/// <summary>
/// Event handler for IGraph.OnChangingNodeAttribute and IGraph.OnChangingEdgeAttribute and IGraph.OnChangingObjectAttribute.
/// </summary>
/// <param name="owner">The node or edge or object whose attribute is changed.</param>
/// <param name="attrType">The type of the attribute to be changed.</param>
/// <param name="changeType">The type of the change which will be made.</param>
/// <param name="newValue">The new value of the attribute, if changeType==Assign.
/// Or the value to be inserted/removed if changeType==PutElement/RemoveElement on set.
/// Or the new map pair value to be inserted if changeType==PutElement on map.
/// Or the new value to be inserted/added if changeType==PutElement on array.
/// Or the new value to be assigned to the given position if changeType==AssignElement on array.</param>
/// <param name="keyValue">The map pair key to be inserted/removed if changeType==PutElement/RemoveElement on map.
/// The array index to be removed/written to if changeType==RemoveElement/AssignElement on array.</param>
void ChangingAttribute(IAttributeBearer owner, AttributeType attrType,
AttributeChangeType changeType, object newValue, object keyValue)
{
foreach (RecordingState recordingState in recordings.Values)
{
MainGraphExportContext mainExportContext = recordingState.mainExportContext;
StringBuilder deferredInits = new StringBuilder();
AddSubgraphsAsNeeded(mainExportContext, owner, attrType, newValue, recordingState.writer);
AddSubgraphsAsNeeded(mainExportContext, owner, attrType, keyValue, recordingState.writer);
switch (changeType)
{
case AttributeChangeType.Assign:
if (owner is IGraphElement)
{
recordingState.writer.Write("@(\"" + graph.GetElementName((IGraphElement)owner) + "\")." + attrType.Name + " = ");
}
else
{
EmitObjectAttributeAssignmentCreatingAsNeeded((IObject)owner, attrType, mainExportContext, recordingState);
}
StringBuilder sb = new StringBuilder();
GRSExport.EmitAttribute(mainExportContext, attrType, newValue, graph, recordingState.writer, sb);
recordingState.writer.WriteLine();
recordingState.writer.Write(sb.ToString());
break;
case AttributeChangeType.PutElement:
if (owner is IGraphElement)
{
recordingState.writer.Write("@(\"" + graph.GetElementName((IGraphElement)owner) + "\")." + attrType.Name);
}
else
{
EmitObjectAttributeAssignmentCreatingAsNeeded((IObject)owner, attrType, mainExportContext, recordingState);
}
switch (attrType.Kind)
{
case AttributeKind.SetAttr:
recordingState.writer.Write(".add(");
GRSExport.EmitAttributeValue(mainExportContext, newValue, attrType.ValueType, graph, recordingState.writer, deferredInits);
recordingState.writer.WriteLine(")");
break;
case AttributeKind.MapAttr:
recordingState.writer.Write(".add(");
GRSExport.EmitAttributeValue(mainExportContext, keyValue, attrType.KeyType, graph, recordingState.writer, deferredInits);
recordingState.writer.Write(", ");
GRSExport.EmitAttributeValue(mainExportContext, newValue, attrType.ValueType, graph, recordingState.writer, deferredInits);
recordingState.writer.WriteLine(")");
break;
case AttributeKind.ArrayAttr:
if (keyValue == null)
{
recordingState.writer.Write(".add(");
GRSExport.EmitAttributeValue(mainExportContext, newValue, attrType.ValueType, graph, recordingState.writer, deferredInits);
recordingState.writer.WriteLine(")");
}
else
{
recordingState.writer.Write(".add(");
GRSExport.EmitAttributeValue(mainExportContext, newValue, attrType.ValueType, graph, recordingState.writer, deferredInits);
recordingState.writer.Write(", ");
GRSExport.EmitAttributeValue(mainExportContext, keyValue, new AttributeType(null, null, AttributeKind.IntegerAttr, null, null, null, null, null, null, typeof(int)), graph, recordingState.writer, deferredInits);
recordingState.writer.WriteLine(")");
}
break;
case AttributeKind.DequeAttr:
if (keyValue == null)
{
recordingState.writer.Write(".add(");
GRSExport.EmitAttributeValue(mainExportContext, newValue, attrType.ValueType, graph, recordingState.writer, deferredInits);
recordingState.writer.WriteLine(")");
