98 lines
2.6 KiB
TypeScript
98 lines
2.6 KiB
TypeScript
import { Bounds, Data, ShapeType } from 'types'
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import BaseSession from './base-session'
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import { getShapeUtils } from 'state/shape-utils'
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import { deepClone, getBoundsFromPoints, setToArray } from 'utils'
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import vec from 'utils/vec'
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import tld from 'utils/tld'
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export default class BrushSession extends BaseSession {
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origin: number[]
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snapshot: BrushSnapshot
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constructor(data: Data, point: number[]) {
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super(data)
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this.origin = vec.round(point)
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this.snapshot = getBrushSnapshot(data)
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}
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update = (data: Data, point: number[]): void => {
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const { origin, snapshot } = this
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const brushBounds = getBoundsFromPoints([origin, point])
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const hits = new Set<string>([])
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const selectedIds = new Set(snapshot.selectedIds)
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for (const id in snapshot.shapeHitTests) {
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if (selectedIds.has(id)) continue
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const { test, selectId } = snapshot.shapeHitTests[id]
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if (!hits.has(selectId)) {
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if (test(brushBounds)) {
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hits.add(selectId)
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// When brushing a shape, select its top group parent.
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if (!selectedIds.has(selectId)) {
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selectedIds.add(selectId)
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}
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} else if (selectedIds.has(selectId)) {
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selectedIds.delete(selectId)
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}
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}
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}
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tld.getPageState(data).selectedIds = selectedIds
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data.brush = brushBounds
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}
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cancel = (data: Data): void => {
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data.brush = undefined
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tld.setSelectedIds(data, this.snapshot.selectedIds)
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}
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complete = (data: Data): void => {
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data.brush = undefined
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}
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}
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/**
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* Get a snapshot of the current selected ids, for each shape that is
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* not already selected, the shape's id and a test to see whether the
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* brush will intersect that shape. For tests, start broad -> fine.
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*/
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// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
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export function getBrushSnapshot(data: Data) {
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const cData = data
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const { selectedIds } = tld.getPageState(cData)
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const shapesToTest = tld
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.getShapes(cData)
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.filter((shape) => shape.type !== ShapeType.Group && !shape.isHidden)
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.filter(
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(shape) => !(selectedIds.has(shape.id) || selectedIds.has(shape.parentId))
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)
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.map(deepClone)
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return {
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selectedIds: setToArray(selectedIds),
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shapeHitTests: Object.fromEntries(
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shapesToTest.map((shape) => {
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return [
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shape.id,
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{
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selectId: tld.getTopParentId(data, shape.id),
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test: (bounds: Bounds) => {
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return getShapeUtils(shape).hitTestBounds(shape, bounds)
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},
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},
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]
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})
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),
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}
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}
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export type BrushSnapshot = ReturnType<typeof getBrushSnapshot>
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