CodeFileTreeNode.py
author Laurent Bessard
Thu, 05 Dec 2013 18:08:31 +0100
changeset 1380 10ac2b18437b
parent 1332 ac7d39f4e376
child 1448 20ff66dcc31d
permissions -rw-r--r--
Fixed bug when defining variable type as explicit array in VariablePanel
import os, re, traceback

from copy import deepcopy
from lxml import etree
from xmlclass import GenerateParserFromXSDstring

from PLCControler import UndoBuffer
from ConfigTreeNode import XSDSchemaErrorMessage

CODEFILE_XSD = """<?xml version="1.0" encoding="ISO-8859-1" ?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            xmlns:xhtml="http://www.w3.org/1999/xhtml">
  <xsd:element name="%(codefile_name)s">
    <xsd:complexType>
      <xsd:sequence>
        %(includes_section)s
        <xsd:element name="variables">
          <xsd:complexType>
            <xsd:sequence>
              <xsd:element name="variable" minOccurs="0" maxOccurs="unbounded">
                <xsd:complexType>
                  <xsd:attribute name="name" type="xsd:string" use="required"/>
                  <xsd:attribute name="type" type="xsd:string" use="required"/>
                  <xsd:attribute name="class" use="optional">
                    <xsd:simpleType>
                      <xsd:restriction base="xsd:string">
                        <xsd:enumeration value="input"/>
                        <xsd:enumeration value="memory"/>
                        <xsd:enumeration value="output"/>
                      </xsd:restriction>
                    </xsd:simpleType>
                  </xsd:attribute>
                  <xsd:attribute name="initial" type="xsd:string" use="optional" default=""/>
                </xsd:complexType>
              </xsd:element>
            </xsd:sequence>
          </xsd:complexType>
        </xsd:element>
        %(sections)s
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>
  <xsd:complexType name="CodeText">
    <xsd:annotation>
      <xsd:documentation>Formatted text according to parts of XHTML 1.1</xsd:documentation>
    </xsd:annotation>
    <xsd:sequence>
      <xsd:any namespace="http://www.w3.org/1999/xhtml" processContents="lax"/>
    </xsd:sequence>
  </xsd:complexType>
</xsd:schema>"""

SECTION_TAG_ELEMENT = "<xsd:element name=\"%s\" type=\"CodeText\"/>"

class CodeFile:
    
    CODEFILE_NAME = "CodeFile"
    SECTIONS_NAMES = []
    
    def __init__(self):
        sections_str = {"codefile_name": self.CODEFILE_NAME}
        if "includes" in self.SECTIONS_NAMES:
            sections_str["includes_section"] = SECTION_TAG_ELEMENT % "includes"
        else:
            sections_str["includes_section"] = ""
        sections_str["sections"] = "\n".join(
            [SECTION_TAG_ELEMENT % name
             for name in self.SECTIONS_NAMES if name != "includes"])
        
        self.CodeFileParser = GenerateParserFromXSDstring(
            CODEFILE_XSD % sections_str)
        self.CodeFileVariables = etree.XPath("variables/variable")
        
        filepath = self.CodeFileName()
        
        if os.path.isfile(filepath):
            xmlfile = open(filepath, 'r')
            codefile_xml = xmlfile.read()
            xmlfile.close()
            
            codefile_xml = codefile_xml.replace(
                '<%s>' % self.CODEFILE_NAME, 
                '<%s xmlns:xhtml="http://www.w3.org/1999/xhtml">' % self.CODEFILE_NAME)
            for cre, repl in [
                (re.compile("(?<!<xhtml:p>)(?:<!\[CDATA\[)"), "<xhtml:p><![CDATA["),
                (re.compile("(?:]]>)(?!</xhtml:p>)"), "]]></xhtml:p>")]:
                codefile_xml = cre.sub(repl, codefile_xml)
            
