OLD | NEW |
| (Empty) |
1 /* | |
2 * Copyright (C) 2007, 2008, 2009, 2010, 2011 Apple 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 | |
6 * are met: | |
7 * 1. Redistributions of source code must retain the above copyright | |
8 * notice, this list of conditions and the following disclaimer. | |
9 * 2. Redistributions in binary form must reproduce the above copyright | |
10 * notice, this list of conditions and the following disclaimer in the | |
11 * documentation and/or other materials provided with the distribution. | |
12 * | |
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND AN
Y | |
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR AN
Y | |
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND O
N | |
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
23 */ | |
24 | |
25 #include "config.h" | |
26 | |
27 #include "platform/fonts/mac/ComplexTextController.h" | |
28 | |
29 #include "platform/fonts/Font.h" | |
30 #include "platform/fonts/FontCache.h" | |
31 #include "platform/text/TextRun.h" | |
32 | |
33 #include <ApplicationServices/ApplicationServices.h> | |
34 #import <AvailabilityMacros.h> | |
35 | |
36 // Forward declare Mac SPIs. | |
37 extern "C" { | |
38 // Request for public API: rdar://13803619 | |
39 CTLineRef CTLineCreateWithUniCharProvider(const UniChar* (*provide)(CFIndex stri
ngIndex, CFIndex* charCount, CFDictionaryRef* attributes, void* context), void (
*dispose)(const UniChar* chars, void* context), void* context); | |
40 } | |
41 | |
42 @interface WebCascadeList : NSArray { | |
43 @private | |
44 const blink::Font* _font; | |
45 UChar32 _character; | |
46 NSUInteger _count; | |
47 Vector<RetainPtr<CTFontDescriptorRef>, 16> _fontDescriptors; | |
48 } | |
49 | |
50 - (id)initWithFont:(const blink::Font*)font character:(UChar32)character; | |
51 | |
52 @end | |
53 | |
54 @implementation WebCascadeList | |
55 | |
56 - (id)initWithFont:(const blink::Font*)font character:(UChar32)character | |
57 { | |
58 if (!(self = [super init])) | |
59 return nil; | |
60 | |
61 _font = font; | |
62 _character = character; | |
63 | |
64 // By the time a WebCascadeList is used, the Font has already been asked to
realize all of its | |
65 // FontData, so this loop does not hit the FontCache. | |
66 while (_font->fontDataAt(_count)) | |
67 _count++; | |
68 | |
69 return self; | |
70 } | |
71 | |
72 - (NSUInteger)count | |
73 { | |
74 return _count; | |
75 } | |
76 | |
77 - (id)objectAtIndex:(NSUInteger)index | |
78 { | |
79 CTFontDescriptorRef fontDescriptor; | |
80 if (index < _fontDescriptors.size()) { | |
81 if ((fontDescriptor = _fontDescriptors[index].get())) | |
82 return (id)fontDescriptor; | |
83 } else | |
84 _fontDescriptors.grow(index + 1); | |
85 | |
86 const blink::SimpleFontData* fontData = _font->fontDataAt(index)->fontDataFo
rCharacter(_character); | |
87 fontDescriptor = CTFontCopyFontDescriptor(fontData->platformData().ctFont())
