| /* |
| * Copyright (C) 2013 Google 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: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "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 THE COPYRIGHT |
| * OWNER 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 "core/css/FontFace.h" |
| |
| #include "bindings/core/v8/ExceptionState.h" |
| #include "bindings/core/v8/ScriptState.h" |
| #include "bindings/core/v8/StringOrArrayBufferOrArrayBufferView.h" |
| #include "core/CSSValueKeywords.h" |
| #include "core/css/BinaryDataFontFaceSource.h" |
| #include "core/css/CSSFontFace.h" |
| #include "core/css/CSSFontFaceSrcValue.h" |
| #include "core/css/CSSFontFamilyValue.h" |
| #include "core/css/CSSFontSelector.h" |
| #include "core/css/CSSIdentifierValue.h" |
| #include "core/css/CSSUnicodeRangeValue.h" |
| #include "core/css/CSSValueList.h" |
| #include "core/css/FontFaceDescriptors.h" |
| #include "core/css/LocalFontFaceSource.h" |
| #include "core/css/RemoteFontFaceSource.h" |
| #include "core/css/StylePropertySet.h" |
| #include "core/css/StyleRule.h" |
| #include "core/css/parser/CSSParser.h" |
| #include "core/dom/DOMArrayBuffer.h" |
| #include "core/dom/DOMArrayBufferView.h" |
| #include "core/dom/DOMException.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/ExceptionCode.h" |
| #include "core/dom/StyleEngine.h" |
| #include "core/dom/TaskRunnerHelper.h" |
| #include "core/frame/LocalFrame.h" |
| #include "core/frame/Settings.h" |
| #include "core/frame/UseCounter.h" |
| #include "platform/FontFamilyNames.h" |
| #include "platform/Histogram.h" |
| #include "platform/SharedBuffer.h" |
| #include "platform/WebTaskRunner.h" |
| |
| namespace blink { |
| |
| static const CSSValue* parseCSSValue(const Document* document, |
| const String& value, |
| CSSPropertyID propertyID) { |
| CSSParserContext context(*document, UseCounter::getFrom(document)); |
| return CSSParser::parseFontFaceDescriptor(propertyID, value, context); |
| } |
| |
| FontFace* FontFace::create(ExecutionContext* context, |
| const AtomicString& family, |
| StringOrArrayBufferOrArrayBufferView& source, |
| const FontFaceDescriptors& descriptors) { |
| if (source.isString()) |
| return create(context, family, source.getAsString(), descriptors); |
| if (source.isArrayBuffer()) |
| return create(context, family, source.getAsArrayBuffer(), descriptors); |
| if (source.isArrayBufferView()) |
| return create(context, family, source.getAsArrayBufferView(), descriptors); |
| NOTREACHED(); |
| return nullptr; |
| } |
| |
| FontFace* FontFace::create(ExecutionContext* context, |
| const AtomicString& family, |
| const String& source, |
| const FontFaceDescriptors& descriptors) { |
| FontFace* fontFace = new FontFace(context, family, descriptors); |
| |
| const CSSValue* src = |
| parseCSSValue(toDocument(context), source, CSSPropertySrc); |
| if (!src || !src->isValueList()) |
| fontFace->setError(DOMException::create( |
| SyntaxError, "The source provided ('" + source + |
| "') could not be parsed as a value list.")); |
| |
| fontFace->initCSSFontFace(toDocument(context), src); |
| return fontFace; |
| } |
| |
| FontFace* FontFace::create(ExecutionContext* context, |
| const AtomicString& family, |
| DOMArrayBuffer* source, |
| const FontFaceDescriptors& descriptors) { |
| FontFace* fontFace = new FontFace(context, family, descriptors); |
