/*******************************************************************************
* Copyright 2011 See AUTHORS file.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package com.badlogic.gdx.maps.tiled;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.StringTokenizer;
import java.util.zip.DataFormatException;
import java.util.zip.GZIPInputStream;
import java.util.zip.Inflater;
import com.badlogic.gdx.assets.AssetDescriptor;
import com.badlogic.gdx.assets.AssetLoaderParameters;
import com.badlogic.gdx.assets.AssetManager;
import com.badlogic.gdx.assets.loaders.AsynchronousAssetLoader;
import com.badlogic.gdx.assets.loaders.FileHandleResolver;
import com.badlogic.gdx.assets.loaders.TextureLoader;
import com.badlogic.gdx.assets.loaders.TextureLoader.TextureParameter;
import com.badlogic.gdx.assets.loaders.resolvers.InternalFileHandleResolver;
import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.Texture.TextureFilter;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.maps.ImageResolver;
import com.badlogic.gdx.maps.ImageResolver.AssetManagerImageResolver;
import com.badlogic.gdx.maps.ImageResolver.DirectImageResolver;
import com.badlogic.gdx.maps.MapLayer;
import com.badlogic.gdx.maps.MapObject;
import com.badlogic.gdx.maps.MapProperties;
import com.badlogic.gdx.maps.objects.EllipseMapObject;
import com.badlogic.gdx.maps.objects.PolygonMapObject;
import com.badlogic.gdx.maps.objects.PolylineMapObject;
import com.badlogic.gdx.maps.objects.RectangleMapObject;
import com.badlogic.gdx.maps.tiled.TiledMapTileLayer.Cell;
import com.badlogic.gdx.maps.tiled.tiles.StaticTiledMapTile;
import com.badlogic.gdx.math.Polygon;
import com.badlogic.gdx.math.Polyline;
import com.badlogic.gdx.utils.Array;
import com.badlogic.gdx.utils.Base64Coder;
import com.badlogic.gdx.utils.GdxRuntimeException;
import com.badlogic.gdx.utils.ObjectMap;
import com.badlogic.gdx.utils.XmlReader;
import com.badlogic.gdx.utils.XmlReader.Element;
/** @brief synchronous loader for TMX maps created with the Tiled tool */
public class TmxMapLoader extends AsynchronousAssetLoader<TiledMap, TmxMapLoader.Parameters> {
public static class Parameters extends AssetLoaderParameters<TiledMap> {
/** Whether to load the map for a y-up coordinate system */
public boolean yUp = true;
/** generate mipmaps? **/
public boolean generateMipMaps = false;
/** The TextureFilter to use for minification **/
public TextureFilter textureMinFilter = TextureFilter.Nearest;
/** The TextureFilter to use for magnification **/
public TextureFilter textureMagFilter = TextureFilter.Nearest;
}
protected static final int FLAG_FLIP_HORIZONTALLY = 0x80000000;
protected static final int FLAG_FLIP_VERTICALLY = 0x40000000;
protected static final int FLAG_FLIP_DIAGONALLY = 0x20000000;
protected static final int MASK_CLEAR = 0xE0000000;
protected XmlReader xml = new XmlReader();
protected Element root;
protected boolean yUp;
protected int mapWidthInPixels;
protected int mapHeightInPixels;
protected TiledMap map;
public TmxMapLoader () {
super(new InternalFileHandleResolver());
}
/** Creates loader
*
* @param resolver */
public TmxMapLoader (FileHandleResolver resolver) {
super(resolver);
}
/** Loads the {@link TiledMap} from the given file. The file is resolved via the {@link FileHandleResolver} set in the
* constructor of this class. By default it will resolve to an internal file. The map will be loaded for a y-up coordinate
* system.
* @param fileName the filename
* @return the TiledMap */
public TiledMap load (String fileName) {
return load(fileName, new TmxMapLoader.Parameters());
}
/** Loads the {@link TiledMap} from the given file. The file is resolved via the {@link FileHandleResolver} set in the
* constructor of this class. By default it will resolve to an internal file.
* @param fileName the filename
* @param parameters specifies whether to use y-up, generate mip maps etc.
