private doSetWorked(value: number): ProgressBar {
		assert.ok(!isNaN(this.totalWork), 'Total work not set');

		this.workedVal = value;
		this.workedVal = Math.min(this.totalWork, this.workedVal);

		if (hasClass(this.element, css_infinite)) {
			removeClass(this.element, css_infinite);
		}

		if (hasClass(this.element, css_done)) {
			removeClass(this.element, css_done);
		}

		if (!hasClass(this.element, css_active)) {
			addClass(this.element, css_active);
		}

		if (!hasClass(this.element, css_discrete)) {
			addClass(this.element, css_discrete);
		}

		this.bit.style.width = 100 * (this.workedVal / this.totalWork) + '%';

		return this;
	}

	test('removeClass', () => {

		var element = document.createElement('div');
		element.className = 'foobar boo far';

		dom.removeClass(element, 'boo');
		assert(dom.hasClass(element, 'far'));
		assert(!dom.hasClass(element, 'boo'));
		assert(dom.hasClass(element, 'foobar'));
		assert.equal(element.className, 'foobar far');

		element = document.createElement('div');
		element.className = 'foobar boo far';

		dom.removeClass(element, 'far');
		assert(!dom.hasClass(element, 'far'));
		assert(dom.hasClass(element, 'boo'));
		assert(dom.hasClass(element, 'foobar'));
		assert.equal(element.className, 'foobar boo');

		dom.removeClass(element, 'boo');
		assert(!dom.hasClass(element, 'far'));
		assert(!dom.hasClass(element, 'boo'));
		assert(dom.hasClass(element, 'foobar'));
		assert.equal(element.className, 'foobar');

		dom.removeClass(element, 'foobar');
		assert(!dom.hasClass(element, 'far'));
		assert(!dom.hasClass(element, 'boo'));
		assert(!dom.hasClass(element, 'foobar'));
		assert.equal(element.className, '');
	});

	protected doRefresh(): void {
		const group = this.context;
		const editor = group && group.activeEditor;
		if (!editor) {
			this.editorLabel.clear();
			this.clearEditorActionsToolbar();

			return; // return early if we are being closed
		}

		const isPinned = group.isPinned(group.activeEditor);
		const isActive = this.stacks.isActive(group);

		// Activity state
		if (isActive) {
			DOM.addClass(this.titleContainer, 'active');
		} else {
			DOM.removeClass(this.titleContainer, 'active');
		}

		// Dirty state
		if (editor.isDirty()) {
			DOM.addClass(this.titleContainer, 'dirty');
		} else {
			DOM.removeClass(this.titleContainer, 'dirty');
		}

		// Editor Label
		const resource = toResource(editor, { supportSideBySide: true });
		const name = editor.getName() || '';

		const labelFormat = this.editorGroupService.getTabOptions().labelFormat;
		let description: string;
		if (labelFormat === 'default' && !isActive) {
			description = ''; // hide description when group is not active and style is 'default'
		} else {
			description = editor.getDescription(this.getVerbosity(labelFormat)) || '';
		}

		let title = editor.getTitle(Verbosity.LONG);
		if (description === title) {
			title = ''; // dont repeat what is already shown
		}

		this.editorLabel.setLabel({ name, description, resource }, { title, italic: !isPinned, extraClasses: ['title-label'] });
		if (isActive) {
			this.editorLabel.element.style.color = this.getColor(TAB_ACTIVE_FOREGROUND);
		} else {
			this.editorLabel.element.style.color = this.getColor(TAB_UNFOCUSED_ACTIVE_FOREGROUND);
		}

		// Update Editor Actions Toolbar
		this.updateEditorActionsToolbar();
	}

		this.ifEditorIsActive(editor, () => {
			if (editor.isDirty()) {
				addClass(this.titleContainer, 'dirty');
			} else {
				removeClass(this.titleContainer, 'dirty');
			}
		});

	/**
	 * Releases the row for eventual reuse. The row's domNode
	 * will eventually be removed from its parent, given that
	 * it is not the currently scrolling row (for OS X ballistic
	 * scrolling).
	 */
	release(row: IRow): void {
		if (!row.domNode) {
			return;
		}

		var lastScrollTime = getLastScrollTime(row.domNode);

		if (!lastScrollTime) {
			removeFromParent(row.domNode);
			this.getTemplateCache(row.templateId).push(row);
			return;
		}

		if (this.scrollingRow) {
			var lastKnownScrollTime = getLastScrollTime(this.scrollingRow.domNode);

			if (lastKnownScrollTime > lastScrollTime) {
				removeFromParent(row.domNode);
				this.getTemplateCache(row.templateId).push(row);
				return;
			}

			if (this.scrollingRow.domNode.parentElement) {
				removeFromParent(this.scrollingRow.domNode);
				removeClass(this.scrollingRow.domNode, 'scrolling');
				this.getTemplateCache(this.scrollingRow.templateId).push(this.scrollingRow);
			}
		}

		this.scrollingRow = row;
		addClass(this.scrollingRow.domNode, 'scrolling');
	}

	private redraw(): void {
		const editor = this.group.activeEditor;
		this.lastRenderedActiveEditor = editor;

		const isEditorPinned = this.group.isPinned(this.group.activeEditor);
		const isGroupActive = this.accessor.activeGroup === this.group;

		// Update Breadcrumbs
		if (this.breadcrumbsControl) {
			if (isGroupActive) {
				this.breadcrumbsControl.update();
				toggleClass(this.breadcrumbsControl.domNode, 'preview', !isEditorPinned);
			} else {
				this.breadcrumbsControl.hide();
			}
		}

		// Clear if there is no editor
		if (!editor) {
			removeClass(this.titleContainer, 'dirty');
			this.editorLabel.clear();
			this.clearEditorActionsToolbar();
		}

		// Otherwise render it
		else {
			// Dirty state
			this.updateEditorDirty(editor);

			// Editor Label
			const resource = toResource(editor, { supportSideBySide: true });
			const name = editor.getName() || '';

			const { labelFormat } = this.accessor.partOptions;
			let description: string;
			if (this.breadcrumbsControl && !this.breadcrumbsControl.isHidden()) {
				description = ''; // hide description when showing breadcrumbs
			} else if (labelFormat === 'default' && !isGroupActive) {
				description = ''; // hide description when group is not active and style is 'default'
			} else {
				description = editor.getDescription(this.getVerbosity(labelFormat)) || '';
			}

			let title = editor.getTitle(Verbosity.LONG);
			if (description === title) {
				title = ''; // dont repeat what is already shown
			}

			this.editorLabel.setLabel({ name, description, resource }, { title, italic: !isEditorPinned, extraClasses: ['no-tabs', 'title-label'] });
			if (isGroupActive) {
				this.editorLabel.element.style.color = this.getColor(TAB_ACTIVE_FOREGROUND);
			} else {
				this.editorLabel.element.style.color = this.getColor(TAB_UNFOCUSED_ACTIVE_FOREGROUND);
			}

			// Update Editor Actions Toolbar
			this.updateEditorActionsToolbar();
		}
	}

	private releaseRow(row: IRow): void {
		const {domNode, templateId} = row;
		removeClass(domNode, 'scrolling');
		removeFromParent(domNode);

		const cache = this.getTemplateCache(templateId);
		cache.push(row);
	}

	private onHide(): void {
		this.hide();
		removeClass(this.element, 'active');
	}