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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qfactoryloader_p.h"
#if !defined (QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)
#include "qfactoryinterface.h"
#include "qmap.h"
#include <qdir.h>
#include <qsettings.h>
#include <qdebug.h>
#include "qmutex.h"
#include "qplugin.h"
#include "qpluginloader.h"
#include "private/qobject_p.h"
#include "private/qcoreapplication_p.h"
QT_BEGIN_NAMESPACE
Q_GLOBAL_STATIC(QList<QFactoryLoader *>, qt_factory_loaders)
Q_GLOBAL_STATIC_WITH_ARGS(QMutex, qt_factoryloader_mutex, (QMutex::Recursive))
class QFactoryLoaderPrivate : public QObjectPrivate
{
Q_DECLARE_PUBLIC(QFactoryLoader)
public:
QFactoryLoaderPrivate(){}
~QFactoryLoaderPrivate();
mutable QMutex mutex;
QByteArray iid;
QList<QLibraryPrivate*> libraryList;
QMap<QString,QLibraryPrivate*> keyMap;
QStringList keyList;
QString suffix;
Qt::CaseSensitivity cs;
QStringList loadedPaths;
void unloadPath(const QString &path);
};
QFactoryLoaderPrivate::~QFactoryLoaderPrivate()
{
for (int i = 0; i < libraryList.count(); ++i)
libraryList.at(i)->release();
}
QFactoryLoader::QFactoryLoader(const char *iid,
const QString &suffix,
Qt::CaseSensitivity cs)
: QObject(*new QFactoryLoaderPrivate)
{
moveToThread(QCoreApplicationPrivate::mainThread());
Q_D(QFactoryLoader);
d->iid = iid;
d->cs = cs;
d->suffix = suffix;
QMutexLocker locker(qt_factoryloader_mutex());
update();
qt_factory_loaders()->append(this);
}
void QFactoryLoader::update()
{
#ifdef QT_SHARED
Q_D(QFactoryLoader);
QStringList paths = QCoreApplication::libraryPaths();
QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));
for (int i = 0; i < paths.count(); ++i) {
const QString &pluginDir = paths.at(i);
// Already loaded, skip it...
if (d->loadedPaths.contains(pluginDir))
continue;
d->loadedPaths << pluginDir;
QString path = pluginDir + d->suffix;
if (!QDir(path).exists(QLatin1String(".")))
continue;
QStringList plugins = QDir(path).entryList(QDir::Files);
QLibraryPrivate *library = 0;
for (int j = 0; j < plugins.count(); ++j) {
QString fileName = QDir::cleanPath(path + QLatin1Char('/') + plugins.at(j));
if (qt_debug_component()) {
qDebug() << "QFactoryLoader::QFactoryLoader() looking at" << fileName;
}
library = QLibraryPrivate::findOrCreate(QFileInfo(fileName).canonicalFilePath());
if (!library->isPlugin(&settings)) {
if (qt_debug_component()) {
qDebug() << library->errorString;
qDebug() << " not a plugin";
}
library->release();
continue;
}
QString regkey = QString::fromLatin1("Qt Factory Cache %1.%2/%3:/%4")
.arg((QT_VERSION & 0xff0000) >> 16)
.arg((QT_VERSION & 0xff00) >> 8)
.arg(QLatin1String(d->iid))
.arg(fileName);
QStringList reg, keys;
reg = settings.value(regkey).toStringList();
if (reg.count() && library->lastModified == reg[0]) {
keys = reg;
keys.removeFirst();
} else {
if (!library->loadPlugin()) {
if (qt_debug_component()) {
qDebug() << library->errorString;
qDebug() << " could not load";
}
library->release();
continue;
}
QObject *instance = library->instance();
if (!instance)
// ignore plugins that have a valid signature but cannot be loaded.
continue;
QFactoryInterface *factory = qobject_cast<QFactoryInterface*>(instance);
if (instance && factory && instance->qt_metacast(d->iid))
keys = factory->keys();
if (keys.isEmpty())
library->unload();
reg.clear();
reg << library->lastModified;
reg += keys;
settings.setValue(regkey, reg);
}
if (qt_debug_component()) {
qDebug() << "keys" << keys;
}
if (keys.isEmpty()) {
library->release();
continue;
}
d->libraryList += library;
for (int k = 0; k < keys.count(); ++k) {
// first come first serve, unless the first
// library was built with a future Qt version,
// whereas the new one has a Qt version that fits
// better
QString key = keys.at(k);
if (!d->cs)
key = key.toLower();
QLibraryPrivate *previous = d->keyMap.value(key);
if (!previous || (previous->qt_version > QT_VERSION && library->qt_version <= QT_VERSION)) {
d->keyMap[key] = library;
d->keyList += keys.at(k);
}
}
}
}
#else
Q_D(QFactoryLoader);
if (qt_debug_component()) {
qDebug() << "QFactoryLoader::QFactoryLoader() ignoring" << d->iid
<< "since plugins are disabled in static builds";
}
#endif
}
QFactoryLoader::~QFactoryLoader()
{
QMutexLocker locker(qt_factoryloader_mutex());
qt_factory_loaders()->removeAll(this);
}
QStringList QFactoryLoader::keys() const
{
Q_D(const QFactoryLoader);
QMutexLocker locker(&d->mutex);
QStringList keys = d->keyList;
QObjectList instances = QPluginLoader::staticInstances();
for (int i = 0; i < instances.count(); ++i)
if (QFactoryInterface *factory = qobject_cast<QFactoryInterface*>(instances.at(i)))
if (instances.at(i)->qt_metacast(d->iid))
keys += factory->keys();
return keys;
}
QObject *QFactoryLoader::instance(const QString &key) const
{
Q_D(const QFactoryLoader);
QMutexLocker locker(&d->mutex);
QObjectList instances = QPluginLoader::staticInstances();
for (int i = 0; i < instances.count(); ++i)
if (QFactoryInterface *factory = qobject_cast<QFactoryInterface*>(instances.at(i)))
if (instances.at(i)->qt_metacast(d->iid) && factory->keys().contains(key, Qt::CaseInsensitive))
return instances.at(i);
QString lowered = d->cs ? key : key.toLower();
if (QLibraryPrivate* library = d->keyMap.value(lowered)) {
if (library->instance || library->loadPlugin()) {
if (QObject *obj = library->instance()) {
if (obj && !obj->parent())
obj->moveToThread(QCoreApplicationPrivate::mainThread());
return obj;
}
}
}
return 0;
}
void QFactoryLoader::refreshAll()
{
QMutexLocker locker(qt_factoryloader_mutex());
QList<QFactoryLoader *> *loaders = qt_factory_loaders();
for (QList<QFactoryLoader *>::const_iterator it = loaders->constBegin();
it != loaders->constEnd(); ++it) {
(*it)->update();
}
}
QT_END_NAMESPACE
#endif // QT_NO_LIBRARY
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