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Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF.
/*
* 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: AbstractGraphicsCoord.java 1761026 2016-09-16 12:50:43Z ssteiner $ */
package org.apache.fop.afp.goca;
import java.io.IOException;
import java.io.OutputStream;
import org.apache.fop.afp.util.BinaryUtils;
/**
* A base class encapsulating the structure of coordinate based GOCA objects
*/
public abstract class AbstractGraphicsCoord extends AbstractGraphicsDrawingOrder {
/** array of x/y coordinates */
protected int[] coords;
/** if true, then uses relative drawing order */
protected boolean relative;
/**
* Constructor
*
* @param coords the x/y coordinates for this object
*/
public AbstractGraphicsCoord(int[] coords) {
if (coords == null) {
relative = true;
} else {
this.coords = coords;
}
}
/**
* Constructor
*
* @param coords the x/y coordinates for this object
* @param relative true if relative drawing order
*/
public AbstractGraphicsCoord(int[] coords, boolean relative) {
this(coords);
this.relative = relative;
}
/**
* Constructor
*
* @param x the x coordinate for this object
* @param y the y coordinate for this object
*/
public AbstractGraphicsCoord(int x, int y) {
this(new int[] {x, y});
}
/**
* Constructor
*
* @param x1 the x1 coordinate for this object
* @param y1 the y1 coordinate for this object
* @param x2 the x2 coordinate for this object
* @param y2 the y2 coordinate for this object
*/
public AbstractGraphicsCoord(int x1, int y1, int x2, int y2) {
this(new int[] {x1, y1, x2, y2});
}
/** {@inheritDoc} */
public int getDataLength() {
return 2 + (coords != null ? coords.length * 2 : 0);
}
/**
* Returns the coordinate data start index
*
* @return the coordinate data start index
*/
int getCoordinateDataStartIndex() {
return 2;
}
/**
* Returns the coordinate data
*
* @return the coordinate data
*/
byte[] getData() {
byte[] data = super.getData();
if (coords != null) {
addCoords(data, getCoordinateDataStartIndex());
}
return data;
}
/** {@inheritDoc} */
public void writeToStream(OutputStream os) throws IOException {
os.write(getData());
}
/**
* Adds the coordinates to the structured field data
*
* @param data the structured field data
* @param fromIndex the start index
*/
protected void addCoords(byte[] data, int fromIndex) {
// X/Y POS
for (int i = 0; i < coords.length; i++, fromIndex += 2) {
byte[] coord = BinaryUtils.convert(coords[i], 2);
data[fromIndex] = coord[0];
data[fromIndex + 1] = coord[1];
}
}
/** {@inheritDoc} */
public String toString() {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < coords.length; i++) {
if (sb.length() > 0) {
sb.append(',');
}
sb.append((i % 2 == 0) ? 'x' : 'y');
sb.append(i / 2);
sb.append('=');
sb.append(coords[i]);
}
return getName() + "{" + sb + "}";
}
/**
* Returns true if this is a relative drawing order
*
* @return true if this is a relative drawing order
*/
protected boolean isRelative() {
return this.relative;
}
}
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