private void NewFlowCommandCallback(object parameter)
{
XFlow flow = new XFlow();
FlowInfo flowInfo = new FlowInfo(flow, null);
Flows.Add(flowInfo);
CurrentFlow = flowInfo;
}
public static XDocument Save(XFlow flow)
{
XElement propertiesElement, nodesElement;
XDocument document = new XDocument(
new XElement("Flow",
propertiesElement = new XElement("Properties"),
nodesElement = new XElement("Nodes")
)
);
// Save references
Assembly[] assemblies = flow.Nodes.Select(n => Assembly.GetAssembly(n.GetType()))
.Except(new [] { Assembly.GetAssembly(typeof(Flow)) })
.Distinct()
.ToArray();
if (assemblies.Length > 0)
{
XElement referencesElement = new XElement("References");
propertiesElement.Add(referencesElement);
string binaryPath = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location));
foreach (Assembly assembly in assemblies)
{
string location = assembly.Location;
location = Utilities.MakeRelativePath(binaryPath, location);
referencesElement.Add(new XElement("Assembly", new XAttribute("Path", location)));
}
}
// Save nodes
for (int i = 0; i < flow.Nodes.Count; i++)
{
Node node = flow.Nodes[i];
XElement inputsElement, outputsElement, metadataElement;
XElement nodeElement = new XElement("Node",
new XAttribute("Type", node.GetType().FullName),
new XAttribute("Id", i),
inputsElement = new XElement("Inputs"),
outputsElement = new XElement("Outputs"),
metadataElement = new XElement("Metadata")
);
// Inputs
foreach (Variable input in node.Inputs)
{
if (input.Linked != null)
{
inputsElement.Add(new XAttribute(input.Name, "$" + input.Linked.Name));
}
else if (input.Value != input.DefaultValue)
{
TypeConverter typeConverter = TypeDescriptor.GetConverter(input.Type);
string value;
if (typeConverter != null && typeConverter.CanConvertTo(typeof(string)))
{
value = typeConverter.ConvertToString(input.Value);
}
else
{
value = input.Value.ToString();
}
inputsElement.Add(new XAttribute(input.Name, value));
}
}
// Outputs
foreach (Variable output in node.Outputs)
{
if (output.Linked != null)
{
outputsElement.Add(new XAttribute(output.Name, "$" + output.Linked.Name));
}
}
// Metadata
foreach (var pair in node.Metadata)
{
metadataElement.Add(new XAttribute(pair.Key, pair.Value.ToString()));
}
// Slots
Slot[] slots = node.Slots.ToArray();
for (int j = 0; j < slots.Length; j++)
{
if (slots[j].Nodes.Count == 0)
{
continue;
}
XElement slotElement = new XElement("Slot");
if (slots.Length > 1)
{
slotElement.Add(new XAttribute("Index", j));
}
foreach (Node subNode in slots[j].Nodes)
{
int id = flow.Nodes.IndexOf(subNode);
slotElement.Add(new XElement("Node", new XAttribute("Id", id)));
}
nodeElement.Add(slotElement);
}
// Clean empty elements
if (!inputsElement.HasAttributes)
{
inputsElement.Remove();
}
if (!outputsElement.HasAttributes)
{
outputsElement.Remove();
}
if (!metadataElement.HasAttributes)
{
metadataElement.Remove();
}
nodesElement.Add(nodeElement);
}
return(document);
}
public static XDocument Save(XFlow flow)
{
XElement propertiesElement, nodesElement;
XDocument document = new XDocument(
new XElement("Flow",
propertiesElement = new XElement("Properties"),
nodesElement = new XElement("Nodes")
)
);
// Save references
Assembly[] assemblies = flow.Nodes.Select(n => Assembly.GetAssembly(n.GetType()))
.Except(new [] { Assembly.GetAssembly(typeof(Flow)) })
.Distinct()
.ToArray();
if (assemblies.Length > 0)
{
XElement referencesElement = new XElement("References");
propertiesElement.Add(referencesElement);
string binaryPath = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location));
foreach (Assembly assembly in assemblies)
{
string location = assembly.Location;
location = Utilities.MakeRelativePath(binaryPath, location);
referencesElement.Add(new XElement("Assembly", new XAttribute("Path", location)));
}
}
// Save nodes
for (int i = 0; i < flow.Nodes.Count; i++)
{
Node node = flow.Nodes[i];
XElement inputsElement, outputsElement, metadataElement;
XElement nodeElement = new XElement("Node",
new XAttribute("Type", node.GetType().FullName),
new XAttribute("Id", i),
inputsElement = new XElement("Inputs"),
outputsElement = new XElement("Outputs"),
metadataElement = new XElement("Metadata")
);
// Inputs
