Fix double undos, cleans up utils

__tests__/delete.test.ts

@@ -0,0 +1,31 @@
+import state from 'state'
+import inputs from 'state/inputs'
+import { getShape } from 'utils'
+import { idsAreSelected, point, rectangleId } from './test-utils'
+import * as json from './__mocks__/document.json'
+
+state.reset()
+state.send('MOUNTED').send('LOADED_FROM_FILE', { json: JSON.stringify(json) })
+
+describe('selection', () => {
+  it('deletes a shape and undoes the delete', () => {
+    state
+      .send('CANCELED')
+      .send('POINTED_SHAPE', inputs.pointerDown(point(), rectangleId))
+      .send('STOPPED_POINTING', inputs.pointerUp(point(), rectangleId))
+      .send('DELETED')
+
+    expect(getShape(state.data, rectangleId)).toBe(undefined)
+    expect(idsAreSelected(state.data, [])).toBe(true)
+
+    state.send('UNDO')
+
+    expect(getShape(state.data, rectangleId)).toBeTruthy()
+    expect(idsAreSelected(state.data, [rectangleId])).toBe(true)
+
+    state.send('REDO')
+
+    expect(getShape(state.data, rectangleId)).toBe(undefined)
+    expect(idsAreSelected(state.data, [])).toBe(true)
+  })
+})

__tests__/selection.test.ts

@@ -1,11 +1,8 @@
 import state from 'state'
 import inputs from 'state/inputs'
-import { idsAreSelected, point } from './test-utils'
+import { idsAreSelected, point, rectangleId, arrowId } from './test-utils'
 import * as json from './__mocks__/document.json'
 
-const rectangleId = '1f6c251c-e12e-40b4-8dd2-c1847d80b72f'
-const arrowId = '5ca167d7-54de-47c9-aa8f-86affa25e44d'
-
 // Mount the state and load the test file from json
 state.reset()
 state.send('MOUNTED').send('LOADED_FROM_FILE', { json: JSON.stringify(json) })

__tests__/test-utils.ts

@@ -1,6 +1,9 @@
 import { Data } from 'types'
 import { getSelectedIds } from 'utils'
 
+export const rectangleId = '1f6c251c-e12e-40b4-8dd2-c1847d80b72f'
+export const arrowId = '5ca167d7-54de-47c9-aa8f-86affa25e44d'
+
 interface PointerOptions {
   id?: string
   x?: number

components/canvas/page.tsx

@@ -1,8 +1,13 @@
 import { getShapeUtils } from 'state/shape-utils'
 import { useSelector } from 'state'
 import { Bounds, PageState } from 'types'
-import { boundsCollide, boundsContain } from 'utils/bounds'
-import { deepCompareArrays, getPage, getViewport } from 'utils'
+import {
+  deepCompareArrays,
+  getPage,
+  getViewport,
+  boundsCollide,
+  boundsContain,
+} from 'utils'
 import Shape from './shape'
 
 /* 

state/clipboard.ts

@@ -94,11 +94,11 @@ class Clipboard {
     try {
       navigator.clipboard.writeText(svgString)
     } catch (e) {
-      Clipboard.copyStringToClipboard(svgString)
+      this.copyStringToClipboard(svgString)
     }
   }
 
-  static copyStringToClipboard(string: string) {
+  copyStringToClipboard = (string: string) => {
     let result: boolean | null
 
     const textarea = document.createElement('textarea')

state/code/utils.ts

@@ -1,17 +1,10 @@
 import { Bounds } from 'types'
-import { ease } from 'utils'
 import vec from 'utils/vec'
 
 /**
  * ## Utils
  */
 export default class Utils {
-  static pointsBetween(a: number[], b: number[], steps = 6): number[][] {
-    return Array.from(Array(steps))
-      .map((_, i) => ease(i / steps))
-      .map((t) => [...vec.lrp(a, b, t), (1 - t) / 2])
-  }
-
   static getRayRayIntersection(
     p0: number[],
     n0: number[],

state/commands/align.ts

@@ -5,7 +5,6 @@ import { getCommonBounds, getPage, getSelectedShapes } from 'utils'
 import { getShapeUtils } from 'state/shape-utils'
 
 export default function alignCommand(data: Data, type: AlignType): void {
-  const { currentPageId } = data
   const selectedShapes = getSelectedShapes(data)
   const entries = selectedShapes.map(
     (shape) => [shape.id, getShapeUtils(shape).getBounds(shape)] as const
@@ -21,7 +20,7 @@ export default function alignCommand(data: Data, type: AlignType): void {
       name: 'aligned',
       category: 'canvas',
       do(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         switch (type) {
           case AlignType.Top: {
@@ -87,7 +86,7 @@ export default function alignCommand(data: Data, type: AlignType): void {
         }
       },
       undo(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
         for (const id in boundsForShapes) {
           const shape = shapes[id]
           const initialBounds = boundsForShapes[id]

state/commands/arrow.ts

@@ -18,9 +18,9 @@ export default function arrowCommand(
       do(data, isInitial) {
         if (isInitial) return
 
-        const { initialShape, currentPageId } = after
+        const { initialShape } = after
 
-        const page = getPage(data, currentPageId)
+        const page = getPage(data)
 
         page.shapes[initialShape.id] = initialShape
 
@@ -31,8 +31,8 @@ export default function arrowCommand(
         data.pointedId = undefined
       },
       undo(data) {
-        const { initialShape, currentPageId } = before
-        const shapes = getPage(data, currentPageId).shapes
+        const { initialShape } = before
+        const shapes = getPage(data).shapes
 
         delete shapes[initialShape.id]
 

state/commands/create-page.ts

@@ -2,7 +2,6 @@ import Command from './command'
 import history from '../history'
 import { Data, Page, PageState } from 'types'
 import { uniqueId } from 'utils'
-import { current } from 'immer'
 import storage from 'state/storage'
 
 export default function createPage(data: Data, goToPage = true): void {
@@ -40,7 +39,7 @@ export default function createPage(data: Data, goToPage = true): void {
 }
 
 function getSnapshot(data: Data) {
-  const { currentPageId } = current(data)
+  const { currentPageId } = data
 
   const pages = Object.values(data.document.pages)
   const unchanged = pages.filter((page) => page.name.startsWith('Page '))

state/commands/delete-page.ts

@@ -1,8 +1,8 @@
 import Command from './command'
 import history from '../history'
 import { Data } from 'types'
-import { current } from 'immer'
 import storage from 'state/storage'
+import { deepClone, getPage, getPageState } from 'utils'
 
 export default function deletePage(data: Data, pageId: string): void {
   const snapshot = getSnapshot(data, pageId)
@@ -29,23 +29,17 @@ export default function deletePage(data: Data, pageId: string): void {
 }
 
 function getSnapshot(data: Data, pageId: string) {
-  const cData = current(data)
-  const { currentPageId, document } = cData
+  const { currentPageId, document } = data
 
