common/selectors.py
author Sylvain Thenault <sylvain.thenault@logilab.fr>
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"""This file contains some basic selectors required by application objects.
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A selector is responsible to score how well an object may be used with a
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given result set (publishing time selection)
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:organization: Logilab
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:copyright: 2001-2008 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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"""
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__docformat__ = "restructuredtext en"
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from logilab.common.compat import all
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from logilab.common.deprecation import deprecated_function
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from cubicweb import Unauthorized, NoSelectableObject, role
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from cubicweb.cwvreg import DummyCursorError
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from cubicweb.vregistry import chainall, chainfirst, NoSelectableObject
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from cubicweb.cwconfig import CubicWebConfiguration
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from cubicweb.schema import split_expression
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def lltrace(selector):
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    # don't wrap selectors if not in development mode
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    if CubicWebConfiguration.mode == 'installed':
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        return selector
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    def traced(cls, *args, **kwargs):
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        ret = selector(cls, *args, **kwargs)
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        cls.lldebug('selector %s returned %s for %s', selector.__name__, ret, cls)
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        return ret
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    return traced
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# very basic selectors ########################################################
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def yes(cls, *args, **kwargs):
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    """accept everything"""
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    return 1
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yes_selector = deprecated_function(yes)
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@lltrace
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def none_rset(cls, req, rset, *args, **kwargs):
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    """accept no result set"""
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    if rset is None:
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        return 1
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    return 0
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norset_selector = deprecated_function(none_rset)
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@lltrace
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def rset(cls, req, rset, *args, **kwargs):
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    """accept result set, whatever the number of result"""
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    if rset is not None:
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        return 1
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    return 0
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rset_selector = deprecated_function(rset)
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@lltrace
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def nonempty_rset(cls, req, rset, *args, **kwargs):
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    """accept any non empty result set"""
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    if rset is not None and rset.rowcount:
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        return 1
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    return 0
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anyrset_selector = deprecated_function(nonempty_rset)
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@lltrace
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def empty_rset(cls, req, rset, *args, **kwargs):
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    """accept empty result set"""
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    if rset is not None and rset.rowcount == 0:
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        return 1
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    return 0
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emptyrset_selector = deprecated_function(empty_rset)
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@lltrace
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def one_line_rset(cls, req, rset, row=None, *args, **kwargs):
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    """accept result set with a single line of result"""
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    if rset is not None and (row is not None or rset.rowcount == 1):
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        return 1
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    return 0
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onelinerset_selector = deprecated_function(one_line_rset)
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@lltrace
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def two_lines_rset(cls, req, rset, *args, **kwargs):
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    """accept result set with *at least* two lines of result"""
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    if rset is not None and rset.rowcount > 1:
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        return 1
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    return 0
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twolinerset_selector = deprecated_function(two_lines_rset)
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@lltrace
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def two_cols_rset(cls, req, rset, *args, **kwargs):
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    """accept result set with at least one line and two columns of result"""
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    if rset is not None and rset.rowcount > 0 and len(rset.rows[0]) > 1:
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        return 1
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    return 0
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twocolrset_selector = deprecated_function(two_cols_rset)
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@lltrace
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def paginated_rset(cls, req, rset, *args, **kwargs):
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    """accept result sets with more rows than the page size
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    """
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    if rset is None or len(rset) <= req.property_value('navigation.page-size'):
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        return 0
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    return 1
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largerset_selector = deprecated_function(paginated_rset)
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@lltrace
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def sorted_rset(cls, req, rset, row=None, col=None):
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    """accept sorted result set"""
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    rqlst = rset.syntax_tree()
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    if len(rqlst.children) > 1 or not rqlst.children[0].orderby:
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        return 0
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    return 2
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sortedrset_selector = deprecated_function(sorted_rset)
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@lltrace
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def one_etype_rset(cls, req, rset, *args, **kwargs):
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    """accept result set where entities in the first columns are all of the
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    same type
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    """
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    if len(rset.column_types(0)) != 1:
