kopia lustrzana https://github.com/Tldraw/Tldraw
56 wiersze
1.5 KiB
TypeScript
56 wiersze
1.5 KiB
TypeScript
import { getShapeUtils } from 'state/shape-utils'
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import { useSelector } from 'state'
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import { Bounds, PageState } from 'types'
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import { boundsCollide, boundsContain } from 'utils/bounds'
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import { deepCompareArrays, getPage, getViewport } from 'utils/utils'
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import Shape from './shape'
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/*
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On each state change, compare node ids of all shapes
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on the current page. Kind of expensive but only happens
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here; and still cheaper than any other pattern I've found.
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*/
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const noOffset = [0, 0]
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const viewportCache = new WeakMap<PageState, Bounds>()
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export default function Page(): JSX.Element {
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const currentPageShapeIds = useSelector((s) => {
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const page = getPage(s.data)
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const pageState = s.data.pageStates[page.id]
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if (!viewportCache.has(pageState)) {
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const viewport = getViewport(s.data)
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viewportCache.set(pageState, viewport)
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}
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const viewport = viewportCache.get(pageState)
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return s.values.currentShapes
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.filter((shape) => {
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const shapeBounds = getShapeUtils(shape).getBounds(shape)
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return (
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boundsContain(viewport, shapeBounds) ||
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boundsCollide(viewport, shapeBounds)
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)
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})
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.map((shape) => shape.id)
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}, deepCompareArrays)
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const isSelecting = useSelector((s) => s.isIn('selecting'))
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return (
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<g pointerEvents={isSelecting ? 'all' : 'none'}>
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{currentPageShapeIds.map((shapeId) => (
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<Shape
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key={shapeId}
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id={shapeId}
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isSelecting={isSelecting}
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parentPoint={noOffset}
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/>
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))}
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</g>
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)
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}
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