/** @file
Implementation for EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL protocol.
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.
Copyright (C) 2016 Silicon Graphics, Inc. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "Terminal.h"
//
// This list is used to define the valid extend chars.
// It also provides a mapping from Unicode to PCANSI or
// ASCII. The ASCII mapping we just made up.
//
//
UNICODE_TO_CHAR UnicodeToPcAnsiOrAscii[] = {
{ BOXDRAW_HORIZONTAL, 0xc4, L'-' },
{ BOXDRAW_VERTICAL, 0xb3, L'|' },
{ BOXDRAW_DOWN_RIGHT, 0xda, L'/' },
{ BOXDRAW_DOWN_LEFT, 0xbf, L'\\' },
{ BOXDRAW_UP_RIGHT, 0xc0, L'\\' },
{ BOXDRAW_UP_LEFT, 0xd9, L'/' },
{ BOXDRAW_VERTICAL_RIGHT, 0xc3, L'|' },
{ BOXDRAW_VERTICAL_LEFT, 0xb4, L'|' },
{ BOXDRAW_DOWN_HORIZONTAL, 0xc2, L'+' },
{ BOXDRAW_UP_HORIZONTAL, 0xc1, L'+' },
{ BOXDRAW_VERTICAL_HORIZONTAL, 0xc5, L'+' },
{ BOXDRAW_DOUBLE_HORIZONTAL, 0xcd, L'-' },
{ BOXDRAW_DOUBLE_VERTICAL, 0xba, L'|' },
{ BOXDRAW_DOWN_RIGHT_DOUBLE, 0xd5, L'/' },
{ BOXDRAW_DOWN_DOUBLE_RIGHT, 0xd6, L'/' },
{ BOXDRAW_DOUBLE_DOWN_RIGHT, 0xc9, L'/' },
{ BOXDRAW_DOWN_LEFT_DOUBLE, 0xb8, L'\\' },
{ BOXDRAW_DOWN_DOUBLE_LEFT, 0xb7, L'\\' },
{ BOXDRAW_DOUBLE_DOWN_LEFT, 0xbb, L'\\' },
{ BOXDRAW_UP_RIGHT_DOUBLE, 0xd4, L'\\' },
{ BOXDRAW_UP_DOUBLE_RIGHT, 0xd3, L'\\' },
{ BOXDRAW_DOUBLE_UP_RIGHT, 0xc8, L'\\' },
{ BOXDRAW_UP_LEFT_DOUBLE, 0xbe, L'/' },
{ BOXDRAW_UP_DOUBLE_LEFT, 0xbd, L'/' },
{ BOXDRAW_DOUBLE_UP_LEFT, 0xbc, L'/' },
{ BOXDRAW_VERTICAL_RIGHT_DOUBLE, 0xc6, L'|' },
{ BOXDRAW_VERTICAL_DOUBLE_RIGHT, 0xc7, L'|' },
{ BOXDRAW_DOUBLE_VERTICAL_RIGHT, 0xcc, L'|' },
{ BOXDRAW_VERTICAL_LEFT_DOUBLE, 0xb5, L'|' },
{ BOXDRAW_VERTICAL_DOUBLE_LEFT, 0xb6, L'|' },
{ BOXDRAW_DOUBLE_VERTICAL_LEFT, 0xb9, L'|' },
{ BOXDRAW_DOWN_HORIZONTAL_DOUBLE, 0xd1, L'+' },
{ BOXDRAW_DOWN_DOUBLE_HORIZONTAL, 0xd2, L'+' },
{ BOXDRAW_DOUBLE_DOWN_HORIZONTAL, 0xcb, L'+' },
{ BOXDRAW_UP_HORIZONTAL_DOUBLE, 0xcf, L'+' },
{ BOXDRAW_UP_DOUBLE_HORIZONTAL, 0xd0, L'+' },
{ BOXDRAW_DOUBLE_UP_HORIZONTAL, 0xca, L'+' },
{ BOXDRAW_VERTICAL_HORIZONTAL_DOUBLE, 0xd8, L'+' },
{ BOXDRAW_VERTICAL_DOUBLE_HORIZONTAL, 0xd7, L'+' },
{ BOXDRAW_DOUBLE_VERTICAL_HORIZONTAL, 0xce, L'+' },
{ BLOCKELEMENT_FULL_BLOCK, 0xdb, L'*' },
{ BLOCKELEMENT_LIGHT_SHADE, 0xb0, L'+' },
{ GEOMETRICSHAPE_UP_TRIANGLE, '^', L'^' },
{ GEOMETRICSHAPE_RIGHT_TRIANGLE, '>', L'>' },
{ GEOMETRICSHAPE_DOWN_TRIANGLE, 'v', L'v' },
{ GEOMETRICSHAPE_LEFT_TRIANGLE, '<', L'<' },
{ ARROW_LEFT, '<', L'<' },
{ ARROW_UP, '^', L'^' },
{ ARROW_RIGHT, '>', L'>' },
{ ARROW_DOWN, 'v', L'v' },
{ 0x0000, 0x00, L'\0' }
