Struct HookContext 

pub struct HookContext { /* private fields */ }

Manages hook state across render cycles for a DynamicNode.

Stores boxed Any values keyed by hook call order, enabling use_signal and similar hooks to persist state between re-renders of the same dynamic node.

Implements Copy for ergonomic use; all copies share the same underlying state.

SAFETY: The inner pointer is allocated via Box::leak and lives for the entire program. This is safe in single-threaded WASM contexts where no concurrent access can occur.

Implementations

impl HookContext

Implementation of hook context lifecycle and hook index management.

pub fn from_inner(inner: *mut HookContextInner) -> Self

Creates a new HookContext from an existing raw pointer.

Safety

The caller must ensure the pointer was allocated via Box::leak and remains valid for the entire program lifetime.

pub fn get_hook_index(&self) -> usize

Returns the current hook index.

pub fn set_hook_index(&mut self, index: usize)

Sets the hook index.

Arguments

• usize - The new hook index value.

pub fn get_hooks(&self) -> &Vec<Box<dyn Any>>

Returns a reference to the hooks storage.

pub fn get_mut_hooks(&mut self) -> &mut Vec<Box<dyn Any>>

Returns a mutable reference to the hooks storage.

pub fn get_mut_cleanups(&mut self) -> &mut Vec<Box<dyn FnOnce()>>

Returns a mutable reference to the cleanup closures storage.

pub fn reset_hook_index(&mut self)

Resets the hook index for a new render cycle.

pub fn set_arm_changed(&mut self, changed: bool)

Notifies the hook context that a match arm is being entered. Toggles the arm_changed flag; if it differs from the previous value, the hooks array is cleared to prevent signal leakage between arms.

Trait Implementations

impl Clone for HookContext

Clones the hook context, sharing the same inner state.

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for HookContext

Provides a default empty hook context.

fn default() -> Self

Returns the “default value” for a type.

impl Copy for HookContext

Copies the hook context, sharing the same inner state.

A HookContext is just a raw pointer; copying it is a trivial bitwise copy.