text: /*
   * Copyright (C) 2010 Google, Inc. All Rights Reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_FETCH_RESOURCE_LOAD_TIMING_H_
  #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_FETCH_RESOURCE_LOAD_TIMING_H_
  
  #include "base/memory/scoped_refptr.h"
  #include "base/time/time.h"
  #include "services/network/public/mojom/load_timing_info.mojom-blink-forward.h"
  #include "third_party/blink/renderer/platform/platform_export.h"
  #include "third_party/blink/renderer/platform/wtf/ref_counted.h"
  
  namespace blink {
  
  class PLATFORM_EXPORT ResourceLoadTiming
      : public RefCounted<ResourceLoadTiming> {
   public:
    static scoped_refptr<ResourceLoadTiming> Create();
  
    bool operator==(const ResourceLoadTiming&) const;
    bool operator!=(const ResourceLoadTiming&) const;
  
    static scoped_refptr<ResourceLoadTiming> FromMojo(
        const network::mojom::blink::LoadTimingInfo*);
    network::mojom::blink::LoadTimingInfoPtr ToMojo() const;
  
    void SetDnsStart(base::TimeTicks);
    void SetRequestTime(base::TimeTicks);
    void SetProxyStart(base::TimeTicks);
    void SetProxyEnd(base::TimeTicks);
    void SetDnsEnd(base::TimeTicks);
    void SetConnectStart(base::TimeTicks);
    void SetConnectEnd(base::TimeTicks);
    void SetWorkerStart(base::TimeTicks);
    void SetWorkerReady(base::TimeTicks);
    void SetWorkerFetchStart(base::TimeTicks);
    void SetWorkerRespondWithSettled(base::TimeTicks);
    void SetSendStart(base::TimeTicks);
    void SetSendEnd(base::TimeTicks);
    void SetReceiveHeadersStart(base::TimeTicks);
    void SetReceiveHeadersEnd(base::TimeTicks);
    void SetSslStart(base::TimeTicks);
    void SetSslEnd(base::TimeTicks);
    void SetPushStart(base::TimeTicks);
    void SetPushEnd(base::TimeTicks);
  
    base::TimeTicks DnsStart() const { return dns_start_; }
    base::TimeTicks RequestTime() const { return request_time_; }
    base::TimeTicks ProxyStart() const { return proxy_start_; }
    base::TimeTicks ProxyEnd() const { return proxy_end_; }
    base::TimeTicks DnsEnd() const { return dns_end_; }
    base::TimeTicks ConnectStart() const { return connect_start_; }
    base::TimeTicks ConnectEnd() const { return connect_end_; }
    base::TimeTicks WorkerStart() const { return worker_start_; }
    base::TimeTicks WorkerReady() const { return worker_ready_; }
    base::TimeTicks WorkerFetchStart() const { return worker_fetch_start_; }
    base::TimeTicks WorkerRespondWithSettled() const {
      return worker_respond_with_settled_;
    }
    base::TimeTicks SendStart() const { return send_start_; }
    base::TimeTicks SendEnd() const { return send_end_; }
    base::TimeTicks ReceiveHeadersStart() const { return receive_headers_start_; }
    base::TimeTicks ReceiveHeadersEnd() const { return receive_headers_end_; }
    base::TimeTicks SslStart() const { return ssl_start_; }
    base::TimeTicks SslEnd() const { return ssl_end_; }
    base::TimeTicks PushStart() const { return push_start_; }
    base::TimeTicks PushEnd() const { return push_end_; }
  
    double CalculateMillisecondDelta(base::TimeTicks) const;
  
   private:
    ResourceLoadTiming();
    ResourceLoadTiming(base::TimeTicks request_time,
                       base::TimeTicks proxy_start,
                       base::TimeTicks proxy_end,
                       base::TimeTicks dns_start,
                       base::TimeTicks dns_end,
                       base::TimeTicks connect_start,
                       base::TimeTicks connect_end,
                       base::TimeTicks worker_start,
                       base::TimeTicks worker_ready,
                       base::TimeTicks worker_fetch_start,
                       base::TimeTicks worker_respond_with_settled,
                       base::TimeTicks send_start,
                       base::TimeTicks send_end,
                       base::TimeTicks receive_headers_start,
                       base::TimeTicks receive_headers_end,
                       base::TimeTicks ssl_start,
                       base::TimeTicks ssl_end,
                       base::TimeTicks push_start,
                       base::TimeTicks push_end);
  
    // We want to present a unified timeline to Javascript. Using walltime is
    // problematic, because the clock may skew while resources load. To prevent
    // that skew, we record a single reference walltime when root document
    // navigation begins. All other times are recorded using
    // monotonicallyIncreasingTime(). When a time needs to be presented to
    // Javascript, we build a pseudo-walltime using the following equation
    // (m_requestTime as example):
    //   pseudo time = document wall reference +
    //                     (m_requestTime - document monotonic reference).
  
    // All values from monotonicallyIncreasingTime(), in base::TimeTicks.
    base::TimeTicks request_time_;
    base::TimeTicks proxy_start_;
    base::TimeTicks proxy_end_;
    base::TimeTicks dns_start_;
    base::TimeTicks dns_end_;
    base::TimeTicks connect_start_;
    base::TimeTicks connect_end_;
    base::TimeTicks worker_start_;
    base::TimeTicks worker_ready_;
    base::TimeTicks worker_fetch_start_;
    base::TimeTicks worker_respond_with_settled_;
    base::TimeTicks send_start_;
    base::TimeTicks send_end_;
    base::TimeTicks receive_headers_start_;
    base::TimeTicks receive_headers_end_;
    base::TimeTicks ssl_start_;
    base::TimeTicks ssl_end_;
    base::TimeTicks push_start_;
    base::TimeTicks push_end_;
  };
  
  }  // namespace blink
  
  #endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_FETCH_RESOURCE_LOAD_TIMING_H_
  