com.intellij.psi.templateLanguages.TemplateDataLanguageMappings#com.intellij.openapi.fileTypes.TemplateLanguageFileType源码实例Demo

public FileTypePatternDialog(@Nullable String initialPatterns, FileType fileType, Language templateDataLanguage) {
  myPatternField.setText(initialPatterns);

  if (fileType instanceof TemplateLanguageFileType) {
    final DefaultComboBoxModel model = (DefaultComboBoxModel) myLanguageCombo.getModel();
    model.addElement(null);
    final List<Language> languages = TemplateDataLanguageMappings.getTemplateableLanguages();
    Collections.sort(languages, new Comparator<Language>() {
      @Override
      public int compare(final Language o1, final Language o2) {
        return o1.getID().compareTo(o2.getID());
      }
    });
    for (Language language : languages) {
      model.addElement(language);
    }
    myLanguageCombo.setRenderer(new ListCellRendererWrapper() {
      @Override
      public void customize(JList list, Object value, int index, boolean selected, boolean hasFocus) {
        setText(value == null ? "" : ((Language) value).getDisplayName());
        if (value != null) {
          final FileType type = ((Language)value).getAssociatedFileType();
          if (type != null) {
            setIcon(TargetAWT.to(type.getIcon()));
          }
        }
      }
    });
    myLanguageCombo.setSelectedItem(templateDataLanguage);
  } else {
    myLanguageCombo.setVisible(false);
    myTemplateDataLanguageButton.setVisible(false);
  }
}