| /* |
| * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package javax.swing.text.html; |
| |
| import javax.swing.text.*; |
| import java.io.Serializable; |
| import java.util.*; |
| |
| /** |
| * An implementation of <code>AttributeSet</code> that can multiplex |
| * across a set of <code>AttributeSet</code>s. |
| * |
| */ |
| class MuxingAttributeSet implements AttributeSet, Serializable { |
| /** |
| * Creates a <code>MuxingAttributeSet</code> with the passed in |
| * attributes. |
| */ |
| public MuxingAttributeSet(AttributeSet[] attrs) { |
| this.attrs = attrs; |
| } |
| |
| /** |
| * Creates an empty <code>MuxingAttributeSet</code>. This is intended for |
| * use by subclasses only, and it is also intended that subclasses will |
| * set the constituent <code>AttributeSet</code>s before invoking any |
| * of the <code>AttributeSet</code> methods. |
| */ |
| protected MuxingAttributeSet() { |
| } |
| |
| /** |
| * Directly sets the <code>AttributeSet</code>s that comprise this |
| * <code>MuxingAttributeSet</code>. |
| */ |
| protected synchronized void setAttributes(AttributeSet[] attrs) { |
| this.attrs = attrs; |
| } |
| |
| /** |
| * Returns the <code>AttributeSet</code>s multiplexing too. When the |
| * <code>AttributeSet</code>s need to be referenced, this should be called. |
| */ |
| protected synchronized AttributeSet[] getAttributes() { |
| return attrs; |
| } |
| |
| /** |
| * Inserts <code>as</code> at <code>index</code>. This assumes |
| * the value of <code>index</code> is between 0 and attrs.length, |
| * inclusive. |
| */ |
| protected synchronized void insertAttributeSetAt(AttributeSet as, |
| int index) { |
| int numAttrs = attrs.length; |
| AttributeSet newAttrs[] = new AttributeSet[numAttrs + 1]; |
| if (index < numAttrs) { |
| if (index > 0) { |
| System.arraycopy(attrs, 0, newAttrs, 0, index); |
| System.arraycopy(attrs, index, newAttrs, index + 1, |
| numAttrs - index); |
| } |
| else { |
| System.arraycopy(attrs, 0, newAttrs, 1, numAttrs); |
| } |
| } |
| else { |
| System.arraycopy(attrs, 0, newAttrs, 0, numAttrs); |
| } |
| newAttrs[index] = as; |
| attrs = newAttrs; |
| } |
| |
| /** |
| * Removes the AttributeSet at <code>index</code>. This assumes |
| * the value of <code>index</code> is greater than or equal to 0, |
| * and less than attrs.length. |
| */ |
| protected synchronized void removeAttributeSetAt(int index) { |
| int numAttrs = attrs.length; |
| AttributeSet[] newAttrs = new AttributeSet[numAttrs - 1]; |
| if (numAttrs > 0) { |
| if (index == 0) { |
| // FIRST |
| System.arraycopy(attrs, 1, newAttrs, 0, numAttrs - 1); |
| } |
| else if (index < (numAttrs - 1)) { |
| // MIDDLE |
| System.arraycopy(attrs, 0, newAttrs, 0, index); |
| System.arraycopy(attrs, index + 1, newAttrs, index, |
| numAttrs - index - 1); |
| } |
| else { |
| // END |
| System.arraycopy(attrs, 0, newAttrs, 0, numAttrs - 1); |
| } |
| } |
| attrs = newAttrs; |
| } |
| |
| // --- AttributeSet methods ---------------------------- |
| |
| /** |
| * Gets the number of attributes that are defined. |
| * |
| * @return the number of attributes |
| * @see AttributeSet#getAttributeCount |
| */ |
| public int getAttributeCount() { |
| AttributeSet[] as = getAttributes(); |
| int n = 0; |
| for (int i = 0; i < as.length; i++) { |
| n += as[i].getAttributeCount(); |
| } |
| return n; |
| } |
| |
| /** |
| * Checks whether a given attribute is defined. |
| * This will convert the key over to CSS if the |
| * key is a StyleConstants key that has a CSS |
| * mapping. |
| * |
| * @param key the attribute key |
| * @return true if the attribute is defined |
| * @see AttributeSet#isDefined |
| */ |
| public boolean isDefined(Object key) { |
| AttributeSet[] as = getAttributes(); |
| for (int i = 0; i < as.length; i++) { |
| if (as[i].isDefined(key)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Checks whether two attribute sets are equal. |
