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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 math

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from types import TupleType

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from threading import Lock

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import wx

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from plcopen.structures import *

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from PLCControler import ITEM_POU

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from dialogs import *

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from graphics import *

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from controls import EditorPanel

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SCROLLBAR_UNIT = 10

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WINDOW_BORDER = 10

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SCROLL_ZONE = 10

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CURSORS = None

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def ResetCursors():

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    global CURSORS

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    if CURSORS == None:

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        CURSORS = [wx.NullCursor, 

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                   wx.StockCursor(wx.CURSOR_HAND),

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                   wx.StockCursor(wx.CURSOR_SIZENWSE),

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                   wx.StockCursor(wx.CURSOR_SIZENESW),

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                   wx.StockCursor(wx.CURSOR_SIZEWE),

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                   wx.StockCursor(wx.CURSOR_SIZENS)]

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def AppendMenu(parent, help, id, kind, text):

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    if wx.VERSION >= (2, 6, 0):

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        parent.Append(help=help, id=id, kind=kind, text=text)

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    else:

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        parent.Append(helpString=help, id=id, kind=kind, item=text)

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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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ZOOM_FACTORS = [math.sqrt(2) ** x for x in xrange(-6, 7)]

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def GetVariableCreationFunction(variable_type):

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    def variableCreationFunction(viewer, id, specific_values):

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        return FBD_Variable(viewer, variable_type, 

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                                    specific_values["name"], 

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                                    specific_values["value_type"], 

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                                    id,

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                                    specific_values["executionOrder"])

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    return variableCreationFunction

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def GetConnectorCreationFunction(connector_type):

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    def connectorCreationFunction(viewer, id, specific_values):

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        return FBD_Connector(viewer, connector_type, 

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                                     specific_values["name"], id)

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    return connectorCreationFunction

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def commentCreationFunction(viewer, id, specific_values):

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    return Comment(viewer, specific_values["content"], id)

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def GetPowerRailCreationFunction(powerrail_type):

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    def powerRailCreationFunction(viewer, id, specific_values):

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        return LD_PowerRail(viewer, powerrail_type, id, 

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                                    specific_values["connectors"])

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    return powerRailCreationFunction

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CONTACT_TYPES = {(True, "none"): CONTACT_REVERSE,

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                 (False, "rising"): CONTACT_RISING,

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                 (False, "falling"): CONTACT_FALLING}

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def contactCreationFunction(viewer, id, specific_values):

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    contact_type = CONTACT_TYPES.get((specific_values.get("negated", False), 

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                                      specific_values.get("edge", "none")),

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                                     CONTACT_NORMAL)

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    return LD_Contact(viewer, contact_type, specific_values["name"], id)

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COIL_TYPES = {(True, "none", "none"): COIL_REVERSE,

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              (False, "none", "set"): COIL_SET,

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              (False, "none", "reset"): COIL_RESET,

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              (False, "rising", "none"): COIL_RISING,

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              (False, "falling", "none"): COIL_FALLING}

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def coilCreationFunction(viewer, id, specific_values):

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    coil_type = COIL_TYPES.get((specific_values.get("negated", False), 

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                                specific_values.get("edge", "none"),

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                                specific_values.get("storage", "none")),

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                               COIL_NORMAL)

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    return LD_Coil(viewer, coil_type, specific_values["name"], id)

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def stepCreationFunction(viewer, id, specific_values):

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    step = SFC_Step(viewer, specific_values["name"], 

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                            specific_values.get("initial", False), id)

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    if specific_values.get("action", None):

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        step.AddAction()

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        connector = step.GetActionConnector()

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        connector.SetPosition(wx.Point(*specific_values["action"]["position"]))

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    return step

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def transitionCreationFunction(viewer, id, specific_values):

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    transition = SFC_Transition(viewer, specific_values["condition_type"], 

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                                        specific_values.get("condition", None), 

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                                        specific_values["priority"], id)

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    return transition

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def GetDivergenceCreationFunction(divergence_type):

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    def divergenceCreationFunction(viewer, id, specific_values):

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        return SFC_Divergence(viewer, divergence_type, 

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                                      specific_values["connectors"], id)

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    return divergenceCreationFunction

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def jumpCreationFunction(viewer, id, specific_values):

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    return SFC_Jump(viewer, specific_values["target"], id)

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def actionBlockCreationFunction(viewer, id, specific_values):

