e160babe3f
meta_parse_accelerator() considers 0 length accelerator strings as valid, meaning that the keybinding should be disabled. Unfortunately, it doesn't initialize the MetaKeyCombo so if the caller doesn't initialize it either, we end up using random values and possibly grabbing random keys. https://bugzilla.gnome.org/show_bug.cgi?id=766270
357 lines
9.9 KiB
C
357 lines
9.9 KiB
C
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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/*
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* Copyright (C) 2014 Red Hat
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*
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* Written by:
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* Jasper St. Pierre <jstpierre@mecheye.net>
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*/
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#include "config.h"
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#include "meta-accel-parse.h"
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#include "keybindings-private.h"
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#include <xkbcommon/xkbcommon.h>
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#include <string.h>
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#include <stdlib.h>
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/* This is copied from GTK+ and modified to work with mutter's
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* internal structures. Originating code comes from gtk/gtkaccelgroup.c
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*/
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static inline gboolean
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is_alt (const gchar *string)
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{
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return ((string[0] == '<') &&
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(string[1] == 'a' || string[1] == 'A') &&
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(string[2] == 'l' || string[2] == 'L') &&
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(string[3] == 't' || string[3] == 'T') &&
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(string[4] == '>'));
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}
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static inline gboolean
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is_ctl (const gchar *string)
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{
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return ((string[0] == '<') &&
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(string[1] == 'c' || string[1] == 'C') &&
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(string[2] == 't' || string[2] == 'T') &&
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(string[3] == 'l' || string[3] == 'L') &&
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(string[4] == '>'));
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}
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static inline gboolean
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is_modx (const gchar *string)
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{
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return ((string[0] == '<') &&
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(string[1] == 'm' || string[1] == 'M') &&
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(string[2] == 'o' || string[2] == 'O') &&
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(string[3] == 'd' || string[3] == 'D') &&
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(string[4] >= '1' && string[4] <= '5') &&
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(string[5] == '>'));
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}
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static inline gboolean
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is_ctrl (const gchar *string)
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{
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return ((string[0] == '<') &&
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(string[1] == 'c' || string[1] == 'C') &&
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(string[2] == 't' || string[2] == 'T') &&
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(string[3] == 'r' || string[3] == 'R') &&
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(string[4] == 'l' || string[4] == 'L') &&
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(string[5] == '>'));
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}
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static inline gboolean
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is_shft (const gchar *string)
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{
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return ((string[0] == '<') &&
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(string[1] == 's' || string[1] == 'S') &&
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(string[2] == 'h' || string[2] == 'H') &&
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(string[3] == 'f' || string[3] == 'F') &&
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(string[4] == 't' || string[4] == 'T') &&
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(string[5] == '>'));
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}
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static inline gboolean
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is_shift (const gchar *string)
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{
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return ((string[0] == '<') &&
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(string[1] == 's' || string[1] == 'S') &&
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(string[2] == 'h' || string[2] == 'H') &&
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(string[3] == 'i' || string[3] == 'I') &&
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(string[4] == 'f' || string[4] == 'F') &&
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(string[5] == 't' || string[5] == 'T') &&
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(string[6] == '>'));
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}
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static inline gboolean
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is_control (const gchar *string)
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{
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return ((string[0] == '<') &&
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(string[1] == 'c' || string[1] == 'C') &&
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(string[2] == 'o' || string[2] == 'O') &&
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(string[3] == 'n' || string[3] == 'N') &&
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(string[4] == 't' || string[4] == 'T') &&
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(string[5] == 'r' || string[5] == 'R') &&
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(string[6] == 'o' || string[6] == 'O') &&
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(string[7] == 'l' || string[7] == 'L') &&
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(string[8] == '>'));
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}
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static inline gboolean
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is_meta (const gchar *string)
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{
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return ((string[0] == '<') &&
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(string[1] == 'm' || string[1] == 'M') &&
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(string[2] == 'e' || string[2] == 'E') &&
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(string[3] == 't' || string[3] == 'T') &&
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(string[4] == 'a' || string[4] == 'A') &&
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(string[5] == '>'));
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}
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static inline gboolean
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is_super (const gchar *string)
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{
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return ((string[0] == '<') &&
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(string[1] == 's' || string[1] == 'S') &&
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(string[2] == 'u' || string[2] == 'U') &&
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(string[3] == 'p' || string[3] == 'P') &&
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(string[4] == 'e' || string[4] == 'E') &&
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(string[5] == 'r' || string[5] == 'R') &&
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(string[6] == '>'));
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}
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static inline gboolean
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is_hyper (const gchar *string)
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{
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return ((string[0] == '<') &&
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(string[1] == 'h' || string[1] == 'H') &&
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(string[2] == 'y' || string[2] == 'Y') &&
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(string[3] == 'p' || string[3] == 'P') &&
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(string[4] == 'e' || string[4] == 'E') &&
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(string[5] == 'r' || string[5] == 'R') &&
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(string[6] == '>'));
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}
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static inline gboolean
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is_primary (const gchar *string)
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{
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return ((string[0] == '<') &&
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(string[1] == 'p' || string[1] == 'P') &&
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(string[2] == 'r' || string[2] == 'R') &&
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(string[3] == 'i' || string[3] == 'I') &&
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(string[4] == 'm' || string[4] == 'M') &&
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(string[5] == 'a' || string[5] == 'A') &&
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(string[6] == 'r' || string[6] == 'R') &&
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(string[7] == 'y' || string[7] == 'Y') &&
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(string[8] == '>'));
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}
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static inline gboolean
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is_keycode (const gchar *string)
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{
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return (string[0] == '0' &&
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string[1] == 'x' &&
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g_ascii_isxdigit (string[2]) &&
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g_ascii_isxdigit (string[3]));
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}
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static gboolean
