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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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from __future__ import division

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import re

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from functools import reduce

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import wx

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import wx.stc

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from six.moves import xrange

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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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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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    71

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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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    75

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class TextViewer(EditorPanel):

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    def _init_Editor(self, prnt):

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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

    92

    93

        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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   108

        # 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)

   117

        self.Editor.SetMarginWidth(1, 50)

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   119

        # 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")

   127

   128

        # Indentation size

   129

        self.Editor.SetTabWidth(2)

   130

        self.Editor.SetUseTabs(0)

   131

   132

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

   138

        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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   145

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

   146

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

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

   148

   149

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

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   151

        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

   160

   161

        self.InstancePath = instancepath

   162

        self.ContextStack = []

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        self.CallStack = []

   164

   165

        self.ResetSearchResults()

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   167

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

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

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   170

    def __del__(self):

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        self.RefreshHighlightsTimer.Stop()

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   173

    def GetTitle(self):

   174

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

   175

            if len(self.InstancePath) > 15:

   176

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

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            return self.InstancePath

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        return EditorPanel.GetTitle(self)

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   180

    def GetInstancePath(self):

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        return self.InstancePath

   182

   183

    def IsViewing(self, tagname):

   184

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

   185

            return self.InstancePath == tagname

   186

        else:

   187

            return self.TagName == tagname

   188

   189

    def GetText(self):

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        return self.Editor.GetText()

   191

   192

    def SetText(self, text):

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        self.Editor.SetText(text)

   194

   195

    def SelectAll(self):

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        self.Editor.SelectAll()

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   198

    def Colourise(self, start, end):

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        self.Editor.Colourise(start, end)

   200

   201

    def StartStyling(self, pos, mask):

   202

        self.Editor.StartStyling(pos, mask)

   203

   204

    def SetStyling(self, length, style):

   205

        self.Editor.SetStyling(length, style)

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   207

    def GetCurrentPos(self):

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        return self.Editor.GetCurrentPos()

   209

   210

    def ResetSearchResults(self):

   211

        self.Highlights = []

   212

        self.SearchParams = None

   213

        self.SearchResults = None

   214

        self.CurrentFindHighlight = None

   215

   216

    def OnModification(self, event):

   217

        if not self.DisableEvents:

   218

            mod_type = event.GetModificationType()

   219

            if mod_type & wx.stc.STC_MOD_BEFOREINSERT:

   220

                if self.CurrentAction is None:

   221

                    self.StartBuffering()

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                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)

   227

            elif mod_type & wx.stc.STC_MOD_BEFOREDELETE:

   228

                if self.CurrentAction is None:

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                    self.StartBuffering()

   230

                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)

   235

        event.Skip()

   236

   237

    def OnDoDrop(self, event):

   238

        try:

   239

            values = eval(event.GetDragText())

   240

        except Exception:

   241

            values = event.GetDragText()

   242

        if isinstance(values, tuple):

   243

            message = None

   244

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

   245

                event.SetDragText("")

   246

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

   247

                blocktype = values[0]

   248

                blockname = values[2]

   249

                if len(values) > 3:

   250

                    blockinputs = values[3]

   251

                else:

   252

                    blockinputs = None

   253

                if values[1] != "function":

   254

                    if blockname == "":

   255

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

   256

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

   257

                            blockname = dialog.GetValue()

   258

                        else:

   259

                            event.SetDragText("")

   260

                            return

   261

                        dialog.Destroy()

   262

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

   263

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

   264

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

   265

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

   266

                    else:

   267

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

   268

                        self.RefreshVariablePanel()

   269

                        self.RefreshVariableTree()

   270

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

   271

                hint = ',\n    '.join(

   272

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

   273

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

   274

                if values[1] == "function":

   275

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

   276

                else:

   277

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

   278

            elif values[1] == "location":

   279

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

   280

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

   281

                    var_name = values[3]

   282

                    dlg = wx.TextEntryDialog(

   283

                        self.ParentWindow,

   284

                        _("Confirm or change variable name"),

   285

                        _('Variable Drop'), var_name)

   286

                    dlg.SetValue(var_name)

   287

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

   288

                    dlg.Destroy()

   289

                    if var_name is None:

   290

                        return

   291

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

   292

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

   293

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

   294

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

   295

                    else:

   296

                        location = values[0]

   297

                        if not location.startswith("%"):

   298

                            dialog = wx.SingleChoiceDialog(

   299

                                self.ParentWindow,

   300

                                _("Select a variable class:"),

   301

                                _("Variable class"),

   302

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

   303

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

   304

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

   305

                                selected = dialog.GetSelection()

   306

                            else:

   307

                                selected = None

   308

                            dialog.Destroy()

   309

                            if selected is None:

   310

                                event.SetDragText("")

   311

                                return

   312

                            if selected == 0:

   313

                                location = "%I" + location

   314

                            elif selected == 1:

   315

                                location = "%Q" + location

   316

                            else:

   317

                                location = "%M" + location

   318

                        if values[2] is not None:

   319

                            var_type = values[2]

   320

                        else:

   321

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

   322

                        self.Controler.AddEditedElementPouVar(

   323

                            self.TagName,

   324

                            var_type, var_name,

   325

                            location=location, description=values[4])

   326

                        self.RefreshVariablePanel()

   327

                        self.RefreshVariableTree()

   328

                        event.SetDragText(var_name)

   329

                else:

   330

                    event.SetDragText("")

   331

            elif values[1] == "NamedConstant":

   332

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

   333

                if pou_type == "program":

   334

                    initval = values[0]

   335

                    var_name = values[3]

   336

                    dlg = wx.TextEntryDialog(

   337

                        self.ParentWindow,

   338

                        _("Confirm or change variable name"),

   339

                        _('Variable Drop'), var_name)

