XSET (posn
, Lisp_Int
,
2726 buffer_posn_from_coords (XWINDOW (window
),
2727 XINT (x
), XINT (y
)));
2729 else if (frame
!= 0)
2731 XSET (window
, Lisp_Frame
, frame
);
2742 return Fcons (Qmouse_movement
,
2743 Fcons (Fcons (window
,
2745 Fcons (Fcons (x
, y
),
2746 Fcons (make_number (time
),
2752 /* Construct a switch frame event. */
2754 make_lispy_switch_frame (frame
)
2757 return Fcons (Qswitch_frame
, Fcons (frame
, Qnil
));
2760 /* Manipulating modifiers. */
2762 /* Parse the name of SYMBOL, and return the set of modifiers it contains.
2764 If MODIFIER_END is non-zero, set *MODIFIER_END to the position in
2765 SYMBOL's name of the end of the modifiers; the string from this
2766 position is the unmodified symbol name.
2768 This doesn't use any caches. */
2770 parse_modifiers_uncached (symbol
, modifier_end
)
2774 struct Lisp_String
*name
;
2778 CHECK_SYMBOL (symbol
, 1);
2781 name
= XSYMBOL (symbol
)->name
;
2784 for (i
= 0; i
+2 <= name
->size
; )
2785 switch (name
->data
[i
])
2787 #define SINGLE_LETTER_MOD(bit) \
2788 if (name->data[i+1] != '-') \
2789 goto no_more_modifiers; \
2794 SINGLE_LETTER_MOD (alt_modifier
);
2798 SINGLE_LETTER_MOD (ctrl_modifier
);
2802 SINGLE_LETTER_MOD (hyper_modifier
);
2806 SINGLE_LETTER_MOD (meta_modifier
);
2810 SINGLE_LETTER_MOD (shift_modifier
);
2814 SINGLE_LETTER_MOD (super_modifier
);
2818 if (i
+ 5 > name
->size
)
2819 goto no_more_modifiers
;
2820 if (! strncmp (name
->data
+ i
, "drag-", 5))
2822 modifiers
|= drag_modifier
;
2825 else if (! strncmp (name
->data
+ i
, "down-", 5))
2827 modifiers
|= down_modifier
;
2830 else if (i
+ 7 <= name
->size
2831 && ! strncmp (name
->data
+ i
, "double-", 7))
2833 modifiers
|= double_modifier
;
2837 goto no_more_modifiers
;
2841 if (i
+ 7 > name
->size
)
2842 goto no_more_modifiers
;
2843 if (! strncmp (name
->data
+ i
, "triple-", 7))
2845 modifiers
|= triple_modifier
;
2849 goto no_more_modifiers
;
2853 goto no_more_modifiers
;
2855 #undef SINGLE_LETTER_MOD
2859 /* Should we include the `click' modifier? */
2860 if (! (modifiers
& (down_modifier
| drag_modifier
2861 | double_modifier
| triple_modifier
))
2862 && i
+ 7 == name
->size
2863 && strncmp (name
->data
+ i
, "mouse-", 6) == 0
2864 && ('0' <= name
->data
[i
+ 6] && name
->data
[i
+ 6] <= '9'))
2865 modifiers
|= click_modifier
;
2874 /* Return a symbol whose name is the modifier prefixes for MODIFIERS
2875 prepended to the string BASE[0..BASE_LEN-1].
2876 This doesn't use any caches. */
2878 apply_modifiers_uncached (modifiers
, base
, base_len
)
2883 /* Since BASE could contain nulls, we can't use intern here; we have
2884 to use Fintern, which expects a genuine Lisp_String, and keeps a
2887 (char *) alloca (sizeof ("A-C-H-M-S-s-down-drag-double-triple-"));
2893 /* Only the event queue may use the `up' modifier; it should always
2894 be turned into a click or drag event before presented to lisp code. */
2895 if (modifiers
& up_modifier
)
2898 if (modifiers
& alt_modifier
) { *p
++ = 'A'; *p
++ = '-'; }
2899 if (modifiers
& ctrl_modifier
) { *p
++ = 'C'; *p
++ = '-'; }
2900 if (modifiers
& hyper_modifier
) { *p
++ = 'H'; *p
++ = '-'; }
2901 if (modifiers
& meta_modifier
) { *p
++ = 'M'; *p
++ = '-'; }
2902 if (modifiers
& shift_modifier
) { *p
++ = 'S'; *p
++ = '-'; }
2903 if (modifiers
& super_modifier
) { *p
++ = 's'; *p
++ = '-'; }
2904 if (modifiers
& double_modifier
) { strcpy (p
, "double-"); p
+= 7; }
2905 if (modifiers
& triple_modifier
) { strcpy (p
, "triple-"); p
+= 7; }
2906 if (modifiers
& down_modifier
) { strcpy (p
, "down-"); p
+= 5; }
2907 if (modifiers
& drag_modifier
) { strcpy (p
, "drag-"); p
+= 5; }
2908 /* The click modifier is denoted by the absence of other modifiers. */
2912 mod_len
= p
- new_mods
;
2916 Lisp_Object new_name
= make_uninit_string (mod_len
+ base_len
);
2918 bcopy (new_mods
, XSTRING (new_name
)->data
, mod_len
);
2919 bcopy (base
, XSTRING (new_name
)->data
+ mod_len
, base_len
);
2921 return Fintern (new_name
, Qnil
);
2926 static char *modifier_names
[] =
2928 "up", "down", "drag", "click", "double", "triple", 0, 0,
2929 0, 0, 0, 0, 0, 0, 0, 0,
2930 0, 0, "alt", "super", "hyper", "shift", "control", "meta"
2932 #define NUM_MOD_NAMES (sizeof (modifier_names) / sizeof (modifier_names[0]))
2934 static Lisp_Object modifier_symbols
;
2936 /* Return the list of modifier symbols corresponding to the mask MODIFIERS. */
2938 lispy_modifier_list (modifiers
)
2941 Lisp_Object modifier_list
;
2944 modifier_list
= Qnil
;
2945 for (i
= 0; (1<<i
) <= modifiers
&& i
< NUM_MOD_NAMES
; i
++)
2946 if (modifiers
& (1<<i
))
2947 modifier_list
= Fcons (XVECTOR (modifier_symbols
)->contents
[i
],
2950 return modifier_list
;
2954 /* Parse the modifiers on SYMBOL, and return a list like (UNMODIFIED MASK),
2955 where UNMODIFIED is the unmodified form of SYMBOL,
2956 MASK is the set of modifiers present in SYMBOL's name.
2957 This is similar to parse_modifiers_uncached, but uses the cache in
2958 SYMBOL's Qevent_symbol_element_mask property, and maintains the
2959 Qevent_symbol_elements property. */
2961 parse_modifiers (symbol
)
2964 Lisp_Object elements
= Fget (symbol
, Qevent_symbol_element_mask
);
2966 if (CONSP (elements
))
2971 int modifiers
= parse_modifiers_uncached (symbol
, &end
);
2972 Lisp_Object unmodified
2973 = Fintern (make_string (XSYMBOL (symbol
)->name
->data
+ end
,
2974 XSYMBOL (symbol
)->name
->size
- end
),
2978 if (modifiers
& ~((1<<VALBITS
) - 1))
2980 XFASTINT (mask
) = modifiers
;
2981 elements
= Fcons (unmodified
, Fcons (mask
, Qnil
));
2983 /* Cache the parsing results on SYMBOL. */
2984 Fput (symbol
, Qevent_symbol_element_mask
,
2986 Fput (symbol
, Qevent_symbol_elements
,
2987 Fcons (unmodified
, lispy_modifier_list (modifiers
)));
2989 /* Since we know that SYMBOL is modifiers applied to unmodified,
2990 it would be nice to put that in unmodified's cache.
2991 But we can't, since we're not sure that parse_modifiers is
2998 /* Apply the modifiers MODIFIERS to the symbol BASE.
2999 BASE must be unmodified.
3001 This is like apply_modifiers_uncached, but uses BASE's
3002 Qmodifier_cache property, if present. It also builds
3003 Qevent_symbol_elements properties, since it has that info anyway.
3005 apply_modifiers copies the value of BASE's Qevent_kind property to
3006 the modified symbol. */
3008 apply_modifiers (modifiers
, base
)
3012 Lisp_Object cache
, index
, entry
, new_symbol
;
3014 /* Mask out upper bits. We don't know where this value's been. */
3015 modifiers
&= (1<<VALBITS
) - 1;
3017 /* The click modifier never figures into cache indices. */
3018 cache
= Fget (base
, Qmodifier_cache
);
3019 XFASTINT (index
) = (modifiers
& ~click_modifier
);
3020 entry
= Fassq (index
, cache
);
3023 new_symbol
= XCONS (entry
)->cdr
;
3026 /* We have to create the symbol ourselves. */
3027 new_symbol
= apply_modifiers_uncached (modifiers
,
3028 XSYMBOL (base
)->name
->data
,
3029 XSYMBOL (base
)->name
->size
);
3031 /* Add the new symbol to the base's cache. */
3032 entry
= Fcons (index
, new_symbol
);
3033 Fput (base
, Qmodifier_cache
, Fcons (entry
, cache
));
3035 /* We have the parsing info now for free, so add it to the caches. */
3036 XFASTINT (index
) = modifiers
;
3037 Fput (new_symbol
, Qevent_symbol_element_mask
,
3038 Fcons (base
, Fcons (index
, Qnil
)));
3039 Fput (new_symbol
, Qevent_symbol_elements
,
3040 Fcons (base
, lispy_modifier_list (modifiers
)));
3043 /* Make sure this symbol is of the same kind as BASE.
3045 You'd think we could just set this once and for all when we
3046 intern the symbol above, but reorder_modifiers may call us when
3047 BASE's property isn't set right; we can't assume that just
3048 because it has a Qmodifier_cache property it must have its
3049 Qevent_kind set right as well. */
3050 if (NILP (Fget (new_symbol
, Qevent_kind
)))
3052 Lisp_Object kind
= Fget (base
, Qevent_kind
);
3055 Fput (new_symbol
, Qevent_kind
, kind
);
3062 /* Given a symbol whose name begins with modifiers ("C-", "M-", etc),
3063 return a symbol with the modifiers placed in the canonical order.
3064 Canonical order is alphabetical, except for down and drag, which
3065 always come last. The 'click' modifier is never written out.
3067 Fdefine_key calls this to make sure that (for example) C-M-foo
3068 and M-C-foo end up being equivalent in the keymap. */
3071 reorder_modifiers (symbol
)
3074 /* It's hopefully okay to write the code this way, since everything
3075 will soon be in caches, and no consing will be done at all. */
3076 Lisp_Object parsed
= parse_modifiers (symbol
);
3078 return apply_modifiers (XCONS (XCONS (parsed
)->cdr
)->car
,
3079 XCONS (parsed
)->car
);
3083 /* For handling events, we often want to produce a symbol whose name
3084 is a series of modifier key prefixes ("M-", "C-", etcetera) attached
3085 to some base, like the name of a function key or mouse button.
3086 modify_event_symbol produces symbols of this sort.
3088 NAME_TABLE should point to an array of strings, such that NAME_TABLE[i]
3089 is the name of the i'th symbol. TABLE_SIZE is the number of elements
3092 Alternatively, NAME_ALIST is an alist mapping codes into symbol names.
3093 NAME_ALIST is used if it is non-nil; otherwise NAME_TABLE is used.
3095 SYMBOL_TABLE should be a pointer to a Lisp_Object whose value will
3096 persist between calls to modify_event_symbol that it can use to
3097 store a cache of the symbols it's generated for this NAME_TABLE
3098 before. The object stored there may be a vector or an alist.
3100 SYMBOL_NUM is the number of the base name we want from NAME_TABLE.
3102 MODIFIERS is a set of modifier bits (as given in struct input_events)
3103 whose prefixes should be applied to the symbol name.
3105 SYMBOL_KIND is the value to be placed in the event_kind property of
3106 the returned symbol.
3108 The symbols we create are supposed to have an
3109 `event-symbol-elements' property, which lists the modifiers present
3110 in the symbol's name. */
3113 modify_event_symbol (symbol_num
, modifiers
, symbol_kind
, name_alist
,
3114 name_table
, symbol_table
, table_size
)
3117 Lisp_Object symbol_kind
;
3118 Lisp_Object name_alist
;
3120 Lisp_Object
*symbol_table
;
3124 Lisp_Object symbol_int
;
3126 XSET (symbol_int
, Lisp_Int
, symbol_num
);
3128 /* Is this a request for a valid symbol? */
3129 if (symbol_num
< 0 || symbol_num
>= table_size
)
3132 if (CONSP (*symbol_table
))
3133 value
= Fcdr (assq_no_quit (symbol_int
, *symbol_table
));
3135 /* If *symbol_table doesn't seem to be initialized properly, fix that.
