org.apache.poi.hslf.usermodel.HSLFFreeformShape Maven / Gradle / Ivy
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package org.apache.poi.hslf.usermodel;
import java.awt.geom.AffineTransform;
import java.awt.geom.GeneralPath;
import java.awt.geom.PathIterator;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.apache.poi.ddf.AbstractEscherOptRecord;
import org.apache.poi.ddf.EscherArrayProperty;
import org.apache.poi.ddf.EscherContainerRecord;
import org.apache.poi.ddf.EscherProperties;
import org.apache.poi.ddf.EscherSimpleProperty;
import org.apache.poi.sl.usermodel.FreeformShape;
import org.apache.poi.sl.usermodel.ShapeContainer;
import org.apache.poi.sl.usermodel.ShapeType;
import org.apache.poi.util.LittleEndian;
import org.apache.poi.util.POILogger;
import org.apache.poi.util.Units;
/**
* A "Freeform" shape.
*
*
* Shapes drawn with the "Freeform" tool have cubic bezier curve segments in the smooth sections
* and straight-line segments in the straight sections. This object closely corresponds to java.awt.geom.GeneralPath.
*
*/
public final class HSLFFreeformShape extends HSLFAutoShape implements FreeformShape {
public static final byte[] SEGMENTINFO_MOVETO = new byte[]{0x00, 0x40};
public static final byte[] SEGMENTINFO_LINETO = new byte[]{0x00, (byte)0xAC};
public static final byte[] SEGMENTINFO_ESCAPE = new byte[]{0x01, 0x00};
public static final byte[] SEGMENTINFO_ESCAPE2 = new byte[]{0x01, 0x20};
public static final byte[] SEGMENTINFO_CUBICTO = new byte[]{0x00, (byte)0xAD};
public static final byte[] SEGMENTINFO_CUBICTO2 = new byte[]{0x00, (byte)0xB3}; //OpenOffice inserts 0xB3 instead of 0xAD.
public static final byte[] SEGMENTINFO_CLOSE = new byte[]{0x01, (byte)0x60};
public static final byte[] SEGMENTINFO_END = new byte[]{0x00, (byte)0x80};
/**
* Create a Freeform object and initialize it from the supplied Record container.
*
* @param escherRecord EscherSpContainer container which holds information about this shape
* @param parent the parent of the shape
*/
protected HSLFFreeformShape(EscherContainerRecord escherRecord, ShapeContainer parent){
super(escherRecord, parent);
}
/**
* Create a new Freeform. This constructor is used when a new shape is created.
*
* @param parent the parent of this Shape. For example, if this text box is a cell
* in a table then the parent is Table.
*/
public HSLFFreeformShape(ShapeContainer parent){
super((EscherContainerRecord)null, parent);
_escherContainer = createSpContainer(ShapeType.NOT_PRIMITIVE, parent instanceof HSLFGroupShape);
}
/**
* Create a new Freeform. This constructor is used when a new shape is created.
*
*/
public HSLFFreeformShape(){
this(null);
}
@Override
public int setPath(GeneralPath path) {
Rectangle2D bounds = path.getBounds2D();
PathIterator it = path.getPathIterator(new AffineTransform());
List segInfo = new ArrayList();
List pntInfo = new ArrayList();
boolean isClosed = false;
int numPoints = 0;
while (!it.isDone()) {
double[] vals = new double[6];
int type = it.currentSegment(vals);
switch (type) {
case PathIterator.SEG_MOVETO:
pntInfo.add(new Point2D.Double(vals[0], vals[1]));
segInfo.add(SEGMENTINFO_MOVETO);
numPoints++;
break;
case PathIterator.SEG_LINETO:
pntInfo.add(new Point2D.Double(vals[0], vals[1]));
segInfo.add(SEGMENTINFO_LINETO);
segInfo.add(SEGMENTINFO_ESCAPE);
numPoints++;
break;
case PathIterator.SEG_CUBICTO:
pntInfo.add(new Point2D.Double(vals[0], vals[1]));
pntInfo.add(new Point2D.Double(vals[2], vals[3]));
pntInfo.add(new Point2D.Double(vals[4], vals[5]));
segInfo.add(SEGMENTINFO_CUBICTO);
segInfo.add(SEGMENTINFO_ESCAPE2);
numPoints++;
break;
case PathIterator.SEG_QUADTO:
//TODO: figure out how to convert SEG_QUADTO into SEG_CUBICTO
logger.log(POILogger.WARN, "SEG_QUADTO is not supported");
break;
case PathIterator.SEG_CLOSE:
pntInfo.add(pntInfo.get(0));
segInfo.add(SEGMENTINFO_LINETO);
segInfo.add(SEGMENTINFO_ESCAPE);
segInfo.add(SEGMENTINFO_LINETO);
segInfo.add(SEGMENTINFO_CLOSE);
isClosed = true;
numPoints++;
break;
default:
logger.log(POILogger.WARN, "Ignoring invalid segment type "+type);
break;
}
it.next();
}
if(!isClosed) segInfo.add(SEGMENTINFO_LINETO);
segInfo.add(new byte[]{0x00, (byte)0x80});
AbstractEscherOptRecord opt = getEscherOptRecord();
opt.addEscherProperty(new EscherSimpleProperty(EscherProperties.GEOMETRY__SHAPEPATH, 0x4));
