web/views/workflow.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Wed, 28 Apr 2010 12:24:20 +0200
branchstable
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permissions -rw-r--r--
backport oldstable changes
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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 tempfile
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import os
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from logilab.mtconverter import xml_escape
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from logilab.common.graph import escape, GraphGenerator, DotBackend
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from cubicweb import Unauthorized, view
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from cubicweb.selectors import (implements, has_related_entities, one_line_rset,
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                                relation_possible, match_form_params,
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                                implements, score_entity)
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from cubicweb.interfaces import IWorkflowable
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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, forms, primary, autoform
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from cubicweb.web.views.tabs import TabbedPrimaryView, PrimaryTab
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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() & implements(IWorkflowable)
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                  & match_form_params('treid'))
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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.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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    def redirectpath(self, entity):
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        return entity.rest_path()
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   109
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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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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.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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class WFHistoryVComponent(component.EntityVComponent):
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    """display the workflow history for entities supporting it"""
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    __regid__ = 'wfhistory'
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    __select__ = WFHistoryView.__select__ & component.EntityVComponent.__select__
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    context = 'navcontentbottom'
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    title = _('Workflow history')
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    def cell_call(self, row, col, view=None):
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        self.wview('wfhistory', self.cw_rset, row=row, col=col, view=view)
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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'), entity.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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        hastr = False
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        for tr in entity.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 = entity.current_workflow.absolute_url()
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            yield self.build_action(self._cw._('view workflow'), wfurl)
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        if entity.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__ = implements('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__ = implements('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__ = implements('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() & implements('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__ = implements('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__ = implements('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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    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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                  if rschema.has_perm(req, 'add', toeid=e.eid))
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class TransitionEditionForm(autoform.AutomaticEntityForm):
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    __select__ = implements('Transition')
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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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        if eids:
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            return workflow_items_for_relation(self._cw, eids[0], 'state_of',
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                                               targetrelation)
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   325
        return []
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   326
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    def subject_destination_state_vocabulary(self, rtype, limit=None):
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        if not self.edited_entity.has_eid():
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            return self.workflow_states_for_relation('destination_state')
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        return self.subject_relation_vocabulary(rtype, limit)
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    def object_allowed_transition_vocabulary(self, rtype, limit=None):
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        if not self.edited_entity.has_eid():
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   334
            return self.workflow_states_for_relation('allowed_transition')
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   335
        return self.object_relation_vocabulary(rtype, limit)
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   337
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   338
class StateEditionForm(autoform.AutomaticEntityForm):
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   339
    __select__ = implements('State')
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   340
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   341
    def subject_allowed_transition_vocabulary(self, rtype, limit=None):
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   342
        if not self.edited_entity.has_eid():
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   343
            eids = self.edited_entity.linked_to('state_of', 'subject')
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   344
            if eids:
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   345
                return workflow_items_for_relation(self._cw, eids[0], 'transition_of',
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   346
                                                   'allowed_transition')
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   347
        return []
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   349
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   350
# workflow images ##############################################################
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class WorkflowDotPropsHandler(object):
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   353
    def __init__(self, req):
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   354
        self._ = req._
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   355
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   356
    def node_properties(self, stateortransition):
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   357
        """return default DOT drawing options for a state or transition"""
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   358
        props = {'label': stateortransition.printable_value('name'),
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   359
                 'fontname': 'Courier', 'fontsize':10,
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   360
                 'href': stateortransition.absolute_url(),
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   361
                 }
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   362
        if hasattr(stateortransition, 'state_of'):
