diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-includes/customize/class-wp-customize-media-control.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/customize/class-wp-customize-media-control.php	Mon Oct 14 17:39:30 2019 +0200
@@ -0,0 +1,263 @@
+<?php
+/**
+ * Customize API: WP_Customize_Media_Control class
+ *
+ * @package WordPress
+ * @subpackage Customize
+ * @since 4.4.0
+ */
+
+/**
+ * Customize Media Control class.
+ *
+ * @since 4.2.0
+ *
+ * @see WP_Customize_Control
+ */
+class WP_Customize_Media_Control extends WP_Customize_Control {
+	/**
+	 * Control type.
+	 *
+	 * @since 4.2.0
+	 * @var string
+	 */
+	public $type = 'media';
+
+	/**
+	 * Media control mime type.
+	 *
+	 * @since 4.2.0
+	 * @var string
+	 */
+	public $mime_type = '';
+
+	/**
+	 * Button labels.
+	 *
+	 * @since 4.2.0
+	 * @var array
+	 */
+	public $button_labels = array();
+
+	/**
+	 * Constructor.
+	 *
+	 * @since 4.1.0
+	 * @since 4.2.0 Moved from WP_Customize_Upload_Control.
+	 *
+	 * @param WP_Customize_Manager $manager Customizer bootstrap instance.
+	 * @param string               $id      Control ID.
+	 * @param array                $args    Optional. Arguments to override class property defaults.
+	 */
+	public function __construct( $manager, $id, $args = array() ) {
+		parent::__construct( $manager, $id, $args );
+
+		$this->button_labels = wp_parse_args( $this->button_labels, $this->get_default_button_labels() );
+	}
+
+	/**
+	 * Enqueue control related scripts/styles.
+	 *
+	 * @since 3.4.0
+	 * @since 4.2.0 Moved from WP_Customize_Upload_Control.
+	 */
+	public function enqueue() {
+		wp_enqueue_media();
+	}
+
+	/**
+	 * Refresh the parameters passed to the JavaScript via JSON.
+	 *
+	 * @since 3.4.0
+	 * @since 4.2.0 Moved from WP_Customize_Upload_Control.
+	 *
+	 * @see WP_Customize_Control::to_json()
+	 */
+	public function to_json() {
+		parent::to_json();
+		$this->json['label'] = html_entity_decode( $this->label, ENT_QUOTES, get_bloginfo( 'charset' ) );
+		$this->json['mime_type'] = $this->mime_type;
+		$this->json['button_labels'] = $this->button_labels;
+		$this->json['canUpload'] = current_user_can( 'upload_files' );
+
+		$value = $this->value();
+
+		if ( is_object( $this->setting ) ) {
+			if ( $this->setting->default ) {
+				// Fake an attachment model - needs all fields used by template.
+				// Note that the default value must be a URL, NOT an attachment ID.
+				$type = in_array( substr( $this->setting->default, -3 ), array( 'jpg', 'png', 'gif', 'bmp' ) ) ? 'image' : 'document';
+				$default_attachment = array(
+					'id' => 1,
+					'url' => $this->setting->default,
+					'type' => $type,
+					'icon' => wp_mime_type_icon( $type ),
+					'title' => basename( $this->setting->default ),
+				);
+
+				if ( 'image' === $type ) {
+					$default_attachment['sizes'] = array(
+						'full' => array( 'url' => $this->setting->default ),
+					);
+				}
+
+				$this->json['defaultAttachment'] = $default_attachment;
+			}
+
+			if ( $value && $this->setting->default && $value === $this->setting->default ) {
+				// Set the default as the attachment.
+				$this->json['attachment'] = $this->json['defaultAttachment'];
+			} elseif ( $value ) {
+				$this->json['attachment'] = wp_prepare_attachment_for_js( $value );
+			}
+		}
+	}
+
+	/**
+	 * Don't render any content for this control from PHP.
+	 *
+	 * @since 3.4.0
+	 * @since 4.2.0 Moved from WP_Customize_Upload_Control.
+	 *
+	 * @see WP_Customize_Media_Control::content_template()
+	 */
+	public function render_content() {}
+
+	/**
+	 * Render a JS template for the content of the media control.
+	 *
+	 * @since 4.1.0
+	 * @since 4.2.0 Moved from WP_Customize_Upload_Control.
