/*
 * Created on 17 juil. 2003
 *
 * Copyright (C) 2004, 2005, 2006 Aelitis SAS, All rights Reserved
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details ( see the LICENSE file ).
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * AELITIS, SAS au capital de 46,603.30 euros,
 * 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France.
 */
package org.gudy.azureus2.ui.swt.views;


import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.*;
import org.gudy.azureus2.core3.config.COConfigurationManager;
import org.gudy.azureus2.core3.config.ParameterListener;
import org.gudy.azureus2.core3.disk.DiskManagerFileInfo;
import org.gudy.azureus2.core3.download.DownloadManager;
import org.gudy.azureus2.core3.download.DownloadManagerState;
import org.gudy.azureus2.core3.download.DownloadManagerStateAttributeListener;
import org.gudy.azureus2.core3.internat.MessageText;
import org.gudy.azureus2.core3.util.FileUtil;
import org.gudy.azureus2.plugins.ui.tables.TableManager;
import org.gudy.azureus2.ui.swt.MessageBoxWindow;
import org.gudy.azureus2.ui.swt.Messages;
import org.gudy.azureus2.ui.swt.SimpleTextEntryWindow;
import org.gudy.azureus2.ui.swt.Utils;
import org.gudy.azureus2.ui.swt.views.file.FileInfoView;
import org.gudy.azureus2.ui.swt.views.table.TableViewSWT;
import org.gudy.azureus2.ui.swt.views.table.TableViewSWTMenuFillListener;
import org.gudy.azureus2.ui.swt.views.table.impl.TableViewSWTImpl;
import org.gudy.azureus2.ui.swt.views.table.impl.TableViewTab;
import org.gudy.azureus2.ui.swt.views.tableitems.files.*;
import org.gudy.azureus2.ui.swt.views.utils.ManagerUtils;

import com.aelitis.azureus.core.AzureusCoreOperation;
import com.aelitis.azureus.core.AzureusCoreOperationTask;
import com.aelitis.azureus.ui.common.table.*;

/**
 * @author Olivier
 * @author TuxPaper
 *         2004/Apr/23: extends TableView instead of IAbstractView
 */
public class FilesView
	extends TableViewTab
	implements TableDataSourceChangedListener, TableSelectionListener,
	TableViewSWTMenuFillListener, TableRefreshListener, DownloadManagerStateAttributeListener,
	TableLifeCycleListener
{
	boolean refreshing = false;

  private static final TableColumnCore[] basicItems = {
    new NameItem(),
    new PathItem(),
    new SizeItem(),
    new DoneItem(),
    new PercentItem(),
    new FirstPieceItem(),
    new PieceCountItem(),
    new RemainingPiecesItem(),
    new ProgressGraphItem(),
    new ModeItem(),
    new PriorityItem(),
    new StorageTypeItem(),
    new FileExtensionItem(), 
  };
  
  private DownloadManager manager = null;
  
  public static boolean show_full_path;

  static{
	  COConfigurationManager.addAndFireParameterListener(
			  "FilesView.show.full.path",
			  new ParameterListener()
			  {
				  public void 
				  parameterChanged(
					String parameterName) 
				  {
					  show_full_path = COConfigurationManager.getBooleanParameter( "FilesView.show.full.path" );
				  }
			  });
  }
  
  private MenuItem path_item;

  private TableViewSWT tv;
  

  /**
   * Initialize 
   */
	public FilesView() {
		tv = new TableViewSWTImpl(TableManager.TABLE_TORRENT_FILES, "FilesView",
				basicItems, "firstpiece", SWT.MULTI | SWT.FULL_SELECTION | SWT.VIRTUAL);
		setTableView(tv);
		tv.setRowDefaultIconSize(new Point(16, 16));
		tv.setEnableTabViews(true);
		tv.setCoreTabViews(new IView[] { new FileInfoView()
		});

		tv.addTableDataSourceChangedListener(this, true);
		tv.addRefreshListener(this, true);
		tv.addSelectionListener(this, false);
		tv.addMenuFillListener(this);
		tv.addLifeCycleListener(this);
	}

