Replaces always disabled context selection link

In the context selection dropdown, there is currently an always disabled
link to do more advanced filtering. The original intent was to open a
modal to do more advanced context selection. With the use of RBAC in a
previous bp, the Identity->Projects panel is always accessible. This
panel provides the entire project list for the user. We can just use
this to provide the larger project list to select from.

Change-Id: I0d6674e75785206f3be48c8bf004a29906bb6860
Closes-Bug: #1382650

doc/source/topics/settings.rst

@@ -321,6 +321,17 @@ This example sorts flavors by vcpus in descending order::
          'reverse': True,
     }
 
+``DROPDOWN_MAX_ITEMS``
+----------------------
+
+.. versionadded:: 2015.1(Kilo)
+
+Default: ``30``
+
+This setting sets the maximum number of items displayed in a dropdown.
+Dropdowns that limit based on this value need to support a way to observe
+the entire list.
+
 ``IMAGES_LIST_FILTER_TENANTS``
 ------------------------------
 

openstack_dashboard/dashboards/identity/projects/tables.py

@@ -25,6 +25,27 @@ from openstack_dashboard import api
 from openstack_dashboard import policy
 
 
+class RescopeTokenToProject(tables.LinkAction):
+    name = "rescope"
+    verbose_name = _("Set as Active Project")
+    url = "switch_tenants"
+
+    def allowed(self, request, project):
+        # allow rescoping token to any project the user has a role on,
+        # authorized_tenants, and that they are not currently scoped to
+        return next((True for proj in request.user.authorized_tenants
+                     if proj.id == project.id and
+                     project.id != request.user.project_id), False)
+
+    def get_link_url(self, project):
+        # redirects to the switch_tenants url which then will redirect
+        # back to this page
+        dash_url = reverse("horizon:identity:projects:index")
+        base_url = reverse(self.url, args=[project.id])
+        param = urlencode({"next": dash_url})
+        return "?".join([base_url, param])
+
+
 class UpdateMembersLink(tables.LinkAction):
     name = "users"
     verbose_name = _("Modify Users")
@@ -211,7 +232,8 @@ class TenantsTable(tables.DataTable):
         verbose_name = _("Projects")
         row_class = UpdateRow
         row_actions = (UpdateMembersLink, UpdateGroupsLink, UpdateProject,
-                       UsageLink, ModifyQuotas, DeleteTenantsAction)
+                       UsageLink, ModifyQuotas, DeleteTenantsAction,
+                       RescopeTokenToProject)
         table_actions = (TenantFilterAction, CreateProject,
                          DeleteTenantsAction)
         pagination_param = "tenant_marker"

openstack_dashboard/local/local_settings.py.example

@@ -248,6 +248,9 @@ IMAGE_RESERVED_CUSTOM_PROPERTIES = []
 API_RESULT_LIMIT = 1000
 API_RESULT_PAGE_SIZE = 20
 
+# Specify a maximum number of items to display in a dropdown.
+DROPDOWN_MAX_ITEMS = 30
+
 # The timezone of the server. This should correspond with the timezone
 # of your entire OpenStack installation, and hopefully be in UTC.
 TIME_ZONE = "UTC"

openstack_dashboard/templates/_header.html

@@ -15,9 +15,9 @@
         {% show_project_list %}
         {% show_region_list %}
       </div>
-      <div class="footer disabled">
+      <div class="footer">
         <span class="glyphicon glyphicon-cog"></span>
-        {% trans "Filter selections" %}
+        <a href="{% url 'horizon:identity:projects:index' %}">{% trans "More Projects" %}</a>
       </div>
     </div><!-- end of dropdown-menu -->
   </div><!-- end of context-selection -->

openstack_dashboard/templatetags/context_selection.py

@@ -63,11 +63,14 @@ def show_domain_list(context):
 @register.inclusion_tag('context_selection/_project_list.html',
                         takes_context=True)
 def show_project_list(context):
+    max_proj = getattr(settings,
+                       'DROPDOWN_MAX_ITEMS',
+                       30)
     if 'request' not in context:
         return {}
     request = context['request']
     context = {'projects': sorted(context['authorized_tenants'],
-                                  key=lambda project: project.name),
+                                  key=lambda project: project.name)[:max_proj],
                'project_id': request.user.project_id,
                'request': request}
     return context