-  const page = document.pages[pageId]
-  const pageState = cData.pageStates[pageId]
+  const page = deepClone(getPage(data))
 
-  const isCurrent = currentPageId === pageId
+  const pageState = deepClone(getPageState(data))
 
-  // const nextIndex = isCurrent
-  //   ? page.childIndex === 0
-  //     ? 1
-  //     : page.childIndex - 1
-  //   : document.pages[currentPageId].childIndex
+  const isCurrent = data.currentPageId === pageId
 
   const nextPageId = isCurrent
     ? Object.values(document.pages).filter((page) => page.id !== pageId)[0]?.id // TODO: should be at nextIndex
-    : cData.currentPageId
+    : currentPageId
 
   return {
     nextPageId,

state/commands/delete-selected.ts

@@ -2,28 +2,26 @@ import Command from './command'
 import history from '../history'
 import { Data } from 'types'
 import {
+  deepClone,
   getDocumentBranch,
   getPage,
   getSelectedShapes,
   setSelectedIds,
 } from 'utils'
-import { current } from 'immer'
 import { getShapeUtils } from 'state/shape-utils'
 
 export default function deleteSelected(data: Data): void {
-  const { currentPageId } = data
-
   const selectedShapes = getSelectedShapes(data)
 
   const selectedIdsArr = selectedShapes
     .filter((shape) => !shape.isLocked)
     .map((shape) => shape.id)
 
-  const page = getPage(current(data))
+  const page = getPage(data)
 
   const childrenToDelete = selectedIdsArr
     .flatMap((id) => getDocumentBranch(data, id))
-    .map((id) => page.shapes[id])
+    .map((id) => deepClone(page.shapes[id]))
 
   const remainingIds = selectedShapes
     .filter((shape) => shape.isLocked)
@@ -36,7 +34,7 @@ export default function deleteSelected(data: Data): void {
       category: 'canvas',
       manualSelection: true,
       do(data) {
-        const page = getPage(data, currentPageId)
+        const page = getPage(data)
 
         for (const id of selectedIdsArr) {
           const shape = page.shapes[id]
@@ -67,7 +65,7 @@ export default function deleteSelected(data: Data): void {
         setSelectedIds(data, remainingIds)
       },
       undo(data) {
-        const page = getPage(data, currentPageId)
+        const page = getPage(data)
 
         for (const shape of childrenToDelete) {
           page.shapes[shape.id] = shape

state/commands/direct.ts

@@ -24,7 +24,7 @@ export default function directCommand(
         }
       },
       undo(data) {
-        const { shapes } = getPage(data, before.currentPageId)
+        const { shapes } = getPage(data)
 
         for (const { id, direction } of after.shapes) {
           const shape = shapes[id] as RayShape | LineShape

state/commands/distribute.ts

@@ -13,8 +13,6 @@ export default function distributeCommand(
   data: Data,
   type: DistributeType
 ): void {
-  const { currentPageId } = data
-
   const selectedShapes = getSelectedShapes(data).filter(
     (shape) => !shape.isLocked
   )
@@ -40,7 +38,7 @@ export default function distributeCommand(
       name: 'distribute_shapes',
       category: 'canvas',
       do(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
         const len = entries.length
 
         switch (type) {
@@ -132,7 +130,7 @@ export default function distributeCommand(
         }
       },
       undo(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
         for (const id in boundsForShapes) {
           const shape = shapes[id]
           const initialBounds = boundsForShapes[id]

state/commands/draw.ts

@@ -1,11 +1,10 @@
 import Command from './command'
 import history from '../history'
 import { Data, DrawShape } from 'types'
-import { getPage, setSelectedIds } from 'utils'
-import { current } from 'immer'
+import { deepClone, getPage, getShape, setSelectedIds } from 'utils'
 
 export default function drawCommand(data: Data, id: string): void {
-  const restoreShape = getPage(current(data)).shapes[id] as DrawShape
+  const restoreShape = deepClone(getShape(data, id)) as DrawShape
 
   history.execute(
     data,

state/commands/duplicate.ts

@@ -2,18 +2,18 @@ import Command from './command'
 import history from '../history'
 import { Data } from 'types'
 import {
+  deepClone,
   getCurrentCamera,
   getPage,
   getSelectedShapes,
   setSelectedIds,
 } from 'utils'
 import { uniqueId } from 'utils'
-import { current } from 'immer'
 import vec from 'utils/vec'
 
 export default function duplicateCommand(data: Data): void {
-  const { currentPageId } = data
-  const selectedShapes = getSelectedShapes(current(data))
+  const selectedShapes = getSelectedShapes(data).map(deepClone)
+
   const duplicates = selectedShapes.map((shape) => ({
     ...shape,
     id: uniqueId(),
@@ -28,7 +28,7 @@ export default function duplicateCommand(data: Data): void {
       category: 'canvas',
       manualSelection: true,
       do(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         for (const duplicate of duplicates) {
           shapes[duplicate.id] = duplicate
@@ -40,7 +40,7 @@ export default function duplicateCommand(data: Data): void {
         )
       },
       undo(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         for (const duplicate of duplicates) {
           delete shapes[duplicate.id]

state/commands/edit.ts

@@ -16,9 +16,9 @@ export default function editCommand(
       name: 'edit_shape',
       category: 'canvas',
       do(data) {
-        const { initialShape, currentPageId } = after
+        const { initialShape } = after
 