3136 *symbol_table should be a lisp vector TABLE_SIZE elements long,
3137 where the Nth element is the symbol for NAME_TABLE[N], or nil if
3138 we've never used that symbol before. */
3141 if (! VECTORP (*symbol_table
)
3142 || XVECTOR (*symbol_table
)->size
!= table_size
)
3146 XFASTINT (size
) = table_size
;
3147 *symbol_table
= Fmake_vector (size
, Qnil
);
3150 value
= XVECTOR (*symbol_table
)->contents
[symbol_num
];
3153 /* Have we already used this symbol before? */
3156 /* No; let's create it. */
3157 if (!NILP (name_alist
))
3158 value
= Fassq (symbol_int
, name_alist
);
3159 else if (name_table
[symbol_num
])
3160 value
= intern (name_table
[symbol_num
]);
3164 sprintf (buf
, "key-%d", symbol_num
);
3165 value
= intern (buf
);
3168 if (CONSP (*symbol_table
))
3169 *symbol_table
= Fcons (value
, *symbol_table
);
3171 XVECTOR (*symbol_table
)->contents
[symbol_num
] = value
;
3173 /* Fill in the cache entries for this symbol; this also
3174 builds the Qevent_symbol_elements property, which the user
3176 apply_modifiers (modifiers
& click_modifier
, value
);
3177 Fput (value
, Qevent_kind
, symbol_kind
);
3180 /* Apply modifiers to that symbol. */
3181 return apply_modifiers (modifiers
, value
);
3185 /* Store into *addr a value nonzero if terminal input chars are available.
3186 Serves the purpose of ioctl (0, FIONREAD, addr)
3187 but works even if FIONREAD does not exist.
3188 (In fact, this may actually read some input.) */
3191 get_input_pending (addr
)
3194 /* First of all, have we already counted some input? */
3195 *addr
= !NILP (Vquit_flag
) || readable_events ();
3197 /* If input is being read as it arrives, and we have none, there is none. */
3198 if (*addr
> 0 || (interrupt_input
&& ! interrupts_deferred
))
3201 /* Try to read some input and see how much we get. */
3203 *addr
= !NILP (Vquit_flag
) || readable_events ();
3206 /* Interface to read_avail_input, blocking SIGIO if necessary. */
3209 gobble_input (expected
)
3214 if (interrupt_input
)
3217 mask
= sigblockx (SIGIO
);
3218 read_avail_input (expected
);
3223 read_avail_input (expected
);
3229 /* Read any terminal input already buffered up by the system
3230 into the kbd_buffer, but do not wait.
3232 EXPECTED should be nonzero if the caller knows there is some input.
3234 Except on VMS, all input is read by this function.
3235 If interrupt_input is nonzero, this function MUST be called
3236 only when SIGIO is blocked.
3238 Returns the number of keyboard chars read, or -1 meaning
3239 this is a bad time to try to read input. */
3242 read_avail_input (expected
)
3245 struct input_event buf
[KBD_BUFFER_SIZE
];
3249 if (read_socket_hook
)
3250 /* No need for FIONREAD or fcntl; just say don't wait. */
3251 nread
= (*read_socket_hook
) (0, buf
, KBD_BUFFER_SIZE
, expected
, expected
);
3254 /* Using KBD_BUFFER_SIZE - 1 here avoids reading more than
3255 the kbd_buffer can really hold. That may prevent loss
3256 of characters on some systems when input is stuffed at us. */
3257 unsigned char cbuf
[KBD_BUFFER_SIZE
- 1];
3260 nread
= dos_keysns ();
3261 if (nread
== 0) return 0;
3262 #else */ not MSDOS */
3264 /* Find out how much input is available. */
3265 if (ioctl (0, FIONREAD
, &nread
) < 0)
3266 /* Formerly simply reported no input, but that sometimes led to
3267 a failure of Emacs to terminate.
3268 SIGHUP seems appropriate if we can't reach the terminal. */
3269 /* ??? Is it really right to send the signal just to this process
3270 rather than to the whole process group?
3271 Perhaps on systems with FIONREAD Emacs is alone in its group. */
3272 kill (getpid (), SIGHUP
);
3275 if (nread
> sizeof cbuf
)
3276 nread
= sizeof cbuf
;
3277 #else /* no FIONREAD */
3278 #if defined(USG) || defined(DGUX)
3279 /* Read some input if available, but don't wait. */
3280 nread
= sizeof cbuf
;
3281 fcntl (fileno (stdin
), F_SETFL
, O_NDELAY
);
3286 #endif /* not MSDOS */
3288 /* Now read; for one reason or another, this will not block. */
3292 cbuf
[0] = dos_keyread();
3295 nread
= read (fileno (stdin
), cbuf
, nread
);
3298 /* The kernel sometimes fails to deliver SIGHUP for ptys.
3299 This looks incorrect, but it isn't, because _BSD causes
3300 O_NDELAY to be defined in fcntl.h as O_NONBLOCK,
3301 and that causes a value other than 0 when there is no input. */
3305 /* This code is wrong, but at least it gets the right results.
3306 Fix it for 19.23. */
3307 /* Retry the read if it is interrupted. */
3310 || ! (errno
== EAGAIN
|| errno
== EFAULT
3312 || ! (errno
== EAGAIN
3322 #if defined (USG) || defined (DGUX)
3323 fcntl (fileno (stdin
), F_SETFL
, 0);
3324 #endif /* USG or DGUX */
3325 #endif /* no FIONREAD */
3326 for (i
= 0; i
< nread
; i
++)
3328 buf
[i
].kind
= ascii_keystroke
;
3329 buf
[i
].modifiers
= 0;
3330 if (meta_key
== 1 && (cbuf
[i
] & 0x80))
3331 buf
[i
].modifiers
= meta_modifier
;
3335 XSET (buf
[i
].code
, Lisp_Int
, cbuf
[i
]);
3337 XSET (buf
[i
].frame_or_window
, Lisp_Frame
, selected_frame
);
3339 buf
[i
].frame_or_window
= Qnil
;
3344 /* Scan the chars for C-g and store them in kbd_buffer. */
3345 for (i
= 0; i
< nread
; i
++)
3347 kbd_buffer_store_event (&buf
[i
]);
3348 /* Don't look at input that follows a C-g too closely.
3349 This reduces lossage due to autorepeat on C-g. */
3350 if (buf
[i
].kind
== ascii_keystroke
3351 && XINT(buf
[i
].code
) == quit_char
)
3357 #endif /* not VMS */
3359 #ifdef SIGIO /* for entire page */
3360 /* Note SIGIO has been undef'd if FIONREAD is missing. */
3363 input_available_signal (signo
)
3366 /* Must preserve main program's value of errno. */
3367 int old_errno
= errno
;
3369 extern int select_alarmed
;
3373 /* USG systems forget handlers when they are used;
3374 must reestablish each time */
3375 signal (signo
, input_available_signal
);
3382 if (input_available_clear_time
)
3383 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3388 nread
= read_avail_input (1);
3389 /* -1 means it's not ok to read the input now.
3390 UNBLOCK_INPUT will read it later; now, avoid infinite loop.
3391 0 means there was no keyboard input available. */
3396 select_alarmed
= 1; /* Force the select emulator back to life */
3407 /* Send ourselves a SIGIO.
3409 This function exists so that the UNBLOCK_INPUT macro in
3410 blockinput.h can have some way to take care of input we put off
3411 dealing with, without assuming that every file which uses
3412 UNBLOCK_INPUT also has #included the files necessary to get SIGIO. */
3414 reinvoke_input_signal ()
3423 /* Return the prompt-string of a sparse keymap.
3424 This is the first element which is a string.
3425 Return nil if there is none. */
3433 register Lisp_Object tem
;
3435 if (XTYPE (tem
) == Lisp_String
)
3442 static Lisp_Object
menu_bar_item ();
3443 static Lisp_Object
menu_bar_one_keymap ();
3445 /* Return a list of menu items for a menu bar, appropriate
3446 to the current buffer.
3447 The elements have the form (KEY STRING . nil). */
3452 /* The number of keymaps we're scanning right now, and the number of
3453 keymaps we have allocated space for. */
3456 /* maps[0..nmaps-1] are the prefix definitions of KEYBUF[0..t-1]
3457 in the current keymaps, or nil where it is not a prefix. */
3460 Lisp_Object def
, tem
, tail
;
3467 /* In order to build the menus, we need to call the keymap
3468 accessors. They all call QUIT. But this function is called
3469 during redisplay, during which a quit is fatal. So inhibit
3470 quitting while building the menus.
3471 We do this instead of specbind because (1) errors will clear it anyway
3472 and (2) this avoids risk of specpdl overflow. */
3473 oquit
= Vinhibit_quit
;
3476 /* Build our list of keymaps.
3477 If we recognize a function key and replace its escape sequence in
3478 keybuf with its symbol, or if the sequence starts with a mouse
3479 click and we need to switch buffers, we jump back here to rebuild
3480 the initial keymaps from the current buffer. */
3484 if (!NILP (Voverriding_local_map
))
3487 maps
= (Lisp_Object
*) alloca (nmaps
* sizeof (maps
[0]));
3488 maps
[0] = Voverriding_local_map
;
3492 nmaps
= current_minor_maps (0, &tmaps
) + 2;
3493 maps
= (Lisp_Object
*) alloca (nmaps
* sizeof (maps
[0]));
3494 bcopy (tmaps
, maps
, (nmaps
- 2) * sizeof (maps
[0]));
3495 #ifdef USE_TEXT_PROPERTIES
3496 maps
[nmaps
-2] = get_local_map (PT
, current_buffer
);
3498 maps
[nmaps
-2] = current_buffer
->keymap
;
3501 maps
[nmaps
-1] = current_global_map
;
3504 /* Look up in each map the dummy prefix key `menu-bar'. */
3508 for (mapno
= nmaps
- 1; mapno
>= 0; mapno
--)
3510 if (! NILP (maps
[mapno
]))
3511 def
= get_keyelt (access_keymap (maps
[mapno
], Qmenu_bar
, 1, 0));
3515 tem
= Fkeymapp (def
);
3517 result
= menu_bar_one_keymap (def
, result
);
3520 for (tail
= Vmenu_bar_final_items
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3524 elt
= Fassq (XCONS (tail
)->car
, result
);
3526 result
= Fcons (elt
, Fdelq (elt
, result
));
3529 result
= Fnreverse (result
);
3530 Vinhibit_quit
= oquit
;
3534 /* Scan one map KEYMAP, accumulating any menu items it defines
3535 that have not yet been seen in RESULT. Return the updated RESULT. */
3538 menu_bar_one_keymap (keymap
, result
)
3539 Lisp_Object keymap
, result
;
3541 Lisp_Object tail
, item
, key
, binding
, item_string
, table
;
3543 /* Loop over all keymap entries that have menu strings. */
3544 for (tail
= keymap
; XTYPE (tail
) == Lisp_Cons
; tail
= XCONS (tail
)->cdr
)
3546 item
= XCONS (tail
)->car
;
3547 if (XTYPE (item
) == Lisp_Cons
)
3549 key
= XCONS (item
)->car
;
3550 binding
= XCONS (item
)->cdr
;
3551 if (XTYPE (binding
) == Lisp_Cons
)
3553 item_string
= XCONS (binding
)->car
;
3554 if (XTYPE (item_string
) == Lisp_String
)
3555 result
= menu_bar_item (key
, item_string
,
3556 Fcdr (binding
), result
);
3558 else if (EQ (binding
, Qundefined
))
3559 result
= menu_bar_item (key
, item_string
,
3562 else if (XTYPE (item
) == Lisp_Vector
)
3564 /* Loop over the char values represented in the vector. */
3565 int len
= XVECTOR (item
)->size
;
3567 for (c
= 0; c
< len
; c
++)
3569 Lisp_Object character
;
3570 XFASTINT (character
) = c
;
3571 binding
= XVECTOR (item
)->contents
[c
];
3572 if (XTYPE (binding
) == Lisp_Cons
)
3574 item_string
= XCONS (binding
)->car
;
3575 if (XTYPE (item_string
) == Lisp_String
)
3576 result
= menu_bar_item (key
, item_string
,
3577 Fcdr (binding
), result
);
3579 else if (EQ (binding
, Qundefined
))
3580 result
= menu_bar_item (key
, item_string
,
3589 /* This is used as the handler when calling internal_condition_case_1. */
3592 menu_bar_item_1 (arg
)
3599 menu_bar_item (key
, item_string
, def
, result
)
3600 Lisp_Object key
, item_string
, def
, result
;
3603 Lisp_Object enabled
;
3605 if (EQ (def
, Qundefined
))
3607 /* If a map has an explicit nil as definition,
3608 discard any previously made menu bar item. */
3609 tem
= Fassq (key
, result
);
3610 return Fdelq (tem
, result
);
3613 /* See if this entry is enabled. */
3616 if (XTYPE (def
) == Lisp_Symbol
)
3618 /* No property, or nil, means enable.
