issue2550678: Allow pagesize=-1 which returns all results.

Suggested and implemented by John Kristensen.
Tested by Satchidanand Haridas.

Author: Bernhard Reiter

CHANGES.txt

@@ -6,6 +6,11 @@ Entries without name were done by Richard Jones.
 2011-XX-XX 1.4.20 (r4XXX)
 
 Features:
+
+- issue2550678: Allow pagesize=-1 which returns all results.
+  Suggested and implemented by John Kristensen. 
+  Tested by Satchidanand Haridas. (Bernhard)
+
 Fixed:
 
 - issue2550715: IndexError when requesting non-existing file via http.

roundup/cgi/ZTUtils/Batch.py

@@ -52,7 +52,8 @@ def __init__(self, sequence, size, start=0, end=0,
         "orphan" elements, it is combined with the current batch.
         "overlap" is the number of elements shared by adjacent
         batches.  If "size" is not specified, it is computed from
-        "start" and "end".  Failing that, it is 7.
+        "start" and "end".  If "size" is 0, it is the length of
+        the sequence. Failing that, it is 7.
 
         Attributes: Note that the "start" attribute, unlike the
         argument, is a 1-based index (I know, lame).  "first" is the
@@ -92,7 +93,9 @@ def __len__(self):
 
 def opt(start,end,size,orphan,sequence):
     if size < 1:
-        if start > 0 and end > 0 and end >= start:
+        if size == 0:
+            size=len(sequence)
+        elif start > 0 and end > 0 and end >= start:
             size=end+1-start
         else: size=7