  
  // @see com.aelitis.azureus.ui.common.table.TableDataSourceChangedListener#tableDataSourceChanged(java.lang.Object)
  public void tableDataSourceChanged(Object newDataSource) {
	  DownloadManager old_manager = manager;
		if (newDataSource == null)
			manager = null;
		else if (newDataSource instanceof Object[])
			manager = (DownloadManager)((Object[])newDataSource)[0];
		else
			manager = (DownloadManager)newDataSource;
		
		if (old_manager != null) {
			old_manager.getDownloadState().removeListener(this, DownloadManagerState.AT_FILE_LINKS, DownloadManagerStateAttributeListener.WRITTEN);
		}
		if (manager != null) {
			manager.getDownloadState().addListener(this, DownloadManagerState.AT_FILE_LINKS, DownloadManagerStateAttributeListener.WRITTEN);
		}

		tv.removeAllTableRows();
	}
	
	// @see com.aelitis.azureus.ui.common.table.TableSelectionListener#deselected(com.aelitis.azureus.ui.common.table.TableRowCore[])
	public void deselected(TableRowCore[] rows) {
	}

	// @see com.aelitis.azureus.ui.common.table.TableSelectionListener#focusChanged(com.aelitis.azureus.ui.common.table.TableRowCore)
	public void focusChanged(TableRowCore focus) {
	}

	// @see com.aelitis.azureus.ui.common.table.TableSelectionListener#selected(com.aelitis.azureus.ui.common.table.TableRowCore[])
	public void selected(TableRowCore[] rows) {
	}

	// @see com.aelitis.azureus.ui.common.table.TableSelectionListener#defaultSelected(com.aelitis.azureus.ui.common.table.TableRowCore[])
	public void defaultSelected(TableRowCore[] rows, int stateMask) {
		DiskManagerFileInfo fileInfo = (DiskManagerFileInfo) tv.getFirstSelectedDataSource();
		if (fileInfo != null
				&& fileInfo.getAccessMode() == DiskManagerFileInfo.READ)
			Utils.launch(fileInfo.getFile(true).toString());
	}

	// @see org.gudy.azureus2.ui.swt.views.TableViewSWTMenuFillListener#fillMenu(org.eclipse.swt.widgets.Menu)
	public void fillMenu(final Menu menu) {
		Shell shell = menu.getShell();
		Object[] data_sources = tv.getSelectedDataSources();
		boolean hasSelection = (data_sources.length > 0);

    final MenuItem itemOpen = new MenuItem(menu, SWT.PUSH);
    Messages.setLanguageText(itemOpen, "FilesView.menu.open");
    Utils.setMenuItemImage(itemOpen, "run");
    // Invoke open on enter, double click
    menu.setDefaultItem(itemOpen);

	// Explore  (Copied from MyTorrentsView)
	final boolean use_open_containing_folder = COConfigurationManager.getBooleanParameter("MyTorrentsView.menu.show_parent_folder_enabled");
	final MenuItem itemExplore = new MenuItem(menu, SWT.PUSH);
	Messages.setLanguageText(itemExplore, "MyTorrentsView.menu." + (use_open_containing_folder ? "open_parent_folder" : "explore"));
	itemExplore.addListener(SWT.Selection, new Listener() {
		public void handleEvent(Event event) {
		    Object[] dataSources = tv.getSelectedDataSources();
		    for (int i = dataSources.length - 1; i >= 0; i--) {
		    	DiskManagerFileInfo info = (DiskManagerFileInfo)dataSources[i];
		    	if (info != null) {
		    		File this_file = info.getFile(true);
		    		File parent_file = (use_open_containing_folder) ? this_file.getParentFile() : null;
		    		ManagerUtils.open((parent_file == null) ? this_file : parent_file);
		    	}
		    }
		}
	});
	itemExplore.setEnabled(hasSelection);

