| /* |
| * 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 "third_party/blink/renderer/core/css/font_face.h" |
| |
| #include "third_party/blink/public/platform/task_type.h" |
| #include "third_party/blink/renderer/bindings/core/v8/string_or_array_buffer_or_array_buffer_view.h" |
| #include "third_party/blink/renderer/core/css/binary_data_font_face_source.h" |
| #include "third_party/blink/renderer/core/css/css_font_face.h" |
| #include "third_party/blink/renderer/core/css/css_font_face_src_value.h" |
| #include "third_party/blink/renderer/core/css/css_font_family_value.h" |
| #include "third_party/blink/renderer/core/css/css_font_selector.h" |
| #include "third_party/blink/renderer/core/css/css_font_style_range_value.h" |
| #include "third_party/blink/renderer/core/css/css_identifier_value.h" |
| #include "third_party/blink/renderer/core/css/css_property_value_set.h" |
| #include "third_party/blink/renderer/core/css/css_unicode_range_value.h" |
| #include "third_party/blink/renderer/core/css/css_value_list.h" |
| #include "third_party/blink/renderer/core/css/font_face_descriptors.h" |
| #include "third_party/blink/renderer/core/css/local_font_face_source.h" |
| #include "third_party/blink/renderer/core/css/offscreen_font_selector.h" |
| #include "third_party/blink/renderer/core/css/parser/at_rule_descriptor_parser.h" |
| #include "third_party/blink/renderer/core/css/parser/css_parser.h" |
| #include "third_party/blink/renderer/core/css/remote_font_face_source.h" |
| #include "third_party/blink/renderer/core/css/style_engine.h" |
| #include "third_party/blink/renderer/core/css/style_rule.h" |
| #include "third_party/blink/renderer/core/css_value_keywords.h" |
| #include "third_party/blink/renderer/core/dom/document.h" |
| #include "third_party/blink/renderer/core/dom/dom_exception.h" |
| #include "third_party/blink/renderer/core/execution_context/execution_context.h" |
| #include "third_party/blink/renderer/core/frame/local_frame.h" |
| #include "third_party/blink/renderer/core/frame/settings.h" |
| #include "third_party/blink/renderer/core/frame/use_counter.h" |
| #include "third_party/blink/renderer/core/typed_arrays/dom_array_buffer.h" |
| #include "third_party/blink/renderer/core/typed_arrays/dom_array_buffer_view.h" |
| #include "third_party/blink/renderer/core/workers/worker_global_scope.h" |
| #include "third_party/blink/renderer/platform/bindings/exception_state.h" |
| #include "third_party/blink/renderer/platform/bindings/script_state.h" |
| #include "third_party/blink/renderer/platform/font_family_names.h" |
| #include "third_party/blink/renderer/platform/histogram.h" |
| #include "third_party/blink/renderer/platform/runtime_enabled_features.h" |
| #include "third_party/blink/renderer/platform/shared_buffer.h" |
| |
| namespace blink { |
| |
| namespace { |
| |
| const CSSValue* ParseCSSValue(const ExecutionContext* context, |
| const String& value, |
| AtRuleDescriptorID descriptor_id) { |
| CSSParserContext* parser_context = |
| IsA<Document>(context) ? CSSParserContext::Create(*To<Document>(context)) |
| : CSSParserContext::Create(*context); |
| return AtRuleDescriptorParser::ParseFontFaceDescriptor(descriptor_id, value, |
| *parser_context); |
| } |
| |
| FontDisplay CSSValueToFontDisplay(const CSSValue* value) { |
| if (value && value->IsIdentifierValue()) { |
| switch (ToCSSIdentifierValue(value)->GetValueID()) { |
| case CSSValueAuto: |
| return kFontDisplayAuto; |
| case CSSValueBlock: |
| return kFontDisplayBlock; |
| case CSSValueSwap: |
| return kFontDisplaySwap; |
| case CSSValueFallback: |
| return kFontDisplayFallback; |
| case CSSValueOptional: |
| return kFontDisplayOptional; |
| default: |
| break; |
| } |
| } |
| return kFontDisplayAuto; |
