uitextareaimpl.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:   UITextAreaImpl.java

package org.gudy.azureus2.pluginsimpl.local.ui.components;

import java.io.*;
import java.util.Iterator;
import java.util.LinkedList;
import org.gudy.azureus2.core3.util.*;
import org.gudy.azureus2.plugins.ui.components.UIPropertyChangeListener;
import org.gudy.azureus2.plugins.ui.components.UITextArea;

// Referenced classes of package org.gudy.azureus2.pluginsimpl.local.ui.components:
//			UIComponentImpl

public class UITextAreaImpl extends UIComponentImpl
	implements UITextArea
{

	private int max_size;
	private int max_file_size;
	PrintWriter pw;
	int current_file_size;
	File file;
	boolean useFile;
	AEMonitor file_mon;
	LinkedList delay_text;
	int delay_size;
	FrequencyLimitedDispatcher dispatcher;

	public UITextAreaImpl()
	{
		max_size = 60000;
		max_file_size = 20 * max_size;
		useFile = true;
		file_mon = new AEMonitor("filemon");
		delay_text = new LinkedList();
		delay_size = 0;
		dispatcher = new FrequencyLimitedDispatcher(new AERunnable() {

			final UITextAreaImpl this$0;

			public void runSupport()
			{
				delayAppend();
			}

			
			{
				this$0 = UITextAreaImpl.this;
				super();
			}
		}, 500);
		setText("");
	}

	public void setText(String text)
	{
		if (!useFile)
			break MISSING_BLOCK_LABEL_104;
		file_mon.enter();
		if (pw != null)
			break MISSING_BLOCK_LABEL_84;
		file = AETemporaryFileHandler.createTempFile();
		FileWriter fr = new FileWriter(file);
		pw = new PrintWriter(fr);
		pw.print(text);
		current_file_size = text.length();
		pw.flush();
		file_mon.exit();
		return;
		IOException e;
		e;
		file_mon.exit();
		break MISSING_BLOCK_LABEL_104;
		Exception exception;
		exception;
		file_mon.exit();
		throw exception;
		if (text.length() > max_size)
		{
			int size_to_show = max_size - 10000;
			if (size_to_show < 0)
				size_to_show = max_size;
			text = text.substring(text.length() - size_to_show);
		}
		setProperty("value", text);
		return;
	}

	public void appendText(String text)
	{
		if (!useFile || pw == null)
			break MISSING_BLOCK_LABEL_83;
		file_mon.enter();
		if (current_file_size > max_file_size)
			getFileText();
		pw.print(text);
		current_file_size += text.length();
		pw.flush();
		file_mon.exit();
		return;
		Exception exception;
		exception;
		file_mon.exit();
		throw exception;
		synchronized (this)
		{
			delay_text.addLast(text);
			String s;
			for (delay_size += text.length(); delay_size > max_size && delay_text.size() != 0; delay_size -= s.length())
				s = (String)delay_text.removeFirst();

		}
		dispatcher.dispatch();
		return;
	}

	protected void delayAppend()
	{
		String str = getText();
		String text;
		synchronized (this)
		{
			if (delay_text.size() == 1)
			{
				text = (String)delay_text.get(0);
			} else
			{
				StringBuffer sb = new StringBuffer(delay_size);
				for (Iterator it = delay_text.iterator(); it.hasNext(); sb.append((String)it.next()));
				text = sb.toString();
			}
			delay_text.clear();
			delay_size = 0;
		}
		if (str == null)
			setText(text);
		else
			setText((new StringBuilder()).append(str).append(text).toString());
	}

	public String getText()
	{
		if (useFile && pw != null)
			return getFileText();
		else
			return (String)getProperty("value");
	}

	public void setMaximumSize(int _max_size)
	{
		max_size = _max_size;
	}

	private String getFileText()
	{
		boolean recreate = pw != null;
		String s;
		file_mon.enter();
		if (recreate)
			pw.close();
		String text = null;
		try
		{
			text = FileUtil.readFileEndAsString(file, max_size);
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
		if (text == null)
			text = "";
		if (recreate)
			try
			{
				FileWriter fr = new FileWriter(file);
				pw = new PrintWriter(fr);
				pw.print(text);
				current_file_size = text.length();
			}
			catch (IOException e)
			{
				useFile = false;
				e.printStackTrace();
			}
		s = text;
		file_mon.exit();
		return s;
		Exception exception;
		exception;
		file_mon.exit();
		throw exception;
	}

	public void addPropertyChangeListener(UIPropertyChangeListener l)
	{
		if (!useFile)
			break MISSING_BLOCK_LABEL_66;
		if (pw == null)
			break MISSING_BLOCK_LABEL_53;
		file_mon.enter();
		pw.close();
		pw = null;
		file_mon.exit();
		break MISSING_BLOCK_LABEL_53;
		Exception exception;
		exception;
		file_mon.exit();
		throw exception;
		useFile = false;
		setText(getFileText());
		super.addPropertyChangeListener(l);
		return;
	}
}