NS_IMETHODIMP
nsAutoCompleteController::HandleEndComposition()
{
NS_ENSURE_TRUE(mIsIMEComposing, NS_OK);
mIsIMEComposing = false;
bool forceOpenPopup = mPopupClosedByCompositionStart;
mPopupClosedByCompositionStart = false;
if (!mInput)
return NS_OK;
nsAutoString value;
mInput->GetTextValue(value);
SetSearchString(EmptyString());
if (!value.IsEmpty()) {
// Show the popup with a filtered result set
HandleText();
} else if (forceOpenPopup) {
bool cancel;
HandleKeyNavigation(nsIDOMKeyEvent::DOM_VK_DOWN, &cancel);
}
// On here, |value| and |mSearchString| are same. Therefore, next HandleText should be
// ignored. Because there are no reason to research.
mIgnoreHandleText = true;
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::HandleText()
{
// Note: the events occur in the following order when IME is used.
// 1. a compositionstart event(HandleStartComposition)
// 2. some input events (HandleText), eCompositionState_Composing
// 3. a compositionend event(HandleEndComposition)
// 4. an input event(HandleText), eCompositionState_Committing
// We should do nothing during composition.
if (mCompositionState == eCompositionState_Composing) {
return NS_OK;
}
bool handlingCompositionCommit =
(mCompositionState == eCompositionState_Committing);
bool popupClosedByCompositionStart = mPopupClosedByCompositionStart;
if (handlingCompositionCommit) {
mCompositionState = eCompositionState_None;
mPopupClosedByCompositionStart = false;
}
if (!mInput) {
// Stop all searches in case they are async.
StopSearch();
// Note: if now is after blur and IME end composition,
// check mInput before calling.
// See https://bugzilla.mozilla.org/show_bug.cgi?id=193544#c31
NS_ERROR("Called before attaching to the control or after detaching from the control");
return NS_OK;
}
nsAutoString newValue;
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
input->GetTextValue(newValue);
// Stop all searches in case they are async.
StopSearch();
if (!mInput) {
// StopSearch() can call PostSearchCleanup() which might result
// in a blur event, which could null out mInput, so we need to check it
// again. See bug #395344 for more details
return NS_OK;
}
bool disabled;
input->GetDisableAutoComplete(&disabled);
NS_ENSURE_TRUE(!disabled, NS_OK);
// Don't search again if the new string is the same as the last search
// However, if this is called immediately after compositionend event,
// we need to search the same value again since the search was canceled
// at compositionstart event handler.
if (!handlingCompositionCommit && newValue.Length() > 0 &&
newValue.Equals(mSearchString)) {
return NS_OK;
}
// Determine if the user has removed text from the end (probably by backspacing)
if (newValue.Length() < mSearchString.Length() &&
Substring(mSearchString, 0, newValue.Length()).Equals(newValue))
{
// We need to throw away previous results so we don't try to search through them again
ClearResults();
mBackspaced = true;
} else
mBackspaced = false;
mSearchString = newValue;
// Don't search if the value is empty
if (newValue.Length() == 0) {
// If autocomplete popup was closed by compositionstart event handler,
// we should reopen it forcibly even if the value is empty.
if (popupClosedByCompositionStart && handlingCompositionCommit) {
bool cancel;
HandleKeyNavigation(nsIDOMKeyEvent::DOM_VK_DOWN, &cancel);
return NS_OK;
}
ClosePopup();
return NS_OK;
}
StartSearches();
return NS_OK;
}