Sitemaps: Add better support for RTL sites.

While the URLs are intended to be machine readable, they should always be LTR, while other data would be RTL in the sitemap.

Fixes #50449.

Props joyously, SergeyBiryukov, pbiron. apedog, ramiy.


Built from https://develop.svn.wordpress.org/trunk@48414


git-svn-id: http://core.svn.wordpress.org/trunk@48183 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/sitemaps/class-wp-sitemaps-stylesheet.php

@@ -248,7 +248,10 @@ XSL;
 	 * @return string The CSS.
 	 */
 	public function get_stylesheet_css() {
-		$css = '
+		$text_align = is_rtl() ? 'right' : 'left';
+
+		$css = <<<EOF
+		
 					body {
 						font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
 						color: #444;
@@ -259,8 +262,17 @@ XSL;
 						border-collapse: collapse;
 					}
 					
+			 		#sitemap__table tr td.loc {
+						/*
+						 * URLs should always be LTR.
+						 * see https://core.trac.wordpress.org/ticket/16834 and
+						 * https://core.trac.wordpress.org/ticket/49949
+						 */
+						direction: ltr;
+					}
+					
 					#sitemap__table tr th {
-				text-align: left;
+						text-align: {$text_align};
 					}
 					
 					#sitemap__table tr td,
@@ -274,7 +286,8 @@ XSL;
 					
 					a:hover {
 						text-decoration: none;
-			}';
+					}
+EOF;
 
 		/**
 		 * Filters the CSS only for the sitemap stylesheet.

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-beta1-48413';
+$wp_version = '5.5-beta1-48414';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.