The Tor Browser: accessible/src/base/nsAccessibilityService.cpp@b8a032363ba2 (annotated)

accessible/src/base/nsAccessibilityService.cpp@b8a032363ba2 (annotated)

accessible/src/base/nsAccessibilityService.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- 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 "nsAccessibilityService.h"
 // NOTE: alphabetically ordered
 #include "ApplicationAccessibleWrap.h"
 #include "ARIAGridAccessibleWrap.h"
 #include "ARIAMap.h"
 #include "DocAccessible-inl.h"
 #include "FocusManager.h"
 #include "HTMLCanvasAccessible.h"
 #include "HTMLElementAccessibles.h"
 #include "HTMLImageMapAccessible.h"
 #include "HTMLLinkAccessible.h"
 #include "HTMLListAccessible.h"
 #include "HTMLSelectAccessible.h"
 #include "HTMLTableAccessibleWrap.h"
 #include "HyperTextAccessibleWrap.h"
 #include "RootAccessible.h"
 #include "nsAccessiblePivot.h"
 #include "nsAccUtils.h"
 #include "nsAttrName.h"
 #include "nsEventShell.h"
 #include "nsIURI.h"
 #include "OuterDocAccessible.h"
 #include "Platform.h"
 #include "Role.h"
 #ifdef MOZ_ACCESSIBILITY_ATK
 #include "RootAccessibleWrap.h"
 #endif
 #include "States.h"
 #include "Statistics.h"
 #include "TextLeafAccessibleWrap.h"
 #ifdef MOZ_ACCESSIBILITY_ATK
 #include "AtkSocketAccessible.h"
 #endif
 #ifdef XP_WIN
 #include "mozilla/a11y/Compatibility.h"
 #include "HTMLWin32ObjectAccessible.h"
 #include "mozilla/StaticPtr.h"
 #endif
 #ifdef A11Y_LOG
 #include "Logging.h"
 #endif
 #ifdef MOZ_CRASHREPORTER
 #include "nsExceptionHandler.h"
 #endif
 #include "nsImageFrame.h"
 #include "nsIObserverService.h"
 #include "nsLayoutUtils.h"
 #include "nsObjectFrame.h"
 #include "nsSVGPathGeometryFrame.h"
 #include "nsTreeBodyFrame.h"
 #include "nsTreeColumns.h"
 #include "nsTreeUtils.h"
 #include "nsXBLPrototypeBinding.h"
 #include "nsXBLBinding.h"
 #include "mozilla/ArrayUtils.h"
 #include "mozilla/dom/DOMStringList.h"
 #include "mozilla/Preferences.h"
 #include "mozilla/Services.h"
 #include "nsDeckFrame.h"
 #ifdef MOZ_XUL
 #include "XULAlertAccessible.h"
 #include "XULColorPickerAccessible.h"
 #include "XULComboboxAccessible.h"
 #include "XULElementAccessibles.h"
 #include "XULFormControlAccessible.h"
 #include "XULListboxAccessibleWrap.h"
 #include "XULMenuAccessibleWrap.h"
 #include "XULSliderAccessible.h"
 #include "XULTabAccessible.h"
 #include "XULTreeGridAccessibleWrap.h"
 #endif
 #if defined(XP_WIN) || defined(MOZ_ACCESSIBILITY_ATK)
 #include "nsNPAPIPluginInstance.h"
 #endif
 using namespace mozilla;
 using namespace mozilla::a11y;
 using namespace mozilla::dom;
 ////////////////////////////////////////////////////////////////////////////////
 // Statics
 ////////////////////////////////////////////////////////////////////////////////
 /**
  * Return true if the element must be accessible.
  */
 static bool
 MustBeAccessible(nsIContent* aContent, DocAccessible* aDocument)
 {
   if (aContent->GetPrimaryFrame()->IsFocusable())
     return true;
   uint32_t attrCount = aContent->GetAttrCount();
   for (uint32_t attrIdx = 0; attrIdx < attrCount; attrIdx++) {
     const nsAttrName* attr = aContent->GetAttrNameAt(attrIdx);
     if (attr->NamespaceEquals(kNameSpaceID_None)) {
       nsIAtom* attrAtom = attr->Atom();
       nsDependentAtomString attrStr(attrAtom);
       if (!StringBeginsWith(attrStr, NS_LITERAL_STRING("aria-")))
         continue; // not ARIA
       // A global state or a property and in case of token defined.
       uint8_t attrFlags = aria::AttrCharacteristicsFor(attrAtom);
       if ((attrFlags & ATTR_GLOBAL) && (!(attrFlags & ATTR_VALTOKEN) ||
            nsAccUtils::HasDefinedARIAToken(aContent, attrAtom))) {
         return true;
       }
     }
   }
   // If the given ID is referred by relation attribute then create an accessible
   // for it.
   nsAutoString id;
   if (nsCoreUtils::GetID(aContent, id) && !id.IsEmpty())
     return aDocument->IsDependentID(id);
   return false;
 }
 ////////////////////////////////////////////////////////////////////////////////
 // nsAccessibilityService
 ////////////////////////////////////////////////////////////////////////////////
 nsAccessibilityService *nsAccessibilityService::gAccessibilityService = nullptr;
 ApplicationAccessible* nsAccessibilityService::gApplicationAccessible = nullptr;
 bool nsAccessibilityService::gIsShutdown = true;
 nsAccessibilityService::nsAccessibilityService() :
   DocManager(), FocusManager()
 {
 }
 nsAccessibilityService::~nsAccessibilityService()
 {
   NS_ASSERTION(gIsShutdown, "Accessibility wasn't shutdown!");
   gAccessibilityService = nullptr;
 }
 ////////////////////////////////////////////////////////////////////////////////
 // nsISupports
 NS_IMPL_ISUPPORTS_INHERITED(nsAccessibilityService,
                             DocManager,
                             nsIAccessibilityService,
                             nsIAccessibleRetrieval,
                             nsIObserver,
                             nsISelectionListener) // from SelectionManager
 ////////////////////////////////////////////////////////////////////////////////
 // nsIObserver
 NS_IMETHODIMP
 nsAccessibilityService::Observe(nsISupports *aSubject, const char *aTopic,
                          const char16_t *aData)
 {
   if (!nsCRT::strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID))
     Shutdown();
   return NS_OK;
 }
 // nsIAccessibilityService
 void
 nsAccessibilityService::NotifyOfAnchorJumpTo(nsIContent* aTargetNode)
 {
   nsIDocument* documentNode = aTargetNode->GetCurrentDoc();
   if (documentNode) {
     DocAccessible* document = GetDocAccessible(documentNode);
     if (document)
       document->SetAnchorJump(aTargetNode);
   }
 }
 // nsIAccessibilityService
 void
 nsAccessibilityService::FireAccessibleEvent(uint32_t aEvent,
                                             Accessible* aTarget)
 {
   nsEventShell::FireEvent(aEvent, aTarget);
 }
 ////////////////////////////////////////////////////////////////////////////////
 // nsIAccessibilityService
 Accessible*
 nsAccessibilityService::GetRootDocumentAccessible(nsIPresShell* aPresShell,
                                                   bool aCanCreate)
 {
   nsIPresShell* ps = aPresShell;
   nsIDocument* documentNode = aPresShell->GetDocument();
   if (documentNode) {
     nsCOMPtr<nsIDocShellTreeItem> treeItem(documentNode->GetDocShell());
     if (treeItem) {
       nsCOMPtr<nsIDocShellTreeItem> rootTreeItem;
       treeItem->GetRootTreeItem(getter_AddRefs(rootTreeItem));
       if (treeItem != rootTreeItem) {
         nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(rootTreeItem));
         ps = docShell->GetPresShell();
       }
       return aCanCreate ? GetDocAccessible(ps) : ps->GetDocAccessible();
     }
   }
   return nullptr;
 }
 #ifdef XP_WIN
 static StaticAutoPtr<nsTArray<nsCOMPtr<nsIContent> > > sPendingPlugins;
 static StaticAutoPtr<nsTArray<nsCOMPtr<nsITimer> > > sPluginTimers;
 class PluginTimerCallBack MOZ_FINAL : public nsITimerCallback
 {
 public:
   PluginTimerCallBack(nsIContent* aContent) : mContent(aContent) {}
   NS_DECL_ISUPPORTS
   NS_IMETHODIMP Notify(nsITimer* aTimer) MOZ_FINAL
   {
     if (!mContent->IsInDoc())
       return NS_OK;
     nsIPresShell* ps = mContent->OwnerDoc()->GetShell();
     if (ps) {
       DocAccessible* doc = ps->GetDocAccessible();
       if (doc) {
         // Make sure that if we created an accessible for the plugin that wasn't
         // a plugin accessible we remove it before creating the right accessible.
