tui.c

ReactOS是一些高手根据Windows XP的内核编写出的类XP。内核实现机理和API函数调用几乎相同。甚至可以兼容XP的程序。喜欢研究系统内核的人可以看一看。

	}
	if (Hour == 0)
	{
		Hour = 12;
	}
	_itoa(Hour, TempString, 10);
	strcpy(TimeString, "    ");
	strcat(TimeString, TempString);
	strcat(TimeString, ":");
	_itoa(Minute, TempString, 10);
	if (Minute < 10)
	{
		strcat(TimeString, "0");
	}
	strcat(TimeString, TempString);
	strcat(TimeString, ":");
	_itoa(Second, TempString, 10);
	if (Second < 10)
	{
		strcat(TimeString, "0");
	}
	strcat(TimeString, TempString);
	if (PMHour)
	{
		strcat(TimeString, " PM");
	}
	else
	{
		strcat(TimeString, " AM");
	}

	// Draw the time
	TuiDrawText(UiScreenWidth-strlen(TimeString)-2, 2, TimeString, ATTR(UiTitleBoxFgColor, UiTitleBoxBgColor));
}

VOID TuiSaveScreen(PUCHAR Buffer)
{
	PUCHAR	ScreenMemory = (PUCHAR)TextVideoBuffer;
	ULONG		i;

	for (i=0; i < (UiScreenWidth * UiScreenHeight * 2); i++)
	{
		Buffer[i] = ScreenMemory[i];
	}
}

VOID TuiRestoreScreen(PUCHAR Buffer)
{
	PUCHAR	ScreenMemory = (PUCHAR)TextVideoBuffer;
	ULONG		i;

	for (i=0; i < (UiScreenWidth * UiScreenHeight * 2); i++)
	{
		ScreenMemory[i] = Buffer[i];
	}
}

VOID TuiMessageBox(PCSTR MessageText)
{
	PVOID	ScreenBuffer;

	// Save the screen contents
	ScreenBuffer = MmAllocateMemory(UiScreenWidth * UiScreenHeight * 2);
	TuiSaveScreen(ScreenBuffer);

	// Display the message box
	TuiMessageBoxCritical(MessageText);

	// Restore the screen contents
	TuiRestoreScreen(ScreenBuffer);
	MmFreeMemory(ScreenBuffer);
}

VOID TuiMessageBoxCritical(PCSTR MessageText)
{
	int		width = 8;
	unsigned int	height = 1;
	int		curline = 0;
	int		k;
	size_t		i , j;
	int		x1, x2, y1, y2;
	char	temp[260];
	char	key;

	// Find the height
	for (i=0; i<strlen(MessageText); i++)
	{
		if (MessageText[i] == '\n')
			height++;
	}

	// Find the width
	for (i=0,j=0,k=0; i<height; i++)
	{
		while ((MessageText[j] != '\n') && (MessageText[j] != 0))
		{
			j++;
			k++;
		}

		if (k > width)
			width = k;

		k = 0;
		j++;
	}

	// Calculate box area
	x1 = (UiScreenWidth - (width+2))/2;
	x2 = x1 + width + 3;
	y1 = ((UiScreenHeight - height - 2)/2) + 1;
	y2 = y1 + height + 4;

	// Draw the box
	TuiDrawBox(x1, y1, x2, y2, D_VERT, D_HORZ, TRUE, TRUE, ATTR(UiMessageBoxFgColor, UiMessageBoxBgColor));

	// Draw the text
	for (i=0,j=0; i<strlen(MessageText)+1; i++)
	{
		if ((MessageText[i] == '\n') || (MessageText[i] == 0))
		{
			temp[j] = 0;
			j = 0;
			UiDrawText(x1+2, y1+1+curline, temp, ATTR(UiMessageBoxFgColor, UiMessageBoxBgColor));
			curline++;
		}
		else
			temp[j++] = MessageText[i];
	}

	// Draw OK button
	strcpy(temp, "   OK   ");
	UiDrawText(x1+((x2-x1)/2)-3, y2-2, temp, ATTR(COLOR_BLACK, COLOR_GRAY));

	// Draw status text
	UiDrawStatusText("Press ENTER to continue");