| } |
| |
| CSSFontFace* CreateCSSFontFace(FontFace* font_face, |
| const CSSValue* unicode_range) { |
| Vector<UnicodeRange> ranges; |
| if (const CSSValueList* range_list = ToCSSValueList(unicode_range)) { |
| unsigned num_ranges = range_list->length(); |
| for (unsigned i = 0; i < num_ranges; i++) { |
| const CSSUnicodeRangeValue& range = |
| ToCSSUnicodeRangeValue(range_list->Item(i)); |
| ranges.push_back(UnicodeRange(range.From(), range.To())); |
| } |
| } |
| |
| return MakeGarbageCollected<CSSFontFace>(font_face, ranges); |
| } |
| |
| } // namespace |
| |
| 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().View(), |
| descriptors); |
| } |
| NOTREACHED(); |
| return nullptr; |
| } |
| |
| FontFace* FontFace::Create(ExecutionContext* context, |
| const AtomicString& family, |
| const String& source, |
| const FontFaceDescriptors* descriptors) { |
| FontFace* font_face = new FontFace(context, family, descriptors); |
| |
| const CSSValue* src = ParseCSSValue(context, source, AtRuleDescriptorID::Src); |
| if (!src || !src->IsValueList()) { |
| font_face->SetError( |
| DOMException::Create(DOMExceptionCode::kSyntaxError, |
| "The source provided ('" + source + |
| "') could not be parsed as a value list.")); |
| } |
| |
| font_face->InitCSSFontFace(context, *src); |
| return font_face; |
| } |
| |
| FontFace* FontFace::Create(ExecutionContext* context, |
| const AtomicString& family, |
| DOMArrayBuffer* source, |
| const FontFaceDescriptors* descriptors) { |
| FontFace* font_face = new FontFace(context, family, descriptors); |
| font_face->InitCSSFontFace(static_cast<const unsigned char*>(source->Data()), |
| source->ByteLength()); |
| return font_face; |
| } |
| |
| FontFace* FontFace::Create(ExecutionContext* context, |
| const AtomicString& family, |
| DOMArrayBufferView* source, |
| const FontFaceDescriptors* descriptors) { |
| FontFace* font_face = new FontFace(context, family, descriptors); |
| font_face->InitCSSFontFace( |
| static_cast<const unsigned char*>(source->BaseAddress()), |
| source->byteLength()); |
| return font_face; |
| } |
| |
| FontFace* FontFace::Create(Document* document, |
| const StyleRuleFontFace* font_face_rule) { |
| const CSSPropertyValueSet& properties = font_face_rule->Properties(); |
| |
| // Obtain the font-family property and the src property. Both must be defined. |
| const CSSValue* family = |
| properties.GetPropertyCSSValue(AtRuleDescriptorID::FontFamily); |
| if (!family || (!family->IsFontFamilyValue() && !family->IsIdentifierValue())) |
| return nullptr; |
| const CSSValue* src = properties.GetPropertyCSSValue(AtRuleDescriptorID::Src); |
| if (!src || !src->IsValueList()) |
| return nullptr; |
| |
| FontFace* font_face = new FontFace(document); |
| |
| if (font_face->SetFamilyValue(*family) && |
| font_face->SetPropertyFromStyle(properties, |
| AtRuleDescriptorID::FontStyle) && |
| font_face->SetPropertyFromStyle(properties, |
| AtRuleDescriptorID::FontWeight) && |
| font_face->SetPropertyFromStyle(properties, |
| AtRuleDescriptorID::FontStretch) && |
| font_face->SetPropertyFromStyle(properties, |
| AtRuleDescriptorID::UnicodeRange) && |
| font_face->SetPropertyFromStyle(properties, |
| AtRuleDescriptorID::FontVariant) && |
| font_face->SetPropertyFromStyle( |
| properties, AtRuleDescriptorID::FontFeatureSettings) && |
| font_face->SetPropertyFromStyle(properties, |
| AtRuleDescriptorID::FontDisplay) && |
| font_face->GetFontSelectionCapabilities().IsValid() && |
| !font_face->family().IsEmpty()) { |
| font_face->InitCSSFontFace(document, *src); |
| return font_face; |
| } |
| return nullptr; |
| } |
| |
| FontFace::FontFace(ExecutionContext* context) |
| : ContextClient(context), status_(kUnloaded) {} |
| |