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        return 0
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    return 1
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oneetyperset_selector = deprecated_function(one_etype_rset)
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@lltrace
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def two_etypes_rset(cls, req, rset, **kwargs):
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    """accepts resultsets containing several entity types"""
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   127
    if rset:
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        etypes = rset.column_types(0)
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   129
        if len(etypes) > 1:
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            return 1
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   131
    return 0
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   132
multitype_selector = deprecated_function(two_etypes_rset)
0
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@lltrace
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   135
def match_search_state(cls, req, rset, row=None, col=None, **kwargs):
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diff changeset
   136
    """checks if the current search state is in a .search_states attribute of
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diff changeset
   137
    the wrapped class
0
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    search state should be either 'normal' or 'linksearch' (eg searching for an
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    object to create a relation with another)
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   141
    """
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   142
    try:
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   143
        if not req.search_state[0] in cls.search_states:
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   144
            return 0
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   145
    except AttributeError:
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   146
        return 1 # class don't care about search state, accept it
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   147
    return 1
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   148
searchstate_selector = deprecated_function(match_search_state)
0
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   149
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   150
@lltrace
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diff changeset
   151
def anonymous_user(cls, req, *args, **kwargs):
0
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   152
    """accept if user is anonymous"""
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   153
    if req.cnx.anonymous_connection:
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   154
        return 1
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   155
    return 0
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   156
anonymous_selector = deprecated_function(anonymous_user)
0
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   157
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   158
@lltrace
236
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diff changeset
   159
def authenticated_user(cls, req, *args, **kwargs):
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diff changeset
   160
    """accept if user is authenticated"""
0
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   161
    return not anonymous_selector(cls, req, *args, **kwargs)
236
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diff changeset
   162
not_anonymous_selector = deprecated_function(authenticated_user)
0
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   163
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   164
@lltrace
236
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diff changeset
   165
def match_form_params(cls, req, *args, **kwargs):
0
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diff changeset
   166
    """check if parameters specified by the form_params attribute on
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   167
    the wrapped class are specified in request form parameters
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   168
    """
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   169
    score = 0
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   170
    for param in cls.form_params:
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   171
        val = req.form.get(param)
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   172
        if not val:
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   173
            return 0
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diff changeset
   174
        score += 1
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   175
    return score + 1
236
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diff changeset
   176
req_form_params_selector = deprecated_function(match_form_params)
0
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   177
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   178
@lltrace
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diff changeset
   179
def match_kwargs(cls, req, *args, **kwargs):
0
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   180
    """check if arguments specified by the expected_kwargs attribute on
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   181
    the wrapped class are specified in given named parameters
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   182
    """
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   183
    values = []
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   184
    for arg in cls.expected_kwargs:
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   185
        if not arg in kwargs:
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   186
            return 0
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   187
    return 1
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diff changeset
   188
kwargs_selector = deprecated_function(match_kwargs)
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parents: 230
diff changeset
   189
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diff changeset
   190
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diff changeset
   191
# not so basic selectors ######################################################
0
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   192
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   193
@lltrace
237
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parents: 236
diff changeset
   194
def accept_etype(cls, req, *args, **kwargs):
0
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diff changeset
   195
    """check etype presence in request form *and* accepts conformance"""
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   196
    if 'etype' not in req.form and 'etype' not in kwargs:
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diff changeset
   197
        return 0
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diff changeset
   198
    try:
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diff changeset
   199
        etype = req.form['etype']
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diff changeset
   200
    except KeyError:
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diff changeset
   201
        etype = kwargs['etype']
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diff changeset
   202
    # value is a list or a tuple if web request form received several
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diff changeset
   203
    # values for etype parameter
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diff changeset
   204
    assert isinstance(etype, basestring), "got multiple etype parameters in req.form"
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diff changeset
   205
    if 'Any' in cls.accepts:
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parents:
diff changeset
   206
        return 1
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diff changeset
   207
    # no Any found, we *need* exact match
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diff changeset
   208
    if etype not in cls.accepts:
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parents:
diff changeset
   209
        return 0
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diff changeset
   210
    # exact match must return a greater value than 'Any'-match
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parents:
diff changeset
   211
    return 2
237
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Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 236
diff changeset
   212
etype_form_selector = deprecated_function(accept_etype)
0
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parents:
diff changeset
   213
