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<?php
namespace TijsVerkoyen\CssToInlineStyles\Css;
use TijsVerkoyen\CssToInlineStyles\Css\Rule\Processor as RuleProcessor;
use TijsVerkoyen\CssToInlineStyles\Css\Rule\Rule;
class Processor
{
/**
* Get the rules from a given CSS-string
*
* @param string $css
* @param Rule[] $existingRules
*
* @return Rule[]
*/
public function getRules($css, $existingRules = array())
{
$css = $this->doCleanup($css);
$rulesProcessor = new RuleProcessor();
$rules = $rulesProcessor->splitIntoSeparateRules($css);
return $rulesProcessor->convertArrayToObjects($rules, $existingRules);
}
/**
* Get the CSS from the style-tags in the given HTML-string
*
* @param string $html
*
* @return string
*/
public function getCssFromStyleTags($html)
{
$css = '';
$matches = array();
$htmlNoComments = preg_replace('|<!--.*?-->|s', '', $html);
preg_match_all('|<style(?:\s.*)?>(.*)</style>|isU', $htmlNoComments, $matches);
if (!empty($matches[1])) {
foreach ($matches[1] as $match) {
$css .= trim($match) . "\n";
}
}
return $css;
}
/**
* @param string $css
*
* @return string
*/
private function doCleanup($css)
{
// remove charset
$css = preg_replace('/@charset "[^"]++";/', '', $css);
// remove media queries
$css = preg_replace('/@media [^{]*+{([^{}]++|{[^{}]*+})*+}/', '', $css);
$css = str_replace(array("\r", "\n"), '', $css);
$css = str_replace(array("\t"), ' ', $css);
$css = str_replace('"', '\'', $css);
$css = preg_replace('|/\*.*?\*/|', '', $css);
$css = preg_replace('/\s\s++/', ' ', $css);
$css = trim($css);
return $css;
}
}
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