web/facet.py
author Sylvain Thenault <sylvain.thenault@logilab.fr>
Wed, 07 Jan 2009 15:36:59 +0100
changeset 346 5bbb01a133ae
parent 203 60cd67acf7fd
child 368 84a5106840fa
permissions -rw-r--r--
add try except to avoid error w/ unsupported stuff, log it and return incomplete filter form
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"""contains utility functions and some visual component to restrict results of
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a search
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:organization: Logilab
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:copyright: 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 itertools import chain
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from copy import deepcopy
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from logilab.mtconverter import html_escape
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from logilab.common.graph import has_path
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from logilab.common.decorators import cached
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from logilab.common.compat import all
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from rql import parse, nodes
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from cubicweb import Unauthorized, typed_eid
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from cubicweb.common.selectors import contextprop_selector, one_has_relation_selector
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from cubicweb.common.registerers import priority_registerer
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from cubicweb.common.appobject import AppRsetObject
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from cubicweb.common.utils import AcceptMixIn
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from cubicweb.web.htmlwidgets import HTMLWidget
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## rqlst manipulation functions used by facets ################################
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def prepare_facets_rqlst(rqlst, args=None):
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    """prepare a syntax tree to generate facet filters
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    * remove ORDERBY clause
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    * cleanup selection (remove everything)
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    * undefine unnecessary variables
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    * set DISTINCT
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    * unset LIMIT/OFFSET
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    """
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    if len(rqlst.children) > 1:
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        raise NotImplementedError('FIXME: union not yet supported')
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    select = rqlst.children[0]
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    mainvar = filtered_variable(select)
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    select.set_limit(None)
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    select.set_offset(None)
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    baserql = select.as_string(kwargs=args)
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    # cleanup sort terms
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    select.remove_sort_terms()
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    # selection: only vocabulary entity
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    for term in select.selection[:]:
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        select.remove_selected(term)
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    # remove unbound variables which only have some type restriction
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    for dvar in select.defined_vars.values():
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        if not (dvar is mainvar or dvar.stinfo['relations']):
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            select.undefine_variable(dvar)
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    # global tree config: DISTINCT, LIMIT, OFFSET
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    select.set_distinct(True)
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    return mainvar, baserql
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def filtered_variable(rqlst):
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    vref = rqlst.selection[0].iget_nodes(nodes.VariableRef).next()
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    return vref.variable
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def get_facet(req, facetid, rqlst, mainvar):
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    return req.vreg.object_by_id('facets', facetid, req, rqlst=rqlst,
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                                 filtered_variable=mainvar)
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def filter_hiddens(w, **kwargs):
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    for key, val in kwargs.items():
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        w(u'<input type="hidden" name="%s" value="%s" />' % (
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            key, html_escape(val)))
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def _may_be_removed(rel, schema, mainvar):
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    """if the given relation may be removed from the tree, return the variable
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    on the other side of `mainvar`, else return None
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    Conditions:
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    * the relation is an attribute selection of the main variable
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    * the relation is optional relation linked to the main variable
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    * the relation is a mandatory relation linked to the main variable
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      without any restriction on the other variable
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    """
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    lhs, rhs = rel.get_variable_parts()
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    rschema = schema.rschema(rel.r_type)
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    if lhs.variable is mainvar:
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        try:
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            ovar = rhs.variable
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        except AttributeError:
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            # constant restriction
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            # XXX: X title LOWER(T) if it makes sense?
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            return None
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        if rschema.is_final():
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            if len(ovar.stinfo['relations']) == 1:
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                # attribute selection
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                return ovar
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            return None
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        opt = 'right'
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        cardidx = 0
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    elif getattr(rhs, 'variable', None) is mainvar:
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        ovar = lhs.variable
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        opt = 'left'
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        cardidx = 1
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    else:
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        # not directly linked to the main variable
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        return None
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    if rel.optional in (opt, 'both'):
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        # optional relation
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        return ovar
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    if all(rschema.rproperty(s, o, 'cardinality')[cardidx] in '1+'
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           for s,o in rschema.iter_rdefs()):
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        # mandatory relation without any restriction on the other variable
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        for orel in ovar.stinfo['relations']:
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            if rel is orel:
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                continue
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            if _may_be_removed(orel, schema, ovar) is None:
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                return None
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        return ovar
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    return None
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def _add_rtype_relation(rqlst, mainvar, rtype, role):
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    newvar = rqlst.make_variable()
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    if role == 'object':
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        rel = rqlst.add_relation(newvar, rtype, mainvar)
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    else:
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        rel = rqlst.add_relation(mainvar, rtype, newvar)
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    return newvar, rel
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def _prepare_vocabulary_rqlst(rqlst, mainvar, rtype, role):
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    """prepare a syntax tree to generate a filter vocabulary rql using the given
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    relation:
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    * create a variable to filter on this relation
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    * add the relation
