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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;
/** A position. */
public class Position {
private LayoutManager layoutManager;
private int index = -1;
/**
* Construct a position.
* @param lm the associated layout manager
*/
public Position(LayoutManager lm) {
layoutManager = lm;
}
/**
* Construct a position.
* @param lm the associated layout manager
* @param index the index
*/
public Position(LayoutManager lm, int index) {
this(lm);
setIndex(index);
}
/** @return associated layout manager */
public LayoutManager getLM() {
return layoutManager;
}
/**
* @param depth the depth at which the LM in this position is found
* @return associated layout manager
*/
public LayoutManager getLM(int depth) {
Position subPos = getPosition(depth);
if (subPos == null) {
return null;
} else {
return subPos.getLM();
}
}
/**
* Overridden by NonLeafPosition to return the Position of its child LM.
* @return a position or null
*/
public Position getPosition() {
return null;
}
/**
* Overridden by NonLeafPosition to return the Position of its child LM.
* @param depth the depth at which the position in this position is found
* @return a position or null
*/
public Position getPosition(int depth) {
Position subPos = this;
for (int i = 0; i < depth && subPos != null; ++i, subPos = subPos.getPosition()) {
// no-op
}
return subPos;
}
/** @return true if generates areas */
public boolean generatesAreas() {
return false;
}
/**
* Sets the index of this position in the sequence of Position elements.
*
* @param value this position's index
*/
public void setIndex(int value) {
this.index = value;
}
/**
* Returns the index of this position in the sequence of Position elements.
*
* @return the index of this position in the sequence of Position elements
*/
public int getIndex() {
return this.index;
}
/** @return short name of associated layout manager */
protected String getShortLMName() {
if (getLM() != null) {
String lm = getLM().toString();
int idx = lm.lastIndexOf('.');
if (idx >= 0 && lm.indexOf('@') > 0) {
return lm.substring(idx + 1);
} else {
return lm;
}
} else {
return "null";
}
}
/** {@inheritDoc} */
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append("Position:").append(getIndex()).append("(");
sb.append(getShortLMName());
sb.append(")");
return sb.toString();
}
}
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