1 files changed, 291 insertions, 0 deletions
diff --git a/devtools/client/shared/vendor/reselect.js b/devtools/client/shared/vendor/reselect.js
new file mode 100644
index 0000000000..9aa421edbc
--- /dev/null
+++ b/devtools/client/shared/vendor/reselect.js
@@ -0,0 +1,291 @@
+(function (global, factory) {
+  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+  typeof define === 'function' && define.amd ? define(['exports'], factory) :
+  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.Reselect = {}));
+})(this, (function (exports) { 'use strict';
+
+  // Cache implementation based on Erik Rasmussen's `lru-memoize`:
+  // https://github.com/erikras/lru-memoize
+  var NOT_FOUND = 'NOT_FOUND';
+
+  function createSingletonCache(equals) {
+    var entry;
+    return {
+      get: function get(key) {
+        if (entry && equals(entry.key, key)) {
+          return entry.value;
+        }
+
+        return NOT_FOUND;
+      },
+      put: function put(key, value) {
+        entry = {
+          key: key,
+          value: value
+        };
+      },
+      getEntries: function getEntries() {
+        return entry ? [entry] : [];
+      },
+      clear: function clear() {
+        entry = undefined;
+      }
+    };
+  }
+
+  function createLruCache(maxSize, equals) {
+    var entries = [];
+
+    function get(key) {
+      var cacheIndex = entries.findIndex(function (entry) {
+        return equals(key, entry.key);
+      }); // We found a cached entry
+
+      if (cacheIndex > -1) {
+        var entry = entries[cacheIndex]; // Cached entry not at top of cache, move it to the top
+
+        if (cacheIndex > 0) {
+          entries.splice(cacheIndex, 1);
+          entries.unshift(entry);
+        }
+
+        return entry.value;
+      } // No entry found in cache, return sentinel
+
+
+      return NOT_FOUND;
+    }
+
+    function put(key, value) {
+      if (get(key) === NOT_FOUND) {
+        // TODO Is unshift slow?
+        entries.unshift({
+          key: key,
+          value: value
+        });
+
+        if (entries.length > maxSize) {
+          entries.pop();
+        }
+      }
+    }
+
+    function getEntries() {
+      return entries;
+    }
+
+    function clear() {
+      entries = [];
+    }
+
+    return {
+      get: get,
+      put: put,
+      getEntries: getEntries,
+      clear: clear
+    };
+  }
+
+  var defaultEqualityCheck = function defaultEqualityCheck(a, b) {
+    return a === b;
+  };
+  function createCacheKeyComparator(equalityCheck) {
+    return function areArgumentsShallowlyEqual(prev, next) {
+      if (prev === null || next === null || prev.length !== next.length) {
+        return false;
+      } // Do this in a for loop (and not a `forEach` or an `every`) so we can determine equality as fast as possible.
+
+
+      var length = prev.length;
+
+      for (var i = 0; i < length; i++) {
+        if (!equalityCheck(prev[i], next[i])) {
+          return false;
+        }
+      }
+
+      return true;
+    };
+  }
+  // defaultMemoize now supports a configurable cache size with LRU behavior,
+  // and optional comparison of the result value with existing values
+  function defaultMemoize(func, equalityCheckOrOptions) {
+    var providedOptions = typeof equalityCheckOrOptions === 'object' ? equalityCheckOrOptions : {
+      equalityCheck: equalityCheckOrOptions
+    };
+    var _providedOptions$equa = providedOptions.equalityCheck,
+        equalityCheck = _providedOptions$equa === void 0 ? defaultEqualityCheck : _providedOptions$equa,
+        _providedOptions$maxS = providedOptions.maxSize,
+        maxSize = _providedOptions$maxS === void 0 ? 1 : _providedOptions$maxS,
+        resultEqualityCheck = providedOptions.resultEqualityCheck;
+    var comparator = createCacheKeyComparator(equalityCheck);
+    var cache = maxSize === 1 ? createSingletonCache(comparator) : createLruCache(maxSize, comparator); // we reference arguments instead of spreading them for performance reasons
+
+    function memoized() {
+      var value = cache.get(arguments);
+
+      if (value === NOT_FOUND) {
+        // @ts-ignore
+        value = func.apply(null, arguments);
+
+        if (resultEqualityCheck) {
+          var entries = cache.getEntries();
+          var matchingEntry = entries.find(function (entry) {
+            return resultEqualityCheck(entry.value, value);
+          });
+
+          if (matchingEntry) {
+            value = matchingEntry.value;
+          }
+        }
+
+        cache.put(arguments, value);
+      }
+
+      return value;
+    }
+
+    memoized.clearCache = function () {
+      return cache.clear();
+    };
+
+    return memoized;
+  }
+
+  function getDependencies(funcs) {
+    var dependencies = Array.isArray(funcs[0]) ? funcs[0] : funcs;
+
+    if (!dependencies.every(function (dep) {
+      return typeof dep === 'function';
+    })) {
+      var dependencyTypes = dependencies.map(function (dep) {
+        return typeof dep === 'function' ? "function " + (dep.name || 'unnamed') + "()" : typeof dep;
+      }).join(', ');
+      throw new Error("createSelector expects all input-selectors to be functions, but received the following types: [" + dependencyTypes + "]");
+    }
+
+    return dependencies;
+  }
+
+  function createSelectorCreator(memoize) {
+    for (var _len = arguments.length, memoizeOptionsFromArgs = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+      memoizeOptionsFromArgs[_key - 1] = arguments[_key];
+    }
+
+    var createSelector = function createSelector() {
+      for (var _len2 = arguments.length, funcs = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+        funcs[_key2] = arguments[_key2];
+      }
+
+      var _recomputations = 0;
+
+      var _lastResult; // Due to the intricacies of rest params, we can't do an optional arg after `...funcs`.