| fontFace->initCSSFontFace(static_cast<const unsigned char*>(source->data()), |
| source->byteLength()); |
| return fontFace; |
| } |
| |
| FontFace* FontFace::create(ExecutionContext* context, |
| const AtomicString& family, |
| DOMArrayBufferView* source, |
| const FontFaceDescriptors& descriptors) { |
| FontFace* fontFace = new FontFace(context, family, descriptors); |
| fontFace->initCSSFontFace( |
| static_cast<const unsigned char*>(source->baseAddress()), |
| source->byteLength()); |
| return fontFace; |
| } |
| |
| FontFace* FontFace::create(Document* document, |
| const StyleRuleFontFace* fontFaceRule) { |
| const StylePropertySet& properties = fontFaceRule->properties(); |
| |
| // Obtain the font-family property and the src property. Both must be defined. |
| const CSSValue* family = |
| properties.getPropertyCSSValue(CSSPropertyFontFamily); |
| if (!family || (!family->isFontFamilyValue() && !family->isIdentifierValue())) |
| return nullptr; |
| const CSSValue* src = properties.getPropertyCSSValue(CSSPropertySrc); |
| if (!src || !src->isValueList()) |
| return nullptr; |
| |
| FontFace* fontFace = new FontFace(document); |
| |
| if (fontFace->setFamilyValue(*family) && |
| fontFace->setPropertyFromStyle(properties, CSSPropertyFontStyle) && |
| fontFace->setPropertyFromStyle(properties, CSSPropertyFontWeight) && |
| fontFace->setPropertyFromStyle(properties, CSSPropertyFontStretch) && |
| fontFace->setPropertyFromStyle(properties, CSSPropertyUnicodeRange) && |
| fontFace->setPropertyFromStyle(properties, CSSPropertyFontVariant) && |
| fontFace->setPropertyFromStyle(properties, |
| CSSPropertyFontFeatureSettings) && |
| fontFace->setPropertyFromStyle(properties, CSSPropertyFontDisplay) && |
| !fontFace->family().isEmpty() && fontFace->traits().bitfield()) { |
| fontFace->initCSSFontFace(document, src); |
| return fontFace; |
| } |
| return nullptr; |
| } |
| |
| FontFace::FontFace(ExecutionContext* context) |
| : ContextLifecycleObserver(context), m_status(Unloaded) {} |
| |
| FontFace::FontFace(ExecutionContext* context, |
| const AtomicString& family, |
| const FontFaceDescriptors& descriptors) |
| : ContextLifecycleObserver(context), m_family(family), m_status(Unloaded) { |
| Document* document = toDocument(context); |
| setPropertyFromString(document, descriptors.style(), CSSPropertyFontStyle); |
| setPropertyFromString(document, descriptors.weight(), CSSPropertyFontWeight); |
| setPropertyFromString(document, descriptors.stretch(), |
| CSSPropertyFontStretch); |
| setPropertyFromString(document, descriptors.unicodeRange(), |
| CSSPropertyUnicodeRange); |
| setPropertyFromString(document, descriptors.variant(), |
| CSSPropertyFontVariant); |
| setPropertyFromString(document, descriptors.featureSettings(), |
| CSSPropertyFontFeatureSettings); |
| } |
| |
| FontFace::~FontFace() {} |
| |
| String FontFace::style() const { |
| return m_style ? m_style->cssText() : "normal"; |
| } |
| |
| String FontFace::weight() const { |
| return m_weight ? m_weight->cssText() : "normal"; |
| } |
| |
| String FontFace::stretch() const { |
| return m_stretch ? m_stretch->cssText() : "normal"; |
| } |
| |
| String FontFace::unicodeRange() const { |
| return m_unicodeRange ? m_unicodeRange->cssText() : "U+0-10FFFF"; |
| } |
| |
| String FontFace::variant() const { |