	MenuItem itemRenameOrRetarget = null, itemRename = null, itemRetarget = null;

	itemRenameOrRetarget = new MenuItem(menu, SWT.PUSH);
	Messages.setLanguageText(itemRenameOrRetarget, "FilesView.menu.rename");
	itemRenameOrRetarget.setData("rename", Boolean.valueOf(true));
	itemRenameOrRetarget.setData("retarget", Boolean.valueOf(true));
	
	itemRename = new MenuItem(menu, SWT.PUSH);
	itemRetarget = new MenuItem(menu, SWT.PUSH);
	Messages.setLanguageText(itemRename, "FilesView.menu.rename_only");
	Messages.setLanguageText(itemRetarget, "FilesView.menu.retarget");
	
	itemRename.setData("rename", Boolean.valueOf(true));
	itemRename.setData("retarget", Boolean.valueOf(false));
	itemRetarget.setData("rename", Boolean.valueOf(false));
	itemRetarget.setData("retarget", Boolean.valueOf(true));
		
    final MenuItem itemPriority = new MenuItem(menu, SWT.CASCADE);
    Messages.setLanguageText(itemPriority, "FilesView.menu.setpriority"); //$NON-NLS-1$
    
    final Menu menuPriority = new Menu(shell, SWT.DROP_DOWN);
    itemPriority.setMenu(menuPriority);
    
    final MenuItem itemHigh = new MenuItem(menuPriority, SWT.CASCADE);
    itemHigh.setData("Priority", new Integer(0));
    Messages.setLanguageText(itemHigh, "FilesView.menu.setpriority.high"); //$NON-NLS-1$
    
    final MenuItem itemLow = new MenuItem(menuPriority, SWT.CASCADE);
    itemLow.setData("Priority", new Integer(1));
    Messages.setLanguageText(itemLow, "FilesView.menu.setpriority.normal"); //$NON-NLS-1$
    
    final MenuItem itemSkipped = new MenuItem(menuPriority, SWT.CASCADE);
    itemSkipped.setData("Priority", new Integer(2));
    Messages.setLanguageText(itemSkipped, "FilesView.menu.setpriority.skipped"); //$NON-NLS-1$

    final MenuItem itemDelete = new MenuItem(menuPriority, SWT.CASCADE);
    itemDelete.setData("Priority", new Integer(3));
    Messages.setLanguageText(itemDelete, "wizard.multitracker.delete");	// lazy but we're near release

    new MenuItem(menu, SWT.SEPARATOR);

	if (!hasSelection) {
		itemOpen.setEnabled(false);
		itemPriority.setEnabled(false);
		itemRenameOrRetarget.setEnabled(false);
		itemRename.setEnabled(false);
		itemRetarget.setEnabled(false);
		return;
	}

	boolean open 				= true;
	boolean all_compact 		= true;
	boolean	all_skipped			= true;
	boolean	all_priority		= true;
	boolean	all_not_priority	= true;
		
	DiskManagerFileInfo[] dmi_array = new DiskManagerFileInfo[data_sources.length];
	
	System.arraycopy(data_sources, 0, dmi_array, 0, data_sources.length);
	
	int[] storage_types = manager.getStorageType(dmi_array);
		
	for (int i = 0; i < dmi_array.length; i++) {

		DiskManagerFileInfo file_info = dmi_array[i];

		if (open && file_info.getAccessMode() != DiskManagerFileInfo.READ) {

			open = false;
		}

		if (all_compact && storage_types[i] != DiskManagerFileInfo.ST_COMPACT) {
			all_compact = false;
		}

		if (all_skipped || all_priority || all_not_priority) {
			if ( file_info.isSkipped()){
				all_priority		= false;
				all_not_priority	= false;
			}else{
				all_skipped = false;

				// Only do this check if we need to.
				if (all_not_priority || all_priority) {
					if (file_info.isPriority()){
						all_not_priority = false;
					}else{
						all_priority = false;
					}
				}
			}
		}
	}

