Signature - TPdf - PDFiumVCL

この API エントリでは識別子、シグネチャ、コードブロック、PDF 用語を元の表記のまま保持します。

Component: TPdf · Unit: PDFium

Indexed property — returns one digital-signature record (signer, reason, contact, byte range)

Syntax

property Signature[Index: Integer]: TPdfSignature; // read only

Description

Indexed read-only property that returns one digital-signature record (signer, reason, contact, byte range)

Requires Active to be True. The result is undefined when the index is outside the valid range; pass values in 0 .. SignatureCount - 1 (or use the array's Length for non-counted variants).

The returned record is a snapshot of the value at the time of the call; subsequent edits to the document do not modify previously returned records.

Parameters

Index Zero-based index in the range 0 .. SignatureCount - 1.

Remarks

The records are decoded lazily — the first access on a page may parse the /Annots, /Outlines, or /Names tree.
Edits made through TPdf (CreateAnnotation, DeleteAnnotation, etc.) invalidate any indices held by the application; re-enumerate after edits.
All coordinate fields use PDF user-space points with the origin at the bottom-left corner of the page.

Example

var
  I: Integer;
begin
  if not Pdf1.Active then Exit;
  for I := 0 to Pdf1.SignatureCount - 1 do
  begin
    // inspect Pdf1.Signature[I]
    Memo1.Lines.Add(IntToStr(I));
  end;
end;

Signature property