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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 re

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from types import *

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import wx

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import wx.stc

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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, LOCATIONDATATYPES

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from EditorPanel import EditorPanel

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from controls.CustomStyledTextCtrl import CustomStyledTextCtrl, faces, GetCursorPos, NAVIGATION_KEYS

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

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#                         Textual programs Viewer class

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

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    40

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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, 

    49

 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, PRAGMA, DPRAGMA] = range(8)

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[ID_TEXTVIEWER, ID_TEXTVIEWERTEXTCTRL,

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

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    56

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 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 = CustomStyledTextCtrl(id=ID_TEXTVIEWERTEXTCTRL, 

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

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        self.Editor.ParentWindow = self

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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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        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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   121

        # 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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   125

        # 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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        # Indentation size

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        self.Editor.SetTabWidth(2)

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        self.Editor.SetUseTabs(0)

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   138

        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)

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        self.Editor.Bind(wx.stc.EVT_STC_UPDATEUI, self.OnUpdateUI)

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        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)

   148

            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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   151

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

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

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

   154

   155

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

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   157

        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

   166

   167

        self.InstancePath = instancepath

   168

        self.ContextStack = []

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        self.CallStack = []

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   171

        self.ResetSearchResults()

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   173

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

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

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   176

    def __del__(self):

   177

        self.RefreshHighlightsTimer.Stop()

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   179

    def GetTitle(self):

   180

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

   181

            if len(self.InstancePath) > 15:

   182

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

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            return self.InstancePath

   184

        return EditorPanel.GetTitle(self)

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   186

    def GetInstancePath(self):

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        return self.InstancePath

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   189

    def IsViewing(self, tagname):

   190

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

   191

            return self.InstancePath == tagname

   192

        else:

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            return self.TagName == tagname

   194

   195

    def GetText(self):

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        return self.Editor.GetText()

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   198

    def SetText(self, text):

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        self.Editor.SetText(text)

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   201

    def SelectAll(self):

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        self.Editor.SelectAll()

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   204

    def Colourise(self, start, end):

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        self.Editor.Colourise(start, end)

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   207

    def StartStyling(self, pos, mask):

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        self.Editor.StartStyling(pos, mask)

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   210

    def SetStyling(self, length, style):

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        self.Editor.SetStyling(length, style)

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   213

    def GetCurrentPos(self):

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        return self.Editor.GetCurrentPos()

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   216

    def ResetSearchResults(self):

   217

        self.Highlights = []

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        self.SearchParams = None

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        self.SearchResults = None

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        self.CurrentFindHighlight = None

   221

   222

    def OnModification(self, event):

   223

        if not self.DisableEvents:

   224

            mod_type = event.GetModificationType()

   225

            if mod_type&wx.stc.STC_MOD_BEFOREINSERT:

   226

                if self.CurrentAction == None:

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                    self.StartBuffering()

   228

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

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                    self.Controler.EndBuffering()

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                    self.StartBuffering()

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

   232

                wx.CallAfter(self.RefreshModel)

   233

            elif mod_type&wx.stc.STC_MOD_BEFOREDELETE:

   234

                if self.CurrentAction == None:

   235

                    self.StartBuffering()

   236

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

   237

                    self.Controler.EndBuffering()

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                    self.StartBuffering()

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

   240

                wx.CallAfter(self.RefreshModel)

   241

        event.Skip()

   242

   243

    def OnDoDrop(self, event):

   244

        try:

   245

            values = eval(event.GetDragText())

   246

        except:

   247

            values = event.GetDragText()

   248

        if isinstance(values, tuple):

   249

            message = None

   250

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

   251

                event.SetDragText("")

   252

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

   253

                blocktype = values[0]

   254

                blockname = values[2]

   255

                if len(values) > 3:

   256

                    blockinputs = values[3]

   257

                else:

   258

                    blockinputs = None

   259

                if values[1] != "function": 

   260

                    if blockname == "":

   261

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

   262

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

   263

                            blockname = dialog.GetValue()

   264

                        else:

   265

                            return

   266

                        dialog.Destroy()

   267

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

   268

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

   269

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

   270

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

   271

                    else:

   272

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

   273

                        self.RefreshVariablePanel()

   274

                        self.RefreshVariableTree()

   275

                blockinfo = self.Controler.GetBlockType(blocktype, blockinputs, self.Debug)

