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<?php |
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namespace TijsVerkoyen\CssToInlineStyles\Css; |
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use DOMDocument; |
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use DOMElement; |
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use TijsVerkoyen\CssToInlineStyles\Css\Rule\Processor as RuleProcessor; |
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use TijsVerkoyen\CssToInlineStyles\Css\Rule\Rule; |
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class Processor |
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{ |
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/** |
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* Get the rules from a given CSS-string |
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* |
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* @param string $css |
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* @param Rule[] $existingRules |
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* |
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* @return Rule[] |
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*/ |
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public function getRules($css, $existingRules = array()) |
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{ |
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$css = $this->doCleanup($css); |
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$rulesProcessor = new RuleProcessor(); |
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$rules = $rulesProcessor->splitIntoSeparateRules($css); |
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return $rulesProcessor->convertArrayToObjects($rules, $existingRules); |
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} |
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/** |
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* Get the CSS from the style-tags in the given HTML-string |
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* |
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* @param string $html |
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* |
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* @return string |
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*/ |
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public function getCssFromStyleTags($html) |
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{ |
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$document = new DOMDocument('1.0', 'UTF-8'); |
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$internalErrors = libxml_use_internal_errors(true); |
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$document->loadHTML(mb_convert_encoding($html, 'HTML-ENTITIES', 'UTF-8')); |
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libxml_use_internal_errors($internalErrors); |
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$css = ''; |
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/** @var DOMElement $style */ |
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foreach ($document->getElementsByTagName('style') as $style) { |
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$css .= $this->trimHtmlComments($style->nodeValue) . "\n"; |
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} |
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return $css; |
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} |
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/** |
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* @param string $css |
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* @return string |
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*/ |
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protected function trimHtmlComments($css) |
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{ |
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$css = trim($css); |
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if (strncmp('<!--', $css, 4) === 0) { |
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$css = substr($css, 4); |
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} |
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if (strlen($css) > 3 && substr($css, -3) === '-->') { |
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$css = substr($css, 0, -3); |
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} |
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return trim($css); |
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} |
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/** |
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* @param string $css |
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* |
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* @return string |
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*/ |
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private function doCleanup($css) |
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{ |
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// remove charset |
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$css = preg_replace('/@charset "[^"]++";/', '', $css); |
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// remove media queries |
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$css = preg_replace('/@media [^{]*+{([^{}]++|{[^{}]*+})*+}/', '', $css); |
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$css = str_replace(array("\r", "\n"), '', $css); |
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$css = str_replace(array("\t"), ' ', $css); |
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$css = str_replace('"', '\'', $css); |
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$css = preg_replace('|/\*.*?\*/|', '', $css); |
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$css = preg_replace('/\s\s++/', ' ', $css); |
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$css = trim($css); |
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return $css; |
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} |
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} |
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tijsverkoyen /
CssToInlineStyles
