mutter/src/backends/meta-input-settings.c

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/*
* Copyright 2014 Red Hat, Inc.
*
* 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, see <http://www.gnu.org/licenses/>.
*
* Author: Carlos Garnacho <carlosg@gnome.org>
*/
/**
* SECTION:input-settings
* @title: MetaInputSettings
* @short_description: Mutter input device configuration
*/
#include "config.h"
#include <string.h>
#include "meta-backend-private.h"
#include "meta-input-settings-private.h"
#include "x11/meta-input-settings-x11.h"
#ifdef HAVE_NATIVE_BACKEND
#include "native/meta-backend-native.h"
#include "native/meta-input-settings-native.h"
#endif
#include <glib/gi18n-lib.h>
#include <meta/util.h>
static GQuark quark_tool_settings = 0;
typedef struct _MetaInputSettingsPrivate MetaInputSettingsPrivate;
typedef struct _DeviceMappingInfo DeviceMappingInfo;
typedef struct _ToolSettings ToolSettings;
struct _DeviceMappingInfo
{
MetaInputSettings *input_settings;
ClutterInputDevice *device;
GSettings *settings;
#ifdef HAVE_LIBWACOM
WacomDevice *wacom_device;
#endif
};
struct _ToolSettings
{
GSettings *settings;
ClutterInputDeviceTool *tool;
GDesktopStylusButtonAction button_action;
GDesktopStylusButtonAction secondary_button_action;
gdouble curve[4];
};
struct _MetaInputSettingsPrivate
{
ClutterDeviceManager *device_manager;
MetaMonitorManager *monitor_manager;
guint monitors_changed_id;
GSettings *mouse_settings;
GSettings *touchpad_settings;
GSettings *trackball_settings;
GSettings *keyboard_settings;
GHashTable *mappable_devices;
#ifdef HAVE_LIBWACOM
WacomDeviceDatabase *wacom_db;
#endif
};
typedef void (*ConfigBoolFunc) (MetaInputSettings *input_settings,
ClutterInputDevice *device,
gboolean setting);
typedef void (*ConfigDoubleFunc) (MetaInputSettings *input_settings,
ClutterInputDevice *device,
gdouble value);
typedef void (*ConfigUintFunc) (MetaInputSettings *input_settings,
ClutterInputDevice *device,
guint value);
G_DEFINE_TYPE_WITH_PRIVATE (MetaInputSettings, meta_input_settings, G_TYPE_OBJECT)
static GSList *
meta_input_settings_get_devices (MetaInputSettings *settings,
ClutterInputDeviceType type)
{
MetaInputSettingsPrivate *priv;
const GSList *devices;
GSList *list = NULL;
priv = meta_input_settings_get_instance_private (settings);
devices = clutter_device_manager_peek_devices (priv->device_manager);
while (devices)
{
ClutterInputDevice *device = devices->data;
if (clutter_input_device_get_device_type (device) == type &&
clutter_input_device_get_device_mode (device) != CLUTTER_INPUT_MODE_MASTER)
list = g_slist_prepend (list, device);
devices = devices->next;
}
return list;
}
static void
meta_input_settings_dispose (GObject *object)
{
MetaInputSettings *settings = META_INPUT_SETTINGS (object);
MetaInputSettingsPrivate *priv = meta_input_settings_get_instance_private (settings);
g_clear_object (&priv->mouse_settings);
g_clear_object (&priv->touchpad_settings);
g_clear_object (&priv->trackball_settings);
g_clear_object (&priv->keyboard_settings);
g_clear_pointer (&priv->mappable_devices, g_hash_table_unref);
if (priv->monitors_changed_id && priv->monitor_manager)
{
g_signal_handler_disconnect (priv->monitor_manager,
priv->monitors_changed_id);
priv->monitors_changed_id = 0;
}
g_clear_object (&priv->monitor_manager);
if (priv->wacom_db)
libwacom_database_destroy (priv->wacom_db);
G_OBJECT_CLASS (meta_input_settings_parent_class)->dispose (object);
}
static void
settings_device_set_bool_setting (MetaInputSettings *input_settings,
ClutterInputDevice *device,
ConfigBoolFunc func,
gboolean enabled)
{
func (input_settings, device, enabled);
}
static void
settings_set_bool_setting (MetaInputSettings *input_settings,
ClutterInputDeviceType type,
ConfigBoolFunc func,
gboolean enabled)
{
GSList *devices, *d;
devices = meta_input_settings_get_devices (input_settings, type);
for (d = devices; d; d = d->next)
settings_device_set_bool_setting (input_settings, d->data, func, enabled);
g_slist_free (devices);
}
static void
settings_device_set_double_setting (MetaInputSettings *input_settings,
ClutterInputDevice *device,
ConfigDoubleFunc func,
gdouble value)
{
func (input_settings, device, value);
}
static void
settings_set_double_setting (MetaInputSettings *input_settings,
ClutterInputDeviceType type,
ConfigDoubleFunc func,
gdouble value)
{
GSList *devices, *d;
devices = meta_input_settings_get_devices (input_settings, type);
for (d = devices; d; d = d->next)
settings_device_set_double_setting (input_settings, d->data, func, value);
g_slist_free (devices);
}
static void
settings_device_set_uint_setting (MetaInputSettings *input_settings,
ClutterInputDevice *device,
ConfigUintFunc func,
guint value)
{
(func) (input_settings, device, value);
}
static void
settings_set_uint_setting (MetaInputSettings *input_settings,
ClutterInputDeviceType type,
ConfigUintFunc func,
guint value)
{
GSList *devices, *d;
devices = meta_input_settings_get_devices (input_settings, type);
for (d = devices; d; d = d->next)
settings_device_set_uint_setting (input_settings, d->data, func, value);
g_slist_free (devices);
}
static void
update_touchpad_left_handed (MetaInputSettings *input_settings,
ClutterInputDevice *device)
{
MetaInputSettingsClass *input_settings_class;
GDesktopTouchpadHandedness handedness;
MetaInputSettingsPrivate *priv;
gboolean enabled = FALSE;
if (device &&
clutter_input_device_get_device_type (device) != CLUTTER_TOUCHPAD_DEVICE)
return;
priv = meta_input_settings_get_instance_private (input_settings);
