dom/html/HTMLFontElement.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "HTMLFontElement.h"
   8 #include "mozilla/dom/Document.h"
   9 #include "mozilla/dom/HTMLFontElementBinding.h"
  10 #include "mozilla/MappedDeclarationsBuilder.h"
  11 #include "nsAttrValueInlines.h"
  12 #include "nsContentUtils.h"
  13
  14 NS_IMPL_NS_NEW_HTML_ELEMENT(Font)
  15
  16 namespace mozilla::dom {
  17
  18 HTMLFontElement::~HTMLFontElement() = default;
  19
  20 JSObject* HTMLFontElement::WrapNode(JSContext* aCx,
  21                                     JS::Handle<JSObject*> aGivenProto) {
  22   return HTMLFontElement_Binding::Wrap(aCx, this, aGivenProto);
  23 }
  24
  25 NS_IMPL_ELEMENT_CLONE(HTMLFontElement)
  26
  27 bool HTMLFontElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
  28                                      const nsAString& aValue,
  29                                      nsIPrincipal* aMaybeScriptedPrincipal,
  30                                      nsAttrValue& aResult) {
  31   if (aNamespaceID == kNameSpaceID_None) {
  32     if (aAttribute == nsGkAtoms::size) {
  33       int32_t size = nsContentUtils::ParseLegacyFontSize(aValue);
  34       if (size) {
  35         aResult.SetTo(size, &aValue);
  36         return true;
  37       }
  38       return false;
  39     }
  40     if (aAttribute == nsGkAtoms::color) {
  41       return aResult.ParseColor(aValue);
  42     }
  43   }
  44
  45   return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
  46                                               aMaybeScriptedPrincipal, aResult);
  47 }
  48
  49 void HTMLFontElement::MapAttributesIntoRule(
  50     MappedDeclarationsBuilder& aBuilder) {
  51   // face: string list
  52   if (!aBuilder.PropertyIsSet(eCSSProperty_font_family)) {
  53     const nsAttrValue* value = aBuilder.GetAttr(nsGkAtoms::face);
  54     if (value && value->Type() == nsAttrValue::eString &&
  55         !value->IsEmptyString()) {
  56       aBuilder.SetFontFamily(NS_ConvertUTF16toUTF8(value->GetStringValue()));
  57     }
  58   }
  59   // size: int
  60   if (!aBuilder.PropertyIsSet(eCSSProperty_font_size)) {
  61     const nsAttrValue* value = aBuilder.GetAttr(nsGkAtoms::size);
  62     if (value && value->Type() == nsAttrValue::eInteger) {
  63       aBuilder.SetKeywordValue(eCSSProperty_font_size,
  64                                value->GetIntegerValue());
  65     }
  66   }
  67   if (!aBuilder.PropertyIsSet(eCSSProperty_color)) {
  68     // color: color
  69     const nsAttrValue* value = aBuilder.GetAttr(nsGkAtoms::color);
  70     nscolor color;
  71     if (value && value->GetColorValue(color)) {
  72       aBuilder.SetColorValue(eCSSProperty_color, color);
  73     }
  74   }
  75   if (aBuilder.Document().GetCompatibilityMode() == eCompatibility_NavQuirks) {
  76     // Make <a><font color="red">text</font></a> give the text a red underline
  77     // in quirks mode.  The StyleTextDecorationLine_COLOR_OVERRIDE flag only
  78     // affects quirks mode rendering.
  79     const nsAttrValue* value = aBuilder.GetAttr(nsGkAtoms::color);
  80     nscolor color;
  81     if (value && value->GetColorValue(color)) {
  82       aBuilder.SetTextDecorationColorOverride();
  83     }
  84   }
  85
  86   nsGenericHTMLElement::MapCommonAttributesInto(aBuilder);
  87 }
  88
  89 NS_IMETHODIMP_(bool)
  90 HTMLFontElement::IsAttributeMapped(const nsAtom* aAttribute) const {
  91   static const MappedAttributeEntry attributes[] = {
  92       {nsGkAtoms::face}, {nsGkAtoms::size}, {nsGkAtoms::color}, {nullptr}};
  93
  94   static const MappedAttributeEntry* const map[] = {
  95       attributes,
  96       sCommonAttributeMap,
  97   };
  98
  99   return FindAttributeDependence(aAttribute, map);
 100 }
 101
 102 nsMapRuleToAttributesFunc HTMLFontElement::GetAttributeMappingFunction() const {
 103   return &MapAttributesIntoRule;
 104 }
 105
 106 }  // namespace mozilla::dom