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7b6c68adc6
gtk/gdk/x11/gdkkeys-x11.c
Matthias Clasen e75310a445 Fix an out-of-bounds access in MyEnhancedXkbTranslateKeyCode 
Commits 314b6abbe8 and eb9223c008 were ignoring
the fact that the code where found is set to 1 was modifying
col - which was an ok thing to do when that part of the code
was still breaking out of the loop, but it is no longer doing
that (since 2003 !). Fix things up by storing the final col
value in a separate variable and using that after the loop.

https://bugzilla.gnome.org/show_bug.cgi?id=738886
2014-10-26 21:48:59 -04:00

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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, 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 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 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->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);
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;
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 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;
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 and Num_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;
}
}
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;
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;
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;
/* 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)
|| (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 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;
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;
}
}
*n_entries = 0;
if (keys)
{
*n_entries = key_array->len;
*keys = (GdkKeymapKey*) g_array_free (key_array, FALSE);
}
if (keyvals)
{
*n_entries = keyval_array->len;
*keyvals = (guint*) g_array_free (keyval_array, FALSE);
}
return *n_entries > 0;
}
static guint
gdk_x11_keymap_lookup_key (GdkKeymap *keymap,
const GdkKeymapKey *key)
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (keymap);
g_return_val_if_fail (key->group < 4, 0);
#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,
int * group_rtrn,
int * level_rtrn)
{
XkbKeyTypeRec *type;
int col,nKeyGroups;
unsigned preserve,effectiveGroup;
KeySym *syms;
int found_col = 0;
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;
}
}
found_col = 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 (!entry->active || syms[col+entry->level] == syms[col])
continue;
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 not if they don't change
* the symbol (otherwise we can't discriminate Shift-F10
* and F10 anymore). And don't add modifiers that are
* explicitly marked as preserved, either.
*/
if (bits == 1 ||
(mods&type->mods.mask) == entry->mods.mask)
{
if (type->preserve)
*mods_rtrn |= (entry->mods.mask & ~type->preserve[i].mask);
else
*mods_rtrn |= entry->mods.mask;
}
}
if (!found && ((mods&type->mods.mask) == entry->mods.mask)) {
found_col= 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[found_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[found_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 (GdkX11Keymap *keymap_x11,
guint hardware_keycode,
gint group,
GdkModifierType state,
gint *effective_group,
gint *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;
shift_modifiers = GDK_SHIFT_MASK;
if (keymap_x11->lock_keysym == GDK_KEY_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;
if ((state & keymap_x11->num_lock_mask) &&
KEYSYM_IS_KEYPAD (SYM (keymap_x11, group, 1)))
{
/* Shift, Shift_Lock cancel Num_Lock
*/
shift_level = (state & shift_modifiers) ? 0 : 1;
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 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_KEY_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
}
static gboolean
gdk_x11_keymap_translate_keyboard_state (GdkKeymap *keymap,
guint hardware_keycode,
GdkModifierType state,
gint group,
guint *keyval,
gint *effective_group,
gint *level,
GdkModifierType *consumed_modifiers)
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (keymap);
KeySym tmp_keyval = NoSymbol;
guint tmp_modifiers;
g_return_val_if_fail (group < 4, FALSE);
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;
}
/**
* gdk_x11_keymap_get_group_for_state:
* @keymap: (type GdkX11Keymap): a #GdkX11Keymap
* @state: raw state returned from X
*
* Extracts the group from the state field sent in an X Key event.
* This is only needed for code processing raw X events, since #GdkEventKey
* directly includes an is_modifier field.
*
* Returns: the index of the active keyboard group for the event
*
* Since: 3.6
*/
gint
gdk_x11_keymap_get_group_for_state (GdkKeymap *keymap,
guint state)
{
GdkDisplay *display;
GdkX11Display *display_x11;
g_return_val_if_fail (GDK_IS_X11_KEYMAP (keymap), 0);
display = keymap->display;
display_x11 = GDK_X11_DISPLAY (display);
#ifdef HAVE_XKB
if (display_x11->use_xkb)
{
return XkbGroupForCoreState (state);
}
else
#endif
{
GdkX11Keymap *keymap_impl = GDK_X11_KEYMAP (gdk_keymap_get_for_display (display));
update_keymaps (keymap_impl);
return (state & keymap_impl->group_switch_mask) ? 1 : 0;
}
}
void
_gdk_x11_keymap_add_virt_mods (GdkKeymap *keymap,
GdkModifierType *modifiers)
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (keymap);
int i;
/* See comment in add_virtual_modifiers() */
for (i = 4; i < 8; i++)
{
if ((1 << i) & *modifiers)
{
if (keymap_x11->modmap[i] & GDK_SUPER_MASK)
*modifiers |= GDK_SUPER_MASK;
else if (keymap_x11->modmap[i] & GDK_HYPER_MASK)
*modifiers |= GDK_HYPER_MASK;
else if (keymap_x11->modmap[i] & GDK_META_MASK)
*modifiers |= GDK_META_MASK;
}
}
}
static void
gdk_x11_keymap_add_virtual_modifiers (GdkKeymap *keymap,
GdkModifierType *state)
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (keymap);
int i;
/* This loop used to start at 3, which included MOD1 in the
* virtual mapping. However, all of GTK+ treats MOD1 as a
* synonym for Alt, and does not expect it to be mapped around,
* therefore it's more sane to simply treat MOD1 like SHIFT and
* CONTROL, which are not mappable either.
