/*
    * License : The MIT License
    * Copyright(c) 2019 Olyutorskii
    */
   
   package io.github.olyutorskii.quetexj;
   
   import javax.swing.Action;
   import javax.swing.BoundedRangeModel;
  import javax.swing.DefaultBoundedRangeModel;
  import javax.swing.JTextArea;
  import javax.swing.JToggleButton.ToggleButtonModel;
  import javax.swing.text.DefaultCaret;
  import javax.swing.text.Document;
  import javax.swing.text.PlainDocument;
  
  /**
   * Facade of MVC complexes.
   */
  public class MvcFacade {
  
      private final Document document;
      private final BoundedRangeModel vertRangeModel;
      private final ToggleButtonModel trackSwitchButtonModel;
  
      private final JTextArea textArea;
  
      private final HeightKeeper heightKeeper;
      private final MaxTracker maxTracker;
  
      private final Action clearAction;
  
  
      /**
       * Constructor.
       *
       * <p>PlainDocument, DefaultBoundedRangeModel, and ToggleButtonModel
       * instances are used as default model.
       */
      public MvcFacade() {
          this(
                  new PlainDocument(),
                  new DefaultBoundedRangeModel(),
                  new ToggleButtonModel());
          return;
      }
  
      /**
       * Constructor.
       *
       * @param document text document model
       * @param vertRangeModel vertical scrollbar model
       * @param trackSwitchButtonModel tracking on-off switch button model
       */
      public MvcFacade(
              Document document,
              BoundedRangeModel vertRangeModel,
              ToggleButtonModel trackSwitchButtonModel) {
          super();
  
          this.document = document;
          this.vertRangeModel = vertRangeModel;
          this.trackSwitchButtonModel = trackSwitchButtonModel;
  
          this.textArea = buildTextArea(this.document);
  
          this.heightKeeper =
                  new HeightKeeper(this.textArea, this.vertRangeModel);
          this.maxTracker =
                  new MaxTracker(
                          this.vertRangeModel, this.trackSwitchButtonModel);
  
          this.clearAction = new ClearDocumentAction(this.document);
  
          return;
      }
  
  
      /**
       * Build text area.
       *
       * @param doc document model
       * @return text area
       */
      private static JTextArea buildTextArea(Document doc) {
          JTextArea textComp = new JTextArea();
  
          textComp.setEditable(false);
          textComp.setLineWrap(true);
  
          DefaultCaret caret = new DefaultCaret();
          caret.setUpdatePolicy(DefaultCaret.NEVER_UPDATE);
          textComp.setCaret(caret);
  
          textComp.setDocument(doc);
  
          return textComp;
      }
  
 
     /**
      * Return document model.
      *
      * @return document model
      */
     public Document getDocument() {
         return this.document;
     }
 
     /**
      * Return text area view.
      *
      * @return text area view
      */
     public JTextArea getTextArea() {
         return this.textArea;
     }
 
     /**
      * Return vertical BoundedRangeModel.
      *
      * @return vertical BoundedRangeModel
      */
     public BoundedRangeModel getVerticalBoundedRangeModel() {
         return this.vertRangeModel;
     }
 
     /**
      * Return HeightKeeper instance.
      *
      * @return HeightKeeper instance
      */
     public HeightKeeper getHeightKeeper() {
         return this.heightKeeper;
     }
 
     /**
      * Return MaxTracker instance.
      *
      * @return MaxTracker instance
      */
     public MaxTracker getMaxTracker() {
         return this.maxTracker;
     }
 
     /**
      * Return tracking on-off switch ButtonModel.
      *
      * @return tracking on-off switch ButtonModel
      */
     public ToggleButtonModel getTrackSwitchButtonModel() {
         return this.trackSwitchButtonModel;
     }
 
     /**
      * Return clear document Action.
      *
      * @return clear document Action
      */
     public Action getClearAction() {
         return this.clearAction;
     }
 
 }