| FontFace::FontFace(ExecutionContext* context, |
| const AtomicString& family, |
| const FontFaceDescriptors* descriptors) |
| : ContextClient(context), family_(family), status_(kUnloaded) { |
| SetPropertyFromString(context, descriptors->style(), |
| AtRuleDescriptorID::FontStyle); |
| SetPropertyFromString(context, descriptors->weight(), |
| AtRuleDescriptorID::FontWeight); |
| SetPropertyFromString(context, descriptors->stretch(), |
| AtRuleDescriptorID::FontStretch); |
| SetPropertyFromString(context, descriptors->unicodeRange(), |
| AtRuleDescriptorID::UnicodeRange); |
| SetPropertyFromString(context, descriptors->variant(), |
| AtRuleDescriptorID::FontVariant); |
| SetPropertyFromString(context, descriptors->featureSettings(), |
| AtRuleDescriptorID::FontFeatureSettings); |
| SetPropertyFromString(context, descriptors->display(), |
| AtRuleDescriptorID::FontDisplay); |
| } |
| |
| FontFace::~FontFace() = default; |
| |
| String FontFace::style() const { |
| return style_ ? style_->CssText() : "normal"; |
| } |
| |
| String FontFace::weight() const { |
| return weight_ ? weight_->CssText() : "normal"; |
| } |
| |
| String FontFace::stretch() const { |
| return stretch_ ? stretch_->CssText() : "normal"; |
| } |
| |
| String FontFace::unicodeRange() const { |
| return unicode_range_ ? unicode_range_->CssText() : "U+0-10FFFF"; |
| } |
| |
| String FontFace::variant() const { |
| return variant_ ? variant_->CssText() : "normal"; |
| } |
| |
| String FontFace::featureSettings() const { |
| return feature_settings_ ? feature_settings_->CssText() : "normal"; |
| } |
| |
| String FontFace::display() const { |
| return display_ ? display_->CssText() : "auto"; |
| } |
| |
| void FontFace::setStyle(ExecutionContext* context, |
| const String& s, |
| ExceptionState& exception_state) { |
| SetPropertyFromString(context, s, AtRuleDescriptorID::FontStyle, |
| &exception_state); |
| } |
| |
| void FontFace::setWeight(ExecutionContext* context, |
| const String& s, |
| ExceptionState& exception_state) { |
| SetPropertyFromString(context, s, AtRuleDescriptorID::FontWeight, |
| &exception_state); |
| } |
| |
| void FontFace::setStretch(ExecutionContext* context, |
| const String& s, |
| ExceptionState& exception_state) { |
| SetPropertyFromString(context, s, AtRuleDescriptorID::FontStretch, |
| &exception_state); |
| } |
| |
| void FontFace::setUnicodeRange(ExecutionContext* context, |
| const String& s, |
| ExceptionState& exception_state) { |
| SetPropertyFromString(context, s, AtRuleDescriptorID::UnicodeRange, |
| &exception_state); |
| } |
| |
| void FontFace::setVariant(ExecutionContext* context, |
| const String& s, |
| ExceptionState& exception_state) { |
| SetPropertyFromString(context, s, AtRuleDescriptorID::FontVariant, |
| &exception_state); |
| } |
| |
| void FontFace::setFeatureSettings(ExecutionContext* context, |
| const String& s, |
| ExceptionState& exception_state) { |
| SetPropertyFromString(context, s, AtRuleDescriptorID::FontFeatureSettings, |
| &exception_state); |
| } |
| |
| void FontFace::setDisplay(ExecutionContext* context, |
| const String& s, |
| ExceptionState& exception_state) { |
| SetPropertyFromString(context, s, AtRuleDescriptorID::FontDisplay, |
| &exception_state); |
| } |
| |
| void FontFace::SetPropertyFromString(const ExecutionContext* context, |
| const String& s, |
| AtRuleDescriptorID descriptor_id, |
| ExceptionState* exception_state) { |
| const CSSValue* value = ParseCSSValue(context, s, descriptor_id); |
| if (value && SetPropertyValue(value, descriptor_id)) |
| return; |
| |
| String message = "Failed to set '" + s + "' as a property value."; |
| if (exception_state) |
| exception_state->ThrowDOMException(DOMExceptionCode::kSyntaxError, message); |
