Struct DecorationCtx 

pub struct DecorationCtx<'a> {
    pub buffer_id: BufferId,
    /* private fields */
}

Read-only context passed to crate::Mode::gutter_decorations.

Dependency inversion: the renderer builds a per-pane ServiceRegistry of typed render-state snapshots (diff sign map, LSP diagnostics, CompilationSeverityData, BuiltinSignIds, …) and each mode pulls only the data it knows about through service. The renderer therefore never depends on the crate that owns a mode, and a mode never sees another mode’s data.

Built once per pane per frame, on the render path: a gutter_decorations implementation must do nothing heavier than a map over data already computed off-thread.

Examples

use lattice_core::BufferId;
use lattice_mode::{DecorationCtx, ServiceRegistry};

struct MyMarks(Vec<u32>);

let mut services = ServiceRegistry::new();
services.register(MyMarks(vec![3, 7]));
let ctx = DecorationCtx::new(BufferId(1), &services);

assert_eq!(ctx.service::<MyMarks>().unwrap().0, vec![3, 7]);
// A snapshot nobody injected is simply absent: contribute nothing.
assert!(ctx.service::<String>().is_none());

Fields

buffer_id: BufferId

The buffer shown in the pane being decorated.

Implementations

impl<'a> DecorationCtx<'a>

pub fn new(buffer_id: BufferId, services: &'a ServiceRegistry) -> Self

Build a context over services for the pane showing buffer_id. Called by the renderers, not by modes.

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

Typed lookup of a render-state snapshot the renderer injected. None when nothing of type T was registered for this frame — a stripped render path or data not yet produced — and the mode should then contribute nothing rather than fail. Same TypeId rule as ServiceRegistry::get: look up with exactly the registered type.