Bugzilla #53902: Added possibility to define 'header' table columns (the same way as fo:table-header allows to define header rows).

When accessibility is enabled, this allows to set the appropriate Scope attribute on the corresponding TH cells.


git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1390412 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/fop/accessibility/fo/StructureTreeEventTrigger.java

@@ -20,6 +20,7 @@
 package org.apache.fop.accessibility.fo;
 
 import java.util.Locale;
+import java.util.Stack;
 
 import org.xml.sax.SAXException;
 import org.xml.sax.helpers.AttributesImpl;
@@ -30,6 +31,7 @@ import org.apache.fop.fo.FOEventHandler;
 import org.apache.fop.fo.FONode;
 import org.apache.fop.fo.FOText;
 import org.apache.fop.fo.extensions.ExtensionElementMapping;
+import org.apache.fop.fo.extensions.InternalElementMapping;
 import org.apache.fop.fo.flow.AbstractGraphics;
 import org.apache.fop.fo.flow.BasicLink;
 import org.apache.fop.fo.flow.Block;
@@ -70,6 +72,10 @@ class StructureTreeEventTrigger extends FOEventHandler {
 
     private LayoutMasterSet layoutMasterSet;
 
+    private final Stack<Table> tables = new Stack<Table>();
+
+    private final Stack<Boolean> inTableHeader = new Stack<Boolean>();
+
     public StructureTreeEventTrigger(StructureTreeEventHandler structureTreeEventHandler) {
         this.structureTreeEventHandler = structureTreeEventHandler;
     }
@@ -195,42 +201,51 @@ class StructureTreeEventTrigger extends FOEventHandler {
 
     @Override
     public void startTable(Table tbl) {
+        tables.push(tbl);
         startElement(tbl);
     }
 
     @Override
     public void endTable(Table tbl) {
         endElement(tbl);
+        tables.pop();
     }
 
     @Override
     public void startHeader(TableHeader header) {
+        inTableHeader.push(Boolean.TRUE);
         startElement(header);
     }
 
     @Override
     public void endHeader(TableHeader header) {
         endElement(header);
+        inTableHeader.pop();
     }
 
     @Override
     public void startFooter(TableFooter footer) {
+        // TODO Shouldn't it be true?
+        inTableHeader.push(Boolean.FALSE);
         startElement(footer);
     }
 
     @Override
     public void endFooter(TableFooter footer) {
         endElement(footer);
+        inTableHeader.pop();
     }
 
     @Override
     public void startBody(TableBody body) {
+        inTableHeader.push(Boolean.FALSE);
         startElement(body);
     }
 
     @Override
     public void endBody(TableBody body) {
         endElement(body);
+        inTableHeader.pop();
     }
 
     @Override
@@ -248,6 +263,24 @@ class StructureTreeEventTrigger extends FOEventHandler {
         AttributesImpl attributes = new AttributesImpl();
         addSpanAttribute(attributes, "number-columns-spanned", tc.getNumberColumnsSpanned());
         addSpanAttribute(attributes, "number-rows-spanned", tc.getNumberRowsSpanned());
+        boolean rowHeader = inTableHeader.peek();
+        boolean columnHeader = tables.peek().getColumn(tc.getColumnNumber() - 1).isHeader();
+        if (rowHeader || columnHeader) {
+            final String th = "TH";
+            String role = tc.getCommonAccessibility().getRole();
+            /* Do not override a custom role */
+            if (role == null) {
+                role = th;
+                addNoNamespaceAttribute(attributes, "role", th);
+            }
+            if (role.equals(th)) {
+                if (columnHeader) {
+                    String scope = rowHeader ? "Both" : "Row";
+                    addAttribute(attributes, InternalElementMapping.URI, InternalElementMapping.SCOPE,
+                            InternalElementMapping.STANDARD_PREFIX, scope);
+                }
+            }
+        }
         startElement(tc, attributes);
     }
 

src/java/org/apache/fop/fo/Constants.java

@@ -785,8 +785,11 @@ public interface Constants {
      */
     int PR_X_NUMBER_CONVERSION_FEATURES = 276;
 
