Laravel version update
Laravel version update
This commit is contained in:
Manish Verma
@@ -1,677 +1,235 @@
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<?php
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namespace TijsVerkoyen\CssToInlineStyles;
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/**
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* CSS to Inline Styles class
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*
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* @author Tijs Verkoyen <php-css-to-inline-styles@verkoyen.eu>
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* @version 1.5.5
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* @copyright Copyright (c), Tijs Verkoyen. All rights reserved.
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* @license Revised BSD License
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*/
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use Symfony\Component\CssSelector\CssSelector;
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use Symfony\Component\CssSelector\CssSelectorConverter;
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use Symfony\Component\CssSelector\Exception\ExceptionInterface;
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use TijsVerkoyen\CssToInlineStyles\Css\Processor;
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use TijsVerkoyen\CssToInlineStyles\Css\Property\Processor as PropertyProcessor;
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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 CssToInlineStyles
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{
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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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private $cssConverter;
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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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* 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 the media queries from the inlined styles
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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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* 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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* @return void
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* @param string [optional] $html The HTML to process.
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* @param string [optional] $css The CSS to use.
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*/
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public function __construct($html = null, $css = null)
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public function __construct()
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{
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if ($html !== null) {
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$this->setHTML($html);
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if (class_exists('Symfony\Component\CssSelector\CssSelectorConverter')) {
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$this->cssConverter = new CssSelectorConverter();
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}
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}
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/**
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* Will inline the $css into the given $html
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*
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* Remark: if the html contains <style>-tags those will be used, the rules
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* in $css will be appended.
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*
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* @param string $html
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* @param string $css
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* @return string
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*/
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public function convert($html, $css = null)
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{
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$document = $this->createDomDocumentFromHtml($html);
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$processor = new Processor();
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// get all styles from the style-tags
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$rules = $processor->getRules(
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$processor->getCssFromStyleTags($html)
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);
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if ($css !== null) {
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$this->setCSS($css);
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$rules = $processor->getRules($css, $rules);
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}
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$document = $this->inline($document, $rules);
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return $this->getHtmlFromDocument($document);
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}
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/**
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* Remove id and class attributes.
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* Inline the given properties on an given DOMElement
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*
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* @return string
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* @param \DOMXPath $xPath The DOMXPath for the entire document.
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* @param \DOMElement $element
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* @param Css\Property\Property[] $properties
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* @return \DOMElement
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*/
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private function cleanupHTML(\DOMXPath $xPath)
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public function inlineCssOnElement(\DOMElement $element, array $properties)
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{
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$nodes = $xPath->query('//@class | //@id');
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foreach ($nodes as $node) {
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$node->ownerElement->removeAttributeNode($node);
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}
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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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* @return string
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* @param bool [optional] $outputXHTML Should we output valid XHTML?
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*/
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public function convert($outputXHTML = 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 == null) {
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throw new Exception('No HTML provided.');
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if (empty($properties)) {
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return $element;
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}
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// should we use inline style-block
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if ($this->useInlineStylesBlock) {
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// init var
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$matches = array();
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$cssProperties = array();
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$inlineProperties = array();
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// match the style blocks
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preg_match_all('|<style(.*)>(.*)</style>|isU', $this->html, $matches);
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foreach ($this->getInlineStyles($element) as $property) {
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$inlineProperties[$property->getName()] = $property;
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}
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// any style-blocks found?
