(search) add keyboard navigation to the search dialogue

components/search/SearchDialogue.vue

@@ -14,6 +14,7 @@ const queryValidation = computed(() => {
 });
 
 const searchAsyncData = useAsyncData('search', async () => {
+    selected.value = null;
     if (queryValidation.value !== undefined) {
         return [];
     }
@@ -41,6 +42,7 @@ const open = () => {
     query.value = '';
     searchAsyncData.clear();
     dialogue.value?.showModal();
+    selected.value = null;
 };
 
 const close = () => {
@@ -65,6 +67,34 @@ const onMousedown = (event: MouseEvent) => {
     }
 };
 
+const selected = ref<number | null>(null);
+const router = useRouter();
+onKeyStroke('ArrowDown', () => {
+    selected.value = Math.min(
+        (selected.value ?? -1) + 1,
+        (searchAsyncData.data?.value?.length ?? 0) - 1,
+    );
+});
+onKeyStroke('ArrowUp', () => {
+    selected.value = Math.max(
+        (selected.value ?? -1) - 1,
+        0,
+    );
+});
+onKeyStroke('Enter', () => {
+    if (selected.value === null) {
+        return;
+    }
+
+    const document = searchAsyncData.data.value?.[selected.value];
+    if (!document) {
+        return;
+    }
+
+    router.push(document.url);
+    close();
+});
+
 defineExpose({ open, close });
 </script>
 
@@ -93,9 +123,9 @@ defineExpose({ open, close });
             class="list-group"
         >
             <li
-                v-for="document of searchAsyncData.data.value"
+                v-for="(document, index) of searchAsyncData.data.value"
                 :key="`${document.kind}-${document.id}`"
-                class="list-group-item list-group-item-action p-0"
+                :class="['list-group-item list-group-item-action p-0', selected === index ? 'list-group-item-hover' : '']"
             >
                 <SearchItem :document="document" @click="close()" />
             </li>
@@ -105,3 +135,12 @@ defineExpose({ open, close });
         </div>
     </dialog>
 </template>
+
+<style lang="scss">
+@import "assets/variables";
+
+.list-group-item-hover {
+    background-color: $list-group-hover-bg !important;
+    border-left: 3px solid $primary !important;
+}
+</style>