WordPress/wp-admin/network/themes.php

<?php
/**
 * Multisite themes administration panel.
 *
 * @package WordPress
 * @subpackage Multisite
 * @since 3.1.0
 */

/** Load WordPress Administration Bootstrap */
require_once( './admin.php' );

if ( ! is_multisite() )
	wp_die( __( 'Multisite support is not enabled.' ) );

$menu_perms = get_site_option( 'menu_items', array() );

if ( empty( $menu_perms['themes'] ) && ! is_super_admin() )
	wp_die( __( 'Cheatin&#8217; uh?' ) );

if ( !current_user_can('manage_network_themes') )
	wp_die( __( 'You do not have sufficient permissions to manage network themes.' ) );

$wp_list_table = _get_list_table('WP_MS_Themes_List_Table');
$pagenum = $wp_list_table->get_pagenum();

$action = $wp_list_table->current_action();

$s = isset($_REQUEST['s']) ? $_REQUEST['s'] : '';

// Clean up request URI from temporary args for screen options/paging uri's to work as expected.
$temp_args = array( 'enabled', 'disabled', 'deleted', 'error' );
$_SERVER['REQUEST_URI'] = remove_query_arg( $temp_args, $_SERVER['REQUEST_URI'] );
$referer = remove_query_arg( $temp_args, wp_get_referer() );

if ( $action ) {
	$allowed_themes = get_site_option( 'allowedthemes' );	
	switch ( $action ) {
		case 'enable':
			check_admin_referer('enable-theme_' . $_GET['theme']);
			$allowed_themes[ $_GET['theme'] ] = true;
			update_site_option( 'allowedthemes', $allowed_themes );
			wp_redirect( add_query_arg( 'enabled', '1', $referer ) );
			exit;
			break;
		case 'disable':
			check_admin_referer('disable-theme_' . $_GET['theme']);
			unset( $allowed_themes[ $_GET['theme'] ] );
			update_site_option( 'allowedthemes', $allowed_themes );
			wp_redirect( add_query_arg( 'disabled', '1', $referer ) );
			exit;
			break;
		case 'enable-selected':
			check_admin_referer('bulk-themes');
			$themes = isset( $_POST['checked'] ) ? (array) $_POST['checked'] : array();
			if ( empty($themes) ) {
				wp_redirect( add_query_arg( 'error', 'none', $referer ) );
				exit;
			}
			foreach( (array) $themes as $theme )
				$allowed_themes[ $theme ] = true;
			update_site_option( 'allowedthemes', $allowed_themes );
			wp_redirect( add_query_arg( 'enabled', count( $themes ), $referer ) );
			exit;
			break;
		case 'disable-selected':
			check_admin_referer('bulk-themes');
			$themes = isset( $_POST['checked'] ) ? (array) $_POST['checked'] : array();
			if ( empty($themes) ) {
				wp_redirect( add_query_arg( 'error', 'none', $referer ) );
				exit;
			}
			foreach( (array) $themes as $theme )
				unset( $allowed_themes[ $theme ] );
			update_site_option( 'allowedthemes', $allowed_themes );
			wp_redirect( add_query_arg( 'disabled', count( $themes ), $referer ) );
			exit;
			break;
		case 'delete-selected':
			if ( ! current_user_can( 'delete_themes' ) )
				wp_die( __('You do not have sufficient permissions to delete themes for this site.') );
			check_admin_referer( 'bulk-themes' );

			$themes = isset( $_REQUEST['checked'] ) ? (array) $_REQUEST['checked'] : array();

			if ( isset( $themes[ get_option( 'template' ) ] ) )
				unset( $themes[ get_option( 'template' ) ] );
			if ( isset( $themes[ get_option( 'stylesheet' ) ] ) )
				unset( $themes[ get_option( 'stylesheet' ) ] );

			if ( empty( $themes ) ) {
				wp_redirect( add_query_arg( 'error', 'none', $referer ) );
				exit;
			}

