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#!/usr/bin/env python

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# -*- coding: utf-8 -*-

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#This file is part of PLCOpenEditor, a library implementing an IEC 61131-3 editor

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#based on the plcopen standard. 

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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 library is free software; you can redistribute it and/or

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#modify it under the terms of the GNU General Public

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#License as published by the Free Software Foundation; either

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#version 2.1 of the License, or (at your option) any later version.

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#

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#This library 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 GNU

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#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

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#License along with this library; if not, write to the Free Software

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#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

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import wx

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import wx.stc

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from types import *

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import re

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from graphics.GraphicCommons import ERROR_HIGHLIGHT, SEARCH_RESULT_HIGHLIGHT, REFRESH_HIGHLIGHT_PERIOD

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from plcopen.structures import ST_BLOCK_START_KEYWORDS, ST_BLOCK_END_KEYWORDS, IEC_BLOCK_START_KEYWORDS, IEC_BLOCK_END_KEYWORDS

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from controls import EditorPanel

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

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#                         Textual programs Viewer class

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

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NEWLINE = "\n"

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NUMBERS = [str(i) for i in xrange(10)]

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LETTERS = ['_']

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for i in xrange(26):

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    LETTERS.append(chr(ord('a') + i))

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    LETTERS.append(chr(ord('A') + i))

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[STC_PLC_WORD, STC_PLC_COMMENT, STC_PLC_NUMBER, STC_PLC_STRING, 

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 STC_PLC_VARIABLE, STC_PLC_PARAMETER, STC_PLC_FUNCTION, STC_PLC_JUMP, 

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 STC_PLC_ERROR, STC_PLC_SEARCH_RESULT] = range(10)

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[SPACE, WORD, NUMBER, STRING, WSTRING, COMMENT] = range(6)

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[ID_TEXTVIEWER, ID_TEXTVIEWERTEXTCTRL,

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] = [wx.NewId() for _init_ctrls in range(2)]

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if wx.Platform == '__WXMSW__':

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    faces = { 'times': 'Times New Roman',

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              'mono' : 'Courier New',

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              'helv' : 'Arial',

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              'other': 'Comic Sans MS',

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              'size' : 10,

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             }

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else:

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    faces = { 'times': 'Times',

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              'mono' : 'Courier',

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              'helv' : 'Helvetica',

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              'other': 'new century schoolbook',

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              'size' : 12,

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             }

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re_texts = {}

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re_texts["letter"] = "[A-Za-z]"

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re_texts["digit"] = "[0-9]"

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re_texts["identifier"] = "((?:%(letter)s|(?:_(?:%(letter)s|%(digit)s)))(?:_?(?:%(letter)s|%(digit)s))*)"%re_texts

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IDENTIFIER_MODEL = re.compile(re_texts["identifier"])

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LABEL_MODEL = re.compile("[ \t\n]%(identifier)s:[ \t\n]"%re_texts)

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EXTENSIBLE_PARAMETER = re.compile("IN[1-9][0-9]*$")

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HIGHLIGHT_TYPES = {

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    ERROR_HIGHLIGHT: STC_PLC_ERROR,

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    SEARCH_RESULT_HIGHLIGHT: STC_PLC_SEARCH_RESULT,

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}

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def GetCursorPos(old, new):

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    old_length = len(old)

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    new_length = len(new)

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    common_length = min(old_length, new_length)

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    i = 0

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    for i in xrange(common_length):

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        if old[i] != new[i]:

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            break

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    if old_length < new_length:

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        if common_length > 0 and old[i] != new[i]:

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            return i + new_length - old_length

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        else:

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            return i + new_length - old_length + 1

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    elif old_length > new_length or i < min(old_length, new_length) - 1:

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        if common_length > 0 and old[i] != new[i]:

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            return i

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        else:

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            return i + 1

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    else:

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        return None

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   103

def LineStartswith(line, symbols):

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    return reduce(lambda x, y: x or y, map(lambda x: line.startswith(x), symbols), False)

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class TextViewer(EditorPanel):

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    ID = ID_TEXTVIEWER

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    if wx.VERSION < (2, 6, 0):

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        def Bind(self, event, function, id = None):

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            if id is not None:

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                event(self, id, function)

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            else:

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                event(self, function)

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    def _init_Editor(self, prnt):

