C++ do_GetInterface函数代码示例

NS_IMETHODIMP 
nsDOMWindowList::NamedItem(const nsAString& aName, nsIDOMWindow** aReturn)
{
  nsCOMPtr<nsIDocShellTreeItem> item;

  *aReturn = nsnull;

  nsCOMPtr<nsIWebNavigation> shellAsNav(do_QueryInterface(mDocShellNode));

  if (shellAsNav) {
    nsCOMPtr<nsIDOMDocument> domdoc;
    shellAsNav->GetDocument(getter_AddRefs(domdoc));

    nsCOMPtr<nsIDocument> doc(do_QueryInterface(domdoc));

    if (doc) {
      doc->FlushPendingNotifications(Flush_ContentAndNotify);
    }
  }

  // The above flush might cause mDocShellNode to be cleared, so we
  // need to check that it's still non-null here.

  if (mDocShellNode) {
    mDocShellNode->FindChildWithName(PromiseFlatString(aName).get(),
                                     false, false, nsnull,
                                     nsnull, getter_AddRefs(item));

    nsCOMPtr<nsIScriptGlobalObject> globalObject(do_GetInterface(item));
    if (globalObject) {
      CallQueryInterface(globalObject.get(), aReturn);
    }
  }

  return NS_OK;
}

/* readonly attribute nsIDOMElement documentFrameElement; */
NS_IMETHODIMP
nsXTFElementWrapper::GetDocumentFrameElement(nsIDOMElement * *aDocumentFrameElement)
{
  *aDocumentFrameElement = nsnull;
  
  nsIDocument *doc = GetCurrentDoc();
  if (!doc) {
    NS_WARNING("no document");
    return NS_OK;
  }
  nsCOMPtr<nsISupports> container = doc->GetContainer();
  if (!container) {
    NS_ERROR("no docshell");
    return NS_ERROR_FAILURE;
  }
  nsCOMPtr<nsPIDOMWindow> pidomwin = do_GetInterface(container);
  if (!pidomwin) {
    NS_ERROR("no nsPIDOMWindow interface on docshell");
    return NS_ERROR_FAILURE;
  }
  *aDocumentFrameElement = pidomwin->GetFrameElementInternal();
  NS_IF_ADDREF(*aDocumentFrameElement);
  return NS_OK;
}

NS_IMETHODIMP 
nsDOMWindowList::Item(PRUint32 aIndex, nsIDOMWindow** aReturn)
{
  nsCOMPtr<nsIDocShellTreeItem> item;

  *aReturn = nsnull;

  nsCOMPtr<nsIWebNavigation> shellAsNav = do_QueryInterface(mDocShellNode);

  if (shellAsNav) {
    nsCOMPtr<nsIDOMDocument> domdoc;
    shellAsNav->GetDocument(getter_AddRefs(domdoc));

    nsCOMPtr<nsIDocument> doc = do_QueryInterface(domdoc);

    if (doc) {
      doc->FlushPendingNotifications(Flush_ContentAndNotify);
    }
  }

  // The above flush might cause mDocShellNode to be cleared, so we
  // need to check that it's still non-null here.

  if (mDocShellNode) {
    mDocShellNode->GetChildAt(aIndex, getter_AddRefs(item));

    nsCOMPtr<nsIScriptGlobalObject> globalObject(do_GetInterface(item));
    NS_ASSERTION(!item || (item && globalObject),
                 "Couldn't get to the globalObject");

    if (globalObject) {
      CallQueryInterface(globalObject, aReturn);
    }
  }
  return NS_OK;
}

nsIntPoint
nsCoreUtils::GetScreenCoordsForWindow(nsINode *aNode)
{
  nsIntPoint coords(0, 0);
  nsCOMPtr<nsIDocShellTreeItem> treeItem(GetDocShellTreeItemFor(aNode));
  if (!treeItem)
    return coords;

