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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, a Integrated Development Environment for

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# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.

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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 file for copyrights details.

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#

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# This program is free software; you can redistribute it and/or

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# modify it under the terms of the GNU General Public License

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# as published by the Free Software Foundation; either version 2

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# of the License, or (at your option) any later version.

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#

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# This program 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

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# GNU General Public License for more details.

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#

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# You should have received a copy of the GNU General Public License

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# along with this program; 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 division

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from copy import deepcopy

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import os

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import re

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import datetime

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from time import localtime

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from functools import reduce

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from future.builtins import round

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import util.paths as paths

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from plcopen import *

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from plcopen.types_enums import *

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from plcopen.InstancesPathCollector import InstancesPathCollector

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from plcopen.POUVariablesCollector import POUVariablesCollector

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from plcopen.InstanceTagnameCollector import InstanceTagnameCollector

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from plcopen.BlockInstanceCollector import BlockInstanceCollector

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from plcopen.VariableInfoCollector import VariableInfoCollector

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from graphics.GraphicCommons import *

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from PLCGenerator import *

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duration_model = re.compile(r"(?:([0-9]{1,2})h)?(?:([0-9]{1,2})m(?!s))?(?:([0-9]{1,2})s)?(?:([0-9]{1,3}(?:\.[0-9]*)?)ms)?")

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VARIABLE_NAME_SUFFIX_MODEL = re.compile(r'(\d+)$')

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ScriptDirectory = paths.AbsDir(__file__)

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    53

# Length of the buffer

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UNDO_BUFFER_LENGTH = 20

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    56

    57

class UndoBuffer(object):

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    """

    59

    Undo Buffer for PLCOpenEditor

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    Class implementing a buffer of changes made on the current editing model

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    """

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    def __init__(self, currentstate, issaved=False):

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        """

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        Constructor initialising buffer

    66

        """

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        self.Buffer = []

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        self.CurrentIndex = -1

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        self.MinIndex = -1

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        self.MaxIndex = -1

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        # if current state is defined

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        if currentstate:

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            self.CurrentIndex = 0

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            self.MinIndex = 0

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            self.MaxIndex = 0

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        # Initialising buffer with currentstate at the first place

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        for i in xrange(UNDO_BUFFER_LENGTH):

    78

            if i == 0:

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                self.Buffer.append(currentstate)

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            else:

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                self.Buffer.append(None)

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        # Initialising index of state saved

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        if issaved:

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            self.LastSave = 0

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        else:

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            self.LastSave = -1

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    88

    def Buffering(self, currentstate):

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        """

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        Add a new state in buffer

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        """

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        self.CurrentIndex = (self.CurrentIndex + 1) % UNDO_BUFFER_LENGTH

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        self.Buffer[self.CurrentIndex] = currentstate

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        # Actualising buffer limits

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        self.MaxIndex = self.CurrentIndex

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        if self.MinIndex == self.CurrentIndex:

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            # If the removed state was the state saved, there is no state saved in the buffer

    98

            if self.LastSave == self.MinIndex:

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                self.LastSave = -1

   100

            self.MinIndex = (self.MinIndex + 1) % UNDO_BUFFER_LENGTH

   101

        self.MinIndex = max(self.MinIndex, 0)

   102

   103

    def Current(self):

   104

        """

   105

        Return current state of buffer

   106

        """

   107

        return self.Buffer[self.CurrentIndex]

   108

   109

    # Change current state to previous in buffer and return new current state

   110

    def Previous(self):

   111

        if self.CurrentIndex != self.MinIndex:

   112

            self.CurrentIndex = (self.CurrentIndex - 1) % UNDO_BUFFER_LENGTH

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            return self.Buffer[self.CurrentIndex]

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        return None

   115

   116

    # Change current state to next in buffer and return new current state

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    def Next(self):

   118

        if self.CurrentIndex != self.MaxIndex:

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            self.CurrentIndex = (self.CurrentIndex + 1) % UNDO_BUFFER_LENGTH

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            return self.Buffer[self.CurrentIndex]

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        return None

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   123

    # Return True if current state is the first in buffer

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    def IsFirst(self):

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        return self.CurrentIndex == self.MinIndex

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    # Return True if current state is the last in buffer

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    def IsLast(self):

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        return self.CurrentIndex == self.MaxIndex

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    # Note that current state is saved

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    def CurrentSaved(self):

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        self.LastSave = self.CurrentIndex

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    # Return True if current state is saved

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    def IsCurrentSaved(self):

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        return self.LastSave == self.CurrentIndex

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   139

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class PLCControler(object):

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    """

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    Controler for PLCOpenEditor

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    Class which controls the operations made on the plcopen model and answers to view requests

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    """

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    # Create a new PLCControler

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    def __init__(self):

