web/views/workflow.py
author Aurelien Campeas <aurelien.campeas@logilab.fr>
Wed, 09 May 2012 17:15:44 +0200
changeset 8394 b8b23af60019
parent 8216 99ff746e8de8
child 8482 0044a29ea118
permissions -rw-r--r--
[server/hook] a tiny bit of doc about before_server_shutdown
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# copyright 2003-2011 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
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from cubicweb.predicates 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, 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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_affk = uicfg.autoform_field_kwargs
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# IWorkflowable views #########################################################
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class ChangeStateForm(forms.CompositeEntityForm):
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    # set dom id to ensure there is no conflict with edition form (see
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    # session_key() implementation)
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    __regid__ = domid = '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, 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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        form.render(w=self.w)
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   107
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    def redirectpath(self, entity):
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        return entity.rest_path()
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   110
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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 is_instance) 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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   128
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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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   135
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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,C,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,WF'
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            rql += ', WF owned_by U?'
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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 += ',WF'
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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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   158
                self.w(u'<h2>%s</h2>\n' % _(title))
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            self.wview('table', rset, headers=headers,
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                       cellvids={2: 'editable-final'})
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   162
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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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   169
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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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            # pylint: disable=E1101
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   176
            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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class InContextWithStateView(EntityView):
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    """display incontext view for an entity as well as its current state"""
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    __regid__ = 'incontext-state'
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    __select__ = adaptable('IWorkflowable')
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    def entity_call(self, entity):
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        iwf = entity.cw_adapt_to('IWorkflowable')
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        self.w(u'%s [%s]' % (entity.view('incontext'), iwf.printable_state))
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   189
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# workflow actions #############################################################
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   191
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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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   197
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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 StateInContextView(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('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(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(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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def _wf_items_for_relation(req, wfeid, wfrelation, field):
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    wf = req.entity_from_eid(wfeid)
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    rschema = req.vreg.schema[field.name]
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    param = 'toeid' if field.role == 'subject' else 'fromeid'
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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', **{param: e.eid}))
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# TrInfo
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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_attribute(('TrInfo', 'tr_count'), 'main', 'hidden')
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# BaseTransition
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# XXX * allowed_transition BaseTransition
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# XXX BaseTransition destination_state *
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def transition_states_vocabulary(form, field):
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    entity = form.edited_entity
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    if not entity.has_eid():
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        eids = form.linked_to.get(('transition_of', 'subject'))
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        if not eids:
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            return []
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        return _wf_items_for_relation(form._cw, eids[0], 'state_of', field)
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    return field.relvoc_unrelated(form)
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_afs.tag_subject_of(('*', 'destination_state', '*'), 'main', 'attributes')
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_affk.tag_subject_of(('*', 'destination_state', '*'),
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                     {'choices': transition_states_vocabulary})
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_afs.tag_object_of(('*', 'allowed_transition', '*'), 'main', 'attributes')
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_affk.tag_object_of(('*', 'allowed_transition', '*'),
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                     {'choices': transition_states_vocabulary})
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# State
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def state_transitions_vocabulary(form, field):
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    entity = form.edited_entity
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    if not entity.has_eid():
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        eids = form.linked_to.get(('state_of', 'subject'))
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        if eids:
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            return _wf_items_for_relation(form._cw, eids[0], 'transition_of', field)
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        return []
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    return field.relvoc_unrelated(form)
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_afs.tag_subject_of(('State', 'allowed_transition', '*'), 'main', 'attributes')
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_affk.tag_subject_of(('State', 'allowed_transition', '*'),
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                     {'choices': state_transitions_vocabulary})
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   362
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# adaptaters ###################################################################
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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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    def parent_entity(self):
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   369
        return self.entity.workflow_of and self.entity.workflow_of[0] or None
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class WorkflowItemIBreadCrumbsAdapter(ibreadcrumbs.IBreadCrumbsAdapter):
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   372
    __select__ = is_instance('BaseTransition', 'State')
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   373
    def parent_entity(self):
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   374
        return self.entity.workflow
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class TransitionItemIBreadCrumbsAdapter(ibreadcrumbs.IBreadCrumbsAdapter):
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   377
    __select__ = is_instance('SubWorkflowExitPoint')
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   378
    def parent_entity(self):
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   379
        return self.entity.reverse_subworkflow_exit[0]
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   380
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   381
class TrInfoIBreadCrumbsAdapter(ibreadcrumbs.IBreadCrumbsAdapter):
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   382
    __select__ = is_instance('TrInfo')
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   383
    def parent_entity(self):
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   384
        return self.entity.for_entity
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   385
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diff changeset
   386
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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
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diff changeset
   387
# workflow images ##############################################################
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   388
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   389
class WorkflowDotPropsHandler(DotPropsHandler):
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   390
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   391
    def node_properties(self, stateortransition):
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diff changeset
   392
        """return default DOT drawing options for a state or transition"""
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diff changeset
   393
        props = super(WorkflowDotPropsHandler, self).node_properties(stateortransition)
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   394
        if hasattr(stateortransition, 'state_of'):
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diff changeset
   395
            props['shape'] = 'box'
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   396
            props['style'] = 'filled'
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diff changeset
   397
            if stateortransition.reverse_initial_state:
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diff changeset
   398
                props['fillcolor'] = '#88CC88'
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diff changeset
   399
        else:
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   400
            props['shape'] = 'ellipse'
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   401
        return props
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   402
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diff changeset
   403
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072f23f6bf83 fix typo
Aurelien Campeas <aurelien.campeas@logilab.fr>
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diff changeset
   404
class WorkflowVisitor(object):
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   405
    def __init__(self, entity):
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   406
        self.entity = entity
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   407
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   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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   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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   414
            yield transition.eid, transition
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   415
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   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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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):
9001a74fcc82 more generic dot graph generator
Stephanie Marcu <stephanie.marcu@logilab.fr>
parents: 5877
diff changeset
   428
        return WorkflowVisitor(entity)
9001a74fcc82 more generic dot graph generator
Stephanie Marcu <stephanie.marcu@logilab.fr>
parents: 5877
diff changeset
   429
9001a74fcc82 more generic dot graph generator
Stephanie Marcu <stephanie.marcu@logilab.fr>
parents: 5877
diff changeset
   430
    def build_dotpropshandler(self):
6103
072f23f6bf83 fix typo
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents: 6093
diff changeset
   431
        return WorkflowDotPropsHandler(self._cw)
5224
34e669b6fd95 [mq]: worklfow view
Sylvain Thénault <sylvain.thenault@logilab.fr>
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
7403
344aa07dd0f2 [workflow] new 'incontext-state' view for IWorkflowable entities
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 6763
diff changeset
   434
class TmpPngView(TmpFileViewMixin, EntityView):
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
   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)