Add m-esr52 at 52.6.0

1 files changed, 2870 insertions, 0 deletions

diff --git a/layout/xul/nsXULPopupManager.cpp b/layout/xul/nsXULPopupManager.cpp
new file mode 100644
index 000000000..6e8cc3dda
--- /dev/null
+++ b/layout/xul/nsXULPopupManager.cpp
@@ -0,0 +1,2870 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsGkAtoms.h"
+#include "nsXULPopupManager.h"
+#include "nsMenuFrame.h"
+#include "nsMenuPopupFrame.h"
+#include "nsMenuBarFrame.h"
+#include "nsMenuBarListener.h"
+#include "nsContentUtils.h"
+#include "nsIDOMDocument.h"
+#include "nsIDOMEvent.h"
+#include "nsIDOMXULElement.h"
+#include "nsIDOMXULMenuListElement.h"
+#include "nsIXULDocument.h"
+#include "nsIXULTemplateBuilder.h"
+#include "nsCSSFrameConstructor.h"
+#include "nsGlobalWindow.h"
+#include "nsLayoutUtils.h"
+#include "nsViewManager.h"
+#include "nsIComponentManager.h"
+#include "nsITimer.h"
+#include "nsFocusManager.h"
+#include "nsIDocShell.h"
+#include "nsPIDOMWindow.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsIBaseWindow.h"
+#include "nsIDOMKeyEvent.h"
+#include "nsIDOMMouseEvent.h"
+#include "nsCaret.h"
+#include "nsIDocument.h"
+#include "nsPIWindowRoot.h"
+#include "nsFrameManager.h"
+#include "nsIObserverService.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/Event.h" // for nsIDOMEvent::InternalDOMEvent()
+#include "mozilla/EventDispatcher.h"
+#include "mozilla/EventStateManager.h"
+#include "mozilla/LookAndFeel.h"
+#include "mozilla/MouseEvents.h"
+#include "mozilla/Services.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+static_assert(nsIDOMKeyEvent::DOM_VK_HOME  == nsIDOMKeyEvent::DOM_VK_END + 1 &&
+              nsIDOMKeyEvent::DOM_VK_LEFT  == nsIDOMKeyEvent::DOM_VK_END + 2 &&
+              nsIDOMKeyEvent::DOM_VK_UP    == nsIDOMKeyEvent::DOM_VK_END + 3 &&
+              nsIDOMKeyEvent::DOM_VK_RIGHT == nsIDOMKeyEvent::DOM_VK_END + 4 &&
+              nsIDOMKeyEvent::DOM_VK_DOWN  == nsIDOMKeyEvent::DOM_VK_END + 5,
+              "nsXULPopupManager assumes some keyCode values are consecutive");
+
+const nsNavigationDirection DirectionFromKeyCodeTable[2][6] = {
+  {
+    eNavigationDirection_Last,   // nsIDOMKeyEvent::DOM_VK_END
+    eNavigationDirection_First,  // nsIDOMKeyEvent::DOM_VK_HOME
+    eNavigationDirection_Start,  // nsIDOMKeyEvent::DOM_VK_LEFT
+    eNavigationDirection_Before, // nsIDOMKeyEvent::DOM_VK_UP
+    eNavigationDirection_End,    // nsIDOMKeyEvent::DOM_VK_RIGHT
+    eNavigationDirection_After   // nsIDOMKeyEvent::DOM_VK_DOWN
+  },
+  {
+    eNavigationDirection_Last,   // nsIDOMKeyEvent::DOM_VK_END
+    eNavigationDirection_First,  // nsIDOMKeyEvent::DOM_VK_HOME
+    eNavigationDirection_End,    // nsIDOMKeyEvent::DOM_VK_LEFT
+    eNavigationDirection_Before, // nsIDOMKeyEvent::DOM_VK_UP
+    eNavigationDirection_Start,  // nsIDOMKeyEvent::DOM_VK_RIGHT
+    eNavigationDirection_After   // nsIDOMKeyEvent::DOM_VK_DOWN
+  }
+};
+
+nsXULPopupManager* nsXULPopupManager::sInstance = nullptr;
+
+nsIContent* nsMenuChainItem::Content()
+{
+  return mFrame->GetContent();
+}
+
+void nsMenuChainItem::SetParent(nsMenuChainItem* aParent)
+{
+  if (mParent) {
+    NS_ASSERTION(mParent->mChild == this, "Unexpected - parent's child not set to this");
+    mParent->mChild = nullptr;
+  }
+  mParent = aParent;
+  if (mParent) {
+    if (mParent->mChild)
+      mParent->mChild->mParent = nullptr;
+    mParent->mChild = this;
+  }
+}
+
+void nsMenuChainItem::Detach(nsMenuChainItem** aRoot)
+{
+  // If the item has a child, set the child's parent to this item's parent,
+  // effectively removing the item from the chain. If the item has no child,
+  // just set the parent to null.
+  if (mChild) {
+    NS_ASSERTION(this != *aRoot, "Unexpected - popup with child at end of chain");
+    mChild->SetParent(mParent);
+  }
+  else {
+    // An item without a child should be the first item in the chain, so set
+    // the first item pointer, pointed to by aRoot, to the parent.
+    NS_ASSERTION(this == *aRoot, "Unexpected - popup with no child not at end of chain");
+    *aRoot = mParent;
+    SetParent(nullptr);
+  }
+}
+
+bool nsXULPopupManager::sDevtoolsDisableAutoHide = false;
+
+const char* kPrefDevtoolsDisableAutoHide =
+  "ui.popup.disable_autohide";
+
+NS_IMPL_ISUPPORTS(nsXULPopupManager,
+                  nsIDOMEventListener,
+                  nsITimerCallback,
+                  nsIObserver)
+
+nsXULPopupManager::nsXULPopupManager() :
+  mRangeOffset(0),
+  mCachedMousePoint(0, 0),
+  mCachedModifiers(0),
+  mActiveMenuBar(nullptr),
+  mPopups(nullptr),
+  mNoHidePanels(nullptr),
+  mTimerMenu(nullptr)
+{
+  nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
+  if (obs) {
+    obs->AddObserver(this, "xpcom-shutdown", false);
+  }
+  Preferences::AddBoolVarCache(&sDevtoolsDisableAutoHide,
+                               kPrefDevtoolsDisableAutoHide, false);
+}
+
+nsXULPopupManager::~nsXULPopupManager() 
+{
+  NS_ASSERTION(!mPopups && !mNoHidePanels, "XUL popups still open");
+}
+
+nsresult
+nsXULPopupManager::Init()
+{
+  sInstance = new nsXULPopupManager();
+  NS_ENSURE_TRUE(sInstance, NS_ERROR_OUT_OF_MEMORY);
+  NS_ADDREF(sInstance);
+  return NS_OK;
+}
+
+void
+nsXULPopupManager::Shutdown()
+{
+  NS_IF_RELEASE(sInstance);
+}
+
+NS_IMETHODIMP
+nsXULPopupManager::Observe(nsISupports *aSubject,
+                           const char *aTopic,
+                           const char16_t *aData)
+{
+  if (!nsCRT::strcmp(aTopic, "xpcom-shutdown")) {
+    if (mKeyListener) {
+      mKeyListener->RemoveEventListener(NS_LITERAL_STRING("keypress"), this, true);
+      mKeyListener->RemoveEventListener(NS_LITERAL_STRING("keydown"), this, true);
+      mKeyListener->RemoveEventListener(NS_LITERAL_STRING("keyup"), this, true);
+      mKeyListener = nullptr;
+    }
+    mRangeParent = nullptr;
+    // mOpeningPopup is cleared explicitly soon after using it.
+    nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
+    if (obs) {
+      obs->RemoveObserver(this, "xpcom-shutdown");
+    }
+  }
+
+  return NS_OK;
+}
+
+nsXULPopupManager*
+nsXULPopupManager::GetInstance()
+{
+  MOZ_ASSERT(sInstance);
+  return sInstance;
+}
+
+bool
+nsXULPopupManager::Rollup(uint32_t aCount, bool aFlush,
+                          const nsIntPoint* pos, nsIContent** aLastRolledUp)
+{
+  // We can disable the autohide behavior via a pref to ease debugging.
+  if (nsXULPopupManager::sDevtoolsDisableAutoHide) {
+    // Required on linux to allow events to work on other targets.
+    if (mWidget) {
+      mWidget->CaptureRollupEvents(nullptr, false);
+    }
+    return false;
+  }
+
+  bool consume = false;
+
+  nsMenuChainItem* item = GetTopVisibleMenu();
+  if (item) {
+    if (aLastRolledUp) {
+      // We need to get the popup that will be closed last, so that widget can
+      // keep track of it so it doesn't reopen if a mousedown event is going to
+      // processed. Keep going up the menu chain to get the first level menu of
+      // the same type. If a different type is encountered it means we have,
+      // for example, a menulist or context menu inside a panel, and we want to
+      // treat these as distinct. It's possible that this menu doesn't end up
+      // closing because the popuphiding event was cancelled, but in that case
+      // we don't need to deal with the menu reopening as it will already still
+      // be open.
+      nsMenuChainItem* first = item;
+      while (first->GetParent()) {
+        nsMenuChainItem* parent = first->GetParent();
+        if (first->Frame()->PopupType() != parent->Frame()->PopupType() ||
+            first->IsContextMenu() != parent->IsContextMenu()) {
+          break;
+        }
+        first = parent;
+      }
+
+
+      *aLastRolledUp = first->Content();
+    }
+
+    ConsumeOutsideClicksResult consumeResult = item->Frame()->ConsumeOutsideClicks();
+    consume = (consumeResult == ConsumeOutsideClicks_True);
+
+    bool rollup = true;
+
+    // If norolluponanchor is true, then don't rollup when clicking the anchor.
+    // This would be used to allow adjusting the caret position in an
+    // autocomplete field without hiding the popup for example.
+    bool noRollupOnAnchor = (!consume && pos &&
+      item->Frame()->GetContent()->AttrValueIs(kNameSpaceID_None,
+        nsGkAtoms::norolluponanchor, nsGkAtoms::_true, eCaseMatters));
+
+    // When ConsumeOutsideClicks_ParentOnly is used, always consume the click
+    // when the click was over the anchor. This way, clicking on a menu doesn't
+    // reopen the menu.
+    if ((consumeResult == ConsumeOutsideClicks_ParentOnly || noRollupOnAnchor) && pos) {
+      nsMenuPopupFrame* popupFrame = item->Frame();
+      nsIntRect anchorRect;
+      if (popupFrame->IsAnchored()) {
+        // Check if the popup has a screen anchor rectangle. If not, get the rectangle
+        // from the anchor element.
+        anchorRect = popupFrame->GetScreenAnchorRect();
+        if (anchorRect.x == -1 || anchorRect.y == -1) {
+          nsCOMPtr<nsIContent> anchor = popupFrame->GetAnchor();
+
+          // Check if the anchor has indicated another node to use for checking
+          // for roll-up. That way, we can anchor a popup on anonymous content or
+          // an individual icon, while clicking elsewhere within a button or other
+          // container doesn't result in us re-opening the popup.
+          if (anchor) {
+            nsAutoString consumeAnchor;
+            anchor->GetAttr(kNameSpaceID_None, nsGkAtoms::consumeanchor,
+                            consumeAnchor);
+            if (!consumeAnchor.IsEmpty()) {
+              nsIDocument* doc = anchor->GetOwnerDocument();
+              nsIContent* newAnchor = doc->GetElementById(consumeAnchor);
+              if (newAnchor) {
+                anchor = newAnchor;
+              }
+            }
+          }
+
+          if (anchor && anchor->GetPrimaryFrame()) {
+            anchorRect = anchor->GetPrimaryFrame()->GetScreenRect();
+          }
+        }
+      }
+
+      // It's possible that some other element is above the anchor at the same
+      // position, but the only thing that would happen is that the mouse
+      // event will get consumed, so here only a quick coordinates check is
+      // done rather than a slower complete check of what is at that location.
+      nsPresContext* presContext = item->Frame()->PresContext();
+      nsIntPoint posCSSPixels(presContext->DevPixelsToIntCSSPixels(pos->x),
+                              presContext->DevPixelsToIntCSSPixels(pos->y));
+      if (anchorRect.Contains(posCSSPixels)) {
+        if (consumeResult == ConsumeOutsideClicks_ParentOnly) {
+          consume = true;
+        }
+
+        if (noRollupOnAnchor) {
+          rollup = false;
+        }
+      }
+    }
+
+    if (rollup) {
+      // if a number of popups to close has been specified, determine the last
+      // popup to close
+      nsIContent* lastPopup = nullptr;
+      if (aCount != UINT32_MAX) {
+        nsMenuChainItem* last = item;
+        while (--aCount && last->GetParent()) {
+          last = last->GetParent();
+        }
+        if (last) {
+          lastPopup = last->Content();
+        }
+      }
+
+      nsPresContext* presContext = item->Frame()->PresContext();
+      RefPtr<nsViewManager> viewManager = presContext->PresShell()->GetViewManager();
+
+      HidePopup(item->Content(), true, true, false, true, lastPopup);
+
+      if (aFlush) {
+        // The popup's visibility doesn't update until the minimize animation has
+        // finished, so call UpdateWidgetGeometry to update it right away.
