public static bool MaybeMapToNested(HierarchyItemPair outerInfo, out HierarchyItemPair nestedInfo)
{
Guid IID_IVsHierarchy = typeof(IVsHierarchy).GUID;
IVsHierarchy nestedHierarchy;
uint nestedItemId;
IntPtr nestedHierarchyPtr;
if (ErrorHandler.Succeeded(outerInfo.Hierarchy.GetNestedHierarchy(outerInfo.ItemID, ref IID_IVsHierarchy, out nestedHierarchyPtr, out nestedItemId)) &&
nestedHierarchyPtr != IntPtr.Zero) // For items in solution folders, it succeeds with a returned null ptr!
{
try
{
nestedHierarchy = Marshal.GetObjectForIUnknown(nestedHierarchyPtr) as IVsHierarchy;
}
finally
{
Marshal.Release(nestedHierarchyPtr);
}
nestedInfo = new HierarchyItemPair(nestedHierarchy, nestedItemId);
return(true);
}
else
{
nestedInfo = outerInfo;
return(false);
}
}
private void EnsureNestedInfo()
{
if (!_isNestedInfoValid)
{
_isNestedItem = HierarchyItemPair.MaybeMapToNested(_hierarchyInfo, out _nestedInfo);
_isNestedInfoValid = true;
}
}
public HierarchyItemIdentity(IVsHierarchy hierarchy, uint itemid)
{
// see if this hierarchy/itemid pair is equal to a node in a parent hierarchy
IVsHierarchy parentHierarchy;
uint parentItemid;
if (itemid == (uint)VSConstants.VSITEMID.Root &&
TryGetHierarchyProperty(hierarchy, itemid, (int)__VSHPROPID.VSHPROPID_ParentHierarchy, out parentHierarchy) &&
TryGetHierarchyProperty(hierarchy, itemid, (int)__VSHPROPID.VSHPROPID_ParentHierarchyItemid, UnboxAsUInt32, out parentItemid))
{
_isNestedInfoValid = true;
_isNestedItem = true;
_hierarchyInfo = new HierarchyItemPair(parentHierarchy, parentItemid);
_nestedInfo = new HierarchyItemPair(hierarchy, itemid);
}
else
{
_hierarchyInfo = new HierarchyItemPair(hierarchy, itemid);
}
}
