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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.sl.draw;
import java.awt.BasicStroke;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.util.Locale;
import org.apache.poi.sl.usermodel.PlaceableShape;
import org.apache.poi.sl.usermodel.Shape;
import org.apache.poi.sl.usermodel.StrokeStyle;
import org.apache.poi.sl.usermodel.StrokeStyle.LineCap;
import org.apache.poi.sl.usermodel.StrokeStyle.LineDash;
public class DrawShape implements Drawable {
protected final Shape shape;
public DrawShape(Shape shape) {
this.shape = shape;
}
/**
* Sometimes it's necessary to distinguish between XSLF/HSLF for the rendering.
* Use this method on the shape to determine, if we work on the BIFF implementation
*
* @param shape the shape to render
* @return {@code true} if HSLF implementation is used
*/
static boolean isHSLF(Object shape) {
return shape.getClass().getName().toLowerCase(Locale.ROOT).contains("hslf");
}
/**
* Apply 2-D transforms before drawing this shape. This includes rotation and flipping.
*
* @param graphics the graphics whos transform matrix will be modified
*/
@Override
public void applyTransform(Graphics2D graphics) {
if (!(shape instanceof PlaceableShape) || graphics == null) {
return;
}
final PlaceableShape ps = (PlaceableShape)shape;
final boolean isHSLF = isHSLF(shape);
final Rectangle2D anchor = getAnchor(graphics, ps);
char cmds[] = isHSLF ? new char[]{ 'h','v','r' } : new char[]{ 'r','h','v' };
for (char ch : cmds) {
switch (ch) {
case 'h':
//flip horizontal
if (ps.getFlipHorizontal()) {
graphics.translate(anchor.getX() + anchor.getWidth(), anchor.getY());
graphics.scale(-1, 1);
graphics.translate(-anchor.getX(), -anchor.getY());
}
break;
case 'v':
//flip vertical
if (ps.getFlipVertical()) {
graphics.translate(anchor.getX(), anchor.getY() + anchor.getHeight());
graphics.scale(1, -1);
graphics.translate(-anchor.getX(), -anchor.getY());
}
break;
case 'r':
// rotation
double rotation = ps.getRotation();
if (rotation != 0.) {
// PowerPoint rotates shapes relative to the geometric center
double centerX = anchor.getCenterX();
double centerY = anchor.getCenterY();
// transformation is applied reversed ...
graphics.translate(centerX, centerY);
graphics.rotate(Math.toRadians(rotation));
graphics.translate(-centerX, -centerY);
}
break;
default:
throw new RuntimeException("unexpected transform code " + ch);
}
}
}
private static double safeScale(double dim1, double dim2) {
if (dim1 == 0.) {
return 1;
}
return (dim2 == 0.) ? 1 : dim1/dim2;
}
@Override
public void draw(Graphics2D graphics) {
}
@Override
public void drawContent(Graphics2D graphics) {
}
public static Rectangle2D getAnchor(Graphics2D graphics, PlaceableShape shape) {
// return getAnchor(graphics, shape.getAnchor());
final boolean isHSLF = isHSLF(shape);
AffineTransform tx = graphics == null ? null : (AffineTransform)graphics.getRenderingHint(Drawable.GROUP_TRANSFORM);
if (tx == null) {
tx = new AffineTransform();
}
final double rotation = ((shape.getRotation() % 360.) + 360.) % 360.;
final int quadrant = (((int)rotation+45)/90)%4;
final Rectangle2D normalizedShape;
// scale to bounding box (bug #53176)
if (quadrant == 1 || quadrant == 3) {
// In a rotated quadrant 1 (=45-135 degrees) and 3 (=225-315 degrees), which is basically a shape in a
// more or less portrait orientation, Powerpoint doesn't use the normal shape anchor,
// but rotate it 90 degress and apply the group transformations.
// We try to revert that distortion and return the normalized anchor.
// It's strange that you'll need to rotate the shape back and forth again, but you can
// think of it, as if you paint the shape on a canvas. First you rotate the canvas, which might
// be already (differently) scaled, so you can paint the shape in its default orientation
// and later on, turn it around again to compare it with its original size ...
final Rectangle2D shapeAnchor = shape.getAnchor();
final Rectangle2D anchorO = tx.createTransformedShape(shapeAnchor).getBounds2D();
final Rectangle2D anchorT;
{
final double centerX = anchorO.getCenterX();
final double centerY = anchorO.getCenterY();
final AffineTransform txs2 = new AffineTransform();
// this handling is only based on try and error ... not sure why h/xslf is handled differently.
if (!isHSLF) {
txs2.translate(centerX, centerY);
txs2.quadrantRotate(1);
txs2.translate(-centerX, -centerY);
txs2.concatenate(tx);
}
txs2.translate(centerX, centerY);
txs2.quadrantRotate(3);
txs2.translate(-centerX, -centerY);
if (isHSLF) {
txs2.concatenate(tx);
}
anchorT = txs2.createTransformedShape(shapeAnchor).getBounds2D();
}
final double scaleX2 = safeScale(anchorO.getWidth(), anchorT.getWidth());
final double scaleY2 = safeScale(anchorO.getHeight(), anchorT.getHeight());
{
double centerX = shapeAnchor.getCenterX();
double centerY = shapeAnchor.getCenterY();
final AffineTransform txs2 = new AffineTransform();
txs2.translate(centerX, centerY);
// no need to rotate back and forth, just apply scaling inverted
txs2.scale(scaleY2, scaleX2);
txs2.translate(-centerX, -centerY);
normalizedShape = txs2.createTransformedShape(shapeAnchor).getBounds2D();
}
} else {
normalizedShape = shape.getAnchor();
}
if (tx.isIdentity()) {
return normalizedShape;
}
final java.awt.Shape anc = tx.createTransformedShape(normalizedShape);
return (anc != null) ? anc.getBounds2D() : normalizedShape;
}
public static Rectangle2D getAnchor(Graphics2D graphics, Rectangle2D anchor) {
if(graphics == null) {
return anchor;
}
AffineTransform tx = (AffineTransform)graphics.getRenderingHint(Drawable.GROUP_TRANSFORM);
if(tx != null && !tx.isIdentity() && tx.createTransformedShape(anchor) != null) {
anchor = tx.createTransformedShape(anchor).getBounds2D();
}
return anchor;
}
protected Shape getShape() {
return shape;
}
protected static BasicStroke getStroke(StrokeStyle strokeStyle) {
float lineWidth = (float) strokeStyle.getLineWidth();
if (lineWidth == 0.0f) {
// Both PowerPoint and OOo draw zero-length lines as 0.25pt
lineWidth = 0.25f;
}
LineDash lineDash = strokeStyle.getLineDash();
if (lineDash == null) {
lineDash = LineDash.SOLID;
}
int dashPatI[] = lineDash.pattern;
final float dash_phase = 0;
float[] dashPatF = null;
if (dashPatI != null) {
dashPatF = new float[dashPatI.length];
for (int i=0; i