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gtk/gdk/x11/gdkkeys-x11.c
Bastien Nocera 8b6934bc2c reviewed by: Matthias Clasen <maclas@gmx.de> 
2004-06-25  Bastien Nocera  <hadess@hadess.net>

	reviewed by: Matthias Clasen  <maclas@gmx.de>

	* gdk/x11/gdkkeys-x11.c: (get_symbol), (update_keymaps),
	(gdk_keymap_lookup_key), (translate_keysym): fix keys parsing when
	the number of keysyms per keycode is odd. Fixes #144808.
2004-06-25 15:21:43 +00:00

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 2000 Red Hat, Inc.
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include "gdk.h"
#include "gdkx.h"
#include "gdkprivate-x11.h"
#include "gdkinternals.h"
#include "gdkdisplay-x11.h"
#include "gdkkeysyms.h"
#ifdef HAVE_XKB
#include <X11/XKBlib.h>
/* OSF-4.0 is apparently missing this macro
*/
# ifndef XkbKeySymEntry
# define XkbKeySymEntry(d,k,sl,g) \
(XkbKeySym(d,k,((XkbKeyGroupsWidth(d,k)*(g))+(sl))))
# endif
#endif /* HAVE_XKB */
typedef struct _GdkKeymapX11 GdkKeymapX11;
#define GDK_TYPE_KEYMAP_X11 (gdk_keymap_x11_get_type ())
#define GDK_KEYMAP_X11(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_KEYMAP_X11, GdkKeymapX11))
#define GDK_IS_KEYMAP_X11(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_KEYMAP_X11))
struct _GdkKeymapX11
{
GdkKeymap parent_instance;
gint min_keycode;
gint max_keycode;
KeySym* keymap;
gint keysyms_per_keycode;
XModifierKeymap* mod_keymap;
guint lock_keysym;
GdkModifierType group_switch_mask;
GdkModifierType num_lock_mask;
gboolean sun_keypad;
PangoDirection current_direction;
gboolean have_direction;
guint current_serial;
#ifdef HAVE_XKB
XkbDescPtr xkb_desc;
#endif
};
#define KEYMAP_USE_XKB(keymap) GDK_DISPLAY_X11 ((keymap)->display)->use_xkb
#define KEYMAP_XDISPLAY(keymap) GDK_DISPLAY_XDISPLAY ((keymap)->display)
static GType gdk_keymap_x11_get_type (void);
static void gdk_keymap_x11_init (GdkKeymapX11 *keymap);
static GType
gdk_keymap_x11_get_type (void)
{
static GType object_type = 0;
if (!object_type)
{
static const GTypeInfo object_info =
{
sizeof (GdkKeymapClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) NULL,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GdkKeymapX11),
0, /* n_preallocs */
(GInstanceInitFunc) gdk_keymap_x11_init,
};
object_type = g_type_register_static (GDK_TYPE_KEYMAP,
"GdkKeymapX11",
&object_info, 0);
}
return object_type;
}
static void
gdk_keymap_x11_init (GdkKeymapX11 *keymap)
{
keymap->min_keycode = 0;
keymap->max_keycode = 0;
keymap->keymap = NULL;
keymap->keysyms_per_keycode = 0;
keymap->mod_keymap = NULL;
keymap->num_lock_mask = 0;
keymap->sun_keypad = FALSE;
keymap->group_switch_mask = 0;
keymap->lock_keysym = GDK_Caps_Lock;
keymap->have_direction = FALSE;
#ifdef HAVE_XKB
keymap->xkb_desc = NULL;
#endif
keymap->current_serial = 0;
}
static inline void
update_keyrange (GdkKeymapX11 *keymap_x11)
{
if (keymap_x11->max_keycode == 0)
XDisplayKeycodes (KEYMAP_XDISPLAY (GDK_KEYMAP (keymap_x11)),
&keymap_x11->min_keycode, &keymap_x11->max_keycode);
}
#ifdef HAVE_XKB
static XkbDescPtr
get_xkb (GdkKeymapX11 *keymap_x11)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_KEYMAP (keymap_x11)->display);
Display *xdisplay = display_x11->xdisplay;
update_keyrange (keymap_x11);
if (keymap_x11->xkb_desc == NULL)
{
keymap_x11->xkb_desc = XkbGetMap (xdisplay, XkbKeySymsMask | XkbKeyTypesMask, XkbUseCoreKbd);
if (keymap_x11->xkb_desc == NULL)
g_error ("Failed to get keymap");
XkbGetNames (xdisplay, XkbGroupNamesMask, keymap_x11->xkb_desc);
}
else if (keymap_x11->current_serial != display_x11->keymap_serial)
{
XkbGetUpdatedMap (xdisplay, XkbKeySymsMask | XkbKeyTypesMask,
keymap_x11->xkb_desc);
XkbGetNames (xdisplay, XkbGroupNamesMask, keymap_x11->xkb_desc);
}
keymap_x11->current_serial = display_x11->keymap_serial;
return keymap_x11->xkb_desc;
}
#endif /* HAVE_XKB */
/* Whether we were able to turn on detectable-autorepeat using
* XkbSetDetectableAutorepeat. If FALSE, we'll fall back
* to checking the next event with XPending().
