PSReadLine

Author(s)

• Jason Shirk

Cmdlets

Get-PSReadlineOption Set-PSReadlineOption Set-PSReadlineKeyHandler Get-PSReadlineKeyHandler Remove-PSReadlineKeyHandler

Functions

PSConsoleHostReadline

Dependencies

This module has no dependencies.

Release Notes

### Version 1.0.0.13

New features:
* Enter now does some extra validation before accepting the input.  If there are any parse
 errors or a command is not found, an error message is displayed, but you can continue editing,
 the erroneous line will not be added to history, and the error message will be cleared after
 you make an edit.
 You can press Enter a second time to force accepting the line if you choose.  

 If you don't like the new behavior for Enter, you can revert to the old behavior with:
     Set-PSReadlineKeyHandler -Key Enter -Function AcceptLine

Bug fixes:
* Occasional exception with AcceptAndGetNext (Ctrl+O) followed by something other than Enter
* Event handlers that register for the engine event PowerShell.OnIdle should work now.
* ClearScreen now scrolls the screen to preserve as much output as possible
* Fix exception on error input during rendering after certain keywords like process, begin, or end.
* Fix exception after undo from menu completion
* Support CancelLine (Ctrl+C) and Abort (Ctrl+G in emacs) to cancel DigitArgument
* History recall now ignores command lines from other currently running sessions, but you can
 still find command lines from those sessions when searching history.
* Color any non-whitespace prompt character when there is an error, not just non-characters
* ScrollDisplayToCursor works a little better now.

New functions:
* ValidateAndAcceptLine
   Validate the command line (by making sure there are no parse errors, commands all exist,
   and possibly other sorts of validation), display an error if any errors, but don't add
   the command to history and clear the error after an edit.
* DeleteCharOrExit
   - emulate Ctrl+D in bash properly by exiting the process if the command line is empty
* ScrollDisplayUpLine, ScrollDisplayDownLine
   Scroll the screen up or down by a line instead of by the screen

New key bindings:
* Ctrl+D bound to DeleteCharOrExit in Emacs mode
* Ctrl+N/Ctrl+P bound to NextHistory/PreviousHistory in Emacs mode
* Ctrl+PageUp bound to ScrollDisplayUpLine
* Ctrl+PageDown bound to ScrollDisplayDownLine
* Alt+F7 bound to ClearHistory in Windows mode

New options:
* Set-PSReadlineOption
     -ErrorForegroundColor
     -ErrorBackgroundColor
         Colors used when ValidateAndAcceptLine reports an error

     -CommandValidationHandler
         A delegate that is called from ValidateAndAcceptLine that can perform custom validation
         and also fix the command line, e.g. to correct common typos.

New cmdlet:
* Remove-PSReadlineKeyHandler
   This will remove a key binding for previously bound keys.

Breaking change:
* Demo mode removed
   - Trying to bind functions EnableDemoMode or DisableDemoMode will result in an error.

### Version 1.0.0.12

New features:
* Multi-line editing is now practical.  Home/End go to the start/end of the current line or
 start/end of the input in a reasonable way.  Up/Down arrows will move across lines if the
 input has multiple lines and you are not in the middle of recalling history.

Bug fixes:
* Color the prompt character if there is an error for any non-alphanumeric character
* Fix an issue related to undo (which was commonly hit via Escape) and using history search
* Fix a bug where PowerShell events are not written to the console until PSReadline returns
* Fixed so PowerTab now works with PSReadline
* Highlight from history search is cleared before accepting a line now.
* Fixed MenuComplete so it clears the menu (which only happened on some systems)

New functions:
* NextLine
* PreviousLine
   - These functions are added for completeness, neither is particularly useful as the usual
     bindings for UpArrow/DownArrow are smart enough to recall history or change lines
     depending on the context.

New key bindings:
* F8/Shift+F8 bound to HistorySearchBackward/HistorySearchForward in Windows mode

### Version 1.0.0.11

Bug fixes:
* Fixed MenuComplete to actually work

### Version 1.0.0.10

New features:
* Added binding Ctrl+SpaceBar to MenuComplete in Windows and Emacs modes
 - If you want to old behavior of Ctrl+Spacebar, bind it to PossibleCompletions
* Added binding Alt+. (YankLastArg) to Windows mode
* Added diagnostics when an exception occurs to help reporting bugs

Bug fixes:
* SaveHistoryPath option fixed
* Fix ShowKeyBindings to not write blank lines
* Fixed bug with undo

### Version 1.0.0.9

New features:
* MenuComplete - like an interactive show completion
* Automatically save history
   - at process exit
   - incrementally and shared across sessions
   - don't save
 See parameters HistorySaveStyle and HistorySavePath to Set-PSReadlineOption
* Added sample custom binding for quickly changing directories in SamplePSReadlineProfile.ps1