  nsCOMPtr<nsIDocShellTreeItem> rootTreeItem;
  treeItem->GetRootTreeItem(getter_AddRefs(rootTreeItem));
  nsCOMPtr<nsIDOMDocument> domDoc = do_GetInterface(rootTreeItem);
  if (!domDoc)
    return coords;

  nsCOMPtr<nsIDOMWindow> window;
  domDoc->GetDefaultView(getter_AddRefs(window));
  nsCOMPtr<nsIDOMWindowInternal> windowInter(do_QueryInterface(window));
  if (!windowInter)
    return coords;

  windowInter->GetScreenX(&coords.x);
  windowInter->GetScreenY(&coords.y);
  return coords;
}

/*
 * Register a new top level window (created elsewhere)
 */
NS_IMETHODIMP
nsAppShellService::RegisterTopLevelWindow(nsIXULWindow* aWindow)
{
  // tell the window mediator about the new window
  nsCOMPtr<nsIWindowMediator> mediator
    ( do_GetService(NS_WINDOWMEDIATOR_CONTRACTID) );
  NS_ASSERTION(mediator, "Couldn't get window mediator.");

  if (mediator)
    mediator->RegisterWindow(aWindow);

  // tell the window watcher about the new window
  nsCOMPtr<nsPIWindowWatcher> wwatcher ( do_GetService(NS_WINDOWWATCHER_CONTRACTID) );
  NS_ASSERTION(wwatcher, "No windowwatcher?");
  if (wwatcher) {
    nsCOMPtr<nsIDocShell> docShell;
    aWindow->GetDocShell(getter_AddRefs(docShell));
    NS_ASSERTION(docShell, "Window has no docshell");
    if (docShell) {
      nsCOMPtr<nsIDOMWindow> domWindow(do_GetInterface(docShell));
      NS_ASSERTION(domWindow, "Couldn't get DOM window.");
      if (domWindow)
        wwatcher->AddWindow(domWindow, 0);
    }
  }

  // an ongoing attempt to quit is stopped by a newly opened window
  nsCOMPtr<nsIObserverService> obssvc =
    do_GetService("@mozilla.org/observer-service;1");
  NS_ASSERTION(obssvc, "Couldn't get observer service.");

  if (obssvc)
    obssvc->NotifyObservers(aWindow, "xul-window-registered", nsnull);

  return NS_OK;
}

int
EmbedWindow::SaveAs(char *fname, char *dirname)
{
	nsresult rv;

	nsCOMPtr<nsIWebBrowserPersist> persist(do_GetInterface(mWebBrowser, &rv));
	if (NS_FAILED(rv)) return rv;

  nsCOMPtr<nsILocalFile> file;
  NS_NewNativeLocalFile(nsDependentCString(fname), PR_TRUE, getter_AddRefs(file));

	/* the nsIWebBrowserPersist wants a parent directory where to download images and other items related to the document */
	/* we have to provide a directory, otherwise the current SaveDocument is marked as not finished and the next one is aborted */
	nsCOMPtr<nsILocalFile> parentDirAsLocal;
	rv = NS_NewNativeLocalFile(nsDependentCString( dirname ), PR_TRUE, getter_AddRefs(parentDirAsLocal));
	if (NS_FAILED(rv)) return rv;

	PRUint32 flags;
	persist->GetPersistFlags( &flags );
	if( !(flags & nsIWebBrowserPersist::PERSIST_FLAGS_REPLACE_EXISTING_FILES ) ) persist->SetPersistFlags( nsIWebBrowserPersist::PERSIST_FLAGS_REPLACE_EXISTING_FILES );

  persist->SaveDocument(nsnull, file, parentDirAsLocal, nsnull, 0, 0);
  return 0;
}

nsresult
nsDocShellEditorData::DetachFromWindow()
{
  NS_ASSERTION(mEditingSession,
               "Can't detach when we don't have a session to detach!");
  
