const SimpleFontData* FontCache::getFontDataForCharacters(const Font& font, const UChar* characters, int length)
{
#if defined(USE_FREETYPE)
FcResult fresult;
FontPlatformData* prim = const_cast<FontPlatformData*>(&font.primaryFont()->platformData());
if (!prim->m_fallbacks)
prim->m_fallbacks = FcFontSort(NULL, prim->m_pattern, FcTrue, NULL, &fresult);
FcFontSet* fs = prim->m_fallbacks;
for (int i = 0; i < fs->nfont; i++) {
FcPattern* fin = FcFontRenderPrepare(NULL, prim->m_pattern, fs->fonts[i]);
cairo_font_face_t* fontFace = cairo_ft_font_face_create_for_pattern(fin);
FontPlatformData alternateFont(fontFace, font.fontDescription().computedPixelSize(), false, false);
cairo_font_face_destroy(fontFace);
alternateFont.m_pattern = fin;
SimpleFontData* sfd = getCachedFontData(&alternateFont);
if (sfd->containsCharacters(characters, length))
return sfd;
}
#endif
return 0;
}
void RemoteFontFaceSource::pruneTable() {
if (m_fontDataTable.isEmpty())
return;
for (const auto& item : m_fontDataTable) {
SimpleFontData* fontData = item.value.get();
if (fontData && fontData->customFontData())
fontData->customFontData()->clearFontFaceSource();
}
m_fontDataTable.clear();
}
const SimpleFontData* Font::fontDataForCombiningCharacterSequence(const UChar* characters, size_t length, FontDataVariant variant) const
{
UChar32 baseCharacter;
size_t baseCharacterLength = 0;
U16_NEXT(characters, baseCharacterLength, length, baseCharacter);
GlyphData baseCharacterGlyphData = glyphDataForCharacter(baseCharacter, false, variant);
if (!baseCharacterGlyphData.glyph)
return 0;
if (length == baseCharacterLength)
return baseCharacterGlyphData.fontData;
bool triedBaseCharacterFontData = false;
unsigned i = 0;
for (const FontData* fontData = fontDataAt(0); fontData; fontData = fontDataAt(++i)) {
const SimpleFontData* simpleFontData = fontData->fontDataForCharacter(baseCharacter);
if (variant == NormalVariant) {
if (simpleFontData->platformData().orientation() == Vertical) {
if (isCJKIdeographOrSymbol(baseCharacter) && !simpleFontData->hasVerticalGlyphs()) {
variant = BrokenIdeographVariant;
simpleFontData = simpleFontData->brokenIdeographFontData().get();
} else if (m_fontDescription.nonCJKGlyphOrientation() == NonCJKGlyphOrientationVerticalRight) {
SimpleFontData* verticalRightFontData = simpleFontData->verticalRightOrientationFontData().get();
Glyph verticalRightGlyph = verticalRightFontData->glyphForCharacter(baseCharacter);
if (verticalRightGlyph == baseCharacterGlyphData.glyph)
simpleFontData = verticalRightFontData;
} else {
SimpleFontData* uprightFontData = simpleFontData->uprightOrientationFontData().get();
Glyph uprightGlyph = uprightFontData->glyphForCharacter(baseCharacter);
if (uprightGlyph != baseCharacterGlyphData.glyph)
simpleFontData = uprightFontData;
}
}
} else {
if (const SimpleFontData* variantFontData = simpleFontData->variantFontData(m_fontDescription, variant).get())
simpleFontData = variantFontData;
}
if (simpleFontData == baseCharacterGlyphData.fontData)
triedBaseCharacterFontData = true;
if (simpleFontData->canRenderCombiningCharacterSequence(characters, length))
return simpleFontData;
}
if (!triedBaseCharacterFontData && baseCharacterGlyphData.fontData && baseCharacterGlyphData.fontData->canRenderCombiningCharacterSequence(characters, length))
return baseCharacterGlyphData.fontData;
return SimpleFontData::systemFallback();
}
void RemoteFontFaceSource::pruneTable()
{
if (m_fontDataTable.isEmpty())
return;
for (FontDataTable::iterator it = m_fontDataTable.begin(); it != m_fontDataTable.end(); ++it) {
SimpleFontData* fontData = it->value.get();
if (fontData && fontData->customFontData())
fontData->customFontData()->clearFontFaceSource();
}
m_fontDataTable.clear();
}
PassRefPtr<SimpleFontData> RemoteFontFaceSource::createLoadingFallbackFontData(const FontDescription& fontDescription)
{
// This temporary font is not retained and should not be returned.
