kopia lustrzana https://github.com/Tldraw/Tldraw
107 wiersze
2.6 KiB
TypeScript
107 wiersze
2.6 KiB
TypeScript
import { Data } from "types"
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import * as vec from "utils/vec"
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import BaseSession from "./base-session"
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import commands from "state/commands"
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import { current } from "immer"
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import { v4 as uuid } from "uuid"
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import { getPage, getSelectedShapes } from "utils/utils"
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export default class TranslateSession extends BaseSession {
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delta = [0, 0]
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origin: number[]
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snapshot: TranslateSnapshot
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isCloning = false
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constructor(data: Data, point: number[], isCloning = false) {
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super(data)
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this.origin = point
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this.snapshot = getTranslateSnapshot(data)
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}
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update(data: Data, point: number[], isAligned: boolean, isCloning: boolean) {
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const { currentPageId, clones, initialShapes } = this.snapshot
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const { shapes } = getPage(data, currentPageId)
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const delta = vec.vec(this.origin, point)
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if (isAligned) {
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if (Math.abs(delta[0]) < Math.abs(delta[1])) {
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delta[0] = 0
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} else {
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delta[1] = 0
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}
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}
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if (isCloning) {
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if (!this.isCloning) {
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this.isCloning = true
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data.selectedIds.clear()
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for (const { id, point } of initialShapes) {
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shapes[id].point = point
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}
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for (const clone of clones) {
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shapes[clone.id] = { ...clone }
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data.selectedIds.add(clone.id)
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}
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}
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for (const { id, point } of clones) {
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shapes[id].point = vec.add(point, delta)
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}
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} else {
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if (this.isCloning) {
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this.isCloning = false
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data.selectedIds.clear()
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for (const { id } of initialShapes) {
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data.selectedIds.add(id)
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}
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for (const clone of clones) {
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delete shapes[clone.id]
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}
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}
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for (const { id, point } of initialShapes) {
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shapes[id].point = vec.add(point, delta)
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}
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}
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}
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cancel(data: Data) {
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const { initialShapes, clones, currentPageId } = this.snapshot
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const { shapes } = getPage(data, currentPageId)
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for (const { id, point } of initialShapes) {
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shapes[id].point = point
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}
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for (const { id } of clones) {
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delete shapes[id]
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}
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}
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complete(data: Data) {
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commands.translate(
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data,
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this.snapshot,
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getTranslateSnapshot(data),
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this.isCloning
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)
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}
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}
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export function getTranslateSnapshot(data: Data) {
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const shapes = getSelectedShapes(current(data))
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return {
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currentPageId: data.currentPageId,
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initialShapes: shapes.map(({ id, point }) => ({ id, point })),
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clones: shapes.map((shape) => ({ ...shape, id: uuid() })),
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}
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}
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export type TranslateSnapshot = ReturnType<typeof getTranslateSnapshot>
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