mirror of
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761 lines
24 KiB
Java
761 lines
24 KiB
Java
/*
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* This file is modified by Ivan Maidanski <ivmai@ivmaisoft.com>
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* Project name: JCGO-SUNAWT (http://www.ivmaisoft.com/jcgo/)
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*/
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/*
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* @(#)FileSystemView.java 1.46 04/04/27
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*
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* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
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* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*/
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package javax.swing.filechooser;
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import javax.swing.event.*;
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import javax.swing.*;
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import java.awt.Image;
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import java.io.File;
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import java.io.FileFilter;
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import java.io.FilenameFilter;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.text.MessageFormat;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import java.util.Vector;
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import java.beans.PropertyChangeListener;
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import java.beans.PropertyChangeEvent;
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import java.lang.reflect.*;
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import sun.awt.shell.*;
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/**
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* FileSystemView is JFileChooser's gateway to the
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* file system. Since the JDK1.1 File API doesn't allow
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* access to such information as root partitions, file type
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* information, or hidden file bits, this class is designed
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* to intuit as much OS-specific file system information as
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* possible.
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*
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* <p>
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*
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* Java Licensees may want to provide a different implementation of
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* FileSystemView to better handle a given operating system.
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*
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* @version 1.46 04/27/04
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* @author Jeff Dinkins
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*/
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// PENDING(jeff) - need to provide a specification for
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// how Mac/OS2/BeOS/etc file systems can modify FileSystemView
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// to handle their particular type of file system.
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public abstract class FileSystemView {
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static FileSystemView windowsFileSystemView = null;
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static FileSystemView unixFileSystemView = null;
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//static FileSystemView macFileSystemView = null;
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static FileSystemView genericFileSystemView = null;
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static boolean useSystemExtensionsHiding = false;
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public static FileSystemView getFileSystemView() {
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useSystemExtensionsHiding = UIManager.getDefaults().getBoolean("FileChooser.useSystemExtensionHiding");
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UIManager.addPropertyChangeListener(new PropertyChangeListener() {
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public void propertyChange(PropertyChangeEvent e) {
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if (e.getPropertyName().equals("lookAndFeel")) {
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useSystemExtensionsHiding = UIManager.getDefaults().getBoolean("FileChooser.useSystemExtensionHiding");
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}
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}
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});
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if(File.separatorChar == '\\') {
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if(windowsFileSystemView == null) {
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windowsFileSystemView = new WindowsFileSystemView();
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}
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return windowsFileSystemView;
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}
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if(File.separatorChar == '/') {
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if(unixFileSystemView == null) {
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unixFileSystemView = new UnixFileSystemView();
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}
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return unixFileSystemView;
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}
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// if(File.separatorChar == ':') {
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// if(macFileSystemView == null) {
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// macFileSystemView = new MacFileSystemView();
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// }
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// return macFileSystemView;
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//}
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if(genericFileSystemView == null) {
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genericFileSystemView = new GenericFileSystemView();
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}
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return genericFileSystemView;
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}
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/**
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* Determines if the given file is a root in the navigatable tree(s).
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* Examples: Windows 98 has one root, the Desktop folder. DOS has one root
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* per drive letter, <code>C:\</code>, <code>D:\</code>, etc. Unix has one root,
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* the <code>"/"</code> directory.
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*
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* The default implementation gets information from the <code>ShellFolder</code> class.
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*
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* @param f a <code>File</code> object representing a directory
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* @return <code>true</code> if <code>f</code> is a root in the navigatable tree.
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* @see #isFileSystemRoot
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*/
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public boolean isRoot(File f) {
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if (f == null || !f.isAbsolute()) {
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return false;
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}
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File[] roots = getRoots();
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for (int i = 0; i < roots.length; i++) {
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if (roots[i].equals(f)) {
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return true;
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}
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}
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return false;
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}
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/**
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* Returns true if the file (directory) can be visited.
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* Returns false if the directory cannot be traversed.
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*
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* @param f the <code>File</code>
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* @return <code>true</code> if the file/directory can be traversed, otherwise <code>false</code>
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* @see JFileChooser#isTraversable
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* @see FileView#isTraversable
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*/
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public Boolean isTraversable(File f) {
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return Boolean.valueOf(f.isDirectory());
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}
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/**
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* Name of a file, directory, or folder as it would be displayed in
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* a system file browser. Example from Windows: the "M:\" directory
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* displays as "CD-ROM (M:)"
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*
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* The default implementation gets information from the ShellFolder class.
