8377: cache path

gramps/gui/views/treemodels/basemodel.py

@@ -34,11 +34,13 @@ class BaseModel(object):
 
     def __init__(self):
         self.lru_data  = LRU(BaseModel._CACHE_SIZE)
+        self.lru_path = LRU(BaseModel._CACHE_SIZE)
 
     def destroy(self):
         """
         """
         self.lru_data = None
+        self.lru_path = None
 
     def clear_cache(self, handle=None):
         """
@@ -49,6 +51,8 @@ class BaseModel(object):
                 del self.lru_data[handle]
         else:
             self.lru_data.clear()
+        # Invalidates all paths
+        self.lru_path.clear()
 
     def get_cached_value(self, handle, col):
         """
@@ -64,4 +68,17 @@ class BaseModel(object):
             if handle not in self.lru_data:
                 self.lru_data[handle] = {}
             self.lru_data[handle][col] = data
+    
+    ## Cached Path's for TreeView:
+    def get_cached_path(self, handle):
+        """
+        """
+        if handle in self.lru_path:
+            return (True, self.lru_path[handle])
+        return (False, None)
 
+    def set_cached_path(self, handle, path):
+        """
+        """
+        if not self._in_build:
+            self.lru_path[handle] = path

gramps/gui/views/treemodels/treebasemodel.py

@@ -966,6 +966,9 @@ class TreeBaseModel(GObject.GObject, Gtk.TreeModel, BaseModel):
         """
         Returns a path from a given node.
         """
+        cached, value = self.get_cached_path(iter.user_data)
+        if cached:
+            return value
         node = self.get_node_from_iter(iter)
         pathlist = []
         while node.parent is not None:
@@ -978,12 +981,13 @@ class TreeBaseModel(GObject.GObject, Gtk.TreeModel, BaseModel):
                 index += 1
             pathlist.append(index)
             node = parent
-
         if pathlist:
             pathlist.reverse()
-            return Gtk.TreePath(tuple(pathlist))
+            retval = Gtk.TreePath(tuple(pathlist))
         else:
-            return None
+            retval = None
+        self.set_cached_path(iter.user_data, retval)
+        return retval
 
     def do_iter_next(self, iter):
         """