Code card

"use client";import * as React from "react";import { Check, ChevronDown, Copy } from "lucide-react";import { useCopy } from "@/components/ui/copy-button";import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";import { Tooltip, TooltipContent, TooltipTrigger } from "@/components/ui/tooltip";import { cn } from "@/lib/utils";// The playground's code card: the call straight on the card in mono with light highlighting (strings brand blue,// keywords and flags navy, numbers a lighter blue), folded to its first five lines until expanded, copy waiting in the// code's corner, and one quiet footer for everything about it: the language chip, the fold, and anything else (an// "Open in" row of agents). Long lines wrap rather than scroll sideways. Not clipped, so the language menu can open// over what's below.const COLLAPSED_LINES = 5;const KEYWORDS = "curl|const|let|await|import|from|return|require|def|func|package|use";const LITERALS = "true|false|True|False|null|None|nil";const TOKEN = new RegExp(`('[^']*'|"[^"]*"|--[a-z-]+|\\b(?:${KEYWORDS})\\b|\\b\\d+\\b|\\b(?:${LITERALS})\\b)`, "g");const KEYWORD = new RegExp(`^(${KEYWORDS})$`);const LITERAL = new RegExp(`^(\\d+|${LITERALS})$`);function tokenClass(token: string) {  if (/^['"]/.test(token)) return "text-fg-brand";  if (token.startsWith("--") || KEYWORD.test(token)) return "text-navy-60";  if (LITERAL.test(token)) return "text-blue-70";  return undefined;}/** One language's code. `display` is what the card shows when it differs from what Copy puts on the clipboard (a masked key). */export type CodeSample = { language: string; code: string; display?: string };export function CodeCard({  samples,  language: languageProp,  onLanguageChange,  defaultExpanded = false,  onCopy,  footer,  className,}: {  samples: CodeSample[];  /** The shown language, when the page keeps it (so every card on the page follows one pick). */  language?: string;  onLanguageChange?: (language: string) => void;  /** Whether every line shows at first; otherwise the code starts folded to its first few lines. */  defaultExpanded?: boolean;  onCopy?: (sample: CodeSample) => void;  /** Sits at the end of the footer, e.g. "Open in" and a row of CodeCardAction buttons. */  footer?: React.ReactNode;  className?: string;}) {  const [ownLanguage, setOwnLanguage] = React.useState(samples[0]?.language ?? "");  const language = languageProp ?? ownLanguage;  const setLanguage = (next: string) => {    setOwnLanguage(next);    onLanguageChange?.(next);  };  const [expanded, setExpanded] = React.useState(defaultExpanded);  const { hasCopied, copy } = useCopy();  const sample = samples.find((s) => s.language === language) ?? samples[0];  const lines = (sample?.display ?? sample?.code ?? "").split("\n");  const canExpand = lines.length > COLLAPSED_LINES;  const copyLabel = hasCopied ? "Copied" : "Copy code";  return (    <div data-slot="code-card" data-expanded={(expanded && canExpand) || undefined} className={cn("@container flex min-h-0 flex-col rounded-card bg-surface text-fg shadow-card", className)}>      <div className="ds-scrollbar relative min-h-0 flex-1 overflow-y-auto">        <pre className={cn("py-4 pr-14 pl-5 font-mono text-caption leading-code-card", !expanded && canExpand && "max-h-[122px] overflow-y-hidden")}>          <code>            {lines.map((line, i) => (              <span key={i} className="block min-h-[1.65em] whitespace-pre-wrap [overflow-wrap:anywhere]">                {line.split(TOKEN).map((part, j) => (                  <span key={j} className={tokenClass(part)}>                    {part}                  </span>                ))}              </span>            ))}          </code>        </pre>        {canExpand && !expanded && <div className="pointer-events-none absolute inset-x-0 bottom-0 h-12 bg-linear-to-t from-surface to-transparent" />}        <span className="absolute top-2.5 right-2.5 flex items-center">          <Tooltip>            <TooltipTrigger asChild>              <button                type="button"                onClick={() => {                  if (!sample) return;                  void copy(sample.code);                  onCopy?.(sample);                }}                aria-label={copyLabel}                className="grid size-8 place-items-center rounded-control text-fg-subtle outline-none transition-[color,background-color,scale] duration-150 ease-out hover:bg-wash-hover hover:text-fg focus-visible:ring-2 focus-visible:ring-focus-ring active:scale-[0.97] motion-reduce:active:scale-100"              >                {hasCopied ? <Check className="size-3.5 text-success" strokeWidth={1.75} /> : <Copy className="size-3.5" strokeWidth={1.5} />}              </button>            </TooltipTrigger>            <TooltipContent side="top">{copyLabel}</TooltipContent>          </Tooltip>        </span>      </div>      <div className="flex h-11 shrink-0 items-center gap-3 border-t border-line-subtle pr-3 pl-2 text-caption whitespace-nowrap text-fg-subtle">        {samples.length > 1 ? (          <Select value={sample?.language} onValueChange={setLanguage}>            <SelectTrigger appearance="chip" aria-label="Language">              <SelectValue />            </SelectTrigger>            <SelectContent position="popper" sideOffset={16} className="w-auto min-w-40">              {samples.map((s) => (                <SelectItem key={s.language} value={s.language}>                  {s.language}                </SelectItem>              ))}            </SelectContent>          </Select>        ) : (          sample && <span className="flex h-7 items-center rounded-sm bg-wash-hover px-2.5 text-fg-muted">{sample.language}</span>        )}        {canExpand && (          <button type="button" onClick={() => setExpanded((e) => !e)} className="flex items-center gap-1 outline-none transition-colors duration-150 hover:text-fg focus-visible:ring-2 focus-visible:ring-focus-ring">            <ChevronDown className={cn("size-3.5 transition-transform duration-200 ease-out motion-reduce:transition-none", expanded && "rotate-180")} strokeWidth={1.5} />            {expanded ? "Show less" : `Show all ${lines.length} lines`}          </button>        )}        {footer && <span className="ml-auto flex items-center gap-1">{footer}</span>}      </div>    </div>  );}/** A small icon button for the footer (an agent's mark in an "Open in" row), named by its tooltip. */export function CodeCardAction({ label, onClick, className, children }: { label: string; onClick?: () => void; className?: string; children: React.ReactNode }) {  return (    <Tooltip>      <TooltipTrigger asChild>        <button          type="button"          aria-label={label}          onClick={onClick}          className={cn("grid size-6 place-items-center rounded-sm text-fg outline-none transition-colors duration-150 hover:bg-wash-hover focus-visible:ring-2 focus-visible:ring-focus-ring [&_svg]:size-3.5", className)}        >          {children}        </button>      </TooltipTrigger>      <TooltipContent side="top">{label}</TooltipContent>    </Tooltip>  );}