Do not spit out warns on invalid tile unload (preemtive working cache deletion), do not ignore working cache even if __restore=true.

src/tile.js

@@ -539,7 +539,7 @@ $.Tile.prototype = {
      */
     setData: function(value, type) {
         if (!this.tiledImage) {
-            return null; //async context can access the tile outside its lifetime
+            return Promise.resolve(); //async context can access the tile outside its lifetime
         }
 
         let cache = this.getCache(this._wcKey);
@@ -594,7 +594,8 @@ $.Tile.prototype = {
         //TODO IMPLEMENT LOCKING AND IGNORE PIPELINE OUT OF THESE CALLS
 
         // Now, if working cache exists, we set main cache to the working cache, since it has been updated
-        const cache = !requestedRestore && this.getCache(this._wcKey);
+        // if restore() was called last, then working cache was deleted (does not exist)
+        const cache = this.getCache(this._wcKey);
         if (cache) {
             let newCacheKey = this.cacheKey === this.originalCacheKey ? "mod://" + this.originalCacheKey : this.cacheKey;
             this.tiledImage._tileCache.consumeCache({
@@ -745,7 +746,7 @@ $.Tile.prototype = {
     removeCache: function(key, freeIfUnused = true) {
         if (!this._caches[key]) {
             // try to erase anyway in case the cache got stuck in memory
-            this.tiledImage._tileCache.unloadCacheForTile(this, key, freeIfUnused);
+            this.tiledImage._tileCache.unloadCacheForTile(this, key, freeIfUnused, true);
             return;
         }
 
@@ -771,7 +772,7 @@ $.Tile.prototype = {
                 return;
             }
         }
-        if (this.tiledImage._tileCache.unloadCacheForTile(this, key, freeIfUnused)) {
+        if (this.tiledImage._tileCache.unloadCacheForTile(this, key, freeIfUnused, false)) {
             //if we managed to free tile from record, we are sure we decreased cache count
             delete this._caches[key];
         }

src/tilecache.js

@@ -186,8 +186,8 @@
             let internalCache = this[DRAWER_INTERNAL_CACHE];
             internalCache = internalCache && internalCache[drawer.getId()];
             if (keepInternalCopy && !internalCache) {
-                $.console.warn("Attempt to render tile that is not prepared with drawer requesting " +
+                $.console.warn("Attempt to render tile cache %s that is not prepared with drawer requesting " +
-                    "internal cache! This might introduce artifacts.");
+                    "internal cache! This might introduce artifacts.", this);
 
                 this.prepareForRendering(drawer.getId(), supportedTypes, keepInternalCopy)
                     .then(() => this._triggerNeedsDraw());
@@ -207,8 +207,8 @@
             }
 
             if (!supportedTypes.includes(internalCache.type)) {
-                $.console.warn("Attempt to render tile that is not prepared for current drawer supported format: " +
+                $.console.warn("Attempt to render tile cache %s that is not prepared for current drawer " +
-                    "the preparation should've happened after tile processing has finished.");
+                    "supported format: the preparation should've happened after tile processing has finished.", this);
 
                 internalCache.transformTo(supportedTypes.length > 1 ? supportedTypes : supportedTypes[0])
                     .then(() => this._triggerNeedsDraw());
@@ -1096,9 +1096,10 @@
          * @param {OpenSeadragon.Tile} tile
          * @param {string} key cache key
          * @param {boolean} destroy if true, empty cache is destroyed, else left as a zombie
+         * @param {boolean} okIfNotExists sometimes we call destruction just to make sure, if true do not report as error
          * @private
          */
-        unloadCacheForTile(tile, key, destroy) {
+        unloadCacheForTile(tile, key, destroy, okIfNotExists) {
             const cacheRecord = this._cachesLoaded[key];
             //unload record only if relevant - the tile exists in the record
             if (cacheRecord) {
@@ -1122,7 +1123,9 @@
                     "does not belong to! This could mean a bug in the cache system.");
                 return false;
             }
-            $.console.warn("[TileCache.unloadCacheForTile] Attempting to delete missing cache!");
+            if (!okIfNotExists) {
+                $.console.warn("[TileCache.unloadCacheForTile] Attempting to delete missing cache!");
+            }
             return false;
         }
 

test/demo/filtering-plugin/index.html

@@ -79,10 +79,5 @@
         </section>
 
         <script src="demo.js"></script>
-
-        <!-- Google analytics -->
-        <script async type="text/javascript" id="_fed_an_ua_tag" src="https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=NIST&subagency=github&pua=UA-66610693-1&yt=true&exts=ppsx,pps,f90,sch,rtf,wrl,txz,m1v,xlsm,msi,xsd,f,tif,eps,mpg,xml,pl,xlt,c">
-</script>
-
     </body>
 </html>