/**
 *
 */
package org.speedframework.tag;


import java.io.IOException;

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

import org.apache.log4j.Logger;
import org.speedframework.entity.*;

/**
 * <p>
 * Title: SpeedFrameworkWork持久層框架
 * </p>
 * 
 * <p>
 * Description: 基于分頁標簽類
 * </p>
 * 
 * <p>
 * Copyright: Copyright (c) 2006
 * </p>
 * 
 * <p>
 * Company: SpeedFrameworkWork
 * </p>
 * 
 * @author 李志峰 電話：13824431576
 * @version 1.1beta
 */
public class PaginationTagSpeedStyleOne extends TagSupport {
	private static final Logger log = Logger.getLogger(PaginationTagSpeedStyleOne.class);
	private static final long serialVersionUID = 1673491971683216709L;

	private String path = null;

	private String name = null;

	private String parameter = null;

	private String formName = null;

	public void setName(String name) {
		this.name = name;
	}

	public void setPath(String path) {
		this.path = path;
	}

	public void setParameter(String parameter) {
		this.parameter = parameter;
	}

	public void setFormName(String formName) {
		this.formName = formName;
	}

	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) {
				this.getPreviousPageWriter(pagination, out, contextPath);
				out.print("</td>");				
				this.getCurrPageWriter(pagination, out, contextPath);
				out.print("</td>");
				out.print("<td>");
				this.getNextPageWriter(pagination, out, contextPath);
				
			} 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;");

			/* 創建CSS內容 */
			createCSS(out);
			if (this.formName != null && this.formName.length() > 0) {
				/* 創建js內容 */
				createJS(out, contextPath, pagination.getTotalPage());
			} else {
				createNoFormJS(out, this.path, pagination.getTotalPage());
			}
			out.println();
		} catch (Exception e) {
			throw new JspException(e);
		}

		return SKIP_BODY;
	}

	private void getNextPageWriter(Pagination pagination, JspWriter out, String contextPath) throws IOException {
		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");
		}
	}

	/**
	 * 下移式分頁
	 * @param pagination
	 * @param out
	 * @param contextPath
	 * @throws IOException
	 */
	private void getCurrPageWriter(Pagination pagination, JspWriter out, String contextPath) throws IOException {		
		int beginPage =pagination.getCurrPage()  - 3 < 1 ? 1 : pagination.getCurrPage() - 3;		
		for (int i = beginPage, j = 0; i <= pagination.getTotalPage() && j < 6; i++, j++) {
			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>");
		}
	}

	private void getPreviousPageWriter(Pagination pagination, JspWriter out, String contextPath) throws IOException {
		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");
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.jsp.tagext.TagSupport#doEndTag()
	 */
	public int doEndTag() throws JspException {

		return EVAL_PAGE;
	}

	/**
	 * 改變URL使它能訪問到action或servlet中去
	 * 
	 * @param href
	 *            從頁面傳來的href
	 * @param param
	 * @param queryStr
	 *            查詢內容
	 * @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();
	}

	/**
	 * 創建js內容如果提交form就用js提交
	 * 
	 * @param out
	 * @param contextPath
	 * @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("}");
		/* 跳轉內容 */
		HttpServletRequest request = (HttpServletRequest) this.pageContext
				.getRequest();
		String contPath = request.getContextPath() + "/" + this.path;
		out.println("function paginationGoto() { ");
		out.println("  if(!controlNotNull(document.all." + this.parameter
				+ ", '跳轉頁面')) {");
		out.println("    return;");
		out.println("  }");
		out.println("  ");
		out.println("  if(!controlIsInt(document.all." + this.parameter
				+ ", '跳轉頁面')) {");
		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(\"您輸入的頁數超出范圍\");");
		out.println("  }");
		out.println("}");
		out.println("</script>");
		out.println();
	}

	/**
	 * 創建沒有form時的js
	 * 
	 * @param out
	 * @param contextPath
	 * @thros Exception
	 * @author
	 */
	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
				+ ", '跳轉頁面')) {");
		out.println("    return;");
		out.println("  }");
		out.println("  ");
		out.println("  if(!controlIsInt(document.all." + this.parameter
				+ ", '跳轉頁面')) {");
		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(\"您輸入的頁數超出范圍\");");
		out.println("  }");
		out.println("}");
		out.println("</script>");
		out.println();
	}

	/**
	 * 創建css內容
	 * 
	 * @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>");
	}


}