-        const page = getPage(data, currentPageId)
+        const page = getPage(data)
 
         page.shapes[initialShape.id] = initialShape
 
@@ -29,9 +29,9 @@ export default function editCommand(
         }
       },
       undo(data) {
-        const { initialShape, currentPageId } = before
+        const { initialShape } = before
 
-        const page = getPage(data, currentPageId)
+        const page = getPage(data)
 
         page.shapes[initialShape.id] = initialShape
       },

state/commands/generate.ts

@@ -1,34 +1,15 @@
 import Command from './command'
 import history from '../history'
 import { Data, Shape } from 'types'
-import { current } from 'immer'
-import { getPage, setSelectedIds } from 'utils'
+import { deepClone, getPage, getShapes, setSelectedIds } from 'utils'
 
 export default function generateCommand(
   data: Data,
-  currentPageId: string,
   generatedShapes: Shape[]
 ): void {
-  const cData = current(data)
-  const page = getPage(cData)
-
-  const currentShapes = page.shapes
-
-  const prevGeneratedShapes = Object.values(currentShapes).filter(
-    (shape) => shape.isGenerated
-  )
-
-  // Remove previous generated shapes
-  for (const id in currentShapes) {
-    if (currentShapes[id].isGenerated) {
-      delete currentShapes[id]
-    }
-  }
-
-  // Add new ones
-  for (const shape of generatedShapes) {
-    currentShapes[shape.id] = shape
-  }
+  const initialShapes = getShapes(data)
+    .filter((shape) => shape.isGenerated)
+    .map(deepClone)
 
   history.execute(
     data,
@@ -37,35 +18,15 @@ export default function generateCommand(
       category: 'canvas',
       do(data) {
         const { shapes } = getPage(data)
-
+        initialShapes.forEach((shape) => delete shapes[shape.id])
+        generatedShapes.forEach((shape) => (shapes[shape.id] = shape))
         setSelectedIds(data, [])
-
-        // Remove previous generated shapes
-        for (const id in shapes) {
-          if (shapes[id].isGenerated) {
-            delete shapes[id]
-          }
-        }
-
-        // Add new generated shapes
-        for (const shape of generatedShapes) {
-          shapes[shape.id] = shape
-        }
       },
       undo(data) {
         const { shapes } = getPage(data)
-
-        // Remove generated shapes
-        for (const id in shapes) {
-          if (shapes[id].isGenerated) {
-            delete shapes[id]
-          }
-        }
-
-        // Restore previous generated shapes
-        for (const shape of prevGeneratedShapes) {
-          shapes[shape.id] = shape
-        }
+        generatedShapes.forEach((shape) => delete shapes[shape.id])
+        initialShapes.forEach((shape) => (shapes[shape.id] = shape))
+        setSelectedIds(data, [])
       },
     })
   )

state/commands/group.ts

@@ -82,7 +82,7 @@ export default function groupCommand(data: Data): void {
       category: 'canvas',
       manualSelection: true,
       do(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         // Create the new group
         shapes[newGroupShape.id] = newGroupShape
@@ -118,7 +118,7 @@ export default function groupCommand(data: Data): void {
         setSelectedIds(data, [newGroupShape.id])
       },
       undo(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         const group = shapes[newGroupShape.id]
 

state/commands/handle.ts

@@ -16,9 +16,9 @@ export default function handleCommand(
       name: 'moved_handle',
       category: 'canvas',
       do(data) {
-        const { initialShape, currentPageId } = after
+        const { initialShape } = after
 
-        const page = getPage(data, currentPageId)
+        const page = getPage(data)
         const shape = page.shapes[initialShape.id]
 
         getShapeUtils(shape)
@@ -26,9 +26,9 @@ export default function handleCommand(
           .onSessionComplete(shape)
       },
       undo(data) {
-        const { initialShape, currentPageId } = before
+        const { initialShape } = before
 
-        const page = getPage(data, currentPageId)
+        const page = getPage(data)
         page.shapes[initialShape.id] = initialShape
       },
     })

state/commands/move-to-page.ts

@@ -39,7 +39,7 @@ export default function moveToPageCommand(data: Data, newPageId: string): void {
         const fromPageId = oldPageId
         const toPageId = newPageId
 
-        const fromPage = getPage(data, fromPageId)
+        const fromPage = getPage(data)
 
         // Get all of the selected shapes and their descendents
         const shapesToMove = idsToMove.map((id) => fromPage.shapes[id])
@@ -65,7 +65,7 @@ export default function moveToPageCommand(data: Data, newPageId: string): void {
         })
 
         // Clear the current page state's selected ids
-        getPageState(data, fromPageId).selectedIds.clear()
+        getPageState(data).selectedIds.clear()
 
         // Save the "from" page
         storage.savePage(data, data.document.id, fromPageId)
@@ -74,7 +74,7 @@ export default function moveToPageCommand(data: Data, newPageId: string): void {
         storage.loadPage(data, toPageId)
 
         // The page we're moving the shapes to
-        const toPage = getPage(data, toPageId)
+        const toPage = getPage(data)
 
         // Add all of the selected shapes to the "from" page.
         shapesToMove.forEach((shape) => {
@@ -89,7 +89,7 @@ export default function moveToPageCommand(data: Data, newPageId: string): void {
         })
 
         // Select the selected ids on the new page
-        getPageState(data, toPageId).selectedIds = new Set(selectedIds)
+        getPageState(data).selectedIds = new Set(selectedIds)
 
         // Move to the new page
         data.currentPageId = toPageId
@@ -98,7 +98,7 @@ export default function moveToPageCommand(data: Data, newPageId: string): void {
         const fromPageId = newPageId
         const toPageId = oldPageId
 
-        const fromPage = getPage(data, fromPageId)
+        const fromPage = getPage(data)
 
         const shapesToMove = idsToMove.map((id) => fromPage.shapes[id])
 
@@ -119,13 +119,13 @@ export default function moveToPageCommand(data: Data, newPageId: string): void {
           delete fromPage.shapes[shape.id]
         })
 
