Undo and redo cycling through map edit history

src/components/gameMaster/mapEditor/Map.vue

@@ -10,7 +10,7 @@ import MapTiles from '@/components/gameMaster/mapEditor/mapPartials/MapTiles.vue
 import PlacedMapObjects from '@/components/gameMaster/mapEditor/mapPartials/PlacedMapObjects.vue'
 import { useMapEditorComposable } from '@/composables/useMapEditorComposable'
 import { useScene } from 'phavuer'
-import { onMounted, onUnmounted, shallowRef, useTemplateRef } from 'vue'
+import { onBeforeUnmount, onMounted, onUnmounted, shallowRef, useTemplateRef } from 'vue'
 
 const tileMap = shallowRef<Phaser.Tilemaps.Tilemap>()
 const mapEditor = useMapEditorComposable()
@@ -41,8 +41,20 @@ function handlePointerDown(pointer: Phaser.Input.Pointer) {
   }
 }
 
+function handleKeyDown(event: KeyboardEvent) {
+  //CTRL+Y
+  if (event.key === 'y' && event.ctrlKey ) {
+    mapTiles.value!.redo()
+  }
+
+  //CTRL+Z
+  if (event.key === 'z' && event.ctrlKey) {
+    mapTiles.value!.undo()
+  }
+}
+
 function handlePointerMove(pointer: Phaser.Input.Pointer) {
-  if (mapEditor.inputMode.value === 'hold') {
+  if (mapEditor.inputMode.value === 'hold' && pointer.isDown) {
     handlePointerDown(pointer)
   }
 }
@@ -54,6 +66,7 @@ function handlePointerUp(pointer: Phaser.Input.Pointer) {
 }
 
 onMounted(() => {
+  addEventListener('keydown', handleKeyDown)
   scene.input.on(Phaser.Input.Events.POINTER_DOWN, handlePointerDown)
   scene.input.on(Phaser.Input.Events.POINTER_MOVE, handlePointerMove)
   scene.input.on(Phaser.Input.Events.POINTER_UP, handlePointerUp)
@@ -65,4 +78,8 @@ onUnmounted(() => {
   scene.input.off(Phaser.Input.Events.POINTER_UP, handlePointerUp)
   mapEditor.reset()
 })
+
+onBeforeUnmount(() => {
+  removeEventListener('keydown', handleKeyDown)
+})
 </script>

src/components/gameMaster/mapEditor/mapPartials/MapTiles.vue

@@ -9,7 +9,7 @@ import { createTileArray, getTile, placeTile, setLayerTiles } from '@/composable
 import { useMapEditorComposable } from '@/composables/useMapEditorComposable'
 import { TileStorage } from '@/storage/storages'
 import { useScene } from 'phavuer'
-import { onMounted, onUnmounted, shallowRef, watch } from 'vue'
+import { onMounted, onUnmounted, ref, shallowRef, watch } from 'vue'
 
 import Tileset = Phaser.Tilemaps.Tileset
 
@@ -22,27 +22,25 @@ const tileStorage = new TileStorage()
 const tileMap = shallowRef<Phaser.Tilemaps.Tilemap>()
 const tileLayer = shallowRef<Phaser.Tilemaps.TilemapLayer>()
 
-defineExpose({ handlePointer, finalizeCommand })
+defineExpose({ handlePointer, finalizeCommand, undo, redo })
+
+class EditorCommand {
+  public operation: 'draw' | 'erase' = 'draw'
+  public tileName: string = "blank_tile"
+  public affectedTiles: number[][]
+
+  constructor(operation: 'draw' | 'erase', tileName: string) {
+    this.operation = operation
+    this.tileName = tileName
+    this.affectedTiles = []
+  }
+}
 
