Removed pending state since it seems no longer necessary.

lib/pixi/deepzoom/tile.js

@@ -2,7 +2,7 @@
 /* globals PIXI, console*/
 
 const registeredTiles = new Map()
-const pendingTiles = new Map()
+// const pendingTiles = new Map()
 /** Implements a baseTexture cache. The last textures are kept for reuse  */
 let keepTextures = 0
 const keptTextures = []
@@ -37,33 +37,14 @@ export default class Tile extends PIXI.Sprite {
      * @param {*} url
      * @memberof Tile
      */
-    static schedule(url) {
+   /* static schedule(url) {
         let count = 0
         if (pendingTiles.has(url)) {
             count = pendingTiles.get(url)
         }
         pendingTiles.set(url, count + 1)
         // console.log("Tile.scheduled", url, pendingTiles.size)
-    }
-
-    /**
-     * Returns true iff the url is pending
-     *
-     * @static
-     * @param {*} url
-     * @returns
-     * @memberof Tile
-     */
-    static isPending(url) {
-        return pendingTiles.has(url) && pendingTiles.get(url) > 0
-    }
-
-    static isObsolete(url) {
-        if (registeredTiles.has(url) && registeredTiles.get(url) > 0) {
-            return false
-        }
-        return true
-    }
+    } */
 
     /**
      * Removes the given url from pending urls.
@@ -72,7 +53,7 @@ export default class Tile extends PIXI.Sprite {
      * @param {*} url
      * @memberof Tile
      */
-    static unschedule(url) {
+    /* static unschedule(url) {
         if (pendingTiles.has(url)) {
             let count = pendingTiles.get(url)
             if (count > 1) {
@@ -83,6 +64,26 @@ export default class Tile extends PIXI.Sprite {
             }
         }
         // console.log("Tile.unscheduled", url, pendingTiles.size)
+    } */
+
+
+    /**
+     * Returns true iff the url is pending
+     *
+     * @static
+     * @param {*} url
+     * @returns
+     * @memberof Tile
+     */
+    /*static isPending(url) {
+        return pendingTiles.has(url) && pendingTiles.get(url) > 0
+    } */
+
+    static isObsolete(url) {
+        if (registeredTiles.has(url) && registeredTiles.get(url) > 0) {
+            return false
+        }
+        return true
     }
 
     /**
@@ -107,7 +108,7 @@ export default class Tile extends PIXI.Sprite {
      * @memberof Tile
      */
     register(url, debug = false) {
-        Tile.unschedule(url)
+        //Tile.unschedule(url)
         if (registeredTiles.has(url)) {
             let tiles = registeredTiles.get(url)
             tiles.add(this)
@@ -161,7 +162,7 @@ export default class Tile extends PIXI.Sprite {
         }
         else {
             // No longer registered and not pending
-            if (count <= 0 && !Tile.isPending(this.url)) {
+            if (count <= 0) { // && !Tile.isPending(this.url)
                 let opts = { children: true, texture: true, baseTexture: true }
                 super.destroy(opts)
                 if (debug) console.log("Tile.destroy", registeredTiles.size, opts)