+        viewManager->UpdateWidgetGeometry();
+      }
+    }
+  }
+
+  return consume;
+}
+
+////////////////////////////////////////////////////////////////////////
+bool nsXULPopupManager::ShouldRollupOnMouseWheelEvent()
+{
+  // should rollup only for autocomplete widgets
+  // XXXndeakin this should really be something the popup has more control over
+
+  nsMenuChainItem* item = GetTopVisibleMenu();
+  if (!item)
+    return false;
+
+  nsIContent* content = item->Frame()->GetContent();
+  if (!content)
+    return false;
+
+  if (content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::rolluponmousewheel,
+                           nsGkAtoms::_true, eCaseMatters))
+    return true;
+
+  if (content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::rolluponmousewheel,
+                           nsGkAtoms::_false, eCaseMatters))
+    return false;
+
+  nsAutoString value;
+  content->GetAttr(kNameSpaceID_None, nsGkAtoms::type, value);
+  return StringBeginsWith(value, NS_LITERAL_STRING("autocomplete"));
+}
+
+bool nsXULPopupManager::ShouldConsumeOnMouseWheelEvent()
+{
+  nsMenuChainItem* item = GetTopVisibleMenu();
+  if (!item)
+    return false;
+
+  nsMenuPopupFrame* frame = item->Frame();
+  if (frame->PopupType() != ePopupTypePanel)
+    return true;
+
+  nsIContent* content = frame->GetContent();
+  return !(content && content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
+                                           nsGkAtoms::arrow, eCaseMatters));
+}
+
+// a menu should not roll up if activated by a mouse activate message (eg. X-mouse)
+bool nsXULPopupManager::ShouldRollupOnMouseActivate()
+{
+  return false;
+}
+
+uint32_t
+nsXULPopupManager::GetSubmenuWidgetChain(nsTArray<nsIWidget*> *aWidgetChain)
+{
+  // this method is used by the widget code to determine the list of popups
+  // that are open. If a mouse click occurs outside one of these popups, the
+  // panels will roll up. If the click is inside a popup, they will not roll up
+  uint32_t count = 0, sameTypeCount = 0;
+
+  NS_ASSERTION(aWidgetChain, "null parameter");
+  nsMenuChainItem* item = GetTopVisibleMenu();
+  while (item) {
+    nsCOMPtr<nsIWidget> widget = item->Frame()->GetWidget();
+    NS_ASSERTION(widget, "open popup has no widget");
+    aWidgetChain->AppendElement(widget.get());
+    // In the case when a menulist inside a panel is open, clicking in the
+    // panel should still roll up the menu, so if a different type is found,
+    // stop scanning.
+    nsMenuChainItem* parent = item->GetParent();
+    if (!sameTypeCount) {
+      count++;
+      if (!parent || item->Frame()->PopupType() != parent->Frame()->PopupType() ||
+                     item->IsContextMenu() != parent->IsContextMenu()) {
+        sameTypeCount = count;
+      }
+    }
+    item = parent;
+  }
+
+  return sameTypeCount;
+}
+
+nsIWidget*
+nsXULPopupManager::GetRollupWidget()
+{
+  nsMenuChainItem* item = GetTopVisibleMenu();
+  return item ? item->Frame()->GetWidget() : nullptr;
+}
+
+void
+nsXULPopupManager::AdjustPopupsOnWindowChange(nsPIDOMWindowOuter* aWindow)
+{
+  // When the parent window is moved, adjust any child popups. Dismissable
+  // menus and panels are expected to roll up when a window is moved, so there
+  // is no need to check these popups, only the noautohide popups.
+
+  // The items are added to a list so that they can be adjusted bottom to top.
+  nsTArray<nsMenuPopupFrame *> list;
+
+  nsMenuChainItem* item = mNoHidePanels;
+  while (item) {
+    // only move popups that are within the same window and where auto
+    // positioning has not been disabled
+    nsMenuPopupFrame* frame = item->Frame();
+    if (frame->GetAutoPosition()) {
+      nsIContent* popup = frame->GetContent();
+      if (popup) {
+        nsIDocument* document = popup->GetUncomposedDoc();
+        if (document) {
+          if (nsPIDOMWindowOuter* window = document->GetWindow()) {
+            window = window->GetPrivateRoot();
+            if (window == aWindow) {
+              list.AppendElement(frame);
+            }
+          }
+        }
+      }
+    }
+
+    item = item->GetParent();
+  }
+
+  for (int32_t l = list.Length() - 1; l >= 0; l--) {
+    list[l]->SetPopupPosition(nullptr, true, false, true);
+  }
+}
+
+void nsXULPopupManager::AdjustPopupsOnWindowChange(nsIPresShell* aPresShell)
+{
+  if (aPresShell->GetDocument()) {
+    AdjustPopupsOnWindowChange(aPresShell->GetDocument()->GetWindow());
+  }
+}
+
+static
+nsMenuPopupFrame* GetPopupToMoveOrResize(nsIFrame* aFrame)
+{
+  nsMenuPopupFrame* menuPopupFrame = do_QueryFrame(aFrame);
+  if (!menuPopupFrame)
+    return nullptr;
+
+  // no point moving or resizing hidden popups
+  if (!menuPopupFrame->IsVisible())
+    return nullptr;
+
+  nsIWidget* widget = menuPopupFrame->GetWidget();
+  if (widget && !widget->IsVisible())
+    return nullptr;
+
+  return menuPopupFrame;
+}
+
+void
+nsXULPopupManager::PopupMoved(nsIFrame* aFrame, nsIntPoint aPnt)
+{
+  nsMenuPopupFrame* menuPopupFrame = GetPopupToMoveOrResize(aFrame);
+  if (!menuPopupFrame)
+    return;
+
+  nsView* view = menuPopupFrame->GetView();
+  if (!view)
+    return;
+
+  // Don't do anything if the popup is already at the specified location. This
+  // prevents recursive calls when a popup is positioned.
+  LayoutDeviceIntRect curDevSize = view->CalcWidgetBounds(eWindowType_popup);
+  nsIWidget* widget = menuPopupFrame->GetWidget();
+  if (curDevSize.x == aPnt.x && curDevSize.y == aPnt.y &&
+      (!widget || widget->GetClientOffset() ==
+                  menuPopupFrame->GetLastClientOffset())) {
+    return;
+  }
+
+  // Update the popup's position using SetPopupPosition if the popup is
+  // anchored and at the parent level as these maintain their position
+  // relative to the parent window. Otherwise, just update the popup to
+  // the specified screen coordinates.
+  if (menuPopupFrame->IsAnchored() &&
+      menuPopupFrame->PopupLevel() == ePopupLevelParent) {
+    menuPopupFrame->SetPopupPosition(nullptr, true, false, true);
+  }
+  else {
+    CSSPoint cssPos = LayoutDeviceIntPoint::FromUnknownPoint(aPnt)
+                    / menuPopupFrame->PresContext()->CSSToDevPixelScale();
+    menuPopupFrame->MoveTo(RoundedToInt(cssPos), false);
+  }
+}
+
+void
+nsXULPopupManager::PopupResized(nsIFrame* aFrame, LayoutDeviceIntSize aSize)
+{
+  nsMenuPopupFrame* menuPopupFrame = GetPopupToMoveOrResize(aFrame);
+  if (!menuPopupFrame)
+    return;
+
+  nsView* view = menuPopupFrame->GetView();
+  if (!view)
+    return;
+
+  LayoutDeviceIntRect curDevSize = view->CalcWidgetBounds(eWindowType_popup);
+  // If the size is what we think it is, we have nothing to do.
+  if (curDevSize.width == aSize.width && curDevSize.height == aSize.height)
+    return;
+
+  nsIContent* popup = menuPopupFrame->GetContent();
+
+  // Only set the width and height if the popup already has these attributes.
+  if (!popup->HasAttr(kNameSpaceID_None, nsGkAtoms::width) ||
+      !popup->HasAttr(kNameSpaceID_None, nsGkAtoms::height)) {
+    return;
+  }
+
+  // The size is different. Convert the actual size to css pixels and store it
+  // as 'width' and 'height' attributes on the popup.
+  nsPresContext* presContext = menuPopupFrame->PresContext();
+
+  CSSIntSize newCSS(presContext->DevPixelsToIntCSSPixels(aSize.width),
+                    presContext->DevPixelsToIntCSSPixels(aSize.height));
+
+  nsAutoString width, height;
+  width.AppendInt(newCSS.width);
+  height.AppendInt(newCSS.height);
+  popup->SetAttr(kNameSpaceID_None, nsGkAtoms::width, width, false);
+  popup->SetAttr(kNameSpaceID_None, nsGkAtoms::height, height, true);
+}
+
+nsMenuPopupFrame*
+nsXULPopupManager::GetPopupFrameForContent(nsIContent* aContent, bool aShouldFlush)
+{
+  if (aShouldFlush) {
+    nsIDocument *document = aContent->GetUncomposedDoc();
+    if (document) {
+      nsCOMPtr<nsIPresShell> presShell = document->GetShell();
+      if (presShell)
+        presShell->FlushPendingNotifications(Flush_Layout);
+    }
+  }
+
+  return do_QueryFrame(aContent->GetPrimaryFrame());
+}
+
+nsMenuChainItem*
+nsXULPopupManager::GetTopVisibleMenu()
+{
+  nsMenuChainItem* item = mPopups;
+  while (item && item->Frame()->PopupState() == ePopupInvisible)
+    item = item->GetParent();
+  return item;
+}
+
+void
+nsXULPopupManager::GetMouseLocation(nsIDOMNode** aNode, int32_t* aOffset)
+{
+  *aNode = mRangeParent;
+  NS_IF_ADDREF(*aNode);
+  *aOffset = mRangeOffset;
+}
+
+void
+nsXULPopupManager::InitTriggerEvent(nsIDOMEvent* aEvent, nsIContent* aPopup,
+                                    nsIContent** aTriggerContent)
+{
+  mCachedMousePoint = LayoutDeviceIntPoint(0, 0);
+
+  if (aTriggerContent) {
+    *aTriggerContent = nullptr;
+    if (aEvent) {
+      // get the trigger content from the event
+      nsCOMPtr<nsIContent> target = do_QueryInterface(
+        aEvent->InternalDOMEvent()->GetTarget());
+      target.forget(aTriggerContent);
+    }
+  }
+
+  mCachedModifiers = 0;
+
+  nsCOMPtr<nsIDOMUIEvent> uiEvent = do_QueryInterface(aEvent);
+  if (uiEvent) {
+    uiEvent->GetRangeParent(getter_AddRefs(mRangeParent));
+    uiEvent->GetRangeOffset(&mRangeOffset);
+
+    // get the event coordinates relative to the root frame of the document
+    // containing the popup.
+    NS_ASSERTION(aPopup, "Expected a popup node");
+    WidgetEvent* event = aEvent->WidgetEventPtr();
+    if (event) {
+      WidgetInputEvent* inputEvent = event->AsInputEvent();
+      if (inputEvent) {
+        mCachedModifiers = inputEvent->mModifiers;
+      }
+      nsIDocument* doc = aPopup->GetUncomposedDoc();
+      if (doc) {
+        nsIPresShell* presShell = doc->GetShell();
+        nsPresContext* presContext;
+        if (presShell && (presContext = presShell->GetPresContext())) {
+          nsPresContext* rootDocPresContext =
+            presContext->GetRootPresContext();
+          if (!rootDocPresContext)
+            return;
+          nsIFrame* rootDocumentRootFrame = rootDocPresContext->
+              PresShell()->FrameManager()->GetRootFrame();
+          if ((event->mClass == eMouseEventClass || 
+               event->mClass == eMouseScrollEventClass ||
+               event->mClass == eWheelEventClass) &&
+               !event->AsGUIEvent()->mWidget) {
+            // no widget, so just use the client point if available
+            nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aEvent);
+            nsIntPoint clientPt;
+            mouseEvent->GetClientX(&clientPt.x);
+            mouseEvent->GetClientY(&clientPt.y);
+
+            // XXX this doesn't handle IFRAMEs in transforms
+            nsPoint thisDocToRootDocOffset = presShell->FrameManager()->
+              GetRootFrame()->GetOffsetToCrossDoc(rootDocumentRootFrame);
+            // convert to device pixels
+            mCachedMousePoint.x = presContext->AppUnitsToDevPixels(
+                nsPresContext::CSSPixelsToAppUnits(clientPt.x) + thisDocToRootDocOffset.x);
+            mCachedMousePoint.y = presContext->AppUnitsToDevPixels(
+                nsPresContext::CSSPixelsToAppUnits(clientPt.y) + thisDocToRootDocOffset.y);
+          }
+          else if (rootDocumentRootFrame) {
+            nsPoint pnt =
+              nsLayoutUtils::GetEventCoordinatesRelativeTo(event, rootDocumentRootFrame);
+            mCachedMousePoint = LayoutDeviceIntPoint(rootDocPresContext->AppUnitsToDevPixels(pnt.x),
+                                                     rootDocPresContext->AppUnitsToDevPixels(pnt.y));
+          }
+        }
+      }
+    }
+  }
+  else {
+    mRangeParent = nullptr;
+    mRangeOffset = 0;
+  }
+}
+
+void
+nsXULPopupManager::SetActiveMenuBar(nsMenuBarFrame* aMenuBar, bool aActivate)
+{
+  if (aActivate)
+    mActiveMenuBar = aMenuBar;
+  else if (mActiveMenuBar == aMenuBar)
+    mActiveMenuBar = nullptr;
+
+  UpdateKeyboardListeners();
+}
+
+void
+nsXULPopupManager::ShowMenu(nsIContent *aMenu,
+                            bool aSelectFirstItem,
+                            bool aAsynchronous)
+{
+  // generate any template content first. Otherwise, the menupopup may not
+  // have been created yet.
