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mutter/src/backends/x11/meta-keymap-x11.c
Jonas Ådahl ce3fa3938a clutter/keymap: Make caps and num lock state properties 
This removes the responsibility of tracking these from the backend to
the base object. The backends are instead responsible for calling the
function to update the values.

For the native backend, it's important that this happens on the correct
thread, so each time either of these states may change, post a idle
callback on the main thread that sets the, at the time of queuing said
callback, up to date state. This means that things on the main thread
will always be able to get a "new enough but not too new" state when
listening on the 'notify::' signals and getting the property value
after.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1739>
2021-03-04 17:39:08 +00:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2010 Intel Corp.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Emmanuele Bassi <ebassi@linux.intel.com>
*/
#include "config.h"
#include <X11/Xatom.h>
#include <X11/XKBlib.h>
#include "backends/meta-backend-private.h"
#include "backends/meta-input-settings-private.h"
#include "backends/x11/meta-keymap-x11.h"
#include "clutter/clutter.h"
#include "clutter/clutter-keymap-private.h"
#include "clutter/clutter-mutter.h"
#include "clutter/x11/clutter-x11.h"
typedef struct _DirectionCacheEntry DirectionCacheEntry;
typedef struct _ClutterKeymapKey ClutterKeymapKey;
struct _ClutterKeymapKey
{
uint32_t keycode;
uint32_t group;
uint32_t level;
};
struct _DirectionCacheEntry
{
uint32_t serial;
Atom group_atom;
PangoDirection direction;
};
struct _MetaKeymapX11
{
ClutterKeymap parent_instance;
ClutterBackend *backend;
int min_keycode;
int max_keycode;
ClutterModifierType modmap[8];
ClutterModifierType num_lock_mask;
ClutterModifierType scroll_lock_mask;
ClutterModifierType level3_shift_mask;
PangoDirection current_direction;
XkbDescPtr xkb_desc;
int xkb_event_base;
uint32_t xkb_map_serial;
Atom current_group_atom;
uint32_t current_cache_serial;
DirectionCacheEntry group_direction_cache[4];
int current_group;
GHashTable *reserved_keycodes;
GQueue *available_keycodes;
uint32_t keymap_serial;
uint32_t has_direction : 1;
uint32_t use_xkb : 1;
uint32_t have_xkb_autorepeat : 1;
};
enum
{
PROP_0,
PROP_BACKEND,
PROP_LAST
};
static GParamSpec *obj_props[PROP_LAST] = { NULL, };
G_DEFINE_TYPE (MetaKeymapX11, meta_keymap_x11, CLUTTER_TYPE_KEYMAP)
/* code adapted from gdk/x11/gdkkeys-x11.c - update_modmap */
static void
update_modmap (Display *display,
MetaKeymapX11 *keymap_x11)
{
static struct {
const char *name;
Atom atom;
ClutterModifierType mask;
} vmods[] = {
{ "Meta", 0, CLUTTER_META_MASK },
{ "Super", 0, CLUTTER_SUPER_MASK },
{ "Hyper", 0, CLUTTER_HYPER_MASK },
{ NULL, 0, 0 }
};
int i, j, k;
if (vmods[0].atom == 0)
for (i = 0; vmods[i].name; i++)
vmods[i].atom = XInternAtom (display, vmods[i].name, FALSE);
for (i = 0; i < 8; i++)
keymap_x11->modmap[i] = 1 << i;
for (i = 0; i < XkbNumVirtualMods; i++)
{
for (j = 0; vmods[j].atom; j++)
{
if (keymap_x11->xkb_desc->names->vmods[i] == vmods[j].atom)
{
for (k = 0; k < 8; k++)
{
if (keymap_x11->xkb_desc->server->vmods[i] & (1 << k))
