void processKeyEvent()

in remote/browser/KeyEventProcessing.cpp [421:583]

• 131 lines of code
• 40 McCabe index (conditional complexity)

void processKeyEvent(
    CefKeyEvent & cef_event,
    int event_type, // event.getID()
    int modifiers,  // event.getModifiersEx()
    char16_t key_char, // event.getKeyChar()
    long scanCode,   // event.scancode, windows only
    int key_code   // event.getKeyCode()
) {
  cef_event.modifiers = GetCefModifiers(modifiers);

#if defined(OS_WIN)
  BYTE VkCode = LOBYTE(MapVirtualKey(scanCode, MAPVK_VSC_TO_VK));
  cef_event.native_key_code = (scanCode << 16) |  // key scan code
                              1;                  // key repeat count
#elif defined(OS_LINUX) || defined(OS_MAC)
#if defined(OS_LINUX)
//  cef_event.native_key_code = JavaKeyCode2X11(env, &cls, key_code);

//  KeyboardCode windows_key_code =
//      KeyboardCodeFromXKeysym(cef_event.native_key_code);
//  cef_event.windows
//      GetWindowsKeyCodeWithoutLocation(windows_key_code);

  if (cef_event.modifiers & EVENTFLAG_ALT_DOWN)
    cef_event.is_system_key = true;

//  if (windows_key_code == JAVA_VKEY_RETURN) {
//    // We need to treat the enter key as a key press of character \r.  This
//    // is apparently just how webkit handles it and what it expects.
//    cef_event.unmodified_character = '\r';
//  } else {
//    cef_event.unmodified_character = key_char != '\n' ? key_char : '\r';
//  }

  // If ctrl key is pressed down, then control character shall be input.
//  if (cef_event.modifiers & EVENTFLAG_CONTROL_DOWN) {
//    cef_event.character = GetControlCharacter(
//        windows_key_code, cef_event.modifiers & EVENTFLAG_SHIFT_DOWN);
//  } else {
//    cef_event.character = cef_event.unmodified_character;
//  }
#elif defined(OS_MAC)
  if (key_code == (JAVA_VK_BACK_SPACE)) {
    cef_event.native_key_code = kVK_Delete;
    cef_event.unmodified_character = kBackspaceCharCode;
  } else if (key_code == (JAVA_VK_DELETE)) {
    cef_event.native_key_code = kVK_ForwardDelete;
    cef_event.unmodified_character = kDeleteCharCode;
  } else if (key_code == (JAVA_VK_DOWN)) {
    cef_event.native_key_code = kVK_DownArrow;
    cef_event.unmodified_character = /* NSDownArrowFunctionKey */ 0xF701;
  } else if (key_code == (JAVA_VK_ENTER)) {
    cef_event.native_key_code = kVK_Return;
    cef_event.unmodified_character = kReturnCharCode;
  } else if (key_code == (JAVA_VK_ESCAPE)) {
    cef_event.native_key_code = kVK_Escape;
    cef_event.unmodified_character = kEscapeCharCode;
  } else if (key_code == (JAVA_VK_LEFT)) {
    cef_event.native_key_code = kVK_LeftArrow;
    cef_event.unmodified_character = /* NSLeftArrowFunctionKey */ 0xF702;
  } else if (key_code == (JAVA_VK_RIGHT)) {
    cef_event.native_key_code = kVK_RightArrow;
    cef_event.unmodified_character = /* NSRightArrowFunctionKey */ 0xF703;
  } else if (key_code == (JAVA_VK_TAB)) {
    cef_event.native_key_code = kVK_Tab;
    cef_event.unmodified_character = kTabCharCode;
  } else if (key_code == (JAVA_VK_UP)) {
    cef_event.native_key_code = kVK_UpArrow;
    cef_event.unmodified_character = /* NSUpArrowFunctionKey */ 0xF700;
  } else {
    cef_event.native_key_code = GetMacKeyCodeFromChar(key_char);
    if (cef_event.native_key_code == -1)
      cef_event.native_key_code = 0;

    if (cef_event.native_key_code == kVK_Return) {
      cef_event.unmodified_character = kReturnCharCode;
    } else {
      cef_event.unmodified_character = key_char;
    }
  }

  cef_event.character = cef_event.unmodified_character;

  // Fill in |character| according to flags.
  if (cef_event.modifiers & EVENTFLAG_SHIFT_DOWN) {
    if (key_char >= '0' && key_char <= '9') {
      cef_event.character = kShiftCharsForNumberKeys[key_char - '0'];
    } else if (key_char >= 'A' && key_char <= 'Z') {
      cef_event.character = 'A' + (key_char - 'A');
    } else {
      switch (cef_event.native_key_code) {
        case kVK_ANSI_Grave:
          cef_event.character = '~';
          break;
        case kVK_ANSI_Minus:
          cef_event.character = '_';
          break;
        case kVK_ANSI_Equal:
          cef_event.character = '+';
          break;
        case kVK_ANSI_LeftBracket:
          cef_event.character = '{';
          break;
        case kVK_ANSI_RightBracket:
          cef_event.character = '}';
          break;
        case kVK_ANSI_Backslash:
          cef_event.character = '|';
          break;
        case kVK_ANSI_Semicolon:
          cef_event.character = ':';
          break;
        case kVK_ANSI_Quote:
          cef_event.character = '\"';
          break;
        case kVK_ANSI_Comma:
          cef_event.character = '<';
          break;
        case kVK_ANSI_Period:
          cef_event.character = '>';
          break;
        case kVK_ANSI_Slash:
          cef_event.character = '?';
          break;
        default:
          break;
      }
    }
  }

  // Control characters.
  if (cef_event.modifiers & EVENTFLAG_CONTROL_DOWN) {
    if (key_char >= 'A' && key_char <= 'Z')
      cef_event.character = 1 + key_char - 'A';
    else if (cef_event.native_key_code == kVK_ANSI_LeftBracket)
      cef_event.character = 27;
    else if (cef_event.native_key_code == kVK_ANSI_Backslash)
      cef_event.character = 28;
    else if (cef_event.native_key_code == kVK_ANSI_RightBracket)
      cef_event.character = 29;
  }
#endif  // defined(OS_MAC)
#endif  // defined(OS_LINUX) || defined(OS_MAC)

  if (event_type == (JAVA_KEY_PRESSED)) {
#if defined(OS_WIN)
    cef_event.windows_key_code = VkCode;
#endif
    cef_event.type = KEYEVENT_RAWKEYDOWN;
  } else if (event_type == (JAVA_KEY_RELEASED)) {
#if defined(OS_WIN)
    cef_event.windows_key_code = VkCode;
    // bits 30 and 31 should always be 1 for WM_KEYUP
    cef_event.native_key_code |= 0xC0000000;
#endif
    cef_event.type = KEYEVENT_KEYUP;
  } else if (event_type == (JAVA_KEY_TYPED)) {
#if defined(OS_WIN)
    cef_event.windows_key_code = key_char == '\n' ? '\r' : key_char;
#endif
    cef_event.type = KEYEVENT_CHAR;
  }
}