(function ()()

in src/vs/base/browser/keyboardEvent.ts [13:166]

• 133 lines of code
• 7 McCabe index (conditional complexity)

(function () {
	for (let i = 0; i < INVERSE_KEY_CODE_MAP.length; i++) {
		INVERSE_KEY_CODE_MAP[i] = -1;
	}

	function define(code: number, keyCode: KeyCode): void {
		KEY_CODE_MAP[code] = keyCode;
		INVERSE_KEY_CODE_MAP[keyCode] = code;
	}

	define(3, KeyCode.PauseBreak); // VK_CANCEL 0x03 Control-break processing
	define(8, KeyCode.Backspace);
	define(9, KeyCode.Tab);
	define(13, KeyCode.Enter);
	define(16, KeyCode.Shift);
	define(17, KeyCode.Ctrl);
	define(18, KeyCode.Alt);
	define(19, KeyCode.PauseBreak);
	define(20, KeyCode.CapsLock);
	define(27, KeyCode.Escape);
	define(32, KeyCode.Space);
	define(33, KeyCode.PageUp);
	define(34, KeyCode.PageDown);
	define(35, KeyCode.End);
	define(36, KeyCode.Home);
	define(37, KeyCode.LeftArrow);
	define(38, KeyCode.UpArrow);
	define(39, KeyCode.RightArrow);
	define(40, KeyCode.DownArrow);
	define(45, KeyCode.Insert);
	define(46, KeyCode.Delete);

	define(48, KeyCode.KEY_0);
	define(49, KeyCode.KEY_1);
	define(50, KeyCode.KEY_2);
	define(51, KeyCode.KEY_3);
	define(52, KeyCode.KEY_4);
	define(53, KeyCode.KEY_5);
	define(54, KeyCode.KEY_6);
	define(55, KeyCode.KEY_7);
	define(56, KeyCode.KEY_8);
	define(57, KeyCode.KEY_9);

	define(65, KeyCode.KEY_A);
	define(66, KeyCode.KEY_B);
	define(67, KeyCode.KEY_C);
	define(68, KeyCode.KEY_D);
	define(69, KeyCode.KEY_E);
	define(70, KeyCode.KEY_F);
	define(71, KeyCode.KEY_G);
	define(72, KeyCode.KEY_H);
	define(73, KeyCode.KEY_I);
	define(74, KeyCode.KEY_J);
	define(75, KeyCode.KEY_K);
	define(76, KeyCode.KEY_L);
	define(77, KeyCode.KEY_M);
	define(78, KeyCode.KEY_N);
	define(79, KeyCode.KEY_O);
	define(80, KeyCode.KEY_P);
	define(81, KeyCode.KEY_Q);
	define(82, KeyCode.KEY_R);
	define(83, KeyCode.KEY_S);
	define(84, KeyCode.KEY_T);
	define(85, KeyCode.KEY_U);
	define(86, KeyCode.KEY_V);
	define(87, KeyCode.KEY_W);
	define(88, KeyCode.KEY_X);
	define(89, KeyCode.KEY_Y);
	define(90, KeyCode.KEY_Z);

	define(93, KeyCode.ContextMenu);

	define(96, KeyCode.NUMPAD_0);
	define(97, KeyCode.NUMPAD_1);
	define(98, KeyCode.NUMPAD_2);
	define(99, KeyCode.NUMPAD_3);
	define(100, KeyCode.NUMPAD_4);
	define(101, KeyCode.NUMPAD_5);
	define(102, KeyCode.NUMPAD_6);
	define(103, KeyCode.NUMPAD_7);
	define(104, KeyCode.NUMPAD_8);
	define(105, KeyCode.NUMPAD_9);
	define(106, KeyCode.NUMPAD_MULTIPLY);
	define(107, KeyCode.NUMPAD_ADD);
	define(108, KeyCode.NUMPAD_SEPARATOR);
	define(109, KeyCode.NUMPAD_SUBTRACT);
	define(110, KeyCode.NUMPAD_DECIMAL);
	define(111, KeyCode.NUMPAD_DIVIDE);

	define(112, KeyCode.F1);
	define(113, KeyCode.F2);
	define(114, KeyCode.F3);
	define(115, KeyCode.F4);
	define(116, KeyCode.F5);
	define(117, KeyCode.F6);
	define(118, KeyCode.F7);
	define(119, KeyCode.F8);
	define(120, KeyCode.F9);
	define(121, KeyCode.F10);
	define(122, KeyCode.F11);
	define(123, KeyCode.F12);
	define(124, KeyCode.F13);
	define(125, KeyCode.F14);
	define(126, KeyCode.F15);
	define(127, KeyCode.F16);
	define(128, KeyCode.F17);
	define(129, KeyCode.F18);
	define(130, KeyCode.F19);

	define(144, KeyCode.NumLock);
	define(145, KeyCode.ScrollLock);

	define(186, KeyCode.US_SEMICOLON);
	define(187, KeyCode.US_EQUAL);
	define(188, KeyCode.US_COMMA);
	define(189, KeyCode.US_MINUS);
	define(190, KeyCode.US_DOT);
	define(191, KeyCode.US_SLASH);
	define(192, KeyCode.US_BACKTICK);
	define(193, KeyCode.ABNT_C1);
	define(194, KeyCode.ABNT_C2);
	define(219, KeyCode.US_OPEN_SQUARE_BRACKET);
	define(220, KeyCode.US_BACKSLASH);
	define(221, KeyCode.US_CLOSE_SQUARE_BRACKET);
	define(222, KeyCode.US_QUOTE);
	define(223, KeyCode.OEM_8);

	define(226, KeyCode.OEM_102);

	/**
	 * https://lists.w3.org/Archives/Public/www-dom/2010JulSep/att-0182/keyCode-spec.html
	 * If an Input Method Editor is processing key input and the event is keydown, return 229.
	 */
	define(229, KeyCode.KEY_IN_COMPOSITION);

	if (browser.isIE) {
		define(91, KeyCode.Meta);
	} else if (browser.isFirefox) {
		define(59, KeyCode.US_SEMICOLON);
		define(107, KeyCode.US_EQUAL);
		define(109, KeyCode.US_MINUS);
		if (platform.isMacintosh) {
			define(224, KeyCode.Meta);
		}
	} else if (browser.isWebKit) {
		define(91, KeyCode.Meta);
		if (platform.isMacintosh) {
			// the two meta keys in the Mac have different key codes (91 and 93)
			define(93, KeyCode.Meta);
		} else {
			define(92, KeyCode.Meta);
		}
	}
})();