[rql rewriting] handle case where we've and optional inlined relation in the original query. Also, we should append EXISTS even in subquery to avoid inserting duplicates in results
"""abstract component class and base components definition for CubicWeb web client
:organization: Logilab
:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
"""
__docformat__ = "restructuredtext en"
_ = unicode
from simplejson import dumps
from logilab.common.deprecation import class_renamed
from logilab.mtconverter import xml_escape
from cubicweb import role
from cubicweb.view import Component
from cubicweb.selectors import (
paginated_rset, one_line_rset, primary_view, match_context_prop,
partial_has_related_entities)
class EntityVComponent(Component):
"""abstract base class for additinal components displayed in content
headers and footer according to:
* the displayed entity's type
* a context (currently 'header' or 'footer')
it should be configured using .accepts, .etype, .rtype, .target and
.context class attributes
"""
__registry__ = 'contentnavigation'
__select__ = one_line_rset() & primary_view() & match_context_prop()
cw_property_defs = {
_('visible'): dict(type='Boolean', default=True,
help=_('display the component or not')),
_('order'): dict(type='Int', default=99,
help=_('display order of the component')),
_('context'): dict(type='String', default='navtop',
vocabulary=(_('navtop'), _('navbottom'),
_('navcontenttop'), _('navcontentbottom'),
_('ctxtoolbar')),
help=_('context where this component should be displayed')),
}
context = 'navcontentbottom'
def call(self, view=None):
return self.cell_call(0, 0, view=view)
def cell_call(self, row, col, view=None):
raise NotImplementedError()
class NavigationComponent(Component):
"""abstract base class for navigation components"""
__regid__ = 'navigation'
__select__ = paginated_rset()
cw_property_defs = {
_('visible'): dict(type='Boolean', default=True,
help=_('display the component or not')),
}
page_size_property = 'navigation.page-size'
start_param = '__start'
stop_param = '__stop'
page_link_templ = u'<span class="slice"><a href="%s" title="%s">%s</a></span>'
selected_page_link_templ = u'<span class="selectedSlice"><a href="%s" title="%s">%s</a></span>'
previous_page_link_templ = next_page_link_templ = page_link_templ
no_previous_page_link = u'<<'
no_next_page_link = u'>>'
def __init__(self, req, rset, **kwargs):
super(NavigationComponent, self).__init__(req, rset=rset, **kwargs)
self.starting_from = 0
self.total = rset.rowcount
def get_page_size(self):
try:
return self._page_size
except AttributeError:
page_size = self.cw_extra_kwargs.get('page_size')
if page_size is None:
if 'page_size' in self._cw.form:
page_size = int(self._cw.form['page_size'])
else:
page_size = self._cw.property_value(self.page_size_property)
self._page_size = page_size
return page_size
def set_page_size(self, page_size):
self._page_size = page_size
page_size = property(get_page_size, set_page_size)
def page_boundaries(self):
try:
stop = int(self._cw.form[self.stop_param]) + 1
start = int(self._cw.form[self.start_param])
except KeyError:
start, stop = 0, self.page_size
if start >= len(self.cw_rset):
start, stop = 0, self.page_size
self.starting_from = start
return start, stop
def clean_params(self, params):
if self.start_param in params:
del params[self.start_param]
if self.stop_param in params:
del params[self.stop_param]
def page_url(self, path, params, start, stop):
params = dict(params)
params.update({self.start_param : start,
self.stop_param : stop,})
if path == 'json':
rql = params.pop('rql', self.cw_rset.printable_rql())
# latest 'true' used for 'swap' mode
url = 'javascript: replacePageChunk(%s, %s, %s, %s, true)' % (
dumps(params.get('divid', 'paginated-content')),
dumps(rql), dumps(params.pop('vid', None)), dumps(params))
else:
url = self._cw.build_url(path, **params)
return url
def page_link(self, path, params, start, stop, content):
url = xml_escape(self.page_url(path, params, start, stop))
if start == self.starting_from:
return self.selected_page_link_templ % (url, content, content)
return self.page_link_templ % (url, content, content)
def previous_link(self, path, params, content='<<', title=_('previous_results')):
start = self.starting_from
if not start :
return self.no_previous_page_link
start = max(0, start - self.page_size)
stop = start + self.page_size - 1
url = xml_escape(self.page_url(path, params, start, stop))
return self.previous_page_link_templ % (url, title, content)
def next_link(self, path, params, content='>>', title=_('next_results')):
start = self.starting_from + self.page_size
if start >= self.total:
return self.no_next_page_link
stop = start + self.page_size - 1
url = xml_escape(self.page_url(path, params, start, stop))
return self.next_page_link_templ % (url, title, content)
class RelatedObjectsVComponent(EntityVComponent):
"""a section to display some related entities"""
__select__ = EntityVComponent.__select__ & partial_has_related_entities()
vid = 'list'
def rql(self):
"""override this method if you want to use a custom rql query"""
return None
def cell_call(self, row, col, view=None):
rql = self.rql()
if rql is None:
entity = self.cw_rset.get_entity(row, col)
rset = entity.related(self.rtype, role(self))
else:
eid = self.cw_rset[row][col]
rset = self._cw.execute(self.rql(), {'x': eid}, 'x')
if not rset.rowcount:
return
self.w(u'<div class="%s">' % self.div_class())
self.w(u'<h4>%s</h4>\n' % self._cw._(self.title).capitalize())
self.wview(self.vid, rset)
self.w(u'</div>')
VComponent = class_renamed('VComponent', Component,
'VComponent is deprecated, use Component')
SingletonVComponent = class_renamed('SingletonVComponent', Component,
'SingletonVComponent is deprecated, use '
'Component and explicit registration control')