3619 Otherwise, enable if value is not nil. */
3620 tem
= Fget (def
, Qmenu_enable
);
3622 /* (condition-case nil (eval tem)
3624 enabled
= internal_condition_case_1 (Feval
, tem
, Qerror
,
3628 /* Add an entry for this key and string
3629 if there is none yet. */
3630 tem
= Fassq (key
, result
);
3631 if (!NILP (enabled
) && NILP (tem
))
3632 result
= Fcons (Fcons (key
, Fcons (item_string
, Qnil
)), result
);
3637 /* Read a character using menus based on maps in the array MAPS.
3638 NMAPS is the length of MAPS. Return nil if there are no menus in the maps.
3639 Return t if we displayed a menu but the user rejected it.
3641 PREV_EVENT is the previous input event, or nil if we are reading
3642 the first event of a key sequence.
3644 If USED_MOUSE_MENU is non-zero, then we set *USED_MOUSE_MENU to 1
3645 if we used a mouse menu to read the input, or zero otherwise. If
3646 USED_MOUSE_MENU is zero, *USED_MOUSE_MENU is left alone.
3648 The prompting is done based on the prompt-string of the map
3649 and the strings associated with various map elements.
3651 This can be done with X menus or with menus put in the minibuf.
3652 These are done in different ways, depending on how the input will be read.
3653 Menus using X are done after auto-saving in read-char, getting the input
3654 event from Fx_popup_menu; menus using the minibuf use read_char recursively
3655 and do auto-saving in the inner call of read_char. */
3658 read_char_x_menu_prompt (nmaps
, maps
, prev_event
, used_mouse_menu
)
3661 Lisp_Object prev_event
;
3662 int *used_mouse_menu
;
3665 register Lisp_Object name
;
3666 Lisp_Object rest
, vector
;
3668 if (used_mouse_menu
)
3669 *used_mouse_menu
= 0;
3671 /* Use local over global Menu maps */
3673 if (! menu_prompting
)
3676 /* Get the menu name from the first map that has one (a prompt string). */
3677 for (mapno
= 0; mapno
< nmaps
; mapno
++)
3679 name
= map_prompt (maps
[mapno
]);
3684 /* If we don't have any menus, just read a character normally. */
3688 #ifdef HAVE_X_WINDOWS
3690 /* If we got to this point via a mouse click,
3691 use a real menu for mouse selection. */
3692 if (EVENT_HAS_PARAMETERS (prev_event
))
3694 /* Display the menu and get the selection. */
3695 Lisp_Object
*realmaps
3696 = (Lisp_Object
*) alloca (nmaps
* sizeof (Lisp_Object
));
3700 /* Use the maps that are not nil. */
3701 for (mapno
= 0; mapno
< nmaps
; mapno
++)
3702 if (!NILP (maps
[mapno
]))
3703 realmaps
[nmaps1
++] = maps
[mapno
];
3705 value
= Fx_popup_menu (prev_event
, Flist (nmaps1
, realmaps
));
3708 /* If we got more than one event, put all but the first
3709 onto this list to be read later.
3710 Return just the first event now. */
3711 unread_command_events
3712 = nconc2 (XCONS (value
)->cdr
, unread_command_events
);
3713 value
= XCONS (value
)->car
;
3717 if (used_mouse_menu
)
3718 *used_mouse_menu
= 1;
3721 #endif /* HAVE_X_MENU */
3722 #endif /* HAVE_X_WINDOWS */
3727 read_char_minibuf_menu_prompt(commandflag
, nmaps
, maps
)
3733 register Lisp_Object name
;
3735 int width
= FRAME_WIDTH (selected_frame
) - 4;
3736 char *menu
= (char *) alloca (width
+ 4);
3739 Lisp_Object rest
, vector
;
3741 if (! menu_prompting
)
3744 /* Get the menu name from the first map that has one (a prompt string). */
3745 for (mapno
= 0; mapno
< nmaps
; mapno
++)
3747 name
= map_prompt (maps
[mapno
]);
3752 /* If we don't have any menus, just read a character normally. */
3756 /* Prompt string always starts with map's prompt, and a space. */
3757 strcpy (menu
, XSTRING (name
)->data
);
3758 nlength
= XSTRING (name
)->size
;
3759 menu
[nlength
++] = ':';
3760 menu
[nlength
++] = ' ';
3763 /* Start prompting at start of first map. */
3767 /* Present the documented bindings, a line at a time. */
3774 int orig_defn_macro
;
3776 /* Loop over elements of map. */
3781 /* If reached end of map, start at beginning of next map. */
3785 /* At end of last map, wrap around to first map if just starting,
3786 or end this line if already have something on it. */
3790 if (notfirst
|| nobindings
) break;
3795 /* Look at the next element of the map. */
3797 elt
= XVECTOR (vector
)->contents
[idx
];
3799 elt
= Fcar_safe (rest
);
3801 if (idx
< 0 && XTYPE (elt
) == Lisp_Vector
)
3803 /* If we found a dense table in the keymap,
3804 advanced past it, but start scanning its contents. */
3805 rest
= Fcdr_safe (rest
);
3811 /* An ordinary element. */
3813 s
= Fcar_safe (Fcdr_safe (elt
)); /* alist */
3815 s
= Fcar_safe(elt
); /* vector */
3816 if (XTYPE (s
) != Lisp_String
)
3817 /* Ignore the element if it has no prompt string. */
3819 /* If we have room for the prompt string, add it to this line.
3820 If this is the first on the line, always add it. */
3821 else if (XSTRING (s
)->size
+ i
+ 2 < width
3826 /* Punctuate between strings. */
3829 strcpy (menu
+ i
, ", ");
3835 /* Add as much of string as fits. */
3836 thiswidth
= XSTRING (s
)->size
;
3837 if (thiswidth
+ i
> width
)
3838 thiswidth
= width
- i
;
3839 bcopy (XSTRING (s
)->data
, menu
+ i
, thiswidth
);
3845 /* If this element does not fit, end the line now,
3846 and save the element for the next line. */
3847 strcpy (menu
+ i
, "...");
3851 /* Move past this element. */
3852 if (idx
>= 0 && idx
+ 1 >= XVECTOR (vector
)->size
)
3853 /* Handle reaching end of dense table. */
3858 rest
= Fcdr_safe (rest
);
3862 /* Prompt with that and read response. */
3865 /* Make believe its not a keyboard macro in case the help char
3866 is pressed. Help characters are not recorded because menu prompting
3867 is not used on replay.
3869 orig_defn_macro
= defining_kbd_macro
;
3870 defining_kbd_macro
= 0 ;
3871 obj
= read_char (commandflag
, 0, 0, Qnil
, 0);
3872 defining_kbd_macro
= orig_defn_macro
;
3874 if (XTYPE (obj
) != Lisp_Int
)
3879 if (! EQ (obj
, menu_prompt_more_char
)
3880 && (XTYPE (menu_prompt_more_char
) != Lisp_Int
3881 || ! EQ (obj
, make_number (Ctl (XINT (menu_prompt_more_char
))))))
3883 if ( defining_kbd_macro
)
3884 store_kbd_macro_char(obj
) ;
3887 /* Help char - go round again */
3891 /* Reading key sequences. */
3893 /* Follow KEY in the maps in CURRENT[0..NMAPS-1], placing its bindings
3894 in DEFS[0..NMAPS-1]. Set NEXT[i] to DEFS[i] if DEFS[i] is a
3895 keymap, or nil otherwise. Return the index of the first keymap in
3896 which KEY has any binding, or NMAPS if no map has a binding.
3898 If KEY is a meta ASCII character, treat it like meta-prefix-char
3899 followed by the corresponding non-meta character. Keymaps in
3900 CURRENT with non-prefix bindings for meta-prefix-char become nil in
3903 When KEY is not defined in any of the keymaps, if it is an upper
3904 case letter and there are bindings for the corresponding lower-case
3905 letter, return the bindings for the lower-case letter.
3906 We store 1 in *CASE_CONVERTED in this case.
3907 Otherwise, we don't change *CASE_CONVERTED.
3909 If KEY has no bindings in any of the CURRENT maps, NEXT is left
3912 NEXT may == CURRENT. */
3915 follow_key (key
, nmaps
, current
, defs
, next
, case_converted
)
3917 Lisp_Object
*current
, *defs
, *next
;
3919 int *case_converted
;
3921 int i
, first_binding
;
3923 /* If KEY is a meta ASCII character, treat it like meta-prefix-char
3924 followed by the corresponding non-meta character. */
3925 if (XTYPE (key
) == Lisp_Int
&& (XINT (key
) & CHAR_META
))
3927 for (i
= 0; i
< nmaps
; i
++)
3928 if (! NILP (current
[i
]))
3931 get_keyelt (access_keymap (current
[i
], meta_prefix_char
, 1, 0));
3933 /* Note that since we pass the resulting bindings through
3934 get_keymap_1, non-prefix bindings for meta-prefix-char
3936 next
[i
] = get_keymap_1 (next
[i
], 0, 1);
3942 XSET (key
, Lisp_Int
, XFASTINT (key
) & ~CHAR_META
);
3945 first_binding
= nmaps
;
3946 for (i
= nmaps
- 1; i
>= 0; i
--)
3948 if (! NILP (current
[i
]))
3950 defs
[i
] = get_keyelt (access_keymap (current
[i
], key
, 1, 0));
3951 if (! NILP (defs
[i
]))
3958 /* When KEY is not defined in any of the keymaps, if it is an upper
3959 case letter and there are bindings for the corresponding
3960 lower-case letter, return the bindings for the lower-case letter. */
3961 if (first_binding
== nmaps
3962 && XTYPE (key
) == Lisp_Int
3963 && ((((XINT (key
) & 0x3ffff)
3964 < XSTRING (current_buffer
->downcase_table
)->size
)
3965 && UPPERCASEP (XINT (key
) & 0x3ffff))
3966 || (XINT (key
) & shift_modifier
)))
3968 if (XINT (key
) & shift_modifier
)
3969 XSETINT (key
, XINT (key
) & ~shift_modifier
);
3971 XSETINT (key
, (DOWNCASE (XINT (key
) & 0x3ffff)
3972 | (XINT (key
) & ~0x3ffff)));
3974 first_binding
= nmaps
;
3975 for (i
= nmaps
- 1; i
>= 0; i
--)
3977 if (! NILP (current
[i
]))
3979 defs
[i
] = get_keyelt (access_keymap (current
[i
], key
, 1, 0));
3980 if (! NILP (defs
[i
]))
3986 if (first_binding
!= nmaps
)
3987 *case_converted
= 1;
3990 /* Given the set of bindings we've found, produce the next set of maps. */
3991 if (first_binding
< nmaps
)
3992 for (i
= 0; i
< nmaps
; i
++)
3993 next
[i
] = NILP (defs
[i
]) ? Qnil
: get_keymap_1 (defs
[i
], 0, 1);
3995 return first_binding
;
3998 /* Read a sequence of keys that ends with a non prefix character,
3999 storing it in KEYBUF, a buffer of size BUFSIZE.
4001 Return the length of the key sequence stored.
4002 Return -1 if the user rejected a command menu.
4004 Echo starting immediately unless `prompt' is 0.
4006 Where a key sequence ends depends on the currently active keymaps.
4007 These include any minor mode keymaps active in the current buffer,
4008 the current buffer's local map, and the global map.
4010 If a key sequence has no other bindings, we check Vfunction_key_map
4011 to see if some trailing subsequence might be the beginning of a
4012 function key's sequence. If so, we try to read the whole function
4013 key, and substitute its symbolic name into the key sequence.
4015 We ignore unbound `down-' mouse clicks. We turn unbound `drag-' and
4016 `double-' events into similar click events, if that would make them
4017 bound. We try to turn `triple-' events first into `double-' events,
4020 If we get a mouse click in a mode line, vertical divider, or other
4021 non-text area, we treat the click as if it were prefixed by the
4022 symbol denoting that area - `mode-line', `vertical-line', or
4025 If the sequence starts with a mouse click, we read the key sequence
4026 with respect to the buffer clicked on, not the current buffer.
