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update php-readability

This commit is contained in:
Andrew Dolgov 2019-02-13 14:49:27 +03:00
parent 874a2d2170
commit 8b6ef90385
5 changed files with 359 additions and 150 deletions
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42
vendor/andreskrey/Readability/Configuration.php vendored
View File

@ -21,7 +21,7 @@ class Configuration
/**
* @var int
*/
protected $wordThreshold = 500;
protected $charThreshold = 500;
/**
* @var bool
@ -109,9 +109,9 @@ class Configuration
// If no logger has been set, just return a null logger
if ($this->logger === null) {
return new NullLogger();
} else {
return $this->logger;
}
return $this->logger;
}
/**
@ -149,19 +149,45 @@ class Configuration
/**
* @return int
*/
public function getWordThreshold()
public function getCharThreshold()
{
return $this->wordThreshold;
return $this->charThreshold;
}
/**
* @param int $wordThreshold
* @param int $charThreshold
*
* @return $this
*/
public function setWordThreshold($wordThreshold)
public function setCharThreshold($charThreshold)
{
$this->wordThreshold = $wordThreshold;
$this->charThreshold = $charThreshold;
return $this;
}
/**
* @deprecated Use getCharThreshold. Will be removed in version 2.0
*
* @return int
*/
public function getWordThreshold()
{
@trigger_error('getWordThreshold was replaced with getCharThreshold and will be removed in version 3.0', E_USER_DEPRECATED);
return $this->charThreshold;
}
/**
* @param int $charThreshold
*
* @return $this
*/
public function setWordThreshold($charThreshold)
{
@trigger_error('setWordThreshold was replaced with setCharThreshold and will be removed in version 3.0', E_USER_DEPRECATED);
$this->charThreshold = $charThreshold;
return $this;
}

1
vendor/andreskrey/Readability/Nodes/DOM/DOMNode.php vendored
View File

@ -6,6 +6,7 @@ use andreskrey\Readability\Nodes\NodeTrait;
/**
* @method getAttribute($attribute)
* @method hasAttribute($attribute)
*/
class DOMNode extends \DOMNode
{

162
vendor/andreskrey/Readability/Nodes/NodeTrait.php vendored
View File

@ -6,6 +6,7 @@ use andreskrey\Readability\Nodes\DOM\DOMDocument;
use andreskrey\Readability\Nodes\DOM\DOMElement;
use andreskrey\Readability\Nodes\DOM\DOMNode;
use andreskrey\Readability\Nodes\DOM\DOMText;
use DOMNodeList;
/**
* @method \DOMNode removeAttribute($name)
@ -50,6 +51,21 @@ trait NodeTrait
'select',
];
/**
* The commented out elements qualify as phrasing content but tend to be
* removed by readability when put into paragraphs, so we ignore them here.
*
* @var array
*/
private $phrasing_elems = [
// 'CANVAS', 'IFRAME', 'SVG', 'VIDEO',
'abbr', 'audio', 'b', 'bdo', 'br', 'button', 'cite', 'code', 'data',
'datalist', 'dfn', 'em', 'embed', 'i', 'img', 'input', 'kbd', 'label',
'mark', 'math', 'meter', 'noscript', 'object', 'output', 'progress', 'q',
'ruby', 'samp', 'script', 'select', 'small', 'span', 'strong', 'sub',
'sup', 'textarea', 'time', 'var', 'wbr'
];
/**
* initialized getter.
*
@ -65,7 +81,19 @@ trait NodeTrait
*/
public function isReadabilityDataTable()
{
return $this->readabilityDataTable;
/*
* This is a workaround that I'd like to remove in the future.
* Seems that although we are extending the base DOMElement and adding custom properties (like this one,
* 'readabilityDataTable'), these properties get lost when you search for elements with getElementsByTagName.
* This means that even if we mark the tables in a previous step, when we want to retrieve that information,
* all the custom properties are in their default values. Somehow we need to find a way to make these properties
* permanent across the whole DOM.
