peerinfoview.java

这是一个基于java编写的torrent的P2P源码

/*
 * File    : PeerInfoView.java
 * Created : Oct 2, 2005
 * By      : TuxPaper
 *
 * Copyright (C) 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.peer;

import java.io.InputStream;
import java.util.Arrays;
import java.util.Locale;

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.*;

import org.gudy.azureus2.core3.config.COConfigurationManager;
import org.gudy.azureus2.core3.disk.DiskManager;
import org.gudy.azureus2.core3.disk.DiskManagerPiece;
import org.gudy.azureus2.core3.logging.*;
import org.gudy.azureus2.core3.peer.PEPeer;
import org.gudy.azureus2.core3.peer.PEPeerManager;
import org.gudy.azureus2.core3.util.AERunnable;
import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.core3.util.DisplayFormatters;
import org.gudy.azureus2.plugins.Plugin;
import org.gudy.azureus2.plugins.PluginInterface;
import org.gudy.azureus2.pluginsimpl.local.PluginInitializer;
import org.gudy.azureus2.ui.swt.components.Legend;
import org.gudy.azureus2.ui.swt.debug.ObfusticateImage;
import org.gudy.azureus2.ui.swt.debug.UIDebugGenerator;
import org.gudy.azureus2.ui.swt.mainwindow.Colors;
import org.gudy.azureus2.ui.swt.views.AbstractIView;

import com.aelitis.azureus.core.peermanager.piecepicker.util.BitFlags;

/**
 * Piece Map subview for Peers View.
 * Testing bed for SubView stuff.
 * 
 * @author TuxPaper
 * @created 2005/10/02
 * 
 * @todo on paint, paint cached image instead of recalc
 */
public class PeerInfoView extends AbstractIView implements ObfusticateImage {
	private final static int BLOCK_FILLSIZE = 14;

	private final static int BLOCK_SPACING = 2;

	private final static int BLOCK_SIZE = BLOCK_FILLSIZE + BLOCK_SPACING;

	private final static int BLOCKCOLOR_AVAIL_HAVE = 0;

	private final static int BLOCKCOLOR_AVAIL_NOHAVE = 1;

	private final static int BLOCKCOLOR_NOAVAIL_HAVE = 2;

	private final static int BLOCKCOLOR_NOAVAIL_NOHAVE = 3;

	private final static int BLOCKCOLOR_TRANSFER = 4;

	private final static int BLOCKCOLOR_NEXT = 5;

	private final static int BLOCKCOLOR_AVAILCOUNT = 6;

	private Composite peerInfoComposite;

	private ScrolledComposite sc;

	protected Canvas peerInfoCanvas;

	private Color[] blockColors;

	private Label topLabel;

	private Label imageLabel;

	// More delay for this view because of high workload
	private int graphicsUpdate = COConfigurationManager
			.getIntParameter("Graphics Update") * 2;

	private int loopFactor = 0;

	private PEPeer peer;

	private Plugin countryLocator = null;

	private String sCountryImagesDir;

	private Font font = null;

	Image img = null;

	/**
	 * Initialize
	 *
	 */
	public PeerInfoView() {
		blockColors = new Color[] { Colors.blues[Colors.BLUES_DARKEST],
				Colors.blues[Colors.BLUES_MIDLIGHT], Colors.fadedGreen, Colors.white,
				Colors.red, Colors.fadedRed, Colors.black };

		// Pull in Country Information if the plugin exists
		/**
		 * If this view was a real plugin view, we could attach the CountryLocator.jar
		 * to our project, cast countryLocator as CountryLocator (instead of Plugin),
		 * and then directly call the functions.
		 * 
		 * Since we are in core, and we don't want to add a dependency on the
		 * CountryLocator.jar, we invoke the methods via the Class object.
		 */
		try {
			PluginInterface pi = PluginInitializer.getDefaultInterface()
					.getPluginManager().getPluginInterfaceByID("CountryLocator");
			if (pi != null) {
				countryLocator = pi.getPlugin();
				if (!pi.isOperational()
						|| pi.getUtilities().compareVersions(pi.getPluginVersion(), "1.6") < 0)
					countryLocator = null;

				if (countryLocator != null) {
					sCountryImagesDir = (String) countryLocator.getClass().getMethod(
							"getImageLocation", new Class[] { Integer.TYPE }).invoke(
							countryLocator, new Object[] { new Integer(0) });
				}
			}
		} catch (Throwable t) {

		}
	}

	public void dataSourceChanged(Object newDataSource) {
		if (newDataSource == null)
			peer = null;
		else if (newDataSource instanceof Object[])
			peer = (PEPeer) ((Object[]) newDataSource)[0];
		else
			peer = (PEPeer) newDataSource;

		fillPeerInfoSection();
	}

	/* (non-Javadoc)
	 * @see org.gudy.azureus2.ui.swt.views.AbstractIView#getData()
	 */
	public String getData() {
		return "PeersView.BlockView.title";
	}

