third_party/WebKit/Source/core/timing/PerformanceNavigation.cpp

/*
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#include "core/timing/PerformanceNavigation.h"

#include "bindings/core/v8/ScriptValue.h"
#include "bindings/core/v8/V8ObjectBuilder.h"
#include "core/frame/LocalFrame.h"
#include "core/loader/DocumentLoader.h"
#include "core/loader/FrameLoaderTypes.h"

// Legacy support for NT1(https://www.w3.org/TR/navigation-timing/).
namespace blink {

PerformanceNavigation::PerformanceNavigation(LocalFrame* frame)
    : DOMWindowClient(frame) {}

unsigned short PerformanceNavigation::type() const {
  if (!GetFrame())
    return kTypeNavigate;

  DocumentLoader* document_loader = GetFrame()->Loader().GetDocumentLoader();
  if (!document_loader)
    return kTypeNavigate;

  switch (document_loader->GetNavigationType()) {
    case kNavigationTypeReload:
      return kTypeReload;
    case kNavigationTypeBackForward:
      return kTypeBackForward;
    default:
      return kTypeNavigate;
  }
}

unsigned short PerformanceNavigation::redirectCount() const {
  if (!GetFrame())
    return 0;

  DocumentLoader* loader = GetFrame()->Loader().GetDocumentLoader();
  if (!loader)
    return 0;

  const DocumentLoadTiming& timing = loader->GetTiming();
  if (timing.HasCrossOriginRedirect())
    return 0;

  return timing.RedirectCount();
}

ScriptValue PerformanceNavigation::toJSONForBinding(
    ScriptState* script_state) const {
  V8ObjectBuilder result(script_state);
  result.AddNumber("type", type());
  result.AddNumber("redirectCount", redirectCount());
  return result.GetScriptValue();
}

void PerformanceNavigation::Trace(blink::Visitor* visitor) {
  ScriptWrappable::Trace(visitor);
  DOMWindowClient::Trace(visitor);
}

}  // namespace blink