"""an helper class to display CubicWeb schema using ureports
:organization: Logilab
:copyright: 2001-2008 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
"""
__docformat__ = "restructuredtext en"
from logilab.common.ureports import Section, Title, Table, Link, Span, Text
from yams.schema2dot import CARD_MAP
_ = unicode
I18NSTRINGS = [_('read'), _('add'), _('delete'), _('update'), _('order')]
class SchemaViewer(object):
"""return an ureport layout for some part of a schema"""
def __init__(self, req=None, encoding=None):
self.req = req
if req is not None:
self.req.add_css('cubicweb.schema.css')
self._possible_views = req.vreg.possible_views
if not encoding:
encoding = req.encoding
else:
self._possible_views = lambda x: ()
self.encoding = encoding
def format_acls(self, schema, access_types):
"""return a layout displaying access control lists"""
data = [self.req._('access type'), self.req._('groups')]
for access_type in access_types:
data.append(self.req._(access_type))
acls = [self.req._(group) for group in schema.get_groups(access_type)]
acls += (rqlexp.expression for rqlexp in schema.get_rqlexprs(access_type))
data.append(', '.join(acls))
return Section(children=(Table(cols=2, cheaders=1, rheaders=1, children=data),),
klass='acl')
def visit_schema(self, schema, display_relations=0,
skiprels=(), skipmeta=True):
"""get a layout for a whole schema"""
title = Title(self.req._('Schema %s') % schema.name,
klass='titleUnderline')
layout = Section(children=(title,))
esection = Section(children=(Title(self.req._('Entities'),
klass='titleUnderline'),))
layout.append(esection)
entities = [eschema for eschema in schema.entities()
if not eschema.is_final()]
if skipmeta:
entities = [eschema for eschema in entities
if not eschema.meta]
keys = [(eschema.type, eschema) for eschema in entities]
for key, eschema in sorted(keys):
esection.append(self.visit_entityschema(eschema, skiprels))
if display_relations:
title = Title(self.req._('Relations'), klass='titleUnderline')
rsection = Section(children=(title,))
layout.append(rsection)
relations = [rschema for rschema in schema.relations()
if not (rschema.is_final() or rschema.type in skiprels)]
if skipmeta:
relations = [rschema for rschema in relations
if not rschema.meta]
keys = [(rschema.type, rschema) for rschema in relations]
for key, rschema in sorted(keys):
relstr = self.visit_relationschema(rschema)
rsection.append(relstr)
return layout
def _entity_attributes_data(self, eschema):
_ = self.req._
data = [_('attribute'), _('type'), _('default'), _('constraints')]
for rschema, aschema in eschema.attribute_definitions():
if not (rschema.has_local_role('read') or rschema.has_perm(self.req, 'read')):
continue
aname = rschema.type
if aname == 'eid':
continue
data.append('%s (%s)' % (aname, _(aname)))
data.append(_(aschema.type))
defaultval = eschema.default(aname)
if defaultval is not None:
default = self.to_string(defaultval)
elif eschema.rproperty(rschema, 'cardinality')[0] == '1':
default = _('required field')
else:
default = ''
data.append(default)
constraints = rschema.rproperty(eschema.type, aschema.type,
'constraints')
data.append(', '.join(str(constr) for constr in constraints))
return data
def eschema_link_url(self, eschema):
return self.req.build_url('eetype/%s?vid=eschema' % eschema)
def rschema_link_url(self, rschema):
return self.req.build_url('ertype/%s?vid=eschema' % rschema)
def possible_views(self, etype):
rset = self.req.etype_rset(etype)
return [v for v in self._possible_views(self.req, rset)
if v.category != 'startupview']
def stereotype(self, name):
return Span((' <<%s>>' % name,), klass='stereotype')
def visit_entityschema(self, eschema, skiprels=()):
"""get a layout for an entity schema"""
etype = eschema.type
layout = Section(children=' ', klass='clear')
layout.append(Link(etype,' ' , id=etype)) # anchor
title = Link(self.eschema_link_url(eschema), etype)
if eschema.meta:
stereotype = self.stereotype('meta')
