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Bug 1774043: [Part 2] Add implicit relations map, pre- and post-update map processing in ApplyCache r=Jamie

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Differential Revision: https://phabricator.services.mozilla.com/D152101
This commit is contained in:
Morgan Rae Reschenberg
2022-08-03 05:09:53 +00:00
parent 42cb285b09
commit d1055873bd
4 changed files with 135 additions and 13 deletions
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25
accessible/base/CacheConstants.h
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@@ -50,22 +50,25 @@ struct RelationData {
nsStaticAtom* const mAtom;
nsStaticAtom* const mValidTag;
RelationType mType;
RelationType mReverseType;
};
/**
* This array of RelationData lists our relation types and the cache
* attribute atoms that store their targets. Attributes may describe
* different kinds of relations, depending on the element they originate on.
* For example, an <output> element's `for` attribute describes a CONTROLLER_FOR
* relation, while the `for` attribute of a <label> describes a LABEL_FOR
* relation.
* To ensure we process these attributes appropriately, RelationData.mValidTag
* contains the atom for the tag this attribute/relation type paring is valid
* on. If the pairing is valid for all tag types, this field is null.
* This array of RelationData lists our relation types (explicit and reverse)
* and the cache attribute atoms that store their targets. Attributes may
* describe different kinds of relations, depending on the element they
* originate on. For example, an <output> element's `for` attribute describes a
* CONTROLLER_FOR relation, while the `for` attribute of a <label> describes a
* LABEL_FOR relation. To ensure we process these attributes appropriately,
* RelationData.mValidTag contains the atom for the tag this attribute/relation
* type paring is valid on. If the pairing is valid for all tag types, this
* field is null.
*/
static constexpr RelationData kRelationTypeAtoms[] = {
{nsGkAtoms::aria_labelledby, nullptr, RelationType::LABELLED_BY},
{nsGkAtoms::_for, nsGkAtoms::label, RelationType::LABEL_FOR},
{nsGkAtoms::aria_labelledby, nullptr, RelationType::LABELLED_BY,
RelationType::LABEL_FOR},
{nsGkAtoms::_for, nsGkAtoms::label, RelationType::LABEL_FOR,
RelationType::LABELLED_BY},
};
} // namespace a11y