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*
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* @param f a <code>File</code> object
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* @return the file name as it would be displayed by a native file chooser
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* @see JFileChooser#getName
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*/
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public String getSystemDisplayName(File f) {
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String name = null;
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if (f != null) {
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name = f.getName();
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if (!name.equals("..") && !name.equals(".") &&
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(useSystemExtensionsHiding ||
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!isFileSystem(f) ||
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isFileSystemRoot(f)) &&
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((f instanceof ShellFolder) ||
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f.exists())) {
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name = getShellFolder(f).getDisplayName();
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if (name == null || name.length() == 0) {
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name = f.getPath(); // e.g. "/"
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}
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}
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}
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return name;
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}
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/**
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* Type description for a file, directory, or folder as it would be displayed in
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* a system file browser. Example from Windows: the "Desktop" folder
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* is desribed as "Desktop".
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*
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* Override for platforms with native ShellFolder implementations.
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*
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* @param f a <code>File</code> object
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* @return the file type description as it would be displayed by a native file chooser
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* or null if no native information is available.
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* @see JFileChooser#getTypeDescription
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*/
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public String getSystemTypeDescription(File f) {
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return null;
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}
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/**
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* Icon for a file, directory, or folder as it would be displayed in
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* a system file browser. Example from Windows: the "M:\" directory
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* displays a CD-ROM icon.
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*
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* The default implementation gets information from the ShellFolder class.
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*
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* @param f a <code>File</code> object
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* @return an icon as it would be displayed by a native file chooser
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* @see JFileChooser#getIcon
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*/
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public Icon getSystemIcon(File f) {
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if (f != null) {
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ShellFolder sf = getShellFolder(f);
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Image img = sf.getIcon(false);
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if (img != null) {
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return new ImageIcon(img, sf.getFolderType());
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} else {
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return UIManager.getIcon(f.isDirectory() ? "FileView.directoryIcon" : "FileView.fileIcon");
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}
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} else {
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return null;
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}
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}
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/**
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* On Windows, a file can appear in multiple folders, other than its
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* parent directory in the filesystem. Folder could for example be the
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* "Desktop" folder which is not the same as file.getParentFile().
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*
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* @param folder a <code>File</code> object repesenting a directory or special folder
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* @param file a <code>File</code> object
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* @return <code>true</code> if <code>folder</code> is a directory or special folder and contains <code>file</code>.
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*/
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public boolean isParent(File folder, File file) {
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if (folder == null || file == null) {
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return false;
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} else if (folder instanceof ShellFolder) {
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File parent = file.getParentFile();
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if (parent != null && parent.equals(folder)) {
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return true;
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}
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File[] children = getFiles(folder, false);
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for (int i = 0; i < children.length; i++) {
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if (file.equals(children[i])) {
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return true;
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}
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}
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return false;
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} else {
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return folder.equals(file.getParentFile());
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}
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}
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/**
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*
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* @param parent a <code>File</code> object repesenting a directory or special folder
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* @param fileName a name of a file or folder which exists in <code>parent</code>
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* @return a File object. This is normally constructed with <code>new
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* File(parent, fileName)</code> except when parent and child are both
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* special folders, in which case the <code>File</code> is a wrapper containing
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* a <code>ShellFolder</code> object.
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*/
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public File getChild(File parent, String fileName) {
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if (parent instanceof ShellFolder) {
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File[] children = getFiles(parent, false);
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for (int i = 0; i < children.length; i++) {
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if (children[i].getName().equals(fileName)) {
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return children[i];
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}
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}
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}
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return createFileObject(parent, fileName);
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}
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/**
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* Checks if <code>f</code> represents a real directory or file as opposed to a
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* special folder such as <code>"Desktop"</code>. Used by UI classes to decide if
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* a folder is selectable when doing directory choosing.
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*
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* @param f a <code>File</code> object
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* @return <code>true</code> if <code>f</code> is a real file or directory.
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*/
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public boolean isFileSystem(File f) {
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if (f instanceof ShellFolder) {
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ShellFolder sf = (ShellFolder)f;
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// Shortcuts to directories are treated as not being file system objects,
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// so that they are never returned by JFileChooser.
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return sf.isFileSystem() && !(sf.isLink() && sf.isDirectory());
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} else {
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return true;
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}
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}
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/**
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* Creates a new folder with a default folder name.
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*/
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public abstract File createNewFolder(File containingDir) throws IOException;
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/**
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* Returns whether a file is hidden or not.
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*/
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public boolean isHiddenFile(File f) {
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return f.isHidden();
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}
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/**
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* Is dir the root of a tree in the file system, such as a drive
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* or partition. Example: Returns true for "C:\" on Windows 98.
