libmks/lib/mks-touchable.c

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/*
* mks-touchable.c
*
* Copyright 2023 Bilal Elmoussaoui <belmouss@redhat.com>
*
* 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 2.1 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 General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "config.h"
#include "mks-device-private.h"
#include "mks-touchable.h"
#include "mks-util-private.h"
/**
* MksTouchable:
*
* A virtualized QEMU touch device.
*/
struct _MksTouchable
{
MksDevice parent_instance;
MksQemuMultiTouch *touch;
int max_slots;
};
struct _MksTouchableClass
{
MksDeviceClass parent_instance;
};
G_DEFINE_FINAL_TYPE (MksTouchable, mks_touchable, MKS_TYPE_DEVICE)
enum {
PROP_0,
PROP_MAX_SLOTS,
N_PROPS
};
static GParamSpec *properties [N_PROPS];
static void
mks_touchable_set_max_slots (MksTouchable *self,
int max_slots)
{
g_assert (MKS_IS_TOUCHABLE (self));
// Per INPUT_EVENT_SLOTS_MIN / INPUT_EVENT_SLOTS_MAX in QEMU
g_assert (max_slots >= 0 && max_slots <= 10);
if (self->max_slots != max_slots)
{
self->max_slots = max_slots;
g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_MAX_SLOTS]);
}
}
static void
mks_touchable_touch_notify_cb (MksTouchable *self,
GParamSpec *pspec,
MksQemuMultiTouch *touch)
{
MKS_ENTRY;
g_assert (MKS_IS_TOUCHABLE (self));
g_assert (pspec != NULL);
g_assert (MKS_QEMU_IS_MULTI_TOUCH (touch));
if (strcmp (pspec->name, "max-slots") == 0)
mks_touchable_set_max_slots (self, mks_qemu_multi_touch_get_max_slots (touch));
MKS_EXIT;
}
static void
mks_touchable_set_touch (MksTouchable *self,
MksQemuMultiTouch *touch)
{
g_assert (MKS_IS_TOUCHABLE (self));
g_assert (!touch || MKS_QEMU_IS_MULTI_TOUCH (touch));
g_assert (self->touch == NULL);
if (g_set_object (&self->touch, touch))
{
g_signal_connect_object (self->touch,
"notify",
G_CALLBACK (mks_touchable_touch_notify_cb),
self,
G_CONNECT_SWAPPED);
mks_touchable_set_max_slots (self, mks_qemu_multi_touch_get_max_slots (touch));
}
}
static gboolean
mks_touchable_setup (MksDevice *device,
MksQemuObject *object)
{
MksTouchable *self = (MksTouchable *)device;
g_autolist(GDBusInterface) interfaces = NULL;
g_assert (MKS_IS_TOUCHABLE (self));
g_assert (MKS_QEMU_IS_OBJECT (object));
interfaces = g_dbus_object_get_interfaces (G_DBUS_OBJECT (object));
for (const GList *iter = interfaces; iter; iter = iter->next)
{
GDBusInterface *iface = iter->data;
if (MKS_QEMU_IS_MULTI_TOUCH (iface))
mks_touchable_set_touch (self, MKS_QEMU_MULTI_TOUCH (iface));
}
return self->touch != NULL;
}
static void
mks_touchable_dispose (GObject *object)
{
MksTouchable *self = (MksTouchable *)object;
g_clear_object (&self->touch);
G_OBJECT_CLASS (mks_touchable_parent_class)->dispose (object);
}
static void
mks_touchable_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
MksTouchable *self = MKS_TOUCHABLE (object);
switch (prop_id)
{
case PROP_MAX_SLOTS:
g_value_set_int (value, mks_touchable_get_max_slots (self));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
mks_touchable_class_init (MksTouchableClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
MksDeviceClass *device_class = MKS_DEVICE_CLASS (klass);
device_class->setup = mks_touchable_setup;
object_class->dispose = mks_touchable_dispose;
object_class->get_property = mks_touchable_get_property;
/**
* MksTouchable:max-slots:
*
* The maximum number of slots.