};
CHAR16 mSetModeString[] = { ESC, '[', '=', '3', 'h', 0 };
CHAR16 mSetAttributeString[] = { ESC, '[', '0', 'm', ESC, '[', '4', '0', 'm', ESC, '[', '4', '0', 'm', 0 };
CHAR16 mClearScreenString[] = { ESC, '[', '2', 'J', 0 };
CHAR16 mSetCursorPositionString[] = { ESC, '[', '0', '0', ';', '0', '0', 'H', 0 };
CHAR16 mCursorForwardString[] = { ESC, '[', '0', '0', 'C', 0 };
CHAR16 mCursorBackwardString[] = { ESC, '[', '0', '0', 'D', 0 };
//
// Body of the ConOut functions
//
/**
Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.Reset().
If ExtendeVerification is TRUE, then perform dependent serial device reset,
and set display mode to mode 0.
If ExtendedVerification is FALSE, only set display mode to mode 0.
@param This Indicates the calling context.
@param ExtendedVerification Indicates that the driver may perform a more
exhaustive verification operation of the device
during reset.
@retval EFI_SUCCESS The reset operation succeeds.
@retval EFI_DEVICE_ERROR The terminal is not functioning correctly or the serial port reset fails.
**/
EFI_STATUS
EFIAPI
TerminalConOutReset (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
IN BOOLEAN ExtendedVerification
)
{
EFI_STATUS Status;
TERMINAL_DEV *TerminalDevice;
TerminalDevice = TERMINAL_CON_OUT_DEV_FROM_THIS (This);
//
// Perform a more exhaustive reset by resetting the serial port.
//
if (ExtendedVerification) {
//
// Report progress code here
//
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_PROGRESS_CODE,
(EFI_PERIPHERAL_REMOTE_CONSOLE | EFI_P_PC_RESET),
TerminalDevice->DevicePath
);
Status = TerminalDevice->SerialIo->Reset (TerminalDevice->SerialIo);
if (EFI_ERROR (Status)) {
//
// Report error code here
//
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
(EFI_PERIPHERAL_REMOTE_CONSOLE | EFI_P_EC_CONTROLLER_ERROR),
TerminalDevice->DevicePath
);
return Status;
}
}
This->SetAttribute (This, EFI_TEXT_ATTR (This->Mode->Attribute & 0x0F, EFI_BLACK));
Status = This->SetMode (This, 0);
return Status;
}
/**
Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.OutputString().
The Unicode string will be converted to terminal expressible data stream
and send to terminal via serial port.
@param This Indicates the calling context.
@param WString The Null-terminated Unicode string to be displayed
on the terminal screen.
@retval EFI_SUCCESS The string is output successfully.
@retval EFI_DEVICE_ERROR The serial port fails to send the string out.
@retval EFI_WARN_UNKNOWN_GLYPH Indicates that some of the characters in the Unicode string could not
be rendered and are skipped.
