private static List<TemplateImpl> listApplicableTemplates(PsiFile file, int offset) {
    Set<TemplateContextType> contextTypes =
        TemplateManagerImpl.getApplicableContextTypes(file, offset);

    final ArrayList<TemplateImpl> result = ContainerUtil.newArrayList();
    for (final TemplateImpl template : TemplateSettings.getInstance().getTemplates()) {
      if (!template.isDeactivated() && TemplateManagerImpl.isApplicable(template, contextTypes)) {
        result.add(template);
      }
    }
    return result;
  }
 @TestOnly
 public static void setTemplateTesting(Project project, Disposable parentDisposable) {
   final TemplateManagerImpl instance = (TemplateManagerImpl) getInstance(project);
   instance.myTemplateTesting = true;
   Disposer.register(
       parentDisposable,
       new Disposable() {
         @Override
         public void dispose() {
           instance.myTemplateTesting = false;
         }
       });
 }
  public static void setHighlighter(Editor editor, TemplateContext templateContext) {
    SyntaxHighlighter baseHighlighter = null;
    for (TemplateContextType type : TemplateManagerImpl.getAllContextTypes()) {
      if (templateContext.isEnabled(type)) {
        baseHighlighter = type.createHighlighter();
        if (baseHighlighter != null) break;
      }
    }
    if (baseHighlighter == null) {
      baseHighlighter = new PlainSyntaxHighlighter();
    }

    SyntaxHighlighter highlighter = createTemplateTextHighlighter(baseHighlighter);
    ((EditorEx) editor)
        .setHighlighter(
            new LexerEditorHighlighter(
                highlighter, EditorColorsManager.getInstance().getGlobalScheme()));
  }
  @Override
  public void actionPerformed(AnActionEvent e) {
    DataContext dataContext = e.getDataContext();
    final Editor editor = CommonDataKeys.EDITOR.getData(dataContext);
    PsiFile file = CommonDataKeys.PSI_FILE.getData(dataContext);

    final Project project = file.getProject();
    PsiDocumentManager.getInstance(project).commitAllDocuments();

    final TextRange selection =
        new TextRange(
            editor.getSelectionModel().getSelectionStart(),
            editor.getSelectionModel().getSelectionEnd());
    PsiElement current = file.findElementAt(selection.getStartOffset());
    int startOffset = selection.getStartOffset();
    while (current instanceof PsiWhiteSpace) {
      current = current.getNextSibling();
      if (current == null) break;
      startOffset = current.getTextRange().getStartOffset();
    }

    if (startOffset >= selection.getEndOffset()) startOffset = selection.getStartOffset();

    final PsiElement[] psiElements =
        PsiTreeUtil.collectElements(
            file,
            new PsiElementFilter() {
              @Override
              public boolean isAccepted(PsiElement element) {
                return selection.contains(element.getTextRange())
                    && element.getReferences().length > 0;
              }
            });

    final Document document =
        EditorFactory.getInstance()
            .createDocument(
                editor.getDocument().getText().substring(startOffset, selection.getEndOffset()));
    final boolean isXml = file.getLanguage().is(StdLanguages.XML);
    final int offsetDelta = startOffset;
    new WriteCommandAction.Simple(project, (String) null) {
      @Override
      protected void run() throws Throwable {
        Map<RangeMarker, String> rangeToText = new HashMap<RangeMarker, String>();

        for (PsiElement element : psiElements) {
          for (PsiReference reference : element.getReferences()) {
            if (!(reference instanceof PsiQualifiedReference)
                || ((PsiQualifiedReference) reference).getQualifier() == null) {
              String canonicalText = reference.getCanonicalText();
              LOG.assertTrue(canonicalText != null, reference.getClass());
              TextRange referenceRange = reference.getRangeInElement();
              final TextRange elementTextRange = element.getTextRange();
              LOG.assertTrue(elementTextRange != null, elementTextRange);
              final TextRange range =
                  elementTextRange.cutOut(referenceRange).shiftRight(-offsetDelta);
              final String oldText = document.getText(range);
              // workaround for Java references: canonicalText contains generics, and we need to cut
              // them off because otherwise
              // they will be duplicated
              int pos = canonicalText.indexOf('<');
              if (pos > 0 && !oldText.contains("<")) {
                canonicalText = canonicalText.substring(0, pos);
              }
              if (isXml) { // strip namespace prefixes
                pos = canonicalText.lastIndexOf(':');
                if (pos >= 0 && pos < canonicalText.length() - 1 && !oldText.contains(":")) {
                  canonicalText = canonicalText.substring(pos + 1);
                }
              }
              if (!canonicalText.equals(oldText)) {
                rangeToText.put(document.createRangeMarker(range), canonicalText);
              }
            }
          }
        }

        for (Map.Entry<RangeMarker, String> entry : rangeToText.entrySet()) {
          document.replaceString(
              entry.getKey().getStartOffset(), entry.getKey().getEndOffset(), entry.getValue());
        }
      }
    }.execute();

    final TemplateImpl template =
        new TemplateImpl(
            TemplateListPanel.ABBREVIATION, document.getText(), TemplateSettings.USER_GROUP_NAME);
    template.setToReformat(true);

    PsiFile copy;
    AccessToken token = WriteAction.start();
    try {
      copy = TemplateManagerImpl.insertDummyIdentifier(editor, file);
    } finally {
      token.finish();
    }
    Set<TemplateContextType> applicable =
        TemplateManagerImpl.getApplicableContextTypes(copy, startOffset);

    for (TemplateContextType contextType : TemplateManagerImpl.getAllContextTypes()) {
      template.getTemplateContext().setEnabled(contextType, applicable.contains(contextType));
    }

    final LiveTemplatesConfigurable configurable = new LiveTemplatesConfigurable();
    ShowSettingsUtil.getInstance()
        .editConfigurable(
            project, configurable, () -> configurable.getTemplateListPanel().addTemplate(template));
  }