web/views/workflow.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Wed, 29 Sep 2010 16:16:32 +0200
changeset 6366 1806148d6ce8
parent 6141 b8287e54b528
parent 6354 73bf870d37d5
child 6456 150246e77cda
permissions -rw-r--r--
backport stable
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# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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"""workflow views:
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* IWorkflowable views and forms
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* workflow entities views (State, Transition, TrInfo)
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"""
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__docformat__ = "restructuredtext en"
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_ = unicode
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import os
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from warnings import warn
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from logilab.mtconverter import xml_escape
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from logilab.common.graph import escape
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from cubicweb import Unauthorized, view
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from cubicweb.selectors import (has_related_entities, one_line_rset,
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                                relation_possible, match_form_params,
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                                score_entity, is_instance, adaptable)
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from cubicweb.view import EntityView
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from cubicweb.schema import display_name
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from cubicweb.web import uicfg, stdmsgs, action, component, form, action
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from cubicweb.web import formfields as ff, formwidgets as fwdgs
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from cubicweb.web.views import TmpFileViewMixin
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from cubicweb.web.views import forms, primary, autoform, ibreadcrumbs
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from cubicweb.web.views.tabs import TabbedPrimaryView, PrimaryTab
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from cubicweb.web.views.dotgraphview import DotGraphView, DotPropsHandler
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_pvs = uicfg.primaryview_section
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_pvs.tag_subject_of(('Workflow', 'initial_state', '*'), 'hidden')
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_pvs.tag_object_of(('*', 'state_of', 'Workflow'), 'hidden')
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_pvs.tag_object_of(('*', 'transition_of', 'Workflow'), 'hidden')
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_pvs.tag_object_of(('*', 'wf_info_for', '*'), 'hidden')
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for rtype in ('in_state', 'by_transition', 'from_state', 'to_state'):
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    _pvs.tag_subject_of(('*', rtype, '*'), 'hidden')
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    _pvs.tag_object_of(('*', rtype, '*'), 'hidden')
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_pvs.tag_object_of(('*', 'wf_info_for', '*'), 'hidden')
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_abaa = uicfg.actionbox_appearsin_addmenu
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_abaa.tag_subject_of(('BaseTransition', 'condition', 'RQLExpression'), False)
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_abaa.tag_subject_of(('State', 'allowed_transition', 'BaseTransition'), False)
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_abaa.tag_object_of(('SubWorkflowExitPoint', 'destination_state', 'State'),
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                    False)
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_abaa.tag_subject_of(('*', 'wf_info_for', '*'), False)
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_abaa.tag_object_of(('*', 'wf_info_for', '*'), False)
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_abaa.tag_object_of(('*', 'state_of', 'CWEType'), True)
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_abaa.tag_object_of(('*', 'transition_of', 'CWEType'), True)
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_abaa.tag_subject_of(('Transition', 'destination_state', '*'), True)
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_abaa.tag_object_of(('*', 'allowed_transition', 'Transition'), True)
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_abaa.tag_object_of(('*', 'destination_state', 'State'), True)
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_abaa.tag_subject_of(('State', 'allowed_transition', '*'), True)
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_abaa.tag_object_of(('State', 'state_of', 'Workflow'), True)
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_abaa.tag_object_of(('Transition', 'transition_of', 'Workflow'), True)
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_abaa.tag_object_of(('WorkflowTransition', 'transition_of', 'Workflow'), True)
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_afs = uicfg.autoform_section
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_afs.tag_subject_of(('TrInfo', 'to_state', '*'), 'main', 'hidden')
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_afs.tag_subject_of(('TrInfo', 'from_state', '*'), 'main', 'hidden')
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_afs.tag_object_of(('State', 'allowed_transition', '*'), 'main', 'attributes')
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# IWorkflowable views #########################################################
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class ChangeStateForm(forms.CompositeEntityForm):
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    __regid__ = 'changestate'
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    form_renderer_id = 'base' # don't want EntityFormRenderer
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    form_buttons = [fwdgs.SubmitButton(),
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                    fwdgs.Button(stdmsgs.BUTTON_CANCEL, cwaction='cancel')]
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class ChangeStateFormView(form.FormViewMixIn, view.EntityView):
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    __regid__ = 'statuschange'
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    title = _('status change')
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    __select__ = (one_line_rset()
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                  & match_form_params('treid')
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                  & adaptable('IWorkflowable'))
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    def cell_call(self, row, col):
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        entity = self.cw_rset.get_entity(row, col)
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        transition = self._cw.entity_from_eid(self._cw.form['treid'])
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        form = self.get_form(entity, transition)
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        self.w(u'<h4>%s %s</h4>\n' % (self._cw._(transition.name),
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                                      entity.view('oneline')))
