nextwindowbuttontag.java

java 写的一个新闻发布系统

package org.jahia.taglibs.button;

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

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 next window button for scrollable container lists</p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: Jahia Ltd</p>
 * @author Serge Huber
 * @version 1.0
 */
// 05.05.2002 NK : Added Post method support

public class NextWindowButtonTag extends AbstractButtonTag {

    private JahiaContainerList containerList = null;
    private String title = "Next&gt;&gt;";
    private String style = "";
    private String method = "get";
    private String formName = "";

    private int windowStepInt = 1;
    private int windowSizeInt = -1;

    // these are necessary since we must be JavaBean compliant.
    private String windowStep;
    private String windowSize;


    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 void setWindowStep(String windowStep) {
        this.windowStep = windowStep;
        try {
            windowStepInt = Integer.parseInt(windowStep);
            if (windowStepInt < 0)
              windowStepInt = 0;
        } catch (NumberFormatException nfe) {
            windowStepInt = 0;
        }
    }

    public void setWindowSize(String windowSize) {
        this.windowSize = windowSize;
        try {
            windowSizeInt = Integer.parseInt(windowSize);
            if (windowSizeInt < 1)
              windowSizeInt = -1;
        } catch (NumberFormatException nfe) {
            windowSizeInt = -1;
        }
    }

    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 int getWindowStepInt() {
        return this.windowStepInt;
    }

    public int getWindowSizeInt() {
        return this.windowSizeInt;
    }

    public String getWindowStep() {
        return this.windowStep;
    }

    public String getWindowSize() {
        return this.windowSize;
    }

    public boolean testRights (JahiaData jData) {
        JahiaUser user = jData.params().getUser();
        // retrieves the current container list
        ContainerListTag parent = (ContainerListTag) findAncestorWithClass(this,ContainerListTag.class);
        if (parent != null) {
            if (parent.isDeclarationPass()) {
                return false;
            }
            containerList = parent.getContainerList();
        }
        if (containerList != null) {
            Enumeration containers = containerList.getContainers();
            return ( containers.hasMoreElements() );
        }
        return false;
    }

    public String getLauncher(JahiaData jData) throws JahiaException {
        String value = jData.gui().drawContainerListNextWindowPageURL( containerList, windowStepInt, windowSizeInt, this.method.equals("post") );
        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;
    }

    public int doEndTag() throws JspException {
        // let's reinitialize the tag variables to allow tag object reuse in
        // pooling.
        containerList = null;
        title = "Next&gt;&gt;";
        style = "";
        method = "get";
        formName = "";

        windowStepInt = 1;
        windowSizeInt = -1;
        windowStep = null;
        windowSize = null;
        return EVAL_PAGE;
    }

}