@fbltd/async/dist/bin/dependency/observe.state.js

Miscellaneous async utils

class ObservationState {
    _isObserved = false;
    _isSuspended = false;
    dependencies = undefined;
    stack = [];
    suspend() {
        this._isSuspended = true;
    }
    cancelSuspense() {
        this._isSuspended = false;
    }
    get isObserved() {
        return this._isObserved;
    }
    set isObserved(value) {
        if (value) {
            this.push();
        }
        else {
            this.pop();
        }
        this._isObserved = !!this.dependencies;
    }
    setDep(dep) {
        if (this._isSuspended)
            return;
        if (!this.isObserved)
            return;
        if (dep.done)
            return;
        this.dependencies.add(dep);
    }
    getDeps() {
        return this.dependencies;
    }
    push() {
        this.stack.push(this.dependencies);
        this.dependencies = new Set();
    }
    pop() {
        this.dependencies = this.stack.pop();
    }
}
export const observationState = new ObservationState();