| /* |
| * Copyright (C) 2016 Apple Inc. All rights reserved. |
| * |
| * 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 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 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 "CSSFontFaceSet.h" |
| |
| #include "CSSFontFaceSource.h" |
| #include "CSSFontFamily.h" |
| #include "CSSFontSelector.h" |
| #include "CSSFontStyleValue.h" |
| #include "CSSParser.h" |
| #include "CSSPrimitiveValue.h" |
| #include "CSSSegmentedFontFace.h" |
| #include "CSSValueList.h" |
| #include "CSSValuePool.h" |
| #include "FontCache.h" |
| #include "StyleBuilderConverter.h" |
| #include "StyleProperties.h" |
| |
| namespace WebCore { |
| |
| CSSFontFaceSet::CSSFontFaceSet(CSSFontSelector* owningFontSelector) |
| : m_owningFontSelector(makeWeakPtr(owningFontSelector)) |
| { |
| } |
| |
| CSSFontFaceSet::~CSSFontFaceSet() |
| { |
| for (auto& face : m_faces) |
| face->removeClient(*this); |
| |
| for (auto& pair : m_locallyInstalledFacesLookupTable) { |
| for (auto& face : pair.value) |
| face->removeClient(*this); |
| } |
| } |
| |
| void CSSFontFaceSet::addClient(CSSFontFaceSetClient& client) |
| { |
| m_clients.add(&client); |
| } |
| |
| void CSSFontFaceSet::removeClient(CSSFontFaceSetClient& client) |
| { |
| ASSERT(m_clients.contains(&client)); |
| m_clients.remove(&client); |
| } |
| |
| void CSSFontFaceSet::incrementActiveCount() |
| { |
| ++m_activeCount; |
| if (m_activeCount == 1) { |
| m_status = Status::Loading; |
| for (auto* client : m_clients) |
| client->startedLoading(); |
| } |
| } |
| |
| void CSSFontFaceSet::decrementActiveCount() |
| { |
| --m_activeCount; |
| if (!m_activeCount) { |
| m_status = Status::Loaded; |
| for (auto* client : m_clients) |
| client->completedLoading(); |
| } |
| } |
| |
| bool CSSFontFaceSet::hasFace(const CSSFontFace& face) const |
| { |
| for (auto& myFace : m_faces) { |
| if (myFace.ptr() == &face) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| void CSSFontFaceSet::ensureLocalFontFacesForFamilyRegistered(const String& familyName) |
| { |
| ASSERT(m_owningFontSelector); |
| if (m_locallyInstalledFacesLookupTable.contains(familyName)) |
| return; |
| |
| AllowUserInstalledFonts allowUserInstalledFonts = AllowUserInstalledFonts::Yes; |
| if (m_owningFontSelector->document()) |
| allowUserInstalledFonts = m_owningFontSelector->document()->settings().shouldAllowUserInstalledFonts() ? AllowUserInstalledFonts::Yes : AllowUserInstalledFonts::No; |
| Vector<FontSelectionCapabilities> capabilities = FontCache::singleton().getFontSelectionCapabilitiesInFamily(familyName, allowUserInstalledFonts); |
| if (capabilities.isEmpty()) |
| return; |
| |
| Vector<Ref<CSSFontFace>> faces; |
| for (auto item : capabilities) { |
| Ref<CSSFontFace> face = CSSFontFace::create(m_owningFontSelector.get(), nullptr, nullptr, true); |
| |
| Ref<CSSValueList> familyList = CSSValueList::createCommaSeparated(); |
| familyList->append(CSSValuePool::singleton().createFontFamilyValue(familyName)); |
| face->setFamilies(familyList.get()); |
| face->setFontSelectionCapabilities(item); |
| face->adoptSource(std::make_unique<CSSFontFaceSource>(face.get(), familyName)); |
| ASSERT(!face->computeFailureState()); |
