ladybird/Libraries/LibGemini/Document.cpp
AnotherTest 013cb76d77 LibGemini: Implement rendering text/gemini documents to HTML
This also sets Content-Type to whatever 'meta' contains on success, to
allow the browser to pick up what the document contains.
2020-05-17 16:35:42 +02:00

112 lines
3.7 KiB
C++

/*
* Copyright (c) 2020, The SerenityOS developers.
* 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 <AK/NonnullRefPtr.h>
#include <AK/String.h>
#include <AK/StringBuilder.h>
#include <AK/Vector.h>
#include <LibGemini/Document.h>
namespace Gemini {
String Document::render_to_html() const
{
StringBuilder html_builder;
html_builder.append("<!DOCTYPE html>\n<html>\n");
html_builder.append("<head>\n<title>");
html_builder.append(m_url.path());
html_builder.append("</title>\n</head>\n");
html_builder.append("<body>\n");
for (auto& line : m_lines) {
html_builder.append(line.render_to_html());
}
html_builder.append("</body>");
html_builder.append("</html>");
return html_builder.build();
}
NonnullRefPtr<Document> Document::parse(const StringView& lines, const URL& url)
{
auto document = adopt(*new Document(url));
document->read_lines(lines);
return document;
}
void Document::read_lines(const StringView& source)
{
auto close_list_if_needed = [&] {
if (m_inside_unordered_list) {
m_inside_unordered_list = false;
m_lines.append(make<Control>(Control::UnorderedListEnd));
}
};
for (auto& line : source.lines()) {
if (line.starts_with("```")) {
close_list_if_needed();
m_inside_preformatted_block = !m_inside_preformatted_block;
if (m_inside_preformatted_block) {
m_lines.append(make<Control>(Control::PreformattedStart));
} else {
m_lines.append(make<Control>(Control::PreformattedEnd));
}
}
if (m_inside_preformatted_block) {
m_lines.append(make<Preformatted>(move(line)));
continue;
}
if (line.starts_with("*")) {
if (!m_inside_unordered_list)
m_lines.append(make<Control>(Control::UnorderedListStart));
m_lines.append(make<UnorderedList>(move(line)));
m_inside_unordered_list = true;
continue;
}
close_list_if_needed();
if (line.starts_with("=>")) {
m_lines.append(make<Link>(move(line), *this));
continue;
}
if (line.starts_with("#")) {
size_t level = 0;
while (line.length() > level && line[level] == '#')
++level;
m_lines.append(make<Heading>(move(line), level));
continue;
}
m_lines.append(make<Text>(move(line)));
}
}
}