comparison mercurial/templatekw.py @ 36921:32f9b7e3f056

templater: move hybrid class and functions to templateutil module

And make _hybrid and _mappable classes public. _showlist() is still marked
as private since it's weird and third-party codes shouldn't depend on it.

36920:6ff6e1d6b5b8

    obsutil,
    patch,
    pycompat,
    registrar,
    scmutil,
    util,
)

class _hybrid(object):
    """Wrapper for list or dict to support legacy template

    This class allows us to handle both:
    - "{files}" (legacy command-line-specific list hack) and
    - "{files % '{file}\n'}" (hgweb-style with inlining and function support)
    and to access raw values:
    - "{ifcontains(file, files, ...)}", "{ifcontains(key, extras, ...)}"
    - "{get(extras, key)}"
    - "{files|json}"
    """

    def __init__(self, gen, values, makemap, joinfmt, keytype=None):
        if gen is not None:
            self.gen = gen  # generator or function returning generator
        self._values = values
        self._makemap = makemap
        self.joinfmt = joinfmt
        self.keytype = keytype  # hint for 'x in y' where type(x) is unresolved
    def gen(self):
        """Default generator to stringify this as {join(self, ' ')}"""
        for i, x in enumerate(self._values):
            if i > 0:
                yield ' '
            yield self.joinfmt(x)
    def itermaps(self):
        makemap = self._makemap
        for x in self._values:
            yield makemap(x)
    def __contains__(self, x):
        return x in self._values
    def __getitem__(self, key):
        return self._values[key]
    def __len__(self):
        return len(self._values)
    def __iter__(self):
        return iter(self._values)
    def __getattr__(self, name):
        if name not in (r'get', r'items', r'iteritems', r'iterkeys',
                        r'itervalues', r'keys', r'values'):
            raise AttributeError(name)
        return getattr(self._values, name)

class _mappable(object):
    """Wrapper for non-list/dict object to support map operation

    This class allows us to handle both:
    - "{manifest}"
    - "{manifest % '{rev}:{node}'}"
    - "{manifest.rev}"

    Unlike a _hybrid, this does not simulate the behavior of the underling
    value. Use unwrapvalue() or unwraphybrid() to obtain the inner object.
    """

    def __init__(self, gen, key, value, makemap):
        if gen is not None:
            self.gen = gen  # generator or function returning generator
        self._key = key
        self._value = value  # may be generator of strings
        self._makemap = makemap

    def gen(self):
        yield pycompat.bytestr(self._value)

    def tomap(self):
        return self._makemap(self._key)

    def itermaps(self):
        yield self.tomap()

def hybriddict(data, key='key', value='value', fmt=None, gen=None):
    """Wrap data to support both dict-like and string-like operations"""
    prefmt = pycompat.identity
    if fmt is None:
        fmt = '%s=%s'
        prefmt = pycompat.bytestr
    return _hybrid(gen, data, lambda k: {key: k, value: data[k]},
                   lambda k: fmt % (prefmt(k), prefmt(data[k])))

def hybridlist(data, name, fmt=None, gen=None):
    """Wrap data to support both list-like and string-like operations"""
    prefmt = pycompat.identity
    if fmt is None:
        fmt = '%s'
        prefmt = pycompat.bytestr
    return _hybrid(gen, data, lambda x: {name: x}, lambda x: fmt % prefmt(x))

def unwraphybrid(thing):
    """Return an object which can be stringified possibly by using a legacy
    template"""
    gen = getattr(thing, 'gen', None)
    if gen is None:
        return thing
    if callable(gen):
        return gen()
    return gen

def unwrapvalue(thing):
    """Move the inner value object out of the wrapper"""
    if not util.safehasattr(thing, '_value'):
        return thing
    return thing._value

def wraphybridvalue(container, key, value):
    """Wrap an element of hybrid container to be mappable

    The key is passed to the makemap function of the given container, which
    should be an item generated by iter(container).
    """
    makemap = getattr(container, '_makemap', None)
    if makemap is None:
        return value
    if util.safehasattr(value, '_makemap'):
        # a nested hybrid list/dict, which has its own way of map operation
        return value
    return _mappable(None, key, value, makemap)

def compatdict(context, mapping, name, data, key='key', value='value',
               fmt=None, plural=None, separator=' '):
    """Wrap data like hybriddict(), but also supports old-style list template

    This exists for backward compatibility with the old-style template. Use
    hybriddict() for new template keywords.
    """
    c = [{key: k, value: v} for k, v in data.iteritems()]
    t = context.resource(mapping, 'templ')
    f = _showlist(name, c, t, mapping, plural, separator)
    return hybriddict(data, key=key, value=value, fmt=fmt, gen=f)

def compatlist(context, mapping, name, data, element=None, fmt=None,
               plural=None, separator=' '):
    """Wrap data like hybridlist(), but also supports old-style list template

