"use client"; import { CheckIcon, ChevronDownIcon, CopyIcon, FileBracesIcon, FileCodeIcon, FileIcon, FileTerminalIcon, GitCompareArrowsIcon, type LucideIcon, WrapTextIcon, } from "lucide-react"; import { AnimatePresence, motion, useReducedMotion } from "motion/react"; import { type KeyboardEvent, type ReactNode, useEffect, useId, useLayoutEffect, useMemo, useRef, useState } from "react"; import { Toggle } from "@/components/ui/toggle"; import { Tooltip, TooltipPopup, TooltipProvider, TooltipTrigger } from "@/components/ui/tooltip"; import { cn } from "@/lib/utils"; export type CodeLanguage = "ts" | "tsx" | "js" | "jsx" | "json" | "bash" | "text"; export interface CodeFile { name: string; code: string; language?: CodeLanguage; previous?: string; highlight?: (number | [number, number])[]; } export interface CodeBlockProps { files: CodeFile[]; defaultFile?: string; defaultDiff?: boolean; defaultWrap?: boolean; maxLines?: number; className?: string; } const LINE = 24; const PAD = 12; const spring = { type: "spring", stiffness: 520, damping: 42, mass: 0.8 } as const; type Tone = "plain" | "keyword" | "string" | "number" | "literal" | "comment" | "fn" | "type" | "tag" | "attr" | "punct" | "prop" | "muted"; const toneClass: Record = { plain: "", keyword: "text-violet-700 dark:text-violet-400", string: "text-emerald-700 dark:text-emerald-400", number: "text-amber-700 dark:text-amber-300", literal: "text-rose-700 dark:text-rose-400", comment: "text-muted-foreground italic", fn: "text-sky-700 dark:text-sky-400", type: "text-orange-700 dark:text-orange-300", tag: "text-sky-700 dark:text-sky-400", attr: "text-cyan-700 dark:text-cyan-300", punct: "text-muted-foreground", prop: "text-sky-800 dark:text-sky-300", muted: "text-muted-foreground", }; type Token = { text: string; tone: Tone }; const KEYWORDS = new Set( "import export from default function return const let var if else for while do switch case break continue new try catch finally throw await async class extends interface type enum implements public private protected readonly static as in of typeof instanceof void yield this super satisfies keyof declare".split( " ", ), ); const LITERALS = new Set(["true", "false", "null", "undefined", "NaN"]); function tokenizeScript(line: string, state: { inComment: boolean }): Token[] { const out: Token[] = []; let i = 0; let inTag = false; const push = (text: string, tone: Tone) => { if (text) out.push({ text, tone }); }; if (state.inComment) { const end = line.indexOf("*/"); if (end === -1) return [{ text: line, tone: "comment" }]; push(line.slice(0, end + 2), "comment"); i = end + 2; state.inComment = false; } while (i < line.length) { const rest = line.slice(i); let m: RegExpMatchArray | null; if (rest.startsWith("//")) { push(rest, "comment"); break; } if (rest.startsWith("/*")) { const end = rest.indexOf("*/", 2); if (end === -1) { push(rest, "comment"); state.inComment = true; break; } push(rest.slice(0, end + 2), "comment"); i += end + 2; continue; } if ((m = rest.match(/^(["'`])(?:\\.|(?!\1).)*\1?/))) { push(m[0], "string"); i += m[0].length; continue; } if ((m = rest.match(/^<\/?([A-Za-z][\w.]*)/)) && !/[\w)\]]\s*$/.test(line.slice(0, i))) { const lead = m[0].startsWith("" || (ch === "/" && line[i + 1] === ">")) inTag = false; push(ch, /[\s]/.test(ch) ? "plain" : "punct"); i += 1; } return out; } function tokenizeJson(line: string): Token[] { const out: Token[] = []; const re = /("(?:\\.|[^"\\])*")(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d+)?(?:e[+-]?\d+)?|[{}[\],]/gi; let last = 0; for (const m of line.matchAll(re)) { const at = m.index ?? 0; if (at > last) out.push({ text: line.slice(last, at), tone: "plain" }); if (m[1]) { out.push({ text: m[1], tone: m[2] ? "prop" : "string" }); if (m[2]) out.push({ text: m[2], tone: "punct" }); } else if (m[3]) out.push({ text: m[0], tone: "literal" }); else if (/[{}[\],]/.test(m[0])) out.push({ text: m[0], tone: "punct" }); else out.push({ text: m[0], tone: "number" }); last = at + m[0].length; } if (last < line.length) out.push({ text: line.slice(last), tone: "plain" }); return out; } function tokenizeBash(line: string): Token[] { const out: Token[] = []; const re = /(#.