Initial replay recording support.

- Added listener and events in Game state to record replay frames.
- Send more accurate keys.

Signed-off-by: Jeffrey Han <itdelatrisu@gmail.com>

src/itdelatrisu/opsu/replay/Replay.java

@@ -237,9 +237,9 @@ public class Replay {
 			// life data
 			StringBuilder sb = new StringBuilder();
 			if (lifeFrames != null) {
-		        NumberFormat nf = new DecimalFormat("##.##");
+				NumberFormat nf = new DecimalFormat("##.##");
 				for (int i = 0; i < lifeFrames.length; i++) {
-			        LifeFrame frame = lifeFrames[i];
+					LifeFrame frame = lifeFrames[i];
 					sb.append(String.format("%d|%s,",
 							frame.getTime(), nf.format(frame.getPercentage())));
 				}

src/itdelatrisu/opsu/replay/ReplayFrame.java

@@ -44,8 +44,16 @@ public class ReplayFrame {
 	private float x, y;
 
 	/** Keys pressed (bitmask). */
-    private int keys;
- 
+	private int keys;
+
+	/**
+	 * Returns the start frame.
+	 * @param t the value for the {@code time} and {@code timeDiff} fields
+	 */
+	public static ReplayFrame getStartFrame(int t) {
+		return new ReplayFrame(t, t, 256, -500, 0);
+	}
+
 	/**
 	 * Constructor.
 	 * @param timeDiff time since the previous action (in ms)
@@ -72,6 +80,11 @@ public class ReplayFrame {
 	 */
 	public int getTimeDiff() { return timeDiff; }
 
+	/**
+	 * Sets the time since the previous action, in milliseconds.
+	 */
+	public void setTimeDiff(int diff) { this.timeDiff = diff; }
+
 	/**
 	 * Returns the scaled cursor x coordinate.
 	 */