| return m_variant ? m_variant->cssText() : "normal"; |
| } |
| |
| String FontFace::featureSettings() const { |
| return m_featureSettings ? m_featureSettings->cssText() : "normal"; |
| } |
| |
| void FontFace::setStyle(ExecutionContext* context, |
| const String& s, |
| ExceptionState& exceptionState) { |
| setPropertyFromString(toDocument(context), s, CSSPropertyFontStyle, |
| &exceptionState); |
| } |
| |
| void FontFace::setWeight(ExecutionContext* context, |
| const String& s, |
| ExceptionState& exceptionState) { |
| setPropertyFromString(toDocument(context), s, CSSPropertyFontWeight, |
| &exceptionState); |
| } |
| |
| void FontFace::setStretch(ExecutionContext* context, |
| const String& s, |
| ExceptionState& exceptionState) { |
| setPropertyFromString(toDocument(context), s, CSSPropertyFontStretch, |
| &exceptionState); |
| } |
| |
| void FontFace::setUnicodeRange(ExecutionContext* context, |
| const String& s, |
| ExceptionState& exceptionState) { |
| setPropertyFromString(toDocument(context), s, CSSPropertyUnicodeRange, |
| &exceptionState); |
| } |
| |
| void FontFace::setVariant(ExecutionContext* context, |
| const String& s, |
| ExceptionState& exceptionState) { |
| setPropertyFromString(toDocument(context), s, CSSPropertyFontVariant, |
| &exceptionState); |
| } |
| |
| void FontFace::setFeatureSettings(ExecutionContext* context, |
| const String& s, |
| ExceptionState& exceptionState) { |
| setPropertyFromString(toDocument(context), s, CSSPropertyFontFeatureSettings, |
| &exceptionState); |
| } |
| |
| void FontFace::setPropertyFromString(const Document* document, |
| const String& s, |
| CSSPropertyID propertyID, |
| ExceptionState* exceptionState) { |
| const CSSValue* value = parseCSSValue(document, s, propertyID); |
| if (value && setPropertyValue(value, propertyID)) |
| return; |
| |
| String message = "Failed to set '" + s + "' as a property value."; |
| if (exceptionState) |
| exceptionState->throwDOMException(SyntaxError, message); |
| else |
| setError(DOMException::create(SyntaxError, message)); |
| } |
| |
| bool FontFace::setPropertyFromStyle(const StylePropertySet& properties, |
| CSSPropertyID propertyID) { |
| return setPropertyValue(properties.getPropertyCSSValue(propertyID), |
| propertyID); |
| } |
| |
| bool FontFace::setPropertyValue(const CSSValue* value, |
| CSSPropertyID propertyID) { |
| switch (propertyID) { |
| case CSSPropertyFontStyle: |
| m_style = value; |
| break; |
| case CSSPropertyFontWeight: |
| m_weight = value; |
| break; |
| case CSSPropertyFontStretch: |
| m_stretch = value; |
| break; |
| case CSSPropertyUnicodeRange: |
| if (value && !value->isValueList()) |
| return false; |
| m_unicodeRange = value; |
| break; |
| case CSSPropertyFontVariant: |
| m_variant = value; |
| break; |
| case CSSPropertyFontFeatureSettings: |
| m_featureSettings = value; |
| break; |
| case CSSPropertyFontDisplay: |
| m_display = value; |
| break; |
| default: |
| NOTREACHED(); |
| return false; |
| } |
| return true; |
| } |
| |
| bool FontFace::setFamilyValue(const CSSValue& familyValue) { |
| AtomicString family; |
| if (familyValue.isFontFamilyValue()) { |
| family = AtomicString(toCSSFontFamilyValue(familyValue).value()); |
| } else if (familyValue.isIdentifierValue()) { |
| // 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 (toCSSIdentifierValue(familyValue).getValueID()) { |