*
* @see https://stackoverflow.com/questions/35654709/php-registernodeclass-and-reusing-variable-names
*/
return $this->hasAttribute('readabilityDataTable')
&& $this->getAttribute('readabilityDataTable') === '1';
// return $this->readabilityDataTable;
}
/**
@ -73,7 +101,9 @@ trait NodeTrait
*/
public function setReadabilityDataTable($param)
{
$this->readabilityDataTable = $param;
// Can't be "true" because DOMDocument casts it to "1"
$this->setAttribute('readabilityDataTable', $param ? '1' : '0');
// $this->readabilityDataTable = $param;
}
/**
@ -148,6 +178,24 @@ trait NodeTrait
return '';
}
/**
* Override for native hasAttribute.
*
* @see getAttribute
*
* @param $attributeName
*
* @return bool
*/
public function hasAttribute($attributeName)
{
if (!is_null($this->attributes)) {
return parent::hasAttribute($attributeName);
}
return false;
}
/**
* Get the ancestors of the current node.
*
@ -332,22 +380,26 @@ trait NodeTrait
* Check if a given node has one of its ancestor tag name matching the
* provided one.
*
* @param DOMElement $node
* @param string $tagName
* @param int $maxDepth
* @param callable $filterFn
*
* @return bool
*/
public function hasAncestorTag($node, $tagName, $maxDepth = 3)
public function hasAncestorTag($tagName, $maxDepth = 3, callable $filterFn = null)
{
$depth = 0;
$node = $this;
while ($node->parentNode) {
if ($maxDepth > 0 && $depth > $maxDepth) {
return false;
}
if ($node->parentNode->nodeName === $tagName) {
if ($node->parentNode->nodeName === $tagName && (!$filterFn || $filterFn($node->parentNode))) {
return true;
}
$node = $node->parentNode;
$depth++;
}
@ -356,30 +408,29 @@ trait NodeTrait
}
/**
* Checks if the current node has a single child and if that child is a P node.
* Useful to convert <div><p> nodes to a single <p> node and avoid confusing the scoring system since div with p
* tags are, in practice, paragraphs.
* Check if this node has only whitespace and a single element with given tag
* or if it contains no element with given tag or more than 1 element.
*
* @param DOMNode $node
* @param $tag string Name of tag
*
* @return bool
*/
public function hasSinglePNode()
public function hasSingleTagInsideElement($tag)
{
// There should be exactly 1 element child which is a P:
if (count($children = $this->getChildren(true)) !== 1 || $children[0]->nodeName !== 'p') {
// There should be exactly 1 element child with given tag
if (count($children = $this->getChildren(true)) !== 1 || $children[0]->nodeName !== $tag) {
return false;
}
// And there should be no text nodes with real content (param true on ->getChildren)
foreach ($children as $child) {
/** @var $child DOMNode */
if ($child->nodeType === XML_TEXT_NODE && !preg_match('/\S$/', $child->getTextContent())) {
// And there should be no text nodes with real content
return array_reduce($children, function ($carry, $child) {
if (!$carry === false) {
return false;
}
}
return true;
/* @var DOMNode $child */
return !($child->nodeType === XML_TEXT_NODE && !preg_match('/\S$/', $child->getTextContent()));
});
}
/**
@ -431,4 +482,79 @@ trait NodeTrait
);
}
/**
* Determine if a node qualifies as phrasing content.
* https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Content_categories#Phrasing_content.
*
* @return bool
*/
public function isPhrasingContent()
{
return $this->nodeType === XML_TEXT_NODE || in_array($this->nodeName, $this->phrasing_elems) !== false ||
(!is_null($this->childNodes) &&
($this->nodeName === 'a' || $this->nodeName === 'del' || $this->nodeName === 'ins') &&
array_reduce(iterator_to_array($this->childNodes), function ($carry, $node) {
return $node->isPhrasingContent() && $carry;
}, true)
);
}
public function isProbablyVisible()
{
/*
* In the original JS project they check if the node has the style display=none, which unfortunately
* in our case we have no way of knowing that. So we just check for the attribute hidden or "display: none".