* @return the TiledMap */
public TiledMap load (String fileName, TmxMapLoader.Parameters parameters) {
try {
this.yUp = parameters.yUp;
FileHandle tmxFile = resolve(fileName);
root = xml.parse(tmxFile);
ObjectMap<String, Texture> textures = new ObjectMap<String, Texture>();
for (FileHandle textureFile : loadTilesets(root, tmxFile)) {
Texture texture = new Texture(textureFile, parameters.generateMipMaps);
texture.setFilter(parameters.textureMinFilter, parameters.textureMagFilter);
textures.put(textureFile.path(), texture);
}
DirectImageResolver imageResolver = new DirectImageResolver(textures);
TiledMap map = loadTilemap(root, tmxFile, imageResolver);
map.setOwnedResources(textures.values().toArray());
return map;
} catch (IOException e) {
throw new GdxRuntimeException("Couldn't load tilemap '" + fileName + "'", e);
}
}
@Override
public void loadAsync (AssetManager manager, String fileName, FileHandle tmxFile, TmxMapLoader.Parameters parameter) {
map = null;
if (parameter != null) {
yUp = parameter.yUp;
} else {
yUp = true;
}
try {
map = loadTilemap(root, tmxFile, new AssetManagerImageResolver(manager));
} catch (Exception e) {
throw new GdxRuntimeException("Couldn't load tilemap '" + fileName + "'", e);
}
}
@Override
public TiledMap loadSync (AssetManager manager, String fileName, FileHandle file, TmxMapLoader.Parameters parameter) {
return map;
}
/** Retrieves TiledMap resource dependencies
*
* @param fileName
* @param parameter not used for now
* @return dependencies for the given .tmx file */
@Override
public Array<AssetDescriptor> getDependencies (String fileName, FileHandle tmxFile, Parameters parameter) {
Array<AssetDescriptor> dependencies = new Array<AssetDescriptor>();
try {
root = xml.parse(tmxFile);
boolean generateMipMaps = (parameter != null ? parameter.generateMipMaps : false);
TextureLoader.TextureParameter texParams = new TextureParameter();
texParams.genMipMaps = generateMipMaps;
if (parameter != null) {
texParams.minFilter = parameter.textureMinFilter;
texParams.magFilter = parameter.textureMagFilter;
}
for (FileHandle image : loadTilesets(root, tmxFile)) {
dependencies.add(new AssetDescriptor(image, Texture.class, texParams));
}
return dependencies;
} catch (IOException e) {
throw new GdxRuntimeException("Couldn't load tilemap '" + fileName + "'", e);
}
}
/** Loads the map data, given the XML root element and an {@link ImageResolver} used to return the tileset Textures
* @param root the XML root element
* @param tmxFile the Filehandle of the tmx file
* @param imageResolver the {@link ImageResolver}
* @return the {@link TiledMap} */
protected TiledMap loadTilemap (Element root, FileHandle tmxFile, ImageResolver imageResolver) {
TiledMap map = new TiledMap();
String mapOrientation = root.getAttribute("orientation", null);
int mapWidth = root.getIntAttribute("width", 0);
int mapHeight = root.getIntAttribute("height", 0);
int tileWidth = root.getIntAttribute("tilewidth", 0);
int tileHeight = root.getIntAttribute("tileheight", 0);
String mapBackgroundColor = root.getAttribute("backgroundcolor", null);
MapProperties mapProperties = map.getProperties();
if (mapOrientation != null) {
mapProperties.put("orientation", mapOrientation);
}
mapProperties.put("width", mapWidth);
mapProperties.put("height", mapHeight);
mapProperties.put("tilewidth", tileWidth);
mapProperties.put("tileheight", tileHeight);
if (mapBackgroundColor != null) {
mapProperties.put("backgroundcolor", mapBackgroundColor);
}
mapWidthInPixels = mapWidth * tileWidth;
mapHeightInPixels = mapHeight * tileHeight;
Element properties = root.getChildByName("properties");
if (properties != null) {
loadProperties(map.getProperties(), properties);
}
Array<Element> tilesets = root.getChildrenByName("tileset");
for (Element element : tilesets) {
