void InputMethodController::extendSelectionAndDelete(int before, int after)
{
if (!editor().canEdit())
return;
PlainTextRange selectionOffsets(getSelectionOffsets());
if (selectionOffsets.isNull())
return;
// A common call of before=1 and after=0 will fail if the last character
// is multi-code-word UTF-16, including both multi-16bit code-points and
// Unicode combining character sequences of multiple single-16bit code-
// points (officially called "compositions"). Try more until success.
// http://crbug.com/355995
//
// FIXME: Note that this is not an ideal solution when this function is
// called to implement "backspace". In that case, there should be some call
// that will not delete a full multi-code-point composition but rather
// only the last code-point so that it's possible for a user to correct
// a composition without starting it from the beginning.
// http://crbug.com/37993
do {
if (!setSelectionOffsets(PlainTextRange(std::max(static_cast<int>(selectionOffsets.start()) - before, 0), selectionOffsets.end() + after)))
return;
if (before == 0)
break;
++before;
} while (frame().selection().start() == frame().selection().end() && before <= static_cast<int>(selectionOffsets.start()));
TypingCommand::deleteSelection(*frame().document());
}
void InputMethodController::extendSelectionAndDelete(int before, int after)
{
if (!editor().canEdit())
return;
PlainTextRange selectionOffsets(getSelectionOffsets());
if (selectionOffsets.isNull())
return;
setSelectionOffsets(PlainTextRange(std::max(static_cast<int>(selectionOffsets.start()) - before, 0), selectionOffsets.end() + after));
TypingCommand::deleteSelection(*m_frame.document());
}