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<?php
/**
* This file is part of phpDocumentor.
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @copyright 2010-2015 Mike van Riel<mike@phpdoc.org>
* @license http://www.opensource.org/licenses/mit-license.php MIT
* @link http://phpdoc.org
*/
namespace phpDocumentor\Reflection\DocBlock;
use phpDocumentor\Reflection\DocBlock\Tags\Formatter;
use phpDocumentor\Reflection\DocBlock\Tags\Formatter\PassthroughFormatter;
use Webmozart\Assert\Assert;
/**
* Object representing to description for a DocBlock.
*
* A Description object can consist of plain text but can also include tags. A Description Formatter can then combine
* a body template with sprintf-style placeholders together with formatted tags in order to reconstitute a complete
* description text using the format that you would prefer.
*
* Because parsing a Description text can be a verbose process this is handled by the {@see DescriptionFactory}. It is
* thus recommended to use that to create a Description object, like this:
*
* $description = $descriptionFactory->create('This is a {@see Description}', $context);
*
* The description factory will interpret the given body and create a body template and list of tags from them, and pass
* that onto the constructor if this class.
*
* > The $context variable is a class of type {@see \phpDocumentor\Reflection\Types\Context} and contains the namespace
* > and the namespace aliases that apply to this DocBlock. These are used by the Factory to resolve and expand partial
* > type names and FQSENs.
*
* If you do not want to use the DescriptionFactory you can pass a body template and tag listing like this:
*
* $description = new Description(
* 'This is a %1$s',
* [ new See(new Fqsen('\phpDocumentor\Reflection\DocBlock\Description')) ]
* );
*
* It is generally recommended to use the Factory as that will also apply escaping rules, while the Description object
* is mainly responsible for rendering.
*
* @see DescriptionFactory to create a new Description.
* @see Description\Formatter for the formatting of the body and tags.
*/
class Description
{
/** @var string */
private $bodyTemplate;
/** @var Tag[] */
private $tags;
/**
* Initializes a Description with its body (template) and a listing of the tags used in the body template.
*
* @param string $bodyTemplate
* @param Tag[] $tags
*/
public function __construct($bodyTemplate, array $tags = [])
{
Assert::string($bodyTemplate);
$this->bodyTemplate = $bodyTemplate;
$this->tags = $tags;
}
/**
* Renders this description as a string where the provided formatter will format the tags in the expected string
* format.
*
* @param Formatter|null $formatter
*
* @return string
*/
public function render(Formatter $formatter = null)
{
if ($formatter === null) {
$formatter = new PassthroughFormatter();
}
$tags = [];
foreach ($this->tags as $tag) {
$tags[] = '{' . $formatter->format($tag) . '}';
}
return vsprintf($this->bodyTemplate, $tags);
}
/**
* Returns a plain string representation of this description.
*
* @return string
*/
public function __toString()
{
return $this->render();
}
}
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