poi-ooxml/src/test/java/org/apache/poi/xslf/usermodel/TestXSLFDiagram.java

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   this work for additional information regarding copyright ownership.
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package org.apache.poi.xslf.usermodel;

import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.openxml4j.opc.ContentTypes;
import org.apache.poi.sl.usermodel.ColorStyle;
import org.apache.poi.sl.usermodel.PaintStyle;
import org.apache.poi.sl.usermodel.TextParagraph.TextAlign;
import org.apache.poi.util.LocaleUtil;
import org.apache.poi.xslf.XSLFTestDataSamples;
import org.junit.jupiter.api.Test;

import java.awt.Color;
import java.io.IOException;
import java.util.List;
import java.util.stream.Collectors;

import static org.junit.jupiter.api.Assertions.*;

public class TestXSLFDiagram {

    private static final String SIMPLE_DIAGRAM = "smartart-simple.pptx";

    private static List<XSLFDiagram> extractDiagrams(XMLSlideShow slideShow) {
        return slideShow.getSlides()
                .stream()
                .flatMap(s -> extractDiagrams(s).stream())
                .collect(Collectors.toList());
    }

    private static List<XSLFDiagram> extractDiagrams(XSLFSlide slide) {
        return slide.getShapes()
                .stream()
                .filter(s -> s instanceof XSLFDiagram)
                .map(s -> (XSLFDiagram) s)
                .collect(Collectors.toList());
    }

    private static String colorToHex(Color color) {
        return String.format(LocaleUtil.getUserLocale(), "#%02x%02x%02x", color.getRed(), color.getGreen(), color.getBlue());
    }

    private static Color hexToColor(String hex) {
        return Color.decode(hex);
    }

    @Test
    public void testHasDiagram() throws IOException {
        try (XMLSlideShow inputPptx = XSLFTestDataSamples.openSampleDocument(SIMPLE_DIAGRAM)) {
            List<XSLFDiagram> diagrams = extractDiagrams(inputPptx);
            assertEquals(1, diagrams.size());

            XSLFDiagram diagram = diagrams.get(0);
            assertTrue(diagram.hasDiagram());
        }
    }

    @Test
    public void testHasDiagramReadOnlyFile() throws IOException, InvalidFormatException {
        try (XMLSlideShow inputPptx = XSLFTestDataSamples.openSampleDocumentReadOnly(SIMPLE_DIAGRAM)) {
            List<XSLFDiagram> diagrams = extractDiagrams(inputPptx);
            assertEquals(1, diagrams.size());

            XSLFDiagram diagram = diagrams.get(0);
            assertTrue(diagram.hasDiagram());
        }
    }

    @Test
    public void testDiagramContainsShapes() throws IOException {
        try (XMLSlideShow inputPptx = XSLFTestDataSamples.openSampleDocument(SIMPLE_DIAGRAM)) {
            List<XSLFDiagram> diagrams = extractDiagrams(inputPptx);
            assertEquals(1, diagrams.size());

            XSLFDiagram diagram = diagrams.get(0);
            XSLFGroupShape groupShape = diagram.getGroupShape();
            assertNotNull(groupShape);

            // The Group gets the same positioning as the SmartArt. This can be much wider/taller than the content inside.
            assertEquals(groupShape.getAnchor().getWidth(), 113.375, 1E-4);
            assertEquals(groupShape.getAnchor().getHeight(), 74, 1E-4);
            assertEquals(groupShape.getAnchor().getX(), -16.75, 1E-4);
            assertEquals(groupShape.getAnchor().getY(), 5.5, 1E-4);

            List<XSLFShape> shapes = groupShape.getShapes();
            // 4 shapes, 3 text boxes, one shape does not have any text inside it
            assertEquals(7, shapes.size());

            // Shape 1 - Yellow Circle - "abc" center aligned
            String accent4Hex = "#ffc000"; // yellow
            XSLFAutoShape yellowCircle = (XSLFAutoShape) shapes.get(0);
            assertTrue(yellowCircle.getText().isEmpty());
            assertEquals(accent4Hex, colorToHex(yellowCircle.getFillColor()));

            XSLFAutoShape yellowCircleText = (XSLFAutoShape) shapes.get(1);
            assertEquals(yellowCircleText.getText(), "abc");
            assertEquals(TextAlign.CENTER, yellowCircleText.getTextParagraphs().get(0).getTextAlign());

            // Shape 2 - Gradient Blue & Purple - "def" left aligned
            XSLFAutoShape gradientCircle = (XSLFAutoShape) shapes.get(2);
            assertTrue(gradientCircle.getFillPaint() instanceof PaintStyle.GradientPaint);
            assertTrue(gradientCircle.getText().isEmpty());

            XSLFAutoShape gradientCircleText = (XSLFAutoShape) shapes.get(3);
            assertEquals(gradientCircleText.getText(), "def");
            // Even with left justification, the text is rendered on the right side of the circle because SmartArt defines
            // a better visual placement for the textbox inside the txXfrm property.
            assertEquals(1, gradientCircleText.getTextParagraphs().size());
            XSLFTextParagraph paragraph = gradientCircleText.getTextParagraphs().get(0);
            assertEquals(TextAlign.LEFT, paragraph.getTextAlign());
            assertEquals(1, paragraph.getTextRuns().size());
            XSLFTextRun textRun = paragraph.getTextRuns().get(0);
            assertTrue(textRun.isBold());
            assertTrue(textRun.isItalic());

            // Shape 3 - Green Circle with theme color - "ghi" right aligned
            XSLFAutoShape greenCircle = (XSLFAutoShape) shapes.get(4);
            ColorStyle greenCircleColorStyle = ((PaintStyle.SolidPaint) greenCircle.getFillPaint()).getSolidColor();
            // The circle uses the yellow accent4 color but has HSL adjustments that make it green
            assertEquals(hexToColor(accent4Hex), greenCircleColorStyle.getColor());
            assertEquals(50004, greenCircleColorStyle.getAlpha()); // 50% transparency
            assertEquals(6533927, greenCircleColorStyle.getHueOff());
            assertEquals(6405, greenCircleColorStyle.getLumOff());
            assertEquals(-27185, greenCircleColorStyle.getSatOff());

            XSLFAutoShape greenCircleText = (XSLFAutoShape) shapes.get(5);
            assertEquals(greenCircleText.getText(), "ghi");
            assertEquals(TextAlign.RIGHT, greenCircleText.getTextParagraphs().get(0).getTextAlign());

            // Shape 4 - Circle with Picture Fill - no text
            XSLFSlide slide1 = inputPptx.getSlides().get(0);
            XSLFAutoShape pictureShape = (XSLFAutoShape) shapes.get(6);
            assertTrue(pictureShape.getText().isEmpty(), "text is empty?");
            XSLFTexturePaint texturePaint = (XSLFTexturePaint) pictureShape.getFillPaint();
            assertEquals(ContentTypes.IMAGE_JPEG, texturePaint.getContentType());
        }
    }
}