Struct Options 

pub struct Options {

    pub tabstop: u32,
    pub shiftwidth: u32,
    pub expandtab: bool,
    pub softtabstop: u32,
    pub iskeyword: String,
    pub ignorecase: bool,
    pub smartcase: bool,
    pub hlsearch: bool,
    pub incsearch: bool,
    pub wrapscan: bool,
    pub autoindent: bool,
    pub smartindent: bool,
    pub timeout_len: Duration,
    pub undo_levels: u32,
    pub undo_break_on_motion: bool,
    pub readonly: bool,
    pub modifiable: bool,
    pub wrap: WrapMode,
    pub textwidth: u32,
    pub number: bool,
    pub relativenumber: bool,
    pub numberwidth: usize,
    pub cursorline: bool,
    pub cursorcolumn: bool,
    pub signcolumn: SignColumnMode,
    pub foldcolumn: u32,
    pub foldmethod: FoldMethod,
    pub foldenable: bool,
    pub foldlevelstart: u32,
    pub foldmarker: String,
    pub colorcolumn: String,
    pub formatoptions: String,
    pub filetype: String,
    pub scrolloff: usize,
    pub sidescrolloff: usize,
    pub modeline: bool,
    pub modelines: u32,
    pub autoreload: bool,
    pub motion_sneak: bool,
    pub list: bool,
    pub listchars: ListChars,
    pub indent_guides: bool,
    pub indent_guide_char: char,
    pub colorizer: bool,
    pub colorizer_filetypes: Vec<String>,
    pub format_on_save: bool,
    pub trim_trailing_whitespace: bool,
    pub rainbow_brackets: bool,
    pub updatetime: u32,
    pub matchparen: bool,
    pub fixendofline: bool,
}

Editor settings surfaced via :set. Per SPEC. Consumed once trait extraction lands; today’s legacy Settings (in [crate::editor]) continues to drive runtime behaviour.

Fields

tabstop: u32

Display width of \t for column math + render. Default 8.

shiftwidth: u32

Spaces per shift step (>>, <<, Ctrl-T, Ctrl-D).

expandtab: bool

Insert spaces (true) or literal \t (false) for the Tab key.

softtabstop: u32

Soft tab stop in spaces. When > 0, the Tab key (with expandtab) inserts spaces to the next softtabstop boundary, and Backspace at the end of a softtabstop-aligned space run deletes the whole run. 0 disables softtabstop semantics. Matches vim’s :set softtabstop.

iskeyword: String

Characters considered part of a “word” for w/b/*/#. Default "@,48-57,_,192-255" (ASCII letters, digits, _, plus extended Latin); host may override per language.

ignorecase: bool

Default false: search is case-sensitive.

smartcase: bool

When true and ignorecase is true, an uppercase letter in the pattern flips back to case-sensitive for that search.

hlsearch: bool

Highlight all matches of the last search.

incsearch: bool

Incrementally highlight matches while typing the search pattern.

wrapscan: bool

Wrap searches around the buffer ends.

autoindent: bool

Copy previous line’s leading whitespace on Enter in insert mode.

smartindent: bool

When true, bump indent by one shiftwidth after a line ending in { / ( / [, and strip one indent unit when the user types the matching } / ) / ] on an otherwise-whitespace-only line. Supersedes autoindent’s plain copy when on. Future: a tree-sitter indents.scm provider will replace the heuristic; see compute_enter_indent in vim.rs for the plug-in point.

timeout_len: Duration

Multi-key sequence timeout (e.g., <C-w>v). Vim’s timeoutlen.

undo_levels: u32

Maximum undo-tree depth. Older entries pruned.

undo_break_on_motion: bool

Break the current undo group on cursor motion in insert mode. Matches vim default; turn off to merge multi-segment edits.

readonly: bool

Reject every edit. :set ro sets this; :w! clears it.