+  if (aMenu) {
+    nsIContent* element = aMenu;
+    do {
+      nsCOMPtr<nsIDOMXULElement> xulelem = do_QueryInterface(element);
+      if (xulelem) {
+        nsCOMPtr<nsIXULTemplateBuilder> builder;
+        xulelem->GetBuilder(getter_AddRefs(builder));
+        if (builder) {
+          builder->CreateContents(aMenu, true);
+          break;
+        }
+      }
+      element = element->GetParent();
+    } while (element);
+  }
+
+  nsMenuFrame* menuFrame = do_QueryFrame(aMenu->GetPrimaryFrame());
+  if (!menuFrame || !menuFrame->IsMenu())
+    return;
+
+  nsMenuPopupFrame* popupFrame =  menuFrame->GetPopup();
+  if (!popupFrame || !MayShowPopup(popupFrame))
+    return;
+
+  // inherit whether or not we're a context menu from the parent
+  bool parentIsContextMenu = false;
+  bool onMenuBar = false;
+  bool onmenu = menuFrame->IsOnMenu();
+
+  nsMenuParent* parent = menuFrame->GetMenuParent();
+  if (parent && onmenu) {
+    parentIsContextMenu = parent->IsContextMenu();
+    onMenuBar = parent->IsMenuBar();
+  }
+
+  nsAutoString position;
+
+#ifdef XP_MACOSX
+  nsCOMPtr<nsIDOMXULMenuListElement> menulist = do_QueryInterface(aMenu);
+  bool isNonEditableMenulist = false;
+  if (menulist) {
+    bool editable;
+    menulist->GetEditable(&editable);
+    isNonEditableMenulist = !editable;
+  }
+
+  if (isNonEditableMenulist) {
+    position.AssignLiteral("selection");
+  }
+  else
+#endif
+
+  if (onMenuBar || !onmenu)
+    position.AssignLiteral("after_start");
+  else
+    position.AssignLiteral("end_before");
+
+  // there is no trigger event for menus
+  InitTriggerEvent(nullptr, nullptr, nullptr);
+  popupFrame->InitializePopup(menuFrame->GetAnchor(), nullptr, position, 0, 0,
+                              MenuPopupAnchorType_Node, true);
+
+  if (aAsynchronous) {
+    nsCOMPtr<nsIRunnable> event =
+      new nsXULPopupShowingEvent(popupFrame->GetContent(),
+                                 parentIsContextMenu, aSelectFirstItem);
+    NS_DispatchToCurrentThread(event);
+  }
+  else {
+    nsCOMPtr<nsIContent> popupContent = popupFrame->GetContent();
+    FirePopupShowingEvent(popupContent, parentIsContextMenu, aSelectFirstItem);
+  }
+}
+
+void
+nsXULPopupManager::ShowPopup(nsIContent* aPopup,
+                             nsIContent* aAnchorContent,
+                             const nsAString& aPosition,
+                             int32_t aXPos, int32_t aYPos,
+                             bool aIsContextMenu,
+                             bool aAttributesOverride,
+                             bool aSelectFirstItem,
+                             nsIDOMEvent* aTriggerEvent)
+{
+  nsMenuPopupFrame* popupFrame = GetPopupFrameForContent(aPopup, true);
+  if (!popupFrame || !MayShowPopup(popupFrame))
+    return;
+
+  nsCOMPtr<nsIContent> triggerContent;
+  InitTriggerEvent(aTriggerEvent, aPopup, getter_AddRefs(triggerContent));
+
+  popupFrame->InitializePopup(aAnchorContent, triggerContent, aPosition,
+                              aXPos, aYPos, MenuPopupAnchorType_Node, aAttributesOverride);
+
+  FirePopupShowingEvent(aPopup, aIsContextMenu, aSelectFirstItem);
+}
+
+void
+nsXULPopupManager::ShowPopupAtScreen(nsIContent* aPopup,
+                                     int32_t aXPos, int32_t aYPos,
+                                     bool aIsContextMenu,
+                                     nsIDOMEvent* aTriggerEvent)
+{
+  nsMenuPopupFrame* popupFrame = GetPopupFrameForContent(aPopup, true);
+  if (!popupFrame || !MayShowPopup(popupFrame))
+    return;
+
+  nsCOMPtr<nsIContent> triggerContent;
+  InitTriggerEvent(aTriggerEvent, aPopup, getter_AddRefs(triggerContent));
+
+  popupFrame->InitializePopupAtScreen(triggerContent, aXPos, aYPos, aIsContextMenu);
+  FirePopupShowingEvent(aPopup, aIsContextMenu, false);
+}
+
+void
+nsXULPopupManager::ShowPopupAtScreenRect(nsIContent* aPopup,
+                                         const nsAString& aPosition,
+                                         const nsIntRect& aRect,
+                                         bool aIsContextMenu,
+                                         bool aAttributesOverride,
+                                         nsIDOMEvent* aTriggerEvent)
+{
+  nsMenuPopupFrame* popupFrame = GetPopupFrameForContent(aPopup, true);
+  if (!popupFrame || !MayShowPopup(popupFrame))
+    return;
+
+  nsCOMPtr<nsIContent> triggerContent;
+  InitTriggerEvent(aTriggerEvent, aPopup, getter_AddRefs(triggerContent));
+
+  popupFrame->InitializePopupAtRect(triggerContent, aPosition,
+                                    aRect, aAttributesOverride);
+
+  FirePopupShowingEvent(aPopup, aIsContextMenu, false);
+}
+
+void
+nsXULPopupManager::ShowTooltipAtScreen(nsIContent* aPopup,
+                                       nsIContent* aTriggerContent,
+                                       int32_t aXPos, int32_t aYPos)
+{
+  nsMenuPopupFrame* popupFrame = GetPopupFrameForContent(aPopup, true);
+  if (!popupFrame || !MayShowPopup(popupFrame))
+    return;
+
+  InitTriggerEvent(nullptr, nullptr, nullptr);
+
+  nsPresContext* pc = popupFrame->PresContext();
+  mCachedMousePoint = LayoutDeviceIntPoint(pc->CSSPixelsToDevPixels(aXPos),
+                                           pc->CSSPixelsToDevPixels(aYPos));
+
+  // coordinates are relative to the root widget
+  nsPresContext* rootPresContext = pc->GetRootPresContext();
+  if (rootPresContext) {
+    nsIWidget *rootWidget = rootPresContext->GetRootWidget();
+    if (rootWidget) {
+      mCachedMousePoint -= rootWidget->WidgetToScreenOffset();
+    }
+  }
+
+  popupFrame->InitializePopupAtScreen(aTriggerContent, aXPos, aYPos, false);
+
+  FirePopupShowingEvent(aPopup, false, false);
+}
+
+void
+nsXULPopupManager::ShowPopupWithAnchorAlign(nsIContent* aPopup,
+                                            nsIContent* aAnchorContent,
+                                            nsAString& aAnchor,
+                                            nsAString& aAlign,
+                                            int32_t aXPos, int32_t aYPos,
+                                            bool aIsContextMenu)
+{
+  nsMenuPopupFrame* popupFrame = GetPopupFrameForContent(aPopup, true);
+  if (!popupFrame || !MayShowPopup(popupFrame))
+    return;
+
+  InitTriggerEvent(nullptr, nullptr, nullptr);
+
+  popupFrame->InitializePopupWithAnchorAlign(aAnchorContent, aAnchor,
+                                             aAlign, aXPos, aYPos);
+  FirePopupShowingEvent(aPopup, aIsContextMenu, false);
+}
+
+static void
+CheckCaretDrawingState()
+{
+  // There is 1 caret per document, we need to find the focused
+  // document and erase its caret.
+  nsIFocusManager* fm = nsFocusManager::GetFocusManager();
+  if (fm) {
+    nsCOMPtr<mozIDOMWindowProxy> window;
+    fm->GetFocusedWindow(getter_AddRefs(window));
+    if (!window)
+      return;
+
+    auto* piWindow = nsPIDOMWindowOuter::From(window);
+    MOZ_ASSERT(piWindow);
+
+    nsCOMPtr<nsIDocument> focusedDoc = piWindow->GetDoc();
+    if (!focusedDoc)
+      return;
+
+    nsIPresShell* presShell = focusedDoc->GetShell();
+    if (!presShell)
+      return;
+
+    RefPtr<nsCaret> caret = presShell->GetCaret();
+    if (!caret)
+      return;
+    caret->SchedulePaint();
+  }
+}
+
+void
+nsXULPopupManager::ShowPopupCallback(nsIContent* aPopup,
+                                     nsMenuPopupFrame* aPopupFrame,
+                                     bool aIsContextMenu,
+                                     bool aSelectFirstItem)
+{
+  nsPopupType popupType = aPopupFrame->PopupType();
+  bool ismenu = (popupType == ePopupTypeMenu);
+
+  nsMenuChainItem* item =
+    new nsMenuChainItem(aPopupFrame, aIsContextMenu, popupType);
+  if (!item)
+    return;
+
+  // install keyboard event listeners for navigating menus. For panels, the
+  // escape key may be used to close the panel. However, the ignorekeys
+  // attribute may be used to disable adding these event listeners for popups
+  // that want to handle their own keyboard events.
+  nsAutoString ignorekeys;
+  aPopup->GetAttr(kNameSpaceID_None, nsGkAtoms::ignorekeys, ignorekeys);
+  if (ignorekeys.EqualsLiteral("true")) {
+    item->SetIgnoreKeys(eIgnoreKeys_True);
+  } else if (ignorekeys.EqualsLiteral("shortcuts")) {
+    item->SetIgnoreKeys(eIgnoreKeys_Shortcuts);
+  }
+
+  if (ismenu) {
+    // if the menu is on a menubar, use the menubar's listener instead
+    nsMenuFrame* menuFrame = do_QueryFrame(aPopupFrame->GetParent());
+    if (menuFrame) {
+      item->SetOnMenuBar(menuFrame->IsOnMenuBar());
+    }
+  }
+
+  // use a weak frame as the popup will set an open attribute if it is a menu
+  nsWeakFrame weakFrame(aPopupFrame);
+  aPopupFrame->ShowPopup(aIsContextMenu);
+  ENSURE_TRUE(weakFrame.IsAlive());
+
+  // popups normally hide when an outside click occurs. Panels may use
+  // the noautohide attribute to disable this behaviour. It is expected
+  // that the application will hide these popups manually. The tooltip
+  // listener will handle closing the tooltip also.
+  if (aPopupFrame->IsNoAutoHide() || popupType == ePopupTypeTooltip) {
+    item->SetParent(mNoHidePanels);
+    mNoHidePanels = item;
+  }
+  else {
+    nsIContent* oldmenu = nullptr;
+    if (mPopups)
+      oldmenu = mPopups->Content();
+    item->SetParent(mPopups);
+    mPopups = item;
+    SetCaptureState(oldmenu);
+  }
+
+  if (aSelectFirstItem) {
+    nsMenuFrame* next = GetNextMenuItem(aPopupFrame, nullptr, true);
+    aPopupFrame->SetCurrentMenuItem(next);
+  }
+
+  if (ismenu)
+    UpdateMenuItems(aPopup);
+
+  // Caret visibility may have been affected, ensure that
+  // the caret isn't now drawn when it shouldn't be.
+  CheckCaretDrawingState();
+}
+
+void
+nsXULPopupManager::HidePopup(nsIContent* aPopup,
+                             bool aHideChain,
+                             bool aDeselectMenu,
+                             bool aAsynchronous,
+                             bool aIsCancel,
+                             nsIContent* aLastPopup)
+{
+  // if the popup is on the nohide panels list, remove it but don't close any
+  // other panels
+  nsMenuPopupFrame* popupFrame = nullptr;
+  bool foundPanel = false;
+  nsMenuChainItem* item = mNoHidePanels;
+  while (item) {
+    if (item->Content() == aPopup) {
+      foundPanel = true;
+      popupFrame = item->Frame();
+      break;
+    }
+    item = item->GetParent();
+  }
+
+  // when removing a menu, all of the child popups must be closed
+  nsMenuChainItem* foundMenu = nullptr;
+  item = mPopups;
+  while (item) {
+    if (item->Content() == aPopup) {
+      foundMenu = item;
+      break;
+    }
+    item = item->GetParent();
+  }
+
+  nsPopupType type = ePopupTypePanel;
+  bool deselectMenu = false;
+  nsCOMPtr<nsIContent> popupToHide, nextPopup, lastPopup;
+  if (foundMenu) {
+    // at this point, foundMenu will be set to the found item in the list. If
+    // foundMenu is the topmost menu, the one to remove, then there are no other
+    // popups to hide. If foundMenu is not the topmost menu, then there may be
+    // open submenus below it. In this case, we need to make sure that those
+    // submenus are closed up first. To do this, we scan up the menu list to
+    // find the topmost popup with only menus between it and foundMenu and
+    // close that menu first. In synchronous mode, the FirePopupHidingEvent
+    // method will be called which in turn calls HidePopupCallback to close up
+    // the next popup in the chain. These two methods will be called in
+    // sequence recursively to close up all the necessary popups. In
+    // asynchronous mode, a similar process occurs except that the
+    // FirePopupHidingEvent method is called asynchronously. In either case,
+    // nextPopup is set to the content node of the next popup to close, and
+    // lastPopup is set to the last popup in the chain to close, which will be
+    // aPopup, or null to close up all menus.
+
+    nsMenuChainItem* topMenu = foundMenu;
+    // Use IsMenu to ensure that foundMenu is a menu and scan down the child
+    // list until a non-menu is found. If foundMenu isn't a menu at all, don't
+    // scan and just close up this menu.
+    if (foundMenu->IsMenu()) {
+      item = topMenu->GetChild();
+      while (item && item->IsMenu()) {
+        topMenu = item;
+        item = item->GetChild();
+      }
+    }
+    
+    deselectMenu = aDeselectMenu;
+    popupToHide = topMenu->Content();
+    popupFrame = topMenu->Frame();
+    type = popupFrame->PopupType();
+
+    nsMenuChainItem* parent = topMenu->GetParent();
+
+    // close up another popup if there is one, and we are either hiding the
+    // entire chain or the item to hide isn't the topmost popup.
+    if (parent && (aHideChain || topMenu != foundMenu))
+      nextPopup = parent->Content();
+
+    lastPopup = aLastPopup ? aLastPopup : (aHideChain ? nullptr : aPopup);
+  }
+  else if (foundPanel) {
+    popupToHide = aPopup;
+  } else {
+    // When the popup is in the popuppositioning state, it will not be in the
+    // mPopups list. We need another way to find it and make sure it does not
+    // continue the popup showing process.
+    popupFrame = do_QueryFrame(aPopup->GetPrimaryFrame());
+    if (popupFrame) {
+      if (popupFrame->PopupState() == ePopupPositioning) {
+        // Do basically the same thing we would have done if we had found the
+        // popup in the mPopups list.
+        deselectMenu = aDeselectMenu;
+        popupToHide = aPopup;
+        type = popupFrame->PopupType();
+      } else {
+        // The popup is not positioning. If we were supposed to have handled
+        // closing it, it should have been in mPopups or mNoHidePanels
+        popupFrame = nullptr;
+      }
+    }
+  }
+
+  if (popupFrame) {
+    nsPopupState state = popupFrame->PopupState();
+    // if the popup is already being hidden, don't attempt to hide it again
+    if (state == ePopupHiding)
+      return;
+    // change the popup state to hiding. Don't set the hiding state if the
+    // popup is invisible, otherwise nsMenuPopupFrame::HidePopup will
+    // run again. In the invisible state, we just want the events to fire.
