Struct WidgetId 

pub struct WidgetId(/* private fields */);

A stable 128-bit identity for widgets and lowered IR nodes.

WidgetId values are derived from BLAKE3 hashes. Two construction strategies are available:

• WidgetId::explicit hashes a user-provided stable key.
• WidgetId::derived hashes a parent identity plus a child-index path.

Example

use fission_ir::WidgetId;

let sidebar = WidgetId::explicit("sidebar");
let first_item = WidgetId::derived(sidebar.as_u128(), &[0]);
assert_ne!(sidebar, first_item);

Implementations

impl WidgetId

pub const fn from_u128(val: u128) -> WidgetId

Creates a WidgetId from a raw 128-bit value.

This is intended for internal use or deserialization. In normal code use WidgetId::explicit or WidgetId::derived instead.

pub fn as_u128(&self) -> u128

Returns the underlying 128-bit value.

pub fn explicit(key: &str) -> WidgetId

Creates a WidgetId from a user-provided stable key.

The key is hashed with BLAKE3 using the same explicit-identity domain as the original IR identity system. Keep the key stable across rebuilds when you want runtime state, focus, scroll, animation, or host-surface state to follow a widget through tree changes.

pub fn derived(parent: u128, path: &[u32]) -> WidgetId

Creates a WidgetId derived from a parent identity and child-index path.

This provides structural identity for children that do not have explicit keys. Dynamic/reorderable lists should provide explicit IDs for list items; purely structural children can use derived IDs.

Trait Implementations

impl Clone for WidgetId

fn clone(&self) -> WidgetId

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WidgetId

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for WidgetId

fn deserialize<__D>( __deserializer: __D, ) -> Result<WidgetId, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for WidgetId

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

Formats the value using the given formatter.

impl Hash for WidgetId

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for WidgetId

fn cmp(&self, other: &WidgetId) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for WidgetId

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for WidgetId

fn partial_cmp(&self, other: &WidgetId) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for WidgetId

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for WidgetId

impl Eq for WidgetId

impl StructuralPartialEq for WidgetId