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/*
* e-photo-source.c
*
* 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 of the License, or (at your option) version 3.
*
* 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 the program; if not, see <http://www.gnu.org/licenses/>
*
*/
/**
* SECTION: e-photo-source
* @include: e-util/e-util.h
* @short_description: A source of email address photos
*
* #EPhotoSource is an interface used to extend the functionality of
* #EPhotoCache. You can add an object implementing #EPhotoSource to an
* #EPhotoCache with e_photo_cache_add_photo_source() and remove it with
* e_photo_cache_remove_photo_source(). When #EPhotoCache needs a photo
* for an email addres, it will invoke e_photo_source_get_photo() on all
* available #EPhotoSource objects simultaneously and select one photo.
**/
#include "e-photo-source.h"
G_DEFINE_INTERFACE (
EPhotoSource,
e_photo_source,
G_TYPE_OBJECT)
static void
e_photo_source_default_init (EPhotoSourceInterface *interface)
{
}
/**
* e_photo_source_get_photo:
* @photo_source: an #EPhotoSource
* @email_address: an email address
* @cancellable: optional #GCancellable object, or %NULL
* @callback: a #GAsyncReadyCallback to call when the request is satisfied
* @user_data: data to pass to the callback function
*
* Asynchronously searches for a photo or logo for @email_address.
*
* When the operation is finished, @callback will be called. You can then
* call e_photo_source_get_photo_finish() to get the result of the operation.
**/
void
e_photo_source_get_photo (EPhotoSource *photo_source,
const gchar *email_address,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
EPhotoSourceInterface *interface;
g_return_if_fail (E_IS_PHOTO_SOURCE (photo_source));
g_return_if_fail (email_address != NULL);
interface = E_PHOTO_SOURCE_GET_INTERFACE (photo_source);
g_return_if_fail (interface->get_photo != NULL);
interface->get_photo (
photo_source, email_address,
cancellable, callback, user_data);
}
/**
* e_photo_source_get_photo_finish:
* @photo_source: an #EPhotoSource
* @result: a #GAsyncResult
* @out_stream: return location for a #GInputStream
* @out_priority: return location for a priority value, or %NULL
* @error: return location for a #GError, or %NULL
*
* Finishes the operation started with e_photo_source_get_photo().
*
* If a match was found, a #GInputStream from which to read image data is
* returned through the @out_stream return location, and a suggested priority
* value for the match is returned through the @out_priority return location.
*
* You can use the @out_priority value to rank this result among other
* #EPhotoSource results. The value is usually @G_PRIORITY_DEFAULT, but
* may be @G_PRIORITY_LOW if the result is a fallback image.
*
* If no match was found, the @out_stream return location is set to %NULL
* (the @out_priority return location will remain unset).
*
* The return value indicates whether the search completed successfully,
* not whether a match was found. If an error occurred, the function will
* set @error and return %FALSE.
*
* Returns: whether the search completed successfully
**/
gboolean
e_photo_source_get_photo_finish (EPhotoSource *photo_source,
GAsyncResult *result,
GInputStream **out_stream,
gint *out_priority,
GError **error)
{
EPhotoSourceInterface *interface;
g_return_val_if_fail (E_IS_PHOTO_SOURCE (photo_source), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
g_return_val_if_fail (out_stream != NULL, FALSE);
interface = E_PHOTO_SOURCE_GET_INTERFACE (photo_source);
g_return_val_if_fail (interface->get_photo_finish != NULL, FALSE);
return interface->get_photo_finish (
photo_source, result, out_stream, out_priority, error);
}
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