package gboat2.base.view.components;
   
   import java.io.Writer;
   
   import javax.servlet.http.HttpServletRequest;
   import javax.servlet.http.HttpServletResponse;
   
   import org.apache.commons.lang3.RandomStringUtils;
   import org.apache.commons.lang3.StringUtils;
  import org.apache.struts2.components.ClosingUIBean;
  import org.apache.struts2.views.annotations.StrutsTag;
  import org.apache.struts2.views.annotations.StrutsTagAttribute;
  import org.springframework.util.Assert;
  
  import com.opensymphony.xwork2.util.ValueStack;
  
  /**
   * 创建 jquery-ui tab 控件
   * <p>
   * 示例代码：
   * </p>
   * <p/>
   * <pre>
   * &lt;g2:tab href="#t2" closable="true"&gt;显示Div中的内容&lt;/g2:tab&gt;
   * &lt;div id="t2"&gt;这个 DIV 的内容将显示在 Tab 中&lt;/div&gt;
   * 
   * &lt;g2:tab id="tab32" href="none/example.action?forward=ajax/ajax1" formIds="form_3"&gt;Ajax加载&lt;/g2:tab&gt;
   * &lt;g2:form id="form_3"&gt;
   *     &lt;g2:textfield name="test" value="hello" label="测试"/&gt;
   * &lt;/g2:form&gt;
   * </pre>
   * <p/>
   * 
   * @date 2014年5月24日
   * @author <a href="mailto:[email protected]">何明旺</a>
   * @since 3.0.0-SNAPSHOT
   * @see TabbedPanel
   */
  @StrutsTag(
          name = "tab",
          tldTagClass = "gboat2.base.view.jsp.TabTag",
          description = "创建 jquery-ui tab 控件",
          allowDynamicAttributes = true)
  public class Tab extends ClosingUIBean {
  
      public static final String TEMPLATE = "tab";
      public static final String TEMPLATE_CLOSE = "tab-close";
  
      protected String closable;
      protected String formIds;
      protected String href;
      
      public Tab(ValueStack stack, HttpServletRequest request, HttpServletResponse response) {
          super(stack, request, response);
      }
  
      @Override
      public String getDefaultOpenTemplate() {
          return TEMPLATE;
      }
  
      @Override
      public String getDefaultTemplate() {
          return TEMPLATE_CLOSE;
      }
      
      @Override
      public void evaluateExtraParams() {
          super.evaluateExtraParams();
  
          TabbedPanel tabbedPanel = (TabbedPanel) findAncestor(TabbedPanel.class);
          Assert.notNull(tabbedPanel, "<g2:tab> 标签必须位于 <g2:tabbedpanel> 标签中！");
          addParameter("tabbedPanelId", tabbedPanel.getId());
          
          if (closable != null)
              addParameter("closable", findValue(closable, Boolean.class));
          
          if (formIds != null)
              addParameter("formIds", findString(formIds));
  
          if (href != null)
              addParameter("href", findString(href));
          
          if (StringUtils.isBlank(id)) {
              this.id = "tab_" + RandomStringUtils.randomNumeric(3);
              addParameter("id", this.id);
          }
      }
  
      @Override
      public boolean end(Writer writer, String body) {
          return super.end(writer, StringUtils.defaultIfBlank(body, label));
      }
  
      @StrutsTagAttribute(description = "是否可以关闭", type = "Boolean", defaultValue = "false")
      public void setClosable(String closable) {
          this.closable = closable;
      }
  
     @StrutsTagAttribute(name = "formIds", description = "在发起 ajax 请求时，会序列化 id 为该值的表单中所有表单域作为请求参数，多个表单 id 之间用逗号分隔")
     public void setFormIds(String formIds) {
         this.formIds = formIds;
     }
 
     @StrutsTagAttribute(description = "Tab 页显示内容对应的锚链接或 ajax 请求地址，如： #div1 或 /ajax.do", required = true)
     public void setHref(String href) {
         this.href = href;
     }
 }