Fixed support for links and images in the Intermediate Format

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/Temp_Accessibility@822808 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/fop/render/intermediate/IFParser.java

@@ -33,8 +33,6 @@ import javax.xml.transform.TransformerException;
 import javax.xml.transform.sax.SAXResult;
 import javax.xml.transform.sax.SAXTransformerFactory;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.w3c.dom.DOMImplementation;
 import org.w3c.dom.Document;
 import org.xml.sax.Attributes;
@@ -43,6 +41,9 @@ import org.xml.sax.SAXException;
 import org.xml.sax.helpers.AttributesImpl;
 import org.xml.sax.helpers.DefaultHandler;
 
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
 import org.apache.xmlgraphics.util.QName;
 
 import org.apache.fop.accessibility.ParsedStructureTree;
@@ -550,8 +551,7 @@ public class IFParser implements IFConstants {
                 s = lastAttributes.getValue("word-spacing");
                 int wordSpacing = (s != null ? Integer.parseInt(s) : 0);
                 int[] dx = XMLUtil.getAttributeAsIntArray(lastAttributes, "dx");
-                String ptr = lastAttributes.getValue("ptr"); // used for accessibility
-                establishStructurePointer(ptr);
+                setAccessibilityPointer(lastAttributes);
                 painter.drawText(x, y, letterSpacing, wordSpacing, dx, content.toString());
                 resetStructurePointer();
             }
@@ -648,8 +648,7 @@ public class IFParser implements IFConstants {
                 int height = Integer.parseInt(lastAttributes.getValue("height"));
                 Map foreignAttributes = getForeignAttributes(lastAttributes);
                 establishForeignAttributes(foreignAttributes);
-                String ptr = lastAttributes.getValue("ptr"); // used for accessibility
-                establishStructurePointer(ptr);
+                setAccessibilityPointer(lastAttributes);
                 if (foreignObject != null) {
                     painter.drawImage(foreignObject,
                             new Rectangle(x, y, width, height));
@@ -717,6 +716,13 @@ public class IFParser implements IFConstants {
             return foreignAttributes;
         }
 
+        private void setAccessibilityPointer(Attributes attributes) {
+            String ptr = attributes.getValue("ptr");
+            if (ptr != null && ptr.length() > 0) {
+                establishStructurePointer(ptr);
+            }
+        }
+
         /** {@inheritDoc} */
         public void characters(char[] ch, int start, int length) throws SAXException {
             if (delegate != null) {

src/java/org/apache/fop/render/intermediate/IFSerializer.java

@@ -419,7 +419,7 @@ public class IFSerializer extends AbstractXMLWritingIFDocumentHandler
         }
     }
 
-    private void addForeignAttributes(AttributesImpl atts) {
+    private void addForeignAttributes(AttributesImpl atts) throws SAXException {
         Map foreignAttributes = getContext().getForeignAttributes();
         if (!foreignAttributes.isEmpty()) {
             Iterator iter = foreignAttributes.entrySet().iterator();
@@ -646,7 +646,8 @@ public class IFSerializer extends AbstractXMLWritingIFDocumentHandler
     }
 
     private void addAttribute(AttributesImpl atts,
-            org.apache.xmlgraphics.util.QName attribute, String value) {
+            org.apache.xmlgraphics.util.QName attribute, String value) throws SAXException {
+        handler.startPrefixMapping(attribute.getPrefix(), attribute.getNamespaceURI());
         XMLUtil.addAttribute(atts, attribute, value);
     }
 
@@ -725,6 +726,9 @@ public class IFSerializer extends AbstractXMLWritingIFDocumentHandler
         AttributesImpl atts = new AttributesImpl();
         atts.addAttribute(null, "rect", "rect",
                 XMLConstants.CDATA, IFUtil.toString(link.getTargetRect()));
+        if (getUserAgent().isAccessibilityEnabled()) {
+            addAttribute(atts, "ptr", link.getAction().getPtr());
+        }
         try {
             handler.startElement(DocumentNavigationExtensionConstants.LINK, atts);
             serializeXMLizable(link.getAction());

src/java/org/apache/fop/render/intermediate/extensions/DocumentNavigationHandler.java

@@ -48,6 +48,8 @@ public class DocumentNavigationHandler extends DefaultHandler
 
     private IFDocumentNavigationHandler navHandler;
 
+    private String accessibilityPointer;
+
     /**
      * Main constructor.
      * @param navHandler the navigation handler that will receive the events
@@ -96,6 +98,7 @@ public class DocumentNavigationHandler extends DefaultHandler
                     throw new SAXException(localName + " must be the root element!");
                 }
                 Rectangle targetRect = XMLUtil.getAttributeAsRectangle(attributes, "rect");
+                accessibilityPointer = attributes.getValue("ptr");
                 Link link = new Link(null, targetRect);
                 objectStack.push(link);
             } else if (GOTO_XY.getLocalName().equals(localName)) {
@@ -118,6 +121,9 @@ public class DocumentNavigationHandler extends DefaultHandler
                     }
                     action = new GoToXYAction(id, pageIndex, location);
                 }
+                if (accessibilityPointer != null) {
+                    action.setPtr(accessibilityPointer);
+                }
                 objectStack.push(action);
             } else if (GOTO_URI.getLocalName().equals(localName)) {
                 String id = attributes.getValue("id");
@@ -128,6 +134,9 @@ public class DocumentNavigationHandler extends DefaultHandler
                 if (id != null) {
                     action.setID(id);
                 }
+                if (accessibilityPointer != null) {
+                    action.setPtr(accessibilityPointer);
+                }
                 objectStack.push(action);
             } else {
                 throw new SAXException(