| case CSSValueSerif: |
| family = FontFamilyNames::webkit_serif; |
| break; |
| case CSSValueSansSerif: |
| family = FontFamilyNames::webkit_sans_serif; |
| break; |
| case CSSValueCursive: |
| family = FontFamilyNames::webkit_cursive; |
| break; |
| case CSSValueFantasy: |
| family = FontFamilyNames::webkit_fantasy; |
| break; |
| case CSSValueMonospace: |
| family = FontFamilyNames::webkit_monospace; |
| break; |
| case CSSValueWebkitPictograph: |
| family = FontFamilyNames::webkit_pictograph; |
| break; |
| default: |
| return false; |
| } |
| } |
| m_family = family; |
| return true; |
| } |
| |
| String FontFace::status() const { |
| switch (m_status) { |
| case Unloaded: |
| return "unloaded"; |
| case Loading: |
| return "loading"; |
| case Loaded: |
| return "loaded"; |
| case Error: |
| return "error"; |
| default: |
| NOTREACHED(); |
| } |
| return emptyString(); |
| } |
| |
| void FontFace::setLoadStatus(LoadStatusType status) { |
| m_status = status; |
| ASSERT(m_status != Error || m_error); |
| |
| // When promises are resolved with 'thenables', instead of the object being |
| // returned directly, the 'then' method is executed (the resolver tries to |
| // resolve the thenable). This can lead to synchronous script execution, so we |
| // post a task. This does not apply to promise rejection (i.e. a thenable |
| // would be returned as is). |
| if (m_status == Loaded || m_status == Error) { |
| if (m_loadedProperty) { |
| if (m_status == Loaded) { |
| getTaskRunner()->postTask( |
| BLINK_FROM_HERE, WTF::bind(&LoadedProperty::resolve<FontFace*>, |
| wrapPersistent(m_loadedProperty.get()), |
| wrapPersistent(this))); |
| } else |
| m_loadedProperty->reject(m_error.get()); |
| } |
| |
| getTaskRunner()->postTask( |
| BLINK_FROM_HERE, |
| WTF::bind(&FontFace::runCallbacks, wrapPersistent(this))); |
| } |
| } |
| |
| WebTaskRunner* FontFace::getTaskRunner() { |
| return TaskRunnerHelper::get(TaskType::DOMManipulation, getExecutionContext()) |
| .get(); |
| } |
| |
| void FontFace::runCallbacks() { |
| HeapVector<Member<LoadFontCallback>> callbacks; |
| m_callbacks.swap(callbacks); |
| for (size_t i = 0; i < callbacks.size(); ++i) { |
| if (m_status == Loaded) |
| callbacks[i]->notifyLoaded(this); |
| else |
| callbacks[i]->notifyError(this); |
| } |
| } |
| |
| void FontFace::setError(DOMException* error) { |
| if (!m_error) |
| m_error = error ? error : DOMException::create(NetworkError); |
| setLoadStatus(Error); |
| } |
| |
| ScriptPromise FontFace::fontStatusPromise(ScriptState* scriptState) { |
| if (!m_loadedProperty) { |
| m_loadedProperty = new LoadedProperty(scriptState->getExecutionContext(), |
| this, LoadedProperty::Loaded); |
| if (m_status == Loaded) |
| m_loadedProperty->resolve(this); |
| else if (m_status == Error) |
| m_loadedProperty->reject(m_error.get()); |
| } |
| return m_loadedProperty->promise(scriptState->world()); |
| } |
| |
| ScriptPromise FontFace::load(ScriptState* scriptState) { |
| if (m_status == Unloaded) |
| m_cssFontFace->load(); |
| return fontStatusPromise(scriptState); |
| } |
| |
| void FontFace::loadWithCallback(LoadFontCallback* callback) { |
| if (m_status == Unloaded) |
| m_cssFontFace->load(); |
| addCallback(callback); |
| } |
| |
| void FontFace::addCallback(LoadFontCallback* callback) { |