+    if (state != ePopupInvisible)
+      popupFrame->SetPopupState(ePopupHiding);
+
+    // for menus, popupToHide is always the frontmost item in the list to hide.
+    if (aAsynchronous) {
+      nsCOMPtr<nsIRunnable> event =
+        new nsXULPopupHidingEvent(popupToHide, nextPopup, lastPopup,
+                                  type, deselectMenu, aIsCancel);
+        NS_DispatchToCurrentThread(event);
+    }
+    else {
+      FirePopupHidingEvent(popupToHide, nextPopup, lastPopup,
+                           popupFrame->PresContext(), type, deselectMenu, aIsCancel);
+    }
+  }
+}
+
+// This is used to hide the popup after a transition finishes.
+class TransitionEnder : public nsIDOMEventListener
+{
+protected:
+  virtual ~TransitionEnder() { }
+
+public:
+
+  nsCOMPtr<nsIContent> mContent;
+  bool mDeselectMenu;
+
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_CLASS(TransitionEnder)
+
+  TransitionEnder(nsIContent* aContent, bool aDeselectMenu)
+    : mContent(aContent), mDeselectMenu(aDeselectMenu)
+  {
+  }
+
+  NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent) override
+  {
+    mContent->RemoveSystemEventListener(NS_LITERAL_STRING("transitionend"), this, false);
+
+    nsMenuPopupFrame* popupFrame = do_QueryFrame(mContent->GetPrimaryFrame());
+
+    // Now hide the popup. There could be other properties transitioning, but
+    // we'll assume they all end at the same time and just hide the popup upon
+    // the first one ending.
+    nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
+    if (pm && popupFrame) {
+      pm->HidePopupCallback(mContent, popupFrame, nullptr, nullptr,
+                            popupFrame->PopupType(), mDeselectMenu);
+    }
+
+    return NS_OK;
+  }
+};
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(TransitionEnder)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(TransitionEnder)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(TransitionEnder)
+  NS_INTERFACE_MAP_ENTRY(nsIDOMEventListener)
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTION(TransitionEnder, mContent);
+
+void
+nsXULPopupManager::HidePopupCallback(nsIContent* aPopup,
+                                     nsMenuPopupFrame* aPopupFrame,
+                                     nsIContent* aNextPopup,
+                                     nsIContent* aLastPopup,
+                                     nsPopupType aPopupType,
+                                     bool aDeselectMenu)
+{
+  if (mCloseTimer && mTimerMenu == aPopupFrame) {
+    mCloseTimer->Cancel();
+    mCloseTimer = nullptr;
+    mTimerMenu = nullptr;
+  }
+
+  // The popup to hide is aPopup. Search the list again to find the item that
+  // corresponds to the popup to hide aPopup. This is done because it's
+  // possible someone added another item (attempted to open another popup)
+  // or removed a popup frame during the event processing so the item isn't at
+  // the front anymore.
+  nsMenuChainItem* item = mNoHidePanels;
+  while (item) {
+    if (item->Content() == aPopup) {
+      item->Detach(&mNoHidePanels);
+      break;
+    }
+    item = item->GetParent();
+  }
+
+  if (!item) {
+    item = mPopups;
+    while (item) {
+      if (item->Content() == aPopup) {
+        item->Detach(&mPopups);
+        SetCaptureState(aPopup);
+        break;
+      }
+      item = item->GetParent();
+    }
+  }
+
+  delete item;
+
+  nsWeakFrame weakFrame(aPopupFrame);
+  aPopupFrame->HidePopup(aDeselectMenu, ePopupClosed);
+  ENSURE_TRUE(weakFrame.IsAlive());
+
+  // send the popuphidden event synchronously. This event has no default
+  // behaviour.
+  nsEventStatus status = nsEventStatus_eIgnore;
+  WidgetMouseEvent event(true, eXULPopupHidden, nullptr,
+                         WidgetMouseEvent::eReal);
+  EventDispatcher::Dispatch(aPopup, aPopupFrame->PresContext(),
+                            &event, nullptr, &status);
+  ENSURE_TRUE(weakFrame.IsAlive());
+
+  // if there are more popups to close, look for the next one
+  if (aNextPopup && aPopup != aLastPopup) {
+    nsMenuChainItem* foundMenu = nullptr;
+    nsMenuChainItem* item = mPopups;
+    while (item) {
+      if (item->Content() == aNextPopup) {
+        foundMenu = item;
+        break;
+      }
+      item = item->GetParent();
+    }
+
+    // continue hiding the chain of popups until the last popup aLastPopup
+    // is reached, or until a popup of a different type is reached. This
+    // last check is needed so that a menulist inside a non-menu panel only
+    // closes the menu and not the panel as well.
+    if (foundMenu &&
+        (aLastPopup || aPopupType == foundMenu->PopupType())) {
+
+      nsCOMPtr<nsIContent> popupToHide = item->Content();
+      nsMenuChainItem* parent = item->GetParent();
+
+      nsCOMPtr<nsIContent> nextPopup;
+      if (parent && popupToHide != aLastPopup)
+        nextPopup = parent->Content();
+
+      nsMenuPopupFrame* popupFrame = item->Frame();
+      nsPopupState state = popupFrame->PopupState();
+      if (state == ePopupHiding)
+        return;
+      if (state != ePopupInvisible)
+        popupFrame->SetPopupState(ePopupHiding);
+
+      FirePopupHidingEvent(popupToHide, nextPopup, aLastPopup,
+                           popupFrame->PresContext(),
+                           foundMenu->PopupType(), aDeselectMenu, false);
+    }
+  }
+}
+
+void
+nsXULPopupManager::HidePopup(nsIFrame* aFrame)
+{
+  nsMenuPopupFrame* popup = do_QueryFrame(aFrame);
+  if (popup)
+    HidePopup(aFrame->GetContent(), false, true, false, false);
+}
+
+void
+nsXULPopupManager::HidePopupAfterDelay(nsMenuPopupFrame* aPopup)
+{
+  // Don't close up immediately.
+  // Kick off a close timer.
+  KillMenuTimer();
+
+  int32_t menuDelay =
+    LookAndFeel::GetInt(LookAndFeel::eIntID_SubmenuDelay, 300); // ms
+
+  // Kick off the timer.
+  mCloseTimer = do_CreateInstance("@mozilla.org/timer;1");
+  mCloseTimer->InitWithCallback(this, menuDelay, nsITimer::TYPE_ONE_SHOT);
+
+  // the popup will call PopupDestroyed if it is destroyed, which checks if it
+  // is set to mTimerMenu, so it should be safe to keep a reference to it
+  mTimerMenu = aPopup;
+}
+
+void
+nsXULPopupManager::HidePopupsInList(const nsTArray<nsMenuPopupFrame *> &aFrames)
+{
+  // Create a weak frame list. This is done in a separate array with the
+  // right capacity predetermined, otherwise the array would get resized and
+  // move the weak frame pointers around.
+  nsTArray<nsWeakFrame> weakPopups(aFrames.Length());
+  uint32_t f;
+  for (f = 0; f < aFrames.Length(); f++) {
+    nsWeakFrame* wframe = weakPopups.AppendElement();
+    if (wframe)
+      *wframe = aFrames[f];
+  }
+
+  for (f = 0; f < weakPopups.Length(); f++) {
+    // check to ensure that the frame is still alive before hiding it.
+    if (weakPopups[f].IsAlive()) {
+      nsMenuPopupFrame* frame =
+        static_cast<nsMenuPopupFrame *>(weakPopups[f].GetFrame());
+      frame->HidePopup(true, ePopupInvisible);
+    }
+  }
+
+  SetCaptureState(nullptr);
+}
+
+void
+nsXULPopupManager::EnableRollup(nsIContent* aPopup, bool aShouldRollup)
+{
+#ifndef MOZ_GTK
+  if (aShouldRollup) {
+    nsMenuChainItem* item = mNoHidePanels;
+    while (item) {
+      if (item->Content() == aPopup) {
+        item->Detach(&mNoHidePanels);
+        nsIContent* oldmenu = nullptr;
+        if (mPopups)
+          oldmenu = mPopups->Content();
+        item->SetParent(mPopups);
+        mPopups = item;
+        SetCaptureState(oldmenu);
+        return;
+      }
+      item = item->GetParent();
+    }
+  } else {
+    nsMenuChainItem* item = mPopups;
+    while (item) {
+      if (item->Content() == aPopup) {
+        item->Detach(&mPopups);
+        item->SetParent(mNoHidePanels);
+        mNoHidePanels = item;
+        SetCaptureState(nullptr);
+        return;
+      }
+      item = item->GetParent();
+    }
+  }
+#endif
+}
+
+bool
+nsXULPopupManager::IsChildOfDocShell(nsIDocument* aDoc, nsIDocShellTreeItem* aExpected)
+{
+  nsCOMPtr<nsIDocShellTreeItem> docShellItem(aDoc->GetDocShell());
+  while(docShellItem) {
+    if (docShellItem == aExpected)
+      return true;
+
+    nsCOMPtr<nsIDocShellTreeItem> parent;
+    docShellItem->GetParent(getter_AddRefs(parent));
+    docShellItem = parent;
+  }
+
+  return false;
+}
+
+void
+nsXULPopupManager::HidePopupsInDocShell(nsIDocShellTreeItem* aDocShellToHide)
+{
+  nsTArray<nsMenuPopupFrame *> popupsToHide;
+
+  // iterate to get the set of popup frames to hide
+  nsMenuChainItem* item = mPopups;
+  while (item) {
+    nsMenuChainItem* parent = item->GetParent();
+    if (item->Frame()->PopupState() != ePopupInvisible &&
+        IsChildOfDocShell(item->Content()->OwnerDoc(), aDocShellToHide)) {
+      nsMenuPopupFrame* frame = item->Frame();
+      item->Detach(&mPopups);
+      delete item;
+      popupsToHide.AppendElement(frame);
+    }
+    item = parent;
+  }
+
+  // now look for panels to hide
+  item = mNoHidePanels;
+  while (item) {
+    nsMenuChainItem* parent = item->GetParent();
+    if (item->Frame()->PopupState() != ePopupInvisible &&
+        IsChildOfDocShell(item->Content()->OwnerDoc(), aDocShellToHide)) {
+      nsMenuPopupFrame* frame = item->Frame();
+      item->Detach(&mNoHidePanels);
+      delete item;
+      popupsToHide.AppendElement(frame);
+    }
+    item = parent;
+  }
+
+  HidePopupsInList(popupsToHide);
+}
+
+void
+nsXULPopupManager::ExecuteMenu(nsIContent* aMenu, nsXULMenuCommandEvent* aEvent)
+{
+  CloseMenuMode cmm = CloseMenuMode_Auto;
+
+  static nsIContent::AttrValuesArray strings[] =
+    {&nsGkAtoms::none, &nsGkAtoms::single, nullptr};
+
+  switch (aMenu->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::closemenu,
+                                 strings, eCaseMatters)) {
+    case 0:
+      cmm = CloseMenuMode_None;
+      break;
+    case 1:
+      cmm = CloseMenuMode_Single;
+      break;
+    default:
+      break;
+  }
+
+  // When a menuitem is selected to be executed, first hide all the open
+  // popups, but don't remove them yet. This is needed when a menu command
+  // opens a modal dialog. The views associated with the popups needed to be
+  // hidden and the accesibility events fired before the command executes, but
+  // the popuphiding/popuphidden events are fired afterwards.
+  nsTArray<nsMenuPopupFrame *> popupsToHide;
+  nsMenuChainItem* item = GetTopVisibleMenu();
+  if (cmm != CloseMenuMode_None) {
+    while (item) {
+      // if it isn't a <menupopup>, don't close it automatically
+      if (!item->IsMenu())
+        break;
+      nsMenuChainItem* next = item->GetParent();
+      popupsToHide.AppendElement(item->Frame());
+      if (cmm == CloseMenuMode_Single) // only close one level of menu
+        break;
+      item = next;
+    }
+
+    // Now hide the popups. If the closemenu mode is auto, deselect the menu,
+    // otherwise only one popup is closing, so keep the parent menu selected.
+    HidePopupsInList(popupsToHide);
+  }
+
+  aEvent->SetCloseMenuMode(cmm);
+  nsCOMPtr<nsIRunnable> event = aEvent;
+  NS_DispatchToCurrentThread(event);
+}
+
+void
+nsXULPopupManager::FirePopupShowingEvent(nsIContent* aPopup,
+                                         bool aIsContextMenu,
+                                         bool aSelectFirstItem)
+{
+  nsCOMPtr<nsIContent> popup = aPopup; // keep a strong reference to the popup
+
+  nsMenuPopupFrame* popupFrame = do_QueryFrame(aPopup->GetPrimaryFrame());
+  if (!popupFrame)
+    return;
+
+  nsPresContext *presContext = popupFrame->PresContext();
+  nsCOMPtr<nsIPresShell> presShell = presContext->PresShell();
+  nsPopupType popupType = popupFrame->PopupType();
+
+  // generate the child frames if they have not already been generated
+  if (!popupFrame->HasGeneratedChildren()) {
+    popupFrame->SetGeneratedChildren();
+    presShell->FrameConstructor()->GenerateChildFrames(popupFrame);
+  }
+
+  // get the frame again
+  nsIFrame* frame = aPopup->GetPrimaryFrame();
+  if (!frame)
+    return;
+
+  presShell->FrameNeedsReflow(frame, nsIPresShell::eTreeChange,
+                              NS_FRAME_HAS_DIRTY_CHILDREN);
+
+  // cache the popup so that document.popupNode can retrieve the trigger node
+  // during the popupshowing event. It will be cleared below after the event
+  // has fired.
