Lazarus Pascal Requires Chilkat v11.7.0+

PDF Footnotes in Markdown: Inline, at the End, or Dropped

See more PDF Text Extraction Examples

Demonstrates the "footnotes" option of the "markdown" operation. Small-print notes at the foot of a page are kept where they are ("inline", the default), gathered at the end of the document ("end"), or left out ("none"). Lazarus Pascal

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Pdf,
  Chilkat.JsonObject;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  pdf: TPdf;
  json: TJsonObject;
  jsonOut: TJsonObject;

begin
  success := False;

  //  This example requires the Chilkat API to have been previously unlocked.
  //  See Global Unlock Sample for sample code.

  //  The two-page PDF used in this example is available at footnotes.pdf

  pdf := TPdf.Create;
  success := pdf.LoadFile('qa_data/pdf/footnotes.pdf');
  if (success = False) then
    begin
      WriteLn(pdf.LastErrorText);
      Exit;
    end;

  json := TJsonObject.Create;
  jsonOut := TJsonObject.Create;

  //  Page 1 has two superscript references in the text and the two notes in small print at its foot;
  //  page 2 has a third.
  success := pdf.ExtractText('markdown',json,jsonOut);
  if (success = False) then
    begin
      WriteLn(pdf.LastErrorText);
      Exit;
    end;
  WriteLn('---- footnotes: inline (default) ----');
  WriteLn(jsonOut.StringOf('markdown'));

  json.UpdateString('footnotes','end');
  success := pdf.ExtractText('markdown',json,jsonOut);
  if (success = False) then
    begin
      WriteLn(pdf.LastErrorText);
      Exit;
    end;
  WriteLn('---- footnotes: end ----');
  WriteLn(jsonOut.StringOf('markdown'));

  json.UpdateString('footnotes','none');
  success := pdf.ExtractText('markdown',json,jsonOut);
  if (success = False) then
    begin
      WriteLn(pdf.LastErrorText);
      Exit;
    end;
  WriteLn('---- footnotes: none ----');
  WriteLn(jsonOut.StringOf('markdown'));

  //  Sample output:

  //  ---- footnotes: inline (default) ----
  //  <!-- page 1 -->
  //  
  //  # The Lens on Loan
  //  
  //  The society located a fourth-order lens of the correct period at a museum1 in the next county, and an agreement to loan it for ten years was signed in November.2 The lens will be lit with a low-wattage electric lamp rather than oil, and it will be displayed as a historic light rather than registered as an aid to navigation.
  //  
  //  1 The county maritime museum, which holds three lenses from decommissioned lights. 2 The loan is renewable and carries no fee; the society insures the lens.
  //  
  //  <!-- page 2 -->
  //  
  //  # Public Access
  //  
  //  The grounds opened to visitors on weekends from July. Nearly three thousand people climbed the tower over the summer,3 with no incidents.
  //  
  //  3 Counted at the entrance by the volunteers on duty.
  //  
  //  ---- footnotes: end ----
  //  <!-- page 1 -->
  //  
  //  # The Lens on Loan
  //  
  //  The society located a fourth-order lens of the correct period at a museum1 in the next county, and an agreement to loan it for ten years was signed in November.2 The lens will be lit with a low-wattage electric lamp rather than oil, and it will be displayed as a historic light rather than registered as an aid to navigation.
  //  
  //  <!-- page 2 -->
  //  
  //  # Public Access
  //  
  //  The grounds opened to visitors on weekends from July. Nearly three thousand people climbed the tower over the summer,3 with no incidents.
  //  
  //  1 The county maritime museum, which holds three lenses from decommissioned lights. 2 The loan is renewable and carries no fee; the society insures the lens.
  //  
  //  3 Counted at the entrance by the volunteers on duty.
  //  
  //  ---- footnotes: none ----
  //  <!-- page 1 -->
  //  
  //  # The Lens on Loan
  //  
  //  The society located a fourth-order lens of the correct period at a museum1 in the next county, and an agreement to loan it for ten years was signed in November.2 The lens will be lit with a low-wattage electric lamp rather than oil, and it will be displayed as a historic light rather than registered as an aid to navigation.
  //  
  //  <!-- page 2 -->
  //  
  //  # Public Access
  //  
  //  The grounds opened to visitors on weekends from July. Nearly three thousand people climbed the tower over the summer,3 with no incidents.


  pdf.Free;
  json.Free;
  jsonOut.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.