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        msg = self._cw._('status will change from %(st1)s to %(st2)s') % {
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            'st1': entity.cw_adapt_to('IWorkflowable').printable_state,
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            'st2': self._cw._(transition.destination(entity).name)}
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        self.w(u'<p>%s</p>\n' % msg)
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        self.w(form.render())
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   108
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    def redirectpath(self, entity):
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        return entity.rest_path()
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   111
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    def get_form(self, entity, transition, **kwargs):
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        # XXX used to specify both rset/row/col and entity in case implements
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        # selector (and not implements) is used on custom form
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        form = self._cw.vreg['forms'].select(
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            'changestate', self._cw, entity=entity, transition=transition,
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            redirect_path=self.redirectpath(entity), **kwargs)
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        trinfo = self._cw.vreg['etypes'].etype_class('TrInfo')(self._cw)
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        trinfo.eid = self._cw.varmaker.next()
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        subform = self._cw.vreg['forms'].select('edition', self._cw, entity=trinfo,
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                                                mainform=False)
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        subform.field_by_name('wf_info_for', 'subject').value = entity.eid
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        trfield = subform.field_by_name('by_transition', 'subject')
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        trfield.widget = fwdgs.HiddenInput()
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        trfield.value = transition.eid
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        form.add_subform(subform)
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        return form
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   129
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class WFHistoryView(EntityView):
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    __regid__ = 'wfhistory'
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    __select__ = relation_possible('wf_info_for', role='object') & \
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                 score_entity(lambda x: x.cw_adapt_to('IWorkflowable').workflow_history)
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    title = _('Workflow history')
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    def cell_call(self, row, col, view=None):
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        _ = self._cw._
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        eid = self.cw_rset[row][col]
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        sel = 'Any FS,TS,WF,D'
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        rql = ' ORDERBY D DESC WHERE WF wf_info_for X,'\
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              'WF from_state FS, WF to_state TS, WF comment C,'\
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              'WF creation_date D'
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        if self._cw.vreg.schema.eschema('CWUser').has_perm(self._cw, 'read'):
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            sel += ',U,C'
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            rql += ', WF owned_by U?'
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            displaycols = range(5)
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            headers = (_('from_state'), _('to_state'), _('comment'), _('date'),
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                       _('CWUser'))
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        else:
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            sel += ',C'
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            displaycols = range(4)
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            headers = (_('from_state'), _('to_state'), _('comment'), _('date'))
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        rql = '%s %s, X eid %%(x)s' % (sel, rql)
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        try:
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            rset = self._cw.execute(rql, {'x': eid})
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        except Unauthorized:
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            return
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        if rset:
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            self.wview('table', rset, title=_(self.title), displayactions=False,
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                       displaycols=displaycols, headers=headers)
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   163
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class WFHistoryVComponent(component.CtxComponent):
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    """display the workflow history for entities supporting it"""
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    __regid__ = 'wfhistory'
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    __select__ = component.EntityVComponent.__select__ & WFHistoryView.__select__
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    context = 'navcontentbottom'
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    title = _('Workflow history')
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    def render_body(self, w):
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        if hasattr(self, 'cell_call'):
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            warn('[3.10] %s should now implement render_body instead of cell_call',
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                 DeprecationWarning, self.__class__)
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            self.w = w
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            self.cell_call(self.entity.cw_row, self.entity.cw_col)
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        else:
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            self.entity.view('wfhistory', w=w)
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# workflow actions #############################################################
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class WorkflowActions(action.Action):
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    """fill 'workflow' sub-menu of the actions box"""
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    __regid__ = 'workflow'
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    __select__ = (action.Action.__select__ & one_line_rset() &
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                  relation_possible('in_state'))
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    submenu = _('workflow')
