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 "core/css/CSSOMUtils.h"
33
34#include "wtf/HexNumber.h"
35#include "wtf/text/StringBuilder.h"
36
37namespace blink {
38
39void serializeCharacter(UChar32 c, StringBuilder& appendTo)
40{
41    appendTo.append('\\');
42    appendTo.append(c);
43}
44
45void serializeCharacterAsCodePoint(UChar32 c, StringBuilder& appendTo)
46{
47    appendTo.append('\\');
48    appendUnsignedAsHex(c, appendTo, Lowercase);
49    appendTo.append(' ');
50}
51
52void serializeIdentifier(const String& identifier, StringBuilder& appendTo)
53{
54    bool isFirst = true;
55    bool isSecond = false;
56    bool isFirstCharHyphen = false;
57    unsigned index = 0;
58    while (index < identifier.length()) {
59        UChar32 c = identifier.characterStartingAt(index);
60        index += U16_LENGTH(c);
61
62        if (c <= 0x1f || (0x30 <= c && c <= 0x39 && (isFirst || (isSecond && isFirstCharHyphen))))
63            serializeCharacterAsCodePoint(c, appendTo);
64        else if (c == 0x2d && isSecond && isFirstCharHyphen)
65            serializeCharacter(c, appendTo);
66        else if (0x80 <= c || c == 0x2d || c == 0x5f || (0x30 <= c && c <= 0x39) || (0x41 <= c && c <= 0x5a) || (0x61 <= c && c <= 0x7a))
67            appendTo.append(c);
68        else
69            serializeCharacter(c, appendTo);
70
71        if (isFirst) {
72            isFirst = false;
73            isSecond = true;
74            isFirstCharHyphen = (c == 0x2d);
75        } else if (isSecond) {
76            isSecond = false;
77        }
78    }
79}
80
81void serializeString(const String& string, StringBuilder& appendTo)
82{
83    appendTo.append('\"');
84
85    unsigned index = 0;
86    while (index < string.length()) {
87        UChar32 c = string.characterStartingAt(index);
88        index += U16_LENGTH(c);
89        if (c <= 0x1f)
90            serializeCharacterAsCodePoint(c, appendTo);
91        else if (c == 0x22 || c == 0x5c)
92            serializeCharacter(c, appendTo);
93        else
94            appendTo.append(c);
95    }
96
97    appendTo.append('\"');
98}
99
100} // namespace blink
101