keymap_x11->modmap[k] |= vmods[j].mask;
}
}
}
}
}
static XkbDescPtr
get_xkb (MetaKeymapX11 *keymap_x11)
{
Display *xdisplay = clutter_x11_get_default_display ();
if (keymap_x11->max_keycode == 0)
XDisplayKeycodes (xdisplay,
&keymap_x11->min_keycode,
&keymap_x11->max_keycode);
if (keymap_x11->xkb_desc == NULL)
{
int flags = XkbKeySymsMask
| XkbKeyTypesMask
| XkbModifierMapMask
| XkbVirtualModsMask;
keymap_x11->xkb_desc = XkbGetMap (xdisplay, flags, XkbUseCoreKbd);
if (G_UNLIKELY (keymap_x11->xkb_desc == NULL))
{
g_error ("Failed to get the keymap from XKB");
return NULL;
}
flags = XkbGroupNamesMask | XkbVirtualModNamesMask;
XkbGetNames (xdisplay, flags, keymap_x11->xkb_desc);
update_modmap (xdisplay, keymap_x11);
}
else if (keymap_x11->xkb_map_serial != keymap_x11->keymap_serial)
{
int flags = XkbKeySymsMask
| XkbKeyTypesMask
| XkbModifierMapMask
| XkbVirtualModsMask;
XkbGetUpdatedMap (xdisplay, flags, keymap_x11->xkb_desc);
flags = XkbGroupNamesMask | XkbVirtualModNamesMask;
XkbGetNames (xdisplay, flags, keymap_x11->xkb_desc);
update_modmap (xdisplay, keymap_x11);
keymap_x11->xkb_map_serial = keymap_x11->keymap_serial;
}
if (keymap_x11->num_lock_mask == 0)
keymap_x11->num_lock_mask = XkbKeysymToModifiers (xdisplay, XK_Num_Lock);
if (keymap_x11->scroll_lock_mask == 0)
keymap_x11->scroll_lock_mask = XkbKeysymToModifiers (xdisplay,
XK_Scroll_Lock);
if (keymap_x11->level3_shift_mask == 0)
keymap_x11->level3_shift_mask = XkbKeysymToModifiers (xdisplay,
XK_ISO_Level3_Shift);
return keymap_x11->xkb_desc;
}
static void
update_locked_mods (MetaKeymapX11 *keymap_x11,
int locked_mods)
{
ClutterKeymap *keymap = CLUTTER_KEYMAP (keymap_x11);
gboolean caps_lock_state;
gboolean num_lock_state;
gboolean old_num_lock_state;
caps_lock_state = !!(locked_mods & CLUTTER_LOCK_MASK);
num_lock_state = !!(locked_mods & keymap_x11->num_lock_mask);
old_num_lock_state = clutter_keymap_get_num_lock_state (keymap);
clutter_keymap_set_lock_modifier_state (CLUTTER_KEYMAP (keymap_x11),
caps_lock_state,
num_lock_state);
if (num_lock_state != old_num_lock_state)
{
MetaBackend *backend;
MetaInputSettings *input_settings;
backend = meta_get_backend ();
input_settings = meta_backend_get_input_settings (backend);
if (input_settings)
{
meta_input_settings_maybe_save_numlock_state (input_settings,
num_lock_state);
}
}
}
/* the code to retrieve the keymap direction and cache it
* is taken from GDK:
* gdk/x11/gdkkeys-x11.c
*/
static PangoDirection
get_direction (XkbDescPtr xkb,
int group)
{
int rtl_minus_ltr = 0; /* total number of RTL keysyms minus LTR ones */
int code;
for (code = xkb->min_key_code;
code <= xkb->max_key_code;
code += 1)
{
int level = 0;
KeySym sym = XkbKeySymEntry (xkb, code, level, group);
PangoDirection dir =
_clutter_pango_unichar_direction (clutter_keysym_to_unicode (sym));
switch (dir)
{
case PANGO_DIRECTION_RTL:
rtl_minus_ltr++;
break;
case PANGO_DIRECTION_LTR:
rtl_minus_ltr--;
break;
default:
break;
}
}
if (rtl_minus_ltr > 0)
return PANGO_DIRECTION_RTL;
return PANGO_DIRECTION_LTR;
}
static PangoDirection
get_direction_from_cache (MetaKeymapX11 *keymap_x11,
XkbDescPtr xkb,
int group)
{
Atom group_atom = xkb->names->groups[group];
