xref: /external/chromium_org/third_party/WebKit/Source/modules/donottrack/NavigatorDoNotTrack.cpp

/*
 * Copyright (C) 2013 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.
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
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 * 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,
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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#include "config.h"
#include "modules/donottrack/NavigatorDoNotTrack.h"

#include "core/frame/LocalFrame.h"
#include "core/frame/Navigator.h"
#include "core/loader/FrameLoaderClient.h"

namespace blink {

NavigatorDoNotTrack::NavigatorDoNotTrack(LocalFrame* frame)
    : DOMWindowProperty(frame)
{
}

DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(NavigatorDoNotTrack);

void NavigatorDoNotTrack::trace(Visitor* visitor)
{
    WillBeHeapSupplement<Navigator>::trace(visitor);
    DOMWindowProperty::trace(visitor);
}

const char* NavigatorDoNotTrack::supplementName()
{
    return "NavigatorDoNotTrack";
}

NavigatorDoNotTrack& NavigatorDoNotTrack::from(Navigator& navigator)
{
    NavigatorDoNotTrack* supplement = static_cast<NavigatorDoNotTrack*>(WillBeHeapSupplement<Navigator>::from(navigator, supplementName()));
    if (!supplement) {
        supplement = new NavigatorDoNotTrack(navigator.frame());
        provideTo(navigator, supplementName(), adoptPtrWillBeNoop(supplement));
    }
    return *supplement;
}

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

String NavigatorDoNotTrack::doNotTrack()
{
    if (!frame() || !frame()->loader().client())
        return String();
    return frame()->loader().client()->doNotTrackValue();
}

} // namespace blink