*
* Might be a good idea to check for classes or other attributes like 'aria-hidden'
*/
return !preg_match('/display:( )?none/', $this->getAttribute('style')) && !$this->hasAttribute('hidden');
}
public function isWhitespace()
{
return ($this->nodeType === XML_TEXT_NODE && mb_strlen(trim($this->textContent)) === 0) ||
($this->nodeType === XML_ELEMENT_NODE && $this->nodeName === 'br');
}
/**
* This is a hack that overcomes the issue of node shifting when scanning and removing nodes.
*
* In the JS version of getElementsByTagName, if you remove a node it will not appear during the
* foreach. This does not happen in PHP DOMDocument, because if you remove a node, it will still appear but as an
* orphan node and will give an exception if you try to do anything with it.
*
* Shifting also occurs when converting parent nodes (like a P to a DIV), which in that case the found nodes are
* removed from the foreach "pool" but the internal index of the foreach is not aware and skips over nodes that
* never looped over. (index is at position 5, 2 nodes are removed, next one should be node 3, but the foreach tries
* to access node 6)
*
* This function solves this by searching for the nodes on every loop and keeping track of the count differences.
* Because on every loop we call getElementsByTagName again, this could cause a performance impact and should be
* used only when the results of the search are going to be used to remove the nodes.
*
* @param string $tag
*
* @return \Generator
*/
public function shiftingAwareGetElementsByTagName($tag)
{
/** @var $nodes DOMNodeList */
$nodes = $this->getElementsByTagName($tag);
$count = $nodes->length;
for ($i = 0; $i < $count; $i = max(++$i, 0)) {
yield $nodes->item($i);
// Search for all the nodes again
$nodes = $this->getElementsByTagName($tag);
// Subtract the amount of nodes removed from the current index
$i -= $count - $nodes->length;
// Subtract the amount of nodes removed from the current count
$count -= ($count - $nodes->length);
}
}
}

11
vendor/andreskrey/Readability/Nodes/NodeUtility.php vendored
View File

@ -17,13 +17,13 @@ class NodeUtility
* @var array
*/
public static $regexps = [
'unlikelyCandidates' => '/banner|breadcrumbs|combx|comment|community|cover-wrap|disqus|extra|foot|header|legends|menu|related|remark|replies|rss|shoutbox|sidebar|skyscraper|social|sponsor|supplemental|ad-break|agegate|pagination|pager|popup|yom-remote/i',
'unlikelyCandidates' => '/-ad-|banner|breadcrumbs|combx|comment|community|cover-wrap|disqus|extra|foot|header|legends|menu|related|remark|replies|rss|shoutbox|sidebar|skyscraper|social|sponsor|supplemental|ad-break|agegate|pagination|pager|popup|yom-remote/i',
'okMaybeItsACandidate' => '/and|article|body|column|main|shadow/i',
'extraneous' => '/print|archive|comment|discuss|e[\-]?mail|share|reply|all|login|sign|single|utility/i',
'byline' => '/byline|author|dateline|writtenby|p-author/i',
'replaceFonts' => '/<(\/?)font[^>]*>/gi',
'normalize' => '/\s{2,}/',
'videos' => '/\/\/(www\.)?(dailymotion|youtube|youtube-nocookie|player\.vimeo)\.com/i',
'videos' => '/\/\/(www\.)?((dailymotion|youtube|youtube-nocookie|player\.vimeo|v\.qq)\.com|(archive|upload\.wikimedia)\.org|player\.twitch\.tv)/i',
'nextLink' => '/(next|weiter|continue|>([^\|]|$)|»([^\|]|$))/i',
'prevLink' => '/(prev|earl|old|new|<|«)/i',
'whitespace' => '/^\s*$/',
@ -45,8 +45,8 @@ class NodeUtility
{
$next = $node;
while ($next
&& $next->nodeName !== '#text'
&& trim($next->textContent)) {
&& $next->nodeType !== XML_ELEMENT_NODE
&& $next->isWhitespace()) {
$next = $next->nextSibling;
}
@ -57,12 +57,13 @@ class NodeUtility
* Changes the node tag name. Since tagName on DOMElement is a read only value, this must be done creating a new
* element with the new tag name and importing it to the main DOMDocument.
