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+/* NullView.java -- A dummy view that renders nothing
+ Copyright (C) 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.swing.text.html;
+
+import java.awt.Graphics;
+import java.awt.Shape;
+
+import javax.swing.text.BadLocationException;
+import javax.swing.text.Element;
+import javax.swing.text.View;
+import javax.swing.text.Position.Bias;
+
+/**
+ * A dummy view that renders nothing. This is used for invisible HTML elements
+ * like <head>.
+ *
+ * @author Roman Kennke (kennke@aicas.com)
+ */
+class NullView
+ extends View
+{
+
+ /**
+ * Creates a new NullView.
+ *
+ * @param elem the element
+ */
+ public NullView(Element elem)
+ {
+ super(elem);
+ }
+
+ /**
+ * Does nothing.
+ */
+ public void paint(Graphics g, Shape s)
+ {
+ // Nothing to do here.
+ }
+
+ /**
+ * Returns zero for both directions.
+ */
+ public float getPreferredSpan(int axis)
+ {
+ return 0;
+ }
+
+ /**
+ * Returns the allocation of this view, which should be empty anyway.
+ */
+ public Shape modelToView(int pos, Shape a, Bias b)
+ throws BadLocationException
+ {
+ return a;
+ }
+
+ /**
+ * Returns the start offset of the element.
+ */
+ public int viewToModel(float x, float y, Shape a, Bias[] b)
+ {
+ return getElement().getStartOffset();
+ }
+
+}