ngx-context
Version:
Angular Context: Easy property binding for router outlet and nested component trees.
101 lines • 12.8 kB
JavaScript
import { __rest } from "tslib";
import { ChangeDetectionStrategy, ChangeDetectorRef, Component, Input, Optional, SkipSelf, ViewEncapsulation } from '@angular/core';
import { ReplaySubject, Subject } from 'rxjs';
import { isSubscribableOrPromise, parseKeys } from './internals';
export class ContextProviderComponent {
constructor(source) {
this.source = source;
this.initialized = false;
this._contextMap = {};
this._provide = '';
this.provided = new Map();
this.change$ = new ReplaySubject(1);
this.reset$ = new Subject();
}
set contextMap(map) {
this._contextMap = map || {};
}
get contextMap() {
return this._contextMap;
}
set provide(value) {
this._provide = value || '';
}
get provide() {
return this._provide;
}
get component() {
var _a;
return ((_a = this.source['_view']) === null || _a === void 0 ? void 0 : _a.component) || this.source['context'];
}
init() {
setTimeout(() => {
const THIS = this;
const context = new Map();
const provided = parseKeys(this.provide).filter(key => key && key in this.component);
provided.forEach(key => {
if (isSubscribableOrPromise(this.component[key])) {
this.change$.next(key);
return;
}
const propertyDescriptor = Object.getOwnPropertyDescriptor(this.component, key) ||
Object.getOwnPropertyDescriptor(this.component.__proto__, key);
this.provided.set(key, propertyDescriptor);
const { value, writable, get: getter, set: setter } = propertyDescriptor, prop = __rest(propertyDescriptor, ["value", "writable", "get", "set"]);
Object.defineProperty(this.component, key, Object.assign(Object.assign({}, prop), { get: getter
? function () {
return getter.call(this);
}
: function () {
return context.get(key);
}, set: setter
? function () {
setter.apply(this, arguments);
THIS.change$.next(key);
}
: function (newValue) {
context.set(key, newValue);
THIS.change$.next(key);
} }));
this.component[key] = value || this.component[key];
});
}, 0);
}
reset() {
this.provided.forEach((propertyDescriptor, key) => {
const value = this.component[key];
Object.defineProperty(this.component, key, propertyDescriptor);
this.component[key] = value;
});
this.provided.clear();
this.change$.next('');
this.reset$.next();
}
ngOnChanges() {
if (this.initialized) {
this.reset();
if (this.source)
this.init();
}
}
ngOnInit() {
this.initialized = true;
this.ngOnChanges();
}
}
ContextProviderComponent.decorators = [
{ type: Component, args: [{
selector: 'context-provider',
template: '<ng-content></ng-content>',
changeDetection: ChangeDetectionStrategy.OnPush,
encapsulation: ViewEncapsulation.None
},] }
];
ContextProviderComponent.ctorParameters = () => [
{ type: ChangeDetectorRef, decorators: [{ type: Optional }, { type: SkipSelf }] }
];
ContextProviderComponent.propDecorators = {
contextMap: [{ type: Input }],
provide: [{ type: Input }]
};
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{\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  Input,\n  OnChanges,\n  OnInit,\n  Optional,\n  SkipSelf,\n  ViewEncapsulation\n} from '@angular/core';\nimport { ReplaySubject, Subject } from 'rxjs';\nimport { isSubscribableOrPromise, parseKeys } from './internals';\nimport { ContextMap } from './symbols';\n\n@Component({\n  selector: 'context-provider',\n  template: '<ng-content></ng-content>',\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n})\nexport class ContextProviderComponent<T = any> implements OnChanges, OnInit {\n  private initialized = false;\n  private _contextMap: ContextMap = {};\n  private _provide: string | string[] = '';\n\n  provided = new Map();\n\n  @Input()\n  set contextMap(map: ContextMap) {\n    this._contextMap = map || {};\n  }\n  get contextMap(): ContextMap {\n    return this._contextMap;\n  }\n\n  @Input()\n  set provide(value: string | string[]) {\n    this._provide = value || '';\n  }\n  get provide(): string | string[] {\n    return this._provide;\n  }\n\n  get component(): T {\n    return this.source['_view']?.component || this.source['context']\n  }\n\n  change$ = new ReplaySubject<string>(1);\n  reset$ = new Subject<void>();\n\n  constructor(\n    @Optional()\n    @SkipSelf()\n    private source: ChangeDetectorRef,\n  ) {\n  }\n\n  private init() {\n    setTimeout(() => {\n      const THIS = this;\n      const context = new Map();\n      const provided = parseKeys(this.provide).filter(\n        key => key && key in this.component,\n      );\n\n      provided.forEach(key => {\n        if (isSubscribableOrPromise(this.component[key])) {\n          this.change$.next(key);\n          return;\n        }\n\n        const propertyDescriptor =\n          Object.getOwnPropertyDescriptor(this.component, key) ||\n          Object.getOwnPropertyDescriptor((this.component as any).__proto__, key);\n\n        this.provided.set(key, propertyDescriptor);\n\n        const { value, writable, get: getter, set: setter, ...prop } = propertyDescriptor;\n\n        Object.defineProperty(this.component, key, {\n          ...prop,\n          get: getter\n            ? function(): any {\n                return getter.call(this);\n              }\n            : function(): any {\n                return context.get(key);\n              },\n          set: setter\n            ? function() {\n                setter.apply(this, arguments);\n                THIS.change$.next(key);\n              }\n            : function(newValue: any) {\n                context.set(key, newValue);\n                THIS.change$.next(key);\n              },\n        });\n\n        this.component[key] = value || this.component[key];\n      });\n    }, 0);\n  }\n\n  private reset() {\n    this.provided.forEach((propertyDescriptor, key) => {\n      const value = this.component[key];\n\n      Object.defineProperty(this.component, key, propertyDescriptor);\n\n      this.component[key] = value;\n    });\n\n    this.provided.clear();\n    this.change$.next('');\n    this.reset$.next();\n  }\n\n  ngOnChanges() {\n    if (this.initialized) {\n      this.reset();\n\n      if (this.source) this.init();\n    }\n  }\n\n  ngOnInit() {\n    this.initialized = true;\n    this.ngOnChanges();\n  }\n}\n"]}