/**
* Creates a returns a temporary local file/directory with the same extension as the specified
* file/directory (guaranteed), and the same filename as much as possible (best effort). This
* method returns <code>null</code> if the temporary file/directory could not be created.
*
* @param nonLocalFile the non-local file for which to create a temporary file.
* @return a temporary local file/directory with the same extension as the specified
* file/directory
*/
protected LocalFile createTempLocalFile(AbstractFile nonLocalFile) {
try {
// Note: the returned temporary file may be an AbstractArchiveFile if the filename's extension
// corresponds
// to a registered archive format
LocalFile tempFile =
FileFactory.getTemporaryFile(nonLocalFile.getName(), false).getAncestor(LocalFile.class);
// create a directory
if (nonLocalFile.isDirectory()) {
tempFile.mkdir();
} else { // create a regular file
tempFile.getOutputStream().close();
}
return tempFile;
} catch (IOException e) {
return null;
}
}
public Icon getFileIcon(AbstractFile originalFile, Dimension preferredResolution) {
// Specified file is a LocalFile or a ProxyFile proxying a LocalFile (e.g. an archive file):
// let's simply get
// the icon using #getLocalFileIcon(LocalFile)
AbstractFile topFile = originalFile.getTopAncestor();
Icon icon;
if (topFile instanceof LocalFile) {
icon = getLocalFileIcon((LocalFile) topFile, originalFile, preferredResolution);
}
// File is a remote file: create a temporary local file (or directory) with the same extension
// to grab the icon
// and then delete the file. This operation is I/O bound and thus expensive, so an LRU is used
// to cache
// frequently-accessed file extensions.
else {
// create the temporary, local file
LocalFile tempFile = createTempLocalFile(topFile);
if (tempFile == null) {
// No temp file, no icon!
return null;
}
// Get the file icon
icon = getLocalFileIcon(tempFile, originalFile, preferredResolution);
// Delete the temporary file
try {
tempFile.delete();
} catch (IOException e) {
// Not much to do
}
}
return icon;
}
/**
* Tries to find an existing user Trash folder and returns it. If no existing Trash folder was
* found, creates the standard Xfce user Trash folder and returns it.
*
* @return the user Trash folder, <code>null</code> if no user trash folder could be found or
* created
*/
private static AbstractFile getTrashFolder() {
AbstractFile userHome = LocalFile.getUserHome();
AbstractFile trashDir = userHome.getChildSilently(".local/share/Trash/");
if (isTrashFolder(trashDir)) {
return trashDir;
}
// No existing user trash was found: create the folder, only if it doesn't already exist.
if (!trashDir.exists()) {
try {
trashDir.mkdirs();
trashDir.getChild("info").mkdir();
trashDir.getChild("files").mkdir();
return trashDir;
} catch (IOException e) {
// Will return null
}
}
return null;
}