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 /* Current depth in recursive edits. */
163 int command_loop_level
;
165 /* Total number of times command_loop has read a key sequence. */
168 /* Last input character read as a command. */
169 Lisp_Object last_command_char
;
171 /* Last input character read as a command, not counting menus
172 reached by the mouse. */
173 Lisp_Object last_nonmenu_event
;
175 /* Last input character read for any purpose. */
176 Lisp_Object last_input_char
;
178 /* If not Qnil, a list of objects to be read as subsequent command input. */
179 Lisp_Object unread_command_events
;
181 /* If not -1, an event to be read as subsequent command input. */
182 int unread_command_char
;
184 /* If not Qnil, this is a switch-frame event which we decided to put
185 off until the end of a key sequence. This should be read as the
186 next command input, after any unread_command_events.
188 read_key_sequence uses this to delay switch-frame events until the
189 end of the key sequence; Fread_char uses it to put off switch-frame
190 events until a non-ASCII event is acceptable as input. */
191 Lisp_Object unread_switch_frame
;
193 /* A mask of extra modifier bits to put into every keyboard char. */
194 int extra_keyboard_modifiers
;
196 /* Char to use as prefix when a meta character is typed in.
197 This is bound on entry to minibuffer in case ESC is changed there. */
199 Lisp_Object meta_prefix_char
;
201 /* Last size recorded for a current buffer which is not a minibuffer. */
202 static int last_non_minibuf_size
;
204 /* Number of idle seconds before an auto-save and garbage collection. */
205 static Lisp_Object Vauto_save_timeout
;
207 /* Total number of times read_char has returned. */
210 /* Total number of times read_char has returned, outside of macros. */
211 int num_nonmacro_input_chars
;
213 /* Auto-save automatically when this many characters have been typed
214 since the last time. */
216 static int auto_save_interval
;
218 /* Value of num_nonmacro_input_chars as of last auto save. */
222 /* Last command executed by the editor command loop, not counting
223 commands that set the prefix argument. */
225 Lisp_Object last_command
;
227 /* The command being executed by the command loop.
228 Commands may set this, and the value set will be copied into last_command
229 instead of the actual command. */
230 Lisp_Object this_command
;
233 /* The frame in which the last input event occurred, or Qmacro if the
234 last event came from a macro. We use this to determine when to
235 generate switch-frame events. This may be cleared by functions
236 like Fselect_frame, to make sure that a switch-frame event is
237 generated by the next character. */
238 Lisp_Object internal_last_event_frame
;
240 /* A user-visible version of the above, intended to allow users to
241 figure out where the last event came from, if the event doesn't
242 carry that information itself (i.e. if it was a character). */
243 Lisp_Object Vlast_event_frame
;
246 /* The timestamp of the last input event we received from the X server.
247 X Windows wants this for selection ownership. */
248 unsigned long last_event_timestamp
;
250 Lisp_Object Qself_insert_command
;
251 Lisp_Object Qforward_char
;
252 Lisp_Object Qbackward_char
;
253 Lisp_Object Qundefined
;
255 /* read_key_sequence stores here the command definition of the
256 key sequence that it reads. */
257 Lisp_Object read_key_sequence_cmd
;
259 /* Form to evaluate (if non-nil) when Emacs is started. */
260 Lisp_Object Vtop_level
;
262 /* User-supplied string to translate input characters through. */
263 Lisp_Object Vkeyboard_translate_table
;
265 /* Keymap mapping ASCII function key sequences onto their preferred forms. */
266 extern Lisp_Object Vfunction_key_map
;
268 /* Keymap mapping ASCII function key sequences onto their preferred forms. */
269 Lisp_Object Vkey_translation_map
;
271 /* Non-nil means deactivate the mark at end of this command. */
272 Lisp_Object Vdeactivate_mark
;
274 /* Menu bar specified in Lucid Emacs fashion. */
276 Lisp_Object Vlucid_menu_bar_dirty_flag
;
277 Lisp_Object Qrecompute_lucid_menubar
, Qactivate_menubar_hook
;
279 /* Hooks to run before and after each command. */
280 Lisp_Object Qpre_command_hook
, Qpost_command_hook
;
281 Lisp_Object Vpre_command_hook
, Vpost_command_hook
;
283 /* File in which we write all commands we read. */
286 /* Nonzero if input is available. */
289 /* 1 if should obey 0200 bit in input chars as "Meta", 2 if should
290 keep 0200 bit in input chars. 0 to ignore the 0200 bit. */
294 extern char *pending_malloc_warning
;
296 /* Circular buffer for pre-read keyboard input. */
297 static struct input_event kbd_buffer
[KBD_BUFFER_SIZE
];
299 /* Vector to GCPRO the frames and windows mentioned in kbd_buffer.
301 The interrupt-level event handlers will never enqueue an event on a
302 frame which is not in Vframe_list, and once an event is dequeued,
303 internal_last_event_frame or the event itself points to the frame.
306 But while the event is sitting in the queue, it's completely
307 unprotected. Suppose the user types one command which will run for
308 a while and then delete a frame, and then types another event at
309 the frame that will be deleted, before the command gets around to
310 it. Suppose there are no references to this frame elsewhere in
311 Emacs, and a GC occurs before the second event is dequeued. Now we
312 have an event referring to a freed frame, which will crash Emacs
315 Similar things happen when an event on a scroll bar is enqueued; the
316 window may be deleted while the event is in the queue.
318 So, we use this vector to protect the frame_or_window field in the
319 event queue. That way, they'll be dequeued as dead frames or
320 windows, but still valid lisp objects.
322 If kbd_buffer[i].kind != no_event, then
323 (XVECTOR (kbd_buffer_frame_or_window)->contents[i]
324 == kbd_buffer[i].frame_or_window. */
325 static Lisp_Object kbd_buffer_frame_or_window
;
327 /* Pointer to next available character in kbd_buffer.
328 If kbd_fetch_ptr == kbd_store_ptr, the buffer is empty.
329 This may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the the
330 next available char is in kbd_buffer[0]. */
331 static struct input_event
*kbd_fetch_ptr
;
333 /* Pointer to next place to store character in kbd_buffer. This
334 may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the next
335 character should go in kbd_buffer[0]. */
339 static struct input_event
*kbd_store_ptr
;
341 /* The above pair of variables forms a "queue empty" flag. When we
342 enqueue a non-hook event, we increment kbd_write_count. When we
343 dequeue a non-hook event, we increment kbd_read_count. We say that
344 there is input available iff the two counters are not equal.
346 Why not just have a flag set and cleared by the enqueuing and
347 dequeuing functions? Such a flag could be screwed up by interrupts
348 at inopportune times. */
350 /* If this flag is non-zero, we check mouse_moved to see when the
351 mouse moves, and motion events will appear in the input stream. If
352 it is zero, mouse motion is ignored. */
353 static int do_mouse_tracking
;
355 /* The window system handling code should set this if the mouse has
356 moved since the last call to the mouse_position_hook. Calling that
357 hook should clear this. Code assumes that if this is set, it can
358 call mouse_position_hook to get the promised position, so don't set
359 it unless you're prepared to substantiate the claim! */
362 /* True iff there is an event in kbd_buffer, or if mouse tracking is
363 enabled and there is a new mouse position in the mouse movement
364 buffer. Note that if this is false, that doesn't mean that there
365 is readable input; all the events in the queue might be button-up
366 events, and do_mouse_tracking might be off. */
367 #define EVENT_QUEUES_EMPTY \
368 ((kbd_fetch_ptr == kbd_store_ptr) && (!do_mouse_tracking || !mouse_moved))
371 /* Symbols to head events. */
372 Lisp_Object Qmouse_movement
;
373 Lisp_Object Qscroll_bar_movement
;
374 Lisp_Object Qswitch_frame
;
376 /* Symbols to denote kinds of events. */
377 Lisp_Object Qfunction_key
;
378 Lisp_Object Qmouse_click
;
379 /* Lisp_Object Qmouse_movement; - also an event header */
381 /* Properties of event headers. */
382 Lisp_Object Qevent_kind
;
383 Lisp_Object Qevent_symbol_elements
;
385 Lisp_Object Qmenu_enable
;
387 /* An event header symbol HEAD may have a property named
388 Qevent_symbol_element_mask, which is of the form (BASE MODIFIERS);
389 BASE is the base, unmodified version of HEAD, and MODIFIERS is the
390 mask of modifiers applied to it. If present, this is used to help
391 speed up parse_modifiers. */
392 Lisp_Object Qevent_symbol_element_mask
;
394 /* An unmodified event header BASE may have a property named
395 Qmodifier_cache, which is an alist mapping modifier masks onto
396 modified versions of BASE. If present, this helps speed up
398 Lisp_Object Qmodifier_cache
;
400 /* Symbols to use for parts of windows. */
401 Lisp_Object Qmode_line
;
402 Lisp_Object Qvertical_line
;
403 Lisp_Object Qvertical_scroll_bar
;
404 Lisp_Object Qmenu_bar
;
406 extern Lisp_Object Qmenu_enable
;
408 Lisp_Object
recursive_edit_unwind (), command_loop ();
409 Lisp_Object
Fthis_command_keys ();
410 Lisp_Object Qextended_command_history
;
412 /* Address (if not 0) of EMACS_TIME to zero out if a SIGIO interrupt
414 EMACS_TIME
*input_available_clear_time
;
416 /* Nonzero means use SIGIO interrupts; zero means use CBREAK mode.
417 Default is 1 if INTERRUPT_INPUT is defined. */
420 /* Nonzero while interrupts are temporarily deferred during redisplay. */
421 int interrupts_deferred
;
423 /* nonzero means use ^S/^Q for flow control. */
426 /* Allow m- file to inhibit use of FIONREAD. */
427 #ifdef BROKEN_FIONREAD
431 /* We are unable to use interrupts if FIONREAD is not available,
432 so flush SIGIO so we won't try. */
439 /* If we support X Windows, turn on the code to poll periodically
440 to detect C-g. It isn't actually used when doing interrupt input. */
441 #ifdef HAVE_X_WINDOWS
442 #define POLL_FOR_INPUT
445 /* Global variable declarations. */
447 /* Function for init_keyboard to call with no args (if nonzero). */
448 void (*keyboard_init_hook
) ();
450 static int read_avail_input ();
451 static void get_input_pending ();
452 static int readable_events ();
453 static Lisp_Object
read_char_x_menu_prompt ();
454 static Lisp_Object
read_char_minibuf_menu_prompt ();
455 static Lisp_Object
make_lispy_event ();
456 static Lisp_Object
make_lispy_movement ();
457 static Lisp_Object
modify_event_symbol ();
458 static Lisp_Object
make_lispy_switch_frame ();
460 /* > 0 if we are to echo keystrokes. */
461 static int echo_keystrokes
;
463 /* Nonzero means echo each character as typed. */
464 static int immediate_echo
;
466 /* The text we're echoing in the modeline - partial key sequences,
467 usually. '\0'-terminated. This really shouldn't have a fixed size. */
468 static char echobuf
[300];
470 /* Where to append more text to echobuf if we want to. */
471 static char *echoptr
;
473 #define min(a,b) ((a)<(b)?(a):(b))
474 #define max(a,b) ((a)>(b)?(a):(b))
476 /* Install the string STR as the beginning of the string of echoing,
477 so that it serves as a prompt for the next character.
478 Also start echoing. */
483 int len
= strlen (str
);
484 if (len
> sizeof echobuf
- 4)
485 len
= sizeof echobuf
- 4;
486 bcopy (str
, echobuf
, len
);
487 echoptr
= echobuf
+ len
;
493 /* Add C to the echo string, if echoing is going on.
494 C can be a character, which is printed prettily ("M-C-x" and all that
495 jazz), or a symbol, whose name is printed. */
500 extern char *push_key_description ();
509 /* If someone has passed us a composite event, use its head symbol. */
512 if (XTYPE (c
) == Lisp_Int
)
514 if (ptr
- echobuf
> sizeof echobuf
- 6)
517 ptr
= push_key_description (XINT (c
), ptr
);
519 else if (XTYPE (c
) == Lisp_Symbol
)
521 struct Lisp_String
*name
= XSYMBOL (c
)->name
;
522 if (((ptr
- echobuf
) + name
->size
+ 4) > sizeof echobuf
)
524 bcopy (name
->data
, ptr
, name
->size
);
528 if (echoptr
== echobuf
&& EQ (c
, Vhelp_char
))
530 strcpy (ptr
, " (Type ? for further options)");
541 /* Temporarily add a dash to the end of the echo string if it's not
542 empty, so that it serves as a mini-prompt for the very next character. */
546 if (!immediate_echo
&& echoptr
== echobuf
)
548 /* Do nothing if not echoing at all. */
552 /* Put a dash at the end of the buffer temporarily,
553 but make it go away when the next character is added. */
560 /* Display the current echo string, and begin echoing if not already
570 for (i
= 0; i
< this_command_key_count
; i
++)
571 echo_char (XVECTOR (this_command_keys
)->contents
[i
]);
579 if (waiting_for_input
&& !NILP (Vquit_flag
))
580 quit_throw_to_read_char ();
583 /* Turn off echoing, for the start of a new command. */
591 /* Return the length of the current echo string. */
596 return echoptr
- echobuf
;
599 /* Truncate the current echo message to its first LEN chars.
600 This and echo_char get used by read_key_sequence when the user
601 switches frames while entering a key sequence. */
608 echoptr
= echobuf
+ len
;
612 /* Functions for manipulating this_command_keys. */
614 add_command_key (key
)
617 int size
= XVECTOR (this_command_keys
)->size
;
619 if (this_command_key_count
>= size
)
621 Lisp_Object new_keys
= Fmake_vector (make_number (size
* 2), Qnil
);
623 bcopy (XVECTOR (this_command_keys
)->contents
,
624 XVECTOR (new_keys
)->contents
,
625 size
* sizeof (Lisp_Object
));
627 this_command_keys
= new_keys
;
630 XVECTOR (this_command_keys
)->contents
[this_command_key_count
++] = key
;
636 int count
= specpdl_ptr
- specpdl
;
639 if (command_loop_level
> 0)
641 specbind (Qstandard_output
, Qt
);
642 specbind (Qstandard_input
, Qt
);
645 val
= command_loop ();
647 Fsignal (Qquit
, Qnil
);
649 return unbind_to (count
, Qnil
);
652 /* When an auto-save happens, record the "time", and don't do again soon. */
655 last_auto_save
= num_nonmacro_input_chars
;
658 DEFUN ("recursive-edit", Frecursive_edit
, Srecursive_edit
, 0, 0, "",
659 "Invoke the editor command loop recursively.\n\
660 To get out of the recursive edit, a command can do `(throw 'exit nil)';\n\
661 that tells this function to return.\n\
662 Alternately, `(throw 'exit t)' makes this function signal an error.\n\
663 This function is called by the editor initialization to begin editing.")
666 int count
= specpdl_ptr
- specpdl
;
669 command_loop_level
++;
670 update_mode_lines
= 1;
672 record_unwind_protect (recursive_edit_unwind
,
674 && current_buffer
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
678 return unbind_to (count
, Qnil
);
682 recursive_edit_unwind (buffer
)
686 Fset_buffer (buffer
);
688 command_loop_level
--;
689 update_mode_lines
= 1;
697 Lisp_Object errmsg
, tail
, errname
, file_error
;
704 Vstandard_output
= Qt
;
705 Vstandard_input
= Qt
;
706 Vexecuting_macro
= Qnil
;
707 echo_area_glyphs
= 0;
709 /* If the window system or terminal frame hasn't been initialized
710 yet, or we're not interactive, it's best to dump this message out
711 to stderr and exit. */
712 if (! FRAME_MESSAGE_BUF (selected_frame
)
714 stream
= Qexternal_debugging_output
;
722 errname
= Fcar (data
);
724 if (EQ (errname
, Qerror
))
727 if (!CONSP (data
)) data
= Qnil
;
728 errmsg
= Fcar (data
);
733 errmsg
= Fget (errname
, Qerror_message
);
734 file_error
= Fmemq (Qfile_error
,
735 Fget (errname
, Qerror_conditions
));
738 /* Print an error message including the data items.
739 This is done by printing it into a scratch buffer
740 and then making a copy of the text in the buffer. */
742 if (!CONSP (data
)) data
= Qnil
;
746 /* For file-error, make error message by concatenating
747 all the data items. They are all strings. */
748 if (!NILP (file_error
) && !NILP (tail
))
749 errmsg
= XCONS (tail
)->car
, tail
= XCONS (tail
)->cdr
;
751 if (XTYPE (errmsg
) == Lisp_String
)
752 Fprinc (errmsg
, stream
);
754 write_string_1 ("peculiar error", -1, stream
);
756 for (i
= 0; CONSP (tail
); tail
= Fcdr (tail
), i
++)
758 write_string_1 (i
? ", " : ": ", 2, stream
);
759 if (!NILP (file_error
))
760 Fprinc (Fcar (tail
), stream
);
762 Fprin1 (Fcar (tail
), stream
);
766 /* If the window system or terminal frame hasn't been initialized
767 yet, or we're in -batch mode, this error should cause Emacs to exit. */
768 if (! FRAME_MESSAGE_BUF (selected_frame
)
772 Fkill_emacs (make_number (-1));
777 Vinhibit_quit
= Qnil
;
778 return make_number (0);
781 Lisp_Object
command_loop_1 ();
782 Lisp_Object
command_loop_2 ();
783 Lisp_Object
top_level_1 ();
785 /* Entry to editor-command-loop.
786 This level has the catches for exiting/returning to editor command loop.
787 It returns nil to exit recursive edit, t to abort it. */
792 if (command_loop_level
> 0 || minibuf_level
> 0)
794 return internal_catch (Qexit
, command_loop_2
, Qnil
);
799 internal_catch (Qtop_level
, top_level_1
, Qnil
);
800 internal_catch (Qtop_level
, command_loop_2
, Qnil
);
802 /* End of file in -batch run causes exit here. */
808 /* Here we catch errors in execution of commands within the
809 editing loop, and reenter the editing loop.
810 When there is an error, cmd_error runs and returns a non-nil
811 value to us. A value of nil means that cmd_loop_1 itself
812 returned due to end of file (or end of kbd macro). */
817 register Lisp_Object val
;
820 val
= internal_condition_case (command_loop_1
, Qerror
, cmd_error
);
829 return Feval (Vtop_level
);
835 /* On entry to the outer level, run the startup file */
836 if (!NILP (Vtop_level
))
837 internal_condition_case (top_level_2
, Qerror
, cmd_error
);
838 else if (!NILP (Vpurify_flag
))
839 message ("Bare impure Emacs (standard Lisp code not loaded)");
841 message ("Bare Emacs (standard Lisp code not loaded)");
845 DEFUN ("top-level", Ftop_level
, Stop_level
, 0, 0, "",
846 "Exit all recursive editing levels.")
849 Fthrow (Qtop_level
, Qnil
);
852 DEFUN ("exit-recursive-edit", Fexit_recursive_edit
, Sexit_recursive_edit
, 0, 0, "",
853 "Exit from the innermost recursive edit or minibuffer.")
856 if (command_loop_level
> 0 || minibuf_level
> 0)
857 Fthrow (Qexit
, Qnil
);
859 error ("No recursive edit is in progress");
862 DEFUN ("abort-recursive-edit", Fabort_recursive_edit
, Sabort_recursive_edit
, 0, 0, "",
863 "Abort the command that requested this recursive edit or minibuffer input.")
866 if (command_loop_level
> 0 || minibuf_level
> 0)
869 error ("No recursive edit is in progress");
872 /* This is the actual command reading loop,
873 sans error-handling encapsulation. */
875 Lisp_Object
Fcommand_execute ();
876 static int read_key_sequence ();
881 Lisp_Object cmd
, tem
;
884 Lisp_Object keybuf
[30];
889 struct buffer
*prev_buffer
;
892 Vdeactivate_mark
= Qnil
;
893 waiting_for_input
= 0;
896 /* Don't clear out last_command at the beginning of a macro. */
897 if (XTYPE (Vexecuting_macro
) != Lisp_String
)
902 this_command_key_count
= 0;
904 /* Make sure this hook runs after commands that get errors and
905 throw to top level. */
906 if (!NILP (Vpost_command_hook
))
909 /* If we get an error during the post-command-hook,
910 cause post-command-hook to be nil. */
911 tem
= Vpost_command_hook
;
912 Vpost_command_hook
= Qnil
;
914 call1 (Vrun_hooks
, Qpost_command_hook
);
916 Vpost_command_hook
= tem
;
921 /* Install chars successfully executed in kbd macro. */
923 if (defining_kbd_macro
&& NILP (Vprefix_arg
))
924 finalize_kbd_macro_chars ();
926 /* Make sure the current window's buffer is selected. */
927 if (XBUFFER (XWINDOW (selected_window
)->buffer
) != current_buffer
)
928 set_buffer_internal (XBUFFER (XWINDOW (selected_window
)->buffer
));
930 /* Display any malloc warning that just came out. Use while because
931 displaying one warning can cause another. */
933 while (pending_malloc_warning
)
934 display_malloc_warning ();
938 Vdeactivate_mark
= Qnil
;
940 /* If minibuffer on and echo area in use,
941 wait 2 sec and redraw minibuffer. */
943 if (minibuf_level
&& echo_area_glyphs
)
945 /* Bind inhibit-quit to t so that C-g gets read in
946 rather than quitting back to the minibuffer. */
947 int count
= specpdl_ptr
- specpdl
;
948 specbind (Qinhibit_quit
, Qt
);
949 Fsit_for (make_number (2), Qnil
, Qnil
);
950 unbind_to (count
, Qnil
);
952 echo_area_glyphs
= 0;
954 if (!NILP (Vquit_flag
))
957 unread_command_events
= Fcons (make_number (quit_char
), Qnil
);
962 alloca (0); /* Cause a garbage collection now */
963 /* Since we can free the most stuff here. */
964 #endif /* C_ALLOCA */
968 /* Select the frame that the last event came from. Usually,
969 switch-frame events will take care of this, but if some lisp
970 code swallows a switch-frame event, we'll fix things up here.
