1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
|
/*
* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
* (C) 2000 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIother.m_ If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USm_
*
*/
#ifndef FontDescription_h
#define FontDescription_h
#include "platform/FontFamilyNames.h"
#include "platform/fonts/FontCacheKey.h"
#include "platform/fonts/FontFamily.h"
#include "platform/fonts/FontFeatureSettings.h"
#include "platform/fonts/FontOrientation.h"
#include "platform/fonts/FontSmoothingMode.h"
#include "platform/fonts/FontTraits.h"
#include "platform/fonts/FontWidthVariant.h"
#include "platform/fonts/TextRenderingMode.h"
#include "platform/fonts/TypesettingFeatures.h"
#include "platform/text/NonCJKGlyphOrientation.h"
#include "wtf/MathExtras.h"
#include "wtf/RefPtr.h"
#include <unicode/uscript.h>
namespace WebCore {
class PLATFORM_EXPORT FontDescription {
public:
enum GenericFamilyType { NoFamily, StandardFamily, SerifFamily, SansSerifFamily,
MonospaceFamily, CursiveFamily, FantasyFamily, PictographFamily };
enum Kerning { AutoKerning, NormalKerning, NoneKerning };
enum LigaturesState { NormalLigaturesState, DisabledLigaturesState, EnabledLigaturesState };
FontDescription()
: m_locale("en")
, m_specifiedSize(0)
, m_computedSize(0)
, m_letterSpacing(0)
, m_wordSpacing(0)
, m_orientation(Horizontal)
, m_nonCJKGlyphOrientation(NonCJKGlyphOrientationVerticalRight)
, m_widthVariant(RegularWidth)
, m_style(FontStyleNormal)
, m_variant(FontVariantNormal)
, m_isAbsoluteSize(false)
, m_weight(FontWeightNormal)
, m_stretch(FontStretchNormal)
, m_genericFamily(NoFamily)
, m_kerning(AutoKerning)
, m_commonLigaturesState(NormalLigaturesState)
, m_discretionaryLigaturesState(NormalLigaturesState)
, m_historicalLigaturesState(NormalLigaturesState)
, m_contextualLigaturesState(NormalLigaturesState)
, m_keywordSize(0)
, m_fontSmoothing(AutoSmoothing)
, m_textRendering(AutoTextRendering)
, m_script(USCRIPT_COMMON)
, m_syntheticBold(false)
, m_syntheticItalic(false)
, m_subpixelTextPosition(s_useSubpixelTextPositioning)
, m_typesettingFeatures(s_defaultTypesettingFeatures)
{
}
bool operator==(const FontDescription&) const;
bool operator!=(const FontDescription& other) const { return !(*this == other); }
const FontFamily& family() const { return m_familyList; }
FontFamily& firstFamily() { return m_familyList; }
float specifiedSize() const { return m_specifiedSize; }
float computedSize() const { return m_computedSize; }
FontStyle style() const { return static_cast<FontStyle>(m_style); }
int computedPixelSize() const { return int(m_computedSize + 0.5f); }
FontVariant variant() const { return static_cast<FontVariant>(m_variant); }
bool isAbsoluteSize() const { return m_isAbsoluteSize; }
FontWeight weight() const { return static_cast<FontWeight>(m_weight); }
FontStretch stretch() const { return static_cast<FontStretch>(m_stretch); }
FontWeight lighterWeight() const;
FontWeight bolderWeight() const;
GenericFamilyType genericFamily() const { return static_cast<GenericFamilyType>(m_genericFamily); }
// only use fixed default size when there is only one font family, and that family is "monospace"
bool useFixedDefaultSize() const { return genericFamily() == MonospaceFamily && !family().next() && family().family() == FontFamilyNames::webkit_monospace; }
Kerning kerning() const { return static_cast<Kerning>(m_kerning); }
LigaturesState commonLigaturesState() const { return static_cast<LigaturesState>(m_commonLigaturesState); }
LigaturesState discretionaryLigaturesState() const { return static_cast<LigaturesState>(m_discretionaryLigaturesState); }
LigaturesState historicalLigaturesState() const { return static_cast<LigaturesState>(m_historicalLigaturesState); }
LigaturesState contextualLigaturesState() const { return static_cast<LigaturesState>(m_contextualLigaturesState); }
unsigned keywordSize() const { return m_keywordSize; }
FontSmoothingMode fontSmoothing() const { return static_cast<FontSmoothingMode>(m_fontSmoothing); }
