adding new event types

Author: swordensen

src/vs/workbench/contrib/webview/browser/webviewMessages.d.ts

@@ -17,6 +17,10 @@ type KeyEvent = {
 	repeat: boolean;
 }
 
+type DragEvent = {
+	shiftKey: boolean;
+}
+
 export type FromWebviewMessage = {
 	'onmessage': { message: any; transfer?: ArrayBuffer[] };
 	'did-click-link': { uri: string };
@@ -36,6 +40,7 @@ export type FromWebviewMessage = {
 	'did-keyup': KeyEvent;
 	'did-context-menu': { clientX: number; clientY: number; context: { [key: string]: unknown } };
 	'drag-start': void;
+	'drag': DragEvent
 };
 
 interface UpdateContentEvent {