pagertag.java

struts+spring+hibernate自创框架

package com.pegasus.framework.component.taglib.html.pager;

import javax.servlet.jsp.JspException;

import com.pegasus.framework.component.taglib.xml.Xhtml;


public class PagerTag extends BasePagerTag {

	// private Logger logger = LogManager.getLogger(BasePagerTag.class);

	/**
	 * 组装HTML.
	 */
	protected void prepareHtml() throws JspException{
		startTable();
		prepareComponent(getFirstImg(), getFirstSource(), getJSTaglibPagerGoToPageDefine("FIRST"));
		writer.text(getSeparator());
		prepareComponent(getPreImg(), getPreSource(), getJSTaglibPagerGoToPageDefine("PRE"));
		writer.textBlank(Integer.parseInt("5"));
		preparePages(showPageNumber, maxPageNumber);
		writer.textBlank(Integer.parseInt("5"));
		prepareComponent(getNextImg(), getNextSource(), getJSTaglibPagerGoToPageDefine("NEXT"));
		writer.text(getSeparator());
		prepareComponent(getLastImg(), getLastSource(), getJSTaglibPagerGoToPageDefine("LAST"));
		writer.textBlank(2);
		prepareCurAndTotalPage(getPageNo(), getTotalPageCount());
		writer.textBlank(2);
		prepareTotalObject(getTotalObjectCount());
		writer.textBlank(2);
		prepareFetchSize(getFetchSize());
		endTable();

	}

	/**
	 * 组装javascipt.
	 */
	protected void prepareJs() throws JspException{
		prepareJSTaglibPagerGoToPage();

	}

	/**
	 * Gets the JS taglib pager go to page define.
	 * 
	 * @param actionType the action type
	 * 
	 * @return the JS taglib pager go to page define
	 */
	private String getJSTaglibPagerGoToPageDefine(String actionType) {
		return getJSTaglibPagerGoToPageDefine(actionType, getPageNo());
	}

	/**
	 * Gets the JS taglib pager go to page define.
	 * 
	 * @param actionType the action type
	 * @param pageNo the page no
	 * 
	 * @return the JS taglib pager go to page define
	 */
	private String getJSTaglibPagerGoToPageDefine(String actionType, int pageNo) {
		StringBuffer function = new StringBuffer();
		function.append("taglib_pager_goToPage(");
		function.append(getName()).append(",'");
		function.append(actionType).append("',");
		function.append(pageNo).append(",");
		function.append(getTotalPageCount()).append(")");
		return function.toString();
	}

	/**
	 * Prepare JS taglib pager go to page.
	 */
	private void prepareJSTaglibPagerGoToPage() {
		writer.startElement(Xhtml.Html.SCRIPT);
		writer.attribute(Xhtml.Attr.TYPE, "text/javascript");
		writer.attribute(Xhtml.Attr.LANGUAGE, "JavaScript");
		writer.textLineBreak();
		StringBuffer function = new StringBuffer();
		function.append(" function taglib_pager_goToPage(form,action_type,pageNo, totalPageCount){").append(
				"\n");
		function.append("	if(pageNo == -1) pageNo = document.getElementById('").append(getPageNoProperty())
				.append("').value *1;").append("\n");
		function.append(" 	switch(action_type) {").append("\n");
		function.append(" 		case 'FIRST' : ").append("\n");
		function.append("			pageNo = 1;if(totalPageCount == 0) pageNo =0;break;").append("\n");
		function.append(" 		case 'PRE': ").append("\n");
		function.append(" 			pageNo = pageNo - 1;if(pageNo <= 1) pageNo =1;").append("\n");
		function.append(" 			  if(totalPageCount == 0) pageNo =0;break;").append("\n");
		function.append(" 		case 'NEXT': ").append("\n");
		function
				.append(" 			pageNo = pageNo + 1;if(pageNo > totalPageCount ) pageNo = totalPageCount;break;")
				.append("\n");
		function.append(" 		case 'LAST': ").append("\n");
		function.append(" 			pageNo = totalPageCount;if(totalPageCount == 0) pageNo =0;break;").append("\n");
		function.append(" 		case 'GO': ").append("\n");
		function.append(" 			if(pageNo > totalPageCount ) pageNo = totalPageCount;").append("\n");
		function.append(" 			if(pageNo < 1 ) pageNo = 1;").append("\n");
		function.append(" 			break;").append("\n");
		function.append(" 	}").append("\n");
		function.append(" 	if(pageNo < 0) return;").append("\n");
		function.append(" 	if(pageNo > totalPageCount) return;").append("\n");
		function.append(" 	document.getElementById('").append(getPageNoProperty()).append(
				"').value = pageNo;").append("\n");
		if (getUrl() != null && getUrl().length() > 0) {
			function.append(" 	form.action = '" + getUrl() + "';").append("\n");
		}
		function.append(" 	form.submit();").append("\n");
		function.append("}").append("\n");
		writer.text(function);
		writer.endElement(Xhtml.Html.SCRIPT);
		writer.textLineBreak();
	}

