/* -*- 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/HTMLProgressElement.h"
#include "mozilla/dom/HTMLProgressElementBinding.h"

NS_IMPL_NS_NEW_HTML_ELEMENT(Progress)

namespace mozilla::dom {

const double HTMLProgressElement::kIndeterminatePosition = -1.0;
const double HTMLProgressElement::kDefaultValue = 0.0;
const double HTMLProgressElement::kDefaultMax = 1.0;

HTMLProgressElement::HTMLProgressElement(
    already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
    : nsGenericHTMLElement(std::move(aNodeInfo)) {
  // We start out indeterminate
  AddStatesSilently(ElementState::INDETERMINATE);
}

HTMLProgressElement::~HTMLProgressElement() = default;

NS_IMPL_ELEMENT_CLONE(HTMLProgressElement)

ElementState HTMLProgressElement::IntrinsicState() const {
  ElementState state = nsGenericHTMLElement::IntrinsicState();

  const nsAttrValue* attrValue = mAttrs.GetAttr(nsGkAtoms::value);
  if (!attrValue || attrValue->Type() != nsAttrValue::eDoubleValue) {
    state |= ElementState::INDETERMINATE;
  }

  return state;
}

bool HTMLProgressElement::ParseAttribute(int32_t aNamespaceID,
                                         nsAtom* aAttribute,
                                         const nsAString& aValue,
                                         nsIPrincipal* aMaybeScriptedPrincipal,
                                         nsAttrValue& aResult) {
  if (aNamespaceID == kNameSpaceID_None) {
    if (aAttribute == nsGkAtoms::value || aAttribute == nsGkAtoms::max) {
      return aResult.ParseDoubleValue(aValue);
    }
  }

  return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
                                              aMaybeScriptedPrincipal, aResult);
}

double HTMLProgressElement::Value() const {
  const nsAttrValue* attrValue = mAttrs.GetAttr(nsGkAtoms::value);
  if (!attrValue || attrValue->Type() != nsAttrValue::eDoubleValue ||
      attrValue->GetDoubleValue() < 0.0) {
    return kDefaultValue;
  }

  return std::min(attrValue->GetDoubleValue(), Max());
}

double HTMLProgressElement::Max() const {
  const nsAttrValue* attrMax = mAttrs.GetAttr(nsGkAtoms::max);
  if (!attrMax || attrMax->Type() != nsAttrValue::eDoubleValue ||
      attrMax->GetDoubleValue() <= 0.0) {
    return kDefaultMax;
  }

  return attrMax->GetDoubleValue();
}

double HTMLProgressElement::Position() const {
  if (State().HasState(ElementState::INDETERMINATE)) {
    return kIndeterminatePosition;
  }

  return Value() / Max();
}

JSObject* HTMLProgressElement::WrapNode(JSContext* aCx,
                                        JS::Handle<JSObject*> aGivenProto) {
  return HTMLProgressElement_Binding::Wrap(aCx, this, aGivenProto);
}

}  // namespace mozilla::dom