   276

                hint = ',\n    '.join(

   277

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

   278

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

   279

                if values[1] == "function":

   280

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

   281

                else:

   282

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

   283

            elif values[1] == "location":

   284

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

   285

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

   286

                    var_name = values[3]

   287

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

   288

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

   289

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

   290

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

   291

                    else:

   292

                        location = values[0]

   293

                        if not location.startswith("%"):

   294

                            dialog = wx.SingleChoiceDialog(self.ParentWindow, 

   295

                                  _("Select a variable class:"), _("Variable class"), 

   296

                                  ["Input", "Output", "Memory"], 

   297

                                  wx.DEFAULT_DIALOG_STYLE|wx.OK|wx.CANCEL)

   298

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

   299

                                selected = dialog.GetSelection()

   300

                            else:

   301

                                selected = None

   302

                            dialog.Destroy()

   303

                            if selected is None:

   304

                                event.SetDragText("")

   305

                                return

   306

                            if selected == 0:

   307

                                location = "%I" + location

   308

                            elif selected == 1:

   309

                                location = "%Q" + location

   310

                            else:

   311

                                location = "%M" + location

   312

                        if values[2] is not None:

   313

                            var_type = values[2]

   314

                        else:

   315

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

   319

                        self.RefreshVariablePanel()

   320

                        self.RefreshVariableTree()

   321

                        event.SetDragText(var_name)

   322

                else:

   323

                    event.SetDragText("")

   324

            elif values[1] == "Global":

   325

                var_name = values[0]

   326

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

   327

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

   328

                else:

   329

                    if not var_name.upper() in [name.upper() for name in self.Controler.GetEditedElementVariables(self.TagName, self.Debug)]:

   330

                        self.Controler.AddEditedElementPouExternalVar(self.TagName, values[2], var_name)

   331

                        self.RefreshVariablePanel()

   332

                        self.RefreshVariableTree()

   333

                    event.SetDragText(var_name)

   334

            elif values[1] == "Constant":

   335

                event.SetDragText(values[0])

   336

            elif values[3] == self.TagName:

   337

                self.ResetBuffer()

   338

                event.SetDragText(values[0])

   339

                wx.CallAfter(self.RefreshModel)

   340

            else:

   341

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

   342

            if message is not None:

   343

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

   344

                dialog.ShowModal()

   345

                dialog.Destroy()

   346

                event.SetDragText("")

   347

        event.Skip()

   348

   349

    def SetTextSyntax(self, syntax):

   350

        self.TextSyntax = syntax

   351

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

   352

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

   353

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

   354

            self.Editor.SetMarginSensitive(2, 1)

   355

            self.Editor.SetMarginWidth(2, 12)

   356

            if syntax == "ST":

   357

                self.BlockStartKeywords = ST_BLOCK_START_KEYWORDS

   358

                self.BlockEndKeywords = ST_BLOCK_START_KEYWORDS

   359

            else:

   360

                self.BlockStartKeywords = IEC_BLOCK_START_KEYWORDS

   361

                self.BlockEndKeywords = IEC_BLOCK_START_KEYWORDS

   362

        else:

   363

            self.BlockStartKeywords = []

   364

            self.BlockEndKeywords = []

   365

   366

    def SetKeywords(self, keywords):

   367

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

   368

        self.Colourise(0, -1)

   369

   370

    def RefreshJumpList(self):

   371

        if self.TextSyntax != "IL":

   372

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

   373

            self.Colourise(0, -1)

   374

   375

    # Buffer the last model state

   376

    def RefreshBuffer(self):

   377

        self.Controler.BufferProject()

   378

        if self.ParentWindow:

   379

            self.ParentWindow.RefreshTitle()

   380

            self.ParentWindow.RefreshFileMenu()

   381

            self.ParentWindow.RefreshEditMenu()

   382

   383

    def StartBuffering(self):

   384

        self.Controler.StartBuffering()

   385

        if self.ParentWindow:

   386

            self.ParentWindow.RefreshTitle()

   387

            self.ParentWindow.RefreshFileMenu()

   388

            self.ParentWindow.RefreshEditMenu()

   389

   390

    def ResetBuffer(self):

   391

        if self.CurrentAction != None:

   392

            self.Controler.EndBuffering()

   393

            self.CurrentAction = None

   394

   395

    def GetBufferState(self):