@retval EFI_UNSUPPORTED If current display mode is out of range.
**/
EFI_STATUS
EFIAPI
TerminalConOutOutputString (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
IN CHAR16 *WString
)
{
TERMINAL_DEV *TerminalDevice;
EFI_SIMPLE_TEXT_OUTPUT_MODE *Mode;
UINTN MaxColumn;
UINTN MaxRow;
UINTN Length;
UTF8_CHAR Utf8Char;
CHAR8 GraphicChar;
CHAR8 AsciiChar;
EFI_STATUS Status;
UINT8 ValidBytes;
CHAR8 CrLfStr[2];
//
// flag used to indicate whether condition happens which will cause
// return EFI_WARN_UNKNOWN_GLYPH
//
BOOLEAN Warning;
ValidBytes = 0;
Warning = FALSE;
AsciiChar = 0;
//
// get Terminal device data structure pointer.
//
TerminalDevice = TERMINAL_CON_OUT_DEV_FROM_THIS (This);
//
// Get current display mode
//
Mode = This->Mode;
if (Mode->Mode >= Mode->MaxMode) {
return EFI_UNSUPPORTED;
}
This->QueryMode (
This,
Mode->Mode,
&MaxColumn,
&MaxRow
);
for (; *WString != CHAR_NULL; WString++) {
switch (TerminalDevice->TerminalType) {
case TerminalTypePcAnsi:
case TerminalTypeVt100:
case TerminalTypeVt100Plus:
case TerminalTypeTtyTerm:
case TerminalTypeLinux:
case TerminalTypeXtermR6:
case TerminalTypeVt400:
case TerminalTypeSCO:
if (!TerminalIsValidTextGraphics (*WString, &GraphicChar, &AsciiChar)) {
//
// If it's not a graphic character convert Unicode to ASCII.
//
GraphicChar = (CHAR8) *WString;
if (!(TerminalIsValidAscii (GraphicChar) || TerminalIsValidEfiCntlChar (GraphicChar))) {
//
// when this driver use the OutputString to output control string,
// TerminalDevice->OutputEscChar is set to let the Esc char
// to be output to the terminal emulation software.
//
if ((GraphicChar == 27) && TerminalDevice->OutputEscChar) {
GraphicChar = 27;
} else {
GraphicChar = '?';
Warning = TRUE;
}
}
AsciiChar = GraphicChar;
}
if (TerminalDevice->TerminalType != TerminalTypePcAnsi) {
GraphicChar = AsciiChar;
}
Length = 1;
Status = TerminalDevice->SerialIo->Write (
TerminalDevice->SerialIo,
&Length,
&GraphicChar
);
if (EFI_ERROR (Status)) {
goto OutputError;
}
break;
case TerminalTypeVtUtf8:
UnicodeToUtf8 (*WString, &Utf8Char, &ValidBytes);
Length = ValidBytes;
Status = TerminalDevice->SerialIo->Write (
TerminalDevice->SerialIo,
&Length,
(UINT8 *) &Utf8Char
);
if (EFI_ERROR (Status)) {
goto OutputError;
}
break;
}
//
// Update cursor position.
//
switch (*WString) {
case CHAR_BACKSPACE:
if (Mode->CursorColumn > 0) {
Mode->CursorColumn--;
}
break;
case CHAR_LINEFEED:
if (Mode->CursorRow < (INT32) (MaxRow - 1)) {
Mode->CursorRow++;
}
break;
case CHAR_CARRIAGE_RETURN:
Mode->CursorColumn = 0;
break;
default:
if (Mode->CursorColumn < (INT32) (MaxColumn - 1)) {
Mode->CursorColumn++;
} else {
Mode->CursorColumn = 0;
if (Mode->CursorRow < (INT32) (MaxRow - 1)) {
Mode->CursorRow++;
}
if (TerminalDevice->TerminalType == TerminalTypeTtyTerm &&
!TerminalDevice->OutputEscChar) {
//
// We've written the last character on the line. The
// terminal doesn't actually wrap its cursor until we print
// the next character, but the driver thinks it has wrapped
// already. Print CR LF to synchronize the terminal with
// the driver, but only if we're not in the middle of
// printing an escape sequence.
