work in progress: layout management

git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@2909 fd906abe-77d9-0310-91a1-e0d9ade77398

composer/layout/base.py

@@ -44,12 +44,14 @@ class LayoutManager(object):
         for name, layout in component.getUtilitiesFor(ILayout):
             region = result.setdefault(layout.regionName,
                                        Region(layout.regionName))
+            # layout.name = name
             region.layouts.append(layout)
         return result
 
     def getLayouts(self, key, instance):
         region = self.regions.get(key)
-        return sorted(instance.getLayouts(region), key=lambda x: x.order)
+        return sorted(instance.getLayouts(region),
+                      key=lambda x: x.template.order)
 
 
 class Layout(Template):
@@ -83,8 +85,15 @@ class LayoutInstance(object):
         return self.template.renderer
 
     def getLayouts(self, region):
+        """ Return sublayout instances.
+        """
         if region is None:
             return []
+        result = []
         sublayouts = self.template.sublayouts
-        return [l for l in region.layouts
-                    if sublayouts is None or l.name in sublayouts]
+        for l in region.layouts:
+            if sublayouts is None or l.name in sublayouts:
+                li = ILayoutInstance(self.context)
+                li.template = l
+                result.append(li)
+        return result

composer/layout/browser/view.py

@@ -56,13 +56,23 @@ class BaseView(object):
 class Page(BaseView):
 
     layoutName = 'page'
+    layoutNames = ['page']
 
     @Lazy
     def rootView(self):
         return self
 
     def __call__(self):
-        layout = component.getUtility(ILayout, name=self.layoutName)
+        # use LayoutManager to retrieve page region;
+        # then search in self.layoutNames for a fit
+        manager = component.getUtility(ILayoutManager)
+        layouts = manager.regions['page'].layouts
+        layoutNames = layouts.keys()
+        layout = None
+        for n in self.layoutNames:
+            if n in layoutNames:
+                layout = layouts[n]
+                break
         instance = ILayoutInstance(self.context)
         instance.template = layout
         view = LayoutView(instance, self.request, name='page',
@@ -97,10 +107,6 @@ class LayoutView(BaseView):
     def layouts(self):
         return ViewLayouts(self)
 
-    @Lazy
-    def resources(self):
-        return ViewResources(self)
-
     def getLayoutsFor(self, key):
         manager = component.getUtility(ILayoutManager)
         return manager.getLayouts('.'.join((self.name, key)), self.context)
@@ -116,9 +122,7 @@ class ViewLayouts(object):
     def __getitem__(self, key):
         view = self.view
         subviews = []
-        for layout in view.getLayoutsFor(key):
-            instance = ILayoutInstance(view.client)
-            instance.template = layout
+        for instance in view.getLayoutsFor(key):
             v = LayoutView(instance, view.request, name=key,
                            parent=view, page=view.page)
             instance.view = v

composer/layout/interfaces.py

@@ -78,6 +78,8 @@ class ILayout(ITemplate):
 
     renderer = Attribute(u'An object responsible for rendering the layout.')
     order = Attribute(u'A number that may be used as a sorting key.')
+    sublayouts = Attribute(u'A set of names explicitly specifying sub-layouts '
+                    u'for this layout.')
 
 
 class ILayoutComponent(IComponent):