win32transfertypes.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:   Win32TransferTypes.java

package org.gudy.azureus2.ui.swt.test;

import java.io.PrintStream;
import org.eclipse.swt.dnd.*;
import org.eclipse.swt.internal.ole.win32.COM;
import org.eclipse.swt.internal.win32.TCHAR;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.*;

public class Win32TransferTypes extends ByteArrayTransfer
{

	private static Win32TransferTypes _instance = new Win32TransferTypes();
	private int ids[];
	private String names[];

	public static void main(String args[])
	{
		Display display = new Display();
		Shell shell = new Shell(display);
		shell.setLayout(new FillLayout());
		Canvas canvas = new Canvas(shell, 0);
		DropTarget target = new DropTarget(canvas, 31);
		target.setTransfer(new Transfer[] {
			getInstance(), TextTransfer.getInstance(), FileTransfer.getInstance()
		});
		target.addDropListener(new DropTargetAdapter() {

			public void dragEnter(DropTargetEvent event)
			{
				event.detail = 4;
				String ops = "";
				if ((event.operations & 1) != 0)
					ops = (new StringBuilder()).append(ops).append("Copy;").toString();
				if ((event.operations & 2) != 0)
					ops = (new StringBuilder()).append(ops).append("Move;").toString();
				if ((event.operations & 4) != 0)
					ops = (new StringBuilder()).append(ops).append("Link;").toString();
				System.out.println((new StringBuilder()).append("Allowed Operations are ").append(ops).toString());
				TransferData data[] = event.dataTypes;
				for (int i = 0; i < data.length; i++)
				{
					int id = data[i].type;
					String name = Win32TransferTypes.getNameFromId(id);
					System.out.println((new StringBuilder()).append("Data type is ").append(id).append(" ").append(name).toString());
				}

			}

			public void dragOver(DropTargetEvent event)
			{
				event.detail = 4;
			}

			public void drop(DropTargetEvent event)
			{
				System.out.println((new StringBuilder()).append("URL dropped: ").append(event.data).toString());
				System.out.println((new StringBuilder()).append("Data type is ").append(event.currentDataType.type).append(" ").append(Win32TransferTypes.getNameFromId(event.currentDataType.type)).toString());
			}

		});
		shell.setSize(400, 400);
		shell.open();
		do
		{
			if (shell.isDisposed())
				break;
			if (!display.readAndDispatch())
				display.sleep();
		} while (true);
		display.dispose();
	}

	public static Win32TransferTypes getInstance()
	{
		return _instance;
	}

	Win32TransferTypes()
	{
		ids = new int[50000];
		names = new String[50000];
		for (int i = 0; i < ids.length; i++)
		{
			ids[i] = i;
			names[i] = getNameFromId(i);
		}

	}

	public void javaToNative(Object obj, TransferData transferdata)
	{
	}

	public Object nativeToJava(TransferData transferData)
	{
		byte buffer[] = (byte[])(byte[])super.nativeToJava(transferData);
		if (buffer == null)
			return null;
		int size = buffer.length;
		byte text[] = new byte[size];
		int j = 0;
		for (int i = 0; i < buffer.length; i++)
			if (buffer[i] != 0)
				text[j++] = buffer[i];

		String data = new String(text, 0, j);
		int end = data.indexOf("\n");
		return end < 0 ? data : data.substring(0, end);
	}

	protected String[] getTypeNames()
	{
		return names;
	}

	protected int[] getTypeIds()
	{
		return ids;
	}

	static String getNameFromId(int id)
	{
		String name = null;
		int maxSize = 128;
		TCHAR buffer = new TCHAR(0, maxSize);
		int size = COM.GetClipboardFormatName(id, buffer, maxSize);
		if (size != 0)
			name = buffer.toString(0, size);
		else
			switch (id)
			{
			case 15: // '\017'
				name = "CF_HDROP";
				break;

			case 1: // '\001'
				name = "CF_TEXT";
				break;

			case 2: // '\002'
				name = "CF_BITMAP";
				break;

			case 3: // '\003'
				name = "CF_METAFILEPICT";
				break;

			case 4: // '\004'
				name = "CF_SYLK";
				break;

			case 5: // '\005'
				name = "CF_DIF";
				break;

			case 6: // '\006'
				name = "CF_TIFF";
				break;

			case 7: // '\007'
				name = "CF_OEMTEXT";
				break;

			case 8: // '\b'
				name = "CF_DIB";
				break;

			case 9: // '\t'
				name = "CF_PALETTE";
				break;

			case 10: // '\n'
				name = "CF_PENDATA";
				break;

			case 11: // '\013'
				name = "CF_RIFF";
				break;

			case 12: // '\f'
				name = "CF_WAVE";
				break;

			case 13: // '\r'
				name = "CF_UNICODETEXT";
				break;

			case 14: // '\016'
				name = "CF_ENHMETAFILE";
				break;

			case 16: // '\020'
				name = "CF_LOCALE";
				break;

			case 17: // '\021'
				name = "CF_MAX";
				break;
			}
		return name;
	}

}