+    /** Scope for table header */
+    int PR_X_HEADER_COLUMN = 277;
+
     /** Number of property constants defined */
-    int PROPERTY_COUNT = 276;
+    int PROPERTY_COUNT = 277;
 
     // compound property constants
 

src/java/org/apache/fop/fo/FOPropertyMapping.java

@@ -2513,6 +2513,12 @@ public final class FOPropertyMapping implements Constants {
         m.setInherited(false);
         m.setDefault("false");
         addPropertyMaker("table-omit-header-at-break", m);
+
+        // fox:scope
+        m = new EnumProperty.Maker(PR_X_HEADER_COLUMN);
+        m.useGeneric(genericBoolean);
+        m.setDefault("false");
+        addPropertyMaker("fox:header", m);
     }
 
     private void createWritingModeProperties() {

src/java/org/apache/fop/fo/extensions/ExtensionElementMapping.java

@@ -52,6 +52,7 @@ public class ExtensionElementMapping extends ElementMapping {
         PROPERTY_ATTRIBUTES.add("disable-column-balancing");
         //These are FOP's extension properties for accessibility
         PROPERTY_ATTRIBUTES.add("alt-text");
+        PROPERTY_ATTRIBUTES.add("header");
     }
 
     /**

src/java/org/apache/fop/fo/extensions/InternalElementMapping.java

@@ -43,12 +43,15 @@ public class InternalElementMapping extends ElementMapping {
     /** The "struct-ref" attribute, to refer to a structure tree element. */
     public static final String STRUCT_REF = "struct-ref";
 
+    public static final String SCOPE = "scope";
+
     private static final Set<String> PROPERTY_ATTRIBUTES = new java.util.HashSet<String>();
 
     static {
         //These are FOP's extension properties for accessibility
         PROPERTY_ATTRIBUTES.add(STRUCT_ID);
         PROPERTY_ATTRIBUTES.add(STRUCT_REF);
+        PROPERTY_ATTRIBUTES.add(SCOPE);
     }
 
     /**

src/java/org/apache/fop/fo/flow/table/TableColumn.java

@@ -24,6 +24,7 @@ import org.xml.sax.Locator;
 
 import org.apache.fop.apps.FOPException;
 import org.apache.fop.datatypes.Length;
+import org.apache.fop.fo.Constants;
 import org.apache.fop.fo.FONode;
 import org.apache.fop.fo.PropertyList;
 import org.apache.fop.fo.ValidationException;
@@ -44,6 +45,7 @@ public class TableColumn extends TableFObj {
     private Length columnWidth;
     private int numberColumnsRepeated;
     private int numberColumnsSpanned;
+    private boolean isHeader;
     // Unused but valid items, commented out for performance:
     //     private int visibility;
     // End of property values
@@ -120,6 +122,7 @@ public class TableColumn extends TableFObj {
         if (!this.implicitColumn) {
             this.pList = pList;
         }
+        isHeader = (pList.get(Constants.PR_X_HEADER_COLUMN).getEnum() == Constants.EN_TRUE);
     }
 
     /** {@inheritDoc} */
@@ -263,4 +266,13 @@ public class TableColumn extends TableFObj {
         this.pList = null;
     }
 
+    /**
+     * Returns {@code true} if this column is made of header cells.
+     *
+     * @return {@code true} if cells in this column are like TH cells in HTML
+     */
+    public boolean isHeader() {
+        return isHeader;
+    }
+
 }

src/java/org/apache/fop/render/pdf/PDFStructureTreeBuilder.java

@@ -30,6 +30,7 @@ import org.apache.fop.accessibility.StructureTreeElement;
 import org.apache.fop.accessibility.StructureTreeEventHandler;
 import org.apache.fop.events.EventBroadcaster;
 import org.apache.fop.fo.extensions.ExtensionElementMapping;
+import org.apache.fop.fo.extensions.InternalElementMapping;
 import org.apache.fop.fo.pagination.Flow;
 import org.apache.fop.pdf.PDFFactory;
 import org.apache.fop.pdf.PDFParentTree;
@@ -138,7 +139,7 @@ class PDFStructureTreeBuilder implements StructureTreeEventHandler {
             PDFStructElem structElem = createStructureElement(parent, structureType);
             setAttributes(structElem, attributes);
             addKidToParent(structElem, parent, attributes);
-            registerStructureElement(structElem, pdfFactory);
+            registerStructureElement(structElem, pdfFactory, attributes);
             return structElem;
         }
 