gboolean cache_hit = FALSE;
DirectionCacheEntry *cache = keymap_x11->group_direction_cache;
PangoDirection direction = PANGO_DIRECTION_NEUTRAL;
int i;
if (keymap_x11->has_direction)
{
/* look up in the 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++;
direction = cache[i].direction;
group_atom = cache[i].group_atom;
break;
}
}
}
else
{
/* initialize the cache */
for (i = 0; i < G_N_ELEMENTS (keymap_x11->group_direction_cache); i++)
{
cache[i].group_atom = 0;
cache[i].direction = PANGO_DIRECTION_NEUTRAL;
cache[i].serial = keymap_x11->current_cache_serial;
}
keymap_x11->current_cache_serial += 1;
}
/* insert the new entry in the cache */
if (!cache_hit)
{
int oldest = 0;
direction = get_direction (xkb, group);
/* replace 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 void
update_direction (MetaKeymapX11 *keymap_x11,
int group)
{
XkbDescPtr xkb = get_xkb (keymap_x11);
Atom group_atom;
group_atom = xkb->names->groups[group];
if (!keymap_x11->has_direction || keymap_x11->current_group_atom != group_atom)
{
keymap_x11->current_direction = get_direction_from_cache (keymap_x11, xkb, group);
keymap_x11->current_group_atom = group_atom;
keymap_x11->has_direction = TRUE;
}
}
static void
meta_keymap_x11_constructed (GObject *object)
{
MetaKeymapX11 *keymap_x11 = META_KEYMAP_X11 (object);
Display *xdisplay = clutter_x11_get_default_display ();
int xkb_major = XkbMajorVersion;
int xkb_minor = XkbMinorVersion;
g_assert (keymap_x11->backend != NULL);
if (XkbLibraryVersion (&xkb_major, &xkb_minor))
{
xkb_major = XkbMajorVersion;
xkb_minor = XkbMinorVersion;
if (XkbQueryExtension (xdisplay,
NULL,
&keymap_x11->xkb_event_base,
NULL,
&xkb_major, &xkb_minor))
{
Bool detectable_autorepeat_supported;
keymap_x11->use_xkb = TRUE;
XkbSelectEvents (xdisplay,
XkbUseCoreKbd,
XkbNewKeyboardNotifyMask | XkbMapNotifyMask | XkbStateNotifyMask,
XkbNewKeyboardNotifyMask | XkbMapNotifyMask | XkbStateNotifyMask);
XkbSelectEventDetails (xdisplay,
XkbUseCoreKbd, XkbStateNotify,
XkbAllStateComponentsMask,
XkbGroupLockMask | XkbModifierLockMask);
/* enable XKB autorepeat */
XkbSetDetectableAutoRepeat (xdisplay,
True,
&detectable_autorepeat_supported);
keymap_x11->have_xkb_autorepeat = detectable_autorepeat_supported;
}
}
}
static void
meta_keymap_x11_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
MetaKeymapX11 *keymap = META_KEYMAP_X11 (object);
switch (prop_id)
{
case PROP_BACKEND:
keymap->backend = g_value_get_object (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
meta_keymap_x11_refresh_reserved_keycodes (MetaKeymapX11 *keymap_x11)
{
Display *dpy = clutter_x11_get_default_display ();
GHashTableIter iter;
gpointer key, value;
g_hash_table_iter_init (&iter, keymap_x11->reserved_keycodes);
while (g_hash_table_iter_next (&iter, &key, &value))
{
uint32_t reserved_keycode = GPOINTER_TO_UINT (key);
uint32_t reserved_keysym = GPOINTER_TO_UINT (value);
uint32_t actual_keysym = XkbKeycodeToKeysym (dpy, reserved_keycode, 0, 0);
/* If an available keycode is no longer mapped to the stored keysym, then
* the keycode should not be considered available anymore and should be
* removed both from the list of available and reserved keycodes.