input_settings_class = META_INPUT_SETTINGS_GET_CLASS (input_settings);
handedness = g_settings_get_enum (priv->touchpad_settings, "left-handed");
switch (handedness)
{
case G_DESKTOP_TOUCHPAD_HANDEDNESS_RIGHT:
enabled = FALSE;
break;
case G_DESKTOP_TOUCHPAD_HANDEDNESS_LEFT:
enabled = TRUE;
break;
case G_DESKTOP_TOUCHPAD_HANDEDNESS_MOUSE:
enabled = g_settings_get_boolean (priv->mouse_settings, "left-handed");
break;
default:
g_assert_not_reached ();
}
if (device)
{
settings_device_set_bool_setting (input_settings, device,
input_settings_class->set_left_handed,
enabled);
}
else
{
settings_set_bool_setting (input_settings, CLUTTER_TOUCHPAD_DEVICE,
input_settings_class->set_left_handed,
enabled);
}
}
static void
update_mouse_left_handed (MetaInputSettings *input_settings,
ClutterInputDevice *device)
{
MetaInputSettingsClass *input_settings_class;
MetaInputSettingsPrivate *priv;
gboolean enabled;
if (device &&
clutter_input_device_get_device_type (device) != CLUTTER_POINTER_DEVICE)
return;
priv = meta_input_settings_get_instance_private (input_settings);
input_settings_class = META_INPUT_SETTINGS_GET_CLASS (input_settings);
enabled = g_settings_get_boolean (priv->mouse_settings, "left-handed");
if (device)
{
settings_device_set_bool_setting (input_settings, device,
input_settings_class->set_left_handed,
enabled);
}
else
{
GDesktopTouchpadHandedness touchpad_handedness;
settings_set_bool_setting (input_settings, CLUTTER_POINTER_DEVICE,
input_settings_class->set_left_handed,
enabled);
touchpad_handedness = g_settings_get_enum (priv->touchpad_settings,
"left-handed");
/* Also update touchpads if they're following mouse settings */
if (touchpad_handedness == G_DESKTOP_TOUCHPAD_HANDEDNESS_MOUSE)
update_touchpad_left_handed (input_settings, NULL);
}
}
static GSettings *
get_settings_for_device_type (MetaInputSettings *input_settings,
ClutterInputDeviceType type)
{
MetaInputSettingsPrivate *priv;
priv = meta_input_settings_get_instance_private (input_settings);
switch (type)
{
case CLUTTER_POINTER_DEVICE:
return priv->mouse_settings;
case CLUTTER_TOUCHPAD_DEVICE:
return priv->touchpad_settings;
default:
return NULL;
}
}
static void
update_device_speed (MetaInputSettings *input_settings,
ClutterInputDevice *device)
{
GSettings *settings;
ConfigDoubleFunc func;
const gchar *key = "speed";
func = META_INPUT_SETTINGS_GET_CLASS (input_settings)->set_speed;
if (device)
{
settings = get_settings_for_device_type (input_settings,
clutter_input_device_get_device_type (device));
if (!settings)
return;
settings_device_set_double_setting (input_settings, device, func,
g_settings_get_double (settings, key));
}
else
{
settings = get_settings_for_device_type (input_settings, CLUTTER_POINTER_DEVICE);
settings_set_double_setting (input_settings, CLUTTER_POINTER_DEVICE, func,
g_settings_get_double (settings, key));
settings = get_settings_for_device_type (input_settings, CLUTTER_TOUCHPAD_DEVICE);
settings_set_double_setting (input_settings, CLUTTER_TOUCHPAD_DEVICE, func,
g_settings_get_double (settings, key));
}
}
static void
update_device_natural_scroll (MetaInputSettings *input_settings,
ClutterInputDevice *device)
{
GSettings *settings;
ConfigBoolFunc func;
const gchar *key = "natural-scroll";
func = META_INPUT_SETTINGS_GET_CLASS (input_settings)->set_invert_scroll;
if (device)
{
settings = get_settings_for_device_type (input_settings,
clutter_input_device_get_device_type (device));
if (!settings)
return;
settings_device_set_bool_setting (input_settings, device, func,
g_settings_get_boolean (settings, key));
}
else
{
settings = get_settings_for_device_type (input_settings, CLUTTER_POINTER_DEVICE);
settings_set_bool_setting (input_settings, CLUTTER_POINTER_DEVICE, func,
g_settings_get_boolean (settings, key));
settings = get_settings_for_device_type (input_settings, CLUTTER_TOUCHPAD_DEVICE);
settings_set_bool_setting (input_settings, CLUTTER_TOUCHPAD_DEVICE, func,
g_settings_get_boolean (settings, key));
}
}
static void
update_touchpad_tap_enabled (MetaInputSettings *input_settings,
ClutterInputDevice *device)
{
MetaInputSettingsClass *input_settings_class;
MetaInputSettingsPrivate *priv;
gboolean enabled;
if (device &&
clutter_input_device_get_device_type (device) != CLUTTER_TOUCHPAD_DEVICE)
return;
priv = meta_input_settings_get_instance_private (input_settings);
input_settings_class = META_INPUT_SETTINGS_GET_CLASS (input_settings);
enabled = g_settings_get_boolean (priv->touchpad_settings, "tap-to-click");
if (device)
{
settings_device_set_bool_setting (input_settings, device,
input_settings_class->set_tap_enabled,
enabled);
}
else
{
settings_set_bool_setting (input_settings, CLUTTER_TOUCHPAD_DEVICE,
input_settings_class->set_tap_enabled,
enabled);
}
}
static void
update_touchpad_edge_scroll (MetaInputSettings *input_settings,
ClutterInputDevice *device)
{
MetaInputSettingsClass *input_settings_class;
gboolean edge_scroll_enabled;
MetaInputSettingsPrivate *priv;
if (device &&
clutter_input_device_get_device_type (device) != CLUTTER_TOUCHPAD_DEVICE)
return;
priv = meta_input_settings_get_instance_private (input_settings);
input_settings_class = META_INPUT_SETTINGS_GET_CLASS (input_settings);
edge_scroll_enabled = g_settings_get_boolean (priv->touchpad_settings, "edge-scrolling-enabled");
if (device)
{
settings_device_set_bool_setting (input_settings, device,
input_settings_class->set_edge_scroll,
edge_scroll_enabled);
}
else
{
settings_set_bool_setting (input_settings, CLUTTER_TOUCHPAD_DEVICE,
(ConfigBoolFunc) input_settings_class->set_edge_scroll,
