browser_tabs_model_provider.h 1.8 KB

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  1. // Copyright 2020 The Chromium Authors. All rights reserved.
  2. // Use of this source code is governed by a BSD-style license that can be
  3. // found in the LICENSE file.
  4. #ifndef ASH_COMPONENTS_PHONEHUB_BROWSER_TABS_MODEL_PROVIDER_H_
  5. #define ASH_COMPONENTS_PHONEHUB_BROWSER_TABS_MODEL_PROVIDER_H_
  6. #include <ostream>
  7. #include "ash/components/phonehub/browser_tabs_model.h"
  8. #include "base/observer_list.h"
  9. #include "base/observer_list_types.h"
  10. namespace ash {
  11. namespace phonehub {
  12. // Responsible for providing BrowserTabsModel information to observers.
  13. class BrowserTabsModelProvider {
  14. public:
  15. class Observer : public base::CheckedObserver {
  16. public:
  17. ~Observer() override = default;
  18. virtual void OnBrowserTabsUpdated(
  19. bool is_sync_enabled,
  20. const std::vector<BrowserTabsModel::BrowserTabMetadata>&
  21. browser_tabs_metadata) = 0;
  22. };
  23. BrowserTabsModelProvider(const BrowserTabsModelProvider&) = delete;
  24. BrowserTabsModelProvider* operator=(const BrowserTabsModelProvider&) = delete;
  25. virtual ~BrowserTabsModelProvider();
  26. void AddObserver(Observer* observer);
  27. void RemoveObserver(Observer* observer);
  28. // Used to manually request updates for the latest browser tab metadata,
  29. // instead of lazily waiting for an update to occur on its own. This may be
  30. // advantageous when the user opens the PhoneHub tray immediately after
  31. // visiting a link on the connected phone's Chrome Browser.
  32. virtual void TriggerRefresh() = 0;
  33. protected:
  34. BrowserTabsModelProvider();
  35. void NotifyBrowserTabsUpdated(
  36. bool is_sync_enabled,
  37. const std::vector<BrowserTabsModel::BrowserTabMetadata>
  38. browser_tabs_metadata);
  39. private:
  40. base::ObserverList<Observer> observer_list_;
  41. };
  42. } // namespace phonehub
  43. } // namespace ash
  44. #endif // ASH_COMPONENTS_PHONEHUB_BROWSER_TABS_MODEL_PROVIDER_H_