	VideoCopyOffScreenBufferToVRAM();

	for (;;)
	{
		if (MachConsKbHit())
		{
			key = MachConsGetCh();
			if(key == KEY_EXTENDED)
				key = MachConsGetCh();

			if(key == KEY_ENTER)
				break;
			else if(key == KEY_SPACE)
				break;
			else if(key == KEY_ESC)
				break;
		}

		TuiUpdateDateTime();

		VideoCopyOffScreenBufferToVRAM();
	}

}


VOID TuiDrawProgressBarCenter(ULONG Position, ULONG Range, PCHAR ProgressText)
{
	ULONG		Left, Top, Right, Bottom;
	ULONG		Width = 50; // Allow for 50 "bars"
	ULONG		Height = 2;

	//
	// Is this the minimal UI?
	//
	if (UiMinimal)
	{
		//
		// Use alternate settings
		//
		Width = 80;
		Left = 0;
		Right = Left + Width;
		Top = UiScreenHeight - Height - 4;
		Bottom = Top + Height + 1;
	}
	else
	{
		Left = (UiScreenWidth - Width - 4) / 2;
		Right = Left + Width + 3;
		Top = (UiScreenHeight - Height - 2) / 2;
		Top += 2;
	}

	Bottom = Top + Height + 1;

	TuiDrawProgressBar(Left, Top, Right, Bottom, Position, Range, ProgressText);
}

VOID TuiDrawProgressBar(ULONG Left, ULONG Top, ULONG Right, ULONG Bottom, ULONG Position, ULONG Range, PCHAR ProgressText)
{
	ULONG		i;
	ULONG		ProgressBarWidth = (Right - Left) - 3;

	// First make sure the progress bar text fits
	UiTruncateStringEllipsis(ProgressText, ProgressBarWidth - 4);

	if (Position > Range)
	{
		Position = Range;
	}

    //
    // Minimal UI has no box, and only generic loading text
    //
    if (!UiMinimal)
    {
	    // Draw the box
	    TuiDrawBox(Left, Top, Right, Bottom, VERT, HORZ, TRUE, TRUE, ATTR(UiMenuFgColor, UiMenuBgColor));

    	//
        //  Draw the "Loading..." text
        //
	    TuiDrawCenteredText(Left + 2, Top + 2, Right - 2, Top + 2, ProgressText, ATTR(UiTextColor, UiMenuBgColor));
    }
    else
    {
    	//
        //  Draw the "Loading..." text
        //
        TuiDrawCenteredText(Left + 2, Top + 1, Right - 2, Top + 1, "ReactOS is loading files...", ATTR(7, 0));
    }

	// Draw the percent complete
	for (i=0; i<(Position*ProgressBarWidth)/Range; i++)
	{
		TuiDrawText(Left+2+i, Top+2, "\xDB", ATTR(UiTextColor, UiMenuBgColor));
	}

	// Draw the shadow for non-minimal UI
    if (!UiMinimal)
    {
	    for (; i<ProgressBarWidth; i++)
	    {
		    TuiDrawText(Left+2+i, Top+2, "\xB2", ATTR(UiTextColor, UiMenuBgColor));
	    }
    }

	TuiUpdateDateTime();
	VideoCopyOffScreenBufferToVRAM();
}

UCHAR TuiTextToColor(PCSTR ColorText)
{
	if (_stricmp(ColorText, "Black") == 0)
		return COLOR_BLACK;
	else if (_stricmp(ColorText, "Blue") == 0)
		return COLOR_BLUE;
	else if (_stricmp(ColorText, "Green") == 0)
		return COLOR_GREEN;
	else if (_stricmp(ColorText, "Cyan") == 0)
		return COLOR_CYAN;
	else if (_stricmp(ColorText, "Red") == 0)
		return COLOR_RED;
	else if (_stricmp(ColorText, "Magenta") == 0)
		return COLOR_MAGENTA;
	else if (_stricmp(ColorText, "Brown") == 0)
		return COLOR_BROWN;
	else if (_stricmp(ColorText, "Gray") == 0)
		return COLOR_GRAY;
	else if (_stricmp(ColorText, "DarkGray") == 0)
		return COLOR_DARKGRAY;
	else if (_stricmp(ColorText, "LightBlue") == 0)
		return COLOR_LIGHTBLUE;
	else if (_stricmp(ColorText, "LightGreen") == 0)
		return COLOR_LIGHTGREEN;
	else if (_stricmp(ColorText, "LightCyan") == 0)
		return COLOR_LIGHTCYAN;
	else if (_stricmp(ColorText, "LightRed") == 0)
		return COLOR_LIGHTRED;
	else if (_stricmp(ColorText, "LightMagenta") == 0)
		return COLOR_LIGHTMAGENTA;
	else if (_stricmp(ColorText, "Yellow") == 0)
		return COLOR_YELLOW;
	else if (_stricmp(ColorText, "White") == 0)
		return COLOR_WHITE;