*
* @param DOMNode $node
* @param string $value
* @param bool $importAttributes
*
* @return DOMNode
*/
public static function setNodeTag($node, $value, $importAttributes = false)
public static function setNodeTag($node, $value, $importAttributes = true)
{
$new = new DOMDocument('1.0', 'utf-8');
$new->appendChild($new->createElement($value));

293
vendor/andreskrey/Readability/Readability.php vendored
View File

@ -127,7 +127,7 @@ class Readability
*
* @throws ParseException
*
* @return array|bool
* @return bool
*/
public function parse($html)
{
@ -164,14 +164,11 @@ class Readability
$length = mb_strlen(preg_replace(NodeUtility::$regexps['onlyWhitespace'], '', $result->textContent));
$this->logger->info(sprintf('[Parsing] Article parsed. Amount of words: %s. Current threshold is: %s', $length, $this->configuration->getWordThreshold()));
$this->logger->info(sprintf('[Parsing] Article parsed. Amount of words: %s. Current threshold is: %s', $length, $this->configuration->getCharThreshold()));
$parseSuccessful = true;
if ($result && $length < $this->configuration->getWordThreshold()) {
if ($result && $length < $this->configuration->getCharThreshold()) {
$this->dom = $this->loadHTML($html);
$root = $this->dom->getElementsByTagName('body')->item(0);
$parseSuccessful = false;
if ($this->configuration->getStripUnlikelyCandidates()) {
$this->logger->debug('[Parsing] Threshold not met, trying again setting StripUnlikelyCandidates as false');
@ -204,7 +201,6 @@ class Readability
$this->logger->debug('[Parsing] Threshold not met, but found some content in previous attempts.');
$result = $this->attempts[0]['articleContent'];
$parseSuccessful = true;
break;
}
} else {
@ -212,26 +208,24 @@ class Readability
}
}
if ($parseSuccessful) {
$result = $this->postProcessContent($result);
$result = $this->postProcessContent($result);
// If we haven't found an excerpt in the article's metadata, use the article's
// first paragraph as the excerpt. This can be used for displaying a preview of
// the article's content.
if (!$this->getExcerpt()) {
$this->logger->debug('[Parsing] No excerpt text found on metadata, extracting first p node and using it as excerpt.');
$paragraphs = $result->getElementsByTagName('p');
if ($paragraphs->length > 0) {
$this->setExcerpt(trim($paragraphs->item(0)->textContent));
}
// If we haven't found an excerpt in the article's metadata, use the article's
// first paragraph as the excerpt. This can be used for displaying a preview of
// the article's content.
if (!$this->getExcerpt()) {
$this->logger->debug('[Parsing] No excerpt text found on metadata, extracting first p node and using it as excerpt.');
$paragraphs = $result->getElementsByTagName('p');
if ($paragraphs->length > 0) {
$this->setExcerpt(trim($paragraphs->item(0)->textContent));
}
$this->setContent($result);
$this->logger->info('*** Parse successful :)');
return true;
}
$this->setContent($result);
$this->logger->info('*** Parse successful :)');
return true;
}
/**
@ -292,77 +286,98 @@ class Readability
$this->logger->debug('[Metadata] Retrieving metadata...');
$values = [];
// Match "description", or Twitter's "twitter:description" (Cards)
// in name attribute.
$namePattern = '/^\s*((twitter)\s*:\s*)?(description|title|image)\s*$/i';
// property is a space-separated list of values
$propertyPattern = '/\s*(dc|dcterm|og|twitter)\s*:\s*(author|creator|description|title|image)\s*/i';
// Match Facebook's Open Graph title & description properties.