FontCachePurgePreventer fontCachePurgePreventer;
SimpleFontData* temporaryFont = FontCache::fontCache()->getNonRetainedLastResortFallbackFont(fontDescription);
if (!temporaryFont) {
ASSERT_NOT_REACHED();
return nullptr;
}
RefPtr<CSSCustomFontData> cssFontData = CSSCustomFontData::create(this, m_font->exceedsFontLoadWaitLimit() ? CSSCustomFontData::VisibleFallback : CSSCustomFontData::InvisibleFallback);
return SimpleFontData::create(temporaryFont->platformData(), cssFontData);
}
const SimpleFontData* FontCache::getFontDataForCharacters(const Font& font, const UChar* characters, int length)
{
SimpleFontData* fontData = 0;
fontData = getCachedFontData(font.fontDescription(), font.family().family());
if (!fontData->containsCharacters(characters, length))
fontData = getSimilarFontPlatformData(font);
if (!fontData->containsCharacters(characters, length))
fontData = getLastResortFallbackFont(font.fontDescription());
ASSERT(fontData);
return fontData;
}
float SimpleShaper::adjustSpacing(float width, const CharacterData& charData,
const SimpleFontData& fontData, GlyphBuffer* glyphBuffer)
{
// Account for letter-spacing.
if (width)
width += m_font->fontDescription().letterSpacing();
bool treatAsSpace = Character::treatAsSpace(charData.character);
if (treatAsSpace) {
// Distribute the run's total expansion evenly over all expansion opportunities in the run.
if (m_expansion) {
if (!treatAsSpace && !m_isAfterExpansion) {
// Take the expansion opportunity before this ideograph.
m_expansion -= m_expansionPerOpportunity;
float expansionAtThisOpportunity = m_expansionPerOpportunity;
m_runWidthSoFar += expansionAtThisOpportunity;
if (glyphBuffer) {
if (glyphBuffer->isEmpty()) {
if (m_forTextEmphasis)
glyphBuffer->add(fontData.zeroWidthSpaceGlyph(), &fontData, m_expansionPerOpportunity);
else
glyphBuffer->add(fontData.spaceGlyph(), &fontData, expansionAtThisOpportunity);
} else {
glyphBuffer->expandLastAdvance(expansionAtThisOpportunity);
}
}
}
if (m_run.allowsTrailingExpansion()
|| (m_run.ltr() && charData.characterOffset + charData.clusterLength < static_cast<size_t>(m_run.length()))
|| (m_run.rtl() && charData.characterOffset)) {
m_expansion -= m_expansionPerOpportunity;
width += m_expansionPerOpportunity;
m_isAfterExpansion = true;
}
} else {
m_isAfterExpansion = false;
}
// Account for word spacing.
// We apply additional space between "words" by adding width to the space character.
if (treatAsSpace && (charData.character != '\t' || !m_run.allowTabs())
&& (charData.characterOffset || charData.character == noBreakSpace)
&& m_font->fontDescription().wordSpacing()) {
width += m_font->fontDescription().wordSpacing();
}
} else {
m_isAfterExpansion = false;
}
return width;
}
static bool canUseForText(const CharacterType* text, unsigned length, const SimpleFontData& fontData)
{
// FIXME: <textarea maxlength=0> generates empty text node.
if (!length)
return false;
for (unsigned i = 0; i < length; ++i) {
UChar character = text[i];
if (character == ' ')
continue;
// These would be easy to support.
