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Avoid losing widgets when switching themes - take one, props aaroncampbell, see #17979

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git-svn-id: https://develop.svn.wordpress.org/trunk@18630 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Andrew Ozz
2011-09-02 22:13:55 +00:00
parent 46773a16ea
commit 4782c3dc6f
4 changed files with 140 additions and 97 deletions
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wp-includes/widgets.php
+101 -24
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@@ -547,6 +547,7 @@ function register_sidebar($args = array()) {
'name' => sprintf(__('Sidebar %d'), $i ),
'id' => "sidebar-$i",
'description' => '',
'class' => '',
'before_widget' => '<li id="%1$s" class="widget %2$s">',
'after_widget' => "</li>\n",
'before_title' => '<h2 class="widgettitle">',
@@ -1055,30 +1056,7 @@ function wp_get_sidebars_widgets($deprecated = true) {
unset($_sidebars_widgets);
case 2 :
$sidebars = array_keys( $wp_registered_sidebars );
if ( !empty( $sidebars ) ) {
// Move the known-good ones first
foreach ( (array) $sidebars as $id ) {
if ( array_key_exists( $id, $sidebars_widgets ) ) {
$_sidebars_widgets[$id] = $sidebars_widgets[$id];
unset($sidebars_widgets[$id], $sidebars[$id]);
}
}
// move the rest to wp_inactive_widgets
if ( !isset($_sidebars_widgets['wp_inactive_widgets']) )
$_sidebars_widgets['wp_inactive_widgets'] = array();
if ( !empty($sidebars_widgets) ) {
foreach ( $sidebars_widgets as $lost => $val ) {
if ( is_array($val) )
$_sidebars_widgets['wp_inactive_widgets'] = array_merge( (array) $_sidebars_widgets['wp_inactive_widgets'], $val );
}
}
$sidebars_widgets = $_sidebars_widgets;
unset($_sidebars_widgets);
}
$sidebars_widgets = retrieve_widgets();
}
}
@@ -1215,3 +1193,102 @@ function the_widget($widget, $instance = array(), $args = array()) {
function _get_widget_id_base($id) {
return preg_replace( '/-[0-9]+$/', '', $id );
}
function check_theme_switched() {
if ( false !== ( $old_theme = get_option( 'theme_switched' ) ) && !empty( $old_theme ) ) {
global $sidebars_widgets;
if ( ! is_array( $sidebars_widgets ) )
$sidebars_widgets = wp_get_sidebars_widgets();
$key = md5( $old_theme );
// Store widgets for 1 week so we can restore if needed
set_transient( 'old_widgets_' . $key, $sidebars_widgets, 604800 );
retrieve_widgets();
update_option( 'theme_switched', false );
}
}
// look for "lost" widgets, this has to run at least on each theme change
function retrieve_widgets() {
global $wp_registered_widget_updates, $wp_registered_sidebars, $sidebars_widgets, $wp_registered_widgets;
$key = md5( get_current_theme() );
if ( false !== ( $_sidebars_widgets = get_transient( "old_widgets_{$key}" ) ) ) {
delete_transient( "old_widgets_{$key}" );
} else {
if ( ! is_array( $sidebars_widgets ) )
$sidebars_widgets = wp_get_sidebars_widgets();
$sidebars = array_keys($wp_registered_sidebars);
unset( $sidebars_widgets['array_version'] );
$old = array_keys($sidebars_widgets);
sort($old);
sort($sidebars);
if ( $old == $sidebars )
return;
$_sidebars_widgets = array(
'wp_inactive_widgets' => $sidebars_widgets['wp_inactive_widgets']
);
unset( $sidebars_widgets['wp_inactive_widgets'] );
foreach ( $wp_registered_sidebars as $id => $settings ) {
if ( ! empty( $sidebars_widgets ) )
$_sidebars_widgets[$id] = array_shift( $sidebars_widgets );
}
if ( !empty($sidebars_widgets) ) {
$orphaned = 0;
foreach ( $sidebars_widgets as $val ) {
if ( is_array($val) && ! empty( $val ) )
$_sidebars_widgets['orphaned_widgets_' . ++$orphaned] = $val;
}
}
}
// discard invalid, theme-specific widgets from sidebars
$shown_widgets = array();
foreach ( $_sidebars_widgets as $sidebar => $widgets ) {
if ( !is_array($widgets) )
continue;
$_widgets = array();
foreach ( $widgets as $widget ) {
if ( isset($wp_registered_widgets[$widget]) )
$_widgets[] = $widget;
}
$_sidebars_widgets[$sidebar] = $_widgets;
$shown_widgets = array_merge($shown_widgets, $_widgets);
}
$sidebars_widgets = $_sidebars_widgets;
unset($_sidebars_widgets, $_widgets);
// find hidden/lost multi-widget instances
$lost_widgets = array();
foreach ( $wp_registered_widgets as $key => $val ) {
if ( in_array($key, $shown_widgets, true) )
continue;
$number = preg_replace('/.+?-([0-9]+)$/', '$1', $key);
if ( 2 > (int) $number )
continue;
$lost_widgets[] = $key;
}
$sidebars_widgets['wp_inactive_widgets'] = array_merge($lost_widgets, (array) $sidebars_widgets['wp_inactive_widgets']);
wp_set_sidebars_widgets($sidebars_widgets);
return $sidebars_widgets;
}