foreach (Variable input in node.Inputs)
{
if (input.Linked != null)
inputsElement.Add(new XAttribute(input.Name, "$" + input.Linked.Name));
else if (input.Value != input.DefaultValue)
{
TypeConverter typeConverter = TypeDescriptor.GetConverter(input.Type);
string value;
if (typeConverter != null && typeConverter.CanConvertTo(typeof(string)))
value = typeConverter.ConvertToString(input.Value);
else
value = input.Value.ToString();
inputsElement.Add(new XAttribute(input.Name, value));
}
}
// Outputs
foreach (Variable output in node.Outputs)
{
if (output.Linked != null)
outputsElement.Add(new XAttribute(output.Name, "$" + output.Linked.Name));
}
// Metadata
foreach (var pair in node.Metadata)
metadataElement.Add(new XAttribute(pair.Key, pair.Value.ToString()));
// Slots
Slot[] slots = node.Slots.ToArray();
for (int j = 0; j < slots.Length; j++)
{
if (slots[j].Nodes.Count == 0)
continue;
XElement slotElement = new XElement("Slot");
if (slots.Length > 1)
slotElement.Add(new XAttribute("Index", j));
foreach (Node subNode in slots[j].Nodes)
{
int id = flow.Nodes.IndexOf(subNode);
slotElement.Add(new XElement("Node", new XAttribute("Id", id)));
}
nodeElement.Add(slotElement);
}
// Clean empty elements
if (!inputsElement.HasAttributes)
inputsElement.Remove();
if (!outputsElement.HasAttributes)
outputsElement.Remove();
if (!metadataElement.HasAttributes)
metadataElement.Remove();
nodesElement.Add(nodeElement);
}
return document;
}
public static XFlow Load(XDocument document)
{
Dictionary <int, Node> nodes = new Dictionary <int, Node>();
Dictionary <Slot, List <int> > slotNodes = new Dictionary <Slot, List <int> >();
List <Variable> globalVariables = new List <Variable>();
List <Variable> localVariables = new List <Variable>();
XElement propertiesElement = document.Root.Element("Properties");
XElement nodesElement = document.Root.Element("Properties");
// Load references
XElement[] referenceElements = propertiesElement?.Element("References")?.Elements()?.ToArray();
if (referenceElements != null)
{
foreach (XElement referenceElement in referenceElements)
{
switch (referenceElement.Name.LocalName)
{
case "Assembly":
string file = referenceElement.Attribute("Path").Value;
string path = file;
if (!Path.IsPathRooted(path))
{
path = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), path);
}
try
{
Assembly assembly = Assembly.LoadFile(path);
}
catch
{
throw new Exception("Could not find referenced assembly " + file);
}
break;
case "Script":
throw new NotSupportedException();
}
}
}
// Load global variables
XElement[] variableElements = propertiesElement?.Element("Variables")?.Elements()?.ToArray();
if (variableElements != null)
{
foreach (XElement variableElement in variableElements)
{
XAttribute nameAttribute = variableElement.Attribute("Name");
XAttribute valueAttribute = variableElement.Attribute("Value");
if (nameAttribute == null || valueAttribute == null)
{
throw new Exception("Variable name and/or value are missing in variable at line " + (variableElement as IXmlLineInfo).LineNumber);
}
string name = nameAttribute.Value;
if (globalVariables.Any(v => v.Name == name))
{
throw new Exception("There is already a global variable named " + name + " in this flow at line " + (variableElement as IXmlLineInfo).LineNumber);
}
globalVariables.Add(new Variable(name, typeof(object), valueAttribute.Value));
}
}
Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies();
AppDomain.CurrentDomain.AssemblyResolve += CurrentDomain_AssemblyResolve;
// Create nodes
XElement[] nodeElements = document.Root.Element("Nodes")?.Elements("Node")?.ToArray();
if (nodeElements != null)
{
foreach (XElement nodeElement in nodeElements)
{
XAttribute typeAttribute = nodeElement.Attribute("Type");
XAttribute idAttribute = nodeElement.Attribute("Id");
if (typeAttribute == null || idAttribute == null)
{
throw new Exception("Node type and/or id are missing in node at line " + (nodeElement as IXmlLineInfo).LineNumber);
}
Type type = assemblies.Select(a => a.GetType(typeAttribute.Value, false))
.Where(t => t != null)
.FirstOrDefault();
if (type == null)
{
throw new Exception("Could not find node type " + typeAttribute.Value + " at line " + (typeAttribute as IXmlLineInfo).LineNumber);
