File manager

File manager - Edit - /home/adiance/public_html/wp-content/plugins/amp/vendor/ampproject/optimizer/src/Transformer/ReorderHead.php

Back
<?php namespace AmpProject\Optimizer\Transformer; use AmpProject\Amp; use AmpProject\Attribute; use AmpProject\Dom\Document; use AmpProject\Optimizer\ErrorCollection; use AmpProject\Optimizer\Transformer; use AmpProject\Tag; use DOMElement; use DOMNode; use DOMNodeList; /** * Transformer applying the head reordering transformations to the HTML input. * * ReorderHead reorders the children of <head>. Specifically, it * orders the <head> like so: * (0) <meta charset> tag * (1) <style amp-runtime> (inserted by AmpRuntimeCss transformer) * (2) remaining <meta> tags (those other than <meta charset>) * (3) AMP runtime .js <script> tag * (4) AMP viewer runtime .js <script> * (5) <script> tags that are render delaying * (6) <script> tags for remaining extensions * (7) <link> tag for favicons * (8) <link> tag for resource hints * (9) <link rel=stylesheet> tags before <style amp-custom> * (10) <style amp-custom> * (11) any other tags allowed in <head> * (12) AMP boilerplate (first style amp-boilerplate, then noscript) * * This is ported from the NodeJS optimizer while verifying against the Go version. * * NodeJS: * @version c92d6023ea4c9edadff593742a992da2b400a75d * @link https://github.com/ampproject/amp-toolbox/blob/c92d6023ea4c9edadff593742a992da2b400a75d/packages/optimizer/lib/transformers/ReorderHeadTransformer.js * * Go: * @version ea0959046c179953de43077eafaeb720f9b20bdf * @link https://github.com/ampproject/amppackager/blob/ea0959046c179953de43077eafaeb720f9b20bdf/transformer/transformers/reorderhead.go * * @package ampproject/optimizer / final class ReorderHead implements Transformer { /* * Regular expression pattern to match resource hints pointing to an AMP resource. / const AMP_RESOURCE_HINT_SRC_PATTERN = '#(^\|[\b/])cdn\.ampproject\.org($\|[\b/])#i'; / * Different categories of <head> tags to track and reorder. / private $ampResourceHints = []; private $linkIcons = []; private $linkStyleAmpRuntime = null; private $linkStylesheetsBeforeAmpCustom = []; private $metaCharset = null; private $metaOther = []; private $noscript = null; private $others = []; private $resourceHintLinks = []; private $scriptAmpRuntime = null; private $scriptAmpViewer = null; private $scriptNonRenderDelayingExtensions = []; private $scriptRenderDelayingExtensions = []; private $styleAmpBoilerplate = null; private $styleAmpCustom = null; private $styleAmpRuntime = null; /* * Apply transformations to the provided DOM document. * * @param Document $document DOM document to apply the transformations to. * @param ErrorCollection $errors Collection of errors that are collected during transformation. * @return void / public function transform(Document $document, ErrorCollection $errors) { $nodes = $document->head->childNodes; if (! $nodes instanceof DOMNodeList \|\| $nodes->length === 0) { return; } while ($document->head->hasChildNodes()) { $node = $document->head->removeChild($document->head->firstChild); $this->registerNode($node); } $this->deduplicateAndSortCustomNodes(); $this->appendToHead($document); } /* * Register a given node in the appropriate category. * * @param DOMNode $node Node to register. / private function registerNode(DOMNode $node) { if (! $node instanceof DOMElement) { if ($node->nodeType === XML_TEXT_NODE) { $nodeContent = trim($node->textContent); if (empty($nodeContent)) { return; } } $this->others[] = $node; return; } switch ($node->tagName) { case Tag::META: $this->registerMeta($node); break; case Tag::SCRIPT: $this->registerScript($node); break; case Tag::STYLE: $this->registerStyle($node); break; case Tag::LINK: $this->registerLink($node); break; case Tag::NOSCRIPT: $this->noscript = $node; break; default: $this->others[] = $node; } } /* * Register a <meta> node. * * @param DOMElement $node Node to register. / private function registerMeta(DOMElement $node) { if ($node->hasAttribute(Attribute::CHARSET)) { $this->metaCharset = $node; return; } $this->metaOther[] = $node; } /* * Register a <script> node. * * @param DOMElement $node Node to register. / private function registerScript(DOMElement $node) { if (Amp::isRuntimeScript($node)) { $this->scriptAmpRuntime = $node; return; } if (Amp::isViewerScript($node)) { $this->scriptAmpViewer = $node; return; } if ($node->hasAttribute(Attribute::CUSTOM_ELEMENT)) { if (Amp::isRenderDelayingExtension($node)) { $this->scriptRenderDelayingExtensions[] = $node; return; } $this->scriptNonRenderDelayingExtensions[] = $node; return; } if ($node->hasAttribute(Attribute::CUSTOM_TEMPLATE)) { $this->scriptNonRenderDelayingExtensions[] = $node; return; } if ($node->hasAttribute(Attribute::HOST_SERVICE)) { $this->scriptNonRenderDelayingExtensions[] = $node; return; } $this->others[] = $node; } /* * Register a <style> node. * * @param DOMElement $node Node to register. / private function registerStyle(DOMElement $node) { if ($node->hasAttribute(Attribute::AMP_RUNTIME)) { $this->styleAmpRuntime = $node; return; } if ($node->hasAttribute(Attribute::AMP_CUSTOM)) { $this->styleAmpCustom = $node; return; } if ( $node->hasAttribute(Attribute::AMP_BOILERPLATE) \|\| $node->hasAttribute(Attribute::AMP4ADS_BOILERPLATE) ) { $this->styleAmpBoilerplate = $node; return; } $this->others[] = $node; } /* * Register a <link> node. * * @param DOMElement $node Node to register. / private function registerLink(DOMElement $node) { $rel = $node->getAttribute(Attribute::REL); if ($this->containsWord($rel, Attribute::REL_STYLESHEET)) { $href = $node->getAttribute(Attribute::HREF); if ($href && substr($href, -7) === '/v0.css') { $this->linkStyleAmpRuntime = $node; return; } if (! $this->styleAmpCustom) { // We haven't seen amp-custom yet. $this->linkStylesheetsBeforeAmpCustom[] = $node; return; } } if ($this->containsWord($rel, Attribute::REL_ICON)) { $this->linkIcons[] = $node; return; } if ( $this->containsWord($rel, Attribute::REL_PRELOAD) \|\| $this->containsWord($rel, Attribute::REL_PREFETCH) \|\| $this->containsWord($rel, Attribute::REL_DNS_PREFETCH) \|\| $this->containsWord($rel, Attribute::REL_PRECONNECT) ) { if ($this->isHintForAmp($node)) { $this->ampResourceHints[] = $node; } else { $this->resourceHintLinks[] = $node; } return; } $this->others[] = $node; } /* * Get the name of the custom node or template. * * @param DOMElement $node Node to get the name of. * @return string Name of the custom node or template. Empty string if none found. / private function getName(DOMElement $node) { if ($node->hasAttribute(Attribute::CUSTOM_ELEMENT)) { return $node->getAttribute(Attribute::CUSTOM_ELEMENT); } if ($node->hasAttribute(Attribute::CUSTOM_TEMPLATE)) { return $node->getAttribute(Attribute::CUSTOM_TEMPLATE); } return ''; } /* * Append all registered nodes to the <head> node. * * @param Document $document Document to append the nodes to. / private function appendToHead(Document $document) { $categories = [ 'metaCharset', 'ampResourceHints', 'linkStyleAmpRuntime', 'styleAmpRuntime', 'metaOther', 'scriptAmpRuntime', 'scriptAmpViewer', 'scriptRenderDelayingExtensions', 'scriptNonRenderDelayingExtensions', 'linkIcons', 'resourceHintLinks', // This should probably be higher, but both the Go and NodeJS optimizers have it here. 'linkStylesheetsBeforeAmpCustom', 'styleAmpCustom', 'others', 'styleAmpBoilerplate', 'noscript', ]; foreach ($categories as $category) { if ($this->$category === null) { continue; } if ($this->$category instanceof DOMNode) { $node = $document->importNode($this->$category); $document->head->appendChild($node); } elseif (is_array($this->$category)) { // @todo Maybe sort by attribute-name, attribute-value? foreach ($this->$category as $node) { $node = $document->importNode($node); $document->head->appendChild($node); } } } } /* * Deduplicate and sort custom extensions. / private function deduplicateAndSortCustomNodes() { foreach (['scriptRenderDelayingExtensions', 'scriptNonRenderDelayingExtensions'] as $set) { $sortedNodes = []; foreach ($this->$set as $node) { $sortedNodes[$this->getName($node)] = $node; } ksort($sortedNodes); $this->$set = array_values($sortedNodes); } } /* * Check if a given string contains another string, respecting word boundaries.. * * @param string $haystack Haystack string to look in. * @param string $needle Needle string to search for. * @return bool Whether the needle was found in the haystack. / private function containsWord($haystack, $needle) { if (empty($haystack) \|\| empty($needle)) { return false; } return preg_match('/(^\|\s)' . preg_quote($needle, '/') . '(\s\|$)/i', $haystack); } /* * Check whether a given resource hint link element is pointing to an AMP resource. * * @param DOMElement $node Link element to check. * @return bool Whether the link element is pointing to an AMP resource. */ private function isHintForAmp(DOMElement $node) { $href = $node->getAttribute(Attribute::HREF); if (empty($href)) { return false; } return (bool)preg_match(self::AMP_RESOURCE_HINT_SRC_PATTERN, $href); } }

| ver. 1.4 | Github | . | PHP 7.3.33 | Generation time: 0.07 | proxy | phpinfo | Settings