disable the webui plugin settings and display an error message when deluge-web is missing

deluge/plugins/webui/webui/core.py

@@ -43,8 +43,6 @@ from deluge.log import LOG as log
 from deluge.plugins.pluginbase import CorePluginBase
 from deluge.core.rpcserver import export
 
-from deluge.ui.web import server
-
 DEFAULT_PREFS = {
     "enabled": False,
     "ssl": False,
@@ -76,13 +74,28 @@ class Core(CorePluginBase):
     def on_stop(self, *args):
         self.start()
 
+    @export
+    def got_deluge_web(self):
+        try:
+            from deluge.ui.web import server
+            return True
+        except ImportError:
+            return False
+    
     @export
     def start(self):
         if not self.server:
+            try:
+                from deluge.ui.web import server
+            except ImportError:
+                return False
+
             self.server = server.DelugeWeb()
+
         self.server.port = self.config["port"]
         self.server.https = self.config["ssl"]
         self.server.start(False)
+        return True
     
     @export
     def stop(self):
@@ -107,11 +120,11 @@ class Core(CorePluginBase):
         self.config.save()
         
         if action == 'start':
-            self.start()
+            return self.start()
         elif action == 'stop':
-            self.stop()
+            return self.stop()
         elif action == 'restart':
-            self.restart()
+            return self.restart()
 
     @export
     def get_config(self):

deluge/plugins/webui/webui/gtkui.py

@@ -54,6 +54,7 @@ class GtkUI(GtkPluginBase):
         component.get("PluginManager").register_hook("on_apply_prefs", self.on_apply_prefs)
         component.get("PluginManager").register_hook("on_show_prefs", self.on_show_prefs)
         client.webui.get_config().addCallback(self.cb_get_config)
+        client.webui.got_deluge_web().addCallback(self.cb_chk_deluge_web)
 
     def disable(self):
         component.get("Preferences").remove_page("WebUi")
@@ -61,6 +62,8 @@ class GtkUI(GtkPluginBase):
         component.get("PluginManager").deregister_hook("on_show_prefs", self.on_show_prefs)
 
     def on_apply_prefs(self):
+        if not self.have_web:
+            return
         log.debug("applying prefs for WebUi")
         config = {
             "enabled": self.glade.get_widget("enabled_checkbutton").get_active(),
@@ -77,3 +80,26 @@ class GtkUI(GtkPluginBase):
         self.glade.get_widget("enabled_checkbutton").set_active(config["enabled"])
         self.glade.get_widget("ssl_checkbutton").set_active(config["ssl"])
         self.glade.get_widget("port_spinbutton").set_value(config["port"])
+    
+    def cb_chk_deluge_web(self, have_web):
+        self.have_web = have_web
+        if have_web:
+            return
+        self.glade.get_widget("settings_vbox").set_sensitive(False)
+
+        vbox = self.glade.get_widget("prefs_box")
+
+        hbox = gtk.HBox()
+        icon = gtk.image_new_from_stock(gtk.STOCK_DIALOG_ERROR, gtk.ICON_SIZE_SMALL_TOOLBAR)
+        icon.set_padding(5, 5)
+        hbox.pack_start(icon, False, False)
+
+        label = gtk.Label(_("The Deluge web interface is not installed, "
+            "please install the\ninterface and try again"))
+        label.set_alignment(0, 0.5)
+        label.set_padding(5, 5)
+        hbox.pack_start(label)
+
+        vbox.pack_start(hbox, False, False, 10)
+        vbox.reorder_child(hbox, 0)
+        vbox.show_all()