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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 269 insertions, 0 deletions

diff --git a/src/corelib/plugin/qfactoryloader.cpp b/src/corelib/plugin/qfactoryloader.cpp
new file mode 100644
index 0000000000..c0b947ad19
--- /dev/null
+++ b/src/corelib/plugin/qfactoryloader.cpp
@@ -0,0 +1,269 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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"
+
+#ifndef QT_NO_LIBRARY
+#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) {
+                    library->release();
+                    // 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;
+}
+
+#ifdef Q_WS_X11
+QLibraryPrivate *QFactoryLoader::library(const QString &key) const
+{
+    Q_D(const QFactoryLoader);
+    return d->keyMap.value(d->cs ? key : key.toLower());
+}
+#endif
+
+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