sgrHandler function

void sgrHandler(CSI csi, Terminal terminal)

SGR selects one or more character attributes at the same time. Multiple params (up to 32) are applied from in order from left to right. The changed attributes are applied to all new characters received. If you move characters in the viewport by scrolling or any other means, then the attributes move with the characters.

Implementation

void sgrHandler(CSI csi, Terminal terminal) {
  final params = csi.params.toList();

  if (params.isEmpty) {
    params.add(0);
  }

  for (var i = 0; i < params.length; i++) {
    final param = params[i];
    switch (param) {
      case 0:
        terminal.cursor.fg = terminal.theme.foreground;
        terminal.cursor.bg = TerminalColor.transparent;
        terminal.cursor.flags = 0x00;
        break;
      case 1:
        terminal.cursor.flags |= CellFlags.bold;
        break;
      case 2:
        terminal.cursor.flags |= CellFlags.faint;
        break;
      case 3:
        terminal.cursor.flags |= CellFlags.italic;
        break;
      case 4:
        terminal.cursor.flags |= CellFlags.underline;
        break;
      case 5:
        terminal.cursor.flags |= CellFlags.blink;
        break;
      case 7:
        terminal.cursor.flags |= CellFlags.inverse;
        break;
      case 8:
        terminal.cursor.flags |= CellFlags.invisible;
        break;
      case 21:
        terminal.cursor.flags &= ~CellFlags.bold;
        break;
      case 22:
        terminal.cursor.flags &= ~CellFlags.faint;
        break;
      case 23:
        terminal.cursor.flags &= ~CellFlags.italic;
        break;
      case 24:
        terminal.cursor.flags &= ~CellFlags.underline;
        break;
      case 25:
        terminal.cursor.flags &= ~CellFlags.blink;
        break;
      case 27:
        terminal.cursor.flags &= ~CellFlags.inverse;
        break;
      case 28:
        terminal.cursor.flags &= ~CellFlags.invisible;
        break;
      case 29:
        // not strikethrough
        break;
      case 39:
        terminal.cursor.fg = terminal.theme.foreground;
        break;
      case 30:
        terminal.cursor.fg = terminal.theme.black;
        break;
      case 31:
        terminal.cursor.fg = terminal.theme.red;
        break;
      case 32:
        terminal.cursor.fg = terminal.theme.green;
        break;
      case 33:
        terminal.cursor.fg = terminal.theme.yellow;
        break;
      case 34:
        terminal.cursor.fg = terminal.theme.blue;
        break;
      case 35:
        terminal.cursor.fg = terminal.theme.magenta;
        break;
      case 36:
        terminal.cursor.fg = terminal.theme.cyan;
        break;
      case 37:
        terminal.cursor.fg = terminal.theme.white;
        break;
      case 90:
        terminal.cursor.fg = terminal.theme.brightBlack;
        break;
      case 91:
        terminal.cursor.fg = terminal.theme.brightRed;
        break;
      case 92:
        terminal.cursor.fg = terminal.theme.brightGreen;
        break;
      case 93:
        terminal.cursor.fg = terminal.theme.brightYellow;
        break;
      case 94:
        terminal.cursor.fg = terminal.theme.brightBlue;
        break;
      case 95:
        terminal.cursor.fg = terminal.theme.brightMagenta;
        break;
      case 96:
        terminal.cursor.fg = terminal.theme.brightCyan;
        break;
      case 97:
        terminal.cursor.fg = terminal.theme.brightWhite;
        break;
      case 49:
        terminal.cursor.bg = terminal.theme.background;
        break;
      case 40:
        terminal.cursor.bg = terminal.theme.black;
        break;
      case 41:
        terminal.cursor.bg = terminal.theme.red;
        break;
      case 42:
        terminal.cursor.bg = terminal.theme.green;
        break;
      case 43:
        terminal.cursor.bg = terminal.theme.yellow;
        break;
      case 44:
        terminal.cursor.bg = terminal.theme.blue;
        break;
      case 45:
        terminal.cursor.bg = terminal.theme.magenta;
        break;
      case 46:
        terminal.cursor.bg = terminal.theme.cyan;
        break;
      case 47:
        terminal.cursor.bg = terminal.theme.white;
        break;
      case 100:
        terminal.cursor.bg = terminal.theme.brightBlack;
        break;
      case 101:
        terminal.cursor.bg = terminal.theme.brightRed;
        break;
      case 102:
        terminal.cursor.bg = terminal.theme.brightGreen;
        break;
      case 103:
        terminal.cursor.bg = terminal.theme.brightYellow;
        break;
      case 104:
        terminal.cursor.bg = terminal.theme.brightBlue;
        break;
      case 105:
        terminal.cursor.bg = terminal.theme.brightMagenta;
        break;
      case 106:
        terminal.cursor.bg = terminal.theme.brightCyan;
        break;
      case 107:
        terminal.cursor.bg = terminal.theme.brightWhite;
        break;
      case 38: // set foreground
        final colorResult = parseAnsiColour(params, i, terminal);
        terminal.cursor.fg = colorResult[0];
        i += colorResult[1];
        break;
      case 48: // set background
        final colorResult = parseAnsiColour(params, i, terminal);
        terminal.cursor.bg = colorResult[0];
        i += colorResult[1];
        break;
      default:
        terminal.debug.onError('unknown SGR: $param');
    }
  }
}