Add m-esr52 at 52.6.0

1 files changed, 2442 insertions, 0 deletions

diff --git a/layout/xul/nsMenuPopupFrame.cpp b/layout/xul/nsMenuPopupFrame.cpp
new file mode 100644
index 000000000..6e706e49c
--- /dev/null
+++ b/layout/xul/nsMenuPopupFrame.cpp
@@ -0,0 +1,2442 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 sw=2 et tw=78: */
+/* 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 "nsMenuPopupFrame.h"
+#include "nsGkAtoms.h"
+#include "nsIContent.h"
+#include "nsIAtom.h"
+#include "nsPresContext.h"
+#include "nsStyleContext.h"
+#include "nsCSSRendering.h"
+#include "nsNameSpaceManager.h"
+#include "nsViewManager.h"
+#include "nsWidgetsCID.h"
+#include "nsMenuFrame.h"
+#include "nsMenuBarFrame.h"
+#include "nsPopupSetFrame.h"
+#include "nsPIDOMWindow.h"
+#include "nsIDOMKeyEvent.h"
+#include "nsIDOMScreen.h"
+#include "nsIPresShell.h"
+#include "nsFrameManager.h"
+#include "nsIDocument.h"
+#include "nsRect.h"
+#include "nsIComponentManager.h"
+#include "nsBoxLayoutState.h"
+#include "nsIScrollableFrame.h"
+#include "nsIRootBox.h"
+#include "nsIDocShell.h"
+#include "nsReadableUtils.h"
+#include "nsUnicharUtils.h"
+#include "nsLayoutUtils.h"
+#include "nsContentUtils.h"
+#include "nsCSSFrameConstructor.h"
+#include "nsPIWindowRoot.h"
+#include "nsIReflowCallback.h"
+#include "nsBindingManager.h"
+#include "nsIDocShellTreeOwner.h"
+#include "nsIBaseWindow.h"
+#include "nsISound.h"
+#include "nsIScreenManager.h"
+#include "nsIServiceManager.h"
+#include "nsThemeConstants.h"
+#include "nsTransitionManager.h"
+#include "nsDisplayList.h"
+#include "nsIDOMXULSelectCntrlItemEl.h"
+#include "mozilla/EventDispatcher.h"
+#include "mozilla/EventStateManager.h"
+#include "mozilla/EventStates.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/LookAndFeel.h"
+#include "mozilla/MouseEvents.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/PopupBoxObject.h"
+#include <algorithm>
+
+using namespace mozilla;
+using mozilla::dom::PopupBoxObject;
+
+int8_t nsMenuPopupFrame::sDefaultLevelIsTop = -1;
+
+DOMTimeStamp nsMenuPopupFrame::sLastKeyTime = 0;
+
+// XXX, kyle.yuan@sun.com, there are 4 definitions for the same purpose:
+//  nsMenuPopupFrame.h, nsListControlFrame.cpp, listbox.xml, tree.xml
+//  need to find a good place to put them together.
+//  if someone changes one, please also change the other.
+uint32_t nsMenuPopupFrame::sTimeoutOfIncrementalSearch = 1000;
+
+const char* kPrefIncrementalSearchTimeout =
+  "ui.menu.incremental_search.timeout";
+
+// NS_NewMenuPopupFrame
+//
+// Wrapper for creating a new menu popup container
+//
+nsIFrame*
+NS_NewMenuPopupFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
+{
+  return new (aPresShell) nsMenuPopupFrame(aContext);
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsMenuPopupFrame)
+
+NS_QUERYFRAME_HEAD(nsMenuPopupFrame)
+  NS_QUERYFRAME_ENTRY(nsMenuPopupFrame)
+NS_QUERYFRAME_TAIL_INHERITING(nsBoxFrame)
+
+//
+// nsMenuPopupFrame ctor
+//
+nsMenuPopupFrame::nsMenuPopupFrame(nsStyleContext* aContext)
+  :nsBoxFrame(aContext),
+  mCurrentMenu(nullptr),
+  mPrefSize(-1, -1),
+  mLastClientOffset(0, 0),
+  mPopupType(ePopupTypePanel),
+  mPopupState(ePopupClosed),
+  mPopupAlignment(POPUPALIGNMENT_NONE),
+  mPopupAnchor(POPUPALIGNMENT_NONE),
+  mPosition(POPUPPOSITION_UNKNOWN),
+  mConsumeRollupEvent(PopupBoxObject::ROLLUP_DEFAULT),
+  mFlip(FlipType_Default),
+  mIsOpenChanged(false),
+  mIsContextMenu(false),
+  mAdjustOffsetForContextMenu(false),
+  mGeneratedChildren(false),
+  mMenuCanOverlapOSBar(false),
+  mShouldAutoPosition(true),
+  mInContentShell(true),
+  mIsMenuLocked(false),
+  mMouseTransparent(false),
+  mHFlip(false),
+  mVFlip(false),
+  mAnchorType(MenuPopupAnchorType_Node)
+{
+  // the preference name is backwards here. True means that the 'top' level is
+  // the default, and false means that the 'parent' level is the default.
+  if (sDefaultLevelIsTop >= 0)
+    return;
+  sDefaultLevelIsTop =
+    Preferences::GetBool("ui.panel.default_level_parent", false);
+  Preferences::AddUintVarCache(&sTimeoutOfIncrementalSearch,
+                               kPrefIncrementalSearchTimeout, 1000);
+} // ctor
+
+void
+nsMenuPopupFrame::Init(nsIContent*       aContent,
+                       nsContainerFrame* aParent,
+                       nsIFrame*         aPrevInFlow)
+{
+  nsBoxFrame::Init(aContent, aParent, aPrevInFlow);
+
+  // lookup if we're allowed to overlap the OS bar (menubar/taskbar) from the
+  // look&feel object
+  mMenuCanOverlapOSBar =
+    LookAndFeel::GetInt(LookAndFeel::eIntID_MenusCanOverlapOSBar) != 0;
+
+  CreatePopupView();
+
+  // XXX Hack. The popup's view should float above all other views,
+  // so we use the nsView::SetFloating() to tell the view manager
+  // about that constraint.
+  nsView* ourView = GetView();
+  nsViewManager* viewManager = ourView->GetViewManager();
+  viewManager->SetViewFloating(ourView, true);
+
+  mPopupType = ePopupTypePanel;
+  nsIDocument* doc = aContent->OwnerDoc();
+  int32_t namespaceID;
+  nsCOMPtr<nsIAtom> tag = doc->BindingManager()->ResolveTag(aContent, &namespaceID);
+  if (namespaceID == kNameSpaceID_XUL) {
+    if (tag == nsGkAtoms::menupopup || tag == nsGkAtoms::popup)
+      mPopupType = ePopupTypeMenu;
+    else if (tag == nsGkAtoms::tooltip)
+      mPopupType = ePopupTypeTooltip;
+  }
+
+  nsCOMPtr<nsIDocShellTreeItem> dsti = PresContext()->GetDocShell();
+  if (dsti && dsti->ItemType() == nsIDocShellTreeItem::typeChrome) {
+    mInContentShell = false;
+  }
+
+  // To improve performance, create the widget for the popup only if it is not
+  // a leaf. Leaf popups such as menus will create their widgets later when
+  // the popup opens.
+  if (!IsLeaf() && !ourView->HasWidget()) {
+    CreateWidgetForView(ourView);
+  }
+
+  if (aContent->NodeInfo()->Equals(nsGkAtoms::tooltip, kNameSpaceID_XUL) &&
+      aContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::_default,
+                            nsGkAtoms::_true, eIgnoreCase)) {
+    nsIRootBox* rootBox =
+      nsIRootBox::GetRootBox(PresContext()->GetPresShell());
+    if (rootBox) {
+      rootBox->SetDefaultTooltip(aContent);
+    }
+  }
+
+  AddStateBits(NS_FRAME_IN_POPUP);
+}
+
+bool
+nsMenuPopupFrame::IsNoAutoHide() const
+{
+  // Panels with noautohide="true" don't hide when the mouse is clicked
+  // outside of them, or when another application is made active. Non-autohide
+  // panels cannot be used in content windows.
+  return (!mInContentShell && mPopupType == ePopupTypePanel &&
+           mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::noautohide,
+                                 nsGkAtoms::_true, eIgnoreCase));
+}
+
+nsPopupLevel
+nsMenuPopupFrame::PopupLevel(bool aIsNoAutoHide) const
+{
+  // The popup level is determined as follows, in this order:
+  //   1. non-panels (menus and tooltips) are always topmost
+  //   2. any specified level attribute
+  //   3. if a titlebar attribute is set, use the 'floating' level
+  //   4. if this is a noautohide panel, use the 'parent' level
+  //   5. use the platform-specific default level
+
+  // If this is not a panel, this is always a top-most popup.
+  if (mPopupType != ePopupTypePanel)
+    return ePopupLevelTop;
+
+  // If the level attribute has been set, use that.
+  static nsIContent::AttrValuesArray strings[] =
+    {&nsGkAtoms::top, &nsGkAtoms::parent, &nsGkAtoms::floating, nullptr};
+  switch (mContent->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::level,
+                                    strings, eCaseMatters)) {
+    case 0:
+      return ePopupLevelTop;
+    case 1:
+      return ePopupLevelParent;
+    case 2:
+      return ePopupLevelFloating;
+  }
+
+  // Panels with titlebars most likely want to be floating popups.
+  if (mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::titlebar))
+    return ePopupLevelFloating;
+
+  // If this panel is a noautohide panel, the default is the parent level.
+  if (aIsNoAutoHide)
+    return ePopupLevelParent;
+
+  // Otherwise, the result depends on the platform.
+  return sDefaultLevelIsTop ? ePopupLevelTop : ePopupLevelParent;
+}
+
+void
+nsMenuPopupFrame::EnsureWidget()
+{
+  nsView* ourView = GetView();
+  if (!ourView->HasWidget()) {
+    NS_ASSERTION(!mGeneratedChildren && !PrincipalChildList().FirstChild(),
+                 "Creating widget for MenuPopupFrame with children");
+    CreateWidgetForView(ourView);
+  }
+}
+
+nsresult
+nsMenuPopupFrame::CreateWidgetForView(nsView* aView)
+{
+  // Create a widget for ourselves.
+  nsWidgetInitData widgetData;
+  widgetData.mWindowType = eWindowType_popup;
+  widgetData.mBorderStyle = eBorderStyle_default;
+  widgetData.clipSiblings = true;
+  widgetData.mPopupHint = mPopupType;
+  widgetData.mNoAutoHide = IsNoAutoHide();
+
+  if (!mInContentShell) {
+    // A drag popup may be used for non-static translucent drag feedback
+    if (mPopupType == ePopupTypePanel &&
+        mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
+                              nsGkAtoms::drag, eIgnoreCase)) {
+      widgetData.mIsDragPopup = true;
+    }
+
+    // If mousethrough="always" is set directly on the popup, then the widget
+    // should ignore mouse events, passing them through to the content behind.
+    mMouseTransparent = GetStateBits() & NS_FRAME_MOUSE_THROUGH_ALWAYS;
+    widgetData.mMouseTransparent = mMouseTransparent;
+  }
+
+  nsAutoString title;
+  if (mContent && widgetData.mNoAutoHide) {
+    if (mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::titlebar,
+                              nsGkAtoms::normal, eCaseMatters)) {
+      widgetData.mBorderStyle = eBorderStyle_title;
+
+      mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::label, title);
+
+      if (mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::close,
+                                nsGkAtoms::_true, eCaseMatters)) {
+        widgetData.mBorderStyle =
+          static_cast<enum nsBorderStyle>(widgetData.mBorderStyle | eBorderStyle_close);
+      }
+    }
+  }
+
+  nsTransparencyMode mode = nsLayoutUtils::GetFrameTransparency(this, this);
+  nsIContent* parentContent = GetContent()->GetParent();
+  nsIAtom *tag = nullptr;
+  if (parentContent && parentContent->IsXULElement())
+    tag = parentContent->NodeInfo()->NameAtom();
+  widgetData.mSupportTranslucency = mode == eTransparencyTransparent;
+  widgetData.mDropShadow = !(mode == eTransparencyTransparent || tag == nsGkAtoms::menulist);
+  widgetData.mPopupLevel = PopupLevel(widgetData.mNoAutoHide);
+
+  // panels which have a parent level need a parent widget. This allows them to
+  // always appear in front of the parent window but behind other windows that
+  // should be in front of it.