edge_scroll_enabled);
}
}
static void
update_touchpad_click_method (MetaInputSettings *input_settings,
ClutterInputDevice *device)
{
MetaInputSettingsClass *input_settings_class;
GDesktopTouchpadClickMethod method;
MetaInputSettingsPrivate *priv;
if (device &&
clutter_input_device_get_device_type (device) != CLUTTER_TOUCHPAD_DEVICE)
return;
priv = meta_input_settings_get_instance_private (input_settings);
input_settings_class = META_INPUT_SETTINGS_GET_CLASS (input_settings);
method = g_settings_get_enum (priv->touchpad_settings, "click-method");
if (device)
{
settings_device_set_uint_setting (input_settings, device,
input_settings_class->set_click_method,
method);
}
else
{
settings_set_uint_setting (input_settings, CLUTTER_TOUCHPAD_DEVICE,
(ConfigUintFunc) input_settings_class->set_click_method,
method);
}
}
static void
update_touchpad_send_events (MetaInputSettings *input_settings,
ClutterInputDevice *device)
{
MetaInputSettingsClass *input_settings_class;
MetaInputSettingsPrivate *priv;
GDesktopDeviceSendEvents mode;
if (device &&
clutter_input_device_get_device_type (device) != CLUTTER_TOUCHPAD_DEVICE)
return;
priv = meta_input_settings_get_instance_private (input_settings);
input_settings_class = META_INPUT_SETTINGS_GET_CLASS (input_settings);
mode = g_settings_get_enum (priv->touchpad_settings, "send-events");
if (device)
{
settings_device_set_uint_setting (input_settings, device,
input_settings_class->set_send_events,
mode);
}
else
{
settings_set_uint_setting (input_settings, CLUTTER_TOUCHPAD_DEVICE,
input_settings_class->set_send_events,
mode);
}
}
static gboolean
device_is_trackball (ClutterInputDevice *device)
{
gboolean is_trackball;
char *name;
if (clutter_input_device_get_device_mode (device) == CLUTTER_INPUT_MODE_MASTER)
return FALSE;
name = g_ascii_strdown (clutter_input_device_get_device_name (device), -1);
is_trackball = strstr (name, "trackball") != NULL;
g_free (name);
return is_trackball;
}
static void
update_trackball_scroll_button (MetaInputSettings *input_settings,
ClutterInputDevice *device)
{
MetaInputSettingsClass *input_settings_class;
MetaInputSettingsPrivate *priv;
guint button;
if (device && !device_is_trackball (device))
return;
priv = meta_input_settings_get_instance_private (input_settings);
input_settings_class = META_INPUT_SETTINGS_GET_CLASS (input_settings);
/* This key is 'i' in the schema but it also specifies a minimum
* range of 0 so the cast here is safe. */
button = (guint) g_settings_get_int (priv->trackball_settings, "scroll-wheel-emulation-button");
if (device)
{
input_settings_class->set_scroll_button (input_settings, device, button);
}
else if (!device)
{
const GSList *devices;
devices = clutter_device_manager_peek_devices (priv->device_manager);
while (devices)
{
2015-09-23 19:24:33 -04:00
device = devices->data;
if (device_is_trackball (device))
input_settings_class->set_scroll_button (input_settings, device, button);
devices = devices->next;
}
}
}
static void
update_keyboard_repeat (MetaInputSettings *input_settings)
{
MetaInputSettingsClass *input_settings_class;
MetaInputSettingsPrivate *priv;
guint delay, interval;
gboolean repeat;
priv = meta_input_settings_get_instance_private (input_settings);
repeat = g_settings_get_boolean (priv->keyboard_settings, "repeat");
delay = g_settings_get_uint (priv->keyboard_settings, "delay");
interval = g_settings_get_uint (priv->keyboard_settings, "repeat-interval");
input_settings_class = META_INPUT_SETTINGS_GET_CLASS (input_settings);
input_settings_class->set_keyboard_repeat (input_settings,
repeat, delay, interval);
}
static MetaOutput *
meta_input_settings_find_output (MetaInputSettings *input_settings,
GSettings *settings,
ClutterInputDevice *device)
{
MetaInputSettingsPrivate *priv;
guint n_values, n_outputs, i;
MetaOutput *outputs;
gchar **edid;
priv = meta_input_settings_get_instance_private (input_settings);
edid = g_settings_get_strv (settings, "display");
n_values = g_strv_length (edid);
if (n_values != 3)
{
g_warning ("EDID configuration for device '%s' "
"is incorrect, must have 3 values",
clutter_input_device_get_device_name (device));
return NULL;
}
if (!*edid[0] && !*edid[1] && !*edid[2])
return NULL;
outputs = meta_monitor_manager_get_outputs (priv->monitor_manager,
&n_outputs);
for (i = 0; i < n_outputs; i++)
{
if (g_strcmp0 (outputs[i].vendor, edid[0]) == 0 &&
g_strcmp0 (outputs[i].product, edid[1]) == 0 &&
g_strcmp0 (outputs[i].serial, edid[2]) == 0)
return &outputs[i];
}
return NULL;
}
static void
update_tablet_keep_aspect (MetaInputSettings *input_settings,
GSettings *settings,
ClutterInputDevice *device)
{
MetaInputSettingsClass *input_settings_class;
MetaOutput *output = NULL;
gboolean keep_aspect;
if (clutter_input_device_get_device_type (device) != CLUTTER_TABLET_DEVICE)
return;
#ifdef HAVE_LIBWACOM
{
WacomDevice *wacom_device;
wacom_device = meta_input_settings_get_tablet_wacom_device (input_settings,
device);
/* Keep aspect only makes sense in external tablets */
if (wacom_device &&
libwacom_get_integration_flags (wacom_device) != WACOM_DEVICE_INTEGRATED_NONE)
return;
}
#endif
input_settings_class = META_INPUT_SETTINGS_GET_CLASS (input_settings);
if (clutter_input_device_get_mapping_mode (device) ==
CLUTTER_INPUT_DEVICE_MAPPING_ABSOLUTE)
{
keep_aspect = g_settings_get_boolean (settings, "keep-aspect");
output = meta_input_settings_find_output (input_settings, settings, device);
}
else
{
keep_aspect = FALSE;
}
input_settings_class->set_tablet_keep_aspect (input_settings, device,
