| /* |
| * Copyright 2016 Google Inc. 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. |
| */ |
| |
| #ifndef COBALT_CSSOM_CSS_DECLARED_STYLE_DATA_H_ |
| #define COBALT_CSSOM_CSS_DECLARED_STYLE_DATA_H_ |
| |
| #include <bitset> |
| #include <functional> |
| #include <string> |
| |
| #include "base/compiler_specific.h" |
| #include "base/hash_tables.h" |
| #include "base/memory/ref_counted.h" |
| #include "cobalt/base/unused.h" |
| #include "cobalt/cssom/css_declaration_data.h" |
| #include "cobalt/cssom/property_definitions.h" |
| #include "cobalt/cssom/property_value.h" |
| |
| namespace cobalt { |
| namespace cssom { |
| |
| // CSSDeclaredStyleData which has PropertyValue type properties only used |
| // internally and it is not exposed to JavaScript. |
| class CSSDeclaredStyleData : public CSSDeclarationData { |
| public: |
| CSSDeclaredStyleData(); |
| |
| typedef base::hash_map<PropertyKey, scoped_refptr<PropertyValue> > |
| PropertyValues; |
| |
| // The length attribute must return the number of CSS declarations in the |
| // declarations. |
| // https://www.w3.org/TR/cssom/#dom-cssstyledeclaration-length |
| unsigned int length() const; |
| |
| // 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 |
| const char* Item(unsigned int index) const; |
| |
| // From CSSDeclarationData |
| // |
| bool IsSupportedPropertyKey(PropertyKey key) const OVERRIDE; |
| |
| scoped_refptr<PropertyValue> GetPropertyValue(PropertyKey key) const OVERRIDE; |
| |
| void SetPropertyValueAndImportance( |
| PropertyKey key, const scoped_refptr<PropertyValue>& property_value, |
| bool important) OVERRIDE; |
| |
| // Sets the specified property value to NULL and importance to false. This |
| // may be called on longhand properties as well as shorthand properties. |
| void ClearPropertyValueAndImportance(PropertyKey key) OVERRIDE; |
| |
| // Rest of public methods. |
| |
| // Returns true if the property is explicitly declared in this style, as |
| // opposed to implicitly inheriting from its parent or the initial value. |
| bool IsDeclared(const PropertyKey key) const { |
| return declared_properties_[key]; |
| } |
| |
| // This returns the value of the given property if that value is declared, or |
| // an empty string if the property does not have a declared value. |
| // Declarations in linked ancestor styles will not be considered. |
| std::string GetPropertyValueString(const PropertyKey key) const; |
| |
| void AssignFrom(const CSSDeclaredStyleData& rhs); |
| |
| bool IsAnyDeclaredPropertyImportant() const { |
| return important_properties_.any(); |
| } |
| |
| bool IsDeclaredPropertyImportant(PropertyKey key) const { |
| return important_properties_[key]; |
| } |
| |
| // This returns the result of serializing a CSS declaration block. |
| // The current implementation does not handle shorthands. |
| // https://www.w3.org/TR/cssom/#serialize-a-css-declaration-block |
| std::string SerializeCSSDeclarationBlock() const; |
| |
| bool operator==(const CSSDeclaredStyleData& that) const; |
| |
| const PropertyValues& declared_property_values() const { |
| return declared_property_values_; |
| } |
| |
| private: |
| // Helper function that can be called by ClearPropertyValueAndImportance(). |
| void ClearPropertyValueAndImportanceForLonghandProperty(PropertyKey key); |
| |
| PropertyValues::const_iterator Find(PropertyKey key) const; |
| PropertyValues::iterator Find(PropertyKey key); |
| |
| LonghandPropertiesBitset declared_properties_; |
| PropertyValues declared_property_values_; |
| LonghandPropertiesBitset important_properties_; |
| }; |
| |
| } // namespace cssom |
| } // namespace cobalt |
| |
| #endif // COBALT_CSSOM_CSS_DECLARED_STYLE_DATA_H_ |