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sugar-toolkit-gtk3/lib/eggaccelerators.c
Marco Pesenti Gritti 68ff71a0cb Split part of the sugar library to sugar-base
2007-10-15 15:39:07 +02:00

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/* eggaccelerators.c
* Copyright (C) 2002 Red Hat, Inc.; Copyright 1998, 2001 Tim Janik
* Developed by Havoc Pennington, Tim Janik
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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.
*/
#include "eggaccelerators.h"
#include <stdlib.h>
#include <string.h>
#include <gdk/gdkx.h>
#include <gdk/gdkkeysyms.h>
enum
{
EGG_MODMAP_ENTRY_SHIFT = 0,
EGG_MODMAP_ENTRY_LOCK = 1,
EGG_MODMAP_ENTRY_CONTROL = 2,
EGG_MODMAP_ENTRY_MOD1 = 3,
EGG_MODMAP_ENTRY_MOD2 = 4,
EGG_MODMAP_ENTRY_MOD3 = 5,
EGG_MODMAP_ENTRY_MOD4 = 6,
EGG_MODMAP_ENTRY_MOD5 = 7,
EGG_MODMAP_ENTRY_LAST = 8
};
#define MODMAP_ENTRY_TO_MODIFIER(x) (1 << (x))
typedef struct
{
EggVirtualModifierType mapping[EGG_MODMAP_ENTRY_LAST];
} EggModmap;
const EggModmap* egg_keymap_get_modmap (GdkKeymap *keymap);
static inline gboolean
is_alt (const gchar *string)
{
return ((string[0] == '<') &&
(string[1] == 'a' || string[1] == 'A') &&
(string[2] == 'l' || string[2] == 'L') &&
(string[3] == 't' || string[3] == 'T') &&
(string[4] == '>'));
}
static inline gboolean
is_ctl (const gchar *string)
{
return ((string[0] == '<') &&
(string[1] == 'c' || string[1] == 'C') &&
(string[2] == 't' || string[2] == 'T') &&
(string[3] == 'l' || string[3] == 'L') &&
(string[4] == '>'));
}
static inline gboolean
is_modx (const gchar *string)
{
return ((string[0] == '<') &&
(string[1] == 'm' || string[1] == 'M') &&
(string[2] == 'o' || string[2] == 'O') &&
(string[3] == 'd' || string[3] == 'D') &&
(string[4] >= '1' && string[4] <= '5') &&
(string[5] == '>'));
}
static inline gboolean
is_ctrl (const gchar *string)
{
return ((string[0] == '<') &&
(string[1] == 'c' || string[1] == 'C') &&
(string[2] == 't' || string[2] == 'T') &&
(string[3] == 'r' || string[3] == 'R') &&
(string[4] == 'l' || string[4] == 'L') &&
(string[5] == '>'));
}
static inline gboolean
is_shft (const gchar *string)
{
return ((string[0] == '<') &&
(string[1] == 's' || string[1] == 'S') &&
(string[2] == 'h' || string[2] == 'H') &&
(string[3] == 'f' || string[3] == 'F') &&
(string[4] == 't' || string[4] == 'T') &&
(string[5] == '>'));
}
static inline gboolean
is_shift (const gchar *string)
{
return ((string[0] == '<') &&
(string[1] == 's' || string[1] == 'S') &&
(string[2] == 'h' || string[2] == 'H') &&
(string[3] == 'i' || string[3] == 'I') &&
(string[4] == 'f' || string[4] == 'F') &&
(string[5] == 't' || string[5] == 'T') &&
(string[6] == '>'));
}
static inline gboolean
is_control (const gchar *string)
{
return ((string[0] == '<') &&
(string[1] == 'c' || string[1] == 'C') &&
(string[2] == 'o' || string[2] == 'O') &&
(string[3] == 'n' || string[3] == 'N') &&
(string[4] == 't' || string[4] == 'T') &&
(string[5] == 'r' || string[5] == 'R') &&
(string[6] == 'o' || string[6] == 'O') &&
(string[7] == 'l' || string[7] == 'L') &&
(string[8] == '>'));
}
static inline gboolean
is_release (const gchar *string)
{
return ((string[0] == '<') &&
(string[1] == 'r' || string[1] == 'R') &&