output, keep_aspect);
}
static void
update_device_display (MetaInputSettings *input_settings,
GSettings *settings,
ClutterInputDevice *device)
{
MetaInputSettingsClass *input_settings_class;
MetaInputSettingsPrivate *priv;
gfloat matrix[6] = { 1, 0, 0, 0, 1, 0 };
MetaOutput *output;
if (clutter_input_device_get_device_type (device) != CLUTTER_TABLET_DEVICE &&
clutter_input_device_get_device_type (device) != CLUTTER_TOUCHSCREEN_DEVICE)
return;
priv = meta_input_settings_get_instance_private (input_settings);
input_settings_class = META_INPUT_SETTINGS_GET_CLASS (input_settings);
/* If mapping is relative, the device can move on all displays */
if (clutter_input_device_get_device_type (device) != CLUTTER_TABLET_DEVICE ||
clutter_input_device_get_mapping_mode (device) ==
CLUTTER_INPUT_DEVICE_MAPPING_ABSOLUTE)
output = meta_input_settings_find_output (input_settings, settings, device);
else
output = NULL;
if (output)
meta_monitor_manager_get_monitor_matrix (priv->monitor_manager,
output, matrix);
input_settings_class->set_matrix (input_settings, device, matrix);
/* Ensure the keep-aspect mapping is updated */
update_tablet_keep_aspect (input_settings, settings, device);
}
static void
update_tablet_mapping (MetaInputSettings *input_settings,
GSettings *settings,
ClutterInputDevice *device)
{
MetaInputSettingsClass *input_settings_class;
GDesktopTabletMapping mapping;
if (clutter_input_device_get_device_type (device) != CLUTTER_TABLET_DEVICE)
return;
#ifdef HAVE_LIBWACOM
{
WacomDevice *wacom_device;
wacom_device = meta_input_settings_get_tablet_wacom_device (input_settings,
device);
/* Tablet mapping only makes sense on external tablets */
if (wacom_device &&
(libwacom_get_integration_flags (wacom_device) != WACOM_DEVICE_INTEGRATED_NONE))
return;
}
#endif
input_settings_class = META_INPUT_SETTINGS_GET_CLASS (input_settings);
mapping = g_settings_get_enum (settings, "mapping");
settings_device_set_uint_setting (input_settings, device,
input_settings_class->set_tablet_mapping,
mapping);
/* Relative mapping disables keep-aspect/display */
update_tablet_keep_aspect (input_settings, settings, device);
update_device_display (input_settings, settings, device);
}
static void
update_tablet_area (MetaInputSettings *input_settings,
GSettings *settings,
ClutterInputDevice *device)
{
MetaInputSettingsClass *input_settings_class;
GVariant *variant;
const gdouble *area;
gsize n_elems;
if (clutter_input_device_get_device_type (device) != CLUTTER_TABLET_DEVICE)
return;
#ifdef HAVE_LIBWACOM
{
WacomDevice *wacom_device;
wacom_device = meta_input_settings_get_tablet_wacom_device (input_settings,
device);
/* Tablet area only makes sense on system/display integrated tablets */
if (wacom_device &&
(libwacom_get_integration_flags (wacom_device) &
(WACOM_DEVICE_INTEGRATED_SYSTEM | WACOM_DEVICE_INTEGRATED_DISPLAY)) == 0)
return;
}
#endif
input_settings_class = META_INPUT_SETTINGS_GET_CLASS (input_settings);
variant = g_settings_get_value (settings, "area");
area = g_variant_get_fixed_array (variant, &n_elems, sizeof (gdouble));
if (n_elems == 4)
{
input_settings_class->set_tablet_area (input_settings, device,
area[0], area[1],
area[2], area[3]);
}
g_variant_unref (variant);
}
static void
update_tablet_left_handed (MetaInputSettings *input_settings,
GSettings *settings,
ClutterInputDevice *device)
{
MetaInputSettingsClass *input_settings_class;
gboolean enabled;
if (clutter_input_device_get_device_type (device) != CLUTTER_TABLET_DEVICE)
return;
#ifdef HAVE_LIBWACOM
{
WacomDevice *wacom_device;
wacom_device = meta_input_settings_get_tablet_wacom_device (input_settings,
device);
/* Left handed mode only makes sense on external tablets */
if (wacom_device &&
(libwacom_get_integration_flags (wacom_device) != WACOM_DEVICE_INTEGRATED_NONE))
return;
}
#endif
input_settings_class = META_INPUT_SETTINGS_GET_CLASS (input_settings);
enabled = g_settings_get_boolean (settings, "left-handed");
settings_device_set_bool_setting (input_settings, device,
input_settings_class->set_left_handed,
enabled);
}
static void
meta_input_settings_changed_cb (GSettings *settings,
const char *key,
gpointer user_data)
{
MetaInputSettings *input_settings = META_INPUT_SETTINGS (user_data);
MetaInputSettingsPrivate *priv = meta_input_settings_get_instance_private (input_settings);
if (settings == priv->mouse_settings)
{
if (strcmp (key, "left-handed") == 0)
update_mouse_left_handed (input_settings, NULL);
else if (strcmp (key, "speed") == 0)
update_device_speed (input_settings, NULL);
else if (strcmp (key, "natural-scroll") == 0)
update_device_natural_scroll (input_settings, NULL);
}
else if (settings == priv->touchpad_settings)
{
if (strcmp (key, "left-handed") == 0)
update_touchpad_left_handed (input_settings, NULL);
else if (strcmp (key, "speed") == 0)
update_device_speed (input_settings, NULL);
else if (strcmp (key, "natural-scroll") == 0)
update_device_natural_scroll (input_settings, NULL);
else if (strcmp (key, "tap-to-click") == 0)
update_touchpad_tap_enabled (input_settings, NULL);
else if (strcmp (key, "send-events") == 0)
update_touchpad_send_events (input_settings, NULL);
else if (strcmp (key, "edge-scrolling-enabled") == 0)
update_touchpad_edge_scroll (input_settings, NULL);
else if (strcmp (key, "click-method") == 0)
update_touchpad_click_method (input_settings, NULL);
}
else if (settings == priv->trackball_settings)
{
if (strcmp (key, "scroll-wheel-emulation-button") == 0)
update_trackball_scroll_button (input_settings, NULL);
}
