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

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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, 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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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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   106

class TextViewer(EditorPanel):

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    ID = ID_TEXTVIEWER

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   110

    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.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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   125

        self.Editor.SetViewWhiteSpace(False)

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   127

        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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   148

        # Indicators styles

   149

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

   150

        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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   159

        # 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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   168

        # Indentation size

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        self.Editor.SetTabWidth(2)

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        self.Editor.SetUseTabs(0)

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   172

        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)

   177

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

   178

        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)

   183

   184

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

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

   186

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

   187

   188

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

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   190

        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.SearchParams = None

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        self.SearchResults = None

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        self.CurrentFindHighlight = None

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        self.InstancePath = instancepath

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        self.ContextStack = []

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        self.CallStack = []

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   207

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

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

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   210

    def __del__(self):

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        self.RefreshHighlightsTimer.Stop()

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   213

    def GetTitle(self):

   214

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

   215

            if len(self.InstancePath) > 15:

   216

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

   217

            return self.InstancePath

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        return EditorPanel.GetTitle(self)

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   220

    def GetInstancePath(self):

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        return self.InstancePath

   222

   223

    def IsViewing(self, tagname):

   224

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

   225

            return self.InstancePath == tagname

   226

        else:

   227

            return self.TagName == tagname

   228

   229

    def GetText(self):

   230

        return self.Editor.GetText()

   231

   232

    def SetText(self, text):

   233

        self.Editor.SetText(text)

   234

   235

    def SelectAll(self):

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        self.Editor.SelectAll()

   237

   238

    def Colourise(self, start, end):

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        self.Editor.Colourise(start, end)

   240

   241

    def StartStyling(self, pos, mask):

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        self.Editor.StartStyling(pos, mask)

   243

   244

    def SetStyling(self, length, style):

   245

        self.Editor.SetStyling(length, style)

   246

   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

                blocktype = values[0]

   282

                blockname = values[2]

   283

                if len(values) > 3:

   284

                    blockinputs = values[3]

   285

                else:

   286

                    blockinputs = None

   287

                if values[1] != "function": 

   288

                    if blockname == "":

   289

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

   290

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

   291

                            blockname = dialog.GetValue()

   292

                        else:

   293

                            return

   294

                        dialog.Destroy()

   295

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

   296

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

   297

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

   298

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

   299

                    else:

   300

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

   301

                        self.RefreshVariablePanel()

   302

                        self.RefreshVariableTree()

   303

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

   304

                hint = ',\n    '.join(

   305

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

   306

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

   307

                if values[1] == "function":

   308

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

   309

                else:

   310

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

   311

            elif values[1] == "location":

   312

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

   313

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

   314

                    var_name = values[3]

   315

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

   316

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

   317

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

   318

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

   319

                    else:

   320

                        location = values[0]

   321

                        if not location.startswith("%"):

   322

                            dialog = wx.SingleChoiceDialog(self.ParentWindow, 

   323

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

   324

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

   325

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

   326

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

   327

                                selected = dialog.GetSelection()

   328

                            else:

   329

                                selected = None

   330

                            dialog.Destroy()

   331

                            if selected is None:

   332

                                event.SetDragText("")

   333

                                return

   334

                            if selected == 0:

   335

                                location = "%I" + location

   336

                            elif selected == 1:

   337

                                location = "%Q" + location

   338

                            else:

   339

                                location = "%M" + location

   340

                        if values[2] is not None:

   341

                            var_type = values[2]

   342

                        else:

   343

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

   344

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

   345

                        self.RefreshVariablePanel()

   346

                        self.RefreshVariableTree()

   347

                        event.SetDragText(var_name)

   348

                else:

   349

                    event.SetDragText("")

   350

            elif values[1] == "Global":

   351

                var_name = values[0]

   352

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

   353

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

   354

                else:

   355

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

   356

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

   357

                        self.RefreshVariablePanel()

   358

                        self.RefreshVariableTree()

   359

                    event.SetDragText(var_name)

   360

            elif values[1] == "Constant":

   361

                event.SetDragText(values[0])

   362

            elif values[3] == self.TagName:

   363

                self.ResetBuffer()

   364

                event.SetDragText(values[0])

   365

                wx.CallAfter(self.RefreshModel)

   366

            else:

   367

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

   368

            if message is not None:

   369

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

   370

                dialog.ShowModal()

   371

                dialog.Destroy()

   372

                event.SetDragText("")

   373

        event.Skip()

   374

   375

    def SetTextSyntax(self, syntax):

   376

        self.TextSyntax = syntax

   377

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

   378

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

   379

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

   380

            self.Editor.SetMarginSensitive(2, 1)

   381

            self.Editor.SetMarginWidth(2, 12)

   382

            if syntax == "ST":

