gecko-dev/xpfe/appshell/nsContentTreeOwner.cpp

/* -*- Mode: C++; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: set ts=2 sw=2 et tw=80:
 *
 * 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/. */

// Local Includes
#include "nsContentTreeOwner.h"
#include "AppWindow.h"

// Helper Classes
#include "nsAutoPtr.h"

// Interfaces needed to be included
#include "nsIDOMWindow.h"
#include "nsIDOMChromeWindow.h"
#include "nsIBrowserDOMWindow.h"
#include "nsIEmbeddingSiteWindow.h"
#include "nsIPrompt.h"
#include "nsIAuthPrompt.h"
#include "nsIXULBrowserWindow.h"
#include "nsIPrincipal.h"
#include "nsIURIFixup.h"
#include "nsIWebNavigation.h"
#include "nsDocShellCID.h"
#include "nsIExternalURLHandlerService.h"
#include "nsIMIMEInfo.h"
#include "nsIWidget.h"
#include "nsWindowWatcher.h"
#include "mozilla/BrowserElementParent.h"
#include "mozilla/Components.h"
#include "mozilla/NullPrincipal.h"
#include "nsDocShell.h"
#include "nsDocShellLoadState.h"

#include "nsIScriptObjectPrincipal.h"
#include "nsIURI.h"
#include "mozilla/dom/Document.h"
#if defined(XP_MACOSX)
#  include "nsThreadUtils.h"
#endif

#include "mozilla/Preferences.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/ScriptSettings.h"

using namespace mozilla;

//*****************************************************************************
//*** nsSiteWindow declaration
//*****************************************************************************

class nsSiteWindow : public nsIEmbeddingSiteWindow {
  // nsSiteWindow shares a lifetime with nsContentTreeOwner, and proxies it's
  // AddRef and Release calls to said object.
  // When nsContentTreeOwner is destroyed, nsSiteWindow will be destroyed as
  // well. nsContentTreeOwner is a friend class of nsSiteWindow such that it can
  // call nsSiteWindow's destructor, which is private, as public destructors on
  // reference counted classes are generally unsafe.
  friend class nsContentTreeOwner;

 public:
  explicit nsSiteWindow(nsContentTreeOwner* aAggregator);

  NS_DECL_ISUPPORTS_INHERITED
  NS_DECL_NSIEMBEDDINGSITEWINDOW

 private:
  virtual ~nsSiteWindow();
  nsContentTreeOwner* mAggregator;
};

//*****************************************************************************
//***    nsContentTreeOwner: Object Management
//*****************************************************************************

nsContentTreeOwner::nsContentTreeOwner(bool fPrimary)
    : mAppWindow(nullptr), mPrimary(fPrimary) {
  // note if this fails, QI on nsIEmbeddingSiteWindow(2) will simply fail
  mSiteWindow = new nsSiteWindow(this);
}

nsContentTreeOwner::~nsContentTreeOwner() { delete mSiteWindow; }

//*****************************************************************************
// nsContentTreeOwner::nsISupports
//*****************************************************************************

NS_IMPL_ADDREF(nsContentTreeOwner)
NS_IMPL_RELEASE(nsContentTreeOwner)

NS_INTERFACE_MAP_BEGIN(nsContentTreeOwner)
  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDocShellTreeOwner)
  NS_INTERFACE_MAP_ENTRY(nsIDocShellTreeOwner)
  NS_INTERFACE_MAP_ENTRY(nsIBaseWindow)
  NS_INTERFACE_MAP_ENTRY(nsIWebBrowserChrome)
  NS_INTERFACE_MAP_ENTRY(nsIWebBrowserChrome3)
  NS_INTERFACE_MAP_ENTRY(nsIInterfaceRequestor)
  NS_INTERFACE_MAP_ENTRY(nsIWindowProvider)
  // NOTE: This is using aggregation because there are some properties and
  // method on nsIBaseWindow (which we implement) and on
  // nsIEmbeddingSiteWindow (which we also implement) that have the same name.
  // And it just so happens that we want different behavior for these methods
  // and properties depending on the interface through which they're called
  // (SetFocus() is a good example here).  If it were not for that, we could
  // ditch the aggregation and just deal with not being able to use NS_DECL_*
  // macros for this stuff....
  NS_INTERFACE_MAP_ENTRY_AGGREGATED(nsIEmbeddingSiteWindow, mSiteWindow)
NS_INTERFACE_MAP_END