| else |
| SetError(DOMException::Create(DOMExceptionCode::kSyntaxError, message)); |
| } |
| |
| bool FontFace::SetPropertyFromStyle(const CSSPropertyValueSet& properties, |
| AtRuleDescriptorID property_id) { |
| return SetPropertyValue(properties.GetPropertyCSSValue(property_id), |
| property_id); |
| } |
| |
| bool FontFace::SetPropertyValue(const CSSValue* value, |
| AtRuleDescriptorID descriptor_id) { |
| switch (descriptor_id) { |
| case AtRuleDescriptorID::FontStyle: |
| style_ = value; |
| break; |
| case AtRuleDescriptorID::FontWeight: |
| weight_ = value; |
| break; |
| case AtRuleDescriptorID::FontStretch: |
| stretch_ = value; |
| break; |
| case AtRuleDescriptorID::UnicodeRange: |
| if (value && !value->IsValueList()) |
| return false; |
| unicode_range_ = value; |
| break; |
| case AtRuleDescriptorID::FontVariant: |
| variant_ = value; |
| break; |
| case AtRuleDescriptorID::FontFeatureSettings: |
| feature_settings_ = value; |
| break; |
| case AtRuleDescriptorID::FontDisplay: |
| display_ = value; |
| if (css_font_face_) |
| css_font_face_->SetDisplay(CSSValueToFontDisplay(display_.Get())); |
| break; |
| default: |
| NOTREACHED(); |
| return false; |
| } |
| return true; |
| } |
| |
| bool FontFace::SetFamilyValue(const CSSValue& family_value) { |
| AtomicString family; |
| if (family_value.IsFontFamilyValue()) { |
| family = AtomicString(ToCSSFontFamilyValue(family_value).Value()); |
| } else if (family_value.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(family_value).GetValueID()) { |
| case CSSValueSerif: |
| family = font_family_names::kWebkitSerif; |
| break; |
| case CSSValueSansSerif: |
| family = font_family_names::kWebkitSansSerif; |
| break; |
| case CSSValueCursive: |
| family = font_family_names::kWebkitCursive; |
| break; |
| case CSSValueFantasy: |
| family = font_family_names::kWebkitFantasy; |
| break; |
| case CSSValueMonospace: |
| family = font_family_names::kWebkitMonospace; |
| break; |
| case CSSValueWebkitPictograph: |
| family = font_family_names::kWebkitPictograph; |
| break; |
| default: |
| return false; |
| } |
| } |
| family_ = family; |
| return true; |
| } |
| |
| String FontFace::status() const { |
| switch (status_) { |
| case kUnloaded: |
| return "unloaded"; |
| case kLoading: |
| return "loading"; |
| case kLoaded: |
| return "loaded"; |
| case kError: |
| return "error"; |
| default: |
| NOTREACHED(); |
| } |
| return g_empty_string; |
| } |
| |
| void FontFace::SetLoadStatus(LoadStatusType status) { |
| status_ = status; |
| DCHECK(status_ != kError || error_); |
| |
| if (!GetExecutionContext()) |
| return; |
| |
| // 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 (status_ == kLoaded || status_ == kError) { |
| if (loaded_property_) { |
| if (status_ == kLoaded) { |
| GetExecutionContext() |
| ->GetTaskRunner(TaskType::kDOMManipulation) |
| ->PostTask(FROM_HERE, |
| WTF::Bind(&LoadedProperty::Resolve<FontFace*>, |
| WrapPersistent(loaded_property_.Get()), |
| WrapPersistent(this))); |
| } else |
| loaded_property_->Reject(error_.Get()); |
| } |
| |
| GetExecutionContext() |
| ->GetTaskRunner(TaskType::kDOMManipulation) |
| ->PostTask(FROM_HERE, |
| WTF::Bind(&FontFace::RunCallbacks, WrapPersistent(this))); |
| } |
| } |
| |
| void FontFace::RunCallbacks() { |
| HeapVector<Member<LoadFontCallback>> callbacks; |
| callbacks_.swap(callbacks); |
| for (wtf_size_t i = 0; i < callbacks.size(); ++i) { |
| if (status_ == kLoaded) |
| callbacks[i]->NotifyLoaded(this); |
| else |
| callbacks[i]->NotifyError(this); |
| } |
| } |
| |
| void FontFace::SetError(DOMException* error) { |
| if (!error_) { |
| error_ = |
| error ? error : DOMException::Create(DOMExceptionCode::kNetworkError); |
| } |
| SetLoadStatus(kError); |
