From 790f9ed9653148864b8b01bd38a7c9c77b3d91cc Mon Sep 17 00:00:00 2001
From: Robert Kolner <robert.kolner@gmail.com>
Date: Thu, 15 Mar 2012 17:51:57 +0100
Subject: [PATCH] Added better controls (hard drop, rotate only once) and short
 text on the page about how to control the game.

---
 index.html        | 10 +++++++++-
 tetris-control.js | 26 ++++++++++++++++++++++----
 tetris.js         |  7 +++++++
 3 files changed, 38 insertions(+), 5 deletions(-)

diff --git a/index.html b/index.html
index 4d5d18f..e753dd5 100755
--- a/index.html
+++ b/index.html
@@ -16,6 +16,14 @@
 	</head>
 
 	<body>
-		<canvas id="tetris-board" height="720" width="480" />
+		<div><canvas id="tetris-board" height="720" width="480" /></div>
+
+		<div>
+			<ul style>Controls:
+				<li>a,d - left/right</li>
+				<li>w   - rotate</li>
+				<li>s   - down</li>
+			</ul>
+		</div>
 	</body>
 </html>
diff --git a/tetris-control.js b/tetris-control.js
index 3d3d431..5877c3d 100644
--- a/tetris-control.js
+++ b/tetris-control.js
@@ -1,7 +1,10 @@
 var game = null;
+var wasRecentlyRotated = false;
 
 function doTurn() {
 	document.onkeypress = onKeyPressed;
+	document.onkeydown = onKeyDown;
+	document.onkeyup = onKeyUp;
 	if (game.doTurn()) {
 		window.setTimeout(doTurn, 333);
 	} else {
@@ -9,6 +12,14 @@ function doTurn() {
 	}
 }
 
+function onKeyDown(e) {
+	var ascii_space = 32;
+
+	if (e.keyCode == ascii_space) {
+		game.hardDrop();
+	}
+}
+
 function onKeyPressed(e) {
 	if (String.fromCharCode(e.charCode) == 'a') {
 		game.moveCurrentBrickHorizontally(-1);
@@ -23,14 +34,21 @@ function onKeyPressed(e) {
 	if (String.fromCharCode(e.charCode) == 's') {
 		game.moveCurrentBrickDown();
 		return;
-	}
-	
-	if (String.fromCharCode(e.charCode) == 'w') {
-		game.rotateCurrentBrick();
+	}	
+
+	if (String.fromCharCode(e.keyCode) == 'w') {
+		if (! wasRecentlyRotated) {
+			game.rotateCurrentBrick();
+			wasRecentlyRotated = true;
+		}
 		return;
 	}
 }
 
+function onKeyUp(e) {
+	wasRecentlyRotated = false;
+}
+
 $(document).ready(function() {
 	game = new TetrisGame("tetris-board");
 	doTurn();
diff --git a/tetris.js b/tetris.js
index 4965db1..eb24349 100644
--- a/tetris.js
+++ b/tetris.js
@@ -177,6 +177,13 @@ function TetrisGame(id) {
 		this.resetCurrentBrick();
 		return true;
 	}
+
+	this.hardDrop = function() {	
+		while (this.canCurrentBrickMove(0,-1)) {
+			this.moveCurrentBrickDown();
+		}
+		return this.moveCurrentBrickDown();		
+	}
 	
 	this.rotateCurrentBrick = function() {
 		if (this.canCurrentBrickRotate()) {