$propertyPattern = '/^\s*og\s*:\s*(description|title|image)\s*$/i';
// name is a single value
$namePattern = '/^\s*(?:(dc|dcterm|og|twitter|weibo:(article|webpage))\s*[\.:]\s*)?(author|creator|description|title|image)\s*$/i';
// Find description tags.
foreach ($this->dom->getElementsByTagName('meta') as $meta) {
/* @var DOMNode $meta */
$elementName = $meta->getAttribute('name');
$elementProperty = $meta->getAttribute('property');
if (in_array('author', [$elementName, $elementProperty])) {
$this->logger->info(sprintf('[Metadata] Found author: \'%s\'', $meta->getAttribute('content')));
$this->setAuthor($meta->getAttribute('content'));
continue;
}
$content = $meta->getAttribute('content');
$matches = null;
$name = null;
if (preg_match($namePattern, $elementName)) {
$name = $elementName;
} elseif (preg_match($propertyPattern, $elementProperty)) {
$name = $elementProperty;
if ($elementProperty) {
if (preg_match($propertyPattern, $elementProperty, $matches)) {
for ($i = count($matches) - 1; $i >= 0; $i--) {
// Convert to lowercase, and remove any whitespace
// so we can match below.
$name = preg_replace('/\s/', '', mb_strtolower($matches[$i]));
// multiple authors
$values[$name] = trim($content);
}
}
}
if ($name) {
$content = $meta->getAttribute('content');
if (!$matches && $elementName && preg_match($namePattern, $elementName)) {
$name = $elementName;
if ($content) {
// Convert to lowercase and remove any whitespace
// so we can match below.
$name = preg_replace('/\s/', '', strtolower($name));
// Convert to lowercase, remove any whitespace, and convert dots
// to colons so we can match below.
$name = preg_replace(['/\s/', '/\./'], ['', ':'], mb_strtolower($name));
$values[$name] = trim($content);
}
}
}
if (array_key_exists('description', $values)) {
$this->logger->info(sprintf('[Metadata] Found excerpt in \'description\' tag: \'%s\'', $values['description']));
$this->setExcerpt($values['description']);
} elseif (array_key_exists('og:description', $values)) {
// Use facebook open graph description.
$this->logger->info(sprintf('[Metadata] Found excerpt in \'og:description\' tag: \'%s\'', $values['og:description']));
$this->setExcerpt($values['og:description']);
} elseif (array_key_exists('twitter:description', $values)) {
// Use twitter cards description.
$this->logger->info(sprintf('[Metadata] Found excerpt in \'twitter:description\' tag: \'%s\'', $values['twitter:description']));
$this->setExcerpt($values['twitter:description']);
}
$this->setTitle($this->getArticleTitle());
// get title
/*
* This is a very convoluted way of extracting the first matching key of the $values array
* against a set of options.
*
* This could be easily replaced with an ugly set of isset($values['key']) or a bunch of ??s.
* Will probably replace it with ??s after dropping support of PHP5.6
*/
$key = current(array_intersect([
'dc:title',
'dcterm:title',
'og:title',
'weibo:article:title',
'weibo:webpage:title',
'title',
'twitter:title'
], array_keys($values)));
$this->setTitle(isset($values[$key]) ? trim($values[$key]) : null);
if (!$this->getTitle()) {
if (array_key_exists('og:title', $values)) {
// Use facebook open graph title.
$this->logger->info(sprintf('[Metadata] Found title in \'og:title\' tag: \'%s\'', $values['og:title']));
$this->setTitle($values['og:title']);
} elseif (array_key_exists('twitter:title', $values)) {
// Use twitter cards title.
