| /* |
| * Copyright (C) 2007, 2008, 2011 Apple Inc. All rights reserved. |
| * (C) 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org> |
| * |
| * 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 COMPUTER, INC. OR |
| * 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. |
| */ |
| |
| #include "config.h" |
| #include "CSSFontSelector.h" |
| |
| #include "CachedFont.h" |
| #include "CSSFontFace.h" |
| #include "CSSFontFaceSource.h" |
| #include "CSSFontFaceSrcValue.h" |
| #include "CSSPrimitiveValue.h" |
| #include "CSSPropertyNames.h" |
| #include "CSSSegmentedFontFace.h" |
| #include "CSSUnicodeRangeValue.h" |
| #include "CSSValueKeywords.h" |
| #include "CSSValueList.h" |
| #include "CachedResourceLoader.h" |
| #include "Document.h" |
| #include "FontCache.h" |
| #include "Frame.h" |
| #include "RenderObject.h" |
| #include "Settings.h" |
| #include "SimpleFontData.h" |
| #include "StylePropertySet.h" |
| #include "StyleResolver.h" |
| #include "StyleRule.h" |
| #include "WebKitFontFamilyNames.h" |
| #include <wtf/text/AtomicString.h> |
| |
| #if ENABLE(SVG) |
| #include "SVGFontFaceElement.h" |
| #include "SVGNames.h" |
| #endif |
| |
| using namespace std; |
| |
| namespace WebCore { |
| |
| CSSFontSelector::CSSFontSelector(Document* document) |
| : m_document(document) |
| , m_beginLoadingTimer(this, &CSSFontSelector::beginLoadTimerFired) |
| , m_version(0) |
| { |
| // FIXME: An old comment used to say there was no need to hold a reference to m_document |
| // because "we are guaranteed to be destroyed before the document". But there does not |
| // seem to be any such guarantee. |
| |
| ASSERT(m_document); |
| fontCache()->addClient(this); |
| } |
| |
| CSSFontSelector::~CSSFontSelector() |
| { |
| clearDocument(); |
| fontCache()->removeClient(this); |
| } |
| |
| bool CSSFontSelector::isEmpty() const |
| { |
| return m_fonts.isEmpty(); |
| } |
| |
| void CSSFontSelector::addFontFaceRule(const StyleRuleFontFace* fontFaceRule) |
| { |
| // Obtain the font-family property and the src property. Both must be defined. |
| const StylePropertySet* style = fontFaceRule->properties(); |
| RefPtr<CSSValue> fontFamily = style->getPropertyCSSValue(CSSPropertyFontFamily); |
| RefPtr<CSSValue> src = style->getPropertyCSSValue(CSSPropertySrc); |
| RefPtr<CSSValue> unicodeRange = style->getPropertyCSSValue(CSSPropertyUnicodeRange); |
| if (!fontFamily || !src || !fontFamily->isValueList() || !src->isValueList() || (unicodeRange && !unicodeRange->isValueList())) |
| return; |
| |
| CSSValueList* familyList = static_cast<CSSValueList*>(fontFamily.get()); |
| if (!familyList->length()) |
| return; |
| |
| CSSValueList* srcList = static_cast<CSSValueList*>(src.get()); |
| if (!srcList->length()) |
| return; |
| |
| CSSValueList* rangeList = static_cast<CSSValueList*>(unicodeRange.get()); |
| |
| unsigned traitsMask = 0; |
| |
| if (RefPtr<CSSValue> fontStyle = style->getPropertyCSSValue(CSSPropertyFontStyle)) { |
| if (!fontStyle->isPrimitiveValue()) |
| return; |
| |
| switch (static_cast<CSSPrimitiveValue*>(fontStyle.get())->getIdent()) { |
| case CSSValueNormal: |
| traitsMask |= FontStyleNormalMask; |
| break; |
| case CSSValueItalic: |
| case CSSValueOblique: |
| traitsMask |= FontStyleItalicMask; |
| break; |
| default: |
| break; |
| } |
| } else |
