/*
  codeeditor.h

  This file is part of GammaRay, the Qt application inspection and
  manipulation tool.

  Copyright (C) 2016-2017 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com
  Author: Volker Krause <volker.krause@kdab.com>

  Licensees holding valid commercial KDAB GammaRay licenses may use this file in
  accordance with GammaRay Commercial License Agreement provided with the Software.

  Contact info@kdab.com if any conditions of this licensing are not clear to you.

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef GAMMARAY_CODEEDITOR_H
#define GAMMARAY_CODEEDITOR_H

#include "gammaray_ui_export.h"

#include <config-gammaray.h>

#include <QPlainTextEdit>

namespace KSyntaxHighlighting {
class Repository;
class SyntaxHighlighter;
}

namespace GammaRay {

class CodeEditorSidebar;

class GAMMARAY_UI_EXPORT CodeEditor : public QPlainTextEdit
{
    Q_OBJECT
public:
    explicit CodeEditor(QWidget *parent = nullptr);
    ~CodeEditor();

    void setFileName(const QString &fileName);
    void setSyntaxDefinition(const QString &syntaxName);

protected:
    void contextMenuEvent(QContextMenuEvent *event) override;
    void resizeEvent(QResizeEvent *event) override;

private slots:
    void updateSidebarGeometry();
    void updateSidebarArea(const QRect &rect, int dy);
    void highlightCurrentLine();
    void syntaxSelected(QAction *action);

private:
    friend class CodeEditorSidebar;
    int sidebarWidth() const;
    int foldingBarWidth() const;
    void sidebarPaintEvent(QPaintEvent *event);
    void ensureHighlighterExists();

    QTextBlock blockAtPosition(int y) const;
    bool isFoldable(const QTextBlock &block) const;
    bool isFolded(const QTextBlock &block) const;
    void toggleFold(const QTextBlock &block);

    static KSyntaxHighlighting::Repository *s_repository;

    CodeEditorSidebar *m_sideBar;
    KSyntaxHighlighting::SyntaxHighlighter *m_highlighter;
};
}

#endif // GAMMARAY_CODEEDITOR_H