*/
/**
* gdk_keymap_get_for_display:
* @display: the #GdkDisplay.
* @returns: the #GdkKeymap attached to @display.
*
* Returns the #GdkKeymap attached to @display.
*
* Since: 2.2
**/
GdkKeymap*
gdk_keymap_get_for_display (GdkDisplay *display)
{
GdkDisplayX11 *display_x11;
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
display_x11 = GDK_DISPLAY_X11 (display);
if (!display_x11->keymap)
display_x11->keymap = g_object_new (gdk_keymap_x11_get_type (), NULL);
display_x11->keymap->display = display;
return display_x11->keymap;
}
/* Find the index of the group/level pair within the keysyms for a key.
* We round up the number of keysyms per keycode to the next even number,
* otherwise we lose a whole group of keys
*/
#define KEYSYM_INDEX(keymap_impl, group, level) \
(2 * ((group) % (int)((keymap_impl->keysyms_per_keycode + 1) / 2)) + (level))
#define KEYSYM_IS_KEYPAD(s) (((s) >= 0xff80 && (s) <= 0xffbd) || \
((s) >= 0x11000000 && (s) <= 0x1100ffff))
static int
get_symbol (const KeySym *syms, GdkKeymapX11 *keymap_x11, int group, int level)
{
int index;
index = KEYSYM_INDEX(keymap_x11, group, level);
if (index > keymap_x11->keysyms_per_keycode)
return NoSymbol;
return syms[index];
}
static void
update_keymaps (GdkKeymapX11 *keymap_x11)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_KEYMAP (keymap_x11)->display);
Display *xdisplay = display_x11->xdisplay;
#ifdef HAVE_XKB
g_assert (!KEYMAP_USE_XKB (GDK_KEYMAP (keymap_x11)));
#endif
if (keymap_x11->keymap == NULL ||
keymap_x11->current_serial != display_x11->keymap_serial)
{
gint i;
gint map_size;
gint keycode;
keymap_x11->current_serial = display_x11->keymap_serial;
update_keyrange (keymap_x11);
if (keymap_x11->keymap)
XFree (keymap_x11->keymap);
if (keymap_x11->mod_keymap)
XFreeModifiermap (keymap_x11->mod_keymap);
keymap_x11->keymap = XGetKeyboardMapping (xdisplay, keymap_x11->min_keycode,
keymap_x11->max_keycode - keymap_x11->min_keycode + 1,
&keymap_x11->keysyms_per_keycode);
/* GDK_ISO_Left_Tab, as usually configured through XKB, really messes
* up the whole idea of "consumed modifiers" because shift is consumed.
* However, <shift>Tab is not usually GDK_ISO_Left_Tab without XKB,
* we we fudge the map here.
*/
keycode = keymap_x11->min_keycode;
while (keycode <= keymap_x11->max_keycode)
{
KeySym *syms = keymap_x11->keymap + (keycode - keymap_x11->min_keycode) * keymap_x11->keysyms_per_keycode;
/* Check both groups */
for (i = 0 ; i < 2 ; i++)
{
if (get_symbol (syms, keymap_x11, i, 0) == GDK_Tab)
syms[KEYSYM_INDEX (keymap_x11, i, 1)] = GDK_ISO_Left_Tab;
}
/*
* If there is one keysym and the key symbol has upper and lower
* case variants fudge the keymap
*/
if (get_symbol (syms, keymap_x11, 0, 1) == 0)
{
guint lower;
guint upper;
gdk_keyval_convert_case (get_symbol (syms, keymap_x11, 0, 0), &lower, &upper);
if (lower != upper)
{
syms[KEYSYM_INDEX (keymap_x11, 0, 0)] = lower;
syms[KEYSYM_INDEX (keymap_x11, 0, 1)] = upper;
}
}
++keycode;
}
keymap_x11->mod_keymap = XGetModifierMapping (xdisplay);
keymap_x11->lock_keysym = GDK_VoidSymbol;
keymap_x11->group_switch_mask = 0;
keymap_x11->num_lock_mask = 0;
/* There are 8 sets of modifiers, with each set containing
* max_keypermod keycodes.