//
CrLfStr[0] = '\r';
CrLfStr[1] = '\n';
Length = sizeof(CrLfStr);
Status = TerminalDevice->SerialIo->Write (
TerminalDevice->SerialIo,
&Length,
CrLfStr
);
if (EFI_ERROR (Status)) {
goto OutputError;
}
}
}
break;
};
}
if (Warning) {
return EFI_WARN_UNKNOWN_GLYPH;
}
return EFI_SUCCESS;
OutputError:
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_ERROR_CODE | EFI_ERROR_MINOR,
(EFI_PERIPHERAL_REMOTE_CONSOLE | EFI_P_EC_OUTPUT_ERROR),
TerminalDevice->DevicePath
);
return EFI_DEVICE_ERROR;
}
/**
Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.TestString().
If one of the characters in the *Wstring is
neither valid Unicode drawing characters,
not ASCII code, then this function will return
EFI_UNSUPPORTED.
@param This Indicates the calling context.
@param WString The Null-terminated Unicode string to be tested.
@retval EFI_SUCCESS The terminal is capable of rendering the output string.
@retval EFI_UNSUPPORTED Some of the characters in the Unicode string cannot be rendered.
**/
EFI_STATUS
EFIAPI
TerminalConOutTestString (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
IN CHAR16 *WString
)
{
TERMINAL_DEV *TerminalDevice;
EFI_STATUS Status;
//
// get Terminal device data structure pointer.
//
TerminalDevice = TERMINAL_CON_OUT_DEV_FROM_THIS (This);
switch (TerminalDevice->TerminalType) {
case TerminalTypePcAnsi:
case TerminalTypeVt100:
case TerminalTypeVt100Plus:
case TerminalTypeTtyTerm:
Status = AnsiTestString (TerminalDevice, WString);
break;
case TerminalTypeVtUtf8:
Status = VTUTF8TestString (TerminalDevice, WString);
break;
default:
Status = EFI_UNSUPPORTED;
break;
}
return Status;
}
/**
Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.QueryMode().
It returns information for an available text mode
that the terminal supports.
@param This Indicates the calling context.
@param ModeNumber The mode number to return information on.
@param Columns The returned columns of the requested mode.
@param Rows The returned rows of the requested mode.
@retval EFI_SUCCESS The requested mode information is returned.
@retval EFI_UNSUPPORTED The mode number is not valid.
**/
EFI_STATUS
EFIAPI
TerminalConOutQueryMode (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
IN UINTN ModeNumber,
OUT UINTN *Columns,
OUT UINTN *Rows
)
{
TERMINAL_DEV *TerminalDevice;
if (ModeNumber >= (UINTN) This->Mode->MaxMode) {
return EFI_UNSUPPORTED;
}
//
// Get Terminal device data structure pointer.
//
TerminalDevice = TERMINAL_CON_OUT_DEV_FROM_THIS (This);
*Columns = TerminalDevice->TerminalConsoleModeData[ModeNumber].Columns;
*Rows = TerminalDevice->TerminalConsoleModeData[ModeNumber].Rows;
return EFI_SUCCESS;
}
/**
Implements EFI_SIMPLE_TEXT_OUT.SetMode().
Set the terminal to a specified display mode.
In this driver, we only support mode 0.
@param This Indicates the calling context.
@param ModeNumber The text mode to set.
@retval EFI_SUCCESS The requested text mode is set.
@retval EFI_DEVICE_ERROR The requested text mode cannot be set
because of serial device error.
@retval EFI_UNSUPPORTED The text mode number is not valid.
**/
EFI_STATUS
EFIAPI
TerminalConOutSetMode (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
IN UINTN ModeNumber
)
{
EFI_STATUS Status;
TERMINAL_DEV *TerminalDevice;
//
// get Terminal device data structure pointer.