EscherArrayProperty verticesProp = new EscherArrayProperty((short)(EscherProperties.GEOMETRY__VERTICES + 0x4000), false, null);
verticesProp.setNumberOfElementsInArray(pntInfo.size());
verticesProp.setNumberOfElementsInMemory(pntInfo.size());
verticesProp.setSizeOfElements(0xFFF0);
for (int i = 0; i < pntInfo.size(); i++) {
Point2D.Double pnt = pntInfo.get(i);
byte[] data = new byte[4];
LittleEndian.putShort(data, 0, (short)Units.pointsToMaster(pnt.getX() - bounds.getX()));
LittleEndian.putShort(data, 2, (short)Units.pointsToMaster(pnt.getY() - bounds.getY()));
verticesProp.setElement(i, data);
}
opt.addEscherProperty(verticesProp);
EscherArrayProperty segmentsProp = new EscherArrayProperty((short)(EscherProperties.GEOMETRY__SEGMENTINFO + 0x4000), false, null);
segmentsProp.setNumberOfElementsInArray(segInfo.size());
segmentsProp.setNumberOfElementsInMemory(segInfo.size());
segmentsProp.setSizeOfElements(0x2);
for (int i = 0; i < segInfo.size(); i++) {
byte[] seg = segInfo.get(i);
segmentsProp.setElement(i, seg);
}
opt.addEscherProperty(segmentsProp);
opt.addEscherProperty(new EscherSimpleProperty(EscherProperties.GEOMETRY__RIGHT, Units.pointsToMaster(bounds.getWidth())));
opt.addEscherProperty(new EscherSimpleProperty(EscherProperties.GEOMETRY__BOTTOM, Units.pointsToMaster(bounds.getHeight())));
opt.sortProperties();
setAnchor(bounds);
return numPoints;
}
@Override
public GeneralPath getPath(){
AbstractEscherOptRecord opt = getEscherOptRecord();
opt.addEscherProperty(new EscherSimpleProperty(EscherProperties.GEOMETRY__SHAPEPATH, 0x4));
EscherArrayProperty verticesProp = getEscherProperty(opt, (short)(EscherProperties.GEOMETRY__VERTICES + 0x4000));
if(verticesProp == null) verticesProp = getEscherProperty(opt, EscherProperties.GEOMETRY__VERTICES);
EscherArrayProperty segmentsProp = getEscherProperty(opt, (short)(EscherProperties.GEOMETRY__SEGMENTINFO + 0x4000));
if(segmentsProp == null) segmentsProp = getEscherProperty(opt, EscherProperties.GEOMETRY__SEGMENTINFO);
// return empty path if either GEOMETRY__VERTICES or GEOMETRY__SEGMENTINFO is missing, see Bugzilla 54188
GeneralPath path = new GeneralPath();
//sanity check
if(verticesProp == null) {
logger.log(POILogger.WARN, "Freeform is missing GEOMETRY__VERTICES ");
return path;
}
if(segmentsProp == null) {
logger.log(POILogger.WARN, "Freeform is missing GEOMETRY__SEGMENTINFO ");
return path;
}
int numPoints = verticesProp.getNumberOfElementsInArray();
int numSegments = segmentsProp.getNumberOfElementsInArray();
for (int i = 0, j = 0; i < numSegments && j < numPoints; i++) {
byte[] elem = segmentsProp.getElement(i);
if(Arrays.equals(elem, SEGMENTINFO_MOVETO)){
byte[] p = verticesProp.getElement(j++);
short x = LittleEndian.getShort(p, 0);
short y = LittleEndian.getShort(p, 2);
path.moveTo(Units.masterToPoints(x), Units.masterToPoints(y));
} else if (Arrays.equals(elem, SEGMENTINFO_CUBICTO) || Arrays.equals(elem, SEGMENTINFO_CUBICTO2)){
i++;
byte[] p1 = verticesProp.getElement(j++);
short x1 = LittleEndian.getShort(p1, 0);
short y1 = LittleEndian.getShort(p1, 2);
byte[] p2 = verticesProp.getElement(j++);
short x2 = LittleEndian.getShort(p2, 0);
short y2 = LittleEndian.getShort(p2, 2);
byte[] p3 = verticesProp.getElement(j++);
short x3 = LittleEndian.getShort(p3, 0);
short y3 = LittleEndian.getShort(p3, 2);
path.curveTo(
Units.masterToPoints(x1), Units.masterToPoints(y1),
Units.masterToPoints(x2), Units.masterToPoints(y2),
Units.masterToPoints(x3), Units.masterToPoints(y3));
} else if (Arrays.equals(elem, SEGMENTINFO_LINETO)){
i++;
byte[] pnext = segmentsProp.getElement(i);
if(Arrays.equals(pnext, SEGMENTINFO_ESCAPE)){
if(j + 1 < numPoints){
byte[] p = verticesProp.getElement(j++);
short x = LittleEndian.getShort(p, 0);
short y = LittleEndian.getShort(p, 2);
path.lineTo(Units.masterToPoints(x), Units.masterToPoints(y));
}
} else if (Arrays.equals(pnext, SEGMENTINFO_CLOSE)){
path.closePath();
}
}
}
Rectangle2D anchor = getAnchor();
Rectangle2D bounds = path.getBounds2D();
AffineTransform at = new AffineTransform();
at.translate(anchor.getX(), anchor.getY());
at.scale(
anchor.getWidth()/bounds.getWidth(),
anchor.getHeight()/bounds.getHeight()
);
return new GeneralPath(at.createTransformedShape(path));
}
}
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