KernelLand/Kernel/drv/vterm_vt100.c

   1 /*
   2  * Acess2 Kernel
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * drv/vterm_vt100.c
   6  * - Virtual Terminal - VT100 (Kinda) Emulation
   7  */
   8 #define DEBUG   0
   9 #include "vterm.h"
  10
  11 #define sTerminal       sVTerm
  12 #include "../../../Usermode/Applications/gui_terminal_src/vt100.c"
  13
  14 void *Display_GetTermState(tTerminal *Term) {
  15         return Term->VT100Info;;
  16 }
  17 void Display_SetTermState(tTerminal *Term, void *State) {
  18         Term->VT100Info = State;
  19 }
  20
  21 void Display_AddText(tTerminal *Term, size_t Length, const char *UTF8Text)
  22 {
  23         LOG("'%*C'", Length, UTF8Text);
  24         VT_int_PutRawString(Term, (const void*)UTF8Text, Length);
  25 }
  26 void Display_Newline(tTerminal *Term, bool bCarriageReturn)
  27 {
  28         LOG("");
  29         VT_int_PutChar(Term, '\n');
  30 }
  31 void Display_SetScrollArea(tTerminal *Term, int Start, int Count)
  32 {
  33         LOG("(%i,+%i)", Start, Count);
  34         Term->ScrollTop = Start;
  35         Term->ScrollHeight = Count;
  36 }
  37 void Display_ScrollDown(tTerminal *Term, int CountDown)
  38 {
  39         LOG("(%i)", CountDown);
  40         VT_int_UpdateScreen(Term, 0);
  41         if( Term->Flags & VT_FLAG_ALTBUF )
  42                 VT_int_ScrollText(Term, CountDown);
  43         else
  44         {
  45                 if(Term->ViewPos/Term->TextWidth + CountDown < 0)
  46                         return ;
  47                 if(Term->ViewPos/Term->TextWidth + CountDown  > Term->TextHeight * (giVT_Scrollback + 1))
  48                         return ;
  49
  50                 Term->ViewPos += Term->TextWidth * CountDown;
  51         }
  52 }
  53 void Display_SetCursor(tTerminal *Term, int Row, int Col)
  54 {
  55         LOG("(R%i,C%i)", Row, Col);
  56         VT_int_UpdateScreen(Term, 0);
  57          int    maxrows = ((Term->Flags & VT_FLAG_ALTBUF) ? 1 : (giVT_Scrollback+1))*Term->TextHeight;
  58         ASSERTCR( Row, >=, 0, );
  59         ASSERTCR( Row, <, maxrows, );
  60         ASSERTCR( Col, >=, 0, );
  61         ASSERTCR( Col, <, Term->TextWidth, );
  62         *(Term->Flags & VT_FLAG_ALTBUF ? &Term->AltWritePos : &Term->WritePos) = Row*Term->TextWidth + Col;
  63 }
  64 void Display_MoveCursor(tTerminal *Term, int RelRow, int RelCol)
  65 {
  66         LOG("(R+%i,C+%i)", RelRow, RelCol);
  67         int     *wrpos = (Term->Flags & VT_FLAG_ALTBUF ? &Term->AltWritePos : &Term->WritePos);
  68
  69         if( RelCol != 0 )
  70         {
  71                 //
  72                 if( RelCol < 0 )
  73                 {
  74                          int    avail = *wrpos % Term->TextWidth;
  75                         if( RelCol < -avail )
  76                                 RelCol = -avail;
  77                 }
  78                 else
  79                 {
  80                         size_t  avail = Term->TextWidth - (*wrpos % Term->TextWidth);
  81                         if(RelCol > avail)
  82                                 RelCol = avail;
  83                 }
  84                 *wrpos += RelCol;
  85         }
  86         if( RelRow != 0 )
  87         {
  88                  int    currow = *wrpos / Term->TextWidth;
  89                  int    maxrows = ((Term->Flags & VT_FLAG_ALTBUF) ? 1 : (giVT_Scrollback+1))*Term->TextHeight;
  90                 if( RelRow < 0 )
  91                 {
  92                         if( RelRow < -currow )
  93                                 RelRow = -currow;
  94                 }
  95                 else
  96                 {
  97                         if( currow + RelRow > maxrows-1 )
  98                                 RelRow = maxrows-1 - currow;
  99                 }
 100                 *wrpos += RelRow*Term->TextWidth;
 101         }
 102         LOG("=(R%i,C%i)", *wrpos / Term->TextWidth, *wrpos % Term->TextWidth);
 103 }
 104 void Display_SaveCursor(tTerminal *Term)
