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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.
==================================================================== */
package org.apache.poi.hemf.usermodel;
import static java.lang.Math.abs;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Dimension2D;
import java.awt.geom.Rectangle2D;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Spliterator;
import java.util.function.Consumer;
import java.util.function.Supplier;
import org.apache.poi.common.usermodel.GenericRecord;
import org.apache.poi.hemf.draw.HemfDrawProperties;
import org.apache.poi.hemf.draw.HemfGraphics;
import org.apache.poi.hemf.record.emf.HemfHeader;
import org.apache.poi.hemf.record.emf.HemfRecord;
import org.apache.poi.hemf.record.emf.HemfRecordIterator;
import org.apache.poi.hemf.record.emf.HemfWindowing;
import org.apache.poi.hwmf.usermodel.HwmfEmbedded;
import org.apache.poi.util.Dimension2DDouble;
import org.apache.poi.util.Internal;
import org.apache.poi.util.LittleEndianInputStream;
import org.apache.poi.util.Units;
/**
* Read-only EMF extractor. Lots remain
*/
@Internal
public class HemfPicture implements Iterable, GenericRecord {
private final LittleEndianInputStream stream;
private final List records = new ArrayList<>();
private boolean isParsed = false;
public HemfPicture(InputStream is) {
this(new LittleEndianInputStream(is));
}
public HemfPicture(LittleEndianInputStream is) {
stream = is;
}
public HemfHeader getHeader() {
return (HemfHeader)getRecords().get(0);
}
public List getRecords() {
if (!isParsed) {
// in case the (first) parsing throws an exception, we can provide the
// records up to that point
isParsed = true;
HemfHeader[] header = new HemfHeader[1];
new HemfRecordIterator(stream).forEachRemaining(r -> {
if (r instanceof HemfHeader) {
header[0] = (HemfHeader) r;
}
r.setHeader(header[0]);
records.add(r);
});
}
return records;
}
@Override
public Iterator iterator() {
return getRecords().iterator();
}
@Override
public Spliterator spliterator() {
return getRecords().spliterator();
}
@Override
public void forEach(Consumer action) {
getRecords().forEach(action);
}
/**
* Returns the bounding box in device-independent units - usually this is in .01 millimeter units
*
* @return the bounding box in device-independent units
*/
public Rectangle2D getBounds() {
Rectangle2D dim = getHeader().getFrameRectangle();
double x = dim.getX(), y = dim.getY();
double width = dim.getWidth(), height = dim.getHeight();
if (dim.isEmpty() || Math.rint(width) == 0 || Math.rint(height) == 0) {
for (HemfRecord r : getRecords()) {
if (r instanceof HemfWindowing.EmfSetWindowExtEx) {
HemfWindowing.EmfSetWindowExtEx extEx = (HemfWindowing.EmfSetWindowExtEx)r;
Dimension2D d = extEx.getSize();
width = d.getWidth();
height = d.getHeight();
// keep searching - sometimes there's another record
}
if (r instanceof HemfWindowing.EmfSetWindowOrgEx) {
HemfWindowing.EmfSetWindowOrgEx orgEx = (HemfWindowing.EmfSetWindowOrgEx)r;
x = orgEx.getX();
y = orgEx.getY();
}
}
}
return new Rectangle2D.Double(x, y, width, height);
}
/**
* Return the image bounds in points
*
* @return the image bounds in points
*/
public Rectangle2D getBoundsInPoints() {
return Units.pixelToPoints(getHeader().getBoundsRectangle());
}
/**
* Return the image size in points
*
* @return the image size in points
*/
public Dimension2D getSize() {
final Rectangle2D b = getBoundsInPoints();
return new Dimension2DDouble(abs(b.getWidth()), abs(b.getHeight()));
}
private static double minX(Rectangle2D bounds) {
return Math.min(bounds.getMinX(), bounds.getMaxX());
}
private static double minY(Rectangle2D bounds) {
return Math.min(bounds.getMinY(), bounds.getMaxY());
}
public void draw(Graphics2D ctx, Rectangle2D graphicsBounds) {
final Shape clip = ctx.getClip();
final AffineTransform at = ctx.getTransform();
try {
Rectangle2D emfBounds = getHeader().getBoundsRectangle();
// scale output bounds to image bounds
ctx.translate(graphicsBounds.getCenterX(), graphicsBounds.getCenterY());
ctx.scale(graphicsBounds.getWidth()/emfBounds.getWidth(), graphicsBounds.getHeight()/emfBounds.getHeight());
ctx.translate(-emfBounds.getCenterX(), -emfBounds.getCenterY());
HemfGraphics g = new HemfGraphics(ctx, emfBounds);
HemfDrawProperties prop = g.getProperties();
prop.setWindowOrg(emfBounds.getX(), emfBounds.getY());
prop.setWindowExt(emfBounds.getWidth(), emfBounds.getHeight());
prop.setViewportOrg(emfBounds.getX(), emfBounds.getY());
prop.setViewportExt(emfBounds.getWidth(), emfBounds.getHeight());
for (HemfRecord r : getRecords()) {
try {
g.draw(r);
} catch (RuntimeException ignored) {
}
}
} finally {
ctx.setTransform(at);
ctx.setClip(clip);
}
}
public Iterable getEmbeddings() {
return () -> new HemfEmbeddedIterator(HemfPicture.this);
}
@Override
public List getGenericChildren() {
return getRecords();
}
@Override
public Map> getGenericProperties() {
return null;
}
}