//*****************************************************************************
// nsContentTreeOwner::nsIInterfaceRequestor
//*****************************************************************************

NS_IMETHODIMP nsContentTreeOwner::GetInterface(const nsIID& aIID,
                                               void** aSink) {
  NS_ENSURE_ARG_POINTER(aSink);
  *aSink = 0;

  if (aIID.Equals(NS_GET_IID(nsIPrompt))) {
    NS_ENSURE_STATE(mAppWindow);
    return mAppWindow->GetInterface(aIID, aSink);
  }
  if (aIID.Equals(NS_GET_IID(nsIAuthPrompt))) {
    NS_ENSURE_STATE(mAppWindow);
    return mAppWindow->GetInterface(aIID, aSink);
  }
  if (aIID.Equals(NS_GET_IID(nsIDocShellTreeItem))) {
    NS_ENSURE_STATE(mAppWindow);
    nsCOMPtr<nsIDocShell> shell;
    mAppWindow->GetDocShell(getter_AddRefs(shell));
    if (shell) return shell->QueryInterface(aIID, aSink);
    return NS_ERROR_FAILURE;
  }

  if (aIID.Equals(NS_GET_IID(nsIDOMWindow)) ||
      aIID.Equals(NS_GET_IID(nsPIDOMWindowOuter))) {
    NS_ENSURE_STATE(mAppWindow);
    nsCOMPtr<nsIDocShellTreeItem> shell;
    mAppWindow->GetPrimaryContentShell(getter_AddRefs(shell));
    if (shell) {
      nsCOMPtr<nsIInterfaceRequestor> thing(do_QueryInterface(shell));
      if (thing) return thing->GetInterface(aIID, aSink);
    }
    return NS_ERROR_FAILURE;
  }

  if (aIID.Equals(NS_GET_IID(nsIAppWindow))) {
    NS_ENSURE_STATE(mAppWindow);
    return mAppWindow->QueryInterface(aIID, aSink);
  }

  return QueryInterface(aIID, aSink);
}

//*****************************************************************************
// nsContentTreeOwner::nsIDocShellTreeOwner
//*****************************************************************************

NS_IMETHODIMP
nsContentTreeOwner::ContentShellAdded(nsIDocShellTreeItem* aContentShell,
                                      bool aPrimary) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->ContentShellAdded(aContentShell, aPrimary);
}

NS_IMETHODIMP
nsContentTreeOwner::ContentShellRemoved(nsIDocShellTreeItem* aContentShell) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->ContentShellRemoved(aContentShell);
}

NS_IMETHODIMP
nsContentTreeOwner::GetPrimaryContentShell(nsIDocShellTreeItem** aShell) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->GetPrimaryContentShell(aShell);
}

NS_IMETHODIMP
nsContentTreeOwner::RemoteTabAdded(nsIRemoteTab* aTab, bool aPrimary) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->RemoteTabAdded(aTab, aPrimary);
}

NS_IMETHODIMP
nsContentTreeOwner::RemoteTabRemoved(nsIRemoteTab* aTab) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->RemoteTabRemoved(aTab);
}

NS_IMETHODIMP
nsContentTreeOwner::GetPrimaryRemoteTab(nsIRemoteTab** aTab) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->GetPrimaryRemoteTab(aTab);
}

NS_IMETHODIMP
nsContentTreeOwner::GetPrimaryContentSize(int32_t* aWidth, int32_t* aHeight) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->GetPrimaryContentSize(aWidth, aHeight);
}

NS_IMETHODIMP
nsContentTreeOwner::SetPrimaryContentSize(int32_t aWidth, int32_t aHeight) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->SetPrimaryContentSize(aWidth, aHeight);
}