  nsCOMPtr<nsIDOMWindow> domWindow = do_GetInterface(mDocShell);
  nsresult rv = mEditingSession->DetachFromWindow(domWindow);
  NS_ENSURE_SUCCESS(rv, rv);

  mIsDetached = true;
  mDetachedMakeEditable = mMakeEditable;
  mMakeEditable = false;

  nsCOMPtr<nsIDOMDocument> domDoc;
  domWindow->GetDocument(getter_AddRefs(domDoc));
  nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(domDoc);
  if (htmlDoc)
    mDetachedEditingState = htmlDoc->GetEditingState();

  mDocShell = nullptr;

  return NS_OK;
}

nsresult
nsPluginStreamListenerPeer::GetInterfaceGlobal(const nsIID& aIID, void** result)
{
  if (!mPluginInstance) {
    return NS_ERROR_FAILURE;
  }

  nsCOMPtr<nsIPluginInstanceOwner> owner;
  mPluginInstance->GetOwner(getter_AddRefs(owner));
  if (owner) {
    nsCOMPtr<nsIDocument> doc;
    nsresult rv = owner->GetDocument(getter_AddRefs(doc));
    if (NS_SUCCEEDED(rv) && doc) {
      nsPIDOMWindow *window = doc->GetWindow();
      if (window) {
        nsCOMPtr<nsIWebNavigation> webNav = do_GetInterface(window);
        nsCOMPtr<nsIInterfaceRequestor> ir = do_QueryInterface(webNav);
        return ir->GetInterface(aIID, result);
      }
    }
  }

  return NS_ERROR_FAILURE;
}

/* void viewCert (in nsIX509Cert cert); */
NS_IMETHODIMP 
nsNSSDialogs::ViewCert(nsIInterfaceRequestor *ctx, 
                       nsIX509Cert *cert)
{
  nsresult rv;

  nsCOMPtr<nsIPKIParamBlock> block =
           do_CreateInstance(NS_PKIPARAMBLOCK_CONTRACTID);
  if (!block)
    return NS_ERROR_FAILURE;

  rv = block->SetISupportAtIndex(1, cert);
  if (NS_FAILED(rv))
    return rv;

  // Get the parent window for the dialog
  nsCOMPtr<nsIDOMWindow> parent = do_GetInterface(ctx);

  rv = nsNSSDialogHelper::openDialog(parent,
                                     "chrome://pippki/content/certViewer.xul",
                                     block,
                                     false);
  return rv;
}

nsresult
nsEditingSession::ReattachToWindow(nsIDOMWindow* aWindow)
{
  NS_ENSURE_TRUE(mDoneSetup, NS_OK);

  NS_ASSERTION(mStateMaintainer, "mStateMaintainer should exist.");

  // Imitate nsEditorDocShell::MakeEditable() to reattach the
  // old editor ot the window.
  nsresult rv;

  nsIDocShell *docShell = GetDocShellFromWindow(aWindow);
  NS_ENSURE_TRUE(docShell, NS_ERROR_FAILURE);
  mDocShell = do_GetWeakReference(docShell);

  // Disable plugins.
  if (!mInteractive)
  {
    rv = DisableJSAndPlugins(aWindow);
    NS_ENSURE_SUCCESS(rv, rv);
  }

  // Tells embedder that startup is in progress.
  mEditorStatus = eEditorCreationInProgress;

  // Adds back web progress listener.
  rv = PrepareForEditing(aWindow);
  NS_ENSURE_SUCCESS(rv, rv);

  // Setup the command controllers again.
  rv = SetupEditorCommandController("@mozilla.org/editor/editingcontroller;1",
                                    aWindow,
                                    static_cast<nsIEditingSession*>(this),
                                    &mBaseCommandControllerId);
  NS_ENSURE_SUCCESS(rv, rv);

  rv = SetupEditorCommandController("@mozilla.org/editor/editordocstatecontroller;1",
                                    aWindow,
                                    static_cast<nsIEditingSession*>(this),
                                    &mDocStateControllerId);
  NS_ENSURE_SUCCESS(rv, rv);

  if (mStateMaintainer)
    mStateMaintainer->Init(aWindow);

