/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * 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.
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 * 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
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#include "third_party/blink/renderer/modules/donottrack/navigator_do_not_track.h"

#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/frame/local_frame_client.h"
#include "third_party/blink/renderer/core/frame/navigator.h"

namespace blink {

NavigatorDoNotTrack::NavigatorDoNotTrack(Navigator& navigator)
    : Supplement<Navigator>(navigator) {}

void NavigatorDoNotTrack::Trace(blink::Visitor* visitor) {
  Supplement<Navigator>::Trace(visitor);
}

const char NavigatorDoNotTrack::kSupplementName[] = "NavigatorDoNotTrack";

NavigatorDoNotTrack& NavigatorDoNotTrack::From(Navigator& navigator) {
  NavigatorDoNotTrack* supplement =
      Supplement<Navigator>::From<NavigatorDoNotTrack>(navigator);
  if (!supplement) {
    supplement = new NavigatorDoNotTrack(navigator);
    ProvideTo(navigator, supplement);
  }
  return *supplement;
}

String NavigatorDoNotTrack::doNotTrack(Navigator& navigator) {
  return NavigatorDoNotTrack::From(navigator).doNotTrack();
}

String NavigatorDoNotTrack::doNotTrack() {
  LocalFrame* frame = GetSupplementable()->GetFrame();
  if (!frame || !frame->Client())
    return String();
  return frame->Client()->DoNotTrackValue();
}

}  // namespace blink