else if (settings == priv->keyboard_settings)
{
if (strcmp (key, "repeat") == 0 ||
strcmp (key, "repeat-interval") == 0 ||
strcmp (key, "delay") == 0)
update_keyboard_repeat (input_settings);
}
}
static void
mapped_device_changed_cb (GSettings *settings,
const gchar *key,
DeviceMappingInfo *info)
{
if (strcmp (key, "display") == 0)
update_device_display (info->input_settings, settings, info->device);
else if (strcmp (key, "mapping") == 0)
update_tablet_mapping (info->input_settings, settings, info->device);
else if (strcmp (key, "area") == 0)
update_tablet_area (info->input_settings, settings, info->device);
else if (strcmp (key, "keep-aspect") == 0)
update_tablet_keep_aspect (info->input_settings, settings, info->device);
else if (strcmp (key, "left-handed") == 0)
update_tablet_left_handed (info->input_settings, settings, info->device);
}
static void
apply_mappable_device_settings (MetaInputSettings *input_settings,
DeviceMappingInfo *info)
{
update_device_display (input_settings, info->settings, info->device);
if (clutter_input_device_get_device_type (info->device) == CLUTTER_TABLET_DEVICE ||
clutter_input_device_get_device_type (info->device) == CLUTTER_PAD_DEVICE)
{
update_tablet_mapping (input_settings, info->settings, info->device);
update_tablet_area (input_settings, info->settings, info->device);
update_tablet_keep_aspect (input_settings, info->settings, info->device);
update_tablet_left_handed (input_settings, info->settings, info->device);
}
}
static GSettings *
lookup_device_settings (ClutterInputDevice *device)
{
const gchar *group, *schema, *vendor, *product;
ClutterInputDeviceType type;
GSettings *settings;
gchar *path;
type = clutter_input_device_get_device_type (device);
if (type == CLUTTER_TOUCHSCREEN_DEVICE)
{
group = "touchscreens";
schema = "org.gnome.desktop.peripherals.touchscreen";
}
else if (type == CLUTTER_TABLET_DEVICE ||
type == CLUTTER_PEN_DEVICE ||
type == CLUTTER_ERASER_DEVICE ||
type == CLUTTER_CURSOR_DEVICE ||
type == CLUTTER_PAD_DEVICE)
{
group = "tablets";
schema = "org.gnome.desktop.peripherals.tablet";
}
else
return NULL;
vendor = clutter_input_device_get_vendor_id (device);
product = clutter_input_device_get_product_id (device);
path = g_strdup_printf ("/org/gnome/desktop/peripherals/%s/%s:%s/",
group, vendor, product);
settings = g_settings_new_with_path (schema, path);
g_free (path);
return settings;
}
static void
tool_settings_cache_pressure_curve (ToolSettings *tool_settings)
{
GVariant *variant;
const gint32 *curve;
gsize n_elems;
if (clutter_input_device_tool_get_tool_type (tool_settings->tool) ==
CLUTTER_INPUT_DEVICE_TOOL_ERASER)
variant = g_settings_get_value (tool_settings->settings, "eraser-pressure-curve");
else
variant = g_settings_get_value (tool_settings->settings, "pressure-curve");
curve = g_variant_get_fixed_array (variant, &n_elems, sizeof (gint32));
if (n_elems == 4)
{
tool_settings->curve[0] = (gdouble) curve[0] / 100;
tool_settings->curve[1] = (gdouble) curve[1] / 100;
tool_settings->curve[2] = (gdouble) curve[2] / 100;
tool_settings->curve[3] = (gdouble) curve[3] / 100;
}
else
{
tool_settings->curve[0] = tool_settings->curve[1] = 0;
tool_settings->curve[2] = tool_settings->curve[3] = 1;
}
g_variant_unref (variant);
}
static void
tool_settings_changed_cb (GSettings *settings,
const gchar *key,
ToolSettings *tool_settings)
{
if (strcmp (key, "button-action") == 0)
tool_settings->button_action = g_settings_get_enum (settings, "button-action");
else if (strcmp (key, "secondary-button-action") == 0)
tool_settings->secondary_button_action = g_settings_get_enum (settings, "secondary-button-action");
else if (strcmp (key, "pressure-curve") == 0 &&
clutter_input_device_tool_get_tool_type (tool_settings->tool) !=
CLUTTER_INPUT_DEVICE_TOOL_ERASER)
tool_settings_cache_pressure_curve (tool_settings);
else if (strcmp (key, "eraser-pressure-curve") == 0 &&
clutter_input_device_tool_get_tool_type (tool_settings->tool) ==
CLUTTER_INPUT_DEVICE_TOOL_ERASER)
tool_settings_cache_pressure_curve (tool_settings);
}
static ToolSettings *
tool_settings_new (ClutterInputDeviceTool *tool,
const gchar *schema_path)
{
ToolSettings *tool_settings;
tool_settings = g_new0 (ToolSettings, 1);
tool_settings->tool = tool;
tool_settings->settings =
g_settings_new_with_path ("org.gnome.desktop.peripherals.tablet.stylus",
schema_path);
g_signal_connect (tool_settings->settings, "changed",
G_CALLBACK (tool_settings_changed_cb), tool_settings);
/* Initialize values */
tool_settings->button_action =
g_settings_get_enum (tool_settings->settings, "button-action");
tool_settings->secondary_button_action =
g_settings_get_enum (tool_settings->settings, "secondary-button-action");
tool_settings_cache_pressure_curve (tool_settings);
return tool_settings;
}
static void
tool_settings_free (ToolSettings *tool_settings)
{
g_object_unref (tool_settings->settings);
g_free (tool_settings);
}
static ToolSettings *
lookup_tool_settings (ClutterInputDeviceTool *tool,
ClutterInputDevice *device)
{
ToolSettings *tool_settings;
guint64 serial;
gchar *path;
tool_settings = g_object_get_qdata (G_OBJECT (tool), quark_tool_settings);
if (tool_settings)
return tool_settings;
serial = clutter_input_device_tool_get_serial (tool);
if (serial == 0)
{
path = g_strdup_printf ("/org/gnome/desktop/peripherals/stylus/default-%s:%s/",
clutter_input_device_get_vendor_id (device),
clutter_input_device_get_product_id (device));
}
else
{
path = g_strdup_printf ("/org/gnome/desktop/peripherals/stylus/%lx/", serial);
}