(string[2] == 'e' || string[2] == 'E') &&
(string[3] == 'l' || string[3] == 'L') &&
(string[4] == 'e' || string[4] == 'E') &&
(string[5] == 'a' || string[5] == 'A') &&
(string[6] == 's' || string[6] == 'S') &&
(string[7] == 'e' || string[7] == 'E') &&
(string[8] == '>'));
}
static inline gboolean
is_meta (const gchar *string)
{
return ((string[0] == '<') &&
(string[1] == 'm' || string[1] == 'M') &&
(string[2] == 'e' || string[2] == 'E') &&
(string[3] == 't' || string[3] == 'T') &&
(string[4] == 'a' || string[4] == 'A') &&
(string[5] == '>'));
}
static inline gboolean
is_super (const gchar *string)
{
return ((string[0] == '<') &&
(string[1] == 's' || string[1] == 'S') &&
(string[2] == 'u' || string[2] == 'U') &&
(string[3] == 'p' || string[3] == 'P') &&
(string[4] == 'e' || string[4] == 'E') &&
(string[5] == 'r' || string[5] == 'R') &&
(string[6] == '>'));
}
static inline gboolean
is_hyper (const gchar *string)
{
return ((string[0] == '<') &&
(string[1] == 'h' || string[1] == 'H') &&
(string[2] == 'y' || string[2] == 'Y') &&
(string[3] == 'p' || string[3] == 'P') &&
(string[4] == 'e' || string[4] == 'E') &&
(string[5] == 'r' || string[5] == 'R') &&
(string[6] == '>'));
}
static inline gboolean
is_keycode (const gchar *string)
{
return ((string[0] == '0') &&
(string[1] == 'x'));
}
/**
* egg_accelerator_parse_virtual:
* @accelerator: string representing an accelerator
* @accelerator_key: return location for accelerator keyval
* @accelerator_mods: return location for accelerator modifier mask
*
* Parses a string representing a virtual accelerator. The format
* looks like "&lt;Control&gt;a" or "&lt;Shift&gt;&lt;Alt&gt;F1" or
* "&lt;Release&gt;z" (the last one is for key release). The parser
* is fairly liberal and allows lower or upper case, and also
* abbreviations such as "&lt;Ctl&gt;" and "&lt;Ctrl&gt;".
*
* If the parse fails, @accelerator_key and @accelerator_mods will
* be set to 0 (zero) and %FALSE will be returned. If the string contains
* only modifiers, @accelerator_key will be set to 0 but %TRUE will be
* returned.
*
* The virtual vs. concrete accelerator distinction is a relic of
* how the X Window System works; there are modifiers Mod2-Mod5 that
* can represent various keyboard keys (numlock, meta, hyper, etc.),
* the virtual modifier represents the keyboard key, the concrete
* modifier the actual Mod2-Mod5 bits in the key press event.
*
* Returns: %TRUE on success.
*/
gboolean
egg_accelerator_parse_virtual (const gchar *accelerator,
guint *accelerator_key,
guint *keycode,
EggVirtualModifierType *accelerator_mods)
{
guint keyval;
GdkModifierType mods;
gint len;
gboolean bad_keyval;
if (accelerator_key)
*accelerator_key = 0;
if (accelerator_mods)
*accelerator_mods = 0;
if (keycode)
*keycode = 0;
g_return_val_if_fail (accelerator != NULL, FALSE);
bad_keyval = FALSE;
keyval = 0;
mods = 0;
len = strlen (accelerator);
while (len)
{
if (*accelerator == '<')
{
if (len >= 9 && is_release (accelerator))
{
accelerator += 9;
len -= 9;
mods |= EGG_VIRTUAL_RELEASE_MASK;
}
else if (len >= 9 && is_control (accelerator))
{
accelerator += 9;
len -= 9;
mods |= EGG_VIRTUAL_CONTROL_MASK;
}
else if (len >= 7 && is_shift (accelerator))
{
accelerator += 7;
len -= 7;
mods |= EGG_VIRTUAL_SHIFT_MASK;
