ElementAncestorIterator.h [plain text]
#pragma once
#include "ElementIterator.h"
namespace WebCore {
template<typename> class ElementAncestorRange;
template<typename ElementType> ElementAncestorRange<ElementType> lineageOfType(Element& first);
template<typename ElementType> ElementAncestorRange<const ElementType> lineageOfType(const Element& first);
template<typename ElementType> ElementAncestorRange<ElementType> ancestorsOfType(Node& descendant);
template<typename ElementType> ElementAncestorRange<const ElementType> ancestorsOfType(const Node& descendant);
template <typename ElementType>
class ElementAncestorIterator : public ElementIterator<ElementType> {
public:
explicit ElementAncestorIterator(ElementType* = nullptr);
ElementAncestorIterator& operator++();
};
template <typename ElementType>
class ElementAncestorRange {
public:
explicit ElementAncestorRange(ElementType* first);
ElementAncestorIterator<ElementType> begin() const;
static constexpr std::nullptr_t end() { return nullptr; }
ElementType* first() const { return m_first; }
private:
ElementType* const m_first;
};
template <typename ElementType>
inline ElementAncestorIterator<ElementType>::ElementAncestorIterator(ElementType* current)
: ElementIterator<ElementType>(nullptr, current)
{
}
template <typename ElementType>
inline ElementAncestorIterator<ElementType>& ElementAncestorIterator<ElementType>::operator++()
{
ElementIterator<ElementType>::traverseAncestor();
return *this;
}
template <typename ElementType>
inline ElementAncestorRange<ElementType>::ElementAncestorRange(ElementType* first)
: m_first(first)
{
}
template <typename ElementType>
inline ElementAncestorIterator<ElementType> ElementAncestorRange<ElementType>::begin() const
{
return ElementAncestorIterator<ElementType>(m_first);
}
template<> inline ElementAncestorRange<Element> lineageOfType<Element>(Element& first)
{
return ElementAncestorRange<Element>(&first);
}
template <typename ElementType>
inline ElementAncestorRange<ElementType> lineageOfType(Element& first)
{
if (is<ElementType>(first))
return ElementAncestorRange<ElementType>(&downcast<ElementType>(first));
return ancestorsOfType<ElementType>(first);
}
template<> inline ElementAncestorRange<const Element> lineageOfType<Element>(const Element& first)
{
return ElementAncestorRange<const Element>(&first);
}
template <typename ElementType>
inline ElementAncestorRange<const ElementType> lineageOfType(const Element& first)
{
if (is<ElementType>(first))
return ElementAncestorRange<const ElementType>(&downcast<ElementType>(first));
return ancestorsOfType<ElementType>(first);
}
template <typename ElementType>
inline ElementAncestorRange<ElementType> ancestorsOfType(Node& descendant)
{
return ElementAncestorRange<ElementType>(findElementAncestorOfType<ElementType>(descendant));
}
template <typename ElementType>
inline ElementAncestorRange<const ElementType> ancestorsOfType(const Node& descendant)
{
return ElementAncestorRange<const ElementType>(findElementAncestorOfType<const ElementType>(descendant));
}
}