loadTileSet(map, element, tmxFile, imageResolver);
root.removeChild(element);
}
for (int i = 0, j = root.getChildCount(); i < j; i++) {
Element element = root.getChild(i);
String name = element.getName();
if (name.equals("layer")) {
loadTileLayer(map, element);
} else if (name.equals("objectgroup")) {
loadObjectGroup(map, element);
}
}
return map;
}
/** Loads the tilesets
* @param root the root XML element
* @return a list of filenames for images containing tiles
* @throws IOException */
protected Array<FileHandle> loadTilesets (Element root, FileHandle tmxFile) throws IOException {
Array<FileHandle> images = new Array<FileHandle>();
for (Element tileset : root.getChildrenByName("tileset")) {
String source = tileset.getAttribute("source", null);
FileHandle image = null;
if (source != null) {
FileHandle tsx = getRelativeFileHandle(tmxFile, source);
tileset = xml.parse(tsx);
String imageSource = tileset.getChildByName("image").getAttribute("source");
image = getRelativeFileHandle(tsx, imageSource);
} else {
String imageSource = tileset.getChildByName("image").getAttribute("source");
image = getRelativeFileHandle(tmxFile, imageSource);
}
images.add(image);
}
return images;
}
/** Loads the specified tileset data, adding it to the collection of the specified map, given the XML element, the tmxFile and
* an {@link ImageResolver} used to retrieve the tileset Textures.
*
* <p>
* Default tileset's property keys that are loaded by default are:
* </p>
*
* <ul>
* <li><em>firstgid</em>, (int, defaults to 1) the first valid global id used for tile numbering</li>
* <li><em>imagesource</em>, (String, defaults to empty string) the tileset source image filename</li>
* <li><em>imagewidth</em>, (int, defaults to 0) the tileset source image width</li>
* <li><em>imageheight</em>, (int, defaults to 0) the tileset source image height</li>
* <li><em>tilewidth</em>, (int, defaults to 0) the tile width</li>
* <li><em>tileheight</em>, (int, defaults to 0) the tile height</li>
* <li><em>margin</em>, (int, defaults to 0) the tileset margin</li>
* <li><em>spacing</em>, (int, defaults to 0) the tileset spacing</li>
* </ul>
*
* <p>
* The values are extracted from the specified Tmx file, if a value can't be found then the default is used.
* </p>
* @param map the Map whose tilesets collection will be populated
* @param element the XML element identifying the tileset to load
* @param tmxFile the Filehandle of the tmx file
* @param imageResolver the {@link ImageResolver} */
protected void loadTileSet (TiledMap map, Element element, FileHandle tmxFile, ImageResolver imageResolver) {
if (element.getName().equals("tileset")) {
String name = element.get("name", null);
int firstgid = element.getIntAttribute("firstgid", 1);
int tilewidth = element.getIntAttribute("tilewidth", 0);
int tileheight = element.getIntAttribute("tileheight", 0);
int spacing = element.getIntAttribute("spacing", 0);
int margin = element.getIntAttribute("margin", 0);
String source = element.getAttribute("source", null);
String imageSource = "";
int imageWidth = 0, imageHeight = 0;
FileHandle image = null;
if (source != null) {
FileHandle tsx = getRelativeFileHandle(tmxFile, source);
try {
element = xml.parse(tsx);
name = element.get("name", null);
tilewidth = element.getIntAttribute("tilewidth", 0);
tileheight = element.getIntAttribute("tileheight", 0);
spacing = element.getIntAttribute("spacing", 0);
margin = element.getIntAttribute("margin", 0);
imageSource = element.getChildByName("image").getAttribute("source");
imageWidth = element.getChildByName("image").getIntAttribute("width", 0);
imageHeight = element.getChildByName("image").getIntAttribute("height", 0);
image = getRelativeFileHandle(tsx, imageSource);
} catch (IOException e) {
throw new GdxRuntimeException("Error parsing external tileset.");
