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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER 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.
*/
#include <LibWeb/DOM/Element.h>
#include <LibWeb/Parser/HTMLDocumentParser.h>
#include <LibWeb/Parser/StackOfOpenElements.h>
namespace Web {
static Vector<FlyString> s_base_list { "applet", "caption", "html", "table", "td", "th", "marquee", "object", "template" };
StackOfOpenElements::~StackOfOpenElements()
{
}
bool StackOfOpenElements::has_in_scope_impl(const FlyString& tag_name, const Vector<FlyString>& list) const
{
for (ssize_t i = m_elements.size() - 1; i >= 0; --i) {
auto& node = m_elements.at(i);
if (node.tag_name() == tag_name)
return true;
if (list.contains_slow(node.tag_name()))
return false;
}
ASSERT_NOT_REACHED();
}
bool StackOfOpenElements::has_in_scope(const FlyString& tag_name) const
{
return has_in_scope_impl(tag_name, s_base_list);
}
bool StackOfOpenElements::has_in_scope_impl(const Element& target_node, const Vector<FlyString>& list) const
{
for (ssize_t i = m_elements.size() - 1; i >= 0; --i) {
auto& node = m_elements.at(i);
if (&node == &target_node)
return true;
if (list.contains_slow(node.tag_name()))
return false;
}
ASSERT_NOT_REACHED();
}
bool StackOfOpenElements::has_in_scope(const Element& target_node) const
{
return has_in_scope_impl(target_node, s_base_list);
}
bool StackOfOpenElements::has_in_button_scope(const FlyString& tag_name) const
{
auto list = s_base_list;
list.append("button");
return has_in_scope_impl(tag_name, list);
}
bool StackOfOpenElements::has_in_table_scope(const FlyString& tag_name) const
{
auto list = s_base_list;
list.append("html");
list.append("table");
list.append("template");
return has_in_scope_impl(tag_name, list);
}
bool StackOfOpenElements::has_in_list_item_scope(const FlyString& tag_name) const
{
auto list = s_base_list;
list.append("ol");
list.append("ul");
return has_in_scope_impl(tag_name, list);
}
bool StackOfOpenElements::contains(const Element& element) const
{
for (auto& element_on_stack : m_elements) {
if (&element == &element_on_stack)
return true;
}
return false;
}
void StackOfOpenElements::pop_until_an_element_with_tag_name_has_been_popped(const FlyString& tag_name)
{
while (m_elements.last().tag_name() != tag_name)
pop();
pop();
}
Element* StackOfOpenElements::topmost_special_node_below(const Element& formatting_element)
{
Element* found_element = nullptr;
for (ssize_t i = m_elements.size() - 1; i >= 0; ++i) {
auto& element = m_elements[i];
if (&element == &formatting_element)
break;
if (HTMLDocumentParser::is_special_tag(element.tag_name()))
found_element = &element;
}
return found_element;
}
}
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