WordPress/wp-content/themes/twentytwentyone/assets/js/customize-preview.js

68 lines
2.5 KiB
JavaScript

( function( api ) {
/**
* Get luminance from a HEX color.
*
* @param {string} hex - The hex color.
*
* @return {number} - Returns the luminance, number between 0 and 255.
*/
function twentytwentyoneGetHexLum( hex ) {
var rgb = twentytwentyoneGetRgbFromHex( hex );
return Math.round( ( 0.2126 * rgb.r ) + ( 0.7152 * rgb.g ) + ( 0.0722 * rgb.b ) );
}
/**
* Get RGB from HEX.
*
* @param {string} hex - The hex color.
*
* @return {Object} - Returns an object {r, g, b}
*/
function twentytwentyoneGetRgbFromHex( hex ) {
var shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i,
result;
// Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF").
hex = hex.replace( shorthandRegex, function( m, r, g, b ) {
return r.toString() + r.toString() + g.toString() + g.toString() + b.toString() + b.toString();
} );
result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec( hex );
return result ? {
r: parseInt( result[1], 16 ),
g: parseInt( result[2], 16 ),
b: parseInt( result[3], 16 )
} : null;
}
// Add listener for the "background_color" control.
api( 'background_color', function( value ) {
value.bind( function( to ) {
var lum = twentytwentyoneGetHexLum( to ),
isDark = 127 > lum,
textColor = ! isDark ? 'var(--global--color-dark-gray)' : 'var(--global--color-light-gray)',
tableColor = ! isDark ? 'var(--global--color-light-gray)' : 'var(--global--color-dark-gray)';
// Modify the body class depending on whether this is a dark background or not.
if ( isDark ) {
if ( ! document.body.classList.contains( 'is-background-dark' ) ) {
document.body.classList.add( 'is-background-dark' );
}
} else {
document.body.classList.remove( 'is-background-dark' );
}
document.documentElement.style.setProperty( '--global--color-primary', textColor );
document.documentElement.style.setProperty( '--global--color-secondary', textColor );
document.documentElement.style.setProperty( '--global--color-background', to );
document.documentElement.style.setProperty( '--button--color-background', textColor );
document.documentElement.style.setProperty( '--button--color-text', to );
document.documentElement.style.setProperty( '--button--color-text-hover', textColor );
document.documentElement.style.setProperty( '--table--stripes-border-color', tableColor );
document.documentElement.style.setProperty( '--table--stripes-background-color', tableColor );
} );
} );
}( wp.customize, _ ) );