*/
map_size = 8 * keymap_x11->mod_keymap->max_keypermod;
for (i = 0; i < map_size; i++)
{
/* Get the key code at this point in the map. */
gint keycode = keymap_x11->mod_keymap->modifiermap[i];
gint j;
KeySym *syms;
guint mask;
/* Ignore invalid keycodes. */
if (keycode < keymap_x11->min_keycode ||
keycode > keymap_x11->max_keycode)
continue;
syms = keymap_x11->keymap + (keycode - keymap_x11->min_keycode) * keymap_x11->keysyms_per_keycode;
/* The fourth modifier, GDK_MOD1_MASK is 1 << 3.
* Each group of max_keypermod entries refers to the same modifier.
*/
mask = 1 << (i / keymap_x11->mod_keymap->max_keypermod);
switch (mask)
{
case GDK_LOCK_MASK:
/* Get the Lock keysym. If any keysym bound to the Lock modifier
* is Caps_Lock, we will interpret the modifier as Caps_Lock;
* otherwise, if any is bound to Shift_Lock, we will interpret
* the modifier as Shift_Lock. Otherwise, the lock modifier
* has no effect.
*/
for (j = 0; j < keymap_x11->keysyms_per_keycode; j++)
{
if (syms[j] == GDK_Caps_Lock)
keymap_x11->lock_keysym = GDK_Caps_Lock;
else if (syms[j] == GDK_Shift_Lock &&
keymap_x11->lock_keysym == GDK_VoidSymbol)
keymap_x11->lock_keysym = GDK_Shift_Lock;
}
break;
case GDK_CONTROL_MASK:
case GDK_SHIFT_MASK:
case GDK_MOD1_MASK:
/* Some keyboard maps are known to map Mode_Switch as an
* extra Mod1 key. In circumstances like that, it won't be
* used to switch groups.
*/
break;
default:
/* Find the Mode_Switch and Num_Lock modifiers. */
for (j = 0; j < keymap_x11->keysyms_per_keycode; j++)
{
if (syms[j] == GDK_Mode_switch)
{
/* This modifier swaps groups */
keymap_x11->group_switch_mask |= mask;
}
else if (syms[j] == GDK_Num_Lock)
{
/* This modifier is used for Num_Lock */
keymap_x11->num_lock_mask |= mask;
}
}
break;
}
}
/* Hack: The Sun X server puts the keysym to use when the Num Lock
* modifier is on in the third element of the keysym array, instead
* of the second.
*/
if ((strcmp (ServerVendor (xdisplay), "Sun Microsystems, Inc.") == 0) &&
(keymap_x11->keysyms_per_keycode > 2))
keymap_x11->sun_keypad = TRUE;
else
keymap_x11->sun_keypad = FALSE;
}
}
static const KeySym*
get_keymap (GdkKeymapX11 *keymap_x11)
{
update_keymaps (keymap_x11);
return keymap_x11->keymap;
}
#define GET_EFFECTIVE_KEYMAP(keymap) get_effective_keymap ((keymap), G_STRFUNC)
static GdkKeymap *
get_effective_keymap (GdkKeymap *keymap,
const char *function)
{
if (!keymap)
{
GDK_NOTE (MULTIHEAD,
g_message ("reverting to default display keymap in %s",
function));
return gdk_keymap_get_default ();
}
return keymap;
}
#if HAVE_XKB
static PangoDirection
get_direction (GdkKeymapX11 *keymap_x11)
{
XkbDescRec *xkb = get_xkb (keymap_x11);
const char *name;
XkbStateRec state_rec;
PangoDirection result;
GdkDisplay *display = GDK_KEYMAP (keymap_x11)->display;
XkbGetState (GDK_DISPLAY_XDISPLAY (display), XkbUseCoreKbd, &state_rec);
if (xkb->names->groups[state_rec.locked_group] == None)
result = PANGO_DIRECTION_LTR;
else
{
name = gdk_x11_get_xatom_name_for_display (display, xkb->names->groups[state_rec.locked_group]);
if (g_ascii_strcasecmp (name, "arabic") == 0 ||
g_ascii_strcasecmp (name, "hebrew") == 0 ||
g_ascii_strcasecmp (name, "israelian") == 0)
result = PANGO_DIRECTION_RTL;
else
result = PANGO_DIRECTION_LTR;
}
return result;
}
void
_gdk_keymap_state_changed (GdkDisplay *display)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
if (display_x11->keymap)
{
GdkKeymapX11 *keymap_x11 = GDK_KEYMAP_X11 (display_x11->keymap);
PangoDirection new_direction = get_direction (keymap_x11);
if (!keymap_x11->have_direction || new_direction != keymap_x11->current_direction)
{
keymap_x11->have_direction = TRUE;
keymap_x11->current_direction = new_direction;
g_signal_emit_by_name (keymap_x11, "direction_changed");
}
}
}
#endif /* HAVE_XKB */
void
_gdk_keymap_keys_changed (GdkDisplay *display)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
++display_x11->keymap_serial;
if (display_x11->keymap)
g_signal_emit_by_name (display_x11->keymap, "keys_changed", 0);
}
PangoDirection
gdk_keymap_get_direction (GdkKeymap *keymap)
{
keymap = GET_EFFECTIVE_KEYMAP (keymap);
#if HAVE_XKB
if (KEYMAP_USE_XKB (keymap))
{
GdkKeymapX11 *keymap_x11 = GDK_KEYMAP_X11 (keymap);
if (!keymap_x11->have_direction)
{
keymap_x11->current_direction = get_direction (keymap_x11);
keymap_x11->have_direction = TRUE;
}
return keymap_x11->current_direction;
}
else
#endif /* HAVE_XKB */
return PANGO_DIRECTION_LTR;
}
/**
* gdk_keymap_get_entries_for_keyval:
* @keymap: a #GdkKeymap, or %NULL to use the default keymap
* @keyval: a keyval, such as %GDK_a, %GDK_Up, %GDK_Return, etc.
