src/kbmap.C

   1 /**
   2  * \file kbmap.C
   3  * Copyright 1995-2002 the LyX Team
   4  * Read the file COPYING
   5  *
   6  * \author unknown
   7  * \author John Levon <moz@compsoc.man.ac.uk>
   8  */
   9
  10 #include <config.h>
  11
  12 #ifdef __GNUG__
  13 #pragma implementation
  14 #endif
  15
  16 #include "kbmap.h"
  17 #include "commandtags.h"
  18 #include "kbsequence.h"
  19 #include "debug.h"
  20
  21 #include <X11/Xlib.h>
  22
  23 using std::endl;
  24
  25 // The only modifiers that we handle. We want to throw away things
  26 // like NumLock.
  27 enum { ModsMask = ShiftMask | ControlMask | Mod1Mask };
  28
  29
  30 string const kb_keymap::printKeysym(unsigned int key, key_modifier::state mod)
  31 {
  32         string buf;
  33
  34         char const * const s = XKeysymToString(key);
  35
  36         if (mod & key_modifier::shift) buf += "S-";
  37         if (mod & key_modifier::ctrl) buf += "C-";
  38         if (mod & key_modifier::alt) buf += "M-";
  39         if (s) buf += s;
  40         return buf;
  41 }
  42
  43
  44 char kb_keymap::getiso(unsigned int c)
  45 {
  46         switch (c & 0x0000FF00) {
  47                 // latin 1 byte 3 = 0
  48         case 0x00000000: break;
  49                 // latin 2 byte 3 = 1
  50         case 0x00000100:
  51                 // latin 3 byte 3 = 2
  52         case 0x00000200:
  53                 // latin 4 byte 3 = 3
  54         case 0x00000300:
  55                 // latin 8 byte 3 = 18 (0x12)
  56         case 0x00001200:
  57                 // latin 9 byte 3 = 19 (0x13)
  58         case 0x00001300:
  59                 c &= 0x000000FF;
  60                 break;
  61         default:
  62                 c = 0;
  63         }
  64         return c;
  65 }
  66
  67 string const kb_keymap::printKey(kb_key const & key) const
  68 {
  69         return printKeysym(key.code, key.mod.first);
  70 }
  71
  72
  73 string::size_type kb_keymap::bind(string const & seq, int action)
  74 {
  75         if (lyxerr.debugging(Debug::KBMAP)) {
  76                 lyxerr << "BIND: Sequence `"
  77                        << seq << "' Action `"
  78                        << action << "'" << endl;
  79         }
  80
  81         kb_sequence k(0, 0);
  82
  83         string::size_type const res = k.parse(seq);
  84         if (res == string::npos) {
  85                 defkey(&k, action);
  86         } else {
  87                 lyxerr[Debug::KBMAP] << "Parse error at position " << res
  88                                      << " in key sequence '" << seq << "'."
  89                                      << endl;
  90         }
  91
  92         return res;
  93 }
  94
  95
  96 int kb_keymap::lookup(unsigned int key,
  97                       key_modifier::state mod, kb_sequence * seq) const
  98 {
  99         if (table.empty()) {
 100                 seq->curmap = seq->stdmap;
 101                 seq->mark_deleted();
 102                 return LFUN_UNKNOWN_ACTION;
 103         }
 104
 105         for (Table::const_iterator cit = table.begin();
 106              cit != table.end(); ++cit) {
 107                 key_modifier::state mask(cit->mod.second);
 108                 key_modifier::state check =
 109                         static_cast<key_modifier::state>(mod & ~mask);
 110
 111                 if (cit->code == key && cit->mod.first == check) {
 112                         // match found
 113                         if (cit->table.get()) {
 114                                 // this is a prefix key - set new map
 115                                 seq->curmap = cit->table.get();
 116                                 return LFUN_PREFIX;
 117                         } else {
 118                                 // final key - reset map
 119                                 seq->curmap = seq->stdmap;
 120                                 seq->mark_deleted();
 121                                 return cit->action;
 122                         }
 123                 }
 124         }
 125
 126         // error - key not found:
 127         seq->curmap = seq->stdmap;
 128         seq->mark_deleted();
 129         return LFUN_UNKNOWN_ACTION;
 130 }
 131
 132
 133 string const kb_keymap::print() const
 134 {
 135         string buf;
 136         for (Table::const_iterator cit = table.begin();
 137              cit != table.end(); ++cit) {
 138                 buf += printKey((*cit));
 139                 buf += ' ';
 140         }
 141         return buf;
 142 }
 143
 144
 145 void kb_keymap::defkey(kb_sequence * seq, int action, unsigned int r)
 146 {
 147         unsigned int const code = seq->sequence[r];
 148         if (code == NoSymbol) return;
 149
 150         key_modifier::state const mod1 = seq->modifiers[r].first;
 151         key_modifier::state const mod2 = seq->modifiers[r].second;
 152
 153         // check if key is already there
 154         for (Table::iterator it = table.begin(); it != table.end(); ++it) {
 155                 if (code == it->code && mod1 == it->mod.first && mod2 == it->mod.second) {
 156                         // overwrite binding
 157                         if (r + 1 == seq->length()) {
 158                                 lyxerr[Debug::KBMAP]
 159                                         << "Warning: New binding for '"
 160                                         << seq->print()
 161                                         << "' is overriding old binding..."
 162                                         << endl;
 163                                 if (it->table.get()) {
 164                                         it->table.reset();
 165                                 }
 166                                 it->action = action;
 167                                 return;
 168                         } else if (!it->table.get()) {
 169                                 lyxerr << "Error: New binding for '" << seq->print()
 170                                        << "' is overriding old binding..."
 171                                                << endl;
 172                                 return;
 173                         } else {
 174                                 it->table->defkey(seq, action, r + 1);
 175                                 return;
 176                         }
 177                 }
 178         }
 179
 180         Table::iterator newone = table.insert(table.end(), kb_key());
 181         newone->code = code;
 182         newone->mod = seq->modifiers[r];
 183         if (r + 1 == seq->length()) {
 184                 newone->action = action;
 185                 newone->table.reset();
 186                 return;
 187         } else {
 188                 newone->table.reset(new kb_keymap);
 189                 newone->table->defkey(seq, action, r + 1);
 190                 return;
 191         }
 192 }
 193
 194
 195 string const kb_keymap::findbinding(int act, string const & prefix) const
 196 {
 197         string res;
 198         if (table.empty()) return res;
 199
 200         Table::const_iterator end = table.end();
 201         for (Table::const_iterator cit = table.begin();
 202             cit != end; ++cit) {
 203                 if (cit->table.get()) {
 204                         res += cit->table->findbinding(act,
 205                                                        prefix
 206                                                        + printKey((*cit))
 207                                                        + " ");
 208                 } else if (cit->action == act) {
 209                         res += "[";
 210                         res += prefix + printKey((*cit));
 211                         res += "] ";
 212                 }
 213         }
 214         return res;
 215 }