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    * add the new variable to GROUPBY clause if necessary
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    * add the new variable to the selection
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    """
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    newvar, rel = _add_rtype_relation(rqlst, mainvar, rtype, role)
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    if rqlst.groupby:
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        rqlst.add_group_var(newvar)
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    rqlst.add_selected(newvar)
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    return newvar, rel
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def _remove_relation(rqlst, rel, var):
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    """remove a constraint relation from the syntax tree"""
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    # remove the relation
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    rqlst.remove_node(rel)
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    # remove relations where the filtered variable appears on the
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    # lhs and rhs is a constant restriction
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    extra = []
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    for vrel in var.stinfo['relations']:
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        if vrel is rel:
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            continue
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        if vrel.children[0].variable is var:
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            if not vrel.children[1].get_nodes(nodes.Constant):
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                extra.append(vrel)
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            rqlst.remove_node(vrel)
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    return extra
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def _set_orderby(rqlst, newvar, sortasc, sortfuncname):
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    if sortfuncname is None:
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        rqlst.add_sort_var(newvar, sortasc)
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    else:
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        vref = nodes.variable_ref(newvar)
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        vref.register_reference()
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        sortfunc = nodes.Function(sortfuncname)
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        sortfunc.append(vref)
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        term = nodes.SortTerm(sortfunc, sortasc)
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        rqlst.add_sort_term(term)
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def insert_attr_select_relation(rqlst, mainvar, rtype, role, attrname,
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                                sortfuncname=None, sortasc=True):
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    """modify a syntax tree to retrieve only relevant attribute `attr` of `var`"""
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    _cleanup_rqlst(rqlst, mainvar)
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    var, mainrel = _prepare_vocabulary_rqlst(rqlst, mainvar, rtype, role)
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    # not found, create one
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    attrvar = rqlst.make_variable()
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    attrrel = rqlst.add_relation(var, attrname, attrvar)
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    # if query is grouped, we have to add the attribute variable
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    if rqlst.groupby:
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        if not attrvar in rqlst.groupby:
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            rqlst.add_group_var(attrvar)
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    _set_orderby(rqlst, attrvar, sortasc, sortfuncname)
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    # add attribute variable to selection
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    rqlst.add_selected(attrvar)
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    # add is restriction if necessary
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    if not mainvar.stinfo['typerels']:
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        etypes = frozenset(sol[mainvar.name] for sol in rqlst.solutions)
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        rqlst.add_type_restriction(mainvar, etypes)
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    return var
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def _cleanup_rqlst(rqlst, mainvar):
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    """cleanup tree from unnecessary restriction:
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    * attribute selection
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    * optional relations linked to the main variable
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    * mandatory relations linked to the main variable
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    """
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   197
    if rqlst.where is None:
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        return
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   199
    schema = rqlst.root.schema
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    toremove = set()
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    vargraph = deepcopy(rqlst.vargraph) # graph representing links between variable
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    for rel in rqlst.where.get_nodes(nodes.Relation):
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        ovar = _may_be_removed(rel, schema, mainvar)
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        if ovar is not None:
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            toremove.add(ovar)
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   206
    removed = set()
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   207
    while toremove:
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        trvar = toremove.pop()
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        trvarname = trvar.name
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        # remove paths using this variable from the graph
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        linkedvars = vargraph.pop(trvarname)
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        for ovarname in linkedvars:
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            vargraph[ovarname].remove(trvarname)
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        # remove relation using this variable
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        for rel in chain(trvar.stinfo['relations'], trvar.stinfo['typerels']):
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            if rel in removed:
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                # already removed
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                continue
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            rqlst.remove_node(rel)
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            removed.add(rel)
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        # cleanup groupby clause
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   222
        if rqlst.groupby:
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   223
            for vref in rqlst.groupby[:]:
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                if vref.name == trvarname:
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                    rqlst.remove_group_var(vref)
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        # we can also remove all variables which are linked to this variable
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        # and have no path to the main variable
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        for ovarname in linkedvars:
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            if not has_path(vargraph, ovarname, mainvar.name):
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                toremove.add(rqlst.defined_vars[ovarname])            
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   234
## base facet classes #########################################################
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class AbstractFacet(AcceptMixIn, AppRsetObject):
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    __registerer__ = priority_registerer
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    __abstract__ = True
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    __registry__ = 'facets'
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    property_defs = {
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        _('visible'): dict(type='Boolean', default=True,
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                           help=_('display the box or not')),
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        _('order'):   dict(type='Int', default=99,
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                           help=_('display order of the box')),
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        _('context'): dict(type='String', default=None,
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                           # None <-> both
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                           vocabulary=(_('tablefilter'), _('facetbox'), None),
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                           help=_('context where this box should be displayed')),
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   248
        }
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    visible = True
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    context = None
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    needs_update = False
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    start_unfolded = True
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   253
    
