1 /*
2 * Copyright (C) 2004, 2008 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "HTMLInterchange.h"
28
29 #include "Text.h"
30 #include "TextIterator.h"
31 #include <wtf/StdLibExtras.h>
32 #include <wtf/unicode/CharacterNames.h>
33
34 namespace WebCore {
35
36 namespace {
37
convertedSpaceString()38 String convertedSpaceString()
39 {
40 DEFINE_STATIC_LOCAL(String, convertedSpaceString, ());
41 if (convertedSpaceString.isNull()) {
42 convertedSpaceString = "<span class=\"";
43 convertedSpaceString += AppleConvertedSpace;
44 convertedSpaceString += "\">";
45 convertedSpaceString.append(noBreakSpace);
46 convertedSpaceString += "</span>";
47 }
48 return convertedSpaceString;
49 }
50
51 } // end anonymous namespace
52
convertHTMLTextToInterchangeFormat(const String & in,const Text * node)53 String convertHTMLTextToInterchangeFormat(const String& in, const Text* node)
54 {
55 // Assume all the text comes from node.
56 if (node->renderer() && node->renderer()->style()->preserveNewline())
57 return in;
58
59 Vector<UChar> s;
60
61 unsigned i = 0;
62 unsigned consumed = 0;
63 while (i < in.length()) {
64 consumed = 1;
65 if (isCollapsibleWhitespace(in[i])) {
66 // count number of adjoining spaces
67 unsigned j = i + 1;
68 while (j < in.length() && isCollapsibleWhitespace(in[j]))
69 j++;
70 unsigned count = j - i;
71 consumed = count;
72 while (count) {
73 unsigned add = count % 3;
74 switch (add) {
75 case 0:
76 append(s, convertedSpaceString());
77 s.append(' ');
78 append(s, convertedSpaceString());
79 add = 3;
80 break;
81 case 1:
82 if (i == 0 || i + 1 == in.length()) // at start or end of string
83 append(s, convertedSpaceString());
84 else
85 s.append(' ');
86 break;
87 case 2:
88 if (i == 0) {
89 // at start of string
90 append(s, convertedSpaceString());
91 s.append(' ');
92 } else if (i + 2 == in.length()) {
93 // at end of string
94 append(s, convertedSpaceString());
95 append(s, convertedSpaceString());
96 } else {
97 append(s, convertedSpaceString());
98 s.append(' ');
99 }
100 break;
101 }
102 count -= add;
103 }
104 } else
105 s.append(in[i]);
106 i += consumed;
107 }
108
109 return String::adopt(s);
110 }
111
112 } // namespace WebCore
113