third_party/WebKit/Source/core/css/CSSTiming.cpp

// Copyright 2016 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.

#include "core/css/CSSTiming.h"

#include "core/paint/PaintTiming.h"

namespace blink {

static const char kSupplementName[] = "CSSTiming";

CSSTiming& CSSTiming::From(Document& document) {
  CSSTiming* timing = static_cast<CSSTiming*>(
      Supplement<Document>::From(document, kSupplementName));
  if (!timing) {
    timing = new CSSTiming(document);
    Supplement<Document>::ProvideTo(document, kSupplementName, timing);
  }
  return *timing;
}

void CSSTiming::RecordAuthorStyleSheetParseTime(double seconds) {
  if (!paint_timing_->FirstContentfulPaint())
    parse_time_before_fcp_ += seconds;
}

void CSSTiming::RecordUpdateDuration(double seconds) {
  if (!paint_timing_->FirstContentfulPaint())
    update_time_before_fcp_ += seconds;
}

void CSSTiming::Trace(blink::Visitor* visitor) {
  visitor->Trace(paint_timing_);
  Supplement<Document>::Trace(visitor);
}

CSSTiming::CSSTiming(Document& document)
    : Supplement<Document>(document),
      paint_timing_(PaintTiming::From(document)) {}

}  // namespace blink