; | |
88 _fontDescriptors[index] = RetainPtr<CTFontDescriptorRef>(AdoptCF, fontDescri
ptor); | |
89 return (id)fontDescriptor; | |
90 } | |
91 | |
92 @end | |
93 | |
94 namespace blink { | |
95 | |
96 ComplexTextController::ComplexTextRun::ComplexTextRun(CTRunRef ctRun, const Simp
leFontData* fontData, const UChar* characters, unsigned stringLocation, size_t s
tringLength, CFRange runRange) | |
97 : m_fontData(fontData) | |
98 , m_characters(characters) | |
99 , m_stringLocation(stringLocation) | |
100 , m_stringLength(stringLength) | |
101 , m_indexBegin(runRange.location) | |
102 , m_indexEnd(runRange.location + runRange.length) | |
103 , m_isLTR(!(CTRunGetStatus(ctRun) & kCTRunStatusRightToLeft)) | |
104 , m_isMonotonic(true) | |
105 { | |
106 m_glyphCount = CTRunGetGlyphCount(ctRun); | |
107 m_coreTextIndices = CTRunGetStringIndicesPtr(ctRun); | |
108 if (!m_coreTextIndices) { | |
109 m_coreTextIndicesVector.grow(m_glyphCount); | |
110 CTRunGetStringIndices(ctRun, CFRangeMake(0, 0), m_coreTextIndicesVector.
data()); | |
111 m_coreTextIndices = m_coreTextIndicesVector.data(); | |
112 } | |
113 | |
114 m_glyphs = CTRunGetGlyphsPtr(ctRun); | |
115 if (!m_glyphs) { | |
116 m_glyphsVector.grow(m_glyphCount); | |
117 CTRunGetGlyphs(ctRun, CFRangeMake(0, 0), m_glyphsVector.data()); | |
118 m_glyphs = m_glyphsVector.data(); | |
119 } | |
120 | |
121 m_advances = CTRunGetAdvancesPtr(ctRun); | |
122 if (!m_advances) { | |
123 m_advancesVector.grow(m_glyphCount); | |
124 CTRunGetAdvances(ctRun, CFRangeMake(0, 0), m_advancesVector.data()); | |
125 m_advances = m_advancesVector.data(); | |
126 } | |
127 } | |
128 | |
129 // Missing glyphs run constructor. Core Text will not generate a run of missing
glyphs, instead falling back on | |
130 // glyphs from LastResort. We want to use the primary font's missing glyph in or
der to match the fast text code path. | |
131 ComplexTextController::ComplexTextRun::ComplexTextRun(const SimpleFontData* font
Data, const UChar* characters, unsigned stringLocation, size_t stringLength, boo
l ltr) | |
132 : m_fontData(fontData) | |
133 , m_characters(characters) | |
134 , m_stringLocation(stringLocation) | |
135 , m_stringLength(stringLength) | |
136 , m_indexBegin(0) | |
137 , m_indexEnd(stringLength) | |
138 , m_isLTR(ltr) | |
139 , m_isMonotonic(true) | |
140 { | |
141 m_coreTextIndicesVector.reserveInitialCapacity(m_stringLength); | |
142 unsigned r = 0; | |
143 while (r < m_stringLength) { | |
144 m_coreTextIndicesVector.uncheckedAppend(r); | |
145 if (U_IS_SURROGATE(m_characters[r])) { | |
146 ASSERT(r + 1 < m_stringLength); | |
147 ASSERT(U_IS_SURROGATE_LEAD(m_characters[r])); | |
148 ASSERT(U_IS_TRAIL(m_characters[r + 1])); | |
149 r += 2; | |
150 } else | |
151 r++; | |
152 } | |
153 m_glyphCount = m_coreTextIndicesVector.size(); | |
154 if (!ltr) { | |
155 for (unsigned r = 0, end = m_glyphCount - 1; r < m_glyphCount / 2; ++r,
--end) | |
156 std::swap(m_coreTextIndicesVector[r], m_coreTextIndicesVector[end]); | |
157 } | |
158 m_coreTextIndices = m_coreTextIndicesVector.data(); | |
159 | |
160 // Synthesize a run of missing glyphs. | |
161 m_glyphsVector.fill(0, m_glyphCount); | |
162 m_glyphs = m_glyphsVector.data(); | |
163 m_advancesVector.fill(CGSizeMake(m_fontData->widthForGlyph(0), 0), m_glyphCo
unt); | |
164 m_advances = m_advancesVector.data(); | |
165 } | |
166 | |
167 struct ProviderInfo { | |
168 const UChar* cp; | |
169 unsigned length; | |
170 CFDictionaryRef attributes; | |
171 }; | |
172 | |
173 static const UniChar* provideStringAndAttributes(CFIndex stringIndex, CFIndex* c
harCount, CFDictionaryRef* attributes, void* refCon) | |
174 { | |
175 ProviderInfo* info = static_cast<struct ProviderInfo*>(refCon); | |
176 if (stringIndex < 0 || static_cast<unsigned>(stringIndex) >= info->length) | |
177 return 0; | |
178 | |