$this->logger->info(sprintf('[Metadata] Found title in \'twitter:title\' tag: \'%s\'', $values['twitter:title']));
$this->setTitle($values['twitter:title']);
}
$this->setTitle($this->getArticleTitle());
}
if (array_key_exists('og:image', $values) || array_key_exists('twitter:image', $values)) {
if (array_key_exists('og:image', $values)) {
$this->logger->info(sprintf('[Metadata] Found main image in \'og:image\' tag: \'%s\'', $values['og:image']));
$this->setImage($values['og:image']);
} else {
$this->logger->info(sprintf('[Metadata] Found main image in \'twitter:image\' tag: \'%s\'', $values['twitter:image']));
$this->setImage($values['twitter:image']);
}
}
// get author
$key = current(array_intersect([
'dc:creator',
'dcterm:creator',
'author'
], array_keys($values)));
$this->setAuthor(isset($values[$key]) ? $values[$key] : null);
// get description
$key = current(array_intersect([
'dc:description',
'dcterm:description',
'og:description',
'weibo:article:description',
'weibo:webpage:description',
'description',
'twitter:description'
], array_keys($values)));
$this->setExcerpt(isset($values[$key]) ? $values[$key] : null);
// get main image
$key = current(array_intersect([
'og:image',
'twitter:image'
], array_keys($values)));
$this->setImage(isset($values[$key]) ? $values[$key] : null);
}
/**
@ -453,7 +468,7 @@ class Readability
return null;
}
$curTitle = $originalTitle;
$curTitle = $originalTitle = trim($originalTitle);
$titleHadHierarchicalSeparators = false;
/*
@ -623,8 +638,6 @@ class Readability
*/
while ($node) {
$matchString = $node->getAttribute('class') . ' ' . $node->getAttribute('id');
// Remove DOMComments nodes as we don't need them and mess up children counting
if ($node->nodeType === XML_COMMENT_NODE) {
$this->logger->debug(sprintf('[Get Nodes] Found comment node, removing... Node content was: \'%s\'', substr($node->nodeValue, 0, 128)));
@ -632,6 +645,14 @@ class Readability
continue;
}
$matchString = $node->getAttribute('class') . ' ' . $node->getAttribute('id');
if (!$node->isProbablyVisible()) {
$this->logger->debug(sprintf('[Get Nodes] Removing hidden node... Match string was: \'%s\'', $matchString));
$node = NodeUtility::removeAndGetNext($node);
continue;
}
// Check to see if this node is a byline, and remove it if it is.
if ($this->checkByline($node, $matchString)) {
$this->logger->debug(sprintf('[Get Nodes] Found byline, removing... Node content was: \'%s\'', substr($node->nodeValue, 0, 128)));
@ -671,13 +692,35 @@ class Readability
// Turn all divs that don't have children block level elements into p's
if ($node->nodeName === 'div') {
// Put phrasing content into paragraphs.
$p = null;
$childNode = $node->firstChild;
while ($childNode) {
$nextSibling = $childNode->nextSibling;
if ($childNode->isPhrasingContent()) {
if ($p !== null) {
$p->appendChild($childNode);
} elseif (!$childNode->isWhitespace()) {
$p = $this->dom->createElement('p');
$node->replaceChild($p, $childNode);
$p->appendChild($childNode);
}
} elseif ($p !== null) {
while ($p->lastChild && $p->lastChild->isWhitespace()) {
$p->removeChild($p->lastChild);
}
$p = null;
}
$childNode = $nextSibling;
}
/*
* Sites like http://mobile.slate.com encloses each paragraph with a DIV
* element. DIVs with only a P element inside and no text content can be
* safely converted into plain P elements to avoid confusing the scoring
* algorithm with DIVs with are, in practice, paragraphs.
