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Java > Open Source Codes > com > lowagie > text > rtf > direct > RtfColorTableParser


1 /**
2  * $Id: RtfColorTableParser.java 2738 2007-05-04 10:04:43Z hallm $
3  * $Name$
4  *
5  * Copyright 2006 by Mark Hall
6  *
7  * The contents of this file are subject to the Mozilla Public License Version 1.1
8  * (the "License"); you may not use this file except in compliance with the License.
9  * You may obtain a copy of the License at http://www.mozilla.org/MPL/
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the License.
14  *
15  * The Original Code is 'iText, a free JAVA-PDF library'.
16  *
17  * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
18  * the Initial Developer are Copyright (C) 1999-2006 by Bruno Lowagie.
19  * All Rights Reserved.
20  * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
21  * are Copyright (C) 2000-2006 by Paulo Soares. All Rights Reserved.
22  *
23  * Contributor(s): all the names of the contributors are added in the source code
24  * where applicable.
25  *
26  * Alternatively, the contents of this file may be used under the terms of the
27  * LGPL license (the ?GNU LIBRARY GENERAL PUBLIC LICENSE?), in which case the
28  * provisions of LGPL are applicable instead of those above. If you wish to
29  * allow use of your version of this file only under the terms of the LGPL
30  * License and not to allow others to use your version of this file under
31  * the MPL, indicate your decision by deleting the provisions above and
32  * replace them with the notice and other provisions required by the LGPL.
33  * If you do not delete the provisions above, a recipient may use your version
34  * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
35  *
36  * This library is free software; you can redistribute it and/or modify it
37  * under the terms of the MPL as stated above or under the terms of the GNU
38  * Library General Public License as published by the Free Software Foundation;
39  * either version 2 of the License, or any later version.
40  *
41  * This library is distributed in the hope that it will be useful, but WITHOUT
42  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
43  * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
44  * details.
45  *
46  * If you didn't download this code from the following link, you should check if
47  * you aren't using an obsolete version:
48  * http://www.lowagie.com/iText/
49  */
50 package com.lowagie.text.rtf.direct;
51
52 import java.awt.Color JavaDoc;
53
54 /**
55  * The RtfColorTableParser handles the events generated
56  * by the RtfTokeniser while the RTF color table is
57  * being parsed.
58  *
59  * @version $Revision: 2738 $
60  * @author Mark Hall (mhall@edu.uni-klu.ac.at)
61  */
62 public class RtfColorTableParser {
63     /**
64      * The RtfImportHeader to add color mappings to.
65      */
66     private RtfImportHeader importHeader = null;
67     /**
68      * The number of the current color being parsed.
69      */
70     private int colorNr = 0;
71     /**
72      * The red component of the current color being parsed.
73      */
74     private int red = -1;
75     /**
76      * The green component of the current color being parsed.
77      */
78     private int green = -1;
79     /**
80      * The blue component of the current color being parsed.
81      */
82     private int blue = -1;
83     
84     /**
85      * Constructs a new RtfColorTableParser.
86      *
87      * @param importHeader The RtfImportHeader to add the color mappings to.
88      */
89     public RtfColorTableParser(RtfImportHeader importHeader) {
90         this.importHeader = importHeader;
91         this.colorNr = 0;
92         this.red = -1;
93         this.green = -1;
94         this.blue = -1;
95     }
96
97     public static boolean stringMatches(String JavaDoc text, String JavaDoc start) {
98         if (!text.startsWith(start))
99             return false;
100         int first = start.length();
101         int last = text.length();
102         if (first == last)
103             return false;
104         for (int k = first; k < last; ++k) {
105             char c = text.charAt(k);
106             if (c < '0' || c > '9')
107                 return false;
108         }
109         return true;
110     }
111     
112     /**
113      * Handle RTF control words. The relevant control words are
114      * \red, \green and \blue each with a number specifying the
115      * value for that component.
116      *
117      * @param ctrlWord The control word to handle.
118      * @param groupLevel Unused
119      */
120     public void handleCtrlWord(String JavaDoc ctrlWord, int groupLevel) {
121         if (stringMatches(ctrlWord, "\\red"))
122             this.red = Integer.parseInt(ctrlWord.substring(4));
123         else if (stringMatches(ctrlWord, "\\green"))
124             this.green = Integer.parseInt(ctrlWord.substring(6));
125         else if (stringMatches(ctrlWord, "\\blue"))
126             this.blue = Integer.parseInt(ctrlWord.substring(5));
127     }
128     
129     /**
130      * Handle text content. This is to find the end of each color
131      * definition, because they are separated by a semicolon (;).
132      *
133      * @param text The text to handle.
134      * @param groupLevel Unused.
135      */
136     public void handleText(String JavaDoc text, int groupLevel) {
137         if(text.indexOf(';') != -1) {
138             if(red != -1 && green != -1 && blue != -1) {
139                 this.importHeader.importColor(Integer.toString(this.colorNr), new Color JavaDoc(this.red, this.green, this.blue));
140             }
141             this.colorNr++;
142         }
143     }
144 }
145
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