+  nsCOMPtr<nsIWidget> parentWidget;
+  if (widgetData.mPopupLevel != ePopupLevelTop) {
+    nsCOMPtr<nsIDocShellTreeItem> dsti = PresContext()->GetDocShell();
+    if (!dsti)
+      return NS_ERROR_FAILURE;
+
+    nsCOMPtr<nsIDocShellTreeOwner> treeOwner;
+    dsti->GetTreeOwner(getter_AddRefs(treeOwner));
+    if (!treeOwner) return NS_ERROR_FAILURE;
+
+    nsCOMPtr<nsIBaseWindow> baseWindow(do_QueryInterface(treeOwner));
+    if (baseWindow)
+      baseWindow->GetMainWidget(getter_AddRefs(parentWidget));
+  }
+
+  nsresult rv = aView->CreateWidgetForPopup(&widgetData, parentWidget,
+                                            true, true);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  nsIWidget* widget = aView->GetWidget();
+  widget->SetTransparencyMode(mode);
+  widget->SetWindowShadowStyle(GetShadowStyle());
+
+  // most popups don't have a title so avoid setting the title if there isn't one
+  if (!title.IsEmpty()) {
+    widget->SetTitle(title);
+  }
+
+  return NS_OK;
+}
+
+uint8_t
+nsMenuPopupFrame::GetShadowStyle()
+{
+  uint8_t shadow = StyleUIReset()->mWindowShadow;
+  if (shadow != NS_STYLE_WINDOW_SHADOW_DEFAULT)
+    return shadow;
+
+  switch (StyleDisplay()->mAppearance) {
+    case NS_THEME_TOOLTIP:
+      return NS_STYLE_WINDOW_SHADOW_TOOLTIP;
+    case NS_THEME_MENUPOPUP:
+      return NS_STYLE_WINDOW_SHADOW_MENU;
+  }
+  return NS_STYLE_WINDOW_SHADOW_DEFAULT;
+}
+
+NS_IMETHODIMP nsXULPopupShownEvent::Run()
+{
+  nsMenuPopupFrame* popup = do_QueryFrame(mPopup->GetPrimaryFrame());
+  // Set the state to visible if the popup is still open.
+  if (popup && popup->IsOpen()) {
+    popup->SetPopupState(ePopupShown);
+  }
+
+  WidgetMouseEvent event(true, eXULPopupShown, nullptr,
+                         WidgetMouseEvent::eReal);
+  return EventDispatcher::Dispatch(mPopup, mPresContext, &event);                 
+}
+
+NS_IMETHODIMP nsXULPopupShownEvent::HandleEvent(nsIDOMEvent* aEvent)
+{
+  nsMenuPopupFrame* popup = do_QueryFrame(mPopup->GetPrimaryFrame());
+  nsCOMPtr<nsIDOMEventTarget> eventTarget;
+  aEvent->GetTarget(getter_AddRefs(eventTarget));
+  // Ignore events not targeted at the popup itself (ie targeted at
+  // descendants):
+  if (!SameCOMIdentity(mPopup, eventTarget)) {
+    return NS_OK;
+  }
+  if (popup) {
+    // ResetPopupShownDispatcher will delete the reference to this, so keep
+    // another one until Run is finished.
+    RefPtr<nsXULPopupShownEvent> event = this;
+    // Only call Run if it the dispatcher was assigned. This avoids calling the
+    // Run method if the transitionend event fires multiple times.
+    if (popup->ClearPopupShownDispatcher()) {
+      return Run();
+    }
+  }
+
+  CancelListener();
+  return NS_OK;
+}
+
+void nsXULPopupShownEvent::CancelListener()
+{
+  mPopup->RemoveSystemEventListener(NS_LITERAL_STRING("transitionend"), this, false);
+}
+
+NS_IMPL_ISUPPORTS_INHERITED(nsXULPopupShownEvent, Runnable, nsIDOMEventListener);
+
+void
+nsMenuPopupFrame::SetInitialChildList(ChildListID  aListID,
+                                      nsFrameList& aChildList)
+{
+  // unless the list is empty, indicate that children have been generated.
+  if (aListID == kPrincipalList && aChildList.NotEmpty()) {
+    mGeneratedChildren = true;
+  }
+  nsBoxFrame::SetInitialChildList(aListID, aChildList);
+}
+
+bool
+nsMenuPopupFrame::IsLeaf() const
+{
+  if (mGeneratedChildren)
+    return false;
+
+  if (mPopupType != ePopupTypeMenu) {
+    // any panel with a type attribute, such as the autocomplete popup,
+    // is always generated right away.
+    return !mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::type);
+  }
+
+  // menu popups generate their child frames lazily only when opened, so
+  // behave like a leaf frame. However, generate child frames normally if
+  // the parent menu has a sizetopopup attribute. In this case the size of
+  // the parent menu is dependent on the size of the popup, so the frames
+  // need to exist in order to calculate this size.
+  nsIContent* parentContent = mContent->GetParent();
+  return (parentContent &&
+          !parentContent->HasAttr(kNameSpaceID_None, nsGkAtoms::sizetopopup));
+}
+
+void
+nsMenuPopupFrame::LayoutPopup(nsBoxLayoutState& aState, nsIFrame* aParentMenu,
+                              nsIFrame* aAnchor, bool aSizedToPopup)
+{
+  if (!mGeneratedChildren)
+    return;
+
+  SchedulePaint();
+
+  bool shouldPosition = true;
+  bool isOpen = IsOpen();
+  if (!isOpen) {
+    // if the popup is not open, only do layout while showing or if the menu
+    // is sized to the popup
+    shouldPosition = (mPopupState == ePopupShowing || mPopupState == ePopupPositioning);
+    if (!shouldPosition && !aSizedToPopup) {
+      RemoveStateBits(NS_FRAME_FIRST_REFLOW);
+      return;
+    }
+  }
+
+  // if the popup has just been opened, make sure the scrolled window is at 0,0
+  // Don't scroll menulists as they will scroll to their selected item on their own.
+  if (mIsOpenChanged && !IsMenuList()) {
+    nsIScrollableFrame *scrollframe = do_QueryFrame(nsBox::GetChildXULBox(this));
+    if (scrollframe) {
+      nsWeakFrame weakFrame(this);
+      scrollframe->ScrollTo(nsPoint(0,0), nsIScrollableFrame::INSTANT);
+      if (!weakFrame.IsAlive()) {
+        return;
+      }
+    }
+  }
+
+  // get the preferred, minimum and maximum size. If the menu is sized to the
+  // popup, then the popup's width is the menu's width.
+  nsSize prefSize = GetXULPrefSize(aState);
+  nsSize minSize = GetXULMinSize(aState); 
+  nsSize maxSize = GetXULMaxSize(aState);
+
+  if (aSizedToPopup) {
+    prefSize.width = aParentMenu->GetRect().width;
+  }
+  prefSize = BoundsCheck(minSize, prefSize, maxSize);
+
+  // if the size changed then set the bounds to be the preferred size
+  bool sizeChanged = (mPrefSize != prefSize);
+  if (sizeChanged) {
+    SetXULBounds(aState, nsRect(0, 0, prefSize.width, prefSize.height), false);
+    mPrefSize = prefSize;
+  }
+
+  bool needCallback = false;
+  if (shouldPosition) {
+    SetPopupPosition(aAnchor, false, aSizedToPopup, mPopupState == ePopupPositioning);
+    needCallback = true;
+  }
+
+  nsRect bounds(GetRect());
+  XULLayout(aState);
+
+  // if the width or height changed, readjust the popup position. This is a
+  // special case for tooltips where the preferred height doesn't include the
+  // real height for its inline element, but does once it is laid out.
+  // This is bug 228673 which doesn't have a simple fix.
+  bool rePosition = shouldPosition && (mPosition == POPUPPOSITION_SELECTION);
+  if (!aParentMenu) {
+    nsSize newsize = GetSize();
+    if (newsize.width > bounds.width || newsize.height > bounds.height) {
+      // the size after layout was larger than the preferred size,
+      // so set the preferred size accordingly
+      mPrefSize = newsize;
+      if (isOpen) {
+        rePosition = true;
+        needCallback = true;
+      }
+    }
+  }
+
+  if (rePosition) {
+    SetPopupPosition(aAnchor, false, aSizedToPopup, false);
+  }
+
+  nsPresContext* pc = PresContext();
+  nsView* view = GetView();
+
+  if (sizeChanged) {
+    // If the size of the popup changed, apply any size constraints.
+    nsIWidget* widget = view->GetWidget();
+    if (widget) {
+      SetSizeConstraints(pc, widget, minSize, maxSize);
+    }
+  }
+
+  if (isOpen) {
+    nsViewManager* viewManager = view->GetViewManager();
+    nsRect rect = GetRect();
+    rect.x = rect.y = 0;
+    viewManager->ResizeView(view, rect);
+
+    if (mPopupState == ePopupOpening) {
+      mPopupState = ePopupVisible;
+    }
+
+    viewManager->SetViewVisibility(view, nsViewVisibility_kShow);
+    nsContainerFrame::SyncFrameViewProperties(pc, this, nullptr, view, 0);
+  }
+
+  // finally, if the popup just opened, send a popupshown event
+  if (mIsOpenChanged) {
+    mIsOpenChanged = false;
+
+    // Make sure the current selection in a menulist is visible.
+    if (IsMenuList() && mCurrentMenu) {
+      EnsureMenuItemIsVisible(mCurrentMenu);
+    }
+
+#ifndef MOZ_WIDGET_GTK
+    // If the animate attribute is set to open, check for a transition and wait
+    // for it to finish before firing the popupshown event.
+    if (mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::animate,
+                              nsGkAtoms::open, eCaseMatters) &&
+        nsLayoutUtils::HasCurrentTransitions(this)) {
+      mPopupShownDispatcher = new nsXULPopupShownEvent(mContent, pc);
+      mContent->AddSystemEventListener(NS_LITERAL_STRING("transitionend"),
+                                       mPopupShownDispatcher, false, false);
+      return;
+    }
+#endif
+
+    // If there are no transitions, fire the popupshown event right away.
+    nsCOMPtr<nsIRunnable> event = new nsXULPopupShownEvent(GetContent(), pc);
+    NS_DispatchToCurrentThread(event);
+  }
+
+  if (needCallback && !mReflowCallbackData.mPosted) {
+    pc->PresShell()->PostReflowCallback(this);
+    mReflowCallbackData.MarkPosted(aAnchor, aSizedToPopup);
+  }
+}
+
+bool
+nsMenuPopupFrame::ReflowFinished()
+{
+  SetPopupPosition(mReflowCallbackData.mAnchor, false, mReflowCallbackData.mSizedToPopup, false);
+
+  mReflowCallbackData.Clear();
+
+  return false;
+}
+
+void
+nsMenuPopupFrame::ReflowCallbackCanceled()
+{
+  mReflowCallbackData.Clear();
+}
+
+bool
+nsMenuPopupFrame::IsMenuList()
+{
+  nsIFrame* parentMenu = GetParent();
+  if (!parentMenu) {
+    return false;
+  }
+
+  nsCOMPtr<nsIDOMXULMenuListElement> menulist = do_QueryInterface(parentMenu->GetContent());
+  return menulist != nullptr;
+}
+
+nsIContent*
+nsMenuPopupFrame::GetTriggerContent(nsMenuPopupFrame* aMenuPopupFrame)
+{
+  while (aMenuPopupFrame) {
+    if (aMenuPopupFrame->mTriggerContent)
+      return aMenuPopupFrame->mTriggerContent;
+
+    // check up the menu hierarchy until a popup with a trigger node is found
+    nsMenuFrame* menuFrame = do_QueryFrame(aMenuPopupFrame->GetParent());
+    if (!menuFrame)
+      break;
+
+    nsMenuParent* parentPopup = menuFrame->GetMenuParent();
+    if (!parentPopup || !parentPopup->IsMenu())
+      break;
+
+    aMenuPopupFrame = static_cast<nsMenuPopupFrame *>(parentPopup);
+  }
+
+  return nullptr;
+}
+
+void
+nsMenuPopupFrame::InitPositionFromAnchorAlign(const nsAString& aAnchor,
+                                              const nsAString& aAlign)
+{
+  mTriggerContent = nullptr;
+
+  if (aAnchor.EqualsLiteral("topleft"))
+    mPopupAnchor = POPUPALIGNMENT_TOPLEFT;
+  else if (aAnchor.EqualsLiteral("topright"))
+    mPopupAnchor = POPUPALIGNMENT_TOPRIGHT;
+  else if (aAnchor.EqualsLiteral("bottomleft"))
+    mPopupAnchor = POPUPALIGNMENT_BOTTOMLEFT;
+  else if (aAnchor.EqualsLiteral("bottomright"))
+    mPopupAnchor = POPUPALIGNMENT_BOTTOMRIGHT;
+  else if (aAnchor.EqualsLiteral("leftcenter"))
+    mPopupAnchor = POPUPALIGNMENT_LEFTCENTER;
+  else if (aAnchor.EqualsLiteral("rightcenter"))
+    mPopupAnchor = POPUPALIGNMENT_RIGHTCENTER;
+  else if (aAnchor.EqualsLiteral("topcenter"))
+    mPopupAnchor = POPUPALIGNMENT_TOPCENTER;
+  else if (aAnchor.EqualsLiteral("bottomcenter"))
+    mPopupAnchor = POPUPALIGNMENT_BOTTOMCENTER;
+  else
+    mPopupAnchor = POPUPALIGNMENT_NONE;
+
+  if (aAlign.EqualsLiteral("topleft"))
+    mPopupAlignment = POPUPALIGNMENT_TOPLEFT;
+  else if (aAlign.EqualsLiteral("topright"))
+    mPopupAlignment = POPUPALIGNMENT_TOPRIGHT;
+  else if (aAlign.EqualsLiteral("bottomleft"))
+    mPopupAlignment = POPUPALIGNMENT_BOTTOMLEFT;
+  else if (aAlign.EqualsLiteral("bottomright"))
+    mPopupAlignment = POPUPALIGNMENT_BOTTOMRIGHT;
+  else
+    mPopupAlignment = POPUPALIGNMENT_NONE;
+
+  mPosition = POPUPPOSITION_UNKNOWN;
+}
+
+void
+nsMenuPopupFrame::InitializePopup(nsIContent* aAnchorContent,
+                                  nsIContent* aTriggerContent,
+                                  const nsAString& aPosition,
+                                  int32_t aXPos, int32_t aYPos,
+                                  MenuPopupAnchorType aAnchorType,
+                                  bool aAttributesOverride)
+{
+  EnsureWidget();
+
+  mPopupState = ePopupShowing;
+  mAnchorContent = aAnchorContent;
+  mTriggerContent = aTriggerContent;
+  mXPos = aXPos;
+  mYPos = aYPos;
+  mAdjustOffsetForContextMenu = false;
+  mVFlip = false;
+  mHFlip = false;
+  mAlignmentOffset = 0;
+
+  mAnchorType = aAnchorType;
+
+  // if aAttributesOverride is true, then the popupanchor, popupalign and
+  // position attributes on the <popup> override those values passed in.