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    order = 10
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    def fill_menu(self, box, menu):
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        entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)
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        menu.label = u'%s: %s' % (self._cw._('state'),
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                                  entity.cw_adapt_to('IWorkflowable').printable_state)
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        menu.append_anyway = True
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        super(WorkflowActions, self).fill_menu(box, menu)
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    def actual_actions(self):
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        entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)
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        iworkflowable = entity.cw_adapt_to('IWorkflowable')
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        hastr = False
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        for tr in iworkflowable.possible_transitions():
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            url = entity.absolute_url(vid='statuschange', treid=tr.eid)
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            yield self.build_action(self._cw._(tr.name), url)
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            hastr = True
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        # don't propose to see wf if user can't pass any transition
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        if hastr:
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            wfurl = iworkflowable.current_workflow.absolute_url()
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            yield self.build_action(self._cw._('view workflow'), wfurl)
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        if iworkflowable.workflow_history:
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            wfurl = entity.absolute_url(vid='wfhistory')
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            yield self.build_action(self._cw._('view history'), wfurl)
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# workflow entity types views ##################################################
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_pvs = uicfg.primaryview_section
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_pvs.tag_subject_of(('Workflow', 'initial_state', '*'), 'hidden')
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_pvs.tag_object_of(('*', 'state_of', 'Workflow'), 'hidden')
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_pvs.tag_object_of(('*', 'transition_of', 'Workflow'), 'hidden')
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_pvs.tag_object_of(('*', 'default_workflow', 'Workflow'), 'hidden')
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_abaa = uicfg.actionbox_appearsin_addmenu
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_abaa.tag_subject_of(('BaseTransition', 'condition', 'RQLExpression'), False)
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_abaa.tag_subject_of(('State', 'allowed_transition', 'BaseTransition'), False)
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_abaa.tag_object_of(('SubWorkflowExitPoint', 'destination_state', 'State'),
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                    False)
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_abaa.tag_object_of(('State', 'state_of', 'Workflow'), True)
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_abaa.tag_object_of(('BaseTransition', 'transition_of', 'Workflow'), False)
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_abaa.tag_object_of(('Transition', 'transition_of', 'Workflow'), True)
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_abaa.tag_object_of(('WorkflowTransition', 'transition_of', 'Workflow'), True)
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class WorkflowPrimaryView(TabbedPrimaryView):
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    __select__ = is_instance('Workflow')
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    tabs = [  _('wf_tab_info'), _('wfgraph'),]
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    default_tab = 'wf_tab_info'
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class CellView(view.EntityView):
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    __regid__ = 'cell'
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    __select__ = is_instance('TrInfo')
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    def cell_call(self, row, col, cellvid=None):
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        self.w(self.cw_rset.get_entity(row, col).view('reledit', rtype='comment'))
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class StateInContextView(view.EntityView):
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    """convenience trick, State's incontext view should not be clickable"""
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    __regid__ = 'incontext'
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    __select__ = is_instance('State')
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    def cell_call(self, row, col):
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        self.w(xml_escape(self._cw.view('textincontext', self.cw_rset,
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                                        row=row, col=col)))
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class WorkflowTabTextView(PrimaryTab):
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    __regid__ = 'wf_tab_info'
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    __select__ = PrimaryTab.__select__ & one_line_rset() & is_instance('Workflow')
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    def render_entity_attributes(self, entity):
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        _ = self._cw._
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        self.w(u'<div>%s</div>' % (entity.printable_value('description')))
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        self.w(u'<span>%s%s</span>' % (_("workflow_of").capitalize(), _(" :")))
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        html = []
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        for e in  entity.workflow_of:
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            view = e.view('outofcontext')
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            if entity.eid == e.default_workflow[0].eid:
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                view += u' <span>[%s]</span>' % _('default_workflow')
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            html.append(view)
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        self.w(', '.join(v for v in html))
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        self.w(u'<h2>%s</h2>' % _("Transition_plural"))
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        rset = self._cw.execute(
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            'Any T,T,DS,T,TT ORDERBY TN WHERE T transition_of WF, WF eid %(x)s,'
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            'T type TT, T name TN, T destination_state DS?', {'x': entity.eid})
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        self.wview('editable-table', rset, 'null',
