simplemenudisplayer.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

/*
 * SimpleMenuDisplayer.java
 *
 * Created on February 15, 2001, 11:14 AM
 */
package net.sf.navigator.displayer;

import net.sf.navigator.menu.MenuComponent;

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


/**
 *
 * @author  ssayles
 * @version
 */
public class SimpleMenuDisplayer extends MessageResourcesMenuDisplayer {
    //~ Static fields/initializers =============================================

    protected static final String nbsp = NBSP;

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

    public void init(PageContext pageContext, MenuDisplayerMapping mapping) {
        super.init(pageContext, mapping);

        try {
            out.println(displayStrings.getMessage("smd.style"));
        } catch (Exception e) {
            log.error(e.getMessage());
        }
    }

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

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

        if (components.length > 0) {
            out.println(displayStrings.getMessage("smd.menu.item.top",
                    getSpace(level) +
                    displayStrings.getMessage("smd.menu.item.image.bullet") +
                    getMessage(menu.getTitle())));

            for (int i = 0; i < components.length; i++) {
                if (components[i].getMenuComponents().length > 0) {
                    if (isAllowed(components[i])) {
                        displayComponents(components[i], level + 1);
                    }
                } else {
                    if (isAllowed(components[i])) {
                        out.println(displayStrings.getMessage("smd.menu.item",
                                    components[i].getUrl(),
                                    super.getMenuTarget(components[i]),
                                    super.getMenuToolTip(components[i]),
                                    this.getSpace(level + 1) + getImage(components[i]) +
                                    this.getMessage(components[i].getTitle())));
                    }
                }
            }
        } else {
            out.println(displayStrings.getMessage("smd.menu.item",
                    menu.getUrl(), super.getMenuTarget(menu),
                    super.getMenuToolTip(menu),
                    this.getSpace(level) + getImage(menu) +
                    getMessage(menu.getTitle())));
        }
    }

    protected String getSpace(int length) {
        String space = EMPTY;

        for (int i = 0; i < length; i++) {
            space = space + nbsp + nbsp;
        }

        return space;
    }

    protected String getImage(MenuComponent menu) {
        String imageTag;

        if ((menu.getImage() == null) || (menu.getImage().equals(EMPTY))) {
            imageTag = EMPTY;
        } else {
            imageTag =
                displayStrings.getMessage("smd.menu.item.image",
                    menu.getImage(), super.getMenuToolTip(menu));
        }

        return imageTag;
    }
}