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#!/usr/bin/env python

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

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# This file is part of Beremiz, a Integrated Development Environment for

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# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.

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#

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# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD

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#

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# See COPYING file for copyrights details.

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#

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# This program is free software; you can redistribute it and/or

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# modify it under the terms of the GNU General Public License

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# as published by the Free Software Foundation; either version 2

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

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#

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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# GNU General Public License for more details.

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#

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# You should have received a copy of the GNU General Public License

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

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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

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from __future__ import absolute_import

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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, IEC_BLOCK_START_KEYWORDS, LOCATIONDATATYPES

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from editors.EditorPanel import EditorPanel

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from controls.CustomStyledTextCtrl import CustomStyledTextCtrl, faces, GetCursorPos

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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,

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 STC_PLC_EMPTY] = range(11)

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[SPACE, WORD, NUMBER, STRING, WSTRING, COMMENT, PRAGMA, DPRAGMA] = range(8)

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[

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    ID_TEXTVIEWER, ID_TEXTVIEWERTEXTCTRL,

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

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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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    73

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def LineStartswith(line, symbols):

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

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class TextViewer(EditorPanel):

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    ID = ID_TEXTVIEWER

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    82

    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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    92

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

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    94

        # 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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        # 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")

   132

   133

        # Indentation size

   134

        self.Editor.SetTabWidth(2)

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        self.Editor.SetUseTabs(0)

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   137

        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)

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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)

   149

   150

    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])

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   154

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

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        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 = []

   161

        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.InstancePath = instancepath

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        self.ContextStack = []

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        self.CallStack = []

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        self.ResetSearchResults()

   171

   172

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

   173

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

   174

   175

    def __del__(self):

   176

        self.RefreshHighlightsTimer.Stop()

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   178

    def GetTitle(self):

   179

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

   180

            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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   185

    def GetInstancePath(self):

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        return self.InstancePath

   187

   188

    def IsViewing(self, tagname):

   189

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

   190

            return self.InstancePath == tagname

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        else:

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            return self.TagName == tagname

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   194

    def GetText(self):

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        return self.Editor.GetText()

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   197

    def SetText(self, text):

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        self.Editor.SetText(text)

   199

   200

    def SelectAll(self):

   201

        self.Editor.SelectAll()

   202

   203

    def Colourise(self, start, end):

   204

        self.Editor.Colourise(start, end)

   205

   206

    def StartStyling(self, pos, mask):

   207

        self.Editor.StartStyling(pos, mask)

   208

   209

    def SetStyling(self, length, style):

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        self.Editor.SetStyling(length, style)

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   212

    def GetCurrentPos(self):

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        return self.Editor.GetCurrentPos()

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   215

    def ResetSearchResults(self):

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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

   220

   221

    def OnModification(self, event):

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        if not self.DisableEvents:

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            mod_type = event.GetModificationType()

   224

            if mod_type & wx.stc.STC_MOD_BEFOREINSERT:

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                if self.CurrentAction is None:

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                    self.StartBuffering()

   227

                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())

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                wx.CallAfter(self.RefreshModel)

   232

            elif mod_type & wx.stc.STC_MOD_BEFOREDELETE:

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                if self.CurrentAction is None:

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                    self.StartBuffering()

   235

                elif self.CurrentAction[0] != "Delete" 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 = ("Delete", event.GetPosition())

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                wx.CallAfter(self.RefreshModel)

   240

        event.Skip()

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   242

    def OnDoDrop(self, event):

   243

        try:

   244

            values = eval(event.GetDragText())

   245

        except Exception:

   246

            values = event.GetDragText()

   247

        if isinstance(values, tuple):

   248

            message = None

   249

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

   250

                event.SetDragText("")

   251

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

   252

                blocktype = values[0]

   253

                blockname = values[2]

   254

                if len(values) > 3:

   255

                    blockinputs = values[3]

   256

                else:

   257

                    blockinputs = None

   258

                if values[1] != "function":

