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);
}
}
// RootAccessible protected
void
RootAccessible::ProcessDOMEvent(nsIDOMEvent* aDOMEvent)
{
MOZ_ASSERT(aDOMEvent);
nsDOMEvent* 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();
// radiogroup in prefWindow is exposed as a list,
// and panebutton is exposed as XULListitem in A11y.
// XULListitemAccessible::GetStateInternal uses STATE_SELECTED in this case,
// so we need to check states::SELECTED also.
bool isEnabled = (state & (states::CHECKED | states::SELECTED)) != 0;
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")) {
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 (eventType.EqualsLiteral("ValueChange")) {
//We don't process 'ValueChange' events for progress meters since we listen
//@value attribute change for them.
if (!accessible->IsProgress()) {
targetDocument->FireDelayedEvent(nsIAccessibleEvent::EVENT_VALUE_CHANGE,
accessible);
}
}
#ifdef DEBUG_DRAGDROPSTART
else if (eventType.EqualsLiteral("mouseover")) {
nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_DRAGDROP_START,
accessible);
}
#endif
}