Commenter (final PsiFile file, final Editor editor, final Language lineStartLanguage, final Language lineEndLanguage) { final FileViewProvider viewProvider = file.getViewProvider(); for (MultipleLangCommentProvider provider : MultipleLangCommentProvider.EP_NAME.getExtensions()) { if (provider.canProcess(file, viewProvider)) { return provider.getLineCommenter(file, editor, lineStartLanguage, lineEndLanguage); } } final Language fileLanguage = file.getLanguage(); Language lang = lineStartLanguage == null || LanguageCommenters.INSTANCE.forLanguage(lineStartLanguage) == null || fileLanguage.getBaseLanguage() == lineStartLanguage // file language is a more specific dialect of the line language ? fileLanguage : lineStartLanguage; if (viewProvider instanceof TemplateLanguageFileViewProvider && lang == ((TemplateLanguageFileViewProvider)viewProvider).getTemplateDataLanguage()) { lang = viewProvider.getBaseLanguage(); } return LanguageCommenters.INSTANCE.forLanguage(lang); }