mutter/clutter/x11/clutter-input-device-core-x11.c

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright © 2010, 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 "clutter-input-device-core-x11.h"
#include "clutter-debug.h"
#include "clutter-device-manager-private.h"
#include "clutter-private.h"
#include "clutter-stage-private.h"
#include "clutter-backend-x11.h"
#include "clutter-stage-x11.h"
#ifdef HAVE_XINPUT
#include <X11/extensions/XInput.h>
#endif
#define MAX_DEVICE_CLASSES 13
typedef struct _ClutterInputDeviceClass ClutterInputDeviceX11Class;
/* a specific X11 input device */
struct _ClutterInputDeviceX11
{
ClutterInputDevice device;
#ifdef HAVE_XINPUT
XDevice *xdevice;
XEventClass event_classes[MAX_DEVICE_CLASSES];
int num_classes;
int button_press_type;
int button_release_type;
int motion_notify_type;
int state_notify_type;
int key_press_type;
int key_release_type;
#endif /* HAVE_XINPUT */
gint *axis_data;
};
#define clutter_input_device_x11_get_type _clutter_input_device_x11_get_type
G_DEFINE_TYPE (ClutterInputDeviceX11,
clutter_input_device_x11,
CLUTTER_TYPE_INPUT_DEVICE);
static void
clutter_input_device_x11_select_stage_events (ClutterInputDevice *device,
ClutterStage *stage,
gint event_mask)
{
#if HAVE_XINPUT
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (device->backend);
ClutterInputDeviceX11 *device_x11;
ClutterStageX11 *stage_x11;
XEventClass class;
gint i;
device_x11 = CLUTTER_INPUT_DEVICE_X11 (device);
stage_x11 = CLUTTER_STAGE_X11 (_clutter_stage_get_window (stage));
i = 0;
if (event_mask & ButtonPressMask)
{
DeviceButtonPress (device_x11->xdevice,
device_x11->button_press_type,
class);
if (class != 0)
device_x11->event_classes[i++] = class;
DeviceButtonPressGrab (device_x11->xdevice, 0, class);
if (class != 0)
device_x11->event_classes[i++] = class;
}
if (event_mask & ButtonReleaseMask)
{
DeviceButtonRelease (device_x11->xdevice,
device_x11->button_release_type,
class);
if (class != 0)
device_x11->event_classes[i++] = class;
}
if (event_mask & PointerMotionMask)
{
DeviceMotionNotify (device_x11->xdevice,
device_x11->motion_notify_type,
class);
if (class != 0)
device_x11->event_classes[i++] = class;
DeviceStateNotify (device_x11->xdevice,
device_x11->state_notify_type,
class);
if (class != 0)
device_x11->event_classes[i++] = class;
}
if (event_mask & KeyPressMask)
{
DeviceKeyPress (device_x11->xdevice,
device_x11->key_press_type,
class);
if (class != 0)
device_x11->event_classes[i++] = class;
}
if (event_mask & KeyReleaseMask)
{
DeviceKeyRelease (device_x11->xdevice,
device_x11->key_release_type,
class);
if (class != 0)
device_x11->event_classes[i++] = class;
}
device_x11->num_classes = i;
XSelectExtensionEvent (backend_x11->xdpy,
stage_x11->xwin,
device_x11->event_classes,
device_x11->num_classes);
#endif /* HAVE_XINPUT */
}
static void
clutter_input_device_x11_dispose (GObject *gobject)
{
ClutterInputDeviceX11 *device_x11 = CLUTTER_INPUT_DEVICE_X11 (gobject);
#ifdef HAVE_XINPUT
if (device_x11->xdevice)
{
ClutterInputDevice *device = CLUTTER_INPUT_DEVICE (gobject);
