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

<script lang="ts">
	import {
		Display,
		type DisplaySize,
		type DisplayFamily,
		type DisplayWeight,
		type DisplayColor,
		type DisplayAlign,
		type DisplayTracking
	} from '$uix/eidos/components/display';
	import { compileMorfo } from '$uix/morfo';
	import { displayMorfo } from '@/uix/morfo/components/display';

	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);

	let size = $state<DisplaySize | ''>('');
	let family = $state<DisplayFamily | ''>('');
	let weight = $state<DisplayWeight | ''>('');
	let color = $state<DisplayColor | ''>('');
	let align = $state<DisplayAlign | ''>('');
	let tracking = $state<DisplayTracking | ''>('');
	let italic = $state(false);
	let underline = $state(false);
	let truncate = $state(false);
	let clamp = $state<number>(0);
	let content = $state('Welcome to UIX.');
	let asTag = $state<string>('h1');

	const sizes: DisplaySize[] = ['xxs', 'xs', 'sm', 'md', 'lg', 'xl', 'xxl', 'xxxl'];
	const families: DisplayFamily[] = ['primary', 'secondary', 'mono', 'display'];
	const weights: DisplayWeight[] = ['regular', 'medium', 'semibold', 'bold'];
	const colors: DisplayColor[] = ['primary', 'secondary', 'muted', 'disabled', 'on-solid'];
	const alignOptions = ['', 'start', 'center', 'end', 'justify'] as const;
	const trackingOptions = ['', 'tight', 'normal', 'wide'] as const;
	const tagOptions = ['h1', 'h2', 'div', 'p', 'span'] as const;

	const compiled = compileMorfo(displayMorfo);
	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();
	});

	const somaSnippet = $derived(
		[
			'<!-- Display is eidos-native — no soma layer. -->',
			'<!-- Equivalent semantic markup: -->',
			'',
			`<${asTag}`,
			'  data-display',
			tracking && `  data-tracking="${tracking}"`,
			'  style="font-family: var(--style-hero-font-family); …"',
			'>',
			`  ${content}`,
			`</${asTag}>`
		]
			.filter(Boolean)
			.join('\n')
	);

	const eidosSnippet = $derived(
		[
			"<script lang='ts'>",
			"  import { Display } from '$uix/eidos/components/display';",
			'</' + 'script>',
			'',
			'<Display',
			asTag !== 'h1' && `  as="${asTag}"`,
			size && `  size="${size}"`,
			family && `  family="${family}"`,
			weight && `  weight="${weight}"`,
			color && `  color="${color}"`,
			align && `  align="${align}"`,
			tracking && `  tracking="${tracking}"`,
			italic && '  italic',
			underline && '  underline',
			truncate && '  truncate',
			clamp > 0 && `  clamp={${clamp}}`,
			'>',
			'  ' + content,
			'</Display>'
		]
			.filter(Boolean)
			.join('\n')
	);
</script>

<div data-uix-canvas-inner>
	<header>
		<div data-uix-eyebrow>Typography · Display</div>
		<h1 data-uix-page-title>Display</h1>
		<p data-uix-page-lede>
			Hero / oversize typography primitive. Always uses the foundation's
			<code>--style-hero-*</code>
			tokens, which scale up at the <code>md</code> breakpoint. Default tag is
			<code>{`<h1>`}</code>
			(use <code>as</code> when the hero look is needed outside heading semantics). The
			<code>tracking</code>
			prop is the deliberate letter-spacing knob — at hero sizes the value is a design decision.
			Single part. Eidos-native: no soma backing, no semantic events.
		</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>responsive</span>md
			</span>
			<span data-uix-meta-pill>
				<span data-uix-meta-key>tracking</span>3
			</span>
			<span data-uix-meta-pill>
				<span data-uix-meta-key>scope</span>eidos
			</span>
		</div>
	</header>

	<div data-uix-stage>
		<div data-uix-stage-area bind:this={stageRef}>
			<div
				style="max-inline-size: 42rem; padding: var(--space-3); border: 1px dashed var(--color-neutral-border); border-radius: var(--radius-md);"
			>
				<Display
					as={asTag}
					size={size || undefined}
					family={family || undefined}
					weight={weight || undefined}
					color={color || undefined}
					align={align || undefined}
					tracking={tracking || undefined}
					{italic}
					{underline}
					{truncate}
					clamp={clamp > 0 ? clamp : undefined}
				>
					{content}
				</Display>
			</div>
		</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>style</span>
			<span>hero</span>
			<span style="margin-inline-start: auto;">
				<span data-uix-stage-trace-key>tag</span> &lt;{asTag}&gt; ·
				<span data-uix-stage-trace-key>tracking</span> {tracking || 'default'}
			</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>11</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>
				Display is eidos-native — no <span data-uix-layer-badge="soma">soma</span> split. Always
				consumes <code>--style-hero-*</code>; per-axis overrides write inline
				<code>--_display-*</code>
				CSS variables.
			</p>