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        self.Editor = wx.stc.StyledTextCtrl(id=ID_TEXTVIEWERTEXTCTRL, 

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                parent=prnt, name="TextViewer", size=wx.Size(0, 0), style=0)

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        self.Editor.CmdKeyAssign(ord('+'), wx.stc.STC_SCMOD_CTRL, wx.stc.STC_CMD_ZOOMIN)

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        self.Editor.CmdKeyAssign(ord('-'), wx.stc.STC_SCMOD_CTRL, wx.stc.STC_CMD_ZOOMOUT)

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        self.Editor.SetViewWhiteSpace(False)

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   126

        self.Editor.SetLexer(wx.stc.STC_LEX_CONTAINER)

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        # Global default styles for all languages

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        self.Editor.StyleSetSpec(wx.stc.STC_STYLE_DEFAULT, "face:%(mono)s,size:%(size)d" % faces)

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        self.Editor.StyleClearAll()  # Reset all to be like the default

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        self.Editor.StyleSetSpec(wx.stc.STC_STYLE_LINENUMBER,  "back:#C0C0C0,size:%(size)d" % faces)

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        self.Editor.SetSelBackground(1, "#E0E0E0")

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        # Highlighting styles

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        self.Editor.StyleSetSpec(STC_PLC_WORD, "fore:#00007F,bold,size:%(size)d" % faces)

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        self.Editor.StyleSetSpec(STC_PLC_VARIABLE, "fore:#7F0000,size:%(size)d" % faces)

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        self.Editor.StyleSetSpec(STC_PLC_PARAMETER, "fore:#7F007F,size:%(size)d" % faces)

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        self.Editor.StyleSetSpec(STC_PLC_FUNCTION, "fore:#7F7F00,size:%(size)d" % faces)

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        self.Editor.StyleSetSpec(STC_PLC_COMMENT, "fore:#7F7F7F,size:%(size)d" % faces)

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        self.Editor.StyleSetSpec(STC_PLC_NUMBER, "fore:#007F7F,size:%(size)d" % faces)

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        self.Editor.StyleSetSpec(STC_PLC_STRING, "fore:#007F00,size:%(size)d" % faces)

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        self.Editor.StyleSetSpec(STC_PLC_JUMP, "fore:#FF7FFF,size:%(size)d" % faces)

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        self.Editor.StyleSetSpec(STC_PLC_ERROR, "fore:#FF0000,back:#FFFF00,size:%(size)d" % faces)

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        self.Editor.StyleSetSpec(STC_PLC_SEARCH_RESULT, "fore:#FFFFFF,back:#FFA500,size:%(size)d" % faces)

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        # Indicators styles

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        self.Editor.IndicatorSetStyle(0, wx.stc.STC_INDIC_SQUIGGLE)

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        if self.ParentWindow is not None and self.Controler is not None:

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            self.Editor.IndicatorSetForeground(0, wx.RED)

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        else:

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            self.Editor.IndicatorSetForeground(0, wx.WHITE)

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        # Line numbers in the margin

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        self.Editor.SetMarginType(1, wx.stc.STC_MARGIN_NUMBER)

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        self.Editor.SetMarginWidth(1, 50)

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   158

        # Folding

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        self.Editor.MarkerDefine(wx.stc.STC_MARKNUM_FOLDEROPEN,    wx.stc.STC_MARK_BOXMINUS,          "white", "#808080")

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        self.Editor.MarkerDefine(wx.stc.STC_MARKNUM_FOLDER,        wx.stc.STC_MARK_BOXPLUS,           "white", "#808080")

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        self.Editor.MarkerDefine(wx.stc.STC_MARKNUM_FOLDERSUB,     wx.stc.STC_MARK_VLINE,             "white", "#808080")

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        self.Editor.MarkerDefine(wx.stc.STC_MARKNUM_FOLDERTAIL,    wx.stc.STC_MARK_LCORNER,           "white", "#808080")

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        self.Editor.MarkerDefine(wx.stc.STC_MARKNUM_FOLDEREND,     wx.stc.STC_MARK_BOXPLUSCONNECTED,  "white", "#808080")

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        self.Editor.MarkerDefine(wx.stc.STC_MARKNUM_FOLDEROPENMID, wx.stc.STC_MARK_BOXMINUSCONNECTED, "white", "#808080")

