plcopen/VariableInfoCollector.py
author Edouard Tisserant
Wed, 21 Sep 2022 11:41:28 +0200
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child 3750 f62625418bff
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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.
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# See COPYING file for copyrights details.
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from __future__ import absolute_import
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from plcopen.XSLTModelQuery import XSLTModelQuery, _StringValue, _BoolValue, _translate_args
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# -------------------------------------------------------------------------------
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#                 Helpers object for generating pou var list
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# -------------------------------------------------------------------------------
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class _VariableInfos(object):
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    __slots__ = ["Name", "Class", "Option", "Location", "InitialValue",
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                 "Edit", "Documentation", "Type", "Tree", "Number"]
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    def __init__(self, *args):
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        for attr, value in zip(self.__slots__, args):
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            setattr(self, attr, value if value is not None else "")
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    def copy(self):
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        return _VariableInfos(*[getattr(self, attr) for attr in self.__slots__])
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class VariablesInfosFactory(object):
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    """ Helpers object for generating pou var list """
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    def __init__(self, variables):
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        self.Variables = variables
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        self.TreeStack = []
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        self.Type = None
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        self.Dimensions = None
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    def SetType(self, context, *args):
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        self.Type = args[0][0]
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    def GetType(self):
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        if len(self.Dimensions) > 0:
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            return ("array", self.Type, self.Dimensions)
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        return self.Type
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    def GetTree(self):
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        return (self.TreeStack.pop(-1), self.Dimensions)
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    def AddDimension(self, context, *args):
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        self.Dimensions.append(tuple(
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            _translate_args([_StringValue] * 2, args)))
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    def AddTree(self, context, *args):
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        self.TreeStack.append([])
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        self.Dimensions = []
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    def AddVarToTree(self, context, *args):
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        var = (args[0][0], self.Type, self.GetTree())
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        self.TreeStack[-1].append(var)
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    def AddVariable(self, context, *args):
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        self.Variables.append(_VariableInfos(*(
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            _translate_args([_StringValue] * 5 + [_BoolValue] + [_StringValue], args) +
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            [self.GetType(), self.GetTree()])))
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class VariableInfoCollector(XSLTModelQuery):
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    def __init__(self, controller):
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        XSLTModelQuery.__init__(self,
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                                controller,
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                                "variables_infos.xslt",
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                                [(name, self.FactoryCaller(name))
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                                 for name in [
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                                     "SetType",
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                                     "AddDimension",
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                                     "AddTree",
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                                     "AddVarToTree",
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                                     "AddVariable"]])
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    def FactoryCaller(self, funcname):
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        def CallFactory(*args):
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            return getattr(self.factory, funcname)(*args)
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        return CallFactory
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    def Collect(self, root, debug, variables, tree):
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        self.factory = VariablesInfosFactory(variables)
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        self._process_xslt(root, debug, tree=str(tree))
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        res = self.factory
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        self.factory = None
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        return res