/* -*- 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_HTMLOptionElement_h__

#define mozilla_dom_HTMLOptionElement_h__

#include "mozilla/Attributes.h"

#include "nsGenericHTMLElement.h"

#include "mozilla/dom/HTMLFormElement.h"

namespace mozilla {

namespace dom {

class HTMLSelectElement;

class HTMLOptionElement final : public nsGenericHTMLElement

{

public:

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

  static already_AddRefed<HTMLOptionElement>

    Option(const GlobalObject& aGlobal,

           const nsAString& aText,

           const Optional<nsAString>& aValue,

           bool aDefaultSelected,

           bool aSelected,

           ErrorResult& aError);

  NS_IMPL_FROMNODE_HTML_WITH_TAG(HTMLOptionElement, option)

  // nsISupports

  NS_INLINE_DECL_REFCOUNTING_INHERITED(HTMLOptionElement, nsGenericHTMLElement)

  using mozilla::dom::Element::GetText;

  bool Selected() const

  {

    return mIsSelected;

  }

  void SetSelected(bool aValue);

  void SetSelectedChanged(bool aValue)

  {

    mSelectedChanged = aValue;

  }

  virtual nsChangeHint GetAttributeChangeHint(const nsAtom* aAttribute,

                                              int32_t aModType) const override;

  virtual nsresult BeforeSetAttr(int32_t aNamespaceID, nsAtom* aName,

                                 const nsAttrValueOrString* aValue,

                                 bool aNotify) override;

  virtual nsresult AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,

                                const nsAttrValue* aValue,

                                const nsAttrValue* aOldValue,

                                nsIPrincipal* aSubjectPrincipal,

                                bool aNotify) override;

  void SetSelectedInternal(bool aValue, bool aNotify);

  /**

   * This callback is called by an optgroup on all its option elements whenever

   * its disabled state is changed so that option elements can know their

   * disabled state might have changed.

   */

  void OptGroupDisabledChanged(bool aNotify);

  /**

   * Check our disabled content attribute and optgroup's (if it exists) disabled

   * state to decide whether our disabled flag should be toggled.

   */

  void UpdateDisabledState(bool aNotify);

  virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,

                              nsIContent* aBindingParent) override;

  virtual void UnbindFromTree(bool aDeep = true,

                              bool aNullParent = true) override;

  // nsIContent

  virtual EventStates IntrinsicState() const override;

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

  nsresult CopyInnerTo(mozilla::dom::Element* aDest);

  bool Disabled() const

  {

    return GetBoolAttr(nsGkAtoms::disabled);

  }

  void SetDisabled(bool aValue, ErrorResult& aRv)

  {

    SetHTMLBoolAttr(nsGkAtoms::disabled, aValue, aRv);

  }

  HTMLFormElement* GetForm();

  void GetLabel(DOMString& aLabel)

  {

    if (!GetAttr(kNameSpaceID_None, nsGkAtoms::label, aLabel)) {

      GetText(aLabel);

    }

  }

  void SetLabel(const nsAString& aLabel, ErrorResult& aError)

  {

    SetHTMLAttr(nsGkAtoms::label, aLabel, aError);

  }

  bool DefaultSelected() const

  {

    return HasAttr(kNameSpaceID_None, nsGkAtoms::selected);

  }

  void SetDefaultSelected(bool aValue, ErrorResult& aRv)

  {

    SetHTMLBoolAttr(nsGkAtoms::selected, aValue, aRv);

  }

  void GetValue(nsAString& aValue)

  {

    if (!GetAttr(kNameSpaceID_None, nsGkAtoms::value, aValue)) {

      GetText(aValue);

    }

  }

  void SetValue(const nsAString& aValue, ErrorResult& aRv)

  {

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

  }

  void GetText(nsAString& aText);

  void SetText(const nsAString& aText, ErrorResult& aRv);

  int32_t Index();

protected:

  virtual ~HTMLOptionElement();

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

  /**

   * Get the select content element that contains this option, this

   * intentionally does not return nsresult, all we care about is if

   * there's a select associated with this option or not.

   */

  HTMLSelectElement* GetSelect();

  bool mSelectedChanged;

  bool mIsSelected;

  // True only while we're under the SetOptionsSelectedByIndex call when our

  // "selected" attribute is changing and mSelectedChanged is false.

  bool mIsInSetDefaultSelected;

};

} // namespace dom

} // namespace mozilla

#endif // mozilla_dom_HTMLOptionElement_h__