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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | 32x 32x 8x 8x 8x 8x | import { IProjectionNode } from "./types" const notify = (node: IProjectionNode) => !node.isLayoutDirty && node.willUpdate(false) export interface NodeGroup { add: (node: IProjectionNode) => void remove: (node: IProjectionNode) => void dirty: VoidFunction } export function nodeGroup(): NodeGroup { const nodes = new Set<IProjectionNode>() const subscriptions = new WeakMap<IProjectionNode, () => void>() const dirtyAll = () => nodes.forEach(notify) return { add: (node) => { nodes.add(node) subscriptions.set( node, node.addEventListener("willUpdate", dirtyAll) ) }, remove: (node) => { nodes.delete(node) subscriptions.get(node)?.() subscriptions.delete(node) dirtyAll() }, dirty: dirtyAll, } } |