/* -*- 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/HTMLHRElement.h"

#include "mozilla/dom/HTMLHRElementBinding.h"

#include "nsCSSProps.h"

NS_IMPL_NS_NEW_HTML_ELEMENT(HR)

namespace mozilla {

namespace dom {

HTMLHRElement::HTMLHRElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)

  : nsGenericHTMLElement(std::move(aNodeInfo))

{

}

HTMLHRElement::~HTMLHRElement()

{

}

NS_IMPL_ELEMENT_CLONE(HTMLHRElement)

bool

HTMLHRElement::ParseAttribute(int32_t aNamespaceID,

                              nsAtom* aAttribute,

                              const nsAString& aValue,

                              nsIPrincipal* aMaybeScriptedPrincipal,

                              nsAttrValue& aResult)

{

  static const nsAttrValue::EnumTable kAlignTable[] = {

    { "left", NS_STYLE_TEXT_ALIGN_LEFT },

    { "right", NS_STYLE_TEXT_ALIGN_RIGHT },

    { "center", NS_STYLE_TEXT_ALIGN_CENTER },

    { nullptr, 0 }

  };

  if (aNamespaceID == kNameSpaceID_None) {

    if (aAttribute == nsGkAtoms::width) {

      return aResult.ParseSpecialIntValue(aValue);

    }

    if (aAttribute == nsGkAtoms::size) {

      return aResult.ParseIntWithBounds(aValue, 1, 1000);

    }

    if (aAttribute == nsGkAtoms::align) {

      return aResult.ParseEnumValue(aValue, kAlignTable, false);

    }

    if (aAttribute == nsGkAtoms::color) {

      return aResult.ParseColor(aValue);

    }

  }

  return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,

                                              aMaybeScriptedPrincipal, aResult);

}

void

HTMLHRElement::MapAttributesIntoRule(const nsMappedAttributes* aAttributes,

                                     MappedDeclarations& aDecls)

{

  bool noshade = false;

  const nsAttrValue* colorValue = aAttributes->GetAttr(nsGkAtoms::color);

  nscolor color;

  bool colorIsSet = colorValue && colorValue->GetColorValue(color);

  if (colorIsSet) {

    noshade = true;

  } else {

    noshade = !!aAttributes->GetAttr(nsGkAtoms::noshade);

  }

  // align: enum

  const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::align);

  if (value && value->Type() == nsAttrValue::eEnum) {

    // Map align attribute into auto side margins

    switch (value->GetEnumValue()) {

    case NS_STYLE_TEXT_ALIGN_LEFT:

      aDecls.SetPixelValueIfUnset(eCSSProperty_margin_left, 0.0f);

      aDecls.SetAutoValueIfUnset(eCSSProperty_margin_right);

      break;

    case NS_STYLE_TEXT_ALIGN_RIGHT:

      aDecls.SetAutoValueIfUnset(eCSSProperty_margin_left);

      aDecls.SetPixelValueIfUnset(eCSSProperty_margin_right, 0.0f);

      break;

    case NS_STYLE_TEXT_ALIGN_CENTER:

      aDecls.SetAutoValueIfUnset(eCSSProperty_margin_left);

      aDecls.SetAutoValueIfUnset(eCSSProperty_margin_right);

      break;

    }

  }

  if (!aDecls.PropertyIsSet(eCSSProperty_height)) {

    // size: integer

    if (noshade) {

      // noshade case: size is set using the border

      aDecls.SetAutoValue(eCSSProperty_height);

    } else {

      // normal case

      // the height includes the top and bottom borders that are initially 1px.

      // for size=1, html.css has a special case rule that makes this work by

      // removing all but the top border.

      const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::size);

      if (value && value->Type() == nsAttrValue::eInteger) {

        aDecls.SetPixelValue(eCSSProperty_height, (float)value->GetIntegerValue());

      } // else use default value from html.css

    }

  }

  // if not noshade, border styles are dealt with by html.css

  if (noshade) {

    // size: integer

    // if a size is set, use half of it per side, otherwise, use 1px per side

    float sizePerSide;

    bool allSides = true;

    value = aAttributes->GetAttr(nsGkAtoms::size);

    if (value && value->Type() == nsAttrValue::eInteger) {

      sizePerSide = (float)value->GetIntegerValue() / 2.0f;

      if (sizePerSide < 1.0f) {

        // XXX When the pixel bug is fixed, all the special casing for

        // subpixel borders should be removed.

        // In the meantime, this makes http://www.microsoft.com/ look right.

        sizePerSide = 1.0f;

        allSides = false;

      }

    } else {

      sizePerSide = 1.0f; // default to a 2px high line

    }

    aDecls.SetPixelValueIfUnset(eCSSProperty_border_top_width, sizePerSide);

    if (allSides) {

      aDecls.SetPixelValueIfUnset(eCSSProperty_border_right_width, sizePerSide);

      aDecls.SetPixelValueIfUnset(eCSSProperty_border_bottom_width, sizePerSide);

      aDecls.SetPixelValueIfUnset(eCSSProperty_border_left_width, sizePerSide);

    }

    if (!aDecls.PropertyIsSet(eCSSProperty_border_top_style))

      aDecls.SetKeywordValue(eCSSProperty_border_top_style,

                             NS_STYLE_BORDER_STYLE_SOLID);

    if (allSides) {

      aDecls.SetKeywordValueIfUnset(eCSSProperty_border_right_style,

                                    NS_STYLE_BORDER_STYLE_SOLID);

      aDecls.SetKeywordValueIfUnset(eCSSProperty_border_bottom_style,

                                    NS_STYLE_BORDER_STYLE_SOLID);

      aDecls.SetKeywordValueIfUnset(eCSSProperty_border_left_style,

                                    NS_STYLE_BORDER_STYLE_SOLID);

      // If it would be noticeable, set the border radius to

      // 10000px on all corners; this triggers the clamping to make

      // circular ends.  This assumes the <hr> isn't larger than

      // that in *both* dimensions.

      for (const nsCSSPropertyID* props =

            nsCSSProps::SubpropertyEntryFor(eCSSProperty_border_radius);

           *props != eCSSProperty_UNKNOWN; ++props) {

        aDecls.SetPixelValueIfUnset(*props, 10000.0f);

      }

    }

  }

  // color: a color

  // (we got the color attribute earlier)

  if (colorIsSet) {

    aDecls.SetColorValueIfUnset(eCSSProperty_color, color);

  }

  nsGenericHTMLElement::MapWidthAttributeInto(aAttributes, aDecls);

  nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aDecls);

}

NS_IMETHODIMP_(bool)

HTMLHRElement::IsAttributeMapped(const nsAtom* aAttribute) const

{

  static const MappedAttributeEntry attributes[] = {

    { &nsGkAtoms::align },

    { &nsGkAtoms::width },

    { &nsGkAtoms::size },

    { &nsGkAtoms::color },

    { &nsGkAtoms::noshade },

    { nullptr },

  };

  static const MappedAttributeEntry* const map[] = {

    attributes,

    sCommonAttributeMap,

  };

  return FindAttributeDependence(aAttribute, map);

}

nsMapRuleToAttributesFunc

HTMLHRElement::GetAttributeMappingFunction() const

{

  return &MapAttributesIntoRule;

}

JSObject*

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

{

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

}

} // namespace dom

} // namespace mozilla