+  mOpeningPopup = aPopup;
+
+  nsEventStatus status = nsEventStatus_eIgnore;
+  WidgetMouseEvent event(true, eXULPopupShowing, nullptr,
+                         WidgetMouseEvent::eReal);
+
+  // coordinates are relative to the root widget
+  nsPresContext* rootPresContext =
+    presShell->GetPresContext()->GetRootPresContext();
+  if (rootPresContext) {
+    rootPresContext->PresShell()->GetViewManager()->
+      GetRootWidget(getter_AddRefs(event.mWidget));
+  }
+  else {
+    event.mWidget = nullptr;
+  }
+
+  event.mRefPoint = mCachedMousePoint;
+  event.mModifiers = mCachedModifiers;
+  EventDispatcher::Dispatch(popup, presContext, &event, nullptr, &status);
+
+  mCachedMousePoint = LayoutDeviceIntPoint(0, 0);
+  mOpeningPopup = nullptr;
+
+  mCachedModifiers = 0;
+
+  // if a panel, blur whatever has focus so that the panel can take the focus.
+  // This is done after the popupshowing event in case that event is cancelled.
+  // Using noautofocus="true" will disable this behaviour, which is needed for
+  // the autocomplete widget as it manages focus itself.
+  if (popupType == ePopupTypePanel &&
+      !popup->AttrValueIs(kNameSpaceID_None, nsGkAtoms::noautofocus,
+                           nsGkAtoms::_true, eCaseMatters)) {
+    nsIFocusManager* fm = nsFocusManager::GetFocusManager();
+    if (fm) {
+      nsIDocument* doc = popup->GetUncomposedDoc();
+
+      // Only remove the focus if the currently focused item is ouside the
+      // popup. It isn't a big deal if the current focus is in a child popup
+      // inside the popup as that shouldn't be visible. This check ensures that
+      // a node inside the popup that is focused during a popupshowing event
+      // remains focused.
+      nsCOMPtr<nsIDOMElement> currentFocusElement;
+      fm->GetFocusedElement(getter_AddRefs(currentFocusElement));
+      nsCOMPtr<nsIContent> currentFocus = do_QueryInterface(currentFocusElement);
+      if (doc && currentFocus &&
+          !nsContentUtils::ContentIsCrossDocDescendantOf(currentFocus, popup)) {
+        fm->ClearFocus(doc->GetWindow());
+      }
+    }
+  }
+
+  // clear these as they are no longer valid
+  mRangeParent = nullptr;
+  mRangeOffset = 0;
+
+  // get the frame again in case it went away
+  popupFrame = do_QueryFrame(aPopup->GetPrimaryFrame());
+  if (popupFrame) {
+    // if the event was cancelled, don't open the popup, reset its state back
+    // to closed and clear its trigger content.
+    if (status == nsEventStatus_eConsumeNoDefault) {
+      popupFrame->SetPopupState(ePopupClosed);
+      popupFrame->ClearTriggerContent();
+    }
+    else {
+      // Now check if we need to fire the popuppositioned event. If not, call
+      // ShowPopupCallback directly.
+
+      // The popuppositioned event only fires on arrow panels for now.
+      if (popup->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
+                          nsGkAtoms::arrow, eCaseMatters)) {
+        popupFrame->ShowWithPositionedEvent();
+        presShell->FrameNeedsReflow(popupFrame, nsIPresShell::eTreeChange,
+                                    NS_FRAME_HAS_DIRTY_CHILDREN);
+      }
+      else {
+        ShowPopupCallback(popup, popupFrame, aIsContextMenu, aSelectFirstItem);
+      }
+    }
+  }
+}
+
+void
+nsXULPopupManager::FirePopupHidingEvent(nsIContent* aPopup,
+                                        nsIContent* aNextPopup,
+                                        nsIContent* aLastPopup,
+                                        nsPresContext *aPresContext,
+                                        nsPopupType aPopupType,
+                                        bool aDeselectMenu,
+                                        bool aIsCancel)
+{
+  nsCOMPtr<nsIPresShell> presShell = aPresContext->PresShell();
+  mozilla::Unused << presShell; // This presShell may be keeping things alive on non GTK platforms
+
+  nsEventStatus status = nsEventStatus_eIgnore;
+  WidgetMouseEvent event(true, eXULPopupHiding, nullptr,
+                         WidgetMouseEvent::eReal);
+  EventDispatcher::Dispatch(aPopup, aPresContext, &event, nullptr, &status);
+
+  // when a panel is closed, blur whatever has focus inside the popup
+  if (aPopupType == ePopupTypePanel &&
+      !aPopup->AttrValueIs(kNameSpaceID_None, nsGkAtoms::noautofocus,
+                           nsGkAtoms::_true, eCaseMatters)) {
+    nsIFocusManager* fm = nsFocusManager::GetFocusManager();
+    if (fm) {
+      nsIDocument* doc = aPopup->GetUncomposedDoc();
+
+      // Remove the focus from the focused node only if it is inside the popup.
+      nsCOMPtr<nsIDOMElement> currentFocusElement;
+      fm->GetFocusedElement(getter_AddRefs(currentFocusElement));
+      nsCOMPtr<nsIContent> currentFocus = do_QueryInterface(currentFocusElement);
+      if (doc && currentFocus &&
+          nsContentUtils::ContentIsCrossDocDescendantOf(currentFocus, aPopup)) {
+        fm->ClearFocus(doc->GetWindow());
+      }
+    }
+  }
+
+  // get frame again in case it went away
+  nsMenuPopupFrame* popupFrame = do_QueryFrame(aPopup->GetPrimaryFrame());
+  if (popupFrame) {
+    // if the event was cancelled, don't hide the popup, and reset its
+    // state back to open. Only popups in chrome shells can prevent a popup
+    // from hiding.
+    if (status == nsEventStatus_eConsumeNoDefault &&
+        !popupFrame->IsInContentShell()) {
+      // XXXndeakin
+      // If an attempt was made to hide this popup before the popupshown event
+      // fired, then ePopupShown is set here even though it should be
+      // ePopupVisible. This probably isn't worth the hassle of handling.
+      popupFrame->SetPopupState(ePopupShown);
+    }
+    else {
+      // If the popup has an animate attribute and it is not set to false, check
+      // if it has a closing transition and wait for it to finish. The transition
+      // may still occur either way, but the view will be hidden and you won't be
+      // able to see it. If there is a next popup, indicating that mutliple popups
+      // are rolling up, don't wait and hide the popup right away since the effect
+      // would likely be undesirable. Transitions are currently disabled on Linux
+      // due to rendering issues on certain configurations.
+#ifndef MOZ_WIDGET_GTK
+      if (!aNextPopup && aPopup->HasAttr(kNameSpaceID_None, nsGkAtoms::animate)) {
+        // If animate="false" then don't transition at all. If animate="cancel",
+        // only show the transition if cancelling the popup or rolling up.
+        // Otherwise, always show the transition.
+        nsAutoString animate;
+        aPopup->GetAttr(kNameSpaceID_None, nsGkAtoms::animate, animate);
+
+        if (!animate.EqualsLiteral("false") &&
+            (!animate.EqualsLiteral("cancel") || aIsCancel)) {
+          presShell->FlushPendingNotifications(Flush_Layout);
+
+          // Get the frame again in case the flush caused it to go away
+          popupFrame = do_QueryFrame(aPopup->GetPrimaryFrame());
+          if (!popupFrame)
+            return;
+
+          if (nsLayoutUtils::HasCurrentTransitions(popupFrame)) {
+            RefPtr<TransitionEnder> ender = new TransitionEnder(aPopup, aDeselectMenu);
+            aPopup->AddSystemEventListener(NS_LITERAL_STRING("transitionend"),
+                                           ender, false, false);
+            return;
+          }
+        }
+      }
+#endif
+
+      HidePopupCallback(aPopup, popupFrame, aNextPopup, aLastPopup,
+                        aPopupType, aDeselectMenu);
+    }
+  }
+}
+
+bool
+nsXULPopupManager::IsPopupOpen(nsIContent* aPopup)
+{
+  // a popup is open if it is in the open list. The assertions ensure that the
+  // frame is in the correct state. If the popup is in the hiding or invisible
+  // state, it will still be in the open popup list until it is closed.
+  nsMenuChainItem* item = mPopups;
+  while (item) {
+    if (item->Content() == aPopup) {
+      NS_ASSERTION(item->Frame()->IsOpen() ||
+                   item->Frame()->PopupState() == ePopupHiding ||
+                   item->Frame()->PopupState() == ePopupInvisible,
+                   "popup in open list not actually open");
+      return true;
+    }
+    item = item->GetParent();
+  }
+
+  item = mNoHidePanels;
+  while (item) {
+    if (item->Content() == aPopup) {
+      NS_ASSERTION(item->Frame()->IsOpen() ||
+                   item->Frame()->PopupState() == ePopupHiding ||
+                   item->Frame()->PopupState() == ePopupInvisible,
+                   "popup in open list not actually open");
+      return true;
+    }
+    item = item->GetParent();
+  }
+
+  return false;
+}
+
+bool
+nsXULPopupManager::IsPopupOpenForMenuParent(nsMenuParent* aMenuParent)
+{
+  nsMenuChainItem* item = GetTopVisibleMenu();
+  while (item) {
+    nsMenuPopupFrame* popup = item->Frame();
+    if (popup && popup->IsOpen()) {
+      nsMenuFrame* menuFrame = do_QueryFrame(popup->GetParent());
+      if (menuFrame && menuFrame->GetMenuParent() == aMenuParent) {
+        return true;
+      }
+    }
+    item = item->GetParent();
+  }
+
+  return false;
+}
+
+nsIFrame*
+nsXULPopupManager::GetTopPopup(nsPopupType aType)
+{
+  if ((aType == ePopupTypePanel || aType == ePopupTypeTooltip) && mNoHidePanels)
+    return mNoHidePanels->Frame();
+
+  nsMenuChainItem* item = GetTopVisibleMenu();
+  while (item) {
+    if (item->PopupType() == aType || aType == ePopupTypeAny)
+      return item->Frame();
+    item = item->GetParent();
+  }
+
+  return nullptr;
+}
+
+void
+nsXULPopupManager::GetVisiblePopups(nsTArray<nsIFrame *>& aPopups)
+{
+  aPopups.Clear();
+
+  // Iterate over both lists of popups
+  nsMenuChainItem* item = mPopups;
+  for (int32_t list = 0; list < 2; list++) {
+    while (item) {
+      // Skip panels which are not visible as well as popups that
+      // are transparent to mouse events.
+      if (item->Frame()->IsVisible() && !item->Frame()->IsMouseTransparent()) {
+        aPopups.AppendElement(item->Frame());
+      }
+
+      item = item->GetParent();
+    }
+
+    item = mNoHidePanels;
+  }
+}
+
+already_AddRefed<nsIDOMNode>
+nsXULPopupManager::GetLastTriggerNode(nsIDocument* aDocument, bool aIsTooltip)
+{
+  if (!aDocument)
+    return nullptr;
+
+  nsCOMPtr<nsIDOMNode> node;
+
+  // if mOpeningPopup is set, it means that a popupshowing event is being
+  // fired. In this case, just use the cached node, as the popup is not yet in
+  // the list of open popups.
+  if (mOpeningPopup && mOpeningPopup->GetUncomposedDoc() == aDocument &&
+      aIsTooltip == mOpeningPopup->IsXULElement(nsGkAtoms::tooltip)) {
+    node = do_QueryInterface(nsMenuPopupFrame::GetTriggerContent(GetPopupFrameForContent(mOpeningPopup, false)));
+  }
+  else {
+    nsMenuChainItem* item = aIsTooltip ? mNoHidePanels : mPopups;
+    while (item) {
+      // look for a popup of the same type and document.
+      if ((item->PopupType() == ePopupTypeTooltip) == aIsTooltip &&
+          item->Content()->GetUncomposedDoc() == aDocument) {
+        node = do_QueryInterface(nsMenuPopupFrame::GetTriggerContent(item->Frame()));
+        if (node)
+          break;
+      }
+      item = item->GetParent();
+    }
+  }
+
+  return node.forget();
+}
+
+bool
+nsXULPopupManager::MayShowPopup(nsMenuPopupFrame* aPopup)
+{
+  // if a popup's IsOpen method returns true, then the popup must always be in
+  // the popup chain scanned in IsPopupOpen.
+  NS_ASSERTION(!aPopup->IsOpen() || IsPopupOpen(aPopup->GetContent()),
+               "popup frame state doesn't match XULPopupManager open state");
+
+  nsPopupState state = aPopup->PopupState();
+
+  // if the popup is not in the open popup chain, then it must have a state that
+  // is either closed, in the process of being shown, or invisible.
+  NS_ASSERTION(IsPopupOpen(aPopup->GetContent()) || state == ePopupClosed ||
+               state == ePopupShowing || state == ePopupPositioning ||
+               state == ePopupInvisible,
+               "popup not in XULPopupManager open list is open");
+
+  // don't show popups unless they are closed or invisible
+  if (state != ePopupClosed && state != ePopupInvisible)
+    return false;
+
+  // Don't show popups that we already have in our popup chain
+  if (IsPopupOpen(aPopup->GetContent())) {
+    NS_WARNING("Refusing to show duplicate popup");
+    return false;
+  }
+
+  // if the popup was just rolled up, don't reopen it
+  nsCOMPtr<nsIWidget> widget = aPopup->GetWidget();
+  if (widget && widget->GetLastRollup() == aPopup->GetContent())
+      return false;
+
+  nsCOMPtr<nsIDocShellTreeItem> dsti = aPopup->PresContext()->GetDocShell();
+  nsCOMPtr<nsIBaseWindow> baseWin = do_QueryInterface(dsti);
+  if (!baseWin)
+    return false;
+
+  nsCOMPtr<nsIDocShellTreeItem> root;
+  dsti->GetRootTreeItem(getter_AddRefs(root));
+  if (!root) {
+    return false;
+  }
+
+  nsCOMPtr<nsPIDOMWindowOuter> rootWin = root->GetWindow();
+
+  // chrome shells can always open popups, but other types of shells can only
+  // open popups when they are focused and visible
+  if (dsti->ItemType() != nsIDocShellTreeItem::typeChrome) {
+    // only allow popups in active windows
+    nsIFocusManager* fm = nsFocusManager::GetFocusManager();
+    if (!fm || !rootWin)
+      return false;
+
+    nsCOMPtr<mozIDOMWindowProxy> activeWindow;
+    fm->GetActiveWindow(getter_AddRefs(activeWindow));
+    if (activeWindow != rootWin)
+      return false;
+
+    // only allow popups in visible frames
+    bool visible;
+    baseWin->GetVisibility(&visible);
+    if (!visible)
+      return false;
+  }
+
+  // platforms respond differently when an popup is opened in a minimized
+  // window, so this is always disabled.
