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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "config.h"
      6 #include "modules/netinfo/NavigatorNetworkInformation.h"
      7 
      8 #include "core/frame/LocalDOMWindow.h"
      9 #include "core/frame/LocalFrame.h"
     10 #include "core/frame/Navigator.h"
     11 #include "modules/netinfo/NetworkInformation.h"
     12 
     13 namespace blink {
     14 
     15 NavigatorNetworkInformation::NavigatorNetworkInformation(Navigator& navigator)
     16     : DOMWindowProperty(navigator.frame())
     17 {
     18 }
     19 
     20 DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(NavigatorNetworkInformation);
     21 
     22 NavigatorNetworkInformation& NavigatorNetworkInformation::from(Navigator& navigator)
     23 {
     24     NavigatorNetworkInformation* supplement = toNavigatorNetworkInformation(navigator);
     25     if (!supplement) {
     26         supplement = new NavigatorNetworkInformation(navigator);
     27         provideTo(navigator, supplementName(), adoptPtrWillBeNoop(supplement));
     28     }
     29     return *supplement;
     30 }
     31 
     32 NavigatorNetworkInformation* NavigatorNetworkInformation::toNavigatorNetworkInformation(Navigator& navigator)
     33 {
     34     return static_cast<NavigatorNetworkInformation*>(WillBeHeapSupplement<Navigator>::from(navigator, supplementName()));
     35 }
     36 
     37 const char* NavigatorNetworkInformation::supplementName()
     38 {
     39     return "NavigatorNetworkInformation";
     40 }
     41 
     42 NetworkInformation* NavigatorNetworkInformation::connection(Navigator& navigator)
     43 {
     44     return NavigatorNetworkInformation::from(navigator).connection();
     45 }
     46 
     47 NetworkInformation* NavigatorNetworkInformation::connection()
     48 {
     49     if (!m_connection && frame()) {
     50         ASSERT(frame()->domWindow());
     51         m_connection = NetworkInformation::create(frame()->domWindow()->executionContext());
     52     }
     53     return m_connection.get();
     54 }
     55 
     56 void NavigatorNetworkInformation::trace(Visitor* visitor)
     57 {
     58     visitor->trace(m_connection);
     59     WillBeHeapSupplement<Navigator>::trace(visitor);
     60     DOMWindowProperty::trace(visitor);
     61 }
     62 
     63 } // namespace blink
     64