 //Record of commands
 let commandStack: EditorCommand[] = []
 let currentCommand: EditorCommand | null = null
-
+let commandIndex = ref(0)
-type EditorCommand = {
+let originTiles: string[][] = []
-  operation: 'draw' | 'erase'
-  tileName?: string,
-  affectedTiles: TileChangeSet
-}
-
-//It must check if the position is in the set already. Otherwise it will duplicate positions
-class TileChangeSet extends Set<{ x: number; y: number }> {
-  has(value: { x: number; y: number }): boolean {
-    for (const pos of this) {
-      if (pos.x === value.x && pos.y === value.y) return true
-    }
-    return false
-  }
-}
 
 function createTileMap() {
   const mapData = new Phaser.Tilemaps.MapData({
@@ -93,17 +91,7 @@ function pencil(pointer: Phaser.Input.Pointer) {
   // Place tile
   placeTile(tileMap.value, tileLayer.value, tile.x, tile.y, mapEditor.selectedTile.value)
 
-  if (!currentCommand) {
+  createCommandUpdate(tile.x, tile.y, mapEditor.selectedTile.value, 'draw')
-    currentCommand = {
-      operation: 'draw',
-      tileName: mapEditor.selectedTile.value,
-      affectedTiles: new TileChangeSet()
-    }
-  }
-
-  if (!currentCommand.affectedTiles.has({ x: tile.x, y: tile.y })) {
-    currentCommand.affectedTiles.add({ x: tile.x, y: tile.y })
-  }
 
   // Adjust mapEditorStore.map.tiles
   map.tiles[tile.y][tile.x] = mapEditor.selectedTile.value
@@ -122,17 +110,7 @@ function eraser(pointer: Phaser.Input.Pointer) {
   // Place tile
   placeTile(tileMap.value, tileLayer.value, tile.x, tile.y, 'blank_tile')
 
-  if (!currentCommand) {
+  createCommandUpdate(tile.x, tile.y, 'blank_tile', 'erase')
-    currentCommand = {
-      operation: 'erase',
-      tileName: 'blank_tile',
-      affectedTiles: new TileChangeSet()
-    }
-  }
-
-  if (!currentCommand.affectedTiles.has({ x: tile.x, y: tile.y })) {
-    currentCommand.affectedTiles.add({ x: tile.x, y: tile.y })
-  }
 
   // Adjust mapEditorStore.map.tiles
   map.tiles[tile.y][tile.x] = 'blank_tile'
@@ -165,28 +143,11 @@ function tilePicker(pointer: Phaser.Input.Pointer) {
   mapEditor.setSelectedTile(map.tiles[tile.y][tile.x])
 }
 
-function finalizeCommand() {
-  commandStack.push(currentCommand!)
-  currentCommand = null
-}
-
-watch(
-  () => mapEditor.shouldClearTiles,
-  (shouldClear) => {
-    if (shouldClear && mapEditor.currentMap.value && tileMap.value && tileLayer.value) {
-      const blankTiles = createTileArray(tileLayer.value.width, tileLayer.value.height, 'blank_tile')
-      setLayerTiles(tileMap.value, tileLayer.value, blankTiles)
-      mapEditor.currentMap.value.tiles = blankTiles
-      mapEditor.resetClearTilesFlag()
-    }
-  }
-)
-
 function handlePointer(pointer: Phaser.Input.Pointer) {
   if (!tileMap.value || !tileLayer.value) return
 
   // Check if left mouse button is pressed
-  if (!pointer.isDown) return
+  if (!pointer.isDown && pointer.button === 0) return
 
   // Check if shift is not pressed, this means we are moving the camera
   if (pointer.event.shiftKey) return
@@ -211,26 +172,106 @@ function handlePointer(pointer: Phaser.Input.Pointer) {
   }
 }
 
