Method actionPerformed

app/src/processing/app/ui/Editor.java:1123–1151

(ActionEvent e)

    }

    public void actionPerformed(ActionEvent e) {
      stopCompoundEdit();

      try {
        final Integer caret = caretUndoStack.pop();
        caretRedoStack.push(caret);
        textarea.setCaretPosition(caret);
        textarea.scrollToCaret();
      } catch (Exception ignore) { }

      try {
        undo.undo();
      } catch (CannotUndoException ignored) { }

      updateUndoState();
      redoAction.updateRedoState();
      if (sketch != null) {
        sketch.setModified(!getText().equals(sketch.getCurrentCode().getSavedProgram()));
        // Go through all tabs; Replace All, Rename or Undo could have changed them
        for (SketchCode sc : sketch.getCode()) {
          if (sc.getDocument() != null) {
            try {
              sc.setModified(!sc.getDocumentText().equals(sc.getSavedProgram()));
            } catch (BadLocationException ignore) { }
          }
        }
        repaintHeader();
      }
    }

    protected void updateUndoState() {
      if (undo.canUndo() || compoundEdit != null && compoundEdit.isInProgress()) {