package com.jsql.view.swing.text.action;
   
   import javax.swing.*;
   import javax.swing.text.DefaultEditorKit;
   import javax.swing.text.JTextComponent;
   import javax.swing.text.TextAction;
   import java.awt.event.ActionEvent;
   import java.util.Objects;
   
  /**
   * Action to cancel Beep sound when deleting last character.
   * Used on TextField.
   */
  public class SilentDeleteTextAction extends TextAction {
      
      private final transient Action deleteAction;
      
      public SilentDeleteTextAction(String name, Action deleteAction) {
          
          super(name);
          this.deleteAction = deleteAction;
      }
      
      @Override
      public void actionPerformed(ActionEvent e) {
          
          JTextComponent target = this.getTextComponent(e);
          
          if (Objects.nonNull(target) && target.isEditable()) {
              
              var caret = target.getCaret();
              int dot = caret.getDot();
              int mark = caret.getMark();
              
              if (DefaultEditorKit.deletePrevCharAction.equals(this.getValue(Action.NAME))) {
                  // @see javax/swing/text/DefaultEditorKit.java DeletePrevCharAction
                  if (dot == 0 && mark == 0) {
                      return;
                  }
              } else {
                  
                  // @see javax/swing/text/DefaultEditorKit.java DeleteNextCharAction
                  var doc = target.getDocument();
                  
                  if (dot == mark && doc.getLength() == dot) {
                      return;
                  }
              }
          }
          
          this.deleteAction.actionPerformed(e);
      }
  }