Enum Damage 

pub enum Damage {
    None,
    Lines {
        from: u32,
        to: u32,
    },
    Viewport,
    Full,
}

The dirty region of the document to refresh. A join-semilattice ordered None ⊑ Lines ⊑ Viewport ⊑ Full, so combining two damages always yields one that covers both (never less). Line ranges are inclusive [from, to]; to == u32::MAX means “to the end of the document” (used when an edit shifted every line below it).

Variants

None

Nothing changed — an idle frame reuses everything.

Lines

The inclusive line range [from, to] changed.

Fields

from: u32

to: u32

Viewport

The whole visible region must repaint (scroll / resize), but the document’s shaped content is unchanged.

Full

Everything must be recomputed (buffer swap, theme change, full reflow).

Implementations

impl Damage

pub fn line(n: u32) -> Self

A single changed line.

pub fn span(a: u32, b: u32) -> Self

An inclusive changed line span (order-normalized).

pub fn from_delta(d: LineDelta) -> Self

The changed span implied by a LineDelta: local if the line count held, otherwise to end-of-document (every line below shifted).

pub fn join(self, other: Damage) -> Damage

The lattice join: the smallest Damage covering both self and other. Widening only — the seal that keeps Damage ⊇ changed.

pub fn is_none(self) -> bool

Is there anything to repaint?

Trait Implementations

impl Clone for Damage

fn clone(&self) -> Damage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Damage

impl Debug for Damage

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

Formats the value using the given formatter.

impl Default for Damage

fn default() -> Damage

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Damage

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Damage

impl JsonSchema for Damage

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 Damage

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Damage

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 Damage