}
} else {
imageSource = element.getChildByName("image").getAttribute("source");
imageWidth = element.getChildByName("image").getIntAttribute("width", 0);
imageHeight = element.getChildByName("image").getIntAttribute("height", 0);
image = getRelativeFileHandle(tmxFile, imageSource);
}
TextureRegion texture = imageResolver.getImage(image.path());
TiledMapTileSet tileset = new TiledMapTileSet();
MapProperties props = tileset.getProperties();
tileset.setName(name);
props.put("firstgid", firstgid);
props.put("imagesource", imageSource);
props.put("imagewidth", imageWidth);
props.put("imageheight", imageHeight);
props.put("tilewidth", tilewidth);
props.put("tileheight", tileheight);
props.put("margin", margin);
props.put("spacing", spacing);
int stopWidth = texture.getRegionWidth() - tilewidth;
int stopHeight = texture.getRegionHeight() - tileheight;
int id = firstgid;
for (int y = margin; y <= stopHeight; y += tileheight + spacing) {
for (int x = margin; x <= stopWidth; x += tilewidth + spacing) {
TextureRegion tileRegion = new TextureRegion(texture, x, y, tilewidth, tileheight);
if (!yUp) {
tileRegion.flip(false, true);
}
TiledMapTile tile = new StaticTiledMapTile(tileRegion);
tile.setId(id);
tileset.putTile(id++, tile);
}
}
Array<Element> tileElements = element.getChildrenByName("tile");
for (Element tileElement : tileElements) {
int localtid = tileElement.getIntAttribute("id", 0);
TiledMapTile tile = tileset.getTile(firstgid + localtid);
if (tile != null) {
String terrain = tileElement.getAttribute("terrain", null);
if (terrain != null) {
tile.getProperties().put("terrain", terrain);
}
String probability = tileElement.getAttribute("probability", null);
if (probability != null) {
tile.getProperties().put("probability", probability);
}
Element properties = tileElement.getChildByName("properties");
if (properties != null) {
loadProperties(tile.getProperties(), properties);
}
}
}
Element properties = element.getChildByName("properties");
if (properties != null) {
loadProperties(tileset.getProperties(), properties);
}
map.getTileSets().addTileSet(tileset);
}
}
/** Load one layer (a 'layer' tag).
* @param map
* @param element */
protected void loadTileLayer (TiledMap map, Element element) {
if (element.getName().equals("layer")) {
String name = element.getAttribute("name", null);
int width = element.getIntAttribute("width", 0);
int height = element.getIntAttribute("height", 0);
int tileWidth = element.getParent().getIntAttribute("tilewidth", 0);
int tileHeight = element.getParent().getIntAttribute("tileheight", 0);
boolean visible = element.getIntAttribute("visible", 1) == 1;
float opacity = element.getFloatAttribute("opacity", 1.0f);
TiledMapTileLayer layer = new TiledMapTileLayer(width, height, tileWidth, tileHeight);
layer.setVisible(visible);
layer.setOpacity(opacity);
layer.setName(name);
TiledMapTileSets tilesets = map.getTileSets();
Element data = element.getChildByName("data");
String encoding = data.getAttribute("encoding", null);
String compression = data.getAttribute("compression", null);
if (encoding == null) { // no 'encoding' attribute means that the encoding is XML
throw new GdxRuntimeException("Unsupported encoding (XML) for TMX Layer Data");
}
if (encoding.equals("csv")) {
String[] array = data.getText().split(",");
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
int id = (int)Long.parseLong(array[y * width + x].trim());
final boolean flipHorizontally = ((id & FLAG_FLIP_HORIZONTALLY) != 0);
final boolean flipVertically = ((id & FLAG_FLIP_VERTICALLY) != 0);
final boolean flipDiagonally = ((id & FLAG_FLIP_DIAGONALLY) != 0);
id = id & ~MASK_CLEAR;
tilesets.getTile(id);
TiledMapTile tile = tilesets.getTile(id);
if (tile != null) {
Cell cell = createTileLayerCell(flipHorizontally, flipVertically, flipDiagonally);
