pointer events generated by mouse events

src/ol/structs/weakmap.js

@@ -0,0 +1,77 @@
+// Based on https://github.com/Polymer/WeakMap
+/*
+* Copyright 2012 The Polymer Authors. All rights reserved.
+* Use of this source code is governed by a BSD-style
+* license that can be found in the LICENSE file.
+*/
+
+
+goog.provide('ol.structs.WeakMap');
+
+
+/**
+ * @suppress {undefinedVars}
+ * @return {boolean} Is `WeakMap` already defined?
+ */
+ol.structs.isWeakMapUndefined = function() {
+  return typeof WeakMap === 'undefined';
+};
+
+
+if (ol.structs.isWeakMapUndefined()) {
+  /**
+   * @constructor
+   */
+  ol.structs.WeakMap = function() {
+    this.name = '__st' + (Math.random() * 1e9 >>> 0) +
+        (ol.structs.WeakMap.counter++ + '__');
+  };
+
+
+  /**
+   * @param {*} key
+   * @param {*} value
+   */
+  ol.structs.WeakMap.prototype['set'] = function(key, value) {
+    var entry = key[this.name];
+    if (entry && entry[0] === key)
+      entry[1] = value;
+    else
+      ol.structs.WeakMap.defineProperty(key, this.name,
+          {value: [key, value], writable: true});
+  };
+
+
+  /**
+   * @param {*} key
+   * @return {*}
+   */
+  ol.structs.WeakMap.prototype['get'] = function(key) {
+    var entry;
+    return (entry = key[this.name]) && entry[0] === key ?
+        entry[1] : undefined;
+  };
+
+
+  /**
+   * @this {ol.structs.WeakMap}
+   * @param {*} key
+   */
+  ol.structs.WeakMap.prototype['delete'] = function(key) {
+    this['set'](key, undefined);
+  };
+} else {
+  ol.structs.WeakMap = WeakMap;
+}
+
+
+/**
+ * @type {function(...)}
+ */
+ol.structs.WeakMap.defineProperty = Object.defineProperty;
+
+
+/**
+ * @type {number}
+ */
+ol.structs.WeakMap.counter = Date.now() % 1e9;