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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.layoutmgr;
-
- /**
- * This class is the base class for all kinds of elements that are added to element lists. There
- * are basically two kinds of list elements: Knuth elements and unresolved elements like spaces,
- * border and padding elements which are converted to Knuth elements prior to the breaking
- * process.
- */
- public abstract class ListElement {
-
- private Position position;
-
- /**
- * Main constructor
- * @param position the Position instance needed by the addAreas stage of the LMs.
- */
- public ListElement(Position position) {
- this.position = position;
- }
-
- /**
- * @return the Position instance for this element.
- */
- public Position getPosition() {
- return this.position;
- }
-
- /**
- * Change the Position stored in this element.
- * @param position the Position instance
- */
- public void setPosition(Position position) {
- this.position = position;
- }
-
- /**
- * @return the LayoutManager responsible for this element.
- */
- public LayoutManager getLayoutManager() {
- if (position != null) {
- return position.getLM();
- } else {
- return null;
- }
- }
-
- /** @return true if this element is a KnuthBox. */
- public boolean isBox() {
- return false;
- }
-
- /** @return true if this element is a KnuthGlue. */
- public boolean isGlue() {
- return false;
- }
-
- /** @return true if this element is a KnuthPenalty. */
- public boolean isPenalty() {
- return false;
- }
-
- /** @return true if the element is a penalty and represents a forced break. */
- public boolean isForcedBreak() {
- return false;
- }
-
- /** @return true if the element is an unresolved element such as a space or a border. */
- public boolean isUnresolvedElement() {
- return true;
- }
-
- }
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