Manual class transform

src/ol/style/IconImageCache.js

@@ -7,26 +7,87 @@ import {asString} from '../color.js';
  * Singleton class. Available through {@link module:ol/style/IconImageCache~shared}.
  * @constructor
  */
-const IconImageCache = function() {
+class IconImageCache {
+ constructor() {
 
-  /**
-   * @type {!Object.<string, module:ol/style/IconImage>}
-   * @private
-   */
-  this.cache_ = {};
+   /**
+    * @type {!Object.<string, module:ol/style/IconImage>}
+    * @private
+    */
+   this.cache_ = {};
 
-  /**
-   * @type {number}
-   * @private
-   */
-  this.cacheSize_ = 0;
+   /**
+    * @type {number}
+    * @private
+    */
+   this.cacheSize_ = 0;
 
-  /**
-   * @type {number}
-   * @private
-   */
-  this.maxCacheSize_ = 32;
-};
+   /**
+    * @type {number}
+    * @private
+    */
+   this.maxCacheSize_ = 32;
+ }
+
+ /**
+  * FIXME empty description for jsdoc
+  */
+ clear() {
+   this.cache_ = {};
+   this.cacheSize_ = 0;
+ }
+
+ /**
+  * FIXME empty description for jsdoc
+  */
+ expire() {
+   if (this.cacheSize_ > this.maxCacheSize_) {
+     let i = 0;
+     for (const key in this.cache_) {
+       const iconImage = this.cache_[key];
+       if ((i++ & 3) === 0 && !iconImage.hasListener()) {
+         delete this.cache_[key];
+         --this.cacheSize_;
+       }
+     }
+   }
+ }
+
+ /**
+  * @param {string} src Src.
+  * @param {?string} crossOrigin Cross origin.
+  * @param {module:ol/color~Color} color Color.
+  * @return {module:ol/style/IconImage} Icon image.
+  */
+ get(src, crossOrigin, color) {
+   const key = getKey(src, crossOrigin, color);
+   return key in this.cache_ ? this.cache_[key] : null;
+ }
+
+ /**
+  * @param {string} src Src.
+  * @param {?string} crossOrigin Cross origin.
+  * @param {module:ol/color~Color} color Color.
+  * @param {module:ol/style/IconImage} iconImage Icon image.
+  */
+ set(src, crossOrigin, color, iconImage) {
+   const key = getKey(src, crossOrigin, color);
+   this.cache_[key] = iconImage;
+   ++this.cacheSize_;
+ }
+
+ /**
+  * Set the cache size of the icon cache. Default is `32`. Change this value when
+  * your map uses more than 32 different icon images and you are not caching icon
+  * styles on the application level.
+  * @param {number} maxCacheSize Cache max size.
+  * @api
+  */
+ setSize(maxCacheSize) {
+   this.maxCacheSize_ = maxCacheSize;
+   this.expire();
+ }
+}
 
 
 /**
@@ -41,68 +102,6 @@ function getKey(src, crossOrigin, color) {
 }
 
 
-/**
- * FIXME empty description for jsdoc
- */
-IconImageCache.prototype.clear = function() {
-  this.cache_ = {};
-  this.cacheSize_ = 0;
-};
-
-
-/**
- * FIXME empty description for jsdoc
- */
-IconImageCache.prototype.expire = function() {
-  if (this.cacheSize_ > this.maxCacheSize_) {
-    let i = 0;
-    for (const key in this.cache_) {
-      const iconImage = this.cache_[key];
-      if ((i++ & 3) === 0 && !iconImage.hasListener()) {
-        delete this.cache_[key];
-        --this.cacheSize_;
-      }
-    }
-  }
-};
-
-
-/**
- * @param {string} src Src.
- * @param {?string} crossOrigin Cross origin.
- * @param {module:ol/color~Color} color Color.
- * @return {module:ol/style/IconImage} Icon image.
- */
-IconImageCache.prototype.get = function(src, crossOrigin, color) {
-  const key = getKey(src, crossOrigin, color);
-  return key in this.cache_ ? this.cache_[key] : null;
-};
-
-
-/**
- * @param {string} src Src.
- * @param {?string} crossOrigin Cross origin.
- * @param {module:ol/color~Color} color Color.
- * @param {module:ol/style/IconImage} iconImage Icon image.
- */
-IconImageCache.prototype.set = function(src, crossOrigin, color, iconImage) {
-  const key = getKey(src, crossOrigin, color);
-  this.cache_[key] = iconImage;
-  ++this.cacheSize_;
-};
-
-
-/**
- * Set the cache size of the icon cache. Default is `32`. Change this value when
- * your map uses more than 32 different icon images and you are not caching icon
- * styles on the application level.
- * @param {number} maxCacheSize Cache max size.
- * @api
- */
-IconImageCache.prototype.setSize = function(maxCacheSize) {
-  this.maxCacheSize_ = maxCacheSize;
-  this.expire();
-};
 export default IconImageCache;