tool_settings = tool_settings_new (tool, path);
g_object_set_qdata_full (G_OBJECT (tool), quark_tool_settings, tool_settings,
(GDestroyNotify) tool_settings_free);
g_free (path);
return tool_settings;
}
static GSettings *
lookup_pad_button_settings (ClutterInputDevice *device,
guint button)
{
const gchar *vendor, *product;
GSettings *settings;
gchar *path;
vendor = clutter_input_device_get_vendor_id (device);
product = clutter_input_device_get_product_id (device);
path = g_strdup_printf ("/org/gnome/desktop/peripherals/tablets/%s:%s/button%c/",
vendor, product, 'A' + button);
settings = g_settings_new_with_path ("org.gnome.desktop.peripherals.tablet.pad-button",
path);
g_free (path);
return settings;
}
static void
monitors_changed_cb (MetaMonitorManager *monitor_manager,
MetaInputSettings *input_settings)
{
MetaInputSettingsPrivate *priv;
ClutterInputDevice *device;
DeviceMappingInfo *info;
GHashTableIter iter;
priv = meta_input_settings_get_instance_private (input_settings);
g_hash_table_iter_init (&iter, priv->mappable_devices);
while (g_hash_table_iter_next (&iter, (gpointer *) &device,
(gpointer *) &info))
update_device_display (input_settings, info->settings, device);
}
static void
device_mapping_info_free (DeviceMappingInfo *info)
{
#ifdef HAVE_LIBWACOM
if (info->wacom_device)
libwacom_destroy (info->wacom_device);
#endif
g_object_unref (info->settings);
g_slice_free (DeviceMappingInfo, info);
}
static gboolean
check_add_mappable_device (MetaInputSettings *input_settings,
ClutterInputDevice *device)
{
MetaInputSettingsPrivate *priv;
DeviceMappingInfo *info;
GSettings *settings;
settings = lookup_device_settings (device);
if (!settings)
return FALSE;
priv = meta_input_settings_get_instance_private (input_settings);
info = g_slice_new0 (DeviceMappingInfo);
info->input_settings = input_settings;
info->device = device;
info->settings = settings;
#ifdef HAVE_LIBWACOM
if (clutter_input_device_get_device_type (device) == CLUTTER_TABLET_DEVICE ||
clutter_input_device_get_device_type (device) == CLUTTER_PAD_DEVICE)
{
WacomError *error = libwacom_error_new ();
info->wacom_device = libwacom_new_from_path (priv->wacom_db,
clutter_input_device_get_device_node (device),
WFALLBACK_NONE, error);
if (!info->wacom_device)
{
g_warning ("Could not get tablet information for '%s': %s",
clutter_input_device_get_device_name (device),
libwacom_error_get_message (error));
}
libwacom_error_free (&error);
}
#endif
g_signal_connect (settings, "changed",
G_CALLBACK (mapped_device_changed_cb), info);
g_hash_table_insert (priv->mappable_devices, device, info);
apply_mappable_device_settings (input_settings, info);
return TRUE;
}
static void
apply_device_settings (MetaInputSettings *input_settings,
ClutterInputDevice *device)
{
update_mouse_left_handed (input_settings, device);
update_device_speed (input_settings, device);
update_device_natural_scroll (input_settings, device);
update_touchpad_left_handed (input_settings, device);
update_device_speed (input_settings, device);
update_device_natural_scroll (input_settings, device);
update_touchpad_tap_enabled (input_settings, device);
update_touchpad_send_events (input_settings, device);
update_touchpad_edge_scroll (input_settings, device);
update_touchpad_click_method (input_settings, device);
update_trackball_scroll_button (input_settings, device);
}
static void
meta_input_settings_device_added (ClutterDeviceManager *device_manager,
ClutterInputDevice *device,
MetaInputSettings *input_settings)
{
if (clutter_input_device_get_device_mode (device) == CLUTTER_INPUT_MODE_MASTER)
return;
apply_device_settings (input_settings, device);
check_add_mappable_device (input_settings, device);
}
static void
meta_input_settings_device_removed (ClutterDeviceManager *device_manager,
ClutterInputDevice *device,
MetaInputSettings *input_settings)
{
MetaInputSettingsPrivate *priv;
priv = meta_input_settings_get_instance_private (input_settings);
g_hash_table_remove (priv->mappable_devices, device);
}
static void
check_mappable_devices (MetaInputSettings *input_settings)
{
MetaInputSettingsPrivate *priv;
const GSList *devices, *l;
priv = meta_input_settings_get_instance_private (input_settings);
devices = clutter_device_manager_peek_devices (priv->device_manager);
for (l = devices; l; l = l->next)
{
ClutterInputDevice *device = l->data;
if (clutter_input_device_get_device_mode (device) == CLUTTER_INPUT_MODE_MASTER)
continue;
check_add_mappable_device (input_settings, device);
}
}
static void
meta_input_settings_constructed (GObject *object)
{
MetaInputSettings *input_settings = META_INPUT_SETTINGS (object);
apply_device_settings (input_settings, NULL);
update_keyboard_repeat (input_settings);
check_mappable_devices (input_settings);
}
static void
meta_input_settings_class_init (MetaInputSettingsClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->dispose = meta_input_settings_dispose;
object_class->constructed = meta_input_settings_constructed;
quark_tool_settings =
g_quark_from_static_string ("meta-input-settings-tool-settings");
}
static void
meta_input_settings_init (MetaInputSettings *settings)
{
MetaInputSettingsPrivate *priv;
priv = meta_input_settings_get_instance_private (settings);
priv->device_manager = clutter_device_manager_get_default ();
g_signal_connect (priv->device_manager, "device-added",
G_CALLBACK (meta_input_settings_device_added), settings);
g_signal_connect (priv->device_manager, "device-removed",
G_CALLBACK (meta_input_settings_device_removed), settings);