+function createCommandUpdate(x: number, y: number, tileName: string, operation: 'draw' | 'erase') {
+  if (!currentCommand) {
+    currentCommand = new EditorCommand(operation, tileName)
+  }
+
+  //If position is already in, do not proceed
+  for (const vec of currentCommand.affectedTiles) {
+    if (vec[0] === x && vec[1] === y) return
+  }
+
+  currentCommand.affectedTiles.push([x,y])
+}
+
+function finalizeCommand() {
+  if (!currentCommand) return
+  //Cut the stack so the current edit is the last
+  commandStack = commandStack.slice(0, commandIndex.value)
+  commandStack.push(currentCommand)
+  if (commandStack.length >= 9) {
+    originTiles = applyCommands(originTiles, commandStack.shift())
+  }
+
+  commandIndex.value = commandStack.length
+  currentCommand = null
+}
+
+function undo() {
+  if (commandIndex.value > 0) {
+    commandIndex.value--
+    updateMapTiles()
+  }
+}
+
+function redo() {
+  if (commandIndex.value <= 9 && commandIndex.value <= commandStack.length) {
+    commandIndex.value++
+    updateMapTiles()
+  }
+}
+
+function applyCommands(tiles: string[][], ...commands: EditorCommand[]): string[][] {
+  let tileVersion = cloneArray(tiles)
+  for (let command of commands) {
+    for (const position of command.affectedTiles) {
+      tileVersion[position[1]][position[0]] = command.tileName
+    }
+  }
+  return tileVersion
+}
+
+function updateMapTiles() {
+  if (!tileMap.value || !tileLayer.value || !mapEditor.currentMap.value) return
+
+  let indexedCommands = commandStack.slice(0, commandIndex.value)
+  let modifiedTiles = applyCommands(originTiles, ...indexedCommands)
+
+  //replaceTiles(mapEditor.currentMap.value.tiles, layer, tileMap.value.width, tileMap.value.height)
+  setLayerTiles(tileMap.value, tileLayer.value, modifiedTiles)
+  mapEditor.currentMap.value.tiles = modifiedTiles
+}
+
+//Recursive Array Clone
+function cloneArray(arr: any[]) : any[] {
+  return arr.map((item) => item instanceof Array ? cloneArray(item) : item)
+}
+
+watch(
+  () => mapEditor.shouldClearTiles,
+  (shouldClear) => {
+    if (shouldClear && mapEditor.currentMap.value && tileMap.value && tileLayer.value) {
+      const blankTiles = createTileArray(tileLayer.value.width, tileLayer.value.height, 'blank_tile')
+      setLayerTiles(tileMap.value, tileLayer.value, blankTiles)
+      replaceTiles(mapEditor.currentMap.value.tiles, blankTiles, tileLayer.value.width, tileLayer.value.height)
+      mapEditor.resetClearTilesFlag()
+    }
+  }
+)
+
+// Then overlay the map tiles, but only within the current map dimensions
+function replaceTiles(originalTiles: string[][], mapTiles: string[][], width: number, height: number) {
+  for (let y = 0; y < height; y++) {
+    for (let x = 0; x < width; x++) {
+      if (mapTiles[y] && mapTiles[y][x] !== undefined) {
+        originalTiles[y][x] = mapTiles[y][x]
+      }
+    }
+  }
+}
+
 onMounted(async () => {
   if (!mapEditor.currentMap.value) return
+  const mapState = mapEditor.currentMap.value
+
+  //Clone
+  originTiles = cloneArray(mapEditor.currentMap.value.tiles)
 
   tileMap.value = createTileMap()
   tileLayer.value = await createTileLayer(tileMap.value)
 
-  // First fill the entire map with blank tiles using current map dimensions
+  setLayerTiles(tileMap.value, tileLayer.value, mapState.tiles)
-  const blankTiles = createTileArray(mapEditor.currentMap.value.width, mapEditor.currentMap.value.height, 'blank_tile')
-
-  // Then overlay the map tiles, but only within the current map dimensions
-  const mapTiles = mapEditor.currentMap.value.tiles
-  for (let y = 0; y < mapEditor.currentMap.value.height; y++) {
-    for (let x = 0; x < mapEditor.currentMap.value.width; x++) {
-      if (mapTiles[y] && mapTiles[y][x] !== undefined) {
-        blankTiles[y][x] = mapTiles[y][x]
-      }
-    }
-  }
-
-  setLayerTiles(tileMap.value, tileLayer.value, blankTiles)
 })
 
 onUnmounted(() => {

src/components/gameMaster/mapEditor/partials/Toolbar.vue

@@ -169,6 +169,8 @@ function initKeyShortcuts(event: KeyboardEvent) {
   // prevent if focused on composables
   if (document.activeElement?.tagName === 'INPUT') return
 
+  if (event.ctrlKey) return
+
   const keyActions: { [key: string]: string } = {
     m: 'move',
     p: 'pencil',