<?php

/**

 * Custom Header functionality for Twenty Fifteen

 *

 * @package WordPress

 * @subpackage Twenty_Fifteen

 * @since Twenty Fifteen 1.0

 */

/**

 * Set up the WordPress core custom header feature.

 *

 * @uses twentyfifteen_header_style()

 */

function twentyfifteen_custom_header_setup() {

	$color_scheme        = twentyfifteen_get_color_scheme();

	$default_text_color  = trim( $color_scheme[4], '#' );

	/**

	 * Filter Twenty Fifteen custom-header support arguments.

	 *

	 * @since Twenty Fifteen 1.0

	 *

	 * @param array $args {

	 *     An array of custom-header support arguments.

	 *

	 *     @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.

	 * }

	 */

	add_theme_support( 'custom-header', apply_filters( 'twentyfifteen_custom_header_args', array(

		'default-text-color'     => $default_text_color,

		'width'                  => 954,

		'height'                 => 1300,

		'wp-head-callback'       => 'twentyfifteen_header_style',

	) ) );

}

add_action( 'after_setup_theme', 'twentyfifteen_custom_header_setup' );

/**

 * Convert HEX to RGB.

 *

 * @since Twenty Fifteen 1.0

 *

 * @param string $color The original color, in 3- or 6-digit hexadecimal form.

 * @return array Array containing RGB (red, green, and blue) values for the given

 *               HEX code, empty array otherwise.

 */

function twentyfifteen_hex2rgb( $color ) {

	$color = trim( $color, '#' );

	if ( strlen( $color ) == 3 ) {

		$r = hexdec( substr( $color, 0, 1 ).substr( $color, 0, 1 ) );

		$g = hexdec( substr( $color, 1, 1 ).substr( $color, 1, 1 ) );

		$b = hexdec( substr( $color, 2, 1 ).substr( $color, 2, 1 ) );

	} else if ( strlen( $color ) == 6 ) {

		$r = hexdec( substr( $color, 0, 2 ) );

		$g = hexdec( substr( $color, 2, 2 ) );

		$b = hexdec( substr( $color, 4, 2 ) );

	} else {

		return array();

	}

	return array( 'red' => $r, 'green' => $g, 'blue' => $b );

}

if ( ! function_exists( 'twentyfifteen_header_style' ) ) :

/**

 * Styles the header image and text displayed on the blog.

 *

 * @since Twenty Fifteen 1.0

 *

 * @see twentyfifteen_custom_header_setup()

 */

function twentyfifteen_header_style() {

	$header_image = get_header_image();

	// If no custom options for text are set, let's bail.

	if ( empty( $header_image ) && display_header_text() ) {

		return;

	}

	// If we get this far, we have custom styles. Let's do this.

	?>

	<style type="text/css" id="twentyfifteen-header-css">

	<?php

		// Short header for when there is no Custom Header and Header Text is hidden.

		if ( empty( $header_image ) && ! display_header_text() ) :

	?>

		.site-header {

			padding-top: 14px;

			padding-bottom: 14px;

		}

		.site-branding {

			min-height: 42px;

		}

		@media screen and (min-width: 46.25em) {

			.site-header {

				padding-top: 21px;

				padding-bottom: 21px;

			}

			.site-branding {

				min-height: 56px;

			}

		}

		@media screen and (min-width: 55em) {

			.site-header {

				padding-top: 25px;

				padding-bottom: 25px;

			}

			.site-branding {

				min-height: 62px;

			}

		}

		@media screen and (min-width: 59.6875em) {

			.site-header {

				padding-top: 0;

				padding-bottom: 0;

			}

			.site-branding {

				min-height: 0;

			}

		}

	<?php

		endif;

		// Has a Custom Header been added?

		if ( ! empty( $header_image ) ) :

	?>

		.site-header {

			background: url(<?php header_image(); ?>) no-repeat 50% 50%;

			-webkit-background-size: cover;

			-moz-background-size:    cover;

			-o-background-size:      cover;

			background-size:         cover;

		}

		@media screen and (min-width: 59.6875em) {

			body:before {

				background: url(<?php header_image(); ?>) no-repeat 100% 50%;

				-webkit-background-size: cover;

				-moz-background-size:    cover;

				-o-background-size:      cover;

				background-size:         cover;

				border-right: 0;

			}

			.site-header {

				background: transparent;

			}

		}

	<?php

		endif;

		// Has the text been hidden?

		if ( ! display_header_text() ) :

	?>

		.site-title,

		.site-description {

			clip: rect(1px, 1px, 1px, 1px);

			position: absolute;

		}

	<?php endif; ?>

	</style>

	<?php

}

endif; // twentyfifteen_header_style

/**

 * Enqueues front-end CSS for the header background color.