| faces.append(WTFMove(face)); |
| } |
| m_locallyInstalledFacesLookupTable.add(familyName, WTFMove(faces)); |
| } |
| |
| String CSSFontFaceSet::familyNameFromPrimitive(const CSSPrimitiveValue& value) |
| { |
| if (value.isFontFamily()) |
| return value.fontFamily().familyName; |
| if (!value.isValueID()) |
| return { }; |
| |
| // 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 (value.valueID()) { |
| case CSSValueSerif: |
| return serifFamily.get(); |
| case CSSValueSansSerif: |
| return sansSerifFamily.get(); |
| case CSSValueCursive: |
| return cursiveFamily.get(); |
| case CSSValueFantasy: |
| return fantasyFamily.get(); |
| case CSSValueMonospace: |
| return monospaceFamily.get(); |
| case CSSValueWebkitPictograph: |
| return pictographFamily.get(); |
| case CSSValueSystemUi: |
| return systemUiFamily.get(); |
| default: |
| return { }; |
| } |
| } |
| |
| void CSSFontFaceSet::addToFacesLookupTable(CSSFontFace& face) |
| { |
| if (!face.families()) |
| return; |
| |
| for (auto& item : *face.families()) { |
| String familyName = CSSFontFaceSet::familyNameFromPrimitive(downcast<CSSPrimitiveValue>(item.get())); |
| if (familyName.isEmpty()) |
| continue; |
| |
| auto addResult = m_facesLookupTable.add(familyName, Vector<Ref<CSSFontFace>>()); |
| auto& familyFontFaces = addResult.iterator->value; |
| if (addResult.isNewEntry) { |
| // m_locallyInstalledFontFaces grows without bound, eventually encorporating every font installed on the system. |
| // This is by design. |
| if (m_owningFontSelector) |
| ensureLocalFontFacesForFamilyRegistered(familyName); |
| familyFontFaces = { }; |
| } |
| |
| familyFontFaces.append(face); |
| } |
| } |
| |
| void CSSFontFaceSet::add(CSSFontFace& face) |
| { |
| ASSERT(!hasFace(face)); |
| |
| for (auto* client : m_clients) |
| client->fontModified(); |
| |
| face.addClient(*this); |
| m_cache.clear(); |
| |
| if (face.cssConnection()) |
| m_faces.insert(m_facesPartitionIndex++, face); |
| else |
| m_faces.append(face); |
| |
| addToFacesLookupTable(face); |
| |
| if (face.status() == CSSFontFace::Status::Loading || face.status() == CSSFontFace::Status::TimedOut) |
| incrementActiveCount(); |
| |
| if (face.cssConnection()) { |
| ASSERT(!m_constituentCSSConnections.contains(face.cssConnection())); |
| m_constituentCSSConnections.add(face.cssConnection(), &face); |
| } |
| } |
| |
| void CSSFontFaceSet::removeFromFacesLookupTable(const CSSFontFace& face, const CSSValueList& familiesToSearchFor) |
| { |
| for (auto& item : familiesToSearchFor) { |
| String familyName = CSSFontFaceSet::familyNameFromPrimitive(downcast<CSSPrimitiveValue>(item.get())); |
| if (familyName.isEmpty()) |
| continue; |
| |
| auto iterator = m_facesLookupTable.find(familyName); |
| ASSERT(iterator != m_facesLookupTable.end()); |
| bool found = false; |
| for (size_t i = 0; i < iterator->value.size(); ++i) { |
| if (iterator->value[i].ptr() == &face) { |
| found = true; |
| iterator->value.remove(i); |
| break; |
| } |
| } |
| ASSERT_UNUSED(found, found); |
| if (!iterator->value.size()) |
| m_facesLookupTable.remove(iterator); |
| } |
| } |
| |
| void CSSFontFaceSet::remove(const CSSFontFace& face) |
| { |
