/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Virtual Keyboard module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
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** accordance with the commercial license agreement provided with the
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
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****************************************************************************/

#ifndef SHIFTHANDLER_H
#define SHIFTHANDLER_H

#include <QObject>

namespace QtVirtualKeyboard {

class InputContext;
class ShiftHandlerPrivate;

class ShiftHandler : public QObject
{
    Q_OBJECT
    Q_DISABLE_COPY(ShiftHandler)
    Q_DECLARE_PRIVATE(ShiftHandler)
    Q_PROPERTY(QString sentenceEndingCharacters READ sentenceEndingCharacters WRITE setSentenceEndingCharacters NOTIFY sentenceEndingCharactersChanged)
    Q_PROPERTY(bool autoCapitalizationEnabled READ autoCapitalizationEnabled NOTIFY autoCapitalizationEnabledChanged)
    Q_PROPERTY(bool toggleShiftEnabled READ toggleShiftEnabled NOTIFY toggleShiftEnabledChanged)

    explicit ShiftHandler(InputContext *parent = 0);

public:
    ~ShiftHandler();

    QString sentenceEndingCharacters() const;
    void setSentenceEndingCharacters(const QString &value);
    bool autoCapitalizationEnabled() const;
    bool toggleShiftEnabled() const;

    Q_INVOKABLE void toggleShift();
    Q_INVOKABLE void clearToggleShiftTimer();

signals:
    void sentenceEndingCharactersChanged();
    void toggleShiftEnabledChanged();
    void autoCapitalizationEnabledChanged();

private slots:
    void reset();
    void autoCapitalize();
    void restart();
    void localeChanged();
    void shiftChanged();
    void inputMethodVisibleChanged();

private:
    void setAutoCapitalizationEnabled(bool enabled);
    void setToggleShiftEnabled(bool enabled);

private:
    friend class InputContext;
};

} // namespace QtVirtualKeyboard

#endif // SHIFTHANDLER_H