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LibHTML: Add is<ElementType> and to<ElementType> helper functions

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These will help us write node-type-aware template functions.
This commit is contained in:
Andreas Kling 2019-10-06 20:37:39 +02:00
parent bedb00603c
commit f52f2736e1
12 changed files with 93 additions and 22 deletions
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8
Libraries/LibHTML/CSS/StyleResolver.cpp
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@ -40,17 +40,17 @@ static bool matches(const Selector& selector, int component_index, const Element
case Selector::Component::Relation::Descendant:
ASSERT(component_index != 0);
for (auto* ancestor = element.parent(); ancestor; ancestor = ancestor->parent()) {
if (!ancestor->is_element())
if (!is<Element>(*ancestor))
continue;
if (matches(selector, component_index - 1, static_cast<const Element&>(*ancestor)))
if (matches(selector, component_index - 1, to<Element>(*ancestor)))
return true;
}
return false;
case Selector::Component::Relation::ImmediateChild:
ASSERT(component_index != 0);
if (!element.parent() || !element.parent()->is_element())
if (!element.parent() || !is<Element>(*element.parent()))
return false;
return matches(selector, component_index - 1, static_cast<const Element&>(*element.parent()));
return matches(selector, component_index - 1, to<Element>(*element.parent()));
case Selector::Component::Relation::AdjacentSibling:
ASSERT(component_index != 0);
if (auto* sibling = element.previous_element_sibling())