Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1612 insertions, 0 deletions

diff --git a/uriloader/base/nsDocLoader.cpp b/uriloader/base/nsDocLoader.cpp
new file mode 100644
index 0000000000..e1e46ccdce
--- /dev/null
+++ b/uriloader/base/nsDocLoader.cpp
@@ -0,0 +1,1612 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nspr.h"
+#include "mozilla/dom/BrowserChild.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/BasicEvents.h"
+#include "mozilla/Components.h"
+#include "mozilla/EventDispatcher.h"
+#include "mozilla/Logging.h"
+#include "mozilla/IntegerPrintfMacros.h"
+#include "mozilla/PresShell.h"
+
+#include "nsDocLoader.h"
+#include "nsDocShell.h"
+#include "nsLoadGroup.h"
+#include "nsNetUtil.h"
+#include "nsIHttpChannel.h"
+#include "nsIWebNavigation.h"
+#include "nsIWebProgressListener2.h"
+
+#include "nsString.h"
+
+#include "nsCOMPtr.h"
+#include "nscore.h"
+#include "nsIWeakReferenceUtils.h"
+#include "nsQueryObject.h"
+
+#include "nsPIDOMWindow.h"
+#include "nsGlobalWindow.h"
+
+#include "nsIStringBundle.h"
+
+#include "nsIDocShell.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/DocGroup.h"
+#include "nsPresContext.h"
+#include "nsIAsyncVerifyRedirectCallback.h"
+#include "nsIBrowserDOMWindow.h"
+#include "nsGlobalWindow.h"
+#include "mozilla/ThrottledEventQueue.h"
+using namespace mozilla;
+using mozilla::DebugOnly;
+using mozilla::eLoad;
+using mozilla::EventDispatcher;
+using mozilla::LogLevel;
+using mozilla::WidgetEvent;
+using mozilla::dom::BrowserChild;
+using mozilla::dom::BrowsingContext;
+using mozilla::dom::Document;
+
+//
+// Log module for nsIDocumentLoader logging...
+//
+// To enable logging (see mozilla/Logging.h for full details):
+//
+//    set MOZ_LOG=DocLoader:5
+//    set MOZ_LOG_FILE=debug.log
+//
+// this enables LogLevel::Debug level information and places all output in
+// the file 'debug.log'.
+//
+mozilla::LazyLogModule gDocLoaderLog("DocLoader");
+
+#if defined(DEBUG)
+void GetURIStringFromRequest(nsIRequest* request, nsACString& name) {
+  if (request)
+    request->GetName(name);
+  else
+    name.AssignLiteral("???");
+}
+#endif /* DEBUG */
+
+void nsDocLoader::RequestInfoHashInitEntry(PLDHashEntryHdr* entry,
+                                           const void* key) {
+  // Initialize the entry with placement new
+  new (entry) nsRequestInfo(key);
+}
+
+void nsDocLoader::RequestInfoHashClearEntry(PLDHashTable* table,
+                                            PLDHashEntryHdr* entry) {
+  nsRequestInfo* info = static_cast<nsRequestInfo*>(entry);
+  info->~nsRequestInfo();
+}
+
+// this is used for mListenerInfoList.Contains()
+template <>
+class nsDefaultComparator<nsDocLoader::nsListenerInfo,
+                          nsIWebProgressListener*> {
+ public:
+  bool Equals(const nsDocLoader::nsListenerInfo& aInfo,
+              nsIWebProgressListener* const& aListener) const {
+    nsCOMPtr<nsIWebProgressListener> listener =
+        do_QueryReferent(aInfo.mWeakListener);
+    return aListener == listener;
+  }
+};
+
+/* static */ const PLDHashTableOps nsDocLoader::sRequestInfoHashOps = {
+    PLDHashTable::HashVoidPtrKeyStub, PLDHashTable::MatchEntryStub,
+    PLDHashTable::MoveEntryStub, nsDocLoader::RequestInfoHashClearEntry,
+    nsDocLoader::RequestInfoHashInitEntry};
+
+nsDocLoader::nsDocLoader(bool aNotifyAboutBackgroundRequests)
+    : mParent(nullptr),
+      mProgressStateFlags(0),
+      mCurrentSelfProgress(0),
+      mMaxSelfProgress(0),
+      mCurrentTotalProgress(0),
+      mMaxTotalProgress(0),
+      mRequestInfoHash(&sRequestInfoHashOps, sizeof(nsRequestInfo)),
+      mCompletedTotalProgress(0),
+      mIsLoadingDocument(false),
+      mIsRestoringDocument(false),
+      mDontFlushLayout(false),
+      mIsFlushingLayout(false),
+      mTreatAsBackgroundLoad(false),
+      mHasFakeOnLoadDispatched(false),
+      mIsReadyToHandlePostMessage(false),
+      mDocumentOpenedButNotLoaded(false),
+      mNotifyAboutBackgroundRequests(aNotifyAboutBackgroundRequests) {
+  ClearInternalProgress();
+
+  MOZ_LOG(gDocLoaderLog, LogLevel::Debug, ("DocLoader:%p: created.\n", this));
+}
+
+nsresult nsDocLoader::SetDocLoaderParent(nsDocLoader* aParent) {
+  mParent = aParent;
+  return NS_OK;
+}
+
+nsresult nsDocLoader::Init() {
+  RefPtr<net::nsLoadGroup> loadGroup = new net::nsLoadGroup();
+  nsresult rv = loadGroup->Init();
+  if (NS_FAILED(rv)) return rv;
+
+  loadGroup->SetGroupObserver(this, mNotifyAboutBackgroundRequests);
+
+  mLoadGroup = loadGroup;
+
+  MOZ_LOG(gDocLoaderLog, LogLevel::Debug,
+          ("DocLoader:%p: load group %p.\n", this, mLoadGroup.get()));
+
+  return NS_OK;
+}
+
+nsresult nsDocLoader::InitWithBrowsingContext(
+    BrowsingContext* aBrowsingContext) {
+  RefPtr<net::nsLoadGroup> loadGroup = new net::nsLoadGroup();
+  if (!aBrowsingContext->GetRequestContextId()) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+  nsresult rv = loadGroup->InitWithRequestContextId(
+      aBrowsingContext->GetRequestContextId());
+  if (NS_FAILED(rv)) return rv;
+
+  loadGroup->SetGroupObserver(this, mNotifyAboutBackgroundRequests);
+
+  mLoadGroup = loadGroup;
+
+  MOZ_LOG(gDocLoaderLog, LogLevel::Debug,
+          ("DocLoader:%p: load group %p.\n", this, mLoadGroup.get()));
+
+  return NS_OK;
+}
+
+nsDocLoader::~nsDocLoader() {
+  /*
+          |ClearWeakReferences()| here is intended to prevent people holding
+     weak references from re-entering this destructor since |QueryReferent()|
+     will |AddRef()| me, and the subsequent |Release()| will try to destroy me.
+     At this point there should be only weak references remaining (otherwise, we
+     wouldn't be getting destroyed).
+
+          An alternative would be incrementing our refcount (consider it a
+     compressed flag saying "Don't re-destroy.").  I haven't yet decided which
+     is better. [scc]
+  */
+  // XXXbz now that NS_IMPL_RELEASE stabilizes by setting refcount to 1, is
+  // this needed?
+  ClearWeakReferences();
+
+  Destroy();
+
+  MOZ_LOG(gDocLoaderLog, LogLevel::Debug, ("DocLoader:%p: deleted.\n", this));
+}
+
+/*
+ * Implementation of ISupports methods...
+ */
+NS_IMPL_CYCLE_COLLECTING_ADDREF(nsDocLoader)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(nsDocLoader)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsDocLoader)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDocumentLoader)
+  NS_INTERFACE_MAP_ENTRY(nsIRequestObserver)
+  NS_INTERFACE_MAP_ENTRY(nsIDocumentLoader)
+  NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
+  NS_INTERFACE_MAP_ENTRY(nsIWebProgress)
+  NS_INTERFACE_MAP_ENTRY(nsIProgressEventSink)
+  NS_INTERFACE_MAP_ENTRY(nsIInterfaceRequestor)
+  NS_INTERFACE_MAP_ENTRY(nsIChannelEventSink)
+  NS_INTERFACE_MAP_ENTRY(nsISupportsPriority)
+  NS_INTERFACE_MAP_ENTRY_CONCRETE(nsDocLoader)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTION_WEAK(nsDocLoader, mChildrenInOnload)
+
+/*
+ * Implementation of nsIInterfaceRequestor methods...
