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-rw-r--r--include/emogrifier.class.php744
1 files changed, 507 insertions, 237 deletions
diff --git a/include/emogrifier.class.php b/include/emogrifier.class.php
index 744dd45f8..829cbfbff 100644
--- a/include/emogrifier.class.php
+++ b/include/emogrifier.class.php
@@ -1,162 +1,293 @@
<?php
-/*
-UPDATES
-
- 2008-08-10 Fixed CSS comment stripping regex to add PCRE_DOTALL (changed from '/\/\*.*\*\//U' to '/\/\*.*\*\//sU')
- 2008-08-18 Added lines instructing DOMDocument to attempt to normalize HTML before processing
- 2008-10-20 Fixed bug with bad variable name... Thanks Thomas!
- 2008-03-02 Added licensing terms under the MIT License
- Only remove unprocessable HTML tags if they exist in the array
- 2009-06-03 Normalize existing CSS (style) attributes in the HTML before we process the CSS.
- Made it so that the display:none stripper doesn't require a trailing semi-colon.
- 2009-08-13 Added support for subset class values (e.g. "p.class1.class2").
- Added better protection for bad css attributes.
- Fixed support for HTML entities.
- 2009-08-17 Fixed CSS selector processing so that selectors are processed by precedence/specificity, and not just in order.
- 2009-10-29 Fixed so that selectors appearing later in the CSS will have precedence over identical selectors appearing earlier.
- 2009-11-04 Explicitly declared static functions static to get rid of E_STRICT notices.
- 2010-05-18 Fixed bug where full url filenames with protocols wouldn't get split improperly when we explode on ':'... Thanks Mark!
- Added two new attribute selectors
- 2010-06-16 Added static caching for less processing overhead in situations where multiple emogrification takes place
- 2010-07-26 Fixed bug where '0' values were getting discarded because of php's empty() function... Thanks Scott!
- 2010-09-03 Added checks to invisible node removal to ensure that we don't try to remove non-existent child nodes of parents that have already been deleted
- 2011-04-08 Fixed errors in CSS->XPath conversion for adjacent sibling selectors and id/class combinations... Thanks Bob V.!
- 2011-06-08 Fixed an error where CSS @media types weren't being parsed correctly... Thanks Will W.!
- 2011-08-03 Fixed an error where an empty selector at the beginning of the CSS would cause a parse error on the next selector... Thanks Alexei T.!
- 2011-10-13 Fully fixed a bug introduced in 2011-06-08 where selectors at the beginning of the CSS would be parsed incorrectly... Thanks Thomas A.!
- 2011-10-26 Added an option to allow you to output emogrified code without extended characters being turned into HTML entities.
- Moved static references to class attributes so they can be manipulated.
- Added the ability to clear out the (formerly) static cache when CSS is reloaded.
- 2011-12-22 Fixed a bug that was overwriting existing inline styles from the original HTML... Thanks Sagi L.!
- 2012-01-31 Fixed a bug that was introduced with the 2011-12-22 revision... Thanks Sagi L. and M. BÄ…kowski!
- Added extraction of <style> blocks within the HTML due to popular demand.
- Added several new pseudo-selectors (first-child, last-child, nth-child, and nth-of-type).
- 2012-02-07 Fixed some recent code introductions to use class constants rather than global constants.
- Fixed some recent code introductions to make it cleaner to read.
- 2012-05-01 Made removal of invisible nodes operate in a case-insensitive manner... Thanks Juha P.!
- 2013-10-10 Add preserveStyleTag option
- 2014-01-26 PHP 5.5 compatibility (/e modifier is deprecated in preg_replace)
-*/
-
-define('CACHE_CSS', 0);
-define('CACHE_SELECTOR', 1);
-define('CACHE_XPATH', 2);
+/**
+ * This class provides functions for converting CSS styles into inline style attributes in your HTML code.
+ *
+ * For more information, please see the README.md file.
+ *
+ * @author Cameron Brooks
+ * @author Jaime Prado
+ */
class Emogrifier {
-
- // for calculating nth-of-type and nth-child selectors
+ /**
+ * @var string
+ */
+ const ENCODING = 'UTF-8';
+
+ /**
+ * @var integer
+ */
+ const CACHE_KEY_CSS = 0;
+
+ /**
+ * @var integer
+ */
+ const CACHE_KEY_SELECTOR = 1;
+
+ /**
+ * @var integer
+ */
+ const CACHE_KEY_XPATH = 2;
+
+ /**
+ * for calculating nth-of-type and nth-child selectors
+ *
+ * @var integer
+ */
const INDEX = 0;
+
+ /**
+ * for calculating nth-of-type and nth-child selectors
+ *
+ * @var integer
+ */
const MULTIPLIER = 1;
+ /**
+ * @var string
+ */
+ const ID_ATTRIBUTE_MATCHER = '/(\\w+)?\\#([\\w\\-]+)/';
+
+ /**
+ * @var string
+ */
+ const CLASS_ATTRIBUTE_MATCHER = '/(\\w+|[\\*\\]])?((\\.[\\w\\-]+)+)/';
+
+ /**
+ * @var string
+ */
private $html = '';
+
+ /**
+ * @var string
+ */
private $css = '';
- private $unprocessableHTMLTags = array('wbr');
- private $caches = array();
-
- // this attribute applies to the case where you want to preserve your original text encoding.
