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<?php |
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|
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class berqStyleOptimizer |
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{ |
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public $loading = 'delay'; |
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public $noscript = ''; |
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|
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function set_loading($loading) |
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{ |
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$this->loading = $loading; |
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} |
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|
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function run_optimization($photonClass, $buffer) |
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{ |
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/* if ($this->loading == 'default') { */ |
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/* return $buffer; */ |
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/* } */ |
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|
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// Load HTML content using Simple HTML DOM |
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$html = str_get_html($buffer); |
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|
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// Process <link> tags with rel="stylesheet" |
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foreach ($html->find('link[rel=stylesheet], link[rel=preload]') as $linkNode) { |
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|
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// Delay and preload use javascript to load CSS |
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if ($this->loading == 'delay' || $this->loading == 'preload') { |
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$this->noscript = $this->noscript.$linkNode->outertext; |
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} |
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|
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// Skip if the link tag already has data-berqwp attribute |
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if ($linkNode->hasAttribute('data-berqwp')) { |
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continue; |
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} |
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|
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$href = trim($linkNode->href); |
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$excluded = false; |
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|
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// If tag has a match for exclude url list |
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if (!empty($photonClass->js_css_exclude_urls)) { |
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foreach ($photonClass->js_css_exclude_urls as $js_exclude_keyword) { |
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if (!empty($js_exclude_keyword)) { |
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/* error_log("$href - $js_exclude_keyword"); */ |
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if (strpos($href, trim($js_exclude_keyword)) !== false) { |
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$excluded = true; |
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break; |
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} |
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} |
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} |
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} |
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|
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if ($excluded) { |
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continue; |
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} |
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|
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|
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|
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if ($linkNode->rel == 'preload' && (!$linkNode->hasAttribute('as') || !$linkNode->hasAttribute('onload') || $linkNode->as !== 'style')) { |
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continue; |
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} |
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|
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|
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if ($photonClass->use_cdn) { |
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|
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$kw_found = false; |
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|
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foreach ($photonClass->css_excluded_keywords as $keyword) { |
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if (stripos($href, $keyword) !== false) { |
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$kw_found = true; |
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} |
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} |
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// Check if the script source contains any excluded keywords |
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if (!$kw_found) { |
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// Send the file URL to CDN as GET parameters |
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/* $cdnUrl = 'https://cdn.berqwp.com/'; */ |
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|
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global $berqCDN; |
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$berqCDN->add_file_in_queue($href); |
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// $cdnUrl = 'https://boost.berqwp.com/photon/cdn/'; |
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// $cdnUrl .= '?url=' . urlencode($href); |
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// $cdnUrl .= '&domain=' . $photonClass->domain; |
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|
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// $photonClass->add_into_cdn_queue($cdnUrl, $href); |
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|
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} |
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} |
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|
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if ($this->loading == 'default') { |
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continue; |
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} |
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|
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// Process or modify <link> tags as needed |
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$linkNode->setAttribute('data-berqwp-style-href', esc_attr($href)); |
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$linkNode->href = ''; |
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|
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unset($linkNode); |
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} |
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|
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// Process <style> tags |
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foreach ($html->find('style') as $styleNode) { |
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|
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// Skip if the style tag already has data-berqwp-style attribute |
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if ($styleNode->hasAttribute('data-berqwp')) { |
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continue; |
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} |
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|
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// Delay and preload use javascript to load CSS |
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if ($this->loading == 'delay' || $this->loading == 'preload') { |
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$this->noscript = $this->noscript.$styleNode->outertext; |
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} |
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|
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if ($photonClass->use_cdn) { |
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$baseUrl = bwp_getBaseUrl($photonClass->site_url); |
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$styleContent = $styleNode->innertext; |
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$matches = bwp_extractUrlsFromCss($styleContent); |
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|
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foreach ($matches as $url) { |
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$absolute_url = bwp_rel2abs($url, $baseUrl); |
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|
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global $berqCDN; |
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$berqCDN->add_file_in_queue($absolute_url); |
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|
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// $cdn_url = "https://boost.berqwp.com/photon/cdn/?url=".urlencode($absolute_url)."&domain=$photonClass->domain"; |
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// $photonClass->add_into_cdn_queue($cdn_url, $absolute_url); |
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} |
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|
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} |
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|
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if ($this->loading == 'default') { |
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continue; |
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} |
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|
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// Commented to let style tags load initially - 26 Jun 2024 |
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// Process or modify <style> tags as needed |
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$styleContent = $styleNode->innertext; |
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// var_dump($styleContent); |
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$nofontface = preg_replace('/@font-face\s*{[^}]+}/i', '', $styleContent); |
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$styleNode->innertext = $nofontface; |
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$styleNode->setAttribute('data-berqwp-style', esc_attr($styleContent)); |
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|
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unset($styleNode); |
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} |
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|
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// Output the modified HTML |
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$buffer = $html->save(); |
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$html->clear(); |
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unset($html); |
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|
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add_filter('berqwp_buffer_before_closing_body', [$this, 'script']); |
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|
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// CSS compatibility for javascript disabled |
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add_filter('berqwp_buffer_before_closing_body', [$this, 'noscript']); |
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|
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unset($photonClass); |
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|
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return $buffer; |
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|
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} |
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|
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function preload_script() |
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{ |
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$script = " |
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<script id='preload-styles' defer> |
