When selecting multiple instances, dynamically show instances that will be (un)selected

newIDE/app/src/InstancesEditor/InstancesAdder.js

@@ -1,5 +1,6 @@
 // @flow
 import { roundPosition } from '../Utils/GridHelpers';
+import { unserializeFromJSObject } from '../Utils/Serializer';
 import { type InstancesEditorSettings } from './InstancesEditorSettings';
 const gd: libGDevelop = global.gd;
 
@@ -51,6 +52,67 @@ export default class InstancesAdder {
     this._instancesEditorSettings = instancesEditorSettings;
   }
 
+  addSerializedInstances = ({
+    position,
+    copyReferential,
+    serializedInstances,
+    preventSnapToGrid = false,
+    addInstancesInTheForeground = false,
+  }: {|
+    position: [number, number],
+    copyReferential: [number, number],
+    serializedInstances: Array<Object>,
+    preventSnapToGrid?: boolean,
+    addInstancesInTheForeground?: boolean,
+  |}): Array<gdInitialInstance> => {
+    this._zOrderFinder.reset();
+    this._instances.iterateOverInstances(this._zOrderFinder);
+    const sceneForegroundZOrder = this._zOrderFinder.getHighestZOrder() + 1;
+
+    let addedInstancesLowestZOrder = null;
+
+    const newInstances = serializedInstances.map(serializedInstance => {
+      const instance = new gd.InitialInstance();
+      unserializeFromJSObject(instance, serializedInstance);
+      const desiredPosition = [
+        instance.getX() - copyReferential[0] + position[0],
+        instance.getY() - copyReferential[1] + position[1],
+      ];
+      const newPos = preventSnapToGrid
+        ? desiredPosition
+        : roundPositionsToGrid(desiredPosition, this._instancesEditorSettings);
+      instance.setX(newPos[0]);
+      instance.setY(newPos[1]);
+      if (addInstancesInTheForeground) {
+        if (
+          addedInstancesLowestZOrder === null ||
+          addedInstancesLowestZOrder > instance.getZOrder()
+        ) {
+          addedInstancesLowestZOrder = instance.getZOrder();
+        }
+      }
+      const newInstance = this._instances
+        .insertInitialInstance(instance)
+        .resetPersistentUuid();
+      instance.delete();
+      return newInstance;
+    });
+
+    if (addInstancesInTheForeground && addedInstancesLowestZOrder !== null) {
+      newInstances.forEach(instance => {
+        instance.setZOrder(
+          instance.getZOrder() -
+            // Flow is not happy with addedInstancesLowestZOrder possible null value
+            // so 0 is used as a fallback.
+            (addedInstancesLowestZOrder || 0) +
+            sceneForegroundZOrder
+        );
+      });
+    }
+
+    return newInstances;
+  };
+
   /**
    * Immediately create new instance at the specified position
    * (specified in scene coordinates).

newIDE/app/src/InstancesEditor/SelectedInstances.js

@@ -27,6 +27,7 @@ type Props = {|
   onRotateEnd: () => void,
   toCanvasCoordinates: (x: number, y: number) => [number, number],
   screenType: ScreenType,
+  showHandles: boolean,
 |};
 
 const getButtonSizes = (screenType: ScreenType) => {
@@ -77,6 +78,7 @@ export default class SelectedInstances {
   onRotateEnd: () => void;
   toCanvasCoordinates: (x: number, y: number) => [number, number];
   _screenType: ScreenType;
+  showHandles: boolean;
 
   pixiContainer = new PIXI.Container();
   rectanglesContainer = new PIXI.Container();
@@ -93,6 +95,7 @@ export default class SelectedInstances {
     onRotateEnd,
     toCanvasCoordinates,
     screenType,
+    showHandles,
   }: Props) {
     this.instanceMeasurer = instanceMeasurer;
     this.onResize = onResize;
@@ -102,33 +105,36 @@ export default class SelectedInstances {
     this.toCanvasCoordinates = toCanvasCoordinates;
     this.instancesSelection = instancesSelection;
     this._screenType = screenType;
+    this.showHandles = showHandles;
 
     this.pixiContainer.addChild(this.rectanglesContainer);
 
