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Monorepo for Tangled
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Svelte
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394<script lang="ts"> import { SvelteSet } from "svelte/reactivity"; import PullDiffFileCard from "$lib/components/repo/pulls/PullDiffFileCard.svelte"; import { fetchSides, type FileContentsResult, type PullDiff, type PullDiffDeps, type PullDiffFile } from "$lib/api/pullDiff"; import type { Action } from "svelte/action"; import type { DiffStyle } from "$lib/components/repo/pierre";
interface Props { deps: PullDiffDeps; diff: PullDiff; diffStyle?: DiffStyle; allOpen?: boolean; stickyTop?: "page" | "viewport"; }
let { deps, diff, diffStyle = "unified", allOpen = true, stickyTop = "page" }: Props = $props();
const CONCURRENCY = 6; const LOOKAHEAD = "1500px 0px";
const byKey = $derived(new Map(diff.files.map((file) => [file.key, file])));
let entries = $state<Record<string, FileContentsResult>>({}); let running = 0; const queue: PullDiffFile[] = []; const started = new SvelteSet<string>();
const pump = () => { while (running < CONCURRENCY && queue.length > 0) void fill(queue.shift() as PullDiffFile); };
const fill = async (file: PullDiffFile) => { running++; entries[file.key] = await fetchSides(deps, diff.contents, file).catch(() => ({ note: "Contents could not be loaded." })); running--; pump(); };
const want = (key: string) => { if (started.has(key)) return; started.add(key); const file = byKey.get(key); if (file?.sides) { queue.push(file); pump(); } };
let io: IntersectionObserver | undefined; const observer = () => (io ??= new IntersectionObserver( (records) => { for (const record of records) { if (!record.isIntersecting) continue; const key = (record.target as HTMLElement).dataset.diffKey; if (key) want(key); } }, { rootMargin: LOOKAHEAD } ));
const observe: Action<HTMLElement> = (node) => { const active = observer(); active.observe(node); return { destroy: () => active.unobserve(node) }; };
$effect(() => () => { io?.disconnect(); io = undefined; });</script>
<div class="space-y-2 pb-2"> {#each diff.files as file (file.key)} <PullDiffFileCard {file} contents={entries[file.key]} {diffStyle} open={allOpen} {stickyTop} {observe} /> {/each}</div>