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
,
3590 menu_bar_item (key
, item_string
, def
, result
)
3591 Lisp_Object key
, item_string
, def
, result
;
3594 Lisp_Object enabled
;
3596 if (EQ (def
, Qundefined
))
3598 /* If a map has an explicit nil as definition,
3599 discard any previously made menu bar item. */
3600 tem
= Fassq (key
, result
);
3601 return Fdelq (tem
, result
);
3604 /* See if this entry is enabled. */
3607 if (XTYPE (def
) == Lisp_Symbol
)
3609 /* No property, or nil, means enable.
3610 Otherwise, enable if value is not nil. */
3611 tem
= Fget (def
, Qmenu_enable
);
3613 enabled
= Feval (tem
);
3616 /* Add an entry for this key and string
3617 if there is none yet. */
3618 tem
= Fassq (key
, result
);
3619 if (!NILP (enabled
) && NILP (tem
))
3620 result
= Fcons (Fcons (key
, Fcons (item_string
, Qnil
)), result
);
3625 /* Read a character using menus based on maps in the array MAPS.
3626 NMAPS is the length of MAPS. Return nil if there are no menus in the maps.
3627 Return t if we displayed a menu but the user rejected it.
3629 PREV_EVENT is the previous input event, or nil if we are reading
3630 the first event of a key sequence.
3632 If USED_MOUSE_MENU is non-zero, then we set *USED_MOUSE_MENU to 1
3633 if we used a mouse menu to read the input, or zero otherwise. If
3634 USED_MOUSE_MENU is zero, *USED_MOUSE_MENU is left alone.
3636 The prompting is done based on the prompt-string of the map
3637 and the strings associated with various map elements.
3639 This can be done with X menus or with menus put in the minibuf.
3640 These are done in different ways, depending on how the input will be read.
3641 Menus using X are done after auto-saving in read-char, getting the input
3642 event from Fx_popup_menu; menus using the minibuf use read_char recursively
3643 and do auto-saving in the inner call of read_char. */
3646 read_char_x_menu_prompt (nmaps
, maps
, prev_event
, used_mouse_menu
)
3649 Lisp_Object prev_event
;
3650 int *used_mouse_menu
;
3653 register Lisp_Object name
;
3654 Lisp_Object rest
, vector
;
3656 if (used_mouse_menu
)
3657 *used_mouse_menu
= 0;
3659 /* Use local over global Menu maps */
3661 if (! menu_prompting
)
3664 /* Get the menu name from the first map that has one (a prompt string). */
3665 for (mapno
= 0; mapno
< nmaps
; mapno
++)
3667 name
= map_prompt (maps
[mapno
]);
3672 /* If we don't have any menus, just read a character normally. */
3676 #ifdef HAVE_X_WINDOWS
3678 /* If we got to this point via a mouse click,
3679 use a real menu for mouse selection. */
3680 if (EVENT_HAS_PARAMETERS (prev_event
))
3682 /* Display the menu and get the selection. */
3683 Lisp_Object
*realmaps
3684 = (Lisp_Object
*) alloca (nmaps
* sizeof (Lisp_Object
));
3688 /* Use the maps that are not nil. */
3689 for (mapno
= 0; mapno
< nmaps
; mapno
++)
3690 if (!NILP (maps
[mapno
]))
3691 realmaps
[nmaps1
++] = maps
[mapno
];
3693 value
= Fx_popup_menu (prev_event
, Flist (nmaps1
, realmaps
));
3696 /* If we got more than one event, put all but the first
3697 onto this list to be read later.
3698 Return just the first event now. */
3699 unread_command_events
3700 = nconc2 (XCONS (value
)->cdr
, unread_command_events
);
3701 value
= XCONS (value
)->car
;
3705 if (used_mouse_menu
)
3706 *used_mouse_menu
= 1;
3709 #endif /* HAVE_X_MENU */
3710 #endif /* HAVE_X_WINDOWS */
3715 read_char_minibuf_menu_prompt(commandflag
, nmaps
, maps
)
3721 register Lisp_Object name
;
3723 int width
= FRAME_WIDTH (selected_frame
) - 4;
3724 char *menu
= (char *) alloca (width
+ 4);
3727 Lisp_Object rest
, vector
;
3729 if (! menu_prompting
)
3732 /* Get the menu name from the first map that has one (a prompt string). */
3733 for (mapno
= 0; mapno
< nmaps
; mapno
++)
3735 name
= map_prompt (maps
[mapno
]);
3740 /* If we don't have any menus, just read a character normally. */
3744 /* Prompt string always starts with map's prompt, and a space. */
3745 strcpy (menu
, XSTRING (name
)->data
);
3746 nlength
= XSTRING (name
)->size
;
3747 menu
[nlength
++] = ':';
3748 menu
[nlength
++] = ' ';
3751 /* Start prompting at start of first map. */
3755 /* Present the documented bindings, a line at a time. */
3762 int orig_defn_macro
;
3764 /* Loop over elements of map. */
3769 /* If reached end of map, start at beginning of next map. */
3773 /* At end of last map, wrap around to first map if just starting,
3774 or end this line if already have something on it. */
3778 if (notfirst
|| nobindings
) break;
3783 /* Look at the next element of the map. */
3785 elt
= XVECTOR (vector
)->contents
[idx
];
3787 elt
= Fcar_safe (rest
);
3789 if (idx
< 0 && XTYPE (elt
) == Lisp_Vector
)
3791 /* If we found a dense table in the keymap,
3792 advanced past it, but start scanning its contents. */
3793 rest
= Fcdr_safe (rest
);
3799 /* An ordinary element. */
3801 s
= Fcar_safe (Fcdr_safe (elt
)); /* alist */
3803 s
= Fcar_safe(elt
); /* vector */
3804 if (XTYPE (s
) != Lisp_String
)
3805 /* Ignore the element if it has no prompt string. */
3807 /* If we have room for the prompt string, add it to this line.
3808 If this is the first on the line, always add it. */
3809 else if (XSTRING (s
)->size
+ i
+ 2 < width
3814 /* Punctuate between strings. */
3817 strcpy (menu
+ i
, ", ");
3823 /* Add as much of string as fits. */
3824 thiswidth
= XSTRING (s
)->size
;
3825 if (thiswidth
+ i
> width
)
3826 thiswidth
= width
- i
;
3827 bcopy (XSTRING (s
)->data
, menu
+ i
, thiswidth
);
3833 /* If this element does not fit, end the line now,
3834 and save the element for the next line. */
3835 strcpy (menu
+ i
, "...");
3839 /* Move past this element. */
3840 if (idx
>= 0 && idx
+ 1 >= XVECTOR (vector
)->size
)
3841 /* Handle reaching end of dense table. */
3846 rest
= Fcdr_safe (rest
);
3850 /* Prompt with that and read response. */
3853 /* Make believe its not a keyboard macro in case the help char
3854 is pressed. Help characters are not recorded because menu prompting
3855 is not used on replay.
3857 orig_defn_macro
= defining_kbd_macro
;
3858 defining_kbd_macro
= 0 ;
3859 obj
= read_char (commandflag
, 0, 0, Qnil
, 0);
3860 defining_kbd_macro
= orig_defn_macro
;
3862 if (XTYPE (obj
) != Lisp_Int
)
3867 if (! EQ (obj
, menu_prompt_more_char
)
3868 && (XTYPE (menu_prompt_more_char
) != Lisp_Int
3869 || ! EQ (obj
, make_number (Ctl (XINT (menu_prompt_more_char
))))))
3871 if ( defining_kbd_macro
)
3872 store_kbd_macro_char(obj
) ;
3875 /* Help char - go round again */
3879 /* Reading key sequences. */
3881 /* Follow KEY in the maps in CURRENT[0..NMAPS-1], placing its bindings
3882 in DEFS[0..NMAPS-1]. Set NEXT[i] to DEFS[i] if DEFS[i] is a
3883 keymap, or nil otherwise. Return the index of the first keymap in
3884 which KEY has any binding, or NMAPS if no map has a binding.
3886 If KEY is a meta ASCII character, treat it like meta-prefix-char
3887 followed by the corresponding non-meta character. Keymaps in
3888 CURRENT with non-prefix bindings for meta-prefix-char become nil in
3891 When KEY is not defined in any of the keymaps, if it is an upper
3892 case letter and there are bindings for the corresponding lower-case
3893 letter, return the bindings for the lower-case letter.
