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:
   *
   *     * Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *     * 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.
   *     * Neither the name of Google Inc. nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "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 THE COPYRIGHT
   * OWNER 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_CORE_TIMING_PERFORMANCE_TIMING_H_
  #define THIRD_PARTY_BLINK_RENDERER_CORE_TIMING_PERFORMANCE_TIMING_H_
  
  #include "third_party/blink/renderer/core/core_export.h"
  #include "third_party/blink/renderer/core/dom/context_lifecycle_observer.h"
  #include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
  #include "third_party/blink/renderer/platform/heap/handle.h"
  #include "third_party/blink/renderer/platform/wtf/time.h"
  
  namespace blink {
  
  class CSSTiming;
  class DocumentLoadTiming;
  class DocumentLoader;
  class DocumentParserTiming;
  class DocumentTiming;
  class InteractiveDetector;
  class LocalFrame;
  class PaintTiming;
  class ResourceLoadTiming;
  class ScriptState;
  class ScriptValue;
  
  // Legacy support for NT1(https://www.w3.org/TR/navigation-timing/).
  class CORE_EXPORT PerformanceTiming final : public ScriptWrappable,
                                              public DOMWindowClient {
    DEFINE_WRAPPERTYPEINFO();
    USING_GARBAGE_COLLECTED_MIXIN(PerformanceTiming);
  
   public:
    static PerformanceTiming* Create(LocalFrame* frame) {
      return new PerformanceTiming(frame);
    }
  
    unsigned long long navigationStart() const;
    unsigned long long unloadEventStart() const;
    unsigned long long unloadEventEnd() const;
    unsigned long long redirectStart() const;
    unsigned long long redirectEnd() const;
    unsigned long long fetchStart() const;
    unsigned long long domainLookupStart() const;
    unsigned long long domainLookupEnd() const;
    unsigned long long connectStart() const;
    unsigned long long connectEnd() const;
    unsigned long long secureConnectionStart() const;
    unsigned long long requestStart() const;
    unsigned long long responseStart() const;
    unsigned long long responseEnd() const;
    unsigned long long domLoading() const;
    unsigned long long domInteractive() const;
    unsigned long long domContentLoadedEventStart() const;
    unsigned long long domContentLoadedEventEnd() const;
    unsigned long long domComplete() const;
    unsigned long long loadEventStart() const;
    unsigned long long loadEventEnd() const;
  
    // The below are non-spec timings, for Page Load UMA metrics.
  
    // The time the first document layout is performed.
    unsigned long long FirstLayout() const;
    // The time the first paint operation was performed.
    unsigned long long FirstPaint() const;
    // The time the first paint operation for visible text was performed.
    unsigned long long FirstTextPaint() const;
    // The time the first paint operation for image was performed.
    unsigned long long FirstImagePaint() const;
    // The time of the first 'contentful' paint. A contentful paint is a paint
    // that includes content of some kind (for example, text or image content).
    unsigned long long FirstContentfulPaint() const;
    // The time of the first 'meaningful' paint, A meaningful paint is a paint
    // where the page's primary content is visible.
    unsigned long long FirstMeaningfulPaint() const;
    // The first time the page is considered 'interactive'. This is determined
    // using heuristics based on main thread and network activity.
    unsigned long long PageInteractive() const;
    // The time of when we detect the page is interactive. There is a delay
    // between when the page was interactive and when we were able to detect it.
    unsigned long long PageInteractiveDetection() const;
    // The time of when a significant input event happened that may cause
    // observers to discard the value of Time to Interactive.
    unsigned long long FirstInputInvalidatingInteractive() const;
    // The duration between the hardware timestamp and being queued on the main
    // thread for the first click, tap, key press, cancellable touchstart, or
    // pointer down followed by a pointer up.
    unsigned long long FirstInputDelay() const;
    // The timestamp of the event whose delay is reported by FirstInputDelay().
    unsigned long long FirstInputTimestamp() const;
  
    unsigned long long ParseStart() const;
    unsigned long long ParseStop() const;
    unsigned long long ParseBlockedOnScriptLoadDuration() const;
    unsigned long long ParseBlockedOnScriptLoadFromDocumentWriteDuration() const;
    unsigned long long ParseBlockedOnScriptExecutionDuration() const;
    unsigned long long ParseBlockedOnScriptExecutionFromDocumentWriteDuration()
        const;
    unsigned long long AuthorStyleSheetParseDurationBeforeFCP() const;
    unsigned long long UpdateStyleDurationBeforeFCP() const;
  
    ScriptValue toJSONForBinding(ScriptState*) const;
  
    void Trace(blink::Visitor*) override;
  
    unsigned long long MonotonicTimeToIntegerMilliseconds(TimeTicks) const;
    TimeTicks IntegerMillisecondsToMonotonicTime(unsigned long long) const;
  
   private:
    explicit PerformanceTiming(LocalFrame*);
  
    const DocumentTiming* GetDocumentTiming() const;
    const CSSTiming* CssTiming() const;
    const DocumentParserTiming* GetDocumentParserTiming() const;
    const PaintTiming* GetPaintTiming() const;
    DocumentLoader* GetDocumentLoader() const;
    DocumentLoadTiming* GetDocumentLoadTiming() const;
    ResourceLoadTiming* GetResourceLoadTiming() const;
    InteractiveDetector* GetInteractiveDetector() const;
  };
  
  }  // namespace blink
  
  #endif  // THIRD_PARTY_BLINK_RENDERER_CORE_TIMING_PERFORMANCE_TIMING_H_
  