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- /*
- * 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.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 boolean isEmpty = true;
-
- /**
- * Constructor
- *
- * @param parent the body region this reference area is placed in.
- */
- public MainReference(BodyRegion parent) {
- this.parent = parent;
- addTrait(Trait.IS_REFERENCE_AREA, Boolean.TRUE);
- }
-
- /**
- * Add a span area to this area.
- *
- * @param spanAll whether to make a single-column span
- * @return the created span area.
- */
- public Span createSpan(boolean spanAll) {
- if (spanAreas.size() > 0 && getCurrentSpan().isEmpty()) {
- //Remove the current one if it is empty
- spanAreas.remove(spanAreas.size() - 1);
- }
- 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 true if no child areas have been added yet.
- */
- public boolean isEmpty() {
- if (isEmpty) {
- boolean nonEmptyFound = false;
- if (spanAreas != null) {
- for (Iterator spaniter = spanAreas.iterator(); spaniter.hasNext();) {
- Span spanArea = (Span) spaniter.next();
- nonEmptyFound |= !spanArea.isEmpty();
- }
- }
-
- isEmpty = !nonEmptyFound;
- }
- 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();
- }
-
- }
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