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mutter/clutter/x11/clutter-device-manager-core-x11.c
Emmanuele Bassi 82d1e5a6ee Clean up crossing event synthesis code 
Clutter should just require that the windowing system used by a backend
adds a device to the stage when the device enters, and removes it from
the stage when the device leaves; with this information, we can
synthesize every crossing event and update the device state without
other intervention from the backend-specific code.

The generation of additional crossing events for actors that are
covering the stage at the coordinates of the crossing event should be
delegated to the event processing code.

The x11 and win32 backends need to be modified to relay the enter and
leave events from the windowing system.
2011-01-28 18:19:49 +00:00

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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright © 2009, 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-device-manager-core-x11.h"
#include "clutter-backend-x11.h"
#include "clutter-input-device-core-x11.h"
#include "clutter-stage-x11.h"
#include "clutter-backend.h"
#include "clutter-debug.h"
#include "clutter-device-manager-private.h"
#include "clutter-event-translator.h"
#include "clutter-stage-private.h"
#include "clutter-private.h"
#ifdef HAVE_XINPUT
#include <X11/extensions/XInput.h>
/* old versions of XI.h don't define these */
#ifndef IsXExtensionKeyboard
#define IsXExtensionKeyboard 3
#define IsXExtensionPointer 4
#endif
#endif /* HAVE_XINPUT */
enum
{
PROP_0,
PROP_EVENT_BASE,
PROP_LAST
};
static GParamSpec *obj_props[PROP_LAST] = { NULL, };
static void clutter_event_translator_iface_init (ClutterEventTranslatorIface *iface);
#define clutter_device_manager_x11_get_type _clutter_device_manager_x11_get_type
G_DEFINE_TYPE_WITH_CODE (ClutterDeviceManagerX11,
clutter_device_manager_x11,
CLUTTER_TYPE_DEVICE_MANAGER,
G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_EVENT_TRANSLATOR,
clutter_event_translator_iface_init));
#ifdef HAVE_XINPUT
static void
translate_class_info (ClutterInputDevice *device,
XDeviceInfo *info)
{
XAnyClassPtr any_class;
gint i;
any_class = info->inputclassinfo;
for (i = 0; i < info->num_classes; i++)
{
switch (any_class->class)
{
case ButtonClass:
break;
case KeyClass:
{
XKeyInfo *xk_info = (XKeyInfo *) any_class;
ClutterInputDeviceX11 *device_x11;
guint n_keys;
device_x11 = CLUTTER_INPUT_DEVICE_X11 (device);
n_keys = xk_info->max_keycode - xk_info->min_keycode + 1;
_clutter_input_device_set_n_keys (device, n_keys);
device_x11->min_keycode = xk_info->min_keycode;
device_x11->max_keycode = xk_info->max_keycode;
}
break;
case ValuatorClass:
{
XValuatorInfo *xv_info = (XValuatorInfo *) any_class;
gint j;
for (j = 0; j < xv_info->num_axes; j++)
{
ClutterInputAxis axis;
switch (j)
{
case 0:
axis = CLUTTER_INPUT_AXIS_X;
break;
case 1:
axis = CLUTTER_INPUT_AXIS_Y;
break;
case 2:
axis = CLUTTER_INPUT_AXIS_PRESSURE;
break;
case 3:
axis = CLUTTER_INPUT_AXIS_XTILT;
break;
case 4:
axis = CLUTTER_INPUT_AXIS_YTILT;
break;
case 5:
axis = CLUTTER_INPUT_AXIS_WHEEL;
break;
default:
axis = CLUTTER_INPUT_AXIS_IGNORE;
break;
}
_clutter_input_device_add_axis (device, axis,
