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Diffstat (limited to 'core/gjs/src/binding.ts')
-rw-r--r-- | core/gjs/src/binding.ts | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/core/gjs/src/binding.ts b/core/gjs/src/binding.ts deleted file mode 100644 index 95d905f..0000000 --- a/core/gjs/src/binding.ts +++ /dev/null @@ -1,89 +0,0 @@ -export const snakeify = (str: string) => str - .replace(/([a-z])([A-Z])/g, "$1_$2") - .replaceAll("-", "_") - .toLowerCase() - -export const kebabify = (str: string) => str - .replace(/([a-z])([A-Z])/g, "$1-$2") - .replaceAll("_", "-") - .toLowerCase() - -export interface Subscribable<T = unknown> { - subscribe(callback: (value: T) => void): () => void - get(): T - [key: string]: any -} - -export interface Connectable { - connect(signal: string, callback: (...args: any[]) => unknown): number - disconnect(id: number): void - [key: string]: any -} - -export default class Binding<Value> { - private transformFn = (v: any) => v - - #emitter: Subscribable<Value> | Connectable - #prop?: string - - static bind< - T extends Connectable, - P extends keyof T, - >(object: T, property: P): Binding<T[P]> - - static bind<T>(object: Subscribable<T>): Binding<T> - - static bind(emitter: Connectable | Subscribable, prop?: string) { - return new Binding(emitter, prop) - } - - private constructor(emitter: Connectable | Subscribable<Value>, prop?: string) { - this.#emitter = emitter - this.#prop = prop && kebabify(prop) - } - - toString() { - return `Binding<${this.#emitter}${this.#prop ? `, "${this.#prop}"` : ""}>` - } - - as<T>(fn: (v: Value) => T): Binding<T> { - const bind = new Binding(this.#emitter, this.#prop) - bind.transformFn = (v: Value) => fn(this.transformFn(v)) - return bind as unknown as Binding<T> - } - - get(): Value { - if (typeof this.#emitter.get === "function") - return this.transformFn(this.#emitter.get()) - - if (typeof this.#prop === "string") { - const getter = `get_${snakeify(this.#prop)}` - if (typeof this.#emitter[getter] === "function") - return this.transformFn(this.#emitter[getter]()) - - return this.transformFn(this.#emitter[this.#prop]) - } - - throw Error("can not get value of binding") - } - - subscribe(callback: (value: Value) => void): () => void { - if (typeof this.#emitter.subscribe === "function") { - return this.#emitter.subscribe(() => { - callback(this.get()) - }) - } - else if (typeof this.#emitter.connect === "function") { - const signal = `notify::${this.#prop}` - const id = this.#emitter.connect(signal, () => { - callback(this.get()) - }) - return () => { - (this.#emitter.disconnect as Connectable["disconnect"])(id) - } - } - throw Error(`${this.#emitter} is not bindable`) - } -} - -export const { bind } = Binding |