paginationtagstylespeed.java

羽量级数据持久层开发框架

/**
 *
 */



package org.speedframework.tag;

//~--- non-JDK imports --------------------------------------------------------

import org.speedframework.entity.Pagination;

//~--- JDK imports ------------------------------------------------------------

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

/**
 * <p/>
 * Title: SpeedFrameworkWork??锟斤拷???
 * </p>
 * <p/>
 * <p/>
 * Description: ???????????
 * </p>
 * <p/>
 * <p/>
 * Copyright: Copyright (c) 2006
 * </p>
 * <p/>
 * <p/>
 * Company: SpeedFrameworkWork
 * </p>
 *
 * @author ????? ?锟斤拷??13824431576
 * @version 1.1beta
 */
public class PaginationTagStyleSpeed extends TagSupport
 {

    /** 属性描述信息 */
    private static final long serialVersionUID = 1673491971683216709L;

    /** 属性描述信息 */
    private String formName = null;

    /** 属性描述信息 */
    private String name = null;

    /** 属性描述信息 */
    private String parameter = null;

    /** 属性描述信息 */
    private String path = null;

    /**
     * 方法描述信息，
     * 描述方法是做什么的，
     * 如何调用，最好给出调用代码示例。
     *
     * @param name
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * 方法描述信息，
     * 描述方法是做什么的，
     * 如何调用，最好给出调用代码示例。
     *
     * @param path
     */
    public void setPath(String path) {
        this.path = path;
    }

    /**
     * 方法描述信息，
     * 描述方法是做什么的，
     * 如何调用，最好给出调用代码示例。
     *
     * @param parameter
     */
    public void setParameter(String parameter) {
        this.parameter = parameter;
    }

    /**
     * 方法描述信息，
     * 描述方法是做什么的，
     * 如何调用，最好给出调用代码示例。
     *
     * @param formName
     */
    public void setFormName(String formName) {
        this.formName = formName;
    }

    /**
     * 方法描述信息，
     * 描述方法是做什么的，
     * 如何调用，最好给出调用代码示例。
     *
     * @return
     *
     * @throws JspException
     */
    public int doStartTag() throws JspException {
        Pagination pagination = null;

        if (this.path == null) {
            throw new NullPointerException("path is null");
        }

        if (this.name == null) {
            this.name = "pagination";
        }

        if (this.parameter == null) {
            this.parameter = "page";
        }

        pagination = (Pagination) pageContext.getRequest().getAttribute(name);

        if (pagination == null) {
            throw new NullPointerException(name + "is null in request");
        }

        try {
            JspWriter out = pageContext.getOut();

            out.print("<table border=0 cellpadding=0 width=10% cellspacing=0>");
            out.print("<tr align=center valign=top>");
            out.print("<td>");

            String contextPath = encodeURL(this.path, this.parameter);

            if ((this.formName != null) && (this.formName.length() > 0)) {
                if (pagination.isHasPreviousPage()) {
                    out.println(
                        "<a class=\"pagination\" href=\"" + contextPath + pagination.getPreviousPage()
                        + "\" onclick=\"paginationSubmit('" + pagination.getPreviousPage()
                        + "');return false;\" title=\"Previous\">"
                        + "<img src=\"pageimage/speed/pre.jpg\"  border=\"0\" /><img src=\"pageimage/speed/s.gif\"  border=\"0\" /><img src=\"pageimage/speed/p.gif\"  border=\"0\" /></br>"
                        + "Previous</a>");
                } else {
                    out.println(
                        "<img src=\"pageimage/speed/pre.jpg\"  border=\"0\" /><img src=\"pageimage/speed/s.gif\"  border=\"0\" /><img src=\"pageimage/speed/p.gif\"  border=\"0\" /></br>Previous");
                }

                out.print("</td>");

                for (int i = 1; i <= pagination.getTotalPage(); i++) {
                    out.print("<td>");

                    if (i != pagination.getCurrPage()) {
                        out.println("<a href=\"" + contextPath + i + "\" onclick=\"paginationSubmit('" + i
                                    + "');return false;\">"
                                    + "<img src=\"pageimage/speed/e.gif\"  border=\"0\" /></br>" + i + "</a>");
                    } else {
                        out.println("<img src=\"pageimage/speed/currE.gif\"  border=\"0\" /></br>" + i);
                    }

                    out.print("</td>");
                }

                out.print("</td>");
                out.print("<td>");

                if (pagination.isHasNextPage()) {
                    out.println(
                        "<a class=\"pagination\" href=\"" + contextPath + pagination.getNextPage()
                        + "\" onclick=\"paginationSubmit('" + pagination.getNextPage()
                        + "');return false;\"  title=\"Next\">"
                        + "<img src=\"pageimage/speed/currE.gif\"  border=\"0\" /><img src=\"pageimage/speed/d.gif\" border=\"0\" /><img src=\"pageimage/speed/next.jpg\" border=\"0\" /></br>"
                        + "Next</a>");
                } else {
                    out.println(
                        "<img src=\"pageimage/speed/currE.gif\"  border=\"0\" /><img src=\"pageimage/speed/d.gif\" border=\"0\" /><img src=\"pageimage/speed/next.jpg\" border=\"0\" /></br>Next");
                }
            } else {
                if (pagination.isHasPreviousPage()) {
                    out.println("<a class=\"pagination\" href=\"" + contextPath + "1\" title=\"First\">First</a>");
                    out.println("<a class=\"pagination\" href=\"" + contextPath + pagination.getPreviousPage()
                                + "\" title=\"Previous\">Previous</a>");
                } else {
                    out.println("<span title=\"First\">First</span>");
                    out.println("<span title=\"Previous\">Previous</span>");
                }

                if (pagination.isHasNextPage()) {
                    out.println("<a class=\"pagination\" href=\"" + contextPath + pagination.getNextPage()
                                + "\" title=\"Next\">Next</a>");
                    out.println("<a class=\"pagination\" href=\"" + contextPath + pagination.getTotalPage()
                                + "\" title=\"Last\">Last</a>");
                } else {
                    out.println("<span title=\"Next\">Next</span>");
                    out.println("<span title=\"Last\">Last</span>");
                }
            }

            out.print("</td>");
            out.print("</tr>");
            out.print("</table>");
            out.println("&nbsp;");
            out.println("Total " + pagination.getTotalCount() + "");
            out.print("&nbsp;");
            out.println("PageOf " + pagination.getCurrPage() + "");
            out.print("&nbsp;");

