texinfo/info/infomap.h

   1 /* infomap.h -- Description of a keymap in Info and related functions. */
   2
   3 /* This file is part of GNU Info, a program for reading online documentation
   4    stored in Info format.
   5
   6    Copyright (C) 1993 Free Software Foundation, Inc.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2, or (at your option)
  11    any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  21
  22    Written by Brian Fox (bfox@ai.mit.edu). */
  23
  24 #ifndef INFOMAP_H
  25 #define INFOMAP_H
  26
  27 #include "info.h"
  28
  29 #define ESC '\033'
  30 #define DEL '\177'
  31 #define TAB '\011'
  32 #define RET '\r'
  33 #define LFD '\n'
  34 #define SPC ' '
  35
  36 #define meta_character_threshold (DEL + 1)
  37 #define control_character_threshold (SPC)
  38
  39 #define meta_character_bit 0x80
  40 #define control_character_bit 0x40
  41
  42 #define Meta_p(c) (((c) > meta_character_threshold))
  43 #define Control_p(c) ((c) < control_character_threshold)
  44
  45 #define Meta(c) ((c) | (meta_character_bit))
  46 #define UnMeta(c) ((c) & (~meta_character_bit))
  47 #define Control(c) ((toupper (c)) & (~control_character_bit))
  48 #define UnControl(c) (tolower ((c) | control_character_bit))
  49
  50 /* A keymap contains one entry for each key in the ASCII set.
  51    Each entry consists of a type and a pointer.
  52    FUNCTION is the address of a function to run, or the
  53    address of a keymap to indirect through.
  54    TYPE says which kind of thing FUNCTION is. */
  55 typedef struct {
  56   char type;
  57   VFunction *function;
  58 } KEYMAP_ENTRY;
  59
  60 typedef KEYMAP_ENTRY *Keymap;
  61
  62 /* The values that TYPE can have in a keymap entry. */
  63 #define ISFUNC 0
  64 #define ISKMAP 1
  65
  66 extern Keymap info_keymap;
  67 extern Keymap echo_area_keymap;
  68
  69 /* Return a new keymap which has all the uppercase letters mapped to run
  70    the function info_do_lowercase_version (). */
  71 extern Keymap keymap_make_keymap ();
  72
  73 /* Return a new keymap which is a copy of MAP. */
  74 extern Keymap keymap_copy_keymap ();
  75
  76 /* Free MAP and it's descendents. */
  77 extern void keymap_discard_keymap ();
  78
  79 /* Initialize the info keymaps. */
  80 extern void initialize_info_keymaps ();
  81
  82 #endif /* not INFOMAP_H */