Fix PdfName limit and tag structure version for pdf/a-4

DEVSIX-7803

Author: Dmitry Radchuk

pdfa/src/main/java/com/itextpdf/pdfa/PdfADocument.java

@@ -419,6 +419,9 @@ private static PdfVersion getPdfVersionForPdfA(PdfAConformanceLevel conformanceL
             case "3":
                 version = PdfVersion.PDF_1_7;
                 break;
+            case "4":
+                version = PdfVersion.PDF_2_0;
+                break;
             default:
                 version = PdfVersion.PDF_1_4;
                 break;

pdfa/src/main/java/com/itextpdf/pdfa/checker/PdfA4Checker.java

@@ -561,6 +561,13 @@ protected void checkBlendMode(PdfName blendMode) {
         }
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    protected int getMaxNameLength() {
+        return Integer.MAX_VALUE;
+    }
+
     private static boolean isValidXmpConformance(String value) {
         if (value == null) {
             return false;

pdfa/src/test/java/com/itextpdf/pdfa/PdfA4CatalogCheckTest.java

@@ -23,7 +23,9 @@ This file is part of the iText (R) project.
 package com.itextpdf.pdfa;
 
 import com.itextpdf.commons.utils.MessageFormatUtil;
+import com.itextpdf.kernel.colors.ColorConstants;
 import com.itextpdf.kernel.font.PdfFont;
+import com.itextpdf.kernel.font.PdfFontFactory;
 import com.itextpdf.kernel.geom.Rectangle;
 import com.itextpdf.kernel.pdf.EncryptionConstants;
 import com.itextpdf.kernel.pdf.PdfAConformanceLevel;
@@ -34,6 +36,7 @@ This file is part of the iText (R) project.
 import com.itextpdf.kernel.pdf.PdfName;
 import com.itextpdf.kernel.pdf.PdfNumber;
 import com.itextpdf.kernel.pdf.PdfOutputIntent;
+import com.itextpdf.kernel.pdf.PdfPage;
 import com.itextpdf.kernel.pdf.PdfReader;
 import com.itextpdf.kernel.pdf.PdfStream;
 import com.itextpdf.kernel.pdf.PdfString;
@@ -44,6 +47,11 @@ This file is part of the iText (R) project.
 import com.itextpdf.kernel.pdf.xobject.PdfFormXObject;
 import com.itextpdf.kernel.pdf.xobject.PdfTransparencyGroup;
 import com.itextpdf.kernel.utils.CompareTool;
+import com.itextpdf.layout.Document;
+import com.itextpdf.layout.element.Div;
+import com.itextpdf.layout.element.List;
+import com.itextpdf.layout.element.ListItem;
+import com.itextpdf.layout.properties.ListNumberingType;
 import com.itextpdf.pdfa.exceptions.PdfAConformanceException;
 import com.itextpdf.pdfa.exceptions.PdfaExceptionMessageConstant;
 import com.itextpdf.test.ExtendedITextTest;
@@ -85,6 +93,29 @@ public void createSimpleDocTest() throws IOException {
         Assert.assertNull(new VeraPdfValidator().validate(outPdf)); // Android-Conversion-Skip-Line (TODO DEVSIX-7377 introduce pdf\a validation on Android)
     }
 
+    @Test
+    public void createSimpleTaggedDocTest() throws IOException, InterruptedException {
+        String outPdf = destinationFolder + "pdfA4_tagged.pdf";
+        String cmpPdf = sourceFolder + "cmp/PdfA4CatalogCheckTest/cmp_pdfA4_tagged.pdf";
+
+        PdfWriter writer = new PdfWriter(outPdf, new WriterProperties().setPdfVersion(PdfVersion.PDF_2_0));
+        InputStream is = new FileInputStream(sourceFolder + "sRGB Color Space Profile.icm");
+        PdfADocument pdfDoc = (PdfADocument) new PdfADocument(writer, PdfAConformanceLevel.PDF_A_4, new PdfOutputIntent("Custom", "", "http://www.color.org", "sRGB IEC61966-2.1", is)).setTagged();
+        PdfFont font = PdfFontFactory.createFont(sourceFolder + "FreeSans.ttf",
+                "WinAnsi", PdfFontFactory.EmbeddingStrategy.FORCE_EMBEDDED);
+        Document document = new Document(pdfDoc);
+        document.setFont(font);
+        List list = new List();
+        list.add("123");
+
+        document.add(list);
+        Assert.assertEquals(PdfVersion.PDF_2_0, pdfDoc.getTagStructureContext().getTagStructureTargetVersion());
+        document.close();
+
+        Assert.assertNull(new CompareTool().compareByContent(outPdf, cmpPdf, destinationFolder, "diff"));
+        Assert.assertNull(new VeraPdfValidator().validate(outPdf)); // Android-Conversion-Skip-Line (TODO DEVSIX-7377 introduce pdf\a validation on Android)
+    }
+
     @Test
     public void invalidCatalogVersionCheckTest() throws IOException {
         String outPdf = destinationFolder + "pdfA4_catalogCheck02.pdf";

pdfa/src/test/java/com/itextpdf/pdfa/checker/PdfA4ImplementationLimitsTest.java

@@ -47,6 +47,7 @@ This file is part of the iText (R) project.
 
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 @Category(UnitTest.class)
@@ -99,6 +100,12 @@ public void deviceNColorspaceWithMoreThan32Components() {
         pdfA4Checker.checkColorSpace(buildDeviceNColorspace(40), null, currentColorSpaces, true, false);
     }
 
+    @Test
+    public void longPdfNameTest() {
+        //exception shall not be thrown as pdf/a-4 supports greater than 127 characters pdf names
+        pdfA4Checker.checkPdfObject(PdfACheckerTestUtils.getLongName(200));
+    }
+
     private PdfColorSpace buildDeviceNColorspace(int numberOfComponents) {
         List<String> tmpArray = new ArrayList<String>(numberOfComponents);
         float[] transformArray = new float[numberOfComponents * 2];