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-rw-r--r--accessible/generic/RootAccessible.cpp709
1 files changed, 709 insertions, 0 deletions
diff --git a/accessible/generic/RootAccessible.cpp b/accessible/generic/RootAccessible.cpp
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+++ b/accessible/generic/RootAccessible.cpp
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+/* -*- 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"
+#include "mozilla/PresShell.h" // for nsAccUtils::GetDocAccessibleFor()
+#include "nsXULPopupManager.h"
+
+#define CreateEvent CreateEventA
+
+#include "LocalAccessible-inl.h"
+#include "DocAccessible-inl.h"
+#include "mozilla/a11y/DocAccessibleParent.h"
+#include "nsAccessibilityService.h"
+#include "nsAccUtils.h"
+#include "nsCoreUtils.h"
+#include "nsEventShell.h"
+#include "Relation.h"
+#include "Role.h"
+#include "States.h"
+#include "XULTreeAccessible.h"
+
+#include "mozilla/dom/BindingUtils.h"
+#include "mozilla/dom/CustomEvent.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/dom/BrowserHost.h"
+
+#include "nsIDocShellTreeOwner.h"
+#include "mozilla/dom/Event.h"
+#include "mozilla/dom/EventTarget.h"
+#include "nsIDOMXULMultSelectCntrlEl.h"
+#include "mozilla/dom/Document.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsIPropertyBag2.h"
+#include "nsPIDOMWindow.h"
+#include "nsIWebBrowserChrome.h"
+#include "nsReadableUtils.h"
+#include "nsFocusManager.h"
+#include "nsGlobalWindow.h"
+
+#include "nsIAppWindow.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+using namespace mozilla::dom;
+
+////////////////////////////////////////////////////////////////////////////////
+// nsISupports
+
+NS_IMPL_ISUPPORTS_INHERITED(RootAccessible, DocAccessible, nsIDOMEventListener)
+
+////////////////////////////////////////////////////////////////////////////////
+// Constructor/destructor
+
+RootAccessible::RootAccessible(Document* aDocument, PresShell* aPresShell)
+ : DocAccessibleWrap(aDocument, aPresShell) {
+ mType = eRootType;
+}
+
+RootAccessible::~RootAccessible() {}
+
+////////////////////////////////////////////////////////////////////////////////
+// LocalAccessible
+
+ENameValueFlag RootAccessible::Name(nsString& aName) const {
+ aName.Truncate();
+
+ if (ARIARoleMap()) {
+ LocalAccessible::Name(aName);
+ if (!aName.IsEmpty()) return eNameOK;
+ }
+
+ mDocumentNode->GetTitle(aName);
+ return eNameOK;
+}
+
+// RootAccessible protected member
+uint32_t RootAccessible::GetChromeFlags() const {
+ // Return the flag set for the top level window as defined
+ // by nsIWebBrowserChrome::CHROME_WINDOW_[FLAGNAME]
+ // Not simple: nsIAppWindow 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<nsIAppWindow> appWin(do_GetInterface(treeOwner));
+ if (!appWin) {
+ return 0;
+ }
+ uint32_t chromeFlags;
+ appWin->GetChromeFlags(&chromeFlags);
+ return chromeFlags;
+}
+
+uint64_t RootAccessible::NativeState() const {
+ uint64_t state = DocAccessibleWrap::NativeState();
+ if (state & states::DEFUNCT) return state;
+
+ 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;
+
+ 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.js)
+ "RadioStateChange", "popupshown", "popuphiding", "DOMMenuInactive",
+ "DOMMenuItemActive", "DOMMenuItemInactive", "DOMMenuBarActive",
+ "DOMMenuBarInactive", "scroll", "DOMTitleChanged"};
+
+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.
+ // We must use the window's parent target in order to receive events from
+ // iframes and shadow DOM; e.g. ValueChange events from a <select> in an
+ // iframe or shadow DOM. The root document itself doesn't receive these.
