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;
if (combobox->IsCombobox() || combobox->IsAutoComplete()) {
RefPtr<AccEvent> event =
new AccStateChangeEvent(combobox, states::EXPANDED, true);
if (event) nsEventShell::FireEvent(event);
}
}
}
role
XULMenupopupAccessible::NativeRole() const
{
// If accessible is not bound to the tree (this happens while children are
// cached) return general role.
if (mParent) {
if (mParent->IsCombobox() || mParent->IsAutoComplete())
return roles::COMBOBOX_LIST;
if (mParent->Role() == roles::PUSHBUTTON) {
// Some widgets like the search bar have several popups, owned by buttons.
Accessible* grandParent = mParent->Parent();
if (grandParent && grandParent->IsAutoComplete())
return roles::COMBOBOX_LIST;
}
}
return roles::MENUPOPUP;
}
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);
}
}