mirror of
https://github.com/DSpace/dspace-angular.git
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c0f43bc585
In most cases we can deal with the untyped errors by introducing an explicit instanceof check DspaceRestService includes an unsafe catch/rethrow → made it explicitly typed as `any`, but it should be revisited at some point
98 lines
2.4 KiB
TypeScript
98 lines
2.4 KiB
TypeScript
import { DOCUMENT } from '@angular/common';
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import {
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Inject,
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Injectable,
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RendererFactory2,
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ViewEncapsulation,
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} from '@angular/core';
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/**
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* LinkHead Service injects <link> tag into the head element during runtime.
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*/
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@Injectable()
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export class LinkHeadService {
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constructor(
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private rendererFactory: RendererFactory2,
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@Inject(DOCUMENT) private document,
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) {
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}
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/**
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* Method to create a Link tag in the HEAD of the html.
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* @param tag LinkDefition is the paramaters to define a link tag.
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* @returns Link tag that was created
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*/
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addTag(tag: LinkDefinition) {
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try {
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const renderer = this.rendererFactory.createRenderer(this.document, {
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id: '-1',
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encapsulation: ViewEncapsulation.None,
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styles: [],
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data: {},
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});
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const link = renderer.createElement('link');
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const head = this.document.head;
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if (head === null) {
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throw new Error('<head> not found within DOCUMENT.');
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}
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Object.keys(tag).forEach((prop: string) => {
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return renderer.setAttribute(link, prop, tag[prop]);
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});
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renderer.appendChild(head, link);
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return renderer;
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} catch (e) {
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console.error('Error within linkService: ', e);
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}
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}
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/**
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* Removes a link tag in header based on the given attrSelector.
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* @param attrSelector The attr assigned to a link tag which will be used to determine what link to remove.
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*/
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removeTag(attrSelector: string) {
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if (attrSelector) {
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try {
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const renderer = this.rendererFactory.createRenderer(this.document, {
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id: '-1',
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encapsulation: ViewEncapsulation.None,
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styles: [],
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data: {},
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});
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const head = this.document.head;
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if (head === null) {
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throw new Error('<head> not found within DOCUMENT.');
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}
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const linkTags = this.document.querySelectorAll('link[' + attrSelector + ']');
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for (const link of linkTags) {
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renderer.removeChild(head, link);
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}
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} catch (e) {
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if (e instanceof Error) {
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console.error('Error while removing tag: ' + e.message);
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}
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}
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}
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}
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}
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export declare type LinkDefinition = {
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charset?: string;
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crossorigin?: string;
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href?: string;
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hreflang?: string;
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media?: string;
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rel?: string;
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rev?: string;
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sizes?: string;
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target?: string;
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type?: string;
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} & {
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[prop: string]: string;
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};
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