@c8y/ngx-components
Version:
Angular modules for Cumulocity IoT applications
142 lines • 22.9 kB
JavaScript
import { ChangeDetectorRef, Component, ElementRef, EventEmitter, HostBinding, Input, Output, TemplateRef } from '@angular/core';
import { Paging } from '@c8y/client';
import * as i0 from "@angular/core";
import * as i1 from "@angular/common";
import * as i2 from "../i18n/c8y-translate.directive";
import * as i3 from "./icon.directive";
import * as i4 from "../i18n/c8y-translate.pipe";
export class LoadMoreComponent {
get hostClass() {
return this.hidden || (!this.hasMore && !this.hasNoMoreData) ? '' : this.class;
}
get hasMore() {
return (this.paging && (this.paging.totalPages > this.paging.currentPage || !!this.paging.nextPage));
}
get isLastPage() {
return this.paging && this.paging.totalPages === this.paging.currentPage;
}
constructor(element, cdRef) {
this.element = element;
this.cdRef = cdRef;
this.useIntersection = true;
this.hidden = false;
this.class = 'c8y-list__item';
this.maxIterations = 10;
this.hideNoMoreDataHint = false;
this.onLoad = new EventEmitter();
this.isLoading = false;
this.counter = 0;
this.hasNoMoreData = false;
this.LOAD_SAME_PAGE_THRESHOLD = 50;
this.destroyed = false;
}
ngAfterContentInit() {
this.destroyed = false;
if (this.useIntersection && 'IntersectionObserver' in window) {
this.intersectionObserver = new IntersectionObserver(event => this.buttonInView(event[0]), {
root: this.container ? this.container.nativeElement : null
});
this.intersectionObserver.observe(this.element.nativeElement);
}
this.hasNoMoreData = this.shouldShowNoMoreDataHint();
}
ngOnDestroy() {
this.destroyed = true;
if (this.intersectionObserver) {
this.intersectionObserver.disconnect();
this.intersectionObserver.unobserve(this.element.nativeElement);
clearTimeout(this.loadUntilIntersected);
}
}
async loadMore(event) {
if (!this.destroyed) {
this.isLoading = true;
this.cdRef.detectChanges();
if (event) {
event.stopPropagation();
}
if (this.hasMore) {
const result = await this.paging.next();
this.paging = result.paging;
this.onLoad.emit(result.data);
this.intersectionLoading();
this.hasNoMoreData = this.shouldShowNoMoreDataHint();
}
else {
this.counter = 0;
this.isLoading = false;
}
this.cdRef.detectChanges();
}
}
intersectionLoading() {
if (this.useIntersection && this.hasMore && this.loadUntilIntersected !== null) {
this.loadUntilIntersected = setTimeout(() => this.loadMore(), this.getLoadingThreshold());
this.useIntersection = this.shouldSwitchMode();
}
else {
this.isLoading = false;
this.loadUntilIntersected = undefined;
this.cdRef.detectChanges();
}
}
getLoadingThreshold() {
return this.LOAD_SAME_PAGE_THRESHOLD * this.counter++;
}
shouldShowNoMoreDataHint() {
return (this.counter !== 0 || this.noMoreDataHint) && !this.hasMore;
}
shouldSwitchMode() {
return this.counter < this.maxIterations || this.hidden;
}
buttonInView(event) {
if (event.isIntersecting) {
this.loadMore();
}
else if (this.loadUntilIntersected) {
clearTimeout(this.loadUntilIntersected);
this.loadUntilIntersected = null;
this.isLoading = false;
this.cdRef.detectChanges();
}
else {
// avoiding a race condition when timeout is faster
// cleared then set
this.loadUntilIntersected = null;
}
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.2.13", ngImport: i0, type: LoadMoreComponent, deps: [{ token: i0.ElementRef }, { token: i0.ChangeDetectorRef }], target: i0.ɵɵFactoryTarget.Component }); }