  // Get editor
  nsCOMPtr<nsIEditor> editor;
  rv = GetEditorForWindow(aWindow, getter_AddRefs(editor));
  NS_ENSURE_TRUE(editor, NS_ERROR_FAILURE);

  if (!mInteractive)
  {
    // Disable animation of images in this document:
    nsCOMPtr<nsIDOMWindowUtils> utils(do_GetInterface(aWindow));
    NS_ENSURE_TRUE(utils, NS_ERROR_FAILURE);

    rv = utils->GetImageAnimationMode(&mImageAnimationMode);
    NS_ENSURE_SUCCESS(rv, rv);
    utils->SetImageAnimationMode(imgIContainer::kDontAnimMode);
  }

  // The third controller takes an nsIEditor as the context
  rv = SetupEditorCommandController("@mozilla.org/editor/htmleditorcontroller;1",
                                    aWindow, editor,
                                    &mHTMLCommandControllerId);
  NS_ENSURE_SUCCESS(rv, rv);

  // Set context on all controllers to be the editor
  rv = SetEditorOnControllers(aWindow, editor);
  NS_ENSURE_SUCCESS(rv, rv);

#ifdef DEBUG
  {
    bool isEditable;
    rv = WindowIsEditable(aWindow, &isEditable);
    NS_ENSURE_SUCCESS(rv, rv);
    NS_ASSERTION(isEditable, "Window is not editable after reattaching editor.");
  }
#endif // DEBUG

  return NS_OK;
}

// This is called when the channel is redirected.
NS_IMETHODIMP
FetchDriver::AsyncOnChannelRedirect(nsIChannel* aOldChannel,
                                    nsIChannel* aNewChannel,
                                    uint32_t aFlags,
                                    nsIAsyncVerifyRedirectCallback *aCallback)
{
  NS_PRECONDITION(aNewChannel, "Redirect without a channel?");

  nsresult rv;

  // HTTP Fetch step 5, "redirect status", step 1
  if (NS_WARN_IF(mRequest->GetRedirectMode() == RequestRedirect::Error)) {
    aOldChannel->Cancel(NS_BINDING_FAILED);
    return NS_BINDING_FAILED;
  }

  // HTTP Fetch step 5, "redirect status", steps 2 through 6 are automatically
  // handled by necko before calling AsyncOnChannelRedirect() with the new
  // nsIChannel.

  // HTTP Fetch step 5, "redirect status", steps 7 and 8 enforcing a redirect
  // count are done by Necko.  The pref used is "network.http.redirection-limit"
  // which is set to 20 by default.

  // HTTP Fetch Step 9, "redirect status". We only unset this for spec
  // compatibility. Any actions we take on mRequest here do not affect what the
  //channel does.
  mRequest->UnsetSameOriginDataURL();

  // HTTP Fetch step 5, "redirect status", step 10 requires us to halt the
  // redirect, but successfully return an opaqueredirect Response to the
  // initiating Fetch.
  if (mRequest->GetRedirectMode() == RequestRedirect::Manual) {
    // Ideally we would simply not cancel the old channel and allow it to
    // be processed as normal.  Unfortunately this is quite fragile and
    // other redirect handlers can easily break it for certain use cases.
    //
    // For example, nsCORSListenerProxy cancels vetoed redirect channels.
    // The HTTP cache will also error on vetoed redirects when the
    // redirect has been previously cached.
    //
    // Therefore simulate the completion of the channel to produce the
    // opaqueredirect Response and then cancel the original channel.  This
    // will result in OnStartRequest() getting called twice, but the second
    // time will be with an error response (from the Cancel) which will
    // be ignored.
    mRequest->SetResponseTainting(InternalRequest::RESPONSETAINT_OPAQUEREDIRECT);
    unused << OnStartRequest(aOldChannel, nullptr);
    unused << OnStopRequest(aOldChannel, nullptr, NS_OK);

    aOldChannel->Cancel(NS_BINDING_FAILED);

    return NS_BINDING_FAILED;
  }

  // The following steps are from HTTP Fetch step 5, "redirect status", step 11
  // which requires the RequestRedirect to be "follow".
  MOZ_ASSERT(mRequest->GetRedirectMode() == RequestRedirect::Follow);

