我正在寻找一个库,它允许我将文本和图形输出渲染到 PDF 文档上。 (Cairo当然是一个选项。)我想知道 OpenOffice 如何编写 PDF 文件,看看是否可以使用相同的库。 OpenOffice 使用哪个库进行 PDF 导出?
Edit:我正在寻找 C 或 C++ 库。
我四处寻找如何使用 OpenOffice 将任何文档导出为 PDF。我终于在 OpenOffice 论坛中找到了一个隐藏的帖子,这让我成功了 90%。这是我的 100% 解决方案。适用于 OpenOffice 3.1。您必须安装 OpenOffice 才能使用此代码。您必须包含对 cli_basetypes、cli_cppuhelper、cli_oootypes、cli_ure、cli_uretypes 的引用。这些 dll 引用可在 OpenOffice SDK 中找到。抱歉,这是 C# 语言,而不是 C/C++ 语言。 HTH某人。
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;
}
}
}
本文内容由网友自发贡献,版权归原作者所有,本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容,请联系:hwhale#tublm.com(使用前将#替换为@)