@c8y/ngx-components
Version:
Angular modules for Cumulocity IoT applications
121 lines • 16.1 kB
JavaScript
import { TranslateDirective, TranslateService } from '@ngx-translate/core';
import { ChangeDetectorRef, Directive, ElementRef, EventEmitter } from '@angular/core';
import { Subject } from 'rxjs';
import { takeUntil } from 'rxjs/operators';
import * as i0 from "@angular/core";
import * as i1 from "@ngx-translate/core";
export class C8yTranslateDirective extends TranslateDirective {
/**
* Used to get private element property from TranslateDirective, so it doesn't throw tsErrors
*/
get _elementRef() {
return this.element;
}
/**
* Used to get private translateService property from TranslateDirective, so it doesn't throw tsErrors
*/
get _translateService() {
return this.translateService;
}
constructor(translateService, element, _ref) {
super(translateService, element, _ref);
/**
* Used to trigger events when html is replaced by directive.
*/
this.htmlUpdateEvent = new EventEmitter();
this.destroy$ = new Subject();
this.elementTranslated = false;
translateService.onLangChange.pipe(takeUntil(this.destroy$)).subscribe(() => {
if (!this.htmlMode) {
element.nativeElement.innerHTML = this.initialValue;
this.setTranslatedStatus(false);
_ref.detectChanges();
}
});
}
/**
* Overridden method from original directive.
* For simple text nodes, it just invokes the base method.
* For complex nodes, it builds translation key from whole inner HTML
* and replaces it with its translation.
* This prevents splitting HTML into pieces and attempting to translate each one separately
* which doesn't work, because we extract strings in whole.
*/
checkNodes(forceUpdate = false, translations) {
if (!this.htmlMode && (this.isElementSimpleTextType() || this.isElementInnerHtmlEmpty())) {
/**
* If element does not contain complex html, then fallBack to default logic.
*/
if (!this.elementTranslated) {
super.checkNodes(forceUpdate, translations);
this.setTranslatedStatus(true);
}
}
else {
this.htmlMode = true;
if (this.isLookupKeyMissing()) {
this._elementRef.nativeElement.lookupKey = this.getLookupKey();
}
if (this.lookupKeyExist()) {
const newTranslation = this.getNewTranslation();
if (!this.lastTranslation || this.lastTranslation !== newTranslation) {
this.lastTranslation = newTranslation;
this.updateHtmlContent();
this.htmlUpdateEvent.emit();
}
}
}
}
ngOnChanges(changes) {
if (changes && changes.translateParams) {
this.setTranslatedStatus(false);
}
}
ngOnDestroy() {
this.htmlUpdateEvent.complete();
this.destroy$.next();
this.destroy$.complete();
super.ngOnDestroy();
}
ngAfterViewInit() {
this.initialValue = this._elementRef.nativeElement.innerHTML;
}
setTranslatedStatus(status) {
this.elementTranslated = status;
}
/**
* Builds lookup key from innerHTML, removes comments (that might be added by Angular) and trims it.
*/
getLookupKey() {
return this._elementRef.nativeElement.innerHTML.replace(/<!--.*?-->/gs, '').trim();
}
isElementSimpleTextType() {
return (this._elementRef.nativeElement.childNodes.length === 1 &&
this._elementRef.nativeElement.childNodes[0].nodeType === 3);
}
isElementInnerHtmlEmpty() {
return !this._elementRef.nativeElement.innerHTML;
}
isLookupKeyMissing() {
return !this._elementRef.nativeElement.lookupKey;
}
lookupKeyExist() {
return this._elementRef.nativeElement.lookupKey;
}
getNewTranslation() {
return this._translateService.instant(this._elementRef.nativeElement.lookupKey, this.currentParams || {});
}
updateHtmlContent() {
this._elementRef.nativeElement.innerHTML = this.lastTranslation;
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.2.13", ngImport: i0, type: C8yTranslateDirective, deps: [{ token: i1.TranslateService }, { token: i0.ElementRef }, { token: i0.ChangeDetectorRef }], target: i0.ɵɵFactoryTarget.Directive }); }
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "18.2.13", type: C8yTranslateDirective, isStandalone: true, selector: "[translate],[ngx-translate]", usesInheritance: true, usesOnChanges: true, ngImport: i0 }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.2.13", ngImport: i0, type: C8yTranslateDirective, decorators: [{
type: Directive,
args: [{
selector: '[translate],[ngx-translate]',
standalone: true
}]
}], ctorParameters: () => [{ type: i1.TranslateService }, { type: i0.ElementRef }, { type: i0.ChangeDetectorRef }] });
