src/kbmap.h

   1 // -*- C++ -*-
   2 /* ======================================================================= *\
   3    File   : kbmap.h, kbmap.h,v 1.3 1996/12/10 04:35:57 larsbj Exp
   4    Author : chb, 30.Oct.1995
   5    Docu   : see kbmap.C
   6    Purpose: class definitions for XKeyEvent keymap handling
   7    \* ==================================================================== */
   8
   9 #ifndef KBMAP_H
  10 #define KBMAP_H
  11
  12 #ifdef __GNUG__
  13 #pragma interface
  14 #endif
  15
  16 #include <X11/Xlib.h>
  17
  18 #include "LString.h"
  19
  20 #define KB_PREALLOC  16
  21 #define KB_HASHSIZE 128   // yes, yes - I know. 128 is not exactly prime :-)
  22 // ... but we are dealing with ASCII chars mostly.
  23
  24 class kb_keymap;
  25 class kb_sequence;
  26
  27 ///
  28 struct kb_key {
  29         /// Keysym
  30         unsigned int code;
  31
  32         /// Modifier masks
  33         unsigned int mod;
  34
  35         /// Keymap for prefix keys
  36         kb_keymap *table;
  37
  38         /// Action for !prefix keys
  39         int action;
  40 };
  41
  42
  43 /// Defines key maps and actions for key sequences
  44 class kb_keymap {
  45 public:
  46         ///
  47         kb_keymap() {
  48                 size = 0;
  49                 table = 0;
  50         }
  51         ///
  52         ~kb_keymap();
  53
  54         /// Bind a key-sequence to an action
  55         /** Returns 0 on success. Otherwise, position in string where
  56           error occured. */
  57         int bind(char const* seq, int action);
  58
  59         ///
  60         int print(char* buf, int maxlen) const;
  61
  62         /// Look up a key in the keymap
  63         int lookup(KeySym key, unsigned mod, kb_sequence *seq);
  64
  65         /// Given an action, find all keybindings.
  66         string findbinding(int action) const;
  67 private:
  68         /// Define a new key sequence
  69         int defkey(kb_sequence *seq, int action, int idx = 0);
  70
  71         /// Size of the table (<0: hashtab)
  72        int size;
  73
  74         /// Holds the defined keys
  75         /** Both kinds of tables ends with NoSymbol */
  76         union
  77         {
  78                 /// Table for linear array
  79                 kb_key *table;
  80
  81                 /// Hash table holding key lists
  82                 kb_key **htable;
  83         };
  84 };
  85
  86
  87 /// Holds a key sequence and the current and standard keymaps
  88 class kb_sequence {
  89 public:
  90         ///
  91         kb_sequence() {
  92                 stdmap = curmap = 0;
  93                 sequence = staticseq;
  94                 modifiers = staticmod;
  95                 length = 0;
  96                 size = KB_PREALLOC;
  97         }
  98
  99         ///
 100
 101
 102         ///
 103         ~kb_sequence()
 104         {
 105                 if (sequence != staticseq) {
 106                         delete sequence;
 107                         delete modifiers;
 108                 }
 109         }
 110
 111         /// Add a key to the key sequence and look it up in the curmap
 112         /** Add a key to the key sequence and look it up in the curmap
 113           if the latter is defined. */
 114         int addkey(KeySym key, unsigned mod, unsigned nmod = 0);
 115
 116         ///
 117         int print(char *buf, int maxlen, bool when_defined = false) const; //RVDK_PATCH_5
 118
 119         ///
 120         int printOptions(char *buf, int maxlen) const;
 121
 122         /// Make length negative to mark the sequence as deleted
 123         void delseq();
 124
 125         ///
 126         char getiso();
 127
 128         ///
 129         KeySym getsym();
 130
 131         ///
 132         void reset();
 133
 134         ///
 135         int parse(char const *s);
 136
 137         /// Keymap to use if a new sequence is starting
 138         kb_keymap *stdmap;
 139
 140         /// Keymap to use for the next key
 141         kb_keymap *curmap;
 142
 143         /// Array holding the current key sequence
 144         /** If sequence[length-1] < 0xff it can be used as ISO8859 char */
 145         unsigned int *sequence;
 146
 147         ///
 148         unsigned int *modifiers;
 149
 150         /// Current length of key sequence
 151         int length;
 152
 153 private:
 154         /// Static array preallocated for sequence
 155         unsigned int staticseq[KB_PREALLOC];
 156
 157         ///
 158         unsigned int staticmod[KB_PREALLOC];
 159
 160         /// Physically allocated storage size
 161         int size;
 162 };
 163
 164 #endif