  // HTTP Fetch step 5, "redirect status", steps 11.1 and 11.2 block redirecting
  // to a URL with credentials in CORS mode.  This is implemented in
  // nsCORSListenerProxy.

  mRedirectCallback = aCallback;
  mOldRedirectChannel = aOldChannel;
  mNewRedirectChannel = aNewChannel;

  nsCOMPtr<nsIChannelEventSink> outer =
    do_GetInterface(mNotificationCallbacks);
  if (outer) {
    // The callee is supposed to call OnRedirectVerifyCallback() on success,
    // and nobody has to call it on failure, so we can just return after this
    // block.
    rv = outer->AsyncOnChannelRedirect(aOldChannel, aNewChannel, aFlags, this);
    if (NS_FAILED(rv)) {
      aOldChannel->Cancel(rv);
      mRedirectCallback = nullptr;
      mOldRedirectChannel = nullptr;
      mNewRedirectChannel = nullptr;
    }
    return rv;
  }

  (void) OnRedirectVerifyCallback(NS_OK);
  return NS_OK;
}

/* boolean findNext (); */
NS_IMETHODIMP nsWebBrowserFind::FindNext(bool *outDidFind)
{
    NS_ENSURE_ARG_POINTER(outDidFind);
    *outDidFind = false;

    NS_ENSURE_TRUE(CanFindNext(), NS_ERROR_NOT_INITIALIZED);

    nsresult rv = NS_OK;
    nsCOMPtr<nsIDOMWindow> searchFrame = do_QueryReferent(mCurrentSearchFrame);
    NS_ENSURE_TRUE(searchFrame, NS_ERROR_NOT_INITIALIZED);

    nsCOMPtr<nsIDOMWindow> rootFrame = do_QueryReferent(mRootSearchFrame);
    NS_ENSURE_TRUE(rootFrame, NS_ERROR_NOT_INITIALIZED);
    
    // first, if there's a "cmd_findagain" observer around, check to see if it
    // wants to perform the find again command . If it performs the find again
    // it will return true, in which case we exit ::FindNext() early.
    // Otherwise, nsWebBrowserFind needs to perform the find again command itself
    // this is used by nsTypeAheadFind, which controls find again when it was
    // the last executed find in the current window.
    nsCOMPtr<nsIObserverService> observerSvc =
      mozilla::services::GetObserverService();
    if (observerSvc) {
        nsCOMPtr<nsISupportsInterfacePointer> windowSupportsData = 
          do_CreateInstance(NS_SUPPORTS_INTERFACE_POINTER_CONTRACTID, &rv);
        NS_ENSURE_SUCCESS(rv, rv);
        nsCOMPtr<nsISupports> searchWindowSupports =
          do_QueryInterface(rootFrame);
        windowSupportsData->SetData(searchWindowSupports);
        NS_NAMED_LITERAL_STRING(dnStr, "down");
        NS_NAMED_LITERAL_STRING(upStr, "up");
        observerSvc->NotifyObservers(windowSupportsData, 
                                     "nsWebBrowserFind_FindAgain", 
                                     mFindBackwards? upStr.get(): dnStr.get());
        windowSupportsData->GetData(getter_AddRefs(searchWindowSupports));
        // findnext performed if search window data cleared out
        *outDidFind = searchWindowSupports == nullptr;
        if (*outDidFind)
            return NS_OK;
    }

    // next, look in the current frame. If found, return.

