Tabs.svelte: the about panel's strip, shared with long reading pages
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Jm2auWk6RP71CjaAb4FMoG
This commit is contained in:
Eric Wagoner
co-authored by
Claude Opus 5.5
Claude Opus 5.5
parent
c55534dbd6
commit
6039b6c248
@@ -1,12 +1,8 @@
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<script lang="ts" module>
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import type { Snippet } from 'svelte';
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import type { Tab } from './Tabs.svelte';
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/** One section of the about panel: a tab and what it shows. */
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export interface AboutTab {
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id: string;
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label: string;
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body: Snippet;
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}
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export type AboutTab = Tab;
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</script>
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<script lang="ts">
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@@ -14,28 +10,15 @@
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// at a time rather than one long page. Opened from the hall's "about this
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// game" link (and #about); closes with its button, a click outside it, or
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// Escape. The tab last read is the one it reopens on.
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import { tick } from 'svelte';
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import Tabs from './Tabs.svelte';
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let { open = $bindable(false), tabs, title }: { open?: boolean; tabs: AboutTab[]; title: string } = $props();
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let current = $state('');
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const shown = $derived(tabs.find((t) => t.id === current) ?? tabs[0]);
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let tabButtons: HTMLButtonElement[] = $state([]);
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function onKey(e: KeyboardEvent) {
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if (open && e.key === 'Escape') open = false;
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}
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/** Arrow keys walk the tabs, as a tab list should; Home and End go to the ends. */
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async function onTabKey(e: KeyboardEvent, i: number) {
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const to = e.key === 'ArrowRight' ? i + 1 : e.key === 'ArrowLeft' ? i - 1 : e.key === 'Home' ? 0 : e.key === 'End' ? tabs.length - 1 : null;
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if (to === null) return;
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e.preventDefault();
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const next = (to + tabs.length) % tabs.length;
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current = tabs[next].id;
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await tick();
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tabButtons[next]?.focus();
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}
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</script>
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<svelte:window onkeydown={onKey} />
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@@ -47,24 +30,8 @@
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<h2 id="about-title">{title}</h2>
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<button type="button" class="close" aria-label="Close" onclick={() => (open = false)}>×</button>
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</header>
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<div class="tabs" role="tablist" aria-label="About this game">
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{#each tabs as t, i (t.id)}
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<button
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type="button"
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role="tab"
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id="about-tab-{t.id}"
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aria-controls="about-panel"
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aria-selected={shown.id === t.id}
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tabindex={shown.id === t.id ? 0 : -1}
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class:on={shown.id === t.id}
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bind:this={tabButtons[i]}
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onclick={() => (current = t.id)}
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onkeydown={(e) => onTabKey(e, i)}>{t.label}</button
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>
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{/each}
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</div>
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<div class="body" id="about-panel" role="tabpanel" aria-labelledby="about-tab-{shown.id}" tabindex="0">
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{@render shown.body()}
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<div class="body">
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<Tabs {tabs} label="About this game" bind:current />
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</div>
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</div>
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</div>
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@@ -110,39 +77,15 @@
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cursor: pointer;
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padding: 0.2rem 0.4rem;
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}
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.tabs {
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display: flex;
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flex-wrap: wrap;
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gap: 0.2rem 0.4rem;
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border-bottom: 1px solid var(--rule-strong);
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margin-bottom: 0.8rem;
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}
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.tabs button {
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background: none;
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border: none;
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border-bottom: 3px solid transparent;
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color: inherit;
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opacity: 0.75;
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font: inherit;
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padding: 0.35rem 0.5rem 0.4rem;
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cursor: pointer;
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}
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.tabs button.on {
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opacity: 1;
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border-bottom-color: currentColor;
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}
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.body {
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overflow: auto;
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min-height: 12rem;
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}
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.body :global(p + p) {
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margin-top: 0.7rem;
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}
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.body :global(h3) {
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font-size: 1.05rem;
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margin: 1rem 0 0.4rem;
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}
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.body :global(h3:first-child) {
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margin-top: 0;
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/* The tab strip stays in view while a long tab scrolls beneath it. */
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.body :global([role='tablist']) {
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position: sticky;
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top: 0;
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z-index: 1;
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background: var(--slate);
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}
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</style>
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@@ -0,0 +1,104 @@
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<script lang="ts" module>
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import type { Snippet } from 'svelte';
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/** One tab and what it shows. */
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export interface Tab {
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id: string;
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label: string;
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body: Snippet;
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}
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</script>
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<script lang="ts">
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// A strip of tabs over one panel, for a page or a dialog that would
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// otherwise be one long read. Arrow keys walk the tabs, Home and End go to
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// the ends. With `address`, the page's #fragment names the open tab, so a
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// link to /rules#syntax opens that tab and choosing a tab can be linked to.
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import { tick } from 'svelte';
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let { tabs, label, current = $bindable(''), address = false }: { tabs: Tab[]; label: string; current?: string; address?: boolean } = $props();
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const uid = $props.id();
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const shown = $derived(tabs.find((t) => t.id === current) ?? tabs[0]);
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let tabButtons: HTMLButtonElement[] = $state([]);
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$effect(() => {
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if (!address) return;
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const fromHash = () => {
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const id = location.hash.slice(1);
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if (tabs.some((t) => t.id === id)) current = id;
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};
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fromHash();
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window.addEventListener('hashchange', fromHash);
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return () => window.removeEventListener('hashchange', fromHash);
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});
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function choose(id: string) {
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current = id;
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if (address) history.replaceState(history.state, '', `${location.pathname}${location.search}#${id}`);
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}
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async function onKey(e: KeyboardEvent, i: number) {
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const to = e.key === 'ArrowRight' ? i + 1 : e.key === 'ArrowLeft' ? i - 1 : e.key === 'Home' ? 0 : e.key === 'End' ? tabs.length - 1 : null;
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if (to === null) return;
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e.preventDefault();
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const next = (to + tabs.length) % tabs.length;
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choose(tabs[next].id);
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await tick();
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tabButtons[next]?.focus();
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}
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</script>
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<div class="tabs" role="tablist" aria-label={label}>
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{#each tabs as t, i (t.id)}
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<button
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type="button"
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role="tab"
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id="{uid}-{t.id}"
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aria-controls="{uid}-panel"
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aria-selected={shown.id === t.id}
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tabindex={shown.id === t.id ? 0 : -1}
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class:on={shown.id === t.id}
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bind:this={tabButtons[i]}
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onclick={() => choose(t.id)}
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onkeydown={(e) => onKey(e, i)}>{t.label}</button
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>
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{/each}
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</div>
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<div class="panel" id="{uid}-panel" role="tabpanel" aria-labelledby="{uid}-{shown.id}" tabindex="0">
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{@render shown.body()}
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</div>
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<style>
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.tabs {
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display: flex;
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flex-wrap: wrap;
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gap: 0.2rem 0.4rem;
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border-bottom: 1px solid var(--rule-strong);
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margin: 0.6rem 0 0.8rem;
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}
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.tabs button {
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background: none;
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border: none;
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border-bottom: 3px solid transparent;
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color: inherit;
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opacity: 0.75;
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font: inherit;
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padding: 0.35rem 0.5rem 0.4rem;
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cursor: pointer;
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}
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.tabs button.on {
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opacity: 1;
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border-bottom-color: currentColor;
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}
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.panel :global(p + p) {
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margin-top: 0.7rem;
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}
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.panel :global(h3) {
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font-size: 1.05rem;
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margin: 1rem 0 0.4rem;
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}
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.panel :global(h3:first-child) {
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margin-top: 0;
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}
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</style>
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