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1
9
10 package org.jboss.portal.format.parser.html;
11
12 import java.util.Iterator  ;
13
14 import org.jboss.portal.format.parser.AbstractParser;
15 import org.jboss.portal.format.parser.ParseEvent;
16 import org.jboss.portal.format.parser.TextEvent;
17 import org.jboss.portal.format.parser.Token;
18 import org.jboss.portal.format.parser.bbcode.BBCodeParser;
19 import org.jboss.portal.format.parser.chars.MutableChars;
20 import org.jboss.portal.format.util.Stack;
21
22
26 public class TagParser
27 extends AbstractParser
28 {
29
30 public static final int EVENT_NORMAL = 0;
31 public static final int EVENT_TAG = 1;
32
33 private MutableChars buffer = new MutableChars();
34 private Analyzer analyzer = new Analyzer(BBCodeParser.NULL_READER);
35
36 private OpenEvent openEvent = new OpenEvent();
37 private TextEvent textEvent = new TextEvent();
38
39 private Stack stack = new Stack(10)
40 {
41 protected Stack.Key createKey()
42 {
43 return new CloseEvent();
44 }
45 protected boolean equals(Stack.Key o1, Stack.Key o2)
46 {
47 HTMLKey key1 = (HTMLKey)o1;
48 HTMLKey key2 = (HTMLKey)o2;
49 if (key1.getType() != key2.getType())
50 {
51 return false;
52 }
53 if (key1.getType() == 1)
54 {
55 return key1.getTag().equals(key2.getTag());
56 }
57 return false;
58 }
59 };
60
61 public TagParser()
62 {
63 }
64
65 private HTMLKey temporaryKey = new HTMLKey();
66
67 public void parse(char[] chars, int off, int len)
68 {
69
70 stack.reset();
72 analyzer.reset(chars, off, len);
73 buffer.reset();
74
75 CloseEvent closeEvent = (CloseEvent)stack.push();
77 closeEvent.type = openEvent.type = EVENT_NORMAL;
78 closeEvent.tag = openEvent.tag = null;
79 openEvent.attributes = null;
80 handler.handle(openEvent);
81
82 while (true)
83 {
84 Token t = analyzer.next();
86
87 if (t == null)
88 {
89 break;
91 }
92
93 switch (t.type)
94 {
95 case Analyzer.STAG:
96 {
97 closeEvent = (CloseEvent)stack.push();
98 String tag = t.value;
99 int start = 1;
100 int end = tag.indexOf(' ', 1);
101 if (end == -1)
102 {
103 openEvent.type = closeEvent.type = EVENT_TAG;
104 openEvent.tag = closeEvent.tag = tag.substring(start, tag.length() - 1);
105 openEvent.attributes = "";
106 }
107 else
108 {
109 openEvent.type = closeEvent.type = EVENT_TAG;
110 openEvent.tag = closeEvent.tag = tag.substring(start, end);
111 openEvent.attributes = tag.substring(end, tag.length() - 1);
112 }
113 text();
114 handler.handle(openEvent);
115 break;
116 }
117 case Analyzer.ETAG:
118 {
119 temporaryKey.type = 1;
120 temporaryKey.tag = t.value.substring(2, t.value.length() - 1);
121 Iterator i = stack.pop(temporaryKey);
122 if (i.hasNext())
123 {
124 text();
125 do
126 {
127 handler.handle((CloseEvent)i.next());
128 }
129 while (i.hasNext());
130 }
131 break;
132 }
133 case Analyzer.EMPTY:
134 {
135 break;
145 }
146 case Analyzer.CDATA:
147 buffer.append(t.value.charAt(0));
148 break;
149 default:
150 throw new IllegalStateException ("Unexpected token : " + t.type);
151 }
152 }
153
154 text();
156 temporaryKey.type = EVENT_NORMAL;
157 Iterator i = stack.pop(temporaryKey);
158 while (i.hasNext())
159 {
160 handler.handle((CloseEvent)i.next());
161 }
162 }
163
164 private void text()
165 {
166 if (buffer.length() > 0)
167 {
168 textEvent.setText(buffer.chars(), 0, buffer.length());
169 buffer.reset();
170 handler.handle(textEvent);
171 }
172 }
173
174 private static class HTMLKey implements Stack.Key
175 {
176 int type;
177 String tag;
178 private HTMLKey()
179 {
180 type = -1;
181 tag = null;
182 }
183 public int getType()
184 {
185 return type;
186 }
187 public String getTag()
188 {
189 return tag;
190 }
191 }
192
193 public static class OpenEvent extends HTMLKey implements ParseEvent
194 {
195 private String attributes;
196 public String getAttribute()
197 {
198 return attributes;
199 }
200 }
201
202 public static class CloseEvent extends HTMLKey implements ParseEvent
203 {
204 }
205 }
206 |
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