The Tor Browser: accessible/src/generic/RootAccessible.cpp@141e0f1194b1 (annotated)

accessible/src/generic/RootAccessible.cpp@141e0f1194b1 (annotated)

accessible/src/generic/RootAccessible.cpp

Wed, 31 Dec 2014 07:16:47 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:16:47 +0100
branch: TOR_BUG_9701
changeset 3: 141e0f1194b1
permissions: -rw-r--r--

Revert simplistic fix pending revisit of Mozilla integration attempt.

 /* -*- 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 "RootAccessible.h"
 #include "mozilla/ArrayUtils.h"
 #define CreateEvent CreateEventA
 #include "nsIDOMDocument.h"
 #include "Accessible-inl.h"
 #include "DocAccessible-inl.h"
 #include "nsAccessibilityService.h"
 #include "nsAccUtils.h"
 #include "nsCoreUtils.h"
 #include "nsEventShell.h"
 #include "Relation.h"
 #include "Role.h"
 #include "States.h"
 #ifdef MOZ_XUL
 #include "XULTreeAccessible.h"
 #endif
 #include "mozilla/dom/Element.h"
 #include "nsIAccessibleRelation.h"
 #include "nsIDocShellTreeItem.h"
 #include "nsIDocShellTreeOwner.h"
 #include "mozilla/dom/Event.h"
 #include "mozilla/dom/EventTarget.h"
 #include "nsIDOMCustomEvent.h"
 #include "nsIDOMXULMultSelectCntrlEl.h"
 #include "nsIDocument.h"
 #include "nsIInterfaceRequestorUtils.h"
 #include "nsIPropertyBag2.h"
 #include "nsIServiceManager.h"
 #include "nsPIDOMWindow.h"
 #include "nsIWebBrowserChrome.h"
 #include "nsReadableUtils.h"
 #include "nsFocusManager.h"
 #ifdef MOZ_XUL
 #include "nsIXULDocument.h"
 #include "nsIXULWindow.h"
 #endif
 using namespace mozilla;
 using namespace mozilla::a11y;
 using namespace mozilla::dom;
 ////////////////////////////////////////////////////////////////////////////////
 // nsISupports
 NS_IMPL_ISUPPORTS_INHERITED(RootAccessible, DocAccessible, nsIAccessibleDocument)
 ////////////////////////////////////////////////////////////////////////////////
 // Constructor/destructor
 RootAccessible::
   RootAccessible(nsIDocument* aDocument, nsIContent* aRootContent,
                  nsIPresShell* aPresShell) :
   DocAccessibleWrap(aDocument, aRootContent, aPresShell)
 {
   mType = eRootType;
 }
 RootAccessible::~RootAccessible()
 {
 }
 ////////////////////////////////////////////////////////////////////////////////
 // Accessible
 ENameValueFlag
 RootAccessible::Name(nsString& aName)
 {
   aName.Truncate();
   if (mRoleMapEntry) {
     Accessible::Name(aName);
     if (!aName.IsEmpty())
       return eNameOK;
   }
   mDocumentNode->GetTitle(aName);
   return eNameOK;
 }
 role
 RootAccessible::NativeRole()
 {
   // If it's a <dialog> or <wizard>, use roles::DIALOG instead
   dom::Element* rootElm = mDocumentNode->GetRootElement();
   if (rootElm && (rootElm->Tag() == nsGkAtoms::dialog ||
                   rootElm->Tag() == nsGkAtoms::wizard))
     return roles::DIALOG;
   return DocAccessibleWrap::NativeRole();
 }
 // RootAccessible protected member
 #ifdef MOZ_XUL
 uint32_t
 RootAccessible::GetChromeFlags()
 {
   // Return the flag set for the top level window as defined
   // by nsIWebBrowserChrome::CHROME_WINDOW_[FLAGNAME]
   // Not simple: nsIXULWindow is not just a QI from nsIDOMWindow
   nsCOMPtr<nsIDocShell> docShell = nsCoreUtils::GetDocShellFor(mDocumentNode);
   NS_ENSURE_TRUE(docShell, 0);
   nsCOMPtr<nsIDocShellTreeOwner> treeOwner;
   docShell->GetTreeOwner(getter_AddRefs(treeOwner));
   NS_ENSURE_TRUE(treeOwner, 0);
   nsCOMPtr<nsIXULWindow> xulWin(do_GetInterface(treeOwner));
   if (!xulWin) {
     return 0;
   }
   uint32_t chromeFlags;
   xulWin->GetChromeFlags(&chromeFlags);
   return chromeFlags;
 }
 #endif
 uint64_t
 RootAccessible::NativeState()
 {
   uint64_t state = DocAccessibleWrap::NativeState();
   if (state & states::DEFUNCT)
     return state;
 #ifdef MOZ_XUL
   uint32_t chromeFlags = GetChromeFlags();
   if (chromeFlags & nsIWebBrowserChrome::CHROME_WINDOW_RESIZE)
     state |= states::SIZEABLE;
