plcopen/BlockInstanceCollector.py
author Edouard Tisserant <edouard.tisserant@gmail.com>
Tue, 03 Oct 2023 21:33:13 +0200
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permissions -rw-r--r--
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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 collections import OrderedDict, namedtuple
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from . XSLTModelQuery import XSLTModelQuery, _StringValue, _BoolValue, _translate_args
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# -------------------------------------------------------------------------------
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#           Helpers object for generating pou block instances list
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# -------------------------------------------------------------------------------
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_Point = namedtuple("Point", ["x", "y"])
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_BlockInstanceInfos = namedtuple(
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    "BlockInstanceInfos",
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    ["type", "id", "x", "y", "width", "height", "specific_values", "inputs", "outputs"])
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_BlockSpecificValues = (
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    namedtuple("BlockSpecificValues",
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               ["name", "execution_order"]),
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    [_StringValue, int])
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_VariableSpecificValues = (
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    namedtuple("VariableSpecificValues",
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               ["name", "value_type", "execution_order"]),
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    [_StringValue, _StringValue, int])
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_ConnectionSpecificValues = (
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    namedtuple("ConnectionSpecificValues", ["name"]),
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    [_StringValue])
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_PowerRailSpecificValues = (
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    namedtuple("PowerRailSpecificValues", ["connectors"]),
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    [int])
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_LDElementSpecificValues = (
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    namedtuple("LDElementSpecificValues",
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               ["name", "negated", "edge", "storage", "execution_order"]),
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    [_StringValue, _BoolValue, _StringValue, _StringValue, int])
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_DivergenceSpecificValues = (
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    namedtuple("DivergenceSpecificValues", ["connectors"]),
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    [int])
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_SpecificValuesTuples = {
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    "comment": (
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        namedtuple("CommentSpecificValues", ["content"]),
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        [_StringValue]),
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    "input": _VariableSpecificValues,
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    "output": _VariableSpecificValues,
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    "inout": _VariableSpecificValues,
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    "connector": _ConnectionSpecificValues,
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    "continuation": _ConnectionSpecificValues,
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    "leftPowerRail": _PowerRailSpecificValues,
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    "rightPowerRail": _PowerRailSpecificValues,
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    "contact": _LDElementSpecificValues,
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    "coil": _LDElementSpecificValues,
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    "step": (
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        namedtuple("StepSpecificValues", ["name", "initial", "action"]),
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        [_StringValue, _BoolValue, lambda x: x]),
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    "transition": (
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        namedtuple("TransitionSpecificValues",
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                   ["priority", "condition_type", "condition", "connection"]),
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        [int, _StringValue, _StringValue, lambda x: x]),
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    "selectionDivergence": _DivergenceSpecificValues,
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    "selectionConvergence": _DivergenceSpecificValues,
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    "simultaneousDivergence": _DivergenceSpecificValues,
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    "simultaneousConvergence": _DivergenceSpecificValues,
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    "jump": (
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        namedtuple("JumpSpecificValues", ["target"]),
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        [_StringValue]),
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    "actionBlock": (
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        namedtuple("ActionBlockSpecificValues", ["actions"]),
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        [lambda x: x]),
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}
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_InstanceConnectionInfos = namedtuple(
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    "InstanceConnectionInfos",
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    ["name", "negated", "edge", "position", "links"])
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_ConnectionLinkInfos = namedtuple(
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    "ConnectionLinkInfos",
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    ["refLocalId", "formalParameter", "points"])
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class _ActionInfos(object):
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    __slots__ = ["qualifier", "type", "value", "duration", "indicator"]
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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 _ActionInfos(*[getattr(self, attr) for attr in self.__slots__])
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class BlockInstanceFactory(object):
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    def __init__(self, block_instances):
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        self.BlockInstances = block_instances
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        self.CurrentInstance = None
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        self.SpecificValues = None
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        self.CurrentConnection = None
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        self.CurrentLink = None
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    def SetSpecificValues(self, context, *args):
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        self.SpecificValues = list(args)
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        self.CurrentInstance = None
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        self.CurrentConnection = None
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        self.CurrentLink = None
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    def AddBlockInstance(self, context, *args):
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        specific_values_tuple, specific_values_translation = \
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            _SpecificValuesTuples.get(args[0][0], _BlockSpecificValues)
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        if args[0][0] == "step" and len(self.SpecificValues) < 3 or \
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           args[0][0] == "transition" and len(self.SpecificValues) < 4:
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            self.SpecificValues.append([None])
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        elif args[0][0] == "actionBlock" and len(self.SpecificValues) < 1:
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            self.SpecificValues.append([[]])
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        specific_values = specific_values_tuple(*_translate_args(
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            specific_values_translation, self.SpecificValues))
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        self.SpecificValues = None
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        self.CurrentInstance = _BlockInstanceInfos(
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            *(_translate_args([_StringValue, int] + [int] * 4, args) +
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              [specific_values, [], []]))
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        self.BlockInstances[self.CurrentInstance.id] = self.CurrentInstance
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    def AddInstanceConnection(self, context, *args):
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        connection_args = _translate_args(
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            [_StringValue] * 2 + [_BoolValue, _StringValue] + [int] * 2, args)
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        self.CurrentConnection = _InstanceConnectionInfos(
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            *(connection_args[1:4] + [
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                _Point(*connection_args[4:6]), []]))
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        if self.CurrentInstance is not None:
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            if connection_args[0] == "input":
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                self.CurrentInstance.inputs.append(self.CurrentConnection)
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            else:
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                self.CurrentInstance.outputs.append(self.CurrentConnection)
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        else:
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            self.SpecificValues.append([self.CurrentConnection])
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    def AddConnectionLink(self, context, *args):
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        self.CurrentLink = _ConnectionLinkInfos(
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            *(_translate_args([int, _StringValue], args) + [[]]))
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        self.CurrentConnection.links.append(self.CurrentLink)
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    def AddLinkPoint(self, context, *args):
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        self.CurrentLink.points.append(_Point(
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            *_translate_args([int] * 2, args)))
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    def AddAction(self, context, *args):
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        if len(self.SpecificValues) == 0:
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            self.SpecificValues.append([[]])
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        translated_args = _translate_args([_StringValue] * 5, args)
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        self.SpecificValues[0][0].append(_ActionInfos(*translated_args))
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class BlockInstanceCollector(XSLTModelQuery):
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    """ object for collecting instances path list"""
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    def __init__(self, controller):
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        XSLTModelQuery.__init__(self,
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                                controller,
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                                "pou_block_instances.xslt",
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                                [(name, self.FactoryCaller(name))
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                                 for name in ["AddBlockInstance",
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                                              "SetSpecificValues",
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                                              "AddInstanceConnection",
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                                              "AddConnectionLink",
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                                              "AddLinkPoint",
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                                              "AddAction"]])
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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):
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        element_instances = OrderedDict()
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        self.factory = BlockInstanceFactory(element_instances)
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        self._process_xslt(root, debug)
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        self.factory = None
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        return element_instances