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winconsole: cleanup

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Signed-off-by: Tibor Vass <tibor@docker.com>
This commit is contained in:
Tibor Vass 2015-03-22 12:55:21 -04:00
parent 9cc42dea7c
commit 4cbedb8d54
4 changed files with 261 additions and 342 deletions
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4
term/term.go
View file

@ -26,8 +26,8 @@ type Winsize struct {
y uint16
}
func StdStreams() (stdOut io.Writer, stdErr io.Writer, stdIn io.ReadCloser) {
return os.Stdout, os.Stderr, os.Stdin
func StdStreams() (stdIn io.ReadCloser, stdOut, stdErr io.Writer) {
return os.Stdin, os.Stdout, os.Stderr
}
func GetFdInfo(in interface{}) (uintptr, bool) {

5
term/term_windows.go
View file

@ -2,8 +2,9 @@
package term
import (
"github.com/docker/docker/pkg/term/winconsole"
"io"
"github.com/docker/docker/pkg/term/winconsole"
)
// State holds the console mode for the terminal.
@ -112,6 +113,6 @@ func GetFdInfo(in interface{}) (uintptr, bool) {
return winconsole.GetHandleInfo(in)
}
func StdStreams() (stdOut io.Writer, stdErr io.Writer, stdIn io.ReadCloser) {
func StdStreams() (stdIn io.ReadCloser, stdOut, stdErr io.Writer) {
return winconsole.StdStreams()
}

406
term/winconsole/console_windows.go
View file

@ -203,68 +203,70 @@ type WindowsTerminal struct {
inputEscapeSequence []byte
}
func StdStreams() (stdOut io.Writer, stdErr io.Writer, stdIn io.ReadCloser) {
func getStdHandle(stdhandle int) uintptr {
handle, err := syscall.GetStdHandle(stdhandle)
if err != nil {
panic(fmt.Errorf("could not get standard io handle %d", stdhandle))
}
return uintptr(handle)
}
func StdStreams() (stdIn io.ReadCloser, stdOut io.Writer, stdErr io.Writer) {
handler := &WindowsTerminal{
inputBuffer: make([]byte, MAX_INPUT_BUFFER),
inputEscapeSequence: []byte(KEY_ESC_CSI),
inputEvents: make([]INPUT_RECORD, MAX_INPUT_EVENTS),
}
// Save current screen buffer info
handle, err := syscall.GetStdHandle(syscall.STD_OUTPUT_HANDLE)
if nil != err {
panic("This should never happen as it is predefined handle.")
}
screenBufferInfo, err := GetConsoleScreenBufferInfo(uintptr(handle))
if err == nil {
handler.screenBufferInfo = screenBufferInfo
}
// Set the window size
SetWindowSize(uintptr(handle), DEFAULT_WIDTH, DEFAULT_HEIGHT, DEFAULT_HEIGHT)
buffer = make([]CHAR_INFO, screenBufferInfo.MaximumWindowSize.X*screenBufferInfo.MaximumWindowSize.Y)
if IsTerminal(os.Stdout.Fd()) {
stdOut = &terminalWriter{
wrappedWriter: os.Stdout,
emulator: handler,
command: make([]byte, 0, ANSI_MAX_CMD_LENGTH),
fd: uintptr(handle),
}
} else {
stdOut = os.Stdout
}
if IsTerminal(os.Stderr.Fd()) {
handle, err := syscall.GetStdHandle(syscall.STD_ERROR_HANDLE)
if nil != err {
panic("This should never happen as it is predefined handle.")
}
stdErr = &terminalWriter{
wrappedWriter: os.Stderr,
emulator: handler,
command: make([]byte, 0, ANSI_MAX_CMD_LENGTH),
fd: uintptr(handle),
}
} else {
stdErr = os.Stderr
}
if IsTerminal(os.Stdin.Fd()) {
handle, err := syscall.GetStdHandle(syscall.STD_INPUT_HANDLE)
if nil != err {
panic("This should never happen as it is predefined handle.")