-    for (const resizeGrabbingLocation of resizeGrabbingLocationValues) {
-      const resizeButton = new PIXI.Graphics();
-      this.resizeButtons[resizeGrabbingLocation] = resizeButton;
+    if (showHandles) {
+      for (const resizeGrabbingLocation of resizeGrabbingLocationValues) {
+        const resizeButton = new PIXI.Graphics();
+        this.resizeButtons[resizeGrabbingLocation] = resizeButton;
+        this._makeButton(
+          resizeButton,
+          event => {
+            this.onResize(event.deltaX, event.deltaY, resizeGrabbingLocation);
+          },
+          () => {
+            this.onResizeEnd();
+          },
+          resizeGrabbingIconNames[resizeGrabbingLocation]
+        );
+      }
       this._makeButton(
-        resizeButton,
+        this.rotateButton,
         event => {
-          this.onResize(event.deltaX, event.deltaY, resizeGrabbingLocation);
+          this.onRotate(event.deltaX, event.deltaY);
         },
         () => {
-          this.onResizeEnd();
+          this.onRotateEnd();
         },
-        resizeGrabbingIconNames[resizeGrabbingLocation]
+        'url("res/actions/rotate24_black.png"),auto'
       );
     }
-    this._makeButton(
-      this.rotateButton,
-      event => {
-        this.onRotate(event.deltaX, event.deltaY);
-      },
-      () => {
-        this.onRotateEnd();
-      },
-      'url("res/actions/rotate24_black.png"),auto'
-    );
   }
 
   setScreenType(screenType: ScreenType) {
@@ -260,9 +266,10 @@ export default class SelectedInstances {
       this.rectanglesContainer.removeChild(this.selectedRectangles.pop());
     }
 
-    // If there are no unlocked instances, hide the resize buttons.
-    const show =
-      selection.filter(instance => !instance.isLocked()).length !== 0;
+    if (!this.showHandles) return;
+
+    // If there is any unlocked instances, show the resize buttons.
+    const show = selection.some(instance => !instance.isLocked());
 
     // Position the resize buttons.
     for (const grabbingLocation of resizeGrabbingLocationValues) {

newIDE/app/src/InstancesEditor/SelectionRectangle.js

@@ -4,6 +4,39 @@ import Rectangle from '../Utils/Rectangle';
 import { type InstanceMeasurer } from './InstancesRenderer';
 const gd: libGDevelop = global.gd;
 
+const getRectangleNormalizedBoundaries = ({
+  startX,
+  startY,
+  endX,
+  endY,
+}: {
+  startX: number,
+  startY: number,
+  endX: number,
+  endY: number,
+}) => {
+  let normalizedStartX = startX;
+  let normalizedStartY = startY;
+  let normalizedEndX = endX;
+  let normalizedEndY = endY;
+  if (normalizedStartX > normalizedEndX) {
+    const tmp = normalizedStartX;
+    normalizedStartX = normalizedEndX;
+    normalizedEndX = tmp;
+  }
+  if (normalizedStartY > normalizedEndY) {
+    const tmp = normalizedStartY;
+    normalizedStartY = normalizedEndY;
+    normalizedEndY = tmp;
+  }
+  return {
+    startX: normalizedStartX,
+    startY: normalizedStartY,
+    endX: normalizedEndX,
+    endY: normalizedEndY,
+  };
+};
+
 export default class SelectionRectangle {
   instances: gdInitialInstancesContainer;
   instanceMeasurer: InstanceMeasurer;
@@ -12,9 +45,13 @@ export default class SelectionRectangle {
   pixiRectangle: PIXI.Graphics;
   selectionRectangleStart: { x: number, y: number } | null;
   selectionRectangleEnd: { x: number, y: number } | null;
+  temporarySelectionRectangleStart: { x: number, y: number } | null;
+  temporarySelectionRectangleEnd: { x: number, y: number } | null;
   _instancesInSelectionRectangle: gdInitialInstance[];
+  _temporaryInstancesInSelectionRectangle: gdInitialInstance[];
 