+  // If false, those attributes are only used if the values passed in are empty
+  if (aAnchorContent || aAnchorType == MenuPopupAnchorType_Rect) {
+    nsAutoString anchor, align, position, flip;
+    mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::popupanchor, anchor);
+    mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::popupalign, align);
+    mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::position, position);
+    mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::flip, flip);
+
+    if (aAttributesOverride) {
+      // if the attributes are set, clear the offset position. Otherwise,
+      // the offset is used to adjust the position from the anchor point
+      if (anchor.IsEmpty() && align.IsEmpty() && position.IsEmpty())
+        position.Assign(aPosition);
+      else
+        mXPos = mYPos = 0;
+    }
+    else if (!aPosition.IsEmpty()) {
+      position.Assign(aPosition);
+    }
+
+    if (flip.EqualsLiteral("none")) {
+      mFlip = FlipType_None;
+    } else if (flip.EqualsLiteral("both")) {
+      mFlip = FlipType_Both;
+    } else if (flip.EqualsLiteral("slide")) {
+      mFlip = FlipType_Slide;
+    }
+
+    position.CompressWhitespace();
+    int32_t spaceIdx = position.FindChar(' ');
+    // if there is a space in the position, assume it is the anchor and
+    // alignment as two separate tokens.
+    if (spaceIdx >= 0) {
+      InitPositionFromAnchorAlign(Substring(position, 0, spaceIdx), Substring(position, spaceIdx + 1));
+    }
+    else if (position.EqualsLiteral("before_start")) {
+      mPopupAnchor = POPUPALIGNMENT_TOPLEFT;
+      mPopupAlignment = POPUPALIGNMENT_BOTTOMLEFT;
+      mPosition = POPUPPOSITION_BEFORESTART;
+    }
+    else if (position.EqualsLiteral("before_end")) {
+      mPopupAnchor = POPUPALIGNMENT_TOPRIGHT;
+      mPopupAlignment = POPUPALIGNMENT_BOTTOMRIGHT;
+      mPosition = POPUPPOSITION_BEFOREEND;
+    }
+    else if (position.EqualsLiteral("after_start")) {
+      mPopupAnchor = POPUPALIGNMENT_BOTTOMLEFT;
+      mPopupAlignment = POPUPALIGNMENT_TOPLEFT;
+      mPosition = POPUPPOSITION_AFTERSTART;
+    }
+    else if (position.EqualsLiteral("after_end")) {
+      mPopupAnchor = POPUPALIGNMENT_BOTTOMRIGHT;
+      mPopupAlignment = POPUPALIGNMENT_TOPRIGHT;
+      mPosition = POPUPPOSITION_AFTEREND;
+    }
+    else if (position.EqualsLiteral("start_before")) {
+      mPopupAnchor = POPUPALIGNMENT_TOPLEFT;
+      mPopupAlignment = POPUPALIGNMENT_TOPRIGHT;
+      mPosition = POPUPPOSITION_STARTBEFORE;
+    }
+    else if (position.EqualsLiteral("start_after")) {
+      mPopupAnchor = POPUPALIGNMENT_BOTTOMLEFT;
+      mPopupAlignment = POPUPALIGNMENT_BOTTOMRIGHT;
+      mPosition = POPUPPOSITION_STARTAFTER;
+    }
+    else if (position.EqualsLiteral("end_before")) {
+      mPopupAnchor = POPUPALIGNMENT_TOPRIGHT;
+      mPopupAlignment = POPUPALIGNMENT_TOPLEFT;
+      mPosition = POPUPPOSITION_ENDBEFORE;
+    }
+    else if (position.EqualsLiteral("end_after")) {
+      mPopupAnchor = POPUPALIGNMENT_BOTTOMRIGHT;
+      mPopupAlignment = POPUPALIGNMENT_BOTTOMLEFT;
+      mPosition = POPUPPOSITION_ENDAFTER;
+    }
+    else if (position.EqualsLiteral("overlap")) {
+      mPopupAnchor = POPUPALIGNMENT_TOPLEFT;
+      mPopupAlignment = POPUPALIGNMENT_TOPLEFT;
+      mPosition = POPUPPOSITION_OVERLAP;
+    }
+    else if (position.EqualsLiteral("after_pointer")) {
+      mPopupAnchor = POPUPALIGNMENT_TOPLEFT;
+      mPopupAlignment = POPUPALIGNMENT_TOPLEFT;
+      mPosition = POPUPPOSITION_AFTERPOINTER;
+      // XXXndeakin this is supposed to anchor vertically after, but with the
+      // horizontal position as the mouse pointer.
+      mYPos += 21;
+    }
+    else if (position.EqualsLiteral("selection")) {
+      mPopupAnchor = POPUPALIGNMENT_BOTTOMLEFT;
+      mPopupAlignment = POPUPALIGNMENT_TOPLEFT;
+      mPosition = POPUPPOSITION_SELECTION;
+    }
+    else {
+      InitPositionFromAnchorAlign(anchor, align);
+    }
+  }
+
+  mScreenRect = nsIntRect(-1, -1, 0, 0);
+
+  if (aAttributesOverride) {
+    // Use |left| and |top| dimension attributes to position the popup if
+    // present, as they may have been persisted. 
+    nsAutoString left, top;
+    mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::left, left);
+    mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::top, top);
+
+    nsresult err;
+    if (!left.IsEmpty()) {
+      int32_t x = left.ToInteger(&err);
+      if (NS_SUCCEEDED(err))
+        mScreenRect.x = x;
+    }
+    if (!top.IsEmpty()) {
+      int32_t y = top.ToInteger(&err);
+      if (NS_SUCCEEDED(err))
+        mScreenRect.y = y;
+    }
+  }
+}
+
+void
+nsMenuPopupFrame::InitializePopupAtScreen(nsIContent* aTriggerContent,
+                                          int32_t aXPos, int32_t aYPos,
+                                          bool aIsContextMenu)
+{
+  EnsureWidget();
+
+  mPopupState = ePopupShowing;
+  mAnchorContent = nullptr;
+  mTriggerContent = aTriggerContent;
+  mScreenRect = nsIntRect(aXPos, aYPos, 0, 0);
+  mXPos = 0;
+  mYPos = 0;
+  mFlip = FlipType_Default;
+  mPopupAnchor = POPUPALIGNMENT_NONE;
+  mPopupAlignment = POPUPALIGNMENT_NONE;
+  mPosition = POPUPPOSITION_UNKNOWN;
+  mIsContextMenu = aIsContextMenu;
+  mAdjustOffsetForContextMenu = aIsContextMenu;
+  mAnchorType = MenuPopupAnchorType_Point;
+}
+
+void
+nsMenuPopupFrame::InitializePopupAtRect(nsIContent* aTriggerContent,
+                                        const nsAString& aPosition,
+                                        const nsIntRect& aRect,
+                                        bool aAttributesOverride)
+{
+  InitializePopup(nullptr, aTriggerContent, aPosition, 0, 0,
+                  MenuPopupAnchorType_Rect, aAttributesOverride);
+  mScreenRect = aRect;
+}
+
+void
+nsMenuPopupFrame::InitializePopupWithAnchorAlign(nsIContent* aAnchorContent,
+                                                 nsAString& aAnchor,
+                                                 nsAString& aAlign,
+                                                 int32_t aXPos, int32_t aYPos)
+{
+  EnsureWidget();
+
+  mPopupState = ePopupShowing;
+  mAdjustOffsetForContextMenu = false;
+  mFlip = FlipType_Default;
+
+  // this popup opening function is provided for backwards compatibility
+  // only. It accepts either coordinates or an anchor and alignment value
+  // but doesn't use both together.
+  if (aXPos == -1 && aYPos == -1) {
+    mAnchorContent = aAnchorContent;
+    mAnchorType = MenuPopupAnchorType_Node;
+    mScreenRect = nsIntRect(-1, -1, 0, 0);
+    mXPos = 0;
+    mYPos = 0;
+    InitPositionFromAnchorAlign(aAnchor, aAlign);
+  }
+  else {
+    mAnchorContent = nullptr;
+    mAnchorType = MenuPopupAnchorType_Point;
+    mPopupAnchor = POPUPALIGNMENT_NONE;
+    mPopupAlignment = POPUPALIGNMENT_NONE;
+    mPosition = POPUPPOSITION_UNKNOWN;
+    mScreenRect = nsIntRect(aXPos, aYPos, 0, 0);
+    mXPos = aXPos;
+    mYPos = aYPos;
+  }
+}
+
+void
+nsMenuPopupFrame::ShowPopup(bool aIsContextMenu)
+{
+  mIsContextMenu = aIsContextMenu;
+
+  InvalidateFrameSubtree();
+
+  if (mPopupState == ePopupShowing || mPopupState == ePopupPositioning) {
+    mPopupState = ePopupOpening;
+    mIsOpenChanged = true;
+
+    // Clear mouse capture when a popup is opened.
+    if (mPopupType == ePopupTypeMenu) {
+      EventStateManager* activeESM =
+        static_cast<EventStateManager*>(
+          EventStateManager::GetActiveEventStateManager());
+      if (activeESM) {
+        EventStateManager::ClearGlobalActiveContent(activeESM);
+      }
+
+      nsIPresShell::SetCapturingContent(nullptr, 0);
+    }
+
+    nsMenuFrame* menuFrame = do_QueryFrame(GetParent());
+    if (menuFrame) {
+      nsWeakFrame weakFrame(this);
+      menuFrame->PopupOpened();
+      if (!weakFrame.IsAlive())
+        return;
+    }
+
+    // do we need an actual reflow here?
+    // is SetPopupPosition all that is needed?
+    PresContext()->PresShell()->FrameNeedsReflow(this, nsIPresShell::eTreeChange,
+                                                 NS_FRAME_HAS_DIRTY_CHILDREN);
+
+    if (mPopupType == ePopupTypeMenu) {
+      nsCOMPtr<nsISound> sound(do_CreateInstance("@mozilla.org/sound;1"));
+      if (sound)
+        sound->PlayEventSound(nsISound::EVENT_MENU_POPUP);
+    }
+  }
+
+  mShouldAutoPosition = true;
+}
+
+void
+nsMenuPopupFrame::HidePopup(bool aDeselectMenu, nsPopupState aNewState)
+{
+  NS_ASSERTION(aNewState == ePopupClosed || aNewState == ePopupInvisible,
+               "popup being set to unexpected state");
+
+  ClearPopupShownDispatcher();
+
+  // don't hide the popup when it isn't open
+  if (mPopupState == ePopupClosed || mPopupState == ePopupShowing ||
+      mPopupState == ePopupPositioning)
+    return;
+
+  // clear the trigger content if the popup is being closed. But don't clear
+  // it if the popup is just being made invisible as a popuphiding or command
+  // event may want to retrieve it.