| } |
| |
| ScriptPromise FontFace::FontStatusPromise(ScriptState* script_state) { |
| if (!loaded_property_) { |
| loaded_property_ = new LoadedProperty(ExecutionContext::From(script_state), |
| this, LoadedProperty::kLoaded); |
| if (status_ == kLoaded) |
| loaded_property_->Resolve(this); |
| else if (status_ == kError) |
| loaded_property_->Reject(error_.Get()); |
| } |
| return loaded_property_->Promise(script_state->World()); |
| } |
| |
| ScriptPromise FontFace::load(ScriptState* script_state) { |
| if (status_ == kUnloaded) |
| css_font_face_->Load(); |
| return FontStatusPromise(script_state); |
| } |
| |
| void FontFace::LoadWithCallback(LoadFontCallback* callback) { |
| if (status_ == kUnloaded) |
| css_font_face_->Load(); |
| AddCallback(callback); |
| } |
| |
| void FontFace::AddCallback(LoadFontCallback* callback) { |
| if (status_ == kLoaded) |
| callback->NotifyLoaded(this); |
| else if (status_ == kError) |
| callback->NotifyError(this); |
| else |
| callbacks_.push_back(callback); |
| } |
| |
| FontSelectionCapabilities FontFace::GetFontSelectionCapabilities() const { |
| // FontSelectionCapabilities represents a range of available width, slope and |
| // weight values. The first value of each pair is the minimum value, the |
| // second is the maximum value. |
| FontSelectionCapabilities normal_capabilities( |
| {NormalWidthValue(), NormalWidthValue()}, |
| {NormalSlopeValue(), NormalSlopeValue()}, |
| {NormalWeightValue(), NormalWeightValue()}); |
| FontSelectionCapabilities capabilities(normal_capabilities); |
| |
| if (stretch_) { |
| if (stretch_->IsIdentifierValue()) { |
| switch (ToCSSIdentifierValue(stretch_.Get())->GetValueID()) { |
| case CSSValueUltraCondensed: |
| capabilities.width = {UltraCondensedWidthValue(), |
| UltraCondensedWidthValue()}; |
| break; |
| case CSSValueExtraCondensed: |
| capabilities.width = {ExtraCondensedWidthValue(), |
| ExtraCondensedWidthValue()}; |
| break; |
| case CSSValueCondensed: |
| capabilities.width = {CondensedWidthValue(), CondensedWidthValue()}; |
| break; |
| case CSSValueSemiCondensed: |
| capabilities.width = {SemiCondensedWidthValue(), |
| SemiCondensedWidthValue()}; |
| break; |
| case CSSValueSemiExpanded: |
| capabilities.width = {SemiExpandedWidthValue(), |
| SemiExpandedWidthValue()}; |
| break; |
| case CSSValueExpanded: |
| capabilities.width = {ExpandedWidthValue(), ExpandedWidthValue()}; |
| break; |
| case CSSValueExtraExpanded: |
| capabilities.width = {ExtraExpandedWidthValue(), |
| ExtraExpandedWidthValue()}; |
| break; |
| case CSSValueUltraExpanded: |
| capabilities.width = {UltraExpandedWidthValue(), |
| UltraExpandedWidthValue()}; |
| break; |
| default: |
| break; |
| } |
| } else if (stretch_->IsValueList()) { |
| // Transition FontFace interpretation of parsed values from |
| // CSSIdentifierValue to CSSValueList or CSSPrimitiveValue. |
| // TODO(drott) crbug.com/739139: Update the parser to only produce |
| // CSSPrimitiveValue or CSSValueList. |
| const CSSValueList* stretch_list = ToCSSValueList(stretch_); |
| if (stretch_list->length() != 2) |
| return normal_capabilities; |
| if (!stretch_list->Item(0).IsPrimitiveValue() || |
| !stretch_list->Item(1).IsPrimitiveValue()) |
| return normal_capabilities; |
| const CSSPrimitiveValue* stretch_from = |
| ToCSSPrimitiveValue(&stretch_list->Item(0)); |
| const CSSPrimitiveValue* stretch_to = |
| ToCSSPrimitiveValue(&stretch_list->Item(1)); |
| if (!stretch_from->IsPercentage() || !stretch_to->IsPercentage()) |
| return normal_capabilities; |
| capabilities.width = {FontSelectionValue(stretch_from->GetFloatValue()), |
| FontSelectionValue(stretch_to->GetFloatValue())}; |
| } else if (stretch_->IsPrimitiveValue()) { |
