// Inserts an Inline at the current location, adding contextual
// elements as needed to enforce the schema.
internal void InsertInline(Inline inline)
{
TextPointer position = this;
// Check for hyperlink schema validity first -- we'll throw on an illegal Hyperlink descendent insert.
bool isValidChild = TextSchema.ValidateChild(position, /*childType*/inline.GetType(), false /* throwIfIllegalChild */, true /* throwIfIllegalHyperlinkDescendent */);
// Now, it is safe to assume that !isValidChild will be the case of incomplete content.
if (!isValidChild)
{
if (position.Parent == null)
{
//
throw new InvalidOperationException(SR.Get(SRID.TextSchema_CannotInsertContentInThisPosition));
}
// Ensure text content.
position = TextRangeEditTables.EnsureInsertionPosition(this);
Invariant.Assert(position.Parent is Run, "EnsureInsertionPosition() must return a position in text content");
Run run = (Run)position.Parent;
if (run.IsEmpty)
{
// Remove the implicit (empty) Run, since we are going to insert an inline at this position.
run.RepositionWithContent(null);
}
else
{
// Position is parented by Run, split formatting elements to prepare for inserting inline at this position.
position = TextRangeEdit.SplitFormattingElement(position, /*keepEmptyFormatting:*/false);
}
Invariant.Assert(TextSchema.IsValidChild(position, /*childType*/inline.GetType()));
}
inline.RepositionWithContent(position);
}
