SimplePie_Locator::find

		$this->registry = $registry;
	}

	public function find($type = SIMPLEPIE_LOCATOR_ALL, &$working)
	{
		if ($this->is_feed($this->file))
		{
			return $this->file;
		}

		if ($this->file->method & SIMPLEPIE_FILE_SOURCE_REMOTE)
		{
			$sniffer = $this->registry->create('Content_Type_Sniffer', array($this->file));
			if ($sniffer->get_type() !== 'text/html')
			{
				return null;
			}
		}

		if ($type & ~SIMPLEPIE_LOCATOR_NONE)
		{
			$this->get_base();
		}

		if ($type & SIMPLEPIE_LOCATOR_AUTODISCOVERY && $working = $this->autodiscovery())
		{
			return $working[0];
		}

		if ($type & (SIMPLEPIE_LOCATOR_LOCAL_EXTENSION | SIMPLEPIE_LOCATOR_LOCAL_BODY | SIMPLEPIE_LOCATOR_REMOTE_EXTENSION | SIMPLEPIE_LOCATOR_REMOTE_BODY) && $this->get_links())
		{
			if ($type & SIMPLEPIE_LOCATOR_LOCAL_EXTENSION && $working = $this->extension($this->local))
			{
				return $working[0];
			}

			if ($type & SIMPLEPIE_LOCATOR_LOCAL_BODY && $working = $this->body($this->local))
			{
				return $working[0];
			}

			if ($type & SIMPLEPIE_LOCATOR_REMOTE_EXTENSION && $working = $this->extension($this->elsewhere))
			{
				return $working[0];
			}

			if ($type & SIMPLEPIE_LOCATOR_REMOTE_BODY && $working = $this->body($this->elsewhere))
			{
				return $working[0];
			}