/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef LAYOUT_STYLE_TYPEDOM_CSSUNSUPPORTEDVALUE_H_
#define LAYOUT_STYLE_TYPEDOM_CSSUNSUPPORTEDVALUE_H_

#include "mozilla/RefPtr.h"
#include "mozilla/dom/CSSStyleValue.h"
#include "nsString.h"

template <class T>
class nsCOMPtr;
class nsISupports;

namespace mozilla {

class DeclarationBlock;

namespace dom {

// https://drafts.css-houdini.org/css-typed-om/#reify-failure
//
// Represents a property value that cannot be reified into any of the
// supported CSSStyleValue subclasses. Per the spec, such values are still
// exposed as CSSStyleValue objects tied to their originating property,
// but they cannot be transferred to other properties.
class CSSUnsupportedValue final : public CSSStyleValue {
 public:
  CSSUnsupportedValue(nsCOMPtr<nsISupports> aParent,
                      const nsACString& aProperty,
                      RefPtr<DeclarationBlock> aDeclarations);

  void GetValue(nsACString& aRetVal) const;

 private:
  virtual ~CSSUnsupportedValue() = default;

  nsCString mProperty;
  RefPtr<DeclarationBlock> mDeclarations;
};

}  // namespace dom
}  // namespace mozilla

#endif  // LAYOUT_STYLE_TYPEDOM_CSSUNSUPPORTEDVALUE_H_