/
FieldTreeSelectInputDropdown.vue
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/
FieldTreeSelectInputDropdown.vue
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<!-- Copyright (C) 2012-2024 Zammad Foundation, https://zammad-foundation.org/ -->
<script setup lang="ts">
import type { Ref } from 'vue'
import { onUnmounted, computed, nextTick, ref, toRef } from 'vue'
import {
type UseElementBoundingReturn,
onClickOutside,
onKeyDown,
useVModel,
} from '@vueuse/core'
import { useFocusWhenTyping } from '#shared/composables/useFocusWhenTyping.ts'
import { useLocaleStore } from '#shared/stores/locale.ts'
import { useTrapTab } from '#shared/composables/useTrapTab.ts'
import { useTraverseOptions } from '#shared/composables/useTraverseOptions.ts'
import stopEvent from '#shared/utils/events.ts'
import testFlags from '#shared/utils/testFlags.ts'
import { i18n } from '#shared/i18n.ts'
import CommonLabel from '#shared/components/CommonLabel/CommonLabel.vue'
import { useCommonSelect } from '#desktop/components/CommonSelect/useCommonSelect.ts'
import type {
FlatSelectOption,
MatchedFlatSelectOption,
} from '#shared/components/Form/fields/FieldTreeSelect/types.ts'
import type { FieldTreeSelectInputDropdownInternalInstance } from './types.ts'
import FieldTreeSelectInputDropdownItem from './FieldTreeSelectInputDropdownItem.vue'
export interface Props {
// we cannot move types into separate file, because Vue would not be able to
// transform these into runtime types
modelValue?: string | number | boolean | (string | number | boolean)[] | null
options: FlatSelectOption[]
/**
* Do not modify local value
*/
passive?: boolean
multiple?: boolean
noClose?: boolean
noRefocus?: boolean
owner?: string
noOptionsLabelTranslation?: boolean
currentPath: FlatSelectOption[]
filter: string
flatOptions: FlatSelectOption[]
currentOptions: FlatSelectOption[]
optionValueLookup: { [index: string | number]: FlatSelectOption }
}
const props = defineProps<Props>()
const emit = defineEmits<{
(e: 'update:modelValue', option: string | number | (string | number)[]): void
(e: 'select', option: FlatSelectOption): void
(e: 'close'): void
(e: 'push', option: FlatSelectOption): void
(e: 'pop'): void
(e: 'clear-filter'): void
}>()
const locale = useLocaleStore()
const dropdownElement = ref<HTMLElement>()
const localValue = useVModel(props, 'modelValue', emit)
// TODO: do we really want this initial transforming of the value, when it's null?
if (localValue.value == null && props.multiple) {
localValue.value = []
}
const getFocusableOptions = () => {
return Array.from<HTMLElement>(
dropdownElement.value?.querySelectorAll('[tabindex="0"]') || [],
)
}
const showDropdown = ref(false)
let inputElementBounds: UseElementBoundingReturn
let windowHeight: Ref<number>
const hasDirectionUp = computed(() => {
if (!inputElementBounds || !windowHeight) return false
return inputElementBounds.y.value > windowHeight.value / 2
})
const dropdownStyle = computed(() => {
if (!inputElementBounds) return { top: 0, left: 0, width: 0, maxHeight: 0 }
const style: Record<string, string> = {
left: `${inputElementBounds.left.value}px`,
width: `${inputElementBounds.width.value}px`,
maxHeight: `calc(50vh - ${inputElementBounds.height.value}px)`,
}
if (hasDirectionUp.value) {
style.bottom = `${windowHeight.value - inputElementBounds.top.value}px`
} else {
style.top = `${
inputElementBounds.top.value + inputElementBounds.height.value
}px`
}
return style
})
const { activateTabTrap, deactivateTabTrap } = useTrapTab(dropdownElement)
let lastFocusableOutsideElement: HTMLElement | null = null
const getActiveElement = () => {
if (props.owner) {
return document.getElementById(props.owner)
}
return document.activeElement as HTMLElement
}
const { instances } = useCommonSelect()
const closeDropdown = () => {
deactivateTabTrap()
showDropdown.value = false
emit('close')
if (!props.noRefocus) {
nextTick(() => lastFocusableOutsideElement?.focus())
}
nextTick(() => {
testFlags.set('field-tree-select-input-dropdown.closed')
})
}
const openDropdown = (
bounds: UseElementBoundingReturn,
height: Ref<number>,
) => {
inputElementBounds = bounds
windowHeight = toRef(height)
instances.value.forEach((instance) => {
if (instance.isOpen) instance.closeDropdown()
})
showDropdown.value = true
lastFocusableOutsideElement = getActiveElement()
onClickOutside(dropdownElement, closeDropdown, {
ignore: [lastFocusableOutsideElement as unknown as HTMLElement],
})
requestAnimationFrame(() => {
nextTick(() => {
testFlags.set('field-tree-select-input-dropdown.opened')
})
})
}
const moveFocusToDropdown = (lastOption = false) => {
// Focus selected or first available option.