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                   cellvids={ 1: 'trfromstates', 2: 'outofcontext', 3:'trsecurity',},
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                   headers = (_('Transition'),  _('from_state'),
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                              _('to_state'), _('permissions'), _('type') ),
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                   )
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class TransitionSecurityTextView(view.EntityView):
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    __regid__ = 'trsecurity'
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    __select__ = is_instance('Transition')
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    def cell_call(self, row, col):
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        _ = self._cw._
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        entity = self.cw_rset.get_entity(self.cw_row, self.cw_col)
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        if entity.require_group:
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            self.w(u'<div>%s%s %s</div>' %
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                   (_('groups'), _(" :"),
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                    u', '.join((g.view('incontext') for g
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                               in entity.require_group))))
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        if entity.condition:
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            self.w(u'<div>%s%s %s</div>' %
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                   ( _('conditions'), _(" :"),
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                     u'<br/>'.join((e.dc_title() for e
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                                in entity.condition))))
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class TransitionAllowedTextView(view.EntityView):
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    __regid__ = 'trfromstates'
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    __select__ = is_instance('Transition')
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    def cell_call(self, row, col):
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        entity = self.cw_rset.get_entity(self.cw_row, self.cw_col)
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        self.w(u', '.join((e.view('outofcontext') for e
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                           in entity.reverse_allowed_transition)))
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# workflow entity types edition ################################################
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_afs = uicfg.autoform_section
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_afs.tag_subject_of(('TrInfo', 'to_state', '*'), 'main', 'hidden')
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_afs.tag_subject_of(('TrInfo', 'from_state', '*'), 'main', 'hidden')
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_afs.tag_object_of(('State', 'allowed_transition', '*'), 'main', 'attributes')
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_afs.tag_subject_of(('State', 'allowed_transition', '*'), 'main', 'attributes')
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def workflow_items_for_relation(req, wfeid, wfrelation, targetrelation):
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    wf = req.entity_from_eid(wfeid)
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   321
    rschema = req.vreg.schema[targetrelation]
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    return sorted((e.view('combobox'), e.eid)
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                  for e in getattr(wf, 'reverse_%s' % wfrelation)
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   324
                  if rschema.has_perm(req, 'add', toeid=e.eid))
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   325
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   326
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class TransitionEditionForm(autoform.AutomaticEntityForm):
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    __select__ = is_instance('Transition')
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   329
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    def workflow_states_for_relation(self, targetrelation):
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        eids = self.edited_entity.linked_to('transition_of', 'subject')
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   332
        if eids:
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   333
            return workflow_items_for_relation(self._cw, eids[0], 'state_of',
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   334
                                               targetrelation)
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   335
        return []
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   336
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   337
    def subject_destination_state_vocabulary(self, rtype, limit=None):
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   338
        if not self.edited_entity.has_eid():
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   339
            return self.workflow_states_for_relation('destination_state')
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   340
        return self.subject_relation_vocabulary(rtype, limit)
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   341
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   342
    def object_allowed_transition_vocabulary(self, rtype, limit=None):
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   343
        if not self.edited_entity.has_eid():
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   344
            return self.workflow_states_for_relation('allowed_transition')
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   345
        return self.object_relation_vocabulary(rtype, limit)
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   346
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   347
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class StateEditionForm(autoform.AutomaticEntityForm):
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    __select__ = is_instance('State')
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   350
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   351
    def subject_allowed_transition_vocabulary(self, rtype, limit=None):
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        if not self.edited_entity.has_eid():
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   353
            eids = self.edited_entity.linked_to('state_of', 'subject')
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   354
            if eids:
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   355
                return workflow_items_for_relation(self._cw, eids[0], 'transition_of',
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   356
                                                   'allowed_transition')
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   357
        return []
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class WorkflowIBreadCrumbsAdapter(ibreadcrumbs.IBreadCrumbsAdapter):
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    __select__ = is_instance('Workflow')
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    # XXX what if workflow of multiple types?
