1 files changed, 60 insertions, 0 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/visualization/svg/SVGCloneVisible.java b/src/de/lmu/ifi/dbs/elki/visualization/svg/SVGCloneVisible.java
new file mode 100644
index 00000000..749720ee
--- /dev/null
+++ b/src/de/lmu/ifi/dbs/elki/visualization/svg/SVGCloneVisible.java
@@ -0,0 +1,60 @@
+package de.lmu.ifi.dbs.elki.visualization.svg;
+
+/*
+ This file is part of ELKI:
+ Environment for Developing KDD-Applications Supported by Index-Structures
+
+ Copyright (C) 2012
+ Ludwig-Maximilians-Universität München
+ Lehr- und Forschungseinheit für Datenbanksysteme
+ ELKI Development Team
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import org.apache.batik.util.SVGConstants;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
+import de.lmu.ifi.dbs.elki.utilities.xml.DOMCloner;
+
+/**
+ * Clone visible parts of an SVG document.
+ * 
+ * @author Erich Schubert
+ */
+public class SVGCloneVisible extends DOMCloner {
+  @Override
+  public Node cloneNode(Document doc, Node eold) {
+    // Skip elements with visibility=hidden
+    if(eold instanceof Element) {
+      Element eeold = (Element) eold;
+      String vis = eeold.getAttribute(SVGConstants.CSS_VISIBILITY_PROPERTY);
+      if(SVGConstants.CSS_HIDDEN_VALUE.equals(vis)) {
+        return null;
+      }
+    }
+    // Perform clone flat
+    Node enew = doc.importNode(eold, false);
+    // Recurse:
+    for(Node n = eold.getFirstChild(); n != null; n = n.getNextSibling()) {
+      final Node clone = cloneNode(doc, n);
+      if (clone != null) {
+        enew.appendChild(clone);
+      }
+    }
+    return enew;
+  }
+}