3894 We store 1 in *CASE_CONVERTED in this case.
3895 Otherwise, we don't change *CASE_CONVERTED.
3897 If KEY has no bindings in any of the CURRENT maps, NEXT is left
3900 NEXT may == CURRENT. */
3903 follow_key (key
, nmaps
, current
, defs
, next
, case_converted
)
3905 Lisp_Object
*current
, *defs
, *next
;
3907 int *case_converted
;
3909 int i
, first_binding
;
3911 /* If KEY is a meta ASCII character, treat it like meta-prefix-char
3912 followed by the corresponding non-meta character. */
3913 if (XTYPE (key
) == Lisp_Int
&& (XINT (key
) & CHAR_META
))
3915 for (i
= 0; i
< nmaps
; i
++)
3916 if (! NILP (current
[i
]))
3919 get_keyelt (access_keymap (current
[i
], meta_prefix_char
, 1, 0));
3921 /* Note that since we pass the resulting bindings through
3922 get_keymap_1, non-prefix bindings for meta-prefix-char
3924 next
[i
] = get_keymap_1 (next
[i
], 0, 1);
3930 XSET (key
, Lisp_Int
, XFASTINT (key
) & ~CHAR_META
);
3933 first_binding
= nmaps
;
3934 for (i
= nmaps
- 1; i
>= 0; i
--)
3936 if (! NILP (current
[i
]))
3938 defs
[i
] = get_keyelt (access_keymap (current
[i
], key
, 1, 0));
3939 if (! NILP (defs
[i
]))
3946 /* When KEY is not defined in any of the keymaps, if it is an upper
3947 case letter and there are bindings for the corresponding
3948 lower-case letter, return the bindings for the lower-case letter. */
3949 if (first_binding
== nmaps
3950 && XTYPE (key
) == Lisp_Int
3951 && ((((XINT (key
) & 0x3ffff)
3952 < XSTRING (current_buffer
->downcase_table
)->size
)
3953 && UPPERCASEP (XINT (key
) & 0x3ffff))
3954 || (XINT (key
) & shift_modifier
)))
3956 if (XINT (key
) & shift_modifier
)
3957 XSETINT (key
, XINT (key
) & ~shift_modifier
);
3959 XSETINT (key
, (DOWNCASE (XINT (key
) & 0x3ffff)
3960 | (XINT (key
) & ~0x3ffff)));
3962 first_binding
= nmaps
;
3963 for (i
= nmaps
- 1; i
>= 0; i
--)
3965 if (! NILP (current
[i
]))
3967 defs
[i
] = get_keyelt (access_keymap (current
[i
], key
, 1, 0));
3968 if (! NILP (defs
[i
]))
3974 if (first_binding
!= nmaps
)
3975 *case_converted
= 1;
3978 /* Given the set of bindings we've found, produce the next set of maps. */
3979 if (first_binding
< nmaps
)
3980 for (i
= 0; i
< nmaps
; i
++)
3981 next
[i
] = NILP (defs
[i
]) ? Qnil
: get_keymap_1 (defs
[i
], 0, 1);
3983 return first_binding
;
3986 /* Read a sequence of keys that ends with a non prefix character,
3987 storing it in KEYBUF, a buffer of size BUFSIZE.
3989 Return the length of the key sequence stored.
3990 Return -1 if the user rejected a command menu.
3992 Echo starting immediately unless `prompt' is 0.
3994 Where a key sequence ends depends on the currently active keymaps.
3995 These include any minor mode keymaps active in the current buffer,
3996 the current buffer's local map, and the global map.
3998 If a key sequence has no other bindings, we check Vfunction_key_map
3999 to see if some trailing subsequence might be the beginning of a
4000 function key's sequence. If so, we try to read the whole function
4001 key, and substitute its symbolic name into the key sequence.
4003 We ignore unbound `down-' mouse clicks. We turn unbound `drag-' and
4004 `double-' events into similar click events, if that would make them
4005 bound. We try to turn `triple-' events first into `double-' events,
4008 If we get a mouse click in a mode line, vertical divider, or other
4009 non-text area, we treat the click as if it were prefixed by the
4010 symbol denoting that area - `mode-line', `vertical-line', or
4013 If the sequence starts with a mouse click, we read the key sequence
4014 with respect to the buffer clicked on, not the current buffer.
4016 If the user switches frames in the midst of a key sequence, we put
4017 off the switch-frame event until later; the next call to
4018 read_char will return it. */
4021 read_key_sequence (keybuf
, bufsize
, prompt
)
4022 Lisp_Object
*keybuf
;
4026 int count
= specpdl_ptr
- specpdl
;
4028 /* How many keys there are in the current key sequence. */
4031 /* The length of the echo buffer when we started reading, and
4032 the length of this_command_keys when we started reading. */
4036 /* The number of keymaps we're scanning right now, and the number of
4037 keymaps we have allocated space for. */
4039 int nmaps_allocated
= 0;
4041 /* defs[0..nmaps-1] are the definitions of KEYBUF[0..t-1] in
4042 the current keymaps. */
4045 /* submaps[0..nmaps-1] are the prefix definitions of KEYBUF[0..t-1]
4046 in the current keymaps, or nil where it is not a prefix. */
4047 Lisp_Object
*submaps
;
4049 /* The index in defs[] of the first keymap that has a binding for
4050 this key sequence. In other words, the lowest i such that
4051 defs[i] is non-nil. */
4054 /* If t < mock_input, then KEYBUF[t] should be read as the next
4057 We use this to recover after recognizing a function key. Once we
4058 realize that a suffix of the current key sequence is actually a
4059 function key's escape sequence, we replace the suffix with the
4060 function key's binding from Vfunction_key_map. Now keybuf
4061 contains a new and different key sequence, so the echo area,
4062 this_command_keys, and the submaps and defs arrays are wrong. In
4063 this situation, we set mock_input to t, set t to 0, and jump to
4064 restart_sequence; the loop will read keys from keybuf up until
4065 mock_input, thus rebuilding the state; and then it will resume
4066 reading characters from the keyboard. */
4069 /* If the sequence is unbound in submaps[], then
4070 keybuf[fkey_start..fkey_end-1] is a prefix in Vfunction_key_map,
4071 and fkey_map is its binding.
4073 These might be > t, indicating that all function key scanning
4074 should hold off until t reaches them. We do this when we've just
4075 recognized a function key, to avoid searching for the function
4076 key's again in Vfunction_key_map. */
4077 int fkey_start
= 0, fkey_end
= 0;
4078 Lisp_Object fkey_map
;
4080 /* Likewise, for key_translation_map. */
4081 int keytran_start
= 0, keytran_end
= 0;
4082 Lisp_Object keytran_map
;
4084 /* If we receive a ``switch-frame'' event in the middle of a key sequence,
4085 we put it off for later. While we're reading, we keep the event here. */
4086 Lisp_Object delayed_switch_frame
;
4088 /* See the comment below... */
4089 #if defined (GOBBLE_FIRST_EVENT)
4090 Lisp_Object first_event
;
4093 struct buffer
*starting_buffer
;
4095 /* Nonzero if we found the binding for one of the chars
4096 in this key sequence by downcasing it. */
4097 int case_converted
= 0;
4099 /* Nonzero if we seem to have got the beginning of a binding
4100 in function_key_map. */
4101 int function_key_possible
= 0;
4105 last_nonmenu_event
= Qnil
;
4107 delayed_switch_frame
= Qnil
;
4108 fkey_map
= Vfunction_key_map
;
4109 keytran_map
= Vkey_translation_map
;
4111 /* If there is no function-key-map, turn off function key scanning. */
4112 if (NILP (Fkeymapp (Vfunction_key_map
)))
4113 fkey_start
= fkey_end
= bufsize
+ 1;
4115 /* If there is no key-translation-map, turn off scanning. */
4116 if (NILP (Fkeymapp (Vkey_translation_map
)))
4117 keytran_start
= keytran_end
= bufsize
+ 1;
4122 echo_prompt (XSTRING (prompt
)->data
);
4123 else if (cursor_in_echo_area
)
4124 /* This doesn't put in a dash if the echo buffer is empty, so
4125 you don't always see a dash hanging out in the minibuffer. */
4129 /* Record the initial state of the echo area and this_command_keys;
4130 we will need to restore them if we replay a key sequence. */
4132 echo_start
= echo_length ();
4133 keys_start
= this_command_key_count
;
4135 #if defined (GOBBLE_FIRST_EVENT)
4136 /* This doesn't quite work, because some of the things that read_char
4137 does cannot safely be bypassed. It seems too risky to try to make
4140 /* Read the first char of the sequence specially, before setting
4141 up any keymaps, in case a filter runs and switches buffers on us. */
4142 first_event
= read_char (NILP (prompt
), 0, submaps
, last_nonmenu_event
,
4144 #endif /* GOBBLE_FIRST_EVENT */
4146 /* We jump here when the key sequence has been thoroughly changed, and
4147 we need to rescan it starting from the beginning. When we jump here,
4148 keybuf[0..mock_input] holds the sequence we should reread. */
4151 starting_buffer
= current_buffer
;
4153 function_key_possible
= 0;
4155 /* Build our list of keymaps.
4156 If we recognize a function key and replace its escape sequence in
4157 keybuf with its symbol, or if the sequence starts with a mouse
4158 click and we need to switch buffers, we jump back here to rebuild
4159 the initial keymaps from the current buffer. */
4163 if (!NILP (Voverriding_local_map
))
4166 if (nmaps
> nmaps_allocated
)
4168 submaps
= (Lisp_Object
*) alloca (nmaps
* sizeof (submaps
[0]));
4169 defs
= (Lisp_Object
*) alloca (nmaps
* sizeof (defs
[0]));
4170 nmaps_allocated
= nmaps
;
4172 submaps
[0] = Voverriding_local_map
;
4176 nmaps
= current_minor_maps (0, &maps
) + 2;
4177 if (nmaps
> nmaps_allocated
)
4179 submaps
= (Lisp_Object
*) alloca (nmaps
* sizeof (submaps
[0]));
4180 defs
= (Lisp_Object
*) alloca (nmaps
* sizeof (defs
[0]));
4181 nmaps_allocated
= nmaps
;
4183 bcopy (maps
, submaps
, (nmaps
- 2) * sizeof (submaps
[0]));
4184 #ifdef USE_TEXT_PROPERTIES
4185 submaps
[nmaps
-2] = get_local_map (PT
, current_buffer
);
4187 submaps
[nmaps
-2] = current_buffer
->keymap
;
4190 submaps
[nmaps
-1] = current_global_map
;
4193 /* Find an accurate initial value for first_binding. */
4194 for (first_binding
= 0; first_binding
< nmaps
; first_binding
++)
4195 if (! NILP (submaps
[first_binding
]))
4198 /* Start from the beginning in keybuf. */
4201 /* These are no-ops the first time through, but if we restart, they
4202 revert the echo area and this_command_keys to their original state. */
4203 this_command_key_count
= keys_start
;
4204 if (INTERACTIVE
&& t
< mock_input
)
4205 echo_truncate (echo_start
);
4207 /* If the best binding for the current key sequence is a keymap, or
4208 we may be looking at a function key's escape sequence, keep on
4210 while ((first_binding
< nmaps
&& ! NILP (submaps
[first_binding
]))
4211 || (first_binding
>= nmaps
4213 /* mock input is never part of a function key's sequence. */
4214 && mock_input
<= fkey_start
)
4215 || (first_binding
>= nmaps
4216 && keytran_start
< t
4217 /* mock input is never part of a function key's sequence. */
4218 && mock_input
<= keytran_start
)
4219 /* Don't return in the middle of a possible function key sequence,
4220 if the only bindings we found were via case conversion.