   selector: gdInitialInstanceJSFunctor;
+  temporarySelector: gdInitialInstanceJSFunctor;
   /**
    * Used to check if an instance is in the selection rectangle
    */
@@ -38,6 +75,7 @@ export default class SelectionRectangle {
     this.selectionRectangleStart = null;
     this.selectionRectangleEnd = null;
     this._instancesInSelectionRectangle = [];
+    this._temporaryInstancesInSelectionRectangle = [];
 
     this._temporaryAABB = new Rectangle();
     this.selector = new gd.InitialInstanceJSFunctor();
@@ -71,6 +109,41 @@ export default class SelectionRectangle {
         this._instancesInSelectionRectangle.push(instance);
       }
     };
+    this.temporarySelector = new gd.InitialInstanceJSFunctor();
+    // $FlowFixMe - invoke is not writable
+    this.temporarySelector.invoke = instancePtr => {
+      // $FlowFixMe - wrapPointer is not exposed
+      const instance = gd.wrapPointer(instancePtr, gd.InitialInstance);
+      const instanceAABB = this.instanceMeasurer.getInstanceAABB(
+        instance,
+        this._temporaryAABB
+      );
+
+      const {
+        temporarySelectionRectangleEnd,
+        temporarySelectionRectangleStart,
+      } = this;
+      if (!temporarySelectionRectangleStart || !temporarySelectionRectangleEnd)
+        return;
+
+      const selectionSceneStart = toSceneCoordinates(
+        temporarySelectionRectangleStart.x,
+        temporarySelectionRectangleStart.y
+      );
+      const selectionSceneEnd = toSceneCoordinates(
+        temporarySelectionRectangleEnd.x,
+        temporarySelectionRectangleEnd.y
+      );
+
+      if (
+        selectionSceneStart[0] <= instanceAABB.left &&
+        instanceAABB.right <= selectionSceneEnd[0] &&
+        selectionSceneStart[1] <= instanceAABB.top &&
+        instanceAABB.bottom <= selectionSceneEnd[1]
+      ) {
+        this._temporaryInstancesInSelectionRectangle.push(instance);
+      }
+    };
   }
 
   hasStartedSelectionRectangle() {
@@ -82,28 +155,55 @@ export default class SelectionRectangle {
     this.selectionRectangleEnd = { x, y };
   };
 
-  updateSelectionRectangle = (lastX: number, lastY: number) => {
+  updateSelectionRectangle = (
+    lastX: number,
+    lastY: number
+  ): Array<gdInitialInstance> => {
     if (!this.selectionRectangleStart)
       this.selectionRectangleStart = { x: lastX, y: lastY };
 
     this.selectionRectangleEnd = { x: lastX, y: lastY };
+    this._temporaryInstancesInSelectionRectangle.length = 0;
+    const normalizedSelectionRectangle = getRectangleNormalizedBoundaries({
+      startX: this.selectionRectangleStart.x,
+      startY: this.selectionRectangleStart.y,
+      endX: this.selectionRectangleEnd.x,
+      endY: this.selectionRectangleEnd.y,
+    });
+    this.temporarySelectionRectangleStart = {
+      x: normalizedSelectionRectangle.startX,
+      y: normalizedSelectionRectangle.startY,
+    };
+    this.temporarySelectionRectangleEnd = {
+      x: normalizedSelectionRectangle.endX,
+      y: normalizedSelectionRectangle.endY,
+    };
+
+    this.instances.iterateOverInstances(
+      // $FlowFixMe - gd.castObject is not supporting typings.
+      this.temporarySelector
+    );
+    return this._temporaryInstancesInSelectionRectangle;
   };
 
