save plugin state on plugin enable/disable, instead of on shutdown. remembers active plugins in case of a crash

ChangeLog

@@ -4,6 +4,7 @@ Deluge 0.5.7 (xx November 2007)
   list or wrong type
   * Local discovery of peers
   * Add torrent in paused state option
+  * Fix bug where loaded plugins were forgotten if Deluge crashed
   * Fix ratio bugs (hopefully for the last time)
   * Scheduler plugin revamp by Ben Klein
   * Fix ETA from going backwards

src/interface.py

@@ -1662,9 +1662,6 @@ want to remove all seeding torrents?")):
         self.save_column_widths()
         self.save_window_settings()
         self.save_tabs_order()
-        enabled_plugins = ':'.join(self.plugins.get_enabled_plugins())
-        self.config.set('enabled_plugins', enabled_plugins)
-        self.config.save()
         self.plugins.shutdown_all_plugins()
         #for the sake of windows, hide tray_icon
         self.tray_icon.set_visible(False)

src/plugins.py

@@ -74,6 +74,9 @@ class PluginManager:
     def enable_plugin(self, name):
         plugin = self.available_plugins[name]
         self.enabled_plugins[name] = plugin.enable(self.core, self.interface)
+        enabled_plugins = ':'.join(self.get_enabled_plugins())
+        self.interface.config.set('enabled_plugins', enabled_plugins)
+        self.interface.config.save()
 
     def get_enabled_plugins(self):
         return self.enabled_plugins.keys()
@@ -83,7 +86,10 @@ class PluginManager:
         if 'unload' in dir(plugin):
             plugin.unload()
         del self.enabled_plugins[name]
-        
+        enabled_plugins = ':'.join(self.get_enabled_plugins())
+        self.interface.config.set('enabled_plugins', enabled_plugins)
+        self.interface.config.save()
+
     def configurable_plugin(self, name):
         if name in self.enabled_plugins:
             return 'configure' in dir(self.enabled_plugins[name])