Updates cursor logic

components/canvas/canvas.tsx

@@ -1,19 +1,18 @@
-import styled from 'styles'
 import { ErrorBoundary } from 'react-error-boundary'
-import state, { useSelector } from 'state'
-import React, { useRef } from 'react'
-import useZoomEvents from 'hooks/useZoomEvents'
-import useCamera from 'hooks/useCamera'
-import Defs from './defs'
-import Page from './page'
-import Brush from './brush'
-import Cursor from './cursor'
 import Bounds from './bounds/bounding-box'
 import BoundsBg from './bounds/bounds-bg'
-import Handles from './bounds/handles'
-import useCanvasEvents from 'hooks/useCanvasEvents'
+import Brush from './brush'
 import ContextMenu from './context-menu/context-menu'
-import { deepCompareArrays } from 'utils'
+import Coop from './coop/coop'
+import Defs from './defs'
+import Handles from './bounds/handles'
+import Page from './page'
+import React, { useRef } from 'react'
+import state, { useSelector } from 'state'
+import styled from 'styles'
+import useCamera from 'hooks/useCamera'
+import useCanvasEvents from 'hooks/useCanvasEvents'
+import useZoomEvents from 'hooks/useZoomEvents'
 
 function resetError() {
   null
@@ -40,10 +39,10 @@ export default function Canvas(): JSX.Element {
             <g ref={rGroup} id="shapes">
               <BoundsBg />
               <Page />
+              <Coop />
               <Bounds />
               <Handles />
               <Brush />
-              <Peers />
             </g>
           )}
         </ErrorBoundary>
@@ -52,32 +51,6 @@ export default function Canvas(): JSX.Element {
   )
 }
 
-function Peers(): JSX.Element {
-  const peerIds = useSelector((s) => {
-    return s.data.room ? Object.keys(s.data.room?.peers) : []
-  }, deepCompareArrays)
-
-  return (
-    <>
-      {peerIds.map((id) => (
-        <Peer key={id} id={id} />
-      ))}
-    </>
-  )
-}
-
-function Peer({ id }: { id: string }): JSX.Element {
-  const hasPeer = useSelector((s) => {
-    return s.data.room && s.data.room.peers[id] !== undefined
-  })
-
-  const point = useSelector(
-    (s) => hasPeer && s.data.room.peers[id].cursor.point
-  )
-
-  return <Cursor point={point} />
-}
-
 const MainSVG = styled('svg', {
   position: 'fixed',
   overflow: 'hidden',

components/canvas/coop/coop.tsx

@@ -0,0 +1,27 @@
+import Cursor from './cursor'
+import { useCoopSelector } from 'state/coop/coop-state'
+
+export default function Presence(): JSX.Element {
+  const others = useCoopSelector((s) => s.data.others)
+
+  return (
+    <>
+      {Object.values(others).map(({ connectionId, presence }) => {
+        if (presence == null) {
+          return null
+        }
+
+        return (
+          <Cursor
+            key={`cursor-${connectionId}`}
+            color={'red'}
+            duration={presence.duration}
+            times={presence.times}
+            bufferedXs={presence.bufferedXs}
+            bufferedYs={presence.bufferedYs}
+          />
+        )
+      })}
+    </>
+  )
+}

components/canvas/coop/cursor.tsx

@@ -1,25 +1,45 @@
 import React from 'react'
 import styled from 'styles'
+import { motion } from 'framer-motion'
+
+// const transition = {
+//   type: 'spring',
+//   mass: 2,
+//   damping: 20,
+// }
 
 export default function Cursor({
   color = 'dodgerblue',
-  point = [0, 0],
+  duration = 0,
+  bufferedXs = [],
+  bufferedYs = [],
+  times = [],
 }: {
-  color?: string
-  point: number[]
+  color: string
+  duration: number
+  bufferedXs: number[]
+  bufferedYs: number[]
+  times: number[]
 }): JSX.Element {
-  const transform = `translate(${point[0] - 12} ${point[1] - 10})`
-
   return (
     <StyledCursor
       color={color}
-      transform={transform}
+      initial={false}
+      animate={{
+        x: bufferedXs,
+        y: bufferedYs,
+        transition: {
+          type: 'tween',
+          ease: 'linear',
+          duration,
+          times,
+        },
+      }}
       width="35px"
       height="35px"
       viewBox="0 0 35 35"
       version="1.1"
       pointerEvents="none"
-      opacity="0"
       xmlns="http://www.w3.org/2000/svg"
       xmlnsXlink="http://www.w3.org/1999/xlink"
     >
@@ -43,7 +63,7 @@ export default function Cursor({
   )
 }
 
