From 9e33ac1beecc68230e357bde161dea1d05f5f1a4 Mon Sep 17 00:00:00 2001
From: Andrew Nacin <wp@andrewnacin.com>
Date: Fri, 18 Jul 2014 20:50:15 +0000
Subject: [PATCH] Plugin Install screens: Pass locale and installed plugins to
 the API, for context.

props tellyworth.
see #17902.

Built from https://develop.svn.wordpress.org/trunk@29227


git-svn-id: http://core.svn.wordpress.org/trunk@29011 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 .../class-wp-plugin-install-list-table.php    | 37 ++++++++++++++++++-
 1 file changed, 36 insertions(+), 1 deletion(-)

diff --git a/wp-admin/includes/class-wp-plugin-install-list-table.php b/wp-admin/includes/class-wp-plugin-install-list-table.php
index 804da69e64..b0887f5c33 100644
--- a/wp-admin/includes/class-wp-plugin-install-list-table.php
+++ b/wp-admin/includes/class-wp-plugin-install-list-table.php
@@ -17,6 +17,34 @@ class WP_Plugin_Install_List_Table extends WP_List_Table {
 		return current_user_can('install_plugins');
 	}
 
+	/**
+	 * Return a list of slugs of installed plugins, if known.
+	 *
+	 * Uses the transient data from the updates API to determine the slugs of
+	 * known installed plugins. This might be better elsewhere, perhaps even
+	 * within get_plugins().
+	 *
+	 * @since 4.0.0
+	 */
+	protected function get_installed_plugin_slugs() {
+		$slugs = array();
+
+		$plugin_info = get_site_transient( 'update_plugins' );
+		if ( isset( $plugin_info->no_update ) ) {
+			foreach ( $plugin_info->no_update as $plugin ) {
+				$slugs[] = $plugin->slug;
+			}
+		}
+
+		if ( isset( $plugin_info->response ) ) {
+			foreach ( $plugin_info->response as $plugin ) {
+				$slugs[] = $plugin->slug;
+			}
+		}
+
+		return $slugs;
+	}
+
 	public function prepare_items() {
 		include( ABSPATH . 'wp-admin/includes/plugin-install.php' );
 
@@ -66,7 +94,14 @@ class WP_Plugin_Install_List_Table extends WP_List_Table {
 		if ( empty( $tab ) || ( !isset( $tabs[ $tab ] ) && !in_array( $tab, (array) $nonmenu_tabs ) ) )
 			$tab = key( $tabs );
 
-		$args = array( 'page' => $paged, 'per_page' => $per_page, 'fields' => array( 'last_updated' => true, 'downloaded' => true ) );
+		$args = array(
+			'page' => $paged,
+			'per_page' => $per_page,
+			'fields' => array( 'last_updated' => true, 'downloaded' => true ),
+			// Send the locale and installed plugin slugs to the API so it can provide context-sensitive results.
+			'locale' => get_locale(),
+			'installed_plugins' => $this->get_installed_plugin_slugs(),
+		);
 
 		switch ( $tab ) {
 			case 'search':