* @keys: return location for an array of #GdkKeymapKey
* @n_keys: return location for number of elements in returned array
*
* Obtains a list of keycode/group/level combinations that will
* generate @keyval. Groups and levels are two kinds of keyboard mode;
* in general, the level determines whether the top or bottom symbol
* on a key is used, and the group determines whether the left or
* right symbol is used. On US keyboards, the shift key changes the
* keyboard level, and there are no groups. A group switch key might
* convert a keyboard between Hebrew to English modes, for example.
* #GdkEventKey contains a %group field that indicates the active
* keyboard group. The level is computed from the modifier mask.
* The returned array should be freed
* with g_free().
*
* Return value: %TRUE if keys were found and returned
**/
gboolean
gdk_keymap_get_entries_for_keyval (GdkKeymap *keymap,
guint keyval,
GdkKeymapKey **keys,
gint *n_keys)
{
GArray *retval;
GdkKeymapX11 *keymap_x11;
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);
keymap = GET_EFFECTIVE_KEYMAP (keymap);
keymap_x11 = GDK_KEYMAP_X11 (keymap);
retval = g_array_new (FALSE, FALSE, sizeof (GdkKeymapKey));
#ifdef HAVE_XKB
if (KEYMAP_USE_XKB (keymap))
{
/* See sec 15.3.4 in XKB docs */
XkbDescRec *xkb = get_xkb (keymap_x11);
gint keycode;
keycode = keymap_x11->min_keycode;
while (keycode <= keymap_x11->max_keycode)
{
gint max_shift_levels = XkbKeyGroupsWidth (xkb, keycode); /* "key width" */
gint group = 0;
gint level = 0;
gint total_syms = XkbKeyNumSyms (xkb, keycode);
gint 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)
{
/* check out our cool loop invariant */
g_assert (i == (group * max_shift_levels + level));
if (entry[i] == keyval)
{
/* Found a match */
GdkKeymapKey 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;
}
}
else
#endif
{
const KeySym *map = get_keymap (keymap_x11);
gint keycode;
keycode = keymap_x11->min_keycode;
while (keycode <= keymap_x11->max_keycode)
{
const KeySym *syms = map + (keycode - keymap_x11->min_keycode) * keymap_x11->keysyms_per_keycode;
gint i = 0;
while (i < keymap_x11->keysyms_per_keycode)
{
if (syms[i] == keyval)
{
/* found a match */
GdkKeymapKey key;
key.keycode = keycode;
/* The "classic" non-XKB keymap has 2 levels per group */
key.group = i / 2;
key.level = i % 2;
g_array_append_val (retval, key);
}
++i;
}
++keycode;
}
}
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;
}
/**
* gdk_keymap_get_entries_for_keycode:
* @keymap: a #GdkKeymap or %NULL to use the default keymap
* @hardware_keycode: a keycode
* @keys: return location for array of #GdkKeymapKey, or NULL
* @keyvals: return location for array of keyvals, or NULL
* @n_entries: length of @keys and @keyvals
*
* Returns the keyvals bound to @hardware_keycode.
* The Nth #GdkKeymapKey in @keys is bound to the Nth
* keyval in @keyvals. Free the returned arrays with g_free().
* When a keycode is pressed by the user, the keyval from
* this list of entries is selected by considering the effective
* keyboard group and level. See gdk_keymap_translate_keyboard_state().