-        getPageState(data, fromPageId).selectedIds.clear()
+        getPageState(data).selectedIds.clear()
 
         storage.savePage(data, data.document.id, fromPageId)
 
         storage.loadPage(data, toPageId)
 
-        const toPage = getPage(data, toPageId)
+        const toPage = getPage(data)
 
         shapesToMove.forEach((shape) => {
           toPage.shapes[shape.id] = shape
@@ -144,7 +144,7 @@ export default function moveToPageCommand(data: Data, newPageId: string): void {
           }
         })
 
-        getPageState(data, toPageId).selectedIds = new Set(selectedIds)
+        getPageState(data).selectedIds = new Set(selectedIds)
 
         data.currentPageId = toPageId
       },

state/commands/move.ts

@@ -11,8 +11,6 @@ import {
 import { getShapeUtils } from 'state/shape-utils'
 
 export default function moveCommand(data: Data, type: MoveType): void {
-  const { currentPageId } = data
-
   const page = getPage(data)
 
   const selectedIds = setToArray(getSelectedIds(data))
@@ -28,7 +26,7 @@ export default function moveCommand(data: Data, type: MoveType): void {
       category: 'canvas',
       manualSelection: true,
       do(data) {
-        const page = getPage(data, currentPageId)
+        const page = getPage(data)
 
         const shapes = selectedIds.map((id) => page.shapes[id])
 

state/commands/nudge.ts

@@ -6,7 +6,6 @@ import { getShapeUtils } from 'state/shape-utils'
 import vec from 'utils/vec'
 
 export default function nudgeCommand(data: Data, delta: number[]): void {
-  const { currentPageId } = data
   const selectedShapes = getSelectedShapes(data)
   const shapeBounds = Object.fromEntries(
     selectedShapes.map(
@@ -20,7 +19,7 @@ export default function nudgeCommand(data: Data, delta: number[]): void {
       name: 'nudge_shapes',
       category: 'canvas',
       do(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         for (const id in shapeBounds) {
           const shape = shapes[id]
@@ -32,7 +31,7 @@ export default function nudgeCommand(data: Data, delta: number[]): void {
         }
       },
       undo(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         for (const id in shapeBounds) {
           const shape = shapes[id]

state/commands/paste.ts

@@ -15,8 +15,6 @@ import { getShapeUtils } from 'state/shape-utils'
 import state from 'state/state'
 
 export default function pasteCommand(data: Data, initialShapes: Shape[]): void {
-  const { currentPageId } = data
-
   const center = screenToWorld(
     [window.innerWidth / 2, window.innerHeight / 2],
     data
@@ -43,7 +41,7 @@ export default function pasteCommand(data: Data, initialShapes: Shape[]): void {
       category: 'canvas',
       manualSelection: true,
       do(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         let childIndex =
           (state.values.currentShapes[state.values.currentShapes.length - 1]
@@ -67,7 +65,7 @@ export default function pasteCommand(data: Data, initialShapes: Shape[]): void {
         setSelectedIds(data, Object.values(newIdMap))
       },
       undo(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         Object.values(newIdMap).forEach((id) => delete shapes[id])
 

state/commands/rotate-ccw.ts

@@ -13,7 +13,7 @@ import { getShapeUtils } from 'state/shape-utils'
 const PI2 = Math.PI * 2
 
 export default function rotateCcwCommand(data: Data): void {
-  const { currentPageId, boundsRotation } = data
+  const { boundsRotation } = data
 
   const page = getPage(data)
 
@@ -63,7 +63,7 @@ export default function rotateCcwCommand(data: Data): void {
       name: 'rotate_ccw',
       category: 'canvas',
       do(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         for (const id in nextShapes) {
           const shape = shapes[id]
@@ -77,7 +77,7 @@ export default function rotateCcwCommand(data: Data): void {
         data.boundsRotation = nextboundsRotation
       },
       undo(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         for (const id in initialShapes) {
           const { point, rotation } = initialShapes[id]

state/commands/rotate.ts

@@ -29,7 +29,7 @@ export default function rotateCommand(
         data.boundsRotation = after.boundsRotation
       },
       undo(data) {
-        const { shapes } = getPage(data, before.currentPageId)
+        const { shapes } = getPage(data)
 
         for (const { id, point, rotation } of before.initialShapes) {
           const shape = shapes[id]

state/commands/stretch.ts

@@ -5,8 +5,6 @@ import { deepClone, getCommonBounds, getPage, getSelectedShapes } from 'utils'
 import { getShapeUtils } from 'state/shape-utils'
 
 export default function stretchCommand(data: Data, type: StretchType): void {
-  const { currentPageId } = data
-
   const initialShapes = getSelectedShapes(data).map((shape) => deepClone(shape))
 
   const snapshot = Object.fromEntries(
@@ -29,7 +27,7 @@ export default function stretchCommand(data: Data, type: StretchType): void {
       name: 'stretched_shapes',
       category: 'canvas',
       do(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         switch (type) {
           case StretchType.Horizontal: {
@@ -77,7 +75,7 @@ export default function stretchCommand(data: Data, type: StretchType): void {
         }
       },
       undo(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
         initialShapes.forEach((shape) => (shapes[shape.id] = shape))
       },
     })

state/commands/style.ts

@@ -11,7 +11,6 @@ export default function styleCommand(
 ): void {
   const cData = current(data)
   const page = getPage(cData)
-  const { currentPageId } = cData
 
   const selectedIds = setToArray(getSelectedIds(data))
 
