142 lines
4.1 KiB
Go
142 lines
4.1 KiB
Go
// +build windows
|
|
|
|
package pb
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"os"
|
|
"sync"
|
|
"syscall"
|
|
"unsafe"
|
|
)
|
|
|
|
var tty = os.Stdin
|
|
|
|
var (
|
|
kernel32 = syscall.NewLazyDLL("kernel32.dll")
|
|
|
|
// GetConsoleScreenBufferInfo retrieves information about the
|
|
// specified console screen buffer.
|
|
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms683171(v=vs.85).aspx
|
|
procGetConsoleScreenBufferInfo = kernel32.NewProc("GetConsoleScreenBufferInfo")
|
|
|
|
// GetConsoleMode retrieves the current input mode of a console's
|
|
// input buffer or the current output mode of a console screen buffer.
|
|
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms683167(v=vs.85).aspx
|
|
getConsoleMode = kernel32.NewProc("GetConsoleMode")
|
|
|
|
// SetConsoleMode sets the input mode of a console's input buffer
|
|
// or the output mode of a console screen buffer.
|
|
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms686033(v=vs.85).aspx
|
|
setConsoleMode = kernel32.NewProc("SetConsoleMode")
|
|
|
|
// SetConsoleCursorPosition sets the cursor position in the
|
|
// specified console screen buffer.
|
|
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms686025(v=vs.85).aspx
|
|
setConsoleCursorPosition = kernel32.NewProc("SetConsoleCursorPosition")
|
|
)
|
|
|
|
type (
|
|
// Defines the coordinates of the upper left and lower right corners
|
|
// of a rectangle.
|
|
// See
|
|
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms686311(v=vs.85).aspx
|
|
smallRect struct {
|
|
Left, Top, Right, Bottom int16
|
|
}
|
|
|
|
// Defines the coordinates of a character cell in a console screen
|
|
// buffer. The origin of the coordinate system (0,0) is at the top, left cell
|
|
// of the buffer.
|
|
// See
|
|
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms682119(v=vs.85).aspx
|
|
coordinates struct {
|
|
X, Y int16
|
|
}
|
|
|
|
word int16
|
|
|
|
// Contains information about a console screen buffer.
|
|
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms682093(v=vs.85).aspx
|
|
consoleScreenBufferInfo struct {
|
|
dwSize coordinates
|
|
dwCursorPosition coordinates
|
|
wAttributes word
|
|
srWindow smallRect
|
|
dwMaximumWindowSize coordinates
|
|
}
|
|
)
|
|
|
|
// terminalWidth returns width of the terminal.
|
|
func terminalWidth() (width int, err error) {
|
|
var info consoleScreenBufferInfo
|
|
_, _, e := syscall.Syscall(procGetConsoleScreenBufferInfo.Addr(), 2, uintptr(syscall.Stdout), uintptr(unsafe.Pointer(&info)), 0)
|
|
if e != 0 {
|
|
return 0, error(e)
|
|
}
|
|
return int(info.dwSize.X) - 1, nil
|
|
}
|
|
|
|
func getCursorPos() (pos coordinates, err error) {
|
|
var info consoleScreenBufferInfo
|
|
_, _, e := syscall.Syscall(procGetConsoleScreenBufferInfo.Addr(), 2, uintptr(syscall.Stdout), uintptr(unsafe.Pointer(&info)), 0)
|
|
if e != 0 {
|
|
return info.dwCursorPosition, error(e)
|
|
}
|
|
return info.dwCursorPosition, nil
|
|
}
|
|
|
|
func setCursorPos(pos coordinates) error {
|
|
_, _, e := syscall.Syscall(setConsoleCursorPosition.Addr(), 2, uintptr(syscall.Stdout), uintptr(uint32(uint16(pos.Y))<<16|uint32(uint16(pos.X))), 0)
|
|
if e != 0 {
|
|
return error(e)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
var ErrPoolWasStarted = errors.New("Bar pool was started")
|
|
|
|
var echoLocked bool
|
|
var echoLockMutex sync.Mutex
|
|
|
|
var oldState word
|
|
|
|
func lockEcho() (shutdownCh chan struct{}, err error) {
|
|
echoLockMutex.Lock()
|
|
defer echoLockMutex.Unlock()
|
|
if echoLocked {
|
|
err = ErrPoolWasStarted
|
|
return
|
|
}
|
|
echoLocked = true
|
|
|
|
if _, _, e := syscall.Syscall(getConsoleMode.Addr(), 2, uintptr(syscall.Stdout), uintptr(unsafe.Pointer(&oldState)), 0); e != 0 {
|
|
err = fmt.Errorf("Can't get terminal settings: %v", e)
|
|
return
|
|
}
|
|
|
|
newState := oldState
|
|
const ENABLE_ECHO_INPUT = 0x0004
|
|
const ENABLE_LINE_INPUT = 0x0002
|
|
newState = newState & (^(ENABLE_LINE_INPUT | ENABLE_ECHO_INPUT))
|
|
if _, _, e := syscall.Syscall(setConsoleMode.Addr(), 2, uintptr(syscall.Stdout), uintptr(newState), 0); e != 0 {
|
|
err = fmt.Errorf("Can't set terminal settings: %v", e)
|
|
return
|
|
}
|
|
return
|
|
}
|
|
|
|
func unlockEcho() (err error) {
|
|
echoLockMutex.Lock()
|
|
defer echoLockMutex.Unlock()
|
|
if !echoLocked {
|
|
return
|
|
}
|
|
echoLocked = false
|
|
if _, _, e := syscall.Syscall(setConsoleMode.Addr(), 2, uintptr(syscall.Stdout), uintptr(oldState), 0); e != 0 {
|
|
err = fmt.Errorf("Can't set terminal settings")
|
|
}
|
|
return
|
|
}
|