*$)|("(?:\\.|[^"\\])*"|'[^']*')|(\$\{?\w+\}?)|(\s--?[\w-]+)|(&&|\|\||[|;>])|(\S+)|(\s+)/g; let expectCommand = true; for (const m of line.matchAll(re)) { const [text, comment, str, variable, flag, op, word] = m; if (comment && (m.index === 0 || /\s/.test(line[(m.index ?? 1) - 1]))) out.push({ text, tone: "comment" }); else if (str) out.push({ text, tone: "string" }); else if (variable) out.push({ text, tone: "attr" }); else if (flag) out.push({ text, tone: "muted" }); else if (op) { out.push({ text, tone: "punct" }); expectCommand = true; continue; } else if (word) { if (expectCommand && /^\w+=/.test(word)) out.push({ text, tone: "attr" }); else if (expectCommand) { out.push({ text, tone: "fn" }); expectCommand = false; } else out.push({ text, tone: /^\d+$/.test(word) ? "number" : "plain" }); } else out.push({ text, tone: "plain" }); } return out; } function tokenize(code: string, lang: CodeLanguage): Token[][] { const lines = code.split("\n"); const state = { inComment: false }; return lines.map((line) => { if (lang === "json") return tokenizeJson(line); if (lang === "bash") return tokenizeBash(line); if (lang === "text") return [{ text: line, tone: "plain" as Tone }]; return tokenizeScript(line, state); }); } function languageOf(file: CodeFile): CodeLanguage { if (file.language) return file.language; const ext = file.name.split(".").pop()?.toLowerCase() ?? ""; if (["ts", "mts", "cts"].includes(ext)) return "ts"; if (ext === "tsx") return "tsx"; if (["js", "mjs", "cjs"].includes(ext)) return "js"; if (ext === "jsx") return "jsx"; if (ext === "json") return "json"; if (["sh", "bash", "zsh"].includes(ext) || file.name.startsWith(".env")) return "bash"; return "text"; } function iconOf(lang: CodeLanguage): { Icon: LucideIcon; tone: string } { if (lang === "json") return { Icon: FileBracesIcon, tone: "text-amber-600 dark:text-amber-400" }; if (lang === "bash") return { Icon: FileTerminalIcon, tone: "text-muted-foreground" }; if (lang === "text") return { Icon: FileIcon, tone: "text-muted-foreground" }; return { Icon: FileCodeIcon, tone: "text-sky-600 dark:text-sky-400" }; } type DiffKind = "same" | "add" | "del"; interface Row { kind: DiffKind; tokens: Token[]; n?: number; } function diffLines(before: string[], after: string[]): { kind: DiffKind; from: "a" | "b"; i: number }[] { const a = before.length; const b = after.length; const lcs = Array.from({ length: a + 1 }, () => new Uint16Array(b + 1)); for (let i = a - 1; i >= 0; i--) { for (let j = b - 1; j >= 0; j--) { lcs[i][j] = before[i] === after[j] ? lcs[i + 1][j + 1] + 1 : Math.max(lcs[i + 1][j], lcs[i][j + 1]); } } const out: { kind: DiffKind; from: "a" | "b"; i: number }[] = []; let i = 0; let j = 0; while (i < a || j < b) { if (i < a && j < b && before[i] === after[j]) { out.push({ kind: "same", from: "b", i: j }); i++; j++; } else if (i < a && (j >= b || lcs[i + 1][j] >= lcs[i][j + 1])) { out.push({ kind: "del", from: "a", i }); i++; } else { out.push({ kind: "add", from: "b", i: j }); j++; } } return out; } function expandHighlight(spec: CodeFile["highlight"]): Set { const set = new Set(); for (const s of spec ?? []) { if (typeof s === "number") set.add(s); else for (let n = Math.min(...s); n <= Math.max(...s); n++) set.add(n); } return set; } function IconTip({ label, children }: { label: string; children: ReactNode }) { return ( {label} ); } function CopyButton({ text }: { text: string }) { const [copied, setCopied] = useState(false); const reduce = useReducedMotion(); useEffect(() => { if (!copied) return; const t = setTimeout(() => setCopied(false), 1500); return () => clearTimeout(t); }, [copied]); return ( ); } export function CodeBlock({ files, defaultFile, defaultDiff = false, defaultWrap = false, maxLines = 14, className, }: CodeBlockProps) { const reduce = useReducedMotion(); const uid = useId(); const [active, setActive] = useState(() => Math.max(0, files.findIndex((f) => f.name === defaultFile))); const [diff, setDiff] = useState(defaultDiff); const [wrap, setWrap] = useState(defaultWrap); const [expanded, setExpanded] = useState(false); const [marks, setMarks] = useState>>(() => Object.fromEntries(files.map((f) => [f.name, expandHighlight(f.highlight)])), ); const anchor = useRef(null); const tabRefs = useRef<(HTMLButtonElement | null)[]>([]); const bodyRef = useRef(null); const [fullHeight, setFullHeight] = useState(null); const file = files[active] ?? files[0]; const lang = languageOf(file); const canDiff = file.previous !