@@ -26,7 +25,7 @@ export default function styleCommand(
       category: 'canvas',
       manualSelection: true,
       do(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         for (const { id } of shapesToStyle) {
           const shape = shapes[id]
@@ -34,7 +33,7 @@ export default function styleCommand(
         }
       },
       undo(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         for (const { id, style } of shapesToStyle) {
           const shape = shapes[id]

state/commands/toggle.ts

@@ -9,7 +9,6 @@ export default function toggleCommand(
   data: Data,
   prop: PropsOfType<Shape>
 ): void {
-  const { currentPageId } = data
   const selectedShapes = getSelectedShapes(data)
   const isAllToggled = selectedShapes.every((shape) => shape[prop])
   const initialShapes = Object.fromEntries(
@@ -22,7 +21,7 @@ export default function toggleCommand(
       name: 'toggle_prop',
       category: 'canvas',
       do(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         for (const id in initialShapes) {
           const shape = shapes[id]
@@ -34,7 +33,7 @@ export default function toggleCommand(
         }
       },
       undo(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         for (const id in initialShapes) {
           const shape = shapes[id]

state/commands/transform-single.ts

@@ -11,7 +11,7 @@ export default function transformSingleCommand(
   after: TransformSingleSnapshot,
   isCreating: boolean
 ): void {
-  const shape = current(getPage(data, after.currentPageId).shapes[after.id])
+  const shape = current(getPage(data).shapes[after.id])
 
   history.execute(
     data,
@@ -22,7 +22,7 @@ export default function transformSingleCommand(
       do(data) {
         const { id } = after
 
-        const { shapes } = getPage(data, after.currentPageId)
+        const { shapes } = getPage(data)
 
         setSelectedIds(data, [id])
 
@@ -33,7 +33,7 @@ export default function transformSingleCommand(
       undo(data) {
         const { id, initialShape } = before
 
-        const { shapes } = getPage(data, before.currentPageId)
+        const { shapes } = getPage(data)
 
         if (isCreating) {
           setSelectedIds(data, [])

state/commands/translate.ts

@@ -25,8 +25,8 @@ export default function translateCommand(
       do(data, initial) {
         if (initial) return
 
-        const { initialShapes, currentPageId } = after
-        const { shapes } = getPage(data, currentPageId)
+        const { initialShapes } = after
+        const { shapes } = getPage(data)
 
         // Restore clones to document
         if (isCloning) {
@@ -66,8 +66,8 @@ export default function translateCommand(
         )
       },
       undo(data) {
-        const { initialShapes, clones, currentPageId, initialParents } = before
-        const { shapes } = getPage(data, currentPageId)
+        const { initialShapes, clones, initialParents } = before
+        const { shapes } = getPage(data)
 
         // Move shapes back to where they started
         for (const { id, point } of initialShapes) {

state/commands/ungroup.ts

@@ -68,7 +68,7 @@ export default function ungroupCommand(data: Data): void {
         }
       },
       undo(data) {
-        const { shapes } = getPage(data, currentPageId)
+        const { shapes } = getPage(data)
 
         selectedGroups.forEach((group) => {
           shapes[group.id] = group

state/sessions/direction-session.ts

@@ -29,7 +29,7 @@ export default class DirectionSession extends BaseSession {
   }
 
   cancel(data: Data): void {
-    const page = getPage(data, this.snapshot.currentPageId)
+    const page = getPage(data)
 
     for (const { id, direction } of this.snapshot.shapes) {
       const shape = page.shapes[id] as RayShape | LineShape

state/sessions/handle-session.ts

@@ -18,8 +18,8 @@ export default class HandleSession extends BaseSession {
   }
 
   update(data: Data, point: number[], isAligned: boolean): void {
-    const { currentPageId, handleId, initialShape } = this.snapshot
-    const shape = getPage(data, currentPageId).shapes[initialShape.id]
+    const { handleId, initialShape } = this.snapshot
+    const shape = getPage(data).shapes[initialShape.id]
 
     const delta = vec.vec(this.origin, point)
 
@@ -46,8 +46,8 @@ export default class HandleSession extends BaseSession {
   }
 
   cancel(data: Data): void {
-    const { currentPageId, initialShape } = this.snapshot
-    getPage(data, currentPageId).shapes[initialShape.id] = initialShape
+    const { initialShape } = this.snapshot
+    getPage(data).shapes[initialShape.id] = initialShape
   }
 
   complete(data: Data): void {

state/sessions/rotate-session.ts

@@ -76,8 +76,8 @@ export default class RotateSession extends BaseSession {
   }
 
   cancel(data: Data): void {
-    const { currentPageId, initialShapes } = this.snapshot
-    const page = getPage(data, currentPageId)
+    const { initialShapes } = this.snapshot
+    const page = getPage(data)
 
     for (const { id, point, rotation } of initialShapes) {
       const shape = page.shapes[id]

state/sessions/transform-session.ts

@@ -80,9 +80,9 @@ export default class TransformSession extends BaseSession {
   }
 
   cancel(data: Data): void {
-    const { currentPageId, shapeBounds } = this.snapshot
+    const { shapeBounds } = this.snapshot
 
-    const { shapes } = getPage(data, currentPageId)
+    const { shapes } = getPage(data)
 
     for (const id in shapeBounds) {
       const shape = shapes[id]

state/sessions/transform-single-session.ts

@@ -36,10 +36,9 @@ export default class TransformSingleSession extends BaseSession {
   update(data: Data, point: number[], isAspectRatioLocked = false): void {
     const { transformType } = this
 
-    const { initialShapeBounds, currentPageId, initialShape, id } =
-      this.snapshot
+    const { initialShapeBounds, initialShape, id } = this.snapshot
 
-    const shape = getShape(data, id, currentPageId)
+    const shape = getShape(data, id)
 
     const newBoundingBox = getTransformedBoundingBox(
       initialShapeBounds,

state/sessions/translate-session.ts

@@ -33,9 +33,8 @@ export default class TranslateSession extends BaseSession {
     isAligned: boolean,
     isCloning: boolean
   ): void {
-    const { currentPageId, clones, initialShapes, initialParents } =
-      this.snapshot
-    const { shapes } = getPage(data, currentPageId)
+    const { clones, initialShapes, initialParents } = this.snapshot
+    const { shapes } = getPage(data)
 
     const delta = vec.vec(this.origin, point)
 
