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<?php |
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namespace voku\CssToInlineStyles; |
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use Symfony\Component\CssSelector\CssSelectorConverter; |
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use Symfony\Component\CssSelector\Exception\ExceptionInterface; |
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/** |
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* CSS to Inline Styles class |
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* |
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* @author Tijs Verkoyen <[email protected]> |
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*/ |
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class CssToInlineStyles |
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{ |
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/** |
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* regular expression: css media queries |
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* |
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* @var string |
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*/ |
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private static $cssMediaQueriesRegEx = '#@media\\s+(?:only\\s)?(?:[\\s{\\(]|screen|all)\\s?[^{]+{.*}\\s*}\\s*#misU'; |
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/** |
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* regular expression: css charset |
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* |
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* @var string |
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*/ |
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private static $cssCharsetRegEx = '/@charset [\'"][^\'"]+[\'"];/i'; |
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/** |
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* regular expression: conditional inline style tags |
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* |
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* @var string |
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*/ |
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private static $excludeConditionalInlineStylesBlockRegEx = '/<!--.*<style.*-->/isU'; |
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/** |
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* regular expression: inline style tags |
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* |
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* @var string |
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*/ |
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private static $styleTagRegEx = '|<style(.*)>(.*)</style>|isU'; |
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/** |
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* regular expression: css-comments |
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* |
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* @var string |
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*/ |
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private static $styleCommentRegEx = '/\\/\\*.*\\*\\//sU'; |
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/** |
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* The CSS to use |
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* |
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* @var string |
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*/ |
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private $css; |
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/** |
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* Should the generated HTML be cleaned |
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* |
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* @var bool |
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*/ |
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private $cleanup = false; |
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/** |
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* The encoding to use. |
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* |
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* @var string |
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*/ |
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private $encoding = 'UTF-8'; |
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/** |
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* The HTML to process |
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* |
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* @var string |
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*/ |
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private $html; |
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/** |
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* Use inline-styles block as CSS |
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* |
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* @var bool |
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*/ |
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private $useInlineStylesBlock = false; |
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/** |
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* Use link block reference as CSS |
