Struct FoldRegistry 

pub struct FoldRegistry { /* private fields */ }

D.3.f.0: per-Editor fold-provider registry.

One primary per FoldMethod (built-ins registered at construction); overlays added/removed by their owning subsystems (DiffSubsystem for hunk folds, multibuffer subsystem for excerpt / file-boundary folds in M.7 / M.8).

Implementations

impl FoldRegistry

pub fn with_builtins() -> Self

Construct with the five built-in primary providers already registered. Caller adds overlays as their subsystems come online.

pub fn primary(&self, method: FoldMethod) -> Option<&Arc<dyn FoldProvider>>

Look up the primary provider for method. Always returns Some for the five built-in methods; future plugin-registered methods would populate this map too.

pub fn add_overlay(&mut self, provider: Arc<dyn FoldProvider>) -> ProviderId

Register an overlay provider. Called by the FoldOverlayService when a mode activates (e.g. diff-mode::on_activate registers a HunkFoldSource, MultibufferMode its excerpt sources). Returns the provider’s ProviderId so the caller can later remove it.

pub fn remove_overlay(&mut self, id: ProviderId)

Remove the overlay with the given id. No-op if not registered.

pub fn overlays(&self) -> impl Iterator<Item = &Arc<dyn FoldProvider>>

Iterate registered overlays in registration order.

Trait Implementations

impl Debug for FoldRegistry

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

Formats the value using the given formatter.

impl Default for FoldRegistry

fn default() -> Self

Returns the “default value” for a type.