+ */
+NS_IMETHODIMP nsDocLoader::GetInterface(const nsIID& aIID, void** aSink) {
+  nsresult rv = NS_ERROR_NO_INTERFACE;
+
+  NS_ENSURE_ARG_POINTER(aSink);
+
+  if (aIID.Equals(NS_GET_IID(nsILoadGroup))) {
+    *aSink = mLoadGroup;
+    NS_IF_ADDREF((nsISupports*)*aSink);
+    rv = NS_OK;
+  } else {
+    rv = QueryInterface(aIID, aSink);
+  }
+
+  return rv;
+}
+
+/* static */
+already_AddRefed<nsDocLoader> nsDocLoader::GetAsDocLoader(
+    nsISupports* aSupports) {
+  RefPtr<nsDocLoader> ret = do_QueryObject(aSupports);
+  return ret.forget();
+}
+
+/* static */
+nsresult nsDocLoader::AddDocLoaderAsChildOfRoot(nsDocLoader* aDocLoader) {
+  nsCOMPtr<nsIDocumentLoader> docLoaderService =
+      components::DocLoader::Service();
+  NS_ENSURE_TRUE(docLoaderService, NS_ERROR_UNEXPECTED);
+
+  RefPtr<nsDocLoader> rootDocLoader = GetAsDocLoader(docLoaderService);
+  NS_ENSURE_TRUE(rootDocLoader, NS_ERROR_UNEXPECTED);
+
+  return rootDocLoader->AddChildLoader(aDocLoader);
+}
+
+// TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
+MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHODIMP nsDocLoader::Stop(void) {
+  nsresult rv = NS_OK;
+
+  MOZ_LOG(gDocLoaderLog, LogLevel::Debug,
+          ("DocLoader:%p: Stop() called\n", this));
+
+  NS_OBSERVER_ARRAY_NOTIFY_XPCOM_OBSERVERS(mChildList, Stop, ());
+
+  if (mLoadGroup) {
+    rv = mLoadGroup->CancelWithReason(NS_BINDING_ABORTED,
+                                      "nsDocLoader::Stop"_ns);
+  }
+
+  // Don't report that we're flushing layout so IsBusy returns false after a
+  // Stop call.
+  mIsFlushingLayout = false;
+
+  // Clear out mChildrenInOnload.  We're not going to fire our onload
+  // anyway at this point, and there's no issue with mChildrenInOnload
+  // after this, since mDocumentRequest will be null after the
+  // DocLoaderIsEmpty() call.
+  mChildrenInOnload.Clear();
+  nsCOMPtr<nsIDocShell> ds = do_QueryInterface(GetAsSupports(this));
+  Document* doc = ds ? ds->GetExtantDocument() : nullptr;
+  if (doc) {
+    doc->ClearOOPChildrenLoading();
+  }
+
+  // Make sure to call DocLoaderIsEmpty now so that we reset mDocumentRequest,
+  // etc, as needed.  We could be getting into here from a subframe onload, in
+  // which case the call to DocLoaderIsEmpty() is coming but hasn't quite
+  // happened yet, Canceling the loadgroup did nothing (because it was already
+  // empty), and we're about to start a new load (which is what triggered this
+  // Stop() call).
+
+  // XXXbz If the child frame loadgroups were requests in mLoadgroup, I suspect
+  // we wouldn't need the call here....
+
+  NS_ASSERTION(!IsBusy(), "Shouldn't be busy here");
+
+  // If Cancelling the load group only had pending subresource requests, then
+  // the group status will still be success, and we would fire the load event.
+  // We want to avoid that when we're aborting the load, so override the status
+  // with an explicit NS_BINDING_ABORTED value.
+  DocLoaderIsEmpty(false, Some(NS_BINDING_ABORTED));
+
+  return rv;
+}
+
+bool nsDocLoader::TreatAsBackgroundLoad() { return mTreatAsBackgroundLoad; }
+
+void nsDocLoader::SetBackgroundLoadIframe() { mTreatAsBackgroundLoad = true; }
+
+bool nsDocLoader::IsBusy() {
+  nsresult rv;
+
+  //
+  // A document loader is busy if either:
+  //
+  //   1. One of its children is in the middle of an onload handler.  Note that
+  //      the handler may have already removed this child from mChildList!
+  //   2. It is currently loading a document and either has parts of it still
+  //      loading, or has a busy child docloader.
+  //   3. It's currently flushing layout in DocLoaderIsEmpty().
+  //
+
+  nsCOMPtr<nsIDocShell> ds = do_QueryInterface(GetAsSupports(this));
+  Document* doc = ds ? ds->GetExtantDocument() : nullptr;
+  if (!mChildrenInOnload.IsEmpty() || (doc && doc->HasOOPChildrenLoading()) ||
+      mIsFlushingLayout) {
+    return true;
+  }
+
+  /* Is this document loader busy? */
+  if (!IsBlockingLoadEvent()) {
+    return false;
+  }
+
+  // Check if any in-process sub-document is awaiting its 'load' event:
+  bool busy;
+  rv = mLoadGroup->IsPending(&busy);
+  if (NS_FAILED(rv)) {
+    return false;
+  }
+  if (busy) {
+    return true;
+  }
+
+  /* check its child document loaders... */
+  uint32_t count = mChildList.Length();
+  for (uint32_t i = 0; i < count; i++) {
+    nsIDocumentLoader* loader = ChildAt(i);
+
+    // If 'dom.cross_origin_iframes_loaded_in_background' is set, the parent
+    // document treats cross domain iframes as background loading frame
+    if (loader && static_cast<nsDocLoader*>(loader)->TreatAsBackgroundLoad()) {
+      continue;
+    }
+    // This is a safe cast, because we only put nsDocLoader objects into the
+    // array
+    if (loader && static_cast<nsDocLoader*>(loader)->IsBusy()) return true;
+  }
+
+  return false;
+}
+
+NS_IMETHODIMP
+nsDocLoader::GetContainer(nsISupports** aResult) {
+  NS_ADDREF(*aResult = static_cast<nsIDocumentLoader*>(this));
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsDocLoader::GetLoadGroup(nsILoadGroup** aResult) {
+  nsresult rv = NS_OK;
+
+  if (nullptr == aResult) {
+    rv = NS_ERROR_NULL_POINTER;
+  } else {
+    *aResult = mLoadGroup;
+    NS_IF_ADDREF(*aResult);
+  }
+  return rv;
+}
+
+void nsDocLoader::Destroy() {
+  Stop();
+
+  // Remove the document loader from the parent list of loaders...
+  if (mParent) {
+    DebugOnly<nsresult> rv = mParent->RemoveChildLoader(this);
+    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "RemoveChildLoader failed");
+  }
+
+  // Release all the information about network requests...
+  ClearRequestInfoHash();
+
+  mListenerInfoList.Clear();
+  mListenerInfoList.Compact();
+
+  mDocumentRequest = nullptr;
+
+  if (mLoadGroup) mLoadGroup->SetGroupObserver(nullptr);
+
+  DestroyChildren();
+}
+
+void nsDocLoader::DestroyChildren() {
+  uint32_t count = mChildList.Length();
+  // if the doc loader still has children...we need to enumerate the
+  // children and make them null out their back ptr to the parent doc
+  // loader
+  for (uint32_t i = 0; i < count; i++) {
+    nsIDocumentLoader* loader = ChildAt(i);
+
+    if (loader) {
+      // This is a safe cast, as we only put nsDocLoader objects into the
+      // array
+      DebugOnly<nsresult> rv =
+          static_cast<nsDocLoader*>(loader)->SetDocLoaderParent(nullptr);
+      NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "SetDocLoaderParent failed");
+    }
+  }
+  mChildList.Clear();
+}
+
+NS_IMETHODIMP
+nsDocLoader::OnStartRequest(nsIRequest* request) {
+  // called each time a request is added to the group.