     // If it has a titlebar it's movable
     // XXX unless it's minimized or maximized, but not sure
     //     how to detect that
   if (chromeFlags & nsIWebBrowserChrome::CHROME_TITLEBAR)
     state |= states::MOVEABLE;
   if (chromeFlags & nsIWebBrowserChrome::CHROME_MODAL)
     state |= states::MODAL;
 #endif
   nsFocusManager* fm = nsFocusManager::GetFocusManager();
   if (fm && fm->GetActiveWindow() == mDocumentNode->GetWindow())
     state |= states::ACTIVE;
   return state;
 }
 const char* const kEventTypes[] = {
 #ifdef DEBUG_DRAGDROPSTART
   // Capture mouse over events and fire fake DRAGDROPSTART event to simplify
   // debugging a11y objects with event viewers.
   "mouseover",
 #endif
   // Fired when list or tree selection changes.
   "select",
   // Fired when value changes immediately, wether or not focused changed.
   "ValueChange",
   "AlertActive",
   "TreeRowCountChanged",
   "TreeInvalidated",
   // add ourself as a OpenStateChange listener (custom event fired in tree.xml)
   "OpenStateChange",
   // add ourself as a CheckboxStateChange listener (custom event fired in HTMLInputElement.cpp)
   "CheckboxStateChange",
   // add ourself as a RadioStateChange Listener ( custom event fired in in HTMLInputElement.cpp  & radio.xml)
   "RadioStateChange",
   "popupshown",
   "popuphiding",
   "DOMMenuInactive",
   "DOMMenuItemActive",
   "DOMMenuItemInactive",
   "DOMMenuBarActive",
   "DOMMenuBarInactive"
 };
 nsresult
 RootAccessible::AddEventListeners()
 {
   // EventTarget interface allows to register event listeners to
   // receive untrusted events (synthetic events generated by untrusted code).
   // For example, XBL bindings implementations for elements that are hosted in
   // non chrome document fire untrusted events.
   nsCOMPtr<EventTarget> nstarget = mDocumentNode;
   if (nstarget) {
     for (const char* const* e = kEventTypes,
                    * const* e_end = ArrayEnd(kEventTypes);
          e < e_end; ++e) {
       nsresult rv = nstarget->AddEventListener(NS_ConvertASCIItoUTF16(*e),
                                                this, true, true, 2);
       NS_ENSURE_SUCCESS(rv, rv);
     }
   }
   return DocAccessible::AddEventListeners();
 }
 nsresult
 RootAccessible::RemoveEventListeners()
 {
   nsCOMPtr<EventTarget> target = mDocumentNode;
   if (target) {
     for (const char* const* e = kEventTypes,
                    * const* e_end = ArrayEnd(kEventTypes);
          e < e_end; ++e) {
       nsresult rv = target->RemoveEventListener(NS_ConvertASCIItoUTF16(*e), this, true);
       NS_ENSURE_SUCCESS(rv, rv);
     }
   }
   // Do this before removing clearing caret accessible, so that it can use
   // shutdown the caret accessible's selection listener
   DocAccessible::RemoveEventListeners();
   return NS_OK;
 }
 ////////////////////////////////////////////////////////////////////////////////
 // public
 void
 RootAccessible::DocumentActivated(DocAccessible* aDocument)
 {
 }
 ////////////////////////////////////////////////////////////////////////////////
 // nsIDOMEventListener
 NS_IMETHODIMP
 RootAccessible::HandleEvent(nsIDOMEvent* aDOMEvent)
 {
   MOZ_ASSERT(aDOMEvent);
   Event* event = aDOMEvent->InternalDOMEvent();
   nsCOMPtr<nsINode> origTargetNode = do_QueryInterface(event->GetOriginalTarget());
   if (!origTargetNode)
     return NS_OK;
 #ifdef A11Y_LOG
   if (logging::IsEnabled(logging::eDOMEvents)) {
     nsAutoString eventType;
     aDOMEvent->GetType(eventType);
     logging::DOMEvent("handled", origTargetNode, eventType);
   }
 #endif
   DocAccessible* document =
     GetAccService()->GetDocAccessible(origTargetNode->OwnerDoc());
   if (document) {
     // Root accessible exists longer than any of its descendant documents so
     // that we are guaranteed notification is processed before root accessible
     // is destroyed.
