/***************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact:  Qt Software Information (qt-info@nokia.com)
**
** 
** Non-Open Source Usage  
** 
** Licensees may use this file in accordance with the Qt Beta Version
** License Agreement, Agreement version 2.2 provided with the Software or,
** alternatively, in accordance with the terms contained in a written
** agreement between you and Nokia.  
** 
** GNU General Public License Usage 
** 
** Alternatively, this file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the packaging
** of this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
**
** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
** http://www.gnu.org/copyleft/gpl.html.
**
** In addition, as a special exception, Nokia gives you certain additional
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***************************************************************************/
#ifndef RUNCONFIGURATION_H
#define RUNCONFIGURATION_H

#include "projectexplorer_export.h"

#include <QtCore/QObject>
#include <QtCore/QMetaType>
#include <QtCore/QPointer>
#include <QtCore/QSharedPointer>

QT_BEGIN_NAMESPACE
class QString;
class QWidget;
QT_END_NAMESPACE

namespace ProjectExplorer {

class Project;
class PersistentSettingsReader;
class PersistentSettingsWriter;

class RunControl;

/* Base class for a run configuration. A run configuration specifies how a
 * project should be run, while the runner (see below) does the actual running.
 *
 * Note that all RunControls and the project hold a shared pointer to the RunConfiguration.
 * That is the lifetime of the RunConfiguration might exceed the life of the project.
 * The user might still have a RunControl running (or output tab of that RunControl open)
 * and yet unloaded the project. 
 * Also a RunConfiguration might be already removed from the list of RunConfigurations 
 * for a project, but stil be runnable via the output tab.
 
*/
class PROJECTEXPLORER_EXPORT RunConfiguration : public QObject
{
    Q_OBJECT
public:
    RunConfiguration(Project *project);
    virtual ~RunConfiguration();
    Project *project() const;

    // The type of this RunConfiguration, e.g. "ProjectExplorer.ApplicationRunConfiguration"
    virtual QString type() const = 0;
    // Name shown to the user
    QString name() const;
    void setName(const QString &name);

    // Returns the widget used to configure this run configuration. Ownership is transferred to the caller
    virtual QWidget *configurationWidget() = 0;

    virtual void save(PersistentSettingsWriter &writer) const;
    virtual void restore(const PersistentSettingsReader &reader);
signals:
    void nameChanged();
private:
    QPointer<Project> m_project;
    QString m_name;
};

/* The run configuration factory is used for restoring run configurations from
 * settings. And used to create new runconfigurations in the "Run Settings" Dialog.
 * For the first case bool canCreate(const QString &type) and 
 * QSharedPointer<RunConfiguration> create(Project *project, QString type) are used.
 * For the second type the functions QStringList canCreate(Project *pro) and
 * QString nameForType(const QString&) are used to generate a list of creatable
 * RunConfigurations, and create(..) is used to create it.
 */
class PROJECTEXPLORER_EXPORT IRunConfigurationFactory : public QObject
{
    Q_OBJECT
public:
    IRunConfigurationFactory();
    virtual ~IRunConfigurationFactory();
    // used to recreate the runConfigurations when restoring settings
    virtual bool canCreate(const QString &type) const = 0;
    // used to show the list of possible additons to a project, returns a list of types
    virtual QStringList canCreate(Project *pro) const = 0;
    // used to translate the types to names to display to the user
    virtual QString nameForType(const QString &type) const = 0;
    virtual QSharedPointer<RunConfiguration> create(Project *project, const QString &type) = 0;
    
};

class PROJECTEXPLORER_EXPORT IRunConfigurationRunner : public QObject
{
    Q_OBJECT
public:
    IRunConfigurationRunner();
    virtual ~IRunConfigurationRunner();
    virtual bool canRun(QSharedPointer<RunConfiguration> runConfiguration, const QString &mode) = 0;
    virtual RunControl* run(QSharedPointer<RunConfiguration> runConfiguration, const QString &mode) = 0;

    virtual QString displayName() const = 0;

    // Returns the widget used to configure this runner. Ownership is transferred to the caller
    virtual QWidget *configurationWidget(QSharedPointer<RunConfiguration> runConfiguration) = 0;
};

/* Each instance of this class represents one item that is run.
 */
class PROJECTEXPLORER_EXPORT RunControl : public QObject {
    Q_OBJECT
public:
    RunControl(QSharedPointer<RunConfiguration> runConfiguration);
    virtual ~RunControl();
    virtual void start() = 0;
    virtual void stop() = 0;
    virtual bool isRunning() const = 0;
    QSharedPointer<RunConfiguration> runConfiguration();
signals:
    void addToOutputWindow(RunControl *, const QString &line);
    void error(RunControl *, const QString &error);
    void started();
    void finished();
public slots:
    void bringApplicationToForeground(qint64 pid);
private slots:
    void bringApplicationToForegroundInternal();

private:
    QSharedPointer<RunConfiguration> m_runConfiguration;

#ifdef Q_OS_MAC
    //these two are used to bring apps in the foreground on Mac
    qint64 m_internalPid;
    int m_foregroundCount;
#endif
};

} // namespace ProjectExplorer

// Allow a RunConfiguration to be stored in a QVariant
Q_DECLARE_METATYPE(ProjectExplorer::RunConfiguration*)

#endif // RUNCONFIGURATION_H