@@ -143,9 +142,8 @@ export default class TranslateSession extends BaseSession {
   }
 
   cancel(data: Data): void {
-    const { initialShapes, initialParents, clones, currentPageId } =
-      this.snapshot
-    const { shapes } = getPage(data, currentPageId)
+    const { initialShapes, initialParents, clones } = this.snapshot
+    const { shapes } = getPage(data)
 
     for (const { id } of initialShapes) {
       getDocumentBranch(data, id).forEach((id) => {

state/shape-utils/arrow.tsx

@@ -5,7 +5,8 @@ import {
   rng,
   getBoundsFromPoints,
   translateBounds,
-  pointsBetween,
+  pointInBounds,
+  pointInCircle,
 } from 'utils'
 import {
   ArrowShape,
@@ -15,12 +16,10 @@ import {
   ShapeType,
 } from 'types'
 import { circleFromThreePoints, isAngleBetween } from 'utils'
-import { pointInBounds } from 'utils/hitTests'
 import {
   intersectArcBounds,
   intersectLineSegmentBounds,
 } from 'utils/intersections'
-import { pointInCircle } from 'utils/hitTests'
 import { defaultStyle, getShapeStyle } from 'state/shape-styles'
 import getStroke from 'perfect-freehand'
 import React from 'react'
@@ -502,8 +501,8 @@ function renderFreehandArrowShaft(shape: ArrowShape) {
 
   const stroke = getStroke(
     [
-      ...pointsBetween(start.point, m),
-      ...pointsBetween(m, end.point),
+      ...vec.pointsBetween(start.point, m),
+      ...vec.pointsBetween(m, end.point),
       end.point,
       end.point,
       end.point,

state/shape-utils/dot.tsx

@@ -1,8 +1,7 @@
 import { uniqueId } from 'utils'
 import { DotShape, ShapeType } from 'types'
-import { boundsContained } from 'utils/bounds'
 import { intersectCircleBounds } from 'utils/intersections'
-import { translateBounds } from 'utils'
+import { boundsContained, translateBounds } from 'utils'
 import { defaultStyle } from 'state/shape-styles'
 import { registerShapeUtils } from './register'
 

state/shape-utils/draw.tsx

@@ -2,13 +2,13 @@ import { uniqueId } from 'utils'
 import vec from 'utils/vec'
 import { DashStyle, DrawShape, ShapeStyles, ShapeType } from 'types'
 import { intersectPolylineBounds } from 'utils/intersections'
-import { boundsContain } from 'utils/bounds'
 import getStroke, { getStrokePoints } from 'perfect-freehand'
 import {
   getBoundsCenter,
   getBoundsFromPoints,
   getSvgPathFromStroke,
   translateBounds,
+  boundsContain,
 } from 'utils'
 import { defaultStyle, getShapeStyle } from 'state/shape-styles'
 import { registerShapeUtils } from './register'

state/shape-utils/ellipse.tsx

@@ -2,15 +2,15 @@ import { getPerfectDashProps } from 'utils/dashes'
 import vec from 'utils/vec'
 import { DashStyle, EllipseShape, ShapeType } from 'types'
 import { getShapeUtils } from './index'
-import { boundsContained, getRotatedEllipseBounds } from 'utils/bounds'
 import { intersectEllipseBounds } from 'utils/intersections'
-import { pointInEllipse } from 'utils/hitTests'
 import {
   uniqueId,
-  ease,
   getSvgPathFromStroke,
   rng,
   translateBounds,
+  pointInEllipse,
+  boundsContained,
+  getRotatedEllipseBounds,
 } from 'utils'
 import { defaultStyle, getShapeStyle } from 'state/shape-styles'
 import getStroke from 'perfect-freehand'
@@ -207,7 +207,8 @@ function renderPath(shape: EllipseShape) {
   }
 
   for (let i = 5; i < 32; i++) {
-    const rads = start + overlap * 2 + Math.PI * 2.5 * ease(i / 35)
+    const t = i / 35
+    const rads = start + overlap * 2 + Math.PI * 2.5 * (t * t * t)
     const x = rx * Math.cos(rads) + center[0]
     const y = ry * Math.sin(rads) + center[1]
     points.push([x, y])

state/shape-utils/line.tsx

@@ -1,10 +1,9 @@
 import { uniqueId } from 'utils'
 import vec from 'utils/vec'
 import { LineShape, ShapeType } from 'types'
-import { boundsContained } from 'utils/bounds'
 import { intersectCircleBounds } from 'utils/intersections'
 import { ThinLine } from 'components/canvas/misc'
-import { translateBounds } from 'utils'
+import { translateBounds, boundsContained } from 'utils'
 import { defaultStyle } from 'state/shape-styles'
 import { registerShapeUtils } from './register'
 

state/shape-utils/polyline.tsx

@@ -2,8 +2,11 @@ import { uniqueId } from 'utils'
 import vec from 'utils/vec'
 import { PolylineShape, ShapeType } from 'types'
 import { intersectPolylineBounds } from 'utils/intersections'
-import { boundsContainPolygon } from 'utils/bounds'
-import { getBoundsFromPoints, translateBounds } from 'utils'
+import {
+  boundsContainPolygon,
+  getBoundsFromPoints,
+  translateBounds,
+} from 'utils'
 import { defaultStyle } from 'state/shape-styles'
 import { registerShapeUtils } from './register'
 

state/shape-utils/ray.tsx

@@ -1,10 +1,9 @@
 import { uniqueId } from 'utils'
 import vec from 'utils/vec'
 import { RayShape, ShapeType } from 'types'
-import { boundsContained } from 'utils/bounds'
 import { intersectCircleBounds } from 'utils/intersections'
 import { ThinLine } from 'components/canvas/misc'
-import { translateBounds } from 'utils'
+import { translateBounds, boundsContained } from 'utils'
 import { defaultStyle } from 'state/shape-styles'
 import { registerShapeUtils } from './register'
 

state/shape-utils/rectangle.tsx

@@ -1,13 +1,7 @@
 import { uniqueId } from 'utils'
 import vec from 'utils/vec'
 import { DashStyle, RectangleShape, ShapeType } from 'types'
-import {
-  getSvgPathFromStroke,
-  translateBounds,
-  rng,
-  shuffleArr,
-  pointsBetween,
-} from 'utils'
+import { getSvgPathFromStroke, translateBounds, rng, shuffleArr } from 'utils'
 import { defaultStyle, getShapeStyle } from 'state/shape-styles'
 import getStroke from 'perfect-freehand'
 import { registerShapeUtils } from './register'
@@ -203,10 +197,10 @@ function renderPath(shape: RectangleShape) {
 
