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HTMLTableColElement.cpp (3984B)

      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 "mozilla/dom/HTMLTableColElement.h"
      8 
      9 #include "mozilla/MappedDeclarationsBuilder.h"
     10 #include "mozilla/dom/HTMLTableColElementBinding.h"
     11 #include "nsAttrValueInlines.h"
     12 
     13 NS_IMPL_NS_NEW_HTML_ELEMENT(TableCol)
     14 
     15 namespace mozilla::dom {
     16 
     17 // use the same protection as ancient code did
     18 // http://lxr.mozilla.org/classic/source/lib/layout/laytable.c#46
     19 #define MAX_COLSPAN 1000
     20 
     21 HTMLTableColElement::~HTMLTableColElement() = default;
     22 
     23 JSObject* HTMLTableColElement::WrapNode(JSContext* aCx,
     24                                        JS::Handle<JSObject*> aGivenProto) {
     25  return HTMLTableColElement_Binding::Wrap(aCx, this, aGivenProto);
     26 }
     27 
     28 NS_IMPL_ELEMENT_CLONE(HTMLTableColElement)
     29 
     30 bool HTMLTableColElement::ParseAttribute(int32_t aNamespaceID,
     31                                         nsAtom* aAttribute,
     32                                         const nsAString& aValue,
     33                                         nsIPrincipal* aMaybeScriptedPrincipal,
     34                                         nsAttrValue& aResult) {
     35  if (aNamespaceID == kNameSpaceID_None) {
     36    /* ignore these attributes, stored simply as strings ch */
     37    if (aAttribute == nsGkAtoms::span) {
     38      /* protection from unrealistic large colspan values */
     39      aResult.ParseClampedNonNegativeInt(aValue, 1, 1, MAX_COLSPAN);
     40      return true;
     41    }
     42    if (aAttribute == nsGkAtoms::width) {
     43      // Spec says to use ParseNonzeroHTMLDimension, but Chrome and Safari both
     44      // allow 0, and we did all along too, so keep that behavior.  See
     45      // https://github.com/whatwg/html/issues/4717
     46      return aResult.ParseHTMLDimension(aValue);
     47    }
     48    if (aAttribute == nsGkAtoms::align) {
     49      return ParseTableCellHAlignValue(aValue, aResult);
     50    }
     51    if (aAttribute == nsGkAtoms::valign) {
     52      return ParseTableVAlignValue(aValue, aResult);
     53    }
     54  }
     55 
     56  return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
     57                                              aMaybeScriptedPrincipal, aResult);
     58 }
     59 
     60 void HTMLTableColElement::MapAttributesIntoRule(
     61    MappedDeclarationsBuilder& aBuilder) {
     62  if (!aBuilder.PropertyIsSet(eCSSProperty__x_span)) {
     63    // span: int
     64    const nsAttrValue* value = aBuilder.GetAttr(nsGkAtoms::span);
     65    if (value && value->Type() == nsAttrValue::eInteger) {
     66      int32_t val = value->GetIntegerValue();
     67      // Note: Do NOT use this code for table cells!  The value "0"
     68      // means something special for colspan and rowspan, but for <col
     69      // span> and <colgroup span> it's just disallowed.
     70      if (val > 0) {
     71        aBuilder.SetIntValue(eCSSProperty__x_span, value->GetIntegerValue());
     72      }
     73    }
     74  }
     75 
     76  nsGenericHTMLElement::MapWidthAttributeInto(aBuilder);
     77  nsGenericHTMLElement::MapTableCellHAlignAttributeInto(aBuilder);
     78  nsGenericHTMLElement::MapTableVAlignAttributeInto(aBuilder);
     79  nsGenericHTMLElement::MapCommonAttributesInto(aBuilder);
     80 }
     81 
     82 NS_IMETHODIMP_(bool)
     83 HTMLTableColElement::IsAttributeMapped(const nsAtom* aAttribute) const {
     84  static const MappedAttributeEntry attributes[] = {{nsGkAtoms::width},
     85                                                    {nsGkAtoms::align},
     86                                                    {nsGkAtoms::valign},
     87                                                    {nsGkAtoms::span},
     88                                                    {nullptr}};
     89 
     90  static const MappedAttributeEntry* const map[] = {
     91      attributes,
     92      sCommonAttributeMap,
     93  };
     94 
     95  return FindAttributeDependence(aAttribute, map);
     96 }
     97 
     98 nsMapRuleToAttributesFunc HTMLTableColElement::GetAttributeMappingFunction()
     99    const {
    100  return &MapAttributesIntoRule;
    101 }
    102 
    103 }  // namespace mozilla::dom