| // Copyright 2017 The Fuchsia 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 PERIDOT_LIB_COMMON_STORY_PROVIDER_WATCHER_BASE_H_ |
| #define PERIDOT_LIB_COMMON_STORY_PROVIDER_WATCHER_BASE_H_ |
| |
| #include <fuchsia/modular/cpp/fidl.h> |
| #include <lib/fidl/cpp/binding.h> |
| #include <lib/fxl/macros.h> |
| |
| namespace modular { |
| |
| // A simple story provider watcher implementation that calls the Continue() |
| // callback whenever OnChange() is received. This default implementation ignores |
| // OnDelete(), but you can override this class to handle OnDelete(). |
| class StoryProviderWatcherBase : fuchsia::modular::StoryProviderWatcher { |
| public: |
| StoryProviderWatcherBase(); |
| ~StoryProviderWatcherBase() override; |
| |
| // Sets the callback that will be called whenever OnChange is received. |
| // Derived classes can change this behavior by overriding OnChange() and |
| // making the callback based on the desired criteria. |
| void Continue(std::function<void()> at); |
| |
| // Registers itself a watcher on the given story provider. Only one story |
| // provider can be watched at a time. |
| void Watch(fuchsia::modular::StoryProvider* story_provider); |
| |
| // Deregisters itself from the watched story provider. |
| void Reset(); |
| |
| protected: |
| std::function<void()> continue_; |
| |
| private: |
| // |fuchsia::modular::StoryProviderWatcher| |
| void OnDelete(::std::string story_id) override; |
| |
| // |fuchsia::modular::StoryProviderWatcher| |
| void OnChange( |
| fuchsia::modular::StoryInfo story_info, |
| fuchsia::modular::StoryState story_state, |
| fuchsia::modular::StoryVisibilityState story_visibility_state) override; |
| |
| fidl::Binding<fuchsia::modular::StoryProviderWatcher> binding_; |
| FXL_DISALLOW_COPY_AND_ASSIGN(StoryProviderWatcherBase); |
| }; |
| |
| } // namespace modular |
| |
| #endif // PERIDOT_LIB_COMMON_STORY_PROVIDER_WATCHER_BASE_H_ |