4028 If the user switches frames in the midst of a key sequence, we put
4029 off the switch-frame event until later; the next call to
4030 read_char will return it. */
4033 read_key_sequence (keybuf
, bufsize
, prompt
)
4034 Lisp_Object
*keybuf
;
4038 int count
= specpdl_ptr
- specpdl
;
4040 /* How many keys there are in the current key sequence. */
4043 /* The length of the echo buffer when we started reading, and
4044 the length of this_command_keys when we started reading. */
4048 /* The number of keymaps we're scanning right now, and the number of
4049 keymaps we have allocated space for. */
4051 int nmaps_allocated
= 0;
4053 /* defs[0..nmaps-1] are the definitions of KEYBUF[0..t-1] in
4054 the current keymaps. */
4057 /* submaps[0..nmaps-1] are the prefix definitions of KEYBUF[0..t-1]
4058 in the current keymaps, or nil where it is not a prefix. */
4059 Lisp_Object
*submaps
;
4061 /* The index in defs[] of the first keymap that has a binding for
4062 this key sequence. In other words, the lowest i such that
4063 defs[i] is non-nil. */
4066 /* If t < mock_input, then KEYBUF[t] should be read as the next
4069 We use this to recover after recognizing a function key. Once we
4070 realize that a suffix of the current key sequence is actually a
4071 function key's escape sequence, we replace the suffix with the
4072 function key's binding from Vfunction_key_map. Now keybuf
4073 contains a new and different key sequence, so the echo area,
4074 this_command_keys, and the submaps and defs arrays are wrong. In
4075 this situation, we set mock_input to t, set t to 0, and jump to
4076 restart_sequence; the loop will read keys from keybuf up until
4077 mock_input, thus rebuilding the state; and then it will resume
4078 reading characters from the keyboard. */
4081 /* If the sequence is unbound in submaps[], then
4082 keybuf[fkey_start..fkey_end-1] is a prefix in Vfunction_key_map,
4083 and fkey_map is its binding.
4085 These might be > t, indicating that all function key scanning
4086 should hold off until t reaches them. We do this when we've just
4087 recognized a function key, to avoid searching for the function
4088 key's again in Vfunction_key_map. */
4089 int fkey_start
= 0, fkey_end
= 0;
4090 Lisp_Object fkey_map
;
4092 /* Likewise, for key_translation_map. */
4093 int keytran_start
= 0, keytran_end
= 0;
4094 Lisp_Object keytran_map
;
4096 /* If we receive a ``switch-frame'' event in the middle of a key sequence,
4097 we put it off for later. While we're reading, we keep the event here. */
4098 Lisp_Object delayed_switch_frame
;
4100 /* See the comment below... */
4101 #if defined (GOBBLE_FIRST_EVENT)
4102 Lisp_Object first_event
;
4105 struct buffer
*starting_buffer
;
4107 /* Nonzero if we found the binding for one of the chars
4108 in this key sequence by downcasing it. */
4109 int case_converted
= 0;
4111 /* Nonzero if we seem to have got the beginning of a binding
4112 in function_key_map. */
4113 int function_key_possible
= 0;
4117 last_nonmenu_event
= Qnil
;
4119 delayed_switch_frame
= Qnil
;
4120 fkey_map
= Vfunction_key_map
;
4121 keytran_map
= Vkey_translation_map
;
4123 /* If there is no function-key-map, turn off function key scanning. */
4124 if (NILP (Fkeymapp (Vfunction_key_map
)))
4125 fkey_start
= fkey_end
= bufsize
+ 1;
4127 /* If there is no key-translation-map, turn off scanning. */
4128 if (NILP (Fkeymapp (Vkey_translation_map
)))
4129 keytran_start
= keytran_end
= bufsize
+ 1;
4134 echo_prompt (XSTRING (prompt
)->data
);
4135 else if (cursor_in_echo_area
)
4136 /* This doesn't put in a dash if the echo buffer is empty, so
4137 you don't always see a dash hanging out in the minibuffer. */
4141 /* Record the initial state of the echo area and this_command_keys;
4142 we will need to restore them if we replay a key sequence. */
4144 echo_start
= echo_length ();
4145 keys_start
= this_command_key_count
;
4147 #if defined (GOBBLE_FIRST_EVENT)
4148 /* This doesn't quite work, because some of the things that read_char
4149 does cannot safely be bypassed. It seems too risky to try to make
4152 /* Read the first char of the sequence specially, before setting
4153 up any keymaps, in case a filter runs and switches buffers on us. */
4154 first_event
= read_char (NILP (prompt
), 0, submaps
, last_nonmenu_event
,
4156 #endif /* GOBBLE_FIRST_EVENT */
4158 /* We jump here when the key sequence has been thoroughly changed, and
4159 we need to rescan it starting from the beginning. When we jump here,
4160 keybuf[0..mock_input] holds the sequence we should reread. */
4163 starting_buffer
= current_buffer
;
4165 function_key_possible
= 0;
4167 /* Build our list of keymaps.
4168 If we recognize a function key and replace its escape sequence in
4169 keybuf with its symbol, or if the sequence starts with a mouse
4170 click and we need to switch buffers, we jump back here to rebuild
4171 the initial keymaps from the current buffer. */
4175 if (!NILP (Voverriding_local_map
))
4178 if (nmaps
> nmaps_allocated
)
4180 submaps
= (Lisp_Object
*) alloca (nmaps
* sizeof (submaps
[0]));
4181 defs
= (Lisp_Object
*) alloca (nmaps
* sizeof (defs
[0]));
4182 nmaps_allocated
= nmaps
;
4184 submaps
[0] = Voverriding_local_map
;
4188 nmaps
= current_minor_maps (0, &maps
) + 2;
4189 if (nmaps
> nmaps_allocated
)
4191 submaps
= (Lisp_Object
*) alloca (nmaps
* sizeof (submaps
[0]));
4192 defs
= (Lisp_Object
*) alloca (nmaps
* sizeof (defs
[0]));
4193 nmaps_allocated
= nmaps
;
4195 bcopy (maps
, submaps
, (nmaps
- 2) * sizeof (submaps
[0]));
4196 #ifdef USE_TEXT_PROPERTIES
4197 submaps
[nmaps
-2] = get_local_map (PT
, current_buffer
);
4199 submaps
[nmaps
-2] = current_buffer
->keymap
;
4202 submaps
[nmaps
-1] = current_global_map
;
4205 /* Find an accurate initial value for first_binding. */
4206 for (first_binding
= 0; first_binding
< nmaps
; first_binding
++)
4207 if (! NILP (submaps
[first_binding
]))
4210 /* Start from the beginning in keybuf. */
4213 /* These are no-ops the first time through, but if we restart, they
4214 revert the echo area and this_command_keys to their original state. */
4215 this_command_key_count
= keys_start
;
4216 if (INTERACTIVE
&& t
< mock_input
)
4217 echo_truncate (echo_start
);
4219 /* If the best binding for the current key sequence is a keymap, or
4220 we may be looking at a function key's escape sequence, keep on
4222 while ((first_binding
< nmaps
&& ! NILP (submaps
[first_binding
]))
4223 || (first_binding
>= nmaps
4225 /* mock input is never part of a function key's sequence. */
4226 && mock_input
<= fkey_start
)
4227 || (first_binding
>= nmaps
4228 && keytran_start
< t
4229 /* mock input is never part of a function key's sequence. */
4230 && mock_input
<= keytran_start
)
4231 /* Don't return in the middle of a possible function key sequence,
4232 if the only bindings we found were via case conversion.
4233 Thus, if ESC O a has a function-key-map translation
4234 and ESC o has a binding, don't return after ESC O,
4235 so that we can translate ESC O plus the next character. */
4236 || (function_key_possible
&& case_converted
))
4239 int used_mouse_menu
= 0;
4241 /* Where the last real key started. If we need to throw away a
4242 key that has expanded into more than one element of keybuf
4243 (say, a mouse click on the mode line which is being treated
4244 as [mode-line (mouse-...)], then we backtrack to this point
4246 int last_real_key_start
;
4248 /* These variables are analogous to echo_start and keys_start;
4249 while those allow us to restart the entire key sequence,
4250 echo_local_start and keys_local_start allow us to throw away
4252 int echo_local_start
, keys_local_start
, local_first_binding
;
4255 error ("key sequence too long");
4258 echo_local_start
= echo_length ();
4259 keys_local_start
= this_command_key_count
;
4260 local_first_binding
= first_binding
;
4263 /* These are no-ops, unless we throw away a keystroke below and
4264 jumped back up to replay_key; in that case, these restore the
4265 variables to their original state, allowing us to replay the
4267 if (INTERACTIVE
&& t
< mock_input
)
4268 echo_truncate (echo_local_start
);
4269 this_command_key_count
= keys_local_start
;
4270 first_binding
= local_first_binding
;
4272 /* By default, assume each event is "real". */
4273 last_real_key_start
= t
;
4275 /* Does mock_input indicate that we are re-reading a key sequence? */
4279 add_command_key (key
);
4283 /* If not, we should actually read a character. */
4286 struct buffer
*buf
= current_buffer
;
4288 key
= read_char (NILP (prompt
), nmaps
, submaps
, last_nonmenu_event
,
4291 /* read_char returns t when it shows a menu and the user rejects it.
4296 /* read_char returns -1 at the end of a macro.
4297 Emacs 18 handles this by returning immediately with a
4298 zero, so that's what we'll do. */
4299 if (XTYPE (key
) == Lisp_Int
&& XINT (key
) == -1)
4305 /* If we have a quit that was typed in another frame, and
4306 quit_throw_to_read_char switched buffers,
4307 replay to get the right keymap. */
4308 if (EQ (key
, quit_char
) && current_buffer
!= starting_buffer
)
4313 goto replay_sequence
;
4319 /* Clicks in non-text areas get prefixed by the symbol
4320 in their CHAR-ADDRESS field. For example, a click on
4321 the mode line is prefixed by the symbol `mode-line'.
4323 Furthermore, key sequences beginning with mouse clicks
4324 are read using the keymaps of the buffer clicked on, not
4325 the current buffer. So we may have to switch the buffer
4328 When we turn one event into two events, we must make sure
4329 that neither of the two looks like the original--so that,
4330 if we replay the events, they won't be expanded again.
4331 If not for this, such reexpansion could happen either here
4332 or when user programs play with this-command-keys. */
4333 if (EVENT_HAS_PARAMETERS (key
))
4335 Lisp_Object kind
= EVENT_HEAD_KIND (EVENT_HEAD (key
));
4337 if (EQ (kind
, Qmouse_click
))
4339 Lisp_Object window
= POSN_WINDOW (EVENT_START (key
));
4340 Lisp_Object posn
= POSN_BUFFER_POSN (EVENT_START (key
));
4342 if (XTYPE (posn
) == Lisp_Cons
)
4344 /* We're looking at the second event of a
4345 sequence which we expanded before. Set
4346 last_real_key_start appropriately. */
4348 last_real_key_start
= t
- 1;
4351 /* Key sequences beginning with mouse clicks are
4352 read using the keymaps in the buffer clicked on,
4353 not the current buffer. If we're at the
4354 beginning of a key sequence, switch buffers. */
4355 if (last_real_key_start
== 0
4356 && XTYPE (window
) == Lisp_Window
4357 && XTYPE (XWINDOW (window
)->buffer
) == Lisp_Buffer
4358 && XBUFFER (XWINDOW (window
)->buffer
) != current_buffer
)
4363 /* Arrange to go back to the original buffer once we're
4364 done reading the key sequence. Note that we can't
4365 use save_excursion_{save,restore} here, because they
4366 save point as well as the current buffer; we don't
4367 want to save point, because redisplay may change it,
4368 to accommodate a Fset_window_start or something. We
4369 don't want to do this at the top of the function,
4370 because we may get input from a subprocess which
4371 wants to change the selected window and stuff (say,
4373 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
4375 set_buffer_internal (XBUFFER (XWINDOW (window
)->buffer
));
4376 goto replay_sequence
;
4378 else if (XTYPE (posn
) == Lisp_Symbol
)
4380 /* Expand mode-line and scroll-bar events into two events:
4381 use posn as a fake prefix key. */
4383 if (t
+ 1 >= bufsize
)
4384 error ("key sequence too long");
4389 /* Zap the position in key, so we know that we've
4390 expanded it, and don't try to do so again. */
4391 POSN_BUFFER_POSN (EVENT_START (key
))
4392 = Fcons (posn
, Qnil
);
4396 else if (EQ (kind
, Qswitch_frame
))
4398 /* If we're at the beginning of a key sequence, go
4399 ahead and return this event. If we're in the
4400 midst of a key sequence, delay it until the end. */
4403 delayed_switch_frame
= key
;
4409 Lisp_Object posn
= POSN_BUFFER_POSN (EVENT_START (key
));
4411 /* Handle menu-bar events:
4412 insert the dummy prefix event `menu-bar'. */
4413 if (EQ (posn
, Qmenu_bar
))
4415 if (t
+ 1 >= bufsize
)
4416 error ("key sequence too long");
4417 /* Run the Lucid hook. */
4418 call1 (Vrun_hooks
, Qactivate_menubar_hook
);
4419 /* If it has changed current-menubar from previous value,
4420 really recompute the menubar from the value. */
4421 if (! NILP (Vlucid_menu_bar_dirty_flag
))
4422 call0 (Qrecompute_lucid_menubar
);
4426 /* Zap the position in key, so we know that we've
4427 expanded it, and don't try to do so again. */
4428 POSN_BUFFER_POSN (EVENT_START (key
))
4429 = Fcons (posn
, Qnil
);
4432 goto replay_sequence
;
4434 else if (XTYPE (posn
) == Lisp_Cons
)
4436 /* We're looking at the second event of a
4437 sequence which we expanded before. Set
4438 last_real_key_start appropriately. */
4439 if (last_real_key_start
== t
&& t
> 0)
4440 last_real_key_start
= t
- 1;
4445 /* We have finally decided that KEY is something we might want
4447 first_binding
= (follow_key (key
,
4448 nmaps
- first_binding
,
4449 submaps
+ first_binding
,
4450 defs
+ first_binding
,
4451 submaps
+ first_binding
,
4455 /* If KEY wasn't bound, we'll try some fallbacks. */
4456 if (first_binding
>= nmaps
)
4458 Lisp_Object head
= EVENT_HEAD (key
);
4460 if (EQ (head
, Vhelp_char
))
4462 read_key_sequence_cmd
= Vprefix_help_command
;
4464 last_nonmenu_event
= key
;
4468 if (XTYPE (head
) == Lisp_Symbol
)
4470 Lisp_Object breakdown
= parse_modifiers (head
);
4471 int modifiers
= XINT (XCONS (XCONS (breakdown
)->cdr
)->car
);
4473 /* Attempt to reduce an unbound mouse event to a simpler
4474 event that is bound:
4475 Drags reduce to clicks.
4476 Double-clicks reduce to clicks.
4477 Triple-clicks reduce to double-clicks, then to clicks.
4478 Down-clicks are eliminated.
4479 Double-downs reduce to downs, then are eliminated.
4480 Triple-downs reduce to double-downs, then to downs,
4481 then are eliminated. */
4482 if (modifiers
& (down_modifier
| drag_modifier
4483 | double_modifier
| triple_modifier
))
4485 while (modifiers
& (down_modifier
| drag_modifier
4486 | double_modifier
| triple_modifier
))
4488 Lisp_Object new_head
, new_click
;
4489 if (modifiers
& triple_modifier
)
4490 modifiers
^= (double_modifier
| triple_modifier
);
4491 else if (modifiers
& (drag_modifier
| double_modifier
))
4492 modifiers
&= ~(drag_modifier
| double_modifier
);
4495 /* Dispose of this `down' event by simply jumping
4496 back to replay_key, to get another event.
4498 Note that if this event came from mock input,
4499 then just jumping back to replay_key will just
4500 hand it to us again. So we have to wipe out any
4503 We could delete keybuf[t] and shift everything
4504 after that to the left by one spot, but we'd also
4505 have to fix up any variable that points into
4506 keybuf, and shifting isn't really necessary
4509 Adding prefixes for non-textual mouse clicks
4510 creates two characters of mock input, and both
4511 must be thrown away. If we're only looking at
4512 the prefix now, we can just jump back to
4513 replay_key. On the other hand, if we've already
4514 processed the prefix, and now the actual click
4515 itself is giving us trouble, then we've lost the
4516 state of the keymaps we want to backtrack to, and
4517 we need to replay the whole sequence to rebuild
4520 Beyond that, only function key expansion could
4521 create more than two keys, but that should never
4522 generate mouse events, so it's okay to zero
4523 mock_input in that case too.
4525 Isn't this just the most wonderful code ever? */
4526 if (t
== last_real_key_start
)
4533 mock_input
= last_real_key_start
;
4534 goto replay_sequence
;
4539 = apply_modifiers (modifiers
, XCONS (breakdown
)->car
);
4541 = Fcons (new_head
, Fcons (EVENT_START (key
), Qnil
));
4543 /* Look for a binding for this new key. follow_key
4544 promises that it didn't munge submaps the
4545 last time we called it, since key was unbound. */
4547 = (follow_key (new_click
,
4548 nmaps
- local_first_binding
,
4549 submaps
+ local_first_binding
,
4550 defs
+ local_first_binding
,
4551 submaps
+ local_first_binding
,
4553 + local_first_binding
);
4555 /* If that click is bound, go for it. */
4556 if (first_binding
< nmaps
)
4561 /* Otherwise, we'll leave key set to the drag event. */
4568 /* Normally, last_nonmenu_event gets the previous key we read.
4569 But when a mouse popup menu is being used,
4570 we don't update last_nonmenu_event; it continues to hold the mouse
4571 event that preceded the first level of menu. */
4572 if (!used_mouse_menu
)
4573 last_nonmenu_event
= key
;
4575 /* If the sequence is unbound, see if we can hang a function key
4576 off the end of it. We only want to scan real keyboard input
4577 for function key sequences, so if mock_input says that we're
4578 re-reading old events, don't examine it. */
4579 if ((first_binding
>= nmaps
|| case_converted
)
4582 Lisp_Object fkey_next
;
4584 /* Continue scan from fkey_end until we find a bound suffix.
4585 If we fail, increment fkey_start
4586 and start fkey_end from there. */
4587 while (fkey_end
< t
)
4591 key
= keybuf
[fkey_end
++];
4592 /* Look up meta-characters by prefixing them
4593 with meta_prefix_char. I hate this. */
4594 if (XTYPE (key
) == Lisp_Int
&& XINT (key
) & meta_modifier
)
4599 (access_keymap (fkey_map
, meta_prefix_char
, 1, 0)),
4601 XFASTINT (key
) = XFASTINT (key
) & ~meta_modifier
;
4604 fkey_next
= fkey_map
;
4607 = get_keyelt (access_keymap (fkey_next
, key
, 1, 0));
4609 /* If the function key map gives a function, not an
4610 array, then call the function with no args and use
4611 its value instead. */
4612 if (SYMBOLP (fkey_next
) && ! NILP (Ffboundp (fkey_next
))
4615 struct gcpro gcpro1
, gcpro2
, gcpro3
;
4619 GCPRO3 (fkey_map
, keytran_map
, delayed_switch_frame
);
4620 fkey_next
= call1 (fkey_next
, prompt
);
4622 /* If the function returned something invalid,
4623 barf--don't ignore it.
4624 (To ignore it safely, we would need to gcpro a bunch of
4625 other variables.) */
4626 if (! (VECTORP (fkey_next
) || STRINGP (fkey_next
)))
4627 error ("Function in function-key-map returns invalid key sequence");
4630 function_key_possible
= ! NILP (fkey_next
);
4632 /* If keybuf[fkey_start..fkey_end] is bound in the
4633 function key map and it's a suffix of the current
4634 sequence (i.e. fkey_end == t), replace it with
4635 the binding and restart with fkey_start at the end. */
4636 if ((VECTORP (fkey_next
) || STRINGP (fkey_next
))
4639 int len
= XFASTINT (Flength (fkey_next
));
4641 t
= fkey_start
+ len
;
4643 error ("key sequence too long");
4645 if (VECTORP (fkey_next
))
4646 bcopy (XVECTOR (fkey_next
)->contents
,
4647 keybuf
+ fkey_start
,
4648 (t
- fkey_start
) * sizeof (keybuf
[0]));
4649 else if (STRINGP (fkey_next
))
4653 for (i
= 0; i
< len
; i
++)
4654 XFASTINT (keybuf
[fkey_start
+ i
])
4655 = XSTRING (fkey_next
)->data
[i
];
4659 fkey_start
= fkey_end
= t
;
4660 fkey_map
= Vfunction_key_map
;
4662 goto replay_sequence
;
4665 fkey_map
= get_keymap_1 (fkey_next
, 0, 1);
4667 /* If we no longer have a bound suffix, try a new positions for
4669 if (NILP (fkey_map
))
4671 fkey_end
= ++fkey_start
;
4672 fkey_map
= Vfunction_key_map
;
4673 function_key_possible
= 0;
4678 /* Look for this sequence in key-translation-map. */
4680 Lisp_Object keytran_next
;
4682 /* Scan from keytran_end until we find a bound suffix. */
4683 while (keytran_end
< t
)
4687 key
= keybuf
[keytran_end
++];
4688 /* Look up meta-characters by prefixing them
4689 with meta_prefix_char. I hate this. */
4690 if (XTYPE (key
) == Lisp_Int
&& XINT (key
) & meta_modifier
)
4695 (access_keymap (keytran_map
, meta_prefix_char
, 1, 0)),
4697 XFASTINT (key
) = XFASTINT (key
) & ~meta_modifier
;
4700 keytran_next
= keytran_map
;
4703 = get_keyelt (access_keymap (keytran_next
, key
, 1, 0));
4705 /* If the key translation map gives a function, not an
4706 array, then call the function with no args and use
4707 its value instead. */
4708 if (SYMBOLP (keytran_next
) && ! NILP (Ffboundp (keytran_next
))
4709 && keytran_end
== t
)
4711 struct gcpro gcpro1
, gcpro2
, gcpro3
;
4715 GCPRO3 (fkey_map
, keytran_map
, delayed_switch_frame
);
4716 keytran_next
= call1 (keytran_next
, prompt
);
4718 /* If the function returned something invalid,
4719 barf--don't ignore it.
4720 (To ignore it safely, we would need to gcpro a bunch of
4721 other variables.) */
4722 if (! (VECTORP (keytran_next
) || STRINGP (keytran_next
)))
4723 error ("Function in key-translation-map returns invalid key sequence");
4726 /* If keybuf[keytran_start..keytran_end] is bound in the
4727 key translation map and it's a suffix of the current
4728 sequence (i.e. keytran_end == t), replace it with
4729 the binding and restart with keytran_start at the end. */
4730 if ((VECTORP (keytran_next
) || STRINGP (keytran_next
))
4731 && keytran_end
== t
)
4733 int len
= XFASTINT (Flength (keytran_next
));
4735 t
= keytran_start
+ len
;
4737 error ("key sequence too long");
4739 if (VECTORP (keytran_next
))
4740 bcopy (XVECTOR (keytran_next
)->contents
,
4741 keybuf
+ keytran_start
,
4742 (t
- keytran_start
) * sizeof (keybuf
[0]));
4743 else if (STRINGP (keytran_next
))
4747 for (i
= 0; i
< len
; i
++)
4748 XFASTINT (keybuf
[keytran_start
+ i
])
4749 = XSTRING (keytran_next
)->data
[i
];
4753 keytran_start
= keytran_end
= t
;
4754 keytran_map
= Vkey_translation_map
;
4756 goto replay_sequence
;
4759 keytran_map
= get_keymap_1 (keytran_next
, 0, 1);
4761 /* If we no longer have a bound suffix, try a new positions for
4763 if (NILP (keytran_map
))
4765 keytran_end
= ++keytran_start
;
4766 keytran_map
= Vkey_translation_map
;
4772 read_key_sequence_cmd
= (first_binding
< nmaps
4773 ? defs
[first_binding
]
4777 unread_switch_frame
= delayed_switch_frame
;
4778 unbind_to (count
, Qnil
);
4780 /* Occasionally we fabricate events, perhaps by expanding something
4781 according to function-key-map, or by adding a prefix symbol to a
4782 mouse click in the scroll bar or modeline. In this cases, return
4783 the entire generated key sequence, even if we hit an unbound
4784 prefix or a definition before the end. This means that you will
4785 be able to push back the event properly, and also means that
4786 read-key-sequence will always return a logical unit.
4789 for (; t
< mock_input
; t
++)
4791 echo_char (keybuf
[t
]);
4792 add_command_key (keybuf
[t
]);
4798 #if 0 /* This doc string is too long for some compilers.
4799 This commented-out definition serves for DOC. */
4800 DEFUN ("read-key-sequence", Fread_key_sequence
, Sread_key_sequence
, 1, 2, 0,
4801 "Read a sequence of keystrokes and return as a string or vector.\n\
4802 The sequence is sufficient to specify a non-prefix command in the\n\
4803 current local and global maps.\n\
4805 First arg PROMPT is a prompt string. If nil, do not prompt specially.\n\
4806 Second (optional) arg CONTINUE-ECHO, if non-nil, means this key echos\n\
4807 as a continuation of the previous key.\n\
4809 A C-g typed while in this function is treated like any other character,\n\
4810 and `quit-flag' is not set.\n\
4812 If the key sequence starts with a mouse click, then the sequence is read\n\
4813 using the keymaps of the buffer of the window clicked in, not the buffer\n\
4814 of the selected window as normal.\n\
4816 `read-key-sequence' drops unbound button-down events, since you normally\n\
4817 only care about the click or drag events which follow them. If a drag\n\
4818 or multi-click event is unbound, but the corresponding click event would\n\
4819 be bound, `read-key-sequence' turns the event into a click event at the\n\
4820 drag's starting position. This means that you don't have to distinguish\n\
4821 between click and drag, double, or triple events unless you want to.\n\
4823 `read-key-sequence' prefixes mouse events on mode lines, the vertical\n\
4824 lines separating windows, and scroll bars with imaginary keys\n\
4825 `mode-line', `vertical-line', and `vertical-scroll-bar'.\n\
4827 If the user switches frames in the middle of a key sequence, the\n\
4828 frame-switch event is put off until after the current key sequence.\n\
4830 `read-key-sequence' checks `function-key-map' for function key\n\
4831 sequences, where they wouldn't conflict with ordinary bindings. See\n\
4832 `function-key-map' for more details.")
