/*******************************************************************************
* 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.backends.gwt;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileFilter;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import com.badlogic.gdx.Files.FileType;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.backends.gwt.preloader.Preloader;
import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.utils.GdxRuntimeException;
public class GwtFileHandle extends FileHandle {
public final Preloader preloader;
private final String file;
private final FileType type;
public GwtFileHandle (Preloader preloader, String fileName, FileType type) {
if (type != FileType.Internal && type != FileType.Classpath)
throw new GdxRuntimeException("FileType '" + type + "' Not supported in GWT backend");
this.preloader = preloader;
this.file = fixSlashes(fileName);
this.type = type;
}
public GwtFileHandle (String path) {
this.type = FileType.Internal;
this.preloader = ((GwtApplication)Gdx.app).getPreloader();
this.file = fixSlashes(path);
}
public String path () {
return file;
}
public String name () {
int index = file.lastIndexOf('/');
if (index < 0) return file;
return file.substring(index + 1);
}
public String extension () {
String name = name();
int dotIndex = name.lastIndexOf('.');
if (dotIndex == -1) return "";
return name.substring(dotIndex + 1);
}
public String nameWithoutExtension () {
String name = name();
int dotIndex = name.lastIndexOf('.');
if (dotIndex == -1) return name;
return name.substring(0, dotIndex);
}
/** @return the path and filename without the extension, e.g. dir/dir2/file.png -> dir/dir2/file */
public String pathWithoutExtension () {
String path = file;
int dotIndex = path.lastIndexOf('.');
if (dotIndex == -1) return path;
return path.substring(0, dotIndex);
}
public FileType type () {
return type;
}
/** Returns a java.io.File that represents this file handle. Note the returned file will only be usable for
* {@link FileType#Absolute} and {@link FileType#External} file handles. */
public File file () {
throw new GdxRuntimeException("Not supported in GWT backend");
}
/** Returns a stream for reading this file as bytes.
* @throw GdxRuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public InputStream read () {
InputStream in = preloader.read(file);
if (in == null) throw new GdxRuntimeException(file + " does not exist");
return in;
}
/** Returns a buffered stream for reading this file as bytes.
* @throw GdxRuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public BufferedInputStream read (int bufferSize) {
return new BufferedInputStream(read(), bufferSize);
}
/** Returns a reader for reading this file as characters.
* @throw GdxRuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public Reader reader () {
return new InputStreamReader(read());
}
/** Returns a reader for reading this file as characters.
* @throw GdxRuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public Reader reader (String charset) {
try {
return new InputStreamReader(read(), charset);
} catch (UnsupportedEncodingException e) {
throw new GdxRuntimeException("Encoding '" + charset + "' not supported", e);
}
}
/** Returns a buffered reader for reading this file as characters.
* @throw GdxRuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public BufferedReader reader (int bufferSize) {
return new BufferedReader(reader(), bufferSize);
}
/** Returns a buffered reader for reading this file as characters.
* @throw GdxRuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public BufferedReader reader (int bufferSize, String charset) {
return new BufferedReader(reader(charset), bufferSize);
}
/** Reads the entire file into a string using the platform's default charset.
* @throw GdxRuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public String readString () {
return readString(null);
}
/** Reads the entire file into a string using the specified charset.
* @throw GdxRuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public String readString (String charset) {
if (preloader.isText(file)) return preloader.texts.get(file);
try {
return new String(readBytes(), "UTF-8");
} catch (UnsupportedEncodingException e) {
return null;
}
}
/** Reads the entire file into a byte array.
* @throw GdxRuntimeException if the file handle represents a directory, doesn't exist, or could not be read. */
public byte[] readBytes () {
int length = (int)length();
if (length == 0) length = 512;
byte[] buffer = new byte[length];
int position = 0;
InputStream input = read();
try {
while (true) {
int count = input.read(buffer, position, buffer.length - position);
if (count == -1) break;
position += count;
if (position == buffer.length) {
// Grow buffer.
byte[] newBuffer = new byte[buffer.length * 2];
System.arraycopy(buffer, 0, newBuffer, 0, position);
buffer = newBuffer;
}
}
} catch (IOException ex) {
throw new GdxRuntimeException("Error reading file: " + this, ex);
} finally {
try {
if (input != null) input.close();
} catch (IOException ignored) {
}
}
if (position < buffer.length) {
// Shrink buffer.
byte[] newBuffer = new byte[position];
System.arraycopy(buffer, 0, newBuffer, 0, position);
buffer = newBuffer;
}
return buffer;
}
/** Reads the entire file into the byte array. The byte array must be big enough to hold the file's data.
