Tracker: Trash entry must be set, otherwise bad things happen.

Follow up to hrev59580. Preload Trash icon again. We need to
Refresh cache in TrashWatcher::Run(), remove the rest.

Fixes #20026.

Change-Id: Ie39fff508c936819067eed198f5b801de2662ba8
Reviewed-on: https://review.haiku-os.org/c/haiku/+/10689
Reviewed-by: John Scipione <[email protected]>
Reviewed-by: waddlesplash <[email protected]>

src/kits/tracker/IconCache.cpp

@@ -965,9 +965,6 @@ IconCache::Preload(AutoLock<SimpleIconCache>* nodeCacheLocker,
 				entry = GetPrinterIcon(nodeCacheLocker, sharedCacheLocker,
 					&resultingOpenCache, model, source, mode, size, &lazyBitmap);
 				ASSERT(entry != NULL);
-			} else if (model->IsTrash()) {
-				// do not preload Trash icon, TrashWatcher handles it.
-				source = kNode;
 			} else {
 				if (source == kUnknownSource) {
 					// look for node icons first

src/kits/tracker/TrashWatcher.cpp

@@ -47,6 +47,7 @@ All rights reserved.
 #include "Attributes.h"
 #include "Bitmaps.h"
 #include "FSUtils.h"
+#include "IconCache.h"
 #include "Tracker.h"
 
 
@@ -71,8 +72,16 @@ BTrashWatcher::BTrashWatcher()
 thread_id
 BTrashWatcher::Run()
 {
-	fTrashFull = CheckTrashDirs();
-	UpdateTrashIcon();
+	// refresh Trash icon cache
+	BPath path;
+	if (find_directory(B_TRASH_DIRECTORY, &path) == B_OK) {
+		BDirectory trashDir(path.Path());
+		BEntry entry;
+		if (trashDir.GetEntry(&entry) == B_OK) {
+			Model trashModel(&entry);
+			IconCache::sIconCache->IconChanged(&trashModel);
+		}
+	}
 
 	return BLooper::Run();
 }