}
stdIn = &terminalReader{
wrappedReader: os.Stdin,
emulator: handler,
command: make([]byte, 0, ANSI_MAX_CMD_LENGTH),
fd: uintptr(handle),
fd: getStdHandle(syscall.STD_INPUT_HANDLE),
}
} else {
stdIn = os.Stdin
}
return
if IsTerminal(os.Stdout.Fd()) {
stdoutHandle := getStdHandle(syscall.STD_OUTPUT_HANDLE)
// Save current screen buffer info
screenBufferInfo, err := GetConsoleScreenBufferInfo(stdoutHandle)
if err != nil {
// If GetConsoleScreenBufferInfo returns a nil error, it usually means that stdout is not a TTY.
// However, this is in the branch where stdout is a TTY, hence the panic.
panic("could not get console screen buffer info")
}
handler.screenBufferInfo = screenBufferInfo
// Set the window size
SetWindowSize(stdoutHandle, DEFAULT_WIDTH, DEFAULT_HEIGHT, DEFAULT_HEIGHT)
buffer = make([]CHAR_INFO, screenBufferInfo.MaximumWindowSize.X*screenBufferInfo.MaximumWindowSize.Y)
stdOut = &terminalWriter{
wrappedWriter: os.Stdout,
emulator: handler,
command: make([]byte, 0, ANSI_MAX_CMD_LENGTH),
fd: stdoutHandle,
}
} else {
stdOut = os.Stdout
}
if IsTerminal(os.Stderr.Fd()) {
stdErr = &terminalWriter{
wrappedWriter: os.Stderr,
emulator: handler,
command: make([]byte, 0, ANSI_MAX_CMD_LENGTH),
fd: getStdHandle(syscall.STD_ERROR_HANDLE),
}
} else {
stdErr = os.Stderr
}
return stdIn, stdOut, stdErr
}
// GetHandleInfo returns file descriptor and bool indicating whether the file is a terminal
@ -284,121 +286,88 @@ func GetHandleInfo(in interface{}) (uintptr, bool) {
return inFd, isTerminalIn
}
// GetConsoleMode gets the console mode for given file descriptor
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms683167(v=vs.85).aspx
func GetConsoleMode(fileDesc uintptr) (uint32, error) {
var mode uint32
err := syscall.GetConsoleMode(syscall.Handle(fileDesc), &mode)
return mode, err
}
// SetConsoleMode sets the console mode for given file descriptor
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms686033(v=vs.85).aspx
func SetConsoleMode(fileDesc uintptr, mode uint32) error {
r, _, err := setConsoleModeProc.Call(fileDesc, uintptr(mode), 0)
if r == 0 {
if err != nil {
return err
func getError(r1, r2 uintptr, lastErr error) error {
// If the function fails, the return value is zero.
if r1 == 0 {
if lastErr != nil {
return lastErr
}
return syscall.EINVAL
}
return nil
}
// GetConsoleMode gets the console mode for given file descriptor
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms683167(v=vs.85).aspx
func GetConsoleMode(handle uintptr) (uint32, error) {
var mode uint32
err := syscall.GetConsoleMode(syscall.Handle(handle), &mode)
return mode, err
}
// SetConsoleMode sets the console mode for given file descriptor
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms686033(v=vs.85).aspx
func SetConsoleMode(handle uintptr, mode uint32) error {
return getError(setConsoleModeProc.Call(handle, uintptr(mode), 0))
}
// SetCursorVisible sets the cursor visbility
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms686019(v=vs.85).aspx
func SetCursorVisible(fileDesc uintptr, isVisible BOOL) (bool, error) {
func SetCursorVisible(handle uintptr, isVisible BOOL) (bool, error) {
var cursorInfo CONSOLE_CURSOR_INFO
r, _, err := getConsoleCursorInfoProc.Call(uintptr(fileDesc), uintptr(unsafe.Pointer(&cursorInfo)), 0)
if r == 0 {
if err != nil {
if err := getError(getConsoleCursorInfoProc.Call(handle, uintptr(unsafe.Pointer(&cursorInfo)), 0)); err != nil {
return false, err
}
return false, syscall.EINVAL
}
cursorInfo.Visible = isVisible
r, _, err = setConsoleCursorInfoProc.Call(uintptr(fileDesc), uintptr(unsafe.Pointer(&cursorInfo)), 0)
if r == 0 {
if err != nil {
if err := getError(setConsoleCursorInfoProc.Call(handle, uintptr(unsafe.Pointer(&cursorInfo)), 0)); err != nil {
return false, err
}
return false, syscall.EINVAL
}
return true, nil
}
// SetWindowSize sets the size of the console window.
