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e04e9aac39
mutter/src/core/meta-accel-parse.c
Jason Ekstrand e04e9aac39 Fix an uninitialized variable warning
2014-04-22 21:09:06 -04:00

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/*
* Copyright (C) 2014 Red Hat
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Written by:
* Jasper St. Pierre <jstpierre@mecheye.net>
*/
#include "config.h"
#include "meta-accel-parse.h"
#include <xkbcommon/xkbcommon.h>
#include <string.h>
#include <stdlib.h>
/* This is copied from GTK+ and modified to work with mutter's
* internal structures. Originating code comes from gtk/gtkaccelgroup.c
*/
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_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_primary (const gchar *string)
{
return ((string[0] == '<') &&
(string[1] == 'p' || string[1] == 'P') &&
(string[2] == 'r' || string[2] == 'R') &&
(string[3] == 'i' || string[3] == 'I') &&
(string[4] == 'm' || string[4] == 'M') &&
(string[5] == 'a' || string[5] == 'A') &&
(string[6] == 'r' || string[6] == 'R') &&
(string[7] == 'y' || string[7] == 'Y') &&
(string[8] == '>'));
}
static inline gboolean
is_keycode (const gchar *string)
{
return (string[0] == '0' &&
string[1] == 'x' &&
g_ascii_isxdigit (string[2]) &&
g_ascii_isxdigit (string[3]));
}
static gboolean
accelerator_parse (const gchar *accelerator,
guint *accelerator_key,
guint *accelerator_keycode,
MetaVirtualModifier *accelerator_mods)
{
gboolean error = FALSE;
guint keyval, keycode;
MetaVirtualModifier mods;
gint len;
if (accelerator_key)
*accelerator_key = 0;
if (accelerator_keycode)
*accelerator_keycode = 0;
if (accelerator_mods)
*accelerator_mods = 0;
if (accelerator == NULL)
{
error = TRUE;
goto out;
}
keyval = 0;
keycode = 0;
mods = 0;
len = strlen (accelerator);
while (len)
{
if (*accelerator == '<')
{
if (len >= 9 && is_primary (accelerator))
{
/* Primary is treated the same as Control */
accelerator += 9;
len -= 9;
mods |= META_VIRTUAL_CONTROL_MASK;
}
else if (len >= 9 && is_control (accelerator))
{
accelerator += 9;
len -= 9;
mods |= META_VIRTUAL_CONTROL_MASK;
}
else if (len >= 7 && is_shift (accelerator))
{
accelerator += 7;
len -= 7;
mods |= META_VIRTUAL_SHIFT_MASK;
}
else if (len >= 6 && is_shft (accelerator))
{
accelerator += 6;
len -= 6;
mods |= META_VIRTUAL_SHIFT_MASK;
}
else if (len >= 6 && is_ctrl (accelerator))
{
accelerator += 6;
len -= 6;
mods |= META_VIRTUAL_CONTROL_MASK;
}
else if (len >= 6 && is_modx (accelerator))
{
static const guint mod_vals[] = {
META_VIRTUAL_ALT_MASK,
META_VIRTUAL_MOD2_MASK,
META_VIRTUAL_MOD3_MASK,
META_VIRTUAL_MOD4_MASK,
META_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 |= META_VIRTUAL_CONTROL_MASK;
}
else if (len >= 5 && is_alt (accelerator))
{
accelerator += 5;
len -= 5;
mods |= META_VIRTUAL_ALT_MASK;
}
else if (len >= 6 && is_meta (accelerator))
{
accelerator += 6;
len -= 6;
mods |= META_VIRTUAL_META_MASK;
}
else if (len >= 7 && is_hyper (accelerator))
{
accelerator += 7;
len -= 7;
mods |= META_VIRTUAL_HYPER_MASK;
}
else if (len >= 7 && is_super (accelerator))
{
accelerator += 7;
len -= 7;
mods |= META_VIRTUAL_SUPER_MASK;
}
else
{
gchar last_ch;
last_ch = *accelerator;
while (last_ch && last_ch != '>')
{
last_ch = *accelerator;
accelerator += 1;
len -= 1;
}
}
}
else
{
if (len >= 4 && is_keycode (accelerator))
{
keycode = strtoul (accelerator, NULL, 16);
goto out;
}
else if (strcmp (accelerator, "Above_Tab") == 0)
{
keyval = META_KEY_ABOVE_TAB;
goto out;
}
else
{
keyval = xkb_keysym_from_name (accelerator, XKB_KEYSYM_CASE_INSENSITIVE);
if (keyval == XKB_KEY_NoSymbol)
{
error = TRUE;
goto out;
}
}
accelerator += len;
len -= len;
}
}
out:
if (error)
return FALSE;
if (accelerator_key)
*accelerator_key = keyval;
if (accelerator_keycode)
*accelerator_keycode = keycode;
if (accelerator_mods)
*accelerator_mods = mods;
return TRUE;
}
gboolean
meta_parse_accelerator (const char *accel,
unsigned int *keysym,
unsigned int *keycode,
MetaVirtualModifier *mask)
{
if (!accel[0] || strcmp (accel, "disabled") == 0)
return TRUE;
return accelerator_parse (accel, keysym, keycode, mask);
}
gboolean
meta_parse_modifier (const char *accel,
MetaVirtualModifier *mask)
{
if (accel == NULL || !accel[0] || strcmp (accel, "disabled") == 0)
return TRUE;
return accelerator_parse (accel, NULL, NULL, mask);
}
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