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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 wx

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from GraphicCommons import *

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from plcopen.structures import *

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

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#                         Function Block Diagram Block

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

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"""

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Class that implements the graphic representation of a function block

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"""

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class FBD_Block(Graphic_Element):

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    # Create a new block

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    def __init__(self, parent, type, name, id = None, extension = 0, inputs = None, connectors = {}):

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        Graphic_Element.__init__(self, parent)

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        self.Type = None

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        self.Extension = None

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        self.Name = name

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        self.Id = id

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        self.Inputs = []

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        self.Outputs = []

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        self.RefreshNameSize()

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        self.Colour = wx.BLACK

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        self.Pen = wx.BLACK_PEN

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        self.SetType(type, extension, inputs, connectors)

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    55

    # Destructor

    56

    def __del__(self):

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        self.Inputs = []

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        self.Outputs = []

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    60

    # Delete this block by calling the appropriate method

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    def Delete(self):

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        self.Parent.DeleteBlock(self)

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    # Unconnect all inputs and outputs

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    def Clean(self):

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        for input in self.Inputs:

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            input.UnConnect(delete = True)

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        for output in self.Outputs:

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            output.UnConnect(delete = True)

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    # Refresh the size of text for name

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    def RefreshNameSize(self):

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        dc = wx.ClientDC(self.Parent)

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        self.NameSize = dc.GetTextExtent(self.Name)

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    # Refresh the block bounding box

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    def RefreshBoundingBox(self):

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        # Calculate the size of the name outside the block

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        text_width, text_height = self.NameSize

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        # Calculate the bounding box size

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        bbx_x = self.Pos.x - max(min(1, len(self.Inputs)) * CONNECTOR_SIZE, (text_width - self.Size[0]) / 2)

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        bbx_width = self.Size[0] + 1 + (min(1, len(self.Inputs)) + min(1, len(self.Outputs))) * CONNECTOR_SIZE

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        if self.Name != "":

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            bbx_y = self.Pos.y - (text_height + 2)

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            bbx_height = self.Size[1] + (text_height + 2)

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        else:

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            bbx_y = self.Pos.y

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            bbx_height = self.Size[1]

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        self.BoundingBox = wx.Rect(bbx_x, bbx_y, bbx_width + 1, bbx_height + 1)

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    # Refresh the positions of the block connectors

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    def RefreshConnectors(self):

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        # Calculate the size for the connector lines

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        lines = max(len(self.Inputs), len(self.Outputs))

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        linesize = max((self.Size[1] - BLOCK_LINE_SIZE) / lines, BLOCK_LINE_SIZE)

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        # Update inputs positions

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        position = BLOCK_LINE_SIZE + linesize / 2

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        for input in self.Inputs:

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            input.SetPosition(wx.Point(0, position))

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            position += linesize

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        # Update outputs positions

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        position = BLOCK_LINE_SIZE + linesize / 2

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        for output in self.Outputs:

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            output.SetPosition(wx.Point(self.Size[0], position))

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            position += linesize

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        self.RefreshConnected()

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    # Refresh the positions of wires connected to inputs and outputs

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    def RefreshConnected(self, exclude = []):

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        for input in self.Inputs:

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            input.MoveConnected(exclude)

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        for output in self.Outputs:

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            output.MoveConnected(exclude)

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    # Returns the block connector that starts with the point given if it exists 

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    def GetConnector(self, position, name = None):

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        # if a name is given

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        if name:

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            # Test each input and output connector

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            for input in self.Inputs:

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                if name == input.GetName():

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                    return input

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            for output in self.Outputs:

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                if name == output.GetName():

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                    return output

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        # Test each input connector

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        for input in self.Inputs:

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            input_pos = input.GetRelPosition()

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            if position.x == self.Pos.x + input_pos.x and position.y == self.Pos.y + input_pos.y:

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                return input

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        # Test each output connector

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        for output in self.Outputs:

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            output_pos = output.GetRelPosition()

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            if position.x == self.Pos.x + output_pos.x and position.y == self.Pos.y + output_pos.y:

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                return output

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        return None

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    def GetInputTypes(self):

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        return tuple([input.GetType() for input in self.Inputs])

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    # Returns all the block connectors 

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    def GetConnectors(self):

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        return {"inputs" : self.Inputs, "outputs" : self.Outputs}

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    # Test if point given is on one of the block connectors

