139 lines
3.9 KiB
C++
139 lines
3.9 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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#include <LibWeb/DOM/Element.h>
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#include <LibWeb/HTML/Parser/HTMLParser.h>
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#include <LibWeb/HTML/Parser/StackOfOpenElements.h>
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namespace Web::HTML {
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static Vector<FlyString> s_base_list { "applet", "caption", "html", "table", "td", "th", "marquee", "object", "template" };
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StackOfOpenElements::~StackOfOpenElements()
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{
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}
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bool StackOfOpenElements::has_in_scope_impl(const FlyString& tag_name, const Vector<FlyString>& list) const
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{
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for (ssize_t i = m_elements.size() - 1; i >= 0; --i) {
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auto& node = m_elements.at(i);
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if (node.local_name() == tag_name)
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return true;
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if (list.contains_slow(node.local_name()))
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return false;
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}
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VERIFY_NOT_REACHED();
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}
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bool StackOfOpenElements::has_in_scope(const FlyString& tag_name) const
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{
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return has_in_scope_impl(tag_name, s_base_list);
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}
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bool StackOfOpenElements::has_in_scope_impl(const DOM::Element& target_node, const Vector<FlyString>& list) const
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{
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for (ssize_t i = m_elements.size() - 1; i >= 0; --i) {
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auto& node = m_elements.at(i);
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if (&node == &target_node)
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return true;
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if (list.contains_slow(node.local_name()))
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return false;
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}
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VERIFY_NOT_REACHED();
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}
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bool StackOfOpenElements::has_in_scope(const DOM::Element& target_node) const
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{
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return has_in_scope_impl(target_node, s_base_list);
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}
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bool StackOfOpenElements::has_in_button_scope(const FlyString& tag_name) const
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{
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auto list = s_base_list;
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list.append("button");
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return has_in_scope_impl(tag_name, list);
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}
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bool StackOfOpenElements::has_in_table_scope(const FlyString& tag_name) const
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{
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return has_in_scope_impl(tag_name, { "html", "table", "template" });
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}
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bool StackOfOpenElements::has_in_list_item_scope(const FlyString& tag_name) const
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{
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auto list = s_base_list;
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list.append("ol");
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list.append("ul");
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return has_in_scope_impl(tag_name, list);
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}
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bool StackOfOpenElements::has_in_select_scope(const FlyString& tag_name) const
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{
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return has_in_scope_impl(tag_name, { "option", "optgroup" });
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}
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bool StackOfOpenElements::contains(const DOM::Element& element) const
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{
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for (auto& element_on_stack : m_elements) {
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if (&element == &element_on_stack)
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return true;
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}
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return false;
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}
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bool StackOfOpenElements::contains(const FlyString& tag_name) const
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{
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for (auto& element_on_stack : m_elements) {
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if (element_on_stack.local_name() == tag_name)
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return true;
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}
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return false;
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}
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void StackOfOpenElements::pop_until_an_element_with_tag_name_has_been_popped(const FlyString& tag_name)
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{
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while (m_elements.last().local_name() != tag_name)
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(void)pop();
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(void)pop();
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}
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DOM::Element* StackOfOpenElements::topmost_special_node_below(const DOM::Element& formatting_element)
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{
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DOM::Element* found_element = nullptr;
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for (ssize_t i = m_elements.size() - 1; i >= 0; --i) {
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auto& element = m_elements[i];
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if (&element == &formatting_element)
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break;
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if (HTMLParser::is_special_tag(element.local_name(), element.namespace_()))
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found_element = &element;
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}
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return found_element;
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}
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StackOfOpenElements::LastElementResult StackOfOpenElements::last_element_with_tag_name(const FlyString& tag_name)
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{
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for (ssize_t i = m_elements.size() - 1; i >= 0; --i) {
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auto& element = m_elements[i];
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if (element.local_name() == tag_name)
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return { &element, i };
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}
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return { nullptr, -1 };
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}
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DOM::Element* StackOfOpenElements::element_immediately_above(DOM::Element const& target)
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{
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bool found_target = false;
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for (ssize_t i = m_elements.size() - 1; i >= 0; --i) {
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auto& element = m_elements[i];
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if (&element == &target) {
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found_target = true;
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} else if (found_target)
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return &element;
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}
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return nullptr;
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}
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}
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