gecko-dev/widget/ScreenManager.h

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_widget_ScreenManager_h
#define mozilla_widget_ScreenManager_h

#include "nsIScreenManager.h"

#include "mozilla/RefPtr.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/widget/Screen.h"
#include "nsTArray.h"

namespace mozilla {
namespace dom {
class ContentParent;
class ScreenDetails;
}  // namespace dom
}  // namespace mozilla

namespace mozilla::widget {

class ScreenManager final : public nsIScreenManager {
 public:
  class Helper {
   public:
    virtual ~Helper() = default;
  };

 public:
  NS_DECL_ISUPPORTS
  NS_DECL_NSISCREENMANAGER

  static ScreenManager& GetSingleton();
  static already_AddRefed<ScreenManager> GetAddRefedSingleton();

  void SetHelper(UniquePtr<Helper> aHelper);
  static void Refresh(nsTArray<RefPtr<Screen>>&& aScreens);
  void Refresh(nsTArray<mozilla::dom::ScreenDetails>&& aScreens);
  void CopyScreensToRemote(mozilla::dom::ContentParent* aContentParent);
  already_AddRefed<Screen> GetPrimaryScreen();
  already_AddRefed<Screen> ScreenForRect(const DesktopIntRect& aRect);

  const nsTArray<RefPtr<Screen>>& CurrentScreenList() const {
    return mScreenList;
  }

 private:
  ScreenManager();
  virtual ~ScreenManager();

  void RefreshInternal(nsTArray<RefPtr<Screen>>&& aScreens);
  template <class Range>
  void CopyScreensToRemoteRange(Range aRemoteRange);
  void CopyScreensToAllRemotesIfIsParent();

  AutoTArray<RefPtr<Screen>, 4> mScreenList;
  UniquePtr<Helper> mHelper;
};

}  // namespace mozilla::widget

#endif  // mozilla_widget_ScreenManager_h