third_party/WebKit/Source/core/frame/ReportingContext.h

// Copyright 2017 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 ReportingContext_h
#define ReportingContext_h

#include "core/CoreExport.h"
#include "core/dom/ExecutionContext.h"
#include "platform/Supplementable.h"

namespace blink {

class ExecutionContext;
class Report;
class ReportingObserver;

// ReportingContext is used as a container for all active ReportingObservers for
// an ExecutionContext.
class CORE_EXPORT ReportingContext final
    : public GarbageCollectedFinalized<ReportingContext>,
      public Supplement<ExecutionContext> {
  USING_GARBAGE_COLLECTED_MIXIN(ReportingContext)
 public:
  explicit ReportingContext(ExecutionContext&);

  static const char* SupplementName();

  // Returns the ReportingContext for an ExecutionContext. If one does not
  // already exist for the given context, one is created.
  static ReportingContext* From(ExecutionContext*);

  // Queues a report to be reported to all observers.
  void QueueReport(Report*);

  // Sends all queued reports to all observers.
  void SendReports();

  void RegisterObserver(ReportingObserver*);
  void UnregisterObserver(ReportingObserver*);

  // Returns whether there is at least one active ReportingObserver.
  bool ObserverExists();

  DECLARE_VIRTUAL_TRACE();

 private:
  HeapListHashSet<Member<ReportingObserver>> observers_;
  HeapVector<Member<Report>> reports_;
  Member<ExecutionContext> execution_context_;
};

}  // namespace blink

#endif  // ReportingContext_h