tor-browser

The Tor Browser
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JSWindowActorChild.cpp (4489B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
      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 "mozilla/dom/JSWindowActorChild.h"
      8 
      9 #include "JSIPCValueUtils.h"
     10 #include "mozilla/dom/BrowsingContext.h"
     11 #include "mozilla/dom/ContentChild.h"
     12 #include "mozilla/dom/JSIPCValue.h"
     13 #include "mozilla/dom/JSIPCValueUtils.h"
     14 #include "mozilla/dom/JSWindowActorBinding.h"
     15 #include "mozilla/dom/MessageManagerBinding.h"
     16 #include "mozilla/dom/WindowGlobalChild.h"
     17 #include "mozilla/dom/WindowGlobalParent.h"
     18 #include "mozilla/dom/WindowProxyHolder.h"
     19 #include "nsGlobalWindowInner.h"
     20 
     21 namespace mozilla::dom {
     22 
     23 JSWindowActorChild::~JSWindowActorChild() { MOZ_ASSERT(!mManager); }
     24 
     25 JSObject* JSWindowActorChild::WrapObject(JSContext* aCx,
     26                                         JS::Handle<JSObject*> aGivenProto) {
     27  return JSWindowActorChild_Binding::Wrap(aCx, this, aGivenProto);
     28 }
     29 
     30 WindowGlobalChild* JSWindowActorChild::GetManager() const { return mManager; }
     31 
     32 WindowContext* JSWindowActorChild::GetWindowContext() const {
     33  return mManager ? mManager->WindowContext() : nullptr;
     34 }
     35 
     36 void JSWindowActorChild::Init(const nsACString& aName,
     37                              WindowGlobalChild* aManager) {
     38  MOZ_ASSERT(!mManager, "Cannot Init() a JSWindowActorChild twice!");
     39  mManager = aManager;
     40  bool sendTyped = !mManager->IsInProcess() && JSActorSupportsTypedSend(aName);
     41  JSActor::Init(aName, sendTyped);
     42 }
     43 
     44 void JSWindowActorChild::SendRawMessage(
     45    const JSActorMessageMeta& aMeta, JSIPCValue&& aData,
     46    UniquePtr<ipc::StructuredCloneData> aStack, ErrorResult& aRv) {
     47  if (!CanSend() || !mManager || !mManager->CanSend()) {
     48    aRv.ThrowInvalidStateError("JSWindowActorChild cannot send at the moment");
     49    return;
     50  }
     51 
     52  if (mManager->IsInProcess()) {
     53    SendRawMessageInProcess(
     54        aMeta, std::move(aData), std::move(aStack),
     55        [manager{mManager}]() { return manager->GetParentActor(); });
     56    return;
     57  }
     58 
     59  // Cross-process case - send data over WindowGlobalChild to other side.
     60  JSIPCValueUtils::SCDHolder holder;
     61  if (!JSIPCValueUtils::PrepareForSending(holder, aData)) {
     62    aRv.ThrowDataCloneError(
     63        nsPrintfCString("JSWindowActorChild serialization error: cannot "
     64                        "clone, in actor '%s'",
     65                        PromiseFlatCString(aMeta.actorName()).get()));
     66    return;
     67  }
     68 
     69  UniquePtr<ClonedMessageData> stackData;
     70  if (aStack) {
     71    stackData = MakeUnique<ClonedMessageData>();
     72    if (!aStack->BuildClonedMessageData(*stackData)) {
     73      stackData.reset();
     74    }
     75  }
     76 
     77  if (!mManager->SendRawMessage(aMeta, aData, stackData)) {
     78    aRv.ThrowOperationError(
     79        nsPrintfCString("JSWindowActorChild send error in actor '%s'",
     80                        PromiseFlatCString(aMeta.actorName()).get()));
     81    return;
     82  }
     83 }
     84 
     85 Document* JSWindowActorChild::GetDocument(ErrorResult& aRv) {
     86  if (!mManager) {
     87    ThrowStateErrorForGetter("document", aRv);
     88    return nullptr;
     89  }
     90 
     91  nsGlobalWindowInner* window = mManager->GetWindowGlobal();
     92  return window ? window->GetDocument() : nullptr;
     93 }
     94 
     95 BrowsingContext* JSWindowActorChild::GetBrowsingContext(ErrorResult& aRv) {
     96  if (!mManager) {
     97    ThrowStateErrorForGetter("browsingContext", aRv);
     98    return nullptr;
     99  }
    100 
    101  return mManager->BrowsingContext();
    102 }
    103 
    104 nsIDocShell* JSWindowActorChild::GetDocShell(ErrorResult& aRv) {
    105  if (!mManager) {
    106    ThrowStateErrorForGetter("docShell", aRv);
    107    return nullptr;
    108  }
    109 
    110  return mManager->BrowsingContext()->GetDocShell();
    111 }
    112 
    113 Nullable<WindowProxyHolder> JSWindowActorChild::GetContentWindow(
    114    ErrorResult& aRv) {
    115  if (!mManager) {
    116    ThrowStateErrorForGetter("contentWindow", aRv);
    117    return nullptr;
    118  }
    119 
    120  if (nsGlobalWindowInner* window = mManager->GetWindowGlobal()) {
    121    if (window->IsCurrentInnerWindow()) {
    122      return WindowProxyHolder(window->GetBrowsingContext());
    123    }
    124  }
    125 
    126  return nullptr;
    127 }
    128 
    129 void JSWindowActorChild::ClearManager() { mManager = nullptr; }
    130 
    131 NS_IMPL_CYCLE_COLLECTION_INHERITED(JSWindowActorChild, JSActor, mManager)
    132 
    133 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(JSWindowActorChild)
    134 NS_INTERFACE_MAP_END_INHERITING(JSActor)
    135 
    136 NS_IMPL_ADDREF_INHERITED(JSWindowActorChild, JSActor)
    137 NS_IMPL_RELEASE_INHERITED(JSWindowActorChild, JSActor)
    138 
    139 }  // namespace mozilla::dom