cell.setTile(tile);
layer.setCell(x, yUp ? height - 1 - y : y, cell);
}
}
}
} else {
if (encoding.equals("base64")) {
byte[] bytes = Base64Coder.decode(data.getText());
if (compression == null) {
int read = 0;
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
int id = unsignedByteToInt(bytes[read++]) | unsignedByteToInt(bytes[read++]) << 8
| unsignedByteToInt(bytes[read++]) << 16 | unsignedByteToInt(bytes[read++]) << 24;
final boolean flipHorizontally = ((id & FLAG_FLIP_HORIZONTALLY) != 0);
final boolean flipVertically = ((id & FLAG_FLIP_VERTICALLY) != 0);
final boolean flipDiagonally = ((id & FLAG_FLIP_DIAGONALLY) != 0);
id = id & ~MASK_CLEAR;
tilesets.getTile(id);
TiledMapTile tile = tilesets.getTile(id);
if (tile != null) {
Cell cell = createTileLayerCell(flipHorizontally, flipVertically, flipDiagonally);
cell.setTile(tile);
layer.setCell(x, yUp ? height - 1 - y : y, cell);
}
}
}
} else if (compression.equals("gzip")) {
GZIPInputStream GZIS = null;
try {
GZIS = new GZIPInputStream(new ByteArrayInputStream(bytes), bytes.length);
} catch (IOException e) {
throw new GdxRuntimeException("Error Reading TMX Layer Data - IOException: " + e.getMessage());
}
byte[] temp = new byte[4];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
try {
GZIS.read(temp, 0, 4);
int id = unsignedByteToInt(temp[0]) | unsignedByteToInt(temp[1]) << 8
| unsignedByteToInt(temp[2]) << 16 | unsignedByteToInt(temp[3]) << 24;
final boolean flipHorizontally = ((id & FLAG_FLIP_HORIZONTALLY) != 0);
final boolean flipVertically = ((id & FLAG_FLIP_VERTICALLY) != 0);
final boolean flipDiagonally = ((id & FLAG_FLIP_DIAGONALLY) != 0);
id = id & ~MASK_CLEAR;
tilesets.getTile(id);
TiledMapTile tile = tilesets.getTile(id);
if (tile != null) {
Cell cell = createTileLayerCell(flipHorizontally, flipVertically, flipDiagonally);
cell.setTile(tile);
layer.setCell(x, yUp ? height - 1 - y : y, cell);
}
} catch (IOException e) {
throw new GdxRuntimeException("Error Reading TMX Layer Data.", e);
}
}
}
} else if (compression.equals("zlib")) {
Inflater zlib = new Inflater();
byte[] temp = new byte[4];
zlib.setInput(bytes, 0, bytes.length);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
try {
zlib.inflate(temp, 0, 4);
int id = unsignedByteToInt(temp[0]) | unsignedByteToInt(temp[1]) << 8
| unsignedByteToInt(temp[2]) << 16 | unsignedByteToInt(temp[3]) << 24;
final boolean flipHorizontally = ((id & FLAG_FLIP_HORIZONTALLY) != 0);
final boolean flipVertically = ((id & FLAG_FLIP_VERTICALLY) != 0);
final boolean flipDiagonally = ((id & FLAG_FLIP_DIAGONALLY) != 0);
id = id & ~MASK_CLEAR;
tilesets.getTile(id);
TiledMapTile tile = tilesets.getTile(id);
if (tile != null) {
Cell cell = createTileLayerCell(flipHorizontally, flipVertically, flipDiagonally);
cell.setTile(tile);
layer.setCell(x, yUp ? height - 1 - y : y, cell);
}
} catch (DataFormatException e) {
throw new GdxRuntimeException("Error Reading TMX Layer Data.", e);
}
}
}
}
} else {
// any other value of 'encoding' is one we're not aware of, probably a feature of a future version of Tiled
throw new GdxRuntimeException("Unrecognised encoding (" + encoding + ") for TMX Layer Data");
}
}
Element properties = element.getChildByName("properties");
if (properties != null) {
loadProperties(layer.getProperties(), properties);
}
map.getLayers().add(layer);
}
}
protected void loadObjectGroup (TiledMap map, Element element) {
if (element.getName().equals("objectgroup")) {
String name = element.getAttribute("name", null);
MapLayer layer = new MapLayer();
layer.setName(name);
Element properties = element.getChildByName("properties");
if (properties != null) {
loadProperties(layer.getProperties(), properties);
}
for (Element objectElement : element.getChildrenByName("object")) {
loadObject(layer, objectElement);
}
