web/views/baseforms.py
author Sandrine Ribeau <sandrine.ribeau@logilab.fr>
Thu, 23 Apr 2009 11:58:11 -0700
changeset 1461 023b123ab76b
parent 978 536c748e7b3f
child 985 6a25c58a1c23
permissions -rw-r--r--
[doc] Splits initial set-up section in two sections => re-order part III.

"""Set of HTML automatic forms to create, delete, copy or edit a single entity
or a list of entities of the same type

:organization: Logilab
:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
"""
__docformat__ = "restructuredtext en"

from copy import copy

from simplejson import dumps

from logilab.mtconverter import html_escape
from logilab.common.decorators import cached

from cubicweb.interfaces import IWorkflowable
from cubicweb.common.utils import make_uid
from cubicweb.common.uilib import cut
from cubicweb.common.selectors import (accept_etype, match_kwargs,
                                    one_line_rset, implement_interface,
                                    match_form_params, accept)
from cubicweb.common.view import EntityView
from cubicweb.web import INTERNAL_FIELD_VALUE, stdmsgs, eid_param
from cubicweb.web.controller import NAV_FORM_PARAMETERS
from cubicweb.web.widgets import checkbox, InputWidget, ComboBoxWidget
from cubicweb.web.form import EntityForm, relation_id

_ = unicode

class DeleteConfForm(EntityForm):
    id = 'deleteconf'
    title = _('delete')
    domid = 'deleteconf'
    onsubmit = None
    # don't use navigation, all entities asked to be deleted should be displayed
    # else we will only delete the displayed page
    need_navigation = False
    
    def call(self):
        """ask for confirmation before real deletion"""
        _ = self.req._
        self.req.add_css('cubicweb.form.css')
        self.req.add_js('cubicweb.edition.js')
        self.w(u'<script type="text/javascript">updateMessage(\'%s\');</script>\n' % _('this action is not reversible!'))
        # XXX above message should have style of a warning
        self.w(u'<h4>%s</h4>\n' % _('Do you want to delete the following element(s) ?'))
        if self.onsubmit:
            self.w(u'<form id="deleteconf" action="%s" onsubmit="%s" method="post">'
                   % (self.build_url(), self.onsubmit))
        else:
            self.w(u'<form id="deleteconf" action="%s" method="post">'
                   % (self.build_url()))
            
        self.w(u'<fieldset>\n')
        self.display_rset()
        #self.w(u'<input type="hidden" name="rql" value="%s"/>' % self.req.form['rql'])
        self.w(u'<input type="hidden" name="__form_id" value="%s"/>' % self.id)
        self.w(self.button_delete(label=stdmsgs.YES))
        self.w(self.button_cancel(label=stdmsgs.NO))
        for param in NAV_FORM_PARAMETERS:
            value = self.req.form.get(param)
            if value:
                self.w(u'<input type="hidden" name="%s" value="%s"/>' % (param, value))
        self.w(u'</fieldset></form>\n')

    def display_rset(self):
        self.w(u'<ul>\n')
        done = set()
        for i in xrange(self.rset.rowcount):
            if self.rset[i][0] in done:
                continue
            done.add(self.rset[i][0])
            self.cell_call(i, 0)
        self.w(u'</ul>\n')
        
    def cell_call(self, row, col):
        entity = self.entity(row, col)
        self.w(u'<li>')
        self.w(u'<input type="hidden" name="eid" value="%s" />' % entity.eid)
        self.w(u'<input type="hidden" name="%s" value="%s"/>\n'
               % (eid_param('__type', entity.eid), self.rset.description[row][0]))
        self.w(u'<a href="%s">' % html_escape(entity.absolute_url()))
        # don't use outofcontext view or any other that may contain inline edition form
        self.w(html_escape(entity.view('textoutofcontext')))
        self.w(u'</a>')
        self.w(u'</li>')


class ChangeStateForm(EntityForm):
    id = 'statuschange'
    title = _('status change')

    __selectors__ = (implement_interface, match_form_params)
    accepts_interfaces = (IWorkflowable,)
    form_params = ('treid',)

    def cell_call(self, row, col, vid='secondary'):
        entity = self.entity(row, col)
        eid = entity.eid
        state = entity.in_state[0]
        transition = self.req.eid_rset(self.req.form['treid']).get_entity(0, 0)
        dest = transition.destination()
        self.req.add_js('cubicweb.edition.js')
        self.req.add_css('cubicweb.form.css')
        _ = self.req._
        self.w(self.error_message())
        self.w(u'<h4>%s %s</h4>\n' % (_(transition.name), entity.view('oneline')))
        msg = _('status will change from %(st1)s to %(st2)s') % {
            'st1': _(state.name),
            'st2': _(dest.name)}
        self.w(u'<p>%s</p>\n' % msg)
        self.w(u'<form action="%s" onsubmit="return freezeFormButtons(\'entityForm\');" method="post" id="entityForm">\n'
               % self.build_url('edit'))
        self.w(u'<div id="progress">%s</div>' % _('validating...'))
        self.w(u'<fieldset>\n')
        #self.w(u'<input id="errorurl" type="hidden" name="__errorurl" value="%s"/>\n'
        #       % html_escape(self.req.url()))
        self.w(u'<input type="hidden" name="__form_id" value="%s"/>\n' % self.id)
        self.w(u'<input type="hidden" name="eid" value="%s" />' % eid)
        self.w(u'<input type="hidden" name="%s" value="%s"/>\n'
               % (eid_param('__type', eid), entity.e_schema))
        self.w(u'<input type="hidden" name="%s" value="%s"/>\n'
               % (eid_param('state', eid), dest.eid))
        self.w(u'<input type="hidden" name="__redirectpath" value="%s"/>\n'
               % html_escape(self.redirectpath(entity)))
        self.fill_form(entity, state, dest)
        self.w(u'<input type="hidden" name="__method" value="set_state"/>\n')
        self.w(self.button_ok(label=stdmsgs.YES, tabindex=self.req.next_tabindex()))
        self.w(self.button_cancel(label=stdmsgs.NO, tabindex=self.req.next_tabindex()))
        self.w(u'</fieldset>\n')
        self.w(u'</form>')
        