    // Beware! This may flush notifications via synchronous
    // ScrollSelectionIntoView.
    rv = SearchInFrame(searchFrame, false, outDidFind);
    if (NS_FAILED(rv)) return rv;
    if (*outDidFind)
        return OnFind(searchFrame);     // we are done

    // if we are not searching other frames, return
    if (!mSearchSubFrames && !mSearchParentFrames)
        return NS_OK;

    nsIDocShell *rootDocShell = GetDocShellFromWindow(rootFrame);
    if (!rootDocShell) return NS_ERROR_FAILURE;
    
    int32_t enumDirection;
    if (mFindBackwards)
        enumDirection = nsIDocShell::ENUMERATE_BACKWARDS;
    else
        enumDirection = nsIDocShell::ENUMERATE_FORWARDS;
        
    nsCOMPtr<nsISimpleEnumerator> docShellEnumerator;
    rv = rootDocShell->GetDocShellEnumerator(nsIDocShellTreeItem::typeAll,
            enumDirection, getter_AddRefs(docShellEnumerator));    
    if (NS_FAILED(rv)) return rv;
        
    // remember where we started
    nsCOMPtr<nsIDocShellTreeItem> startingItem =
        do_QueryInterface(GetDocShellFromWindow(searchFrame), &rv);
    if (NS_FAILED(rv)) return rv;

    nsCOMPtr<nsIDocShellTreeItem> curItem;

    // XXX We should avoid searching in frameset documents here.
    // We also need to honour mSearchSubFrames and mSearchParentFrames.
    bool hasMore, doFind = false;
    while (NS_SUCCEEDED(docShellEnumerator->HasMoreElements(&hasMore)) && hasMore)
    {
        nsCOMPtr<nsISupports> curSupports;
        rv = docShellEnumerator->GetNext(getter_AddRefs(curSupports));
        if (NS_FAILED(rv)) break;
        curItem = do_QueryInterface(curSupports, &rv);
        if (NS_FAILED(rv)) break;

        if (doFind)
        {
            searchFrame = do_GetInterface(curItem, &rv);
            if (NS_FAILED(rv)) break;

            OnStartSearchFrame(searchFrame);

            // Beware! This may flush notifications via synchronous
            // ScrollSelectionIntoView.
            rv = SearchInFrame(searchFrame, false, outDidFind);
            if (NS_FAILED(rv)) return rv;
            if (*outDidFind)
                return OnFind(searchFrame);     // we are done
//.........这里部分代码省略.........

//.........这里部分代码省略.........
            {
                ATLTRACE(_T(", "));
            }
        }
        ATLTRACE(_T(");\n"));
    }
#endif
    m_spEventSinkTypeInfo->ReleaseFuncDesc(pFuncDesc);
    pFuncDesc = NULL;

    nsCOMPtr<nsIDOMElement> element;
    NPN_GetValue(mPlugin->pPluginInstance, NPNVDOMElement, 
        static_cast<nsIDOMElement **>(getter_AddRefs(element)));
    if (!element)
    {
        NS_ERROR("can't get the object element");
        return S_OK;
    }
    nsAutoString id;
    if (NS_FAILED(element->GetAttribute(NS_LITERAL_STRING("id"), id)) ||
        id.IsEmpty())
    {
        // Object has no name so it can't fire events
        return S_OK;
    }

    nsDependentString eventName(bstrName.m_str);

    // Fire the script event handler...
    nsCOMPtr<nsIDOMWindow> window;
    NPN_GetValue(mPlugin->pPluginInstance, NPNVDOMWindow, 
        static_cast<nsIDOMWindow **>(getter_AddRefs(window)));
    
    nsCOMPtr<nsIScriptEventManager> eventManager(do_GetInterface(window));
    if (!eventManager) return S_OK;

    nsCOMPtr<nsISupports> handler;

    eventManager->FindEventHandler(id, eventName, pDispParams->cArgs, getter_AddRefs(handler));
    if (!handler)
    {
        return S_OK;
    }

