DT-Sudoku-Web-Browser-Version/DTSudokuBridgeKeyboardJavascript.js at master · dtsudo/DT-Sudoku-Web-Browser-Version · GitHub

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DTSudokuBridgeKeyboardJavascript = ((function () {
	"use strict";

	var keysBeingPressed = [];

	var mapKeyToCanonicalKey = function (key) {
		if (key === "A")
			return "a";
		if (key === "B")
			return "b";
		if (key === "C")
			return "c";
		if (key === "D")
			return "d";
		if (key === "E")
			return "e";
		if (key === "F")
			return "f";
		if (key === "G")
			return "g";
		if (key === "H")
			return "h";
		if (key === "I")
			return "i";
		if (key === "J")
			return "j";
		if (key === "K")
			return "k";
		if (key === "L")
			return "l";
		if (key === "M")
			return "m";
		if (key === "N")
			return "n";
		if (key === "O")
			return "o";
		if (key === "P")
			return "p";
		if (key === "Q")
			return "q";
		if (key === "R")
			return "r";
		if (key === "S")
			return "s";
		if (key === "T")
			return "t";
		if (key === "U")
			return "u";
		if (key === "V")
			return "v";
		if (key === "W")
			return "w";
		if (key === "X")
			return "x";
		if (key === "Y")
			return "y";
		if (key === "Z")
			return "z";
		if (key === "!")
			return "1";
		if (key === "@")
			return "2";
		if (key === "#")
			return "3";
		if (key === "$")
			return "4";
		if (key === "%")
			return "5";
		if (key === "^")
			return "6";
		if (key === "&")
			return "7";
		if (key === "*")
			return "8";
		if (key === "(")
			return "9";
		if (key === ")")
			return "0";

		return key;
	};

	var keyDownHandler = function (e) {

		var key = mapKeyToCanonicalKey(e.key);

		for (var i = 0; i < keysBeingPressed.length; i++) {
			if (keysBeingPressed[i] === key)
				return;
		}

		keysBeingPressed.push(key);
	};

	var keyUpHandler = function (e) {
		var key = mapKeyToCanonicalKey(e.key);

		var newArray = [];

		for (var i = 0; i < keysBeingPressed.length; i++) {
			if (keysBeingPressed[i] !== key)
				newArray.push(keysBeingPressed[i]);
		}

		keysBeingPressed = newArray;
	};

	document.addEventListener("keydown", function (e) { keyDownHandler(e); }, false);
	document.addEventListener("keyup", function (e) { keyUpHandler(e); }, false);

	var isKeyPressed = function (k) {
		for (var i = 0; i < keysBeingPressed.length; i++) {
			if (keysBeingPressed[i] === k)
				return true;
		}

		return false;
	};

	return {
		isKeyPressed: isKeyPressed
	};
})());