	// we can only open files if they are read-only

	itemOpen.setEnabled(open);

	// can't rename files for non-persistent downloads (e.g. shares) as these
	// are managed "externally"

	itemRenameOrRetarget.setEnabled(manager.isPersistent());
	itemRename.setEnabled(manager.isPersistent());
	itemRetarget.setEnabled(manager.isPersistent());

	itemSkipped.setEnabled( !all_skipped );

	itemHigh.setEnabled( !all_priority );

	itemLow.setEnabled( !all_not_priority );

	itemDelete.setEnabled( !all_compact );

	itemOpen.addListener(SWT.Selection, new TableSelectedRowsListener(tv) {
		public void run(TableRowCore row) {
			DiskManagerFileInfo fileInfo = (DiskManagerFileInfo)row.getDataSource(true);
			if (fileInfo.getAccessMode() == DiskManagerFileInfo.READ) {
				Utils.launch(fileInfo.getFile(true).toString());
			}
		}
	});
    
    Listener rename_listener = new Listener() {
    	public void handleEvent(Event event) {
    		boolean rename_it = ((Boolean)event.widget.getData("rename")).booleanValue();
    		boolean retarget_it = ((Boolean)event.widget.getData("retarget")).booleanValue();
    		rename(tv.getSelectedRows(), rename_it, retarget_it);
    	}
    };
    
   	itemRenameOrRetarget.addListener(SWT.Selection, rename_listener);
   	itemRename.addListener(SWT.Selection, rename_listener);
   	itemRetarget.addListener(SWT.Selection, rename_listener);
    
    Listener priorityListener = new Listener() {
			public void handleEvent(Event event) {
				changePriority(((Integer) event.widget.getData("Priority")).intValue(),
						tv.getSelectedRows());
			}
    };

    itemHigh.addListener(SWT.Selection, priorityListener); 
    itemLow.addListener(SWT.Selection, priorityListener);
    itemSkipped.addListener(SWT.Selection, priorityListener); 
    itemDelete.addListener(SWT.Selection, priorityListener);
	}

	private String askForRenameFilename(DiskManagerFileInfo fileInfo) {
		SimpleTextEntryWindow dialog = new SimpleTextEntryWindow(Display.getDefault());
		dialog.setTitle("FilesView.rename.filename.title");
		dialog.setMessage("FilesView.rename.filename.text");
		dialog.setPreenteredText(fileInfo.getFile(true).getName(), false); // false -> it's not "suggested", it's a previous value
		dialog.allowEmptyInput(false);
		dialog.prompt();
		if (!dialog.hasSubmittedInput()) {return null;}
		return dialog.getSubmittedInput();
	}
	
	private String askForRetargetedFilename(DiskManagerFileInfo fileInfo) {
		FileDialog fDialog = new FileDialog(Utils.findAnyShell(), SWT.SYSTEM_MODAL | SWT.SAVE);  
		File existing_file = fileInfo.getFile(true);
		fDialog.setFilterPath(existing_file.getParent());
		fDialog.setFileName(existing_file.getName());
		fDialog.setText(MessageText.getString("FilesView.rename.choose.path"));
		return fDialog.open();
	}
	
	private String askForSaveDirectory(DiskManagerFileInfo fileInfo) {
		DirectoryDialog dDialog = new DirectoryDialog(Utils.findAnyShell(), SWT.SYSTEM_MODAL | SWT.SAVE);
		File current_dir = fileInfo.getFile(true).getParentFile();
		dDialog.setFilterPath(current_dir.getPath());
		dDialog.setText(MessageText.getString("FilesView.rename.choose.path.dir"));
		return dDialog.open();
	}
	
	private boolean askCanOverwrite(File file) {
		return MessageBoxWindow.open( 
				"FilesView.messagebox.rename.id",
				SWT.OK | SWT.CANCEL,
				SWT.OK, true,
				Display.getDefault(), 
				MessageBoxWindow.ICON_WARNING,
				MessageText.getString( "FilesView.rename.confirm.delete.title" ),
				MessageText.getString( "FilesView.rename.confirm.delete.text", new String[]{ file.toString()})) == SWT.OK;
	}
	