* @param bytes the array to load the file into
* @param offset the offset to start writing bytes
* @param size the number of bytes to read, see {@link #length()}
* @return the number of read bytes */
public int readBytes (byte[] bytes, int offset, int size) {
InputStream input = read();
int position = 0;
try {
while (true) {
int count = input.read(bytes, offset + position, size - position);
if (count <= 0) break;
position += count;
}
} catch (IOException ex) {
throw new GdxRuntimeException("Error reading file: " + this, ex);
} finally {
try {
if (input != null) input.close();
} catch (IOException ignored) {
}
}
return position - offset;
}
/** Returns a stream for writing to this file. Parent directories will be created if necessary.
* @param append If false, this file will be overwritten if it exists, otherwise it will be appended.
* @throw GdxRuntimeException if this file handle represents a directory, if it is a {@link FileType#Classpath} or
* {@link FileType#Internal} file, or if it could not be written. */
public OutputStream write (boolean append) {
throw new GdxRuntimeException("Cannot write to files in GWT backend");
}
/** Reads the remaining bytes from the specified stream and writes them to this file. The stream is closed. Parent directories
* will be created if necessary.
* @param append If false, this file will be overwritten if it exists, otherwise it will be appended.
* @throw GdxRuntimeException if this file handle represents a directory, if it is a {@link FileType#Classpath} or
* {@link FileType#Internal} file, or if it could not be written. */
public void write (InputStream input, boolean append) {
throw new GdxRuntimeException("Cannot write to files in GWT backend");
}
/** Returns a writer for writing to this file using the default charset. Parent directories will be created if necessary.
* @param append If false, this file will be overwritten if it exists, otherwise it will be appended.
* @throw GdxRuntimeException if this file handle represents a directory, if it is a {@link FileType#Classpath} or
* {@link FileType#Internal} file, or if it could not be written. */
public Writer writer (boolean append) {
return writer(append, null);
}
/** Returns a writer for writing to this file. Parent directories will be created if necessary.
* @param append If false, this file will be overwritten if it exists, otherwise it will be appended.
* @param charset May be null to use the default charset.
* @throw GdxRuntimeException if this file handle represents a directory, if it is a {@link FileType#Classpath} or
* {@link FileType#Internal} file, or if it could not be written. */
public Writer writer (boolean append, String charset) {
throw new GdxRuntimeException("Cannot write to files in GWT backend");
}
/** Writes the specified string to the file using the default charset. Parent directories will be created if necessary.
* @param append If false, this file will be overwritten if it exists, otherwise it will be appended.
* @throw GdxRuntimeException if this file handle represents a directory, if it is a {@link FileType#Classpath} or
* {@link FileType#Internal} file, or if it could not be written. */
public void writeString (String string, boolean append) {
writeString(string, append, null);
}
/** Writes the specified string to the file as UTF-8. Parent directories will be created if necessary.
* @param append If false, this file will be overwritten if it exists, otherwise it will be appended.
* @param charset May be null to use the default charset.
* @throw GdxRuntimeException if this file handle represents a directory, if it is a {@link FileType#Classpath} or
* {@link FileType#Internal} file, or if it could not be written. */
public void writeString (String string, boolean append, String charset) {
throw new GdxRuntimeException("Cannot write to files in GWT backend");
}
/** Writes the specified bytes to the file. Parent directories will be created if necessary.
* @param append If false, this file will be overwritten if it exists, otherwise it will be appended.
* @throw GdxRuntimeException if this file handle represents a directory, if it is a {@link FileType#Classpath} or
* {@link FileType#Internal} file, or if it could not be written. */
public void writeBytes (byte[] bytes, boolean append) {
throw new GdxRuntimeException("Cannot write to files in GWT backend");
}
/** Writes the specified bytes to the file. Parent directories will be created if necessary.
* @param append If false, this file will be overwritten if it exists, otherwise it will be appended.
* @throw GdxRuntimeException if this file handle represents a directory, if it is a {@link FileType#Classpath} or
* {@link FileType#Internal} file, or if it could not be written. */
public void writeBytes (byte[] bytes, int offset, int length, boolean append) {
throw new GdxRuntimeException("Cannot write to files in GWT backend");
}
/** Returns the paths to the children of this directory. Returns an empty list if this file handle represents a file and not a
* directory. On the desktop, an {@link FileType#Internal} handle to a directory on the classpath will return a zero length
* array.
* @throw GdxRuntimeException if this file is an {@link FileType#Classpath} file. */
public FileHandle[] list () {
return preloader.list(file);
}
/** Returns the paths to the children of this directory that satisfy the specified filter. Returns an empty list if this file
* handle represents a file and not a directory. On the desktop, an {@link FileType#Internal} handle to a directory on the
* classpath will return a zero length array.