NS_IMETHODIMP
nsContentTreeOwner::GetRootShellSize(int32_t* aWidth, int32_t* aHeight) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->GetRootShellSize(aWidth, aHeight);
}

NS_IMETHODIMP
nsContentTreeOwner::SetRootShellSize(int32_t aWidth, int32_t aHeight) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->SetRootShellSize(aWidth, aHeight);
}

NS_IMETHODIMP nsContentTreeOwner::SizeShellTo(nsIDocShellTreeItem* aShellItem,
                                              int32_t aCX, int32_t aCY) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->SizeShellTo(aShellItem, aCX, aCY);
}

NS_IMETHODIMP
nsContentTreeOwner::SetPersistence(bool aPersistPosition, bool aPersistSize,
                                   bool aPersistSizeMode) {
  NS_ENSURE_STATE(mAppWindow);
  nsCOMPtr<dom::Element> docShellElement = mAppWindow->GetWindowDOMElement();
  if (!docShellElement) return NS_ERROR_FAILURE;

  nsAutoString persistString;
  docShellElement->GetAttribute(NS_LITERAL_STRING("persist"), persistString);

  bool saveString = false;
  int32_t index;

  // Set X
  index = persistString.Find("screenX");
  if (!aPersistPosition && index >= 0) {
    persistString.Cut(index, 7);
    saveString = true;
  } else if (aPersistPosition && index < 0) {
    persistString.AppendLiteral(" screenX");
    saveString = true;
  }
  // Set Y
  index = persistString.Find("screenY");
  if (!aPersistPosition && index >= 0) {
    persistString.Cut(index, 7);
    saveString = true;
  } else if (aPersistPosition && index < 0) {
    persistString.AppendLiteral(" screenY");
    saveString = true;
  }
  // Set CX
  index = persistString.Find("width");
  if (!aPersistSize && index >= 0) {
    persistString.Cut(index, 5);
    saveString = true;
  } else if (aPersistSize && index < 0) {
    persistString.AppendLiteral(" width");
    saveString = true;
  }
  // Set CY
  index = persistString.Find("height");
  if (!aPersistSize && index >= 0) {
    persistString.Cut(index, 6);
    saveString = true;
  } else if (aPersistSize && index < 0) {
    persistString.AppendLiteral(" height");
    saveString = true;
  }
  // Set SizeMode
  index = persistString.Find("sizemode");
  if (!aPersistSizeMode && (index >= 0)) {
    persistString.Cut(index, 8);
    saveString = true;
  } else if (aPersistSizeMode && (index < 0)) {
    persistString.AppendLiteral(" sizemode");
    saveString = true;
  }

  ErrorResult rv;
  if (saveString) {
    docShellElement->SetAttribute(NS_LITERAL_STRING("persist"), persistString,
                                  rv);
  }

  return NS_OK;
}

NS_IMETHODIMP
nsContentTreeOwner::GetPersistence(bool* aPersistPosition, bool* aPersistSize,
                                   bool* aPersistSizeMode) {
  NS_ENSURE_STATE(mAppWindow);
  nsCOMPtr<dom::Element> docShellElement = mAppWindow->GetWindowDOMElement();
  if (!docShellElement) return NS_ERROR_FAILURE;

  nsAutoString persistString;
  docShellElement->GetAttribute(NS_LITERAL_STRING("persist"), persistString);

  // data structure doesn't quite match the question, but it's close enough
  // for what we want (since this method is never actually called...)
  if (aPersistPosition)
    *aPersistPosition =
        persistString.Find("screenX") >= 0 || persistString.Find("screenY") >= 0
            ? true
            : false;
  if (aPersistSize)
    *aPersistSize =
        persistString.Find("width") >= 0 || persistString.Find("height") >= 0
            ? true
            : false;
  if (aPersistSizeMode)
    *aPersistSizeMode = persistString.Find("sizemode") >= 0 ? true : false;

  return NS_OK;
}

NS_IMETHODIMP
nsContentTreeOwner::GetTabCount(uint32_t* aResult) {
  if (mAppWindow) {
    return mAppWindow->GetTabCount(aResult);
  }