   const lines = shuffleArr(
     [
-      pointsBetween(tr, br),
-      pointsBetween(br, bl),
-      pointsBetween(bl, tl),
-      pointsBetween(tl, tr),
+      vec.pointsBetween(tr, br),
+      vec.pointsBetween(br, bl),
+      vec.pointsBetween(bl, tl),
+      vec.pointsBetween(tl, tr),
     ],
     Math.floor(5 + getRandom() * 4)
   )

state/shape-utils/register.tsx

@@ -1,10 +1,15 @@
 import { Shape, ShapeUtility } from 'types'
 import vec from 'utils/vec'
-import { getBoundsCenter, getBoundsFromPoints, getRotatedCorners } from 'utils'
-import { boundsCollidePolygon, boundsContainPolygon } from 'utils/bounds'
+import {
+  pointInBounds,
+  getBoundsCenter,
+  getBoundsFromPoints,
+  getRotatedCorners,
+  boundsCollidePolygon,
+  boundsContainPolygon,
+} from 'utils'
 import { uniqueId } from 'utils'
 import React from 'react'
-import { pointInBounds } from 'utils/hitTests'
 
 function getDefaultShapeUtil<T extends Shape>(): ShapeUtility<T> {
   return {

state/state.ts

@@ -11,7 +11,6 @@ import commands from './commands'
 import {
   getChildren,
   getCommonBounds,
-  getCurrent,
   getCurrentCamera,
   getPage,
   getSelectedBounds,
@@ -27,8 +26,10 @@ import {
   setSelectedIds,
   getPageState,
   setToArray,
-  copyToClipboard,
+  deepClone,
+  pointInBounds,
 } from 'utils'
+
 import {
   Data,
   PointerInfo,
@@ -47,7 +48,6 @@ import {
   ColorStyle,
 } from 'types'
 import session from './session'
-import { pointInBounds } from 'utils/hitTests'
 
 const initialData: Data = {
   isReadOnly: false,
@@ -335,8 +335,6 @@ const state = createState({
         selecting: {
           onEnter: ['setActiveToolSelect', 'clearInputs'],
           on: {
-            UNDO: 'undo',
-            REDO: 'redo',
             SAVED: 'forceSave',
             DELETED: {
               unless: 'isReadOnly',
@@ -773,8 +771,6 @@ const state = createState({
                       do: 'createShape',
                       to: 'arrow.editing',
                     },
-                    UNDO: { do: 'undo' },
-                    REDO: { do: 'redo' },
                   },
                 },
                 editing: {
@@ -1144,7 +1140,7 @@ const state = createState({
       const shape = createShape(type, {
         parentId: data.currentPageId,
         point: vec.round(screenToWorld(payload.point, data)),
-        style: getCurrent(data.currentStyle),
+        style: deepClone(data.currentStyle),
       })
 
       const siblings = getChildren(data, shape.parentId)
@@ -1748,7 +1744,7 @@ const state = createState({
       data,
       payload: { shapes: Shape[]; controls: CodeControl[] }
     ) {
-      commands.generate(data, data.currentPageId, payload.shapes)
+      commands.generate(data, payload.shapes)
     },
     setCodeControls(data, payload: { controls: CodeControl[] }) {
       data.codeControls = Object.fromEntries(
@@ -1776,7 +1772,7 @@ const state = createState({
           data.document.code[data.currentCodeFileId].code
         )
 
-        commands.generate(data, data.currentPageId, shapes)
+        commands.generate(data, shapes)
       } catch (e) {
         console.error(e)
       }
@@ -1807,7 +1803,7 @@ const state = createState({
     },
 
     copyStateToClipboard(data) {
-      copyToClipboard(JSON.stringify(data))
+      clipboard.copyStringToClipboard(JSON.stringify(data))
     },
 
     pasteFromClipboard() {

utils/bounds.ts

@@ -1,94 +0,0 @@
-import { Bounds } from 'types'
-import { pointInBounds } from './hitTests'
-import { intersectPolygonBounds } from './intersections'
-
-/**
- * Get whether two bounds collide.
- * @param a Bounds
- * @param b Bounds
- * @returns
- */
-export function boundsCollide(a: Bounds, b: Bounds): boolean {
-  return !(
-    a.maxX < b.minX ||
-    a.minX > b.maxX ||
-    a.maxY < b.minY ||
-    a.minY > b.maxY
-  )
-}
-
-/**
- * Get whether the bounds of A contain the bounds of B. A perfect match will return true.
- * @param a Bounds
- * @param b Bounds
- * @returns
- */
-export function boundsContain(a: Bounds, b: Bounds): boolean {
-  return (
-    a.minX < b.minX && a.minY < b.minY && a.maxY > b.maxY && a.maxX > b.maxX
-  )
-}
-
-/**
- * Get whether the bounds of A are contained by the bounds of B.
- * @param a Bounds
- * @param b Bounds
- * @returns
- */
-export function boundsContained(a: Bounds, b: Bounds): boolean {
-  return boundsContain(b, a)
-}
-
-/**
- * Get whether a set of points are all contained by a bounding box.
- * @returns
- */
-export function boundsContainPolygon(a: Bounds, points: number[][]): boolean {
-  return points.every((point) => pointInBounds(point, a))
-}
-
-/**
- * Get whether a polygon collides a bounding box.
- * @param points
- * @param b
- */
-export function boundsCollidePolygon(a: Bounds, points: number[][]): boolean {
-  return intersectPolygonBounds(points, a).length > 0
-}
-
-/**
- * Get whether two bounds are identical.
- * @param a Bounds
- * @param b Bounds
- * @returns
- */
-export function boundsAreEqual(a: Bounds, b: Bounds): boolean {
-  return !(
-    b.maxX !== a.maxX ||
-    b.minX !== a.minX ||
-    b.maxY !== a.maxY ||
-    b.minY !== a.minY
-  )
-}
-
-export function getRotatedEllipseBounds(
-  x: number,
-  y: number,
-  rx: number,
-  ry: number,
-  rotation: number
-): Bounds {
-  const c = Math.cos(rotation)
-  const s = Math.sin(rotation)
-  const w = Math.hypot(rx * c, ry * s)
-  const h = Math.hypot(rx * s, ry * c)
-
-  return {
-    minX: x + rx - w,
-    minY: y + ry - h,
-    maxX: x + rx + w,
-    maxY: y + ry + h,
-    width: w * 2,
-    height: h * 2,
-  }
-}

