diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-includes/widgets/class-wp-widget-media-video.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/widgets/class-wp-widget-media-video.php	Mon Oct 14 17:39:30 2019 +0200
@@ -0,0 +1,251 @@
+<?php
+/**
+ * Widget API: WP_Widget_Media_Video class
+ *
+ * @package WordPress
+ * @subpackage Widgets
+ * @since 4.8.0
+ */
+
+/**
+ * Core class that implements a video widget.
+ *
+ * @since 4.8.0
+ *
+ * @see WP_Widget
+ */
+class WP_Widget_Media_Video extends WP_Widget_Media {
+
+	/**
+	 * Constructor.
+	 *
+	 * @since  4.8.0
+	 */
+	public function __construct() {
+		parent::__construct( 'media_video', __( 'Video' ), array(
+			'description' => __( 'Displays a video from the media library or from YouTube, Vimeo, or another provider.' ),
+			'mime_type'   => 'video',
+		) );
+
+		$this->l10n = array_merge( $this->l10n, array(
+			'no_media_selected' => __( 'No video selected' ),
+			'add_media' => _x( 'Add Video', 'label for button in the video widget' ),
+			'replace_media' => _x( 'Replace Video', 'label for button in the video widget; should preferably not be longer than ~13 characters long' ),
+			'edit_media' => _x( 'Edit Video', 'label for button in the video widget; should preferably not be longer than ~13 characters long' ),
+			'missing_attachment' => sprintf(
+				/* translators: %s: URL to media library */
+				__( 'We can&#8217;t find that video. Check your <a href="%s">media library</a> and make sure it wasn&#8217;t deleted.' ),
+				esc_url( admin_url( 'upload.php' ) )
+			),
+			/* translators: %d: widget count */
+			'media_library_state_multi' => _n_noop( 'Video Widget (%d)', 'Video Widget (%d)' ),
+			'media_library_state_single' => __( 'Video Widget' ),
+			/* translators: %s: a list of valid video file extensions */
+			'unsupported_file_type' => sprintf( __( 'Sorry, we can&#8217;t load the video at the supplied URL. Please check that the URL is for a supported video file (%s) or stream (e.g. YouTube and Vimeo).' ), '<code>.' . implode( '</code>, <code>.', wp_get_video_extensions() ) . '</code>' ),
+		) );
+	}
+
+	/**
+	 * Get schema for properties of a widget instance (item).
+	 *
+	 * @since  4.8.0
+	 *
+	 * @see WP_REST_Controller::get_item_schema()
+	 * @see WP_REST_Controller::get_additional_fields()
+	 * @link https://core.trac.wordpress.org/ticket/35574
+	 * @return array Schema for properties.
+	 */
+	public function get_instance_schema() {
+		$schema = array_merge(
+			parent::get_instance_schema(),
+			array(
+				'preload' => array(
+					'type' => 'string',
+					'enum' => array( 'none', 'auto', 'metadata' ),
+					'default' => 'metadata',
+					'description' => __( 'Preload' ),
+					'should_preview_update' => false,
+				),
+				'loop' => array(
+					'type' => 'boolean',
+					'default' => false,
+					'description' => __( 'Loop' ),
+					'should_preview_update' => false,
+				),
+				'content' => array(
+					'type' => 'string',
+					'default' => '',
+					'sanitize_callback' => 'wp_kses_post',
+					'description' => __( 'Tracks (subtitles, captions, descriptions, chapters, or metadata)' ),
+					'should_preview_update' => false,
+				),
+			)
+		);
+
+		foreach ( wp_get_video_extensions() as $video_extension ) {
+			$schema[ $video_extension ] = array(
+				'type' => 'string',
+				'default' => '',
+				'format' => 'uri',
+				/* translators: %s: video extension */
+				'description' => sprintf( __( 'URL to the %s video source file' ), $video_extension ),
+			);
+		}
+
+		return $schema;
+	}
+
+	/**
+	 * Render the media on the frontend.
+	 *
+	 * @since  4.8.0
+	 *
+	 * @param array $instance Widget instance props.
+	 *
+	 * @return void
+	 */
+	public function render_media( $instance ) {
+		$instance = array_merge( wp_list_pluck( $this->get_instance_schema(), 'default' ), $instance );
+		$attachment = null;
+
+		if ( $this->is_attachment_with_mime_type( $instance['attachment_id'], $this->widget_options['mime_type'] ) ) {
+			$attachment = get_post( $instance['attachment_id'] );
+		}
+
+		$src = $instance['url'];
+		if ( $attachment ) {
+			$src = wp_get_attachment_url( $attachment->ID );
+		}
+
+		if ( empty( $src ) ) {
+			return;
+		}
+
+		$youtube_pattern = '#^https?://(?:www\.)?(?:youtube\.com/watch|youtu\.be/)#';
+		$vimeo_pattern   = '#^https?://(.+\.)?vimeo\.com/.*#';
+
+		if ( $attachment || preg_match( $youtube_pattern, $src ) || preg_match( $vimeo_pattern, $src ) ) {
+			add_filter( 'wp_video_shortcode', array( $this, 'inject_video_max_width_style' ) );
+
+			echo wp_video_shortcode(
+				array_merge(
+					$instance,
+					compact( 'src' )
+				),
+				$instance['content']
+			);
+
+			remove_filter( 'wp_video_shortcode', array( $this, 'inject_video_max_width_style' ) );
+		} else {
+			echo $this->inject_video_max_width_style( wp_oembed_get( $src ) );
+		}
+	}
+
+	/**
+	 * Inject max-width and remove height for videos too constrained to fit inside sidebars on frontend.
