/**
* gdk_x11_atom_to_xatom_for_display:
* @display: A #GdkDisplay
* @atom: A #GdkAtom, or %GDK_NONE
*
* Converts from a #GdkAtom to the X atom for a #GdkDisplay
* with the same string value. The special value %GDK_NONE
* is converted to %None.
*
* Return value: the X atom corresponding to @atom, or %None
*
* Since: 2.2
**/
Atom
gdk_x11_atom_to_xatom_for_display (GdkDisplay *display,
GdkAtom atom)
{
Atom xatom = None;
g_return_val_if_fail (GDK_IS_DISPLAY (display), None);
if (atom == GDK_NONE)
return None;
if (display->closed)
return None;
xatom = lookup_cached_xatom (display, atom);
if (!xatom)
{
char *name;
g_return_val_if_fail (ATOM_TO_INDEX (atom) < virtual_atom_array->len, None);
name = g_ptr_array_index (virtual_atom_array, ATOM_TO_INDEX (atom));
xatom = XInternAtom (GDK_DISPLAY_XDISPLAY (display), name, FALSE);
insert_atom_pair (display, atom, xatom);
}
return xatom;
}
/**
* gdk_x11_atom_to_xatom_for_display:
* @display: A #GdkDisplay
* @atom: A #GdkAtom
*
* Converts from a #GdkAtom to the X atom for a #GdkDisplay
* with the same string value.
*
* Return value: the X atom corresponding to @atom.
*
* Since: 2.2
**/
gi_atom_id_t
gdk_x11_atom_to_xatom_for_display (GdkDisplay *display,
GdkAtom atom)
{
gi_atom_id_t xatom = 0;
g_return_val_if_fail (GDK_IS_DISPLAY (display), 0);
if (display->closed)
return 0;
xatom = lookup_cached_xatom (display, atom);
if (!xatom)
{
char *name;
g_return_val_if_fail (ATOM_TO_INDEX (atom) < virtual_atom_array->len, 0);
name = g_ptr_array_index (virtual_atom_array, ATOM_TO_INDEX (atom));
xatom = gi_intern_atom ( name, FALSE);
insert_atom_pair (display, atom, xatom);
}
return xatom;
}
static const char *
get_atom_name (GdkAtom atom)
{
virtual_atom_check_init ();
if (ATOM_TO_INDEX (atom) < virtual_atom_array->len)
return g_ptr_array_index (virtual_atom_array, ATOM_TO_INDEX (atom));
else
return NULL;
}
static Atom
lookup_cached_xatom (GdkDisplay *display,
GdkAtom atom)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
if (ATOM_TO_INDEX (atom) < G_N_ELEMENTS (xatoms_offset) - N_CUSTOM_PREDEFINED)
return ATOM_TO_INDEX (atom);
if (display_x11->atom_from_virtual)
return GPOINTER_TO_UINT (g_hash_table_lookup (display_x11->atom_from_virtual,
GDK_ATOM_TO_POINTER (atom)));
return None;
}
static GdkAtom
intern_atom (const gchar *atom_name,
gboolean dup)
{
GdkAtom result;
virtual_atom_check_init ();
result = GDK_POINTER_TO_ATOM (g_hash_table_lookup (virtual_atom_hash, atom_name));
if (!result)
{
result = INDEX_TO_ATOM (virtual_atom_array->len);
g_ptr_array_add (virtual_atom_array, dup ? g_strdup (atom_name) : (gchar *)atom_name);
g_hash_table_insert (virtual_atom_hash,
g_ptr_array_index (virtual_atom_array,
ATOM_TO_INDEX (result)),
GDK_ATOM_TO_POINTER (result));
}
return result;
}