+  if (aNewState == ePopupClosed) {
+    // if the popup had a trigger node set, clear the global window popup node
+    // as well
+    if (mTriggerContent) {
+      nsIDocument* doc = mContent->GetUncomposedDoc();
+      if (doc) {
+        if (nsPIDOMWindowOuter* win = doc->GetWindow()) {
+          nsCOMPtr<nsPIWindowRoot> root = win->GetTopWindowRoot();
+          if (root) {
+            root->SetPopupNode(nullptr);
+          }
+        }
+      }
+    }
+    mTriggerContent = nullptr;
+    mAnchorContent = nullptr;
+  }
+
+  // when invisible and about to be closed, HidePopup has already been called,
+  // so just set the new state to closed and return
+  if (mPopupState == ePopupInvisible) {
+    if (aNewState == ePopupClosed)
+      mPopupState = ePopupClosed;
+    return;
+  }
+
+  mPopupState = aNewState;
+
+  if (IsMenu())
+    SetCurrentMenuItem(nullptr);
+
+  mIncrementalString.Truncate();
+
+  LockMenuUntilClosed(false);
+
+  mIsOpenChanged = false;
+  mCurrentMenu = nullptr; // make sure no current menu is set
+  mHFlip = mVFlip = false;
+
+  nsView* view = GetView();
+  nsViewManager* viewManager = view->GetViewManager();
+  viewManager->SetViewVisibility(view, nsViewVisibility_kHide);
+
+  FireDOMEvent(NS_LITERAL_STRING("DOMMenuInactive"), mContent);
+
+  // XXX, bug 137033, In Windows, if mouse is outside the window when the menupopup closes, no
+  // mouse_enter/mouse_exit event will be fired to clear current hover state, we should clear it manually.
+  // This code may not the best solution, but we can leave it here until we find the better approach.
+  NS_ASSERTION(mContent->IsElement(), "How do we have a non-element?");
+  EventStates state = mContent->AsElement()->State();
+
+  if (state.HasState(NS_EVENT_STATE_HOVER)) {
+    EventStateManager* esm = PresContext()->EventStateManager();
+    esm->SetContentState(nullptr, NS_EVENT_STATE_HOVER);
+  }
+
+  nsMenuFrame* menuFrame = do_QueryFrame(GetParent());
+  if (menuFrame) {
+    menuFrame->PopupClosed(aDeselectMenu);
+  }
+}
+
+uint32_t
+nsMenuPopupFrame::GetXULLayoutFlags()
+{
+  return NS_FRAME_NO_SIZE_VIEW | NS_FRAME_NO_MOVE_VIEW | NS_FRAME_NO_VISIBILITY;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// GetRootViewForPopup
+//   Retrieves the view for the popup widget that contains the given frame. 
+//   If the given frame is not contained by a popup widget, return the
+//   root view of the root viewmanager.
+nsView*
+nsMenuPopupFrame::GetRootViewForPopup(nsIFrame* aStartFrame)
+{
+  nsView* view = aStartFrame->GetClosestView();
+  NS_ASSERTION(view, "frame must have a closest view!");
+  while (view) {
+    // Walk up the view hierarchy looking for a view whose widget has a 
+    // window type of eWindowType_popup - in other words a popup window
+    // widget. If we find one, this is the view we want. 
+    nsIWidget* widget = view->GetWidget();
+    if (widget && widget->WindowType() == eWindowType_popup) {
+      return view;
+    }
+
+    nsView* temp = view->GetParent();
+    if (!temp) {
+      // Otherwise, we've walked all the way up to the root view and not
+      // found a view for a popup window widget. Just return the root view.
+      return view;
+    }
+    view = temp;
+  }
+
+  return nullptr;
+}
+
+nsPoint
+nsMenuPopupFrame::AdjustPositionForAnchorAlign(nsRect& anchorRect,
+                                               FlipStyle& aHFlip, FlipStyle& aVFlip)
+{
+  // flip the anchor and alignment for right-to-left
+  int8_t popupAnchor(mPopupAnchor);
+  int8_t popupAlign(mPopupAlignment);
+  if (IsDirectionRTL()) {
+    // no need to flip the centered anchor types vertically
+    if (popupAnchor <= POPUPALIGNMENT_LEFTCENTER) {
+      popupAnchor = -popupAnchor;
+    }
+    popupAlign = -popupAlign;
+  }
+
+  nsRect originalAnchorRect(anchorRect);
+
+  // first, determine at which corner of the anchor the popup should appear
+  nsPoint pnt;
+  switch (popupAnchor) {
+    case POPUPALIGNMENT_LEFTCENTER:
+      pnt = nsPoint(anchorRect.x, anchorRect.y + anchorRect.height / 2);
+      anchorRect.y = pnt.y;
+      anchorRect.height = 0;
+      break;
+    case POPUPALIGNMENT_RIGHTCENTER:
+      pnt = nsPoint(anchorRect.XMost(), anchorRect.y + anchorRect.height / 2);
+      anchorRect.y = pnt.y;
+      anchorRect.height = 0;
+      break;
+    case POPUPALIGNMENT_TOPCENTER:
+      pnt = nsPoint(anchorRect.x + anchorRect.width / 2, anchorRect.y);
+      anchorRect.x = pnt.x;
+      anchorRect.width = 0;
+      break;
+    case POPUPALIGNMENT_BOTTOMCENTER:
+      pnt = nsPoint(anchorRect.x + anchorRect.width / 2, anchorRect.YMost());
+      anchorRect.x = pnt.x;
+      anchorRect.width = 0;
+      break;
+    case POPUPALIGNMENT_TOPRIGHT:
+      pnt = anchorRect.TopRight();
+      break;
+    case POPUPALIGNMENT_BOTTOMLEFT:
+      pnt = anchorRect.BottomLeft();
+      break;
+    case POPUPALIGNMENT_BOTTOMRIGHT:
+      pnt = anchorRect.BottomRight();
+      break;
+    case POPUPALIGNMENT_TOPLEFT:
+    default:
+      pnt = anchorRect.TopLeft();
+      break;
+  }
+
+  // If the alignment is on the right edge of the popup, move the popup left
+  // by the width. Similarly, if the alignment is on the bottom edge of the
+  // popup, move the popup up by the height. In addition, account for the
+  // margins of the popup on the edge on which it is aligned.
+  nsMargin margin(0, 0, 0, 0);
+  StyleMargin()->GetMargin(margin);
+  switch (popupAlign) {
+    case POPUPALIGNMENT_TOPRIGHT:
+      pnt.MoveBy(-mRect.width - margin.right, margin.top);
+      break;
+    case POPUPALIGNMENT_BOTTOMLEFT:
+      pnt.MoveBy(margin.left, -mRect.height - margin.bottom);
+      break;
+    case POPUPALIGNMENT_BOTTOMRIGHT:
+      pnt.MoveBy(-mRect.width - margin.right, -mRect.height - margin.bottom);
+      break;
+    case POPUPALIGNMENT_TOPLEFT:
+    default:
+      pnt.MoveBy(margin.left, margin.top);
+      break;
+  }
+
+  // If we aligning to the selected item in the popup, adjust the vertical
+  // position by the height of the menulist label and the selected item's
+  // position.
+  if (mPosition == POPUPPOSITION_SELECTION) {
+    MOZ_ASSERT(popupAnchor == POPUPALIGNMENT_BOTTOMLEFT ||
+              popupAnchor == POPUPALIGNMENT_BOTTOMRIGHT);
+    MOZ_ASSERT(popupAlign == POPUPALIGNMENT_TOPLEFT ||
+               popupAlign == POPUPALIGNMENT_TOPRIGHT);
+
+    nsIFrame* selectedItemFrame = GetSelectedItemForAlignment();
+    if (selectedItemFrame) {
+      pnt.y -= originalAnchorRect.height + selectedItemFrame->GetRect().y;
+    }
+  }
+
+  // Flipping horizontally is allowed as long as the popup is above or below
+  // the anchor. This will happen if both the anchor and alignment are top or
+  // both are bottom, but different values. Similarly, flipping vertically is
+  // allowed if the popup is to the left or right of the anchor. In this case,
+  // the values of the constants are such that both must be positive or both
+  // must be negative. A special case, used for overlap, allows flipping
+  // vertically as well.
+  // If we are flipping in both directions, we want to set a flip style both
+  // horizontally and vertically. However, we want to flip on the inside edge
+  // of the anchor. Consider the example of a typical dropdown menu.
+  // Vertically, we flip the popup on the outside edges of the anchor menu,
+  // however horizontally, we want to to use the inside edges so the popup
+  // still appears underneath the anchor menu instead of floating off the
+  // side of the menu.
+  switch (popupAnchor) {
+    case POPUPALIGNMENT_LEFTCENTER:
+    case POPUPALIGNMENT_RIGHTCENTER:
+      aHFlip = FlipStyle_Outside;
+      aVFlip = FlipStyle_Inside;
+      break;
+    case POPUPALIGNMENT_TOPCENTER:
+    case POPUPALIGNMENT_BOTTOMCENTER:
+      aHFlip = FlipStyle_Inside;
+      aVFlip = FlipStyle_Outside;
+      break;
+    default:
+    {
+      FlipStyle anchorEdge = mFlip == FlipType_Both ? FlipStyle_Inside : FlipStyle_None;
+      aHFlip = (popupAnchor == -popupAlign) ? FlipStyle_Outside : anchorEdge;
+      if (((popupAnchor > 0) == (popupAlign > 0)) ||
+          (popupAnchor == POPUPALIGNMENT_TOPLEFT && popupAlign == POPUPALIGNMENT_TOPLEFT))
+        aVFlip = FlipStyle_Outside;
+      else
+        aVFlip = anchorEdge;
+      break;
+    }
+  }
+
+  return pnt;
+}
+
+nsIFrame* nsMenuPopupFrame::GetSelectedItemForAlignment()
+{
+  // This method adjusts a menulist's popup such that the selected item is under the cursor, aligned
+  // with the menulist label.
+  nsCOMPtr<nsIDOMXULSelectControlElement> select = do_QueryInterface(mAnchorContent);
+  if (!select) {
+    // If there isn't an anchor, then try just getting the parent of the popup.
+    select = do_QueryInterface(mContent->GetParent());
+    if (!select) {
+      return nullptr;
+    }
+  }
+
+  nsCOMPtr<nsIDOMXULSelectControlItemElement> item;
+  select->GetSelectedItem(getter_AddRefs(item));
+
+  nsCOMPtr<nsIContent> selectedElement = do_QueryInterface(item);
+  return selectedElement ? selectedElement->GetPrimaryFrame() : nullptr;
+}
+
+nscoord
+nsMenuPopupFrame::SlideOrResize(nscoord& aScreenPoint, nscoord aSize,
+                               nscoord aScreenBegin, nscoord aScreenEnd,
+                               nscoord *aOffset)
+{
+  // The popup may be positioned such that either the left/top or bottom/right
+  // is outside the screen - but never both.
+  nscoord newPos =
+    std::max(aScreenBegin, std::min(aScreenEnd - aSize, aScreenPoint));
+  *aOffset = newPos - aScreenPoint;
+  aScreenPoint = newPos;
+  return std::min(aSize, aScreenEnd - aScreenPoint);
+}
+
+nscoord
+nsMenuPopupFrame::FlipOrResize(nscoord& aScreenPoint, nscoord aSize, 
+                               nscoord aScreenBegin, nscoord aScreenEnd,
+                               nscoord aAnchorBegin, nscoord aAnchorEnd,
+                               nscoord aMarginBegin, nscoord aMarginEnd,
+                               nscoord aOffsetForContextMenu, FlipStyle aFlip,
+                               bool aEndAligned, bool* aFlipSide)
+{
+  // The flip side argument will be set to true if there wasn't room and we
+  // flipped to the opposite side.
+  *aFlipSide = false;
+
+  // all of the coordinates used here are in app units relative to the screen
+  nscoord popupSize = aSize;
+  if (aScreenPoint < aScreenBegin) {
+    // at its current position, the popup would extend past the left or top
+    // edge of the screen, so it will have to be moved or resized.
+    if (aFlip) {
+      // for inside flips, we flip on the opposite side of the anchor
+      nscoord startpos = aFlip == FlipStyle_Outside ? aAnchorBegin : aAnchorEnd;
+      nscoord endpos = aFlip == FlipStyle_Outside ? aAnchorEnd : aAnchorBegin;
+
+      // check whether there is more room to the left and right (or top and
+      // bottom) of the anchor and put the popup on the side with more room.
