// Helper to clear formatting properties from passed inline element, preserving only non-formatting ones
private static void ClearFormattingInlineProperties(Inline inline)
{
// Clear all properties from this inline element
LocalValueEnumerator properties = inline.GetLocalValueEnumerator();
while (properties.MoveNext())
{
DependencyProperty property = properties.Current.Property;
// Skip readonly and non-formatting properties
if (property.ReadOnly || TextSchema.IsNonFormattingCharacterProperty(property))
{
continue;
}
inline.ClearValue(properties.Current.Property);
}
}
// Copies all structural properties from source (clearing the property) to destination.
private static void TransferStructuralProperties(Inline source, Inline destination)
{
bool sourceIsChild = (source.Parent == destination);
for (int i = 0; i < TextSchema.StructuralCharacterProperties.Length; i++)
{
DependencyProperty property = TextSchema.StructuralCharacterProperties[i];
if ((sourceIsChild && HasLocalInheritableStructuralPropertyValue(source)) ||
(!sourceIsChild && HasLocalStructuralPropertyValue(source)))
{
object value = source.GetValue(property);
source.ClearValue(property);
destination.SetValue(property, value);
}
}
}