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diff changeset
   214
@lltrace
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parents:
diff changeset
   215
def _nfentity_selector(cls, req, rset, row=None, col=None, **kwargs):
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parents:
diff changeset
   216
    """accept non final entities
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parents:
diff changeset
   217
    if row is not specified, use the first one
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parents:
diff changeset
   218
    if col is not specified, use the first one
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parents:
diff changeset
   219
    """
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diff changeset
   220
    etype = rset.description[row or 0][col or 0]
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parents:
diff changeset
   221
    if etype is None: # outer join
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diff changeset
   222
        return 0
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diff changeset
   223
    if cls.schema.eschema(etype).is_final():
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parents:
diff changeset
   224
        return 0
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parents:
diff changeset
   225
    return 1
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parents:
diff changeset
   226
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parents:
diff changeset
   227
@lltrace
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diff changeset
   228
def _rqlcondition_selector(cls, req, rset, row=None, col=None, **kwargs):
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parents:
diff changeset
   229
    """accept single entity result set if the entity match an rql condition
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parents:
diff changeset
   230
    """
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parents:
diff changeset
   231
    if cls.condition:
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diff changeset
   232
        eid = rset[row or 0][col or 0]
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diff changeset
   233
        if 'U' in frozenset(split_expression(cls.condition)):
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parents:
diff changeset
   234
            rql = 'Any X WHERE X eid %%(x)s, U eid %%(u)s, %s' % cls.condition
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diff changeset
   235
        else:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   236
            rql = 'Any X WHERE X eid %%(x)s, %s' % cls.condition
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diff changeset
   237
        try:
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diff changeset
   238
            return len(req.execute(rql, {'x': eid, 'u': req.user.eid}, 'x'))
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parents:
diff changeset
   239
        except Unauthorized:
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parents:
diff changeset
   240
            return 0
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parents:
diff changeset
   241
        
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parents:
diff changeset
   242
    return 1
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parents:
diff changeset
   243
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parents:
diff changeset
   244
@lltrace
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parents:
diff changeset
   245
def _interface_selector(cls, req, rset, row=None, col=None, **kwargs):
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parents:
diff changeset
   246
    """accept uniform result sets, and apply the following rules:
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parents:
diff changeset
   247
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parents:
diff changeset
   248
    * wrapped class must have a accepts_interfaces attribute listing the
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parents:
diff changeset
   249
      accepted ORed interfaces
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diff changeset
   250
    * if row is None, return the sum of values returned by the method
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parents:
diff changeset
   251
      for each entity's class in the result set. If any score is 0,
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parents:
diff changeset
   252
      return 0.
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parents:
diff changeset
   253
    * if row is specified, return the value returned by the method with
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parents:
diff changeset
   254
      the entity's class of this row
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parents:
diff changeset
   255
    """
184
92aebc6b533c fix interface_selector bug
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 162
diff changeset
   256
    # XXX this selector can be refactored : extract the code testing
92aebc6b533c fix interface_selector bug
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parents: 162
diff changeset
   257
    #     for entity schema / interface compliance
0
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   258
    score = 0
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   259
    # check 'accepts' to give priority to more specific classes
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   260
    if row is None:
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   261
        for etype in rset.column_types(col or 0):
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   262
            eclass = cls.vreg.etype_class(etype)
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   263
            escore = 0
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diff changeset
   264
            for iface in cls.accepts_interfaces:
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   265
                escore += iface.is_implemented_by(eclass)
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   266
            if not escore:
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   267
                return 0
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   268
            score += escore
184
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diff changeset
   269
            accepts = set(getattr(cls, 'accepts', ()))
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diff changeset
   270
            # if accepts is defined on the vobject, eclass must match
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diff changeset
   271
            if accepts:
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   272
                eschema = eclass.e_schema
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diff changeset
   273
                etypes = set([eschema] + eschema.ancestors())
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diff changeset
   274
                if accepts & etypes:
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   275
                    score += 2
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diff changeset
   276
                elif 'Any' not in accepts:
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   277
                    return 0
0
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   278
        return score + 1
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   279
    etype = rset.description[row][col or 0]
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   280
    if etype is None: # outer join
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   281
        return 0
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   282
    eclass = cls.vreg.etype_class(etype)
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   283
    for iface in cls.accepts_interfaces:
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diff changeset
   284
        score += iface.is_implemented_by(eclass)
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diff changeset
   285
    if score:
184
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diff changeset
   286
        accepts = set(getattr(cls, 'accepts', ()))
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diff changeset
   287
        # if accepts is defined on the vobject, eclass must match
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parents: 162
diff changeset
   288
        if accepts:
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diff changeset
   289
            eschema = eclass.e_schema
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diff changeset
   290
            etypes = set([eschema] + eschema.ancestors())
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diff changeset
   291
            if accepts & etypes:
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diff changeset
   292
                score += 1
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diff changeset
