Added an IFDocumentHandler filter for triggering rendering events.

Created an Event that captures an end page event with the page number.


git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1137566 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/fop/render/RendererEventProducer.java

      * @event.severity ERROR
      */
     void ioError(Object source, IOException ioe);
+
+    /**
+     * Triggered at the end of page rendering.
+     * @param source the event source
+     * @param number the page number
+     */
+    void endPage(Object source, int number);
 }

src/java/org/apache/fop/render/RendererEventProducer.xml

 <!-- $Id$ -->
 <catalogue xml:lang="en">
   <message key="ioError">I/O error while writing to target file.[ Reason: {ioe}]</message>
+  <message key="endPage">Rendered page #{number}.</message>
 </catalogue>

src/java/org/apache/fop/render/RendererFactory.java

 import org.apache.fop.area.AreaTreeHandler;
 import org.apache.fop.fo.FOEventHandler;
 import org.apache.fop.render.intermediate.AbstractIFDocumentHandlerMaker;
+import org.apache.fop.render.intermediate.EventProducingFilter;
 import org.apache.fop.render.intermediate.IFDocumentHandler;
 import org.apache.fop.render.intermediate.IFDocumentHandlerConfigurator;
 import org.apache.fop.render.intermediate.IFRenderer;
         if (configurator != null) {
             configurator.configure(documentHandler);
         }
-        return documentHandler;
+        return new EventProducingFilter(documentHandler, userAgent);
     }
 
     /**

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

+/*
+ * 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.render.intermediate;
+
+import org.apache.fop.apps.FOUserAgent;
+import org.apache.fop.render.RendererEventProducer;
+import org.apache.fop.render.intermediate.util.IFDocumentHandlerProxy;
+
+/**
+ * A filter that uses the Event Notification System to broadcast IF events.
+ *
+ */
+public class EventProducingFilter extends IFDocumentHandlerProxy {
+
+    private int pageNumberEnded;
+
+    private FOUserAgent userAgent;
+
+    /**
+     * Constructor
+     * @param ifDocumentHandler the IFDocumentHandler to filter
+     * @param userAgent the FOUerAgent
+     */
+    public EventProducingFilter(IFDocumentHandler ifDocumentHandler, FOUserAgent userAgent) {
+        super(ifDocumentHandler);
+        this.userAgent = userAgent;
+    }
+
+    @Override
+    public void endPage() throws IFException {
+        super.endPage();
+        pageNumberEnded++;
+        RendererEventProducer.Provider.get(userAgent.getEventBroadcaster())
+                .endPage(this, pageNumberEnded);
+    }
+
+}

status.xml

     <person name="Andreas Delmelle"  email="adelmelle@apache.org"     id="AD"/>
     <person name="Luca Furini"       email="lfurini@apache.org"       id="LF"/>
     <person name="Christian Geisert" email="chrisg@apache.org"        id="CG"/>
+    <person name="Peter Hancock"     email="phancock@apache.org"      id="PH"/>
     <person name="Vincent Hennebert" email="vhennebert@apache.org"    id="VH"/>
     <person name="Clay Leeds"        email="clay@apache.org"          id="CL"/>
     <person name="Manuel Mall"       email="manuel@apache.org"        id="MM"/>
       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="PH" type="add">
+        Added an IFDocumentHandler filter for triggering rendering events.  Created an Event that
+        captures an end page event with the page number.
+      </action>
       <action context="Renderers" dev="VH" type="fix">
         Bugfix: alternative text not working in tagged PDF for TIFF images.
       </action>