| /* 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 |
| { |
| /** |
| * 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); |
| } |
| |
| } |