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** Copyright (C) 2016 The Qt Company Ltd.
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** GNU General Public License Usage
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** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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#pragma once

#include "texteditor_global.h"

#include "tabsettings.h"

#include <QMap>

QT_BEGIN_NAMESPACE
class QTextDocument;
class QTextCursor;
class QTextBlock;
class QChar;
QT_END_NAMESPACE

namespace TextEditor {

class ICodeStylePreferences;
class TabSettings;

using IndentationForBlock = QMap<int, int>;

class TEXTEDITOR_EXPORT Indenter
{
public:
    Indenter();
    virtual ~Indenter();

    // Returns true if key triggers an indent.
    virtual bool isElectricCharacter(const QChar &ch) const;

    // Indent a text block based on previous line. Default does nothing
    virtual void indentBlock(QTextDocument *doc,
                             const QTextBlock &block,
                             const QChar &typedChar,
                             const TabSettings &tabSettings);

    // Indent at cursor. Calls indentBlock for selection or current line.
    virtual void indent(QTextDocument *doc,
                        const QTextCursor &cursor,
                        const QChar &typedChar,
                        const TabSettings &tabSettings,
                        bool autoTriggered = true);

    // By default just calls indent with default settings.
    virtual void format(QTextDocument *doc,
                        const QTextCursor &cursor,
                        const TabSettings &tabSettings);

    // Reindent at cursor. Selection will be adjusted according to the indentation
    // change of the first block.
    virtual void reindent(QTextDocument *doc, const QTextCursor &cursor, const TabSettings &tabSettings);

    virtual void setCodeStylePreferences(ICodeStylePreferences *preferences);

    virtual void invalidateCache(QTextDocument *doc);

    virtual int indentFor(const QTextBlock &block, const TextEditor::TabSettings &tabSettings);

    // Expects a list of blocks in order of occurrence in the document.
    virtual IndentationForBlock indentationForBlocks(const QVector<QTextBlock> &blocks,
                                                     const TextEditor::TabSettings &tabSettings);

    virtual bool hasTabSettings() const { return false; }
    virtual TabSettings tabSettings() const { return TabSettings(); }
};

} // namespace TextEditor