   293
            elif 'Any' not in accepts:
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diff changeset
   294
                return 0
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diff changeset
   295
        score += 1
0
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diff changeset
   296
    return score
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   297
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   298
@lltrace
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diff changeset
   299
def score_entity_selector(cls, req, rset, row=None, col=None, **kwargs):
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   300
    if row is None:
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diff changeset
   301
        rows = xrange(rset.rowcount)
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diff changeset
   302
    else:
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diff changeset
   303
        rows = (row,)
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diff changeset
   304
    for row in rows:
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diff changeset
   305
        try:
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diff changeset
   306
            score = cls.score_entity(rset.get_entity(row, col or 0))
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diff changeset
   307
        except DummyCursorError:
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diff changeset
   308
            # get a dummy cursor error, that means we are currently
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diff changeset
   309
            # using a dummy rset to list possible views for an entity
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diff changeset
   310
            # type, not for an actual result set. In that case, we
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parents:
diff changeset
   311
            # don't care of the value, consider the object as selectable
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parents:
diff changeset
   312
            return 1
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parents:
diff changeset
   313
        if not score:
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parents:
diff changeset
   314
            return 0
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parents:
diff changeset
   315
    return 1
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parents:
diff changeset
   316
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parents:
diff changeset
   317
@lltrace
237
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Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 236
diff changeset
   318
def accept_rset(cls, req, rset, row=None, col=None, **kwargs):
0
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parents:
diff changeset
   319
    """simply delegate to cls.accept_rset method"""
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parents:
diff changeset
   320
    return cls.accept_rset(req, rset, row=row, col=col)
237
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parents: 236
diff changeset
   321
accept_rset_selector = deprecated_function(accept_rset)
0
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parents:
diff changeset
   322
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parents:
diff changeset
   323
@lltrace
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parents:
diff changeset
   324
def but_etype_selector(cls, req, rset, row=None, col=None, **kwargs):
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parents:
diff changeset
   325
    """restrict the searchstate_accept_one_selector to exclude entity's type
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parents:
diff changeset
   326
    refered by the .etype attribute
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parents:
diff changeset
   327
    """
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parents:
diff changeset
   328
    if rset.description[row or 0][col or 0] == cls.etype:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   329
        return 0
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parents:
diff changeset
   330
    return 1
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parents:
diff changeset
   331
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parents:
diff changeset
   332
@lltrace
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parents:
diff changeset
   333
def etype_rtype_selector(cls, req, rset, row=None, col=None, **kwargs):
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parents:
diff changeset
   334
    """only check if the user has read access on the entity's type refered
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parents:
diff changeset
   335
    by the .etype attribute and on the relations's type refered by the
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   336
    .rtype attribute if set.
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parents:
diff changeset
   337
    """
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parents:
diff changeset
   338
    schema = cls.schema
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parents:
diff changeset
   339
    perm = getattr(cls, 'require_permission', 'read')
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   340
    if hasattr(cls, 'etype'):
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parents:
diff changeset
   341
        eschema = schema.eschema(cls.etype)
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parents:
diff changeset
   342
        if not (eschema.has_perm(req, perm) or eschema.has_local_role(perm)):
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parents:
diff changeset
   343
            return 0
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parents:
diff changeset
   344
    if hasattr(cls, 'rtype'):
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diff changeset
   345
        if not schema.rschema(cls.rtype).has_perm(req, perm):
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parents:
diff changeset
   346
            return 0
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parents:
diff changeset
   347
    return 1
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parents:
diff changeset
   348
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parents:
diff changeset
   349
@lltrace
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parents:
diff changeset
   350
def accept_rtype_selector(cls, req, rset, row=None, col=None, **kwargs):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   351
    if hasattr(cls, 'rtype'):
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parents:
diff changeset
   352
        if row is None:
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parents:
diff changeset
   353
            for etype in rset.column_types(col or 0):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   354
                if not cls.relation_possible(etype):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   355
                    return 0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   356
        elif not cls.relation_possible(rset.description[row][col or 0]):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   357
            return 0
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parents:
diff changeset
   358
    return 1
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parents:
diff changeset
   359
237
3df2e0ae2eba begin selector renaming (work in progress)
Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 236
diff changeset
   360
@lltrace
230
6e71adc5ccdd new has_related_entities selector
Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 215
diff changeset
   361
def has_related_entities(cls, req, rset, row=None, col=None, **kwargs):
6e71adc5ccdd new has_related_entities selector
Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 215
diff changeset
   362
    assert row is not None
6e71adc5ccdd new has_related_entities selector
Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 215
diff changeset
   363
    return bool(rset.get_entity(row, col).related(cls.rtype, role(cls)))
6e71adc5ccdd new has_related_entities selector
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parents: 215
diff changeset
   364
    
0
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parents:
diff changeset
   365
@lltrace
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parents:
diff changeset
   366
def one_has_relation_selector(cls, req, rset, row=None, col=None, **kwargs):
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parents:
diff changeset
   367
    """check if the user has read access on the relations's type refered by the
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parents:
diff changeset
   368
    .rtype attribute of the class, and if at least one entity type in the
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   369
    result set has this relation.
