From b3950330e3351437f153c6c1debb3821d6e28864 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Sat, 8 Dec 2018 12:39:18 +0100
Subject: Create Electron app

---
 src/renderer/view/input/inputhandler.ts | 44 +++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 src/renderer/view/input/inputhandler.ts

(limited to 'src/renderer/view/input/inputhandler.ts')

diff --git a/src/renderer/view/input/inputhandler.ts b/src/renderer/view/input/inputhandler.ts
new file mode 100644
index 0000000..17abfe6
--- /dev/null
+++ b/src/renderer/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);
+	}
+}
-- 
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