package bluej.stride.operations;

import java.util.Collections;
import java.util.List;

import bluej.stride.slots.EditableSlot.SortedMenuItem;
import javafx.application.Platform;
import javafx.scene.control.CustomMenuItem;
import bluej.stride.generic.Frame;
import bluej.stride.generic.InteractionManager;
import bluej.stride.generic.RecallableFocus;
import threadchecker.OnThread;
import threadchecker.Tag;

import javafx.scene.control.MenuItem;
import javafx.scene.input.KeyCombination;

public abstract class FrameOperation
extends AbstractOperation{     
   private KeyCombination shortcut;

   
   public FrameOperation(InteractionManager editor, String identifier, Combine combine)
   {
      this(editor, identifier, combine, null);     
      }

   
   public FrameOperation(InteractionManager editor, String identifier, Combine combine, KeyCombination shortcut)
   {
      super(editor, identifier, combine);
       
      this.shortcut = shortcut;     
      }

   @OnThread(Tag.FXPlatform)
   
   protected void enablePreview()
{    
}

@OnThread(Tag.FXPlatform)
   
protected void disablePreview()
{ 
}

@OnThread(Tag.FXPlatform)
   
public void onMenuShowing(CustomMenuItem item)
{ 
}

@OnThread(Tag.FXPlatform)
   
public void onMenuHidden(CustomMenuItem item)
{ 
}

@OnThread(Tag.FXPlatform)
   
public final void activate(Frame frame)
   {
   
   activate(Collections.singletonList(frame));     
   }

@OnThread(Tag.FXPlatform)
   
public final void activate(Frame frame, RecallableFocus focus)
   {
   activate(Collections.singletonList(frame), focus);     
   }

@OnThread(Tag.FXPlatform)
   
public final void activate(List<Frame> frames)
   {
   Frame first = editor.getSelection().getSelected().isEmpty() ? null : editor.getSelection().getSelected().get(0);
   RecallableFocus focus = first == null ? null : first.getCursorBefore();
   activate(frames, focus);     
   }

@OnThread(Tag.FXPlatform)
   
public final void activate(List<Frame> frames, RecallableFocus focus)
   {
   editor.beginRecordingState(focus);
   
   disablePreview();
   execute(frames);
   editor.endRecordingState(focus);     
   }

   



| Executes the class operation on targeted frames
|
| @param frames targeted frames that will receive the operation
|
@OnThread(Tag.FXPlatform)
   
protected abstract void execute(List<Frame> frames);

   
public boolean onlyOnContextMenu()
   {        
   return false;     
   }

   
public SortedMenuItem getMenuItem(boolean contextMenu)
   {        
   MenuItem item;
   if (contextMenu)
       {
      CustomMenuItem customItem = initializeCustomItem();

      customItem.getContent().setOnMouseEntered(e -> enablePreview());
      customItem.getContent().setOnMouseExited(e -> disablePreview());

           
      item = customItem;         
      }
       

   else
       {
      item = initializeNormalItem();         
      }

   item.setOnAction(e -> {
   activate(editor.getSelection().getSelected());
   e.consume();         
   });
if (shortcut != null) {
   item.setAccelerator(shortcut);         
   }

return getLabels().get(0).getOrder().item(item);     
}

   
public KeyCombination getShortcut()
   {        
   return shortcut;     
   } 
}