         doc->RecreateAccessible(mContent);
         sPluginTimers->RemoveElement(aTimer);
         return NS_OK;
       }
     }
     // We couldn't get a doc accessible so presumably the document went away.
     // In this case don't leak our ref to the content or timer.
     sPendingPlugins->RemoveElement(mContent);
     sPluginTimers->RemoveElement(aTimer);
     return NS_OK;
   }
 private:
   nsCOMPtr<nsIContent> mContent;
 };
 NS_IMPL_ISUPPORTS(PluginTimerCallBack, nsITimerCallback)
 #endif
 already_AddRefed<Accessible>
 nsAccessibilityService::CreatePluginAccessible(nsObjectFrame* aFrame,
                                                nsIContent* aContent,
                                                Accessible* aContext)
 {
   // nsObjectFrame means a plugin, so we need to use the accessibility support
   // of the plugin.
   if (aFrame->GetRect().IsEmpty())
     return nullptr;
 #if defined(XP_WIN) || defined(MOZ_ACCESSIBILITY_ATK)
   nsRefPtr<nsNPAPIPluginInstance> pluginInstance;
   if (NS_SUCCEEDED(aFrame->GetPluginInstance(getter_AddRefs(pluginInstance))) &&
       pluginInstance) {
 #ifdef XP_WIN
     if (!sPendingPlugins->Contains(aContent) &&
         (Preferences::GetBool("accessibility.delay_plugins") ||
          Compatibility::IsJAWS() || Compatibility::IsWE())) {
       nsCOMPtr<nsITimer> timer = do_CreateInstance(NS_TIMER_CONTRACTID);
       nsRefPtr<PluginTimerCallBack> cb = new PluginTimerCallBack(aContent);
       timer->InitWithCallback(cb, Preferences::GetUint("accessibility.delay_plugin_time"),
                               nsITimer::TYPE_ONE_SHOT);
       sPluginTimers->AppendElement(timer);
       sPendingPlugins->AppendElement(aContent);
       return nullptr;
     }
     // We need to remove aContent from the pending plugins here to avoid
     // reentrancy.  When the timer fires it calls
     // DocAccessible::ContentInserted() which does the work async.
     sPendingPlugins->RemoveElement(aContent);
     // Note: pluginPort will be null if windowless.
     HWND pluginPort = nullptr;
     aFrame->GetPluginPort(&pluginPort);
     nsRefPtr<Accessible> accessible =
       new HTMLWin32ObjectOwnerAccessible(aContent, aContext->Document(),
                                          pluginPort);
     return accessible.forget();
 #elif MOZ_ACCESSIBILITY_ATK
     if (!AtkSocketAccessible::gCanEmbed)
       return nullptr;
     // Note this calls into the plugin, so crazy things may happen and aFrame
     // may go away.
     nsCString plugId;
     nsresult rv = pluginInstance->GetValueFromPlugin(
       NPPVpluginNativeAccessibleAtkPlugId, &plugId);
     if (NS_SUCCEEDED(rv) && !plugId.IsEmpty()) {
       nsRefPtr<AtkSocketAccessible> socketAccessible =
         new AtkSocketAccessible(aContent, aContext->Document(), plugId);
       return socketAccessible.forget();
     }
 #endif
   }
 #endif
   return nullptr;
 }
 void
 nsAccessibilityService::DeckPanelSwitched(nsIPresShell* aPresShell,
                                           nsIContent* aDeckNode,
                                           nsIFrame* aPrevBoxFrame,
                                           nsIFrame* aCurrentBoxFrame)
 {
   // Ignore tabpanels elements (a deck having an accessible) since their
   // children are accessible not depending on selected tab.
   DocAccessible* document = GetDocAccessible(aPresShell);
   if (!document || document->HasAccessible(aDeckNode))
     return;
   if (aPrevBoxFrame) {
     nsIContent* panelNode = aPrevBoxFrame->GetContent();
 #ifdef A11Y_LOG
     if (logging::IsEnabled(logging::eTree)) {
       logging::MsgBegin("TREE", "deck panel unselected");
       logging::Node("container", panelNode);
       logging::Node("content", aDeckNode);
       logging::MsgEnd();
     }
 #endif
     document->ContentRemoved(aDeckNode, panelNode);
   }
   if (aCurrentBoxFrame) {
     nsIContent* panelNode = aCurrentBoxFrame->GetContent();
 #ifdef A11Y_LOG
     if (logging::IsEnabled(logging::eTree)) {
       logging::MsgBegin("TREE", "deck panel selected");
       logging::Node("container", panelNode);
       logging::Node("content", aDeckNode);
       logging::MsgEnd();
     }
 #endif
     document->ContentInserted(aDeckNode, panelNode, panelNode->GetNextSibling());
   }
 }
 void
 nsAccessibilityService::ContentRangeInserted(nsIPresShell* aPresShell,
                                              nsIContent* aContainer,
                                              nsIContent* aStartChild,
                                              nsIContent* aEndChild)
 {
 #ifdef A11Y_LOG
   if (logging::IsEnabled(logging::eTree)) {
     logging::MsgBegin("TREE", "content inserted");
     logging::Node("container", aContainer);
     for (nsIContent* child = aStartChild; child != aEndChild;
          child = child->GetNextSibling()) {
       logging::Node("content", child);
     }
     logging::MsgEnd();
     logging::Stack();
   }
 #endif
   DocAccessible* docAccessible = GetDocAccessible(aPresShell);
   if (docAccessible)
     docAccessible->ContentInserted(aContainer, aStartChild, aEndChild);
 }
 void
 nsAccessibilityService::ContentRemoved(nsIPresShell* aPresShell,
                                        nsIContent* aContainer,
                                        nsIContent* aChild)
 {
 #ifdef A11Y_LOG
   if (logging::IsEnabled(logging::eTree)) {
     logging::MsgBegin("TREE", "content removed");
     logging::Node("container", aContainer);
     logging::Node("content", aChild);
     logging::MsgEnd();
     logging::Stack();
   }
 #endif
   DocAccessible* docAccessible = GetDocAccessible(aPresShell);
   if (docAccessible)
     docAccessible->ContentRemoved(aContainer, aChild);
 }
 void
 nsAccessibilityService::UpdateText(nsIPresShell* aPresShell,
                                    nsIContent* aContent)
 {
   DocAccessible* document = GetDocAccessible(aPresShell);
   if (document)
     document->UpdateText(aContent);
 }
 void
 nsAccessibilityService::TreeViewChanged(nsIPresShell* aPresShell,
                                         nsIContent* aContent,
                                         nsITreeView* aView)
 {
   DocAccessible* document = GetDocAccessible(aPresShell);
   if (document) {
     Accessible* accessible = document->GetAccessible(aContent);
     if (accessible) {
       XULTreeAccessible* treeAcc = accessible->AsXULTree();
       if (treeAcc)
         treeAcc->TreeViewChanged(aView);
     }
   }
 }
 void
 nsAccessibilityService::RangeValueChanged(nsIPresShell* aPresShell,
                                           nsIContent* aContent)
 {
   DocAccessible* document = GetDocAccessible(aPresShell);
   if (document) {
     Accessible* accessible = document->GetAccessible(aContent);
     if (accessible) {
       document->FireDelayedEvent(nsIAccessibleEvent::EVENT_VALUE_CHANGE,
                                  accessible);
     }
   }
 }
 void
 nsAccessibilityService::UpdateListBullet(nsIPresShell* aPresShell,
                                          nsIContent* aHTMLListItemContent,
                                          bool aHasBullet)
 {
   DocAccessible* document = GetDocAccessible(aPresShell);
   if (document) {
     Accessible* accessible = document->GetAccessible(aHTMLListItemContent);
     if (accessible) {
       HTMLLIAccessible* listItem = accessible->AsHTMLListItem();
       if (listItem)
         listItem->UpdateBullet(aHasBullet);
     }
   }
 }
 void
 nsAccessibilityService::UpdateImageMap(nsImageFrame* aImageFrame)
 {
   nsIPresShell* presShell = aImageFrame->PresContext()->PresShell();
   DocAccessible* document = GetDocAccessible(presShell);
   if (document) {
     Accessible* accessible =
       document->GetAccessible(aImageFrame->GetContent());
     if (accessible) {
       HTMLImageMapAccessible* imageMap = accessible->AsImageMap();
       if (imageMap) {
         imageMap->UpdateChildAreas();
         return;
       }
       // If image map was initialized after we created an accessible (that'll
       // be an image accessible) then recreate it.