            try:
                self.CodeFile, error = self.CodeFileParser.LoadXMLString(codefile_xml)
                if error is not None:
                    self.GetCTRoot().logger.write_warning(
                        XSDSchemaErrorMessage % ((self.CODEFILE_NAME,) + error))
                self.CreateCodeFileBuffer(True)
            except Exception, exc:
                self.GetCTRoot().logger.write_error(_("Couldn't load confnode parameters %s :\n %s") % (CTNName, unicode(exc)))
                self.GetCTRoot().logger.write_error(traceback.format_exc())
        else:
            self.CodeFile = self.CodeFileParser.CreateRoot()
            self.CreateCodeFileBuffer(False)
            self.OnCTNSave()

    def GetBaseTypes(self):
        return self.GetCTRoot().GetBaseTypes()

    def GetDataTypes(self, basetypes = False):
        return self.GetCTRoot().GetDataTypes(basetypes=basetypes)

    def GenerateNewName(self, format, start_idx):
        return self.GetCTRoot().GenerateNewName(
            None, None, format, start_idx,
            dict([(var.getname().upper(), True) 
                  for var in self.CodeFile.variables.getvariable()]))

    def SetVariables(self, variables):
        self.CodeFile.variables.setvariable([])
        for var in variables:
            variable = self.CodeFileParser.CreateElement("variable", "variables")
            variable.setname(var["Name"])
            variable.settype(var["Type"])
            variable.setinitial(var["Initial"])
            self.CodeFile.variables.appendvariable(variable)
    
    def GetVariables(self):
        datas = []
        for var in self.CodeFileVariables(self.CodeFile):
            datas.append({"Name" : var.getname(), 
                          "Type" : var.gettype(), 
                          "Initial" : var.getinitial()})
        return datas

    def SetTextParts(self, parts):
        for section in self.SECTIONS_NAMES:
            section_code = parts.get(section)
            if section_code is not None:
                getattr(self.CodeFile, section).setanyText(section_code)
    
    def GetTextParts(self):
        return dict([(section, getattr(self.CodeFile, section).getanyText())
                     for section in self.SECTIONS_NAMES])
            
    def CTNTestModified(self):
        return self.ChangesToSave or not self.CodeFileIsSaved()    

    def OnCTNSave(self, from_project_path=None):
        filepath = self.CodeFileName()
        
        xmlfile = open(filepath,"w")
        xmlfile.write(etree.tostring(
            self.CodeFile, 
            pretty_print=True, 
            xml_declaration=True, 
            encoding='utf-8'))
        xmlfile.close()
        
        self.MarkCodeFileAsSaved()
        return True

    def CTNGlobalInstances(self):
        current_location = self.GetCurrentLocation()
        return [(variable.getname(),
                 variable.gettype(),
                 variable.getinitial())
                for variable in self.CodeFileVariables(self.CodeFile)]

#-------------------------------------------------------------------------------
#                      Current Buffering Management Functions
#-------------------------------------------------------------------------------

    """
    Return a copy of the codefile model
    """
    def Copy(self, model):
        return deepcopy(model)

    def CreateCodeFileBuffer(self, saved):
        self.Buffering = False
        self.CodeFileBuffer = UndoBuffer(self.CodeFileParser.Dumps(self.CodeFile), saved)

    def BufferCodeFile(self):
        self.CodeFileBuffer.Buffering(self.CodeFileParser.Dumps(self.CodeFile))
    
    def StartBuffering(self):
        self.Buffering = True
        
    def EndBuffering(self):
        if self.Buffering:
            self.CodeFileBuffer.Buffering(self.CodeFileParser.Dumps(self.CodeFile))
            self.Buffering = False
    
    def MarkCodeFileAsSaved(self):
        self.EndBuffering()
        self.CodeFileBuffer.CurrentSaved()
    
    def CodeFileIsSaved(self):
        return self.CodeFileBuffer.IsCurrentSaved() and not self.Buffering
        
    def LoadPrevious(self):
        self.EndBuffering()
        self.CodeFile = self.CodeFileParser.Loads(self.CodeFileBuffer.Previous())
    
    def LoadNext(self):
        self.CodeFile = self.CodeFileParser.Loads(self.CodeFileBuffer.Next())
    
    def GetBufferState(self):
        first = self.CodeFileBuffer.IsFirst() and not self.Buffering
        last = self.CodeFileBuffer.IsLast()
        return not first, not last