static { this.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "14.0.0", version: "18.2.13", type: LoadMoreComponent, selector: "c8y-load-more", inputs: { paging: "paging", useIntersection: "useIntersection", hidden: "hidden", container: "container", class: "class", maxIterations: "maxIterations", noMoreDataHint: "noMoreDataHint", loadingTemplate: "loadingTemplate", hideNoMoreDataHint: "hideNoMoreDataHint", loadNextLabel: "loadNextLabel", loadingLabel: "loadingLabel" }, outputs: { onLoad: "onLoad" }, host: { properties: { "class": "this.hostClass" } }, ngImport: i0, template: "<button\n class=\"btn btn-default btn-block text-center\"\n type=\"button\"\n title=\"{{ 'Load more' | translate }}\"\n [ngClass]=\"{ 'btn-pending': isLoading }\"\n [style.visibility]=\"hidden ? 'hidden' : 'visible'\"\n [style.height]=\"hidden ? '1px' : null\"\n (click)=\"loadMore($event)\"\n *ngIf=\"hasMore && !(loadingTemplate && isLoading)\"\n>\n <ng-container *ngIf=\"!isLoading\">\n <span *ngIf=\"loadNextLabel; else loadPage\" [innerHTML]=\"loadNextLabel | translate\"></span>\n <ng-template #loadPage>\n <span translate ngNonBindable [translateParams]=\"{ pageNo: paging.currentPage + 1 }\">\n Load page {{ pageNo }}\n </span>\n </ng-template>\n </ng-container>\n <ng-container *ngIf=\"isLoading\">\n <span *ngIf=\"loadingLabel; else loading\" [innerHTML]=\"loadingLabel | translate\"></span>\n <ng-template #loading>\n <span translate ngNonBindable [translateParams]=\"{ pageNo: paging.currentPage + 1 }\">\n Page {{ pageNo }} is loading\u2026\n </span>\n </ng-template>\n </ng-container>\n</button>\n\n<ng-container *ngIf=\"hasNoMoreData && !hideNoMoreDataHint && !isLoading\">\n <ng-container *ngTemplateOutlet=\"noMoreDataHint || finishHint\"></ng-container>\n</ng-container>\n\n<ng-template #finishHint>\n <div class=\"legend form-block center last-record\" title=\"{{ 'Last record' | translate }}\">\n <i [c8yIcon]=\"'circle'\"></i>\n </div>\n</ng-template>\n\n<ng-container *ngIf=\"loadingTemplate && isLoading\">\n <ng-container *ngTemplateOutlet=\"loadingTemplate\"></ng-container>\n</ng-container>\n", dependencies: [{ kind: "directive", type: i1.NgClass, selector: "[ngClass]", inputs: ["class", "ngClass"] }, { kind: "directive", type: i1.NgIf, selector: "[ngIf]", inputs: ["ngIf", "ngIfThen", "ngIfElse"] }, { kind: "directive", type: i1.NgTemplateOutlet, selector: "[ngTemplateOutlet]", inputs: ["ngTemplateOutletContext", "ngTemplateOutlet", "ngTemplateOutletInjector"] }, { kind: "directive", type: i2.C8yTranslateDirective, selector: "[translate],[ngx-translate]" }, { kind: "directive", type: i3.IconDirective, selector: "[c8yIcon]", inputs: ["c8yIcon"] }, { kind: "pipe", type: i4.C8yTranslatePipe, name: "translate" }] }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.2.13", ngImport: i0, type: LoadMoreComponent, decorators: [{
type: Component,
args: [{ selector: 'c8y-load-more', template: "<button\n class=\"btn btn-default btn-block text-center\"\n type=\"button\"\n title=\"{{ 'Load more' | translate }}\"\n [ngClass]=\"{ 'btn-pending': isLoading }\"\n [style.visibility]=\"hidden ? 'hidden' : 'visible'\"\n [style.height]=\"hidden ? '1px' : null\"\n (click)=\"loadMore($event)\"\n *ngIf=\"hasMore && !