void InputMethodController::cancelComposition()
{
if (!hasComposition())
return;
Editor::RevealSelectionScope revealSelectionScope(&editor());
if (frame().selection().isNone())
return;
dispatchCompositionEndEvent(frame(), emptyString());
clear();
insertTextForConfirmedComposition(emptyString());
// An open typing command that disagrees about current selection would cause
// issues with typing later on.
TypingCommand::closeTyping(m_frame);
}
bool InputMethodController::confirmComposition(const String& text, ConfirmCompositionBehavior confirmBehavior)
{
if (!hasComposition())
return false;
Optional<Editor::RevealSelectionScope> revealSelectionScope;
if (confirmBehavior == KeepSelection)
revealSelectionScope.emplace(&editor());
// If the composition was set from existing text and didn't change, then
// there's nothing to do here (and we should avoid doing anything as that
// may clobber multi-node styled text).
if (!m_isDirty && composingText() == text) {
clear();
return true;
}
// Select the text that will be deleted or replaced.
selectComposition();
if (frame().selection().isNone())
return false;
dispatchCompositionEndEvent(frame(), text);
if (!frame().document())
return false;
// If text is empty, then delete the old composition here. If text is
// non-empty, InsertTextCommand::input will delete the old composition with
// an optimized replace operation.
if (text.isEmpty())
TypingCommand::deleteSelection(*frame().document(), 0);
clear();
insertTextForConfirmedComposition(text);
return true;
}