    def fill_form(self, entity, state, dest):
        # hack to use the widget for comment_format
        trinfo = self.vreg.etype_class('TrInfo')(self.req, None)
        # widget are cached, copy it since we want to modify its name attribute
        wdg = trinfo.get_widget('comment_format')
        wdg.name = 'trcommentformat'
        # set a value in entity to avoid lookup for a non existant attribute...
        trinfo['trcommentformat'] = u''
        # comment format/content have to be grouped using the original entity eid
        wdg.rname = eid_param('trcommentformat', entity.eid)
        self.w(wdg.render_label(trinfo))
        self.w(wdg._edit_render(trinfo))
        self.w(u'<br/>\n')
        cformname = eid_param('trcomment', entity.eid)
        self.w(u'<label for="%s">%s</label>\n' % (cformname, self.req._('comment:')))
        self.w(u'<textarea rows="10" cols="80" name="%s" tabindex="%s"></textarea><br/>\n'
               % (cformname, self.req.next_tabindex()))

    def redirectpath(self, entity):
        return entity.rest_path()


class ClickAndEditForm(EntityForm):
    id = 'reledit'
    __selectors__ = (match_kwargs, )
    expected_kwargs = ('rtype',)

    #FIXME editableField class could be toggleable from userprefs

    EDITION_BODY = '''
<div class="editableField" id="%(divid)s"
      ondblclick="showInlineEditionForm(%(eid)s, '%(rtype)s', '%(divid)s')">%(value)s</div>
<form style="display: none;" onsubmit="return inlineValidateForm('%(divid)s-form', '%(rtype)s', '%(eid)s', '%(divid)s', %(reload)s);" id="%(divid)s-form" action="#">
<fieldset>
<input type="hidden" name="eid" value="%(eid)s" />
<input type="hidden" name="__maineid" value="%(eid)s" />
<input type="hidden" name="__type:%(eid)s" value="%(etype)s" />
%(attrform)s
</fieldset>
<div class="buttonbar">
%(ok)s
%(cancel)s
</div>
</form>
'''
    def cell_call(self, row, col, rtype=None, role='subject', reload=False):
        entity = self.entity(row, col)
        if getattr(entity, rtype) is None:
            value = self.req._('not specified')
        else:
            value = entity.printable_value(rtype)
        if not entity.has_perm('update'):
            self.w(value)
            return
        self.req.add_js( ('cubicweb.ajax.js', 'cubicweb.edition.js') )
        eid = entity.eid
        edit_key = make_uid('%s-%s' % (rtype, eid))
        divid = 'd%s' % edit_key
        widget = entity.get_widget(rtype, 'subject')
        eschema = entity.e_schema
        attrform = widget.edit_render(entity, useid='i%s' % edit_key)
        ok = (u'<input class="validateButton" type="submit" name="__action_apply" value="%s" tabindex="%s" />'
              % (self.req._(stdmsgs.BUTTON_OK), self.req.next_tabindex()))
        cancel = (u'<input class="validateButton" type="button" '
                  'value="%s" onclick="cancelInlineEdit(%s, \'%s\', \'%s\')"  tabindex="%s" />'
                  % (self.req._(stdmsgs.BUTTON_CANCEL), eid, rtype, divid,
                     self.req.next_tabindex()))
        self.w(self.EDITION_BODY % {
                'eid': eid,
                'rtype': rtype,
                'etype': entity.e_schema,
                'attrform': attrform,
                'action' : self.build_url('edit'), # NOTE: actually never gets called
                'ok': ok,
                'cancel': cancel,
                'value': value,
                'reload': dumps(reload),
                'divid': divid,
                })


class EditionForm(EntityForm):
    """primary entity edition form

    When generating a new attribute_input, the editor will look for a method
    named 'default_ATTRNAME' on the entity instance, where ATTRNAME is the
    name of the attribute being edited. You may use this feature to compute
    dynamic default values such as the 'tomorrow' date or the user's login
    being connected
    """    
    __selectors__ = (one_line_rset, accept)

    id = 'edition'
    title = _('edition')
    controller = 'edit'
    skip_relations = EntityForm.skip_relations.copy()
    
