web/views/workflow.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Wed, 13 Oct 2010 15:59:05 +0200
changeset 6473 2b09a410ff8e
parent 6456 150246e77cda
child 6690 7d68948015ba
permissions -rw-r--r--
[wf history] avoid title duplication
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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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   136
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    def cell_call(self, row, col, view=None, title=title):
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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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            if title:
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                title = _(title)
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            self.wview('table', rset, title=title, displayactions=False,
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                       displaycols=displaycols, headers=headers)
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   165
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class WFHistoryVComponent(component.EntityCtxComponent):
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    """display the workflow history for entities supporting it"""
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    __regid__ = 'wfhistory'
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    __select__ = component.EntityCtxComponent.__select__ & WFHistoryView.__select__
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    context = 'navcontentbottom'
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    title = _('Workflow history')
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   172
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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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                 % self.__class__, DeprecationWarning)
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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, title=None)
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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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   323
    rschema = req.vreg.schema[targetrelation]
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   324
    return sorted((e.view('combobox'), e.eid)
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                  for e in getattr(wf, 'reverse_%s' % wfrelation)
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   326
                  if rschema.has_perm(req, 'add', toeid=e.eid))
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   327
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   328
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class TransitionEditionForm(autoform.AutomaticEntityForm):
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    __select__ = is_instance('Transition')
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   331
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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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   334
        if eids:
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   335
            return workflow_items_for_relation(self._cw, eids[0], 'state_of',
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   336
                                               targetrelation)
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   337
        return []
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   338
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   339
    def subject_destination_state_vocabulary(self, rtype, limit=None):
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   340
        if not self.edited_entity.has_eid():
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   341
            return self.workflow_states_for_relation('destination_state')
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   342
        return self.subject_relation_vocabulary(rtype, limit)
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   343
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   344
    def object_allowed_transition_vocabulary(self, rtype, limit=None):
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   345
        if not self.edited_entity.has_eid():
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   346
            return self.workflow_states_for_relation('allowed_transition')
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   347
        return self.object_relation_vocabulary(rtype, limit)
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   348
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   349
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class StateEditionForm(autoform.AutomaticEntityForm):
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    __select__ = is_instance('State')
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   352
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   353
    def subject_allowed_transition_vocabulary(self, rtype, limit=None):
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   354
        if not self.edited_entity.has_eid():
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   355
            eids = self.edited_entity.linked_to('state_of', 'subject')
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   356
            if eids:
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   357
                return workflow_items_for_relation(self._cw, eids[0], 'transition_of',
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   358
                                                   'allowed_transition')
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   359
        return []
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class WorkflowIBreadCrumbsAdapter(ibreadcrumbs.IBreadCrumbsAdapter):
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   362
    __select__ = is_instance('Workflow')
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   363
    # XXX what if workflow of multiple types?
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   364
    def parent_entity(self):
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   365
        return self.entity.workflow_of and self.entity.workflow_of[0] or None
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   366
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   367
class WorkflowItemIBreadCrumbsAdapter(ibreadcrumbs.IBreadCrumbsAdapter):
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   368
    __select__ = is_instance('BaseTransition', 'State')
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   369
    def parent_entity(self):
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   370
        return self.entity.workflow
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   371
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   372
class TransitionItemIBreadCrumbsAdapter(ibreadcrumbs.IBreadCrumbsAdapter):
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   373
    __select__ = is_instance('SubWorkflowExitPoint')
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   374
    def parent_entity(self):
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   375
        return self.entity.reverse_subworkflow_exit[0]
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   376
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   377
class TrInfoIBreadCrumbsAdapter(ibreadcrumbs.IBreadCrumbsAdapter):
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   378
    __select__ = is_instance('TrInfo')
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   379
    def parent_entity(self):
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diff changeset
   380
        return self.entity.for_entity
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   381
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   382
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diff changeset
   383
# workflow images ##############################################################
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   384
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   385
class WorkflowDotPropsHandler(DotPropsHandler):
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   386
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   387
    def node_properties(self, stateortransition):
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   388
        """return default DOT drawing options for a state or transition"""
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diff changeset
   389
        props = super(WorkflowDotPropsHandler, self).node_properties(stateortransition)
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   390
        if hasattr(stateortransition, 'state_of'):
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diff changeset
   391
            props['shape'] = 'box'
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   392
            props['style'] = 'filled'
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diff changeset
   393
            if stateortransition.reverse_initial_state:
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diff changeset
   394
                props['fillcolor'] = '#88CC88'
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diff changeset
   395
        else:
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   396
            props['shape'] = 'ellipse'
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diff changeset
   397
            descr = []
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diff changeset
   398
            tr = stateortransition
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diff changeset
   399
            if descr:
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diff changeset
   400
                props['label'] += escape('\n'.join(descr))
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diff changeset
   401
        return props
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diff changeset
   402
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diff changeset
   403
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Aurelien Campeas <aurelien.campeas@logilab.fr>
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diff changeset
   404
class WorkflowVisitor(object):
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diff changeset
   405
    def __init__(self, entity):
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diff changeset
   406
        self.entity = entity
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   407
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diff changeset
   408
    def nodes(self):
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diff changeset
   409
        for state in self.entity.reverse_state_of:
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diff changeset
   410
            state.complete()
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diff changeset
   411
            yield state.eid, state
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diff changeset
   412
        for transition in self.entity.reverse_transition_of:
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diff changeset
   413
            transition.complete()
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diff changeset
   414
            yield transition.eid, transition
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diff changeset
   415
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diff changeset
   416
    def edges(self):
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diff changeset
   417
        for transition in self.entity.reverse_transition_of:
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diff changeset
   418
            for incomingstate in transition.reverse_allowed_transition:
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diff changeset
   419
                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
   420
            for outgoingstate in transition.potential_destinations():
322c3dd96dd5 [workflow] finish refactoring introduced by 021035b9a7ab for 'go back' transition:
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diff changeset
   421
                yield transition.eid, outgoingstate.eid, transition
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diff changeset
   422
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diff changeset
   423
class WorkflowGraphView(DotGraphView):
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diff changeset
   424
    __regid__ = 'wfgraph'
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diff changeset
   425
    __select__ = EntityView.__select__ & one_line_rset() & is_instance('Workflow')
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diff changeset
   426
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diff changeset
   427
    def build_visitor(self, entity):
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diff changeset
   428
        return WorkflowVisitor(entity)
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diff changeset
   429
9001a74fcc82 more generic dot graph generator
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diff changeset
   430
    def build_dotpropshandler(self):
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Aurelien Campeas <aurelien.campeas@logilab.fr>
parents: 6093
diff changeset
   431
        return WorkflowDotPropsHandler(self._cw)
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parents: 5174
diff changeset
   432
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
   433
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
   434
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
diff changeset
   435
    __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
diff changeset
   436
    __select__ = match_form_params('tmpfile')
1091
b5e253c0dd13 a bit of reorganisation inside web/views:
sylvain.thenault@logilab.fr
parents: 984
diff changeset
   437
    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
   438
    binary = True
1504
c6051f141807 register to catalog, delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1398
diff changeset
   439
5224
34e669b6fd95 [mq]: worklfow view
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5174
diff changeset
   440
    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
diff changeset
   441
        tmpfile = self._cw.session.data[self._cw.form['tmpfile']]
5224
34e669b6fd95 [mq]: worklfow view
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5174
diff changeset
   442
        self.w(open(tmpfile, 'rb').read())
5684
015755f67e46 [workflow image] remove debug code
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5682
diff changeset
   443
        os.unlink(tmpfile)