runtime/NevowServer.py
author Edouard Tisserant <edouard.tisserant@gmail.com>
Thu, 19 Mar 2020 09:31:07 +0100
branchsvghmi
changeset 2886 6c82fad8be65
parent 2311 bef2b4b87370
child 2649 db68cb0e6bdc
permissions -rw-r--r--
SVGHMI: Simplification and optimization. func:parselabel becomes a template.

All labels are parsed into a global variable containing resulting widget
description as a node-set. func:widget(id) was added for random access to
widget description.
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# This file is part of Beremiz runtime.
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#
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# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
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# Copyright (C) 2017: Andrey Skvortsov
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#
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# See COPYING.Runtime file for copyrights details.
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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# Lesser General Public License for more details.
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cefc9219bb48 runtime is licensed under LGPLv2.1
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
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from __future__ import absolute_import
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from __future__ import print_function
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import os
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import platform as platform_module
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from zope.interface import implements
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from nevow import appserver, inevow, tags, loaders, athena, url, rend
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from nevow.page import renderer
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from nevow.static import File
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from formless import annotate
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from formless import webform
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from formless import configurable
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from twisted.internet import reactor
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import util.paths as paths
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from runtime.loglevels import LogLevels, LogLevelsDict
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PAGE_TITLE = 'Beremiz Runtime Web Interface'
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xhtml_header = '''<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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'''
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WorkingDir = None
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_PySrv = None
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class PLCHMI(athena.LiveElement):
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    initialised = False
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    def HMIinitialised(self, result):
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        self.initialised = True
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    def HMIinitialisation(self):
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        self.HMIinitialised(None)
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class DefaultPLCStartedHMI(PLCHMI):
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    docFactory = loaders.stan(
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        tags.div(render=tags.directive('liveElement'))[
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            tags.h1["PLC IS NOW STARTED"],
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        ])
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class PLCStoppedHMI(PLCHMI):
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    docFactory = loaders.stan(
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        tags.div(render=tags.directive('liveElement'))[
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            tags.h1["PLC IS STOPPED"],
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        ])
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class MainPage(athena.LiveElement):
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    jsClass = u"WebInterface.PLC"
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    docFactory = loaders.stan(
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        tags.invisible[
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            tags.div(render=tags.directive('liveElement'))[
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                tags.div(id='content')[
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                    tags.div(render=tags.directive('PLCElement'))]
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            ],
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            tags.a(href='settings')['Settings']])
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    def __init__(self, *a, **kw):
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        athena.LiveElement.__init__(self, *a, **kw)
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        self.pcl_state = False
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        self.HMI = None
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        self.resetPLCStartedHMI()
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    def setPLCState(self, state):
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        self.pcl_state = state
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        if self.HMI is not None:
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            self.callRemote('updateHMI')
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    def setPLCStartedHMI(self, hmi):
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        self.PLCStartedHMIClass = hmi
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    def resetPLCStartedHMI(self):
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        self.PLCStartedHMIClass = DefaultPLCStartedHMI
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    def getHMI(self):
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        return self.HMI
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    def HMIexec(self, function, *args, **kwargs):
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        if self.HMI is not None:
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            getattr(self.HMI, function, lambda: None)(*args, **kwargs)
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    athena.expose(HMIexec)
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    def resetHMI(self):
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        self.HMI = None
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    def PLCElement(self, ctx, data):
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        return self.getPLCElement()
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    renderer(PLCElement)
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    def getPLCElement(self):
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        self.detachFragmentChildren()
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        if self.pcl_state:
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            f = self.PLCStartedHMIClass()
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        else:
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            f = PLCStoppedHMI()
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        f.setFragmentParent(self)
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        self.HMI = f
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        return f
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    athena.expose(getPLCElement)
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    def detachFragmentChildren(self):
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        for child in self.liveFragmentChildren[:]:
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            child.detach()
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class ConfigurableBindings(configurable.Configurable):
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    def __init__(self):
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        configurable.Configurable.__init__(self, None)
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        self.bindingsNames = []
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        self.infostringcount = 0
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    def getBindingNames(self, ctx):
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        return self.bindingsNames
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    def addInfoString(self, label, value, name=None):
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        if isinstance(value, str):
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            def default(*k):
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                return value
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        else:
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            def default(*k):
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                return value()
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        if name is None:
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            name = "_infostring_" + str(self.infostringcount)
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            self.infostringcount = self.infostringcount + 1
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        def _bind(ctx):
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            return annotate.Property(
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                name,
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                annotate.String(
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                    label=label,
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                    default=default,
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                    immutable=True))
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        setattr(self, 'bind_' + name, _bind)
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        self.bindingsNames.append(name)
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    def addSettings(self, name, desc, fields, btnlabel, callback):
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        def _bind(ctx):
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            return annotate.MethodBinding(
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                'action_' + name,
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                annotate.Method(
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                    arguments=[
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                        annotate.Argument(*field)
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                        for field in fields],
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                    label=desc),
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                action=btnlabel)
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        setattr(self, 'bind_' + name, _bind)
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        setattr(self, 'action_' + name, callback)
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        self.bindingsNames.append(name)
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ConfigurableSettings = ConfigurableBindings()
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class ISettings(annotate.TypedInterface):
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    platform = annotate.String(label=_("Platform"),
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                               default=platform_module.system() +
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                               " " + platform_module.release(),
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                               immutable=True)
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    # TODO version ?
