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| 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 | |
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Chromium Code Reviews
Issue 175253002:
Switch to HarfBuzz on Mac and remove CoreText shaper (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master