}
else if (len >= 6 && is_shft (accelerator))
{
accelerator += 6;
len -= 6;
mods |= EGG_VIRTUAL_SHIFT_MASK;
}
else if (len >= 6 && is_ctrl (accelerator))
{
accelerator += 6;
len -= 6;
mods |= EGG_VIRTUAL_CONTROL_MASK;
}
else if (len >= 6 && is_modx (accelerator))
{
static const guint mod_vals[] = {
EGG_VIRTUAL_ALT_MASK, EGG_VIRTUAL_MOD2_MASK, EGG_VIRTUAL_MOD3_MASK,
EGG_VIRTUAL_MOD4_MASK, EGG_VIRTUAL_MOD5_MASK
};
len -= 6;
accelerator += 4;
mods |= mod_vals[*accelerator - '1'];
accelerator += 2;
}
else if (len >= 5 && is_ctl (accelerator))
{
accelerator += 5;
len -= 5;
mods |= EGG_VIRTUAL_CONTROL_MASK;
}
else if (len >= 5 && is_alt (accelerator))
{
accelerator += 5;
len -= 5;
mods |= EGG_VIRTUAL_ALT_MASK;
}
else if (len >= 6 && is_meta (accelerator))
{
accelerator += 6;
len -= 6;
mods |= EGG_VIRTUAL_META_MASK;
}
else if (len >= 7 && is_hyper (accelerator))
{
accelerator += 7;
len -= 7;
mods |= EGG_VIRTUAL_HYPER_MASK;
}
else if (len >= 7 && is_super (accelerator))
{
accelerator += 7;
len -= 7;
mods |= EGG_VIRTUAL_SUPER_MASK;
}
else
{
gchar last_ch;
last_ch = *accelerator;
while (last_ch && last_ch != '>')
{
last_ch = *accelerator;
accelerator += 1;
len -= 1;
}
}
}
else
{
keyval = gdk_keyval_from_name (accelerator);
if (keyval == 0)
{
/* If keyval is 0, than maybe it's a keycode. Check for 0x## */
if (len >= 4 && is_keycode (accelerator))
{
char keystring[5];
gchar *endptr;
gint tmp_keycode;
memcpy (keystring, accelerator, 4);
keystring [4] = '\000';
tmp_keycode = strtol (keystring, &endptr, 16);
if (endptr == NULL || *endptr != '\000')
{
bad_keyval = TRUE;
}
else if (keycode != NULL)
{
*keycode = tmp_keycode;
/* 0x00 is an invalid keycode too. */
if (*keycode == 0)
bad_keyval = TRUE;
}
}
} else if (keycode != NULL)
*keycode = XKeysymToKeycode (GDK_DISPLAY(), keyval);
accelerator += len;
len -= len;
}
}
if (accelerator_key)
*accelerator_key = gdk_keyval_to_lower (keyval);
if (accelerator_mods)
*accelerator_mods = mods;
return !bad_keyval;
}
/**
* egg_virtual_accelerator_name:
* @accelerator_key: accelerator keyval
* @accelerator_mods: accelerator modifier mask
* @returns: a newly-allocated accelerator name
*
* Converts an accelerator keyval and modifier mask
* into a string parseable by egg_accelerator_parse_virtual().
* For example, if you pass in #GDK_q and #EGG_VIRTUAL_CONTROL_MASK,
* this function returns "&lt;Control&gt;q".
*
* The caller of this function must free the returned string.
*/
gchar*
egg_virtual_accelerator_name (guint accelerator_key,
guint keycode,
EggVirtualModifierType accelerator_mods)
{
static const gchar text_release[] = "<Release>";
static const gchar text_shift[] = "<Shift>";
static const gchar text_control[] = "<Control>";
static const gchar text_mod1[] = "<Alt>";
static const gchar text_mod2[] = "<Mod2>";
static const gchar text_mod3[] = "<Mod3>";
static const gchar text_mod4[] = "<Mod4>";
static const gchar text_mod5[] = "<Mod5>";
static const gchar text_meta[] = "<Meta>";
static const gchar text_super[] = "<Super>";
static const gchar text_hyper[] = "<Hyper>";
guint l;
gchar *keyval_name;
gchar *accelerator;
accelerator_mods &= EGG_VIRTUAL_MODIFIER_MASK;
if (!accelerator_key)
{
keyval_name = g_strdup_printf ("0x%02x", keycode);
}
else
{