//
TerminalDevice = TERMINAL_CON_OUT_DEV_FROM_THIS (This);
if (ModeNumber >= (UINTN) This->Mode->MaxMode) {
return EFI_UNSUPPORTED;
}
//
// Set the current mode
//
This->Mode->Mode = (INT32) ModeNumber;
This->ClearScreen (This);
TerminalDevice->OutputEscChar = TRUE;
Status = This->OutputString (This, mSetModeString);
TerminalDevice->OutputEscChar = FALSE;
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
This->Mode->Mode = (INT32) ModeNumber;
Status = This->ClearScreen (This);
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
return EFI_SUCCESS;
}
/**
Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.SetAttribute().
@param This Indicates the calling context.
@param Attribute The attribute to set. Only bit0..6 are valid, all other bits
are undefined and must be zero.
@retval EFI_SUCCESS The requested attribute is set.
@retval EFI_DEVICE_ERROR The requested attribute cannot be set due to serial port error.
@retval EFI_UNSUPPORTED The attribute requested is not defined by EFI spec.
**/
EFI_STATUS
EFIAPI
TerminalConOutSetAttribute (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
IN UINTN Attribute
)
{
UINT8 ForegroundControl;
UINT8 BackgroundControl;
UINT8 BrightControl;
INT32 SavedColumn;
INT32 SavedRow;
EFI_STATUS Status;
TERMINAL_DEV *TerminalDevice;
SavedColumn = 0;
SavedRow = 0;
//
// get Terminal device data structure pointer.
//
TerminalDevice = TERMINAL_CON_OUT_DEV_FROM_THIS (This);
//
// only the bit0..6 of the Attribute is valid
//
if ((Attribute | 0x7f) != 0x7f) {
return EFI_UNSUPPORTED;
}
//
// Skip outputting the command string for the same attribute
// It improves the terminal performance significantly
//
if (This->Mode->Attribute == (INT32) Attribute) {
return EFI_SUCCESS;
}
//
// convert Attribute value to terminal emulator
// understandable foreground color
//
switch (Attribute & 0x07) {
case EFI_BLACK:
ForegroundControl = 30;
break;
case EFI_BLUE:
ForegroundControl = 34;
break;
case EFI_GREEN:
ForegroundControl = 32;
break;
case EFI_CYAN:
ForegroundControl = 36;
break;
case EFI_RED:
ForegroundControl = 31;
break;
case EFI_MAGENTA:
ForegroundControl = 35;
break;
case EFI_BROWN:
ForegroundControl = 33;
break;
default:
case EFI_LIGHTGRAY:
ForegroundControl = 37;
break;
}
//
// bit4 of the Attribute indicates bright control
// of terminal emulator.
//
BrightControl = (UINT8) ((Attribute >> 3) & 1);
//
// convert Attribute value to terminal emulator
// understandable background color.
//
switch ((Attribute >> 4) & 0x07) {
case EFI_BLACK:
BackgroundControl = 40;
break;
case EFI_BLUE:
BackgroundControl = 44;
break;
case EFI_GREEN:
BackgroundControl = 42;
break;
case EFI_CYAN:
BackgroundControl = 46;
break;
case EFI_RED:
BackgroundControl = 41;
break;
case EFI_MAGENTA:
BackgroundControl = 45;
break;
case EFI_BROWN:
BackgroundControl = 43;
break;
default:
case EFI_LIGHTGRAY:
BackgroundControl = 47;
break;
}
//
// terminal emulator's control sequence to set attributes
//
mSetAttributeString[BRIGHT_CONTROL_OFFSET] = (CHAR16) ('0' + BrightControl);
mSetAttributeString[FOREGROUND_CONTROL_OFFSET + 0] = (CHAR16) ('0' + (ForegroundControl / 10));
mSetAttributeString[FOREGROUND_CONTROL_OFFSET + 1] = (CHAR16) ('0' + (ForegroundControl % 10));
mSetAttributeString[BACKGROUND_CONTROL_OFFSET + 0] = (CHAR16) ('0' + (BackgroundControl / 10));
mSetAttributeString[BACKGROUND_CONTROL_OFFSET + 1] = (CHAR16) ('0' + (BackgroundControl % 10));
//
// save current column and row
// for future scrolling back use.