if (character == noBreakSpace)
return false;
if (character == softHyphen)
return false;
UCharDirection direction = u_charDirection(character);
if (direction == U_RIGHT_TO_LEFT || direction == U_RIGHT_TO_LEFT_ARABIC
|| direction == U_RIGHT_TO_LEFT_EMBEDDING || direction == U_RIGHT_TO_LEFT_OVERRIDE
|| direction == U_LEFT_TO_RIGHT_EMBEDDING || direction == U_LEFT_TO_RIGHT_OVERRIDE
|| direction == U_POP_DIRECTIONAL_FORMAT || direction == U_BOUNDARY_NEUTRAL)
return false;
if (!fontData.glyphForCharacter(character))
return false;
}
return true;
}
const SimpleFontData* FontCache::getFontDataForCharacters(const Font& font, const UChar* characters, int length)
{
FcResult fresult;
// Avoid copying FontPlatformData.
FontPlatformData* prim = const_cast<FontPlatformData*>(&font.primaryFont()->m_font);
if (!prim->m_fallbacks)
prim->m_fallbacks = FcFontSort(NULL, prim->m_pattern, FcTrue, NULL, &fresult);
FcFontSet* fs = prim->m_fallbacks;
FT_Library library = FontPlatformData::m_library;
FcChar8* fc_filename;
char* filename;
int id;
FT_Face face;
for (int i = 0; i < fs->nfont; i++) {
FcPattern* fin = FcFontRenderPrepare(0, prim->m_pattern, fs->fonts[i]);
if (FcPatternGetString(fin, FC_FILE, 0, &fc_filename) != FcResultMatch)
continue;
filename = (char *) fc_filename; // Use C cast as FcChar is a fontconfig type.
if (FcPatternGetInteger(fin, FC_INDEX, 0, &id) != FcResultMatch)
continue;
if (FT_Error error = FT_New_Face(library, filename, id, &face))
continue;
// FIXME: is it really necessary ?
FT_Set_Pixel_Sizes(face, 0, static_cast<uint> (font.fontDescription().computedSize()));
FontPlatformData alternateFont(face, font.fontDescription().computedPixelSize(), false, false);
// FIXME: FT_Done_Face(face); we should clean the face correctly the FT_Face but we can't do that here...
alternateFont.m_pattern = fin;
SimpleFontData* sfd = getCachedFontData(&alternateFont);
if (sfd->containsCharacters(characters, length))
return sfd;
}
return 0;
}
std::unique_ptr<GlyphToPathTranslator> SVGTextRunRenderingContext::createGlyphToPathTranslator(const SimpleFontData& fontData, const GlyphBuffer& glyphBuffer, int from, int numGlyphs, const FloatPoint& point) const
{
SVGFontElement* fontElement = 0;
SVGFontFaceElement* fontFaceElement = 0;
const SVGFontData* svgFontData = svgFontAndFontFaceElementForFontData(&fontData, fontFaceElement, fontElement);
if (!fontElement || !fontFaceElement)
return std::make_unique<DummyGlyphToPathTranslator>();
auto& elementRenderer = renderer().isRenderElement() ? toRenderElement(renderer()) : *renderer().parent();
RenderStyle& style = elementRenderer.style();
bool isVerticalText = style.svgStyle().isVerticalWritingMode();
float scale = scaleEmToUnits(fontData.platformData().size(), fontFaceElement->unitsPerEm());
return std::make_unique<SVGGlyphToPathTranslator>(glyphBuffer, point, *svgFontData, *fontElement, from, numGlyphs, scale, isVerticalText);
}
SimpleFontData* CSSFontFaceSource::getFontData(const FontDescription& fontDescription, bool syntheticBold, bool syntheticItalic, CSSFontSelector* fontSelector)
{
// If the font hasn't loaded or an error occurred, then we've got nothing.
if (!isValid())
return 0;
#if ENABLE(SVG_FONTS)
if (!m_font && !m_svgFontFaceElement) {
#else
if (!m_font) {
#endif
SimpleFontData* fontData = fontCache()->getCachedFontData(fontDescription, m_string);
// We're local. Just return a SimpleFontData from the normal cache.
