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/* ksim - a system monitor for kde
*
* Copyright (C) 2001 Robbie Ward <linuxphreak@gmx.co.uk>
*
* 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; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef PLUGINLOADER_H
#define PLUGINLOADER_H
#include "pluginglobal.h"
#include <tqobject.h>
#include <kdemacros.h>
namespace KSim
{
class KDE_EXPORT PluginInfo
{
friend class PluginLoader;
public:
~PluginInfo();
/**
* @return the name of the plugin
*/
const TQString &name() const;
/**
* @return the library name of the plugin
*/
TQCString libName(bool includePrefix = false) const;
/**
* @return the location of the desktop file
*/
const TQString &location() const;
private:
PluginInfo();
TQString m_name;
TQString m_location;
TQCString m_libName;
class Private;
Private *d;
};
/**
* Provides a loader for the plugins
* @author Robbie Ward <linuxphreak@gmx.co.uk>
*/
class KDE_EXPORT PluginLoader : public TQObject
{
Q_OBJECT
friend class MainView;
public:
enum SearchType { Name = 0, DesktopFile, LibName };
enum ErrorCode { EmptyLibName = -3, LibNotFound = -2,
UnSymbols = -1, LibLoaded = 0 };
/**
* @return a reference to the instance
*/
static PluginLoader &self();
/**
* loads a plugin, example:
* <pre>
* KDesktopFile destdefile("/home/user/foo.desktop");
* KSim::PluginLoader::self().loadPlugin(deskFile);
* </pre>
* you can then use @ref pluginList() to access the plugin, view,
* config page and plugin information
* @param file is the desktop file of the lib
* @return true if the plugin is successfully loaded
*/
bool loadPlugin(const KDesktopFile &file);
/**
* unloads a loaded plugin and removes plugin entries from pluginList()
*/
bool unloadPlugin(const TQCString &name);
/**
* unloads all loaded plugins
*/
void unloadAllPlugins();
/**
* convenience function
*
* returns true if info is loaded
*/
bool isLoaded(const KSim::Plugin &info) const;
/**
* returns true if library is loaded
*/
bool isLoaded(const TQCString &library) const;
/**
* finds the plugins desktopfile and returns information
* on the plugin
* @return a KSim::PluginInfo object
* @see KSim::PluginInfo
*/
KSim::PluginInfo findPluginInfo(const TQString &name,
SearchType type = DesktopFile) const;
/**
* looks through the list of loaded plugins and returns
* the one that matches libName, or returns
* KSim::Plugin::null if a plugin could not be found.
*
* if libName does not start with "ksim_" then the function
* will prepend this automatically.
* @return a KSim::Plugin object
* @see KSim::Plugin
*/
KSim::Plugin &find(const TQCString &libName);
/**
* convenience function, see the above function for details.
*/
const KSim::Plugin &find(const TQCString &libName) const;
/**
* equivalent to find(info.libName());
*/
KSim::Plugin &find(const KSim::PluginInfo &info);
/**
* convenience function, see the above function for details.
*/
const KSim::Plugin &find(const KSim::PluginInfo &info) const;
/**
* provides plugin(), view(), config page and plugin information
* @see KSim::Plugin KSim::PluginList
*/
const KSim::PluginList &pluginList() const;
/**
* Overloaded member function, This behaves essentially like
* the above function
*/
KSim::PluginList &pluginList();
/**
* @return a reference to the last plugin loaded (or a null plugin
* if the plugin was unable to load)
*/
const KSim::Plugin &plugin() const;
/**
* Overloaded member function, This behaves essentially like
* the above function
*/
KSim::Plugin &plugin();
signals:
void pluginLoaded(const KSim::Plugin &);
protected:
/**
* constructor for PluginLoader, use self() to get an instance
*/
PluginLoader();
~PluginLoader();
private:
PluginLoader(const PluginLoader &);
PluginLoader &operator=(const PluginLoader &);
/**
* Deletes the instance and cleans up after itself
*/
static void cleanup();
ErrorCode createPlugin(const KDesktopFile &file);
class Private;
Private *d;
static PluginLoader *m_instance;
};
}
#endif
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