-const StyledCursor = styled('g', {
+const StyledCursor = styled(motion.g, {
   position: 'absolute',
   zIndex: 1000,
   top: 0,

components/status-bar.tsx

@@ -1,11 +1,14 @@
 import { useStateDesigner } from '@state-designer/react'
 import state from 'state'
+import { useCoopSelector } from 'state/coop/coop-state'
 import styled from 'styles'
 
 const size: any = { '@sm': 'small' }
 
 export default function StatusBar(): JSX.Element {
   const local = useStateDesigner(state)
+  const status = useCoopSelector((s) => s.data.status)
+  const others = useCoopSelector((s) => s.data.others)
 
   const active = local.active.slice(1).map((s) => {
     const states = s.split('.')
@@ -17,7 +20,8 @@ export default function StatusBar(): JSX.Element {
   return (
     <StatusBarContainer size={size}>
       <Section>
-        {active.join(' | ')} | {log} | {local.data.room?.status}
+        {active.join(' | ')} | {log} | {status} (
+        {Object.values(others).length || 0})
       </Section>
     </StatusBarContainer>
   )

hooks/useCanvasEvents.ts

@@ -31,22 +31,12 @@ export default function useCanvasEvents(
 
     if (state.isIn('draw.editing')) {
       fastDrawUpdate(info)
-      return
-    }
-
-    if (state.isIn('brushSelecting')) {
+    } else if (state.isIn('brushSelecting')) {
       fastBrushSelect(info.point)
-      return
-    }
-
-    if (state.isIn('translatingSelection')) {
+    } else if (state.isIn('translatingSelection')) {
       fastTranslate(info)
-      return
-    }
-
-    if (state.isIn('transformingSelection')) {
+    } else if (state.isIn('transformingSelection')) {
       fastTransform(info)
-      return
     }
 
     state.send('MOVED_POINTER', info)

package.json

@@ -29,6 +29,9 @@
     ]
   },
   "dependencies": {
+    "@liveblocks/client": "^0.8.1",
+    "@liveblocks/node": "^0.3.0",
+    "@liveblocks/react": "^0.8.0",
     "@monaco-editor/react": "^4.2.1",
     "@radix-ui/react-checkbox": "^0.0.16",
     "@radix-ui/react-context-menu": "^0.0.22",

pages/api/auth-liveblocks.ts

@@ -0,0 +1,48 @@
+import { authorize } from '@liveblocks/node'
+import { NextApiHandler, NextApiRequest, NextApiResponse } from 'next'
+
+const API_KEY = process.env.LIVEBLOCKS_SECRET_KEY
+
+const Auth: NextApiHandler = async (
+  req: NextApiRequest,
+  res: NextApiResponse
+) => {
+  if (!API_KEY) {
+    return res.status(403).end()
+  }
+
+  const room = req.body.room
+
+  if (room === 'example-live-cursors-avatars') {
+    const response = await authorize({
+      room,
+      secret: API_KEY,
+      userInfo: {
+        name: NAMES[Math.floor(Math.random() * NAMES.length)],
+        picture: `/assets/avatars/${Math.floor(Math.random() * 10)}.png`,
+      },
+    })
+
+    return res.status(response.status).end(response.body)
+  }
+
+  const response = await authorize({
+    room,
+    secret: API_KEY,
+  })
+
+  return res.status(response.status).end(response.body)
+}
+
+export default Auth
+
+const NAMES = [
+  'Charlie Layne',
+  'Mislav Abha',
+  'Tatum Paolo',
+  'Anjali Wanda',
+  'Jody Hekla',
+  'Emil Joyce',
+  'Jory Quispe',
+  'Quinn Elton',
+]