			$main_theme = get_current_theme();
			$files_to_delete = $theme_info = array();
			foreach ( $themes as $key => $theme ) {
				$data = get_theme_data( WP_CONTENT_DIR . '/themes/' . $theme . '/style.css' );
				if ( $data['Name'] == $main_theme ) {
					unset( $themes[$key] );
				} else {
					$files_to_delete = array_merge( $files_to_delete, list_files( WP_CONTENT_DIR . "/themes/$theme" ) );					
					$theme_info[ $theme ] = $data;
				}
			}
			
			if ( empty( $themes ) ) {
				wp_redirect( add_query_arg( 'error', 'main', $referer ) );
				exit;
			}

			include(ABSPATH . 'wp-admin/update.php');

			$parent_file = 'themes.php';

			if ( ! isset( $_REQUEST['verify-delete'] ) ) {
				wp_enqueue_script( 'jquery' );
				require_once( ABSPATH . 'wp-admin/admin-header.php' );
				?>
			<div class="wrap">
				<?php
					$themes_to_delete = count( $themes );
					screen_icon();
					echo '<h2>' . _n( 'Delete Theme', 'Delete Themes', $themes_to_delete ) . '</h2>';
				?>
				<div class="error"><p><strong><?php _e( 'Caution:' ); ?></strong> <?php echo _n( 'This theme may be active on other sites in the network.', 'These themes may be active on other sites in the network.', $themes_to_delete ); ?></p></div>
				<p><?php echo _n( 'You are about to remove the following theme:', 'You are about to remove the following themes:', $themes_to_delete ); ?></p>
					<ul class="ul-disc">
						<?php foreach ( $theme_info as $theme )
							echo '<li>', sprintf( __('<strong>%1$s</strong> by <em>%2$s</em>' ), esc_html( $theme['Name'] ), esc_html( $theme['AuthorName'] ) ), '</li>'; /* translators: 1: theme name, 2: theme author */ ?>
					</ul>
				<p><?php _e('Are you sure you wish to delete these themes?'); ?></p>
				<form method="post" action="<?php echo esc_url($_SERVER['REQUEST_URI']); ?>" style="display:inline;">
					<input type="hidden" name="verify-delete" value="1" />
					<input type="hidden" name="action" value="delete-selected" />
					<?php
						foreach ( (array) $themes as $theme )
							echo '<input type="hidden" name="checked[]" value="' . esc_attr($theme) . '" />';
					?>
					<?php wp_nonce_field('bulk-themes') ?>
					<?php submit_button( _n( 'Yes, Delete this theme', 'Yes, Delete these themes', $themes_to_delete ), 'button', 'submit', false ); ?>
				</form>
				<form method="post" action="<?php echo esc_url(wp_get_referer()); ?>" style="display:inline;">
					<?php submit_button( __( 'No, Return me to the theme list' ), 'button', 'submit', false ); ?>
				</form>

				<p><a href="#" onclick="jQuery('#files-list').toggle(); return false;"><?php _e('Click to view entire list of files which will be deleted'); ?></a></p>
				<div id="files-list" style="display:none;">
					<ul class="code">
					<?php
						foreach ( (array) $files_to_delete as $file )
							echo '<li>' . esc_html( str_replace( WP_CONTENT_DIR . "/themes", '', $file) ) . '</li>';
					?>
					</ul>
				</div>
			</div>
				<?php
				require_once(ABSPATH . 'wp-admin/admin-footer.php');
				exit;
			} // Endif verify-delete

			foreach ( $themes as $theme )
				$delete_result = delete_theme( $theme, esc_url( add_query_arg( array('verify-delete' => 1), $_SERVER['REQUEST_URI'] ) ) );
			$paged = ( $_REQUEST['paged'] ) ? $_REQUEST['paged'] : 1; 
			wp_redirect( network_admin_url( "themes.php?deleted=".count( $themes )."&paged=$paged&s=$s" ) );
			exit;
			break;
	}
}

$wp_list_table->prepare_items();

