fix(pointer-events): fix possible undefined stage error

Sometimes a shape may not have a stage associated with it? I was  hitting this in our app. I also cleaned up the event types a bit and added the pointer methods to Stage to be consistent with the other types

src/Node.ts

@@ -163,21 +163,19 @@ const emptyChildren: Collection<any> = new Collection();
 let idCounter = 1;
 
 // create all the events here
-interface NodeEventMap {
+type NodeEventMap = GlobalEventHandlersEventMap & {
   [index: string]: any;
-  click: MouseEvent;
-  touchstart: TouchEvent;
-}
+};
 
-export interface KonvaEventObject<EventType extends keyof NodeEventMap> {
+export interface KonvaEventObject<EventType> {
   target: Shape | Stage;
-  evt: NodeEventMap[EventType];
+  evt: EventType;
   currentTarget: Node;
   cancelBubble: boolean;
   child?: Node;
 }
 
-export type KonvaEventListener<This, EventType extends keyof NodeEventMap> = (
+export type KonvaEventListener<This, EventType> = (
   this: This,
   ev: KonvaEventObject<EventType>
 ) => void;

src/PointerEvents.ts

@@ -5,12 +5,10 @@ import { Stage } from './Stage';
 
 const Captures = new Map<number, Shape | Stage>();
 
-export interface KonvaPointerEvent extends KonvaEventObject<'touchstart'> {
+export interface KonvaPointerEvent extends KonvaEventObject<MouseEvent> {
   pointerId: number;
 }
 
-let implicitRelease = null;
-
 export function getCapturedShape(pointerId: number) {
   return Captures.get(pointerId);
 }
@@ -29,9 +27,8 @@ export function hasPointerCapture(pointerId: number, shape: Shape | Stage) {
 export function setPointerCapture(pointerId: number, shape: Shape | Stage) {
   releaseCapture(pointerId);
 
-  const { content } = shape.getStage();
-
-  content.setPointerCapture(pointerId);
+  const stage = shape.getStage();
+  if (!stage) return;
 
   Captures.set(pointerId, shape);
 
@@ -46,9 +43,11 @@ export function releaseCapture(pointerId: number, target?: Shape | Stage) {
 
   if (!shape) return;
 
-  const { content } = shape.getStage();
+  const stage = shape.getStage();
 
-  content.releasePointerCapture(pointerId);
+  if (stage && stage.content) {
+    stage.content.releasePointerCapture(pointerId);
+  }
 
   Captures.delete(pointerId);
 

src/Stage.ts

@@ -376,6 +376,19 @@ export class Stage extends Container<BaseLayer> {
   getLayer() {
     return null;
   }
+
+  hasPointerCapture(pointerId: number): boolean {
+    return PointerEvents.hasPointerCapture(pointerId, this);
+  }
+
+  setPointerCapture(pointerId: number) {
+    PointerEvents.setPointerCapture(pointerId, this);
+  }
+
+  releaseCapture(pointerId: number) {
+    PointerEvents.releaseCapture(pointerId, this);
+  }
+
   /**
    * returns a {@link Konva.Collection} of layers
    * @method

src/index-types.d.ts

@@ -46,6 +46,8 @@ declare namespace Konva {
     EventType
   >;
 
+  export type KonvaPointerEvent = import('./PointerEvents').KonvaPointerEvent;
+
   export type KonvaEventListener<
     This,
     EventType