	/**
	 * Start table.
	 */
	private void startTable() {
		writer.startElement(Xhtml.Html.DIV);
		writer.startElement(Xhtml.Html.TABLE);
		writer.attribute(Xhtml.Attr.CLASS, tableStyleClass);
		writer.attribute(Xhtml.Attr.STYLE, tableStyle);
		writer.startElement(Xhtml.Html.TR);
		writer.startElement(Xhtml.Html.TD);
		writer.attribute(Xhtml.Attr.CLASS, tdStyleClass);
		writer.attribute(Xhtml.Attr.STYLE, tdStyle);

	}

	/**
	 * End table.
	 */
	private void endTable() {
		writer.endElement(Xhtml.Html.TD);
		writer.endElement(Xhtml.Html.TR);
		writer.endElement(Xhtml.Html.TABLE);
		writer.endElement(Xhtml.Html.DIV);
	}

	/**
	 * Prepare component.组装前进，后退，首页，尾页
	 * 
	 * @param img the img
	 * @param source the source
	 * @param clickFunction the click function
	 */
	private void prepareComponent(String img, String source, String clickFunction) throws JspException{
		if (PAGE_TYPE_IMG.equals(getPageType())) {
			writer.startElement(Xhtml.Html.IMG);
			if (btnStyle == null) {
				writer.attribute(Xhtml.Attr.STYLE, "cursor:hand;");
			}
			else {
				writer.attribute(Xhtml.Attr.STYLE, btnStyle + ";cursor:hand;");
			}
			writer.attribute(Xhtml.Attr.SRC, img);
			writer.attribute(Xhtml.Attr.ALT, getMessage(source, isUseResource(), getBundle()));
			writer.attribute(Xhtml.Attr.ONCLICK, clickFunction);
		}
		else if (PAGE_TYPE_BTN.equals(getPageType())) {
			writer.startElement(Xhtml.Html.INPUT);
			writer.attribute(Xhtml.Attr.CLASS, btnStyleClass);
			if (btnStyle == null) {
				writer.attribute(Xhtml.Attr.STYLE, "cursor:hand;");
			}
			else {
				writer.attribute(Xhtml.Attr.STYLE, btnStyle + ";cursor:hand;");
			}
			writer.attribute(Xhtml.Attr.TYPE, PagerConstant.INPUT_TYPE_BUTTON);
			writer.attribute(Xhtml.Attr.VALUE, getMessage(source, isUseResource(), getBundle()));
			writer.attribute(Xhtml.Attr.ONCLICK, clickFunction);
		}
		else if (PAGE_TYPE_LINK.equals(getPageType())) {
			writer.startElement(Xhtml.Html.A);
			writer.attribute(Xhtml.Attr.ONCLICK, clickFunction);
			writer.attribute(Xhtml.Attr.CLASS, btnStyleClass);
			if (btnStyle == null) {
				writer.attribute(Xhtml.Attr.STYLE, "cursor:hand;");
			}
			else {
				writer.attribute(Xhtml.Attr.STYLE, btnStyle + ";cursor:hand;");
			}
			writer.text(getMessage(source, isUseResource(), getBundle()));
			writer.endElement(Xhtml.Html.A);
		}
		else {
			throw new JspException("don't support pageType:" + getPageType());
		}
	}