| if (m_status == Loaded) |
| callback->notifyLoaded(this); |
| else if (m_status == Error) |
| callback->notifyError(this); |
| else |
| m_callbacks.push_back(callback); |
| } |
| |
| FontTraits FontFace::traits() const { |
| FontStretch stretch = FontStretchNormal; |
| if (m_stretch) { |
| if (!m_stretch->isIdentifierValue()) |
| return 0; |
| |
| switch (toCSSIdentifierValue(m_stretch.get())->getValueID()) { |
| case CSSValueUltraCondensed: |
| stretch = FontStretchUltraCondensed; |
| break; |
| case CSSValueExtraCondensed: |
| stretch = FontStretchExtraCondensed; |
| break; |
| case CSSValueCondensed: |
| stretch = FontStretchCondensed; |
| break; |
| case CSSValueSemiCondensed: |
| stretch = FontStretchSemiCondensed; |
| break; |
| case CSSValueSemiExpanded: |
| stretch = FontStretchSemiExpanded; |
| break; |
| case CSSValueExpanded: |
| stretch = FontStretchExpanded; |
| break; |
| case CSSValueExtraExpanded: |
| stretch = FontStretchExtraExpanded; |
| break; |
| case CSSValueUltraExpanded: |
| stretch = FontStretchUltraExpanded; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| FontStyle style = FontStyleNormal; |
| if (m_style) { |
| if (!m_style->isIdentifierValue()) |
| return 0; |
| |
| switch (toCSSIdentifierValue(m_style.get())->getValueID()) { |
| case CSSValueNormal: |
| style = FontStyleNormal; |
| break; |
| case CSSValueOblique: |
| style = FontStyleOblique; |
| break; |
| case CSSValueItalic: |
| style = FontStyleItalic; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| FontWeight weight = FontWeight400; |
| if (m_weight) { |
| if (!m_weight->isIdentifierValue()) |
| return 0; |
| |
| switch (toCSSIdentifierValue(m_weight.get())->getValueID()) { |
| case CSSValueBold: |
| case CSSValue700: |
| weight = FontWeight700; |
| break; |
| case CSSValueNormal: |
| case CSSValue400: |
| weight = FontWeight400; |
| break; |
| case CSSValue900: |
| weight = FontWeight900; |
| break; |
| case CSSValue800: |
| weight = FontWeight800; |
| break; |
| case CSSValue600: |
| weight = FontWeight600; |
| break; |
| case CSSValue500: |
| weight = FontWeight500; |
| break; |
| case CSSValue300: |
| weight = FontWeight300; |
| break; |
| case CSSValue200: |
| weight = FontWeight200; |
| break; |
| case CSSValue100: |
| weight = FontWeight100; |
| break; |
| // Although 'lighter' and 'bolder' are valid keywords for font-weights, |
| // they are invalid inside font-face rules so they are ignored. Reference: |
| // http://www.w3.org/TR/css3-fonts/#descdef-font-weight. |
| case CSSValueLighter: |
| case CSSValueBolder: |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| break; |
| } |
| } |
| |
| return FontTraits(style, weight, stretch); |
| } |
| |
| size_t FontFace::approximateBlankCharacterCount() const { |
| if (m_status == Loading) |
| return m_cssFontFace->approximateBlankCharacterCount(); |
| return 0; |
| } |
| |
| static FontDisplay CSSValueToFontDisplay(const CSSValue* value) { |
| if (value && value->isIdentifierValue()) { |
| switch (toCSSIdentifierValue(value)->getValueID()) { |
| case CSSValueAuto: |
| return FontDisplayAuto; |
| case CSSValueBlock: |
| return FontDisplayBlock; |
| case CSSValueSwap: |
| return FontDisplaySwap; |
| case CSSValueFallback: |
| return FontDisplayFallback; |
| case CSSValueOptional: |
| return FontDisplayOptional; |
| default: |
