web/action.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Fri, 30 Apr 2010 14:34:56 +0200
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# copyright 2003-2010 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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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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"""abstract action classes for CubicWeb web client
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"""
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__docformat__ = "restructuredtext en"
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_ = unicode
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from cubicweb import target
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from cubicweb.selectors import (partial_relation_possible, match_search_state,
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                                one_line_rset)
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from cubicweb.appobject import AppObject
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class Action(AppObject):
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    """abstract action. Handle the .search_states attribute to match
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    request search state.
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    """
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    __registry__ = 'actions'
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    __select__ = match_search_state('normal')
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    order = 99
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    category = 'moreactions'
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    # actions in category 'moreactions' can specify a sub-menu in which they should be filed
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    submenu = None
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    def actual_actions(self):
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        yield self
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    def fill_menu(self, box, menu):
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        """add action(s) to the given submenu of the given box"""
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        for action in self.actual_actions():
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            menu.append(box.box_action(action))
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    def url(self):
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        """return the url associated with this action"""
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        raise NotImplementedError
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    def html_class(self):
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        if self._cw.selected(self.url()):
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            return 'selected'
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        if self.category:
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            return 'box' + self.category.capitalize()
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    def build_action(self, title, path, **kwargs):
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        return UnregisteredAction(self._cw, self.cw_rset, title, path, **kwargs)
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class UnregisteredAction(Action):
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    """non registered action used to build boxes. Unless you set them
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    explicitly, .vreg and .schema attributes at least are None.
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    """
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    category = None
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    id = None
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    def __init__(self, req, rset, title, path, **kwargs):
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        Action.__init__(self, req, rset=rset)
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        self.title = req._(title)
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        self._path = path
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        self.__dict__.update(kwargs)
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    def url(self):
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        return self._path
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class LinkToEntityAction(Action):
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    """base class for actions consisting to create a new object with an initial
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    relation set to an entity.
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    Additionaly to EntityAction behaviour, this class is parametrized using
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    .rtype, .role and .target_etype attributes to check if the action apply and
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    if the logged user has access to it (see
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    :class:`~cubicweb.selectors.partial_relation_possible` selector
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    documentation for more information).
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    """
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    __select__ = (match_search_state('normal') & one_line_rset()
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                  & partial_relation_possible(action='add', strict=True))
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    submenu = 'addrelated'
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    def url(self):
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        try:
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            ttype = self.etype # deprecated in 3.6, already warned by the selector
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        except AttributeError:
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            ttype = self.target_etype
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        entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)
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        linkto = '%s:%s:%s' % (self.rtype, entity.eid, target(self))
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        return self._cw.build_url('add/%s' % ttype, __linkto=linkto,
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                                  __redirectpath=entity.rest_path(),
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                                  __redirectvid=self._cw.form.get('__redirectvid', ''))
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