package net.sf.jabref.external;

 import java.io.IOException;

 import java.io.InputStream;

 import javax.swing.*;

 import net.sf.jabref.*;

 import com.jgoodies.forms.builder.DefaultFormBuilder;

 import com.jgoodies.forms.layout.FormLayout;

 /**

  * Created by IntelliJ IDEA.

  * User: alver

  * Date: Jan 14, 2006

  * Time: 4:55:23 PM

  * To change this template use File | Settings | File Templates.

  */

 public class PushToEmacs implements PushToApplication {

     private JPanel settings = null;

     private JTextField citeCommand = new JTextField(30);

     private boolean couldNotConnect=false, couldNotRunClient=false;

     public String getName() {

         return Globals.menuTitle("Insert selected citations into Emacs") ;

     }

     public String getApplicationName() {

         return "Emacs";

     }

     public String getTooltip() {

         return Globals.lang("Push selection to Emacs");

     }

     public Icon getIcon() {

         return GUIGlobals.getImage("emacs");

     }

     public String getKeyStrokeName() {

         return "Push to Emacs";

     }

     public JPanel getSettingsPanel() {

         if (settings == null)

             initSettingsPanel();

         citeCommand.setText(Globals.prefs.get("citeCommandEmacs"));

         return settings;

     }

     public void storeSettings() {

         Globals.prefs.put("citeCommandEmacs", citeCommand.getText());

     }

     private void initSettingsPanel() {

         DefaultFormBuilder builder = new DefaultFormBuilder(

                 new FormLayout("left:pref, 4dlu, fill:pref", ""));

         builder.append(Globals.lang("Cite command") + ":");

         builder.append(citeCommand);

         settings = builder.getPanel();

     }

     public void pushEntries(BibtexDatabase database, BibtexEntry[] entries, String keys, MetaData metaData) {

         couldNotConnect=false;

         couldNotRunClient=false;

         try {

             String[] com = Globals.ON_WIN ?

                 // Windows gnuclient escaping:

                 // java string: "(insert \\\"\\\\cite{Blah2001}\\\")";

                 // so cmd receives: (insert \"\\cite{Blah2001}\")

                 // so emacs receives: (insert "\cite{Blah2001}")

                 new String[] {"gnuclient", "-qe",

                 "(insert \\\"\\\\" + Globals.prefs.get("citeCommandEmacs").replaceAll("\\\\", "\\\\\\\\") +

                         "{" + keys + "}\\\")"}

             :

                 // Linux gnuclient escaping:

                 // java string: "(insert \"\\\\cite{Blah2001}\")"

                 // so sh receives: (insert "\\cite{Blah2001}")

                 // so emacs receives: (insert "\cite{Blah2001}")

                 new String[] {"gnuclient", "-batch", "-eval",

                 "(insert \"" + Globals.prefs.get("citeCommandEmacs").replaceAll("\\\\", "\\\\\\\\") +

                        "{" + keys + "}\")"};

             final Process p = Runtime.getRuntime().exec(com);

             Runnable errorListener = new Runnable() {

                 public void run() {

                     InputStream out = p.getErrorStream();

                     int c;

                     StringBuffer sb = new StringBuffer();

                     try {

                         while ((c = out.read()) != -1)

                             sb.append((char) c);

                     } catch (IOException e) {

                         e.printStackTrace();

                     }

                     // Error stream has been closed. See if there were any errors:

                     if (sb.toString().trim().length() > 0) {

                         System.out.println(sb.toString());

                         couldNotConnect = true;

                         return;

                     }

                 }

             };

             Thread t = new Thread(errorListener);

             t.start();

             t.join();

         }

         catch (IOException excep) {

             couldNotRunClient = true;

             return;

         } catch (InterruptedException e) {

             e.printStackTrace();

         }

     }

     public void operationCompleted(BasePanel panel) {

         if (couldNotConnect)

             JOptionPane.showMessageDialog(

                 panel.frame(),

                 "<HTML>"+

                 Globals.lang("Could not connect to a running gnuserv process. Make sure that "

                 +"Emacs or XEmacs is running,<BR>and that the server has been started "

                 +"(by running the command 'gnuserv-start').")

                 +"</HTML>",

                 Globals.lang("Error"), JOptionPane.ERROR_MESSAGE);

         else if (couldNotRunClient)

             JOptionPane.showMessageDialog(

                 panel.frame(),

                 Globals.lang("Could not run the 'gnuclient' program. Make sure you have "

                 +"the gnuserv/gnuclient programs installed."),

                 Globals.lang("Error"), JOptionPane.ERROR_MESSAGE);

         else {

             panel.output(Globals.lang("Pushed citations to Emacs"));

         }

     }

     public boolean requiresBibtexKeys() {

         return true;

     }

 }