#ifndef VEDIT_H
#define VEDIT_H

#include <QTextEdit>
#include <QString>
#include <QPointer>
#include <QVector>
#include <QList>
#include <QColor>
#include "vconstants.h"
#include "vtoc.h"
#include "vfile.h"

class VEditOperations;
class QLabel;
class QTimer;

enum class SelectionId {
    CurrentLine = 0,
    SelectedWord,
    SearchedKeyword,
    MaxSelection
};

class VEdit : public QTextEdit
{
    Q_OBJECT
public:
    VEdit(VFile *p_file, QWidget *p_parent = 0);
    virtual ~VEdit();
    virtual void beginEdit();
    virtual void endEdit();
    // Save buffer content to VFile.
    virtual void saveFile();
    virtual void setModified(bool p_modified);
    bool isModified() const;
    virtual void reloadFile();
    virtual void scrollToLine(int p_lineNumber);
    // User requests to insert an image.
    virtual void insertImage();
    bool findTextHelper(const QString &p_text, uint p_options,
                        bool p_forward, bool &p_wrapped);
    bool peekText(const QString &p_text, uint p_options);
    bool findText(const QString &p_text, uint p_options, bool p_forward);
    void replaceText(const QString &p_text, uint p_options,
                     const QString &p_replaceText, bool p_findNext);
    void replaceTextAll(const QString &p_text, uint p_options,
                        const QString &p_replaceText);
    void setReadOnly(bool p_ro);
    void clearSearchedWordHighlight();

private slots:
    void labelTimerTimeout();
    void triggerHighlightSelectedWord();
    void highlightSelectedWord();

protected slots:
    virtual void highlightCurrentLine();

protected:
    QPointer<VFile> m_file;
    VEditOperations *m_editOps;
    QColor m_cursorLineColor;

    virtual void updateFontAndPalette();

private:
    QLabel *m_wrapLabel;
    QTimer *m_labelTimer;
    // highlightExtraSelections() will highlight these selections.
    // Selections are indexed by SelectionId.
    QVector<QList<QTextEdit::ExtraSelection> > m_extraSelections;
    QTimer *m_selectedWordTimer;
    QColor m_selectedWordColor;
    QColor m_searchedWordColor;

    void showWrapLabel();
    void highlightExtraSelections();
    // Find all the occurences of @p_text.
    QList<QTextCursor> findTextAll(const QString &p_text, uint p_options);
    void highlightTextAll(const QString &p_text, uint p_options,
                          SelectionId p_id, QTextCharFormat p_format);
    void highlightSearchedWord(const QString &p_text, uint p_options);
    bool wordInSearchedSelection(const QString &p_text);
};



#endif // VEDIT_H