141 lines
3.6 KiB
TypeScript
141 lines
3.6 KiB
TypeScript
import { createSelectorHook, createState } from "@state-designer/react"
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import { clamp, screenToWorld } from "utils/utils"
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import * as vec from "utils/vec"
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import { Data } from "types"
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import { defaultDocument } from "./data"
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import * as Sessions from "./sessions"
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const initialData: Data = {
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camera: {
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point: [0, 0],
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zoom: 1,
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},
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brush: undefined,
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pointedId: null,
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selectedIds: new Set([]),
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currentPageId: "page0",
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document: defaultDocument,
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}
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const state = createState({
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data: initialData,
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on: {
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ZOOMED_CAMERA: {
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do: "zoomCamera",
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},
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PANNED_CAMERA: {
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do: "panCamera",
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},
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},
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initial: "selecting",
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states: {
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selecting: {
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on: {
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POINTED_CANVAS: { to: "brushSelecting" },
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POINTED_SHAPE: [
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"setPointedId",
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{
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if: "isPressingShiftKey",
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then: {
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if: "isPointedShapeSelected",
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do: "pullPointedIdFromSelectedIds",
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else: "pushPointedIdToSelectedIds",
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},
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else: ["clearSelectedIds", "pushPointedIdToSelectedIds"],
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},
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],
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},
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},
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brushSelecting: {
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onEnter: [
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{ unless: "isPressingShiftKey", do: "clearSelectedIds" },
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"startBrushSession",
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],
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on: {
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MOVED_POINTER: "updateBrushSession",
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PANNED_CAMERA: "updateBrushSession",
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STOPPED_POINTING: { do: "completeSession", to: "selecting" },
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CANCELLED: { do: "cancelSession", to: "selecting" },
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},
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},
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},
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conditions: {
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isPointedShapeSelected(data) {
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return data.selectedIds.has(data.pointedId)
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},
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isPressingShiftKey(data, payload: { shiftKey: boolean }) {
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return payload.shiftKey
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},
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},
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actions: {
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cancelSession(data) {
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session.cancel(data)
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session = undefined
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},
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completeSession(data) {
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session.complete(data)
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session = undefined
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},
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startBrushSession(data, payload: { point: number[] }) {
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session = new Sessions.BrushSession(
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data,
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screenToWorld(payload.point, data)
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)
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},
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updateBrushSession(data, payload: { point: number[] }) {
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session.update(data, screenToWorld(payload.point, data))
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},
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// Selection
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setPointedId(data, payload: { id: string }) {
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data.pointedId = payload.id
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},
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clearPointedId(data) {
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data.pointedId = undefined
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},
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clearSelectedIds(data) {
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data.selectedIds.clear()
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},
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pullPointedIdFromSelectedIds(data) {
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const { selectedIds, pointedId } = data
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selectedIds.delete(pointedId)
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},
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pushPointedIdToSelectedIds(data) {
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data.selectedIds.add(data.pointedId)
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},
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// Camera
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zoomCamera(data, payload: { delta: number; point: number[] }) {
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const { camera } = data
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const p0 = screenToWorld(payload.point, data)
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camera.zoom = clamp(
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camera.zoom - (payload.delta / 100) * camera.zoom,
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0.5,
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3
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)
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const p1 = screenToWorld(payload.point, data)
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camera.point = vec.add(camera.point, vec.sub(p1, p0))
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document.documentElement.style.setProperty(
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"--camera-zoom",
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camera.zoom.toString()
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)
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},
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panCamera(data, payload: { delta: number[]; point: number[] }) {
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const { camera } = data
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data.camera.point = vec.sub(
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camera.point,
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vec.div(payload.delta, camera.zoom)
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)
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},
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},
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values: {
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selectedIds(data) {
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return new Set(data.selectedIds)
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},
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},
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})
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let session: Sessions.BaseSession
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export default state
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export const useSelector = createSelectorHook(state)
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