   383

                self.BlockStartKeywords = ST_BLOCK_START_KEYWORDS

   384

                self.BlockEndKeywords = ST_BLOCK_START_KEYWORDS

   385

            else:

   386

                self.BlockStartKeywords = IEC_BLOCK_START_KEYWORDS

   387

                self.BlockEndKeywords = IEC_BLOCK_START_KEYWORDS

   388

        else:

   389

            self.BlockStartKeywords = []

   390

            self.BlockEndKeywords = []

   391

   392

    def SetKeywords(self, keywords):

   393

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

   394

        self.Colourise(0, -1)

   395

   396

    def RefreshJumpList(self):

   397

        if self.TextSyntax != "IL":

   398

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

   399

            self.Colourise(0, -1)

   400

   401

    # Buffer the last model state

   402

    def RefreshBuffer(self):

   403

        self.Controler.BufferProject()

   404

        if self.ParentWindow:

   405

            self.ParentWindow.RefreshTitle()

   406

            self.ParentWindow.RefreshFileMenu()

   407

            self.ParentWindow.RefreshEditMenu()

   408

   409

    def StartBuffering(self):

   410

        self.Controler.StartBuffering()

   411

        if self.ParentWindow:

   412

            self.ParentWindow.RefreshTitle()

   413

            self.ParentWindow.RefreshFileMenu()

   414

            self.ParentWindow.RefreshEditMenu()

   415

   416

    def ResetBuffer(self):

   417

        if self.CurrentAction != None:

   418

            self.Controler.EndBuffering()

   419

            self.CurrentAction = None

   420

   421

    def GetBufferState(self):

   422

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

   423

            return self.Controler.GetBufferState()

   424

        return False, False

   425

   426

    def Undo(self):

   427

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

   428

            self.Controler.LoadPrevious()

   429

            self.ParentWindow.CloseTabsWithoutModel()

   430

   431

    def Redo(self):

   432

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

   433

            self.Controler.LoadNext()

   434

            self.ParentWindow.CloseTabsWithoutModel()

   435

   436

    def HasNoModel(self):

   437

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

   438

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

   439

        return False

   440

   441

    def RefreshView(self, variablepanel=True):

   442

        EditorPanel.RefreshView(self, variablepanel)

   443

   444

        if self.Controler is not None:

   445

            self.ResetBuffer()

   446

            self.DisableEvents = True

   447

            old_cursor_pos = self.GetCurrentPos()

   448

            old_text = self.GetText()

   449

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

   450

            self.SetText(new_text)

   451

            new_cursor_pos = GetCursorPos(old_text, new_text)

   452

            if new_cursor_pos != None:

   453

                self.Editor.GotoPos(new_cursor_pos)

   454

            else:

   455

                self.Editor.GotoPos(old_cursor_pos)

   456

            self.Editor.ScrollToColumn(0)

   457

            self.RefreshJumpList()

   458

            self.Editor.EmptyUndoBuffer()

   459

            self.DisableEvents = False

   460

   461

            self.RefreshVariableTree()

   462

   463

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

   464

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

   465

   466

            self.Functions = {}

   467

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

   468

                for blocktype in category["list"]:

   469

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

   470

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

   471

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

   472

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

   473

                            if not interface.has_key(param):

   474

                                interface[param] = {}

   475

                        if self.Functions.has_key(blockname):

   476

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

   477

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

   478

                        else:

   479

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

   480

                                                         "extensible": blocktype["extensible"]}

   481

   482

        self.Colourise(0, -1)

   483

   484

    def RefreshVariableTree(self):

   485

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

   486

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

   487

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

   488

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

   489

            if return_type is not None:

   490

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

   491

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

   492

            else:

   493

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

   494

   495

    def GenerateVariableTree(self, list):

   496

        tree = {}

   497

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

   498

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

   499

        return tree

   500

   501

    def IsValidVariable(self, name, context):

   502

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

   503

   504

    def IsCallParameter(self, name, call):

   505

        if call is not None:

   506

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

   507

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

   508

        return False

   509

   510

    def RefreshLineFolding(self, line_number):

   511

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

   512

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

   513

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

   514

            if line == "":

   515

                if line_number > 0:

   516

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

   517

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

   518

                    else:

   519

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

   520

                if level != wx.stc.STC_FOLDLEVELBASE:

   521

                    level |=  wx.stc.STC_FOLDLEVELWHITEFLAG 

   522

            elif LineStartswith(line, self.BlockStartKeywords):

   523

                level |= wx.stc.STC_FOLDLEVELHEADERFLAG

   524

            elif LineStartswith(line, self.BlockEndKeywords):

   525

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

   526

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

   527

                else:

   528

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

   529

            self.Editor.SetFoldLevel(line_number, level)