diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-includes/customize/class-wp-customize-header-image-control.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/customize/class-wp-customize-header-image-control.php	Mon Oct 14 17:39:30 2019 +0200
@@ -0,0 +1,227 @@
+<?php
+/**
+ * Customize API: WP_Customize_Header_Image_Control class
+ *
+ * @package WordPress
+ * @subpackage Customize
+ * @since 4.4.0
+ */
+
+/**
+ * Customize Header Image Control class.
+ *
+ * @since 3.4.0
+ *
+ * @see WP_Customize_Image_Control
+ */
+class WP_Customize_Header_Image_Control extends WP_Customize_Image_Control {
+	public $type = 'header';
+	public $uploaded_headers;
+	public $default_headers;
+
+	/**
+	 * Constructor.
+	 *
+	 * @since 3.4.0
+	 *
+	 * @param WP_Customize_Manager $manager Customizer bootstrap instance.
+	 */
+	public function __construct( $manager ) {
+		parent::__construct( $manager, 'header_image', array(
+			'label'    => __( 'Header Image' ),
+			'settings' => array(
+				'default' => 'header_image',
+				'data'    => 'header_image_data',
+			),
+			'section'  => 'header_image',
+			'removed'  => 'remove-header',
+			'get_url'  => 'get_header_image',
+		) );
+
+	}
+
+	/**
+	 */
+	public function enqueue() {
+		wp_enqueue_media();
+		wp_enqueue_script( 'customize-views' );
+
+		$this->prepare_control();
+
+		wp_localize_script( 'customize-views', '_wpCustomizeHeader', array(
+			'data' => array(
+				'width' => absint( get_theme_support( 'custom-header', 'width' ) ),
+				'height' => absint( get_theme_support( 'custom-header', 'height' ) ),
+				'flex-width' => absint( get_theme_support( 'custom-header', 'flex-width' ) ),
+				'flex-height' => absint( get_theme_support( 'custom-header', 'flex-height' ) ),
+				'currentImgSrc' => $this->get_current_image_src(),
+			),
+			'nonces' => array(
+				'add' => wp_create_nonce( 'header-add' ),
+				'remove' => wp_create_nonce( 'header-remove' ),
+			),
+			'uploads' => $this->uploaded_headers,
+			'defaults' => $this->default_headers
+		) );
+
+		parent::enqueue();
+	}
+
+	/**
+	 *
+	 * @global Custom_Image_Header $custom_image_header
+	 */
+	public function prepare_control() {
+		global $custom_image_header;
+		if ( empty( $custom_image_header ) ) {
+			return;
+		}
+
+		add_action( 'customize_controls_print_footer_scripts', array( $this, 'print_header_image_template' ) );
+
+		// Process default headers and uploaded headers.
+		$custom_image_header->process_default_headers();
+		$this->default_headers = $custom_image_header->get_default_header_images();
+		$this->uploaded_headers = $custom_image_header->get_uploaded_header_images();
+	}
+
+	/**
+	 */
+	public function print_header_image_template() {
+		?>
+		<script type="text/template" id="tmpl-header-choice">
+			<# if (data.random) { #>
+			<button type="button" class="button display-options random">
+				<span class="dashicons dashicons-randomize dice"></span>
+				<# if ( data.type === 'uploaded' ) { #>
+					<?php _e( 'Randomize uploaded headers' ); ?>
+				<# } else if ( data.type === 'default' ) { #>
+					<?php _e( 'Randomize suggested headers' ); ?>
+				<# } #>
+			</button>
+
+			<# } else { #>
+
+			<button type="button" class="choice thumbnail"
+				data-customize-image-value="{{{data.header.url}}}"
+				data-customize-header-image-data="{{JSON.stringify(data.header)}}">
+				<span class="screen-reader-text"><?php _e( 'Set image' ); ?></span>
+				<img src="{{{data.header.thumbnail_url}}}" alt="{{{data.header.alt_text || data.header.description}}}">
+			</button>
+
+			<# if ( data.type === 'uploaded' ) { #>
+				<button type="button" class="dashicons dashicons-no close"><span class="screen-reader-text"><?php _e( 'Remove image' ); ?></span></button>
+			<# } #>
+
+			<# } #>
+		</script>
+
+		<script type="text/template" id="tmpl-header-current">
+			<# if (data.choice) { #>
+				<# if (data.random) { #>
+
+			<div class="placeholder">
+				<span class="dashicons dashicons-randomize dice"></span>
+				<# if ( data.type === 'uploaded' ) { #>
