1 /*
2 * Copyright (c) 2010 Google 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 are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "CSSOMUtils.h"
33
34 #include <wtf/HexNumber.h>
35
36 namespace WebCore {
37
appendCharacter(UChar32 c,Vector<UChar> & appendTo)38 static void appendCharacter(UChar32 c, Vector<UChar>& appendTo)
39 {
40 if (U16_LENGTH(c) == 1)
41 appendTo.append(static_cast<UChar>(c));
42 else {
43 appendTo.append(U16_LEAD(c));
44 appendTo.append(U16_TRAIL(c));
45 }
46 }
47
serializeCharacter(UChar32 c,Vector<UChar> & appendTo)48 void serializeCharacter(UChar32 c, Vector<UChar>& appendTo)
49 {
50 appendTo.append('\\');
51 appendCharacter(c, appendTo);
52 }
53
serializeCharacterAsCodePoint(UChar32 c,Vector<UChar> & appendTo)54 void serializeCharacterAsCodePoint(UChar32 c, Vector<UChar>& appendTo)
55 {
56 appendTo.append('\\');
57 appendUnsignedAsHex(c, appendTo, Lowercase);
58 appendTo.append(' ');
59 }
60
serializeIdentifier(const String & identifier,String & appendTo)61 void serializeIdentifier(const String& identifier, String& appendTo)
62 {
63 Vector<UChar> addend;
64 serializeIdentifier(identifier, addend);
65 appendTo.append(String::adopt(addend));
66 }
67
serializeIdentifier(const String & identifier,Vector<UChar> & appendTo)68 void serializeIdentifier(const String& identifier, Vector<UChar>& appendTo)
69 {
70 bool isFirst = true;
71 bool isSecond = false;
72 bool isFirstCharHyphen = false;
73 unsigned index = 0;
74 while (index < identifier.length()) {
75 UChar32 c = identifier.characterStartingAt(index);
76 index += U16_LENGTH(c);
77
78 if (c <= 0x1f || (0x30 <= c && c <= 0x39 && (isFirst || (isSecond && isFirstCharHyphen))))
79 serializeCharacterAsCodePoint(c, appendTo);
80 else if (c == 0x2d && isSecond && isFirstCharHyphen)
81 serializeCharacter(c, appendTo);
82 else if (0x80 <= c || c == 0x2d || c == 0x5f || (0x30 <= c && c <= 0x39) || (0x41 <= c && c <= 0x5a) || (0x61 <= c && c <= 0x7a))
83 appendCharacter(c, appendTo);
84 else
85 serializeCharacter(c, appendTo);
86
87 if (isFirst) {
88 isFirst = false;
89 isSecond = true;
90 isFirstCharHyphen = (c == 0x2d);
91 } else if (isSecond) {
92 isSecond = false;
93 }
94 }
95 }
96
serializeString(const String & string,String & appendTo)97 void serializeString(const String& string, String& appendTo)
98 {
99 Vector<UChar> addend;
100 serializeString(string, addend);
101 appendTo.append(String::adopt(addend));
102 }
103
serializeString(const String & string,Vector<UChar> & appendTo)104 void serializeString(const String& string, Vector<UChar>& appendTo)
105 {
106 appendTo.append('\"');
107
108 unsigned index = 0;
109 while (index < string.length()) {
110 UChar32 c = string.characterStartingAt(index);
111 index += U16_LENGTH(c);
112 if (c <= 0x1f)
113 serializeCharacterAsCodePoint(c, appendTo);
114 else if (c == 0x22 || c == 0x5c)
115 serializeCharacter(c, appendTo);
116 else
117 appendCharacter(c, appendTo);
118 }
119
120 appendTo.append('\"');
121 }
122
123 } // namespace WebCore
124