svelte-kit-vice/web/routes/uix/components/stack/+page.svelte

<script lang="ts">
	import { Stack, type StackProps, type StackDirection } from '$uix/eidos/components/stack';
	import { Box } from '$uix/eidos/components/box';
	import { compileMorfo } from '$uix/morfo';
	import { stackMorfo } from '@/uix/morfo/components/stack';

	type Tab = 'live' | 'api' | 'morfo' | 'sema' | 'recipe' | 'a11y';
	type TraceEntry = { event: string; family: string; intent?: string; at: number };
	let tab = $state<Tab>('live');
	let trace = $state<TraceEntry[]>([]);
	let stageRef = $state<HTMLElement | null>(null);

	// ── Live state — Stack container props ────────────────────────────────
	let direction = $state<StackDirection>('column');
	let align = $state<'stretch' | 'start' | 'center' | 'end' | 'baseline'>('stretch');
	let justify = $state<
		'start' | 'center' | 'end' | 'space-between' | 'space-around' | 'space-evenly' | 'stretch'
	>('start');
	let gap = $state<number>(3);
	let padding = $state<number>(4);

	const directionOptions = ['row', 'row-reverse', 'column', 'column-reverse'] as const;
	const alignOptions = ['stretch', 'start', 'center', 'end', 'baseline'] as const;
	const justifyOptions = [
		'start',
		'center',
		'end',
		'space-between',
		'space-around',
		'space-evenly',
		'stretch'
	] as const;

	const stackProps = $derived<Partial<StackProps>>({
		direction,
		align,
		justify,
		gap,
		padding
	});

	// ── Compiled morfo ────────────────────────────────────────────────────
	const compiled = compileMorfo(stackMorfo);
	const partsList = $derived([...compiled.parts.byKebab.values()]);
	const events = $derived([...compiled.actions.byName.values()]);

	$effect(() => {
		const el = stageRef;
		if (!el) return;
		const obs = new MutationObserver((mutations) => {
			for (const m of mutations) {
				if (m.attributeName !== 'data-event') continue;
				const target = m.target as Element;
				const ev = target.getAttribute('data-event');
				if (!ev) continue;
				trace = [
					{
						event: ev,
						family: target.getAttribute('data-event-family') ?? '—',
						intent: target.getAttribute('data-event-intent') ?? undefined,
						at: Date.now()
					},
					...trace
				].slice(0, 6);
			}
		});
		obs.observe(el, { attributes: true, subtree: true, attributeFilter: ['data-event'] });
		return () => obs.disconnect();
	});

	// ── Code snippet ──────────────────────────────────────────────────────
	const eidosSnippet = $derived(
		[
			"<script lang='ts'>",
			"  import { Stack } from '$uix/eidos/components/stack';",
			'</' + 'script>',
			'',
			'<Stack',
			direction !== 'column' && `  direction="${direction}"`,
			align !== 'stretch' && `  align="${align}"`,
			justify !== 'start' && `  justify="${justify}"`,
			gap > 0 && `  gap={${gap}}`,
			padding > 0 && `  padding={${padding}}`,
			'>',
			'  …',
			'</Stack>'
		]
			.filter(Boolean)
			.join('\n')
	);
</script>

<div data-uix-canvas-inner>
	<header>
		<div data-uix-eyebrow>Layout · Stack</div>
		<h1 data-uix-page-title>Stack</h1>
		<p data-uix-page-lede>
			Direction-controlled flex stack — vertical by default, horizontal when
			<code>direction="row"</code>. Thin specialization of
			<a href="/uix/components/flex">&lt;Flex&gt;</a> with locked nowrap and 4 ergonomic props
			(<code>direction</code>, <code>gap</code>, <code>align</code>, <code>justify</code>). For
			row-only clusters with edge-to-edge behaviour use
			<a href="/uix/components/group">&lt;Group&gt;</a>; for the full flex API (including
			<code>wrap</code> and per-axis gaps) drop down to <code>&lt;Flex&gt;</code>.
		</p>
		<div data-uix-page-meta>
			<span data-uix-meta-pill>
				<span data-uix-meta-key>parts</span>{compiled.parts.order.length}
			</span>
			<span data-uix-meta-pill>
				<span data-uix-meta-key>events</span>0
			</span>
			<span data-uix-meta-pill>
				<span data-uix-meta-key>extends</span>Flex
			</span>
			<span data-uix-meta-pill>
				<span data-uix-meta-key>scope</span>eidos
			</span>
		</div>
	</header>