| traitsMask |= FontStyleNormalMask; |
| |
| if (RefPtr<CSSValue> fontWeight = style->getPropertyCSSValue(CSSPropertyFontWeight)) { |
| if (!fontWeight->isPrimitiveValue()) |
| return; |
| |
| switch (static_cast<CSSPrimitiveValue*>(fontWeight.get())->getIdent()) { |
| case CSSValueBold: |
| case CSSValue700: |
| traitsMask |= FontWeight700Mask; |
| break; |
| case CSSValueNormal: |
| case CSSValue400: |
| traitsMask |= FontWeight400Mask; |
| break; |
| case CSSValue900: |
| traitsMask |= FontWeight900Mask; |
| break; |
| case CSSValue800: |
| traitsMask |= FontWeight800Mask; |
| break; |
| case CSSValue600: |
| traitsMask |= FontWeight600Mask; |
| break; |
| case CSSValue500: |
| traitsMask |= FontWeight500Mask; |
| break; |
| case CSSValue300: |
| traitsMask |= FontWeight300Mask; |
| break; |
| case CSSValue200: |
| traitsMask |= FontWeight200Mask; |
| break; |
| case CSSValue100: |
| traitsMask |= FontWeight100Mask; |
| break; |
| default: |
| break; |
| } |
| } else |
| traitsMask |= FontWeight400Mask; |
| |
| if (RefPtr<CSSValue> fontVariant = style->getPropertyCSSValue(CSSPropertyFontVariant)) { |
| // font-variant descriptor can be a value list. |
| if (fontVariant->isPrimitiveValue()) { |
| RefPtr<CSSValueList> list = CSSValueList::createCommaSeparated(); |
| list->append(fontVariant); |
| fontVariant = list; |
| } else if (!fontVariant->isValueList()) |
| return; |
| |
| CSSValueList* variantList = static_cast<CSSValueList*>(fontVariant.get()); |
| unsigned numVariants = variantList->length(); |
| if (!numVariants) |
| return; |
| |
| for (unsigned i = 0; i < numVariants; ++i) { |
| switch (static_cast<CSSPrimitiveValue*>(variantList->itemWithoutBoundsCheck(i))->getIdent()) { |
| case CSSValueNormal: |
| traitsMask |= FontVariantNormalMask; |
| break; |
| case CSSValueSmallCaps: |
| traitsMask |= FontVariantSmallCapsMask; |
| break; |
| default: |
| break; |
| } |
| } |
| } else |
| traitsMask |= FontVariantMask; |
| |
| // Each item in the src property's list is a single CSSFontFaceSource. Put them all into a CSSFontFace. |
| RefPtr<CSSFontFace> fontFace; |
| |
| int srcLength = srcList->length(); |
| |
| bool foundSVGFont = false; |
| |
| for (int i = 0; i < srcLength; i++) { |
| // An item in the list either specifies a string (local font name) or a URL (remote font to download). |
| CSSFontFaceSrcValue* item = static_cast<CSSFontFaceSrcValue*>(srcList->itemWithoutBoundsCheck(i)); |
| OwnPtr<CSSFontFaceSource> source; |
| |
| #if ENABLE(SVG_FONTS) |
| foundSVGFont = item->isSVGFontFaceSrc() || item->svgFontFaceElement(); |
| #endif |
| if (!item->isLocal()) { |
| Settings* settings = m_document ? m_document->frame() ? m_document->frame()->settings() : 0 : 0; |
| bool allowDownloading = foundSVGFont || (settings && settings->downloadableBinaryFontsEnabled()); |
| if (allowDownloading && item->isSupportedFormat() && m_document) { |
| CachedFont* cachedFont = item->cachedFont(m_document); |
| if (cachedFont) { |
| source = adoptPtr(new CSSFontFaceSource(item->resource(), cachedFont)); |
| #if ENABLE(SVG_FONTS) |
| if (foundSVGFont) |
| source->setHasExternalSVGFont(true); |
| #endif |
| } |
| } |
| } else { |
| source = adoptPtr(new CSSFontFaceSource(item->resource())); |
| } |
| |
| if (!fontFace) |
| fontFace = CSSFontFace::create(static_cast<FontTraitsMask>(traitsMask)); |
| |
