Add the ability to define priorities on the skins layers.

skins layers are sorted according to their
'business_template_skin_layer_priority' properties when installing a
business template.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@3550 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/BusinessTemplate.py

@@ -291,9 +291,12 @@ class SkinTemplateItem(ObjectTemplateItem):
           if skin_id not in selection:
             new_selection.append(skin_id)
       new_selection.extend(selection)
-      # make sure custom is always the first layer
-      new_selection.remove('custom')
-      new_selection = ['custom'] + new_selection
+      # sort the layer according to skin priorities
+      new_selection.sort(lambda a, b : cmp(
+        b in ps.objectIds() and ps[b].getProperty(
+            'business_template_skin_layer_priority', 0) or 0, 
+        a in ps.objectIds() and ps[a].getProperty(
+            'business_template_skin_layer_priority', 0) or 0))
       ps.manage_skinLayers(skinpath = tuple(new_selection), skinname = skin_name, add_skin = 1)
 
   def uninstall(self, context, **kw):

product/ERP5/ERP5Site.py

@@ -758,8 +758,10 @@ class ERP5Generator(PortalGenerator):
         addDirectoryViews(ps, 'skins', cmfactivity_globals)
         ps.manage_addProduct['OFSP'].manage_addFolder(id='external_method')
         ps.manage_addProduct['OFSP'].manage_addFolder(id='custom')
-        #ps.manage_addProduct['OFSP'].manage_addFolder(id='local_pro')
-        #ps.manage_addProduct['OFSP'].manage_addFolder(id='local_mrp')
+        # set the 'custom' layer a high priority, so it remains the first 
+        # layer when installing new business templates
+        ps['custom'].manage_addProperty(
+            "business_template_skin_layer_priority", 100.0, "float")
         ps.addSkinSelection('View', 'custom, external_method, activity, '
                                   + 'zpt_content, zpt_generic,'
                                   + 'zpt_control, content, generic, control, Images',