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New function to determine if keyboard layouts for both LTR and LTR

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2007-06-29  Matthias Clasen  <mclasen@redhat.com>

        * gdk/gdk.symbols:
        * gdk/gdkkeys.h:
        * gdk/x11/gdkkeys-x11.c (gdk_keymap_have_bidi_layouts): New
        function to determine if keyboard layouts for both LTR and LTR
        languages are in use. Refactor the direction caching code to
        make this information available.  (#451575, Behnam Esfahbod)



svn path=/trunk/; revision=18301
This commit is contained in:
Matthias Clasen 2007-06-30 01:43:04 +00:00 committed by Matthias Clasen
parent 5c31ca5c85
commit 436a34e318
6 changed files with 143 additions and 56 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
2007-06-29 Matthias Clasen <mclasen@redhat.com>
* gdk/gdk.symbols:
* gdk/gdkkeys.h:
* gdk/x11/gdkkeys-x11.c (gdk_keymap_have_bidi_layouts): New
function to determine if keyboard layouts for both LTR and LTR
languages are in use. Refactor the direction caching code to
make this information available. (#451575, Behnam Esfahbod)
2007-06-29 Matthias Clasen <mclasen@redhat.com>
* modules/printbackend/cups/gtkcupsutils.c (_post_check):

4
docs/reference/ChangeLog
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@ -1,3 +1,7 @@
2007-06-29 Matthias Clasen <mclasen@redhat.com>
* gdk/gdk-sections.txt: Add gdk_keymap_have_bidi_layouts
2007-06-29 Matthias Clasen <mclasen@redhat.com>
* gtk/migrating-GtkBuilder.sgml: An empty shell

1
docs/reference/gdk/gdk-sections.txt
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@ -980,6 +980,7 @@ gdk_keymap_translate_keyboard_state
gdk_keymap_get_entries_for_keyval
gdk_keymap_get_entries_for_keycode
gdk_keymap_get_direction
gdk_keymap_have_bidi_layouts
<SUBSECTION>
gdk_keyval_name

1
gdk/gdk.symbols
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@ -819,6 +819,7 @@ gdk_keymap_get_direction
gdk_keymap_get_entries_for_keycode
gdk_keymap_get_entries_for_keyval
gdk_keymap_get_for_display
gdk_keymap_have_bidi_layouts
gdk_keymap_lookup_key
gdk_keymap_translate_keyboard_state
gdk_keyval_convert_case

1
gdk/gdkkeys.h
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@ -101,6 +101,7 @@ gboolean gdk_keymap_get_entries_for_keycode (GdkKeymap *keymap,
guint **keyvals,
gint *n_entries);
PangoDirection gdk_keymap_get_direction (GdkKeymap *keymap);
gboolean gdk_keymap_have_bidi_layouts (GdkKeymap *keymap);
/* Key values
*/

