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import { useSortable } from '@dnd-kit/sortable';
import { CSS } from '@dnd-kit/utilities';
import { useState } from 'react';
import ResizeHandle from './resize-handle';
import type { GridLayoutItem } from './types';
export function GridItem( {
item,
maxColumns,
disabled = false,
children,
onResize,
onResizeEnd,
}: {
item: GridLayoutItem;
maxColumns: number;
disabled?: boolean;
children: React.ReactNode;
onResize: ( delta: { width: number; height: number } ) => void;
onResizeEnd: () => void;
} ) {
const [ previewDelta, setPreviewDelta ] = useState< { width: number; height: number } | null >(
null
);
const { attributes, listeners, setNodeRef, transform, transition, isDragging } = useSortable( {
id: item.key,
disabled,
} );
const dragCursor = isDragging ? 'grabbing' : 'grab';
const style = {
transform: CSS.Translate.toString( transform ),
transition,
gridColumnEnd: `span ${
item.fullWidth ? maxColumns : Math.min( item.width ?? 1, maxColumns )
}`,
gridRowEnd: `span ${ item.height || 1 }`,
cursor: disabled ? 'default' : dragCursor,
position: 'relative' as const,
zIndex: isDragging ? 2 : undefined,
};
// Inner content style with scaling effect
// The reason we need a separate "content" div is because the scaling animation
// impacts the computation done by useSortable if they're applied to the same div.
const contentStyle = {
position: 'relative' as const,
transition: 'transform 200ms ease, box-shadow 200ms ease',
transform: isDragging ? 'scale(1.05)' : undefined,
boxShadow: isDragging ? '0 5px 10px rgba(0,0,0,0.15)' : undefined,
height: '100%',
};
const handleResize = ( delta: { width: number; height: number } ) => {
setPreviewDelta( delta );
onResize( delta );
};
const handleResizeEnd = () => {
setPreviewDelta( null );
onResizeEnd();
};
// Preview overlay element (rendered directly in the GridItem)
const previewOverlay = previewDelta ? (
<div
style={ {
position: 'absolute',
top: 0,
left: 0,
right: -previewDelta.width,
bottom: -previewDelta.height,
border: '2px dashed var(--wp-admin-theme-color, #0087be)',
background: 'rgba(0, 135, 190, 0.1)',
pointerEvents: 'none',
zIndex: 1,
} }
/>
) : null;
return (
<div ref={ setNodeRef } style={ style } { ...attributes } { ...listeners }>
<div style={ contentStyle }>
{ children }
<ResizeHandle
disabled={ disabled }
itemId={ item.key }
onResize={ handleResize }
onResizeEnd={ handleResizeEnd }
/>
</div>
{ previewOverlay }
</div>
);
}
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