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        self.LastNewIndex = 0

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        self.Reset()

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        self.InstancesPathCollector = InstancesPathCollector(self)

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        self.POUVariablesCollector = POUVariablesCollector(self)

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        self.InstanceTagnameCollector = InstanceTagnameCollector(self)

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        self.BlockInstanceCollector = BlockInstanceCollector(self)

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        self.VariableInfoCollector = VariableInfoCollector(self)

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    # Reset PLCControler internal variables

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    def Reset(self):

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        self.Project = None

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        self.ProjectBufferEnabled = True

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        self.ProjectBuffer = None

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        self.ProjectSaved = True

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        self.Buffering = False

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        self.FilePath = ""

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        self.FileName = ""

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        self.ProgramChunks = []

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        self.ProgramOffset = 0

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        self.NextCompiledProject = None

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        self.CurrentCompiledProject = None

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        self.ConfNodeTypes = []

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        self.TotalTypesDict = StdBlckDct.copy()

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        self.TotalTypes = StdBlckLst[:]

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        self.ProgramFilePath = ""

   173

   174

    def GetQualifierTypes(self):

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        return QualifierList

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   177

    def GetProject(self, debug=False):

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        if debug and self.CurrentCompiledProject is not None:

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            return self.CurrentCompiledProject

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        else:

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            return self.Project

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   183

    # -------------------------------------------------------------------------------

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    #                         Project management functions

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    # -------------------------------------------------------------------------------

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   187

    # Return if a project is opened

   188

    def HasOpenedProject(self):

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        return self.Project is not None

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   191

    # Create a new project by replacing the current one

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    def CreateNewProject(self, properties):

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        # Create the project

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        self.Project = PLCOpenParser.CreateRoot()

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        properties["creationDateTime"] = datetime.datetime(*localtime()[:6])

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        self.Project.setfileHeader(properties)

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        self.Project.setcontentHeader(properties)

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        self.SetFilePath("")

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   200

        # Initialize the project buffer

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        self.CreateProjectBuffer(False)

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        self.ProgramChunks = []

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        self.ProgramOffset = 0

   204

        self.NextCompiledProject = self.Copy(self.Project)

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        self.CurrentCompiledProject = None

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        self.Buffering = False

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    # Return project data type names

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    def GetProjectDataTypeNames(self, debug=False):

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        project = self.GetProject(debug)

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        if project is not None:

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            return [datatype.getname() for datatype in project.getdataTypes()]

   213

        return []

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    # Return project pou names

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    def GetProjectPouNames(self, debug=False):

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        project = self.GetProject(debug)

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        if project is not None:

   219

            return [pou.getname() for pou in project.getpous()]

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        return []

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    # Return project pou names

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    def GetProjectConfigNames(self, debug=False):

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        project = self.GetProject(debug)

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        if project is not None:

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            return [config.getname() for config in project.getconfigurations()]

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        return []

   228

   229

    # Return project pou variable names

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    def GetProjectPouVariableNames(self, pou_name=None, debug=False):

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        variables = []

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        project = self.GetProject(debug)

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        if project is not None:

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            for pou in project.getpous():

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                if pou_name is None or pou_name == pou.getname():

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                    variables.extend([var.Name for var in self.GetPouInterfaceVars(pou, debug=debug)])

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                    for transition in pou.gettransitionList():

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                        variables.append(transition.getname())

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                    for action in pou.getactionList():

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                        variables.append(action.getname())

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        return variables

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   243

    # Return file path if project is an open file

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    def GetFilePath(self):

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        return self.FilePath

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    # Return file path if project is an open file

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    def GetProgramFilePath(self):

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        return self.ProgramFilePath

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   251

    # Return file name and point out if file is up to date

   252

    def GetFilename(self):

   253

        if self.Project is not None:

   254

            if self.ProjectIsSaved():

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                return self.FileName

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            else:

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                return "~%s~" % self.FileName

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        return ""

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   260

    # Change file path and save file name or create a default one if file path not defined

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    def SetFilePath(self, filepath):

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        self.FilePath = filepath

   263

        if filepath == "":

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            self.LastNewIndex += 1

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            self.FileName = _("Unnamed%d") % self.LastNewIndex

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        else:

   267

            self.FileName = os.path.splitext(os.path.basename(filepath))[0]

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   269

    # Change project properties

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    def SetProjectProperties(self, name=None, properties=None, buffer=True):

   271

        if self.Project is not None:

   272

            if name is not None:

   273

                self.Project.setname(name)

   274

            if properties is not None:

   275

                self.Project.setfileHeader(properties)

   276

                self.Project.setcontentHeader(properties)

   277

            if buffer and (name is not None or properties is not None):

   278

                self.BufferProject()