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if (!empty($matches[2])) {
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// add
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foreach ($matches[2] as $match) {
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$this->css .= trim($match) . "\n";
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}
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foreach ($properties as $property) {
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if (!isset($inlineProperties[$property->getName()])) {
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$cssProperties[$property->getName()] = $property;
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}
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}
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// process css
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$cssRules = $this->processCSS();
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$rules = array();
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foreach (array_merge($cssProperties, $inlineProperties) as $property) {
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$rules[] = $property->toString();
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}
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$element->setAttribute('style', implode(' ', $rules));
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// create new DOMDocument
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$document = new \DOMDocument('1.0', $this->getEncoding());
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return $element;
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}
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// set error level
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/**
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* Get the current inline styles for a given DOMElement
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*
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* @param \DOMElement $element
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* @return Css\Property\Property[]
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*/
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public function getInlineStyles(\DOMElement $element)
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{
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$processor = new PropertyProcessor();
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return $processor->convertArrayToObjects(
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$processor->splitIntoSeparateProperties(
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$element->getAttribute('style')
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)
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);
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}
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/**
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* @param string $html
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* @return \DOMDocument
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*/
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protected function createDomDocumentFromHtml($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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// load HTML
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$document->loadHTML($this->html);
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// Restore error level
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$document->loadHTML(mb_convert_encoding($html, 'HTML-ENTITIES', 'UTF-8'));
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libxml_use_internal_errors($internalErrors);
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$document->formatOutput = true;
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return $document;
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}
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/**
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* @param \DOMDocument $document
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* @return string
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*/
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protected function getHtmlFromDocument(\DOMDocument $document)
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{
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// retrieve the document element
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// we do it this way to preserve the utf-8 encoding
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$htmlElement = $document->documentElement;
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$html = $document->saveHTML($htmlElement);
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$html = trim($html);
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// retrieve the doctype
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$document->removeChild($htmlElement);
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$doctype = $document->saveHTML();
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$doctype = trim($doctype);
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// if it is the html5 doctype convert it to lowercase
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if ($doctype === '<!DOCTYPE html>') {
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$doctype = strtolower($doctype);
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}
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return $doctype."\n".$html;
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}
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/**
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* @param \DOMDocument $document
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* @param Css\Rule\Rule[] $rules
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* @return \DOMDocument
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*/
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protected function inline(\DOMDocument $document, array $rules)
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{
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if (empty($rules)) {
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return $document;
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}
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$propertyStorage = new \SplObjectStorage();
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// create new XPath
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$xPath = new \DOMXPath($document);
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// any rules?
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if (!empty($cssRules)) {
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// loop rules
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foreach ($cssRules as $rule) {
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usort($rules, array(RuleProcessor::class, 'sortOnSpecificity'));
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$selector = new Selector($rule['selector']);
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$query = $selector->toXPath();
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if (is_null($query)) {
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continue;
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}
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// search elements
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$elements = $xPath->query($query);
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// validate elements
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if ($elements === false) {
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continue;
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}
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// loop found elements
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foreach ($elements as $element) {
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// no styles stored?
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if ($element->attributes->getNamedItem(
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'data-css-to-inline-styles-original-styles'
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) == null
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) {
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// init var
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$originalStyle = '';
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if ($element->attributes->getNamedItem('style') !== null) {
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$originalStyle = $element->attributes->getNamedItem('style')->value;
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}
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// store original styles
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$element->setAttribute(
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'data-css-to-inline-styles-original-styles',
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$originalStyle
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);
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// clear the styles
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$element->setAttribute('style', '');
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}
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// init var
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$properties = array();
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// get current styles
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$stylesAttribute = $element->attributes->getNamedItem('style');
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// any styles defined before?
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if ($stylesAttribute !== null) {
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// get value for the styles attribute
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$definedStyles = (string) $stylesAttribute->value;
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// split into properties
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$definedProperties = $this->splitIntoProperties($definedStyles);
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// loop properties
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foreach ($definedProperties as $property) {
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// validate property
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if ($property == '') {
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continue;
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}
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// split into chunks
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$chunks = (array) explode(':', trim($property), 2);
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// validate
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if (!isset($chunks[1])) {
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continue;
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}
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// loop chunks
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$properties[$chunks[0]] = trim($chunks[1]);
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}
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}
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// add new properties into the list
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foreach ($rule['properties'] as $key => $value) {
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// If one of the rules is already set and is !important, don't apply it,
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// except if the new rule is also important.
