public void actionPerformed()

in code_samples/editor_basics/src/main/java/org/intellij/sdk/editor/EditorIllustrationAction.java [32:51]

• 14 lines of code
• 3 McCabe index (conditional complexity)

  public void actionPerformed(@NotNull final AnActionEvent e) {
    // Get all the required data from data keys
    // Editor and Project were verified in update(), so they are not null.
    final Editor editor = e.getData(CommonDataKeys.EDITOR);
    if (editor == null) return;
    final Project project = e.getData(CommonDataKeys.PROJECT);
    if (project == null) return;
    final Document document = editor.getDocument();
    // Work off of the primary caret to get the selection info
    Caret primaryCaret = editor.getCaretModel().getPrimaryCaret();
    int start = primaryCaret.getSelectionStart();
    int end = primaryCaret.getSelectionEnd();
    // Replace the selection with a fixed string.
    // Must do this document change in a write action context.
    WriteCommandAction.runWriteCommandAction(project, () ->
        document.replaceString(start, end, "Replacement")
    );
    // De-select the text range that was just replaced
    primaryCaret.removeSelection();
  }