r"""web_helper is a module that provides access to functions that helps to build
new protocols and process ParaView data structure into web friendly ones.
"""
import sys
import os
import traceback
# import paraview modules.
import paraview
from paraview import simple, servermanager
from paraview.servermanager import ProxyProperty
from paraview.modules.vtkRemotingViews import vtkSMPVRepresentationProxy
# =============================================================================
# Pipeline management
# =============================================================================
[docs]class Pipeline:
"""
Define a data structure that represent a pipeline as a tree.
This provide also methods to get the data structure for the web environment
"""
# --------------------------------------------------------------------------
def __init__(self, name):
self.root_node = {"name": name, "icon": "server", "children": []}
self.parent_ids = {"0": "0"}
self.children_ids = {"0": []}
# --------------------------------------------------------------------------
[docs] def clear(self):
"""
Clear the pipeline tree.
"""
self.root_node["children"] = []
self.parent_ids = {"0": "0"}
self.children_ids = {"0": []}
# --------------------------------------------------------------------------
[docs] def addNode(self, parent_id, node_id):
"""
Add node into the pipeline tree.
"""
pid = str(parent_id)
nid = str(node_id)
# Add child
if pid in self.children_ids:
self.children_ids[pid].append(nid)
else:
self.children_ids[pid] = [nid]
# Add parent
self.parent_ids[nid] = pid
# --------------------------------------------------------------------------
[docs] def removeNode(self, id):
"""
Remove a node from the pipeline tree.
"""
nid = str(id)
pid = self.parent_ids[nid]
if pid:
del self.parent_ids[nid]
self.children_ids[pid].remove(nid)
# --------------------------------------------------------------------------
[docs] def isEmpty(self):
return len(self.parent_ids) == 1
# --------------------------------------------------------------------------
[docs] def getRootNode(self, view=None):
"""
Create a tree structure of the pipeline with the current proxy state.
"""
self.root_node["children"] = []
self.__fill_children(self.root_node, self.children_ids["0"], view)
return self.root_node
# --------------------------------------------------------------------------
def __fill_children(self, nodeToFill, childrenIds, view=None):
for id in childrenIds:
node = getProxyAsPipelineNode(id, view)
nid = str(node["proxy_id"])
if "children" in nodeToFill:
nodeToFill["children"].append(node)
else:
nodeToFill["children"] = [node]
if nid in self.children_ids:
self.__fill_children(node, self.children_ids[nid])
# =============================================================================
# Proxy management
# =============================================================================
[docs]def idToProxy(id):
"""
Return the proxy that match the given proxy ID.
"""
remoteObject = simple.servermanager.ActiveConnection.Session.GetRemoteObject(
int(id)
)
if remoteObject:
return simple.servermanager._getPyProxy(remoteObject)
return None
# --------------------------------------------------------------------------
[docs]def getParentProxyId(proxy):
"""
Return '0' if the given proxy has no Input otherwise will return
the parent proxy id as a String.
"""
if proxy and proxy.GetProperty("Input"):
parentProxy = proxy.GetProperty("Input").GetProxy(0)
if parentProxy:
return parentProxy.GetGlobalIDAsString()
return "0"
# --------------------------------------------------------------------------
[docs]def getProxyAsPipelineNode(id, view=None):
"""
Create a representation for that proxy so it can be used within a pipeline
browser.
