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/*
* Copyright (C) 2011 Collabora Ltd.
*
* This program 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 program 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 program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Author: Stef Walter <stefw@collabora.co.uk>
*/
#include "config.h"
#include "gcr-memory-icon.h"
#include <string.h>
struct _GcrMemoryIconPrivate {
gpointer data;
gsize n_data;
goffset offset;
gchar *image_type;
GDestroyNotify destroy;
};
/* Forward declarations */
static void _gcr_memory_icon_iface_icon (GIconIface *iface);
static void _gcr_memory_icon_iface_loadable_icon (GLoadableIconIface *iface);
G_DEFINE_TYPE_WITH_CODE (GcrMemoryIcon, _gcr_memory_icon, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (G_TYPE_ICON, _gcr_memory_icon_iface_icon);
G_IMPLEMENT_INTERFACE (G_TYPE_LOADABLE_ICON, _gcr_memory_icon_iface_loadable_icon);
);
static void
_gcr_memory_icon_init (GcrMemoryIcon *self)
{
self->pv = (G_TYPE_INSTANCE_GET_PRIVATE (self, GCR_TYPE_MEMORY_ICON, GcrMemoryIconPrivate));
}
static void
_gcr_memory_icon_finalize (GObject *obj)
{
GcrMemoryIcon *self = GCR_MEMORY_ICON (obj);
if (self->pv->destroy)
(self->pv->destroy) (self->pv->data);
g_free (self->pv->image_type);
G_OBJECT_CLASS (_gcr_memory_icon_parent_class)->finalize (obj);
}
static void
_gcr_memory_icon_class_init (GcrMemoryIconClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
g_type_class_add_private (klass, sizeof (GcrMemoryIconPrivate));
gobject_class->finalize = _gcr_memory_icon_finalize;
}
static gboolean
_gcr_memory_icon_equal (GIcon *icon1, GIcon *icon2)
{
GcrMemoryIcon *one = GCR_MEMORY_ICON (icon1);
GcrMemoryIcon *two = GCR_MEMORY_ICON (icon2);
if (icon1 == icon2)
return TRUE;
if (!g_str_equal (one->pv->image_type, two->pv->image_type))
return FALSE;
if ((one->pv->n_data - one->pv->offset) != (two->pv->n_data - two->pv->offset))
return FALSE;
return memcmp ((guchar*)one->pv->data + one->pv->offset,
(guchar*)two->pv->data + two->pv->offset,
one->pv->n_data - one->pv->offset) == 0;
}
static guint
_gcr_memory_icon_hash (GIcon *icon)
{
GcrMemoryIcon *self = GCR_MEMORY_ICON (icon);
const signed char *p, *end;
guint32 hash;
hash = g_str_hash (self->pv->image_type);
/* Adapted from g_str_hash */
p = self->pv->data;
end = p + self->pv->n_data;
p += self->pv->offset;
while (p < end)
hash = (hash << 5) + hash + *(p++);
return hash;
}
static void
_gcr_memory_icon_iface_icon (GIconIface *iface)
{
iface->equal = _gcr_memory_icon_equal;
iface->hash = _gcr_memory_icon_hash;
}
static GInputStream *
_gcr_memory_icon_load (GLoadableIcon *icon, int size, gchar **type,
GCancellable *cancellable, GError **error)
{
GcrMemoryIcon *self = GCR_MEMORY_ICON (icon);
GInputStream *is;
if (type != NULL)
*type = g_strdup (self->pv->image_type);
is = g_memory_input_stream_new_from_data ((guchar*)self->pv->data + self->pv->offset,
self->pv->n_data, NULL);
/*
* Hold a reference to this object from the stream, so that we can rely
* on the data hanging around.
*/
g_object_set_data_full (G_OBJECT (is), "back-reference", g_object_ref (self),
g_object_unref);
return is;
}
static void
_gcr_memory_icon_load_async (GLoadableIcon *icon, int size, GCancellable *cancellable,
GAsyncReadyCallback callback, gpointer user_data)
{
GSimpleAsyncResult *res;
res = g_simple_async_result_new (G_OBJECT (icon), callback, user_data,
_gcr_memory_icon_load_async);
g_simple_async_result_complete_in_idle (res);
g_object_unref (res);
}
static GInputStream*
_gcr_memory_icon_finish (GLoadableIcon *icon, GAsyncResult *res, char **type,
GError **error)
{
g_return_val_if_fail (g_simple_async_result_is_valid (res, G_OBJECT (icon),
_gcr_memory_icon_load_async), NULL);
return _gcr_memory_icon_load (icon, 0, type, NULL, error);
}
static void
_gcr_memory_icon_iface_loadable_icon (GLoadableIconIface *iface)
{
iface->load = _gcr_memory_icon_load;
iface->load_async = _gcr_memory_icon_load_async;
iface->load_finish = _gcr_memory_icon_finish;
}
/**
* _gcr_memory_icon_new:
* @image_type: MIME content-type of the image.
* @data: Data for the image.
* @n_data: Length of data.
*
* Create a new GIcon based on image data in memory. The data will be copied
* by the new icon.
*
* Returns: (transfer full) (type Gcr.MemoryIcon): A newly allocated icon.
*/
GIcon*
_gcr_memory_icon_new (const gchar *image_type, gconstpointer data, gsize n_data)
{
g_return_val_if_fail (image_type != NULL, NULL);
g_return_val_if_fail (data != NULL, NULL);
g_return_val_if_fail (n_data != 0, NULL);
return _gcr_memory_icon_new_full (image_type, g_memdup (data, n_data),
n_data, 0, g_free);
}
/**
* _gcr_memory_icon_new_full:
* @image_type: MIME content-type of the image.
* @data: Data for the image.
* @n_data: Length of data.
* @offset: Offset of the start of the image in @data.
* @destroy: Callback to free or release @data when no longer needed.
*
* Create a new GIcon based on image data in memory. The data will be used
* directly from the @data passed. Use @destroy to control the lifetime of
* the data in memory.
*
* Returns: (transfer full): A newly allocated icon.
*/
GIcon*
_gcr_memory_icon_new_full (const gchar *image_type, gpointer data, gsize n_data,
goffset offset, GDestroyNotify destroy)
{
GcrMemoryIcon *self;
g_return_val_if_fail (image_type != NULL, NULL);
g_return_val_if_fail (data != NULL, NULL);
g_return_val_if_fail (offset < n_data, NULL);
self = g_object_new (GCR_TYPE_MEMORY_ICON, NULL);
self->pv->data = data;
self->pv->n_data = n_data;
self->pv->offset = offset;
self->pv->destroy = destroy;
self->pv->image_type = g_strdup (image_type);
return G_ICON (self);
}
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