+
+  // Some docloaders deal with background requests in their OnStartRequest
+  // override, but here we don't want to do anything with them, so return early.
+  nsLoadFlags loadFlags = 0;
+  request->GetLoadFlags(&loadFlags);
+  if (loadFlags & nsIRequest::LOAD_BACKGROUND) {
+    return NS_OK;
+  }
+
+  if (MOZ_LOG_TEST(gDocLoaderLog, LogLevel::Debug)) {
+    nsAutoCString name;
+    request->GetName(name);
+
+    uint32_t count = 0;
+    if (mLoadGroup) mLoadGroup->GetActiveCount(&count);
+
+    MOZ_LOG(gDocLoaderLog, LogLevel::Debug,
+            ("DocLoader:%p: OnStartRequest[%p](%s) mIsLoadingDocument=%s, %u "
+             "active URLs",
+             this, request, name.get(), (mIsLoadingDocument ? "true" : "false"),
+             count));
+  }
+
+  bool justStartedLoading = false;
+
+  if (!mIsLoadingDocument && (loadFlags & nsIChannel::LOAD_DOCUMENT_URI)) {
+    justStartedLoading = true;
+    mIsLoadingDocument = true;
+    mDocumentOpenedButNotLoaded = false;
+    ClearInternalProgress();  // only clear our progress if we are starting a
+                              // new load....
+  }
+
+  //
+  // Create a new nsRequestInfo for the request that is starting to
+  // load...
+  //
+  AddRequestInfo(request);
+
+  //
+  // Only fire a doStartDocumentLoad(...) if the document loader
+  // has initiated a load...  Otherwise, this notification has
+  // resulted from a request being added to the load group.
+  //
+  if (mIsLoadingDocument) {
+    if (loadFlags & nsIChannel::LOAD_DOCUMENT_URI) {
+      //
+      // Make sure that the document channel is null at this point...
+      // (unless its been redirected)
+      //
+      NS_ASSERTION(
+          (loadFlags & nsIChannel::LOAD_REPLACE) || !(mDocumentRequest.get()),
+          "Overwriting an existing document channel!");
+
+      // This request is associated with the entire document...
+      mDocumentRequest = request;
+      mLoadGroup->SetDefaultLoadRequest(request);
+
+      // Only fire the start document load notification for the first
+      // document URI...  Do not fire it again for redirections
+      //
+      if (justStartedLoading) {
+        // Update the progress status state
+        mProgressStateFlags = nsIWebProgressListener::STATE_START;
+
+        // Fire the start document load notification
+        doStartDocumentLoad();
+        return NS_OK;
+      }
+    }
+  }
+
+  NS_ASSERTION(!mIsLoadingDocument || mDocumentRequest,
+               "mDocumentRequest MUST be set for the duration of a page load!");
+
+  // This is the only way to catch document request start event after a redirect
+  // has occured without changing inherited Firefox behaviour significantly.
+  // Problem description:
+  // The combination of |STATE_START + STATE_IS_DOCUMENT| is only sent for
+  // initial request (see |doStartDocumentLoad| call above).
+  // And |STATE_REDIRECTING + STATE_IS_DOCUMENT| is sent with old channel, which
+  // makes it impossible to filter by destination URL (see
+  // |AsyncOnChannelRedirect| implementation).
+  // Fixing any of those bugs may cause unpredictable consequences in any part
+  // of the browser, so we just add a custom flag for this exact situation.
+  int32_t extraFlags = 0;
+  if (mIsLoadingDocument && !justStartedLoading &&
+      (loadFlags & nsIChannel::LOAD_DOCUMENT_URI) &&
+      (loadFlags & nsIChannel::LOAD_REPLACE)) {
+    extraFlags = nsIWebProgressListener::STATE_IS_REDIRECTED_DOCUMENT;
+  }
+  doStartURLLoad(request, extraFlags);
+
+  return NS_OK;
+}
+
+// TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
+MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHODIMP
+nsDocLoader::OnStopRequest(nsIRequest* aRequest, nsresult aStatus) {
+  // Some docloaders deal with background requests in their OnStopRequest
+  // override, but here we don't want to do anything with them, so return early.
+  nsLoadFlags lf = 0;
+  aRequest->GetLoadFlags(&lf);
+  if (lf & nsIRequest::LOAD_BACKGROUND) {
+    return NS_OK;
+  }
+
+  nsresult rv = NS_OK;
+
+  if (MOZ_LOG_TEST(gDocLoaderLog, LogLevel::Debug)) {
+    nsAutoCString name;
+    aRequest->GetName(name);
+
+    uint32_t count = 0;
+    if (mLoadGroup) mLoadGroup->GetActiveCount(&count);
+
+    MOZ_LOG(gDocLoaderLog, LogLevel::Debug,
+            ("DocLoader:%p: OnStopRequest[%p](%s) status=%" PRIx32
+             " mIsLoadingDocument=%s, mDocumentOpenedButNotLoaded=%s,"
+             " %u active URLs",
+             this, aRequest, name.get(), static_cast<uint32_t>(aStatus),
+             (mIsLoadingDocument ? "true" : "false"),
+             (mDocumentOpenedButNotLoaded ? "true" : "false"), count));
+  }
+
+  bool fireTransferring = false;
+
+  //
+  // Set the Maximum progress to the same value as the current progress.
+  // Since the URI has finished loading, all the data is there.  Also,
+  // this will allow a more accurate estimation of the max progress (in case
+  // the old value was unknown ie. -1)
+  //
+  nsRequestInfo* info = GetRequestInfo(aRequest);
+  if (info) {
+    // Null out mLastStatus now so we don't find it when looking for
+    // status from now on.  This destroys the nsStatusInfo and hence
+    // removes it from our list.
+    info->mLastStatus = nullptr;
+
+    int64_t oldMax = info->mMaxProgress;
+
+    info->mMaxProgress = info->mCurrentProgress;
+
+    //
+    // If a request whose content-length was previously unknown has just
+    // finished loading, then use this new data to try to calculate a
+    // mMaxSelfProgress...
+    //
+    if ((oldMax < int64_t(0)) && (mMaxSelfProgress < int64_t(0))) {
+      mMaxSelfProgress = CalculateMaxProgress();
+    }
+
+    // As we know the total progress of this request now, save it to be part
+    // of CalculateMaxProgress() result. We need to remove the info from the
+    // hash, see bug 480713.
+    mCompletedTotalProgress += info->mMaxProgress;
+
+    //
+    // Determine whether a STATE_TRANSFERRING notification should be
+    // 'synthesized'.
+    //
+    // If nsRequestInfo::mMaxProgress (as stored in oldMax) and
+    // nsRequestInfo::mCurrentProgress are both 0, then the
+    // STATE_TRANSFERRING notification has not been fired yet...
+    //
+    if ((oldMax == 0) && (info->mCurrentProgress == 0)) {
+      nsCOMPtr<nsIChannel> channel(do_QueryInterface(aRequest));
+
+      // Only fire a TRANSFERRING notification if the request is also a
+      // channel -- data transfer requires a nsIChannel!
+      //
+      if (channel) {
+        if (NS_SUCCEEDED(aStatus)) {
+          fireTransferring = true;
+        }
+        //
+        // If the request failed (for any reason other than being
+        // redirected or retargeted), the TRANSFERRING notification can
+        // still be fired if a HTTP connection was established to a server.
+        //
+        else if (aStatus != NS_BINDING_REDIRECTED &&
+                 aStatus != NS_BINDING_RETARGETED) {
+          //
+          // Only if the load has been targeted (see bug 268483)...