}
else
{
recordingState.writer.Write(".add(");
GRSExport.EmitAttributeValue(mainExportContext, newValue, attrType.ValueType, graph, recordingState.writer, deferredInits);
recordingState.writer.Write(", ");
GRSExport.EmitAttributeValue(mainExportContext, keyValue, new AttributeType(null, null, AttributeKind.IntegerAttr, null, null, null, null, null, null, typeof(int)), graph, recordingState.writer, deferredInits);
recordingState.writer.WriteLine(")");
}
break;
default:
throw new Exception("Wrong attribute type for attribute change type");
}
break;
case AttributeChangeType.RemoveElement:
if (owner is IGraphElement)
{
recordingState.writer.Write("@(\"" + graph.GetElementName((IGraphElement)owner) + "\")." + attrType.Name);
}
else
{
EmitObjectAttributeAssignmentCreatingAsNeeded((IObject)owner, attrType, mainExportContext, recordingState);
}
switch (attrType.Kind)
{
case AttributeKind.SetAttr:
recordingState.writer.Write(".rem(");
GRSExport.EmitAttributeValue(mainExportContext, newValue, attrType.ValueType, graph, recordingState.writer, deferredInits);
recordingState.writer.WriteLine(")");
break;
case AttributeKind.MapAttr:
recordingState.writer.Write(".rem(");
GRSExport.EmitAttributeValue(mainExportContext, keyValue, attrType.KeyType, graph, recordingState.writer, deferredInits);
recordingState.writer.WriteLine(")");
break;
case AttributeKind.ArrayAttr:
recordingState.writer.Write(".rem(");
if (keyValue != null)
{
GRSExport.EmitAttributeValue(mainExportContext, keyValue, new AttributeType(null, null, AttributeKind.IntegerAttr, null, null, null, null, null, null, typeof(int)), graph, recordingState.writer, deferredInits);
}
recordingState.writer.WriteLine(")");
break;
case AttributeKind.DequeAttr:
recordingState.writer.Write(".rem(");
if (keyValue != null)
{
GRSExport.EmitAttributeValue(mainExportContext, keyValue, new AttributeType(null, null, AttributeKind.IntegerAttr, null, null, null, null, null, null, typeof(int)), graph, recordingState.writer, deferredInits);
}
recordingState.writer.WriteLine(")");
break;
default:
throw new Exception("Wrong attribute type for attribute change type");
}
break;
case AttributeChangeType.AssignElement:
if (owner is IGraphElement)
{
recordingState.writer.Write("@(\"" + graph.GetElementName((IGraphElement)owner) + "\")." + attrType.Name);
}
else
{
EmitObjectAttributeAssignmentCreatingAsNeeded((IObject)owner, attrType, mainExportContext, recordingState);
}
switch (attrType.Kind)
{
case AttributeKind.ArrayAttr:
recordingState.writer.Write("[");
GRSExport.EmitAttributeValue(mainExportContext, keyValue, new AttributeType(null, null, AttributeKind.IntegerAttr, null, null, null, null, null, null, typeof(int)), graph, recordingState.writer, deferredInits);
recordingState.writer.Write("] = ");
GRSExport.EmitAttributeValue(mainExportContext, newValue, attrType.ValueType, graph, recordingState.writer, deferredInits);
recordingState.writer.WriteLine();
break;
case AttributeKind.DequeAttr:
recordingState.writer.Write("[");
GRSExport.EmitAttributeValue(mainExportContext, keyValue, new AttributeType(null, null, AttributeKind.IntegerAttr, null, null, null, null, null, null, typeof(int)), graph, recordingState.writer, deferredInits);
recordingState.writer.Write("] = ");
GRSExport.EmitAttributeValue(mainExportContext, newValue, attrType.ValueType, graph, recordingState.writer, deferredInits);
recordingState.writer.WriteLine();
break;
case AttributeKind.MapAttr:
recordingState.writer.Write("[");
GRSExport.EmitAttributeValue(mainExportContext, keyValue, attrType.KeyType, graph, recordingState.writer, deferredInits);
recordingState.writer.Write("] = ");
GRSExport.EmitAttributeValue(mainExportContext, newValue, attrType.ValueType, graph, recordingState.writer, deferredInits);
recordingState.writer.WriteLine();
break;
default:
throw new Exception("Wrong attribute type for attribute change type");
}
break;
default:
throw new Exception("Unknown attribute change type");
}
recordingState.writer.Write(deferredInits.ToString());
}
}
