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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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#

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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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import os

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import sys

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import re

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import datetime

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from types import *

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from xml.dom import minidom

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from xml.sax.saxutils import escape, unescape, quoteattr

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from lxml import etree

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from new import classobj

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from collections import OrderedDict

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def CreateNode(name):

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    node = minidom.Node()

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    node.nodeName = name

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    node._attrs = {}

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    node.childNodes = []

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    return node

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    44

    45

def NodeRenameAttr(node, old_name, new_name):

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    node._attrs[new_name] = node._attrs.pop(old_name)

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    48

    49

def NodeSetAttr(node, name, value):

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    attr = minidom.Attr(name)

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    text = minidom.Text()

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    text.data = value

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    attr.childNodes[0] = text

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    node._attrs[name] = attr

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    56

    57

"""

    58

Regular expression models for checking all kind of string values defined in XML

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standard

    60

"""

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Name_model = re.compile('([a-zA-Z_\:][\w\.\-\:]*)$')

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Names_model = re.compile('([a-zA-Z_\:][\w\.\-\:]*(?: [a-zA-Z_\:][\w\.\-\:]*)*)$')

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NMToken_model = re.compile('([\w\.\-\:]*)$')

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NMTokens_model = re.compile('([\w\.\-\:]*(?: [\w\.\-\:]*)*)$')

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QName_model = re.compile('((?:[a-zA-Z_][\w]*:)?[a-zA-Z_][\w]*)$')

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QNames_model = re.compile('((?:[a-zA-Z_][\w]*:)?[a-zA-Z_][\w]*(?: (?:[a-zA-Z_][\w]*:)?[a-zA-Z_][\w]*)*)$')

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NCName_model = re.compile('([a-zA-Z_][\w]*)$')

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URI_model = re.compile('((?:http://|/)?(?:[\w.-]*/?)*)$')

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LANGUAGE_model = re.compile('([a-zA-Z]{1,8}(?:-[a-zA-Z0-9]{1,8})*)$')

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    71

ONLY_ANNOTATION = re.compile("((?:annotation )?)")

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    73

"""

    74

Regular expression models for extracting dates and times from a string

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"""

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time_model = re.compile('([0-9]{2}):([0-9]{2}):([0-9]{2}(?:\.[0-9]*)?)(?:Z)?$')

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date_model = re.compile('([0-9]{4})-([0-9]{2})-([0-9]{2})((?:[\-\+][0-9]{2}:[0-9]{2})|Z)?$')

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datetime_model = re.compile('([0-9]{4})-([0-9]{2})-([0-9]{2})[ T]([0-9]{2}):([0-9]{2}):([0-9]{2}(?:\.[0-9]*)?)((?:[\-\+][0-9]{2}:[0-9]{2})|Z)?$')

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    80

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class xml_timezone(datetime.tzinfo):

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    83

    def SetOffset(self, offset):

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        if offset == "Z":

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            self.__offset = timedelta(minutes=0)

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            self.__name = "UTC"

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        else:

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            sign = {"-": -1, "+": 1}[offset[0]]

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            hours, minutes = [int(val) for val in offset[1:].split(":")]

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            self.__offset = timedelta(minutes=sign * (hours * 60 + minutes))

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            self.__name = ""

    92

    93

    def utcoffset(self, dt):

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        return self.__offset

    95

    96

    def tzname(self, dt):

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        return self.__name

    98

    99

    def dst(self, dt):

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        return ZERO

   101

   102

   103

[

   104

    SYNTAXELEMENT, SYNTAXATTRIBUTE, SIMPLETYPE, COMPLEXTYPE, COMPILEDCOMPLEXTYPE,

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    ATTRIBUTESGROUP, ELEMENTSGROUP, ATTRIBUTE, ELEMENT, CHOICE, ANY, TAG, CONSTRAINT,

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] = range(13)

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   108

   109

def NotSupportedYet(type):

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    """

   111

    Function that generates a function that point out to user that datatype

   112

    used is not supported by xmlclass yet

   113

    @param type: data type

   114

    @return: function generated

   115

    """

   116

    def GetUnknownValue(attr):

   117

        raise ValueError("\"%s\" type isn't supported by \"xmlclass\" yet!" % type)

   118

    return GetUnknownValue

   119

   120

   121

def getIndent(indent, balise):

   122

    """

   123

    This function calculates the number of whitespace for indentation

   124

    """

   125

    first = indent * 2

   126

    second = first + len(balise) + 1

   127

    return u'\t'.expandtabs(first), u'\t'.expandtabs(second)