   340

                    dlg.SetValue(var_name)

   341

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

   342

                    dlg.Destroy()

   343

                    if var_name is None:

   344

                        return

   345

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

   346

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

   347

                    else:

   348

                        var_type = values[2]

   349

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

   350

                            self.Controler.AddEditedElementPouVar(self.TagName,

   351

                                                                  var_type,

   352

                                                                  var_name,

   353

                                                                  description=values[4], initval=initval)

   354

                            self.RefreshVariablePanel()

   355

                            self.RefreshVariableTree()

   356

                        event.SetDragText(var_name)

   357

            elif values[1] == "Global":

   358

                var_name = values[0]

   359

                dlg = wx.TextEntryDialog(

   360

                    self.ParentWindow,

   361

                    _("Confirm or change variable name"),

   362

                    _('Variable Drop'), var_name)

   363

                dlg.SetValue(var_name)

   364

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

   365

                dlg.Destroy()

   366

                if var_name is None:

   367

                    return

   368

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

   369

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

   370

                else:

   371

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

   372

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

   373

                        self.RefreshVariablePanel()

   374

                        self.RefreshVariableTree()

   375

                    event.SetDragText(var_name)

   376

            elif values[1] == "Constant":

   377

                event.SetDragText(values[0])

   378

            elif values[3] == self.TagName:

   379

                self.ResetBuffer()

   380

                event.SetDragText(values[0])

   381

                wx.CallAfter(self.RefreshModel)

   382

            else:

   383

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

   384

            if message is not None:

   385

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

   386

                dialog.ShowModal()

   387

                dialog.Destroy()

   388

                event.SetDragText("")

   389

        event.Skip()

   390

   391

    def SetTextSyntax(self, syntax):

   392

        self.TextSyntax = syntax

   393

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

   394

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

   395

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

   396

            self.Editor.SetMarginSensitive(2, 1)

   397

            self.Editor.SetMarginWidth(2, 12)

   398

            if syntax == "ST":

   399

                self.BlockStartKeywords = ST_BLOCK_START_KEYWORDS

   400

                self.BlockEndKeywords = ST_BLOCK_START_KEYWORDS

   401

            else:

   402

                self.BlockStartKeywords = IEC_BLOCK_START_KEYWORDS

   403

                self.BlockEndKeywords = IEC_BLOCK_START_KEYWORDS

   404

        else:

   405

            self.BlockStartKeywords = []

   406

            self.BlockEndKeywords = []

   407

   408

    def SetKeywords(self, keywords):

   409

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

   410

        self.Colourise(0, -1)

   411

   412

    def RefreshJumpList(self):

   413

        if self.TextSyntax == "IL":

   414

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

   415

   416

    # Buffer the last model state

   417

    def RefreshBuffer(self):

   418

        self.Controler.BufferProject()

   419

        if self.ParentWindow:

   420

            self.ParentWindow.RefreshTitle()

   421

            self.ParentWindow.RefreshFileMenu()

   422

            self.ParentWindow.RefreshEditMenu()

   423

   424

    def StartBuffering(self):

   425

        self.Controler.StartBuffering()

   426

        if self.ParentWindow:

   427

            self.ParentWindow.RefreshTitle()

   428

            self.ParentWindow.RefreshFileMenu()

   429

            self.ParentWindow.RefreshEditMenu()

   430

   431

    def ResetBuffer(self):

   432

        if self.CurrentAction is not None:

   433

            self.Controler.EndBuffering()

   434

            self.CurrentAction = None

   435

   436

    def GetBufferState(self):

   437

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

   438

            return self.Controler.GetBufferState()

   439

        return False, False

   440

   441

    def Undo(self):

   442

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

   443

            self.Controler.LoadPrevious()

   444

            self.ParentWindow.CloseTabsWithoutModel()

   445

   446

    def Redo(self):

   447

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

   448

            self.Controler.LoadNext()

   449

            self.ParentWindow.CloseTabsWithoutModel()

   450

   451

    def HasNoModel(self):

   452

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

   453

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

   454

        return False

   455

   456

    def RefreshView(self, variablepanel=True):

   457

        EditorPanel.RefreshView(self, variablepanel)

   458

   459

        if self.Controler is not None:

   460

            self.ResetBuffer()

   461

            self.DisableEvents = True

   462

            old_cursor_pos = self.GetCurrentPos()

   463

            line = self.Editor.GetFirstVisibleLine()

   464

            column = self.Editor.GetXOffset()

   465

            old_text = self.GetText()

   466

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

   467

            if old_text != new_text:

   468

                self.SetText(new_text)

   469

                new_cursor_pos = GetCursorPos(old_text, new_text)

   470

                self.Editor.LineScroll(column, line)

   471

                if new_cursor_pos is not None:

   472

                    self.Editor.GotoPos(new_cursor_pos)

   473

                else:

   474

                    self.Editor.GotoPos(old_cursor_pos)

   475

                self.RefreshJumpList()

   476

                self.Editor.EmptyUndoBuffer()

   477

            self.DisableEvents = False

   478

   479

            self.RefreshVariableTree()

   480

   481

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

   482

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

   483

   484

            self.Functions = {}

   485

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

   486

                for blocktype in category["list"]:

   487

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

   488

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

   489

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

   490

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

   491

                            if param not in interface:

   492

                                interface[param] = {}

   493

                        if blockname in self.Functions:

   494

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

   495

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

   496

                        else:

   497

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

   498

                                                         "extensible": blocktype["extensible"]}

   499

   500

        self.Colourise(0, -1)

   501

   502

    def RefreshVariableTree(self):