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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.render.afp.modca.goca;
-
- import org.apache.fop.render.afp.tools.BinaryUtils;
-
- /**
- * A base class encapsulating the structure of coordinate based GOCA objects
- */
- public abstract class AbstractGraphicsCoord extends AbstractPreparedAFPObject {
-
- /** array of x/y coordinates */
- protected int[] coords = null;
-
- /**
- * @param coords the x/y coordinates for this object
- */
- public AbstractGraphicsCoord(int[] coords) {
- this.coords = coords;
- prepareData();
- }
-
- /**
- * @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});
- }
-
- /**
- * @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});
- }
-
- /**
- * @return the order code to use
- */
- protected abstract byte getOrderCode();
-
- /**
- * @return the length of this order code
- * (typically this is the same as the coordinate length)
- */
- protected int getLength() {
- return this.coords.length * 2;
- }
-
- /**
- * Creates a newly created and initialized byte data
- * @return a newly created and initialized byte data
- */
- protected byte[] createData() {
- int len = getLength();
- byte[] data = new byte[len + 2];
- data[0] = getOrderCode(); // ORDER CODE
- data[1] = (byte)len; // LENGTH
- return data;
- }
-
- /**
- * {@inheritDoc}
- */
- protected void prepareData() {
- super.data = createData();
- int fromIndex = data.length - getLength();
- addCoords(data, fromIndex);
- }
-
- /**
- * 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];
- }
- }
-
- /**
- * @return the short name of this GOCA object
- */
- protected String getName() {
- String className = getClass().getName();
- return className.substring(className.lastIndexOf(".") + 1);
- }
-
- /**
- * {@inheritDoc}
- */
- public String toString() {
- String coordsStr = "";
- for (int i = 0; i < coords.length; i++) {
- coordsStr += (i % 2 == 0) ? "x" : "y";
- coordsStr += (i / 2) + "=" + coords[i] + ",";
- }
- coordsStr = coordsStr.substring(0, coordsStr.length() - 1);
- return getName() + "(" + coordsStr + ")";
- }
- }
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