/// <summary>
/// Event handler for IGraph.OnChangingNodeAttribute and IGraph.OnChangingEdgeAttribute.
/// </summary>
/// <param name="element">The node or edge 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(IGraphElement element, AttributeType attrType,
AttributeChangeType changeType, Object newValue, Object keyValue)
{
foreach (RecordingState recordingState in recordings.Values)
{
MainGraphExportContext mainExportContext = recordingState.mainExportContext;
AddSubgraphsAsNeeded(mainExportContext, element, attrType, newValue, recordingState.writer);
AddSubgraphsAsNeeded(mainExportContext, element, attrType, keyValue, recordingState.writer);
switch (changeType)
{
case AttributeChangeType.Assign:
recordingState.writer.Write("@(\"" + graph.GetElementName(element) + "\")." + attrType.Name + " = ");
GRSExport.EmitAttribute(mainExportContext, attrType, newValue, graph, recordingState.writer);
recordingState.writer.WriteLine();
break;
case AttributeChangeType.PutElement:
recordingState.writer.Write("@(\"" + graph.GetElementName(element) + "\")." + attrType.Name);
switch (attrType.Kind)
{
case AttributeKind.SetAttr:
recordingState.writer.Write(".add(");
recordingState.writer.Write(GRSExport.ToString(mainExportContext, newValue, attrType.ValueType, graph));
recordingState.writer.WriteLine(")");
break;
case AttributeKind.MapAttr:
recordingState.writer.Write(".add(");
recordingState.writer.Write(GRSExport.ToString(mainExportContext, keyValue, attrType.KeyType, graph));
recordingState.writer.Write(", ");
recordingState.writer.Write(GRSExport.ToString(mainExportContext, newValue, attrType.ValueType, graph));
recordingState.writer.WriteLine(")");
break;
case AttributeKind.ArrayAttr:
if (keyValue == null)
{
recordingState.writer.Write(".add(");
recordingState.writer.Write(GRSExport.ToString(mainExportContext, newValue, attrType.ValueType, graph));
recordingState.writer.WriteLine(")");
}
else
{
recordingState.writer.Write(".add(");
recordingState.writer.Write(GRSExport.ToString(mainExportContext, newValue, attrType.ValueType, graph));
recordingState.writer.Write(", ");
recordingState.writer.Write(GRSExport.ToString(mainExportContext, keyValue, new AttributeType(null, null, AttributeKind.IntegerAttr, null, null, null, null, null, null, typeof(int)), graph));
recordingState.writer.WriteLine(")");
}
break;
case AttributeKind.DequeAttr:
if (keyValue == null)
{
recordingState.writer.Write(".add(");
recordingState.writer.Write(GRSExport.ToString(mainExportContext, newValue, attrType.ValueType, graph));
recordingState.writer.WriteLine(")");
}
else
{
recordingState.writer.Write(".add(");
recordingState.writer.Write(GRSExport.ToString(mainExportContext, newValue, attrType.ValueType, graph));
recordingState.writer.Write(", ");
recordingState.writer.Write(GRSExport.ToString(mainExportContext, keyValue, new AttributeType(null, null, AttributeKind.IntegerAttr, null, null, null, null, null, null, typeof(int)), graph));
recordingState.writer.WriteLine(")");
}
break;
default:
throw new Exception("Wrong attribute type for attribute change type");
}
break;
case AttributeChangeType.RemoveElement:
recordingState.writer.Write("@(\"" + graph.GetElementName(element) + "\")." + attrType.Name);
switch (attrType.Kind)
{
case AttributeKind.SetAttr:
recordingState.writer.Write(".rem(");
recordingState.writer.Write(GRSExport.ToString(mainExportContext, newValue, attrType.ValueType, graph));
recordingState.writer.WriteLine(")");
break;
case AttributeKind.MapAttr:
recordingState.writer.Write(".rem(");
recordingState.writer.Write(GRSExport.ToString(mainExportContext, keyValue, attrType.KeyType, graph));
recordingState.writer.WriteLine(")");
break;
case AttributeKind.ArrayAttr:
recordingState.writer.Write(".rem(");
if (keyValue != null)
{
recordingState.writer.Write(GRSExport.ToString(mainExportContext, keyValue, new AttributeType(null, null, AttributeKind.IntegerAttr, null, null, null, null, null, null, typeof(int)), graph));
}
recordingState.writer.WriteLine(")");
break;
case AttributeKind.DequeAttr:
recordingState.writer.Write(".rem(");
if (keyValue != null)
{
recordingState.writer.Write(GRSExport.ToString(mainExportContext, keyValue, new AttributeType(null, null, AttributeKind.IntegerAttr, null, null, null, null, null, null, typeof(int)), graph));
}
recordingState.writer.WriteLine(")");
break;
default:
throw new Exception("Wrong attribute type for attribute change type");
}
break;
case AttributeChangeType.AssignElement:
recordingState.writer.Write("@(\"" + graph.GetElementName(element) + "\")." + attrType.Name);
switch (attrType.Kind)
{
case AttributeKind.ArrayAttr:
recordingState.writer.Write("[");
recordingState.writer.Write(GRSExport.ToString(mainExportContext, keyValue, new AttributeType(null, null, AttributeKind.IntegerAttr, null, null, null, null, null, null, typeof(int)), graph));
recordingState.writer.Write("] = ");
recordingState.writer.WriteLine(GRSExport.ToString(mainExportContext, newValue, attrType.ValueType, graph));
break;
case AttributeKind.DequeAttr:
recordingState.writer.Write("[");
recordingState.writer.Write(GRSExport.ToString(mainExportContext, keyValue, new AttributeType(null, null, AttributeKind.IntegerAttr, null, null, null, null, null, null, typeof(int)), graph));
recordingState.writer.Write("] = ");
recordingState.writer.WriteLine(GRSExport.ToString(mainExportContext, newValue, attrType.ValueType, graph));
break;
case AttributeKind.MapAttr:
recordingState.writer.Write("[");
recordingState.writer.Write(GRSExport.ToString(mainExportContext, keyValue, attrType.KeyType, graph));
recordingState.writer.Write("] = ");
recordingState.writer.WriteLine(GRSExport.ToString(mainExportContext, newValue, attrType.ValueType, graph));
break;
default:
throw new Exception("Wrong attribute type for attribute change type");
}
break;
default:
throw new Exception("Unknown attribute change type");
}
}
}