4833 (prompt
, continue_echo
)
4836 DEFUN ("read-key-sequence", Fread_key_sequence
, Sread_key_sequence
, 1, 2, 0,
4838 (prompt
, continue_echo
)
4839 Lisp_Object prompt
, continue_echo
;
4841 Lisp_Object keybuf
[30];
4843 struct gcpro gcpro1
, gcpro2
;
4846 CHECK_STRING (prompt
, 0);
4849 bzero (keybuf
, sizeof keybuf
);
4851 gcpro1
.nvars
= (sizeof keybuf
/sizeof (keybuf
[0]));
4853 if (NILP (continue_echo
))
4854 this_command_key_count
= 0;
4856 i
= read_key_sequence (keybuf
, (sizeof keybuf
/sizeof (keybuf
[0])), prompt
);
4864 return make_event_array (i
, keybuf
);
4867 DEFUN ("command-execute", Fcommand_execute
, Scommand_execute
, 1, 2, 0,
4868 "Execute CMD as an editor command.\n\
4869 CMD must be a symbol that satisfies the `commandp' predicate.\n\
4870 Optional second arg RECORD-FLAG non-nil\n\
4871 means unconditionally put this command in `command-history'.\n\
4872 Otherwise, that is done only if an arg is read using the minibuffer.")
4874 Lisp_Object cmd
, record
;
4876 register Lisp_Object final
;
4877 register Lisp_Object tem
;
4878 Lisp_Object prefixarg
;
4879 struct backtrace backtrace
;
4880 extern int debug_on_next_call
;
4882 prefixarg
= Vprefix_arg
, Vprefix_arg
= Qnil
;
4883 Vcurrent_prefix_arg
= prefixarg
;
4884 debug_on_next_call
= 0;
4886 if (XTYPE (cmd
) == Lisp_Symbol
)
4888 tem
= Fget (cmd
, Qdisabled
);
4890 return call1 (Vrun_hooks
, Qdisabled_command_hook
);
4895 final
= Findirect_function (cmd
);
4897 if (CONSP (final
) && (tem
= Fcar (final
), EQ (tem
, Qautoload
)))
4898 do_autoload (final
, cmd
);
4903 if (XTYPE (final
) == Lisp_String
4904 || XTYPE (final
) == Lisp_Vector
)
4906 /* If requested, place the macro in the command history. For
4907 other sorts of commands, call-interactively takes care of
4911 = Fcons (Fcons (Qexecute_kbd_macro
,
4912 Fcons (final
, Fcons (prefixarg
, Qnil
))),
4915 return Fexecute_kbd_macro (final
, prefixarg
);
4917 if (CONSP (final
) || XTYPE (final
) == Lisp_Subr
4918 || XTYPE (final
) == Lisp_Compiled
)
4920 backtrace
.next
= backtrace_list
;
4921 backtrace_list
= &backtrace
;
4922 backtrace
.function
= &Qcall_interactively
;
4923 backtrace
.args
= &cmd
;
4924 backtrace
.nargs
= 1;
4925 backtrace
.evalargs
= 0;
4927 tem
= Fcall_interactively (cmd
, record
);
4929 backtrace_list
= backtrace
.next
;
4935 DEFUN ("execute-extended-command", Fexecute_extended_command
, Sexecute_extended_command
,
4937 "Read function name, then read its arguments and call it.")
4939 Lisp_Object prefixarg
;
4941 Lisp_Object function
;
4943 Lisp_Object saved_keys
;
4944 struct gcpro gcpro1
;
4946 saved_keys
= Fthis_command_keys ();
4948 GCPRO1 (saved_keys
);
4950 if (EQ (prefixarg
, Qminus
))
4952 else if (CONSP (prefixarg
) && XINT (XCONS (prefixarg
)->car
) == 4)
4953 strcpy (buf
, "C-u ");
4954 else if (CONSP (prefixarg
) && XTYPE (XCONS (prefixarg
)->car
) == Lisp_Int
)
4955 sprintf (buf
, "%d ", XINT (XCONS (prefixarg
)->car
));
4956 else if (XTYPE (prefixarg
) == Lisp_Int
)
4957 sprintf (buf
, "%d ", XINT (prefixarg
));
4959 /* This isn't strictly correct if execute-extended-command
4960 is bound to anything else. Perhaps it should use
4961 this_command_keys? */
4962 strcat (buf
, "M-x ");
4964 /* Prompt with buf, and then read a string, completing from and
4965 restricting to the set of all defined commands. Don't provide
4966 any initial input. Save the command read on the extended-command
4968 function
= Fcompleting_read (build_string (buf
),
4969 Vobarray
, Qcommandp
,
4970 Qt
, Qnil
, Qextended_command_history
);
4972 /* Set this_command_keys to the concatenation of saved_keys and
4973 function, followed by a RET. */
4975 struct Lisp_String
*str
;
4979 this_command_key_count
= 0;
4981 str
= XSTRING (saved_keys
);
4982 for (i
= 0; i
< str
->size
; i
++)
4984 XFASTINT (tem
) = str
->data
[i
];
4985 add_command_key (tem
);
4988 str
= XSTRING (function
);
4989 for (i
= 0; i
< str
->size
; i
++)
4991 XFASTINT (tem
) = str
->data
[i
];
4992 add_command_key (tem
);
4995 XFASTINT (tem
) = '\015';
4996 add_command_key (tem
);
5001 function
= Fintern (function
, Qnil
);
5002 Vprefix_arg
= prefixarg
;
5003 this_command
= function
;
5005 return Fcommand_execute (function
, Qt
);
5009 detect_input_pending ()
5012 get_input_pending (&input_pending
);
5014 return input_pending
;
5017 /* This is called in some cases before a possible quit.
5018 It cases the next call to detect_input_pending to recompute input_pending.
5019 So calling this function unnecessarily can't do any harm. */
5020 clear_input_pending ()
5025 DEFUN ("input-pending-p", Finput_pending_p
, Sinput_pending_p
, 0, 0, 0,
5026 "T if command input is currently available with no waiting.\n\
5027 Actually, the value is nil only if we can be sure that no input is available.")
5030 if (!NILP (unread_command_events
) || unread_command_char
!= -1)
5033 return detect_input_pending () ? Qt
: Qnil
;
5036 DEFUN ("recent-keys", Frecent_keys
, Srecent_keys
, 0, 0, 0,
5037 "Return vector of last 100 events, not counting those from keyboard macros.")
5040 Lisp_Object
*keys
= XVECTOR (recent_keys
)->contents
;
5043 if (total_keys
< NUM_RECENT_KEYS
)
5044 return Fvector (total_keys
, keys
);
5047 val
= Fvector (NUM_RECENT_KEYS
, keys
);
5048 bcopy (keys
+ recent_keys_index
,
5049 XVECTOR (val
)->contents
,
5050 (NUM_RECENT_KEYS
- recent_keys_index
) * sizeof (Lisp_Object
));
5052 XVECTOR (val
)->contents
+ NUM_RECENT_KEYS
- recent_keys_index
,
5053 recent_keys_index
* sizeof (Lisp_Object
));
5058 DEFUN ("this-command-keys", Fthis_command_keys
, Sthis_command_keys
, 0, 0, 0,
5059 "Return the key sequence that invoked this command.\n\
5060 The value is a string or a vector.")
5063 return make_event_array (this_command_key_count
,
5064 XVECTOR (this_command_keys
)->contents
);
5067 DEFUN ("recursion-depth", Frecursion_depth
, Srecursion_depth
, 0, 0, 0,
5068 "Return the current depth in recursive edits.")
5072 XFASTINT (temp
) = command_loop_level
+ minibuf_level
;
5076 DEFUN ("open-dribble-file", Fopen_dribble_file
, Sopen_dribble_file
, 1, 1,
5077 "FOpen dribble file: ",
5078 "Start writing all keyboard characters to a dribble file called FILE.\n\
5079 If FILE is nil, close any open dribble file.")
5090 file
= Fexpand_file_name (file
, Qnil
);
5091 dribble
= fopen (XSTRING (file
)->data
, "w");
5096 DEFUN ("discard-input", Fdiscard_input
, Sdiscard_input
, 0, 0, 0,
5097 "Discard the contents of the terminal input buffer.\n\
5098 Also cancel any kbd macro being defined.")
5101 defining_kbd_macro
= 0;
5102 update_mode_lines
++;
5104 unread_command_events
= Qnil
;
5105 unread_command_char
= -1;
5107 discard_tty_input ();
5109 /* Without the cast, GCC complains that this assignment loses the
5110 volatile qualifier of kbd_store_ptr. Is there anything wrong
5112 kbd_fetch_ptr
= (struct input_event
*) kbd_store_ptr
;
5113 Ffillarray (kbd_buffer_frame_or_window
, Qnil
);
5119 DEFUN ("suspend-emacs", Fsuspend_emacs
, Ssuspend_emacs
, 0, 1, "",
5120 "Stop Emacs and return to superior process. You can resume later.\n\
5121 On systems that don't have job control, run a subshell instead.\n\n\
5122 If optional arg STUFFSTRING is non-nil, its characters are stuffed\n\
5123 to be read as terminal input by Emacs's parent, after suspension.\n\
5125 Before suspending, call the functions in `suspend-hook' with no args.\n\
5126 If any of them returns nil, don't call the rest and don't suspend.\n\
5127 Otherwise, suspend normally and after resumption run the normal hook\n\
5128 `suspend-resume-hook' if that is bound and non-nil.\n\
5130 Some operating systems cannot stop the Emacs process and resume it later.\n\
5131 On such systems, Emacs starts a subshell instead of suspending.")
5133 Lisp_Object stuffstring
;
5136 int count
= specpdl_ptr
- specpdl
;
5137 int old_height
, old_width
;
5139 struct gcpro gcpro1
, gcpro2
;
5140 extern init_sys_modes ();
5142 if (!NILP (stuffstring
))
5143 CHECK_STRING (stuffstring
, 0);
5145 /* Run the functions in suspend-hook. */
5146 if (!NILP (Vrun_hooks
))
5147 call1 (Vrun_hooks
, intern ("suspend-hook"));
5149 GCPRO1 (stuffstring
);
5150 get_frame_size (&old_width
, &old_height
);
5152 /* sys_suspend can get an error if it tries to fork a subshell
5153 and the system resources aren't available for that. */
5154 record_unwind_protect (init_sys_modes
, 0);
5155 stuff_buffered_input (stuffstring
);
5157 unbind_to (count
, Qnil
);
5159 /* Check if terminal/window size has changed.
5160 Note that this is not useful when we are running directly
5161 with a window system; but suspend should be disabled in that case. */
5162 get_frame_size (&width
, &height
);
5163 if (width
!= old_width
|| height
!= old_height
)
5164 change_frame_size (selected_frame
, height
, width
, 0, 0);
5166 /* Run suspend-resume-hook. */
5167 if (!NILP (Vrun_hooks
))
5168 call1 (Vrun_hooks
, intern ("suspend-resume-hook"));
5174 /* If STUFFSTRING is a string, stuff its contents as pending terminal input.
5175 Then in any case stuff anything Emacs has read ahead and not used. */
5177 stuff_buffered_input (stuffstring
)
5178 Lisp_Object stuffstring
;
5180 register unsigned char *p
;
5182 /* stuff_char works only in BSD, versions 4.2 and up. */
5185 if (XTYPE (stuffstring
) == Lisp_String
)
5189 p
= XSTRING (stuffstring
)->data
;
5190 count
= XSTRING (stuffstring
)->size
;
5195 /* Anything we have read ahead, put back for the shell to read. */
5196 while (kbd_fetch_ptr
!= kbd_store_ptr
)
5198 if (kbd_fetch_ptr
== kbd_buffer
+ KBD_BUFFER_SIZE
)
5199 kbd_fetch_ptr
= kbd_buffer
;
5200 if (kbd_fetch_ptr
->kind
== ascii_keystroke
)
5201 stuff_char (kbd_fetch_ptr
->code
);
5202 kbd_fetch_ptr
->kind
= no_event
;
5203 (XVECTOR (kbd_buffer_frame_or_window
)->contents
[kbd_fetch_ptr
5210 #endif /* BSD and not BSD4_1 */
5213 set_waiting_for_input (time_to_clear
)
5214 EMACS_TIME
*time_to_clear
;
5216 input_available_clear_time
= time_to_clear
;
5218 /* Tell interrupt_signal to throw back to read_char, */
5219 waiting_for_input
= 1;
5221 /* If interrupt_signal was called before and buffered a C-g,
5222 make it run again now, to avoid timing error. */
5223 if (!NILP (Vquit_flag
))
5224 quit_throw_to_read_char ();
5227 clear_waiting_for_input ()
5229 /* Tell interrupt_signal not to throw back to read_char, */
5230 waiting_for_input
= 0;
5231 input_available_clear_time
= 0;
5234 /* This routine is called at interrupt level in response to C-G.