- // by default, emogrifier translates your text into HTML entities for two reasons:
- // 1. because of client incompatibilities, it is better practice to send out HTML entities rather than unicode over email
- // 2. it translates any illegal XML characters that DOMDocument cannot work with
- // if you would like to preserve your original encoding, set this attribute to true.
- public $preserveEncoding = false;
-
- // by default, emogrifier removes <style> tags, set preserveStyleTag to true to keep them
- public $preserveStyleTag = false;
+ /**
+ * @var array<string>
+ */
+ private $unprocessableHtmlTags = array('wbr');
+
+ /**
+ * @var array<array>
+ */
+ private $caches = array(
+ self::CACHE_KEY_CSS => array(),
+ self::CACHE_KEY_SELECTOR => array(),
+ self::CACHE_KEY_XPATH => array(),
+ );
+
+ /**
+ * the visited nodes with the XPath paths as array keys
+ *
+ * @var array<\DOMNode>
+ */
+ private $visitedNodes = array();
+
+ /**
+ * the styles to apply to the nodes with the XPath paths as array keys for the outer array and the attribute names/values
+ * as key/value pairs for the inner array
+ *
+ * @var array<array><string>
+ */
+ private $styleAttributesForNodes = array();
+
+ /**
+ * This attribute applies to the case where you want to preserve your original text encoding.
+ *
+ * By default, emogrifier translates your text into HTML entities for two reasons:
+ *
+ * 1. Because of client incompatibilities, it is better practice to send out HTML entities rather than unicode over email.
+ *
+ * 2. It translates any illegal XML characters that DOMDocument cannot work with.
+ *
+ * If you would like to preserve your original encoding, set this attribute to TRUE.
+ *
+ * @var boolean
+ */
+ public $preserveEncoding = FALSE;
+
+ /**
+ * The constructor.
+ *
+ * @param string $html the HTML to emogrify, must be UTF-8-encoded
+ * @param string $css the CSS to merge, must be UTF-8-encoded
+ */
public function __construct($html = '', $css = '') {
+ $this->setHtml($html);
+ $this->setCss($css);
+ }
+
+ /**
+ * The destructor.
+ */
+ public function __destruct() {
+ $this->purgeVisitedNodes();
+ }
+
+ /**
+ * Sets the HTML to emogrify.
+ *
+ * @param string $html the HTML to emogrify, must be UTF-8-encoded
+ *
+ * @return void
+ */
+ public function setHtml($html = '') {
$this->html = $html;
- $this->css = $css;
- $this->clearCache();
}
- public function setHTML($html = '') { $this->html = $html; }
- public function setCSS($css = '') {
+ /**
+ * Sets the CSS to merge with the HTML.
+ *
+ * @param string $css the CSS to merge, must be UTF-8-encoded
+ *
+ * @return void
+ */
+ public function setCss($css = '') {
$this->css = $css;
- $this->clearCache(CACHE_CSS);
}
- public function clearCache($key = null) {
- if (!is_null($key)) {
- if (isset($this->caches[$key])) $this->caches[$key] = array();
- } else {
- $this->caches = array(
- CACHE_CSS => array(),
- CACHE_SELECTOR => array(),
- CACHE_XPATH => array(),
- );
+ /**
+ * Clears all caches.
+ *
+ * @return void
+ */
+ private function clearAllCaches() {
+ $this->clearCache(self::CACHE_KEY_CSS);
+ $this->clearCache(self::CACHE_KEY_SELECTOR);
+ $this->clearCache(self::CACHE_KEY_XPATH);
+ }
+
+ /**
+ * Clears a single cache by key.
+ *
+ * @param integer $key the cache key, must be CACHE_KEY_CSS, CACHE_KEY_SELECTOR or CACHE_KEY_XPATH
+ *
+ * @return void
+ *
+ * @throws \InvalidArgumentException
+ */
+ private function clearCache($key) {
+ $allowedCacheKeys = array(self::CACHE_KEY_CSS, self::CACHE_KEY_SELECTOR, self::CACHE_KEY_XPATH);
+ if (!in_array($key, $allowedCacheKeys, TRUE)) {
+ throw new \InvalidArgumentException('Invalid cache key: ' . $key, 1391822035);
}
+
+ $this->caches[$key] = array();
}
- // there are some HTML tags that DOMDocument cannot process, and will throw an error if it encounters them.
- // in particular, DOMDocument will complain if you try to use HTML5 tags in an XHTML document.
- // these functions allow you to add/remove them if necessary.
- // it only strips them from the code (does not remove actual nodes).
