/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* 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/. */

/* DOM object representing values in DOM computed style */

#ifndef mozilla_dom_CSSValue_h_

#define mozilla_dom_CSSValue_h_

#include "nsStringFwd.h"

#include "mozilla/RefCounted.h"

class nsROCSSPrimitiveValue;

namespace mozilla {

class ErrorResult;

} // namespace mozilla

namespace mozilla {

namespace dom {

/**

 * CSSValue - a DOM object representing values in DOM computed style.

 */

class CSSValue : public RefCounted<CSSValue>

{

public:

  MOZ_DECLARE_REFCOUNTED_TYPENAME(CSSValue);

  enum : uint16_t {

    CSS_INHERIT,

    CSS_PRIMITIVE_VALUE,

    CSS_VALUE_LIST,

    CSS_CUSTOM,

  };

  // CSSValue

  virtual void GetCssText(nsString& aText, mozilla::ErrorResult& aRv) = 0;

  virtual void SetCssText(const nsAString& aText, mozilla::ErrorResult& aRv) = 0;

  virtual uint16_t CssValueType() const = 0;

  virtual ~CSSValue() { };

  // Downcasting

  /**

   * Return this as a nsROCSSPrimitiveValue* if its a primitive value, and null

   * otherwise.

   *

   * Defined in nsROCSSPrimitiveValue.h.

   */

  inline nsROCSSPrimitiveValue* AsPrimitiveValue();

};

} // namespace dom

} // namespace mozilla

#endif