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    @classmethod
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    def selected(cls, req, rset=None, rqlst=None, context=None,
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                 filtered_variable=None):
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        assert rset is not None or rqlst is not None
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        assert filtered_variable
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        instance = super(AbstractFacet, cls).selected(req, rset)
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        #instance = AppRsetObject.selected(req, rset)
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        #instance.__class__ = cls
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        # facet retreived using `object_by_id` from an ajax call
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        if rset is None:
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            instance.init_from_form(rqlst=rqlst)
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        # facet retreived from `select` using the result set to filter
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        else:
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            instance.init_from_rset()
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        instance.filtered_variable = filtered_variable
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        return instance
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    def init_from_rset(self):
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        self.rqlst = self.rset.syntax_tree().children[0]
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    def init_from_form(self, rqlst):
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        self.rqlst = rqlst
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    @property
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    def operator(self):
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        # OR between selected values by default
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        return self.req.form.get(self.id + '_andor', 'OR')
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    def get_widget(self):
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        """return the widget instance to use to display this facet
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        """
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        raise NotImplementedError
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    def add_rql_restrictions(self):
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        """add restriction for this facet into the rql syntax tree"""
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        raise NotImplementedError
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class VocabularyFacet(AbstractFacet):
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    needs_update = True
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    def get_widget(self):
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        """return the widget instance to use to display this facet
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        default implentation expects a .vocabulary method on the facet and
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        return a combobox displaying this vocabulary
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        """
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        vocab = self.vocabulary()
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        if len(vocab) <= 1:
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   303
            return None
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        wdg = FacetVocabularyWidget(self)
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        selected = frozenset(typed_eid(eid) for eid in self.req.list_form_param(self.id))
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        for label, value in vocab:
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   307
            if value is None:
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   308
                wdg.append(FacetSeparator(label))
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   309
            else:
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                wdg.append(FacetItem(self.req, label, value, value in selected))
0
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   311
        return wdg
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   312
    
