malio-layer-ui/app/components/malio/select/Select.vue

<template>
  <div
    ref="root"
    :class="mergedGroupClass"
  >
    <button
      :id="buttonId"
      type="button"
      class="grow-height peer relative w-full border bg-white pl-3 pr-10 py-1 text-left outline-none focus-visible:border-2 focus-visible:border-m-primary"
      :class="[
          hasError
            ? isOpen
              ? openDirection === 'down'
                ? 'rounded-b-none !border-2 !border-m-danger !border-b-0'
                : 'rounded-t-none !border-2 !border-m-danger !border-t-0'
              : 'border-m-danger'
            : hasSuccess
              ? isOpen
                ? openDirection === 'down'
                  ? 'rounded-b-none !border-2 !border-m-success !border-b-0'
                  : 'rounded-t-none !border-2 !border-m-success !border-t-0'
                : 'border-m-success'
              : isOpen
                ? openDirection === 'down'
                  ? 'rounded-b-none !border-2 !border-m-primary !border-b-0'
                  : 'rounded-t-none !border-2 !border-m-primary !border-t-0'
                : isOptionSelected
                  ? 'border-black'
                  : 'border-m-muted',
          disabled ? 'cursor-not-allowed border-m-muted text-black/60' : 'cursor-pointer',
          label ? 'min-h-[40px]' : 'h-[40px] py-0',
          rounded,
          textField,
  ]"
      :aria-expanded="isOpen"
      :aria-controls="listboxId"
      :aria-invalid="hasError"
      :aria-describedby="describedBy"
      :disabled="disabled"
      @click="toggle"
    >
      <label
        v-if="label"
        class="floating-label pointer-events-none absolute left-3 inline-block origin-left transition-transform duration-150 font-medium"
        :class="[
          isOpen ? 'top-2  z-30' : 'top-2',
          hasError
            ? 'text-m-danger'
            : hasSuccess
              ? 'text-m-success'
              : isOpen
                ? 'text-m-primary'
                : isOptionSelected
                  ? 'text-black'
                  : 'text-m-muted',
          textLabel,
        ]"
        :style="labelTransformStyle"
      >
        {{ label }}
      </label>

      <span
        class="block truncate"
        :class="[
          textValue,
          isOptionSelected ? 'text-black' : 'select-none text-transparent'
        ]"
      >
        {{ selectedLabel || '\u00A0' }}
      </span>

      <span
        class="absolute right-3 top-1/2 -translate-y-1/2"
        :class="[
          hasError
            ? 'text-m-danger'
            : hasSuccess
              ? 'text-m-success'
              : 'text-current'
        ]"
      >
      <slot name="icon">
        <IconifyIcon
          icon="mdi:chevron-down"
          width="20"
          class="transition-transform duration-300"
          :class="isOpen ? 'rotate-180' : 'rotate-0'"
        />
      </slot>
    </span>
    </button>

    <ul
      v-if="isOpen"
      :id="listboxId"
      ref="listRef"
      role="listbox"
      :aria-labelledby="buttonId"
      class="absolute left-0 right-0 z-20 max-h-60 w-full overflow-auto border-2 bg-white"
      :class="[
        openDirection === 'down'
          ? 'top-[calc(100%-2px)] rounded-b-md border-t-0'
          : 'bottom-[calc(100%-2px)] rounded-t-md border-b-0',
        hasError
          ? 'select-scrollbar-error'
          : hasSuccess
            ? 'select-scrollbar-success'
            : 'select-scrollbar-primary',
        hasError
          ? 'border-m-danger'
          : hasSuccess
            ? 'border-m-success'
            : 'border-m-primary'
      ]"
    >
      <li
        v-for="(opt, index) in normalizedOptions"
        :id="optionId(index)"
        :key="String(opt.value)"
        role="option"
        :aria-selected="opt.value === modelValue"
        class="cursor-pointer px-3 py-2"
        :class="[
            index === activeIndex ? 'bg-m-muted/10' : '',
            opt.value === modelValue ? 'bg-m-muted/10 font-semibold' : '',
            opt.value === null ? 'text-black/40' : 'text-black'
          ]"
        @mouseenter="activeIndex = index"
        @mousedown.prevent
        @click="select(opt.value)"
      >
        {{ opt.label || '\u00A0' }}
      </li>
    </ul>
  </div>
  <p
    v-if="hint || hasError || hasSuccess"
    :id="`${buttonId}-describedby`"
    :class="[
      hasError
        ? 'text-m-danger'
        : hasSuccess
          ? 'text-m-success'
          : 'text-m-muted',
      'mt-1 ml-[2px] text-xs',
    ]"
  >
    {{ error || success || hint }}
  </p>
</template>