ClutterBackendX11 *backend_x11 = CLUTTER_BACKEND_X11 (device->backend);
XCloseDevice (backend_x11->xdpy, device_x11->xdevice);
device_x11->xdevice = NULL;
}
#endif /* HAVE_XINPUT */
g_free (device_x11->axis_data);
G_OBJECT_CLASS (clutter_input_device_x11_parent_class)->dispose (gobject);
}
static void
clutter_input_device_x11_constructed (GObject *gobject)
{
#ifdef HAVE_XINPUT
ClutterInputDeviceX11 *device_x11 = CLUTTER_INPUT_DEVICE_X11 (gobject);
ClutterInputDevice *device = CLUTTER_INPUT_DEVICE (gobject);
ClutterBackendX11 *backend_x11;
backend_x11 = CLUTTER_BACKEND_X11 (device->backend);
clutter_x11_trap_x_errors ();
device_x11->xdevice = XOpenDevice (backend_x11->xdpy, device->id);
if (clutter_x11_untrap_x_errors ())
{
g_warning ("Device '%s' cannot be opened",
clutter_input_device_get_device_name (device));
}
#endif /* HAVE_XINPUT */
if (G_OBJECT_CLASS (clutter_input_device_x11_parent_class)->constructed)
G_OBJECT_CLASS (clutter_input_device_x11_parent_class)->constructed (gobject);
}
static void
clutter_input_device_x11_class_init (ClutterInputDeviceX11Class *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterInputDeviceClass *device_class = CLUTTER_INPUT_DEVICE_CLASS (klass);
gobject_class->constructed = clutter_input_device_x11_constructed;
gobject_class->dispose = clutter_input_device_x11_dispose;
device_class->select_stage_events = clutter_input_device_x11_select_stage_events;
}
static void
clutter_input_device_x11_init (ClutterInputDeviceX11 *self)
{
}
#ifdef HAVE_XINPUT
static void
update_axes (ClutterInputDeviceX11 *device_x11,
guint n_axes,
gint first_axis,
gint *axes_data)
{
ClutterInputDevice *device = CLUTTER_INPUT_DEVICE (device_x11);
gint i;
if (device_x11->axis_data == NULL)
{
device_x11->axis_data =
g_new0 (gint, clutter_input_device_get_n_axes (device));
}
for (i = 0; i < n_axes; i++)
device_x11->axis_data[first_axis + i] = axes_data[i];
}
static gdouble *
translate_axes (ClutterInputDeviceX11 *device_x11,
ClutterStageX11 *stage_x11,
gfloat *event_x,
gfloat *event_y)
{
ClutterInputDevice *device = CLUTTER_INPUT_DEVICE (device_x11);
gint root_x, root_y;
gint n_axes, i;
gdouble x, y;
gdouble *retval;
if (!_clutter_stage_x11_get_root_coords (stage_x11, &root_x, &root_y))
return NULL;
x = y = 0.0f;
n_axes = clutter_input_device_get_n_axes (device);
retval = g_new0 (gdouble, n_axes);
for (i = 0; i < n_axes; i++)
{
ClutterInputAxis axis;
axis = _clutter_input_device_get_axis (device, i);
switch (axis)
{
case CLUTTER_INPUT_AXIS_X:
case CLUTTER_INPUT_AXIS_Y:
_clutter_x11_input_device_translate_screen_coord (device,
root_x, root_y,
i,
device_x11->axis_data[i],
&retval[i]);
if (axis == CLUTTER_INPUT_AXIS_X)
x = retval[i];
else if (axis == CLUTTER_INPUT_AXIS_Y)
y = retval[i];
break;
default:
_clutter_input_device_translate_axis (device, i,
device_x11->axis_data[i],
&retval[i]);
break;
}
}
if (event_x)
*event_x = x;
if (event_y)
*event_y = y;
return retval;
}
/*
* translate_state:
* @state: the keyboard state of the core device
* @device_state: the button state of the device
*
* Trivially translates the state and the device state into a
* single bitmask.