return fontData;
}
// See if we have a mapping in our FontData cache.
unsigned hashKey = (fontDescription.computedPixelSize() + 1) << 6 | fontDescription.widthVariant() << 4
| (fontDescription.textOrientation() == TextOrientationUpright ? 8 : 0) | (fontDescription.orientation() == Vertical ? 4 : 0) | (syntheticBold ? 2 : 0) | (syntheticItalic ? 1 : 0);
if (SimpleFontData* cachedData = m_fontDataTable.get(hashKey))
return cachedData;
OwnPtr<SimpleFontData> fontData;
// If we are still loading, then we let the system pick a font.
if (isLoaded()) {
if (m_font) {
#if ENABLE(SVG_FONTS)
if (m_hasExternalSVGFont) {
// For SVG fonts parse the external SVG document, and extract the <font> element.
if (!m_font->ensureSVGFontData())
return 0;
if (!m_externalSVGFontElement)
m_externalSVGFontElement = m_font->getSVGFontById(SVGURIReference::getTarget(m_string));
if (!m_externalSVGFontElement)
return 0;
SVGFontFaceElement* fontFaceElement = 0;
// Select first <font-face> child
for (Node* fontChild = m_externalSVGFontElement->firstChild(); fontChild; fontChild = fontChild->nextSibling()) {
if (fontChild->hasTagName(SVGNames::font_faceTag)) {
fontFaceElement = static_cast<SVGFontFaceElement*>(fontChild);
break;
}
}
if (fontFaceElement) {
if (!m_svgFontFaceElement) {
// We're created using a CSS @font-face rule, that means we're not associated with a SVGFontFaceElement.
// Use the imported <font-face> tag as referencing font-face element for these cases.
m_svgFontFaceElement = fontFaceElement;
}
fontData.set(new SimpleFontData(adoptPtr(new SVGFontData(fontFaceElement)), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic));
}
} else
#endif
{
// Create new FontPlatformData from our CGFontRef, point size and ATSFontRef.
if (!m_font->ensureCustomFontData())
return 0;
fontData.set(new SimpleFontData(m_font->platformDataFromCustomData(fontDescription.computedPixelSize(), syntheticBold, syntheticItalic, fontDescription.orientation(),
fontDescription.textOrientation(), fontDescription.widthVariant(), fontDescription.renderingMode()), true, false));
}
} else {
#if ENABLE(SVG_FONTS)
// In-Document SVG Fonts
if (m_svgFontFaceElement)
fontData.set(new SimpleFontData(adoptPtr(new SVGFontData(m_svgFontFaceElement.get())), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic));
#endif
}
} else {
// Kick off the load now.
if (CachedResourceLoader* cachedResourceLoader = fontSelector->cachedResourceLoader())
m_font->beginLoadIfNeeded(cachedResourceLoader);
// FIXME: m_string is a URL so it makes no sense to pass it as a family name.
SimpleFontData* tempData = fontCache()->getCachedFontData(fontDescription, m_string);
if (!tempData)
tempData = fontCache()->getLastResortFallbackFont(fontDescription);
fontData.set(new SimpleFontData(tempData->platformData(), true, true));
}
SimpleFontData* fontDataRawPtr = fontData.leakPtr();
m_fontDataTable.set(hashKey, fontDataRawPtr);
return fontDataRawPtr;
}
#if ENABLE(SVG_FONTS)
SVGFontFaceElement* CSSFontFaceSource::svgFontFaceElement() const
{
return m_svgFontFaceElement.get();
}
void CSSFontFaceSource::setSVGFontFaceElement(PassRefPtr<SVGFontFaceElement> element)
{
m_svgFontFaceElement = element;
}
bool CSSFontFaceSource::isSVGFontFaceSource() const
{
return m_svgFontFaceElement || m_hasExternalSVGFont;
}
#endif
}
SimpleFontData* CSSFontFaceSource::getFontData(const FontDescription& fontDescription, bool syntheticBold, bool syntheticItalic, CSSFontSelector* fontSelector)
{
// If the font hasn't loaded or an error occurred, then we've got nothing.