+          //
+          if (lf & nsIChannel::LOAD_TARGETED) {
+            nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(aRequest));
+            if (httpChannel) {
+              uint32_t responseCode;
+              rv = httpChannel->GetResponseStatus(&responseCode);
+              if (NS_SUCCEEDED(rv)) {
+                //
+                // A valid server status indicates that a connection was
+                // established to the server... So, fire the notification
+                // even though a failure occurred later...
+                //
+                fireTransferring = true;
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+
+  if (fireTransferring) {
+    // Send a STATE_TRANSFERRING notification for the request.
+    int32_t flags;
+
+    flags = nsIWebProgressListener::STATE_TRANSFERRING |
+            nsIWebProgressListener::STATE_IS_REQUEST;
+    //
+    // Move the WebProgress into the STATE_TRANSFERRING state if necessary...
+    //
+    if (mProgressStateFlags & nsIWebProgressListener::STATE_START) {
+      mProgressStateFlags = nsIWebProgressListener::STATE_TRANSFERRING;
+
+      // Send STATE_TRANSFERRING for the document too...
+      flags |= nsIWebProgressListener::STATE_IS_DOCUMENT;
+    }
+
+    FireOnStateChange(this, aRequest, flags, NS_OK);
+  }
+
+  //
+  // Fire the OnStateChange(...) notification for stop request
+  //
+  doStopURLLoad(aRequest, aStatus);
+
+  // Clear this request out of the hash to avoid bypass of FireOnStateChange
+  // when address of the request is reused.
+  RemoveRequestInfo(aRequest);
+
+  // For the special case where the current document is an initial about:blank
+  // document, we may still have subframes loading, and keeping the DocLoader
+  // busy. In that case, if we have an error, we won't show it until those
+  // frames finish loading, which is nonsensical. So stop any subframe loads
+  // now.
+  if (NS_FAILED(aStatus) && aStatus != NS_BINDING_ABORTED &&
+      aStatus != NS_BINDING_REDIRECTED && aStatus != NS_BINDING_RETARGETED) {
+    if (RefPtr<Document> doc = do_GetInterface(GetAsSupports(this))) {
+      if (doc->IsInitialDocument()) {
+        NS_OBSERVER_ARRAY_NOTIFY_XPCOM_OBSERVERS(mChildList, Stop, ());
+      }
+    }
+  }
+
+  //
+  // Only fire the DocLoaderIsEmpty(...) if we may need to fire onload.
+  //
+  if (IsBlockingLoadEvent()) {
+    nsCOMPtr<nsIDocShell> ds =
+        do_QueryInterface(static_cast<nsIRequestObserver*>(this));
+    bool doNotFlushLayout = false;
+    if (ds) {
+      // Don't do unexpected layout flushes while we're in process of restoring
+      // a document from the bfcache.
+      ds->GetRestoringDocument(&doNotFlushLayout);
+    }
+    DocLoaderIsEmpty(!doNotFlushLayout);
+  }
+
+  return NS_OK;
+}
+
+nsresult nsDocLoader::RemoveChildLoader(nsDocLoader* aChild) {
+  nsresult rv = mChildList.RemoveElement(aChild) ? NS_OK : NS_ERROR_FAILURE;
+  if (NS_SUCCEEDED(rv)) {
+    rv = aChild->SetDocLoaderParent(nullptr);
+  }
+  return rv;
+}
+
+nsresult nsDocLoader::AddChildLoader(nsDocLoader* aChild) {
+  mChildList.AppendElement(aChild);
+  return aChild->SetDocLoaderParent(this);
+}
+
+NS_IMETHODIMP nsDocLoader::GetDocumentChannel(nsIChannel** aChannel) {
+  if (!mDocumentRequest) {
+    *aChannel = nullptr;
+    return NS_OK;
+  }
+
+  return CallQueryInterface(mDocumentRequest, aChannel);
+}
+
+void nsDocLoader::DocLoaderIsEmpty(bool aFlushLayout,
+                                   const Maybe<nsresult>& aOverrideStatus) {
+  if (IsBlockingLoadEvent()) {
+    /* In the unimagineably rude circumstance that onload event handlers
+       triggered by this function actually kill the window ... ok, it's
+       not unimagineable; it's happened ... this deathgrip keeps this object
+       alive long enough to survive this function call. */
+    nsCOMPtr<nsIDocumentLoader> kungFuDeathGrip(this);
+
+    // Don't flush layout if we're still busy.
+    if (IsBusy()) {
+      return;
+    }
+
+    NS_ASSERTION(!mIsFlushingLayout, "Someone screwed up");
+    // We may not have a document request if we are in a
+    // document.open() situation.
+    NS_ASSERTION(mDocumentRequest || mDocumentOpenedButNotLoaded,
+                 "No Document Request!");
+
+    // The load group for this DocumentLoader is idle.  Flush if we need to.
+    if (aFlushLayout && !mDontFlushLayout) {
+      nsCOMPtr<Document> doc = do_GetInterface(GetAsSupports(this));
+      if (doc) {
+        // We start loads from style resolution, so we need to flush out style
+        // no matter what.  If we have user fonts, we also need to flush layout,
+        // since the reflow is what starts font loads.
+        mozilla::FlushType flushType = mozilla::FlushType::Style;
+        // Be safe in case this presshell is in teardown now
+        doc->FlushUserFontSet();
+        if (doc->GetUserFontSet()) {
+          flushType = mozilla::FlushType::Layout;
+        }
+        mDontFlushLayout = mIsFlushingLayout = true;
+        doc->FlushPendingNotifications(flushType);
+        mDontFlushLayout = mIsFlushingLayout = false;
+      }
+    }
+
+    // And now check whether we're really busy; that might have changed with
+    // the layout flush.
+    //
+    // Note, mDocumentRequest can be null while mDocumentOpenedButNotLoaded is
+    // false if the flushing above re-entered this method.
+    if (IsBusy() || (!mDocumentRequest && !mDocumentOpenedButNotLoaded)) {
+      return;
+    }
+
+    if (mDocumentRequest) {
+      // Clear out our request info hash, now that our load really is done and
+      // we don't need it anymore to CalculateMaxProgress().
+      ClearInternalProgress();
+
+      MOZ_LOG(gDocLoaderLog, LogLevel::Debug,
+              ("DocLoader:%p: Is now idle...\n", this));
+
+      nsCOMPtr<nsIRequest> docRequest = mDocumentRequest;
+
+      mDocumentRequest = nullptr;
+      mIsLoadingDocument = false;
+
+      // Update the progress status state - the document is done
+      mProgressStateFlags = nsIWebProgressListener::STATE_STOP;
+
+      nsresult loadGroupStatus = NS_OK;
+      if (aOverrideStatus) {
+        loadGroupStatus = *aOverrideStatus;
+      } else {
+        mLoadGroup->GetStatus(&loadGroupStatus);
+      }
+
+      //
+      // New code to break the circular reference between
+      // the load group and the docloader...
+      //
+      mLoadGroup->SetDefaultLoadRequest(nullptr);
+
+      // Take a ref to our parent now so that we can call ChildDoneWithOnload()
+      // on it even if our onload handler removes us from the docloader tree.
+      RefPtr<nsDocLoader> parent = mParent;
+
+      // Note that if calling ChildEnteringOnload() on the parent returns false
+      // then calling our onload handler is not safe.  That can only happen on
+      // OOM, so that's ok.
+      if (!parent || parent->ChildEnteringOnload(this)) {
+        // Do nothing with our state after firing the
+        // OnEndDocumentLoad(...). The document loader may be loading a *new*
+        // document - if LoadDocument() was called from a handler!
+        //
+        doStopDocumentLoad(docRequest, loadGroupStatus);
+
+        NotifyDoneWithOnload(parent);
+      }
+    } else {
+      MOZ_ASSERT(mDocumentOpenedButNotLoaded);
+      mDocumentOpenedButNotLoaded = false;
+
+      // Make sure we do the ChildEnteringOnload/ChildDoneWithOnload even if we
+      // plan to skip firing our own load event, because otherwise we might
+      // never end up firing our parent's load event.
