dom/html/HTMLTableCellElement.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 "mozilla/dom/HTMLTableCellElement.h"
   8 #include "mozilla/dom/Document.h"
   9 #include "mozilla/dom/HTMLTableElement.h"
  10 #include "mozilla/dom/HTMLTableRowElement.h"
  11 #include "mozilla/MappedDeclarationsBuilder.h"
  12 #include "nsAttrValueInlines.h"
  13 #include "celldata.h"
  14 #include "mozilla/dom/HTMLTableCellElementBinding.h"
  15
  16 namespace {
  17 enum class StyleCellScope : uint8_t { Row, Col, Rowgroup, Colgroup };
  18 }  // namespace
  19
  20 NS_IMPL_NS_NEW_HTML_ELEMENT(TableCell)
  21
  22 namespace mozilla::dom {
  23
  24 HTMLTableCellElement::~HTMLTableCellElement() = default;
  25
  26 JSObject* HTMLTableCellElement::WrapNode(JSContext* aCx,
  27                                          JS::Handle<JSObject*> aGivenProto) {
  28   return HTMLTableCellElement_Binding::Wrap(aCx, this, aGivenProto);
  29 }
  30
  31 NS_IMPL_ELEMENT_CLONE(HTMLTableCellElement)
  32
  33 // protected method
  34 HTMLTableRowElement* HTMLTableCellElement::GetRow() const {
  35   return HTMLTableRowElement::FromNodeOrNull(GetParent());
  36 }
  37
  38 // protected method
  39 HTMLTableElement* HTMLTableCellElement::GetTable() const {
  40   nsIContent* parent = GetParent();
  41   if (!parent) {
  42     return nullptr;
  43   }
  44
  45   // parent should be a row.
  46   nsIContent* section = parent->GetParent();
  47   if (!section) {
  48     return nullptr;
  49   }
  50
  51   if (section->IsHTMLElement(nsGkAtoms::table)) {
  52     // XHTML, without a row group.
  53     return static_cast<HTMLTableElement*>(section);
  54   }
  55
  56   // We have a row group.
  57   nsIContent* result = section->GetParent();
  58   if (result && result->IsHTMLElement(nsGkAtoms::table)) {
  59     return static_cast<HTMLTableElement*>(result);
  60   }
  61
  62   return nullptr;
  63 }
  64
  65 int32_t HTMLTableCellElement::CellIndex() const {
  66   HTMLTableRowElement* row = GetRow();
  67   if (!row) {
  68     return -1;
  69   }
  70
  71   nsIHTMLCollection* cells = row->Cells();
  72   if (!cells) {
  73     return -1;
  74   }
  75
  76   uint32_t numCells = cells->Length();
  77   for (uint32_t i = 0; i < numCells; i++) {
  78     if (cells->Item(i) == this) {
  79       return i;
  80     }
  81   }
  82
  83   return -1;
  84 }
  85
  86 StyleLockedDeclarationBlock*
  87 HTMLTableCellElement::GetMappedAttributesInheritedFromTable() const {
  88   if (HTMLTableElement* table = GetTable()) {
  89     return table->GetAttributesMappedForCell();
  90   }
  91   return nullptr;
  92 }
  93
  94 void HTMLTableCellElement::GetAlign(DOMString& aValue) {
  95   if (!GetAttr(nsGkAtoms::align, aValue)) {
  96     // There's no align attribute, ask the row for the alignment.