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        self.Editor.MarkerDefine(wx.stc.STC_MARKNUM_FOLDERMIDTAIL, wx.stc.STC_MARK_TCORNER,           "white", "#808080")

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   167

        # Indentation size

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        self.Editor.SetTabWidth(2)

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        self.Editor.SetUseTabs(0)

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   171

        self.Editor.SetModEventMask(wx.stc.STC_MOD_BEFOREINSERT|

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                                    wx.stc.STC_MOD_BEFOREDELETE|

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                                    wx.stc.STC_PERFORMED_USER)

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        self.Bind(wx.stc.EVT_STC_STYLENEEDED, self.OnStyleNeeded, id=ID_TEXTVIEWERTEXTCTRL)

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        self.Editor.Bind(wx.stc.EVT_STC_MARGINCLICK, self.OnMarginClick)

   177

        self.Editor.Bind(wx.EVT_KEY_DOWN, self.OnKeyDown)

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        if self.Controler is not None:

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            self.Editor.Bind(wx.EVT_KILL_FOCUS, self.OnKillFocus)

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            self.Bind(wx.stc.EVT_STC_DO_DROP, self.OnDoDrop, id=ID_TEXTVIEWERTEXTCTRL)

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            self.Bind(wx.stc.EVT_STC_MODIFIED, self.OnModification, id=ID_TEXTVIEWERTEXTCTRL)

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   183

    def __init__(self, parent, tagname, window, controler, debug = False, instancepath = ""):

   184

        if tagname != "" and controler is not None:

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            self.VARIABLE_PANEL_TYPE = controler.GetPouType(tagname.split("::")[1])

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   187

        EditorPanel.__init__(self, parent, tagname, window, controler)

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   189

        self.Keywords = []

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        self.Variables = {}

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        self.Functions = {}

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        self.TypeNames = []

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        self.Jumps = []

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        self.EnumeratedValues = []

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        self.DisableEvents = True

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        self.TextSyntax = None

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        self.CurrentAction = None

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        self.Highlights = []

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        self.Debug = debug

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        self.InstancePath = instancepath

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        self.ContextStack = []

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        self.CallStack = []

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   204

        self.RefreshHighlightsTimer = wx.Timer(self, -1)

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        self.Bind(wx.EVT_TIMER, self.OnRefreshHighlightsTimer, self.RefreshHighlightsTimer)

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   207

    def __del__(self):

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        self.RefreshHighlightsTimer.Stop()

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   210

    def GetTitle(self):

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        if self.Debug or self.TagName == "":

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            if len(self.InstancePath) > 15:

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                return "..." + self.InstancePath[-12:]

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            return self.InstancePath

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        return EditorPanel.GetTitle(self)

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   217

    def GetInstancePath(self):

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        return self.InstancePath

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   220

    def IsViewing(self, tagname):

   221

        if self.Debug or self.TagName == "":

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            return self.InstancePath == tagname

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        else:

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            return self.TagName == tagname

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   226

    def IsDebugging(self):

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        return self.Debug

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   229

    def GetText(self):

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        return self.Editor.GetText()

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   232

    def SetText(self, text):

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        self.Editor.SetText(text)

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   235

    def SelectAll(self):

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        self.Editor.SelectAll()

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   238

    def Colourise(self, start, end):

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        self.Editor.Colourise(start, end)

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   241

    def StartStyling(self, pos, mask):

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        self.Editor.StartStyling(pos, mask)

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   244

    def SetStyling(self, length, style):

   245

        self.Editor.SetStyling(length, style)

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   247

    def GetCurrentPos(self):

   248

        return self.Editor.GetCurrentPos()

   249

   250

    def OnModification(self, event):

   251

        if not self.DisableEvents:

   252

            mod_type = event.GetModificationType()

   253

            if mod_type&wx.stc.STC_MOD_BEFOREINSERT:

   254

                if self.CurrentAction == None:

   255

                    self.StartBuffering()

   256

                elif self.CurrentAction[0] != "Add" or self.CurrentAction[1] != event.GetPosition() - 1:

   257

                    self.Controler.EndBuffering()

   258

                    self.StartBuffering()

   259

                self.CurrentAction = ("Add", event.GetPosition())

   260

                wx.CallAfter(self.RefreshModel)

   261

            elif mod_type&wx.stc.STC_MOD_BEFOREDELETE:

   262

                if self.CurrentAction == None:

   263

                    self.StartBuffering()

   264

                elif self.CurrentAction[0] != "Delete" or self.CurrentAction[1] != event.GetPosition() + 1:

   265

                    self.Controler.EndBuffering()

   266

                    self.StartBuffering()

   267

                self.CurrentAction = ("Delete", event.GetPosition())

   268

                wx.CallAfter(self.RefreshModel)

   269

        event.Skip()

   270

   271

    def OnDoDrop(self, event):

   272

        try:

   273

            values = eval(event.GetDragText())

   274

        except:

   275

            values = event.GetDragText()

   276

        if isinstance(values, tuple):

   277

            message = None

   278

            if values[1] in ["program", "debug"]:

   279

                event.SetDragText("")

   280

            elif values[1] in ["functionBlock", "function"]:

   281

                blockname = values[2]

   282

                if len(values) > 3:

   283

                    blockinputs = values[3]

   284

                else:

   285

                    blockinputs = None

   286

                if values[1] != "function": 

   287

                    if  blockname == "":

   288

                        dialog = wx.TextEntryDialog(self.ParentWindow, "Block name", "Please enter a block name", "", wx.OK|wx.CANCEL|wx.CENTRE)

   289

                        if dialog.ShowModal() == wx.ID_OK:

   290

                            blockname = dialog.GetValue()

   291

                        else:

   292

                            return

   293

                        dialog.Destroy()

   294

                    if blockname.upper() in [name.upper() for name in self.Controler.GetProjectPouNames(self.Debug)]:

   295

                        message = _("\"%s\" pou already exists!")%blockname

   296

                    elif blockname.upper() in [name.upper() for name in self.Controler.GetEditedElementVariables(self.TagName, self.Debug)]:

   297

                        message = _("\"%s\" element for this pou already exists!")%blockname

   298

                    else:

   299

                        self.Controler.AddEditedElementPouVar(self.TagName, values[0], blockname)

   300

                        self.RefreshVariablePanel()

   301

                        self.RefreshVariableTree()

   302

                blockinfo = self.Controler.GetBlockType(values[0], blockinputs, self.Debug)

   303

                hint = ',\n    '.join(

   304

                            [ " " + fctdecl[0]+" := (*"+fctdecl[1]+"*)" for fctdecl in blockinfo["inputs"]] +

   305

                            [ " " + fctdecl[0]+" => (*"+fctdecl[1]+"*)" for fctdecl in blockinfo["outputs"]])

   306

                event.SetDragText(blockname+"(\n    "+hint+")")

   307

            elif values[1] == "location":

   308

                pou_name, pou_type = self.Controler.GetEditedElementType(self.TagName, self.Debug)

   309

                if len(values) > 2 and pou_type == "program":

   310

                    var_name = values[3]

   311

                    if var_name.upper() in [name.upper() for name in self.Controler.GetProjectPouNames(self.Debug)]:

   312

                        message = _("\"%s\" pou already exists!")%var_name

   313

                    elif var_name.upper() in [name.upper() for name in self.Controler.GetEditedElementVariables(self.TagName, self.Debug)]:

   314

                        message = _("\"%s\" element for this pou already exists!")%var_name

   315

                    else:

   316

                        if values[2] is not None:

   317

                            var_type = values[2]

   318

                        else:

   319

                            var_type = LOCATIONDATATYPES.get(values[0][2], ["BOOL"])[0]

   320

                        self.Controler.AddEditedElementPouVar(self.TagName, var_type, var_name, values[0], values[4])

   321

                        self.RefreshVariablePanel()

   322

                        self.RefreshVariableTree()

   323

                        event.SetDragText(var_name)

   324

                else:

   325

                    event.SetDragText("")

   326

            elif values[3] == self.TagName:

   327

                self.ResetBuffer()

   328

                event.SetDragText(values[0])

   329

                wx.CallAfter(self.RefreshModel)

   330

            else:

   331

                message = _("Variable don't belong to this POU!")

