poi/src/scratchpad/testcases/org/apache/poi/hslf/usermodel/TestPictures.java

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   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
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   distributed under the License is distributed on an "AS IS" BASIS,
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package org.apache.poi.hslf.usermodel;

import org.apache.poi.hslf.*;
import org.apache.poi.hslf.blip.*;
import org.apache.poi.hslf.model.*;
import org.apache.poi.POIDataSamples;
import junit.framework.TestCase;

import java.io.*;
import java.util.Arrays;

/**
 * Test adding/reading pictures
 *
 * @author Yegor Kozlov
 */
public final class TestPictures extends TestCase{
    private static POIDataSamples slTests = POIDataSamples.getSlideShowInstance();

    //protected File cwd;

    /**
     * Test read/write Macintosh PICT
     */
    public void testPICT() throws Exception {
        SlideShow ppt = new SlideShow();

        Slide slide = ppt.createSlide();
        byte[] src_bytes = slTests.readFile("cow.pict");
        int idx = ppt.addPicture(src_bytes, Picture.PICT);
        Picture pict = new Picture(idx);
        assertEquals(idx, pict.getPictureIndex());
        slide.addShape(pict);

        //serialize and read again
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ppt.write(out);
        out.close();

        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));

        //make sure we can read this picture shape and it refers to the correct picture data
        Shape[] sh = ppt.getSlides()[0].getShapes();
        assertEquals(1, sh.length);
        pict = (Picture)sh[0];
        assertEquals(idx, pict.getPictureIndex());

        //check picture data
        PictureData[] pictures = ppt.getPictureData();
        //the Picture shape refers to the PictureData object in the Presentation
        assertEquals(pict.getPictureData(), pictures[0]);

        assertEquals(1, pictures.length);
        assertEquals(Picture.PICT, pictures[0].getType());
        assertTrue(pictures[0] instanceof PICT);
        //compare the content of the initial file with what is stored in the PictureData
        byte[] ppt_bytes = pictures[0].getData();
        assertEquals(src_bytes.length, ppt_bytes.length);
        //in PICT the first 512 bytes are MAC specific and may not be preserved, ignore them
        byte[] b1 = new byte[src_bytes.length-512];
        System.arraycopy(src_bytes, 512, b1, 0, b1.length);
        byte[] b2 = new byte[ppt_bytes.length-512];
        System.arraycopy(ppt_bytes, 512, b2, 0, b2.length);
        assertTrue(Arrays.equals(b1, b2));
    }

    /**
     * Test read/write WMF
     */
    public void testWMF() throws Exception {
        SlideShow ppt = new SlideShow();

        Slide slide = ppt.createSlide();
        byte[] src_bytes = slTests.readFile("santa.wmf");
        int idx = ppt.addPicture(src_bytes, Picture.WMF);
        Picture pict = new Picture(idx);
        assertEquals(idx, pict.getPictureIndex());
        slide.addShape(pict);

        //serialize and read again
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ppt.write(out);
        out.close();

        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));

        //make sure we can read this picture shape and it refers to the correct picture data
        Shape[] sh = ppt.getSlides()[0].getShapes();
        assertEquals(1, sh.length);
        pict = (Picture)sh[0];
        assertEquals(idx, pict.getPictureIndex());

        //check picture data
        PictureData[] pictures = ppt.getPictureData();
        //the Picture shape refers to the PictureData object in the Presentation
        assertEquals(pict.getPictureData(), pictures[0]);

        assertEquals(1, pictures.length);
        assertEquals(Picture.WMF, pictures[0].getType());
        assertTrue(pictures[0] instanceof WMF);
        //compare the content of the initial file with what is stored in the PictureData
        byte[] ppt_bytes = pictures[0].getData();
        assertEquals(src_bytes.length, ppt_bytes.length);
        //in WMF the first 22 bytes - is a metafile header
        byte[] b1 = new byte[src_bytes.length-22];
        System.arraycopy(src_bytes, 22, b1, 0, b1.length);
        byte[] b2 = new byte[ppt_bytes.length-22];
        System.arraycopy(ppt_bytes, 22, b2, 0, b2.length);
        assertTrue(Arrays.equals(b1, b2));
    }