xv_info->axes[j].min_value,
xv_info->axes[j].max_value,
xv_info->axes[j].resolution);
}
}
break;
}
any_class = (XAnyClassPtr) (((char *) any_class) + any_class->length);
}
}
static ClutterInputDevice *
create_device (ClutterDeviceManagerX11 *manager_x11,
ClutterBackendX11 *backend_x11,
XDeviceInfo *info)
{
ClutterInputDeviceType source;
ClutterInputDevice *retval;
if (info->use != IsXExtensionPointer &&
info->use != IsXExtensionKeyboard)
return NULL;
if (info->use == IsXExtensionKeyboard)
source = CLUTTER_KEYBOARD_DEVICE;
else
{
gchar *name;
name = g_ascii_strdown (info->name, -1);
if (strstr (name, "eraser") != NULL)
source = CLUTTER_ERASER_DEVICE;
else if (strstr (name, "cursor") != NULL)
source = CLUTTER_CURSOR_DEVICE;
else if (strstr (name, "wacom") != NULL || strstr (name, "pen") != NULL)
source = CLUTTER_PEN_DEVICE;
else
source = CLUTTER_POINTER_DEVICE;
g_free (name);
}
retval = g_object_new (CLUTTER_TYPE_INPUT_DEVICE_X11,
"name", info->name,
"id", info->id,
"has-cursor", FALSE,
"device-manager", manager_x11,
"device-type", source,
"device-mode", CLUTTER_INPUT_MODE_FLOATING,
"backend", backend_x11,
"enabled", FALSE,
NULL);
translate_class_info (retval, info);
CLUTTER_NOTE (BACKEND,
"XI Device '%s' (id: %d) created",
info->name,
(int) info->id);
return retval;
}
#endif /* HAVE_XINPUT */
static inline void
translate_key_event (ClutterBackendX11 *backend_x11,
ClutterDeviceManagerX11 *manager_x11,
ClutterEvent *event,
XEvent *xevent)
{
ClutterEventX11 *event_x11;
char buffer[256 + 1];
int n;
event->key.type = xevent->xany.type == KeyPress ? CLUTTER_KEY_PRESS
: CLUTTER_KEY_RELEASE;
event->key.time = xevent->xkey.time;
clutter_event_set_device (event, manager_x11->core_keyboard);
/* KeyEvents have platform specific data associated to them */
event_x11 = _clutter_event_x11_new ();
_clutter_event_set_platform_data (event, event_x11);
event->key.modifier_state = (ClutterModifierType) xevent->xkey.state;
event->key.hardware_keycode = xevent->xkey.keycode;
/* keyval is the key ignoring all modifiers ('1' vs. '!') */
event->key.keyval =
_clutter_keymap_x11_translate_key_state (backend_x11->keymap,
event->key.hardware_keycode,
event->key.modifier_state,
NULL);
event_x11->key_group =
_clutter_keymap_x11_get_key_group (backend_x11->keymap,
event->key.modifier_state);
event_x11->key_is_modifier =
_clutter_keymap_x11_get_is_modifier (backend_x11->keymap,
event->key.hardware_keycode);
event_x11->num_lock_set =
_clutter_keymap_x11_get_num_lock_state (backend_x11->keymap);
event_x11->caps_lock_set =
_clutter_keymap_x11_get_caps_lock_state (backend_x11->keymap);
/* unicode_value is the printable representation */
n = XLookupString (&xevent->xkey, buffer, sizeof (buffer) - 1, NULL, NULL);
if (n != NoSymbol)
{
event->key.unicode_value = g_utf8_get_char_validated (buffer, n);
if ((event->key.unicode_value != -1) &&
(event->key.unicode_value != -2))
goto out;
}
else
event->key.unicode_value = (gunichar)'\0';
out:
CLUTTER_NOTE (EVENT,
"%s: win:0x%x, key: %12s (%d)",
event->any.type == CLUTTER_KEY_PRESS
? "key press "
: "key release",
(unsigned int) xevent->xkey.window,
event->key.keyval ? buffer : "(none)",
event->key.keyval);
return;
}
