1 /*
2 * Copyright 1998 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package javax.swing.text.html.parser;
27
28 import java.util.Hashtable;
29 import java.util.BitSet;
30 import java.io;
31
32 /**
33 * An element as described in a DTD using the ELEMENT construct.
34 * This is essentiall the description of a tag. It describes the
35 * type, content model, attributes, attribute types etc. It is used
36 * to correctly parse a document by the Parser.
37 *
38 * @see DTD
39 * @see AttributeList
40 * @author Arthur van Hoff
41 */
42 public final
43 class Element implements DTDConstants, Serializable {
44 public int index;
45 public String name;
46 public boolean oStart;
47 public boolean oEnd;
48 public BitSet inclusions;
49 public BitSet exclusions;
50 public int type = ANY;
51 public ContentModel content;
52 public AttributeList atts;
53
54 static int maxIndex = 0;
55
56 /**
57 * A field to store user data. Mostly used to store
58 * style sheets.
59 */
60 public Object data;
61
62 Element() {
63 }
64
65 /**
66 * Create a new element.
67 */
68 Element(String name, int index) {
69 this.name = name;
70 this.index = index;
71 maxIndex = Math.max(maxIndex, index);
72 }
73
74 /**
75 * Get the name of the element.
76 */
77 public String getName() {
78 return name;
79 }
80
81 /**
82 * Return true if the start tag can be omitted.
83 */
84 public boolean omitStart() {
85 return oStart;
86 }
87
88 /**
89 * Return true if the end tag can be omitted.
90 */
91 public boolean omitEnd() {
92 return oEnd;
93 }
94
95 /**
96 * Get type.
97 */
98 public int getType() {
99 return type;
100 }
101
102 /**
103 * Get content model
104 */
105 public ContentModel getContent() {
106 return content;
107 }
108
109 /**
110 * Get the attributes.
111 */
112 public AttributeList getAttributes() {
113 return atts;
114 }
115
116 /**
117 * Get index.
118 */
119 public int getIndex() {
120 return index;
121 }
122
123 /**
124 * Check if empty
125 */
126 public boolean isEmpty() {
127 return type == EMPTY;
128 }
129
130 /**
131 * Convert to a string.
132 */
133 public String toString() {
134 return name;
135 }
136
137 /**
138 * Get an attribute by name.
139 */
140 public AttributeList getAttribute(String name) {
141 for (AttributeList a = atts ; a != null ; a = a.next) {
142 if (a.name.equals(name)) {
143 return a;
144 }
145 }
146 return null;
147 }
148
149 /**
150 * Get an attribute by value.
151 */
152 public AttributeList getAttributeByValue(String name) {
153 for (AttributeList a = atts ; a != null ; a = a.next) {
154 if ((a.values != null) && a.values.contains(name)) {
155 return a;
156 }
157 }
158 return null;
159 }
160
161
162 static Hashtable contentTypes = new Hashtable();
163
164 static {
165 contentTypes.put("CDATA", Integer.valueOf(CDATA));
166 contentTypes.put("RCDATA", Integer.valueOf(RCDATA));
167 contentTypes.put("EMPTY", Integer.valueOf(EMPTY));
168 contentTypes.put("ANY", Integer.valueOf(ANY));
169 }
170
171 public static int name2type(String nm) {
172 Integer val = (Integer)contentTypes.get(nm);
173 return (val != null) ? val.intValue() : 0;
174 }
175 }
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