feat: simplify event

Author: mathuo

packages/dockview-core/src/dockview/components/titlebar/tabsContainer.ts

@@ -11,7 +11,10 @@ import { toggleClass } from '../../../dom';
 import { DockviewPanel, IDockviewPanel } from '../../dockviewPanel';
 import { DockviewComponent } from '../../dockviewComponent';
 import { WillShowOverlayEvent } from '../../../dnd/droptarget';
-import { DockviewGroupDropLocation } from '../../dockviewGroupPanelModel';
+import {
+    DockviewGroupDropLocation,
+    WillShowOverlayLocationEvent,
+} from '../../dockviewGroupPanelModel';
 
 export interface TabDropIndexEvent {
     readonly event: DragEvent;
@@ -35,10 +38,7 @@ export interface ITabsContainer extends IDisposable {
     readonly onDrop: Event<TabDropIndexEvent>;
     readonly onTabDragStart: Event<TabDragEvent>;
     readonly onGroupDragStart: Event<GroupDragEvent>;
-    readonly onWillShowOverlay: Event<{
-        event: WillShowOverlayEvent;
-        kind: DockviewGroupDropLocation;
-    }>;
+    readonly onWillShowOverlay: Event<WillShowOverlayLocationEvent>;
     hidden: boolean;
     delete(id: string): void;
     indexOf(id: string): number;
@@ -83,14 +83,10 @@ export class TabsContainer
     readonly onGroupDragStart: Event<GroupDragEvent> =
         this._onGroupDragStart.event;
 
-    private readonly _onWillShowOverlay = new Emitter<{
-        event: WillShowOverlayEvent;
-        kind: DockviewGroupDropLocation;
-    }>();
-    readonly onWillShowOverlay: Event<{
-        event: WillShowOverlayEvent;
-        kind: DockviewGroupDropLocation;
-    }> = this._onWillShowOverlay.event;
+    private readonly _onWillShowOverlay =
+        new Emitter<WillShowOverlayLocationEvent>();
+    readonly onWillShowOverlay: Event<WillShowOverlayLocationEvent> =
+        this._onWillShowOverlay.event;
 
     get panels(): string[] {
         return this.tabs.map((_) => _.value.panel.id);
@@ -248,7 +244,11 @@ export class TabsContainer
                 });
             }),
             this.voidContainer.onWillShowOverlay((event) => {
-                this._onWillShowOverlay.fire({ event, kind: 'header_space' });
+                this._onWillShowOverlay.fire(
+                    new WillShowOverlayLocationEvent(event, {
+                        kind: 'header_space',
+                    })
+                );
             }),
             addDisposableListener(
                 this.voidContainer.element,
@@ -407,7 +407,9 @@ export class TabsContainer
                 });
             }),
             tab.onWillShowOverlay((event) => {
-                this._onWillShowOverlay.fire({ event, kind: 'tab' });
+                this._onWillShowOverlay.fire(
+                    new WillShowOverlayLocationEvent(event, { kind: 'tab' })
+                );
             })
         );
 

packages/dockview-core/src/dockview/dockviewComponent.ts

@@ -2134,7 +2134,7 @@ export class DockviewComponent
                 }),
                 view.model.onWillShowOverlay((event) => {
                     if (this.options.disableDnd) {
-                        event.event.preventDefault();
+                        event.preventDefault();
                         return;
                     }
 

packages/dockview-core/src/dockview/dockviewGroupPanelModel.ts

@@ -8,6 +8,7 @@ import {
     DockviewEvent,
     Emitter,
     Event,
+    IDockviewEvent,
 } from '../events';
 import { IViewSize } from '../gridview/gridview';
 import { CompositeDisposable } from '../lifecycle';
@@ -179,9 +180,39 @@ export type DockviewGroupLocation =
     | { type: 'floating' }
     | { type: 'popout'; getWindow: () => Window };
 
-export interface WillShowOverlayLocationEvent {
-    event: WillShowOverlayEvent;
-    kind: DockviewGroupDropLocation;
+type A = typeof WillShowOverlayEvent;
+
+export class WillShowOverlayLocationEvent implements IDockviewEvent {
+    private _kind: DockviewGroupDropLocation;
+
+    get kind(): DockviewGroupDropLocation {
+        return this._kind;
+    }
+
+    get nativeEvent(): DragEvent {
+        return this.event.nativeEvent;
+    }
+
+    get position(): Position {
+        return this.event.position;
+    }
+
+    get defaultPrevented(): boolean {
+        return this.event.defaultPrevented;
+    }
+
+    preventDefault(): void {
+        this.event.preventDefault();
+    }
+
+    constructor(
+        private readonly event: WillShowOverlayEvent,
+        options: {
+            kind: DockviewGroupDropLocation;
+        }
+    ) {
+        this._kind = options.kind;
+    }
 }
 
 export class DockviewGroupPanelModel
@@ -411,7 +442,11 @@ export class DockviewGroupPanelModel
                 this._onWillShowOverlay.fire(event);
             }),
             this.contentContainer.dropTarget.onWillShowOverlay((event) => {
-                this._onWillShowOverlay.fire({ event, kind: 'content' });
+                this._onWillShowOverlay.fire(
+                    new WillShowOverlayLocationEvent(event, {
+                        kind: 'content',
+                    })
+                );
             }),
             this._onMove,
             this._onDidChange,

packages/dockview-core/src/events.ts

@@ -24,7 +24,12 @@ export namespace Event {
     };
 }
 
-export class DockviewEvent {
+export interface IDockviewEvent {
+    readonly defaultPrevented: boolean;
+    preventDefault(): void;
+}
+
+export class DockviewEvent implements IDockviewEvent {
     private _defaultPrevented = false;
 
     get defaultPrevented(): boolean {