/// <summary>
/// Init
/// </summary>
/// <param name="cAttributes">length of aAttributes</param>
/// <param name="aAttributes">array of FULLPROPSPEC structs</param>
/// <returns>managed array</returns>
internal static ManagedFullPropSpec[] MarshalFullPropSpecArray(
uint cAttributes, // length of aAttributes
FULLPROPSPEC[] aAttributes)
{
// If there are attributes, these override the flags
if (cAttributes > 0)
{
// Attributes count and array should match.
// This has already been checked for by XpsFilter.
Invariant.Assert(aAttributes != null);
ManagedFullPropSpec[] initAttributes = new ManagedFullPropSpec[checked((int)cAttributes)];
// convert to managed equivalents to isolate the marshaling effort
for (int i = 0; i < cAttributes; i++)
{
// convert and add to local list
initAttributes[i] = new ManagedFullPropSpec(aAttributes[i]);
}
return initAttributes;
}
else
return null;
}
/// <summary>
/// IFilter.Init
/// </summary>
/// <param name="grfFlags">usage flags</param>
/// <param name="cAttributes">number of elements in aAttributes</param>
/// <param name="aAttributes">array of Managed FULLPROPSPEC structs to restrict responses</param>
/// <returns>flags</returns>
/// <remarks>
/// Returns systematically IFILTER_FLAGS_NONE insofar as flags are used to control property search,
/// which is not supported (See GetValue).
/// </remarks>
public IFILTER_FLAGS Init(IFILTER_INIT grfFlags, // IFILTER_INIT value
uint cAttributes, // length of aAttributes
FULLPROPSPEC[] aAttributes) // restrict responses to the specified attributes
{
_grfFlags = grfFlags;
_cAttributes = cAttributes;
_aAttributes = aAttributes;
_partIterator.Reset();
_progress = Progress.FilteringNotStarted;
return IFILTER_FLAGS.IFILTER_FLAGS_NONE;
}
internal static void MarshalFullPropSpec(ManagedFullPropSpec fullPropSpec, ref FULLPROPSPEC native)
{
native.guid = fullPropSpec.Guid;
MarshalPropSpec(fullPropSpec.Property, ref native.property);
}
/// <summary>
/// Init
/// </summary>
/// <param name="grfFlags">usage flags</param>
/// <param name="cAttributes">length of aAttributes</param>
/// <param name="aAttributes">array of FULLPROPSPEC structs</param>
/// <returns>flags</returns>
public IFILTER_FLAGS Init(IFILTER_INIT grfFlags, // IFILTER_INIT value
uint cAttributes, // length of aAttributes
FULLPROPSPEC[] aAttributes) // restrict responses to the specified attributes
{
ManagedFullPropSpec[] managedArray = MarshalFullPropSpecArray(
cAttributes, aAttributes);
return _implementation.Init(grfFlags, managedArray);
}
/// <summary>
/// Handles native FULLPROPSPEC and does marshaling
/// </summary>
/// <param name="nativePropSpec"></param>
internal ManagedFullPropSpec(FULLPROPSPEC nativePropSpec)
{
_guid = nativePropSpec.guid;
_property = new ManagedPropSpec(nativePropSpec.property);
}