| auto protect = makeRef(face); |
| |
| m_cache.clear(); |
| |
| for (auto* client : m_clients) |
| client->fontModified(); |
| |
| if (face.families()) |
| removeFromFacesLookupTable(face, *face.families()); |
| |
| if (face.cssConnection()) { |
| ASSERT(m_constituentCSSConnections.get(face.cssConnection()) == &face); |
| m_constituentCSSConnections.remove(face.cssConnection()); |
| } |
| |
| for (size_t i = 0; i < m_faces.size(); ++i) { |
| if (m_faces[i].ptr() == &face) { |
| if (i < m_facesPartitionIndex) |
| --m_facesPartitionIndex; |
| m_faces[i]->removeClient(*this); |
| m_faces.remove(i); |
| if (face.status() == CSSFontFace::Status::Loading || face.status() == CSSFontFace::Status::TimedOut) |
| decrementActiveCount(); |
| return; |
| } |
| } |
| ASSERT_NOT_REACHED(); |
| } |
| |
| CSSFontFace* CSSFontFaceSet::lookUpByCSSConnection(StyleRuleFontFace& target) |
| { |
| return m_constituentCSSConnections.get(&target); |
| } |
| |
| void CSSFontFaceSet::purge() |
| { |
| Vector<Ref<CSSFontFace>> toRemove; |
| for (auto& face : m_faces) { |
| if (face->purgeable()) |
| toRemove.append(face.copyRef()); |
| } |
| |
| for (auto& item : toRemove) |
| remove(item.get()); |
| } |
| |
| void CSSFontFaceSet::emptyCaches() |
| { |
| m_cache.clear(); |
| } |
| |
| void CSSFontFaceSet::clear() |
| { |
| for (auto& face : m_faces) |
| face->removeClient(*this); |
| m_faces.clear(); |
| m_facesLookupTable.clear(); |
| m_locallyInstalledFacesLookupTable.clear(); |
| m_cache.clear(); |
| m_constituentCSSConnections.clear(); |
| m_facesPartitionIndex = 0; |
| m_status = Status::Loaded; |
| } |
| |
| CSSFontFace& CSSFontFaceSet::operator[](size_t i) |
| { |
| ASSERT(i < faceCount()); |
| return m_faces[i]; |
| } |
| |
| static FontSelectionRequest computeFontSelectionRequest(MutableStyleProperties& style) |
| { |
| RefPtr<CSSValue> weightValue = style.getPropertyCSSValue(CSSPropertyFontWeight).get(); |
| if (!weightValue) |
| weightValue = CSSValuePool::singleton().createIdentifierValue(CSSValueNormal).ptr(); |
| |
| RefPtr<CSSValue> stretchValue = style.getPropertyCSSValue(CSSPropertyFontStretch).get(); |
| if (!stretchValue) |
| stretchValue = CSSValuePool::singleton().createIdentifierValue(CSSValueNormal).ptr(); |
| |
| RefPtr<CSSValue> styleValue = style.getPropertyCSSValue(CSSPropertyFontStyle).get(); |
| if (!styleValue) |
| styleValue = CSSFontStyleValue::create(CSSValuePool::singleton().createIdentifierValue(CSSValueNormal)); |
| |
| auto weightSelectionValue = StyleBuilderConverter::convertFontWeightFromValue(*weightValue); |
| auto stretchSelectionValue = StyleBuilderConverter::convertFontStretchFromValue(*stretchValue); |
| auto styleSelectionValue = StyleBuilderConverter::convertFontStyleFromValue(*styleValue); |
| |
| return { weightSelectionValue, stretchSelectionValue, styleSelectionValue }; |
| } |
| |
| static HashSet<UChar32> codePointsFromString(StringView stringView) |
| { |
| HashSet<UChar32> result; |
| auto graphemeClusters = stringView.graphemeClusters(); |
| for (auto cluster : graphemeClusters) { |
| ASSERT(cluster.length() > 0); |
| UChar32 character = 0; |
| if (cluster.is8Bit()) |
| character = cluster[0]; |
| else |