| float stretch_value = |
| ToCSSPrimitiveValue(stretch_.Get())->GetFloatValue(); |
| capabilities.width = {FontSelectionValue(stretch_value), |
| FontSelectionValue(stretch_value)}; |
| } else { |
| NOTREACHED(); |
| return normal_capabilities; |
| } |
| } |
| |
| if (style_) { |
| if (style_->IsIdentifierValue()) { |
| switch (ToCSSIdentifierValue(style_.Get())->GetValueID()) { |
| case CSSValueNormal: |
| capabilities.slope = {NormalSlopeValue(), NormalSlopeValue()}; |
| break; |
| case CSSValueOblique: |
| capabilities.slope = {ItalicSlopeValue(), ItalicSlopeValue()}; |
| break; |
| case CSSValueItalic: |
| capabilities.slope = {ItalicSlopeValue(), ItalicSlopeValue()}; |
| break; |
| default: |
| break; |
| } |
| } else if (style_->IsFontStyleRangeValue()) { |
| const cssvalue::CSSFontStyleRangeValue* range_value = |
| cssvalue::ToCSSFontStyleRangeValue(style_); |
| if (range_value->GetFontStyleValue()->IsIdentifierValue()) { |
| CSSValueID font_style_id = |
| range_value->GetFontStyleValue()->GetValueID(); |
| if (!range_value->GetObliqueValues()) { |
| if (font_style_id == CSSValueNormal) |
| capabilities.slope = {NormalSlopeValue(), NormalSlopeValue()}; |
| DCHECK(font_style_id == CSSValueItalic || |
| font_style_id == CSSValueOblique); |
| capabilities.slope = {ItalicSlopeValue(), ItalicSlopeValue()}; |
| } else { |
| DCHECK(font_style_id == CSSValueOblique); |
| size_t oblique_values_size = |
| range_value->GetObliqueValues()->length(); |
| if (oblique_values_size == 1) { |
| const CSSPrimitiveValue& range_start = |
| ToCSSPrimitiveValue(range_value->GetObliqueValues()->Item(0)); |
| FontSelectionValue oblique_range(range_start.GetFloatValue()); |
| capabilities.slope = {oblique_range, oblique_range}; |
| } else { |
| DCHECK_EQ(oblique_values_size, 2u); |
| const CSSPrimitiveValue& range_start = |
| ToCSSPrimitiveValue(range_value->GetObliqueValues()->Item(0)); |
| const CSSPrimitiveValue& range_end = |
| ToCSSPrimitiveValue(range_value->GetObliqueValues()->Item(1)); |
| capabilities.slope = { |
| FontSelectionValue(range_start.GetFloatValue()), |
| FontSelectionValue(range_end.GetFloatValue())}; |
| } |
| } |
| } |
| } else { |
| NOTREACHED(); |
| return normal_capabilities; |
| } |
| } |
| |
| if (weight_) { |
| if (weight_->IsIdentifierValue()) { |
| switch (ToCSSIdentifierValue(weight_.Get())->GetValueID()) { |
| // 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; |
| case CSSValueNormal: |
| capabilities.weight = {NormalWeightValue(), NormalWeightValue()}; |
| break; |
| case CSSValueBold: |
| capabilities.weight = {BoldWeightValue(), BoldWeightValue()}; |
| break; |
| default: |
| NOTREACHED(); |
| break; |
| } |
| } else if (weight_->IsValueList()) { |
| const CSSValueList* weight_list = ToCSSValueList(weight_); |
| if (weight_list->length() != 2) |
| return normal_capabilities; |
| if (!weight_list->Item(0).IsPrimitiveValue() || |
| !weight_list->Item(1).IsPrimitiveValue()) |
| return normal_capabilities; |
| const CSSPrimitiveValue* weight_from = |
| ToCSSPrimitiveValue(&weight_list->Item(0)); |
| const CSSPrimitiveValue* weight_to = |
| ToCSSPrimitiveValue(&weight_list->Item(1)); |
| if (!weight_from->IsNumber() || !weight_to->IsNumber() || |
| weight_from->GetFloatValue() < 1 || weight_to->GetFloatValue() > 1000) |
| return normal_capabilities; |
| capabilities.weight = {FontSelectionValue(weight_from->GetFloatValue()), |
| FontSelectionValue(weight_to->GetFloatValue())}; |
| } else if (weight_->IsPrimitiveValue()) { |
| float weight_value = ToCSSPrimitiveValue(weight_.Get())->GetFloatValue(); |
| if (weight_value < 1 || weight_value > 1000) |
| return normal_capabilities; |
| capabilities.weight = {FontSelectionValue(weight_value), |
