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#ifndef SIDEBYSIDEDIFFEDITORWIDGET_H
#define SIDEBYSIDEDIFFEDITORWIDGET_H

#include "diffeditor_global.h"
#include "differ.h"
#include "diffeditorcontroller.h"
#include <QWidget>
#include <QTextCharFormat>

namespace TextEditor { class FontSettings; }

QT_BEGIN_NAMESPACE
class QSplitter;
QT_END_NAMESPACE


namespace DiffEditor {
class DiffEditorGuiController;
class SideDiffEditorWidget;

namespace Internal {
class ChunkData;
class FileData;
}

class DIFFEDITOR_EXPORT SideBySideDiffEditorWidget : public QWidget
{
    Q_OBJECT
public:
    SideBySideDiffEditorWidget(QWidget *parent = 0);
    ~SideBySideDiffEditorWidget();

    void setDiffEditorGuiController(DiffEditorGuiController *controller);
    DiffEditorGuiController *diffEditorGuiController() const;

private slots:
    void clear(const QString &message = QString());
    void setDiff(const QList<DiffEditorController::DiffFilesContents> &diffFileList, const QString &workingDirectory);

    void setContextLinesNumber(int lines);
    void setIgnoreWhitespaces(bool ignore);
    void setCurrentDiffFileIndex(int diffFileIndex);

    void setFontSettings(const TextEditor::FontSettings &fontSettings);
    void slotLeftJumpToOriginalFileRequested(int diffFileIndex, int lineNumber, int columnNumber);
    void slotRightJumpToOriginalFileRequested(int diffFileIndex, int lineNumber, int columnNumber);
    void leftVSliderChanged();
    void rightVSliderChanged();
    void leftHSliderChanged();
    void rightHSliderChanged();
    void leftCursorPositionChanged();
    void rightCursorPositionChanged();
    void leftDocumentSizeChanged();
    void rightDocumentSizeChanged();

private:
    class DiffList {
    public:
        DiffEditorController::DiffFileInfo leftFileInfo;
        DiffEditorController::DiffFileInfo rightFileInfo;
        QList<Diff> diffList;
    };

    void setDiff(const QList<DiffList> &diffList);
    void handleWhitespaces(const QList<Diff> &input,
                           QList<Diff> *leftOutput,
                           QList<Diff> *rightOutput) const;
    void colorDiff(const QList<Internal::FileData> &fileDataList);
    void showDiff();
    void synchronizeFoldings(SideDiffEditorWidget *source, SideDiffEditorWidget *destination);
    void jumpToOriginalFile(const QString &fileName, int lineNumber, int columnNumber);

    DiffEditorGuiController *m_guiController;
    DiffEditorController *m_controller;
    SideDiffEditorWidget *m_leftEditor;
    SideDiffEditorWidget *m_rightEditor;
    QSplitter *m_splitter;

    QList<DiffList> m_diffList; // list of original outputs from differ
    QList<Internal::ChunkData> m_originalChunkData; // one big chunk for every file, ignoreWhitespace taken into account
    QList<Internal::FileData> m_contextFileData; // ultimate data to be shown, contextLinesNumber taken into account

    bool m_foldingBlocker;

    QTextCharFormat m_fileLineFormat;
    QTextCharFormat m_chunkLineFormat;
    QTextCharFormat m_leftLineFormat;
    QTextCharFormat m_leftCharFormat;
    QTextCharFormat m_rightLineFormat;
    QTextCharFormat m_rightCharFormat;
};

} // namespace DiffEditor

#endif // SIDEBYSIDEDIFFEDITORWIDGET_H