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* |
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* @var bool |
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*/ |
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private $loadCSSFromHTML = false; |
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/** |
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* Strip original style tags |
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* |
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* @var bool |
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*/ |
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private $stripOriginalStyleTags = false; |
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/** |
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* Exclude conditional inline-style blocks |
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* |
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* @var bool |
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*/ |
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private $excludeConditionalInlineStylesBlock = true; |
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/** |
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* Exclude media queries from "$this->css" and keep media queries for inline-styles blocks |
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* |
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* @var bool |
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*/ |
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private $excludeMediaQueries = true; |
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/** |
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* Exclude media queries from "$this->css" and keep media queries for inline-styles blocks |
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* |
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* @var bool |
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*/ |
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private $excludeCssCharset = true; |
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/** |
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* Creates an instance, you could set the HTML and CSS here, or load it |
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* later. |
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* |
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* @param null|string $html The HTML to process. |
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* @param null|string $css The CSS to use. |
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*/ |
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public function __construct($html = null, $css = null) |
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{ |
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if (null !== $html) { |
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$this->setHTML($html); |
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} |
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if (null !== $css) { |
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$this->setCSS($css); |
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} |
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} |
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/** |
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* Set HTML to process |
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* |
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* @param string $html The HTML to process. |
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*/ |
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public function setHTML($html) |
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{ |
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// strip style definitions, if we use css-class "cleanup" on a style-element |
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$this->html = (string)preg_replace('/<style[^>]+class="cleanup"[^>]*>.*<\/style>/Usi', ' ', $html); |
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} |
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/** |
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* Set CSS to use |
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* |
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* @param string $css The CSS to use. |
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*/ |
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public function setCSS($css) |
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{ |
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$this->css = (string)$css; |
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} |
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/** |
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* Sort an array on the specificity element |
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* |
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* @return int |
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* |
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* @param Specificity[] $e1 The first element. |
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* @param Specificity[] $e2 The second element. |
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*/ |