   332

            if message is not None:

   333

                dialog = wx.MessageDialog(self, message, _("Error"), wx.OK|wx.ICON_ERROR)

   334

                dialog.ShowModal()

   335

                dialog.Destroy()

   336

                event.SetDragText("")

   337

        event.Skip()

   338

   339

    def SetTextSyntax(self, syntax):

   340

        self.TextSyntax = syntax

   341

        if syntax in ["ST", "ALL"]:

   342

            self.Editor.SetMarginType(2, wx.stc.STC_MARGIN_SYMBOL)

   343

            self.Editor.SetMarginMask(2, wx.stc.STC_MASK_FOLDERS)

   344

            self.Editor.SetMarginSensitive(2, 1)

   345

            self.Editor.SetMarginWidth(2, 12)

   346

            if syntax == "ST":

   347

                self.BlockStartKeywords = ST_BLOCK_START_KEYWORDS

   348

                self.BlockEndKeywords = ST_BLOCK_START_KEYWORDS

   349

            else:

   350

                self.BlockStartKeywords = IEC_BLOCK_START_KEYWORDS

   351

                self.BlockEndKeywords = IEC_BLOCK_START_KEYWORDS

   352

        else:

   353

            self.BlockStartKeywords = []

   354

            self.BlockEndKeywords = []

   355

   356

    def SetKeywords(self, keywords):

   357

        self.Keywords = [keyword.upper() for keyword in keywords]

   358

        self.Colourise(0, -1)

   359

   360

    def RefreshJumpList(self):

   361

        if self.TextSyntax != "IL":

   362

            self.Jumps = [jump.upper() for jump in LABEL_MODEL.findall(self.GetText())]

   363

            self.Colourise(0, -1)

   364

   365

    # Buffer the last model state

   366

    def RefreshBuffer(self):

   367

        self.Controler.BufferProject()

   368

        if self.ParentWindow:

   369

            self.ParentWindow.RefreshTitle()

   370

            self.ParentWindow.RefreshFileMenu()

   371

            self.ParentWindow.RefreshEditMenu()

   372

   373

    def StartBuffering(self):

   374

        self.Controler.StartBuffering()

   375

        if self.ParentWindow:

   376

            self.ParentWindow.RefreshTitle()

   377

            self.ParentWindow.RefreshFileMenu()

   378

            self.ParentWindow.RefreshEditMenu()

   379

   380

    def ResetBuffer(self):

   381

        if self.CurrentAction != None:

   382

            self.Controler.EndBuffering()

   383

            self.CurrentAction = None

   384

   385

    def GetBufferState(self):

   386

        if not self.Debug and self.TextSyntax != "ALL":

   387

            return self.Controler.GetBufferState()

   388

        return False, False

   389

   390

    def Undo(self):

   391

        if not self.Debug and self.TextSyntax != "ALL":

   392

            self.Controler.LoadPrevious()

   393

            self.ParentWindow.CloseTabsWithoutModel()

   394

            self.ParentWindow.RefreshEditor()

   395

   396

    def Redo(self):

   397

        if not self.Debug and self.TextSyntax != "ALL":

   398

            self.Controler.LoadNext()

   399

            self.ParentWindow.CloseTabsWithoutModel()

   400

            self.ParentWindow.RefreshEditor()

   401

   402

    def HasNoModel(self):

   403

        if not self.Debug and self.TextSyntax != "ALL":

   404

            return self.Controler.GetEditedElement(self.TagName) is None

   405

        return False

   406

   407

    def RefreshView(self, variablepanel=True):

   408

        EditorPanel.RefreshView(self, variablepanel)

   409

   410

        if self.Controler is not None:

   411

            self.ResetBuffer()

   412

            self.DisableEvents = True

   413

            old_cursor_pos = self.GetCurrentPos()

   414

            old_text = self.GetText()

   415

            new_text = self.Controler.GetEditedElementText(self.TagName, self.Debug)

   416

            self.SetText(new_text)

   417

            new_cursor_pos = GetCursorPos(old_text, new_text)

   418

            if new_cursor_pos != None:

   419

                self.Editor.GotoPos(new_cursor_pos)

   420

            else:

   421

                self.Editor.GotoPos(old_cursor_pos)

   422

            self.Editor.ScrollToColumn(0)

   423

            self.RefreshJumpList()

   424

            self.Editor.EmptyUndoBuffer()

   425

            self.DisableEvents = False

   426

   427

            self.RefreshVariableTree()

   428

   429

            self.TypeNames = [typename.upper() for typename in self.Controler.GetDataTypes(self.TagName, True, self.Debug)]