971 Is this a good idea? */
972 if (XTYPE (internal_last_event_frame
) == Lisp_Frame
973 && XFRAME (internal_last_event_frame
) != selected_frame
)
974 Fselect_frame (internal_last_event_frame
, Qnil
);
977 /* If it has changed current-menubar from previous value,
978 really recompute the menubar from the value. */
979 if (! NILP (Vlucid_menu_bar_dirty_flag
)
980 && !NILP (Ffboundp (Qrecompute_lucid_menubar
)))
981 call0 (Qrecompute_lucid_menubar
);
983 #if 0 /* This is done in xdisp.c now. */
985 for (tem
= Vframe_list
; CONSP (tem
); tem
= XCONS (tem
)->cdr
)
987 struct frame
*f
= XFRAME (XCONS (tem
)->car
);
988 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
990 /* If the user has switched buffers or windows, we need to
991 recompute to reflect the new bindings. But we'll
992 recompute when update_mode_lines is set too; that means
993 that people can use force-mode-line-update to request
994 that the menu bar be recomputed. The adverse effect on
995 the rest of the redisplay algorithm is about the same as
996 windows_or_buffers_changed anyway. */
997 if (windows_or_buffers_changed
999 || (XFASTINT (w
->last_modified
) < MODIFF
1000 && (XFASTINT (w
->last_modified
)
1001 <= XBUFFER (w
->buffer
)->save_modified
)))
1003 struct buffer
*prev
= current_buffer
;
1004 current_buffer
= XBUFFER (w
->buffer
);
1005 FRAME_MENU_BAR_ITEMS (f
) = menu_bar_items ();
1006 current_buffer
= prev
;
1009 #endif /* MULTI_FRAME */
1012 /* Read next key sequence; i gets its length. */
1013 i
= read_key_sequence (keybuf
, (sizeof keybuf
/ sizeof (keybuf
[0])), Qnil
);
1017 /* Now we have read a key sequence of length I,
1018 or else I is 0 and we found end of file. */
1020 if (i
== 0) /* End of file -- happens only in */
1021 return Qnil
; /* a kbd macro, at the end. */
1022 /* -1 means read_key_sequence got a menu that was rejected.
1023 Just loop around and read another command. */
1027 this_command_key_count
= 0;
1031 last_command_char
= keybuf
[i
- 1];
1033 /* If the previous command tried to force a specific window-start,
1034 forget about that, in case this command moves point far away
1035 from that position. */
1036 XWINDOW (selected_window
)->force_start
= Qnil
;
1038 cmd
= read_key_sequence_cmd
;
1039 if (!NILP (Vexecuting_macro
))
1041 if (!NILP (Vquit_flag
))
1043 Vexecuting_macro
= Qt
;
1044 QUIT
; /* Make some noise. */
1045 /* Will return since macro now empty. */
1049 /* Do redisplay processing after this command except in special
1050 cases identified below that set no_redisplay to 1. */
1053 prev_buffer
= current_buffer
;
1054 prev_modiff
= MODIFF
;
1056 /* Execute the command. */
1059 if (!NILP (Vpre_command_hook
))
1062 /* If we get an error during the pre-command-hook,
1063 cause pre-command-hook to be nil. */
1064 tem
= Vpre_command_hook
;
1065 Vpre_command_hook
= Qnil
;
1067 call1 (Vrun_hooks
, Qpre_command_hook
);
1069 Vpre_command_hook
= tem
;
1072 if (NILP (this_command
))
1074 /* nil means key is undefined. */
1076 defining_kbd_macro
= 0;
1077 update_mode_lines
= 1;
1083 if (NILP (Vprefix_arg
) && ! no_direct
)
1085 /* Recognize some common commands in common situations and
1086 do them directly. */
1087 if (EQ (this_command
, Qforward_char
) && point
< ZV
)
1089 struct Lisp_Vector
*dp
1090 = window_display_table (XWINDOW (selected_window
));
1091 lose
= FETCH_CHAR (point
);
1094 ? (VECTORP (DISP_CHAR_VECTOR (dp
, lose
))
1095 && XVECTOR (DISP_CHAR_VECTOR (dp
, lose
))->size
== 1)
1096 : (lose
>= 0x20 && lose
< 0x7f))
1097 && (XFASTINT (XWINDOW (selected_window
)->last_modified
)
1099 && (XFASTINT (XWINDOW (selected_window
)->last_point
)
1101 && !windows_or_buffers_changed
1102 && EQ (current_buffer
->selective_display
, Qnil
)
1103 && !detect_input_pending ()
1104 && NILP (Vexecuting_macro
))
1105 no_redisplay
= direct_output_forward_char (1);
1108 else if (EQ (this_command
, Qbackward_char
) && point
> BEGV
)
1110 struct Lisp_Vector
*dp
1111 = window_display_table (XWINDOW (selected_window
));
1113 lose
= FETCH_CHAR (point
);
1115 ? (XTYPE (DISP_CHAR_VECTOR (dp
, lose
)) != Lisp_Vector
1116 && XVECTOR (DISP_CHAR_VECTOR (dp
, lose
))->size
== 1)
1117 : (lose
>= 0x20 && lose
< 0x7f))
1118 && (XFASTINT (XWINDOW (selected_window
)->last_modified
)
1120 && (XFASTINT (XWINDOW (selected_window
)->last_point
)
1122 && !windows_or_buffers_changed
1123 && EQ (current_buffer
->selective_display
, Qnil
)
1124 && !detect_input_pending ()
1125 && NILP (Vexecuting_macro
))
1126 no_redisplay
= direct_output_forward_char (-1);
1129 else if (EQ (this_command
, Qself_insert_command
)
1130 /* Try this optimization only on ascii keystrokes. */
1131 && XTYPE (last_command_char
) == Lisp_Int
)
1133 unsigned char c
= XINT (last_command_char
);
1135 if (NILP (Vexecuting_macro
) &&
1136 !EQ (minibuf_window
, selected_window
))
1138 if (!nonundocount
|| nonundocount
>= 20)
1145 lose
= (XFASTINT (XWINDOW (selected_window
)->last_modified
)
1147 || (XFASTINT (XWINDOW (selected_window
)->last_point
)
1149 || MODIFF
<= current_buffer
->save_modified
1150 || windows_or_buffers_changed
1151 || !EQ (current_buffer
->selective_display
, Qnil
)
1152 || detect_input_pending ()
1153 || !NILP (Vexecuting_macro
);
1154 if (internal_self_insert (c
, 0))
1160 (point
== ZV
|| FETCH_CHAR (point
) == '\n'))
1162 struct Lisp_Vector
*dp
1163 = window_display_table (XWINDOW (selected_window
));
1168 Lisp_Object obj
= DISP_CHAR_VECTOR (dp
, lose
);
1170 if (XTYPE (obj
) == Lisp_Vector
1171 && XVECTOR (obj
)->size
== 1
1172 && (XTYPE (obj
= XVECTOR (obj
)->contents
[0])
1175 direct_output_for_insert (XINT (obj
));
1179 if (lose
>= 0x20 && lose
<= 0x7e)
1180 no_redisplay
= direct_output_for_insert (lose
);
1187 /* Here for a command that isn't executed directly */
1190 if (NILP (Vprefix_arg
))
1192 Fcommand_execute (this_command
, Qnil
);
1197 if (!NILP (Vpost_command_hook
))
1198 call1 (Vrun_hooks
, Qpost_command_hook
);
1200 /* If there is a prefix argument,
1201 1) We don't want last_command to be ``universal-argument''
1202 (that would be dumb), so don't set last_command,
1203 2) we want to leave echoing on so that the prefix will be
1204 echoed as part of this key sequence, so don't call
1206 3) we want to leave this_command_key_count non-zero, so that
1207 read_char will realize that it is re-reading a character, and
1208 not echo it a second time. */
1209 if (NILP (Vprefix_arg
))
1211 last_command
= this_command
;
1213 this_command_key_count
= 0;
1216 if (!NILP (current_buffer
->mark_active
))
1218 if (!NILP (Vdeactivate_mark
) && !NILP (Vtransient_mark_mode
))
1220 current_buffer
->mark_active
= Qnil
;
1221 call1 (Vrun_hooks
, intern ("deactivate-mark-hook"));
1223 else if (current_buffer
!= prev_buffer
|| MODIFF
!= prev_modiff
)
1224 call1 (Vrun_hooks
, intern ("activate-mark-hook"));
1229 /* Number of seconds between polling for input. */
1232 /* Nonzero means polling for input is temporarily suppressed. */
1233 int poll_suppress_count
;
1235 #ifdef POLL_FOR_INPUT
1236 int polling_for_input
;
1238 /* Handle an alarm once each second and read pending input
1239 so as to handle a C-g if it comces in. */
1242 input_poll_signal ()
1244 if (interrupt_input_blocked
== 0
1245 && !waiting_for_input
)
1246 read_avail_input (0);
1247 signal (SIGALRM
, input_poll_signal
);
1248 alarm (polling_period
);
1253 /* Begin signals to poll for input, if they are appropriate.
1254 This function is called unconditionally from various places. */
1258 #ifdef POLL_FOR_INPUT
1259 if (read_socket_hook
&& !interrupt_input
)
1261 poll_suppress_count
--;
1262 if (poll_suppress_count
== 0)
1264 signal (SIGALRM
, input_poll_signal
);
1265 polling_for_input
= 1;
1266 alarm (polling_period
);
1272 /* Turn off polling. */
1276 #ifdef POLL_FOR_INPUT
1277 if (read_socket_hook
&& !interrupt_input
)
1279 if (poll_suppress_count
== 0)
1281 polling_for_input
= 0;
1284 poll_suppress_count
++;
1289 /* Set the value of poll_suppress_count to COUNT
1290 and start or stop polling accordingly. */
1293 set_poll_suppress_count (count
)
1296 #ifdef POLL_FOR_INPUT
1297 if (count
== 0 && poll_suppress_count
!= 0)
1299 poll_suppress_count
= 1;
1302 else if (count
!= 0 && poll_suppress_count
== 0)
1306 poll_suppress_count
= count
;
1310 /* Applying the control modifier to CHARACTER. */
1315 /* Save the upper bits here. */
1316 int upper
= c
& ~0177;
1320 /* Everything in the columns containing the upper-case letters
1321 denotes a control character. */
1322 if (c
>= 0100 && c
< 0140)
1326 /* Set the shift modifier for a control char
1327 made from a shifted letter. But only for letters! */
1328 if (oc
>= 'A' && oc
<= 'Z')
1329 c
|= shift_modifier
;
1332 /* The lower-case letters denote control characters too. */
1333 else if (c
>= 'a' && c
<= 'z')
1336 /* Include the bits for control and shift
1337 only if the basic ASCII code can't indicate them. */
1341 /* Replace the high bits. */
1342 c
|= (upper
& ~ctrl_modifier
);
1349 /* Input of single characters from keyboard */
1351 Lisp_Object
print_help ();
1352 static Lisp_Object
kbd_buffer_get_event ();
1354 /* read a character from the keyboard; call the redisplay if needed */
1355 /* commandflag 0 means do not do auto-saving, but do do redisplay.
1356 -1 means do not do redisplay, but do do autosaving.
1359 /* The arguments MAPS and NMAPS are for menu prompting.
1360 MAPS is an array of keymaps; NMAPS is the length of MAPS.
1362 PREV_EVENT is the previous input event, or nil if we are reading
1363 the first event of a key sequence.
1365 If USED_MOUSE_MENU is non-zero, then we set *USED_MOUSE_MENU to 1
1366 if we used a mouse menu to read the input, or zero otherwise. If
1367 USED_MOUSE_MENU is zero, *USED_MOUSE_MENU is left alone.
1369 Value is t if we showed a menu and the user rejected it. */
1372 read_char (commandflag
, nmaps
, maps
, prev_event
, used_mouse_menu
)
1376 Lisp_Object prev_event
;
1377 int *used_mouse_menu
;
1379 register Lisp_Object c
;
1383 if (CONSP (unread_command_events
))
1385 c
= XCONS (unread_command_events
)->car
;
1386 unread_command_events
= XCONS (unread_command_events
)->cdr
;
1388 if (this_command_key_count
== 0)
1394 if (unread_command_char
!= -1)
1396 XSET (c
, Lisp_Int
, unread_command_char
);
1397 unread_command_char
= -1;
1399 if (this_command_key_count
== 0)
1405 if (!NILP (Vexecuting_macro
))
1408 /* We set this to Qmacro; since that's not a frame, nobody will
1409 try to switch frames on us, and the selected window will
1412 Since this event came from a macro, it would be misleading to
1413 leave internal_last_event_frame set to wherever the last
1414 real event came from. Normally, a switch-frame event selects
1415 internal_last_event_frame after each command is read, but
1416 events read from a macro should never cause a new frame to be
1418 Vlast_event_frame
= internal_last_event_frame
= Qmacro
;
1421 /* Exit the macro if we are at the end.
1422 Also, some things replace the macro with t
1423 to force an early exit. */
1424 if (EQ (Vexecuting_macro
, Qt
)
1425 || executing_macro_index
>= XFASTINT (Flength (Vexecuting_macro
)))
1427 XSET (c
, Lisp_Int
, -1);
1431 c
= Faref (Vexecuting_macro
, make_number (executing_macro_index
));
1432 if (XTYPE (Vexecuting_macro
) == Lisp_String
1433 && (XINT (c
) & 0x80))
1434 XFASTINT (c
) = CHAR_META
| (XINT (c
) & ~0x80);
1436 executing_macro_index
++;
1441 if (!NILP (unread_switch_frame
))
1443 c
= unread_switch_frame
;
1444 unread_switch_frame
= Qnil
;
1446 /* This event should make it into this_command_keys, and get echoed
1447 again, so we go to reread_first, rather than reread. */
1451 if (commandflag
>= 0 && !input_pending
&& !detect_input_pending ())
1452 prepare_menu_bars ();
1454 /* Save outer setjmp data, in case called recursively. */
1455 save_getcjmp (save_jump
);
1459 if (commandflag
>= 0 && !input_pending
&& !detect_input_pending ())
1462 if (_setjmp (getcjmp
))
1464 XSET (c
, Lisp_Int
, quit_char
);
1466 XSET (internal_last_event_frame
, Lisp_Frame
, selected_frame
);
1467 Vlast_event_frame
= internal_last_event_frame
;
1469 /* If we report the quit char as an event,
1470 don't do so more than once. */
1471 if (!NILP (Vinhibit_quit
))
1477 /* Message turns off echoing unless more keystrokes turn it on again. */
1478 if (echo_area_glyphs
&& *echo_area_glyphs
&& echo_area_glyphs
!= echobuf
)
1481 /* If already echoing, continue. */
1484 /* Try reading a character via menu prompting in the minibuf.
1485 Try this before the sit-for, because the sit-for
1486 would do the wrong thing if we are supposed to do
1487 menu prompting. If EVENT_HAS_PARAMETERS then we are reading
1488 after a mouse event so don't try a minibuf menu. */
1490 if (nmaps
> 0 && INTERACTIVE
&&
1491 !NILP (prev_event
) && ! EVENT_HAS_PARAMETERS (prev_event
))
1493 c
= read_char_minibuf_menu_prompt (commandflag
, nmaps
, maps
);
1494 if ( ! NILP(c
) ) return c
;
1497 /* If in middle of key sequence and minibuffer not active,
1498 start echoing if enough time elapses. */
1499 if (minibuf_level
== 0 && !immediate_echo
&& this_command_key_count
> 0
1501 && echo_keystrokes
> 0
1502 && (echo_area_glyphs
== 0 || *echo_area_glyphs
== 0))
1506 /* After a mouse event, start echoing right away.
1507 This is because we are probably about to display a menu,
1508 and we don't want to delay before doing so. */
1509 if (EVENT_HAS_PARAMETERS (prev_event
))
1513 tem0
= sit_for (echo_keystrokes
, 0, 1, 1);
1519 /* Maybe auto save due to number of keystrokes or idle time. */
1521 if (commandflag
!= 0
1522 && auto_save_interval
> 0
1523 && num_nonmacro_input_chars
- last_auto_save
> max (auto_save_interval
, 20)
1524 && !detect_input_pending ())
1527 save_getcjmp (temp
);
1528 Fdo_auto_save (Qnil
, Qnil
);
1529 restore_getcjmp (temp
);
1532 /* Try reading using an X menu.
1533 This is never confused with reading using the minibuf because the recursive
1534 call of read_char in read_char_minibuf_menu_prompt does not pass on
1536 if (nmaps
> 0 && INTERACTIVE
&&
1537 !NILP (prev_event
) && EVENT_HAS_PARAMETERS (prev_event
))
1538 c
= read_char_x_menu_prompt (nmaps
, maps
, prev_event
, used_mouse_menu
);
1540 /* Slow down auto saves logarithmically in size of current buffer,
1541 and garbage collect while we're at it. */
1542 if (INTERACTIVE
&& NILP (c
))
1544 int delay_level
, buffer_size
;
1546 if (! MINI_WINDOW_P (XWINDOW (selected_window
)))
1547 last_non_minibuf_size
= Z
- BEG
;
1548 buffer_size
= (last_non_minibuf_size
>> 8) + 1;
1550 while (buffer_size
> 64)
1551 delay_level
++, buffer_size
-= buffer_size
>> 2;
1552 if (delay_level
< 4) delay_level
= 4;
1553 /* delay_level is 4 for files under around 50k, 7 at 100k,
1554 9 at 200k, 11 at 300k, and 12 at 500k. It is 15 at 1 meg. */
1556 /* Auto save if enough time goes by without input. */
1557 if (commandflag
!= 0
1558 && num_nonmacro_input_chars
> last_auto_save
1559 && XTYPE (Vauto_save_timeout
) == Lisp_Int
1560 && XINT (Vauto_save_timeout
) > 0)
1563 int delay
= delay_level
* XFASTINT (Vauto_save_timeout
) / 4;
1564 tem0
= sit_for (delay
, 0, 1, 1);
1568 save_getcjmp (temp
);
1569 Fdo_auto_save (Qnil
, Qnil
);
1570 restore_getcjmp (temp
);
1572 /* If we have auto-saved and there is still no input
1573 available, garbage collect if there has been enough
1574 consing going on to make it worthwhile. */
1575 if (!detect_input_pending ()
1576 && consing_since_gc
> gc_cons_threshold
/ 2)
1578 Fgarbage_collect ();
1579 /* prepare_menu_bars isn't safe here, but it should
1580 also be unnecessary. */
1587 /* Actually read a character, waiting if necessary. */
1590 c
= kbd_buffer_get_event ();
1593 if (commandflag
>= 0 && !input_pending
&& !detect_input_pending ())
1597 /* Terminate Emacs in batch mode if at eof. */
1598 if (noninteractive
&& XTYPE (c
) == Lisp_Int
&& XINT (c
) < 0)
1599 Fkill_emacs (make_number (1));
1601 if (XTYPE (c
) == Lisp_Int
)
1603 /* Add in any extra modifiers, where appropriate. */
1604 if ((extra_keyboard_modifiers
& CHAR_CTL
)
1605 || ((extra_keyboard_modifiers
& 0177) < ' '
1606 && (extra_keyboard_modifiers
& 0177) != 0))
1607 XSETINT (c
, make_ctrl_char (XINT (c
)));
1609 /* Transfer any other modifier bits directly from
1610 extra_keyboard_modifiers to c. Ignore the actual character code
1611 in the low 16 bits of extra_keyboard_modifiers. */
1612 XSETINT (c
, XINT (c
) | (extra_keyboard_modifiers
& ~0xff7f & ~CHAR_CTL
));
1617 restore_getcjmp (save_jump
);
1621 echo_area_glyphs
= 0;
1623 /* Handle things that only apply to characters. */
1624 if (XTYPE (c
) == Lisp_Int
)
1626 /* If kbd_buffer_get_event gave us an EOF, return that. */
1630 if (XTYPE (Vkeyboard_translate_table
) == Lisp_String
1631 && XSTRING (Vkeyboard_translate_table
)->size
> XFASTINT (c
))
1632 XSETINT (c
, XSTRING (Vkeyboard_translate_table
)->data
[XFASTINT (c
)]);
1636 XVECTOR (recent_keys
)->contents
[recent_keys_index
] = c
;
1637 if (++recent_keys_index
>= NUM_RECENT_KEYS
)
1638 recent_keys_index
= 0;
1640 /* Write c to the dribble file. If c is a lispy event, write
1641 the event's symbol to the dribble file, in <brackets>. Bleaugh.