func SetWindowSize(fileDesc uintptr, width, height, max SHORT) (bool, error) {
func SetWindowSize(handle uintptr, width, height, max SHORT) (bool, error) {
window := SMALL_RECT{Left: 0, Top: 0, Right: width - 1, Bottom: height - 1}
coord := COORD{X: width - 1, Y: max}
r, _, err := setConsoleWindowInfoProc.Call(uintptr(fileDesc), uintptr(BOOL(1)), uintptr(unsafe.Pointer(&window)))
if r == 0 {
if err != nil {
if err := getError(setConsoleWindowInfoProc.Call(handle, uintptr(1), uintptr(unsafe.Pointer(&window)))); err != nil {
return false, err
}
return false, syscall.EINVAL
}
r, _, err = setConsoleScreenBufferSizeProc.Call(uintptr(fileDesc), uintptr(marshal(coord)))
if r == 0 {
if err != nil {
if err := getError(setConsoleScreenBufferSizeProc.Call(handle, marshal(coord))); err != nil {
return false, err
}
return false, syscall.EINVAL
}
return true, nil
}
// GetConsoleScreenBufferInfo retrieves information about the specified console screen buffer.
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms683171(v=vs.85).aspx
func GetConsoleScreenBufferInfo(fileDesc uintptr) (*CONSOLE_SCREEN_BUFFER_INFO, error) {
func GetConsoleScreenBufferInfo(handle uintptr) (*CONSOLE_SCREEN_BUFFER_INFO, error) {
var info CONSOLE_SCREEN_BUFFER_INFO
r, _, err := getConsoleScreenBufferInfoProc.Call(uintptr(fileDesc), uintptr(unsafe.Pointer(&info)), 0)
if r == 0 {
if err != nil {
if err := getError(getConsoleScreenBufferInfoProc.Call(handle, uintptr(unsafe.Pointer(&info)), 0)); err != nil {
return nil, err
}
return nil, syscall.EINVAL
}
return &info, nil
}
// setConsoleTextAttribute sets the attributes of characters written to the
// console screen buffer by the WriteFile or WriteConsole function,
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms686047(v=vs.85).aspx
func setConsoleTextAttribute(fileDesc uintptr, attribute WORD) (bool, error) {
r, _, err := setConsoleTextAttributeProc.Call(uintptr(fileDesc), uintptr(attribute), 0)
if r == 0 {
if err != nil {
return false, err
}
return false, syscall.EINVAL
}
return true, nil
func setConsoleTextAttribute(handle uintptr, attribute WORD) error {
return getError(setConsoleTextAttributeProc.Call(handle, uintptr(attribute), 0))
}
func writeConsoleOutput(fileDesc uintptr, buffer []CHAR_INFO, bufferSize COORD, bufferCoord COORD, writeRegion *SMALL_RECT) (bool, error) {
r, _, err := writeConsoleOutputProc.Call(uintptr(fileDesc), uintptr(unsafe.Pointer(&buffer[0])), uintptr(marshal(bufferSize)), uintptr(marshal(bufferCoord)), uintptr(unsafe.Pointer(writeRegion)))
if r == 0 {
if err != nil {
func writeConsoleOutput(handle uintptr, buffer []CHAR_INFO, bufferSize COORD, bufferCoord COORD, writeRegion *SMALL_RECT) (bool, error) {
if err := getError(writeConsoleOutputProc.Call(handle, uintptr(unsafe.Pointer(&buffer[0])), marshal(bufferSize), marshal(bufferCoord), uintptr(unsafe.Pointer(writeRegion)))); err != nil {
return false, err
}
return false, syscall.EINVAL
}
return true, nil
}
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms682663(v=vs.85).aspx
func fillConsoleOutputCharacter(fileDesc uintptr, fillChar byte, length uint32, writeCord COORD) (bool, error) {
func fillConsoleOutputCharacter(handle uintptr, fillChar byte, length uint32, writeCord COORD) (bool, error) {
out := int64(0)
r, _, err := fillConsoleOutputCharacterProc.Call(uintptr(fileDesc), uintptr(fillChar), uintptr(length), uintptr(marshal(writeCord)), uintptr(unsafe.Pointer(&out)))
// If the function succeeds, the return value is nonzero.
