Struct JsObservable

pub struct JsObservable { /* private fields */ }

Wrapper around Observable for usage in javascript/typescript

#[derive(Clone, Default)]
#[wasm_bindgen]
pub struct CatState { cats: usize };
impl CatState {
  fn new (cats: usize) -> Self {
    CatState{cats}
  }
}
#[wasm_bindgen]
impl CatState {
  #[wasm_bindgen(getter)]
  pub fn cats(&self) -> usize {
    self.cats
  }
}

#[derive(Default, Clone, Serialize)]
pub struct Bar(pub Vec<usize>);

impl Into<JsValue> for Bar {
    fn into(self) -> JsValue {
        JsValue::from_serde(&self).unwrap()
    }
}

let obs = Observable::new(CatState::new(1));
let obsJs: JsObservable = obs.clone().into();
let lastRustCats: Rc<RefCell<Option<usize>>> = Rc::new(RefCell::new(None));
let lrc = lastRustCats.clone();
obs.subscribe(Box::new(move |v|{
  *(lrc.borrow_mut()) = Some(v.cats);
  println!("Rust Cats: {}", v.cats);
}));
// In JS:
// catStateJs.subscribe(() => console.log(`JS Cats ${catstate.cats}`));

// We are not presently firing the listener for initial state
assert_eq!(*(lastRustCats.borrow()), None);
obs.set(CatState::new(7));
assert_eq!(*(lastRustCats.borrow()), Some(7));

// Both Rust Cats and JS Cats logs are printed

let barObsJs: JsObservable = Observable::new(Bar::default()).into();
let strObsJs: JsObservable = Observable::new(String::from("Meow")).into();
let intObsJs: JsObservable = Observable::new(123).into();
let fltObsJs: JsObservable = Observable::new(123.0).into();

Implementations

impl JsObservable

pub fn new(obs: Box<dyn JsObserve>) -> Self

impl JsObservable

pub fn get(&self) -> JsValue

pub fn map(&self, cb: Function) -> JsValue

pub fn subscribe(&mut self, cb: Function) -> Function

pub fn destroy(&self)

pub fn value(&self) -> JsValue

pub fn load(&self) -> Promise

Trait Implementations

impl From<JsObservable> for JsValue

fn from(value: JsObservable) -> Self

Converts to this type from the input type.

impl<O> From<O> for JsObservable

where O: JsObserve + 'static + Sized,

fn from(obs: O) -> Self

Converts to this type from the input type.

impl FromWasmAbi for JsObservable

type Abi = u32

The Wasm ABI type that this converts from when coming back out from the ABI boundary.

unsafe fn from_abi(js: u32) -> Self

Recover a Self from Self::Abi.

impl IntoWasmAbi for JsObservable

type Abi = u32

The Wasm ABI type that this converts into when crossing the ABI boundary.

fn into_abi(self) -> u32

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary.

impl LongRefFromWasmAbi for JsObservable

type Abi = u32

Same as RefFromWasmAbi::Abi

type Anchor = RcRef<JsObservable>

Same as RefFromWasmAbi::Anchor

unsafe fn long_ref_from_abi(js: Self::Abi) -> Self::Anchor

Same as RefFromWasmAbi::ref_from_abi

impl OptionFromWasmAbi for JsObservable

fn is_none(abi: &Self::Abi) -> bool

Tests whether the argument is a “none” instance. If so it will be deserialized as None, and otherwise it will be passed to FromWasmAbi.

impl OptionIntoWasmAbi for JsObservable

fn none() -> Self::Abi

Returns an ABI instance indicating “none”, which JS will interpret as the None branch of this option.

impl RefFromWasmAbi for JsObservable

type Abi = u32

The Wasm ABI type references to Self are recovered from.

type Anchor = RcRef<JsObservable>

The type that holds the reference to Self for the duration of the invocation of the function that has an &Self parameter. This is required to ensure that the lifetimes don’t persist beyond one function call, and so that they remain anonymous.

unsafe fn ref_from_abi(js: Self::Abi) -> Self::Anchor

Recover a Self::Anchor from Self::Abi.

impl RefMutFromWasmAbi for JsObservable

type Abi = u32

Same as RefFromWasmAbi::Abi

type Anchor = RcRefMut<JsObservable>

Same as RefFromWasmAbi::Anchor

unsafe fn ref_mut_from_abi(js: Self::Abi) -> Self::Anchor

Same as RefFromWasmAbi::ref_from_abi

impl TryFromJsValue for JsObservable

type Error = JsValue

The type returned in the event of a conversion error.

fn try_from_js_value(value: JsValue) -> Result<Self, Self::Error>

Performs the conversion.

impl VectorFromWasmAbi for JsObservable

type Abi = <Box<[JsValue]> as FromWasmAbi>::Abi

unsafe fn vector_from_abi(js: Self::Abi) -> Box<[JsObservable]>

impl VectorIntoJsValue for JsObservable

fn vector_into_jsvalue(vector: Box<[JsObservable]>) -> JsValue

impl VectorIntoWasmAbi for JsObservable

type Abi = <Box<[JsValue]> as IntoWasmAbi>::Abi

fn vector_into_abi(vector: Box<[JsObservable]>) -> Self::Abi

impl WasmDescribe for JsObservable

fn describe()

impl WasmDescribeVector for JsObservable

fn describe_vector()

impl SupportsConstructor for JsObservable

impl SupportsInstanceProperty for JsObservable

impl SupportsStaticProperty for JsObservable