4221 Thus, if ESC O a has a function-key-map translation
4222 and ESC o has a binding, don't return after ESC O,
4223 so that we can translate ESC O plus the next character. */
4224 || (function_key_possible
&& case_converted
))
4227 int used_mouse_menu
= 0;
4229 /* Where the last real key started. If we need to throw away a
4230 key that has expanded into more than one element of keybuf
4231 (say, a mouse click on the mode line which is being treated
4232 as [mode-line (mouse-...)], then we backtrack to this point
4234 int last_real_key_start
;
4236 /* These variables are analogous to echo_start and keys_start;
4237 while those allow us to restart the entire key sequence,
4238 echo_local_start and keys_local_start allow us to throw away
4240 int echo_local_start
, keys_local_start
, local_first_binding
;
4243 error ("key sequence too long");
4246 echo_local_start
= echo_length ();
4247 keys_local_start
= this_command_key_count
;
4248 local_first_binding
= first_binding
;
4251 /* These are no-ops, unless we throw away a keystroke below and
4252 jumped back up to replay_key; in that case, these restore the
4253 variables to their original state, allowing us to replay the
4255 if (INTERACTIVE
&& t
< mock_input
)
4256 echo_truncate (echo_local_start
);
4257 this_command_key_count
= keys_local_start
;
4258 first_binding
= local_first_binding
;
4260 /* By default, assume each event is "real". */
4261 last_real_key_start
= t
;
4263 /* Does mock_input indicate that we are re-reading a key sequence? */
4267 add_command_key (key
);
4271 /* If not, we should actually read a character. */
4274 struct buffer
*buf
= current_buffer
;
4276 key
= read_char (NILP (prompt
), nmaps
, submaps
, last_nonmenu_event
,
4279 /* read_char returns t when it shows a menu and the user rejects it.
4284 /* read_char returns -1 at the end of a macro.
4285 Emacs 18 handles this by returning immediately with a
4286 zero, so that's what we'll do. */
4287 if (XTYPE (key
) == Lisp_Int
&& XINT (key
) == -1)
4293 /* If we have a quit that was typed in another frame, and
4294 quit_throw_to_read_char switched buffers,
4295 replay to get the right keymap. */
4296 if (EQ (key
, quit_char
) && current_buffer
!= starting_buffer
)
4301 goto replay_sequence
;
4307 /* Clicks in non-text areas get prefixed by the symbol
4308 in their CHAR-ADDRESS field. For example, a click on
4309 the mode line is prefixed by the symbol `mode-line'.
4311 Furthermore, key sequences beginning with mouse clicks
4312 are read using the keymaps of the buffer clicked on, not
4313 the current buffer. So we may have to switch the buffer
4316 When we turn one event into two events, we must make sure
4317 that neither of the two looks like the original--so that,
4318 if we replay the events, they won't be expanded again.
4319 If not for this, such reexpansion could happen either here
4320 or when user programs play with this-command-keys. */
4321 if (EVENT_HAS_PARAMETERS (key
))
4323 Lisp_Object kind
= EVENT_HEAD_KIND (EVENT_HEAD (key
));
4325 if (EQ (kind
, Qmouse_click
))
4327 Lisp_Object window
= POSN_WINDOW (EVENT_START (key
));
4328 Lisp_Object posn
= POSN_BUFFER_POSN (EVENT_START (key
));
4330 if (XTYPE (posn
) == Lisp_Cons
)
4332 /* We're looking at the second event of a
4333 sequence which we expanded before. Set
4334 last_real_key_start appropriately. */
4336 last_real_key_start
= t
- 1;
4339 /* Key sequences beginning with mouse clicks are
4340 read using the keymaps in the buffer clicked on,
4341 not the current buffer. If we're at the
4342 beginning of a key sequence, switch buffers. */
4343 if (last_real_key_start
== 0
4344 && XTYPE (window
) == Lisp_Window
4345 && XTYPE (XWINDOW (window
)->buffer
) == Lisp_Buffer
4346 && XBUFFER (XWINDOW (window
)->buffer
) != current_buffer
)
4351 /* Arrange to go back to the original buffer once we're
4352 done reading the key sequence. Note that we can't
4353 use save_excursion_{save,restore} here, because they
4354 save point as well as the current buffer; we don't
4355 want to save point, because redisplay may change it,
4356 to accommodate a Fset_window_start or something. We
4357 don't want to do this at the top of the function,
4358 because we may get input from a subprocess which
4359 wants to change the selected window and stuff (say,
4361 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
4363 set_buffer_internal (XBUFFER (XWINDOW (window
)->buffer
));
4364 goto replay_sequence
;
4366 else if (XTYPE (posn
) == Lisp_Symbol
)
4368 /* Expand mode-line and scroll-bar events into two events:
4369 use posn as a fake prefix key. */
4371 if (t
+ 1 >= bufsize
)
4372 error ("key sequence too long");
4377 /* Zap the position in key, so we know that we've
4378 expanded it, and don't try to do so again. */
4379 POSN_BUFFER_POSN (EVENT_START (key
))
4380 = Fcons (posn
, Qnil
);
4384 else if (EQ (kind
, Qswitch_frame
))
4386 /* If we're at the beginning of a key sequence, go
4387 ahead and return this event. If we're in the
4388 midst of a key sequence, delay it until the end. */
4391 delayed_switch_frame
= key
;
4397 Lisp_Object posn
= POSN_BUFFER_POSN (EVENT_START (key
));
4399 /* Handle menu-bar events:
4400 insert the dummy prefix event `menu-bar'. */
4401 if (EQ (posn
, Qmenu_bar
))
4403 if (t
+ 1 >= bufsize
)
4404 error ("key sequence too long");
4405 /* Run the Lucid hook. */
4406 call1 (Vrun_hooks
, Qactivate_menubar_hook
);
4407 /* If it has changed current-menubar from previous value,
4408 really recompute the menubar from the value. */
4409 if (! NILP (Vlucid_menu_bar_dirty_flag
))
4410 call0 (Qrecompute_lucid_menubar
);
4414 /* Zap the position in key, so we know that we've
4415 expanded it, and don't try to do so again. */
4416 POSN_BUFFER_POSN (EVENT_START (key
))
4417 = Fcons (posn
, Qnil
);
4420 goto replay_sequence
;
4422 else if (XTYPE (posn
) == Lisp_Cons
)
4424 /* We're looking at the second event of a
4425 sequence which we expanded before. Set
4426 last_real_key_start appropriately. */
4427 if (last_real_key_start
== t
&& t
> 0)
4428 last_real_key_start
= t
- 1;
4433 /* We have finally decided that KEY is something we might want
4435 first_binding
= (follow_key (key
,
4436 nmaps
- first_binding
,
4437 submaps
+ first_binding
,
4438 defs
+ first_binding
,
4439 submaps
+ first_binding
,
4443 /* If KEY wasn't bound, we'll try some fallbacks. */
4444 if (first_binding
>= nmaps
)
4446 Lisp_Object head
= EVENT_HEAD (key
);
4448 if (EQ (head
, Vhelp_char
))
4450 read_key_sequence_cmd
= Vprefix_help_command
;
4452 last_nonmenu_event
= key
;
4456 if (XTYPE (head
) == Lisp_Symbol
)
4458 Lisp_Object breakdown
= parse_modifiers (head
);
4459 int modifiers
= XINT (XCONS (XCONS (breakdown
)->cdr
)->car
);
4461 /* Attempt to reduce an unbound mouse event to a simpler
4462 event that is bound:
4463 Drags reduce to clicks.
4464 Double-clicks reduce to clicks.
4465 Triple-clicks reduce to double-clicks, then to clicks.
4466 Down-clicks are eliminated.
4467 Double-downs reduce to downs, then are eliminated.
4468 Triple-downs reduce to double-downs, then to downs,
4469 then are eliminated. */
4470 if (modifiers
& (down_modifier
| drag_modifier
4471 | double_modifier
| triple_modifier
))
4473 while (modifiers
& (down_modifier
| drag_modifier
4474 | double_modifier
| triple_modifier
))
4476 Lisp_Object new_head
, new_click
;
4477 if (modifiers
& triple_modifier
)
4478 modifiers
^= (double_modifier
| triple_modifier
);
4479 else if (modifiers
& (drag_modifier
| double_modifier
))
4480 modifiers
&= ~(drag_modifier
| double_modifier
);
4483 /* Dispose of this `down' event by simply jumping
4484 back to replay_key, to get another event.
4486 Note that if this event came from mock input,
4487 then just jumping back to replay_key will just
4488 hand it to us again. So we have to wipe out any
4491 We could delete keybuf[t] and shift everything
4492 after that to the left by one spot, but we'd also
4493 have to fix up any variable that points into
4494 keybuf, and shifting isn't really necessary
4497 Adding prefixes for non-textual mouse clicks
4498 creates two characters of mock input, and both
4499 must be thrown away. If we're only looking at
4500 the prefix now, we can just jump back to
4501 replay_key. On the other hand, if we've already
4502 processed the prefix, and now the actual click
4503 itself is giving us trouble, then we've lost the
4504 state of the keymaps we want to backtrack to, and
4505 we need to replay the whole sequence to rebuild
4508 Beyond that, only function key expansion could
4509 create more than two keys, but that should never
4510 generate mouse events, so it's okay to zero
4511 mock_input in that case too.
