Create a new Backbone view, `media.view.Label`, which can be used as a subview in things like toolbars, which need screen reader text.

Make an initial instance of it for the label for Bulk Actions in Media Grid.

See #29026.

Built from https://develop.svn.wordpress.org/trunk@29434


git-svn-id: http://core.svn.wordpress.org/trunk@29212 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/media-grid.js

@@ -540,6 +540,13 @@
 
 			});
 
+			this.views.add( new media.view.Label({
+				value: l10n.bulkActionsLabel,
+				attributes: {
+					'for': 'bulk-select-dropdown'
+				}
+			}) );
+
 			this.views.add(
 				new media.view.BulkSelectionActionDropdown({
 					controller: this
@@ -566,6 +573,7 @@
 	 */
 	media.view.BulkSelectionActionDropdown = media.View.extend({
 		tagName: 'select',
+		id:      'bulk-select-dropdown',
 
 		initialize: function() {
 			media.view.Button.prototype.initialize.apply( this, arguments );

wp-includes/js/media-views.js

@@ -6567,6 +6567,25 @@
 		}
 	});
 
+	/**
+	 * @constructor
+	 * @augments wp.media.View
+	 * @augments wp.Backbone.View
+	 * @augments Backbone.View
+	 */
+	media.view.Label = media.View.extend({
+		tagName: 'label',
+		className: 'screen-reader-text',
+
+		initialize: function() {
+			this.value = this.options.value;
+		},
+
+		render: function() {
+			this.$el.html( this.value );
+		}
+	});
+
 	/**
 	 * wp.media.view.EmbedUrl
 	 *

wp-includes/media.php

@@ -2937,6 +2937,7 @@ function wp_enqueue_media( $args = array() ) {
 		'warnDelete'             => __( "You are about to permanently delete this item.\n  'Cancel' to stop, 'OK' to delete." ),
 		'warnBulkDelete'         => __( "You are about to permanently delete these items.\n  'Cancel' to stop, 'OK' to delete." ),
 		'bulkActions'            => __( 'Bulk Actions' ),
+		'bulkActionsLabel'       => __( 'Select bulk action' ),
 		'deletePermanently'      => __( 'Delete Permanently' ),
 		'apply'                  => __( 'Apply' ),