118223: Stop space from scrolling down page

src/app/item-page/edit-item-page/item-bitstreams/item-bitstreams.component.ts

@@ -138,6 +138,7 @@ export class ItemBitstreamsComponent extends AbstractItemUpdateComponent impleme
     // Otherwise we might clear the selection when a different action was intended, e.g. clicking a button or selecting
     // a different bitstream.
     if (event.target instanceof Element && event.target.tagName === 'BODY') {
+      event.preventDefault();
       this.itemBitstreamsService.clearSelection();
     }
   }

src/app/item-page/edit-item-page/item-bitstreams/item-edit-bitstream-bundle/item-edit-bitstream-bundle.component.html

@@ -82,7 +82,7 @@
             <th class="bitstream-name row-element {{ columnSizes.columns[0].buildClasses() }}"
                 scope="row" id="{{ entry.nameStripped }}" headers="{{ bundleName }} name">
               <div class="drag-handle text-muted float-left p-1 mr-2" tabindex="0" cdkDragHandle
-                   (keyup.enter)="select(entry)" (keyup.space)="select(entry)" (click)="select(entry)">
+                   (keydown.enter)="select($event, entry)" (keydown.space)="select($event, entry)" (click)="select($event, entry)">
                 <i class="fas fa-grip-vertical fa-fw"
                    [title]="'item.edit.bitstreams.edit.buttons.drag' | translate"></i>
               </div>

src/app/item-page/edit-item-page/item-bitstreams/item-edit-bitstream-bundle/item-edit-bitstream-bundle.component.ts

@@ -423,9 +423,17 @@ export class ItemEditBitstreamBundleComponent implements OnInit, OnDestroy {
    * Handles a select action for the provided bitstream entry.
    * If the selected bitstream is currently selected, the selection is cleared.
    * If no, or a different bitstream, is selected, the provided bitstream becomes the selected bitstream.
-   * @param bitstream
+   * @param event The event that triggered the select action
+   * @param bitstream The bitstream that is the target of the select action
    */
-  select(bitstream: BitstreamTableEntry) {
+  select(event: UIEvent, bitstream: BitstreamTableEntry) {
+    event.preventDefault();
+
+    if (event instanceof KeyboardEvent && event.repeat) {
+      // Don't handle hold events, otherwise it would change rapidly between being selected and unselected
+      return;
+    }
+
     const selectedBitstream = this.itemBitstreamsService.getSelectedBitstream();
 
     if (hasValue(selectedBitstream) && selectedBitstream.bitstream === bitstream) {