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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/javax/swing/text/html/MultiAttributeSet.java
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+/* MultiAttributeSet.java -- Multiplexes between a set of AttributeSets
+ 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.util.Enumeration;
+import java.util.NoSuchElementException;
+
+import javax.swing.text.AttributeSet;
+import javax.swing.text.SimpleAttributeSet;
+
+/**
+ * An AttributeSet impl that multiplexes between a set of other AttributeSets.
+ *
+ * @author Roman Kennke (kennke@aicas.com)
+ */
+class MultiAttributeSet
+ implements AttributeSet
+{
+
+ /**
+ * The Enumeration for the multiplexed names.
+ */
+ private class MultiNameEnumeration
+ implements Enumeration<Object>
+ {
+ /**
+ * The index of the current AttributeSet.
+ */
+ private int index;
+
+ /**
+ * The names Enumeration of the current AttributeSet.
+ */
+ private Enumeration<?> current;
+
+ /**
+ * Creates a new instance.
+ */
+ MultiNameEnumeration()
+ {
+ index = 0;
+ current = multi[0].getAttributeNames();
+ }
+
+ public boolean hasMoreElements()
+ {
+ return current.hasMoreElements() || index < multi.length - 1;
+ }
+
+ public Object nextElement()
+ {
+ if (! current.hasMoreElements())
+ {
+ if (index < multi.length - 1)
+ {
+ index++;
+ current = multi[index].getAttributeNames();
+ }
+ else
+ throw new NoSuchElementException();
+ }
+ return current.nextElement();
+ }
+
+ }
+
+ /**
+ * The AttributeSets to multiplex.
+ */
+ AttributeSet[] multi;
+
+ /**
+ * Provided for subclasses that need to initialize via {@link #init}.
+ */
+ MultiAttributeSet()
+ {
+ // Nothing to do here.
+ }
+
+ /**
+ * Creates a new instance.
+ *
+ * @param m the AttributeSets to multiplex
+ */
+ MultiAttributeSet(AttributeSet[] m)
+ {
+ init(m);
+ }
+
+ /**
+ * Provided for subclasses to initialize the attribute set.
+ *
+ * @param m the attributes to multiplex
+ */
+ void init(AttributeSet[] m)
+ {
+ multi = m;
+ }
+
+ public boolean containsAttribute(Object name, Object value)
+ {
+ boolean ret = false;
+ for (int i = 0; i < multi.length && ret == false; i++)
+ {
+ if (multi[i].containsAttribute(name, value))
+ ret = true;
+ }
+ return ret;
+ }
+
+ public boolean containsAttributes(AttributeSet attributes)
+ {
+ boolean ret = true;
+ Enumeration<?> e = attributes.getAttributeNames();
+ while (ret && e.hasMoreElements())
+ {
+ Object key = e.nextElement();
+ ret = attributes.getAttribute(key).equals(getAttribute(key));
+ }
+ return ret;
+ }
+
+ public AttributeSet copyAttributes()
+ {
+ SimpleAttributeSet copy = new SimpleAttributeSet();
+ for (int i = 0; i < multi.length; i++)
+ {
+ copy.addAttributes(multi[i]);
+ }
+ return copy;
+ }
+
+ public Object getAttribute(Object key)
+ {
+ Object ret = null;
+ for (int i = 0; i < multi.length && ret == null; i++)
+ {
+ ret = multi[i].getAttribute(key);
+ }
+ return ret;
+ }
+
+ public int getAttributeCount()
+ {
+ int n = 0;
+ for (int i = 0; i < multi.length; i++)
+ {
+ n += multi[i].getAttributeCount();
+ }
+ return n;
+ }
+
+ public Enumeration<?> getAttributeNames()
+ {
+ return new MultiNameEnumeration();
+ }
+
+ public AttributeSet getResolveParent()
+ {
+ return null;
+ }
+
+ public boolean isDefined(Object attrName)
+ {
+ boolean ret = false;
+ for (int i = 0; i < multi.length && ! ret; i++)
+ ret = multi[i].isDefined(attrName);
+ return ret;
+ }
+
+ public boolean isEqual(AttributeSet attr)
+ {
+ return getAttributeCount() == attr.getAttributeCount()
+ && containsAttributes(attr);
+ }
+
+}