*
* Returns: %TRUE if there were any entries
**/
gboolean
gdk_keymap_get_entries_for_keycode (GdkKeymap *keymap,
guint hardware_keycode,
GdkKeymapKey **keys,
guint **keyvals,
gint *n_entries)
{
GdkKeymapX11 *keymap_x11;
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);
keymap = GET_EFFECTIVE_KEYMAP (keymap);
keymap_x11 = GDK_KEYMAP_X11 (keymap);
update_keyrange (keymap_x11);
if (hardware_keycode < keymap_x11->min_keycode ||
hardware_keycode > keymap_x11->max_keycode)
{
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;
#ifdef HAVE_XKB
if (KEYMAP_USE_XKB (keymap))
{
/* See sec 15.3.4 in XKB docs */
XkbDescRec *xkb = get_xkb (keymap_x11);
gint max_shift_levels;
gint group = 0;
gint level = 0;
gint total_syms;
gint i = 0;
KeySym *entry;
max_shift_levels = XkbKeyGroupsWidth (xkb, hardware_keycode); /* "key width" */
total_syms = XkbKeyNumSyms (xkb, hardware_keycode);
/* 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, hardware_keycode);
while (i < total_syms)
{
/* check out our cool loop invariant */
g_assert (i == (group * max_shift_levels + level));
if (key_array)
{
GdkKeymapKey key;
key.keycode = hardware_keycode;
key.group = group;
key.level = level;
g_array_append_val (key_array, key);
}
if (keyval_array)
g_array_append_val (keyval_array, entry[i]);
++level;
if (level == max_shift_levels)
{
level = 0;
++group;
}
++i;
}
}
else
#endif
{
const KeySym *map = get_keymap (keymap_x11);
const KeySym *syms;
gint i = 0;
syms = map + (hardware_keycode - keymap_x11->min_keycode) * keymap_x11->keysyms_per_keycode;
while (i < keymap_x11->keysyms_per_keycode)
{
if (key_array)
{
GdkKeymapKey key;
key.keycode = hardware_keycode;
/* The "classic" non-XKB keymap has 2 levels per group */
key.group = i / 2;
key.level = i % 2;
g_array_append_val (key_array, key);
}
if (keyval_array)
g_array_append_val (keyval_array, syms[i]);
++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;
}
/**
* gdk_keymap_lookup_key:
* @keymap: a #GdkKeymap or %NULL to use the default keymap
* @key: a #GdkKeymapKey with keycode, group, and level initialized
*
* Looks up the keyval mapped to a keycode/group/level triplet.
* If no keyval is bound to @key, returns 0. For normal user input,
* you want to use gdk_keymap_translate_keyboard_state() instead of
* this function, since the effective group/level may not be
* the same as the current keyboard state.
*
* Return value: a keyval, or 0 if none was mapped to the given @key
**/
guint
gdk_keymap_lookup_key (GdkKeymap *keymap,
const GdkKeymapKey *key)
{
GdkKeymapX11 *keymap_x11;
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);
keymap = GET_EFFECTIVE_KEYMAP (keymap);
keymap_x11 = GDK_KEYMAP_X11 (keymap);
#ifdef HAVE_XKB
if (KEYMAP_USE_XKB (keymap))
{
XkbDescRec *xkb = get_xkb (keymap_x11);
return XkbKeySymEntry (xkb, key->keycode, key->level, key->group);
}
else
#endif
{
const KeySym *map = get_keymap (keymap_x11);
const KeySym *syms = map + (key->keycode - keymap_x11->min_keycode) * keymap_x11->keysyms_per_keycode;
return get_symbol (syms, keymap_x11, key->group, key->level);
}
}
#ifdef HAVE_XKB
/* This is copied straight from XFree86 Xlib, to:
* - add the group and level return.
* - change the interpretation of mods_rtrn as described
* in the docs for gdk_keymap_translate_keyboard_state()
* It's unchanged for ease of diff against the Xlib sources; don't
* reformat it.