*/
if ($node->hasSinglePNode()) {
if ($node->hasSingleTagInsideElement('p') && $node->getLinkDensity() < 0.25) {
$this->logger->debug(sprintf('[Get Nodes] Found DIV with a single P node, removing DIV. Node content is: \'%s\'', substr($node->nodeValue, 0, 128)));
$pNode = $node->getChildren(true)[0];
$node->parentNode->replaceChild($pNode, $node);
@ -687,16 +730,6 @@ class Readability
$this->logger->debug(sprintf('[Get Nodes] Found DIV with a single child block element, converting to a P node. Node content is: \'%s\'', substr($node->nodeValue, 0, 128)));
$node = NodeUtility::setNodeTag($node, 'p');
$elementsToScore[] = $node;
} else {
// EXPERIMENTAL
foreach ($node->getChildren() as $child) {
/** @var $child DOMNode */
if ($child->nodeType === XML_TEXT_NODE && mb_strlen(trim($child->getTextContent())) > 0) {
$this->logger->debug(sprintf('[Get Nodes] Found DIV a text node inside, converting to a P node. Node content is: \'%s\'', substr($node->nodeValue, 0, 128)));
$newNode = $node->createNode($child, 'p');
$child->parentNode->replaceChild($newNode, $child);
}
}
}
}
@ -751,7 +784,7 @@ class Readability
if (gettype($text) == 'string') {
$byline = trim($text);
return (mb_strlen($byline) > 0) && (mb_strlen($text) < 100);
return (mb_strlen($byline) > 0) && (mb_strlen($byline) < 100);
}
return false;
@ -764,15 +797,10 @@ class Readability
*/
private function removeScripts(DOMDocument $dom)
{
$toRemove = ['script', 'noscript'];
foreach ($toRemove as $tag) {
while ($script = $dom->getElementsByTagName($tag)) {
if ($script->item(0)) {
$script->item(0)->parentNode->removeChild($script->item(0));
} else {
break;
}
foreach (['script', 'noscript'] as $tag) {
$nodes = $dom->getElementsByTagName($tag);
foreach (iterator_to_array($nodes) as $node) {
NodeUtility::removeNode($node);
}
}
}
@ -786,15 +814,7 @@ class Readability
{
$this->logger->info('[PrepDocument] Preparing document for parsing...');
/*
* DOMNodeList must be converted to an array before looping over it.
* This is done to avoid node shifting when removing nodes.
*
* Reverse traversing cannot be done here because we need to find brs that are right next to other brs.
* (If we go the other way around we need to search for previous nodes forcing the creation of new functions
* that will be used only here)
*/
foreach (iterator_to_array($dom->getElementsByTagName('br')) as $br) {
foreach ($dom->shiftingAwareGetElementsByTagName('br') as $br) {
$next = $br->nextSibling;
/*
@ -831,12 +851,16 @@ class Readability
while ($next) {
// If we've hit another <br><br>, we're done adding children to this <p>.
if ($next->nodeName === 'br') {
$nextElem = NodeUtility::nextElement($next);
$nextElem = NodeUtility::nextElement($next->nextSibling);
if ($nextElem && $nextElem->nodeName === 'br') {
break;
}
}
if (!$next->isPhrasingContent()) {
break;
}
$this->logger->debug('[PrepDocument] Replacing BR with a P node...');
// Otherwise, make this node a child of the new <p>.
@ -844,6 +868,14 @@ class Readability
$p->appendChild($next);
$next = $sibling;
}
while ($p->lastChild && $p->lastChild->isWhitespace()) {
$p->removeChild($p->lastChild);
}
if ($p->parentNode->tagName === 'p') {
NodeUtility::setNodeTag($p->parentNode, 'div');
}
}
}
@ -853,7 +885,7 @@ class Readability
for ($i = 0; $i < $length; $i++) {
$this->logger->debug('[PrepDocument] Converting font tag into a span tag.');
$font = $fonts->item($length - 1 - $i);
NodeUtility::setNodeTag($font, 'span', true);
NodeUtility::setNodeTag($font, 'span');
}
}
@ -989,7 +1021,9 @@ class Readability
// and whose scores are quite closed with current `topCandidate` node.
