Do not dispose VectorRenderTiles

src/ol/VectorRenderTile.js

@@ -4,7 +4,6 @@
 import {getUid} from './util.js';
 import Tile from './Tile.js';
 import {createCanvasContext2D} from './dom.js';
-import {unlistenByKey} from './events.js';
 
 
 /**
@@ -29,10 +28,8 @@ class VectorRenderTile extends Tile {
    * @param {import("./tilegrid/TileGrid.js").default} sourceTileGrid Tile grid of the source.
    * @param {function(VectorRenderTile):Array<import("./VectorTile").default>} getSourceTiles Function
    * to get an source tiles for this tile.
-   * @param {function(VectorRenderTile):void} removeSourceTiles Function to remove this tile from its
-   * source tiles's consumer count.
    */
-  constructor(tileCoord, state, urlTileCoord, sourceTileGrid, getSourceTiles, removeSourceTiles) {
+  constructor(tileCoord, state, urlTileCoord, sourceTileGrid, getSourceTiles) {
 
     super(tileCoord, state, {transition: 0});
 
@@ -81,22 +78,12 @@ class VectorRenderTile extends Tile {
      */
     this.getSourceTiles = getSourceTiles.bind(this, this);
 
-    /**
-     * @type {!function(import("./VectorRenderTile.js").default):void}
-     */
-    this.removeSourceTiles_ = removeSourceTiles;
-
     /**
      * @private
      * @type {import("./tilegrid/TileGrid.js").default}
      */
     this.sourceTileGrid_ = sourceTileGrid;
 
-    /**
-     * @type {Array<import("./events.js").EventsKey>}
-     */
-    this.sourceTileListenerKeys = [];
-
     /**
      * z of the source tiles of the last getSourceTiles call.
      * @type {number}
@@ -115,21 +102,6 @@ class VectorRenderTile extends Tile {
     this.wrappedTileCoord = urlTileCoord;
   }
 
-  /**
-   * @inheritDoc
-   */
-  disposeInternal() {
-    this.sourceTileListenerKeys.forEach(unlistenByKey);
-    this.sourceTileListenerKeys.length = 0;
-    this.removeSourceTiles_(this);
-    for (const key in this.context_) {
-      const canvas = this.context_[key].canvas;
-      canvas.width = 0;
-      canvas.height = 0;
-    }
-    super.disposeInternal();
-  }
-
   /**
    * @param {import("./layer/Layer.js").default} layer Layer.
    * @return {CanvasRenderingContext2D} The rendering context.

src/ol/source/VectorTile.js

@@ -12,8 +12,7 @@ import {createXYZ, extentFromProjection, createForProjection} from '../tilegrid.
 import {buffer as bufferExtent, getIntersection, intersects} from '../extent.js';
 import EventType from '../events/EventType.js';
 import {loadFeaturesXhr} from '../featureloader.js';
-import {equals, remove} from '../array.js';
-import {listen, unlistenByKey} from '../events.js';
+import {equals} from '../array.js';
 
 /**
  * @typedef {Object} Options
@@ -294,13 +293,12 @@ class VectorTile extends UrlTile {
           }
           if (sourceTile.getState() !== TileState.EMPTY && tile.getState() === TileState.IDLE) {
             tile.loadingSourceTiles++;
-            const key = listen(sourceTile, EventType.CHANGE, function() {
+            sourceTile.addEventListener(EventType.CHANGE, function listenChange() {
               const state = sourceTile.getState();
               const sourceTileKey = sourceTile.getKey();
               if (state === TileState.LOADED || state === TileState.ERROR) {
                 if (state === TileState.LOADED) {
-                  remove(tile.sourceTileListenerKeys, key);
-                  unlistenByKey(key);
+                  sourceTile.removeEventListener(EventType.CHANGE, listenChange);
                   tile.loadingSourceTiles--;
                   delete tile.errorSourceTileKeys[sourceTileKey];
                 } else if (state === TileState.ERROR) {
@@ -314,7 +312,6 @@ class VectorTile extends UrlTile {
                 }
               }
             });
-            tile.sourceTileListenerKeys.push(key);
           }
         }.bind(this));
         if (!covered) {
@@ -411,8 +408,7 @@ class VectorTile extends UrlTile {
       empty ? TileState.EMPTY : TileState.IDLE,
       urlTileCoord,
       this.tileGrid,
-      this.getSourceTiles.bind(this, pixelRatio, projection),
-      this.removeSourceTiles.bind(this));
+      this.getSourceTiles.bind(this, pixelRatio, projection));
 
     newTile.key = key;
     if (tile) {