Supersedes AbstractViewport as superclass for block-level viewport-areas.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/FOP_0-20-0_Alt-Design@197819 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/fop/area/BlockViewportArea.java

@@ -0,0 +1,87 @@
+/*
+ *
+ * Copyright 2004 The Apache Software Foundation.
+ *
+ * Licensed 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.
+ *
+ * Created on 24/07/2004
+ * $Id$
+ */
+package org.apache.fop.area;
+
+import org.apache.fop.datastructs.Node;
+import org.apache.fop.fo.FONode;
+import org.apache.fop.fo.flow.FoPageSequence;
+
+
+/**
+ * @author pbw
+ * @version $Revision$ $Name$
+ */
+public abstract class BlockViewportArea extends BlockArea implements Viewport {
+
+    private static final String tag = "$Name$";
+    private static final String revision = "$Revision$";
+    
+    /** Does the viewport rectange clip the reference-area? */
+    protected boolean clip = true;
+
+    /** The reference-area of the viewport/reference pair */
+    protected ReferenceArea refArea;
+
+    /**
+     * @param pageSeq
+     * @param generatedBy
+     * @param parent
+     * @param sync
+     */
+    public BlockViewportArea(FoPageSequence pageSeq, FONode generatedBy,
+            Node parent, Object sync) {
+        super(pageSeq, generatedBy, parent, sync);
+        // TODO Auto-generated constructor stub
+    }
+
+    /* (non-Javadoc)
+     * @see org.apache.fop.area.Viewport#setReferenceArea(org.apache.fop.area.ReferenceArea)
+     */
+    public void setReferenceArea(ReferenceArea ref) {
+        synchronized (sync) {
+            refArea = ref;
+        }
+    }
+    /* (non-Javadoc)
+     * @see org.apache.fop.area.Viewport#getReferenceArea()
+     */
+    public ReferenceArea getReferenceArea() {
+        synchronized (sync) {
+            return refArea;
+        }
+    }
+    /* (non-Javadoc)
+     * @see org.apache.fop.area.Viewport#setClip(boolean)
+     */
+    public void setClip(boolean clip) {
+        synchronized (sync) {
+            this.clip = clip;
+        }
+    }
+    /* (non-Javadoc)
+     * @see org.apache.fop.area.Viewport#getClip()
+     */
+    public boolean getClip() {
+        synchronized (sync) {
+            return clip;
+        }
+    }
+
+}