Struct OptionCache 

pub struct OptionCache {

    pub show_line_numbers: bool,
    pub relative_line_numbers: bool,
    pub wrap_lines: bool,
    pub sign_column: bool,
    pub ignorecase: bool,
    pub tabstop: u32,
    pub foldenable: bool,
    pub foldmethod: FoldMethod,
    pub scrolloff: u32,
    pub scroll_lines: u32,
    pub startofline: bool,
    pub sidescroll: u32,
    pub sidescrolloff: u32,
    pub completion_auto_insert_single: bool,
    pub show_whitespace: bool,
    pub current_line_highlight: bool,
    pub whitespace_tab: Option<char>,
    pub whitespace_trailing: Option<char>,
    pub whitespace_leading: Option<char>,
    pub whitespace_space: Option<char>,
    pub whitespace_eol: Option<char>,
    pub indent_guide_char: Option<char>,
    pub indent_guide_active: bool,
    pub terminal_esc_exits: bool,
    pub scrollbind: bool,
    pub content_left_pad: u32,
}

Hot-path option cache. Mirrors the typed-options registry’s resolved values for the active buffer; reads on this struct fire on every render tick, so the cache exists to skip a HashMap lookup per option. Repopulated by App::rebuild_option_cache after every :set.

Fields

show_line_numbers: bool

relative_line_numbers: bool

wrap_lines: bool

sign_column: bool

PU.1b-1a (signcolumn): whether the renderer reserves the gutter sign columns (diagnostics severity + diff sign). true (default) always reserves them so layout never shifts when a sign appears; false (help / synthetic buffers) renders gutterless. Resolved from the SignColumnOption typed option — the renderer reads only this flag, never the buffer kind.

ignorecase: bool

tabstop: u32

foldenable: bool

foldmethod: FoldMethod

scrolloff: u32

scroll_lines: u32

VM.3j-2 (:set scroll): lines <C-d> / <C-u> move. 0 means half the window.

startofline: bool

VM.3f (:set startofline): H / M / L land on the first non-blank; off keeps the cursor’s column.

sidescroll: u32

Horizontal scroll step (:set sidescroll). 0 jump-scrolls the cursor to the window centre; positive scrolls N columns.

sidescrolloff: u32

Horizontal scroll-off margin (:set sidescrolloff).

completion_auto_insert_single: bool

show_whitespace: bool

current_line_highlight: bool

whitespace_tab: Option<char>

whitespace_trailing: Option<char>

whitespace_leading: Option<char>

whitespace_space: Option<char>

whitespace_eol: Option<char>

indent_guide_char: Option<char>

IG.3: display.indent-guides.char, the glyph the TUI substitutes into a guide column. None (empty string) ⇒ the TUI draws no guides. The GPU peer paints a rule and ignores this.

indent_guide_active: bool

IG.3: display.indent-guides.active — draw the block enclosing the cursor in its own style. Whether guides exist at all is display.indent-guides, which is resolved by the worker (it changes what gets built, not how it is painted).

terminal_esc_exits: bool

Terminal-mode T2.b.0 (2026-05-25): cached terminal.esc-exits. Default true so test fixtures using Editor::default() (no init_from_linkme) get the production semantics without panicking on an unregistered option lookup.

scrollbind: bool

D.0b: cached scrollbind. Triggers rebuild_scrollbind_group via apply_option_cascade when toggled.

content_left_pad: u32

DB.4: extra leading gutter cells to horizontally centre the active buffer’s content (dashboard). (viewport_width - content_block_width)/2, recomputed on activation + resize. 0 = not centred (the default for every buffer). The renderer adds this to the gutter width so content + cursor shift right with no text mutation.

Trait Implementations

impl Clone for OptionCache

fn clone(&self) -> OptionCache

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for OptionCache

impl Debug for OptionCache

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

Formats the value using the given formatter.

impl Default for OptionCache

fn default() -> OptionCache

Returns the “default value” for a type.