­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ '; var $buffer = ''; var $styles = ''; var $other_output = ''; var $wrote_footer = FALSE; var $run_shutdown = FALSE; var $valid_request = TRUE; /** * Start buffering all generated output. We'll then do two things with the buffer * 1) Find stylesheets lately enqueued and move them to the header * 2) Ensure that wp_print_footer_scripts() is called * @since 1.9.5 */ function __construct() { // Validate the request $this->validate_request(); add_action('init', array(&$this, 'start_buffer'), 1); add_action('wp_footer', array(&$this, 'print_marker'), -1); } /** * Created early as possible in the wp_footer action this is the string to which we * will move JS resources after * @since 1.9.8 */ function print_marker() { print $this->marker; } /** * Determines if the resource manager should perform its routines for this request * @since 1.9.5 * @return bool */ function validate_request() { $retval = TRUE; if(is_admin()) { if(isset($_REQUEST['page']) && !preg_match("#^(wp_user_avatar)#", $_REQUEST['page'])) { $retval = FALSE; } } if(strpos($_SERVER['REQUEST_URI'], 'wp-admin/update') !== FALSE) { $retval = FALSE; } elseif(isset($_GET['display_gallery_iframe'])) { $retval = FALSE; } elseif(defined('WP_ADMIN') && WP_ADMIN && defined('DOING_AJAX') && DOING_AJAX) { $retval = FALSE; } elseif(preg_match("/(js|css|xsl|xml|kml)$/", $_SERVER['REQUEST_URI'])) { $retval = FALSE; } elseif(preg_match("/\\.(\\w{3,4})$/", $_SERVER['REQUEST_URI'], $match)) { if(!in_array($match[1], array('htm', 'html', 'php'))) { $retval = FALSE; } } $this->valid_request = $retval; } /** * Start the output buffers * @since 1.9.5 */ function start_buffer() { if(defined('WPUA_DISABLE_RESOURCE_MANAGER') && WPUA_DISABLE_RESOURCE_MANAGER) { return; } if(apply_filters('run_wpua_resource_manager', $this->valid_request)) { ob_start(array(&$this, 'output_buffer_handler')); ob_start(array(&$this, 'get_buffer')); add_action('wp_print_footer_scripts', array(&$this, 'get_resources'), 1); add_action('admin_print_footer_scripts', array(&$this, 'get_resources'), 1); add_action('shutdown', array(&$this, 'shutdown')); } } /** * @since 1.9.5 */ function get_resources() { ob_start(); wp_print_styles(); print_admin_styles(); $this->styles = ob_get_clean(); if(!is_admin()) { ob_start(); wp_print_scripts(); $this->scripts = ob_get_clean(); } $this->wrote_footer = TRUE; } /** * Output the buffer after PHP execution has ended (but before shutdown) * @since 1.9.5 * @param string $content * @return string */ function output_buffer_handler($content) { return $this->output_buffer(); } /** * Removes the closing tag from the output buffer. We'll then write our own closing tag * in the shutdown function after running wp_print_footer_scripts() * @since 1.9.5 * @param string $content * @return mixed */ function get_buffer($content) { $this->buffer = $content; return ''; } /** * Moves resources to their appropriate place * @since 1.9.5 */ function move_resources() { if($this->valid_request) { // Move stylesheets to head if($this->styles) { $this->buffer = str_ireplace('', $this->styles.'', $this->buffer); } // Move the scripts to the bottom of the page if($this->scripts) { $this->buffer = str_ireplace($this->marker, $this->marker.$this->scripts, $this->buffer); } if($this->other_output) { $this->buffer = str_replace($this->marker, $this->marker.$this->other_output, $this->buffer); } } } /** * When PHP has finished, we output the footer scripts and closing tags * @since 1.9.5 */ function output_buffer($in_shutdown=FALSE) { // If the footer scripts haven't been outputted, then // we need to take action - as they're required if(!$this->wrote_footer) { // If W3TC is installed and activated, we can't output the // scripts and manipulate the buffer, so we can only provide a warning if(defined('W3TC') && defined('WP_DEBUG') && WP_DEBUG && !is_admin()) { if(!defined('DONOTCACHEPAGE')) define('DONOTCACHEPAGE', TRUE); if(!did_action('wp_footer')) { error_log("We're sorry, but your theme's page template didn't make a call to wp_footer(), which is required by WP User Avatar. Please add this call to your page templates."); } else { error_log("We're sorry, but your theme's page template didn't make a call to wp_print_footer_scripts(), which is required by WP User Avatar. Please add this call to your page templates."); } // We don't want to manipulate the buffer if it doesn't contain HTML } elseif(strpos($this->buffer, '') === FALSE) { $this->valid_request = FALSE; } // The output_buffer() function has been called in the PHP shutdown callback // This will allow us to print the scripts ourselves and manipulate the buffer if($in_shutdown === TRUE) { ob_start(); if(!did_action('wp_footer')) { wp_footer(); } else { wp_print_footer_scripts(); } $this->other_output = ob_get_clean(); } // W3TC isn't activated and we're not in the shutdown callback. // We'll therefore add a shutdown callback to print the scripts else { $this->run_shutdown = TRUE; return ''; } } // Once we have the footer scripts, we can modify the buffer and // move the resources around if ($this->wrote_footer) $this->move_resources(); return $this->buffer; } /** * PHP shutdown callback. Manipulate and output the buffer * @since 1.9.5 */ function shutdown() { if($this->run_shutdown) echo $this->output_buffer(TRUE); } /** * @since 1.9.5 */ static function init() { $klass = get_class(); return self::$instance = new $klass; } }