+      RefPtr<nsDocLoader> parent = mParent;
+      if (!parent || parent->ChildEnteringOnload(this)) {
+        nsresult loadGroupStatus = NS_OK;
+        mLoadGroup->GetStatus(&loadGroupStatus);
+        // Make sure we're not canceling the loadgroup.  If we are, then just
+        // like the normal navigation case we should not fire a load event.
+        if (NS_SUCCEEDED(loadGroupStatus) ||
+            loadGroupStatus == NS_ERROR_PARSED_DATA_CACHED) {
+          // Can "doc" or "window" ever come back null here?  Our state machine
+          // is complicated enough I wouldn't bet against it...
+          nsCOMPtr<Document> doc = do_GetInterface(GetAsSupports(this));
+          if (doc) {
+            doc->SetReadyStateInternal(Document::READYSTATE_COMPLETE,
+                                       /* updateTimingInformation = */ false);
+            doc->StopDocumentLoad();
+
+            nsCOMPtr<nsPIDOMWindowOuter> window = doc->GetWindow();
+            if (window && !doc->SkipLoadEventAfterClose()) {
+              if (!mozilla::dom::DocGroup::TryToLoadIframesInBackground() ||
+                  (mozilla::dom::DocGroup::TryToLoadIframesInBackground() &&
+                   !HasFakeOnLoadDispatched())) {
+                MOZ_LOG(gDocLoaderLog, LogLevel::Debug,
+                        ("DocLoader:%p: Firing load event for document.open\n",
+                         this));
+
+                // This is a very cut-down version of
+                // nsDocumentViewer::LoadComplete that doesn't do various things
+                // that are not relevant here because this wasn't an actual
+                // navigation.
+                WidgetEvent event(true, eLoad);
+                event.mFlags.mBubbles = false;
+                event.mFlags.mCancelable = false;
+                // Dispatching to |window|, but using |document| as the target,
+                // per spec.
+                event.mTarget = doc;
+                nsEventStatus unused = nsEventStatus_eIgnore;
+                doc->SetLoadEventFiring(true);
+                EventDispatcher::Dispatch(window, nullptr, &event, nullptr,
+                                          &unused);
+                doc->SetLoadEventFiring(false);
+
+                // Now unsuppress painting on the presshell, if we
+                // haven't done that yet.
+                RefPtr<PresShell> presShell = doc->GetPresShell();
+                if (presShell && !presShell->IsDestroying()) {
+                  presShell->UnsuppressPainting();
+
+                  if (!presShell->IsDestroying()) {
+                    presShell->LoadComplete();
+                  }
+                }
+              }
+            }
+          }
+        }
+        NotifyDoneWithOnload(parent);
+      }
+    }
+  }
+}
+
+void nsDocLoader::NotifyDoneWithOnload(nsDocLoader* aParent) {
+  if (aParent) {
+    // In-process parent:
+    aParent->ChildDoneWithOnload(this);
+  }
+  nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(this);
+  if (!docShell) {
+    return;
+  }
+  BrowsingContext* bc = nsDocShell::Cast(docShell)->GetBrowsingContext();
+  if (bc->IsContentSubframe() && !bc->GetParent()->IsInProcess()) {
+    if (BrowserChild* browserChild = BrowserChild::GetFrom(docShell)) {
+      mozilla::Unused << browserChild->SendMaybeFireEmbedderLoadEvents(
+          dom::EmbedderElementEventType::NoEvent);
+    }
+  }
+}
+
+void nsDocLoader::doStartDocumentLoad(void) {
+#if defined(DEBUG)
+  nsAutoCString buffer;
+
+  GetURIStringFromRequest(mDocumentRequest, buffer);
+  MOZ_LOG(
+      gDocLoaderLog, LogLevel::Debug,
+      ("DocLoader:%p: ++ Firing OnStateChange for start document load (...)."
+       "\tURI: %s \n",
+       this, buffer.get()));
+#endif /* DEBUG */
+
+  // Fire an OnStatus(...) notification STATE_START.  This indicates
+  // that the document represented by mDocumentRequest has started to
+  // load...
+  FireOnStateChange(this, mDocumentRequest,
+                    nsIWebProgressListener::STATE_START |
+                        nsIWebProgressListener::STATE_IS_DOCUMENT |
+                        nsIWebProgressListener::STATE_IS_REQUEST |
+                        nsIWebProgressListener::STATE_IS_WINDOW |
+                        nsIWebProgressListener::STATE_IS_NETWORK,
+                    NS_OK);
+}
+
+void nsDocLoader::doStartURLLoad(nsIRequest* request, int32_t aExtraFlags) {
+#if defined(DEBUG)
+  nsAutoCString buffer;
+
+  GetURIStringFromRequest(request, buffer);
+  MOZ_LOG(gDocLoaderLog, LogLevel::Debug,
+          ("DocLoader:%p: ++ Firing OnStateChange start url load (...)."
+           "\tURI: %s\n",
+           this, buffer.get()));
+#endif /* DEBUG */
+
+  FireOnStateChange(this, request,
+                    nsIWebProgressListener::STATE_START |
+                        nsIWebProgressListener::STATE_IS_REQUEST | aExtraFlags,
+                    NS_OK);
+}
+
+void nsDocLoader::doStopURLLoad(nsIRequest* request, nsresult aStatus) {
+#if defined(DEBUG)
+  nsAutoCString buffer;
+
+  GetURIStringFromRequest(request, buffer);
+  MOZ_LOG(gDocLoaderLog, LogLevel::Debug,
+          ("DocLoader:%p: ++ Firing OnStateChange for end url load (...)."
+           "\tURI: %s status=%" PRIx32 "\n",
+           this, buffer.get(), static_cast<uint32_t>(aStatus)));
+#endif /* DEBUG */
+
+  FireOnStateChange(this, request,
+                    nsIWebProgressListener::STATE_STOP |
+                        nsIWebProgressListener::STATE_IS_REQUEST,
+                    aStatus);
+
+  // Fire a status change message for the most recent unfinished
+  // request to make sure that the displayed status is not outdated.
+  if (!mStatusInfoList.isEmpty()) {
+    nsStatusInfo* statusInfo = mStatusInfoList.getFirst();
+    FireOnStatusChange(this, statusInfo->mRequest, statusInfo->mStatusCode,
+                       statusInfo->mStatusMessage.get());
+  }
+}
+
+void nsDocLoader::doStopDocumentLoad(nsIRequest* request, nsresult aStatus) {
+#if defined(DEBUG)
+  nsAutoCString buffer;
+
+  GetURIStringFromRequest(request, buffer);
+  MOZ_LOG(gDocLoaderLog, LogLevel::Debug,
+          ("DocLoader:%p: ++ Firing OnStateChange for end document load (...)."
+           "\tURI: %s Status=%" PRIx32 "\n",
+           this, buffer.get(), static_cast<uint32_t>(aStatus)));
+#endif /* DEBUG */
+
+  // Firing STATE_STOP|STATE_IS_DOCUMENT will fire onload handlers.
+  // Grab our parent chain before doing that so we can still dispatch
+  // STATE_STOP|STATE_IS_WINDW_STATE_IS_NETWORK to them all, even if
+  // the onload handlers rearrange the docshell tree.
+  WebProgressList list;
+  GatherAncestorWebProgresses(list);
+
+  //
+  // Fire an OnStateChange(...) notification indicating the the
+  // current document has finished loading...
+  //
+  int32_t flags = nsIWebProgressListener::STATE_STOP |
+                  nsIWebProgressListener::STATE_IS_DOCUMENT;
+  for (uint32_t i = 0; i < list.Length(); ++i) {
+    list[i]->DoFireOnStateChange(this, request, flags, aStatus);
+  }
+
+  //
+  // Fire a final OnStateChange(...) notification indicating the the
+  // current document has finished loading...