- public function addUnprocessableHTMLTag($tag) { $this->unprocessableHTMLTags[] = $tag; }
- public function removeUnprocessableHTMLTag($tag) {
- if (($key = array_search($tag,$this->unprocessableHTMLTags)) !== false)
- unset($this->unprocessableHTMLTags[$key]);
+ /**
+ * Purges the visited nodes.
+ *
+ * @return void
+ */
+ private function purgeVisitedNodes() {
+ $this->visitedNodes = array();
+ $this->styleAttributesForNodes = array();
}
- // applies the CSS you submit to the html you submit. places the css inline
- public function emogrify() {
- $body = $this->html;
+ /**
+ * Marks a tag for removal.
+ *
+ * There are some HTML tags that DOMDocument cannot process, and it will throw an error if it encounters them.
+ * In particular, DOMDocument will complain if you try to use HTML5 tags in an XHTML document.
+ *
+ * Note: The tags will not be removed if they have any content.
+ *
+ * @param string $tagName the tag name, e.g., "p"
+ *
+ * @return void
+ */
+ public function addUnprocessableHtmlTag($tagName) {
+ $this->unprocessableHtmlTags[] = $tagName;
+ }
- // remove any unprocessable HTML tags (tags that DOMDocument cannot parse; this includes wbr and many new HTML5 tags)
- if (count($this->unprocessableHTMLTags)) {
- $unprocessableHTMLTags = implode('|',$this->unprocessableHTMLTags);
- $body = preg_replace("/<\/?($unprocessableHTMLTags)[^>]*>/i",'',$body);
+ /**
+ * Drops a tag from the removal list.
+ *
+ * @param string $tagName the tag name, e.g., "p"
+ *
+ * @return void
+ */
+ public function removeUnprocessableHtmlTag($tagName) {
+ $key = array_search($tagName, $this->unprocessableHtmlTags, TRUE);
+ if ($key !== FALSE) {
+ unset($this->unprocessableHtmlTags[$key]);
}
+ }
- $encoding = mb_detect_encoding($body);
- $body = mb_convert_encoding($body, 'HTML-ENTITIES', $encoding);
-
- $xmldoc = new DOMDocument;
- $xmldoc->encoding = $encoding;
- $xmldoc->strictErrorChecking = false;
- $xmldoc->formatOutput = true;
- $xmldoc->loadHTML($body);
- $xmldoc->normalizeDocument();
+ /**
+ * Applies the CSS you submit to the HTML you submit.
+ *
+ * This method places the CSS inline.
+ *
+ * @return string
+ *
+ * @throws \BadMethodCallException
+ */
+ public function emogrify() {
+ if ($this->html === '') {
+ throw new \BadMethodCallException('Please set some HTML first before calling emogrify.', 1390393096);
+ }
- $xpath = new DOMXPath($xmldoc);
+ $xmlDocument = $this->createXmlDocument();
+ $xpath = new \DOMXPath($xmlDocument);
+ $this->clearAllCaches();
// before be begin processing the CSS file, parse the document and normalize all existing CSS attributes (changes 'DISPLAY: none' to 'display: none');
// we wouldn't have to do this if DOMXPath supported XPath 2.0.
// also store a reference of nodes with existing inline styles so we don't overwrite them
- $vistedNodes = $vistedNodeRef = array();
- $nodes = @$xpath->query('//*[@style]');
- foreach ($nodes as $node) {
- $normalizedOrigStyle = preg_replace_callback('/[A-z\-]+(?=\:)/S',create_function('$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
- $nodeKey = md5($node->getNodePath());
- if (!isset($vistedNodeRef[$nodeKey])) {
- $vistedNodeRef[$nodeKey] = $this->cssStyleDefinitionToArray($normalizedOrigStyle);
- $vistedNodes[$nodeKey] = $node;
- }
+ $this->purgeVisitedNodes();
+
+ $nodesWithStyleAttributes = $xpath->query('//*[@style]');
+ if ($nodesWithStyleAttributes !== FALSE) {
+ $callback = create_function('$m', 'return strtolower($m[0]);');
+
+ /** @var $nodeWithStyleAttribute \DOMNode */
+ foreach ($nodesWithStyleAttributes as $node) {
+ $normalizedOriginalStyle = preg_replace_callback(
+ '/[A-z\\-]+(?=\\:)/S',
+ $callback,
+ $node->getAttribute('style')
+ );
+
+ // in order to not overwrite existing style attributes in the HTML, we have to save the original HTML styles
+ $nodePath = $node->getNodePath();
+ if (!isset($this->styleAttributesForNodes[$nodePath])) {
+ $this->styleAttributesForNodes[$nodePath] = $this->parseCssDeclarationBlock($normalizedOriginalStyle);
+ $this->visitedNodes[$nodePath] = $node;
+ }
- $node->setAttribute('style', $normalizedOrigStyle);
+ $node->setAttribute('style', $normalizedOriginalStyle);
+ }
}
// grab any existing style blocks from the html and append them to the existing CSS