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   313
    def vocabulary(self):
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        """return vocabulary for this facet, eg a list of 2-uple (label, value)
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   315
        """
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   316
        raise NotImplementedError
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   317
    
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   318
    def possible_values(self):
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   319
        """return a list of possible values (as string since it's used to
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   320
        compare to a form value in javascript) for this facet
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   321
        """
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   322
        raise NotImplementedError
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   323
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   324
    def support_and(self):
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   325
        return False
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   326
    
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   327
    def rqlexec(self, rql, args=None, cachekey=None):
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   328
        try:
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   329
            return self.req.execute(rql, args, cachekey)
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   330
        except Unauthorized:
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   331
            return []
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   332
        
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   333
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   334
class RelationFacet(VocabularyFacet):
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   335
    __selectors__ = (one_has_relation_selector, contextprop_selector)
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   336
    # class attributes to configure the relation facet
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   337
    rtype = None
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   338
    role = 'subject'
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   339
    target_attr = 'eid'
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   340
    # set this to a stored procedure name if you want to sort on the result of
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   341
    # this function's result instead of direct value
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   342
    sortfunc = None
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   343
    # ascendant/descendant sorting
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   344
    sortasc = True
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   345
    
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   346
    @property
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   347
    def title(self):
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   348
        return display_name(self.req, self.rtype, form=self.role)        
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   349
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   350
    def vocabulary(self):
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   351
        """return vocabulary for this facet, eg a list of 2-uple (label, value)
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diff changeset
   352
        """
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diff changeset
   353
        rqlst = self.rqlst
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   354
        rqlst.save_state()
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diff changeset
   355
        try:
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diff changeset
   356
            mainvar = self.filtered_variable
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diff changeset
   357
            insert_attr_select_relation(rqlst, mainvar, self.rtype, self.role,
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diff changeset
   358
                                        self.target_attr, self.sortfunc, self.sortasc)
346
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diff changeset
   359
            try:
5bbb01a133ae add try except to avoid error w/ unsupported stuff, log it and return incomplete filter form
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diff changeset
   360
                rset = self.rqlexec(rqlst.as_string(), self.rset.args, self.rset.cachekey)
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diff changeset
   361
            except:
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diff changeset
   362
                self.exception('error while getting vocabulary for %s, rql: %s',
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diff changeset
   363
                               self, rqlst.as_string())
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diff changeset
   364
                return ()
0
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diff changeset
   365
        finally:
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diff changeset
   366
            rqlst.recover()
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diff changeset
   367
        return self.rset_vocabulary(rset)
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diff changeset
   368
    
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diff changeset
   369
    def possible_values(self):
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diff changeset
   370
        """return a list of possible values (as string since it's used to
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diff changeset
   371
        compare to a form value in javascript) for this facet
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parents:
diff changeset
   372
        """
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diff changeset
   373
        rqlst = self.rqlst
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diff changeset
   374
        rqlst.save_state()
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diff changeset
   375
        try:
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diff changeset
   376
            _cleanup_rqlst(rqlst, self.filtered_variable)
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diff changeset
   377
            _prepare_vocabulary_rqlst(rqlst, self.filtered_variable, self.rtype, self.role)
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diff changeset
   378
            return [str(x) for x, in self.rqlexec(rqlst.as_string())]
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diff changeset
   379
        finally:
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parents:
diff changeset
   380
            rqlst.recover()
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parents:
diff changeset
   381
    
