Application: gvSIG desktop » gvSIG scripting

package javax.help;

import java.io.File;

import java.lang.reflect.Field;

import java.net.URL;

import javax.help.event.HelpModelEvent;

import javax.help.event.HelpModelListener;

import org.apache.commons.io.FilenameUtils;

import org.gvsig.scripting.ScriptingHelpManager;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

public class ScriptingHelpModel extends DefaultHelpModel {

    private static final Logger logger = LoggerFactory.getLogger(ScriptingHelpModel.class);

    private final ScriptingHelpManager helpManager;

    private Field currentURLField = null;

    public ScriptingHelpModel(HelpSet hs, ScriptingHelpManager helpManager) {

        super(hs);

        this.helpManager = helpManager;

    }

    @Override

    protected void fireIDChanged(Object source, Map.ID id, URL url, String historyName, JHelpNavigator navigator) {

        if (url != null && "file".equalsIgnoreCase(url.getProtocol())) {

            if (id == null) {

                url = helpManager.makeURL(null, url);

                this.setTheCurrentURL(url);

            } else {

                URL baseUrl = id.getHelpSet().getHelpSetURL();

                if ("file".equalsIgnoreCase(baseUrl.getProtocol()) ) {

                    url = helpManager.makeURL(

                            new File(FilenameUtils.getFullPath(baseUrl.getPath())),

                            url

                    );

                    this.setTheCurrentURL(url);

                }

            }

        }

        Object[] listeners = listenerList.getListenerList();

        HelpModelEvent e = null;

        for (int i = listeners.length - 2; i >= 0; i -= 2) {

            if (listeners[i] == HelpModelListener.class) {

                if (e == null) {

                    e = new HelpModelEvent(source, id, url, historyName, navigator);

                }

                ((HelpModelListener) listeners[i + 1]).idChanged(e);

            }

        }

    }

    private void setTheCurrentURL(URL url) {

        try {

            if( this.currentURLField==null ) {

                this.currentURLField = DefaultHelpModel.class.getDeclaredField("currentURL");

                this.currentURLField.setAccessible(true);

            }

            this.currentURLField.set(this, url);

        } catch (Exception ex) {

            logger.warn("Can't change currentURL", ex);

        }

    }

}