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/MappedDeclarations.h"
  11 #include "nsAttrValueInlines.h"
  12 #include "nsMappedAttributes.h"
  13 #include "nsContentUtils.h"
  14
  15 NS_IMPL_NS_NEW_HTML_ELEMENT(Font)
  16
  17 namespace mozilla::dom {
  18
  19 HTMLFontElement::~HTMLFontElement() = default;
  20
  21 JSObject* HTMLFontElement::WrapNode(JSContext* aCx,
  22                                     JS::Handle<JSObject*> aGivenProto) {
  23   return HTMLFontElement_Binding::Wrap(aCx, this, aGivenProto);
  24 }
  25
  26 NS_IMPL_ELEMENT_CLONE(HTMLFontElement)
  27
  28 bool HTMLFontElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
  29                                      const nsAString& aValue,
  30                                      nsIPrincipal* aMaybeScriptedPrincipal,
  31                                      nsAttrValue& aResult) {
  32   if (aNamespaceID == kNameSpaceID_None) {
  33     if (aAttribute == nsGkAtoms::size) {
  34       int32_t size = nsContentUtils::ParseLegacyFontSize(aValue);
  35       if (size) {
  36         aResult.SetTo(size, &aValue);
  37         return true;
  38       }
  39       return false;
  40     }
  41     if (aAttribute == nsGkAtoms::color) {
  42       return aResult.ParseColor(aValue);
  43     }
  44   }
  45
  46   return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
  47                                               aMaybeScriptedPrincipal, aResult);
  48 }
  49
  50 void HTMLFontElement::MapAttributesIntoRule(
  51     const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) {
  52   // face: string list
  53   if (!aDecls.PropertyIsSet(eCSSProperty_font_family)) {
  54     const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::face);
  55     if (value && value->Type() == nsAttrValue::eString &&
  56         !value->IsEmptyString()) {
  57       aDecls.SetFontFamily(NS_ConvertUTF16toUTF8(value->GetStringValue()));
  58     }
  59   }
  60   // size: int
  61   if (!aDecls.PropertyIsSet(eCSSProperty_font_size)) {
  62     const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::size);
  63     if (value && value->Type() == nsAttrValue::eInteger)
  64       aDecls.SetKeywordValue(eCSSProperty_font_size, value->GetIntegerValue());
  65   }
  66   if (!aDecls.PropertyIsSet(eCSSProperty_color)) {
  67     // color: color
  68     const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::color);
  69     nscolor color;
  70     if (value && value->GetColorValue(color)) {
  71       aDecls.SetColorValue(eCSSProperty_color, color);
  72     }
  73   }
  74   if (aDecls.Document()->GetCompatibilityMode() == eCompatibility_NavQuirks) {
  75     // Make <a><font color="red">text</font></a> give the text a red underline
  76     // in quirks mode.  The StyleTextDecorationLine_COLOR_OVERRIDE flag only
  77     // affects quirks mode rendering.
  78     const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::color);
  79     nscolor color;
  80     if (value && value->GetColorValue(color)) {
  81       aDecls.SetTextDecorationColorOverride();
  82     }
  83   }
  84
  85   nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aDecls);
  86 }
  87
  88 NS_IMETHODIMP_(bool)
  89 HTMLFontElement::IsAttributeMapped(const nsAtom* aAttribute) const {
  90   static const MappedAttributeEntry attributes[] = {
  91       {nsGkAtoms::face}, {nsGkAtoms::size}, {nsGkAtoms::color}, {nullptr}};
  92
  93   static const MappedAttributeEntry* const map[] = {
  94       attributes,
  95       sCommonAttributeMap,
  96   };
  97
  98   return FindAttributeDependence(aAttribute, map);
  99 }
 100
 101 nsMapRuleToAttributesFunc HTMLFontElement::GetAttributeMappingFunction() const {
 102   return &MapAttributesIntoRule;
 103 }
 104
 105 }  // namespace mozilla::dom