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*
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* @param f a <code>File</code> object representing a directory
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* @return <code>true</code> if <code>f</code> is a root of a filesystem
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* @see #isRoot
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*/
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public boolean isFileSystemRoot(File dir) {
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return ShellFolder.isFileSystemRoot(dir);
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}
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/**
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* Used by UI classes to decide whether to display a special icon
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* for drives or partitions, e.g. a "hard disk" icon.
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*
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* The default implementation has no way of knowing, so always returns false.
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*
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* @param dir a directory
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* @return <code>false</code> always
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*/
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public boolean isDrive(File dir) {
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return false;
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}
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/**
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* Used by UI classes to decide whether to display a special icon
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* for a floppy disk. Implies isDrive(dir).
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*
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* The default implementation has no way of knowing, so always returns false.
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*
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* @param dir a directory
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* @return <code>false</code> always
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*/
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public boolean isFloppyDrive(File dir) {
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return false;
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}
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/**
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* Used by UI classes to decide whether to display a special icon
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* for a computer node, e.g. "My Computer" or a network server.
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*
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* The default implementation has no way of knowing, so always returns false.
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*
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* @param dir a directory
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* @return <code>false</code> always
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*/
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public boolean isComputerNode(File dir) {
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return ShellFolder.isComputerNode(dir);
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}
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/**
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* Returns all root partitions on this system. For example, on
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* Windows, this would be the "Desktop" folder, while on DOS this
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* would be the A: through Z: drives.
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*/
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public File[] getRoots() {
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// Don't cache this array, because filesystem might change
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File[] roots = (File[])ShellFolder.get("roots");
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for (int i = 0; i < roots.length; i++) {
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if (isFileSystemRoot(roots[i])) {
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roots[i] = createFileSystemRoot(roots[i]);
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}
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}
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return roots;
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}
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// Providing default implementations for the remaining methods
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// because most OS file systems will likely be able to use this
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// code. If a given OS can't, override these methods in its
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// implementation.
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public File getHomeDirectory() {
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return createFileObject(System.getProperty("user.home"));
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}
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/**
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* Return the user's default starting directory for the file chooser.
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*
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* @return a <code>File</code> object representing the default
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* starting folder
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*/
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public File getDefaultDirectory() {
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File f = (File)ShellFolder.get("fileChooserDefaultFolder");
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if (isFileSystemRoot(f)) {
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f = createFileSystemRoot(f);
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}
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return f;
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}
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/**
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* Returns a File object constructed in dir from the given filename.
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*/
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public File createFileObject(File dir, String filename) {
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if(dir == null) {
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return new File(filename);
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} else {
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return new File(dir, filename);
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}
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}
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/**
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* Returns a File object constructed from the given path string.
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*/
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public File createFileObject(String path) {
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File f = new File(path);
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if (isFileSystemRoot(f)) {
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f = createFileSystemRoot(f);
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}
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return f;
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}
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/**
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* Gets the list of shown (i.e. not hidden) files.
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*/
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public File[] getFiles(File dir, boolean useFileHiding) {
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Vector files = new Vector();
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// add all files in dir
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File[] names;
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if (!(dir instanceof ShellFolder)) {
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dir = getShellFolder(dir);
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}
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names = ((ShellFolder)dir).listFiles(!useFileHiding);
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File f;
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int nameCount = (names == null) ? 0 : names.length;
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for (int i = 0; i < nameCount; i++) {
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if (Thread.currentThread().isInterrupted()) {
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break;
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}
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f = names[i];
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if (!(f instanceof ShellFolder)) {
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if (isFileSystemRoot(f)) {
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f = createFileSystemRoot(f);
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}
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try {
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f = ShellFolder.getShellFolder(f);
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} catch (FileNotFoundException e) {
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// Not a valid file (wouldn't show in native file chooser)
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// Example: C:\pagefile.sys
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continue;
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} catch (InternalError e) {
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// Not a valid file (wouldn't show in native file chooser)
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// Example C:\Winnt\Profiles\joe\history\History.IE5
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continue;
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}
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}
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if (!useFileHiding || !isHiddenFile(f)) {
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files.addElement(f);
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}
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}
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return (File[])files.toArray(new File[files.size()]);
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}
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/**
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* Returns the parent directory of <code>dir</code>.