priv->mouse_settings = g_settings_new ("org.gnome.desktop.peripherals.mouse");
g_signal_connect (priv->mouse_settings, "changed",
G_CALLBACK (meta_input_settings_changed_cb), settings);
priv->touchpad_settings = g_settings_new ("org.gnome.desktop.peripherals.touchpad");
g_signal_connect (priv->touchpad_settings, "changed",
G_CALLBACK (meta_input_settings_changed_cb), settings);
priv->trackball_settings = g_settings_new ("org.gnome.desktop.peripherals.trackball");
g_signal_connect (priv->trackball_settings, "changed",
G_CALLBACK (meta_input_settings_changed_cb), settings);
priv->keyboard_settings = g_settings_new ("org.gnome.desktop.peripherals.keyboard");
g_signal_connect (priv->keyboard_settings, "changed",
G_CALLBACK (meta_input_settings_changed_cb), settings);
priv->mappable_devices =
g_hash_table_new_full (NULL, NULL, NULL, (GDestroyNotify) device_mapping_info_free);
priv->monitor_manager = g_object_ref (meta_monitor_manager_get ());
g_signal_connect (priv->monitor_manager, "monitors-changed",
G_CALLBACK (monitors_changed_cb), settings);
priv->wacom_db = libwacom_database_new ();
if (!priv->wacom_db)
{
g_warning ("Could not create database of Wacom devices, "
"expect tablets to misbehave");
}
}
MetaInputSettings *
meta_input_settings_create (void)
{
#ifdef HAVE_NATIVE_BACKEND
MetaBackend *backend;
backend = meta_get_backend ();
if (META_IS_BACKEND_NATIVE (backend))
return g_object_new (META_TYPE_INPUT_SETTINGS_NATIVE, NULL);
#endif
if (!meta_is_wayland_compositor ())
return g_object_new (META_TYPE_INPUT_SETTINGS_X11, NULL);
return NULL;
}
GSettings *
meta_input_settings_get_tablet_settings (MetaInputSettings *settings,
ClutterInputDevice *device)
{
MetaInputSettingsPrivate *priv;
DeviceMappingInfo *info;
g_return_val_if_fail (META_IS_INPUT_SETTINGS (settings), NULL);
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), NULL);
priv = meta_input_settings_get_instance_private (settings);
info = g_hash_table_lookup (priv->mappable_devices, device);
return info ? g_object_ref (info->settings) : NULL;
}
MetaMonitorInfo *
meta_input_settings_get_tablet_monitor_info (MetaInputSettings *settings,
ClutterInputDevice *device)
{
MetaInputSettingsPrivate *priv;
DeviceMappingInfo *info;
MetaOutput *output;
g_return_val_if_fail (META_IS_INPUT_SETTINGS (settings), NULL);
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), NULL);
priv = meta_input_settings_get_instance_private (settings);
info = g_hash_table_lookup (priv->mappable_devices, device);
if (!info)
return NULL;
output = meta_input_settings_find_output (settings, info->settings, device);
if (output && output->crtc)
return output->crtc->logical_monitor;
return NULL;
}
GDesktopTabletMapping
meta_input_settings_get_tablet_mapping (MetaInputSettings *settings,
ClutterInputDevice *device)
{
MetaInputSettingsPrivate *priv;
DeviceMappingInfo *info;
g_return_val_if_fail (META_IS_INPUT_SETTINGS (settings),
G_DESKTOP_TABLET_MAPPING_ABSOLUTE);
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device),
G_DESKTOP_TABLET_MAPPING_ABSOLUTE);
priv = meta_input_settings_get_instance_private (settings);
info = g_hash_table_lookup (priv->mappable_devices, device);
g_return_val_if_fail (info != NULL, G_DESKTOP_TABLET_MAPPING_ABSOLUTE);
return g_settings_get_enum (info->settings, "mapping");
}
GDesktopStylusButtonAction
meta_input_settings_get_stylus_button_action (MetaInputSettings *input_settings,
ClutterInputDeviceTool *tool,
ClutterInputDevice *current_tablet,
guint button)
{
ToolSettings *tool_settings;
g_return_val_if_fail (META_IS_INPUT_SETTINGS (input_settings),
G_DESKTOP_STYLUS_BUTTON_ACTION_DEFAULT);
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE_TOOL (tool),
G_DESKTOP_STYLUS_BUTTON_ACTION_DEFAULT);
tool_settings = lookup_tool_settings (tool, current_tablet);
if (button == 2)
return tool_settings->button_action;
else if (button == 3)
return tool_settings->secondary_button_action;
else
return G_DESKTOP_STYLUS_BUTTON_ACTION_DEFAULT;
}
static GDesktopPadButtonAction
meta_input_settings_get_pad_button_action (MetaInputSettings *input_settings,
ClutterInputDevice *pad,
guint button)
{
GDesktopPadButtonAction action;
GSettings *settings;
g_return_val_if_fail (META_IS_INPUT_SETTINGS (input_settings),
G_DESKTOP_PAD_BUTTON_ACTION_NONE);
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (pad),
G_DESKTOP_PAD_BUTTON_ACTION_NONE);
settings = lookup_pad_button_settings (pad, button);
action = g_settings_get_enum (settings, "action");
g_object_unref (settings);
return action;
}
#ifdef HAVE_LIBWACOM
WacomDevice *
meta_input_settings_get_tablet_wacom_device (MetaInputSettings *settings,
ClutterInputDevice *device)
{
MetaInputSettingsPrivate *priv;
DeviceMappingInfo *info;
g_return_val_if_fail (META_IS_INPUT_SETTINGS (settings), NULL);
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), NULL);
priv = meta_input_settings_get_instance_private (settings);
info = g_hash_table_lookup (priv->mappable_devices, device);
g_return_val_if_fail (info != NULL, NULL);
return info->wacom_device;
}
#endif /* HAVE_LIBWACOM */
static gboolean
cycle_outputs (MetaInputSettings *settings,
MetaOutput *current_output,
MetaOutput **next_output)
{
MetaInputSettingsPrivate *priv;
MetaOutput *next, *outputs;
guint n_outputs, current, i;
priv = meta_input_settings_get_instance_private (settings);
outputs = meta_monitor_manager_get_outputs (priv->monitor_manager,
&n_outputs);
if (n_outputs <= 1)
return FALSE;
/* We cycle between:
* - the span of all monitors (current_output = NULL)
* - each monitor individually.
