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/* Declarations useful when processing input.
Copyright (C) 1985, 1986, 1987, 1993 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Total number of times read_char has returned. */
extern int num_input_chars;
/* Total number of times read_char has returned, outside of macros. */
extern int num_nonmacro_input_chars;
/* Nonzero means polling for input is temporarily suppressed. */
extern int poll_suppress_count;
/* Nonzero if polling_for_input is actually being used. */
extern int polling_for_input;
/* Keymap mapping ASCII function key sequences onto their preferred forms.
Initialized by the terminal-specific lisp files. */
extern Lisp_Object Vfunction_key_map;
/* Vector holding the key sequence that invoked the current command.
It is reused for each command, and it may be longer than the current
sequence; this_command_key_count indicates how many elements
actually mean something. */
extern Lisp_Object this_command_keys;
extern int this_command_key_count;
/* The frame in which the last input event occurred, or Qmacro if the
last event came from a macro. We use this to determine when to
generate switch-frame events. This may be cleared by functions
like Fselect_frame, to make sure that a switch-frame event is
generated by the next character. */
extern Lisp_Object internal_last_event_frame;
/* Macros for dealing with lispy events. */
/* True iff EVENT has data fields describing it (i.e. a mouse click). */
#define EVENT_HAS_PARAMETERS(event) (CONSP (event))
/* Extract the head from an event.
This works on composite and simple events. */
#define EVENT_HEAD(event) \
(EVENT_HAS_PARAMETERS (event) ? XCONS (event)->car : (event))
/* Extract the starting and ending positions from a composite event. */
#define EVENT_START(event) (XCONS (XCONS (event)->cdr)->car)
#define EVENT_END(event) (XCONS (XCONS (XCONS (event)->cdr)->cdr)->car)
/* Extract the click count from a multi-click event. */
#define EVENT_CLICK_COUNT(event) (Fnth ((event), make_number (2)))
/* Extract the fields of a position. */
#define POSN_WINDOW(posn) (XCONS (posn)->car)
#define POSN_BUFFER_POSN(posn) (XCONS (XCONS (posn)->cdr)->car)
#define POSN_WINDOW_POSN(posn) (XCONS (XCONS (XCONS (posn)->cdr)->cdr)->car)
#define POSN_TIMESTAMP(posn) \
(XCONS (XCONS (XCONS (XCONS (posn)->cdr)->cdr)->cdr)->car)
#define POSN_SCROLLBAR_PART(posn) (Fnth ((posn), make_number (4)))
/* Some of the event heads. */
extern Lisp_Object Qswitch_frame;
/* Properties on event heads. */
extern Lisp_Object Qevent_kind, Qevent_symbol_elements;
/* Getting an unmodified version of an event head. */
#define EVENT_HEAD_UNMODIFIED(event_head) \
(Fcar (Fget ((event_head), Qevent_symbol_elements)))
/* The values of Qevent_kind properties. */
extern Lisp_Object Qfunction_key, Qmouse_click, Qmouse_movement;
extern Lisp_Object Qscroll_bar_movement;
/* Getting the kind of an event head. */
#define EVENT_HEAD_KIND(event_head) \
(Fget ((event_head), Qevent_kind))
/* Symbols to use for non-text mouse positions. */
extern Lisp_Object Qmode_line, Qvertical_line;
extern Lisp_Object get_keymap_1 ();
extern Lisp_Object Fkeymapp ();
extern Lisp_Object reorder_modifiers ();
extern Lisp_Object read_char ();
/* User-supplied string to translate input characters through. */
extern Lisp_Object Vkeyboard_translate_table;
extern Lisp_Object map_prompt ();
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