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/*
* Copyright © 2018 Benjamin Otte
*
* 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 Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#include "gtkloaderprivate.h"
#include <gtk/gtk.h>
enum {
PROP_RESOURCE = 1,
};
struct _GtkLoader
{
GObject parent_instance;
GdkTexture *texture;
};
struct _GtkLoaderClass
{
GObjectClass parent_class;
};
static void
gtk_loader_paintable_snapshot (GdkPaintable *paintable,
GdkSnapshot *snapshot,
double width,
double height)
{
GtkLoader *self = GTK_LOADER (paintable);
if (self->texture)
gdk_paintable_snapshot (GDK_PAINTABLE (self->texture), snapshot, width, height);
}
static GdkPaintable *
gtk_loader_paintable_get_current_image (GdkPaintable *paintable)
{
GtkLoader *self = GTK_LOADER (paintable);
if (self->texture)
return gdk_paintable_get_current_image (GDK_PAINTABLE (self->texture));
// FIXME: return a loading image
return NULL;
}
static int
gtk_loader_paintable_get_intrinsic_width (GdkPaintable *paintable)
{
GtkLoader *self = GTK_LOADER (paintable);
if (self->texture)
return gdk_paintable_get_intrinsic_width (GDK_PAINTABLE (self->texture));
return 0;
}
static int
gtk_loader_paintable_get_intrinsic_height (GdkPaintable *paintable)
{
GtkLoader *self = GTK_LOADER (paintable);
if (self->texture)
return gdk_paintable_get_intrinsic_height (GDK_PAINTABLE (self->texture));
return 0;
}
static double
gtk_loader_paintable_get_intrinsic_aspect_ratio (GdkPaintable *paintable)
{
GtkLoader *self = GTK_LOADER (paintable);
if (self->texture)
return gdk_paintable_get_intrinsic_aspect_ratio (GDK_PAINTABLE (self->texture));
return 0;
};
static void
gtk_loader_paintable_init (GdkPaintableInterface *iface)
{
iface->snapshot = gtk_loader_paintable_snapshot;
iface->get_current_image = gtk_loader_paintable_get_current_image;
iface->get_intrinsic_width = gtk_loader_paintable_get_intrinsic_width;
iface->get_intrinsic_height = gtk_loader_paintable_get_intrinsic_height;
iface->get_intrinsic_aspect_ratio = gtk_loader_paintable_get_intrinsic_aspect_ratio;
}
G_DEFINE_TYPE_EXTENDED (GtkLoader, gtk_loader, G_TYPE_OBJECT, 0,
G_IMPLEMENT_INTERFACE (GDK_TYPE_PAINTABLE,
gtk_loader_paintable_init))
static void
gtk_loader_dispose (GObject *object)
{
GtkLoader *self = GTK_LOADER (object);
g_clear_object (&self->texture);
G_OBJECT_CLASS (gtk_loader_parent_class)->dispose (object);
}
static void gtk_loader_set_resource (GtkLoader *self, const char *resource);
static void
gtk_loader_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkLoader *self = (GtkLoader *)object;
switch (prop_id)
{
case PROP_RESOURCE:
gtk_loader_set_resource (self, g_value_get_string (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_loader_class_init (GtkLoaderClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->dispose = gtk_loader_dispose;
gobject_class->set_property = gtk_loader_set_property;
g_object_class_install_property (gobject_class, PROP_RESOURCE,
g_param_spec_string ("resource", "", "",
NULL,
G_PARAM_WRITABLE|G_PARAM_CONSTRUCT_ONLY));
}
static void
gtk_loader_init (GtkLoader *self)
{
}
static void
load_texture_in_thread (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
const char *resource = task_data;
GdkTexture *texture;
GError *error = NULL;
texture = gdk_texture_new_from_resource (resource);
if (texture)
g_task_return_pointer (task, texture, g_object_unref);
else
g_task_return_error (task, error);
}
static void
texture_finished (GObject *source,
GAsyncResult *result,
gpointer data)
{
GtkLoader *self = GTK_LOADER (source);
GdkTexture *texture;
GError *error = NULL;
texture = g_task_propagate_pointer (G_TASK (result), &error);
if (texture)
{
self->texture = g_object_ref (texture);
gdk_paintable_invalidate_size (GDK_PAINTABLE (self));
gdk_paintable_invalidate_contents (GDK_PAINTABLE (self));
}
}
static void
gtk_loader_set_resource (GtkLoader *self,
const char *resource)
{
GTask *task;
task = g_task_new (self, NULL, texture_finished, NULL);
g_task_set_task_data (task, g_strdup (resource), (GDestroyNotify)g_free);
g_task_run_in_thread (task, load_texture_in_thread);
g_object_unref (task);
}
GdkPaintable *
gtk_loader_new (void)
{
return g_object_new (GTK_TYPE_LOADER, NULL);
}
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