	/**
	 * Prepare pages.组装google样式
	 * 
	 * @param showPageNumber the show page number
	 * @param maxPageNumber the max page number
	 */
	private void preparePages(boolean showPageNumber, int maxPageNumber) {
		if (showPageNumber) {
			for (int i = pageNo; i < pageNo + maxPageNumber; i++) {
				writer.startElement(Xhtml.Html.A);
				writer.attribute(Xhtml.Attr.ONCLICK, getJSTaglibPagerGoToPageDefine("GO", i));
				writer.attribute(Xhtml.Attr.STYLE, "cursor:hand;");
				writer.text(new Integer(i));
				writer.endElement(Xhtml.Html.A);
				if (i >= totalPageCount) {
					break;
				}
			}
		}
	}

	/**
	 * Prepare cur and total page.组装当前页和总页数
	 * 
	 * @param pageNo the page no
	 * @param totalPageCount the total page count
	 */
	private void prepareCurAndTotalPage(int pageNo, int totalPageCount) {
		writer.startElement(Xhtml.Html.INPUT);
		writer.attribute(Xhtml.Attr.NAME, getPageNoProperty());
		writer.attribute(Xhtml.Attr.CLASS, inputStyleClass);
		writer.attribute(Xhtml.Attr.STYLE, inputStyle);
		writer.attribute(Xhtml.Attr.TYPE, PagerConstant.INPUT_TYPE_TEXT);
		writer.attribute(Xhtml.Attr.VALUE, new Integer(pageNo).toString());
		writer.attribute(Xhtml.Attr.SIZE, new Integer(DEFAULT_INPUT_SIZE).toString());
		writer.attribute(Xhtml.Attr.MAXLENGTH, new Integer(DEFAULT_INPUT_MAXLENGTH).toString());
		writer.attribute(Xhtml.Attr.ONKEYDOWN, "if(event.keyCode==13) "
				+ getJSTaglibPagerGoToPageDefine("GO", -1));
		writer.textForwardSlash();
		writer.text(new Integer(totalPageCount).toString());
	}

	/**
	 * Prepare total object.组装总记录数
	 * 
	 * @param totalObjectCount the total object count
	 */
	private void prepareTotalObject(int totalObjectCount) {
		writer.text(getMessage(getTotalObjectTitle(), isUseResource(), getBundle()));
		writer.textBlank();
		writer.text(new Integer(totalObjectCount).toString());
	}

	/**
	 * Prepare fetch size.组装当前页数量
	 * 
	 * @param fetchSize the fetch size
	 */
	private void prepareFetchSize(int fetchSize) {
		String fetchSizeStr = new Integer(fetchSize).toString();
		writer.text(getMessage(getFetchSizeTitle(), isUseResource(), getBundle()));
		writer.textBlank();
		writer.startElement(Xhtml.Html.SELECT);
		writer.attribute(Xhtml.Attr.NAME, getFetchSizeProperty());
		writer.attribute(Xhtml.Attr.ONCHANGE, getJSTaglibPagerGoToPageDefine("", 1));
		for (int i = 0; i < fetchSizeVector.size(); i++) {
			String value = (String) fetchSizeVector.get(i);
			writer.startElement(Xhtml.Html.OPTION);
			if (value.equals(fetchSizeStr)) {
				writer.attribute(Xhtml.Attr.SELECTED, PagerConstant.TRUE);
			}
			writer.text(value);
			writer.endElement(Xhtml.Html.OPTION);
		}
		writer.endElement(Xhtml.Html.SELECT);
	}

	/**
	 * 
	 */
	protected void initPager() {
	}

}