/**
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.karaf.shell.support.completers;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import org.apache.karaf.shell.api.console.Candidate;
import org.apache.karaf.shell.api.console.CommandLine;
import org.apache.karaf.shell.api.console.Completer;
import org.apache.karaf.shell.api.console.Session;
import org.jline.terminal.Terminal;
import org.jline.utils.AttributedStringBuilder;
import org.jline.utils.AttributedStyle;
/**
* <p>A file name completer takes the buffer and issues a list of
* potential completions.</p>
*
* <p>This completer tries to behave as similar as possible to
* <i>bash</i>'s file name completion (using GNU readline)
* with the following exceptions:</p>
*
* <ul>
* <li>Candidates that are directories will end with "/"</li>
* <li>Wildcard regular expressions are not evaluated or replaced</li>
* <li>The "~" character can be used to represent the user's home,
* but it cannot complete to other users' homes, since java does
* not provide any way of determining that easily</li>
* </ul>
*
* @author <a href="mailto:mwp1@cornell.edu">Marc Prud'hommeaux</a>
* @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
* @since 2.3
*/
public class FileCompleter implements Completer
{
private static String OS = System.getProperty("os.name").toLowerCase();
// TODO: Handle files with spaces in them
private static final boolean OS_IS_WINDOWS = isWindows();
public static boolean isWindows() {
return OS.contains("win");
}
public int complete(final Session session, CommandLine commandLine, final List<String> candidates) {
throw new UnsupportedOperationException();
}
public void completeCandidates(final Session session, CommandLine commandLine, final List<Candidate> candidates) {
// buffer can be null
if (candidates == null) {
return;
}
String buffer = commandLine.getCursorArgument().substring(0, commandLine.getArgumentPosition());
if (OS_IS_WINDOWS) {
buffer = buffer.replaceAll("/", File.separator);
}
Terminal terminal = (Terminal) session.get(".jline.terminal");
Path current;
String curBuf;
int lastSep = buffer.lastIndexOf(separator());
if (lastSep >= 0) {
curBuf = buffer.substring(0, lastSep + 1);
if (curBuf.startsWith("~")) {
if (curBuf.startsWith("~" + separator())) {
current = getUserHome().resolve(curBuf.substring(2));
} else {
current = getUserHome().getParent().resolve(curBuf.substring(1));
}
} else {
current = getUserDir().resolve(curBuf);
}
} else {
curBuf = "";
current = getUserDir();
}
try {
Files.newDirectoryStream(current, this::accept).forEach(p -> {
String value = curBuf + p.getFileName().toString();
if (Files.isDirectory(p)) {
String s = OS_IS_WINDOWS ? "\\\\" : "/";
candidates.add(new Candidate(
value + s,
getDisplay(terminal, p),
null, null,
s,
null,
false));
} else {
candidates.add(new Candidate(value, getDisplay(terminal, p),
null, null, null, null, true));
}
});
} catch (IOException e) {
// Ignore
}
}
protected boolean accept(Path path) {
try {
return !Files.isHidden(path);
} catch (IOException e) {
return false;
}
}
protected String separator() {
return File.separator;
}
protected Path getUserDir() {
return Paths.get(System.getProperty("user.dir"));
}
protected Path getUserHome() {
return Paths.get(System.getProperty("user.home"));
}
protected String getDisplay(Terminal terminal, Path p) {
// TODO: use $LS_COLORS for output
String name = p.getFileName().toString();
if (Files.isDirectory(p)) {
AttributedStringBuilder sb = new AttributedStringBuilder();
sb.style(AttributedStyle.BOLD.foreground(AttributedStyle.RED));
sb.append(name);
sb.style(AttributedStyle.DEFAULT);
sb.append(OS_IS_WINDOWS ? "\\\\" : "/");
name = sb.toAnsi(terminal);
} else if (Files.isSymbolicLink(p)) {
AttributedStringBuilder sb = new AttributedStringBuilder();
sb.style(AttributedStyle.BOLD.foreground(AttributedStyle.RED));
sb.append(name);
sb.style(AttributedStyle.DEFAULT);
sb.append("@");
name = sb.toAnsi(terminal);
}
return name;
}
}