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** Copyright (C) 2016 The Qt Company Ltd.
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
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#pragma once

#include "ifindsupport.h"

#include <utils/multitextcursor.h>

#include <QRegularExpression>

QT_BEGIN_NAMESPACE
class QPlainTextEdit;
class QTextEdit;
class QTextCursor;
QT_END_NAMESPACE

namespace Core {
struct BaseTextFindPrivate;

class CORE_EXPORT BaseTextFind : public IFindSupport
{
    Q_OBJECT

public:
    explicit BaseTextFind(QPlainTextEdit *editor);
    explicit BaseTextFind(QTextEdit *editor);
    ~BaseTextFind() override;

    bool supportsReplace() const override;
    FindFlags supportedFindFlags() const override;
    void resetIncrementalSearch() override;
    void clearHighlights() override;
    QString currentFindString() const override;
    QString completedFindString() const override;

    Result findIncremental(const QString &txt, FindFlags findFlags) override;
    Result findStep(const QString &txt, FindFlags findFlags) override;
    void replace(const QString &before, const QString &after, FindFlags findFlags) override;
    bool replaceStep(const QString &before, const QString &after, FindFlags findFlags) override;
    int replaceAll(const QString &before, const QString &after, FindFlags findFlags) override;

    void defineFindScope() override;
    void clearFindScope() override;

    void highlightAll(const QString &txt, FindFlags findFlags) override;

    using CursorProvider = std::function<Utils::MultiTextCursor ()>;
    void setMultiTextCursorProvider(const CursorProvider &provider);
    bool inScope(const QTextCursor &candidate) const;

    static QRegularExpression regularExpression(const QString &txt, FindFlags flags);

signals:
    void highlightAllRequested(const QString &txt, Core::FindFlags findFlags);
    void findScopeChanged(const Utils::MultiTextCursor &cursor);

private:
    bool find(const QString &txt, FindFlags findFlags, QTextCursor start, bool *wrapped);
    QTextCursor replaceInternal(const QString &before, const QString &after, FindFlags findFlags);

    Utils::MultiTextCursor multiTextCursor() const;
    QTextCursor textCursor() const;
    void setTextCursor(const QTextCursor&);
    QTextDocument *document() const;
    bool isReadOnly() const;
    QTextCursor findOne(const QRegularExpression &expr, QTextCursor from, QTextDocument::FindFlags options) const;

    BaseTextFindPrivate *d;
};

} // namespace Core
