Allow opening ds-metadata-uri-values links in a new window

src/app/item-page/field-components/metadata-uri-values/metadata-uri-values.component.html

@@ -1,5 +1,5 @@
 <ds-metadata-field-wrapper [label]="label | translate">
-    <a class="dont-break-out" *ngFor="let mdValue of mdValues; let last=last;" [href]="mdValue.value">
+    <a class="dont-break-out" *ngFor="let mdValue of mdValues; let last=last;" [href]="mdValue.value" [target]="linkTarget">
        {{ linktext || mdValue.value }}<span *ngIf="!last" [innerHTML]="separator"></span>
     </a>
 </ds-metadata-field-wrapper>

src/app/item-page/field-components/metadata-uri-values/metadata-uri-values.component.spec.ts

@@ -73,6 +73,13 @@ describe('MetadataUriValuesComponent', () => {
     expect(separators.length).toBe(mockMetadata.length - 1);
   });
 
+  it('should contain the correct target attribute for metadata links', () => {
+    const links = fixture.debugElement.queryAll(By.css('a'));
+    for (const link of links) {
+      expect(link.nativeElement.getAttribute('target')).toBe('_blank');
+    }
+  });
+
   describe('when linktext is defined', () => {
 
     beforeEach(() => {

src/app/item-page/field-components/metadata-uri-values/metadata-uri-values.component.ts

@@ -37,4 +37,10 @@ export class MetadataUriValuesComponent extends MetadataValuesComponent {
    * The label for this iteration of metadata values
    */
   @Input() label: string;
+
+  /**
+   * The target attribute for the metadata links.
+   * Defaults to '_blank' to open links in a new window/tab.
+   */
+  @Input() linkTarget = '_blank';
 }