TextRenderingMode textRendering() const { return static_cast<TextRenderingMode>(m_textRendering); }
UScriptCode script() const { return static_cast<UScriptCode>(m_script); }
const String& locale() const { return m_locale; }
bool isSyntheticBold() const { return m_syntheticBold; }
bool isSyntheticItalic() const { return m_syntheticItalic; }
bool useSubpixelPositioning() const { return m_subpixelTextPosition; }
FontTraits traits() const;
float wordSpacing() const { return m_wordSpacing; }
float letterSpacing() const { return m_letterSpacing; }
FontOrientation orientation() const { return static_cast<FontOrientation>(m_orientation); }
NonCJKGlyphOrientation nonCJKGlyphOrientation() const { return static_cast<NonCJKGlyphOrientation>(m_nonCJKGlyphOrientation); }
FontWidthVariant widthVariant() const { return static_cast<FontWidthVariant>(m_widthVariant); }
FontFeatureSettings* featureSettings() const { return m_featureSettings.get(); }
FontDescription makeNormalFeatureSettings() const;
float effectiveFontSize() const; // Returns either the computedSize or the computedPixelSize
FontCacheKey cacheKey(const AtomicString& familyName, FontTraits desiredTraits = FontTraits(0)) const;
void setFamily(const FontFamily& family) { m_familyList = family; }
void setComputedSize(float s) { m_computedSize = clampToFloat(s); }
void setSpecifiedSize(float s) { m_specifiedSize = clampToFloat(s); }
void setStyle(FontStyle i) { m_style = i; }
void setVariant(FontVariant c) { m_variant = c; }
void setIsAbsoluteSize(bool s) { m_isAbsoluteSize = s; }
void setWeight(FontWeight w) { m_weight = w; }
void setStretch(FontStretch s) { m_stretch = s; }
void setGenericFamily(GenericFamilyType genericFamily) { m_genericFamily = genericFamily; }
void setKerning(Kerning kerning) { m_kerning = kerning; updateTypesettingFeatures(); }
void setCommonLigaturesState(LigaturesState commonLigaturesState) { m_commonLigaturesState = commonLigaturesState; updateTypesettingFeatures(); }
void setDiscretionaryLigaturesState(LigaturesState discretionaryLigaturesState) { m_discretionaryLigaturesState = discretionaryLigaturesState; updateTypesettingFeatures(); }
void setHistoricalLigaturesState(LigaturesState historicalLigaturesState) { m_historicalLigaturesState = historicalLigaturesState; updateTypesettingFeatures(); }
void setContextualLigaturesState(LigaturesState contextualLigaturesState) { m_contextualLigaturesState = contextualLigaturesState; updateTypesettingFeatures(); }
void setKeywordSize(unsigned s) { m_keywordSize = s; }
void setFontSmoothing(FontSmoothingMode smoothing) { m_fontSmoothing = smoothing; }
void setTextRendering(TextRenderingMode rendering) { m_textRendering = rendering; updateTypesettingFeatures(); }
void setOrientation(FontOrientation orientation) { m_orientation = orientation; }
void setNonCJKGlyphOrientation(NonCJKGlyphOrientation orientation) { m_nonCJKGlyphOrientation = orientation; }
void setWidthVariant(FontWidthVariant widthVariant) { m_widthVariant = widthVariant; }
void setScript(UScriptCode s) { m_script = s; }
void setLocale(const String& locale) { m_locale = locale; }
void setSyntheticBold(bool syntheticBold) { m_syntheticBold = syntheticBold; }
void setSyntheticItalic(bool syntheticItalic) { m_syntheticItalic = syntheticItalic; }
void setFeatureSettings(PassRefPtr<FontFeatureSettings> settings) { m_featureSettings = settings; }
void setTraits(FontTraits);
void setWordSpacing(float s) { m_wordSpacing = s; }
void setLetterSpacing(float s) { m_letterSpacing = s; }
TypesettingFeatures typesettingFeatures() const { return static_cast<TypesettingFeatures>(m_typesettingFeatures); }
static void setSubpixelPositioning(bool b) { s_useSubpixelTextPositioning = b; }
static bool subpixelPositioning() { return s_useSubpixelTextPositioning; }
static void setDefaultTypesettingFeatures(TypesettingFeatures);
static TypesettingFeatures defaultTypesettingFeatures();
private:
FontFamily m_familyList; // The list of font families to be used.