   128

   129

   130

def GetAttributeValue(attr, extract=True):

   131

    """

   132

    Function that extracts data from a tree node

   133

    @param attr: tree node containing data to extract

   134

    @param extract: attr is a tree node or not

   135

    @return: data extracted as string

   136

    """

   137

    if not extract:

   138

        return attr

   139

    if len(attr.childNodes) == 1:

   140

        return unicode(unescape(attr.childNodes[0].data))

   141

    else:

   142

        # content is a CDATA

   143

        text = u''

   144

        for node in attr.childNodes:

   145

            if not (node.nodeName == "#text" and node.data.strip() == u''):

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                text += unicode(unescape(node.data))

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        return text

   148

   149

   150

def GetNormalizedString(attr, extract=True):

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    """

   152

    Function that normalizes a string according to XML 1.0. Replace

   153

    tabulations, line feed and carriage return by white space

   154

    @param attr: tree node containing data to extract or data to normalize

   155

    @param extract: attr is a tree node or not

   156

    @return: data normalized as string

   157

    """

   158

    if extract:

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        value = GetAttributeValue(attr)

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    else:

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        value = attr

   162

    return value.replace("\t", " ").replace("\r", " ").replace("\n", " ")

   163

   164

   165

def GetToken(attr, extract=True):

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    """

   167

    Function that tokenizes a string according to XML 1.0. Remove any leading

   168

    and trailing white space and replace internal sequence of two or more

   169

    spaces by only one white space

   170

    @param attr: tree node containing data to extract or data to tokenize

   171

    @param extract: attr is a tree node or not

   172

    @return: data tokenized as string

   173

    """

   174

    return " ".join([part for part in

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                     GetNormalizedString(attr, extract).split(" ")

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                     if part])

   177

   178

   179

def GetHexInteger(attr, extract=True):

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    """

   181

    Function that extracts an hexadecimal integer from a tree node or a string

   182

    @param attr: tree node containing data to extract or data as a string

   183

    @param extract: attr is a tree node or not

   184

    @return: data as an integer

   185

    """

   186

    if extract:

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        value = GetAttributeValue(attr)

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    else:

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        value = attr

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    if len(value) % 2 != 0:

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        raise ValueError("\"%s\" isn't a valid hexadecimal integer!" % value)

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    try:

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        return int(value, 16)

   194

    except:

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        raise ValueError("\"%s\" isn't a valid hexadecimal integer!" % value)

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   197

   198

def GenerateIntegerExtraction(minInclusive=None, maxInclusive=None,

   199

                              minExclusive=None, maxExclusive=None):

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    """

   201

    Function that generates an extraction function for integer defining min and

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    max of integer value

   203

    @param minInclusive: inclusive minimum

   204

    @param maxInclusive: inclusive maximum

   205

    @param minExclusive: exclusive minimum

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    @param maxExclusive: exclusive maximum

   207

    @return: function generated

   208

    """

   209

    def GetInteger(attr, extract=True):

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        """

   211

        Function that extracts an integer from a tree node or a string

   212

        @param attr: tree node containing data to extract or data as a string

   213

        @param extract: attr is a tree node or not

   214

        @return: data as an integer

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        """

   216

   217

        if extract:

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            value = GetAttributeValue(attr)

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        else:

   220

            value = attr

   221

        try:

   222

            # TODO: permit to write value like 1E2

   223

            value = int(value)

   224

        except:

   225

            raise ValueError("\"%s\" isn't a valid integer!" % value)

   226

        if minInclusive is not None and value < minInclusive:

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            raise ValueError("\"%d\" isn't greater or equal to %d!" %

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                             (value, minInclusive))

   229

        if maxInclusive is not None and value > maxInclusive:

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            raise ValueError("\"%d\" isn't lesser or equal to %d!" %

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                             (value, maxInclusive))

   232

        if minExclusive is not None and value <= minExclusive:

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            raise ValueError("\"%d\" isn't greater than %d!" %

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                             (value, minExclusive))

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        if maxExclusive is not None and value >= maxExclusive:

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            raise ValueError("\"%d\" isn't lesser than %d!" %

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                             (value, maxExclusive))

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        return value

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    return GetInteger

   240

   241

   242

def GenerateFloatExtraction(type, extra_values=[]):

   243

    """

   244

    Function that generates an extraction function for float

   245

    @param type: name of the type of float

   246

    @return: function generated

   247

    """

   248

    def GetFloat(attr, extract=True):

   249

        """

   250

        Function that extracts a float from a tree node or a string

   251

        @param attr: tree node containing data to extract or data as a string

   252

        @param extract: attr is a tree node or not

   253

        @return: data as a float

   254

        """

