| /* |
| * 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.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; |
| } |
| } |