       RecreateAccessible(presShell, aImageFrame->GetContent());
     }
   }
 }
 void
 nsAccessibilityService::UpdateLabelValue(nsIPresShell* aPresShell,
                                          nsIContent* aLabelElm,
                                          const nsString& aNewValue)
 {
   DocAccessible* document = GetDocAccessible(aPresShell);
   if (document) {
     Accessible* accessible = document->GetAccessible(aLabelElm);
     if (accessible) {
       XULLabelAccessible* xulLabel = accessible->AsXULLabel();
       NS_ASSERTION(xulLabel,
                    "UpdateLabelValue was called for wrong accessible!");
       if (xulLabel)
         xulLabel->UpdateLabelValue(aNewValue);
     }
   }
 }
 void
 nsAccessibilityService::PresShellActivated(nsIPresShell* aPresShell)
 {
   DocAccessible* document = aPresShell->GetDocAccessible();
   if (document) {
     RootAccessible* rootDocument = document->RootAccessible();
     NS_ASSERTION(rootDocument, "Entirely broken tree: no root document!");
     if (rootDocument)
       rootDocument->DocumentActivated(document);
   }
 }
 void
 nsAccessibilityService::RecreateAccessible(nsIPresShell* aPresShell,
                                            nsIContent* aContent)
 {
   DocAccessible* document = GetDocAccessible(aPresShell);
   if (document)
     document->RecreateAccessible(aContent);
 }
 ////////////////////////////////////////////////////////////////////////////////
 // nsIAccessibleRetrieval
 NS_IMETHODIMP
 nsAccessibilityService::GetApplicationAccessible(nsIAccessible** aAccessibleApplication)
 {
   NS_ENSURE_ARG_POINTER(aAccessibleApplication);
   NS_IF_ADDREF(*aAccessibleApplication = ApplicationAcc());
   return NS_OK;
 }
 NS_IMETHODIMP
 nsAccessibilityService::GetAccessibleFor(nsIDOMNode *aNode,
                                          nsIAccessible **aAccessible)
 {
   NS_ENSURE_ARG_POINTER(aAccessible);
   *aAccessible = nullptr;
   if (!aNode)
     return NS_OK;
   nsCOMPtr<nsINode> node(do_QueryInterface(aNode));
   if (!node)
     return NS_ERROR_INVALID_ARG;
   DocAccessible* document = GetDocAccessible(node->OwnerDoc());
   if (document)
     NS_IF_ADDREF(*aAccessible = document->GetAccessible(node));
   return NS_OK;
 }
 NS_IMETHODIMP
 nsAccessibilityService::GetStringRole(uint32_t aRole, nsAString& aString)
 {
 #define ROLE(geckoRole, stringRole, atkRole, \
              macRole, msaaRole, ia2Role, nameRule) \
   case roles::geckoRole: \
     CopyUTF8toUTF16(stringRole, aString); \
     return NS_OK;
   switch (aRole) {
 #include "RoleMap.h"
     default:
       aString.AssignLiteral("unknown");
       return NS_OK;
   }
 #undef ROLE
 }
 NS_IMETHODIMP
 nsAccessibilityService::GetStringStates(uint32_t aState, uint32_t aExtraState,
                                         nsISupports **aStringStates)
 {
   nsRefPtr<DOMStringList> stringStates = new DOMStringList();
   uint64_t state = nsAccUtils::To64State(aState, aExtraState);
   // states
   if (state & states::UNAVAILABLE)
     stringStates->Add(NS_LITERAL_STRING("unavailable"));
   if (state & states::SELECTED)
     stringStates->Add(NS_LITERAL_STRING("selected"));
   if (state & states::FOCUSED)
     stringStates->Add(NS_LITERAL_STRING("focused"));
   if (state & states::PRESSED)
     stringStates->Add(NS_LITERAL_STRING("pressed"));
   if (state & states::CHECKED)
     stringStates->Add(NS_LITERAL_STRING("checked"));
   if (state & states::MIXED)
     stringStates->Add(NS_LITERAL_STRING("mixed"));
   if (state & states::READONLY)
     stringStates->Add(NS_LITERAL_STRING("readonly"));
   if (state & states::HOTTRACKED)
     stringStates->Add(NS_LITERAL_STRING("hottracked"));
   if (state & states::DEFAULT)
     stringStates->Add(NS_LITERAL_STRING("default"));
   if (state & states::EXPANDED)
     stringStates->Add(NS_LITERAL_STRING("expanded"));
   if (state & states::COLLAPSED)
     stringStates->Add(NS_LITERAL_STRING("collapsed"));
   if (state & states::BUSY)
     stringStates->Add(NS_LITERAL_STRING("busy"));
   if (state & states::FLOATING)
     stringStates->Add(NS_LITERAL_STRING("floating"));
   if (state & states::ANIMATED)
     stringStates->Add(NS_LITERAL_STRING("animated"));
   if (state & states::INVISIBLE)
     stringStates->Add(NS_LITERAL_STRING("invisible"));
   if (state & states::OFFSCREEN)
     stringStates->Add(NS_LITERAL_STRING("offscreen"));
   if (state & states::SIZEABLE)
     stringStates->Add(NS_LITERAL_STRING("sizeable"));
   if (state & states::MOVEABLE)
     stringStates->Add(NS_LITERAL_STRING("moveable"));
   if (state & states::SELFVOICING)
     stringStates->Add(NS_LITERAL_STRING("selfvoicing"));
   if (state & states::FOCUSABLE)
     stringStates->Add(NS_LITERAL_STRING("focusable"));
   if (state & states::SELECTABLE)
     stringStates->Add(NS_LITERAL_STRING("selectable"));
   if (state & states::LINKED)
     stringStates->Add(NS_LITERAL_STRING("linked"));
   if (state & states::TRAVERSED)
     stringStates->Add(NS_LITERAL_STRING("traversed"));
   if (state & states::MULTISELECTABLE)
     stringStates->Add(NS_LITERAL_STRING("multiselectable"));
   if (state & states::EXTSELECTABLE)
     stringStates->Add(NS_LITERAL_STRING("extselectable"));
   if (state & states::PROTECTED)
     stringStates->Add(NS_LITERAL_STRING("protected"));
   if (state & states::HASPOPUP)
     stringStates->Add(NS_LITERAL_STRING("haspopup"));
   if (state & states::REQUIRED)
     stringStates->Add(NS_LITERAL_STRING("required"));
   if (state & states::ALERT)
     stringStates->Add(NS_LITERAL_STRING("alert"));
   if (state & states::INVALID)
     stringStates->Add(NS_LITERAL_STRING("invalid"));
   if (state & states::CHECKABLE)
     stringStates->Add(NS_LITERAL_STRING("checkable"));
   // extraStates
   if (state & states::SUPPORTS_AUTOCOMPLETION)
     stringStates->Add(NS_LITERAL_STRING("autocompletion"));
   if (state & states::DEFUNCT)
     stringStates->Add(NS_LITERAL_STRING("defunct"));
   if (state & states::SELECTABLE_TEXT)
     stringStates->Add(NS_LITERAL_STRING("selectable text"));
   if (state & states::EDITABLE)
     stringStates->Add(NS_LITERAL_STRING("editable"));
   if (state & states::ACTIVE)
     stringStates->Add(NS_LITERAL_STRING("active"));
   if (state & states::MODAL)
     stringStates->Add(NS_LITERAL_STRING("modal"));
   if (state & states::MULTI_LINE)
     stringStates->Add(NS_LITERAL_STRING("multi line"));
   if (state & states::HORIZONTAL)