if (!isValid())
return 0;
#if ENABLE(SVG_FONTS)
if (!m_font && !m_svgFontFaceElement) {
#else
if (!m_font) {
#endif
// We're local. Just return a SimpleFontData from the normal cache.
return fontCache()->getCachedFontData(fontDescription, m_string);
}
// See if we have a mapping in our FontData cache.
unsigned hashKey = (fontDescription.computedPixelSize() + 1) << 6 | fontDescription.widthVariant() << 4
| (fontDescription.textOrientation() == TextOrientationUpright ? 8 : 0) | (fontDescription.orientation() == Vertical ? 4 : 0) | (syntheticBold ? 2 : 0) | (syntheticItalic ? 1 : 0);
if (SimpleFontData* cachedData = m_fontDataTable.get(hashKey))
return cachedData;
OwnPtr<SimpleFontData> fontData;
// If we are still loading, then we let the system pick a font.
if (isLoaded()) {
if (m_font) {
#if ENABLE(SVG_FONTS)
if (m_hasExternalSVGFont) {
// For SVG fonts parse the external SVG document, and extract the <font> element.
if (!m_font->ensureSVGFontData())
return 0;
if (!m_externalSVGFontElement) {
String fragmentIdentifier;
size_t start = m_string.find('#');
if (start != notFound)
fragmentIdentifier = m_string.string().substring(start + 1);
m_externalSVGFontElement = m_font->getSVGFontById(fragmentIdentifier);
}
if (!m_externalSVGFontElement)
return 0;
SVGFontFaceElement* fontFaceElement = 0;
// Select first <font-face> child
for (Node* fontChild = m_externalSVGFontElement->firstChild(); fontChild; fontChild = fontChild->nextSibling()) {
if (fontChild->hasTagName(SVGNames::font_faceTag)) {
fontFaceElement = static_cast<SVGFontFaceElement*>(fontChild);
break;
}
}
if (fontFaceElement) {
if (!m_svgFontFaceElement) {
// We're created using a CSS @font-face rule, that means we're not associated with a SVGFontFaceElement.
// Use the imported <font-face> tag as referencing font-face element for these cases.
m_svgFontFaceElement = fontFaceElement;
}
fontData = adoptPtr(new SimpleFontData(SVGFontData::create(fontFaceElement), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic));
}
} else
#endif
{
// Create new FontPlatformData from our CGFontRef, point size and ATSFontRef.
if (!m_font->ensureCustomFontData())
return 0;
fontData = adoptPtr(new SimpleFontData(m_font->platformDataFromCustomData(fontDescription.computedPixelSize(), syntheticBold, syntheticItalic, fontDescription.orientation(),
fontDescription.textOrientation(), fontDescription.widthVariant(), fontDescription.renderingMode()), true, false));
}
} else {
#if ENABLE(SVG_FONTS)
// In-Document SVG Fonts
if (m_svgFontFaceElement)
fontData = adoptPtr(new SimpleFontData(SVGFontData::create(m_svgFontFaceElement.get()), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic));
#endif
}
} else {
// Kick off the load now. Do it on a zero-delay timer rather than synchronously, because we may be in
// the middle of layout, and the loader may invoke arbitrary delegate or event handler code.
m_fontSelector = fontSelector;
if (!m_loadStartTimer.isActive())
m_loadStartTimer.startOneShot(0);
// This temporary font is not retained and should not be returned.
