From dbb1826b617fdd7f6b94f86d18e2fe31b26e9218 Mon Sep 17 00:00:00 2001
From: Neko Ayaka <neko@ayaka.moe>
Date: Sat, 20 Dec 2025 18:49:26 +0800
Subject: [PATCH] feat(ui): new SelectTab component

---
 .../src/components/misc/SelectTab.story.vue   |  86 +++++++++++++
 .../components/Form/SelectTab/SelectTab.vue   | 121 ++++++++++++++++++
 .../ui/src/components/Form/SelectTab/index.ts |   1 +
 packages/ui/src/components/Form/index.ts      |   1 +
 4 files changed, 209 insertions(+)
 create mode 100644 packages/stage-ui/src/components/misc/SelectTab.story.vue
 create mode 100644 packages/ui/src/components/Form/SelectTab/SelectTab.vue
 create mode 100644 packages/ui/src/components/Form/SelectTab/index.ts

diff --git a/packages/stage-ui/src/components/misc/SelectTab.story.vue b/packages/stage-ui/src/components/misc/SelectTab.story.vue
new file mode 100644
index 000000000..34860b860
--- /dev/null
+++ b/packages/stage-ui/src/components/misc/SelectTab.story.vue
@@ -0,0 +1,86 @@
+<script setup lang="ts">
+import { SelectTab } from '@proj-airi/ui'
+import { ref } from 'vue'
+
+const focusMode = ref<'mode-1' | 'mode-2' | 'mode-3'>('mode-1')
+const quality = ref<'low' | 'balanced' | 'high'>('balanced')
+const locked = ref<'auto' | 'manual'>('auto')
+
+const focusOptions = [
+  {
+    label: 'Mode 1',
+    value: 'mode-1' as const,
+    icon: 'i-solar:widget-2-line-duotone',
+  },
+  {
+    label: 'Mode 2',
+    value: 'mode-2' as const,
+    icon: 'i-solar:menu-dots-line-duotone',
+  },
+  {
+    label: 'Mode 3',
+    value: 'mode-3' as const,
+    icon: 'i-solar:atoms-line-duotone',
+  },
+]
+
+const qualityOptions = [
+  { label: 'Light', value: 'low' as const },
+  { label: 'Balanced', value: 'balanced' as const },
+  { label: 'Detailed', value: 'high' as const },
+]
+
+const lockedOptions = [
+  { label: 'Auto sync', value: 'auto' as const },
+  { label: 'Manual', value: 'manual' as const },
+]
+</script>
+
+<template>
+  <Story
+    title="SelectTab"
+    group="misc"
+    :layout="{ type: 'single', width: '100%' }"
+  >
+    <template #controls>
+      <ThemeColorsHueControl />
+    </template>
+
+    <Variant
+      id="default"
+      title="Mode selection"
+    >
+      <div class="max-w-4xl w-full flex flex-col gap-4">
+        <SelectTab v-model="focusMode" :options="focusOptions" />
+        <p class="text-sm text-neutral-600 dark:text-neutral-300">
+          Selected mode: {{ focusMode }}
+        </p>
+      </div>
+    </Variant>
+
+    <Variant
+      id="with-descriptions"
+      title="Sizing and descriptions"
+    >
+      <div class="max-w-3xl w-full flex flex-col gap-4">
+        <SelectTab v-model="quality" size="sm" :options="qualityOptions" />
+        <p class="text-sm text-neutral-600 dark:text-neutral-300">
+          Rendering quality: {{ quality }}
+        </p>
+      </div>
+    </Variant>
+
+    <Variant
+      id="disabled-readonly"
+      title="Disabled and readonly states"
+    >
+      <div class="max-w-3xl w-full flex flex-col gap-4">
+        <SelectTab v-model="locked" :options="lockedOptions" disabled />
+        <SelectTab v-model="locked" :options="lockedOptions" readonly />
+        <p class="text-sm text-neutral-600 dark:text-neutral-300">
+          Locked selection mirrors both states: {{ locked }}
+        </p>
+      </div>
+    </Variant>
+  </Story>
+</template>
diff --git a/packages/ui/src/components/Form/SelectTab/SelectTab.vue b/packages/ui/src/components/Form/SelectTab/SelectTab.vue
new file mode 100644
index 000000000..29069bd30
--- /dev/null
+++ b/packages/ui/src/components/Form/SelectTab/SelectTab.vue
@@ -0,0 +1,121 @@
+<script setup lang="ts">
+import { RadioGroupItem, RadioGroupRoot } from 'reka-ui'
+import { computed } from 'vue'
+
+interface SelectTabOption {
+  label: string
+  value: string | number
+  description?: string
+  icon?: string
+}
+
+const props = withDefaults(defineProps<{
+  options: SelectTabOption[]
+  disabled?: boolean
+  readonly?: boolean
+  size?: 'sm' | 'md'
+}>(), {
+  disabled: false,
+  readonly: false,
+  size: 'md',
+})
+
+const modelValue = defineModel<string | number>({ required: true })
+
+const activeIndex = computed(() => props.options.findIndex(option => option.value === modelValue.value))