     stringStates->Add(NS_LITERAL_STRING("horizontal"));
   if (state & states::OPAQUE1)
     stringStates->Add(NS_LITERAL_STRING("opaque"));
   if (state & states::SINGLE_LINE)
     stringStates->Add(NS_LITERAL_STRING("single line"));
   if (state & states::TRANSIENT)
     stringStates->Add(NS_LITERAL_STRING("transient"));
   if (state & states::VERTICAL)
     stringStates->Add(NS_LITERAL_STRING("vertical"));
   if (state & states::STALE)
     stringStates->Add(NS_LITERAL_STRING("stale"));
   if (state & states::ENABLED)
     stringStates->Add(NS_LITERAL_STRING("enabled"));
   if (state & states::SENSITIVE)
     stringStates->Add(NS_LITERAL_STRING("sensitive"));
   if (state & states::EXPANDABLE)
     stringStates->Add(NS_LITERAL_STRING("expandable"));
   //unknown states
   if (!stringStates->Length())
     stringStates->Add(NS_LITERAL_STRING("unknown"));
   stringStates.forget(aStringStates);
   return NS_OK;
 }
 // nsIAccessibleRetrieval::getStringEventType()
 NS_IMETHODIMP
 nsAccessibilityService::GetStringEventType(uint32_t aEventType,
                                            nsAString& aString)
 {
   NS_ASSERTION(nsIAccessibleEvent::EVENT_LAST_ENTRY == ArrayLength(kEventTypeNames),
                "nsIAccessibleEvent constants are out of sync to kEventTypeNames");
   if (aEventType >= ArrayLength(kEventTypeNames)) {
     aString.AssignLiteral("unknown");
     return NS_OK;
   }
   CopyUTF8toUTF16(kEventTypeNames[aEventType], aString);
   return NS_OK;
 }
 // nsIAccessibleRetrieval::getStringRelationType()
 NS_IMETHODIMP
 nsAccessibilityService::GetStringRelationType(uint32_t aRelationType,
                                               nsAString& aString)
 {
   NS_ENSURE_ARG(aRelationType <= static_cast<uint32_t>(RelationType::LAST));
 #define RELATIONTYPE(geckoType, geckoTypeName, atkType, msaaType, ia2Type) \
   case RelationType::geckoType: \
     aString.AssignLiteral(geckoTypeName); \
     return NS_OK;
   RelationType relationType = static_cast<RelationType>(aRelationType);
   switch (relationType) {
 #include "RelationTypeMap.h"
     default:
       aString.AssignLiteral("unknown");
       return NS_OK;
   }
 #undef RELATIONTYPE
 }
 NS_IMETHODIMP
 nsAccessibilityService::GetAccessibleFromCache(nsIDOMNode* aNode,
                                                nsIAccessible** aAccessible)
 {
   NS_ENSURE_ARG_POINTER(aAccessible);
   *aAccessible = nullptr;
   if (!aNode)
     return NS_OK;
   nsCOMPtr<nsINode> node(do_QueryInterface(aNode));
   if (!node)
     return NS_ERROR_INVALID_ARG;
   // Search for an accessible in each of our per document accessible object
   // caches. If we don't find it, and the given node is itself a document, check
   // our cache of document accessibles (document cache). Note usually shutdown
   // document accessibles are not stored in the document cache, however an
   // "unofficially" shutdown document (i.e. not from DocManager) can still
   // exist in the document cache.
   Accessible* accessible = FindAccessibleInCache(node);
   if (!accessible) {
     nsCOMPtr<nsIDocument> document(do_QueryInterface(node));
     if (document)
       accessible = GetExistingDocAccessible(document);
   }
   NS_IF_ADDREF(*aAccessible = accessible);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsAccessibilityService::CreateAccessiblePivot(nsIAccessible* aRoot,
                                               nsIAccessiblePivot** aPivot)
 {
   NS_ENSURE_ARG_POINTER(aPivot);
   NS_ENSURE_ARG(aRoot);
   *aPivot = nullptr;
   nsRefPtr<Accessible> accessibleRoot(do_QueryObject(aRoot));
   NS_ENSURE_TRUE(accessibleRoot, NS_ERROR_INVALID_ARG);
   nsAccessiblePivot* pivot = new nsAccessiblePivot(accessibleRoot);
   NS_ADDREF(*aPivot = pivot);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsAccessibilityService::SetLogging(const nsACString& aModules)
 {
 #ifdef A11Y_LOG
   logging::Enable(PromiseFlatCString(aModules));
 #endif
   return NS_OK;
 }
 NS_IMETHODIMP
 nsAccessibilityService::IsLogged(const nsAString& aModule, bool* aIsLogged)
 {
   NS_ENSURE_ARG_POINTER(aIsLogged);
   *aIsLogged = false;
 #ifdef A11Y_LOG
   *aIsLogged = logging::IsEnabled(aModule);
 #endif
   return NS_OK;
 }
 ////////////////////////////////////////////////////////////////////////////////
 // nsAccessibilityService public
 Accessible*
 nsAccessibilityService::GetOrCreateAccessible(nsINode* aNode,
                                               Accessible* aContext,
                                               bool* aIsSubtreeHidden)
 {
   NS_PRECONDITION(aContext && aNode && !gIsShutdown,
                   "Maybe let'd do a crash? Oh, yes, baby!");
   if (aIsSubtreeHidden)
     *aIsSubtreeHidden = false;
   DocAccessible* document = aContext->Document();
   // Check to see if we already have an accessible for this node in the cache.
   // XXX: we don't have context check here. It doesn't really necessary until
   // we have in-law children adoption.
   Accessible* cachedAccessible = document->GetAccessible(aNode);
   if (cachedAccessible)
     return cachedAccessible;
   // No cache entry, so we must create the accessible.
   if (aNode->IsNodeOfType(nsINode::eDOCUMENT)) {
     // If it's document node then ask accessible document loader for
     // document accessible, otherwise return null.
     nsCOMPtr<nsIDocument> document(do_QueryInterface(aNode));
     return GetDocAccessible(document);
   }
   // We have a content node.
   if (!aNode->IsInDoc()) {
     NS_WARNING("Creating accessible for node with no document");
     return nullptr;
   }
   if (aNode->OwnerDoc() != document->DocumentNode()) {
     NS_ERROR("Creating accessible for wrong document");
     return nullptr;
   }
   if (!aNode->IsContent())
     return nullptr;
   nsIContent* content = aNode->AsContent();
   nsIFrame* frame = content->GetPrimaryFrame();
   // Check frame and its visibility. Note, hidden frame allows visible
   // elements in subtree.
   if (!frame || !frame->StyleVisibility()->IsVisible()) {
     if (aIsSubtreeHidden && !frame)
       *aIsSubtreeHidden = true;
     return nullptr;
   }
   if (frame->GetContent() != content) {
     // Not the main content for this frame. This happens because <area>
     // elements return the image frame as their primary frame. The main content
     // for the image frame is the image content. If the frame is not an image
     // frame or the node is not an area element then null is returned.
