Dart 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. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // 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

  final pdf = CkPdf();
  try {
    pdf.loadFile('qa_data/pdf/code_block.pdf');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final json = CkJsonObject();
  final jsonOut = CkJsonObject();

  try {
    pdf.extractText('markdown', json, jsonOut);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('---- default (code: true) ----');
  print(jsonOut.stringOf('markdown'));

  json.updateBool('code', false);
  try {
    pdf.extractText('markdown', json, jsonOut);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('---- code: false ----');
  print(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.
}