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private static function sortOnSpecificity($e1, $e2) |
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{ |
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// Compare the specificity |
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$value = $e1['specificity']->compareTo($e2['specificity']); |
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// if the specificity is the same, use the order in which the element appeared |
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if (0 === $value) { |
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$value = $e1['order'] - $e2['order']; |
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} |
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return $value; |
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} |
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/** |
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* Converts the loaded HTML into an HTML-string with inline styles based on the loaded CSS |
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* |
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* @param bool $outputXHTML [optional] Should we output valid XHTML? |
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* @param int $libXMLOptions [optional] $libXMLOptions Since PHP 5.4.0 and Libxml 2.6.0, |
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* you may also use the options parameter to specify additional |
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* Libxml parameters. Recommend these options: |
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* LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD |
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* @param bool $path [optional] Set the path to your external css-files. |
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* |
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* @return string |
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* |
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* @throws Exception |
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*/ |
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public function convert($outputXHTML = false, $libXMLOptions = 0, $path = false) |
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{ |
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// redefine |
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$outputXHTML = (bool)$outputXHTML; |
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// validate |
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if (!$this->html) { |
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throw new Exception('No HTML provided.'); |
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} |
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// use local variables |
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$css = $this->css; |
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// create new DOMDocument |
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$document = $this->createDOMDocument($this->html, $libXMLOptions); |
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// check if there is some link css reference |
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if ($this->loadCSSFromHTML) { |
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foreach ($document->getElementsByTagName('link') as $node) { |
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/** @noinspection PhpUndefinedMethodInspection */ |
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$file = ($path ?: __DIR__) . '/' . $node->getAttribute('href'); |
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if (file_exists($file)) { |
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$css .= file_get_contents($file); |
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// converting to inline css because we don't need/want to load css files, so remove the link |
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$node->parentNode->removeChild($node); |
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} |
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} |
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} |
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// should we use inline style-block |
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if ($this->useInlineStylesBlock) { |
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if (true === $this->excludeConditionalInlineStylesBlock) { |
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$this->html = preg_replace(self::$excludeConditionalInlineStylesBlockRegEx, '', $this->html); |
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} |
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$css .= $this->getCssFromInlineHtmlStyleBlock($this->html); |
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} |
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// process css |
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$cssRules = $this->processCSS($css); |
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// create new XPath |
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$xPath = $this->createXPath($document, $cssRules); |
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// strip original style tags if we need to |
