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evdev: add master / slave device handling

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All evdev devices are slave devices, which means that xkb state
and pointer position must be shared by emulating a core keyboard
and a core pointer. Also, we must make sure to add all modifier
state (keyboard and button) to our events.

https://bugzilla.gnome.org/show_bug.cgi?id=705710
This commit is contained in:
Giovanni Campagna 2013-08-09 11:53:46 +02:00
parent f749858df3
commit 786532213b
4 changed files with 139 additions and 105 deletions
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196
clutter/evdev/clutter-device-manager-evdev.c
View File

@ -51,6 +51,13 @@
#include "clutter-device-manager-evdev.h"
/* These are the same as the XInput2 IDs */
#define CORE_POINTER_ID 2
#define CORE_KEYBOARD_ID 3
#define FIRST_SLAVE_ID 4
#define INVALID_SLAVE_ID 255
struct _ClutterDeviceManagerEvdevPrivate
{
GUdevClient *udev_client;
@ -67,6 +74,9 @@ struct _ClutterDeviceManagerEvdevPrivate
ClutterStageManager *stage_manager;
guint stage_added_handler;
guint stage_removed_handler;
struct xkb_state *xkb; /* XKB state object */
uint32_t button_state;
};
G_DEFINE_TYPE_WITH_PRIVATE (ClutterDeviceManagerEvdev,
@ -105,11 +115,8 @@ struct _ClutterEventSource
{
GSource source;
ClutterInputDeviceEvdev *device; /* back pointer to the evdev device */
ClutterInputDeviceEvdev *device; /* back pointer to the slave evdev device */
GPollFD event_poll_fd; /* file descriptor of the /dev node */
struct xkb_state *xkb; /* XKB state object */
gint x, y; /* last x, y position for pointers */
guint32 modifier_state; /* key modifiers */
};
static gboolean
@ -147,9 +154,6 @@ clutter_event_check (GSource *source)
static void
queue_event (ClutterEvent *event)
{
if (event == NULL)
return;
_clutter_event_push (event, FALSE);
}
@ -160,6 +164,7 @@ notify_key (ClutterEventSource *source,
guint32 state)
{
ClutterInputDevice *input_device = (ClutterInputDevice *) source->device;
ClutterDeviceManagerEvdev *manager_evdev;
ClutterStage *stage;
ClutterEvent *event = NULL;
@ -169,31 +174,37 @@ notify_key (ClutterEventSource *source,
if (!stage)
return;
/* if we have a mapping for that device, use it to generate the event */
if (source->xkb)
manager_evdev = CLUTTER_DEVICE_MANAGER_EVDEV (input_device->device_manager);
/* if we have keyboard state, use it to generate the event */
if (manager_evdev->priv->xkb)
{
event =
_clutter_key_event_new_from_evdev (input_device,
manager_evdev->priv->core_keyboard,
stage,
source->xkb,
manager_evdev->priv->xkb,
manager_evdev->priv->button_state,
time_, key, state);
xkb_state_update_key (source->xkb, event->key.hardware_keycode, state ? XKB_KEY_DOWN : XKB_KEY_UP);
}
xkb_state_update_key (manager_evdev->priv->xkb, event->key.hardware_keycode, state ? XKB_KEY_DOWN : XKB_KEY_UP);
queue_event (event);
}
}
static void
notify_motion (ClutterEventSource *source,
notify_relative_motion (ClutterEventSource *source,
guint32 time_,
gint x,
gint y)
gint dx,
gint dy)
{
ClutterInputDevice *input_device = (ClutterInputDevice *) source->device;
gfloat stage_width, stage_height, new_x, new_y;
ClutterEvent *event;
ClutterDeviceManagerEvdev *manager_evdev;
ClutterStage *stage;
ClutterEvent *event = NULL;
ClutterPoint point;
/* We can drop the event on the floor if no stage has been
* associated with the device yet. */
@ -201,34 +212,27 @@ notify_motion (ClutterEventSource *source,
if (!stage)
return;
manager_evdev = CLUTTER_DEVICE_MANAGER_EVDEV (input_device->device_manager);
stage_width = clutter_actor_get_width (CLUTTER_ACTOR (stage));
stage_height = clutter_actor_get_height (CLUTTER_ACTOR (stage));
event = clutter_event_new (CLUTTER_MOTION);
if (x < 0)
new_x = 0.f;
else if (x >= stage_width)
new_x = stage_width - 1;
else
new_x = x;
if (y < 0)
new_y = 0.f;
else if (y >= stage_height)
new_y = stage_height - 1;
else
new_y = y;
source->x = new_x;
source->y = new_y;
clutter_input_device_get_coords (manager_evdev->priv->core_pointer, NULL, &point);
new_x = point.x + dx;
new_y = point.y + dy;
new_x = CLAMP (new_x, 0.f, stage_width - 1);
new_y = CLAMP (new_y, 0.f, stage_height - 1);
event->motion.time = time_;
event->motion.stage = stage;
event->motion.device = input_device;
event->motion.modifier_state = source->modifier_state;
