add property pass-through support, directly check on Snark's completion

src/java/com/threerings/getdown/launcher/GetdownApplet.java

@@ -98,6 +98,15 @@ public class GetdownApplet extends JApplet
             return;
         }
 
+        // Pass through properties parameter.
+        String[] properties = getParameter("properties").split(" ");
+        for (String property : properties) {
+            String key = property.substring(property.indexOf("-D") + 2,
+                property.indexOf("="));
+            String value = property.substring(property.indexOf("=") + 1);
+            System.setProperty(key, value);
+        }
+
         // when run from an applet, we install 
         String root;
         if (RunAnywhere.isWindows()) {

src/java/com/threerings/getdown/launcher/TorrentDownloader.java

@@ -85,7 +85,7 @@ public class TorrentDownloader extends Downloader
         // Override the start time, since Snark allocates storage prior to
         // doing any downloading
         _start = System.currentTimeMillis();
-        while (_currentSize != snark.meta.getTotalLength()) {
+        while (!snark.coordinator.completed()) {
             long now = System.currentTimeMillis();
             if ((now - _lastUpdate) >= UPDATE_DELAY) {
                 _currentSize = snark.coordinator.getDownloaded();
@@ -106,6 +106,10 @@ public class TorrentDownloader extends Downloader
             }
             updateObserver();
         }
+        // Manually set completion, just to be extra-safe.
+        _currentSize = _totalSize;
+        updateObserver();
+
         if (snarkStopper != null) {
             snarkStopper.run();
             Runtime.getRuntime().removeShutdownHook(snarkStopper);