-  endSelectionRectangle = () => {
+  endSelectionRectangle = (): Array<gdInitialInstance> => {
     if (!this.selectionRectangleStart || !this.selectionRectangleEnd) return [];
 
     this._instancesInSelectionRectangle.length = 0;
-    if (this.selectionRectangleStart.x > this.selectionRectangleEnd.x) {
-      const tmp = this.selectionRectangleStart.x;
-      this.selectionRectangleStart.x = this.selectionRectangleEnd.x;
-      this.selectionRectangleEnd.x = tmp;
-    }
-    if (this.selectionRectangleStart.y > this.selectionRectangleEnd.y) {
-      const tmp = this.selectionRectangleStart.y;
-      this.selectionRectangleStart.y = this.selectionRectangleEnd.y;
-      this.selectionRectangleEnd.y = tmp;
-    }
-
+    const normalizedSelectionRectangle = getRectangleNormalizedBoundaries({
+      startX: this.selectionRectangleStart.x,
+      startY: this.selectionRectangleStart.y,
+      endX: this.selectionRectangleEnd.x,
+      endY: this.selectionRectangleEnd.y,
+    });
+    this.selectionRectangleStart = {
+      x: normalizedSelectionRectangle.startX,
+      y: normalizedSelectionRectangle.startY,
+    };
+    this.selectionRectangleEnd = {
+      x: normalizedSelectionRectangle.endX,
+      y: normalizedSelectionRectangle.endY,
+    };
     this.instances.iterateOverInstances(
       // $FlowFixMe - gd.castObject is not supporting typings.
       this.selector

newIDE/app/src/InstancesEditor/index.js

@@ -103,6 +103,7 @@ export default class InstancesEditor extends Component<Props> {
   lastContextMenuY = 0;
   lastCursorX = 0;
   lastCursorY = 0;
+  instancesTemporarySelection = new InstancesSelection();
   fpsLimiter = new FpsLimiter(28);
   canvasArea: ?HTMLDivElement;
   pixiRenderer: PIXI.Renderer;
@@ -112,6 +113,7 @@ export default class InstancesEditor extends Component<Props> {
   _instancesAdder: InstancesAdder;
   selectionRectangle: SelectionRectangle;
   selectedInstances: SelectedInstances;
+  temporarySelectedInstances: SelectedInstances;
   highlightedInstance: HighlightedInstance;
   instancesResizer: InstancesResizer;
   instancesRotator: InstancesRotator;
@@ -383,6 +385,18 @@ export default class InstancesEditor extends Component<Props> {
       onResizeEnd: this._onResizeEnd,
       onRotate: this._onRotate,
       onRotateEnd: this._onRotateEnd,
+      showHandles: true,
+      instanceMeasurer: this.instancesRenderer.getInstanceMeasurer(),
+      toCanvasCoordinates: this.viewPosition.toCanvasCoordinates,
+      screenType: this.props.screenType,
+    });
+    this.temporarySelectedInstances = new SelectedInstances({
+      instancesSelection: this.instancesTemporarySelection,
+      onResize: () => {},
+      onResizeEnd: () => {},
+      onRotate: () => {},
+      onRotateEnd: () => {},
+      showHandles: false,
       instanceMeasurer: this.instancesRenderer.getInstanceMeasurer(),
       toCanvasCoordinates: this.viewPosition.toCanvasCoordinates,
       screenType: this.props.screenType,
@@ -425,6 +439,9 @@ export default class InstancesEditor extends Component<Props> {
     this.pixiContainer.addChild(this.windowBorder.getPixiObject());
     this.pixiContainer.addChild(this.windowMask.getPixiObject());
     this.pixiContainer.addChild(this.selectedInstances.getPixiContainer());
+    this.pixiContainer.addChild(
+      this.temporarySelectedInstances.getPixiContainer()
+    );
     this.pixiContainer.addChild(this.highlightedInstance.getPixiObject());
     this.pixiContainer.addChild(this.statusBar.getPixiObject());
   }
@@ -488,6 +505,7 @@ export default class InstancesEditor extends Component<Props> {
 
     if (nextProps.screenType !== this.props.screenType) {
       this.selectedInstances.setScreenType(this.props.screenType);
+      this.temporarySelectedInstances.setScreenType(this.props.screenType);
     }
 
     if (
@@ -549,12 +567,26 @@ export default class InstancesEditor extends Component<Props> {
   };
 