| if (source) { |
| #if ENABLE(SVG_FONTS) |
| source->setSVGFontFaceElement(item->svgFontFaceElement()); |
| #endif |
| fontFace->addSource(source.release()); |
| } |
| } |
| |
| ASSERT(fontFace); |
| |
| if (fontFace && !fontFace->isValid()) |
| return; |
| |
| if (rangeList) { |
| unsigned numRanges = rangeList->length(); |
| for (unsigned i = 0; i < numRanges; i++) { |
| CSSUnicodeRangeValue* range = static_cast<CSSUnicodeRangeValue*>(rangeList->itemWithoutBoundsCheck(i)); |
| fontFace->addRange(range->from(), range->to()); |
| } |
| } |
| |
| // Hash under every single family name. |
| int familyLength = familyList->length(); |
| for (int i = 0; i < familyLength; i++) { |
| CSSPrimitiveValue* item = static_cast<CSSPrimitiveValue*>(familyList->itemWithoutBoundsCheck(i)); |
| String familyName; |
| if (item->isString()) |
| familyName = item->getStringValue(); |
| else if (item->isIdent()) { |
| // We need to use the raw text for all the generic family types, since @font-face is a way of actually |
| // defining what font to use for those types. |
| switch (item->getIdent()) { |
| case CSSValueSerif: |
| familyName = serifFamily; |
| break; |
| case CSSValueSansSerif: |
| familyName = sansSerifFamily; |
| break; |
| case CSSValueCursive: |
| familyName = cursiveFamily; |
| break; |
| case CSSValueFantasy: |
| familyName = fantasyFamily; |
| break; |
| case CSSValueMonospace: |
| familyName = monospaceFamily; |
| break; |
| case CSSValueWebkitPictograph: |
| familyName = pictographFamily; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| if (familyName.isEmpty()) |
| continue; |
| |
| OwnPtr<Vector<RefPtr<CSSFontFace> > >& familyFontFaces = m_fontFaces.add(familyName, nullptr).iterator->second; |
| if (!familyFontFaces) { |
| familyFontFaces = adoptPtr(new Vector<RefPtr<CSSFontFace> >); |
| |
| ASSERT(!m_locallyInstalledFontFaces.contains(familyName)); |
| |
| Vector<unsigned> locallyInstalledFontsTraitsMasks; |
| fontCache()->getTraitsInFamily(familyName, locallyInstalledFontsTraitsMasks); |
| if (unsigned numLocallyInstalledFaces = locallyInstalledFontsTraitsMasks.size()) { |
| OwnPtr<Vector<RefPtr<CSSFontFace> > > familyLocallyInstalledFaces = adoptPtr(new Vector<RefPtr<CSSFontFace> >); |
| |
| for (unsigned i = 0; i < numLocallyInstalledFaces; ++i) { |
| RefPtr<CSSFontFace> locallyInstalledFontFace = CSSFontFace::create(static_cast<FontTraitsMask>(locallyInstalledFontsTraitsMasks[i]), true); |
| locallyInstalledFontFace->addSource(adoptPtr(new CSSFontFaceSource(familyName))); |
| ASSERT(locallyInstalledFontFace->isValid()); |
| familyLocallyInstalledFaces->append(locallyInstalledFontFace); |
| } |
| |
| m_locallyInstalledFontFaces.set(familyName, familyLocallyInstalledFaces.release()); |
| } |
| } |
| |
| familyFontFaces->append(fontFace); |
| |
| ++m_version; |
| } |
| } |
| |
| void CSSFontSelector::registerForInvalidationCallbacks(FontSelectorClient* client) |
| { |
| m_clients.add(client); |
| } |
| |
| void CSSFontSelector::unregisterForInvalidationCallbacks(FontSelectorClient* client) |
| { |
| m_clients.remove(client); |
| } |
| |
| void CSSFontSelector::dispatchInvalidationCallbacks() |
| { |
| Vector<FontSelectorClient*> clients; |
| copyToVector(m_clients, clients); |
| for (size_t i = 0; i < clients.size(); ++i) |
| clients[i]->fontsNeedUpdate(this); |
