void
SelectionManager::NormalSelectionChanged(nsISelection* aSelection)
{
mLastUsedSelection = do_GetWeakReference(aSelection);
int32_t rangeCount = 0;
aSelection->GetRangeCount(&rangeCount);
if (rangeCount == 0) {
mLastTextAccessible = nullptr;
return; // No selection
}
HyperTextAccessible* textAcc =
nsAccUtils::GetTextAccessibleFromSelection(aSelection);
if (!textAcc)
return;
int32_t caretOffset = -1;
nsresult rv = textAcc->GetCaretOffset(&caretOffset);
if (NS_FAILED(rv))
return;
if (textAcc == mLastTextAccessible && caretOffset == mLastCaretOffset) {
int32_t selectionCount = 0;
textAcc->GetSelectionCount(&selectionCount); // Don't swallow similar events when selecting text
if (!selectionCount)
return; // Swallow duplicate caret event
}
mLastCaretOffset = caretOffset;
mLastTextAccessible = textAcc;
nsRefPtr<AccEvent> event = new AccCaretMoveEvent(mLastTextAccessible);
mLastTextAccessible->Document()->FireDelayedEvent(event);
}
void
SelectionManager::ProcessTextSelChangeEvent(AccEvent* aEvent)
{
AccTextSelChangeEvent* event = downcast_accEvent(aEvent);
Selection* sel = static_cast<Selection*>(event->mSel.get());
// Fire selection change event if it's not pure caret-move selection change.
if (sel->GetRangeCount() != 1 || !sel->IsCollapsed())
nsEventShell::FireEvent(aEvent);
// Fire caret move event if there's a caret in the selection.
nsINode* caretCntrNode =
nsCoreUtils::GetDOMNodeFromDOMPoint(sel->GetFocusNode(),
sel->GetFocusOffset());
if (!caretCntrNode)
return;
HyperTextAccessible* caretCntr = nsAccUtils::GetTextContainer(caretCntrNode);
NS_ASSERTION(caretCntr,
"No text container for focus while there's one for common ancestor?!");
if (!caretCntr)
return;
int32_t caretOffset = -1;
if (NS_SUCCEEDED(caretCntr->GetCaretOffset(&caretOffset)) && caretOffset != -1) {
nsRefPtr<AccCaretMoveEvent> caretMoveEvent =
new AccCaretMoveEvent(caretCntr, caretOffset, aEvent->FromUserInput());
nsEventShell::FireEvent(caretMoveEvent);
}
}
static gint
getCaretOffsetCB(AtkText *aText)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return 0;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return 0;
int32_t offset;
nsresult rv = text->GetCaretOffset(&offset);
return (NS_FAILED(rv)) ? 0 : static_cast<gint>(offset);
}
void
EventQueue::ProcessEventQueue()
{
// Process only currently queued events.
nsTArray<nsRefPtr<AccEvent> > events;
events.SwapElements(mEvents);
uint32_t eventCount = events.Length();
#ifdef A11Y_LOG
if (eventCount > 0 && logging::IsEnabled(logging::eEvents)) {
logging::MsgBegin("EVENTS", "events processing");
logging::Address("document", mDocument);
logging::MsgEnd();
}
#endif
for (uint32_t idx = 0; idx < eventCount; idx++) {
AccEvent* event = events[idx];
if (event->mEventRule != AccEvent::eDoNotEmit) {
Accessible* target = event->GetAccessible();
if (!target || target->IsDefunct())
continue;
// Dispatch the focus event if target is still focused.
if (event->mEventType == nsIAccessibleEvent::EVENT_FOCUS) {
FocusMgr()->ProcessFocusEvent(event);
continue;
}
// Dispatch caret moved and text selection change events.
if (event->mEventType == nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED) {
AccCaretMoveEvent* caretMoveEvent = downcast_accEvent(event);
HyperTextAccessible* hyperText = target->AsHyperText();
if (hyperText &&
NS_SUCCEEDED(hyperText->GetCaretOffset(&caretMoveEvent->mCaretOffset))) {
nsEventShell::FireEvent(caretMoveEvent);
// There's a selection so fire selection change as well.
int32_t selectionCount;
hyperText->GetSelectionCount(&selectionCount);
if (selectionCount)
nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_TEXT_SELECTION_CHANGED,
hyperText);
}
continue;
}
// Fire selected state change events in support to selection events.
if (event->mEventType == nsIAccessibleEvent::EVENT_SELECTION_ADD) {
nsEventShell::FireEvent(event->mAccessible, states::SELECTED,
true, event->mIsFromUserInput);
} else if (event->mEventType == nsIAccessibleEvent::EVENT_SELECTION_REMOVE) {
nsEventShell::FireEvent(event->mAccessible, states::SELECTED,
false, event->mIsFromUserInput);
} else if (event->mEventType == nsIAccessibleEvent::EVENT_SELECTION) {
AccSelChangeEvent* selChangeEvent = downcast_accEvent(event);
nsEventShell::FireEvent(event->mAccessible, states::SELECTED,
(selChangeEvent->mSelChangeType == AccSelChangeEvent::eSelectionAdd),
event->mIsFromUserInput);
if (selChangeEvent->mPackedEvent) {
nsEventShell::FireEvent(selChangeEvent->mPackedEvent->mAccessible,
states::SELECTED,
(selChangeEvent->mPackedEvent->mSelChangeType == AccSelChangeEvent::eSelectionAdd),
selChangeEvent->mPackedEvent->mIsFromUserInput);
}
}
nsEventShell::FireEvent(event);
// Fire text change events.
AccMutationEvent* mutationEvent = downcast_accEvent(event);
if (mutationEvent) {
if (mutationEvent->mTextChangeEvent)
nsEventShell::FireEvent(mutationEvent->mTextChangeEvent);
}
}
if (event->mEventType == nsIAccessibleEvent::EVENT_HIDE)
mDocument->ShutdownChildrenInSubtree(event->mAccessible);
if (!mDocument)
return;
}
}