5235 If interrupt_input, this is the handler for SIGINT.
5236 Otherwise, it is called from kbd_buffer_store_event,
5237 in handling SIGIO or SIGTINT.
5239 If `waiting_for_input' is non zero, then unless `echoing' is nonzero,
5240 immediately throw back to read_char.
5242 Otherwise it sets the Lisp variable quit-flag not-nil.
5243 This causes eval to throw, when it gets a chance.
5244 If quit-flag is already non-nil, it stops the job right away. */
5250 /* Must preserve main program's value of errno. */
5251 int old_errno
= errno
;
5254 /* USG systems forget handlers when they are used;
5255 must reestablish each time */
5256 signal (SIGINT
, interrupt_signal
);
5257 signal (SIGQUIT
, interrupt_signal
);
5262 if (!NILP (Vquit_flag
) && FRAME_TERMCAP_P (selected_frame
))
5267 #ifdef SIGTSTP /* Support possible in later USG versions */
5269 * On systems which can suspend the current process and return to the original
5270 * shell, this command causes the user to end up back at the shell.
5271 * The "Auto-save" and "Abort" questions are not asked until
5272 * the user elects to return to emacs, at which point he can save the current
5273 * job and either dump core or continue.
5278 if (sys_suspend () == -1)
5280 printf ("Not running as a subprocess;\n");
5281 printf ("you can continue or abort.\n");
5284 /* Perhaps should really fork an inferior shell?
5285 But that would not provide any way to get back
5286 to the original shell, ever. */
5287 printf ("No support for stopping a process on this operating system;\n");
5288 printf ("you can continue or abort.\n");
5289 #endif /* not VMS */
5290 #endif /* not SIGTSTP */
5292 /* We must remain inside the screen area when the internal terminal
5293 is used. Note that [Enter] is not echoed by dos. */
5296 printf ("Auto-save? (y or n) ");
5298 if (((c
= getchar ()) & ~040) == 'Y')
5300 Fdo_auto_save (Qt
, Qnil
);
5302 printf ("\r\nAuto-save done");
5303 #else /* not MSDOS */
5304 printf ("Auto-save done\n");
5305 #endif /* not MSDOS */
5307 while (c
!= '\n') c
= getchar ();
5309 printf ("\r\nAbort? (y or n) ");
5310 #else /* not MSDOS */
5312 printf ("Abort (and enter debugger)? (y or n) ");
5314 printf ("Abort (and dump core)? (y or n) ");
5315 #endif /* not VMS */
5316 #endif /* not MSDOS */
5318 if (((c
= getchar ()) & ~040) == 'Y')
5320 while (c
!= '\n') c
= getchar ();
5322 printf ("\r\nContinuing...\r\n");
5323 #else /* not MSDOS */
5324 printf ("Continuing...\n");
5325 #endif /* not MSDOS */
5331 /* If executing a function that wants to be interrupted out of
5332 and the user has not deferred quitting by binding `inhibit-quit'
5333 then quit right away. */
5334 if (immediate_quit
&& NILP (Vinhibit_quit
))
5338 Fsignal (Qquit
, Qnil
);
5341 /* Else request quit when it's safe */
5345 if (waiting_for_input
&& !echoing
)
5346 quit_throw_to_read_char ();
5351 /* Handle a C-g by making read_char return C-g. */
5353 quit_throw_to_read_char ()
5355 quit_error_check ();
5357 /* Prevent another signal from doing this before we finish. */
5358 clear_waiting_for_input ();
5361 unread_command_events
= Qnil
;
5362 unread_command_char
= -1;
5364 #ifdef POLL_FOR_INPUT
5365 /* May be > 1 if in recursive minibuffer. */
5366 if (poll_suppress_count
== 0)
5370 if (XTYPE (internal_last_event_frame
) == Lisp_Frame
5371 && XFRAME (internal_last_event_frame
) != selected_frame
)
5372 Fhandle_switch_frame (make_lispy_switch_frame (internal_last_event_frame
));
5375 _longjmp (getcjmp
, 1);
5378 DEFUN ("set-input-mode", Fset_input_mode
, Sset_input_mode
, 3, 4, 0,
5379 "Set mode of reading keyboard input.\n\
5380 First arg INTERRUPT non-nil means use input interrupts;\n\
5381 nil means use CBREAK mode.\n\
5382 Second arg FLOW non-nil means use ^S/^Q flow control for output to terminal\n\
5383 (no effect except in CBREAK mode).\n\
5384 Third arg META t means accept 8-bit input (for a Meta key).\n\
5385 META nil means ignore the top bit, on the assumption it is parity.\n\
5386 Otherwise, accept 8-bit input and don't use the top bit for Meta.\n\
5387 Optional fourth arg QUIT if non-nil specifies character to use for quitting.\n\
5388 See also `current-input-mode'.")
5389 (interrupt
, flow
, meta
, quit
)
5390 Lisp_Object interrupt
, flow
, meta
, quit
;
5393 && (XTYPE (quit
) != Lisp_Int
5394 || XINT (quit
) < 0 || XINT (quit
) > 0400))
5395 error ("set-input-mode: QUIT must be an ASCII character");
5397 #ifdef POLL_FOR_INPUT
5403 /* Note SIGIO has been undef'd if FIONREAD is missing. */
5404 #ifdef NO_SOCK_SIGIO
5405 if (read_socket_hook
)
5406 interrupt_input
= 0; /* No interrupts if reading from a socket. */
5408 #endif /* NO_SOCK_SIGIO */
5409 interrupt_input
= !NILP (interrupt
);
5410 #else /* not SIGIO */
5411 interrupt_input
= 0;
5412 #endif /* not SIGIO */
5413 /* Our VMS input only works by interrupts, as of now. */
5415 interrupt_input
= 1;
5417 flow_control
= !NILP (flow
);
5420 else if (EQ (meta
, Qt
))
5425 /* Don't let this value be out of range. */
5426 quit_char
= XINT (quit
) & (meta_key
? 0377 : 0177);
5430 #ifdef POLL_FOR_INPUT
5431 poll_suppress_count
= 1;
5437 DEFUN ("current-input-mode", Fcurrent_input_mode
, Scurrent_input_mode
, 0, 0, 0,
5438 "Return information about the way Emacs currently reads keyboard input.\n\
5439 The value is a list of the form (INTERRUPT FLOW META QUIT), where\n\
5440 INTERRUPT is non-nil if Emacs is using interrupt-driven input; if\n\
5441 nil, Emacs is using CBREAK mode.\n\
5442 FLOW is non-nil if Emacs uses ^S/^Q flow control for output to the\n\
5443 terminal; this does not apply if Emacs uses interrupt-driven input.\n\
5444 META is t if accepting 8-bit input with 8th bit as Meta flag.\n\
5445 META nil means ignoring the top bit, on the assumption it is parity.\n\
5446 META is neither t nor nil if accepting 8-bit input and using\n\
5447 all 8 bits as the character code.\n\
5448 QUIT is the character Emacs currently uses to quit.\n\
5449 The elements of this list correspond to the arguments of\n\
5455 val
[0] = interrupt_input
? Qt
: Qnil
;
5456 val
[1] = flow_control
? Qt
: Qnil
;
5457 val
[2] = meta_key
== 2 ? make_number (0) : meta_key
== 1 ? Qt
: Qnil
;
5458 XFASTINT (val
[3]) = quit_char
;
5460 return Flist (sizeof (val
) / sizeof (val
[0]), val
);
5466 /* This is correct before outermost invocation of the editor loop */
5467 command_loop_level
= -1;
5469 quit_char
= Ctl ('g');
5470 unread_command_events
= Qnil
;
5471 unread_command_char
= -1;
5473 recent_keys_index
= 0;
5474 kbd_fetch_ptr
= kbd_buffer
;
5475 kbd_store_ptr
= kbd_buffer
;
5476 do_mouse_tracking
= 0;
5480 /* This means that command_loop_1 won't try to select anything the first
5482 internal_last_event_frame
= Qnil
;
5483 Vlast_event_frame
= internal_last_event_frame
;
5486 /* If we're running a dumped Emacs, we need to clear out
5487 kbd_buffer_frame_or_window, in case some events got into it
5490 If we're running an undumped Emacs, it hasn't been initialized by
5491 syms_of_keyboard yet. */
5493 Ffillarray (kbd_buffer_frame_or_window
, Qnil
);
5495 if (!noninteractive
)
5497 signal (SIGINT
, interrupt_signal
);
5498 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
5499 /* For systems with SysV TERMIO, C-g is set up for both SIGINT and
5500 SIGQUIT and we can't tell which one it will give us. */
5501 signal (SIGQUIT
, interrupt_signal
);
5502 #endif /* HAVE_TERMIO */
5503 /* Note SIGIO has been undef'd if FIONREAD is missing. */
5505 signal (SIGIO
, input_available_signal
);
5509 /* Use interrupt input by default, if it works and noninterrupt input
5510 has deficiencies. */
5512 #ifdef INTERRUPT_INPUT
5513 interrupt_input
= 1;
5515 interrupt_input
= 0;
5518 /* Our VMS input only works by interrupts, as of now. */
5520 interrupt_input
= 1;
5526 if (keyboard_init_hook
)
5527 (*keyboard_init_hook
) ();
5529 #ifdef POLL_FOR_INPUT
5530 poll_suppress_count
= 1;
5535 /* This type's only use is in syms_of_keyboard, to initialize the
5536 event header symbols and put properties on them. */
5543 struct event_head head_table
[] = {
5544 &Qmouse_movement
, "mouse-movement", &Qmouse_movement
,
5545 &Qscroll_bar_movement
, "scroll-bar-movement", &Qmouse_movement
,
5546 &Qswitch_frame
, "switch-frame", &Qswitch_frame
,
5551 Qdisabled_command_hook
= intern ("disabled-command-hook");
5552 staticpro (&Qdisabled_command_hook
);
5554 Qself_insert_command
= intern ("self-insert-command");
5555 staticpro (&Qself_insert_command
);
5557 Qforward_char
= intern ("forward-char");
5558 staticpro (&Qforward_char
);
5560 Qbackward_char
= intern ("backward-char");
5561 staticpro (&Qbackward_char
);
5563 Qdisabled
= intern ("disabled");
5564 staticpro (&Qdisabled
);
5566 Qundefined
= intern ("undefined");
5567 staticpro (&Qundefined
);
5569 Qpre_command_hook
= intern ("pre-command-hook");
5570 staticpro (&Qpre_command_hook
);
5572 Qpost_command_hook
= intern ("post-command-hook");
5573 staticpro (&Qpost_command_hook
);
5575 Qcommand_hook_internal
= intern ("command-hook-internal");
5576 staticpro (&Qcommand_hook_internal
);
5578 Qfunction_key
= intern ("function-key");
5579 staticpro (&Qfunction_key
);
5580 Qmouse_click
= intern ("mouse-click");
5581 staticpro (&Qmouse_click
);
5583 Qmenu_enable
= intern ("menu-enable");
5584 staticpro (&Qmenu_enable
);
5586 Qmode_line
= intern ("mode-line");
5587 staticpro (&Qmode_line
);
5588 Qvertical_line
= intern ("vertical-line");
5589 staticpro (&Qvertical_line
);
5590 Qvertical_scroll_bar
= intern ("vertical-scroll-bar");
5591 staticpro (&Qvertical_scroll_bar
);
5592 Qmenu_bar
= intern ("menu-bar");
5593 staticpro (&Qmenu_bar
);
5595 Qabove_handle
= intern ("above-handle");
5596 staticpro (&Qabove_handle
);
5597 Qhandle
= intern ("handle");
5598 staticpro (&Qhandle
);
5599 Qbelow_handle
= intern ("below-handle");
5600 staticpro (&Qbelow_handle
);
5602 Qevent_kind
= intern ("event-kind");
5603 staticpro (&Qevent_kind
);
5604 Qevent_symbol_elements
= intern ("event-symbol-elements");
5605 staticpro (&Qevent_symbol_elements
);
5606 Qevent_symbol_element_mask
= intern ("event-symbol-element-mask");
5607 staticpro (&Qevent_symbol_element_mask
);
5608 Qmodifier_cache
= intern ("modifier-cache");
5609 staticpro (&Qmodifier_cache
);
5611 Qrecompute_lucid_menubar
= intern ("recompute-lucid-menubar");
5612 staticpro (&Qrecompute_lucid_menubar
);
5613 Qactivate_menubar_hook
= intern ("activate-menubar-hook");
5614 staticpro (&Qactivate_menubar_hook
);
5617 struct event_head
*p
;
5619 for (p
= head_table
;
5620 p
< head_table
+ (sizeof (head_table
) / sizeof (head_table
[0]));
5623 *p
->var
= intern (p
->name
);
5625 Fput (*p
->var
, Qevent_kind
, *p
->kind