*/
if (reserved_keysym != actual_keysym)
{
g_hash_table_iter_remove (&iter);
g_queue_remove (keymap_x11->available_keycodes, key);
}
}
}
static gboolean
meta_keymap_x11_replace_keycode (MetaKeymapX11 *keymap_x11,
KeyCode keycode,
KeySym keysym)
{
if (keymap_x11->use_xkb)
{
Display *dpy = clutter_x11_get_default_display ();
XkbDescPtr xkb = get_xkb (keymap_x11);
XkbMapChangesRec changes;
XFlush (dpy);
xkb->device_spec = XkbUseCoreKbd;
memset (&changes, 0, sizeof(changes));
if (keysym != NoSymbol)
{
int types[XkbNumKbdGroups] = { XkbOneLevelIndex };
XkbChangeTypesOfKey (xkb, keycode, 1, XkbGroup1Mask, types, &changes);
XkbKeySymEntry (xkb, keycode, 0, 0) = keysym;
}
else
{
/* Reset to NoSymbol */
XkbChangeTypesOfKey (xkb, keycode, 0, XkbGroup1Mask, NULL, &changes);
}
changes.changed = XkbKeySymsMask | XkbKeyTypesMask;
changes.first_key_sym = keycode;
changes.num_key_syms = 1;
changes.first_type = 0;
changes.num_types = xkb->map->num_types;
XkbChangeMap (dpy, xkb, &changes);
XFlush (dpy);
return TRUE;
}
return FALSE;
}
static void
meta_keymap_x11_finalize (GObject *object)
{
MetaKeymapX11 *keymap;
GHashTableIter iter;
gpointer key, value;
keymap = META_KEYMAP_X11 (object);
meta_keymap_x11_refresh_reserved_keycodes (keymap);
g_hash_table_iter_init (&iter, keymap->reserved_keycodes);
while (g_hash_table_iter_next (&iter, &key, &value))
{
uint32_t keycode = GPOINTER_TO_UINT (key);
meta_keymap_x11_replace_keycode (keymap, keycode, NoSymbol);
}
g_hash_table_destroy (keymap->reserved_keycodes);
g_queue_free (keymap->available_keycodes);
if (keymap->xkb_desc != NULL)
XkbFreeKeyboard (keymap->xkb_desc, XkbAllComponentsMask, True);
G_OBJECT_CLASS (meta_keymap_x11_parent_class)->finalize (object);
}
static PangoDirection
meta_keymap_x11_get_direction (ClutterKeymap *keymap)
{
MetaKeymapX11 *keymap_x11;
g_return_val_if_fail (META_IS_KEYMAP_X11 (keymap), PANGO_DIRECTION_NEUTRAL);
keymap_x11 = META_KEYMAP_X11 (keymap);
if (keymap_x11->use_xkb)
{
if (!keymap_x11->has_direction)
{
XkbStateRec state_rec;
XkbGetState (clutter_x11_get_default_display (),
XkbUseCoreKbd, &state_rec);
update_direction (keymap_x11, XkbStateGroup (&state_rec));
}
return keymap_x11->current_direction;
}
else
{
return PANGO_DIRECTION_NEUTRAL;
}
}
static void
meta_keymap_x11_class_init (MetaKeymapX11Class *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterKeymapClass *keymap_class = CLUTTER_KEYMAP_CLASS (klass);
obj_props[PROP_BACKEND] =
g_param_spec_object ("backend",
"Backend",
"The Clutter backend",
CLUTTER_TYPE_BACKEND,
G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY);
gobject_class->constructed = meta_keymap_x11_constructed;
gobject_class->set_property = meta_keymap_x11_set_property;
gobject_class->finalize = meta_keymap_x11_finalize;
keymap_class->get_direction = meta_keymap_x11_get_direction;
g_object_class_install_properties (gobject_class, PROP_LAST, obj_props);
}
static void
meta_keymap_x11_init (MetaKeymapX11 *keymap)
{
keymap->current_direction = PANGO_DIRECTION_NEUTRAL;
keymap->current_group = -1;
keymap->reserved_keycodes = g_hash_table_new (NULL, NULL);
keymap->available_keycodes = g_queue_new ();
}
gboolean
meta_keymap_x11_handle_event (MetaKeymapX11 *keymap_x11,
XEvent *xevent)
{
gboolean retval;
if (!keymap_x11->use_xkb)
return FALSE;
retval = FALSE;
if (xevent->type == keymap_x11->xkb_event_base)
{
XkbEvent *xkb_event = (XkbEvent *) xevent;
switch (xkb_event->any.xkb_type)
{
case XkbStateNotify:
g_debug ("Updating keyboard state");
keymap_x11->current_group = XkbStateGroup (&xkb_event->state);
update_direction (keymap_x11, keymap_x11->current_group);
update_locked_mods (keymap_x11, xkb_event->state.locked_mods);
retval = TRUE;
break;
case XkbNewKeyboardNotify:
case XkbMapNotify:
g_debug ("Updating keyboard mapping");
XkbRefreshKeyboardMapping (&xkb_event->map);
keymap_x11->keymap_serial += 1;
retval = TRUE;
break;
default:
break;
}
}
else if (xevent->type == MappingNotify)
{
XRefreshKeyboardMapping (&xevent->xmapping);
keymap_x11->keymap_serial += 1;
retval = TRUE;
}
return retval;
}
int
meta_keymap_x11_get_key_group (MetaKeymapX11 *keymap,
ClutterModifierType state)
{
return XkbGroupForCoreState (state);
}
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
/* XXX - yes, I know that XKeycodeToKeysym() has been deprecated; hopefully,
* this code will never get run on any decent system that is also able to
* run Clutter. I just don't want to copy the implementation inside GDK for
* a fallback path.