   255

        if extract:

   256

            value = GetAttributeValue(attr)

   257

        else:

   258

            value = attr

   259

        if value in extra_values:

   260

            return value

   261

        try:

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            return float(value)

   263

        except:

   264

            raise ValueError("\"%s\" isn't a valid %s!" % (value, type))

   265

    return GetFloat

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   267

   268

def GetBoolean(attr, extract=True):

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    """

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    Function that extracts a boolean from a tree node or a string

   271

    @param attr: tree node containing data to extract or data as a string

   272

    @param extract: attr is a tree node or not

   273

    @return: data as a boolean

   274

    """

   275

    if extract:

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        value = GetAttributeValue(attr)

   277

    else:

   278

        value = attr

   279

    if value == "true" or value == "1":

   280

        return True

   281

    elif value == "false" or value == "0":

   282

        return False

   283

    else:

   284

        raise ValueError("\"%s\" isn't a valid boolean!" % value)

   285

   286

   287

def GetTime(attr, extract=True):

   288

    """

   289

    Function that extracts a time from a tree node or a string

   290

    @param attr: tree node containing data to extract or data as a string

   291

    @param extract: attr is a tree node or not

   292

    @return: data as a time

   293

    """

   294

    if extract:

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        value = GetAttributeValue(attr)

   296

    else:

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        value = attr

   298

    result = time_model.match(value)

   299

    if result:

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        values = result.groups()

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        time_values = [int(v) for v in values[:2]]

   302

        seconds = float(values[2])

   303

        time_values.extend([int(seconds), int((seconds % 1) * 1000000)])

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        return datetime.time(*time_values)

   305

    else:

   306

        raise ValueError("\"%s\" isn't a valid time!" % value)

   307

   308

   309

def GetDate(attr, extract=True):

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    """

   311

    Function that extracts a date from a tree node or a string

   312

    @param attr: tree node containing data to extract or data as a string

   313

    @param extract: attr is a tree node or not

   314

    @return: data as a date

   315

    """

   316

    if extract:

   317

        value = GetAttributeValue(attr)

   318

    else:

   319

        value = attr

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    result = date_model.match(value)

   321

    if result:

   322

        values = result.groups()

   323

        date_values = [int(v) for v in values[:3]]

   324

        if values[3] is not None:

   325

            tz = xml_timezone()

   326

            tz.SetOffset(values[3])

   327

            date_values.append(tz)

   328

        return datetime.date(*date_values)

   329

    else:

   330

        raise ValueError("\"%s\" isn't a valid date!" % value)

   331

   332

   333

def GetDateTime(attr, extract=True):

   334

    """

   335

    Function that extracts date and time from a tree node or a string

   336

    @param attr: tree node containing data to extract or data as a string

   337

    @param extract: attr is a tree node or not

   338

    @return: data as date and time

   339

    """

   340

    if extract:

   341

        value = GetAttributeValue(attr)

   342

    else:

   343

        value = attr

   344

    result = datetime_model.match(value)

   345

    if result:

   346

        values = result.groups()

   347

        datetime_values = [int(v) for v in values[:5]]

   348

        seconds = float(values[5])

   349

        datetime_values.extend([int(seconds), int((seconds % 1) * 1000000)])

   350

        if values[6] is not None:

   351

            tz = xml_timezone()

   352

            tz.SetOffset(values[6])

   353

            datetime_values.append(tz)

   354

        return datetime.datetime(*datetime_values)

   355

    else:

   356

        raise ValueError("\"%s\" isn't a valid datetime!" % value)

   357

   358

   359

def GenerateModelNameExtraction(type, model):

   360

    """

   361

    Function that generates an extraction function for string matching a model

   362

    @param type: name of the data type

   363

    @param model: model that data must match

   364

    @return: function generated

   365

    """

   366

    def GetModelName(attr, extract=True):

   367

        """

   368

        Function that extracts a string from a tree node or not and check that

   369

        string extracted or given match the model

   370

        @param attr: tree node containing data to extract or data as a string

   371

        @param extract: attr is a tree node or not

   372

        @return: data as a string if matching

   373

        """

   374

        if extract:

   375

            value = GetAttributeValue(attr)

   376

        else:

   377

            value = attr

   378

        result = model.match(value)

   379

        if not result:

   380

            raise ValueError("\"%s\" isn't a valid %s!" % (value, type))

   381

        return value

   382

    return GetModelName

   383

   384

   385

def GenerateLimitExtraction(min=None, max=None, unbounded=True):

   386

    """