    EDITION_BODY = u'''\
 %(errormsg)s
<form id="%(formid)s" class="entityForm" cubicweb:target="eformframe"
      method="post" onsubmit="%(onsubmit)s" enctype="%(enctype)s" action="%(action)s">
 %(title)s
 <div id="progress">%(inprogress)s</div>
 <div class="iformTitle"><span>%(mainattrs_label)s</span></div>
 <div class="formBody"><fieldset>
 %(base)s
 %(attrform)s
 %(relattrform)s
</fieldset>
 %(relform)s
 </div>
 <table width="100%%">
  <tbody>
   <tr><td align="center">
     %(validate)s
   </td><td style="align: right; width: 50%%;">
     %(apply)s
     %(cancel)s
   </td></tr>
  </tbody>
 </table>
</form>
'''

    def cell_call(self, row, col, **kwargs):
        self.req.add_js( ('cubicweb.ajax.js', 'cubicweb.edition.js') )
        self.req.add_css('cubicweb.form.css')
        entity = self.complete_entity(row, col)
        self.edit_form(entity, kwargs)

    def edit_form(self, entity, kwargs):
        varmaker = self.req.get_page_data('rql_varmaker')
        if varmaker is None:
            varmaker = self.req.varmaker
            self.req.set_page_data('rql_varmaker', varmaker)
        self.varmaker = varmaker
        self.w(self.EDITION_BODY % self.form_context(entity, kwargs))

    def form_context(self, entity, kwargs):
        """returns the dictionnary used to fill the EDITION_BODY template

        If you create your own edition form, you can probably just override
        `EDITION_BODY` and `form_context`
        """
        if self.need_multipart(entity):
            enctype = 'multipart/form-data'
        else:
            enctype = 'application/x-www-form-urlencoded'
        self._hiddens = []
        if entity.eid is None:
            entity.eid = self.varmaker.next()
        # XXX (hack) action_title might need __linkto req's original value
        #            and widgets such as DynamicComboWidget might change it
        #            so we need to compute title before calling atttributes_form
        formtitle = self.action_title(entity)
        # be sure to call .*_form first so tabindexes are correct and inlined
        # fields errors are consumed
        if not entity.has_eid() or entity.has_perm('update'):
            attrform = self.attributes_form(entity, kwargs)
        else:
            attrform = ''
        inlineform = self.inline_entities_form(entity, kwargs)
        relform = self.relations_form(entity, kwargs)
        vindex = self.req.next_tabindex()
        aindex = self.req.next_tabindex()
        cindex = self.req.next_tabindex()
        self.add_hidden_web_behaviour_params(entity)
        _ = self.req._
        return {
            'formid'   : self.domid,
            'onsubmit' : self.on_submit(entity),
            'enctype'  : enctype,
            'errormsg' : self.error_message(),
            'action'   : self.build_url('validateform'),
            'eids'     : entity.has_eid() and [entity.eid] or [],
            'inprogress': _('validating...'),
            'title'    : formtitle,
            'mainattrs_label' : _('main informations'),
            'reseturl' : self.redirect_url(entity),
            'attrform' : attrform,
            'relform'  : relform,
            'relattrform': inlineform,
            'base'     : self.base_form(entity, kwargs),
            'validate' : self.button_ok(tabindex=vindex),
            'apply'    : self.button_apply(tabindex=aindex),
            'cancel'   : self.button_cancel(tabindex=cindex),
            }

    @property
    def formid(self):
        return self.id
    
    def action_title(self, entity):
        """form's title"""
        ptitle = self.req._(self.title)
        return u'<div class="formTitle"><span>%s %s</span></div>' % (
            entity.dc_type(), ptitle and '(%s)' % ptitle)


    def base_form(self, entity, kwargs):
        output = []
        for name, value, iid in self._hiddens:
            if isinstance(value, basestring):
                value = html_escape(value)
            if iid:
                output.append(u'<input id="%s" type="hidden" name="%s" value="%s" />'
                              % (iid, name, value))
            else:
                output.append(u'<input type="hidden" name="%s" value="%s" />'
                              % (name, value))
        return u'\n'.join(output)
                
    def add_hidden_web_behaviour_params(self, entity):
        """inserts hidden params controlling how errors and redirection
        should be handled
        """
        req = self.req
        self._hiddens.append( (u'__maineid', entity.eid, u'') )
        self._hiddens.append( (u'__errorurl', req.url(), u'errorurl') )
        self._hiddens.append( (u'__form_id', self.formid, u'') )
        for param in NAV_FORM_PARAMETERS:
            value = req.form.get(param)
            if value:
                self._hiddens.append( (param, value, u'') )
        msg = self.submited_message()
        # If we need to directly attach the new object to another one
        for linkto in req.list_form_param('__linkto'):
            self._hiddens.append( ('__linkto', linkto, '') )
            msg = '%s %s' % (msg, self.req._('and linked'))
        self._hiddens.append( ('__message', msg, '') )
        