   /**
-   * Immediately add instances for the specified objects at the given
+   * Immediately add serialized instances at the given
    * position (in scene coordinates).
    */
+  addSerializedInstances = (options: {|
+    position: [number, number],
+    copyReferential: [number, number],
+    serializedInstances: Array<Object>,
+    preventSnapToGrid?: boolean,
+    addInstancesInTheForeground?: boolean,
+  |}): Array<gdInitialInstance> => {
+    return this._instancesAdder.addSerializedInstances(options);
+  };
+
+  /**
+   * Immediately add instances for the specified objects at the given
+   * position (in scene coordinates) given their names.
+   */
   addInstances = (
-    pos /*: [number, number] */,
-    objectNames /*: Array<string> */
+    pos: [number, number],
+    objectNames: Array<string>
   ): Array<gdInitialInstance> => {
     return this._instancesAdder.addInstances(pos, objectNames);
   };
@@ -594,7 +626,15 @@ export default class InstancesEditor extends Component<Props> {
 
       this.scrollBy(-sceneDeltaX, -sceneDeltaY);
     } else {
-      this.selectionRectangle.updateSelectionRectangle(x, y);
+      const temporarySelectedInstances = this.selectionRectangle.updateSelectionRectangle(
+        x,
+        y
+      );
+      this.instancesTemporarySelection.selectInstances({
+        instances: temporarySelectedInstances,
+        multiSelect: false,
+        layersVisibility: this._getLayersVisibility(),
+      });
     }
   };
 
@@ -622,6 +662,7 @@ export default class InstancesEditor extends Component<Props> {
       });
       instancesSelected = this.props.instancesSelection.getSelectedInstances();
       this.props.onInstancesSelected(instancesSelected);
+      this.instancesTemporarySelection.clearSelection();
     }
   };
 
@@ -946,6 +987,7 @@ export default class InstancesEditor extends Component<Props> {
       this.instancesRenderer.render();
       this.highlightedInstance.render();
       this.selectedInstances.render();
+      this.temporarySelectedInstances.render();
       this.selectionRectangle.render();
       this.windowBorder.render();
       this.windowMask.render();

newIDE/app/src/ObjectsList/index.js

@@ -316,6 +316,55 @@ const ObjectsList = React.forwardRef<Props, ObjectsListInterface>(
       [copyObject, deleteObject]
     );
 
+    const addSerializedObjectToObjectsContainer = React.useCallback(
+      ({
+        objectName,
+        positionObjectName,
+        objectType,
+        global,
+        serializedObject,
+      }: {|
+        objectName: string,
+        positionObjectName: string,
+        objectType: string,
+        global: boolean,
+        serializedObject: Object,
+      |}): ObjectWithContext => {
+        const newName = newNameGenerator(
+          objectName,
+          name =>
+            objectsContainer.hasObjectNamed(name) ||
+            project.hasObjectNamed(name),
+          ''
+        );
+
+        const newObject = global
+          ? project.insertNewObject(
+              project,
+              objectType,
+              newName,
+              project.getObjectPosition(positionObjectName) + 1
+            )
+          : objectsContainer.insertNewObject(
+              project,
+              objectType,
+              newName,
+              objectsContainer.getObjectPosition(positionObjectName) + 1
+            );
+
+        unserializeFromJSObject(
+          newObject,
+          serializedObject,
+          'unserializeFrom',
+          project
+        );
+        newObject.setName(newName); // Unserialization has overwritten the name.
+
+        return { object: newObject, global };
+      },
+      [objectsContainer, project]
+    );
+
     const paste = React.useCallback(
       (objectWithContext: ObjectWithContext): ?ObjectWithContext => {
         if (!Clipboard.has(CLIPBOARD_KIND)) return null;
@@ -336,42 +385,20 @@ const ObjectsList = React.forwardRef<Props, ObjectsListInterface>(
         );
         if (!name || !type || !copiedObject) return;
 