   279

   280

    # Return project name

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    def GetProjectName(self, debug=False):

   282

        project = self.GetProject(debug)

   283

        if project is not None:

   284

            return project.getname()

   285

        return None

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   287

    # Return project properties

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    def GetProjectProperties(self, debug=False):

   289

        project = self.GetProject(debug)

   290

        if project is not None:

   291

            properties = project.getfileHeader()

   292

            properties.update(project.getcontentHeader())

   293

            return properties

   294

        return None

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   296

    # Return project informations

   297

    def GetProjectInfos(self, debug=False):

   298

        project = self.GetProject(debug)

   299

        if project is not None:

   300

            infos = {"name": project.getname(), "type": ITEM_PROJECT}

   301

            datatypes = {"name": DATA_TYPES, "type": ITEM_DATATYPES, "values": []}

   302

            for datatype in project.getdataTypes():

   303

                datatypes["values"].append({

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                    "name": datatype.getname(),

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                    "type": ITEM_DATATYPE,

   306

                    "tagname": ComputeDataTypeName(datatype.getname()),

   307

                    "values": []})

   308

            pou_types = {

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                "function": {

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                    "name":   FUNCTIONS,

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                    "type":   ITEM_FUNCTION,

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                    "values": []

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                },

   314

                "functionBlock": {

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                    "name":   FUNCTION_BLOCKS,

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                    "type":   ITEM_FUNCTIONBLOCK,

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                    "values": []

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                },

   319

                "program": {

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                    "name":   PROGRAMS,

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                    "type":   ITEM_PROGRAM,

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                    "values": []

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                }

   324

            }

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            for pou in project.getpous():

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                pou_type = pou.getpouType()

   327

                pou_infos = {"name": pou.getname(), "type": ITEM_POU,

   328

                             "tagname": ComputePouName(pou.getname())}

   329

                pou_values = []

   330

                if pou.getbodyType() == "SFC":

   331

                    transitions = []

   332

                    for transition in pou.gettransitionList():

   333

                        transitions.append({

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                            "name": transition.getname(),

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                            "type": ITEM_TRANSITION,

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                            "tagname": ComputePouTransitionName(pou.getname(), transition.getname()),

   337

                            "values": []})

   338

                    pou_values.append({"name": TRANSITIONS, "type": ITEM_TRANSITIONS, "values": transitions})

   339

                    actions = []

   340

                    for action in pou.getactionList():

   341

                        actions.append({

   342

                            "name": action.getname(),

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                            "type": ITEM_ACTION,

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                            "tagname": ComputePouActionName(pou.getname(), action.getname()),

   345

                            "values": []})

   346

                    pou_values.append({"name": ACTIONS, "type": ITEM_ACTIONS, "values": actions})

   347

                if pou_type in pou_types:

   348

                    pou_infos["values"] = pou_values

   349

                    pou_types[pou_type]["values"].append(pou_infos)

   350

            configurations = {"name": CONFIGURATIONS, "type": ITEM_CONFIGURATIONS, "values": []}

   351

            for config in project.getconfigurations():

   352

                config_name = config.getname()

   353

                config_infos = {

   354

                    "name": config_name,

   355

                    "type": ITEM_CONFIGURATION,

   356

                    "tagname": ComputeConfigurationName(config.getname()),

   357

                    "values": []}

   358

                resources = {"name": RESOURCES, "type": ITEM_RESOURCES, "values": []}

   359

                for resource in config.getresource():

   360

                    resource_name = resource.getname()

   361

                    resource_infos = {

   362

                        "name": resource_name,

   363

                        "type": ITEM_RESOURCE,

   364

                        "tagname": ComputeConfigurationResourceName(config.getname(), resource.getname()),

   365

                        "values": []}

   366

                    resources["values"].append(resource_infos)

   367

                config_infos["values"] = [resources]

   368

                configurations["values"].append(config_infos)

   369

            infos["values"] = [datatypes, pou_types["function"], pou_types["functionBlock"],

   370

                               pou_types["program"], configurations]

   371

            return infos

   372

        return None

   373

   374

    def GetPouVariables(self, tagname, debug=False):

   375

        project = self.GetProject(debug)

   376

        if project is not None:

   377

            obj = None

   378

            words = tagname.split("::")

   379

            if words[0] == "P":

   380

                obj = self.GetPou(words[1], debug)

   381

            elif words[0] != "D":

   382

                obj = self.GetEditedElement(tagname, debug)

   383

            if obj is not None:

   384

                return self.POUVariablesCollector.Collect(obj, debug)

   385

   386

        return None

   387

   388

    def GetInstanceList(self, root, name, debug=False):

   389

        return self.InstancesPathCollector.Collect(root, name, debug)

   390

   391

    def SearchPouInstances(self, tagname, debug=False):

