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/* This file is part of the KDE project
Copyright (C) 1999 Simon Hausmann <hausmann@kde.org>
(C) 1999 David Faure <faure@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef PLUGIN_H
#define PLUGIN_H
#include <qobject.h>
#include <kaction.h>
#include <kxmlguiclient.h>
class KInstance;
namespace KParts
{
/**
* A plugin is the way to add actions to an existing KParts application,
* or to a Part.
*
* The XML of those plugins looks exactly like of the shell or parts,
* with one small difference: The document tag should have an additional
* attribute, named "library", and contain the name of the library implementing
* the plugin.
*
* If you want this plugin to be used by a part, you need to
* install the rc file under the directory
* "data" (KDEDIR/share/apps usually)+"/instancename/kpartplugins/"
* where instancename is the name of the part's instance.
*
* You should also install a "plugin info" .desktop file with the same name.
* \see PluginInfo
*/
class KPARTS_EXPORT Plugin : public QObject, virtual public KXMLGUIClient
{
Q_OBJECT
public:
/**
* Struct holding information about a plugin
*/
struct PluginInfo
{
QString m_relXMLFileName; ///< relative filename, i.e. kpartplugins/name
QString m_absXMLFileName; ///< full path of most recent filename matching the relative filename
QDomDocument m_document;
};
/**
* Construct a new KParts plugin.
*/
Plugin( QObject* parent = 0, const char* name = 0 );
/**
* Destructor.
*/
virtual ~Plugin();
/**
* Reimplemented for internal reasons
*/
virtual QString xmlFile() const;
/**
* Reimplemented for internal reasons
*/
virtual QString localXMLFile() const;
/**
* Load the plugin libraries from the directories appropriate
* to @p instance and make the Plugin objects children of @p parent.
*
* It is recommended to use the last loadPlugins method instead,
* to support enabling and disabling of plugins.
*/
static void loadPlugins( QObject *parent, const KInstance * instance );
/**
* Load the plugin libraries specified by the list @p docs and make the
* Plugin objects children of @p parent .
*
* It is recommended to use the last loadPlugins method instead,
* to support enabling and disabling of plugins.
*/
static void loadPlugins( QObject *parent, const QValueList<PluginInfo> &pluginInfos );
/**
* Load the plugin libraries specified by the list @p pluginInfos, make the
* Plugin objects children of @p parent, and use the given @p instance.
*
* It is recommended to use the last loadPlugins method instead,
* to support enabling and disabling of plugins.
*/
static void loadPlugins( QObject *parent, const QValueList<PluginInfo> &pluginInfos, const KInstance * instance );
/**
* Load the plugin libraries for the given @p instance, make the
* Plugin objects children of @p parent, and insert the plugin as a child GUI client
* of @p parentGUIClient.
*
* This method uses the KConfig object of the given instance, to find out which
* plugins are enabled and which are disabled. What happens by default (i.e.
* for new plugins that are not in that config file) is controlled by
* @p enableNewPluginsByDefault. It can be overridden by the plugin if it
* sets the X-KDE-PluginInfo-EnabledByDefault key in the .desktop file
* (with the same name as the .rc file)
*
* If a disabled plugin is already loaded it will be removed from the GUI
* factory and deleted.
*
* This method is automatically called by KParts::Plugin and by KParts::MainWindow.
*
* If you call this method in an already constructed GUI (like when the user
* has changed which plugins are enabled) you need to add the new plugins to
* the KXMLGUIFactory:
* \code
* if( factory() )
* {
* QPtrList<KParts::Plugin> plugins = KParts::Plugin::pluginObjects( this );
* QPtrListIterator<KParts::Plugin> it( plugins );
* KParts::Plugin * plugin;
* while( ( plugin = it.current() ) != 0 )
* {
* ++it;
* factory()->addClient( plugin );
* }
* }
* \endcode
*/
static void loadPlugins( QObject *parent, KXMLGUIClient* parentGUIClient, KInstance* instance, bool enableNewPluginsByDefault = true );
/**
* Returns a list of plugin objects loaded for @p parent. This
* functions basically calls the queryList method of
* QObject to retrieve the list of child objects inheriting
* KParts::Plugin .
**/
static QPtrList<Plugin> pluginObjects( QObject *parent );
protected:
/**
* Look for plugins in the @p instance's "data" directory (+"/kpartplugins")
*
* @return A list of QDomDocument s, containing the parsed xml documents returned by plugins.
*/
static QValueList<Plugin::PluginInfo> pluginInfos( const KInstance * instance );
/**
* @internal
* @return The plugin created from the library @p libname
*/
static Plugin* loadPlugin( QObject * parent, const char* libname );
virtual void setInstance( KInstance *instance );
private:
static bool hasPlugin( QObject* parent, const QString& library );
class PluginPrivate;
PluginPrivate *d;
};
}
#endif
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