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* @param dir the <code>File</code> being queried
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* @return the parent directory of <code>dir</code>, or
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* <code>null</code> if <code>dir</code> is <code>null</code>
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*/
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public File getParentDirectory(File dir) {
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if (dir != null && dir.exists()) {
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ShellFolder sf = getShellFolder(dir);
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File psf = sf.getParentFile();
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if (psf != null) {
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if (isFileSystem(psf)) {
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File f = psf;
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if (f != null && !f.exists()) {
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// This could be a node under "Network Neighborhood".
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File ppsf = psf.getParentFile();
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if (ppsf == null || !isFileSystem(ppsf)) {
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// We're mostly after the exists() override for windows below.
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f = createFileSystemRoot(f);
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}
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}
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return f;
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} else {
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return psf;
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}
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}
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}
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return null;
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}
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ShellFolder getShellFolder(File f) {
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if (!(f instanceof ShellFolder)
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&& !(f instanceof FileSystemRoot)
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&& isFileSystemRoot(f)) {
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f = createFileSystemRoot(f);
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}
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try {
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return ShellFolder.getShellFolder(f);
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} catch (FileNotFoundException e) {
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System.err.println("FileSystemView.getShellFolder: f="+f);
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e.printStackTrace();
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return null;
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} catch (InternalError e) {
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System.err.println("FileSystemView.getShellFolder: f="+f);
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e.printStackTrace();
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return null;
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}
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}
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/**
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* Creates a new <code>File</code> object for <code>f</code> with correct
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* behavior for a file system root directory.
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*
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* @param f a <code>File</code> object representing a file system root
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* directory, for example "/" on Unix or "C:\" on Windows.
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* @return a new <code>File</code> object
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*/
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protected File createFileSystemRoot(File f) {
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return new FileSystemRoot(f);
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}
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static class FileSystemRoot extends File {
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public FileSystemRoot(File f) {
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super(f,"");
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}
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public FileSystemRoot(String s) {
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super(s);
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}
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public boolean isDirectory() {
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return true;
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}
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public String getName() {
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return getPath();
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}
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}
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}
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/**
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* FileSystemView that handles some specific unix-isms.
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*/
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class UnixFileSystemView extends FileSystemView {
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private static String newFolderString;
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|
private static String newFolderNextString;
|
|
|
|
/**
|
|
* Creates a new folder with a default folder name.
|
|
*/
|
|
public File createNewFolder(File containingDir) throws IOException {
|
|
if(containingDir == null) {
|
|
throw new IOException("Containing directory is null");
|
|
}
|
|
if (newFolderString == null)
|
|
newFolderString = UIManager.getString("FileChooser.other.newFolder");
|
|
if (newFolderNextString == null)
|
|
newFolderNextString =
|
|
UIManager.getString("FileChooser.other.newFolder.subsequent");
|
|
// Unix - using OpenWindows' default folder name. Can't find one for Motif/CDE.
|
|
File newFolder = createFileObject(containingDir, newFolderString);
|
|
int i = 1;
|
|
while (newFolder.exists() && (i < 100)) {
|
|
newFolder = createFileObject(containingDir, MessageFormat.format(
|
|
newFolderNextString, new Object[] { new Integer(i) }));
|
|
i++;
|
|
}
|
|
|
|
if(newFolder.exists()) {
|
|
throw new IOException("Directory already exists: " + newFolder.getAbsolutePath());
|
|
} else {
|
|
newFolder.mkdirs();
|
|
}
|
|
|
|
return newFolder;
|
|
}
|
|
|
|
public boolean isFileSystemRoot(File dir) {
|
|
return (dir != null && dir.getAbsolutePath().equals("/"));
|
|
}
|
|
|
|
public boolean isDrive(File dir) {
|
|
if (isFloppyDrive(dir)) {
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public boolean isFloppyDrive(File dir) {
|
|
// Could be looking at the path for Solaris, but wouldn't be reliable.
|
|
// For example:
|
|
// return (dir != null && dir.getAbsolutePath().toLowerCase().startsWith("/floppy"));
|
|
return false;
|
|
}
|
|
|
|
public boolean isComputerNode(File dir) {
|
|
if (dir != null) {
|
|
String parent = dir.getParent();
|
|
if (parent != null && parent.equals("/net")) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* FileSystemView that handles some specific windows concepts.
