listmenudisplayer.java

文件树形浏览文件树形浏览文件树形浏览文件树形浏览文件树形浏览文件树形浏览文件树形浏览文件树形浏览

/*
 * ListMenuDisplayer.java
 *
 * Created on December 7, 2002, 12:35 AM
 */
package net.sf.navigator.displayer;

import net.sf.navigator.menu.MenuComponent;
import org.apache.commons.lang.StringUtils;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.PageContext;
import java.io.IOException;


/**
 *
 * @author  <a href="mailto:[e-mail]">Matt Raible</a>
 * @version 1.0
 */
public class ListMenuDisplayer extends MessageResourcesMenuDisplayer {
    //~ Instance fields ========================================================

    //~ Methods ================================================================

    public void init(PageContext pageContext, MenuDisplayerMapping mapping) {
        super.init(pageContext, mapping);
        String id = (String) pageContext.getAttribute("menuId");

        try {
            out.println(displayStrings.getMessage("lmd.begin",
                (id != null) ?  "id=\"" + id + "\" " : ""));
        } catch (Exception e) {
            log.error(e.getMessage());
        }
    }

    public void display(MenuComponent menu) throws JspException, IOException {
        if (isAllowed(menu)) {
            out.println(displayStrings.getMessage("lmd.menu.top"));
            displayComponents(menu, 0);
            out.println(displayStrings.getMessage("lmd.menu.bottom"));
        }
    }

    protected void displayComponents(MenuComponent menu, int level)
    throws JspException, IOException {
        MenuComponent[] components = menu.getMenuComponents();

        if (components.length > 0) {
            // eliminate spaces in string used for Id
            String domId = StringUtils.deleteWhitespace(getMessage(menu.getName()));
            // added to create a unique id everytime
            domId += ((int) (1000*Math.random()));

            String menuClass = "menu";

            if (level >= 1) {
                menuClass = "submenu";
            }

            // if there is a location/page/action tag on base item use it
            if (menu.getUrl() != null ){
                out.println(displayStrings.getMessage("lmd.menu.actuator.link",
                            domId, getMessage(menu.getTitle()), menuClass,
                            getMessage(menu.getUrl())));
            } else {
                out.println(displayStrings.getMessage("lmd.menu.actuator.top",
                        domId,
                        getMessage(menu.getTitle()),
                        menuClass));
            }
            
            for (int i = 0; i < components.length; i++) {
                // check the permissions on this component
                if (isAllowed(components[i])) {
                    if (components[i].getMenuComponents().length > 0) {
                        out.println("<li>");

                        displayComponents(components[i], level + 1);

                        out.println(displayStrings.getMessage("lmd.menu.actuator.bottom"));
                    } else {
                        out.println(displayStrings.getMessage("lmd.menu.item",
                                                              components[i].getUrl(),
                                                              super.getMenuToolTip(components[i]),
                                                              getExtra(components[i]),
                                                              this.getMessage(components[i].getTitle())));
                    }
                }
            }

            // close the </ul> for the top menu
            if (menuClass.equals("menu")) {
                out.println("</ul>");
            }
        } else {
            if (menu.getParent() == null) {
                out.println(displayStrings.getMessage("lmd.menu.standalone",
                                                      menu.getUrl(),
                                                      super.getMenuToolTip(menu),
                                                      getExtra(menu),
                                                      getMessage(menu.getTitle())));
            } else {
                out.println(displayStrings.getMessage("lmd.menu.item",
                                                      menu.getUrl(),
                                                      super.getMenuToolTip(menu),
                                                      getExtra(menu),
                                                      getMessage(menu.getTitle())));
            }
        }
    }

    /**
     * This will output the ending HTML code to close tags from the beginning
     * @param context the current pageContext
     */
    public void end(PageContext context) {
        try {
            out.print(displayStrings.getMessage("lmd.end"));
        } catch (Exception e) {
            log.error(e.getMessage());
        }
    }

    public String getExtra(MenuComponent menu) {
        StringBuffer extra = new StringBuffer();
        if (menu.getTarget() != null) {
            extra.append(" target=\"").append(menu.getTarget()).append("\"");
        }
        if (menu.getOnclick() != null) {
            extra.append(" onclick=\"").append(menu.getOnclick()).append("\"");
        }
        if (menu.getOnmouseover() != null) {
            extra.append(" onmouseover=\"").append(menu.getOnmouseover()).append("\"");
        }
        if (menu.getOnmouseout() != null) {
            extra.append(" onmouseout=\"").append(menu.getOnmouseout()).append("\"");
        }
        if (menu.getWidth() != null) {
            extra.append(" style=\"width: " + menu.getWidth() + "px\"");
        }
        return (extra.length() > 0) ? extra.toString() : "";
    }
}