 *

 * @since Twenty Fifteen 1.0

 *

 * @see wp_add_inline_style()

 */

function twentyfifteen_header_background_color_css() {

	$color_scheme            = twentyfifteen_get_color_scheme();

	$default_color           = $color_scheme[1];

	$header_background_color = get_theme_mod( 'header_background_color', $default_color );

	// Don't do anything if the current color is the default.

	if ( $header_background_color === $default_color ) {

		return;

	}

	$css = '

		/* Custom Header Background Color */

		body:before,

		.site-header {

			background-color: %1$s;

		}

		@media screen and (min-width: 59.6875em) {

			.site-header,

			.secondary {

				background-color: transparent;

			}

			.widget button,

			.widget input[type="button"],

			.widget input[type="reset"],

			.widget input[type="submit"],

			.widget_calendar tbody a,

			.widget_calendar tbody a:hover,

			.widget_calendar tbody a:focus {

				color: %1$s;

			}

		}

	';

	wp_add_inline_style( 'twentyfifteen-style', sprintf( $css, $header_background_color ) );

}

add_action( 'wp_enqueue_scripts', 'twentyfifteen_header_background_color_css', 11 );

/**

 * Enqueues front-end CSS for the sidebar text color.

 *

 * @since Twenty Fifteen 1.0

 */

function twentyfifteen_sidebar_text_color_css() {

	$color_scheme       = twentyfifteen_get_color_scheme();

	$default_color      = $color_scheme[4];

	$sidebar_link_color = get_theme_mod( 'sidebar_textcolor', $default_color );

	// Don't do anything if the current color is the default.

	if ( $sidebar_link_color === $default_color ) {

		return;

	}

	// If we get this far, we have custom styles. Let's do this.

	$sidebar_link_color_rgb     = twentyfifteen_hex2rgb( $sidebar_link_color );

	$sidebar_text_color         = vsprintf( 'rgba( %1$s, %2$s, %3$s, 0.7)', $sidebar_link_color_rgb );

	$sidebar_border_color       = vsprintf( 'rgba( %1$s, %2$s, %3$s, 0.1)', $sidebar_link_color_rgb );

	$sidebar_border_focus_color = vsprintf( 'rgba( %1$s, %2$s, %3$s, 0.3)', $sidebar_link_color_rgb );

	$css = '

		/* Custom Sidebar Text Color */

		.site-title a,

		.site-description,

		.secondary-toggle:before {

			color: %1$s;

		}

		.site-title a:hover,

		.site-title a:focus {

			color: %1$s; /* Fallback for IE7 and IE8 */

			color: %2$s;

		}

		.secondary-toggle {

			border-color: %1$s; /* Fallback for IE7 and IE8 */

			border-color: %3$s;

		}

		.secondary-toggle:hover,

		.secondary-toggle:focus {

			border-color: %1$s; /* Fallback for IE7 and IE8 */

			border-color: %4$s;

		}

		.site-title a {

			outline-color: %1$s; /* Fallback for IE7 and IE8 */

			outline-color: %4$s;

		}

		@media screen and (min-width: 59.6875em) {

			.secondary a,

			.dropdown-toggle:after,

			.widget-title,

			.widget blockquote cite,

			.widget blockquote small {

				color: %1$s;

			}

			.widget button,

			.widget input[type="button"],

			.widget input[type="reset"],

			.widget input[type="submit"],

			.widget_calendar tbody a {

				background-color: %1$s;

			}

			.textwidget a {

				border-color: %1$s;

			}

			.secondary a:hover,

			.secondary a:focus,

			.main-navigation .menu-item-description,

			.widget,

			.widget blockquote,

			.widget .wp-caption-text,

			.widget .gallery-caption {

				color: %2$s;

			}

			.widget button:hover,

			.widget button:focus,

			.widget input[type="button"]:hover,

			.widget input[type="button"]:focus,

			.widget input[type="reset"]:hover,

			.widget input[type="reset"]:focus,

			.widget input[type="submit"]:hover,

			.widget input[type="submit"]:focus,

			.widget_calendar tbody a:hover,

			.widget_calendar tbody a:focus {

				background-color: %2$s;

			}

			.widget blockquote {

				border-color: %2$s;

			}

			.main-navigation ul,

			.main-navigation li,

			.secondary-toggle,

			.widget input,

			.widget textarea,

			.widget table,

			.widget th,

			.widget td,

			.widget pre,

			.widget li,

			.widget_categories .children,

			.widget_nav_menu .sub-menu,

			.widget_pages .children,

			.widget abbr[title] {

				border-color: %3$s;

			}

			.dropdown-toggle:hover,

			.dropdown-toggle:focus,

			.widget hr {

				background-color: %3$s;

			}

			.widget input:focus,

			.widget textarea:focus {

				border-color: %4$s;

			}

			.sidebar a:focus,

			.dropdown-toggle:focus {

				outline-color: %4$s;

			}

		}

	';

	wp_add_inline_style( 'twentyfifteen-style', sprintf( $css, $sidebar_link_color, $sidebar_text_color, $sidebar_border_color, $sidebar_border_focus_color ) );

}

add_action( 'wp_enqueue_scripts', 'twentyfifteen_sidebar_text_color_css', 11 );