+ nsPIDOMWindowOuter* window = mDocumentNode->GetWindow();
+ nsCOMPtr<EventTarget> nstarget = window ? window->GetParentTarget() : nullptr;
+
+ 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);
+ NS_ENSURE_SUCCESS(rv, rv);
+ }
+ }
+
+ return DocAccessible::AddEventListeners();
+}
+
+nsresult RootAccessible::RemoveEventListeners() {
+ nsPIDOMWindowOuter* window = mDocumentNode->GetWindow();
+ nsCOMPtr<EventTarget> target = window ? window->GetParentTarget() : nullptr;
+ if (target) {
+ for (const char *const *e = kEventTypes, *const *e_end =
+ ArrayEnd(kEventTypes);
+ e < e_end; ++e) {
+ target->RemoveEventListener(NS_ConvertASCIItoUTF16(*e), this, true);
+ }
+ }
+
+ // 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(Event* aDOMEvent) {
+ MOZ_ASSERT(aDOMEvent);
+ if (IsDefunct()) {
+ // Even though we've been shut down, RemoveEventListeners might not have
+ // removed the event handlers on the window's parent target if GetWindow
+ // returned null, so we might still get events here in this case. We should
+ // just ignore these events.
+ return NS_OK;
+ }
+
+ nsCOMPtr<nsINode> origTargetNode =
+ do_QueryInterface(aDOMEvent->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) {
+ nsAutoString eventType;
+ aDOMEvent->GetType(eventType);
+ if (eventType.EqualsLiteral("scroll")) {
+ // We don't put this in the notification queue for 2 reasons:
+ // 1. We will flood the queue with repetitive events.
+ // 2. Since this doesn't necessarily touch layout, we are not
+ // guaranteed to have a WillRefresh tick any time soon.
+ document->HandleScroll(origTargetNode);
+ } else {
+ // Root accessible exists longer than any of its descendant documents so
+ // that we are guaranteed notification is processed before root accessible
+ // is destroyed.
+ // For shadow DOM, GetOriginalTarget on the Event returns null if we
+ // process the event async, so we must pass the target node as well.
+ document->HandleNotification<RootAccessible, Event, nsINode>(
+ this, &RootAccessible::ProcessDOMEvent, aDOMEvent, origTargetNode);
+ }
+ }
+
+ return NS_OK;
+}
+
+// RootAccessible protected
+void RootAccessible::ProcessDOMEvent(Event* aDOMEvent, nsINode* aTarget) {
+ MOZ_ASSERT(aDOMEvent);
+ MOZ_ASSERT(aTarget);
+
+ nsAutoString eventType;
+ aDOMEvent->GetType(eventType);
+
+#ifdef A11Y_LOG
+ if (logging::IsEnabled(logging::eDOMEvents)) {
+ logging::DOMEvent("processed", aTarget, eventType);
+ }
+#endif
+
+ if (eventType.EqualsLiteral("popuphiding")) {
+ HandlePopupHidingEvent(aTarget);
+ return;
+ }
+
+ DocAccessible* targetDocument =
+ GetAccService()->GetDocAccessible(aTarget->OwnerDoc());
+ if (!targetDocument) {
+ // Document has ceased to exist.