     document->HandleNotification<RootAccessible, nsIDOMEvent>
       (this, &RootAccessible::ProcessDOMEvent, aDOMEvent);
   }
   return NS_OK;
 }
 // RootAccessible protected
 void
 RootAccessible::ProcessDOMEvent(nsIDOMEvent* aDOMEvent)
 {
   MOZ_ASSERT(aDOMEvent);
   Event* event = aDOMEvent->InternalDOMEvent();
   nsCOMPtr<nsINode> origTargetNode = do_QueryInterface(event->GetOriginalTarget());
   nsAutoString eventType;
   aDOMEvent->GetType(eventType);
 #ifdef A11Y_LOG
   if (logging::IsEnabled(logging::eDOMEvents))
     logging::DOMEvent("processed", origTargetNode, eventType);
 #endif
   if (eventType.EqualsLiteral("popuphiding")) {
     HandlePopupHidingEvent(origTargetNode);
     return;
   }
   DocAccessible* targetDocument = GetAccService()->
     GetDocAccessible(origTargetNode->OwnerDoc());
   NS_ASSERTION(targetDocument, "No document while accessible is in document?!");
   Accessible* accessible =
     targetDocument->GetAccessibleOrContainer(origTargetNode);
   if (!accessible)
     return;
 #ifdef MOZ_XUL
   XULTreeAccessible* treeAcc = accessible->AsXULTree();
   if (treeAcc) {
     if (eventType.EqualsLiteral("TreeRowCountChanged")) {
       HandleTreeRowCountChangedEvent(aDOMEvent, treeAcc);
       return;
     }
     if (eventType.EqualsLiteral("TreeInvalidated")) {
       HandleTreeInvalidatedEvent(aDOMEvent, treeAcc);
       return;
     }
   }
 #endif
   if (eventType.EqualsLiteral("RadioStateChange")) {
     uint64_t state = accessible->State();
     bool isEnabled = (state & (states::CHECKED | states::SELECTED)) != 0;
     if (accessible->NeedsDOMUIEvent()) {
       nsRefPtr<AccEvent> accEvent =
         new AccStateChangeEvent(accessible, states::CHECKED, isEnabled);
       nsEventShell::FireEvent(accEvent);
     }
     if (isEnabled) {
       FocusMgr()->ActiveItemChanged(accessible);
 #ifdef A11Y_LOG
       if (logging::IsEnabled(logging::eFocus))
         logging::ActiveItemChangeCausedBy("RadioStateChange", accessible);
 #endif
     }
     return;
   }
   if (eventType.EqualsLiteral("CheckboxStateChange")) {
     if (accessible->NeedsDOMUIEvent()) {
       uint64_t state = accessible->State();
       bool isEnabled = !!(state & states::CHECKED);
       nsRefPtr<AccEvent> accEvent =
         new AccStateChangeEvent(accessible, states::CHECKED, isEnabled);
       nsEventShell::FireEvent(accEvent);
     }
     return;
   }
   Accessible* treeItemAcc = nullptr;
 #ifdef MOZ_XUL
   // If it's a tree element, need the currently selected item.
   if (treeAcc) {
     treeItemAcc = accessible->CurrentItem();
     if (treeItemAcc)
       accessible = treeItemAcc;
   }
   if (treeItemAcc && eventType.EqualsLiteral("OpenStateChange")) {
     uint64_t state = accessible->State();
     bool isEnabled = (state & states::EXPANDED) != 0;
     nsRefPtr<AccEvent> accEvent =
       new AccStateChangeEvent(accessible, states::EXPANDED, isEnabled);
     nsEventShell::FireEvent(accEvent);
     return;
   }
   nsINode* targetNode = accessible->GetNode();
   if (treeItemAcc && eventType.EqualsLiteral("select")) {
     // XXX: We shouldn't be based on DOM select event which doesn't provide us
     // any context info. We should integrate into nsTreeSelection instead.
