Installer.java

package ij.plugin;
import ij.*;
import ij.gui.*;
import ij.io.*;
import ij.util.*;
import java.awt.*;
import java.io.*;
import java.util.*;
import java.lang.reflect.*;

public class Installer implements PlugIn {

    private static String[] menus = {"Shortcuts", "Plugins", "Import", "Save As",
        "Filters", "Tools", "Utilities"};
    private static final String TITLE = "Installer";
    private static String command = "";
    private static String shortcut = "";
    private static String defaultPlugin = "";
    private static String menuStr = menus[0];

    public void run(String arg) {
        installPlugin();
    }

    void installPlugin() {
        String[] plugins = getPlugins();
        if (plugins==null || plugins.length==0) {
            IJ.error("No plugins found");
            return;
        }
        GenericDialog gd = new GenericDialog("Install Plugin", IJ.getInstance());
        gd.addChoice("Plugin:", plugins, defaultPlugin);
        gd.addChoice("Menu:", menus, menuStr);
        gd.addStringField("Command:", command, 16);
        gd.addStringField("Shortcut:", shortcut, 3);
        gd.addStringField("Argument:", "", 12);
        gd.showDialog();
        if (gd.wasCanceled())
            return;
        String plugin = gd.getNextChoice();
        menuStr = gd.getNextChoice();
        command = gd.getNextString();
        shortcut = gd.getNextString();
        String argument = gd.getNextString();
        IJ.register(Installer.class);
        defaultPlugin = plugin;
        if (command.equals("")) {
            IJ.showMessage(TITLE, "Command required");
            return;
        }
        if (shortcut.length()>1)
            shortcut = shortcut.replace('f','F');
        char menu = ' ';
        if (menuStr.equals(menus[0]))
            menu = Menus.SHORTCUTS_MENU;
        else if (menuStr.equals(menus[1]))
            menu = Menus.PLUGINS_MENU;
        else if (menuStr.equals(menus[2]))
            menu = Menus.IMPORT_MENU;
        else if (menuStr.equals(menus[3]))
            menu = Menus.SAVE_AS_MENU;
        else if (menuStr.equals(menus[4]))
            menu = Menus.FILTERS_MENU;
        else if (menuStr.equals(menus[5]))
            menu = Menus.TOOLS_MENU;
        else if (menuStr.equals(menus[6]))
            menu = Menus.UTILITIES_MENU;
        if (!argument.equals(""))
            plugin += "(\"" + argument +"\")";
        int err = Menus.installPlugin(plugin,menu,command,shortcut,IJ.getInstance());
        switch (err) {
            case Menus.COMMAND_IN_USE:
                IJ.showMessage(TITLE, "The command \""+command+"\" \nis already being used.");
                return;
            case Menus.INVALID_SHORTCUT:
                IJ.showMessage(TITLE, "The shortcut must be a single character or \"F1\"-\"F12\".");
                return;
            case Menus.SHORTCUT_IN_USE:
                IJ.showMessage("The \""+shortcut+"\" shortcut is already being used.");
                return;
            default:
                command = "";
                shortcut = "";
                break;
        }
        if (!plugin.endsWith(")"))
            installAbout(plugin);
    }
    
    void installAbout(String plugin) {
        boolean hasShowAboutMethod=false;
        PluginClassLoader loader = new PluginClassLoader(Menus.getPlugInsPath());
        try {
            Class c = loader.loadClass(plugin);
            Method m = c.getDeclaredMethod("showAbout", new Class[0]);
            if (m!=null)
                hasShowAboutMethod = true;
        }
        catch (Exception e) {}
        //IJ.write("installAbout: "+plugin+" "+hasShowAboutMethod);
        if (hasShowAboutMethod)
            Menus.installPlugin(plugin+"(\"about\")",Menus.ABOUT_MENU,plugin+"...","",IJ.getInstance());
    }
    
    String[] getPlugins() {
        String path = Menus.getPlugInsPath();
        if (path==null)
            return null;
        File f = new File(path);
        String[] list = f.list();
        if (list==null) return null;
        Vector v = new Vector();
        for (int i=0; i<list.length; i++) {
            String className = list[i];
            boolean isClassFile = className.endsWith(".class");
            if (className.indexOf('_')>=0 && isClassFile && className.indexOf('$')<0 ) {
                className = className.substring(0, className.length()-6); 
                v.addElement(className);
            } else {
                if (!isClassFile)
                    getSubdirectoryPlugins(path, className, v);
            }
        }
        list = new String[v.size()];
        v.copyInto((String[])list);
        StringSorter.sort(list);
        return list;
    }
    
    void getSubdirectoryPlugins(String path, String dir, Vector v) {
        //IJ.write("getSubdirectoryPlugins: "+path+dir);
        if (dir.endsWith(".java"))
            return;
        File f = new File(path, dir);
        if (!f.isDirectory())
            return;
        String[] list = f.list();
        if (list==null)
            return;
        dir += "/";
        for (int i=0; i<list.length; i++) {
            String name = list[i];
            if (name.indexOf('_')>=0 && name.endsWith(".class") && name.indexOf('$')<0 ) {
                name = name.substring(0, name.length()-6); // remove ".class"
                v.addElement(name);
                //IJ.write("File: "+f+"/"+name);
            }
        }
    }

}