 105 {
 106         Term->SavedWritePos = (Term->Flags & VT_FLAG_ALTBUF) ? Term->AltWritePos : Term->WritePos;
 107         LOG("Saved = %i", Term->SavedWritePos);
 108 }
 109 void Display_RestoreCursor(tTerminal *Term)
 110 {
 111          int    max = ((Term->Flags & VT_FLAG_ALTBUF) ? 1 : (giVT_Scrollback+1))*Term->TextHeight * Term->TextWidth;
 112          int    *wrpos = ((Term->Flags & VT_FLAG_ALTBUF) ? &Term->AltWritePos : &Term->WritePos);
 113         if( Term->SavedWritePos >= max )
 114                 *wrpos = max-1;
 115         else
 116                 *wrpos = Term->SavedWritePos;
 117         LOG("Restored %i", *wrpos);
 118 }
 119 // 0: All, 1: Forward, -1: Reverse
 120 void Display_ClearLine(tTerminal *Term, int Dir)
 121 {
 122         const int       wrpos = (Term->Flags & VT_FLAG_ALTBUF ? Term->AltWritePos : Term->WritePos);
 123         const int       row = wrpos / Term->TextWidth;
 124         const int       col = wrpos % Term->TextWidth;
 125
 126         LOG("(Dir=%i)", Dir);
 127
 128         // Erase all
 129         if( Dir == 0 ) {
 130                 VT_int_ClearLine(Term, row);
 131                 VT_int_UpdateScreen(Term, 0);
 132         }
 133         // Erase to right
 134         else if( Dir == 1 ) {
 135                 VT_int_ClearInLine(Term, row, col, Term->TextWidth);
 136                 VT_int_UpdateScreen(Term, 0);
 137         }
 138         // Erase to left
 139         else if( Dir == -1 ) {
 140                 VT_int_ClearInLine(Term, row, 0, col);
 141                 VT_int_UpdateScreen(Term, 0);
 142         }
 143         else {
 144                 // ERROR!
 145                 ASSERTC(Dir, >=, -1);
 146                 ASSERTC(Dir, <=, 1);
 147         }
 148 }
 149 void Display_ClearLines(tTerminal *Term, int Dir)
 150 {
 151         LOG("(Dir=%i)", Dir);
 152          int    *wrpos = (Term->Flags & VT_FLAG_ALTBUF ? &Term->AltWritePos : &Term->WritePos);
 153
 154         // All
 155         if( Dir == 0 ) {
 156                 int count;
 157
 158                 if( Term->Flags & VT_FLAG_ALTBUF ) {
 159                         count = Term->TextHeight;
 160                 }
 161                 else {
 162                         count = Term->TextHeight * (giVT_Scrollback + 1);
 163                         Term->ViewPos = 0;
 164                 }
 165                 while( count -- )
 166                         VT_int_ClearLine(Term, count);
 167                 *wrpos = 0;
 168                 VT_int_UpdateScreen(Term, 1);
 169         }
 170         // Downwards
 171         else if( Dir == 1 ) {
 172                 Log_Warning("VTerm", "TODO: ClearLines Down");
 173         }
 174         // Upwards
 175         else if( Dir == -1 ) {
 176                 Log_Warning("VTerm", "TODO: ClearLines Up");
 177         }
 178         else {
 179                 // ERROR!
 180                 ASSERTC(Dir, >=, -1);
 181                 ASSERTC(Dir, <=, 1);
 182         }
 183 }
 184 void Display_ResetAttributes(tTerminal *Term)
 185 {
 186         LOG("");
 187         Term->CurColour = DEFAULT_COLOUR;
 188 }
 189 void Display_SetForeground(tTerminal *Term, uint32_t RGB)
 190 {
 191         LOG("(%06x)", RGB);
 192         Term->CurColour &= 0x8000FFFF;
 193         Term->CurColour |= (Uint32)VT_Colour24to12(RGB) << 16;
 194
 195 }
 196 void Display_SetBackground(tTerminal *Term, uint32_t RGB)
 197 {
 198         LOG("(%06x)", RGB);
 199         Term->CurColour &= 0xFFFF8000;
 200         Term->CurColour |= (Uint32)VT_Colour24to12(RGB) <<  0;
 201 }
 202 void Display_Flush(tTerminal *Term)
 203 {
 204         LOG("");
 205         VT_int_UpdateScreen(Term, 0);
 206 }
 207 void Display_ShowAltBuffer(tTerminal *Term, bool AltBufEnabled)
 208 {
 209         LOG("(%B)", AltBufEnabled);
 210         VT_int_ToggleAltBuffer(Term, AltBufEnabled);
 211 }
 212 void Display_SetTitle(tTerminal *Term, const char *Title)
 213 {
 214         // ignore
 215 }
 216