@@ -155,7 +156,8 @@ class PDFStructureTreeBuilder implements StructureTreeEventHandler {
             parent.addKid(kid);
         }
 
-        protected void registerStructureElement(PDFStructElem structureElement, PDFFactory pdfFactory) {
+        protected void registerStructureElement(PDFStructElem structureElement, PDFFactory pdfFactory,
+                Attributes attributes) {
             pdfFactory.getDocument().registerStructureElement(structureElement);
         }
 
@@ -240,22 +242,15 @@ class PDFStructureTreeBuilder implements StructureTreeEventHandler {
         }
 
         @Override
-        protected PDFStructElem createStructureElement(StructureHierarchyMember parent,
-                StructureType structureType) {
-            PDFStructElem grandParent = ((PDFStructElem) parent).getParentStructElem();
-            //TODO What to do with cells from table-footer? Currently they are mapped on TD.
-            if (grandParent.getStructureType() == StandardStructureTypes.Table.THEAD) {
-                structureType = StandardStructureTypes.Table.TH;
-            } else {
-                structureType = StandardStructureTypes.Table.TD;
-            }
-            return super.createStructureElement(parent, structureType);
-        }
-
-        @Override
-        protected void registerStructureElement(PDFStructElem structureElement, PDFFactory pdfFactory) {
+        protected void registerStructureElement(PDFStructElem structureElement, PDFFactory pdfFactory,
+                Attributes attributes) {
             if (structureElement.getStructureType() == Table.TH) {
-                pdfFactory.getDocument().registerStructureElement(structureElement, Scope.COLUMN);
+                String scopeAttribute = attributes.getValue(InternalElementMapping.URI,
+                        InternalElementMapping.SCOPE);
+                Scope scope = (scopeAttribute == null)
+                        ? Scope.COLUMN
+                        : Scope.valueOf(scopeAttribute.toUpperCase(Locale.ENGLISH));
+                pdfFactory.getDocument().registerStructureElement(structureElement, scope);
             } else {
                 pdfFactory.getDocument().registerStructureElement(structureElement);
             }

status.xml

@@ -62,6 +62,11 @@
       documents. Example: the fix of marks layering will be such a case when it's done.
     -->
     <release version="FOP Trunk" date="TBD">
+      <action context="Renderers" dev="VH" type="add" fixes-bug="53902">
+        Added possibility to define ‘header’ table columns (the same way as fo:table-header allows 
+        to define header rows). When accessibility is enabled, this allows to set the appropriate 
+        Scope attribute on the corresponding TH cells.
+      </action>
       <action context="Fonts" dev="MH" type="add" fixes-bug="53868" importance="low" due-to="Luis Bernardo">
         Full font embedding in PDF
       </action>

test/java/org/apache/fop/accessibility/fo/FO2StructureTreeConverterTestCase.java

@@ -91,6 +91,11 @@ public class FO2StructureTreeConverterTestCase {
         testConverter("/org/apache/fop/fo/pagination/side-regions.fo");
     }
 
+    @Test
+    public void headerTableCellMustPropagateScope() throws Exception {
+        testConverter("table-header_scope.fo");
+    }
+
     private static InputStream getResource(String name) {
         return FO2StructureTreeConverterTestCase.class.getResourceAsStream(name);
     }

test/java/org/apache/fop/accessibility/fo/fo2StructureTree.xsl

@@ -21,7 +21,7 @@
   xmlns:fox="http://xmlgraphics.apache.org/fop/extensions"
   xmlns:foi="http://xmlgraphics.apache.org/fop/internal">
 