$alternativeCandidateAncestors = [];
for ($i = 1; $i < count($topCandidates); $i++) {
if ($topCandidates[$i]->contentScore / $topCandidate->contentScore >= 0.75) {
// In some cases we may end up with a top candidate with zero content score. To avoid dividing by zero
// we have to use max() and replace zero with a low value like 0.1
if ($topCandidates[$i]->contentScore / max($topCandidate->contentScore, 0.1) >= 0.75) {
array_push($alternativeCandidateAncestors, $topCandidates[$i]->getNodeAncestors(false));
}
}
@ -997,7 +1031,9 @@ class Readability
$MINIMUM_TOPCANDIDATES = 3;
if (count($alternativeCandidateAncestors) >= $MINIMUM_TOPCANDIDATES) {
$parentOfTopCandidate = $topCandidate->parentNode;
while ($parentOfTopCandidate->nodeName !== 'body') {
// Check if we are actually dealing with a DOMNode and not a DOMDocument node or higher
while ($parentOfTopCandidate->nodeName !== 'body' && $parentOfTopCandidate->nodeType === XML_ELEMENT_NODE) {
$listsContainingThisAncestor = 0;
for ($ancestorIndex = 0; $ancestorIndex < count($alternativeCandidateAncestors) && $listsContainingThisAncestor < $MINIMUM_TOPCANDIDATES; $ancestorIndex++) {
$listsContainingThisAncestor += (int)in_array($parentOfTopCandidate, $alternativeCandidateAncestors[$ancestorIndex]);
@ -1027,8 +1063,7 @@ class Readability
$scoreThreshold = $lastScore / 3;
/* @var DOMElement $parentOfTopCandidate */
// Check if we are actually dealing with a DOMNode and not a DOMDocument node or higher
while ($parentOfTopCandidate->nodeName !== 'body' && $parentOfTopCandidate->nodeType === XML_ELEMENT_NODE) {
while ($parentOfTopCandidate->nodeName !== 'body') {
$parentScore = $parentOfTopCandidate->contentScore;
if ($parentScore < $scoreThreshold) {
break;
@ -1175,6 +1210,7 @@ class Readability
$this->_clean($article, 'h1');
$this->_clean($article, 'footer');
$this->_clean($article, 'link');
$this->_clean($article, 'aside');
// Clean out elements have "share" in their id/class combinations from final top candidates,
// which means we don't remove the top candidates even they have "share".
@ -1227,6 +1263,22 @@ class Readability
}
}
// Remove single-cell tables
foreach ($article->shiftingAwareGetElementsByTagName('table') as $table) {
/** @var DOMNode $table */
$tbody = $table->hasSingleTagInsideElement('tbody') ? $table->childNodes[0] : $table;
if ($tbody->hasSingleTagInsideElement('tr')) {
$row = $tbody->firstChild;
if ($row->hasSingleTagInsideElement('td')) {
$cell = $row->firstChild;
$cell = NodeUtility::setNodeTag($cell, (array_reduce(iterator_to_array($cell->childNodes), function ($carry, $node) {
return $node->isPhrasingContent() && $carry;
}, true)) ? 'p' : 'div');
$table->parentNode->replaceChild($cell, $table);
}
}
}
return $article;
}
@ -1374,6 +1426,7 @@ class Readability
/**
* @param DOMDocument $article
* @param string $tag Tag to clean conditionally
*
* @return void
*/
@ -1398,7 +1451,9 @@ class Readability
$node = $DOMNodeList->item($length - 1 - $i);
// First check if we're in a data table, in which case don't remove us.
if ($node->hasAncestorTag($node, 'table', -1) && $node->isReadabilityDataTable()) {
if ($node->hasAncestorTag('table', -1, function ($node) {
return $node->isReadabilityDataTable();
})) {
continue;
}
@ -1439,10 +1494,10 @@ class Readability
$contentLength = mb_strlen($node->getTextContent(true));
$haveToRemove =
($img > 1 && $p / $img < 0.5 && !$node->hasAncestorTag($node, 'figure')) ||
($img > 1 && $p / $img < 0.5 && !$node->hasAncestorTag('figure')) ||
(!$isList && $li > $p) ||
($input > floor($p / 3)) ||
(!$isList && $contentLength < 25 && ($img === 0 || $img > 2) && !$node->hasAncestorTag($node, 'figure')) ||
(!$isList && $contentLength < 25 && ($img === 0 || $img > 2) && !$node->hasAncestorTag('figure')) ||
(!$isList && $weight < 25 && $linkDensity > 0.2) ||
($weight >= 25 && $linkDensity > 0.5) ||
(($embedCount === 1 && $contentLength < 75) || $embedCount > 1);
@ -1477,7 +1532,7 @@ class Readability
// Allow youtube and vimeo videos through as people usually want to see those.
if ($isEmbed) {
$attributeValues = [];
foreach ($item->attributes as $name => $value) {
foreach ($item->attributes as $value) {
$attributeValues[] = $value->nodeValue;
}
$attributeValues = implode('|', $attributeValues);