Convert Office documents (Excel word PowerPoint) to PDF using C++

//------------------------------------------------------------------------------
// Copyright (c) 2001-2023 by Apryse Software Inc. All Rights Reserved.
// Consult legal.txt regarding legal and license information.
//------------------------------------------------------------------------------

#include <iostream>
#include <sstream>
#include <PDF/PDFNet.h>
#include <PDF/Convert.h>
#include <PDF/OfficeToPDFOptions.h>
#include "../../LicenseKey/CPP/LicenseKey.h"

//------------------------------------------------------------------------------
// The following sample illustrates how to use the PDF::Convert utility class 
// to convert MS Office files to PDF
//
// This conversion is performed entirely within the PDFNet and has *no* 
// external or system dependencies dependencies -- Conversion results will be
// the same whether on Windows, Linux or Android.
//
// Please contact us if you have any questions.	
//------------------------------------------------------------------------------

using namespace pdftron;
using namespace PDF;

UString input_path = "../../TestFiles/";
UString output_path = "../../TestFiles/Output/";

void SimpleDocxConvert(UString input_filename, UString output_filename)
{
	// Start with a PDFDoc (the conversion destination)
	PDFDoc pdfdoc;

	// perform the conversion with no optional parameters
	Convert::OfficeToPDF(pdfdoc, input_path + input_filename, NULL);

	// save the result
	pdfdoc.Save(output_path + output_filename, SDF::SDFDoc::e_linearized, NULL);
	
	// And we're done!
	std::cout << "Saved " << output_filename << std::endl;
}

void FlexibleDocxConvert(UString input_filename, UString output_filename)
{
	// Start with a PDFDoc (the conversion destination)
	PDFDoc pdfdoc;

	OfficeToPDFOptions options;

	// set up smart font substitutions to improve conversion results
	// in situations where the original fonts are not available
	options.SetSmartSubstitutionPluginPath(input_path);

	// create a conversion object -- this sets things up but does not yet
	// perform any conversion logic.
	// in a multithreaded environment, this object can be used to monitor
	// the conversion progress and potentially cancel it as well
	DocumentConversion conversion = Convert::StreamingPDFConversion(
		pdfdoc, input_path + input_filename, &options);
	
	// Print the progress of the conversion.
	/*
	std::cout << "Status: " << conversion.GetProgress()*100 << "%, "
			<< conversion.GetProgressLabel() << std::endl;
	*/

	// actually perform the conversion
	// this particular method will not throw on conversion failure, but will
	// return an error status instead
		
	while (conversion.GetConversionStatus() == DocumentConversion::eIncomplete)
	{
		conversion.ConvertNextPage();
		// print out the progress status as we go
		/*
		std::cout << "Status: " << conversion.GetProgress()*100 << "%, "
			<< conversion.GetProgressLabel() << std::endl;
		*/
	}

	if(conversion.GetConversionStatus() == DocumentConversion::eSuccess)
	{
		int num_warnings = conversion.GetNumWarnings();
		
		// print information about the conversion 
		for (int i = 0; i < num_warnings; ++i)
		{
			std::cout << "Conversion Warning: " 
				<< conversion.GetWarningString(i) << std::endl;
		}

		// save the result
		pdfdoc.Save(output_path + output_filename, SDF::SDFDoc::e_linearized, NULL);
		// done
		std::cout << "Saved " << output_filename << std::endl;
	}
	else
	{
		std::cout << "Encountered an error during conversion: " 
			<< conversion.GetErrorString() << std::endl;
	}

	
}


int main(int argc, char *argv[])
{	
	// The first step in every application using PDFNet is to initialize the 
	// library. The library is usually initialized only once, but calling 
	// Initialize() multiple times is also fine.
	int ret = 0;

	PDFNet::Initialize(LicenseKey);
	PDFNet::SetResourcesPath("../../../Resources");

	try
	{
		// first the one-line conversion function
		SimpleDocxConvert("Fishermen.docx", "Fishermen.pdf");

		// then the more flexible line-by-line conversion API
		FlexibleDocxConvert("the_rime_of_the_ancient_mariner.docx",
			"the_rime_of_the_ancient_mariner.pdf");

		// conversion of RTL content
		FlexibleDocxConvert("factsheet_Arabic.docx", "factsheet_Arabic.pdf");
	}
	catch (Common::Exception& e)
	{
		std::cout << e << std::endl;
		ret = 1;
	}
	catch (...)
	{
		std::cout << "Unknown Exception" << std::endl;
		ret = 1;
	}

	PDFNet::Terminate();
	std::cout << "Done.\n";
	return ret;
}