-  <xsl:output method="xml" indent="no"/>
+  <xsl:output method="xml" indent="yes"/>
 
   <xsl:template name="copy">
     <xsl:copy>
@@ -92,10 +92,37 @@
     <xsl:call-template name="copy"/>
   </xsl:template>
 
-  <xsl:template match="fo:table|fo:table-header|fo:table-footer|fo:table-body|fo:table-row|fo:table-cell">
+  <xsl:template match="fo:table|fo:table-header|fo:table-footer|fo:table-body|fo:table-row">
     <xsl:call-template name="copy"/>
   </xsl:template>
 
+  <xsl:template name="get.column.header">
+    <xsl:value-of select="ancestor::fo:table/fo:table-column[
+      count(preceding-sibling::fo:table-column) = count(current()/preceding-sibling::fo:table-cell)]/@fox:header"/>
+  </xsl:template>
+
+  <xsl:template match="fo:table-cell">
+    <xsl:variable name="header"><xsl:call-template name="get.column.header"/></xsl:variable>
+    <xsl:copy>
+      <xsl:if test="$header = 'true'">
+        <xsl:attribute name="role">TH</xsl:attribute>
+        <xsl:attribute name="scope" namespace="http://xmlgraphics.apache.org/fop/internal">Row</xsl:attribute>
+      </xsl:if>
+      <xsl:apply-templates select="@*|node()"/>
+    </xsl:copy>
+  </xsl:template>
+
+  <xsl:template match="fo:table-header/fo:table-cell|fo:table-header/fo:table-row/fo:table-cell">
+    <xsl:variable name="header"><xsl:call-template name="get.column.header"/></xsl:variable>
+    <xsl:copy>
+      <xsl:attribute name="role">TH</xsl:attribute>
+      <xsl:if test="$header = 'true'">
+        <xsl:attribute name="scope" namespace="http://xmlgraphics.apache.org/fop/internal">Both</xsl:attribute>
+      </xsl:if>
+      <xsl:apply-templates select="@*|node()"/>
+    </xsl:copy>
+  </xsl:template>
+
   <!-- Formatting Objects for Lists -->
   <xsl:template match="fo:list-block|fo:list-item|fo:list-item-label|fo:list-item-body">
     <xsl:call-template name="copy"/>

test/java/org/apache/fop/accessibility/fo/table-header_scope.fo

@@ -0,0 +1,57 @@
+<?xml version="1.0" standalone="no"?>
+<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format"
+  xmlns:fox="http://xmlgraphics.apache.org/fop/extensions"
+  font-family="sans-serif">
+  <fo:layout-master-set>
+    <fo:simple-page-master master-name="page"
+      page-height="120pt" page-width="220pt" margin="10pt">
+      <fo:region-body display-align="center"/>
+    </fo:simple-page-master>
+  </fo:layout-master-set>
+  <fo:page-sequence master-reference="page">
+    <fo:flow flow-name="xsl-region-body" line-height="10pt" font-size="8pt">
+      <fo:table width="100%" table-layout="fixed">
+        <fo:table-column fox:header="true" column-width="proportional-column-width(1)"/>
+        <fo:table-column column-width="proportional-column-width(1)"/>
+        <fo:table-column column-width="proportional-column-width(1)"/>
+        <fo:table-header font-weight="bold">
+          <fo:table-row>
+            <fo:table-cell border="1pt solid black" padding-left="1pt">
+              <fo:block>Table Header</fo:block>
+            </fo:table-cell>
+            <fo:table-cell border="1pt solid black" padding-left="1pt">
+              <fo:block>Column 1</fo:block>
+            </fo:table-cell>
+            <fo:table-cell border="1pt solid black" padding-left="1pt">
+              <fo:block>Column 2</fo:block>
+            </fo:table-cell>
+          </fo:table-row>
+        </fo:table-header>
+        <fo:table-body>
+          <fo:table-row>
+            <fo:table-cell id="Row1" border="1pt solid black" padding-left="1pt" font-weight="bold">
+              <fo:block>Row 1</fo:block>
+            </fo:table-cell>
+            <fo:table-cell border="1pt solid black" padding-left="1pt">
+              <fo:block>Cell 1.1</fo:block>
+            </fo:table-cell>
+            <fo:table-cell border="1pt solid black" padding-left="1pt">
+              <fo:block>Cell 1.2</fo:block>
+            </fo:table-cell>
+          </fo:table-row>
+          <fo:table-row>
+            <fo:table-cell border="1pt solid black" padding-left="1pt" font-weight="bold" role="TH">
+              <fo:block>Row 2</fo:block>
+            </fo:table-cell>
+            <fo:table-cell border="1pt solid black" padding-left="1pt">
+              <fo:block>Cell 2.1</fo:block>
+            </fo:table-cell>
+            <fo:table-cell border="1pt solid black" padding-left="1pt">
+              <fo:block>Cell 2.2</fo:block>
+            </fo:table-cell>
+          </fo:table-row>
+        </fo:table-body>
+      </fo:table>
+    </fo:flow>
+  </fo:page-sequence>
+</fo:root>

