clistpaginationpreviousrangeofpagestag.java

java 写的一个新闻发布系统

package org.jahia.taglibs.pagination;

import org.jahia.data.JahiaData;
import org.jahia.data.containers.JahiaContainerList;
import org.jahia.data.containers.JahiaContainerListPagination;
import org.jahia.exceptions.JahiaException;
import org.jahia.services.usermanager.JahiaUser;
import org.jahia.utils.JahiaConsole;
import org.jahia.taglibs.util.Utils;
import org.jahia.taglibs.button.AbstractButtonTag;
import org.jahia.taglibs.container.ContainerListTag;

import java.io.*;
import java.util.*;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;

/**
 * <p>Title: This tag generates a previous range of page step button for scrollable container lists</p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: Jahia Ltd</p>
 * @author NK
 * @version 1.0
 */

public class CListPaginationPreviousRangeOfPagesTag extends AbstractButtonTag {

    private JahiaContainerList containerList = null;
    private JahiaContainerListPagination cPagination = null;
    private CListPaginationTag cPaginationTag = null;

    private String title = "Next&gt;&gt;";
    private String style = "";
    private String method = "get";
    private String formName = "";
	
    public void setTitle(String title) {
        this.title = title;
    }

    public void setStyle(String style) {
        this.style = style;
    }

    public void setMethod(String method) {
        if ( method != null )
        {
        	this.method = method;
        }
    }

    public void setFormName(String formName) {
        if ( formName != null )
        {
        	this.formName = formName.trim();
        }
    }

    public String getTitle() {
        return this.title;
    }

    public String getStyle() {
        return this.style;
    }

    public String getMethod() {
        return this.method;
    }

    public String getFormName() {
        return this.formName;
    }

    public boolean testRights (JahiaData jData) {

        cPaginationTag = (CListPaginationTag) findAncestorWithClass(this,CListPaginationTag.class);
        if ( cPaginationTag == null ){
        	return false;
        }
        if ( cPaginationTag.getNbStepPerPage()<=0 ){
        	return false;
        }
        ContainerListTag parent = (ContainerListTag) findAncestorWithClass(this,ContainerListTag.class);
        if (parent != null) {
            this.containerList = parent.getContainerList();
        	if ( this.containerList != null ){
				this.cPagination = this.containerList.getCtnListPagination();
				if ( this.cPagination != null && this.cPagination.isValid())
				{
					return true;	
				}
        	}
        }
        return false;
    }

    public String getLauncher(JahiaData jData) throws JahiaException {

        String value = null;
     	//JahiaConsole.println("CListPaginationPreviousRangeOfPagesTag.getLauncher","Started ---------------------------------------"); 
     	//JahiaConsole.println("CListPaginationPreviousRangeOfPagesTag.getLauncher","Page Number :" + cPaginationTag.getPageNumber()); 
     	//JahiaConsole.println("CListPaginationPreviousRangeOfPagesTag.getLauncher","Stop Page :" + cPaginationTag.getStopPageIndex()); 
     	//JahiaConsole.println("CListPaginationPreviousRangeOfPagesTag.getLauncher","Total Pages :" + this.cPagination.getNbPages()); 

        if ( (cPaginationTag.getPageNumber()==cPaginationTag.getStartPageIndex())
             && (cPaginationTag.getStartPageIndex()>1) ){
        	
     		//JahiaConsole.println("CListPaginationPreviousRangeOfPagesTag.getLauncher","Yes starting generate next[X] button"); 

        	value = jData.gui().drawContainerListPreviousWindowPageURL( containerList, cPagination.getCurrentPageIndex()-cPaginationTag.getStartPageIndex()+1, this.cPagination.getWindowSize(), this.method.equals("post") );
     		//JahiaConsole.println("CListPaginationPreviousRangeOfPagesTag.getLauncher","Values is :" + value); 

	        if ( value != null && this.method.equals("post") )
	        {
				StringBuffer buff = new StringBuffer("javascript:changePage(document.");
				buff.append(getFormName());
				buff.append(",document.");
				buff.append(getFormName());
				buff.append(".ctnscroll_");
				buff.append(containerList.getDefinition().getName());
				buff.append(",'");
				buff.append(value);
				buff.append("');");
				value = buff.toString();			
	      	}
	    }
	    return value;
    }
}