    
    def attributes_form(self, entity, kwargs, include_eid=True):
        """create a form to edit entity's attributes"""
        html = []
        w = html.append
        eid = entity.eid
        wdg = entity.get_widget
        lines = (wdg(rschema, x) for rschema, x in self.editable_attributes(entity))
        if include_eid:
            self._hiddens.append( ('eid', entity.eid, '') )
        self._hiddens.append( (eid_param('__type', eid), entity.e_schema, '') )
        w(u'<table id="%s" class="%s" style="width:100%%;">' %
          (kwargs.get('tab_id', 'entityForm%s' % eid),
           kwargs.get('tab_class', 'attributeForm')))
        for widget in lines:
            w(u'<tr>\n<th class="labelCol">%s</th>' % widget.render_label(entity))
            error = widget.render_error(entity)
            if error:
                w(u'<td class="error" style="width:100%;">')
            else:
                w(u'<td style="width:100%;">')
            if error:
                w(error)
            w(widget.edit_render(entity))
            w(widget.render_help(entity))
            w(u'</td>\n</tr>')
        w(u'</table>')
        return u'\n'.join(html)

    def editable_attributes(self, entity):
        # XXX both (add, delete)
        return [(rschema, x) for rschema, _, x in entity.relations_by_category(('primary', 'secondary'), 'add')
                if rschema != 'eid']
    
    def relations_form(self, entity, kwargs):
        srels_by_cat = entity.srelations_by_category(('generic', 'metadata'), 'add')
        if not srels_by_cat:
            return u''
        req = self.req
        _ = self.req._
        label = u'%s :' % _('This %s' % entity.e_schema).capitalize()
        eid = entity.eid
        html = []
        w = html.append
        w(u'<fieldset class="subentity">')
        w(u'<legend class="iformTitle">%s</legend>' % label)
        w(u'<table id="relatedEntities">')
        for row in self.relations_table(entity):
            # already linked entities
            if row[2]:
                w(u'<tr><th class="labelCol">%s</th>' % row[0].display_name(req, row[1]))
                w(u'<td>')
                w(u'<ul>')
                for viewparams in row[2]:
                    w(u'<li class="invisible">%s<div id="span%s" class="%s">%s</div></li>'
                      % (viewparams[1], viewparams[0], viewparams[2], viewparams[3]))
                if not self.force_display and self.maxrelitems < len(row[2]):
                    w(u'<li class="invisible">%s</li>' % self.force_display_link())
                w(u'</ul>')
                w(u'</td>')
                w(u'</tr>')
        pendings = list(self.restore_pending_inserts(entity))
        if not pendings:
            w(u'<tr><th>&nbsp;</th><td>&nbsp;</td></tr>')
        else:
            for row in pendings:
                # soon to be linked to entities
                w(u'<tr id="tr%s">' % row[1])
                w(u'<th>%s</th>' % row[3])
                w(u'<td>')
                w(u'<a class="handle" title="%s" href="%s">[x]</a>' %
                  (_('cancel this insert'), row[2]))
                w(u'<a id="a%s" class="editionPending" href="%s">%s</a>'
                  % (row[1], row[4], html_escape(row[5])))
                w(u'</td>')
                w(u'</tr>')
        w(u'<tr id="relationSelectorRow_%s" class="separator">' % eid)
        w(u'<th class="labelCol">')
        w(u'<span>%s</span>' % _('add relation'))
        w(u'<select id="relationSelector_%s" tabindex="%s" onchange="javascript:showMatchingSelect(this.options[this.selectedIndex].value,%s);">'
          % (eid, req.next_tabindex(), html_escape(dumps(eid))))
        w(u'<option value="">%s</option>' % _('select a relation'))
        for i18nrtype, rschema, target in srels_by_cat:
            # more entities to link to
            w(u'<option value="%s_%s">%s</option>' % (rschema, target, i18nrtype))
        w(u'</select>')
        w(u'</th>')
        w(u'<td id="unrelatedDivs_%s"></td>' % eid)
        w(u'</tr>')
        w(u'</table>')
        w(u'</fieldset>')
        return '\n'.join(html)
        
    def inline_entities_form(self, entity, kwargs):
        """create a form to edit entity's inlined relations"""
        result = []
        _ = self.req._
        for rschema, targettypes, x in entity.relations_by_category('inlineview', 'add'):
            # show inline forms only if there's one possible target type
            # for rschema
            if len(targettypes) != 1:
                self.warning('entity related by the %s relation should have '
                             'inlined form but there is multiple target types, '
                             'dunno what to do', rschema)
                continue
            targettype = targettypes[0].type
            if self.should_inline_relation_form(entity, rschema, targettype, x):
                result.append(u'<div id="inline%sslot">' % rschema)
                existant = entity.has_eid() and entity.related(rschema)
                if existant:
                    # display inline-edition view for all existing related entities
                    result.append(self.view('inline-edition', existant, 
                                            ptype=entity.e_schema, peid=entity.eid,
                                            rtype=rschema, role=x, **kwargs))
                if x == 'subject':
                    card = rschema.rproperty(entity.e_schema, targettype, 'cardinality')[0]
                else:
                    card = rschema.rproperty(targettype, entity.e_schema, 'cardinality')[1]
                # there is no related entity and we need at least one : we need to
                # display one explicit inline-creation view
                if self.should_display_inline_relation_form(rschema, existant, card):
                    result.append(self.view('inline-creation', None, etype=targettype,
                                            peid=entity.eid, ptype=entity.e_schema,
                                            rtype=rschema, role=x, **kwargs))
                # we can create more than one related entity, we thus display a link
                # to add new related entities
                if self.should_display_add_inline_relation_link(rschema, existant, card):
                    divid = "addNew%s%s%s:%s" % (targettype, rschema, x, entity.eid)
                    result.append(u'<div class="inlinedform" id="%s" cubicweb:limit="true">'
                                  % divid)
                    js = "addInlineCreationForm('%s', '%s', '%s', '%s', '%s')" % (
                        entity.eid, entity.e_schema, targettype, rschema, x)
                    if card in '1?':
                        js = "toggleVisibility('%s'); %s" % (divid, js)
                    result.append(u'<a class="addEntity" id="add%s:%slink" href="javascript: %s" >+ %s.</a>'
                                  % (rschema, entity.eid, js,
                                     self.req.__('add a %s' % targettype)))
                    result.append(u'</div>')
                    result.append(u'<div class="trame_grise">&nbsp;</div>')
                result.append(u'</div>')
        return '\n'.join(result)

