+function get_theme_feature_list( $api = true ) {
+ // Hard-coded list is used if api not accessible.
+ $features = array(
+ __( 'Colors' ) => array(
+ 'black' => __( 'Black' ),
+ 'blue' => __( 'Blue' ),
+ 'brown' => __( 'Brown' ),
+ 'gray' => __( 'Gray' ),
+ 'green' => __( 'Green' ),
+ 'orange' => __( 'Orange' ),
+ 'pink' => __( 'Pink' ),
+ 'purple' => __( 'Purple' ),
+ 'red' => __( 'Red' ),
+ 'silver' => __( 'Silver' ),
+ 'tan' => __( 'Tan' ),
+ 'white' => __( 'White' ),
+ 'yellow' => __( 'Yellow' ),
+ 'dark' => __( 'Dark' ),
+ 'light' => __( 'Light' ),
+ ),
+
+ __( 'Columns' ) => array(
+ 'one-column' => __( 'One Column' ),
+ 'two-columns' => __( 'Two Columns' ),
+ 'three-columns' => __( 'Three Columns' ),
+ 'four-columns' => __( 'Four Columns' ),
+ 'left-sidebar' => __( 'Left Sidebar' ),
+ 'right-sidebar' => __( 'Right Sidebar' ),
+ ),
+
+ __( 'Layout' ) => array(
+ 'fixed-layout' => __( 'Fixed Layout' ),
+ 'fluid-layout' => __( 'Fluid Layout' ),
+ 'responsive-layout' => __( 'Responsive Layout' ),
+ ),
+
+ __( 'Features' ) => array(
+ 'accessibility-ready' => __( 'Accessibility Ready' ),
+ 'blavatar' => __( 'Blavatar' ),
+ 'buddypress' => __( 'BuddyPress' ),
+ 'custom-background' => __( 'Custom Background' ),
+ 'custom-colors' => __( 'Custom Colors' ),
+ 'custom-header' => __( 'Custom Header' ),
+ 'custom-menu' => __( 'Custom Menu' ),
+ 'editor-style' => __( 'Editor Style' ),
+ 'featured-image-header' => __( 'Featured Image Header' ),
+ 'featured-images' => __( 'Featured Images' ),
+ 'flexible-header' => __( 'Flexible Header' ),
+ 'front-page-post-form' => __( 'Front Page Posting' ),
+ 'full-width-template' => __( 'Full Width Template' ),
+ 'microformats' => __( 'Microformats' ),
+ 'post-formats' => __( 'Post Formats' ),
+ 'rtl-language-support' => __( 'RTL Language Support' ),
+ 'sticky-post' => __( 'Sticky Post' ),
+ 'theme-options' => __( 'Theme Options' ),
+ 'threaded-comments' => __( 'Threaded Comments' ),
+ 'translation-ready' => __( 'Translation Ready' ),
+ ),
+
+ __( 'Subject' ) => array(
+ 'holiday' => __( 'Holiday' ),
+ 'photoblogging' => __( 'Photoblogging' ),
+ 'seasonal' => __( 'Seasonal' ),
+ )
+ );
+
+ if ( ! $api || ! current_user_can( 'install_themes' ) )
+ return $features;
+
+ if ( !$feature_list = get_site_transient( 'wporg_theme_feature_list' ) )
+ set_site_transient( 'wporg_theme_feature_list', array(), 10800);
+
+ if ( !$feature_list ) {
+ $feature_list = themes_api( 'feature_list', array() );
+ if ( is_wp_error( $feature_list ) )
+ return $features;
+ }
+
+ if ( !$feature_list )
+ return $features;
+
+ set_site_transient( 'wporg_theme_feature_list', $feature_list, 10800 );
+
+ $category_translations = array(
+ 'Colors' => __( 'Colors' ),
+ 'Columns' => __( 'Columns' ),
+ 'Layout' => __( 'Layout' ),
+ 'Features' => __( 'Features' ),
+ 'Subject' => __( 'Subject' )
+ );
+
+ // Loop over the wporg canonical list and apply translations
+ $wporg_features = array();
+ foreach ( (array) $feature_list as $feature_category => $feature_items ) {
+ if ( isset($category_translations[$feature_category]) )
+ $feature_category = $category_translations[$feature_category];
+ $wporg_features[$feature_category] = array();
+
+ foreach ( $feature_items as $feature ) {
+ if ( isset($features[$feature_category][$feature]) )
+ $wporg_features[$feature_category][$feature] = $features[$feature_category][$feature];
+ else
+ $wporg_features[$feature_category][$feature] = $feature;
+ }
+ }
+
+ return $wporg_features;
+}
+
+/**
+ * Retrieve theme installer pages from WordPress Themes API.