  *aResult = 0;
  return NS_OK;
}

NS_IMETHODIMP
nsContentTreeOwner::GetHasPrimaryContent(bool* aResult) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->GetHasPrimaryContent(aResult);
}

//*****************************************************************************
// nsContentTreeOwner::nsIWebBrowserChrome3
//*****************************************************************************

NS_IMETHODIMP nsContentTreeOwner::OnBeforeLinkTraversal(
    const nsAString& originalTarget, nsIURI* linkURI, nsINode* linkNode,
    bool isAppTab, nsAString& _retval) {
  NS_ENSURE_STATE(mAppWindow);

  nsCOMPtr<nsIXULBrowserWindow> xulBrowserWindow;
  mAppWindow->GetXULBrowserWindow(getter_AddRefs(xulBrowserWindow));

  if (xulBrowserWindow)
    return xulBrowserWindow->OnBeforeLinkTraversal(originalTarget, linkURI,
                                                   linkNode, isAppTab, _retval);

  _retval = originalTarget;
  return NS_OK;
}

NS_IMETHODIMP nsContentTreeOwner::ShouldLoadURI(
    nsIDocShell* aDocShell, nsIURI* aURI, nsIReferrerInfo* aReferrerInfo,
    bool aHasPostData, nsIPrincipal* aTriggeringPrincipal,
    nsIContentSecurityPolicy* aCsp, bool* _retval) {
  NS_ENSURE_STATE(mAppWindow);

  nsCOMPtr<nsIXULBrowserWindow> xulBrowserWindow;
  mAppWindow->GetXULBrowserWindow(getter_AddRefs(xulBrowserWindow));

  if (xulBrowserWindow)
    return xulBrowserWindow->ShouldLoadURI(aDocShell, aURI, aReferrerInfo,
                                           aHasPostData, aTriggeringPrincipal,
                                           aCsp, _retval);

  *_retval = true;
  return NS_OK;
}

NS_IMETHODIMP nsContentTreeOwner::ShouldLoadURIInThisProcess(nsIURI* aURI,
                                                             bool* aRetVal) {
  MOZ_ASSERT_UNREACHABLE("Should only be called in child process.");
  *aRetVal = true;
  return NS_OK;
}

NS_IMETHODIMP nsContentTreeOwner::ReloadInFreshProcess(
    nsIDocShell* aDocShell, nsIURI* aURI, nsIReferrerInfo* aReferrerInfo,
    nsIPrincipal* aTriggeringPrincipal, uint32_t aLoadFlags,
    nsIContentSecurityPolicy* aCsp, bool* aRetVal) {
  NS_WARNING("Cannot reload in fresh process from a nsContentTreeOwner!");
  *aRetVal = false;
  return NS_OK;
}

//*****************************************************************************
// nsContentTreeOwner::nsIWebBrowserChrome
//*****************************************************************************

NS_IMETHODIMP nsContentTreeOwner::SetLinkStatus(const nsAString& aStatusText) {
  NS_ENSURE_STATE(mAppWindow);

  nsCOMPtr<nsIXULBrowserWindow> xulBrowserWindow;
  mAppWindow->GetXULBrowserWindow(getter_AddRefs(xulBrowserWindow));

  if (xulBrowserWindow) {
    xulBrowserWindow->SetOverLink(aStatusText);
  }

  return NS_OK;
}

NS_IMETHODIMP nsContentTreeOwner::SetChromeFlags(uint32_t aChromeFlags) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->SetChromeFlags(aChromeFlags);
}

NS_IMETHODIMP nsContentTreeOwner::GetChromeFlags(uint32_t* aChromeFlags) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->GetChromeFlags(aChromeFlags);
}

NS_IMETHODIMP nsContentTreeOwner::ShowAsModal() {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->ShowModal();
}

