66 lines
2 KiB
JavaScript
66 lines
2 KiB
JavaScript
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/**
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* Node utility.
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*/
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export default class ClassMethodBinder {
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target;
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classes;
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cache = new Map();
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/**
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* Constructor.
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*
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* @param target Target.
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* @param classes Classes.
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*/
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constructor(target, classes) {
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this.target = target;
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this.classes = classes;
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}
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/**
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* Binds method, getters and setters to a target.
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*
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* @param name Method name.
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*/
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bind(name) {
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// We should never bind the Symbol.iterator method as it can cause problems with Array.from()
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if (this.cache.has(name) || name === Symbol.iterator || name === 'constructor') {
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return;
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}
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this.cache.set(name, true);
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const target = this.target;
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if (!(name in target)) {
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return;
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}
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for (const _class of this.classes) {
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const descriptor = Object.getOwnPropertyDescriptor(_class.prototype, name);
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if (descriptor) {
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if (typeof descriptor.value === 'function') {
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if (descriptor.value.toString().startsWith('class ')) {
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// Do not bind classes
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return;
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}
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Object.defineProperty(target, name, {
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...descriptor,
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value: descriptor.value.bind(target)
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});
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}
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else if (descriptor.get !== undefined) {
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Object.defineProperty(target, name, {
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...descriptor,
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get: descriptor.get?.bind(target),
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set: descriptor.set?.bind(target)
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});
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}
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return;
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}
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}
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}
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/**
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* Prevents a method, getter or setter from being bound.
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*
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* @param name Method name.
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*/
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preventBinding(name) {
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this.cache.set(name, true);
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}
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}
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//# sourceMappingURL=ClassMethodBinder.js.map
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