public void actionPerformed()

in psi_demo/src/main/java/org/intellij/sdk/psi/PsiNavigationDemoAction.java [23:58]
34 lines of code
7 McCabe index (conditional complexity)

  public void actionPerformed(AnActionEvent anActionEvent) {
    Editor editor = anActionEvent.getData(CommonDataKeys.EDITOR);
    PsiFile psiFile = anActionEvent.getData(CommonDataKeys.PSI_FILE);
    if (editor == null || psiFile == null) {
      return;
    }
    int offset = editor.getCaretModel().getOffset();

    final StringBuilder infoBuilder = new StringBuilder();
    PsiElement element = psiFile.findElementAt(offset);
    infoBuilder.append("Element at caret: ").append(element).append("\n");
    if (element != null) {
      PsiMethod containingMethod = PsiTreeUtil.getParentOfType(element, PsiMethod.class);
      infoBuilder
          .append("Containing method: ")
          .append(containingMethod != null ? containingMethod.getName() : "none")
          .append("\n");
      if (containingMethod != null) {
        PsiClass containingClass = containingMethod.getContainingClass();
        infoBuilder
            .append("Containing class: ")
            .append(containingClass != null ? containingClass.getName() : "none")
            .append("\n");

        infoBuilder.append("Local variables:\n");
        containingMethod.accept(new JavaRecursiveElementVisitor() {
          @Override
          public void visitLocalVariable(@NotNull PsiLocalVariable variable) {
            super.visitLocalVariable(variable);
            infoBuilder.append(variable.getName()).append("\n");
          }
        });
      }
    }
    Messages.showMessageDialog(anActionEvent.getProject(), infoBuilder.toString(), "PSI Info", null);
  }