Method start

Telegram/SourceFiles/data/data_media_preload.cpp:70–80

}

void PhotoPreload::start(FileOrigin origin) {
	if (_photo->loaded()) {
		callDone();
	} else {
		_photo->owner()->load(origin, LoadFromCloudOrLocal, true);
		_photo->owner()->session().downloaderTaskFinished(
		) | rpl::filter([=] {
			return _photo->loaded();
		}) | rpl::on_next([=] { callDone(); }, _lifetime);
	}
}

VideoPreload::VideoPreload(
	not_null<DocumentData*> video,