}
int id = -1;
if (!int.TryParse(idAttribute.Value, out id))
{
throw new Exception("Node id could not be read at line " + (idAttribute as IXmlLineInfo).LineNumber);
}
XElement inputsElement = nodeElement.Element("Inputs");
XElement outputsElement = nodeElement.Element("Outputs");
XElement metadataElement = nodeElement.Element("Metadata");
XElement[] slotsElement = nodeElement.Elements("Slot").ToArray();
Node node = Activator.CreateInstance(type) as Node;
// Read inputs
if (inputsElement != null)
{
foreach (XAttribute inputAttribute in inputsElement.Attributes())
{
Variable[] inputs = node.Inputs.ToArray();
string name = inputAttribute.Name.LocalName;
Variable variable = inputs.FirstOrDefault(i => i.Name == name);
if (variable == null)
{
Log.Warning("Input {0} could not be found in node type at line {1}. Its content will be saved in nodes metadata.", name, (inputAttribute as IXmlLineInfo).LineNumber);
node.Metadata["Input." + name] = inputAttribute.Value;
continue;
}
if (inputAttribute.Value.StartsWith("$"))
{
string link = inputAttribute.Value.Substring(1);
Variable linkedVariable = Enumerable.Concat(localVariables, globalVariables).FirstOrDefault(v => v.Name == link);
if (linkedVariable == null)
{
localVariables.Add(linkedVariable = new Variable(link, variable.Type));
}
variable.Link(linkedVariable);
}
else if (variable.Type == typeof(object) || variable.Type == typeof(string))
{
variable.Value = inputAttribute.Value;
}
else
{
object value = inputAttribute.Value;
try
{
variable.Value = value;
}
catch
{
throw new Exception("Could not convert the specified object into the variable " + name + " at line " + (inputAttribute as IXmlLineInfo).LineNumber);
}
}
}
}
Variable[] outputs = node.Outputs.ToArray();
// Read outputs
if (outputsElement != null)
{
foreach (XAttribute outputAttribute in outputsElement.Attributes())
{
string name = outputAttribute.Name.LocalName;
Variable variable = outputs.FirstOrDefault(i => i.Name == name);
if (variable == null)
{
Log.Warning("Output {0} could not be found in node type at line {1}. Its content will be saved in nodes metadata.", name, (outputAttribute as IXmlLineInfo).LineNumber);
node.Metadata["Output." + name] = outputAttribute.Value;
continue;
}
if (!outputAttribute.Value.StartsWith("$"))
{
Log.Warning("Output {0} cannot be set to a constant value at line {1}. Its content will be skipped.", name, (outputAttribute as IXmlLineInfo).LineNumber);
}
else
{
string link = outputAttribute.Value.Substring(1);
Variable linkedVariable = Enumerable.Concat(localVariables, globalVariables).FirstOrDefault(v => v.Name == link);
if (linkedVariable == null)
{
localVariables.Add(linkedVariable = new Variable(link, variable.Type));
}
variable.Link(linkedVariable);
}
}
}
// Read metadata
if (metadataElement != null)
{
foreach (XAttribute metadataAttribute in metadataElement.Attributes())
{
string name = metadataAttribute.Name.LocalName;
string value = metadataAttribute.Value;
int intValue;
if (int.TryParse(value, out intValue))
{
node.Metadata[name] = intValue;
continue;
}
double doubleValue;
if (double.TryParse(value, out doubleValue))
{
node.Metadata[name] = doubleValue;
continue;
}
node.Metadata[name] = value;
}
}
Slot[] slots = node.Slots.ToArray();
// Decode slots
foreach (XElement slotElement in slotsElement)
{
XAttribute indexAttribute = slotElement.Attribute("Index");
int index = 0;
if (indexAttribute != null && !int.TryParse(indexAttribute.Value, out index))
{
throw new Exception("Could not read slot index at line " + (indexAttribute as IXmlLineInfo).LineNumber);
}
if (slots.Length <= index)
{
throw new Exception("Could not find slot " + index + " at line " + (indexAttribute as IXmlLineInfo).LineNumber);
}
Slot slot = slots[index];
XElement[] slotNodeElements = slotElement.Elements("Node").ToArray();
foreach (XElement slotNodeElement in slotNodeElements)
{
int slotNodeId = -1;
XAttribute slotNodeIdAttribute = slotNodeElement.Attribute("Id");
if (slotNodeIdAttribute == null || !int.TryParse(slotNodeIdAttribute.Value, out slotNodeId))
{
throw new FormatException("Could not find the target node specified in slot at line " + (slotNodeElement as IXmlLineInfo).LineNumber);