| * |
| * @param attr the attribute set to check against |
| * @return true if the same |
| * @see AttributeSet#isEqual |
| */ |
| public boolean isEqual(AttributeSet attr) { |
| return ((getAttributeCount() == attr.getAttributeCount()) && |
| containsAttributes(attr)); |
| } |
| |
| /** |
| * Copies a set of attributes. |
| * |
| * @return the copy |
| * @see AttributeSet#copyAttributes |
| */ |
| public AttributeSet copyAttributes() { |
| AttributeSet[] as = getAttributes(); |
| MutableAttributeSet a = new SimpleAttributeSet(); |
| int n = 0; |
| for (int i = as.length - 1; i >= 0; i--) { |
| a.addAttributes(as[i]); |
| } |
| return a; |
| } |
| |
| /** |
| * Gets the value of an attribute. If the requested |
| * attribute is a StyleConstants attribute that has |
| * a CSS mapping, the request will be converted. |
| * |
| * @param key the attribute name |
| * @return the attribute value |
| * @see AttributeSet#getAttribute |
| */ |
| public Object getAttribute(Object key) { |
| AttributeSet[] as = getAttributes(); |
| int n = as.length; |
| for (int i = 0; i < n; i++) { |
| Object o = as[i].getAttribute(key); |
| if (o != null) { |
| return o; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Gets the names of all attributes. |
| * |
| * @return the attribute names |
| * @see AttributeSet#getAttributeNames |
| */ |
| public Enumeration getAttributeNames() { |
| return new MuxingAttributeNameEnumeration(); |
| } |
| |
| /** |
| * Checks whether a given attribute name/value is defined. |
| * |
| * @param name the attribute name |
| * @param value the attribute value |
| * @return true if the name/value is defined |
| * @see AttributeSet#containsAttribute |
| */ |
| public boolean containsAttribute(Object name, Object value) { |
| return value.equals(getAttribute(name)); |
| } |
| |
| /** |
| * Checks whether the attribute set contains all of |
| * the given attributes. |
| * |
| * @param attrs the attributes to check |
| * @return true if the element contains all the attributes |
| * @see AttributeSet#containsAttributes |
| */ |
| public boolean containsAttributes(AttributeSet attrs) { |
| boolean result = true; |
| |
| Enumeration names = attrs.getAttributeNames(); |
| while (result && names.hasMoreElements()) { |
| Object name = names.nextElement(); |
| result = attrs.getAttribute(name).equals(getAttribute(name)); |
| } |
| |
| return result; |
| } |
| |
| /** |
| * Returns null, subclasses may wish to do something more |
| * intelligent with this. |
| */ |
| public AttributeSet getResolveParent() { |
| return null; |
| } |
| |
| /** |
| * The <code>AttributeSet</code>s that make up the resulting |
| * <code>AttributeSet</code>. |
| */ |
| private AttributeSet[] attrs; |
| |
| |
| /** |
| * An Enumeration of the Attribute names in a MuxingAttributeSet. |
| * This may return the same name more than once. |
| */ |
| private class MuxingAttributeNameEnumeration implements Enumeration { |
| |
| MuxingAttributeNameEnumeration() { |
| updateEnum(); |
| } |
| |
| public boolean hasMoreElements() { |
| if (currentEnum == null) { |
| return false; |
| } |
| return currentEnum.hasMoreElements(); |
| } |
| |
| public Object nextElement() { |
| if (currentEnum == null) { |
| throw new NoSuchElementException("No more names"); |
| } |
| Object retObject = currentEnum.nextElement(); |
| if (!currentEnum.hasMoreElements()) { |
| updateEnum(); |
| } |
| return retObject; |
| } |
| |
| void updateEnum() { |
| AttributeSet[] as = getAttributes(); |
| currentEnum = null; |
| while (currentEnum == null && attrIndex < as.length) { |
| currentEnum = as[attrIndex++].getAttributeNames(); |
| if (!currentEnum.hasMoreElements()) { |
| currentEnum = null; |
| } |
| } |
| } |
| |
| |
| /** Index into attrs the current Enumeration came from. */ |
| private int attrIndex; |
| /** Enumeration from attrs. */ |
| private Enumeration currentEnum; |
| } |
| } |