NS_IMETHODIMP nsContentTreeOwner::IsWindowModal(bool* _retval) {
  NS_ENSURE_STATE(mAppWindow);
  *_retval = mAppWindow->mContinueModalLoop;
  return NS_OK;
}

//*****************************************************************************
// nsContentTreeOwner::nsIBaseWindow
//*****************************************************************************

NS_IMETHODIMP nsContentTreeOwner::InitWindow(nativeWindow aParentNativeWindow,
                                             nsIWidget* parentWidget, int32_t x,
                                             int32_t y, int32_t cx,
                                             int32_t cy) {
  // Ignore wigdet parents for now.  Don't think those are a vaild thing to
  // call.
  NS_ENSURE_SUCCESS(SetPositionAndSize(x, y, cx, cy, 0), NS_ERROR_FAILURE);

  return NS_OK;
}

NS_IMETHODIMP nsContentTreeOwner::Create() {
  NS_ASSERTION(false, "You can't call this");
  return NS_ERROR_UNEXPECTED;
}

NS_IMETHODIMP nsContentTreeOwner::Destroy() {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->Destroy();
}

NS_IMETHODIMP nsContentTreeOwner::GetUnscaledDevicePixelsPerCSSPixel(
    double* aScale) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->GetUnscaledDevicePixelsPerCSSPixel(aScale);
}

NS_IMETHODIMP nsContentTreeOwner::GetDevicePixelsPerDesktopPixel(
    double* aScale) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->GetDevicePixelsPerDesktopPixel(aScale);
}

NS_IMETHODIMP nsContentTreeOwner::SetPositionDesktopPix(int32_t aX,
                                                        int32_t aY) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->SetPositionDesktopPix(aX, aY);
}

NS_IMETHODIMP nsContentTreeOwner::SetPosition(int32_t aX, int32_t aY) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->SetPosition(aX, aY);
}

NS_IMETHODIMP nsContentTreeOwner::GetPosition(int32_t* aX, int32_t* aY) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->GetPosition(aX, aY);
}

NS_IMETHODIMP nsContentTreeOwner::SetSize(int32_t aCX, int32_t aCY,
                                          bool aRepaint) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->SetSize(aCX, aCY, aRepaint);
}

NS_IMETHODIMP nsContentTreeOwner::GetSize(int32_t* aCX, int32_t* aCY) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->GetSize(aCX, aCY);
}

NS_IMETHODIMP nsContentTreeOwner::SetPositionAndSize(int32_t aX, int32_t aY,
                                                     int32_t aCX, int32_t aCY,
                                                     uint32_t aFlags) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->SetPositionAndSize(aX, aY, aCX, aCY, aFlags);
}

NS_IMETHODIMP nsContentTreeOwner::GetPositionAndSize(int32_t* aX, int32_t* aY,
                                                     int32_t* aCX,
                                                     int32_t* aCY) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->GetPositionAndSize(aX, aY, aCX, aCY);
}

NS_IMETHODIMP nsContentTreeOwner::Repaint(bool aForce) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->Repaint(aForce);
}

NS_IMETHODIMP nsContentTreeOwner::GetParentWidget(nsIWidget** aParentWidget) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->GetParentWidget(aParentWidget);
}

NS_IMETHODIMP nsContentTreeOwner::SetParentWidget(nsIWidget* aParentWidget) {
  NS_ASSERTION(false, "You can't call this");
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP nsContentTreeOwner::GetParentNativeWindow(
    nativeWindow* aParentNativeWindow) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->GetParentNativeWindow(aParentNativeWindow);
}

NS_IMETHODIMP nsContentTreeOwner::SetParentNativeWindow(
    nativeWindow aParentNativeWindow) {
  NS_ASSERTION(false, "You can't call this");
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP nsContentTreeOwner::GetNativeHandle(nsAString& aNativeHandle) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->GetNativeHandle(aNativeHandle);
}

NS_IMETHODIMP nsContentTreeOwner::GetVisibility(bool* aVisibility) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->GetVisibility(aVisibility);
}

NS_IMETHODIMP nsContentTreeOwner::SetVisibility(bool aVisibility) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->SetVisibility(aVisibility);
}

