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Java > Open Source Codes > org > htmlparser > scanners > StyleScanner


1 // HTMLParser Library $Name: v1_5_20050313 $ - A java-based parser for HTML
2 // http://sourceforge.org/projects/htmlparser
3 // Copyright (C) 2004 Derrick Oswald
4 //
5 // Revision Control Information
6 //
7 // $Source: /cvsroot/htmlparser/htmlparser/src/org/htmlparser/scanners/StyleScanner.java,v $
8 // $Author: derrickoswald $
9 // $Date: 2005/03/07 02:18:46 $
10 // $Revision: 1.39 $
11 //
12 // This library is free software; you can redistribute it and/or
13 // modify it under the terms of the GNU Lesser General Public
14 // License as published by the Free Software Foundation; either
15 // version 2.1 of the License, or (at your option) any later version.
16 //
17 // This library is distributed in the hope that it will be useful,
18 // but WITHOUT ANY WARRANTY; without even the implied warranty of
19 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 // Lesser General Public License for more details.
21 //
22 // You should have received a copy of the GNU Lesser General Public
23 // License along with this library; if not, write to the Free Software
24 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 //
26
27 package org.htmlparser.scanners;
28
29 import java.util.Vector JavaDoc;
30
31 import org.htmlparser.Attribute;
32 import org.htmlparser.Node;
33 import org.htmlparser.NodeFactory;
34 import org.htmlparser.PrototypicalNodeFactory;
35 import org.htmlparser.Remark;
36 import org.htmlparser.Text;
37 import org.htmlparser.lexer.Lexer;
38 import org.htmlparser.Tag;
39 import org.htmlparser.util.NodeList;
40 import org.htmlparser.util.ParserException;
41
42 /**
43  * The StyleScanner handles style elements.
44  * It gathers all interior nodes into one undifferentiated string node.
45  */
46 public class StyleScanner extends CompositeTagScanner
47 {
48     /**
49      * Create a style scanner.
50      */
51     public StyleScanner ()
52     {
53     }
54
55     /**
56      * Scan for style definitions.
57      * Accumulates text from the page, until </[a-zA-Z] is encountered.
58      * @param tag The tag this scanner is responsible for.
59      * @param lexer The source of CDATA.
60      * @param stack The parse stack, <em>not used</em>.
61      */
62     public Tag scan (Tag tag, Lexer lexer, NodeList stack)
63         throws ParserException
64     {
65         Node content;
66         int position;
67         Node node;
68         Attribute attribute;
69         Vector JavaDoc vector;
70
71         content = lexer.parseCDATA ();
72         position = lexer.getPosition ();
73         node = lexer.nextNode (false);
74         if (null != node)
75             if (!(node instanceof Tag) || !( ((Tag)node).isEndTag ()
76                 && ((Tag)node).getTagName ().equals (tag.getIds ()[0])))
77             {
78                 lexer.setPosition (position);
79                 node = null;
80             }
81
82         // build new end tag if required
83 if (null == node)
84         {
85             attribute = new Attribute ("/style", null);
86             vector = new Vector JavaDoc ();
87             vector.addElement (attribute);
88             node = lexer.getNodeFactory ().createTagNode (
89                 lexer.getPage (), position, position, vector);
90         }
91         tag.setEndTag ((Tag)node);
92         if (null != content)
93         {
94             tag.setChildren (new NodeList (content));
95             content.setParent (tag);
96         }
97         node.setParent (tag);
98         tag.doSemanticAction ();
99
100         return (tag);
101     }
102 }
103
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