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**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
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** This file is part of Qt Creator.
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** 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
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****************************************************************************/

#ifndef PLUGINMANAGER_P_H
#define PLUGINMANAGER_P_H

#include "pluginspec.h"

#include <QSet>
#include <QStringList>
#include <QObject>
#include <QScopedPointer>
#include <QReadWriteLock>

QT_BEGIN_NAMESPACE
class QTime;
class QTimer;
class QSettings;
class QEventLoop;
QT_END_NAMESPACE

namespace ExtensionSystem {

class PluginManager;
class PluginCollection;

namespace Internal {

class PluginSpecPrivate;

class EXTENSIONSYSTEM_EXPORT PluginManagerPrivate : QObject
{
    Q_OBJECT
public:
    PluginManagerPrivate(PluginManager *pluginManager);
    virtual ~PluginManagerPrivate();

    // Object pool operations
    void addObject(QObject *obj);
    void removeObject(QObject *obj);

    // Plugin operations
    void loadPlugins();
    void shutdown();
    void setPluginPaths(const QStringList &paths);
    QList<PluginSpec *> loadQueue();
    void loadPlugin(PluginSpec *spec, PluginSpec::State destState);
    void resolveDependencies();
    void initProfiling();
    void profilingSummary() const;
    void profilingReport(const char *what, const PluginSpec *spec = 0);
    void setSettings(QSettings *settings);
    void setGlobalSettings(QSettings *settings);
    void readSettings();
    void writeSettings();
    void disablePluginIndirectly(PluginSpec *spec);

    class TestSpec {
    public:
        TestSpec(PluginSpec *pluginSpec, const QStringList &testFunctions = QStringList())
            : pluginSpec(pluginSpec), testFunctions(testFunctions) {}
        PluginSpec *pluginSpec;
        QStringList testFunctions;
    };

    bool containsTestSpec(PluginSpec *pluginSpec) const
    {
        foreach (const TestSpec &testSpec, testSpecs) {
            if (testSpec.pluginSpec == pluginSpec)
                return true;
        }
        return false;
    }

    QHash<QString, PluginCollection *> pluginCategories;
    QList<PluginSpec *> pluginSpecs;
    QList<TestSpec> testSpecs;
    QStringList pluginPaths;
    QString extension;
    QList<QObject *> allObjects; // ### make this a QList<QPointer<QObject> > > ?
    QStringList defaultDisabledPlugins; // Plugins/Ignored from install settings
    QStringList defaultEnabledPlugins; // Plugins/ForceEnabled from install settings
    QStringList disabledPlugins;
    QStringList forceEnabledPlugins;
    // delayed initialization
    QTimer *delayedInitializeTimer;
    QList<PluginSpec *> delayedInitializeQueue;
    // ansynchronous shutdown
    QList<PluginSpec *> asynchronousPlugins; // plugins that have requested async shutdown
    QEventLoop *shutdownEventLoop; // used for async shutdown

    QStringList arguments;
    QScopedPointer<QTime> m_profileTimer;
    QHash<const PluginSpec *, int> m_profileTotal;
    int m_profileElapsedMS;
    unsigned m_profilingVerbosity;
    QSettings *settings;
    QSettings *globalSettings;

    // Look in argument descriptions of the specs for the option.
    PluginSpec *pluginForOption(const QString &option, bool *requiresArgument) const;
    PluginSpec *pluginByName(const QString &name) const;

    // used by tests
    static PluginSpec *createSpec();
    static PluginSpecPrivate *privateSpec(PluginSpec *spec);

    mutable QReadWriteLock m_lock;

private slots:
    void nextDelayedInitialize();
    void asyncShutdownFinished();

private:
    PluginCollection *defaultCollection;
    PluginManager *q;

    void readPluginPaths();
    bool loadQueue(PluginSpec *spec,
            QList<PluginSpec *> &queue,
            QList<PluginSpec *> &circularityCheckQueue);
    void stopAll();
    void deleteAll();
};

} // namespace Internal
} // namespace ExtensionSystem

#endif // PLUGINMANAGER_P_H
