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Monorepo for Tangled
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Svelte
at icy/tmrrpn
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687<script lang="ts"> import { untrack } from "svelte"; import { FileDiff, type FileDiffMetadata } from "@pierre/diffs"; import { clearPierreRender, pierreDiffOptions, type DiffStyle } from "./pierre";
interface Props { files: FileDiffMetadata[]; // side-by-side vs stacked diffStyle?: DiffStyle; // server-prerendered shadow dom, aligned with files. only set for the // initial ssr, client navigations let pierre paint on its own prerenderedHTML?: (string | undefined)[]; }
let { files, diffStyle = "unified", prerenderedHTML = [] }: Props = $props();
let container: HTMLElement | undefined = $state();
let mounted: { instance: FileDiff; file: FileDiffMetadata }[] = []; // the style at hydrate time, the options effect skips right after a // (re)mount let mountedStyle: DiffStyle | undefined;
// pierre does not update on its own. hydrate paints once per file, prop // changes re-render. diffStyle is read untracked so a toggle re-renders // through the effect below, a remount would lose expanded hunks const mountAll = (source: FileDiffMetadata[], html: (string | undefined)[]) => { const host = container; if (!host) return; for (const { instance } of mounted) instance.cleanUp(); mounted = [];
mounted = source.map((file, index) => { const element = host.children[index] as HTMLElement; // the html prop never reaches the client, pierre marks its ssr // output with data-dehydrated. a style toggle lands here with the // previous style's render: drop it, keep pierre's own style nodes if ( html[index] === undefined && element.shadowRoot?.querySelector("[data-dehydrated]") == null ) clearPierreRender(element); const instance = new FileDiff( pierreDiffOptions(untrack(() => diffStyle)), undefined, true ); instance.hydrate({ fileDiff: file, fileContainer: element, prerenderedHTML: html[index] }); return { instance, file }; }); mountedStyle = untrack(() => diffStyle); };
$effect(() => { mountAll(files, prerenderedHTML); return () => { for (const { instance } of mounted) instance.cleanUp(); mounted = []; }; });
$effect(() => { const style = diffStyle; if (style === mountedStyle) return; mountedStyle = style; for (const { instance, file } of mounted) { instance.setOptions(pierreDiffOptions(style)); instance.render({ fileDiff: file, forceRender: true }); } });</script>
<div bind:this={container} class="flex flex-col gap-4"> {#each files, index (index)} <diffs-container class="diffs-container"> {#if prerenderedHTML[index]} <!-- eslint-disable-next-line svelte/no-at-html-tags -- pierre's own renderer output, token text is escaped by its hast builder --> <template shadowrootmode="open">{@html prerenderedHTML[index]}</template> {/if} </diffs-container> {/each}</div>