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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.hslf.model;
 
 import java.util.List;
 
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.

Author(s):
Yegor Kozlov
 
 public final class Freeform extends AutoShape {
 
     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.

Parameters:
escherRecord EscherSpContainer container which holds information about this shape
parent the parent of the shape
 
    protected Freeform(EscherContainerRecord escherRecordShape parent){
         super(escherRecordparent);
 
     }

    
Create a new Freeform. This constructor is used when a new shape is created.

Parameters:
parent the parent of this Shape. For example, if this text box is a cell in a table then the parent is Table.
 
     public Freeform(Shape parent){
         super(nullparent);
          = createSpContainer(.parent instanceof ShapeGroup);
     }

    
Create a new Freeform. This constructor is used when a new shape is created.
 
     public Freeform(){
         this(null);
     }

    
Set the shape path

Parameters:
path
 
     public void setPath(GeneralPath path)
     {
         Rectangle2D bounds = path.getBounds2D();
         PathIterator it = path.getPathIterator(new AffineTransform());
 
         List<byte[]> segInfo = new ArrayList<byte[]>();
         List<Point2D.DoublepntInfo = new ArrayList<Point2D.Double>();
         boolean isClosed = false;
        while (!it.isDone()) {
            double[] vals = new double[6];
            int type = it.currentSegment(vals);
            switch (type) {
                case .:
                    pntInfo.add(new Point2D.Double(vals[0], vals[1]));
                    segInfo.add();
                    break;
                case .:
                    pntInfo.add(new Point2D.Double(vals[0], vals[1]));
                    segInfo.add();
                    segInfo.add();
                    break;
                case .:
                    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();
                    segInfo.add();
                    break;
                case .:
                    //TODO: figure out how to convert SEG_QUADTO into SEG_CUBICTO
                    .log(."SEG_QUADTO is not supported");
                    break;
                case .:
                    pntInfo.add(pntInfo.get(0));
                    segInfo.add();
                    segInfo.add();
                    segInfo.add();
                    segInfo.add();
                    isClosed = true;
                    break;
            }
            it.next();
        }
        if(!isClosedsegInfo.add();
        segInfo.add(new byte[]{0x00, (byte)0x80});
        EscherArrayProperty verticesProp = new EscherArrayProperty((short)(. + 0x4000), falsenull);
        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)((pnt.getX() - bounds.getX())*/));
            LittleEndian.putShort(data, 2, (short)((pnt.getY() - bounds.getY())*/));
            verticesProp.setElement(idata);
        }
        opt.addEscherProperty(verticesProp);
        EscherArrayProperty segmentsProp = new EscherArrayProperty((short)(. + 0x4000), falsenull);
        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(iseg);
        }
        opt.addEscherProperty(segmentsProp);
        opt.sortProperties();
        setAnchor(bounds);
    }

    
Gets the freeform path

Returns:
the freeform path
     public GeneralPath getPath(){
        EscherArrayProperty verticesProp = (EscherArrayProperty)getEscherProperty(opt, (short)(. + 0x4000));
        if(verticesProp == nullverticesProp = (EscherArrayProperty)getEscherProperty(opt.);
        EscherArrayProperty segmentsProp = (EscherArrayProperty)getEscherProperty(opt, (short)(. + 0x4000));
        if(segmentsProp == nullsegmentsProp = (EscherArrayProperty)getEscherProperty(opt.);
        //sanity check
        if(verticesProp == null) {
            .log(."Freeform is missing GEOMETRY__VERTICES ");
            return null;
        }
        if(segmentsProp == null) {
            .log(."Freeform is missing GEOMETRY__SEGMENTINFO ");
            return null;
        }
        GeneralPath path = new GeneralPath();
        int numPoints = verticesProp.getNumberOfElementsInArray();
        int numSegments = segmentsProp.getNumberOfElementsInArray();
        for (int i = 0, j = 0; i < numSegments && j < numPointsi++) {
            byte[] elem = segmentsProp.getElement(i);
            if(Arrays.equals(elem)){
                byte[] p = verticesProp.getElement(j++);
                short x = LittleEndian.getShort(p, 0);
                short y = LittleEndian.getShort(p, 2);
                path.moveTo(
                        ((float)x*/),
                        ((float)y*/));
            } else if (Arrays.equals(elem) || Arrays.equals(elem)){
                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(
                        ((float)x1*/), ((float)y1*/),
                        ((float)x2*/), ((float)y2*/),
                        ((float)x3*/), ((float)y3*/));
            } else if (Arrays.equals(elem)){
                i++;
                byte[] pnext = segmentsProp.getElement(i);
                if(Arrays.equals(pnext)){
                    if(j + 1 < numPoints){
                        byte[] p = verticesProp.getElement(j++);
                        short x = LittleEndian.getShort(p, 0);
                        short y = LittleEndian.getShort(p, 2);
                        path.lineTo(
                                ((float)x*/), ((float)y*/));
                    }
                } else if (Arrays.equals(pnext)){
                    path.closePath();
                }
            }
        }
        return path;
    }
    public java.awt.Shape getOutline(){
        GeneralPath path =  getPath();
        if(path == null) {
            // return empty path if either GEOMETRY__VERTICES or GEOMETRY__SEGMENTINFO is missing, see Bugzilla 54188
            return new GeneralPath();
        }
        Rectangle2D anchor = getAnchor2D();
        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 at.createTransformedShape(path);
    }
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