C++ (Cpp) ClearLineBuffer Examples

Example #1

File: text.c Project: GYGit/reactos

NTSTATUS
TEXTMODE_BUFFER_Initialize(OUT PCONSOLE_SCREEN_BUFFER* Buffer,
                           IN PCONSOLE Console,
                           IN HANDLE ProcessHandle,
                           IN PTEXTMODE_BUFFER_INFO TextModeInfo)
{
    NTSTATUS Status = STATUS_SUCCESS;
    PTEXTMODE_SCREEN_BUFFER NewBuffer = NULL;

    UNREFERENCED_PARAMETER(ProcessHandle);

    if (Console == NULL || Buffer == NULL || TextModeInfo == NULL)
        return STATUS_INVALID_PARAMETER;

    *Buffer = NULL;

    Status = CONSOLE_SCREEN_BUFFER_Initialize((PCONSOLE_SCREEN_BUFFER*)&NewBuffer,
                                              Console,
                                              &TextVtbl,
                                              sizeof(TEXTMODE_SCREEN_BUFFER));
    if (!NT_SUCCESS(Status)) return Status;
    NewBuffer->Header.Type = TEXTMODE_BUFFER;

    NewBuffer->Buffer = ConsoleAllocHeap(HEAP_ZERO_MEMORY,
                                         TextModeInfo->ScreenBufferSize.X *
                                         TextModeInfo->ScreenBufferSize.Y *
                                            sizeof(CHAR_INFO));
    if (NewBuffer->Buffer == NULL)
    {
        CONSOLE_SCREEN_BUFFER_Destroy((PCONSOLE_SCREEN_BUFFER)NewBuffer);
        return STATUS_INSUFFICIENT_RESOURCES;
    }

    NewBuffer->ScreenBufferSize = NewBuffer->OldScreenBufferSize
                                = TextModeInfo->ScreenBufferSize;
    NewBuffer->ViewSize = NewBuffer->OldViewSize
                        = Console->ConsoleSize;

    NewBuffer->ViewOrigin.X = NewBuffer->ViewOrigin.Y = 0;
    NewBuffer->VirtualY = 0;

    NewBuffer->CursorBlinkOn = NewBuffer->ForceCursorOff = FALSE;
    NewBuffer->CursorInfo.bVisible = (TextModeInfo->IsCursorVisible && (TextModeInfo->CursorSize != 0));
    NewBuffer->CursorInfo.dwSize   = min(max(TextModeInfo->CursorSize, 0), 100);

    NewBuffer->ScreenDefaultAttrib = TextModeInfo->ScreenAttrib;
    NewBuffer->PopupDefaultAttrib  = TextModeInfo->PopupAttrib;

    /* Initialize buffer to be empty with default attributes */
    for (NewBuffer->CursorPosition.Y = 0 ; NewBuffer->CursorPosition.Y < NewBuffer->ScreenBufferSize.Y; NewBuffer->CursorPosition.Y++)
    {
        ClearLineBuffer(NewBuffer);
    }
    NewBuffer->CursorPosition.X = NewBuffer->CursorPosition.Y = 0;

    NewBuffer->Mode = ENABLE_PROCESSED_OUTPUT | ENABLE_WRAP_AT_EOL_OUTPUT;

    *Buffer = (PCONSOLE_SCREEN_BUFFER)NewBuffer;
    return STATUS_SUCCESS;
}

Example #2

File: terminal.c Project: CSRedRat/reactos-playground

static VOID
ConioNextLine(PTEXTMODE_SCREEN_BUFFER Buff, PSMALL_RECT UpdateRect, PUINT ScrolledLines)
{
    /* If we hit bottom, slide the viewable screen */
    if (++Buff->CursorPosition.Y == Buff->ScreenBufferSize.Y)
    {
        Buff->CursorPosition.Y--;
        if (++Buff->VirtualY == Buff->ScreenBufferSize.Y)
        {
            Buff->VirtualY = 0;
        }
        (*ScrolledLines)++;
        ClearLineBuffer(Buff);
        if (UpdateRect->Top != 0)
        {
            UpdateRect->Top--;
        }
    }
    UpdateRect->Left = 0;
    UpdateRect->Right = Buff->ScreenBufferSize.X - 1;
    UpdateRect->Bottom = Buff->CursorPosition.Y;
}