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   363
            props['shape'] = 'box'
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   364
            props['style'] = 'filled'
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   365
            if stateortransition.reverse_initial_state:
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   366
                props['fillcolor'] = '#88CC88'
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   367
        else:
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   368
            props['shape'] = 'ellipse'
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   369
            descr = []
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   370
            tr = stateortransition
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   371
            if descr:
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   372
                props['label'] += escape('\n'.join(descr))
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   373
        return props
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   374
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   375
    def edge_properties(self, transition, fromstate, tostate):
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   376
        return {'label': '', 'dir': 'forward',
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   377
                'color': 'black', 'style': 'filled'}
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   378
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   379
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   380
class WorkflowVisitor:
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   381
    def __init__(self, entity):
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   382
        self.entity = entity
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   383
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   384
    def nodes(self):
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   385
        for state in self.entity.reverse_state_of:
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diff changeset
   386
            state.complete()
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   387
            yield state.eid, state
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diff changeset
   388
        for transition in self.entity.reverse_transition_of:
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diff changeset
   389
            transition.complete()
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   390
            yield transition.eid, transition
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diff changeset
   391
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   392
    def edges(self):
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diff changeset
   393
        for transition in self.entity.reverse_transition_of:
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diff changeset
   394
            for incomingstate in transition.reverse_allowed_transition:
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diff changeset
   395
                yield incomingstate.eid, transition.eid, transition
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diff changeset
   396
            for outgoingstate in transition.potential_destinations():
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diff changeset
   397
                yield transition.eid, outgoingstate.eid, transition
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   398
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diff changeset
   399
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   400
class WorkflowGraphView(view.EntityView):
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diff changeset
   401
    __regid__ = 'wfgraph'
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diff changeset
   402
    __select__ = EntityView.__select__ & one_line_rset() & implements('Workflow')
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diff changeset
   403
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parents: 5174
diff changeset
   404
    def cell_call(self, row, col):
34e669b6fd95 [mq]: worklfow view
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parents: 5174
diff changeset
   405
        entity = self.cw_rset.get_entity(row, col)
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parents: 5174
diff changeset
   406
        visitor = WorkflowVisitor(entity)
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parents: 5174
diff changeset
   407
        prophdlr = WorkflowDotPropsHandler(self._cw)
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parents: 5174
diff changeset
   408
        wfname = 'workflow%s' % str(entity.eid)
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parents: 5174
diff changeset
   409
        generator = GraphGenerator(DotBackend(wfname, None,
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diff changeset
   410
                                              ratio='compress', size='30,10'))
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diff changeset
   411
        # map file
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diff changeset
   412
        pmap, mapfile = tempfile.mkstemp(".map", wfname)
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parents: 5174
diff changeset
   413
        os.close(pmap)
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diff changeset
   414
        # image file
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diff changeset
   415
        fd, tmpfile = tempfile.mkstemp('.png')
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parents: 5174
diff changeset
   416
        os.close(fd)
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parents: 5174
diff changeset
   417
        generator.generate(visitor, prophdlr, tmpfile, mapfile)
34e669b6fd95 [mq]: worklfow view
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parents: 5174
diff changeset
   418
        self.w(u'<img src="%s" alt="%s" usemap="#%s" />' % (
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diff changeset
   419
            xml_escape(entity.absolute_url(vid='wfimage', tmpfile=tmpfile)),
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diff changeset
   420
            xml_escape(self._cw._('graphical workflow for %s') % entity.name),
34e669b6fd95 [mq]: worklfow view
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diff changeset
   421
            wfname))
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parents: 5174
diff changeset
   422
        stream = open(mapfile, 'r').read()
34e669b6fd95 [mq]: worklfow view
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parents: 5174
diff changeset
   423
        stream = stream.decode(self._cw.encoding)
34e669b6fd95 [mq]: worklfow view
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parents: 5174
diff changeset
   424
        self.w(stream)
34e669b6fd95 [mq]: worklfow view
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parents: 5174
diff changeset
   425
        os.unlink(mapfile)
34e669b6fd95 [mq]: worklfow view
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5174
diff changeset
   426
3215
bf30ab5ba6ee fix workflow graph views and tabs for the new wf system, remove useless view and action (actually useless since introduction of tabbed entity type view
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2920
diff changeset
   427
class WorkflowImageView(TmpFileViewMixin, view.EntityView):
5224
34e669b6fd95 [mq]: worklfow view
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parents: 5174
diff changeset
   428
    __regid__ = 'wfimage'
3377
dd9d292b6a6d use __regid__ instead of id on appobject classes
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parents: 3369
diff changeset
   429
    __select__ = implements('Workflow')
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diff changeset
   430
    content_type = 'image/png'
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diff changeset
   431
5224
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diff changeset
   432
    def cell_call(self, row=0, col=0):
34e669b6fd95 [mq]: worklfow view
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parents: 5174
diff changeset
   433
        tmpfile = self._cw.form.get('tmpfile', None)
34e669b6fd95 [mq]: worklfow view
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5174
diff changeset
   434
        self.w(open(tmpfile, 'rb').read())
34e669b6fd95 [mq]: worklfow view
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parents: 5174
diff changeset
   435
        os.unlink(tmpfile)