pages/room/[id].tsx

@@ -1,10 +1,18 @@
 import dynamic from 'next/dynamic'
 import { GetServerSideProps } from 'next'
 import { getSession } from 'next-auth/client'
+import { useEffect } from 'react'
+import coopState from 'state/coop/coop-state'
 
 const Editor = dynamic(() => import('components/editor'), { ssr: false })
 
 export default function Room({ id }: { id: string }): JSX.Element {
+  useEffect(() => {
+    return () => {
+      coopState.send('LEFT_ROOM')
+    }
+  }, [])
+
   return <Editor roomId={id} />
 }
 

public/manifest.json

@@ -32,4 +32,4 @@
   "start_url": "/",
   "display": "standalone",
   "orientation": "portrait"
-}
+}

state/coop/client-liveblocks.ts

@@ -0,0 +1,131 @@
+/* eslint-disable prefer-const */
+/* eslint-disable @typescript-eslint/no-unused-vars */
+import { Client, Room, createClient } from '@liveblocks/client'
+import coopState from './coop-state'
+import { CoopPresence } from 'types'
+import {
+  ConnectionCallback,
+  MyPresenceCallback,
+  OthersEventCallback,
+} from '@liveblocks/client/lib/cjs/types'
+import { uniqueId } from 'utils'
+
+class CoopClient {
+  id = uniqueId()
+  roomId: string
+  lastCursorEventTime = 0
+  client: Client
+  room: Room
+  bufferedXs: number[] = []
+  bufferedYs: number[] = []
+  bufferedTs: number[] = []
+
+  constructor() {
+    this.client = createClient({
+      authEndpoint: '/api/auth-liveblocks',
+    })
+  }
+
+  private handleConnectionEvent: ConnectionCallback = (status) => {
+    coopState.send('CHANGED_CONNECTION_STATUS', { status })
+  }
+
+  private handleMyPresenceEvent: MyPresenceCallback<CoopPresence> = () => {
+    null
+  }
+
+  private handleOthersEvent: OthersEventCallback<CoopPresence> = (_, event) => {
+    switch (event.type) {
+      case 'enter': {
+        coopState.send('OTHER_USER_ENTERED', event)
+        break
+      }
+      case 'leave': {
+        coopState.send('OTHER_USER_LEFT', event)
+        break
+      }
+      case 'update': {
+        coopState.send('OTHER_USER_UPDATED', event)
+        break
+      }
+      case 'reset': {
+        coopState.send('RESET_OTHER_USERS', event)
+        break
+      }
+    }
+  }
+
+  connect(roomId: string) {
+    if (this.roomId) {
+      this.client.leave(this.roomId)
+    }
+
+    this.roomId = roomId
+
+    this.room = this.client.enter(roomId, { cursor: null })
+    this.room.subscribe('connection', this.handleConnectionEvent)
+    this.room.subscribe('my-presence', this.handleMyPresenceEvent)
+    this.room.subscribe('others', this.handleOthersEvent)
+
+    coopState.send('JOINED_ROOM', { others: this.room.getOthers().toArray() })
+  }
+
+  disconnect() {
+    this.room.unsubscribe('connection', this.handleConnectionEvent)
+    this.room.unsubscribe('my-presence', this.handleMyPresenceEvent)
+    this.room.unsubscribe('others', this.handleOthersEvent)
+
+    this.client.leave(this.roomId)
+  }
+
+  reconnect() {
+    this.connect(this.roomId)
+  }
+
+  moveCursor(pageId: string, point: number[]) {
+    if (!this.room) return
+
+    const now = Date.now()
+    let elapsed = now - this.lastCursorEventTime
+
+    if (elapsed > 200) {
+      // The animation's total duration (in seconds)
+      const duration = this.bufferedTs[this.bufferedTs.length - 1]
+
+      // Normalized times (0 - 1)
+      const times = this.bufferedTs.map((t) => t / duration)
+
+      // Make sure the array includes both a 0 and a 1
+      if (times.length === 1) {
+        this.bufferedXs.unshift(this.bufferedXs[0])
+        this.bufferedYs.unshift(this.bufferedYs[0])
+        times.unshift(0)
+      }
+
+      // Send the event to the service
+      this.room.updatePresence<CoopPresence>({
+        bufferedXs: this.bufferedXs,
+        bufferedYs: this.bufferedYs,
+        times,
+        duration,
+      })
+
+      // Reset data for next update
+      this.lastCursorEventTime = now
+      this.bufferedXs = []
+      this.bufferedYs = []
+      this.bufferedTs = []
+      elapsed = 0
+    }
+
+    this.bufferedXs.push(point[0])
+    this.bufferedYs.push(point[1])
+    this.bufferedTs.push(elapsed / 1000)
+  }
+
+  clearCursor() {
+    this.room.updatePresence({ cursor: null })
+  }
+}
+
+export default new CoopClient()