+  nsCOMPtr<nsIWidget> mainWidget;
+  baseWin->GetMainWidget(getter_AddRefs(mainWidget));
+  if (mainWidget && mainWidget->SizeMode() == nsSizeMode_Minimized) {
+    return false;
+  }
+
+#ifdef XP_MACOSX
+  if (rootWin) {
+    auto globalWin = nsGlobalWindow::Cast(rootWin.get());
+    if (globalWin->IsInModalState()) {
+      return false;
+    }
+  }
+#endif
+
+  // cannot open a popup that is a submenu of a menupopup that isn't open.
+  nsMenuFrame* menuFrame = do_QueryFrame(aPopup->GetParent());
+  if (menuFrame) {
+    nsMenuParent* parentPopup = menuFrame->GetMenuParent();
+    if (parentPopup && !parentPopup->IsOpen())
+      return false;
+  }
+
+  return true;
+}
+
+void
+nsXULPopupManager::PopupDestroyed(nsMenuPopupFrame* aPopup)
+{
+  // when a popup frame is destroyed, just unhook it from the list of popups
+  if (mTimerMenu == aPopup) {
+    if (mCloseTimer) {
+      mCloseTimer->Cancel();
+      mCloseTimer = nullptr;
+    }
+    mTimerMenu = nullptr;
+  }
+
+  nsMenuChainItem* item = mNoHidePanels;
+  while (item) {
+    if (item->Frame() == aPopup) {
+      item->Detach(&mNoHidePanels);
+      delete item;
+      break;
+    }
+    item = item->GetParent();
+  }
+
+  nsTArray<nsMenuPopupFrame *> popupsToHide;
+
+  item = mPopups;
+  while (item) {
+    nsMenuPopupFrame* frame = item->Frame();
+    if (frame == aPopup) {
+      if (frame->PopupState() != ePopupInvisible) {
+        // Iterate through any child menus and hide them as well, since the
+        // parent is going away. We won't remove them from the list yet, just
+        // hide them, as they will be removed from the list when this function
+        // gets called for that child frame.
+        nsMenuChainItem* child = item->GetChild();
+        while (child) {
+          // if the popup is a child frame of the menu that was destroyed, add
+          // it to the list of popups to hide. Don't bother with the events
+          // since the frames are going away. If the child menu is not a child
+          // frame, for example, a context menu, use HidePopup instead, but call
+          // it asynchronously since we are in the middle of frame destruction.
+          nsMenuPopupFrame* childframe = child->Frame();
+          if (nsLayoutUtils::IsProperAncestorFrame(frame, childframe)) {
+            popupsToHide.AppendElement(childframe);
+          }
+          else {
+            // HidePopup will take care of hiding any of its children, so
+            // break out afterwards
+            HidePopup(child->Content(), false, false, true, false);
+            break;
+          }
+
+          child = child->GetChild();
+        }
+      }
+
+      item->Detach(&mPopups);
+      delete item;
+      break;
+    }
+
+    item = item->GetParent();
+  }
+
+  HidePopupsInList(popupsToHide);
+}
+
+bool
+nsXULPopupManager::HasContextMenu(nsMenuPopupFrame* aPopup)
+{
+  nsMenuChainItem* item = GetTopVisibleMenu();
+  while (item && item->Frame() != aPopup) {
+    if (item->IsContextMenu())
+      return true;
+    item = item->GetParent();
+  }
+
+  return false;
+}
+
+void
+nsXULPopupManager::SetCaptureState(nsIContent* aOldPopup)
+{
+  nsMenuChainItem* item = GetTopVisibleMenu();
+  if (item && aOldPopup == item->Content())
+    return;
+
+  if (mWidget) {
+    mWidget->CaptureRollupEvents(nullptr, false);
+    mWidget = nullptr;
+  }
+
+  if (item) {
+    nsMenuPopupFrame* popup = item->Frame();
+    mWidget = popup->GetWidget();
+    if (mWidget) {
+      mWidget->CaptureRollupEvents(nullptr, true);
+      popup->AttachedDismissalListener();
+    }
+  }
+
+  UpdateKeyboardListeners();
+}
+
+void
+nsXULPopupManager::UpdateKeyboardListeners()
+{
+  nsCOMPtr<EventTarget> newTarget;
+  bool isForMenu = false;
+  nsMenuChainItem* item = GetTopVisibleMenu();
+  if (item) {
+    if (item->IgnoreKeys() != eIgnoreKeys_True) {
+      newTarget = item->Content()->GetComposedDoc();
+    }
+    isForMenu = item->PopupType() == ePopupTypeMenu;
+  }
+  else if (mActiveMenuBar) {
+    newTarget = mActiveMenuBar->GetContent()->GetComposedDoc();
+    isForMenu = true;
+  }
+
+  if (mKeyListener != newTarget) {
+    if (mKeyListener) {
+      mKeyListener->RemoveEventListener(NS_LITERAL_STRING("keypress"), this, true);
+      mKeyListener->RemoveEventListener(NS_LITERAL_STRING("keydown"), this, true);
+      mKeyListener->RemoveEventListener(NS_LITERAL_STRING("keyup"), this, true);
+      mKeyListener = nullptr;
+      nsContentUtils::NotifyInstalledMenuKeyboardListener(false);
+    }
+
+    if (newTarget) {
+      newTarget->AddEventListener(NS_LITERAL_STRING("keypress"), this, true);
+      newTarget->AddEventListener(NS_LITERAL_STRING("keydown"), this, true);
+      newTarget->AddEventListener(NS_LITERAL_STRING("keyup"), this, true);
+      nsContentUtils::NotifyInstalledMenuKeyboardListener(isForMenu);
+      mKeyListener = newTarget;
+    }
+  }
+}
+
+void
+nsXULPopupManager::UpdateMenuItems(nsIContent* aPopup)
+{
+  // Walk all of the menu's children, checking to see if any of them has a
+  // command attribute. If so, then several attributes must potentially be updated.
+
+  nsCOMPtr<nsIDocument> document = aPopup->GetUncomposedDoc();
+  if (!document) {
+    return;
+  }
+
+  for (nsCOMPtr<nsIContent> grandChild = aPopup->GetFirstChild();
+       grandChild;
+       grandChild = grandChild->GetNextSibling()) {
+    if (grandChild->IsXULElement(nsGkAtoms::menugroup)) {
+      if (grandChild->GetChildCount() == 0) {
+        continue;
+      }
+      grandChild = grandChild->GetFirstChild();
+    }
+    if (grandChild->IsXULElement(nsGkAtoms::menuitem)) {
+      // See if we have a command attribute.
+      nsAutoString command;
+      grandChild->GetAttr(kNameSpaceID_None, nsGkAtoms::command, command);
+      if (!command.IsEmpty()) {
+        // We do! Look it up in our document
+        RefPtr<dom::Element> commandElement =
+          document->GetElementById(command);
+        if (commandElement) {
+          nsAutoString commandValue;
+          // The menu's disabled state needs to be updated to match the command.
+          if (commandElement->GetAttr(kNameSpaceID_None, nsGkAtoms::disabled, commandValue))
+            grandChild->SetAttr(kNameSpaceID_None, nsGkAtoms::disabled, commandValue, true);
+          else
+            grandChild->UnsetAttr(kNameSpaceID_None, nsGkAtoms::disabled, true);
+
+          // The menu's label, accesskey checked and hidden states need to be updated
+          // to match the command. Note that unlike the disabled state if the
+          // command has *no* value, we assume the menu is supplying its own.
+          if (commandElement->GetAttr(kNameSpaceID_None, nsGkAtoms::label, commandValue))
+            grandChild->SetAttr(kNameSpaceID_None, nsGkAtoms::label, commandValue, true);
+
+          if (commandElement->GetAttr(kNameSpaceID_None, nsGkAtoms::accesskey, commandValue))
+            grandChild->SetAttr(kNameSpaceID_None, nsGkAtoms::accesskey, commandValue, true);
+
+          if (commandElement->GetAttr(kNameSpaceID_None, nsGkAtoms::checked, commandValue))
+            grandChild->SetAttr(kNameSpaceID_None, nsGkAtoms::checked, commandValue, true);
+
+          if (commandElement->GetAttr(kNameSpaceID_None, nsGkAtoms::hidden, commandValue))
+            grandChild->SetAttr(kNameSpaceID_None, nsGkAtoms::hidden, commandValue, true);
+        }
+      }
+    }
+    if (!grandChild->GetNextSibling() &&
+        grandChild->GetParent()->IsXULElement(nsGkAtoms::menugroup)) {
+      grandChild = grandChild->GetParent();
+    }
+  }
+}
+
+// Notify
+//
+// The item selection timer has fired, we might have to readjust the 
+// selected item. There are two cases here that we are trying to deal with:
+//   (1) diagonal movement from a parent menu to a submenu passing briefly over
+//       other items, and
+//   (2) moving out from a submenu to a parent or grandparent menu.
+// In both cases, |mTimerMenu| is the menu item that might have an open submenu and
+// the first item in |mPopups| is the item the mouse is currently over, which could be
+// none of them.
+//
+// case (1):
+//  As the mouse moves from the parent item of a submenu (we'll call 'A') diagonally into the
+//  submenu, it probably passes through one or more sibilings (B). As the mouse passes
+//  through B, it becomes the current menu item and the timer is set and mTimerMenu is 
+//  set to A. Before the timer fires, the mouse leaves the menu containing A and B and
+//  enters the submenus. Now when the timer fires, |mPopups| is null (!= |mTimerMenu|)
+//  so we have to see if anything in A's children is selected (recall that even disabled
+//  items are selected, the style just doesn't show it). If that is the case, we need to
+//  set the selected item back to A.
+//
+// case (2);
+//  Item A has an open submenu, and in it there is an item (B) which also has an open
+//  submenu (so there are 3 menus displayed right now). The mouse then leaves B's child
+//  submenu and selects an item that is a sibling of A, call it C. When the mouse enters C,
+//  the timer is set and |mTimerMenu| is A and |mPopups| is C. As the timer fires,
+//  the mouse is still within C. The correct behavior is to set the current item to C
+//  and close up the chain parented at A.
+//
+//  This brings up the question of is the logic of case (1) enough? The answer is no,
+//  and is discussed in bugzilla bug 29400. Case (1) asks if A's submenu has a selected
+//  child, and if it does, set the selected item to A. Because B has a submenu open, it
+//  is selected and as a result, A is set to be the selected item even though the mouse
+//  rests in C -- very wrong. 
+//
+//  The solution is to use the same idea, but instead of only checking one level, 
+//  drill all the way down to the deepest open submenu and check if it has something 
+//  selected. Since the mouse is in a grandparent, it won't, and we know that we can
+//  safely close up A and all its children.
+//
+// The code below melds the two cases together.
+//
+nsresult
+nsXULPopupManager::Notify(nsITimer* aTimer)
+{
+  if (aTimer == mCloseTimer)
+    KillMenuTimer();
+
+  return NS_OK;
+}
+
+void
+nsXULPopupManager::KillMenuTimer()
+{
+  if (mCloseTimer && mTimerMenu) {
+    mCloseTimer->Cancel();
+    mCloseTimer = nullptr;
+
+    if (mTimerMenu->IsOpen())
+      HidePopup(mTimerMenu->GetContent(), false, false, true, false);
+  }
+
+  mTimerMenu = nullptr;
+}
+
+void
+nsXULPopupManager::CancelMenuTimer(nsMenuParent* aMenuParent)
+{
+  if (mCloseTimer && mTimerMenu == aMenuParent) {
+    mCloseTimer->Cancel();
+    mCloseTimer = nullptr;
+    mTimerMenu = nullptr;
+  }
+}
+
+bool
+nsXULPopupManager::HandleShortcutNavigation(nsIDOMKeyEvent* aKeyEvent,
+                                            nsMenuPopupFrame* aFrame)
+{
+  // On Windows, don't check shortcuts when the accelerator key is down.
+#ifdef XP_WIN
+  WidgetInputEvent* evt = aKeyEvent->AsEvent()->WidgetEventPtr()->AsInputEvent();
+  if (evt && evt->IsAccel()) {
+    return false;
+  }
+#endif
+
+  nsMenuChainItem* item = GetTopVisibleMenu();
+  if (!aFrame && item)
+    aFrame = item->Frame();
+
+  if (aFrame) {
+    bool action;
+    nsMenuFrame* result = aFrame->FindMenuWithShortcut(aKeyEvent, action);
+    if (result) {
+      aFrame->ChangeMenuItem(result, false, true);
+      if (action) {
+        WidgetGUIEvent* evt = aKeyEvent->AsEvent()->WidgetEventPtr()->AsGUIEvent();
+        nsMenuFrame* menuToOpen = result->Enter(evt);
+        if (menuToOpen) {
+          nsCOMPtr<nsIContent> content = menuToOpen->GetContent();
+          ShowMenu(content, true, false);
+        }
+      }
+      return true;
+    }
+
+    return false;
+  }
+
+  if (mActiveMenuBar) {
+    nsMenuFrame* result = mActiveMenuBar->FindMenuWithShortcut(aKeyEvent);
+    if (result) {
+      mActiveMenuBar->SetActive(true);
+      result->OpenMenu(true);
+      return true;
+    }
+  }
+
+  return false;
+}
+
+
+bool
+nsXULPopupManager::HandleKeyboardNavigation(uint32_t aKeyCode)
+{
+  // navigate up through the open menus, looking for the topmost one
+  // in the same hierarchy
+  nsMenuChainItem* item = nullptr;
+  nsMenuChainItem* nextitem = GetTopVisibleMenu();
+
+  while (nextitem) {
+    item = nextitem;
+    nextitem = item->GetParent();
+
+    if (nextitem) {
+      // stop if the parent isn't a menu
+      if (!nextitem->IsMenu())
+        break;
+
+      // check to make sure that the parent is actually the parent menu. It won't
+      // be if the parent is in a different frame hierarchy, for example, for a
+      // context menu opened on another menu.