1642 If you, dear reader, have a better idea, you've got the source. :-) */
1645 if (XTYPE (c
) == Lisp_Int
)
1646 putc (XINT (c
), dribble
);
1649 Lisp_Object dribblee
= c
;
1651 /* If it's a structured event, take the event header. */
1652 dribblee
= EVENT_HEAD (dribblee
);
1654 if (XTYPE (dribblee
) == Lisp_Symbol
)
1656 putc ('<', dribble
);
1657 fwrite (XSYMBOL (dribblee
)->name
->data
, sizeof (char),
1658 XSYMBOL (dribblee
)->name
->size
,
1660 putc ('>', dribble
);
1667 store_kbd_macro_char (c
);
1669 num_nonmacro_input_chars
++;
1674 /* Record this character as part of the current key.
1675 Don't record mouse motion; it should never matter. */
1676 if (! (EVENT_HAS_PARAMETERS (c
)
1677 && EQ (EVENT_HEAD_KIND (EVENT_HEAD (c
)), Qmouse_movement
)))
1680 add_command_key (c
);
1683 /* Re-reading in the middle of a command */
1685 last_input_char
= c
;
1688 /* Process the help character specially if enabled */
1689 if (EQ (c
, Vhelp_char
) && !NILP (Vhelp_form
))
1692 count
= specpdl_ptr
- specpdl
;
1694 record_unwind_protect (Fset_window_configuration
,
1695 Fcurrent_window_configuration (Qnil
));
1697 tem0
= Feval (Vhelp_form
);
1698 if (XTYPE (tem0
) == Lisp_String
)
1699 internal_with_output_to_temp_buffer ("*Help*", print_help
, tem0
);
1702 c
= read_char (0, 0, 0, Qnil
, 0);
1703 /* Remove the help from the frame */
1704 unbind_to (count
, Qnil
);
1705 prepare_menu_bars ();
1707 if (EQ (c
, make_number (040)))
1710 c
= read_char (0, 0, 0, Qnil
, 0);
1721 Fprinc (object
, Qnil
);
1725 /* Copy out or in the info on where C-g should throw to.
1726 This is used when running Lisp code from within get_char,
1727 in case get_char is called recursively.
1728 See read_process_output. */
1733 bcopy (getcjmp
, temp
, sizeof getcjmp
);
1736 restore_getcjmp (temp
)
1739 bcopy (temp
, getcjmp
, sizeof getcjmp
);
1743 /* Restore mouse tracking enablement. See Ftrack_mouse for the only use
1744 of this function. */
1746 tracking_off (old_value
)
1747 Lisp_Object old_value
;
1749 if (! XFASTINT (old_value
))
1751 do_mouse_tracking
= 0;
1753 /* Redisplay may have been preempted because there was input
1754 available, and it assumes it will be called again after the
1755 input has been processed. If the only input available was
1756 the sort that we have just disabled, then we need to call
1758 if (!readable_events ())
1760 prepare_menu_bars ();
1761 redisplay_preserve_echo_area ();
1762 get_input_pending (&input_pending
);
1767 DEFUN ("track-mouse", Ftrack_mouse
, Strack_mouse
, 0, UNEVALLED
, 0,
1768 "Evaluate BODY with mouse movement events enabled.\n\
1769 Within a `track-mouse' form, mouse motion generates input events that\n\
1770 you can read with `read-event'.\n\
1771 Normally, mouse motion is ignored.")
1775 int count
= specpdl_ptr
- specpdl
;
1778 XSET (val
, Lisp_Int
, do_mouse_tracking
);
1779 record_unwind_protect (tracking_off
, val
);
1781 do_mouse_tracking
= 1;
1783 val
= Fprogn (args
);
1784 return unbind_to (count
, val
);
1787 /* Low level keyboard/mouse input.
1788 kbd_buffer_store_event places events in kbd_buffer, and
1789 kbd_buffer_get_event retrieves them.
1790 mouse_moved indicates when the mouse has moved again, and
1791 *mouse_position_hook provides the mouse position. */
1793 /* Return true iff there are any events in the queue that read-char
1794 would return. If this returns false, a read-char would block. */
1798 return ! EVENT_QUEUES_EMPTY
;
1801 /* Set this for debugging, to have a way to get out */
1804 /* Store an event obtained at interrupt level into kbd_buffer, fifo */
1807 kbd_buffer_store_event (event
)
1808 register struct input_event
*event
;
1810 if (event
->kind
== no_event
)
1813 if (event
->kind
== ascii_keystroke
)
1815 register int c
= event
->code
& 0377;
1817 if (event
->modifiers
& ctrl_modifier
)
1818 c
= make_ctrl_char (c
);
1820 c
|= (event
->modifiers
1821 & (meta_modifier
| alt_modifier
1822 | hyper_modifier
| super_modifier
));
1826 extern SIGTYPE
interrupt_signal ();
1829 /* If this results in a quit_char being returned to Emacs as
1830 input, set Vlast_event_frame properly. If this doesn't
1831 get returned to Emacs as an event, the next event read
1832 will set Vlast_event_frame again, so this is safe to do. */
1835 = FRAME_FOCUS_FRAME (XFRAME (event
->frame_or_window
));
1838 internal_last_event_frame
= event
->frame_or_window
;
1840 internal_last_event_frame
= focus
;
1841 Vlast_event_frame
= internal_last_event_frame
;
1845 last_event_timestamp
= event
->timestamp
;
1846 interrupt_signal ();
1850 if (c
&& c
== stop_character
)
1857 if (kbd_store_ptr
- kbd_buffer
== KBD_BUFFER_SIZE
)
1858 kbd_store_ptr
= kbd_buffer
;
1860 /* Don't let the very last slot in the buffer become full,
1861 since that would make the two pointers equal,
1862 and that is indistinguishable from an empty buffer.
1863 Discard the event if it would fill the last slot. */
1864 if (kbd_fetch_ptr
- 1 != kbd_store_ptr
)
1866 kbd_store_ptr
->kind
= event
->kind
;
1867 if (event
->kind
== selection_request_event
)
1869 /* We must not use the ordinary copying code for this case,
1870 since `part' is an enum and copying it might not copy enough
1872 bcopy (event
, kbd_store_ptr
, sizeof (*event
));
1876 kbd_store_ptr
->code
= event
->code
;
1877 kbd_store_ptr
->part
= event
->part
;
1878 kbd_store_ptr
->frame_or_window
= event
->frame_or_window
;
1879 kbd_store_ptr
->modifiers
= event
->modifiers
;
1880 kbd_store_ptr
->x
= event
->x
;
1881 kbd_store_ptr
->y
= event
->y
;
1882 kbd_store_ptr
->timestamp
= event
->timestamp
;
1884 (XVECTOR (kbd_buffer_frame_or_window
)->contents
[kbd_store_ptr
1886 = event
->frame_or_window
);
1892 /* Read one event from the event buffer, waiting if necessary.
1893 The value is a Lisp object representing the event.
1894 The value is nil for an event that should be ignored,
1895 or that was handled here.
1896 We always read and discard one event. */
1899 kbd_buffer_get_event ()
1907 XSET (obj
, Lisp_Int
, c
);
1911 /* Wait until there is input available. */
1914 if (!EVENT_QUEUES_EMPTY
)
1917 /* If the quit flag is set, then read_char will return
1918 quit_char, so that counts as "available input." */
1919 if (!NILP (Vquit_flag
))
1920 quit_throw_to_read_char ();
1922 /* One way or another, wait until input is available; then, if
1923 interrupt handlers have not read it, read it now. */
1926 wait_for_kbd_input ();
1928 /* Note SIGIO has been undef'd if FIONREAD is missing. */
1932 if (EVENT_QUEUES_EMPTY
)
1934 Lisp_Object minus_one
;
1936 XSET (minus_one
, Lisp_Int
, -1);
1937 wait_reading_process_input (0, 0, minus_one
, 1);
1939 if (!interrupt_input
&& EVENT_QUEUES_EMPTY
)
1941 read_avail_input (0);
1944 #endif /* not VMS */
1947 /* At this point, we know that there is a readable event available
1948 somewhere. If the event queue is empty, then there must be a
1949 mouse movement enabled and available. */
1950 if (kbd_fetch_ptr
!= kbd_store_ptr
)
1952 struct input_event
*event
;
1954 event
= ((kbd_fetch_ptr
< kbd_buffer
+ KBD_BUFFER_SIZE
)
1958 last_event_timestamp
= event
->timestamp
;
1962 /* These two kinds of events get special handling
1963 and don't actually appear to the command loop.
1964 We return nil for them. */
1965 if (event
->kind
== selection_request_event
)
1968 x_handle_selection_request (event
);
1969 kbd_fetch_ptr
= event
+ 1;
1971 /* We're getting selection request events, but we don't have
1977 else if (event
->kind
== selection_clear_event
)
1980 x_handle_selection_clear (event
);
1981 kbd_fetch_ptr
= event
+ 1;
1983 /* We're getting selection request events, but we don't have
1989 else if (event
->kind
== delete_window_event
)
1991 Lisp_Object tail
, frame
;
1994 /* If the user destroys the only frame, Emacs should exit.
1995 Count visible frames and iconified frames. */
1996 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1998 frame
= XCONS (tail
)->car
;
1999 if (XTYPE (frame
) != Lisp_Frame
|| EQ (frame
, event
->frame_or_window
))
2002 if (FRAME_VISIBLE_P (f
) || FRAME_ICONIFIED_P (f
))
2009 Fdelete_frame (event
->frame_or_window
, Qt
);
2010 kbd_fetch_ptr
= event
+ 1;
2013 /* Just discard these, by returning nil.
2014 (They shouldn't be found in the buffer,
2015 but on some machines it appears they do show up.) */
2016 else if (event
->kind
== no_event
)
2017 kbd_fetch_ptr
= event
+ 1;
2019 /* If this event is on a different frame, return a switch-frame this
2020 time, and leave the event in the queue for next time. */
2024 Lisp_Object frame
= event
->frame_or_window
;
2027 if (XTYPE (frame
) == Lisp_Window
)
2028 frame
= WINDOW_FRAME (XWINDOW (frame
));
2030 focus
= FRAME_FOCUS_FRAME (XFRAME (frame
));
2034 if (! EQ (frame
, internal_last_event_frame
)
2035 && XFRAME (frame
) != selected_frame
)
2036 obj
= make_lispy_switch_frame (frame
);
2037 internal_last_event_frame
= frame
;
2038 #endif /* MULTI_FRAME */
2040 /* If we didn't decide to make a switch-frame event, go ahead
2041 and build a real event from the queue entry. */
2045 obj
= make_lispy_event (event
);
2047 /* Wipe out this event, to catch bugs. */
2048 event
->kind
= no_event
;
2049 (XVECTOR (kbd_buffer_frame_or_window
)->contents
[event
- kbd_buffer
]
2052 kbd_fetch_ptr
= event
+ 1;
2056 /* Try generating a mouse motion event. */
2057 else if (do_mouse_tracking
&& mouse_moved
)
2060 Lisp_Object bar_window
;
2061 enum scroll_bar_part part
;
2065 (*mouse_position_hook
) (&f
, &bar_window
, &part
, &x
, &y
, &time
);
2070 /* Decide if we should generate a switch-frame event. Don't
2071 generate switch-frame events for motion outside of all Emacs
2075 Lisp_Object frame
= FRAME_FOCUS_FRAME (f
);
2078 XSET (frame
, Lisp_Frame
, f
);
2080 if (! EQ (frame
, internal_last_event_frame
)
2081 && XFRAME (frame
) != selected_frame
)
2082 obj
= make_lispy_switch_frame (frame
);
2083 internal_last_event_frame
= frame
;
2087 /* If we didn't decide to make a switch-frame event, go ahead and
2088 return a mouse-motion event. */
2090 obj
= make_lispy_movement (f
, bar_window
, part
, x
, y
, time
);
2093 /* We were promised by the above while loop that there was
2094 something for us to read! */
2097 input_pending
= readable_events ();
2100 Vlast_event_frame
= internal_last_event_frame
;
2106 /* Process any events that are not user-visible,
2107 then return, without reading any user-visible events. */
2112 while (kbd_fetch_ptr
!= kbd_store_ptr
)
2114 struct input_event
*event
;
2116 event
= ((kbd_fetch_ptr
< kbd_buffer
+ KBD_BUFFER_SIZE
)
2120 last_event_timestamp
= event
->timestamp
;
2122 /* These two kinds of events get special handling
2123 and don't actually appear to the command loop. */
2124 if (event
->kind
== selection_request_event
)
2127 x_handle_selection_request (event
);
2128 kbd_fetch_ptr
= event
+ 1;
2130 /* We're getting selection request events, but we don't have
2136 else if (event
->kind
== selection_clear_event
)
2139 x_handle_selection_clear (event
);
2140 kbd_fetch_ptr
= event
+ 1;
2142 /* We're getting selection request events, but we don't have
2151 get_input_pending (&input_pending
);
2154 /* Caches for modify_event_symbol. */
2155 static Lisp_Object accent_key_syms
;
2156 static Lisp_Object vendor_key_syms
;
2157 static Lisp_Object func_key_syms
;
2158 static Lisp_Object mouse_syms
;
2160 Lisp_Object Vvendor_key_alist
;
2162 /* This is a list of keysym codes for special "accent" characters.
2163 It parallels lispy_accent_keys. */
2165 static int lispy_accent_codes
[] =
2167 #ifdef XK_dead_circumflex
2172 #ifdef XK_dead_grave
2177 #ifdef XK_dead_tilde
2182 #ifdef XK_dead_diaeresis
2187 #ifdef XK_dead_macron
2192 #ifdef XK_dead_degree
2197 #ifdef XK_dead_acute
2202 #ifdef XK_dead_cedilla
2207 #ifdef XK_dead_breve
2212 #ifdef XK_dead_ogonek
2217 #ifdef XK_dead_caron
2222 #ifdef XK_dead_doubleacute
2223 XK_dead_doubleacute
,
2227 #ifdef XK_dead_abovedot
2234 /* This is a list of Lisp names for special "accent" characters.
2235 It parallels lispy_accent_codes. */
2237 static char *lispy_accent_keys
[] =
2254 /* You'll notice that this table is arranged to be conveniently
2255 indexed by X Windows keysym values. */
2256 static char *lispy_function_keys
[] =
2258 /* X Keysym value */
2260 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff00 */
2268 0, 0, 0, /* 0xff10 */
2270 0, 0, 0, 0, 0, 0, 0,
2273 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff20...2f */
2274 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff30...3f */
2275 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xff40...4f */
2277 "home", /* 0xff50 */ /* IsCursorKey */
2288 "select", /* 0xff60 */ /* IsMiscFunctionKey */
2299 "break", /* 0xff6b */
2301 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
2303 0, 0, 0, 0, 0, 0, 0, 0, "kp-numlock", /* 0xff7f */
2304 "kp-space", /* 0xff80 */ /* IsKeypadKey */
2305 0, 0, 0, 0, 0, 0, 0, 0,
2306 "kp-tab", /* 0xff89 */
2308 "kp-enter", /* 0xff8d */
2310 "kp-f1", /* 0xff91 */
2315 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
2316 "kp-multiply", /* 0xffaa */
2321 "kp-divide", /* 0xffaf */
2322 "kp-0", /* 0xffb0 */
2323 "kp-1", "kp-2", "kp-3", "kp-4", "kp-5", "kp-6", "kp-7", "kp-8", "kp-9",
2326 "kp-equal", /* 0xffbd */
2327 "f1", /* 0xffbe */ /* IsFunctionKey */
2329 "f3", "f4", "f5", "f6", "f7", "f8", "f9", "f10", /* 0xffc0 */
2330 "f11", "f12", "f13", "f14", "f15", "f16", "f17", "f18",
2331 "f19", "f20", "f21", "f22", "f23", "f24", "f25", "f26", /* 0xffd0 */
2332 "f27", "f28", "f29", "f30", "f31", "f32", "f33", "f34",
2333 "f35", 0, 0, 0, 0, 0, 0, 0, /* 0xffe0 */
2334 0, 0, 0, 0, 0, 0, 0, 0,
2335 0, 0, 0, 0, 0, 0, 0, 0, /* 0xfff0 */
2336 0, 0, 0, 0, 0, 0, 0, "delete"
2339 static char *lispy_mouse_names
[] =
2341 "mouse-1", "mouse-2", "mouse-3", "mouse-4", "mouse-5"
2344 /* Scroll bar parts. */
2345 Lisp_Object Qabove_handle
, Qhandle
, Qbelow_handle
;
2347 /* An array of scroll bar parts, indexed by an enum scroll_bar_part value. */
2348 Lisp_Object
*scroll_bar_parts
[] = {
2349 &Qabove_handle
, &Qhandle
, &Qbelow_handle
2353 /* A vector, indexed by button number, giving the down-going location
2354 of currently depressed buttons, both scroll bar and non-scroll bar.
2356 The elements have the form
2357 (BUTTON-NUMBER MODIFIER-MASK . REST)
2358 where REST is the cdr of a position as it would be reported in the event.
2360 The make_lispy_event function stores positions here to tell the
2361 difference between click and drag events, and to store the starting
2362 location to be included in drag events. */
2364 static Lisp_Object button_down_location
;
2366 /* Information about the most recent up-going button event: Which
2367 button, what location, and what time. */
2369 static int last_mouse_button
;
2370 static int last_mouse_x
;
2371 static int last_mouse_y
;
2372 static unsigned long button_down_time
;
2374 /* The maximum time between clicks to make a double-click,
2375 or Qnil to disable double-click detection,
2376 or Qt for no time limit. */
2377 Lisp_Object Vdouble_click_time
;
2379 /* The number of clicks in this multiple-click. */
2381 int double_click_count
;
2383 /* Given a struct input_event, build the lisp event which represents
2384 it. If EVENT is 0, build a mouse movement event from the mouse
2385 movement buffer, which should have a movement event in it.
