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       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
       2             :  *
       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 "WebBrowserPersistDocumentParent.h"
       8             : 
       9             : #include "mozilla/ipc/IPCStreamUtils.h"
      10             : #include "mozilla/dom/PContentParent.h"
      11             : #include "nsIInputStream.h"
      12             : #include "nsThreadUtils.h"
      13             : #include "WebBrowserPersistResourcesParent.h"
      14             : #include "WebBrowserPersistSerializeParent.h"
      15             : #include "WebBrowserPersistRemoteDocument.h"
      16             : 
      17             : namespace mozilla {
      18             : 
      19           0 : WebBrowserPersistDocumentParent::WebBrowserPersistDocumentParent()
      20           0 : : mReflection(nullptr)
      21             : {
      22           0 : }
      23             : 
      24             : void
      25           0 : WebBrowserPersistDocumentParent::SetOnReady(nsIWebBrowserPersistDocumentReceiver* aOnReady)
      26             : {
      27           0 :     MOZ_ASSERT(aOnReady);
      28           0 :     MOZ_ASSERT(!mOnReady);
      29           0 :     MOZ_ASSERT(!mReflection);
      30           0 :     mOnReady = aOnReady;
      31           0 : }
      32             : 
      33             : void
      34           0 : WebBrowserPersistDocumentParent::ActorDestroy(ActorDestroyReason aWhy)
      35             : {
      36           0 :     if (mReflection) {
      37           0 :         mReflection->ActorDestroy();
      38           0 :         mReflection = nullptr;
      39             :     }
      40           0 :     if (mOnReady) {
      41             :         // Bug 1202887: If this is part of a subtree destruction, then
      42             :         // anything which could cause another actor in that subtree to
      43             :         // be Send__delete__()ed will cause use-after-free -- such as
      44             :         // dropping the last reference to another document's
      45             :         // WebBrowserPersistRemoteDocument.  To avoid that, defer the
      46             :         // callback until after the entire subtree is destroyed.
      47           0 :         nsCOMPtr<nsIRunnable> errorLater = NewRunnableMethod<nsresult>(
      48             :           "nsIWebBrowserPersistDocumentReceiver::OnError",
      49             :           mOnReady,
      50             :           &nsIWebBrowserPersistDocumentReceiver::OnError,
      51           0 :           NS_ERROR_FAILURE);
      52           0 :         NS_DispatchToCurrentThread(errorLater);
      53           0 :         mOnReady = nullptr;
      54             :     }
      55           0 : }
      56             : 
      57           0 : WebBrowserPersistDocumentParent::~WebBrowserPersistDocumentParent()
      58             : {
      59           0 :     MOZ_RELEASE_ASSERT(!mReflection);
      60           0 :     MOZ_ASSERT(!mOnReady);
      61           0 : }
      62             : 
      63             : mozilla::ipc::IPCResult
      64           0 : WebBrowserPersistDocumentParent::RecvAttributes(const Attrs& aAttrs,
      65             :                                                 const OptionalIPCStream& aPostStream)
      66             : {
      67             :     // Deserialize the postData unconditionally so that fds aren't leaked.
      68           0 :     nsCOMPtr<nsIInputStream> postData = mozilla::ipc::DeserializeIPCStream(aPostStream);
      69           0 :     if (!mOnReady || mReflection) {
      70           0 :         return IPC_FAIL_NO_REASON(this);
      71             :     }
      72           0 :     mReflection = new WebBrowserPersistRemoteDocument(this, aAttrs, postData);
      73           0 :     RefPtr<WebBrowserPersistRemoteDocument> reflection = mReflection;
      74           0 :     mOnReady->OnDocumentReady(reflection);
      75           0 :     mOnReady = nullptr;
      76           0 :     return IPC_OK();
      77             : }
      78             : 
      79             : mozilla::ipc::IPCResult
      80           0 : WebBrowserPersistDocumentParent::RecvInitFailure(const nsresult& aFailure)
      81             : {
      82           0 :     if (!mOnReady || mReflection) {
      83           0 :         return IPC_FAIL_NO_REASON(this);
      84             :     }
      85           0 :     mOnReady->OnError(aFailure);
      86           0 :     mOnReady = nullptr;
      87             :     // Warning: Send__delete__ deallocates this object.
      88           0 :     IProtocol* mgr = Manager();
      89           0 :     if (!Send__delete__(this)) {
      90           0 :         return IPC_FAIL_NO_REASON(mgr);
      91             :     }
      92           0 :     return IPC_OK();
      93             : }
      94             : 
      95             : PWebBrowserPersistResourcesParent*
      96           0 : WebBrowserPersistDocumentParent::AllocPWebBrowserPersistResourcesParent()
      97             : {
      98           0 :     MOZ_CRASH("Don't use this; construct the actor directly and AddRef.");
      99             :     return nullptr;
     100             : }
     101             : 
     102             : bool
     103           0 : WebBrowserPersistDocumentParent::DeallocPWebBrowserPersistResourcesParent(PWebBrowserPersistResourcesParent* aActor)
     104             : {
     105             :     // Turn the ref held by IPC back into an nsRefPtr.
     106             :     RefPtr<WebBrowserPersistResourcesParent> actor =
     107           0 :         already_AddRefed<WebBrowserPersistResourcesParent>(
     108           0 :             static_cast<WebBrowserPersistResourcesParent*>(aActor));
     109           0 :     return true;
     110             : }
     111             : 
     112             : PWebBrowserPersistSerializeParent*
     113           0 : WebBrowserPersistDocumentParent::AllocPWebBrowserPersistSerializeParent(
     114             :         const WebBrowserPersistURIMap& aMap,
     115             :         const nsCString& aRequestedContentType,
     116             :         const uint32_t& aEncoderFlags,
     117             :         const uint32_t& aWrapColumn)
     118             : {
     119           0 :     MOZ_CRASH("Don't use this; construct the actor directly.");
     120             :     return nullptr;
     121             : }
     122             : 
     123             : bool
     124           0 : WebBrowserPersistDocumentParent::DeallocPWebBrowserPersistSerializeParent(PWebBrowserPersistSerializeParent* aActor)
     125             : {
     126           0 :     delete aActor;
     127           0 :     return true;
     128             : }
     129             : 
     130             : } // namespace mozilla