| |
| // FIXME: Make Document a FontSelectorClient so that it can simply register for invalidation callbacks. |
| if (!m_document) |
| return; |
| if (StyleResolver* styleResolver = m_document->styleResolverIfExists()) |
| styleResolver->invalidateMatchedPropertiesCache(); |
| if (m_document->inPageCache() || !m_document->renderer()) |
| return; |
| m_document->scheduleForcedStyleRecalc(); |
| } |
| |
| void CSSFontSelector::fontLoaded() |
| { |
| dispatchInvalidationCallbacks(); |
| } |
| |
| void CSSFontSelector::fontCacheInvalidated() |
| { |
| dispatchInvalidationCallbacks(); |
| } |
| |
| static PassRefPtr<FontData> fontDataForGenericFamily(Document* document, const FontDescription& fontDescription, const AtomicString& familyName) |
| { |
| if (!document || !document->frame()) |
| return 0; |
| |
| const Settings* settings = document->frame()->settings(); |
| if (!settings) |
| return 0; |
| |
| AtomicString genericFamily; |
| UScriptCode script = fontDescription.script(); |
| |
| if (familyName == serifFamily) |
| genericFamily = settings->serifFontFamily(script); |
| else if (familyName == sansSerifFamily) |
| genericFamily = settings->sansSerifFontFamily(script); |
| else if (familyName == cursiveFamily) |
| genericFamily = settings->cursiveFontFamily(script); |
| else if (familyName == fantasyFamily) |
| genericFamily = settings->fantasyFontFamily(script); |
| else if (familyName == monospaceFamily) |
| genericFamily = settings->fixedFontFamily(script); |
| else if (familyName == pictographFamily) |
| genericFamily = settings->pictographFontFamily(script); |
| else if (familyName == standardFamily) |
| genericFamily = settings->standardFontFamily(script); |
| |
| if (!genericFamily.isEmpty()) |
| return fontCache()->getCachedFontData(fontDescription, genericFamily); |
| |
| return 0; |
| } |
| |
| static FontTraitsMask desiredTraitsMaskForComparison; |
| |
| static inline bool compareFontFaces(CSSFontFace* first, CSSFontFace* second) |
| { |
| FontTraitsMask firstTraitsMask = first->traitsMask(); |
| FontTraitsMask secondTraitsMask = second->traitsMask(); |
| |
| bool firstHasDesiredVariant = firstTraitsMask & desiredTraitsMaskForComparison & FontVariantMask; |
| bool secondHasDesiredVariant = secondTraitsMask & desiredTraitsMaskForComparison & FontVariantMask; |
| |
| if (firstHasDesiredVariant != secondHasDesiredVariant) |
| return firstHasDesiredVariant; |
| |
| // We need to check font-variant css property for CSS2.1 compatibility. |
| if ((desiredTraitsMaskForComparison & FontVariantSmallCapsMask) && !first->isLocalFallback() && !second->isLocalFallback()) { |
| // Prefer a font that has indicated that it can only support small-caps to a font that claims to support |
| // all variants. The specialized font is more likely to be true small-caps and not require synthesis. |
| bool firstRequiresSmallCaps = (firstTraitsMask & FontVariantSmallCapsMask) && !(firstTraitsMask & FontVariantNormalMask); |
| bool secondRequiresSmallCaps = (secondTraitsMask & FontVariantSmallCapsMask) && !(secondTraitsMask & FontVariantNormalMask); |
| if (firstRequiresSmallCaps != secondRequiresSmallCaps) |
| return firstRequiresSmallCaps; |
| } |
| |
| bool firstHasDesiredStyle = firstTraitsMask & desiredTraitsMaskForComparison & FontStyleMask; |
