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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "modules/donottrack/NavigatorDoNotTrack.h"
     33 
     34 #include "core/frame/LocalFrame.h"
     35 #include "core/frame/Navigator.h"
     36 #include "core/loader/FrameLoaderClient.h"
     37 
     38 namespace blink {
     39 
     40 NavigatorDoNotTrack::NavigatorDoNotTrack(LocalFrame* frame)
     41     : DOMWindowProperty(frame)
     42 {
     43 }
     44 
     45 DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(NavigatorDoNotTrack);
     46 
     47 void NavigatorDoNotTrack::trace(Visitor* visitor)
     48 {
     49     WillBeHeapSupplement<Navigator>::trace(visitor);
     50     DOMWindowProperty::trace(visitor);
     51 }
     52 
     53 const char* NavigatorDoNotTrack::supplementName()
     54 {
     55     return "NavigatorDoNotTrack";
     56 }
     57 
     58 NavigatorDoNotTrack& NavigatorDoNotTrack::from(Navigator& navigator)
     59 {
     60     NavigatorDoNotTrack* supplement = static_cast<NavigatorDoNotTrack*>(WillBeHeapSupplement<Navigator>::from(navigator, supplementName()));
     61     if (!supplement) {
     62         supplement = new NavigatorDoNotTrack(navigator.frame());
     63         provideTo(navigator, supplementName(), adoptPtrWillBeNoop(supplement));
     64     }
     65     return *supplement;
     66 }
     67 
     68 String NavigatorDoNotTrack::doNotTrack(Navigator& navigator)
     69 {
     70     return NavigatorDoNotTrack::from(navigator).doNotTrack();
     71 }
     72 
     73 String NavigatorDoNotTrack::doNotTrack()
     74 {
     75     if (!frame() || !frame()->loader().client())
     76         return String();
     77     return frame()->loader().client()->doNotTrackValue();
     78 }
     79 
     80 } // namespace blink
     81