/// <summary>
/// Builds a list of nodes currently selected in the solution explorer
/// </summary>
/// <returns></returns>
public List <ItemNode> GetSelectedNodes()
{
var selected_nodes = new List <ItemNode>();
IntPtr hierarchyPtr = IntPtr.Zero;
IntPtr selectionContainer = IntPtr.Zero;
try
{
// Get the current project hierarchy, project item, and selection container for the current selection
// If the selection spans multiple hierachies, hierarchyPtr is Zero
uint itemid;
IVsMultiItemSelect multiItemSelect = null;
ErrorHandler.ThrowOnFailure(GlobalServices.selectionMonitor.GetCurrentSelection(out hierarchyPtr, out itemid, out multiItemSelect, out selectionContainer));
// We only care if there are one ore more nodes selected in the tree
if (itemid != VSConstants.VSITEMID_NIL && hierarchyPtr != IntPtr.Zero)
{
IVsHierarchy hierarchy = Marshal.GetObjectForIUnknown(hierarchyPtr) as IVsHierarchy;
if (itemid != VSConstants.VSITEMID_SELECTION)
{
// This is a single selection. Compare hirarchy with our hierarchy and get node from itemid
ItemNode node;
if (GlobalServices.IsSameComObject(Project, hierarchy) && itemMap.TryGetValue(itemid, out node))
{
selected_nodes.Add(node);
}
}
else if (multiItemSelect != null)
{
// This is a multiple item selection.
//Get number of items selected and also determine if the items are located in more than one hierarchy
uint numberOfSelectedItems;
int isSingleHierarchyInt;
ErrorHandler.ThrowOnFailure(multiItemSelect.GetSelectionInfo(out numberOfSelectedItems, out isSingleHierarchyInt));
bool isSingleHierarchy = (isSingleHierarchyInt != 0);
// Now loop all selected items and add to the list only those that are selected within this hierarchy
if (!isSingleHierarchy || (isSingleHierarchy && GlobalServices.IsSameComObject(Project, hierarchy)))
{
Debug.Assert(numberOfSelectedItems > 0, "Bad number of selected items");
VSITEMSELECTION[] vsItemSelections = new VSITEMSELECTION[numberOfSelectedItems];
uint flags = (isSingleHierarchy) ? (uint)__VSGSIFLAGS.GSI_fOmitHierPtrs : 0;
ErrorHandler.ThrowOnFailure(multiItemSelect.GetSelectedItems(flags, numberOfSelectedItems, vsItemSelections));
foreach (VSITEMSELECTION vsItemSelection in vsItemSelections)
{
if (isSingleHierarchy || GlobalServices.IsSameComObject(Project, vsItemSelection.pHier))
{
ItemNode node;
if (itemMap.TryGetValue(vsItemSelection.itemid, out node))
{
selected_nodes.Add(node);
}
}
}
}
}
}
}
finally
{
if (hierarchyPtr != IntPtr.Zero)
{
Marshal.Release(hierarchyPtr);
}
if (selectionContainer != IntPtr.Zero)
{
Marshal.Release(selectionContainer);
}
}
return(selected_nodes);
}