#ifdef HAVE_XINPUT
static ClutterInputDevice *
get_device_from_event (ClutterDeviceManagerX11 *manager_x11,
XEvent *xevent)
{
guint32 device_id;
device_id = ((XDeviceButtonEvent *) xevent)->deviceid;
return g_hash_table_lookup (manager_x11->devices_by_id,
GINT_TO_POINTER (device_id));
}
#endif /* HAVE_XINPUT */
static ClutterTranslateReturn
clutter_device_manager_x11_translate_event (ClutterEventTranslator *translator,
gpointer native,
ClutterEvent *event)
{
ClutterDeviceManagerX11 *manager_x11;
ClutterBackendX11 *backend_x11;
ClutterInputDevice *device;
ClutterStageX11 *stage_x11;
ClutterTranslateReturn res;
ClutterStage *stage;
XEvent *xevent;
manager_x11 = CLUTTER_DEVICE_MANAGER_X11 (translator);
backend_x11 = CLUTTER_BACKEND_X11 (clutter_get_default_backend ());
device = NULL;
xevent = native;
stage = clutter_x11_get_stage_from_window (xevent->xany.window);
if (stage == NULL)
return CLUTTER_TRANSLATE_CONTINUE;
if (CLUTTER_ACTOR_IN_DESTRUCTION (stage))
return CLUTTER_TRANSLATE_CONTINUE;
stage_x11 = CLUTTER_STAGE_X11 (_clutter_stage_get_window (stage));
event->any.stage = stage;
res = CLUTTER_TRANSLATE_CONTINUE;
#ifdef HAVE_XINPUT
device = get_device_from_event (manager_x11, xevent);
if (device != NULL)
{
ClutterInputDeviceX11 *device_x11;
gboolean retval;
device_x11 = CLUTTER_INPUT_DEVICE_X11 (device);
retval = _clutter_input_device_x11_translate_xi_event (device_x11,
stage_x11,
xevent,
event);
if (retval)
return CLUTTER_TRANSLATE_QUEUE;
}
#endif /* HAVE_XINPUT */
switch (xevent->type)
{
case KeyPress:
translate_key_event (backend_x11, manager_x11, event, xevent);
_clutter_stage_x11_set_user_time (stage_x11, xevent->xkey.time);
res = CLUTTER_TRANSLATE_QUEUE;
break;
case KeyRelease:
/* old-style X11 terminals require that even modern X11 send
* KeyPress/KeyRelease pairs when auto-repeating. for this
* reason modern(-ish) API like XKB has a way to detect
* auto-repeat and do a single KeyRelease at the end of a
* KeyPress sequence.
*
* this check emulates XKB's detectable auto-repeat; we peek
* the next event and check if it's a KeyPress for the same key
* and timestamp - and then ignore it if it matches the
* KeyRelease
*
* if we have XKB, and autorepeat is enabled, then this becomes
* a no-op
*/
if (!backend_x11->have_xkb_autorepeat && XPending (xevent->xkey.display))
{
XEvent next_event;
XPeekEvent (xevent->xkey.display, &next_event);
if (next_event.type == KeyPress &&
next_event.xkey.keycode == xevent->xkey.keycode &&
next_event.xkey.time == xevent->xkey.time)
{
res = CLUTTER_TRANSLATE_REMOVE;
break;
}
}
translate_key_event (backend_x11, manager_x11, event, xevent);
res = CLUTTER_TRANSLATE_QUEUE;
break;
case ButtonPress:
CLUTTER_NOTE (EVENT,
"button press: win: 0x%x, coords: %d, %d, button: %d",
(unsigned int) stage_x11->xwin,
xevent->xbutton.x,
xevent->xbutton.y,
xevent->xbutton.button);
switch (xevent->xbutton.button)
{
case 4: /* up */
case 5: /* down */
case 6: /* left */
case 7: /* right */
event->scroll.type = CLUTTER_SCROLL;
if (xevent->xbutton.button == 4)
event->scroll.direction = CLUTTER_SCROLL_UP;
else if (xevent->xbutton.button == 5)
event->scroll.direction = CLUTTER_SCROLL_DOWN;
else if (xevent->xbutton.button == 6)