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diff changeset
   382
    def rset_vocabulary(self, rset):
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diff changeset
   383
        _ = self.req._
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diff changeset
   384
        return [(_(label), eid) for eid, label in rset]
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parents:
diff changeset
   385
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diff changeset
   386
    @cached
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parents:
diff changeset
   387
    def support_and(self):
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parents:
diff changeset
   388
        rschema = self.schema.rschema(self.rtype)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   389
        if self.role == 'subject':
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   390
            cardidx = 0
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parents:
diff changeset
   391
        else:
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parents:
diff changeset
   392
            cardidx = 1
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parents:
diff changeset
   393
        # XXX when called via ajax, no rset to compute possible types
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parents:
diff changeset
   394
        possibletypes = self.rset and self.rset.column_types(0)
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parents:
diff changeset
   395
        for subjtype, objtype in rschema.iter_rdefs():
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   396
            if possibletypes is not None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   397
                if self.role == 'subject':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   398
                    if not subjtype in possibletypes:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   399
                        continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   400
                elif not objtype in possibletypes:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   401
                    continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   402
            if rschema.rproperty(subjtype, objtype, 'cardinality')[cardidx] in '+*':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   403
                return True
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   404
        return False
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   405
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   406
    def add_rql_restrictions(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   407
        """add restriction for this facet into the rql syntax tree"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   408
        value = self.req.form.get(self.id)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   409
        if not value:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   410
            return
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   411
        mainvar = self.filtered_variable
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   412
        restrvar = _add_rtype_relation(self.rqlst, mainvar, self.rtype, self.role)[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   413
        if isinstance(value, basestring):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   414
            # only one value selected
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   415
            self.rqlst.add_eid_restriction(restrvar, value)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   416
        elif self.operator == 'OR':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   417
            #  multiple values with OR operator
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   418
            # set_distinct only if rtype cardinality is > 1
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   419
            if self.support_and():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   420
                self.rqlst.set_distinct(True)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   421
            self.rqlst.add_eid_restriction(restrvar, value)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   422
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   423
            # multiple values with AND operator
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   424
            self.rqlst.add_eid_restriction(restrvar, value.pop())
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   425
            while value:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   426
                restrvar = _add_rtype_relation(self.rqlst, mainvar, self.rtype, self.role)[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   427
                self.rqlst.add_eid_restriction(restrvar, value.pop())
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   428
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   429
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   430
class AttributeFacet(RelationFacet):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   431
    # attribute type
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   432
    attrtype = 'String'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   433
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   434
    def vocabulary(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   435
        """return vocabulary for this facet, eg a list of 2-uple (label, value)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   436
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   437
        rqlst = self.rqlst
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   438
        rqlst.save_state()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   439
        try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   440
            mainvar = self.filtered_variable
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   441
            _cleanup_rqlst(rqlst, mainvar)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   442
            newvar, rel = _prepare_vocabulary_rqlst(rqlst, mainvar, self.rtype, self.role)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   443
            _set_orderby(rqlst, newvar, self.sortasc, self.sortfunc)
346
5bbb01a133ae add try except to avoid error w/ unsupported stuff, log it and return incomplete filter form
Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 203
diff changeset
   444
            try:
5bbb01a133ae add try except to avoid error w/ unsupported stuff, log it and return incomplete filter form
Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 203
diff changeset
   445
                rset = self.rqlexec(rqlst.as_string(), self.rset.args, self.rset.cachekey)
5bbb01a133ae add try except to avoid error w/ unsupported stuff, log it and return incomplete filter form
Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 203
diff changeset
   446
            except:
5bbb01a133ae add try except to avoid error w/ unsupported stuff, log it and return incomplete filter form
Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 203
diff changeset
   447
                self.exception('error while getting vocabulary for %s, rql: %s',
5bbb01a133ae add try except to avoid error w/ unsupported stuff, log it and return incomplete filter form
Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 203
diff changeset
   448
                               self, rqlst.as_string())
5bbb01a133ae add try except to avoid error w/ unsupported stuff, log it and return incomplete filter form
Sylvain Thenault <sylvain.thenault@logilab.fr>
parents: 203
diff changeset
   449
                return ()
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   450
        finally:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   451
            rqlst.recover()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   452
        return self.rset_vocabulary(rset)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   453
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   454
    def rset_vocabulary(self, rset):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   455
        _ = self.req._
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   456
        return [(_(value), value) for value, in rset]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   457
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   458
    def support_and(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   459
        return False
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   460
            
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   461
    def add_rql_restrictions(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   462
        """add restriction for this facet into the rql syntax tree"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   463
        value = self.req.form.get(self.id)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   464
        if not value:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   465
            return
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   466
        mainvar = self.filtered_variable
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   467
        self.rqlst.add_constant_restriction(mainvar, self.rtype, value,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   468
                                            self.attrtype)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   469
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   470
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   471
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   472
class FilterRQLBuilder(object):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   473
    """called by javascript to get a rql string from filter form"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   474
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   475
    def __init__(self, req):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   476
        self.req = req
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   477
                
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   478
    def build_rql(self):#, tablefilter=False):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   479
        form = self.req.form
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   480
        facetids = form['facets'].split(',')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   481
        select = parse(form['baserql']).children[0] # XXX Union unsupported yet
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   482
        mainvar = filtered_variable(select)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   483
        toupdate = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   484
        for facetid in facetids:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   485
            facet = get_facet(self.req, facetid, select, mainvar)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   486
            facet.add_rql_restrictions()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   487
            if facet.needs_update:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   488
                toupdate.append(facetid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   489
        return select.as_string(), toupdate
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   490
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   491
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   492
## html widets ################################################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   493
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   494
class FacetVocabularyWidget(HTMLWidget):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   495
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   496
    def __init__(self, facet):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   497
        self.facet = facet
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   498
        self.items = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   499
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   500
    def append(self, item):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   501
        self.items.append(item)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   502
            
