@Nullable
public static Commenter getCommenter(
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);
}
private static boolean defaultFunctionalityWorked(final PsiLanguageInjectionHost host) {
final THashSet<String> languages = new THashSet<String>();
final List<Pair<PsiElement, TextRange>> files = InjectedLanguageUtil.getInjectedPsiFiles(host);
if (files == null) return false;
for (Pair<PsiElement, TextRange> pair : files) {
for (Language lang = pair.first.getLanguage(); lang != null; lang = lang.getBaseLanguage()) {
languages.add(lang.getID());
}
}
// todo there is a problem: host i.e. literal expression is confused with "target" i.e.
// parameter
// todo therefore this part doesn't work for java
return Configuration.getInstance().setHostInjectionEnabled(host, languages, false);
}
@Override
public FoldingBuilder forLanguage(Language l) {
FoldingBuilder cached = l.getUserData(getLanguageCache());
if (cached != null) return cached;
List<FoldingBuilder> extensions = forKey(l);
FoldingBuilder result;
if (extensions.isEmpty()) {
Language base = l.getBaseLanguage();
if (base != null) {
result = forLanguage(base);
} else {
result = getDefaultImplementation();
}
} else {
return (extensions.size() == 1)
? extensions.get(0)
: myBuilder == null ? myBuilder = new CompositeFoldingBuilder(extensions) : myBuilder;
}
l.putUserData(getLanguageCache(), result);
return result;
}