     // This setup will change when bug 135040 is fixed. Make sure we don't
     // create area accessible here. Hopefully assertion below will handle that.
 #ifdef DEBUG
   nsImageFrame* imageFrame = do_QueryFrame(frame);
   NS_ASSERTION(imageFrame && content->IsHTML() && content->Tag() == nsGkAtoms::area,
                "Unknown case of not main content for the frame!");
 #endif
     return nullptr;
   }
 #ifdef DEBUG
   nsImageFrame* imageFrame = do_QueryFrame(frame);
   NS_ASSERTION(!imageFrame || !content->IsHTML() || content->Tag() != nsGkAtoms::area,
                "Image map manages the area accessible creation!");
 #endif
   // Attempt to create an accessible based on what we know.
   nsRefPtr<Accessible> newAcc;
   // Create accessible for visible text frames.
   if (content->IsNodeOfType(nsINode::eTEXT)) {
     nsAutoString text;
     frame->GetRenderedText(&text, nullptr, nullptr, 0, UINT32_MAX);
     // Ignore not rendered text nodes and whitespace text nodes between table
     // cells.
     if (text.IsEmpty() ||
         (aContext->IsTableRow() && nsCoreUtils::IsWhitespaceString(text))) {
       if (aIsSubtreeHidden)
         *aIsSubtreeHidden = true;
       return nullptr;
     }
     newAcc = CreateAccessibleByFrameType(frame, content, aContext);
     if (!aContext->IsAcceptableChild(newAcc))
       return nullptr;
     document->BindToDocument(newAcc, nullptr);
     newAcc->AsTextLeaf()->SetText(text);
     return newAcc;
   }
   bool isHTML = content->IsHTML();
   if (isHTML && content->Tag() == nsGkAtoms::map) {
     // Create hyper text accessible for HTML map if it is used to group links
     // (see http://www.w3.org/TR/WCAG10-HTML-TECHS/#group-bypass). If the HTML
     // map rect is empty then it is used for links grouping. Otherwise it should
     // be used in conjunction with HTML image element and in this case we don't
     // create any accessible for it and don't walk into it. The accessibles for
     // HTML area (HTMLAreaAccessible) the map contains are attached as
     // children of the appropriate accessible for HTML image
     // (ImageAccessible).
     if (nsLayoutUtils::GetAllInFlowRectsUnion(frame,
                                               frame->GetParent()).IsEmpty()) {
       if (aIsSubtreeHidden)
         *aIsSubtreeHidden = true;
       return nullptr;
     }
     newAcc = new HyperTextAccessibleWrap(content, document);
     if (!aContext->IsAcceptableChild(newAcc))
       return nullptr;
     document->BindToDocument(newAcc, aria::GetRoleMap(aNode));
     return newAcc;
   }
   nsRoleMapEntry* roleMapEntry = aria::GetRoleMap(aNode);
   // If the element is focusable or global ARIA attribute is applied to it or
   // it is referenced by ARIA relationship then treat role="presentation" on
   // the element as the role is not there.
   if (roleMapEntry && roleMapEntry->Is(nsGkAtoms::presentation)) {
     if (!MustBeAccessible(content, document))
       return nullptr;
     roleMapEntry = nullptr;
   }
   if (!newAcc && isHTML) {  // HTML accessibles
     if (roleMapEntry) {
       // Create pure ARIA grid/treegrid related accessibles if they weren't used
       // on accessible HTML table elements.
       if ((roleMapEntry->accTypes & eTableCell)) {
         if (aContext->IsTableRow() &&
             (frame->AccessibleType() != eHTMLTableCellType ||
              aContext->GetContent() != content->GetParent())) {
           newAcc = new ARIAGridCellAccessibleWrap(content, document);
         }
       } else if ((roleMapEntry->IsOfType(eTable)) &&
                  frame->AccessibleType() != eHTMLTableType) {
         newAcc = new ARIAGridAccessibleWrap(content, document);
       }
     }
     if (!newAcc) {
       // Prefer to use markup (mostly tag name, perhaps attributes) to decide if
       // and what kind of accessible to create.
       newAcc = CreateHTMLAccessibleByMarkup(frame, content, aContext);
       // Try using frame to do it.
       if (!newAcc)
         newAcc = CreateAccessibleByFrameType(frame, content, aContext);
       // If table has strong ARIA role then all table descendants shouldn't
       // expose their native roles.
       if (!roleMapEntry && newAcc) {
         if (frame->AccessibleType() == eHTMLTableRowType) {
           nsRoleMapEntry* contextRoleMap = aContext->ARIARoleMap();
           if (contextRoleMap && !(contextRoleMap->IsOfType(eTable)))
             roleMapEntry = &aria::gEmptyRoleMap;
         } else if (frame->AccessibleType() == eHTMLTableCellType &&
                    aContext->ARIARoleMap() == &aria::gEmptyRoleMap) {
           roleMapEntry = &aria::gEmptyRoleMap;
         } else if (content->Tag() == nsGkAtoms::dt ||
                    content->Tag() == nsGkAtoms::li ||
                    content->Tag() == nsGkAtoms::dd ||
                    frame->AccessibleType() == eHTMLLiType) {
           nsRoleMapEntry* contextRoleMap = aContext->ARIARoleMap();
           if (contextRoleMap && !(contextRoleMap->IsOfType(eList)))
             roleMapEntry = &aria::gEmptyRoleMap;
         }
       }
     }
   }
   // Accessible XBL types and deck stuff are used in XUL only currently.
   if (!newAcc && content->IsXUL()) {
     // No accessible for not selected deck panel and its children.
     if (!aContext->IsXULTabpanels()) {
       nsDeckFrame* deckFrame = do_QueryFrame(frame->GetParent());
       if (deckFrame && deckFrame->GetSelectedBox() != frame) {
         if (aIsSubtreeHidden)
           *aIsSubtreeHidden = true;
         return nullptr;
       }
     }
     // XBL bindings may use @role attribute to point the accessible type
     // they belong to.
     newAcc = CreateAccessibleByType(content, document);
     // Any XUL box can be used as tabpanel, make sure we create a proper
     // accessible for it.
     if (!newAcc && aContext->IsXULTabpanels() &&
         content->GetParent() == aContext->GetContent()) {
       nsIAtom* frameType = frame->GetType();
       if (frameType == nsGkAtoms::boxFrame ||
           frameType == nsGkAtoms::scrollFrame) {
         newAcc = new XULTabpanelAccessible(content, document);
       }
     }
   }
   if (!newAcc) {
     if (content->IsSVG()) {
       nsSVGPathGeometryFrame* pathGeometryFrame = do_QueryFrame(frame);
       if (pathGeometryFrame) {
         // A graphic elements: rect, circle, ellipse, line, path, polygon,
         // polyline and image. A 'use' and 'text' graphic elements require
         // special support.
         newAcc = new EnumRoleAccessible(content, document, roles::GRAPHIC);
       } else if (content->Tag() == nsGkAtoms::svg) {
         newAcc = new EnumRoleAccessible(content, document, roles::DIAGRAM);
       }
     } else if (content->IsMathML()){
       if (content->Tag() == nsGkAtoms::math)
         newAcc = new EnumRoleAccessible(content, document, roles::EQUATION);
       else
         newAcc = new HyperTextAccessible(content, document);
     }
   }
   // If no accessible, see if we need to create a generic accessible because
   // of some property that makes this object interesting
   // We don't do this for <body>, <html>, <window>, <dialog> etc. which
   // correspond to the doc accessible and will be created in any case
   if (!newAcc && content->Tag() != nsGkAtoms::body && content->GetParent() &&
       (roleMapEntry || MustBeAccessible(content, document) ||
        (isHTML && nsCoreUtils::HasClickListener(content)))) {
     // This content is focusable or has an interesting dynamic content accessibility property.
