Adding additional bindings for widget.Input

[JoshPaulie]

Opening up dialog to discuss possible widget.Input bindings. I'd be happy to implement them, and already have a few on my local fork

Proposed action and accompanying shortcut

• Clear line ✅
  • Shift+Delete (up for debate)
• Backspace (Word at a time)
  • Ctrl+Backspace
• Delete forward (Word at a time)
  • Ctrl+Delete
• Move Cursor (Word at a time) ✅
  • Ctrl+Left
  • Ctrl+Right

Besides the clear line action, "these are universal shortcuts."

There's a discussion to be had here regarding what we consider universal to be. Are we treating widget.Input like we might an html input box? If so, the proposed shortcuts would qualify.

[JoshPaulie]

While trying to implement ctrl+backspace, I noticed an interesting interaction with widget.Input

• Any unbound bindings (key combinations) have no effect on Input
  • For example, ctrl+left does nothing bc it doesn't have a binding action.
• This is not the case with backspace though. ctrl+backspace and shift+backspace are functionally the same as backspace

[liancheng]

+1 for adding extra bindings. I think the Emacs-style key bindings are pretty much the standard in macOS and Linux systems. Text input widgets in almost all GUI programs support that. Would be great to support a subset of this cheatsheet: https://readline.kablamo.org/emacs.html

[davep]

(Just checking some older issues) Many more actions and bindings were added to Input in 0.11.0.

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