[Checkins] SVN: grok/trunk/src/grok/ implemented continue_scanning for Grokkers

[Wolfgang Schnerring]

Log message for revision 71733:
  implemented continue_scanning for Grokkers

Changed:
  U   grok/trunk/src/grok/components.py
  U   grok/trunk/src/grok/grokker.py
  A   grok/trunk/src/grok/tests/grokker/continue_scanning.py
  A   grok/trunk/src/grok/tests/grokker/continue_scanning_fixture.py

-=-
Modified: grok/trunk/src/grok/components.py
===================================================================
--- grok/trunk/src/grok/components.py	2007-01-06 13:29:33 UTC (rev 71732)
+++ grok/trunk/src/grok/components.py	2007-01-06 13:56:55 UTC (rev 71733)
@@ -52,6 +52,7 @@
     """
 
     priority = 0
+    continue_scanning = False
 
 
 class ClassGrokker(GrokkerBase):

Modified: grok/trunk/src/grok/grokker.py
===================================================================
--- grok/trunk/src/grok/grokker.py	2007-01-06 13:29:33 UTC (rev 71732)
+++ grok/trunk/src/grok/grokker.py	2007-01-06 13:56:55 UTC (rev 71733)
@@ -43,7 +43,8 @@
             for grokker in grokkers:
                 if grokker.match(obj):
                     components[grokker.component_class].append((name, obj))
-                    break
+                    if not grokker.continue_scanning:
+                        break
 
         return components
 

Added: grok/trunk/src/grok/tests/grokker/continue_scanning.py
===================================================================
--- grok/trunk/src/grok/tests/grokker/continue_scanning.py	2007-01-06 13:29:33 UTC (rev 71732)
+++ grok/trunk/src/grok/tests/grokker/continue_scanning.py	2007-01-06 13:56:55 UTC (rev 71733)
@@ -0,0 +1,40 @@
+"""
+A Grokker can declare that scanning should continue, so that other Grokkers can
+still perform actions on the grokked components.
+
+Here we define AlphaGrokker which has higher priority than BetaGrokker but does
+not block BetaGrokker from picking up the same component::
+
+    >>> grok.grok(__name__)
+
+In the fixture there is AlphaBetaSub that inherits from both Alpha and Beta.
+Thus, both Grokkers are executed, with AlphaGrokker coming before BetaGrokker::
+
+    >>> grok.grok('grok.tests.grokker.continue_scanning_fixture')
+    alpha
+    beta
+
+"""
+import grok
+
+
+class Alpha(object):
+    pass
+
+class Beta(object):
+    pass
+
+class AlphaGrokker(grok.ClassGrokker):
+    component_class = Alpha
+    continue_scanning = True
+    priority = 1 # we need to go before BetaGrokker
+
+    def register(self, context, name, factory, module_info, templates):
+        print "alpha"
+
+
+class BetaGrokker(grok.ClassGrokker):
+    component_class = Beta
+
+    def register(self, context, name, factory, module_info, templates):
+        print "beta"

Added: grok/trunk/src/grok/tests/grokker/continue_scanning_fixture.py
===================================================================
--- grok/trunk/src/grok/tests/grokker/continue_scanning_fixture.py	2007-01-06 13:29:33 UTC (rev 71732)
+++ grok/trunk/src/grok/tests/grokker/continue_scanning_fixture.py	2007-01-06 13:56:55 UTC (rev 71733)
@@ -0,0 +1,4 @@
+from grok.tests.grokker.continue_scanning import Alpha, Beta
+
+class AlphaBetaSub(Alpha, Beta):
+    pass