PC Plus SuperCD (UK) 1999 September/pcp155a.iso/linux/ldp/FolderData.class

Java Class File | 1999-05-02 | 5.4 KB | 196 lines

import java.applet.Applet;
import java.awt.Image;
import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

public class FolderData {
   private Applet theApplet;
   private String dataFile = "";
   private Folder rootFolder;
   private String defaultTarget;
   private Image defaultRoot;
   private Image defaultNode;
   private Image defaultOpen;
   private Image defaultClosed;
   private static final String OPENER = "<";
   private static final String CLOSER = ">";
   private String buffer = "";

   public FolderData(String dataFile, Image defaultRoot, Image defaultNode, Image defaultOpen, Image defaultClosed, String defaultTarget, Applet theApplet) {
      this.dataFile = dataFile;
      this.defaultRoot = defaultRoot;
      this.defaultNode = defaultNode;
      this.defaultOpen = defaultOpen;
      this.defaultClosed = defaultClosed;
      this.defaultTarget = defaultTarget;
      this.theApplet = theApplet;
      DataInputStream in = this.openDataFile(this.dataFile);
      String tag = "";

      while((tag = this.readSegment(in)) != null) {
         if (tag.equals("<FOLDER>")) {
            this.readFolder(in, (Folder)null);
         }
      }

      this.getRootFolder().setOpen(true);
   }

   private void readFolder(DataInputStream in, Folder parent) {
      String tag = "";
      boolean closedIconGiven = false;
      boolean openIconGiven = false;
      Folder f1 = new Folder(parent);
      f1.setIconOpen(this.defaultNode);
      f1.setIconClosed(this.defaultNode);
      f1.setTarget(this.defaultTarget);

      for(String var7 = this.readSegment(in); var7 != null && !var7.equals("</FOLDER>"); var7 = this.readSegment(in)) {
         if (var7.equals("<HREF>")) {
            f1.setHRef(this.createURL(this.readSimpleField(in, "HREF")));
         } else if (var7.equals("<TEXT>")) {
            f1.setText(this.readSimpleField(in, "TEXT"));
         } else if (var7.equals("<ICONOPEN>")) {
            f1.setIconOpen(this.theApplet.getImage(this.theApplet.getDocumentBase(), this.readSimpleField(in, "ICONOPEN")));
            openIconGiven = true;
         } else if (var7.equals("<ICON>")) {
            f1.setIconClosed(this.theApplet.getImage(this.theApplet.getDocumentBase(), this.readSimpleField(in, "ICON")));
            closedIconGiven = true;
         } else if (var7.equals("<FOLDER>")) {
            if (!openIconGiven) {
               f1.setIconOpen(this.defaultOpen);
            }

            if (!closedIconGiven) {
               f1.setIconClosed(this.defaultClosed);
            }

            this.readFolder(in, f1);
         } else if (var7.equals("<TARGET>")) {
            f1.setTarget(this.readSimpleField(in, "TARGET"));
         } else if (var7.equals("<WARNING>")) {
            f1.setWarning(this.readSimpleField(in, "WARNING"));
         } else if (var7.equals("<NOJAVA>")) {
            this.readSimpleField(in, "NOJAVA");
         } else {
            this.alert(String.valueOf("Unknown text/tag: ").concat(String.valueOf(var7)));
         }
      }

      if (parent == null) {
         this.rootFolder = f1;
         this.rootFolder.setIconOpen(this.defaultRoot);
         this.rootFolder.setIconClosed(this.defaultRoot);
      }

   }

   private URL createURL(String u) {
      URL createURL = null;
      if (u != null) {
         try {
            createURL = new URL(this.theApplet.getDocumentBase(), u);
         } catch (MalformedURLException var4) {
            System.out.println(String.valueOf("Bad URL: ").concat(String.valueOf(u)));
            createURL = null;
         }
      }

      return createURL;
   }

   public Folder getRootFolder() {
      return this.rootFolder;
   }

   private String readSimpleField(DataInputStream in, String field) {
      String tag = "";
      String text = "";

      for(String var5 = this.readSegment(in); var5 != null && !var5.equals(String.valueOf(String.valueOf("</").concat(String.valueOf(field))).concat(String.valueOf(">"))); var5 = this.readSegment(in)) {
         if (var5.startsWith("<")) {
            this.alert(String.valueOf(String.valueOf(String.valueOf("Error found this in ").concat(String.valueOf(field))).concat(String.valueOf(" tag: "))).concat(String.valueOf(var5)));
         } else {
            text = String.valueOf(text).concat(String.valueOf(var5));
         }
      }

      return text;
   }

   private DataInputStream openDataFile(String dataFile) {
      DataInputStream in = null;

      try {
         URL fileURL = new URL(this.theApplet.getDocumentBase(), dataFile);
         in = new DataInputStream(new BufferedInputStream(fileURL.openStream()));
      } catch (IOException e) {
         this.alert(String.valueOf(String.valueOf(String.valueOf("Cannot open ").concat(String.valueOf(dataFile))).concat(String.valueOf(": "))).concat(String.valueOf(((Throwable)e).getMessage())));
      }

      return in;
   }

   public String readSegment(DataInputStream in) {
      String temp = "";
      String temp2 = "";
      String text = "";
      if (!this.buffer.equals("")) {
         temp = this.buffer;
      } else {
         try {
            temp = in.readLine();
         } catch (IOException e) {
            this.alert(String.valueOf("IOException: ").concat(String.valueOf(((Throwable)e).getMessage())));
         }

         if (temp == null) {
            return temp;
         }
      }

      int pos1 = temp.indexOf("<");
      int pos2 = temp.indexOf(">");
      if (pos1 == -1) {
         this.buffer = "";
         text = temp;
      } else {
         if (pos2 == -1) {
            for(String var10 = " "; !var10.equals("") && pos2 == -1; pos2 = temp.indexOf(">")) {
               try {
                  var10 = in.readLine();
                  temp = String.valueOf(String.valueOf(temp).concat(String.valueOf(" "))).concat(String.valueOf(var10));
               } catch (IOException e) {
                  this.alert(String.valueOf("IOException: ").concat(String.valueOf(((Throwable)e).getMessage())));
               }
            }

            if (pos2 == -1) {
               this.alert("No closing '>' on line");
            }
         }

         if (pos1 == 0) {
            text = temp.substring(0, pos2 + ">".length()).toUpperCase();
            this.buffer = temp.substring(pos2 + ">".length());
         } else {
            text = temp.substring(0, pos1);
            this.buffer = temp.substring(pos1);
         }
      }

      if (text.startsWith("<?") || text.startsWith("<!")) {
         text = "";
      }

      return text.trim();
   }

   private void alert(String msg) {
      this.theApplet.showStatus(msg);
   }
}