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feat(editor): add nvim-cmp completion keymaps (#40 )

Closes #39.

nvim-cmp ships no default keymaps, so the completion menu (including the path source) appeared but nothing could navigate or accept it.

Bind the usual set in `plugins.cmp.settings.mapping`:

- `<C-n>` / `<C-p>` and `<Tab>` / `<S-Tab>` — select next/previous
- `<C-Space>` — open the menu
- `<C-e>` — abort
- `<CR>` — confirm with `select = false` (bare Enter stays a newline unless an entry is highlighted)

Documentation: `KEYBINDINGS.md` gains a completion-menu table under the Neovim section covering these keys, and the Neovim summary is reworded accordingly.

Verified by rendering the generated nvim config: the mappings emit as raw Lua (e.g. `["<CR>"] = cmp.mapping.confirm({ select = false })`), not quoted strings.

---------

Co-authored-by: Emma Thorpe <emma.thorpe@citrix.com>
Reviewed-on: #40

2026-06-23 16:33:12 +01:00

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Keybindings reference

Every keyboard shortcut configured across this desktop, and where it is defined. Everything here is managed declaratively through Nix — edit the listed file and rebuild, never the generated dotfiles.

Area	Defined in
Sway (compositor)	`sway.nix` `config.keybindings` + `config.modes`, plus the home-manager Sway module's built-in defaults
tmux	`shell.nix` `programs.tmux`
zsh line editor	`shell.nix` `programs.zsh.historySubstringSearch`
Neovim	`editor.nix` `programs.nixvim`
foot (terminal)	foot package defaults — only colours are themed (in `sway.nix`)

Conventions

Super is the Mod4 / logo (Windows/Command) key; Alt is Mod1.
Letter keys are keysyms (the character produced), not physical positions. The keyboard is Dvorak (us/dvorak), so e.g. "Super+s" is whatever key types s in Dvorak.
Shortcuts apply to every Sway host (MBP, T400, Mac Pro); brightness keys are laptop-only, as noted.

Sway

Applications & session

Shortcut	Action
`Super`+`Return`	Open a terminal (foot)
`Super`+`Space`	App launcher (sway-launcher-desktop in a floating foot)
`Super`+`d`	App launcher (same as above; module default)
`Super`+`e`	File manager (nemo)
`Super`+`c`	Clipboard history picker (clipman → fuzzel)
`Super`+`l`	Lock screen (swaylock)
`Super`+`Shift`+`q`	Close the focused window
`Super`+`Shift`+`c`	Reload the Sway config
`Super`+`Shift`+`e`	Exit Sway (asks for confirmation)

Focus

Shortcut	Action
`Super`+`←`/`↓`/`↑`/`→`	Move focus by direction
`Super`+`h`/`j`/`k`	Move focus left / down / up (vim-style)
`Super`+`a`	Focus the parent container
`Super`+`Alt`+`Space`	Toggle focus between tiling and floating

Note: vim focus-right would be Super+l, but that is bound to lock here; use Super+→.

Moving windows

Shortcut	Action
`Super`+`Shift`+`←`/`↓`/`↑`/`→`	Move the window by direction
`Super`+`Shift`+`h`/`j`/`k`/`l`	Move the window left / down / up / right
`Super`+`Shift`+`Space`	Toggle the window floating

Mouse (with Super held): left-drag moves a window, right-drag resizes it.

Layout

Shortcut	Action
`Super`+`b`	Split horizontally
`Super`+`v`	Split vertically
`Super`+`s`	Stacking layout
`Super`+`w`	Tabbed layout
`Super`+`f`	Toggle fullscreen
`Super`+`y`	Layout submenu: `s` stacking · `w` tabbed · `e` toggle split · `Return`/`Esc` exit

The layout submenu's e (toggle split) is the home for that action since Super+e now opens the file manager.

Workspaces

Shortcut	Action
`Super`+`1`…`0`	Switch to workspace 1…10
`Super`+`Shift`+`1`…`0`	Move the window to workspace 1…10
`Super`+`z`	Previous workspace
`Super`+`x`	Next workspace

Scratchpad

Shortcut	Action
`Super`+`Shift`+`-`	Move the window to the scratchpad
`Super`+`-`	Show / cycle the scratchpad

Modes (submenus)

Shortcut	Action
`Super`+`r`	Resize mode: arrow keys resize; `Return`/`Esc` exit
`Super`+`y`	Layout mode (see Layout above)
`Super`+`Shift`+`x`	Power menu: `l` lock · `e` log out · `s` sleep · `r` reboot · `Shift`+`s` shutdown · `Return`/`Esc` exit

