// -------------------------------------------------------------------
//
// Internal Methods
//
// -------------------------------------------------------------------
#region Internal Methods
internal static TextElement InsertElementClone(TextPointer start, TextPointer end, TextElement element)
{
TextElement newElement = (TextElement)Activator.CreateInstance(element.GetType());
// Copy properties to the newElement
newElement.TextContainer.SetValues(newElement.ContentStart, element.GetLocalValueEnumerator());
newElement.Reposition(start, end);
return newElement;
}
// Applies a whole property bag to a range from start to end to simulate inheritance of this property from source conntext
private static void ApplyContextualProperties(TextPointer start, TextPointer end, TextElement propertyBag)
{
Invariant.Assert(propertyBag.IsEmpty && propertyBag.Parent == null, "propertyBag is supposed to be an empty element outside any tree");
LocalValueEnumerator contextualProperties = propertyBag.GetLocalValueEnumerator();
while (start.CompareTo(end) < 0 && contextualProperties.MoveNext())
{
// Note: we repeatedly check for IsEmpty because the selection
// may become empty as a result of normalization after formatting
// (thai character sequence).
LocalValueEntry propertyEntry = contextualProperties.Current;
DependencyProperty property = propertyEntry.Property;
if (TextSchema.IsCharacterProperty(property) &&
TextSchema.IsParagraphProperty(property))
{
// In case a property is both an Inline and Paragraph property,
// propertyBag element type (section or span) decides how it should be applied.
if (TextSchema.IsBlock(propertyBag.GetType()))
{
ApplyContextualProperty(typeof(Block), start, end, property, propertyEntry.Value);
}
else
{
ApplyContextualProperty(typeof(Inline), start, end, property, propertyEntry.Value);
}
}
else if (TextSchema.IsCharacterProperty(property))
{
ApplyContextualProperty(typeof(Inline), start, end, property, propertyEntry.Value);
}
else if (TextSchema.IsParagraphProperty(property))
{
ApplyContextualProperty(typeof(Block), start, end, property, propertyEntry.Value);
}
}
// Merge formatting elements at end position
TextRangeEdit.MergeFormattingInlines(start);
TextRangeEdit.MergeFormattingInlines(end);
}