+					<?php _e( 'Randomizing uploaded headers' ); ?>
+				<# } else if ( data.type === 'default' ) { #>
+					<?php _e( 'Randomizing suggested headers' ); ?>
+				<# } #>
+			</div>
+
+				<# } else { #>
+
+			<img src="{{{data.header.thumbnail_url}}}" alt="{{{data.header.alt_text || data.header.description}}}" />
+
+				<# } #>
+			<# } else { #>
+
+			<div class="placeholder">
+				<?php _e( 'No image set' ); ?>
+			</div>
+
+			<# } #>
+		</script>
+		<?php
+	}
+
+	/**
+	 * @return string|void
+	 */
+	public function get_current_image_src() {
+		$src = $this->value();
+		if ( isset( $this->get_url ) ) {
+			$src = call_user_func( $this->get_url, $src );
+			return $src;
+		}
+	}
+
+	/**
+	 */
+	public function render_content() {
+		$visibility = $this->get_current_image_src() ? '' : ' style="display:none" ';
+		$width = absint( get_theme_support( 'custom-header', 'width' ) );
+		$height = absint( get_theme_support( 'custom-header', 'height' ) );
+		?>
+		<div class="customize-control-content">
+			<?php if ( current_theme_supports( 'custom-header', 'video' ) ) {
+				echo '<span class="customize-control-title">' . $this->label . '</span>';
+			} ?>
+			<div class="customize-control-notifications-container"></div>
+			<p class="customizer-section-intro customize-control-description">
+				<?php
+				if ( current_theme_supports( 'custom-header', 'video' ) ) {
+					_e( 'Click &#8220;Add new image&#8221; to upload an image file from your computer. Your theme works best with an image that matches the size of your video &#8212; you&#8217;ll be able to crop your image once you upload it for a perfect fit.' );
+				} elseif ( $width && $height ) {
+					/* translators: %s: header size in pixels */
+					printf( __( 'Click &#8220;Add new image&#8221; to upload an image file from your computer. Your theme works best with an image with a header size of %s pixels &#8212; you&#8217;ll be able to crop your image once you upload it for a perfect fit.' ),
+						sprintf( '<strong>%s &times; %s</strong>', $width, $height )
+					);
+				} elseif ( $width ) {
+					/* translators: %s: header width in pixels */
+					printf( __( 'Click &#8220;Add new image&#8221; to upload an image file from your computer. Your theme works best with an image with a header width of %s pixels &#8212; you&#8217;ll be able to crop your image once you upload it for a perfect fit.' ),
+						sprintf( '<strong>%s</strong>', $width )
+					);
+				} else {
+					/* translators: %s: header height in pixels */
+					printf( __( 'Click &#8220;Add new image&#8221; to upload an image file from your computer. Your theme works best with an image with a header height of %s pixels &#8212; you&#8217;ll be able to crop your image once you upload it for a perfect fit.' ),
+						sprintf( '<strong>%s</strong>', $height )
+					);
+				}
+				?>
+			</p>
+			<div class="current">
+				<label for="header_image-button">
+					<span class="customize-control-title">
+						<?php _e( 'Current header' ); ?>
+					</span>
+				</label>
+				<div class="container">
+				</div>
+			</div>
+			<div class="actions">
+				<?php if ( current_user_can( 'upload_files' ) ): ?>
+				<button type="button"<?php echo $visibility; ?> class="button remove" aria-label="<?php esc_attr_e( 'Hide header image' ); ?>"><?php _e( 'Hide image' ); ?></button>
+				<button type="button" class="button new" id="header_image-button" aria-label="<?php esc_attr_e( 'Add new header image' ); ?>"><?php _e( 'Add new image' ); ?></button>
+				<?php endif; ?>
+			</div>
+			<div class="choices">
+				<span class="customize-control-title header-previously-uploaded">
+					<?php _ex( 'Previously uploaded', 'custom headers' ); ?>
+				</span>
+				<div class="uploaded">
+					<div class="list">
+					</div>
+				</div>
+				<span class="customize-control-title header-default">
+					<?php _ex( 'Suggested', 'custom headers' ); ?>
+				</span>
+				<div class="default">
+					<div class="list">
+					</div>
+				</div>
+			</div>
+		</div>
+		<?php
+	}
+}