THPDFDocumentHandlerOptions Record

THPDFDocumentHandlerOptions = record
  MaxArchiveEntries: Integer;
  MaxArchiveCompressedBytes, MaxArchiveExpandedBytes: Int64;
  MaxArchiveEntryBytes: Int64;
  MaxCompressionRatio, MaxPasswordAttempts, MaxResources: Integer;
  MaxResourceBytes, MaxTotalResourceBytes: Int64;
  MaxPages: Integer;
  MaxReflowCharacters: Int64;
  MaxReflowNodes, MaxReflowCSSRules: Integer;
  MaxReflowOperations, MaxRenderedPixels: Int64;
  MaxRenderDPI: Integer;
  MaxOutputBytes: Int64;
  ReflowPageWidth, ReflowPageHeight: Single;
  ReflowMargin, ReflowFontSize: Single;
  ImageDPI: Integer;
  CancellationToken: THPDFCancellationToken;
  ArchivePasswordCallback: THPDFArchivePasswordCallback;
  class function Default: THPDFDocumentHandlerOptions; static;
end;

Default 提供一組有限的封存、資源、reflow、頁面、渲染、輸出與壓縮比上限，適合受信任的應用程式自行調整

所有正數上限在識別前都會先驗證，同一組選項在轉換、匯出與渲染期間持續生效

MaxPasswordAttempts 預設 3，可接受 1 到 16

ArchivePasswordCallback 會收到來源名稱、加密條目名稱與從 1 起算的嘗試次數；把 Handled 設為 False 就拒絕這次憑證請求

內建處理器只支援傳統 PKZIP ZipCrypto，憑證與解出的條目位元組會留在記憶體中、每次嘗試之間清掉；遇到缺少 Callback、憑證無效、被取消或加密不支援時一律回報失敗

選用文件處理器