     // If multiselect tree, we should fire selectionadd or selection removed
     if (FocusMgr()->HasDOMFocus(targetNode)) {
       nsCOMPtr<nsIDOMXULMultiSelectControlElement> multiSel =
         do_QueryInterface(targetNode);
       nsAutoString selType;
       multiSel->GetSelType(selType);
       if (selType.IsEmpty() || !selType.EqualsLiteral("single")) {
         // XXX: We need to fire EVENT_SELECTION_ADD and EVENT_SELECTION_REMOVE
         // for each tree item. Perhaps each tree item will need to cache its
         // selection state and fire an event after a DOM "select" event when
         // that state changes. XULTreeAccessible::UpdateTreeSelection();
         nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_SELECTION_WITHIN,
                                 accessible);
         return;
       }
       nsRefPtr<AccSelChangeEvent> selChangeEvent =
         new AccSelChangeEvent(treeAcc, treeItemAcc,
                               AccSelChangeEvent::eSelectionAdd);
       nsEventShell::FireEvent(selChangeEvent);
       return;
     }
   }
   else
 #endif
   if (eventType.EqualsLiteral("AlertActive")) {
     nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_ALERT, accessible);
   }
   else if (eventType.EqualsLiteral("popupshown")) {
     HandlePopupShownEvent(accessible);
   }
   else if (eventType.EqualsLiteral("DOMMenuInactive")) {
     if (accessible->Role() == roles::MENUPOPUP) {
       nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_MENUPOPUP_END,
                               accessible);
     }
   }
   else if (eventType.EqualsLiteral("DOMMenuItemActive")) {
     FocusMgr()->ActiveItemChanged(accessible);
 #ifdef A11Y_LOG
     if (logging::IsEnabled(logging::eFocus))
       logging::ActiveItemChangeCausedBy("DOMMenuItemActive", accessible);
 #endif
   }
   else if (eventType.EqualsLiteral("DOMMenuItemInactive")) {
     // Process DOMMenuItemInactive event for autocomplete only because this is
     // unique widget that may acquire focus from autocomplete popup while popup
     // stays open and has no active item. In case of XUL tree autocomplete
     // popup this event is fired for tree accessible.
     Accessible* widget =
       accessible->IsWidget() ? accessible : accessible->ContainerWidget();
     if (widget && widget->IsAutoCompletePopup()) {
       FocusMgr()->ActiveItemChanged(nullptr);
 #ifdef A11Y_LOG
       if (logging::IsEnabled(logging::eFocus))
         logging::ActiveItemChangeCausedBy("DOMMenuItemInactive", accessible);
 #endif
     }
   }
   else if (eventType.EqualsLiteral("DOMMenuBarActive")) {  // Always from user input
     nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_MENU_START,
                             accessible, eFromUserInput);
     // Notify of active item change when menubar gets active and if it has
     // current item. This is a case of mouseover (set current menuitem) and
     // mouse click (activate the menubar). If menubar doesn't have current item
     // (can be a case of menubar activation from keyboard) then ignore this
     // notification because later we'll receive DOMMenuItemActive event after
     // current menuitem is set.
     Accessible* activeItem = accessible->CurrentItem();
     if (activeItem) {
       FocusMgr()->ActiveItemChanged(activeItem);
 #ifdef A11Y_LOG
       if (logging::IsEnabled(logging::eFocus))
         logging::ActiveItemChangeCausedBy("DOMMenuBarActive", accessible);
 #endif
     }
   }
   else if (eventType.EqualsLiteral("DOMMenuBarInactive")) {  // Always from user input
     nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_MENU_END,
                             accessible, eFromUserInput);
     FocusMgr()->ActiveItemChanged(nullptr);
 #ifdef A11Y_LOG
     if (logging::IsEnabled(logging::eFocus))
       logging::ActiveItemChangeCausedBy("DOMMenuBarInactive", accessible);
 #endif
   }
   else if (accessible->NeedsDOMUIEvent() &&
            eventType.EqualsLiteral("ValueChange")) {
      targetDocument->FireDelayedEvent(nsIAccessibleEvent::EVENT_VALUE_CHANGE,
                                       accessible);
   }
 #ifdef DEBUG_DRAGDROPSTART
   else if (eventType.EqualsLiteral("mouseover")) {
     nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_DRAGDROP_START,
