/// <summary>
/// Gets an object that represents a host-specific IVsContainedLanguageFactory implementation and
/// IVsHierarchy and itemId specific to currently active target framework.
/// </summary>
/// <param name="filePath">Path to a file</param>
/// <param name="hierarchy">Project hierarchy containing given file for current language service</param>
/// <param name="itemid">item id of the given file</param>
/// <param name="containedLanguageFactory">an instance of IVsContainedLanguageFactory specific for current language service</param>
/// <returns></returns>
public int GetContainedLanguageFactoryForFile(string filePath,
out IVsHierarchy hierarchy,
out uint itemid,
out IVsContainedLanguageFactory containedLanguageFactory)
{
uint myItemId = 0;
IVsHierarchy myHierarchy = null;
IVsContainedLanguageFactory myContainedLanguageFactory = null;
ProjectServices.ThreadingService.JoinableTaskFactory.Run(async() =>
{
await InitializeAsync().ConfigureAwait(false);
await ProjectServices.ThreadingService.JoinableTaskFactory.SwitchToMainThreadAsync();
var priority = new VSDOCUMENTPRIORITY[1];
HResult result = ProjectServices.VsProject.IsDocumentInProject(filePath,
out int isFound,
priority,
out myItemId);
if (result.Failed || isFound == 0)
{
return;
}
myHierarchy = (IVsHierarchy)ProjectHostProvider.UnconfiguredProjectHostObject.ActiveIntellisenseProjectHostObject;
var oleServiceProvider = ServiceProvider.GetService(typeof(IOLEServiceProvider)) as IOLEServiceProvider;
if (oleServiceProvider == null)
{
return;
}
myContainedLanguageFactory = (IVsContainedLanguageFactory)PackageUtilities.QueryService(
oleServiceProvider,
LanguageServiceGuid);
});
hierarchy = myHierarchy;
itemid = myItemId;
containedLanguageFactory = myContainedLanguageFactory;
return((myHierarchy == null || containedLanguageFactory == null)
? VSConstants.E_FAIL
: VSConstants.S_OK);
}