tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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FetchObserver.cpp (2512B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "FetchObserver.h"
      8 
      9 #include "mozilla/dom/Event.h"
     10 #include "mozilla/dom/EventBinding.h"
     11 
     12 namespace mozilla::dom {
     13 
     14 NS_IMPL_CYCLE_COLLECTION_CLASS(FetchObserver)
     15 
     16 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(FetchObserver,
     17                                                  DOMEventTargetHelper)
     18 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
     19 
     20 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(FetchObserver,
     21                                                DOMEventTargetHelper)
     22 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
     23 
     24 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FetchObserver)
     25 NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
     26 
     27 NS_IMPL_ADDREF_INHERITED(FetchObserver, DOMEventTargetHelper)
     28 NS_IMPL_RELEASE_INHERITED(FetchObserver, DOMEventTargetHelper)
     29 
     30 FetchObserver::FetchObserver(nsIGlobalObject* aGlobal,
     31                             AbortSignalImpl* aSignalImpl)
     32    : DOMEventTargetHelper(aGlobal), mState(FetchState::Requesting) {
     33  if (aSignalImpl) {
     34    Follow(aSignalImpl);
     35  }
     36 }
     37 
     38 JSObject* FetchObserver::WrapObject(JSContext* aCx,
     39                                    JS::Handle<JSObject*> aGivenProto) {
     40  return FetchObserver_Binding::Wrap(aCx, this, aGivenProto);
     41 }
     42 
     43 FetchState FetchObserver::State() const { return mState; }
     44 
     45 void FetchObserver::RunAbortAlgorithm() { SetState(FetchState::Aborted); }
     46 
     47 void FetchObserver::SetState(FetchState aState) {
     48  MOZ_ASSERT(mState < aState);
     49 
     50  if (mState == FetchState::Aborted || mState == FetchState::Errored ||
     51      mState == FetchState::Complete) {
     52    // We are already in a final state.
     53    return;
     54  }
     55 
     56  // We cannot pass from Requesting to Complete directly.
     57  if (mState == FetchState::Requesting && aState == FetchState::Complete) {
     58    SetState(FetchState::Responding);
     59  }
     60 
     61  mState = aState;
     62 
     63  if (mState == FetchState::Aborted || mState == FetchState::Errored ||
     64      mState == FetchState::Complete) {
     65    Unfollow();
     66  }
     67 
     68  EventInit init;
     69  init.mBubbles = false;
     70  init.mCancelable = false;
     71 
     72  // TODO which kind of event should we dispatch here?
     73 
     74  RefPtr<Event> event = Event::Constructor(this, u"statechange"_ns, init);
     75  event->SetTrusted(true);
     76 
     77  DispatchEvent(*event);
     78 }
     79 
     80 }  // namespace mozilla::dom