+      nsMenuParent* expectedParent = static_cast<nsMenuParent *>(nextitem->Frame());
+      nsMenuFrame* menuFrame = do_QueryFrame(item->Frame()->GetParent());
+      if (!menuFrame || menuFrame->GetMenuParent() != expectedParent) {
+        break;
+      }
+    }
+  }
+
+  nsIFrame* itemFrame;
+  if (item)
+    itemFrame = item->Frame();
+  else if (mActiveMenuBar)
+    itemFrame = mActiveMenuBar;
+  else
+    return false;
+
+  nsNavigationDirection theDirection;
+  NS_ASSERTION(aKeyCode >= nsIDOMKeyEvent::DOM_VK_END &&
+                 aKeyCode <= nsIDOMKeyEvent::DOM_VK_DOWN, "Illegal key code");
+  theDirection = NS_DIRECTION_FROM_KEY_CODE(itemFrame, aKeyCode);
+
+  // if a popup is open, first check for navigation within the popup
+  if (item && HandleKeyboardNavigationInPopup(item, theDirection))
+    return true;
+
+  // no popup handled the key, so check the active menubar, if any
+  if (mActiveMenuBar) {
+    nsMenuFrame* currentMenu = mActiveMenuBar->GetCurrentMenuItem();
+  
+    if (NS_DIRECTION_IS_INLINE(theDirection)) {
+      nsMenuFrame* nextItem = (theDirection == eNavigationDirection_End) ?
+                              GetNextMenuItem(mActiveMenuBar, currentMenu, false) : 
+                              GetPreviousMenuItem(mActiveMenuBar, currentMenu, false);
+      mActiveMenuBar->ChangeMenuItem(nextItem, true, true);
+      return true;
+    }
+    else if (NS_DIRECTION_IS_BLOCK(theDirection)) {
+      // Open the menu and select its first item.
+      if (currentMenu) {
+        nsCOMPtr<nsIContent> content = currentMenu->GetContent();
+        ShowMenu(content, true, false);
+      }
+      return true;
+    }
+  }
+
+  return false;
+}
+
+bool
+nsXULPopupManager::HandleKeyboardNavigationInPopup(nsMenuChainItem* item,
+                                                   nsMenuPopupFrame* aFrame,
+                                                   nsNavigationDirection aDir)
+{
+  NS_ASSERTION(aFrame, "aFrame is null");
+  NS_ASSERTION(!item || item->Frame() == aFrame,
+               "aFrame is expected to be equal to item->Frame()");
+
+  nsMenuFrame* currentMenu = aFrame->GetCurrentMenuItem();
+
+  aFrame->ClearIncrementalString();
+
+  // This method only gets called if we're open.
+  if (!currentMenu && NS_DIRECTION_IS_INLINE(aDir)) {
+    // We've been opened, but we haven't had anything selected.
+    // We can handle End, but our parent handles Start.
+    if (aDir == eNavigationDirection_End) {
+      nsMenuFrame* nextItem = GetNextMenuItem(aFrame, nullptr, true);
+      if (nextItem) {
+        aFrame->ChangeMenuItem(nextItem, false, true);
+        return true;
+      }
+    }
+    return false;
+  }
+
+  bool isContainer = false;
+  bool isOpen = false;
+  if (currentMenu) {
+    isOpen = currentMenu->IsOpen();
+    isContainer = currentMenu->IsMenu();
+    if (isOpen) {
+      // for an open popup, have the child process the event
+      nsMenuChainItem* child = item ? item->GetChild() : nullptr;
+      if (child && HandleKeyboardNavigationInPopup(child, aDir))
+        return true;
+    }
+    else if (aDir == eNavigationDirection_End &&
+             isContainer && !currentMenu->IsDisabled()) {
+      // The menu is not yet open. Open it and select the first item.
+      nsCOMPtr<nsIContent> content = currentMenu->GetContent();
+      ShowMenu(content, true, false);
+      return true;
+    }
+  }
+
+  // For block progression, we can move in either direction
+  if (NS_DIRECTION_IS_BLOCK(aDir) ||
+      NS_DIRECTION_IS_BLOCK_TO_EDGE(aDir)) {
+    nsMenuFrame* nextItem;
+
+    if (aDir == eNavigationDirection_Before)
+      nextItem = GetPreviousMenuItem(aFrame, currentMenu, true);
+    else if (aDir == eNavigationDirection_After)
+      nextItem = GetNextMenuItem(aFrame, currentMenu, true);
+    else if (aDir == eNavigationDirection_First)
+      nextItem = GetNextMenuItem(aFrame, nullptr, true);
+    else
+      nextItem = GetPreviousMenuItem(aFrame, nullptr, true);
+
+    if (nextItem) {
+      aFrame->ChangeMenuItem(nextItem, false, true);
+      return true;
+    }
+  }
+  else if (currentMenu && isContainer && isOpen) {
+    if (aDir == eNavigationDirection_Start) {
+      // close a submenu when Left is pressed
+      nsMenuPopupFrame* popupFrame = currentMenu->GetPopup();
+      if (popupFrame)
+        HidePopup(popupFrame->GetContent(), false, false, false, false);
+      return true;
+    }
+  }
+
+  return false;
+}
+
+bool
+nsXULPopupManager::HandleKeyboardEventWithKeyCode(
+                        nsIDOMKeyEvent* aKeyEvent,
+                        nsMenuChainItem* aTopVisibleMenuItem)
+{
+  uint32_t keyCode;
+  aKeyEvent->GetKeyCode(&keyCode);
+
+  // Escape should close panels, but the other keys should have no effect.
+  if (aTopVisibleMenuItem &&
+      aTopVisibleMenuItem->PopupType() != ePopupTypeMenu) {
+    if (keyCode == nsIDOMKeyEvent::DOM_VK_ESCAPE) {
+      HidePopup(aTopVisibleMenuItem->Content(), false, false, false, true);
+      aKeyEvent->AsEvent()->StopPropagation();
+      aKeyEvent->AsEvent()->StopCrossProcessForwarding();
+      aKeyEvent->AsEvent()->PreventDefault();
+    }
+    return true;
+  }
+
+  bool consume = (mPopups || mActiveMenuBar);
+  switch (keyCode) {
+    case nsIDOMKeyEvent::DOM_VK_UP:
+    case nsIDOMKeyEvent::DOM_VK_DOWN:
+#ifndef XP_MACOSX
+      // roll up the popup when alt+up/down are pressed within a menulist.
+      bool alt;
+      aKeyEvent->GetAltKey(&alt);
+      if (alt && aTopVisibleMenuItem && aTopVisibleMenuItem->Frame()->IsMenuList()) {
+        Rollup(0, false, nullptr, nullptr);
+        break;
+      }
+      MOZ_FALLTHROUGH;
+#endif
+
+    case nsIDOMKeyEvent::DOM_VK_LEFT:
+    case nsIDOMKeyEvent::DOM_VK_RIGHT:
+    case nsIDOMKeyEvent::DOM_VK_HOME:
+    case nsIDOMKeyEvent::DOM_VK_END:
+      HandleKeyboardNavigation(keyCode);
+      break;
+
+    case nsIDOMKeyEvent::DOM_VK_PAGE_DOWN:
+    case nsIDOMKeyEvent::DOM_VK_PAGE_UP:
+      if (aTopVisibleMenuItem) {
+        aTopVisibleMenuItem->Frame()->ChangeByPage(keyCode == nsIDOMKeyEvent::DOM_VK_PAGE_UP);
+      }
+      break;
+
+    case nsIDOMKeyEvent::DOM_VK_ESCAPE:
+      // Pressing Escape hides one level of menus only. If no menu is open,
+      // check if a menubar is active and inform it that a menu closed. Even
+      // though in this latter case, a menu didn't actually close, the effect
+      // ends up being the same. Similar for the tab key below.
+      if (aTopVisibleMenuItem) {
+        HidePopup(aTopVisibleMenuItem->Content(), false, false, false, true);
+      } else if (mActiveMenuBar) {
+        mActiveMenuBar->MenuClosed();
+      }
+      break;
+
+    case nsIDOMKeyEvent::DOM_VK_TAB:
+#ifndef XP_MACOSX
+    case nsIDOMKeyEvent::DOM_VK_F10:
+#endif
+      if (aTopVisibleMenuItem &&
+          !aTopVisibleMenuItem->Frame()->GetContent()->AttrValueIs(kNameSpaceID_None,
+           nsGkAtoms::activateontab, nsGkAtoms::_true, eCaseMatters)) {
+        // close popups or deactivate menubar when Tab or F10 are pressed
+        Rollup(0, false, nullptr, nullptr);
+        break;
+      } else if (mActiveMenuBar) {
+        mActiveMenuBar->MenuClosed();
+        break;
+      }
+      // Intentional fall-through to RETURN case
+      MOZ_FALLTHROUGH;
+
+    case nsIDOMKeyEvent::DOM_VK_RETURN: {
+      // If there is a popup open, check if the current item needs to be opened.
+      // Otherwise, tell the active menubar, if any, to activate the menu. The
+      // Enter method will return a menu if one needs to be opened as a result.
+      nsMenuFrame* menuToOpen = nullptr;
+      WidgetGUIEvent* GUIEvent = aKeyEvent->AsEvent()->
+        WidgetEventPtr()->AsGUIEvent();
+
+      if (aTopVisibleMenuItem) {
+        menuToOpen = aTopVisibleMenuItem->Frame()->Enter(GUIEvent);
+      } else if (mActiveMenuBar) {
+        menuToOpen = mActiveMenuBar->Enter(GUIEvent);
+      }
+      if (menuToOpen) {
+        nsCOMPtr<nsIContent> content = menuToOpen->GetContent();
+        ShowMenu(content, true, false);
+      }
+      break;
+    }
+
+    default:
+      return false;
+  }
+
+  if (consume) {
+    aKeyEvent->AsEvent()->StopPropagation();
+    aKeyEvent->AsEvent()->StopCrossProcessForwarding();
+    aKeyEvent->AsEvent()->PreventDefault();
+  }
+  return true;
+}
+
+nsMenuFrame*
+nsXULPopupManager::GetNextMenuItem(nsContainerFrame* aParent,
+                                   nsMenuFrame* aStart,
+                                   bool aIsPopup)
+{
+  nsPresContext* presContext = aParent->PresContext();
+  auto insertion = presContext->PresShell()->
+    FrameConstructor()->GetInsertionPoint(aParent->GetContent(), nullptr);
+  nsContainerFrame* immediateParent = insertion.mParentFrame;
+  if (!immediateParent)
+    immediateParent = aParent;
+
+  nsIFrame* currFrame = nullptr;
+  if (aStart) {
+    if (aStart->GetNextSibling())
+      currFrame = aStart->GetNextSibling();
+    else if (aStart->GetParent()->GetContent()->IsXULElement(nsGkAtoms::menugroup))
+      currFrame = aStart->GetParent()->GetNextSibling();
+  }
+  else
+    currFrame = immediateParent->PrincipalChildList().FirstChild();
+
+  while (currFrame) {
+    // See if it's a menu item.
+    nsIContent* currFrameContent = currFrame->GetContent();
+    if (IsValidMenuItem(currFrameContent, aIsPopup)) {
+      return do_QueryFrame(currFrame);
+    }
+    if (currFrameContent->IsXULElement(nsGkAtoms::menugroup) &&
+        currFrameContent->GetChildCount() > 0)
+      currFrame = currFrame->PrincipalChildList().FirstChild();
+    else if (!currFrame->GetNextSibling() &&
+             currFrame->GetParent()->GetContent()->IsXULElement(nsGkAtoms::menugroup))
+      currFrame = currFrame->GetParent()->GetNextSibling();
+    else
+      currFrame = currFrame->GetNextSibling();
+  }
+
+  currFrame = immediateParent->PrincipalChildList().FirstChild();
+
+  // Still don't have anything. Try cycling from the beginning.
+  while (currFrame && currFrame != aStart) {
+    // See if it's a menu item.
+    nsIContent* currFrameContent = currFrame->GetContent();
+    if (IsValidMenuItem(currFrameContent, aIsPopup)) {
+      return do_QueryFrame(currFrame);
+    }
+    if (currFrameContent->IsXULElement(nsGkAtoms::menugroup) &&
+        currFrameContent->GetChildCount() > 0)
+      currFrame = currFrame->PrincipalChildList().FirstChild();
+    else if (!currFrame->GetNextSibling() &&
+             currFrame->GetParent()->GetContent()->IsXULElement(nsGkAtoms::menugroup))
+      currFrame = currFrame->GetParent()->GetNextSibling();
+    else
+      currFrame = currFrame->GetNextSibling();
+  }
+
+  // No luck. Just return our start value.
+  return aStart;
+}
+
+nsMenuFrame*
+nsXULPopupManager::GetPreviousMenuItem(nsContainerFrame* aParent,
+                                       nsMenuFrame* aStart,
+                                       bool aIsPopup)
+{
+  nsPresContext* presContext = aParent->PresContext();
+  auto insertion = presContext->PresShell()->
+    FrameConstructor()->GetInsertionPoint(aParent->GetContent(), nullptr);
+  nsContainerFrame* immediateParent = insertion.mParentFrame;
+  if (!immediateParent)
+    immediateParent = aParent;
+
+  const nsFrameList& frames(immediateParent->PrincipalChildList());
+
+  nsIFrame* currFrame = nullptr;
+  if (aStart) {
+    if (aStart->GetPrevSibling())
+      currFrame = aStart->GetPrevSibling();
+    else if (aStart->GetParent()->GetContent()->IsXULElement(nsGkAtoms::menugroup))
+      currFrame = aStart->GetParent()->GetPrevSibling();
+  }
+  else
+    currFrame = frames.LastChild();
+
+  while (currFrame) {
+    // See if it's a menu item.
