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Scala example source code file (FileNameCompleter.java)
The FileNameCompleter.java Scala example source code/* * Copyright (c) 2002-2007, Marc Prud'hommeaux. All rights reserved. * * This software is distributable under the BSD license. See the terms of the * BSD license in the documentation provided with this software. */ package scala.tools.jline.console.completer; import scala.tools.jline.internal.Configuration; import java.io.File; import java.util.List; /** * A file name completer takes the buffer and issues a list of * potential completions. * <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 FileNameCompleter implements Completer { // TODO: Handle files with spaces in them private static final boolean OS_IS_WINDOWS; static { String os = Configuration.getOsName(); OS_IS_WINDOWS = os.contains("windows"); } public int complete(String buffer, final int cursor, final List<CharSequence> candidates) { // buffer can be null assert candidates != null; if (buffer == null) { buffer = ""; } if (OS_IS_WINDOWS) { buffer = buffer.replace('/', '\\'); } String translated = buffer; File homeDir = getUserHome(); // Special character: ~ maps to the user's home directory if (translated.startsWith("~" + separator())) { translated = homeDir.getPath() + translated.substring(1); } else if (translated.startsWith("~")) { translated = homeDir.getParentFile().getAbsolutePath(); } else if (!(translated.startsWith(separator()))) { String cwd = getUserDir().getAbsolutePath(); translated = cwd + separator() + translated; } File file = new File(translated); final File dir; if (translated.endsWith(separator())) { dir = file; } else { dir = file.getParentFile(); } File[] entries = dir == null ? new File[0] : dir.listFiles(); return matchFiles(buffer, translated, entries, candidates); } protected String separator() { return File.separator; } protected File getUserHome() { return Configuration.getUserHome(); } protected File getUserDir() { return new File("."); } protected int matchFiles(final String buffer, final String translated, final File[] files, final List<CharSequence> candidates) { if (files == null) { return -1; } int matches = 0; // first pass: just count the matches for (File file : files) { if (file.getAbsolutePath().startsWith(translated)) { matches++; } } for (File file : files) { if (file.getAbsolutePath().startsWith(translated)) { CharSequence name = file.getName() + (matches == 1 && file.isDirectory() ? separator() : " "); candidates.add(render(file, name).toString()); } } final int index = buffer.lastIndexOf(separator()); return index + separator().length(); } protected CharSequence render(final File file, final CharSequence name) { assert file != null; assert name != null; return name; } } Other Scala source code examplesHere is a short list of links related to this Scala FileNameCompleter.java source code file: |
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