| U16_GET(cluster.characters16(), 0, 0, cluster.length(), character); |
| result.add(character); |
| } |
| return result; |
| } |
| |
| ExceptionOr<Vector<std::reference_wrapper<CSSFontFace>>> CSSFontFaceSet::matchingFacesExcludingPreinstalledFonts(const String& font, const String& string) |
| { |
| auto style = MutableStyleProperties::create(); |
| auto parseResult = CSSParser::parseValue(style, CSSPropertyFont, font, true, HTMLStandardMode); |
| if (parseResult == CSSParser::ParseResult::Error) |
| return Exception { SyntaxError }; |
| |
| FontSelectionRequest request = computeFontSelectionRequest(style.get()); |
| |
| auto family = style->getPropertyCSSValue(CSSPropertyFontFamily); |
| if (!is<CSSValueList>(family)) |
| return Exception { SyntaxError }; |
| CSSValueList& familyList = downcast<CSSValueList>(*family); |
| |
| HashSet<AtomicString> uniqueFamilies; |
| Vector<AtomicString> familyOrder; |
| for (auto& family : familyList) { |
| auto& primitive = downcast<CSSPrimitiveValue>(family.get()); |
| if (!primitive.isFontFamily()) |
| continue; |
| if (uniqueFamilies.add(primitive.fontFamily().familyName).isNewEntry) |
| familyOrder.append(primitive.fontFamily().familyName); |
| } |
| |
| HashSet<CSSFontFace*> resultConstituents; |
| for (auto codePoint : codePointsFromString(string)) { |
| bool found = false; |
| for (auto& family : familyOrder) { |
| auto* faces = fontFace(request, family); |
| if (!faces) |
| continue; |
| for (auto& constituentFace : faces->constituentFaces()) { |
| if (constituentFace->isLocalFallback()) |
| continue; |
| if (constituentFace->rangesMatchCodePoint(codePoint)) { |
| resultConstituents.add(constituentFace.ptr()); |
| found = true; |
| break; |
| } |
| } |
| if (found) |
| break; |
| } |
| } |
| |
| Vector<std::reference_wrapper<CSSFontFace>> result; |
| result.reserveInitialCapacity(resultConstituents.size()); |
| for (auto* constituent : resultConstituents) |
| result.uncheckedAppend(*constituent); |
| return result; |
| } |
| |
| ExceptionOr<bool> CSSFontFaceSet::check(const String& font, const String& text) |
| { |
| auto matchingFaces = this->matchingFacesExcludingPreinstalledFonts(font, text); |
| if (matchingFaces.hasException()) |
| return matchingFaces.releaseException(); |
| |
| for (auto& face : matchingFaces.releaseReturnValue()) { |
| if (face.get().status() == CSSFontFace::Status::Pending) |
| return false; |
| } |
| return true; |
| } |
| |
| CSSSegmentedFontFace* CSSFontFaceSet::fontFace(FontSelectionRequest request, const AtomicString& family) |
| { |
| auto iterator = m_facesLookupTable.find(family); |
| if (iterator == m_facesLookupTable.end()) |
| return nullptr; |
| auto& familyFontFaces = iterator->value; |
| |
| auto& segmentedFontFaceCache = m_cache.add(family, FontSelectionHashMap()).iterator->value; |
| |
| auto& face = segmentedFontFaceCache.add(request, nullptr).iterator->value; |
| if (face) |
| return face.get(); |
| |
| face = CSSSegmentedFontFace::create(); |
| |
| Vector<std::reference_wrapper<CSSFontFace>, 32> candidateFontFaces; |
| for (int i = familyFontFaces.size() - 1; i >= 0; --i) { |
| CSSFontFace& candidate = familyFontFaces[i]; |
| auto capabilities = candidate.fontSelectionCapabilities(); |