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   503
    def _render(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   504
        title = html_escape(self.facet.title)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   505
        facetid = html_escape(self.facet.id)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   506
        self.w(u'<div id="%s" class="facet">\n' % facetid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   507
        self.w(u'<div class="facetTitle" cubicweb:facetName="%s">%s</div>\n' %
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   508
               (html_escape(facetid), title))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   509
        if self.facet.support_and():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   510
            _ = self.facet.req._
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   511
            self.w(u'''<select name="%s" class="radio facetOperator" title="%s">
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   512
  <option value="OR">%s</option>
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   513
  <option value="AND">%s</option>
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   514
</select>''' % (facetid + '_andor', _('and/or between different values'),
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   515
                _('OR'), _('AND')))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   516
        if self.facet.start_unfolded:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   517
            cssclass = ''
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   518
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   519
            cssclass = ' hidden'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   520
        self.w(u'<div class="facetBody%s">\n' % cssclass)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   521
        for item in self.items:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   522
            item.render(self.w)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   523
        self.w(u'</div>\n')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   524
        self.w(u'</div>\n')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   525
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   526
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   527
class FacetStringWidget(HTMLWidget):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   528
    def __init__(self, facet):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   529
        self.facet = facet
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   530
        self.value = None
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   531
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   532
    def _render(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   533
        title = html_escape(self.facet.title)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   534
        facetid = html_escape(self.facet.id)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   535
        self.w(u'<div id="%s" class="facet">\n' % facetid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   536
        self.w(u'<div class="facetTitle" cubicweb:facetName="%s">%s</div>\n' %
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   537
               (facetid, title))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   538
        self.w(u'<input name="%s" type="text" value="%s" />\n' % (facetid, self.value or u''))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   539
        self.w(u'</div>\n')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   540
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   541
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   542
class FacetItem(HTMLWidget):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   543
203
60cd67acf7fd FacetItem now takes req as first parameter of __init__, THIS IS BACKWARD INCOMPATIBLE
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 0
diff changeset
   544
    selected_img = "black-check.png"
60cd67acf7fd FacetItem now takes req as first parameter of __init__, THIS IS BACKWARD INCOMPATIBLE
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 0
diff changeset
   545
    unselected_img = "no-check-no-border.png"
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   546
203
60cd67acf7fd FacetItem now takes req as first parameter of __init__, THIS IS BACKWARD INCOMPATIBLE
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 0
diff changeset
   547
    def __init__(self, req, label, value, selected=False):
60cd67acf7fd FacetItem now takes req as first parameter of __init__, THIS IS BACKWARD INCOMPATIBLE
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 0
diff changeset
   548
        self.req = req
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   549
        self.label = label
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   550
        self.value = value
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   551
        self.selected = selected
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   552
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   553
    def _render(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   554
        if self.selected:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   555
            cssclass = ' facetValueSelected'
203
60cd67acf7fd FacetItem now takes req as first parameter of __init__, THIS IS BACKWARD INCOMPATIBLE
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 0
diff changeset
   556
            imgsrc = self.req.datadir_url + self.selected_img
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   557
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   558
            cssclass = ''
203
60cd67acf7fd FacetItem now takes req as first parameter of __init__, THIS IS BACKWARD INCOMPATIBLE
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 0
diff changeset
   559
            imgsrc = self.req.datadir_url + self.unselected_img            
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   560
        self.w(u'<div class="facetValue facetCheckBox%s" cubicweb:value="%s">\n'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   561
               % (cssclass, html_escape(unicode(self.value))))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   562
        self.w(u'<img src="%s" />&nbsp;' % imgsrc)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   563
        self.w(u'<a href="javascript: {}">%s</a>' % html_escape(self.label))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   564
        self.w(u'</div>')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   565
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   566
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   567
class FacetSeparator(HTMLWidget):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   568
    def __init__(self, label=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   569
        self.label = label or u'&nbsp;'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   570
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   571
    def _render(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   572
        pass
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   573