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if ($this->stripOriginalStyleTags === true) { |
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$this->stripOriginalStyleTags($xPath); |
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} |
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// cleanup the HTML if we need to |
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if (true === $this->cleanup) { |
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$this->cleanupHTML($xPath); |
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} |
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// should we output XHTML? |
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if (true === $outputXHTML) { |
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// set formatting |
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$document->formatOutput = true; |
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// get the HTML as XML |
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$xml = $document->saveXML(null, LIBXML_NOEMPTYTAG); |
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$xml = $this->putReplacedAmperstampBackToPreserveHtmlEntities($xml); |
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// remove the XML-header |
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return ltrim(preg_replace('/<\?xml.*\?>/', '', $xml)); |
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} |
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// just regular HTML 4.01 as it should be used in newsletters |
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$html = $document->saveHTML(); |
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$html = $this->putReplacedAmperstampBackToPreserveHtmlEntities($html); |
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return $html; |
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} |
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/** |
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* get css from inline-html style-block |
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* |
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* @param string $html |
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* |
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* @return string |
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*/ |
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public function getCssFromInlineHtmlStyleBlock($html) |
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{ |
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// init var |
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$css = ''; |
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$matches = array(); |
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// match the style blocks |
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preg_match_all(self::$styleTagRegEx, $html, $matches); |
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// any style-blocks found? |
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if (!empty($matches[2])) { |
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// add |
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foreach ($matches[2] as $match) { |
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$css .= trim($match) . "\n"; |
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} |
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} |
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return $css; |
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} |
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/** |
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* Process the loaded CSS |
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* |
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* @param $css |
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* |
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* @return array |
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*/ |
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private function processCSS($css) |
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{ |
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//reset current set of rules |
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$cssRules = array(); |
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// init vars |
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$css = (string)$css; |
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$css = $this->doCleanup($css); |
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// rules are splitted by } |
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$rules = (array)explode('}', $css); |
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// init var |
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$i = 1; |
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// loop rules |
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foreach ($rules as $rule) { |
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// split into chunks |
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$chunks = explode('{', $rule); |
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// invalid rule? |
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if (!isset($chunks[1])) { |