                             accessible);
   }
 #endif
 }
 ////////////////////////////////////////////////////////////////////////////////
 // Accessible
 void
 RootAccessible::Shutdown()
 {
   // Called manually or by Accessible::LastRelease()
   if (!PresShell())
     return;  // Already shutdown
   DocAccessibleWrap::Shutdown();
 }
 // nsIAccessible method
 Relation
 RootAccessible::RelationByType(RelationType aType)
 {
   if (!mDocumentNode || aType != RelationType::EMBEDS)
     return DocAccessibleWrap::RelationByType(aType);
   nsIDOMWindow* rootWindow = mDocumentNode->GetWindow();
   if (rootWindow) {
     nsCOMPtr<nsIDOMWindow> contentWindow;
     rootWindow->GetContent(getter_AddRefs(contentWindow));
     if (contentWindow) {
       nsCOMPtr<nsIDOMDocument> contentDOMDocument;
       contentWindow->GetDocument(getter_AddRefs(contentDOMDocument));
       nsCOMPtr<nsIDocument> contentDocumentNode =
         do_QueryInterface(contentDOMDocument);
       if (contentDocumentNode) {
         DocAccessible* contentDocument =
           GetAccService()->GetDocAccessible(contentDocumentNode);
         if (contentDocument)
           return Relation(contentDocument);
       }
     }
   }
   return Relation();
 }
 ////////////////////////////////////////////////////////////////////////////////
 // Protected members
 void
 RootAccessible::HandlePopupShownEvent(Accessible* aAccessible)
 {
   roles::Role role = aAccessible->Role();
   if (role == roles::MENUPOPUP) {
     // Don't fire menupopup events for combobox and autocomplete lists.
     nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_MENUPOPUP_START,
                             aAccessible);
     return;
   }
   if (role == roles::TOOLTIP) {
     // There is a single <xul:tooltip> node which Mozilla moves around.
     // The accessible for it stays the same no matter where it moves.
     // AT's expect to get an EVENT_SHOW for the tooltip.
     // In event callback the tooltip's accessible will be ready.
     nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_SHOW, aAccessible);
     return;
   }
   if (role == roles::COMBOBOX_LIST) {
     // Fire expanded state change event for comboboxes and autocompeletes.
     Accessible* combobox = aAccessible->Parent();
     if (!combobox)
       return;
     roles::Role comboboxRole = combobox->Role();
     if (comboboxRole == roles::COMBOBOX ||
 	comboboxRole == roles::AUTOCOMPLETE) {
       nsRefPtr<AccEvent> event =
         new AccStateChangeEvent(combobox, states::EXPANDED, true);
       if (event)
         nsEventShell::FireEvent(event);
     }
   }
 }
 void
 RootAccessible::HandlePopupHidingEvent(nsINode* aPopupNode)
 {
   // Get popup accessible. There are cases when popup element isn't accessible
   // but an underlying widget is and behaves like popup, an example is
   // autocomplete popups.
   DocAccessible* document = nsAccUtils::GetDocAccessibleFor(aPopupNode);
   if (!document)
     return;
   Accessible* popup = document->GetAccessible(aPopupNode);
   if (!popup) {
     Accessible* popupContainer = document->GetContainerAccessible(aPopupNode);
     if (!popupContainer)
       return;
     uint32_t childCount = popupContainer->ChildCount();
     for (uint32_t idx = 0; idx < childCount; idx++) {
       Accessible* child = popupContainer->GetChildAt(idx);
       if (child->IsAutoCompletePopup()) {
         popup = child;
         break;
       }
     }
     // No popup no events. Focus is managed by DOM. This is a case for
     // menupopups of menus on Linux since there are no accessible for popups.
     if (!popup)
       return;
   }
   // In case of autocompletes and comboboxes fire state change event for
   // expanded state. Note, HTML form autocomplete isn't a subject of state
   // change event because they aren't autocompletes strictly speaking.
   // When popup closes (except nested popups and menus) then fire focus event to
   // where it was. The focus event is expected even if popup didn't take a focus.
   static const uint32_t kNotifyOfFocus = 1;
   static const uint32_t kNotifyOfState = 2;
   uint32_t notifyOf = 0;
   // HTML select is target of popuphidding event. Otherwise get container
   // widget. No container widget means this is either tooltip or menupopup.
   // No events in the former case.