+  //
+  flags = nsIWebProgressListener::STATE_STOP |
+          nsIWebProgressListener::STATE_IS_WINDOW |
+          nsIWebProgressListener::STATE_IS_NETWORK;
+  for (uint32_t i = 0; i < list.Length(); ++i) {
+    list[i]->DoFireOnStateChange(this, request, flags, aStatus);
+  }
+}
+
+////////////////////////////////////////////////////////////////////////////////////
+// The following section contains support for nsIWebProgress and related stuff
+////////////////////////////////////////////////////////////////////////////////////
+
+NS_IMETHODIMP
+nsDocLoader::AddProgressListener(nsIWebProgressListener* aListener,
+                                 uint32_t aNotifyMask) {
+  if (mListenerInfoList.Contains(aListener)) {
+    // The listener is already registered!
+    return NS_ERROR_FAILURE;
+  }
+
+  nsWeakPtr listener = do_GetWeakReference(aListener);
+  if (!listener) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  mListenerInfoList.AppendElement(nsListenerInfo(listener, aNotifyMask));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsDocLoader::RemoveProgressListener(nsIWebProgressListener* aListener) {
+  return mListenerInfoList.RemoveElement(aListener) ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsDocLoader::GetBrowsingContextXPCOM(BrowsingContext** aResult) {
+  *aResult = nullptr;
+  return NS_OK;
+}
+
+BrowsingContext* nsDocLoader::GetBrowsingContext() { return nullptr; }
+
+NS_IMETHODIMP
+nsDocLoader::GetDOMWindow(mozIDOMWindowProxy** aResult) {
+  return CallGetInterface(this, aResult);
+}
+
+NS_IMETHODIMP
+nsDocLoader::GetIsTopLevel(bool* aResult) {
+  nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(this);
+  *aResult = docShell && docShell->GetBrowsingContext()->IsTop();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsDocLoader::GetIsLoadingDocument(bool* aIsLoadingDocument) {
+  *aIsLoadingDocument = mIsLoadingDocument;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsDocLoader::GetLoadType(uint32_t* aLoadType) {
+  *aLoadType = 0;
+
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+nsDocLoader::GetTarget(nsIEventTarget** aTarget) {
+  nsCOMPtr<mozIDOMWindowProxy> window;
+  nsresult rv = GetDOMWindow(getter_AddRefs(window));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(window);
+  NS_ENSURE_STATE(global);
+
+  nsCOMPtr<nsIEventTarget> target =
+      global->EventTargetFor(mozilla::TaskCategory::Other);
+  target.forget(aTarget);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsDocLoader::SetTarget(nsIEventTarget* aTarget) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+int64_t nsDocLoader::GetMaxTotalProgress() {
+  int64_t newMaxTotal = 0;
+
+  uint32_t count = mChildList.Length();
+  for (uint32_t i = 0; i < count; i++) {
+    int64_t individualProgress = 0;
+    nsIDocumentLoader* docloader = ChildAt(i);
+    if (docloader) {
+      // Cast is safe since all children are nsDocLoader too
+      individualProgress = ((nsDocLoader*)docloader)->GetMaxTotalProgress();
+    }
+    if (individualProgress < int64_t(0))  // if one of the elements doesn't know
+                                          // it's size then none of them do
+    {
+      newMaxTotal = int64_t(-1);
+      break;
+    } else
+      newMaxTotal += individualProgress;
+  }
+
+  int64_t progress = -1;
+  if (mMaxSelfProgress >= int64_t(0) && newMaxTotal >= int64_t(0))
+    progress = newMaxTotal + mMaxSelfProgress;
+
+  return progress;
+}
+
+////////////////////////////////////////////////////////////////////////////////////
+// The following section contains support for nsIProgressEventSink which is used
+// to pass progress and status between the actual request and the doc loader.
+// The doc loader then turns around and makes the right web progress calls based
+// on this information.
+////////////////////////////////////////////////////////////////////////////////////
+
+NS_IMETHODIMP nsDocLoader::OnProgress(nsIRequest* aRequest, int64_t aProgress,
+                                      int64_t aProgressMax) {
+  int64_t progressDelta = 0;
+
+  //
+  // Update the RequestInfo entry with the new progress data
+  //
+  if (nsRequestInfo* info = GetRequestInfo(aRequest)) {
+    // Update info->mCurrentProgress before we call FireOnStateChange,
+    // since that can make the "info" pointer invalid.
+    int64_t oldCurrentProgress = info->mCurrentProgress;
+    progressDelta = aProgress - oldCurrentProgress;
+    info->mCurrentProgress = aProgress;
+
+    // suppress sending STATE_TRANSFERRING if this is upload progress (see bug
+    // 240053)
+    if (!info->mUploading && (int64_t(0) == oldCurrentProgress) &&
+        (int64_t(0) == info->mMaxProgress)) {
+      //
+      // If we receive an OnProgress event from a toplevel channel that the URI
+      // Loader has not yet targeted, then we must suppress the event.  This is
+      // necessary to ensure that webprogresslisteners do not get confused when
+      // the channel is finally targeted.  See bug 257308.
+      //
+      nsLoadFlags lf = 0;
+      aRequest->GetLoadFlags(&lf);
+      if ((lf & nsIChannel::LOAD_DOCUMENT_URI) &&
+          !(lf & nsIChannel::LOAD_TARGETED)) {
+        MOZ_LOG(
+            gDocLoaderLog, LogLevel::Debug,
+            ("DocLoader:%p Ignoring OnProgress while load is not targeted\n",
+             this));
+        return NS_OK;
+      }
+
+      //
+      // This is the first progress notification for the entry.  If
+      // (aMaxProgress != -1) then the content-length of the data is known,
+      // so update mMaxSelfProgress...  Otherwise, set it to -1 to indicate
+      // that the content-length is no longer known.
+      //
+      if (aProgressMax != -1) {
+        mMaxSelfProgress += aProgressMax;
+        info->mMaxProgress = aProgressMax;
+      } else {
+        mMaxSelfProgress = int64_t(-1);
+        info->mMaxProgress = int64_t(-1);
+      }
+
+      // Send a STATE_TRANSFERRING notification for the request.
+      int32_t flags;
+
+      flags = nsIWebProgressListener::STATE_TRANSFERRING |
+              nsIWebProgressListener::STATE_IS_REQUEST;
+      //
+      // Move the WebProgress into the STATE_TRANSFERRING state if necessary...
+      //
+      if (mProgressStateFlags & nsIWebProgressListener::STATE_START) {
+        mProgressStateFlags = nsIWebProgressListener::STATE_TRANSFERRING;
+
+        // Send STATE_TRANSFERRING for the document too...
+        flags |= nsIWebProgressListener::STATE_IS_DOCUMENT;
+      }
+
+      FireOnStateChange(this, aRequest, flags, NS_OK);
+    }
+
+    // Update our overall current progress count.
+    mCurrentSelfProgress += progressDelta;
+  }
+  //
+  // The request is not part of the load group, so ignore its progress
+  // information...
+  //
+  else {
+#if defined(DEBUG)
+    nsAutoCString buffer;
+
+    GetURIStringFromRequest(aRequest, buffer);
+    MOZ_LOG(
+        gDocLoaderLog, LogLevel::Debug,
+        ("DocLoader:%p OOPS - No Request Info for: %s\n", this, buffer.get()));
+#endif /* DEBUG */
+
+    return NS_OK;
+  }
+
+  //
+  // Fire progress notifications out to any registered nsIWebProgressListeners
+  //
+  FireOnProgressChange(this, aRequest, aProgress, aProgressMax, progressDelta,
+                       mCurrentTotalProgress, mMaxTotalProgress);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsDocLoader::OnStatus(nsIRequest* aRequest, nsresult aStatus,
+                                    const char16_t* aStatusArg) {
+  //
+  // Fire progress notifications out to any registered nsIWebProgressListeners
+  //
+  if (aStatus != NS_OK) {
+    // Remember the current status for this request
+    nsRequestInfo* info;
+    info = GetRequestInfo(aRequest);
+    if (info) {
+      bool uploading = (aStatus == NS_NET_STATUS_WRITING ||
+                        aStatus == NS_NET_STATUS_SENDING_TO);
+      // If switching from uploading to downloading (or vice versa), then we
+      // need to reset our progress counts.  This is designed with HTTP form
+      // submission in mind, where an upload is performed followed by download
+      // of possibly several documents.
