| // Copyright 2015 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 SRC_UI_BIN_ROOT_PRESENTER_APP_H_ |
| #define SRC_UI_BIN_ROOT_PRESENTER_APP_H_ |
| |
| #include <fuchsia/accessibility/cpp/fidl.h> |
| #include <fuchsia/ui/input/accessibility/cpp/fidl.h> |
| #include <fuchsia/ui/input/cpp/fidl.h> |
| #include <fuchsia/ui/policy/accessibility/cpp/fidl.h> |
| #include <fuchsia/ui/policy/cpp/fidl.h> |
| #include <fuchsia/ui/scenic/cpp/fidl.h> |
| #include <fuchsia/ui/views/accessibility/cpp/fidl.h> |
| #include <fuchsia/ui/views/cpp/fidl.h> |
| #include <lib/async-loop/cpp/loop.h> |
| #include <lib/fidl/cpp/binding_set.h> |
| #include <lib/inspect/cpp/inspector.h> |
| #include <lib/sys/cpp/component_context.h> |
| #include <lib/sys/inspect/cpp/component.h> |
| #include <lib/ui/scenic/cpp/resources.h> |
| |
| #include <limits> |
| #include <memory> |
| #include <unordered_map> |
| #include <vector> |
| |
| #include "src/lib/fxl/macros.h" |
| #include "src/lib/ui/input/input_device_impl.h" |
| #include "src/ui/bin/root_presenter/color_transform_handler.h" |
| #include "src/ui/bin/root_presenter/constants.h" |
| #include "src/ui/bin/root_presenter/factory_reset_manager.h" |
| #include "src/ui/bin/root_presenter/inspect.h" |
| #include "src/ui/bin/root_presenter/media_buttons_handler.h" |
| #include "src/ui/bin/root_presenter/presentation.h" |
| #include "src/ui/bin/root_presenter/safe_presenter.h" |
| #include "src/ui/lib/input_report_reader/input_reader.h" |
| |
| namespace root_presenter { |
| |
| // The presenter provides a |fuchsia::ui::policy::Presenter| service which |
| // displays UI by attaching the provided view to the root of a new view tree |
| // associated with a new renderer. |
| // |
| // Any number of view trees can be created, although multi-display support |
| // and input routing is not fully supported (TODO). |
| class App : public fuchsia::ui::policy::Presenter, |
| public fuchsia::ui::policy::DeviceListenerRegistry, |
| public fuchsia::ui::input::InputDeviceRegistry, |
| public fuchsia::ui::input::accessibility::PointerEventRegistry, |
| public fuchsia::ui::views::accessibility::FocuserRegistry, |
| public fuchsia::ui::views::Focuser, |
| public ui_input::InputDeviceImpl::Listener { |
| public: |
| App(sys::ComponentContext* component_context, async_dispatcher_t* dispatcher); |
| ~App() = default; |
| |
| // |InputDeviceImpl::Listener| |
| void OnDeviceDisconnected(ui_input::InputDeviceImpl* input_device) override; |
| void OnReport(ui_input::InputDeviceImpl* input_device, |
| fuchsia::ui::input::InputReport report) override; |
| |
| // |fuchsia.ui.input.accessibility.PointerEventRegistry| |
| void Register(fidl::InterfaceHandle<fuchsia::ui::input::accessibility::PointerEventListener> |
| pointer_event_listener) override; |
| |
| // |fuchsia.ui.views.accessibility.FocuserRegistry| |
| void RegisterFocuser(fidl::InterfaceRequest<fuchsia::ui::views::Focuser> view_focuser) override; |
| |
| // |Presenter| |
| void PresentView( |
| fuchsia::ui::views::ViewHolderToken view_holder_token, |
| fidl::InterfaceRequest<fuchsia::ui::policy::Presentation> presentation_request) override; |
| |
| // |Presenter| |
| void PresentOrReplaceView( |
| fuchsia::ui::views::ViewHolderToken view_holder_token, |
| fidl::InterfaceRequest<fuchsia::ui::policy::Presentation> presentation_request) override; |
| |
| // For testing. |
| bool is_presentation_initialized() const { |
| return presentation_ && presentation_->is_initialized(); |
| } |
| |
| // For testing. |
| const inspect::Inspector* inspector() { return inspector_.inspector(); } |
| |
| private: |
| // |DeviceListenerRegistry| |
| void RegisterMediaButtonsListener( |
| fidl::InterfaceHandle<fuchsia::ui::policy::MediaButtonsListener> listener) override; |
| |
| // |InputDeviceRegistry| |
| void RegisterDevice( |
| fuchsia::ui::input::DeviceDescriptor descriptor, |
| fidl::InterfaceRequest<fuchsia::ui::input::InputDevice> input_device_request) override; |
| |
| void InitializeServices(); |
| void Reset(); |
| |
| void SetPresentation(std::unique_ptr<Presentation> presentation); |
| void ShutdownPresentation(); |
| |
| // |fuchsia.ui.views.Focuser| |