boxchild = [Section(children=(title, ' (%s)'%eschema.display_name(self.req), stereotype), klass='title')]
else:
boxchild = [Section(children=(title, ' (%s)'%eschema.display_name(self.req)), klass='title')]
table = Table(cols=4, rheaders=1,
children=self._entity_attributes_data(eschema))
boxchild.append(Section(children=(table,), klass='body'))
data = []
data.append(Section(children=boxchild, klass='box'))
data.append(Section(children='', klass='vl'))
data.append(Section(children='', klass='hl'))
t_vars = []
rels = []
first = True
for rschema, targetschemas, x in eschema.relation_definitions():
if rschema.type in skiprels:
continue
if not (rschema.has_local_role('read') or rschema.has_perm(self.req, 'read')):
continue
rschemaurl = self.rschema_link_url(rschema)
for oeschema in targetschemas:
label = rschema.type
if x == 'subject':
cards = rschema.rproperty(eschema, oeschema, 'cardinality')
else:
cards = rschema.rproperty(oeschema, eschema, 'cardinality')
cards = cards[::-1]
label = '%s %s (%s) %s' % (CARD_MAP[cards[1]], label, display_name(self.req, label, x), CARD_MAP[cards[0]])
rlink = Link(rschemaurl, label)
elink = Link(self.eschema_link_url(oeschema), oeschema.type)
if first:
t_vars.append(Section(children=(elink,), klass='firstvar'))
rels.append(Section(children=(rlink,), klass='firstrel'))
first = False
else:
t_vars.append(Section(children=(elink,), klass='var'))
rels.append(Section(children=(rlink,), klass='rel'))
data.append(Section(children=rels, klass='rels'))
data.append(Section(children=t_vars, klass='vars'))
layout.append(Section(children=data, klass='entityAttributes'))
if eschema.is_final(): # stop here for final entities
return layout
_ = self.req._
if self.req.user.matching_groups('managers'):
layout.append(self.format_acls(eschema, ('read', 'add', 'delete', 'update')))
# possible views for this entity type
views = [_(view.title) for view in self.possible_views(etype)]
layout.append(Section(children=(Table(cols=1, rheaders=1,
children=[_('views')]+views),),
klass='views'))
return layout
def visit_relationschema(self, rschema, title=True):
"""get a layout for a relation schema"""
_ = self.req._
title = Link(self.rschema_link_url(rschema), rschema.type)
stereotypes = []
if rschema.meta:
stereotypes.append('meta')
if rschema.symetric:
stereotypes.append('symetric')
if rschema.inlined:
stereotypes.append('inlined')
title = Section(children=(title, ' (%s)'%rschema.display_name(self.req)), klass='title')
if stereotypes:
title.append(self.stereotype(','.join(stereotypes)))
layout = Section(children=(title,), klass='schema')
data = [_('from'), _('to')]
schema = rschema.schema
rschema_objects = rschema.objects()
if rschema_objects:
# might be empty
properties = [p for p in rschema.rproperty_defs(rschema_objects[0])
if not p in ('cardinality', 'composite', 'eid')]
else:
properties = []
data += [_(prop) for prop in properties]
cols = len(data)
done = set()
for subjtype, objtypes in rschema.associations():
for objtype in objtypes:
if (subjtype, objtype) in done:
continue
done.add((subjtype, objtype))
if rschema.symetric:
done.add((objtype, subjtype))
data.append(Link(self.eschema_link_url(schema[subjtype]), subjtype))
data.append(Link(self.eschema_link_url(schema[objtype]), objtype))
for prop in properties:
val = rschema.rproperty(subjtype, objtype, prop)
if val is None:
val = ''
elif isinstance(val, (list, tuple)):
val = ', '.join(str(v) for v in val)
elif val and isinstance(val, basestring):
val = _(val)
else:
val = str(val)
data.append(Text(val))
table = Table(cols=cols, rheaders=1, children=data)
layout.append(Section(children=(table,), klass='relationDefinition'))
if not self.req.cnx.anonymous_connection:
layout.append(self.format_acls(rschema, ('read', 'add', 'delete')))
layout.append(Section(children='', klass='clear'))
return layout
def to_string(self, value):
"""used to converte arbitrary values to encoded string"""
if isinstance(value, unicode):
return value.encode(self.encoding, 'replace')
return str(value)