webpage.java

一个简单的java邮件系统

/*
 * @(#)WebPage.java
 *
 * Copyright (C) 2006 Sergey Bredikhin
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package olivax.webmail;

import java.io.Writer;
import java.util.Vector;

import oliva.common.OlivaUtils;

public class WebPage {

	private Vector rows = new Vector(10);
	
	private WebPane lastPane = null;
	
	private Vector lastRow = null;
	
	public WebPage() {
	}

	public void addPane(WebPane pane) {
		if(pane == null)
			return;		
		flushLast();
		lastPane = pane;		
	}
	
	private void flushLast() {
		if (lastPane != null) {
			if (lastRow != null) {
				lastRow.add(lastPane);
				rows.add(lastRow);
				lastRow = null;
			} else
				rows.add(lastPane);
		}
	}
	
	public void addPaneToSameRow(WebPane pane) {
		if(pane == null)
			return;
		if(lastPane == null) {
			lastPane = pane;
			return;
		}
		if(lastRow == null) {
			lastRow = new Vector(5);
		}		
		lastRow.add(lastPane);
		lastPane = pane;
	}
	
	private String showRow(Vector row) {
		StringBuffer sb = new StringBuffer();
		sb.append("<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\" width=\"100%\">\r\n");
		sb.append("<tr>\r\n");
		
		for(int i = 0; i < row.size(); i++) {
			WebPane pane = (WebPane)row.get(i);
			if(OlivaUtils.nvl(pane.getWidth()).equals(""))
				sb.append("<td>\r\n");
			else
				sb.append("<td width=\"100%\">\r\n");
			sb.append("\r\n").append(pane.show()).append("\r\n");
			sb.append("</td>\r\n");
		}
		
		sb.append("</tr>\r\n");
		sb.append("</table>\r\n");
		return sb.toString();
	}	
	
	public void show(Writer writer) throws Exception {
		flushLast();		

		for(int i = 0; i < rows.size(); i++) {
			Object row = rows.get(i);
			if(row instanceof WebPane)
				writer.write(((WebPane)row).show());
			else if(row instanceof Vector)
				writer.write(showRow((Vector)row));
		}
	}
}