Enum BackendState 

pub enum BackendState {
    Textarea(TextareaBackend),
    Nvim(NvimBackend),
}

Variants

Textarea(TextareaBackend)

Nvim(NvimBackend)

Implementations

impl BackendState

pub fn is_textarea(&self) -> bool

Whether the textarea backend is active — the named form of the structural guard, for sites that only need the yes/no.

pub fn is_vim(&self) -> bool

True when the active backend is the built-in vim interpreter (any mode).

pub fn as_textarea(&self) -> Option<&TextArea<'static>>

The textarea, when it is the active backend. Textarea-only features (autocomplete, smart edits, mouse selection) guard on this.

pub fn as_textarea_mut(&mut self) -> Option<&mut TextArea<'static>>

pub fn as_nvim(&self) -> Option<&NvimBackend>

The nvim backend, when it is the active one.

pub fn text(&self) -> String

The whole buffer as one string, whichever backend holds it.

pub fn cursor(&self) -> (usize, usize)

The cursor’s (row, col), cheap on both backends — no line cloning. The nvim row is clamped to the mirrored line count (the mirror can lag the real cursor for a frame), matching the snapshot path.

pub fn recover_from_dead_nvim(&mut self) -> bool

If the nvim backend’s process has died, replace it with a textarea holding the last mirrored buffer, and report that it happened so the host can re-arm textarea-only features.

pub fn vim_sync_mouse_selection(&mut self, has_selection: bool)

Reconcile the vim engine mode after a host-driven mouse selection change. If a selection now exists and the engine is in Normal, enters Visual. If the selection is gone and the engine is in Visual/VisualLine, returns to Normal. No-op for Direct / Nvim backends.

pub fn vim_space_leads(&self) -> bool

True when a bare Space should start the leader: vim backend in Normal mode with empty pending state. False for Direct / Nvim backends and for vim Insert/Visual modes or any pending state.

pub fn vim_is_charwise_visual(&self) -> bool

True when the active backend is the vim interpreter in charwise Visual mode (not VisualLine). Used by the highlight path to extend the end col by one so the char under the cursor is visually included.

pub fn vim_reset_to_normal(&mut self)

Reset the vim interpreter to Normal mode (called when a fresh note is loaded). No-op for Direct / Nvim backends.

pub fn vim_handle_key(&mut self, key: &KeyEvent) -> Option<VimKeyOutcome>

If the active backend is the vim interpreter, run it for this key and return the outcome. Returns None for Direct / Nvim backends.

pub fn vim_pending_hint(&self) -> Option<String>

The in-progress vim command sequence (count/operator/find/g), for the footer hint. Returns None for Direct / Nvim backends, or when the vim interpreter has no pending state.

pub fn mode_label(&self) -> Option<String>

The footer modal-mode label, when the backend has one (nvim, or the vim interpreter). None for the plain Direct textarea.

pub fn modal_is_insert(&self) -> Option<bool>

Alloc-free cursor-shape classifier for the render path. None = non-modal backend (Direct textarea — leave terminal cursor as-is). Some(true) = Insert mode (bar cursor). Some(false) = other modal mode (block cursor).

pub fn from_settings( editor_backend: &EditorBackendSetting, nvim_path: Option<&PathBuf>, ) -> Self