-        const newName = newNameGenerator(
-          name,
-          name =>
-            objectsContainer.hasObjectNamed(name) ||
-            project.hasObjectNamed(name),
-          ''
-        );
-
-        const newObject = global
-          ? project.insertNewObject(
-              project,
-              type,
-              newName,
-              project.getObjectPosition(pasteObject.getName()) + 1
-            )
-          : objectsContainer.insertNewObject(
-              project,
-              type,
-              newName,
-              objectsContainer.getObjectPosition(pasteObject.getName()) + 1
-            );
-
-        unserializeFromJSObject(
-          newObject,
-          copiedObject,
-          'unserializeFrom',
-          project
-        );
-        newObject.setName(newName); // Unserialization has overwritten the name.
+        const newObjectWithContext = addSerializedObjectToObjectsContainer({
+          objectName: name,
+          positionObjectName: pasteObject.getName(),
+          objectType: type,
+          serializedObject: copiedObject,
+          global,
+        });
 
         onObjectModified(false);
-        if (onObjectPasted) onObjectPasted(newObject);
+        if (onObjectPasted) onObjectPasted(newObjectWithContext.object);
 
-        return { object: newObject, global };
+        return newObjectWithContext;
       },
-      [objectsContainer, onObjectModified, onObjectPasted, project]
+      [addSerializedObjectToObjectsContainer, onObjectModified, onObjectPasted]
     );
 
     const editName = React.useCallback(
@@ -383,19 +410,25 @@ const ObjectsList = React.forwardRef<Props, ObjectsListInterface>(
       []
     );
 
-    const pasteAndRename = React.useCallback(
-      (objectWithContext: ObjectWithContext) => {
-        editName(paste(objectWithContext));
-      },
-      [editName, paste]
-    );
-
     const duplicateObject = React.useCallback(
       (objectWithContext: ObjectWithContext) => {
-        copyObject(objectWithContext);
-        pasteAndRename(objectWithContext);
+        const { object, global } = objectWithContext;
+
+        const type = object.getType();
+        const name = object.getName();
+        const serializedObject = serializeToJSObject(object);
+
+        const newObjectWithContext = addSerializedObjectToObjectsContainer({
+          objectName: name,
+          positionObjectName: name,
+          objectType: type,
+          serializedObject,
+          global,
+        });
+
+        editName(newObjectWithContext);
       },
-      [copyObject, pasteAndRename]
+      [addSerializedObjectToObjectsContainer, editName]
     );
 
     const rename = React.useCallback(

newIDE/app/src/SceneEditor/index.js

@@ -24,10 +24,7 @@ import SetupGridDialog from './SetupGridDialog';
 import ScenePropertiesDialog from './ScenePropertiesDialog';
 import { type ObjectEditorTab } from '../ObjectEditor/ObjectEditorDialog';
 import Toolbar from './Toolbar';
-import {
-  serializeToJSObject,
-  unserializeFromJSObject,
-} from '../Utils/Serializer';
+import { serializeToJSObject } from '../Utils/Serializer';
 import Clipboard, { SafeExtractor } from '../Utils/Clipboard';
 import Window from '../Utils/Window';
 import FullSizeInstancesEditorWithScrollbars from '../InstancesEditor/FullSizeInstancesEditorWithScrollbars';
@@ -157,7 +154,10 @@ type State = {|
   selectedObjectTags: SelectedTags,
 |};
 
-type CopyCutPasteOptions = { useLastCursorPosition?: boolean };
+type CopyCutPasteOptions = {|
+  useLastCursorPosition?: boolean,
+  pasteInTheForeground?: boolean,
+|};
 
 export default class SceneEditor extends React.Component<Props, State> {
   static defaultProps = {
@@ -1126,7 +1126,10 @@ export default class SceneEditor extends React.Component<Props, State> {
     return contextMenuItems;
   };
 
