Comments
Patch
@@ -46,10 +46,18 @@ class revnav(object):
:nodefun: factory for a changectx from a revision
"""
self.nodefunc = nodefunc
+ def __nonzero__(self):
+ """return True if any revision to navigate over"""
+ try:
+ self.nodefunc(0)
+ return True
+ except error.RepoError:
+ return False
+
def hex(self, rev):
return self.nodefunc(rev).hex()
def gen(self, pos, pagelen, limit):
"""computes label and revision id for navigation link
@@ -62,10 +70,13 @@ class revnav(object):
- a single element tuple
- containing a dictionary with a `before` and `after` key
- values are generator function taking arbitrary number of kwargs
- yield items are dictionnary with `label` and `node` key
"""
+ if not self:
+ # empty repo
+ return ({'before': (), 'after': ()},)
navbefore = []
navafter = []
for f in _navseq(1, pagelen):
@@ -75,14 +86,11 @@ class revnav(object):
navafter.append(("+%d" % f, self.hex(pos + f)))
if pos - f >= 0:
navbefore.insert(0, ("-%d" % f, self.hex(pos - f)))
navafter.append(("tip", "tip"))
- try:
- navbefore.insert(0, ("(0)", self.hex(0)))
- except error.RepoError:
- pass
+ navbefore.insert(0, ("(0)", self.hex(0)))
def gen(l):
def f(**map):
return ({"label": i[0], "node": i[1]} for i in l)
return f