| bool secondHasDesiredStyle = secondTraitsMask & desiredTraitsMaskForComparison & FontStyleMask; |
| |
| if (firstHasDesiredStyle != secondHasDesiredStyle) |
| return firstHasDesiredStyle; |
| |
| if ((desiredTraitsMaskForComparison & FontStyleItalicMask) && !first->isLocalFallback() && !second->isLocalFallback()) { |
| // Prefer a font that has indicated that it can only support italics to a font that claims to support |
| // all styles. The specialized font is more likely to be the one the author wants used. |
| bool firstRequiresItalics = (firstTraitsMask & FontStyleItalicMask) && !(firstTraitsMask & FontStyleNormalMask); |
| bool secondRequiresItalics = (secondTraitsMask & FontStyleItalicMask) && !(secondTraitsMask & FontStyleNormalMask); |
| if (firstRequiresItalics != secondRequiresItalics) |
| return firstRequiresItalics; |
| } |
| |
| if (secondTraitsMask & desiredTraitsMaskForComparison & FontWeightMask) |
| return false; |
| if (firstTraitsMask & desiredTraitsMaskForComparison & FontWeightMask) |
| return true; |
| |
| // http://www.w3.org/TR/2011/WD-css3-fonts-20111004/#font-matching-algorithm says : |
| // - If the desired weight is less than 400, weights below the desired weight are checked in descending order followed by weights above the desired weight in ascending order until a match is found. |
| // - If the desired weight is greater than 500, weights above the desired weight are checked in ascending order followed by weights below the desired weight in descending order until a match is found. |
| // - If the desired weight is 400, 500 is checked first and then the rule for desired weights less than 400 is used. |
| // - If the desired weight is 500, 400 is checked first and then the rule for desired weights less than 400 is used. |
| |
| static const unsigned fallbackRuleSets = 9; |
| static const unsigned rulesPerSet = 8; |
| static const FontTraitsMask weightFallbackRuleSets[fallbackRuleSets][rulesPerSet] = { |
| { FontWeight200Mask, FontWeight300Mask, FontWeight400Mask, FontWeight500Mask, FontWeight600Mask, FontWeight700Mask, FontWeight800Mask, FontWeight900Mask }, |
| { FontWeight100Mask, FontWeight300Mask, FontWeight400Mask, FontWeight500Mask, FontWeight600Mask, FontWeight700Mask, FontWeight800Mask, FontWeight900Mask }, |
| { FontWeight200Mask, FontWeight100Mask, FontWeight400Mask, FontWeight500Mask, FontWeight600Mask, FontWeight700Mask, FontWeight800Mask, FontWeight900Mask }, |
| { FontWeight500Mask, FontWeight300Mask, FontWeight200Mask, FontWeight100Mask, FontWeight600Mask, FontWeight700Mask, FontWeight800Mask, FontWeight900Mask }, |
| { FontWeight400Mask, FontWeight300Mask, FontWeight200Mask, FontWeight100Mask, FontWeight600Mask, FontWeight700Mask, FontWeight800Mask, FontWeight900Mask }, |
| { FontWeight700Mask, FontWeight800Mask, FontWeight900Mask, FontWeight500Mask, FontWeight400Mask, FontWeight300Mask, FontWeight200Mask, FontWeight100Mask }, |
| { FontWeight800Mask, FontWeight900Mask, FontWeight600Mask, FontWeight500Mask, FontWeight400Mask, FontWeight300Mask, FontWeight200Mask, FontWeight100Mask }, |
| { FontWeight900Mask, FontWeight700Mask, FontWeight600Mask, FontWeight500Mask, FontWeight400Mask, FontWeight300Mask, FontWeight200Mask, FontWeight100Mask }, |
| { FontWeight800Mask, FontWeight700Mask, FontWeight600Mask, FontWeight500Mask, FontWeight400Mask, FontWeight300Mask, FontWeight200Mask, FontWeight100Mask } |
