| 1 | /* Declarations useful when processing input. |
| 2 | Copyright (C) 1985, 1986, 1987, 1993 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 suppressed. */ |
| 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 | #ifdef MULTI_FRAME |
| 41 | /* The frame in which the last input event occurred, or Qmacro if the |
| 42 | last event came from a macro. We use this to determine when to |
| 43 | generate switch-frame events. This may be cleared by functions |
| 44 | like Fselect_frame, to make sure that a switch-frame event is |
| 45 | generated by the next character. */ |
| 46 | extern Lisp_Object internal_last_event_frame; |
| 47 | #endif |
| 48 | |
| 49 | \f |
| 50 | /* Macros for dealing with lispy events. */ |
| 51 | |
| 52 | /* True iff EVENT has data fields describing it (i.e. a mouse click). */ |
| 53 | #define EVENT_HAS_PARAMETERS(event) \ |
| 54 | (XTYPE (event) == Lisp_Cons) |
| 55 | |
| 56 | /* Extract the head from an event. |
| 57 | This works on composite and simple events. */ |
| 58 | #define EVENT_HEAD(event) \ |
| 59 | (EVENT_HAS_PARAMETERS (event) ? XCONS (event)->car : (event)) |
| 60 | |
| 61 | /* Extract the starting and ending positions from a composite event. */ |
| 62 | #define EVENT_START(event) (XCONS (XCONS (event)->cdr)->car) |
| 63 | #define EVENT_END(event) (XCONS (XCONS (XCONS (event)->cdr)->cdr)->car) |
| 64 | |
| 65 | /* Extract the click count from a multi-click event. */ |
| 66 | #define EVENT_CLICK_COUNT(event) (Fnth ((event), make_number (2))) |
| 67 | |
| 68 | /* Extract the fields of a position. */ |
| 69 | #define POSN_WINDOW(posn) (XCONS (posn)->car) |
| 70 | #define POSN_BUFFER_POSN(posn) (XCONS (XCONS (posn)->cdr)->car) |
| 71 | #define POSN_WINDOW_POSN(posn) (XCONS (XCONS (XCONS (posn)->cdr)->cdr)->car) |
| 72 | #define POSN_TIMESTAMP(posn) \ |
| 73 | (XCONS (XCONS (XCONS (XCONS (posn)->cdr)->cdr)->cdr)->car) |
| 74 | #define POSN_SCROLLBAR_PART(posn) (Fnth ((posn), make_number (4))) |
| 75 | |
| 76 | /* Some of the event heads. */ |
| 77 | extern Lisp_Object Qswitch_frame; |
| 78 | |
| 79 | /* Properties on event heads. */ |
| 80 | extern Lisp_Object Qevent_kind, Qevent_symbol_elements; |
| 81 | |
| 82 | /* Getting an unmodified version of an event head. */ |
| 83 | #define EVENT_HEAD_UNMODIFIED(event_head) \ |
| 84 | (Fcar (Fget ((event_head), Qevent_symbol_elements))) |
| 85 | |
| 86 | /* The values of Qevent_kind properties. */ |
| 87 | extern Lisp_Object Qfunction_key, Qmouse_click, Qmouse_movement; |
| 88 | extern Lisp_Object Qscroll_bar_movement; |
| 89 | |
| 90 | /* Getting the kind of an event head. */ |
| 91 | #define EVENT_HEAD_KIND(event_head) \ |
| 92 | (Fget ((event_head), Qevent_kind)) |
| 93 | |
| 94 | /* Symbols to use for non-text mouse positions. */ |
| 95 | extern Lisp_Object Qmode_line, Qvertical_line; |
| 96 | |
| 97 | extern Lisp_Object get_keymap_1 (); |
| 98 | extern Lisp_Object Fkeymapp (); |
| 99 | extern Lisp_Object reorder_modifiers (); |
| 100 | extern Lisp_Object read_char (); |
| 101 | /* User-supplied string to translate input characters through. */ |
| 102 | extern Lisp_Object Vkeyboard_translate_table; |
| 103 | |