Struct NativeEventHandler 

pub struct NativeEventHandler { /* private fields */ }

A wrapper around an event callback.

Stores the event name and a raw pointer to the heap-allocated callback closure.

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 NativeEventHandler

Implementation of event handler construction, cloning, and invocation.

pub fn new<F>(event_name: NativeEventName, callback: F) -> Self

where F: FnMut(NativeEvent) + 'static,

Creates a new event handler from an NativeEventName enum and callback.

Arguments

• NativeEventName - The event name enum variant.
• FnMut(NativeEvent) + 'static - The callback to invoke when the event fires.

Returns

• Self - A new event handler.

pub fn handle(&self, event: NativeEvent)

Invokes the underlying callback with the given event.

Arguments

• NativeEvent - The event to pass to the callback.

Trait Implementations

impl Clone for NativeEventHandler

Clones the event handler, sharing the underlying callback pointer.

fn clone(&self) -> Self

Returns a clone of this handler sharing the same callback pointer.

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

Performs copy-assignment from source.

impl Debug for NativeEventHandler

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

Formats the value using the given formatter.

impl From<&NativeEventHandler> for usize

Implementation of From trait for converting &NativeEventHandler into usize address.

fn from(handler: &NativeEventHandler) -> Self

Converts a reference to NativeEventHandler into its callback pointer address.

Arguments

• &NativeEventHandler - The reference to the event handler.

Returns

• usize - The memory address of the callback pointer.

impl IntoCallbackAttribute for NativeEventHandler

Converts an owned event handler into a callback attribute value.

Re-wraps the handler with a generic “callback” event name so that subsequent EventAdapter::into_attribute calls can override it with the correct DOM event type.

fn into_callback_attribute(self) -> AttributeValue

Converts this event handler into an AttributeValue::Event.

Returns

• AttributeValue - An event attribute value with a generic callback event name.