Fixed repetitive freezing of IDE when connection drops.
when connection lost error was beeing displayed, the involved wxYield
was calling pending plc status periodic update, itself trying to use connector.
At that time connector is still not destroyed and connection
is attempted again when calling GetPLCStatus.
=> Hack : Ensure connector is destroyed before reporting error.
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This file is part of Beremiz.
# See COPYING file for copyrights details.
from __future__ import absolute_import
import os
from lxml import etree
import util.paths as paths
from plcopen.structures import StdBlckLibs
ScriptDirectory = paths.AbsDir(__file__)
class XSLTModelQuery(object):
""" a class to handle XSLT queries on project and libs """
def __init__(self, controller, xsltpath, ext=None):
# arbitrary set debug to false, updated later
self.debug = False
# merge xslt extensions for library access to query specific ones
xsltext = [
("GetProject", lambda *_ignored:
[controller.GetProject(self.debug)]),
("GetStdLibs", lambda *_ignored:
[lib for lib in StdBlckLibs.values()]),
("GetExtensions", lambda *_ignored:
[ctn["types"] for ctn in controller.ConfNodeTypes])
]
if ext is not None:
xsltext.extend(ext)
# parse and compile. "beremiz" arbitrary namespace for extensions
self.xslt = etree.XSLT(
etree.parse(
os.path.join(ScriptDirectory, xsltpath),
etree.XMLParser()),
extensions={("beremiz", name): call for name, call in xsltext})
def _process_xslt(self, root, debug, **kwargs):
self.debug = debug
res = self.xslt(root, **{k: etree.XSLT.strparam(v) for k, v in kwargs.iteritems()})
# print(self.xslt.error_log)
return res
# -------------------------------------------------------------------------------
# Helpers functions for translating list of arguments
# from xslt to valid arguments
# -------------------------------------------------------------------------------
def _StringValue(x):
return x
def _BoolValue(x):
return x in ["true", "0"]
def _translate_args(translations, args):
return [translate(arg[0]) if len(arg) > 0 else None
for translate, arg in
zip(translations, args)]