/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.cli;
import java.util.Collections;
import java.util.List;
import org.jboss.as.cli.impl.CommandCandidatesProvider;
import org.jboss.as.cli.operation.OperationCandidatesProvider;
import org.jboss.as.cli.operation.OperationRequestCompleter;
import org.jboss.as.cli.operation.impl.DefaultCallbackHandler;
/**
* Tab-completer for commands starting with '/'.
*
* @author Alexey Loubyansky
*/
public class CommandCompleter implements CommandLineCompleter {
private final CommandRegistry cmdRegistry;
private final CommandCandidatesProvider cmdProvider;
public CommandCompleter(CommandRegistry cmdRegistry) {
if(cmdRegistry == null)
throw new IllegalArgumentException("Command registry can't be null.");
this.cmdRegistry = cmdRegistry;
this.cmdProvider = new CommandCandidatesProvider(cmdRegistry);
}
@Override
public int complete(CommandContext ctx, String buffer, int cursor, List<String> candidates) {
/* if(cursor != buffer.length()) {
return -1;
}
*/
// support for commands and operations spread across multiple lines
int offset = 0;
if(ctx.getArgumentsString() != null) {
offset = ctx.getArgumentsString().length();
buffer = ctx.getArgumentsString() + buffer;
}
if(buffer.isEmpty()) {
for(String cmd : cmdRegistry.getTabCompletionCommands()) {
CommandHandler handler = cmdRegistry.getCommandHandler(cmd);
if(handler.isAvailable(ctx)) {
candidates.add(cmd);
}
}
Collections.sort(candidates);
return 0;
}
final DefaultCallbackHandler parsedCmd = (DefaultCallbackHandler) ctx.getParsedCommandLine();
try {
parsedCmd.parse(ctx.getCurrentNodePath(), buffer, false);
} catch(CommandFormatException e) {
if(!parsedCmd.endsOnAddressOperationNameSeparator() || !parsedCmd.endsOnSeparator()) {
return -1;
}
}
OperationCandidatesProvider candidatesProvider = cmdProvider;
if(!buffer.isEmpty()) {
int cmdFirstIndex = 0;
while(cmdFirstIndex < buffer.length()) {
final char ch = buffer.charAt(cmdFirstIndex++);
if(!Character.isWhitespace(ch)) {
if(ch == '.' || ch == ':' || ch == '/') {
candidatesProvider = ctx.getOperationCandidatesProvider();
}
break;
}
}
}
int result = OperationRequestCompleter.INSTANCE.complete(ctx, parsedCmd, candidatesProvider, buffer, cursor, candidates);
if(result <= 0) {
return result;
}
return result - offset;
}
}