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
|
/*
* Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
* Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#import "config.h"
#import "FontCache.h"
#import "Font.h"
#import "SimpleFontData.h"
#import "FontPlatformData.h"
#import "WebCoreSystemInterface.h"
#import "WebFontCache.h"
#import <AppKit/AppKit.h>
#import <wtf/MainThread.h>
#import <wtf/StdLibExtras.h>
namespace WebCore {
// The "void*" parameter makes the function match the prototype for callbacks from callOnMainThread.
static void invalidateFontCache(void*)
{
if (!isMainThread()) {
callOnMainThread(&invalidateFontCache, 0);
return;
}
fontCache()->invalidate();
}
static void fontCacheRegisteredFontsChangedNotificationCallback(CFNotificationCenterRef, void* observer, CFStringRef name, const void *, CFDictionaryRef)
{
ASSERT_UNUSED(observer, observer == fontCache());
ASSERT_UNUSED(name, CFEqual(name, kCTFontManagerRegisteredFontsChangedNotification));
invalidateFontCache(0);
}
void FontCache::platformInit()
{
wkSetUpFontCache();
CFNotificationCenterAddObserver(CFNotificationCenterGetLocalCenter(), this, fontCacheRegisteredFontsChangedNotificationCallback, kCTFontManagerRegisteredFontsChangedNotification, 0, CFNotificationSuspensionBehaviorDeliverImmediately);
}
static int toAppKitFontWeight(FontWeight fontWeight)
{
static int appKitFontWeights[] = {
2, // FontWeight100
3, // FontWeight200
4, // FontWeight300
5, // FontWeight400
6, // FontWeight500
8, // FontWeight600
9, // FontWeight700
10, // FontWeight800
12, // FontWeight900
};
return appKitFontWeights[fontWeight];
}
static inline bool isAppKitFontWeightBold(NSInteger appKitFontWeight)
{
return appKitFontWeight >= 7;
}
PassRefPtr<SimpleFontData> FontCache::systemFallbackForCharacters(const FontDescription& description, const SimpleFontData* originalFontData, bool isPlatformFont, const UChar* characters, int length)
{
UChar32 character;
U16_GET(characters, 0, 0, length, character);
const FontPlatformData& platformData = originalFontData->platformData();
NSFont *nsFont = platformData.font();
NSString *string = [[NSString alloc] initWithCharactersNoCopy:const_cast<UChar*>(characters) length:length freeWhenDone:NO];
NSFont *substituteFont = wkGetFontInLanguageForRange(nsFont, string, NSMakeRange(0, length));
[string release];
if (!substituteFont && length == 1)
substituteFont = wkGetFontInLanguageForCharacter(nsFont, characters[0]);
if (!substituteFont)
return 0;
// Use the family name from the AppKit-supplied substitute font, requesting the
// traits, weight, and size we want. One way this does better than the original
// AppKit request is that it takes synthetic bold and oblique into account.
// But it does create the possibility that we could end up with a font that
// doesn't actually cover the characters we need.
NSFontManager *fontManager = [NSFontManager sharedFontManager];
NSFontTraitMask traits;
NSInteger weight;
CGFloat size;
if (nsFont) {
traits = [fontManager traitsOfFont:nsFont];
if (platformData.m_syntheticBold)
traits |= NSBoldFontMask;
if (platformData.m_syntheticOblique)
traits |= NSFontItalicTrait;
weight = [fontManager weightOfFont:nsFont];
size = [nsFont pointSize];
} else {
// For custom fonts nsFont is nil.