test/java/org/apache/fop/fo/FONodeMocks.java

@@ -19,19 +19,22 @@
 
 package org.apache.fop.fo;
 
+import java.io.IOException;
+
 import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.anyString;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
-import java.io.IOException;
-
 import org.apache.xmlgraphics.image.loader.ImageException;
 import org.apache.xmlgraphics.image.loader.ImageManager;
 import org.apache.xmlgraphics.image.loader.ImageSessionContext;
 
 import org.apache.fop.apps.FOUserAgent;
 import org.apache.fop.apps.FopFactory;
+import org.apache.fop.events.EventBroadcaster;
+import org.apache.fop.fo.flow.table.ColumnNumberManager;
+import org.apache.fop.fo.flow.table.ColumnNumberManagerHolder;
 
 /**
  * A helper class for creating mocks of {@link FONode} and its descendants.
@@ -51,27 +54,36 @@ public final class FONodeMocks {
     public static FONode mockFONode() {
         FONode mockFONode = mock(FONode.class);
         mockGetFOEventHandler(mockFONode);
+        mockGetImageManager(mockFONode.getFOEventHandler().getUserAgent());
         return mockFONode;
     }
 
-    private static void mockGetFOEventHandler(FONode mockFONode) {
+    public static FOEventHandler mockGetFOEventHandler(FONode mockFONode) {
         FOEventHandler mockFOEventHandler = mock(FOEventHandler.class);
         mockGetUserAgent(mockFOEventHandler);
         when(mockFONode.getFOEventHandler()).thenReturn(mockFOEventHandler);
+        return mockFOEventHandler;
     }
 
-    private static void mockGetUserAgent(FOEventHandler mockFOEventHandler) {
+    public static FOUserAgent mockGetUserAgent(FOEventHandler mockFOEventHandler) {
         FOUserAgent mockFOUserAgent = mock(FOUserAgent.class);
-        mockGetImageManager(mockFOUserAgent);
         when(mockFOEventHandler.getUserAgent()).thenReturn(mockFOUserAgent);
+        return mockFOUserAgent;
     }
 
-    private static void mockGetImageManager(FOUserAgent mockFOUserAgent) {
+    public static EventBroadcaster mockGetEventBroadcaster(FOUserAgent mockFOUserAgent) {
+        EventBroadcaster mockBroadcaster = mock(EventBroadcaster.class);
+        when(mockFOUserAgent.getEventBroadcaster()).thenReturn(mockBroadcaster);
+        return mockBroadcaster;
+    }
+
+    public static ImageManager mockGetImageManager(FOUserAgent mockFOUserAgent) {
         try {
             ImageManager mockImageManager = mock(ImageManager.class);
             when(mockImageManager.getImageInfo(anyString(), any(ImageSessionContext.class)))
                     .thenReturn(null);
             when(mockFOUserAgent.getImageManager()).thenReturn(mockImageManager);
+            return mockImageManager;
         } catch (ImageException e) {
             throw new RuntimeException(e);
         } catch (IOException e) {
@@ -79,4 +91,10 @@ public final class FONodeMocks {
         }
     }
 
