| /* |
| * 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.fo; |
| |
| import org.apache.fop.fo.properties.CommonBorderPaddingBackground; |
| import org.apache.fop.util.CharUtilities; |
| import java.util.NoSuchElementException; |
| |
| /** |
| * A recursive char iterator that indicates boundaries by returning |
| * an EOT char. |
| */ |
| public class InlineCharIterator extends RecursiveCharIterator { |
| private boolean startBoundary = false; |
| private boolean endBoundary = false; |
| |
| /** |
| * @param fobj the object for whose character contents and for whose |
| * descendant's character contents should be iterated |
| * @param bpb the CommonBorderPaddingBackground properties to be applied |
| */ |
| public InlineCharIterator(FObj fobj, CommonBorderPaddingBackground bpb) { |
| super(fobj); |
| checkBoundaries(bpb); |
| } |
| |
| |
| private void checkBoundaries(CommonBorderPaddingBackground bpb) { |
| /* Current understanding is that an <fo:inline> is always a boundary for |
| * whitespace collapse if it has a border or not |
| startBoundary = (bpb.getBorderStartWidth(false) > 0 |
| || bpb.getPaddingStart(false, null) > 0); // TODO do we need context here? |
| endBoundary = (bpb.getBorderEndWidth(false) > 0 |
| || bpb.getPaddingEnd(false, null) > 0); // TODO do we need context here? |
| */ |
| startBoundary = true; |
| endBoundary = true; |
| } |
| |
| /** |
| * @return true if there are more characters |
| */ |
| public boolean hasNext() { |
| if (startBoundary) { |
| return true; |
| } |
| return (super.hasNext() || endBoundary); |
| /* If super.hasNext() returns false, |
| * we return true if we are going to return a "boundary" signal |
| * else false. |
| */ |
| } |
| |
| /** |
| * @return the next character |
| * @throws NoSuchElementException if there are no more characters |
| */ |
| public char nextChar() throws NoSuchElementException { |
| if (startBoundary) { |
| startBoundary = false; |
| return CharUtilities.CODE_EOT; |
| } |
| try { |
| return super.nextChar(); |
| } catch (NoSuchElementException e) { |
| // Underlying has nothing more to return |
| // Check end boundary char |
| if (endBoundary) { |
| endBoundary = false; |
| return CharUtilities.CODE_EOT; |
| } else { |
| throw e; |
| } |
| } |
| } |
| } |
| |