* Put sumlists in a central repository. Load from memory if a path

  is already walked.


git-svn-id: file:///home/lennart/svn/public/fring/trunk@62 d0d2c35f-0a1e-0410-abeb-dabff30a67ee

1 files changed, 42 insertions, 0 deletions

diff --git a/src/fringlib/fringdata.py b/src/fringlib/fringdata.py
index a9bea69..1da49c0 100644
--- a/src/fringlib/fringdata.py
+++ b/src/fringlib/fringdata.py
@@ -13,6 +13,10 @@ class SumList:
         self.children.append(sumlist)
         self.size += sumlist.size
 
+    def has_children(self):
+        if len(self.children) > 0: return True
+        return False
+
     def printout(self, tab=0 ):
         print "  "*tab,"%s (%i)"%(sumlist.name,sumlist.size)
         if not sumlist.children: return
@@ -54,5 +58,43 @@ class SumList:
         return 3
 
 
+#==================================================================================
+class SumListCollection:
+    """ A repository for folder data.
+
+    Is filled by the walker, and retrieved by the UI class.
+    An int is used to track changes in a path.
+
+    Since sumlists are objects, python will store references to them instead
+    of copying the data (as it would with tuples). 
+    """
+
+    def __init__(self):
+        self.clear()
+
+    def set_sumlist(self, uri, sumlist):
+        if not isinstance(sumlist,SumList): raise ValueError
+        if not isinstance(uri,unicode): raise ValueError
+        if not sumlist.has_children(): return # skip files
+        self.collection[uri] = sumlist
+        if uri in self.versionControl:
+            self.versionControl[uri] += 1
+        else:
+            self.versionControl[uri] = 0
+        
+    def get_sumlist(self, uri):
+        if uri in self.collection:
+            return self.collection[uri]
+
+    def has_changed(self, uri, version):
+        if uri in self.versionControl:
+            if version != self.versionControl[uri]:
+                return True
+        return False
+
+    def clear(self):
+        self.collection = {}
+        self.versionControl = {}
+        gc.collect()