2387 Note that events must be passed to this function in the order they
2388 are received; this function stores the location of button presses
2389 in order to build drag events when the button is released. */
2392 make_lispy_event (event
)
2393 struct input_event
*event
;
2397 #ifdef SWITCH_ENUM_BUG
2398 switch ((int) event
->kind
)
2400 switch (event
->kind
)
2403 /* A simple keystroke. */
2404 case ascii_keystroke
:
2406 int c
= event
->code
& 0377;
2407 /* Turn ASCII characters into control characters
2409 if (event
->modifiers
& ctrl_modifier
)
2410 c
= make_ctrl_char (c
);
2412 /* Add in the other modifier bits. We took care of ctrl_modifier
2413 just above, and the shift key was taken care of by the X code,
2414 and applied to control characters by make_ctrl_char. */
2415 c
|= (event
->modifiers
2416 & (meta_modifier
| alt_modifier
2417 | hyper_modifier
| super_modifier
));
2418 button_down_time
= 0;
2422 /* A function key. The symbol may need to have modifier prefixes
2424 case non_ascii_keystroke
:
2425 button_down_time
= 0;
2427 for (i
= 0; i
< sizeof (lispy_accent_codes
) / sizeof (int); i
++)
2428 if (event
->code
== lispy_accent_codes
[i
])
2429 return modify_event_symbol (i
,
2431 Qfunction_key
, Qnil
,
2432 lispy_accent_keys
, &accent_key_syms
,
2433 (sizeof (lispy_accent_keys
)
2434 / sizeof (lispy_accent_keys
[0])));
2436 /* Handle vendor-specific keysyms. */
2437 if (event
->code
& (1 << 28))
2439 /* We need to use an alist rather than a vector as the cache
2440 since we can't make a vector long enuf. */
2441 if (NILP (vendor_key_syms
))
2442 vendor_key_syms
= Fcons (Qnil
, Qnil
);
2443 return modify_event_symbol (event
->code
& 0xffffff,
2445 Qfunction_key
, Vvendor_key_alist
,
2446 0, &vendor_key_syms
, 0xffffff);
2449 return modify_event_symbol (event
->code
- 0xff00,
2451 Qfunction_key
, Qnil
,
2452 lispy_function_keys
, &func_key_syms
,
2453 (sizeof (lispy_function_keys
)
2454 / sizeof (lispy_function_keys
[0])));
2457 /* A mouse click. Figure out where it is, decide whether it's
2458 a press, click or drag, and build the appropriate structure. */
2460 case scroll_bar_click
:
2462 int button
= event
->code
;
2464 Lisp_Object position
;
2465 Lisp_Object
*start_pos_ptr
;
2466 Lisp_Object start_pos
;
2468 if (button
< 0 || button
>= NUM_MOUSE_BUTTONS
)
2471 /* Build the position as appropriate for this mouse click. */
2472 if (event
->kind
== mouse_click
)
2475 FRAME_PTR f
= XFRAME (event
->frame_or_window
);
2477 = window_from_coordinates (f
, XINT (event
->x
), XINT (event
->y
),
2481 if (XINT (event
->y
) < FRAME_MENU_BAR_LINES (f
))
2485 items
= FRAME_MENU_BAR_ITEMS (f
);
2486 for (; CONSP (items
); items
= XCONS (items
)->cdr
)
2488 Lisp_Object pos
, string
;
2489 pos
= Fcdr (Fcdr (Fcar (items
)));
2490 string
= Fcar (Fcdr (Fcar (items
)));
2491 if (XINT (event
->x
) >= XINT (pos
)
2492 && XINT (event
->x
) < XINT (pos
) + XSTRING (string
)->size
)
2496 = Fcons (event
->frame_or_window
,
2498 Fcons (Fcons (event
->x
, event
->y
),
2499 Fcons (make_number (event
->timestamp
),
2503 return Fcons (Fcar (Fcar (items
)),
2504 Fcons (position
, Qnil
));
2506 return Fcons (Qnil
, Fcons (position
, Qnil
));
2508 else if (XTYPE (window
) != Lisp_Window
)
2513 (XINT (event
->x
) - XINT (XWINDOW (window
)->left
)));
2515 (XINT (event
->y
) - XINT (XWINDOW (window
)->top
)));
2520 posn
= Qvertical_line
;
2522 XSET (posn
, Lisp_Int
,
2523 buffer_posn_from_coords (XWINDOW (window
),
2531 Fcons (Fcons (event
->x
, event
->y
),
2532 Fcons (make_number (event
->timestamp
),
2537 Lisp_Object window
= event
->frame_or_window
;
2538 Lisp_Object portion_whole
= Fcons (event
->x
, event
->y
);
2539 Lisp_Object part
= *scroll_bar_parts
[(int) event
->part
];
2543 Fcons (Qvertical_scroll_bar
,
2544 Fcons (portion_whole
,
2545 Fcons (make_number (event
->timestamp
),
2550 start_pos_ptr
= &XVECTOR (button_down_location
)->contents
[button
];
2552 start_pos
= *start_pos_ptr
;
2553 *start_pos_ptr
= Qnil
;
2555 is_double
= (button
== last_mouse_button
2556 && XINT (event
->x
) == last_mouse_x
2557 && XINT (event
->y
) == last_mouse_y
2558 && button_down_time
!= 0
2559 && (EQ (Vdouble_click_time
, Qt
)
2560 || (INTEGERP (Vdouble_click_time
)
2561 && ((int)(event
->timestamp
- button_down_time
)
2562 < XINT (Vdouble_click_time
)))));
2563 last_mouse_button
= button
;
2564 last_mouse_x
= XINT (event
->x
);
2565 last_mouse_y
= XINT (event
->y
);
2567 /* If this is a button press, squirrel away the location, so
2568 we can decide later whether it was a click or a drag. */
2569 if (event
->modifiers
& down_modifier
)
2573 double_click_count
++;
2574 event
->modifiers
|= ((double_click_count
> 2)
2579 double_click_count
= 1;
2580 button_down_time
= event
->timestamp
;
2581 *start_pos_ptr
= Fcopy_alist (position
);
2584 /* Now we're releasing a button - check the co-ordinates to
2585 see if this was a click or a drag. */
2586 else if (event
->modifiers
& up_modifier
)
2588 /* If we did not see a down before this up,
2589 ignore the up. Probably this happened because
2590 the down event chose a menu item.
2591 It would be an annoyance to treat the release
2592 of the button that chose the menu item
2593 as a separate event. */
2595 if (XTYPE (start_pos
) != Lisp_Cons
)
2598 event
->modifiers
&= ~up_modifier
;
2599 #if 0 /* Formerly we treated an up with no down as a click event. */
2600 if (XTYPE (start_pos
) != Lisp_Cons
)
2601 event
->modifiers
|= click_modifier
;
2605 /* The third element of every position should be the (x,y)
2607 Lisp_Object down
= Fnth (make_number (2), start_pos
);
2609 if (EQ (event
->x
, XCONS (down
)->car
)
2610 && EQ (event
->y
, XCONS (down
)->cdr
))
2612 if (is_double
&& double_click_count
> 1)
2613 event
->modifiers
|= ((double_click_count
> 2)
2617 event
->modifiers
|= click_modifier
;
2621 button_down_time
= 0;
2622 event
->modifiers
|= drag_modifier
;
2627 /* Every mouse event should either have the down_modifier or
2628 the up_modifier set. */
2632 /* Get the symbol we should use for the mouse click. */
2634 = modify_event_symbol (button
,
2637 lispy_mouse_names
, &mouse_syms
,
2638 (sizeof (lispy_mouse_names
)
2639 / sizeof (lispy_mouse_names
[0])));
2641 if (event
->modifiers
& drag_modifier
)
2646 else if (event
->modifiers
& (double_modifier
| triple_modifier
))
2649 Fcons (make_number (double_click_count
),
2658 /* The 'kind' field of the event is something we don't recognize. */
2665 make_lispy_movement (frame
, bar_window
, part
, x
, y
, time
)
2667 Lisp_Object bar_window
;
2668 enum scroll_bar_part part
;
2672 /* Is it a scroll bar movement? */
2673 if (frame
&& ! NILP (bar_window
))
2675 Lisp_Object part_sym
= *scroll_bar_parts
[(int) part
];
2677 return Fcons (Qscroll_bar_movement
,
2678 (Fcons (Fcons (bar_window
,
2679 Fcons (Qvertical_scroll_bar
,
2680 Fcons (Fcons (x
, y
),
2681 Fcons (make_number (time
),
2687 /* Or is it an ordinary mouse movement? */
2691 Lisp_Object window
=
2693 ? window_from_coordinates (frame
, XINT (x
), XINT (y
), &area
)
2697 if (XTYPE (window
) == Lisp_Window
)
2699 XSETINT (x
, XINT (x
) - XINT (XWINDOW (window
)->left
));
2700 XSETINT (y
, XINT (y
) - XINT (XWINDOW (window
)->top
));
2705 posn
= Qvertical_line
;
2707 XSET (posn
, Lisp_Int
,
2708 buffer_posn_from_coords (XWINDOW (window
),
2709 XINT (x
), XINT (y
)));
2711 else if (frame
!= 0)
2713 XSET (window
, Lisp_Frame
, frame
);
2724 return Fcons (Qmouse_movement
,
2725 Fcons (Fcons (window
,
2727 Fcons (Fcons (x
, y
),
2728 Fcons (make_number (time
),
2734 /* Construct a switch frame event. */
2736 make_lispy_switch_frame (frame
)
2739 return Fcons (Qswitch_frame
, Fcons (frame
, Qnil
));
2742 /* Manipulating modifiers. */
2744 /* Parse the name of SYMBOL, and return the set of modifiers it contains.
2746 If MODIFIER_END is non-zero, set *MODIFIER_END to the position in
2747 SYMBOL's name of the end of the modifiers; the string from this
2748 position is the unmodified symbol name.
2750 This doesn't use any caches. */
2752 parse_modifiers_uncached (symbol
, modifier_end
)
2756 struct Lisp_String
*name
;
2760 CHECK_SYMBOL (symbol
, 1);
2763 name
= XSYMBOL (symbol
)->name
;
2766 for (i
= 0; i
+2 <= name
->size
; )
2767 switch (name
->data
[i
])
2769 #define SINGLE_LETTER_MOD(bit) \
2770 if (name->data[i+1] != '-') \
2771 goto no_more_modifiers; \
2776 SINGLE_LETTER_MOD (alt_modifier
);
2780 SINGLE_LETTER_MOD (ctrl_modifier
);
2784 SINGLE_LETTER_MOD (hyper_modifier
);
2788 SINGLE_LETTER_MOD (meta_modifier
);
2792 SINGLE_LETTER_MOD (shift_modifier
);
2796 SINGLE_LETTER_MOD (super_modifier
);
2800 if (i
+ 5 > name
->size
)
2801 goto no_more_modifiers
;
2802 if (! strncmp (name
->data
+ i
, "drag-", 5))
2804 modifiers
|= drag_modifier
;
2807 else if (! strncmp (name
->data
+ i
, "down-", 5))
2809 modifiers
|= down_modifier
;
2812 else if (i
+ 7 <= name
->size
2813 && ! strncmp (name
->data
+ i
, "double-", 7))
2815 modifiers
|= double_modifier
;
2819 goto no_more_modifiers
;
2823 if (i
+ 7 > name
->size
)
2824 goto no_more_modifiers
;
2825 if (! strncmp (name
->data
+ i
, "triple-", 7))
2827 modifiers
|= triple_modifier
;
2831 goto no_more_modifiers
;
2835 goto no_more_modifiers
;
2837 #undef SINGLE_LETTER_MOD
2841 /* Should we include the `click' modifier? */
2842 if (! (modifiers
& (down_modifier
| drag_modifier
2843 | double_modifier
| triple_modifier
))
2844 && i
+ 7 == name
->size
2845 && strncmp (name
->data
+ i
, "mouse-", 6) == 0
2846 && ('0' <= name
->data
[i
+ 6] && name
->data
[i
+ 6] <= '9'))
2847 modifiers
|= click_modifier
;
2856 /* Return a symbol whose name is the modifier prefixes for MODIFIERS
2857 prepended to the string BASE[0..BASE_LEN-1].
2858 This doesn't use any caches. */
2860 apply_modifiers_uncached (modifiers
, base
, base_len
)
2865 /* Since BASE could contain nulls, we can't use intern here; we have
2866 to use Fintern, which expects a genuine Lisp_String, and keeps a
2869 (char *) alloca (sizeof ("A-C-H-M-S-s-down-drag-double-triple-"));
2875 /* Only the event queue may use the `up' modifier; it should always
2876 be turned into a click or drag event before presented to lisp code. */
2877 if (modifiers
& up_modifier
)
2880 if (modifiers
& alt_modifier
) { *p
++ = 'A'; *p
++ = '-'; }
2881 if (modifiers
& ctrl_modifier
) { *p
++ = 'C'; *p
++ = '-'; }
2882 if (modifiers
& hyper_modifier
) { *p
++ = 'H'; *p
++ = '-'; }
2883 if (modifiers
& meta_modifier
) { *p
++ = 'M'; *p
++ = '-'; }
2884 if (modifiers
& shift_modifier
) { *p
++ = 'S'; *p
++ = '-'; }
2885 if (modifiers
& super_modifier
) { *p
++ = 's'; *p
++ = '-'; }
2886 if (modifiers
& double_modifier
) { strcpy (p
, "double-"); p
+= 7; }
2887 if (modifiers
& triple_modifier
) { strcpy (p
, "triple-"); p
+= 7; }
2888 if (modifiers
& down_modifier
) { strcpy (p
, "down-"); p
+= 5; }
2889 if (modifiers
& drag_modifier
) { strcpy (p
, "drag-"); p
+= 5; }
2890 /* The click modifier is denoted by the absence of other modifiers. */
2894 mod_len
= p
- new_mods
;
2898 Lisp_Object new_name
= make_uninit_string (mod_len
+ base_len
);
2900 bcopy (new_mods
, XSTRING (new_name
)->data
, mod_len
);
2901 bcopy (base
, XSTRING (new_name
)->data
+ mod_len
, base_len
);
2903 return Fintern (new_name
, Qnil
);
2908 static char *modifier_names
[] =
2910 "up", "down", "drag", "click", "double", "triple", 0, 0,
2911 0, 0, 0, 0, 0, 0, 0, 0,
2912 0, 0, "alt", "super", "hyper", "shift", "control", "meta"
2914 #define NUM_MOD_NAMES (sizeof (modifier_names) / sizeof (modifier_names[0]))
2916 static Lisp_Object modifier_symbols
;
2918 /* Return the list of modifier symbols corresponding to the mask MODIFIERS. */
2920 lispy_modifier_list (modifiers
)
2923 Lisp_Object modifier_list
;
2926 modifier_list
= Qnil
;
2927 for (i
= 0; (1<<i
) <= modifiers
&& i
< NUM_MOD_NAMES
; i
++)
2928 if (modifiers
& (1<<i
))
2929 modifier_list
= Fcons (XVECTOR (modifier_symbols
)->contents
[i
],
2932 return modifier_list
;
2936 /* Parse the modifiers on SYMBOL, and return a list like (UNMODIFIED MASK),
2937 where UNMODIFIED is the unmodified form of SYMBOL,
2938 MASK is the set of modifiers present in SYMBOL's name.
2939 This is similar to parse_modifiers_uncached, but uses the cache in
2940 SYMBOL's Qevent_symbol_element_mask property, and maintains the
2941 Qevent_symbol_elements property. */
2943 parse_modifiers (symbol
)
2946 Lisp_Object elements
= Fget (symbol
, Qevent_symbol_element_mask
);
2948 if (CONSP (elements
))
2953 int modifiers
= parse_modifiers_uncached (symbol
, &end
);
2954 Lisp_Object unmodified
2955 = Fintern (make_string (XSYMBOL (symbol
)->name
->data
+ end
,
2956 XSYMBOL (symbol
)->name
->size
- end
),
2960 if (modifiers
& ~((1<<VALBITS
) - 1))
2962 XFASTINT (mask
) = modifiers
;
2963 elements
= Fcons (unmodified
, Fcons (mask
, Qnil
));
2965 /* Cache the parsing results on SYMBOL. */
2966 Fput (symbol
, Qevent_symbol_element_mask
,
2968 Fput (symbol
, Qevent_symbol_elements
,
2969 Fcons (unmodified
, lispy_modifier_list (modifiers
)));
2971 /* Since we know that SYMBOL is modifiers applied to unmodified,
2972 it would be nice to put that in unmodified's cache.
2973 But we can't, since we're not sure that parse_modifiers is
2980 /* Apply the modifiers MODIFIERS to the symbol BASE.
2981 BASE must be unmodified.
2983 This is like apply_modifiers_uncached, but uses BASE's
2984 Qmodifier_cache property, if present. It also builds
2985 Qevent_symbol_elements properties, since it has that info anyway.
2987 apply_modifiers copies the value of BASE's Qevent_kind property to
2988 the modified symbol. */
2990 apply_modifiers (modifiers
, base
)
2994 Lisp_Object cache
, index
, entry
, new_symbol
;
2996 /* Mask out upper bits. We don't know where this value's been. */
2997 modifiers
&= (1<<VALBITS
) - 1;
2999 /* The click modifier never figures into cache indices. */
3000 cache
= Fget (base
, Qmodifier_cache
);
3001 XFASTINT (index
) = (modifiers
& ~click_modifier
);
3002 entry
= Fassq (index
, cache
);
3005 new_symbol
= XCONS (entry
)->cdr
;
3008 /* We have to create the symbol ourselves. */
3009 new_symbol
= apply_modifiers_uncached (modifiers
,
3010 XSYMBOL (base
)->name
->data
,
3011 XSYMBOL (base
)->name
->size
);
3013 /* Add the new symbol to the base's cache. */
3014 entry
= Fcons (index
, new_symbol
);
3015 Fput (base
, Qmodifier_cache
, Fcons (entry
, cache
));
3017 /* We have the parsing info now for free, so add it to the caches. */
3018 XFASTINT (index
) = modifiers
;
3019 Fput (new_symbol
, Qevent_symbol_element_mask
,
3020 Fcons (base
, Fcons (index
, Qnil
)));
3021 Fput (new_symbol
, Qevent_symbol_elements
,
3022 Fcons (base
, lispy_modifier_list (modifiers
)));
3025 /* Make sure this symbol is of the same kind as BASE.
3027 You'd think we could just set this once and for all when we
3028 intern the symbol above, but reorder_modifiers may call us when
3029 BASE's property isn't set right; we can't assume that just
3030 because it has a Qmodifier_cache property it must have its
3031 Qevent_kind set right as well. */
3032 if (NILP (Fget (new_symbol
, Qevent_kind
)))
3034 Lisp_Object kind
= Fget (base
, Qevent_kind
);
3037 Fput (new_symbol
, Qevent_kind
, kind
);
3044 /* Given a symbol whose name begins with modifiers ("C-", "M-", etc),
3045 return a symbol with the modifiers placed in the canonical order.
3046 Canonical order is alphabetical, except for down and drag, which
3047 always come last. The 'click' modifier is never written out.
3049 Fdefine_key calls this to make sure that (for example) C-M-foo
3050 and M-C-foo end up being equivalent in the keymap. */
3053 reorder_modifiers (symbol
)
3056 /* It's hopefully okay to write the code this way, since everything
3057 will soon be in caches, and no consing will be done at all. */
3058 Lisp_Object parsed
= parse_modifiers (symbol
);
3060 return apply_modifiers (XCONS (XCONS (parsed
)->cdr
)->car
,
3061 XCONS (parsed
)->car
);
3065 /* For handling events, we often want to produce a symbol whose name
3066 is a series of modifier key prefixes ("M-", "C-", etcetera) attached
3067 to some base, like the name of a function key or mouse button.
3068 modify_event_symbol produces symbols of this sort.
3070 NAME_TABLE should point to an array of strings, such that NAME_TABLE[i]
3071 is the name of the i'th symbol. TABLE_SIZE is the number of elements
3074 Alternatively, NAME_ALIST is an alist mapping codes into symbol names.
3075 NAME_ALIST is used if it is non-nil; otherwise NAME_TABLE is used.
3077 SYMBOL_TABLE should be a pointer to a Lisp_Object whose value will
3078 persist between calls to modify_event_symbol that it can use to
3079 store a cache of the symbols it's generated for this NAME_TABLE
3080 before. The object stored there may be a vector or an alist.
3082 SYMBOL_NUM is the number of the base name we want from NAME_TABLE.
3084 MODIFIERS is a set of modifier bits (as given in struct input_events)
3085 whose prefixes should be applied to the symbol name.
3087 SYMBOL_KIND is the value to be placed in the event_kind property of
3088 the returned symbol.
3090 The symbols we create are supposed to have an
3091 `event-symbol-elements' property, which lists the modifiers present
3092 in the symbol's name. */
3095 modify_event_symbol (symbol_num
, modifiers
, symbol_kind
, name_alist
,
3096 name_table
, symbol_table
, table_size
)
3099 Lisp_Object symbol_kind
;
3100 Lisp_Object name_alist
;
3102 Lisp_Object
*symbol_table
;
3106 Lisp_Object symbol_int
;
3108 XSET (symbol_int
, Lisp_Int
, symbol_num
);
3110 /* Is this a request for a valid symbol? */
3111 if (symbol_num
< 0 || symbol_num
>= table_size
)
3114 if (CONSP (*symbol_table
))
3115 value
= Fcdr (assq_no_quit (symbol_int
, *symbol_table
));
3117 /* If *symbol_table doesn't seem to be initialized properly, fix that.
3118 *symbol_table should be a lisp vector TABLE_SIZE elements long,
3119 where the Nth element is the symbol for NAME_TABLE[N], or nil if
3120 we've never used that symbol before. */
3123 if (! VECTORP (*symbol_table
)
3124 || XVECTOR (*symbol_table
)->size
!= table_size
)
3128 XFASTINT (size
) = table_size
;
3129 *symbol_table
= Fmake_vector (size
, Qnil
);
3132 value
= XVECTOR (*symbol_table
)->contents
[symbol_num
];
3135 /* Have we already used this symbol before? */
3138 /* No; let's create it. */
3139 if (!NILP (name_alist
))
3140 value
= Fassq (symbol_int
, name_alist
);
3141 else if (name_table
[symbol_num
])
3142 value
= intern (name_table
[symbol_num
]);
3146 sprintf (buf
, "key-%d", symbol_num
);
3147 value
= intern (buf
);
3150 if (CONSP (*symbol_table
))
3151 *symbol_table
= Fcons (value
, *symbol_table
);
3153 XVECTOR (*symbol_table
)->contents
[symbol_num
] = value
;
3155 /* Fill in the cache entries for this symbol; this also
3156 builds the Qevent_symbol_elements property, which the user
3158 apply_modifiers (modifiers
& click_modifier
, value
);
3159 Fput (value
, Qevent_kind
, symbol_kind
);
3162 /* Apply modifiers to that symbol. */
3163 return apply_modifiers (modifiers
, value
);
3167 /* Store into *addr a value nonzero if terminal input chars are available.
3168 Serves the purpose of ioctl (0, FIONREAD, addr)
3169 but works even if FIONREAD does not exist.
3170 (In fact, this may actually read some input.) */
3173 get_input_pending (addr
)
3176 /* First of all, have we already counted some input? */
3177 *addr
= !NILP (Vquit_flag
) || readable_events ();
3179 /* If input is being read as it arrives, and we have none, there is none. */
3180 if (*addr
> 0 || (interrupt_input
&& ! interrupts_deferred
))
3183 /* Try to read some input and see how much we get. */
3185 *addr
= !NILP (Vquit_flag
) || readable_events ();
3188 /* Interface to read_avail_input, blocking SIGIO if necessary. */
3191 gobble_input (expected
)
3196 if (interrupt_input
)
3199 mask
= sigblockx (SIGIO
);
3200 read_avail_input (expected
);
3205 read_avail_input (expected
);
3211 /* Read any terminal input already buffered up by the system
3212 into the kbd_buffer, but do not wait.
3214 EXPECTED should be nonzero if the caller knows there is some input.
3216 Except on VMS, all input is read by this function.
3217 If interrupt_input is nonzero, this function MUST be called
3218 only when SIGIO is blocked.
