diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-content/themes/twentyseventeen/inc/custom-header.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-content/themes/twentyseventeen/inc/custom-header.php	Mon Oct 14 17:39:30 2019 +0200
@@ -0,0 +1,123 @@
+<?php
+/**
+ * Custom header implementation
+ *
+ * @link https://codex.wordpress.org/Custom_Headers
+ *
+ * @package WordPress
+ * @subpackage Twenty_Seventeen
+ * @since 1.0
+ */
+
+/**
+ * Set up the WordPress core custom header feature.
+ *
+ * @uses twentyseventeen_header_style()
+ */
+function twentyseventeen_custom_header_setup() {
+
+	/**
+	 * Filter Twenty Seventeen custom-header support arguments.
+	 *
+	 * @since Twenty Seventeen 1.0
+	 *
+	 * @param array $args {
+	 *     An array of custom-header support arguments.
+	 *
+	 *     @type string $default-image     		Default image of the header.
+	 *     @type string $default_text_color     Default color of the header text.
+	 *     @type int    $width                  Width in pixels of the custom header image. Default 954.
+	 *     @type int    $height                 Height in pixels of the custom header image. Default 1300.
+	 *     @type string $wp-head-callback       Callback function used to styles the header image and text
+	 *                                          displayed on the blog.
+	 *     @type string $flex-height     		Flex support for height of header.
+	 * }
+	 */
+	add_theme_support( 'custom-header', apply_filters( 'twentyseventeen_custom_header_args', array(
+		'default-image'      => get_parent_theme_file_uri( '/assets/images/header.jpg' ),
+		'width'              => 2000,
+		'height'             => 1200,
+		'flex-height'        => true,
+		'video'              => true,
+		'wp-head-callback'   => 'twentyseventeen_header_style',
+	) ) );
+
+	register_default_headers( array(
+		'default-image' => array(
+			'url'           => '%s/assets/images/header.jpg',
+			'thumbnail_url' => '%s/assets/images/header.jpg',
+			'description'   => __( 'Default Header Image', 'twentyseventeen' ),
+		),
+	) );
+}
+add_action( 'after_setup_theme', 'twentyseventeen_custom_header_setup' );
+
+if ( ! function_exists( 'twentyseventeen_header_style' ) ) :
+/**
+ * Styles the header image and text displayed on the blog.
+ *
+ * @see twentyseventeen_custom_header_setup().
+ */
+function twentyseventeen_header_style() {
+	$header_text_color = get_header_textcolor();
+
+	// If no custom options for text are set, let's bail.
+	// get_header_textcolor() options: add_theme_support( 'custom-header' ) is default, hide text (returns 'blank') or any hex value.
+	if ( get_theme_support( 'custom-header', 'default-text-color' ) === $header_text_color ) {
+		return;
+	}
+
+	// If we get this far, we have custom styles. Let's do this.
+	?>
+	<style id="twentyseventeen-custom-header-styles" type="text/css">
+	<?php
+		// Has the text been hidden?
+		if ( 'blank' === $header_text_color ) :
+	?>
+		.site-title,
+		.site-description {
+			position: absolute;
+			clip: rect(1px, 1px, 1px, 1px);
+		}
+	<?php
+		// If the user has set a custom color for the text use that.
+		else :
+	?>
+		.site-title a,
+		.colors-dark .site-title a,
+		.colors-custom .site-title a,
+		body.has-header-image .site-title a,
+		body.has-header-video .site-title a,
+		body.has-header-image.colors-dark .site-title a,
+		body.has-header-video.colors-dark .site-title a,
+		body.has-header-image.colors-custom .site-title a,
+		body.has-header-video.colors-custom .site-title a,
+		.site-description,
+		.colors-dark .site-description,
+		.colors-custom .site-description,
+		body.has-header-image .site-description,
+		body.has-header-video .site-description,
+		body.has-header-image.colors-dark .site-description,
+		body.has-header-video.colors-dark .site-description,
+		body.has-header-image.colors-custom .site-description,
+		body.has-header-video.colors-custom .site-description {
+			color: #<?php echo esc_attr( $header_text_color ); ?>;
+		}
+	<?php endif; ?>
+	</style>
+	<?php
+}
+endif; // End of twentyseventeen_header_style.
+
+/**
+ * Customize video play/pause button in the custom header.
+ *
+ * @param array $settings Video settings.
+ * @return array The filtered video settings.
+ */
+function twentyseventeen_video_controls( $settings ) {
+	$settings['l10n']['play'] = '<span class="screen-reader-text">' . __( 'Play background video', 'twentyseventeen' ) . '</span>' . twentyseventeen_get_svg( array( 'icon' => 'play' ) );
+	$settings['l10n']['pause'] = '<span class="screen-reader-text">' . __( 'Pause background video', 'twentyseventeen' ) . '</span>' . twentyseventeen_get_svg( array( 'icon' => 'pause' ) );
+	return $settings;
+}
+add_filter( 'header_video_settings', 'twentyseventeen_video_controls' );