/************************************************************************
* ftextview.h - Widget FTextView (a multiline text viewer)              *
*                                                                       *
* This file is part of the Final Cut widget toolkit                     *
*                                                                       *
* Copyright 2014-2017 Markus Gans                                       *
*                                                                       *
* The Final Cut 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 3 of the License, or     *
* (at your option) any later version.                                   *
*                                                                       *
* The Final Cut 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/>. *
************************************************************************/

/*  Inheritance diagram
 *  ═══════════════════
 *
 * ▕▔▔▔▔▔▔▔▔▔▏
 * ▕  FTerm  ▏
 * ▕▁▁▁▁▁▁▁▁▁▏
 *      ▲
 *      │
 * ▕▔▔▔▔▔▔▔▔▔▏ ▕▔▔▔▔▔▔▔▔▔▏
 * ▕ FVTerm  ▏ ▕ FObject ▏
 * ▕▁▁▁▁▁▁▁▁▁▏ ▕▁▁▁▁▁▁▁▁▁▏
 *      ▲           ▲
 *      │           │
 *      └─────┬─────┘
 *            │
 *       ▕▔▔▔▔▔▔▔▔▔▏
 *       ▕ FWidget ▏
 *       ▕▁▁▁▁▁▁▁▁▁▏
 *            ▲
 *            │
 *      ▕▔▔▔▔▔▔▔▔▔▔▔▏
 *      ▕ FTextView ▏
 *      ▕▁▁▁▁▁▁▁▁▁▁▁▏
 */

#ifndef FTEXTVIEW_H
#define FTEXTVIEW_H

#if !defined (USE_FINAL_H) && !defined (COMPILE_FINAL_CUT)
  #error "Only <final/final.h> can be included directly."
#endif

#include <vector>

#include "final/fapplication.h"
#include "final/fscrollbar.h"
#include "final/fstatusbar.h"
#include "final/fstring.h"
#include "final/fwidget.h"


//----------------------------------------------------------------------
// class FTextView
//----------------------------------------------------------------------

#pragma pack(push)
#pragma pack(1)

class FTextView : public FWidget
{
  public:
    // Using-declarations
    using FWidget::setGeometry;

    // Constructor
    explicit FTextView (FWidget* = 0);

    // Destructor
    ~FTextView();

    // Accessors
    const char*        getClassName() const;
    uInt               getColumns() const;
    uInt               getRows() const;
    const FString      getText() const;
    const FStringList& getLines() const;

    // Mutators
    void               setGeometry (int, int, int, int, bool = true);
    void               setPosition (int);
    void               setText (const FString&);

    // Methods
    void               hide();
    void               append (const FString&);
    void               insert (const FString&, int);
    void               replaceRange (const FString&, int, int);
    void               deleteRange (int, int);
    void               deleteLine (int);
    void               clear();

    // Event handlers
    void               onKeyPress (FKeyEvent*);
    void               onMouseDown (FMouseEvent*);
    void               onMouseUp (FMouseEvent*);
    void               onMouseMove (FMouseEvent*);
    void               onWheel (FWheelEvent*);
    void               onFocusIn (FFocusEvent*);
    void               onFocusOut (FFocusEvent*);

  protected:
    // Method
    void               adjustSize();

  private:
    // Disable copy constructor
    FTextView (const FTextView&);

    // Disable assignment operator (=)
    FTextView& operator = (const FTextView&);

    // Methods
    void               init();
    void               draw();
    void               drawText();
    void               processChanged();

    // Callback methods
    void               cb_VBarChange (FWidget*, data_ptr);
    void               cb_HBarChange (FWidget*, data_ptr);

    // Data Members
    FStringList        data;
    FScrollbar*        vbar;
    FScrollbar*        hbar;
    int                xoffset;
    int                yoffset;
    int                nf_offset;
    uInt               maxLineWidth;
};
#pragma pack(pop)


// FListBox inline functions
//----------------------------------------------------------------------
inline const char* FTextView::getClassName() const
{ return "FTextView"; }

//----------------------------------------------------------------------
inline uInt FTextView::getColumns() const
{ return maxLineWidth; }

//----------------------------------------------------------------------
inline uInt FTextView::getRows() const
{ return uInt(data.size()); }

//----------------------------------------------------------------------
inline const FStringList& FTextView::getLines() const
{ return data; }

//----------------------------------------------------------------------
inline void FTextView::deleteRange (int from, int to)
{ replaceRange (FString(), from, to); }

//----------------------------------------------------------------------
inline void FTextView::deleteLine (int pos)
{ deleteRange (pos, pos); }

#endif  // FTEXTVIEW_H