4513 Isn't this just the most wonderful code ever? */
4514 if (t
== last_real_key_start
)
4521 mock_input
= last_real_key_start
;
4522 goto replay_sequence
;
4527 = apply_modifiers (modifiers
, XCONS (breakdown
)->car
);
4529 = Fcons (new_head
, Fcons (EVENT_START (key
), Qnil
));
4531 /* Look for a binding for this new key. follow_key
4532 promises that it didn't munge submaps the
4533 last time we called it, since key was unbound. */
4535 = (follow_key (new_click
,
4536 nmaps
- local_first_binding
,
4537 submaps
+ local_first_binding
,
4538 defs
+ local_first_binding
,
4539 submaps
+ local_first_binding
,
4541 + local_first_binding
);
4543 /* If that click is bound, go for it. */
4544 if (first_binding
< nmaps
)
4549 /* Otherwise, we'll leave key set to the drag event. */
4556 /* Normally, last_nonmenu_event gets the previous key we read.
4557 But when a mouse popup menu is being used,
4558 we don't update last_nonmenu_event; it continues to hold the mouse
4559 event that preceded the first level of menu. */
4560 if (!used_mouse_menu
)
4561 last_nonmenu_event
= key
;
4563 /* If the sequence is unbound, see if we can hang a function key
4564 off the end of it. We only want to scan real keyboard input
4565 for function key sequences, so if mock_input says that we're
4566 re-reading old events, don't examine it. */
4567 if ((first_binding
>= nmaps
|| case_converted
)
4570 Lisp_Object fkey_next
;
4572 /* Continue scan from fkey_end until we find a bound suffix.
4573 If we fail, increment fkey_start
4574 and start fkey_end from there. */
4575 while (fkey_end
< t
)
4579 key
= keybuf
[fkey_end
++];
4580 /* Look up meta-characters by prefixing them
4581 with meta_prefix_char. I hate this. */
4582 if (XTYPE (key
) == Lisp_Int
&& XINT (key
) & meta_modifier
)
4587 (access_keymap (fkey_map
, meta_prefix_char
, 1, 0)),
4589 XFASTINT (key
) = XFASTINT (key
) & ~meta_modifier
;
4592 fkey_next
= fkey_map
;
4595 = get_keyelt (access_keymap (fkey_next
, key
, 1, 0));
4597 /* If the function key map gives a function, not an
4598 array, then call the function with no args and use
4599 its value instead. */
4600 if (SYMBOLP (fkey_next
) && ! NILP (Ffboundp (fkey_next
))
4603 struct gcpro gcpro1
, gcpro2
, gcpro3
;
4607 GCPRO3 (fkey_map
, keytran_map
, delayed_switch_frame
);
4608 fkey_next
= call1 (fkey_next
, prompt
);
4610 /* If the function returned something invalid,
4611 barf--don't ignore it.
4612 (To ignore it safely, we would need to gcpro a bunch of
4613 other variables.) */
4614 if (! (VECTORP (fkey_next
) || STRINGP (fkey_next
)))
4615 error ("Function in function-key-map returns invalid key sequence");
4618 function_key_possible
= ! NILP (fkey_next
);
4620 /* If keybuf[fkey_start..fkey_end] is bound in the
4621 function key map and it's a suffix of the current
4622 sequence (i.e. fkey_end == t), replace it with
4623 the binding and restart with fkey_start at the end. */
4624 if ((VECTORP (fkey_next
) || STRINGP (fkey_next
))
4627 int len
= XFASTINT (Flength (fkey_next
));
4629 t
= fkey_start
+ len
;
4631 error ("key sequence too long");
4633 if (VECTORP (fkey_next
))
4634 bcopy (XVECTOR (fkey_next
)->contents
,
4635 keybuf
+ fkey_start
,
4636 (t
- fkey_start
) * sizeof (keybuf
[0]));
4637 else if (STRINGP (fkey_next
))
4641 for (i
= 0; i
< len
; i
++)
4642 XFASTINT (keybuf
[fkey_start
+ i
])
4643 = XSTRING (fkey_next
)->data
[i
];
4647 fkey_start
= fkey_end
= t
;
4648 fkey_map
= Vfunction_key_map
;
4650 goto replay_sequence
;
4653 fkey_map
= get_keymap_1 (fkey_next
, 0, 1);
4655 /* If we no longer have a bound suffix, try a new positions for
4657 if (NILP (fkey_map
))
4659 fkey_end
= ++fkey_start
;
4660 fkey_map
= Vfunction_key_map
;
4661 function_key_possible
= 0;
4666 /* Look for this sequence in key-translation-map. */
4668 Lisp_Object keytran_next
;
4670 /* Scan from keytran_end until we find a bound suffix. */
4671 while (keytran_end
< t
)
4675 key
= keybuf
[keytran_end
++];
4676 /* Look up meta-characters by prefixing them
4677 with meta_prefix_char. I hate this. */
4678 if (XTYPE (key
) == Lisp_Int
&& XINT (key
) & meta_modifier
)
4683 (access_keymap (keytran_map
, meta_prefix_char
, 1, 0)),
4685 XFASTINT (key
) = XFASTINT (key
) & ~meta_modifier
;
4688 keytran_next
= keytran_map
;
4691 = get_keyelt (access_keymap (keytran_next
, key
, 1, 0));
4693 /* If the key translation map gives a function, not an
4694 array, then call the function with no args and use
4695 its value instead. */
4696 if (SYMBOLP (keytran_next
) && ! NILP (Ffboundp (keytran_next
))
4697 && keytran_end
== t
)
4699 struct gcpro gcpro1
, gcpro2
, gcpro3
;
4703 GCPRO3 (fkey_map
, keytran_map
, delayed_switch_frame
);
4704 keytran_next
= call1 (keytran_next
, prompt
);
4706 /* If the function returned something invalid,
4707 barf--don't ignore it.
4708 (To ignore it safely, we would need to gcpro a bunch of
4709 other variables.) */
4710 if (! (VECTORP (keytran_next
) || STRINGP (keytran_next
)))
4711 error ("Function in key-translation-map returns invalid key sequence");
4714 /* If keybuf[keytran_start..keytran_end] is bound in the
4715 key translation map and it's a suffix of the current
4716 sequence (i.e. keytran_end == t), replace it with
4717 the binding and restart with keytran_start at the end. */
4718 if ((VECTORP (keytran_next
) || STRINGP (keytran_next
))
4719 && keytran_end
== t
)
4721 int len
= XFASTINT (Flength (keytran_next
));
4723 t
= keytran_start
+ len
;
4725 error ("key sequence too long");
4727 if (VECTORP (keytran_next
))
4728 bcopy (XVECTOR (keytran_next
)->contents
,
4729 keybuf
+ keytran_start
,
4730 (t
- keytran_start
) * sizeof (keybuf
[0]));
4731 else if (STRINGP (keytran_next
))
4735 for (i
= 0; i
< len
; i
++)
4736 XFASTINT (keybuf
[keytran_start
+ i
])
4737 = XSTRING (keytran_next
)->data
[i
];
4741 keytran_start
= keytran_end
= t
;
4742 keytran_map
= Vkey_translation_map
;
4744 goto replay_sequence
;
4747 keytran_map
= get_keymap_1 (keytran_next
, 0, 1);
4749 /* If we no longer have a bound suffix, try a new positions for
4751 if (NILP (keytran_map
))
4753 keytran_end
= ++keytran_start
;
4754 keytran_map
= Vkey_translation_map
;
4760 read_key_sequence_cmd
= (first_binding
< nmaps
4761 ? defs
[first_binding
]
4765 unread_switch_frame
= delayed_switch_frame
;
4766 unbind_to (count
, Qnil
);
4768 /* Occasionally we fabricate events, perhaps by expanding something
4769 according to function-key-map, or by adding a prefix symbol to a
4770 mouse click in the scroll bar or modeline. In this cases, return
4771 the entire generated key sequence, even if we hit an unbound
4772 prefix or a definition before the end. This means that you will
4773 be able to push back the event properly, and also means that
4774 read-key-sequence will always return a logical unit.
4777 for (; t
< mock_input
; t
++)
4779 echo_char (keybuf
[t
]);
4780 add_command_key (keybuf
[t
]);
4786 #if 0 /* This doc string is too long for some compilers.
4787 This commented-out definition serves for DOC. */
4788 DEFUN ("read-key-sequence", Fread_key_sequence
, Sread_key_sequence
, 1, 2, 0,
4789 "Read a sequence of keystrokes and return as a string or vector.\n\
4790 The sequence is sufficient to specify a non-prefix command in the\n\
4791 current local and global maps.\n\
4793 First arg PROMPT is a prompt string. If nil, do not prompt specially.\n\
4794 Second (optional) arg CONTINUE-ECHO, if non-nil, means this key echos\n\
4795 as a continuation of the previous key.\n\
4797 A C-g typed while in this function is treated like any other character,\n\
4798 and `quit-flag' is not set.\n\
4800 If the key sequence starts with a mouse click, then the sequence is read\n\
4801 using the keymaps of the buffer of the window clicked in, not the buffer\n\
4802 of the selected window as normal.\n\
4804 `read-key-sequence' drops unbound button-down events, since you normally\n\
4805 only care about the click or drag events which follow them. If a drag\n\
4806 or multi-click event is unbound, but the corresponding click event would\n\
4807 be bound, `read-key-sequence' turns the event into a click event at the\n\
4808 drag's starting position. This means that you don't have to distinguish\n\
4809 between click and drag, double, or triple events unless you want to.\n\
4811 `read-key-sequence' prefixes mouse events on mode lines, the vertical\n\
4812 lines separating windows, and scroll bars with imaginary keys\n\
4813 `mode-line', `vertical-line', and `vertical-scroll-bar'.\n\
4815 If the user switches frames in the middle of a key sequence, the\n\
4816 frame-switch event is put off until after the current key sequence.\n\
4818 `read-key-sequence' checks `function-key-map' for function key\n\
4819 sequences, where they wouldn't conflict with ordinary bindings. See\n\
4820 `function-key-map' for more details.")
