问题
I am looking for a library which will allow me to render text and graphics output onto a PDF document. (Cairo is certainly an option.) I would like to know how OpenOffice writes PDF files to see if I could use the same library. What library is being used by OpenOffice for PDF export?
Edit: I am looking for a C or C++ library.
回答1:
I looked everywhere to find out how to export any document to PDF using OpenOffice. I finally found a buried post in the OpenOffice forums that got me 90% there. Here is my 100% solution. Works with OpenOffice 3.1. You must install OpenOffice to use this code. You must include references to cli_basetypes, cli_cppuhelper, cli_oootypes, cli_ure, cli_uretypes. These dll references are found in the OpenOffice SDK. Sorry, but this is in C#.. not C/C++. HTH someone.
using unoidl.com.sun.star.lang; using unoidl.com.sun.star.uno; using unoidl.com.sun.star.bridge; using unoidl.com.sun.star.frame; using unoidl.com.sun.star.beans; public static void ConvertToPDF(string inputFile, string outputFile) { if (ConvertExtensionToFilterType(Path.GetExtension(inputFile)) == null) throw new InvalidProgramException("Unknown file type for OpenOffice. File = " + inputFile); StartOpenOffice(); //Get a ComponentContext unoidl.com.sun.star.uno.XComponentContext xLocalContext = uno.util.Bootstrap.bootstrap(); //Get MultiServiceFactory unoidl.com.sun.star.lang.XMultiServiceFactory xRemoteFactory = (unoidl.com.sun.star.lang.XMultiServiceFactory) xLocalContext.getServiceManager(); //Get a CompontLoader XComponentLoader aLoader = (XComponentLoader)xRemoteFactory.createInstance("com.sun.star.frame.Desktop"); //Load the sourcefile XComponent xComponent = null; try { xComponent = initDocument(aLoader, PathConverter(inputFile), "_blank"); //Wait for loading while (xComponent == null) { System.Threading.Thread.Sleep(1000); } // save/export the document saveDocument(xComponent, inputFile, PathConverter(outputFile)); } catch { throw; } finally { xComponent.dispose(); } } private static void StartOpenOffice() { Process[] ps = Process.GetProcessesByName("soffice.exe"); if (ps != null) { if (ps.Length > 0) return; else { Process p = new Process(); p.StartInfo.Arguments = "-headless -nofirststartwizard"; p.StartInfo.FileName = "soffice.exe"; p.StartInfo.CreateNoWindow = true; bool result = p.Start(); if (result == false) throw new InvalidProgramException("OpenOffice failed to start."); } } else { throw new InvalidProgramException("OpenOffice not found. Is OpenOffice installed?"); } } private static XComponent initDocument(XComponentLoader aLoader, string file, string target) { PropertyValue[] openProps = new PropertyValue[1]; openProps[0] = new PropertyValue(); openProps[0].Name = "Hidden"; openProps[0].Value = new uno.Any(true); XComponent xComponent = aLoader.loadComponentFromURL( file, target, 0, openProps); return xComponent; } private static void saveDocument(XComponent xComponent, string sourceFile, string destinationFile) { PropertyValue[] propertyValues = new PropertyValue[2]; propertyValues = new PropertyValue[2]; // Setting the flag for overwriting propertyValues[1] = new PropertyValue(); propertyValues[1].Name = "Overwrite"; propertyValues[1].Value = new uno.Any(true); //// Setting the filter name propertyValues[0] = new PropertyValue(); propertyValues[0].Name = "FilterName"; propertyValues[0].Value = new uno.Any(ConvertExtensionToFilterType(Path.GetExtension(sourceFile))); ((XStorable)xComponent).storeToURL(destinationFile, propertyValues); } private static string PathConverter(string file) { if (file == null || file.Length == 0) throw new NullReferenceException("Null or empty path passed to OpenOffice"); return String.Format("file:///{0}", file.Replace(@"\", "/")); } public static string ConvertExtensionToFilterType(string extension) { switch (extension) { case ".doc": case ".docx": case ".txt": case ".rtf": case ".html": case ".htm": case ".xml": case ".odt": case ".wps": case ".wpd": return "writer_pdf_Export"; case ".xls": case ".xlsb": case ".ods": return "calc_pdf_Export"; case ".ppt": case ".pptx": case ".odp": return "impress_pdf_Export"; default: return null; } } }
回答2:
What language are you working in? There are many PDF libraries out there. Search Stack Overflow for "pdf library [programming language]". There's tons of recommendations already.
OpenOffice uses the Sun PDF library as an extension to import PDFs, but I'm not sure what it uses to export them.
回答3:
PDFCreator has an API that can help you.
http://www.pdfforge.org/forum/open-discussion/3063-api-sdk-pdfcreator
来源:https://stackoverflow.com/questions/1868974/openoffice-pdf-export-library