  97     HTMLTableRowElement* row = GetRow();
  98     if (row) {
  99       row->GetAlign(aValue);
 100     }
 101   }
 102 }
 103
 104 static const nsAttrValue::EnumTable kCellScopeTable[] = {
 105     {"row", StyleCellScope::Row},
 106     {"col", StyleCellScope::Col},
 107     {"rowgroup", StyleCellScope::Rowgroup},
 108     {"colgroup", StyleCellScope::Colgroup},
 109     {nullptr, 0}};
 110
 111 void HTMLTableCellElement::GetScope(DOMString& aScope) {
 112   GetEnumAttr(nsGkAtoms::scope, nullptr, aScope);
 113 }
 114
 115 bool HTMLTableCellElement::ParseAttribute(int32_t aNamespaceID,
 116                                           nsAtom* aAttribute,
 117                                           const nsAString& aValue,
 118                                           nsIPrincipal* aMaybeScriptedPrincipal,
 119                                           nsAttrValue& aResult) {
 120   if (aNamespaceID == kNameSpaceID_None) {
 121     /* ignore these attributes, stored simply as strings
 122        abbr, axis, ch, headers
 123     */
 124     if (aAttribute == nsGkAtoms::colspan) {
 125       aResult.ParseClampedNonNegativeInt(aValue, 1, 1, MAX_COLSPAN);
 126       return true;
 127     }
 128     if (aAttribute == nsGkAtoms::rowspan) {
 129       aResult.ParseClampedNonNegativeInt(aValue, 1, 0, MAX_ROWSPAN);
 130       // quirks mode does not honor the special html 4 value of 0
 131       if (aResult.GetIntegerValue() == 0 && InNavQuirksMode(OwnerDoc())) {
 132         aResult.SetTo(1, &aValue);
 133       }
 134       return true;
 135     }
 136     if (aAttribute == nsGkAtoms::height) {
 137       return aResult.ParseNonzeroHTMLDimension(aValue);
 138     }
 139     if (aAttribute == nsGkAtoms::width) {
 140       return aResult.ParseNonzeroHTMLDimension(aValue);
 141     }
 142     if (aAttribute == nsGkAtoms::align) {
 143       return ParseTableCellHAlignValue(aValue, aResult);
 144     }
 145     if (aAttribute == nsGkAtoms::bgcolor) {
 146       return aResult.ParseColor(aValue);
 147     }
 148     if (aAttribute == nsGkAtoms::scope) {
 149       return aResult.ParseEnumValue(aValue, kCellScopeTable, false);
 150     }
 151     if (aAttribute == nsGkAtoms::valign) {
 152       return ParseTableVAlignValue(aValue, aResult);
 153     }
 154   }
 155
 156   return nsGenericHTMLElement::ParseBackgroundAttribute(
 157              aNamespaceID, aAttribute, aValue, aResult) ||
 158          nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
 159                                               aMaybeScriptedPrincipal, aResult);
 160 }
 161
 162 void HTMLTableCellElement::MapAttributesIntoRule(
 163     MappedDeclarationsBuilder& aBuilder) {
 164   MapImageSizeAttributesInto(aBuilder);
 165
 166   if (!aBuilder.PropertyIsSet(eCSSProperty_text_wrap_mode)) {
 167     // nowrap: enum
 168     if (aBuilder.GetAttr(nsGkAtoms::nowrap)) {
 169       // See if our width is not a nonzero integer width.
 170       const nsAttrValue* value = aBuilder.GetAttr(nsGkAtoms::width);
 171       nsCompatibility mode = aBuilder.Document().GetCompatibilityMode();
 172       if (!value || value->Type() != nsAttrValue::eInteger ||
 173           value->GetIntegerValue() == 0 || eCompatibility_NavQuirks != mode) {
 174         aBuilder.SetKeywordValue(eCSSProperty_text_wrap_mode,
 175                                  StyleTextWrapMode::Nowrap);
 176       }
 177     }
 178   }
 179
 180   nsGenericHTMLElement::MapDivAlignAttributeInto(aBuilder);
 181   nsGenericHTMLElement::MapVAlignAttributeInto(aBuilder);
 182   nsGenericHTMLElement::MapBackgroundAttributesInto(aBuilder);
 183   nsGenericHTMLElement::MapCommonAttributesInto(aBuilder);
 184 }
 185
 186 NS_IMETHODIMP_(bool)
 187 HTMLTableCellElement::IsAttributeMapped(const nsAtom* aAttribute) const {
 188   static const MappedAttributeEntry attributes[] = {
 189       {nsGkAtoms::align}, {nsGkAtoms::valign}, {nsGkAtoms::nowrap},
 190 #if 0
 191     // XXXldb If these are implemented, they might need to move to
 192     // GetAttributeChangeHint (depending on how, and preferably not).
 193     { nsGkAtoms::abbr },
 194     { nsGkAtoms::axis },
 195     { nsGkAtoms::headers },
 196     { nsGkAtoms::scope },
 197 #endif
 198       {nsGkAtoms::width}, {nsGkAtoms::height}, {nullptr}};
 199
 200   static const MappedAttributeEntry* const map[] = {
 201       attributes,
 202       sCommonAttributeMap,
 203       sBackgroundAttributeMap,
 204   };
 205
 206   return FindAttributeDependence(aAttribute, map);
 207 }
 208
 209 nsMapRuleToAttributesFunc HTMLTableCellElement::GetAttributeMappingFunction()
 210     const {
 211   return &MapAttributesIntoRule;
 212 }
 213
 214 }  // namespace mozilla::dom