   259

                    if blockname == "":

   260

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

   261

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

   262

                            blockname = dialog.GetValue()

   263

                        else:

   264

                            event.SetDragText("")

   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

                    dlg = wx.TextEntryDialog(

   288

                        self.ParentWindow,

   289

                        _("Confirm or change variable name"),

   290

                        _('Variable Drop'), var_name)

   291

                    dlg.SetValue(var_name)

   292

                    var_name = dlg.GetValue() if dlg.ShowModal() == wx.ID_OK else None

   293

                    dlg.Destroy()

   294

                    if var_name is None:

   295

                        return

   296

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

   297

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

   298

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

   299

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

   300

                    else:

   301

                        location = values[0]

   302

                        if not location.startswith("%"):

   303

                            dialog = wx.SingleChoiceDialog(

   304

                                self.ParentWindow,

   305

                                _("Select a variable class:"),

   306

                                _("Variable class"),

   307

                                [_("Input"), _("Output"), _("Memory")],

   308

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

   309

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

   310

                                selected = dialog.GetSelection()

   311

                            else:

   312

                                selected = None

   313

                            dialog.Destroy()

   314

                            if selected is None:

   315

                                event.SetDragText("")

   316

                                return

   317

                            if selected == 0:

   318

                                location = "%I" + location

   319

                            elif selected == 1:

   320

                                location = "%Q" + location

   321

                            else:

   322

                                location = "%M" + location

   323

                        if values[2] is not None:

   324

                            var_type = values[2]

   325

                        else:

   326

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

   327

                        self.Controler.AddEditedElementPouVar(

   328

                            self.TagName,

   329

                            var_type, var_name,

   330

                            location=location, description=values[4])

   331

                        self.RefreshVariablePanel()

   332

                        self.RefreshVariableTree()

   333

                        event.SetDragText(var_name)

   334

                else:

   335

                    event.SetDragText("")

   336

            elif values[1] == "NamedConstant":

   337

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

   338

                if pou_type == "program":

   339

                    initval = values[0]

   340

                    var_name = values[3]

   341

                    dlg = wx.TextEntryDialog(

   342

                        self.ParentWindow,

   343

                        _("Confirm or change variable name"),

   344

                        _('Variable Drop'), var_name)

   345

                    dlg.SetValue(var_name)

   346

                    var_name = dlg.GetValue() if dlg.ShowModal() == wx.ID_OK else None

   347

                    dlg.Destroy()

   348

                    if var_name is None:

   349

                        return

   350

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

   351

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

   352

                    else:

   353

                        var_type = values[2]

   354

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

   355

                            self.Controler.AddEditedElementPouVar(self.TagName,

   356

                                                                  var_type,

   357

                                                                  var_name,

   358

                                                                  description=values[4], initval=initval)

   359

                            self.RefreshVariablePanel()

   360

                            self.RefreshVariableTree()

   361

                        event.SetDragText(var_name)

   362

            elif values[1] == "Global":

   363

                var_name = values[0]

   364

                dlg = wx.TextEntryDialog(

   365

                    self.ParentWindow,

   366

                    _("Confirm or change variable name"),

   367

                    _('Variable Drop'), var_name)

   368

                dlg.SetValue(var_name)

   369

                var_name = dlg.GetValue() if dlg.ShowModal() == wx.ID_OK else None

   370

                dlg.Destroy()

   371

                if var_name is None:

   372

                    return

   373

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

   374

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

   375

                else:

   376

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

   377

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

   378

                        self.RefreshVariablePanel()

   379

                        self.RefreshVariableTree()

   380

                    event.SetDragText(var_name)

   381

            elif values[1] == "Constant":

   382

                event.SetDragText(values[0])

   383

            elif values[3] == self.TagName:

   384

                self.ResetBuffer()

   385

                event.SetDragText(values[0])

   386

                wx.CallAfter(self.RefreshModel)

   387

            else:

   388

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

   389

            if message is not None:

   390

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

   391

                dialog.ShowModal()

   392

                dialog.Destroy()

   393

                event.SetDragText("")

   394

        event.Skip()

   395

   396

    def SetTextSyntax(self, syntax):

   397

        self.TextSyntax = syntax

   398

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

   399

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

   400

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

   401

            self.Editor.SetMarginSensitive(2, 1)

   402

            self.Editor.SetMarginWidth(2, 12)

   403

            if syntax == "ST":

   404

                self.BlockStartKeywords = ST_BLOCK_START_KEYWORDS

   405

                self.BlockEndKeywords = ST_BLOCK_START_KEYWORDS

   406

            else:

   407

                self.BlockStartKeywords = IEC_BLOCK_START_KEYWORDS

   408

                self.BlockEndKeywords = IEC_BLOCK_START_KEYWORDS

   409

        else:

   410

            self.BlockStartKeywords = []

   411

            self.BlockEndKeywords = []

   412

   413

    def SetKeywords(self, keywords):

   414

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

   415

        self.Colourise(0, -1)

   416

   417

    def RefreshJumpList(self):

   418

        if self.TextSyntax == "IL":

   419

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

   420

   421

    # Buffer the last model state

   422

    def RefreshBuffer(self):

   423

        self.Controler.BufferProject()

   424

        if self.ParentWindow:

   425

            self.ParentWindow.RefreshTitle()

   426

            self.ParentWindow.RefreshFileMenu()

   427

            self.ParentWindow.RefreshEditMenu()

   428

   429

    def StartBuffering(self):

   430

        self.Controler.StartBuffering()

   431

        if self.ParentWindow:

   432

            self.ParentWindow.RefreshTitle()

   433

            self.ParentWindow.RefreshFileMenu()

   434

            self.ParentWindow.RefreshEditMenu()

   435

   436

    def ResetBuffer(self):

   437

        if self.CurrentAction is not None:

   438

            self.Controler.EndBuffering()

   439

            self.CurrentAction = None

   440

   441

    def GetBufferState(self):

   442

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

   443

            return self.Controler.GetBufferState()

   444

        return False, False

   445

   446

    def Undo(self):

   447

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

   448

            self.Controler.LoadPrevious()

   449

            self.ParentWindow.CloseTabsWithoutModel()

   450

   451

    def Redo(self):

   452

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

   453

            self.Controler.LoadNext()

   454

            self.ParentWindow.CloseTabsWithoutModel()

   455

   456

    def HasNoModel(self):

   457

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

   458

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

   459

        return False

   460

   461

    def RefreshView(self, variablepanel=True):

   462

        EditorPanel.RefreshView(self, variablepanel)

   463

   464

        if self.Controler is not None:

   465

            self.ResetBuffer()

   466

            self.DisableEvents = True

   467

            old_cursor_pos = self.GetCurrentPos()

   468

            line = self.Editor.GetFirstVisibleLine()

   469

            column = self.Editor.GetXOffset()

   470

            old_text = self.GetText()

   471

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

   472

            if old_text != new_text:

   473

                self.SetText(new_text)

   474

                new_cursor_pos = GetCursorPos(old_text, new_text)

   475

                self.Editor.LineScroll(column, line)

   476

                if new_cursor_pos is not None:

   477

                    self.Editor.GotoPos(new_cursor_pos)

   478

                else:

   479

                    self.Editor.GotoPos(old_cursor_pos)

   480

                self.RefreshJumpList()

   481

                self.Editor.EmptyUndoBuffer()

   482

            self.DisableEvents = False

   483

   484

            self.RefreshVariableTree()

   485

   486

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

   487

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

   488

   489

            self.Functions = {}

   490

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

   491

                for blocktype in category["list"]:

   492

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

   493

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

   494

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

   495

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

   496

                            if param not in interface:

   497

                                interface[param] = {}

   498

                        if blockname in self.Functions:

   499

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

   500

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

   501

                        else: