| // Copyright 2015 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_CHILD_PERMISSIONS_PERMISSION_DISPATCHER_H_ |
| #define CONTENT_CHILD_PERMISSIONS_PERMISSION_DISPATCHER_H_ |
| |
| #include <string> |
| |
| #include "base/callback_forward.h" |
| #include "base/id_map.h" |
| #include "base/macros.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "content/child/permissions/permission_observers_registry.h" |
| #include "content/common/permission_service.mojom.h" |
| #include "third_party/WebKit/public/platform/modules/permissions/WebPermissionClient.h" |
| |
| namespace content { |
| |
| class ServiceRegistry; |
| |
| // The PermissionDispatcher is a layer between Blink and the Mojo |
| // PermissionService. It implements blink::WebPermissionClient. It is being used |
| // from workers and frames independently. When called outside of the main |
| // thread, QueryPermissionForWorker is meant to be called. It will handle the |
| // thread jumping. |
| class PermissionDispatcher : public blink::WebPermissionClient, |
| public PermissionObserversRegistry { |
| public: |
| // Returns whether the given WebPermissionType is observable. Some types have |
| // static values that never changes. |
| static bool IsObservable(blink::WebPermissionType type); |
| |
| // The caller must guarantee that |service_registry| will have a lifetime |
| // larger than this instance of PermissionDispatcher. |
| explicit PermissionDispatcher(ServiceRegistry* service_registry); |
| virtual ~PermissionDispatcher(); |
| |
| // blink::WebPermissionClient implementation. |
| virtual void queryPermission(blink::WebPermissionType type, |
| const blink::WebURL& origin, |
| blink::WebPermissionQueryCallback* callback); |
| virtual void startListening(blink::WebPermissionType type, |
| const blink::WebURL& origin, |
| blink::WebPermissionObserver* observer); |
| virtual void stopListening(blink::WebPermissionObserver* observer); |
| |
| // The following methods must be called by workers on the main thread. |
| void QueryPermissionForWorker(blink::WebPermissionType type, |
| const std::string& origin, |
| blink::WebPermissionQueryCallback* callback, |
| int worker_thread_id); |
| void StartListeningForWorker( |
| blink::WebPermissionType type, |
| const std::string& origin, |
| int worker_thread_id, |
| const base::Callback<void(blink::WebPermissionStatus)>& callback); |
| void GetNextPermissionChangeForWorker( |
| blink::WebPermissionType type, |
| const std::string& origin, |
| blink::WebPermissionStatus status, |
| int worker_thread_id, |
| const base::Callback<void(blink::WebPermissionStatus)>& callback); |
| |
| private: |
| // Runs the given |callback| with |status| as a parameter. It has to be run |
| // on a worker thread. |
| static void RunCallbackOnWorkerThread( |
| blink::WebPermissionQueryCallback* callback, |
| scoped_ptr<blink::WebPermissionStatus> status); |
| |
| // Helper method that returns an initialized PermissionServicePtr. |
| PermissionServicePtr& GetPermissionServicePtr(); |
| |
| void QueryPermissionInternal(blink::WebPermissionType type, |
| const std::string& origin, |
| blink::WebPermissionQueryCallback* callback, |
| int worker_thread_id); |
| |
| void OnQueryPermission(int request_id, PermissionStatus status); |
| void OnPermissionChanged(blink::WebPermissionType type, |
| const std::string& origin, |
| blink::WebPermissionObserver* observer, |
| PermissionStatus status); |
| void OnPermissionChangedForWorker( |
| int worker_thread_id, |
| const base::Callback<void(blink::WebPermissionStatus)>& callback, |
| PermissionStatus status); |
| |
| void GetNextPermissionChange(blink::WebPermissionType type, |
| const std::string& origin, |
| blink::WebPermissionObserver* observer, |
| PermissionStatus current_status); |
| |
| // Saves some basic information about the callback in order to be able to run |
| // it in the right thread. |
| class CallbackInformation { |
| public: |
| CallbackInformation(blink::WebPermissionQueryCallback* callback, |
| int worker_thread_id); |
| ~CallbackInformation(); |
| |
| blink::WebPermissionQueryCallback* callback() const; |
| int worker_thread_id() const; |
| |
| blink::WebPermissionQueryCallback* ReleaseCallback(); |
| |
| private: |
| scoped_ptr<blink::WebPermissionQueryCallback> callback_; |
| int worker_thread_id_; |
| |
| DISALLOW_COPY_AND_ASSIGN(CallbackInformation); |
| }; |
| using CallbackMap = IDMap<CallbackInformation, IDMapOwnPointer>; |
| CallbackMap pending_callbacks_; |
| |
| ServiceRegistry* service_registry_; |
| PermissionServicePtr permission_service_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PermissionDispatcher); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_CHILD_PERMISSIONS_PERMISSION_DISPATCHER_H_ |