   387

    Function that generates an extraction function for integer defining min and

   388

    max of integer value

   389

    @param min: minimum limit value

   390

    @param max: maximum limit value

   391

    @param unbounded: value can be "unbounded" or not

   392

    @return: function generated

   393

    """

   394

    def GetLimit(attr, extract=True):

   395

        """

   396

        Function that extracts a string from a tree node or not and check that

   397

        string extracted or given is in a list of values

   398

        @param attr: tree node containing data to extract or data as a string

   399

        @param extract: attr is a tree node or not

   400

        @return: data as a string

   401

        """

   402

        if extract:

   403

            value = GetAttributeValue(attr)

   404

        else:

   405

            value = attr

   406

        if value == "unbounded":

   407

            if unbounded:

   408

                return value

   409

            else:

   410

                raise ValueError("Member limit can't be defined to \"unbounded\"!")

   411

        try:

   412

            limit = int(value)

   413

        except:

   414

            raise ValueError("\"%s\" isn't a valid value for this member limit!" % value)

   415

        if limit < 0:

   416

            raise ValueError("Member limit can't be negative!")

   417

        elif min is not None and limit < min:

   418

            raise ValueError("Member limit can't be lower than \"%d\"!" % min)

   419

        elif max is not None and limit > max:

   420

            raise ValueError("Member limit can't be upper than \"%d\"!" % max)

   421

        return limit

   422

    return GetLimit

   423

   424

   425

def GenerateEnumeratedExtraction(type, list):

   426

    """

   427

    Function that generates an extraction function for enumerated values

   428

    @param type: name of the data type

   429

    @param list: list of possible values

   430

    @return: function generated

   431

    """

   432

    def GetEnumerated(attr, extract=True):

   433

        """

   434

        Function that extracts a string from a tree node or not and check that

   435

        string extracted or given is in a list of values

   436

        @param attr: tree node containing data to extract or data as a string

   437

        @param extract: attr is a tree node or not

   438

        @return: data as a string

   439

        """

   440

        if extract:

   441

            value = GetAttributeValue(attr)

   442

        else:

   443

            value = attr

   444

        if value in list:

   445

            return value

   446

        else:

   447

            raise ValueError(

   448

                "\"%s\" isn't a valid value for %s!" % (value, type))

   449

    return GetEnumerated

   450

   451

   452

def GetNamespaces(attr, extract=True):

   453

    """

   454

    Function that extracts a list of namespaces from a tree node or a string

   455

    @param attr: tree node containing data to extract or data as a string

   456

    @param extract: attr is a tree node or not

   457

    @return: list of namespaces

   458

    """

   459

    if extract:

   460

        value = GetAttributeValue(attr)

   461

    else:

   462

        value = attr

   463

    if value == "":

   464

        return []

   465

    elif value == "##any" or value == "##other":

   466

        namespaces = [value]

   467

    else:

   468

        namespaces = []

   469

        for item in value.split(" "):

   470

            if item == "##targetNamespace" or item == "##local":

   471

                namespaces.append(item)

   472

            else:

   473

                result = URI_model.match(item)

   474

                if result is not None:

   475

                    namespaces.append(item)

   476

                else:

   477

                    raise ValueError("\"%s\" isn't a valid value for namespace!" % value)

   478

    return namespaces

   479

   480

   481

def GenerateGetList(type, list):

   482

    """

   483

    Function that generates an extraction function for a list of values

   484

    @param type: name of the data type

   485

    @param list: list of possible values

   486

    @return: function generated

   487

    """

   488

    def GetLists(attr, extract=True):

   489

        """

   490

        Function that extracts a list of values from a tree node or a string

   491

        @param attr: tree node containing data to extract or data as a string

   492

        @param extract: attr is a tree node or not

   493

        @return: list of values

   494

        """

   495

        if extract:

   496

            value = GetAttributeValue(attr)

   497

        else:

   498

            value = attr

   499

        if value == "":

   500

            return []

   501

        elif value == "#all":

   502

            return [value]

   503

        else:

   504

            values = []

   505

            for item in value.split(" "):

   506

                if item in list:

   507

                    values.append(item)

   508

                else:

   509

                    raise ValueError(

   510

                        "\"%s\" isn't a valid value for %s!" % (value, type))

   511

            return values

   512

    return GetLists

   513

   514

   515

def GenerateModelNameListExtraction(type, model):

   516

    """

   517

    Function that generates an extraction function for list of string matching

   518

    a model

   519

    @param type: name of the data type

   520

    @param model: model that list elements must match

   521

    @return: function generated

   522

    """