+      if (info->mUploading != uploading) {
+        mCurrentSelfProgress = mMaxSelfProgress = 0;
+        mCurrentTotalProgress = mMaxTotalProgress = 0;
+        mCompletedTotalProgress = 0;
+        info->mUploading = uploading;
+        info->mCurrentProgress = 0;
+        info->mMaxProgress = 0;
+      }
+    }
+
+    nsCOMPtr<nsIStringBundleService> sbs =
+        mozilla::components::StringBundle::Service();
+    if (!sbs) return NS_ERROR_FAILURE;
+    nsAutoString msg;
+    nsresult rv = sbs->FormatStatusMessage(aStatus, aStatusArg, msg);
+    if (NS_FAILED(rv)) return rv;
+
+    // Keep around the message. In case a request finishes, we need to make sure
+    // to send the status message of another request to our user to that we
+    // don't display, for example, "Transferring" messages for requests that are
+    // already done.
+    if (info) {
+      if (!info->mLastStatus) {
+        info->mLastStatus = MakeUnique<nsStatusInfo>(aRequest);
+      } else {
+        // We're going to move it to the front of the list, so remove
+        // it from wherever it is now.
+        info->mLastStatus->remove();
+      }
+      info->mLastStatus->mStatusMessage = msg;
+      info->mLastStatus->mStatusCode = aStatus;
+      // Put the info at the front of the list
+      mStatusInfoList.insertFront(info->mLastStatus.get());
+    }
+    FireOnStatusChange(this, aRequest, aStatus, msg.get());
+  }
+  return NS_OK;
+}
+
+void nsDocLoader::ClearInternalProgress() {
+  ClearRequestInfoHash();
+
+  mCurrentSelfProgress = mMaxSelfProgress = 0;
+  mCurrentTotalProgress = mMaxTotalProgress = 0;
+  mCompletedTotalProgress = 0;
+
+  mProgressStateFlags = nsIWebProgressListener::STATE_STOP;
+}
+
+/**
+ * |_code| is executed for every listener matching |_flag|
+ * |listener| should be used inside |_code| as the nsIWebProgressListener var.
+ */
+#define NOTIFY_LISTENERS(_flag, _code)                     \
+  PR_BEGIN_MACRO                                           \
+  nsCOMPtr<nsIWebProgressListener> listener;               \
+  ListenerArray::BackwardIterator iter(mListenerInfoList); \
+  while (iter.HasMore()) {                                 \
+    nsListenerInfo& info = iter.GetNext();                 \
+    if (!(info.mNotifyMask & (_flag))) {                   \
+      continue;                                            \
+    }                                                      \
+    listener = do_QueryReferent(info.mWeakListener);       \
+    if (!listener) {                                       \
+      iter.Remove();                                       \
+      continue;                                            \
+    }                                                      \
+    _code                                                  \
+  }                                                        \
+  mListenerInfoList.Compact();                             \
+  PR_END_MACRO
+
+void nsDocLoader::FireOnProgressChange(nsDocLoader* aLoadInitiator,
+                                       nsIRequest* request, int64_t aProgress,
+                                       int64_t aProgressMax,
+                                       int64_t aProgressDelta,
+                                       int64_t aTotalProgress,
+                                       int64_t aMaxTotalProgress) {
+  if (mIsLoadingDocument) {
+    mCurrentTotalProgress += aProgressDelta;
+    mMaxTotalProgress = GetMaxTotalProgress();
+
+    aTotalProgress = mCurrentTotalProgress;
+    aMaxTotalProgress = mMaxTotalProgress;
+  }
+
+#if defined(DEBUG)
+  nsAutoCString buffer;
+
+  GetURIStringFromRequest(request, buffer);
+  MOZ_LOG(gDocLoaderLog, LogLevel::Debug,
+          ("DocLoader:%p: Progress (%s): curSelf: %" PRId64 " maxSelf: %" PRId64
+           " curTotal: %" PRId64 " maxTotal %" PRId64 "\n",
+           this, buffer.get(), aProgress, aProgressMax, aTotalProgress,
+           aMaxTotalProgress));
+#endif /* DEBUG */
+
+  NOTIFY_LISTENERS(
+      nsIWebProgress::NOTIFY_PROGRESS,
+      // XXX truncates 64-bit to 32-bit
+      listener->OnProgressChange(aLoadInitiator, request, int32_t(aProgress),
+                                 int32_t(aProgressMax), int32_t(aTotalProgress),
+                                 int32_t(aMaxTotalProgress)););
+
+  // Pass the notification up to the parent...
+  if (mParent) {
+    mParent->FireOnProgressChange(aLoadInitiator, request, aProgress,
+                                  aProgressMax, aProgressDelta, aTotalProgress,
+                                  aMaxTotalProgress);
+  }
+}
+
+void nsDocLoader::GatherAncestorWebProgresses(WebProgressList& aList) {
+  for (nsDocLoader* loader = this; loader; loader = loader->mParent) {
+    aList.AppendElement(loader);
+  }
+}
+
+void nsDocLoader::FireOnStateChange(nsIWebProgress* aProgress,
+                                    nsIRequest* aRequest, int32_t aStateFlags,
+                                    nsresult aStatus) {
+  WebProgressList list;
+  GatherAncestorWebProgresses(list);
+  for (uint32_t i = 0; i < list.Length(); ++i) {
+    list[i]->DoFireOnStateChange(aProgress, aRequest, aStateFlags, aStatus);
+  }
+}
+
+void nsDocLoader::DoFireOnStateChange(nsIWebProgress* const aProgress,
+                                      nsIRequest* const aRequest,
+                                      int32_t& aStateFlags,
+                                      const nsresult aStatus) {
+  //
+  // Remove the STATE_IS_NETWORK bit if necessary.
+  //
+  // The rule is to remove this bit, if the notification has been passed
+  // up from a child WebProgress, and the current WebProgress is already
+  // active...
+  //
+  if (mIsLoadingDocument &&
+      (aStateFlags & nsIWebProgressListener::STATE_IS_NETWORK) &&
+      (this != aProgress)) {
+    aStateFlags &= ~nsIWebProgressListener::STATE_IS_NETWORK;
+  }
+
+  // Add the STATE_RESTORING bit if necessary.
+  if (mIsRestoringDocument)
+    aStateFlags |= nsIWebProgressListener::STATE_RESTORING;
+
+#if defined(DEBUG)
+  nsAutoCString buffer;
+
+  GetURIStringFromRequest(aRequest, buffer);
+  MOZ_LOG(gDocLoaderLog, LogLevel::Debug,
+          ("DocLoader:%p: Status (%s): code: %x\n", this, buffer.get(),
+           aStateFlags));
+#endif /* DEBUG */
+
+  NS_ASSERTION(aRequest,
+               "Firing OnStateChange(...) notification with a NULL request!");
+
+  NOTIFY_LISTENERS(
+      ((aStateFlags >> 16) & nsIWebProgress::NOTIFY_STATE_ALL),
+      listener->OnStateChange(aProgress, aRequest, aStateFlags, aStatus););
+}
+
+void nsDocLoader::FireOnLocationChange(nsIWebProgress* aWebProgress,
+                                       nsIRequest* aRequest, nsIURI* aUri,
+                                       uint32_t aFlags) {
+  NOTIFY_LISTENERS(
+      nsIWebProgress::NOTIFY_LOCATION,
+      MOZ_LOG(gDocLoaderLog, LogLevel::Debug,
+              ("DocLoader [%p] calling %p->OnLocationChange to %s %x", this,
+               listener.get(), aUri->GetSpecOrDefault().get(), aFlags));
+      listener->OnLocationChange(aWebProgress, aRequest, aUri, aFlags););
+
+  // Pass the notification up to the parent...
+  if (mParent) {
+    mParent->FireOnLocationChange(aWebProgress, aRequest, aUri, aFlags);
+  }
+}
+
+void nsDocLoader::FireOnStatusChange(nsIWebProgress* aWebProgress,
+                                     nsIRequest* aRequest, nsresult aStatus,
+                                     const char16_t* aMessage) {
+  NOTIFY_LISTENERS(
+      nsIWebProgress::NOTIFY_STATUS,
+      listener->OnStatusChange(aWebProgress, aRequest, aStatus, aMessage););
+
+  // Pass the notification up to the parent...