    /**
     * Test read/write EMF
     */
    public void testEMF() throws Exception {
        SlideShow ppt = new SlideShow();

        Slide slide = ppt.createSlide();
        byte[] src_bytes = slTests.readFile("wrench.emf");
        int idx = ppt.addPicture(src_bytes, Picture.EMF);

        Picture pict = new Picture(idx);
        assertEquals(idx, pict.getPictureIndex());
        slide.addShape(pict);

        //serialize and read again
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ppt.write(out);
        out.close();

        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));

        //make sure we can get this picture shape and it refers to the correct picture data
        Shape[] sh = ppt.getSlides()[0].getShapes();
        assertEquals(1, sh.length);
        pict = (Picture)sh[0];
        assertEquals(idx, pict.getPictureIndex());

        //check picture data
        PictureData[] pictures = ppt.getPictureData();
        //the Picture shape refers to the PictureData object in the Presentation
        assertEquals(pict.getPictureData(), pictures[0]);

        assertEquals(1, pictures.length);
        assertEquals(Picture.EMF, pictures[0].getType());
        assertTrue(pictures[0] instanceof EMF);
        //compare the content of the initial file with what is stored in the PictureData
        byte[] ppt_bytes = pictures[0].getData();
        assertTrue(Arrays.equals(src_bytes, ppt_bytes));
    }

    /**
     * Test read/write PNG
     */
    public void testPNG() throws Exception {
        SlideShow ppt = new SlideShow();

        Slide slide = ppt.createSlide();
        byte[] src_bytes = slTests.readFile("tomcat.png");
        int idx = ppt.addPicture(src_bytes, Picture.PNG);
        Picture pict = new Picture(idx);
        assertEquals(idx, pict.getPictureIndex());
        slide.addShape(pict);

        //serialize and read again
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ppt.write(out);
        out.close();

        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));

        //make sure we can read this picture shape and it refers to the correct picture data
        Shape[] sh = ppt.getSlides()[0].getShapes();
        assertEquals(1, sh.length);
        pict = (Picture)sh[0];
        assertEquals(idx, pict.getPictureIndex());

        //check picture data
        PictureData[] pictures = ppt.getPictureData();
        //the Picture shape refers to the PictureData object in the Presentation
        assertEquals(pict.getPictureData(), pictures[0]);

        assertEquals(1, pictures.length);
        assertEquals(Picture.PNG, pictures[0].getType());
        assertTrue(pictures[0] instanceof PNG);
        //compare the content of the initial file with what is stored in the PictureData
        byte[] ppt_bytes = pictures[0].getData();
        assertTrue(Arrays.equals(src_bytes, ppt_bytes));
    }

    /**
     * Test read/write JPEG
     */
    public void testJPEG() throws Exception {
        SlideShow ppt = new SlideShow();

        Slide slide = ppt.createSlide();
        byte[] src_bytes = slTests.readFile("clock.jpg");
        int idx = ppt.addPicture(src_bytes, Picture.JPEG);

        Picture pict = new Picture(idx);
        assertEquals(idx, pict.getPictureIndex());
        slide.addShape(pict);

        //serialize and read again
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ppt.write(out);
        out.close();

        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));

        //make sure we can read this picture shape and it refers to the correct picture data
        Shape[] sh = ppt.getSlides()[0].getShapes();
        assertEquals(1, sh.length);
        pict = (Picture)sh[0];
        assertEquals(idx, pict.getPictureIndex());

        //check picture data
        PictureData[] pictures = ppt.getPictureData();
        //the Picture shape refers to the PictureData object in the Presentation
        assertEquals(pict.getPictureData(), pictures[0]);

        assertEquals(1, pictures.length);
        assertEquals(Picture.JPEG, pictures[0].getType());
        assertTrue(pictures[0] instanceof JPEG);
        //compare the content of the initial file with what is stored in the PictureData
        byte[] ppt_bytes = pictures[0].getData();
        assertTrue(Arrays.equals(src_bytes, ppt_bytes));
    }

    /**
     * Test read/write DIB
     */
    public void testDIB() throws Exception {
        SlideShow ppt = new SlideShow();

