gdkkeys-win32.c

linux下电话本所依赖的一些图形库

		       * the next call to ToAsciiEx() with a different
		       * key would try to combine with the dead key.
		       */
		      reset_after_dead (key_state);

		      /* Use dead keysyms instead of "undead" ones */
		      handle_dead (keysym, ksymp);
		    }
		  else if (k == 0)
		    {
		      /* Seems to be necessary to "reset" the keyboard layout
		       * in this case, too. Otherwise problems on NT4.
		       */
		      reset_after_dead (key_state);
		    }
		  else
		    {
#if 0
		      GDK_NOTE (EVENTS,
				g_print ("%s returns %d "
					 "for vk:%02x, sc:%02x%s%s\n",
					 (G_WIN32_HAVE_WIDECHAR_API () ?
					  "ToUnicodeEx" : "ToAsciiEx"),
					 k, vk, scancode,
					 (shift&0x1 ? " shift" : ""),
					 (shift&0x2 ? " altgr" : "")));
#endif
		    }
		}
	      if (*ksymp == 0)
		*ksymp = GDK_VoidSymbol;
	    }
	  key_state[vk] = 0;

	  /* Check if keyboard has an AltGr key by checking if
	   * the mapping with Control+Alt is different.
	   */
	  if (!_gdk_keyboard_has_altgr)
	    if ((keysym_tab[vk*4 + 2] != GDK_VoidSymbol &&
		 keysym_tab[vk*4] != keysym_tab[vk*4 + 2]) ||
		(keysym_tab[vk*4 + 3] != GDK_VoidSymbol &&
		 keysym_tab[vk*4 + 1] != keysym_tab[vk*4 + 3]))
	      _gdk_keyboard_has_altgr = TRUE;
	  
	  if (!capslock_tested)
	    {
	      /* Can we use this virtual key to determine the CapsLock
	       * key behaviour: CapsLock or ShiftLock? If it generates
	       * keysyms for printable characters and has a shifted
	       * keysym that isn't just the upperacase of the
	       * unshifted keysym, check the behaviour of VK_CAPITAL.
	       */
	      if (g_unichar_isgraph (gdk_keyval_to_unicode (keysym_tab[vk*4 + 0])) &&
		  keysym_tab[vk*4 + 1] != keysym_tab[vk*4 + 0] &&
		  g_unichar_isgraph (gdk_keyval_to_unicode (keysym_tab[vk*4 + 1])) &&
		  keysym_tab[vk*4 + 1] != gdk_keyval_to_upper (keysym_tab[vk*4 + 0]))
		{
		  guchar chars[2];
		  
		  capslock_tested = TRUE;
		  
		  key_state[VK_SHIFT] = 0;
		  key_state[VK_CONTROL] = key_state[VK_MENU] = 0;
		  key_state[VK_CAPITAL] = 1;

		  if (ToAsciiEx (vk, scancode, key_state,
				 (LPWORD) chars, 0, _gdk_input_locale) == 1)
		    {
		      if (chars[0] >= GDK_space &&
			  chars[0] <= GDK_asciitilde &&
			  chars[0] == keysym_tab[vk*4 + 1])
			{
			  /* CapsLock acts as ShiftLock */
			  gdk_shift_modifiers |= GDK_LOCK_MASK;
			}
		    }
		  key_state[VK_CAPITAL] = 0;
		}    
	    }
	}
    }
  GDK_NOTE (EVENTS, print_keysym_tab ());
} 

GdkKeymap*
gdk_keymap_get_for_display (GdkDisplay *display)
{
  g_return_val_if_fail (display == gdk_display_get_default (), NULL);

  if (default_keymap == NULL)
    default_keymap = g_object_new (gdk_keymap_get_type (), NULL);

  return default_keymap;
}

PangoDirection
gdk_keymap_get_direction (GdkKeymap *keymap)
{
  update_keymap ();

  switch (PRIMARYLANGID (LOWORD ((DWORD) _gdk_input_locale)))
    {
    case LANG_HEBREW:
    case LANG_ARABIC:
#ifdef LANG_URDU
    case LANG_URDU:
#endif
    case LANG_FARSI:
      /* Others? */
      return PANGO_DIRECTION_RTL;

    default:
      return PANGO_DIRECTION_LTR;
    }
}

gboolean
gdk_keymap_get_entries_for_keyval (GdkKeymap     *keymap,
                                   guint          keyval,
                                   GdkKeymapKey **keys,
                                   gint          *n_keys)
{
  GArray *retval;

  g_return_val_if_fail (keymap == NULL || GDK_IS_KEYMAP (keymap), FALSE);
  g_return_val_if_fail (keys != NULL, FALSE);
  g_return_val_if_fail (n_keys != NULL, FALSE);
  g_return_val_if_fail (keyval != 0, FALSE);
  
  retval = g_array_new (FALSE, FALSE, sizeof (GdkKeymapKey));