+  if (mParent) {
+    mParent->FireOnStatusChange(aWebProgress, aRequest, aStatus, aMessage);
+  }
+}
+
+bool nsDocLoader::RefreshAttempted(nsIWebProgress* aWebProgress, nsIURI* aURI,
+                                   uint32_t aDelay, bool aSameURI) {
+  /*
+   * Returns true if the refresh may proceed,
+   * false if the refresh should be blocked.
+   */
+  bool allowRefresh = true;
+
+  NOTIFY_LISTENERS(
+      nsIWebProgress::NOTIFY_REFRESH,
+      nsCOMPtr<nsIWebProgressListener2> listener2 =
+          do_QueryReferent(info.mWeakListener);
+      if (!listener2) continue;
+
+      bool listenerAllowedRefresh;
+      nsresult listenerRV = listener2->OnRefreshAttempted(
+          aWebProgress, aURI, aDelay, aSameURI, &listenerAllowedRefresh);
+      if (NS_FAILED(listenerRV)) continue;
+
+      allowRefresh = allowRefresh && listenerAllowedRefresh;);
+
+  // Pass the notification up to the parent...
+  if (mParent) {
+    allowRefresh = allowRefresh && mParent->RefreshAttempted(aWebProgress, aURI,
+                                                             aDelay, aSameURI);
+  }
+
+  return allowRefresh;
+}
+
+nsresult nsDocLoader::AddRequestInfo(nsIRequest* aRequest) {
+  if (!mRequestInfoHash.Add(aRequest, mozilla::fallible)) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  return NS_OK;
+}
+
+void nsDocLoader::RemoveRequestInfo(nsIRequest* aRequest) {
+  mRequestInfoHash.Remove(aRequest);
+}
+
+nsDocLoader::nsRequestInfo* nsDocLoader::GetRequestInfo(
+    nsIRequest* aRequest) const {
+  return static_cast<nsRequestInfo*>(mRequestInfoHash.Search(aRequest));
+}
+
+void nsDocLoader::ClearRequestInfoHash(void) { mRequestInfoHash.Clear(); }
+
+int64_t nsDocLoader::CalculateMaxProgress() {
+  int64_t max = mCompletedTotalProgress;
+  for (auto iter = mRequestInfoHash.Iter(); !iter.Done(); iter.Next()) {
+    auto info = static_cast<const nsRequestInfo*>(iter.Get());
+
+    if (info->mMaxProgress < info->mCurrentProgress) {
+      return int64_t(-1);
+    }
+    max += info->mMaxProgress;
+  }
+  return max;
+}
+
+NS_IMETHODIMP nsDocLoader::AsyncOnChannelRedirect(
+    nsIChannel* aOldChannel, nsIChannel* aNewChannel, uint32_t aFlags,
+    nsIAsyncVerifyRedirectCallback* cb) {
+  if (aOldChannel) {
+    nsLoadFlags loadFlags = 0;
+    int32_t stateFlags = nsIWebProgressListener::STATE_REDIRECTING |
+                         nsIWebProgressListener::STATE_IS_REQUEST;
+
+    aOldChannel->GetLoadFlags(&loadFlags);
+    // If the document channel is being redirected, then indicate that the
+    // document is being redirected in the notification...
+    if (loadFlags & nsIChannel::LOAD_DOCUMENT_URI) {
+      stateFlags |= nsIWebProgressListener::STATE_IS_DOCUMENT;
+
+#if defined(DEBUG)
+      // We only set mDocumentRequest in OnStartRequest(), but its possible
+      // to get a redirect before that for service worker interception.
+      if (mDocumentRequest) {
+        nsCOMPtr<nsIRequest> request(aOldChannel);
+        NS_ASSERTION(request == mDocumentRequest, "Wrong Document Channel");
+      }
+#endif /* DEBUG */
+    }
+
+    OnRedirectStateChange(aOldChannel, aNewChannel, aFlags, stateFlags);
+    FireOnStateChange(this, aOldChannel, stateFlags, NS_OK);
+  }
+
+  cb->OnRedirectVerifyCallback(NS_OK);
+  return NS_OK;
+}
+
+void nsDocLoader::OnSecurityChange(nsISupports* aContext, uint32_t aState) {
+  //
+  // Fire progress notifications out to any registered nsIWebProgressListeners.
+  //
+
+  nsCOMPtr<nsIRequest> request = do_QueryInterface(aContext);
+  nsIWebProgress* webProgress = static_cast<nsIWebProgress*>(this);
+
+  NOTIFY_LISTENERS(nsIWebProgress::NOTIFY_SECURITY,
+                   listener->OnSecurityChange(webProgress, request, aState););
+
+  // Pass the notification up to the parent...
+  if (mParent) {
+    mParent->OnSecurityChange(aContext, aState);
+  }
+}
+
+/*
+ * Implementation of nsISupportsPriority methods...
+ *
+ * The priority of the DocLoader _is_ the priority of its LoadGroup.
+ *
+ * XXX(darin): Once we start storing loadgroups in loadgroups, this code will
+ * go away.
+ */
+
+NS_IMETHODIMP nsDocLoader::GetPriority(int32_t* aPriority) {
+  nsCOMPtr<nsISupportsPriority> p = do_QueryInterface(mLoadGroup);
+  if (p) return p->GetPriority(aPriority);
+
+  *aPriority = 0;
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsDocLoader::SetPriority(int32_t aPriority) {
+  MOZ_LOG(gDocLoaderLog, LogLevel::Debug,
+          ("DocLoader:%p: SetPriority(%d) called\n", this, aPriority));
+
+  nsCOMPtr<nsISupportsPriority> p = do_QueryInterface(mLoadGroup);
+  if (p) p->SetPriority(aPriority);
+
+  NS_OBSERVER_ARRAY_NOTIFY_XPCOM_OBSERVERS(mChildList, SetPriority,
+                                           (aPriority));
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsDocLoader::AdjustPriority(int32_t aDelta) {
+  MOZ_LOG(gDocLoaderLog, LogLevel::Debug,
+          ("DocLoader:%p: AdjustPriority(%d) called\n", this, aDelta));
+
+  nsCOMPtr<nsISupportsPriority> p = do_QueryInterface(mLoadGroup);
+  if (p) p->AdjustPriority(aDelta);
+
+  NS_OBSERVER_ARRAY_NOTIFY_XPCOM_OBSERVERS(mChildList, AdjustPriority,
+                                           (aDelta));
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsDocLoader::GetDocumentRequest(nsIRequest** aRequest) {
+  NS_IF_ADDREF(*aRequest = mDocumentRequest);
+  return NS_OK;
+}
+
+#if 0
+void nsDocLoader::DumpChannelInfo()
+{
+  nsChannelInfo *info;
+  int32_t i, count;
+  int32_t current=0, max=0;
+
+
+  printf("==== DocLoader=%x\n", this);
+
+  count = mChannelInfoList.Count();
+  for(i=0; i<count; i++) {
+    info = (nsChannelInfo *)mChannelInfoList.ElementAt(i);
+
+#  if defined(DEBUG)
+    nsAutoCString buffer;
+    nsresult rv = NS_OK;
+    if (info->mURI) {
+      rv = info->mURI->GetSpec(buffer);
+    }
+
+    printf("  [%d] current=%d  max=%d [%s]\n", i,
+           info->mCurrentProgress,
+           info->mMaxProgress, buffer.get());
+#  endif /* DEBUG */
+
+    current += info->mCurrentProgress;
+    if (max >= 0) {
+      if (info->mMaxProgress < info->mCurrentProgress) {
+        max = -1;
+      } else {
+        max += info->mMaxProgress;
+      }
+    }
+  }
+
+  printf("\nCurrent=%d   Total=%d\n====\n", current, max);
+}
+#endif   /* 0 */