        Slide slide = ppt.createSlide();
        byte[] src_bytes = slTests.readFile("clock.dib");
        int idx = ppt.addPicture(src_bytes, Picture.DIB);
        Picture pict = new Picture(idx);
        assertEquals(idx, pict.getPictureIndex());
        slide.addShape(pict);

        //serialize and read again
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ppt.write(out);
        out.close();

        ppt = new SlideShow(new HSLFSlideShow(new ByteArrayInputStream(out.toByteArray())));

        //make sure we can read this picture shape and it refers to the correct picture data
        Shape[] sh = ppt.getSlides()[0].getShapes();
        assertEquals(1, sh.length);
        pict = (Picture)sh[0];
        assertEquals(idx, pict.getPictureIndex());

        //check picture data
        PictureData[] pictures = ppt.getPictureData();
        //the Picture shape refers to the PictureData object in the Presentation
        assertEquals(pict.getPictureData(), pictures[0]);

        assertEquals(1, pictures.length);
        assertEquals(Picture.DIB, pictures[0].getType());
        assertTrue(pictures[0] instanceof DIB);
        //compare the content of the initial file with what is stored in the PictureData
        byte[] ppt_bytes = pictures[0].getData();
        assertTrue(Arrays.equals(src_bytes, ppt_bytes));
    }

    /**
     * Read pictures in different formats from a reference slide show
     */
    public void testReadPictures() throws Exception {

        byte[] src_bytes, ppt_bytes, b1, b2;
        Picture pict;
        PictureData pdata;

        SlideShow ppt = new SlideShow(slTests.openResourceAsStream("pictures.ppt"));
        Slide[] slides = ppt.getSlides();
        PictureData[] pictures = ppt.getPictureData();
        assertEquals(5, pictures.length);

        pict = (Picture)slides[0].getShapes()[0]; //the first slide contains JPEG
        pdata = pict.getPictureData();
        assertTrue(pdata instanceof JPEG);
        assertEquals(Picture.JPEG, pdata.getType());
        src_bytes = pdata.getData();
        ppt_bytes = slTests.readFile("clock.jpg");
        assertTrue(Arrays.equals(src_bytes, ppt_bytes));

        pict = (Picture)slides[1].getShapes()[0]; //the second slide contains PNG
        pdata = pict.getPictureData();
        assertTrue(pdata instanceof PNG);
        assertEquals(Picture.PNG, pdata.getType());
        src_bytes = pdata.getData();
        ppt_bytes = slTests.readFile("tomcat.png");
        assertTrue(Arrays.equals(src_bytes, ppt_bytes));

        pict = (Picture)slides[2].getShapes()[0]; //the third slide contains WMF
        pdata = pict.getPictureData();
        assertTrue(pdata instanceof WMF);
        assertEquals(Picture.WMF, pdata.getType());
        src_bytes = pdata.getData();
        ppt_bytes = slTests.readFile("santa.wmf");
        assertEquals(src_bytes.length, ppt_bytes.length);
        //ignore the first 22 bytes - it is a WMF metafile header
        b1 = new byte[src_bytes.length-22];
        System.arraycopy(src_bytes, 22, b1, 0, b1.length);
        b2 = new byte[ppt_bytes.length-22];
        System.arraycopy(ppt_bytes, 22, b2, 0, b2.length);
        assertTrue(Arrays.equals(b1, b2));

        pict = (Picture)slides[3].getShapes()[0]; //the forth slide contains PICT
        pdata = pict.getPictureData();
        assertTrue(pdata instanceof PICT);
        assertEquals(Picture.PICT, pdata.getType());
        src_bytes = pdata.getData();
        ppt_bytes = slTests.readFile("cow.pict");
        assertEquals(src_bytes.length, ppt_bytes.length);
        //ignore the first 512 bytes - it is a MAC specific crap
        b1 = new byte[src_bytes.length-512];
        System.arraycopy(src_bytes, 512, b1, 0, b1.length);
        b2 = new byte[ppt_bytes.length-512];
        System.arraycopy(ppt_bytes, 512, b2, 0, b2.length);
        assertTrue(Arrays.equals(b1, b2));

        pict = (Picture)slides[4].getShapes()[0]; //the fifth slide contains EMF
        pdata = pict.getPictureData();
        assertTrue(pdata instanceof EMF);
        assertEquals(Picture.EMF, pdata.getType());
        src_bytes = pdata.getData();
        ppt_bytes = slTests.readFile("wrench.emf");
        assertTrue(Arrays.equals(src_bytes, ppt_bytes));