4821 (prompt
, continue_echo
)
4824 DEFUN ("read-key-sequence", Fread_key_sequence
, Sread_key_sequence
, 1, 2, 0,
4826 (prompt
, continue_echo
)
4827 Lisp_Object prompt
, continue_echo
;
4829 Lisp_Object keybuf
[30];
4831 struct gcpro gcpro1
, gcpro2
;
4834 CHECK_STRING (prompt
, 0);
4837 bzero (keybuf
, sizeof keybuf
);
4839 gcpro1
.nvars
= (sizeof keybuf
/sizeof (keybuf
[0]));
4841 if (NILP (continue_echo
))
4842 this_command_key_count
= 0;
4844 i
= read_key_sequence (keybuf
, (sizeof keybuf
/sizeof (keybuf
[0])), prompt
);
4852 return make_event_array (i
, keybuf
);
4855 DEFUN ("command-execute", Fcommand_execute
, Scommand_execute
, 1, 2, 0,
4856 "Execute CMD as an editor command.\n\
4857 CMD must be a symbol that satisfies the `commandp' predicate.\n\
4858 Optional second arg RECORD-FLAG non-nil\n\
4859 means unconditionally put this command in `command-history'.\n\
4860 Otherwise, that is done only if an arg is read using the minibuffer.")
4862 Lisp_Object cmd
, record
;
4864 register Lisp_Object final
;
4865 register Lisp_Object tem
;
4866 Lisp_Object prefixarg
;
4867 struct backtrace backtrace
;
4868 extern int debug_on_next_call
;
4870 prefixarg
= Vprefix_arg
, Vprefix_arg
= Qnil
;
4871 Vcurrent_prefix_arg
= prefixarg
;
4872 debug_on_next_call
= 0;
4874 if (XTYPE (cmd
) == Lisp_Symbol
)
4876 tem
= Fget (cmd
, Qdisabled
);
4878 return call1 (Vrun_hooks
, Qdisabled_command_hook
);
4883 final
= Findirect_function (cmd
);
4885 if (CONSP (final
) && (tem
= Fcar (final
), EQ (tem
, Qautoload
)))
4886 do_autoload (final
, cmd
);
4891 if (XTYPE (final
) == Lisp_String
4892 || XTYPE (final
) == Lisp_Vector
)
4894 /* If requested, place the macro in the command history. For
4895 other sorts of commands, call-interactively takes care of
4899 = Fcons (Fcons (Qexecute_kbd_macro
,
4900 Fcons (final
, Fcons (prefixarg
, Qnil
))),
4903 return Fexecute_kbd_macro (final
, prefixarg
);
4905 if (CONSP (final
) || XTYPE (final
) == Lisp_Subr
4906 || XTYPE (final
) == Lisp_Compiled
)
4908 backtrace
.next
= backtrace_list
;
4909 backtrace_list
= &backtrace
;
4910 backtrace
.function
= &Qcall_interactively
;
4911 backtrace
.args
= &cmd
;
4912 backtrace
.nargs
= 1;
4913 backtrace
.evalargs
= 0;
4915 tem
= Fcall_interactively (cmd
, record
);
4917 backtrace_list
= backtrace
.next
;
4923 DEFUN ("execute-extended-command", Fexecute_extended_command
, Sexecute_extended_command
,
4925 "Read function name, then read its arguments and call it.")
4927 Lisp_Object prefixarg
;
4929 Lisp_Object function
;
4931 Lisp_Object saved_keys
;
4932 struct gcpro gcpro1
;
4934 saved_keys
= Fthis_command_keys ();
4936 GCPRO1 (saved_keys
);
4938 if (EQ (prefixarg
, Qminus
))
4940 else if (CONSP (prefixarg
) && XINT (XCONS (prefixarg
)->car
) == 4)
4941 strcpy (buf
, "C-u ");
4942 else if (CONSP (prefixarg
) && XTYPE (XCONS (prefixarg
)->car
) == Lisp_Int
)
4943 sprintf (buf
, "%d ", XINT (XCONS (prefixarg
)->car
));
4944 else if (XTYPE (prefixarg
) == Lisp_Int
)
4945 sprintf (buf
, "%d ", XINT (prefixarg
));
4947 /* This isn't strictly correct if execute-extended-command
4948 is bound to anything else. Perhaps it should use
4949 this_command_keys? */
4950 strcat (buf
, "M-x ");
4952 /* Prompt with buf, and then read a string, completing from and
4953 restricting to the set of all defined commands. Don't provide
4954 any initial input. Save the command read on the extended-command
4956 function
= Fcompleting_read (build_string (buf
),
4957 Vobarray
, Qcommandp
,
4958 Qt
, Qnil
, Qextended_command_history
);
4960 /* Set this_command_keys to the concatenation of saved_keys and
4961 function, followed by a RET. */
4963 struct Lisp_String
*str
;
4967 this_command_key_count
= 0;
4969 str
= XSTRING (saved_keys
);
4970 for (i
= 0; i
< str
->size
; i
++)
4972 XFASTINT (tem
) = str
->data
[i
];
4973 add_command_key (tem
);
4976 str
= XSTRING (function
);
4977 for (i
= 0; i
< str
->size
; i
++)
4979 XFASTINT (tem
) = str
->data
[i
];
4980 add_command_key (tem
);
4983 XFASTINT (tem
) = '\015';
4984 add_command_key (tem
);
4989 function
= Fintern (function
, Qnil
);
4990 Vprefix_arg
= prefixarg
;
4991 this_command
= function
;
4993 return Fcommand_execute (function
, Qt
);
4997 detect_input_pending ()
5000 get_input_pending (&input_pending
);
5002 return input_pending
;
5005 /* This is called in some cases before a possible quit.
5006 It cases the next call to detect_input_pending to recompute input_pending.
5007 So calling this function unnecessarily can't do any harm. */
5008 clear_input_pending ()
5013 DEFUN ("input-pending-p", Finput_pending_p
, Sinput_pending_p
, 0, 0, 0,
5014 "T if command input is currently available with no waiting.\n\
5015 Actually, the value is nil only if we can be sure that no input is available.")
5018 if (!NILP (unread_command_events
) || unread_command_char
!= -1)
5021 return detect_input_pending () ? Qt
: Qnil
;
5024 DEFUN ("recent-keys", Frecent_keys
, Srecent_keys
, 0, 0, 0,
5025 "Return vector of last 100 events, not counting those from keyboard macros.")
5028 Lisp_Object
*keys
= XVECTOR (recent_keys
)->contents
;
5031 if (total_keys
< NUM_RECENT_KEYS
)
5032 return Fvector (total_keys
, keys
);
5035 val
= Fvector (NUM_RECENT_KEYS
, keys
);
5036 bcopy (keys
+ recent_keys_index
,
5037 XVECTOR (val
)->contents
,
5038 (NUM_RECENT_KEYS
- recent_keys_index
) * sizeof (Lisp_Object
));
5040 XVECTOR (val
)->contents
+ NUM_RECENT_KEYS
- recent_keys_index
,
5041 recent_keys_index
* sizeof (Lisp_Object
));
5046 DEFUN ("this-command-keys", Fthis_command_keys
, Sthis_command_keys
, 0, 0, 0,
5047 "Return the key sequence that invoked this command.\n\
5048 The value is a string or a vector.")
5051 return make_event_array (this_command_key_count
,
5052 XVECTOR (this_command_keys
)->contents
);
5055 DEFUN ("recursion-depth", Frecursion_depth
, Srecursion_depth
, 0, 0, 0,
5056 "Return the current depth in recursive edits.")
