view mercurial/pushkey.py @ 29130:ed2a3818c1fc

crecord: call prevsibling() and nextsibling() directly

The 3 classes for items used in crecord (uiheader, uihunk, uihunkline) all have
prevsibling() and nextsibling() methods. The two methods are used to get the
previous/next item of the same type of the same parent element as the current
one: when `a` is a uihunkline instance, a.nextsibling() returns the next line
in this hunk (or None, if `a` is the last line).

There are also two similar methods: previtem() and nextitem(). When called with
constrainlevel=True (the default) they simply returned the result of
prevsibling()/nextsibling(). Only when called with constrainlevel=False they
did something different: they returned previous/next item regardless of its
type (so if `a` is the last line in a hunk, a.nextitem(constrainlevel=False)
could return the next hunk or the next file -- something that is not a line).

Let's simplify this logic and make code call -sibling() methods when only
siblings are needed and -item() methods when any item would do, and then remove
the constrainlevel argument from previtem() and nextitem().

# pushkey.py - dispatching for pushing and pulling keys
#
# Copyright 2010 Matt Mackall <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

from __future__ import absolute_import

from . import (
    bookmarks,
    encoding,
    obsolete,
    phases,
)

def _nslist(repo):
    n = {}
    for k in _namespaces:
        n[k] = ""
    if not obsolete.isenabled(repo, obsolete.exchangeopt):
        n.pop('obsolete')
    return n

_namespaces = {"namespaces": (lambda *x: False, _nslist),
               "bookmarks": (bookmarks.pushbookmark, bookmarks.listbookmarks),
               "phases": (phases.pushphase, phases.listphases),
               "obsolete": (obsolete.pushmarker, obsolete.listmarkers),
              }

def register(namespace, pushkey, listkeys):
    _namespaces[namespace] = (pushkey, listkeys)

def _get(namespace):
    return _namespaces.get(namespace, (lambda *x: False, lambda *x: {}))

def push(repo, namespace, key, old, new):
    '''should succeed iff value was old'''
    pk = _get(namespace)[0]
    return pk(repo, key, old, new)

def list(repo, namespace):
    '''return a dict'''
    lk = _get(namespace)[1]
    return lk(repo)

encode = encoding.fromlocal

decode = encoding.tolocal

def encodekeys(keys):
    """encode the content of a pushkey namespace for exchange over the wire"""
    return '\n'.join(['%s\t%s' % (encode(k), encode(v)) for k, v in keys])

def decodekeys(data):
    """decode the content of a pushkey namespace from exchange over the wire"""
    result = {}
    for l in data.splitlines():
        k, v = l.split('\t')
        result[decode(k)] = decode(v)
    return result