event->motion.device = manager_evdev->priv->core_pointer;
event->motion.modifier_state = xkb_state_serialize_mods (manager_evdev->priv->xkb, XKB_STATE_EFFECTIVE);
event->motion.modifier_state |= manager_evdev->priv->button_state;
event->motion.x = new_x;
event->motion.y = new_y;
clutter_event_set_source_device (event, input_device);
queue_event (event);
}
@ -240,8 +244,10 @@ notify_button (ClutterEventSource *source,
guint32 state)
{
ClutterInputDevice *input_device = (ClutterInputDevice *) source->device;
ClutterEvent *event;
ClutterDeviceManagerEvdev *manager_evdev;
ClutterStage *stage;
ClutterEvent *event = NULL;
ClutterPoint point;
gint button_nr;
static gint maskmap[8] =
{
@ -255,6 +261,8 @@ notify_button (ClutterEventSource *source,
if (!stage)
return;
manager_evdev = CLUTTER_DEVICE_MANAGER_EVDEV (input_device->device_manager);
/* The evdev button numbers don't map sequentially to clutter button
* numbers (the right and middle mouse buttons are in the opposite
* order) so we'll map them directly with a switch statement */
@ -290,17 +298,20 @@ notify_button (ClutterEventSource *source,
/* Update the modifiers */
if (state)
source->modifier_state |= maskmap[button - BTN_LEFT];
manager_evdev->priv->button_state |= maskmap[button - BTN_LEFT];
else
source->modifier_state &= ~maskmap[button - BTN_LEFT];
manager_evdev->priv->button_state &= ~maskmap[button - BTN_LEFT];
event->button.time = time_;
event->button.stage = CLUTTER_STAGE (stage);
event->button.device = (ClutterInputDevice *) source->device;
event->button.modifier_state = source->modifier_state;
event->button.device = manager_evdev->priv->core_pointer;
event->motion.modifier_state = xkb_state_serialize_mods (manager_evdev->priv->xkb, XKB_STATE_EFFECTIVE);
event->button.modifier_state |= manager_evdev->priv->button_state;
event->button.button = button_nr;
event->button.x = source->x;
event->button.y = source->y;
clutter_input_device_get_coords (manager_evdev->priv->core_pointer, NULL, &point);
event->button.x = point.x;
event->button.y = point.y;
clutter_event_set_source_device (event, (ClutterInputDevice*) source->device);
queue_event (event);
}
@ -363,7 +374,6 @@ clutter_event_dispatch (GSource *g_source,
struct input_event *e = &ev[i];
_time = e->time.tv_sec * 1000 + e->time.tv_usec / 1000;
event = NULL;
switch (e->type)
{
@ -430,12 +440,10 @@ clutter_event_dispatch (GSource *g_source,
g_warning ("Unhandled event of type %d", e->type);
break;
}
queue_event (event);
}
if (dx != 0 || dy != 0)
notify_motion (source, _time, source->x + dx, source->y + dy);
notify_relative_motion (source, _time, dx, dy);
}
/* Pop an event off the queue if any */
@ -465,7 +473,6 @@ clutter_event_source_new (ClutterInputDeviceEvdev *input_device)
{
GSource *source = g_source_new (&event_funcs, sizeof (ClutterEventSource));
ClutterEventSource *event_source = (ClutterEventSource *) source;
ClutterInputDeviceType type;
const gchar *node_path;
gint fd;
GError *error;
@ -502,31 +509,6 @@ clutter_event_source_new (ClutterInputDeviceEvdev *input_device)
event_source->event_poll_fd.fd = fd;
event_source->event_poll_fd.events = G_IO_IN;
type =
clutter_input_device_get_device_type (CLUTTER_INPUT_DEVICE (input_device));
if (type == CLUTTER_KEYBOARD_DEVICE)
{
/* create the xkb description */
event_source->xkb = _clutter_xkb_state_new (NULL,
option_xkb_layout,
option_xkb_variant,
option_xkb_options);
if (G_UNLIKELY (event_source->xkb == NULL))
{
g_warning ("Could not compile keymap %s:%s:%s", option_xkb_layout,
option_xkb_variant, option_xkb_options);
close (fd);
g_source_unref (source);
return NULL;
}
}
else if (type == CLUTTER_POINTER_DEVICE)
{
event_source->x = 0;
event_source->y = 0;
}
/* and finally configure and attach the GSource */
g_source_set_priority (source, CLUTTER_PRIORITY_EVENTS);
g_source_add_poll (source, &event_source->event_poll_fd);
@ -593,6 +575,7 @@ evdev_add_device (ClutterDeviceManagerEvdev *manager_evdev,
ClutterInputDeviceType type = CLUTTER_EXTENSION_DEVICE;
ClutterInputDevice *device;
const gchar *device_file, *sysfs_path, *device_name;
int id, ok;
device_file = g_udev_device_get_device_file (udev_device);
sysfs_path = g_udev_device_get_sysfs_path (udev_device);
@ -625,10 +608,18 @@ evdev_add_device (ClutterDeviceManagerEvdev *manager_evdev,
else if (g_udev_device_has_property (udev_device, "ID_INPUT_TOUCHSCREEN"))