if r == 0 {
if err != nil {
if err := getError(fillConsoleOutputCharacterProc.Call(handle, uintptr(fillChar), uintptr(length), marshal(writeCord), uintptr(unsafe.Pointer(&out)))); err != nil {
return false, err
}
return false, syscall.EINVAL
}
return true, nil
}
@ -435,7 +404,7 @@ func getNumberOfChars(fromCoord COORD, toCoord COORD, screenSize COORD) uint32 {
var buffer []CHAR_INFO
func clearDisplayRect(fileDesc uintptr, fillChar rune, attributes WORD, fromCoord COORD, toCoord COORD, windowSize COORD) (bool, uint32, error) {
func clearDisplayRect(handle uintptr, fillChar rune, attributes WORD, fromCoord COORD, toCoord COORD, windowSize COORD) (uint32, error) {
var writeRegion SMALL_RECT
writeRegion.Top = fromCoord.Y
writeRegion.Left = fromCoord.X
@ -453,74 +422,60 @@ func clearDisplayRect(fileDesc uintptr, fillChar rune, attributes WORD, fromCoor
}
// Write to buffer
r, err := writeConsoleOutput(fileDesc, buffer[:size], windowSize, COORD{X: 0, Y: 0}, &writeRegion)
r, err := writeConsoleOutput(handle, buffer[:size], windowSize, COORD{X: 0, Y: 0}, &writeRegion)
if !r {
if err != nil {
return false, 0, err
return 0, err
}
return false, 0, syscall.EINVAL
return 0, syscall.EINVAL
}
}
return true, uint32(size), nil
return uint32(size), nil
}
func clearDisplayRange(fileDesc uintptr, fillChar rune, attributes WORD, fromCoord COORD, toCoord COORD, windowSize COORD) (bool, uint32, error) {
func clearDisplayRange(handle uintptr, fillChar rune, attributes WORD, fromCoord COORD, toCoord COORD, windowSize COORD) (uint32, error) {
nw := uint32(0)
// start and end on same line
if fromCoord.Y == toCoord.Y {
r, charWritten, err := clearDisplayRect(fileDesc, fillChar, attributes, fromCoord, toCoord, windowSize)
if !r {
if err != nil {
return false, charWritten, err
}
return false, charWritten, syscall.EINVAL
}
return true, charWritten, nil
return clearDisplayRect(handle, fillChar, attributes, fromCoord, toCoord, windowSize)
}
// TODO(azlinux): if full screen, optimize
// spans more than one line
if fromCoord.Y < toCoord.Y {
// from start position till end of line for first line
r, n, err := clearDisplayRect(fileDesc, fillChar, attributes, fromCoord, COORD{X: windowSize.X - 1, Y: fromCoord.Y}, windowSize)
if !r {
n, err := clearDisplayRect(handle, fillChar, attributes, fromCoord, COORD{X: windowSize.X - 1, Y: fromCoord.Y}, windowSize)
if err != nil {
return false, nw, err
}
return false, nw, syscall.EINVAL
return nw, err
}
nw += n
// lines between
linesBetween := toCoord.Y - fromCoord.Y - 1
if linesBetween > 0 {
r, n, err = clearDisplayRect(fileDesc, fillChar, attributes, COORD{X: 0, Y: fromCoord.Y + 1}, COORD{X: windowSize.X - 1, Y: toCoord.Y - 1}, windowSize)
if !r {