FontCachePurgePreventer fontCachePurgePreventer;
SimpleFontData* temporaryFont = fontCache()->getNonRetainedLastResortFallbackFont(fontDescription);
fontData = adoptPtr(new SimpleFontData(temporaryFont->platformData(), true, true));
}
SimpleFontData* fontDataRawPtr = fontData.leakPtr();
m_fontDataTable.set(hashKey, fontDataRawPtr);
return fontDataRawPtr;
}
void CSSFontFaceSource::startLoadingTimerFired(Timer<WebCore::CSSFontFaceSource>*)
{
ASSERT(m_font);
ASSERT(m_fontSelector);
if (CachedResourceLoader* cachedResourceLoader = m_fontSelector->cachedResourceLoader())
m_font->beginLoadIfNeeded(cachedResourceLoader);
m_fontSelector = nullptr;
}
PassRefPtr<SimpleFontData> CSSFontFaceSource::getFontData(const FontDescription& fontDescription, bool syntheticBold, bool syntheticItalic, CSSFontSelector* fontSelector)
{
// If the font hasn't loaded or an error occurred, then we've got nothing.
if (!isValid())
return 0;
if (!m_font
#if ENABLE(SVG_FONTS)
&& !m_svgFontFaceElement
#endif
) {
// We're local. Just return a SimpleFontData from the normal cache.
// We don't want to check alternate font family names here, so pass true as the checkingAlternateName parameter.
return fontCache()->getCachedFontData(fontDescription, m_string, true);
}
// See if we have a mapping in our FontData cache.
unsigned hashKey = (fontDescription.computedPixelSize() + 1) << 5 | fontDescription.widthVariant() << 3
| (fontDescription.orientation() == Vertical ? 4 : 0) | (syntheticBold ? 2 : 0) | (syntheticItalic ? 1 : 0);
RefPtr<SimpleFontData>& fontData = m_fontDataTable.add(hashKey, 0).iterator->value;
if (fontData)
return fontData; // No release, because fontData is a reference to a RefPtr that is held in the m_fontDataTable.
// If we are still loading, then we let the system pick a font.
if (isLoaded()) {
if (m_font) {
#if ENABLE(SVG_FONTS)
if (m_hasExternalSVGFont) {
// For SVG fonts parse the external SVG document, and extract the <font> element.
if (!m_font->ensureSVGFontData())
return 0;
if (!m_externalSVGFontElement) {
String fragmentIdentifier;
size_t start = m_string.find('#');
if (start != notFound)
fragmentIdentifier = m_string.string().substring(start + 1);
m_externalSVGFontElement = m_font->getSVGFontById(fragmentIdentifier);
}
if (!m_externalSVGFontElement)
return 0;
if (auto fontFaceElement = Traversal<SVGFontFaceElement>::firstChild(m_externalSVGFontElement.get())) {
if (!m_svgFontFaceElement) {
// We're created using a CSS @font-face rule, that means we're not associated with a SVGFontFaceElement.
// Use the imported <font-face> tag as referencing font-face element for these cases.
m_svgFontFaceElement = fontFaceElement;
}
fontData = SimpleFontData::create(SVGFontData::create(fontFaceElement), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic);
}
} else
#endif
{
// Create new FontPlatformData from our CGFontRef, point size and ATSFontRef.
if (!m_font->ensureCustomFontData())
return 0;
fontData = SimpleFontData::create(m_font->platformDataFromCustomData(fontDescription.computedPixelSize(), syntheticBold, syntheticItalic,
fontDescription.orientation(), fontDescription.widthVariant(), fontDescription.renderingMode()), true, false);
}
} else {
#if ENABLE(SVG_FONTS)
// In-Document SVG Fonts
if (m_svgFontFaceElement)
fontData = SimpleFontData::create(SVGFontData::create(m_svgFontFaceElement.get()), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic);
#endif
}
} else {
// Kick off the load. Do it soon rather than now, because we may be in the middle of layout,
// and the loader may invoke arbitrary delegate or event handler code.
fontSelector->beginLoadingFontSoon(m_font.get());
// This temporary font is not retained and should not be returned.
FontCachePurgePreventer fontCachePurgePreventer;
SimpleFontData* temporaryFont = fontCache()->getNonRetainedLastResortFallbackFont(fontDescription);
fontData = SimpleFontData::create(temporaryFont->platformData(), true, true);
}
return fontData; // No release, because fontData is a reference to a RefPtr that is held in the m_fontDataTable.
