Refresh master with initial release/0.24 snapshot (#332)

* Initial port of release/0.24 source code

* Fix additional headers

* Fix a typo in launch.json

src/sql/base/browser/ui/views/common/views.ts

@@ -0,0 +1,50 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { TPromise } from 'vs/base/common/winjs.base';
+import Event from 'vs/base/common/event';
+import { Command } from 'vs/editor/common/modes';
+
+export type TreeViewItemHandleArg = {
+	$treeViewId: string,
+	$treeItemHandle: number
+};
+
+export enum TreeItemCollapsibleState {
+	None = 0,
+	Collapsed = 1,
+	Expanded = 2
+}
+
+export interface ITreeItem {
+
+	handle: number;
+
+	label: string;
+
+	icon?: string;
+
+	iconDark?: string;
+
+	contextValue?: string;
+
+	command?: Command;
+
+	children?: ITreeItem[];
+
+	collapsibleState?: TreeItemCollapsibleState;
+}
+
+export interface ITreeViewDataProvider {
+
+	onDidChange: Event<ITreeItem[] | undefined | null>;
+
+	onDispose: Event<void>;
+
+	getElements(): TPromise<ITreeItem[]>;
+
+	getChildren(element: ITreeItem): TPromise<ITreeItem[]>;
+
+}