	<!-- Live preview always rendered -->
	<div data-uix-stage>
		<div data-uix-stage-area bind:this={stageRef}>
			<Stack
				{...stackProps}
				style="border: 1px dashed var(--color-border-default); border-radius: var(--radius-md); min-block-size: 10rem; min-inline-size: 24rem;"
			>
				<Box
					padding={2}
					style="border: 1px solid var(--color-primary-border); border-radius: var(--radius-sm); background: var(--color-primary-track); color: var(--color-primary-text);"
				>Row A</Box>
				<Box
					padding={2}
					style="border: 1px solid var(--color-affirm-border); border-radius: var(--radius-sm); background: var(--color-affirm-track); color: var(--color-affirm-text);"
				>Row B</Box>
				<Box
					padding={2}
					style="border: 1px solid var(--color-risk-border); border-radius: var(--radius-sm); background: var(--color-risk-track); color: var(--color-risk-text);"
				>Row C</Box>
			</Stack>
		</div>
		<div data-uix-stage-trace>
			<span data-uix-stage-trace-key>trace</span>
			<span>{trace.length === 0 ? 'no semantic events' : `${trace.length} event(s)`}</span>
			<span style="color: var(--uix-text-faint)">·</span>
			<span data-uix-stage-trace-key>direction</span>
			<span>{direction}</span>
			<span style="margin-inline-start: auto;">
				<span data-uix-stage-trace-key>gap</span> {gap} ·
				<span data-uix-stage-trace-key>align</span> {align}
			</span>
		</div>
	</div>

	<div data-uix-tabs role="tablist">
		<button data-uix-tab data-active={tab === 'live'} onclick={() => (tab = 'live')}>Live</button>
		<button data-uix-tab data-active={tab === 'api'} onclick={() => (tab = 'api')}>
			API <span data-uix-tab-count>4</span>
		</button>
		<button data-uix-tab data-active={tab === 'morfo'} onclick={() => (tab = 'morfo')}>
			<span data-uix-layer-badge="morfo">morfo</span>
			<span data-uix-tab-count>{partsList.length}p · 0e</span>
		</button>
		<button data-uix-tab data-active={tab === 'sema'} onclick={() => (tab = 'sema')}>
			<span data-uix-layer-badge="sema">sema</span>
			<span data-uix-tab-count>{events.length}</span>
		</button>
		<button data-uix-tab data-active={tab === 'recipe'} onclick={() => (tab = 'recipe')}>Recipe</button>
		<button data-uix-tab data-active={tab === 'a11y'} onclick={() => (tab = 'a11y')}>A11y</button>
	</div>

	{#if tab === 'live'}
		<section data-uix-section>
			<h2 data-uix-section-title>Controls</h2>
			<p data-uix-section-desc>
				Stack is eidos-native — no <span data-uix-layer-badge="soma">soma</span> split. The
				4 container props below pass through to the underlying <code>&lt;Flex&gt;</code>.
				Stack also inherits every <a href="/uix/components/box">Box</a> prop (padding,
				margin, size, position) via Flex composition.
			</p>

			<div data-uix-subsection-head>
				<span data-uix-layer-badge="eidos">eidos</span> props · stack behaviour
			</div>
			<div data-uix-controls>
				<label data-uix-control>
					<span data-uix-control-label>direction</span>
					<span data-uix-chips role="radiogroup">
						{#each directionOptions as opt}
							<button
								data-uix-chip
								data-active={direction === opt}
								onclick={() => (direction = opt)}>{opt}</button
							>
						{/each}
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>align <span data-uix-control-hint>cross-axis</span></span>
					<span data-uix-chips role="radiogroup">
						{#each alignOptions as opt}
							<button data-uix-chip data-active={align === opt} onclick={() => (align = opt)}
								>{opt}</button
							>
						{/each}
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>justify <span data-uix-control-hint>main-axis</span></span>
					<span data-uix-chips role="radiogroup">
						{#each justifyOptions as opt}
							<button data-uix-chip data-active={justify === opt} onclick={() => (justify = opt)}
								>{opt}</button
							>
						{/each}
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>gap <span data-uix-control-hint>0–8 → var(--space-N)</span></span>
					<input type="number" min="0" max="8" step="1" bind:value={gap} style="inline-size: 6rem;" />
				</label>
				<label data-uix-control>
					<span data-uix-control-label>padding <span data-uix-control-hint>inherited from Box</span></span>
					<input
						type="number"
						min="0"
						max="8"
						step="1"
						bind:value={padding}
						style="inline-size: 6rem;"
					/>
				</label>
			</div>

