/*
 * Copyright 2012-2019, Adrien Destugues, pulkomandy@pulkomandy.tk
 * Distributed under the terms of the MIT licence.
 */


#include <String.h>
#include <View.h>

extern "C" {
        #include <vterm.h>
}


class TermView: public BView
{
        public:
                                                        TermView();
                                                        TermView(BRect bounds);
                                                        ~TermView();

                                void            AttachedToWindow();
                                void            Draw(BRect updateRect);
                                void            FrameResized(float width, float height);
                                void            GetPreferredSize(float* width, float* height);
                                void            KeyDown(const char* bytes, int32 numBytes);
                                void            MouseDown(BPoint where);
                                void            MessageReceived(BMessage* message);
                                void            SetLineTerminator(BString bytes);

                                void            PushBytes(const char* bytes, const size_t length);
                                void            Clear();
                                void            PasteFromClipboard();

        private:
                                void            _Init();

                                VTermRect       _PixelsToGlyphs(BRect pixels) const;
                                BRect           _GlyphsToPixels(const VTermRect& glyphs) const;
                                BRect           _GlyphsToPixels(const int width, const int height)
                                                                const;
                                void            _GetCell(VTermPos pos, VTermScreenCell& cell);

                                void            _Damage(VTermRect rect);
                                void            _MoveCursor(VTermPos pos, VTermPos oldPos,
                                                                int visible);
                                void            _PushLine(int cols, const VTermScreenCell* cells);
                                int                     _PopLine(int cols, VTermScreenCell* cells);
                                void            _UpdateScrollbar();

                static  int                     _Damage(VTermRect rect, void* user);
                static  int                     _MoveCursor(VTermPos pos, VTermPos oldPos,
                                                                int visible, void* user);
                static  int                     _PushLine(int cols, const VTermScreenCell* cells,
                                                                void* user);
                static  int                     _PopLine(int cols, VTermScreenCell* cells,
                                                                void* user);

        private:
                VTerm* fTerm;
                VTermScreen* fTermScreen;
                BList fScrollBuffer;
                int fFontWidth;
                int fFontHeight;

                BString fLineTerminator;

                static const VTermScreenCallbacks sScreenCallbacks;

                static const int kDefaultWidth = 80;
                static const int kDefaultHeight = 25;
                static const int kBorderSpacing = 3;
                static const int kScrollBackSize = 10000;
};