+    public static ColumnNumberManager mockGetColumnNumberManager(ColumnNumberManagerHolder mock) {
+        ColumnNumberManager mockColumnNumberManager = mock(ColumnNumberManager.class);
+        when(mock.getColumnNumberManager()).thenReturn(mockColumnNumberManager);
+        return mockColumnNumberManager;
+    }
+
 }

test/java/org/apache/fop/fo/flow/table/HeaderColumnTestCase.java

@@ -0,0 +1,112 @@
+/*
+ * 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.
+ */
+
+/* $Id$ */
+
+package org.apache.fop.fo.flow.table;
+
+import org.junit.Test;
+import org.xml.sax.Attributes;
+import org.xml.sax.Locator;
+import org.xml.sax.helpers.AttributesImpl;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.anyString;
+import static org.mockito.Matchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import org.apache.fop.apps.FOUserAgent;
+import org.apache.fop.events.EventBroadcaster;
+import org.apache.fop.fo.ElementMappingRegistry;
+import org.apache.fop.fo.FOEventHandler;
+import org.apache.fop.fo.FONodeMocks;
+import org.apache.fop.fo.FOValidationEventProducer;
+import org.apache.fop.fo.PropertyList;
+import org.apache.fop.fo.StaticPropertyList;
+import org.apache.fop.fo.ValidationException;
+import org.apache.fop.fo.expr.PropertyException;
+import org.apache.fop.fo.extensions.ExtensionElementMapping;
+import org.apache.fop.util.XMLUtil;
+
+/**
+ * Tests that the fox:header property is correctly parsed and set up at the FO tree level.
+ */
+public class HeaderColumnTestCase {
+
+    @Test
+    public void testWrongValue() throws ValidationException {
+        Table parent = createTableParent();
+        EventBroadcaster mockEventBroadcaster = FONodeMocks.mockGetEventBroadcaster(
+                parent.getFOEventHandler().getUserAgent());
+        FOValidationEventProducer eventProducer = mockGetEventProducerFor(mockEventBroadcaster);
+        TableColumn column = new TableColumn(parent);
+        PropertyList propertyList = new StaticPropertyList(column, null);
+        Attributes atts = createScopeAttribute("blah");
+        propertyList.addAttributesToList(atts);
+        verify(eventProducer).invalidPropertyValue(any(), eq("fo:table-column"),
+                eq("fox:header"), eq("blah"), any(PropertyException.class), any(Locator.class));
+    }
+
+    @Test
+    public void testCorrectValue() throws Exception {
+        testCorrectValue(true);
+        testCorrectValue(false);
+    }
+
+    private void testCorrectValue(boolean expectedValue) throws Exception {
+        Table parent = createTableParent();
+        FONodeMocks.mockGetColumnNumberManager(parent);
+        TableColumn column = new TableColumn(parent, true);
+        PropertyList propertyList = new StaticPropertyList(column, null);
+        Attributes atts = createScopeAttribute(String.valueOf(expectedValue));
+        propertyList.addAttributesToList(atts);
+        column.bind(propertyList);
+        assertEquals(expectedValue, column.isHeader());
+    }
+
+    private Table createTableParent() {
+        Table parent = mock(Table.class);
+        FOEventHandler mockFOEventHandler = FONodeMocks.mockGetFOEventHandler(parent);
+        FOUserAgent mockUserAgent = mockFOEventHandler.getUserAgent();
+        mockGetElementMappingRegistry(mockUserAgent);
+        return parent;
+    }
+
+    private Attributes createScopeAttribute(String value) {
+        AttributesImpl atts = new AttributesImpl();
+        atts.addAttribute(ExtensionElementMapping.URI, "header", "fox:header", XMLUtil.CDATA, value);
+        return atts;
+    }
+
+    private ElementMappingRegistry mockGetElementMappingRegistry(FOUserAgent mockUserAgent) {
+        ElementMappingRegistry mockRegistry = mock(ElementMappingRegistry.class);
+        when(mockRegistry.getElementMapping(anyString())).thenReturn(new ExtensionElementMapping());
+        when(mockUserAgent.getElementMappingRegistry()).thenReturn(mockRegistry);
+        return mockRegistry;
+    }
+
+    private FOValidationEventProducer mockGetEventProducerFor(EventBroadcaster mockEventBroadcaster) {
+        FOValidationEventProducer mockEventProducer = mock(FOValidationEventProducer.class);
+        when(mockEventBroadcaster.getEventProducerFor(eq(FOValidationEventProducer.class)))
+                .thenReturn(mockEventProducer);
+        return mockEventProducer;
+    }
+
+}