    # should_* method extracted to allow overriding
    
    def should_inline_relation_form(self, entity, rschema, targettype, role):
        return entity.rtags.is_inlined(rschema, targettype, role)

    def should_display_inline_relation_form(self, rschema, existant, card):
        return not existant and card in '1+'

    def should_display_add_inline_relation_link(self, rschema, existant, card):
        return not existant or card in '+*'
    
    def reset_url(self, entity):
        return entity.absolute_url()
    
    def on_submit(self, entity):
        return u'return freezeFormButtons(\'%s\')' % (self.domid)

    def submited_message(self):
        return self.req._('element edited')


    
class CreationForm(EditionForm):
    __selectors__ = (accept_etype, )
    id = 'creation'
    title = _('creation')
    
    def call(self, **kwargs):
        """creation view for an entity"""
        self.req.add_js( ('cubicweb.ajax.js', 'cubicweb.edition.js') )
        self.req.add_css('cubicweb.form.css')
        etype = kwargs.pop('etype', self.req.form.get('etype'))
        try:
            entity = self.vreg.etype_class(etype)(self.req, None, None)
        except:
            self.w(self.req._('no such entity type %s') % etype)
        else:
            self.edit_form(entity, kwargs)

    def action_title(self, entity):
        """custom form title if creating a entity with __linkto"""
        if '__linkto' in self.req.form:
            if isinstance(self.req.form['__linkto'], list):
                # XXX which one should be considered (case: add a ticket to a version in jpl)
                rtype, linkto_eid, role = self.req.form['__linkto'][0].split(':')
            else:
                rtype, linkto_eid, role = self.req.form['__linkto'].split(':')
            linkto_rset = self.req.eid_rset(linkto_eid)
            linkto_type = linkto_rset.description[0][0]
            if role == 'subject':
                title = self.req.__('creating %s (%s %s %s %%(linkto)s)' % (
                    entity.e_schema, entity.e_schema, rtype, linkto_type))
            else:
                title = self.req.__('creating %s (%s %%(linkto)s %s %s)' % (
                    entity.e_schema, linkto_type, rtype, entity.e_schema))
            msg = title % {'linkto' : self.view('incontext', linkto_rset)}
            return u'<div class="formTitle notransform"><span>%s</span></div>' % msg
        else:
            return super(CreationForm, self).action_title(entity)

    @property
    def formid(self):
        return 'edition'
    
    def relations_form(self, entity, kwargs):
        return u''

    def reset_url(self, entity=None):
        return self.build_url(self.req.form.get('etype', '').lower())
    
    def submited_message(self):
        return self.req._('element created')
    
    def url(self):
        """return the url associated with this view"""
        return self.create_url(self.req.form.get('etype'))


class InlineFormMixIn(object):

    @cached
    def card(self, etype):
        return self.rschema.rproperty(self.parent_schema, etype, 'cardinality')[0]
    
    def action_title(self, entity):
        return self.rschema.display_name(self.req, self.role)
        
    def add_hidden_web_behaviour_params(self, entity):
        pass
    
    def edit_form(self, entity, ptype, peid, rtype,
                  role='subject', **kwargs):
        self.rschema = self.schema.rschema(rtype)
        self.role = role        
        self.parent_schema = self.schema.eschema(ptype)
        self.parent_eid = peid
        super(InlineFormMixIn, self).edit_form(entity, kwargs)
    
    def should_inline_relation_form(self, entity, rschema, targettype, role):
        if rschema == self.rschema:
            return False
        return entity.rtags.is_inlined(rschema, targettype, role)

    @cached
    def keep_entity(self, entity):
        req = self.req
        # are we regenerating form because of a validation error ?
        erroneous_post = req.data.get('formvalues')
        if erroneous_post:
            cdvalues = req.list_form_param('%s:%s' % (self.rschema,
                                                      self.parent_eid),
                                           erroneous_post)
            if unicode(entity.eid) not in cdvalues:
                return False
        return True

    def form_context(self, entity, kwargs):
        ctx = super(InlineFormMixIn, self).form_context(entity, kwargs)
        _ = self.req._
        local_ctx = {'createmsg' : self.req.__('add a %s' % entity.e_schema),
                     'so': self.role[0], # 's' for subject, 'o' for object
                     'eid' : entity.eid,
                     'rtype' : self.rschema,
                     'parenteid' : self.parent_eid,
                     'parenttype' : self.parent_schema,
                     'etype' : entity.e_schema,
                     'novalue' : INTERNAL_FIELD_VALUE,
                     'removemsg' : self.req.__('remove this %s' % entity.e_schema),
                     'notice' : self.req._('click on the box to cancel the deletion'),
                     }
        ctx.update(local_ctx)
        return ctx


class InlineEntityCreationForm(InlineFormMixIn, CreationForm):
    id = 'inline-creation'
    __selectors__ = (match_kwargs, accept_etype)
    expected_kwargs = ('ptype', 'peid', 'rtype')
    