// (these blocks should be appended so as to have precedence over conflicting styles in the existing CSS)
$css = $this->css;
- $nodes = @$xpath->query('//style');
- foreach ($nodes as $node) {
- // append the css
- $css .= "\n\n{$node->nodeValue}";
- // remove the <style> node
- if (!$this->preserveStyleTag) {
- $node->parentNode->removeChild($node);
+ $styleNodes = $xpath->query('//style');
+ if ($styleNodes !== FALSE) {
+ /** @var $styleNode \DOMNode */
+ foreach ($styleNodes as $styleNode) {
+ // append the css
+ $css .= "\n\n" . $styleNode->nodeValue;
+ // remove the <style> node
+ $styleNode->parentNode->removeChild($styleNode);
}
}
// filter the CSS
$search = array(
- '/\/\*.*\*\//sU', // get rid of css comment code
- '/^\s*@import\s[^;]+;/misU', // strip out any import directives
- '/^\s*@media\s[^{]+{\s*}/misU', // strip any empty media enclosures
- '/^\s*@media\s+((aural|braille|embossed|handheld|print|projection|speech|tty|tv)\s*,*\s*)+{.*}\s*}/misU', // strip out all media types that are not 'screen' or 'all' (these don't apply to email)
- '/^\s*@media\s[^{]+{(.*})\s*}/misU', // get rid of remaining media type enclosures
+ // get rid of css comment code
+ '/\\/\\*.*\\*\\//sU',
+ // strip out any import directives
+ '/^\\s*@import\\s[^;]+;/misU',
+ // strip any empty media enclosures
+ '/^\\s*@media\\s[^{]+{\\s*}/misU',
+ // strip out all media rules that are not 'screen' or 'all' (these don't apply to email)
+ '/^\\s*@media\\s+((aural|braille|embossed|handheld|print|projection|speech|tty|tv)\\s*,*\\s*)+{.*}\\s*}/misU',
+ // get rid of remaining media type rules
+ '/^\\s*@media\\s[^{]+{(.*})\\s*}/misU',
);
$replace = array(
@@ -169,53 +300,58 @@ class Emogrifier {
$css = preg_replace($search, $replace, $css);
- $csskey = md5($css);
- if (!isset($this->caches[CACHE_CSS][$csskey])) {
-
+ $cssKey = md5($css);
+ if (!isset($this->caches[self::CACHE_KEY_CSS][$cssKey])) {
// process the CSS file for selectors and definitions
- preg_match_all('/(^|[^{}])\s*([^{]+){([^}]*)}/mis', $css, $matches, PREG_SET_ORDER);
+ preg_match_all('/(?:^|[^{}])\\s*([^{]+){([^}]*)}/mis', $css, $matches, PREG_SET_ORDER);
- $all_selectors = array();
+ $allSelectors = array();
foreach ($matches as $key => $selectorString) {
// if there is a blank definition, skip
- if (!strlen(trim($selectorString[3]))) continue;
+ if (!strlen(trim($selectorString[2]))) {
+ continue;
+ }
// else split by commas and duplicate attributes so we can sort by selector precedence
- $selectors = explode(',',$selectorString[2]);
+ $selectors = explode(',', $selectorString[1]);
foreach ($selectors as $selector) {
-
// don't process pseudo-elements and behavioral (dynamic) pseudo-classes; ONLY allow structural pseudo-classes
- if (strpos($selector, ':') !== false && !preg_match('/:\S+\-(child|type)\(/i', $selector)) continue;
-
- $all_selectors[] = array('selector' => trim($selector),
- 'attributes' => trim($selectorString[3]),
- 'line' => $key, // keep track of where it appears in the file, since order is important
+ if (strpos($selector, ':') !== FALSE && !preg_match('/:\\S+\\-(child|type)\\(/i', $selector)) {
+ continue;
+ }
+
+ $allSelectors[] = array('selector' => trim($selector),
+ 'attributes' => trim($selectorString[2]),
+ // keep track of where it appears in the file, since order is important
+ 'line' => $key,
);
}
}
// now sort the selectors by precedence
- usort($all_selectors, array($this,'sortBySelectorPrecedence'));
+ usort($allSelectors, array($this,'sortBySelectorPrecedence'));
- $this->caches[CACHE_CSS][$csskey] = $all_selectors;
+ $this->caches[self::CACHE_KEY_CSS][$cssKey] = $allSelectors;
}
- foreach ($this->caches[CACHE_CSS][$csskey] as $value) {
-
+ foreach ($this->caches[self::CACHE_KEY_CSS][$cssKey] as $value) {
// query the body for the xpath selector
- $nodes = $xpath->query($this->translateCSStoXpath(trim($value['selector'])));
+ $nodesMatchingCssSelectors = $xpath->query($this->translateCssToXpath(trim($value['selector'])));
- foreach($nodes as $node) {
+ /** @var $node \DOMNode */
+ foreach ($nodesMatchingCssSelectors as $node) {
// if it has a style attribute, get it, process it, and append (overwrite) new stuff
if ($node->hasAttribute('style')) {
// break it up into an associative array
- $oldStyleArr = $this->cssStyleDefinitionToArray($node->getAttribute('style'));
