kc3-lang/libxkbcommon/src/xkb.c

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• Hash : c65a3596
  Author :
  Date : 2012-05-22T10:59:46
  

  keytypes: use darray for xkb_kt_map_entry's Signed-off-by: Ran Benita <ran234@gmail.com>

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• src/xkb.c

• /************************************************************
  Copyright (c) 1993 by Silicon Graphics Computer Systems, Inc.
  
  Permission to use, copy, modify, and distribute this
  software and its documentation for any purpose and without
  fee is hereby granted, provided that the above copyright
  notice appear in all copies and that both that copyright
  notice and this permission notice appear in supporting
  documentation, and that the name of Silicon Graphics not be
  used in advertising or publicity pertaining to distribution
  of the software without specific prior written permission.
  Silicon Graphics makes no representation about the suitability
  of this software for any purpose. It is provided "as is"
  without any express or implied warranty.
  
  SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
  SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
  GRAPHICS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
  DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION  WITH
  THE USE OR PERFORMANCE OF THIS SOFTWARE.
  
  ********************************************************/
  
  #include "xkb-priv.h"
  
  static char *
  XkbcCanonicaliseComponent(char *name, const char *old)
  {
      char *tmp;
      int i;
  
      if (!name)
          return NULL;
  
      /* Treachery. */
      if (old && strchr(old, '%'))
          return NULL;
  
      if (name[0] == '+' || name[0] == '|') {
          if (old) {
              tmp = malloc(strlen(name) + strlen(old) + 1);
              if (!tmp)
                  return NULL;
              sprintf(tmp, "%s%s", old, name);
              free(name);
              name = tmp;
          }
          else {
              memmove(name, &name[1], strlen(&name[1]) + 1);
          }
      }
  
      for (i = 0; name[i]; i++) {
          if (name[i] == '%') {
              if (old) {
                  tmp = malloc(strlen(name) + strlen(old));
                  if (!tmp)
                      return NULL;
                  strncpy(tmp, name, i);
                  strcat(tmp + i, old);
                  strcat(tmp + i + strlen(old), &name[i + 1]);
                  free(name);
                  name = tmp;
                  i--;
              }
              else {
                  memmove(&name[i - 1], &name[i + 1], strlen(&name[i + 1]) + 1);
                  i -= 2;
              }
          }
      }
  
      return name;
  }
  
  _X_EXPORT void
  xkb_canonicalise_components(struct xkb_component_names * names,
                              const struct xkb_component_names * old)
  {
      names->keycodes = XkbcCanonicaliseComponent(names->keycodes,
                                                  old ? old->keycodes : NULL);
      names->compat = XkbcCanonicaliseComponent(names->compat,
                                                old ? old->compat : NULL);
      names->symbols = XkbcCanonicaliseComponent(names->symbols,
                                                 old ? old->symbols : NULL);
      names->types = XkbcCanonicaliseComponent(names->types,
                                               old ? old->types : NULL);
  }
  
  static bool
  VirtualModsToReal(struct xkb_keymap *keymap, unsigned virtual_mask,
                    unsigned *mask_rtrn)
  {
      int i, bit;
      unsigned mask;
  
      if (!keymap)
          return false;
      if (virtual_mask == 0) {
          *mask_rtrn = 0;
          return true;
      }
      if (!keymap->server)
          return false;
  
      for (i = mask = 0, bit = 1; i < XkbNumVirtualMods; i++, bit <<= 1) {
          if (virtual_mask & bit)
              mask |= keymap->server->vmods[i];
      }
  
      *mask_rtrn = mask;
      return true;
  }
  
  bool
  XkbcComputeEffectiveMap(struct xkb_keymap *keymap, struct xkb_key_type *type,
                          unsigned char *map_rtrn)
  {
      unsigned tmp;
      struct xkb_kt_map_entry * entry = NULL;
  
      if (!keymap || !type || !keymap->server)
          return false;
  
      if (type->mods.vmods != 0) {
          if (!VirtualModsToReal(keymap, type->mods.vmods, &tmp))
              return false;
  
          type->mods.mask = tmp | type->mods.real_mods;
          darray_foreach(entry, type->map) {
              tmp = 0;
              if (entry->mods.vmods != 0) {
                  if (!VirtualModsToReal(keymap, entry->mods.vmods, &tmp))
                      return false;
                  if (tmp == 0) {
                      entry->active = false;
                      continue;
                  }
              }
              entry->active = true;
              entry->mods.mask = (entry->mods.real_mods | tmp) & type->mods.mask;
          }
      }
      else
          type->mods.mask = type->mods.real_mods;
  
      if (map_rtrn) {
          memset(map_rtrn, 0, type->mods.mask + 1);
          if (entry && entry->active)
              darray_foreach(entry, type->map)
                  map_rtrn[entry->mods.mask] = entry->level;
      }
  
      return true;
  }
  

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