//
SavedColumn = This->Mode->CursorColumn;
SavedRow = This->Mode->CursorRow;
TerminalDevice->OutputEscChar = TRUE;
Status = This->OutputString (This, mSetAttributeString);
TerminalDevice->OutputEscChar = FALSE;
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
//
// scroll back to saved cursor position.
//
This->Mode->CursorColumn = SavedColumn;
This->Mode->CursorRow = SavedRow;
This->Mode->Attribute = (INT32) Attribute;
return EFI_SUCCESS;
}
/**
Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.ClearScreen().
It clears the ANSI terminal's display to the
currently selected background color.
@param This Indicates the calling context.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_DEVICE_ERROR The terminal screen cannot be cleared due to serial port error.
@retval EFI_UNSUPPORTED The terminal is not in a valid display mode.
**/
EFI_STATUS
EFIAPI
TerminalConOutClearScreen (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This
)
{
EFI_STATUS Status;
TERMINAL_DEV *TerminalDevice;
TerminalDevice = TERMINAL_CON_OUT_DEV_FROM_THIS (This);
//
// control sequence for clear screen request
//
TerminalDevice->OutputEscChar = TRUE;
Status = This->OutputString (This, mClearScreenString);
TerminalDevice->OutputEscChar = FALSE;
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
Status = This->SetCursorPosition (This, 0, 0);
return Status;
}
/**
Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.SetCursorPosition().
@param This Indicates the calling context.
@param Column The row to set cursor to.
@param Row The column to set cursor to.
@retval EFI_SUCCESS The operation completed successfully.
@retval EFI_DEVICE_ERROR The request fails due to serial port error.
@retval EFI_UNSUPPORTED The terminal is not in a valid text mode, or the cursor position
is invalid for current mode.
**/
EFI_STATUS
EFIAPI
TerminalConOutSetCursorPosition (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
IN UINTN Column,
IN UINTN Row
)
{
EFI_SIMPLE_TEXT_OUTPUT_MODE *Mode;
UINTN MaxColumn;
UINTN MaxRow;
EFI_STATUS Status;
TERMINAL_DEV *TerminalDevice;
CHAR16 *String;
TerminalDevice = TERMINAL_CON_OUT_DEV_FROM_THIS (This);
//
// get current mode
//
Mode = This->Mode;
//
// get geometry of current mode
//
Status = This->QueryMode (
This,
Mode->Mode,
&MaxColumn,
&MaxRow
);
if (EFI_ERROR (Status)) {
return EFI_UNSUPPORTED;
}
if (Column >= MaxColumn || Row >= MaxRow) {
return EFI_UNSUPPORTED;
}
//
// control sequence to move the cursor
//
// Optimize cursor motion control sequences for TtyTerm. Move
// within the current line if possible, and don't output anyting if
// it isn't necessary.