3220 Returns the number of keyboard chars read, or -1 meaning
3221 this is a bad time to try to read input. */
3224 read_avail_input (expected
)
3227 struct input_event buf
[KBD_BUFFER_SIZE
];
3231 if (read_socket_hook
)
3232 /* No need for FIONREAD or fcntl; just say don't wait. */
3233 nread
= (*read_socket_hook
) (0, buf
, KBD_BUFFER_SIZE
, expected
, expected
);
3236 /* Using KBD_BUFFER_SIZE - 1 here avoids reading more than
3237 the kbd_buffer can really hold. That may prevent loss
3238 of characters on some systems when input is stuffed at us. */
3239 unsigned char cbuf
[KBD_BUFFER_SIZE
- 1];
3242 nread
= dos_keysns ();
3243 if (nread
== 0) return 0;
3244 #else */ not MSDOS */
3246 /* Find out how much input is available. */
3247 if (ioctl (0, FIONREAD
, &nread
) < 0)
3248 /* Formerly simply reported no input, but that sometimes led to
3249 a failure of Emacs to terminate.
3250 SIGHUP seems appropriate if we can't reach the terminal. */
3251 /* ??? Is it really right to send the signal just to this process
3252 rather than to the whole process group?
3253 Perhaps on systems with FIONREAD Emacs is alone in its group. */
3254 kill (getpid (), SIGHUP
);
3257 if (nread
> sizeof cbuf
)
3258 nread
= sizeof cbuf
;
3259 #else /* no FIONREAD */
3260 #if defined(USG) || defined(DGUX)
3261 /* Read some input if available, but don't wait. */
3262 nread
= sizeof cbuf
;
3263 fcntl (fileno (stdin
), F_SETFL
, O_NDELAY
);
3268 #endif /* not MSDOS */
3270 /* Now read; for one reason or another, this will not block. */
3274 cbuf
[0] = dos_keyread();
3277 nread
= read (fileno (stdin
), cbuf
, nread
);
3280 /* The kernel sometimes fails to deliver SIGHUP for ptys.
3281 This looks incorrect, but it isn't, because _BSD causes
3282 O_NDELAY to be defined in fcntl.h as O_NONBLOCK,
3283 and that causes a value other than 0 when there is no input. */
3287 /* This code is wrong, but at least it gets the right results.
3288 Fix it for 19.23. */
3289 /* Retry the read if it is interrupted. */
3292 || ! (errno
== EAGAIN
|| errno
== EFAULT
3294 || ! (errno
== EAGAIN
3304 #if defined (USG) || defined (DGUX)
3305 fcntl (fileno (stdin
), F_SETFL
, 0);
3306 #endif /* USG or DGUX */
3307 #endif /* no FIONREAD */
3308 for (i
= 0; i
< nread
; i
++)
3310 buf
[i
].kind
= ascii_keystroke
;
3311 buf
[i
].modifiers
= 0;
3312 if (meta_key
== 1 && (cbuf
[i
] & 0x80))
3313 buf
[i
].modifiers
= meta_modifier
;
3317 XSET (buf
[i
].code
, Lisp_Int
, cbuf
[i
]);
3319 XSET (buf
[i
].frame_or_window
, Lisp_Frame
, selected_frame
);
3321 buf
[i
].frame_or_window
= Qnil
;
3326 /* Scan the chars for C-g and store them in kbd_buffer. */
3327 for (i
= 0; i
< nread
; i
++)
3329 kbd_buffer_store_event (&buf
[i
]);
3330 /* Don't look at input that follows a C-g too closely.
3331 This reduces lossage due to autorepeat on C-g. */
3332 if (buf
[i
].kind
== ascii_keystroke
3333 && XINT(buf
[i
].code
) == quit_char
)
3339 #endif /* not VMS */
3341 #ifdef SIGIO /* for entire page */
3342 /* Note SIGIO has been undef'd if FIONREAD is missing. */
3345 input_available_signal (signo
)
3348 /* Must preserve main program's value of errno. */
3349 int old_errno
= errno
;
3351 extern int select_alarmed
;
3355 /* USG systems forget handlers when they are used;
3356 must reestablish each time */
3357 signal (signo
, input_available_signal
);
3364 if (input_available_clear_time
)
3365 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3370 nread
= read_avail_input (1);
3371 /* -1 means it's not ok to read the input now.
3372 UNBLOCK_INPUT will read it later; now, avoid infinite loop.
3373 0 means there was no keyboard input available. */
3378 select_alarmed
= 1; /* Force the select emulator back to life */
3389 /* Send ourselves a SIGIO.
3391 This function exists so that the UNBLOCK_INPUT macro in
3392 blockinput.h can have some way to take care of input we put off
3393 dealing with, without assuming that every file which uses
3394 UNBLOCK_INPUT also has #included the files necessary to get SIGIO. */
3396 reinvoke_input_signal ()
3405 /* Return the prompt-string of a sparse keymap.
3406 This is the first element which is a string.
3407 Return nil if there is none. */
3415 register Lisp_Object tem
;
3417 if (XTYPE (tem
) == Lisp_String
)
3424 static Lisp_Object
menu_bar_item ();
3425 static Lisp_Object
menu_bar_one_keymap ();
3427 /* Return a list of menu items for a menu bar, appropriate
3428 to the current buffer.
3429 The elements have the form (KEY STRING . nil). */
3434 /* The number of keymaps we're scanning right now, and the number of
3435 keymaps we have allocated space for. */
3438 /* maps[0..nmaps-1] are the prefix definitions of KEYBUF[0..t-1]
3439 in the current keymaps, or nil where it is not a prefix. */
3442 Lisp_Object def
, tem
, tail
;
3449 /* In order to build the menus, we need to call the keymap
3450 accessors. They all call QUIT. But this function is called
3451 during redisplay, during which a quit is fatal. So inhibit
3452 quitting while building the menus.
3453 We do this instead of specbind because (1) errors will clear it anyway
3454 and (2) this avoids risk of specpdl overflow. */
3455 oquit
= Vinhibit_quit
;
3458 /* Build our list of keymaps.
3459 If we recognize a function key and replace its escape sequence in
3460 keybuf with its symbol, or if the sequence starts with a mouse
3461 click and we need to switch buffers, we jump back here to rebuild
3462 the initial keymaps from the current buffer. */
3466 nmaps
= current_minor_maps (0, &tmaps
) + 2;
3467 maps
= (Lisp_Object
*) alloca (nmaps
* sizeof (maps
[0]));
3468 bcopy (tmaps
, maps
, (nmaps
- 2) * sizeof (maps
[0]));
3469 #ifdef USE_TEXT_PROPERTIES
3470 maps
[nmaps
-2] = get_local_map (PT
, current_buffer
);
3472 maps
[nmaps
-2] = current_buffer
->keymap
;
3474 maps
[nmaps
-1] = current_global_map
;
3477 /* Look up in each map the dummy prefix key `menu-bar'. */
3481 for (mapno
= nmaps
- 1; mapno
>= 0; mapno
--)
3483 if (! NILP (maps
[mapno
]))
3484 def
= get_keyelt (access_keymap (maps
[mapno
], Qmenu_bar
, 1, 0));
3488 tem
= Fkeymapp (def
);
3490 result
= menu_bar_one_keymap (def
, result
);
3493 for (tail
= Vmenu_bar_final_items
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3497 elt
= Fassq (XCONS (tail
)->car
, result
);
3499 result
= Fcons (elt
, Fdelq (elt
, result
));
3502 result
= Fnreverse (result
);
3503 Vinhibit_quit
= oquit
;
3507 /* Scan one map KEYMAP, accumulating any menu items it defines
3508 that have not yet been seen in RESULT. Return the updated RESULT. */
3511 menu_bar_one_keymap (keymap
, result
)
3512 Lisp_Object keymap
, result
;
3514 Lisp_Object tail
, item
, key
, binding
, item_string
, table
;
3516 /* Loop over all keymap entries that have menu strings. */
3517 for (tail
= keymap
; XTYPE (tail
) == Lisp_Cons
; tail
= XCONS (tail
)->cdr
)
3519 item
= XCONS (tail
)->car
;
3520 if (XTYPE (item
) == Lisp_Cons
)
3522 key
= XCONS (item
)->car
;
3523 binding
= XCONS (item
)->cdr
;
3524 if (XTYPE (binding
) == Lisp_Cons
)
3526 item_string
= XCONS (binding
)->car
;
3527 if (XTYPE (item_string
) == Lisp_String
)
3528 result
= menu_bar_item (key
, item_string
,
3529 Fcdr (binding
), result
);
3531 else if (EQ (binding
, Qundefined
))
3532 result
= menu_bar_item (key
, item_string
,
3535 else if (XTYPE (item
) == Lisp_Vector
)
3537 /* Loop over the char values represented in the vector. */
3538 int len
= XVECTOR (item
)->size
;
3540 for (c
= 0; c
< len
; c
++)
3542 Lisp_Object character
;
3543 XFASTINT (character
) = c
;
3544 binding
= XVECTOR (item
)->contents
[c
];
3545 if (XTYPE (binding
) == Lisp_Cons
)
3547 item_string
= XCONS (binding
)->car
;
3548 if (XTYPE (item_string
) == Lisp_String
)
3549 result
= menu_bar_item (key
, item_string
,
3550 Fcdr (binding
), result
);
3552 else if (EQ (binding
, Qundefined
))
3553 result
= menu_bar_item (key
, item_string
,
3563 menu_bar_item (key
, item_string
, def
, result
)
3564 Lisp_Object key
, item_string
, def
, result
;
3567 Lisp_Object enabled
;
3569 if (EQ (def
, Qundefined
))
3571 /* If a map has an explicit nil as definition,
3572 discard any previously made menu bar item. */
3573 tem
= Fassq (key
, result
);
3574 return Fdelq (tem
, result
);
3577 /* See if this entry is enabled. */
3580 if (XTYPE (def
) == Lisp_Symbol
)
3582 /* No property, or nil, means enable.
3583 Otherwise, enable if value is not nil. */
3584 tem
= Fget (def
, Qmenu_enable
);
3586 enabled
= Feval (tem
);
3589 /* Add an entry for this key and string
3590 if there is none yet. */
3591 tem
= Fassq (key
, result
);
3592 if (!NILP (enabled
) && NILP (tem
))
3593 result
= Fcons (Fcons (key
, Fcons (item_string
, Qnil
)), result
);
3598 /* Read a character using menus based on maps in the array MAPS.
3599 NMAPS is the length of MAPS. Return nil if there are no menus in the maps.
3600 Return t if we displayed a menu but the user rejected it.
3602 PREV_EVENT is the previous input event, or nil if we are reading
3603 the first event of a key sequence.
3605 If USED_MOUSE_MENU is non-zero, then we set *USED_MOUSE_MENU to 1
3606 if we used a mouse menu to read the input, or zero otherwise. If
3607 USED_MOUSE_MENU is zero, *USED_MOUSE_MENU is left alone.
3609 The prompting is done based on the prompt-string of the map
3610 and the strings associated with various map elements.
3612 This can be done with X menus or with menus put in the minibuf.
3613 These are done in different ways, depending on how the input will be read.
3614 Menus using X are done after auto-saving in read-char, getting the input
3615 event from Fx_popup_menu; menus using the minibuf use read_char recursively
3616 and do auto-saving in the inner call of read_char. */
3619 read_char_x_menu_prompt (nmaps
, maps
, prev_event
, used_mouse_menu
)
3622 Lisp_Object prev_event
;
3623 int *used_mouse_menu
;
3626 register Lisp_Object name
;
3627 Lisp_Object rest
, vector
;
3629 if (used_mouse_menu
)
3630 *used_mouse_menu
= 0;
3632 /* Use local over global Menu maps */
3634 if (! menu_prompting
)
3637 /* Get the menu name from the first map that has one (a prompt string). */
3638 for (mapno
= 0; mapno
< nmaps
; mapno
++)
3640 name
= map_prompt (maps
[mapno
]);
3645 /* If we don't have any menus, just read a character normally. */
3649 #ifdef HAVE_X_WINDOWS
3651 /* If we got to this point via a mouse click,
3652 use a real menu for mouse selection. */
3653 if (EVENT_HAS_PARAMETERS (prev_event
))
3655 /* Display the menu and get the selection. */
3656 Lisp_Object
*realmaps
3657 = (Lisp_Object
*) alloca (nmaps
* sizeof (Lisp_Object
));
3661 /* Use the maps that are not nil. */
3662 for (mapno
= 0; mapno
< nmaps
; mapno
++)
3663 if (!NILP (maps
[mapno
]))
3664 realmaps
[nmaps1
++] = maps
[mapno
];
3666 value
= Fx_popup_menu (prev_event
, Flist (nmaps1
, realmaps
));
3669 /* If we got more than one event, put all but the first
3670 onto this list to be read later.
3671 Return just the first event now. */
3672 unread_command_events
3673 = nconc2 (XCONS (value
)->cdr
, unread_command_events
);
3674 value
= XCONS (value
)->car
;
3678 if (used_mouse_menu
)
3679 *used_mouse_menu
= 1;
3682 #endif /* HAVE_X_MENU */
3683 #endif /* HAVE_X_WINDOWS */
3688 read_char_minibuf_menu_prompt(commandflag
, nmaps
, maps
)
3694 register Lisp_Object name
;
3696 int width
= FRAME_WIDTH (selected_frame
) - 4;
3697 char *menu
= (char *) alloca (width
+ 4);
3700 Lisp_Object rest
, vector
;
3702 if (! menu_prompting
)
3705 /* Get the menu name from the first map that has one (a prompt string). */
3706 for (mapno
= 0; mapno
< nmaps
; mapno
++)
3708 name
= map_prompt (maps
[mapno
]);
3713 /* If we don't have any menus, just read a character normally. */
3717 /* Prompt string always starts with map's prompt, and a space. */
3718 strcpy (menu
, XSTRING (name
)->data
);
3719 nlength
= XSTRING (name
)->size
;
3720 menu
[nlength
++] = ':';
3721 menu
[nlength
++] = ' ';
3724 /* Start prompting at start of first map. */
3728 /* Present the documented bindings, a line at a time. */
3735 int orig_defn_macro
;
3737 /* Loop over elements of map. */
3742 /* If reached end of map, start at beginning of next map. */
3746 /* At end of last map, wrap around to first map if just starting,
3747 or end this line if already have something on it. */
3751 if ( notfirst
|| nobindings
) break;
3756 /* Look at the next element of the map. */
3758 elt
= XVECTOR (vector
)->contents
[idx
];
3760 elt
= Fcar_safe (rest
);
3762 if (idx
< 0 && XTYPE (elt
) == Lisp_Vector
)
3764 /* If we found a dense table in the keymap,
3765 advanced past it, but start scanning its contents. */
3766 rest
= Fcdr_safe (rest
);
3772 /* An ordinary element. */
3774 s
= Fcar_safe (Fcdr_safe (elt
)); /* alist */
3776 s
= Fcar_safe(elt
); /* vector */
3777 if (XTYPE (s
) != Lisp_String
)
3778 /* Ignore the element if it has no prompt string. */
3780 /* If we have room for the prompt string, add it to this line.
3781 If this is the first on the line, always add it. */
3782 else if (XSTRING (s
)->size
+ i
+ 2 < width
3787 /* Punctuate between strings. */
3790 strcpy (menu
+ i
, ", ");
3796 /* Add as much of string as fits. */
3797 thiswidth
= XSTRING (s
)->size
;
3798 if (thiswidth
+ i
> width
)
3799 thiswidth
= width
- i
;
3800 bcopy (XSTRING (s
)->data
, menu
+ i
, thiswidth
);
3806 /* If this element does not fit, end the line now,
3807 and save the element for the next line. */
3808 strcpy (menu
+ i
, "...");
3812 /* Move past this element. */
3813 if (idx
>= 0 && idx
+ 1 >= XVECTOR (vector
)->size
)
3814 /* Handle reaching end of dense table. */
3819 rest
= Fcdr_safe (rest
);
3823 /* Prompt with that and read response. */
3826 /* Make believe its not a keyboard macro in case the help char
3827 is pressed. Help characters are not recorded because menu prompting
3828 is not used on replay.
3830 orig_defn_macro
= defining_kbd_macro
;
3831 defining_kbd_macro
= 0 ;
3832 obj
= read_char (commandflag
, 0, 0, Qnil
, 0);
3833 defining_kbd_macro
= orig_defn_macro
;
3835 if (XTYPE (obj
) != Lisp_Int
)
3840 if (! EQ (obj
, menu_prompt_more_char
)
3841 && (XTYPE (menu_prompt_more_char
) != Lisp_Int
3842 || ! EQ (obj
, make_number (Ctl (XINT (menu_prompt_more_char
))))))
3844 if ( defining_kbd_macro
)
3845 store_kbd_macro_char(obj
) ;
3848 /* Help char - go round again */
3852 /* Reading key sequences. */
3854 /* Follow KEY in the maps in CURRENT[0..NMAPS-1], placing its bindings
3855 in DEFS[0..NMAPS-1]. Set NEXT[i] to DEFS[i] if DEFS[i] is a
3856 keymap, or nil otherwise. Return the index of the first keymap in
3857 which KEY has any binding, or NMAPS if no map has a binding.
3859 If KEY is a meta ASCII character, treat it like meta-prefix-char
3860 followed by the corresponding non-meta character. Keymaps in
3861 CURRENT with non-prefix bindings for meta-prefix-char become nil in
3864 When KEY is not defined in any of the keymaps, if it is an upper
3865 case letter and there are bindings for the corresponding lower-case
3866 letter, return the bindings for the lower-case letter.
3867 We store 1 in *CASE_CONVERTED in this case.
3868 Otherwise, we don't change *CASE_CONVERTED.
3870 If KEY has no bindings in any of the CURRENT maps, NEXT is left
3873 NEXT may == CURRENT. */
3876 follow_key (key
, nmaps
, current
, defs
, next
, case_converted
)
3878 Lisp_Object
*current
, *defs
, *next
;
3880 int *case_converted
;
3882 int i
, first_binding
;
3884 /* If KEY is a meta ASCII character, treat it like meta-prefix-char
3885 followed by the corresponding non-meta character. */
3886 if (XTYPE (key
) == Lisp_Int
&& (XINT (key
) & CHAR_META
))
3888 for (i
= 0; i
< nmaps
; i
++)
3889 if (! NILP (current
[i
]))
3892 get_keyelt (access_keymap (current
[i
], meta_prefix_char
, 1, 0));
3894 /* Note that since we pass the resulting bindings through
3895 get_keymap_1, non-prefix bindings for meta-prefix-char
3897 next
[i
] = get_keymap_1 (next
[i
], 0, 1);
3903 XSET (key
, Lisp_Int
, XFASTINT (key
) & ~CHAR_META
);
3906 first_binding
= nmaps
;
3907 for (i
= nmaps
- 1; i
>= 0; i
--)
3909 if (! NILP (current
[i
]))
3911 defs
[i
] = get_keyelt (access_keymap (current
[i
], key
, 1, 0));
3912 if (! NILP (defs
[i
]))
3919 /* When KEY is not defined in any of the keymaps, if it is an upper
3920 case letter and there are bindings for the corresponding
3921 lower-case letter, return the bindings for the lower-case letter. */
3922 if (first_binding
== nmaps
3923 && XTYPE (key
) == Lisp_Int
3924 && ((((XINT (key
) & 0x3ffff)
3925 < XSTRING (current_buffer
->downcase_table
)->size
)
3926 && UPPERCASEP (XINT (key
) & 0x3ffff))
3927 || (XINT (key
) & shift_modifier
)))
3929 if (XINT (key
) & shift_modifier
)
3930 XSETINT (key
, XINT (key
) & ~shift_modifier
);
3932 XSETINT (key
, (DOWNCASE (XINT (key
) & 0x3ffff)
3933 | (XINT (key
) & ~0x3ffff)));
3935 first_binding
= nmaps
;
3936 for (i
= nmaps
- 1; i
>= 0; i
--)
3938 if (! NILP (current
[i
]))
3940 defs
[i
] = get_keyelt (access_keymap (current
[i
], key
, 1, 0));
3941 if (! NILP (defs
[i
]))
3947 if (first_binding
!= nmaps
)
3948 *case_converted
= 1;
3951 /* Given the set of bindings we've found, produce the next set of maps. */
3952 if (first_binding
< nmaps
)
3953 for (i
= 0; i
< nmaps
; i
++)
3954 next
[i
] = NILP (defs
[i
]) ? Qnil
: get_keymap_1 (defs
[i
], 0, 1);
3956 return first_binding
;
3959 /* Read a sequence of keys that ends with a non prefix character,
3960 storing it in KEYBUF, a buffer of size BUFSIZE.
3962 Return the length of the key sequence stored.
3963 Return -1 if the user rejected a command menu.
3965 Echo starting immediately unless `prompt' is 0.
3967 Where a key sequence ends depends on the currently active keymaps.
3968 These include any minor mode keymaps active in the current buffer,
3969 the current buffer's local map, and the global map.
3971 If a key sequence has no other bindings, we check Vfunction_key_map
3972 to see if some trailing subsequence might be the beginning of a
3973 function key's sequence. If so, we try to read the whole function
3974 key, and substitute its symbolic name into the key sequence.
3976 We ignore unbound `down-' mouse clicks. We turn unbound `drag-' and
3977 `double-' events into similar click events, if that would make them
3978 bound. We try to turn `triple-' events first into `double-' events,
3981 If we get a mouse click in a mode line, vertical divider, or other
3982 non-text area, we treat the click as if it were prefixed by the
3983 symbol denoting that area - `mode-line', `vertical-line', or
3986 If the sequence starts with a mouse click, we read the key sequence
3987 with respect to the buffer clicked on, not the current buffer.
3989 If the user switches frames in the midst of a key sequence, we put
3990 off the switch-frame event until later; the next call to
3991 read_char will return it. */
3994 read_key_sequence (keybuf
, bufsize
, prompt
)
3995 Lisp_Object
*keybuf
;
3999 int count
= specpdl_ptr
- specpdl
;
4001 /* How many keys there are in the current key sequence. */
4004 /* The length of the echo buffer when we started reading, and
4005 the length of this_command_keys when we started reading. */
4009 /* The number of keymaps we're scanning right now, and the number of
4010 keymaps we have allocated space for. */
4012 int nmaps_allocated
= 0;
4014 /* defs[0..nmaps-1] are the definitions of KEYBUF[0..t-1] in
4015 the current keymaps. */
4018 /* submaps[0..nmaps-1] are the prefix definitions of KEYBUF[0..t-1]
4019 in the current keymaps, or nil where it is not a prefix. */
4020 Lisp_Object
*submaps
;
4022 /* The index in defs[] of the first keymap that has a binding for
4023 this key sequence. In other words, the lowest i such that
4024 defs[i] is non-nil. */
4027 /* If t < mock_input, then KEYBUF[t] should be read as the next
4030 We use this to recover after recognizing a function key. Once we
4031 realize that a suffix of the current key sequence is actually a
4032 function key's escape sequence, we replace the suffix with the
4033 function key's binding from Vfunction_key_map. Now keybuf
4034 contains a new and different key sequence, so the echo area,
4035 this_command_keys, and the submaps and defs arrays are wrong. In
4036 this situation, we set mock_input to t, set t to 0, and jump to
4037 restart_sequence; the loop will read keys from keybuf up until
4038 mock_input, thus rebuilding the state; and then it will resume
4039 reading characters from the keyboard. */
4042 /* If the sequence is unbound in submaps[], then
4043 keybuf[fkey_start..fkey_end-1] is a prefix in Vfunction_key_map,
4044 and fkey_map is its binding.
4046 These might be > t, indicating that all function key scanning
4047 should hold off until t reaches them. We do this when we've just
4048 recognized a function key, to avoid searching for the function
4049 key's again in Vfunction_key_map. */
4050 int fkey_start
= 0, fkey_end
= 0;
4051 Lisp_Object fkey_map
;
4053 /* Likewise, for key_translation_map. */
4054 int keytran_start
= 0, keytran_end
= 0;
4055 Lisp_Object keytran_map
;
4057 /* If we receive a ``switch-frame'' event in the middle of a key sequence,
4058 we put it off for later. While we're reading, we keep the event here. */
4059 Lisp_Object delayed_switch_frame
;
4061 /* See the comment below... */
4062 #if defined (GOBBLE_FIRST_EVENT)
4063 Lisp_Object first_event
;
4066 struct buffer
*starting_buffer
;
4068 /* Nonzero if we found the binding for one of the chars
4069 in this key sequence by downcasing it. */
4070 int case_converted
= 0;
4072 /* Nonzero if we seem to have got the beginning of a binding
4073 in function_key_map. */
4074 int function_key_possible
= 0;
4078 last_nonmenu_event
= Qnil
;
4080 delayed_switch_frame
= Qnil
;
4081 fkey_map
= Vfunction_key_map
;
4082 keytran_map
= Vkey_translation_map
;
4084 /* If there is no function-key-map, turn off function key scanning. */
4085 if (NILP (Fkeymapp (Vfunction_key_map
)))
4086 fkey_start
= fkey_end
= bufsize
+ 1;
4088 /* If there is no key-translation-map, turn off scanning. */
4089 if (NILP (Fkeymapp (Vkey_translation_map
)))
4090 keytran_start
= keytran_end
= bufsize
+ 1;
4095 echo_prompt (XSTRING (prompt
)->data
);
4096 else if (cursor_in_echo_area
)
4097 /* This doesn't put in a dash if the echo buffer is empty, so
4098 you don't always see a dash hanging out in the minibuffer. */
4102 /* Record the initial state of the echo area and this_command_keys;
4103 we will need to restore them if we replay a key sequence. */
4105 echo_start
= echo_length ();
4106 keys_start
= this_command_key_count
;
4108 #if defined (GOBBLE_FIRST_EVENT)
4109 /* This doesn't quite work, because some of the things that read_char
4110 does cannot safely be bypassed. It seems too risky to try to make
4113 /* Read the first char of the sequence specially, before setting
4114 up any keymaps, in case a filter runs and switches buffers on us. */
4115 first_event
= read_char (NILP (prompt
), 0, submaps
, last_nonmenu_event
,
4117 #endif /* GOBBLE_FIRST_EVENT */
4119 /* We jump here when the key sequence has been thoroughly changed, and
4120 we need to rescan it starting from the beginning. When we jump here,
4121 keybuf[0..mock_input] holds the sequence we should reread. */
4124 starting_buffer
= current_buffer
;
4126 function_key_possible
= 0;
4128 /* Build our list of keymaps.
4129 If we recognize a function key and replace its escape sequence in
4130 keybuf with its symbol, or if the sequence starts with a mouse
4131 click and we need to switch buffers, we jump back here to rebuild
4132 the initial keymaps from the current buffer. */
4136 nmaps
= current_minor_maps (0, &maps
) + 2;
4137 if (nmaps
> nmaps_allocated
)
4139 submaps
= (Lisp_Object
*) alloca (nmaps
* sizeof (submaps
[0]));
4140 defs
= (Lisp_Object
*) alloca (nmaps
* sizeof (defs
[0]));
4141 nmaps_allocated
= nmaps
;
4143 bcopy (maps
, submaps
, (nmaps
- 2) * sizeof (submaps
[0]));
4144 #ifdef USE_TEXT_PROPERTIES
4145 submaps
[nmaps
-2] = get_local_map (PT
, current_buffer
);
4147 submaps
[nmaps
-2] = current_buffer
->keymap
;
4149 submaps
[nmaps
-1] = current_global_map
;
4152 /* Find an accurate initial value for first_binding. */
4153 for (first_binding
= 0; first_binding
< nmaps
; first_binding
++)
4154 if (! NILP (submaps
[first_binding
]))
4157 /* Start from the beginning in keybuf. */
4160 /* These are no-ops the first time through, but if we restart, they
4161 revert the echo area and this_command_keys to their original state. */
4162 this_command_key_count
= keys_start
;
4164 echo_truncate (echo_start
);
4166 /* If the best binding for the current key sequence is a keymap, or
4167 we may be looking at a function key's escape sequence, keep on
4169 while ((first_binding
< nmaps
&& ! NILP (submaps
[first_binding
]))
4170 || (first_binding
>= nmaps
4172 /* mock input is never part of a function key's sequence. */
4173 && mock_input
<= fkey_start
)
4174 || (first_binding
>= nmaps
4175 && keytran_start
< t
4176 /* mock input is never part of a function key's sequence. */
4177 && mock_input
<= keytran_start
)
4178 /* Don't return in the middle of a possible function key sequence,
4179 if the only bindings we found were via case conversion.
4180 Thus, if ESC O a has a function-key-map translation
4181 and ESC o has a binding, don't return after ESC O,
4182 so that we can translate ESC O plus the next character. */
4183 || (function_key_possible
&& case_converted
))
4186 int used_mouse_menu
= 0;
4188 /* Where the last real key started. If we need to throw away a
4189 key that has expanded into more than one element of keybuf
4190 (say, a mouse click on the mode line which is being treated
4191 as [mode-line (mouse-...)], then we backtrack to this point
4193 int last_real_key_start
;
4195 /* These variables are analogous to echo_start and keys_start;
4196 while those allow us to restart the entire key sequence,
4197 echo_local_start and keys_local_start allow us to throw away
4199 int echo_local_start
, keys_local_start
, local_first_binding
;
4202 error ("key sequence too long");
4205 echo_local_start
= echo_length ();
4206 keys_local_start
= this_command_key_count
;
4207 local_first_binding
= first_binding
;
4210 /* These are no-ops, unless we throw away a keystroke below and
4211 jumped back up to replay_key; in that case, these restore the
4212 variables to their original state, allowing us to replay the
4215 echo_truncate (echo_local_start
);
4216 this_command_key_count
= keys_local_start
;
4217 first_binding
= local_first_binding
;
4219 /* By default, assume each event is "real". */
4220 last_real_key_start
= t
;
4222 /* Does mock_input indicate that we are re-reading a key sequence? */
4226 add_command_key (key
);
4230 /* If not, we should actually read a character. */
4233 struct buffer
*buf
= current_buffer
;
4235 key
= read_char (NILP (prompt
), nmaps
, submaps
, last_nonmenu_event
,
4238 /* read_char returns t when it shows a menu and the user rejects it.
4243 /* read_char returns -1 at the end of a macro.
4244 Emacs 18 handles this by returning immediately with a
4245 zero, so that's what we'll do. */
4246 if (XTYPE (key
) == Lisp_Int
&& XINT (key
) == -1)
4252 /* If we have a quit that was typed in another frame, and
4253 quit_throw_to_read_char switched buffers,
4254 replay to get the right keymap. */
4255 if (EQ (key
, quit_char
) && current_buffer
!= starting_buffer
)
4260 goto replay_sequence
;
4266 /* Clicks in non-text areas get prefixed by the symbol
4267 in their CHAR-ADDRESS field. For example, a click on
4268 the mode line is prefixed by the symbol `mode-line'.
4270 Furthermore, key sequences beginning with mouse clicks
4271 are read using the keymaps of the buffer clicked on, not
4272 the current buffer. So we may have to switch the buffer
4275 When we turn one event into two events, we must make sure
4276 that neither of the two looks like the original--so that,
4277 if we replay the events, they won't be expanded again.
4278 If not for this, such reexpansion could happen either here
4279 or when user programs play with this-command-keys. */
4280 if (EVENT_HAS_PARAMETERS (key
))
4282 Lisp_Object kind
= EVENT_HEAD_KIND (EVENT_HEAD (key
));
4284 if (EQ (kind
, Qmouse_click
))
4286 Lisp_Object window
= POSN_WINDOW (EVENT_START (key
));
4287 Lisp_Object posn
= POSN_BUFFER_POSN (EVENT_START (key
));
4289 if (XTYPE (posn
) == Lisp_Cons
)
4291 /* We're looking at the second event of a
4292 sequence which we expanded before. Set
4293 last_real_key_start appropriately. */
4295 last_real_key_start
= t
- 1;
4298 /* Key sequences beginning with mouse clicks are
4299 read using the keymaps in the buffer clicked on,
4300 not the current buffer. If we're at the
4301 beginning of a key sequence, switch buffers. */
4302 if (last_real_key_start
== 0
4303 && XTYPE (window
) == Lisp_Window
4304 && XTYPE (XWINDOW (window
)->buffer
) == Lisp_Buffer
4305 && XBUFFER (XWINDOW (window
)->buffer
) != current_buffer
)
4310 /* Arrange to go back to the original buffer once we're
4311 done reading the key sequence. Note that we can't
4312 use save_excursion_{save,restore} here, because they
4313 save point as well as the current buffer; we don't
4314 want to save point, because redisplay may change it,
4315 to accommodate a Fset_window_start or something. We
4316 don't want to do this at the top of the function,
4317 because we may get input from a subprocess which
4318 wants to change the selected window and stuff (say,
4320 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
4322 set_buffer_internal (XBUFFER (XWINDOW (window
)->buffer
));
4323 goto replay_sequence
;
4325 else if (XTYPE (posn
) == Lisp_Symbol
)
4327 /* Expand mode-line and scroll-bar events into two events:
4328 use posn as a fake prefix key. */
4330 if (t
+ 1 >= bufsize
)
4331 error ("key sequence too long");
4336 /* Zap the position in key, so we know that we've
4337 expanded it, and don't try to do so again. */
4338 POSN_BUFFER_POSN (EVENT_START (key
))
4339 = Fcons (posn
, Qnil
);
4343 else if (EQ (kind
, Qswitch_frame
))
4345 /* If we're at the beginning of a key sequence, go
4346 ahead and return this event. If we're in the
4347 midst of a key sequence, delay it until the end. */
4350 delayed_switch_frame
= key
;
4356 Lisp_Object posn
= POSN_BUFFER_POSN (EVENT_START (key
));
4358 /* Handle menu-bar events:
4359 insert the dummy prefix event `menu-bar'. */
4360 if (EQ (posn
, Qmenu_bar
))
4362 if (t
+ 1 >= bufsize
)
4363 error ("key sequence too long");
4364 /* Run the Lucid hook. */
4365 call1 (Vrun_hooks
, Qactivate_menubar_hook
);
4366 /* If it has changed current-menubar from previous value,
4367 really recompute the menubar from the value. */
4368 if (! NILP (Vlucid_menu_bar_dirty_flag
))
4369 call0 (Qrecompute_lucid_menubar
);
4373 /* Zap the position in key, so we know that we've
4374 expanded it, and don't try to do so again. */
4375 POSN_BUFFER_POSN (EVENT_START (key
))
4376 = Fcons (posn
, Qnil
);
4379 goto replay_sequence
;
4381 else if (XTYPE (posn
) == Lisp_Cons
)
4383 /* We're looking at the second event of a
4384 sequence which we expanded before. Set
4385 last_real_key_start appropriately. */
4386 if (last_real_key_start
== t
&& t
> 0)
4387 last_real_key_start
= t
- 1;
4392 /* We have finally decided that KEY is something we might want
4394 first_binding
= (follow_key (key
,
4395 nmaps
- first_binding
,
4396 submaps
+ first_binding
,
4397 defs
+ first_binding
,
4398 submaps
+ first_binding
,
4402 /* If KEY wasn't bound, we'll try some fallbacks. */
4403 if (first_binding
>= nmaps
)
4405 Lisp_Object head
= EVENT_HEAD (key
);
4407 if (EQ (head
, Vhelp_char
))
4409 read_key_sequence_cmd
= Vprefix_help_command
;
4411 last_nonmenu_event
= key
;
4415 if (XTYPE (head
) == Lisp_Symbol
)
4417 Lisp_Object breakdown
= parse_modifiers (head
);
4418 int modifiers
= XINT (XCONS (XCONS (breakdown
)->cdr
)->car
);
4420 /* Attempt to reduce an unbound mouse event to a simpler
4421 event that is bound:
4422 Drags reduce to clicks.
4423 Double-clicks reduce to clicks.
4424 Triple-clicks reduce to double-clicks, then to clicks.
4425 Down-clicks are eliminated.
4426 Double-downs reduce to downs, then are eliminated.
4427 Triple-downs reduce to double-downs, then to downs,
4428 then are eliminated. */
4429 if (modifiers
& (down_modifier
| drag_modifier
4430 | double_modifier
| triple_modifier
))
4432 while (modifiers
& (down_modifier
| drag_modifier
4433 | double_modifier
| triple_modifier
))
4435 Lisp_Object new_head
, new_click
;
4436 if (modifiers
& triple_modifier
)
4437 modifiers
^= (double_modifier
| triple_modifier
);
4438 else if (modifiers
& (drag_modifier
| double_modifier
))
4439 modifiers
&= ~(drag_modifier
| double_modifier
);
4442 /* Dispose of this `down' event by simply jumping
4443 back to replay_key, to get another event.
4445 Note that if this event came from mock input,
4446 then just jumping back to replay_key will just
4447 hand it to us again. So we have to wipe out any
4450 We could delete keybuf[t] and shift everything
4451 after that to the left by one spot, but we'd also
4452 have to fix up any variable that points into
4453 keybuf, and shifting isn't really necessary
4456 Adding prefixes for non-textual mouse clicks
4457 creates two characters of mock input, and both
4458 must be thrown away. If we're only looking at
4459 the prefix now, we can just jump back to
4460 replay_key. On the other hand, if we've already
4461 processed the prefix, and now the actual click
4462 itself is giving us trouble, then we've lost the
4463 state of the keymaps we want to backtrack to, and
4464 we need to replay the whole sequence to rebuild
4467 Beyond that, only function key expansion could
4468 create more than two keys, but that should never
4469 generate mouse events, so it's okay to zero
4470 mock_input in that case too.
4472 Isn't this just the most wonderful code ever? */
4473 if (t
== last_real_key_start
)
4480 mock_input
= last_real_key_start
;
4481 goto replay_sequence
;
4486 = apply_modifiers (modifiers
, XCONS (breakdown
)->car
);
4488 = Fcons (new_head
, Fcons (EVENT_START (key
), Qnil
));
4490 /* Look for a binding for this new key. follow_key
4491 promises that it didn't munge submaps the
4492 last time we called it, since key was unbound. */
4494 = (follow_key (new_click
,
4495 nmaps
- local_first_binding
,
4496 submaps
+ local_first_binding
,
4497 defs
+ local_first_binding
,
4498 submaps
+ local_first_binding
,
4500 + local_first_binding
);
4502 /* If that click is bound, go for it. */
4503 if (first_binding
< nmaps
)
4508 /* Otherwise, we'll leave key set to the drag event. */
4515 /* Normally, last_nonmenu_event gets the previous key we read.
4516 But when a mouse popup menu is being used,
4517 we don't update last_nonmenu_event; it continues to hold the mouse
4518 event that preceded the first level of menu. */
4519 if (!used_mouse_menu
)
4520 last_nonmenu_event
= key
;
4522 /* If the sequence is unbound, see if we can hang a function key
4523 off the end of it. We only want to scan real keyboard input
4524 for function key sequences, so if mock_input says that we're
4525 re-reading old events, don't examine it. */
4526 if ((first_binding
>= nmaps
|| case_converted
)
4529 Lisp_Object fkey_next
;
4531 /* Continue scan from fkey_end until we find a bound suffix.
4532 If we fail, increment fkey_start
4533 and start fkey_end from there. */
4534 while (fkey_end
< t
)
4538 key
= keybuf
[fkey_end
++];
4539 /* Look up meta-characters by prefixing them
4540 with meta_prefix_char. I hate this. */
4541 if (XTYPE (key
) == Lisp_Int
&& XINT (key
) & meta_modifier
)
4546 (access_keymap (fkey_map
, meta_prefix_char
, 1, 0)),
4548 XFASTINT (key
) = XFASTINT (key
) & ~meta_modifier
;
4551 fkey_next
= fkey_map
;
4554 = get_keyelt (access_keymap (fkey_next
, key
, 1, 0));
4556 /* If the function key map gives a function, not an
4557 array, then call the function with no args and use
4558 its value instead. */
4559 if (SYMBOLP (fkey_next
) && ! NILP (Ffboundp (fkey_next
))
4562 struct gcpro gcpro1
, gcpro2
, gcpro3
;
4566 GCPRO3 (fkey_map
, keytran_map
, delayed_switch_frame
);
4567 fkey_next
= call1 (fkey_next
, prompt
);
4569 /* If the function returned something invalid,
4570 barf--don't ignore it.
4571 (To ignore it safely, we would need to gcpro a bunch of
4572 other variables.) */
4573 if (! (VECTORP (fkey_next
) || STRINGP (fkey_next
)))
4574 error ("Function in function-key-map returns invalid key sequence");
4577 function_key_possible
= ! NILP (fkey_next
);
4579 /* If keybuf[fkey_start..fkey_end] is bound in the
4580 function key map and it's a suffix of the current
4581 sequence (i.e. fkey_end == t), replace it with
4582 the binding and restart with fkey_start at the end. */
4583 if ((VECTORP (fkey_next
) || STRINGP (fkey_next
))
4586 int len
= XFASTINT (Flength (fkey_next
));
4588 t
= fkey_start
+ len
;
4590 error ("key sequence too long");
4592 if (VECTORP (fkey_next
))
4593 bcopy (XVECTOR (fkey_next
)->contents
,
4594 keybuf
+ fkey_start
,
4595 (t
- fkey_start
) * sizeof (keybuf
[0]));
4596 else if (STRINGP (fkey_next
))
4600 for (i
= 0; i
< len
; i
++)
4601 XFASTINT (keybuf
[fkey_start
+ i
])
4602 = XSTRING (fkey_next
)->data
[i
];
4606 fkey_start
= fkey_end
= t
;
4607 fkey_map
= Vfunction_key_map
;
4609 goto replay_sequence
;
4612 fkey_map
= get_keymap_1 (fkey_next
, 0, 1);
4614 /* If we no longer have a bound suffix, try a new positions for
4616 if (NILP (fkey_map
))
4618 fkey_end
= ++fkey_start
;
4619 fkey_map
= Vfunction_key_map
;
4620 function_key_possible
= 0;
4625 /* Look for this sequence in key-translation-map. */
4627 Lisp_Object keytran_next
;
4629 /* Scan from keytran_end until we find a bound suffix. */
4630 while (keytran_end
< t
)
4634 key
= keybuf
[keytran_end
++];
4635 /* Look up meta-characters by prefixing them
4636 with meta_prefix_char. I hate this. */
4637 if (XTYPE (key
) == Lisp_Int
&& XINT (key
) & meta_modifier
)
4642 (access_keymap (keytran_map
, meta_prefix_char
, 1, 0)),
4644 XFASTINT (key
) = XFASTINT (key
) & ~meta_modifier
;
4647 keytran_next
= keytran_map
;
4650 = get_keyelt (access_keymap (keytran_next
, key
, 1, 0));
4652 /* If the key translation map gives a function, not an
4653 array, then call the function with no args and use
4654 its value instead. */
4655 if (SYMBOLP (keytran_next
) && ! NILP (Ffboundp (keytran_next
))
4656 && keytran_end
== t
)
4658 struct gcpro gcpro1
, gcpro2
, gcpro3
;
4662 GCPRO3 (keytran_map
, keytran_map
, delayed_switch_frame
);
4663 keytran_next
= call1 (keytran_next
, prompt
);
4665 /* If the function returned something invalid,
4666 barf--don't ignore it.
4667 (To ignore it safely, we would need to gcpro a bunch of
4668 other variables.) */
4669 if (! (VECTORP (keytran_next
) || STRINGP (keytran_next
)))
4670 error ("Function in function-key-map returns invalid key sequence");
4673 /* If keybuf[keytran_start..keytran_end] is bound in the
4674 key translation map and it's a suffix of the current
4675 sequence (i.e. keytran_end == t), replace it with
4676 the binding and restart with keytran_start at the end. */
4677 if ((VECTORP (keytran_next
) || STRINGP (keytran_next
))
4678 && keytran_end
== t
)
4680 int len
= XFASTINT (Flength (keytran_next
));
4682 t
= keytran_start
+ len
;
4684 error ("key sequence too long");
4686 if (VECTORP (keytran_next
))
4687 bcopy (XVECTOR (keytran_next
)->contents
,
4688 keybuf
+ keytran_start
,
4689 (t
- keytran_start
) * sizeof (keybuf
[0]));
4690 else if (STRINGP (keytran_next
))
4694 for (i
= 0; i
< len
; i
++)
4695 XFASTINT (keybuf
[keytran_start
+ i
])
4696 = XSTRING (keytran_next
)->data
[i
];
4700 keytran_start
= keytran_end
= t
;
4701 keytran_map
= Vkey_translation_map
;
4703 goto replay_sequence
;
4706 keytran_map
= get_keymap_1 (keytran_next
, 0, 1);
4708 /* If we no longer have a bound suffix, try a new positions for
4710 if (NILP (keytran_map
))
4712 keytran_end
= ++keytran_start
;
4713 keytran_map
= Vkey_translation_map
;
4719 read_key_sequence_cmd
= (first_binding
< nmaps
4720 ? defs
[first_binding
]
4724 unread_switch_frame
= delayed_switch_frame
;
4725 unbind_to (count
, Qnil
);
4727 /* Occasionally we fabricate events, perhaps by expanding something
4728 according to function-key-map, or by adding a prefix symbol to a
4729 mouse click in the scroll bar or modeline. In this cases, return
4730 the entire generated key sequence, even if we hit an unbound
4731 prefix or a definition before the end. This means that you will
4732 be able to push back the event properly, and also means that
4733 read-key-sequence will always return a logical unit.
4736 for (; t
< mock_input
; t
++)
4738 echo_char (keybuf
[t
]);
4739 add_command_key (keybuf
[t
]);
4745 #if 0 /* This doc string is too long for some compilers.
4746 This commented-out definition serves for DOC. */
4747 DEFUN ("read-key-sequence", Fread_key_sequence
, Sread_key_sequence
, 1, 2, 0,
4748 "Read a sequence of keystrokes and return as a string or vector.\n\
4749 The sequence is sufficient to specify a non-prefix command in the\n\
4750 current local and global maps.\n\
4752 First arg PROMPT is a prompt string. If nil, do not prompt specially.\n\
4753 Second (optional) arg CONTINUE-ECHO, if non-nil, means this key echos\n\
4754 as a continuation of the previous key.\n\
4756 A C-g typed while in this function is treated like any other character,\n\
4757 and `quit-flag' is not set.\n\
4759 If the key sequence starts with a mouse click, then the sequence is read\n\
4760 using the keymaps of the buffer of the window clicked in, not the buffer\n\
4761 of the selected window as normal.\n\
4763 `read-key-sequence' drops unbound button-down events, since you normally\n\
4764 only care about the click or drag events which follow them. If a drag\n\
4765 or multi-click event is unbound, but the corresponding click event would\n\
4766 be bound, `read-key-sequence' turns the event into a click event at the\n\
4767 drag's starting position. This means that you don't have to distinguish\n\
4768 between click and drag, double, or triple events unless you want to.\n\
4770 `read-key-sequence' prefixes mouse events on mode lines, the vertical\n\
4771 lines separating windows, and scroll bars with imaginary keys\n\
4772 `mode-line', `vertical-line', and `vertical-scroll-bar'.\n\
4774 If the user switches frames in the middle of a key sequence, the\n\
4775 frame-switch event is put off until after the current key sequence.\n\
4777 `read-key-sequence' checks `function-key-map' for function key\n\
4778 sequences, where they wouldn't conflict with ordinary bindings. See\n\
4779 `function-key-map' for more details.")
4780 (prompt
, continue_echo
)
4783 DEFUN ("read-key-sequence", Fread_key_sequence
, Sread_key_sequence
, 1, 2, 0,
4785 (prompt
, continue_echo
)
4786 Lisp_Object prompt
, continue_echo
;
4788 Lisp_Object keybuf
[30];
4790 struct gcpro gcpro1
, gcpro2
;
4793 CHECK_STRING (prompt
, 0);
4796 bzero (keybuf
, sizeof keybuf
);
4798 gcpro1
.nvars
= (sizeof keybuf
/sizeof (keybuf
[0]));
4800 if (NILP (continue_echo
))
4801 this_command_key_count
= 0;
4803 i
= read_key_sequence (keybuf
, (sizeof keybuf
/sizeof (keybuf
[0])), prompt
);
4811 return make_event_array (i
, keybuf
);
4814 DEFUN ("command-execute", Fcommand_execute
, Scommand_execute
, 1, 2, 0,
4815 "Execute CMD as an editor command.\n\
4816 CMD must be a symbol that satisfies the `commandp' predicate.\n\
4817 Optional second arg RECORD-FLAG non-nil\n\
4818 means unconditionally put this command in `command-history'.\n\
4819 Otherwise, that is done only if an arg is read using the minibuffer.")
4821 Lisp_Object cmd
, record
;
4823 register Lisp_Object final
;
4824 register Lisp_Object tem
;
4825 Lisp_Object prefixarg
;
4826 struct backtrace backtrace
;
4827 extern int debug_on_next_call
;
4829 prefixarg
= Vprefix_arg
, Vprefix_arg
= Qnil
;
4830 Vcurrent_prefix_arg
= prefixarg
;
4831 debug_on_next_call
= 0;
4833 if (XTYPE (cmd
) == Lisp_Symbol
)
4835 tem
= Fget (cmd
, Qdisabled
);
4837 return call1 (Vrun_hooks
, Qdisabled_command_hook
);
4842 final
= Findirect_function (cmd
);
4844 if (CONSP (final
) && (tem
= Fcar (final
), EQ (tem
, Qautoload
)))
4845 do_autoload (final
, cmd
);
4850 if (XTYPE (final
) == Lisp_String
4851 || XTYPE (final
) == Lisp_Vector
)
4853 /* If requested, place the macro in the command history. For
4854 other sorts of commands, call-interactively takes care of
4858 = Fcons (Fcons (Qexecute_kbd_macro
,
4859 Fcons (final
, Fcons (prefixarg
, Qnil
))),
4862 return Fexecute_kbd_macro (final
, prefixarg
);
4864 if (CONSP (final
) || XTYPE (final
) == Lisp_Subr
4865 || XTYPE (final
) == Lisp_Compiled
)
4867 backtrace
.next
= backtrace_list
;
4868 backtrace_list
= &backtrace
;
4869 backtrace
.function
= &Qcall_interactively
;
4870 backtrace
.args
= &cmd
;
4871 backtrace
.nargs
= 1;
4872 backtrace
.evalargs
= 0;
4874 tem
= Fcall_interactively (cmd
, record
);
4876 backtrace_list
= backtrace
.next
;
4882 DEFUN ("execute-extended-command", Fexecute_extended_command
, Sexecute_extended_command
,
4884 "Read function name, then read its arguments and call it.")
4886 Lisp_Object prefixarg
;
4888 Lisp_Object function
;
4890 Lisp_Object saved_keys
;
4891 struct gcpro gcpro1
;
4893 saved_keys
= Fthis_command_keys ();
4895 GCPRO1 (saved_keys
);
4897 if (EQ (prefixarg
, Qminus
))
4899 else if (CONSP (prefixarg
) && XINT (XCONS (prefixarg
)->car
) == 4)
4900 strcpy (buf
, "C-u ");
4901 else if (CONSP (prefixarg
) && XTYPE (XCONS (prefixarg
)->car
) == Lisp_Int
)
4902 sprintf (buf
, "%d ", XINT (XCONS (prefixarg
)->car
));
4903 else if (XTYPE (prefixarg
) == Lisp_Int
)
4904 sprintf (buf
, "%d ", XINT (prefixarg
));
4906 /* This isn't strictly correct if execute-extended-command
4907 is bound to anything else. Perhaps it should use
4908 this_command_keys? */
4909 strcat (buf
, "M-x ");
4911 /* Prompt with buf, and then read a string, completing from and
4912 restricting to the set of all defined commands. Don't provide
4913 any initial input. Save the command read on the extended-command
4915 function
= Fcompleting_read (build_string (buf
),
4916 Vobarray
, Qcommandp
,
4917 Qt
, Qnil
, Qextended_command_history
);
4919 /* Set this_command_keys to the concatenation of saved_keys and
4920 function, followed by a RET. */
4922 struct Lisp_String
*str
;
4926 this_command_key_count
= 0;
4928 str
= XSTRING (saved_keys
);
4929 for (i
= 0; i
< str
->size
; i
++)
4931 XFASTINT (tem
) = str
->data
[i
];
4932 add_command_key (tem
);
4935 str
= XSTRING (function
);
4936 for (i
= 0; i
< str
->size
; i
++)
4938 XFASTINT (tem
) = str
->data
[i
];
4939 add_command_key (tem
);
4942 XFASTINT (tem
) = '\015';
4943 add_command_key (tem
);
4948 function
= Fintern (function
, Qnil
);
4949 Vprefix_arg
= prefixarg
;
4950 this_command
= function
;
4952 return Fcommand_execute (function
, Qt
);
4956 detect_input_pending ()
4959 get_input_pending (&input_pending
);
4961 return input_pending
;
4964 /* This is called in some cases before a possible quit.
4965 It cases the next call to detect_input_pending to recompute input_pending.
4966 So calling this function unnecessarily can't do any harm. */
4967 clear_input_pending ()
4972 DEFUN ("input-pending-p", Finput_pending_p
, Sinput_pending_p
, 0, 0, 0,
4973 "T if command input is currently available with no waiting.\n\
4974 Actually, the value is nil only if we can be sure that no input is available.")
4977 if (!NILP (unread_command_events
) || unread_command_char
!= -1)
4980 return detect_input_pending () ? Qt
: Qnil
;
4983 DEFUN ("recent-keys", Frecent_keys
, Srecent_keys
, 0, 0, 0,
4984 "Return vector of last 100 events, not counting those from keyboard macros.")
4987 Lisp_Object
*keys
= XVECTOR (recent_keys
)->contents
;
4990 if (total_keys
< NUM_RECENT_KEYS
)
4991 return Fvector (total_keys
, keys
);
4994 val
= Fvector (NUM_RECENT_KEYS
, keys
);
4995 bcopy (keys
+ recent_keys_index
,
4996 XVECTOR (val
)->contents
,
4997 (NUM_RECENT_KEYS
- recent_keys_index
) * sizeof (Lisp_Object
));
4999 XVECTOR (val
)->contents
+ NUM_RECENT_KEYS
- recent_keys_index
,
5000 recent_keys_index
* sizeof (Lisp_Object
));
5005 DEFUN ("this-command-keys", Fthis_command_keys
, Sthis_command_keys
, 0, 0, 0,
5006 "Return the key sequence that invoked this command.\n\
5007 The value is a string or a vector.")
5010 return make_event_array (this_command_key_count
,
5011 XVECTOR (this_command_keys
)->contents
);
5014 DEFUN ("recursion-depth", Frecursion_depth
, Srecursion_depth
, 0, 0, 0,
5015 "Return the current depth in recursive edits.")
5019 XFASTINT (temp
) = command_loop_level
+ minibuf_level
;
5023 DEFUN ("open-dribble-file", Fopen_dribble_file
, Sopen_dribble_file
, 1, 1,
5024 "FOpen dribble file: ",
5025 "Start writing all keyboard characters to a dribble file called FILE.\n\
5026 If FILE is nil, close any open dribble file.")
5037 file
= Fexpand_file_name (file
, Qnil
);
5038 dribble
= fopen (XSTRING (file
)->data
, "w");
5043 DEFUN ("discard-input", Fdiscard_input
, Sdiscard_input
, 0, 0, 0,
5044 "Discard the contents of the terminal input buffer.\n\
5045 Also cancel any kbd macro being defined.")
5048 defining_kbd_macro
= 0;
5049 update_mode_lines
++;
5051 unread_command_events
= Qnil
;
5052 unread_command_char
= -1;
5054 discard_tty_input ();
5056 /* Without the cast, GCC complains that this assignment loses the
5057 volatile qualifier of kbd_store_ptr. Is there anything wrong
5059 kbd_fetch_ptr
= (struct input_event
*) kbd_store_ptr
;
5060 Ffillarray (kbd_buffer_frame_or_window
, Qnil
);
5066 DEFUN ("suspend-emacs", Fsuspend_emacs
, Ssuspend_emacs
, 0, 1, "",
5067 "Stop Emacs and return to superior process. You can resume later.\n\
5068 On systems that don't have job control, run a subshell instead.\n\n\
5069 If optional arg STUFFSTRING is non-nil, its characters are stuffed\n\
5070 to be read as terminal input by Emacs's parent, after suspension.\n\
5072 Before suspending, call the functions in `suspend-hook' with no args.\n\
5073 If any of them returns nil, don't call the rest and don't suspend.\n\
5074 Otherwise, suspend normally and after resumption run the normal hook\n\
5075 `suspend-resume-hook' if that is bound and non-nil.\n\
5077 Some operating systems cannot stop the Emacs process and resume it later.\n\
5078 On such systems, Emacs starts a subshell instead of suspending.")
5080 Lisp_Object stuffstring
;
5083 int count
= specpdl_ptr
- specpdl
;
5084 int old_height
, old_width
;
5086 struct gcpro gcpro1
, gcpro2
;
5087 extern init_sys_modes ();
5089 if (!NILP (stuffstring
))
5090 CHECK_STRING (stuffstring
, 0);
5092 /* Run the functions in suspend-hook. */
5093 if (!NILP (Vrun_hooks
))
5094 call1 (Vrun_hooks
, intern ("suspend-hook"));
5096 GCPRO1 (stuffstring
);
5097 get_frame_size (&old_width
, &old_height
);
5099 /* sys_suspend can get an error if it tries to fork a subshell
5100 and the system resources aren't available for that. */
5101 record_unwind_protect (init_sys_modes
, 0);
5102 stuff_buffered_input (stuffstring
);
5104 unbind_to (count
, Qnil
);
5106 /* Check if terminal/window size has changed.
5107 Note that this is not useful when we are running directly
5108 with a window system; but suspend should be disabled in that case. */
5109 get_frame_size (&width
, &height
);
5110 if (width
!= old_width
|| height
!= old_height
)
5111 change_frame_size (selected_frame
, height
, width
, 0, 0);
5113 /* Run suspend-resume-hook. */
5114 if (!NILP (Vrun_hooks
))
5115 call1 (Vrun_hooks
, intern ("suspend-resume-hook"));
5121 /* If STUFFSTRING is a string, stuff its contents as pending terminal input.
5122 Then in any case stuff anything Emacs has read ahead and not used. */
5124 stuff_buffered_input (stuffstring
)
5125 Lisp_Object stuffstring
;
5127 register unsigned char *p
;
5129 /* stuff_char works only in BSD, versions 4.2 and up. */
5132 if (XTYPE (stuffstring
) == Lisp_String
)
5136 p
= XSTRING (stuffstring
)->data
;
5137 count
= XSTRING (stuffstring
)->size
;
5142 /* Anything we have read ahead, put back for the shell to read. */
5143 while (kbd_fetch_ptr
!= kbd_store_ptr
)
5145 if (kbd_fetch_ptr
== kbd_buffer
+ KBD_BUFFER_SIZE
)
5146 kbd_fetch_ptr
= kbd_buffer
;
5147 if (kbd_fetch_ptr
->kind
== ascii_keystroke
)
5148 stuff_char (kbd_fetch_ptr
->code
);
5149 kbd_fetch_ptr
->kind
= no_event
;
5150 (XVECTOR (kbd_buffer_frame_or_window
)->contents
[kbd_fetch_ptr
5157 #endif /* BSD and not BSD4_1 */
5160 set_waiting_for_input (time_to_clear
)
5161 EMACS_TIME
*time_to_clear
;
5163 input_available_clear_time
= time_to_clear
;
5165 /* Tell interrupt_signal to throw back to read_char, */
5166 waiting_for_input
= 1;
5168 /* If interrupt_signal was called before and buffered a C-g,
5169 make it run again now, to avoid timing error. */
5170 if (!NILP (Vquit_flag
))
5171 quit_throw_to_read_char ();
5174 clear_waiting_for_input ()
5176 /* Tell interrupt_signal not to throw back to read_char, */
5177 waiting_for_input
= 0;
5178 input_available_clear_time
= 0;
5181 /* This routine is called at interrupt level in response to C-G.
5182 If interrupt_input, this is the handler for SIGINT.
5183 Otherwise, it is called from kbd_buffer_store_event,
5184 in handling SIGIO or SIGTINT.
5186 If `waiting_for_input' is non zero, then unless `echoing' is nonzero,
5187 immediately throw back to read_char.
5189 Otherwise it sets the Lisp variable quit-flag not-nil.
5190 This causes eval to throw, when it gets a chance.
5191 If quit-flag is already non-nil, it stops the job right away. */
5197 /* Must preserve main program's value of errno. */
5198 int old_errno
= errno
;
5201 /* USG systems forget handlers when they are used;
5202 must reestablish each time */
5203 signal (SIGINT
, interrupt_signal
);
5204 signal (SIGQUIT
, interrupt_signal
);
5209 if (!NILP (Vquit_flag
) && FRAME_TERMCAP_P (selected_frame
))
5214 #ifdef SIGTSTP /* Support possible in later USG versions */
5216 * On systems which can suspend the current process and return to the original
5217 * shell, this command causes the user to end up back at the shell.
5218 * The "Auto-save" and "Abort" questions are not asked until
5219 * the user elects to return to emacs, at which point he can save the current
5220 * job and either dump core or continue.
5225 if (sys_suspend () == -1)
5227 printf ("Not running as a subprocess;\n");
5228 printf ("you can continue or abort.\n");
5231 /* Perhaps should really fork an inferior shell?
