OPCUA: Add browsing of variables exposed by client when selecting location from variable panel.
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This file is part of Beremiz runtime.
#
# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
# Copyright (C) 2017: Andrey Skvortsov
#
# See COPYING.Runtime file for copyrights details.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
from __future__ import absolute_import
from __future__ import print_function
import os
import collections
import platform as platform_module
from zope.interface import implements
from nevow import appserver, inevow, tags, loaders, athena, url, rend
from nevow.page import renderer
from nevow.static import File
from formless import annotate
from formless import webform
from formless import configurable
from twisted.internet import reactor
import util.paths as paths
from runtime.loglevels import LogLevels, LogLevelsDict
from runtime import MainWorker, GetPLCObjectSingleton
PAGE_TITLE = 'Beremiz Runtime Web Interface'
xhtml_header = '''<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
'''
WorkingDir = None
_PySrv = None
class PLCHMI(athena.LiveElement):
initialised = False
def HMIinitialised(self, result):
self.initialised = True
def HMIinitialisation(self):
self.HMIinitialised(None)
class DefaultPLCStartedHMI(PLCHMI):
docFactory = loaders.stan(
tags.div(render=tags.directive('liveElement'))[
tags.h1["PLC IS NOW STARTED"],
])
class PLCStoppedHMI(PLCHMI):
docFactory = loaders.stan(
tags.div(render=tags.directive('liveElement'))[
tags.h1["PLC IS STOPPED"],
])
class MainPage(athena.LiveElement):
jsClass = u"WebInterface.PLC"
docFactory = loaders.stan(
tags.invisible[
tags.div(render=tags.directive('liveElement'))[
tags.div(id='content')[
tags.div(render=tags.directive('PLCElement'))]
],
tags.a(href='settings')['Settings']])
def __init__(self, *a, **kw):
athena.LiveElement.__init__(self, *a, **kw)
self.pcl_state = False
self.HMI = None
self.resetPLCStartedHMI()
def setPLCState(self, state):
self.pcl_state = state
if self.HMI is not None:
self.callRemote('updateHMI')
def setPLCStartedHMI(self, hmi):
self.PLCStartedHMIClass = hmi
def resetPLCStartedHMI(self):
self.PLCStartedHMIClass = DefaultPLCStartedHMI
def getHMI(self):
return self.HMI
def HMIexec(self, function, *args, **kwargs):
if self.HMI is not None:
getattr(self.HMI, function, lambda: None)(*args, **kwargs)
athena.expose(HMIexec)
def resetHMI(self):
self.HMI = None
def PLCElement(self, ctx, data):
return self.getPLCElement()
renderer(PLCElement)
def getPLCElement(self):
self.detachFragmentChildren()
if self.pcl_state:
f = self.PLCStartedHMIClass()
else:
f = PLCStoppedHMI()
f.setFragmentParent(self)
self.HMI = f
return f
athena.expose(getPLCElement)
def detachFragmentChildren(self):
for child in self.liveFragmentChildren[:]:
child.detach()
class ConfigurableBindings(configurable.Configurable):
def __init__(self):
configurable.Configurable.__init__(self, None)
self.bindingsNames = []
self.infostringcount = 0
def getBindingNames(self, ctx):
return self.bindingsNames
def addInfoString(self, label, value, name=None):
if isinstance(value, str):
def default(*k):
return value
else:
def default(*k):
return value()
if name is None:
name = "_infostring_" + str(self.infostringcount)
self.infostringcount = self.infostringcount + 1
def _bind(ctx):
return annotate.Property(
name,
annotate.String(
label=label,
default=default,
immutable=True))
setattr(self, 'bind_' + name, _bind)
self.bindingsNames.append(name)
def addSettings(self, name, desc, fields, btnlabel, callback):
def _bind(ctx):
return annotate.MethodBinding(
'action_' + name,
annotate.Method(
arguments=[
annotate.Argument(*field)
for field in fields],
label=desc),
action=btnlabel)
setattr(self, 'bind_' + name, _bind)
setattr(self, 'action_' + name, callback)
self.bindingsNames.append(name)
ConfigurableSettings = ConfigurableBindings()
def newExtensionSetting(display, token):
global extensions_settings_od
settings = ConfigurableBindings()
extensions_settings_od[token] = (settings, display)
return settings
def removeExtensionSetting(token):
global extensions_settings_od
extensions_settings_od.pop(token)
class ISettings(annotate.TypedInterface):
platform = annotate.String(label=_("Platform"),
default=platform_module.system() +
" " + platform_module.release(),
immutable=True)
