public AbstractInplaceIntroducer(
      Project project,
      Editor editor,
      @Nullable E expr,
      @Nullable V localVariable,
      E[] occurrences,
      String title,
      final FileType languageFileType) {
    super(null, editor, project, title, occurrences, expr);
    myLocalVariable = localVariable;
    if (localVariable != null) {
      final PsiElement nameIdentifier = localVariable.getNameIdentifier();
      if (nameIdentifier != null) {
        myLocalMarker = createMarker(nameIdentifier);
      }
    } else {
      myLocalMarker = null;
    }
    myExprText = getExpressionText(expr);
    myLocalName = localVariable != null ? localVariable.getName() : null;

    myPreview = createPreviewComponent(project, languageFileType);
    myPreviewComponent = new JPanel(new BorderLayout());
    myPreviewComponent.add(myPreview.getComponent(), BorderLayout.CENTER);
    myPreviewComponent.setBorder(new EmptyBorder(2, 2, 6, 2));

    myWholePanel = new JPanel(new GridBagLayout());
    myWholePanel.setBorder(null);

    showDialogAdvertisement(getActionName());
  }
  /**
   * Begins the in-place refactoring operation.
   *
   * @return true if the in-place refactoring was successfully started, false if it failed to start
   *     and a dialog should be shown instead.
   */
  public boolean startInplaceIntroduceTemplate() {
    final boolean replaceAllOccurrences = isReplaceAllOccurrences();
    final Ref<Boolean> result = new Ref<>();
    CommandProcessor.getInstance()
        .executeCommand(
            myProject,
            () -> {
              final String[] names = suggestNames(replaceAllOccurrences, getLocalVariable());
              final V variable = createFieldToStartTemplateOn(replaceAllOccurrences, names);
              boolean started = false;
              if (variable != null) {
                int caretOffset = getCaretOffset();
                myEditor.getCaretModel().moveToOffset(caretOffset);
                myEditor.getScrollingModel().scrollToCaret(ScrollType.MAKE_VISIBLE);

                final LinkedHashSet<String> nameSuggestions = new LinkedHashSet<>();
                nameSuggestions.add(variable.getName());
                nameSuggestions.addAll(Arrays.asList(names));
                initOccurrencesMarkers();
                setElementToRename(variable);
                updateTitle(getVariable());
                started = super.performInplaceRefactoring(nameSuggestions);
                if (started) {
                  onRenameTemplateStarted();
                  myDocumentAdapter =
                      new DocumentAdapter() {
                        @Override
                        public void documentChanged(DocumentEvent e) {
                          if (myPreview == null) return;
                          final TemplateState templateState =
                              TemplateManagerImpl.getTemplateState(myEditor);
                          if (templateState != null) {
                            final TextResult value =
                                templateState.getVariableValue(
                                    InplaceRefactoring.PRIMARY_VARIABLE_NAME);
                            if (value != null) {
                              updateTitle(getVariable(), value.getText());
                            }
                          }
                        }
                      };
                  myEditor.getDocument().addDocumentListener(myDocumentAdapter);
                  updateTitle(getVariable());
                  if (TemplateManagerImpl.getTemplateState(myEditor) != null) {
                    myEditor.putUserData(ACTIVE_INTRODUCE, this);
                  }
                }
              }
              result.set(started);
              if (!started) {
                finish(true);
              }
            },
            getCommandName(),
            getCommandName());
    return result.get();
  }
  protected void updateTitle(@Nullable V variable, String value) {
    if (variable == null) return;

    final String variableText = variable.getText();
    final PsiElement identifier = variable.getNameIdentifier();
    if (identifier != null) {
      final int startOffsetInParent = identifier.getStartOffsetInParent();
      setPreviewText(
          variableText.substring(0, startOffsetInParent)
              + value
              + variableText.substring(startOffsetInParent + identifier.getTextLength()));
    } else {
      setPreviewText(variableText.replaceFirst(variable.getName(), value));
    }
    revalidate();
  }
  @Override
  protected void addHighlights(
      @NotNull Map<TextRange, TextAttributes> ranges,
      @NotNull Editor editor,
      @NotNull Collection<RangeHighlighter> highlighters,
      @NotNull HighlightManager highlightManager) {
    final TextAttributes attributes =
        EditorColorsManager.getInstance()
            .getGlobalScheme()
            .getAttributes(EditorColors.SEARCH_RESULT_ATTRIBUTES);
    final V variable = getVariable();
    if (variable != null) {
      final String name = variable.getName();
      LOG.assertTrue(name != null, variable);
      final int variableNameLength = name.length();
      if (isReplaceAllOccurrences()) {
        for (RangeMarker marker : getOccurrenceMarkers()) {
          final int startOffset = marker.getStartOffset();
          highlightManager.addOccurrenceHighlight(
              editor,
              startOffset,
              startOffset + variableNameLength,
              attributes,
              0,
              highlighters,
              null);
        }
      } else if (getExpr() != null) {
        final int startOffset = getExprMarker().getStartOffset();
        highlightManager.addOccurrenceHighlight(
            editor,
            startOffset,
            startOffset + variableNameLength,
            attributes,
            0,
            highlighters,
            null);
      }
    }

    for (RangeHighlighter highlighter : highlighters) {
      highlighter.setGreedyToLeft(true);
      highlighter.setGreedyToRight(true);
    }
  }