    // Create a list of arguments to pass along
    //
    // This array is created on the stack if the number of arguments
    // less than kMaxArgsOnStack.  Otherwise, the array is heap
    // allocated.
    //
    const int kMaxArgsOnStack = 10;

    PRUint32 argc = pDispParams->cArgs;
    jsval *args = nsnull;
    jsval stackArgs[kMaxArgsOnStack];

    // Heap allocate the jsval array if it is too big to fit on
    // the stack (ie. more than kMaxArgsOnStack arguments)
    if (argc > kMaxArgsOnStack)
    {
        args = new jsval[argc];
        if (!args) return S_OK;
    }
    else if (argc)
    {
        // Use the jsval array on the stack...

// Override a web page
NS_IMETHODIMP
nsParentalControlsServiceWin::RequestURIOverrides(nsIArray *aTargets, nsIInterfaceRequestor *aWindowContext, bool *_retval)
{
  *_retval = false;

  if (!mEnabled)
    return NS_ERROR_NOT_AVAILABLE;

  NS_ENSURE_ARG_POINTER(aTargets);

  uint32_t arrayLength = 0;
  aTargets->GetLength(&arrayLength);
  if (!arrayLength)
    return NS_ERROR_INVALID_ARG;

  if (arrayLength == 1) {
    nsCOMPtr<nsIURI> uri = do_QueryElementAt(aTargets, 0);
    if (!uri)
      return NS_ERROR_INVALID_ARG;
    return RequestURIOverride(uri, aWindowContext, _retval);
  }

  HWND hWnd = nullptr;
  // If we have a native window, use its handle instead
  nsCOMPtr<nsIWidget> widget(do_GetInterface(aWindowContext));
  if (widget)
    hWnd = (HWND)widget->GetNativeData(NS_NATIVE_WINDOW);
  if (hWnd == nullptr)
    hWnd = GetDesktopWindow();

  // The first entry should be the root uri
  nsAutoCString rootSpec;
  nsCOMPtr<nsIURI> rootURI = do_QueryElementAt(aTargets, 0);
  if (!rootURI)
    return NS_ERROR_INVALID_ARG;
  
  rootURI->GetSpec(rootSpec);
  if (rootSpec.IsEmpty())
    return NS_ERROR_INVALID_ARG;

  // Allocate an array of sub uri
  int32_t count = arrayLength - 1;
  nsAutoArrayPtr<LPCWSTR> arrUrls(new LPCWSTR[count]);
  if (!arrUrls)
    return NS_ERROR_OUT_OF_MEMORY;

  uint32_t uriIdx = 0, idx;
  for (idx = 1; idx < arrayLength; idx++)
  {
    nsCOMPtr<nsIURI> uri = do_QueryElementAt(aTargets, idx);
    if (!uri)
      continue;

    nsAutoCString subURI;
    if (NS_FAILED(uri->GetSpec(subURI)))
      continue;

    arrUrls[uriIdx] = (LPCWSTR)UTF8ToNewUnicode(subURI); // allocation
    if (!arrUrls[uriIdx])
      continue;

    uriIdx++;
  }

  if (!uriIdx)
    return NS_ERROR_INVALID_ARG;

  BOOL ret; 
  nsRefPtr<IWPCWebSettings> wpcws;
  if (SUCCEEDED(mPC->GetWebSettings(NULL, getter_AddRefs(wpcws)))) {
    wpcws->RequestURLOverride(hWnd, NS_ConvertUTF8toUTF16(rootSpec).get(),
                             uriIdx, (LPCWSTR*)arrUrls.get(), &ret);
   *_retval = ret;
  }