*/
for (i = 4; i < 8; i++)
{
if ((1 << i) & *state)
{
if (keymap_x11->modmap[i] & GDK_SUPER_MASK)
*state |= GDK_SUPER_MASK;
if (keymap_x11->modmap[i] & GDK_HYPER_MASK)
*state |= GDK_HYPER_MASK;
if (keymap_x11->modmap[i] & GDK_META_MASK)
*state |= GDK_META_MASK;
}
}
}
/**
* gdk_x11_keymap_key_is_modifier:
* @keymap: (type GdkX11Keymap): a #GdkX11Keymap
* @keycode: the hardware keycode from a key event
*
* Determines whether a particular key code represents a key that
* is a modifier. That is, it’s a key that normally just affects
* the keyboard state and the behavior of other keys rather than
* producing a direct effect itself. This is only needed for code
* processing raw X events, since #GdkEventKey directly includes
* an is_modifier field.
*
* Returns: %TRUE if the hardware keycode is a modifier key
*
* Since: 3.6
*/
gboolean
gdk_x11_keymap_key_is_modifier (GdkKeymap *keymap,
guint keycode)
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (keymap);
gint i;
g_return_val_if_fail (GDK_IS_X11_KEYMAP (keymap), FALSE);
update_keyrange (keymap_x11);
if (keycode < keymap_x11->min_keycode ||
keycode > keymap_x11->max_keycode)
return FALSE;
#ifdef HAVE_XKB
if (KEYMAP_USE_XKB (keymap))
{
XkbDescRec *xkb = get_xkb (keymap_x11);
if (xkb->map->modmap && xkb->map->modmap[keycode] != 0)
return TRUE;
}
else
#endif
{
for (i = 0; i < 8 * keymap_x11->mod_keymap->max_keypermod; i++)
{
if (keycode == keymap_x11->mod_keymap->modifiermap[i])
return TRUE;
}
}
return FALSE;
}
static gboolean
gdk_x11_keymap_map_virtual_modifiers (GdkKeymap *keymap,
GdkModifierType *state)
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (keymap);
const guint vmods[] = { GDK_SUPER_MASK, GDK_HYPER_MASK, GDK_META_MASK };
int i, j;
gboolean retval;
if (KEYMAP_USE_XKB (keymap))
get_xkb (keymap_x11);
retval = TRUE;
for (j = 0; j < 3; j++)
{
if (*state & vmods[j])
{
/* See comment in add_virtual_modifiers() */
for (i = 4; i < 8; i++)
{
if (keymap_x11->modmap[i] & vmods[j])
{
if (*state & (1 << i))
retval = FALSE;
else
*state |= 1 << i;
}
}
}
}
return retval;
}
static GdkModifierType
gdk_x11_keymap_get_modifier_mask (GdkKeymap *keymap,
GdkModifierIntent intent)
{
GdkX11Keymap *keymap_x11 = GDK_X11_KEYMAP (keymap);
switch (intent)
{
case GDK_MODIFIER_INTENT_SHIFT_GROUP:
return keymap_x11->group_switch_mask;
default:
return GDK_KEYMAP_CLASS (gdk_x11_keymap_parent_class)->get_modifier_mask (keymap,
intent);
}
}
static void
gdk_x11_keymap_class_init (GdkX11KeymapClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GdkKeymapClass *keymap_class = GDK_KEYMAP_CLASS (klass);
object_class->finalize = gdk_x11_keymap_finalize;
keymap_class->get_direction = gdk_x11_keymap_get_direction;
keymap_class->have_bidi_layouts = gdk_x11_keymap_have_bidi_layouts;
keymap_class->get_caps_lock_state = gdk_x11_keymap_get_caps_lock_state;
keymap_class->get_num_lock_state = gdk_x11_keymap_get_num_lock_state;
keymap_class->get_modifier_state = gdk_x11_keymap_get_modifier_state;
keymap_class->get_entries_for_keyval = gdk_x11_keymap_get_entries_for_keyval;
keymap_class->get_entries_for_keycode = gdk_x11_keymap_get_entries_for_keycode;
keymap_class->lookup_key = gdk_x11_keymap_lookup_key;
keymap_class->translate_keyboard_state = gdk_x11_keymap_translate_keyboard_state;
keymap_class->add_virtual_modifiers = gdk_x11_keymap_add_virtual_modifiers;
keymap_class->map_virtual_modifiers = gdk_x11_keymap_map_virtual_modifiers;
keymap_class->get_modifier_mask = gdk_x11_keymap_get_modifier_mask;
}
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