type = CLUTTER_TOUCHSCREEN_DEVICE;
ok = sscanf (device_file, "/dev/input/event%d", &id);
if (ok == 1)
id += FIRST_SLAVE_ID;
else
id = INVALID_SLAVE_ID;
device = g_object_new (CLUTTER_TYPE_INPUT_DEVICE_EVDEV,
"id", 0,
"id", id,
"name", device_name,
"device-manager", manager,
"device-type", type,
"device-mode", CLUTTER_INPUT_MODE_SLAVE,
"sysfs-path", sysfs_path,
"device-path", device_file,
"enabled", TRUE,
@ -637,6 +628,16 @@ evdev_add_device (ClutterDeviceManagerEvdev *manager_evdev,
_clutter_input_device_set_stage (device, manager_evdev->priv->stage);
_clutter_device_manager_add_device (manager, device);
if (type == CLUTTER_KEYBOARD_DEVICE)
{
_clutter_input_device_set_associated_device (device, manager_evdev->priv->core_keyboard);
_clutter_input_device_add_slave (manager_evdev->priv->core_keyboard, device);
}
else
{
_clutter_input_device_set_associated_device (device, manager_evdev->priv->core_pointer);
_clutter_input_device_add_slave (manager_evdev->priv->core_pointer, device);
}
CLUTTER_NOTE (EVENT, "Added device %s, type %d, sysfs %s",
device_file, type, sysfs_path);
@ -715,9 +716,7 @@ clutter_device_manager_evdev_add_device (ClutterDeviceManager *manager,
{
ClutterDeviceManagerEvdev *manager_evdev;
ClutterDeviceManagerEvdevPrivate *priv;
ClutterInputDeviceType device_type;
ClutterInputDeviceEvdev *device_evdev;
gboolean is_pointer, is_keyboard;
GSource *source;
manager_evdev = CLUTTER_DEVICE_MANAGER_EVDEV (manager);
@ -725,23 +724,17 @@ clutter_device_manager_evdev_add_device (ClutterDeviceManager *manager,
device_evdev = CLUTTER_INPUT_DEVICE_EVDEV (device);
device_type = clutter_input_device_get_device_type (device);
is_pointer = device_type == CLUTTER_POINTER_DEVICE;
is_keyboard = device_type == CLUTTER_KEYBOARD_DEVICE;
priv->devices = g_slist_prepend (priv->devices, device);
if (is_pointer && priv->core_pointer == NULL)
priv->core_pointer = device;
if (is_keyboard && priv->core_keyboard == NULL)
priv->core_keyboard = device;
if (clutter_input_device_get_device_mode (device) == CLUTTER_INPUT_MODE_SLAVE)
{
/* Install the GSource for this device */
source = clutter_event_source_new (device_evdev);
if (G_LIKELY (source))
g_assert (source != NULL);
priv->event_sources = g_slist_prepend (priv->event_sources, source);
}
}
static void
clutter_device_manager_evdev_remove_device (ClutterDeviceManager *manager,
@ -757,6 +750,8 @@ clutter_device_manager_evdev_remove_device (ClutterDeviceManager *manager,
/* Remove the device */
priv->devices = g_slist_remove (priv->devices, device);
if (clutter_input_device_get_device_mode (device) == CLUTTER_INPUT_MODE_SLAVE)
{
/* Remove the source */
source = find_source_by_device (manager_evdev, device);
if (G_UNLIKELY (source == NULL))
@ -768,6 +763,7 @@ clutter_device_manager_evdev_remove_device (ClutterDeviceManager *manager,
clutter_event_source_free (source);
priv->event_sources = g_slist_remove (priv->event_sources, source);
}
}
static const GSList *
clutter_device_manager_evdev_get_devices (ClutterDeviceManager *manager)
@ -849,10 +845,40 @@ clutter_device_manager_evdev_constructed (GObject *gobject)
{
ClutterDeviceManagerEvdev *manager_evdev;
ClutterDeviceManagerEvdevPrivate *priv;
ClutterInputDevice *device;
manager_evdev = CLUTTER_DEVICE_MANAGER_EVDEV (gobject);
priv = manager_evdev->priv;
device = g_object_new (CLUTTER_TYPE_INPUT_DEVICE_EVDEV,
"id", CORE_POINTER_ID,
"name", "input/core_pointer",
"device-manager", manager_evdev,
"device-type", CLUTTER_POINTER_DEVICE,
"device-mode", CLUTTER_INPUT_MODE_MASTER,
"enabled", TRUE,
NULL);
_clutter_input_device_set_stage (device, priv->stage);
_clutter_device_manager_add_device (CLUTTER_DEVICE_MANAGER (manager_evdev), device);
priv->core_pointer = device;
device = g_object_new (CLUTTER_TYPE_INPUT_DEVICE_EVDEV,
"id", CORE_KEYBOARD_ID,
"name", "input/core_keyboard",
"device-manager", manager_evdev,
"device-type", CLUTTER_KEYBOARD_DEVICE,
"device-mode", CLUTTER_INPUT_MODE_MASTER,
"enabled", TRUE,
NULL);
_clutter_input_device_set_stage (device, priv->stage);
_clutter_device_manager_add_device (CLUTTER_DEVICE_MANAGER (manager_evdev), device);
priv->core_keyboard = device;
priv->xkb = _clutter_xkb_state_new (NULL,
option_xkb_layout,
option_xkb_variant,
option_xkb_options);
priv->udev_client = g_udev_client_new (subsystems);
clutter_device_manager_evdev_probe_devices (manager_evdev);

