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Add support for more keyboard shortcuts (#410)

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Add extra key bindings to the emacs and vi modes

This patch adds the following key bindings to the emacs and vi
editing modes:
- Support for Home key sequences ^[[1~ and ^[[7~ as well as End key
  sequences ^[[4~ and ^[[8~.
- Support for arrow key sequences ^[OA, ^[OB, ^[OC and ^[OD.
- Support for the following keyboard shortcuts (if the platform
  supports the expected escape sequence):
  - Ctrl-Left Arrow:  Go back one word
  - Alt-Left Arrow:   Go back one word     (Not supported on Haiku)
  - Ctrl-Right Arrow: Go forward one word
  - Alt-Right Arrow:  Go forward one word  (Not supported on Haiku)
  - Ctrl-G:           Cancel reverse search
  - Ctrl-Delete:      Delete next word     (Not supported on Haiku)
- Added a key binding for the Insert key, which differs in the
  emacs and vi editing modes:
  - In emacs mode, Insert escapes the next character.
  - In vi mode, Insert will switch the editor to insert mode (like
    in vim).

src/cmd/ksh93/edit/{emacs,vi}.c:
- Add support for the <M-Left> and <M-Right> sequences. Like in
  bash and mksh, these shortcuts move the cursor one word backward
  or forward (like the <Ctrl-Left> and <Ctrl-Right> shortcuts).
- Only attempt to process these shortcuts if the escape sequence
  begins with $'\E[1;'.

src/cmd/ksh93/edit/vi.c:
- If the shell isn't doing a reverse search, insert the bell
  character when Ctrl+G is input.
- Add the Ctrl-Delete shortcut as an alias of 'dw'. Calling
  ed_ungetchar twice does not work for 'dw', so Ctrl-Delete was
  implemented by using a vp->del_word variable.

Co-authored-by: Martijn Dekker <martijn@inlv.org>
This commit is contained in:
Johnothan King 2022-01-31 13:09:50 -08:00 • committed by Martijn Dekker
parent 9c313c7fe3
commit 9a5af738ef
6 changed files with 334 additions and 8 deletions
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NEWS
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@ -3,6 +3,25 @@ For full details, see the git log at: https://github.com/ksh93/ksh/tree/1.0
Any uppercase BUG_* names are modernish shell bug IDs.
2022-01-31:
- Improved keyboard support for the vi and emacs built-in line editors:
- Added support for Home key sequences ^[[1~ and ^[[7~ as well as End key
sequences ^[[4~ and ^[[8~.
- Added support for arrow key sequences ^[OA, ^[OB, ^[OC and ^[OD.
- Added support for the following keyboard shortcuts (if the platform
supports the expected escape sequence):
- Ctrl-Left Arrow: Go back one word
- Alt-Left Arrow: Go back one word (Not supported on Haiku)
- Ctrl-Right Arrow: Go forward one word
- Alt-Right Arrow: Go forward one word (Not supported on Haiku)
- Ctrl-G: Cancel reverse search
- Ctrl-Delete: Delete next word (Not supported on Haiku)
- Added a keybind for the Insert key, which differs in the emacs and vi
editing modes:
- In emacs mode, Insert escapes the next character.
- In vi mode, Insert will switch the editor to insert mode (like in vim).
2022-01-28:
- Fixed longstanding job control breakage that occurred on the interactive