Lazarus Pascal Requires Chilkat v11.7.0+

Code Blocks and Code Spans in PDF to Markdown

See more PDF Text Extraction Examples

Demonstrates how monospaced text is converted by the "markdown" operation: a monospaced block becomes a fenced code block and a monospaced run inside a sentence becomes a code span. Set "code" to false to treat it as ordinary text. 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 PDF used in this example is available at code_block.pdf

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

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

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

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

  //  Sample output:

  //  ---- default (code: true) ----
  //  <!-- page 1 -->
  //  
  //  # Extracting Text
  //  
  //  Load the PDF and call `ExtractText` with the operation and an options object. The result is returned as JSON:
  //  
  //  ```
  //  new Pdf pdf;
  //  success = pdf.LoadFile("report.pdf");
  //  new JsonObject json;
  //  new JsonObject jsonOut;
  //  success = pdf.ExtractText("text",json,jsonOut);
  //  println jsonOut.StringOf("text");
  //  ```
  //  
  //  An empty options object extracts every page with the default clean-up. Set `pages` to limit the extraction.
  //  ---- code: false ----
  //  <!-- page 1 -->
  //  
  //  # Extracting Text
  //  
  //  Load the PDF and call ExtractText with the operation and an options object. The result is returned as JSON:
  //  
  //  new Pdf pdf; success = pdf.LoadFile("report.pdf"); new JsonObject json; new JsonObject jsonOut; success = pdf.ExtractText("text",json,jsonOut); println jsonOut.StringOf("text");
  //  
  //  An empty options object extracts every page with the default clean-up. Set pages to limit the extraction.


  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.