NS_IMETHODIMP nsContentTreeOwner::GetEnabled(bool* aEnabled) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->GetEnabled(aEnabled);
}

NS_IMETHODIMP nsContentTreeOwner::SetEnabled(bool aEnable) {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->SetEnabled(aEnable);
}

NS_IMETHODIMP nsContentTreeOwner::GetMainWidget(nsIWidget** aMainWidget) {
  NS_ENSURE_ARG_POINTER(aMainWidget);
  NS_ENSURE_STATE(mAppWindow);

  *aMainWidget = mAppWindow->mWindow;
  NS_IF_ADDREF(*aMainWidget);

  return NS_OK;
}

NS_IMETHODIMP nsContentTreeOwner::SetFocus() {
  NS_ENSURE_STATE(mAppWindow);
  return mAppWindow->SetFocus();
}

NS_IMETHODIMP nsContentTreeOwner::GetTitle(nsAString& aTitle) {
  NS_ENSURE_STATE(mAppWindow);

  return mAppWindow->GetTitle(aTitle);
}

NS_IMETHODIMP nsContentTreeOwner::SetTitle(const nsAString& aTitle) {
  return NS_OK;
}

//*****************************************************************************
// nsContentTreeOwner: nsIWindowProvider
//*****************************************************************************
NS_IMETHODIMP
nsContentTreeOwner::ProvideWindow(
    mozIDOMWindowProxy* aParent, uint32_t aChromeFlags, bool aCalledFromJS,
    bool aPositionSpecified, bool aSizeSpecified, nsIURI* aURI,
    const nsAString& aName, const nsACString& aFeatures, bool aForceNoOpener,
    bool aForceNoReferrer, nsDocShellLoadState* aLoadState, bool* aWindowIsNew,
    BrowsingContext** aReturn) {
  NS_ENSURE_ARG_POINTER(aParent);

  auto* parentWin = nsPIDOMWindowOuter::From(aParent);
  dom::BrowsingContext* parent =
      parentWin ? parentWin->GetBrowsingContext() : nullptr;

  *aReturn = nullptr;

  if (!mAppWindow) {
    // Nothing to do here
    return NS_OK;
  }

#ifdef DEBUG
  nsCOMPtr<nsIWebNavigation> parentNav = do_GetInterface(aParent);
  nsCOMPtr<nsIDocShellTreeOwner> parentOwner = do_GetInterface(parentNav);
  NS_ASSERTION(
      SameCOMIdentity(parentOwner, static_cast<nsIDocShellTreeOwner*>(this)),
      "Parent from wrong docshell tree?");
#endif

  // If aParent is inside an <iframe mozbrowser> and this isn't a request to
  // open a modal-type window, we're going to create a new <iframe mozbrowser>
  // and return its window here.
  nsCOMPtr<nsIDocShell> docshell = do_GetInterface(aParent);
  if (docshell && docshell->GetIsInMozBrowser() &&
      !(aChromeFlags & (nsIWebBrowserChrome::CHROME_MODAL |
                        nsIWebBrowserChrome::CHROME_OPENAS_DIALOG |
                        nsIWebBrowserChrome::CHROME_OPENAS_CHROME))) {
    BrowserElementParent::OpenWindowResult opened =
        BrowserElementParent::OpenWindowInProcess(
            parent, aURI, aName, aFeatures, aForceNoOpener, aReturn);

    // If OpenWindowInProcess handled the open (by opening it or blocking the
    // popup), tell our caller not to proceed trying to create a new window
    // through other means.
    if (opened != BrowserElementParent::OPEN_WINDOW_IGNORED) {
      *aWindowIsNew = opened == BrowserElementParent::OPEN_WINDOW_ADDED;
      return *aWindowIsNew ? NS_OK : NS_ERROR_ABORT;
    }