5060 XFASTINT (temp
) = command_loop_level
+ minibuf_level
;
5064 DEFUN ("open-dribble-file", Fopen_dribble_file
, Sopen_dribble_file
, 1, 1,
5065 "FOpen dribble file: ",
5066 "Start writing all keyboard characters to a dribble file called FILE.\n\
5067 If FILE is nil, close any open dribble file.")
5078 file
= Fexpand_file_name (file
, Qnil
);
5079 dribble
= fopen (XSTRING (file
)->data
, "w");
5084 DEFUN ("discard-input", Fdiscard_input
, Sdiscard_input
, 0, 0, 0,
5085 "Discard the contents of the terminal input buffer.\n\
5086 Also cancel any kbd macro being defined.")
5089 defining_kbd_macro
= 0;
5090 update_mode_lines
++;
5092 unread_command_events
= Qnil
;
5093 unread_command_char
= -1;
5095 discard_tty_input ();
5097 /* Without the cast, GCC complains that this assignment loses the
5098 volatile qualifier of kbd_store_ptr. Is there anything wrong
5100 kbd_fetch_ptr
= (struct input_event
*) kbd_store_ptr
;
5101 Ffillarray (kbd_buffer_frame_or_window
, Qnil
);
5107 DEFUN ("suspend-emacs", Fsuspend_emacs
, Ssuspend_emacs
, 0, 1, "",
5108 "Stop Emacs and return to superior process. You can resume later.\n\
5109 On systems that don't have job control, run a subshell instead.\n\n\
5110 If optional arg STUFFSTRING is non-nil, its characters are stuffed\n\
5111 to be read as terminal input by Emacs's parent, after suspension.\n\
5113 Before suspending, call the functions in `suspend-hook' with no args.\n\
5114 If any of them returns nil, don't call the rest and don't suspend.\n\
5115 Otherwise, suspend normally and after resumption run the normal hook\n\
5116 `suspend-resume-hook' if that is bound and non-nil.\n\
5118 Some operating systems cannot stop the Emacs process and resume it later.\n\
5119 On such systems, Emacs starts a subshell instead of suspending.")
5121 Lisp_Object stuffstring
;
5124 int count
= specpdl_ptr
- specpdl
;
5125 int old_height
, old_width
;
5127 struct gcpro gcpro1
, gcpro2
;
5128 extern init_sys_modes ();
5130 if (!NILP (stuffstring
))
5131 CHECK_STRING (stuffstring
, 0);
5133 /* Run the functions in suspend-hook. */
5134 if (!NILP (Vrun_hooks
))
5135 call1 (Vrun_hooks
, intern ("suspend-hook"));
5137 GCPRO1 (stuffstring
);
5138 get_frame_size (&old_width
, &old_height
);
5140 /* sys_suspend can get an error if it tries to fork a subshell
5141 and the system resources aren't available for that. */
5142 record_unwind_protect (init_sys_modes
, 0);
5143 stuff_buffered_input (stuffstring
);
5145 unbind_to (count
, Qnil
);
5147 /* Check if terminal/window size has changed.
5148 Note that this is not useful when we are running directly
5149 with a window system; but suspend should be disabled in that case. */
5150 get_frame_size (&width
, &height
);
5151 if (width
!= old_width
|| height
!= old_height
)
5152 change_frame_size (selected_frame
, height
, width
, 0, 0);
5154 /* Run suspend-resume-hook. */
5155 if (!NILP (Vrun_hooks
))
5156 call1 (Vrun_hooks
, intern ("suspend-resume-hook"));
5162 /* If STUFFSTRING is a string, stuff its contents as pending terminal input.
5163 Then in any case stuff anything Emacs has read ahead and not used. */
5165 stuff_buffered_input (stuffstring
)
5166 Lisp_Object stuffstring
;
5168 register unsigned char *p
;
5170 /* stuff_char works only in BSD, versions 4.2 and up. */
5173 if (XTYPE (stuffstring
) == Lisp_String
)
5177 p
= XSTRING (stuffstring
)->data
;
5178 count
= XSTRING (stuffstring
)->size
;
5183 /* Anything we have read ahead, put back for the shell to read. */
5184 while (kbd_fetch_ptr
!= kbd_store_ptr
)
5186 if (kbd_fetch_ptr
== kbd_buffer
+ KBD_BUFFER_SIZE
)
5187 kbd_fetch_ptr
= kbd_buffer
;
5188 if (kbd_fetch_ptr
->kind
== ascii_keystroke
)
5189 stuff_char (kbd_fetch_ptr
->code
);
5190 kbd_fetch_ptr
->kind
= no_event
;
5191 (XVECTOR (kbd_buffer_frame_or_window
)->contents
[kbd_fetch_ptr
5198 #endif /* BSD and not BSD4_1 */
5201 set_waiting_for_input (time_to_clear
)
5202 EMACS_TIME
*time_to_clear
;
5204 input_available_clear_time
= time_to_clear
;
5206 /* Tell interrupt_signal to throw back to read_char, */
5207 waiting_for_input
= 1;
5209 /* If interrupt_signal was called before and buffered a C-g,
5210 make it run again now, to avoid timing error. */
5211 if (!NILP (Vquit_flag
))
5212 quit_throw_to_read_char ();
5215 clear_waiting_for_input ()
5217 /* Tell interrupt_signal not to throw back to read_char, */
5218 waiting_for_input
= 0;
5219 input_available_clear_time
= 0;
5222 /* This routine is called at interrupt level in response to C-G.
5223 If interrupt_input, this is the handler for SIGINT.
5224 Otherwise, it is called from kbd_buffer_store_event,
5225 in handling SIGIO or SIGTINT.
5227 If `waiting_for_input' is non zero, then unless `echoing' is nonzero,
5228 immediately throw back to read_char.
5230 Otherwise it sets the Lisp variable quit-flag not-nil.
5231 This causes eval to throw, when it gets a chance.
5232 If quit-flag is already non-nil, it stops the job right away. */
5238 /* Must preserve main program's value of errno. */
5239 int old_errno
= errno
;
5242 /* USG systems forget handlers when they are used;
5243 must reestablish each time */
5244 signal (SIGINT
, interrupt_signal
);
5245 signal (SIGQUIT
, interrupt_signal
);
5250 if (!NILP (Vquit_flag
) && FRAME_TERMCAP_P (selected_frame
))
5255 #ifdef SIGTSTP /* Support possible in later USG versions */
5257 * On systems which can suspend the current process and return to the original
5258 * shell, this command causes the user to end up back at the shell.
5259 * The "Auto-save" and "Abort" questions are not asked until
5260 * the user elects to return to emacs, at which point he can save the current
5261 * job and either dump core or continue.
5266 if (sys_suspend () == -1)
5268 printf ("Not running as a subprocess;\n");
5269 printf ("you can continue or abort.\n");
5272 /* Perhaps should really fork an inferior shell?
5273 But that would not provide any way to get back
5274 to the original shell, ever. */
5275 printf ("No support for stopping a process on this operating system;\n");
5276 printf ("you can continue or abort.\n");
5277 #endif /* not VMS */
5278 #endif /* not SIGTSTP */
5280 /* We must remain inside the screen area when the internal terminal
5281 is used. Note that [Enter] is not echoed by dos. */
5284 printf ("Auto-save? (y or n) ");
5286 if (((c
= getchar ()) & ~040) == 'Y')
5288 Fdo_auto_save (Qt
, Qnil
);
5290 printf ("\r\nAuto-save done");
5291 #else /* not MSDOS */
5292 printf ("Auto-save done\n");
5293 #endif /* not MSDOS */
5295 while (c
!= '\n') c
= getchar ();
5297 printf ("\r\nAbort? (y or n) ");
5298 #else /* not MSDOS */
5300 printf ("Abort (and enter debugger)? (y or n) ");
5302 printf ("Abort (and dump core)? (y or n) ");
5303 #endif /* not VMS */
5304 #endif /* not MSDOS */
5306 if (((c
= getchar ()) & ~040) == 'Y')
5308 while (c
!= '\n') c
= getchar ();
5310 printf ("\r\nContinuing...\r\n");
5311 #else /* not MSDOS */
5312 printf ("Continuing...\n");
5313 #endif /* not MSDOS */
5319 /* If executing a function that wants to be interrupted out of
5320 and the user has not deferred quitting by binding `inhibit-quit'
5321 then quit right away. */
5322 if (immediate_quit
&& NILP (Vinhibit_quit
))
5326 Fsignal (Qquit
, Qnil
);
5329 /* Else request quit when it's safe */
5333 if (waiting_for_input
&& !echoing
)
5334 quit_throw_to_read_char ();
5339 /* Handle a C-g by making read_char return C-g. */
5341 quit_throw_to_read_char ()
5343 quit_error_check ();
5345 /* Prevent another signal from doing this before we finish. */
5346 clear_waiting_for_input ();
5349 unread_command_events
= Qnil
;
5350 unread_command_char
= -1;
5352 #ifdef POLL_FOR_INPUT
5353 /* May be > 1 if in recursive minibuffer. */
5354 if (poll_suppress_count
== 0)
5358 if (XTYPE (internal_last_event_frame
) == Lisp_Frame
5359 && XFRAME (internal_last_event_frame
) != selected_frame
)
5360 Fhandle_switch_frame (make_lispy_switch_frame (internal_last_event_frame
));
5363 _longjmp (getcjmp
, 1);