+      // So, start by declaring the default value here.
+      // (And yes, the words 'memoize' and 'options' appear too many times in this next sequence.)
+
+
+      var directlyPassedOptions = {
+        memoizeOptions: undefined
+      }; // Normally, the result func or "output selector" is the last arg
+
+      var resultFunc = funcs.pop(); // If the result func is actually an _object_, assume it's our options object
+
+      if (typeof resultFunc === 'object') {
+        directlyPassedOptions = resultFunc; // and pop the real result func off
+
+        resultFunc = funcs.pop();
+      }
+
+      if (typeof resultFunc !== 'function') {
+        throw new Error("createSelector expects an output function after the inputs, but received: [" + typeof resultFunc + "]");
+      } // Determine which set of options we're using. Prefer options passed directly,
+      // but fall back to options given to createSelectorCreator.
+
+
+      var _directlyPassedOption = directlyPassedOptions,
+          _directlyPassedOption2 = _directlyPassedOption.memoizeOptions,
+          memoizeOptions = _directlyPassedOption2 === void 0 ? memoizeOptionsFromArgs : _directlyPassedOption2; // Simplifying assumption: it's unlikely that the first options arg of the provided memoizer
+      // is an array. In most libs I've looked at, it's an equality function or options object.
+      // Based on that, if `memoizeOptions` _is_ an array, we assume it's a full
+      // user-provided array of options. Otherwise, it must be just the _first_ arg, and so
+      // we wrap it in an array so we can apply it.
+
+      var finalMemoizeOptions = Array.isArray(memoizeOptions) ? memoizeOptions : [memoizeOptions];
+      var dependencies = getDependencies(funcs);
+      var memoizedResultFunc = memoize.apply(void 0, [function () {
+        _recomputations++; // apply arguments instead of spreading for performance.
+
+        return resultFunc.apply(null, arguments);
+      }].concat(finalMemoizeOptions)); // If a selector is called with the exact same arguments we don't need to traverse our dependencies again.
+
+      var selector = memoize(function () {
+        var params = [];
+        var length = dependencies.length;
+
+        for (var i = 0; i < length; i++) {
+          // apply arguments instead of spreading and mutate a local list of params for performance.
+          // @ts-ignore
+          params.push(dependencies[i].apply(null, arguments));
+        } // apply arguments instead of spreading for performance.
+
+
+        _lastResult = memoizedResultFunc.apply(null, params);
+        return _lastResult;
+      });
+      Object.assign(selector, {
+        resultFunc: resultFunc,
+        memoizedResultFunc: memoizedResultFunc,
+        dependencies: dependencies,
+        lastResult: function lastResult() {
+          return _lastResult;
+        },
+        recomputations: function recomputations() {
+          return _recomputations;
+        },
+        resetRecomputations: function resetRecomputations() {
+          return _recomputations = 0;
+        }
+      });
+      return selector;
+    }; // @ts-ignore
+
+
+    return createSelector;
+  }
+  var createSelector = /* #__PURE__ */createSelectorCreator(defaultMemoize);
+  // Manual definition of state and output arguments
+  var createStructuredSelector = function createStructuredSelector(selectors, selectorCreator) {
+    if (selectorCreator === void 0) {
+      selectorCreator = createSelector;
+    }
+
+    if (typeof selectors !== 'object') {
+      throw new Error('createStructuredSelector expects first argument to be an object ' + ("where each property is a selector, instead received a " + typeof selectors));
+    }
+
+    var objectKeys = Object.keys(selectors);
+    var resultSelector = selectorCreator( // @ts-ignore
+    objectKeys.map(function (key) {
+      return selectors[key];
+    }), function () {
+      for (var _len3 = arguments.length, values = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {
+        values[_key3] = arguments[_key3];
+      }
+
+      return values.reduce(function (composition, value, index) {
+        composition[objectKeys[index]] = value;
+        return composition;
+      }, {});
+    });
+    return resultSelector;
+  };
+
+  exports.createSelector = createSelector;
+  exports.createSelectorCreator = createSelectorCreator;
+  exports.createStructuredSelector = createStructuredSelector;
+  exports.defaultEqualityCheck = defaultEqualityCheck;
+  exports.defaultMemoize = defaultMemoize;
+
+  Object.defineProperty(exports, '__esModule', { value: true });
+
+}));