AssetBundle improvements

src/lime/utils/AssetBundle.hx

@@ -1,6 +1,9 @@
 package lime.utils;
 
+import haxe.io.BytesInput;
+import haxe.io.Input;
 import haxe.zip.Reader;
+import lime.app.Future;
 import lime.utils.Bytes;
 
 #if sys
@@ -27,6 +30,23 @@ class AssetBundle
 	{
 		#if sys
 		var input = File.read(path);
+		return __extractBundle(input);
+		#else
+		return null;
+		#end
+	}
+
+	public static function loadFromFile(path:String):Future<AssetBundle>
+	{
+		return Bytes.loadFromFile(path).then(function(bytes)
+		{
+			var input = new BytesInput(bytes);
+			return Future.withValue(__extractBundle(input));
+		});
+	}
+
+	@:noCompletion private static function __extractBundle(input:Input):AssetBundle
+	{
 		var entries = Reader.readZip(input);
 
 		var bundle = new AssetBundle();
@@ -46,8 +66,5 @@ class AssetBundle
 		}
 
 		return bundle;
-		#else
-		return null;
-		#end
 	}
 }

src/lime/utils/AssetLibrary.hx

@@ -613,7 +613,7 @@ class AssetLibrary
 
 		if (id != null)
 		{
-			var size = sizes.get(id);
+			var size = sizes.exists(id) ? sizes.get(id) : 0;
 
 			if (!bytesLoadedCache.exists(id))
 			{
@@ -658,6 +658,7 @@ class AssetLibrary
 			{
 				id = Reflect.hasField(asset, "id") ? asset.id : asset.path;
 				data = bundle.data.get(asset.path);
+
 				if (Reflect.hasField(asset, "type"))
 				{
 					type = asset.type;
@@ -753,7 +754,7 @@ class AssetLibrary
 		{
 			id = Reflect.hasField(asset, "id") ? asset.id : asset.path;
 
-			if (preload.exists(id) && preload.get(id))
+			if (preload.exists(id) && preload.get(id) && sizes.exists(id))
 			{
 				bytesTotal += sizes.get(id);
 			}

src/lime/utils/AssetManifest.hx

@@ -77,9 +77,20 @@ class AssetManifest
 		var manifestData = Json.parse(data);
 		var manifest = new AssetManifest();
 
+		if (Reflect.hasField(manifestData, "name"))
+		{
 			manifest.name = manifestData.name;
+		}
+
+		if (Reflect.hasField(manifestData, "libraryType"))
+		{
 			manifest.libraryType = manifestData.libraryType;
+		}
+
+		if (Reflect.hasField(manifestData, "libraryArgs"))
+		{
 			manifest.libraryArgs = manifestData.libraryArgs;
+		}
 
 		if (Reflect.hasField(manifestData, "version") && manifestData.version <= 2)
 		{