|
|
*/
|
|
class WindowsFileSystemView extends FileSystemView {
|
|
|
|
private static String newFolderString;
|
|
private static String newFolderNextString;
|
|
|
|
public Boolean isTraversable(File f) {
|
|
return Boolean.valueOf(isFileSystemRoot(f) || isComputerNode(f) || f.isDirectory());
|
|
}
|
|
|
|
public File getChild(File parent, String fileName) {
|
|
if (fileName.startsWith("\\")
|
|
&& !(fileName.startsWith("\\\\"))
|
|
&& isFileSystem(parent)) {
|
|
|
|
//Path is relative to the root of parent's drive
|
|
String path = parent.getAbsolutePath();
|
|
if (path.length() >= 2
|
|
&& path.charAt(1) == ':'
|
|
&& Character.isLetter(path.charAt(0))) {
|
|
|
|
return createFileObject(path.substring(0, 2) + fileName);
|
|
}
|
|
}
|
|
return super.getChild(parent, fileName);
|
|
}
|
|
|
|
/**
|
|
* Type description for a file, directory, or folder as it would be displayed in
|
|
* a system file browser. Example from Windows: the "Desktop" folder
|
|
* is desribed as "Desktop".
|
|
*
|
|
* The Windows implementation gets information from the ShellFolder class.
|
|
*/
|
|
public String getSystemTypeDescription(File f) {
|
|
if (f != null) {
|
|
return getShellFolder(f).getFolderType();
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return the Desktop folder.
|
|
*/
|
|
public File getHomeDirectory() {
|
|
return getRoots()[0];
|
|
}
|
|
|
|
/**
|
|
* Creates a new folder with a default folder name.
|
|
*/
|
|
public File createNewFolder(File containingDir) throws IOException {
|
|
if(containingDir == null) {
|
|
throw new IOException("Containing directory is null");
|
|
}
|
|
if (newFolderString == null)
|
|
newFolderString = UIManager.getString("FileChooser.win32.newFolder");
|
|
if (newFolderNextString == null)
|
|
newFolderNextString =
|
|
UIManager.getString("FileChooser.win32.newFolder.subsequent");
|
|
// Using NT's default folder name
|
|
File newFolder = createFileObject(containingDir, newFolderString);
|
|
int i = 2;
|
|
while (newFolder.exists() && (i < 100)) {
|
|
newFolder = createFileObject(containingDir, MessageFormat.format(
|
|
newFolderNextString, new Object[] { new Integer(i) }));
|
|
i++;
|
|
}
|
|
|
|
if(newFolder.exists()) {
|
|
throw new IOException("Directory already exists: " + newFolder.getAbsolutePath());
|
|
} else {
|
|
newFolder.mkdirs();
|
|
}
|
|
|
|
return newFolder;
|
|
}
|
|
|
|
public boolean isDrive(File dir) {
|
|
return isFileSystemRoot(dir);
|
|
}
|
|
|
|
public boolean isFloppyDrive(File dir) {
|
|
String path = dir.getAbsolutePath();
|
|
return (path != null && (path.equals("A:\\") || path.equals("B:\\")));
|
|
}
|
|
|
|
/**
|
|
* Returns a File object constructed from the given path string.
|
|
*/
|
|
public File createFileObject(String path) {
|
|
// Check for missing backslash after drive letter such as "C:" or "C:filename"
|
|
if (path.length() >= 2 && path.charAt(1) == ':' && Character.isLetter(path.charAt(0))) {
|
|
if (path.length() == 2) {
|
|
path += "\\";
|
|
} else if (path.charAt(2) != '\\') {
|
|
path = path.substring(0, 2) + "\\" + path.substring(2);
|
|
}
|
|
}
|
|
return super.createFileObject(path);
|
|
}
|
|
|
|
protected File createFileSystemRoot(File f) {
|
|
// Problem: Removable drives on Windows return false on f.exists()
|
|
// Workaround: Override exists() to always return true.
|
|
return new FileSystemRoot(f) {
|
|
public boolean exists() {
|
|
return true;
|
|
}
|
|
};
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Fallthrough FileSystemView in case we can't determine the OS.
|
|
*/
|
|
class GenericFileSystemView extends FileSystemView {
|
|
|
|
private static String newFolderString;
|
|
|
|
/**
|
|
* Creates a new folder with a default folder name.
|
|
*/
|
|
public File createNewFolder(File containingDir) throws IOException {
|
|
if(containingDir == null) {
|
|
throw new IOException("Containing directory is null");
|
|
}
|
|
if (newFolderString == null)
|
|
newFolderString = UIManager.getString("FileChooser.other.newFolder");
|
|
// Using NT's default folder name
|
|
File newFolder = createFileObject(containingDir, newFolderString);
|
|
|
|
if(newFolder.exists()) {
|
|
throw new IOException("Directory already exists: " + newFolder.getAbsolutePath());
|
|
} else {
|
|
newFolder.mkdirs();
|
|
}
|
|
|
|
return newFolder;
|
|
}
|
|
|
|
}
|