libmks/lib/mks-screen-resizer.c

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/*
* mks-screen-resizer.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/>.
*
2023-06-01 11:04:35 +00:00
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "config.h"
#include "mks-screen-attributes.h"
#include "mks-screen-resizer-private.h"
#include "mks-util-private.h"
static void mks_screen_resizer_reconfigure (MksScreenResizer *self,
MksScreenAttributes *attributes);
struct _MksScreenResizer
{
GObject parent_instance;
MksScreen *screen;
/* Remember our last operation */
MksScreenAttributes *next_op;
MksScreenAttributes *previous_op;
guint in_progress : 1;
};
enum {
PROP_0,
PROP_SCREEN,
N_PROPS
};
G_DEFINE_FINAL_TYPE (MksScreenResizer, mks_screen_resizer, G_TYPE_OBJECT)
static GParamSpec *properties [N_PROPS];
static void
mks_screen_resizer_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
MksScreenResizer *self = MKS_SCREEN_RESIZER (object);
switch (prop_id)
{
case PROP_SCREEN:
g_value_set_object (value, self->screen);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
mks_screen_resizer_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
MksScreenResizer *self = MKS_SCREEN_RESIZER (object);
switch (prop_id)
{
case PROP_SCREEN:
mks_screen_resizer_set_screen (self, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
mks_screen_resizer_dispose (GObject *object)
{
MksScreenResizer *self = (MksScreenResizer *)object;
g_clear_object (&self->screen);
g_clear_pointer (&self->next_op, mks_screen_attributes_free);
g_clear_pointer (&self->previous_op, mks_screen_attributes_free);
G_OBJECT_CLASS (mks_screen_resizer_parent_class)->dispose (object);
}
static void
mks_screen_resizer_class_init (MksScreenResizerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->dispose = mks_screen_resizer_dispose;
object_class->get_property = mks_screen_resizer_get_property;
object_class->set_property = mks_screen_resizer_set_property;
properties[PROP_SCREEN] =
g_param_spec_object ("screen", NULL, NULL,
MKS_TYPE_SCREEN,
(G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS));
g_object_class_install_properties (object_class, N_PROPS, properties);
}
static void
on_screen_configure_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
MksScreen *screen = (MksScreen *)object;
g_autoptr(MksScreenAttributes) attributes = NULL;
g_autoptr(MksScreenResizer) self = user_data;
g_autoptr(GError) error = NULL;
MKS_ENTRY;
g_assert (MKS_IS_SCREEN (screen));
g_assert (G_IS_ASYNC_RESULT (result));
g_assert (MKS_IS_SCREEN_RESIZER (self));
if (!mks_screen_configure_finish (screen, result, &error))
g_debug ("Screen configure failed: %s", error->message);
self->in_progress = FALSE;
attributes = g_steal_pointer (&self->next_op);
if (attributes && !mks_screen_attributes_equal (attributes, self->previous_op))
mks_screen_resizer_reconfigure (self, g_steal_pointer (&attributes));
MKS_EXIT;
}
/**
* mks_screen_resizer_new:
*
* Returns: (transfer full): a new #MksScreenResizer
*/
MksScreenResizer *
mks_screen_resizer_new (void)
{
return g_object_new (MKS_TYPE_SCREEN_RESIZER, NULL);
}
static void
mks_screen_resizer_init (MksScreenResizer *self)
{
}
/**
* mks_screen_resizer_set_screen:
* @self: A `MksScreenResizer`
* @screen: A `MksScreen`
*
* Sets the screen to resize when a resize is queued.
*/
void
mks_screen_resizer_set_screen (MksScreenResizer *self,
MksScreen *screen)
{
MKS_ENTRY;
g_return_if_fail (MKS_IS_SCREEN_RESIZER (self));
g_return_if_fail (!screen || MKS_IS_SCREEN (screen));
if (g_set_object (&self->screen, screen))
g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_SCREEN]);
MKS_EXIT;
}
/**
* mks_screen_resizer_queue_resize:
* @self: A `MksScreenResizer`
* @attributes: (transfer full): The new attributes to queue
*
* Schedule the VM display configuration with the passed attributes if
* there is no ongoing operation. Otherwise, add the attributes to
* a queue of updates.
*/
void
mks_screen_resizer_queue_resize (MksScreenResizer *self,
MksScreenAttributes *attributes)
{
MKS_ENTRY;
g_return_if_fail (MKS_IS_SCREEN_RESIZER (self));
if (mks_screen_attributes_equal (attributes, self->previous_op))
MKS_EXIT;
if (self->in_progress)
{
g_clear_pointer (&self->next_op, mks_screen_attributes_free);
self->next_op = g_steal_pointer (&attributes);
MKS_EXIT;
}
mks_screen_resizer_reconfigure (self, attributes);
MKS_EXIT;
}
/**
* mks_screen_resizer_reconfigure:
* @self: A `MksScreenResizer`
* @attributes: (transfer full): The attributes to reconfigure
*
* Configure the screen with the passed attributes.
*/
static void
mks_screen_resizer_reconfigure (MksScreenResizer *self,
MksScreenAttributes *attributes)
{
MKS_ENTRY;
g_assert (MKS_IS_SCREEN_RESIZER (self));
self->in_progress = TRUE;
g_clear_pointer (&self->previous_op, mks_screen_attributes_free);
self->previous_op = mks_screen_attributes_copy (attributes);
mks_screen_configure (self->screen,
g_steal_pointer (&attributes),
NULL,
on_screen_configure_cb,
g_object_ref (self));
MKS_EXIT;
}