"""
pxm = servermanager.ProxyManager()
proxy = idToProxy(id)
rep = simple.GetDisplayProperties(proxy)
nbActiveComp = 1
pointData = []
searchArray = ("POINTS" == rep.ColorArrayName[0]) and (
len(rep.ColorArrayName[1]) > 0
)
if servermanager.ActiveConnection.GetNumberOfDataPartitions() > 1:
info = {
"lutId": "vtkProcessId_1",
"name": "vtkProcessId",
"size": 1,
"range": [
0,
servermanager.ActiveConnection.GetNumberOfDataPartitions() - 1,
],
}
pointData.append(info)
# FIXME seb
# dataInfo = rep.GetRepresentedDataInformation()
# pointData = dataInfo.GetPointDataInformation()
# cellData = dataInfo.GetCellDataInformation()
# for idx in pointData.GetNumberOfArrays():
# info = pointData.GetArrayInformation(idx)
# nbComponents = info.GetNumberOfComponents()
# if searchArray and array.Name == rep.ColorArrayName:
# nbActiveComp = nbComponents
# rangeOn = (nbComponents == 3 if -1 else 0)
# info = { \
# 'lutId': info.GetName() + '_' + str(nbComponents), \
# 'name': info.GetName, \
# 'size': nbComponents, \
# 'range': info.GetRange(rangeOn) }
# pointData.append(info)
for array in proxy.GetPointDataInformation():
nbComponents = array.GetNumberOfComponents()
if searchArray and array.Name == rep.ColorArrayName[1]:
nbActiveComp = nbComponents
rangeOn = nbComponents == 1 if 0 else -1
info = {
"lutId": array.Name + "_" + str(nbComponents),
"name": array.Name,
"size": nbComponents,
"range": array.GetRange(rangeOn),
}
pointData.append(info)
cellData = []
searchArray = ("CELLS" == rep.ColorArrayName[0]) and (
len(rep.ColorArrayName[1]) > 0
)
for array in proxy.GetCellDataInformation():
nbComponents = array.GetNumberOfComponents()
if searchArray and array.Name == rep.ColorArrayName[1]:
nbActiveComp = nbComponents
rangeOn = nbComponents == 1 if 0 else -1
info = {
"lutId": array.Name + "_" + str(nbComponents),
"name": array.Name,
"size": nbComponents,
"range": array.GetRange(rangeOn),
}
cellData.append(info)
state = getProxyAsState(proxy.GetGlobalID())
showScalarbar = (
1
if view
and vtkSMPVRepresentationProxy.IsScalarBarVisible(rep.SMProxy, view.SMProxy)
else 0
)
repName = "Hide"
if rep.Visibility == 1:
repName = rep.Representation
return {
"proxy_id": proxy.GetGlobalID(),
"name": pxm.GetProxyName("sources", proxy),
"bounds": proxy.GetDataInformation().GetBounds(),
"pointData": pointData,
"cellData": cellData,
"activeData": str(rep.ColorArrayName[0]) + ":" + str(rep.ColorArrayName[1]),
"diffuseColor": str(rep.DiffuseColor),
"showScalarBar": showScalarbar,
"representation": repName,
"state": state,
"children": [],
}
# --------------------------------------------------------------------------
[docs]def getProxyAsState(id):
"""
Return a json representation of the given proxy state.
Example of the state of the Clip filter
{
proxy_id: 234,
ClipType: {
proxy_id: 235,
Normal: [0,0,1],
Origin: [0,0,0],
InsideOut: 0
}
}
"""
proxy_id = int(id)
proxy = idToProxy(proxy_id)
state = {
"proxy_id": proxy_id,
"type": "proxy",
"domains": getProxyDomains(proxy_id),
}
properties = {}
allowedTypes = [int, float, list, str]
if proxy:
for property in proxy.ListProperties():
propertyName = proxy.GetProperty(property).Name
if propertyName in ["Refresh", "Input"] or propertyName.__contains__(
"Info"
):
continue
data = proxy.GetProperty(property).GetData()
if type(data) in allowedTypes:
properties[propertyName] = data
continue
# Not a simple property
# Need more investigation
prop = proxy.GetProperty(property)
pythonProp = servermanager._wrap_property(proxy, prop)
proxyList = []
try:
proxyList = pythonProp.Available
except:
pass
if len(proxyList) and prop.GetNumberOfProxies() == 1:
listdomain = prop.FindDomain("vtkSMProxyListDomain")
if listdomain:
proxyPropertyValue = prop.GetProxy(0)
for i in range(listdomain.GetNumberOfProxies()):
if listdomain.GetProxy(i) == proxyPropertyValue:
properties[propertyName] = proxyList[i]
# Add selected proxy in list of prop to edit
properties[propertyName + "_internal"] = getProxyAsState(
listdomain.GetProxy(i).GetGlobalID()
)
elif type(prop) == ProxyProperty:
try:
subProxyId = proxy.GetProperty(property).GetData().GetGlobalID()
properties[propertyName] = getProxyAsState(subProxyId)
except:
print("Error on", property, propertyName)
print("Skip property: ", str(type(data)))
print(data)
state["properties"] = properties
return state
# --------------------------------------------------------------------------
[docs]def updateProxyProperties(proxy, properties):
"""
Loop over the properties object and update the mapping properties
to the given proxy.