*/
if (!current_output)
{
next = &outputs[0];
}
else
{
for (i = 0; i < n_outputs; i++)
{
if (current_output != &outputs[i])
continue;
current = i;
break;
}
g_assert (i < n_outputs);
if (current == n_outputs - 1)
next = NULL;
else
next = &outputs[current + 1];
}
*next_output = next;
return TRUE;
}
static void
meta_input_settings_cycle_tablet_output (MetaInputSettings *input_settings,
ClutterInputDevice *device)
{
MetaInputSettingsPrivate *priv;
DeviceMappingInfo *info;
MetaOutput *output;
const gchar *edid[4] = { 0 };
g_return_if_fail (META_IS_INPUT_SETTINGS (input_settings));
g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));
g_return_if_fail (clutter_input_device_get_device_type (device) == CLUTTER_TABLET_DEVICE ||
clutter_input_device_get_device_type (device) == CLUTTER_PAD_DEVICE);
priv = meta_input_settings_get_instance_private (input_settings);
info = g_hash_table_lookup (priv->mappable_devices, device);
g_return_if_fail (info != NULL);
#ifdef HAVE_LIBWACOM
/* Output rotation only makes sense on external tablets */
if (info->wacom_device &&
(libwacom_get_integration_flags (info->wacom_device) != WACOM_DEVICE_INTEGRATED_NONE))
return;
#endif
output = meta_input_settings_find_output (input_settings,
info->settings, device);
if (!cycle_outputs (input_settings, output, &output))
return;
edid[0] = output ? output->vendor : "";
edid[1] = output ? output->product : "";
edid[2] = output ? output->serial : "";
g_settings_set_strv (info->settings, "display", edid);
}
static gdouble
calculate_bezier_position (gdouble pos,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2)
{
gdouble int1_y, int2_y;
pos = CLAMP (pos, 0, 1);
/* Intersection between 0,0 and x1,y1 */
int1_y = pos * y1;
/* Intersection between x2,y2 and 1,1 */
int2_y = (pos * (1 - y2)) + y2;
/* Find the new position in the line traced by the previous points */
return (pos * (int2_y - int1_y)) + int1_y;
}
gdouble
meta_input_settings_translate_tablet_tool_pressure (MetaInputSettings *input_settings,
ClutterInputDeviceTool *tool,
ClutterInputDevice *current_tablet,
gdouble pressure)
{
ToolSettings *tool_settings;
pressure = CLAMP (pressure, 0, 1);
g_return_val_if_fail (META_IS_INPUT_SETTINGS (input_settings), pressure);
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE_TOOL (tool), pressure);
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (current_tablet), pressure);
tool_settings = lookup_tool_settings (tool, current_tablet);
pressure = calculate_bezier_position (pressure,
tool_settings->curve[0],
tool_settings->curve[1],
tool_settings->curve[2],
tool_settings->curve[3]);
return pressure;
}
gboolean
meta_input_settings_is_pad_button_grabbed (MetaInputSettings *input_settings,
ClutterInputDevice *pad,
guint button)
{
g_return_val_if_fail (META_IS_INPUT_SETTINGS (input_settings), FALSE);
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (pad), FALSE);
g_return_val_if_fail (clutter_input_device_get_device_type (pad) ==
CLUTTER_PAD_DEVICE, FALSE);
return (meta_input_settings_get_pad_button_action (input_settings, pad, button) !=
G_DESKTOP_PAD_BUTTON_ACTION_NONE);
}
gboolean
meta_input_settings_handle_pad_button (MetaInputSettings *input_settings,
ClutterInputDevice *pad,
gboolean is_press,
guint button)
{
GDesktopPadButtonAction action;
g_return_val_if_fail (META_IS_INPUT_SETTINGS (input_settings), FALSE);
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (pad), FALSE);
g_return_val_if_fail (clutter_input_device_get_device_type (pad) ==
CLUTTER_PAD_DEVICE, FALSE);
action = meta_input_settings_get_pad_button_action (input_settings, pad, button);
switch (action)
{
case G_DESKTOP_PAD_BUTTON_ACTION_SWITCH_MONITOR:
if (is_press)
meta_input_settings_cycle_tablet_output (input_settings, pad);
return TRUE;
case G_DESKTOP_PAD_BUTTON_ACTION_HELP:
if (is_press)
meta_display_request_pad_osd (meta_get_display (), pad, FALSE);
return TRUE;
case G_DESKTOP_PAD_BUTTON_ACTION_KEYBINDING:
case G_DESKTOP_PAD_BUTTON_ACTION_NONE:
default:
return FALSE;
}
}
gchar *
meta_input_settings_get_pad_button_action_label (MetaInputSettings *input_settings,
ClutterInputDevice *pad,
guint button)
{
GDesktopPadButtonAction action;
g_return_val_if_fail (META_IS_INPUT_SETTINGS (input_settings), NULL);
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (pad), NULL);
g_return_val_if_fail (clutter_input_device_get_device_type (pad) ==
CLUTTER_PAD_DEVICE, NULL);
action = meta_input_settings_get_pad_button_action (input_settings, pad, button);
switch (action)
{
case G_DESKTOP_PAD_BUTTON_ACTION_KEYBINDING:
{
GSettings *settings;
gchar *accel;
settings = lookup_pad_button_settings (pad, button);
accel = g_settings_get_string (settings, "keybinding");
g_object_unref (settings);
return accel;
}
case G_DESKTOP_PAD_BUTTON_ACTION_SWITCH_MONITOR:
return g_strdup (_("Switch monitor"));
case G_DESKTOP_PAD_BUTTON_ACTION_HELP:
return g_strdup (_("Show on-screen help"));
case G_DESKTOP_PAD_BUTTON_ACTION_NONE:
default:
return NULL;
}
}