    }

	/**
	 * Test that on a party corrupt powerpoint document, which has
	 *  crazy pictures of type 0, we do our best.
	 */
	public void testZeroPictureType() throws Exception {
		HSLFSlideShow hslf = new HSLFSlideShow(slTests.openResourceAsStream("PictureTypeZero.ppt"));

		// Should still have 2 real pictures
		assertEquals(2, hslf.getPictures().length);
		// Both are real pictures, both WMF
		assertEquals(Picture.WMF, hslf.getPictures()[0].getType());
		assertEquals(Picture.WMF, hslf.getPictures()[1].getType());

		// Now test what happens when we use the SlideShow interface
		SlideShow ppt = new SlideShow(hslf);
        Slide[] slides = ppt.getSlides();
        PictureData[] pictures = ppt.getPictureData();
        assertEquals(12, slides.length);
        assertEquals(2, pictures.length);

		Picture pict;
		PictureData pdata;

        pict = (Picture)slides[0].getShapes()[1]; // 2nd object on 1st slide
        pdata = pict.getPictureData();
        assertTrue(pdata instanceof WMF);
        assertEquals(Picture.WMF, pdata.getType());

        pict = (Picture)slides[0].getShapes()[2]; // 3rd object on 1st slide
        pdata = pict.getPictureData();
        assertTrue(pdata instanceof WMF);
        assertEquals(Picture.WMF, pdata.getType());
	}

	public void testZeroPictureLength() throws Exception {
		HSLFSlideShow hslf = new HSLFSlideShow(slTests.openResourceAsStream("PictureLengthZero.ppt"));

		// Should still have 2 real pictures
		assertEquals(2, hslf.getPictures().length);
		// Both are real pictures, both WMF
		assertEquals(Picture.WMF, hslf.getPictures()[0].getType());
		assertEquals(Picture.WMF, hslf.getPictures()[1].getType());

		// Now test what happens when we use the SlideShow interface
		SlideShow ppt = new SlideShow(hslf);
        Slide[] slides = ppt.getSlides();
        PictureData[] pictures = ppt.getPictureData();
        assertEquals(27, slides.length);
        assertEquals(2, pictures.length);

		Picture pict;
		PictureData pdata;

        pict = (Picture)slides[6].getShapes()[13];
        pdata = pict.getPictureData();
        assertTrue(pdata instanceof WMF);
        assertEquals(Picture.WMF, pdata.getType());

        pict = (Picture)slides[7].getShapes()[13];
        pdata = pict.getPictureData();
        assertTrue(pdata instanceof WMF);
        assertEquals(Picture.WMF, pdata.getType());

        //add a new picture, it should be correctly appended to the Pictures stream
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        for(PictureData p : pictures) p.write(out);
        out.close();

        int streamSize = out.size();

        PictureData data = PictureData.create(Picture.JPEG);
        data.setData(new byte[100]);
        int offset = hslf.addPicture(data);
        assertEquals(streamSize, offset);
        assertEquals(3, ppt.getPictureData().length);

    }

    public void testGetPictureName() throws Exception {
        SlideShow ppt = new SlideShow(slTests.openResourceAsStream("ppt_with_png.ppt"));
        Slide slide = ppt.getSlides()[0];

        Picture p = (Picture)slide.getShapes()[0]; //the first slide contains JPEG
        assertEquals("test", p.getPictureName());
    }

    public void testSetPictureName() throws Exception {
        SlideShow ppt = new SlideShow();

        Slide slide = ppt.createSlide();
        byte[] img = slTests.readFile("tomcat.png");
        int idx = ppt.addPicture(img, Picture.PNG);
        Picture pict = new Picture(idx);
        pict.setPictureName("tomcat.png");
        slide.addShape(pict);

        //serialize and read again
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ppt.write(out);
        out.close();

        ppt = new SlideShow(new ByteArrayInputStream(out.toByteArray()));

        Picture p = (Picture)ppt.getSlides()[0].getShapes()[0];
        assertEquals("tomcat.png", p.getPictureName());
    }
}