| }; |
| |
| unsigned ruleSetIndex = 0; |
| unsigned w = FontWeight100Bit; |
| while (!(desiredTraitsMaskForComparison & (1 << w))) { |
| w++; |
| ruleSetIndex++; |
| } |
| |
| ASSERT(ruleSetIndex < fallbackRuleSets); |
| const FontTraitsMask* weightFallbackRule = weightFallbackRuleSets[ruleSetIndex]; |
| for (unsigned i = 0; i < rulesPerSet; ++i) { |
| if (secondTraitsMask & weightFallbackRule[i]) |
| return false; |
| if (firstTraitsMask & weightFallbackRule[i]) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| PassRefPtr<FontData> CSSFontSelector::getFontData(const FontDescription& fontDescription, const AtomicString& familyName) |
| { |
| if (m_fontFaces.isEmpty()) { |
| if (familyName.startsWith("-webkit-")) |
| return fontDataForGenericFamily(m_document, fontDescription, familyName); |
| if (fontDescription.genericFamily() == FontDescription::StandardFamily && !fontDescription.isSpecifiedFont()) |
| return fontDataForGenericFamily(m_document, fontDescription, "-webkit-standard"); |
| return 0; |
| } |
| |
| String family = familyName.string(); |
| |
| Vector<RefPtr<CSSFontFace> >* familyFontFaces = m_fontFaces.get(family); |
| // If no face was found, then return 0 and let the OS come up with its best match for the name. |
| if (!familyFontFaces || familyFontFaces->isEmpty()) { |
| // If we were handed a generic family, but there was no match, go ahead and return the correct font based off our |
| // settings. |
| if (fontDescription.genericFamily() == FontDescription::StandardFamily && !fontDescription.isSpecifiedFont()) |
| return fontDataForGenericFamily(m_document, fontDescription, "-webkit-standard"); |
| return fontDataForGenericFamily(m_document, fontDescription, familyName); |
| } |
| |
| OwnPtr<HashMap<unsigned, RefPtr<CSSSegmentedFontFace> > >& segmentedFontFaceCache = m_fonts.add(family, nullptr).iterator->second; |
| if (!segmentedFontFaceCache) |
| segmentedFontFaceCache = adoptPtr(new HashMap<unsigned, RefPtr<CSSSegmentedFontFace> >); |
| |
| FontTraitsMask traitsMask = fontDescription.traitsMask(); |
| |
| RefPtr<CSSSegmentedFontFace>& face = segmentedFontFaceCache->add(traitsMask, 0).iterator->second; |
| if (!face) { |
| face = CSSSegmentedFontFace::create(this); |
| |
| // Collect all matching faces and sort them in order of preference. |
| Vector<CSSFontFace*, 32> candidateFontFaces; |
| for (int i = familyFontFaces->size() - 1; i >= 0; --i) { |
| CSSFontFace* candidate = familyFontFaces->at(i).get(); |
| unsigned candidateTraitsMask = candidate->traitsMask(); |
| if ((traitsMask & FontStyleNormalMask) && !(candidateTraitsMask & FontStyleNormalMask)) |
| continue; |
| if ((traitsMask & FontVariantNormalMask) && !(candidateTraitsMask & FontVariantNormalMask)) |
| continue; |
| #if ENABLE(SVG_FONTS) |
| // For SVG Fonts that specify that they only support the "normal" variant, we will assume they are incapable |
| // of small-caps synthesis and just ignore the font face as a candidate. |
| if (candidate->hasSVGFontFaceSource() && (traitsMask & FontVariantSmallCapsMask) && !(candidateTraitsMask & FontVariantSmallCapsMask)) |
| continue; |
| #endif |
| candidateFontFaces.append(candidate); |
| } |
| |
| if (Vector<RefPtr<CSSFontFace> >* familyLocallyInstalledFontFaces = m_locallyInstalledFontFaces.get(family)) { |