}
List <int> slotNodeIds;
if (!slotNodes.TryGetValue(slot, out slotNodeIds))
{
slotNodes.Add(slot, slotNodeIds = new List <int>());
}
slotNodeIds.Add(slotNodeId);
}
}
nodes.Add(id, node);
}
// Resolve slots
foreach (var pair in slotNodes)
{
Slot slot = pair.Key;
foreach (int slotNodeId in pair.Value)
{
Node node;
if (!nodes.TryGetValue(slotNodeId, out node))
{
throw new FormatException("Could not find the target node id " + slotNodeId);
}
slot.Nodes.Add(node);
}
}
}
AppDomain.CurrentDomain.AssemblyResolve -= CurrentDomain_AssemblyResolve;
XFlow flow = new XFlow();
foreach (Node node in nodes.Values)
{
flow.Nodes.Add(node);
}
foreach (Variable variable in globalVariables)
{
flow.Variables.Add(variable);
}
return(flow);
}
public static XFlow Load(XDocument document)
{
Dictionary<int, Node> nodes = new Dictionary<int, Node>();
Dictionary<Slot, List<int>> slotNodes = new Dictionary<Slot, List<int>>();
List<Variable> globalVariables = new List<Variable>();
List<Variable> localVariables = new List<Variable>();
XElement propertiesElement = document.Root.Element("Properties");
XElement nodesElement = document.Root.Element("Properties");
// Load references
XElement[] referenceElements = propertiesElement?.Element("References")?.Elements()?.ToArray();
if (referenceElements != null)
{
foreach (XElement referenceElement in referenceElements)
{
switch (referenceElement.Name.LocalName)
{
case "Assembly":
string file = referenceElement.Attribute("Path").Value;
string path = file;
if (!Path.IsPathRooted(path))
path = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), path);
try
{
Assembly assembly = Assembly.LoadFile(path);
}
catch
{
throw new Exception("Could not find referenced assembly " + file);
}
break;
case "Script":
throw new NotSupportedException();
}
}
}
// Load global variables
XElement[] variableElements = propertiesElement?.Element("Variables")?.Elements()?.ToArray();
if (variableElements != null)
{
foreach (XElement variableElement in variableElements)
{
XAttribute nameAttribute = variableElement.Attribute("Name");
XAttribute valueAttribute = variableElement.Attribute("Value");
if (nameAttribute == null || valueAttribute == null)
throw new Exception("Variable name and/or value are missing in variable at line " + (variableElement as IXmlLineInfo).LineNumber);
string name = nameAttribute.Value;
if (globalVariables.Any(v => v.Name == name))
throw new Exception("There is already a global variable named " + name + " in this flow at line " + (variableElement as IXmlLineInfo).LineNumber);
globalVariables.Add(new Variable(name, typeof(object), valueAttribute.Value));
}
}
Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies();
AppDomain.CurrentDomain.AssemblyResolve += CurrentDomain_AssemblyResolve;
// Create nodes
XElement[] nodeElements = document.Root.Element("Nodes")?.Elements("Node")?.ToArray();
if (nodeElements != null)
{
foreach (XElement nodeElement in nodeElements)
{
XAttribute typeAttribute = nodeElement.Attribute("Type");
XAttribute idAttribute = nodeElement.Attribute("Id");
if (typeAttribute == null || idAttribute == null)
throw new Exception("Node type and/or id are missing in node at line " + (nodeElement as IXmlLineInfo).LineNumber);
Type type = assemblies.Select(a => a.GetType(typeAttribute.Value, false))
.Where(t => t != null)
.FirstOrDefault();
if (type == null)
throw new Exception("Could not find node type " + typeAttribute.Value + " at line " + (typeAttribute as IXmlLineInfo).LineNumber);
int id = -1;
if (!int.TryParse(idAttribute.Value, out id))
throw new Exception("Node id could not be read at line " + (idAttribute as IXmlLineInfo).LineNumber);
XElement inputsElement = nodeElement.Element("Inputs");
XElement outputsElement = nodeElement.Element("Outputs");
XElement metadataElement = nodeElement.Element("Metadata");
XElement[] slotsElement = nodeElement.Elements("Slot").ToArray();
Node node = Activator.CreateInstance(type) as Node;
// Read inputs
if (inputsElement != null)
{
foreach (XAttribute inputAttribute in inputsElement.Attributes())
{
Variable[] inputs = node.Inputs.ToArray();
string name = inputAttribute.Name.LocalName;