n, err = clearDisplayRect(handle, fillChar, attributes, COORD{X: 0, Y: fromCoord.Y + 1}, COORD{X: windowSize.X - 1, Y: toCoord.Y - 1}, windowSize)
if err != nil {
return false, nw, err
}
return false, nw, syscall.EINVAL
return nw, err
}
nw += n
}
// lines at end
r, n, err = clearDisplayRect(fileDesc, fillChar, attributes, COORD{X: 0, Y: toCoord.Y}, toCoord, windowSize)
if !r {
n, err = clearDisplayRect(handle, fillChar, attributes, COORD{X: 0, Y: toCoord.Y}, toCoord, windowSize)
if err != nil {
return false, nw, err
}
return false, nw, syscall.EINVAL
return nw, err
}
nw += n
}
return true, nw, nil
return nw, nil
}
// setConsoleCursorPosition sets the console cursor position
// Note The X and Y are zero based
// If relative is true then the new position is relative to current one
func setConsoleCursorPosition(fileDesc uintptr, isRelative bool, column int16, line int16) (bool, error) {
screenBufferInfo, err := GetConsoleScreenBufferInfo(fileDesc)
if err == nil {
func setConsoleCursorPosition(handle uintptr, isRelative bool, column int16, line int16) error {
screenBufferInfo, err := GetConsoleScreenBufferInfo(handle)
if err != nil {
return err
}
var position COORD
if isRelative {
position.X = screenBufferInfo.CursorPosition.X + SHORT(column)
@ -529,41 +484,25 @@ func setConsoleCursorPosition(fileDesc uintptr, isRelative bool, column int16, l
position.X = SHORT(column)
position.Y = SHORT(line)
}
//convert
bits := marshal(position)
r, _, err := setConsoleCursorPositionProc.Call(uintptr(fileDesc), uintptr(bits), 0)
if r == 0 {
if err != nil {
return false, err
}
return false, syscall.EINVAL
}
return true, nil
}
return false, err
return getError(setConsoleCursorPositionProc.Call(handle, marshal(position), 0))
}
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms683207(v=vs.85).aspx
func getNumberOfConsoleInputEvents(fileDesc uintptr) (uint16, error) {
func getNumberOfConsoleInputEvents(handle uintptr) (uint16, error) {
var n WORD
r, _, err := getNumberOfConsoleInputEventsProc.Call(uintptr(fileDesc), uintptr(unsafe.Pointer(&n)))
//If the function succeeds, the return value is nonzero
if r != 0 {
return uint16(n), nil
}
if err := getError(getNumberOfConsoleInputEventsProc.Call(handle, uintptr(unsafe.Pointer(&n)))); err != nil {
return 0, err
}
return uint16(n), nil
}
//http://msdn.microsoft.com/en-us/library/windows/desktop/ms684961(v=vs.85).aspx
func readConsoleInputKey(fileDesc uintptr, inputBuffer []INPUT_RECORD) (int, error) {
func readConsoleInputKey(handle uintptr, inputBuffer []INPUT_RECORD) (int, error) {
var nr WORD
r, _, err := readConsoleInputProc.Call(uintptr(fileDesc), uintptr(unsafe.Pointer(&inputBuffer[0])), uintptr(WORD(len(inputBuffer))), uintptr(unsafe.Pointer(&nr)))
//If the function succeeds, the return value is nonzero.
if r != 0 {
return int(nr), nil
if err := getError(readConsoleInputProc.Call(handle, uintptr(unsafe.Pointer(&inputBuffer[0])), uintptr(len(inputBuffer)), uintptr(unsafe.Pointer(&nr)))); err != nil {
return 0, err
}
return int(0), err
return int(nr), nil
}
func getWindowsTextAttributeForAnsiValue(originalFlag WORD, defaultValue WORD, ansiValue int16) (WORD, error) {
@ -638,25 +577,21 @@ func getWindowsTextAttributeForAnsiValue(originalFlag WORD, defaultValue WORD, a
flag = (flag & BACKGROUND_MASK_UNSET) | BACKGROUND_GREEN | BACKGROUND_BLUE
case ANSI_BACKGROUND_WHITE:
flag = (flag & BACKGROUND_MASK_UNSET) | BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE
default:
}
return flag, nil
}
// HandleOutputCommand interpretes the Ansi commands and then makes appropriate Win32 calls
func (term *WindowsTerminal) HandleOutputCommand(fd uintptr, command []byte) (n int, err error) {
func (term *WindowsTerminal) HandleOutputCommand(handle uintptr, command []byte) (n int, err error) {
// always consider all the bytes in command, processed
n = len(command)
parsedCommand := parseAnsiCommand(command)
// console settings changes need to happen in atomic way
term.outMutex.Lock()
defer term.outMutex.Unlock()
r := false
// Parse the command
parsedCommand := parseAnsiCommand(command)
// use appropriate handle
handle := syscall.Handle(fd)
switch parsedCommand.Command {
case "m":
// [Value;...;Valuem
@ -664,9 +599,9 @@ func (term *WindowsTerminal) HandleOutputCommand(fd uintptr, command []byte) (n
// Calls the graphics functions specified by the following values.
// These specified functions remain active until the next occurrence of this escape sequence.
// Graphics mode changes the colors and attributes of text (such as bold and underline) displayed on the screen.
screenBufferInfo, err := GetConsoleScreenBufferInfo(uintptr(handle))
screenBufferInfo, err := GetConsoleScreenBufferInfo(handle)
if err != nil {
return len(command), err
return n, err
}
flag := screenBufferInfo.Attributes
for _, e := range parsedCommand.Parameters {
@ -675,42 +610,40 @@ func (term *WindowsTerminal) HandleOutputCommand(fd uintptr, command []byte) (n
flag = term.screenBufferInfo.Attributes // reset
} else {
flag, err = getWindowsTextAttributeForAnsiValue(flag, term.screenBufferInfo.Attributes, int16(value))
if nil != err {
return len(command), err
if err != nil {
return n, err
}
}
}
r, err = setConsoleTextAttribute(uintptr(handle), flag)
if !r {
return len(command), err
if err := setConsoleTextAttribute(handle, flag); err != nil {
return n, err
}
case "H", "f":
// [line;columnH
// [line;columnf
// Moves the cursor to the specified position (coordinates).
// If you do not specify a position, the cursor moves to the home position at the upper-left corner of the screen (line 0, column 0).
screenBufferInfo, err := GetConsoleScreenBufferInfo(uintptr(handle))
screenBufferInfo, err := GetConsoleScreenBufferInfo(handle)
if err != nil {
return len(command), err
return n, err
}
line, err := parseInt16OrDefault(parsedCommand.getParam(0), 1)
if err != nil {
return len(command), err
return n, err
}
if line > int16(screenBufferInfo.Window.Bottom) {
line = int16(screenBufferInfo.Window.Bottom)
}
column, err := parseInt16OrDefault(parsedCommand.getParam(1), 1)
if err != nil {
return len(command), err
return n, err
}
if column > int16(screenBufferInfo.Window.Right) {
column = int16(screenBufferInfo.Window.Right)
}
// The numbers are not 0 based, but 1 based
r, err = setConsoleCursorPosition(uintptr(handle), false, int16(column-1), int16(line-1))
if !r {
return len(command), err
if err := setConsoleCursorPosition(handle, false, column-1, line-1); err != nil {
return n, err
}
case "A":
@ -721,9 +654,8 @@ func (term *WindowsTerminal) HandleOutputCommand(fd uintptr, command []byte) (n
if err != nil {
return len(command), err
}
r, err = setConsoleCursorPosition(uintptr(handle), true, 0, -1*value)
if !r {
return len(command), err
if err := setConsoleCursorPosition(handle, true, 0, -value); err != nil {
return n, err
}
case "B":
// [valueB
@ -731,11 +663,10 @@ func (term *WindowsTerminal) HandleOutputCommand(fd uintptr, command []byte) (n
// If the cursor is already on the bottom line, ignores this sequence.
value, err := parseInt16OrDefault(parsedCommand.getParam(0), 1)
if err != nil {
return len(command), err
return n, err
}
r, err = setConsoleCursorPosition(uintptr(handle), true, 0, value)
if !r {
return len(command), err
if err := setConsoleCursorPosition(handle, true, 0, value); err != nil {
return n, err
}
case "C":
// [valueC
@ -743,11 +674,10 @@ func (term *WindowsTerminal) HandleOutputCommand(fd uintptr, command []byte) (n
// If the cursor is already in the rightmost column, ignores this sequence.
value, err := parseInt16OrDefault(parsedCommand.getParam(0), 1)
if err != nil {
return len(command), err
return n, err
}
r, err = setConsoleCursorPosition(uintptr(handle), true, int16(value), 0)
if !r {
return len(command), err
if err := setConsoleCursorPosition(handle, true, value, 0); err != nil {
return n, err
}
case "D":
// [valueD
@ -755,11 +685,10 @@ func (term *WindowsTerminal) HandleOutputCommand(fd uintptr, command []byte) (n
// If the cursor is already in the leftmost column, ignores this sequence.
value, err := parseInt16OrDefault(parsedCommand.getParam(0), 1)
if err != nil {
return len(command), err
return n, err
}
r, err = setConsoleCursorPosition(uintptr(handle), true, int16(-1*value), 0)
if !r {
return len(command), err
if err := setConsoleCursorPosition(handle, true, -value, 0); err != nil {
return n, err
}
case "J":
// [J Erases from the cursor to the end of the screen, including the cursor position.
@ -768,13 +697,15 @@ func (term *WindowsTerminal) HandleOutputCommand(fd uintptr, command []byte) (n
// Clears the screen and moves the cursor to the home position (line 0, column 0).
value, err := parseInt16OrDefault(parsedCommand.getParam(0), 0)
if err != nil {
return len(command), err
return n, err
}
var start COORD
var cursor COORD
var end COORD
screenBufferInfo, err := GetConsoleScreenBufferInfo(uintptr(handle))
if err == nil {
screenBufferInfo, err := GetConsoleScreenBufferInfo(handle)
if err != nil {
return n, err
}
switch value {
case 0:
start = screenBufferInfo.CursorPosition
@ -803,15 +734,12 @@ func (term *WindowsTerminal) HandleOutputCommand(fd uintptr, command []byte) (n
cursor.X = 0
cursor.Y = 0
}
r, _, err = clearDisplayRange(uintptr(handle), ' ', term.screenBufferInfo.Attributes, start, end, screenBufferInfo.MaximumWindowSize)
if !r {
return len(command), err
if _, err := clearDisplayRange(uintptr(handle), ' ', term.screenBufferInfo.Attributes, start, end, screenBufferInfo.MaximumWindowSize); err != nil {
return n, err
}
// remember the the cursor position is 1 based
r, err = setConsoleCursorPosition(uintptr(handle), false, int16(cursor.X), int16(cursor.Y))
if !r {
return len(command), err
}
if err := setConsoleCursorPosition(handle, false, int16(cursor.X), int16(cursor.Y)); err != nil {
return n, err
}
case "K":
// [K
@ -824,7 +752,9 @@ func (term *WindowsTerminal) HandleOutputCommand(fd uintptr, command []byte) (n
var cursor COORD
var end COORD
screenBufferInfo, err := GetConsoleScreenBufferInfo(uintptr(handle))
if err == nil {
if err != nil {
return n, err
}
switch value {
case 0:
// start is where cursor is
@ -854,15 +784,12 @@ func (term *WindowsTerminal) HandleOutputCommand(fd uintptr, command []byte) (n
cursor.X = 0
cursor.Y = screenBufferInfo.MaximumWindowSize.Y - 1
}
r, _, err = clearDisplayRange(uintptr(handle), ' ', term.screenBufferInfo.Attributes, start, end, screenBufferInfo.MaximumWindowSize)
if !r {
return len(command), err
if _, err := clearDisplayRange(uintptr(handle), ' ', term.screenBufferInfo.Attributes, start, end, screenBufferInfo.MaximumWindowSize); err != nil {
return n, err
}
// remember the the cursor position is 1 based
r, err = setConsoleCursorPosition(uintptr(handle), false, int16(cursor.X), int16(cursor.Y))
if !r {
return len(command), err
}
if err := setConsoleCursorPosition(uintptr(handle), false, int16(cursor.X), int16(cursor.Y)); err != nil {
return n, err
}
case "l":
@ -875,7 +802,6 @@ func (term *WindowsTerminal) HandleOutputCommand(fd uintptr, command []byte) (n
case "?1", "1":
// If the DECCKM function is reset, then the arrow keys send ANSI cursor sequences to the host.
term.inputEscapeSequence = []byte(KEY_ESC_CSI)
default:
}
}
case "h":
@ -889,7 +815,6 @@ func (term *WindowsTerminal) HandleOutputCommand(fd uintptr, command []byte) (n
// If the DECCKM function is set, then the arrow keys send application sequences to the host.
// DECCKM (default off): When set, the cursor keys send an ESC O prefix, rather than ESC [.
term.inputEscapeSequence = []byte(KEY_ESC_O)
default:
}
}
@ -914,9 +839,8 @@ func (term *WindowsTerminal) HandleOutputCommand(fd uintptr, command []byte) (n
ESC [ 14 ; n ] Set the VESA powerdown interval in minutes.
*/
default:
}
return len(command), nil
return n, nil
}
// WriteChars writes the bytes to given writer.
@ -1059,19 +983,13 @@ func mapKeystokeToTerminalString(keyEvent *KEY_EVENT_RECORD, escapeSequence []by
// getAvailableInputEvents polls the console for availble events
// The function does not return until at least one input record has been read.
func getAvailableInputEvents(fd uintptr, inputEvents []INPUT_RECORD) (n int, err error) {
handle := syscall.Handle(fd)
if nil != err {
return 0, err
}
func getAvailableInputEvents(handle uintptr, inputEvents []INPUT_RECORD) (n int, err error) {
// TODO(azlinux): Why is there a for loop? Seems to me, that `n` cannot be negative. - tibor
for {
// Read number of console events available
nr, err := readConsoleInputKey(uintptr(handle), inputEvents)
if nr == 0 {
return 0, err
}
if 0 < nr {
return nr, nil
n, err = readConsoleInputKey(handle, inputEvents)
if err != nil || n >= 0 {
return n, err
}
}
}
@ -1112,9 +1030,9 @@ func (term *WindowsTerminal) HandleInputSequence(fd uintptr, command []byte) (n
return 0, nil
}
func marshal(c COORD) uint32 {
func marshal(c COORD) uintptr {
// works only on intel-endian machines
return uint32(uint32(uint16(c.Y))<<16 | uint32(uint16(c.X)))
return uintptr(uint32(uint32(uint16(c.Y))<<16 | uint32(uint16(c.X))))
}
// IsTerminal returns true if the given file descriptor is a terminal.

2
term/winconsole/term_emulator.go
View file

@ -211,7 +211,7 @@ func parseInt16OrDefault(s string, defaultValue int16) (n int16, err error) {
return defaultValue, nil
}
parsedValue, err := strconv.ParseInt(s, 10, 16)
if nil != err {
if err != nil {
return defaultValue, err
}
return int16(parsedValue), nil