Update wmts-hidpi, add nicer-api-docs

nicer-api-docs/closure-library/closure/goog/memoize/memoize.js

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+// Copyright 2008 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Tool for caching the result of expensive deterministic
+ * functions.
+ *
+ * @see http://en.wikipedia.org/wiki/Memoization
+ *
+ */
+
+goog.provide('goog.memoize');
+
+
+/**
+ * Decorator around functions that caches the inner function's return values.
+ * @param {Function} f The function to wrap. Its return value may only depend
+ *     on its arguments and 'this' context. There may be further restrictions
+ *     on the arguments depending on the capabilities of the serializer used.
+ * @param {function(number, Object): string=} opt_serializer A function to
+ *     serialize f's arguments. It must have the same signature as
+ *     goog.memoize.simpleSerializer. It defaults to that function.
+ * @this {Object} The object whose function is being wrapped.
+ * @return {!Function} The wrapped function.
+ */
+goog.memoize = function(f, opt_serializer) {
+  var functionUid = goog.getUid(f);
+  var serializer = opt_serializer || goog.memoize.simpleSerializer;
+
+  return function() {
+    if (goog.memoize.ENABLE_MEMOIZE) {
+      // In the strict mode, when this function is called as a global function,
+      // the value of 'this' is undefined instead of a global object. See:
+      // https://developer.mozilla.org/en/JavaScript/Strict_mode
+      var thisOrGlobal = this || goog.global;
+      // Maps the serialized list of args to the corresponding return value.
+      var cache = thisOrGlobal[goog.memoize.CACHE_PROPERTY_] ||
+          (thisOrGlobal[goog.memoize.CACHE_PROPERTY_] = {});
+      var key = serializer(functionUid, arguments);
+      return cache.hasOwnProperty(key) ? cache[key] :
+          (cache[key] = f.apply(this, arguments));
+    } else {
+      return f.apply(this, arguments);
+    }
+  };
+};
+
+
+/**
+ * @define {boolean} Flag to disable memoization in unit tests.
+ */
+goog.define('goog.memoize.ENABLE_MEMOIZE', true);
+
+
+/**
+ * Clears the memoization cache on the given object.
+ * @param {Object} cacheOwner The owner of the cache. This is the {@code this}
+ *     context of the memoized function.
+ */
+goog.memoize.clearCache = function(cacheOwner) {
+  cacheOwner[goog.memoize.CACHE_PROPERTY_] = {};
+};
+
+
+/**
+ * Name of the property used by goog.memoize as cache.
+ * @type {string}
+ * @private
+ */
+goog.memoize.CACHE_PROPERTY_ = 'closure_memoize_cache_';
+
+
+/**
+ * Simple and fast argument serializer function for goog.memoize.
+ * Supports string, number, boolean, null and undefined arguments. Doesn't
+ * support \x0B characters in the strings.
+ * @param {number} functionUid Unique identifier of the function whose result
+ *     is cached.
+ * @param {Object} args The arguments that the function to memoize is called
+ *     with. Note: it is an array-like object, because supports indexing and
+ *     has the length property.
+ * @return {string} The list of arguments with type information concatenated
+ *     with the functionUid argument, serialized as \x0B-separated string.
+ */
+goog.memoize.simpleSerializer = function(functionUid, args) {
+  var context = [functionUid];
+  for (var i = args.length - 1; i >= 0; --i) {
+    context.push(typeof args[i], args[i]);
+  }
+  return context.join('\x0B');
+};