| FontSelectionValue(weight_value)}; |
| } else { |
| NOTREACHED(); |
| return normal_capabilities; |
| } |
| } |
| |
| return capabilities; |
| } |
| |
| size_t FontFace::ApproximateBlankCharacterCount() const { |
| if (status_ == kLoading) |
| return css_font_face_->ApproximateBlankCharacterCount(); |
| return 0; |
| } |
| |
| bool ContextAllowsDownload(ExecutionContext* context) { |
| if (!context) { |
| return false; |
| } |
| if (const Document* document = DynamicTo<Document>(context)) { |
| const Settings* settings = document->GetSettings(); |
| return settings && settings->GetDownloadableBinaryFontsEnabled(); |
| } |
| // TODO(fserb): ideally, we would like to have the settings value available |
| // on workers. Right now, we don't support that. |
| return true; |
| } |
| |
| void FontFace::InitCSSFontFace(ExecutionContext* context, const CSSValue& src) { |
| css_font_face_ = CreateCSSFontFace(this, unicode_range_.Get()); |
| if (error_) |
| return; |
| |
| // Each item in the src property's list is a single CSSFontFaceSource. Put |
| // them all into a CSSFontFace. |
| DCHECK(src.IsValueList()); |
| const CSSValueList& src_list = ToCSSValueList(src); |
| int src_length = src_list.length(); |
| |
| for (int i = 0; i < src_length; i++) { |
| // An item in the list either specifies a string (local font name) or a URL |
| // (remote font to download). |
| const CSSFontFaceSrcValue& item = ToCSSFontFaceSrcValue(src_list.Item(i)); |
| |
| if (!item.IsLocal()) { |
| if (ContextAllowsDownload(context) && item.IsSupportedFormat()) { |
| FontSelector* font_selector = nullptr; |
| if (auto* document = DynamicTo<Document>(context)) { |
| font_selector = document->GetStyleEngine().GetFontSelector(); |
| } else if (auto* scope = DynamicTo<WorkerGlobalScope>(context)) { |
| font_selector = scope->GetFontSelector(); |
| } else { |
| NOTREACHED(); |
| } |
| RemoteFontFaceSource* source = |
| new RemoteFontFaceSource(css_font_face_, font_selector, |
| CSSValueToFontDisplay(display_.Get())); |
| item.Fetch(context, source); |
| css_font_face_->AddSource(source); |
| } |
| } else { |
| css_font_face_->AddSource(new LocalFontFaceSource(item.GetResource())); |
| } |
| } |
| |
| if (display_) { |
| DEFINE_THREAD_SAFE_STATIC_LOCAL( |
| EnumerationHistogram, font_display_histogram, |
| ("WebFont.FontDisplayValue", kFontDisplayEnumMax)); |
| font_display_histogram.Count(CSSValueToFontDisplay(display_.Get())); |
| } |
| } |
| |
| void FontFace::InitCSSFontFace(const unsigned char* data, size_t size) { |
| css_font_face_ = CreateCSSFontFace(this, unicode_range_.Get()); |
| if (error_) |
| return; |
| |
| scoped_refptr<SharedBuffer> buffer = SharedBuffer::Create(data, size); |
| BinaryDataFontFaceSource* source = |
| new BinaryDataFontFaceSource(buffer.get(), ots_parse_message_); |
| if (source->IsValid()) |
| SetLoadStatus(kLoaded); |
| else |
| SetError(DOMException::Create(DOMExceptionCode::kSyntaxError, |
| "Invalid font data in ArrayBuffer.")); |
| css_font_face_->AddSource(source); |
| } |
| |
| void FontFace::Trace(blink::Visitor* visitor) { |
| visitor->Trace(style_); |
| visitor->Trace(weight_); |
| visitor->Trace(stretch_); |
| visitor->Trace(unicode_range_); |
| visitor->Trace(variant_); |
| visitor->Trace(feature_settings_); |
| visitor->Trace(display_); |
| visitor->Trace(error_); |
| visitor->Trace(loaded_property_); |
| visitor->Trace(css_font_face_); |
| visitor->Trace(callbacks_); |
| ScriptWrappable::Trace(visitor); |
| ContextClient::Trace(visitor); |
| } |
| |
| bool FontFace::HadBlankText() const { |
| return css_font_face_->HadBlankText(); |
| } |
| |
| bool FontFace::HasPendingActivity() const { |
| return status_ == kLoading && GetExecutionContext(); |
| } |
| |
| } // namespace blink |
