src/cobalt/cssom/css_declaration_data.h

// Copyright 2015 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_DECLARATION_DATA_H_
#define COBALT_CSSOM_CSS_DECLARATION_DATA_H_

#include "base/memory/ref_counted.h"
#include "cobalt/cssom/property_definitions.h"
#include "cobalt/cssom/property_value.h"

namespace cobalt {
namespace cssom {

// CSSDeclarationData which has PropertyValue type properties only used
// internally and it is not exposed to JavaScript.  It derives from
// RefCountedThreadSafe instead of RefCounted so that it can be passed forward
// to another thread for animating before rendering a scene.
class CSSDeclarationData
    : public base::RefCountedThreadSafe<CSSDeclarationData> {
 public:
  virtual bool IsSupportedPropertyKey(PropertyKey key) const = 0;
  virtual scoped_refptr<PropertyValue> GetPropertyValue(
      PropertyKey key) const = 0;
  virtual void ClearPropertyValueAndImportance(PropertyKey key) = 0;
  virtual void SetPropertyValueAndImportance(
      PropertyKey key, const scoped_refptr<PropertyValue>& property_value,
      bool important) = 0;

 protected:
  virtual ~CSSDeclarationData() {}

 private:
  friend class base::RefCountedThreadSafe<CSSDeclarationData>;
};

}  // namespace cssom
}  // namespace cobalt

#endif  // COBALT_CSSOM_CSS_DECLARATION_DATA_H_