MultiMC5/application/HoeDown.h

/* Copyright 2013-2019 MultiMC Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once
#include <hoedown/html.h>
#include <hoedown/document.h>
#include <QString>
#include <QByteArray>

/**
 * hoedown wrapper, because dealing with resource lifetime in C is stupid
 */
class HoeDown
{
public:
    class buffer
    {
    public:
        buffer(size_t unit = 4096)
        {
            buf = hoedown_buffer_new(unit);
        }
        ~buffer()
        {
            hoedown_buffer_free(buf);
        }
        const char * cstr()
        {
            return hoedown_buffer_cstr(buf);
        }
        void put(QByteArray input)
        {
            hoedown_buffer_put(buf, (uint8_t *) input.data(), input.size());
        }
        const uint8_t * data() const
        {
            return buf->data;
        }
        size_t size() const
        {
            return buf->size;
        }
        hoedown_buffer * buf;
    } ib, ob;
    HoeDown()
    {
        renderer = hoedown_html_renderer_new((hoedown_html_flags) 0,0);
        document = hoedown_document_new(renderer, (hoedown_extensions) 0, 8);
    }
    ~HoeDown()
    {
        hoedown_document_free(document);
        hoedown_html_renderer_free(renderer);
    }
    QString process(QByteArray input)
    {
        ib.put(input);
        hoedown_document_render(document, ob.buf, ib.data(), ib.size());
        return ob.cstr();
    }
private:
    hoedown_document * document;
    hoedown_renderer * renderer;
};