#!/usr/bin/env python

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

# This file is part of Beremiz

# Copyright (C) 2019: Edouard TISSERANT

#

# See COPYING file for copyrights details.

from __future__ import absolute_import

import os

import shutil

from itertools import izip, imap

from pprint import pprint, pformat

import hashlib

import wx

import util.paths as paths

from POULibrary import POULibrary

from docutil import open_svg, get_inkscape_path

from lxml import etree

from util.ProcessLogger import ProcessLogger

from runtime.typemapping import DebugTypesSize

import targets

HMI_TYPES_DESC = {

"HMI_CLASS":{},

"HMI_LABEL":{},

"HMI_STRING":{},

"HMI_INT":{},

"HMI_REAL":{}

}

HMI_TYPES = HMI_TYPES_DESC.keys()

from XSLTransform import XSLTransform

ScriptDirectory = paths.AbsDir(__file__)

class HMITreeNode(object):

def __init__(self, path, name, nodetype, iectype = None, vartype = None):

self.path = path

self.name = name

self.nodetype = nodetype

if iectype is not None:

self.iectype = iectype

self.vartype = vartype

if nodetype in ["HMI_LABEL", "HMI_ROOT"]:

self.children = []

def pprint(self, indent = 0):

res = ">"*indent + pformat(self.__dict__, indent = indent, depth = 1) + "\n"

if hasattr(self, "children"):

res += "\n".join([child.pprint(indent = indent + 1)

for child in self.children])

res += "\n"

return res

def place_node(self, node):

best_child = None

known_best_match = 0

for child in self.children :

if child.path is not None:

in_common = 0

for child_path_item, node_path_item in izip(child.path, node.path):

if child_path_item == node_path_item:

in_common +=1

else:

break

if in_common > known_best_match:

known_best_match = in_common

best_child = child

if best_child is not None and best_child.nodetype == "HMI_LABEL":

best_child.place_node(node)

else:

self.children.append(node)

def etree(self, add_hash=False):

attribs = dict(name=self.name)

if self.path is not None:

attribs["path"] = ".".join(self.path)

if add_hash:

attribs["hash"] = ",".join(map(str,self.hash()))

res = etree.Element(self.nodetype, **attribs)

if hasattr(self, "children"):

for child_etree in imap(lambda c:c.etree(), self.children):

res.append(child_etree)

return res

def traverse(self):

yield self

if hasattr(self, "children"):

for c in self.children:

for yoodl in c.traverse():

yield yoodl

def hash(self):

""" Produce a hash, any change in HMI tree structure change that hash """

s = hashlib.new('md5')

self._hash(s)

# limit size to HMI_HASH_SIZE as in svghmi.c

return map(ord,s.digest())[:8]

def _hash(self, s):

s.update(str((self.name,self.nodetype)))

if hasattr(self, "children"):

for c in self.children:

c._hash(s)

# module scope for HMITree root

# so that CTN can use HMITree deduced in Library

# note: this only works because library's Generate_C is

# systematicaly invoked before CTN's CTNGenerate_C

hmi_tree_root = None

class SVGHMILibrary(POULibrary):

def GetLibraryPath(self):

return paths.AbsNeighbourFile(__file__, "pous.xml")

def Generate_C(self, buildpath, varlist, IECCFLAGS):

global hmi_tree_root, hmi_tree_unique_id

"""

PLC Instance Tree:

prog0

+->v1 HMI_INT

+->v2 HMI_INT

+->fb0 (type mhoo)

| +->va HMI_LABEL

| +->v3 HMI_INT

| +->v4 HMI_INT

|

+->fb1 (type mhoo)

| +->va HMI_LABEL

| +->v3 HMI_INT

| +->v4 HMI_INT

|

+->fb2

+->v5 HMI_IN

HMI tree:

hmi0

+->v1

+->v2

+->fb0_va

| +-> v3

| +-> v4

|

+->fb1_va

| +-> v3

| +-> v4

|

+->v5

"""

# Filter known HMI types

hmi_types_instances = [v for v in varlist if v["derived"] in HMI_TYPES]

hmi_tree_root = HMITreeNode(None, "/", "HMI_ROOT")

# add special nodes

map(lambda (n,t): hmi_tree_root.children.append(HMITreeNode(None,n,t)), [

("plc_status", "HMI_PLC_STATUS"),

("current_page", "HMI_CURRENT_PAGE")])

# deduce HMI tree from PLC HMI_* instances

for v in hmi_types_instances:

path = v["C_path"].split(".")

