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/*
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/StringBuilder.h>
#include <LibMarkdown/List.h>
namespace Markdown {
String List::render_to_html() const
{
StringBuilder builder;
const char* tag = m_is_ordered ? "ol" : "ul";
builder.appendff("<{}>", tag);
for (auto& item : m_items) {
builder.append("<li>");
builder.append(item.render_to_html());
builder.append("</li>\n");
}
builder.appendff("</{}>\n", tag);
return builder.build();
}
String List::render_for_terminal(size_t) const
{
StringBuilder builder;
int i = 0;
for (auto& item : m_items) {
builder.append(" ");
if (m_is_ordered)
builder.appendff("{}. ", ++i);
else
builder.append("* ");
builder.append(item.render_for_terminal());
builder.append("\n");
}
builder.append("\n");
return builder.build();
}
OwnPtr<List> List::parse(Vector<StringView>::ConstIterator& lines)
{
Vector<Text> items;
bool is_ordered = false;
bool first = true;
size_t offset = 0;
StringBuilder item_builder;
auto flush_item_if_needed = [&] {
if (first)
return true;
auto text = Text::parse(item_builder.string_view());
if (!text.has_value())
return false;
items.append(move(text.value()));
item_builder.clear();
return true;
};
while (true) {
if (lines.is_end())
break;
const StringView& line = *lines;
if (line.is_empty())
break;
bool appears_unordered = false;
if (line.length() > 2) {
if (line[1] == ' ' && (line[0] == '*' || line[0] == '-')) {
appears_unordered = true;
offset = 2;
}
}
bool appears_ordered = false;
for (size_t i = 0; i < 10 && i < line.length(); i++) {
char ch = line[i];
if ('0' <= ch && ch <= '9')
continue;
if (ch == '.' || ch == ')')
if (i + 1 < line.length() && line[i + 1] == ' ') {
appears_ordered = true;
offset = i + 1;
}
break;
}
VERIFY(!(appears_unordered && appears_ordered));
if (appears_unordered || appears_ordered) {
if (first)
is_ordered = appears_ordered;
else if (is_ordered != appears_ordered)
return {};
if (!flush_item_if_needed())
return {};
while (offset + 1 < line.length() && line[offset + 1] == ' ')
offset++;
} else {
if (first)
return {};
for (size_t i = 0; i < offset; i++) {
if (line[i] != ' ')
return {};
}
}
first = false;
if (!item_builder.is_empty())
item_builder.append(' ');
VERIFY(offset <= line.length());
item_builder.append(line.substring_view(offset, line.length() - offset));
++lines;
offset = 0;
}
if (!flush_item_if_needed() || first)
return {};
return make<List>(move(items), is_ordered);
}
}
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