   396

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

   397

            return self.Controler.GetBufferState()

   398

        return False, False

   399

   400

    def Undo(self):

   401

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

   402

            self.Controler.LoadPrevious()

   403

            self.ParentWindow.CloseTabsWithoutModel()

   404

   405

    def Redo(self):

   406

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

   407

            self.Controler.LoadNext()

   408

            self.ParentWindow.CloseTabsWithoutModel()

   409

   410

    def HasNoModel(self):

   411

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

   412

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

   413

        return False

   414

   415

    def RefreshView(self, variablepanel=True):

   416

        EditorPanel.RefreshView(self, variablepanel)

   417

   418

        if self.Controler is not None:

   419

            self.ResetBuffer()

   420

            self.DisableEvents = True

   421

            old_cursor_pos = self.GetCurrentPos()

   422

            line = self.Editor.GetFirstVisibleLine()

   423

            column = self.Editor.GetXOffset()

   424

            old_text = self.GetText()

   425

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

   426

            if old_text != new_text:

   427

                self.SetText(new_text)

   428

                new_cursor_pos = GetCursorPos(old_text, new_text)

   429

                self.Editor.LineScroll(column, line)

   430

                if new_cursor_pos != None:

   431

                    self.Editor.GotoPos(new_cursor_pos)

   432

                else:

   433

                    self.Editor.GotoPos(old_cursor_pos)

   434

                self.RefreshJumpList()

   435

                self.Editor.EmptyUndoBuffer()

   436

            self.DisableEvents = False

   437

   438

            self.RefreshVariableTree()

   439

   440

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

   441

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

   442

   443

            self.Functions = {}

   444

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

   445

                for blocktype in category["list"]:

   446

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

   447

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

   448

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

   449

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

   450

                            if not interface.has_key(param):

   451

                                interface[param] = {}

   452

                        if self.Functions.has_key(blockname):

   453

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

   454

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

   455

                        else:

   456

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

   457

                                                         "extensible": blocktype["extensible"]}

   458

   459

        self.Colourise(0, -1)

   460

   461

    def RefreshVariableTree(self):

   462

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

   463

        self.Variables = self.GenerateVariableTree(

   464

            [(variable.Name, variable.Type, variable.Tree) 

   465

             for variable in self.Controler.GetEditedElementInterfaceVars(

   466

                self.TagName, True, self.Debug)])

   467

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

   468

            return_type, (var_tree, var_dimension) = self.Controler.GetEditedElementInterfaceReturnType(self.TagName, True, self.Debug)

   469

            if return_type is not None:

   470

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

   471

            else:

   472

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

   473

   474

    def GenerateVariableTree(self, list):

   475

        tree = {}

   476

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

   477

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

   478

        return tree

   479

   480

    def IsValidVariable(self, name, context):

   481

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

   482

   483

    def IsCallParameter(self, name, call):

   484

        if call is not None:

   485

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

   486

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

   487

        return False

   488

   489

    def RefreshLineFolding(self, line_number):

   490

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

   491

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

   492

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

   493

            if line == "":

   494

                if line_number > 0:

   495

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

   496

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

   497

                    else:

   498

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

   499

                if level != wx.stc.STC_FOLDLEVELBASE:

   500

                    level |=  wx.stc.STC_FOLDLEVELWHITEFLAG 

   501

            elif LineStartswith(line, self.BlockStartKeywords):

   502

                level |= wx.stc.STC_FOLDLEVELHEADERFLAG

   503

            elif LineStartswith(line, self.BlockEndKeywords):

   504

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

   505

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

   506

                else:

   507

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

   508

            self.Editor.SetFoldLevel(line_number, level)

   509

   510

    def OnStyleNeeded(self, event):

   511

        self.TextChanged = True

   512

        line_number = self.Editor.LineFromPosition(self.Editor.GetEndStyled())

   513

        if line_number == 0:

   514

            start_pos = last_styled_pos = 0

   515

        else:

   516

            start_pos = last_styled_pos = self.Editor.GetLineEndPosition(line_number - 1) + 1

   517

        self.RefreshLineFolding(line_number)

   518

        end_pos = event.GetPosition()

   519

        self.StartStyling(start_pos, 0xff)

   520

   521

        current_context = self.Variables

   522

        current_call = None

   523

   524

        current_pos = last_styled_pos

   525

        state = SPACE

   526

        line = ""