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// 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_COMPUTED_STYLE_DECLARATION_H_
#define COBALT_CSSOM_CSS_COMPUTED_STYLE_DECLARATION_H_
#include <string>
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "base/optional.h"
#include "cobalt/cssom/css_computed_style_data.h"
#include "cobalt/cssom/css_style_declaration.h"
#include "cobalt/script/exception_state.h"
#include "cobalt/web_animations/animation_set.h"
namespace cobalt {
namespace cssom {
// A CSS declaration block is an ordered collection of CSS properties with their
// associated values, also named CSS declarations. In the DOM a CSS declaration
// block is a CSSStyleDeclaration object.
// https://www.w3.org/TR/2013/WD-cssom-20131205/#css-declaration-blocks
// The CSSComputedStyleDeclaration implements a CSS Declaration block
// for computed styles.
class CSSComputedStyleDeclaration : public CSSStyleDeclaration {
public:
using CSSStyleDeclaration::SetProperty;
CSSComputedStyleDeclaration() {}
// From CSSStyleDeclaration.
std::string css_text(script::ExceptionState* exception_state) const override;
void set_css_text(const std::string& css_text,
script::ExceptionState* exception_state) override;
unsigned int length() const override;
base::optional<std::string> Item(unsigned int index) const override;
void SetPropertyValue(const std::string& property_name,
const std::string& property_value,
script::ExceptionState* exception_state) override;
void SetProperty(const std::string& property_name,
const std::string& property_value,
const std::string& priority,
script::ExceptionState* exception_state) override;
// Custom.
const scoped_refptr<const CSSComputedStyleData>& data() const {
return data_;
}
void SetData(const scoped_refptr<const CSSComputedStyleData>& data);
// Updates the pointer to the nearest CSSComputedStyleData ancestor,
// inclusive, which has inherited properties declared.
void UpdateInheritedData();
// Returns whether or not this object or any ancestors have inherited
// properties declared.
bool HasInheritedProperties() const {
return data_with_inherited_properties_ != NULL;
}
// Returns the reference to the property value for an inherited property.
// Should only be called if HasInheritedProperties() returns true.
const scoped_refptr<PropertyValue>& GetInheritedPropertyValueReference(
PropertyKey key) const;
const scoped_refptr<const web_animations::AnimationSet>& animations() const {
return animations_;
}
void set_animations(
const scoped_refptr<const web_animations::AnimationSet>& animations) {
animations_ = animations;
}
private:
// From CSSStyleDeclaration.
std::string GetDeclaredPropertyValueStringByKey(
const PropertyKey key) const override;
// The CSSComputedStyleData owned by this object.
scoped_refptr<const CSSComputedStyleData> data_;
// The nearest CSSComputedStyleData ancestor, inclusive, which has inherited
// properties declared.
scoped_refptr<const CSSComputedStyleData> data_with_inherited_properties_;
// All animation that applies to the above computed style.
scoped_refptr<const web_animations::AnimationSet> animations_;
DISALLOW_COPY_AND_ASSIGN(CSSComputedStyleDeclaration);
};
} // namespace cssom
} // namespace cobalt
#endif // COBALT_CSSOM_CSS_COMPUTED_STYLE_DECLARATION_H_