+ return;
+ }
+
+ if (eventType.EqualsLiteral("popupshown") &&
+ aTarget->IsAnyOfXULElements(nsGkAtoms::tooltip, nsGkAtoms::panel)) {
+ targetDocument->ContentInserted(aTarget->AsContent(),
+ aTarget->GetNextSibling());
+ return;
+ }
+
+ LocalAccessible* accessible =
+ targetDocument->GetAccessibleOrContainer(aTarget);
+ if (!accessible) return;
+
+ if (accessible->IsDoc() && eventType.EqualsLiteral("DOMTitleChanged")) {
+ targetDocument->FireDelayedEvent(nsIAccessibleEvent::EVENT_NAME_CHANGE,
+ accessible);
+ return;
+ }
+
+ XULTreeAccessible* treeAcc = accessible->AsXULTree();
+ if (treeAcc) {
+ if (eventType.EqualsLiteral("TreeRowCountChanged")) {
+ HandleTreeRowCountChangedEvent(aDOMEvent, treeAcc);
+ return;
+ }
+
+ if (eventType.EqualsLiteral("TreeInvalidated")) {
+ HandleTreeInvalidatedEvent(aDOMEvent, treeAcc);
+ return;
+ }
+ }
+
+ if (eventType.EqualsLiteral("RadioStateChange")) {
+ uint64_t state = accessible->State();
+ bool isEnabled = (state & (states::CHECKED | states::SELECTED)) != 0;
+
+ if (accessible->NeedsDOMUIEvent()) {
+ RefPtr<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);
+
+ RefPtr<AccEvent> accEvent =
+ new AccStateChangeEvent(accessible, states::CHECKED, isEnabled);
+ nsEventShell::FireEvent(accEvent);
+ }
+ return;
+ }
+
+ LocalAccessible* treeItemAcc = nullptr;
+ // 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;
+
+ RefPtr<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 =
+ targetNode->AsElement()->AsXULMultiSelectControl();
+ if (!multiSel) {
+ // This shouldn't be possible. All XUL trees should have
+ // nsIDOMXULMultiSelectControlElement, and the tree is focused, so it
+ // shouldn't be dying. Nevertheless, this sometimes happens in the wild
+ // (bug 1597043).
+ MOZ_ASSERT_UNREACHABLE(
+ "XUL tree doesn't have nsIDOMXULMultiSelectControlElement");
+ return;
+ }
+ 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;
+ }
+
+ RefPtr<AccSelChangeEvent> selChangeEvent = new AccSelChangeEvent(
+ treeAcc, treeItemAcc, AccSelChangeEvent::eSelectionAdd);
+ nsEventShell::FireEvent(selChangeEvent);
+ return;
+ }
+ } else 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);
+ }
+ if (auto* focus = FocusMgr()->FocusedLocalAccessible()) {
+ // Intentionally use the content tree, because Linux strips menupopups
+ // from the a11y tree so accessible might be an arbitrary ancestor.
+ if (focus->GetContent() &&
+ focus->GetContent()->IsShadowIncludingInclusiveDescendantOf(
+ aTarget)) {
+ // Move the focus to the topmost menu active content if any. The
+ // menu item in the parent menu will not fire a DOMMenuItemActive
+ // event if it's already active.
+ LocalAccessible* newActiveAccessible = nullptr;
+ if (auto* pm = nsXULPopupManager::GetInstance()) {
+ if (auto* content = pm->GetTopActiveMenuItemContent()) {
+ newActiveAccessible =
+ accessible->Document()->GetAccessible(content);
+ }
+ }
+ FocusMgr()->ActiveItemChanged(newActiveAccessible);
+#ifdef A11Y_LOG
+ if (logging::IsEnabled(logging::eFocus)) {
+ logging::ActiveItemChangeCausedBy("DOMMenuInactive",
+ newActiveAccessible);
+ }
+#endif
+ }
+ }
+ } else if (eventType.EqualsLiteral("DOMMenuItemActive")) {
+ RefPtr<AccEvent> event =
+ new AccStateChangeEvent(accessible, states::ACTIVE, true);
+ nsEventShell::FireEvent(event);
+ FocusMgr()->ActiveItemChanged(accessible);
+#ifdef A11Y_LOG
+ if (logging::IsEnabled(logging::eFocus)) {
+ logging::ActiveItemChangeCausedBy("DOMMenuItemActive", accessible);
+ }
+#endif
+ } else if (eventType.EqualsLiteral("DOMMenuItemInactive")) {
+ RefPtr<AccEvent> event =
+ new AccStateChangeEvent(accessible, states::ACTIVE, false);
+ nsEventShell::FireEvent(event);
+
+ // 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.
+ LocalAccessible* 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.
