Tag clouds: Hiding "uncategorized" category if no uncategorized tags exist

[prawokultury.git] / menu / helpers.py

diff --git a/menu/helpers.py b/menu/helpers.py
index e94cbd8..33e90b7 100755 (executable)
--- a/menu/helpers.py
+++ b/menu/helpers.py
@@ -1,18 +1,32 @@
 class MenuItem(object):
     html_id = None
 
+    class InvalidMenuItem(BaseException):
+        pass
+
     def __init__(self, url, title, html_id=None, more_urls=None):
         self.url = url
         self.title = title
         self.html_id = html_id
         self.more_urls = more_urls or set()
 
+    def is_valid(self):
+        return True
+
     def is_active(self, request, value):
         url = request.get_full_path()
-        return url == str(self.url) or url in set(str(url) for url in self.more_urls)
+        if url.startswith(str(self.url)):
+            return True
+        for other_url in self.more_urls:
+            if url.startswith(str(other_url)):
+                return True
+        return False
 
     def check_active(self, request, value):
-        self.active = self.is_active(request, value)
+        try:
+            self.active = self.is_active(request, value)
+        except self.InvalidMenuItem, e:
+            pass
 
     def get_url(self):
         return self.url
@@ -27,25 +41,40 @@ class ObjectMenuItem(MenuItem):
     If no url or title is provided, get_absolute_url and __unicode__ are used.
     You can also provide a reverse lookup dictionary, as in {model: field_name}.
     """
-    def __init__(self, obj, url=None, rev_lookups=None, title=None, html_id=None):
+    def __init__(self,
+            obj=None, obj_get=None,
+            url=None, rev_lookups=None, title=None, html_id=None):
         super(ObjectMenuItem, self).__init__(url=url, title=title, html_id=html_id)
         self.obj = obj
+        self.obj_get = obj_get
         self.rev_lookups = rev_lookups
 
+    def get_object(self):
+        try:
+            return self.obj or self.obj_get()
+        except BaseException, e:
+            raise self.InvalidMenuItem(e)
+
     def get_title(self):
-        return self.title or unicode(self.obj)
+        return self.title or unicode(self.get_object())
 
-    @property
     def get_url(self):
-        return self.url or self.obj.get_absolute_url()
+        return self.url or self.get_object().get_absolute_url()
+
+    def is_valid(self):
+        try:
+            obj = self.get_object()
+        except self.InvalidMenuItem, e:
+            return False
+        return True
 
     def is_active(self, request, value):
-        if value == self.obj:
+        if value == self.get_object():
             return True
         if self.rev_lookups:
             for model, manager in self.rev_lookups.items():
                 if (isinstance(value, model) and 
-                        self.obj in getattr(value, manager).all()):
+                        self.get_object() in getattr(value, manager).all()):
                     return True
         return False