-  copySelection = ({ useLastCursorPosition }: CopyCutPasteOptions = {}) => {
+  copySelection = ({
+    useLastCursorPosition,
+    pasteInTheForeground,
+  }: CopyCutPasteOptions = {}) => {
     const serializedSelection = this.instancesSelection
       .getSelectedInstances()
       .map(instance => serializeToJSObject(instance));
@@ -1138,33 +1141,29 @@ export default class SceneEditor extends React.Component<Props, State> {
       Clipboard.set(INSTANCES_CLIPBOARD_KIND, {
         x: position[0],
         y: position[1],
+        pasteInTheForeground: !!pasteInTheForeground,
         instances: serializedSelection,
       });
     }
   };
 
-  cutSelection = (options: CopyCutPasteOptions = {}) => {
-    this.copySelection(options);
+  cutSelection = ({ useLastCursorPosition }: CopyCutPasteOptions = {}) => {
+    this.copySelection({ useLastCursorPosition, pasteInTheForeground: true });
     this.deleteSelection();
   };
 
   duplicateSelection = () => {
+    const { editor } = this;
+    if (!editor) return;
     const serializedSelection = this.instancesSelection
       .getSelectedInstances()
       .map(instance => serializeToJSObject(instance));
 
-    if (!this.editor) return;
-
-    const newInstances = serializedSelection.map(serializedInstance => {
-      const instance = new gd.InitialInstance();
-      unserializeFromJSObject(instance, serializedInstance);
-      instance.setX(instance.getX() + 2 * MOVEMENT_BIG_DELTA);
-      instance.setY(instance.getY() + 2 * MOVEMENT_BIG_DELTA);
-      const newInstance = this.props.initialInstances
-        .insertInitialInstance(instance)
-        .resetPersistentUuid();
-      instance.delete();
-      return newInstance;
+    const newInstances = editor.addSerializedInstances({
+      position: [0, 0],
+      copyReferential: [-2 * MOVEMENT_BIG_DELTA, -2 * MOVEMENT_BIG_DELTA],
+      serializedInstances: serializedSelection,
+      preventSnapToGrid: true,
     });
     this._onInstancesAdded(newInstances);
     this.instancesSelection.clearSelection();
@@ -1176,11 +1175,12 @@ export default class SceneEditor extends React.Component<Props, State> {
   };
 
   paste = ({ useLastCursorPosition }: CopyCutPasteOptions = {}) => {
-    if (!this.editor) return;
+    const { editor } = this;
+    if (!editor) return;
 
     const position = useLastCursorPosition
-      ? this.editor.getLastCursorSceneCoordinates()
-      : this.editor.getLastContextMenuSceneCoordinates();
+      ? editor.getLastCursorSceneCoordinates()
+      : editor.getLastContextMenuSceneCoordinates();
 
     const clipboardContent = Clipboard.get(INSTANCES_CLIPBOARD_KIND);
     const instancesContent = SafeExtractor.extractArrayProperty(
@@ -1189,19 +1189,20 @@ export default class SceneEditor extends React.Component<Props, State> {
     );
     const x = SafeExtractor.extractNumberProperty(clipboardContent, 'x');
     const y = SafeExtractor.extractNumberProperty(clipboardContent, 'y');
+    const pasteInTheForeground =
+      SafeExtractor.extractBooleanProperty(
+        clipboardContent,
+        'pasteInTheForeground'
+      ) || false;
     if (x === null || y === null || instancesContent === null) return;
 
-    const newInstances = instancesContent.map(serializedInstance => {
-      const instance = new gd.InitialInstance();
-      unserializeFromJSObject(instance, serializedInstance);
-      instance.setX(instance.getX() - x + position[0]);
-      instance.setY(instance.getY() - y + position[1]);
-      const newInstance = this.props.initialInstances
-        .insertInitialInstance(instance)
-        .resetPersistentUuid();
-      instance.delete();
-      return newInstance;
+    const newInstances = editor.addSerializedInstances({
+      position,
+      copyReferential: [x, y],
+      serializedInstances: instancesContent,
+      addInstancesInTheForeground: pasteInTheForeground,
     });
+
     this._onInstancesAdded(newInstances);
     this.instancesSelection.clearSelection();
     this.instancesSelection.selectInstances({