/// ------------------------------------------------------------------------------------
/// <summary>
/// Gets the selection props for the specified IVwSelection
/// </summary>
/// <param name="vwSel">The view Selection</param>
/// <param name="vttp">Returned array of ITsTextProps in the selection</param>
/// <param name="vvps">Returned array of IVwPropertyStores in the selection</param>
/// <param name="cttp">Returned count of TsTxtProps (this is basically just the number
/// of runs in the selection)</param>
/// ------------------------------------------------------------------------------------
public static void GetSelectionProps(IVwSelection vwSel, out ITsTextProps[] vttp,
out IVwPropertyStore[] vvps, out int cttp)
{
Debug.Assert(vwSel != null);
vttp = null;
vvps = null;
cttp = 0;
if (!vwSel.IsValid)
return;
// The first call to GetSelectionProps gets the count of properties
vwSel.GetSelectionProps(0, ArrayPtr.Null, ArrayPtr.Null, out cttp);
if (cttp == 0)
return;
using (ArrayPtr pvTtp = MarshalEx.ArrayToNative<ITsTextProps>(cttp))
{
using (ArrayPtr pvVps = MarshalEx.ArrayToNative<IVwPropertyStore>(cttp))
{
vwSel.GetSelectionProps(cttp, pvTtp, pvVps, out cttp);
vttp = MarshalEx.NativeToArray<ITsTextProps>(pvTtp, cttp);
vvps = MarshalEx.NativeToArray< IVwPropertyStore>(pvVps, cttp);
}
}
}