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    return SFC_ActionBlock(viewer, specific_values["actions"], id)

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ElementCreationFunctions = {

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    "input": GetVariableCreationFunction(INPUT),

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    "output": GetVariableCreationFunction(OUTPUT),

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    "inout": GetVariableCreationFunction(INOUT),

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    "connector": GetConnectorCreationFunction(CONNECTOR),

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    "continuation": GetConnectorCreationFunction(CONTINUATION),

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    "comment": commentCreationFunction,

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    "leftPowerRail": GetPowerRailCreationFunction(LEFTRAIL),

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    "rightPowerRail": GetPowerRailCreationFunction(RIGHTRAIL),

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    "contact": contactCreationFunction,

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    "coil": coilCreationFunction,

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    "step": stepCreationFunction, 

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    "transition": transitionCreationFunction,

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    "selectionDivergence": GetDivergenceCreationFunction(SELECTION_DIVERGENCE), 

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    "selectionConvergence": GetDivergenceCreationFunction(SELECTION_CONVERGENCE), 

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    "simultaneousDivergence": GetDivergenceCreationFunction(SIMULTANEOUS_DIVERGENCE), 

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    "simultaneousConvergence": GetDivergenceCreationFunction(SIMULTANEOUS_CONVERGENCE), 

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    "jump": jumpCreationFunction,

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    "actionBlock": actionBlockCreationFunction,

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}

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

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#                       Graphic elements Viewer base class

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

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# ID Constants for alignment menu items

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[ID_VIEWERALIGNMENTMENUITEMS0, ID_VIEWERALIGNMENTMENUITEMS1,

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 ID_VIEWERALIGNMENTMENUITEMS2, ID_VIEWERALIGNMENTMENUITEMS4,

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 ID_VIEWERALIGNMENTMENUITEMS5, ID_VIEWERALIGNMENTMENUITEMS6,

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] = [wx.NewId() for _init_coll_AlignmentMenu_Items in range(6)]

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# ID Constants for contextual menu items

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[ID_VIEWERCONTEXTUALMENUITEMS0, ID_VIEWERCONTEXTUALMENUITEMS1,

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 ID_VIEWERCONTEXTUALMENUITEMS2, ID_VIEWERCONTEXTUALMENUITEMS3,

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 ID_VIEWERCONTEXTUALMENUITEMS5, ID_VIEWERCONTEXTUALMENUITEMS6,

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 ID_VIEWERCONTEXTUALMENUITEMS8, ID_VIEWERCONTEXTUALMENUITEMS9,

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 ID_VIEWERCONTEXTUALMENUITEMS11, ID_VIEWERCONTEXTUALMENUITEMS12,

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 ID_VIEWERCONTEXTUALMENUITEMS14, ID_VIEWERCONTEXTUALMENUITEMS16,

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 ID_VIEWERCONTEXTUALMENUITEMS17,

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] = [wx.NewId() for _init_coll_ContextualMenu_Items in range(13)]

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class ViewerDropTarget(wx.TextDropTarget):

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    def __init__(self, parent):

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        wx.TextDropTarget.__init__(self)

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        self.ParentWindow = parent

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    def OnDropText(self, x, y, data):

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        tagname = self.ParentWindow.GetTagName()

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        pou_name, pou_type = self.ParentWindow.Controler.GetEditedElementType(tagname, self.ParentWindow.Debug)

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        x, y = self.ParentWindow.CalcUnscrolledPosition(x, y)

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        x = int(x / self.ParentWindow.ViewScale[0])

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        y = int(y / self.ParentWindow.ViewScale[1])

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        scaling = self.ParentWindow.Scaling

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        message = None

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        try:

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            values = eval(data)

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        except:

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            message = _("Invalid value \"%s\" for viewer block")%data

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            values = None

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        if not isinstance(values, TupleType):

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            message = _("Invalid value \"%s\" for viewer block")%data

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            values = None

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        if values is not None:

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            if values[1] == "debug":

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                pass

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            elif values[1] == "program":

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                message = _("Programs can't be used by other POUs!")

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

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                words = tagname.split("::")

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                if pou_name == values[0]:

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                    message = _("\"%s\" can't use itself!")%pou_name

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                elif pou_type == "function" and values[1] != "function":

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                    message = _("Function Blocks can't be used in Functions!")