	// same code is used in tableitems.files.NameItem
	private void moveFile(final DiskManagerFileInfo fileInfo, final File target) {

		// this behaviour should be put further down in the core but I'd rather not
		// do so close to release :(
		final boolean[] result = { false };

		is_changing_links = true;
		FileUtil.runAsTask(new AzureusCoreOperationTask() {
			public void run(AzureusCoreOperation operation) {
					result[0] = fileInfo.setLink(target);
				}
			}
		);
		is_changing_links = false;

		if (!result[0]){
			MessageBox mb = new MessageBox(Utils.findAnyShell(), SWT.ICON_ERROR | SWT.OK);
			mb.setText(MessageText.getString("FilesView.rename.failed.title"));
			mb.setMessage(MessageText.getString("FilesView.rename.failed.text"));
			mb.open();	    					
		}

	}
  
	protected void rename(TableRowCore[] rows, boolean rename_it, boolean retarget_it) {
	 	if (manager == null) {return;}
	 	if (rows.length == 0) {return;}
	 	
	 	String save_dir = null;
	 	if (!rename_it && retarget_it) {
	 		save_dir = askForSaveDirectory((DiskManagerFileInfo)rows[0].getDataSource(true));
	 		if (save_dir == null) {return;}
	 	}
	 	
		boolean	paused = false;
		try {
			for (int i=0; i<rows.length; i++) {
				TableRowCore row = rows[i];
				DiskManagerFileInfo fileInfo = (DiskManagerFileInfo)rows[i].getDataSource(true);
				File existing_file = fileInfo.getFile(true);
				File f_target = null;
				if (rename_it && retarget_it) {
					String s_target = askForRetargetedFilename(fileInfo);
					if (s_target != null)
						f_target = new File(s_target);
				}
				else if (rename_it) {
					String s_target = askForRenameFilename(fileInfo);
					if (s_target != null)
						f_target = new File(existing_file.getParentFile(), s_target);
				}
				else {
					// Parent directory has changed.
					f_target = new File(save_dir, existing_file.getName());
				}
				
				// So are we doing a rename?
				// If the user has decided against it - abort the op.
				if (f_target == null) {return;}
			
			    if (!paused) {paused = manager.pause();}
			    
    			if (f_target.exists()){
    				
    				// Nothing to do.
    				if (f_target.equals(existing_file))
    					continue;
    					
    				// A rewrite will occur, so we need to ask the user's permission.
    				else if (existing_file.exists() && !askCanOverwrite(existing_file))
    					continue;
    				
    				// If we reach here, then it means we are doing a real move, but there is
    				// no existing file.
    			}
    					
    			moveFile(fileInfo, f_target);
    			row.invalidate();
			}
		}
		finally {
			if (paused){manager.resume();}
		}
	}
	
	
  private void
  changePriority(
	  int				type ,
	  TableRowCore[]	rows )
  {
	  	if ( manager == null){
	  		
	  		return;
	  	}
  				
	  	boolean paused = false;
		try{
            DiskManagerFileInfo[] file_infos = new DiskManagerFileInfo[rows.length];
     	 	for (int i=0; i<rows.length; i++) {
     	 		file_infos[i] = (DiskManagerFileInfo)rows[i].getDataSource(true);
     	 		if (type == 0 || type == 1) {
     	 			file_infos[i].setPriority(type==0);
				}
     	 	}
     	 	boolean skipped = (type == 2 || type == 3);
     	 	boolean delete_action = (type == 3);
     	 	paused = setSkipped(file_infos, skipped, delete_action);
		}finally{
			
			if ( paused ){
			
				manager.resume();
			}
		}
  }
  
  // Returns true if it was paused here.
  private boolean
  setSkipped(
	 DiskManagerFileInfo[]	infos,
	 boolean				skipped,
	 boolean				delete_action)
  {
		// if we're not managing the download then don't do anything other than
		// change the file's priority
	