// https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Roles/listbox_role#keyboard_interactions
const focusableElements = getFocusableOptions()
if (!focusableElements?.length) return
let focusElement = focusableElements[0]
if (lastOption) {
focusElement = focusableElements[focusableElements.length - 1]
} else {
const selected = focusableElements.find(
(el) => el.getAttribute('aria-selected') === 'true',
)
if (selected) focusElement = selected
}
focusElement?.focus()
activateTabTrap()
}
const exposedInstance: FieldTreeSelectInputDropdownInternalInstance = {
isOpen: computed(() => showDropdown.value),
openDropdown,
closeDropdown,
getFocusableOptions,
moveFocusToDropdown,
}
instances.value.add(exposedInstance)
onUnmounted(() => {
instances.value.delete(exposedInstance)
})
defineExpose(exposedInstance)
// https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Roles/listbox_role#keyboard_interactions
useTraverseOptions(dropdownElement, { direction: 'vertical' })
// - Type-ahead is recommended for all listboxes, especially those with more than seven options
useFocusWhenTyping(dropdownElement)
onKeyDown(
'Escape',
(event) => {
stopEvent(event)
closeDropdown()
},
{ target: dropdownElement as Ref<EventTarget> },
)
const isCurrentValue = (value: string | number | boolean) => {
if (props.multiple && Array.isArray(localValue.value)) {
return localValue.value.includes(value)
}
return localValue.value === value
}
const select = (option: FlatSelectOption) => {
if (option.disabled) return
emit('select', option)
if (props.passive) {
if (!props.multiple) {
closeDropdown()
}
return
}
if (props.multiple && Array.isArray(localValue.value)) {
if (localValue.value.includes(option.value)) {
localValue.value = localValue.value.filter((v) => v !== option.value)
} else {
localValue.value.push(option.value)
}
return
}
if (props.modelValue === option.value) {
localValue.value = undefined
} else {
localValue.value = option.value
}
if (!props.multiple && !props.noClose) {
closeDropdown()
}
}
const hasMoreSelectableOptions = computed(() => {
if (props.currentPath.length)
return props.currentOptions.some(
(option) => !option.disabled && !isCurrentValue(option.value),
)
return (
props.options.filter(
(option) => !option.disabled && !isCurrentValue(option.value),
).length > 0
)
})
const focusFirstOption = () => {
const focusableElements = getFocusableOptions()
if (!focusableElements?.length) return
const focusElement = focusableElements[0]
focusElement?.focus()
}
const selectAll = (noFocus?: boolean) => {
// If currently viewing a parent, select visible only.
if (props.currentPath.length) {
props.currentOptions
.filter((option) => !option.disabled && !isCurrentValue(option.value))
.forEach((option) => select(option))
} else {
props.options
.filter((option) => !option.disabled && !isCurrentValue(option.value))
.forEach((option) => select(option))
}
if (noFocus) return
nextTick(() => {
focusFirstOption()
})
}
const previousPageCallback = (noFocus?: boolean) => {
emit('pop')
emit('clear-filter')
if (noFocus) return
nextTick(() => {
focusFirstOption()
})
}
const goToPreviousPage = (noFocus?: boolean) => {
previousPageCallback(noFocus)
}
const nextPageCallback = (option?: FlatSelectOption, noFocus?: boolean) => {
if (option?.hasChildren) {
emit('push', option)
if (noFocus) return
nextTick(() => {
focusFirstOption()
})
}
}
const goToNextPage = ({
option,
noFocus,
}: {
option: FlatSelectOption
noFocus?: boolean
}) => {
nextPageCallback(option, noFocus)
}
const maybeGoToNextOrPreviousPage = (
option: FlatSelectOption,
direction: 'left' | 'right',
) => {
if (
(locale.localeData?.dir === 'rtl' && direction === 'right') ||
(locale.localeData?.dir === 'ltr' && direction === 'left')
) {
goToPreviousPage()
return
}
goToNextPage({ option })
}
const getCurrentIndex = (option: FlatSelectOption) => {
return props.flatOptions.findIndex((o) => o.value === option.value)
}
const highlightedOptions = computed(() =>
props.options.map((option) => {
let parentPaths: string[] = []
if (option.parents) {
parentPaths = option.parents.map((parentValue) => {
const parentOption =
props.optionValueLookup[parentValue as string | number]
return `${parentOption.label || parentOption.value} \u203A `
})
}
let label = option.label || i18n.t('%s (unknown)', option.value.toString())
// Highlight the matched text within the option label by re-using passed regex match object.
// This approach has several benefits:
// - no repeated regex matching in order to identify matched text
// - support for matched text with accents, in case the search keyword didn't contain them (and vice-versa)
if (option.match && option.match[0]) {
const labelBeforeMatch = label.slice(0, option.match.index)
// Do not use the matched text here, instead use part of the original label in the same length.