183
gdk/x11/gdkkeys-x11.c
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@ -584,11 +584,83 @@ get_direction (XkbDescRec *xkb,
return PANGO_DIRECTION_LTR;
}
static PangoDirection
get_direction_from_cache (GdkKeymapX11 *keymap_x11,
XkbDescPtr xkb,
gint group)
{
Atom group_atom = xkb->names->groups[group];
gboolean cache_hit = FALSE;
DirectionCacheEntry *cache = keymap_x11->group_direction_cache;
PangoDirection direction = PANGO_DIRECTION_NEUTRAL;
gint i;
if (keymap_x11->have_direction)
{
/* lookup in cache */
for (i = 0; i < G_N_ELEMENTS (keymap_x11->group_direction_cache); i++)
{
if (cache[i].group_atom == group_atom)
{
cache_hit = TRUE;
cache[i].serial = keymap_x11->current_cache_serial++; /* freshen */
direction = cache[i].direction;
group_atom = cache[i].group_atom;
break;
}
}
}
else
{
/* initialize cache */
for (i = 0; i < G_N_ELEMENTS (keymap_x11->group_direction_cache); i++)
{
cache[i].group_atom = 0;
cache[i].serial = keymap_x11->current_cache_serial;
}
keymap_x11->current_cache_serial++;
}
/* insert in cache */
if (!cache_hit)
{
gint oldest = 0;
direction = get_direction (xkb, group);
/* remove the oldest entry */
for (i = 0; i < G_N_ELEMENTS (keymap_x11->group_direction_cache); i++)
{
if (cache[i].serial < cache[oldest].serial)
oldest = i;
}
cache[oldest].group_atom = group_atom;
cache[oldest].direction = direction;
cache[oldest].serial = keymap_x11->current_cache_serial++;
}
return direction;
}
static int
get_num_groups (GdkKeymap *keymap,
XkbDescPtr xkb)
{
Display *display = KEYMAP_XDISPLAY (keymap);
XkbGetControls(display, XkbSlowKeysMask, xkb);
XkbGetUpdatedMap (display, XkbKeySymsMask | XkbKeyTypesMask |
XkbModifierMapMask | XkbVirtualModsMask, xkb);
return xkb->ctrls->num_groups;
}
static void
update_direction (GdkKeymapX11 *keymap_x11,
gint group)
{
XkbDescRec *xkb = get_xkb (keymap_x11);
XkbDescPtr xkb = get_xkb (keymap_x11);
Atom group_atom;
group_atom = xkb->names->groups[group];
@ -596,61 +668,9 @@ update_direction (GdkKeymapX11 *keymap_x11,
/* a group change? */
if (!keymap_x11->have_direction || keymap_x11->current_group_atom != group_atom)
{
gboolean cache_hit = FALSE;
DirectionCacheEntry *cache = keymap_x11->group_direction_cache;
PangoDirection direction = PANGO_DIRECTION_NEUTRAL;
gint i;
if (keymap_x11->have_direction)
{
/* lookup in cache */
for (i = 0; i < G_N_ELEMENTS (keymap_x11->group_direction_cache); i++)
{
if (cache[i].group_atom == group_atom)
{
cache_hit = TRUE;
cache[i].serial = keymap_x11->current_cache_serial++; /* freshen */
direction = cache[i].direction;
group_atom = cache[i].group_atom;
break;
}
}
}
else
{
/* initialize cache */
for (i = 0; i < G_N_ELEMENTS (keymap_x11->group_direction_cache); i++)
{
cache[i].group_atom = 0;
cache[i].serial = keymap_x11->current_cache_serial;
}
keymap_x11->current_cache_serial++;
}
/* insert in cache */
if (!cache_hit)
{
gint oldest = 0;
direction = get_direction (xkb, group);
/* remove the oldest entry */
for (i = 0; i < G_N_ELEMENTS (keymap_x11->group_direction_cache); i++)
{
if (cache[i].serial < cache[oldest].serial)
oldest = i;
}
cache[oldest].group_atom = group_atom;
cache[oldest].direction = direction;
cache[oldest].serial = keymap_x11->current_cache_serial++;
}
keymap_x11->current_direction = get_direction_from_cache (keymap_x11, xkb, group);
keymap_x11->current_group_atom = group_atom;
keymap_x11->have_direction = TRUE;
keymap_x11->current_direction = direction;
}
}
@ -673,7 +693,7 @@ _gdk_keymap_state_changed (GdkDisplay *display,
had_direction = keymap_x11->have_direction;
direction = keymap_x11->current_direction;
update_direction (keymap_x11, xkb_event->state.locked_group);
update_direction (keymap_x11, XkbStateGroup (&xkb_event->state));
if (!had_direction || direction != keymap_x11->current_direction)
g_signal_emit_by_name (keymap_x11, "direction_changed");
@ -693,6 +713,15 @@ _gdk_keymap_keys_changed (GdkDisplay *display)
g_signal_emit_by_name (display_x11->keymap, "keys_changed", 0);
}
/**
* gdk_keymap_get_direction:
* @keymap: a #GdkKeymap or %NULL to use the default keymap
*
* Returns the direction of effective layout of the keymap.
*
* @Returns: %PANGO_DIRECTION_LTR or %PANGO_DIRECTION_RTL if determines the
* direction. %PANGO_DIRECTION_NEUTRAL otherwise.
**/
PangoDirection
gdk_keymap_get_direction (GdkKeymap *keymap)
{
@ -710,7 +739,7 @@ gdk_keymap_get_direction (GdkKeymap *keymap)
XkbGetState (GDK_DISPLAY_XDISPLAY (display), XkbUseCoreKbd,
&state_rec);
update_direction (keymap_x11, XkbGroupLock (&state_rec));
update_direction (keymap_x11, XkbStateGroup (&state_rec));
}
return keymap_x11->current_direction;
@ -720,6 +749,48 @@ gdk_keymap_get_direction (GdkKeymap *keymap)
return PANGO_DIRECTION_NEUTRAL;
}
/**
* gdk_keymap_have_bidi_layouts:
* @keymap: a #GdkKeymap or %NULL to use the default keymap
*
* Determines if keyboard layouts for both right-to-left and left-to-right
* languages are in use.
*
* @Returns: %TRUE if there are layouts in both directions, %FALSE otherwise
*
* Since: 2.12
**/
gboolean
gdk_keymap_have_bidi_layouts (GdkKeymap *keymap)
{
keymap = GET_EFFECTIVE_KEYMAP (keymap);
#if HAVE_XKB
if (KEYMAP_USE_XKB (keymap))
{
GdkKeymapX11 *keymap_x11 = GDK_KEYMAP_X11 (keymap);
XkbDescPtr xkb = get_xkb (keymap_x11);
int num_groups = get_num_groups (keymap, xkb);
int i;
gboolean have_ltr_keyboard = FALSE;
gboolean have_rtl_keyboard = FALSE;
for (i = 0; i < num_groups; i++)
{
if (get_direction_from_cache (keymap_x11, xkb, i) == PANGO_DIRECTION_RTL)
have_rtl_keyboard = TRUE;
else
have_ltr_keyboard = TRUE;
}
return have_ltr_keyboard && have_rtl_keyboard;
}
else
#endif /* HAVE_XKB */
return FALSE;
}
/**
* gdk_keymap_get_entries_for_keyval:
* @keymap: a #GdkKeymap, or %NULL to use the default keymap