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visualizer.js
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visualizer.js
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/**
* WordPress dependencies
*/
import { useRef, useEffect, useState } from '@wordpress/element';
/**
* Internal dependencies
*/
import {
Container,
TopView,
RightView,
BottomView,
LeftView,
} from './styles/box-control-visualizer-styles';
import { DEFAULT_VALUES, DEFAULT_VISUALIZER_VALUES } from './utils';
export default function BoxControlVisualizer( {
children,
showValues = DEFAULT_VISUALIZER_VALUES,
values: valuesProp = DEFAULT_VALUES,
...props
} ) {
const isPositionAbsolute = ! children;
return (
<Container
{ ...props }
isPositionAbsolute={ isPositionAbsolute }
aria-hidden="true"
>
<Sides showValues={ showValues } values={ valuesProp } />
{ children }
</Container>
);
}
function Sides( { showValues = DEFAULT_VISUALIZER_VALUES, values } ) {
const { top, right, bottom, left } = values;
return (
<>
<Top isVisible={ showValues.top } value={ top } />
<Right isVisible={ showValues.right } value={ right } />
<Bottom isVisible={ showValues.bottom } value={ bottom } />
<Left isVisible={ showValues.left } value={ left } />
</>
);
}
function Top( { isVisible = false, value } ) {
const height = value;
const animationProps = useSideAnimation( height );
const isActive = animationProps.isActive || isVisible;
return <TopView isActive={ isActive } style={ { height } } />;
}
function Right( { isVisible = false, value } ) {
const width = value;
const animationProps = useSideAnimation( width );
const isActive = animationProps.isActive || isVisible;
return <RightView isActive={ isActive } style={ { width } } />;
}
function Bottom( { isVisible = false, value } ) {
const height = value;
const animationProps = useSideAnimation( height );
const isActive = animationProps.isActive || isVisible;
return <BottomView isActive={ isActive } style={ { height } } />;
}
function Left( { isVisible = false, value } ) {
const width = value;
const animationProps = useSideAnimation( width );
const isActive = animationProps.isActive || isVisible;
return <LeftView isActive={ isActive } style={ { width } } />;
}
/**
* Custom hook that renders the "flash" animation whenever the value changes.
*
* @param {string} value Value of (box) side.
*/
function useSideAnimation( value ) {
const [ isActive, setIsActive ] = useState( false );
const valueRef = useRef( value );
const timeoutRef = useRef();
const clearTimer = () => {
if ( timeoutRef.current ) {
window.clearTimeout( timeoutRef.current );
}
};
useEffect( () => {
if ( value !== valueRef.current ) {
setIsActive( true );
valueRef.current = value;
clearTimer();
timeoutRef.current = setTimeout( () => {
setIsActive( false );
}, 400 );
}
return () => clearTimer();
}, [ value ] );
return {
isActive,
};
}