*/
static guint
translate_state (guint state,
guint device_state)
{
return device_state | (state & 0xff);
}
#endif /* HAVE_XINPUT */
gboolean
_clutter_input_device_x11_translate_xi_event (ClutterInputDeviceX11 *device_x11,
ClutterStageX11 *stage_x11,
XEvent *xevent,
ClutterEvent *event)
{
#ifdef HAVE_XINPUT
ClutterInputDevice *device = CLUTTER_INPUT_DEVICE (device_x11);
if ((xevent->type == device_x11->button_press_type) ||
(xevent->type == device_x11->button_release_type))
{
XDeviceButtonEvent *xdbe = (XDeviceButtonEvent *) xevent;
event->button.type = event->type =
(xdbe->type == device_x11->button_press_type) ? CLUTTER_BUTTON_PRESS
: CLUTTER_BUTTON_RELEASE;
event->button.device = device;
event->button.time = xdbe->time;
event->button.button = xdbe->button;
event->button.modifier_state =
translate_state (xdbe->state, xdbe->device_state);
update_axes (device_x11,
xdbe->axes_count,
xdbe->first_axis,
xdbe->axis_data);
event->button.axes = translate_axes (device_x11, stage_x11,
&event->button.x,
&event->button.y);
_clutter_stage_x11_set_user_time (stage_x11, event->button.time);
return TRUE;
}
if ((xevent->type == device_x11->key_press_type) ||
(xevent->type == device_x11->key_release_type))
{
XDeviceKeyEvent *xdke = (XDeviceKeyEvent *) xevent;
if (xdke->keycode < device->min_keycode ||
xdke->keycode >= device->max_keycode)
{
g_warning ("Invalid device key code received: %d", xdke->keycode);
return FALSE;
}
clutter_input_device_get_key (device,
xdke->keycode - device->min_keycode,
&event->key.keyval,
&event->key.modifier_state);
if (event->key.keyval == 0)
return FALSE;
event->key.type = event->type =
(xdke->type == device_x11->key_press_type) ? CLUTTER_KEY_PRESS
: CLUTTER_KEY_RELEASE;
event->key.time = xdke->time;
event->key.modifier_state |=
translate_state (xdke->state, xdke->device_state);
event->key.device = device;
#if 0
if ((event->key.keyval >= 0x20) && (event->key.keyval <= 0xff))
{
event->key.unicode = (gunichar) event->key.keyval;
}
#endif
_clutter_stage_x11_set_user_time (stage_x11, event->key.time);
return TRUE;
}
if (xevent->type == device_x11->motion_notify_type)
{
XDeviceMotionEvent *xdme = (XDeviceMotionEvent *) xevent;
event->motion.type = event->type = CLUTTER_MOTION;
event->motion.time = xdme->time;
event->motion.modifier_state =
translate_state (xdme->state, xdme->device_state);
event->motion.device = device;
event->motion.axes =
g_new0 (gdouble, clutter_input_device_get_n_axes (device));
update_axes (device_x11,
xdme->axes_count,
xdme->first_axis,
xdme->axis_data);
event->motion.axes = translate_axes (device_x11, stage_x11,
&event->motion.x,
&event->motion.y);
return TRUE;
}
if (xevent->type == device_x11->state_notify_type)
{
XDeviceStateNotifyEvent *xdse = (XDeviceStateNotifyEvent *) xevent;
XInputClass *input_class = (XInputClass *) xdse->data;
gint n_axes = clutter_input_device_get_n_axes (device);
int i;
for (i = 0; i < xdse->num_classes; i++)
{
if (input_class->class == ValuatorClass)
{
int *axis_data = ((XValuatorState *) input_class)->valuators;
update_axes (device_x11, n_axes, 0, axis_data);
}
input_class =
(XInputClass *)(((char *) input_class) + input_class->length);
}
}
#endif /* HAVE_XINPUT */
return FALSE;
}