code.delx.au - gnu-emacs/blob - src/keyboard.h

   1 /* Declarations useful when processing input.
   2    Copyright (C) 1985, 1986, 1987, 1992 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /* Total number of times read_char has returned.  */
  21 extern int num_input_chars;
  22
  23 /* Total number of times read_char has returned, outside of macros.  */
  24 extern int num_nonmacro_input_chars;
  25
  26 /* Nonzero means polling for input is temporarily suppresed.  */
  27 extern int poll_suppress_count;
  28
  29 /* Keymap mapping ASCII function key sequences onto their preferred forms.
  30    Initialized by the terminal-specific lisp files.  */
  31 extern Lisp_Object Vfunction_key_map;
  32
  33 /* Vector holding the key sequence that invoked the current command.
  34    It is reused for each command, and it may be longer than the current
  35    sequence; this_command_key_count indicates how many elements
  36    actually mean something.  */
  37 extern Lisp_Object this_command_keys;
  38 extern int this_command_key_count;
  39
  40 \f
  41 /* Macros for dealing with lispy events.  */
  42
  43 /* True iff EVENT has data fields describing it (i.e. a mouse click).  */
  44 #define EVENT_HAS_PARAMETERS(event) \
  45   (XTYPE (event) == Lisp_Cons)
  46
  47 /* Extract the head from an event.
  48    This works on composite and simple events.  */
  49 #define EVENT_HEAD(event) \
  50   (EVENT_HAS_PARAMETERS (event) ? XCONS (event)->car : (event))
  51
  52 /* Extract the starting and ending positions from a composite event.  */
  53 #define EVENT_START(event) (XCONS (XCONS (event)->cdr)->car)
  54 #define EVENT_END(event) (XCONS (XCONS (XCONS (event)->cdr)->cdr)->car)
  55
  56 /* Extract the fields of a position.  */
  57 #define POSN_WINDOW(posn) (XCONS (posn)->car)
  58 #define POSN_BUFFER_POSN(posn) (XCONS (XCONS (posn)->cdr)->car)
  59 #define POSN_SCROLLBAR_BUTTON POSN_BUFFER_POSN
  60 #define POSN_WINDOW_POSN(posn) (XCONS (XCONS (XCONS (posn)->cdr)->cdr)->car)
  61 #define POSN_TIMESTAMP(posn) \
  62   (XCONS (XCONS (XCONS (XCONS (posn)->cdr)->cdr)->cdr)->car)
  63
  64 /* Some of the event heads.  */
  65 extern Lisp_Object Qvscrollbar_part, Qvslider_part;
  66 extern Lisp_Object Qvthumbup_part, Qvthumbdown_part;
  67 extern Lisp_Object Qhscrollbar_part, Qhslider_part;
  68 extern Lisp_Object Qhthumbleft_part, Qhthumbright_part;
  69 extern Lisp_Object Qswitch_frame;
  70
  71 /* Properties on event heads.  */
  72 extern Lisp_Object Qevent_kind, Qevent_symbol_elements;
  73
  74 /* Getting an unmodified version of an event head.  */
  75 #define EVENT_HEAD_UNMODIFIED(event_head) \
  76   (Fcar (Fget ((event_head), Qevent_symbol_elements)))
  77
  78 /* The values of Qevent_kind properties.  */
  79 extern Lisp_Object Qfunction_key, Qmouse_click, Qmouse_movement;
  80 extern Lisp_Object Qscrollbar_click;
  81
  82 /* Getting the kind of an event head.  */
  83 #define EVENT_HEAD_KIND(event_head) \
  84   (Fget ((event_head), Qevent_kind))
  85
  86 /* Symbols to use for non-text mouse positions.  */
  87 extern Lisp_Object Qmode_line, Qvertical_line;
  88
  89 extern Lisp_Object get_keymap_1 ();
  90 extern Lisp_Object Fkeymapp ();
  91 extern Lisp_Object reorder_modifiers ();
  92 extern Lisp_Object Fmouse_click_p ();
  93 extern Lisp_Object read_char ();
  94 /* User-supplied string to translate input characters through.  */
  95 extern Lisp_Object Vkeyboard_translate_table;
  96