    EDITION_BODY = u'''\
<div id="div-%(parenteid)s-%(rtype)s-%(eid)s" class="inlinedform">
 <div class="iformBody">
 <div class="iformTitle"><span>%(title)s</span> #<span class="icounter">1</span> [<a href="javascript: removeInlineForm('%(parenteid)s', '%(rtype)s', '%(eid)s'); noop();">%(removemsg)s</a>]</div>
 <fieldset class="subentity">
 %(attrform)s
 %(relattrform)s
 </fieldset>
 </div>
 <fieldset class="hidden" id="fs-%(parenteid)s-%(rtype)s-%(eid)s">
%(base)s
 <input type="hidden" value="%(novalue)s" name="edit%(so)s-%(rtype)s:%(parenteid)s" />
 <input id="rel-%(parenteid)s-%(rtype)s-%(eid)s" type="hidden" value="%(eid)s" name="%(rtype)s:%(parenteid)s" />
 </fieldset>
</div>''' # do not insert trailing space or \n here !

    def call(self, etype, ptype, peid, rtype, role='subject', **kwargs):
        """
        :param etype: the entity type being created in the inline form
        :param parent: the parent entity hosting the inline form
        :param rtype: the relation bridging `etype` and `parent`
        :param role: the role played by the `parent` in the relation
        """
        self.req.add_css('cubicweb.form.css')
        try:
            entity = self.vreg.etype_class(etype)(self.req, None, None)
        except:
            self.w(self.req._('no such entity type %s') % etype)
            return
        self.edit_form(entity, ptype, peid, rtype, role, **kwargs)
    
    


class InlineEntityEditionForm(InlineFormMixIn, EditionForm):
    id = 'inline-edition'
    __selectors__ = (accept, match_kwargs)
    expected_kwargs = ('ptype', 'peid', 'rtype')
    
    EDITION_BODY = u'''\
<div onclick="restoreInlinedEntity('%(parenteid)s', '%(rtype)s', '%(eid)s')" id="div-%(parenteid)s-%(rtype)s-%(eid)s" class="inlinedform">   
<div id="notice-%(parenteid)s-%(rtype)s-%(eid)s" class="notice">%(notice)s</div>
<div class="iformTitle"><span>%(title)s</span>  #<span class="icounter">%(count)s</span> [<a href="javascript: removeInlinedEntity('%(parenteid)s', '%(rtype)s', '%(eid)s'); noop();">%(removemsg)s</a>]</div>
 <div class="iformBody">
 <fieldset class="subentity">
 %(attrform)s
 </fieldset>
 %(relattrform)s
 </div>
 <fieldset id="fs-%(parenteid)s-%(rtype)s-%(eid)s">
%(base)s
 <input type="hidden" value="%(eid)s" name="edit%(so)s-%(rtype)s:%(parenteid)s" />
 %(rinput)s
 </fieldset>
</div>''' # do not insert trailing space or \n here !

    rel_input = u'''<input id="rel-%(parenteid)s-%(rtype)s-%(eid)s" type="hidden" value="%(eid)s" name="%(rtype)s:%(parenteid)s" />'''
 
    def call(self, **kwargs):
        """redefine default View.call() method to avoid automatic
        insertions of <div class="section"> between each row of
        the resultset
        """
        self.req.add_css('cubicweb.form.css')
        rset = self.rset
        for i in xrange(len(rset)):
            self.wview(self.id, rset, row=i, **kwargs)

    def cell_call(self, row, col, ptype, peid, rtype, role='subject', **kwargs):
        """
        :param parent: the parent entity hosting the inline form
        :param rtype: the relation bridging `etype` and `parent`
        :param role: the role played by the `parent` in the relation
        """
        entity = self.entity(row, col)
        self.edit_form(entity, ptype, peid, rtype, role, **kwargs)


    def form_context(self, entity, kwargs):
        ctx = super(InlineEntityEditionForm, self).form_context(entity, kwargs)
        if self.keep_entity(entity):
            ctx['rinput'] = self.rel_input % ctx
            ctx['todelete'] = u''
        else:
            ctx['rinput'] = u''
            ctx['todelete'] = u'checked="checked"'
        ctx['count'] = entity.row + 1
        return ctx
    
    

class CopyEditionForm(EditionForm):
    id = 'copy'
    title = _('copy edition')

    def cell_call(self, row, col, **kwargs):
        self.req.add_js(('cubicweb.ajax.js', 'cubicweb.edition.js'))
        self.req.add_css('cubicweb.form.css')
        entity = self.complete_entity(row, col, skip_bytes=True)
        # make a copy of entity to avoid altering the entity in the
        # request's cache. 
        self.newentity = copy(entity)
        self.copying = self.newentity.eid
        self.newentity.eid = None
        self.edit_form(self.newentity, kwargs)
        del self.newentity

    def action_title(self, entity):
        """form's title"""
        msg = super(CopyEditionForm, self).action_title(entity)
        return msg + (u'<script type="text/javascript">updateMessage("%s");</script>\n'
                      % self.req._('Please note that this is only a shallow copy'))
        # XXX above message should have style of a warning