utils/gtag.ts

@@ -8,15 +8,19 @@ type GTagEvent = {
 }
 
 export const pageview = (url: URL): void => {
-  ;(window as any).gtag('config', GA_TRACKING_ID, {
+  if ('gtag' in window) {
+    ;(window as any)?.gtag('config', GA_TRACKING_ID, {
       page_path: url,
     })
   }
+}
 
 export const event = ({ action, category, label, value }: GTagEvent): void => {
-  ;(window as any).gtag('event', action, {
+  if ('gtag' in window) {
+    ;(window as any)?.gtag('event', action, {
       event_category: category,
       event_label: label,
       value: value,
     })
   }
+}

utils/hitTests.ts

@@ -1,48 +0,0 @@
-import { Bounds } from 'types'
-import vec from './vec'
-
-/**
- * Get whether a point is inside of a bounds.
- * @param A
- * @param b
- * @returns
- */
-export function pointInBounds(A: number[], b: Bounds): boolean {
-  return !(A[0] < b.minX || A[0] > b.maxX || A[1] < b.minY || A[1] > b.maxY)
-}
-
-/**
- * Get whether a point is inside of a circle.
- * @param A
- * @param b
- * @returns
- */
-export function pointInCircle(A: number[], C: number[], r: number): boolean {
-  return vec.dist(A, C) <= r
-}
-
-/**
- * Get whether a point is inside of an ellipse.
- * @param point
- * @param center
- * @param rx
- * @param ry
- * @param rotation
- * @returns
- */
-export function pointInEllipse(
-  A: number[],
-  C: number[],
-  rx: number,
-  ry: number,
-  rotation = 0
-): boolean {
-  rotation = rotation || 0
-  const cos = Math.cos(rotation)
-  const sin = Math.sin(rotation)
-  const delta = vec.sub(A, C)
-  const tdx = cos * delta[0] + sin * delta[1]
-  const tdy = sin * delta[0] - cos * delta[1]
-
-  return (tdx * tdx) / (rx * rx) + (tdy * tdy) / (ry * ry) <= 1
-}

utils/intersections.ts

@@ -12,6 +12,31 @@ function getIntersection(message: string, ...points: number[][]) {
   return { didIntersect: points.length > 0, message, points }
 }
 
+export function intersectRays(
+  p0: number[],
+  n0: number[],
+  p1: number[],
+  n1: number[]
+): Intersection {
+  const dx = p1[0] - p0[0]
+  const dy = p1[1] - p0[1]
+  const det = n1[0] * n0[1] - n1[1] * n0[0]
+  const u = (dy * n1[0] - dx * n1[1]) / det
+  const v = (dy * n0[0] - dx * n0[1]) / det
+  if (u < 0 || v < 0) return getIntersection('miss')
+
+  const m0 = n0[1] / n0[0]
+  const m1 = n1[1] / n1[0]
+  const b0 = p0[1] - m0 * p0[0]
+  const b1 = p1[1] - m1 * p1[0]
+  const x = (b1 - b0) / (m0 - m1)
+  const y = m0 * x + b0
+
+  return Number.isFinite(x)
+    ? getIntersection('intersection', [x, y])
+    : getIntersection('parallel')
+}
+
 export function intersectLineSegments(
   a1: number[],
   a2: number[],
@@ -45,6 +70,27 @@ export function intersectLineSegments(
   return getIntersection('no intersection')
 }
 
+export function intersectCircleCircle(a: number[], b: number[]): Intersection {
+  const R = a[2],
+    r = b[2]
+
+  let dx = b[0] - a[0],
+    dy = b[1] - a[1]
+
+  const d = Math.sqrt(dx * dx + dy * dy),
+    x = (d * d - r * r + R * R) / (2 * d),
+    y = Math.sqrt(R * R - x * x)
+
+  dx /= d
+  dy /= d
+
+  return getIntersection(
+    'intersection',
+    [a[0] + dx * x - dy * y, a[1] + dy * x + dx * y],
+    [a[0] + dx * x + dy * y, a[1] + dy * x - dx * y]
+  )
+}
+
 export function intersectCircleLineSegment(
   c: number[],
   r: number,

utils/vec.ts

@@ -472,7 +472,7 @@ export default class Vec {
   }
 
   /**
-   * Get a vector d distance from A towards B.
+   * Push a point A towards point B by a given distance.
    * @param A
    * @param B
    * @param d
@@ -482,6 +482,16 @@ export default class Vec {
     return Vec.add(A, Vec.mul(Vec.uni(Vec.vec(A, B)), d))
   }
 
+  /**
+   * Push a point in a given angle by a given distance.
+   * @param A
+   * @param B
+   * @param d
+   */
+  static nudgeAtAngle = (A: number[], a: number, d: number): number[] => {
+    return [Math.cos(a) * d + A[0], Math.sin(a) * d + A[1]]
+  }
+
   /**
    * Round a vector to a precision length.
    * @param a
@@ -490,4 +500,19 @@ export default class Vec {
   static toPrecision = (a: number[], n = 4): number[] => {
     return [+a[0].toPrecision(n), +a[1].toPrecision(n)]
   }
+
+  /**
+   * Get a number of points between two points.
+   * @param a
+   * @param b
+   * @param steps
+   */
+  static pointsBetween = (a: number[], b: number[], steps = 6): number[][] => {
+    return Array.from(Array(steps))
+      .map((_, i) => {
+        const t = i / steps
+        return t * t * t
+      })
+      .map((t) => [...Vec.lrp(a, b, t), (1 - t) / 2])
+  }
 }