// This is because the original match does not include accented characters.
const labelMatchedText = label.slice(
option.match.index,
option.match.index + option.match[0].length,
)
const labelAfterMatch = label.slice(
option.match.index + option.match[0].length,
)
const highlightClasses = option.disabled
? 'bg-blue-200 dark:bg-gray-300'
: 'bg-blue-600 dark:bg-blue-900 group-hover:bg-blue-800 group-hover:group-focus:bg-blue-600 group-hover:text-white group-focus:text-black group-hover:group-focus:text-black'
label = `${labelBeforeMatch}<span class="${highlightClasses}">${labelMatchedText}</span>${labelAfterMatch}`
}
return {
...option,
matchedPath: parentPaths.join('') + label,
} as MatchedFlatSelectOption
}),
)
const duration = VITE_TEST_MODE ? undefined : { enter: 300, leave: 200 }
</script>
<template>
<slot
:state="showDropdown"
:open="openDropdown"
:close="closeDropdown"
:focus="moveFocusToDropdown"
/>
<Teleport to="body">
<Transition :duration="duration">
<div
v-if="showDropdown"
id="field-tree-select-input-dropdown"
ref="dropdownElement"
class="fixed z-10 flex antialiased"
:style="dropdownStyle"
>
<div
class="select-dialog w-full"
role="menu"
:class="{
'select-dialog--up': hasDirectionUp,
'select-dialog--down': !hasDirectionUp,
}"
>
<div
class="h-full flex flex-col items-start bg-white dark:bg-gray-500 border-x border-neutral-100 dark:border-gray-900"
:class="{
'rounded-t-lg border-t': hasDirectionUp,
'rounded-b-lg border-b': !hasDirectionUp,
}"
>
<div
v-if="
currentPath.length || (multiple && hasMoreSelectableOptions)
"
class="w-full px-2.5 py-1.5 flex justify-between gap-2"
>
<CommonLabel
v-if="currentPath.length"
class="!text-blue-800 focus-visible:outline focus-visible:rounded-sm focus-visible:outline-1 focus-visible:outline-offset-1 focus-visible:outline-blue-800"
:prefix-icon="
locale.localeData?.dir === 'rtl'
? 'chevron-right'
: 'chevron-left'
"
:aria-label="$t('Back to previous page')"
role="button"
tabindex="1"
@click.stop="goToPreviousPage(true)"
@keypress.enter.prevent.stop="goToPreviousPage()"
@keypress.space.prevent.stop="goToPreviousPage()"
>
{{ $t('Back') }}
</CommonLabel>
<CommonLabel
v-if="multiple && hasMoreSelectableOptions"
class="ms-auto !text-blue-800 focus-visible:outline focus-visible:rounded-sm focus-visible:outline-1 focus-visible:outline-offset-1 focus-visible:outline-blue-800"
prefix-icon="check-all"
role="button"
tabindex="2"
@click.stop="selectAll(true)"
@keypress.enter.prevent.stop="selectAll()"
@keypress.space.prevent.stop="selectAll()"
>
{{
currentPath.length
? $t('select visible options')
: $t('select all options')
}}
</CommonLabel>
</div>
<div
:aria-label="$t('Select…')"
role="listbox"
:aria-multiselectable="multiple"
tabindex="-1"
class="w-full overflow-y-auto"
>
<FieldTreeSelectInputDropdownItem
v-for="option in filter ? highlightedOptions : currentOptions"
:key="String(option.value)"
:class="{
'first:rounded-t-[7px]':
hasDirectionUp &&
!currentPath.length &&
(!multiple || !hasMoreSelectableOptions),
'last:rounded-b-[7px]': !hasDirectionUp,
}"
:aria-setsize="flatOptions.length"
:aria-posinset="getCurrentIndex(option) + 1"
:selected="isCurrentValue(option.value)"
:multiple="multiple"
:filter="filter"
:option="option"
:no-label-translate="noOptionsLabelTranslation"
@select="select($event)"
@next="goToNextPage($event)"
@keydown.right.prevent="
maybeGoToNextOrPreviousPage(option, 'right')
"
@keydown.left.prevent="
maybeGoToNextOrPreviousPage(option, 'left')
"
/>
<FieldTreeSelectInputDropdownItem
v-if="!options.length"
:option="
{
label: __('No results found'),
value: '',
disabled: true,
} as MatchedFlatSelectOption
"
/>
<slot name="footer" />
</div>
</div>
</div>
</div>
</Transition>
</Teleport>
</template>
<style scoped>
.select-dialog {
&--down {
@apply origin-top;
}
&--up {
@apply origin-bottom;
}
}
.v-enter-active {
.select-dialog {
@apply duration-200 ease-out;
}
}
.v-leave-active {
.select-dialog {
@apply duration-200 ease-in;
}
}
.v-enter-to,
.v-leave-from {
.select-dialog {
@apply scale-y-100 opacity-100;
}
}
.v-enter-from,
.v-leave-to {
.select-dialog {
@apply scale-y-50 opacity-0;
}
}
</style>