    // If we're in an app and the target is _blank, send the url to the OS
    if (aName.LowerCaseEqualsLiteral("_blank")) {
      nsCOMPtr<nsIExternalURLHandlerService> exUrlServ(
          do_GetService(NS_EXTERNALURLHANDLERSERVICE_CONTRACTID));
      if (exUrlServ) {
        nsCOMPtr<nsIHandlerInfo> info;
        bool found;
        exUrlServ->GetURLHandlerInfoFromOS(aURI, &found, getter_AddRefs(info));

        if (info && found) {
          info->LaunchWithURI(aURI, nullptr);
          return NS_ERROR_ABORT;
        }
      }
    }
  }

  int32_t openLocation = nsWindowWatcher::GetWindowOpenLocation(
      parentWin, aChromeFlags, aCalledFromJS, aPositionSpecified,
      aSizeSpecified);

  if (openLocation != nsIBrowserDOMWindow::OPEN_NEWTAB &&
      openLocation != nsIBrowserDOMWindow::OPEN_CURRENTWINDOW) {
    // Just open a window normally
    return NS_OK;
  }

  nsCOMPtr<mozIDOMWindowProxy> domWin;
  mAppWindow->GetWindowDOMWindow(getter_AddRefs(domWin));
  nsCOMPtr<nsIDOMChromeWindow> chromeWin = do_QueryInterface(domWin);
  if (!chromeWin) {
    // Really odd... but whatever
    NS_WARNING("AppWindow's DOMWindow is not a chrome window");
    return NS_OK;
  }

  nsCOMPtr<nsIBrowserDOMWindow> browserDOMWin;
  chromeWin->GetBrowserDOMWindow(getter_AddRefs(browserDOMWin));
  if (!browserDOMWin) {
    return NS_OK;
  }

  *aWindowIsNew = (openLocation != nsIBrowserDOMWindow::OPEN_CURRENTWINDOW);

  {
    dom::AutoNoJSAPI nojsapi;

    uint32_t flags = nsIBrowserDOMWindow::OPEN_NEW;
    if (aForceNoOpener) {
      flags |= nsIBrowserDOMWindow::OPEN_NO_OPENER;
    }
    if (aForceNoReferrer) {
      flags |= nsIBrowserDOMWindow::OPEN_NO_REFERRER;
    }

    // Get a new rendering area from the browserDOMWin.
    // Since we are not loading any URI, we follow the principle of least
    // privilege and use a nullPrincipal as the triggeringPrincipal.
    //
    // This method handles setting the opener for us, so we don't need to set it
    // ourselves.
    RefPtr<NullPrincipal> nullPrincipal =
        NullPrincipal::CreateWithoutOriginAttributes();
    return browserDOMWin->CreateContentWindow(
        aURI, aParent, openLocation, flags, nullPrincipal, nullptr, aReturn);
  }
}

//*****************************************************************************
// nsContentTreeOwner: Accessors
//*****************************************************************************

void nsContentTreeOwner::AppWindow(mozilla::AppWindow* aAppWindow) {
  mAppWindow = aAppWindow;
}

mozilla::AppWindow* nsContentTreeOwner::AppWindow() { return mAppWindow; }

//*****************************************************************************
//*** nsSiteWindow implementation
//*****************************************************************************

nsSiteWindow::nsSiteWindow(nsContentTreeOwner* aAggregator) {
  mAggregator = aAggregator;
}

nsSiteWindow::~nsSiteWindow() {}

NS_IMPL_ADDREF_USING_AGGREGATOR(nsSiteWindow, mAggregator)
NS_IMPL_RELEASE_USING_AGGREGATOR(nsSiteWindow, mAggregator)

NS_INTERFACE_MAP_BEGIN(nsSiteWindow)
  NS_INTERFACE_MAP_ENTRY(nsISupports)
  NS_INTERFACE_MAP_ENTRY(nsIEmbeddingSiteWindow)
NS_INTERFACE_MAP_END_AGGREGATED(mAggregator)

NS_IMETHODIMP
nsSiteWindow::SetDimensions(uint32_t aFlags, int32_t aX, int32_t aY,
                            int32_t aCX, int32_t aCY) {
  // XXX we're ignoring aFlags
  return mAggregator->SetPositionAndSize(aX, aY, aCX, aCY,
                                         nsIBaseWindow::eRepaint);
}

