/
gdkkeys-x11.c
1595 lines (1331 loc) · 45.8 KB
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gdkkeys-x11.c
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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, see <http://www.gnu.org/licenses/>.
*/
/*
* 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 "gdkx11keys.h"
#include "gdkkeysprivate.h"
#include "gdkkeysyms.h"
#include "gdkprivate-x11.h"
#include "gdkdisplay-x11.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <errno.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 _DirectionCacheEntry DirectionCacheEntry;
struct _DirectionCacheEntry
{
guint serial;
Atom group_atom;
PangoDirection direction;
};
struct _GdkX11Keymap
{
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;
GdkModifierType scroll_lock_mask;
GdkModifierType modmap[8];
PangoDirection current_direction;
guint have_direction : 1;
guint have_lock_state : 1;
guint caps_lock_state : 1;
guint num_lock_state : 1;
guint scroll_lock_state : 1;
guint modifier_state;
guint current_serial;
#ifdef HAVE_XKB
XkbDescPtr xkb_desc;
/* We cache the directions */
Atom current_group_atom;
guint current_cache_serial;
/* A cache of size four should be more than enough, people usually
* have two groups around, and the xkb limit is four. It still
* works correct for more than four groups. It's just the
* cache.
*/
DirectionCacheEntry group_direction_cache[4];
#endif
};
struct _GdkX11KeymapClass
{
GdkKeymapClass parent_class;
};
#define KEYMAP_USE_XKB(keymap) GDK_X11_DISPLAY ((keymap)->display)->use_xkb
#define KEYMAP_XDISPLAY(keymap) GDK_DISPLAY_XDISPLAY ((keymap)->display)
G_DEFINE_TYPE (GdkX11Keymap, gdk_x11_keymap, GDK_TYPE_KEYMAP)
static void
gdk_x11_keymap_init (GdkX11Keymap *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->scroll_lock_mask = 0;
keymap->group_switch_mask = 0;
keymap->lock_keysym = GDK_KEY_Caps_Lock;
keymap->have_direction = FALSE;
keymap->have_lock_state = FALSE;
keymap->current_serial = 0;
#ifdef HAVE_XKB
keymap->xkb_desc = NULL;
keymap->current_group_atom = 0;
keymap->current_cache_serial = 0;
#endif
}
static void
gdk_x11_keymap_finalize (GObject *object)
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (object);
if (keymap_x11->keymap)
XFree (keymap_x11->keymap);
if (keymap_x11->mod_keymap)
XFreeModifiermap (keymap_x11->mod_keymap);
#ifdef HAVE_XKB
if (keymap_x11->xkb_desc)
XkbFreeKeyboard (keymap_x11->xkb_desc, XkbAllComponentsMask, True);
#endif
G_OBJECT_CLASS (gdk_x11_keymap_parent_class)->finalize (object);
}
static inline void
update_keyrange (GdkX11Keymap *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 void
update_modmap (Display *display,
GdkX11Keymap *keymap_x11)
{
static struct {
const gchar *name;
Atom atom;
GdkModifierType mask;
} vmods[] = {
{ "Meta", 0, GDK_META_MASK },
{ "Super", 0, GDK_SUPER_MASK },
{ "Hyper", 0, GDK_HYPER_MASK },
{ NULL, 0, 0 }
};
gint i, j, k;
if (!vmods[0].atom)
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 (GdkX11Keymap *keymap_x11)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (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 | XkbModifierMapMask | XkbVirtualModsMask, XkbUseCoreKbd);
if (keymap_x11->xkb_desc == NULL)
{
g_error ("Failed to get keymap");
return NULL;
}
XkbGetNames (xdisplay, XkbGroupNamesMask | XkbVirtualModNamesMask, keymap_x11->xkb_desc);
update_modmap (xdisplay, keymap_x11);
}
else if (keymap_x11->current_serial != display_x11->keymap_serial)
{
XkbGetUpdatedMap (xdisplay, XkbKeySymsMask | XkbKeyTypesMask | XkbModifierMapMask | XkbVirtualModsMask,
keymap_x11->xkb_desc);
XkbGetNames (xdisplay, XkbGroupNamesMask | XkbVirtualModNamesMask, keymap_x11->xkb_desc);
update_modmap (xdisplay, keymap_x11);
}
keymap_x11->current_serial = display_x11->keymap_serial;
if (keymap_x11->num_lock_mask == 0)
keymap_x11->num_lock_mask = XkbKeysymToModifiers (KEYMAP_XDISPLAY (GDK_KEYMAP (keymap_x11)), GDK_KEY_Num_Lock);
if (keymap_x11->scroll_lock_mask == 0)
keymap_x11->scroll_lock_mask = XkbKeysymToModifiers (KEYMAP_XDISPLAY (GDK_KEYMAP (keymap_x11)), GDK_KEY_Scroll_Lock);
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().
