ooxml/src/main/java/org/apache/poi/xdgf/usermodel/section/geometry/RelCubBezTo.java

/* ====================================================================
   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.xdgf.usermodel.section.geometry;

import org.apache.poi.ooxml.POIXMLException;
import org.apache.poi.xdgf.usermodel.XDGFCell;
import org.apache.poi.xdgf.usermodel.XDGFShape;

import com.microsoft.schemas.office.visio.x2012.main.CellType;
import com.microsoft.schemas.office.visio.x2012.main.RowType;

public class RelCubBezTo implements GeometryRow {

    RelCubBezTo _master;

    // The x-coordinate of the ending vertex of a cubic Bezier curve relative to
    // the width of the shape.
    Double x;

    // The y-coordinate of the ending vertex of a cubic Bezier curve relative to
    // the height of the shape.
    Double y;

    // The x-coordinate of the curve's beginning control point relative to the
    // shape's width; a point on the arc. The control point is best located
    // between the beginning and ending vertices of the arc.
    Double a;

    // The y-coordinate of a curve's beginning control point relative to the
    // shape's height.
    Double b;

    // The x-coordinate of the curve's ending control point relative to the
    // shape's width; a point on the arc. The control point is best located
    // between the beginning control point and ending vertices of the arc.
    Double c;

    // The y-coordinate of a curve's ending control point relative to the
    // shape's height.
    Double d;

    Boolean deleted;

    // TODO: support formulas

    public RelCubBezTo(RowType row) {

        if (row.isSetDel())
            deleted = row.getDel();

        for (CellType cell : row.getCellArray()) {
            String cellName = cell.getN();

            if (cellName.equals("X")) {
                x = XDGFCell.parseDoubleValue(cell);
            } else if (cellName.equals("Y")) {
                y = XDGFCell.parseDoubleValue(cell);
            } else if (cellName.equals("A")) {
                a = XDGFCell.parseDoubleValue(cell);
            } else if (cellName.equals("B")) {
                b = XDGFCell.parseDoubleValue(cell);
            } else if (cellName.equals("C")) {
                c = XDGFCell.parseDoubleValue(cell);
            } else if (cellName.equals("D")) {
                d = XDGFCell.parseDoubleValue(cell);
            } else {
                throw new POIXMLException("Invalid cell '" + cellName
                        + "' in RelCubBezTo row");
            }
        }
    }

    public boolean getDel() {
        if (deleted != null)
            return deleted;

        return _master != null && _master.getDel();
    }

    public Double getX() {
        return x == null ? _master.x : x;
    }

    public Double getY() {
        return y == null ? _master.y : y;
    }

    public Double getA() {
        return a == null ? _master.a : a;
    }

    public Double getB() {
        return b == null ? _master.b : b;
    }

    public Double getC() {
        return c == null ? _master.c : c;
    }

    public Double getD() {
        return d == null ? _master.d : d;
    }

    @Override
    public void setupMaster(GeometryRow row) {
        _master = (RelCubBezTo) row;
    }

    @Override
    public void addToPath(java.awt.geom.Path2D.Double path, XDGFShape parent) {

        if (getDel())
            return;

        double w = parent.getWidth();
        double h = parent.getHeight();

        path.curveTo(getA() * w, getB() * h, getC() * w, getD() * h,
                getX() * w, getY() * h);
    }
}