Added PlayerToggleSprint event and sprinting related API.

src/main/java/net/minecraft/server/NetServerHandler.java

@@ -28,6 +28,7 @@ import org.bukkit.event.player.PlayerKickEvent;
 import org.bukkit.event.player.PlayerMoveEvent;
 import org.bukkit.event.player.PlayerTeleportEvent;
 import org.bukkit.event.player.PlayerToggleSneakEvent;
+import org.bukkit.event.player.PlayerToggleSprintEvent;
 // CraftBukkit end
 
 public class NetServerHandler extends NetHandler implements ICommandListener {
@@ -846,6 +847,15 @@ public class NetServerHandler extends NetHandler implements ICommandListener {
                 return;
             }
         }
+
+        if (packet19entityaction.animation == 4 || packet19entityaction.animation == 5) {
+            PlayerToggleSprintEvent event = new PlayerToggleSprintEvent(this.getPlayer(), packet19entityaction.animation == 4);
+            this.server.getPluginManager().callEvent(event);
+
+            if (event.isCancelled()) {
+                return;
+            }
+        }
         // CraftBukkit end
 
         if (packet19entityaction.animation == 1) {

src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java

@@ -298,6 +298,14 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         return getHandle().isSneaking();
     }
 
+    public boolean isSprinting() {
+        return getHandle().at();
+    }
+
+    public void setSprinting(boolean sprinting) {
+        getHandle().g(sprinting);
+    }
+
     public void loadData() {
         server.getHandle().playerFileData.b(getHandle());
     }