From 5a635336b32daf0e0c0e3e46f2182100db7c1fa9 Mon Sep 17 00:00:00 2001
From: mathuo <6710312+mathuo@users.noreply.github.com>
Date: Sun, 25 Feb 2024 16:09:48 +0000
Subject: [PATCH] handle edge drops for onWillShowOverlay

---
 .../src/dockview/dockviewComponent.ts             | 15 ++++++++++++++-
 .../src/dockview/dockviewGroupPanelModel.ts       |  6 +++++-
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/packages/dockview-core/src/dockview/dockviewComponent.ts b/packages/dockview-core/src/dockview/dockviewComponent.ts
index a2dd416bd..9b33959ab 100644
--- a/packages/dockview-core/src/dockview/dockviewComponent.ts
+++ b/packages/dockview-core/src/dockview/dockviewComponent.ts
@@ -568,6 +568,19 @@ export class DockviewComponent
         });
 
         this.addDisposables(
+            this._rootDropTarget,
+            this._rootDropTarget.onWillShowOverlay((event) => {
+                if (this.gridview.length > 0 && event.position === 'center') {
+                    // option only available when no panels in primary grid
+                    return;
+                }
+
+                this._onWillShowOverlay.fire(
+                    new WillShowOverlayLocationEvent(event, {
+                        kind: 'edge',
+                    })
+                );
+            }),
             this._rootDropTarget.onDrop((event) => {
                 const willDropEvent = new DockviewWillDropEvent({
                     nativeEvent: event.nativeEvent,
@@ -576,7 +589,7 @@ export class DockviewComponent
                     api: this._api,
                     group: undefined,
                     getData: getPanelData,
-                    kind: 'content',
+                    kind: 'edge',
                 });
 
                 this._onWillDrop.fire(willDropEvent);
diff --git a/packages/dockview-core/src/dockview/dockviewGroupPanelModel.ts b/packages/dockview-core/src/dockview/dockviewGroupPanelModel.ts
index 9227b6aa3..6cad9ce71 100644
--- a/packages/dockview-core/src/dockview/dockviewGroupPanelModel.ts
+++ b/packages/dockview-core/src/dockview/dockviewGroupPanelModel.ts
@@ -125,7 +125,11 @@ export interface IHeader {
 
 export type DockviewGroupPanelLocked = boolean | 'no-drop-target';
 
-export type DockviewGroupDropLocation = 'tab' | 'header_space' | 'content';
+export type DockviewGroupDropLocation =
+    | 'tab'
+    | 'header_space'
+    | 'content'
+    | 'edge';
 
 export interface IDockviewGroupPanelModel extends IPanel {
     readonly isActive: boolean;