event->scroll.direction = CLUTTER_SCROLL_LEFT;
else
event->scroll.direction = CLUTTER_SCROLL_RIGHT;
event->scroll.time = xevent->xbutton.time;
event->scroll.x = xevent->xbutton.x;
event->scroll.y = xevent->xbutton.y;
event->scroll.modifier_state = xevent->xbutton.state;
event->scroll.axes = NULL;
break;
default:
event->button.type = event->type = CLUTTER_BUTTON_PRESS;
event->button.time = xevent->xbutton.time;
event->button.x = xevent->xbutton.x;
event->button.y = xevent->xbutton.y;
event->button.modifier_state = xevent->xbutton.state;
event->button.button = xevent->xbutton.button;
event->button.axes = NULL;
break;
}
clutter_event_set_device (event, manager_x11->core_pointer);
_clutter_stage_x11_set_user_time (stage_x11, xevent->xbutton.time);
res = CLUTTER_TRANSLATE_QUEUE;
break;
case ButtonRelease:
CLUTTER_NOTE (EVENT,
"button press: win: 0x%x, coords: %d, %d, button: %d",
(unsigned int) stage_x11->xwin,
xevent->xbutton.x,
xevent->xbutton.y,
xevent->xbutton.button);
/* scroll events don't have a corresponding release */
if (xevent->xbutton.button == 4 ||
xevent->xbutton.button == 5 ||
xevent->xbutton.button == 6 ||
xevent->xbutton.button == 7)
{
res = CLUTTER_TRANSLATE_REMOVE;
break;
}
event->button.type = event->type = CLUTTER_BUTTON_RELEASE;
event->button.time = xevent->xbutton.time;
event->button.x = xevent->xbutton.x;
event->button.y = xevent->xbutton.y;
event->button.modifier_state = xevent->xbutton.state;
event->button.button = xevent->xbutton.button;
event->button.axes = NULL;
clutter_event_set_device (event, manager_x11->core_pointer);
res = CLUTTER_TRANSLATE_QUEUE;
break;
case MotionNotify:
CLUTTER_NOTE (EVENT,
"motion: win: 0x%x, coords: %d, %d",
(unsigned int) stage_x11->xwin,
xevent->xmotion.x,
xevent->xmotion.y);
event->motion.type = event->type = CLUTTER_MOTION;
event->motion.time = xevent->xmotion.time;
event->motion.x = xevent->xmotion.x;
event->motion.y = xevent->xmotion.y;
event->motion.modifier_state = xevent->xmotion.state;
event->motion.axes = NULL;
clutter_event_set_device (event, manager_x11->core_pointer);
res = CLUTTER_TRANSLATE_QUEUE;
break;
case EnterNotify:
CLUTTER_NOTE (EVENT, "Entering the stage (time:%u)",
(unsigned int) xevent->xcrossing.time);
event->crossing.type = CLUTTER_ENTER;
event->crossing.time = xevent->xcrossing.time;
event->crossing.x = xevent->xcrossing.x;
event->crossing.y = xevent->xcrossing.y;
event->crossing.source = CLUTTER_ACTOR (stage);
event->crossing.related = NULL;
clutter_event_set_device (event, manager_x11->core_pointer);
_clutter_stage_add_device (stage, manager_x11->core_pointer);
res = CLUTTER_TRANSLATE_QUEUE;
break;
case LeaveNotify:
if (manager_x11->core_pointer->stage == NULL)
{
CLUTTER_NOTE (EVENT, "Discarding LeaveNotify for "
"ButtonRelease event off-stage");
res = CLUTTER_TRANSLATE_REMOVE;
break;
}
/* we know that we are leaving the stage here */
CLUTTER_NOTE (EVENT, "Leaving the stage (time:%u)",
(unsigned int) xevent->xcrossing.time);
event->crossing.type = CLUTTER_LEAVE;
event->crossing.time = xevent->xcrossing.time;
event->crossing.x = xevent->xcrossing.x;
event->crossing.y = xevent->xcrossing.y;
event->crossing.source = CLUTTER_ACTOR (stage);
event->crossing.related = NULL;