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{ TranslateDirective, TranslateService } from '@ngx-translate/core';\nimport {\n  AfterViewInit,\n  ChangeDetectorRef,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  OnChanges,\n  OnDestroy,\n  SimpleChanges\n} from '@angular/core';\nimport { Subject } from 'rxjs';\nimport { takeUntil } from 'rxjs/operators';\n\n@Directive({\n  selector: '[translate],[ngx-translate]',\n  standalone: true\n})\nexport class C8yTranslateDirective\n  extends TranslateDirective\n  implements AfterViewInit, OnDestroy, OnChanges\n{\n  /**\n   * Used to get private element property from TranslateDirective, so it doesn't throw tsErrors\n   */\n  private get _elementRef(): ElementRef {\n    return (this as any).element;\n  }\n\n  /**\n   * Used to get private translateService property from TranslateDirective, so it doesn't throw tsErrors\n   */\n  private get _translateService(): TranslateService {\n    return (this as any).translateService;\n  }\n\n  /**\n   * Used to trigger events when html is replaced by directive.\n   */\n  htmlUpdateEvent: EventEmitter<void> = new EventEmitter<void>();\n\n  /**\n   * When this directive successfully translates node, it stores its value in this property.\n   * Another translation will be performed only if new translation value differs from stored one.\n   */\n  lastTranslation: string;\n\n  /**\n   * When this directive encounters element that is HTML, it should switch to Html mode even if\n   * new translated element does not contain any HTML.\n   */\n  htmlMode: boolean;\n\n  initialValue: string;\n  destroy$ = new Subject<void>();\n  elementTranslated = false;\n\n  constructor(translateService: TranslateService, element: ElementRef, _ref: ChangeDetectorRef) {\n    super(translateService, element, _ref);\n\n    translateService.onLangChange.pipe(takeUntil(this.destroy$)).subscribe(() => {\n      if (!this.htmlMode) {\n        element.nativeElement.innerHTML = this.initialValue;\n        this.setTranslatedStatus(false);\n        _ref.detectChanges();\n      }\n    });\n  }\n\n  /**\n   * Overridden method from original directive.\n   * For simple text nodes, it just invokes the base method.\n   * For complex nodes, it builds translation key from whole inner HTML\n   * and replaces it with its translation.\n   * This prevents splitting HTML into pieces and attempting to translate each one separately\n   * which doesn't work, because we extract strings in whole.\n   */\n  checkNodes(forceUpdate = false, translations?: any) {\n    if (!this.htmlMode && (this.isElementSimpleTextType() || this.isElementInnerHtmlEmpty())) {\n      /**\n       * If element does not contain complex html, then fallBack to default logic.\n       */\n      if (!this.elementTranslated) {\n        super.checkNodes(forceUpdate, translations);\n        this.setTranslatedStatus(true);\n      }\n    } else {\n      this.htmlMode = true;\n      if (this.isLookupKeyMissing()) {\n        this._elementRef.nativeElement.lookupKey = this.getLookupKey();\n      }\n      if (this.lookupKeyExist()) {\n        const newTranslation = this.getNewTranslation();\n        if (!this.lastTranslation || this.lastTranslation !== newTranslation) {\n          this.lastTranslation = newTranslation;\n          this.updateHtmlContent();\n          this.htmlUpdateEvent.emit();\n        }\n      }\n    }\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    if (changes && changes.translateParams) {\n      this.setTranslatedStatus(false);\n    }\n  }\n\n  ngOnDestroy() {\n    this.htmlUpdateEvent.complete();\n    this.destroy$.next();\n    this.destroy$.complete();\n    super.ngOnDestroy();\n  }\n\n  ngAfterViewInit() {\n    this.initialValue = this._elementRef.nativeElement.innerHTML;\n  }\n\n  setTranslatedStatus(status: boolean) {\n    this.elementTranslated = status;\n  }\n\n  /**\n   * Builds lookup key from innerHTML, removes comments (that might be added by Angular) and trims it.\n   */\n  private getLookupKey() {\n    return this._elementRef.nativeElement.innerHTML.replace(/<!--.*?-->/gs, '').trim();\n  }\n\n  private isElementSimpleTextType(): boolean {\n    return (\n      this._elementRef.nativeElement.childNodes.length === 1 &&\n      this._elementRef.nativeElement.childNodes[0].nodeType === 3\n    );\n  }\n\n  private isElementInnerHtmlEmpty(): boolean {\n    return !this._elementRef.nativeElement.innerHTML;\n  }\n\n  private isLookupKeyMissing(): boolean {\n    return !this._elementRef.nativeElement.lookupKey;\n  }\n\n  private lookupKeyExist(): boolean {\n    return this._elementRef.nativeElement.lookupKey;\n  }\n\n  private getNewTranslation(): string {\n    return this._translateService.instant(\n      this._elementRef.nativeElement.lookupKey,\n      this.currentParams || {}\n    );\n  }\n\n  private updateHtmlContent(): void {\n    this._elementRef.nativeElement.innerHTML = this.lastTranslation;\n  }\n}\n"]}