  /* Accept only the default keymap */
  if (keymap == NULL || keymap == gdk_keymap_get_default ())
    {
      gint vk;
      
      update_keymap ();

      for (vk = 0; vk < 256; vk++)
	{
	  gint i;

	  for (i = 0; i < 4; i++)
	    {
	      if (keysym_tab[vk*4+i] == keyval)
		{
		  GdkKeymapKey key;
		  
		  key.keycode = vk;
		  
		  /* 2 levels (normal, shift), two groups (normal, AltGr) */
		  key.group = i / 2;
		  key.level = i % 2;
		  
		  g_array_append_val (retval, key);
		}
	    }
	}
    }

#ifdef G_ENABLE_DEBUG
  if (_gdk_debug_flags & GDK_DEBUG_EVENTS)
    {
      gint i;

      g_print ("gdk_keymap_get_entries_for_keyval: %#.04x (%s):",
	       keyval, gdk_keyval_name (keyval));
      for (i = 0; i < retval->len; i++)
	{
	  GdkKeymapKey *entry = (GdkKeymapKey *) retval->data + i;
	  g_print ("  %#.02x %d %d", entry->keycode, entry->group, entry->level);
	}
      g_print ("\n");
    }
#endif

  if (retval->len > 0)
    {
      *keys = (GdkKeymapKey*) retval->data;
      *n_keys = retval->len;
    }
  else
    {
      *keys = NULL;
      *n_keys = 0;
    }
      
  g_array_free (retval, retval->len > 0 ? FALSE : TRUE);

  return *n_keys > 0;
}

gboolean
gdk_keymap_get_entries_for_keycode (GdkKeymap     *keymap,
                                    guint          hardware_keycode,
                                    GdkKeymapKey **keys,
                                    guint        **keyvals,
                                    gint          *n_entries)
{
  GArray *key_array;
  GArray *keyval_array;

  g_return_val_if_fail (keymap == NULL || GDK_IS_KEYMAP (keymap), FALSE);
  g_return_val_if_fail (n_entries != NULL, FALSE);

  if (hardware_keycode <= 0 ||
      hardware_keycode >= 256)
    {
      if (keys)
        *keys = NULL;
      if (keyvals)
        *keyvals = NULL;

      *n_entries = 0;
      return FALSE;
    }
  
  if (keys)
    key_array = g_array_new (FALSE, FALSE, sizeof (GdkKeymapKey));
  else
    key_array = NULL;
  
  if (keyvals)
    keyval_array = g_array_new (FALSE, FALSE, sizeof (guint));
  else
    keyval_array = NULL;
  
  /* Accept only the default keymap */
  if (keymap == NULL || keymap == gdk_keymap_get_default ())
    {
      gint i;

      update_keymap ();

      for (i = 0; i < 4; i++)
	{
	  if (key_array)
            {
              GdkKeymapKey key;
	      
              key.keycode = hardware_keycode;
              
              key.group = i / 2;
              key.level = i % 2;
              
              g_array_append_val (key_array, key);
            }

          if (keyval_array)
            g_array_append_val (keyval_array, keysym_tab[hardware_keycode*4+i]);
	}
    }

  if ((key_array && key_array->len > 0) ||
      (keyval_array && keyval_array->len > 0))
    {
      if (keys)
        *keys = (GdkKeymapKey*) key_array->data;

      if (keyvals)
        *keyvals = (guint*) keyval_array->data;

      if (key_array)
        *n_entries = key_array->len;
      else
        *n_entries = keyval_array->len;
    }
  else
    {
      if (keys)
        *keys = NULL;

      if (keyvals)
        *keyvals = NULL;
      
      *n_entries = 0;
    }

  if (key_array)
    g_array_free (key_array, key_array->len > 0 ? FALSE : TRUE);
  if (keyval_array)
    g_array_free (keyval_array, keyval_array->len > 0 ? FALSE : TRUE);

  return *n_entries > 0;
}

guint
gdk_keymap_lookup_key (GdkKeymap          *keymap,
                       const GdkKeymapKey *key)
{
  guint sym;

  g_return_val_if_fail (keymap == NULL || GDK_IS_KEYMAP (keymap), 0);
  g_return_val_if_fail (key != NULL, 0);
  g_return_val_if_fail (key->group < 4, 0);
  
