131 lines
4.5 KiB
C++
131 lines
4.5 KiB
C++
/*
|
|
* Copyright (C) 2013-2020 Apple Inc. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
|
|
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "ElementIterator.h"
|
|
|
|
namespace WebCore {
|
|
|
|
template<typename> class ElementAncestorRange;
|
|
|
|
// Range for iterating an element and its ancestors.
|
|
template<typename ElementType> ElementAncestorRange<ElementType> lineageOfType(Element& first);
|
|
template<typename ElementType> ElementAncestorRange<const ElementType> lineageOfType(const Element& first);
|
|
|
|
// Range for iterating a node's element ancestors.
|
|
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;
|
|
};
|
|
|
|
// ElementAncestorIterator
|
|
|
|
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;
|
|
}
|
|
|
|
// ElementAncestorRange
|
|
|
|
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);
|
|
}
|
|
|
|
// Standalone functions
|
|
|
|
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));
|
|
}
|
|
|
|
} // namespace WebCore
|