*/
static int
translate_keysym (MetaKeymapX11 *keymap,
uint32_t hardware_keycode)
{
int retval;
retval = XKeycodeToKeysym (clutter_x11_get_default_display (),
hardware_keycode, 0);
return retval;
}
G_GNUC_END_IGNORE_DEPRECATIONS
int
meta_keymap_x11_translate_key_state (MetaKeymapX11 *keymap,
uint32_t hardware_keycode,
ClutterModifierType *modifier_state_p,
ClutterModifierType *mods_p)
{
ClutterModifierType unconsumed_modifiers = 0;
ClutterModifierType modifier_state = *modifier_state_p;
int retval;
g_return_val_if_fail (META_IS_KEYMAP_X11 (keymap), 0);
if (keymap->use_xkb)
{
XkbDescRec *xkb = get_xkb (keymap);
KeySym tmp_keysym;
if (XkbTranslateKeyCode (xkb, hardware_keycode, modifier_state,
&unconsumed_modifiers,
&tmp_keysym))
{
retval = tmp_keysym;
}
else
retval = 0;
}
else
retval = translate_keysym (keymap, hardware_keycode);
if (mods_p)
*mods_p = unconsumed_modifiers;
*modifier_state_p = modifier_state & ~(keymap->num_lock_mask |
keymap->scroll_lock_mask |
LockMask);
return retval;
}
gboolean
meta_keymap_x11_get_is_modifier (MetaKeymapX11 *keymap,
int keycode)
{
g_return_val_if_fail (META_IS_KEYMAP_X11 (keymap), FALSE);
if (keycode < keymap->min_keycode || keycode > keymap->max_keycode)
return FALSE;
if (keymap->use_xkb)
{
XkbDescRec *xkb = get_xkb (keymap);
if (xkb->map->modmap && xkb->map->modmap[keycode] != 0)
return TRUE;
}
return FALSE;
}
static gboolean
meta_keymap_x11_get_entries_for_keyval (MetaKeymapX11 *keymap_x11,
uint32_t keyval,
ClutterKeymapKey **keys,
int *n_keys)
{
if (keymap_x11->use_xkb)
{
XkbDescRec *xkb = get_xkb (keymap_x11);
GArray *retval;
int keycode;
keycode = keymap_x11->min_keycode;
retval = g_array_new (FALSE, FALSE, sizeof (ClutterKeymapKey));
while (keycode <= keymap_x11->max_keycode)
{
int max_shift_levels = XkbKeyGroupsWidth (xkb, keycode);
int group = 0;
int level = 0;
int total_syms = XkbKeyNumSyms (xkb, keycode);
int i = 0;
KeySym *entry;
/* entry is an array with all syms for group 0, all
* syms for group 1, etc. and for each group the
* shift level syms are in order
*/
entry = XkbKeySymsPtr (xkb, keycode);
while (i < total_syms)
{
g_assert (i == (group * max_shift_levels + level));
if (entry[i] == keyval)
{
ClutterKeymapKey key;
key.keycode = keycode;
key.group = group;
key.level = level;
g_array_append_val (retval, key);
g_assert (XkbKeySymEntry (xkb, keycode, level, group) ==
keyval);
}
++level;
if (level == max_shift_levels)
{
level = 0;
++group;
}
++i;
}
++keycode;
}
if (retval->len > 0)
{
*keys = (ClutterKeymapKey*) 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;
}
else
{
return FALSE;
}
}
static uint32_t
meta_keymap_x11_get_available_keycode (MetaKeymapX11 *keymap_x11)
{
if (keymap_x11->use_xkb)
{
meta_keymap_x11_refresh_reserved_keycodes (keymap_x11);
if (g_hash_table_size (keymap_x11->reserved_keycodes) < 5)
{
Display *dpy = clutter_x11_get_default_display ();
XkbDescPtr xkb = get_xkb (keymap_x11);
uint32_t i;
for (i = xkb->max_key_code; i >= xkb->min_key_code; --i)
{
if (XkbKeycodeToKeysym (dpy, i, 0, 0) == NoSymbol)
return i;
}
}
return GPOINTER_TO_UINT (g_queue_pop_head (keymap_x11->available_keycodes));
