| /* SmallHtmlAttributeSet.java -- Small fixed HTML attribute set |
| 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 gnu.javax.swing.text.html.parser; |
| |
| import java.io.Serializable; |
| import java.util.Enumeration; |
| import java.util.NoSuchElementException; |
| |
| import javax.swing.text.AttributeSet; |
| import javax.swing.text.html.HTML.Attribute; |
| import javax.swing.text.html.HTML.Tag; |
| |
| /** |
| * Small fixed HTML attribute set. The most of the HTML elements contain only |
| * several attributes. With four attributes, the number of operations in more |
| * complex algorithms is not larger than using the naive algorithm. |
| * |
| * Same as HtmlAttributeSet, this set allows both strings and non-string as |
| * keys. The strings are case insensitive, the non strings are compared with |
| * .equals. |
| * |
| * @author Audrius Meskauskas (AudriusA@Bioinformatics.org) |
| */ |
| public class SmallHtmlAttributeSet |
| implements AttributeSet, Cloneable, Serializable |
| { |
| private static final long serialVersionUID = 1; |
| |
| /** |
| * The keys, stored in this attribute set. |
| */ |
| final Object[] keys; |
| |
| /** |
| * The values, stored in this attribute set. |
| */ |
| final Object[] values; |
| |
| /** |
| * The parent, used for resolving the values, not found in this set. |
| */ |
| final AttributeSet parent; |
| |
| /** |
| * Create a new small fixed attribute set that contains the unchangeable copy |
| * of the passed attribute set and inherits its parent. |
| * |
| * @param copyFrom the attribute set, containing the attribute values to copy. |
| */ |
| public SmallHtmlAttributeSet(AttributeSet copyFrom) |
| { |
| int n = copyFrom.getAttributeCount(); |
| |
| keys = new Object[n]; |
| values = new Object[n]; |
| parent = copyFrom.getResolveParent(); |
| |
| Enumeration en = copyFrom.getAttributeNames(); |
| Object key; |
| Object value; |
| |
| for (int i = 0; i < n; i++) |
| { |
| key = en.nextElement(); |
| keys[i] = key; |
| value = copyFrom.getAttribute(key); |
| values[i] = value; |
| } |
| } |
| |
| public boolean containsAttribute(Object name, Object value) |
| { |
| Object contains = getAttribute(name); |
| if (value == null) |
| return value == contains; |
| else |
| return value.equals(contains); |
| } |
| |
| public boolean containsAttributes(AttributeSet attributes) |
| { |
| if (attributes == this) |
| return true; |
| Object v; |
| for (int i = 0; i < keys.length; i++) |
| { |
| v = attributes.getAttribute(keys[i]); |
| if (v != values[i]) |
| { |
| if (values[i] == null) |
| return false; |
| else if (! values[i].equals(v)) |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * THIS can be safely returned as the set is not mutable. |
| */ |
| public AttributeSet copyAttributes() |
| { |
| return this; |
| } |
| |
| /** |
| * Get the attribute value, matching this key. If not found in this set, the |
| * call is delegated to parent. |
| * |
| * @return the value, matching key (or null if none). |
| */ |
| public Object getAttribute(Object key) |
| { |
| // Null and HTML attributes or tags can be searched by direct comparison. |
| if (key == null || key instanceof Attribute || key instanceof Tag) |
| { |
| for (int i = 0; i < keys.length; i++) |
| { |
| if (keys[i] == key) |
| return values[i]; |
| } |
| } |
| |
| // Strings are case insensitive. Only string can be match the string. |
| else if (key instanceof String) |
| { |
| String ks = (String) key; |
| for (int i = 0; i < keys.length; i++) |
| { |
| if (keys[i] instanceof String) |
| if (ks.equalsIgnoreCase((String) keys[i])) |
| return values[i]; |
| } |
| } |
| |
| // Otherwise, defaults to .equals |
| else |
| { |
| for (int i = 0; i < keys.length; i++) |
| { |
| if (key.equals(keys[i])) |
| return values[i]; |
| } |
| } |
| |
| if (parent != null) |
| return parent.getAttribute(key); |
| else |
| return null; |
| } |
| |
| /** |
| * Get the number of the stored attributes. |
| */ |
| public int getAttributeCount() |
| { |
| return keys.length; |
| } |
| |
| /** |
| * Get enumeration, containing the attribute names. No guard agains the |
| * concurent modification is required as the set is not mutable. |
| */ |
| public Enumeration getAttributeNames() |
| { |
| return new Enumeration() |
| { |
| int p = 0; |
| |
| public boolean hasMoreElements() |
| { |
| return p < keys.length; |
| } |
| |
| public Object nextElement() |
| { |
| if (p < keys.length) |
| return keys[p++]; |
| else |
| throw new NoSuchElementException(); |
| } |
| }; |
| } |
| |
| /** |
| * Get the parent that this set uses to resolve the not found attributes. |
| */ |
| public AttributeSet getResolveParent() |
| { |
| return parent; |
| } |
| |
| /** |
| * Check if the given attribute is defined in this set (not in the parent). |
| */ |
| public boolean isDefined(Object attrName) |
| { |
| if (attrName instanceof String) |
| attrName = ((String) attrName).toLowerCase(); |
| |
| for (int i = 0; i < keys.length; i++) |
| { |
| if (attrName.equals(keys[i])) |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Check this set and another set for equality by content. |
| */ |
| public boolean isEqual(AttributeSet attr) |
| { |
| return keys.length == attr.getAttributeCount() && containsAttributes(attr); |
| } |
| |
| /** |
| * It is safe to return THIS on cloning, if one happens. |
| */ |
| protected Object clone() |
| { |
| return this; |
| } |
| } |