tldraw/components/canvas/page.tsx
Steve Ruiz d1a3860bb1 Fixes a perf-killing deepCompare in context menu
Was deep comparing an array of actual selected shapes, rather than selected shape ids
2021-06-27 10:07:20 +01:00

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import { useSelector } from 'state'
import Shape from './shape'
import usePageShapes from 'hooks/usePageShapes'
/*
On each state change, compare node ids of all shapes
on the current page. Kind of expensive but only happens
here; and still cheaper than any other pattern I've found.
*/
const noOffset = [0, 0]
export default function Page(): JSX.Element {
const currentPageShapeIds = usePageShapes()
const isSelecting = useSelector((s) => s.isIn('selecting'))
return (
<g pointerEvents={isSelecting ? 'all' : 'none'}>
{currentPageShapeIds.map((shapeId) => (
<Shape
key={shapeId}
id={shapeId}
isSelecting={isSelecting}
parentPoint={noOffset}
/>
))}
</g>
)
}