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accelerator_parse (const gchar *accelerator,
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MetaKeyCombo *combo)
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{
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guint keyval, keycode;
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MetaVirtualModifier mods;
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gint len;
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combo->keysym = 0;
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combo->keycode = 0;
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combo->modifiers = 0;
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if (accelerator == NULL)
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return FALSE;
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keyval = 0;
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keycode = 0;
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mods = 0;
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len = strlen (accelerator);
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while (len)
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{
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if (*accelerator == '<')
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{
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if (len >= 9 && is_primary (accelerator))
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{
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/* Primary is treated the same as Control */
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accelerator += 9;
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len -= 9;
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mods |= META_VIRTUAL_CONTROL_MASK;
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}
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else if (len >= 9 && is_control (accelerator))
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{
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accelerator += 9;
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len -= 9;
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mods |= META_VIRTUAL_CONTROL_MASK;
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}
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else if (len >= 7 && is_shift (accelerator))
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{
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accelerator += 7;
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len -= 7;
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mods |= META_VIRTUAL_SHIFT_MASK;
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}
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else if (len >= 6 && is_shft (accelerator))
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{
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accelerator += 6;
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len -= 6;
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mods |= META_VIRTUAL_SHIFT_MASK;
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}
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else if (len >= 6 && is_ctrl (accelerator))
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{
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accelerator += 6;
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len -= 6;
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mods |= META_VIRTUAL_CONTROL_MASK;
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}
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else if (len >= 6 && is_modx (accelerator))
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{
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static const guint mod_vals[] = {
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META_VIRTUAL_ALT_MASK,
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META_VIRTUAL_MOD2_MASK,
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META_VIRTUAL_MOD3_MASK,
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META_VIRTUAL_MOD4_MASK,
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META_VIRTUAL_MOD5_MASK,
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};
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len -= 6;
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accelerator += 4;
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mods |= mod_vals[*accelerator - '1'];
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accelerator += 2;
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}
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else if (len >= 5 && is_ctl (accelerator))
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{
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accelerator += 5;
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len -= 5;
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mods |= META_VIRTUAL_CONTROL_MASK;
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}
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else if (len >= 5 && is_alt (accelerator))
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{
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accelerator += 5;
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len -= 5;
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mods |= META_VIRTUAL_ALT_MASK;
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}
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else if (len >= 6 && is_meta (accelerator))
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{
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accelerator += 6;
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len -= 6;
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mods |= META_VIRTUAL_META_MASK;
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}
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else if (len >= 7 && is_hyper (accelerator))
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{
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accelerator += 7;
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len -= 7;
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mods |= META_VIRTUAL_HYPER_MASK;
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}
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else if (len >= 7 && is_super (accelerator))
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{
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accelerator += 7;
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len -= 7;
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mods |= META_VIRTUAL_SUPER_MASK;
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}
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else
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{
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gchar last_ch;
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last_ch = *accelerator;
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while (last_ch && last_ch != '>')
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{
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last_ch = *accelerator;
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accelerator += 1;
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len -= 1;
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}
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}
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}
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else
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{
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if (len >= 4 && is_keycode (accelerator))
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{
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keycode = strtoul (accelerator, NULL, 16);
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goto out;
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}
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else if (strcmp (accelerator, "Above_Tab") == 0)
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{
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keyval = META_KEY_ABOVE_TAB;
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goto out;
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}
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else
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{
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keyval = xkb_keysym_from_name (accelerator, XKB_KEYSYM_CASE_INSENSITIVE);
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if (keyval == XKB_KEY_NoSymbol)
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{
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char *with_xf86 = g_strconcat ("XF86", accelerator, NULL);
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keyval = xkb_keysym_from_name (with_xf86, XKB_KEYSYM_CASE_INSENSITIVE);
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g_free (with_xf86);
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if (keyval == XKB_KEY_NoSymbol)
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return FALSE;
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}
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}
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accelerator += len;
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len -= len;
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}
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}
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out:
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combo->keysym = keyval;
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combo->keycode = keycode;
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combo->modifiers = mods;
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return TRUE;
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}
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gboolean
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meta_parse_accelerator (const char *accel,
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MetaKeyCombo *combo)
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{
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g_return_val_if_fail (combo != NULL, FALSE);
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*combo = (MetaKeyCombo) { 0 };
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if (!accel[0] || strcmp (accel, "disabled") == 0)
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return TRUE;
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return accelerator_parse (accel, combo);
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}
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gboolean
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meta_parse_modifier (const char *accel,
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MetaVirtualModifier *mask)
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{
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MetaKeyCombo combo = { 0 };
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g_return_val_if_fail (mask != NULL, FALSE);
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*mask = 0;
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if (accel == NULL || !accel[0] || strcmp (accel, "disabled") == 0)
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return TRUE;
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if (!accelerator_parse (accel, &combo))
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return FALSE;
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*mask = combo.modifiers;
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return TRUE;
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}
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