1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/*
* $Id$
* ============================================================================
* The Apache Software License, Version 1.1
* ============================================================================
*
* Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modifica-
* tion, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The end-user documentation included with the redistribution, if any, must
* include the following acknowledgment: "This product includes software
* developed by the Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself, if
* and wherever such third-party acknowledgments normally appear.
*
* 4. The names "FOP" and "Apache Software Foundation" must not be used to
* endorse or promote products derived from this software without prior
* written permission. For written permission, please contact
* apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache", nor may
* "Apache" appear in their name, without prior written permission of the
* Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
* DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ============================================================================
*
* This software consists of voluntary contributions made by many individuals
* on behalf of the Apache Software Foundation and was originally created by
* James Tauber <jtauber@jtauber.com>. For more information on the Apache
* Software Foundation, please see <http://www.apache.org/>.
*/
/*
* This file is part of the RTF library of the FOP project, which was originally
* created by Bertrand Delacretaz <bdelacretaz@codeconsult.ch> and by other
* contributors to the jfor project (www.jfor.org), who agreed to donate jfor to
* the FOP project.
*/
package org.apache.fop.rtf.rtflib.rtfdoc;
import java.util.Iterator;
import java.util.StringTokenizer;
/** Collapses whitespace of an RtfContainer that contains RtfText elements
* @author Bertrand Delacretaz bdelacretaz@codeconsult.ch
*/
class WhitespaceCollapser {
private static final String SPACE = " ";
private boolean lastEndSpace = true;
/** remove extra whitespace in RtfText elements that are inside c */
WhitespaceCollapser(RtfContainer c) {
// process all texts
for (Iterator it = c.getChildren().iterator(); it.hasNext();) {
RtfText current = null;
final Object kid = it.next();
if (kid instanceof RtfText) {
current = (RtfText)kid;
processText(current);
} else {
// if there is something between two texts, it counts for a space
lastEndSpace = true;
}
}
}
/** process one RtfText from our container */
private void processText(RtfText txt) {
final String orig = txt.getText();
// tokenize the text based on whitespace and regenerate it so as
// to collapse multiple spaces into one
if (orig != null && orig.length() > 0) {
final boolean allSpaces = orig.trim().length() == 0;
final boolean endSpace = allSpaces
|| Character.isWhitespace(orig.charAt(orig.length() - 1));
final boolean beginSpace = Character.isWhitespace(orig.charAt(0));
final StringBuffer sb = new StringBuffer(orig.length());
// if text contains spaces only, keep at most one
if (allSpaces) {
if (!lastEndSpace) {
sb.append(SPACE);
}
} else {
// TODO to be compatible with different Locales, should use Character.isWhitespace
// instead of this limited list
boolean first = true;
final StringTokenizer stk = new StringTokenizer(txt.getText(), " \t\n\r");
while (stk.hasMoreTokens()) {
if (first && beginSpace && !lastEndSpace) {
sb.append(SPACE);
}
first = false;
sb.append(stk.nextToken());
if (stk.hasMoreTokens() || endSpace) {
sb.append(SPACE);
}
}
}
txt.setText(sb.toString());
lastEndSpace = endSpace;
}
}
}
|