Screenshots

Shortcut	Action
`Print`	Select a region → swappy (annotate/save)
`Shift`+`Print`	Focused window → swappy

Audio & media

Shortcut	Action
`XF86AudioRaiseVolume` / `XF86AudioLowerVolume`	Volume ±5% (wpctl)
`XF86AudioMute`	Toggle output mute
`XF86AudioMicMute`	Toggle microphone mute
`XF86AudioPlay`	Play/pause (playerctl)
`XF86AudioNext` / `XF86AudioPrev`	Next / previous track

Brightness — laptops only

Shortcut	Action
`XF86MonBrightnessUp` / `XF86MonBrightnessDown`	Backlight ±5% (brightnessctl)

Present only on portable hosts (T400, MBP); desktops have no internal backlight.

tmux

Prefix is Ctrl+b (default). Copy mode uses vi keys.

Shortcut	Action
`Ctrl`+`b` then `v`	Split into left/right panes
`Ctrl`+`b` then `s`	Split into top/bottom panes
`Ctrl`+`h`/`j`/`k`/`l`	Move between panes — and into/out of vim splits — seamlessly (vim-tmux-navigator, no prefix)
`Alt`+`←`/`→`/`↑`/`↓`	Switch pane by direction (no prefix needed)
`Ctrl`+`b` then `[`	Enter copy mode (then vi motions; `Space`/`Enter` to select/copy)
`Ctrl`+`b` then `z`	Zoom / unzoom the focused pane
`Ctrl`+`b` then `c`	New window
`Ctrl`+`b` then `n` / `p`	Next / previous window
`Ctrl`+`b` then `d`	Detach
`Ctrl`+`b` then `Ctrl`+`s` / `Ctrl`+`r`	Save / restore the session (resurrect; continuum also auto-saves and restores on start)
Mouse	Enabled — click to focus, drag borders, scroll, select

The stock split keys % and " are unbound; use v / s above. Ctrl+b then s is therefore a split, not the session tree.

Sessions persist across reboots (resurrect + continuum). Terminals auto-start tmux; NO_TMUX=1 <terminal> opens a bare shell instead.

foot (terminal)

Only colours are themed; these are foot's default key bindings.

Shortcut	Action
`Ctrl`+`Shift`+`c` / `Ctrl`+`Shift`+`v`	Copy / paste (clipboard)
`Shift`+`Insert`	Paste primary selection
`Ctrl`+`Shift`+`r`	Search scrollback
`Ctrl`+`+` / `Ctrl`+`-` / `Ctrl`+`0`	Font larger / smaller / reset
`Ctrl`+`Shift`+`u`	URL mode (jump to/open links)
`Ctrl`+`Shift`+`n`	Spawn a new terminal
`Shift`+`PageUp` / `Shift`+`PageDown`	Scroll back / forward

Neovim

Leader is Space. Ctrl+h/j/k/l is shared with tmux (see above): it moves across vim splits and tmux panes seamlessly. Everything else is stock vim, plus:

Shortcut	Action
,``,	Toggle the file tree (nvim-tree) — comma pressed twice
`Ctrl`+`h`/`j`/`k`/`l`	Move between vim splits / tmux panes (vim-tmux-navigator)
`<leader>ff`	Find files (telescope)
`<leader>fg`	Live grep (telescope)
`<leader>fb`	Switch buffer (telescope)
`<leader>xx`	Diagnostics list (trouble)
`gc` / `gcc`	Toggle comment (selection / line)
`gd`	Go to definition (LSP)
`gr`	List references (LSP)
`K`	Hover documentation (LSP)
`<leader>rn`	Rename symbol (LSP; `<leader>` is `Space`)
`<leader>ca`	Code action (LSP)

Active only while the completion popup is open (it appears as you type, e.g. file paths):

Shortcut	Action
`Tab` / `Shift`+`Tab`	Select next / previous item
`Ctrl`+`n` / `Ctrl`+`p`	Select next / previous item
`Ctrl`+`Space`	Open the completion menu
`Enter`	Confirm the highlighted item (no auto-select; otherwise a newline)
`Ctrl`+`e`	Dismiss the menu

LSP covers Nix, Lua, Python and Terraform (the work box adds C# and Helm). Files are formatted on save (conform-nvim). :Git opens fugitive; gitsigns shows gutter signs. which-key pops up after <leader> to show the rest.

zsh

Shortcut	Action
`↑` / `↓`	History substring search — type a fragment first, then the arrows cycle matching past commands

Bound for both CSI and SS3 cursor sequences, so it works in foot, iTerm2 and the Linux TTY alike.

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