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Make emogrifier works with PHP 5.2, closes #7179

This commit is contained in:
Claudio Sanches 2015-01-23 10:41:15 -02:00
parent 586025b17e
commit ea908283a3
1 changed files with 33 additions and 41 deletions
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74
includes/libraries/class-emogrifier.php
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@ -113,6 +113,8 @@ class Emogrifier {
*/ */
public $preserveEncoding = FALSE; public $preserveEncoding = FALSE;
public static $_media = '';
/** /**
* The constructor. * The constructor.
* *
@ -172,12 +174,12 @@ class Emogrifier {
* *
* @return void * @return void
* *
* @throws \InvalidArgumentException * @throws InvalidArgumentException
*/ */
private function clearCache($key) { private function clearCache($key) {
$allowedCacheKeys = array(self::CACHE_KEY_CSS, self::CACHE_KEY_SELECTOR, self::CACHE_KEY_XPATH, self::CACHE_KEY_CSS_DECLARATION_BLOCK); $allowedCacheKeys = array(self::CACHE_KEY_CSS, self::CACHE_KEY_SELECTOR, self::CACHE_KEY_XPATH, self::CACHE_KEY_CSS_DECLARATION_BLOCK);
if (!in_array($key, $allowedCacheKeys, TRUE)) { if (!in_array($key, $allowedCacheKeys, TRUE)) {
throw new \InvalidArgumentException('Invalid cache key: ' . $key, 1391822035); throw new InvalidArgumentException('Invalid cache key: ' . $key, 1391822035);
} }
$this->caches[$key] = array(); $this->caches[$key] = array();
@ -230,15 +232,15 @@ class Emogrifier {
* *
* @return string * @return string
* *
* @throws \BadMethodCallException * @throws BadMethodCallException
*/ */
public function emogrify() { public function emogrify() {
if ($this->html === '') { if ($this->html === '') {
throw new \BadMethodCallException('Please set some HTML first before calling emogrify.', 1390393096); throw new BadMethodCallException('Please set some HTML first before calling emogrify.', 1390393096);
} }
$xmlDocument = $this->createXmlDocument(); $xmlDocument = $this->createXmlDocument();
$xpath = new \DOMXPath($xmlDocument); $xpath = new DOMXPath($xmlDocument);
$this->clearAllCaches(); $this->clearAllCaches();
// before be begin processing the CSS file, parse the document and normalize all existing CSS attributes (changes 'DISPLAY: none' to 'display: none'); // before be begin processing the CSS file, parse the document and normalize all existing CSS attributes (changes 'DISPLAY: none' to 'display: none');
@ -248,15 +250,9 @@ class Emogrifier {
$nodesWithStyleAttributes = $xpath->query('//*[@style]'); $nodesWithStyleAttributes = $xpath->query('//*[@style]');
if ($nodesWithStyleAttributes !== FALSE) { if ($nodesWithStyleAttributes !== FALSE) {
/** @var $nodeWithStyleAttribute \DOMNode */ /** @var $nodeWithStyleAttribute DOMNode */
foreach ($nodesWithStyleAttributes as $node) { foreach ($nodesWithStyleAttributes as $node) {
$normalizedOriginalStyle = preg_replace_callback( $normalizedOriginalStyle = preg_replace_callback( '/[A-z\\-]+(?=\\:)/S', array( $this, 'strtolower' ), $node->getAttribute('style') );
'/[A-z\\-]+(?=\\:)/S',
function (array $m) {
return strtolower($m[0]);
},
$node->getAttribute('style')
);
// in order to not overwrite existing style attributes in the HTML, we have to save the original HTML styles // in order to not overwrite existing style attributes in the HTML, we have to save the original HTML styles
$nodePath = $node->getNodePath(); $nodePath = $node->getNodePath();
@ -361,6 +357,10 @@ class Emogrifier {
} }
} }
public function strtolower(array $m) {
return strtolower($m[0]);
}
/** /**
* This method merges old or existing name/value array with new name/value array * This method merges old or existing name/value array with new name/value array
@ -385,10 +385,10 @@ class Emogrifier {
* Copies the media part from CSS array parts to $xmlDocument. * Copies the media part from CSS array parts to $xmlDocument.
* *
* @param array $cssParts * @param array $cssParts
* @param \DOMDocument $xmlDocument * @param DOMDocument $xmlDocument
* @return void * @return void
*/ */
public function copyCssWithMediaToStyleNode(array $cssParts, \DOMDocument $xmlDocument) { public function copyCssWithMediaToStyleNode(array $cssParts, DOMDocument $xmlDocument) {
if (isset($cssParts['media']) && $cssParts['media'] !== '') { if (isset($cssParts['media']) && $cssParts['media'] !== '') {
$this->addStyleElementToDocument($xmlDocument, $cssParts['media']); $this->addStyleElementToDocument($xmlDocument, $cssParts['media']);
} }
@ -397,10 +397,10 @@ class Emogrifier {
/** /**
* Returns CSS content. * Returns CSS content.
