std::pair ConvertKeyCodeToText()

in src/keyboard_mac.mm [16:68]
46 lines of code
11 McCabe index (conditional complexity)

std::pair<bool,std::string> ConvertKeyCodeToText(const UCKeyboardLayout* keyboardLayout, int mac_key_code, int modifiers) {

  int mac_modifiers = 0;
  if (modifiers & kShiftKeyModifierMask)
    mac_modifiers |= shiftKey;
  if (modifiers & kControlKeyModifierMask)
    mac_modifiers |= controlKey;
  if (modifiers & kAltKeyModifierMask)
    mac_modifiers |= optionKey;
  if (modifiers & kMetaKeyModifierMask)
    mac_modifiers |= cmdKey;

  // Convert EventRecord modifiers to format UCKeyTranslate accepts. See docs
  // on UCKeyTranslate for more info.
  UInt32 modifier_key_state = (mac_modifiers >> 8) & 0xFF;

  UInt32 dead_key_state = 0;
  UniCharCount char_count = 0;
  UniChar character = 0;
  OSStatus status = UCKeyTranslate(
      keyboardLayout,
      static_cast<UInt16>(mac_key_code),
      kUCKeyActionDown,
      modifier_key_state,
      LMGetKbdLast(),
      kUCKeyTranslateNoDeadKeysBit,
      &dead_key_state,
      1,
      &char_count,
      &character);

  bool isDeadKey = false;
  if (status == noErr && char_count == 0 && dead_key_state != 0) {
    isDeadKey = true;
    status = UCKeyTranslate(
        keyboardLayout,
        static_cast<UInt16>(mac_key_code),
        kUCKeyActionDown,
        modifier_key_state,
        LMGetKbdLast(),
        kUCKeyTranslateNoDeadKeysBit,
        &dead_key_state,
        1,
        &char_count,
        &character);
  }

  if (status == noErr && char_count == 1 && !std::iscntrl(character)) {
    wchar_t value = character;
    return std::make_pair(isDeadKey, vscode_keyboard::UTF16toUTF8(&value, 1));
  }
  return std::make_pair(false, std::string());
}