179 *charCount = info->length - stringIndex; | |
180 *attributes = info->attributes; | |
181 return info->cp + stringIndex; | |
182 } | |
183 | |
184 void ComplexTextController::collectComplexTextRunsForCharacters(const UChar* cp,
unsigned length, unsigned stringLocation, const SimpleFontData* fontData) | |
185 { | |
186 if (!fontData) { | |
187 // Create a run of missing glyphs from the primary font. | |
188 m_complexTextRuns.append(ComplexTextRun::create(m_font.primaryFont(), cp
, stringLocation, length, m_run.ltr())); | |
189 return; | |
190 } | |
191 | |
192 bool isSystemFallback = false; | |
193 | |
194 UChar32 baseCharacter = 0; | |
195 RetainPtr<CFDictionaryRef> stringAttributes; | |
196 if (fontData == SimpleFontData::systemFallback()) { | |
197 // FIXME: This code path does not support small caps. | |
198 isSystemFallback = true; | |
199 | |
200 U16_GET(cp, 0, 0, length, baseCharacter); | |
201 fontData = m_font.fontDataAt(0)->fontDataForCharacter(baseCharacter); | |
202 | |
203 RetainPtr<WebCascadeList> cascadeList(AdoptNS, [[WebCascadeList alloc] i
nitWithFont:&m_font character:baseCharacter]); | |
204 | |
205 stringAttributes.adoptCF(CFDictionaryCreateMutableCopy(kCFAllocatorDefau
lt, 0, fontData->getCFStringAttributes(m_font.fontDescription().typesettingFeatu
res(), fontData->platformData().orientation()))); | |
206 static const void* attributeKeys[] = { kCTFontCascadeListAttribute }; | |
207 const void* values[] = { cascadeList.get() }; | |
208 RetainPtr<CFDictionaryRef> attributes(AdoptCF, CFDictionaryCreate(kCFAll
ocatorDefault, attributeKeys, values, sizeof(attributeKeys) / sizeof(*attributeK
eys), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks)); | |
209 RetainPtr<CTFontDescriptorRef> fontDescriptor(AdoptCF, CTFontDescriptorC
reateWithAttributes(attributes.get())); | |
210 RetainPtr<CTFontRef> fontWithCascadeList(AdoptCF, CTFontCreateCopyWithAt
tributes(fontData->platformData().ctFont(), m_font.fontDescription().computedPix
elSize(), 0, fontDescriptor.get())); | |
211 CFDictionarySetValue(const_cast<CFMutableDictionaryRef>(stringAttributes
.get()), kCTFontAttributeName, fontWithCascadeList.get()); | |
212 } else | |
213 stringAttributes = fontData->getCFStringAttributes(m_font.fontDescriptio
n().typesettingFeatures(), fontData->platformData().orientation()); | |
214 | |
215 RetainPtr<CTLineRef> line; | |
216 | |
217 if (!m_mayUseNaturalWritingDirection || m_run.directionalOverride()) { | |
218 static const void* optionKeys[] = { kCTTypesetterOptionForcedEmbeddingLe
vel }; | |
219 const short ltrForcedEmbeddingLevelValue = 0; | |
220 const short rtlForcedEmbeddingLevelValue = 1; | |
221 static const void* ltrOptionValues[] = { CFNumberCreate(kCFAllocatorDefa
ult, kCFNumberShortType, <rForcedEmbeddingLevelValue) }; | |
222 static const void* rtlOptionValues[] = { CFNumberCreate(kCFAllocatorDefa
ult, kCFNumberShortType, &rtlForcedEmbeddingLevelValue) }; | |
223 static CFDictionaryRef ltrTypesetterOptions = CFDictionaryCreate(kCFAllo
catorDefault, optionKeys, ltrOptionValues, WTF_ARRAY_LENGTH(optionKeys), &kCFCop
yStringDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks); | |
224 static CFDictionaryRef rtlTypesetterOptions = CFDictionaryCreate(kCFAllo
catorDefault, optionKeys, rtlOptionValues, WTF_ARRAY_LENGTH(optionKeys), &kCFCop
yStringDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks); | |
225 | |
226 #if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070 | |
227 ProviderInfo info = { cp, length, stringAttributes.get() }; | |
228 RetainPtr<CTTypesetterRef> typesetter(AdoptCF, WKCreateCTTypesetterWithU
niCharProviderAndOptions(&provideStringAndAttributes, 0, &info, m_run.ltr() ? lt
rTypesetterOptions : rtlTypesetterOptions)); | |
229 #else | |
230 RetainPtr<CFStringRef> string(AdoptCF, CFStringCreateWithCharactersNoCop
y(kCFAllocatorDefault, cp, length, kCFAllocatorNull)); | |