5366 DEFUN ("set-input-mode", Fset_input_mode
, Sset_input_mode
, 3, 4, 0,
5367 "Set mode of reading keyboard input.\n\
5368 First arg INTERRUPT non-nil means use input interrupts;\n\
5369 nil means use CBREAK mode.\n\
5370 Second arg FLOW non-nil means use ^S/^Q flow control for output to terminal\n\
5371 (no effect except in CBREAK mode).\n\
5372 Third arg META t means accept 8-bit input (for a Meta key).\n\
5373 META nil means ignore the top bit, on the assumption it is parity.\n\
5374 Otherwise, accept 8-bit input and don't use the top bit for Meta.\n\
5375 Optional fourth arg QUIT if non-nil specifies character to use for quitting.\n\
5376 See also `current-input-mode'.")
5377 (interrupt
, flow
, meta
, quit
)
5378 Lisp_Object interrupt
, flow
, meta
, quit
;
5381 && (XTYPE (quit
) != Lisp_Int
5382 || XINT (quit
) < 0 || XINT (quit
) > 0400))
5383 error ("set-input-mode: QUIT must be an ASCII character");
5385 #ifdef POLL_FOR_INPUT
5391 /* Note SIGIO has been undef'd if FIONREAD is missing. */
5392 #ifdef NO_SOCK_SIGIO
5393 if (read_socket_hook
)
5394 interrupt_input
= 0; /* No interrupts if reading from a socket. */
5396 #endif /* NO_SOCK_SIGIO */
5397 interrupt_input
= !NILP (interrupt
);
5398 #else /* not SIGIO */
5399 interrupt_input
= 0;
5400 #endif /* not SIGIO */
5401 /* Our VMS input only works by interrupts, as of now. */
5403 interrupt_input
= 1;
5405 flow_control
= !NILP (flow
);
5408 else if (EQ (meta
, Qt
))
5413 /* Don't let this value be out of range. */
5414 quit_char
= XINT (quit
) & (meta_key
? 0377 : 0177);
5418 #ifdef POLL_FOR_INPUT
5419 poll_suppress_count
= 1;
5425 DEFUN ("current-input-mode", Fcurrent_input_mode
, Scurrent_input_mode
, 0, 0, 0,
5426 "Return information about the way Emacs currently reads keyboard input.\n\
5427 The value is a list of the form (INTERRUPT FLOW META QUIT), where\n\
5428 INTERRUPT is non-nil if Emacs is using interrupt-driven input; if\n\
5429 nil, Emacs is using CBREAK mode.\n\
5430 FLOW is non-nil if Emacs uses ^S/^Q flow control for output to the\n\
5431 terminal; this does not apply if Emacs uses interrupt-driven input.\n\
5432 META is t if accepting 8-bit input with 8th bit as Meta flag.\n\
5433 META nil means ignoring the top bit, on the assumption it is parity.\n\
5434 META is neither t nor nil if accepting 8-bit input and using\n\
5435 all 8 bits as the character code.\n\
5436 QUIT is the character Emacs currently uses to quit.\n\
5437 The elements of this list correspond to the arguments of\n\
5443 val
[0] = interrupt_input
? Qt
: Qnil
;
5444 val
[1] = flow_control
? Qt
: Qnil
;
5445 val
[2] = meta_key
== 2 ? make_number (0) : meta_key
== 1 ? Qt
: Qnil
;
5446 XFASTINT (val
[3]) = quit_char
;
5448 return Flist (sizeof (val
) / sizeof (val
[0]), val
);
5454 /* This is correct before outermost invocation of the editor loop */
5455 command_loop_level
= -1;
5457 quit_char
= Ctl ('g');
5458 unread_command_events
= Qnil
;
5459 unread_command_char
= -1;
5461 recent_keys_index
= 0;
5462 kbd_fetch_ptr
= kbd_buffer
;
5463 kbd_store_ptr
= kbd_buffer
;
5464 do_mouse_tracking
= 0;
5468 /* This means that command_loop_1 won't try to select anything the first
5470 internal_last_event_frame
= Qnil
;
5471 Vlast_event_frame
= internal_last_event_frame
;
5474 /* If we're running a dumped Emacs, we need to clear out
5475 kbd_buffer_frame_or_window, in case some events got into it
5478 If we're running an undumped Emacs, it hasn't been initialized by
5479 syms_of_keyboard yet. */
5481 Ffillarray (kbd_buffer_frame_or_window
, Qnil
);
5483 if (!noninteractive
)
5485 signal (SIGINT
, interrupt_signal
);
5486 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
5487 /* For systems with SysV TERMIO, C-g is set up for both SIGINT and
5488 SIGQUIT and we can't tell which one it will give us. */
5489 signal (SIGQUIT
, interrupt_signal
);
5490 #endif /* HAVE_TERMIO */
5491 /* Note SIGIO has been undef'd if FIONREAD is missing. */
5493 signal (SIGIO
, input_available_signal
);
5497 /* Use interrupt input by default, if it works and noninterrupt input
5498 has deficiencies. */
5500 #ifdef INTERRUPT_INPUT
5501 interrupt_input
= 1;
5503 interrupt_input
= 0;
5506 /* Our VMS input only works by interrupts, as of now. */
5508 interrupt_input
= 1;
5514 if (keyboard_init_hook
)
5515 (*keyboard_init_hook
) ();
5517 #ifdef POLL_FOR_INPUT
5518 poll_suppress_count
= 1;
5523 /* This type's only use is in syms_of_keyboard, to initialize the
5524 event header symbols and put properties on them. */
5531 struct event_head head_table
[] = {
5532 &Qmouse_movement
, "mouse-movement", &Qmouse_movement
,
5533 &Qscroll_bar_movement
, "scroll-bar-movement", &Qmouse_movement
,
5534 &Qswitch_frame
, "switch-frame", &Qswitch_frame
,
5539 Qdisabled_command_hook
= intern ("disabled-command-hook");
5540 staticpro (&Qdisabled_command_hook
);
5542 Qself_insert_command
= intern ("self-insert-command");
5543 staticpro (&Qself_insert_command
);
5545 Qforward_char
= intern ("forward-char");
5546 staticpro (&Qforward_char
);
5548 Qbackward_char
= intern ("backward-char");
5549 staticpro (&Qbackward_char
);
5551 Qdisabled
= intern ("disabled");
5552 staticpro (&Qdisabled
);
5554 Qundefined
= intern ("undefined");
5555 staticpro (&Qundefined
);
5557 Qpre_command_hook
= intern ("pre-command-hook");
5558 staticpro (&Qpre_command_hook
);
5560 Qpost_command_hook
= intern ("post-command-hook");
5561 staticpro (&Qpost_command_hook
);
5563 Qcommand_hook_internal
= intern ("command-hook-internal");
5564 staticpro (&Qcommand_hook_internal
);
5566 Qfunction_key
= intern ("function-key");
5567 staticpro (&Qfunction_key
);
5568 Qmouse_click
= intern ("mouse-click");
5569 staticpro (&Qmouse_click
);
5571 Qmenu_enable
= intern ("menu-enable");
5572 staticpro (&Qmenu_enable
);
5574 Qmode_line
= intern ("mode-line");
5575 staticpro (&Qmode_line
);
5576 Qvertical_line
= intern ("vertical-line");
5577 staticpro (&Qvertical_line
);
5578 Qvertical_scroll_bar
= intern ("vertical-scroll-bar");
5579 staticpro (&Qvertical_scroll_bar
);
5580 Qmenu_bar
= intern ("menu-bar");
5581 staticpro (&Qmenu_bar
);
5583 Qabove_handle
= intern ("above-handle");
5584 staticpro (&Qabove_handle
);
5585 Qhandle
= intern ("handle");
5586 staticpro (&Qhandle
);
5587 Qbelow_handle
= intern ("below-handle");
5588 staticpro (&Qbelow_handle
);
5590 Qevent_kind
= intern ("event-kind");
5591 staticpro (&Qevent_kind
);
5592 Qevent_symbol_elements
= intern ("event-symbol-elements");
5593 staticpro (&Qevent_symbol_elements
);
5594 Qevent_symbol_element_mask
= intern ("event-symbol-element-mask");
5595 staticpro (&Qevent_symbol_element_mask
);
5596 Qmodifier_cache
= intern ("modifier-cache");
5597 staticpro (&Qmodifier_cache
);
5599 Qrecompute_lucid_menubar
= intern ("recompute-lucid-menubar");
5600 staticpro (&Qrecompute_lucid_menubar
);
5601 Qactivate_menubar_hook
= intern ("activate-menubar-hook");
5602 staticpro (&Qactivate_menubar_hook
);
5605 struct event_head
*p
;
5607 for (p
= head_table
;
5608 p
< head_table
+ (sizeof (head_table
) / sizeof (head_table
[0]));
5611 *p
->var
= intern (p
->name
);
5613 Fput (*p
->var
, Qevent_kind
, *p
->kind
);
5614 Fput (*p
->var
, Qevent_symbol_elements
, Fcons (*p
->var
, Qnil
));
5618 button_down_location
= Fmake_vector (make_number (NUM_MOUSE_BUTTONS
), Qnil
);
5619 staticpro (&button_down_location
);
5623 int len
= sizeof (modifier_names
) / sizeof (modifier_names
[0]);
5625 modifier_symbols
= Fmake_vector (make_number (len
), Qnil
);
5626 for (i
= 0; i
< len
; i
++)
5627 if (modifier_names
[i
])
5628 XVECTOR (modifier_symbols
)->contents
[i
] = intern (modifier_names
[i
]);
5629 staticpro (&modifier_symbols
);
5632 recent_keys
= Fmake_vector (make_number (NUM_RECENT_KEYS
), Qnil
);
5633 staticpro (&recent_keys
);
5635 this_command_keys
= Fmake_vector (make_number (40), Qnil
);
5636 staticpro (&this_command_keys
);
5638 Qextended_command_history
= intern ("extended-command-history");
5639 Fset (Qextended_command_history
, Qnil
);
5640 staticpro (&Qextended_command_history
);
5642 kbd_buffer_frame_or_window
5643 = Fmake_vector (make_number (KBD_BUFFER_SIZE
), Qnil
);
5644 staticpro (&kbd_buffer_frame_or_window
);
5646 func_key_syms
= Qnil
;
5647 staticpro (&func_key_syms
);
5650 staticpro (&mouse_syms
);
5652 unread_switch_frame
= Qnil
;
5653 staticpro (&unread_switch_frame
);
5655 defsubr (&Sread_key_sequence
);
5656 defsubr (&Srecursive_edit
);
5657 defsubr (&Strack_mouse
);
5658 defsubr (&Sinput_pending_p
);
5659 defsubr (&Scommand_execute
);
5660 defsubr (&Srecent_keys
);
5661 defsubr (&Sthis_command_keys
);
5662 defsubr (&Ssuspend_emacs
);
5663 defsubr (&Sabort_recursive_edit
);
5664 defsubr (&Sexit_recursive_edit
);
5665 defsubr (&Srecursion_depth
);
5666 defsubr (&Stop_level
);
5667 defsubr (&Sdiscard_input
);
5668 defsubr (&Sopen_dribble_file
);
5669 defsubr (&Sset_input_mode
);
5670 defsubr (&Scurrent_input_mode