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   362
    def parent_entity(self):
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   363
        return self.entity.workflow_of and self.entity.workflow_of[0] or None
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   364
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   365
class WorkflowItemIBreadCrumbsAdapter(ibreadcrumbs.IBreadCrumbsAdapter):
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   366
    __select__ = is_instance('BaseTransition', 'State')
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   367
    def parent_entity(self):
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   368
        return self.entity.workflow
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   369
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   370
class TransitionItemIBreadCrumbsAdapter(ibreadcrumbs.IBreadCrumbsAdapter):
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   371
    __select__ = is_instance('SubWorkflowExitPoint')
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   372
    def parent_entity(self):
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   373
        return self.entity.reverse_subworkflow_exit[0]
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   374
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   375
class TrInfoIBreadCrumbsAdapter(ibreadcrumbs.IBreadCrumbsAdapter):
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   376
    __select__ = is_instance('TrInfo')
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   377
    def parent_entity(self):
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   378
        return self.entity.for_entity
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   379
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   380
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   381
# workflow images ##############################################################
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   382
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   383
class WorkflowDotPropsHandler(DotPropsHandler):
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   384
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   385
    def node_properties(self, stateortransition):
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   386
        """return default DOT drawing options for a state or transition"""
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diff changeset
   387
        props = super(WorkflowDotPropsHandler, self).node_properties(stateortransition)
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   388
        if hasattr(stateortransition, 'state_of'):
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diff changeset
   389
            props['shape'] = 'box'
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   390
            props['style'] = 'filled'
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diff changeset
   391
            if stateortransition.reverse_initial_state:
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diff changeset
   392
                props['fillcolor'] = '#88CC88'
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diff changeset
   393
        else:
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diff changeset
   394
            props['shape'] = 'ellipse'
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diff changeset
   395
            descr = []
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diff changeset
   396
            tr = stateortransition
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diff changeset
   397
            if descr:
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diff changeset
   398
                props['label'] += escape('\n'.join(descr))
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diff changeset
   399
        return props
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   400
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diff changeset
   401
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diff changeset
   402
class WorkflowVisitor(object):
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   403
    def __init__(self, entity):
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diff changeset
   404
        self.entity = entity
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   405
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   406
    def nodes(self):
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diff changeset
   407
        for state in self.entity.reverse_state_of:
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diff changeset
   408
            state.complete()
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diff changeset
   409
            yield state.eid, state
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diff changeset
   410
        for transition in self.entity.reverse_transition_of:
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diff changeset
   411
            transition.complete()
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diff changeset
   412
            yield transition.eid, transition
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diff changeset
   413
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diff changeset
   414
    def edges(self):
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diff changeset
   415
        for transition in self.entity.reverse_transition_of:
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diff changeset
   416
            for incomingstate in transition.reverse_allowed_transition:
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diff changeset
   417
                yield incomingstate.eid, transition.eid, transition
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322c3dd96dd5 [workflow] finish refactoring introduced by 021035b9a7ab for 'go back' transition:
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diff changeset
   418
            for outgoingstate in transition.potential_destinations():
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diff changeset
   419
                yield transition.eid, outgoingstate.eid, transition
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diff changeset
   420
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diff changeset
   421
class WorkflowGraphView(DotGraphView):
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diff changeset
   422
    __regid__ = 'wfgraph'
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diff changeset
   423
    __select__ = EntityView.__select__ & one_line_rset() & is_instance('Workflow')
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diff changeset
   424
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diff changeset
   425
    def build_visitor(self, entity):
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diff changeset
   426
        return WorkflowVisitor(entity)
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diff changeset
   427
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diff changeset
   428
    def build_dotpropshandler(self):
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Aurelien Campeas <aurelien.campeas@logilab.fr>
parents: 6093
diff changeset
   429
        return WorkflowDotPropsHandler(self._cw)
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parents: 5174
diff changeset
   430
5682
5628247f51ce [security] view was giving web access to every fs file accessible by the web server process. Fix this security hole by storing file in session data, not direct form parameters
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parents: 5426
diff changeset
   431
5628247f51ce [security] view was giving web access to every fs file accessible by the web server process. Fix this security hole by storing file in session data, not direct form parameters
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
   432
class TmpPngView(TmpFileViewMixin, view.EntityView):
5628247f51ce [security] view was giving web access to every fs file accessible by the web server process. Fix this security hole by storing file in session data, not direct form parameters
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
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    __regid__ = 'tmppng'
5628247f51ce [security] view was giving web access to every fs file accessible by the web server process. Fix this security hole by storing file in session data, not direct form parameters
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
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   434
    __select__ = match_form_params('tmpfile')
1091
b5e253c0dd13 a bit of reorganisation inside web/views:
sylvain.thenault@logilab.fr
parents: 984
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   435
    content_type = 'image/png'
5682
5628247f51ce [security] view was giving web access to every fs file accessible by the web server process. Fix this security hole by storing file in session data, not direct form parameters
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
diff changeset
   436
    binary = True
1504
c6051f141807 register to catalog, delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1398
diff changeset
   437
5224
34e669b6fd95 [mq]: worklfow view
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5174
diff changeset
   438
    def cell_call(self, row=0, col=0):
5682
5628247f51ce [security] view was giving web access to every fs file accessible by the web server process. Fix this security hole by storing file in session data, not direct form parameters
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5426
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   439
        tmpfile = self._cw.session.data[self._cw.form['tmpfile']]
5224
34e669b6fd95 [mq]: worklfow view
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5174
diff changeset
   440
        self.w(open(tmpfile, 'rb').read())
5684
015755f67e46 [workflow image] remove debug code
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5682
diff changeset
   441
        os.unlink(tmpfile)