*/
properties [PROP_MAX_SLOTS] =
g_param_spec_int ("max-slots", NULL, NULL,
0, 10, 0,
(G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_properties (object_class, N_PROPS, properties);
}
static void
mks_touchable_init (MksTouchable *self)
{
}
static gboolean
check_touch (MksTouchable *self,
GError **error)
{
if (self->touch == NULL)
{
g_set_error_literal (error,
G_IO_ERROR,
G_IO_ERROR_NOT_CONNECTED,
"Not connected");
return FALSE;
}
return TRUE;
}
static void
mks_touchable_send_event_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
MksQemuMultiTouch *touch = (MksQemuMultiTouch *)object;
g_autoptr(GTask) task = user_data;
g_autoptr(GError) error = NULL;
MKS_ENTRY;
g_assert (MKS_QEMU_IS_MULTI_TOUCH (touch));
g_assert (G_IS_ASYNC_RESULT (result));
g_assert (G_IS_TASK (task));
if (!mks_qemu_multi_touch_call_send_event_finish (touch, result, &error))
g_task_return_error (task, g_steal_pointer (&error));
else
g_task_return_boolean (task, TRUE);
MKS_EXIT;
}
/**
* mks_touchable_send_event:
* @self: an #MksTouchable
* @num_slot: the slot number
* @x: the x absolute coordinate
* @y: the y absolute coordinate
* @cancellable: (nullable): a #GCancellable
* @callback: a #GAsyncReadyCallback to execute upon completion
* @user_data: closure data for @callback
*
* Send a touch event.
*/
void
mks_touchable_send_event (MksTouchable *self,
MksTouchEventKind kind,
guint64 num_slot,
double x,
double y,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr(GTask) task = NULL;
g_autoptr(GError) error = NULL;
MKS_ENTRY;
g_return_if_fail (MKS_IS_TOUCHABLE (self));
g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
task = g_task_new (self, cancellable, callback, user_data);
g_task_set_source_tag (task, mks_touchable_send_event);
if (!check_touch (self, &error))
g_task_return_error (task, g_steal_pointer (&error));
else
mks_qemu_multi_touch_call_send_event (self->touch, kind,
num_slot, x, y,
cancellable,
mks_touchable_send_event_cb,
g_steal_pointer (&task));
MKS_EXIT;
}
/**
* mks_touchable_send_event_finish:
* @self: a `MksTouchable`
* @result: a #GAsyncResult provided to callback
* @error: a location for a #GError, or %NULL
*
* Completes a call to [method@Mks.Touchable.send_event].
*
* Returns: %TRUE if the operation completed successfully; otherwise %FALSE
* and @error is set.
*/
gboolean
mks_touchable_send_event_finish (MksTouchable *self,
GAsyncResult *result,
GError **error)
{
gboolean ret;
MKS_ENTRY;
g_return_val_if_fail (MKS_IS_TOUCHABLE (self), FALSE);
g_return_val_if_fail (g_task_is_valid (result, self), FALSE);
ret = g_task_propagate_boolean (G_TASK (result), error);
MKS_RETURN (ret);
}
/**
* mks_touchable_send_event_sync:
* @self: a `MksTouchable`
* @kind: the event kind
* @num_slot: the slot number
* @x: the x absolute coordinate
* @y: the y absolute coordinate
* @cancellable: (nullable): a #GCancellable
* @error: a location for a #GError, or %NULL
*
* Synchronously send a touch event.
*
* Returns: %TRUE if the operation was acknowledged by the QEMU instance;
* otherwise %FALSE and @error is set.
*/
gboolean
mks_touchable_send_event_sync (MksTouchable *self,
MksTouchEventKind kind,
guint64 num_slot,
double x,
double y,
GCancellable *cancellable,
GError **error)
{
gboolean ret;
MKS_ENTRY;
g_return_val_if_fail (MKS_IS_TOUCHABLE (self), FALSE);
g_return_val_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable), FALSE);
if (!check_touch (self, error))
MKS_RETURN (FALSE);
ret = mks_qemu_multi_touch_call_send_event_sync (self->touch, kind,
num_slot, x, y,
cancellable, error);
MKS_RETURN (ret);
}
/**
* mks_touchable_get_max_slots:
* @self: A `MksTouchable`.
*
* Returns the maximum number of slots.
*/
int
mks_touchable_get_max_slots (MksTouchable *self)
{
g_return_val_if_fail (MKS_IS_TOUCHABLE (self), 0);
return self->max_slots;
}