| break; |
| } |
| } |
| return FontDisplayAuto; |
| } |
| |
| static CSSFontFace* createCSSFontFace(FontFace* fontFace, |
| const CSSValue* unicodeRange) { |
| Vector<UnicodeRange> ranges; |
| if (const CSSValueList* rangeList = toCSSValueList(unicodeRange)) { |
| unsigned numRanges = rangeList->length(); |
| for (unsigned i = 0; i < numRanges; i++) { |
| const CSSUnicodeRangeValue& range = |
| toCSSUnicodeRangeValue(rangeList->item(i)); |
| ranges.push_back(UnicodeRange(range.from(), range.to())); |
| } |
| } |
| |
| return new CSSFontFace(fontFace, ranges); |
| } |
| |
| void FontFace::initCSSFontFace(Document* document, const CSSValue* src) { |
| m_cssFontFace = createCSSFontFace(this, m_unicodeRange.get()); |
| if (m_error) |
| return; |
| |
| // Each item in the src property's list is a single CSSFontFaceSource. Put |
| // them all into a CSSFontFace. |
| ASSERT(src); |
| ASSERT(src->isValueList()); |
| const CSSValueList* srcList = toCSSValueList(src); |
| int srcLength = srcList->length(); |
| |
| 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). |
| const CSSFontFaceSrcValue& item = toCSSFontFaceSrcValue(srcList->item(i)); |
| CSSFontFaceSource* source = nullptr; |
| |
| if (!item.isLocal()) { |
| const Settings* settings = document ? document->settings() : nullptr; |
| bool allowDownloading = |
| settings && settings->getDownloadableBinaryFontsEnabled(); |
| if (allowDownloading && item.isSupportedFormat() && document) { |
| FontResource* fetched = item.fetch(document); |
| if (fetched) { |
| CSSFontSelector* fontSelector = |
| document->styleEngine().fontSelector(); |
| source = new RemoteFontFaceSource( |
| fetched, fontSelector, CSSValueToFontDisplay(m_display.get())); |
| } |
| } |
| } else { |
| source = new LocalFontFaceSource(item.resource()); |
| } |
| |
| if (source) |
| m_cssFontFace->addSource(source); |
| } |
| |
| if (m_display) { |
| DEFINE_STATIC_LOCAL(EnumerationHistogram, fontDisplayHistogram, |
| ("WebFont.FontDisplayValue", FontDisplayEnumMax)); |
| fontDisplayHistogram.count(CSSValueToFontDisplay(m_display.get())); |
| } |
| } |
| |
| void FontFace::initCSSFontFace(const unsigned char* data, size_t size) { |
| m_cssFontFace = createCSSFontFace(this, m_unicodeRange.get()); |
| if (m_error) |
| return; |
| |
| RefPtr<SharedBuffer> buffer = SharedBuffer::create(data, size); |
| BinaryDataFontFaceSource* source = |
| new BinaryDataFontFaceSource(buffer.get(), m_otsParseMessage); |
| if (source->isValid()) |
| setLoadStatus(Loaded); |
| else |
| setError( |
| DOMException::create(SyntaxError, "Invalid font data in ArrayBuffer.")); |
| m_cssFontFace->addSource(source); |
| } |
| |
| DEFINE_TRACE(FontFace) { |
| visitor->trace(m_style); |
| visitor->trace(m_weight); |
| visitor->trace(m_stretch); |
| visitor->trace(m_unicodeRange); |
| visitor->trace(m_variant); |
| visitor->trace(m_featureSettings); |
| visitor->trace(m_display); |
| visitor->trace(m_error); |
| visitor->trace(m_loadedProperty); |
| visitor->trace(m_cssFontFace); |
| visitor->trace(m_callbacks); |
| ContextLifecycleObserver::trace(visitor); |
| } |
| |
| bool FontFace::hadBlankText() const { |
| return m_cssFontFace->hadBlankText(); |
| } |
| |
| bool FontFace::hasPendingActivity() const { |
| return m_status == Loading && getExecutionContext(); |
| } |
| |
| } // namespace blink |