			<!-- ── Code snippet (eidos-native — no soma layer) ──────────────── -->
			<div data-uix-code>
				<div data-uix-code-head>
					<span data-uix-layer-badge="eidos">eidos</span>
					<span>visual · 4 ergonomic props on top of Flex</span>
					<span data-uix-code-lang>svelte</span>
				</div>
				<pre><code>{eidosSnippet}</code></pre>
			</div>
		</section>
	{/if}

	{#if tab === 'api'}
		<section data-uix-section>
			<h2 data-uix-section-title>API reference</h2>
			<p data-uix-section-desc>
				Stack is a thin, opinionated specialization of <a href="/uix/components/flex"
					><code>&lt;Flex&gt;</code></a
				>: it locks <code>wrap</code> to nowrap, defaults <code>direction</code> to
				<code>column</code>, and exposes only the four most-used container props. Drop down to
				<code>&lt;Flex&gt;</code> when you need <code>wrap</code>, <code>rowGap</code>,
				<code>columnGap</code> or <code>inline</code>.
			</p>

			<div data-uix-subsection-head>Container props</div>
			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>Prop</th><th>Type</th><th>Default</th><th>Notes</th></tr></thead>
					<tbody>
						<tr><td class="name">direction</td><td class="type">row | row-reverse | column | column-reverse</td><td class="default">'column'</td><td><code>flex-direction</code>.</td></tr>
						<tr><td class="name">gap</td><td class="type">number | string</td><td class="default empty">—</td><td>Number → <code>var(--space-N)</code>.</td></tr>
						<tr><td class="name">align</td><td class="type">stretch | start | center | end | baseline | flex-start | flex-end</td><td class="default empty">—</td><td><code>align-items</code> — cross-axis.</td></tr>
						<tr><td class="name">justify</td><td class="type">start | center | end | space-between | space-around | space-evenly | stretch | flex-start | flex-end</td><td class="default empty">—</td><td><code>justify-content</code> — main-axis.</td></tr>
					</tbody>
				</table>
			</div>

			<div data-uix-subsection-head>Inherited from Box</div>
			<p data-uix-section-desc>
				Every <a href="/uix/components/box">BoxProps</a> field is forwarded through Flex:
				<code>padding*</code>, <code>margin*</code>, <code>width</code>, <code>height</code>,
				<code>position</code>, <code>top/right/bottom/left</code>, <code>overflow*</code>, plus
				item-side props (<code>alignSelf</code>, <code>gridColumn</code>, …).
			</p>

			<div data-uix-subsection-head>Not on Stack (use Flex instead)</div>
			<p data-uix-section-desc>
				<code>wrap</code>, <code>inline</code>, <code>rowGap</code>, <code>columnGap</code> —
				Stack intentionally omits these. Use <a href="/uix/components/flex"
					><code>&lt;Flex&gt;</code></a
				> when you need them.
			</p>

			<div data-uix-subsection-head>Reference comparison</div>
			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>Library</th><th>Closest equivalent</th><th>Difference</th></tr></thead>
					<tbody>
						<tr><td class="name">radix-themes</td><td><code>&lt;Flex direction="column"&gt;</code></td><td>Radix doesn't ship a separate Stack — they use Flex with direction. UIX names the direction-locked variant for the most common case.</td></tr>
						<tr><td class="name">chakra-ui</td><td><code>&lt;Stack&gt;</code> / <code>&lt;VStack&gt;</code> / <code>&lt;HStack&gt;</code></td><td>Chakra exposes three components (Stack/VStack/HStack). UIX collapses to a single Stack with a <code>direction</code> prop — <a href="/uix/components/group">&lt;Group&gt;</a> covers the row-cluster case.</td></tr>
						<tr><td class="name">mantine</td><td><code>&lt;Stack&gt;</code> / <code>&lt;Group&gt;</code></td><td>Mantine has the same split: vertical Stack + horizontal Group. UIX matches Mantine here.</td></tr>
					</tbody>
				</table>
			</div>
		</section>
	{/if}