clutter_event_set_device (event, manager_x11->core_pointer);
_clutter_stage_remove_device (stage, manager_x11->core_pointer);
res = CLUTTER_TRANSLATE_QUEUE;
break;
default:
break;
}
return res;
}
static void
clutter_event_translator_iface_init (ClutterEventTranslatorIface *iface)
{
iface->translate_event = clutter_device_manager_x11_translate_event;
}
static void
clutter_device_manager_x11_constructed (GObject *gobject)
{
ClutterDeviceManagerX11 *manager_x11;
ClutterBackendX11 *backend_x11;
ClutterDeviceManager *manager;
#ifdef HAVE_XINPUT
XDeviceInfo *x_devices = NULL;
int i, n_devices;
#endif /* HAVE_XINPUT */
manager = CLUTTER_DEVICE_MANAGER (gobject);
manager_x11 = CLUTTER_DEVICE_MANAGER_X11 (gobject);
g_object_get (gobject, "backend", &backend_x11, NULL);
g_assert (backend_x11 != NULL);
#ifdef HAVE_XINPUT
x_devices = XListInputDevices (backend_x11->xdpy, &n_devices);
if (n_devices == 0)
{
CLUTTER_NOTE (BACKEND, "No XInput devices found");
goto default_device;
}
for (i = 0; i < n_devices; i++)
{
XDeviceInfo *info = x_devices + i;
ClutterInputDevice *device;
CLUTTER_NOTE (BACKEND,
"Considering device %li with type %d, %d of %d",
info->id,
info->use,
i, n_devices);
device = create_device (manager_x11, backend_x11, info);
if (device != NULL)
_clutter_device_manager_add_device (manager, device);
}
XFreeDeviceList (x_devices);
default_device:
#endif /* HAVE_XINPUT */
/* fallback code in case:
*
* - we do not have XInput support compiled in
* - we do not have the XInput extension
*
* we register two default devices, one for the pointer
* and one for the keyboard. this block must also be
* executed for the XInput support because XI does not
* cover core devices
*/
manager_x11->core_pointer =
g_object_new (CLUTTER_TYPE_INPUT_DEVICE,
"name", "Core Pointer",
"has-cursor", TRUE,
"device-type", CLUTTER_POINTER_DEVICE,
"device-manager", manager_x11,
"device-mode", CLUTTER_INPUT_MODE_MASTER,
"backend", backend_x11,
"enabled", TRUE,
NULL);
CLUTTER_NOTE (BACKEND, "Added core pointer device");
manager_x11->core_keyboard =
g_object_new (CLUTTER_TYPE_INPUT_DEVICE,
"name", "Core Keyboard",
"has-cursor", FALSE,
"device-type", CLUTTER_KEYBOARD_DEVICE,
"device-manager", manager_x11,
"device-mode", CLUTTER_INPUT_MODE_MASTER,
"backend", backend_x11,
"enabled", TRUE,
NULL);
CLUTTER_NOTE (BACKEND, "Added core keyboard device");
/* associate core devices */
_clutter_input_device_set_associated_device (manager_x11->core_pointer,
manager_x11->core_keyboard);
_clutter_input_device_set_associated_device (manager_x11->core_keyboard,
manager_x11->core_pointer);
if (G_OBJECT_CLASS (clutter_device_manager_x11_parent_class)->constructed)
G_OBJECT_CLASS (clutter_device_manager_x11_parent_class)->constructed (gobject);
}
static void
clutter_device_manager_x11_add_device (ClutterDeviceManager *manager,
ClutterInputDevice *device)
{
ClutterDeviceManagerX11 *manager_x11 = CLUTTER_DEVICE_MANAGER_X11 (manager);
manager_x11->devices = g_slist_prepend (manager_x11->devices, device);
g_hash_table_replace (manager_x11->devices_by_id,
GINT_TO_POINTER (device->id),
device);
/* blow the cache */
g_slist_free (manager_x11->all_devices);
manager_x11->all_devices = NULL;
}