traits = description.italic() ? NSFontItalicTrait : 0;
weight = toAppKitFontWeight(description.weight());
size = description.computedPixelSize();
}
NSFontTraitMask substituteFontTraits = [fontManager traitsOfFont:substituteFont];
NSInteger substituteFontWeight = [fontManager weightOfFont:substituteFont];
if (traits != substituteFontTraits || weight != substituteFontWeight || !nsFont) {
if (NSFont *bestVariation = [fontManager fontWithFamily:[substituteFont familyName] traits:traits weight:weight size:size]) {
if (!nsFont || (([fontManager traitsOfFont:bestVariation] != substituteFontTraits || [fontManager weightOfFont:bestVariation] != substituteFontWeight)
&& [[bestVariation coveredCharacterSet] longCharacterIsMember:character]))
substituteFont = bestVariation;
}
}
substituteFont = description.usePrinterFont() ? [substituteFont printerFont] : [substituteFont screenFont];
substituteFontTraits = [fontManager traitsOfFont:substituteFont];
substituteFontWeight = [fontManager weightOfFont:substituteFont];
FontPlatformData alternateFont(substituteFont, platformData.size(), platformData.isPrinterFont(),
!isPlatformFont && isAppKitFontWeightBold(weight) && !isAppKitFontWeightBold(substituteFontWeight),
!isPlatformFont && (traits & NSFontItalicTrait) && !(substituteFontTraits & NSFontItalicTrait),
platformData.m_orientation);
return getCachedFontData(&alternateFont, DoNotRetain);
}
PassRefPtr<SimpleFontData> FontCache::similarFontPlatformData(const FontDescription& description)
{
// Attempt to find an appropriate font using a match based on
// the presence of keywords in the the requested names. For example, we'll
// match any name that contains "Arabic" to Geeza Pro.
RefPtr<SimpleFontData> simpleFontData;
for (unsigned i = 0; i < description.familyCount(); ++i) {
const AtomicString& family = description.familyAt(i);
if (family.isEmpty())
continue;
static String* matchWords[3] = { new String("Arabic"), new String("Pashto"), new String("Urdu") };
DEFINE_STATIC_LOCAL(AtomicString, geezaStr, ("Geeza Pro", AtomicString::ConstructFromLiteral));
for (int j = 0; j < 3 && !simpleFontData; ++j)
if (family.contains(*matchWords[j], false))
simpleFontData = getCachedFontData(description, geezaStr);
}
return simpleFontData.release();
}
PassRefPtr<SimpleFontData> FontCache::getLastResortFallbackFont(const FontDescription& fontDescription, ShouldRetain shouldRetain)
{
DEFINE_STATIC_LOCAL(AtomicString, timesStr, ("Times", AtomicString::ConstructFromLiteral));
// FIXME: Would be even better to somehow get the user's default font here. For now we'll pick
// the default that the user would get without changing any prefs.
RefPtr<SimpleFontData> simpleFontData = getCachedFontData(fontDescription, timesStr, false, shouldRetain);
if (simpleFontData)
return simpleFontData.release();
// The Times fallback will almost always work, but in the highly unusual case where
// the user doesn't have it, we fall back on Lucida Grande because that's
// guaranteed to be there, according to Nathan Taylor. This is good enough
// to avoid a crash at least.
DEFINE_STATIC_LOCAL(AtomicString, lucidaGrandeStr, ("Lucida Grande", AtomicString::ConstructFromLiteral));
return getCachedFontData(fontDescription, lucidaGrandeStr, false, shouldRetain);
}
void FontCache::getTraitsInFamily(const AtomicString& familyName, Vector<unsigned>& traitsMasks)
{
[WebFontCache getTraits:traitsMasks inFamily:familyName];
}
PassOwnPtr<FontPlatformData> FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& family)
{
NSFontTraitMask traits = fontDescription.italic() ? NSFontItalicTrait : 0;
NSInteger weight = toAppKitFontWeight(fontDescription.weight());
float size = fontDescription.computedPixelSize();
NSFont *nsFont = [WebFontCache fontWithFamily:family traits:traits weight:weight size:size];
if (!nsFont)
return nullptr;
NSFontManager *fontManager = [NSFontManager sharedFontManager];
NSFontTraitMask actualTraits = 0;
if (fontDescription.italic())
actualTraits = [fontManager traitsOfFont:nsFont];
NSInteger actualWeight = [fontManager weightOfFont:nsFont];
NSFont *platformFont = fontDescription.usePrinterFont() ? [nsFont printerFont] : [nsFont screenFont];
bool syntheticBold = isAppKitFontWeightBold(weight) && !isAppKitFontWeightBold(actualWeight);
bool syntheticOblique = (traits & NSFontItalicTrait) && !(actualTraits & NSFontItalicTrait);
OwnPtr<FontPlatformData> platformData = adoptPtr(new FontPlatformData(platformFont, size, fontDescription.usePrinterFont(), syntheticBold, syntheticOblique, fontDescription.orientation(), fontDescription.widthVariant()));
return platformData.release();
}
} // namespace WebCore
|
