56 lines
1.6 KiB
TypeScript
56 lines
1.6 KiB
TypeScript
|
/**
|
||
|
|
* WordPress dependencies
|
||
|
|
*/
|
||
|
|
import { useEffect, useRef } from '@wordpress/element';
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Calculates and renders the format boundary style when the active formats
|
||
|
|
* change.
|
||
|
|
*/
|
||
|
|
export function useBoundaryStyle( { record } ) {
|
||
|
|
const ref = useRef();
|
||
|
|
const { activeFormats = [], replacements, start } = record.current;
|
||
|
|
const activeReplacement = replacements[ start ];
|
||
|
|
useEffect( () => {
|
||
|
|
// There's no need to recalculate the boundary styles if no formats are
|
||
|
|
// active, because no boundary styles will be visible.
|
||
|
|
if (
|
||
|
|
( ! activeFormats || ! activeFormats.length ) &&
|
||
|
|
! activeReplacement
|
||
|
|
) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
const boundarySelector = '*[data-rich-text-format-boundary]';
|
||
|
|
const element = ref.current.querySelector( boundarySelector );
|
||
|
|
|
||
|
|
if ( ! element ) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
const { ownerDocument } = element;
|
||
|
|
const { defaultView } = ownerDocument;
|
||
|
|
const computedStyle = defaultView.getComputedStyle( element );
|
||
|
|
const newColor = computedStyle.color
|
||
|
|
.replace( ')', ', 0.2)' )
|
||
|
|
.replace( 'rgb', 'rgba' );
|
||
|
|
const selector = `.rich-text:focus ${ boundarySelector }`;
|
||
|
|
const rule = `background-color: ${ newColor }`;
|
||
|
|
const style = `${ selector } {${ rule }}`;
|
||
|
|
const globalStyleId = 'rich-text-boundary-style';
|
||
|
|
|
||
|
|
let globalStyle = ownerDocument.getElementById( globalStyleId );
|
||
|
|
|
||
|
|
if ( ! globalStyle ) {
|
||
|
|
globalStyle = ownerDocument.createElement( 'style' );
|
||
|
|
globalStyle.id = globalStyleId;
|
||
|
|
ownerDocument.head.appendChild( globalStyle );
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( globalStyle.innerHTML !== style ) {
|
||
|
|
globalStyle.innerHTML = style;
|
||
|
|
}
|
||
|
|
}, [ activeFormats, activeReplacement ] );
|
||
|
|
return ref;
|
||
|
|
}
|