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                elif words[0] == "T" and values[1] != "function":

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                    message = _("Function Blocks can't be used in Transitions!")

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                elif self.ParentWindow.Controler.PouIsUsedBy(pou_name, values[0], self.ParentWindow.Debug):

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                    message = _("\"%s\" is already used by \"%s\"!")%(pou_name, values[0])

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                else:

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                    blockname = values[2]

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                    if len(values) > 3:

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                        blockinputs = values[3]

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                    else:

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                        blockinputs = None

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                    if values[1] != "function" and blockname == "":

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

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

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                            blockname = dialog.GetValue()

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                        else:

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                            return

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                        dialog.Destroy()

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

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

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

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

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                    else:

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                        id = self.ParentWindow.GetNewId()

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                        block = FBD_Block(self.ParentWindow, values[0], blockname, id, inputs = blockinputs)

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                        width, height = block.GetMinSize()

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                        if scaling is not None:

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                            x = round(float(x) / float(scaling[0])) * scaling[0]

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                            y = round(float(y) / float(scaling[1])) * scaling[1]

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                            width = round(float(width) / float(scaling[0]) + 0.5) * scaling[0]

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                            height = round(float(height) / float(scaling[1]) + 0.5) * scaling[1]

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                        block.SetPosition(x, y)

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                        block.SetSize(width, height)

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                        self.ParentWindow.AddBlock(block)

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                        self.ParentWindow.Controler.AddEditedElementBlock(tagname, id, values[0], blockname)

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                        self.ParentWindow.RefreshBlockModel(block)

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                        self.ParentWindow.RefreshBuffer()

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                        self.ParentWindow.RefreshScrollBars()

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                        self.ParentWindow.RefreshVisibleElements()

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                        self.ParentWindow.RefreshVariablePanel()

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                        self.ParentWindow.Refresh(False)

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            elif values[1] == "location":

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

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                    var_name = values[3]

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

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

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                    else:

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                        if values[0][1] == "Q":

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                            var_class = OUTPUT

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                        else:

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                            var_class = INPUT

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                        if values[2] is not None:

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                            var_type = values[2]

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                        else:

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

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

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

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                        self.ParentWindow.RefreshVariablePanel()

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            elif values[3] == tagname:

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                if values[1] == "Output":

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                    var_class = OUTPUT

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                elif values[1] == "InOut":

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                    var_class = INPUT

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                else:

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                    var_class = INPUT

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                tree = dict([(var["Name"], var["Tree"]) for var in self.ParentWindow.Controler.GetEditedElementInterfaceVars(tagname, self.ParentWindow.Debug)]).get(values[0], None)

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                if tree is not None:

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                    if len(tree[0]) > 0:

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                        menu = wx.Menu(title='')

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                        self.GenerateTreeMenu(x, y, scaling, menu, "", var_class, [(values[0], values[2], tree)])

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                        self.ParentWindow.PopupMenuXY(menu)

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                    else:

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                        self.ParentWindow.AddVariableBlock(x, y, scaling, var_class, values[0], values[2])

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                else:

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                    message = _("Unknown variable \"%s\" for this POU!") % values[0]

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            else:

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

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        if message is not None:

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            wx.CallAfter(self.ShowMessage, message)

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    def GenerateTreeMenu(self, x, y, scaling, menu, base_path, var_class, tree):

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        for child_name, child_type, (child_tree, child_dimensions) in tree:

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            if base_path:

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                child_path = "%s.%s" % (base_path, child_name)

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            else:

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                child_path = child_name

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            if len(child_dimensions) > 0:

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                child_path += "[%s]" % ",".join([str(dimension[0]) for dimension in child_dimensions])

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                child_name += "[]"

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            new_id = wx.NewId()

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            AppendMenu(menu, help='', id=new_id, kind=wx.ITEM_NORMAL, text=child_name)

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            self.ParentWindow.Bind(wx.EVT_MENU, self.GetAddVariableBlockFunction(x, y, scaling, var_class, child_path, child_type), id=new_id)

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            if len(child_tree) > 0:

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                new_id = wx.NewId()

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                child_menu = wx.Menu(title='')

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                self.GenerateTreeMenu(x, y, scaling, child_menu, child_path, var_class, child_tree)

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                menu.AppendMenu(new_id, "%s." % child_name, child_menu)

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    def GetAddVariableBlockFunction(self, x, y, scaling, var_class, var_name, var_type):

