PSReadline breaks transparency keyboard shortcuts on Windows 10 console host

The {CTRL} + {SHIFT} + {+/-} keyboard shortcuts for the Windows 10 console host don’t work with PSReadline imported into the PowerShell session. Removing the module fixes the shortcuts, as a temporary workaround.

Cheers, Trevor Sullivan Microsoft MVP PowerShell http://trevorsullivan.net http://twitter.com/pcgeek86

[mklement0]

Here are workarounds for most of the currently unsupported shortcuts:

Set-PSReadlineKeyHandler Alt+F4 -ScriptBlock { 
  (New-Object -ComObject WScript.Shell).SendKeys('%{F4}')
}

Set-PSReadlineKeyHandler Ctrl+f -ScriptBlock { 
  (New-Object -ComObject WScript.Shell).SendKeys('^f')
}

Set-PSReadlineKeyHandler Ctrl+m -ScriptBlock { 
  (New-Object -ComObject WScript.Shell).SendKeys('^m')
}

Set-PSReadlineKeyHandler F11 -ScriptBlock { 
  (New-Object -ComObject WScript.Shell).SendKeys('{F11}')
}

Set-PSReadlineKeyHandler Ctrl+a -ScriptBlock { 
  $length = 0; $line = ''
  [Microsoft.PowerShell.PSConsoleReadLine]::GetBufferState([ref] $line, [ref] $null)
  [Microsoft.PowerShell.PSConsoleReadLine]::GetSelectionState([ref] $null, [ref] $length)
  if ($length -eq $line.Length) { # whole line already selected -> select whole scroll-back buffer
    (New-Object -ComObject WScript.Shell).SendKeys('^a')
  } else { # select whole line
    [Microsoft.PowerShell.PSConsoleReadLine]::SelectAll()
  }
}

~Given that PowerShell doesn’t seem to release references to COM objects, more work may be needed.~ [edited by @daxian-dbw, the referenced issues was closed]

The transparency-increasing/decreasing shortcuts cannot be emulated this way, because the modifier-key status is lost after the initial keypress, so that auto-repeating invocation for gradual adjustment doesn’t work, making the emulation too cumbersome to use.

However, you can at least get the functionality via different shortcut keys, as long as they don’t involve modifiers; the following definitions demonstrate that with <kbd>F9</kbd> and <kbd>F10</kbd>:

# Decrease transparency
# !! Only works with auto-repeating invocations with a shortcut *without modifiers*,
# !! because the modifier status is lost after the first .SendKeys() call.
# !! Therefore, the original shortcut, Ctrl+_ (Ctrl+Shift+Minus) cannot be used.
Set-PSReadlineKeyHandler F9 -ScriptBlock { 
  (New-Object -ComObject WScript.Shell).SendKeys('^+-')
}

# Increase transparency
# !! Only works with auto-repeating invocations with a shortcut *without modifiers*,
# !! because the modifier status is lost after the first .SendKeys() call.
# !! Therefore, the original shortcut, Ctrl++ (Ctrl+Shift+Plus) cannot be used.
Set-PSReadlineKeyHandler F10 -ScriptBlock { 
  (New-Object -ComObject WScript.Shell).SendKeys('^+{+}')
}

[daxian-dbw]

Note that <kbd>Ctrl+Shift</kbd> + “mouse wheel scrolling” works with PSReadLine. It’s a workaround for the reported issue. Given that there is nothing much can be done in PSReadLine about this, I will close this issue as external.