Serge NOEL
131 lines
4.9 KiB
Java
131 lines
4.9 KiB
Java
package jmri;
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import java.io.*;
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import java.nio.file.FileSystems;
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import java.nio.file.Files;
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import java.util.*;
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import javax.imageio.ImageIO;
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import javax.imageio.ImageReader;
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import javax.imageio.metadata.IIOMetadata;
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import javax.imageio.spi.ImageReaderSpi;
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import javax.imageio.stream.ImageInputStream;
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import jmri.util.JUnitUtil;
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import org.junit.jupiter.api.*;
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import org.w3c.dom.Node;
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import org.w3c.dom.NodeList;
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/**
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* Checks that all the GIF images in the JMRI distribution either has:
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* * only one frame and not the Netscape extension
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* * or more than one frame and the Netscape extension
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*
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* @author Daniel Bergqvist (C) 2022
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*/
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public class CheckNetscapeExtensionTest {
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private static final Set<String> IMAGES_TO_IGNORE = new HashSet<>();
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// Does this image has the Netscape extension?
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private boolean hasNetscapeExtension(ImageReader gifReader) throws IOException {
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IIOMetadata metaData = gifReader.getImageMetadata(0);
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Node tree = metaData.getAsTree("javax_imageio_gif_image_1.0");
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// Try to find the node "ApplicationExtensions"
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Node applicationExtensions = null;
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NodeList nodeList = tree.getChildNodes();
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for (int child=0; child < nodeList.getLength(); child++) {
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var tstNode = nodeList.item(child);
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if ( tstNode !=null && tstNode.getNodeName().equals("ApplicationExtensions")) {
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applicationExtensions = tstNode;
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}
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}
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if (applicationExtensions == null) return false;
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// Loop thru the extensions to try to find the "NETSCAPE" extension
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nodeList = applicationExtensions.getChildNodes();
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for (int child=0; child < nodeList.getLength(); child++) {
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var tstNode = nodeList.item(child);
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if ( tstNode != null && tstNode.getNodeName().equals("ApplicationExtension")) {
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org.w3c.dom.NamedNodeMap map = tstNode.getAttributes();
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if ( map != null ) {
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for (int i=0; i < map.getLength(); i++) {
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var mapItem = map.item(i);
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if ( mapItem != null && mapItem.getNodeName().equals("applicationID")
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&& "NETSCAPE".equals(mapItem.getNodeValue())) {
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return true;
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}
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}
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}
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}
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}
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// The Netscape extension is not found
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return false;
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}
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private void checkFileForNetscapeExtension(File file) throws IOException {
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Iterator<ImageReader> rIter = ImageIO.getImageReadersByFormatName("gif");
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ImageReader gifReader = rIter.next();
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try (InputStream is = file.toURI().toURL().openStream()) {
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ImageInputStream iis = ImageIO.createImageInputStream(is);
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gifReader.setInput(iis, false);
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ImageReaderSpi spiProv = gifReader.getOriginatingProvider();
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if (spiProv != null && spiProv.canDecodeInput(iis)) {
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int numFrames = gifReader.getNumImages(true);
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boolean hasNetscapeExtension = hasNetscapeExtension(gifReader);
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if (numFrames == 1 && hasNetscapeExtension) {
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log.error("GIF image {} has one frame and the Netscape extension", file.getAbsolutePath());
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}
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if (numFrames > 1 && !hasNetscapeExtension) {
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log.error("GIF image {} has more than one frame and not the Netscape extension", file.getAbsolutePath());
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}
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}
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}
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}
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@Test
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public void testGifFiles() throws IOException {
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java.nio.file.Path path = FileSystems.getDefault().getPath("resources/");
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List<File> files = new ArrayList<>();
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Files.walk(path)
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.filter(Files::isRegularFile)
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.filter(p -> p.getFileName().toString().toLowerCase().endsWith(".gif"))
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.forEach(p -> { files.add(p.toFile()); });
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for (File file : files) {
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if (! IMAGES_TO_IGNORE.contains(file.getAbsolutePath())) {
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checkFileForNetscapeExtension(file);
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} else {
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log.info("Ignore image {}", file.getAbsolutePath());
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}
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}
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}
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// The minimal setup for log4J
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@BeforeEach
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public void setUp() throws IOException {
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JUnitUtil.setUp();
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JUnitUtil.resetInstanceManager();
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JUnitUtil.resetProfileManager();
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JUnitUtil.initConfigureManager();
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IMAGES_TO_IGNORE.add(FileSystems.getDefault().getPath("resources/icons/RGB-animated-once-Square.gif").toFile().getAbsolutePath());
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IMAGES_TO_IGNORE.add(FileSystems.getDefault().getPath("resources/icons/RGB-animated-once-Square2.gif").toFile().getAbsolutePath());
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}
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@AfterEach
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public void tearDown() {
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JUnitUtil.tearDown();
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}
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private static final org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(CheckNetscapeExtensionTest.class);
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}
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