| if (!isItalic(request.slope) && isItalic(capabilities.slope.minimum)) |
| continue; |
| candidateFontFaces.append(candidate); |
| } |
| |
| auto localIterator = m_locallyInstalledFacesLookupTable.find(family); |
| if (localIterator != m_locallyInstalledFacesLookupTable.end()) { |
| for (auto& candidate : localIterator->value) { |
| auto capabilities = candidate->fontSelectionCapabilities(); |
| if (!isItalic(request.slope) && isItalic(capabilities.slope.minimum)) |
| continue; |
| candidateFontFaces.append(candidate); |
| } |
| } |
| |
| if (!candidateFontFaces.isEmpty()) { |
| Vector<FontSelectionCapabilities> capabilities; |
| capabilities.reserveInitialCapacity(candidateFontFaces.size()); |
| for (auto& face : candidateFontFaces) |
| capabilities.uncheckedAppend(face.get().fontSelectionCapabilities()); |
| FontSelectionAlgorithm fontSelectionAlgorithm(request, capabilities); |
| std::stable_sort(candidateFontFaces.begin(), candidateFontFaces.end(), [&fontSelectionAlgorithm](const CSSFontFace& first, const CSSFontFace& second) { |
| auto firstCapabilities = first.fontSelectionCapabilities(); |
| auto secondCapabilities = second.fontSelectionCapabilities(); |
| |
| auto stretchDistanceFirst = fontSelectionAlgorithm.stretchDistance(firstCapabilities).distance; |
| auto stretchDistanceSecond = fontSelectionAlgorithm.stretchDistance(secondCapabilities).distance; |
| if (stretchDistanceFirst < stretchDistanceSecond) |
| return true; |
| if (stretchDistanceFirst > stretchDistanceSecond) |
| return false; |
| |
| auto styleDistanceFirst = fontSelectionAlgorithm.styleDistance(firstCapabilities).distance; |
| auto styleDistanceSecond = fontSelectionAlgorithm.styleDistance(secondCapabilities).distance; |
| if (styleDistanceFirst < styleDistanceSecond) |
| return true; |
| if (styleDistanceFirst > styleDistanceSecond) |
| return false; |
| |
| auto weightDistanceFirst = fontSelectionAlgorithm.weightDistance(firstCapabilities).distance; |
| auto weightDistanceSecond = fontSelectionAlgorithm.weightDistance(secondCapabilities).distance; |
| if (weightDistanceFirst < weightDistanceSecond) |
| return true; |
| return false; |
| }); |
| for (auto& candidate : candidateFontFaces) |
| face->appendFontFace(candidate.get()); |
| } |
| |
| return face.get(); |
| } |
| |
| void CSSFontFaceSet::fontStateChanged(CSSFontFace& face, CSSFontFace::Status oldState, CSSFontFace::Status newState) |
| { |
| ASSERT(hasFace(face)); |
| if (oldState == CSSFontFace::Status::Pending) { |
| ASSERT(newState == CSSFontFace::Status::Loading); |
| incrementActiveCount(); |
| } |
| if (newState == CSSFontFace::Status::Success || newState == CSSFontFace::Status::Failure) { |
| ASSERT(oldState == CSSFontFace::Status::Loading || oldState == CSSFontFace::Status::TimedOut); |
| for (auto* client : m_clients) |
| client->faceFinished(face, newState); |
| decrementActiveCount(); |
| } |
| } |
| |
| void CSSFontFaceSet::fontPropertyChanged(CSSFontFace& face, CSSValueList* oldFamilies) |
| { |
| m_cache.clear(); |
| |
| if (oldFamilies) { |
| removeFromFacesLookupTable(face, *oldFamilies); |
| addToFacesLookupTable(face); |
| } |
| |
| for (auto* client : m_clients) |
| client->fontModified(); |
| } |
| |
| } |
