protected override string LogPrefix()
{
ThreadHelper.ThrowIfNotOnUIThread();
return
("HierarchyEventHandlers " +
VSTreeItem.MakeDebugName(Hierarchy));
}
// fired when various properties are changed on items, like the caption,
// but also expanded state, etc.
//
public override int OnPropertyChanged(uint item, int prop, uint flags)
{
ThreadHelper.ThrowIfNotOnUIThread();
if (prop != (int)__VSHPROPID.VSHPROPID_Caption)
{
// ignore everything except renaming
return(VSConstants.S_OK);
}
Trace(
"OnPropertyChanged caption: item={0} prop={1} flags={2}",
item, prop, flags);
// this is fired when renaming:
//
// 1) projects
// this is handled here for all projects and ignored in
// DocumentEvents.OnAfterAttributeChangeEx
//
// 2) C++ folders
// this is handled here
//
// 3) C++ files
// this is ignored because DocumentEvents.OnAfterAttributeChangeEx
// is also fired; for whatever reason, OnPropertyChanged is fired
// *3* times with the exact same arguments, and so cannot be
// differentiated, which would force an update three times every
// time a file is renamed
if (item == (uint)VSConstants.VSITEMID.Root)
{
// itemid of root means this is a project
ProjectRenamed?.Invoke(new VSTreeItem(Hierarchy, item));
}
else if (VSTreeItem.GetIsFolder(Hierarchy, item))
{
// this is a C++ folder
FolderRenamed?.Invoke(new VSTreeItem(Hierarchy, item));
}
return(VSConstants.S_OK);
}
// fired when an item is moved or added
//
public override int OnItemAdded(
uint parent, uint prevSibling, uint item)
{
ThreadHelper.ThrowIfNotOnUIThread();
Trace(
"OnItemAdded: parent={0} prevSibling={1} item={2}",
parent, prevSibling, item);
// it's generally impossible to differentiate between moves and
// renames for either files or folders, so they're merged into one
// rename event
// OnItemAdded for folders and files is fired for C# projects on
// move and rename, but only on move for C++ projects for move
//
// renaming a file or a folder for C++ projects fires
// OnPropertyChanged, which is handled below
if (VSTreeItem.GetIsFolder(Hierarchy, item))
{
FolderRenamed?.Invoke(new VSTreeItem(Hierarchy, item));
}
else
{
var d = VSDocument.DocumentFromItemID(Hierarchy, item);
if (d == null)
{
// this happens when renaming C# files for whatever reason,
// but it's fine because it's already handled in
// OnAfterAttributeChangeEx
return(VSConstants.S_OK);
}
DocumentRenamed?.Invoke(new VSDocument(d));
}
return(VSConstants.S_OK);
}