// Scintilla source code edit control
/** @file ContractionState.h
 ** Manages visibility of lines for folding.
 **/
// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.

#ifndef CONTRACTIONSTATE_H
#define CONTRACTIONSTATE_H

/**
 */
class OneLine {
public:
    int displayLine;    ///< Position within set of visible lines
    //int docLine;      ///< Inverse of @a displayLine
    int height; ///< Number of display lines needed to show all of the line
    bool visible;
    bool expanded;

    OneLine();
    virtual ~OneLine() {}
};

/**
 */
class ContractionState {
    void Grow(int sizeNew);
    enum { growSize = 4000 };
    int linesInDoc;
    mutable int linesInDisplay;
    mutable OneLine *lines;
    int size;
    mutable int *docLines;
    mutable int sizeDocLines;
    mutable bool valid;
    void MakeValid() const;

public:
    ContractionState();
    virtual ~ContractionState();

    void Clear();

    int LinesInDoc() const;
    int LinesDisplayed() const;
    int DisplayFromDoc(int lineDoc) const;
    int DocFromDisplay(int lineDisplay) const;

    void InsertLines(int lineDoc, int lineCount);
    void DeleteLines(int lineDoc, int lineCount);

    bool GetVisible(int lineDoc) const;
    bool SetVisible(int lineDocStart, int lineDocEnd, bool visible);

    bool GetExpanded(int lineDoc) const;
    bool SetExpanded(int lineDoc, bool expanded);

    int GetHeight(int lineDoc) const;
    bool SetHeight(int lineDoc, int height);

    void ShowAll();
};

#endif
