1 /*
2 * (C) 1999-2003 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21 #include "config.h"
22 #include "FontFamilyValue.h"
23
24 namespace WebCore {
25
26 // FIXME: This appears identical to isCSSTokenizerIdentifier from CSSPrimitiveValue.cpp, we should use a single function.
isValidCSSIdentifier(const String & string)27 static bool isValidCSSIdentifier(const String& string)
28 {
29 unsigned length = string.length();
30 if (!length)
31 return false;
32
33 const UChar* characters = string.characters();
34 UChar c = characters[0];
35 if (!(c == '_' || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '-' || c >= 0x80))
36 return false;
37
38 for (unsigned i = 1; i < length; ++i) {
39 c = characters[i];
40 if (!(c == '_' || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || c == '-' || c >= 0x80))
41 return false;
42 }
43
44 return true;
45 }
46
47 // Quotes the string if it needs quoting.
48 // We use single quotes because serialization code uses double quotes, and it's nice to
49 // avoid having to turn all the quote marks into " as we would have to.
quoteStringIfNeeded(const String & string)50 static String quoteStringIfNeeded(const String& string)
51 {
52 if (isValidCSSIdentifier(string))
53 return string;
54
55 // FIXME: Also need to transform control characters (00-1F) into \ sequences.
56 // FIXME: This is inefficient -- should use a Vector<UChar> instead.
57 String quotedString = string;
58 quotedString.replace('\\', "\\\\");
59 quotedString.replace('\'', "\\'");
60 return "'" + quotedString + "'";
61 }
62
FontFamilyValue(const String & familyName)63 FontFamilyValue::FontFamilyValue(const String& familyName)
64 : CSSPrimitiveValue(String(), CSS_STRING)
65 , m_familyName(familyName)
66 {
67 // If there is anything in parentheses or square brackets at the end, delete it.
68 // FIXME: Do we really need this? The original code mentioned "a language tag in
69 // braces at the end" and "[Xft] qualifiers", but it's not clear either of those
70 // is in active use on the web.
71 unsigned length = m_familyName.length();
72 while (length >= 3) {
73 UChar startCharacter = 0;
74 switch (m_familyName[length - 1]) {
75 case ']':
76 startCharacter = '[';
77 break;
78 case ')':
79 startCharacter = '(';
80 break;
81 }
82 if (!startCharacter)
83 break;
84 unsigned first = 0;
85 for (unsigned i = length - 2; i > 0; --i) {
86 if (m_familyName[i - 1] == ' ' && m_familyName[i] == startCharacter)
87 first = i - 1;
88 }
89 if (!first)
90 break;
91 length = first;
92 }
93 m_familyName.truncate(length);
94 }
95
appendSpaceSeparated(const UChar * characters,unsigned length)96 void FontFamilyValue::appendSpaceSeparated(const UChar* characters, unsigned length)
97 {
98 m_familyName.append(' ');
99 m_familyName.append(characters, length);
100 }
101
cssText() const102 String FontFamilyValue::cssText() const
103 {
104 return quoteStringIfNeeded(m_familyName);
105 }
106
107 }
108