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if (
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!isset($properties[$key])
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|| stristr($properties[$key], '!important') === false
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|| (stristr(implode('', $value), '!important') !== false)
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) {
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$properties[$key] = $value;
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}
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}
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// build string
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$propertyChunks = array();
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// build chunks
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foreach ($properties as $key => $values) {
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foreach ((array) $values as $value) {
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$propertyChunks[] = $key . ': ' . $value . ';';
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}
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}
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// build properties string
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$propertiesString = implode(' ', $propertyChunks);
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// set attribute
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if ($propertiesString != '') {
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$element->setAttribute('style', $propertiesString);
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}
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}
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}
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// reapply original styles
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// search elements
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$elements = $xPath->query('//*[@data-css-to-inline-styles-original-styles]');
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// loop found elements
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foreach ($elements as $element) {
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// get the original styles
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$originalStyle = $element->attributes->getNamedItem(
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'data-css-to-inline-styles-original-styles'
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)->value;
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if ($originalStyle != '') {
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$originalProperties = array();
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$originalStyles = $this->splitIntoProperties($originalStyle);
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foreach ($originalStyles as $property) {
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// validate property
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if ($property == '') {
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continue;
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}
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// split into chunks
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$chunks = (array) explode(':', trim($property), 2);
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// validate
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if (!isset($chunks[1])) {
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continue;
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}
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// loop chunks
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$originalProperties[$chunks[0]] = trim($chunks[1]);
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}
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// get current styles
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$stylesAttribute = $element->attributes->getNamedItem('style');
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$properties = array();
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// any styles defined before?
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if ($stylesAttribute !== null) {
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// get value for the styles attribute
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$definedStyles = (string) $stylesAttribute->value;
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// split into properties
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$definedProperties = $this->splitIntoProperties($definedStyles);
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// loop properties
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foreach ($definedProperties as $property) {
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// validate property
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if ($property == '') {
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continue;
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}
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// split into chunks
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$chunks = (array) explode(':', trim($property), 2);
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// validate
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if (!isset($chunks[1])) {
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continue;
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}
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// loop chunks
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$properties[$chunks[0]] = trim($chunks[1]);
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}
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}
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// add new properties into the list
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foreach ($originalProperties as $key => $value) {
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$properties[$key] = $value;
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}
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// build string
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$propertyChunks = array();
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// build chunks
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foreach ($properties as $key => $values) {
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foreach ((array) $values as $value) {
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$propertyChunks[] = $key . ': ' . $value . ';';
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}
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}
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// build properties string
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$propertiesString = implode(' ', $propertyChunks);
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// set attribute
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if ($propertiesString != '') {
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$element->setAttribute(
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'style',
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$propertiesString
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);
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}
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}
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// remove placeholder
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$element->removeAttribute(
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'data-css-to-inline-styles-original-styles'
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);
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}
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}
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// strip original style tags if we need to
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if ($this->stripOriginalStyleTags) {
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$this->stripOriginalStyleTags($xPath);
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}
|
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|
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// cleanup the HTML if we need to
|
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if ($this->cleanup) {
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$this->cleanupHTML($xPath);
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}
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|
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// should we output XHTML?
|
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if ($outputXHTML) {
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// set formating
|
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$document->formatOutput = true;
|
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|
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// get the HTML as XML
|
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$html = $document->saveXML(null, LIBXML_NOEMPTYTAG);
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|
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// remove the XML-header
|
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$html = ltrim(preg_replace('/<\?xml (.*)\?>/', '', $html));
|
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} // just regular HTML 4.01 as it should be used in newsletters
|
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else {
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// get the HTML
|
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$html = $document->saveHTML();
|
||||
}
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|
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// return
|
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return $html;
|
||||
}
|
||||
|
||||
/**
|
||||
* Split a style string into an array of properties.
|
||||
* The returned array can contain empty strings.
