249 lines
6.4 KiB
PHP
249 lines
6.4 KiB
PHP
<?php
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/**
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* Move body CSS to head and JS to footer.
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* Borrowed from NextGEN Gallery C_Photocrati_Resource_Manager class.
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*
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* @package One User Avatar
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* @author Bangbay Siboliban
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* @author Flippercode
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* @author ProfilePress
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* @author One Designs
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* @copyright 2013-2014 Bangbay Siboliban
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* @copyright 2014-2020 Flippercode
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* @copyright 2020-2021 ProfilePress
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* @copyright 2021 One Designs
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* @version 2.3.9
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*/
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class WP_User_Avatar_Resource_Manager {
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static $instance = null;
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public $marker = '<!-- wp_user_avatar_resource_manager_marker -->';
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var $buffer = '';
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var $styles = '';
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var $other_output = '';
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var $wrote_footer = false;
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var $run_shutdown = false;
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var $valid_request = true;
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/**
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* Start buffering all generated output. We'll then do two things with the buffer
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* 1) Find stylesheets lately enqueued and move them to the header
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* 2) Ensure that wp_print_footer_scripts() is called
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* @since 1.9.5
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*/
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function __construct() {
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// Validate the request
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$this->validate_request();
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add_action( 'init', array( &$this, 'start_buffer' ), 1 );
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add_action( 'wp_footer', array( &$this, 'print_marker' ), -1 );
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}
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/**
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* Created early as possible in the wp_footer action this is the string to which we
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* will move JS resources after
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* @since 1.9.8
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*/
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function print_marker() {
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print $this->marker;
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}
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/**
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* Determines if the resource manager should perform its routines for this request
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* @since 1.9.5
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* @return bool
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*/
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function validate_request() {
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$retval = true;
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if ( is_admin() ) {
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if ( isset($_REQUEST['page'] ) && ! preg_match( "#^(wp_user_avatar)#", $_REQUEST['page'] ) ) {
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$retval = false;
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}
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}
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if ( false !== strpos( $_SERVER['REQUEST_URI'], 'wp-admin/update') ) {
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$retval = false;
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} elseif ( isset( $_GET['display_gallery_iframe'] ) ) {
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$retval = false;
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} elseif ( defined( 'WP_ADMIN' ) && WP_ADMIN && defined( 'DOING_AJAX' ) && DOING_AJAX ) {
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$retval = false;
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} elseif ( preg_match( "/(js|css|xsl|xml|kml)$/", $_SERVER['REQUEST_URI'] ) ) {
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$retval = false;
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} elseif ( preg_match( "/\\.(\\w{3,4})$/", $_SERVER['REQUEST_URI'], $match ) ) {
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if ( ! in_array( $match[1], array( 'htm', 'html', 'php' ) ) ) {
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$retval = false;
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}
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}
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$this->valid_request = $retval;
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}
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/**
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* Start the output buffers
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* @since 1.9.5
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*/
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function start_buffer() {
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if( defined( 'WPUA_DISABLE_RESOURCE_MANAGER' ) && WPUA_DISABLE_RESOURCE_MANAGER ) {
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return;
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}
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if ( apply_filters('run_wpua_resource_manager', $this->valid_request ) ) {
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ob_start( array( &$this, 'output_buffer_handler' ) );
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ob_start( array( &$this, 'get_buffer' ) );
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add_action( 'wp_print_footer_scripts', array( &$this, 'get_resources'), 1 );
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add_action( 'admin_print_footer_scripts', array( &$this, 'get_resources'), 1 );
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add_action( 'shutdown', array( &$this, 'shutdown' ) );
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}
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}
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/**
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* @since 1.9.5
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*/
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function get_resources() {
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ob_start();
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wp_print_styles();
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print_admin_styles();
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$this->styles = ob_get_clean();
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if ( ! is_admin() ) {
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ob_start();
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wp_print_scripts();
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$this->scripts = ob_get_clean();
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}
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$this->wrote_footer = true;
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}
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/**
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* Output the buffer after PHP execution has ended (but before shutdown)
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* @since 1.9.5
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* @param string $content
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* @return string
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*/
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function output_buffer_handler($content) {
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return $this->output_buffer();
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}
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/**
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* Removes the closing </html> tag from the output buffer. We'll then write our own closing tag
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* in the shutdown function after running wp_print_footer_scripts()
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* @since 1.9.5
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* @param string $content
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* @return mixed
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*/
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function get_buffer($content) {
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$this->buffer = $content;
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return '';
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}
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/**
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* Moves resources to their appropriate place
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* @since 1.9.5
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*/
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function move_resources() {
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if ( $this->valid_request ) {
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// Move stylesheets to head
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if ( $this->styles ) {
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$this->buffer = str_ireplace( '</head>', $this->styles . '</head>', $this->buffer );
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}
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// Move the scripts to the bottom of the page
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if ( $this->scripts ) {
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$this->buffer = str_ireplace( $this->marker, $this->marker.$this->scripts, $this->buffer );
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}
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if( $this->other_output ) {
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$this->buffer = str_replace( $this->marker, $this->marker.$this->other_output, $this->buffer );
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}
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}
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}
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/**
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* When PHP has finished, we output the footer scripts and closing tags
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* @since 1.9.5
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*/
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function output_buffer( $in_shutdown = false ) {
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// If the footer scripts haven't been outputted, then
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// we need to take action - as they're required
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if ( ! $this->wrote_footer ) {
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// If W3TC is installed and activated, we can't output the
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// scripts and manipulate the buffer, so we can only provide a warning
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if ( defined( 'W3TC' ) && defined( 'WP_DEBUG' ) && WP_DEBUG && ! is_admin() ) {
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if ( ! defined( 'DONOTCACHEPAGE' ) ) {
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define( 'DONOTCACHEPAGE', true );
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}
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error_log( sprintf(
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/* translators: either wp_footer() or wp_print_footer_scripts() hook. */
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__( "We're sorry, but your theme's page template didn't make a call to %s, which is required by One User Avatar. Please add this call to your page templates.", 'one-user-avatar' ),
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( did_action( 'wp_footer' ) ? 'wp_print_footer_scripts()' : 'wp_footer()' )
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) );
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// We don't want to manipulate the buffer if it doesn't contain HTML
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} elseif ( false === strpos( $this->buffer, '</body>' ) ) {
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$this->valid_request = false;
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}
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// The output_buffer() function has been called in the PHP shutdown callback
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// This will allow us to print the scripts ourselves and manipulate the buffer
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if ( true === $in_shutdown ) {
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ob_start();
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if ( ! did_action( 'wp_footer' ) ) {
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wp_footer();
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} else {
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wp_print_footer_scripts();
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}
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$this->other_output = ob_get_clean();
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}
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// W3TC isn't activated and we're not in the shutdown callback.
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// We'll therefore add a shutdown callback to print the scripts
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else {
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$this->run_shutdown = true;
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return '';
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}
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}
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// Once we have the footer scripts, we can modify the buffer and
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// move the resources around
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if ( $this->wrote_footer ) {
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$this->move_resources();
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}
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return $this->buffer;
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}
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/**
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* PHP shutdown callback. Manipulate and output the buffer
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* @since 1.9.5
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*/
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function shutdown() {
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if ( $this->run_shutdown ) {
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echo $this->output_buffer( true );
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}
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}
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/**
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* @since 1.9.5
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*/
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static function init() {
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$klass = get_class();
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return self::$instance = new $klass;
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}
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}
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