extends adapter instead of implementing useragent

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@194699 13f79535-47bb-0310-9956-ffa450edef68

src/org/apache/fop/svg/PDFTranscoder.java

@@ -38,6 +38,7 @@ import org.apache.batik.bridge.BridgeContext;
 import org.apache.batik.bridge.BridgeException;
 import org.apache.batik.bridge.GVTBuilder;
 import org.apache.batik.bridge.UserAgent;
+import org.apache.batik.bridge.UserAgentAdapter;
 import org.apache.batik.bridge.ViewBox;
 
 import org.apache.batik.dom.svg.DefaultSVGContext;
@@ -310,7 +311,7 @@ public class PDFTranscoder extends XMLAbstractTranscoder {
     /**
      * A user agent implementation for <tt>ImageTranscoder</tt>.
      */
-    protected class ImageTranscoderUserAgent implements UserAgent {
+    protected class ImageTranscoderUserAgent extends UserAgentAdapter {
 
         /**
          * Returns the default size of this user agent (400x400).
@@ -404,68 +405,11 @@ public class PDFTranscoder extends XMLAbstractTranscoder {
             return false;
         }
 
-        /**
-         * Unsupported operation.
-         */
-        public EventDispatcher getEventDispatcher() {
-            return null;
-        }
-
-        /**
-         * Unsupported operation.
-         */
-        public void openLink(SVGAElement elt) {}
-
-        /**
-         * Unsupported operation.
-         */
-        public void setSVGCursor(Cursor cursor) {}
-
-        /**
-         * Unsupported operation.
-         */
-        public void runThread(Thread t) {}
-
         /**
          * Unsupported operation.
          */
         public AffineTransform getTransform() {
             return null;
         }
-
-        /**
-         * Unsupported operation.
-         */
-        public Point getClientAreaLocationOnScreen() {
-            return new Point();
-        }
-
-        /**
-         * Tells whether the given feature is supported by this
-         * user agent.
-         */
-        public boolean hasFeature(String s) {
-            return FEATURES.contains(s);
-        }
-
-        /**
-         * Tells whether the given extension is supported by this
-         * user agent.
-         */
-        public boolean supportExtension(String s) {
-            return false;
-        }
-
-        public void registerExtension(BridgeExtension be) {}
-
-        public void handleElement(Element elt, Object data) {}
-
-    }
-
-    protected final static Set FEATURES = new HashSet();
-    static {
-        FEATURES.add(SVGConstants.SVG_ORG_W3C_SVG_FEATURE);
-        FEATURES.add(SVGConstants.SVG_ORG_W3C_SVG_LANG_FEATURE);
-        FEATURES.add(SVGConstants.SVG_ORG_W3C_SVG_STATIC_FEATURE);
     }
 }

src/org/apache/fop/svg/SVGUserAgent.java

@@ -31,7 +31,7 @@ import java.awt.Point;
 import java.awt.RenderingHints;
 import java.awt.Dimension;
 
-public class SVGUserAgent implements UserAgent {
+public class SVGUserAgent extends UserAgentAdapter {
     AffineTransform currentTransform = null;
     Logger log;
 
@@ -68,6 +68,13 @@ public class SVGUserAgent implements UserAgent {
         log.info(message);
     }
 
+    /**
+     * Shows an alert dialog box.
+     */
+    public void showAlert(String message) {
+        log.warn(message);
+    }
+
     /**
      * Returns a customized the pixel to mm factor.
      */
@@ -107,20 +114,6 @@ public class SVGUserAgent implements UserAgent {
         return false;
     }
 
-    /**
-     * Opens a link in a new component.
-     * @param doc The current document.
-     * @param uri The document URI.
-     */
-    public void openLink(SVGAElement elt) {
-    }
-
-    public Point getClientAreaLocationOnScreen() {
-        return new Point(0, 0);
-    }
-
-    public void setSVGCursor(java.awt.Cursor cursor) {}
-
     public AffineTransform getTransform() {
         return currentTransform;
     }
@@ -129,21 +122,5 @@ public class SVGUserAgent implements UserAgent {
         return new Dimension(100, 100);
     }
 
-    public EventDispatcher getEventDispatcher() {
-        return null;
-    }
-
-    public boolean supportExtension(String str) {
-        return false;
-    }
-
-    public boolean hasFeature(String str) {
-        return false;
-    }
-
-    public void registerExtension(BridgeExtension be) {}
-
-    public void handleElement(Element elt, Object data) {}
-
 }