	return COLOR_BLACK;
}

UCHAR TuiTextToFillStyle(PCSTR FillStyleText)
{
	if (_stricmp(FillStyleText, "Light") == 0)
	{
		return LIGHT_FILL;
	}
	else if (_stricmp(FillStyleText, "Medium") == 0)
	{
		return MEDIUM_FILL;
	}
	else if (_stricmp(FillStyleText, "Dark") == 0)
	{
		return DARK_FILL;
	}

	return LIGHT_FILL;
}

VOID TuiFadeInBackdrop(VOID)
{
	PPALETTE_ENTRY TuiFadePalette = NULL;

	if (UiUseSpecialEffects && ! MachVideoIsPaletteFixed())
	{
		TuiFadePalette = (PPALETTE_ENTRY)MmAllocateMemory(sizeof(PALETTE_ENTRY) * 64);

		if (TuiFadePalette != NULL)
		{
			VideoSavePaletteState(TuiFadePalette, 64);
			VideoSetAllColorsToBlack(64);
		}
	}

	// Draw the backdrop and title box
	TuiDrawBackdrop();

	if (UiUseSpecialEffects && ! MachVideoIsPaletteFixed() && TuiFadePalette != NULL)
	{
		VideoFadeIn(TuiFadePalette, 64);
		MmFreeMemory(TuiFadePalette);
	}
}

VOID TuiFadeOut(VOID)
{
	PPALETTE_ENTRY TuiFadePalette = NULL;

	if (UiUseSpecialEffects && ! MachVideoIsPaletteFixed())
	{
		TuiFadePalette = (PPALETTE_ENTRY)MmAllocateMemory(sizeof(PALETTE_ENTRY) * 64);

		if (TuiFadePalette != NULL)
		{
			VideoSavePaletteState(TuiFadePalette, 64);
		}
	}

	if (UiUseSpecialEffects && ! MachVideoIsPaletteFixed() && TuiFadePalette != NULL)
	{
		VideoFadeOut(64);
	}

	MachVideoSetDisplayMode(NULL, FALSE);

	if (UiUseSpecialEffects && ! MachVideoIsPaletteFixed() && TuiFadePalette != NULL)
	{
		VideoRestorePaletteState(TuiFadePalette, 64);
		MmFreeMemory(TuiFadePalette);
	}

}

BOOLEAN TuiEditBox(PCSTR MessageText, PCHAR EditTextBuffer, ULONG Length)
{
	int		width = 8;
	unsigned int	height = 1;
	int		curline = 0;
	int		k;
	size_t		i , j;
	int		x1, x2, y1, y2;
	char	temp[260];
	char	key;
	int		EditBoxLine;
	ULONG		EditBoxStartX, EditBoxEndX;
	int		EditBoxCursorX;
	unsigned int	EditBoxTextCount;
	int		EditBoxTextDisplayIndex;
	BOOLEAN	ReturnCode;
	PVOID	ScreenBuffer;

	// Save the screen contents
	ScreenBuffer = MmAllocateMemory(UiScreenWidth * UiScreenHeight * 2);
	TuiSaveScreen(ScreenBuffer);

	// Find the height
	for (i=0; i<strlen(MessageText); i++)
	{
		if (MessageText[i] == '\n')
			height++;
	}