   Accessible* widget = nullptr;
   if (popup->IsCombobox()) {
     widget = popup;
   } else {
     widget = popup->ContainerWidget();
     if (!widget) {
       if (!popup->IsMenuPopup())
         return;
       widget = popup;
     }
   }
   if (popup->IsAutoCompletePopup()) {
     // No focus event for autocomplete because it's managed by
     // DOMMenuItemInactive events.
     if (widget->IsAutoComplete())
       notifyOf = kNotifyOfState;
   } else if (widget->IsCombobox()) {
     // Fire focus for active combobox, otherwise the focus is managed by DOM
     // focus notifications. Always fire state change event.
     if (widget->IsActiveWidget())
       notifyOf = kNotifyOfFocus;
     notifyOf |= kNotifyOfState;
   } else if (widget->IsMenuButton()) {
     // Can be a part of autocomplete.
     Accessible* compositeWidget = widget->ContainerWidget();
     if (compositeWidget && compositeWidget->IsAutoComplete()) {
       widget = compositeWidget;
       notifyOf = kNotifyOfState;
     }
     // Autocomplete (like searchbar) can be inactive when popup hiddens
     notifyOf |= kNotifyOfFocus;
   } else if (widget == popup) {
     // Top level context menus and alerts.
     // Ignore submenus and menubar. When submenu is closed then sumbenu
     // container menuitem takes a focus via DOMMenuItemActive notification.
     // For menubars processing we listen DOMMenubarActive/Inactive
     // notifications.
     notifyOf = kNotifyOfFocus;
   }
   // Restore focus to where it was.
   if (notifyOf & kNotifyOfFocus) {
     FocusMgr()->ActiveItemChanged(nullptr);
 #ifdef A11Y_LOG
     if (logging::IsEnabled(logging::eFocus))
       logging::ActiveItemChangeCausedBy("popuphiding", popup);
 #endif
   }
   // Fire expanded state change event.
   if (notifyOf & kNotifyOfState) {
     nsRefPtr<AccEvent> event =
       new AccStateChangeEvent(widget, states::EXPANDED, false);
     document->FireDelayedEvent(event);
   }
 }
 #ifdef MOZ_XUL
 void
 RootAccessible::HandleTreeRowCountChangedEvent(nsIDOMEvent* aEvent,
                                                XULTreeAccessible* aAccessible)
 {
   nsCOMPtr<nsIDOMCustomEvent> customEvent(do_QueryInterface(aEvent));
   if (!customEvent)
     return;
   nsCOMPtr<nsIVariant> detailVariant;
   customEvent->GetDetail(getter_AddRefs(detailVariant));
   if (!detailVariant)
     return;
   nsCOMPtr<nsISupports> supports;
   detailVariant->GetAsISupports(getter_AddRefs(supports));
   nsCOMPtr<nsIPropertyBag2> propBag(do_QueryInterface(supports));
   if (!propBag)
     return;
   nsresult rv;
   int32_t index, count;
   rv = propBag->GetPropertyAsInt32(NS_LITERAL_STRING("index"), &index);
   if (NS_FAILED(rv))
     return;
   rv = propBag->GetPropertyAsInt32(NS_LITERAL_STRING("count"), &count);
   if (NS_FAILED(rv))
     return;
   aAccessible->InvalidateCache(index, count);
 }
 void
 RootAccessible::HandleTreeInvalidatedEvent(nsIDOMEvent* aEvent,
                                            XULTreeAccessible* aAccessible)
 {
   nsCOMPtr<nsIDOMCustomEvent> customEvent(do_QueryInterface(aEvent));
   if (!customEvent)
     return;
   nsCOMPtr<nsIVariant> detailVariant;
   customEvent->GetDetail(getter_AddRefs(detailVariant));
   if (!detailVariant)
     return;
   nsCOMPtr<nsISupports> supports;
   detailVariant->GetAsISupports(getter_AddRefs(supports));
   nsCOMPtr<nsIPropertyBag2> propBag(do_QueryInterface(supports));
   if (!propBag)
     return;
   int32_t startRow = 0, endRow = -1, startCol = 0, endCol = -1;
   propBag->GetPropertyAsInt32(NS_LITERAL_STRING("startrow"),
                               &startRow);
   propBag->GetPropertyAsInt32(NS_LITERAL_STRING("endrow"),
                               &endRow);
   propBag->GetPropertyAsInt32(NS_LITERAL_STRING("startcolumn"),
                               &startCol);
   propBag->GetPropertyAsInt32(NS_LITERAL_STRING("endcolumn"),
                               &endCol);
   aAccessible->TreeViewInvalidated(startRow, endRow, startCol, endCol);
 }
 #endif

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accessible/src/generic/RootAccessible.cpp@141e0f1194b1 (annotated)

accessible/src/generic/RootAccessible.cpp