Struct ModeContext 

pub struct ModeContext { /* private fields */ }

Lifecycle context. Carries the current activation’s metadata + cheap-clone handles to the system registries the mode may need.

Owned, Send + 'static: the dispatcher constructs one per activation, moves it into the lifecycle future, and drops it when the future resolves.

Implementations

impl ModeContext

pub fn new( buffer_id: BufferId, current_mode: ModeId, config: Arc<ConfigRegistry>, events: Arc<EventBus>, services: Arc<ServiceRegistry>, ) -> Self

Construct a new context. Public for tests that drive mode lifecycle directly; production callers go through the registry’s activation methods which build the context internally.

pub fn service<T: Any + Send + Sync>(&self) -> Option<Arc<T>>

Typed service lookup. Used by modes that need access to subsystem handles (e.g. LspMode retrieves LspSupervisorHandle; LspLogMode retrieves BufferStoreHandle to synthesize its *lsp* buffer). Returns None when no service of type T is registered – modes should fail gracefully (log / echo) rather than panic, since tests may run a mode without wiring the service.

pub fn config(&self) -> &ConfigRegistry

Shared typed-options registry. Mutations propagate through the registry’s OptionChanged event stream the same way :set does, so subscribers fire automatically.

pub fn config_handle(&self) -> Arc<ConfigRegistry>

Cheap-clone handle to the config registry. Use when the mode needs to stash the registry inside its Guard for later mutation (e.g. restoring an option in Drop).

pub fn events(&self) -> &EventBus

Shared typed event bus.

pub fn events_handle(&self) -> Arc<EventBus>

Cheap-clone handle to the event bus. Use when the mode needs to stash the bus inside its Guard for later publish / unsubscribe (e.g. unsubscribing a subscription ID in Drop).

pub fn buffer_id(&self) -> BufferId

Buffer the activation is operating on.

pub fn current_mode(&self) -> ModeId

The mode whose lifecycle hook is currently running.