Fix webviews in same view column not always getting correct state change fired for visibility

Fixes #70859

src/vs/workbench/api/electron-browser/mainThreadWebview.ts

@@ -112,7 +112,6 @@ export class MainThreadWebviews extends Disposable implements MainThreadWebviews
 		};
 
 		this._webviews.set(handle, webview);
-		this._activeWebview = handle;
 
 		/* __GDPR__
 			"webviews:createWebviewPanel" : {

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

@@ -72,7 +72,6 @@ export class WebviewEditorInput extends EditorInput {
 
 	constructor(
 		public readonly viewType: string,
-		id: number,
 		name: string,
 		options: WebviewInputOptions,
 		state: any,
@@ -85,8 +84,7 @@ export class WebviewEditorInput extends EditorInput {
 	) {
 		super();
 
-		this._id = id;
-		WebviewEditorInput.handlePool = Math.max(id, WebviewEditorInput.handlePool) + 1;
+		this._id = WebviewEditorInput.handlePool++;
 
 		this._name = name;
 		this._options = options;
@@ -99,10 +97,6 @@ export class WebviewEditorInput extends EditorInput {
 		return WebviewEditorInput.typeId;
 	}
 
-	public getId(): number {
-		return this._id;
-	}
-
 	private readonly _onDidChangeIcon = this._register(new Emitter<void>());
 	public readonly onDidChangeIcon = this._onDidChangeIcon.event;
 
@@ -157,7 +151,7 @@ export class WebviewEditorInput extends EditorInput {
 	}
 
 	public matches(other: IEditorInput): boolean {
-		return other === this || (other instanceof WebviewEditorInput && other._id === this._id);
+		return other === this;
 	}
 
 	public get group(): GroupIdentifier | undefined {
@@ -312,7 +306,6 @@ export class RevivedWebviewEditorInput extends WebviewEditorInput {
 
 	constructor(
 		viewType: string,
-		id: number,
 		name: string,
 		options: WebviewInputOptions,
 		state: any,
@@ -324,7 +317,7 @@ export class RevivedWebviewEditorInput extends WebviewEditorInput {
 		private readonly reviver: (input: WebviewEditorInput) => Promise<void>,
 		@IWorkbenchLayoutService partService: IWorkbenchLayoutService,
 	) {
-		super(viewType, id, name, options, state, events, extension, partService);
+		super(viewType, name, options, state, events, extension, partService);
 	}
 
 	public async resolve(): Promise<IEditorModel> {

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

@@ -17,7 +17,6 @@ interface SerializedIconPath {
 
 interface SerializedWebview {
 	readonly viewType: string;
-	readonly id: number;
 	readonly title: string;
 	readonly options: WebviewInputOptions;
 	readonly extensionLocation: string | UriComponents | undefined;
@@ -44,7 +43,6 @@ export class WebviewEditorInputFactory implements IEditorInputFactory {
 
 		const data: SerializedWebview = {
 			viewType: input.viewType,
-			id: input.getId(),
 			title: input.getName(),
 			options: input.options,
 			extensionLocation: input.extension ? input.extension.location : undefined,
@@ -69,7 +67,7 @@ export class WebviewEditorInputFactory implements IEditorInputFactory {
 		const extensionLocation = reviveUri(data.extensionLocation);
 		const extensionId = data.extensionId ? new ExtensionIdentifier(data.extensionId) : undefined;
 		const iconPath = reviveIconPath(data.iconPath);
-		return this._webviewService.reviveWebview(data.viewType, data.id, data.title, iconPath, data.state, data.options, extensionLocation ? {
+		return this._webviewService.reviveWebview(data.viewType, data.title, iconPath, data.state, data.options, extensionLocation ? {
 			location: extensionLocation,
 			id: extensionId
 		} : undefined, data.group);

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

@@ -39,7 +39,6 @@ export interface IWebviewEditorService {
 
 	reviveWebview(
 		viewType: string,
-		id: number,
 		title: string,
 		iconPath: { light: URI, dark: URI } | undefined,
 		state: any,
@@ -143,7 +142,7 @@ export class WebviewEditorService implements IWebviewEditorService {
 		},
 		events: WebviewEvents
 	): WebviewEditorInput {
-		const webviewInput = this._instantiationService.createInstance(WebviewEditorInput, viewType, undefined, title, options, {}, events, extension);
+		const webviewInput = this._instantiationService.createInstance(WebviewEditorInput, viewType, title, options, {}, events, extension);
 		this._editorService.openEditor(webviewInput, { pinned: true, preserveFocus: showOptions.preserveFocus }, showOptions.group);
 		return webviewInput;
 	}
@@ -165,7 +164,6 @@ export class WebviewEditorService implements IWebviewEditorService {
 
 	public reviveWebview(
 		viewType: string,
-		id: number,
 		title: string,
 		iconPath: { light: URI, dark: URI } | undefined,
 		state: any,
@@ -176,7 +174,7 @@ export class WebviewEditorService implements IWebviewEditorService {
 		},
 		group: number | undefined,
 	): WebviewEditorInput {
-		const webviewInput = this._instantiationService.createInstance(RevivedWebviewEditorInput, viewType, id, title, options, state, {}, extension, async (webview: WebviewEditorInput): Promise<void> => {
+		const webviewInput = this._instantiationService.createInstance(RevivedWebviewEditorInput, viewType, title, options, state, {}, extension, async (webview: WebviewEditorInput): Promise<void> => {
 			const didRevive = await this.tryRevive(webview);
 			if (didRevive) {
 				return Promise.resolve(undefined);
@@ -220,7 +218,7 @@ export class WebviewEditorService implements IWebviewEditorService {
 
 		// Revived webviews may not have an actively registered reviver but we still want to presist them
 		// since a reviver should exist when it is actually needed.
-		return !(webview instanceof RevivedWebviewEditorInput);
+		return webview instanceof RevivedWebviewEditorInput;
 	}
 
 	private async tryRevive(