+      if (startpos - aScreenBegin >= aScreenEnd - endpos) {
+        aScreenPoint = aScreenBegin;
+        popupSize = startpos - aScreenPoint - aMarginEnd;
+        *aFlipSide = !aEndAligned;
+      }
+      else {
+        // If the newly calculated position is different than the existing
+        // position, flip such that the popup is to the right or bottom of the
+        // anchor point instead . However, when flipping use the same margin
+        // size.
+        nscoord newScreenPoint = endpos + aMarginEnd;
+        if (newScreenPoint != aScreenPoint) {
+          *aFlipSide = aEndAligned;
+          aScreenPoint = newScreenPoint;
+          // check if the new position is still off the right or bottom edge of
+          // the screen. If so, resize the popup.
+          if (aScreenPoint + aSize > aScreenEnd) {
+            popupSize = aScreenEnd - aScreenPoint;
+          }
+        }
+      }
+    }
+    else {
+      aScreenPoint = aScreenBegin;
+    }
+  }
+  else if (aScreenPoint + aSize > aScreenEnd) {
+    // at its current position, the popup would extend past the right or
+    // bottom edge of the screen, so it will have to be moved or resized.
+    if (aFlip) {
+      // for inside flips, we flip on the opposite side of the anchor
+      nscoord startpos = aFlip == FlipStyle_Outside ? aAnchorBegin : aAnchorEnd;
+      nscoord endpos = aFlip == FlipStyle_Outside ? aAnchorEnd : aAnchorBegin;
+
+      // check whether there is more room to the left and right (or top and
+      // bottom) of the anchor and put the popup on the side with more room.
+      if (aScreenEnd - endpos >= startpos - aScreenBegin) {
+        *aFlipSide = aEndAligned;
+        if (mIsContextMenu) {
+          aScreenPoint = aScreenEnd - aSize;
+        }
+        else {
+          aScreenPoint = endpos + aMarginBegin;
+          popupSize = aScreenEnd - aScreenPoint;
+        }
+      }
+      else {
+        // if the newly calculated position is different than the existing
+        // position, we flip such that the popup is to the left or top of the
+        // anchor point instead.
+        nscoord newScreenPoint = startpos - aSize - aMarginBegin - std::max(aOffsetForContextMenu, 0);
+        if (newScreenPoint != aScreenPoint) {
+          *aFlipSide = !aEndAligned;
+          aScreenPoint = newScreenPoint;
+
+          // check if the new position is still off the left or top edge of the
+          // screen. If so, resize the popup.
+          if (aScreenPoint < aScreenBegin) {
+            aScreenPoint = aScreenBegin;
+            if (!mIsContextMenu) {
+              popupSize = startpos - aScreenPoint - aMarginBegin;
+            }
+          }
+        }
+      }
+    }
+    else {
+      aScreenPoint = aScreenEnd - aSize;
+    }
+  }
+
+  // Make sure that the point is within the screen boundaries and that the
+  // size isn't off the edge of the screen. This can happen when a large
+  // positive or negative margin is used.
+  if (aScreenPoint < aScreenBegin) {
+    aScreenPoint = aScreenBegin;
+  }
+  if (aScreenPoint > aScreenEnd) {
+    aScreenPoint = aScreenEnd - aSize;
+  }
+
+  // If popupSize ended up being negative, or the original size was actually
+  // smaller than the calculated popup size, just use the original size instead.
+  if (popupSize <= 0 || aSize < popupSize) {
+    popupSize = aSize;
+  }
+  return std::min(popupSize, aScreenEnd - aScreenPoint);
+}
+
+nsresult
+nsMenuPopupFrame::SetPopupPosition(nsIFrame* aAnchorFrame, bool aIsMove, bool aSizedToPopup, bool aNotify)
+{
+  if (!mShouldAutoPosition)
+    return NS_OK;
+
+  // If this is due to a move, return early if the popup hasn't been laid out
+  // yet. On Windows, this can happen when using a drag popup before it opens.
+  if (aIsMove && (mPrefSize.width == -1 || mPrefSize.height == -1)) {
+    return NS_OK;
+  }
+
+  nsPresContext* presContext = PresContext();
+  nsIFrame* rootFrame = presContext->PresShell()->FrameManager()->GetRootFrame();
+  NS_ASSERTION(rootFrame->GetView() && GetView() &&
+               rootFrame->GetView() == GetView()->GetParent(),
+               "rootFrame's view is not our view's parent???");
+
+  // For anchored popups, the anchor rectangle. For non-anchored popups, the
+  // size will be 0.
+  nsRect anchorRect;
+
+  // Width of the parent, used when aSizedToPopup is true.
+  int32_t parentWidth = 0;
+
+  bool anchored = IsAnchored();
+  if (anchored || aSizedToPopup) {
+    // In order to deal with transforms, we need the root prescontext:
+    nsPresContext* rootPresContext = presContext->GetRootPresContext();
+
+    // If we can't reach a root pres context, don't bother continuing:
+    if (!rootPresContext) {
+      return NS_OK;
+    }
+
+    // If anchored to a rectangle, use that rectangle. Otherwise, determine the
+    // rectangle from the anchor.
+    if (mAnchorType == MenuPopupAnchorType_Rect) {
+      anchorRect = ToAppUnits(mScreenRect, presContext->AppUnitsPerCSSPixel());
+    }
+    else {
+      // if the frame is not specified, use the anchor node passed to OpenPopup. If
+      // that wasn't specified either, use the root frame. Note that mAnchorContent
+      // might be a different document so its presshell must be used.
+      if (!aAnchorFrame) {
+        if (mAnchorContent) {
+          aAnchorFrame = mAnchorContent->GetPrimaryFrame();
+        }
+
+        if (!aAnchorFrame) {
+          aAnchorFrame = rootFrame;
+          if (!aAnchorFrame)
+            return NS_OK;
+        }
+      }
+
+      // And then we need its root frame for a reference
+      nsIFrame* referenceFrame = rootPresContext->FrameManager()->GetRootFrame();
+
+      // the dimensions of the anchor
+      nsRect parentRect = aAnchorFrame->GetRectRelativeToSelf();
+      // Relative to the root
+      anchorRect = nsLayoutUtils::TransformFrameRectToAncestor(aAnchorFrame,
+                                                               parentRect,
+                                                               referenceFrame);
+      // Relative to the screen
+      anchorRect.MoveBy(referenceFrame->GetScreenRectInAppUnits().TopLeft());
+
+      // In its own app units
+      anchorRect =
+        anchorRect.ScaleToOtherAppUnitsRoundOut(rootPresContext->AppUnitsPerDevPixel(),
+                                                presContext->AppUnitsPerDevPixel());
+    }
+
+    // The width is needed when aSizedToPopup is true
+    parentWidth = anchorRect.width;
+  }
+
+  // Set the popup's size to the preferred size. Below, this size will be
+  // adjusted to fit on the screen or within the content area. If the anchor
+  // is sized to the popup, use the anchor's width instead of the preferred
+  // width. The preferred size should already be set by the parent frame.
+  NS_ASSERTION(mPrefSize.width >= 0 || mPrefSize.height >= 0,
+               "preferred size of popup not set");
+  mRect.width = aSizedToPopup ? parentWidth : mPrefSize.width;
+  mRect.height = mPrefSize.height;
+
+  // If we're anchoring to a rect, and the rect is smaller than the preferred size
+  // of the popup, change its width accordingly.
+  if (mAnchorType == MenuPopupAnchorType_Rect &&
+      parentWidth < mPrefSize.width) {
+    mRect.width = mPrefSize.width;
+  }
+
+  // the screen position in app units where the popup should appear
+  nsPoint screenPoint;
+
+  // indicators of whether the popup should be flipped or resized.
+  FlipStyle hFlip = FlipStyle_None, vFlip = FlipStyle_None;
+
+  nsMargin margin(0, 0, 0, 0);
+  StyleMargin()->GetMargin(margin);
+
+  // the screen rectangle of the root frame, in dev pixels.
+  nsRect rootScreenRect = rootFrame->GetScreenRectInAppUnits();
+
+  nsDeviceContext* devContext = presContext->DeviceContext();
+  nsPoint offsetForContextMenu;
+
+  bool isNoAutoHide = IsNoAutoHide();
+  nsPopupLevel popupLevel = PopupLevel(isNoAutoHide);
+
+  if (anchored) {
+    // if we are anchored, there are certain things we don't want to do when
+    // repositioning the popup to fit on the screen, such as end up positioned
+    // over the anchor, for instance a popup appearing over the menu label.
+    // When doing this reposition, we want to move the popup to the side with
+    // the most room. The combination of anchor and alignment dictate if we 
+    // readjust above/below or to the left/right.
+    if (mAnchorContent || mAnchorType == MenuPopupAnchorType_Rect) {
+      // move the popup according to the anchor and alignment. This will also
+      // tell us which axis the popup is flush against in case we have to move
+      // it around later. The AdjustPositionForAnchorAlign method accounts for
+      // the popup's margin.
+      screenPoint = AdjustPositionForAnchorAlign(anchorRect, hFlip, vFlip);
+    }
+    else {
+      // with no anchor, the popup is positioned relative to the root frame
+      anchorRect = rootScreenRect;
+      screenPoint = anchorRect.TopLeft() + nsPoint(margin.left, margin.top);
+    }
+
+    // mXPos and mYPos specify an additonal offset passed to OpenPopup that
+    // should be added to the position.  We also add the offset to the anchor
+    // pos so a later flip/resize takes the offset into account.
+    nscoord anchorXOffset = presContext->CSSPixelsToAppUnits(mXPos);
+    if (IsDirectionRTL()) {
+      screenPoint.x -= anchorXOffset;
+      anchorRect.x -= anchorXOffset;
+    } else {
+      screenPoint.x += anchorXOffset;
+      anchorRect.x += anchorXOffset;
+    }
+    nscoord anchorYOffset = presContext->CSSPixelsToAppUnits(mYPos);
+    screenPoint.y += anchorYOffset;
+    anchorRect.y += anchorYOffset;
+
+    // If this is a noautohide popup, set the screen coordinates of the popup.
+    // This way, the popup stays at the location where it was opened even when
+    // the window is moved. Popups at the parent level follow the parent
+    // window as it is moved and remained anchored, so we want to maintain the
+    // anchoring instead.
+    if (isNoAutoHide &&
+        (popupLevel != ePopupLevelParent || mAnchorType == MenuPopupAnchorType_Rect)) {
+      // Account for the margin that will end up being added to the screen coordinate
+      // the next time SetPopupPosition is called.
+      mAnchorType = MenuPopupAnchorType_Point;
+      mScreenRect.x = presContext->AppUnitsToIntCSSPixels(screenPoint.x - margin.left);
+      mScreenRect.y = presContext->AppUnitsToIntCSSPixels(screenPoint.y - margin.top);
+    }
+  }
+  else {
+    // The popup is positioned at a screen coordinate.
+    // First convert the screen position in mScreenRect from CSS pixels into
+    // device pixels, ignoring any zoom as mScreenRect holds unzoomed screen
+    // coordinates.
+    int32_t factor = devContext->AppUnitsPerDevPixelAtUnitFullZoom();
+
+    // Depending on the platform, context menus should be offset by varying amounts
+    // to ensure that they don't appear directly where the cursor is. Otherwise,
+    // it is too easy to have the context menu close up again.
+    if (mAdjustOffsetForContextMenu) {
+      nsPoint offsetForContextMenuDev;
+      offsetForContextMenuDev.x = nsPresContext::CSSPixelsToAppUnits(LookAndFeel::GetInt(
+                                    LookAndFeel::eIntID_ContextMenuOffsetHorizontal)) / factor;
+      offsetForContextMenuDev.y = nsPresContext::CSSPixelsToAppUnits(LookAndFeel::GetInt(
+                                    LookAndFeel::eIntID_ContextMenuOffsetVertical)) / factor;
+      offsetForContextMenu.x = presContext->DevPixelsToAppUnits(offsetForContextMenuDev.x);
+      offsetForContextMenu.y = presContext->DevPixelsToAppUnits(offsetForContextMenuDev.y);
+    }
+
+    // next, convert into app units accounting for the zoom
+    screenPoint.x = presContext->DevPixelsToAppUnits(
+                      nsPresContext::CSSPixelsToAppUnits(mScreenRect.x) / factor);
+    screenPoint.y = presContext->DevPixelsToAppUnits(
+                      nsPresContext::CSSPixelsToAppUnits(mScreenRect.y) / factor);
+    anchorRect = nsRect(screenPoint, nsSize(0, 0));
+
+    // add the margins on the popup
+    screenPoint.MoveBy(margin.left + offsetForContextMenu.x,
+                       margin.top + offsetForContextMenu.y);
+
+#ifdef XP_MACOSX
+    // OSX tooltips follow standard flip rule but other popups flip horizontally not vertically
+    if (mPopupType == ePopupTypeTooltip) {
+        vFlip = FlipStyle_Outside;
+    } else {
+        hFlip = FlipStyle_Outside;
+    }
+#else
+    // Other OS screen positioned popups can be flipped vertically but never horizontally
+    vFlip = FlipStyle_Outside;
+#endif // #ifdef XP_MACOSX
+  }
+
+  // If a panel is being moved or has flip="none", don't constrain or flip it. But always do this for
+  // content shells, so that the popup doesn't extend outside the containing frame.