|
||||
*
|
||||
* @param string $styles ex: 'color:blue;font-size:12px;'
|
||||
* @return array an array of strings containing css property ex: array('color:blue','font-size:12px')
|
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*/
|
||||
private function splitIntoProperties($styles) {
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$properties = (array) explode(';', $styles);
|
||||
|
||||
for ($i = 0; $i < count($properties); $i++) {
|
||||
// If next property begins with base64,
|
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// Then the ';' was part of this property (and we should not have split on it).
|
||||
if (isset($properties[$i + 1]) && strpos($properties[$i + 1], 'base64,') === 0) {
|
||||
$properties[$i] .= ';' . $properties[$i + 1];
|
||||
$properties[$i + 1] = '';
|
||||
$i += 1;
|
||||
}
|
||||
}
|
||||
return $properties;
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the encoding to use
|
||||
*
|
||||
* @return string
|
||||
*/
|
||||
private function getEncoding()
|
||||
{
|
||||
return $this->encoding;
|
||||
}
|
||||
|
||||
/**
|
||||
* Process the loaded CSS
|
||||
*
|
||||
* @return array
|
||||
*/
|
||||
private function processCSS()
|
||||
{
|
||||
// init vars
|
||||
$css = (string) $this->css;
|
||||
$cssRules = array();
|
||||
|
||||
// remove newlines
|
||||
$css = str_replace(array("\r", "\n"), '', $css);
|
||||
|
||||
// replace double quotes by single quotes
|
||||
$css = str_replace('"', '\'', $css);
|
||||
|
||||
// remove comments
|
||||
$css = preg_replace('|/\*.*?\*/|', '', $css);
|
||||
|
||||
// remove spaces
|
||||
$css = preg_replace('/\s\s+/', ' ', $css);
|
||||
|
||||
if ($this->excludeMediaQueries) {
|
||||
$css = preg_replace('/@media [^{]*{([^{}]|{[^{}]*})*}/', '', $css);
|
||||
}
|
||||
|
||||
// rules are splitted by }
|
||||
$rules = (array) explode('}', $css);
|
||||
|
||||
// init var
|
||||
$i = 1;
|
||||
|
||||
// loop rules
|
||||
foreach ($rules as $rule) {
|
||||
// split into chunks
|
||||
$chunks = explode('{', $rule);
|
||||
|
||||
// invalid rule?
|
||||
if (!isset($chunks[1])) {
|
||||
try {
|
||||
if (null !== $this->cssConverter) {
|
||||
$expression = $this->cssConverter->toXPath($rule->getSelector());
|
||||
} else {
|
||||
// Compatibility layer for Symfony 2.7 and older
|
||||
$expression = CssSelector::toXPath($rule->getSelector());
|
||||
}
|
||||
} catch (ExceptionInterface $e) {
|
||||
continue;
|
||||
}
|
||||
|
||||
// set the selectors
|
||||
$selectors = trim($chunks[0]);
|
||||
$elements = $xPath->query($expression);
|
||||
|
||||
// get cssProperties
|
||||
$cssProperties = trim($chunks[1]);
|
||||
if ($elements === false) {
|
||||
continue;
|
||||
}
|
||||
|
||||
// split multiple selectors
|
||||
$selectors = (array) explode(',', $selectors);
|
||||
|
||||
// loop selectors
|
||||
foreach ($selectors as $selector) {
|
||||
// cleanup
|
||||
$selector = trim($selector);
|
||||
|
||||
// build an array for each selector
|
||||
$ruleSet = array();
|
||||
|
||||
// store selector
|
||||
$ruleSet['selector'] = $selector;
|
||||
|
||||
// process the properties
|
||||
$ruleSet['properties'] = $this->processCSSProperties(
|
||||
$cssProperties
|
||||
foreach ($elements as $element) {
|
||||
$propertyStorage[$element] = $this->calculatePropertiesToBeApplied(
|
||||
$rule->getProperties(),
|
||||
$propertyStorage->contains($element) ? $propertyStorage[$element] : array()
|
||||
);
|
||||
|
||||
// calculate specificity
|
||||
$ruleSet['specificity'] = Specificity::fromSelector($selector);
|
||||
|
||||
// remember the order in which the rules appear
|
||||
$ruleSet['order'] = $i;
|
||||
|
||||
// add into global rules
|
||||
$cssRules[] = $ruleSet;
|
||||
}
|
||||
|
||||
// increment
|
||||
$i++;
|
||||
}
|
||||
|
||||
// sort based on specificity
|
||||
if (!empty($cssRules)) {
|
||||
usort($cssRules, array(__CLASS__, 'sortOnSpecificity'));
|
||||
foreach ($propertyStorage as $element) {
|
||||
$this->inlineCssOnElement($element, $propertyStorage[$element]);
|
||||
}
|
||||
|
||||
return $cssRules;
|
||||
return $document;
|
||||
}
|
||||
|
||||
/**
|
||||
* Process the CSS-properties
|
||||
* Merge the CSS rules to determine the applied properties.