//
if (TerminalDevice->TerminalType == TerminalTypeTtyTerm &&
(UINTN)Mode->CursorRow == Row) {
if ((UINTN)Mode->CursorColumn > Column) {
mCursorBackwardString[FW_BACK_OFFSET + 0] = (CHAR16) ('0' + ((Mode->CursorColumn - Column) / 10));
mCursorBackwardString[FW_BACK_OFFSET + 1] = (CHAR16) ('0' + ((Mode->CursorColumn - Column) % 10));
String = mCursorBackwardString;
}
else if (Column > (UINTN)Mode->CursorColumn) {
mCursorForwardString[FW_BACK_OFFSET + 0] = (CHAR16) ('0' + ((Column - Mode->CursorColumn) / 10));
mCursorForwardString[FW_BACK_OFFSET + 1] = (CHAR16) ('0' + ((Column - Mode->CursorColumn) % 10));
String = mCursorForwardString;
}
else {
String = L""; // No cursor motion necessary
}
}
else {
mSetCursorPositionString[ROW_OFFSET + 0] = (CHAR16) ('0' + ((Row + 1) / 10));
mSetCursorPositionString[ROW_OFFSET + 1] = (CHAR16) ('0' + ((Row + 1) % 10));
mSetCursorPositionString[COLUMN_OFFSET + 0] = (CHAR16) ('0' + ((Column + 1) / 10));
mSetCursorPositionString[COLUMN_OFFSET + 1] = (CHAR16) ('0' + ((Column + 1) % 10));
String = mSetCursorPositionString;
}
TerminalDevice->OutputEscChar = TRUE;
Status = This->OutputString (This, String);
TerminalDevice->OutputEscChar = FALSE;
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
//
// update current cursor position
// in the Mode data structure.
//
Mode->CursorColumn = (INT32) Column;
Mode->CursorRow = (INT32) Row;
return EFI_SUCCESS;
}
/**
Implements SIMPLE_TEXT_OUTPUT.EnableCursor().
In this driver, the cursor cannot be hidden.
@param This Indicates the calling context.
@param Visible If TRUE, the cursor is set to be visible,
If FALSE, the cursor is set to be invisible.
@retval EFI_SUCCESS The request is valid.
@retval EFI_UNSUPPORTED The terminal does not support cursor hidden.
**/
EFI_STATUS
EFIAPI
TerminalConOutEnableCursor (
IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
IN BOOLEAN Visible
)
{
if (!Visible) {
return EFI_UNSUPPORTED;
}
return EFI_SUCCESS;
}
/**
Detects if a Unicode char is for Box Drawing text graphics.
@param Graphic Unicode char to test.
@param PcAnsi Optional pointer to return PCANSI equivalent of
Graphic.
@param Ascii Optional pointer to return ASCII equivalent of
Graphic.
@retval TRUE If Graphic is a supported Unicode Box Drawing character.
**/
BOOLEAN
TerminalIsValidTextGraphics (
IN CHAR16 Graphic,
OUT CHAR8 *PcAnsi, OPTIONAL
OUT CHAR8 *Ascii OPTIONAL
)
{
UNICODE_TO_CHAR *Table;
if ((((Graphic & 0xff00) != 0x2500) && ((Graphic & 0xff00) != 0x2100))) {
//
// Unicode drawing code charts are all in the 0x25xx range,
// arrows are 0x21xx
//
return FALSE;
}
for (Table = UnicodeToPcAnsiOrAscii; Table->Unicode != 0x0000; Table++) {
if (Graphic == Table->Unicode) {
if (PcAnsi != NULL) {
*PcAnsi = Table->PcAnsi;
}
if (Ascii != NULL) {
*Ascii = Table->Ascii;
}
return TRUE;
}
}
return FALSE;
}
/**
Detects if a valid ASCII char.
@param Ascii An ASCII character.
@retval TRUE If it is a valid ASCII character.
@retval FALSE If it is not a valid ASCII character.
**/
BOOLEAN
TerminalIsValidAscii (
IN CHAR16 Ascii
)
{
//
// valid ascii code lies in the extent of 0x20 ~ 0x7f
//
if ((Ascii >= 0x20) && (Ascii <= 0x7f)) {
return TRUE;
}
return FALSE;
}
/**
Detects if a valid EFI control character.
@param CharC An input EFI Control character.
@retval TRUE If it is a valid EFI control character.
@retval FALSE If it is not a valid EFI control character.
**/
BOOLEAN
TerminalIsValidEfiCntlChar (
IN CHAR16 CharC
)
{
//
// only support four control characters.
//
if (CharC == CHAR_NULL ||
CharC == CHAR_BACKSPACE ||
CharC == CHAR_LINEFEED ||
CharC == CHAR_CARRIAGE_RETURN ||
CharC == CHAR_TAB
) {
return TRUE;
}
return FALSE;
}