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Avoid losing widgets when switching themes - take one, props aaroncampbell, see #17979
git-svn-id: http://svn.automattic.com/wordpress/trunk@18630 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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azaozz
parent
1fd69ecf36
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4852c5887f
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@ -44,10 +44,17 @@ $help .= '<p>' . __('<a href="http://codex.wordpress.org/Appearance_Widgets_Scre
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$help .= '<p>' . __('<a href="http://wordpress.org/support/" target="_blank">Support Forums</a>') . '</p>';
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add_contextual_help($current_screen, $help);
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// These are the widgets grouped by sidebar
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$sidebars_widgets = wp_get_sidebars_widgets();
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if ( empty( $sidebars_widgets ) )
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$sidebars_widgets = wp_get_widget_defaults();
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// register the inactive_widgets area as sidebar
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register_sidebar(array(
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'name' => __('Inactive Widgets'),
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'id' => 'wp_inactive_widgets',
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'class' => 'inactive',
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'description' => '',
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'before_widget' => '',
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'after_widget' => '',
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@ -55,78 +62,22 @@ register_sidebar(array(
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'after_title' => '',
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));
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// These are the widgets grouped by sidebar
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$sidebars_widgets = wp_get_sidebars_widgets();
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if ( empty( $sidebars_widgets ) )
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$sidebars_widgets = wp_get_widget_defaults();
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// look for "lost" widgets, this has to run at least on each theme change
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function retrieve_widgets() {
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global $wp_registered_widget_updates, $wp_registered_sidebars, $sidebars_widgets, $wp_registered_widgets;
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$_sidebars_widgets = array();
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$sidebars = array_keys($wp_registered_sidebars);
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unset( $sidebars_widgets['array_version'] );
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$old = array_keys($sidebars_widgets);
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sort($old);
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sort($sidebars);
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if ( $old == $sidebars )
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return;
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// Move the known-good ones first
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foreach ( $sidebars as $id ) {
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if ( array_key_exists( $id, $sidebars_widgets ) ) {
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$_sidebars_widgets[$id] = $sidebars_widgets[$id];
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unset($sidebars_widgets[$id], $sidebars[$id]);
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}
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foreach ( $sidebars_widgets as $sidebar_id => $widgets ) {
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if ( empty( $wp_registered_sidebars[ $sidebar_id ] ) && ! empty( $widgets ) ) {
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// register the inactive_widgets area as sidebar
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register_sidebar(array(
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'name' => __( 'Inactive Widgets (Previous Theme)' ),
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'id' => $sidebar_id,
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'class' => 'orphaned',
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'description' => __( 'This is a left over sidebar from an old theme and does not show anywhere on your site' ),
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'before_widget' => '',
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'after_widget' => '',
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'before_title' => '',
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'after_title' => '',
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));
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}
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// if new theme has less sidebars than the old theme
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if ( !empty($sidebars_widgets) ) {
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foreach ( $sidebars_widgets as $lost => $val ) {
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if ( is_array($val) )
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$_sidebars_widgets['wp_inactive_widgets'] = array_merge( (array) $_sidebars_widgets['wp_inactive_widgets'], $val );
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}
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}
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// discard invalid, theme-specific widgets from sidebars
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$shown_widgets = array();
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foreach ( $_sidebars_widgets as $sidebar => $widgets ) {
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if ( !is_array($widgets) )
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continue;
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$_widgets = array();
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foreach ( $widgets as $widget ) {
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if ( isset($wp_registered_widgets[$widget]) )
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$_widgets[] = $widget;
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}
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$_sidebars_widgets[$sidebar] = $_widgets;
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$shown_widgets = array_merge($shown_widgets, $_widgets);
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}
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$sidebars_widgets = $_sidebars_widgets;
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unset($_sidebars_widgets, $_widgets);
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// find hidden/lost multi-widget instances
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$lost_widgets = array();
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foreach ( $wp_registered_widgets as $key => $val ) {
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if ( in_array($key, $shown_widgets, true) )