* *
* @param \DOMXPath $xpath * @param DOMXPath $xpath
* @return string * @return string
*/ */
private function getCssFromAllStyleNodes(\DOMXPath $xpath) { private function getCssFromAllStyleNodes(DOMXPath $xpath) {
$styleNodes = $xpath->query('//style'); $styleNodes = $xpath->query('//style');
if ($styleNodes === FALSE) { if ($styleNodes === FALSE) {
@ -408,7 +408,7 @@ class Emogrifier {
} }
$css = ''; $css = '';
/** @var $styleNode \DOMNode */ /** @var $styleNode DOMNode */
foreach ($styleNodes as $styleNode) { foreach ($styleNodes as $styleNode) {
$css .= "\n\n" . $styleNode->nodeValue; $css .= "\n\n" . $styleNode->nodeValue;
$styleNode->parentNode->removeChild($styleNode); $styleNode->parentNode->removeChild($styleNode);
@ -420,11 +420,11 @@ class Emogrifier {
/** /**
* Adds a style element with $css to $document. * Adds a style element with $css to $document.
* *
* @param \DOMDocument $document * @param DOMDocument $document
* @param string $css * @param string $css
* @return void * @return void
*/ */
private function addStyleElementToDocument(\DOMDocument $document, $css) { private function addStyleElementToDocument(DOMDocument $document, $css) {
$styleElement = $document->createElement('style', $css); $styleElement = $document->createElement('style', $css);
$styleAttribute = $document->createAttribute('type'); $styleAttribute = $document->createAttribute('type');
$styleAttribute->value = 'text/css'; $styleAttribute->value = 'text/css';
@ -437,10 +437,10 @@ class Emogrifier {
/** /**
* Returns the existing or creates a new head element in $document. * Returns the existing or creates a new head element in $document.
* *
* @param \DOMDocument $document * @param DOMDocument $document
* @return \DOMNode the head element * @return DOMNode the head element
*/ */
private function getOrCreateHeadElement(\DOMDocument $document) { private function getOrCreateHeadElement(DOMDocument $document) {
$head = $document->getElementsByTagName('head')->item(0); $head = $document->getElementsByTagName('head')->item(0);
if ($head === NULL) { if ($head === NULL) {
@ -473,14 +473,7 @@ class Emogrifier {
* @return array * @return array
*/ */
private function splitCssAndMediaQuery($css) { private function splitCssAndMediaQuery($css) {
$media = ''; $css = preg_replace_callback( '#@media\\s+(?:only\\s)?(?:[\\s{\(]|screen|all)\\s?[^{]+{.*}\\s*}\\s*#misU', array( $this, '_media_concat' ), $css );
$css = preg_replace_callback(
'#@media\\s+(?:only\\s)?(?:[\\s{\(]|screen|all)\\s?[^{]+{.*}\\s*}\\s*#misU',
function($matches) use (&$media) {
$media .= $matches[0];
}, $css
);
// filter the CSS // filter the CSS
$search = array( $search = array(
@ -501,16 +494,20 @@ class Emogrifier {
// clean CSS before output // clean CSS before output
$css = preg_replace($search, $replace, $css); $css = preg_replace($search, $replace, $css);
return array('css' => $css, 'media' => $media); return array('css' => $css, 'media' => self::$_media);
} }
private function _media_concat( $matches ) {
self::$_media .= $matches[0];
}
/** /**
* Creates a DOMDocument instance with the current HTML. * Creates a DOMDocument instance with the current HTML.
* *
* @return \DOMDocument * @return DOMDocument
*/ */
private function createXmlDocument() { private function createXmlDocument() {
$xmlDocument = new \DOMDocument; $xmlDocument = new DOMDocument;
$xmlDocument->encoding = self::ENCODING; $xmlDocument->encoding = self::ENCODING;
$xmlDocument->strictErrorChecking = FALSE; $xmlDocument->strictErrorChecking = FALSE;
$xmlDocument->formatOutput = TRUE; $xmlDocument->formatOutput = TRUE;
@ -528,7 +525,7 @@ class Emogrifier {
* *
* @return string the unified HTML * @return string the unified HTML
* *
* @throws \BadMethodCallException * @throws BadMethodCallException
*/ */
private function getUnifiedHtml() { private function getUnifiedHtml() {
if (!empty($this->unprocessableHtmlTags)) { if (!empty($this->unprocessableHtmlTags)) {
@ -600,12 +597,7 @@ class Emogrifier {
*/ */
private function translateCssToXpath($paramCssSelector) { private function translateCssToXpath($paramCssSelector) {
$cssSelector = ' ' . $paramCssSelector . ' '; $cssSelector = ' ' . $paramCssSelector . ' ';
$cssSelector = preg_replace_callback('/\s+\w+\s+/', $cssSelector = preg_replace_callback( '/\s+\w+\s+/', array( $this, 'strtolower' ), $cssSelector );
function(array $matches) {
return strtolower($matches[0]);
},
$cssSelector
);
$cssSelector = trim($cssSelector); $cssSelector = trim($cssSelector);
$xpathKey = md5($cssSelector); $xpathKey = md5($cssSelector);
if (!isset($this->caches[self::CACHE_KEY_XPATH][$xpathKey])) { if (!isset($this->caches[self::CACHE_KEY_XPATH][$xpathKey])) {