- $newStyleArr = $this->cssStyleDefinitionToArray($value['attributes']);
+ $oldStyleDeclarations = $this->parseCssDeclarationBlock($node->getAttribute('style'));
+ $newStyleDeclarations = $this->parseCssDeclarationBlock($value['attributes']);
// new styles overwrite the old styles (not technically accurate, but close enough)
- $combinedArr = array_merge($oldStyleArr,$newStyleArr);
+ $combinedArray = array_merge($oldStyleDeclarations, $newStyleDeclarations);
$style = '';
- foreach ($combinedArr as $k => $v) $style .= (strtolower($k) . ':' . $v . ';');
+ foreach ($combinedArray as $attributeName => $attributeValue) {
+ $style .= (strtolower($attributeName) . ':' . $attributeValue . ';');
+ }
} else {
// otherwise create a new style
$style = trim($value['attributes']);
@@ -225,13 +361,15 @@ class Emogrifier {
}
// now iterate through the nodes that contained inline styles in the original HTML
- foreach ($vistedNodeRef as $nodeKey => $origStyleArr) {
- $node = $vistedNodes[$nodeKey];
- $currStyleArr = $this->cssStyleDefinitionToArray($node->getAttribute('style'));
+ foreach ($this->styleAttributesForNodes as $nodePath => $styleAttributesForNode) {
+ $node = $this->visitedNodes[$nodePath];
+ $currentStyleAttributes = $this->parseCssDeclarationBlock($node->getAttribute('style'));
- $combinedArr = array_merge($currStyleArr, $origStyleArr);
+ $combinedArray = array_merge($currentStyleAttributes, $styleAttributesForNode);
$style = '';
- foreach ($combinedArr as $k => $v) $style .= (strtolower($k) . ':' . $v . ';');
+ foreach ($combinedArray as $attributeName => $attributeValue) {
+ $style .= (strtolower($attributeName) . ':' . $attributeValue . ';');
+ }
$node->setAttribute('style', $style);
}
@@ -240,173 +378,305 @@ class Emogrifier {
// We need to look for display:none, but we need to do a case-insensitive search. Since DOMDocument only supports XPath 1.0,
// lower-case() isn't available to us. We've thus far only set attributes to lowercase, not attribute values. Consequently, we need
// to translate() the letters that would be in 'NONE' ("NOE") to lowercase.
- $nodes = $xpath->query('//*[contains(translate(translate(@style," ",""),"NOE","noe"),"display:none")]');
+ $nodesWithStyleDisplayNone = $xpath->query('//*[contains(translate(translate(@style," ",""),"NOE","noe"),"display:none")]');
// The checks on parentNode and is_callable below ensure that if we've deleted the parent node,
// we don't try to call removeChild on a nonexistent child node
- if ($nodes->length > 0)
- foreach ($nodes as $node)
- if ($node->parentNode && is_callable(array($node->parentNode,'removeChild')))
- $node->parentNode->removeChild($node);
+ if ($nodesWithStyleDisplayNone->length > 0) {
+ /** @var $node \DOMNode */
+ foreach ($nodesWithStyleDisplayNone as $node) {
+ if ($node->parentNode && is_callable(array($node->parentNode,'removeChild'))) {
+ $node->parentNode->removeChild($node);
+ }
+ }
+ }
if ($this->preserveEncoding) {
- return mb_convert_encoding($xmldoc->saveHTML(), $encoding, 'HTML-ENTITIES');
+ return mb_convert_encoding($xmlDocument->saveHTML(), self::ENCODING, 'HTML-ENTITIES');
} else {
- return $xmldoc->saveHTML();
+ return $xmlDocument->saveHTML();
}
}
- private function sortBySelectorPrecedence($a, $b) {
- $precedenceA = $this->getCSSSelectorPrecedence($a['selector']);
- $precedenceB = $this->getCSSSelectorPrecedence($b['selector']);
+ /**
+ * Creates a DOMDocument instance with the current HTML.
+ *
+ * @return \DOMDocument
+ */
+ private function createXmlDocument() {
+ $xmlDocument = new \DOMDocument;
+ $xmlDocument->encoding = self::ENCODING;
+ $xmlDocument->strictErrorChecking = FALSE;
+ $xmlDocument->formatOutput = TRUE;
+ $libxmlState = libxml_use_internal_errors(TRUE);
+ $xmlDocument->loadHTML($this->getUnifiedHtml());
+ libxml_clear_errors();
+ libxml_use_internal_errors($libxmlState);
+ $xmlDocument->normalizeDocument();
+
+ return $xmlDocument;
+ }
- // we want these sorted ascendingly so selectors with lesser precedence get processed first and
- // selectors with greater precedence get sorted last
- return ($precedenceA == $precedenceB) ? ($a['line'] < $b['line'] ? -1 : 1) : ($precedenceA < $precedenceB ? -1 : 1);
+ /**
+ * Returns the HTML with the non-ASCII characters converts into HTML entities and the unprocessable HTML tags removed.
