export function getSimpleWorkspaceLabel(workspace: IWorkspaceIdentifier | URI, workspaceHome: URI): string {
	if (isSingleFolderWorkspaceIdentifier(workspace)) {
		return basename(workspace);
	}
	// Workspace: Untitled
	if (isEqualOrParent(workspace.configPath, workspaceHome)) {
		return localize('untitledWorkspace', "Untitled (Workspace)");
	}

	const filename = basename(workspace.configPath);
	const workspaceName = filename.substr(0, filename.length - WORKSPACE_EXTENSION.length - 1);
	return localize('workspaceName', "{0} (Workspace)", workspaceName);
}

export function getPathLabel(resource: URI | string, userHomeProvider?: IUserHomeProvider, rootProvider?: IWorkspaceFolderProvider): string {
	if (typeof resource === 'string') {
		resource = URI.file(resource);
	}

	// return early if we can resolve a relative path label from the root
	if (rootProvider) {
		const baseResource = rootProvider.getWorkspaceFolder(resource);
		if (baseResource) {
			const hasMultipleRoots = rootProvider.getWorkspace().folders.length > 1;

			let pathLabel: string;
			if (isEqual(baseResource.uri, resource)) {
				pathLabel = ''; // no label if paths are identical
			} else {
				// TODO: isidor use resources.relative
				pathLabel = normalize(ltrim(resource.path.substr(baseResource.uri.path.length), posix.sep)!);
			}

			if (hasMultipleRoots) {
				const rootName = (baseResource && baseResource.name) ? baseResource.name : basename(baseResource.uri);
				pathLabel = pathLabel ? (rootName + ' • ' + pathLabel) : rootName; // always show root basename if there are multiple
			}

			return pathLabel;
		}
	}

	// return if the resource is neither file:// nor untitled:// and no baseResource was provided
	if (resource.scheme !== Schemas.file && resource.scheme !== Schemas.untitled) {
		return resource.with({ query: null, fragment: null }).toString(true);
	}

	// convert c:\something => C:\something
	if (hasDriveLetter(resource.fsPath)) {
		return normalize(normalizeDriveLetter(resource.fsPath));
	}

	// normalize and tildify (macOS, Linux only)
	let res = normalize(resource.fsPath);
	if (!isWindows && userHomeProvider) {
		res = tildify(res, userHomeProvider.userHome);
	}

	return res;
}

export function getBaseLabel(resource: URI | string | undefined): string | undefined {
	if (!resource) {
		return undefined;
	}

	if (typeof resource === 'string') {
		resource = URI.file(resource);
	}

	const base = basename(resource) || (resource.scheme === Schemas.file ? resource.fsPath : resource.path) /* can be empty string if '/' is passed in */;

	// convert c: => C:
	if (hasDriveLetter(base)) {
		return normalizeDriveLetter(base);
	}

	return base;
}

	handler: (accessor, resource: URI | object) => {
		if (!provider) {
			const instantiationService = accessor.get(IInstantiationService);
			const textModelService = accessor.get(ITextModelService);
			provider = instantiationService.createInstance(FileOnDiskContentProvider);
			textModelService.registerTextModelContentProvider(COMPARE_WITH_SAVED_SCHEMA, provider);
		}

		const editorService = accessor.get(IEditorService);
		const uri = getResourceForCommand(resource, accessor.get(IListService), editorService);

		if (uri && uri.scheme === Schemas.file /* only files on disk supported for now */) {
			const name = basename(uri);
			const editorLabel = nls.localize('modifiedLabel', "{0} (on disk) ↔ {1}", name, name);

			return editorService.openEditor({ leftResource: uri.with({ scheme: COMPARE_WITH_SAVED_SCHEMA }), rightResource: uri, label: editorLabel }).then(() => undefined);
		}

		return Promise.resolve(true);
	}

	handler: (accessor, resource: URI | object) => {
		const instantiationService = accessor.get(IInstantiationService);
		const textModelService = accessor.get(ITextModelService);
		const editorService = accessor.get(IEditorService);
		const fileService = accessor.get(IFileService);

		// Register provider at first as needed
		let registerEditorListener = false;
		if (providerDisposables.length === 0) {
			registerEditorListener = true;

			const provider = instantiationService.createInstance(TextFileContentProvider);
			providerDisposables.push(provider);
			providerDisposables.push(textModelService.registerTextModelContentProvider(COMPARE_WITH_SAVED_SCHEMA, provider));
		}

		// Open editor (only resources that can be handled by file service are supported)
		const uri = getResourceForCommand(resource, accessor.get(IListService), editorService);
		if (uri && fileService.canHandleResource(uri)) {
			const name = basename(uri);
			const editorLabel = nls.localize('modifiedLabel', "{0} (in file) ↔ {1}", name, name);

			TextFileContentProvider.open(uri, COMPARE_WITH_SAVED_SCHEMA, editorLabel, editorService).then(() => {

				// Dispose once no more diff editor is opened with the scheme
				if (registerEditorListener) {
					providerDisposables.push(editorService.onDidVisibleEditorsChange(() => {
						if (!editorService.editors.some(editor => !!toResource(editor, { supportSideBySide: SideBySideEditor.DETAILS, filterByScheme: COMPARE_WITH_SAVED_SCHEMA }))) {
							providerDisposables = dispose(providerDisposables);
						}
					}));
				}
			}, error => {
				providerDisposables = dispose(providerDisposables);
			});
		}

		return Promise.resolve(true);
	}

	test('basename', () => {
		if (isWindows) {
			assert.equal(basename(URI.file('c:\\some\\file\\test.txt')), 'test.txt');
			assert.equal(basename(URI.file('c:\\some\\file')), 'file');
			assert.equal(basename(URI.file('c:\\some\\file\\')), 'file');
			assert.equal(basename(URI.file('C:\\some\\file\\')), 'file');
		} else {
			assert.equal(basename(URI.file('/some/file/test.txt')), 'test.txt');
			assert.equal(basename(URI.file('/some/file/')), 'file');
			assert.equal(basename(URI.file('/some/file')), 'file');
			assert.equal(basename(URI.file('/some')), 'some');
		}
		assert.equal(basename(URI.parse('foo://a/some/file/test.txt')), 'test.txt');
		assert.equal(basename(URI.parse('foo://a/some/file/')), 'file');
		assert.equal(basename(URI.parse('foo://a/some/file')), 'file');
		assert.equal(basename(URI.parse('foo://a/some')), 'some');
		assert.equal(basename(URI.parse('foo://a/')), '');
		assert.equal(basename(URI.parse('foo://a')), '');
	});

				notificationService.error(nls.localize('genericRevertError', "Failed to revert '{0}': {1}", resources.map(r => basename(r)).join(', '), toErrorMessage(error, false)));

	message.push(...resourcesToConfirm.slice(0, MAX_CONFIRM_FILES).map(r => basename(r)));