"""
try:
allowedProperties = proxy.ListProperties()
for key in properties:
validKey = servermanager._make_name_valid(key)
if validKey in allowedProperties:
value = removeUnicode(properties[key])
property = servermanager._wrap_property(
proxy, proxy.GetProperty(validKey)
)
if (
property.FindDomain("vtkSMProxyListDomain")
and len(value) == 1
and type(value[0]) == str
):
try:
idx = property.GetAvailable().index(value[0])
proxyToSet = servermanager._getPyProxy(
property.FindDomain("vtkSMProxyListDomain").GetProxy(idx)
)
property.SetData(proxyToSet)
except:
traceback.print_stack()
pass
elif value == "vtkProcessId":
property.SetElement(0, value)
else:
property.SetData(value)
except:
traceback.print_stack()
# --------------------------------------------------------------------------
[docs]def removeUnicode(value):
return value
# =============================================================================
# XML and Proxy Definition for GUI generation
# =============================================================================
[docs]def getProxyDomains(id):
"""
Return a json based structured based on the proxy XML.
"""
jsonDefinition = {}
proxy = idToProxy(id)
xmlElement = servermanager.ActiveConnection.Session.GetProxyDefinitionManager().GetCollapsedProxyDefinition(
proxy.GetXMLGroup(), proxy.GetXMLName(), None
)
nbChildren = xmlElement.GetNumberOfNestedElements()
for i in range(nbChildren):
xmlChild = xmlElement.GetNestedElement(i)
name = xmlChild.GetName()
if name.__contains__("Property"):
propName = xmlChild.GetAttribute("name")
jsonDefinition[propName] = extractProperty(proxy, xmlChild)
jsonDefinition[propName]["order"] = i
# Look for proxy properties and their domain
orderIndex = nbChildren
for property in proxy.ListProperties():
if property == "Input":
continue
if type(proxy.GetProperty(property)) == ProxyProperty:
try:
subProxyId = proxy.GetProperty(property).GetData().GetGlobalID()
subDomain = getProxyDomains(subProxyId)
for key in subDomain:
jsonDefinition[key] = subDomain[key]
jsonDefinition[key]["order"] = orderIndex
orderIndex = orderIndex + 1
except:
print("(Def) Error on", property, ", skipping it...")
