From 352c3aa16d6f8185388edabd18e7e54d6326eaf6 Mon Sep 17 00:00:00 2001
From: Nathan DECHER <nathan.decher@gmail.com>
Date: Thu, 26 Mar 2020 12:04:18 +0100
Subject: [PATCH] touchscreen input no longer buffers

---
 src/js/main.js | 12 ++++++++----
 src/js/snek.js |  6 ++++++
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/src/js/main.js b/src/js/main.js
index 71b4f54..14339f3 100644
--- a/src/js/main.js
+++ b/src/js/main.js
@@ -90,11 +90,10 @@
 			}
 		};
 		currentGame=snek;
-		//XXX
-		window.snek=snek;
 	});
 
 	window.addEventListener('keydown', async e => {
+		e.preventDefault();
 		if(e.key=='f') {
 			if(document.fullscreenElement) await document.exitFullscreen();
 			else await main.requestFullscreen();
@@ -108,7 +107,8 @@
 		else if(e.key=='ArrowRight') inputs.right=true;
 	});
 
-	window.addEventListener('touchstart', e => {
+	const handleTouch=e => {
+		e.preventDefault();
 		let x=e.touches[0].clientX/window.innerWidth-.5;
 		let y=e.touches[0].clientY/window.innerHeight-.5;
 		const angle=((Math.atan2(x, y)+2*Math.PI)%(2*Math.PI))/Math.PI;
@@ -118,6 +118,10 @@
 		else if(angle>.75 && angle<1.25) inputs.up=true;
 		else if(angle>1.25 && angle<1.75) inputs.left=true;
 		else inputs.down=true;
-	});
+
+		inputs.clearBuffer=true;
+	};
+	window.addEventListener('touchstart', handleTouch);
+	window.addEventListener('touchmove', handleTouch);
 
 })();
diff --git a/src/js/snek.js b/src/js/snek.js
index 710ff90..271a33e 100644
--- a/src/js/snek.js
+++ b/src/js/snek.js
@@ -322,6 +322,12 @@ class SnekGame {
 		else if(inputs.right && trySet([ 1, 0])) return delete inputs.right;
 		else if(inputs.up && trySet([ 0,-1])) return delete inputs.up;
 		else if(inputs.down &&  trySet([ 0, 1])) return delete inputs.down;
+
+		if(inputs.clearBuffer) {
+			Object
+				.keys(inputs)
+				.forEach(k => delete inputs[k]);
+		}
 	}
 
 	start() {