     // If it's interesting we need it in the accessibility hierarchy so that events or
     // other accessibles can point to it, or so that it can hold a state, etc.
     if (isHTML) {
       // Interesting HTML container which may have selectable text and/or embedded objects
       newAcc = new HyperTextAccessibleWrap(content, document);
     } else {  // XUL, SVG, MathML etc.
       // Interesting generic non-HTML container
       newAcc = new AccessibleWrap(content, document);
     }
   }
   if (!newAcc || !aContext->IsAcceptableChild(newAcc))
     return nullptr;
   document->BindToDocument(newAcc, roleMapEntry);
   return newAcc;
 }
 ////////////////////////////////////////////////////////////////////////////////
 // nsAccessibilityService private
 bool
 nsAccessibilityService::Init()
 {
   // Initialize accessible document manager.
   if (!DocManager::Init())
     return false;
   // Add observers.
   nsCOMPtr<nsIObserverService> observerService =
     mozilla::services::GetObserverService();
   if (!observerService)
     return false;
   observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, false);
   static const char16_t kInitIndicator[] = { '1', 0 };
   observerService->NotifyObservers(nullptr, "a11y-init-or-shutdown", kInitIndicator);
 #ifdef A11Y_LOG
   logging::CheckEnv();
 #endif
   gApplicationAccessible = new ApplicationAccessibleWrap();
   NS_ADDREF(gApplicationAccessible); // will release in Shutdown()
 #ifdef MOZ_CRASHREPORTER
   CrashReporter::
     AnnotateCrashReport(NS_LITERAL_CSTRING("Accessibility"),
                         NS_LITERAL_CSTRING("Active"));
 #endif
 #ifdef XP_WIN
   sPendingPlugins = new nsTArray<nsCOMPtr<nsIContent> >;
   sPluginTimers = new nsTArray<nsCOMPtr<nsITimer> >;
 #endif
   gIsShutdown = false;
   // Now its safe to start platform accessibility.
   PlatformInit();
   return true;
 }
 void
 nsAccessibilityService::Shutdown()
 {
   // Remove observers.
   nsCOMPtr<nsIObserverService> observerService =
       mozilla::services::GetObserverService();
   if (observerService) {
     observerService->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
     static const char16_t kShutdownIndicator[] = { '0', 0 };
     observerService->NotifyObservers(nullptr, "a11y-init-or-shutdown", kShutdownIndicator);
   }
   // Stop accessible document loader.
   DocManager::Shutdown();
   SelectionManager::Shutdown();
 #ifdef XP_WIN
   sPendingPlugins = nullptr;
   uint32_t timerCount = sPluginTimers->Length();
   for (uint32_t i = 0; i < timerCount; i++)
     sPluginTimers->ElementAt(i)->Cancel();
   sPluginTimers = nullptr;
 #endif
   // Application is going to be closed, shutdown accessibility and mark
   // accessibility service as shutdown to prevent calls of its methods.
   // Don't null accessibility service static member at this point to be safe
   // if someone will try to operate with it.
   NS_ASSERTION(!gIsShutdown, "Accessibility was shutdown already");
   gIsShutdown = true;
   PlatformShutdown();
   gApplicationAccessible->Shutdown();
   NS_RELEASE(gApplicationAccessible);
   gApplicationAccessible = nullptr;
 }
 already_AddRefed<Accessible>
 nsAccessibilityService::CreateAccessibleByType(nsIContent* aContent,
                                                DocAccessible* aDoc)
 {
   nsAutoString role;
   for (const nsXBLBinding* binding = aContent->GetXBLBinding(); binding; binding = binding->GetBaseBinding()) {
     nsIContent* bindingElm = binding->PrototypeBinding()->GetBindingElement();
     bindingElm->GetAttr(kNameSpaceID_None, nsGkAtoms::role, role);
     if (!role.IsEmpty())
       break;
   }
   if (role.IsEmpty() || role.EqualsLiteral("none"))
     return nullptr;
   if (role.EqualsLiteral("outerdoc")) {
     nsRefPtr<Accessible> accessible = new OuterDocAccessible(aContent, aDoc);
     return accessible.forget();
   }
   nsRefPtr<Accessible> accessible;
 #ifdef MOZ_XUL
   // XUL controls
   if (role.EqualsLiteral("xul:alert")) {
     accessible = new XULAlertAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:button")) {
     accessible = new XULButtonAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:checkbox")) {
     accessible = new XULCheckboxAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:colorpicker")) {
     accessible = new XULColorPickerAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:colorpickertile")) {
     accessible = new XULColorPickerTileAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:combobox")) {
     accessible = new XULComboboxAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:tabpanels")) {
       accessible = new XULTabpanelsAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:dropmarker")) {
       accessible = new XULDropmarkerAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:groupbox")) {
       accessible = new XULGroupboxAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:image")) {
     if (aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::onclick)) {
       accessible = new XULToolbarButtonAccessible(aContent, aDoc);
     } else {
       // Don't include nameless images in accessible tree.
       if (!aContent->HasAttr(kNameSpaceID_None,
                              nsGkAtoms::tooltiptext))
         return nullptr;
       accessible = new ImageAccessibleWrap(aContent, aDoc);
     }
   } else if (role.EqualsLiteral("xul:link")) {
     accessible = new XULLinkAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:listbox")) {
       accessible = new XULListboxAccessibleWrap(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:listcell")) {
     // Only create cells if there's more than one per row.
     nsIContent* listItem = aContent->GetParent();
     if (!listItem)
       return nullptr;
     for (nsIContent* child = listItem->GetFirstChild(); child;
          child = child->GetNextSibling()) {
       if (child->IsXUL(nsGkAtoms::listcell) && child != aContent) {
         accessible = new XULListCellAccessibleWrap(aContent, aDoc);
         break;
       }
     }
   } else if (role.EqualsLiteral("xul:listhead")) {
     accessible = new XULColumAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:listheader")) {
     accessible = new XULColumnItemAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:listitem")) {
     accessible = new XULListitemAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:menubar")) {
     accessible = new XULMenubarAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:menulist")) {
     accessible = new XULComboboxAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:menuitem")) {
     accessible = new XULMenuitemAccessibleWrap(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:menupopup")) {
 #ifdef MOZ_ACCESSIBILITY_ATK
     // ATK considers this node to be redundant when within menubars, and it makes menu
     // navigation with assistive technologies more difficult
     // XXX In the future we will should this for consistency across the nsIAccessible
     // implementations on each platform for a consistent scripting environment, but
     // then strip out redundant accessibles in the AccessibleWrap class for each platform.
