pl.kotcrab.vis.ui.widget.file.FileUtils Maven / Gradle / Ivy

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/*******************************************************************************
 * Copyright 2014 Pawel Pastuszak
 *
 * 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 pl.kotcrab.vis.ui.widget.file;

import java.io.File;
import java.io.IOException;
import java.text.DecimalFormat;
import java.util.Arrays;
import java.util.Comparator;

import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.utils.Array;

public class FileUtils {
	public static final String OS = System.getProperty("os.name").toLowerCase();

	private static final String[] units = new String[] {"B", "KB", "MB", "GB", "TB", "EB"};

	private static final Comparator fileComparator = new Comparator() {
		@Override
		public int compare (FileHandle f1, FileHandle f2) {
			return f1.name().compareTo(f2.name());
		}
	};

	public static String readableFileSize (long size) {
		if (size <= 0) return "0 B";
		int digitGroups = (int)(Math.log10(size) / Math.log10(1024));
		return new DecimalFormat("#,##0.#").format(size / Math.pow(1024, digitGroups)).replace(",", ".") + " " + units[digitGroups];
	}

	public static Array sortFiles (FileHandle[] files) {
		Array directoriesList = new Array();
		Array filesList = new Array();

		Arrays.sort(files, fileComparator);

		for (int i = 0; i < files.length; i++) {
			FileHandle f = files[i];
			if (f.isDirectory())
				directoriesList.add(f);
			else
				filesList.add(f);
		}

		directoriesList.addAll(filesList); // combine lists
		return directoriesList;
	}

	public static boolean isValidFileName (String name) {
		try {
			if (isWindows()) if (name.contains(">") || name.contains("<")) return false;
			return new File(name).getCanonicalFile().getName().equals(name);
		} catch (IOException e) {
			return false;
		}
	}

	public static boolean isWindows () {
		return (OS.indexOf("win") >= 0);
	}

	public static boolean isMac () {
		return (OS.indexOf("mac") >= 0);
	}

	public static boolean isUnix () {
		return (OS.indexOf("nix") >= 0 || OS.indexOf("nux") >= 0 || OS.indexOf("aix") > 0);
	}

}