);
5671 defsubr (&Sexecute_extended_command
);
5673 DEFVAR_LISP ("last-command-char", &last_command_char
,
5674 "Last input event that was part of a command.");
5676 DEFVAR_LISP ("last-command-event", &last_command_char
,
5677 "Last input event that was part of a command.");
5679 DEFVAR_LISP ("last-nonmenu-event", &last_nonmenu_event
,
5680 "Last input event in a command, except for mouse menu events.\n\
5681 Mouse menus give back keys that don't look like mouse events;\n\
5682 this variable holds the actual mouse event that led to the menu,\n\
5683 so that you can determine whether the command was run by mouse or not.");
5685 DEFVAR_LISP ("last-input-char", &last_input_char
,
5686 "Last input event.");
5688 DEFVAR_LISP ("last-input-event", &last_input_char
,
5689 "Last input event.");
5691 DEFVAR_LISP ("unread-command-events", &unread_command_events
,
5692 "List of objects to be read as next command input events.");
5694 DEFVAR_INT ("unread-command-char", &unread_command_char
,
5695 "If not -1, an object to be read as next command input event.");
5697 DEFVAR_LISP ("meta-prefix-char", &meta_prefix_char
,
5698 "Meta-prefix character code. Meta-foo as command input\n\
5699 turns into this character followed by foo.");
5700 XSET (meta_prefix_char
, Lisp_Int
, 033);
5702 DEFVAR_LISP ("last-command", &last_command
,
5703 "The last command executed. Normally a symbol with a function definition,\n\
5704 but can be whatever was found in the keymap, or whatever the variable\n\
5705 `this-command' was set to by that command.");
5706 last_command
= Qnil
;
5708 DEFVAR_LISP ("this-command", &this_command
,
5709 "The command now being executed.\n\
5710 The command can set this variable; whatever is put here\n\
5711 will be in `last-command' during the following command.");
5712 this_command
= Qnil
;
5714 DEFVAR_INT ("auto-save-interval", &auto_save_interval
,
5715 "*Number of keyboard input characters between auto-saves.\n\
5716 Zero means disable autosaving due to number of characters typed.");
5717 auto_save_interval
= 300;
5719 DEFVAR_LISP ("auto-save-timeout", &Vauto_save_timeout
,
5720 "*Number of seconds idle time before auto-save.\n\
5721 Zero or nil means disable auto-saving due to idleness.\n\
5722 After auto-saving due to this many seconds of idle time,\n\
5723 Emacs also does a garbage collection if that seems to be warranted.");
5724 XFASTINT (Vauto_save_timeout
) = 30;
5726 DEFVAR_INT ("echo-keystrokes", &echo_keystrokes
,
5727 "*Nonzero means echo unfinished commands after this many seconds of pause.");
5728 echo_keystrokes
= 1;
5730 DEFVAR_INT ("polling-period", &polling_period
,
5731 "*Interval between polling for input during Lisp execution.\n\
5732 The reason for polling is to make C-g work to stop a running program.\n\
5733 Polling is needed only when using X windows and SIGIO does not work.\n\
5734 Polling is automatically disabled in all other cases.");
5737 DEFVAR_LISP ("double-click-time", &Vdouble_click_time
,
5738 "*Maximum time between mouse clicks to make a double-click.\n\
5739 Measured in milliseconds. nil means disable double-click recognition;\n\
5740 t means double-clicks have no time limit and are detected\n\
5741 by position only.");
5742 Vdouble_click_time
= make_number (500);
5744 DEFVAR_INT ("num-input-keys", &num_input_keys
,
5745 "*Number of complete keys read from the keyboard so far.");
5749 DEFVAR_LISP ("last-event-frame", &Vlast_event_frame
,
5750 "*The frame in which the most recently read event occurred.\n\
5751 If the last event came from a keyboard macro, this is set to `macro'.");
5752 Vlast_event_frame
= Qnil
;
5755 DEFVAR_LISP ("help-char", &Vhelp_char
,
5756 "Character to recognize as meaning Help.\n\
5757 When it is read, do `(eval help-form)', and display result if it's a string.\n\
5758 If the value of `help-form' is nil, this char can be read normally.");
5759 XSET (Vhelp_char
, Lisp_Int
, Ctl ('H'));
5761 DEFVAR_LISP ("help-form", &Vhelp_form
,
5762 "Form to execute when character `help-char' is read.\n\
5763 If the form returns a string, that string is displayed.\n\
5764 If `help-form' is nil, the help char is not recognized.");
5767 DEFVAR_LISP ("prefix-help-command", &Vprefix_help_command
,
5768 "Command to run when `help-char' character follows a prefix key.\n\
5769 This command is used only when there is no actual binding\n\
5770 for that character after that prefix key.");
5771 Vprefix_help_command
= Qnil
;
5773 DEFVAR_LISP ("top-level", &Vtop_level
,
5774 "Form to evaluate when Emacs starts up.\n\
5775 Useful to set before you dump a modified Emacs.");
5778 DEFVAR_LISP ("keyboard-translate-table", &Vkeyboard_translate_table
,
5779 "String used as translate table for keyboard input, or nil.\n\
5780 Each character is looked up in this string and the contents used instead.\n\
5781 If string is of length N, character codes N and up are untranslated.");
5782 Vkeyboard_translate_table
= Qnil
;
5784 DEFVAR_LISP ("key-translation-map", &Vkey_translation_map
,
5785 "Keymap of key translations that can override keymaps.\n\
5786 This keymap works like `function-key-map', but comes after that,\n\
5787 and applies even for keys that have ordinary bindings.");
5788 Vkey_translation_map
= Qnil
;
5790 DEFVAR_BOOL ("menu-prompting", &menu_prompting
,
5791 "Non-nil means prompt with menus when appropriate.\n\
5792 This is done when reading from a keymap that has a prompt string,\n\
5793 for elements that have prompt strings.\n\
5794 The menu is displayed on the screen\n\
5795 if X menus were enabled at configuration\n\
5796 time and the previous event was a mouse click prefix key.\n\
5797 Otherwise, menu prompting uses the echo area.");
5800 DEFVAR_LISP ("menu-prompt-more-char", &menu_prompt_more_char
,
5801 "Character to see next line of menu prompt.\n\
5802 Type this character while in a menu prompt to rotate around the lines of it.");
5803 XSET (menu_prompt_more_char
, Lisp_Int
, ' ');
5805 DEFVAR_INT ("extra-keyboard-modifiers", &extra_keyboard_modifiers
,
5806 "A mask of additional modifier keys to use with every keyboard character.\n\
5807 Emacs applies the modifiers of the character stored here to each keyboard\n\
5808 character it reads. For example, after evaluating the expression\n\
5809 (setq extra-keyboard-modifiers ?\C-x)\n\
5810 all input characters will have the control modifier applied to them.\n\
5812 Note that the character ?\C-@, equivalent to the integer zero, does\n\
5813 not count as a control character; rather, it counts as a character\n\
5814 with no modifiers; thus, setting `extra-keyboard-modifiers' to zero\n\
5815 cancels any modification.");
5816 extra_keyboard_modifiers
= 0;
5818 DEFVAR_LISP ("deactivate-mark", &Vdeactivate_mark
,
5819 "If an editing command sets this to t, deactivate the mark afterward.\n\
5820 The command loop sets this to nil before each command,\n\
5821 and tests the value when the command returns.\n\
5822 Buffer modification stores t in this variable.");
5823 Vdeactivate_mark
= Qnil
;
5825 DEFVAR_LISP ("pre-command-hook", &Vpre_command_hook
,
5826 "Normal hook run before each command is executed.");
5827 Vpre_command_hook
= Qnil
;
5829 DEFVAR_LISP ("post-command-hook", &Vpost_command_hook
,
5830 "Normal hook run after each command is executed.");
5831 Vpost_command_hook
= Qnil
;
5833 DEFVAR_LISP ("lucid-menu-bar-dirty-flag", &Vlucid_menu_bar_dirty_flag
,
5834 "t means menu bar, specified Lucid style, needs to be recomputed.");
5835 Vlucid_menu_bar_dirty_flag
= Qnil
;
5837 DEFVAR_LISP ("menu-bar-final-items", &Vmenu_bar_final_items
,
5838 "List of menu bar items to move to the end of the menu bar.\n\
5839 The elements of the list are event types that may have menu bar bindings.");
5840 Vmenu_bar_final_items
= Qnil
;
5842 DEFVAR_LISP ("overriding-local-map", &Voverriding_local_map
,
5843 "Keymap that overrides all other local keymaps.\n\
5844 If this variable is non-nil, it is used as a keymap instead of the\n\
5845 buffer's local map, and the minor mode keymaps and text property keymaps.");
5846 Voverriding_local_map
= Qnil
;
5848 DEFVAR_BOOL ("track-mouse", &do_mouse_tracking
,
5849 "*Non-nil means generate motion events for mouse motion.");
5851 DEFVAR_LISP ("vendor-key-alist", &Vvendor_key_alist
,
5852 "Alist of vendor-specific X windows key symbols.\n\
5853 Each element should have the form (N . SYMBOL) where N is the\n\
5854 numeric keysym code (sans the \"vendor-specific\" bit 1<<28)\n\
5855 and SYMBOL is its name.");
5856 Vmenu_bar_final_items
= Qnil
;
5861 initial_define_key (global_map
, Ctl ('Z'), "suspend-emacs");
5862 initial_define_key (control_x_map
, Ctl ('Z'), "suspend-emacs");
5863 initial_define_key (meta_map
, Ctl ('C'), "exit-recursive-edit");
5864 initial_define_key (global_map
, Ctl (']'), "abort-recursive-edit");
5865 initial_define_key (meta_map
, 'x', "execute-extended-command");