   392

        project = self.GetProject(debug)

   393

        if project is not None:

   394

            words = tagname.split("::")

   395

            if words[0] == "P":

   396

                return self.GetInstanceList(project, words[1])

   397

            elif words[0] == 'C':

   398

                return [words[1]]

   399

            elif words[0] == 'R':

   400

                return ["%s.%s" % (words[1], words[2])]

   401

            elif words[0] in ['T', 'A']:

   402

                return ["%s.%s" % (instance, words[2])

   403

                        for instance in self.SearchPouInstances(

   404

                            ComputePouName(words[1]), debug)]

   405

        return []

   406

   407

    def GetPouInstanceTagName(self, instance_path, debug=False):

   408

        project = self.GetProject(debug)

   409

        if project is not None:

   410

            return self.InstanceTagnameCollector.Collect(project,

   411

                                                         debug,

   412

                                                         instance_path)

   413

   414

    def GetInstanceInfos(self, instance_path, debug=False):

   415

        tagname = self.GetPouInstanceTagName(instance_path)

   416

        if tagname is not None:

   417

            infos = self.GetPouVariables(tagname, debug)

   418

            infos.type = tagname

   419

            return infos

   420

        else:

   421

            pou_path, var_name = instance_path.rsplit(".", 1)

   422

            tagname = self.GetPouInstanceTagName(pou_path)

   423

            if tagname is not None:

   424

                pou_infos = self.GetPouVariables(tagname, debug)

   425

                for var_infos in pou_infos.variables:

   426

                    if var_infos.name == var_name:

   427

                        return var_infos

   428

        return None

   429

   430

    # Return if data type given by name is used by another data type or pou

   431

    def DataTypeIsUsed(self, name, debug=False):

   432

        project = self.GetProject(debug)

   433

        if project is not None:

   434

            return len(self.GetInstanceList(project, name, debug)) > 0

   435

        return False

   436

   437

    # Return if pou given by name is used by another pou

   438

    def PouIsUsed(self, name, debug=False):

   439

        project = self.GetProject(debug)

   440

        if project is not None:

   441

            return len(self.GetInstanceList(project, name, debug)) > 0

   442

        return False

   443

   444

    # Return if pou given by name is directly or undirectly used by the reference pou

   445

    def PouIsUsedBy(self, name, reference, debug=False):

   446

        pou_infos = self.GetPou(reference, debug)

   447

        if pou_infos is not None:

   448

            return len(self.GetInstanceList(pou_infos, name, debug)) > 0

   449

        return False

   450

   451

    def GenerateProgram(self, filepath=None):

   452

        errors = []

   453

        warnings = []

   454

        if self.Project is not None:

   455

            try:

   456

                self.ProgramChunks = GenerateCurrentProgram(self, self.Project, errors, warnings)

   457

                self.NextCompiledProject = self.Copy(self.Project)

   458

                program_text = "".join([item[0] for item in self.ProgramChunks])

   459

                if filepath is not None:

   460

                    programfile = open(filepath, "w")

   461

                    programfile.write(program_text.encode("utf-8"))

   462

                    programfile.close()

   463

                    self.ProgramFilePath = filepath

   464

                return program_text, errors, warnings

   465

            except PLCGenException as ex:

   466

                errors.append(str(ex))

   467

        else:

   468

            errors.append("No project opened")

   469

        return "", errors, warnings

   470

   471

    def DebugAvailable(self):

   472

        return self.CurrentCompiledProject is not None

   473

   474

    def ProgramTransferred(self):

   475

        if self.NextCompiledProject is None:

   476

            self.CurrentCompiledProject = self.NextCompiledProject

   477

        else:

   478

            self.CurrentCompiledProject = self.Copy(self.Project)

   479

   480

    def GetChunkInfos(self, from_location, to_location):

   481

        row = self.ProgramOffset + 1

   482

        col = 1

   483

        infos = []

   484

        for chunk, chunk_infos in self.ProgramChunks:

   485

            lines = chunk.split("\n")

   486

            if len(lines) > 1:

   487

                next_row = row + len(lines) - 1

   488

                next_col = len(lines[-1]) + 1

   489

            else:

   490

                next_row = row

   491

                next_col = col + len(chunk)

   492

            if (next_row > from_location[0] or next_row == from_location[0] and next_col >= from_location[1]) and len(chunk_infos) > 0:

   493

                infos.append((chunk_infos, (row, col)))

   494

            if next_row == to_location[0] and next_col > to_location[1] or next_row > to_location[0]:

   495

                return infos

   496

            row, col = next_row, next_col

   497

        return infos

   498

   499

    # -------------------------------------------------------------------------------

   500

    #                        Project Pous management functions

   501

    # -------------------------------------------------------------------------------