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    # pylint: disable=no-self-argument
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    def sendLogMessage(
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            ctx=annotate.Context(),
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            level=annotate.Choice(LogLevels,
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                                  required=True,
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                                  label=_("Log message level")),
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            message=annotate.String(label=_("Message text"))):
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        pass
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    sendLogMessage = annotate.autocallable(sendLogMessage,
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                                           label=_(
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                                               "Send a message to the log"),
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                                           action=_("Send"))
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customSettingsURLs = {
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}
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class SettingsPage(rend.Page):
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    # We deserve a slash
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    addSlash = True
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    # This makes webform_css url answer some default CSS
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    child_webform_css = webform.defaultCSS
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    child_webinterface_css = File(paths.AbsNeighbourFile(__file__, 'webinterface.css'), 'text/css')
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    implements(ISettings)
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    docFactory = loaders.stan([tags.html[
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        tags.head[
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            tags.title[_("Beremiz Runtime Settings")],
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            tags.link(rel='stylesheet',
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                      type='text/css',
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                      href=url.here.child("webform_css")),
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            tags.link(rel='stylesheet',
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                      type='text/css',
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                      href=url.here.child("webinterface_css"))
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        ],
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        tags.body[
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            tags.a(href='/')['Back'],
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            tags.h1["Runtime settings:"],
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            webform.renderForms('staticSettings'),
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            tags.h1["Extensions settings:"],
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            webform.renderForms('dynamicSettings'),
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        ]]])
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    def configurable_staticSettings(self, ctx):
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        return configurable.TypedInterfaceConfigurable(self)
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    def configurable_dynamicSettings(self, ctx):
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        return ConfigurableSettings
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    def sendLogMessage(self, level, message, **kwargs):
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        level = LogLevelsDict[level]
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        if _PySrv.plcobj is not None:
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            _PySrv.plcobj.LogMessage(
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                level, "Web form log message: " + message)
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    def locateChild(self, ctx, segments):
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        if segments[0] in customSettingsURLs:
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            return customSettingsURLs[segments[0]](ctx, segments)
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        return super(SettingsPage, self).locateChild(ctx, segments)
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class WebInterface(athena.LivePage):
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    docFactory = loaders.stan([tags.raw(xhtml_header),
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                               tags.html(xmlns="http://www.w3.org/1999/xhtml")[
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                                   tags.head(render=tags.directive('liveglue'))[
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                                       tags.title[PAGE_TITLE],
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                                       tags.link(rel='stylesheet',
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                                                 type='text/css',
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                                                 href=url.here.child("webform_css"))
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                                   ],
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                                   tags.body[
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                                       tags.div[
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                                           tags.div(
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                                               render=tags.directive(
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                                                   "MainPage")),
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                                       ]]]])
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    MainPage = MainPage()
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    PLCHMI = PLCHMI
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    def child_settings(self, context):
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        return SettingsPage()
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    def __init__(self, plcState=False, *a, **kw):
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        super(WebInterface, self).__init__(*a, **kw)
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        self.jsModules.mapping[u'WebInterface'] = paths.AbsNeighbourFile(
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            __file__, 'webinterface.js')
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        self.plcState = plcState
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        self.MainPage.setPLCState(plcState)
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    def getHMI(self):
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        return self.MainPage.getHMI()
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    def LoadHMI(self, hmi, jsmodules):
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        for name, path in jsmodules.iteritems():
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            self.jsModules.mapping[name] = os.path.join(WorkingDir, path)
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        self.MainPage.setPLCStartedHMI(hmi)
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    def UnLoadHMI(self):
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        self.MainPage.resetPLCStartedHMI()
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    def PLCStarted(self):
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        self.plcState = True
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        self.MainPage.setPLCState(True)
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    def PLCStopped(self):
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        self.plcState = False
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        self.MainPage.setPLCState(False)
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    def renderHTTP(self, ctx):
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        """
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        Force content type to fit with SVG
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        """
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        req = ctx.locate(inevow.IRequest)
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        req.setHeader('Content-type', 'application/xhtml+xml')
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        return super(WebInterface, self).renderHTTP(ctx)
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    def render_MainPage(self, ctx, data):
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        f = self.MainPage
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        f.setFragmentParent(self)
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        return ctx.tag[f]
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    def child_(self, ctx):
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        self.MainPage.detachFragmentChildren()
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        return WebInterface(plcState=self.plcState)
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    def beforeRender(self, ctx):
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        d = self.notifyOnDisconnect()
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        d.addErrback(self.disconnected)
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    def disconnected(self, reason):
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        self.MainPage.resetHMI()
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        # print reason
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        # print "We will be called back when the client disconnects"
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def RegisterWebsite(iface, port):
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    website = WebInterface()
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    site = appserver.NevowSite(website)
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    reactor.listenTCP(port, site, interface=iface)
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    print(_('HTTP interface port :'), port)
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    return website
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class statuslistener(object):
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    def __init__(self, site):
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        self.oldstate = None
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        self.site = site
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    def listen(self, state):
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        if state != self.oldstate:
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            action = {'Started': self.site.PLCStarted,
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                      'Stopped': self.site.PLCStopped}.get(state, None)
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            if action is not None:
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                action()
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            self.oldstate = state
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def website_statuslistener_factory(site):
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    return statuslistener(site).listen
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def SetServer(pysrv):
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    global _PySrv
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    _PySrv = pysrv