diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-admin/includes/class-theme-installer-skin.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-admin/includes/class-theme-installer-skin.php	Mon Oct 14 17:39:30 2019 +0200
@@ -0,0 +1,103 @@
+<?php
+/**
+ * Upgrader API: Theme_Installer_Skin class
+ *
+ * @package WordPress
+ * @subpackage Upgrader
+ * @since 4.6.0
+ */
+
+/**
+ * Theme Installer Skin for the WordPress Theme Installer.
+ *
+ * @since 2.8.0
+ * @since 4.6.0 Moved to its own file from wp-admin/includes/class-wp-upgrader-skins.php.
+ *
+ * @see WP_Upgrader_Skin
+ */
+class Theme_Installer_Skin extends WP_Upgrader_Skin {
+	public $api;
+	public $type;
+
+	/**
+	 *
+	 * @param array $args
+	 */
+	public function __construct($args = array()) {
+		$defaults = array( 'type' => 'web', 'url' => '', 'theme' => '', 'nonce' => '', 'title' => '' );
+		$args = wp_parse_args($args, $defaults);
+
+		$this->type = $args['type'];
+		$this->api = isset($args['api']) ? $args['api'] : array();
+
+		parent::__construct($args);
+	}
+
+	/**
+	 */
+	public function before() {
+		if ( !empty($this->api) )
+			$this->upgrader->strings['process_success'] = sprintf( $this->upgrader->strings['process_success_specific'], $this->api->name, $this->api->version);
+	}
+
+	/**
+	 */
+	public function after() {
+		if ( empty($this->upgrader->result['destination_name']) )
+			return;
+
+		$theme_info = $this->upgrader->theme_info();
+		if ( empty( $theme_info ) )
+			return;
+
+		$name       = $theme_info->display('Name');
+		$stylesheet = $this->upgrader->result['destination_name'];
+		$template   = $theme_info->get_template();
+
+		$activate_link = add_query_arg( array(
+			'action'     => 'activate',
+			'template'   => urlencode( $template ),
+			'stylesheet' => urlencode( $stylesheet ),
+		), admin_url('themes.php') );
+		$activate_link = wp_nonce_url( $activate_link, 'switch-theme_' . $stylesheet );
+
+		$install_actions = array();
+
+		if ( current_user_can( 'edit_theme_options' ) && current_user_can( 'customize' ) ) {
+			$customize_url = add_query_arg(
+				array(
+					'theme' => urlencode( $stylesheet ),
+					'return' => urlencode( admin_url( 'web' === $this->type ? 'theme-install.php' : 'themes.php' ) ),
+				),
+				admin_url( 'customize.php' )
+			);
+			$install_actions['preview'] = '<a href="' . esc_url( $customize_url ) . '" class="hide-if-no-customize load-customize"><span aria-hidden="true">' . __( 'Live Preview' ) . '</span><span class="screen-reader-text">' . sprintf( __( 'Live Preview &#8220;%s&#8221;' ), $name ) . '</span></a>';
+		}
+		$install_actions['activate'] = '<a href="' . esc_url( $activate_link ) . '" class="activatelink"><span aria-hidden="true">' . __( 'Activate' ) . '</span><span class="screen-reader-text">' . sprintf( __( 'Activate &#8220;%s&#8221;' ), $name ) . '</span></a>';
+
+		if ( is_network_admin() && current_user_can( 'manage_network_themes' ) )
+			$install_actions['network_enable'] = '<a href="' . esc_url( wp_nonce_url( 'themes.php?action=enable&amp;theme=' . urlencode( $stylesheet ), 'enable-theme_' . $stylesheet ) ) . '" target="_parent">' . __( 'Network Enable' ) . '</a>';
+
+		if ( $this->type == 'web' )
+			$install_actions['themes_page'] = '<a href="' . self_admin_url( 'theme-install.php' ) . '" target="_parent">' . __( 'Return to Theme Installer' ) . '</a>';
+		elseif ( current_user_can( 'switch_themes' ) || current_user_can( 'edit_theme_options' ) )
+			$install_actions['themes_page'] = '<a href="' . self_admin_url( 'themes.php' ) . '" target="_parent">' . __( 'Return to Themes page' ) . '</a>';
+
+		if ( ! $this->result || is_wp_error($this->result) || is_network_admin() || ! current_user_can( 'switch_themes' ) )
+			unset( $install_actions['activate'], $install_actions['preview'] );
+
+		/**
+		 * Filters the list of action links available following a single theme installation.
+		 *
+		 * @since 2.8.0
+		 *
+		 * @param array    $install_actions Array of theme action links.
+		 * @param object   $api             Object containing WordPress.org API theme data.
+		 * @param string   $stylesheet      Theme directory name.
+		 * @param WP_Theme $theme_info      Theme object.
+		 */
+		$install_actions = apply_filters( 'install_theme_complete_actions', $install_actions, $this->api, $stylesheet, $theme_info );
+		if ( ! empty($install_actions) )
+			$this->feedback(implode(' | ', (array)$install_actions));
+	}
+}