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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Messaging Framework.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qmailpluginmanager.h"
#include <QMap>
#include <QPluginLoader>
#include <QDir>
#include <QtDebug>
#include <QCoreApplication>
#include <qmailnamespace.h>
/*!
\class QMailPluginManager
\brief The QMailPluginManager class is a helper class that simplifies plug-in loading
for the Messaging framework.
The list() function returns a list of available plugins in the subdirectory specified in the constructor.
In order to load a plugin, call the instance() function with the
name of the plugin to load. qobject_cast() may then be used to query
for the desired interface.
*/
/*!
\fn QMailPluginManager::QMailPluginManager(const QString& dir, QObject* parent)
Creates a QMailPluginManager for plugins located in the plugin subdirectory \a dir with the given
\a parent.
*/
/*!
\fn QMailPluginManager::~QMailPluginManager()
Destroys the QMailPluginManager and releases any resources allocated by
the PluginManager.
*/
/*!
\fn QStringList QMailPluginManager::list() const
Returns the list of plugins that are available in the plugin subdirectory.
*/
/*!
\fn QObject* QMailPluginManager::instance(const QString& name)
Load the plug-in specified by \a name.
Returns the plugin interface if found, otherwise 0.
\code
QObject *instance = pluginManager->instance("name");
if (instance) {
EffectsInterface *iface = 0;
iface = qobject_cast<EffectsInterface*>(instance);
if (iface) {
// We have an instance of the desired type.
}
}
\endcode
*/
namespace {
QStringList pluginFilePatterns()
{
#ifdef LOAD_DEBUG_VERSION
QString debugSuffix("d");
#else
QString debugSuffix;
#endif
#if defined(Q_OS_WIN)
return QStringList() << QString("*%1.dll").arg(debugSuffix) << QString("*%1.DLL").arg(debugSuffix);
#elif defined(Q_OS_MAC)
return QStringList() << "*.dylib";
#else
return QStringList() << QString("*%1.so*").arg(debugSuffix);
#endif
}
}
class QMailPluginManagerPrivate
{
public:
QMailPluginManagerPrivate(const QString& ident);
~QMailPluginManagerPrivate();
public:
QMap<QString,QPluginLoader*> pluginMap;
};
QMailPluginManagerPrivate::QMailPluginManagerPrivate(const QString& path)
{
QStringList libraryPaths;
QStringList coreLibraryPaths = QCoreApplication::libraryPaths();
libraryPaths.append(coreLibraryPaths);
foreach(QString libraryPath, libraryPaths) {
QDir dir(libraryPath);
//Change into the sub directory, and make sure it's readable
if(!dir.cd(path) || !dir.isReadable())
continue;
foreach(const QString &libname, dir.entryList(pluginFilePatterns(), QDir::Files)) {
QString libfile = dir.absoluteFilePath(libname);
if(pluginMap.contains(libname))
pluginMap[libname]->setFileName(libfile);
else
pluginMap[libname] = new QPluginLoader(libfile);
}
}
}
QMailPluginManagerPrivate::~QMailPluginManagerPrivate()
{
foreach (QPluginLoader *lib, pluginMap.values()) {
delete lib;
}
}
QMailPluginManager::QMailPluginManager(const QString& dir, QObject* parent)
:
QObject(parent),
d(new QMailPluginManagerPrivate(dir))
{
}
QMailPluginManager::~QMailPluginManager()
{
delete d; d = 0;
}
QStringList QMailPluginManager::list() const
{
return d->pluginMap.keys();
}
QObject* QMailPluginManager::instance(const QString& name)
{
if (d->pluginMap.contains(name)) {
if(d->pluginMap[name]->load()) {
return d->pluginMap[name]->instance();
} else {
qWarning() << "Error loading" << name << "with errorString()" << d->pluginMap[name]->errorString();
return 0;
}
} else {
qWarning() << "Could not find" << name << "to load";
return 0;
}
}
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