2 files changed, 122 insertions, 0 deletions
diff --git a/src/renderer/runtime/view/input/gameinput.ts b/src/renderer/runtime/view/input/gameinput.ts
new file mode 100644
index 0000000..67fbe0c
--- /dev/null
+++ b/src/renderer/runtime/view/input/gameinput.ts
@@ -0,0 +1,78 @@
+import { InputHandler } from './inputhandler';
+
+import { Listenable } from '../../util';
+
+import { vec2 } from 'gl-matrix';
+
+export enum ButtonCode {
+	Action,
+	Back,
+	Menu,
+}
+
+const buttonMapping: Record<string, ButtonCode> = {
+	KeyZ: ButtonCode.Action,
+	KeyX: ButtonCode.Back,
+	KeyC: ButtonCode.Menu,
+};
+
+export interface DirectionInput {
+	type: 'direction';
+	direction: vec2;
+}
+
+export interface ButtonInput {
+	type: 'button';
+	button: ButtonCode;
+}
+
+export type GameInput = DirectionInput | ButtonInput;
+
+export class GameInputHandler extends Listenable<[GameInput]> {
+	private readonly input: InputHandler;
+
+	constructor() {
+		super();
+
+		this.input = new InputHandler(
+			new Set([
+				'ArrowLeft',
+				'ArrowUp',
+				'ArrowRight',
+				'ArrowDown',
+				...Object.keys(buttonMapping),
+			]));
+
+		this.input.addListener((key: string, pressed: boolean) => {
+			const button = buttonMapping[key];
+			if (button !== undefined) {
+				if (pressed)
+					this.runListeners({
+						type: 'button',
+						button,
+					});
+
+				return;
+			}
+
+			const dir = vec2.create();
+
+			if (this.input.has('ArrowLeft'))
+				vec2.add(dir, dir, [-1, 0]);
+			if (this.input.has('ArrowUp'))
+				vec2.add(dir, dir, [0, -1]);
+			if (this.input.has('ArrowRight'))
+				vec2.add(dir, dir, [1, 0]);
+			if (this.input.has('ArrowDown'))
+				vec2.add(dir, dir, [0, 1]);
+
+			if (vec2.sqrLen(dir) > 0)
+				vec2.normalize(dir, dir);
+
+			this.runListeners({
+				type: 'direction',
+				direction: dir,
+			});
+		});
+	}
+}
diff --git a/src/renderer/runtime/view/input/inputhandler.ts b/src/renderer/runtime/view/input/inputhandler.ts
new file mode 100644
index 0000000..17abfe6
--- /dev/null
+++ b/src/renderer/runtime/view/input/inputhandler.ts
@@ -0,0 +1,44 @@
+import { Listenable } from '../../util';
+
+export class InputHandler extends Listenable<[string, boolean]> {
+	private readonly keys: Set<string> = new Set();
+
+	constructor(relevantKeys: Set<string>) {
+		super();
+
+		window.addEventListener('keydown', (ev) => {
+			if (!relevantKeys.has(ev.code))
+				return;
+
+			ev.preventDefault();
+
+			if (ev.repeat)
+				return;
+
+			this.keys.add(ev.code);
+			this.runListeners(ev.code, true);
+		});
+
+		window.addEventListener('keyup', (ev) => {
+			if (!relevantKeys.has(ev.code))
+				return;
+
+			ev.preventDefault();
+
+			if (!this.keys.has(ev.code))
+				return;
+
+			this.keys.delete(ev.code);
+			this.runListeners(ev.code, false);
+		});
+
+		window.addEventListener('blur', () => {
+			this.keys.clear();
+			this.runListeners('', false);
+		});
+	}
+
+	public has(key: string): boolean {
+		return this.keys.has(key);
+	}
+}