private void ReadNodeInNodeSection(BinaryReaderEx reader, XbfNodeSection nodeSection, int offset)
{
// Save the current position and skip ahead to the new position
long originalPosition = reader.BaseStream.Position;
int newPosition = _firstNodeSectionPosition + nodeSection.NodeOffset;
int newEndPosition = _firstNodeSectionPosition + nodeSection.PositionalOffset;
reader.BaseStream.Position = newPosition + offset;
int objectStackDepthBefore = _objectStack.Count;
int objectCollectionStackDepthBefore = _objectCollectionStack.Count;
// Read the node from the specified position
ReadNodes(reader, int.MaxValue, false, true);
if (_objectStack.Count != objectStackDepthBefore)
{
throw new InvalidDataException("_objectStack corrupted");
}
if (_objectCollectionStack.Count != objectCollectionStackDepthBefore)
{
throw new InvalidDataException("_objectCollectionStack corrupted");
}
// Return to the original position
reader.BaseStream.Position = originalPosition;
}
private void ReadDataTemplate(BinaryReaderEx reader)
{
string propertyName = GetPropertyName(reader.ReadUInt16()); // Always "Template"
XbfNodeSection nodeSection = NodeSectionTable[reader.Read7BitEncodedInt()];
// List of StaticResources and ThemeResources referenced from inside the DataTemplate
int staticResourceCount = reader.Read7BitEncodedInt();
int themeResourceCount = reader.Read7BitEncodedInt();
for (int i = 0; i < staticResourceCount; i++)
{
string staticResource = StringTable[reader.ReadUInt16()];
}
for (int i = 0; i < themeResourceCount; i++)
{
string themeResource = StringTable[reader.ReadUInt16()];
}
ReadNodeSection(reader, nodeSection);
// Add the object we found as a property
var obj = _objectStack.Pop();
_objectStack.Peek().Properties.Add(new XbfObjectProperty(propertyName, obj));
}
private void ReadResourceDictionary(BinaryReaderEx reader, XbfNodeSection nodeSection, bool extended)
{
// Resources with keys
int resourcesCount = reader.Read7BitEncodedInt();
for (int i = 0; i < resourcesCount; i++)
{
string resourceKey = StringTable[reader.ReadUInt16()];
int position = reader.Read7BitEncodedInt(); // Secondary node stream offset
XbfObject obj = ReadObjectInNodeSection(reader, nodeSection, position);
obj.Key = resourceKey;
_objectCollectionStack.Peek().Add(obj);
}
// A subset of the resource keys from above seem to get repeated here, purpose unknown
int count = reader.Read7BitEncodedInt();
for (int i = 0; i < count; i++)
{
string resourceKey = StringTable[reader.ReadUInt16()];
}
// Styles with TargetType and no key
int styleCount = reader.Read7BitEncodedInt();
for (int i = 0; i < styleCount; i++)
{
string targetType = StringTable[reader.ReadUInt16()];
int position = reader.Read7BitEncodedInt(); // Secondary node stream offset
XbfObject obj = ReadObjectInNodeSection(reader, nodeSection, position);
_objectCollectionStack.Peek().Add(obj);
}
if (extended)
{
if (reader.Read7BitEncodedInt() != 0) // TODO: purpose unknown
{
throw new InvalidDataException("Unexpected value");
}
}
// A subset of the target types from above seem to get repeated here, purpose unknown
int count2 = reader.Read7BitEncodedInt();
for (int i = 0; i < count2; i++)
{
string targetType = StringTable[reader.ReadUInt16()];
}
}
private void ReadNodeSection(BinaryReaderEx reader, XbfNodeSection nodeSection)
{
// Save the current position and skip ahead to the new position
long originalPosition = reader.BaseStream.Position;
int newPosition = _firstNodeSectionPosition + nodeSection.NodeOffset;
int newEndPosition = _firstNodeSectionPosition + nodeSection.PositionalOffset;
reader.BaseStream.Position = newPosition;
// Read the nodes from the specified position
ReadNodes(reader, newEndPosition);
// Return to the original position
