www.gusucode.com > wordpress PHP博客系统英文版 v4.5.1PHP源码程序 > wordpress PHP博客系统英文版 v4.5.1/wordpress/wordpress/wp-content/themes/twentyfifteen/inc/custom-header.php
<?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 {
/*
* No shorthand so the Customizer can override individual properties.
* @see https://core.trac.wordpress.org/ticket/31460
*/
background-image: url(<?php header_image(); ?>);
background-repeat: no-repeat;
background-position: 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 {
/*
* No shorthand so the Customizer can override individual properties.
* @see https://core.trac.wordpress.org/ticket/31460
*/
background-image: url(<?php header_image(); ?>);
background-repeat: no-repeat;
background-position: 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 );