	if (!manager.isPersistent()){
		for (int i=0; i<infos.length; i++) {
			infos[i].setSkipped(skipped);
		}
		return false;
	}
	
	int[] existing_storage_types = manager.getStorageType(infos);
	int nbFiles = manager.getDiskManagerFileInfoSet().nbFiles();
	boolean[] setLinear = new boolean[nbFiles];
	boolean[] setCompact = new boolean[nbFiles];
	int compactCount = 0;
	int linearCount = 0;


	if(infos.length > 1)
	{
		
	}
	// This should hopefully reduce the number of "exists" checks.
	File save_location = manager.getAbsoluteSaveLocation();
	boolean root_exists = save_location.isDirectory() || (infos.length <= 1 && save_location.exists());
	
	boolean type_has_been_changed = false;
	boolean requires_pausing = false;

	for (int i=0; i<infos.length; i++) {
		int existing_storage_type = existing_storage_types[i];  
		int new_storage_type = DiskManagerFileInfo.ST_LINEAR;
		if (skipped) {

			// Check to see if the file exists, but try to avoid doing an
			// actual disk check if possible.
			File existing_file = infos[i].getFile(true);
			
			// Avoid performing existing_file.exists if we know that it is meant
			// to reside in the default save location and that location does not
			// exist.
			boolean perform_check;
			if (root_exists) {perform_check = true;}
			else if (FileUtil.isAncestorOf(save_location, existing_file)) {perform_check = false;}
			else {perform_check = true;}
						
			if (perform_check && existing_file.exists()) {
				if (delete_action) {
					boolean wants_to_delete = MessageBoxWindow.open( 
							"FilesView.messagebox.delete.id",
							SWT.OK | SWT.CANCEL,
							SWT.OK, true,
							Display.getDefault(), 
							MessageBoxWindow.ICON_WARNING,
							MessageText.getString( "FilesView.rename.confirm.delete.title" ),
							MessageText.getString( "FilesView.rename.confirm.delete.text", new String[]{ existing_file.toString()})) == SWT.OK;
					
					if (wants_to_delete) {new_storage_type = DiskManagerFileInfo.ST_COMPACT;}
				}
			}
			// File does not exist.
			else {new_storage_type = DiskManagerFileInfo.ST_COMPACT;}			
		}
		
		boolean has_changed = existing_storage_type != new_storage_type;
		type_has_been_changed |= has_changed;
		requires_pausing |= (has_changed && new_storage_type == DiskManagerFileInfo.ST_COMPACT);
		
		type_has_been_changed = 
			existing_storage_type != new_storage_type;
		
		if(new_storage_type == DiskManagerFileInfo.ST_COMPACT)
		{
			setCompact[infos[i].getIndex()] = true;
			compactCount++;
		} else
		{
			setLinear[infos[i].getIndex()] = true;
			linearCount++;			
		}
	}
	
	boolean ok = true;
	boolean paused = false;
	if (type_has_been_changed) {
		if (requires_pausing) paused = manager.pause();
		if(linearCount > 0)
			ok &= Arrays.equals(setLinear, manager.getDiskManagerFileInfoSet().setStorageTypes(setLinear, DiskManagerFileInfo.ST_LINEAR));
		if(compactCount > 0)
			ok &= Arrays.equals(setCompact, manager.getDiskManagerFileInfoSet().setStorageTypes(setCompact, DiskManagerFileInfo.ST_COMPACT));
	}	
	
	if (ok) {
		for (int i=0; i<infos.length; i++) {
			infos[i].setSkipped(skipped);
		}
	}
	
	return paused;
  }

  // @see com.aelitis.azureus.ui.common.table.TableRefreshListener#tableRefresh()
  private boolean force_refresh = false;
  public void tableRefresh() {
  	if (refreshing)
  		return;

  	try {
	  	refreshing = true;
	    if (tv.isDisposed())
	      return;
	
