c37820b898
https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#cother-other-default-operation-rules "The compiler is more likely to get the default semantics right and you cannot implement these functions better than the compiler."
68 lines
2.5 KiB
C++
68 lines
2.5 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/NonnullRefPtrVector.h>
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#include <LibWeb/DOM/Element.h>
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#include <LibWeb/Forward.h>
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namespace Web::HTML {
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// https://html.spec.whatwg.org/multipage/parsing.html#stack-of-open-elements
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class StackOfOpenElements {
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public:
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// Initially, the stack of open elements is empty.
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// The stack grows downwards; the topmost node on the stack is the first one added to the stack,
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// and the bottommost node of the stack is the most recently added node in the stack
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// (notwithstanding when the stack is manipulated in a random access fashion as part of the handling for misnested tags).
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StackOfOpenElements() = default;
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~StackOfOpenElements();
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DOM::Element& first() { return m_elements.first(); }
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DOM::Element& last() { return m_elements.last(); }
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bool is_empty() const { return m_elements.is_empty(); }
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void push(NonnullRefPtr<DOM::Element> element) { m_elements.append(move(element)); }
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NonnullRefPtr<DOM::Element> pop() { return m_elements.take_last(); }
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const DOM::Element& current_node() const { return m_elements.last(); }
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DOM::Element& current_node() { return m_elements.last(); }
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bool has_in_scope(const FlyString& tag_name) const;
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bool has_in_button_scope(const FlyString& tag_name) const;
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bool has_in_table_scope(const FlyString& tag_name) const;
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bool has_in_list_item_scope(const FlyString& tag_name) const;
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bool has_in_select_scope(const FlyString& tag_name) const;
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bool has_in_scope(const DOM::Element&) const;
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bool contains(const DOM::Element&) const;
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bool contains(const FlyString& tag_name) const;
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const NonnullRefPtrVector<DOM::Element>& elements() const { return m_elements; }
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NonnullRefPtrVector<DOM::Element>& elements() { return m_elements; }
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void pop_until_an_element_with_tag_name_has_been_popped(const FlyString&);
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DOM::Element* topmost_special_node_below(const DOM::Element&);
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struct LastElementResult {
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DOM::Element* element;
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ssize_t index;
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};
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LastElementResult last_element_with_tag_name(const FlyString&);
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DOM::Element* element_immediately_above(DOM::Element const&);
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private:
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bool has_in_scope_impl(const FlyString& tag_name, const Vector<FlyString>&) const;
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bool has_in_scope_impl(const DOM::Element& target_node, const Vector<FlyString>&) const;
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NonnullRefPtrVector<DOM::Element> m_elements;
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};
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}
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