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mutter/src/backends/x11/meta-input-device-x11.c

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/*
* Copyright © 2011 Intel Corp.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Emmanuele Bassi <ebassi@linux.intel.com>
*/
#include "config.h"
#include <X11/extensions/XInput2.h>
#include "clutter/clutter-mutter.h"
#include "clutter/x11/clutter-x11.h"
#include "backends/x11/meta-input-device-x11.h"
struct _MetaInputDeviceX11
{
ClutterInputDevice device;
int32_t device_id;
ClutterInputDeviceTool *current_tool;
int inhibit_pointer_query_timer;
gboolean query_status;
float current_x;
float current_y;
#ifdef HAVE_LIBWACOM
WacomDevice *wacom_device;
GArray *group_modes;
#endif
};
struct _MetaInputDeviceX11Class
{
ClutterInputDeviceClass device_class;
};
#define N_BUTTONS 5
G_DEFINE_TYPE (MetaInputDeviceX11,
meta_input_device_x11,
CLUTTER_TYPE_INPUT_DEVICE)
static void
meta_input_device_x11_constructed (GObject *object)
{
MetaInputDeviceX11 *device_xi2 = META_INPUT_DEVICE_X11 (object);
g_object_get (object, "id", &device_xi2->device_id, NULL);
if (G_OBJECT_CLASS (meta_input_device_x11_parent_class)->constructed)
G_OBJECT_CLASS (meta_input_device_x11_parent_class)->constructed (object);
#ifdef HAVE_LIBWACOM
if (clutter_input_device_get_device_type (CLUTTER_INPUT_DEVICE (object)) == CLUTTER_PAD_DEVICE)
{
device_xi2->group_modes = g_array_new (FALSE, TRUE, sizeof (uint32_t));
g_array_set_size (device_xi2->group_modes,
clutter_input_device_get_n_mode_groups (CLUTTER_INPUT_DEVICE (object)));
}
#endif
}
static gboolean
meta_input_device_x11_keycode_to_evdev (ClutterInputDevice *device,
uint32_t hardware_keycode,
uint32_t *evdev_keycode)
{
/* When using evdev under X11 the hardware keycodes are the evdev
keycodes plus 8. I haven't been able to find any documentation to
know what the +8 is for. FIXME: This should probably verify that
X server is using evdev. */
*evdev_keycode = hardware_keycode - 8;
return TRUE;
}
static gboolean
meta_input_device_x11_is_grouped (ClutterInputDevice *device,
ClutterInputDevice *other_device)
{
return FALSE;
}
static void
meta_input_device_x11_finalize (GObject *object)
{
#ifdef HAVE_LIBWACOM
MetaInputDeviceX11 *device_xi2 = META_INPUT_DEVICE_X11 (object);
if (device_xi2->wacom_device)
libwacom_destroy (device_xi2->wacom_device);
if (device_xi2->group_modes)
g_array_unref (device_xi2->group_modes);
if (device_xi2->inhibit_pointer_query_timer)
g_source_remove (device_xi2->inhibit_pointer_query_timer);
#endif
G_OBJECT_CLASS (meta_input_device_x11_parent_class)->finalize (object);
}
static int
meta_input_device_x11_get_group_n_modes (ClutterInputDevice *device,
int group)
{
#ifdef HAVE_LIBWACOM
MetaInputDeviceX11 *device_xi2 = META_INPUT_DEVICE_X11 (device);
if (device_xi2->wacom_device)
{
if (group == 0)
{
if (libwacom_has_ring (device_xi2->wacom_device))
return libwacom_get_ring_num_modes (device_xi2->wacom_device);
else if (libwacom_get_num_strips (device_xi2->wacom_device) >= 1)
return libwacom_get_strips_num_modes (device_xi2->wacom_device);
}
else if (group == 1)
{
if (libwacom_has_ring2 (device_xi2->wacom_device))
return libwacom_get_ring2_num_modes (device_xi2->wacom_device);
else if (libwacom_get_num_strips (device_xi2->wacom_device) >= 2)
return libwacom_get_strips_num_modes (device_xi2->wacom_device);
}
}
#endif
return -1;
}
#ifdef HAVE_LIBWACOM
static int
meta_input_device_x11_get_button_group (ClutterInputDevice *device,
uint32_t button)
{
MetaInputDeviceX11 *device_xi2 = META_INPUT_DEVICE_X11 (device);
if (device_xi2->wacom_device)
{
if (button >= libwacom_get_num_buttons (device_xi2->wacom_device))
return -1;
return libwacom_get_button_led_group (device_xi2->wacom_device,
'A' + button);
}
else
return -1;
}
#endif
static gboolean
meta_input_device_x11_is_mode_switch_button (ClutterInputDevice *device,
uint32_t group,
uint32_t button)
{
int button_group = -1;
#ifdef HAVE_LIBWACOM
button_group = meta_input_device_x11_get_button_group (device, button);
#endif
return button_group == (int) group;
}
static void
meta_input_device_x11_class_init (MetaInputDeviceX11Class *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterInputDeviceClass *device_class = CLUTTER_INPUT_DEVICE_CLASS (klass);
gobject_class->constructed = meta_input_device_x11_constructed;
gobject_class->finalize = meta_input_device_x11_finalize;
device_class->keycode_to_evdev = meta_input_device_x11_keycode_to_evdev;
device_class->is_grouped = meta_input_device_x11_is_grouped;
device_class->get_group_n_modes = meta_input_device_x11_get_group_n_modes;
device_class->is_mode_switch_button = meta_input_device_x11_is_mode_switch_button;
}
static void
meta_input_device_x11_init (MetaInputDeviceX11 *self)
{
}
static ClutterModifierType
get_modifier_for_button (int i)
{
switch (i)
{
case 1:
return CLUTTER_BUTTON1_MASK;
case 2:
return CLUTTER_BUTTON2_MASK;
case 3:
return CLUTTER_BUTTON3_MASK;
case 4:
return CLUTTER_BUTTON4_MASK;
case 5:
return CLUTTER_BUTTON5_MASK;
default:
return 0;
}
}
void
meta_input_device_x11_translate_state (ClutterEvent *event,
XIModifierState *modifiers_state,
XIButtonState *buttons_state,
XIGroupState *group_state)
{
uint32_t button = 0;
uint32_t base = 0;
uint32_t latched = 0;
uint32_t locked = 0;
uint32_t effective;
if (modifiers_state)
{
base = (uint32_t) modifiers_state->base;
latched = (uint32_t) modifiers_state->latched;
locked = (uint32_t) modifiers_state->locked;
}
if (buttons_state)
{
int len, i;
len = MIN (N_BUTTONS, buttons_state->mask_len * 8);
for (i = 0; i < len; i++)
{
if (!XIMaskIsSet (buttons_state->mask, i))
continue;
button |= get_modifier_for_button (i);
}
}
/* The XIButtonState sent in the event specifies the
* state of the buttons before the event. In order to
* get the current state of the buttons, we need to
* filter out the current button.