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        def AddVariableFunction(event):

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            self.ParentWindow.AddVariableBlock(x, y, scaling, var_class, var_name, var_type)

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        return AddVariableFunction

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    def ShowMessage(self, message):

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

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        message.ShowModal()

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        message.Destroy()

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"""

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Class that implements a Viewer based on a wx.ScrolledWindow for drawing and 

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manipulating graphic elements

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"""

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class Viewer(EditorPanel, DebugViewer):

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

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

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            if id is not None:

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                event(self, id, function)

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            else:

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                event(self, function)

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    # Create Alignment Menu items

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    def _init_coll_AlignmentMenu_Items(self, parent):

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        # Create menu items

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        AppendMenu(parent, help='', id=ID_VIEWERALIGNMENTMENUITEMS0,

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              kind=wx.ITEM_NORMAL, text=_(u'Left'))

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        AppendMenu(parent, help='', id=ID_VIEWERALIGNMENTMENUITEMS1,

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              kind=wx.ITEM_NORMAL, text=_(u'Center'))

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        AppendMenu(parent, help='', id=ID_VIEWERALIGNMENTMENUITEMS2,

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              kind=wx.ITEM_NORMAL, text=_(u'Right'))

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        parent.AppendSeparator()

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        AppendMenu(parent, help='', id=ID_VIEWERALIGNMENTMENUITEMS4,

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              kind=wx.ITEM_NORMAL, text=_(u'Top'))

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        AppendMenu(parent, help='', id=ID_VIEWERALIGNMENTMENUITEMS5,

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              kind=wx.ITEM_NORMAL, text=_(u'Middle'))

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        AppendMenu(parent, help='', id=ID_VIEWERALIGNMENTMENUITEMS6,

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              kind=wx.ITEM_NORMAL, text=_(u'Bottom'))

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        # Link menu event to corresponding called functions

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        self.Bind(wx.EVT_MENU, self.OnAlignLeftMenu,

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              id=ID_VIEWERALIGNMENTMENUITEMS0)

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        self.Bind(wx.EVT_MENU, self.OnAlignCenterMenu,

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              id=ID_VIEWERALIGNMENTMENUITEMS1)

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        self.Bind(wx.EVT_MENU, self.OnAlignRightMenu,

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              id=ID_VIEWERALIGNMENTMENUITEMS2)

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        self.Bind(wx.EVT_MENU, self.OnAlignTopMenu,

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              id=ID_VIEWERALIGNMENTMENUITEMS4)

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        self.Bind(wx.EVT_MENU, self.OnAlignMiddleMenu,

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              id=ID_VIEWERALIGNMENTMENUITEMS5)

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        self.Bind(wx.EVT_MENU, self.OnAlignBottomMenu,

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              id=ID_VIEWERALIGNMENTMENUITEMS6)

   387

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    # Create Contextual Menu items

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    def _init_coll_ContextualMenu_Items(self, parent):

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        # Create menu items

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        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS0,

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              kind=wx.ITEM_RADIO, text=_(u'No Modifier'))

   393

        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS1,

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              kind=wx.ITEM_RADIO, text=_(u'Negated'))

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        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS2,

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              kind=wx.ITEM_RADIO, text=_(u'Rising Edge'))

   397

        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS3,

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              kind=wx.ITEM_RADIO, text=_(u'Falling Edge'))

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        parent.AppendSeparator()

   400

        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS5,

   401

              kind=wx.ITEM_NORMAL, text=_(u'Add Wire Segment'))

   402

        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS6,

   403

              kind=wx.ITEM_NORMAL, text=_(u'Delete Wire Segment'))

   404

        parent.AppendSeparator()

   405

        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS8,

   406

              kind=wx.ITEM_NORMAL, text=_(u'Add Divergence Branch'))

   407

        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS9,

   408

              kind=wx.ITEM_NORMAL, text=_(u'Delete Divergence Branch'))

   409

        parent.AppendSeparator()

   410

        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS11,

   411

              kind=wx.ITEM_NORMAL, text=_(u'Clear Execution Order'))

   412

        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS12,

   413

              kind=wx.ITEM_NORMAL, text=_(u'Reset Execution Order'))

   414

        parent.AppendSeparator()

   415

        parent.AppendMenu(ID_VIEWERCONTEXTUALMENUITEMS14, _("Alignment"), self.AlignmentMenu)

