private static string GetFolderPathCore(SpecialFolder folder, SpecialFolderOption option)
{
WinRTInteropCallbacks callbacks = WinRTInterop.UnsafeCallbacks;
return(callbacks != null && callbacks.IsAppxModel() ?
callbacks.GetFolderPath(folder, option) :
null);
}
/// <summary>
/// Gets the default user culture from WinRT, if available.
/// </summary>
/// <remarks>
/// This method may return null, if there is no default user culture or if WinRT isn't available.
/// </remarks>
private static CultureInfo GetUserDefaultCultureCacheOverride()
{
WinRTInteropCallbacks callbacks = WinRTInterop.UnsafeCallbacks;
if (callbacks != null && callbacks.IsAppxModel())
{
return((CultureInfo)callbacks.GetUserDefaultCulture());
}
return(null);
}
internal static bool ReportUnhandledError(Exception e)
{
System.IntPtr pRestrictedErrorInfo = IntPtr.Zero;
if (e != null)
{
try
{
#if ENABLE_WINRT
// Only report to the WinRT global exception handler in modern apps
WinRTInteropCallbacks callbacks = WinRTInterop.Callbacks;
if (callbacks == null || !callbacks.IsAppxModel())
{
return(false);
}
// Get the IUnknown for the current exception and originate it as a langauge error in order to have
// Windows generate an IRestrictedErrorInfo corresponding to the exception object. We can then
// notify the global error handler that this IRestrictedErrorInfo instance represents an exception that
// went unhandled in managed code.
if (OriginateLanguageException(e) && TryGetRestrictedErrorInfo(out pRestrictedErrorInfo))
{
return(ExternalInterop.RoReportUnhandledError(pRestrictedErrorInfo) >= 0);
}
#else
return(false);
#endif // ENABLE_WINRT
}
catch (Exception)
{
// We can't give an exception in this code, so we simply swallow the exception here.
}
finally
{
McgMarshal.ComSafeRelease(pRestrictedErrorInfo);
}
}
// If we have got here, then some step of the pInvoke failed, which means the GEH was not invoked
return(false);
}
// Only call SetAppXConfiguration from ResourceManager constructors, and nowhere else.
// Throws MissingManifestResourceException and WinRT HResults
private void SetAppXConfiguration()
{
Debug.Assert(UseUapResourceManagement == false); // Only this function writes to this member
Debug.Assert(_WinRTResourceManager == null); // Only this function writes to this member
Debug.Assert(_PRIonAppXInitialized == false); // Only this function writes to this member
Debug.Assert(_PRIExceptionInfo == null); // Only this function writes to this member
bool bUsingSatelliteAssembliesUnderAppX = false;
if (MainAssembly != null)
{
if (MainAssembly != typeof(object).Assembly) // We are not loading resources for System.Private.CoreLib
{
#if ENABLE_WINRT
WinRTInteropCallbacks callbacks = WinRTInterop.UnsafeCallbacks;
if (callbacks != null && callbacks.IsAppxModel())
#else
if (ApplicationModel.IsUap)
#endif
{
// If we have the type information from the ResourceManager(Type) constructor, we use it. Otherwise, we use BaseNameField.
string reswFilename = _locationInfo == null ? BaseNameField : _locationInfo.FullName;
// The only way this can happen is if a class inherited from ResourceManager and
// did not set the BaseNameField before calling the protected ResourceManager() constructor.
// For other constructors, we would already have thrown an ArgumentNullException by now.
// Throwing an ArgumentNullException now is not the right thing to do because technically
// ResourceManager() takes no arguments, and because it is not documented as throwing
// any exceptions. Instead, let's go through the rest of the initialization with this set to
// an empty string. We may in fact fail earlier for another reason, but otherwise we will
// throw a MissingManifestResourceException when GetString is called indicating that a
// resW filename called "" could not be found.
if (reswFilename == null)
{
reswFilename = string.Empty;
}
if (!bUsingSatelliteAssembliesUnderAppX)
{
UseUapResourceManagement = !ShouldUseSatelliteAssemblyResourceLookupUnderAppX(MainAssembly);
if (UseUapResourceManagement)
{
// Only now are we certain that we need the PRI file.
// At this point it is important NOT to set UseUapResourceManagement to false
// if the PRI file does not exist because we are now certain we need to load PRI
// resources. We want to fail by throwing a MissingManifestResourceException
// if WindowsRuntimeResourceManager.Initialize fails to locate the PRI file. We do not
// want to fall back to using satellite assemblies anymore. Note that we would not throw
// the MissingManifestResourceException from this function, but from GetString. See the
// comment below on the reason for this.
_WinRTResourceManager = GetWinRTResourceManager();
try
{
_PRIonAppXInitialized = _WinRTResourceManager.Initialize(MainAssembly.Location, reswFilename, out _PRIExceptionInfo);
// Note that _PRIExceptionInfo might be null - this is OK.
// In that case we will just throw the generic
// MissingManifestResource_NoPRIresources exception.
// See the implementation of GetString for more details.
}
// We would like to be able to throw a MissingManifestResourceException here if PRI resources
// could not be loaded for a recognized reason. However, the ResourceManager constructors
// that call SetAppXConfiguration are not documented as throwing MissingManifestResourceException,
// and since they are part of the portable profile, we cannot start throwing a new exception type
// as that would break existing portable libraries. Hence we must save the exception information
// now and throw the exception on the first call to GetString.
catch (FileNotFoundException)
{
// We will throw MissingManifestResource_NoPRIresources from GetString
// when we see that _PRIonAppXInitialized is false.
}
catch (Exception e)
{
// ERROR_MRM_MAP_NOT_FOUND can be thrown by the call to ResourceManager.get_AllResourceMaps
// in WindowsRuntimeResourceManager.Initialize.
// In this case _PRIExceptionInfo is now null and we will just throw the generic
// MissingManifestResource_NoPRIresources exception.
// See the implementation of GetString for more details.
if (e.HResult != HResults.ERROR_MRM_MAP_NOT_FOUND)
{
throw; // Unexpected exception code. Bubble it up to the caller.
}
}
if (!_PRIonAppXInitialized)
{
UseUapResourceManagement = false;
}
// Allow all other exception types to bubble up to the caller.
// Yes, this causes us to potentially throw exception types that are not documented.
// Ultimately the tradeoff is the following:
// -We could ignore unknown exceptions or rethrow them as inner exceptions
// of exceptions that the ResourceManager class is already documented as throwing.
// This would allow existing portable libraries to gracefully recover if they don't care
// too much about the ResourceManager object they are using. However it could
// mask potentially fatal errors that we are not aware of, such as a disk drive failing.
// The alternative, which we chose, is to throw unknown exceptions. This may tear
// down the process if the portable library and app don't expect this exception type.
// On the other hand, this won't mask potentially fatal errors we don't know about.
}
}
}
}
}
// MainAssembly == null should not happen but it can. See the comment on Assembly.GetCallingAssembly.
// However for the sake of 100% backwards compatibility on Win7 and below, we must leave
// _bUsingModernResourceManagement as false.
}