Struct Fold 

pub struct Fold {
    pub start_row: usize,
    pub end_row: usize,
    pub closed: bool,
    pub auto_generated: bool,
}

A contiguous range of rows that the host can collapse to a single fold-marker line.

Folds are row-range spans: [start_row, end_row] inclusive. The buffer never elides content — [crate::Buffer::lines] always returns the full logical text regardless of fold state. It is the host’s render path that skips hidden rows and replaces them with a stub.

See the folds module documentation for the full invariant description.

Fields

start_row: usize

First row of the folded range (visible when closed).

end_row: usize

Last row of the folded range, inclusive.

closed: bool

true = collapsed (rows after start_row are hidden).

auto_generated: bool

true when this fold was created by the auto-fold engine (tree-sitter foldmethod=expr). Manual folds created via zf / crate::Buffer::add_fold set this to false.

Used by crate::Buffer::set_auto_folds to distinguish auto folds (which it manages) from manual folds (which it leaves untouched).

Implementations

impl Fold

pub fn contains(&self, row: usize) -> bool

pub fn hides(&self, row: usize) -> bool

True when row is hidden by a closed fold (i.e. inside the fold but not on its start_row marker line).

pub fn line_count(&self) -> usize

Number of rows the fold spans.

Trait Implementations

impl Clone for Fold

fn clone(&self) -> Fold

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Fold

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

Formats the value using the given formatter.

impl PartialEq for Fold

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Fold

impl Eq for Fold

impl StructuralPartialEq for Fold