	// Find the width
	for (i=0,j=0,k=0; i<height; i++)
	{
		while ((MessageText[j] != '\n') && (MessageText[j] != 0))
		{
			j++;
			k++;
		}

		if (k > width)
			width = k;

		k = 0;
		j++;
	}

	// Calculate box area
	x1 = (UiScreenWidth - (width+2))/2;
	x2 = x1 + width + 3;
	y1 = ((UiScreenHeight - height - 2)/2) + 1;
	y2 = y1 + height + 4;

	// Draw the box
	TuiDrawBox(x1, y1, x2, y2, D_VERT, D_HORZ, TRUE, TRUE, ATTR(UiMessageBoxFgColor, UiMessageBoxBgColor));

	// Draw the text
	for (i=0,j=0; i<strlen(MessageText)+1; i++)
	{
		if ((MessageText[i] == '\n') || (MessageText[i] == 0))
		{
			temp[j] = 0;
			j = 0;
			UiDrawText(x1+2, y1+1+curline, temp, ATTR(UiMessageBoxFgColor, UiMessageBoxBgColor));
			curline++;
		}
		else
			temp[j++] = MessageText[i];
	}

	EditBoxTextCount = 0;
	EditBoxLine = y2 - 2;
	EditBoxStartX = x1 + 3;
	EditBoxEndX = x2 - 3;
	UiFillArea(EditBoxStartX, EditBoxLine, EditBoxEndX, EditBoxLine, ' ', ATTR(UiEditBoxTextColor, UiEditBoxBgColor));

	// Show the cursor
	EditBoxCursorX = EditBoxStartX;
	MachVideoSetTextCursorPosition(EditBoxCursorX, EditBoxLine);
	MachVideoHideShowTextCursor(TRUE);

	// Draw status text
	UiDrawStatusText("Press ENTER to continue, or ESC to cancel");

	VideoCopyOffScreenBufferToVRAM();

	for (;;)
	{
		if (MachConsKbHit())
		{
			key = MachConsGetCh();
			if(key == KEY_EXTENDED)
			{
				key = MachConsGetCh();
			}

			if(key == KEY_ENTER)
			{
				ReturnCode = TRUE;
				break;
			}
			else if(key == KEY_ESC)
			{
				ReturnCode = FALSE;
				break;
			}
			else if (key == KEY_BACKSPACE) // Remove a character
			{
				if (EditBoxTextCount)
				{
					EditBoxTextCount--;
					EditTextBuffer[EditBoxTextCount] = 0;
				}
				else
				{
					beep();
				}
			}
			else // Add this key to the buffer
			{
				if (EditBoxTextCount < Length - 1)
				{
					EditTextBuffer[EditBoxTextCount] = key;
					EditBoxTextCount++;
					EditTextBuffer[EditBoxTextCount] = 0;
				}
				else
				{
					beep();
				}
			}
		}

		// Draw the edit box background
		UiFillArea(EditBoxStartX, EditBoxLine, EditBoxEndX, EditBoxLine, ' ', ATTR(UiEditBoxTextColor, UiEditBoxBgColor));

		// Fill the text in
		if (EditBoxTextCount > (EditBoxEndX - EditBoxStartX))
		{
			EditBoxTextDisplayIndex = EditBoxTextCount - (EditBoxEndX - EditBoxStartX);
			EditBoxCursorX = EditBoxEndX;
		}
		else
		{
			EditBoxTextDisplayIndex = 0;
			EditBoxCursorX = EditBoxStartX + EditBoxTextCount;
		}
		UiDrawText(EditBoxStartX, EditBoxLine, &EditTextBuffer[EditBoxTextDisplayIndex], ATTR(UiEditBoxTextColor, UiEditBoxBgColor));

		// Move the cursor
		MachVideoSetTextCursorPosition(EditBoxCursorX, EditBoxLine);

		TuiUpdateDateTime();

		VideoCopyOffScreenBufferToVRAM();
	}

	// Hide the cursor again
	MachVideoHideShowTextCursor(FALSE);

	// Restore the screen contents
	TuiRestoreScreen(ScreenBuffer);
	MmFreeMemory(ScreenBuffer);

	return ReturnCode;
}