Struct FoldState 

pub struct FoldState { /* private fields */ }

Implementations

impl FoldState

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

True if line row is completely hidden (not the fold header itself).

pub fn prune_invalid(&mut self, line_count: usize)

Remove folds that reference lines beyond line_count.

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

True if line row is the header of an active fold.

pub fn toggle(&mut self, header: usize, lines: &[String])

Toggle a fold at header. If already folded, remove; otherwise detect the range from lines and add.

pub fn logical_to_visual(&self, row: usize) -> Option<usize>

Convert a logical buffer line number to a visual row index (0-based), accounting for all active folds above it.

Returns None if the line itself is hidden.

pub fn visual_to_logical(&self, visual: usize) -> usize

Convert a visual row back to a logical line number.

pub fn visible_lines<'a>(&self, lines: &'a [String]) -> Vec<(usize, &'a str)>

Collect all visible line indices from lines, in order.

pub fn folds(&self) -> &[FoldRange]

All active fold ranges (for gutter rendering).

Trait Implementations

impl Clone for FoldState

fn clone(&self) -> FoldState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FoldState

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

Formats the value using the given formatter.

impl Default for FoldState

fn default() -> FoldState

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for FoldState

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for FoldState

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.