Initial commit

node_modules/history/es/createBrowserHistory.js

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+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };
+
+import warning from 'warning';
+import invariant from 'invariant';
+import { createLocation } from './LocationUtils';
+import { addLeadingSlash, stripTrailingSlash, hasBasename, stripBasename, createPath } from './PathUtils';
+import createTransitionManager from './createTransitionManager';
+import { canUseDOM, addEventListener, removeEventListener, getConfirmation, supportsHistory, supportsPopStateOnHashChange, isExtraneousPopstateEvent } from './DOMUtils';
+
+var PopStateEvent = 'popstate';
+var HashChangeEvent = 'hashchange';
+
+var getHistoryState = function getHistoryState() {
+  try {
+    return window.history.state || {};
+  } catch (e) {
+    // IE 11 sometimes throws when accessing window.history.state
+    // See https://github.com/ReactTraining/history/pull/289
+    return {};
+  }
+};
+
+/**
+ * Creates a history object that uses the HTML5 history API including
+ * pushState, replaceState, and the popstate event.
+ */
+var createBrowserHistory = function createBrowserHistory() {
+  var props = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
+
+  invariant(canUseDOM, 'Browser history needs a DOM');
+
+  var globalHistory = window.history;
+  var canUseHistory = supportsHistory();
+  var needsHashChangeListener = !supportsPopStateOnHashChange();
+
+  var _props$forceRefresh = props.forceRefresh,
+      forceRefresh = _props$forceRefresh === undefined ? false : _props$forceRefresh,
+      _props$getUserConfirm = props.getUserConfirmation,
+      getUserConfirmation = _props$getUserConfirm === undefined ? getConfirmation : _props$getUserConfirm,
+      _props$keyLength = props.keyLength,
+      keyLength = _props$keyLength === undefined ? 6 : _props$keyLength;
+
+  var basename = props.basename ? stripTrailingSlash(addLeadingSlash(props.basename)) : '';
+
+  var getDOMLocation = function getDOMLocation(historyState) {
+    var _ref = historyState || {},
+        key = _ref.key,
+        state = _ref.state;
+
+    var _window$location = window.location,
+        pathname = _window$location.pathname,
+        search = _window$location.search,
+        hash = _window$location.hash;
+
+
+    var path = pathname + search + hash;
+
+    warning(!basename || hasBasename(path, basename), 'You are attempting to use a basename on a page whose URL path does not begin ' + 'with the basename. Expected path "' + path + '" to begin with "' + basename + '".');
+
+    if (basename) path = stripBasename(path, basename);
+
+    return createLocation(path, state, key);
+  };
+
+  var createKey = function createKey() {
+    return Math.random().toString(36).substr(2, keyLength);
+  };
+
+  var transitionManager = createTransitionManager();
+
+  var setState = function setState(nextState) {
+    _extends(history, nextState);
+
+    history.length = globalHistory.length;
+
+    transitionManager.notifyListeners(history.location, history.action);
+  };
+
+  var handlePopState = function handlePopState(event) {
+    // Ignore extraneous popstate events in WebKit.
+    if (isExtraneousPopstateEvent(event)) return;
+
+    handlePop(getDOMLocation(event.state));
+  };
+
+  var handleHashChange = function handleHashChange() {
+    handlePop(getDOMLocation(getHistoryState()));
+  };
+
+  var forceNextPop = false;
+
+  var handlePop = function handlePop(location) {
+    if (forceNextPop) {
+      forceNextPop = false;
+      setState();
+    } else {
+      var action = 'POP';
+
+      transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
+        if (ok) {
+          setState({ action: action, location: location });
+        } else {
+          revertPop(location);
+        }
+      });
+    }
+  };
+
+  var revertPop = function revertPop(fromLocation) {
+    var toLocation = history.location;
+
+    // TODO: We could probably make this more reliable by
+    // keeping a list of keys we've seen in sessionStorage.
+    // Instead, we just default to 0 for keys we don't know.