* @throw GdxRuntimeException if this file is an {@link FileType#Classpath} file. */
public FileHandle[] list (FileFilter filter) {
return preloader.list(file, filter);
}
/** Returns the paths to the children of this directory that satisfy the specified filter. Returns an empty list if this file
* handle represents a file and not a directory. On the desktop, an {@link FileType#Internal} handle to a directory on the
* classpath will return a zero length array.
* @throw GdxRuntimeException if this file is an {@link FileType#Classpath} file. */
public FileHandle[] list (FilenameFilter filter) {
return preloader.list(file, filter);
}
/** Returns the paths to the children of this directory with the specified suffix. Returns an empty list if this file handle
* represents a file and not a directory. On the desktop, an {@link FileType#Internal} handle to a directory on the classpath
* will return a zero length array.
* @throw GdxRuntimeException if this file is an {@link FileType#Classpath} file. */
public FileHandle[] list (String suffix) {
return preloader.list(file, suffix);
}
/** Returns true if this file is a directory. Always returns false for classpath files. On Android, an {@link FileType#Internal}
* handle to an empty directory will return false. On the desktop, an {@link FileType#Internal} handle to a directory on the
* classpath will return false. */
public boolean isDirectory () {
return preloader.isDirectory(file);
}
/** Returns a handle to the child with the specified name.
* @throw GdxRuntimeException if this file handle is a {@link FileType#Classpath} or {@link FileType#Internal} and the child
* doesn't exist. */
public FileHandle child (String name) {
return new GwtFileHandle(preloader, (file.isEmpty() ? "" : (file + (file.endsWith("/") ? "" : "/"))) + name,
FileType.Internal);
}
public FileHandle parent () {
int index = file.lastIndexOf("/");
String dir = "";
if (index > 0) dir = file.substring(0, index);
return new GwtFileHandle(preloader, dir, type);
}
public FileHandle sibling (String name) {
return parent().child(fixSlashes(name));
}
/** @throw GdxRuntimeException if this file handle is a {@link FileType#Classpath} or {@link FileType#Internal} file. */
public void mkdirs () {
throw new GdxRuntimeException("Cannot mkdirs with an internal file: " + file);
}
/** Returns true if the file exists. On Android, a {@link FileType#Classpath} or {@link FileType#Internal} handle to a directory
* will always return false. */
public boolean exists () {
return preloader.contains(file);
}
/** Deletes this file or empty directory and returns success. Will not delete a directory that has children.
* @throw GdxRuntimeException if this file handle is a {@link FileType#Classpath} or {@link FileType#Internal} file. */
public boolean delete () {
throw new GdxRuntimeException("Cannot delete an internal file: " + file);
}
/** Deletes this file or directory and all children, recursively.
* @throw GdxRuntimeException if this file handle is a {@link FileType#Classpath} or {@link FileType#Internal} file. */
public boolean deleteDirectory () {
throw new GdxRuntimeException("Cannot delete an internal file: " + file);
}
/** Copies this file or directory to the specified file or directory. If this handle is a file, then 1) if the destination is a
* file, it is overwritten, or 2) if the destination is a directory, this file is copied into it, or 3) if the destination
* doesn't exist, {@link #mkdirs()} is called on the destination's parent and this file is copied into it with a new name. If
* this handle is a directory, then 1) if the destination is a file, GdxRuntimeException is thrown, or 2) if the destination is
* a directory, this directory is copied into it recursively, overwriting existing files, or 3) if the destination doesn't
* exist, {@link #mkdirs()} is called on the destination and this directory is copied into it recursively.
* @throw GdxRuntimeException if the destination file handle is a {@link FileType#Classpath} or {@link FileType#Internal} file,
* or copying failed. */
public void copyTo (FileHandle dest) {
throw new GdxRuntimeException("Cannot copy to an internal file: " + dest);
}
/** Moves this file to the specified file, overwriting the file if it already exists.
* @throw GdxRuntimeException if the source or destination file handle is a {@link FileType#Classpath} or
* {@link FileType#Internal} file. */
public void moveTo (FileHandle dest) {
throw new GdxRuntimeException("Cannot move an internal file: " + file);
}
/** Returns the length in bytes of this file, or 0 if this file is a directory, does not exist, or the size cannot otherwise be
* determined. */
public long length () {
return preloader.length(file);
}
/** Returns the last modified time in milliseconds for this file. Zero is returned if the file doesn't exist. Zero is returned
* for {@link FileType#Classpath} files. On Android, zero is returned for {@link FileType#Internal} files. On the desktop, zero
* is returned for {@link FileType#Internal} files on the classpath. */
public long lastModified () {
return 0;
}
public String toString () {
return file;
}
private static String fixSlashes(String path) {
path = path.replace('\\', '/');
if (path.endsWith("/")) {
path = path.substring(0, path.length() - 1);
}
return path;
}
}