/* -*- 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/. */

#ifndef mozilla_dom_HTMLMeterElement_h

#define mozilla_dom_HTMLMeterElement_h

#include "mozilla/Attributes.h"

#include "nsGenericHTMLElement.h"

#include "nsAttrValue.h"

#include "nsAttrValueInlines.h"

#include "nsAlgorithm.h"

#include <algorithm>

namespace mozilla {

namespace dom {

class HTMLMeterElement final : public nsGenericHTMLElement

{

public:

  explicit HTMLMeterElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);

  virtual EventStates IntrinsicState() const override;

  nsresult Clone(dom::NodeInfo*, nsINode** aResult) const override;

  virtual bool ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,

                              const nsAString& aValue,

                              nsIPrincipal* aMaybeScriptedPrincipal,

                              nsAttrValue& aResult) override;

  // WebIDL

  /* @return the value */

  double Value() const;

  void SetValue(double aValue, ErrorResult& aRv)

  {

    SetDoubleAttr(nsGkAtoms::value, aValue, aRv);

  }

  /* @return the minimum value */

  double Min() const;

  void SetMin(double aValue, ErrorResult& aRv)

  {

    SetDoubleAttr(nsGkAtoms::min, aValue, aRv);

  }

  /* @return the maximum value */

  double Max() const;

  void SetMax(double aValue, ErrorResult& aRv)

  {

    SetDoubleAttr(nsGkAtoms::max, aValue, aRv);

  }

  /* @return the low value */

  double Low() const;

  void SetLow(double aValue, ErrorResult& aRv)

  {

    SetDoubleAttr(nsGkAtoms::low, aValue, aRv);

  }

  /* @return the high value */

  double High() const;

  void SetHigh(double aValue, ErrorResult& aRv)

  {

    SetDoubleAttr(nsGkAtoms::high, aValue, aRv);

  }

  /* @return the optimum value */

  double Optimum() const;

  void SetOptimum(double aValue, ErrorResult& aRv)

  {

    SetDoubleAttr(nsGkAtoms::optimum, aValue, aRv);

  }

protected:

  virtual ~HTMLMeterElement();

  virtual JSObject* WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;

private:

  static const double kDefaultValue;

  static const double kDefaultMin;

  static const double kDefaultMax;

  /**

   * Returns the optimum state of the element.

   * NS_EVENT_STATE_OPTIMUM if the actual value is in the optimum region.

   * NS_EVENT_STATE_SUB_OPTIMUM if the actual value is in the sub-optimal region.

   * NS_EVENT_STATE_SUB_SUB_OPTIMUM if the actual value is in the sub-sub-optimal region.

   *

   * @return the optimum state of the element.

   */

  EventStates GetOptimumState() const;

};

} // namespace dom

} // namespace mozilla

#endif // mozilla_dom_HTMLMeterElement_h