Variable variable = inputs.FirstOrDefault(i => i.Name == name);
if (variable == null)
{
Log.Warning("Input {0} could not be found in node type at line {1}. Its content will be saved in nodes metadata.", name, (inputAttribute as IXmlLineInfo).LineNumber);
node.Metadata["Input." + name] = inputAttribute.Value;
continue;
}
if (inputAttribute.Value.StartsWith("$"))
{
string link = inputAttribute.Value.Substring(1);
Variable linkedVariable = Enumerable.Concat(localVariables, globalVariables).FirstOrDefault(v => v.Name == link);
if (linkedVariable == null)
localVariables.Add(linkedVariable = new Variable(link, variable.Type));
variable.Link(linkedVariable);
}
else if (variable.Type == typeof(object) || variable.Type == typeof(string))
variable.Value = inputAttribute.Value;
else
{
object value = inputAttribute.Value;
try
{
variable.Value = value;
}
catch
{
throw new Exception("Could not convert the specified object into the variable " + name + " at line " + (inputAttribute as IXmlLineInfo).LineNumber);
}
}
}
}
Variable[] outputs = node.Outputs.ToArray();
// Read outputs
if (outputsElement != null)
{
foreach (XAttribute outputAttribute in outputsElement.Attributes())
{
string name = outputAttribute.Name.LocalName;
Variable variable = outputs.FirstOrDefault(i => i.Name == name);
if (variable == null)
{
Log.Warning("Output {0} could not be found in node type at line {1}. Its content will be saved in nodes metadata.", name, (outputAttribute as IXmlLineInfo).LineNumber);
node.Metadata["Output." + name] = outputAttribute.Value;
continue;
}
if (!outputAttribute.Value.StartsWith("$"))
Log.Warning("Output {0} cannot be set to a constant value at line {1}. Its content will be skipped.", name, (outputAttribute as IXmlLineInfo).LineNumber);
else
{
string link = outputAttribute.Value.Substring(1);
Variable linkedVariable = Enumerable.Concat(localVariables, globalVariables).FirstOrDefault(v => v.Name == link);
if (linkedVariable == null)
localVariables.Add(linkedVariable = new Variable(link, variable.Type));
variable.Link(linkedVariable);
}
}
}
// Read metadata
if (metadataElement != null)
{
foreach (XAttribute metadataAttribute in metadataElement.Attributes())
{
string name = metadataAttribute.Name.LocalName;
string value = metadataAttribute.Value;
int intValue;
if (int.TryParse(value, out intValue))
{
node.Metadata[name] = intValue;
continue;
}
double doubleValue;
if (double.TryParse(value, out doubleValue))
{
node.Metadata[name] = doubleValue;
continue;
}
node.Metadata[name] = value;
}
}
Slot[] slots = node.Slots.ToArray();
// Decode slots
foreach (XElement slotElement in slotsElement)
{
XAttribute indexAttribute = slotElement.Attribute("Index");
int index = 0;
if (indexAttribute != null && !int.TryParse(indexAttribute.Value, out index))
throw new Exception("Could not read slot index at line " + (indexAttribute as IXmlLineInfo).LineNumber);
if (slots.Length <= index)
throw new Exception("Could not find slot " + index + " at line " + (indexAttribute as IXmlLineInfo).LineNumber);
Slot slot = slots[index];
XElement[] slotNodeElements = slotElement.Elements("Node").ToArray();
foreach (XElement slotNodeElement in slotNodeElements)
{
int slotNodeId = -1;
XAttribute slotNodeIdAttribute = slotNodeElement.Attribute("Id");
if (slotNodeIdAttribute == null || !int.TryParse(slotNodeIdAttribute.Value, out slotNodeId))
throw new FormatException("Could not find the target node specified in slot at line " + (slotNodeElement as IXmlLineInfo).LineNumber);
List<int> slotNodeIds;
if (!slotNodes.TryGetValue(slot, out slotNodeIds))
slotNodes.Add(slot, slotNodeIds = new List<int>());
slotNodeIds.Add(slotNodeId);
}
}
nodes.Add(id, node);
}
// Resolve slots
foreach (var pair in slotNodes)
{
Slot slot = pair.Key;
foreach (int slotNodeId in pair.Value)
{
Node node;
if (!nodes.TryGetValue(slotNodeId, out node))
throw new FormatException("Could not find the target node id " + slotNodeId);
slot.Nodes.Add(node);
}
}
}
AppDomain.CurrentDomain.AssemblyResolve -= CurrentDomain_AssemblyResolve;
XFlow flow = new XFlow();
foreach (Node node in nodes.Values)
flow.Nodes.Add(node);
foreach (Variable variable in globalVariables)
flow.Variables.Add(variable);
return flow;
}