Starting on keyboard stuff

keyboard.ts

@@ -0,0 +1,84 @@
+const keyboard = new Map<string, {first: boolean, repeat: boolean, held: boolean}>();
+
+export const K = {
+	ESCAPE: 256,
+	ENTER: 257,
+	TAB: 258,
+	BACKSPACE: 259,
+	DELETE: 261,
+	ARROW_RIGHT: 262,
+	ARROW_LEFT: 263,
+	ARROW_DOWN: 264,
+	ARROW_UP: 265,
+	CAPS_LOCK: 280,
+	F1: 290,
+	F2: 291,
+	F3: 292,
+	F4: 293,
+	F5: 294,
+	F6: 295,
+	F7: 296,
+	F8: 297,
+	F9: 298,
+	F10: 299,
+	F11: 300,
+	F12: 301,
+	SHIFT_LEFT: 340,
+	CTRL_LEFT: 341,
+	ALT_LEFT: 342,
+	SHIFT_RIGHT: 344,
+	CTRL_RIGHT: 345,
+	ALT_RIGHT: 346,
+}
+
+addEventListener("keydown", (evt) => {
+	console.log("keydown", evt.key, evt.key.charCodeAt(0));
+	const isRepeat = keyboard.has(evt.key) && keyboard.get(evt.key)?.held!;
+	keyboard.set(evt.key, {
+		first: !isRepeat,
+		repeat: isRepeat,
+		held: true,
+	});
+});
+
+addEventListener("keyup", (evt) => {
+	console.log("keyup", evt.key, evt.key.charCodeAt(0));
+	keyboard.set(evt.key, {
+		first: false,
+		repeat: false,
+		held: false,
+	});
+});
+
+export const refreshKeyboard = () => {
+	keyboard.forEach(({held}, key) => {
+		if (!held) {
+			keyboard.delete(key);
+		} else {
+			keyboard.set(key, {
+				first: false,
+				repeat: false,
+				held: true,
+			});
+		}
+	})
+}
+
+export const keyPressed = (key: string) => {
+	return keyboard.has(key) && keyboard.get(key)?.repeat!;
+}
+
+export const keyDown = (key: string) => {
+	return keyboard.has(key) && keyboard.get(key)?.held!;
+}
+
+export const keyReleased = (key: string) => {
+	return keyboard.has(key) && !keyboard.get(key)?.held!;
+}
+
+export const getKeysPressed = () => {
+	const result = [...keyboard.entries()].filter(([_key, value]) => {
+		return value.first || value.repeat;
+	}).map(([key]) => key);
+	return result;
+}