);
5626 Fput (*p
->var
, Qevent_symbol_elements
, Fcons (*p
->var
, Qnil
));
5630 button_down_location
= Fmake_vector (make_number (NUM_MOUSE_BUTTONS
), Qnil
);
5631 staticpro (&button_down_location
);
5635 int len
= sizeof (modifier_names
) / sizeof (modifier_names
[0]);
5637 modifier_symbols
= Fmake_vector (make_number (len
), Qnil
);
5638 for (i
= 0; i
< len
; i
++)
5639 if (modifier_names
[i
])
5640 XVECTOR (modifier_symbols
)->contents
[i
] = intern (modifier_names
[i
]);
5641 staticpro (&modifier_symbols
);
5644 recent_keys
= Fmake_vector (make_number (NUM_RECENT_KEYS
), Qnil
);
5645 staticpro (&recent_keys
);
5647 this_command_keys
= Fmake_vector (make_number (40), Qnil
);
5648 staticpro (&this_command_keys
);
5650 Qextended_command_history
= intern ("extended-command-history");
5651 Fset (Qextended_command_history
, Qnil
);
5652 staticpro (&Qextended_command_history
);
5654 kbd_buffer_frame_or_window
5655 = Fmake_vector (make_number (KBD_BUFFER_SIZE
), Qnil
);
5656 staticpro (&kbd_buffer_frame_or_window
);
5658 func_key_syms
= Qnil
;
5659 staticpro (&func_key_syms
);
5662 staticpro (&mouse_syms
);
5664 unread_switch_frame
= Qnil
;
5665 staticpro (&unread_switch_frame
);
5667 defsubr (&Sread_key_sequence
);
5668 defsubr (&Srecursive_edit
);
5669 defsubr (&Strack_mouse
);
5670 defsubr (&Sinput_pending_p
);
5671 defsubr (&Scommand_execute
);
5672 defsubr (&Srecent_keys
);
5673 defsubr (&Sthis_command_keys
);
5674 defsubr (&Ssuspend_emacs
);
5675 defsubr (&Sabort_recursive_edit
);
5676 defsubr (&Sexit_recursive_edit
);
5677 defsubr (&Srecursion_depth
);
5678 defsubr (&Stop_level
);
5679 defsubr (&Sdiscard_input
);
5680 defsubr (&Sopen_dribble_file
);
5681 defsubr (&Sset_input_mode
);
5682 defsubr (&Scurrent_input_mode
);
5683 defsubr (&Sexecute_extended_command
);
5685 DEFVAR_LISP ("last-command-char", &last_command_char
,
5686 "Last input event that was part of a command.");
5688 DEFVAR_LISP ("last-command-event", &last_command_char
,
5689 "Last input event that was part of a command.");
5691 DEFVAR_LISP ("last-nonmenu-event", &last_nonmenu_event
,
5692 "Last input event in a command, except for mouse menu events.\n\
5693 Mouse menus give back keys that don't look like mouse events;\n\
5694 this variable holds the actual mouse event that led to the menu,\n\
5695 so that you can determine whether the command was run by mouse or not.");
5697 DEFVAR_LISP ("last-input-char", &last_input_char
,
5698 "Last input event.");
5700 DEFVAR_LISP ("last-input-event", &last_input_char
,
5701 "Last input event.");
5703 DEFVAR_LISP ("unread-command-events", &unread_command_events
,
5704 "List of objects to be read as next command input events.");
5706 DEFVAR_INT ("unread-command-char", &unread_command_char
,
5707 "If not -1, an object to be read as next command input event.");
5709 DEFVAR_LISP ("meta-prefix-char", &meta_prefix_char
,
5710 "Meta-prefix character code. Meta-foo as command input\n\
5711 turns into this character followed by foo.");
5712 XSET (meta_prefix_char
, Lisp_Int
, 033);
5714 DEFVAR_LISP ("last-command", &last_command
,
5715 "The last command executed. Normally a symbol with a function definition,\n\
5716 but can be whatever was found in the keymap, or whatever the variable\n\
5717 `this-command' was set to by that command.");
5718 last_command
= Qnil
;
5720 DEFVAR_LISP ("this-command", &this_command
,
5721 "The command now being executed.\n\
5722 The command can set this variable; whatever is put here\n\
5723 will be in `last-command' during the following command.");
5724 this_command
= Qnil
;
5726 DEFVAR_INT ("auto-save-interval", &auto_save_interval
,
5727 "*Number of keyboard input characters between auto-saves.\n\
5728 Zero means disable autosaving due to number of characters typed.");
5729 auto_save_interval
= 300;
5731 DEFVAR_LISP ("auto-save-timeout", &Vauto_save_timeout
,
5732 "*Number of seconds idle time before auto-save.\n\
5733 Zero or nil means disable auto-saving due to idleness.\n\
5734 After auto-saving due to this many seconds of idle time,\n\
5735 Emacs also does a garbage collection if that seems to be warranted.");
5736 XFASTINT (Vauto_save_timeout
) = 30;
5738 DEFVAR_INT ("echo-keystrokes", &echo_keystrokes
,
5739 "*Nonzero means echo unfinished commands after this many seconds of pause.");
5740 echo_keystrokes
= 1;
5742 DEFVAR_INT ("polling-period", &polling_period
,
5743 "*Interval between polling for input during Lisp execution.\n\
5744 The reason for polling is to make C-g work to stop a running program.\n\
5745 Polling is needed only when using X windows and SIGIO does not work.\n\
5746 Polling is automatically disabled in all other cases.");
5749 DEFVAR_LISP ("double-click-time", &Vdouble_click_time
,
5750 "*Maximum time between mouse clicks to make a double-click.\n\
5751 Measured in milliseconds. nil means disable double-click recognition;\n\
5752 t means double-clicks have no time limit and are detected\n\
5753 by position only.");
5754 Vdouble_click_time
= make_number (500);
5756 DEFVAR_INT ("num-input-keys", &num_input_keys
,
5757 "*Number of complete keys read from the keyboard so far.");
5761 DEFVAR_LISP ("last-event-frame", &Vlast_event_frame
,
5762 "*The frame in which the most recently read event occurred.\n\
5763 If the last event came from a keyboard macro, this is set to `macro'.");
5764 Vlast_event_frame
= Qnil
;
5767 DEFVAR_LISP ("help-char", &Vhelp_char
,
5768 "Character to recognize as meaning Help.\n\
5769 When it is read, do `(eval help-form)', and display result if it's a string.\n\
5770 If the value of `help-form' is nil, this char can be read normally.");
5771 XSET (Vhelp_char
, Lisp_Int
, Ctl ('H'));
5773 DEFVAR_LISP ("help-form", &Vhelp_form
,
5774 "Form to execute when character `help-char' is read.\n\
5775 If the form returns a string, that string is displayed.\n\
5776 If `help-form' is nil, the help char is not recognized.");
5779 DEFVAR_LISP ("prefix-help-command", &Vprefix_help_command
,
5780 "Command to run when `help-char' character follows a prefix key.\n\
5781 This command is used only when there is no actual binding\n\
5782 for that character after that prefix key.");
5783 Vprefix_help_command
= Qnil
;
5785 DEFVAR_LISP ("top-level", &Vtop_level
,
5786 "Form to evaluate when Emacs starts up.\n\
5787 Useful to set before you dump a modified Emacs.");
5790 DEFVAR_LISP ("keyboard-translate-table", &Vkeyboard_translate_table
,
5791 "String used as translate table for keyboard input, or nil.\n\
5792 Each character is looked up in this string and the contents used instead.\n\
5793 If string is of length N, character codes N and up are untranslated.");
5794 Vkeyboard_translate_table
= Qnil
;
5796 DEFVAR_LISP ("key-translation-map", &Vkey_translation_map
,
5797 "Keymap of key translations that can override keymaps.\n\
5798 This keymap works like `function-key-map', but comes after that,\n\
5799 and applies even for keys that have ordinary bindings.");
5800 Vkey_translation_map
= Qnil
;
5802 DEFVAR_BOOL ("menu-prompting", &menu_prompting
,
5803 "Non-nil means prompt with menus when appropriate.\n\
5804 This is done when reading from a keymap that has a prompt string,\n\
5805 for elements that have prompt strings.\n\
5806 The menu is displayed on the screen\n\
5807 if X menus were enabled at configuration\n\
5808 time and the previous event was a mouse click prefix key.\n\
5809 Otherwise, menu prompting uses the echo area.");
5812 DEFVAR_LISP ("menu-prompt-more-char", &menu_prompt_more_char
,
5813 "Character to see next line of menu prompt.\n\
5814 Type this character while in a menu prompt to rotate around the lines of it.");
5815 XSET (menu_prompt_more_char
, Lisp_Int
, ' ');
5817 DEFVAR_INT ("extra-keyboard-modifiers", &extra_keyboard_modifiers
,
5818 "A mask of additional modifier keys to use with every keyboard character.\n\
5819 Emacs applies the modifiers of the character stored here to each keyboard\n\
5820 character it reads. For example, after evaluating the expression\n\
5821 (setq extra-keyboard-modifiers ?\C-x)\n\
5822 all input characters will have the control modifier applied to them.\n\
5824 Note that the character ?\C-@, equivalent to the integer zero, does\n\
5825 not count as a control character; rather, it counts as a character\n\
5826 with no modifiers; thus, setting `extra-keyboard-modifiers' to zero\n\
5827 cancels any modification.");
5828 extra_keyboard_modifiers
= 0;
5830 DEFVAR_LISP ("deactivate-mark", &Vdeactivate_mark
,
5831 "If an editing command sets this to t, deactivate the mark afterward.\n\
5832 The command loop sets this to nil before each command,\n\
5833 and tests the value when the command returns.\n\
5834 Buffer modification stores t in this variable.");
5835 Vdeactivate_mark
= Qnil
;
5837 DEFVAR_LISP ("pre-command-hook", &Vpre_command_hook
,
5838 "Normal hook run before each command is executed.");
5839 Vpre_command_hook
= Qnil
;
5841 DEFVAR_LISP ("post-command-hook", &Vpost_command_hook
,
5842 "Normal hook run after each command is executed.");
5843 Vpost_command_hook
= Qnil
;
5845 DEFVAR_LISP ("lucid-menu-bar-dirty-flag", &Vlucid_menu_bar_dirty_flag
,
5846 "t means menu bar, specified Lucid style, needs to be recomputed.");
5847 Vlucid_menu_bar_dirty_flag
= Qnil
;
5849 DEFVAR_LISP ("menu-bar-final-items", &Vmenu_bar_final_items
,
5850 "List of menu bar items to move to the end of the menu bar.\n\
5851 The elements of the list are event types that may have menu bar bindings.");
5852 Vmenu_bar_final_items
= Qnil
;
5854 DEFVAR_LISP ("overriding-local-map", &Voverriding_local_map
,
5855 "Keymap that overrides all other local keymaps.\n\
5856 If this variable is non-nil, it is used as a keymap instead of the\n\
5857 buffer's local map, and the minor mode keymaps and text property keymaps.");
5858 Voverriding_local_map
= Qnil
;
5860 DEFVAR_BOOL ("track-mouse", &do_mouse_tracking
,
5861 "*Non-nil means generate motion events for mouse motion.");
5863 DEFVAR_LISP ("vendor-key-alist", &Vvendor_key_alist
,
5864 "Alist of vendor-specific X windows key symbols.\n\
5865 Each element should have the form (N . SYMBOL) where N is the\n\
5866 numeric keysym code (sans the \"vendor-specific\" bit 1<<28)\n\
5867 and SYMBOL is its name.");
5868 Vmenu_bar_final_items
= Qnil
;
5873 initial_define_key (global_map
, Ctl ('Z'), "suspend-emacs");
5874 initial_define_key (control_x_map
, Ctl ('Z'), "suspend-emacs");
5875 initial_define_key (meta_map
, Ctl ('C'), "exit-recursive-edit");
5876 initial_define_key (global_map
, Ctl (']'), "abort-recursive-edit");
5877 initial_define_key (meta_map
, 'x', "execute-extended-command");