Function ExtScrollLine

src/ConEmuHk/ExtConsole.cpp:1621–1737

From the cursor position!

// From the cursor position!
BOOL ExtScrollLine(ExtScrollScreenParm* Info)
{
	ORIGINALCALLCOUNT_(ExtScrollLine,-1);

	int nDir = (int)Info->Dir;
	if (nDir == 0)
	{
		_ASSERTE(FALSE && "Nothing to do");
		return FALSE;
	}

	HANDLE h = Info->ConsoleOutput;
	BOOL lbTrueColor = ExtCheckBuffers(h);
	UNREFERENCED_PARAMETER(lbTrueColor);

	CONSOLE_SCREEN_BUFFER_INFO csbi = {};
	SMALL_RECT srWork = {};
	if (!ExtGetBufferInfo(h, csbi, srWork))
		return FALSE;


	SHORT nWindowWidth  = srWork.Right - srWork.Left + 1;
	SHORT nWindowHeight = srWork.Bottom - srWork.Top + 1;

	int nMaxCell = std::min(nWindowWidth * nWindowHeight, gpTrueColor->bufferSize);
	int nMaxRows = nMaxCell / nWindowWidth;
	int nY1 = (csbi.dwCursorPosition.Y - srWork.Top);

	AnnotationInfo* pTrueColorStart = (AnnotationInfo*)(gpTrueColor ? (((LPBYTE)gpTrueColor) + gpTrueColor->struct_size) : NULL); //-V104
	AnnotationInfo* pTrueColorEnd = pTrueColorStart ? (pTrueColorStart + gpTrueColor->bufferSize) : NULL; //-V104

	ORIGINAL_KRNL(ScrollConsoleScreenBufferW);

	if (Info->Flags & essf_Current)
	{
		ExtAttributesParm DefClr = {sizeof(DefClr), h};
		ExtGetAttributes(&DefClr);
		Info->FillAttr = DefClr.Attributes;
	}

	if (csbi.dwCursorPosition.X >= (csbi.dwSize.X-1))
	{
		_ASSERTE((csbi.dwCursorPosition.X >= (csbi.dwSize.X - 1)) && "Nothing to scroll?")
	}
	else if (_abs(nDir) >= (csbi.dwSize.X - csbi.dwCursorPosition.X))
	{
		COORD crf = csbi.dwCursorPosition;
		ExtFillOutputParm f0 = {sizeof(f0), efof_Attribute|efof_Character, h,
			Info->FillAttr, Info->FillChar, crf, (csbi.dwSize.X - csbi.dwCursorPosition.X)};
		ExtFillOutput(&f0);

	}
	else
	{
		INT_PTR ccCellsTotal = (csbi.dwSize.X - csbi.dwCursorPosition.X);
		INT_PTR ccCellsMove = ccCellsTotal - _abs(nDir);
		INT_PTR ccCellsClear = _abs(nDir);
		COORD crf = csbi.dwCursorPosition;