}
PassRefPtr<SimpleFontData> CSSFontFaceSource::getFontData(const FontDescription& fontDescription)
{
// If the font hasn't loaded or an error occurred, then we've got nothing.
if (!isValid())
return 0;
if (isLocal()) {
// We're local. Just return a SimpleFontData from the normal cache.
// We don't want to check alternate font family names here, so pass true as the checkingAlternateName parameter.
RefPtr<SimpleFontData> fontData = FontCache::fontCache()->getFontData(fontDescription, m_string, true);
m_histograms.recordLocalFont(fontData);
return fontData;
}
// See if we have a mapping in our FontData cache.
AtomicString emptyFontFamily = "";
FontCacheKey key = fontDescription.cacheKey(emptyFontFamily);
RefPtr<SimpleFontData>& fontData = m_fontDataTable.add(key.hash(), 0).iterator->value;
if (fontData)
return fontData; // No release, because fontData is a reference to a RefPtr that is held in the m_fontDataTable.
// If we are still loading, then we let the system pick a font.
if (isLoaded()) {
if (m_font) {
#if ENABLE(SVG_FONTS)
if (m_hasExternalSVGFont) {
// For SVG fonts parse the external SVG document, and extract the <font> element.
if (!m_font->ensureSVGFontData())
return 0;
if (!m_externalSVGFontElement) {
String fragmentIdentifier;
size_t start = m_string.find('#');
if (start != kNotFound)
fragmentIdentifier = m_string.string().substring(start + 1);
m_externalSVGFontElement = m_font->getSVGFontById(fragmentIdentifier);
}
if (!m_externalSVGFontElement)
return 0;
SVGFontFaceElement* fontFaceElement = 0;
// Select first <font-face> child
for (Node* fontChild = m_externalSVGFontElement->firstChild(); fontChild; fontChild = fontChild->nextSibling()) {
if (fontChild->hasTagName(SVGNames::font_faceTag)) {
fontFaceElement = toSVGFontFaceElement(fontChild);
break;
}
}
if (fontFaceElement) {
if (!m_svgFontFaceElement) {
// We're created using a CSS @font-face rule, that means we're not associated with a SVGFontFaceElement.
// Use the imported <font-face> tag as referencing font-face element for these cases.
m_svgFontFaceElement = fontFaceElement;
}
fontData = SimpleFontData::create(
SVGFontData::create(fontFaceElement),
fontDescription.effectiveFontSize(),
fontDescription.isSyntheticBold(),
fontDescription.isSyntheticItalic());
}
} else
#endif
{
// Create new FontPlatformData from our CGFontRef, point size and ATSFontRef.
if (!m_font->ensureCustomFontData())
return 0;
fontData = SimpleFontData::create(
m_font->platformDataFromCustomData(fontDescription.effectiveFontSize(),
fontDescription.isSyntheticBold(), fontDescription.isSyntheticItalic(),
fontDescription.orientation(), fontDescription.widthVariant()), CustomFontData::create(false));
}
} else {
#if ENABLE(SVG_FONTS)
// In-Document SVG Fonts
if (m_svgFontFaceElement) {
fontData = SimpleFontData::create(
SVGFontData::create(m_svgFontFaceElement.get()),
fontDescription.effectiveFontSize(),
fontDescription.isSyntheticBold(),
fontDescription.isSyntheticItalic());
}
#endif
}
} else {
// This temporary font is not retained and should not be returned.
FontCachePurgePreventer fontCachePurgePreventer;
SimpleFontData* temporaryFont = FontCache::fontCache()->getNonRetainedLastResortFallbackFont(fontDescription);
if (!temporaryFont) {
ASSERT_NOT_REACHED();
return 0;
}
RefPtr<CSSCustomFontData> cssFontData = CSSCustomFontData::create(true);
cssFontData->setCSSFontFaceSource(this);
fontData = SimpleFontData::create(temporaryFont->platformData(), cssFontData);
}
return fontData; // No release, because fontData is a reference to a RefPtr that is held in the m_fontDataTable.
}
