import com.intellij.refactoring.rename.NameSuggestionProvider; //导入依赖的package包/类
@Nullable
private static DictionarySuggestionProvider findProvider() {
  Object[] extensions = Extensions.getExtensions(NameSuggestionProvider.EP_NAME);

  for (Object extension : extensions) {
    if (extension instanceof DictionarySuggestionProvider) {
      return (DictionarySuggestionProvider)extension;
    }
  }
  return null;
}
 

import com.intellij.refactoring.rename.NameSuggestionProvider; //导入依赖的package包/类
private static LookupElement[] initLookupItems(LinkedHashSet<String> names,
                                               PsiNamedElement elementToRename, 
                                               PsiElement nameSuggestionContext,
                                               final boolean shouldSelectAll) {
  if (names == null) {
    names = new LinkedHashSet<String>();
    for (NameSuggestionProvider provider : Extensions.getExtensions(NameSuggestionProvider.EP_NAME)) {
      final SuggestedNameInfo suggestedNameInfo = provider.getSuggestedNames(elementToRename, nameSuggestionContext, names);
      if (suggestedNameInfo != null &&
          provider instanceof PreferrableNameSuggestionProvider &&
          !((PreferrableNameSuggestionProvider)provider).shouldCheckOthers()) {
        break;
      }
    }
  }
  final LookupElement[] lookupElements = new LookupElement[names.size()];
  final Iterator<String> iterator = names.iterator();
  for (int i = 0; i < lookupElements.length; i++) {
    final String suggestion = iterator.next();
    lookupElements[i] = LookupElementBuilder.create(suggestion).withInsertHandler(new InsertHandler<LookupElement>() {
      @Override
      public void handleInsert(InsertionContext context, LookupElement item) {
        if (shouldSelectAll) return;
        final Editor topLevelEditor = InjectedLanguageUtil.getTopLevelEditor(context.getEditor());
        final TemplateState templateState = TemplateManagerImpl.getTemplateState(topLevelEditor);
        if (templateState != null) {
          final TextRange range = templateState.getCurrentVariableRange();
          if (range != null) {
            topLevelEditor.getDocument().replaceString(range.getStartOffset(), range.getEndOffset(), suggestion);
          }
        }
      }
    });
  }
  return lookupElements;
}
 

import com.intellij.refactoring.rename.NameSuggestionProvider; //导入依赖的package包/类
@Nullable
private LookupElement[] createLookupItems(String name, Editor editor, PsiNamedElement psiVariable) {
  TemplateState templateState = TemplateManagerImpl.getTemplateState(editor);
  if (psiVariable != null) {
    final TextResult insertedValue =
      templateState != null ? templateState.getVariableValue(PRIMARY_VARIABLE_NAME) : null;
    if (insertedValue != null) {
      final String text = insertedValue.getText();
      if (!text.isEmpty() && !Comparing.strEqual(text, name)) {
        final LinkedHashSet<String> names = new LinkedHashSet<String>();
        names.add(text);
        for (NameSuggestionProvider provider : Extensions.getExtensions(NameSuggestionProvider.EP_NAME)) {
          final SuggestedNameInfo suggestedNameInfo = provider.getSuggestedNames(psiVariable, psiVariable, names);
          if (suggestedNameInfo != null &&
              provider instanceof PreferrableNameSuggestionProvider &&
              !((PreferrableNameSuggestionProvider)provider).shouldCheckOthers()) {
            break;
          }
        }
        final LookupElement[] items = new LookupElement[names.size()];
        final Iterator<String> iterator = names.iterator();
        for (int i = 0; i < items.length; i++) {
          items[i] = LookupElementBuilder.create(iterator.next());
        }
        return items;
      }
    }
  }
  return myLookupItems;
}
 

import com.intellij.refactoring.rename.NameSuggestionProvider; //导入依赖的package包/类
public static LinkedHashSet<String> getSuggestedNames(PsiElement psiElement, final PsiElement nameSuggestionContext) {
  final LinkedHashSet<String> result = new LinkedHashSet<String>();
  result.add(UsageViewUtil.getShortName(psiElement));
  final NameSuggestionProvider[] providers = Extensions.getExtensions(NameSuggestionProvider.EP_NAME);
  for (NameSuggestionProvider provider : providers) {
    SuggestedNameInfo info = provider.getSuggestedNames(psiElement, nameSuggestionContext, result);
    if (info != null) {
      if (provider instanceof PreferrableNameSuggestionProvider && !((PreferrableNameSuggestionProvider)provider).shouldCheckOthers()) {
        break;
      }
    }
  }
  return result;
}
 

import com.intellij.refactoring.rename.NameSuggestionProvider; //导入依赖的package包/类
@Nullable
private static ElementNameSuggestionProvider findProvider() {
    Object[] extensions = Extensions.getExtensions(NameSuggestionProvider.EP_NAME);

    for (Object extension : extensions) {
        if (extension instanceof ElementNameSuggestionProvider) {
            return (ElementNameSuggestionProvider) extension;
        }
    }
    return null;
}