private PatchedPath CreatePatchedPath(string path)
{
PatchedPath patchedPath = new PatchedPath(path);
patchedPath.PropertyChanged += PatchedPath_PropertyChanged;
return(patchedPath);
}
private void UpdatePatchedPaths(SortedSet <string> allPaths)
{
// master/update because we build the ObservableCollection in order also
// and we want to strictly minimize the changes in the observable collection
int masterCount = PatchedPaths.Count;
int masterIndex = 0;
foreach (string update in allPaths)
{
if (masterIndex == masterCount)
{
// ran our of master records, all updates go in
PatchedPaths.Insert(masterIndex, CreatePatchedPath(update));
masterIndex++;
masterCount++;
continue;
}
// scan up to the current update
while (masterIndex < masterCount)
{
PatchedPath master = PatchedPaths[masterIndex];
int comparison = string.Compare(master.Path, update, StringComparison.Ordinal);
if (comparison < 0)
{
// master item is no longer present
PatchedPaths.RemoveAt(masterIndex);
masterCount--;
DisposePatchedPath(master);
continue;
}
if (comparison == 0)
{
// found existing item, advance update and master
masterIndex++;
break;
}
// insert update item before master and keep considering the same master record
// (which is now one further to the right)
PatchedPaths.Insert(masterIndex, CreatePatchedPath(update));
masterIndex++;
masterCount++;
break;
}
}
}
private void DisposePatchedPath(PatchedPath patchedPath)
{
patchedPath.PropertyChanged -= PatchedPath_PropertyChanged;
}