contrib/texinfo/info/infomap.h

   1 /* infomap.h -- description of a keymap in Info and related functions.
   2    $Id: infomap.h,v 1.6 2007/07/01 21:20:30 karl Exp $
   3
   4    Copyright (C) 1993, 2001, 2004, 2007 Free Software Foundation, Inc.
   5
   6    This program 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 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
  18
  19    Written by Brian Fox (bfox@ai.mit.edu). */
  20
  21 #ifndef INFOMAP_H
  22 #define INFOMAP_H
  23
  24 #include "info.h"
  25
  26 #define ESC '\033'
  27 #define DEL '\177'
  28 #define TAB '\011'
  29 #define RET '\r'
  30 #define LFD '\n'
  31 #define SPC ' '
  32
  33 #define meta_character_threshold (DEL + 1)
  34 #define control_character_threshold (SPC)
  35
  36 #define meta_character_bit 0x80
  37 #define control_character_bit 0x40
  38
  39 #define Meta_p(c) (((c) > meta_character_threshold))
  40 #define Control_p(c) ((c) < control_character_threshold)
  41
  42 #define Meta(c) ((c) | (meta_character_bit))
  43 #define UnMeta(c) ((c) & (~meta_character_bit))
  44 #define Control(c) ((toupper (c)) & (~control_character_bit))
  45 #define UnControl(c) (tolower ((c) | control_character_bit))
  46
  47 /* A keymap contains one entry for each key in the ASCII set.
  48    Each entry consists of a type and a pointer.
  49    FUNCTION is the address of a function to run, or the
  50    address of a keymap to indirect through.
  51    TYPE says which kind of thing FUNCTION is. */
  52 typedef struct keymap_entry
  53 {
  54   char type;
  55   InfoCommand *function;
  56 } KEYMAP_ENTRY;
  57
  58 typedef KEYMAP_ENTRY *Keymap;
  59
  60 /* The values that TYPE can have in a keymap entry. */
  61 #define ISFUNC 0
  62 #define ISKMAP 1
  63
  64 extern Keymap info_keymap;
  65 extern Keymap echo_area_keymap;
  66
  67 /* Return a new keymap which has all the uppercase letters mapped to run
  68    the function info_do_lowercase_version (). */
  69 extern Keymap keymap_make_keymap (void);
  70
  71 /* Return a new keymap which is a copy of MAP. */
  72 extern Keymap keymap_copy_keymap (Keymap map, Keymap rootmap,
  73     Keymap newroot);
  74
  75 /* Free MAP and it's descendents. */
  76 extern void keymap_discard_keymap (Keymap map, Keymap rootmap);
  77
  78 /* Initialize the info keymaps. */
  79 extern void initialize_info_keymaps (void);
  80
  81 #endif /* not INFOMAP_H */