org.apache.fop.render.txt.border.DashedBorderElement Maven / Gradle / Ivy
/*
* 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: DashedBorderElement.java 679326 2008-07-24 09:35:34Z vhennebert $ */
package org.apache.fop.render.txt.border;
import java.util.Arrays;
/**
* This class is responsible for managing of dashed border elements.
*/
public class DashedBorderElement extends AbstractBorderElement {
private static final char DASH_HORIZONTAL = '-';
private static final char DASH_VERTICAL = '|';
private static final char UNDEFINED = '?';
private static final int UP2 = 1;
private static final int RIGHT2 = 2;
private static final int DOWN2 = 4;
private static final int LEFT2 = 8;
private static char[] map = new char[20];
static {
Arrays.fill(map, UNDEFINED);
map[0] = ' ';
map[UP2] = DASH_VERTICAL;
map[DOWN2] = DASH_VERTICAL;
map[UP2 + DOWN2] = DASH_VERTICAL;
map[LEFT2] = DASH_HORIZONTAL;
map[RIGHT2] = DASH_HORIZONTAL;
map[LEFT2 + RIGHT2] = DASH_HORIZONTAL;
}
/**
* Constructs a newly allocated DashedBorderElement object.
* Fills data using superclass constructor.
*
* @param type binary representation of type gives data
*/
public DashedBorderElement(int type) {
super(type);
}
/**
* Merges dashed border element with instance of solid and double border
* element, returns instance of SolidAndDoubleBorderElement.
*
* @param sdb instance of SolidAndDoubleBorderElement to merge
* @return merged border element
*/
private AbstractBorderElement mergeSolid(SolidAndDoubleBorderElement sdb) {
AbstractBorderElement e = new SolidAndDoubleBorderElement(EN_SOLID, 0);
for (int i = 0; i < 4; i++) {
e.setData(i, Math.max(data[i], sdb.getData(i)));
}
return e;
}
/**
* Merges dashed border element with dashed border element and returns
* instance of DashedBorderElement.
*
* @param dbe instance of DashedBorderElement to merge
* @return merged border element
*/
private AbstractBorderElement mergeDashed(DashedBorderElement dbe) {
for (int i = 0; i < 4; i++) {
data[i] = Math.max(data[i], dbe.getData(i));
}
return this;
}
/**
* Converts dashed border element to
* SolidAndDoubleBorderElement.
*
* @return converted instance of SolidAndDoubleBorderElement
*/
private AbstractBorderElement toSolidAndDouble() {
AbstractBorderElement e = new SolidAndDoubleBorderElement(EN_SOLID, 0);
for (int i = 0; i < 4; i++) {
e.setData(i, data[i]);
}
return e;
}
/**
* Merges with border element.
* @param e instance of AbstractBorderElement
* @return instance of AbstractBorderElement
*/
public AbstractBorderElement merge(AbstractBorderElement e) {
AbstractBorderElement abe = this;
if (e instanceof SolidAndDoubleBorderElement) {
abe = mergeSolid((SolidAndDoubleBorderElement) e);
} else if (e instanceof DashedBorderElement) {
abe = mergeDashed((DashedBorderElement) e);
} else {
abe = e;
}
return abe;
}
/**
* {@inheritDoc}
*/
public char convert2Char() {
int key = 0;
key += data[UP] * UP2;
key += data[DOWN] * DOWN2;
key += data[LEFT] * LEFT2;
key += data[RIGHT] * RIGHT2;
char ch = map[key];
if (ch == UNDEFINED) {
ch = toSolidAndDouble().convert2Char();
}
return ch;
}
}