$total_pages = $wp_list_table->get_pagination_arg( 'total_pages' );
if ( $pagenum > $total_pages && $total_pages > 0 ) {
	wp_redirect( add_query_arg( 'paged', $total_pages ) );
	exit;
}

add_thickbox();

add_screen_option( 'per_page', array('label' => _x( 'Themes', 'themes per page (screen options)' )) );

add_contextual_help($current_screen,
	'<p>' . __('This screen enables and disables the inclusion of themes available to choose in the Appearance menu for each site. It does not activate or deactivate which theme a site is currently using.') . '</p>' .
	'<p>' . __('If the network admin disables a theme that is in use, it can still remain selected on that site. If another theme is chosen, the disabled theme will not appear in the site&#8217;s Appearance > Themes screen.') . '</p>' .
	'<p>' . __('Themes can be enabled on a site by site basis by the network admin on the Edit Site screen you go to via the Edit action link on the Sites screen. Only network admins are able to install or edit themes.') . '</p>' .
	'<p><strong>' . __('For more information:') . '</strong></p>' .
	'<p>' . __('<a href="http://codex.wordpress.org/Network_Admin_Themes_Screen" target="_blank">Documentation on Network Themes</a>') . '</p>' .
	'<p>' . __('<a href="http://wordpress.org/support/" target="_blank">Support Forums</a>') . '</p>'
);

$title = __('Themes');
$parent_file = 'themes.php';

require_once(ABSPATH . 'wp-admin/admin-header.php');

?>

<div class="wrap">
<?php screen_icon('themes'); ?>
<h2><?php echo esc_html( $title ); if ( current_user_can('install_themes') ) { ?> <a href="theme-install.php" class="button add-new-h2"><?php echo esc_html_x('Add New', 'theme'); ?></a><?php }
if ( $s ) 
	printf( '<span class="subtitle">' . __('Search results for &#8220;%s&#8221;') . '</span>', esc_html( $s ) ); ?> 
</h2>

<?php
if ( isset( $_GET['enabled'] ) ) {
	$_GET['enabled'] = absint( $_GET['enabled'] );
	echo '<div id="message" class="updated"><p>' . sprintf( _n( 'Theme enabled.', '%s themes enabled.', $_GET['enabled'] ), number_format_i18n( $_GET['enabled'] ) ) . '</p></div>';
} elseif ( isset( $_GET['disabled'] ) ) {
	$_GET['disabled'] = absint( $_GET['disabled'] );
	echo '<div id="message" class="updated"><p>' . sprintf( _n( 'Theme disabled.', '%s themes disabled.', $_GET['disabled'] ), number_format_i18n( $_GET['disabled'] ) ) . '</p></div>';
} elseif ( isset( $_GET['deleted'] ) ) {
	$_GET['deleted'] = absint( $_GET['deleted'] );
	echo '<div id="message" class="updated"><p>' . sprintf( _nx( 'Theme deleted.', '%s themes deleted.', $_GET['deleted'], 'network' ), number_format_i18n( $_GET['deleted'] ) ) . '</p></div>';
} elseif ( isset( $_GET['error'] ) && 'none' == $_GET['error'] ) {
	echo '<div id="message" class="error"><p>' . __( 'No theme selected.' ) . '</p></div>';
} elseif ( isset( $_GET['error'] ) && 'main' == $_GET['error'] ) {
	echo '<div class="error"><p>' . __( 'You cannot delete a theme while it is active on the main site.' ) . '</p></div>';
}

?>

<form method="get" action="">
<?php $wp_list_table->search_box( __( 'Search Installed Themes' ), 'theme' ); ?>
</form>

<?php $wp_list_table->views(); ?>

<form method="post" action="">
<input type="hidden" name="theme_status" value="<?php echo esc_attr($status) ?>" />
<input type="hidden" name="paged" value="<?php echo esc_attr($page) ?>" />

<?php $wp_list_table->display(); ?>
</form>

</div>

<?php
include(ABSPATH . 'wp-admin/admin-footer.php');