# print ("(Def) Skip property: ", str(type(data)))
return jsonDefinition
[docs]def extractDomain(proxy, propertyName, xmlDomainElement):
domainObj = {}
name = xmlDomainElement.GetName()
domainObj["type"] = name[:-6]
# Handle Range
if name.__contains__("RangeDomain"):
if xmlDomainElement.GetAttribute("min") != None:
domainObj["min"] = xmlDomainElement.GetAttribute("min")
if xmlDomainElement.GetAttribute("max") != None:
domainObj["max"] = xmlDomainElement.GetAttribute("max")
# Handle Enum
if name.__contains__("EnumerationDomain"):
domainObj["enum"] = []
nbChildren = xmlDomainElement.GetNumberOfNestedElements()
for i in range(nbChildren):
xmlChild = xmlDomainElement.GetNestedElement(i)
if xmlChild.GetName() == "Entry":
domainObj["enum"].append(
{
"text": xmlChild.GetAttribute("text"),
"value": xmlChild.GetAttribute("value"),
}
)
# Handle ArrayListDomain
if name.__contains__("ArrayListDomain"):
dataType = xmlDomainElement.GetAttribute("attribute_type")
if dataType == "Scalars":
domainObj["nb_components"] = 1
elif dataType == "Vectors":
domainObj["nb_components"] = 3
else:
domainObj["nb_components"] = -1
# Handle ProxyListDomain
if name.__contains__("ProxyListDomain"):
domainObj["list"] = proxy.GetProperty(propertyName).Available
# Handle Bounds
if name.__contains__("BoundsDomain"):
for attrName in ["default_mode", "mode", "scale_factor"]:
try:
attrValue = xmlDomainElement.GetAttribute(attrName)
if attrValue:
domainObj[attrName] = attrValue
except:
pass
return domainObj
# =============================================================================
# File Management
# =============================================================================
[docs]def listFiles(pathToList):
"""
Create a tree structure of the given directory that will be understand by
the pipelineBrowser widget.
The provided path should not have a trailing '/'.
return {
children: [
{ name: 'fileName.vtk', path: '/full_path/to_file/fileName.vtk' },
{ name: 'directoryName', path: '/full_path/to_file/directoryName', children: [] }
]
}
"""
global fileList
if pathToList[-1] == "/":
pathToList = pathToList[:-1]
nodeTree = {}
nodeTree[pathToList] = {"children": []}
for path, directories, files in os.walk(pathToList):
parent = nodeTree[path]
for directory in directories:
child = {
"name": directory,
"path": (path + "/" + directory),
"children": [],
}
nodeTree[path + "/" + directory] = child
parent["children"].append(child)
for filename in files:
child = {"name": filename, "path": (path + "/" + filename)}
nodeTree[path + "/" + filename] = child
parent["children"].append(child)
fileList = nodeTree[pathToList]["children"]
return fileList
# =============================================================================
# Apply domains
# =============================================================================
[docs]def apply_domains(parentProxy, proxy_id):
"""
Handle bounds domain
"""
proxy = idToProxy(proxy_id)
# Call recursively on each sub-proxy if any
for property_name in proxy.ListProperties():
prop = proxy.GetProperty(property_name)
if prop.IsA("vtkSMProxyProperty"):
try:
if len(prop.Available) and prop.GetNumberOfProxies() == 1:
listdomain = prop.FindDomain("vtkSMProxyListDomain")
if listdomain:
for i in range(listdomain.GetNumberOfProxies()):
internal_proxy = listdomain.GetProxy(i)
apply_domains(
parentProxy, internal_proxy.GetGlobalIDAsString()
)
except:
exc_type, exc_obj, exc_tb = sys.exc_info()
print("Unexpected error:", exc_type, " line: ", exc_tb.tb_lineno)
# Reset all properties to leverage domain capabilities
for prop_name in proxy.ListProperties():
try:
prop = proxy.GetProperty(prop_name)
iter = prop.NewDomainIterator()
iter.Begin()
while not iter.IsAtEnd():
domain = iter.GetDomain()
iter.Next()
try:
if domain.IsA("vtkSMBoundsDomain"):
domain.SetDomainValues(
parentProxy.GetDataInformation().GetBounds()
)
except AttributeError as attrErr:
print("Caught exception setting domain values in apply_domains:")
print(attrErr)
prop.ResetToDefault()
# Need to UnRegister to handle the ref count from the NewDomainIterator
iter.UnRegister(None)
except:
exc_type, exc_obj, exc_tb = sys.exc_info()
print("Unexpected error:", exc_type, " line: ", exc_tb.tb_lineno)
proxy.UpdateVTKObjects()