231 RetainPtr<CFAttributedStringRef> attributedString(AdoptCF, CFAttributedS
tringCreate(kCFAllocatorDefault, string.get(), stringAttributes.get())); | |
232 RetainPtr<CTTypesetterRef> typesetter(AdoptCF, CTTypesetterCreateWithAtt
ributedStringAndOptions(attributedString.get(), m_run.ltr() ? ltrTypesetterOptio
ns : rtlTypesetterOptions)); | |
233 #endif | |
234 | |
235 line.adoptCF(CTTypesetterCreateLine(typesetter.get(), CFRangeMake(0, 0))
); | |
236 } else { | |
237 ProviderInfo info = { cp, length, stringAttributes.get() }; | |
238 | |
239 line.adoptCF(CTLineCreateWithUniCharProvider(&provideStringAndAttributes
, 0, &info)); | |
240 } | |
241 | |
242 m_coreTextLines.append(line.get()); | |
243 | |
244 CFArrayRef runArray = CTLineGetGlyphRuns(line.get()); | |
245 | |
246 CFIndex runCount = CFArrayGetCount(runArray); | |
247 | |
248 for (CFIndex r = 0; r < runCount; r++) { | |
249 CTRunRef ctRun = static_cast<CTRunRef>(CFArrayGetValueAtIndex(runArray,
m_run.ltr() ? r : runCount - 1 - r)); | |
250 ASSERT(CFGetTypeID(ctRun) == CTRunGetTypeID()); | |
251 CFRange runRange = CTRunGetStringRange(ctRun); | |
252 const SimpleFontData* runFontData = fontData; | |
253 if (isSystemFallback) { | |
254 CFDictionaryRef runAttributes = CTRunGetAttributes(ctRun); | |
255 CTFontRef runFont = static_cast<CTFontRef>(CFDictionaryGetValue(runA
ttributes, kCTFontAttributeName)); | |
256 ASSERT(CFGetTypeID(runFont) == CTFontGetTypeID()); | |
257 if (!CFEqual(runFont, fontData->platformData().ctFont())) { | |
258 // Begin trying to see if runFont matches any of the fonts in th
e fallback list. | |
259 RetainPtr<CGFontRef> runCGFont(AdoptCF, CTFontCopyGraphicsFont(r
unFont, 0)); | |
260 unsigned i = 0; | |
261 for (const FontData* candidateFontData = m_font.fontDataAt(i); c
andidateFontData; candidateFontData = m_font.fontDataAt(++i)) { | |
262 runFontData = candidateFontData->fontDataForCharacter(baseCh
aracter); | |
263 RetainPtr<CGFontRef> cgFont(AdoptCF, CTFontCopyGraphicsFont(
runFontData->platformData().ctFont(), 0)); | |
264 if (CFEqual(cgFont.get(), runCGFont.get())) | |
265 break; | |
266 runFontData = 0; | |
267 } | |
268 // If there is no matching font, look up by name in the font cac
he. | |
269 if (!runFontData) { | |
270 // Rather than using runFont as an NSFont and wrapping it in
a FontPlatformData, go through | |
271 // the font cache and ultimately through NSFontManager in or
der to get an NSFont with the right | |
272 // NSFontRenderingMode. | |
273 RetainPtr<CFStringRef> fontName(AdoptCF, CTFontCopyPostScrip
tName(runFont)); | |
274 if (CFEqual(fontName.get(), CFSTR("LastResort"))) { | |
275 m_complexTextRuns.append(ComplexTextRun::create(m_font.p
rimaryFont(), cp, stringLocation + runRange.location, runRange.length, m_run.ltr
())); | |
276 continue; | |
277 } | |
278 runFontData = FontCache::fontCache()->getFontData(m_font.fon
tDescription(), fontName.get(), false, DoNotRetain).get(); | |
279 // Core Text may have used a font that is not known to NSFon
tManager. In that case, fall back on | |
280 // using the font as returned, even though it may not have t
he best NSFontRenderingMode. | |
281 if (!runFontData) { | |
282 FontPlatformData runFontPlatformData((NSFont *)runFont,
CTFontGetSize(runFont)); | |
283 runFontData = FontCache::fontCache()->fontDataFromFontPl
atformData(&runFontPlatformData, DoNotRetain).get(); | |
284 } | |
285 } | |
286 if (m_fallbackFonts && runFontData != m_font.primaryFont()) | |
287 m_fallbackFonts->add(runFontData); | |
288 } | |
289 } | |
290 if (m_fallbackFonts && runFontData != m_font.primaryFont()) | |
291 m_fallbackFonts->add(fontData); | |
292 | |
293 m_complexTextRuns.append(ComplexTextRun::create(ctRun, runFontData, cp,
stringLocation, length, runRange)); | |
294 } | |
295 } | |
296 | |
297 } // namespace blink | |
OLD | NEW |