Home | History | Annotate | Download | only in serviceworkers 
      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/serviceworkers/NavigatorServiceWorker.h"
      7 
      8 #include "core/dom/Document.h"
      9 #include "core/frame/LocalDOMWindow.h"
     10 #include "core/frame/LocalFrame.h"
     11 #include "core/frame/Navigator.h"
     12 #include "modules/serviceworkers/ServiceWorkerContainer.h"
     13 
     14 namespace blink {
     15 
     16 NavigatorServiceWorker::NavigatorServiceWorker(Navigator& navigator)
     17     : DOMWindowProperty(navigator.frame())
     18 {
     19 }
     20 
     21 DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(NavigatorServiceWorker);
     22 
     23 NavigatorServiceWorker* NavigatorServiceWorker::from(Document& document)
     24 {
     25     if (!document.frame() || !document.frame()->domWindow())
     26         return 0;
     27     Navigator& navigator = document.frame()->domWindow()->navigator();
     28     return &from(navigator);
     29 }
     30 
     31 NavigatorServiceWorker& NavigatorServiceWorker::from(Navigator& navigator)
     32 {
     33     NavigatorServiceWorker* supplement = toNavigatorServiceWorker(navigator);
     34     if (!supplement) {
     35         supplement = new NavigatorServiceWorker(navigator);
     36         provideTo(navigator, supplementName(), adoptPtrWillBeNoop(supplement));
     37         // Initialize ServiceWorkerContainer too.
     38         supplement->serviceWorker();
     39     }
     40     return *supplement;
     41 }
     42 
     43 NavigatorServiceWorker* NavigatorServiceWorker::toNavigatorServiceWorker(Navigator& navigator)
     44 {
     45     return static_cast<NavigatorServiceWorker*>(WillBeHeapSupplement<Navigator>::from(navigator, supplementName()));
     46 }
     47 
     48 const char* NavigatorServiceWorker::supplementName()
     49 {
     50     return "NavigatorServiceWorker";
     51 }
     52 
     53 ServiceWorkerContainer* NavigatorServiceWorker::serviceWorker(Navigator& navigator)
     54 {
     55     return NavigatorServiceWorker::from(navigator).serviceWorker();
     56 }
     57 
     58 ServiceWorkerContainer* NavigatorServiceWorker::serviceWorker()
     59 {
     60     if (!m_serviceWorker && frame()) {
     61         ASSERT(frame()->domWindow());
     62         m_serviceWorker = ServiceWorkerContainer::create(frame()->domWindow()->executionContext());
     63     }
     64     return m_serviceWorker.get();
     65 }
     66 
     67 void NavigatorServiceWorker::willDetachGlobalObjectFromFrame()
     68 {
     69     if (m_serviceWorker) {
     70         m_serviceWorker->willBeDetachedFromFrame();
     71         m_serviceWorker = nullptr;
     72     }
     73 }
     74 
     75 void NavigatorServiceWorker::trace(Visitor* visitor)
     76 {
     77     visitor->trace(m_serviceWorker);
     78     WillBeHeapSupplement<Navigator>::trace(visitor);
     79     DOMWindowProperty::trace(visitor);
     80 }
     81 
     82 } // namespace blink
     83