content/browser/frame_host/popup_menu_helper_mac.h

// Copyright (c) 2012 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.

#ifndef CONTENT_BROWSER_FRAME_HOST_POPUP_MENU_HELPER_MAC_H_
#define CONTENT_BROWSER_FRAME_HOST_POPUP_MENU_HELPER_MAC_H_

#include <memory>
#include <vector>

#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/scoped_observer.h"
#include "content/common/content_export.h"
#include "content/public/browser/render_widget_host_observer.h"
#include "ui/gfx/geometry/rect.h"

#ifdef __OBJC__
@class WebMenuRunner;
#else
class WebMenuRunner;
#endif

namespace base {
class ScopedPumpMessagesInPrivateModes;
}

namespace content {

class RenderFrameHost;
class RenderFrameHostImpl;
class RenderWidgetHostViewMac;
struct MenuItem;

class PopupMenuHelper : public RenderWidgetHostObserver {
 public:
  class Delegate {
   public:
    virtual void OnMenuClosed() = 0;
  };

  // Creates a PopupMenuHelper that will notify |render_frame_host| when a user
  // selects or cancels the popup. |delegate| is notified when the menu is
  // closed.
  PopupMenuHelper(Delegate* delegate, RenderFrameHost* render_frame_host);
  ~PopupMenuHelper() override;
  void Hide();

  // Shows the popup menu and notifies the RenderFrameHost of the selection/
  // cancellation. This call is blocking.
  void ShowPopupMenu(const gfx::Rect& bounds,
                     int item_height,
                     double item_font_size,
                     int selected_item,
                     const std::vector<MenuItem>& items,
                     bool right_aligned,
                     bool allow_multiple_selection);

  // Immediately return from ShowPopupMenu.
  CONTENT_EXPORT static void DontShowPopupMenuForTesting();

 protected:
  virtual RenderWidgetHostViewMac* GetRenderWidgetHostView() const;

 private:
  // RenderWidgetHostObserver implementation:
  void RenderWidgetHostVisibilityChanged(RenderWidgetHost* widget_host,
                                         bool became_visible) override;
  void RenderWidgetHostDestroyed(RenderWidgetHost* widget_host) override;

  Delegate* delegate_;  // Weak. Owns |this|.

  ScopedObserver<RenderWidgetHost, RenderWidgetHostObserver> observer_;
  RenderFrameHostImpl* render_frame_host_;
  WebMenuRunner* menu_runner_;
  bool popup_was_hidden_;

  // Controls whether messages can be pumped during the menu fade.
  std::unique_ptr<base::ScopedPumpMessagesInPrivateModes> pump_in_fade_;

  base::WeakPtrFactory<PopupMenuHelper> weak_ptr_factory_;

  DISALLOW_COPY_AND_ASSIGN(PopupMenuHelper);
};

}  // namespace content

#endif  // CONTENT_BROWSER_FRAME_HOST_POPUP_MENU_HELPER_MAC_H_