   430

            self.EnumeratedValues = [value.upper() for value in self.Controler.GetEnumeratedDataValues()]

   431

   432

            self.Functions = {}

   433

            for category in self.Controler.GetBlockTypes(self.TagName, self.Debug):

   434

                for blocktype in category["list"]:

   435

                    blockname = blocktype["name"].upper()

   436

                    if blocktype["type"] == "function" and blockname not in self.Keywords and blockname not in self.Variables.keys():

   437

                        interface = dict([(name, {}) for name, type, modifier in blocktype["inputs"] + blocktype["outputs"] if name != ''])

   438

                        for param in ["EN", "ENO"]:

   439

                            if not interface.has_key(param):

   440

                                interface[param] = {}

   441

                        if self.Functions.has_key(blockname):

   442

                            self.Functions[blockname]["interface"].update(interface)

   443

                            self.Functions[blockname]["extensible"] |= blocktype["extensible"]

   444

                        else:

   445

                            self.Functions[blockname] = {"interface": interface,

   446

                                                         "extensible": blocktype["extensible"]}

   447

   448

        self.Colourise(0, -1)

   449

   450

    def RefreshVariableTree(self):

   451

        words = self.TagName.split("::")

   452

        self.Variables = self.GenerateVariableTree([(variable["Name"], variable["Type"], variable["Tree"]) for variable in self.Controler.GetEditedElementInterfaceVars(self.TagName, self.Debug)])

   453

        if self.Controler.GetEditedElementType(self.TagName, self.Debug)[1] == "function" or words[0] == "T" and self.TextSyntax == "IL":

   454

            return_type = self.Controler.GetEditedElementInterfaceReturnType(self.TagName, self.Debug)

   455

            if return_type is not None:

   456

                var_tree, var_dimension = self.Controler.GenerateVarTree(return_type, self.Debug)

   457

                self.Variables[words[-1].upper()] = self.GenerateVariableTree(var_tree)

   458

            else:

   459

                self.Variables[words[-1].upper()] = {}

   460

   461

    def GenerateVariableTree(self, list):

   462

        tree = {}

   463

        for var_name, var_type, (var_tree, var_dimension) in list:

   464

            tree[var_name.upper()] = self.GenerateVariableTree(var_tree)

   465

        return tree

   466

   467

    def IsValidVariable(self, name, context):

   468

        return context is not None and context.get(name, None) is not None

   469

   470

    def IsCallParameter(self, name, call):

   471

        if call is not None:

   472

            return (call["interface"].get(name.upper(), None) is not None or 

   473

                    call["extensible"] and EXTENSIBLE_PARAMETER.match(name.upper()) is not None)

   474

        return False

   475

   476

    def RefreshLineFolding(self, line_number):

   477

        if self.TextSyntax in ["ST", "ALL"]:

   478

            level = wx.stc.STC_FOLDLEVELBASE + self.Editor.GetLineIndentation(line_number)

   479

            line = self.Editor.GetLine(line_number).strip()

   480

            if line == "":

   481

                if line_number > 0:

   482

                    if LineStartswith(self.Editor.GetLine(line_number - 1).strip(), self.BlockEndKeywords):

   483

                        level = self.Editor.GetFoldLevel(self.Editor.GetFoldParent(line_number - 1)) & wx.stc.STC_FOLDLEVELNUMBERMASK

   484

                    else:

   485

                        level = self.Editor.GetFoldLevel(line_number - 1) & wx.stc.STC_FOLDLEVELNUMBERMASK

   486

                if level != wx.stc.STC_FOLDLEVELBASE:

   487

                    level |=  wx.stc.STC_FOLDLEVELWHITEFLAG 

   488

            elif LineStartswith(line, self.BlockStartKeywords):

   489

                level |= wx.stc.STC_FOLDLEVELHEADERFLAG

   490

            elif LineStartswith(line, self.BlockEndKeywords):

   491

                if LineStartswith(self.Editor.GetLine(line_number - 1).strip(), self.BlockEndKeywords):

   492

                    level = self.Editor.GetFoldLevel(self.Editor.GetFoldParent(line_number - 1)) & wx.stc.STC_FOLDLEVELNUMBERMASK

   493

                else:

   494

                    level = self.Editor.GetFoldLevel(line_number - 1) & wx.stc.STC_FOLDLEVELNUMBERMASK