modifiable: bool

When false, block ALL buffer modifications including entering insert/replace mode. Used for special buffers (explorer). Matches vim’s :set nomodifiable / :set noma. Default true.

wrap: WrapMode

Soft-wrap behavior for lines that exceed the viewport width. Maps directly to :set wrap / :set linebreak / :set nowrap.

textwidth: u32

Wrap column for gq{motion} text reflow. Vim’s default is 79.

number: bool

Show absolute line numbers in the gutter. Matches :set number. Default true.

relativenumber: bool

Show relative line offsets in the gutter. Combined with number, enables hybrid mode. Matches :set relativenumber. Default false.

numberwidth: usize

Minimum gutter width in cells for the line-number column. Width grows past this to fit the largest displayed number. Matches vim’s :set numberwidth / :set nuw. Default 4. Range 1..=20.

cursorline: bool

Highlight the row where the cursor sits. Matches vim’s :set cursorline.

Default true — a deliberate hjkl divergence from vim, which defaults to nocursorline. Use :set nocul to turn it off. Must stay in lockstep with crate::editor::Settings::default, which settings_default_matches_options_default pins — the two disagreed once and the Options side silently won in a fresh session.

cursorcolumn: bool

Highlight the column where the cursor sits. Matches vim’s :set cursorcolumn. Default false — vim parity (nocursorcolumn), and the same value crate::editor::Settings::default carries. Kept in lockstep by the same test as Self::cursorline.

signcolumn: SignColumnMode

Whether to reserve a 1-cell sign column for diagnostics and git signs. Matches vim’s :set signcolumn. Default SignColumnMode::Auto.

foldcolumn: u32

Number of cells reserved for a fold-marker gutter (0 = none, max 12). Matches vim’s :set foldcolumn. Default 0.

foldmethod: FoldMethod

How folds are automatically generated. Matches vim’s :set foldmethod. Default FoldMethod::Expr (tree-sitter) — diverges from vim’s manual default; functions/if/match/blocks fold when folds.scm ships. Alias fdm.

foldenable: bool

Enable auto-folds. When false, no folds are generated regardless of foldmethod. Matches vim’s :set foldenable. Alias fen. Default true.

foldlevelstart: u32

Level at which folds start open. 99 (default) means all folds open; 0 means all closed. Matches vim’s :set foldlevelstart. Alias fls.

foldmarker: String

Open/close markers for FoldMethod::Marker, as a comma-separated pair open,close. Matches vim’s :set foldmarker / fmr. Default "{{{,}}}". An invalid value (no comma, or an empty side) falls back to the default at fold-extraction time.

colorcolumn: String

Comma-separated 1-based column indices for vertical rulers. Empty string = no rulers. Matches vim’s :set colorcolumn. Default "".

formatoptions: String

Format-options flags (subset of vim’s formatoptions / fo). r — auto-continue line comments on <Enter> in insert mode. o — auto-continue line comments on o / O in normal mode. Default "ro" (both on).

filetype: String

Active filetype for the current buffer (e.g. "rust", "python"). Matches vim’s :set filetype / :set ft. Default "" (plain text).

scrolloff: usize

Minimum number of context rows kept visible above and below the cursor when scrolling. 999 (or any value ≥ half the viewport height) keeps the cursor centred. 0 disables the margin. Matches vim’s :set scrolloff / :set so. Default 5.

sidescrolloff: usize

Minimum number of context columns kept visible left and right of the cursor when scrolling horizontally (no-wrap mode only). 0 disables. Matches vim’s :set sidescrolloff / :set siso. Default 0.

modeline: bool

Enable vim modeline parsing on file open. When true, hjkl scans the first/last modelines lines for vim: / ex: / vi: markers and applies per-buffer option overrides. Matches vim’s :set modeline. Default true.

modelines: u32

Number of lines from each end to scan for vim modelines. Matches vim’s :set modelines. Default 5.