+  if (mInContentShell || (mFlip != FlipType_None &&
+                          (!aIsMove || mPopupType != ePopupTypePanel))) {
+    int32_t appPerDev = presContext->AppUnitsPerDevPixel();
+    LayoutDeviceIntRect anchorRectDevPix =
+      LayoutDeviceIntRect::FromAppUnitsToNearest(anchorRect, appPerDev);
+    LayoutDeviceIntRect rootScreenRectDevPix =
+      LayoutDeviceIntRect::FromAppUnitsToNearest(rootScreenRect, appPerDev);
+    LayoutDeviceIntRect screenRectDevPix =
+      GetConstraintRect(anchorRectDevPix, rootScreenRectDevPix, popupLevel);
+    nsRect screenRect =
+      LayoutDeviceIntRect::ToAppUnits(screenRectDevPix, appPerDev);
+
+    // Ensure that anchorRect is on screen.
+    anchorRect = anchorRect.Intersect(screenRect);
+
+    // shrink the the popup down if it is larger than the screen size
+    if (mRect.width > screenRect.width)
+      mRect.width = screenRect.width;
+    if (mRect.height > screenRect.height)
+      mRect.height = screenRect.height;
+
+    // at this point the anchor (anchorRect) is within the available screen
+    // area (screenRect) and the popup is known to be no larger than the screen.
+
+    // We might want to "slide" an arrow if the panel is of the correct type -
+    // but we can only slide on one axis - the other axis must be "flipped or
+    // resized" as normal.
+    bool slideHorizontal = false, slideVertical = false;
+    if (mFlip == FlipType_Slide) {
+      int8_t position = GetAlignmentPosition();
+      slideHorizontal = position >= POPUPPOSITION_BEFORESTART &&
+                        position <= POPUPPOSITION_AFTEREND;
+      slideVertical = position >= POPUPPOSITION_STARTBEFORE &&
+                      position <= POPUPPOSITION_ENDAFTER;
+    }
+
+    // Next, check if there is enough space to show the popup at full size when
+    // positioned at screenPoint. If not, flip the popups to the opposite side
+    // of their anchor point, or resize them as necessary.
+    bool endAligned = IsDirectionRTL() ?
+      mPopupAlignment == POPUPALIGNMENT_TOPLEFT || mPopupAlignment == POPUPALIGNMENT_BOTTOMLEFT :
+      mPopupAlignment == POPUPALIGNMENT_TOPRIGHT || mPopupAlignment == POPUPALIGNMENT_BOTTOMRIGHT;
+    if (slideHorizontal) {
+      mRect.width = SlideOrResize(screenPoint.x, mRect.width, screenRect.x,
+                                  screenRect.XMost(), &mAlignmentOffset);
+    } else {
+      mRect.width = FlipOrResize(screenPoint.x, mRect.width, screenRect.x,
+                                 screenRect.XMost(), anchorRect.x, anchorRect.XMost(),
+                                 margin.left, margin.right, offsetForContextMenu.x, hFlip,
+                                 endAligned, &mHFlip);
+    }
+
+    endAligned = mPopupAlignment == POPUPALIGNMENT_BOTTOMLEFT ||
+                 mPopupAlignment == POPUPALIGNMENT_BOTTOMRIGHT;
+    if (slideVertical) {
+      mRect.height = SlideOrResize(screenPoint.y, mRect.height, screenRect.y,
+                                  screenRect.YMost(), &mAlignmentOffset);
+    } else {
+      mRect.height = FlipOrResize(screenPoint.y, mRect.height, screenRect.y,
+                                  screenRect.YMost(), anchorRect.y, anchorRect.YMost(),
+                                  margin.top, margin.bottom, offsetForContextMenu.y, vFlip,
+                                  endAligned, &mVFlip);
+    }
+
+    NS_ASSERTION(screenPoint.x >= screenRect.x && screenPoint.y >= screenRect.y &&
+                 screenPoint.x + mRect.width <= screenRect.XMost() &&
+                 screenPoint.y + mRect.height <= screenRect.YMost(),
+                 "Popup is offscreen");
+  }
+
+  // snap the popup's position in screen coordinates to device pixels,
+  // see bug 622507, bug 961431
+  screenPoint.x = presContext->RoundAppUnitsToNearestDevPixels(screenPoint.x);
+  screenPoint.y = presContext->RoundAppUnitsToNearestDevPixels(screenPoint.y);
+
+  // determine the x and y position of the view by subtracting the desired
+  // screen position from the screen position of the root frame.
+  nsPoint viewPoint = screenPoint - rootScreenRect.TopLeft();
+
+  nsView* view = GetView();
+  NS_ASSERTION(view, "popup with no view");
+
+  // Offset the position by the width and height of the borders and titlebar.
+  // Even though GetClientOffset should return (0, 0) when there is no
+  // titlebar or borders, we skip these calculations anyway for non-panels
+  // to save time since they will never have a titlebar.
+  nsIWidget* widget = view->GetWidget();
+  if (mPopupType == ePopupTypePanel && widget) {
+    mLastClientOffset = widget->GetClientOffset();
+    viewPoint.x += presContext->DevPixelsToAppUnits(mLastClientOffset.x);
+    viewPoint.y += presContext->DevPixelsToAppUnits(mLastClientOffset.y);
+  }
+
+  presContext->GetPresShell()->GetViewManager()->
+    MoveViewTo(view, viewPoint.x, viewPoint.y);
+
+  // Now that we've positioned the view, sync up the frame's origin.
+  nsBoxFrame::SetPosition(viewPoint - GetParent()->GetOffsetTo(rootFrame));
+
+  if (aSizedToPopup) {
+    nsBoxLayoutState state(PresContext());
+    // XXXndeakin can parentSize.width still extend outside?
+    SetXULBounds(state, mRect);
+  }
+
+  // If the popup is in the positioned state or if it is shown and the position
+  // or size changed, dispatch a popuppositioned event if the popup wants it.
+  nsIntRect newRect(screenPoint.x, screenPoint.y, mRect.width, mRect.height);
+  if (mPopupState == ePopupPositioning ||
+      (mPopupState == ePopupShown && !newRect.IsEqualEdges(mUsedScreenRect))) {
+    mUsedScreenRect = newRect;
+    if (aNotify) {
+      nsXULPopupPositionedEvent::DispatchIfNeeded(mContent, false, false);
+    }
+  }
+
+  return NS_OK;
+}
+
+/* virtual */ nsMenuFrame*
+nsMenuPopupFrame::GetCurrentMenuItem()
+{
+  return mCurrentMenu;
+}
+
+LayoutDeviceIntRect
+nsMenuPopupFrame::GetConstraintRect(const LayoutDeviceIntRect& aAnchorRect,
+                                    const LayoutDeviceIntRect& aRootScreenRect,
+                                    nsPopupLevel aPopupLevel)
+{
+  LayoutDeviceIntRect screenRectPixels;
+
+  // determine the available screen space. It will be reduced by the OS chrome
+  // such as menubars. It addition, for content shells, it will be the area of
+  // the content rather than the screen.
+  nsCOMPtr<nsIScreen> screen;
+  nsCOMPtr<nsIScreenManager> sm(do_GetService("@mozilla.org/gfx/screenmanager;1"));
+  if (sm) {
+    // for content shells, get the screen where the root frame is located.
+    // This is because we need to constrain the content to this content area,
+    // so we should use the same screen. Otherwise, use the screen where the
+    // anchor is located.
+    DesktopToLayoutDeviceScale scale =
+      PresContext()->DeviceContext()->GetDesktopToDeviceScale();
+    DesktopRect rect =
+      (mInContentShell ? aRootScreenRect : aAnchorRect) / scale;
+    int32_t width = std::max(1, NSToIntRound(rect.width));
+    int32_t height = std::max(1, NSToIntRound(rect.height));
+    sm->ScreenForRect(rect.x, rect.y, width, height, getter_AddRefs(screen));
+    if (screen) {
+      // Non-top-level popups (which will always be panels)
+      // should never overlap the OS bar:
+      bool dontOverlapOSBar = aPopupLevel != ePopupLevelTop;
+      // get the total screen area if the popup is allowed to overlap it.
+      if (!dontOverlapOSBar && mMenuCanOverlapOSBar && !mInContentShell)
+        screen->GetRect(&screenRectPixels.x, &screenRectPixels.y,
+          &screenRectPixels.width, &screenRectPixels.height);
+      else
+        screen->GetAvailRect(&screenRectPixels.x, &screenRectPixels.y,
+          &screenRectPixels.width, &screenRectPixels.height);
+    }
+  }
+
+  if (mInContentShell) {
+    // for content shells, clip to the client area rather than the screen area
+    screenRectPixels.IntersectRect(screenRectPixels, aRootScreenRect);
+  }
+  else if (!mOverrideConstraintRect.IsEmpty()) {
+    LayoutDeviceIntRect overrideConstrainRect =
+      LayoutDeviceIntRect::FromAppUnitsToNearest(mOverrideConstraintRect,
+                                                 PresContext()->AppUnitsPerDevPixel());
+    // This is currently only used for <select> elements where we want to constrain
+    // vertically to the screen but not horizontally, so do the intersection and then
+    // reset the horizontal values.
+    screenRectPixels.IntersectRect(screenRectPixels, overrideConstrainRect);
+    screenRectPixels.x = overrideConstrainRect.x;
+    screenRectPixels.width = overrideConstrainRect.width;
+  }
+
+  return screenRectPixels;
+}
+
+void nsMenuPopupFrame::CanAdjustEdges(int8_t aHorizontalSide,
+                                      int8_t aVerticalSide,
+                                      LayoutDeviceIntPoint& aChange)
+{
+  int8_t popupAlign(mPopupAlignment);
+  if (IsDirectionRTL()) {
+    popupAlign = -popupAlign;
+  }
+
+  if (aHorizontalSide == (mHFlip ? NS_SIDE_RIGHT : NS_SIDE_LEFT)) {
+    if (popupAlign == POPUPALIGNMENT_TOPLEFT || popupAlign == POPUPALIGNMENT_BOTTOMLEFT) {
+      aChange.x = 0;
+    }
+  }
+  else if (aHorizontalSide == (mHFlip ? NS_SIDE_LEFT : NS_SIDE_RIGHT)) {
+    if (popupAlign == POPUPALIGNMENT_TOPRIGHT || popupAlign == POPUPALIGNMENT_BOTTOMRIGHT) {
+      aChange.x = 0;
+    }
+  }
+
+  if (aVerticalSide == (mVFlip ? NS_SIDE_BOTTOM : NS_SIDE_TOP)) {
+    if (popupAlign == POPUPALIGNMENT_TOPLEFT || popupAlign == POPUPALIGNMENT_TOPRIGHT) {
+      aChange.y = 0;
+    }
+  }
+  else if (aVerticalSide == (mVFlip ? NS_SIDE_TOP : NS_SIDE_BOTTOM)) {
+    if (popupAlign == POPUPALIGNMENT_BOTTOMLEFT || popupAlign == POPUPALIGNMENT_BOTTOMRIGHT) {
+      aChange.y = 0;
+    }
+  }
+}
+
+ConsumeOutsideClicksResult nsMenuPopupFrame::ConsumeOutsideClicks()
+{
+  // If the popup has explicitly set a consume mode, honor that.
+  if (mConsumeRollupEvent != PopupBoxObject::ROLLUP_DEFAULT) {
+    return (mConsumeRollupEvent == PopupBoxObject::ROLLUP_CONSUME) ?