state/coop/coop-state.ts

@@ -0,0 +1,64 @@
+import { createSelectorHook, createState } from '@state-designer/react'
+import { CoopPresence } from 'types'
+import { User } from '@liveblocks/client'
+import client from 'state/coop/client-liveblocks'
+
+type ConnectionState =
+  | 'closed'
+  | 'authenticating'
+  | 'unavailable'
+  | 'failed'
+  | 'open'
+  | 'connecting'
+
+const coopState = createState({
+  data: {
+    status: 'closed' as ConnectionState,
+    others: {} as Record<string, User<CoopPresence>>,
+  },
+  on: {
+    JOINED_ROOM: 'setOthers',
+    LEFT_ROOM: 'disconnectFromRoom',
+    CHANGED_CONNECTION_STATUS: 'setStatus',
+    OTHER_USER_ENTERED: 'addOtherUser',
+    OTHER_USER_LEFT: 'removeOtherUser',
+    OTHER_USER_UPDATED: 'updateOtherUser',
+    RESET_OTHER_USERS: 'resetOtherUsers',
+  },
+  actions: {
+    connectToRoom(data, payload: { id: string }) {
+      client.connect(payload.id)
+    },
+    disconnectFromRoom() {
+      client.disconnect()
+    },
+    setStatus(data, payload: { status: ConnectionState }) {
+      data.status = payload.status
+    },
+    setOthers(data, payload: { others: User<CoopPresence>[] }) {
+      const { others } = payload
+      data.others = Object.fromEntries(
+        others.map((user) => [user.connectionId, user])
+      )
+    },
+    addOtherUser(data, payload: { user: User<CoopPresence> }) {
+      const { user } = payload
+      data.others[user.connectionId] = user
+    },
+    removeOtherUser(data, payload: { user: User<CoopPresence> }) {
+      const { user } = payload
+      delete data.others[user.connectionId]
+    },
+    updateOtherUser(data, payload: { user: User<CoopPresence>; changes: any }) {
+      const { user } = payload
+      data.others[user.connectionId] = user
+    },
+    resetOtherUsers(data) {
+      data.others = {}
+    },
+  },
+})
+
+export const useCoopSelector = createSelectorHook(coopState)
+
+export default coopState

state/hacks.ts

@@ -3,6 +3,7 @@ import { deepClone, setToArray } from 'utils'
 import tld from 'utils/tld'
 import { freeze } from 'immer'
 import session from './session'
+import coopClient from 'state/coop/client-liveblocks'
 import state from './state'
 import vec from 'utils/vec'
 import * as Session from './sessions'
@@ -17,6 +18,8 @@ import * as Session from './sessions'
 export function fastDrawUpdate(info: PointerInfo): void {
   const data = { ...state.data }
 