test/pdf/accessibility/th_scope.fo

@@ -0,0 +1,68 @@
+<?xml version="1.0" standalone="no"?>
+<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format"
+  xmlns:fox="http://xmlgraphics.apache.org/fop/extensions"
+  font-family="sans-serif">
+  <fo:layout-master-set>
+    <fo:simple-page-master master-name="page"
+      page-height="120pt" page-width="220pt" margin="10pt">
+      <fo:region-body display-align="center"/>
+    </fo:simple-page-master>
+  </fo:layout-master-set>
+  <fo:page-sequence master-reference="page">
+    <fo:flow flow-name="xsl-region-body" line-height="10pt" font-size="8pt">
+      <fo:table width="100%" table-layout="fixed">
+        <fo:table-column fox:header="true" column-width="proportional-column-width(1)"/>
+        <fo:table-column column-width="proportional-column-width(1)"/>
+        <fo:table-column column-width="proportional-column-width(1)"/>
+        <fo:table-header font-weight="bold">
+          <fo:table-row>
+            <fo:table-cell border="1pt solid black" padding-left="1pt">
+              <fo:block>Table Header</fo:block>
+            </fo:table-cell>
+            <fo:table-cell border="1pt solid black" padding-left="1pt">
+              <fo:block>Column 1</fo:block>
+            </fo:table-cell>
+            <fo:table-cell border="1pt solid black" padding-left="1pt">
+              <fo:block>Column 2</fo:block>
+            </fo:table-cell>
+          </fo:table-row>
+        </fo:table-header>
+        <fo:table-body>
+          <fo:table-row>
+            <fo:table-cell id="Row1" border="1pt solid black" padding-left="1pt" font-weight="bold">
+              <fo:block>Row 1</fo:block>
+            </fo:table-cell>
+            <fo:table-cell border="1pt solid black" padding-left="1pt">
+              <fo:block>Cell 1.1</fo:block>
+            </fo:table-cell>
+            <fo:table-cell border="1pt solid black" padding-left="1pt">
+              <fo:block>Cell 1.2</fo:block>
+            </fo:table-cell>
+          </fo:table-row>
+          <fo:table-row>
+            <fo:table-cell border="1pt solid black" padding-left="1pt" font-weight="bold" role="TH">
+              <fo:block>Row 2</fo:block>
+            </fo:table-cell>
+            <fo:table-cell border="1pt solid black" padding-left="1pt">
+              <fo:block>Cell 2.1</fo:block>
+            </fo:table-cell>
+            <fo:table-cell border="1pt solid black" padding-left="1pt">
+              <fo:block>Cell 2.2</fo:block>
+            </fo:table-cell>
+          </fo:table-row>
+          <fo:table-row>
+            <fo:table-cell border="1pt solid black" padding-left="1pt" role="TD">
+              <fo:block>Non-header</fo:block>
+            </fo:table-cell>
+            <fo:table-cell border="1pt solid black" padding-left="1pt">
+              <fo:block>Cell 3.1</fo:block>
+            </fo:table-cell>
+            <fo:table-cell border="1pt solid black" padding-left="1pt">
+              <fo:block>Cell 3.2</fo:block>
+            </fo:table-cell>
+          </fo:table-row>
+        </fo:table-body>
+      </fo:table>
+    </fo:flow>
+  </fo:page-sequence>
+</fo:root>