+ *
+ * It is possible for a theme to override the Themes API result with three
+ * filters. Assume this is for themes, which can extend on the Theme Info to
+ * offer more choices. This is very powerful and must be used with care, when
+ * overridding the filters.
+ *
+ * The first filter, 'themes_api_args', is for the args and gives the action as
+ * the second parameter. The hook for 'themes_api_args' must ensure that an
+ * object is returned.
+ *
+ * The second filter, 'themes_api', is the result that would be returned.
+ *
+ * @since 2.8.0
+ *
+ * @param string $action The requested action. Likely values are 'theme_information',
+ * 'feature_list', or 'query_themes'.
+ * @param array|object $args Optional. Arguments to serialize for the Theme Info API.
+ * @return mixed
+ */
+function themes_api( $action, $args = null ) {
+
+ if ( is_array($args) )
+ $args = (object)$args;
+
+ if ( !isset($args->per_page) )
+ $args->per_page = 24;
+ /**
+ * Filter arguments used to query for installer pages from the WordPress.org Themes API.
+ *
+ * Important: An object MUST be returned to this filter.
+ *
+ * @since 2.8.0
+ *
+ * @param object $args Arguments used to query for installer pages from the WordPress.org Themes API.
+ * @param string $action Requested action. Likely values are 'theme_information',
+ * 'feature_list', or 'query_themes'.
+ */
+ $args = apply_filters( 'themes_api_args', $args, $action );
+
+ /**
+ * Filter whether to override the WordPress.org Themes API.
+ *
+ * Returning a value of true to this filter allows a theme to completely
+ * override the built-in WordPress.org API.
+ *
+ * @since 2.8.0
+ *
+ * @param bool $bool Whether to override the WordPress.org Themes API. Default false.
+ * @param string $action Requested action. Likely values are 'theme_information',
+ * 'feature_list', or 'query_themes'.
+ * @param object $args Arguments used to query for installer pages from the Themes API.
+ */
+ $res = apply_filters( 'themes_api', false, $action, $args );
+
+ if ( ! $res ) {
+ $url = $http_url = 'http://api.wordpress.org/themes/info/1.0/';
+ if ( $ssl = wp_http_supports( array( 'ssl' ) ) )
+ $url = set_url_scheme( $url, 'https' );
+
+ $args = array(
+ 'body' => array(
+ 'action' => $action,
+ 'request' => serialize( $args )
+ )
+ );
+ $request = wp_remote_post( $url, $args );
+
+ if ( $ssl && is_wp_error( $request ) ) {
+ trigger_error( __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the <a href="http://wordpress.org/support/">support forums</a>.' ) . ' ' . '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)', headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE );
+ $request = wp_remote_post( $http_url, $args );
+ }
+
+ if ( is_wp_error($request) ) {
+ $res = new WP_Error('themes_api_failed', __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the <a href="http://wordpress.org/support/">support forums</a>.' ), $request->get_error_message() );
+ } else {
+ $res = maybe_unserialize( wp_remote_retrieve_body( $request ) );
+ if ( ! is_object( $res ) && ! is_array( $res ) )
+ $res = new WP_Error('themes_api_failed', __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the <a href="http://wordpress.org/support/">support forums</a>.' ), wp_remote_retrieve_body( $request ) );
+ }
+ }
+
+ /**
+ * Filter the returned WordPress.org Themes API response.
+ *
+ * @since 2.8.0
+ *
+ * @param array|object $res WordPress.org Themes API response.
+ * @param string $action Requested action. Likely values are 'theme_information',
+ * 'feature_list', or 'query_themes'.
+ * @param object $args Arguments used to query for installer pages from the WordPress.org Themes API.
+ */
+ return apply_filters( 'themes_api_result', $res, $action, $args );