            /* ????CSS???? */
            createCSS(out);

            if ((this.formName != null) && (this.formName.length() > 0)) {

                /* ????js???? */
                createJS(out, contextPath, pagination.getTotalPage());
            } else {
                createNoFormJS(out, this.path, pagination.getTotalPage());
            }

            out.println();
        } catch (Exception e) {
            throw new JspException(e);
        }

        return SKIP_BODY;
    }

    /*
     *  (non-Javadoc)
     *
     *  @see javax.servlet.jsp.tagext.TagSupport#doEndTag()
     */

    /**
     * 方法描述信息，
     * 描述方法是做什么的，
     * 如何调用，最好给出调用代码示例。
     *
     * @return
     *
     * @throws JspException
     */
    public int doEndTag() throws JspException {
        return EVAL_PAGE;
    }

    /**
     * ???URL?????????action??servlet???
     *
     * @param href     ????锟???href
     * @param param
     * @return
     * @author
     */
    private final String encodeURL(String href, String param) {
        StringBuffer       buffer  = new StringBuffer(100);
        HttpServletRequest request = (HttpServletRequest) this.pageContext.getRequest();

        buffer.append(request.getContextPath() + "/" + href);

        int question = href.indexOf("?");

        if (question > 0) {
            buffer.append("&" + param + "=");
        } else {
            buffer.append("?" + param + "=");
        }

        return buffer.toString();
    }

    /**
     * ????js?????????form????js??
     *
     * @param out
     * @param contextPath
     * @param totalPage
     * @throws Exception
     * @author
     */
    private final void createJS(JspWriter out, String contextPath, int totalPage) throws Exception {
        out.println("<script language=\"javascript\">");
        out.println("function paginationSubmit(pageNum_) { ");
        out.println("  document." + formName + ".action=\'" + contextPath + "\' + pageNum_ + \'\';");
        out.println("  document." + formName + ".submit();");
        out.println("}");

        /* ??????? */
        HttpServletRequest request  = (HttpServletRequest) this.pageContext.getRequest();
        String             contPath = request.getContextPath() + "/" + this.path;

        out.println("function paginationGoto() { ");
        out.println("  if(!controlNotNull(document.all." + this.parameter + ", '??????')) {");
        out.println("    return;");
        out.println("  }");
        out.println("  ");
        out.println("  if(!controlIsInt(document.all." + this.parameter + ", '??????')) {");
        out.println("    return;");
        out.println("  }");
        out.println("  ");
        out.println("  pageNum_ = document.all." + this.parameter + ".value");
        out.println("  if(pageNum_ > 0 && pageNum_ <= " + totalPage + ") {");
        out.println("    document." + formName + ".action=\'" + contPath + "&" + this.parameter
                    + "=\' + pageNum_ + \'\';");
        out.println("    document." + formName + ".submit();");
        out.println("  } else { ");
        out.println("    alert(\"???????????锟斤拷\");");
        out.println("  }");
        out.println("}");
        out.println("</script>");
        out.println();
    }

    /**
     * ???????form???js
     *
     * @param out
     * @thros Exception
     * @author
     * @param href
     * @param totalPage
     *
     * @throws Exception
     */
    private final void createNoFormJS(JspWriter out, String href, int totalPage) throws Exception {
        HttpServletRequest request  = (HttpServletRequest) this.pageContext.getRequest();
        String             contPath = request.getContextPath() + "/" + href;

        out.println("<script language=\"javascript\">");
        out.println("function paginationGoto() { ");
        out.println("  if(!controlNotNull(document.all." + this.parameter + ", '??????')) {");
        out.println("    return;");
        out.println("  }");
        out.println("  ");
        out.println("  if(!controlIsInt(document.all." + this.parameter + ", '??????')) {");
        out.println("    return;");
        out.println("  }");
        out.println("  ");
        out.println("  pageNum_ = document.all." + this.parameter + ".value");
        out.println("  if(pageNum_ > 0 && pageNum_ <= " + totalPage + ") {");
        out.println("    document.location.href=\'" + contPath + "&" + this.parameter + "=\' + pageNum_ + \'\';");
        out.println("  } else { ");
        out.println("    alert(\"???????????锟斤拷\");");
        out.println("  }");
        out.println("}");
        out.println("</script>");
        out.println();
    }

    /**
     * ????css????
     *
     * @param out
     * @throws Exception
     * @author
     */
    private final void createCSS(JspWriter out) throws Exception {
        out.println("<style type=\"text/css\">");
        out.println("a.pagination:visited { text-decoration: underline; color: #808080; } ");    // #CCCCFF

        // #c0c0c0
        out.println("a.pagination:link { text-decoration: underline; color: blue; } ");
        out.println("a.pagination:hover { text-decoration: none; color: #009933; } ");
        out.println("a.pagination:active { text-decoration: none; color: orangered; } ");
        out.println("</style>");
    }
}