Subversion-Projekte lars-tiefland.php_share

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Revision Autor Zeilennr. Zeile
1 lars 1 
<?php
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/**
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 * "Singleton"
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 */
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class CSSCache {
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  function get() {
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    global $__g_css_manager;
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    if (!isset($__g_css_manager)) {
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      $__g_css_manager = new CSSCache();
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    };
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    return $__g_css_manager;
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  }
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  function _getCacheFilename($url) {
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    return CACHE_DIR.md5($url).'.css.compiled';
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  }
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  function _isCached($url) {
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    $cache_filename = $this->_getCacheFilename($url);
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    return is_readable($cache_filename);
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  }
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  function &_readCached($url) {
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    $cache_filename = $this->_getCacheFilename($url);
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    $obj = unserialize(file_get_contents($cache_filename));
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    return $obj;
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  }
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  function _putCached($url, $css) {
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    file_put_contents($this->_getCacheFilename($url), serialize($css));
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  }
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  function &compile($url, $css, &$pipeline) {
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    if ($this->_isCached($url)) {
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      return $this->_readCached($url);
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    } else {
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      $cssruleset = new CSSRuleset();
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      $cssruleset->parse_css($css, $pipeline);
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      $this->_putCached($url, $cssruleset);
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      return $cssruleset;
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    };
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  }
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}
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?>