+  coopClient.moveCursor(data.currentPageId, info.point)
+
   session.update<Session.DrawSession>(
     data,
     tld.screenToWorld(info.point, data),

state/state.ts

@@ -7,7 +7,7 @@ import history from './history'
 import storage from './storage'
 import clipboard from './clipboard'
 import * as Sessions from './sessions'
-import coopClient from './coop/client-pusher'
+import coopClient from './coop/client-liveblocks'
 import commands from './commands'
 import {
   getCommonBounds,
@@ -163,18 +163,17 @@ const state = createState({
       },
       on: {
         // Network-Related
-        // RT_LOADED_ROOM: [
-        //   'clearRoom',
-        //   { if: 'hasRoom', do: ['clearDocument', 'connectToRoom'] },
-        // ],
+        RT_LOADED_ROOM: [
+          'clearRoom',
+          { if: 'hasRoom', do: ['clearDocument', 'connectToRoom'] },
+        ],
+        RT_CHANGED_STATUS: 'setRtStatus',
+        MOVED_POINTER: { secretlyDo: 'sendRtCursorMove' },
         // RT_UNLOADED_ROOM: ['clearRoom', 'clearDocument'],
         // RT_DISCONNECTED_ROOM: ['clearRoom', 'clearDocument'],
         // RT_CREATED_SHAPE: 'addRtShape',
-        // RT_CHANGED_STATUS: 'setRtStatus',
         // RT_DELETED_SHAPE: 'deleteRtShape',
         // RT_EDITED_SHAPE: 'editRtShape',
-        // RT_MOVED_CURSOR: 'moveRtCursor',
-        // MOVED_POINTER: { secretlyDo: 'sendRtCursorMove' },
         // Client
         RESIZED_WINDOW: 'resetPageState',
         RESET_PAGE: 'resetPage',
@@ -554,7 +553,7 @@ const state = createState({
               onEnter: 'startTransformSession',
               onExit: 'completeSession',
               on: {
-                // MOVED_POINTER: 'updateTransformSession', using hacks.fastTransform
+                // MOVED_POINTER: 'updateTransformSession', (see hacks)
                 PANNED_CAMERA: 'updateTransformSession',
                 PRESSED_SHIFT_KEY: 'keyUpdateTransformSession',
                 RELEASED_SHIFT_KEY: 'keyUpdateTransformSession',
@@ -567,7 +566,7 @@ const state = createState({
               onExit: 'completeSession',
               on: {
                 STARTED_PINCHING: { to: 'pinching' },
-                MOVED_POINTER: 'updateTranslateSession',
+                // MOVED_POINTER: 'updateTranslateSession', (see hacks)
                 PANNED_CAMERA: 'updateTranslateSession',
                 PRESSED_SHIFT_KEY: 'keyUpdateTranslateSession',
                 RELEASED_SHIFT_KEY: 'keyUpdateTranslateSession',
@@ -604,7 +603,7 @@ const state = createState({
                 'startBrushSession',
               ],
               on: {
-                // MOVED_POINTER: 'updateBrushSession', using hacks.fastBrushSelect
+                // MOVED_POINTER: 'updateBrushSession',  (see hacks)
                 PANNED_CAMERA: 'updateBrushSession',
                 STOPPED_POINTING: { to: 'selecting' },
                 STARTED_PINCHING: { to: 'pinching' },
@@ -640,7 +639,7 @@ const state = createState({
         },
         pinching: {
           on: {
-            // PINCHED: { do: 'pinchCamera' }, using hacks.fastPinchCamera
+            // PINCHED: { do: 'pinchCamera' },  (see hacks)
           },
           initial: 'selectPinching',
           onExit: { secretlyDo: 'updateZoomCSS' },
@@ -701,7 +700,7 @@ const state = createState({
                     },
                     PRESSED_SHIFT: 'keyUpdateDrawSession',
                     RELEASED_SHIFT: 'keyUpdateDrawSession',
-                    // MOVED_POINTER: 'updateDrawSession',
+                    // MOVED_POINTER: 'updateDrawSession', (see hacks)
                     PANNED_CAMERA: 'updateDrawSession',
                   },
                 },
@@ -1164,23 +1163,6 @@ const state = createState({
       const point = tld.screenToWorld(payload.point, data)
       coopClient.moveCursor(data.currentPageId, point)
     },
-    moveRtCursor(
-      data,
-      payload: { id: string; pageId: string; point: number[] }
-    ) {
-      const { room } = data
-
-      if (room.peers[payload.id] === undefined) {
-        room.peers[payload.id] = {
-          id: payload.id,
-          cursor: {
-            point: payload.point,
-          },
-        }
-      }
-
-      room.peers[payload.id].cursor.point = payload.point
-    },
     clearRoom(data) {
       data.room = undefined
     },

