* vterm

  Evil bindings for [[https://github.com/akermu/emacs-libvterm][vterm]].

  Initial state is =insert=. Normal state adds the bindings below and uses
  vterm-aware operators that respect the prompt boundary.

** Key bindings (normal state)

   | Command                                 | Original  | Evil |
   |-----------------------------------------+-----------+------|
   | =vterm-previous-prompt=                 | =C-c C-p= | =[[= |
   | =vterm-next-prompt=                     | =C-c C-n= | =]]= |
   | =vterm-yank= (paste before)             | =C-y=     | =P=  |
   | =evil-collection-vterm-paste-after=     | n/a       | =p=  |
   | =evil-collection-vterm-insert=          | n/a       | =i=  |
   | =evil-collection-vterm-insert-line=     | n/a       | =I=  |
   | =evil-collection-vterm-append=          | n/a       | =a=  |
   | =evil-collection-vterm-append-line=     | n/a       | =A=  |
   | =evil-collection-vterm-first-non-blank= | n/a       | =^=  |
   | =vterm-undo=                            | n/a       | =u=  |
   | =vterm-reset-cursor-point=              | =C-c C-r= | =G=  |

   =RET= sends to the terminal in the state named by =evil-collection-repl-submit-state=.

** Insert state

   To preserve terminal control sequences, the following are forwarded raw to
   the terminal via =vterm--self-insert=: =C-a=, =C-b=, =C-d=, =C-e=, =C-f=,
   =C-k=, =C-l=, =C-n=, =C-o=, =C-p=, =C-q=, =C-r=, =C-s=, =C-t=, =C-u=, =C-v=,
   =C-w=, =C-y=, =C-z=. =C-c= (prefix) and =C-h= (help) are not forwarded.

   =<delete>= → =vterm-send-delete=.

** New commands

   | Command                                      | Key       |                                            |
   |----------------------------------------------+-----------+--------------------------------------------|
   | =evil-collection-vterm-delete=               | =d=       | delete operator, clamped to current line   |
   | =evil-collection-vterm-delete-line=          | =D=       | delete to end-of-line                      |
   | =evil-collection-vterm-delete-char=          | =x=       | delete forward char                        |
   | =evil-collection-vterm-delete-backward-char= | =X=       | delete backward char                       |
   | =evil-collection-vterm-change=               | =c=       | change operator                            |
   | =evil-collection-vterm-change-line=          | =C=       | change to end-of-line                      |
   | =evil-collection-vterm-substitute=           | =s=       |                                            |
   | =evil-collection-vterm-substitute-line=      | =S=       |                                            |
   | =evil-collection-vterm-replace=              | =r=       |                                            |
   | =evil-collection-vterm-next-line=            | =j=       | won't move below last prompt line          |
   | =evil-collection-vterm-toggle-send-escape=   | =C-c C-z= | toggle whether =ESC= goes to vterm or evil |

** Customization

   | Variable                                 | Default | Purpose                                                |
   |------------------------------------------+---------+--------------------------------------------------------|
   | =evil-collection-vterm-move-cursor-back= | =nil=   | Move cursor back one column when leaving insert state. |