*/
switch (event->type)
{
case CLUTTER_BUTTON_PRESS:
button |= (get_modifier_for_button (event->button.button));
break;
case CLUTTER_BUTTON_RELEASE:
button &= ~(get_modifier_for_button (event->button.button));
break;
default:
break;
}
effective = button | base | latched | locked;
if (group_state)
effective |= (group_state->effective) << 13;
_clutter_event_set_state_full (event, button, base, latched, locked, effective);
}
void
meta_input_device_x11_update_tool (ClutterInputDevice *device,
ClutterInputDeviceTool *tool)
{
MetaInputDeviceX11 *device_xi2 = META_INPUT_DEVICE_X11 (device);
g_set_object (&device_xi2->current_tool, tool);
}
ClutterInputDeviceTool *
meta_input_device_x11_get_current_tool (ClutterInputDevice *device)
{
MetaInputDeviceX11 *device_xi2 = META_INPUT_DEVICE_X11 (device);
return device_xi2->current_tool;
}
static gboolean
meta_input_device_x11_query_pointer_location (MetaInputDeviceX11 *device_xi2)
{
Window xroot_window, xchild_window;
double xroot_x, xroot_y, xwin_x, xwin_y;
XIButtonState button_state;
XIModifierState mod_state;
XIGroupState group_state;
int result;
clutter_x11_trap_x_errors ();
result = XIQueryPointer (clutter_x11_get_default_display (),
device_xi2->device_id,
clutter_x11_get_root_window (),
&xroot_window,
&xchild_window,
&xroot_x, &xroot_y,
&xwin_x, &xwin_y,
&button_state,
&mod_state,
&group_state);
clutter_x11_untrap_x_errors ();
if (!result)
return FALSE;
device_xi2->current_x = (float) xroot_x;
device_xi2->current_y = (float) xroot_y;
return TRUE;
}
static gboolean
clear_inhibit_pointer_query_cb (gpointer data)
{
MetaInputDeviceX11 *device_xi2 = META_INPUT_DEVICE_X11 (data);
device_xi2->inhibit_pointer_query_timer = 0;
return G_SOURCE_REMOVE;
}
gboolean
meta_input_device_x11_get_pointer_location (ClutterInputDevice *device,
float *x,
float *y)
{
MetaInputDeviceX11 *device_xi2 = META_INPUT_DEVICE_X11 (device);
g_return_val_if_fail (META_IS_INPUT_DEVICE_X11 (device), FALSE);
g_return_val_if_fail (device->device_type == CLUTTER_POINTER_DEVICE, FALSE);
/* Throttle XServer queries and roundtrips using an idle timeout */
if (device_xi2->inhibit_pointer_query_timer == 0)
{
device_xi2->query_status =
meta_input_device_x11_query_pointer_location (device_xi2);
device_xi2->inhibit_pointer_query_timer =
clutter_threads_add_idle (clear_inhibit_pointer_query_cb, device_xi2);
}
*x = device_xi2->current_x;
*y = device_xi2->current_y;
return device_xi2->query_status;
}
#ifdef HAVE_LIBWACOM
void
meta_input_device_x11_ensure_wacom_info (ClutterInputDevice *device,
WacomDeviceDatabase *wacom_db)
{
MetaInputDeviceX11 *device_xi2 = META_INPUT_DEVICE_X11 (device);
const gchar *node_path;
node_path = clutter_input_device_get_device_node (device);
device_xi2->wacom_device = libwacom_new_from_path (wacom_db, node_path,
WFALLBACK_NONE, NULL);
}
uint32_t
meta_input_device_x11_get_pad_group_mode (ClutterInputDevice *device,
uint32_t group)
{
MetaInputDeviceX11 *device_xi2 = META_INPUT_DEVICE_X11 (device);
if (group >= device_xi2->group_modes->len)
return 0;
return g_array_index (device_xi2->group_modes, uint32_t, group);
}
void
meta_input_device_x11_update_pad_state (ClutterInputDevice *device,
uint32_t button,
uint32_t state,
uint32_t *group,
uint32_t *mode)
{
MetaInputDeviceX11 *device_xi2 = META_INPUT_DEVICE_X11 (device);
uint32_t button_group, *group_mode;
gboolean is_mode_switch = FALSE;
button_group = meta_input_device_x11_get_button_group (device, button);
is_mode_switch = button_group >= 0;
/* Assign all non-mode-switch buttons to group 0 so far */
button_group = MAX (0, button_group);
if (button_group >= device_xi2->group_modes->len)
return;
group_mode = &g_array_index (device_xi2->group_modes, uint32_t, button_group);
if (is_mode_switch && state)
{
uint32_t next, n_modes;
n_modes = clutter_input_device_get_group_n_modes (device, button_group);
next = (*group_mode + 1) % n_modes;
*group_mode = next;
}
if (group)
*group = button_group;
if (mode)
*mode = *group_mode;
}
#endif
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