    @property
    def formid(self):
        return 'edition'
        
    def relations_form(self, entity, kwargs):
        return u''

    def reset_url(self, entity):
        return self.build_url('view', rql='Any X WHERE X eid %s' % self.copying)
    
    def attributes_form(self, entity, kwargs, include_eid=True):
        # we don't want __clone_eid on inlined edited entities
        if entity.eid == self.newentity.eid:
            self._hiddens.append((eid_param('__cloned_eid', entity.eid), self.copying, ''))
        return EditionForm.attributes_form(self, entity, kwargs, include_eid)
    
    def submited_message(self):
        return self.req._('element copied')
       
    

class TableEditForm(EntityForm):
    id = 'muledit'
    title = _('multiple edit')

    EDITION_BODY = u'''<form method="post" id="entityForm" onsubmit="return validateForm('entityForm', null);" action="%(action)s">
  %(error)s
  <div id="progress">%(progress)s</div>
  <fieldset>
  <input type="hidden" name="__errorurl" value="%(url)s" />
  <input type="hidden" name="__form_id" value="%(formid)s" />
  <input type="hidden" name="__redirectvid" value="%(redirectvid)s" />
  <input type="hidden" name="__redirectrql" value="%(redirectrql)s" />
  <table class="listing">
    <tr class="header">
      <th align="left"><input type="checkbox" onclick="setCheckboxesState('eid', this.checked)" value="" title="toggle check boxes" /></th>
      %(attrheaders)s
    </tr>
    %(lines)s
  </table>
  <table width="100%%">
    <tr>
      <td align="left">
        <input class="validateButton" type="submit"  value="%(okvalue)s" title="%(oktitle)s" />
        <input class="validateButton" type="reset" name="__action_cancel" value="%(cancelvalue)s" title="%(canceltitle)s" />
      </td>
    </tr>
  </table>
  </fieldset>    
</form>
'''

    WIDGET_CELL = u'''\
<td%(csscls)s>
  %(error)s
  <div>%(widget)s</div>
</td>'''
    
    def call(self, **kwargs):
        """a view to edit multiple entities of the same type
        the first column should be the eid
        """
        req = self.req
        form = req.form
        req.add_js('cubicweb.edition.js')
        req.add_css('cubicweb.form.css')
        _ = req._
        sampleentity = self.complete_entity(0)
        attrheaders = [u'<th>%s</th>' % rdef[0].display_name(req, rdef[-1])
                       for rdef in sampleentity.relations_by_category('primary', 'add')
                       if rdef[0].type != 'eid']
        ctx = {'action' : self.build_url('edit'),
               'error': self.error_message(),
               'progress': _('validating...'),
               'url': html_escape(req.url()),
               'formid': self.id,
               'redirectvid': html_escape(form.get('__redirectvid', 'list')),
               'redirectrql': html_escape(form.get('__redirectrql', self.rset.printable_rql())),
               'attrheaders': u'\n'.join(attrheaders),
               'lines': u'\n'.join(self.edit_form(ent) for ent in self.rset.entities()),
               'okvalue': _('button_ok').capitalize(),
               'oktitle': _('validate modifications on selected items').capitalize(),
               'cancelvalue': _('button_reset').capitalize(),
               'canceltitle': _('revert changes').capitalize(),
               }        
        self.w(self.EDITION_BODY % ctx)
        
        
    def reset_url(self, entity=None):
        self.build_url('view', rql=self.rset.printable_rql())
        
    def edit_form(self, entity):
        html = []
        w = html.append
        entity.complete()
        eid = entity.eid
        values = self.req.data.get('formvalues', ())
        qeid = eid_param('eid', eid)
        checked = qeid in values
        w(u'<tr class="%s">' % (entity.row % 2 and u'even' or u'odd'))
        w(u'<td>%s<input type="hidden" name="__type:%s" value="%s" /></td>'
          % (checkbox('eid', eid, checked=checked), eid, entity.e_schema))
        # attribute relations (skip eid which is handled by the checkbox
        wdg = entity.get_widget
        wdgfactories = [wdg(rschema, x) for rschema, _, x in entity.relations_by_category('primary', 'add')
                        if rschema.type != 'eid'] # XXX both (add, delete)
        seid = html_escape(dumps(eid))
        for wobj in wdgfactories:
            if isinstance(wobj, ComboBoxWidget):
                wobj.attrs['onchange'] = "setCheckboxesState2('eid', %s, 'checked')" % seid
            elif isinstance(wobj, InputWidget):
                wobj.attrs['onkeypress'] = "setCheckboxesState2('eid', %s, 'checked')" % seid
            error = wobj.render_error(entity)
            if error:
                csscls = u' class="error"'
            else:
                csscls = u''
            w(self.WIDGET_CELL % {'csscls': csscls, 'error': error,
                                  'widget': wobj.edit_render(entity)})
        w(u'</tr>')
        return '\n'.join(html)
        

class UnrelatedDivs(EntityView):
    id = 'unrelateddivs'
    __selectors__ = (match_form_params,)
    form_params = ('relation',)