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continue;
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$number = preg_replace('/.+?-([0-9]+)$/', '$1', $key);
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if ( 2 > (int) $number )
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continue;
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$lost_widgets[] = $key;
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}
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$sidebars_widgets['wp_inactive_widgets'] = array_merge($lost_widgets, (array) $sidebars_widgets['wp_inactive_widgets']);
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wp_set_sidebars_widgets($sidebars_widgets);
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}
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retrieve_widgets();
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if ( count($wp_registered_sidebars) == 1 ) {
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@ -387,8 +338,15 @@ $i = 0;
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foreach ( $wp_registered_sidebars as $sidebar => $registered_sidebar ) {
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if ( 'wp_inactive_widgets' == $sidebar )
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continue;
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$closed = $i ? ' closed' : ''; ?>
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<div class="widgets-holder-wrap<?php echo $closed; ?>">
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$wrap_class = 'widgets-holder-wrap';
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if ( !empty( $registered_sidebar['class'] ) )
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$wrap_class .= ' sidebar-' . $registered_sidebar['class'];
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if ( $i )
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$wrap_class .= ' closed'; ?>
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<div class="<?php esc_attr_e( $wrap_class ); ?>">
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<div class="sidebar-name">
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<div class="sidebar-name-arrow"><br /></div>
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<h3><?php echo esc_html( $registered_sidebar['name'] ); ?>
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@ -218,6 +218,7 @@ add_action( 'wp_footer', 'wp_print_footer_scripts', 20 );
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add_action( 'wp_head', 'wp_shortlink_wp_head', 10, 0 );
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add_action( 'template_redirect', 'wp_shortlink_header', 11, 0 );
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add_action( 'wp_print_footer_scripts', '_wp_footer_scripts' );
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add_action( 'init', 'check_theme_switched', 99 );
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if ( isset( $_GET['replytocom'] ) )
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add_filter( 'pre_option_blog_public', '__return_zero' );
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@ -1248,19 +1248,26 @@ function preview_theme_ob_filter_callback( $matches ) {
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function switch_theme($template, $stylesheet) {
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global $wp_theme_directories;
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$old_theme = get_current_theme();
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update_option('template', $template);
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update_option('stylesheet', $stylesheet);
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if ( count($wp_theme_directories) > 1 ) {
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update_option('template_root', get_raw_theme_root($template, true));
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update_option('stylesheet_root', get_raw_theme_root($stylesheet, true));
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}
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delete_option('current_theme');
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$theme = get_current_theme();
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if ( is_admin() && false === get_option( "theme_mods_$stylesheet" ) ) {
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$default_theme_mods = (array) get_option( "mods_$theme" );
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add_option( "theme_mods_$stylesheet", $default_theme_mods );
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}
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do_action('switch_theme', $theme);
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update_option( 'theme_switched', $old_theme );
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do_action( 'switch_theme', $theme );
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}
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/**
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@ -547,6 +547,7 @@ function register_sidebar($args = array()) {
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'name' => sprintf(__('Sidebar %d'), $i ),
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'id' => "sidebar-$i",
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'description' => '',
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'class' => '',
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'before_widget' => '<li id="%1$s" class="widget %2$s">',
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'after_widget' => "</li>\n",
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'before_title' => '<h2 class="widgettitle">',
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@ -1055,30 +1056,7 @@ function wp_get_sidebars_widgets($deprecated = true) {
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unset($_sidebars_widgets);
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case 2 :
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$sidebars = array_keys( $wp_registered_sidebars );
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if ( !empty( $sidebars ) ) {
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// Move the known-good ones first
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foreach ( (array) $sidebars as $id ) {
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if ( array_key_exists( $id, $sidebars_widgets ) ) {
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$_sidebars_widgets[$id] = $sidebars_widgets[$id];
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unset($sidebars_widgets[$id], $sidebars[$id]);
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}
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}
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// move the rest to wp_inactive_widgets
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if ( !isset($_sidebars_widgets['wp_inactive_widgets']) )
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$_sidebars_widgets['wp_inactive_widgets'] = array();
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if ( !empty($sidebars_widgets) ) {
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foreach ( $sidebars_widgets as $lost => $val ) {
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if ( is_array($val) )