(loadingTemplate && isLoading)\"\n>\n <ng-container *ngIf=\"!isLoading\">\n <span *ngIf=\"loadNextLabel; else loadPage\" [innerHTML]=\"loadNextLabel | translate\"></span>\n <ng-template #loadPage>\n <span translate ngNonBindable [translateParams]=\"{ pageNo: paging.currentPage + 1 }\">\n Load page {{ pageNo }}\n </span>\n </ng-template>\n </ng-container>\n <ng-container *ngIf=\"isLoading\">\n <span *ngIf=\"loadingLabel; else loading\" [innerHTML]=\"loadingLabel | translate\"></span>\n <ng-template #loading>\n <span translate ngNonBindable [translateParams]=\"{ pageNo: paging.currentPage + 1 }\">\n Page {{ pageNo }} is loading\u2026\n </span>\n </ng-template>\n </ng-container>\n</button>\n\n<ng-container *ngIf=\"hasNoMoreData && !hideNoMoreDataHint && !isLoading\">\n <ng-container *ngTemplateOutlet=\"noMoreDataHint || finishHint\"></ng-container>\n</ng-container>\n\n<ng-template #finishHint>\n <div class=\"legend form-block center last-record\" title=\"{{ 'Last record' | translate }}\">\n <i [c8yIcon]=\"'circle'\"></i>\n </div>\n</ng-template>\n\n<ng-container *ngIf=\"loadingTemplate && isLoading\">\n <ng-container *ngTemplateOutlet=\"loadingTemplate\"></ng-container>\n</ng-container>\n" }]
}], ctorParameters: () => [{ type: i0.ElementRef }, { type: i0.ChangeDetectorRef }], propDecorators: { paging: [{
type: Input
}], useIntersection: [{
type: Input
}], hidden: [{
type: Input
}], container: [{
type: Input
}], class: [{
type: Input
}], maxIterations: [{
type: Input
}], noMoreDataHint: [{
type: Input
}], loadingTemplate: [{
type: Input
}], hideNoMoreDataHint: [{
type: Input
}], loadNextLabel: [{
type: Input
}], loadingLabel: [{
type: Input
}], onLoad: [{
type: Output
}], hostClass: [{
type: HostBinding,
args: ['class']
}] } });
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{\n  ChangeDetectorRef,\n  Component,\n  ElementRef,\n  EventEmitter,\n  HostBinding,\n  Input,\n  Output,\n  TemplateRef\n} from '@angular/core';\nimport { IIdentified, Paging } from '@c8y/client';\n\n@Component({\n  selector: 'c8y-load-more',\n  templateUrl: './load-more.component.html'\n})\nexport class LoadMoreComponent {\n  @Input()\n  paging: Paging<any>;\n  @Input()\n  useIntersection = true;\n  @Input()\n  hidden = false;\n  @Input()\n  container: ElementRef;\n  @Input()\n  class = 'c8y-list__item';\n  @Input()\n  maxIterations = 10;\n  @Input()\n  noMoreDataHint: TemplateRef<any>;\n  @Input()\n  loadingTemplate: TemplateRef<any>;\n  @Input()\n  hideNoMoreDataHint = false;\n  @Input()\n  loadNextLabel: string;\n  @Input()\n  loadingLabel: string;\n  @Output()\n  onLoad = new EventEmitter<IIdentified>();\n\n  isLoading = false;\n  counter = 0;\n  hasNoMoreData = false;\n  private loadUntilIntersected;\n  private readonly LOAD_SAME_PAGE_THRESHOLD = 50;\n  private intersectionObserver: IntersectionObserver;\n  private destroyed = false;\n\n  @HostBinding('class')\n  get hostClass() {\n    return this.hidden || (!this.hasMore && !this.hasNoMoreData) ? '' : this.class;\n  }\n\n  get hasMore() {\n    return (\n      this.paging && (this.paging.totalPages > this.paging.currentPage || !!this.paging.nextPage)\n    );\n  }\n\n  get isLastPage() {\n    return this.paging && this.paging.totalPages === this.paging.currentPage;\n  }\n\n  constructor(\n    private element: ElementRef,\n    private cdRef: ChangeDetectorRef\n  ) {}\n\n  ngAfterContentInit(): void {\n    this.destroyed = false;\n    if (this.useIntersection && 'IntersectionObserver' in window) {\n      this.intersectionObserver = new IntersectionObserver(event => this.buttonInView(event[0]), {\n        root: this.container ? this.container.nativeElement : null\n      });\n      this.intersectionObserver.observe(this.element.nativeElement);\n    }\n    this.hasNoMoreData = this.shouldShowNoMoreDataHint();\n  }\n\n  ngOnDestroy(): void {\n    this.destroyed = true;\n    if (this.intersectionObserver) {\n      