keyval_name = gdk_keyval_name (gdk_keyval_to_lower (accelerator_key));
if (!keyval_name)
keyval_name = "";
}
l = 0;
if (accelerator_mods & EGG_VIRTUAL_RELEASE_MASK)
l += sizeof (text_release) - 1;
if (accelerator_mods & EGG_VIRTUAL_SHIFT_MASK)
l += sizeof (text_shift) - 1;
if (accelerator_mods & EGG_VIRTUAL_CONTROL_MASK)
l += sizeof (text_control) - 1;
if (accelerator_mods & EGG_VIRTUAL_ALT_MASK)
l += sizeof (text_mod1) - 1;
if (accelerator_mods & EGG_VIRTUAL_MOD2_MASK)
l += sizeof (text_mod2) - 1;
if (accelerator_mods & EGG_VIRTUAL_MOD3_MASK)
l += sizeof (text_mod3) - 1;
if (accelerator_mods & EGG_VIRTUAL_MOD4_MASK)
l += sizeof (text_mod4) - 1;
if (accelerator_mods & EGG_VIRTUAL_MOD5_MASK)
l += sizeof (text_mod5) - 1;
if (accelerator_mods & EGG_VIRTUAL_META_MASK)
l += sizeof (text_meta) - 1;
if (accelerator_mods & EGG_VIRTUAL_HYPER_MASK)
l += sizeof (text_hyper) - 1;
if (accelerator_mods & EGG_VIRTUAL_SUPER_MASK)
l += sizeof (text_super) - 1;
l += strlen (keyval_name);
accelerator = g_new (gchar, l + 1);
l = 0;
accelerator[l] = 0;
if (accelerator_mods & EGG_VIRTUAL_RELEASE_MASK)
{
strcpy (accelerator + l, text_release);
l += sizeof (text_release) - 1;
}
if (accelerator_mods & EGG_VIRTUAL_SHIFT_MASK)
{
strcpy (accelerator + l, text_shift);
l += sizeof (text_shift) - 1;
}
if (accelerator_mods & EGG_VIRTUAL_CONTROL_MASK)
{
strcpy (accelerator + l, text_control);
l += sizeof (text_control) - 1;
}
if (accelerator_mods & EGG_VIRTUAL_ALT_MASK)
{
strcpy (accelerator + l, text_mod1);
l += sizeof (text_mod1) - 1;
}
if (accelerator_mods & EGG_VIRTUAL_MOD2_MASK)
{
strcpy (accelerator + l, text_mod2);
l += sizeof (text_mod2) - 1;
}
if (accelerator_mods & EGG_VIRTUAL_MOD3_MASK)
{
strcpy (accelerator + l, text_mod3);
l += sizeof (text_mod3) - 1;
}
if (accelerator_mods & EGG_VIRTUAL_MOD4_MASK)
{
strcpy (accelerator + l, text_mod4);
l += sizeof (text_mod4) - 1;
}
if (accelerator_mods & EGG_VIRTUAL_MOD5_MASK)
{
strcpy (accelerator + l, text_mod5);
l += sizeof (text_mod5) - 1;
}
if (accelerator_mods & EGG_VIRTUAL_META_MASK)
{
strcpy (accelerator + l, text_meta);
l += sizeof (text_meta) - 1;
}
if (accelerator_mods & EGG_VIRTUAL_HYPER_MASK)
{
strcpy (accelerator + l, text_hyper);
l += sizeof (text_hyper) - 1;
}
if (accelerator_mods & EGG_VIRTUAL_SUPER_MASK)
{
strcpy (accelerator + l, text_super);
l += sizeof (text_super) - 1;
}
strcpy (accelerator + l, keyval_name);
return accelerator;
}
void
egg_keymap_resolve_virtual_modifiers (GdkKeymap *keymap,
EggVirtualModifierType virtual_mods,
GdkModifierType *concrete_mods)
{
GdkModifierType concrete;
int i;
const EggModmap *modmap;
g_return_if_fail (GDK_IS_KEYMAP (keymap));
g_return_if_fail (concrete_mods != NULL);
modmap = egg_keymap_get_modmap (keymap);
/* Not so sure about this algorithm. */
concrete = 0;
i = 0;
while (i < EGG_MODMAP_ENTRY_LAST)
{
if (modmap->mapping[i] & virtual_mods)
concrete |= (1 << i);
++i;
}
*concrete_mods = concrete;
}
void
egg_keymap_virtualize_modifiers (GdkKeymap *keymap,
GdkModifierType concrete_mods,
EggVirtualModifierType *virtual_mods)
{
GdkModifierType virtual;
int i;
const EggModmap *modmap;
g_return_if_fail (GDK_IS_KEYMAP (keymap));
g_return_if_fail (virtual_mods != NULL);
modmap = egg_keymap_get_modmap (keymap);
