Wordpress/wp-content/themes/twentytwelve/inc/custom-header.php

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<?php
/**
* Implement an optional custom header for Twenty Twelve.
* http://codex.wordpress.org/Custom_Headers
*
* @package WordPress
* @subpackage Twenty_Twelve
* @since Twenty Twelve 1.0
*/
/**
* Back compat support for get_custom_header().
* New since WordPress version 3.4.
*
* To provide backward compatibility with previous versions, we
* will define our own version of this function.
*
* @todo Should this go into core instead?
*
* @return stdClass All properties represent attributes of the current header image.
*
* @package Twenty_Twelve
* @since Twenty Twelve 1.0
*/
if ( ! function_exists( 'get_custom_header' ) ) {
function get_custom_header() {
return (object) array(
'url' => get_header_image(),
'thumbnail_url' => get_header_image(),
'width' => HEADER_IMAGE_WIDTH,
'height' => HEADER_IMAGE_HEIGHT
);
}
}
/**
* Setup the WordPress core custom header arguments and settings.
*
* Use add_theme_support() to register support for WordPress 3.4+
* as well as provide backward compatibility for previous versions.
*
* Use feature detection of wp_get_theme() which was introduced
* in WordPress 3.4.
*
* @uses twentytwelve_header_style()
* @uses twentytwelve_admin_header_style()
* @uses twentytwelve_admin_header_image()
*
* @package Twenty_Twelve
*/
function twentytwelve_custom_header_setup() {
$args = array(
// Text color and image (empty to use none).
'default-text-color' => '444',
'default-image' => '',
// Set height and width, with a maximum value for the width.
'height' => 250,
'width' => 960,
'max-width' => 2000,
// Support flexible height and width.
'flex-height' => true,
'flex-width' => true,
// Random image rotation off by default.
'random-default' => false,
// Callbacks for styling the header and the admin preview.
'wp-head-callback' => 'twentytwelve_header_style',
'admin-head-callback' => 'twentytwelve_admin_header_style',
'admin-preview-callback' => 'twentytwelve_admin_header_image',
);
// Allow child themes to filter any of these arguments.
$args = apply_filters( 'twentytwelve_custom_header_args', $args );
if ( function_exists( 'wp_get_theme' ) ) {
add_theme_support( 'custom-header', $args );
} else {
// Back compat for < 3.4 versions.
define( 'HEADER_TEXTCOLOR', $args['default-text-color'] );
define( 'HEADER_IMAGE', $args['default-image'] );
define( 'HEADER_IMAGE_WIDTH', $args['width'] );
define( 'HEADER_IMAGE_HEIGHT', $args['height'] );
add_custom_image_header( $args['wp-head-callback'], $args['admin-head-callback'], $args['admin-preview-callback'] );
}
}
add_action( 'after_setup_theme', 'twentytwelve_custom_header_setup' );
/**
* Styles the header text displayed on the blog.
*
* get_header_textcolor() options: 444 is default, hide text (returns 'blank'), or any hex value.
*
* @since Twenty Twelve 1.0
*/
function twentytwelve_header_style() {
$text_color = get_header_textcolor();
// If no custom options for text are set, let's bail
if ( $text_color == get_theme_support( 'custom-header', 'default-text-color' ) )
return;
// If we get this far, we have custom styles.
?>
<style type="text/css">
<?php
// Has the text been hidden?
if ( ! display_header_text() ) :
?>
.site-title,
.site-description {
position: absolute !important;
clip: rect(1px 1px 1px 1px); /* IE6, IE7 */
clip: rect(1px, 1px, 1px, 1px);
}
<?php
// If the user has set a custom color for the text, use that.
else :
?>
.site-title a,
.site-description {
color: #<?php echo $text_color; ?> !important;
}
<?php endif; ?>
</style>
<?php
}
/**
* Styles the header image displayed on the Appearance > Header admin panel.
*
* @since Twenty Twelve 1.0
*/
function twentytwelve_admin_header_style() {
?>
<style type="text/css">
.appearance_page_custom-header #headimg {
border: none;
}
#headimg h1,
#headimg h2 {
line-height: 1.6;
margin: 0;
padding: 0;
}
#headimg h1 {
font-size: 30px;
}
#headimg h1 a {
color: #515151;
text-decoration: none;
}
#headimg h1 a:hover {
color: #21759b;
}
#headimg h2 {
color: #777;
font: normal 13px/1.8 "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", sans-serif;
margin-bottom: 24px;
}
#headimg img {
max-width: <?php echo get_theme_support( 'custom-header', 'max-width' ); ?>px;
}
</style>
<?php
}
/**
* Custom header image markup displayed on the Appearance > Header admin panel.
*
* @since Twenty Twelve 1.0
*/
function twentytwelve_admin_header_image() {
?>
<div id="headimg">
<?php
if ( ! display_header_text() )
$style = ' style="display:none;"';
else
$style = ' style="color:#' . get_header_textcolor() . ';"';
?>
<h1><a id="name"<?php echo $style; ?> onclick="return false;" href="<?php echo esc_url( home_url( '/' ) ); ?>"><?php bloginfo( 'name' ); ?></a></h1>
<h2 id="desc"<?php echo $style; ?>><?php bloginfo( 'description' ); ?></h2>
<?php $header_image = get_header_image();
if ( ! empty( $header_image ) ) : ?>
<img src="<?php echo esc_url( $header_image ); ?>" class="header-image" width="<?php echo get_custom_header()->width; ?>" height="<?php echo get_custom_header()->height; ?>" alt="" />
<?php endif; ?>
</div>
<?php }