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Monorepo for Tangled
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Svelte
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interface Props { files: PullDiffFile[]; diffStyle?: DiffStyle; // server-prerendered shadow dom per file key, only for the initial ssr prerendered?: Record<string, string>; // every card follows the toolbar's expand/collapse allOpen?: boolean; }
let { files, diffStyle = "unified", prerendered = {}, allOpen = true }: Props = $props();
// the diff endpoint hands us metadata only, so unlike the commit page we give // pierre both file contents and let it diff them — which is also what makes // hunk expansion work let rendered = $derived(files.filter((file) => file.oldFile && file.newFile));
let container: HTMLElement | undefined = $state(); let mounted: { instance: FileDiff; file: PullDiffFile }[] = []; // the style at hydrate time, so the options effect skips right after a mount let mountedStyle: DiffStyle | undefined;
const mountAll = (source: PullDiffFile[]) => { const host = container; if (!host) return; for (const { instance } of mounted) instance.cleanUp();
// one host per renderable file, in document order const hosts = host.querySelectorAll<HTMLElement>("diffs-container"); mounted = source.map((file, index) => { const element = hosts[index]; const html = prerendered[file.key]; // 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 === undefined && element.shadowRoot?.querySelector("[data-dehydrated]") == null) clearPierreRender(element); const instance = new FileDiff(pierreDiffOptions(untrack(() => diffStyle)), undefined, true); instance.hydrate({ oldFile: file.oldFile, newFile: file.newFile, fileContainer: element, prerenderedHTML: html }); return { instance, file }; }); mountedStyle = untrack(() => diffStyle); };
$effect(() => { mountAll(rendered); return () => { for (const { instance } of mounted) instance.cleanUp(); mounted = []; }; });
// a remount would lose expanded hunks, so a style change re-renders in place $effect(() => { const style = diffStyle; if (style === mountedStyle) return; mountedStyle = style; for (const { instance, file } of mounted) { instance.setOptions(pierreDiffOptions(style)); instance.render({ oldFile: file.oldFile, newFile: file.newFile, forceRender: true }); } });</script>
<div bind:this={container} class="space-y-4"> {#each files as file (file.key)} <div class="overflow-clip rounded-sm drop-shadow-xs"> <details id="file-{file.name}" open={allOpen} class="group w-full"> <summary class="sticky top-12 z-10 cursor-pointer list-none bg-background-canvas"> <div class="flex justify-between rounded-sm border border-border-default bg-background-default group-open:rounded-b-none" > <div class="flex items-center gap-2 p-2 typography-paragraph-small"> <ChevronRight class="inline size-4 shrink-0 group-open:hidden" aria-hidden="true" /> <ChevronDown class="hidden size-4 shrink-0 group-open:inline" aria-hidden="true" /> <DiffStatPill stat={{ ...file.stat, files_changed: 1 }} /> <span>{file.name}</span> </div> <!-- the appview's `Reviewed` checkbox goes here, with the localStorage review state that drives it --> <div class="flex items-center gap-2 px-2"></div> </div> </summary>
<div class="overflow-clip rounded-b-sm border-x border-b border-border-default"> {#if file.note} <div class="p-4 text-center typography-paragraph-small text-foreground-placeholder"> {file.note} </div> {:else} <diffs-container class="diffs-container"> {#if prerendered[file.key]} <!-- 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 prerendered[file.key]}</template> {/if} </diffs-container> {/if} </div> </details> </div> {/each}</div>