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Convert Office documents (Excel word PowerPoint) to PDF using Ruby

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Sample Ruby code for using PDFTron SDK to convert Office documents to PDF (including Word, Excel, PowerPoint and Publisher) without needing any external dependencies or MS Office licenses. Office to PDF conversion can be performed on a Linux or Windows server to automate Office-centric workflows, or entirely in the user's client (web browser, mobile device). The conversion functionality can be combined with our Viewer to display or annotate Office files (docx, xlsx, pptx) on all major platforms, including Web, Android, iOS, Xamarin, UWP, and Windows. Learn more about our Ruby PDF Library and Office Document Conversion Library.

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#---------------------------------------------------------------------------------------
# Copyright (c) 2001-2020 by PDFTron Systems Inc. All Rights Reserved.
# Consult LICENSE.txt regarding license information.
#---------------------------------------------------------------------------------------

require '../../../PDFNetC/Lib/PDFNetRuby'
include PDFNetRuby

$stdout.sync = true

#------------------------------------------------------------------------------
# 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.
#------------------------------------------------------------------------------

# Relative path to the folder containing the test files.
$inputPath = "../../TestFiles/"
$outputPath = "../../TestFiles/Output/"

def SimpleDocxConvert(input_filename, output_filename)
    # Start with a PDFDoc (the conversion destination)
    pdfdoc = PDFDoc.new()

    # perform the conversion with no optional parameters
    inputFile = $inputPath + input_filename
    Convert.OfficeToPDF(pdfdoc, inputFile, nil)

    # save the result
    outputFile = $outputPath + output_filename
    pdfdoc.Save(outputFile, SDFDoc::E_linearized)

    # And we're done!
    puts "Saved " + output_filename
end

def FlexibleDocxConvert(input_filename, output_filename)
    # Start with a PDFDoc (the conversion destination)
    pdfdoc = PDFDoc.new()

    options = OfficeToPDFOptions.new() 

    # set up smart font substitutions to improve conversion results
    # in situations where the original fonts are not available
    inputFile = $inputPath 
    options.SetSmartSubstitutionPluginPath(inputFile)

    # 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
    inputFile = $inputPath + input_filename
    conversion = Convert.StreamingPDFConversion(pdfdoc, inputFile, options)

    # Print the progress of the conversion.
    # puts  "Status " + (conversion.GetProgress()*100).to_s + "%, " +
    #        conversion.GetProgressLabel()

    # 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
        # puts "Status " + (conversion.GetProgress()*100).to_s + "%, " +
        #     conversion.GetProgressLabel()
    end

    if(conversion.GetConversionStatus() == DocumentConversion::ESuccess)
        num_warnings = conversion.GetNumWarnings()
        # print information about the conversion
        for i in 0..num_warnings-1 
            puts "Conversion Warning " + conversion.GetWarningString(i)
        end

        # save the result
        outputFile = $outputPath + output_filename
        pdfdoc.Save(outputFile, SDFDoc::E_linearized)
        # done
        puts "Saved " + output_filename 
    else
        puts "Encountered an error during conversion " + conversion.GetErrorString()
    end
    
end


def main()
    # 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.
    PDFNet.Initialize()
    PDFNet.SetResourcesPath("../../../Resources")

    # first the one-line conversion function
    SimpleDocxConvert("simple-word_2007.docx", "simple-word_2007.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")

    puts "Done."
end

main()
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