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    def TestConnector(self, pt, exclude = True):

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        # Test each input connector

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        for input in self.Inputs:

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            if input.TestPoint(pt, exclude):

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                return input

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        # Test each output connector

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        for output in self.Outputs:

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            if output.TestPoint(pt, exclude):

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                return output

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        return None

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    # Changes the block type

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    def SetType(self, type, extension, inputs = None, connectors = {}):

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        if type != self.Type or self.Extension != extension: 

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            if type != self.Type:

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                self.Type = type

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                dc = wx.ClientDC(self.Parent)

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                self.TypeSize = dc.GetTextExtent(self.Type)

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            self.Extension = extension

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            # Find the block definition from type given and create the corresponding

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            # inputs and outputs

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            blocktype = GetBlockType(type, inputs)

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            if blocktype:

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                self.Colour = wx.BLACK

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                inputs = [input for input in blocktype["inputs"]]

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                outputs = [output for output in blocktype["outputs"]]

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                if blocktype["extensible"]:

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                    start = int(inputs[-1][0].replace("IN", ""))

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                    for i in xrange(self.Extension - len(blocktype["inputs"])):

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                        start += 1

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                        inputs.append(("IN%d"%start, inputs[-1][1], inputs[-1][2]))

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            else:

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                self.Colour = wx.RED

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                if "inputs" in connectors:

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                    inputs = connectors["inputs"]

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                else:

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                    inputs = []

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                if "outputs" in connectors:

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                    outputs = connectors["outputs"]

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                else:

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                    outputs = []

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            self.Pen = wx.Pen(self.Colour)

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            self.Clean()

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            # Extract the inputs properties and create the corresponding connector

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            self.Inputs = []

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            for input_name, input_type, input_modifier in inputs:

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                connector = Connector(self, input_name, input_type, wx.Point(0, 0), WEST, onlyone = True)

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                if input_modifier == "negated":

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                    connector.SetNegated(True)

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                elif input_modifier != "none":

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                    connector.SetEdge(input_modifier)

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                self.Inputs.append(connector)

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            # Extract the outputs properties and create the corresponding connector

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            self.Outputs = []

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            for output_name, output_type, output_modifier in outputs:

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                connector = Connector(self, output_name, output_type, wx.Point(0, 0), EAST)

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                if output_modifier == "negated":

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                    connector.SetNegated(True)

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                elif output_modifier != "none":

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                    connector.SetEdge(output_modifier)

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                self.Outputs.append(connector)

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            self.RefreshMinSize()

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            self.RefreshConnectors()

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            self.RefreshBoundingBox()

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    # Returns the block type

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    def GetType(self):

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        return self.Type

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    # Changes the block name

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    def SetName(self, name):

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        self.Name = name

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        self.RefreshNameSize()

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    # Returs the block name

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    def GetName(self):

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        return self.Name

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    # Changes the extension name

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    def SetExtension(self, extension):

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        self.Extension = extension

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    # Returs the extension name

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    def GetExtension(self):

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        return self.Extension

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    # Refresh the block minimum size

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    def RefreshMinSize(self):

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        # Calculate the inputs maximum width

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        max_input = 0

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        for input in self.Inputs:

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            w, h = input.GetNameSize()

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            max_input = max(max_input, w)

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        # Calculate the outputs maximum width

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        max_output = 0

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        for output in self.Outputs:

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            w, h = output.GetNameSize()

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            max_output = max(max_output, w)

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        width = max(self.TypeSize[0] + 10, max_input + max_output + 15)

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        height = (max(len(self.Inputs), len(self.Outputs)) + 1) * BLOCK_LINE_SIZE

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        self.MinSize = width, height

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    # Returns the block minimum size

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    def GetMinSize(self):

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        return self.MinSize

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    # Changes the negated property of the connector handled

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    def SetConnectorNegated(self, negated):

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        handle_type, handle = self.Handle

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        if handle_type == HANDLE_CONNECTOR:

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            handle.SetNegated(negated)

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            self.RefreshModel(False)

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    # Changes the edge property of the connector handled

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    def SetConnectorEdge(self, edge):

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        handle_type, handle = self.Handle

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        if handle_type == HANDLE_CONNECTOR:

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            handle.SetEdge(edge)

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            self.RefreshModel(False)

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    # Method called when a LeftDClick event have been generated

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    def OnLeftDClick(self, event, dc, scaling):

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        # Edit the block properties