     nsIContent *parent = aContent->GetParent();
     if (parent && parent->IsXUL() && parent->Tag() == nsGkAtoms::menu)
       return nullptr;
 #endif
     accessible = new XULMenupopupAccessible(aContent, aDoc);
   } else if(role.EqualsLiteral("xul:menuseparator")) {
     accessible = new XULMenuSeparatorAccessible(aContent, aDoc);
   } else if(role.EqualsLiteral("xul:pane")) {
     accessible = new EnumRoleAccessible(aContent, aDoc, roles::PANE);
   } else if (role.EqualsLiteral("xul:panel")) {
     if (aContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::noautofocus,
                               nsGkAtoms::_true, eCaseMatters))
       accessible = new XULAlertAccessible(aContent, aDoc);
     else
       accessible = new EnumRoleAccessible(aContent, aDoc, roles::PANE);
   } else if (role.EqualsLiteral("xul:progressmeter")) {
     accessible = new XULProgressMeterAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xulstatusbar")) {
     accessible = new XULStatusBarAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:scale")) {
     accessible = new XULSliderAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:radiobutton")) {
     accessible = new XULRadioButtonAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:radiogroup")) {
     accessible = new XULRadioGroupAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:tab")) {
     accessible = new XULTabAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:tabs")) {
     accessible = new XULTabsAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:text")) {
     accessible = new XULLabelAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:textbox")) {
     accessible = new EnumRoleAccessible(aContent, aDoc, roles::SECTION);
   } else if (role.EqualsLiteral("xul:thumb")) {
     accessible = new XULThumbAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:tree")) {
     accessible = CreateAccessibleForXULTree(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:treecolumns")) {
     accessible = new XULTreeColumAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:treecolumnitem")) {
     accessible = new XULColumnItemAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:toolbar")) {
     accessible = new XULToolbarAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:toolbarseparator")) {
     accessible = new XULToolbarSeparatorAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:tooltip")) {
     accessible = new XULTooltipAccessible(aContent, aDoc);
   } else if (role.EqualsLiteral("xul:toolbarbutton")) {
     accessible = new XULToolbarButtonAccessible(aContent, aDoc);
   }
 #endif // MOZ_XUL
   return accessible.forget();
 }
 already_AddRefed<Accessible>
 nsAccessibilityService::CreateHTMLAccessibleByMarkup(nsIFrame* aFrame,
                                                      nsIContent* aContent,
                                                      Accessible* aContext)
 {
   DocAccessible* document = aContext->Document();
   if (aContext->IsTableRow()) {
     if (nsCoreUtils::IsHTMLTableHeader(aContent) &&
         aContext->GetContent() == aContent->GetParent()) {
       nsRefPtr<Accessible> accessible =
         new HTMLTableHeaderCellAccessibleWrap(aContent, document);
       return accessible.forget();
     }
     return nullptr;
   }
   // This method assumes we're in an HTML namespace.
   nsIAtom* tag = aContent->Tag();
   if (tag == nsGkAtoms::figcaption) {
     nsRefPtr<Accessible> accessible =
       new HTMLFigcaptionAccessible(aContent, document);
     return accessible.forget();
   }
   if (tag == nsGkAtoms::figure) {
     nsRefPtr<Accessible> accessible =
       new HTMLFigureAccessible(aContent, document);
     return accessible.forget();
   }
   if (tag == nsGkAtoms::legend) {
     nsRefPtr<Accessible> accessible =
       new HTMLLegendAccessible(aContent, document);
     return accessible.forget();
   }
   if (tag == nsGkAtoms::option) {
     nsRefPtr<Accessible> accessible =
       new HTMLSelectOptionAccessible(aContent, document);
     return accessible.forget();
   }
   if (tag == nsGkAtoms::optgroup) {
     nsRefPtr<Accessible> accessible =
       new HTMLSelectOptGroupAccessible(aContent, document);
     return accessible.forget();
   }
   if (tag == nsGkAtoms::ul || tag == nsGkAtoms::ol ||
       tag == nsGkAtoms::dl) {
     nsRefPtr<Accessible> accessible =
       new HTMLListAccessible(aContent, document);
     return accessible.forget();
   }
   if (tag == nsGkAtoms::a) {
     // Only some roles truly enjoy life as HTMLLinkAccessibles, for details
     // see closed bug 494807.
     nsRoleMapEntry* roleMapEntry = aria::GetRoleMap(aContent);
     if (roleMapEntry && roleMapEntry->role != roles::NOTHING &&
         roleMapEntry->role != roles::LINK) {
       nsRefPtr<Accessible> accessible =
         new HyperTextAccessibleWrap(aContent, document);
       return accessible.forget();
     }
     nsRefPtr<Accessible> accessible =
       new HTMLLinkAccessible(aContent, document);
     return accessible.forget();
   }
   if (aContext->IsList()) {
     // If list item is a child of accessible list then create an accessible for
     // it unconditionally by tag name. nsBlockFrame creates the list item
     // accessible for other elements styled as list items.
     if (aContext->GetContent() == aContent->GetParent()) {
       if (tag == nsGkAtoms::dt || tag == nsGkAtoms::li) {
         nsRefPtr<Accessible> accessible =
           new HTMLLIAccessible(aContent, document);
         return accessible.forget();
       }
       if (tag == nsGkAtoms::dd) {
         nsRefPtr<Accessible> accessible =
           new HyperTextAccessibleWrap(aContent, document);
         return accessible.forget();
       }
     }
     return nullptr;
   }
   if (tag == nsGkAtoms::abbr ||
       tag == nsGkAtoms::acronym ||
       tag == nsGkAtoms::article ||
       tag == nsGkAtoms::aside ||
       tag == nsGkAtoms::blockquote ||
       tag == nsGkAtoms::form ||
       tag == nsGkAtoms::footer ||
       tag == nsGkAtoms::header ||
       tag == nsGkAtoms::h1 ||
       tag == nsGkAtoms::h2 ||
       tag == nsGkAtoms::h3 ||
       tag == nsGkAtoms::h4 ||
       tag == nsGkAtoms::h5 ||
       tag == nsGkAtoms::h6 ||
       tag == nsGkAtoms::nav ||
       tag == nsGkAtoms::q ||
       tag == nsGkAtoms::section) {
     nsRefPtr<Accessible> accessible =
       new HyperTextAccessibleWrap(aContent, document);
     return accessible.forget();
   }
   if (tag == nsGkAtoms::label) {
     nsRefPtr<Accessible> accessible =
       new HTMLLabelAccessible(aContent, document);
     return accessible.forget();
   }
   if (tag == nsGkAtoms::output) {
     nsRefPtr<Accessible> accessible =
       new HTMLOutputAccessible(aContent, document);
     return accessible.forget();
   }
   if (tag == nsGkAtoms::progress) {
     nsRefPtr<Accessible> accessible =
       new HTMLProgressMeterAccessible(aContent, document);
     return accessible.forget();
   }
   return nullptr;
  }
 already_AddRefed<Accessible>
 nsAccessibilityService::CreateAccessibleByFrameType(nsIFrame* aFrame,
                                                     nsIContent* aContent,
                                                     Accessible* aContext)
 {
   DocAccessible* document = aContext->Document();
   nsRefPtr<Accessible> newAcc;
   switch (aFrame->AccessibleType()) {
     case eNoType:
       return nullptr;
     case eHTMLBRType:
       newAcc = new HTMLBRAccessible(aContent, document);
       break;
     case eHTMLButtonType:
       newAcc = new HTMLButtonAccessible(aContent, document);
       break;
     case eHTMLCanvasType:
       newAcc = new HTMLCanvasAccessible(aContent, document);
       break;
     case eHTMLCaptionType:
       if (aContext->IsTable() &&
           aContext->GetContent() == aContent->GetParent()) {
         newAcc = new HTMLCaptionAccessible(aContent, document);
       }
       break;
     case eHTMLCheckboxType:
       newAcc = new HTMLCheckboxAccessible(aContent, document);
       break;
     case eHTMLComboboxType:
       newAcc = new HTMLComboboxAccessible(aContent, document);
       break;
     case eHTMLFileInputType:
       newAcc = new HTMLFileInputAccessible(aContent, document);
       break;
     case eHTMLGroupboxType:
       newAcc = new HTMLGroupboxAccessible(aContent, document);
       break;
     case eHTMLHRType:
       newAcc = new HTMLHRAccessible(aContent, document);
       break;
     case eHTMLImageMapType:
       newAcc = new HTMLImageMapAccessible(aContent, document);
       break;
     case eHTMLLiType:
       if (aContext->IsList() &&
           aContext->GetContent() == aContent->GetParent()) {
         newAcc = new HTMLLIAccessible(aContent, document);
       }
       break;
     case eHTMLSelectListType:
       newAcc = new HTMLSelectListAccessible(aContent, document);
       break;
     case eHTMLMediaType:
       newAcc = new EnumRoleAccessible(aContent, document, roles::GROUPING);
       break;
     case eHTMLRadioButtonType:
       newAcc = new HTMLRadioButtonAccessible(aContent, document);
       break;
     case eHTMLRangeType:
       newAcc = new HTMLRangeAccessible(aContent, document);
       break;
     case eHTMLSpinnerType:
       newAcc = new HTMLSpinnerAccessible(aContent, document);
       break;
     case eHTMLTableType:
       newAcc = new HTMLTableAccessibleWrap(aContent, document);
       break;
     case eHTMLTableCellType:
       // Accessible HTML table cell should be a child of accessible HTML table
       // or its row (CSS HTML tables are polite to the used markup at
       // certain degree).