    @property
    def limit(self):
        if self.req.form.get('__force_display'):
            return None
        return self.req.property_value('navigation.related-limit') + 1

    def cell_call(self, row, col):
        entity = self.entity(row, col)
        relname, target = self.req.form.get('relation').rsplit('_', 1)
        rschema = self.schema.rschema(relname)
        hidden = 'hidden' in self.req.form
        is_cell = 'is_cell' in self.req.form
        self.w(self.build_unrelated_select_div(entity, rschema, target,
                                               is_cell=is_cell, hidden=hidden))

    def build_unrelated_select_div(self, entity, rschema, target,
                                   is_cell=False, hidden=True):
        options = []
        divid = 'div%s_%s_%s' % (rschema.type, target, entity.eid)
        selectid = 'select%s_%s_%s' % (rschema.type, target, entity.eid)
        if rschema.symetric or target == 'subject':
            targettypes = rschema.objects(entity.e_schema)
            etypes = '/'.join(sorted(etype.display_name(self.req) for etype in targettypes))
        else:
            targettypes = rschema.subjects(entity.e_schema)
            etypes = '/'.join(sorted(etype.display_name(self.req) for etype in targettypes))
        etypes = cut(etypes, self.req.property_value('navigation.short-line-size'))
        options.append('<option>%s %s</option>' % (self.req._('select a'), etypes))
        options += self._get_select_options(entity, rschema, target)
        options += self._get_search_options(entity, rschema, target, targettypes)
        if 'Basket' in self.schema: # XXX
            options += self._get_basket_options(entity, rschema, target, targettypes)
        relname, target = self.req.form.get('relation').rsplit('_', 1)
        return u"""\
<div class="%s" id="%s">
  <select id="%s" onchange="javascript: addPendingInsert(this.options[this.selectedIndex], %s, %s, '%s');">
    %s
  </select>
</div>
""" % (hidden and 'hidden' or '', divid, selectid, html_escape(dumps(entity.eid)),
       is_cell and 'true' or 'null', relname, '\n'.join(options))

    def _get_select_options(self, entity, rschema, target):
        """add options to search among all entities of each possible type"""
        options = []
        eid = entity.eid
        pending_inserts = self.req.get_pending_inserts(eid)
        rtype = rschema.type
        for eview, reid in entity.vocabulary(rschema, target, self.limit):
            if reid is None:
                options.append('<option class="separator">-- %s --</option>' % html_escape(eview))
            else:
                optionid = relation_id(eid, rtype, target, reid)
                if optionid not in pending_inserts:
                    # prefix option's id with letters to make valid XHTML wise
                    options.append('<option id="id%s" value="%s">%s</option>' %
                                   (optionid, reid, html_escape(eview)))
        return options

    def _get_search_options(self, entity, rschema, target, targettypes):
        """add options to search among all entities of each possible type"""
        options = []
        _ = self.req._
        for eschema in targettypes:
            mode = '%s:%s:%s:%s' % (target, entity.eid, rschema.type, eschema)
            url = self.build_url(entity.rest_path(), vid='search-associate',
                                 __mode=mode)
            options.append((eschema.display_name(self.req),
                            '<option value="%s">%s %s</option>' % (
                html_escape(url), _('Search for'), eschema.display_name(self.req))))
        return [o for l, o in sorted(options)]

    def _get_basket_options(self, entity, rschema, target, targettypes):
        options = []
        rtype = rschema.type
        _ = self.req._
        for basketeid, basketname in self._get_basket_links(self.req.user.eid,
                                                            target, targettypes):
            optionid = relation_id(entity.eid, rtype, target, basketeid)
            options.append('<option id="%s" value="%s">%s %s</option>' % (
                optionid, basketeid, _('link to each item in'), html_escape(basketname)))
        return options

    def _get_basket_links(self, ueid, target, targettypes):
        targettypes = set(targettypes)
        for basketeid, basketname, elements in self._get_basket_info(ueid):
            baskettypes = elements.column_types(0)
            # if every elements in the basket can be attached to the
            # edited entity
            if baskettypes & targettypes:
                yield basketeid, basketname
            
    def _get_basket_info(self, ueid):
        basketref = []
        basketrql = 'Any B,N WHERE B is Basket, B owned_by U, U eid %(x)s, B name N'
        basketresultset = self.req.execute(basketrql, {'x': ueid}, 'x')
        for result in basketresultset:
            basketitemsrql = 'Any X WHERE X in_basket B, B eid %(x)s'
            rset = self.req.execute(basketitemsrql, {'x': result[0]}, 'x')
            basketref.append((result[0], result[1], rset))
        return basketref


class ComboboxView(EntityView):
    """the view used in combobox (unrelated entities)

    THIS IS A TEXT VIEW. DO NOT HTML_ESCAPE
    """
    id = 'combobox'
    accepts = ('Any',)
    title = None
    
    def cell_call(self, row, col):
        """the combo-box view for an entity: same as text out of context view
        by default
        """
        self.wview('textoutofcontext', self.rset, row=row, col=col)