*/
/* 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) % (gint)((keymap_impl->keysyms_per_keycode + 1) / 2)) + (level))
#define KEYSYM_IS_KEYPAD(s) (((s) >= 0xff80 && (s) <= 0xffbd) || \
((s) >= 0x11000000 && (s) <= 0x1100ffff))
static gint
get_symbol (const KeySym *syms,
GdkX11Keymap *keymap_x11,
gint group,
gint level)
{
gint index;
index = KEYSYM_INDEX(keymap_x11, group, level);
if (index >= keymap_x11->keysyms_per_keycode)
return NoSymbol;
return syms[index];
}
static void
set_symbol (KeySym *syms,
GdkX11Keymap *keymap_x11,
gint group,
gint level,
KeySym sym)
{
gint index;
index = KEYSYM_INDEX(keymap_x11, group, level);
if (index >= keymap_x11->keysyms_per_keycode)
return;
syms[index] = sym;
}
static void
update_keymaps (GdkX11Keymap *keymap_x11)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (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_KEY_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_KEY_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_KEY_Tab)
set_symbol (syms, keymap_x11, i, 1, GDK_KEY_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)
{
set_symbol (syms, keymap_x11, 0, 0, lower);
set_symbol (syms, keymap_x11, 0, 1, upper);
}
}
++keycode;
}
keymap_x11->mod_keymap = XGetModifierMapping (xdisplay);
keymap_x11->lock_keysym = GDK_KEY_VoidSymbol;
keymap_x11->group_switch_mask = 0;
keymap_x11->num_lock_mask = 0;
keymap_x11->scroll_lock_mask = 0;
for (i = 0; i < 8; i++)
keymap_x11->modmap[i] = 1 << i;
/* 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 code = keymap_x11->mod_keymap->modifiermap[i];
gint j;
KeySym *syms;
guint mask;
/* Ignore invalid keycodes. */
if (code < keymap_x11->min_keycode ||
code > keymap_x11->max_keycode)
continue;
syms = keymap_x11->keymap + (code - keymap_x11->min_keycode) * keymap_x11->keysyms_per_keycode;
mask = 0;
for (j = 0; j < keymap_x11->keysyms_per_keycode; j++)
{
if (syms[j] == GDK_KEY_Meta_L ||
syms[j] == GDK_KEY_Meta_R)
mask |= GDK_META_MASK;
else if (syms[j] == GDK_KEY_Hyper_L ||
syms[j] == GDK_KEY_Hyper_R)
mask |= GDK_HYPER_MASK;
else if (syms[j] == GDK_KEY_Super_L ||
syms[j] == GDK_KEY_Super_R)
mask |= GDK_SUPER_MASK;
}
keymap_x11->modmap[i / keymap_x11->mod_keymap->max_keypermod] |= mask;
/* 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_KEY_Caps_Lock)
keymap_x11->lock_keysym = GDK_KEY_Caps_Lock;
else if (syms[j] == GDK_KEY_Shift_Lock &&
keymap_x11->lock_keysym == GDK_KEY_VoidSymbol)
keymap_x11->lock_keysym = GDK_KEY_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, Num_Lock and Scroll_Lock modifiers. */
for (j = 0; j < keymap_x11->keysyms_per_keycode; j++)
{
if (syms[j] == GDK_KEY_Mode_switch)
{
/* This modifier swaps groups */
keymap_x11->group_switch_mask |= mask;
}
else if (syms[j] == GDK_KEY_Num_Lock)
{
/* This modifier is used for Num_Lock */
keymap_x11->num_lock_mask |= mask;
}
else if (syms[j] == GDK_KEY_Scroll_Lock)
{
/* This modifier is used for Scroll_Lock */
keymap_x11->scroll_lock_mask |= mask;
}
}
break;
}
}
}
}
static const KeySym*
get_keymap (GdkX11Keymap *keymap_x11)
{
update_keymaps (keymap_x11);
return keymap_x11->keymap;
}
#ifdef HAVE_XKB
static PangoDirection
get_direction (XkbDescRec *xkb,
gint group)
{
gint code;
gint rtl_minus_ltr = 0; /* total number of RTL keysyms minus LTR ones */
for (code = xkb->min_key_code; code <= xkb->max_key_code; code++)
{
gint level = 0;
KeySym sym = XkbKeySymEntry (xkb, code, level, group);
PangoDirection dir = pango_unichar_direction (gdk_keyval_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;
else
return PANGO_DIRECTION_LTR;
}
static PangoDirection
get_direction_from_cache (GdkX11Keymap *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 gboolean
update_direction (GdkX11Keymap *keymap_x11,
gint group)
{
XkbDescPtr xkb = get_xkb (keymap_x11);
Atom group_atom;
gboolean had_direction;
PangoDirection old_direction;
had_direction = keymap_x11->have_direction;
old_direction = keymap_x11->current_direction;
group_atom = xkb->names->groups[group];
/* a group change? */
if (!keymap_x11->have_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->have_direction = TRUE;
}
return !had_direction || old_direction != keymap_x11->current_direction;
}
static gboolean
update_lock_state (GdkX11Keymap *keymap_x11,
gint locked_mods,
gint effective_mods)
{
XkbDescPtr xkb G_GNUC_UNUSED;
gboolean have_lock_state;
gboolean caps_lock_state;
gboolean num_lock_state;
