Reverts the recent drop changes as these introduced regressions (microsoft#219896)

Safest fix for the recovery build

Author: mjbvz

src/vs/workbench/contrib/webview/browser/pre/index.html

@@ -6,7 +6,7 @@
 
 	<meta http-equiv="Content-Security-Policy"
 
-	content="default-src 'none'; script-src 'sha256-ikaxwm2UFoiIKkEZTEU4mnSxpYf3lmsrhy5KqqJZfek=' 'self'; frame-src 'self'; style-src 'unsafe-inline';">
+	content="default-src 'none'; script-src 'sha256-dvxt5dlghGbz8hrqqochfoKEaHIMZ+yJVRvjJnGopzs=' 'self'; frame-src 'self'; style-src 'unsafe-inline';">
 
 
 	<!-- Disable pinch zooming -->
@@ -797,17 +797,6 @@
 			}
 		}
 
-
-		function handleInnerDragEvent(/** @type {DragEvent} */ e) {
-			if (!e.dataTransfer) {
-				return;
-			}
-
-			hostMessaging.postMessage('drag', {
-				shiftKey: e.shiftKey
-			});
-		}
-
 		/**
 		 * @param {() => void} callback
 		 */
@@ -898,9 +887,7 @@
 		window.addEventListener('keydown', handleInnerKeydown);
 		window.addEventListener('keyup', handleInnerKeyup);
 		window.addEventListener('dragenter', handleInnerDragStartEvent);
-		window.addEventListener('dragover', handleInnerDragEvent);
-		window.addEventListener('drag', handleInnerDragEvent);
-
+		window.addEventListener('dragover', handleInnerDragStartEvent);
 
 		onDomReady(() => {
 			if (!document.body) {
@@ -1182,8 +1169,7 @@
 					});
 
 					contentWindow.addEventListener('dragenter', handleInnerDragStartEvent);
-					contentWindow.addEventListener('dragover', handleInnerDragEvent);
-					contentWindow.addEventListener('drag', handleInnerDragEvent);
+					contentWindow.addEventListener('dragover', handleInnerDragStartEvent);
 
 					unloadMonitor.onIframeLoaded(newFrame);
 				}

src/vs/workbench/contrib/webview/browser/webviewElement.ts

@@ -34,7 +34,7 @@ import { loadLocalResource, WebviewResourceResponse } from 'vs/workbench/contrib
 import { WebviewThemeDataProvider } from 'vs/workbench/contrib/webview/browser/themeing';
 import { areWebviewContentOptionsEqual, IWebview, WebviewContentOptions, WebviewExtensionDescription, WebviewInitInfo, WebviewMessageReceivedEvent, WebviewOptions } from 'vs/workbench/contrib/webview/browser/webview';
 import { WebviewFindDelegate, WebviewFindWidget } from 'vs/workbench/contrib/webview/browser/webviewFindWidget';
-import { FromWebviewMessage, KeyEvent, ToWebviewMessage, WebViewDragEvent } from 'vs/workbench/contrib/webview/browser/webviewMessages';
+import { FromWebviewMessage, KeyEvent, ToWebviewMessage } from 'vs/workbench/contrib/webview/browser/webviewMessages';
 import { decodeAuthority, webviewGenericCspSource, webviewRootResourceAuthority } from 'vs/workbench/contrib/webview/common/webview';
 import { IWorkbenchEnvironmentService } from 'vs/workbench/services/environment/common/environmentService';
 import { CodeWindow } from 'vs/base/browser/window';
@@ -310,10 +310,6 @@ export class WebviewElement extends Disposable implements IWebview, WebviewFindD
 			this._startBlockingIframeDragEvents();
 		}));
 
-		this._register(this.on('drag', (event) => {
-			this.handleDragEvent('drag', event);
-		}));
-
 		if (initInfo.options.enableFindWidget) {
 			this._webviewFindWidget = this._register(instantiationService.createInstance(WebviewFindWidget, this));
 		}
@@ -701,17 +697,6 @@ export class WebviewElement extends Disposable implements IWebview, WebviewFindD
 		this.window?.dispatchEvent(emulatedKeyboardEvent);
 	}
 
-	private handleDragEvent(type: 'drag', event: WebViewDragEvent) {
-		// Create a fake DragEvent from the data provided
-		const emulatedDragEvent = new DragEvent(type, event);
-		// Force override the target
-		Object.defineProperty(emulatedDragEvent, 'target', {
-			get: () => this.element,
-		});
-		// And re-dispatch
-		this.window?.dispatchEvent(emulatedDragEvent);
-	}
-
 	windowDidDragStart(): void {
 		// Webview break drag and dropping around the main window (no events are generated when you are over them)
 		// Work around this by disabling pointer events during the drag.

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

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

src/vs/workbench/contrib/webview/browser/webviewWindowDragMonitor.ts

@@ -18,41 +18,19 @@ export class WebviewWindowDragMonitor extends Disposable {
 	constructor(targetWindow: CodeWindow, getWebview: () => IWebview | undefined) {
 		super();
 
-		const onDragStart = () => {
+		this._register(DOM.addDisposableListener(targetWindow, DOM.EventType.DRAG_START, () => {
 			getWebview()?.windowDidDragStart();
-		};
+		}));
 
 		const onDragEnd = () => {
 			getWebview()?.windowDidDragEnd();
 		};
 
-		this._register(DOM.addDisposableListener(targetWindow, DOM.EventType.DRAG_START, () => {
-			onDragStart();
-		}));
-
 		this._register(DOM.addDisposableListener(targetWindow, DOM.EventType.DRAG_END, onDragEnd));
-
 		this._register(DOM.addDisposableListener(targetWindow, DOM.EventType.MOUSE_MOVE, currentEvent => {
 			if (currentEvent.buttons === 0) {
 				onDragEnd();
 			}
 		}));
-
-		this._register(DOM.addDisposableListener(targetWindow, DOM.EventType.DRAG, (event) => {
-			if (event.shiftKey) {
-				onDragEnd();
-			} else {
-				onDragStart();
-			}
-		}));
-
-		this._register(DOM.addDisposableListener(targetWindow, DOM.EventType.DRAG_OVER, (event) => {
-			if (event.shiftKey) {
-				onDragEnd();
-			} else {
-				onDragStart();
-			}
-		}));
-
 	}
 }