+           ConsumeOutsideClicks_True : ConsumeOutsideClicks_ParentOnly;
+  }
+
+  if (mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::consumeoutsideclicks,
+                            nsGkAtoms::_true, eCaseMatters)) {
+    return ConsumeOutsideClicks_True;
+  }
+  if (mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::consumeoutsideclicks,
+                            nsGkAtoms::_false, eCaseMatters)) {
+    return ConsumeOutsideClicks_ParentOnly;
+  }
+  if (mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::consumeoutsideclicks,
+                            nsGkAtoms::never, eCaseMatters)) {
+    return ConsumeOutsideClicks_Never;
+  }
+
+  nsCOMPtr<nsIContent> parentContent = mContent->GetParent();
+  if (parentContent) {
+    dom::NodeInfo *ni = parentContent->NodeInfo();
+    if (ni->Equals(nsGkAtoms::menulist, kNameSpaceID_XUL)) {
+      return ConsumeOutsideClicks_True;  // Consume outside clicks for combo boxes on all platforms
+    }
+#if defined(XP_WIN)
+    // Don't consume outside clicks for menus in Windows
+    if (ni->Equals(nsGkAtoms::menu, kNameSpaceID_XUL) ||
+        ni->Equals(nsGkAtoms::splitmenu, kNameSpaceID_XUL) ||
+        ni->Equals(nsGkAtoms::popupset, kNameSpaceID_XUL) ||
+        ((ni->Equals(nsGkAtoms::button, kNameSpaceID_XUL) ||
+          ni->Equals(nsGkAtoms::toolbarbutton, kNameSpaceID_XUL)) &&
+         (parentContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
+                                     nsGkAtoms::menu, eCaseMatters) ||
+          parentContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
+                                     nsGkAtoms::menuButton, eCaseMatters)))) {
+      return ConsumeOutsideClicks_Never;
+    }
+#endif
+    if (ni->Equals(nsGkAtoms::textbox, kNameSpaceID_XUL)) {
+      // Don't consume outside clicks for autocomplete widget
+      if (parentContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
+                                     nsGkAtoms::autocomplete, eCaseMatters)) {
+        return ConsumeOutsideClicks_Never;
+      }
+    }
+  }
+
+  return ConsumeOutsideClicks_True;
+}
+
+// XXXroc this is megalame. Fossicking around for a frame of the right
+// type is a recipe for disaster in the long term.
+nsIScrollableFrame* nsMenuPopupFrame::GetScrollFrame(nsIFrame* aStart)
+{
+  if (!aStart)
+    return nullptr;  
+
+  // try start frame and siblings
+  nsIFrame* currFrame = aStart;
+  do {
+    nsIScrollableFrame* sf = do_QueryFrame(currFrame);
+    if (sf)
+      return sf;
+    currFrame = currFrame->GetNextSibling();
+  } while (currFrame);
+
+  // try children
+  currFrame = aStart;
+  do {
+    nsIFrame* childFrame = currFrame->PrincipalChildList().FirstChild();
+    nsIScrollableFrame* sf = GetScrollFrame(childFrame);
+    if (sf)
+      return sf;
+    currFrame = currFrame->GetNextSibling();
+  } while (currFrame);
+
+  return nullptr;
+}
+
+void nsMenuPopupFrame::EnsureMenuItemIsVisible(nsMenuFrame* aMenuItem)
+{
+  if (aMenuItem) {
+    aMenuItem->PresContext()->PresShell()->ScrollFrameRectIntoView(
+      aMenuItem,
+      nsRect(nsPoint(0,0), aMenuItem->GetRect().Size()),
+      nsIPresShell::ScrollAxis(),
+      nsIPresShell::ScrollAxis(),
+      nsIPresShell::SCROLL_OVERFLOW_HIDDEN |
+      nsIPresShell::SCROLL_FIRST_ANCESTOR_ONLY);
+  }
+}
+
+void nsMenuPopupFrame::ChangeByPage(bool aIsUp)
+{
+  // Only scroll by page within menulists.
+  if (!IsMenuList()) {
+    return;
+  }
+
+  nsMenuFrame* newMenu = nullptr;
+  nsIFrame* currentMenu = mCurrentMenu;
+  if (!currentMenu) {
+    // If there is no current menu item, get the first item. When moving up,
+    // just use this as the newMenu and leave currentMenu null so that no
+    // check for a later element is performed. When moving down, set currentMenu
+    // so that we look for one page down from the first item.
+    newMenu = nsXULPopupManager::GetNextMenuItem(this, nullptr, true);
+    if (!aIsUp) {
+      currentMenu = newMenu;
+    }
+  }
+
+  if (currentMenu) {
+    nscoord scrollHeight = mRect.height;
+    nsIScrollableFrame *scrollframe = GetScrollFrame(this);
+    if (scrollframe) {
+      scrollHeight = scrollframe->GetScrollPortRect().height;
+    }
+
+    // Get the position of the current item and add or subtract one popup's
+    // height to or from it.
+    nscoord targetPosition = aIsUp ? currentMenu->GetRect().YMost() - scrollHeight :
+                                     currentMenu->GetRect().y + scrollHeight;
+
+    // Indicates that the last visible child was a valid menuitem.
+    bool lastWasValid = false;
+
+    // Look for the next child which is just past the target position. This child
+    // will need to be selected.
+    while (currentMenu) {
+      // Only consider menu frames.
+      nsMenuFrame* menuFrame = do_QueryFrame(currentMenu);
+      if (menuFrame &&
+          nsXULPopupManager::IsValidMenuItem(menuFrame->GetContent(), true)) {
+
+        // If the right position was found, break out. Otherwise, look for another item.
+        if ((!aIsUp && currentMenu->GetRect().YMost() > targetPosition) ||
+            (aIsUp && currentMenu->GetRect().y < targetPosition)) {
+
+          // If the last visible child was not a valid menuitem or was disabled,
+          // use this as the menu to select, skipping over any non-valid items at
+          // the edge of the page.
+          if (!lastWasValid) {
+            newMenu = menuFrame;
+          }
+
+          break;
+        }
+
+        // Assign this item to newMenu. This item will be selected in case we
+        // don't find any more. 
+        lastWasValid = true;
+        newMenu = menuFrame;
+      }
+      else {
+        lastWasValid = false;
+      }
+
+      currentMenu = aIsUp ? currentMenu->GetPrevSibling() :
+                            currentMenu->GetNextSibling();
+    }
+  }
+
+  // Select the new menuitem.
+  if (newMenu) {
+    ChangeMenuItem(newMenu, false, true);
+  }
+}
+
+NS_IMETHODIMP nsMenuPopupFrame::SetCurrentMenuItem(nsMenuFrame* aMenuItem)
+{
+  if (mCurrentMenu == aMenuItem)
+    return NS_OK;
+
+  if (mCurrentMenu) {
+    mCurrentMenu->SelectMenu(false);
+  }
+
+  if (aMenuItem) {
+    EnsureMenuItemIsVisible(aMenuItem);
+    aMenuItem->SelectMenu(true);
+  }
+
+  mCurrentMenu = aMenuItem;
+
+  return NS_OK;
+}
+
+void
+nsMenuPopupFrame::CurrentMenuIsBeingDestroyed()
+{
+  mCurrentMenu = nullptr;
+}
+
+NS_IMETHODIMP
+nsMenuPopupFrame::ChangeMenuItem(nsMenuFrame* aMenuItem,
+                                 bool aSelectFirstItem,
+                                 bool aFromKey)
+{
+  if (mCurrentMenu == aMenuItem)
+    return NS_OK;
+
+  // When a context menu is open, the current menu is locked, and no change
+  // to the menu is allowed.
+  nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
+  if (!mIsContextMenu && pm && pm->HasContextMenu(this))
+    return NS_OK;
+
+  // Unset the current child.
+  if (mCurrentMenu) {
+    mCurrentMenu->SelectMenu(false);
+    nsMenuPopupFrame* popup = mCurrentMenu->GetPopup();
+    if (popup) {
+      if (mCurrentMenu->IsOpen()) {
+        if (pm)
+          pm->HidePopupAfterDelay(popup);
+      }
+    }
+  }
+
+  // Set the new child.
+  if (aMenuItem) {
+    EnsureMenuItemIsVisible(aMenuItem);
+    aMenuItem->SelectMenu(true);
+
+    // On Windows, a menulist should update its value whenever navigation was
+    // done by the keyboard.
+#ifdef XP_WIN
+    if (aFromKey && IsOpen() && IsMenuList()) {
+      // Fire a command event as the new item, but we don't want to close
+      // the menu, blink it, or update any other state of the menuitem. The
+      // command event will cause the item to be selected.
+      nsContentUtils::DispatchXULCommand(aMenuItem->GetContent(), /* aTrusted = */ true,
+                                         nullptr, PresContext()->PresShell(),
+                                         false, false, false, false);
+    }
+#endif
+  }
+
+  mCurrentMenu = aMenuItem;
+
+  return NS_OK;
+}
+
+nsMenuFrame*
+nsMenuPopupFrame::Enter(WidgetGUIEvent* aEvent)
+{
+  mIncrementalString.Truncate();
+
+  // Give it to the child.
+  if (mCurrentMenu)
+    return mCurrentMenu->Enter(aEvent);
+
+  return nullptr;
+}
+
+nsMenuFrame*
+nsMenuPopupFrame::FindMenuWithShortcut(nsIDOMKeyEvent* aKeyEvent, bool& doAction)
+{
+  uint32_t charCode, keyCode;
+  aKeyEvent->GetCharCode(&charCode);
+  aKeyEvent->GetKeyCode(&keyCode);
+
+  doAction = false;
+
+  // Enumerate over our list of frames.
+  auto insertion = PresContext()->PresShell()->
+    FrameConstructor()->GetInsertionPoint(GetContent(), nullptr);
+  nsContainerFrame* immediateParent = insertion.mParentFrame;
+  if (!immediateParent)
+    immediateParent = this;
+
+  uint32_t matchCount = 0, matchShortcutCount = 0;
+  bool foundActive = false;
+  bool isShortcut;
+  nsMenuFrame* frameBefore = nullptr;
+  nsMenuFrame* frameAfter = nullptr;
+  nsMenuFrame* frameShortcut = nullptr;
+
+  nsIContent* parentContent = mContent->GetParent();
+
+  bool isMenu = parentContent &&
+                  !parentContent->NodeInfo()->Equals(nsGkAtoms::menulist, kNameSpaceID_XUL);
+
+  DOMTimeStamp keyTime;
+  aKeyEvent->AsEvent()->GetTimeStamp(&keyTime);
+
+  if (charCode == 0) {
+    if (keyCode == nsIDOMKeyEvent::DOM_VK_BACK_SPACE) {
+      if (!isMenu && !mIncrementalString.IsEmpty()) {
+        mIncrementalString.SetLength(mIncrementalString.Length() - 1);
+        return nullptr;
+      }
+      else {
+#ifdef XP_WIN
+        nsCOMPtr<nsISound> soundInterface = do_CreateInstance("@mozilla.org/sound;1");
+        if (soundInterface)
+          soundInterface->Beep();
+#endif  // #ifdef XP_WIN
+      }
+    }
+    return nullptr;
+  }
+  else {
+    char16_t uniChar = ToLowerCase(static_cast<char16_t>(charCode));
+    if (isMenu) {
+      // Menu supports only first-letter navigation
+      mIncrementalString = uniChar;
+    } else if (IsWithinIncrementalTime(keyTime)) {
+      mIncrementalString.Append(uniChar);
+    } else {
+      // Interval too long, treat as new typing
+      mIncrementalString = uniChar;
+    }
+  }
+
+  // See bug 188199 & 192346, if all letters in incremental string are same, just try to match the first one
+  nsAutoString incrementalString(mIncrementalString);
+  uint32_t charIndex = 1, stringLength = incrementalString.Length();
+  while (charIndex < stringLength && incrementalString[charIndex] == incrementalString[charIndex - 1]) {
+    charIndex++;
+  }
+  if (charIndex == stringLength) {
+    incrementalString.Truncate(1);
+    stringLength = 1;
+  }
+
+  sLastKeyTime = keyTime;
+
+  // NOTE: If you crashed here due to a bogus |immediateParent| it is 
+  //       possible that the menu whose shortcut is being looked up has 
+  //       been destroyed already.  One strategy would be to 
+  //       setTimeout(<func>,0) as detailed in:
+  //       <http://bugzilla.mozilla.org/show_bug.cgi?id=126675#c32>
+  nsIFrame* firstMenuItem = nsXULPopupManager::GetNextMenuItem(immediateParent, nullptr, true);
+  nsIFrame* currFrame = firstMenuItem;
+
+  int32_t menuAccessKey = -1;
+  nsMenuBarListener::GetMenuAccessKey(&menuAccessKey);
+
+  // We start searching from first child. This process is divided into two parts
+  //   -- before current and after current -- by the current item
+  while (currFrame) {
+    nsIContent* current = currFrame->GetContent();
+    nsAutoString textKey;
+    if (menuAccessKey >= 0) {
+      // Get the shortcut attribute.
