| // Copyright 2016 The Cobalt Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "cobalt/cssom/css_computed_style_declaration.h" |
| |
| #include "cobalt/cssom/css_declared_style_data.h" |
| #include "cobalt/dom/dom_exception.h" |
| |
| namespace cobalt { |
| namespace cssom { |
| // This returns the result of serializing a CSS declaration block. |
| // https://www.w3.org/TR/cssom/#serialize-a-css-declaration-block |
| std::string CSSComputedStyleDeclaration::css_text( |
| script::ExceptionState* exception_state) const { |
| // The current implementation does not handle shorthands. |
| NOTIMPLEMENTED(); |
| return data_ ? data_->SerializeCSSDeclarationBlock() : std::string(); |
| } |
| |
| void CSSComputedStyleDeclaration::set_css_text( |
| const std::string& css_text, script::ExceptionState* exception_state) { |
| dom::DOMException::Raise(dom::DOMException::kInvalidAccessErr, |
| exception_state); |
| } |
| |
| // The length attribute must return the number of CSS declarations in the |
| // declarations. |
| // https://www.w3.org/TR/cssom/#dom-cssstyledeclaration-length |
| unsigned int CSSComputedStyleDeclaration::length() const { |
| // Computed style declarations have all known longhand properties. |
| return kMaxLonghandPropertyKey + 1; |
| } |
| |
| // The item(index) method must return the property name of the CSS declaration |
| // at position index. |
| // https://www.w3.org/TR/cssom/#dom-cssstyledeclaration-item |
| base::Optional<std::string> CSSComputedStyleDeclaration::Item( |
| unsigned int index) const { |
| if (index >= length()) return base::nullopt; |
| return base::Optional<std::string>( |
| GetPropertyName(GetLexicographicalLonghandPropertyKey(index))); |
| } |
| |
| std::string CSSComputedStyleDeclaration::GetDeclaredPropertyValueStringByKey( |
| const PropertyKey key) const { |
| if (!data_ || key == kNoneProperty) { |
| return std::string(); |
| } |
| if (key > kMaxLonghandPropertyKey) { |
| // Shorthand properties are never directly stored as computed style |
| // properties. |
| // TODO: Implement serialization of css values, see |
| // https://www.w3.org/TR/cssom-1/#serializing-css-values |
| DCHECK_LE(key, kMaxEveryPropertyKey); |
| NOTIMPLEMENTED(); |
| DLOG(WARNING) << "Unsupported property query for \"" << GetPropertyName(key) |
| << "\": Returning of property value strings is not " |
| "supported for shorthand properties."; |
| return std::string(); |
| } |
| const scoped_refptr<PropertyValue>& property_value = |
| data_->GetPropertyValueReference(key); |
| DCHECK(property_value); |
| return property_value->ToString(); |
| } |
| |
| void CSSComputedStyleDeclaration::SetPropertyValue( |
| const std::string& property_name, const std::string& property_value, |
| script::ExceptionState* exception_state) { |
| dom::DOMException::Raise(dom::DOMException::kInvalidAccessErr, |
| exception_state); |
| } |
| |
| void CSSComputedStyleDeclaration::SetProperty( |
| const std::string& property_name, const std::string& property_value, |
| const std::string& priority, script::ExceptionState* exception_state) { |
| dom::DOMException::Raise(dom::DOMException::kInvalidAccessErr, |
| exception_state); |
| } |
| |
| void CSSComputedStyleDeclaration::SetData( |
| const scoped_refptr<const CSSComputedStyleData>& data) { |
| data_ = data; |
| // After setting |data_|, |data_with_inherited_properties_| needs to be |
| // updated. It may have changed. |
| UpdateInheritedData(); |
| } |
| |
| void CSSComputedStyleDeclaration::UpdateInheritedData() { |
| if (!data_) { |
| // If there's no data, then there can be no data with inherited properties. |
| data_with_inherited_properties_ = NULL; |
| } else if (data_->has_declared_inherited_properties()) { |
| // Otherwise, if the data has inherited properties, then it's also the first |
| // data with inherited properties. |
| data_with_inherited_properties_ = data_; |
| } else { |
| // Otherwise, |data_with_inherited_properties_| should be set to the parent |
| // computed style's |data_with_inherited_properties_|. This is because the |
| // updates always cascade down the tree and the parent is guaranteed to |
| // have already been updated when the child is updated. |
| const scoped_refptr<CSSComputedStyleDeclaration>& |
| parent_computed_style_declaration = |
| data_->GetParentComputedStyleDeclaration(); |
| if (parent_computed_style_declaration) { |
| data_with_inherited_properties_ = |
| parent_computed_style_declaration->data_with_inherited_properties_; |
| } else { |
| data_with_inherited_properties_ = NULL; |
| } |
| } |
| } |
| |
| const scoped_refptr<PropertyValue>& |
| CSSComputedStyleDeclaration::GetInheritedPropertyValueReference( |
| PropertyKey key) const { |
| DCHECK(data_with_inherited_properties_); |
| return data_with_inherited_properties_->GetPropertyValueReference(key); |
| } |
| |
| } // namespace cssom |
| } // namespace cobalt |