/*
* Copyright 2012 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Eclipse Public License version 1.0, available at
* http://www.eclipse.org/legal/epl-v10.html
*/
package org.jboss.forge.shell.completer;
import java.util.ArrayList;
import java.util.List;
import java.util.Queue;
import org.jboss.forge.shell.command.parser.Tokenizer;
import org.jboss.forge.shell.completer.CommandCompleterState;
/**
* Holds state during TAB completion.
*
* @author <a href="mailto:lincolnbaxter@gmail.com">Lincoln Baxter, III</a>
*
*/
public class BaseCommandCompleterState implements CommandCompleterState
{
/*
* Immutable state
*/
private final String buffer;
private final String lastBuffer;
private final int originalIndex;
private final boolean tokenComplete;
/*
* Mutable State
*/
private final Queue<String> tokens;
private final List<String> candidates = new ArrayList<String>();
private int index;
public BaseCommandCompleterState(final String initialBuffer, final String lastBuffer, final int initialIndex)
{
this.buffer = initialBuffer;
this.lastBuffer = lastBuffer;
this.index = initialIndex;
this.originalIndex = initialIndex;
this.tokens = new Tokenizer().tokenize(initialBuffer);
this.tokenComplete = buffer.matches("^.*\\s+$");
}
/*
* Immutable State
*/
@Override
public int getOriginalIndex()
{
return originalIndex;
}
@Override
public Queue<String> getOriginalTokens()
{
return new Tokenizer().tokenize(buffer);
}
@Override
public String getBuffer()
{
return buffer;
}
@Override
public String getLastBuffer()
{
return lastBuffer;
}
@Override
public boolean isFinalTokenComplete()
{
return tokenComplete;
}
/*
* Inquisitors
*/
@Override
public boolean hasSuggestions()
{
return !candidates.isEmpty();
}
/*
* Modifiers
*/
/**
* Set the position where completion candidates should begin.
*/
@Override
public void setIndex(final int newIndex)
{
this.index = newIndex;
}
@Override
public int getIndex()
{
return index;
}
@Override
public Queue<String> getTokens()
{
return tokens;
}
@Override
public List<String> getCandidates()
{
return candidates;
}
public boolean isDuplicateBuffer()
{
return (buffer != null) && buffer.equals(lastBuffer);
}
}