From c49f6bbb5af586a397a5691f690cce329f65aad8 Mon Sep 17 00:00:00 2001
From: Dion Hulse <dd32@git.wordpress.org>
Date: Wed, 20 Nov 2013 02:56:52 +0000
Subject: [PATCH] Themes: Add a get_theme_update_available() function to
 retrieve an update link and use it on the Themes page. See #26078

git-svn-id: https://develop.svn.wordpress.org/trunk@26282 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-admin/includes/theme.php | 39 ++++++++++++++++++++++++---------
 src/wp-admin/themes.php         |  1 +
 2 files changed, 30 insertions(+), 10 deletions(-)

diff --git a/src/wp-admin/includes/theme.php b/src/wp-admin/includes/theme.php
index 9415199a78..fa0707db7b 100644
--- a/src/wp-admin/includes/theme.php
+++ b/src/wp-admin/includes/theme.php
@@ -104,24 +104,40 @@ function _get_template_edit_filename($fullpath, $containingfolder) {
  * Will display link, if there is an update available.
  *
  * @since 2.7.0
+ * @see get_theme_update_available()
  *
  * @param object $theme Theme data object.
- * @return bool False if no valid info was passed.
  */
 function theme_update_available( $theme ) {
+	echo get_theme_update_available( $theme );
+}
+
+/**
+ * Retrieve the update link if there is an update for a theme available.
+ *
+ * Will return a link, if there is an update available.
+ *
+ * @since 3.8.0
+ *
+ * @param object $theme Theme data object.
+ * @return string|bool HTML for the update link, or False if no valid info was passed.
+ */
+function get_theme_update_available( $theme ) {
 	static $themes_update;
 
 	if ( !current_user_can('update_themes' ) )
-		return;
+		return false;
 
 	if ( !isset($themes_update) )
 		$themes_update = get_site_transient('update_themes');
 
 	if ( ! is_a( $theme, 'WP_Theme' ) )
-		return;
+		return false;
 
 	$stylesheet = $theme->get_stylesheet();
 
+	$html = '';
+
 	if ( isset($themes_update->response[ $stylesheet ]) ) {
 		$update = $themes_update->response[ $stylesheet ];
 		$theme_name = $theme->display('Name');
@@ -130,14 +146,17 @@ function theme_update_available( $theme ) {
 		$update_onclick = 'onclick="if ( confirm(\'' . esc_js( __("Updating this theme will lose any customizations you have made. 'Cancel' to stop, 'OK' to update.") ) . '\') ) {return true;}return false;"';
 
 		if ( !is_multisite() ) {
-			if ( ! current_user_can('update_themes') )
-				printf( '<p><strong>' . __('There is a new version of %1$s available. <a href="%2$s" class="thickbox" title="%1$s">View version %3$s details</a>.') . '</strong></p>', $theme_name, $details_url, $update['new_version']);
-			else if ( empty($update['package']) )
-				printf( '<p><strong>' . __('There is a new version of %1$s available. <a href="%2$s" class="thickbox" title="%1$s">View version %3$s details</a>. <em>Automatic update is unavailable for this theme.</em>') . '</strong></p>', $theme_name, $details_url, $update['new_version']);
-			else
-				printf( '<p><strong>' . __('There is a new version of %1$s available. <a href="%2$s" class="thickbox" title="%1$s">View version %3$s details</a> or <a href="%4$s" %5$s>update now</a>.') . '</strong></p>', $theme_name, $details_url, $update['new_version'], $update_url, $update_onclick );
+			if ( ! current_user_can('update_themes') ) {
+				$html = sprintf( '<p><strong>' . __('There is a new version of %1$s available. <a href="%2$s" class="thickbox" title="%1$s">View version %3$s details</a>.') . '</strong></p>', $theme_name, $details_url, $update['new_version']);
+			} else if ( empty( $update['package'] ) ) {
+				$html = sprintf( '<p><strong>' . __('There is a new version of %1$s available. <a href="%2$s" class="thickbox" title="%1$s">View version %3$s details</a>. <em>Automatic update is unavailable for this theme.</em>') . '</strong></p>', $theme_name, $details_url, $update['new_version']);
+			} else {
+				$html = sprintf( '<p><strong>' . __('There is a new version of %1$s available. <a href="%2$s" class="thickbox" title="%1$s">View version %3$s details</a> or <a href="%4$s" %5$s>update now</a>.') . '</strong></p>', $theme_name, $details_url, $update['new_version'], $update_url, $update_onclick );
+			}
 		}
 	}
+
+	return $html;
 }
 
 /**
@@ -393,7 +412,7 @@ function wp_prepare_themes_for_js( $themes = null ) {
 			'parent'       => $parent,
 			'active'       => $slug === $current_theme,
 			'hasUpdate'    => isset( $updates[ $slug ] ),
-			'update'       => 'New version available', // @todo complete this
+			'update'       => get_theme_update_available( $theme ),
 			'actions'      => array(
 				'activate' => wp_nonce_url( 'themes.php?action=activate&amp;stylesheet=' . $encoded_slug, 'switch-theme_' . $slug ),
 				'customize'=> admin_url( 'customize.php?theme=' . $encoded_slug ),
diff --git a/src/wp-admin/themes.php b/src/wp-admin/themes.php
index 41bd85ac1e..c4d16b975d 100644
--- a/src/wp-admin/themes.php
+++ b/src/wp-admin/themes.php
@@ -103,6 +103,7 @@ wp_localize_script( 'theme', '_wpThemeSettings', array(
 	),
 ) );
 
+add_thickbox();
 wp_enqueue_style( 'theme' );
 wp_enqueue_script( 'theme' );
 wp_enqueue_script( 'customize-loader' );