+
+    var toIndex = allKeys.indexOf(toLocation.key);
+
+    if (toIndex === -1) toIndex = 0;
+
+    var fromIndex = allKeys.indexOf(fromLocation.key);
+
+    if (fromIndex === -1) fromIndex = 0;
+
+    var delta = toIndex - fromIndex;
+
+    if (delta) {
+      forceNextPop = true;
+      go(delta);
+    }
+  };
+
+  var initialLocation = getDOMLocation(getHistoryState());
+  var allKeys = [initialLocation.key];
+
+  // Public interface
+
+  var createHref = function createHref(location) {
+    return basename + createPath(location);
+  };
+
+  var push = function push(path, state) {
+    warning(!((typeof path === 'undefined' ? 'undefined' : _typeof(path)) === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to push when the 1st ' + 'argument is a location-like object that already has state; it is ignored');
+
+    var action = 'PUSH';
+    var location = createLocation(path, state, createKey(), history.location);
+
+    transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
+      if (!ok) return;
+
+      var href = createHref(location);
+      var key = location.key,
+          state = location.state;
+
+
+      if (canUseHistory) {
+        globalHistory.pushState({ key: key, state: state }, null, href);
+
+        if (forceRefresh) {
+          window.location.href = href;
+        } else {
+          var prevIndex = allKeys.indexOf(history.location.key);
+          var nextKeys = allKeys.slice(0, prevIndex === -1 ? 0 : prevIndex + 1);
+
+          nextKeys.push(location.key);
+          allKeys = nextKeys;
+
+          setState({ action: action, location: location });
+        }
+      } else {
+        warning(state === undefined, 'Browser history cannot push state in browsers that do not support HTML5 history');
+
+        window.location.href = href;
+      }
+    });
+  };
+
+  var replace = function replace(path, state) {
+    warning(!((typeof path === 'undefined' ? 'undefined' : _typeof(path)) === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to replace when the 1st ' + 'argument is a location-like object that already has state; it is ignored');
+
+    var action = 'REPLACE';
+    var location = createLocation(path, state, createKey(), history.location);
+
+    transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
+      if (!ok) return;
+
+      var href = createHref(location);
+      var key = location.key,
+          state = location.state;
+
+
+      if (canUseHistory) {
+        globalHistory.replaceState({ key: key, state: state }, null, href);
+
+        if (forceRefresh) {
+          window.location.replace(href);
+        } else {
+          var prevIndex = allKeys.indexOf(history.location.key);
+
+          if (prevIndex !== -1) allKeys[prevIndex] = location.key;
+
+          setState({ action: action, location: location });
+        }
+      } else {
+        warning(state === undefined, 'Browser history cannot replace state in browsers that do not support HTML5 history');
+
+        window.location.replace(href);
+      }
+    });
+  };
+
+  var go = function go(n) {
+    globalHistory.go(n);
+  };
+
+  var goBack = function goBack() {
+    return go(-1);
+  };
+
+  var goForward = function goForward() {
+    return go(1);
+  };
+
+  var listenerCount = 0;
+
+  var checkDOMListeners = function checkDOMListeners(delta) {
+    listenerCount += delta;
+
+    if (listenerCount === 1) {
+      addEventListener(window, PopStateEvent, handlePopState);
+
+      if (needsHashChangeListener) addEventListener(window, HashChangeEvent, handleHashChange);
+    } else if (listenerCount === 0) {
+      removeEventListener(window, PopStateEvent, handlePopState);
+
+      if (needsHashChangeListener) removeEventListener(window, HashChangeEvent, handleHashChange);
+    }
+  };
+
+  var isBlocked = false;
+
+  var block = function block() {
+    var prompt = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
+
+    var unblock = transitionManager.setPrompt(prompt);
+
+    if (!isBlocked) {
+      checkDOMListeners(1);
+      isBlocked = true;
+    }
+
+    return function () {
+      if (isBlocked) {
+        isBlocked = false;
+        checkDOMListeners(-1);
+      }
+
+      return unblock();
+    };
+  };
+
+  var listen = function listen(listener) {
+    var unlisten = transitionManager.appendListener(listener);
+    checkDOMListeners(1);
+
+    return function () {
+      checkDOMListeners(-1);
+      unlisten();
+    };
+  };
+
+  var history = {
+    length: globalHistory.length,
+    action: 'POP',
+    location: initialLocation,
+    createHref: createHref,
+    push: push,
+    replace: replace,
+    go: go,
+    goBack: goBack,
+    goForward: goForward,
+    block: block,
+    listen: listen
+  };
+
+  return history;
+};
+
+export default createBrowserHistory;