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* Remove unnecessary `@access` tags that were previously removed from core. * Remove an empty line between `@param` and `@return` tags. * Correct alignment of `@param` tags. Follow-up to [41161], [41162], [41168], [49216], [49220]. See #52628, #53461. Built from https://develop.svn.wordpress.org/trunk@51294 git-svn-id: http://core.svn.wordpress.org/trunk@50903 1a063a9b-81f0-0310-95a4-ce76da25c4cd
168 lines
4.9 KiB
PHP
168 lines
4.9 KiB
PHP
<?php
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/**
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* Custom Colors Class
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*
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* @package WordPress
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* @subpackage Twenty_Twenty_One
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* @since Twenty Twenty-One 1.0
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*/
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/**
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* This class is in charge of color customization via the Customizer.
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*/
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class Twenty_Twenty_One_Custom_Colors {
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/**
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* Instantiate the object.
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*
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* @since Twenty Twenty-One 1.0
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*/
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public function __construct() {
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// Enqueue color variables for customizer & frontend.
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add_action( 'wp_enqueue_scripts', array( $this, 'custom_color_variables' ) );
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// Enqueue color variables for editor.
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add_action( 'enqueue_block_editor_assets', array( $this, 'editor_custom_color_variables' ) );
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// Add body-class if needed.
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add_filter( 'body_class', array( $this, 'body_class' ) );
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}
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/**
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* Determine the luminance of the given color and then return #fff or #000 so that the text is always readable.
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*
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* @since Twenty Twenty-One 1.0
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*
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* @param string $background_color The background color.
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* @return string (hex color)
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*/
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public function custom_get_readable_color( $background_color ) {
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return ( 127 < self::get_relative_luminance_from_hex( $background_color ) ) ? '#000' : '#fff';
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}
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/**
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* Generate color variables.
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*
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* Adjust the color value of the CSS variables depending on the background color theme mod.
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* Both text and link colors needs to be updated.
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* The code below needs to be updated, because the colors are no longer theme mods.
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*
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* @since Twenty Twenty-One 1.0
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*
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* @param string|null $context Can be "editor" or null.
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* @return string
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*/
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public function generate_custom_color_variables( $context = null ) {
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$theme_css = 'editor' === $context ? ':root .editor-styles-wrapper{' : ':root{';
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$background_color = get_theme_mod( 'background_color', 'D1E4DD' );
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if ( 'd1e4dd' !== strtolower( $background_color ) ) {
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$theme_css .= '--global--color-background: #' . $background_color . ';';
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$theme_css .= '--global--color-primary: ' . $this->custom_get_readable_color( $background_color ) . ';';
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$theme_css .= '--global--color-secondary: ' . $this->custom_get_readable_color( $background_color ) . ';';
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$theme_css .= '--button--color-background: ' . $this->custom_get_readable_color( $background_color ) . ';';
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$theme_css .= '--button--color-text-hover: ' . $this->custom_get_readable_color( $background_color ) . ';';
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if ( '#fff' === $this->custom_get_readable_color( $background_color ) ) {
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$theme_css .= '--table--stripes-border-color: rgba(240, 240, 240, 0.15);';
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$theme_css .= '--table--stripes-background-color: rgba(240, 240, 240, 0.15);';
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}
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}
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$theme_css .= '}';
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return $theme_css;
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}
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/**
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* Customizer & frontend custom color variables.
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*
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* @since Twenty Twenty-One 1.0
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*
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* @return void
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*/
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public function custom_color_variables() {
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if ( 'd1e4dd' !== strtolower( get_theme_mod( 'background_color', 'D1E4DD' ) ) ) {
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wp_add_inline_style( 'twenty-twenty-one-style', $this->generate_custom_color_variables() );
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}
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}
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/**
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* Editor custom color variables.
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*
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* @since Twenty Twenty-One 1.0
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*
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* @return void
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*/
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public function editor_custom_color_variables() {
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wp_enqueue_style(
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'twenty-twenty-one-custom-color-overrides',
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get_theme_file_uri( 'assets/css/custom-color-overrides.css' ),
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array(),
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wp_get_theme()->get( 'Version' )
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);
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$background_color = get_theme_mod( 'background_color', 'D1E4DD' );
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if ( 'd1e4dd' !== strtolower( $background_color ) ) {
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wp_add_inline_style( 'twenty-twenty-one-custom-color-overrides', $this->generate_custom_color_variables( 'editor' ) );
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}
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}
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/**
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* Get luminance from a HEX color.
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*
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* @static
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*
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* @since Twenty Twenty-One 1.0
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*
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* @param string $hex The HEX color.
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* @return int Returns a number (0-255).
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*/
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public static function get_relative_luminance_from_hex( $hex ) {
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// Remove the "#" symbol from the beginning of the color.
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$hex = ltrim( $hex, '#' );
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// Make sure there are 6 digits for the below calculations.
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if ( 3 === strlen( $hex ) ) {
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$hex = substr( $hex, 0, 1 ) . substr( $hex, 0, 1 ) . substr( $hex, 1, 1 ) . substr( $hex, 1, 1 ) . substr( $hex, 2, 1 ) . substr( $hex, 2, 1 );
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}
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// Get red, green, blue.
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$red = hexdec( substr( $hex, 0, 2 ) );
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$green = hexdec( substr( $hex, 2, 2 ) );
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$blue = hexdec( substr( $hex, 4, 2 ) );
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// Calculate the luminance.
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$lum = ( 0.2126 * $red ) + ( 0.7152 * $green ) + ( 0.0722 * $blue );
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return (int) round( $lum );
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}
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/**
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* Adds a class to <body> if the background-color is dark.
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*
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* @since Twenty Twenty-One 1.0
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*
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* @param array $classes The existing body classes.
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* @return array
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*/
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public function body_class( $classes ) {
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$background_color = get_theme_mod( 'background_color', 'D1E4DD' );
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$luminance = self::get_relative_luminance_from_hex( $background_color );
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if ( 127 > $luminance ) {
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$classes[] = 'is-dark-theme';
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} else {
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$classes[] = 'is-light-theme';
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}
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if ( 225 <= $luminance ) {
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$classes[] = 'has-background-white';
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}
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return $classes;
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}
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}
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