+ *
+ * @return string the unified HTML
+ *
+ * @throws \BadMethodCallException
+ */
+ private function getUnifiedHtml() {
+ if (!empty($this->unprocessableHtmlTags)) {
+ $unprocessableHtmlTags = implode('|', $this->unprocessableHtmlTags);
+ $bodyWithoutUnprocessableTags = preg_replace('/<\\/?(' . $unprocessableHtmlTags . ')[^>]*>/i', '', $this->html);
+ } else {
+ $bodyWithoutUnprocessableTags = $this->html;
+ }
+
+ return mb_convert_encoding($bodyWithoutUnprocessableTags, 'HTML-ENTITIES', self::ENCODING);
}
- private function getCSSSelectorPrecedence($selector) {
- $selectorkey = md5($selector);
- if (!isset($this->caches[CACHE_SELECTOR][$selectorkey])) {
+ /**
+ * @param array $a
+ * @param array $b
+ *
+ * @return integer
+ */
+ private function sortBySelectorPrecedence(array $a, array $b) {
+ $precedenceA = $this->getCssSelectorPrecedence($a['selector']);
+ $precedenceB = $this->getCssSelectorPrecedence($b['selector']);
+
+ // We want these sorted in ascending order so selectors with lesser precedence get processed first and
+ // selectors with greater precedence get sorted last.
+ // The parenthesis around the -1 are necessary to avoid a PHP_CodeSniffer warning about missing spaces around
+ // arithmetic operators.
+ // @see http://forge.typo3.org/issues/55605
+ $precedenceForEquals = ($a['line'] < $b['line'] ? (-1) : 1);
+ $precedenceForNotEquals = ($precedenceA < $precedenceB ? (-1) : 1);
+ return ($precedenceA === $precedenceB) ? $precedenceForEquals : $precedenceForNotEquals;
+ }
+
+ /**
+ * @param string $selector
+ *
+ * @return integer
+ */
+ private function getCssSelectorPrecedence($selector) {
+ $selectorKey = md5($selector);
+ if (!isset($this->caches[self::CACHE_KEY_SELECTOR][$selectorKey])) {
$precedence = 0;
$value = 100;
- $search = array('\#','\.',''); // ids: worth 100, classes: worth 10, elements: worth 1
+ // ids: worth 100, classes: worth 10, elements: worth 1
+ $search = array('\\#','\\.','');
foreach ($search as $s) {
- if (trim($selector == '')) break;
- $num = 0;
- $selector = preg_replace('/'.$s.'\w+/','',$selector,-1,$num);
- $precedence += ($value * $num);
+ if (trim($selector == '')) {
+ break;
+ }
+ $number = 0;
+ $selector = preg_replace('/' . $s . '\\w+/', '', $selector, -1, $number);
+ $precedence += ($value * $number);
$value /= 10;
}
- $this->caches[CACHE_SELECTOR][$selectorkey] = $precedence;
+ $this->caches[self::CACHE_KEY_SELECTOR][$selectorKey] = $precedence;
}
- return $this->caches[CACHE_SELECTOR][$selectorkey];
+ return $this->caches[self::CACHE_KEY_SELECTOR][$selectorKey];
}
- // right now we support all CSS 1 selectors and most CSS2/3 selectors.
- // http://plasmasturm.org/log/444/
- private function translateCSStoXpath($css_selector) {
-
- $css_selector = trim($css_selector);
- $xpathkey = md5($css_selector);
- if (!isset($this->caches[CACHE_XPATH][$xpathkey])) {
+ /**
+ * Right now, we support all CSS 1 selectors and most CSS2/3 selectors.
+ *
+ * @see http://plasmasturm.org/log/444/
+ *
+ * @param string $cssSelector
+ *
+ * @return string
+ */
+ private function translateCssToXpath($cssSelector) {
+ $cssSelector = trim($cssSelector);
+ $xpathKey = md5($cssSelector);
+ if (!isset($this->caches[self::CACHE_KEY_XPATH][$xpathKey])) {
// returns an Xpath selector
$search = array(
- '/\s+>\s+/', // Matches any element that is a child of parent.
- '/\s+\+\s+/', // Matches any element that is an adjacent sibling.
- '/\s+/', // Matches any element that is a descendant of an parent element element.
- '/([^\/]+):first-child/i', // first-child pseudo-selector
- '/([^\/]+):last-child/i', // last-child pseudo-selector
- '/(\w)\[(\w+)\]/', // Matches element with attribute
- '/(\w)\[(\w+)\=[\'"]?(\w+)[\'"]?\]/', // Matches element with EXACT attribute
+ // Matches any element that is a child of parent.
+ '/\\s+>\\s+/',
+ // Matches any element that is an adjacent sibling.
+ '/\\s+\\+\\s+/',
+ // Matches any element that is a descendant of an parent element element.