5232 But that would not provide any way to get back
5233 to the original shell, ever. */
5234 printf ("No support for stopping a process on this operating system;\n");
5235 printf ("you can continue or abort.\n");
5236 #endif /* not VMS */
5237 #endif /* not SIGTSTP */
5239 /* We must remain inside the screen area when the internal terminal
5240 is used. Note that [Enter] is not echoed by dos. */
5243 printf ("Auto-save? (y or n) ");
5245 if (((c
= getchar ()) & ~040) == 'Y')
5247 Fdo_auto_save (Qt
, Qnil
);
5249 printf ("\r\nAuto-save done");
5250 #else /* not MSDOS */
5251 printf ("Auto-save done\n");
5252 #endif /* not MSDOS */
5254 while (c
!= '\n') c
= getchar ();
5256 printf ("\r\nAbort? (y or n) ");
5257 #else /* not MSDOS */
5259 printf ("Abort (and enter debugger)? (y or n) ");
5261 printf ("Abort (and dump core)? (y or n) ");
5262 #endif /* not VMS */
5263 #endif /* not MSDOS */
5265 if (((c
= getchar ()) & ~040) == 'Y')
5267 while (c
!= '\n') c
= getchar ();
5269 printf ("\r\nContinuing...\r\n");
5270 #else /* not MSDOS */
5271 printf ("Continuing...\n");
5272 #endif /* not MSDOS */
5278 /* If executing a function that wants to be interrupted out of
5279 and the user has not deferred quitting by binding `inhibit-quit'
5280 then quit right away. */
5281 if (immediate_quit
&& NILP (Vinhibit_quit
))
5285 Fsignal (Qquit
, Qnil
);
5288 /* Else request quit when it's safe */
5292 if (waiting_for_input
&& !echoing
)
5293 quit_throw_to_read_char ();
5298 /* Handle a C-g by making read_char return C-g. */
5300 quit_throw_to_read_char ()
5302 quit_error_check ();
5304 /* Prevent another signal from doing this before we finish. */
5305 clear_waiting_for_input ();
5308 unread_command_events
= Qnil
;
5309 unread_command_char
= -1;
5311 #ifdef POLL_FOR_INPUT
5312 /* May be > 1 if in recursive minibuffer. */
5313 if (poll_suppress_count
== 0)
5317 if (XTYPE (internal_last_event_frame
) == Lisp_Frame
5318 && XFRAME (internal_last_event_frame
) != selected_frame
)
5319 Fhandle_switch_frame (make_lispy_switch_frame (internal_last_event_frame
));
5322 _longjmp (getcjmp
, 1);
5325 DEFUN ("set-input-mode", Fset_input_mode
, Sset_input_mode
, 3, 4, 0,
5326 "Set mode of reading keyboard input.\n\
5327 First arg INTERRUPT non-nil means use input interrupts;\n\
5328 nil means use CBREAK mode.\n\
5329 Second arg FLOW non-nil means use ^S/^Q flow control for output to terminal\n\
5330 (no effect except in CBREAK mode).\n\
5331 Third arg META t means accept 8-bit input (for a Meta key).\n\
5332 META nil means ignore the top bit, on the assumption it is parity.\n\
5333 Otherwise, accept 8-bit input and don't use the top bit for Meta.\n\
5334 Optional fourth arg QUIT if non-nil specifies character to use for quitting.\n\
5335 See also `current-input-mode'.")
5336 (interrupt
, flow
, meta
, quit
)
5337 Lisp_Object interrupt
, flow
, meta
, quit
;
5340 && (XTYPE (quit
) != Lisp_Int
5341 || XINT (quit
) < 0 || XINT (quit
) > 0400))
5342 error ("set-input-mode: QUIT must be an ASCII character");
5344 #ifdef POLL_FOR_INPUT
5350 /* Note SIGIO has been undef'd if FIONREAD is missing. */
5351 #ifdef NO_SOCK_SIGIO
5352 if (read_socket_hook
)
5353 interrupt_input
= 0; /* No interrupts if reading from a socket. */
5355 #endif /* NO_SOCK_SIGIO */
5356 interrupt_input
= !NILP (interrupt
);
5357 #else /* not SIGIO */
5358 interrupt_input
= 0;
5359 #endif /* not SIGIO */
5360 /* Our VMS input only works by interrupts, as of now. */
5362 interrupt_input
= 1;
5364 flow_control
= !NILP (flow
);
5367 else if (EQ (meta
, Qt
))
5372 /* Don't let this value be out of range. */
5373 quit_char
= XINT (quit
) & (meta_key
? 0377 : 0177);
5377 #ifdef POLL_FOR_INPUT
5378 poll_suppress_count
= 1;
5384 DEFUN ("current-input-mode", Fcurrent_input_mode
, Scurrent_input_mode
, 0, 0, 0,
5385 "Return information about the way Emacs currently reads keyboard input.\n\
5386 The value is a list of the form (INTERRUPT FLOW META QUIT), where\n\
5387 INTERRUPT is non-nil if Emacs is using interrupt-driven input; if\n\
5388 nil, Emacs is using CBREAK mode.\n\
5389 FLOW is non-nil if Emacs uses ^S/^Q flow control for output to the\n\
5390 terminal; this does not apply if Emacs uses interrupt-driven input.\n\
5391 META is t if accepting 8-bit input with 8th bit as Meta flag.\n\
5392 META nil means ignoring the top bit, on the assumption it is parity.\n\
5393 META is neither t nor nil if accepting 8-bit input and using\n\
5394 all 8 bits as the character code.\n\
5395 QUIT is the character Emacs currently uses to quit.\n\
5396 The elements of this list correspond to the arguments of\n\
5402 val
[0] = interrupt_input
? Qt
: Qnil
;
5403 val
[1] = flow_control
? Qt
: Qnil
;
5404 val
[2] = meta_key
== 2 ? make_number (0) : meta_key
== 1 ? Qt
: Qnil
;
5405 XFASTINT (val
[3]) = quit_char
;
5407 return Flist (sizeof (val
) / sizeof (val
[0]), val
);
5413 /* This is correct before outermost invocation of the editor loop */
5414 command_loop_level
= -1;
5416 quit_char
= Ctl ('g');
5417 unread_command_events
= Qnil
;
5418 unread_command_char
= -1;
5420 recent_keys_index
= 0;
5421 kbd_fetch_ptr
= kbd_buffer
;
5422 kbd_store_ptr
= kbd_buffer
;
5423 do_mouse_tracking
= 0;
5427 /* This means that command_loop_1 won't try to select anything the first
5429 internal_last_event_frame
= Qnil
;
5430 Vlast_event_frame
= internal_last_event_frame
;
5433 /* If we're running a dumped Emacs, we need to clear out
5434 kbd_buffer_frame_or_window, in case some events got into it
5437 If we're running an undumped Emacs, it hasn't been initialized by
5438 syms_of_keyboard yet. */
5440 Ffillarray (kbd_buffer_frame_or_window
, Qnil
);
5442 if (!noninteractive
)
5444 signal (SIGINT
, interrupt_signal
);
5445 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
5446 /* For systems with SysV TERMIO, C-g is set up for both SIGINT and
5447 SIGQUIT and we can't tell which one it will give us. */
5448 signal (SIGQUIT
, interrupt_signal
);
5449 #endif /* HAVE_TERMIO */
5450 /* Note SIGIO has been undef'd if FIONREAD is missing. */
5452 signal (SIGIO
, input_available_signal
);
5456 /* Use interrupt input by default, if it works and noninterrupt input
5457 has deficiencies. */
5459 #ifdef INTERRUPT_INPUT
5460 interrupt_input
= 1;
5462 interrupt_input
= 0;
5465 /* Our VMS input only works by interrupts, as of now. */
5467 interrupt_input
= 1;
5473 if (keyboard_init_hook
)
5474 (*keyboard_init_hook
) ();
5476 #ifdef POLL_FOR_INPUT
5477 poll_suppress_count
= 1;
5482 /* This type's only use is in syms_of_keyboard, to initialize the
5483 event header symbols and put properties on them. */
5490 struct event_head head_table
[] = {
5491 &Qmouse_movement
, "mouse-movement", &Qmouse_movement
,
5492 &Qscroll_bar_movement
, "scroll-bar-movement", &Qmouse_movement
,
5493 &Qswitch_frame
, "switch-frame", &Qswitch_frame
,
5498 Qdisabled_command_hook
= intern ("disabled-command-hook");
5499 staticpro (&Qdisabled_command_hook
);
5501 Qself_insert_command
= intern ("self-insert-command");
5502 staticpro (&Qself_insert_command
);
5504 Qforward_char
= intern ("forward-char");
5505 staticpro (&Qforward_char
);
5507 Qbackward_char
= intern ("backward-char");
5508 staticpro (&Qbackward_char
);
5510 Qdisabled
= intern ("disabled");
5511 staticpro (&Qdisabled
);
5513 Qundefined
= intern ("undefined");
5514 staticpro (&Qundefined
);
5516 Qpre_command_hook
= intern ("pre-command-hook");
5517 staticpro (&Qpre_command_hook
);
5519 Qpost_command_hook
= intern ("post-command-hook");
5520 staticpro (&Qpost_command_hook
);
5522 Qfunction_key
= intern ("function-key");
5523 staticpro (&Qfunction_key
);
5524 Qmouse_click
= intern ("mouse-click");
5525 staticpro (&Qmouse_click
);
5527 Qmenu_enable
= intern ("menu-enable");
5528 staticpro (&Qmenu_enable
);
5530 Qmode_line
= intern ("mode-line");
5531 staticpro (&Qmode_line
);
5532 Qvertical_line
= intern ("vertical-line");
5533 staticpro (&Qvertical_line
);
5534 Qvertical_scroll_bar
= intern ("vertical-scroll-bar");
5535 staticpro (&Qvertical_scroll_bar
);
5536 Qmenu_bar
= intern ("menu-bar");
5537 staticpro (&Qmenu_bar
);
5539 Qabove_handle
= intern ("above-handle");
5540 staticpro (&Qabove_handle
);
5541 Qhandle
= intern ("handle");
5542 staticpro (&Qhandle
);
5543 Qbelow_handle
= intern ("below-handle");
5544 staticpro (&Qbelow_handle
);
5546 Qevent_kind
= intern ("event-kind");
5547 staticpro (&Qevent_kind
);
5548 Qevent_symbol_elements
= intern ("event-symbol-elements");
5549 staticpro (&Qevent_symbol_elements
);
5550 Qevent_symbol_element_mask
= intern ("event-symbol-element-mask");
5551 staticpro (&Qevent_symbol_element_mask
);
5552 Qmodifier_cache
= intern ("modifier-cache");
5553 staticpro (&Qmodifier_cache
);
5555 Qrecompute_lucid_menubar
= intern ("recompute-lucid-menubar");
5556 staticpro (&Qrecompute_lucid_menubar
);
5557 Qactivate_menubar_hook
= intern ("activate-menubar-hook");
5558 staticpro (&Qactivate_menubar_hook
);
5561 struct event_head
*p
;
5563 for (p
= head_table
;
5564 p
< head_table
+ (sizeof (head_table
) / sizeof (head_table
[0]));
5567 *p
->var
= intern (p
->name
);
5569 Fput (*p
->var
, Qevent_kind
, *p
->kind
);
5570 Fput (*p
->var
, Qevent_symbol_elements
, Fcons (*p
->var
, Qnil
));
5574 button_down_location
= Fmake_vector (make_number (NUM_MOUSE_BUTTONS
), Qnil
);
5575 staticpro (&button_down_location
);
5579 int len
= sizeof (modifier_names
) / sizeof (modifier_names
[0]);
5581 modifier_symbols
= Fmake_vector (make_number (len
), Qnil
);
5582 for (i
= 0; i
< len
; i
++)
5583 if (modifier_names
[i
])
5584 XVECTOR (modifier_symbols
)->contents
[i
] = intern (modifier_names
[i
]);
5585 staticpro (&modifier_symbols
);
5588 recent_keys
= Fmake_vector (make_number (NUM_RECENT_KEYS
), Qnil
);
5589 staticpro (&recent_keys
);
5591 this_command_keys
= Fmake_vector (make_number (40), Qnil
);
5592 staticpro (&this_command_keys
);
5594 Qextended_command_history
= intern ("extended-command-history");
5595 Fset (Qextended_command_history
, Qnil
);
5596 staticpro (&Qextended_command_history
);
5598 kbd_buffer_frame_or_window
5599 = Fmake_vector (make_number (KBD_BUFFER_SIZE
), Qnil
);
5600 staticpro (&kbd_buffer_frame_or_window
);
5602 func_key_syms
= Qnil
;
5603 staticpro (&func_key_syms
);
5606 staticpro (&mouse_syms
);
5608 unread_switch_frame
= Qnil
;
5609 staticpro (&unread_switch_frame
);
5611 defsubr (&Sread_key_sequence
);
5612 defsubr (&Srecursive_edit
);
5613 defsubr (&Strack_mouse
);
5614 defsubr (&Sinput_pending_p
);
5615 defsubr (&Scommand_execute
);
5616 defsubr (&Srecent_keys
);
5617 defsubr (&Sthis_command_keys
);
5618 defsubr (&Ssuspend_emacs
);
5619 defsubr (&Sabort_recursive_edit
);
5620 defsubr (&Sexit_recursive_edit
);
5621 defsubr (&Srecursion_depth
);
5622 defsubr (&Stop_level
);
5623 defsubr (&Sdiscard_input
);
5624 defsubr (&Sopen_dribble_file
);
5625 defsubr (&Sset_input_mode
);
5626 defsubr (&Scurrent_input_mode
);
5627 defsubr (&Sexecute_extended_command
);
5629 DEFVAR_LISP ("last-command-char", &last_command_char
,
5630 "Last input event that was part of a command.");
5632 DEFVAR_LISP ("last-command-event", &last_command_char
,
5633 "Last input event that was part of a command.");
5635 DEFVAR_LISP ("last-nonmenu-event", &last_nonmenu_event
,
5636 "Last input event in a command, except for mouse menu events.\n\
5637 Mouse menus give back keys that don't look like mouse events;\n\
5638 this variable holds the actual mouse event that led to the menu,\n\
5639 so that you can determine whether the command was run by mouse or not.");
5641 DEFVAR_LISP ("last-input-char", &last_input_char
,
5642 "Last input event.");
5644 DEFVAR_LISP ("last-input-event", &last_input_char
,
5645 "Last input event.");
5647 DEFVAR_LISP ("unread-command-events", &unread_command_events
,
5648 "List of objects to be read as next command input events.");
5650 DEFVAR_INT ("unread-command-char", &unread_command_char
,
5651 "If not -1, an object to be read as next command input event.");
5653 DEFVAR_LISP ("meta-prefix-char", &meta_prefix_char
,
5654 "Meta-prefix character code. Meta-foo as command input\n\
5655 turns into this character followed by foo.");
5656 XSET (meta_prefix_char
, Lisp_Int
, 033);
5658 DEFVAR_LISP ("last-command", &last_command
,
5659 "The last command executed. Normally a symbol with a function definition,\n\
5660 but can be whatever was found in the keymap, or whatever the variable\n\
5661 `this-command' was set to by that command.");
5662 last_command
= Qnil
;
5664 DEFVAR_LISP ("this-command", &this_command
,
5665 "The command now being executed.\n\
5666 The command can set this variable; whatever is put here\n\
5667 will be in `last-command' during the following command.");
5668 this_command
= Qnil
;
5670 DEFVAR_INT ("auto-save-interval", &auto_save_interval
,
5671 "*Number of keyboard input characters between auto-saves.\n\
5672 Zero means disable autosaving due to number of characters typed.");
5673 auto_save_interval
= 300;
5675 DEFVAR_LISP ("auto-save-timeout", &Vauto_save_timeout
,
5676 "*Number of seconds idle time before auto-save.\n\
5677 Zero or nil means disable auto-saving due to idleness.\n\
5678 After auto-saving due to this many seconds of idle time,\n\
5679 Emacs also does a garbage collection if that seems to be warranted.");
5680 XFASTINT (Vauto_save_timeout
) = 30;
5682 DEFVAR_INT ("echo-keystrokes", &echo_keystrokes
,
5683 "*Nonzero means echo unfinished commands after this many seconds of pause.");
5684 echo_keystrokes
= 1;
5686 DEFVAR_INT ("polling-period", &polling_period
,
5687 "*Interval between polling for input during Lisp execution.\n\
5688 The reason for polling is to make C-g work to stop a running program.\n\
5689 Polling is needed only when using X windows and SIGIO does not work.\n\
5690 Polling is automatically disabled in all other cases.");
5693 DEFVAR_LISP ("double-click-time", &Vdouble_click_time
,
5694 "*Maximum time between mouse clicks to make a double-click.\n\
5695 Measured in milliseconds. nil means disable double-click recognition;\n\
5696 t means double-clicks have no time limit and are detected\n\
5697 by position only.");
5698 Vdouble_click_time
= make_number (500);
5700 DEFVAR_INT ("num-input-keys", &num_input_keys
,
5701 "*Number of complete keys read from the keyboard so far.");
5705 DEFVAR_LISP ("last-event-frame", &Vlast_event_frame
,
5706 "*The frame in which the most recently read event occurred.\n\
5707 If the last event came from a keyboard macro, this is set to `macro'.");
5708 Vlast_event_frame
= Qnil
;
5711 DEFVAR_LISP ("help-char", &Vhelp_char
,
5712 "Character to recognize as meaning Help.\n\
5713 When it is read, do `(eval help-form)', and display result if it's a string.\n\
5714 If the value of `help-form' is nil, this char can be read normally.");
5715 XSET (Vhelp_char
, Lisp_Int
, Ctl ('H'));
5717 DEFVAR_LISP ("help-form", &Vhelp_form
,
5718 "Form to execute when character `help-char' is read.\n\
5719 If the form returns a string, that string is displayed.\n\
5720 If `help-form' is nil, the help char is not recognized.");
5723 DEFVAR_LISP ("prefix-help-command", &Vprefix_help_command
,
5724 "Command to run when `help-char' character follows a prefix key.\n\
5725 This command is used only when there is no actual binding\n\
5726 for that character after that prefix key.");
5727 Vprefix_help_command
= Qnil
;
5729 DEFVAR_LISP ("top-level", &Vtop_level
,
5730 "Form to evaluate when Emacs starts up.\n\
5731 Useful to set before you dump a modified Emacs.");
5734 DEFVAR_LISP ("keyboard-translate-table", &Vkeyboard_translate_table
,
5735 "String used as translate table for keyboard input, or nil.\n\
5736 Each character is looked up in this string and the contents used instead.\n\
5737 If string is of length N, character codes N and up are untranslated.");
5738 Vkeyboard_translate_table
= Qnil
;
5740 DEFVAR_LISP ("key-translation-map", &Vkey_translation_map
,
5741 "Keymap of key translations that can override keymaps.\n\
5742 This keymap works like `function-key-map', but comes after that,\n\
5743 and applies even for keys that have ordinary bindings.");
5744 Vkey_translation_map
= Qnil
;
5746 DEFVAR_BOOL ("menu-prompting", &menu_prompting
,
5747 "Non-nil means prompt with menus when appropriate.\n\
5748 This is done when reading from a keymap that has a prompt string,\n\
5749 for elements that have prompt strings.\n\
5750 The menu is displayed on the screen\n\
5751 if X menus were enabled at configuration\n\
5752 time and the previous event was a mouse click prefix key.\n\
5753 Otherwise, menu prompting uses the echo area.");
5756 DEFVAR_LISP ("menu-prompt-more-char", &menu_prompt_more_char
,
5757 "Character to see next line of menu prompt.\n\
5758 Type this character while in a menu prompt to rotate around the lines of it.");
5759 XSET (menu_prompt_more_char
, Lisp_Int
, ' ');
5761 DEFVAR_INT ("extra-keyboard-modifiers", &extra_keyboard_modifiers
,
5762 "A mask of additional modifier keys to use with every keyboard character.\n\
5763 Emacs applies the modifiers of the character stored here to each keyboard\n\
5764 character it reads. For example, after evaluating the expression\n\
5765 (setq extra-keyboard-modifiers ?\C-x)\n\
5766 all input characters will have the control modifier applied to them.\n\
5768 Note that the character ?\C-@, equivalent to the integer zero, does\n\
5769 not count as a control character; rather, it counts as a character\n\
5770 with no modifiers; thus, setting `extra-keyboard-modifiers' to zero\n\
5771 cancels any modification.");
5772 extra_keyboard_modifiers
= 0;
5774 DEFVAR_LISP ("deactivate-mark", &Vdeactivate_mark
,
5775 "If an editing command sets this to t, deactivate the mark afterward.\n\
5776 The command loop sets this to nil before each command,\n\
5777 and tests the value when the command returns.\n\
5778 Buffer modification stores t in this variable.");
5779 Vdeactivate_mark
= Qnil
;
5781 DEFVAR_LISP ("pre-command-hook", &Vpre_command_hook
,
5782 "Normal hook run before each command is executed.");
5783 Vpre_command_hook
= Qnil
;
5785 DEFVAR_LISP ("post-command-hook", &Vpost_command_hook
,
5786 "Normal hook run after each command is executed.");
5787 Vpost_command_hook
= Qnil
;
5789 DEFVAR_LISP ("lucid-menu-bar-dirty-flag", &Vlucid_menu_bar_dirty_flag
,
5790 "t means menu bar, specified Lucid style, needs to be recomputed.");
5791 Vlucid_menu_bar_dirty_flag
= Qnil
;
5793 DEFVAR_LISP ("menu-bar-final-items", &Vmenu_bar_final_items
,
5794 "List of menu bar items to move to the end of the menu bar.\n\
5795 The elements of the list are event types that may have menu bar bindings.");
5796 Vmenu_bar_final_items
= Qnil
;
5798 DEFVAR_BOOL ("track-mouse", &do_mouse_tracking
,
5799 "*Non-nil means generate motion events for mouse motion.");
5801 DEFVAR_LISP ("vendor-key-alist", &Vvendor_key_alist
,
5802 "Alist of vendor-specific X windows key symbols.\n\
5803 Each element should have the form (N . SYMBOL) where N is the\n\
5804 numeric keysym code (sans the \"vendor-specific\" bit 1<<28)\n\
5805 and SYMBOL is its name.");
5806 Vmenu_bar_final_items
= Qnil
;
5811 initial_define_key (global_map
, Ctl ('Z'), "suspend-emacs");
5812 initial_define_key (control_x_map
, Ctl ('Z'), "suspend-emacs");
5813 initial_define_key (meta_map
, Ctl ('C'), "exit-recursive-edit");
5814 initial_define_key (global_map
, Ctl (']'), "abort-recursive-edit");
5815 initial_define_key (meta_map
, 'x', "execute-extended-command");