# ignores variables starting with _TMP_

if path[-1].startswith("_TMP_"):

continue

new_node = HMITreeNode(path, path[-1], v["derived"], v["type"], v["vartype"])

hmi_tree_root.place_node(new_node)

variable_decl_array = []

extern_variables_declarations = []

buf_index = 0

item_count = 0

for node in hmi_tree_root.traverse():

if hasattr(node, "iectype") and \

node.nodetype not in ["HMI_CLASS", "HMI_LABEL"]:

sz = DebugTypesSize.get(node.iectype, 0)

variable_decl_array += [

"{&(" + ".".join(node.path) + "), " + node.iectype + {

"EXT": "_P_ENUM",

"IN": "_P_ENUM",

"MEM": "_O_ENUM",

"OUT": "_O_ENUM",

"VAR": "_ENUM"

}[node.vartype] + ", " +

str(buf_index) + ", 0, }"]

buf_index += sz

item_count += 1

if len(node.path) == 1:

extern_variables_declarations += [

"extern __IEC_" + node.iectype + "_" +

"t" if node.vartype is "VAR" else "p"

+ ".".join(node.path) + ";"]

# TODO : filter only requiered external declarations

for v in varlist :

if v["C_path"].find('.') < 0 and v["vartype"] == "FB" :

extern_variables_declarations += [

"extern %(type)s %(C_path)s;" % v]

# TODO check if programs need to be declared separately

# "programs_declarations": "\n".join(["extern %(type)s %(C_path)s;" %

# p for p in self._ProgramList]),

# C code to observe/access HMI tree variables

svghmi_c_filepath = paths.AbsNeighbourFile(__file__, "svghmi.c")

svghmi_c_file = open(svghmi_c_filepath, 'r')

svghmi_c_code = svghmi_c_file.read()

svghmi_c_file.close()

svghmi_c_code = svghmi_c_code % {

"variable_decl_array": ",\n".join(variable_decl_array),

"extern_variables_declarations": "\n".join(extern_variables_declarations),

"buffer_size": buf_index,

"item_count": item_count,

"var_access_code": targets.GetCode("var_access.c"),

"PLC_ticktime": self.GetCTR().GetTicktime(),

"hmi_hash_ints": ",".join(map(str,hmi_tree_root.hash()))

}

gen_svghmi_c_path = os.path.join(buildpath, "svghmi.c")

gen_svghmi_c = open(gen_svghmi_c_path, 'w')

gen_svghmi_c.write(svghmi_c_code)

gen_svghmi_c.close()

# Python based WebSocket HMITree Server

svghmiserverfile = open(paths.AbsNeighbourFile(__file__, "svghmi_server.py"), 'r')

svghmiservercode = svghmiserverfile.read()

svghmiserverfile.close()

runtimefile_path = os.path.join(buildpath, "runtime_svghmi.py")

runtimefile = open(runtimefile_path, 'w')

runtimefile.write(svghmiservercode)

runtimefile.close()

return ((["svghmi"], [(gen_svghmi_c_path, IECCFLAGS)], True), "",

("runtime_svghmi0.py", open(runtimefile_path, "rb")))

class SVGHMI(object):

XSD = """<?xml version="1.0" encoding="utf-8" ?>

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

<xsd:element name="SVGHMI">

<xsd:complexType>

<xsd:attribute name="enableHTTP" type="xsd:boolean" use="optional" default="false"/>

<xsd:attribute name="bindAddress" type="xsd:string" use="optional" default="localhost"/>

<xsd:attribute name="port" type="xsd:string" use="optional" default="8080"/>

</xsd:complexType>

</xsd:element>

</xsd:schema>

"""

# TODO : add comma separated supported language list

ConfNodeMethods = [

{

"bitmap": "ImportSVG",

"name": _("Import SVG"),

"tooltip": _("Import SVG"),

"method": "_ImportSVG"

},

{

"bitmap": "ImportSVG", # should be something different

"name": _("Inkscape"),

"tooltip": _("Edit HMI"),

"method": "_StartInkscape"