+ '/\\s+/',
+ // first-child pseudo-selector
+ '/([^\\/]+):first-child/i',
+ // last-child pseudo-selector
+ '/([^\\/]+):last-child/i',
+ // Matches element with attribute
+ '/(\\w)\\[(\\w+)\\]/',
+ // Matches element with EXACT attribute
+ '/(\\w)\\[(\\w+)\\=[\'"]?(\\w+)[\'"]?\\]/',
);
$replace = array(
- '/',
- '/following-sibling::*[1]/self::',
- '//',
- '*[1]/self::\\1',
- '*[last()]/self::\\1',
- '\\1[@\\2]',
- '\\1[@\\2="\\3"]',
+ '/',
+ '/following-sibling::*[1]/self::',
+ '//',
+ '*[1]/self::\\1',
+ '*[last()]/self::\\1',
+ '\\1[@\\2]',
+ '\\1[@\\2="\\3"]',
);
- $css_selector = '//'.preg_replace($search, $replace, $css_selector);
+ $cssSelector = '//' . preg_replace($search, $replace, $cssSelector);
- // matches ids and classes
- $css_selector = preg_replace_callback('/(\w+)?\#([\w\-]+)/', array($this, 'matchIdAttributes'), $css_selector);
- $css_selector = preg_replace_callback('/(\w+|[\*\]])?((\.[\w\-]+)+)/', array($this, 'matchClassAttributes'), $css_selector);
+ $cssSelector = preg_replace_callback(self::ID_ATTRIBUTE_MATCHER, array($this, 'matchIdAttributes'), $cssSelector);
+ $cssSelector = preg_replace_callback(self::CLASS_ATTRIBUTE_MATCHER, array($this, 'matchClassAttributes'), $cssSelector);
- // advanced selectors are going to require a bit more advanced emogrification
- // if we required PHP 5.3 we could do this with closures
- $css_selector = preg_replace_callback('/([^\/]+):nth-child\(\s*(odd|even|[+\-]?\d|[+\-]?\d?n(\s*[+\-]\s*\d)?)\s*\)/i', array($this, 'translateNthChild'), $css_selector);
- $css_selector = preg_replace_callback('/([^\/]+):nth-of-type\(\s*(odd|even|[+\-]?\d|[+\-]?\d?n(\s*[+\-]\s*\d)?)\s*\)/i', array($this, 'translateNthOfType'), $css_selector);
+ // Advanced selectors are going to require a bit more advanced emogrification.
+ // When we required PHP 5.3, we could do this with closures.
+ $cssSelector = preg_replace_callback(
+ '/([^\\/]+):nth-child\\(\s*(odd|even|[+\-]?\\d|[+\\-]?\\d?n(\\s*[+\\-]\\s*\\d)?)\\s*\\)/i',
+ array($this, 'translateNthChild'), $cssSelector
+ );
+ $cssSelector = preg_replace_callback(
+ '/([^\\/]+):nth-of-type\\(\s*(odd|even|[+\-]?\\d|[+\\-]?\\d?n(\\s*[+\\-]\\s*\\d)?)\\s*\\)/i',
+ array($this, 'translateNthOfType'), $cssSelector
+ );
- $this->caches[CACHE_SELECTOR][$xpathkey] = $css_selector;
+ $this->caches[self::CACHE_KEY_SELECTOR][$xpathKey] = $cssSelector;
}
- return $this->caches[CACHE_SELECTOR][$xpathkey];
+ return $this->caches[self::CACHE_KEY_SELECTOR][$xpathKey];
}
- private function matchIdAttributes($m) {
- return (strlen($m[1]) ? $m[1] : '*').'[@id="'.$m[2].'"]';
+ /**
+ * @param array $match
+ *
+ * @return string
+ */
+ private function matchIdAttributes(array $match) {
+ return (strlen($match[1]) ? $match[1] : '*') . '[@id="' . $match[2] . '"]';
}
- private function matchClassAttributes($m) {
- return (strlen($m[1]) ? $m[1] : '*').'[contains(concat(" ",@class," "),concat(" ","'.implode('"," "))][contains(concat(" ",@class," "),concat(" ","',explode('.',substr($m[2],1))).'"," "))]';
+ /**
+ * @param array $match
+ *
+ * @return string
+ */
+ private function matchClassAttributes(array $match) {
+ return (strlen($match[1]) ? $match[1] : '*') . '[contains(concat(" ",@class," "),concat(" ","' .
