package com.jsql.view.swing.text.action;
   
   import com.jsql.util.LogLevelUtil;
   import org.apache.logging.log4j.LogManager;
   import org.apache.logging.log4j.Logger;
   
   import javax.swing.text.BadLocationException;
   import javax.swing.text.Document;
   import javax.swing.text.JTextComponent;
  import javax.swing.text.TextAction;
  import java.awt.event.ActionEvent;
  
  /**
   * Action to cancel Beep sound when deleting last character.
   * Used on TextPane and TextArea.
   */
  public abstract class AbstractCharAction extends TextAction {
      
      private static final Logger LOGGER = LogManager.getRootLogger();
  
      /**
       * Create this object with the appropriate identifier.
       */
      protected AbstractCharAction(String deleteAction) {
          super(deleteAction);
      }
  
      protected abstract void delete(Document doc, int dot) throws BadLocationException;
  
      /**
       * The operation to perform when this action is triggered.
       */
      @Override
      public void actionPerformed(ActionEvent event) {
          
          JTextComponent target = this.getTextComponent(event);
  
          if (target == null || !target.isEditable()) {
              return;
          }
          
          try {
              var doc = target.getDocument();
              var caret = target.getCaret();
              int dot = caret.getDot();
              int mark = caret.getMark();
              
              if (dot != mark) {
                  doc.remove(Math.min(dot, mark), Math.abs(dot - mark));
              } else {
                  this.delete(doc, dot);
              }
          } catch (BadLocationException e) {
              LOGGER.log(LogLevelUtil.CONSOLE_JAVA, e, e);
          }
      }
  }