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   370
    """
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parents:
diff changeset
   371
    schema = cls.schema
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parents:
diff changeset
   372
    perm = getattr(cls, 'require_permission', 'read')
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parents:
diff changeset
   373
    if not schema.rschema(cls.rtype).has_perm(req, perm):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   374
        return 0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   375
    if row is None:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   376
        for etype in rset.column_types(col or 0):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   377
            if cls.relation_possible(etype):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   378
                return 1
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parents:
diff changeset
   379
    elif cls.relation_possible(rset.description[row][col or 0]):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   380
        return 1
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parents:
diff changeset
   381
    return 0
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parents:
diff changeset
   382
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   383
@lltrace
236
8ab9e72dd8f1 begin renaming for selectors, keeping bw compat
Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 230
diff changeset
   384
def match_user_group(cls, req, rset=None, row=None, col=None, **kwargs):
0
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parents:
diff changeset
   385
    """select according to user's groups"""
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   386
    if not cls.require_groups:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   387
        return 1
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   388
    user = req.user
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   389
    if user is None:
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parents:
diff changeset
   390
        return int('guests' in cls.require_groups)
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parents:
diff changeset
   391
    score = 0
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parents:
diff changeset
   392
    if 'owners' in cls.require_groups and rset:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   393
        if row is not None:
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parents:
diff changeset
   394
            eid = rset[row][col or 0]
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   395
            if user.owns(eid):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   396
                score = 1
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parents:
diff changeset
   397
        else:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   398
            score = all(user.owns(r[col or 0]) for r in rset)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   399
    score += user.matching_groups(cls.require_groups)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   400
    if score:
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parents:
diff changeset
   401
        # add 1 so that an object with one matching group take priority
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   402
        # on an object without require_groups
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   403
        return score + 1 
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   404
    return 0
236
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Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 230
diff changeset
   405
in_group_selector = deprecated_function(match_user_group)
0
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parents:
diff changeset
   406
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parents:
diff changeset
   407
@lltrace
236
8ab9e72dd8f1 begin renaming for selectors, keeping bw compat
Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 230
diff changeset
   408
def user_can_add_etype(cls, req, rset, row=None, col=None, **kwargs):
0
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parents:
diff changeset
   409
    """only check if the user has add access on the entity's type refered
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   410
    by the .etype attribute.
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parents:
diff changeset
   411
    """
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   412
    if not cls.schema.eschema(cls.etype).has_perm(req, 'add'):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   413
        return 0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   414
    return 1
236
8ab9e72dd8f1 begin renaming for selectors, keeping bw compat
Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 230
diff changeset
   415
add_etype_selector = deprecated_function(user_can_add_etype)
0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   416
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parents:
diff changeset
   417
@lltrace
236
8ab9e72dd8f1 begin renaming for selectors, keeping bw compat
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parents: 230
diff changeset
   418
def match_context_prop(cls, req, rset, row=None, col=None, context=None,
8ab9e72dd8f1 begin renaming for selectors, keeping bw compat
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parents: 230
diff changeset
   419
                       **kwargs):
0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   420
    propval = req.property_value('%s.%s.context' % (cls.__registry__, cls.id))
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   421
    if not propval:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   422
        propval = cls.context
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   423
    if context is not None and propval is not None and context != propval:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   424
        return 0
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parents:
diff changeset
   425
    return 1
236
8ab9e72dd8f1 begin renaming for selectors, keeping bw compat
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parents: 230
diff changeset
   426
contextprop_selector = deprecated_function(match_context_prop)
0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   427
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   428
@lltrace
236
8ab9e72dd8f1 begin renaming for selectors, keeping bw compat
Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 230
diff changeset
   429
def primary_view(cls, req, rset, row=None, col=None, view=None,
0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   430
                          **kwargs):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   431
    if view is not None and not view.is_primary():
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   432
        return 0
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parents:
diff changeset
   433
    return 1
236
8ab9e72dd8f1 begin renaming for selectors, keeping bw compat
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parents: 230
diff changeset
   434
primaryview_selector = deprecated_function(primary_view)
0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   435
142
0425ee84cfa6 add selector to test if result set is an object (for rss feed component)
Laure Bourgois <Laure.Bourgois@logilab.fr>
parents: 0
diff changeset
   436
def appobject_selectable(registry, oid):
161
328bc32b5701 repairing error from preceding commit
Laure Bourgois <Laure.Bourgois@logilab.fr>
parents: 157
diff changeset
   437
    """return a selector that will have a positive score if an object for the
328bc32b5701 repairing error from preceding commit
Laure Bourgois <Laure.Bourgois@logilab.fr>
parents: 157
diff changeset
   438
    given registry and object id is selectable for the input context
328bc32b5701 repairing error from preceding commit
Laure Bourgois <Laure.Bourgois@logilab.fr>
parents: 157
diff changeset
   439
    """
142
0425ee84cfa6 add selector to test if result set is an object (for rss feed component)
Laure Bourgois <Laure.Bourgois@logilab.fr>
parents: 0
diff changeset
   440
    @lltrace
0425ee84cfa6 add selector to test if result set is an object (for rss feed component)
Laure Bourgois <Laure.Bourgois@logilab.fr>
parents: 0
diff changeset
   441
    def selector(cls, req, rset, *args, **kwargs):
0425ee84cfa6 add selector to test if result set is an object (for rss feed component)
Laure Bourgois <Laure.Bourgois@logilab.fr>
parents: 0
diff changeset
   442
        try:
0425ee84cfa6 add selector to test if result set is an object (for rss feed component)
Laure Bourgois <Laure.Bourgois@logilab.fr>
parents: 0
diff changeset
   443
            cls.vreg.select_object(registry, oid, req, rset, *args, **kwargs)
0425ee84cfa6 add selector to test if result set is an object (for rss feed component)
Laure Bourgois <Laure.Bourgois@logilab.fr>
parents: 0
diff changeset
   444
            return 1
0425ee84cfa6 add selector to test if result set is an object (for rss feed component)
Laure Bourgois <Laure.Bourgois@logilab.fr>
parents: 0
diff changeset
   445
        except NoSelectableObject:
0425ee84cfa6 add selector to test if result set is an object (for rss feed component)
Laure Bourgois <Laure.Bourgois@logilab.fr>
parents: 0
diff changeset
   446
            return 0
0425ee84cfa6 add selector to test if result set is an object (for rss feed component)
Laure Bourgois <Laure.Bourgois@logilab.fr>
parents: 0
diff changeset
   447
    return selector
0425ee84cfa6 add selector to test if result set is an object (for rss feed component)
Laure Bourgois <Laure.Bourgois@logilab.fr>
parents: 0
diff changeset
   448
0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   449
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   450
# compound selectors ##########################################################
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parents:
diff changeset
   451
237
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Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 236
diff changeset
   452
nfentity_selector = chainall(nonempty_rset, _nfentity_selector)
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Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 236
diff changeset
   453
3df2e0ae2eba begin selector renaming (work in progress)
Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 236
diff changeset
   454
implement_interface = chainall(nfentity_selector, _interface_selector)
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parents: 236
diff changeset
   455
interface_selector = deprecated_function(implement_interface)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   456
237
3df2e0ae2eba begin selector renaming (work in progress)
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parents: 236
diff changeset
   457
accept = chainall(nfentity_selector, accept_rset_selector)
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Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 236
diff changeset
   458
accept_selector = deprecated_function(accept)
0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   459
237
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parents: 236
diff changeset
   460
accept_one_selector = chainall(one_line_rset, accept_selector)
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Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 236
diff changeset
   461
3df2e0ae2eba begin selector renaming (work in progress)
Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 236
diff changeset
   462
rqlcondition_selector = chainall(nfentity_selector, one_line_rset,
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   463
                                 _rqlcondition_selector)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   464
237
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parents: 236
diff changeset
   465
searchstate_accept_selector = chainall(nonempty_rset, searchstate_selector,
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   466
                                       accept_selector)
237
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parents: 236
diff changeset
   467
searchstate_accept_one_selector = chainall(nonempty_rset, searchstate_selector,
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   468
                                           accept_selector, rqlcondition_selector)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   469
searchstate_accept_one_but_etype_selector = chainall(searchstate_accept_one_selector,
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   470
                                                     but_etype_selector)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   471
237
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parents: 236
diff changeset
   472
#__all__ = [name for name in globals().keys() if name.endswith('selector')]
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parents: 236
diff changeset
   473
#__all__ += ['chainall', 'chainfirst']