autoreload: bool

Auto-reload a clean (non-dirty) buffer when its file changes on disk (detected by :checktime / focus-regain). When false, an external change is reported as a warning and the buffer is left untouched. Matches vim’s :set autoread. Default true.

motion_sneak: bool

Enable vim-sneak style two-char digraph jump on s / S in normal mode. When true (default), s/S operate as sneak jumps rather than vim’s built-in substitute-char / substitute-line. :set nomotion_sneak reverts to standard vim behavior. Default true — BREAKING for users relying on s = substitute-char.

list: bool

Render invisible characters (tabs, trailing spaces, EOL markers). Matches vim’s :set list / :set nolist. Default false.

listchars: ListChars

Characters used to represent invisibles when list is on. Matches vim’s :set listchars / :set lcs. Default matches vim: tab:^I,eol:$.

indent_guides: bool

Render thin vertical indent guides at every shiftwidth-aligned column in the viewport. hjkl-specific option. Default true. :set noindent_guides / :set noig disables.

indent_guide_char: char

Character painted as the indent guide. Default '│'. :set indent_guide_char=<char> / :set igc=<char> to customize.

colorizer: bool

Enable inline color-literal preview (hex, rgb, hsl, named CSS colors). hjkl-specific. Default true. :set nocolorizer disables globally regardless of filetype.

colorizer_filetypes: Vec<String>

Allowlist of filetypes for which the colorizer runs. Comma-separated in :set colorizer_filetypes=css,scss,toml. Default: ["css","scss","sass","less","html","vue","svelte","tailwindcss","toml","lua","vim"].

format_on_save: bool

Run the registered hjkl-mangler formatter for the buffer’s path before each :w save. On formatter error the save is aborted. When no formatter is registered for the file extension, or the tool is not installed, the save proceeds without formatting (warn-and-fall-through for missing tool). hjkl-specific. Alias fos. Default true.

trim_trailing_whitespace: bool

Strip trailing [ \t] from every line in the buffer before each :w save. Applied in-place so post-save :e reflects the trimmed content. hjkl-specific. Alias tts. Default false.

rainbow_brackets: bool

Enable helix-style rainbow bracket coloring via tree-sitter. hjkl-specific. Alias rb. Default true.

updatetime: u32

Milliseconds of inactivity after which the swap file is written. Matches Vim’s :set updatetime / :set ut. Default 4000. hjkl-specific swap-file write cadence; does NOT affect CursorHold.

matchparen: bool

Highlight matching bracket pair under the cursor (vim matchparen). When true (default), both the bracket under the cursor and its matching partner are highlighted with the match_paren theme style. C-style brackets only: ()[]{} and <>. Alias mps. :set nomatchparen disables. hjkl-specific.

fixendofline: bool

Vim 'fixendofline' / 'fixeol'. When true (the vim default), a buffer whose last line has no terminating newline gets one added on write. When false, the file’s original end-of-line state ('endofline') is preserved byte-for-byte.

This is a plain user option — unlike 'endofline' it is NEVER derived from the file. 'endofline' is buffer-local state owned by the host (it is set from the bytes actually read), so it has no Options field; see hjkl’s save::EolState.

Implementations

impl Options

pub fn set_by_name( &mut self, name: &str, val: OptionValue, ) -> Result<(), EngineError>

Set an option by name. Vim-flavored option naming. Returns EngineError::Ex for unknown names or type-mismatched values.

Booleans accept OptionValue::Bool(_) directly or OptionValue::Int(0)/Int(non_zero). Integers accept only Int(_). Strings accept only String(_).

pub fn get_by_name(&self, name: &str) -> Option<OptionValue>

Read an option by name. None for unknown names.

Trait Implementations

impl Clone for Options

fn clone(&self) -> Options

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Options

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for Options

fn default() -> Options

Returns the “default value” for a type.

impl Eq for Options

impl PartialEq for Options

fn eq(&self, other: &Options) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Options