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createMemoryHistory.js
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createMemoryHistory.js
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"use strict";
exports.__esModule = true;
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; };
var _warning = require("warning");
var _warning2 = _interopRequireDefault(_warning);
var _PathUtils = require("./PathUtils");
var _LocationUtils = require("./LocationUtils");
var _createTransitionManager = require("./createTransitionManager");
var _createTransitionManager2 = _interopRequireDefault(_createTransitionManager);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
var clamp = function clamp(n, lowerBound, upperBound) {
return Math.min(Math.max(n, lowerBound), upperBound);
};
/**
* Creates a history object that stores locations in memory.
*/
var createMemoryHistory = function createMemoryHistory() {
var props = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
var getUserConfirmation = props.getUserConfirmation,
_props$initialEntries = props.initialEntries,
initialEntries = _props$initialEntries === undefined ? ["/"] : _props$initialEntries,
_props$initialIndex = props.initialIndex,
initialIndex = _props$initialIndex === undefined ? 0 : _props$initialIndex,
_props$keyLength = props.keyLength,
keyLength = _props$keyLength === undefined ? 6 : _props$keyLength;
var transitionManager = (0, _createTransitionManager2.default)();
var setState = function setState(nextState) {
_extends(history, nextState);
history.length = history.entries.length;
transitionManager.notifyListeners(history.location, history.action);
};
var createKey = function createKey() {
return Math.random().toString(36).substr(2, keyLength);
};
var index = clamp(initialIndex, 0, initialEntries.length - 1);
var entries = initialEntries.map(function (entry) {
return typeof entry === "string" ? (0, _LocationUtils.createLocation)(entry, undefined, createKey()) : (0, _LocationUtils.createLocation)(entry, undefined, entry.key || createKey());
});
// Public interface
var createHref = _PathUtils.createPath;
var push = function push(path, state) {
(0, _warning2.default)(!((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 = (0, _LocationUtils.createLocation)(path, state, createKey(), history.location);
transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
if (!ok) return;
var prevIndex = history.index;
var nextIndex = prevIndex + 1;
var nextEntries = history.entries.slice(0);
if (nextEntries.length > nextIndex) {
nextEntries.splice(nextIndex, nextEntries.length - nextIndex, location);
} else {
nextEntries.push(location);
}
setState({
action: action,
location: location,
index: nextIndex,
entries: nextEntries
});
});
};
var replace = function replace(path, state) {
(0, _warning2.default)(!((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 = (0, _LocationUtils.createLocation)(path, state, createKey(), history.location);
transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
if (!ok) return;
history.entries[history.index] = location;
setState({ action: action, location: location });
});
};
var go = function go(n) {
var nextIndex = clamp(history.index + n, 0, history.entries.length - 1);
var action = "POP";
var location = history.entries[nextIndex];
transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
if (ok) {
setState({
action: action,
location: location,
index: nextIndex
});
} else {
// Mimic the behavior of DOM histories by
// causing a render after a cancelled POP.
setState();
}
});
};
var goBack = function goBack() {
return go(-1);
};
var goForward = function goForward() {
return go(1);
};
var canGo = function canGo(n) {
var nextIndex = history.index + n;
return nextIndex >= 0 && nextIndex < history.entries.length;
};
var block = function block() {
var prompt = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
return transitionManager.setPrompt(prompt);
};
var listen = function listen(listener) {
return transitionManager.appendListener(listener);
};
var history = {
length: entries.length,
action: "POP",
location: entries[index],
index: index,
entries: entries,
createHref: createHref,
push: push,
replace: replace,
go: go,
goBack: goBack,
goForward: goForward,
canGo: canGo,
block: block,
listen: listen
};
return history;
};
exports.default = createMemoryHistory;