this.intersectionObserver.disconnect();\n      this.intersectionObserver.unobserve(this.element.nativeElement);\n      clearTimeout(this.loadUntilIntersected);\n    }\n  }\n\n  async loadMore(event?) {\n    if (!this.destroyed) {\n      this.isLoading = true;\n      this.cdRef.detectChanges();\n      if (event) {\n        event.stopPropagation();\n      }\n      if (this.hasMore) {\n        const result = await this.paging.next();\n        this.paging = result.paging;\n        this.onLoad.emit(result.data);\n        this.intersectionLoading();\n        this.hasNoMoreData = this.shouldShowNoMoreDataHint();\n      } else {\n        this.counter = 0;\n        this.isLoading = false;\n      }\n      this.cdRef.detectChanges();\n    }\n  }\n\n  private intersectionLoading() {\n    if (this.useIntersection && this.hasMore && this.loadUntilIntersected !== null) {\n      this.loadUntilIntersected = setTimeout(() => this.loadMore(), this.getLoadingThreshold());\n      this.useIntersection = this.shouldSwitchMode();\n    } else {\n      this.isLoading = false;\n      this.loadUntilIntersected = undefined;\n      this.cdRef.detectChanges();\n    }\n  }\n\n  private getLoadingThreshold(): number {\n    return this.LOAD_SAME_PAGE_THRESHOLD * this.counter++;\n  }\n\n  private shouldShowNoMoreDataHint() {\n    return (this.counter !== 0 || this.noMoreDataHint) && !this.hasMore;\n  }\n\n  private shouldSwitchMode() {\n    return this.counter < this.maxIterations || this.hidden;\n  }\n\n  private buttonInView(event) {\n    if (event.isIntersecting) {\n      this.loadMore();\n    } else if (this.loadUntilIntersected) {\n      clearTimeout(this.loadUntilIntersected);\n      this.loadUntilIntersected = null;\n      this.isLoading = false;\n      this.cdRef.detectChanges();\n    } else {\n      // avoiding a race condition when timeout is faster\n      // cleared then set\n      this.loadUntilIntersected = null;\n    }\n  }\n}\n","<button\n  class=\"btn btn-default btn-block text-center\"\n  type=\"button\"\n  title=\"{{ 'Load more' | translate }}\"\n  [ngClass]=\"{ 'btn-pending': isLoading }\"\n  [style.visibility]=\"hidden ? 'hidden' : 'visible'\"\n  [style.height]=\"hidden ? '1px' : null\"\n  (click)=\"loadMore($event)\"\n  *ngIf=\"hasMore && !(loadingTemplate && isLoading)\"\n>\n  <ng-container *ngIf=\"!isLoading\">\n    <span *ngIf=\"loadNextLabel; else loadPage\" [innerHTML]=\"loadNextLabel | translate\"></span>\n    <ng-template #loadPage>\n      <span translate ngNonBindable [translateParams]=\"{ pageNo: paging.currentPage + 1 }\">\n        Load page {{ pageNo }}\n      </span>\n    </ng-template>\n  </ng-container>\n  <ng-container *ngIf=\"isLoading\">\n    <span *ngIf=\"loadingLabel; else loading\" [innerHTML]=\"loadingLabel | translate\"></span>\n    <ng-template #loading>\n      <span translate ngNonBindable [translateParams]=\"{ pageNo: paging.currentPage + 1 }\">\n        Page {{ pageNo }} is loading…\n      </span>\n    </ng-template>\n  </ng-container>\n</button>\n\n<ng-container *ngIf=\"hasNoMoreData && !hideNoMoreDataHint && !isLoading\">\n  <ng-container *ngTemplateOutlet=\"noMoreDataHint || finishHint\"></ng-container>\n</ng-container>\n\n<ng-template #finishHint>\n  <div class=\"legend form-block center last-record\" title=\"{{ 'Last record' | translate }}\">\n    <i [c8yIcon]=\"'circle'\"></i>\n  </div>\n</ng-template>\n\n<ng-container *ngIf=\"loadingTemplate && isLoading\">\n  <ng-container *ngTemplateOutlet=\"loadingTemplate\"></ng-container>\n</ng-container>\n"]}