*/
static Bool
MyEnhancedXkbTranslateKeyCode(register XkbDescPtr xkb,
KeyCode key,
register unsigned int mods,
unsigned int * mods_rtrn,
KeySym * keysym_rtrn,
unsigned int * group_rtrn,
unsigned int * level_rtrn)
{
XkbKeyTypeRec *type;
int col,nKeyGroups;
unsigned preserve,effectiveGroup;
KeySym *syms;
if (mods_rtrn!=NULL)
*mods_rtrn = 0;
nKeyGroups= XkbKeyNumGroups(xkb,key);
if ((!XkbKeycodeInRange(xkb,key))||(nKeyGroups==0)) {
if (keysym_rtrn!=NULL)
*keysym_rtrn = NoSymbol;
return False;
}
syms = XkbKeySymsPtr(xkb,key);
/* find the offset of the effective group */
col = 0;
effectiveGroup= XkbGroupForCoreState(mods);
if ( effectiveGroup>=nKeyGroups ) {
unsigned groupInfo= XkbKeyGroupInfo(xkb,key);
switch (XkbOutOfRangeGroupAction(groupInfo)) {
default:
effectiveGroup %= nKeyGroups;
break;
case XkbClampIntoRange:
effectiveGroup = nKeyGroups-1;
break;
case XkbRedirectIntoRange:
effectiveGroup = XkbOutOfRangeGroupNumber(groupInfo);
if (effectiveGroup>=nKeyGroups)
effectiveGroup= 0;
break;
}
}
col= effectiveGroup*XkbKeyGroupsWidth(xkb,key);
type = XkbKeyKeyType(xkb,key,effectiveGroup);
preserve= 0;
if (type->map) { /* find the column (shift level) within the group */
register int i;
register XkbKTMapEntryPtr entry;
/* ---- Begin section modified for GDK ---- */
int found = 0;
for (i=0,entry=type->map;i<type->map_count;i++,entry++) {
if (mods_rtrn) {
int bits = 0;
unsigned long tmp = entry->mods.mask;
while (tmp) {
if ((tmp & 1) == 1)
bits++;
tmp >>= 1;
}
/* We always add one-modifiers levels to mods_rtrn since
* they can't wipe out bits in the state unless the
* level would be triggered. But return other modifiers
*
*/
if (bits == 1 || (mods&type->mods.mask)==entry->mods.mask)
*mods_rtrn |= entry->mods.mask;
}
if (!found&&entry->active&&((mods&type->mods.mask)==entry->mods.mask)) {
col+= entry->level;
if (type->preserve)
preserve= type->preserve[i].mask;
if (level_rtrn)
*level_rtrn = entry->level;
found = 1;
}
}
/* ---- End section modified for GDK ---- */
}
if (keysym_rtrn!=NULL)
*keysym_rtrn= syms[col];
if (mods_rtrn) {
/* ---- Begin section modified for GDK ---- */
*mods_rtrn &= ~preserve;
/* ---- End section modified for GDK ---- */
/* ---- Begin stuff GDK comments out of the original Xlib version ---- */
/* This is commented out because xkb_info is a private struct */
#if 0
/* The Motif VTS doesn't get the help callback called if help
* is bound to Shift+<whatever>, and it appears as though it
* is XkbTranslateKeyCode that is causing the problem. The
* core X version of XTranslateKey always OR's in ShiftMask
* and LockMask for mods_rtrn, so this "fix" keeps this behavior
* and solves the VTS problem.
*/
if ((xkb->dpy)&&(xkb->dpy->xkb_info)&&
(xkb->dpy->xkb_info->xlib_ctrls&XkbLC_AlwaysConsumeShiftAndLock)) { *mods_rtrn|= (ShiftMask|LockMask);
}
#endif
/* ---- End stuff GDK comments out of the original Xlib version ---- */
}
/* ---- Begin stuff GDK adds to the original Xlib version ---- */
if (group_rtrn)
*group_rtrn = effectiveGroup;
/* ---- End stuff GDK adds to the original Xlib version ---- */
return (syms[col]!=NoSymbol);
}
#endif /* HAVE_XKB */
/* Translates from keycode/state to keysymbol using the traditional interpretation
* of the keyboard map. See section 12.7 of the Xlib reference manual
*/
static guint
translate_keysym (GdkKeymapX11 *keymap_x11,
guint hardware_keycode,
gint group,
GdkModifierType state,
guint *effective_group,
guint *effective_level)
{
const KeySym *map = get_keymap (keymap_x11);
const KeySym *syms = map + (hardware_keycode - keymap_x11->min_keycode) * keymap_x11->keysyms_per_keycode;
#define SYM(k,g,l) get_symbol (syms, k,g,l)
GdkModifierType shift_modifiers;
gint shift_level;
guint tmp_keyval;
gint num_lock_index;
shift_modifiers = GDK_SHIFT_MASK;
if (keymap_x11->lock_keysym == GDK_Shift_Lock)
shift_modifiers |= GDK_LOCK_MASK;
/* Fall back to the first group if the passed in group is empty
*/
if (!(SYM (keymap_x11, group, 0) || SYM (keymap_x11, group, 1)) &&
(SYM (keymap_x11, 0, 0) || SYM (keymap_x11, 0, 1)))
group = 0;
/* Hack: On Sun, the Num Lock modifier uses the third element in the
* keysym array, and Mode_Switch does not apply for a keypad key.
