Enum RendererSignal 

pub enum RendererSignal {
    ThemeChanged,
    Quit,
    NerdFontsToggled,
    LspConfigChanged(String),
    DisplayBuffer(Box<DisplayBufferRequest>),
}

Host-to-renderer side-effect signal.

v1 scope is deliberately small (see phase-5-dispatch-extraction.md §“RendererSignal scope”). Only variants with planned emission sites in the existing dispatch path are included; speculative variants (Repaint, TitleChanged) are deferred until a real need surfaces.

The renderer matches on this in its post-dispatch hook:

let outcome = self.editor.dispatch(action);
for signal in outcome.renderer_signals {
    match signal {
        RendererSignal::ThemeChanged => self.rebuild_renderer_theme(),
        RendererSignal::Quit => self.shutdown(),
    }
}

First emission sites land in sub-slices 5.5.C (Self::Quit) and 5.5.E (Self::ThemeChanged); the variants exist from 5.5.A so the type surface is fixed before any consumer composes against it.

Variants

ThemeChanged

The host’s neutral [crate::ui::theme::Theme] changed (typically via a :set ui.* cascade). The renderer should rebuild its cached typed theme mirror.

Quit

Quit requested. The renderer should begin its shutdown sequence. editor.should_quit is also set for back-compat with renderers that poll per-tick.

NerdFontsToggled

5.5.E.6: the ui.nerd_fonts cascade flipped the nerd-fonts toggle. The TUI’s file-tree rope embeds the icon glyphs, so a palette flip needs a per-file-tree-buffer rope refresh on the renderer side; oil’s renderer reads the toggle each frame and needs no rope-side work. The host emits this in addition to Self::ThemeChanged so renderers that don’t track file-tree state can ignore it without missing the theme rebuild.

LspConfigChanged(String)

5.5.E.6: the option-cascade just touched an lsp.<server_id>.* key. The renderer fans out a workspace/didChangeConfiguration to every actor matching server_id with the freshly merged subtree. The host can’t drive this without owning the LSP actor pool, which stays renderer-side through 5.5.

DisplayBuffer(Box<DisplayBufferRequest>)

5.5.F.1: a host-side do_* arm built a lattice_help::HelpContent and wants the renderer to display it under a given category (e.g. Effect::ListBuffers → HelpList, Effect::DescribeBuffer → HelpDescribe). The renderer runs its existing display_buffer dispatch: resolve the category to a lattice_core::ui::display::BufferDisplay preference, then route into the matching surface (popup, active-pane swap, split). Boxed because lattice_help::HelpContent is ~6 fields including a parsed markdown highlight cache, and most signals don’t carry one — keeping the variant small keeps the common-case Vec<RendererSignal> cheap. PartialEq / Eq derives drop on RendererSignal because lattice_help::HelpContent doesn’t implement them (the syntax-highlight cache is renderer-neutral but not value- equatable). Signals are produced at : / Effect-arm rate, not per-frame, so the Box allocation is well below any perf gate.

Trait Implementations

impl Clone for RendererSignal

fn clone(&self) -> RendererSignal

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RendererSignal

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

Formats the value using the given formatter.