blocksitem.java

java 文件下载器。可自定义

// Decompiled by Jad v1.5.8e2. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://kpdus.tripod.com/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi space 
// Source File Name:   BlocksItem.java

package org.gudy.azureus2.ui.swt.views.tableitems.pieces;

import com.aelitis.azureus.core.diskmanager.cache.*;
import java.util.Arrays;
import org.eclipse.swt.graphics.*;
import org.gudy.azureus2.core3.disk.DiskManager;
import org.gudy.azureus2.core3.disk.DiskManagerPiece;
import org.gudy.azureus2.core3.peer.PEPeerManager;
import org.gudy.azureus2.core3.peer.PEPiece;
import org.gudy.azureus2.plugins.ui.tables.*;
import org.gudy.azureus2.ui.swt.mainwindow.Colors;
import org.gudy.azureus2.ui.swt.mainwindow.SWTThread;
import org.gudy.azureus2.ui.swt.plugins.UISWTGraphic;
import org.gudy.azureus2.ui.swt.pluginsimpl.UISWTGraphicImpl;
import org.gudy.azureus2.ui.swt.views.table.TableCellSWT;
import org.gudy.azureus2.ui.swt.views.table.utils.CoreTableColumn;

public class BlocksItem extends CoreTableColumn
	implements TableCellAddedListener, TableCellRefreshListener, TableCellDisposeListener
{

	private final int COLOR_REQUESTED = 0;
	private final int COLOR_WRITTEN = 1;
	private final int COLOR_DOWNLOADED = 2;
	private final int COLOR_INCACHE = 3;
	public static Color colors[];
	private static CacheFileManagerStats cacheStats = null;

	public BlocksItem()
	{
		super("blocks", "Pieces");
		initializeAsGraphic(-2, 200);
	}

	public void fillTableColumnInfo(TableColumnInfo info)
	{
		info.addCategories(new String[] {
			"progress"
		});
	}

	public void cellAdded(TableCell cell)
	{
		if (cacheStats == null)
			try
			{
				cacheStats = CacheFileManagerFactory.getSingleton().getStats();
			}
			catch (Exception e)
			{
				e.printStackTrace();
			}
		cell.setFillCell(true);
	}

	public void dispose(TableCell cell)
	{
		Image img = ((TableCellSWT)cell).getGraphicSWT();
		if (img != null && !img.isDisposed())
			img.dispose();
	}

	public void refresh(TableCell cell)
	{
		PEPiece pePiece = (PEPiece)cell.getDataSource();
		if (pePiece == null)
		{
			cell.setSortValue(0L);
			dispose(cell);
			cell.setGraphic(null);
			return;
		}
		cell.setSortValue(pePiece.getNbWritten());
		long lNumBlocks = pePiece.getNbBlocks();
		int newWidth = cell.getWidth();
		if (newWidth <= 0)
		{
			dispose(cell);
			cell.setGraphic(null);
			return;
		}
		int newHeight = cell.getHeight();
		int x1 = newWidth - 2;
		int y1 = newHeight - 3;
		if (x1 < 10 || y1 < 3)
		{
			dispose(cell);
			cell.setGraphic(null);
			return;
		}
		Image image = new Image(SWTThread.getInstance().getDisplay(), newWidth, newHeight);
		GC gcImage = new GC(image);
		gcImage.setForeground(Colors.grey);
		gcImage.drawRectangle(0, 0, x1 + 1, y1 + 1);
		int blocksPerPixel = 0;
		int iPixelsPerBlock = 0;
		int pxRes = 0;
		long pxBlockStep = 0L;
		int factor = 4;
		for (; iPixelsPerBlock <= 0; iPixelsPerBlock = (int)((long)(x1 + 1) / (lNumBlocks / (long)blocksPerPixel)))
			blocksPerPixel++;

		pxRes = (int)((long)x1 - (lNumBlocks / (long)blocksPerPixel) * (long)iPixelsPerBlock);
		if (pxRes <= 0)
			pxRes = 1;
		pxBlockStep = (lNumBlocks * (long)factor) / (long)pxRes;
		long addBlocks = (lNumBlocks * (long)factor) / pxBlockStep;
		if (addBlocks * (long)iPixelsPerBlock > (long)pxRes)
			pxBlockStep++;
		org.gudy.azureus2.core3.torrent.TOTorrent torrent = pePiece.getManager().getDiskManager().getTorrent();
		boolean written[] = pePiece.getDMPiece().getWritten();
		boolean piece_written = pePiece.isWritten();
		int drawnWidth = 0;
		int blockStep = 0;
		int pieceNumber = pePiece.getPieceNumber();
		long offsets[] = new long[(int)lNumBlocks];
		long lengths[] = (long[])(long[])offsets.clone();
		Arrays.fill(offsets, (long)pePiece.getManager().getDiskManager().getPieceLength() * (long)pieceNumber);
		for (int i = 0; (long)i < lNumBlocks; i++)
		{
			lengths[i] = pePiece.getBlockSize(i);
			offsets[i] += 16384 * i;
		}

		boolean isCached[] = cacheStats != null ? cacheStats.getBytesInCache(torrent, offsets, lengths) : null;
		for (int i = 0; (long)i < lNumBlocks; i += blocksPerPixel)
		{
			int nextWidth = iPixelsPerBlock;
			blockStep += blocksPerPixel * factor;
			if ((long)blockStep >= pxBlockStep)
			{
				nextWidth += (int)((long)blockStep / pxBlockStep);
				blockStep = (int)((long)blockStep - pxBlockStep);
			}
			if ((long)i >= lNumBlocks - (long)blocksPerPixel)
				nextWidth = x1 - drawnWidth;
			Color color = Colors.white;
			if (written == null && piece_written || written != null && written[i])
				color = colors[1];
			else
			if (pePiece.isDownloaded(i))
				color = colors[2];
			else
			if (pePiece.isRequested(i))
				color = colors[0];
			gcImage.setBackground(color);
			gcImage.fillRectangle(drawnWidth + 1, 1, nextWidth, y1);
			if (isCached[i])
			{
				gcImage.setBackground(colors[3]);
				gcImage.fillRectangle(drawnWidth + 1, 1, nextWidth, 3);
			}
			drawnWidth += nextWidth;
		}

		gcImage.dispose();
		Image oldImage = null;
		org.gudy.azureus2.plugins.ui.Graphic graphic = cell.getGraphic();
		if (graphic instanceof UISWTGraphic)
			oldImage = ((UISWTGraphic)graphic).getImage();
		if (cell instanceof TableCellSWT)
			((TableCellSWT)cell).setGraphic(image);
		else
			cell.setGraphic(new UISWTGraphicImpl(image));
		if (oldImage != null && !oldImage.isDisposed())
			oldImage.dispose();
		gcImage.dispose();
	}

	static 
	{
		colors = (new Color[] {
			Colors.blues[2], Colors.blues[9], Colors.red, Colors.grey
		});
	}
}