RefPtr<FontFeatureSettings> m_featureSettings;
String m_locale;
void updateTypesettingFeatures() const;
float m_specifiedSize; // Specified CSS value. Independent of rendering issues such as integer
// rounding, minimum font sizes, and zooming.
float m_computedSize; // Computed size adjusted for the minimum font size and the zoom factor.
float m_letterSpacing;
float m_wordSpacing;
unsigned m_orientation : 1; // FontOrientation - Whether the font is rendering on a horizontal line or a vertical line.
unsigned m_nonCJKGlyphOrientation : 1; // NonCJKGlyphOrientation - Only used by vertical text. Determines the default orientation for non-ideograph glyphs.
unsigned m_widthVariant : 2; // FontWidthVariant
unsigned m_style : 1; // FontStyle
unsigned m_variant : 1; // FontVariant
unsigned m_isAbsoluteSize : 1; // Whether or not CSS specified an explicit size
// (logical sizes like "medium" don't count).
unsigned m_weight : 4; // FontWeight
unsigned m_stretch : 4; // FontStretch
unsigned m_genericFamily : 3; // GenericFamilyType
unsigned m_kerning : 2; // Kerning
unsigned m_commonLigaturesState : 2;
unsigned m_discretionaryLigaturesState : 2;
unsigned m_historicalLigaturesState : 2;
unsigned m_contextualLigaturesState : 2;
unsigned m_keywordSize : 4; // We cache whether or not a font is currently represented by a CSS keyword (e.g., medium). If so,
// then we can accurately translate across different generic families to adjust for different preference settings
// (e.g., 13px monospace vs. 16px everything else). Sizes are 1-8 (like the HTML size values for <font>).
unsigned m_fontSmoothing : 2; // FontSmoothingMode
unsigned m_textRendering : 2; // TextRenderingMode
unsigned m_script : 7; // Used to help choose an appropriate font for generic font families.
unsigned m_syntheticBold : 1;
unsigned m_syntheticItalic : 1;
unsigned m_subpixelTextPosition : 1;
mutable unsigned m_typesettingFeatures : 2; // TypesettingFeatures
static TypesettingFeatures s_defaultTypesettingFeatures;
static bool s_useSubpixelTextPositioning;
};
inline bool FontDescription::operator==(const FontDescription& other) const
{
return m_familyList == other.m_familyList
&& m_specifiedSize == other.m_specifiedSize
&& m_computedSize == other.m_computedSize
&& m_letterSpacing == other.m_letterSpacing
&& m_wordSpacing == other.m_wordSpacing
&& m_style == other.m_style
&& m_variant == other.m_variant
&& m_isAbsoluteSize == other.m_isAbsoluteSize
&& m_weight == other.m_weight
&& m_stretch == other.m_stretch
&& m_genericFamily == other.m_genericFamily
&& m_kerning == other.m_kerning
&& m_commonLigaturesState == other.m_commonLigaturesState
&& m_discretionaryLigaturesState == other.m_discretionaryLigaturesState
&& m_historicalLigaturesState == other.m_historicalLigaturesState
&& m_contextualLigaturesState == other.m_contextualLigaturesState
&& m_keywordSize == other.m_keywordSize
&& m_fontSmoothing == other.m_fontSmoothing
&& m_textRendering == other.m_textRendering
&& m_orientation == other.m_orientation
&& m_nonCJKGlyphOrientation == other.m_nonCJKGlyphOrientation
&& m_widthVariant == other.m_widthVariant
&& m_script == other.m_script
&& m_syntheticBold == other.m_syntheticBold
&& m_syntheticItalic == other.m_syntheticItalic
&& m_featureSettings == other.m_featureSettings
&& m_subpixelTextPosition == other.m_subpixelTextPosition;
}
}
#endif
|
