private LocalizedAssemblyView GetOrImportAssemblyImpl(ParserContext parser, Token throwToken, string fullImportNameWithDots)
{
// TODO: allow importing from a user-specified locale
Locale fromLocale = parser.CurrentLocale;
string name = fullImportNameWithDots.Contains('.') ? fullImportNameWithDots.Split('.')[0] : fullImportNameWithDots;
string secondAttemptedKey = name;
AssemblyMetadata assemblyMetadata = this.assemblyFinder.GetAssemblyMetadataFromAnyPossibleKey(fromLocale.ID + ":" + name);
Locale effectiveLocale = fromLocale;
if (assemblyMetadata == null)
{
assemblyMetadata = this.assemblyFinder.GetAssemblyMetadataFromAnyPossibleKey(name);
if (assemblyMetadata != null &&
assemblyMetadata.SupportedLocales.Contains(fromLocale) &&
assemblyMetadata.InternalLocale != fromLocale)
{
// Coincidental cross-language collision.
return(null);
}
if (assemblyMetadata == null)
{
// Simply no matches at all.
return(null);
}
effectiveLocale = assemblyMetadata.InternalLocale;
}
// Are there any restrictions on importing that library from this location?
if (!assemblyMetadata.IsAllowedImport(parser.CurrentLibrary))
{
throw new ParserException(throwToken, "This library cannot be imported from here.");
}
// Ensure all secondary lookups for each locale is instantiated to make the upcoming code more readable.
if (!this.importedAssembliesByLocalizedName.ContainsKey(effectiveLocale))
{
this.importedAssembliesByLocalizedName[effectiveLocale] = new Dictionary <string, LocalizedAssemblyView>();
}
if (!this.importedAssembliesByLocalizedName.ContainsKey(assemblyMetadata.InternalLocale))
{
this.importedAssembliesByLocalizedName[assemblyMetadata.InternalLocale] = new Dictionary <string, LocalizedAssemblyView>();
}
// Check to see if this library has been imported before.
if (this.importedAssembliesById.ContainsKey(assemblyMetadata.ID))
{
// Is it imported by the same locale?
if (this.importedAssembliesByLocalizedName[effectiveLocale].ContainsKey(name))
{
// Then just return the previous instance as-is.
return(this.importedAssembliesByLocalizedName[effectiveLocale][name]);
}
// Wrap the previous instance in the new locale.
LocalizedAssemblyView output = new LocalizedAssemblyView(effectiveLocale, this.importedAssembliesById[assemblyMetadata.ID]);
this.importedAssembliesByLocalizedName[effectiveLocale][output.Name] = output;
return(output);
}
// If the assembly exists but hasn't been imported before, instantiate it and
// add it to all the lookups. This needs to happen before parsing the embedded
// code to prevent infinite recursion.
CompilationScope compilationScope = new CompilationScope(parser.BuildContext, assemblyMetadata);
this.assembliesAlreadyImportedIndexByKey[assemblyMetadata.CanonicalKey] = this.ImportedAssemblyScopes.Count;
this.ImportedAssemblyScopes.Add(compilationScope);
this.importedAssembliesById[assemblyMetadata.ID] = compilationScope;
LocalizedAssemblyView localizedView = new LocalizedAssemblyView(effectiveLocale, compilationScope);
this.importedAssembliesByLocalizedName[effectiveLocale][name] = localizedView;
// Parse the assembly.
parser.PushScope(compilationScope);
Dictionary <string, string> sourceCode = assemblyMetadata.GetSourceCode();
foreach (string file in sourceCode.Keys.OrderBy(s => s.ToLowerInvariant()))
{
string fakeName = "[" + file + "]";
string code = sourceCode[file];
parser.ParseFile(fakeName, code);
}
parser.PopScope();
return(localizedView);
}