},

# TODO : Launch POEdit button

# PO -> SVG layers button

# SVG layers -> PO

# TODO : HMITree button

# - can drag'n'drop variabes to Inkscape

]

def _getSVGpath(self, project_path=None):

if project_path is None:

project_path = self.CTNPath()

return os.path.join(project_path, "svghmi.svg")

def OnCTNSave(self, from_project_path=None):

if from_project_path is not None:

shutil.copyfile(self._getSVGpath(from_project_path),

self._getSVGpath())

return True

def GetSVGGeometry(self):

# invoke inskscape -S, csv-parse output, produce elements

InkscapeGeomColumns = ["Id", "x", "y", "w", "h"]

inkpath = get_inkscape_path()

svgpath = self._getSVGpath()

_status, result, _err_result = ProcessLogger(None,

inkpath + " -S " + svgpath,

no_stdout=True,

no_stderr=True).spin()

res = []

for line in result.split():

strippedline = line.strip()

attrs = dict(

zip(InkscapeGeomColumns, line.strip().split(',')))

res.append(etree.Element("bbox", **attrs))

return res

def GetHMITree(self):

global hmi_tree_root

res = [hmi_tree_root.etree(add_hash=True)]

return res

def CTNGenerate_C(self, buildpath, locations):

"""

Return C code generated by iec2c compiler

when _generate_softPLC have been called

@param locations: ignored

@return: [(C_file_name, CFLAGS),...] , LDFLAGS_TO_APPEND

"""

location_str = "_".join(map(str, self.GetCurrentLocation()))

view_name = self.BaseParams.getName()

svgfile = self._getSVGpath()

res = ([], "", False)

target_fname = "sghmi_"+location_str+".xhtml"

target_path = os.path.join(self._getBuildPath(), target_fname)

target_file = open(target_path, 'w')

if os.path.exists(svgfile):

# TODO : move to __init__

transform = XSLTransform(os.path.join(ScriptDirectory, "gen_index_xhtml.xslt"),

[("GetSVGGeometry", lambda *_ignored:self.GetSVGGeometry()),

("GetHMITree", lambda *_ignored:self.GetHMITree())])

# load svg as a DOM with Etree

svgdom = etree.parse(svgfile)

# call xslt transform on Inkscape's SVG to generate XHTML

result = transform.transform(svgdom)

result.write(target_file, encoding="utf-8")

# print(str(result))

# print(transform.xslt.error_log)

# TODO

# - Errors on HMI semantics

# - ... maybe something to have a global view of what is declared in SVG.

else:

# TODO : use default svg that expose the HMI tree as-is

target_file.write("""<!DOCTYPE html>

<html>

<body>

<h1> No SVG file provided </h1>

</body>

</html>

""")

target_file.close()

res += ((target_fname, open(target_path, "rb")),)

runtimefile_path = os.path.join(buildpath, "runtime_svghmi1_%s.py" % location_str)

runtimefile = open(runtimefile_path, 'w')

runtimefile.write("""

def _runtime_svghmi1_%(location)s_start():

svghmi_root.putChild('%(view_name)s',File('%(xhtml)s'))

def _runtime_svghmi1_%(location)s_stop():

svghmi_root.delEntity('%(view_name)s')

""" % {"location": location_str,

"xhtml": target_fname,

"view_name": view_name})

runtimefile.close()

res += (("runtime_svghmi1_%s.py" % location_str, open(runtimefile_path, "rb")),)

return res

def _ImportSVG(self):

dialog = wx.FileDialog(self.GetCTRoot().AppFrame, _("Choose a SVG file"), os.getcwd(), "", _("SVG files (*.svg)|*.svg|All files|*.*"), wx.OPEN)

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

svgpath = dialog.GetPath()

if os.path.isfile(svgpath):

shutil.copy(svgpath, self._getSVGpath())

else:

self.GetCTRoot().logger.write_error(_("No such SVG file: %s\n") % svgpath)

dialog.Destroy()

def _StartInkscape(self):

svgfile = self._getSVGpath()

open_inkscape = True

if not self.GetCTRoot().CheckProjectPathPerm():

dialog = wx.MessageDialog(self.GetCTRoot().AppFrame,

_("You don't have write permissions.\nOpen Inkscape anyway ?"),

_("Open Inkscape"),

wx.YES_NO | wx.ICON_QUESTION)

open_inkscape = dialog.ShowModal() == wx.ID_YES

dialog.Destroy()

if open_inkscape:

if not os.path.isfile(svgfile):

svgfile = None

open_svg(svgfile)