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**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
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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
** ensure the GNU Lesser General Public License version 2.1 requirements
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****************************************************************************/

#ifndef LOGCHANGEDDIALOG_H
#define LOGCHANGEDDIALOG_H

#include <QDialog>
#include <QIcon>
#include <QStyledItemDelegate>
#include <QTreeView>

QT_BEGIN_NAMESPACE
class QDialogButtonBox;
class QComboBox;
class QStandardItemModel;
class QStandardItem;
QT_END_NAMESPACE

namespace Git {
namespace Internal {

// A widget that lists SHA1 and subject of the changes
// Used for reset and interactive rebase

class LogChangeWidget : public QTreeView
{
    Q_OBJECT

public:
    enum LogFlag
    {
        None = 0x00,
        IncludeRemotes = 0x01,
        Silent = 0x02
    };

    Q_DECLARE_FLAGS(LogFlags, LogFlag)

    explicit LogChangeWidget(QWidget *parent = 0);
    bool init(const QString &repository, const QString &commit = QString(), LogFlags flags = None);
    QString commit() const;
    int commitIndex() const;
    QString earliestCommit() const;
    void setItemDelegate(QAbstractItemDelegate *delegate);

signals:
    void doubleClicked(const QString &commit);

private slots:
    void emitDoubleClicked(const QModelIndex &index);

private:
    void selectionChanged(const QItemSelection &selected, const QItemSelection &deselected);
    bool populateLog(const QString &repository, const QString &commit, LogFlags flags);
    const QStandardItem *currentItem(int column = 0) const;

    QStandardItemModel *m_model;
    bool m_hasCustomDelegate;
};

class LogChangeDialog : public QDialog
{
    Q_OBJECT

public:
    LogChangeDialog(bool isReset, QWidget *parent);

    bool runDialog(const QString &repository, const QString &commit = QString(),
                   LogChangeWidget::LogFlags flags = LogChangeWidget::None);

    QString commit() const;
    int commitIndex() const;
    QString resetFlag() const;
    LogChangeWidget *widget() const;

private:
    LogChangeWidget *m_widget;
    QDialogButtonBox *m_dialogButtonBox;
    QComboBox *m_resetTypeComboBox;
};

class LogItemDelegate : public QStyledItemDelegate
{
protected:
    LogItemDelegate(LogChangeWidget *widget);

    int currentRow() const;

private:
    LogChangeWidget *m_widget;
};

class IconItemDelegate : public LogItemDelegate
{
public:
    IconItemDelegate(LogChangeWidget *widget, const QString &icon);

    virtual bool hasIcon(int row) const = 0;

    void paint(QPainter *painter, const QStyleOptionViewItem &option,
               const QModelIndex &index) const;

private:
    QIcon m_icon;
};

} // namespace Internal
} // namespace Git

#endif // LOGCHANGEDDIALOG_H