|
||||
*
|
||||
* @return array
|
||||
* @param string $propertyString The CSS-properties.
|
||||
* @param Css\Property\Property[] $properties
|
||||
* @param Css\Property\Property[] $cssProperties existing applied properties indexed by name
|
||||
*
|
||||
* @return Css\Property\Property[] updated properties, indexed by name
|
||||
*/
|
||||
private function processCSSProperties($propertyString)
|
||||
private function calculatePropertiesToBeApplied(array $properties, array $cssProperties)
|
||||
{
|
||||
// split into chunks
|
||||
$properties = $this->splitIntoProperties($propertyString);
|
||||
if (empty($properties)) {
|
||||
return $cssProperties;
|
||||
}
|
||||
|
||||
// init var
|
||||
$pairs = array();
|
||||
|
||||
// loop properties
|
||||
foreach ($properties as $property) {
|
||||
// split into chunks
|
||||
$chunks = (array) explode(':', $property, 2);
|
||||
if (isset($cssProperties[$property->getName()])) {
|
||||
$existingProperty = $cssProperties[$property->getName()];
|
||||
|
||||
// validate
|
||||
if (!isset($chunks[1])) {
|
||||
continue;
|
||||
}
|
||||
//skip check to overrule if existing property is important and current is not
|
||||
if ($existingProperty->isImportant() && !$property->isImportant()) {
|
||||
continue;
|
||||
}
|
||||
|
||||
// cleanup
|
||||
$chunks[0] = trim($chunks[0]);
|
||||
$chunks[1] = trim($chunks[1]);
|
||||
//overrule if current property is important and existing is not, else check specificity
|
||||
$overrule = !$existingProperty->isImportant() && $property->isImportant();
|
||||
if (!$overrule) {
|
||||
$overrule = $existingProperty->getOriginalSpecificity()->compareTo($property->getOriginalSpecificity()) <= 0;
|
||||
}
|
||||
|
||||
// add to pairs array
|
||||
if (!isset($pairs[$chunks[0]]) ||
|
||||
!in_array($chunks[1], $pairs[$chunks[0]])
|
||||
) {
|
||||
$pairs[$chunks[0]][] = $chunks[1];
|
||||
}
|
||||
}
|
||||
|
||||
// sort the pairs
|
||||
ksort($pairs);
|
||||
|
||||
// return
|
||||
return $pairs;
|
||||
}
|
||||
|
||||
/**
|
||||
* Should the IDs and classes be removed?
|
||||
*
|
||||
* @return void
|
||||
* @param bool [optional] $on Should we enable cleanup?
|
||||
*/
|
||||
public function setCleanup($on = true)
|
||||
{
|
||||
$this->cleanup = (bool) $on;
|
||||
}
|
||||
|
||||
/**
|
||||
* Set CSS to use
|
||||
*
|
||||
* @return void
|
||||
* @param string $css The CSS to use.
