helix/book/src/keymap.md

Keymap

Normal mode

Movement

Key	Description
h	move left
j	move down
k	move up
l	move right
w	move next word start
b	move previous word start
e	move next word end
t	find 'till next char
f	find next char
T	find 'till previous char
F	find previous char
0	move to the start of the line
$	move to the end of the line
m	Jump to matching bracket
PageUp	Move page up
PageDown	Move page down
ctrl-u	Move half page up
ctrl-d	Move half page down
Tab	Switch to next view
ctrl-i	Jump forward on the jumplist TODO: conflicts tab
ctrl-o	Jump backward on the jumplist
v	Enter select (extend) mode
g	Enter goto mode
:	Enter command mode
z	Enter view mode
space	Enter space mode
K	Show documentation for the item under the cursor

Changes

Key	Description
r	replace (single character change)
i	Insert before selection
a	Insert after selection (append)
I	Insert at the start of the line
A	Insert at the end of the line
o	Open new line below selection
o	Open new line above selection
u	Undo change
U	Redo change
y	Yank selection
p	Paste after selection
P	Paste before selection
>	Indent selection
<	Unindent selection
=	Format selection
d	Delete selection
c	Change selection (delete and enter insert mode)

Selection manipulation

Key	Description
s	Select all regex matches inside selections
S	Split selection into subselections on regex matches
alt-s	Split selection on newlines
;	Collapse selection onto a single cursor
alt-;	Flip selection cursor and anchor
%	Select entire file
x	Select current line
X	Extend to next line
[	Expand selection to parent syntax node TODO: pick a key
J	join lines inside selection
K	keep selections matching the regex TODO: overlapped by hover help
space	keep only the primary selection TODO: overlapped by space mode
ctrl-c	Comment/uncomment the selections

Search

TODO: The search implementation isn't ideal yet -- we don't support searching in reverse, or searching via smartcase.

Key	Description
/	Search for regex pattern
n	Select next search match
N	Add next search match to selection
*	Use current selection as the search pattern

Select / extend mode

I'm still pondering whether to keep this mode or not. It changes movement commands to extend the existing selection instead of replacing it.

NOTE: It's a bit confusing at the moment because extend hasn't been implemented for all movement commands yet.

View mode

View mode is intended for scrolling and manipulating the view without changing the selection.

Key	Description
z , c	Vertically center the line
t	Align the line to the top of the screen
b	Align the line to the bottom of the screen
m	Align the line to the middle of the screen (horizontally)
j	Scroll the view downwards
k	Scroll the view upwards

Goto mode

Jumps to various locations.

NOTE: Some of these features are only available with the LSP present.

Key	Description
g	Go to the start of the file
e	Go to the end of the file
e	Go to definition
t	Go to type definition
r	Go to references
i	Go to implementation

Object mode

TODO: Mappings for selecting syntax nodes (a superset of [).

Space mode

This layer is a kludge of mappings I had under leader key in neovim.

Key	Description
f	Open file picker
b	Open buffer picker
v	Open a new vertical split into the current file
w	Save changes to file
c	Close the current split
space	Keep primary selection TODO: it's here because space mode replaced it