Client - handle keyboard navigation on timezone selection in preferences

fittrackee_client/src/components/User/ProfileEdition/TimezoneDropdown.vue

@@ -7,19 +7,35 @@
       :value="timezone"
       :disabled="disabled"
       required
-      @keydown.esc="onUpdateTimezone(input)"
+      role="combobox"
+      aria-autocomplete="list"
+      aria-controls="tz-dropdown-list"
+      :aria-expanded="isOpen"
+      @keydown.esc="cancelUpdate()"
       @keydown.enter="onEnter"
       @input="openDropdown"
+      @blur="closeDropdown()"
+      @keydown.down="onKeyDown()"
+      @keydown.up="onKeyUp()"
     />
-    <ul class="tz-dropdown-list" v-if="isOpen" ref="tzList">
+    <ul
+      class="tz-dropdown-list"
+      id="tz-dropdown-list"
+      v-if="isOpen"
+      role="listbox"
+      tabindex="-1"
+      :aria-label="$t('user.PROFILE.TIMEZONE', 0)"
+    >
       <li
-        v-for="(tz, index) in timeZones.filter((t) => matchTimezone(t))"
+        v-for="(tz, index) in filteredTimezones"
         :key="tz"
+        :id="`tz-dropdown-item-${index}`"
         class="tz-dropdown-item"
         :class="{ focus: index === focusItemIndex }"
-        @click="onUpdateTimezone(tz)"
+        @click="onUpdateTimezone(index)"
         @mouseover="onMouseOver(index)"
         :autofocus="index === focusItemIndex"
+        role="option"
       >
         {{ tz }}
       </li>
@@ -28,8 +44,8 @@
 </template>
 
 <script setup lang="ts">
-  import { ref, toRefs, watch } from 'vue'
-  import type { Ref } from 'vue'
+  import { computed, ref, toRefs, watch } from 'vue'
+  import type { ComputedRef, Ref } from 'vue'
 
   import { timeZones } from '@/utils/timezone'
 
@@ -46,8 +62,10 @@
   const { input, disabled } = toRefs(props)
   const timezone: Ref<string> = ref(input.value)
   const isOpen: Ref<boolean> = ref(false)
-  const tzList: Ref<HTMLInputElement | null> = ref(null)
   const focusItemIndex: Ref<number> = ref(0)
+  const filteredTimezones: ComputedRef<string[]> = computed(() =>
+    input.value ? timeZones.filter((t) => matchTimezone(t)) : timeZones
+  )
 
   function matchTimezone(t: string): RegExpMatchArray | null {
     return t.toLowerCase().match(timezone.value.toLowerCase())
@@ -55,15 +73,17 @@
   function onMouseOver(index: number) {
     focusItemIndex.value = index
   }
-  function onUpdateTimezone(value: string) {
-    timezone.value = value
-    isOpen.value = false
-    emit('updateTimezone', value)
+  function onUpdateTimezone(index: number) {
+    if (filteredTimezones.value.length > index) {
+      timezone.value = filteredTimezones.value[index]
+      emit('updateTimezone', timezone.value)
+      isOpen.value = false
+    }
   }
   function onEnter(event: Event) {
     event.preventDefault()
-    if (tzList.value?.firstElementChild?.innerHTML) {
-      onUpdateTimezone(tzList.value?.firstElementChild?.innerHTML)
+    if (filteredTimezones.value.length > 0) {
+      onUpdateTimezone(focusItemIndex.value)
     }
   }
   function openDropdown(event: Event) {
@@ -71,6 +91,42 @@
     isOpen.value = true
     timezone.value = (event.target as HTMLInputElement).value.trim()
   }
+  function closeDropdown() {
+    onUpdateTimezone(focusItemIndex.value)
+  }
+  function scrollIntoOption(index: number) {
+    const option = document.getElementById(`tz-dropdown-item-${index}`)
+    if (option) {
+      option.focus()
+      option.scrollIntoView({ behavior: 'smooth', block: 'nearest' })
+    }
+  }
+  function onKeyDown() {
+    isOpen.value = true
+    focusItemIndex.value =
+      focusItemIndex.value === null ? 0 : (focusItemIndex.value += 1)
+    if (focusItemIndex.value >= filteredTimezones.value.length) {
+      focusItemIndex.value = 0
+    }
+    scrollIntoOption(focusItemIndex.value)
+  }
+  function onKeyUp() {
+    isOpen.value = true
+    focusItemIndex.value =
+      focusItemIndex.value === null
+        ? filteredTimezones.value.length - 1
+        : (focusItemIndex.value -= 1)
+    if (focusItemIndex.value <= -1) {
+      focusItemIndex.value = filteredTimezones.value.length - 1
+    }
+    scrollIntoOption(focusItemIndex.value)
+  }
+  function cancelUpdate() {
+    if (isOpen.value) {
+      isOpen.value = false
+      timezone.value = input.value
+    }
+  }
 
   watch(
     () => props.input,

fittrackee_client/src/locales/en/user.json

@@ -123,7 +123,7 @@
         "LIGHT": "Light"
       }
     },
-    "TIMEZONE": "Timezone",
+    "TIMEZONE": "Timezone | Timezones",
     "UNITS": {
       "IMPERIAL": "Imperial system (ft, mi, mph, °F)",
       "LABEL": "Units for distance",

fittrackee_client/src/locales/fr/user.json

@@ -123,7 +123,7 @@
         "LIGHT": "Clair"
       }
     },
-    "TIMEZONE": "Fuseau horaire",
+    "TIMEZONE": "Fuseau horaire | Fuseaux horaires",
     "UNITS": {
       "IMPERIAL": "Système impérial (ft, mi, mph, °F)",
       "LABEL": "Unités pour les distances",