+ LocalAccessible* 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")) {
+ uint32_t event = accessible->HasNumericValue()
+ ? nsIAccessibleEvent::EVENT_VALUE_CHANGE
+ : nsIAccessibleEvent::EVENT_TEXT_VALUE_CHANGE;
+ targetDocument->FireDelayedEvent(event, accessible);
+ }
+#ifdef DEBUG_DRAGDROPSTART
+ else if (eventType.EqualsLiteral("mouseover")) {
+ nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_DRAGDROP_START,
+ accessible);
+ }
+#endif
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// LocalAccessible
+
+void RootAccessible::Shutdown() {
+ // Called manually or by LocalAccessible::LastRelease()
+ if (HasShutdown()) {
+ return;
+ }
+ DocAccessibleWrap::Shutdown();
+}
+
+Relation RootAccessible::RelationByType(RelationType aType) const {
+ if (!mDocumentNode || aType != RelationType::EMBEDS) {
+ return DocAccessibleWrap::RelationByType(aType);
+ }
+
+ if (RemoteAccessible* remoteDoc = GetPrimaryRemoteTopLevelContentDoc()) {
+ return Relation(remoteDoc);
+ }
+
+ if (nsIDocShell* docShell = mDocumentNode->GetDocShell()) {
+ nsCOMPtr<nsIDocShellTreeOwner> owner;
+ docShell->GetTreeOwner(getter_AddRefs(owner));
+ if (owner) {
+ nsCOMPtr<nsIDocShellTreeItem> contentShell;
+ owner->GetPrimaryContentShell(getter_AddRefs(contentShell));
+ if (contentShell) {
+ return Relation(nsAccUtils::GetDocAccessibleFor(contentShell));
+ }
+ }
+ }
+
+ return Relation();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Protected members
+
+void RootAccessible::HandlePopupShownEvent(LocalAccessible* 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::COMBOBOX_LIST) {
+ // Fire expanded state change event for comboboxes and autocompeletes.
+ LocalAccessible* combobox = aAccessible->LocalParent();
+ if (!combobox) return;
+
+ if (combobox->IsCombobox()) {
+ RefPtr<AccEvent> event =
+ new AccStateChangeEvent(combobox, states::EXPANDED, true);
+ nsEventShell::FireEvent(event);
+ }
+
+ // If aria-activedescendant is present, redirect focus.
+ // This is needed for parent process <select> dropdowns, which use a
+ // menulist containing div elements instead of XUL menuitems. XUL menuitems
+ // fire DOMMenuItemActive events from layout instead.
+ MOZ_ASSERT(aAccessible->Elm());
+ if (aAccessible->Elm()->HasAttr(nsGkAtoms::aria_activedescendant)) {
+ LocalAccessible* activeDescendant = aAccessible->CurrentItem();
+ if (activeDescendant) {
+ FocusMgr()->ActiveItemChanged(activeDescendant, false);
+#ifdef A11Y_LOG
+ if (logging::IsEnabled(logging::eFocus)) {
+ logging::ActiveItemChangeCausedBy("ARIA activedescendant on popup",
+ activeDescendant);
+ }
+#endif
+ }
+ }
+ }
+}
+
+void RootAccessible::HandlePopupHidingEvent(nsINode* aPopupNode) {
+ DocAccessible* document = nsAccUtils::GetDocAccessibleFor(aPopupNode);
+ if (!document) {
+ return;
+ }
+
+ if (aPopupNode->IsAnyOfXULElements(nsGkAtoms::tooltip, nsGkAtoms::panel)) {
+ document->ContentRemoved(aPopupNode->AsContent());
+ return;
+ }
+
+ // 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.
+ LocalAccessible* popup = document->GetAccessible(aPopupNode);
+ if (!popup) {
+ LocalAccessible* popupContainer =
+ document->GetContainerAccessible(aPopupNode);
+ if (!popupContainer) {
+ return;
+ }
+
+ uint32_t childCount = popupContainer->ChildCount();
+ for (uint32_t idx = 0; idx < childCount; idx++) {
+ LocalAccessible* child = popupContainer->LocalChildAt(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.
