1 /*
2 Copyright (C) 2008 Holger Hans Peter Freyther
3 Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
4 Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies)
5
6 This library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public
8 License as published by the Free Software Foundation; either
9 version 2 of the License, or (at your option) any later version.
10
11 This library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
15
16 You should have received a copy of the GNU Library General Public License
17 along with this library; see the file COPYING.LIB. If not, write to
18 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 Boston, MA 02110-1301, USA.
20
21 */
22
23 #include "config.h"
24 #include "FontPlatformData.h"
25
26 #include "PlatformString.h"
27
28 namespace WebCore {
29
toQFontWeight(FontWeight fontWeight)30 static inline QFont::Weight toQFontWeight(FontWeight fontWeight)
31 {
32 switch (fontWeight) {
33 case FontWeight100:
34 case FontWeight200:
35 return QFont::Light; // QFont::Light == Weight of 25
36 case FontWeight600:
37 return QFont::DemiBold; // QFont::DemiBold == Weight of 63
38 case FontWeight700:
39 case FontWeight800:
40 return QFont::Bold; // QFont::Bold == Weight of 75
41 case FontWeight900:
42 return QFont::Black; // QFont::Black == Weight of 87
43 case FontWeight300:
44 case FontWeight400:
45 case FontWeight500:
46 default:
47 return QFont::Normal; // QFont::Normal == Weight of 50
48 }
49 }
50
isEmptyValue(const float size,const bool bold,const bool oblique)51 static inline bool isEmptyValue(const float size, const bool bold, const bool oblique)
52 {
53 // this is the empty value by definition of the trait FontDataCacheKeyTraits
54 return !bold && !oblique && size == 0.f;
55 }
56
FontPlatformData(float size,bool bold,bool oblique)57 FontPlatformData::FontPlatformData(float size, bool bold, bool oblique)
58 {
59 if (!isEmptyValue(size, bold, oblique))
60 m_data = adoptRef(new FontPlatformDataPrivate(size, bold, oblique));
61 }
62
FontPlatformData(const FontDescription & description,const AtomicString & familyName,int wordSpacing,int letterSpacing)63 FontPlatformData::FontPlatformData(const FontDescription& description, const AtomicString& familyName, int wordSpacing, int letterSpacing)
64 : m_data(adoptRef(new FontPlatformDataPrivate()))
65 {
66 QFont& font = m_data->font;
67 int requestedSize = qRound(description.computedPixelSize());
68 font.setFamily(familyName);
69 font.setPixelSize(qRound(requestedSize));
70 font.setItalic(description.italic());
71 font.setWeight(toQFontWeight(description.weight()));
72 font.setWordSpacing(wordSpacing);
73 font.setLetterSpacing(QFont::AbsoluteSpacing, letterSpacing);
74 const bool smallCaps = description.smallCaps();
75 font.setCapitalization(smallCaps ? QFont::SmallCaps : QFont::MixedCase);
76 font.setStyleStrategy(QFont::ForceIntegerMetrics);
77
78 m_data->bold = font.bold();
79 // WebKit allows font size zero but QFont does not. We will return
80 // m_data->size if a font size of zero is requested and pixelSize()
81 // otherwise.
82 m_data->size = (!requestedSize) ? requestedSize : font.pixelSize();
83 }
84
operator ==(const FontPlatformData & other) const85 bool FontPlatformData::operator==(const FontPlatformData& other) const
86 {
87 if (m_data == other.m_data)
88 return true;
89
90 if (!m_data || !other.m_data || m_data->isDeletedValue || other.m_data->isDeletedValue)
91 return false;
92
93 const bool equals = (m_data->size == other.m_data->size
94 && m_data->bold == other.m_data->bold
95 && m_data->oblique == other.m_data->oblique
96 && m_data->font == other.m_data->font);
97 return equals;
98 }
99
hash() const100 unsigned FontPlatformData::hash() const
101 {
102 if (!m_data)
103 return 0;
104 if (m_data->isDeletedValue)
105 return 1;
106 return qHash(m_data->font.toString())
107 ^ qHash(*reinterpret_cast<quint32*>(&m_data->size))
108 ^ qHash(m_data->bold)
109 ^ qHash(m_data->oblique);
110 }
111
112 #ifndef NDEBUG
description() const113 String FontPlatformData::description() const
114 {
115 return String();
116 }
117 #endif
118
119 }
120