	/* (non-Javadoc)
	 * @see org.gudy.azureus2.ui.swt.views.AbstractIView#initialize(org.eclipse.swt.widgets.Composite)
	 */
	public void initialize(Composite composite) {
		if (peerInfoComposite != null && !peerInfoComposite.isDisposed()) {
			Logger.log(new LogEvent(LogIDs.GUI, LogEvent.LT_ERROR,
					"PeerInfoView already initialized! Stack: "
							+ Debug.getStackTrace(true, false)));
			delete();
		}
		createPeerInfoPanel(composite);
	}

	private Composite createPeerInfoPanel(Composite parent) {
		GridLayout layout;
		GridData gridData;

		// Peer Info section contains
		// - Peer's Block display
		// - Peer's Datarate
		peerInfoComposite = new Composite(parent, SWT.NONE);
		layout = new GridLayout();
		layout.numColumns = 2;
		layout.horizontalSpacing = 0;
		layout.verticalSpacing = 0;
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		peerInfoComposite.setLayout(layout);
		gridData = new GridData(GridData.FILL, GridData.FILL, true, true);
		peerInfoComposite.setLayoutData(gridData);

		imageLabel = new Label(peerInfoComposite, SWT.NULL);
		gridData = new GridData();
		if (countryLocator != null)
			gridData.widthHint = 28;
		imageLabel.setLayoutData(gridData);

		topLabel = new Label(peerInfoComposite, SWT.NULL);
		gridData = new GridData(SWT.FILL, SWT.DEFAULT, false, false);
		topLabel.setLayoutData(gridData);

		sc = new ScrolledComposite(peerInfoComposite, SWT.V_SCROLL);
		sc.setExpandHorizontal(true);
		sc.setExpandVertical(true);
		layout = new GridLayout();
		layout.horizontalSpacing = 0;
		layout.verticalSpacing = 0;
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		sc.setLayout(layout);
		gridData = new GridData(GridData.FILL, GridData.FILL, true, true, 2, 1);
		sc.setLayoutData(gridData);
		sc.getVerticalBar().setIncrement(BLOCK_SIZE);

		peerInfoCanvas = new Canvas(sc, SWT.NO_REDRAW_RESIZE | SWT.NO_BACKGROUND);
		gridData = new GridData(GridData.FILL, SWT.DEFAULT, true, false);
		peerInfoCanvas.setLayoutData(gridData);
		peerInfoCanvas.addPaintListener(new PaintListener() {
			public void paintControl(PaintEvent e) {
				if (e.width <= 0 || e.height <= 0)
					return;
				try {
					Rectangle bounds = (img == null) ? null : img.getBounds();
					if (bounds == null) {
						e.gc.fillRectangle(e.x, e.y, e.width, e.height);
					} else {
						if (e.x + e.width > bounds.width)
							e.gc.fillRectangle(bounds.width, e.y, e.x + e.width
									- bounds.width + 1, e.height);
						if (e.y + e.height > bounds.height)
							e.gc.fillRectangle(e.x, bounds.height, e.width, e.y + e.height
									- bounds.height + 1);

						int width = Math.min(e.width, bounds.width - e.x);
						int height = Math.min(e.height, bounds.height - e.y);
						e.gc.drawImage(img, e.x, e.y, width, height, e.x, e.y, width,
								height);
					}
				} catch (Exception ex) {
				}
			}
		});
		Listener doNothingListener = new Listener() {
			public void handleEvent(Event event) {
			}
		};
		peerInfoCanvas.addListener(SWT.KeyDown, doNothingListener);

		peerInfoCanvas.addListener(SWT.Resize, new Listener() {
			public void handleEvent(Event e) {
				// wrap in asyncexec because sc.setMinWidth (called later) doesn't work
				// too well inside a resize (the canvas won't size isn't always updated)
				e.widget.getDisplay().asyncExec(new AERunnable() {
					public void runSupport() {
						if (img != null) {
							int iOldColCount = img.getBounds().width / BLOCK_SIZE;
							int iNewColCount = peerInfoCanvas.getClientArea().width / BLOCK_SIZE;
							if (iOldColCount != iNewColCount)
								refreshInfoCanvas();
						}
					}
				});
			}
		});

		sc.setContent(peerInfoCanvas);

		Composite legend = Legend.createLegendComposite(peerInfoComposite,
				blockColors, new String[] { "PeersView.BlockView.Avail.Have",
						"PeersView.BlockView.Avail.NoHave",
						"PeersView.BlockView.NoAvail.Have",
						"PeersView.BlockView.NoAvail.NoHave",
						"PeersView.BlockView.Transfer", "PeersView.BlockView.NextRequest",
						"PeersView.BlockView.AvailCount" }, new GridData(SWT.FILL,
						SWT.DEFAULT, true, false, 2, 1));

		int iFontPixelsHeight = 10;
		int iFontPointHeight = (iFontPixelsHeight * 72)
				/ peerInfoCanvas.getDisplay().getDPI().y;
		Font f = peerInfoCanvas.getFont();
		FontData[] fontData = f.getFontData();
		fontData[0].setHeight(iFontPointHeight);
		font = new Font(peerInfoCanvas.getDisplay(), fontData);