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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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import wx

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if wx.VERSION >= (2, 8, 0):

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    USE_AUI = True

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else:

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    USE_AUI = False

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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 types import TupleType

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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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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' : 20,

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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' : 20,

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             }

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

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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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        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", "program"]:

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                name, type = self.ParentWindow.Controler.GetEditedElementType(self.ParentWindow.GetTagName(), self.ParentWindow.Debug)

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

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                if name == values[0]:

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                    message = "\"%s\" can't use itself!"%name

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                elif 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(name, values[0], self.ParentWindow.Debug):

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                    message = "\"%s\" is already used by \"%s\"!"%(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(self.ParentWindow.GetTagName(), 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(self.ParentWindow.GetTagName(), 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.ParentWindow.RefreshVariablePanel(self.ParentWindow.GetTagName())

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                        self.ParentWindow.Refresh(False)

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            elif values[1] != "location":

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                tagname = self.ParentWindow.GetTagName()

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                if 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.AddParentVariableBlock(x, y, scaling, var_class, values[0], values[2])

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                    else:

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                        message = "Unknown variable \"%s\" 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.AddParentVariableBlock(x, y, scaling, var_class, var_name, var_type)

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        return AddVariableFunction

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

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        id = self.ParentWindow.GetNewId()

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        variable = FBD_Variable(self.ParentWindow, var_class, var_name, var_type, id)

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        width, height = variable.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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        variable.SetPosition(x, y)

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        variable.SetSize(width, height)

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        self.ParentWindow.AddBlock(variable)

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        self.ParentWindow.Controler.AddEditedElementVariable(self.ParentWindow.GetTagName(), id, var_class)

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        self.ParentWindow.RefreshVariableModel(variable)

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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.Refresh(False)

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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(wx.ScrolledWindow):

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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)

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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')

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        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')

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

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

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        parent.AppendSeparator()

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

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

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

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

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        parent.AppendSeparator()

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

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

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

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

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        parent.AppendSeparator()

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

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

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

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

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        parent.AppendSeparator()

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

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        parent.AppendSeparator()

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

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

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

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

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        # Link menu event to corresponding called functions

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

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              id=ID_VIEWERCONTEXTUALMENUITEMS0)

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

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              id=ID_VIEWERCONTEXTUALMENUITEMS1)

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

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              id=ID_VIEWERCONTEXTUALMENUITEMS2)

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

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              id=ID_VIEWERCONTEXTUALMENUITEMS3)

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

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              id=ID_VIEWERCONTEXTUALMENUITEMS5)

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

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              id=ID_VIEWERCONTEXTUALMENUITEMS6)

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

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              id=ID_VIEWERCONTEXTUALMENUITEMS8)

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

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              id=ID_VIEWERCONTEXTUALMENUITEMS9)

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

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              id=ID_VIEWERCONTEXTUALMENUITEMS11)

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

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              id=ID_VIEWERCONTEXTUALMENUITEMS12)

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

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              id=ID_VIEWERCONTEXTUALMENUITEMS16)

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

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              id=ID_VIEWERCONTEXTUALMENUITEMS17)

   334

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    # Create and initialize Contextual Menu

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    def _init_menus(self):

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

   338

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

   339

   340

        self._init_coll_AlignmentMenu_Items(self.AlignmentMenu)

   341

        self._init_coll_ContextualMenu_Items(self.ContextualMenu)

   342

   343

    # Create a new Viewer

   344

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

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        wx.ScrolledWindow.__init__(self, parent, pos=wx.Point(0, 0), size=wx.Size(0, 0), 

   346

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

   347

        self._init_menus()

   348

        # Adding a rubberband to Viewer

   349

        self.rubberBand = RubberBand(drawingSurface=self)

   350

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

   351

        self.SetBackgroundStyle(wx.BG_STYLE_CUSTOM)

   352

        self.ResetView()

   353

        self.Scaling = None

   354

        self.DrawGrid = True

   355

        self.GridBrush = wx.TRANSPARENT_BRUSH

   356

        self.PageSize = None

   357

        self.PagePen = wx.TRANSPARENT_PEN

   358

        self.DrawingWire = False

   359

        self.current_id = 0

   360

        self.TagName = tagname

   361

        self.Errors = []

   362

        self.Debug = debug

   363

        self.InstancePath = instancepath

   364

        self.StartMousePos = None

   365

        self.StartScreenPos = None

   366

   367

        # Initialize Block, Wire and Comment numbers

   368

        self.block_id = self.wire_id = self.comment_id = 0

   369

   370

        # Initialize Viewer mode to Selection mode

   371

        self.Mode = MODE_SELECTION

   372

        self.SavedMode = False

   373

        self.CurrentLanguage = "FBD"

   374

   375

        self.ParentWindow = window

   376

        self.Controler = controler

   377

   378

        if not self.Debug:

   379

            self.SetDropTarget(ViewerDropTarget(self))

   380

   381

        dc = wx.ClientDC(self)

   382

        font = wx.Font(faces["size"], wx.SWISS, wx.NORMAL, wx.NORMAL, faceName = faces["mono"])