*/
if (keymap_x11->sun_keypad)
{
num_lock_index = 2;
if (group != 0)
{
gint i;
for (i = 0; i < keymap_x11->keysyms_per_keycode; i++)
if (KEYSYM_IS_KEYPAD (SYM (keymap_x11, 0, i)))
group = 0;
}
}
else
num_lock_index = 1;
if ((state & keymap_x11->num_lock_mask) &&
KEYSYM_IS_KEYPAD (SYM (keymap_x11, group, num_lock_index)))
{
/* Shift, Shift_Lock cancel Num_Lock
*/
shift_level = (state & shift_modifiers) ? 0 : num_lock_index;
if (!SYM (keymap_x11, group, shift_level) && SYM (keymap_x11, group, 0))
shift_level = 0;
tmp_keyval = SYM (keymap_x11, group, shift_level);
}
else
{
/* Fall back to the the first level if no symbol for the level
* we were passed.
*/
shift_level = (state & shift_modifiers) ? 1 : 0;
if (!SYM (keymap_x11, group, shift_level) && SYM (keymap_x11, group, 0))
shift_level = 0;
tmp_keyval = SYM (keymap_x11, group, shift_level);
if (keymap_x11->lock_keysym == GDK_Caps_Lock && (state & GDK_LOCK_MASK) != 0)
{
guint upper = gdk_keyval_to_upper (tmp_keyval);
if (upper != tmp_keyval)
tmp_keyval = upper;
}
}
if (effective_group)
*effective_group = group;
if (effective_level)
*effective_level = shift_level;
return tmp_keyval;
#undef SYM
}
/**
* gdk_keymap_translate_keyboard_state:
* @keymap: a #GdkKeymap, or %NULL to use the default
* @hardware_keycode: a keycode
* @state: a modifier state
* @group: active keyboard group
* @keyval: return location for keyval
* @effective_group: return location for effective group
* @level: return location for level
* @consumed_modifiers: return location for modifiers that were used to determine the group or level
*
*
* Translates the contents of a #GdkEventKey into a keyval, effective
* group, and level. Modifiers that affected the translation and
* are thus unavailable for application use are returned in
* @consumed_modifiers. See gdk_keyval_get_keys() for an explanation of
* groups and levels. The @effective_group is the group that was
* actually used for the translation; some keys such as Enter are not
* affected by the active keyboard group. The @level is derived from
* @state. For convenience, #GdkEventKey already contains the translated
* keyval, so this function isn't as useful as you might think.
*
* <note><para>
* @consumed_modifiers gives modifiers that should be masked out
* from @state when comparing this key press to a hot key. For
* instance, on a US keyboard, the <literal>plus</literal>
* symbol is shifted, so when comparing a key press to a
* <literal>&lt;Control&gt;plus</literal> accelerator &lt;Shift&gt; should
* be masked out.
* </para>
* <informalexample><programlisting>
* &sol;* We want to ignore irrelevant modifiers like ScrollLock *&sol;
* &num;define ALL_ACCELS_MASK (GDK_CONTROL_MASK | GDK_SHIFT_MASK | GDK_MOD1_MASK)
* gdk_keymap_translate_keyboard_state (keymap, event->hardware_keycode,
* event->state, event->group,
* &amp;keyval, NULL, NULL, &amp;consumed);
* if (keyval == GDK_PLUS &&
* (event->state &amp; ~consumed &amp; ALL_ACCELS_MASK) == GDK_CONTROL_MASK)
* &sol;* Control was pressed *&sol;
* </programlisting></informalexample>
* <para>
* An older interpretation @consumed_modifiers was that it contained
* all modifiers that might affect the translation of the key;
* this allowed accelerators to be stored with irrelevant consumed
* modifiers, by doing:</para>
* <informalexample><programlisting>
* &sol;* XXX Don't do this XXX *&sol;
* if (keyval == accel_keyval &&
* (event->state &amp; ~consumed &amp; ALL_ACCELS_MASK) == (accel_mods &amp; ~consumed))
* &sol;* Accelerator was pressed *&sol;
* </programlisting></informalexample>
* <para>
* However, this did not work if multi-modifier combinations were
* used in the keymap, since, for instance, <literal>&lt;Control&gt;</literal>
* would be masked out even if only <literal>&lt;Control&gt;&lt;Alt&gt;</literal>
* was used in the keymap. To support this usage as well as well as
* possible, all <emphasis>single modifier</emphasis> combinations
* that could affect the key for any combination of modifiers will
* be returned in @consumed_modifiers; multi-modifier combinations