+
+ // 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.
+ LocalAccessible* widget = nullptr;
+ if (popup->IsCombobox()) {
+ widget = popup;
+ } else {
+ widget = popup->ContainerWidget();
+ if (!widget) {
+ if (!popup->IsMenuPopup()) {
+ return;
+ }
+ widget = popup;
+ }
+ }
+
+ // Fire expanded state change event.
+ if (widget->IsCombobox()) {
+ RefPtr<AccEvent> event =
+ new AccStateChangeEvent(widget, states::EXPANDED, false);
+ document->FireDelayedEvent(event);
+ }
+}
+
+static void GetPropertyBagFromEvent(Event* aEvent,
+ nsIPropertyBag2** aPropertyBag) {
+ *aPropertyBag = nullptr;
+
+ CustomEvent* customEvent = aEvent->AsCustomEvent();
+ if (!customEvent) return;
+
+ AutoJSAPI jsapi;
+ if (!jsapi.Init(customEvent->GetParentObject())) return;
+
+ JSContext* cx = jsapi.cx();
+ JS::Rooted<JS::Value> detail(cx);
+ customEvent->GetDetail(cx, &detail);
+ if (!detail.isObject()) return;
+
+ JS::Rooted<JSObject*> detailObj(cx, &detail.toObject());
+
+ nsresult rv;
+ nsCOMPtr<nsIPropertyBag2> propBag;
+ rv = UnwrapArg<nsIPropertyBag2>(cx, detailObj, getter_AddRefs(propBag));
+ if (NS_FAILED(rv)) return;
+
+ propBag.forget(aPropertyBag);
+}
+
+void RootAccessible::HandleTreeRowCountChangedEvent(
+ Event* aEvent, XULTreeAccessible* aAccessible) {
+ nsCOMPtr<nsIPropertyBag2> propBag;
+ GetPropertyBagFromEvent(aEvent, getter_AddRefs(propBag));
+ if (!propBag) return;
+
+ nsresult rv;
+ int32_t index, count;
+ rv = propBag->GetPropertyAsInt32(u"index"_ns, &index);
+ if (NS_FAILED(rv)) return;
+
+ rv = propBag->GetPropertyAsInt32(u"count"_ns, &count);
+ if (NS_FAILED(rv)) return;
+
+ aAccessible->InvalidateCache(index, count);
+}
+
+void RootAccessible::HandleTreeInvalidatedEvent(
+ Event* aEvent, XULTreeAccessible* aAccessible) {
+ nsCOMPtr<nsIPropertyBag2> propBag;
+ GetPropertyBagFromEvent(aEvent, getter_AddRefs(propBag));
+ if (!propBag) return;
+
+ int32_t startRow = 0, endRow = -1, startCol = 0, endCol = -1;
+ propBag->GetPropertyAsInt32(u"startrow"_ns, &startRow);
+ propBag->GetPropertyAsInt32(u"endrow"_ns, &endRow);
+ propBag->GetPropertyAsInt32(u"startcolumn"_ns, &startCol);
+ propBag->GetPropertyAsInt32(u"endcolumn"_ns, &endCol);
+
+ aAccessible->TreeViewInvalidated(startRow, endRow, startCol, endCol);
+}
+
+RemoteAccessible* RootAccessible::GetPrimaryRemoteTopLevelContentDoc() const {
+ nsCOMPtr<nsIDocShellTreeOwner> owner;
+ mDocumentNode->GetDocShell()->GetTreeOwner(getter_AddRefs(owner));
+ NS_ENSURE_TRUE(owner, nullptr);
+
+ nsCOMPtr<nsIRemoteTab> remoteTab;
+ owner->GetPrimaryRemoteTab(getter_AddRefs(remoteTab));
+ if (!remoteTab) {
+ return nullptr;
+ }
+
+ auto tab = static_cast<dom::BrowserHost*>(remoteTab.get());
+ return tab->GetTopLevelDocAccessible();
+}