   383

        dc.SetFont(font)

   384

        width, height = dc.GetTextExtent("ABCDEFGHIJKLMNOPQRSTUVWXYZ")

   385

        while width > 260:

   386

            faces["size"] -= 1

   387

            font = wx.Font(faces["size"], wx.SWISS, wx.NORMAL, wx.NORMAL, faceName = faces["mono"])

   388

            dc.SetFont(font)

   389

            width, height = dc.GetTextExtent("ABCDEFGHIJKLMNOPQRSTUVWXYZ")

   390

        self.SetFont(font)

   391

   392

        self.SetScale(len(ZOOM_FACTORS) / 2)

   393

   394

        self.ResetView()

   395

   396

        # Link Viewer event to corresponding methods

   397

        self.Bind(wx.EVT_PAINT, self.OnPaint)

   398

        self.Bind(wx.EVT_LEFT_DOWN, self.OnViewerLeftDown)

   399

        self.Bind(wx.EVT_LEFT_UP, self.OnViewerLeftUp)

   400

        self.Bind(wx.EVT_LEFT_DCLICK, self.OnViewerLeftDClick)

   401

        self.Bind(wx.EVT_RIGHT_DOWN, self.OnViewerRightDown)

   402

        self.Bind(wx.EVT_RIGHT_UP, self.OnViewerRightUp)

   403

        self.Bind(wx.EVT_MIDDLE_DOWN, self.OnViewerMiddleDown)

   404

        self.Bind(wx.EVT_MIDDLE_UP, self.OnViewerMiddleUp)

   405

        self.Bind(wx.EVT_LEAVE_WINDOW, self.OnLeaveViewer)

   406

        self.Bind(wx.EVT_MOTION, self.OnViewerMotion)

   407

        self.Bind(wx.EVT_CHAR, self.OnChar)

   408

        self.Bind(wx.EVT_SCROLLWIN, self.OnScrollWindow)

   409

        self.Bind(wx.EVT_SCROLLWIN_THUMBRELEASE, self.OnScrollStop)

   410

        self.Bind(wx.EVT_MOUSEWHEEL, self.OnMouseWheelWindow)

   411

        self.Bind(wx.EVT_SIZE, self.OnMoveWindow)

   412

   413

    def GetScrolledRect(self, rect):

   414

        rect.x, rect.y = self.CalcScrolledPosition(int(rect.x * self.ViewScale[0]), 

   415

                                                   int(rect.y * self.ViewScale[1]))

   416

        rect.width = int(rect.width * self.ViewScale[0]) + 2

   417

        rect.height = int(rect.height * self.ViewScale[1]) + 2

   418

        return rect

   419

   420

    def GetScaling(self):

   421

        return self.Scaling

   422

   423

    def SetTagName(self, tagname):

   424

        self.TagName = tagname

   425

   426

    def GetTagName(self):

   427

        return self.TagName

   428

   429

    def GetInstancePath(self):

   430

        return self.InstancePath

   431

   432

    def IsViewing(self, tagname):

   433

        if self.Debug:

   434

            return self.InstancePath == tagname

   435

        else:

   436

            return self.TagName == tagname

   437

   438

    # Returns a new id

   439

    def GetNewId(self):

   440

        self.current_id += 1

   441

        return self.current_id

   442

   443

    # Destructor

   444

    def __del__(self):

   445

        self.Flush()

   446

        self.ResetView()

   447

   448

    def SetScale(self, scale_number):

   449

        self.CurrentScale = max(0, min(scale_number, len(ZOOM_FACTORS) - 1))

   450

        self.ViewScale = (ZOOM_FACTORS[self.CurrentScale], ZOOM_FACTORS[self.CurrentScale])

   451

        self.RefreshScaling()

   452

   453

    def GetScale(self):

   454

        return self.CurrentScale

   455

   456

    def GetLogicalDC(self, buffered=False):

   457

        if buffered:

   458

            dc = wx.AutoBufferedPaintDC(self)

   459

        else:

   460

            dc = wx.ClientDC(self)

   461

        dc.SetFont(self.GetFont())

   462

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

   463

            self.DoPrepareDC(dc)

   464

        else:

   465

            self.PrepareDC(dc)

   466

        dc.SetUserScale(self.ViewScale[0], self.ViewScale[1])

   467

        return dc

   468

   469

    def GetMiniFont(self):

   470

        font = self.GetFont()

   471

        return wx.Font(font.GetPointSize() * 0.75, wx.SWISS, wx.NORMAL, wx.NORMAL, faceName = faces["helv"])

   472

   473

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

   474

#                         Element management functions

   475

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

   476

   477

    def AddBlock(self, block):

   478

        self.block_id += 1

   479

        self.Blocks[block] = self.block_id

   480

   481

    def AddWire(self, wire):

   482

        self.wire_id += 1

   483

        self.Wires[wire] = self.wire_id

   484

   485

    def AddComment(self, comment):

   486

        self.comment_id += 1

   487

        self.Comments[comment] = self.comment_id

   488

   489

    def IsBlock(self, block):