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$_sidebars_widgets['wp_inactive_widgets'] = array_merge( (array) $_sidebars_widgets['wp_inactive_widgets'], $val );
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}
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}
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$sidebars_widgets = $_sidebars_widgets;
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unset($_sidebars_widgets);
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}
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$sidebars_widgets = retrieve_widgets();
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}
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}
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@ -1215,3 +1193,102 @@ function the_widget($widget, $instance = array(), $args = array()) {
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function _get_widget_id_base($id) {
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return preg_replace( '/-[0-9]+$/', '', $id );
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}
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function check_theme_switched() {
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if ( false !== ( $old_theme = get_option( 'theme_switched' ) ) && !empty( $old_theme ) ) {
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global $sidebars_widgets;
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if ( ! is_array( $sidebars_widgets ) )
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$sidebars_widgets = wp_get_sidebars_widgets();
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$key = md5( $old_theme );
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// Store widgets for 1 week so we can restore if needed
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set_transient( 'old_widgets_' . $key, $sidebars_widgets, 604800 );
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retrieve_widgets();
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update_option( 'theme_switched', false );
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}
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}
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// look for "lost" widgets, this has to run at least on each theme change
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function retrieve_widgets() {
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global $wp_registered_widget_updates, $wp_registered_sidebars, $sidebars_widgets, $wp_registered_widgets;
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$key = md5( get_current_theme() );
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if ( false !== ( $_sidebars_widgets = get_transient( "old_widgets_{$key}" ) ) ) {
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delete_transient( "old_widgets_{$key}" );
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} else {
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if ( ! is_array( $sidebars_widgets ) )
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$sidebars_widgets = wp_get_sidebars_widgets();
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$sidebars = array_keys($wp_registered_sidebars);
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unset( $sidebars_widgets['array_version'] );
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$old = array_keys($sidebars_widgets);
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sort($old);
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sort($sidebars);
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if ( $old == $sidebars )
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return;
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$_sidebars_widgets = array(
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'wp_inactive_widgets' => $sidebars_widgets['wp_inactive_widgets']
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);
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unset( $sidebars_widgets['wp_inactive_widgets'] );
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foreach ( $wp_registered_sidebars as $id => $settings ) {
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if ( ! empty( $sidebars_widgets ) )
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$_sidebars_widgets[$id] = array_shift( $sidebars_widgets );
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}
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if ( !empty($sidebars_widgets) ) {
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$orphaned = 0;
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foreach ( $sidebars_widgets as $val ) {
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if ( is_array($val) && ! empty( $val ) )
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$_sidebars_widgets['orphaned_widgets_' . ++$orphaned] = $val;
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}
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}
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}
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// discard invalid, theme-specific widgets from sidebars
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$shown_widgets = array();
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foreach ( $_sidebars_widgets as $sidebar => $widgets ) {
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if ( !is_array($widgets) )
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continue;
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$_widgets = array();
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foreach ( $widgets as $widget ) {
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if ( isset($wp_registered_widgets[$widget]) )
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$_widgets[] = $widget;
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}
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$_sidebars_widgets[$sidebar] = $_widgets;
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$shown_widgets = array_merge($shown_widgets, $_widgets);
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}
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$sidebars_widgets = $_sidebars_widgets;
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unset($_sidebars_widgets, $_widgets);
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// find hidden/lost multi-widget instances
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$lost_widgets = array();
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foreach ( $wp_registered_widgets as $key => $val ) {
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if ( in_array($key, $shown_widgets, true) )
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continue;
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$number = preg_replace('/.+?-([0-9]+)$/', '$1', $key);
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if ( 2 > (int) $number )
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continue;
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$lost_widgets[] = $key;
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}
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$sidebars_widgets['wp_inactive_widgets'] = array_merge($lost_widgets, (array) $sidebars_widgets['wp_inactive_widgets']);
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wp_set_sidebars_widgets($sidebars_widgets);
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return $sidebars_widgets;
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}
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