allow view parameters for view names as node attributes to make views more selective

git-svn-id: svn://svn.cy55.de/Zope3/src/loops/trunk@2458 fd906abe-77d9-0310-91a1-e0d9ade77398

README.txt

@@ -814,6 +814,26 @@ target object's view here:
 
 'http://127.0.0.1/loops/views/m1/m11/m111/.target23'
 
+Special views
+-------------
+
+We may set a special view for a node by providing a view name.
+
+  >>> from loops.browser.node import ListChildren
+  >>> component.provideAdapter(ListChildren, (INode, IBrowserRequest), Interface,
+  ...                          name='listchildren')
+
+  >>> m112.viewName = 'listchildren?types=person'
+  >>> view = NodeView(m112, TestRequest())
+
+  >>> targetView = view.view
+
+  >>> targetView.macroName
+  'listchildren'
+
+  >>> targetView.params
+  {'types': ['person']}
+
 
 Collecting Information about Parents
 ====================================

browser/common.py

@@ -22,6 +22,7 @@ Common base class for loops browser view classes.
 $Id$
 """
 
+from cgi import parse_qs
 from zope import component
 from zope.app.form.browser.interfaces import ITerms
 from zope.app.i18n.interfaces import ITranslationDomain
@@ -126,6 +127,18 @@ class BaseView(GenericView, I18NView):
         # allow for having a separate object the view acts upon
         return self.context
 
+    @Lazy
+    def params(self):
+        result = {}
+        paramString = self.request.annotations.get('loops.view', {}).get('params')
+        if paramString:
+            result = parse_qs(paramString)
+            for k, v in result.items():
+                if len(v) == 1:
+                    v = [x.strip() for x in v[0].split(',')]
+                    result[k] = v
+        return result
+
     def setSkin(self, skinName):
         skin = None
         if skinName and IView.providedBy(self.context):

browser/concept.py

@@ -266,12 +266,19 @@ class ConceptView(BaseView):
     def getChildren(self, topLevelOnly=True, sort=True):
         cm = self.loopsRoot.getConceptManager()
         hasType = cm.getTypePredicate()
+        params = self.params
+        criteria = {}
+        if params.get('types'):
+            criteria['types'] = [cm.get(name) for name in params['types']]
         standard = cm.getDefaultPredicate()
         rels = (self.childViewFactory(r, self.request, contextIsSecond=True)
                 for r in self.context.getChildRelations(sort=None))
         if sort:
             rels = sorted(rels, key=lambda r: (r.order, r.title.lower()))
         for r in rels:
+            if criteria:
+                if not self.checkCriteria(r, criteria):
+                    continue
             if topLevelOnly and r.predicate == hasType:
                 # only show top-level entries for type instances:
                 skip = False
@@ -279,9 +286,18 @@ class ConceptView(BaseView):
                     if parent.conceptType == self.context:
                         skip = True
                         break
-                if skip: continue
+                if skip:
+                    continue
             yield r
 
+    def checkCriteria(self, relation, criteria):
+        result = True
+        for k, v in criteria.items():
+            if k == 'types':
+                v = [item for item in v if item is not None]
+                result = result and (relation.context.conceptType in v)
+        return result
+
     # Override in subclass to control what is displayd in listings:
     children = getChildren
 

browser/node.py

@@ -110,10 +110,15 @@ class NodeView(BaseView):
 
     @Lazy
     def view(self):
-        viewName = self.request.get('loops.viewName') or self.context.viewName
-        if viewName:
+        name = self.request.get('loops.viewName', '') or self.context.viewName
+        if '?' in name:
+            name, params = name.split('?', 1)
+            ann = self.request.annotations.get('loops.view', {})
+            ann['params'] = params
+            self.request.annotations['loops.view'] = ann
+        if name:
             adapter = component.queryMultiAdapter(
-                            (self.context, self.request), name=viewName)
+                            (self.context, self.request), name=name)
             if adapter is not None:
                 return adapter
         return self
@@ -298,15 +303,21 @@ class NodeView(BaseView):
             return None
 
     def targetView(self, name='index.html', methodName='show'):
+        if '?' in name:
+            name, params = name.split('?', 1)
+            print '***', name, params
         target = self.virtualTargetObject
         if target is not None:
             ti = IType(target).typeInterface
-            targetView = None
-            if ti is not None:
-                adapted = ti(target)
-                targetView = component.queryMultiAdapter((adapted, self.request),
-                        name=name)
-            if targetView is None:
+            #targetView = None
+            #if ti is not None:
+            #    adapted = ti(target)
+            #    targetView = component.queryMultiAdapter((adapted, self.request),
+            #            name=name)
+            #if targetView is None:
+            #    targetView = component.getMultiAdapter((target, self.request),
+            #            name=name)
+            target = adapted(target)
             targetView = component.getMultiAdapter((target, self.request),
                         name=name)
             if name == 'index.html' and hasattr(targetView, 'show'):
@@ -537,12 +548,17 @@ class SpecialNodeView(NodeView):
 
 
 class ListPages(SpecialNodeView):
+
     macroName = 'listpages'
 
+
 class ListResources(SpecialNodeView):
+
     macroName = 'listresources'
 
+
 class ListChildren(SpecialNodeView):
+
     macroName = 'listchildren'