Function ToolFileRead

web/components/tools/ToolFileRead.tsx:45–119

({
  input,
  result,
  isError = false,
  isRunning = false,
  startedAt,
  completedAt,
}: ToolFileReadProps)

const MAX_LINES_COLLAPSED = 40;

export function ToolFileRead({
  input,
  result,
  isError = false,
  isRunning = false,
  startedAt,
  completedAt,
}: ToolFileReadProps) {
  const [showAll, setShowAll] = useState(false);
  const lang = getLanguageFromPath(input.file_path);

  const lines = result?.split("\n") ?? [];
  const isTruncated = !showAll && lines.length > MAX_LINES_COLLAPSED;
  const displayContent = isTruncated
    ? lines.slice(0, MAX_LINES_COLLAPSED).join("\n")
    : (result ?? "");

  return (
    <ToolUseBlock
      toolName="read"
      toolInput={input}
      toolResult={result}
      isError={isError}
      isRunning={isRunning}
      startedAt={startedAt}
      completedAt={completedAt}
    >
      {/* File path header */}
      <div className="flex items-center gap-2 px-3 py-2 border-b border-surface-700/50 bg-surface-850">
        <FileIcon
          filePath={input.file_path}
          className="w-3.5 h-3.5 text-surface-400 flex-shrink-0"
        />
        <FileBreadcrumb filePath={input.file_path} />
        {(input.offset !== undefined || input.limit !== undefined) && (
          <span className="ml-auto text-xs text-surface-500 flex-shrink-0">
            {input.offset !== undefined && `offset: ${input.offset}`}
            {input.offset !== undefined && input.limit !== undefined && " · "}
            {input.limit !== undefined && `limit: ${input.limit}`}
          </span>
        )}
      </div>

      {/* Content */}
      {isRunning ? (
        <div className="px-3 py-4 text-surface-500 text-xs animate-pulse">
          Reading…
        </div>
      ) : isError ? (
        <div className="px-3 py-3 text-red-400 text-xs font-mono">{result}</div>
      ) : result ? (
        <div className="relative">
          <div className="overflow-auto max-h-[480px] [&_pre]:!bg-transparent [&_pre]:!m-0 [&_.shiki]:!bg-transparent">
            <SyntaxHighlight
              code={displayContent}
              lang={lang}
              className="text-xs [&_pre]:p-3 [&_pre]:leading-5"
            />