+	 *
+	 * @since 4.8.0
+	 *
+	 * @param string $html Video shortcode HTML output.
+	 * @return string HTML Output.
+	 */
+	public function inject_video_max_width_style( $html ) {
+		$html = preg_replace( '/\sheight="\d+"/', '', $html );
+		$html = preg_replace( '/\swidth="\d+"/', '', $html );
+		$html = preg_replace( '/(?<=width:)\s*\d+px(?=;?)/', '100%', $html );
+		return $html;
+	}
+
+	/**
+	 * Enqueue preview scripts.
+	 *
+	 * These scripts normally are enqueued just-in-time when a video shortcode is used.
+	 * In the customizer, however, widgets can be dynamically added and rendered via
+	 * selective refresh, and so it is important to unconditionally enqueue them in
+	 * case a widget does get added.
+	 *
+	 * @since 4.8.0
+	 */
+	public function enqueue_preview_scripts() {
+		/** This filter is documented in wp-includes/media.php */
+		if ( 'mediaelement' === apply_filters( 'wp_video_shortcode_library', 'mediaelement' ) ) {
+			wp_enqueue_style( 'wp-mediaelement' );
+			wp_enqueue_script( 'mediaelement-vimeo' );
+			wp_enqueue_script( 'wp-mediaelement' );
+		}
+	}
+
+	/**
+	 * Loads the required scripts and styles for the widget control.
+	 *
+	 * @since 4.8.0
+	 */
+	public function enqueue_admin_scripts() {
+		parent::enqueue_admin_scripts();
+
+		$handle = 'media-video-widget';
+		wp_enqueue_script( $handle );
+
+		$exported_schema = array();
+		foreach ( $this->get_instance_schema() as $field => $field_schema ) {
+			$exported_schema[ $field ] = wp_array_slice_assoc( $field_schema, array( 'type', 'default', 'enum', 'minimum', 'format', 'media_prop', 'should_preview_update' ) );
+		}
+		wp_add_inline_script(
+			$handle,
+			sprintf(
+				'wp.mediaWidgets.modelConstructors[ %s ].prototype.schema = %s;',
+				wp_json_encode( $this->id_base ),
+				wp_json_encode( $exported_schema )
+			)
+		);
+
+		wp_add_inline_script(
+			$handle,
+			sprintf(
+				'
+					wp.mediaWidgets.controlConstructors[ %1$s ].prototype.mime_type = %2$s;
+					wp.mediaWidgets.controlConstructors[ %1$s ].prototype.l10n = _.extend( {}, wp.mediaWidgets.controlConstructors[ %1$s ].prototype.l10n, %3$s );
+				',
+				wp_json_encode( $this->id_base ),
+				wp_json_encode( $this->widget_options['mime_type'] ),
+				wp_json_encode( $this->l10n )
+			)
+		);
+	}
+
+	/**
+	 * Render form template scripts.
+	 *
+	 * @since 4.8.0
+	 */
+	public function render_control_template_scripts() {
+		parent::render_control_template_scripts()
+		?>
+		<script type="text/html" id="tmpl-wp-media-widget-video-preview">
+			<# if ( data.error && 'missing_attachment' === data.error ) { #>
+				<div class="notice notice-error notice-alt notice-missing-attachment">
+					<p><?php echo $this->l10n['missing_attachment']; ?></p>
+				</div>
+			<# } else if ( data.error && 'unsupported_file_type' === data.error ) { #>
+				<div class="notice notice-error notice-alt notice-missing-attachment">
+					<p><?php echo $this->l10n['unsupported_file_type']; ?></p>
+				</div>
+			<# } else if ( data.error ) { #>
+				<div class="notice notice-error notice-alt">
+					<p><?php _e( 'Unable to preview media due to an unknown error.' ); ?></p>
+				</div>
+			<# } else if ( data.is_oembed && data.model.poster ) { #>
+				<a href="{{ data.model.src }}" target="_blank" class="media-widget-video-link">
+					<img src="{{ data.model.poster }}" />
+				</a>
+			<# } else if ( data.is_oembed ) { #>
+				<a href="{{ data.model.src }}" target="_blank" class="media-widget-video-link no-poster">
+					<span class="dashicons dashicons-format-video"></span>
+				</a>
+			<# } else if ( data.model.src ) { #>
+				<?php wp_underscore_video_template() ?>
+			<# } #>
+		</script>
+		<?php
+	}
+}