wwindow.java

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/******************************************************************************
 * The contents of this file are subject to the   Compiere License  Version 1.1
 * ("License"); You may not use this file except in compliance with the License
 * You may obtain a copy of the License at http://www.compiere.org/license.html
 * Software distributed under the License is distributed on an  "AS IS"  basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
 * the specific language governing rights and limitations under the License.
 * The Original Code is Compiere ERP & CRM Smart Business Solution. The Initial
 * Developer of the Original Code is Jorg Janke. Portions created by Jorg Janke
 * are Copyright (C) 1999-2005 Jorg Janke.
 * All parts are Copyright (C) 1999-2005 ComPiere, Inc.  All Rights Reserved.
 * Contributor(s): ______________________________________.
 *****************************************************************************/
package org.compiere.www;

import java.io.*;
import java.math.*;
import java.sql.*;
import java.util.*;
import java.util.logging.*;
import javax.servlet.*;
import javax.servlet.http.*;
import org.apache.ecs.*;
import org.apache.ecs.xhtml.*;
import org.compiere.model.*;
import org.compiere.util.*;

/**
 *  Web Window Servlet
 *
 *  @author Jorg Janke
 *  @version  $Id: WWindow.java,v 1.28 2005/07/18 03:56:02 jjanke Exp $
 */
public class WWindow extends HttpServlet
{
	/**	Logger			*/
	protected static CLogger	log = CLogger.getCLogger(WWindow.class);
	
	/**
	 *  Initialize global variables
	 *  @param config
	 *  @throws ServletException
	 */
	public void init(ServletConfig config) throws ServletException
	{
		super.init (config);
		if (!WebEnv.initWeb(config))
			throw new ServletException("WWindow.init");
	}   //  init
	
	/**
	 * Get Servlet information
	 * @return info
	 */
	public String getServletInfo()
	{
		return "Compiere Web Window";
	}	//	getServletInfo

	/**
	 * Clean up resources
	 */
	public void destroy()
	{
		log.fine("destroy");
	}   //  destroy

	/** Window Number Counter                   */
	private static int          s_WindowNo  = 1;
	/** Form Name                               */
	protected static final String FORM_NAME   = "WForm";

	/**  Hidden Parameter   Command - Button    */
	private static final String P_Command   = "PCommand";
	/** Hidden Parameter - Tab No               */
	private static final String P_Tab       = "PTab";
	/** Hidden Parameter - MultiRow Row No      */
	private static final String P_MR_RowNo  = "PMRRowNo";
	/** Hidden Parameter - Changed Field for Callout/etc.	*/
	private static final String P_ChangedColumn = "ChangedColumn";

	/** Multi Row Lines per Screen          */
	private static final int    MAX_LINES   = 12;
	/** Indicator for last line             */
	private static final int    LAST_LINE   = 999999;

	/** Error Indicator                     */
	private static final String ERROR       = " ERROR! ";

	/**
	 *  Process the HTTP Get request - Initial Call.
	 *  <br>
	 *  http://localhost/compiere/WWindow?AD_Window_ID=123
	 *  <br>
	 *  Create Window with request parameters
	 *  AD_Window_ID
	 *  AD_Menu_ID
	 *
	 *  Clean up old/existing window
	 *
	 *  @param request
	 *  @param response
	 *  @throws ServletException
	 *  @throws IOException
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
	{
		//  Get Session attributes
		HttpSession sess = request.getSession();
		WebSessionCtx wsc = WebSessionCtx.get(request);
		if (wsc == null)
		{
			WebUtil.createTimeoutPage(request, response, this, null);
			return;
		}

		//  Parameter: AD_Window_ID
		int AD_Window_ID = WebUtil.getParameterAsInt(request, "AD_Window_ID");
		//  Get Parameter: Menu_ID
		int AD_Menu_ID = WebUtil.getParameterAsInt(request, "AD_Menu_ID");
		//
		log.info("AD_Window_ID=" + AD_Window_ID
			+ "; AD_Menu_ID=" + AD_Menu_ID);

		//  Clean up old Window
		WWindowStatus ws = WWindowStatus.get(request);
		if (ws != null)
		{
			int WindowNo = ws.mWindow.getWindowNo();
			log.fine("Disposing - WindowNo=" + WindowNo + ", ID=" + ws.mWindow.getAD_Window_ID());
			ws.mWindow.dispose();
			Env.clearWinContext(wsc.ctx, WindowNo);
		}

		/**
		 *  New Window data
		 */
		MWindowVO mWindowVO = MWindowVO.create (wsc.ctx, s_WindowNo++, AD_Window_ID, AD_Menu_ID);
		if (mWindowVO == null)
		{
			String msg = Msg.translate(wsc.ctx, "AD_Window_ID") + " "
				+ Msg.getMsg(wsc.ctx, "NotFound") + ", ID=" + AD_Window_ID + "/" + AD_Menu_ID;
			WebUtil.createErrorPage(request, response, this, msg);
			sess.setAttribute(WWindowStatus.NAME, null);
			return;
		}
		//  Create New Window
		ws = new WWindowStatus(mWindowVO);
		sess.setAttribute(WWindowStatus.NAME, ws);


		//  Query
		ws.curTab.query(ws.mWindow.isTransaction());
		ws.curTab.navigate(0);

		/**
		 *  Build Page
		 */
		WebDoc doc = null;
		if (ws.curTab.isSingleRow())
			doc = getSR_Form (request.getRequestURI(), wsc, ws);
		else
			doc = getMR_Form (request.getRequestURI(), wsc, ws);