reader.BaseStream.Position = originalPosition;
}
private void ReadNodeSectionReference(BinaryReaderEx reader)
{
// The node section we're skipping to
XbfNodeSection nodeSection = NodeSectionTable[reader.Read7BitEncodedInt()];
if (reader.ReadUInt16() != 0) // TODO: unknown purpose
{
throw new InvalidDataException($"Unexpected value");
}
// Get the type of nodes contained in this section
int type = reader.Read7BitEncodedInt();
switch (type)
{
case 2: // Style
case 8: // 8 seems to be equivalent
ReadStyle(reader, nodeSection);
break;
case 7: // ResourceDictionary
ReadResourceDictionary(reader, nodeSection, false);
break;
case 371: // ResourceDictionary
ReadResourceDictionary(reader, nodeSection, true);
break;
case 5: // Visual states
SkipVisualStateBytes(reader);
ReadNodeSection(reader, nodeSection);
break;
case 6: // DeferredElement
ReadDeferredElement(reader, nodeSection, true);
break;
case 746: // DeferredElement
ReadDeferredElement(reader, nodeSection, false);
break;
default:
throw new InvalidDataException(string.Format("Unknown node type {0} while parsing referenced code section", type));
}
}
private void ReadDeferredElement(BinaryReaderEx reader, XbfNodeSection nodeSection, bool extended)
{
string deferredElementName = StringTable[reader.ReadUInt16()];
if (extended)
{
// The following properties can be ignored as they will appear in the secondary node section again
int count = reader.Read7BitEncodedInt();
for (int i = 0; i < count; i++)
{
string propertyName = GetPropertyName(reader.ReadUInt16());
object propertyValue = GetPropertyValue(reader);
}
}
ReadNodeSection(reader, nodeSection);
XbfObject childObj = _objectStack.Pop();
XbfObject deferredElement = _objectStack.Peek();
deferredElement.Children.Add(childObj);
}
private void ReadStyle(BinaryReaderEx reader, XbfNodeSection nodeSection)
{
int setterCount = reader.Read7BitEncodedInt();
for (int i = 0; i < setterCount; i++)
{
int valueType = reader.ReadByte();
string propertyName = null;
string typeName = null; // Name of type implementing the property, currently ignored
object propertyValue = null;
int valueOffset = 0;
switch (valueType)
{
case 0x01: // ThemeResource
case 0x02: // StaticResource
case 0x08: // General objects
propertyName = StringTable[reader.ReadUInt16()];
typeName = GetTypeName(reader.ReadUInt16());
valueOffset = reader.Read7BitEncodedInt();
break;
case 0x11: // ThemeResource
case 0x12: // StaticResource
case 0x18: // General objects
propertyName = GetPropertyName(reader.ReadUInt16());
valueOffset = reader.Read7BitEncodedInt();
break;
case 0x20:
propertyName = StringTable[reader.ReadUInt16()];
typeName = GetTypeName(reader.ReadUInt16());
propertyValue = GetPropertyValue(reader);
break;
case 0x30:
propertyName = GetPropertyName(reader.ReadUInt16());
propertyValue = GetPropertyValue(reader);
break;
default:
throw new InvalidDataException("Unexpected value");
}
// General objects can be read directly with ReadObjectInNodeSection
if (valueType == 0x08 || valueType == 0x18)
{
propertyValue = ReadObjectInNodeSection(reader, nodeSection, valueOffset);
}
if (propertyValue != null)
{
var setter = new XbfObject();
setter.TypeName = "Setter";
setter.Properties.Add(new XbfObjectProperty("Property", propertyName));
setter.Properties.Add(new XbfObjectProperty("Value", propertyValue));
_objectCollectionStack.Peek().Add(setter);
}
else // StaticResource or ThemeResource need to be read with the Setter already on the stack
{
var setter = new XbfObject();
setter.TypeName = "Setter";
setter.Properties.Add(new XbfObjectProperty("Property", propertyName));
_objectCollectionStack.Peek().Add(setter);
_objectStack.Push(setter);
ReadNodeInNodeSection(reader, nodeSection, valueOffset);
_objectStack.Pop();
}
}
}
