'; private static $jsComment = ''; protected $js = ''; protected $css = ''; /** * @var OutputBuffer */ protected $outputBuffer; private $headTokens = array(); private $useAlternativeAction = false; protected function init() { if (is_admin()) { $this->useAlternativeAction = true; } if (defined('WP_CLI') && WP_CLI) { //Do not start output buffering while WP_CLI active } else { $this->outputBuffer = OutputBuffer::getInstance(); if (defined('SMART_SLIDER_OB_START') && SMART_SLIDER_OB_START >= 0) { $this->outputBuffer->setExtraObStart(SMART_SLIDER_OB_START); } $this->addInjectCSSJSComment(); add_filter('wordpress_prepare_output', array( $this, 'prepareOutput' )); } } public function prepareOutput($buffer) { static $once = false; if (!$once) { $once = true; $this->finalizeCssJs(); if (!empty($this->css)) { $n2cssPos = strpos($buffer, self::$cssComment); if ($n2cssPos !== false) { $buffer = substr_replace($buffer, $this->css, $n2cssPos, strlen(self::$cssComment)); $this->css = ''; } else { $parts = preg_split('/<\/head[\s]*>/i', $buffer, 2); // There might be no head and it would result a notice. if (count($parts) == 2) { list($head, $body) = $parts; /** * We must tokenize the HTML comments in the head to prepare for condition CSS/scripts * Eg.: */ $head = preg_replace_callback('//s', array( $this, 'tokenizeHead' ), $head); $head = preg_replace_callback('/

.*?<\/noscript>/s', array( $this, 'tokenizeHead' ), $head); $lastStylesheetPosition = strrpos($head, "<link rel='stylesheet'"); if ($lastStylesheetPosition === false) { $lastStylesheetPosition = strrpos($head, "<link rel=\"stylesheet\""); if ($lastStylesheetPosition === false) { $lastStylesheetPosition = strrpos($head, "<link"); } } if ($lastStylesheetPosition !== false) { /** * Find the end of the tag <link tag */ $lastStylesheetPositionEnd = strpos($head, ">", $lastStylesheetPosition); if ($lastStylesheetPositionEnd !== false) { /** * Insert JS after the ending > */ $head = substr_replace($head, $this->js, $lastStylesheetPositionEnd + 1, 0); $this->js = ''; /** * Restore HTML comments */ $head = preg_replace_callback('//', array( $this, 'restoreHeadTokens' ), $head); $buffer = $head . '</head>' . $body; } } } } } if ($this->css != '' || $this->js != '') { $parts = preg_split('/<\/head[\s]*>/', $buffer, 2); return implode($this->css . $this->js . '</head>', $parts); } } return $buffer; } public function tokenizeHead($matches) { $index = count($this->headTokens); $this->headTokens[$index] = $matches[0]; return ''; } public function restoreHeadTokens($matches) { return $this->headTokens[$matches[1]]; } private function finalizeCssJs() { static $finalized = false; if (!$finalized) { $finalized = true; if (class_exists('\\Nextend\\Framework\\Asset\\AssetManager', false)) { $this->css = AssetManager::getCSS(); $this->js = AssetManager::getJs(); } } return true; } public function addInjectCSSJSComment() { if (!$this->useAlternativeAction) { add_action('wp_print_scripts', array( $this, 'injectCSSJSComment' )); } else { /** * @see SSDEV-3909 * The Site editor fires the wp_print_scripts action inside a the wp.editSite.initializeEditor script. * The Widgets editor fires the wp_print_scripts action inside a the wp.editWidgets.initialize script. * The Customizer fires the wp_print_scripts action inside a the wp.customizeWidgets.initialize script. */ add_action('admin_head', array( $this, 'injectCSSJSComment' )); add_action('customize_controls_print_scripts', array( $this, 'injectCSSJSComment' )); } } public function removeInjectCSSJSComment() { if (!$this->useAlternativeAction) { remove_action('wp_print_scripts', array( $this, 'injectCSSJSComment' )); } else { /** * @see SSDEV-3909 * The Site editor fires the wp_print_scripts action inside a the wp.editSite.initializeEditor script. * The Widgets editor fires the wp_print_scripts action inside a the wp.editWidgets.initialize script. * The Customizer fires the wp_print_scripts action inside a the wp.customizeWidgets.initialize script. */ remove_action('admin_head', array( $this, 'injectCSSJSComment' )); remove_action('customize_controls_print_scripts', array( $this, 'injectCSSJSComment' )); } } public function injectCSSJSComment() { static $once; if (!$once) { echo wp_kses(self::$cssComment, array()); echo wp_kses(self::$jsComment, array()); $once = true; } } }