Bug fixes:
* Items loaded from history work with RevertLine
* Recalling current line after up arrow works again

### Version 1.0.0.8

New features:
* SamplePSReadlineProfile.ps1 added with examples of custom key bindings
* Word movement takes DigitArgument
* HistoryNoDuplicates now works a little differently
   - Dupicates are saved (it was a dubious memory optimization anyway)
   - Recall will recall the most recently executed item instead of the first
* When at the last word, NextWord/ForwardWord now move to the end of line instead
 of the last character of the word.
* HistorySearchBackward/HistorySearchForward changes behavior slightly:
   - use emphasis like InteractiveHistorySearch
   - cursor always moves to end like PreviousHistory/NextHistory
* New api GetSelectionState to get the current selection (if any).
* New functions:
   - SelectBackwardsLine
   - SelectLine
   - SelectAll
   - CopyOrCancelLine
* New key bindings in Windows mode:
   - Alt+0 through Alt+9 and Alt+-: DigitArgument
   - Ctrl+R/Ctrl+S for interactive history search

Bug fixes:
* Backspace after a failed interactive history search (Ctrl+R) caused searching
 to fail if you typed anything other than backspace.

### Version 1.0.0.7

New features:
* CaptureScreen - copies selected portion of screen to clipboard in text and rtf
* InvokePrompt - re-evaluate the prompt while preserving the current input
* New functions to scroll the screen w/o using the mouse:
   - ScrollScreenUp
   - ScrollScreenDown
   - ScrollScreenTop
   - ScrollScreenToCursor
* Many small bug fixes

### Version 1.0.0.6

New features:
* CharacterSearch/CharacterSearchBackward
* AcceptAndGetNext (Ctrl+O in bash)
* Get-PSReadlineKeyHandler now returns unbound functions
* Get-PSReadlineKeyHandler has 2 new parameters: -Bound and -Unbound
* Set-PSReadlineKeyHandler parameter -LongDescription is now -Description
 (not breaking because I left an alias)
* WhatIsKey - display binding for a key
* ShowKeyBindings - show all bound keys
* Keyboard selection of text for cut/copy/delete.  New functions:
 - Cut
 - Copy
 - KillRegion
 - SelectBackwardChar
 - SelectForwardChar
 - SelectBackwardWord
 - SelectForwardWord
 - SelectNextWord
 - SelectShellForwardWord
 - SelectShellBackwardWord

Breaking change:
* The properties in the output of Get-PSReadlineKeyHandler have changed.
 This is unlikely to break anyone though.

### Version 1.0.0.5

New features:
* Delimiter support in *Word functions
* DigitArgument (Alt-0,Alt-1,Alt-2,...,Alt-9,Alt--) to pass numeric arguments
* YankLastArg/YankNthArg to extract arguments from previous command lines
* History search is now case insensitive with an option to make it case sensitive

Bugs fixed:
* Shift+Backspace works like Backspace
* Ctrl+R with long search lines no longer causes big problems

Behavior change:
* Word functions now use delimiters.  The previous behavior is availble
 via a Shell*Word function, e.g. instead of KillWord, use ShellKillWord.

### Version 1.0.0.4

New features:
* Interactive history search (Ctrl+R)
* Brace matching function added (GotoBrace)
* Clear screen (Ctrl+L)

Bugs fixed:
* When showing possible completions, truncate at newline
* Prompt before showing a large number of completions
* Undo after paste works now
* Long pause after clicking on X to close powershell is now fixed

### Version 1.0.0.3

Bugs fixed:
* Removed CLR 4.5 dependency
* Fix bug where console paste didn't display everything in some cases

### Version 1.0.0.2

New features:
* Add a "demo mode" that shows keys pressed
* Add ETW event source for demo mode, key logger, macro recorder etc.
* Undo/redo
* Get-PSReadlineOption cmdlet
* Make specifying key handlers for builtins simpler
* Current un-entered line is saved and recalled when cycling through history
* Support syntax coloring of member names

Bugs fixed:
* Speed up pasting from the console
* Fix coloring of some operators
* Fix coloring in some command arguments
* Ctrl-C is handled a little better

Breaking changes:
* CLR 4.5 is now required.
* SetBufferState is gone because it doesn't support Undo/Redo

### Version 1.0.0.1

New features:
* History imported when module is loaded
* Ctrl+End/Ctrl+Home bindings emulate cmd
* Arbitrary two key chords
* Key handlers passed the invoking key and an optional argument
* Made Ding public for custom handlers
 
Bugs fixed:
* Alternate keyboards now supported
* Ctrl-C now properly emulates cmd

Breaking changes:
* MinimumHistoryCommandLength parameter removed from Set-PSReadlineOption
   - Can use this instead:
       Set-PSReadlineOption -AddToHistoryHandler { $args[0].Length -gt 3 }

### Version 1.0.0.0

Initial release