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Groovy: A powerful, dynamic language for the JVM
/*
* Copyright 2003-2007 the original author or authors.
*
* Licensed 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.codehaus.groovy.tools.shell.util;
import java.util.List;
import java.util.Iterator;
import java.util.SortedSet;
import groovy.lang.Closure;
/**
* Support for simple completors.
*
* @version $Id: SimpleCompletor.java 7673 2007-08-24 09:39:38Z user57 $
* @author Jason Dillon
*/
public class SimpleCompletor
extends jline.SimpleCompletor
{
public SimpleCompletor(final String[] candidates) {
super(candidates);
}
public SimpleCompletor() {
this(new String[0]);
}
public SimpleCompletor(final Closure loader) {
this();
assert loader != null;
Object obj = loader.call();
List list = null;
if (obj instanceof List) {
list = (List)obj;
}
//
// TODO: Maybe handle arrays too?
//
if (list == null) {
throw new IllegalStateException("The loader closure did not return a list of candicates; found: " + obj);
}
Iterator iter = list.iterator();
while (iter.hasNext()) {
add(String.valueOf(iter.next()));
}
}
public void add(final String candidate) {
addCandidateString(candidate);
}
public Object leftShift(final String s) {
add(s);
return null;
}
//
// NOTE: Duplicated (and augumented) from JLine sources to make it call getCandidates() to make the list more dynamic
//
public int complete(final String buffer, final int cursor, final List clist) {
String start = (buffer == null) ? "" : buffer;
SortedSet matches = getCandidates().tailSet(start);
for (Iterator i = matches.iterator(); i.hasNext();) {
String can = (String) i.next();
if (!(can.startsWith(start))) {
break;
}
String delim = getDelimiter();
if (delim != null) {
int index = can.indexOf(delim, cursor);
if (index != -1) {
can = can.substring(0, index + 1);
}
}
clist.add(can);
}
if (clist.size() == 1) {
clist.set(0, ((String) clist.get(0)) + " ");
}
// the index of the completion is always from the beginning of the buffer.
return (clist.size() == 0) ? (-1) : 0;
}
}