Struct FoldRegion 

pub struct FoldRegion {
    pub start_line: usize,
    pub end_line: usize,
    pub is_collapsed: bool,
    pub placeholder: String,
}

Fold region

Fields

start_line: usize

Start line number

end_line: usize

End line number (inclusive)

is_collapsed: bool

Whether folded

placeholder: String

Placeholder text shown when folded (e.g., “[…]”)

Implementations

impl FoldRegion

pub fn new(start_line: usize, end_line: usize) -> Self

Create a folding region for an inclusive line range.

pub fn with_placeholder( start_line: usize, end_line: usize, placeholder: String, ) -> Self

Create a folding region with a custom placeholder string.

pub fn expand(&mut self)

Expand

pub fn collapse(&mut self)

Collapse

pub fn toggle(&mut self)

Toggle fold state

pub fn contains_line(&self, line: usize) -> bool

Check if line number is within fold region

Trait Implementations

impl Clone for FoldRegion

fn clone(&self) -> FoldRegion

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FoldRegion

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

Formats the value using the given formatter.

impl PartialEq for FoldRegion

fn eq(&self, other: &FoldRegion) -> 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 Eq for FoldRegion

impl StructuralPartialEq for FoldRegion