<script setup lang="ts">
import {computed, onBeforeUnmount, onMounted, ref, useId, nextTick} from 'vue'
import {Icon as IconifyIcon} from '@iconify/vue'
import {twMerge} from 'tailwind-merge'

defineOptions({name: 'MalioSelect', inheritAttrs: false})

type Option = {
  label: string;
  value: string | number | null
}
const props = withDefaults(defineProps<{
  modelValue: string | number | null
  options?: Option[]
  emptyOptionLabel?: string
  label?: string
  hint?: string
  error?: string
  success?: string
  minWidth?: string
  maxWidth?: string
  textField?: string
  textValue?: string
  textLabel?: string
  rounded?: string
  disabled?: boolean
  groupClass?: string
}>(), {
  options: () => [],
  emptyOptionLabel: '',
  label: '',
  hint: '',
  error: '',
  success: '',
  minWidth: 'w-96',
  maxWidth: '',
  textField: 'text-lg',
  textValue: 'text-lg',
  textLabel: 'text-sm',
  rounded: 'rounded-md',
  disabled: false,
  groupClass: '',
})

const emit = defineEmits<{
  (e: 'update:modelValue', v: string | number | null): void
}>()
const root = ref<HTMLElement | null>(null)
const isOpen = ref(false)
const activeIndex = ref(-1)
const openDirection = ref<'down' | 'up'>('down')
const uid = useId()
const buttonId = `custom-select-btn-${uid}`
const listboxId = `custom-select-listbox-${uid}`
const listRef = ref<HTMLElement | null>(null)
const listHeight = ref(0)
const normalizedOptions = computed<Option[]>(() => [
  {label: props.emptyOptionLabel, value: null},
  ...props.options,
])
const mergedGroupClass = computed(() =>
  twMerge('relative mt-4 w-full', props.minWidth, props.maxWidth, props.groupClass),
)
const hasError = computed(() => !!props.error)
const hasSuccess = computed(() => !!props.success && !hasError.value)
const isOptionSelected = computed(() =>
  props.options.some(o => o.value === props.modelValue)
)
const shouldFloatLabel = computed(() =>
  isOpen.value || isOptionSelected.value
)
const selectedLabel = computed(() =>
  props.options.find(o => o.value === props.modelValue)?.label ?? ''
)
const describedBy = computed(() =>
  (hasError.value || hasSuccess.value || !!props.hint) ? `${buttonId}-describedby` : undefined,
)

function optionId(index: number) {
  return `custom-select-opt-${uid}-${index}`
}

function updateOpenDirection() {
  if (!root.value) return

  const rect = root.value.getBoundingClientRect()
  const estimatedListHeight = Math.min(normalizedOptions.value.length * 40, 240)
  const spaceBelow = window.innerHeight - rect.bottom
  const spaceAbove = rect.top

  openDirection.value =
    spaceBelow >= estimatedListHeight || spaceBelow >= spaceAbove
      ? 'down'
      : 'up'
}

function open() {
  updateOpenDirection()
  isOpen.value = true

  const selectedIndex = normalizedOptions.value.findIndex(o => o.value === props.modelValue)
  activeIndex.value = selectedIndex >= 0 ? selectedIndex : 0

  nextTick(() => {
    if (openDirection.value === 'up' && listRef.value) {
      listHeight.value = listRef.value.offsetHeight
    } else {
      listHeight.value = 0
    }
  })
}

const labelTransformStyle = computed(() => {
  // label non flottant
  if (!shouldFloatLabel.value) {
    return {}
  }

  // fermé ou ouverture vers le bas : comportement classique
  if (!isOpen.value || openDirection.value === 'down') {
    return {
      transform: 'translateY(-1.15rem) scale(0.9)',
    }
  }

  // ouverture vers le haut : on remonte en fonction de la hauteur de la liste
  const extraOffset = 8 // marge visuelle au-dessus de la liste en px
  const total = 4 +listHeight.value + extraOffset
  // 18 ≈ 1.15rem pour garder la même base que votre flottant actuel

  return {
    transform: `translateY(-${total}px) scale(0.9)`,
  }
})

function close() {
  isOpen.value = false
}

function toggle() {
  if (props.disabled) return
  if (isOpen.value) {
    close()
    return
  }
  open()
}

function select(value: string | number | null) {
  emit('update:modelValue', value)
  close()
}

function onClickOutside(e: MouseEvent) {
  if (!root.value) return
  if (!root.value.contains(e.target as Node)) close()
}

onMounted(() => document.addEventListener('mousedown', onClickOutside))
onBeforeUnmount(() => document.removeEventListener('mousedown', onClickOutside))
</script>

<style scoped>
.floating-label {
  background: white;
  padding: 0 0.25rem;
}

:deep(ul[role="listbox"]) {
  scrollbar-width: auto;
}

:deep(.select-scrollbar-primary) {
  scrollbar-color: rgb(var(--m-primary)) transparent;
}

:deep(.select-scrollbar-error) {
  scrollbar-color: #000000 transparent;
}

:deep(.select-scrollbar-success) {
  scrollbar-color: #000000 transparent;
}

</style>