+const itemCount = computed(() => props.options.length || 1)
+const isDisabled = computed(() => props.disabled || props.readonly)
+
+const sizeClasses = computed(() =>
+  props.size === 'sm'
+    ? ['py-2', 'px-3', 'text-xs', 'rounded-md']
+    : ['py-2.5', 'px-3.5', 'text-sm', 'rounded-xl'],
+)
+
+const rootStyle = computed(() => ({
+  '--select-tab-count': String(itemCount.value),
+  '--select-tab-active-index': String(Math.max(activeIndex.value, 0)),
+  '--select-tab-padding': props.size === 'sm' ? '0px' : '0px',
+  '--select-tab-gap': '0.5rem',
+  '--select-tab-indicator-opacity': activeIndex.value === -1 ? '0' : '1',
+}))
+</script>
+
+<template>
+  <RadioGroupRoot
+    v-model="modelValue"
+    :disabled="isDisabled"
+    :aria-readonly="props.readonly"
+    :class="[
+      'select-tab',
+      'relative', 'flex', 'w-full', 'items-stretch', 'rounded-xl',
+      'bg-white-400/6', 'dark:bg-neutral-900/70',
+      'transition-[border-color,box-shadow,opacity]', 'duration-200', 'ease-out', 'border-2',
+      'border-neutral-100', 'dark:border-neutral-800',
+      isDisabled ? ['cursor-not-allowed', 'opacity-60'] : ['shadow-[0_14px_50px_-32px_rgba(0,0,0,0.55)]', 'backdrop-blur-sm'],
+      // before
+      'before:bg-primary-300/50', 'dark:before:bg-primary-400/50',
+      'before:rounded-lg', 'sm:before:rounded-xl',
+      'before:absolute', 'before:z-0', 'before:content-empty',
+      'before:transition-[left,width,opacity,background-color]', 'before:duration-200', 'before:ease',
+      'before:pointer-events-none',
+      'before:opacity-$select-tab-indicator-opacity',
+      'before:top-$select-tab-padding',
+    ]"
+    :style="[
+      rootStyle,
+      { padding: 'var(--select-tab-padding)', gap: 'var(--select-tab-gap)' },
+    ]"
+  >
+    <RadioGroupItem
+      v-for="option in props.options"
+      :key="option.value"
+      :value="option.value"
+      :disabled="isDisabled"
+      :aria-label="option.label"
+      :class="[
+        'select-tab__item',
+        'relative', 'z-1',
+        'flex', 'flex-1', 'items-center', 'justify-center', 'gap-2',
+        'text-center', 'text-neutral-700', 'dark:text-neutral-200', 'font-medium',
+        'transition-[color,background-color,border-color,transform]', 'duration-200', 'ease-out',
+        'focus-visible:border-none', 'focus-visible:outline-none',
+        sizeClasses,
+        isDisabled ? 'pointer-events-none' : 'cursor-pointer',
+        // checked
+        'data-[state=checked]:text-primary-950', 'dark:data-[state=checked]:text-primary-50',
+        // unchecked
+        'data-[state=unchecked]:hover:bg-primary-300/20', 'dark:data-[state=unchecked]:hover:bg-primary-400/20', 'data-[state=unchecked]:rounded-lg',
+      ]"
+    >
+      <span v-if="option.icon" :class="['size-4 shrink-0 text-current', option.icon]" />
+      <span :class="['truncate']">
+        {{ option.label }}
+      </span>
+    </RadioGroupItem>
+  </RadioGroupRoot>
+</template>
+
+<style scoped>
+.select-tab {
+  position: relative;
+  isolation: isolate;
+}
+
+.select-tab::before {
+  left:
+    calc(
+      (100% + var(--select-tab-gap))
+      / var(--select-tab-count)
+      * var(--select-tab-active-index)
+      + var(--select-tab-padding)
+    );
+  width:
+    calc(
+      (100% + var(--select-tab-gap))
+      / var(--select-tab-count)
+      - var(--select-tab-gap)
+    );
+  height: calc(100% - var(--select-tab-padding) * 2);
+}
+</style>
diff --git a/packages/ui/src/components/Form/SelectTab/index.ts b/packages/ui/src/components/Form/SelectTab/index.ts
new file mode 100644
index 000000000..82cad68eb
--- /dev/null
+++ b/packages/ui/src/components/Form/SelectTab/index.ts
@@ -0,0 +1 @@
+export { default as SelectTab } from './SelectTab.vue'
diff --git a/packages/ui/src/components/Form/index.ts b/packages/ui/src/components/Form/index.ts
index e3f4b0228..d4016cf50 100644
--- a/packages/ui/src/components/Form/index.ts
+++ b/packages/ui/src/components/Form/index.ts
@@ -5,4 +5,5 @@ export * from './Input'
 export * from './Radio'
 export * from './Range'
 export * from './Select'
+export * from './SelectTab'
 export * from './Textarea'