== undefined; const showDiff = diff && canDiff; const highlighted = marks[file.name] ?? new Set(); const rows: Row[] = useMemo(() => { const now = tokenize(file.code, lang); if (!showDiff) return now.map((tokens, i) => ({ kind: "same", tokens, n: i + 1 })); const was = tokenize(file.previous ?? "", lang); return diffLines((file.previous ?? "").split("\n"), file.code.split("\n")).map((d) => d.from === "a" ? { kind: d.kind, tokens: was[d.i] } : { kind: d.kind, tokens: now[d.i], n: d.i + 1 }, ); }, [file, lang, showDiff]); const stats = useMemo(() => { if (!canDiff) return null; const d = diffLines((file.previous ?? "").split("\n"), file.code.split("\n")); return { add: d.filter((x) => x.kind === "add").length, del: d.filter((x) => x.kind === "del").length }; }, [file, canDiff]); const collapsible = maxLines > 0 && rows.length > maxLines + 2; const collapsedHeight = maxLines * LINE + PAD; useLayoutEffect(() => { const el = bodyRef.current; if (!el) return; const measure = () => setFullHeight(el.scrollHeight); measure(); const ro = new ResizeObserver(measure); ro.observe(el); return () => ro.disconnect(); }, []); const toggleMark = (n: number, extend: boolean) => { setMarks((prev) => { const next = new Set(prev[file.name]); if (extend && anchor.current !== null) { for (let k = Math.min(anchor.current, n); k <= Math.max(anchor.current, n); k++) next.add(k); } else if (next.has(n)) next.delete(n); else next.add(n); return { ...prev, [file.name]: next }; }); anchor.current = n; }; const selectTab = (i: number) => { setActive(i); setExpanded(false); anchor.current = null; }; const onTabKey = (e: KeyboardEvent) => { const step = e.key === "ArrowRight" ? 1 : e.key === "ArrowLeft" ? -1 : 0; if (!step) return; e.preventDefault(); const next = (active + step + files.length) % files.length; selectTab(next); tabRefs.current[next]?.focus(); }; const isCollapsed = collapsible && !expanded; const height = isCollapsed ? collapsedHeight : (fullHeight ?? undefined); return (
{files.map((f, i) => { const { Icon, tone } = iconOf(languageOf(f)); const selected = i === active; return ( ); })}
{canDiff && stats && ( +{stats.add} −{stats.del} )} 
                
                  {rows.map((row, idx) => {
                    const marked = row.n !== undefined && !showDiff && highlighted.has(row.n);
                    return (
                      

                         row.n !== undefined && !showDiff && toggleMark(row.n, e.shiftKey)}
                        >
                          {row.n ?? ""}
                        
                        {showDiff && (
                          
                            {row.kind === "add" ? "+" : row.kind === "del" ? "−" : ""}
                          
                        )}
                        {showDiff && row.kind !== "same" && (
                          {row.kind === "add" ? "added: " : "removed: "}
                        )}
                        
                          {row.tokens.length === 0 || (row.tokens.length === 1 && row.tokens[0].text === "") ? (
                            " "
                          ) : (
                            row.tokens.map((t, k) => (
                              
                                {t.text}
                              
                            ))
                          )}
                        
                      

                    );
                  })}
{isCollapsed && ( )} {collapsible && ( )}
); }