|
||||
*/
|
||||
public function setCSS($css)
|
||||
{
|
||||
$this->css = (string) $css;
|
||||
}
|
||||
|
||||
/**
|
||||
* Set the encoding to use with the DOMDocument
|
||||
*
|
||||
* @return void
|
||||
* @param string $encoding The encoding to use.
|
||||
*
|
||||
* @deprecated Doesn't have any effect
|
||||
*/
|
||||
public function setEncoding($encoding)
|
||||
{
|
||||
$this->encoding = (string) $encoding;
|
||||
}
|
||||
|
||||
/**
|
||||
* Set HTML to process
|
||||
*
|
||||
* @return void
|
||||
* @param string $html The HTML to process.
|
||||
*/
|
||||
public function setHTML($html)
|
||||
{
|
||||
$this->html = (string) $html;
|
||||
}
|
||||
|
||||
/**
|
||||
* Set use of inline styles block
|
||||
* If this is enabled the class will use the style-block in the HTML.
|
||||
*
|
||||
* @return void
|
||||
* @param bool [optional] $on Should we process inline styles?
|
||||
*/
|
||||
public function setUseInlineStylesBlock($on = true)
|
||||
{
|
||||
$this->useInlineStylesBlock = (bool) $on;
|
||||
}
|
||||
|
||||
/**
|
||||
* Set strip original style tags
|
||||
* If this is enabled the class will remove all style tags in the HTML.
|
||||
*
|
||||
* @return void
|
||||
* @param bool [optional] $on Should we process inline styles?
|
||||
*/
|
||||
public function setStripOriginalStyleTags($on = true)
|
||||
{
|
||||
$this->stripOriginalStyleTags = (bool) $on;
|
||||
}
|
||||
|
||||
/**
|
||||
* Set exclude media queries
|
||||
*
|
||||
* If this is enabled the media queries will be removed before inlining the rules
|
||||
*
|
||||
* @return void
|
||||
* @param bool [optional] $on
|
||||
*/
|
||||
public function setExcludeMediaQueries($on = true)
|
||||
{
|
||||
$this->excludeMediaQueries = (bool) $on;
|
||||
}
|
||||
|
||||
/**
|
||||
* Strip style tags into the generated HTML
|
||||
*
|
||||
* @return string
|
||||
* @param \DOMXPath $xPath The DOMXPath for the entire document.
|
||||
*/
|
||||
private function stripOriginalStyleTags(\DOMXPath $xPath)
|
||||
{
|
||||
// Get all style tags
|
||||
$nodes = $xPath->query('descendant-or-self::style');
|
||||
|
||||
foreach ($nodes as $node) {
|
||||
if ($this->excludeMediaQueries) {
|
||||
//Search for Media Queries
|
||||
preg_match_all('/@media [^{]*{([^{}]|{[^{}]*})*}/', $node->nodeValue, $mqs);
|
||||
|
||||
// Replace the nodeValue with just the Media Queries
|
||||
$node->nodeValue = implode("\n", $mqs[0]);
|
||||
if ($overrule) {
|
||||
unset($cssProperties[$property->getName()]);
|
||||
$cssProperties[$property->getName()] = $property;
|
||||
}
|
||||
} else {
|
||||
// Remove the entire style tag
|
||||
$node->parentNode->removeChild($node);
|
||||
$cssProperties[$property->getName()] = $property;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Sort an array on the specificity element
|
||||
*
|
||||
* @return int
|
||||
* @param array $e1 The first element.
|
||||
* @param array $e2 The second element.
|
||||
*/
|
||||
private static function sortOnSpecificity($e1, $e2)
|
||||
{
|
||||
// Compare the specificity
|
||||
$value = $e1['specificity']->compareTo($e2['specificity']);
|
||||
|
||||
// if the specificity is the same, use the order in which the element appeared
|
||||
if ($value === 0) {
|
||||
$value = $e1['order'] - $e2['order'];
|
||||
}
|
||||
|
||||
return $value;
|
||||
return $cssProperties;
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user