+      current->GetAttr(kNameSpaceID_None, nsGkAtoms::accesskey, textKey);
+    }
+    if (textKey.IsEmpty()) { // No shortcut, try first letter
+      isShortcut = false;
+      current->GetAttr(kNameSpaceID_None, nsGkAtoms::label, textKey);
+      if (textKey.IsEmpty()) // No label, try another attribute (value)
+        current->GetAttr(kNameSpaceID_None, nsGkAtoms::value, textKey);
+    }
+    else
+      isShortcut = true;
+
+    if (StringBeginsWith(textKey, incrementalString,
+                         nsCaseInsensitiveStringComparator())) {
+      // mIncrementalString is a prefix of textKey
+      nsMenuFrame* menu = do_QueryFrame(currFrame);
+      if (menu) {
+        // There is one match
+        matchCount++;
+        if (isShortcut) {
+          // There is one shortcut-key match
+          matchShortcutCount++;
+          // Record the matched item. If there is only one matched shortcut item, do it
+          frameShortcut = menu;
+        }
+        if (!foundActive) {
+          // It's a first candidate item located before/on the current item
+          if (!frameBefore)
+            frameBefore = menu;
+        }
+        else {
+          // It's a first candidate item located after the current item
+          if (!frameAfter)
+            frameAfter = menu;
+        }
+      }
+      else
+        return nullptr;
+    }
+
+    // Get the active status
+    if (current->AttrValueIs(kNameSpaceID_None, nsGkAtoms::menuactive,
+                             nsGkAtoms::_true, eCaseMatters)) {
+      foundActive = true;
+      if (stringLength > 1) {
+        // If there is more than one char typed, the current item has highest priority,
+        //   otherwise the item next to current has highest priority
+        if (currFrame == frameBefore)
+          return frameBefore;
+      }
+    }
+
+    nsMenuFrame* menu = do_QueryFrame(currFrame);
+    currFrame = nsXULPopupManager::GetNextMenuItem(immediateParent, menu, true);
+    if (currFrame == firstMenuItem)
+      break;
+  }
+
+  doAction = (isMenu && (matchCount == 1 || matchShortcutCount == 1));
+
+  if (matchShortcutCount == 1) // We have one matched shortcut item
+    return frameShortcut;
+  if (frameAfter) // If we have matched item after the current, use it
+    return frameAfter;
+  else if (frameBefore) // If we haven't, use the item before the current
+    return frameBefore;
+
+  // If we don't match anything, rollback the last typing
+  mIncrementalString.SetLength(mIncrementalString.Length() - 1);
+
+  // didn't find a matching menu item
+#ifdef XP_WIN
+  // behavior on Windows - this item is in a menu popup off of the
+  // menu bar, so beep and do nothing else
+  if (isMenu) {
+    nsCOMPtr<nsISound> soundInterface = do_CreateInstance("@mozilla.org/sound;1");
+    if (soundInterface)
+      soundInterface->Beep();
+  }
+#endif  // #ifdef XP_WIN
+
+  return nullptr;
+}
+
+void
+nsMenuPopupFrame::LockMenuUntilClosed(bool aLock)
+{
+  mIsMenuLocked = aLock;
+
+  // Lock / unlock the parent, too.
+  nsMenuFrame* menu = do_QueryFrame(GetParent());
+  if (menu) {
+    nsMenuParent* parentParent = menu->GetMenuParent();
+    if (parentParent) {
+      parentParent->LockMenuUntilClosed(aLock);
+    }
+  }
+}
+
+nsIWidget*
+nsMenuPopupFrame::GetWidget()
+{
+  nsView * view = GetRootViewForPopup(this);
+  if (!view)
+    return nullptr;
+
+  return view->GetWidget();
+}
+
+void
+nsMenuPopupFrame::AttachedDismissalListener()
+{
+  mConsumeRollupEvent = PopupBoxObject::ROLLUP_DEFAULT;
+}
+
+// helpers /////////////////////////////////////////////////////////////
+
+nsresult 
+nsMenuPopupFrame::AttributeChanged(int32_t aNameSpaceID,
+                                   nsIAtom* aAttribute,
+                                   int32_t aModType)
+
+{
+  nsresult rv = nsBoxFrame::AttributeChanged(aNameSpaceID, aAttribute,
+                                             aModType);
+  
+  if (aAttribute == nsGkAtoms::left || aAttribute == nsGkAtoms::top)
+    MoveToAttributePosition();
+
+#ifndef MOZ_GTK2
+  if (aAttribute == nsGkAtoms::noautohide) {
+    nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
+    if (pm)
+      pm->EnableRollup(mContent, !IsNoAutoHide());
+  }
+#endif
+
+  if (aAttribute == nsGkAtoms::label) {
+    // set the label for the titlebar
+    nsView* view = GetView();
+    if (view) {
+      nsIWidget* widget = view->GetWidget();
+      if (widget) {
+        nsAutoString title;
+        mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::label, title);
+        if (!title.IsEmpty()) {
+          widget->SetTitle(title);
+        }
+      }
+    }
+  }
+
+  return rv;
+}
+
+void
+nsMenuPopupFrame::MoveToAttributePosition()
+{
+  // Move the widget around when the user sets the |left| and |top| attributes. 
+  // Note that this is not the best way to move the widget, as it results in lots
+  // of FE notifications and is likely to be slow as molasses. Use |moveTo| on
+  // PopupBoxObject if possible.
+  nsAutoString left, top;
+  mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::left, left);
+  mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::top, top);
+  nsresult err1, err2;
+  mozilla::CSSIntPoint pos(left.ToInteger(&err1), top.ToInteger(&err2));
+
+  if (NS_SUCCEEDED(err1) && NS_SUCCEEDED(err2))
+    MoveTo(pos, false);
+}
+
+void
+nsMenuPopupFrame::DestroyFrom(nsIFrame* aDestructRoot)
+{
+  if (mReflowCallbackData.mPosted) {
+    PresContext()->PresShell()->CancelReflowCallback(this);
+    mReflowCallbackData.Clear();
+  }
+
+  nsMenuFrame* menu = do_QueryFrame(GetParent());
+  if (menu) {
+    // clear the open attribute on the parent menu
+    nsContentUtils::AddScriptRunner(
+      new nsUnsetAttrRunnable(menu->GetContent(), nsGkAtoms::open));
+  }
+
+  ClearPopupShownDispatcher();
+
+  nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
+  if (pm)
+    pm->PopupDestroyed(this);
+
+  nsIRootBox* rootBox =
+    nsIRootBox::GetRootBox(PresContext()->GetPresShell());
+  if (rootBox && rootBox->GetDefaultTooltip() == mContent) {
+    rootBox->SetDefaultTooltip(nullptr);
+  }
+
+  nsBoxFrame::DestroyFrom(aDestructRoot);
+}
+
+
+void
+nsMenuPopupFrame::MoveTo(const CSSIntPoint& aPos, bool aUpdateAttrs)
+{
+  nsIWidget* widget = GetWidget();
+  if ((mScreenRect.x == aPos.x && mScreenRect.y == aPos.y) &&
+      (!widget || widget->GetClientOffset() == mLastClientOffset)) {
+    return;
+  }
+
+  // reposition the popup at the specified coordinates. Don't clear the anchor
+  // and position, because the popup can be reset to its anchor position by
+  // using (-1, -1) as coordinates. Subtract off the margin as it will be
+  // added to the position when SetPopupPosition is called.
+  nsMargin margin(0, 0, 0, 0);
+  StyleMargin()->GetMargin(margin);
+
+  // Workaround for bug 788189.  See also bug 708278 comment #25 and following.
+  if (mAdjustOffsetForContextMenu) {
+    margin.left += nsPresContext::CSSPixelsToAppUnits(LookAndFeel::GetInt(
+                     LookAndFeel::eIntID_ContextMenuOffsetHorizontal));
+    margin.top += nsPresContext::CSSPixelsToAppUnits(LookAndFeel::GetInt(
+                     LookAndFeel::eIntID_ContextMenuOffsetVertical));
+  }
+
+  nsPresContext* presContext = PresContext();
+  mAnchorType = MenuPopupAnchorType_Point;
+  mScreenRect.x = aPos.x - presContext->AppUnitsToIntCSSPixels(margin.left);
+  mScreenRect.y = aPos.y - presContext->AppUnitsToIntCSSPixels(margin.top);
+
+  SetPopupPosition(nullptr, true, false, true);
+
+  nsCOMPtr<nsIContent> popup = mContent;
+  if (aUpdateAttrs && (popup->HasAttr(kNameSpaceID_None, nsGkAtoms::left) ||
+                       popup->HasAttr(kNameSpaceID_None, nsGkAtoms::top)))
+  {
+    nsAutoString left, top;
+    left.AppendInt(aPos.x);
+    top.AppendInt(aPos.y);
+    popup->SetAttr(kNameSpaceID_None, nsGkAtoms::left, left, false);
+    popup->SetAttr(kNameSpaceID_None, nsGkAtoms::top, top, false);
+  }
+}
+
+void
+nsMenuPopupFrame::MoveToAnchor(nsIContent* aAnchorContent,
+                               const nsAString& aPosition,
+                               int32_t aXPos, int32_t aYPos,
+                               bool aAttributesOverride)
+{
+  NS_ASSERTION(IsVisible(), "popup must be visible to move it");
+
+  nsPopupState oldstate = mPopupState;
+  InitializePopup(aAnchorContent, mTriggerContent, aPosition,
+                  aXPos, aYPos, MenuPopupAnchorType_Node, aAttributesOverride);
+  // InitializePopup changed the state so reset it.
+  mPopupState = oldstate;
+
+  // Pass false here so that flipping and adjusting to fit on the screen happen.
+  SetPopupPosition(nullptr, false, false, true);
+}
+
+bool
+nsMenuPopupFrame::GetAutoPosition()
+{
+  return mShouldAutoPosition;
+}
+
+void
+nsMenuPopupFrame::SetAutoPosition(bool aShouldAutoPosition)
+{
+  mShouldAutoPosition = aShouldAutoPosition;
+}
+
+void
+nsMenuPopupFrame::SetConsumeRollupEvent(uint32_t aConsumeMode)
+{
+  mConsumeRollupEvent = aConsumeMode;
+}
+
+int8_t
+nsMenuPopupFrame::GetAlignmentPosition() const
+{
+  // The code below handles most cases of alignment, anchor and position values. Those that are
+  // not handled just return POPUPPOSITION_UNKNOWN.
+
+  if (mPosition == POPUPPOSITION_OVERLAP || mPosition == POPUPPOSITION_AFTERPOINTER ||
+      mPosition == POPUPPOSITION_SELECTION)
+    return mPosition;
+
+  int8_t position = mPosition;
+
+  if (position == POPUPPOSITION_UNKNOWN) {
+    switch (mPopupAnchor) {
+      case POPUPALIGNMENT_BOTTOMCENTER:
+        position = mPopupAlignment == POPUPALIGNMENT_TOPRIGHT ?
+                     POPUPPOSITION_AFTEREND : POPUPPOSITION_AFTERSTART;
+        break;
+      case POPUPALIGNMENT_TOPCENTER:
+        position = mPopupAlignment == POPUPALIGNMENT_BOTTOMRIGHT ?
+                     POPUPPOSITION_BEFOREEND : POPUPPOSITION_BEFORESTART;
+        break;
+      case POPUPALIGNMENT_LEFTCENTER:
+        position = mPopupAlignment == POPUPALIGNMENT_BOTTOMRIGHT ?
+                     POPUPPOSITION_STARTAFTER : POPUPPOSITION_STARTBEFORE;
+        break;
+      case POPUPALIGNMENT_RIGHTCENTER:
+        position = mPopupAlignment == POPUPALIGNMENT_BOTTOMLEFT ?
+                     POPUPPOSITION_ENDAFTER : POPUPPOSITION_ENDBEFORE;
+        break;
+      default:
+        break;
+    }
+  }
+
+  if (mHFlip) {
+    position = POPUPPOSITION_HFLIP(position);
+  }
+
+  if (mVFlip) {
+    position = POPUPPOSITION_VFLIP(position);
+  }
+
+  return position;
+}
+
+/**
+ * KEEP THIS IN SYNC WITH nsContainerFrame::CreateViewForFrame
+ * as much as possible. Until we get rid of views finally...
+ */
+void
+nsMenuPopupFrame::CreatePopupView()
+{
+  if (HasView()) {
+    return;
+  }
+
+  nsViewManager* viewManager = PresContext()->GetPresShell()->GetViewManager();
+  NS_ASSERTION(nullptr != viewManager, "null view manager");
+
+  // Create a view
+  nsView* parentView = viewManager->GetRootView();
+  nsViewVisibility visibility = nsViewVisibility_kHide;
+  int32_t zIndex = INT32_MAX;
+  bool    autoZIndex = false;
+
+  NS_ASSERTION(parentView, "no parent view");
+
+  // Create a view
+  nsView *view = viewManager->CreateView(GetRect(), parentView, visibility);
+  viewManager->SetViewZIndex(view, autoZIndex, zIndex);
+  // XXX put view last in document order until we can do better
+  viewManager->InsertChild(parentView, view, nullptr, true);
+
+  // Remember our view
+  SetView(view);
+
+  NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
+    ("nsMenuPopupFrame::CreatePopupView: frame=%p view=%p", this, view));
+}