72 lines
2.2 KiB
PHP
72 lines
2.2 KiB
PHP
<?php
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/*
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* This file is part of the Assetic package, an OpenSky project.
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*
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* (c) 2010-2012 OpenSky Project Inc
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Assetic\Filter;
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/**
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* An abstract filter for dealing with CSS.
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*
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* @author Kris Wallsmith <kris.wallsmith@gmail.com>
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*/
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abstract class BaseCssFilter implements FilterInterface
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{
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/**
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* Filters all references -- url() and "@import" -- through a callable.
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*
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* @param string $content The CSS
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* @param mixed $callback A PHP callable
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*
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* @return string The filtered CSS
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*/
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protected function filterReferences($content, $callback, $limit = -1, & $count = 0)
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{
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$content = $this->filterUrls($content, $callback, $limit, $count);
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$content = $this->filterImports($content, $callback, $limit, $count, false);
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return $content;
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}
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/**
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* Filters all CSS url()'s through a callable.
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*
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* @param string $content The CSS
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* @param mixed $callback A PHP callable
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* @param integer $limit Limit the number of replacements
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* @param integer $count Will be populated with the count
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*
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* @return string The filtered CSS
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*/
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protected function filterUrls($content, $callback, $limit = -1, & $count = 0)
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{
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return preg_replace_callback('/url\((["\']?)(?<url>.*?)(\\1)\)/', $callback, $content, $limit, $count);
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}
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/**
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* Filters all CSS imports through a callable.
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*
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* @param string $content The CSS
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* @param mixed $callback A PHP callable
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* @param integer $limit Limit the number of replacements
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* @param integer $count Will be populated with the count
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* @param Boolean $includeUrl Whether to include url() in the pattern
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*
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* @return string The filtered CSS
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*/
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protected function filterImports($content, $callback, $limit = -1, & $count = 0, $includeUrl = true)
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{
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$pattern = $includeUrl
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? '/@import (?:url\()?(\'|"|)(?<url>[^\'"\)\n\r]*)\1\)?;?/'
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: '/@import (?!url\()(\'|"|)(?<url>[^\'"\)\n\r]*)\1;?/';
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return preg_replace_callback($pattern, $callback, $content, $limit, $count);
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}
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}
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