<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/

namespace Magento\Framework\View\Asset\PreProcessor;

use Magento\Framework\View\Asset;
use Magento\Framework\View\Url\CssResolver;

/**
* Support of notation "Module_Name::file/path.ext" in CSS-files
*
* This implementation is specific to CSS, despite that the actual algorithm of calculating offsets is generic.
* The part specific to CSS is the fact that a CSS file may refer to another file and the relative path has to be
* based off the current location of CSS-file. So context of base path can be known ONLY at the moment
* of traversing the CSS contents in context of the file location.
* Other than that, the algorithm of resolving notation "Module_Name::file/path.ext" is generic
*/
class ModuleNotation implements Asset\PreProcessorInterface
{
/**
* @var \Magento\Framework\View\Url\CssResolver
*/
private $cssResolver;

/**
* @var \Magento\Framework\View\Asset\NotationResolver\Module
*/
private $notationResolver;

/**
* @param CssResolver $cssResolver
* @param \Magento\Framework\View\Asset\NotationResolver\Module $notationResolver
*/
public function __construct(
CssResolver $cssResolver,
\Magento\Framework\View\Asset\NotationResolver\Module $notationResolver
) {
$this->cssResolver = $cssResolver;
$this->notationResolver = $notationResolver;
}

/**
* {@inheritdoc}
*/
public function process(Chain $chain)
{
$asset = $chain->getAsset();
$callback = function ($path) use ($asset) {
return $this->notationResolver->convertModuleNotationToPath($asset, $path);
};
$chain->setContent($this->cssResolver->replaceRelativeUrls($chain->getContent(), $callback));
}
}