stylemanager.java

这是一个轻便的j2ee的web应用框架,是一个在多个项目中运用的实际框架,采用struts,hebinate,xml等技术,有丰富的tag,role,navigation,session,dictio

/*
 * Created on 2004-8-18
 *
 */
package com.esimple.framework.web.style;

import java.util.HashMap;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.esimple.framework.configuration.*;
import com.esimple.framework.web.util.CookieUtils;

/**
 * @author steven
 *
 */
public class StyleManager {
	private Log log = LogFactory.getLog(this.getClass());
	
	public static final String SESSION_NAME	= "ESIMPLE_STYLE";
	public static final String BEAN_NAME	= "StyleManager";
	
	public static final String FILE_STYLECONFIG	= "/WEB-INF/styleConfig.xml";
	
	public static final String CSS_FILE_NAME	= "style.css";
	
	public static final String DEFAULT_CSS_PATH = "/theme/style0/style.css";
	public static final String DEFAULT_STYLE 	= "/theme/style0/";
	
	private Configuration styleConfig;
	private String root;
	private String defaultStyle;
	private HashMap styles = new HashMap();
	private HashMap descs = new HashMap();
	
	private boolean isInit = false;
	
	public void setStyleConfig(Configuration styleConfig){
		this.styleConfig = styleConfig;
	}
	
	public void init() throws Exception{
		try{
			root = styleConfig.getChild("root").getValue();
			defaultStyle =  styleConfig.getChild("default").getValue();
			Configuration[] scs = styleConfig.getChild("styles").getChildren();
			for(int i = 0;i < scs.length;i++){
				String name = scs[i].getAttribute("name");
				String path = scs[i].getAttribute("path");
				String desc = scs[i].getValue();
				styles.put(name,path);
				descs.put(name,desc);
			}
		}catch(Exception e){
			log.error("can not read style config:" + e);
			log.debug( e.getMessage());
			isInit = false;
		}
		
		isInit =true;
	}
	
	
	public String getStylePath( String styleName ){
		String rt = null;
		String stylePath = (String)styles.get(styleName);
		if( !isInit || stylePath == null ) return DEFAULT_STYLE;
		rt = root + "/" + stylePath +"/";
		return rt;
	}
	
	
	public void setStyle( HttpServletRequest req,HttpServletResponse res,String styleName ){
		CookieUtils.setValue(req,res,SESSION_NAME,styleName,CookieUtils.ONE_MONTH_AGE);
		req.getSession().setAttribute(SESSION_NAME,styleName);
	}
	
	public String getStylePath(HttpServletRequest req){
		String cs = (String) req.getSession().getAttribute( SESSION_NAME );
		if( cs == null ){
			cs = CookieUtils.getValue(req,SESSION_NAME);
			if( cs == null ) cs = defaultStyle;
			req.getSession().setAttribute(SESSION_NAME,cs);
		}
		return getStylePath(cs);
	}
	
	public String getImgPath(HttpServletRequest req){

		return getStylePath(req) + "images/";
	}
		
	public String getCSSPath(HttpServletRequest req){
		String cs = getStylePath( req );
		return  cs + CSS_FILE_NAME;
	}

}