| unsigned numLocallyInstalledFontFaces = familyLocallyInstalledFontFaces->size(); |
| for (unsigned i = 0; i < numLocallyInstalledFontFaces; ++i) { |
| CSSFontFace* candidate = familyLocallyInstalledFontFaces->at(i).get(); |
| unsigned candidateTraitsMask = candidate->traitsMask(); |
| if ((traitsMask & FontStyleNormalMask) && !(candidateTraitsMask & FontStyleNormalMask)) |
| continue; |
| if ((traitsMask & FontVariantNormalMask) && !(candidateTraitsMask & FontVariantNormalMask)) |
| continue; |
| candidateFontFaces.append(candidate); |
| } |
| } |
| |
| desiredTraitsMaskForComparison = traitsMask; |
| stable_sort(candidateFontFaces.begin(), candidateFontFaces.end(), compareFontFaces); |
| unsigned numCandidates = candidateFontFaces.size(); |
| for (unsigned i = 0; i < numCandidates; ++i) |
| face->appendFontFace(candidateFontFaces[i]); |
| } |
| |
| // We have a face. Ask it for a font data. If it cannot produce one, it will fail, and the OS will take over. |
| return face->getFontData(fontDescription); |
| } |
| |
| void CSSFontSelector::clearDocument() |
| { |
| if (!m_document) { |
| ASSERT(!m_beginLoadingTimer.isActive()); |
| ASSERT(m_fontsToBeginLoading.isEmpty()); |
| return; |
| } |
| |
| m_beginLoadingTimer.stop(); |
| |
| CachedResourceLoader* cachedResourceLoader = m_document->cachedResourceLoader(); |
| for (size_t i = 0; i < m_fontsToBeginLoading.size(); ++i) { |
| // Balances incrementRequestCount() in beginLoadingFontSoon(). |
| cachedResourceLoader->decrementRequestCount(m_fontsToBeginLoading[i].get()); |
| } |
| |
| m_fontsToBeginLoading.clear(); |
| |
| m_document = 0; |
| } |
| |
| void CSSFontSelector::beginLoadingFontSoon(CachedFont* font) |
| { |
| if (!m_document) |
| return; |
| |
| m_fontsToBeginLoading.append(font); |
| // Increment the request count now, in order to prevent didFinishLoad from being dispatched |
| // after this font has been requested but before it began loading. Balanced by |
| // decrementRequestCount() in beginLoadTimerFired() and in clearDocument(). |
| m_document->cachedResourceLoader()->incrementRequestCount(font); |
| m_beginLoadingTimer.startOneShot(0); |
| } |
| |
| void CSSFontSelector::beginLoadTimerFired(Timer<WebCore::CSSFontSelector>*) |
| { |
| Vector<CachedResourceHandle<CachedFont> > fontsToBeginLoading; |
| fontsToBeginLoading.swap(m_fontsToBeginLoading); |
| |
| // CSSFontSelector could get deleted via beginLoadIfNeeded() or loadDone() unless protected. |
| RefPtr<CSSFontSelector> protect(this); |
| |
| CachedResourceLoader* cachedResourceLoader = m_document->cachedResourceLoader(); |
| for (size_t i = 0; i < fontsToBeginLoading.size(); ++i) { |
| fontsToBeginLoading[i]->beginLoadIfNeeded(cachedResourceLoader); |
| // Balances incrementRequestCount() in beginLoadingFontSoon(). |
| cachedResourceLoader->decrementRequestCount(fontsToBeginLoading[i].get()); |
| } |
| // Ensure that if the request count reaches zero, the frame loader will know about it. |
| cachedResourceLoader->loadDone(); |
| // New font loads may be triggered by layout after the document load is complete but before we have dispatched |
| // didFinishLoading for the frame. Make sure the delegate is always dispatched by checking explicitly. |
| if (m_document && m_document->frame()) |
| m_document->frame()->loader()->checkLoadComplete(); |
| } |
| |
| } |
