import svghmi

from svghmi.svghmi import SVGHMI, SVGHMILibrary, paths

from svghmi import ui

import os

from LPCArch import GetLPCProduct, LOCAL_SVG_modules

# set default values so that COG browser is managed by SVGHMI

SVGHMI.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="OnStart" type="xsd:string" use="optional" default="{LPCBrowserStart}"/>

<xsd:attribute name="OnStop" type="xsd:string" use="optional" default="{LPCBrowserStop}"/>

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

<xsd:attribute name="Rotate180" type="xsd:boolean" use="optional" default="false"/>

<xsd:attribute name="EnableWatchdog" type="xsd:boolean" use="optional" default="true"/>

<xsd:attribute name="OnWatchdog" type="xsd:string" use="optional" default="{LPCBrowserRestart}"/>

<xsd:attribute name="WatchdogInitial" use="optional" default="30">

<xsd:simpleType>

<xsd:restriction base="xsd:integer">

<xsd:minInclusive value="2"/>

<xsd:maxInclusive value="600"/>

</xsd:restriction>

</xsd:simpleType>

</xsd:attribute>

<xsd:attribute name="WatchdogInterval" use="optional" default="10">

<xsd:simpleType>

<xsd:restriction base="xsd:integer">

<xsd:minInclusive value="2"/>

<xsd:maxInclusive value="60"/>

</xsd:restriction>

</xsd:simpleType>

</xsd:attribute>

<xsd:attribute name="Port" type="xsd:integer" use="optional" default="8008"/>

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

<xsd:attribute name="Path" type="xsd:string" use="optional" default="{name}"/>

<xsd:attribute name="MaxConnections" use="optional" default="4">

<xsd:simpleType>

<xsd:restriction base="xsd:integer">

<xsd:minInclusive value="1"/>

<xsd:maxInclusive value="16"/>

</xsd:restriction>

</xsd:simpleType>

</xsd:attribute>

</xsd:complexType>

</xsd:element>

</xsd:schema>

"""

old_get_SVGHMI_options = SVGHMI.get_SVGHMI_options

product = GetLPCProduct()

def get_SVGHMI_options(self):

svghmi_options = old_get_SVGHMI_options(self)

if product in LOCAL_SVG_modules:

portrait = self.GetParamsAttributes("SVGHMI.Portrait")["value"]

rotate180 = self.GetParamsAttributes("SVGHMI.Rotate180")["value"]

eglfs_angle,touch_angle = {

(False,False): ("0","0"),

(False,True): ("90","90"),

(True,False): ("180","180"),

(True,True): ("-90","270")}[(rotate180,portrait)]

# When we were using EVDEV, this was how rotation was done:

# 'QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=rotate=' + touch_angle + \

browser_commandline = ('TSLIB_CONFFILE=/etc/ts_' + touch_angle + ".conf" +

' QT_QPA_EGLFS_ROTATION=' + eglfs_angle +

' qt_webenginewidgets_minimal' +

# JavaScript VM optimization for small memory

' --js-flags="--max_old_space_size=16 --gc_interval=100 --optimize_for_size"' +

# Flags to enable all possible GPU acceleration

' --ignore-gpu-blacklist --enable-gpu-rasterization' +

' --enable-hardware-overlays=single-fullscreen' +

' --enable-gpu-memory-buffer-video-frames' +

' --disable-gpu-sandbox --enable-native-gpu-memory-buffers' +

' --enable-oop-rasterization --enable-zero-copy' +

# Avoid security bloat since serving local HMI

' --single-process' +

' --no-sandbox "' + svghmi_options["url"] + '"')

svghmi_options.update(

{"LPCBrowserStart": "sh -c '"+browser_commandline+"'",

"LPCBrowserStartDebug": "sh -c '"+browser_commandline+" --remote-debugging-port=9988"+"'",

"LPCBrowserStop": "killall qt_webenginewidgets_minimal",

"LPCBrowserRestart": "echo 'Restarting browser'"})

else:

svghmi_options.update(

{"LPCBrowserStart": "",

"LPCBrowserStop": "",

"LPCBrowserRestart": ""})

return svghmi_options

SVGHMI.get_SVGHMI_options = get_SVGHMI_options

def getDefaultSVG(self):

ScriptDirectory = paths.AbsDir(__file__)

portrait = self.GetParamsAttributes("SVGHMI.Portrait")["value"]

return os.path.join(ScriptDirectory, "portrait.svg" if portrait else "landscape.svg")

SVGHMI.getDefaultSVG = getDefaultSVG

def getLPCSVGHMI_dir():

ScriptDirectory = paths.AbsDir(__file__)

return os.path.join(ScriptDirectory, "LPCSVGHMI")

svghmi.svghmi.ScriptDirectory = getLPCSVGHMI_dir()

ui.ScriptDirectory = getLPCSVGHMI_dir()

ui.default_libdir = os.path.join(getLPCSVGHMI_dir(), "widgetlib")

old_Generate_C = SVGHMILibrary.Generate_C

def Generate_C(self, *args, **kwargs):

already_found_browser_launch = False

for CTNChild in self.GetCTR().IterChildren():

if isinstance(CTNChild, SVGHMI):

# spot browser launch abuse

if CTNChild.GetParamsAttributes("SVGHMI.OnStart")["value"].find("{LPCBrowserStart}") >= 0:

if already_found_browser_launch:

self.FatalError("SVGHMI: Only one HMI can launch browser")

already_found_browser_launch = True

return old_Generate_C(self, *args, **kwargs)

SVGHMILibrary.Generate_C = Generate_C