| /* |
| * Copyright 1999-2005 The Apache Software Foundation. |
| * |
| * 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. |
| */ |
| |
| /* $Id: MainReference.java,v 1.2 2004/02/27 17:41:26 jeremias Exp $ */ |
| |
| package org.apache.fop.area; |
| |
| import java.util.List; |
| import java.util.Iterator; |
| |
| /** |
| * The main-reference-area generated by an fo:region-body |
| * This object holds one or more span-reference-areas (block-areas |
| * stacked in the block progression direction) |
| * See fo:region-body definition in the XSL Rec for more information. |
| */ |
| public class MainReference extends Area { |
| |
| private BodyRegion parent; |
| private List spanAreas = new java.util.ArrayList(); |
| private int width; |
| private boolean isEmpty = true; |
| |
| /** |
| * Constructor |
| */ |
| public MainReference(BodyRegion parent) { |
| this.parent = parent; |
| addTrait(Trait.IS_REFERENCE_AREA, Boolean.TRUE); |
| } |
| |
| /** |
| * Add a span area to this area. |
| * |
| * @param span the span area to add |
| */ |
| public Span createSpan(boolean spanAll) { |
| RegionViewport rv = parent.getRegionViewport(); |
| int ipdWidth = (int) parent.getIPD() - |
| rv.getBorderAndPaddingWidthStart() - rv.getBorderAndPaddingWidthEnd(); |
| |
| Span newSpan = new Span(((spanAll) ? 1 : getColumnCount()), |
| getColumnGap(), ipdWidth); |
| spanAreas.add(newSpan); |
| return getCurrentSpan(); |
| } |
| |
| /** |
| * Get the span areas from this area. |
| * |
| * @return the list of span areas |
| */ |
| public List getSpans() { |
| return spanAreas; |
| } |
| |
| /** |
| * Get the span area currently being filled (i.e., the last span created) |
| * |
| * @return the active span |
| */ |
| public Span getCurrentSpan() { |
| return (Span) spanAreas.get(spanAreas.size()-1); |
| } |
| |
| /** |
| * indicates whether any child areas have been added to this reference area |
| * this is achieved by looping through each span |
| * |
| * @return |
| */ |
| public boolean isEmpty() { |
| if (isEmpty) { |
| int areaCount = 0; |
| if (spanAreas != null) { |
| for (Iterator spaniter = spanAreas.iterator(); spaniter.hasNext(); ) { |
| Span spanArea = (Span) spaniter.next(); |
| for (int i = 0; i < spanArea.getColumnCount(); i++) { |
| NormalFlow flow = spanArea.getNormalFlow(i); |
| if (flow != null) { |
| if (flow.getChildAreas() != null) { |
| areaCount += flow.getChildAreas().size(); |
| } |
| } |
| } |
| } |
| } |
| |
| isEmpty = (areaCount == 0); |
| } |
| return isEmpty; |
| } |
| |
| /** @return the number of columns */ |
| public int getColumnCount() { |
| return parent.getColumnCount(); |
| } |
| |
| /** @return the column gap in millipoints */ |
| public int getColumnGap() { |
| return parent.getColumnGap(); |
| } |
| |
| /** |
| * Get the width of this reference area. |
| * |
| * @return the width |
| */ |
| public int getWidth() { |
| return width; |
| } |
| |
| } |
| |