			<div data-uix-subsection-head>
				<span data-uix-layer-badge="eidos">eidos</span> props · hero treatment
			</div>
			<div data-uix-controls>
				<label data-uix-control>
					<span data-uix-control-label>as <span data-uix-control-hint>rendered tag</span></span>
					<span data-uix-chips role="radiogroup">
						{#each tagOptions as opt}
							<button data-uix-chip data-active={asTag === opt} onclick={() => (asTag = opt)}>
								&lt;{opt}&gt;
							</button>
						{/each}
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>size override</span>
					<span data-uix-chips role="radiogroup">
						<button data-uix-chip data-active={size === ''} onclick={() => (size = '')}
							>inherit</button
						>
						{#each sizes as opt}
							<button data-uix-chip data-active={size === opt} onclick={() => (size = opt)}
								>{opt}</button
							>
						{/each}
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>family override</span>
					<span data-uix-chips role="radiogroup">
						<button data-uix-chip data-active={family === ''} onclick={() => (family = '')}
							>inherit</button
						>
						{#each families as opt}
							<button data-uix-chip data-active={family === opt} onclick={() => (family = opt)}
								>{opt}</button
							>
						{/each}
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>weight override</span>
					<span data-uix-chips role="radiogroup">
						<button data-uix-chip data-active={weight === ''} onclick={() => (weight = '')}
							>inherit</button
						>
						{#each weights as opt}
							<button data-uix-chip data-active={weight === opt} onclick={() => (weight = opt)}
								>{opt}</button
							>
						{/each}
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>color override</span>
					<span data-uix-chips role="radiogroup">
						<button data-uix-chip data-active={color === ''} onclick={() => (color = '')}
							>inherit</button
						>
						{#each colors as opt}
							<button data-uix-chip data-active={color === opt} onclick={() => (color = opt)}
								>{opt}</button
							>
						{/each}
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>align</span>
					<span data-uix-chips role="radiogroup">
						{#each alignOptions as opt}
							<button data-uix-chip data-active={align === opt} onclick={() => (align = opt)}
								>{opt || 'inherit'}</button
							>
						{/each}
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label
						>tracking <span data-uix-control-hint>letter-spacing</span></span
					>
					<span data-uix-chips role="radiogroup">
						{#each trackingOptions as opt}
							<button
								data-uix-chip
								data-active={tracking === opt}
								onclick={() => (tracking = opt)}>{opt || 'default'}</button
							>
						{/each}
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>italic</span>
					<span data-uix-switch>
						<input type="checkbox" bind:checked={italic} />
						<span data-uix-switch-label>{italic ? 'on' : 'off'}</span>
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>underline</span>
					<span data-uix-switch>
						<input type="checkbox" bind:checked={underline} />
						<span data-uix-switch-label>{underline ? 'on' : 'off'}</span>
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>truncate</span>
					<span data-uix-switch>
						<input type="checkbox" bind:checked={truncate} />
						<span data-uix-switch-label>{truncate ? 'on' : 'off'}</span>
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label
						>clamp <span data-uix-control-hint>multi-line cap (0 = off)</span></span
					>
					<input
						type="number"
						min="0"
						max="10"
						step="1"
						bind:value={clamp}
						style="inline-size: 6rem;"
					/>
				</label>
				<label data-uix-control style="grid-column: span 2;">
					<span data-uix-control-label>content</span>
					<input type="text" bind:value={content} style="inline-size: 100%; font: inherit;" />
				</label>
			</div>

			<div data-uix-code>
				<div data-uix-code-head>
					<span data-uix-layer-badge="soma">soma</span>
					<span>n/a · display is eidos-native — equivalent markup shown</span>
					<span data-uix-code-lang>svelte</span>
				</div>
				<pre><code>{somaSnippet}</code></pre>
			</div>

			<div data-uix-code style="margin-top: var(--uix-space-3);">
				<div data-uix-code-head>
					<span data-uix-layer-badge="eidos">eidos</span>
					<span>visual · hero style + per-axis overrides</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>
				Display always uses the foundation's <code>--style-hero-*</code> tokens. Per-axis props
				override individual fields without breaking the hero cascade. <code>tracking</code> maps
				to fixed em values because foundation letter-spacing tokens are mostly 0 at hero scale.
			</p>