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continue; |
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} |
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// set the selectors |
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$selectors = trim($chunks[0]); |
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// get cssProperties |
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$cssProperties = trim($chunks[1]); |
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// split multiple selectors |
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$selectors = (array)explode(',', $selectors); |
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// loop selectors |
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foreach ($selectors as $selector) { |
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// cleanup |
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$selector = trim($selector); |
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// build an array for each selector |
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$ruleSet = array(); |
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// store selector |
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$ruleSet['selector'] = $selector; |
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// process the properties |
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$ruleSet['properties'] = $this->processCSSProperties($cssProperties); |
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// calculate specificity |
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$ruleSet['specificity'] = Specificity::fromSelector($selector); |
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// remember the order in which the rules appear |
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$ruleSet['order'] = $i; |
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// add into rules |
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$cssRules[] = $ruleSet; |
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// increment |
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$i++; |
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} |
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} |
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// sort based on specificity |
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if (0 !== count($cssRules)) { |
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usort($cssRules, array(__CLASS__, 'sortOnSpecificity')); |
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} |
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return $cssRules; |
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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 newlines & replace double quotes by single quotes |
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44 |
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$css = str_replace( |
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array("\r", "\n", '"'), |
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44 |
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array('', '', '\''), |
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$css |
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); |
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// remove comments |
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$css = preg_replace(self::$styleCommentRegEx, '', $css); |
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// remove spaces |
397
|
44 |
|
$css = preg_replace('/\s\s+/', ' ', $css); |
398
|
|
|
|
399
|
|
|
// remove css charset |
400
|
44 |
|
if (true === $this->excludeCssCharset) { |
401
|
44 |
|
$css = $this->stripeCharsetInCss($css); |
402
|
44 |
|
} |
403
|
|
|
|
404
|
|
|
// remove css media queries |
405
|
44 |
|
if (true === $this->excludeMediaQueries) { |
406
|
43 |
|
$css = $this->stripeMediaQueries($css); |
407
|
43 |
|
} |
408
|
|
|
|
409
|
44 |
|
return (string)$css; |
410
|
|
|
} |
411
|
|
|
|
412
|
|
|
/** |
413
|
|
|
* remove css media queries from the string |
414
|
|
|
* |
415
|
|
|
* @param string $css |
416
|
|
|
* |
417
|
|
|
* @return string |
418
|
|
|
*/ |
419
|
43 |
|
private function stripeMediaQueries($css) |
420
|
|
|
{ |
421
|
|
|
// remove comments previously to matching media queries |
422
|
43 |
|
$css = preg_replace(self::$styleCommentRegEx, '', $css); |
423
|
|
|
|
424
|
43 |
|
return (string)preg_replace(self::$cssMediaQueriesRegEx, '', $css); |
425
|
|
|
} |
426
|
|
|
|
427
|
|
|
/** |
428
|
|
|
* remove charset from the string |
429
|
|
|
* |
430
|
|
|
* @param $css |
431
|
|
|
* |
432
|
|
|
* @return string |
433
|
|
|
*/ |
434
|
44 |
|
private function stripeCharsetInCss($css) |
435
|
|
|
{ |
436
|
44 |
|
return (string)preg_replace(self::$cssCharsetRegEx, '', $css); |
437
|
|
|
} |
438
|
|
|
|
439
|
|
|
/** |
440
|
|
|
* Process the CSS-properties |
441
|
|
|
* |
442
|
|
|
* @return array |
443
|
|
|
* |
444
|
|
|
* @param string $propertyString The CSS-properties. |
445
|
|
|
*/ |
446
|
33 |
|
private function processCSSProperties($propertyString) |
447
|
|
|
{ |
448
|
|
|
// split into chunks |
449
|
33 |
|
$properties = $this->splitIntoProperties($propertyString); |
450
|
|
|
|
451
|
|
|
// init var |
452
|
33 |
|
$pairs = array(); |
453
|
|
|
|
454
|
|
|
