/* -*- 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/. */

#include "mozilla/dom/HTMLOutputElement.h"

#include "mozAutoDocUpdate.h"

#include "mozilla/EventStates.h"

#include "mozilla/dom/HTMLFormElement.h"

#include "mozilla/dom/HTMLFormSubmission.h"

#include "mozilla/dom/HTMLOutputElementBinding.h"

#include "nsContentUtils.h"

#include "nsDOMTokenList.h"

NS_IMPL_NS_NEW_HTML_ELEMENT_CHECK_PARSER(Output)

namespace mozilla {

namespace dom {

HTMLOutputElement::HTMLOutputElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,

                                     FromParser aFromParser)

  : nsGenericHTMLFormElement(std::move(aNodeInfo), NS_FORM_OUTPUT)

  , mValueModeFlag(eModeDefault)

  , mIsDoneAddingChildren(!aFromParser)

{

  AddMutationObserver(this);

  // We start out valid and ui-valid (since we have no form).

  AddStatesSilently(NS_EVENT_STATE_VALID | NS_EVENT_STATE_MOZ_UI_VALID);

}

HTMLOutputElement::~HTMLOutputElement()

{

}

NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLOutputElement,

                                   nsGenericHTMLFormElement,

                                   mValidity,

                                   mTokenList)

NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(HTMLOutputElement,

                                             nsGenericHTMLFormElement,

                                             nsIMutationObserver,

                                             nsIConstraintValidation)

NS_IMPL_ELEMENT_CLONE(HTMLOutputElement)

void

HTMLOutputElement::SetCustomValidity(const nsAString& aError)

{

  nsIConstraintValidation::SetCustomValidity(aError);

  UpdateState(true);

}

NS_IMETHODIMP

HTMLOutputElement::Reset()

{

  mValueModeFlag = eModeDefault;

  return nsContentUtils::SetNodeTextContent(this, mDefaultValue, true);

}

NS_IMETHODIMP

HTMLOutputElement::SubmitNamesValues(HTMLFormSubmission* aFormSubmission)

{

  // The output element is not submittable.

  return NS_OK;

}

bool

HTMLOutputElement::ParseAttribute(int32_t aNamespaceID,

                                  nsAtom* aAttribute,

                                  const nsAString& aValue,

                                  nsIPrincipal* aMaybeScriptedPrincipal,

                                  nsAttrValue& aResult)

{

  if (aNamespaceID == kNameSpaceID_None) {

    if (aAttribute == nsGkAtoms::_for) {

      aResult.ParseAtomArray(aValue);

      return true;

    }

  }

  return nsGenericHTMLFormElement::ParseAttribute(aNamespaceID, aAttribute,

                                                  aValue,

                                                  aMaybeScriptedPrincipal,

                                                  aResult);

}

void

HTMLOutputElement::DoneAddingChildren(bool aHaveNotified)

{

  mIsDoneAddingChildren = true;

}

EventStates

HTMLOutputElement::IntrinsicState() const

{

  EventStates states = nsGenericHTMLFormElement::IntrinsicState();

  // We don't have to call IsCandidateForConstraintValidation()

  // because <output> can't be barred from constraint validation.

  if (IsValid()) {

    states |= NS_EVENT_STATE_VALID;

    if (!mForm || !mForm->HasAttr(kNameSpaceID_None, nsGkAtoms::novalidate)) {

      states |= NS_EVENT_STATE_MOZ_UI_VALID;

    }

  } else {

    states |= NS_EVENT_STATE_INVALID;

    if (!mForm || !mForm->HasAttr(kNameSpaceID_None, nsGkAtoms::novalidate)) {

      states |= NS_EVENT_STATE_MOZ_UI_INVALID;

    }

  }

  return states;

}

nsresult

HTMLOutputElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,

                              nsIContent* aBindingParent)

{

  nsresult rv = nsGenericHTMLFormElement::BindToTree(aDocument, aParent,

                                                     aBindingParent);

  NS_ENSURE_SUCCESS(rv, rv);

  // Unfortunately, we can actually end up having to change our state

  // as a result of being bound to a tree even from the parser: we

  // might end up a in a novalidate form, and unlike other form

  // controls that on its own is enough to make change ui-valid state.

  // So just go ahead and update our state now.

  UpdateState(false);

  return rv;

}

void

HTMLOutputElement::GetValue(nsAString& aValue)

{

  nsContentUtils::GetNodeTextContent(this, true, aValue);

}

void

HTMLOutputElement::SetValue(const nsAString& aValue, ErrorResult& aRv)

{

  mValueModeFlag = eModeValue;

  aRv = nsContentUtils::SetNodeTextContent(this, aValue, true);

}

void

HTMLOutputElement::SetDefaultValue(const nsAString& aDefaultValue, ErrorResult& aRv)

{

  mDefaultValue = aDefaultValue;

  if (mValueModeFlag == eModeDefault) {

    // We can't pass mDefaultValue, because it'll be truncated when

    // the element's descendants are changed.

    aRv = nsContentUtils::SetNodeTextContent(this, aDefaultValue, true);

  }

}

nsDOMTokenList*

HTMLOutputElement::HtmlFor()

{

  if (!mTokenList) {

    mTokenList = new nsDOMTokenList(this, nsGkAtoms::_for);

  }

  return mTokenList;

}

void HTMLOutputElement::DescendantsChanged()

{

  if (mIsDoneAddingChildren && mValueModeFlag == eModeDefault) {

    nsContentUtils::GetNodeTextContent(this, true, mDefaultValue);

  }

}

// nsIMutationObserver

void HTMLOutputElement::CharacterDataChanged(nsIContent* aContent,

                                             const CharacterDataChangeInfo&)

{

  DescendantsChanged();

}

void HTMLOutputElement::ContentAppended(nsIContent* aFirstNewContent)

{

  DescendantsChanged();

}

void HTMLOutputElement::ContentInserted(nsIContent* aChild)

{

  DescendantsChanged();

}

void HTMLOutputElement::ContentRemoved(nsIContent* aChild,

                                       nsIContent* aPreviousSibling)

{

  DescendantsChanged();

}

JSObject*

HTMLOutputElement::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)

{

  return HTMLOutputElement_Binding::Wrap(aCx, this, aGivenProto);

}

} // namespace dom

} // namespace mozilla