static void
clutter_device_manager_x11_remove_device (ClutterDeviceManager *manager,
ClutterInputDevice *device)
{
ClutterDeviceManagerX11 *manager_x11 = CLUTTER_DEVICE_MANAGER_X11 (manager);
g_hash_table_remove (manager_x11->devices_by_id,
GINT_TO_POINTER (device->id));
manager_x11->devices = g_slist_remove (manager_x11->devices, device);
/* blow the cache */
g_slist_free (manager_x11->all_devices);
manager_x11->all_devices = NULL;
}
static const GSList *
clutter_device_manager_x11_get_devices (ClutterDeviceManager *manager)
{
ClutterDeviceManagerX11 *manager_x11 = CLUTTER_DEVICE_MANAGER_X11 (manager);
/* cache the devices list so that we can keep the core pointer
* and keyboard outside of the ManagerX11:devices list
*/
if (manager_x11->all_devices == NULL)
{
GSList *all_devices = manager_x11->devices;
all_devices = g_slist_prepend (all_devices, manager_x11->core_keyboard);
all_devices = g_slist_prepend (all_devices, manager_x11->core_pointer);
manager_x11->all_devices = all_devices;
}
return CLUTTER_DEVICE_MANAGER_X11 (manager)->all_devices;
}
static ClutterInputDevice *
clutter_device_manager_x11_get_core_device (ClutterDeviceManager *manager,
ClutterInputDeviceType type)
{
ClutterDeviceManagerX11 *manager_x11;
manager_x11 = CLUTTER_DEVICE_MANAGER_X11 (manager);
switch (type)
{
case CLUTTER_POINTER_DEVICE:
return manager_x11->core_pointer;
case CLUTTER_KEYBOARD_DEVICE:
return manager_x11->core_keyboard;
default:
return NULL;
}
return NULL;
}
static ClutterInputDevice *
clutter_device_manager_x11_get_device (ClutterDeviceManager *manager,
gint id)
{
ClutterDeviceManagerX11 *manager_x11 = CLUTTER_DEVICE_MANAGER_X11 (manager);
return g_hash_table_lookup (manager_x11->devices_by_id,
GINT_TO_POINTER (id));
}
static void
clutter_device_manager_x11_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterDeviceManagerX11 *manager_x11 = CLUTTER_DEVICE_MANAGER_X11 (gobject);
switch (prop_id)
{
case PROP_EVENT_BASE:
manager_x11->xi_event_base = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_device_manager_x11_class_init (ClutterDeviceManagerX11Class *klass)
{
ClutterDeviceManagerClass *manager_class;
GObjectClass *gobject_class;
obj_props[PROP_EVENT_BASE] =
g_param_spec_int ("event-base",
"Event Base",
"The first XI event",
-1, G_MAXINT,
-1,
CLUTTER_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY);
gobject_class = G_OBJECT_CLASS (klass);
gobject_class->constructed = clutter_device_manager_x11_constructed;
gobject_class->set_property = clutter_device_manager_x11_set_property;
g_object_class_install_properties (gobject_class, PROP_LAST, obj_props);
manager_class = CLUTTER_DEVICE_MANAGER_CLASS (klass);
manager_class->add_device = clutter_device_manager_x11_add_device;
manager_class->remove_device = clutter_device_manager_x11_remove_device;
manager_class->get_devices = clutter_device_manager_x11_get_devices;
manager_class->get_core_device = clutter_device_manager_x11_get_core_device;
manager_class->get_device = clutter_device_manager_x11_get_device;
}
static void
clutter_device_manager_x11_init (ClutterDeviceManagerX11 *self)
{
self->devices_by_id = g_hash_table_new (NULL, NULL);
}
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