// loop properties |
455
|
33 |
|
foreach ($properties as $property) { |
456
|
|
|
// split into chunks |
457
|
33 |
|
$chunks = (array)explode(':', $property, 2); |
458
|
|
|
|
459
|
|
|
// validate |
460
|
33 |
|
if (!isset($chunks[1])) { |
461
|
27 |
|
continue; |
462
|
|
|
} |
463
|
|
|
|
464
|
|
|
// cleanup |
465
|
32 |
|
$chunks[0] = trim($chunks[0]); |
466
|
32 |
|
$chunks[1] = trim($chunks[1]); |
467
|
|
|
|
468
|
|
|
// add to pairs array |
469
|
|
|
if ( |
470
|
32 |
|
!isset($pairs[$chunks[0]]) |
471
|
32 |
|
|| |
472
|
3 |
|
!in_array($chunks[1], $pairs[$chunks[0]], true) |
473
|
32 |
|
) { |
474
|
32 |
|
$pairs[$chunks[0]][] = $chunks[1]; |
475
|
32 |
|
} |
476
|
33 |
|
} |
477
|
|
|
|
478
|
|
|
// sort the pairs |
479
|
33 |
|
ksort($pairs); |
480
|
|
|
|
481
|
|
|
// return |
482
|
33 |
|
return $pairs; |
483
|
|
|
} |
484
|
|
|
|
485
|
|
|
/** |
486
|
|
|
* Split a style string into an array of properties. |
487
|
|
|
* The returned array can contain empty strings. |
488
|
|
|
* |
489
|
|
|
* @param string $styles ex: 'color:blue;font-size:12px;' |
490
|
|
|
* |
491
|
|
|
* @return array an array of strings containing css property ex: array('color:blue','font-size:12px') |
492
|
|
|
*/ |
493
|
33 |
|
private function splitIntoProperties($styles) |
494
|
|
|
{ |
495
|
33 |
|
$properties = (array)explode(';', $styles); |
496
|
33 |
|
$propertiesCount = count($properties); |
497
|
|
|
|
498
|
|
|
/** @noinspection ForeachInvariantsInspection */ |
499
|
33 |
|
for ($i = 0; $i < $propertiesCount; $i++) { |
500
|
|
|
// If next property begins with base64, |
501
|
|
|
// Then the ';' was part of this property (and we should not have split on it). |
502
|
|
|
if ( |
503
|
33 |
|
isset($properties[$i + 1]) |
504
|
33 |
|
&& |
505
|
26 |
|
strpos($properties[$i + 1], 'base64,') !== false |
506
|
33 |
|
) { |
507
|
1 |
|
$properties[$i] .= ';' . $properties[$i + 1]; |
508
|
1 |
|
$properties[$i + 1] = ''; |
509
|
1 |
|
++$i; |
510
|
1 |
|
} |
511
|
33 |
|
} |
512
|
|
|
|
513
|
33 |
|
return $properties; |
514
|
|
|
} |
515
|
|
|
|
516
|
|
|
/** |
517
|
|
|
* create DOMDocument from HTML |
518
|
|
|
* |
519
|
|
|
* @param string $html |
520
|
|
|
* @param int $libXMLOptions |
521
|
|
|
* |
522
|
|
|
* @return \DOMDocument |
523
|
|
|
*/ |
524
|
44 |
|
private function createDOMDocument($html, $libXMLOptions = 0) |
525
|
|
|
{ |
526
|
|
|
// create new DOMDocument |
527
|
44 |
|
$document = new \DOMDocument('1.0', $this->getEncoding()); |
528
|
|
|
|
529
|
|
|
// DOMDocument settings |
530
|
44 |
|
$document->preserveWhiteSpace = false; |
531
|
44 |
|
$document->formatOutput = true; |
532
|
|
|
|
533
|
|
|
// set error level |
534
|
44 |
|
$internalErrors = libxml_use_internal_errors(true); |
535
|
|
|
|
536
|
44 |
|
$html = $this->replaceAmperstampToPreserveHtmlEntities($html); |
537
|
|
|
|
538
|
|
|
// UTF-8 hack: http://php.net/manual/en/domdocument.loadhtml.php#95251 |
539
|
44 |
|
$html = trim($html); |
540
|
44 |
|
$xmlHackUsed = false; |
541
|
44 |
|
if (stripos('<?xml', $html) !== 0) { |
542
|
44 |
|
$xmlHackUsed = true; |
543
|
44 |
|
$html = '<?xml encoding="' . $this->getEncoding() . '" ?>' . $html; |
544
|
44 |
|
} |
545
|
|
|
|
546
|
|
|
// load HTML |
547
|
44 |
|
if ($libXMLOptions !== 0) { |
548
|
|
|
$document->loadHTML($html, $libXMLOptions); |
549
|
|
|
} else { |
550
|
44 |
|
$document->loadHTML($html); |
551
|
|
|
} |
552
|
|
|
|
553
|
|
|
// remove the "xml-encoding" hack |
554
|
44 |
|
if ($xmlHackUsed === true) { |
555
|
44 |
|
foreach ($document->childNodes as $child) { |
556
|
44 |
|
if ($child->nodeType == XML_PI_NODE) { |
557
|
44 |
|
$document->removeChild($child); |
558
|
44 |
|
} |
559
|
44 |
|
} |
560
|
44 |
|
} |
561
|
|
|
|
562
|
|
|
// set encoding |
563
|
44 |
|
$document->encoding = $this->getEncoding(); |
564
|
|
|
|
565
|
|
|
// restore error level |
566
|
44 |
|
libxml_use_internal_errors($internalErrors); |
567
|
|
|
|
568
|
44 |
|
return $document; |
569
|
|
|
} |
570
|
|
|
|
571
|
|
|
/** |
572
|
|
|
* Get the encoding to use |
573
|
|
|
* |
574
|
|
|
* @return string |
575
|
|
|
*/ |
576
|
44 |
|
private function getEncoding() |
577
|
|
|
{ |
578
|
44 |
|
return $this->encoding; |
579
|
|
|
} |
580
|
|
|
|
581
|
|
|
/** |
582
|
|
|
* create XPath |
583
|
|
|
* |
584
|
|
|
* @param \DOMDocument $document |
585
|
|
|
* @param array $cssRules |
586
|
|
|
* |
587
|
|
|
* @return \DOMXPath |
588
|
|
|
*/ |
589
|
44 |
|
private function createXPath(\DOMDocument $document, array $cssRules) |
590
|
|
|
{ |
591
|
44 |
|
$xPath = new \DOMXPath($document); |
592
|
|
|
|
593
|
|
|
// any rules? |
594
|
44 |
|
if (0 !== count($cssRules)) { |
595
|
|
|
// loop rules |
596
|
33 |
|
foreach ($cssRules as $rule) { |
597
|
|
|
|
598
|
|
|
try { |
599
|
33 |
|
$converter = new CssSelectorConverter(); |
600
|
33 |
|
$query = $converter->toXPath($rule['selector']); |
601
|
33 |
|
} catch (ExceptionInterface $e) { |
602
|
4 |
|
$query = null; |
603
|
|
|
} |
604
|
33 |
|
$converter = null; |
605
|
|
|
|
606
|
|
|
// validate query |
607
|
33 |
|
if (null === $query) { |
608
|
4 |
|
continue; |
609
|
|
|
} |
610
|
|
|
|
611
|
|
|
// search elements |
612
|
31 |
|
$elements = $xPath->query($query); |
613
|
|
|
|
614
|
|
|
// validate elements |
615
|
31 |
|
if (false === $elements) { |
616
|
|
|
continue; |
617
|
|
|
} |
618
|
|
|
|
619
|
|
|