	    DiskManagerFileInfo files[] = getFileInfo();

	    if (files != null && (this.force_refresh || !doAllExist(files))) {
	    	this.force_refresh = false;

	    	Object[] datasources = tv.getDataSources();
	    	if(datasources.length == files.length)
	    	{
	    		// check if we actually have to replace anything
	    		ArrayList toAdd = new ArrayList(Arrays.asList(files));
		    	ArrayList toRemove = new ArrayList();
		    	for(int i = 0;i < datasources.length;i++)
		    	{
		    		DiskManagerFileInfo info = (DiskManagerFileInfo)datasources[i];
		    		
		    		if(files[info.getIndex()] == info)
		    			toAdd.set(info.getIndex(), null);
		    		else
		    			toRemove.add(info);
		    	}
		    	tv.removeDataSources(toRemove.toArray());
		    	tv.addDataSources(toAdd.toArray());
		    	((TableViewSWTImpl)tv).tableInvalidate();
	    	} else
	    	{
		    	tv.removeAllTableRows();
	    		
			    Object filesCopy[] = new Object[files.length]; 
			    System.arraycopy(files, 0, filesCopy, 0, files.length);

			    tv.addDataSources(filesCopy);
	    	}

		    tv.processDataSourceQueue();
	    }
  	} finally {
  		refreshing = false;
  	}
  }
  
  /**
	 * @param files
	 * @return
	 *
	 * @since 3.0.0.7
	 */
	private boolean doAllExist(DiskManagerFileInfo[] files) {
		for (int i = 0; i < files.length; i++) {
			DiskManagerFileInfo fileinfo = files[i];

			// We can't just use tv.dataSourceExists(), since it does a .equals()
			// comparison, and we want a reference comparison
			TableRowCore row = tv.getRow(fileinfo);
			if (row == null) {
				return false;
			}
			// reference comparison
			if (row.getDataSource(true) != fileinfo) {
				return false;
			}
		}
		return true;
	}

  /* SubMenu for column specific tasks.
   */
  public void addThisColumnSubMenu(String sColumnName, Menu menuThisColumn) {

    if (sColumnName.equals("path")) {
      path_item = new MenuItem( menuThisColumn, SWT.CHECK );
      
      menuThisColumn.addListener( SWT.Show, new Listener() {
        public void handleEvent(Event e) {
          path_item.setSelection( show_full_path );
        }
      });
      
      Messages.setLanguageText(path_item, "FilesView.fullpath");
      
      path_item.addListener(SWT.Selection, new Listener() {
        public void handleEvent(Event e) {
          show_full_path = path_item.getSelection();
          tv.columnInvalidate("path");
          tv.refreshTable(false);
          COConfigurationManager.setParameter( "FilesView.show.full.path", show_full_path );
        }
      });
      
    }
  }
  
  
  private DiskManagerFileInfo[]
  getFileInfo()
  {
  	if (manager == null)
  		return null;
	  return( manager.getDiskManagerFileInfo());
  }
  
  // Used to notify us of when we need to refresh - normally for external changes to the
  // file links.
  private boolean is_changing_links = false;
  public void attributeEventOccurred(DownloadManager dm, String attribute_name, int event_type) {
	  if (is_changing_links) {return;}
	  this.force_refresh = true;
  }
  
  public void tableViewInitialized() {}
  public void tableViewDestroyed() {
	  if (manager != null) {
		  manager.getDownloadState().removeListener(this, DownloadManagerState.AT_FILE_LINKS, DownloadManagerStateAttributeListener.WRITTEN);
	  }
  }


	// @see com.aelitis.azureus.ui.common.table.TableSelectionListener#mouseEnter(com.aelitis.azureus.ui.common.table.TableRowCore)
	public void mouseEnter(TableRowCore row) {
	}

	// @see com.aelitis.azureus.ui.common.table.TableSelectionListener#mouseExit(com.aelitis.azureus.ui.common.table.TableRowCore)
	public void mouseExit(TableRowCore row) {
	}
}
