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/*
* Copyright (c) 2021, Peter Elliott <pelliott@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Format.h>
#include <LibMarkdown/LineIterator.h>
namespace Markdown {
void LineIterator::reset_ignore_prefix()
{
for (auto& context : m_context_stack) {
context.ignore_prefix = false;
}
}
Optional<StringView> LineIterator::match_context(StringView line) const
{
bool is_ws = line.is_whitespace();
size_t offset = 0;
for (auto& context : m_context_stack) {
switch (context.type) {
case Context::Type::ListItem:
if (is_ws)
break;
if (offset + context.indent > line.length())
return {};
if (!context.ignore_prefix && !line.substring_view(offset, context.indent).is_whitespace())
return {};
offset += context.indent;
break;
case Context::Type::BlockQuote:
for (; offset < line.length() && line[offset] == ' '; ++offset) { }
if (offset >= line.length() || line[offset] != '>') {
return {};
}
++offset;
break;
}
if (offset > line.length())
return {};
}
return line.substring_view(offset);
}
bool LineIterator::is_end() const
{
return m_iterator.is_end() || !match_context(*m_iterator).has_value();
}
StringView LineIterator::operator*() const
{
auto line = match_context(*m_iterator);
VERIFY(line.has_value());
return line.value();
}
}
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