	{#if tab === 'morfo'}
		<section data-uix-section>
			<h2 data-uix-section-title>Morfo contract</h2>

			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>Field</th><th>Value</th></tr></thead>
					<tbody>
						<tr><td class="name">name</td><td>{stackMorfo.name}</td></tr>
						<tr><td class="name">kebab</td><td><code>{stackMorfo.kebab}</code></td></tr>
						<tr><td class="name">scope</td><td>{stackMorfo.scope.join(', ')}</td></tr>
						<tr><td class="name">parts</td><td>{partsList.length}</td></tr>
						<tr><td class="name">events</td><td>0</td></tr>
					</tbody>
				</table>
			</div>

			<div data-uix-subsection-head>Parts</div>
			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>kebab</th><th>marker</th><th>element</th><th>archetype</th><th>optional</th></tr></thead>
					<tbody>
						{#each partsList as part}
							<tr>
								<td class="name">{part.kebab}</td>
								<td><code data-uix-part-marker>[{part.marker}]</code></td>
								<td class="type">&lt;{part.defaultElement}&gt;</td>
								<td class="type">{part.archetype}</td>
								<td class="default">{part.optional ? 'yes' : 'no'}</td>
							</tr>
						{/each}
					</tbody>
				</table>
			</div>

			<p data-uix-section-desc style="margin-top: var(--uix-space-4);">
				Stack composes through <code>&lt;Flex&gt;</code> which composes through
				<code>&lt;Box&gt;</code>, so the rendered DOM is a single
				<code>div[data-box][data-flex][data-stack]</code> shell. Recipe lives at
				<code>src/uix/eidos/components/stack/stack.css</code> — currently just the marker; all
				behaviour comes from the Flex layer.
			</p>
		</section>
	{/if}

	{#if tab === 'sema'}
		<section data-uix-section>
			<h2 data-uix-section-title>
				<span data-uix-layer-badge="sema">sema</span> · events
			</h2>
			<p data-uix-section-desc>
				Stack declares no semantic events. As a passive layout primitive, it does not commit,
				emerge, or react to anything — it just arranges its children. Components that animate
				on appearance should compose Stack with an interactive primitive (popover, drawer,
				collapsible) that owns the relevant sema verbs.
			</p>
		</section>
	{/if}

	{#if tab === 'recipe'}
		<section data-uix-section>
			<h2 data-uix-section-title>Eidos recipe</h2>
			<p data-uix-section-desc>
				Recipe lives in <code>src/uix/eidos/components/stack/stack.css</code> — currently
				declaration-only (the <code>[data-stack]</code> marker exists so consumers can target
				stacks specifically). All visual behaviour layers on top of the Flex recipe.
			</p>
			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>Selector</th><th>Owner</th><th>Purpose</th></tr></thead>
					<tbody>
						<tr>
							<td class="name"><code>[data-stack]</code></td>
							<td><span data-uix-tag data-kind="morfo">morfo</span></td>
							<td>Provider marker. Used by consumers for targeting; behaviour inherited from Flex.</td>
						</tr>
					</tbody>
				</table>
			</div>
		</section>
	{/if}

	{#if tab === 'a11y'}
		<section data-uix-section>
			<h2 data-uix-section-title>Accessibility</h2>
			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>Concern</th><th>Contract</th></tr></thead>
					<tbody>
						<tr><td class="name">Role</td><td>None implicit. Default element is <code>&lt;div&gt;</code> — semantically neutral. Wrap Stack in a landmark (<code>&lt;nav&gt;</code>, <code>&lt;section&gt;</code>, <code>&lt;ul role="list"&gt;</code>) when content needs one.</td></tr>
						<tr><td class="name">Label</td><td>Not applicable — Stack has no content semantics. Labels belong to the interactive children.</td></tr>
						<tr><td class="name">Keyboard</td><td>Stack is not focusable. Tab order follows DOM order even when <code>direction</code> visually reverses (<code>row-reverse</code> / <code>column-reverse</code>). Verify visual order matches focus order for keyboard users.</td></tr>
						<tr><td class="name">Reduced motion</td><td>Stack does not animate.</td></tr>
					</tbody>
				</table>
			</div>
		</section>
	{/if}
</div>