  /* Accept only the default keymap */
  if (keymap != NULL && keymap != gdk_keymap_get_default ())
    return 0;

  update_keymap ();
  
  if (key->keycode >= 256 ||
      key->group < 0 || key->group >= 2 ||
      key->level < 0 || key->level >= 2)
    return 0;
  
  sym = keysym_tab[key->keycode*4 + key->group*2 + key->level];
  
  if (sym == GDK_VoidSymbol)
    return 0;
  else
    return sym;
}

gboolean
gdk_keymap_translate_keyboard_state (GdkKeymap       *keymap,
                                     guint            hardware_keycode,
                                     GdkModifierType  state,
                                     gint             group,
                                     guint           *keyval,
                                     gint            *effective_group,
                                     gint            *level,
                                     GdkModifierType *consumed_modifiers)
{
  guint tmp_keyval;
  guint *keyvals;
  gint shift_level;
  gboolean ignore_shift = FALSE;
  gboolean ignore_group = FALSE;
      
  g_return_val_if_fail (keymap == NULL || GDK_IS_KEYMAP (keymap), FALSE);
  g_return_val_if_fail (group < 4, FALSE);
  
#if 0
  GDK_NOTE (EVENTS, g_print ("gdk_keymap_translate_keyboard_state: keycode=%#x state=%#x group=%d\n",
			     hardware_keycode, state, group));
#endif
  if (keyval)
    *keyval = 0;
  if (effective_group)
    *effective_group = 0;
  if (level)
    *level = 0;
  if (consumed_modifiers)
    *consumed_modifiers = 0;

  /* Accept only the default keymap */
  if (keymap != NULL && keymap != gdk_keymap_get_default ())
    return FALSE;

  if (hardware_keycode >= 256)
    return FALSE;

  if (group < 0 || group >= 2)
    return FALSE;

  update_keymap ();

  keyvals = keysym_tab + hardware_keycode*4;

  if ((state & GDK_LOCK_MASK) &&
      (state & GDK_SHIFT_MASK) &&
      ((gdk_shift_modifiers & GDK_LOCK_MASK) ||
       (keyvals[group*2 + 1] == gdk_keyval_to_upper (keyvals[group*2 + 0]))))
    /* Shift always disables ShiftLock. Shift disables CapsLock for
     * keys with lowercase/uppercase letter pairs.
     */
    shift_level = 0;
  else if (state & gdk_shift_modifiers)
    shift_level = 1;
  else
    shift_level = 0;

  /* Drop group and shift if there are no keysymbols on
   * the key for those.
   */
  if (shift_level == 1 &&
      keyvals[group*2 + 1] == GDK_VoidSymbol &&
      keyvals[group*2] != GDK_VoidSymbol)
    {
      shift_level = 0;
      ignore_shift = TRUE;
    }

  if (group == 1 &&
      keyvals[2 + shift_level] == GDK_VoidSymbol &&
      keyvals[0 + shift_level] != GDK_VoidSymbol)
    {
      group = 0;
      ignore_group = TRUE;
    }

  if (keyvals[group *2 + shift_level] == GDK_VoidSymbol &&
      keyvals[0 + 0] != GDK_VoidSymbol)
    {
      shift_level = 0;
      group = 0;
      ignore_group = TRUE;
      ignore_shift = TRUE;
    }

  /* See whether the group and shift level actually mattered
   * to know what to put in consumed_modifiers
   */
  if (keyvals[group*2 + 1] == GDK_VoidSymbol ||
      keyvals[group*2 + 0] == keyvals[group*2 + 1])
    ignore_shift = TRUE;

  if (keyvals[2 + shift_level] == GDK_VoidSymbol ||
      keyvals[0 + shift_level] == keyvals[2 + shift_level])
    ignore_group = TRUE;

  tmp_keyval = keyvals[group*2 + shift_level];

  /* If a true CapsLock is toggled, and Shift is not down,
   * and the shifted keysym is the uppercase of the unshifted,
   * use it.
   */
  if (!(gdk_shift_modifiers & GDK_LOCK_MASK) &&
      !(state & GDK_SHIFT_MASK) &&
      (state & GDK_LOCK_MASK))
    {
      guint upper = gdk_keyval_to_upper (tmp_keyval);
      if (upper == keyvals[group*2 + 1])
	tmp_keyval = upper;
    }

  if (keyval)
    *keyval = tmp_keyval;

  if (effective_group)
    *effective_group = group;

  if (level)
    *level = shift_level;

  if (consumed_modifiers)
    {
      *consumed_modifiers =
	(ignore_group ? 0 : GDK_MOD2_MASK) |
	(ignore_shift ? 0 : (GDK_SHIFT_MASK|GDK_LOCK_MASK));
    }
				
#if 0
  GDK_NOTE (EVENTS, g_print ("...group=%d level=%d cmods=%#x keyval=%s\n",
			     group, shift_level, tmp_modifiers, gdk_keyval_name (tmp_keyval)));
#endif

  return tmp_keyval != GDK_VoidSymbol;
}