Show formatting status in status bar

src/animatedStatusBar.ts

@@ -0,0 +1,123 @@
+/*---------------------------------------------------------
+ * Copyright (C) Microsoft Corporation. All rights reserved.
+ *--------------------------------------------------------*/
+
+import {
+    StatusBarItem,
+    StatusBarAlignment,
+    Disposable,
+    window} from "vscode";
+
+export function setAnimatedStatusBarMessage(text: string, hideWhenDone: Thenable<any>): Disposable {
+    let animatedStatusBarItem: AnimatedStatusBarItem = new AnimatedStatusBarItem(text);
+    animatedStatusBarItem.show(hideWhenDone);
+    return animatedStatusBarItem;
+}
+
+class AnimatedStatusBarItem implements StatusBarItem {
+    private readonly animationRate: number;
+    private statusBarItem: StatusBarItem;
+    private maxCount: number;
+    private counter: number;
+    private baseText: string;
+    private timerInterval: number;
+    private elapsedTime: number;
+    private intervalId: NodeJS.Timer;
+    private suffixStates: string[];
+
+    public get alignment(): StatusBarAlignment {
+        return this.statusBarItem.alignment;
+    }
+
+    public get priority(): number {
+        return this.statusBarItem.priority;
+    }
+
+    public get text(): string {
+        return this.statusBarItem.text;
+    }
+
+    public set text(value: string) {
+        this.statusBarItem.text = value;
+    }
+
+    public get tooltip(): string {
+        return this.statusBarItem.tooltip;
+    }
+
+    public set tooltip(value: string) {
+        this.statusBarItem.tooltip = value;
+    }
+
+    public get color(): string {
+        return this.statusBarItem.color;
+    }
+
+    public set color(value: string) {
+        this.statusBarItem.color = value;
+    }
+
+    public get command(): string {
+        return this.statusBarItem.command;
+    }
+
+    public set command(value: string) {
+        this.statusBarItem.command = value;
+    }
+
+    constructor(baseText: string, alignment?: StatusBarAlignment, priority?: number) {
+        this.animationRate = 1;
+        this.statusBarItem = window.createStatusBarItem(alignment, priority);
+        this.baseText = baseText;
+        this.counter = 0;
+        this.suffixStates = ["  ", ".  ", ".. ", "..."];
+        this.maxCount = this.suffixStates.length;
+        this.timerInterval = ((1/this.maxCount) * 1000) / this.animationRate;
+        this.elapsedTime = 0;
+    }
+
+    public show(hideWhenDone?: Thenable<any>): void {
+        this.statusBarItem.show();
+        this.start();
+        if (hideWhenDone !== undefined) {
+            hideWhenDone.then(() => this.hide());
+        }
+    }
+
+    public hide(): void {
+        this.stop();
+        this.statusBarItem.hide();
+    }
+
+    public dispose(): void {
+        this.statusBarItem.dispose();
+    }
+
+    private updateCounter(): void {
+        this.counter = (this.counter + 1) % this.maxCount;
+        this.elapsedTime = this.elapsedTime + this.timerInterval;
+    }
+
+    private updateText(): void {
+        this.text = this.baseText + this.suffixStates[this.counter];
+    }
+
+    private update(): void {
+        this.updateCounter();
+        this.updateText();
+    }
+
+    private reset(): void {
+        this.counter = 0;
+        this.updateText();
+    }
+
+    private  start(): void {
+        this.reset();
+        this.intervalId = setInterval(() => this.update(), this.timerInterval);
+    }
+
+    private stop(): void {
+        clearInterval(this.intervalId);
+    }
+}

src/features/DocumentFormatter.ts

@@ -18,6 +18,7 @@ import Window = vscode.window;
 import { IFeature } from '../feature';
 import * as Settings from '../settings';
 import * as Utils from '../utils';
+import * as AnimatedStatusBar from '../animatedStatusBar';
 
 export namespace ScriptFileMarkersRequest {
     export const type: RequestType<any, any, void> = { get method(): string { return "powerShell/getScriptFileMarkers"; } };
@@ -110,14 +111,17 @@ class PSDocumentFormattingEditProvider implements DocumentFormattingEditProvider
         range: Range,
         options: FormattingOptions,
         token: CancellationToken): TextEdit[] | Thenable<TextEdit[]> {
-        return this.executeRulesInOrder(document, range, options, 0);
+
+        let textEdits: Thenable<TextEdit[]> = this.executeRulesInOrder(document, range, options, 0);
+        AnimatedStatusBar.setAnimatedStatusBarMessage("formatting", textEdits);
+        return textEdits;
     }
 
     executeRulesInOrder(
         document: TextDocument,
         range: Range,
         options: FormattingOptions,
-        index: number): Thenable<TextEdit[]> | TextEdit[] {
+        index: number): Thenable<TextEdit[]> {
         if (this.languageClient !== null && index < this.ruleOrder.length) {
             let rule = this.ruleOrder[index];
             let uniqueEdits: ScriptRegion[] = [];
@@ -172,7 +176,7 @@ class PSDocumentFormattingEditProvider implements DocumentFormattingEditProvider
                     return this.executeRulesInOrder(document, range, options, index + 1);
                 });
         } else {
-            return TextEdit[0];
+            return Promise.resolve(TextEdit[0]);
         }
     }