# TODO version ?
# pylint: disable=no-self-argument
def sendLogMessage(
ctx=annotate.Context(),
level=annotate.Choice(LogLevels,
required=True,
label=_("Log message level")),
message=annotate.String(label=_("Message text"))):
pass
sendLogMessage = annotate.autocallable(sendLogMessage,
label=_(
"Send a message to the log"),
action=_("Send"))
# pylint: disable=no-self-argument
def restartOrRepairPLC(
ctx=annotate.Context(),
action=annotate.Choice(["Restart", "Repair"],
required=True,
label=_("Action"))):
pass
restartOrRepairPLC = annotate.autocallable(restartOrRepairPLC,
label=_(
"Restart or Repair"),
action=_("Do"))
customSettingsURLs = {
}
extensions_settings_od = collections.OrderedDict()
class SettingsPage(rend.Page):
# We deserve a slash
addSlash = True
# This makes webform_css url answer some default CSS
child_webform_css = webform.defaultCSS
child_webinterface_css = File(paths.AbsNeighbourFile(__file__, 'webinterface.css'), 'text/css')
implements(ISettings)
def __getattr__(self, name):
global extensions_settings_od
if name.startswith('configurable_'):
token = name[13:]
def configurable_something(ctx):
settings, _display = extensions_settings_od[token]
return settings
return configurable_something
raise AttributeError
def extensions_settings(self, context, data):
""" Project extensions settings
Extensions added to Configuration Tree in IDE have their setting rendered here
"""
global extensions_settings_od
res = []
for token in extensions_settings_od:
_settings, display = extensions_settings_od[token]
res += [tags.h2[display], webform.renderForms(token)]
return res
docFactory = loaders.stan([tags.html[
tags.head[
tags.title[_("Beremiz Runtime Settings")],
tags.link(rel='stylesheet',
type='text/css',
href=url.here.child("webform_css")),
tags.link(rel='stylesheet',
type='text/css',
href=url.here.child("webinterface_css"))
],
tags.body[
tags.a(href='/')['Back'],
tags.h1["Runtime settings:"],
webform.renderForms('staticSettings'),
tags.h1["Extensions settings:"],
webform.renderForms('dynamicSettings'),
extensions_settings
]]])
def configurable_staticSettings(self, ctx):
return configurable.TypedInterfaceConfigurable(self)
def configurable_dynamicSettings(self, ctx):
""" Runtime Extensions settings
Extensions loaded through Beremiz_service -e or optional runtime features render setting forms here
"""
return ConfigurableSettings
def sendLogMessage(self, level, message, **kwargs):
level = LogLevelsDict[level]
GetPLCObjectSingleton().LogMessage(
level, "Web form log message: " + message)
def restartOrRepairPLC(self, action, **kwargs):
if(action == "Repair"):
GetPLCObjectSingleton().RepairPLC()
else:
MainWorker.quit()
def locateChild(self, ctx, segments):
if segments[0] in customSettingsURLs:
return customSettingsURLs[segments[0]](ctx, segments)
return super(SettingsPage, self).locateChild(ctx, segments)
class WebInterface(athena.LivePage):
docFactory = loaders.stan([tags.raw(xhtml_header),
tags.html(xmlns="http://www.w3.org/1999/xhtml")[
tags.head(render=tags.directive('liveglue'))[
tags.title[PAGE_TITLE],
tags.link(rel='stylesheet',
type='text/css',
href=url.here.child("webform_css"))
],
tags.body[
tags.div[
tags.div(
render=tags.directive(
"MainPage")),
]]]])
MainPage = MainPage()
PLCHMI = PLCHMI
def child_settings(self, context):
return SettingsPage()
def __init__(self, plcState=False, *a, **kw):
super(WebInterface, self).__init__(*a, **kw)
self.jsModules.mapping[u'WebInterface'] = paths.AbsNeighbourFile(
__file__, 'webinterface.js')
self.plcState = plcState
self.MainPage.setPLCState(plcState)
def getHMI(self):
return self.MainPage.getHMI()
def LoadHMI(self, hmi, jsmodules):
for name, path in jsmodules.iteritems():
self.jsModules.mapping[name] = os.path.join(WorkingDir, path)
self.MainPage.setPLCStartedHMI(hmi)
def UnLoadHMI(self):
self.MainPage.resetPLCStartedHMI()
def PLCStarted(self):
self.plcState = True
self.MainPage.setPLCState(True)
def PLCStopped(self):
self.plcState = False
self.MainPage.setPLCState(False)
def renderHTTP(self, ctx):
"""
Force content type to fit with SVG
"""
req = ctx.locate(inevow.IRequest)
req.setHeader('Content-type', 'application/xhtml+xml')
return super(WebInterface, self).renderHTTP(ctx)
def render_MainPage(self, ctx, data):
f = self.MainPage
f.setFragmentParent(self)
return ctx.tag[f]
def child_(self, ctx):
self.MainPage.detachFragmentChildren()
return WebInterface(plcState=self.plcState)
def beforeRender(self, ctx):
d = self.notifyOnDisconnect()
d.addErrback(self.disconnected)
def disconnected(self, reason):
self.MainPage.resetHMI()
# print reason
# print "We will be called back when the client disconnects"
def RegisterWebsite(iface, port):
website = WebInterface()
site = appserver.NevowSite(website)
reactor.listenTCP(port, site, interface=iface)
print(_('HTTP interface port :'), port)
return website
class statuslistener(object):
def __init__(self, site):
self.oldstate = None
self.site = site
def listen(self, state):
if state != self.oldstate:
action = {'Started': self.site.PLCStarted,
'Stopped': self.site.PLCStopped}.get(state, None)
if action is not None:
action()
self.oldstate = state
def website_statuslistener_factory(site):
return statuslistener(site).listen
def SetServer(pysrv):
global _PySrv
_PySrv = pysrv