+	 */
+	public function content_template() {
+		?>
+		<#
+		var selectButtonId = _.uniqueId( 'customize-media-control-button-' );
+		var descriptionId = _.uniqueId( 'customize-media-control-description-' );
+		var describedByAttr = data.description ? ' aria-describedby="' + descriptionId + '" ' : '';
+		#>
+		<# if ( data.label ) { #>
+			<label class="customize-control-title" for="{{ selectButtonId }}">{{ data.label }}</label>
+		<# } #>
+		<div class="customize-control-notifications-container"></div>
+		<# if ( data.description ) { #>
+			<span id="{{ descriptionId }}" class="description customize-control-description">{{{ data.description }}}</span>
+		<# } #>
+
+		<# if ( data.attachment && data.attachment.id ) { #>
+			<div class="attachment-media-view attachment-media-view-{{ data.attachment.type }} {{ data.attachment.orientation }}">
+				<div class="thumbnail thumbnail-{{ data.attachment.type }}">
+					<# if ( 'image' === data.attachment.type && data.attachment.sizes && data.attachment.sizes.medium ) { #>
+						<img class="attachment-thumb" src="{{ data.attachment.sizes.medium.url }}" draggable="false" alt="" />
+					<# } else if ( 'image' === data.attachment.type && data.attachment.sizes && data.attachment.sizes.full ) { #>
+						<img class="attachment-thumb" src="{{ data.attachment.sizes.full.url }}" draggable="false" alt="" />
+					<# } else if ( 'audio' === data.attachment.type ) { #>
+						<# if ( data.attachment.image && data.attachment.image.src && data.attachment.image.src !== data.attachment.icon ) { #>
+							<img src="{{ data.attachment.image.src }}" class="thumbnail" draggable="false" alt="" />
+						<# } else { #>
+							<img src="{{ data.attachment.icon }}" class="attachment-thumb type-icon" draggable="false" alt="" />
+						<# } #>
+						<p class="attachment-meta attachment-meta-title">&#8220;{{ data.attachment.title }}&#8221;</p>
+						<# if ( data.attachment.album || data.attachment.meta.album ) { #>
+						<p class="attachment-meta"><em>{{ data.attachment.album || data.attachment.meta.album }}</em></p>
+						<# } #>
+						<# if ( data.attachment.artist || data.attachment.meta.artist ) { #>
+						<p class="attachment-meta">{{ data.attachment.artist || data.attachment.meta.artist }}</p>
+						<# } #>
+						<audio style="visibility: hidden" controls class="wp-audio-shortcode" width="100%" preload="none">
+							<source type="{{ data.attachment.mime }}" src="{{ data.attachment.url }}"/>
+						</audio>
+					<# } else if ( 'video' === data.attachment.type ) { #>
+						<div class="wp-media-wrapper wp-video">
+							<video controls="controls" class="wp-video-shortcode" preload="metadata"
+								<# if ( data.attachment.image && data.attachment.image.src !== data.attachment.icon ) { #>poster="{{ data.attachment.image.src }}"<# } #>>
+								<source type="{{ data.attachment.mime }}" src="{{ data.attachment.url }}"/>
+							</video>
+						</div>
+					<# } else { #>
+						<img class="attachment-thumb type-icon icon" src="{{ data.attachment.icon }}" draggable="false" alt="" />
+						<p class="attachment-title">{{ data.attachment.title }}</p>
+					<# } #>
+				</div>
+				<div class="actions">
+					<# if ( data.canUpload ) { #>
+					<button type="button" class="button remove-button">{{ data.button_labels.remove }}</button>
+					<button type="button" class="button upload-button control-focus" id="{{ selectButtonId }}" {{{ describedByAttr }}}>{{ data.button_labels.change }}</button>
+					<# } #>
+				</div>
+			</div>
+		<# } else { #>
+			<div class="attachment-media-view">
+				<div class="placeholder">
+						{{ data.button_labels.placeholder }}
+				</div>
+				<div class="actions">
+					<# if ( data.defaultAttachment ) { #>
+						<button type="button" class="button default-button">{{ data.button_labels['default'] }}</button>
+					<# } #>
+					<# if ( data.canUpload ) { #>
+					<button type="button" class="button upload-button" id="{{ selectButtonId }}" {{{ describedByAttr }}}>{{ data.button_labels.select }}</button>
+					<# } #>
+				</div>
+			</div>
+		<# } #>
+		<?php
+	}
+
+	/**
+	 * Get default button labels.
+	 *
+	 * Provides an array of the default button labels based on the mime type of the current control.
+	 *
+	 * @since 4.9.0
+	 *
+	 * @return array An associative array of default button labels.
+	 */
+	public function get_default_button_labels() {
+		// Get just the mime type and strip the mime subtype if present.
+		$mime_type = ! empty( $this->mime_type ) ? strtok( ltrim( $this->mime_type, '/' ), '/' ) : 'default';
+
+		switch ( $mime_type ) {
+			case 'video':
+				return array(
+					'select'       => __( 'Select video' ),
+					'change'       => __( 'Change video' ),
+					'default'      => __( 'Default' ),
+					'remove'       => __( 'Remove' ),
+					'placeholder'  => __( 'No video selected' ),
+					'frame_title'  => __( 'Select video' ),
+					'frame_button' => __( 'Choose video' ),
+				);
+			case 'audio':
+				return array(
+					'select'       => __( 'Select audio' ),
+					'change'       => __( 'Change audio' ),
+					'default'      => __( 'Default' ),
+					'remove'       => __( 'Remove' ),
+					'placeholder'  => __( 'No audio selected' ),
+					'frame_title'  => __( 'Select audio' ),
+					'frame_button' => __( 'Choose audio' ),
+				);
+			case 'image':
+				return array(
+					'select'       => __( 'Select image' ),
+					'change'       => __( 'Change image' ),
+					'default'      => __( 'Default' ),
+					'remove'       => __( 'Remove' ),
+					'placeholder'  => __( 'No image selected' ),
+					'frame_title'  => __( 'Select image' ),
+					'frame_button' => __( 'Choose image' ),
+				);
+			default:
+				return array(
+					'select'       => __( 'Select file' ),
+					'change'       => __( 'Change file' ),
+					'default'      => __( 'Default' ),
+					'remove'       => __( 'Remove' ),
+					'placeholder'  => __( 'No file selected' ),
+					'frame_title'  => __( 'Select file' ),
+					'frame_button' => __( 'Choose file' ),
+				);
+		} // End switch().
+	}
+}