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        self.Parent.EditBlockContent(self)

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    # Method called when a RightUp event have been generated

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    def OnRightUp(self, event, dc, scaling):

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        pos = GetScaledEventPosition(event, dc, scaling)

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        # Popup the menu with special items for a block and a connector if one is handled

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        connector = self.TestConnector(pos, False)

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        if connector:

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            self.Handle = (HANDLE_CONNECTOR, connector)

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            self.Parent.PopupBlockMenu(connector)

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        else:

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            self.Parent.PopupBlockMenu()

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    # Refreshes the block model

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    def RefreshModel(self, move=True):

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        self.Parent.RefreshBlockModel(self)

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        # If block has moved, refresh the model of wires connected to outputs

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        if move:

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            for output in self.Outputs:

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                output.RefreshWires()

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    # Draws block

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    def Draw(self, dc):

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        dc.SetPen(self.Pen)

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        dc.SetBrush(wx.WHITE_BRUSH)

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        dc.SetTextForeground(self.Colour)

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        # Draw a rectangle with the block size

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        dc.DrawRectangle(self.Pos.x, self.Pos.y, self.Size[0] + 1, self.Size[1] + 1)

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        # Draw block name and block type

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        dc.DrawText(self.Name, self.Pos.x + (self.Size[0] - self.NameSize[0]) / 2,

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                self.Pos.y - (self.NameSize[1] + 2))

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        dc.DrawText(self.Type, self.Pos.x + (self.Size[0] - self.TypeSize[0]) / 2,

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                self.Pos.y + 5)

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        # Draw inputs and outputs connectors

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        for input in self.Inputs:

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            input.Draw(dc)

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        for output in self.Outputs:

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            output.Draw(dc)

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        Graphic_Element.Draw(self, dc)

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        dc.SetTextForeground(wx.BLACK)

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

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#                        Function Block Diagram Variable

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

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"""

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Class that implements the graphic representation of a variable

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"""

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class FBD_Variable(Graphic_Element):

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    # Create a new variable

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    def __init__(self, parent, type, name, value_type, id = None):

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        Graphic_Element.__init__(self, parent)

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        self.Type = None

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        self.ValueType = None

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        self.Name = name

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        self.Id = id

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        self.Input = None

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        self.Output = None

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        self.RefreshNameSize()

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        self.SetType(type, value_type)

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   349

    # Destructor

   350

    def __del__(self):

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        self.Input = None

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        self.Output = None

   353

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    # Unconnect connector

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    def Clean(self):

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        if self.Input:

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            self.Input.UnConnect(delete = True)

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        if self.Output:

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            self.Output.UnConnect(delete = True)

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    # Delete this variable by calling the appropriate method

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    def Delete(self):

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        self.Parent.DeleteVariable(self)

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   365

    # Refresh the size of text for name

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    def RefreshNameSize(self):

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        dc = wx.ClientDC(self.Parent)

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        self.NameSize = dc.GetTextExtent(self.Name)

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    # Refresh the variable bounding box

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    def RefreshBoundingBox(self):

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        if self.Type in (OUTPUT, INOUT):

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            bbx_x = self.Pos.x - CONNECTOR_SIZE

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        else:

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            bbx_x = self.Pos.x

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        if self.Type == INOUT:

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            bbx_width = self.Size[0] + 2 * CONNECTOR_SIZE

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        else:

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            bbx_width = self.Size[0] + CONNECTOR_SIZE

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        self.BoundingBox = wx.Rect(bbx_x, self.Pos.y, bbx_width + 1, self.Size[1] + 1)

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    # Refresh the position of the variable connector

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    def RefreshConnectors(self):

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        if self.Input:

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            self.Input.SetPosition(wx.Point(0, self.Size[1] / 2))

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        if self.Output:

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            self.Output.SetPosition(wx.Point(self.Size[0], self.Size[1] / 2))

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        self.RefreshConnected()

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   390

    # Refresh the position of wires connected to connector

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    def RefreshConnected(self, exclude = []):

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        if self.Input:

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            self.Input.MoveConnected(exclude)

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        if self.Output:

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            self.Output.MoveConnected(exclude)

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   397

    # Test if point given is on the variable connector

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    def TestConnector(self, pt, exclude=True):

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        if self.Input and self.Input.TestPoint(pt, exclude):

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            return self.Input

   401

        if self.Output and self.Output.TestPoint(pt, exclude):