			<div data-uix-subsection-head>Per-axis overrides</div>
			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>Prop</th><th>Type</th><th>Notes</th></tr></thead>
					<tbody>
						<tr
							><td class="name">size</td><td class="type"
								>'xxs' | 'xs' | 'sm' | 'md' | 'lg' | 'xl' | 'xxl' | 'xxxl'</td
							><td>Override the hero size step.</td></tr
						>
						<tr
							><td class="name">family</td><td class="type"
								>'primary' | 'secondary' | 'mono' | 'display'</td
							><td>Override the hero family.</td></tr
						>
						<tr
							><td class="name">weight</td><td class="type"
								>'regular' | 'medium' | 'semibold' | 'bold'</td
							><td>Override the hero weight.</td></tr
						>
						<tr
							><td class="name">color</td><td class="type"
								>'primary' | 'secondary' | 'muted' | 'disabled' | 'on-solid'</td
							><td>Content-role color slot.</td></tr
						>
						<tr
							><td class="name">align</td><td class="type"
								>'start' | 'center' | 'end' | 'justify'</td
							><td>Maps to <code>text-align</code>.</td></tr
						>
						<tr
							><td class="name">tracking</td><td class="type"
								>'tight' | 'normal' | 'wide'</td
							><td>Letter-spacing: -0.02em / 0 / 0.02em.</td></tr
						>
					</tbody>
				</table>
			</div>

			<div data-uix-subsection-head>Shorthand booleans + truncation</div>
			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>Prop</th><th>Type</th><th>Notes</th></tr></thead>
					<tbody>
						<tr><td class="name">italic</td><td class="type">boolean</td><td><code>font-style: italic</code>.</td></tr>
						<tr><td class="name">underline</td><td class="type">boolean</td><td><code>text-decoration: underline</code>.</td></tr>
						<tr><td class="name">truncate</td><td class="type">boolean</td><td>Single-line ellipsis.</td></tr>
						<tr><td class="name">clamp</td><td class="type">number</td><td>Multi-line cap via <code>-webkit-line-clamp</code>.</td></tr>
					</tbody>
				</table>
			</div>

			<div data-uix-subsection-head>Element + escape hatch</div>
			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>Prop</th><th>Type</th><th>Notes</th></tr></thead>
					<tbody>
						<tr><td class="name">as</td><td class="type">string</td><td>HTML tag. Default <code>'h1'</code>.</td></tr>
						<tr><td class="name">tagStyle</td><td class="type">string</td><td>Extra inline CSS.</td></tr>
					</tbody>
				</table>
			</div>

			<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;Heading size="9"&gt;</code></td><td>Radix uses a large heading size; UIX has a dedicated Display surface.</td></tr>
						<tr><td class="name">chakra-ui</td><td><code>&lt;Heading as="h1"&gt;</code></td><td>Chakra reuses Heading; UIX splits.</td></tr>
						<tr><td class="name">mantine</td><td><code>&lt;Title order={`{1}`}&gt;</code></td><td>Mantine's Title is the only heading primitive; UIX has Heading + Display.</td></tr>
						<tr><td class="name">mui Typography</td><td><code>variant="h1"</code></td><td>MUI's h1 ≈ UIX Display when consumer overrides <code>fontSize</code>.</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>{displayMorfo.name}</td></tr>
						<tr><td class="name">kebab</td><td><code>{displayMorfo.kebab}</code></td></tr>
						<tr><td class="name">scope</td><td>{displayMorfo.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);">
				The Provider stamps <code>data-display</code> on the rendered tag (default
				<code>{`<h1>`}</code>). The hero cascade is always-on; per-axis overrides come from
				<code>--_display-*</code>
				inline. <code>data-tracking</code> reflects the active tracking key for downstream
				styling.
			</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>
				Display declares no semantic events. As a passive primitive, it simply renders hero
				typography. Components that animate hero titles (landing-page entrance, dialog hero)
				compose Display inside an interactive surface that owns the relevant sema verb.
			</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/display/display.css</code>. The selector
				<code>[data-display]</code>
				applies the hero cascade. Per-axis overrides come from inline <code>--_display-*</code>
				CSS variables; tracking maps to fixed em values via the same channel.
			</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-display]</code></td><td><span data-uix-tag data-kind="morfo">morfo</span></td><td>Provider marker. Default hero-style applied.</td></tr>
						<tr><td class="name"><code>{`[data-display][data-italic|data-underline|data-truncate|data-clamp]`}</code></td><td><span data-uix-tag data-kind="eidos">eidos</span></td><td>Visual modifier flags.</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>Default tag <code>{`<h1>`}</code> — page-level heading. Use <code>as</code> when display typography is needed outside heading semantics (e.g. marketing pull-quote → <code>as="p"</code>).</td></tr>
						<tr><td class="name">Single h1 per page</td><td>Convention: only one <code>{`<h1>`}</code> per document. Display defaults to that; switch to <code>as</code> if a second hero appears.</td></tr>
						<tr><td class="name">Truncation + AT</td><td>CSS-only — full text remains in DOM. AT read the full hero.</td></tr>
						<tr><td class="name">Color contrast</td><td>Content-role colors meet WCAG AA. Free colors via <code>tagStyle</code> bypass that guarantee.</td></tr>
					</tbody>
				</table>
			</div>
		</section>
	{/if}
</div>