6
clutter/evdev/clutter-xkb-utils.c
View File

@ -42,8 +42,10 @@
*/
ClutterEvent *
_clutter_key_event_new_from_evdev (ClutterInputDevice *device,
ClutterInputDevice *core_device,
ClutterStage *stage,
struct xkb_state *xkb_state,
uint32_t button_state,
uint32_t _time,
xkb_keycode_t key,
uint32_t state)
@ -71,13 +73,15 @@ _clutter_key_event_new_from_evdev (ClutterInputDevice *device,
else
sym = XKB_KEY_NoSymbol;
event->key.device = device;
event->key.device = core_device;
event->key.stage = stage;
event->key.time = _time;
event->key.modifier_state =
xkb_state_serialize_mods (xkb_state, XKB_STATE_EFFECTIVE);
event->key.modifier_state |= button_state;
event->key.hardware_keycode = key;
event->key.keyval = sym;
clutter_event_set_source_device (event, device);
n = xkb_keysym_to_utf8 (sym, buffer, sizeof (buffer));

2
clutter/evdev/clutter-xkb-utils.h
View File

@ -32,8 +32,10 @@
#include "clutter-input-device.h"
ClutterEvent * _clutter_key_event_new_from_evdev (ClutterInputDevice *device,
ClutterInputDevice *core_keyboard,
ClutterStage *stage,
struct xkb_state *xkb_state,
uint32_t button_state,
uint32_t _time,
uint32_t key,
uint32_t state);

6
clutter/wayland/clutter-input-device-wayland.c
View File

@ -256,8 +256,9 @@ clutter_wayland_repeat_key (void *data)
ClutterEvent *event;
event = _clutter_key_event_new_from_evdev ((ClutterInputDevice *) device,
(ClutterInputDevice*) device,
stage_cogl->wrapper,
device->xkb,
device->xkb, 0,
device->repeat_time,
device->repeat_key,
1);
@ -292,8 +293,9 @@ clutter_wayland_handle_key (void *data,
return;
event = _clutter_key_event_new_from_evdev ((ClutterInputDevice *) device,
(ClutterInputDevice *) device,
stage_cogl->wrapper,
device->xkb,
device->xkb, 0,
_clutter_wayland_get_time(),
key, state);