// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

module mash.shelf.mojom;

import "mash/shelf/public/interfaces/shelf_constants.mojom";
import "skia/public/interfaces/bitmap.mojom";

// TODO(msw): Add support for multiple displays (with unified and multi-shelf).

// The Shelf controller allows clients (eg. Chrome) to control the mash shelf.
interface ShelfController {
  AddObserver(associated ShelfObserver observer);

  SetAlignment(Alignment alignment);
  SetAutoHideBehavior(AutoHideBehavior auto_hide);

  PinItem(ShelfItem item, associated ShelfItemDelegate delegate);
  UnpinItem(string app_id);

  SetItemImage(string app_id, skia.mojom.Bitmap image);
};

// ShelfObserver is notified on shelf changes; used to persist profile settings.
interface ShelfObserver {
  OnAlignmentChanged(Alignment alignment);
  OnAutoHideBehaviorChanged(AutoHideBehavior auto_hide);
};

// ShelfItemDelegate handles command execution and observes shelf item changes.
interface ShelfItemDelegate {
  // Called when a pinned shelf item is invoked without an open window.
  LaunchItem();

  // Called on invocation of a shelf item's context menu command.
  ExecuteCommand(uint32 command_id, int32 event_flags);

  // Called when a shelf item is pinned or unpinned.
  ItemPinned();
  ItemUnpinned();

  // Called when a pinned shelf item is reordered.
  // |order| is the index of the item on the shelf.
  ItemReordered(uint32 order);
};

// ContextMenuItems may be used to supplement ash shelf item context menus.
struct ContextMenuItem {
  enum Type { ITEM, CHECK, RADIO, SEPARATOR, SUBMENU };

  Type type;
  uint32 command_id;
  string? label;
  array<ContextMenuItem>? submenu;
  bool enabled;
  bool checked;
  uint32 radio_group_id;
};

// ShelfItem contains the basic fields needed to pin shortcut items.
struct ShelfItem {
  // An app id, used to correlate windows and shortcuts (eg. 'mojo:foo').
  string app_id;

  // A app title, used for tooltips, etc. (eg. 'Foo Application').
  string app_title;

  // An icon image Bitmap, shown on the shelf.
  skia.mojom.Bitmap image;

  // Additional context menu items (eg. 'New Incognito Window').
  array<ContextMenuItem>? context_menu_items;
};