| void RequestFocus(fuchsia::ui::views::ViewRef view_ref, RequestFocusCallback callback) override; |
| |
| sys::ComponentContext* const component_context_; |
| sys::ComponentInspector inspector_; |
| InputReportInspector input_report_inspector_; |
| fidl::BindingSet<fuchsia::ui::policy::Presenter> presenter_bindings_; |
| fidl::BindingSet<fuchsia::ui::policy::DeviceListenerRegistry> device_listener_bindings_; |
| fidl::BindingSet<fuchsia::ui::input::InputDeviceRegistry> input_receiver_bindings_; |
| fidl::BindingSet<fuchsia::ui::input::accessibility::PointerEventRegistry> |
| a11y_pointer_event_bindings_; |
| fidl::BindingSet<fuchsia::ui::views::accessibility::FocuserRegistry> |
| a11y_focuser_registry_bindings_; |
| ui_input::InputReader input_reader_; |
| std::unique_ptr<FactoryResetManager> fdr_manager_; |
| |
| fuchsia::ui::scenic::ScenicPtr scenic_; |
| std::unique_ptr<scenic::Session> session_; |
| |
| // This is a privileged interface between Root Presenter and Scenic. It forwards the requests |
| // incoming from accessibility services to start listening for pointer events. |
| fuchsia::ui::policy::accessibility::PointerEventRegistryPtr pointer_event_registry_; |
| // This is a privileged interface between Root Presenter and Scenic. It forwards the Focuser |
| // requests incoming from accessibility services to Scenic. This Focuser is implicitly associated |
| // with the root view, which gives it access to change the Focus Chain to whatever view that is |
| // part of the hierarchy. |
| fuchsia::ui::views::FocuserPtr view_focuser_; |
| // Binding holding the connection between a11y and Root Presenter. The incoming Focuser calls are |
| // simply forwarded using |view_focuser_|. |
| fidl::Binding<fuchsia::ui::views::Focuser> focuser_binding_; |
| // If accessibility requests to register a Focuser and Scenic hasn't started yet, the binding of |
| // |focuser_binding_| is deferred until |view_focuser_| is initialized. |
| fit::function<void()> deferred_a11y_focuser_binding_; |
| |
| // If accessibility requests to register a PointerEventRegistry and Scenic hasn't started yet, the |
| // registration is deferred until GetDisplayOwnershipEventCallback is called. |
| fit::function<void()> deferred_a11y_pointer_event_registry_ = nullptr; |
| |
| // This is a privileged interface between Root Presenter and Accessibility. It allows Root |
| // Presenter to register presentations with Accessibility for magnification. |
| fuchsia::accessibility::MagnifierPtr magnifier_; |
| |
| // Today, we have a global, singleton compositor, and it is managed solely by |
| // a root presenter. Hence, a single resource ID is sufficient to identify it. |
| // Additionally, it is a system invariant that any compositor is created and |
| // managed by a root presenter. We may relax these constraints in the |
| // following order: |
| // * Root presenter creates multiple compositors. Here, a resource ID for each |
| // compositor would still be sufficient to uniquely identify it. |
| // * Root presenter delegates the creation of compositors. Here, we would |
| // need to generalize the identifier to include the delegate's session ID. |
| std::unique_ptr<scenic::DisplayCompositor> compositor_; |
| std::unique_ptr<scenic::LayerStack> layer_stack_; |
| |
| std::unique_ptr<Presentation> presentation_; |
| |
| std::unique_ptr<SafePresenter> safe_presenter_; |
| |
| uint32_t next_device_token_ = 0; |
| std::unordered_map<uint32_t, std::unique_ptr<ui_input::InputDeviceImpl>> devices_by_id_; |
| |
| // The media button handler manages processing input from devices with media |
| // buttons and propagating them to listeners. |
| // |
| // This processing is done at the global level through root presenter but |
| // also supports registering listeners at the presentation level for legacy |
| // support. |
| MediaButtonsHandler media_buttons_handler_; |
| |
| // Tracks if scenic initialization is complete. |
| bool is_scenic_initialized_ = false; |
| std::unique_ptr<ColorTransformHandler> color_transform_handler_; |
| |
| FXL_DISALLOW_COPY_AND_ASSIGN(App); |
| }; |
| |
| } // namespace root_presenter |
| |
| #endif // SRC_UI_BIN_ROOT_PRESENTER_APP_H_ |