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let initialized_style_preload = false; |
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|
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window.addEventListener('load', function () { |
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if (initialized_style_preload) { |
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return; |
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} |
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|
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initialized_style_preload = true; |
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|
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let berqwp_styles = []; |
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let berqwp_linkTags = document.querySelectorAll('link[data-berqwp-style-href]'); |
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|
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// Iterate through each link tag |
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berqwp_linkTags.forEach(function (linkTag, index) { |
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berqwp_styles.push(linkTag.getAttribute('data-berqwp-style-href')) |
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}); |
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|
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(async () => { |
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// Call the function to start fetching all scripts |
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await berqwp_add_assets_browser_cache(berqwp_styles); |
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|
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berqwp_preload_css(); |
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|
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})(); |
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|
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}); |
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|
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|
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function BerqWPcacheResource(resourceUrl) { |
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return caches.open('berqwp-cache').then(cache => { |
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return fetch(resourceUrl).then(response => { |
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return cache.put(resourceUrl, response); |
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}); |
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}); |
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} |
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|
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function berqwp_preload_css() { |
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// Get all link tags containing data-berqwp-style-href |
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let berqwp_linkTags = document.querySelectorAll('link[data-berqwp-style-href]'); |
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|
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// Iterate through each link tag |
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berqwp_linkTags.forEach(function (linkTag, index) { |
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// Set the href attribute of each link tag |
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linkTag.setAttribute('href', linkTag.getAttribute('data-berqwp-style-href')); |
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|
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}); |
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|
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// Get all style tags containing data-berqwp-style |
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var berqwp_styleTags = document.querySelectorAll('style[data-berqwp-style]'); |
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|
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// Loop through each style tag |
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berqwp_styleTags.forEach(function (styleTag) { |
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// Get the value of data-berqwp-style |
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var berqwpStyle = styleTag.getAttribute('data-berqwp-style'); |
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|
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// Set the content of the style tag with the value of data-berqwp-style |
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styleTag.textContent = berqwpStyle; |
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}); |
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|
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// Trigger event when styles are loaded |
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let berqwp_styles_event = new CustomEvent('berqwpStylesLoaded'); |
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|
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// Dispatch the custom event |
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window.dispatchEvent(berqwp_styles_event); |
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|
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|
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} |
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|
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</script> |
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"; |
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|
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return $script; |
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|
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} |
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|
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function delay_script() |
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{ |
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$script = " |
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<script id='delay-styles' defer> |
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|
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function BerqWPcacheResource(resourceUrl) { |
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return caches.open('berqwp-cache').then(cache => { |
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return fetch(resourceUrl).then(response => { |
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return cache.put(resourceUrl, response); |
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}); |
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}); |
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} |
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|
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function berqwp_css_handleUserInteraction() { |
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// Get all link tags containing data-berqwp-style-href |
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let berqwp_linkTags = document.querySelectorAll('link[data-berqwp-style-href]'); |
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|
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// Iterate through each link tag |
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berqwp_linkTags.forEach(function (linkTag, index) { |
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// Set the href attribute of each link tag |
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linkTag.setAttribute('href', linkTag.getAttribute('data-berqwp-style-href')); |
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|
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}); |
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|
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// Get all style tags containing data-berqwp-style |
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var berqwp_styleTags = document.querySelectorAll('style[data-berqwp-style]'); |
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|
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// Loop through each style tag |
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berqwp_styleTags.forEach(function (styleTag) { |
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// Get the value of data-berqwp-style |
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var berqwpStyle = styleTag.getAttribute('data-berqwp-style'); |
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|
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// Set the content of the style tag with the value of data-berqwp-style |
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styleTag.textContent = berqwpStyle; |
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}); |
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|
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// Trigger event when styles are loaded |
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let berqwp_styles_event = new CustomEvent('berqwpStylesLoaded'); |
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|
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// Dispatch the custom event |
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window.dispatchEvent(berqwp_styles_event); |
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|
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|
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// After running the function, remove all event listeners to ensure it runs only once |
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for (let eventType of berqwp_css_interactionEventTypes) { |
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document.removeEventListener(eventType, berqwp_css_handleUserInteraction); |
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} |
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|
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} |
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|
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const berqwp_css_interactionEventTypes = ['click', 'mousemove', 'keydown', 'touchstart', 'scroll']; |
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|
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for (let eventType of berqwp_css_interactionEventTypes) { |
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document.addEventListener(eventType, berqwp_css_handleUserInteraction); |
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} |
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|
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</script> |
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"; |
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|
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return $script; |
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|
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} |
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|
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function script($script_html) |
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{ |
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if ($this->loading == 'delay') { |
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$script_html .= $this->delay_script(); |
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} |
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|
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if ($this->loading == 'preload') { |
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$script_html .= $this->preload_script(); |
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} |
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|
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return $script_html; |
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} |
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|
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function noscript($script_html) |
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{ |
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$script_html .= "<noscript>$this->noscript</noscript>"; |
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|
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return $script_html; |
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} |
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|
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} |
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|