}
return 0;
}
gboolean
meta_keymap_x11_reserve_keycode (MetaKeymapX11 *keymap_x11,
uint32_t keyval,
uint32_t *keycode_out)
{
g_return_val_if_fail (META_IS_KEYMAP_X11 (keymap_x11), FALSE);
g_return_val_if_fail (keyval != 0, FALSE);
g_return_val_if_fail (keycode_out != NULL, FALSE);
*keycode_out = meta_keymap_x11_get_available_keycode (keymap_x11);
if (*keycode_out == NoSymbol)
{
g_warning ("Cannot reserve a keycode for keyval %d: no available keycode", keyval);
return FALSE;
}
if (!meta_keymap_x11_replace_keycode (keymap_x11, *keycode_out, keyval))
{
g_warning ("Failed to remap keycode %d to keyval %d", *keycode_out, keyval);
return FALSE;
}
g_hash_table_insert (keymap_x11->reserved_keycodes, GUINT_TO_POINTER (*keycode_out), GUINT_TO_POINTER (keyval));
g_queue_remove (keymap_x11->available_keycodes, GUINT_TO_POINTER (*keycode_out));
return TRUE;
}
void
meta_keymap_x11_release_keycode_if_needed (MetaKeymapX11 *keymap_x11,
uint32_t keycode)
{
g_return_if_fail (META_IS_KEYMAP_X11 (keymap_x11));
if (!g_hash_table_contains (keymap_x11->reserved_keycodes, GUINT_TO_POINTER (keycode)) ||
g_queue_index (keymap_x11->available_keycodes, GUINT_TO_POINTER (keycode)) != -1)
return;
g_queue_push_tail (keymap_x11->available_keycodes, GUINT_TO_POINTER (keycode));
}
void
meta_keymap_x11_latch_modifiers (MetaKeymapX11 *keymap_x11,
uint32_t level,
gboolean enable)
{
uint32_t modifiers[] = {
0,
ShiftMask,
keymap_x11->level3_shift_mask,
keymap_x11->level3_shift_mask | ShiftMask,
};
uint32_t value = 0;
if (!keymap_x11->use_xkb)
return;
level = CLAMP (level, 0, G_N_ELEMENTS (modifiers) - 1);
if (enable)
value = modifiers[level];
else
value = 0;
XkbLatchModifiers (clutter_x11_get_default_display (),
XkbUseCoreKbd, modifiers[level],
value);
}
static uint32_t
meta_keymap_x11_get_current_group (MetaKeymapX11 *keymap_x11)
{
XkbStateRec state_rec;
if (keymap_x11->current_group >= 0)
return keymap_x11->current_group;
XkbGetState (clutter_x11_get_default_display (),
XkbUseCoreKbd, &state_rec);
return XkbStateGroup (&state_rec);
}
gboolean
meta_keymap_x11_keycode_for_keyval (MetaKeymapX11 *keymap_x11,
uint32_t keyval,
uint32_t *keycode_out,
uint32_t *level_out)
{
ClutterKeymapKey *keys;
int i, n_keys, group;
gboolean found = FALSE;
g_return_val_if_fail (keycode_out != NULL, FALSE);
g_return_val_if_fail (level_out != NULL, FALSE);
group = meta_keymap_x11_get_current_group (keymap_x11);
if (!meta_keymap_x11_get_entries_for_keyval (keymap_x11, keyval, &keys, &n_keys))
return FALSE;
for (i = 0; i < n_keys && !found; i++)
{
if (keys[i].group == group)
{
*keycode_out = keys[i].keycode;
*level_out = keys[i].level;
found = TRUE;
}
}
if (!found)
{
GHashTableIter iter;
gpointer key, value;
g_hash_table_iter_init (&iter, keymap_x11->reserved_keycodes);
while (!found && g_hash_table_iter_next (&iter, &key, &value))
{
uint32_t reserved_keycode = GPOINTER_TO_UINT (key);
uint32_t reserved_keysym = GPOINTER_TO_UINT (value);
if (keyval == reserved_keysym)
{
*keycode_out = reserved_keycode;
*level_out = 0;
found = TRUE;
}
}
}
g_free (keys);
return found;
}
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