    This exists for backward compatibility with the old-style template. Use
    hybridlist() for new template keywords.
    """
    t = context.resource(mapping, 'templ')
    f = _showlist(name, data, t, mapping, plural, separator)
    return hybridlist(data, name=element or name, fmt=fmt, gen=f)

def showdict(name, data, mapping, plural=None, key='key', value='value',
             fmt=None, separator=' '):
    ui = mapping.get('ui')
    if ui:
        ui.deprecwarn("templatekw.showdict() is deprecated, use compatdict()",
                      '4.6')
    c = [{key: k, value: v} for k, v in data.iteritems()]
    f = _showlist(name, c, mapping['templ'], mapping, plural, separator)
    return hybriddict(data, key=key, value=value, fmt=fmt, gen=f)

def showlist(name, values, mapping, plural=None, element=None, separator=' '):
    ui = mapping.get('ui')
    if ui:
        ui.deprecwarn("templatekw.showlist() is deprecated, use compatlist()",
                      '4.6')
    if not element:
        element = name
    f = _showlist(name, values, mapping['templ'], mapping, plural, separator)
    return hybridlist(values, name=element, gen=f)

def _showlist(name, values, templ, mapping, plural=None, separator=' '):
    '''expand set of values.
    name is name of key in template map.
    values is list of strings or dicts.
    plural is plural of name, if not simply name + 's'.
    separator is used to join values as a string

    expansion works like this, given name 'foo'.

    if values is empty, expand 'no_foos'.

    if 'foo' not in template map, return values as a string,
    joined by 'separator'.

    expand 'start_foos'.

    for each value, expand 'foo'. if 'last_foo' in template
    map, expand it instead of 'foo' for last key.

    expand 'end_foos'.
    '''
    strmapping = pycompat.strkwargs(mapping)
    if not plural:
        plural = name + 's'
    if not values:
        noname = 'no_' + plural
        if noname in templ:
            yield templ(noname, **strmapping)
        return
    if name not in templ:
        if isinstance(values[0], bytes):
            yield separator.join(values)
        else:
            for v in values:
                r = dict(v)
                r.update(mapping)
                yield r
        return
    startname = 'start_' + plural
    if startname in templ:
        yield templ(startname, **strmapping)
    vmapping = mapping.copy()
    def one(v, tag=name):
        try:
            vmapping.update(v)
        # Python 2 raises ValueError if the type of v is wrong. Python
        # 3 raises TypeError.
        except (AttributeError, TypeError, ValueError):
            try:
                # Python 2 raises ValueError trying to destructure an e.g.
                # bytes. Python 3 raises TypeError.
                for a, b in v:
                    vmapping[a] = b
            except (TypeError, ValueError):
                vmapping[name] = v
        return templ(tag, **pycompat.strkwargs(vmapping))
    lastname = 'last_' + name
    if lastname in templ:
        last = values.pop()
    else:
        last = None
    for v in values:
        yield one(v)
    if last is not None:
        yield one(last, tag=lastname)
    endname = 'end_' + plural
    if endname in templ:
        yield templ(endname, **strmapping)

def getlatesttags(context, mapping, pattern=None):
    '''return date, distance and name for the latest tag of rev'''
    repo = context.resource(mapping, 'repo')
    ctx = context.resource(mapping, 'ctx')

36921:32f9b7e3f056

    obsutil,
    patch,
    pycompat,
    registrar,
    scmutil,
    templateutil,
    util,
)

_hybrid = templateutil.hybrid
_mappable = templateutil.mappable
_showlist = templateutil._showlist
hybriddict = templateutil.hybriddict
hybridlist = templateutil.hybridlist
compatdict = templateutil.compatdict
compatlist = templateutil.compatlist

def showdict(name, data, mapping, plural=None, key='key', value='value',
             fmt=None, separator=' '):
    ui = mapping.get('ui')
    if ui:
        ui.deprecwarn("templatekw.showdict() is deprecated, use "
                      "templateutil.compatdict()", '4.6')
    c = [{key: k, value: v} for k, v in data.iteritems()]
    f = _showlist(name, c, mapping['templ'], mapping, plural, separator)
    return hybriddict(data, key=key, value=value, fmt=fmt, gen=f)

def showlist(name, values, mapping, plural=None, element=None, separator=' '):
    ui = mapping.get('ui')
    if ui:
        ui.deprecwarn("templatekw.showlist() is deprecated, use "
                      "templateutil.compatlist()", '4.6')
    if not element:
        element = name
    f = _showlist(name, values, mapping['templ'], mapping, plural, separator)
    return hybridlist(values, name=element, gen=f)

def getlatesttags(context, mapping, pattern=None):
    '''return date, distance and name for the latest tag of rev'''
    repo = context.resource(mapping, 'repo')
    ctx = context.resource(mapping, 'ctx')