tor-browser

HTMLHRElement.cpp (7168B)

---

/* -*- 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/MappedDeclarationsBuilder.h"
#include "mozilla/dom/HTMLHRElementBinding.h"
#include "nsCSSProps.h"
#include "nsStyleConsts.h"

NS_IMPL_NS_NEW_HTML_ELEMENT(HR)

namespace mozilla::dom {

HTMLHRElement::HTMLHRElement(
   already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
   : nsGenericHTMLElement(std::move(aNodeInfo)) {}

HTMLHRElement::~HTMLHRElement() = default;

NS_IMPL_ELEMENT_CLONE(HTMLHRElement)

bool HTMLHRElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
                                  const nsAString& aValue,
                                  nsIPrincipal* aMaybeScriptedPrincipal,
                                  nsAttrValue& aResult) {
 static const nsAttrValue::EnumTableEntry kAlignTable[] = {
     {"left", StyleTextAlign::Left},
     {"right", StyleTextAlign::Right},
     {"center", StyleTextAlign::Center},
 };

 if (aNamespaceID == kNameSpaceID_None) {
   if (aAttribute == nsGkAtoms::width) {
     return aResult.ParseHTMLDimension(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(MappedDeclarationsBuilder& aBuilder) {
 bool noshade = false;

 const nsAttrValue* colorValue = aBuilder.GetAttr(nsGkAtoms::color);
 nscolor color;
 bool colorIsSet = colorValue && colorValue->GetColorValue(color);

 if (colorIsSet) {
   noshade = true;
 } else {
   noshade = !!aBuilder.GetAttr(nsGkAtoms::noshade);
 }

 // align: enum
 const nsAttrValue* value = aBuilder.GetAttr(nsGkAtoms::align);
 if (value && value->Type() == nsAttrValue::eEnum) {
   // Map align attribute into auto side margins
   switch (StyleTextAlign(value->GetEnumValue())) {
     case StyleTextAlign::Left:
       aBuilder.SetPixelValueIfUnset(eCSSProperty_margin_left, 0.0f);
       aBuilder.SetAutoValueIfUnset(eCSSProperty_margin_right);
       break;
     case StyleTextAlign::Right:
       aBuilder.SetAutoValueIfUnset(eCSSProperty_margin_left);
       aBuilder.SetPixelValueIfUnset(eCSSProperty_margin_right, 0.0f);
       break;
     case StyleTextAlign::Center:
       aBuilder.SetAutoValueIfUnset(eCSSProperty_margin_left);
       aBuilder.SetAutoValueIfUnset(eCSSProperty_margin_right);
       break;
     default:
       MOZ_ASSERT_UNREACHABLE("Unknown <hr align> value");
       break;
   }
 }
 if (!aBuilder.PropertyIsSet(eCSSProperty_height)) {
   // size: integer
   if (noshade) {
     // noshade case: size is set using the border
     aBuilder.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 = aBuilder.GetAttr(nsGkAtoms::size);
     if (value && value->Type() == nsAttrValue::eInteger) {
       aBuilder.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 = aBuilder.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
   }
   aBuilder.SetPixelValueIfUnset(eCSSProperty_border_top_width, sizePerSide);
   if (allSides) {
     aBuilder.SetPixelValueIfUnset(eCSSProperty_border_right_width,
                                   sizePerSide);
     aBuilder.SetPixelValueIfUnset(eCSSProperty_border_bottom_width,
                                   sizePerSide);
     aBuilder.SetPixelValueIfUnset(eCSSProperty_border_left_width,
                                   sizePerSide);
   }

   if (!aBuilder.PropertyIsSet(eCSSProperty_border_top_style)) {
     aBuilder.SetKeywordValue(eCSSProperty_border_top_style,
                              StyleBorderStyle::Solid);
   }
   if (allSides) {
     aBuilder.SetKeywordValueIfUnset(eCSSProperty_border_right_style,
                                     StyleBorderStyle::Solid);
     aBuilder.SetKeywordValueIfUnset(eCSSProperty_border_bottom_style,
                                     StyleBorderStyle::Solid);
     aBuilder.SetKeywordValueIfUnset(eCSSProperty_border_left_style,
                                     StyleBorderStyle::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 NonCustomCSSPropertyId* props =
              nsCSSProps::SubpropertyEntryFor(eCSSProperty_border_radius);
          *props != eCSSProperty_UNKNOWN; ++props) {
       aBuilder.SetPixelValueIfUnset(*props, 10000.0f);
     }
   }
 }
 // color: a color
 // (we got the color attribute earlier)
 if (colorIsSet) {
   aBuilder.SetColorValueIfUnset(eCSSProperty_color, color);
 }
 MapWidthAttributeInto(aBuilder);
 MapCommonAttributesInto(aBuilder);
}

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 mozilla::dom