types.ts

@@ -17,7 +17,7 @@ export interface Data {
   room?: {
     id: string
     status: string
-    peers: Record<string, Peer>
+    peers: Record<string, CoopPresence>
   }
   currentStyle: ShapeStyles
   activeTool: ShapeType | 'select'
@@ -38,11 +38,12 @@ export interface Data {
 /*                      Document                      */
 /* -------------------------------------------------- */
 
-export interface Peer {
+export type CoopPresence = {
   id: string
-  cursor: {
-    point: number[]
-  }
+  bufferedXs: number[]
+  bufferedYs: number[]
+  times: number[]
+  duration: number
 }
 
 export interface TLDocument {

utils/tld.ts

@@ -142,6 +142,7 @@ export default class ProjectUtils {
 
   /**
    * Get the next child index above a shape.
+   * TODO: Make work for grouped shapes, make faster.
    * @param data
    * @param id
    */
@@ -158,9 +159,7 @@ export default class ProjectUtils {
 
     const nextSibling = siblings[index + 1]
 
-    if (!nextSibling) {
-      return shape.childIndex + 1
-    }
+    if (!nextSibling) return shape.childIndex + 1
 
     let nextIndex = (shape.childIndex + nextSibling.childIndex) / 2
 

yarn.lock

@@ -1206,6 +1206,30 @@
     "@types/yargs" "^16.0.0"
     chalk "^4.0.0"
 
+"@liveblocks/client@0.8.0":
+  version "0.8.0"
+  resolved "https://registry.yarnpkg.com/@liveblocks/client/-/client-0.8.0.tgz#b2cd1cc197d1ada76f4083d3a9065ee9f8fa1dc4"
+  integrity sha512-p7h7ZZpkyNjC/asdzjcZOzyTjINpQkgI5zrZGT7323VLXbn9ge/a+YL83N5sUosMtbjycfGLGHNN8fpSRgl7pA==
+
+"@liveblocks/client@^0.8.1":
+  version "0.8.1"
+  resolved "https://registry.yarnpkg.com/@liveblocks/client/-/client-0.8.1.tgz#4220542c84473d71fb4032442e6a9861a5983ba3"
+  integrity sha512-+5LNtyOUA7RyxsK2uRupEZ6SzNhi1p9119fuWFrbrgP0dMabV40U7SVuvMnMxIsGzFqC+RoDQWEQ+iJFcuBVaQ==
+
+"@liveblocks/node@^0.3.0":
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/@liveblocks/node/-/node-0.3.0.tgz#f22ff0c3415502af2baf22250431852e198b12e0"
+  integrity sha512-3IJ6uN3QU71z6WXiDM97wW17fVVvrG9zMy4G4PY3zYzmeRfMnA+KBSBT1uPvlfgWm2D3d6/HNIXWxhwyv7bkfw==
+  dependencies:
+    node-fetch "^2.6.1"
+
+"@liveblocks/react@^0.8.0":
+  version "0.8.0"
+  resolved "https://registry.yarnpkg.com/@liveblocks/react/-/react-0.8.0.tgz#e538be3e0e3bcb5fe47e2f8ad5fcd2e9c379fc5d"
+  integrity sha512-eCCVOz15ldmeDIT0AB08ExQrBROeAig6EBI0hY9tUe5iehADDDSAJmrkujg0K/lwPvtvzjjrzGq1qW79x2ggkg==
+  dependencies:
+    "@liveblocks/client" "0.8.0"
+
 "@monaco-editor/loader@^1.1.1":
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/@monaco-editor/loader/-/loader-1.1.1.tgz#37db648c81a86946d0febd391de00df9c28a0a3d"