+ implode(
+ '"," "))][contains(concat(" ",@class," "),concat(" ","',
+ explode('.', substr($match[2], 1))
+ ) . '"," "))]';
}
- private function translateNthChild($match) {
-
+ /**
+ * @param array $match
+ *
+ * @return string
+ */
+ private function translateNthChild(array $match) {
$result = $this->parseNth($match);
if (isset($result[self::MULTIPLIER])) {
if ($result[self::MULTIPLIER] < 0) {
$result[self::MULTIPLIER] = abs($result[self::MULTIPLIER]);
- return sprintf("*[(last() - position()) mod %u = %u]/self::%s", $result[self::MULTIPLIER], $result[self::INDEX], $match[1]);
+ return sprintf('*[(last() - position()) mod %u = %u]/self::%s', $result[self::MULTIPLIER], $result[self::INDEX], $match[1]);
} else {
- return sprintf("*[position() mod %u = %u]/self::%s", $result[self::MULTIPLIER], $result[self::INDEX], $match[1]);
+ return sprintf('*[position() mod %u = %u]/self::%s', $result[self::MULTIPLIER], $result[self::INDEX], $match[1]);
}
} else {
- return sprintf("*[%u]/self::%s", $result[self::INDEX], $match[1]);
+ return sprintf('*[%u]/self::%s', $result[self::INDEX], $match[1]);
}
}
- private function translateNthOfType($match) {
-
+ /**
+ * @param array $match
+ *
+ * @return string
+ */
+ private function translateNthOfType(array $match) {
$result = $this->parseNth($match);
if (isset($result[self::MULTIPLIER])) {
if ($result[self::MULTIPLIER] < 0) {
$result[self::MULTIPLIER] = abs($result[self::MULTIPLIER]);
- return sprintf("%s[(last() - position()) mod %u = %u]", $match[1], $result[self::MULTIPLIER], $result[self::INDEX]);
+ return sprintf('%s[(last() - position()) mod %u = %u]', $match[1], $result[self::MULTIPLIER], $result[self::INDEX]);
} else {
- return sprintf("%s[position() mod %u = %u]", $match[1], $result[self::MULTIPLIER], $result[self::INDEX]);
+ return sprintf('%s[position() mod %u = %u]', $match[1], $result[self::MULTIPLIER], $result[self::INDEX]);
}
} else {
- return sprintf("%s[%u]", $match[1], $result[self::INDEX]);
+ return sprintf('%s[%u]', $match[1], $result[self::INDEX]);
}
}
- private function parseNth($match) {
-
+ /**
+ * @param array $match
+ *
+ * @return array
+ */
+ private function parseNth(array $match) {
if (in_array(strtolower($match[2]), array('even','odd'))) {
$index = strtolower($match[2]) == 'even' ? 0 : 1;
return array(self::MULTIPLIER => 2, self::INDEX => $index);
- // if there is a multiplier
- } else if (stripos($match[2], 'n') === false) {
+ } elseif (stripos($match[2], 'n') === FALSE) {
+ // if there is a multiplier
$index = intval(str_replace(' ', '', $match[2]));
return array(self::INDEX => $index);
} else {
-
if (isset($match[3])) {
- $multiple_term = str_replace($match[3], '', $match[2]);
+ $multipleTerm = str_replace($match[3], '', $match[2]);
$index = intval(str_replace(' ', '', $match[3]));
} else {
- $multiple_term = $match[2];
+ $multipleTerm = $match[2];
$index = 0;
}
- $multiplier = str_ireplace('n', '', $multiple_term);
+ $multiplier = str_ireplace('n', '', $multipleTerm);
- if (!strlen($multiplier)) $multiplier = 1;
- elseif ($multiplier == 0) return array(self::INDEX => $index);
- else $multiplier = intval($multiplier);
+ if (!strlen($multiplier)) {
+ $multiplier = 1;
+ } elseif ($multiplier == 0) {
+ return array(self::INDEX => $index);
+ } else {
+ $multiplier = intval($multiplier);
+ }
- while ($index < 0) $index += abs($multiplier);
+ while ($index < 0) {
+ $index += abs($multiplier);
+ }
return array(self::MULTIPLIER => $multiplier, self::INDEX => $index);
}
}
- private function cssStyleDefinitionToArray($style) {
- $definitions = explode(';',$style);
- $retArr = array();
- foreach ($definitions as $def) {
- if (empty($def) || strpos($def, ':') === false) continue;
- list($key,$value) = explode(':',$def,2);
- if (empty($key) || strlen(trim($value)) === 0) continue;
- $retArr[trim($key)] = trim($value);
+ /**
+ * Parses a CSS declaration block into property name/value pairs.
+ *
+ * Example:
+ *
+ * The declaration block
+ *
+ * "color: #000; font-weight: bold;"
+ *
+ * will be parsed into the following array:
+ *
+ * "color" => "#000"
+ * "font-weight" => "bold"
+ *
+ * @param string $cssDeclarationBlock the CSS declaration block without the curly braces, may be empty
+ *
+ * @return array the CSS declarations with the property names as array keys and the property values as array values
+ */
+ private function parseCssDeclarationBlock($cssDeclarationBlock) {
+ $properties = array();
+
+ $declarations = explode(';', $cssDeclarationBlock);
+ foreach ($declarations as $declaration) {
+ $matches = array();
+ if (!preg_match('/ *([a-z\-]+) *: *([^;]+) */', $declaration, $matches)) {
+ continue;
+ }
+ $propertyName = $matches[1];
+ $propertyValue = $matches[2];
+ $properties[$propertyName] = $propertyValue;
}
- return $retArr;
+
+ return $properties;
}
-} \ No newline at end of file
+}