| /* |
| * 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. |
| */ |
| |
| /* $Id$ */ |
| |
| package org.apache.fop.layoutmgr; |
| |
| import java.util.List; |
| |
| /** |
| * A dedicated {@link PositionIterator} that is backed by an iterator |
| * over a list of {@link KnuthElement}s. |
| */ |
| public class KnuthPossPosIter extends PositionIterator { |
| |
| private int iterCount; |
| |
| /** |
| * Main constructor |
| * @param elementList List of Knuth elements |
| * @param startPos starting position, inclusive |
| * @param endPos ending position, exclusive |
| */ |
| public KnuthPossPosIter(List elementList, int startPos, int endPos) { |
| super(elementList.listIterator(startPos)); |
| iterCount = endPos - startPos; |
| } |
| |
| /** |
| * Auxiliary constructor |
| * @param elementList List of Knuth elements |
| */ |
| public KnuthPossPosIter(List elementList) { |
| this(elementList, 0, elementList.size()); |
| } |
| |
| // Check position < endPos |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected boolean checkNext() { |
| if (iterCount > 0) { |
| return super.checkNext(); |
| } else { |
| endIter(); |
| return false; |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public Position next() { |
| --iterCount; |
| return super.next(); |
| } |
| |
| /** |
| * Peek at next, returning as ListElement. |
| * @return peek at next as ListElement |
| */ |
| public ListElement getKE() { |
| return (ListElement) peekNext(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected LayoutManager getLM(Object nextObj) { |
| return ((ListElement) nextObj).getLayoutManager(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected Position getPos(Object nextObj) { |
| return ((ListElement) nextObj).getPosition(); |
| } |
| } |