  // Free up the allocated strings in our array
  for (idx = 0; idx < uriIdx; idx++)
    NS_Free((void*)arrUrls[idx]);

  return NS_OK;
}

LoadInfo::LoadInfo(nsIPrincipal* aLoadingPrincipal,
                   nsIPrincipal* aTriggeringPrincipal,
                   nsINode* aLoadingContext,
                   nsSecurityFlags aSecurityFlags,
                   nsContentPolicyType aContentPolicyType)
  : mLoadingPrincipal(aLoadingContext ?
                        aLoadingContext->NodePrincipal() : aLoadingPrincipal)
  , mTriggeringPrincipal(aTriggeringPrincipal ?
                           aTriggeringPrincipal : mLoadingPrincipal.get())
  , mLoadingContext(do_GetWeakReference(aLoadingContext))
  , mSecurityFlags(aSecurityFlags)
  , mInternalContentPolicyType(aContentPolicyType)
  , mTainting(LoadTainting::Basic)
  , mUpgradeInsecureRequests(false)
  , mInnerWindowID(0)
  , mOuterWindowID(0)
  , mParentOuterWindowID(0)
  , mEnforceSecurity(false)
  , mInitialSecurityCheckDone(false)
  , mIsThirdPartyContext(true)
  , mForcePreflight(false)
  , mIsPreflight(false)
{
  MOZ_ASSERT(mLoadingPrincipal);
  MOZ_ASSERT(mTriggeringPrincipal);

  // if consumers pass both, aLoadingContext and aLoadingPrincipal
  // then the loadingPrincipal must be the same as the node's principal
  MOZ_ASSERT(!aLoadingContext || !aLoadingPrincipal ||
             aLoadingContext->NodePrincipal() == aLoadingPrincipal);

  // if the load is sandboxed, we can not also inherit the principal
  if (mSecurityFlags & nsILoadInfo::SEC_SANDBOXED) {
    mSecurityFlags ^= nsILoadInfo::SEC_FORCE_INHERIT_PRINCIPAL;
  }

  if (aLoadingContext) {
    nsCOMPtr<nsPIDOMWindow> outerWindow;

    // When the element being loaded is a frame, we choose the frame's window
    // for the window ID and the frame element's window as the parent
    // window. This is the behavior that Chrome exposes to add-ons.
    nsCOMPtr<nsIFrameLoaderOwner> frameLoaderOwner = do_QueryInterface(aLoadingContext);
    if (frameLoaderOwner) {
      nsCOMPtr<nsIFrameLoader> fl = frameLoaderOwner->GetFrameLoader();
      nsCOMPtr<nsIDocShell> docShell;
      if (fl && NS_SUCCEEDED(fl->GetDocShell(getter_AddRefs(docShell))) && docShell) {
        outerWindow = do_GetInterface(docShell);
      }
    } else {
      outerWindow = aLoadingContext->OwnerDoc()->GetWindow();
    }

    if (outerWindow) {
      nsCOMPtr<nsPIDOMWindow> inner = outerWindow->GetCurrentInnerWindow();
      mInnerWindowID = inner ? inner->WindowID() : 0;
      mOuterWindowID = outerWindow->WindowID();

      nsCOMPtr<nsPIDOMWindow> parent = outerWindow->GetScriptableParent();
      mParentOuterWindowID = parent->WindowID();

      ComputeIsThirdPartyContext(outerWindow);
    }

    // if the document forces all requests to be upgraded from http to https, then
    // we should do that for all requests. If it only forces preloads to be upgraded
    // then we should enforce upgrade insecure requests only for preloads.
    mUpgradeInsecureRequests =
      aLoadingContext->OwnerDoc()->GetUpgradeInsecureRequests(false) ||
      (nsContentUtils::IsPreloadType(mInternalContentPolicyType) &&
       aLoadingContext->OwnerDoc()->GetUpgradeInsecureRequests(true));
  }

  const PrincipalOriginAttributes attrs = BasePrincipal::Cast(mLoadingPrincipal)->OriginAttributesRef();
  mOriginAttributes.InheritFromDocToNecko(attrs);
}