   416

        parent.AppendSeparator()

   417

        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS16,

   418

              kind=wx.ITEM_NORMAL, text=_(u'Edit Block'))

   419

        AppendMenu(parent, help='', id=ID_VIEWERCONTEXTUALMENUITEMS17,

   420

              kind=wx.ITEM_NORMAL, text=_(u'Delete'))

   421

        # Link menu event to corresponding called functions

   422

        self.Bind(wx.EVT_MENU, self.OnNoModifierMenu,

   423

              id=ID_VIEWERCONTEXTUALMENUITEMS0)

   424

        self.Bind(wx.EVT_MENU, self.OnNegatedMenu,

   425

              id=ID_VIEWERCONTEXTUALMENUITEMS1)

   426

        self.Bind(wx.EVT_MENU, self.OnRisingEdgeMenu,

   427

              id=ID_VIEWERCONTEXTUALMENUITEMS2)

   428

        self.Bind(wx.EVT_MENU, self.OnFallingEdgeMenu,

   429

              id=ID_VIEWERCONTEXTUALMENUITEMS3)

   430

        self.Bind(wx.EVT_MENU, self.OnAddSegmentMenu,

   431

              id=ID_VIEWERCONTEXTUALMENUITEMS5)

   432

        self.Bind(wx.EVT_MENU, self.OnDeleteSegmentMenu,

   433

              id=ID_VIEWERCONTEXTUALMENUITEMS6)

   434

        self.Bind(wx.EVT_MENU, self.OnAddBranchMenu,

   435

              id=ID_VIEWERCONTEXTUALMENUITEMS8)

   436

        self.Bind(wx.EVT_MENU, self.OnDeleteBranchMenu,

   437

              id=ID_VIEWERCONTEXTUALMENUITEMS9)

   438

        self.Bind(wx.EVT_MENU, self.OnClearExecutionOrderMenu,

   439

              id=ID_VIEWERCONTEXTUALMENUITEMS11)

   440

        self.Bind(wx.EVT_MENU, self.OnResetExecutionOrderMenu,

   441

              id=ID_VIEWERCONTEXTUALMENUITEMS12)

   442

        self.Bind(wx.EVT_MENU, self.OnEditBlockMenu,

   443

              id=ID_VIEWERCONTEXTUALMENUITEMS16)

   444

        self.Bind(wx.EVT_MENU, self.OnDeleteMenu,

   445

              id=ID_VIEWERCONTEXTUALMENUITEMS17)

   446

   447

    # Create and initialize Contextual Menu

   448

    def _init_menus(self):

   449

        self.AlignmentMenu = wx.Menu(title='')

   450

        self.ContextualMenu = wx.Menu(title='')

   451

   452

        self._init_coll_AlignmentMenu_Items(self.AlignmentMenu)

   453

        self._init_coll_ContextualMenu_Items(self.ContextualMenu)

   454

   455

    def _init_Editor(self, prnt):

   456

        self.Editor = wx.ScrolledWindow(prnt, name="Viewer", 

   457

            pos=wx.Point(0, 0), size=wx.Size(0, 0), 

   458

            style=wx.HSCROLL | wx.VSCROLL | wx.ALWAYS_SHOW_SB)

   459

   460

    # Create a new Viewer

   461

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

   462

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

   463

   464

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

   465

        DebugViewer.__init__(self, controler, debug)

   466

   467

        self._init_menus()

   468

   469

        # Adding a rubberband to Viewer

   470

        self.rubberBand = RubberBand(viewer=self)

   471

        self.Editor.SetBackgroundColour(wx.Colour(255,255,255))

   472

        self.Editor.SetBackgroundStyle(wx.BG_STYLE_CUSTOM)

   473

        self.ResetView()

   474

        self.Scaling = None

   475

        self.DrawGrid = True

   476

        self.GridBrush = wx.TRANSPARENT_BRUSH

   477

        self.PageSize = None

   478

        self.PagePen = wx.TRANSPARENT_PEN

   479

        self.DrawingWire = False

   480

        self.current_id = 0

   481

        self.TagName = tagname

   482

        self.Highlights = []

   483

        self.InstancePath = instancepath

   484

        self.StartMousePos = None

   485

        self.StartScreenPos = None

   486

   487

        # Initialize Cursors

   488

        ResetCursors()