128 lines
3.8 KiB
PowerShell
128 lines
3.8 KiB
PowerShell
# readlineSync
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# https://github.com/anseki/readline-sync
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#
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# Copyright (c) 2017 anseki
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# Licensed under the MIT license.
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Param(
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[string] $display,
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[switch] $displayOnly,
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[switch] $keyIn,
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[switch] $hideEchoBack,
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[string] $mask,
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[string] $limit,
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[switch] $caseSensitive
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)
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$ErrorActionPreference = 'Stop' # for cmdlet
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trap {
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# `throw $_` and `Write-Error $_` return exit-code 0
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$Host.UI.WriteErrorLine($_)
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exit 1
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}
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function decodeArg ($arg) {
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[Regex]::Replace($arg, '#(\d+);', { [char][int] $args[0].Groups[1].Value })
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}
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$options = @{}
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foreach ($arg in @('display', 'displayOnly', 'keyIn', 'hideEchoBack', 'mask', 'limit', 'caseSensitive')) {
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$options.Add($arg, (Get-Variable $arg -ValueOnly))
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}
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$argList = New-Object string[] $options.Keys.Count
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$options.Keys.CopyTo($argList, 0)
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foreach ($arg in $argList) {
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if ($options[$arg] -is [string] -and $options[$arg])
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{ $options[$arg] = decodeArg $options[$arg] }
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}
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[string] $inputTTY = ''
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[bool] $silent = -not $options.display -and
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$options.keyIn -and $options.hideEchoBack -and -not $options.mask
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[bool] $isCooked = -not $options.hideEchoBack -and -not $options.keyIn
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# Instant method that opens TTY without CreateFile via P/Invoke in .NET Framework
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# **NOTE** Don't include special characters of DOS in $command when $getRes is True.
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# [string] $cmdPath = $Env:ComSpec
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# [string] $psPath = 'powershell.exe'
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function execWithTTY ($command, $getRes = $False, $throwError = $False) {
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if ($getRes) {
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$res = (cmd.exe /C "<CON powershell.exe -Command $command")
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if ($LastExitCode -ne 0) {
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if ($throwError) { throw $LastExitCode }
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else { exit $LastExitCode }
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}
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return $res
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} else {
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$command | cmd.exe /C ">CON powershell.exe -Command -"
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if ($LastExitCode -ne 0) {
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if ($throwError) { throw $LastExitCode }
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else { exit $LastExitCode }
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}
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}
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}
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function writeTTY ($text) {
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execWithTTY ('Write-Host (''' +
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(($text -replace '''', '''''') -replace '[\r\n]', '''+"`n"+''') + ''') -NoNewline')
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}
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if ($options.display) {
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writeTTY $options.display
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}
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if ($options.displayOnly) { return "''" }
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if (-not $options.keyIn -and $options.hideEchoBack -and $options.mask -eq '*') {
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# It fails when it's not ready.
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try {
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$inputTTY = execWithTTY ('$text = Read-Host -AsSecureString;' +
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'$bstr = [Runtime.InteropServices.Marshal]::SecureStringToBSTR($text);' +
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'[Runtime.InteropServices.Marshal]::PtrToStringAuto($bstr)') $True $True
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return '''' + $inputTTY + ''''
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} catch {} # ignore
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}
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if ($options.keyIn) { $reqSize = 1 }
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if ($options.keyIn -and $options.limit) {
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$limitPtn = '[^' + $options.limit + ']'
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}
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while ($True) {
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if (-not $isCooked) {
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$chunk = [char][int] (execWithTTY '[int] [Console]::ReadKey($True).KeyChar' $True)
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} else {
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$chunk = execWithTTY 'Read-Host' $True
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$chunk += "`n"
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}
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if ($chunk -and $chunk -match '^(.*?)[\r\n]') {
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$chunk = $Matches[1]
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$atEol = $True
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} else { $atEol = $False }
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# other ctrl-chars
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if ($chunk) { $chunk = $chunk -replace '[\x00-\x08\x0b\x0c\x0e-\x1f\x7f]', '' }
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if ($chunk -and $limitPtn) {
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if ($options.caseSensitive) { $chunk = $chunk -creplace $limitPtn, '' }
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else { $chunk = $chunk -ireplace $limitPtn, '' }
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}
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if ($chunk) {
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if (-not $isCooked) {
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if (-not $options.hideEchoBack) {
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writeTTY $chunk
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} elseif ($options.mask) {
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writeTTY ($options.mask * $chunk.Length)
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}
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}
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$inputTTY += $chunk
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}
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if ((-not $options.keyIn -and $atEol) -or
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($options.keyIn -and $inputTTY.Length -ge $reqSize)) { break }
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}
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if (-not $isCooked -and -not $silent) { execWithTTY 'Write-Host ''''' } # new line
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return "'$inputTTY'"
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