// loop found elements |
620
|
31 |
|
foreach ($elements as $element) { |
621
|
|
|
|
622
|
|
|
/** |
623
|
|
|
* @var $element \DOMElement |
624
|
|
|
*/ |
625
|
|
|
|
626
|
|
|
// no styles stored? |
627
|
31 |
|
if (null === $element->attributes->getNamedItem('data-css-to-inline-styles-original-styles')) { |
628
|
|
|
|
629
|
|
|
// init var |
630
|
31 |
|
$originalStyle = ''; |
631
|
|
|
|
632
|
31 |
|
if (null !== $element->attributes->getNamedItem('style')) { |
633
|
|
|
/** @noinspection PhpUndefinedFieldInspection */ |
634
|
8 |
|
$originalStyle = $element->attributes->getNamedItem('style')->value; |
635
|
8 |
|
} |
636
|
|
|
|
637
|
|
|
// store original styles |
638
|
31 |
|
$element->setAttribute('data-css-to-inline-styles-original-styles', $originalStyle); |
639
|
|
|
|
640
|
|
|
// clear the styles |
641
|
31 |
|
$element->setAttribute('style', ''); |
642
|
31 |
|
} |
643
|
|
|
|
644
|
31 |
|
$propertiesString = $this->createPropertyChunks($element, $rule['properties']); |
645
|
|
|
|
646
|
|
|
// set attribute |
647
|
31 |
|
if ('' != $propertiesString) { |
648
|
31 |
|
$element->setAttribute('style', $propertiesString); |
649
|
31 |
|
} |
650
|
31 |
|
} |
651
|
33 |
|
} |
652
|
|
|
|
653
|
|
|
// reapply original styles |
654
|
|
|
// search elements |
655
|
33 |
|
$elements = $xPath->query('//*[@data-css-to-inline-styles-original-styles]'); |
656
|
|
|
|
657
|
|
|
// loop found elements |
658
|
33 |
|
foreach ($elements as $element) { |
659
|
|
|
// get the original styles |
660
|
|
|
/** @noinspection PhpUndefinedFieldInspection */ |
661
|
31 |
|
$originalStyle = $element->attributes->getNamedItem('data-css-to-inline-styles-original-styles')->value; |
662
|
|
|
|
663
|
31 |
|
if ('' != $originalStyle) { |
664
|
8 |
|
$originalStyles = $this->splitIntoProperties($originalStyle); |
665
|
|
|
|
666
|
8 |
|
$originalProperties = $this->splitStyleIntoChunks($originalStyles); |
667
|
|
|
|
668
|
8 |
|
$propertiesString = $this->createPropertyChunks($element, $originalProperties); |
669
|
|
|
|
670
|
|
|
// set attribute |
671
|
8 |
|
if ('' != $propertiesString) { |
672
|
8 |
|
$element->setAttribute('style', $propertiesString); |
673
|
8 |
|
} |
674
|
8 |
|
} |
675
|
|
|
|
676
|
|
|
// remove placeholder |
677
|
31 |
|
$element->removeAttribute('data-css-to-inline-styles-original-styles'); |
678
|
33 |
|
} |
679
|
33 |
|
} |
680
|
|
|
|
681
|
44 |
|
return $xPath; |
682
|
|
|
} |
683
|
|
|
|
684
|
|
|
/** |
685
|
|
|
* @param \DOMElement $element |
686
|
|
|
* @param array $ruleProperties |
687
|
|
|
* |
688
|
|
|
* @return array |
689
|
|
|
*/ |
690
|
31 |
|
private function createPropertyChunks(\DOMElement $element, array $ruleProperties) |
691
|
|
|
{ |
692
|
|
|
// init var |
693
|
31 |
|
$properties = array(); |
694
|
|
|
|
695
|
|
|
// get current styles |
696
|
31 |
|
$stylesAttribute = $element->attributes->getNamedItem('style'); |
697
|
|
|
|
698
|
|
|
// any styles defined before? |
699
|
31 |
|
if (null !== $stylesAttribute) { |
700
|
|
|
// get value for the styles attribute |
701
|
|
|
/** @noinspection PhpUndefinedFieldInspection */ |
702
|
31 |
|
$definedStyles = (string)$stylesAttribute->value; |
703
|
|
|
|
704
|
|
|
// split into properties |
705
|
31 |
|
$definedProperties = $this->splitIntoProperties($definedStyles); |
706
|
|
|
|
707
|
31 |
|
$properties = $this->splitStyleIntoChunks($definedProperties); |
708
|
31 |
|
} |
709
|
|
|
|
710
|
|
|
// add new properties into the list |
711
|
31 |
|
foreach ($ruleProperties as $key => $value) { |
712
|
|
|
// If one of the rules is already set and is !important, don't apply it, |
713
|
|
|
// except if the new rule is also important. |
714
|
|
|
if ( |
715
|
31 |
|
!isset($properties[$key]) |
716
|
31 |
|
|| |
717
|
9 |
|
false === stripos($properties[$key], '!important') |
718
|
9 |
|
|| |
719
|
4 |
|
false !== stripos(implode('', (array)$value), '!important') |
720
|
31 |
|
) { |
721
|
31 |
|
$properties[$key] = $value; |
722
|
31 |
|
} |
723
|
31 |
|
} |
724
|
|
|
|
725
|
|
|
// build string |
726
|
31 |
|
$propertyChunks = array(); |
727
|
|
|
|
728
|
|
|
// build chunks |
729
|
31 |
|
foreach ($properties as $key => $values) { |
730
|
31 |
|
foreach ((array)$values as $value) { |
731
|
31 |
|
$propertyChunks[] = $key . ': ' . $value . ';'; |
732
|
31 |
|
} |
733
|
31 |
|
} |
734
|
|
|
|
735
|
31 |
|
return implode(' ', $propertyChunks); |
736
|
|
|
} |
737
|
|
|
|
738
|
|
|
/** |
739
|
|
|
* @param array $definedProperties |
740
|
|
|
* |
741
|
|
|
* @return array |
742
|
|
|
*/ |
743
|
31 |
|
private function splitStyleIntoChunks(array $definedProperties) |
744
|
|
|
{ |
745
|
|
|
// init var |
746
|
31 |
|
$properties = array(); |
747
|
|
|
|
748
|
|
|
// loop properties |
749
|
31 |
|
foreach ($definedProperties as $property) { |
750
|
|
|
// validate property |
751
|
|
|
if ( |
752
|
|
|
!$property |
753
|
31 |
|
|| |
754
|
16 |
|
strpos($property, ':') === false |
755
|
31 |
|
) { |
756
|
31 |
|
continue; |
757
|
|
|
} |
758
|
|
|
|
759
|
|
|
// split into chunks |
760
|
16 |
|
$chunks = (array)explode(':', trim($property), 2); |
761
|
|
|
|
762
|
|
|
// validate |
763
|
16 |
|
if (!isset($chunks[1])) { |
764
|
|
|
continue; |
765
|
|
|
} |
766
|
|
|
|
767
|
|
|
// loop chunks |
768
|
16 |
|
$properties[$chunks[0]] = trim($chunks[1]); |
769
|
31 |
|
} |
770
|
|
|
|
771
|
31 |
|