gboolean scroll_lock_state;
guint modifier_state;
/* ensure keymap_x11->num_lock_mask is initialized */
xkb = get_xkb (keymap_x11);
have_lock_state = keymap_x11->have_lock_state;
caps_lock_state = keymap_x11->caps_lock_state;
num_lock_state = keymap_x11->num_lock_state;
scroll_lock_state = keymap_x11->scroll_lock_state;
modifier_state = keymap_x11->modifier_state;
keymap_x11->have_lock_state = TRUE;
keymap_x11->caps_lock_state = (locked_mods & GDK_LOCK_MASK) != 0;
keymap_x11->num_lock_state = (locked_mods & keymap_x11->num_lock_mask) != 0;
keymap_x11->scroll_lock_state = (locked_mods & keymap_x11->scroll_lock_mask) != 0;
/* FIXME: sanitize this */
keymap_x11->modifier_state = (guint)effective_mods;
return !have_lock_state
|| (caps_lock_state != keymap_x11->caps_lock_state)
|| (num_lock_state != keymap_x11->num_lock_state)
|| (scroll_lock_state != keymap_x11->scroll_lock_state)
|| (modifier_state != keymap_x11->modifier_state);
}
/* keep this in sync with the XkbSelectEventDetails()
* call in gdk_display_open()
*/
void
_gdk_x11_keymap_state_changed (GdkDisplay *display,
XEvent *xevent)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
XkbEvent *xkb_event = (XkbEvent *)xevent;
if (display_x11->keymap)
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (display_x11->keymap);
if (update_direction (keymap_x11, XkbStateGroup (&xkb_event->state)))
g_signal_emit_by_name (keymap_x11, "direction-changed");
if (update_lock_state (keymap_x11,
xkb_event->state.locked_mods,
xkb_event->state.mods))
g_signal_emit_by_name (keymap_x11, "state-changed");
}
}
#endif /* HAVE_XKB */
static void
ensure_lock_state (GdkKeymap *keymap)
{
#ifdef HAVE_XKB
if (KEYMAP_USE_XKB (keymap))
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (keymap);
if (!keymap_x11->have_lock_state)
{
GdkDisplay *display = keymap->display;
XkbStateRec state_rec;
XkbGetState (GDK_DISPLAY_XDISPLAY (display), XkbUseCoreKbd, &state_rec);
update_lock_state (keymap_x11, state_rec.locked_mods, state_rec.mods);
}
}
#endif /* HAVE_XKB */
}
void
_gdk_x11_keymap_keys_changed (GdkDisplay *display)
{
GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);
++display_x11->keymap_serial;
if (display_x11->keymap)
g_signal_emit_by_name (display_x11->keymap, "keys_changed", 0);
}
static PangoDirection
gdk_x11_keymap_get_direction (GdkKeymap *keymap)
{
#ifdef HAVE_XKB
if (KEYMAP_USE_XKB (keymap))
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (keymap);
if (!keymap_x11->have_direction)
{
GdkDisplay *display = keymap->display;
XkbStateRec state_rec;
XkbGetState (GDK_DISPLAY_XDISPLAY (display), XkbUseCoreKbd,
&state_rec);
update_direction (keymap_x11, XkbStateGroup (&state_rec));
}
return keymap_x11->current_direction;
}
else
#endif /* HAVE_XKB */
return PANGO_DIRECTION_NEUTRAL;
}
static gboolean
gdk_x11_keymap_have_bidi_layouts (GdkKeymap *keymap)
{
#ifdef HAVE_XKB
if (KEYMAP_USE_XKB (keymap))
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (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;
}
static gboolean
gdk_x11_keymap_get_caps_lock_state (GdkKeymap *keymap)
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (keymap);
ensure_lock_state (keymap);
return keymap_x11->caps_lock_state;
}
static gboolean
gdk_x11_keymap_get_num_lock_state (GdkKeymap *keymap)
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (keymap);
ensure_lock_state (keymap);
return keymap_x11->num_lock_state;
}
static gboolean
gdk_x11_keymap_get_scroll_lock_state (GdkKeymap *keymap)
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (keymap);
ensure_lock_state (keymap);
return keymap_x11->scroll_lock_state;
}
static guint
gdk_x11_keymap_get_modifier_state (GdkKeymap *keymap)
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (keymap);
ensure_lock_state (keymap);
return keymap_x11->modifier_state;
}
static gboolean
gdk_x11_keymap_get_entries_for_keyval (GdkKeymap *keymap,
guint keyval,
GdkKeymapKey **keys,
gint *n_keys)
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (keymap);
GArray *retval;
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;
}
static gboolean
gdk_x11_keymap_get_entries_for_keycode (GdkKeymap *keymap,
guint hardware_keycode,
GdkKeymapKey **keys,
guint **keyvals,
gint *n_entries)
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (keymap);
GArray *key_array;
GArray *keyval_array;
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;