NS_IMETHODIMP
nsSiteWindow::GetDimensions(uint32_t aFlags, int32_t* aX, int32_t* aY,
                            int32_t* aCX, int32_t* aCY) {
  // XXX we're ignoring aFlags
  return mAggregator->GetPositionAndSize(aX, aY, aCX, aCY);
}

NS_IMETHODIMP
nsSiteWindow::SetFocus(void) {
#if 0
  /* This implementation focuses the main document and could make sense.
     However this method is actually being used from within
     nsGlobalWindow::Focus (providing a hook for MDI embedding apps)
     and it's better for our purposes to not pick a document and
     focus it, but allow nsGlobalWindow to carry on unhindered.
  */
  AppWindow *window = mAggregator->AppWindow();
  if (window) {
    nsCOMPtr<nsIDocShell> docshell;
    window->GetDocShell(getter_AddRefs(docshell));
    if (docShell) {
      nsCOMPtr<nsPIDOMWindowOuter> domWindow(docShell->GetWindow());
      if (domWindow)
        domWindow->Focus();
    }
  }
#endif
  return NS_OK;
}

/* this implementation focuses another window. if there isn't another
   window to focus, we do nothing. */
NS_IMETHODIMP
nsSiteWindow::Blur(void) {
  NS_DEFINE_CID(kWindowMediatorCID, NS_WINDOWMEDIATOR_CID);

  nsCOMPtr<nsISimpleEnumerator> windowEnumerator;
  nsCOMPtr<nsIAppWindow> appWindow;
  bool more, foundUs;
  AppWindow* ourWindow = mAggregator->AppWindow();

  {
    nsCOMPtr<nsIWindowMediator> windowMediator(
        do_GetService(kWindowMediatorCID));
    if (windowMediator)
      windowMediator->GetZOrderAppWindowEnumerator(
          0, true, getter_AddRefs(windowEnumerator));
  }

  if (!windowEnumerator) return NS_ERROR_FAILURE;

  // step through the top-level windows
  foundUs = false;
  windowEnumerator->HasMoreElements(&more);
  while (more) {
    nsCOMPtr<nsISupports> nextWindow;
    nsCOMPtr<nsIAppWindow> nextAppWindow;

    windowEnumerator->GetNext(getter_AddRefs(nextWindow));
    nextAppWindow = do_QueryInterface(nextWindow);

    // got it!(?)
    if (foundUs) {
      appWindow = nextAppWindow;
      break;
    }

    // remember the very first one, in case we have to wrap
    if (!appWindow) appWindow = nextAppWindow;

    // look for us
    if (nextAppWindow == ourWindow) foundUs = true;

    windowEnumerator->HasMoreElements(&more);
  }

  // change focus to the window we just found
  if (appWindow) {
    nsCOMPtr<nsIDocShell> docshell;
    appWindow->GetDocShell(getter_AddRefs(docshell));
    if (!docshell) {
      return NS_OK;
    }

    nsCOMPtr<nsPIDOMWindowOuter> domWindow = docshell->GetWindow();
    if (domWindow) domWindow->Focus();
  }
  return NS_OK;
}

NS_IMETHODIMP
nsSiteWindow::GetVisibility(bool* aVisibility) {
  return mAggregator->GetVisibility(aVisibility);
}

NS_IMETHODIMP
nsSiteWindow::SetVisibility(bool aVisibility) {
  return mAggregator->SetVisibility(aVisibility);
}

NS_IMETHODIMP
nsSiteWindow::GetTitle(nsAString& aTitle) {
  return mAggregator->GetTitle(aTitle);
}

NS_IMETHODIMP
nsSiteWindow::SetTitle(const nsAString& aTitle) {
  return mAggregator->SetTitle(aTitle);
}

NS_IMETHODIMP
nsSiteWindow::GetSiteWindow(void** aSiteWindow) {
  return mAggregator->GetParentNativeWindow(aSiteWindow);
}