org.jopendocument.dom.spreadsheet.BytesProducer Maven / Gradle / Ivy
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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 2008-2013 jOpenDocument, by ILM Informatique. All rights reserved.
*
* The contents of this file are subject to the terms of the GNU
* General Public License Version 3 only ("GPL").
* You may not use this file except in compliance with the License.
* You can obtain a copy of the License at http://www.gnu.org/licenses/gpl-3.0.html
* See the License for the specific language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each file.
*
*/
package org.jopendocument.dom.spreadsheet;
import org.jopendocument.dom.ODFrame;
import org.jopendocument.util.ImageInfo;
import org.jopendocument.util.ImageUtils;
import java.awt.Color;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import javax.imageio.ImageIO;
import org.jdom.Element;
abstract class BytesProducer {
/**
* The data of an image to put in frame
.
*
* @param frame the frame where this image will be put.
* @return the corresponding bytes.
*/
abstract byte[] getBytes(ODFrame frame);
/**
* The format of the data returned by {@link #getBytes(Element)}.
*
* @return the name of the format, null
if unknown, eg "png".
*/
abstract String getFormat();
// *** concrete subclasses
// a no-op Producer
static final class ByteArrayProducer extends BytesProducer {
private final byte[] data;
private final boolean keepRatio;
public ByteArrayProducer(byte[] data) {
this(data, false);
}
public ByteArrayProducer(byte[] data, boolean keepRatio) {
super();
this.data = data;
this.keepRatio = keepRatio;
}
@Override
public byte[] getBytes(final ODFrame frame) {
if (this.keepRatio) {
final ImageInfo info = new ImageInfo();
info.setInput(new ByteArrayInputStream(this.data));
if (!info.check())
throw new IllegalStateException("unable to parse the picture");
final double imgRatio = info.getWidth() / (double) info.getHeight();
final double ratio = frame.getRatio();
// svg:x="0.075cm" svg:y="0.343cm"
if (imgRatio > ratio) {
final double newFrameHeight = frame.getWidth().doubleValue() / imgRatio;
final double diff = frame.getHeight().doubleValue() - newFrameHeight;
frame.setSVGAttr("y", frame.getY().doubleValue() + diff / 2.0d);
frame.setSVGAttr("height", newFrameHeight);
} else {
final double newFrameWidth = frame.getHeight().doubleValue() * imgRatio;
final double diff = frame.getWidth().doubleValue() - newFrameWidth;
frame.setSVGAttr("x", frame.getX().doubleValue() + diff / 2.0d);
frame.setSVGAttr("width", newFrameWidth);
}
// table:end-cell-address="Feuille1.F52" table:end-x="2.247cm" table:end-y="0.066cm"
final Element frameElem = frame.getElement();
frameElem.removeAttribute("end-cell-address", frameElem.getNamespace("table"));
frameElem.removeAttribute("end-x", frameElem.getNamespace("table"));
frameElem.removeAttribute("end-y", frameElem.getNamespace("table"));
}
return this.data;
}
@Override
public String getFormat() {
return null;
}
}
// will generate a new png image (and can also keep ratio)
static final class ImageProducer extends BytesProducer {
private final Image img;
private final boolean keepRatio;
public ImageProducer(Image img, boolean keepRatio) {
super();
this.img = img;
this.keepRatio = keepRatio;
}
@Override
public byte[] getBytes(final ODFrame frame) {
final BufferedImage bImg;
if (this.keepRatio) {
final float ratio = (float) frame.getRatio();
bImg = ImageUtils.createQualityResizedImage(this.img, ratio, true, Color.WHITE, true);
} else
bImg = ImageUtils.createQualityResizedImage(this.img, this.img.getWidth(null), this.img.getHeight(null), true, true, Color.WHITE, true);
final ByteArrayOutputStream out = new ByteArrayOutputStream(1024 * 1024);
try {
ImageIO.write(bImg, getFormat(), out);
} catch (IOException e) {
throw new IllegalStateException("unable to export " + bImg + " to " + getFormat());
}
return out.toByteArray();
}
@Override
public String getFormat() {
return "png";
}
}
}