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/*
* PluginFactory.h
*
* Copyright (c) 2015 Lukas W <lukaswhl/at/gmail.com>
*
* This file is part of LMMS - https://lmms.io
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program (see COPYING); if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
*/
#ifndef PLUGINFACTORY_H
#define PLUGINFACTORY_H
#include <memory>
#include <QtCore/QFileInfo>
#include <QtCore/QHash>
#include <QtCore/QList>
#include "export.h"
#include "Plugin.h"
class QLibrary;
class EXPORT PluginFactory
{
public:
struct PluginInfo
{
PluginInfo() : library(nullptr), descriptor(nullptr) {}
const QString name() const;
QFileInfo file;
std::shared_ptr<QLibrary> library;
Plugin::Descriptor* descriptor;
bool isNull() const {return ! library;}
};
typedef QList<PluginInfo> PluginInfoList;
typedef QMultiMap<Plugin::PluginTypes, Plugin::Descriptor*> DescriptorMap;
PluginFactory();
~PluginFactory();
/// Returns the singleton instance of PluginFactory. You won't need to call
/// this directly, use pluginFactory instead.
static PluginFactory* instance();
/// Returns a list of all found plugins' descriptors.
const Plugin::DescriptorList descriptors() const;
const Plugin::DescriptorList descriptors(Plugin::PluginTypes type) const;
/// Returns a list of all found plugins' PluginFactory::PluginInfo objects.
const PluginInfoList& pluginInfos() const;
/// Returns a plugin that support the given file extension
const PluginInfo pluginSupportingExtension(const QString& ext);
/// Returns the PluginInfo object of the plugin with the given name.
/// If the plugin is not found, an empty PluginInfo is returned (use
/// PluginInfo::isNull() to check this).
const PluginInfo pluginInfo(const char* name) const;
/// When loading a library fails during discovery, the error string is saved.
/// It can be retrieved by calling this function.
QString errorString(QString pluginName) const;
public slots:
void discoverPlugins();
private:
DescriptorMap m_descriptors;
PluginInfoList m_pluginInfos;
QMap<QString, PluginInfo> m_pluginByExt;
QHash<QString, QString> m_errors;
static std::unique_ptr<PluginFactory> s_instance;
};
#define pluginFactory PluginFactory::instance()
#endif // PLUGINFACTORY_H
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