From 8e746dfdc71f687c07aad5f5efd8c28b889fe94d Mon Sep 17 00:00:00 2001
From: Johannes Rieken <johannes.rieken@gmail.com>
Date: Wed, 21 Jun 2017 11:22:31 +0200
Subject: [PATCH] very first proposed API for multiple roots, #28526

---
 src/vs/vscode.proposed.d.ts                   |  7 +++++++
 src/vs/workbench/api/node/extHost.api.impl.ts | 13 +++++++++++++
 src/vs/workbench/api/node/extHostWorkspace.ts | 14 +++++++++-----
 3 files changed, 29 insertions(+), 5 deletions(-)

diff --git a/src/vs/vscode.proposed.d.ts b/src/vs/vscode.proposed.d.ts
index fecdcb110fc..85e2d258d49 100644
--- a/src/vs/vscode.proposed.d.ts
+++ b/src/vs/vscode.proposed.d.ts
@@ -7,6 +7,13 @@
 
 declare module 'vscode' {
 
+	export namespace workspace {
+
+		export const onDidChangeWorkspaceFolders: Event<Uri[] | undefined>;
+
+		export let workspaceFolders: Uri[] | undefined;
+	}
+
 	/**
 	 * Controls the behaviour of the terminal's visibility.
 	 */
diff --git a/src/vs/workbench/api/node/extHost.api.impl.ts b/src/vs/workbench/api/node/extHost.api.impl.ts
index fbaaaaa5897..4222e4ede3d 100644
--- a/src/vs/workbench/api/node/extHost.api.impl.ts
+++ b/src/vs/workbench/api/node/extHost.api.impl.ts
@@ -54,6 +54,12 @@ export interface IExtensionApiFactory {
 	(extension: IExtensionDescription): typeof vscode;
 }
 
+function assertProposedApi(extension: IExtensionDescription): void {
+	if (!extension.enableProposedApi) {
+		throw new Error(`[${extension.id}]: Proposed API is only available when running out of dev or with the following command line switch: --enable-proposed-api ${extension.id}`);
+	}
+}
+
 function proposedApiFunction<T>(extension: IExtensionDescription, fn: T): T {
 	if (extension.enableProposedApi) {
 		return fn;
@@ -348,6 +354,13 @@ export function createApiFactory(
 			set rootPath(value) {
 				throw errors.readonly();
 			},
+			get workspaceFolders() {
+				assertProposedApi(extension);
+				return extHostWorkspace.getRoots();
+			},
+			onDidChangeWorkspaceFolders: proposedApiFunction(extension, (listener, thisArgs?, disposables?) => {
+				return extHostWorkspace.onDidChangeWorkspace(listener, thisArgs, disposables);
+			}),
 			asRelativePath: (pathOrUri) => {
 				return extHostWorkspace.getRelativePath(pathOrUri);
 			},
diff --git a/src/vs/workbench/api/node/extHostWorkspace.ts b/src/vs/workbench/api/node/extHostWorkspace.ts
index 5c44d1b052d..f5633e1df63 100644
--- a/src/vs/workbench/api/node/extHostWorkspace.ts
+++ b/src/vs/workbench/api/node/extHostWorkspace.ts
@@ -21,11 +21,11 @@ export class ExtHostWorkspace extends ExtHostWorkspaceShape {
 
 	private static _requestIdPool = 0;
 
-	private readonly _onDidChangeWorkspace = new Emitter<this>();
+	private readonly _onDidChangeWorkspace = new Emitter<URI[]>();
 	private readonly _proxy: MainThreadWorkspaceShape;
 	private _workspace: Workspace;
 
-	readonly onDidChangeWorkspace: Event<this> = this._onDidChangeWorkspace.event;
+	readonly onDidChangeWorkspace: Event<URI[]> = this._onDidChangeWorkspace.event;
 
 	constructor(threadService: IThreadService, data: IWorkspaceData) {
 		super();
@@ -35,8 +35,12 @@ export class ExtHostWorkspace extends ExtHostWorkspaceShape {
 
 	// --- workspace ---
 
-	get workspace(): Workspace {
-		return this._workspace;
+	getRoots(): URI[] {
+		if (!this._workspace) {
+			return undefined;
+		} else {
+			return this._workspace.roots.slice(0);
+		}
 	}
 
 	getPath(): string {
@@ -85,7 +89,7 @@ export class ExtHostWorkspace extends ExtHostWorkspaceShape {
 
 	$acceptWorkspaceData(data: IWorkspaceData): void {
 		this._workspace = data ? new Workspace(data.id, data.name, data.roots) : null;
-		this._onDidChangeWorkspace.fire(this);
+		this._onDidChangeWorkspace.fire(this.getRoots());
 	}
 
 	// --- search ---
-- 
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