+    nsIContent* currFrameContent = currFrame->GetContent();
+    if (IsValidMenuItem(currFrameContent, aIsPopup)) {
+      return do_QueryFrame(currFrame);
+    }
+    if (currFrameContent->IsXULElement(nsGkAtoms::menugroup) &&
+        currFrameContent->GetChildCount() > 0) {
+      const nsFrameList& menugroupFrames(currFrame->PrincipalChildList());
+      currFrame = menugroupFrames.LastChild();
+    }
+    else if (!currFrame->GetPrevSibling() &&
+             currFrame->GetParent()->GetContent()->IsXULElement(nsGkAtoms::menugroup))
+      currFrame = currFrame->GetParent()->GetPrevSibling();
+    else
+      currFrame = currFrame->GetPrevSibling();
+  }
+
+  currFrame = frames.LastChild();
+
+  // Still don't have anything. Try cycling from the end.
+  while (currFrame && currFrame != aStart) {
+    // See if it's a menu item.
+    nsIContent* currFrameContent = currFrame->GetContent();
+    if (IsValidMenuItem(currFrameContent, aIsPopup)) {
+      return do_QueryFrame(currFrame);
+    }
+    if (currFrameContent->IsXULElement(nsGkAtoms::menugroup) &&
+        currFrameContent->GetChildCount() > 0) {
+      const nsFrameList& menugroupFrames(currFrame->PrincipalChildList());
+      currFrame = menugroupFrames.LastChild();
+    }
+    else if (!currFrame->GetPrevSibling() &&
+             currFrame->GetParent()->GetContent()->IsXULElement(nsGkAtoms::menugroup))
+      currFrame = currFrame->GetParent()->GetPrevSibling();
+    else
+      currFrame = currFrame->GetPrevSibling();
+  }
+
+  // No luck. Just return our start value.
+  return aStart;
+}
+
+bool
+nsXULPopupManager::IsValidMenuItem(nsIContent* aContent, bool aOnPopup)
+{
+  if (aContent->IsXULElement()) {
+    if (!aContent->IsAnyOfXULElements(nsGkAtoms::menu, nsGkAtoms::menuitem)) {
+      return false;
+    }
+  }
+  else if (!aOnPopup || !aContent->IsHTMLElement(nsGkAtoms::option)) {
+    return false;
+  }
+
+  nsMenuFrame* menuFrame = do_QueryFrame(aContent->GetPrimaryFrame());
+
+  bool skipNavigatingDisabledMenuItem = true;
+  if (aOnPopup && (!menuFrame || menuFrame->GetParentMenuListType() == eNotMenuList)) {
+    skipNavigatingDisabledMenuItem =
+      LookAndFeel::GetInt(LookAndFeel::eIntID_SkipNavigatingDisabledMenuItem,
+                          0) != 0;
+  }
+
+  return !(skipNavigatingDisabledMenuItem &&
+           aContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::disabled,
+                                 nsGkAtoms::_true, eCaseMatters));
+}
+
+nsresult
+nsXULPopupManager::HandleEvent(nsIDOMEvent* aEvent)
+{
+  nsCOMPtr<nsIDOMKeyEvent> keyEvent = do_QueryInterface(aEvent);
+  NS_ENSURE_TRUE(keyEvent, NS_ERROR_UNEXPECTED);
+
+  //handlers shouldn't be triggered by non-trusted events.
+  bool trustedEvent = false;
+  aEvent->GetIsTrusted(&trustedEvent);
+  if (!trustedEvent) {
+    return NS_OK;
+  }
+
+  nsAutoString eventType;
+  aEvent->GetType(eventType);
+  if (eventType.EqualsLiteral("keyup")) {
+    return KeyUp(keyEvent);
+  }
+  if (eventType.EqualsLiteral("keydown")) {
+    return KeyDown(keyEvent);
+  }
+  if (eventType.EqualsLiteral("keypress")) {
+    return KeyPress(keyEvent);
+  }
+
+  NS_ABORT();
+
+  return NS_OK;
+}
+
+nsresult
+nsXULPopupManager::KeyUp(nsIDOMKeyEvent* aKeyEvent)
+{
+  // don't do anything if a menu isn't open or a menubar isn't active
+  if (!mActiveMenuBar) {
+    nsMenuChainItem* item = GetTopVisibleMenu();
+    if (!item || item->PopupType() != ePopupTypeMenu)
+      return NS_OK;
+
+    if (item->IgnoreKeys() == eIgnoreKeys_Shortcuts) {
+      aKeyEvent->AsEvent()->StopCrossProcessForwarding();
+      return NS_OK;
+    }
+  }
+
+  aKeyEvent->AsEvent()->StopPropagation();
+  aKeyEvent->AsEvent()->StopCrossProcessForwarding();
+  aKeyEvent->AsEvent()->PreventDefault();
+
+  return NS_OK; // I am consuming event
+}
+
+nsresult
+nsXULPopupManager::KeyDown(nsIDOMKeyEvent* aKeyEvent)
+{
+  nsMenuChainItem* item = GetTopVisibleMenu();
+  if (item && item->Frame()->IsMenuLocked())
+    return NS_OK;
+
+  if (HandleKeyboardEventWithKeyCode(aKeyEvent, item)) {
+    return NS_OK;
+  }
+
+  // don't do anything if a menu isn't open or a menubar isn't active
+  if (!mActiveMenuBar && (!item || item->PopupType() != ePopupTypeMenu))
+    return NS_OK;
+
+  // Since a menu was open, stop propagation of the event to keep other event
+  // listeners from becoming confused.
+  if (!item || item->IgnoreKeys() != eIgnoreKeys_Shortcuts) {
+    aKeyEvent->AsEvent()->StopPropagation();
+  }
+
+  int32_t menuAccessKey = -1;
+
+  // If the key just pressed is the access key (usually Alt),
+  // dismiss and unfocus the menu.
+
+  nsMenuBarListener::GetMenuAccessKey(&menuAccessKey);
+  if (menuAccessKey) {
+    uint32_t theChar;
+    aKeyEvent->GetKeyCode(&theChar);
+
+    if (theChar == (uint32_t)menuAccessKey) {
+      bool ctrl = false;
+      if (menuAccessKey != nsIDOMKeyEvent::DOM_VK_CONTROL)
+        aKeyEvent->GetCtrlKey(&ctrl);
+      bool alt=false;
+      if (menuAccessKey != nsIDOMKeyEvent::DOM_VK_ALT)
+        aKeyEvent->GetAltKey(&alt);
+      bool shift=false;
+      if (menuAccessKey != nsIDOMKeyEvent::DOM_VK_SHIFT)
+        aKeyEvent->GetShiftKey(&shift);
+      bool meta=false;
+      if (menuAccessKey != nsIDOMKeyEvent::DOM_VK_META)
+        aKeyEvent->GetMetaKey(&meta);
+      if (!(ctrl || alt || shift || meta)) {
+        // The access key just went down and no other
+        // modifiers are already down.
+        nsMenuChainItem* item = GetTopVisibleMenu();
+        if (mPopups && item && !item->Frame()->IsMenuList()) {
+          Rollup(0, false, nullptr, nullptr);
+        } else if (mActiveMenuBar) {
+          mActiveMenuBar->MenuClosed();
+        }
+
+        // Clear the item to avoid bugs as it may have been deleted during rollup.
+        item = nullptr; 
+      }
+      aKeyEvent->AsEvent()->StopPropagation();
+      aKeyEvent->AsEvent()->PreventDefault();
+    }
+  }
+
+  aKeyEvent->AsEvent()->StopCrossProcessForwarding();
+  return NS_OK;
+}
+
+nsresult
+nsXULPopupManager::KeyPress(nsIDOMKeyEvent* aKeyEvent)
+{
+  // Don't check prevent default flag -- menus always get first shot at key events.
+
+  nsMenuChainItem* item = GetTopVisibleMenu();
+  if (item &&
+      (item->Frame()->IsMenuLocked() || item->PopupType() != ePopupTypeMenu)) {
+    return NS_OK;
+  }
+
+  nsCOMPtr<nsIDOMKeyEvent> keyEvent = do_QueryInterface(aKeyEvent);
+  NS_ENSURE_TRUE(keyEvent, NS_ERROR_UNEXPECTED);
+  // if a menu is open or a menubar is active, it consumes the key event
+  bool consume = (mPopups || mActiveMenuBar);
+
+  WidgetInputEvent* evt = aKeyEvent->AsEvent()->WidgetEventPtr()->AsInputEvent();
+  bool isAccel = evt && evt->IsAccel();
+
+  // When ignorekeys="shortcuts" is used, we don't call preventDefault on the
+  // key event when the accelerator key is pressed. This allows another
+  // listener to handle keys. For instance, this allows global shortcuts to
+  // still apply while a menu is open.
+  if (item && item->IgnoreKeys() == eIgnoreKeys_Shortcuts && isAccel) {
+    consume = false;
+  }
+
+  HandleShortcutNavigation(keyEvent, nullptr);
+
+  aKeyEvent->AsEvent()->StopCrossProcessForwarding();
+  if (consume) {
+    aKeyEvent->AsEvent()->StopPropagation();
+    aKeyEvent->AsEvent()->PreventDefault();
+  }
+
+  return NS_OK; // I am consuming event
+}
+
+NS_IMETHODIMP
+nsXULPopupShowingEvent::Run()
+{
+  nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
+  if (pm) {
+    pm->FirePopupShowingEvent(mPopup, mIsContextMenu, mSelectFirstItem);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsXULPopupHidingEvent::Run()
+{
+  nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
+
+  nsIDocument *document = mPopup->GetUncomposedDoc();
+  if (pm && document) {
+    nsIPresShell* presShell = document->GetShell();
+    if (presShell) {
+      nsPresContext* context = presShell->GetPresContext();
+      if (context) {
+        pm->FirePopupHidingEvent(mPopup, mNextPopup, mLastPopup,
+                                 context, mPopupType, mDeselectMenu, mIsRollup);
+      }
+    }
+  }
+
+  return NS_OK;
+}
+
+bool
+nsXULPopupPositionedEvent::DispatchIfNeeded(nsIContent *aPopup,
+                                            bool aIsContextMenu,
+                                            bool aSelectFirstItem)
+{
+  // The popuppositioned event only fires on arrow panels for now.
+  if (aPopup->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
+                          nsGkAtoms::arrow, eCaseMatters)) {
+    nsCOMPtr<nsIRunnable> event =
+      new nsXULPopupPositionedEvent(aPopup, aIsContextMenu, aSelectFirstItem);
+    NS_DispatchToCurrentThread(event);
+
+    return true;
+  }
+
+  return false;
+}
+
+NS_IMETHODIMP
+nsXULPopupPositionedEvent::Run()
+{
+  nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
+  if (pm) {
+    nsMenuPopupFrame* popupFrame = do_QueryFrame(mPopup->GetPrimaryFrame());
+    if (popupFrame) {
+      // At this point, hidePopup may have been called but it currently has no
+      // way to stop this event. However, if hidePopup was called, the popup
+      // will now be in the hiding or closed state. If we are in the shown or
+      // positioning state instead, we can assume that we are still clear to
+      // open/move the popup
+      nsPopupState state = popupFrame->PopupState();
+      if (state != ePopupPositioning && state != ePopupShown) {
+        return NS_OK;
+      }
+      nsEventStatus status = nsEventStatus_eIgnore;
+      WidgetMouseEvent event(true, eXULPopupPositioned, nullptr,
+                             WidgetMouseEvent::eReal);
+      EventDispatcher::Dispatch(mPopup, popupFrame->PresContext(),
+                                &event, nullptr, &status);
+
+      // Get the popup frame and make sure it is still in the positioning
+      // state. If it isn't, someone may have tried to reshow or hide it
+      // during the popuppositioned event.
+      // Alternately, this event may have been fired in reponse to moving the
+      // popup rather than opening it. In that case, we are done.
+      nsMenuPopupFrame* popupFrame = do_QueryFrame(mPopup->GetPrimaryFrame());
+      if (popupFrame && popupFrame->PopupState() == ePopupPositioning) {
+        pm->ShowPopupCallback(mPopup, popupFrame, mIsContextMenu, mSelectFirstItem);
+      }
+    }
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsXULMenuCommandEvent::Run()
+{
+  nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
+  if (!pm)
+    return NS_OK;
+
+  // The order of the nsViewManager and nsIPresShell COM pointers is
+  // important below.  We want the pres shell to get released before the
+  // associated view manager on exit from this function.
+  // See bug 54233.
+  // XXXndeakin is this still needed?
+
+  nsCOMPtr<nsIContent> popup;
+  nsMenuFrame* menuFrame = do_QueryFrame(mMenu->GetPrimaryFrame());
+  nsWeakFrame weakFrame(menuFrame);
+  if (menuFrame && mFlipChecked) {
+    if (menuFrame->IsChecked()) {
+      mMenu->UnsetAttr(kNameSpaceID_None, nsGkAtoms::checked, true);
+    } else {
+      mMenu->SetAttr(kNameSpaceID_None, nsGkAtoms::checked,
+                     NS_LITERAL_STRING("true"), true);
+    }
+  }
+
+  if (menuFrame && weakFrame.IsAlive()) {
+    // Find the popup that the menu is inside. Below, this popup will
+    // need to be hidden.
+    nsIFrame* frame = menuFrame->GetParent();
+    while (frame) {
+      nsMenuPopupFrame* popupFrame = do_QueryFrame(frame);
+      if (popupFrame) {
+        popup = popupFrame->GetContent();
+        break;
+      }
+      frame = frame->GetParent();
+    }
+
+    nsPresContext* presContext = menuFrame->PresContext();
+    nsCOMPtr<nsIPresShell> shell = presContext->PresShell();
+    RefPtr<nsViewManager> kungFuDeathGrip = shell->GetViewManager();
+    mozilla::Unused << kungFuDeathGrip; // Not referred to directly within this function
+
+    // Deselect ourselves.
+    if (mCloseMenuMode != CloseMenuMode_None)
+      menuFrame->SelectMenu(false);
+
+    AutoHandlingUserInputStatePusher userInpStatePusher(mUserInput, nullptr,
+                                                        shell->GetDocument());
+    nsContentUtils::DispatchXULCommand(mMenu, mIsTrusted, nullptr, shell,
+                                       mControl, mAlt, mShift, mMeta);
+  }
+
+  if (popup && mCloseMenuMode != CloseMenuMode_None)
+    pm->HidePopup(popup, mCloseMenuMode == CloseMenuMode_Auto, true, false, false);
+
+  return NS_OK;
+}