/* Not so sure about this algorithm. */
virtual = 0;
i = 0;
while (i < EGG_MODMAP_ENTRY_LAST)
{
if ((1 << i) & concrete_mods)
{
EggVirtualModifierType cleaned;
cleaned = modmap->mapping[i] & ~(EGG_VIRTUAL_MOD2_MASK |
EGG_VIRTUAL_MOD3_MASK |
EGG_VIRTUAL_MOD4_MASK |
EGG_VIRTUAL_MOD5_MASK);
if (cleaned != 0)
{
virtual |= cleaned;
}
else
{
/* Rather than dropping mod2->mod5 if not bound,
* go ahead and use the concrete names
*/
virtual |= modmap->mapping[i];
}
}
++i;
}
*virtual_mods = virtual;
}
static void
reload_modmap (GdkKeymap *keymap,
EggModmap *modmap)
{
XModifierKeymap *xmodmap;
int map_size;
int i;
/* FIXME multihead */
xmodmap = XGetModifierMapping (gdk_x11_get_default_xdisplay ());
memset (modmap->mapping, 0, sizeof (modmap->mapping));
/* there are 8 modifiers, and the first 3 are shift, shift lock,
* and control
*/
map_size = 8 * xmodmap->max_keypermod;
i = 3 * xmodmap->max_keypermod;
while (i < map_size)
{
/* get the key code at this point in the map,
* see if its keysym is one we're interested in
*/
int keycode = xmodmap->modifiermap[i];
GdkKeymapKey *keys;
guint *keyvals;
int n_entries;
int j;
EggVirtualModifierType mask;
keys = NULL;
keyvals = NULL;
n_entries = 0;
gdk_keymap_get_entries_for_keycode (keymap,
keycode,
&keys, &keyvals, &n_entries);
mask = 0;
j = 0;
while (j < n_entries)
{
if (keyvals[j] == GDK_Num_Lock)
mask |= EGG_VIRTUAL_NUM_LOCK_MASK;
else if (keyvals[j] == GDK_Scroll_Lock)
mask |= EGG_VIRTUAL_SCROLL_LOCK_MASK;
else if (keyvals[j] == GDK_Meta_L ||
keyvals[j] == GDK_Meta_R)
mask |= EGG_VIRTUAL_META_MASK;
else if (keyvals[j] == GDK_Hyper_L ||
keyvals[j] == GDK_Hyper_R)
mask |= EGG_VIRTUAL_HYPER_MASK;
else if (keyvals[j] == GDK_Super_L ||
keyvals[j] == GDK_Super_R)
mask |= EGG_VIRTUAL_SUPER_MASK;
else if (keyvals[j] == GDK_Mode_switch)
mask |= EGG_VIRTUAL_MODE_SWITCH_MASK;
++j;
}
/* Mod1Mask is 1 << 3 for example, i.e. the
* fourth modifier, i / keyspermod is the modifier
* index
*/
modmap->mapping[i/xmodmap->max_keypermod] |= mask;
g_free (keyvals);
g_free (keys);
++i;
}
/* Add in the not-really-virtual fixed entries */
modmap->mapping[EGG_MODMAP_ENTRY_SHIFT] |= EGG_VIRTUAL_SHIFT_MASK;
modmap->mapping[EGG_MODMAP_ENTRY_CONTROL] |= EGG_VIRTUAL_CONTROL_MASK;
modmap->mapping[EGG_MODMAP_ENTRY_LOCK] |= EGG_VIRTUAL_LOCK_MASK;
modmap->mapping[EGG_MODMAP_ENTRY_MOD1] |= EGG_VIRTUAL_ALT_MASK;
modmap->mapping[EGG_MODMAP_ENTRY_MOD2] |= EGG_VIRTUAL_MOD2_MASK;
modmap->mapping[EGG_MODMAP_ENTRY_MOD3] |= EGG_VIRTUAL_MOD3_MASK;
modmap->mapping[EGG_MODMAP_ENTRY_MOD4] |= EGG_VIRTUAL_MOD4_MASK;
modmap->mapping[EGG_MODMAP_ENTRY_MOD5] |= EGG_VIRTUAL_MOD5_MASK;
XFreeModifiermap (xmodmap);
}
const EggModmap*
egg_keymap_get_modmap (GdkKeymap *keymap)
{
EggModmap *modmap;
/* This is all a hack, much simpler when we can just
* modify GDK directly.
*/
modmap = g_object_get_data (G_OBJECT (keymap),
"egg-modmap");
if (modmap == NULL)
{
modmap = g_new0 (EggModmap, 1);
/* FIXME modify keymap change events with an event filter
* and force a reload if we get one
*/
reload_modmap (keymap, modmap);
g_object_set_data_full (G_OBJECT (keymap),
"egg-modmap",
modmap,
g_free);
}
g_assert (modmap != NULL);
return modmap;
}
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