* are returned only when actually found in @state. When you store
* accelerators, you should always store them with consumed modifiers
* removed. Store <literal>&lt;Control&gt;plus</literal>,
* not <literal>&lt;Control&gt;&lt;Shift&gt;plus</literal>,
* </para></note>
*
* Return value: %TRUE if there was a keyval bound to the keycode/state/group
**/
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)
{
GdkKeymapX11 *keymap_x11;
KeySym tmp_keyval = NoSymbol;
guint tmp_modifiers;
g_return_val_if_fail (keymap == NULL || GDK_IS_KEYMAP (keymap), FALSE);
g_return_val_if_fail (group < 4, FALSE);
keymap = GET_EFFECTIVE_KEYMAP (keymap);
keymap_x11 = GDK_KEYMAP_X11 (keymap);
if (keyval)
*keyval = NoSymbol;
if (effective_group)
*effective_group = 0;
if (level)
*level = 0;
if (consumed_modifiers)
*consumed_modifiers = 0;
update_keyrange (keymap_x11);
if (hardware_keycode < keymap_x11->min_keycode ||
hardware_keycode > keymap_x11->max_keycode)
return FALSE;
#ifdef HAVE_XKB
if (KEYMAP_USE_XKB (keymap))
{
XkbDescRec *xkb = get_xkb (keymap_x11);
/* replace bits 13 and 14 with the provided group */
state &= ~(1 << 13 | 1 << 14);
state |= group << 13;
MyEnhancedXkbTranslateKeyCode (xkb,
hardware_keycode,
state,
&tmp_modifiers,
&tmp_keyval,
effective_group,
level);
if (state & ~tmp_modifiers & LockMask)
tmp_keyval = gdk_keyval_to_upper (tmp_keyval);
/* We need to augment the consumed modifiers with LockMask, since
* we handle that ourselves, and also with the group bits
*/
tmp_modifiers |= LockMask | 1 << 13 | 1 << 14;
}
else
#endif
{
GdkModifierType bit;
tmp_modifiers = 0;
/* We see what modifiers matter by trying the translation with
* and without each possible modifier
*/
for (bit = GDK_SHIFT_MASK; bit < GDK_BUTTON1_MASK; bit <<= 1)
{
/* Handling of the group here is a bit funky; a traditional
* X keyboard map can have more than two groups, but no way
* of accessing the extra groups is defined. We allow a
* caller to pass in any group to this function, but we
* only can represent switching between group 0 and 1 in
* consumed modifiers.
*/
if (translate_keysym (keymap_x11, hardware_keycode,
(bit == keymap_x11->group_switch_mask) ? 0 : group,
state & ~bit,
NULL, NULL) !=
translate_keysym (keymap_x11, hardware_keycode,
(bit == keymap_x11->group_switch_mask) ? 1 : group,
state | bit,
NULL, NULL))
tmp_modifiers |= bit;
}
tmp_keyval = translate_keysym (keymap_x11, hardware_keycode,
group, state,
level, effective_group);
}
if (consumed_modifiers)
*consumed_modifiers = tmp_modifiers;
if (keyval)
*keyval = tmp_keyval;
return tmp_keyval != NoSymbol;
}
/* Key handling not part of the keymap */
gchar*
gdk_keyval_name (guint keyval)
{
switch (keyval)
{
case GDK_Page_Up:
return "Page_Up";
case GDK_Page_Down:
return "Page_Down";
case GDK_KP_Page_Up:
return "KP_Page_Up";
case GDK_KP_Page_Down:
return "KP_Page_Down";
}
return XKeysymToString (keyval);
}
guint
gdk_keyval_from_name (const gchar *keyval_name)
{
g_return_val_if_fail (keyval_name != NULL, 0);
return XStringToKeysym (keyval_name);
}
#ifdef HAVE_XCONVERTCASE
void
gdk_keyval_convert_case (guint symbol,
guint *lower,
guint *upper)
{
KeySym xlower = 0;
KeySym xupper = 0;
/* Check for directly encoded 24-bit UCS characters: */
if ((symbol & 0xff000000) == 0x01000000)
{
if (lower)
*lower = gdk_unicode_to_keyval (g_unichar_tolower (symbol & 0x00ffffff));
if (upper)
*upper = gdk_unicode_to_keyval (g_unichar_toupper (symbol & 0x00ffffff));
return;
}
if (symbol)
XConvertCase (symbol, &xlower, &xupper);
if (lower)
*lower = xlower;
if (upper)
*upper = xupper;
}
#endif /* HAVE_XCONVERTCASE */
gint
_gdk_x11_get_group_for_state (GdkDisplay *display,
GdkModifierType state)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
#ifdef HAVE_XKB
if (display_x11->use_xkb)
{
return XkbGroupForCoreState (state);
}
else
#endif
{
GdkKeymapX11 *keymap_impl = GDK_KEYMAP_X11 (gdk_keymap_get_for_display (display));
update_keymaps (keymap_impl);
return (state & keymap_impl->group_switch_mask) ? 1 : 0;
}
}
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