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            return self.Output

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        return None

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    # Returns the block connector that starts with the point given if it exists 

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    def GetConnector(self, position, name = None):

   407

        # if a name is given

   408

        if name:

   409

            # Test input and output connector if they exists

   410

            if self.Input and name == self.Input.GetName():

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                return self.Input

   412

            if self.Output and name == self.Output.GetName():

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                return self.Output

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        # Test input connector if it exists

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        if self.Input:

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            input_pos = self.Input.GetRelPosition()

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            if position.x == self.Pos.x + input_pos.x and position.y == self.Pos.y + input_pos.y:

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                return self.Input

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        # Test output connector if it exists

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        if self.Output:

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            output_pos = self.Output.GetRelPosition()

   422

            if position.x == self.Pos.x + output_pos.x and position.y == self.Pos.y + output_pos.y:

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                return self.Output

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        return None

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    # Returns all the block connectors 

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    def GetConnectors(self):

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        return {"input" : self.Input, "output" : self.Output}

   429

   430

    # Changes the negated property of the variable connector if handled

   431

    def SetConnectorNegated(self, negated):

   432

        handle_type, handle = self.Handle

   433

        if handle_type == HANDLE_CONNECTOR:

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            handle.SetNegated(negated)

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            self.RefreshModel(False)

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   437

    # Changes the variable type

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    def SetType(self, type, value_type):

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        if type != self.Type:

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            self.Type = type

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            self.Clean()

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            self.Input = None

   443

            self.Output = None

   444

            # Create an input or output connector according to variable type

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            if self.Type != INPUT:

   446

                self.Input = Connector(self, "", value_type, wx.Point(0, 0), WEST, onlyone = True)

   447

            if self.Type != OUTPUT:

   448

                self.Output = Connector(self, "", value_type, wx.Point(0, 0), EAST)

   449

            self.RefreshConnectors()

   450

        elif value_type != self.ValueType:

   451

            if self.Input:

   452

                self.Input.SetType(value_type)

   453

            if self.Output:

   454

                self.Output.SetType(value_type)            

   455

        self.RefreshConnectors()

   456

   457

    # Returns the variable type

   458

    def GetType(self):

   459

        return self.Type

   460

   461

    # Changes the variable name

   462

    def SetName(self, name):

   463

        self.Name = name

   464

        self.RefreshNameSize()

   465

   466

    # Returns the variable name

   467

    def GetName(self):

   468

        return self.Name

   469

   470

    # Returns the variable minimum size

   471

    def GetMinSize(self):

   472

        return self.NameSize[0] + 10, self.NameSize[1] + 10

   473

   474

    # Method called when a LeftDClick event have been generated

   475

    def OnLeftDClick(self, event, dc, scaling):

   476

        # Edit the variable properties

   477

        self.Parent.EditVariableContent(self)

   478

   479

    # Method called when a RightUp event have been generated

   480

    def OnRightUp(self, event, dc, scaling):

   481

        pos = GetScaledEventPosition(event, dc, scaling)

   482

        # Popup the menu with special items for a variable and a connector if it's handled

   483

        connector = self.TestConnector(pos, False)

   484

        if connector:

   485

            self.Handle = (HANDLE_CONNECTOR, connector)

   486

            self.Parent.PopupVariableMenu(connector)

   487

        else:

   488

            self.Parent.PopupVariableMenu()

   489

   490

    # Refreshes the variable model

   491

    def RefreshModel(self, move=True):

   492

        self.Parent.RefreshVariableModel(self)

   493

        # If variable has moved and variable is not of type OUTPUT, refresh the model

   494

        # of wires connected to output connector

   495

        if move and self.Type != OUTPUT:

   496

            if self.Output:

   497

                self.Output.RefreshWires()

   498

   499

    # Draws variable

   500

    def Draw(self, dc):

   501

        dc.SetPen(wx.BLACK_PEN)

   502

        dc.SetBrush(wx.WHITE_BRUSH)

   503

        # Draw a rectangle with the variable size

   504

        dc.DrawRectangle(self.Pos.x, self.Pos.y, self.Size[0] + 1, self.Size[1] + 1)

   505

        # Draw variable name

   506

        dc.DrawText(self.Name, self.Pos.x + (self.Size[0] - self.NameSize[0]) / 2,

   507

                self.Pos.y + (self.Size[1] - self.NameSize[1]) / 2)