Enum InsertAt 

pub enum InsertAt {
    Caret,
    FirstNonBlank,
    AfterCaret,
    LineEnd,
    OpenBelow,
    OpenAbove,
}

WHERE the caret lands when Insert mode is entered — vim’s insert-entry family (i I a A o O) as ONE typed surface.

Until 2026-08-12 the family was a single key. i was bound straight to Action::ChangeMode(Mode::Insert) and the other five did not exist — pressing A in escriba 0.1.71 moved nothing, changed no mode, and reported nothing, because an unbound Normal-mode key resolves to Action::Pending. The absence was invisible from inside: escriba --keymap lists what IS bound, so nothing named the four keys a vim user reaches for first.

Modelling the ENTRY POINT rather than the destination mode is what makes that class of omission unrepresentable. A new entry is a variant here, and Action::text_effect, Action::highlight_effect, Action::edits_prompt and the runtime’s damage classifier are all total over Action — so adding one cannot compile until every consequence has been decided.

Variants

Caret

i — insert BEFORE the caret. The caret does not move.

FirstNonBlank

I — the first non-blank character of the line.

AfterCaret

a — one column right of the caret (“append”), clamped to one past the last character so a on the final character still appends.

LineEnd

A — one column past the last character of the line.

OpenBelow

o — open a fresh line BELOW the caret’s and land on it.

OpenAbove

O — open a fresh line ABOVE the caret’s and land on it.

Implementations

impl InsertAt

pub const ALL: [Self; 6]

Every entry, so a matrix test cannot silently miss one.

pub const fn opens_a_line(self) -> bool

Does this entry ADD a line to the buffer?

o and O are the only two members of the family that change text; the other four move the caret and nothing else. Read by Action::text_effect, so the answer lives here beside the variants rather than being re-derived by each classifier that needs it.

pub const fn as_str(self) -> &'static str

The stable label — escriba --keymap, the command palette, the rc’s :action names.

Trait Implementations

impl Clone for InsertAt

fn clone(&self) -> InsertAt

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for InsertAt

impl Debug for InsertAt

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for InsertAt

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for InsertAt

impl JsonSchema for InsertAt

fn schema_name() -> String

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn is_referenceable() -> bool

Whether JSON Schemas generated for this type should be re-used where possible using the $ref keyword.

impl PartialEq for InsertAt

fn eq(&self, other: &InsertAt) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for InsertAt

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for InsertAt