some tweaks and new functions for the plugin system

org/flixel/FlxG.as

@@ -930,30 +930,88 @@ package org.flixel
 		 */
 		static public function addPlugin(Plugin:FlxBasic):FlxBasic
 		{
-			plugins.push(Plugin);
+			//Don't add repeats
+			var pluginList:Array = FlxG.plugins;
+			var i:uint = 0;
+			var l:uint = pluginList.length;
+			while(i < l)
+			{
+				if(pluginList[i++].toString() == Plugin.toString())
+					return Plugin;
+			}
+
+			//no repeats! safe to add a new instance of this plugin
+			pluginList.push(Plugin);
 			return Plugin;
 		}
 
 		/**
-		 * Retrieves a plugin from the global plugin array.
+		 * Retrieves a plugin based on its class name from the global plugin array.
 		 * 
-		 * @param	ClassType	Useful for retrieving plugins based on their type. See the <code>FlxPath</code> or <code>FlxTimer</code> constructors for example usage.
+		 * @param	ClassType	The class name of the plugin you want to retrieve. See the <code>FlxPath</code> or <code>FlxTimer</code> constructors for example usage.
 		 * 
 		 * @return	The plugin object, or null if no matching plugin was found.
 		 */
 		static public function getPlugin(ClassType:Class):FlxBasic
 		{
+			var pluginList:Array = FlxG.plugins;
 			var i:uint = 0;
-			var l:uint = plugins.length;
+			var l:uint = pluginList.length;
 			while(i < l)
 			{
-				if(plugins[i] is ClassType)
+				if(pluginList[i++] is ClassType)
 					return plugins[i];
 				i++;
 			}
 			return null;
 		}
 
+		/**
+		 * Removes an instance of a plugin from the global plugin array.
+		 * 
+		 * @param	Plugin	The plugin instance you want to remove.
+		 * 
+		 * @return	The same <code>FlxBasic</code>-based plugin you passed in.
+		 */
+		static public function removePlugin(Plugin:FlxBasic):FlxBasic
+		{
+			//Don't add repeats
+			var pluginList:Array = FlxG.plugins;
+			var i:int = pluginList.length-1;
+			while(i >= 0)
+			{
+				if(pluginList[i] == Plugin)
+					pluginList.splice(i,1);
+				i--;
+			}
+			return Plugin;
+		}
+
+		/**
+		 * Removes an instance of a plugin from the global plugin array.
+		 * 
+		 * @param	ClassType	The class name of the plugin type you want removed from the array.
+		 * 
+		 * @return	Whether or not at least one instance of this plugin type was removed.
+		 */
+		static public function removePluginType(ClassType:Class):Boolean
+		{
+			//Don't add repeats
+			var results:Boolean = false;
+			var pluginList:Array = FlxG.plugins;
+			var i:int = pluginList.length-1;
+			while(i >= 0)
+			{
+				if(pluginList[i] is ClassType)
+				{
+					pluginList.splice(i,1);
+					results = true;
+				}
+				i--;
+			}
+			return results;
+		}
+
 		/**
 		 * Called by <code>FlxGame</code> to set up <code>FlxG</code> during <code>FlxGame</code>'s constructor.
 		 */

org/flixel/FlxGame.as

@@ -472,7 +472,7 @@ package org.flixel
 			FlxG.destroySounds();
 			if(_debugger != null)
 				_debugger.watch.removeAll();
-			var timerManager:TimerManager = FlxG.getPlugin(TimerManager) as TimerManager;
+			var timerManager:TimerManager = FlxTimer.manager;
 			if(timerManager != null)
 				timerManager.clear();
 

org/flixel/FlxPath.as

@@ -49,19 +49,19 @@ package org.flixel
 			debugScrollFactor = new FlxPoint(1.0,1.0);
 			debugColor = 0xffffff;
 
-			var plugin:DebugPathDisplay = FlxG.getPlugin(DebugPathDisplay) as DebugPathDisplay;
-			if(plugin != null)
-				plugin.add(this);
+			var debugPathDisplay:DebugPathDisplay = manager;
+			if(debugPathDisplay != null)
+				debugPathDisplay.add(this);
 		}
 
 		/**
 		 * Clean up memory.
 		 */
 		public function destroy():void
 		{
-			var plugin:DebugPathDisplay = FlxG.getPlugin(DebugPathDisplay) as DebugPathDisplay;
-			if(plugin != null)
-				plugin.remove(this);
+			var debugPathDisplay:DebugPathDisplay = manager;
+			if(debugPathDisplay != null)
+				debugPathDisplay.remove(this);
 
 			debugScrollFactor = null;
 			_point = null;
@@ -264,5 +264,10 @@ package org.flixel
 			//then stamp the path down onto the game buffer
 			Camera.buffer.draw(FlxG.flashGfxSprite);
 		}
+
+		static public function get manager():DebugPathDisplay
+		{
+			return FlxG.getPlugin(DebugPathDisplay) as DebugPathDisplay;
+		}
 	}
 }

org/flixel/FlxTimer.as

@@ -58,9 +58,9 @@ package org.flixel
 			paused = false;
 			finished = false;
 
-			var plugin:TimerManager = FlxG.getPlugin(TimerManager) as TimerManager;
-			if(plugin != null)
-				plugin.add(this);
+			var timerManager:TimerManager = manager;
+			if(timerManager != null)
+				timerManager.add(this);
 		}
 
 		/**
@@ -129,9 +129,9 @@ package org.flixel
 		public function stop():void
 		{
 			finished = true;
-			var plugin:TimerManager = FlxG.getPlugin(TimerManager) as TimerManager;
-			if(plugin != null)
-				plugin.remove(this);
+			var timerManager:TimerManager = manager;
+			if(timerManager != null)
+				timerManager.remove(this);
 		}
 
 		/**
@@ -149,5 +149,10 @@ package org.flixel
 		{
 			return loops-_loopsCounter;
 		}
+
+		static public function get manager():TimerManager
+		{
+			return FlxG.getPlugin(TimerManager) as TimerManager;
+		}
 	}
 }