       // Otherwise create a generic text accessible to avoid text jamming
       // when reading by AT.
       if (aContext->IsHTMLTableRow() || aContext->IsHTMLTable())
         newAcc = new HTMLTableCellAccessibleWrap(aContent, document);
       else
         newAcc = new HyperTextAccessibleWrap(aContent, document);
       break;
     case eHTMLTableRowType: {
       // Accessible HTML table row must be a child of tbody/tfoot/thead of
       // accessible HTML table or must be a child of accessible of HTML table.
       if (aContext->IsTable()) {
         nsIContent* parentContent = aContent->GetParent();
         nsIFrame* parentFrame = parentContent->GetPrimaryFrame();
         if (parentFrame->GetType() == nsGkAtoms::tableRowGroupFrame) {
           parentContent = parentContent->GetParent();
           parentFrame = parentContent->GetPrimaryFrame();
         }
         if (parentFrame->GetType() == nsGkAtoms::tableOuterFrame &&
             aContext->GetContent() == parentContent) {
           newAcc = new HTMLTableRowAccessible(aContent, document);
         }
       }
       break;
     }
     case eHTMLTextFieldType:
       newAcc = new HTMLTextFieldAccessible(aContent, document);
       break;
     case eHyperTextType:
       if (aContent->Tag() != nsGkAtoms::dt && aContent->Tag() != nsGkAtoms::dd)
         newAcc = new HyperTextAccessibleWrap(aContent, document);
       break;
     case eImageType:
       newAcc = new ImageAccessibleWrap(aContent, document);
       break;
     case eOuterDocType:
       newAcc = new OuterDocAccessible(aContent, document);
       break;
     case ePluginType: {
       nsObjectFrame* objectFrame = do_QueryFrame(aFrame);
       newAcc = CreatePluginAccessible(objectFrame, aContent, aContext);
       break;
     }
     case eTextLeafType:
       newAcc = new TextLeafAccessibleWrap(aContent, document);
       break;
     default:
       MOZ_ASSERT(false);
       break;
   }
   return newAcc.forget();
 }
 ////////////////////////////////////////////////////////////////////////////////
 // nsIAccessibilityService (DON'T put methods here)
 Accessible*
 nsAccessibilityService::AddNativeRootAccessible(void* aAtkAccessible)
 {
 #ifdef MOZ_ACCESSIBILITY_ATK
   ApplicationAccessible* applicationAcc = ApplicationAcc();
   if (!applicationAcc)
     return nullptr;
   GtkWindowAccessible* nativeWnd =
     new GtkWindowAccessible(static_cast<AtkObject*>(aAtkAccessible));
   if (applicationAcc->AppendChild(nativeWnd))
     return nativeWnd;
 #endif
   return nullptr;
 }
 void
 nsAccessibilityService::RemoveNativeRootAccessible(Accessible* aAccessible)
 {
 #ifdef MOZ_ACCESSIBILITY_ATK
   ApplicationAccessible* applicationAcc = ApplicationAcc();
   if (applicationAcc)
     applicationAcc->RemoveChild(aAccessible);
 #endif
 }
 ////////////////////////////////////////////////////////////////////////////////
 // NS_GetAccessibilityService
 ////////////////////////////////////////////////////////////////////////////////
 /**
  * Return accessibility service; creating one if necessary.
  */
 nsresult
 NS_GetAccessibilityService(nsIAccessibilityService** aResult)
 {
   NS_ENSURE_TRUE(aResult, NS_ERROR_NULL_POINTER);
   *aResult = nullptr;
   if (nsAccessibilityService::gAccessibilityService) {
     NS_ADDREF(*aResult = nsAccessibilityService::gAccessibilityService);
     return NS_OK;
   }
   nsRefPtr<nsAccessibilityService> service = new nsAccessibilityService();
   NS_ENSURE_TRUE(service, NS_ERROR_OUT_OF_MEMORY);
   if (!service->Init()) {
     service->Shutdown();
     return NS_ERROR_FAILURE;
   }
   statistics::A11yInitialized();
   nsAccessibilityService::gAccessibilityService = service;
   NS_ADDREF(*aResult = service);
   return NS_OK;
 }
 ////////////////////////////////////////////////////////////////////////////////
 // nsAccessibilityService private (DON'T put methods here)
 #ifdef MOZ_XUL
 already_AddRefed<Accessible>
 nsAccessibilityService::CreateAccessibleForXULTree(nsIContent* aContent,
                                                    DocAccessible* aDoc)
 {
   nsIContent* child = nsTreeUtils::GetDescendantChild(aContent,
                                                       nsGkAtoms::treechildren);
   if (!child)
     return nullptr;
   nsTreeBodyFrame* treeFrame = do_QueryFrame(child->GetPrimaryFrame());
   if (!treeFrame)
     return nullptr;
   nsRefPtr<nsTreeColumns> treeCols = treeFrame->Columns();
   int32_t count = 0;
   treeCols->GetCount(&count);
   // Outline of list accessible.
   if (count == 1) {
     nsRefPtr<Accessible> accessible =
       new XULTreeAccessible(aContent, aDoc, treeFrame);
     return accessible.forget();
   }
   // Table or tree table accessible.
   nsRefPtr<Accessible> accessible =
     new XULTreeGridAccessibleWrap(aContent, aDoc, treeFrame);
   return accessible.forget();
 }
 #endif
 ////////////////////////////////////////////////////////////////////////////////
 // Services
 ////////////////////////////////////////////////////////////////////////////////
 namespace mozilla {
 namespace a11y {
 FocusManager*
 FocusMgr()
 {
   return nsAccessibilityService::gAccessibilityService;
 }
 SelectionManager*
 SelectionMgr()
 {
   return nsAccessibilityService::gAccessibilityService;
 }
 ApplicationAccessible*
 ApplicationAcc()
 {
   return nsAccessibilityService::gApplicationAccessible;
 }
 EPlatformDisabledState
 PlatformDisabledState()
 {
   static int disabledState = 0xff;
   if (disabledState == 0xff) {
     disabledState = Preferences::GetInt("accessibility.force_disabled", 0);
     if (disabledState < ePlatformIsForceEnabled)
       disabledState = ePlatformIsForceEnabled;
     else if (disabledState > ePlatformIsDisabled)
       disabledState = ePlatformIsDisabled;
   }
   return (EPlatformDisabledState)disabledState;
 }
 }
 }

The Tor Browser / annotate

accessible/src/base/nsAccessibilityService.cpp@b8a032363ba2 (annotated)

accessible/src/base/nsAccessibilityService.cpp