return $properties; |
772
|
|
|
} |
773
|
|
|
|
774
|
|
|
/** |
775
|
|
|
* Strip style tags into the generated HTML |
776
|
|
|
* |
777
|
|
|
* @param \DOMXPath $xPath The DOMXPath for the entire document. |
778
|
|
|
* |
779
|
|
|
* @return string |
780
|
|
|
*/ |
781
|
13 |
|
private function stripOriginalStyleTags(\DOMXPath $xPath) |
782
|
|
|
{ |
783
|
|
|
// get all style tags |
784
|
13 |
|
$nodes = $xPath->query('descendant-or-self::style'); |
785
|
13 |
|
foreach ($nodes as $node) { |
786
|
12 |
|
if ($this->excludeMediaQueries === true) { |
787
|
|
|
|
788
|
|
|
// remove comments previously to matching media queries |
789
|
11 |
|
$node->nodeValue = preg_replace(self::$styleCommentRegEx, '', $node->nodeValue); |
790
|
|
|
|
791
|
|
|
// search for Media Queries |
792
|
11 |
|
preg_match_all(self::$cssMediaQueriesRegEx, $node->nodeValue, $mqs); |
793
|
|
|
|
794
|
|
|
// replace the nodeValue with just the Media Queries |
795
|
11 |
|
$node->nodeValue = implode("\n", $mqs[0]); |
796
|
|
|
|
797
|
11 |
|
} else { |
798
|
|
|
// remove the entire style tag |
799
|
1 |
|
$node->parentNode->removeChild($node); |
800
|
|
|
} |
801
|
13 |
|
} |
802
|
13 |
|
} |
803
|
|
|
|
804
|
|
|
/** |
805
|
|
|
* Remove id and class attributes. |
806
|
|
|
* |
807
|
|
|
* @param \DOMXPath $xPath The DOMXPath for the entire document. |
808
|
|
|
* |
809
|
|
|
* @return string |
810
|
|
|
*/ |
811
|
3 |
|
private function cleanupHTML(\DOMXPath $xPath) |
812
|
|
|
{ |
813
|
3 |
|
$nodes = $xPath->query('//@class | //@id'); |
814
|
3 |
|
foreach ($nodes as $node) { |
815
|
3 |
|
$node->ownerElement->removeAttributeNode($node); |
816
|
3 |
|
} |
817
|
3 |
|
} |
818
|
|
|
|
819
|
|
|
/** |
820
|
|
|
* Should the IDs and classes be removed? |
821
|
|
|
* |
822
|
|
|
* @param bool $on Should we enable cleanup? |
823
|
|
|
*/ |
824
|
3 |
|
public function setCleanup($on = true) |
825
|
|
|
{ |
826
|
3 |
|
$this->cleanup = (bool)$on; |
827
|
3 |
|
} |
828
|
|
|
|
829
|
|
|
/** |
830
|
|
|
* Set the encoding to use with the DOMDocument |
831
|
|
|
* |
832
|
|
|
* @param string $encoding The encoding to use. |
833
|
|
|
* |
834
|
|
|
* @deprecated Doesn't have any effect |
835
|
|
|
*/ |
836
|
|
|
public function setEncoding($encoding) |
837
|
|
|
{ |
838
|
|
|
$this->encoding = (string)$encoding; |
839
|
|
|
} |
840
|
|
|
|
841
|
|
|
/** |
842
|
|
|
* Set use of inline styles block |
843
|
|
|
* If this is enabled the class will use the style-block in the HTML. |
844
|
|
|
* |
845
|
|
|
* @param bool $on Should we process inline styles? |
846
|
|
|
*/ |
847
|
26 |
|
public function setUseInlineStylesBlock($on = true) |
848
|
|
|
{ |
849
|
26 |
|
$this->useInlineStylesBlock = (bool)$on; |
850
|
26 |
|
} |
851
|
|
|
|
852
|
|
|
/** |
853
|
|
|
* Set use of inline link block |
854
|
|
|
* If this is enabled the class will use the links reference in the HTML. |
855
|
|
|
* |
856
|
|
|
* @return void |
857
|
|
|
* |
858
|
|
|
* @param bool [optional] $on Should we process link styles? |
859
|
|
|
*/ |
860
|
2 |
|
public function setLoadCSSFromHTML($on = true) |
861
|
|
|
{ |
862
|
2 |
|
$this->loadCSSFromHTML = (bool)$on; |
863
|
2 |
|
} |
864
|
|
|
|
865
|
|
|
/** |
866
|
|
|
* Set strip original style tags |
867
|
|
|
* If this is enabled the class will remove all style tags in the HTML. |
868
|
|
|
* |
869
|
|
|
* @param bool $on Should we process inline styles? |
870
|
|
|
*/ |
871
|
17 |
|
public function setStripOriginalStyleTags($on = true) |
872
|
|
|
{ |
873
|
17 |
|
$this->stripOriginalStyleTags = (bool)$on; |
874
|
17 |
|
} |
875
|
|
|
|
876
|
|
|
/** |
877
|
|
|
* Set exclude media queries |
878
|
|
|
* |
879
|
|
|
* If this is enabled the media queries will be removed before inlining the rules. |
880
|
|
|
* |
881
|
|
|
* WARNING: If you use inline styles block "<style>" the this option will keep the media queries. |
882
|
|
|
* |
883
|
|
|
* @param bool $on |
884
|
|
|
*/ |
885
|
14 |
|
public function setExcludeMediaQueries($on = true) |
886
|
|
|
{ |
887
|
14 |
|
$this->excludeMediaQueries = (bool)$on; |
888
|
14 |
|
} |
889
|
|
|
|
890
|
|
|
/** |
891
|
|
|
* Set exclude charset |
892
|
|
|
* |
893
|
|
|
* @param bool $on |
894
|
|
|
*/ |
895
|
1 |
|
public function setExcludeCssCharset($on = true) |
896
|
|
|
{ |
897
|
1 |
|
$this->excludeCssCharset = (bool)$on; |
898
|
1 |
|
} |
899
|
|
|
|
900
|
|
|
/** |
901
|
|
|
* Set exclude conditional inline-style blocks e.g.: <!--[if gte mso 9]><style>.foo { bar } </style><![endif]--> |
902
|
|
|
* |
903
|
|
|
* @param bool $on |
904
|
|
|
*/ |
905
|
6 |
|
public function setExcludeConditionalInlineStylesBlock($on = true) |
906
|
|
|
{ |
907
|
6 |
|
$this->excludeConditionalInlineStylesBlock = (bool)$on; |
908
|
6 |
|
} |
909
|
|
|
|
910
|
|
|
/** |
911
|
|
|
* @param string $html |
912
|
|
|
* @return string |
913
|
|
|
*/ |
914
|
44 |
|
private function replaceAmperstampToPreserveHtmlEntities($html) |
915
|
|
|
{ |
916
|
44 |
|
return str_replace(array('&',), array('!!!!AMP!!!!'), $html); |
917
|
|
|
} |
918
|
|
|
|
919
|
|
|
/** |
920
|
|
|
* @param string $html |
921
|
|
|
* @return string |
922
|
|
|
*/ |
923
|
44 |
|
private function putReplacedAmperstampBackToPreserveHtmlEntities($html) |
924
|
|
|
{ |
925
|
44 |
|
return str_replace(array('!!!!AMP!!!!', ' '), array('&', ''), $html); |
926
|
|
|
} |
927
|
|
|
} |
928
|
|
|
|