map.getLayers().add(layer);
}
}
protected void loadObject (MapLayer layer, Element element) {
if (element.getName().equals("object")) {
MapObject object = null;
int x = element.getIntAttribute("x", 0);
int y = (yUp ? mapHeightInPixels - element.getIntAttribute("y", 0) : element.getIntAttribute("y", 0));
int width = element.getIntAttribute("width", 0);
int height = element.getIntAttribute("height", 0);
if (element.getChildCount() > 0) {
Element child = null;
if ((child = element.getChildByName("polygon")) != null) {
String[] points = child.getAttribute("points").split(" ");
float[] vertices = new float[points.length * 2];
for (int i = 0; i < points.length; i++) {
String[] point = points[i].split(",");
vertices[i * 2] = Integer.parseInt(point[0]);
vertices[i * 2 + 1] = Integer.parseInt(point[1]);
if (yUp) {
vertices[i * 2 + 1] *= -1;
}
}
Polygon polygon = new Polygon(vertices);
polygon.setPosition(x, y);
object = new PolygonMapObject(polygon);
} else if ((child = element.getChildByName("polyline")) != null) {
String[] points = child.getAttribute("points").split(" ");
float[] vertices = new float[points.length * 2];
for (int i = 0; i < points.length; i++) {
String[] point = points[i].split(",");
vertices[i * 2] = Integer.parseInt(point[0]);
vertices[i * 2 + 1] = Integer.parseInt(point[1]);
if (yUp) {
vertices[i * 2 + 1] *= -1;
}
}
Polyline polyline = new Polyline(vertices);
polyline.setPosition(x, y);
object = new PolylineMapObject(polyline);
} else if ((child = element.getChildByName("ellipse")) != null) {
object = new EllipseMapObject(x, yUp ? y - height : y, width, height);
}
}
if (object == null) {
object = new RectangleMapObject(x, yUp ? y - height : y, width, height);
}
object.setName(element.getAttribute("name", null));
String type = element.getAttribute("type", null);
if (type != null) {
object.getProperties().put("type", type);
}
int gid = element.getIntAttribute("gid", -1);
if (gid != -1) {
object.getProperties().put("gid", gid);
}
object.getProperties().put("x", x);
object.getProperties().put("y", yUp ? y - height : y);
object.setVisible(element.getIntAttribute("visible", 1) == 1);
Element properties = element.getChildByName("properties");
if (properties != null) {
loadProperties(object.getProperties(), properties);
}
layer.getObjects().add(object);
}
}
protected void loadProperties (MapProperties properties, Element element) {
if (element.getName().equals("properties")) {
for (Element property : element.getChildrenByName("property")) {
String name = property.getAttribute("name", null);
String value = property.getAttribute("value", null);
if (value == null) {
value = property.getText();
}
properties.put(name, value);
}
}
}
protected Cell createTileLayerCell (boolean flipHorizontally, boolean flipVertically, boolean flipDiagonally) {
Cell cell = new Cell();
if (flipDiagonally) {
if (flipHorizontally && flipVertically) {
cell.setFlipHorizontally(true);
cell.setRotation(yUp ? Cell.ROTATE_270 : Cell.ROTATE_90);
} else if (flipHorizontally) {
cell.setRotation(yUp ? Cell.ROTATE_270 : Cell.ROTATE_90);
} else if (flipVertically) {
cell.setRotation(yUp ? Cell.ROTATE_90 : Cell.ROTATE_270);
} else {
cell.setFlipVertically(true);
cell.setRotation(yUp ? Cell.ROTATE_270 : Cell.ROTATE_90);
}
} else {
cell.setFlipHorizontally(flipHorizontally);
cell.setFlipVertically(flipVertically);
}
return cell;
}
protected static FileHandle getRelativeFileHandle (FileHandle file, String path) {
StringTokenizer tokenizer = new StringTokenizer(path, "\\/");
FileHandle result = file.parent();
while (tokenizer.hasMoreElements()) {
String token = tokenizer.nextToken();
if (token.equals(".."))
result = result.parent();
else {
result = result.child(token);
}
}
return result;
}
protected static int unsignedByteToInt (byte b) {
return (int)b & 0xFF;
}
}