		//	fini
		log.fine("Fini");
	//	log.trace(log.l6_Database, doc.toString());
		WebUtil.createResponse (request, response, this, null, doc, true);
		log.fine("Closed");
	}   //  doGet


	/**************************************************************************
	 *  Process the HTTP Post request
	 *
	 *  @param request request
	 *  @param response response
	 *  @throws ServletException
	 *  @throws IOException
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response) 
		throws ServletException, IOException
	{
		WebEnv.dump(request);
		//  Get Session Info
	  	WebSessionCtx wsc = WebSessionCtx.get(request);
		WWindowStatus ws = WWindowStatus.get(request);
		if (wsc == null || ws == null)
		{
			if (wsc == null)
				WebUtil.createTimeoutPage(request, response, this, "No Context");
			else
				doGet(request, response);
			return;
		}
		//  Get Parameter: Command
		String p_cmd = WebUtil.getParameter (request, P_Command);
		String column = WebUtil.getParameter (request, P_ChangedColumn);
		log.info("Cmd=" + p_cmd + " - ChangedColumn=" + column);

		//	Changed Column
		if (column != null && column.length() > 0)
		{
			updateFields(request, wsc, ws);
		}
		else	//	Exit & Commands
		{
			if (p_cmd.equals("Exit"))
			{
				MSession cSession = MSession.get(wsc.ctx, false);
				if (cSession != null)
					cSession.logout();
				WebUtil.createLoginPage(request, response, this, ws.ctx, "Exit");
				return;
			}
			executeCommand(request, p_cmd, wsc, ws);
		}
		

		/**************************************************
		 *  Build Page
		 */
		WebDoc doc = null;
		//  Create Simgle/Multi Row
		if (ws.curTab.isSingleRow())
			doc = getSR_Form (request.getRequestURI(), wsc, ws);
		else
			doc = getMR_Form (request.getRequestURI(), wsc, ws);

		//
		log.fine("Fini");
	//	log.trace(log.l6_Database, doc.toString());
		WebUtil.createResponse (request, response, this, null, doc, true);
		log.fine("Closed");
	}   //  doPost

	
	/**************************************************************************
	 *  Execute Command.
	 *
	 *  @param request request
	 *  @param p_cmd command
	 *  @param wsc session context
	 *  @param ws window status
	 */
	private void executeCommand (HttpServletRequest request, 
		String p_cmd, WebSessionCtx wsc, WWindowStatus ws)
	{
		//  Get Parameter: Command and Tab changes
		String p_tab = WebUtil.getParameter (request, P_Tab);
		String p_row = WebUtil.getParameter (request, P_MR_RowNo);    //  MR Row Command
		log.config(p_cmd + " - Tab=" + p_tab + " - Row=" + p_row);

		/**
		 *  Multi-Row Selection (i.e. display single row)
		 */
		if (p_row != null && p_row.length() > 0)
		{
			try
			{
				int newRowNo = Integer.parseInt (p_row);
				ws.curTab.navigate(newRowNo);
				ws.curTab.setSingleRow(true);
			}
			catch (Exception e)
			{
				log.log(Level.SEVERE, "Parse RowNo="+ p_row, e);
			}
		}

		/**
		 *  Tab Change
		 */
		else if (p_tab != null && p_tab.length() > 0)
		{
			int newTabNo = 0;
			try
			{
				newTabNo = Integer.parseInt (p_tab);
			}
			catch (Exception e)
			{
				log.log(Level.SEVERE, "Parse TabNo="+ p_tab, e);
			}
			//  move to detail
			if (newTabNo > ws.curTab.getTabNo())
			{
				ws.curTab = ws.mWindow.getTab(newTabNo);
				ws.curTab.query(false);
				ws.curTab.navigate(0);
			}
			//  move back
			else if (newTabNo < ws.curTab.getTabNo())
			{
				ws.curTab = ws.mWindow.getTab(newTabNo);
				ws.curTab.dataRefresh();
			}
		}

		/**
		 *  Multi-Row Toggle
		 */
		else if (p_cmd.equals("Multi"))
		{
			boolean single = ws.curTab.isSingleRow();
			ws.curTab.setSingleRow(!single);
			if (single)
				ws.curTab.navigate(0);
		}

		/**
		 *  Position Commands
		 */
		else if (p_cmd.equals("First"))
		{
			ws.curTab.navigate(0);
		}
		else if (p_cmd.equals("Next"))
		{
			ws.curTab.navigateRelative(+1);     //  multi row is positioned at last displayed row
		}
		else if (p_cmd.equals("Previous"))
		{
			int rows = ws.curTab.isSingleRow() ? -1 : -2*MAX_LINES;
			ws.curTab.navigateRelative(rows);
		}
		else if (p_cmd.equals("Last"))
		{
			ws.curTab.navigateRelative(999999);
		}


		/**
		 *  Find
		 */
		else if (p_cmd.equals("Find"))
		{
			/** @todo Find */
		}

		/**
		 *  Refresh
		 */
		else if (p_cmd.equals("Refresh"))
		{
			ws.curTab.dataRefreshAll();
		}

		/**
		 *  Attachment
		 */
		else if (p_cmd.equals("Attachment"))
		{
			/** @todo Attachment */
		}

		/**
		 *  History
		 */
		else if (p_cmd.equals("History"))
		{
			if (ws.mWindow.isTransaction() && ws.curTab.getWindowNo() == 0)
			{
				ws.curTab.query( !ws.curTab.isOnlyCurrentRows() );
				ws.curTab.navigate(0);