# HG changeset patch
# User Daniele Nicolodi <daniele@grinta.net>
# Date 1309176518 -7200
# Node ID 76e6b6c5d5cb76f3e4d0b8b72689fba07cdce269
# Parent  4c08f51482a352ab44e9cd539c55c35763dcf92d
Add a 'limits' property to the Pagination class.

The 'limits' property returns the index boundaries for the current
page in the paginated list and is usefull to implement SQL queries.

diff -r 4c08f51482a3 -r 76e6b6c5d5cb src/ltpdarepo/pagination.py
--- a/src/ltpdarepo/pagination.py	Mon Jun 27 14:08:38 2011 +0200
+++ b/src/ltpdarepo/pagination.py	Mon Jun 27 14:08:38 2011 +0200
@@ -1,10 +1,10 @@
 from math import ceil, floor
 
 class Pagination(object):
-    def __init__(self, current, bsize, total, items=9):
+    def __init__(self, current, size, count, items=9):
         self.current = current
-        self.bsize = bsize
-        self.total = total
+        self.size = size
+        self.count = count
         self.items = items
 
     @property
@@ -13,7 +13,7 @@
 
     @property
     def pages(self):
-        return int(ceil(self.total / float(self.bsize)))
+        return int(ceil(self.count / float(self.size)))
 
     @property
     def has_prev(self):
@@ -23,6 +23,10 @@
     def has_next(self):
         return self.current < self.pages
 
+    @property
+    def limits(self):
+        return ((self.current - 1) * self.size, self.size)
+
     def __iter__(self):
         # cache number of pages
         npages = self.pages