right-angled
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Lightweight and easy to use angular data grids. Integrates with your markup and styles rather than generating its own.
114 lines • 12.5 kB
JavaScript
import { Injectable } from '@angular/core';
import * as i0 from "@angular/core";
/**
* Implementation of {@link SubscriptionProxy} to work with any objects with `subscribe/unsubscribe` contracts. This contract is suitable for Observable, for example.
*/
export class PushBasedSubscriptionProxy {
/**
* Returns `true` if this proxy type can subscribe to passed object. `false` otherwise.
*/
static isAcceptable(target) {
return !!target.subscribe;
}
/**
* @inheritdoc
*/
attach(target, completeAction, errorAction) {
return target.subscribe({ error: errorAction, next: completeAction });
}
/**
* @inheritdoc
*/
detach(subscription) {
subscription.unsubscribe();
}
}
/**
* Implementation of {@link SubscriptionProxy} which works with Promise and adds ability to unsubscribe from it.
*/
export class PromiseSubscriptionProxy {
constructor() {
this.isAlive = true;
}
/**
* Returns `true` if this proxy type can subscribe to passed object. `false` otherwise.
*/
static isAcceptable(target) {
return target instanceof Promise;
}
/**
* @inheritdoc
*/
attach(target, completeAction, errorAction) {
return target.then((value) => {
if (this.isAlive) {
completeAction(value);
}
}, (error) => {
if (this.isAlive) {
errorAction(error);
}
});
}
/**
* @inheritdoc
*/
detach(subscription) {
this.isAlive = false;
}
}
/**
* Service to manage async subscriptions which acts as mediator to {@link SubscriptionProxy} contract implementations.
*/
export class AsyncSubscriber {
constructor() {
this.proxy = null;
this.lastTarget = null;
this.subscription = null;
}
/**
* @see {@link SubscriptionProxy.attach}
*/
attach(target, completeAction, errorAction) {
if (this.lastTarget !== null) {
this.destroy();
}
this.lastTarget = target;
this.proxy = this.getProxy(target);
this.subscription = this.proxy.attach(target, completeAction, errorAction);
}
/**
* Detaches from underlying subscription and destroys all internal objects.
*/
destroy() {
if (this.proxy) {
this.proxy.detach(this.subscription);
}
this.proxy = null;
this.lastTarget = null;
this.subscription = null;
}
/**
* @see {@link SubscriptionProxy.detach}
*/
detach() {
if (this.proxy) {
this.proxy.detach(this.subscription);
}
}
getProxy(target) {
if (PromiseSubscriptionProxy.isAcceptable(target)) {
return new PromiseSubscriptionProxy();
}
if (PushBasedSubscriptionProxy.isAcceptable(target)) {
return new PushBasedSubscriptionProxy();
}
throw new Error('Passed object is not subscribable');
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: AsyncSubscriber, deps: [], target: i0.ɵɵFactoryTarget.Injectable }); }
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: AsyncSubscriber }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: AsyncSubscriber, decorators: [{
type: Injectable
}] });
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This contract is suitable for Observable, for example.\r\n */\r\nexport class PushBasedSubscriptionProxy implements SubscriptionProxy {\r\n    /**\r\n     * Returns `true` if this proxy type can subscribe to passed object. `false` otherwise.\r\n     */\r\n    public static isAcceptable(target: any): boolean {\r\n        return !!target.subscribe;\r\n    }\r\n    /**\r\n     * @inheritdoc\r\n     */\r\n    public attach(target: any, completeAction: any, errorAction?: (error: any) => any): any {\r\n        return target.subscribe({ error: errorAction, next: completeAction });\r\n    }\r\n    /**\r\n     * @inheritdoc\r\n     */\r\n    public detach(subscription: any): void {\r\n        subscription.unsubscribe();\r\n    }\r\n}\r\n\r\n/**\r\n * Implementation of {@link SubscriptionProxy} which works with Promise and adds ability to unsubscribe from it.\r\n */\r\nexport class PromiseSubscriptionProxy implements SubscriptionProxy {\r\n    private isAlive = true;\r\n    /**\r\n     * Returns `true` if this proxy type can subscribe to passed object. `false` otherwise.\r\n     */\r\n    public static isAcceptable(target: any): boolean {\r\n        return target instanceof Promise;\r\n    }\r\n    /**\r\n     * @inheritdoc\r\n     */\r\n    public attach(target: Promise<any>, completeAction: (value: any) => any, errorAction?: (error: any) => any): any {\r\n        return target.then(\r\n            (value: any) => {\r\n                if (this.isAlive) {\r\n                    completeAction(value);\r\n                }\r\n            },\r\n            (error: any) => {\r\n                if (this.isAlive) {\r\n                    errorAction(error);\r\n                }\r\n            }\r\n        );\r\n    }\r\n    /**\r\n     * @inheritdoc\r\n     */\r\n    public detach(subscription: any): void {\r\n        this.isAlive = false;\r\n    }\r\n}\r\n\r\n/**\r\n * Service to manage async subscriptions which acts as mediator to {@link SubscriptionProxy} contract implementations.\r\n */\r\n@Injectable()\r\nexport class AsyncSubscriber {\r\n    private proxy: SubscriptionProxy = null;\r\n    private lastTarget: any = null;\r\n    private subscription: any = null;\r\n\r\n    /**\r\n     * @see {@link SubscriptionProxy.attach}\r\n     */\r\n    public attach(target: any, completeAction: (value: any) => any, errorAction?: (error: any) => any): void {\r\n        if (this.lastTarget !== null) {\r\n            this.destroy();\r\n        }\r\n        this.lastTarget = target;\r\n        this.proxy = this.getProxy(target);\r\n        this.subscription = this.proxy.attach(target, completeAction, errorAction);\r\n    }\r\n    /**\r\n     * Detaches from underlying subscription and destroys all internal objects.\r\n     */\r\n    public destroy(): void {\r\n        if (this.proxy) {\r\n            this.proxy.detach(this.subscription);\r\n        }\r\n        this.proxy = null;\r\n        this.lastTarget = null;\r\n        this.subscription = null;\r\n    }\r\n    /**\r\n     * @see {@link SubscriptionProxy.detach}\r\n     */\r\n    public detach(): void {\r\n        if (this.proxy) {\r\n            this.proxy.detach(this.subscription);\r\n        }\r\n    }\r\n    private getProxy(target: any): SubscriptionProxy {\r\n        if (PromiseSubscriptionProxy.isAcceptable(target)) {\r\n            return new PromiseSubscriptionProxy();\r\n        }\r\n        if (PushBasedSubscriptionProxy.isAcceptable(target)) {\r\n            return new PushBasedSubscriptionProxy();\r\n        }\r\n        throw new Error('Passed object is not subscribable');\r\n    }\r\n}\r\n"]}