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Diffstat (limited to 'public/editor/localforage')
| -rw-r--r-- | public/editor/localforage/localforage.js | 2497 |
1 files changed, 2497 insertions, 0 deletions
diff --git a/public/editor/localforage/localforage.js b/public/editor/localforage/localforage.js new file mode 100644 index 0000000..42e5391 --- /dev/null +++ b/public/editor/localforage/localforage.js @@ -0,0 +1,2497 @@ +/*! + localForage -- Offline Storage, Improved + Version 1.2.2 + https://mozilla.github.io/localForage + (c) 2013-2015 Mozilla, Apache License 2.0 +*/ +(function() { +var define, requireModule, require, requirejs; + +(function() { + var registry = {}, seen = {}; + + define = function(name, deps, callback) { + registry[name] = { deps: deps, callback: callback }; + }; + + requirejs = require = requireModule = function(name) { + requirejs._eak_seen = registry; + + if (seen[name]) { return seen[name]; } + seen[name] = {}; + + if (!registry[name]) { + throw new Error("Could not find module " + name); + } + + var mod = registry[name], + deps = mod.deps, + callback = mod.callback, + reified = [], + exports; + + for (var i=0, l=deps.length; i<l; i++) { + if (deps[i] === 'exports') { + reified.push(exports = {}); + } else { + reified.push(requireModule(resolve(deps[i]))); + } + } + + var value = callback.apply(this, reified); + return seen[name] = exports || value; + + function resolve(child) { + if (child.charAt(0) !== '.') { return child; } + var parts = child.split("/"); + var parentBase = name.split("/").slice(0, -1); + + for (var i=0, l=parts.length; i<l; i++) { + var part = parts[i]; + + if (part === '..') { parentBase.pop(); } + else if (part === '.') { continue; } + else { parentBase.push(part); } + } + + return parentBase.join("/"); + } + }; +})(); + +define("promise/all", + ["./utils","exports"], + function(__dependency1__, __exports__) { + "use strict"; + /* global toString */ + + var isArray = __dependency1__.isArray; + var isFunction = __dependency1__.isFunction; + + /** + Returns a promise that is fulfilled when all the given promises have been + fulfilled, or rejected if any of them become rejected. The return promise + is fulfilled with an array that gives all the values in the order they were + passed in the `promises` array argument. + + Example: + + ```javascript + var promise1 = RSVP.resolve(1); + var promise2 = RSVP.resolve(2); + var promise3 = RSVP.resolve(3); + var promises = [ promise1, promise2, promise3 ]; + + RSVP.all(promises).then(function(array){ + // The array here would be [ 1, 2, 3 ]; + }); + ``` + + If any of the `promises` given to `RSVP.all` are rejected, the first promise + that is rejected will be given as an argument to the returned promises's + rejection handler. For example: + + Example: + + ```javascript + var promise1 = RSVP.resolve(1); + var promise2 = RSVP.reject(new Error("2")); + var promise3 = RSVP.reject(new Error("3")); + var promises = [ promise1, promise2, promise3 ]; + + RSVP.all(promises).then(function(array){ + // Code here never runs because there are rejected promises! + }, function(error) { + // error.message === "2" + }); + ``` + + @method all + @for RSVP + @param {Array} promises + @param {String} label + @return {Promise} promise that is fulfilled when all `promises` have been + fulfilled, or rejected if any of them become rejected. + */ + function all(promises) { + /*jshint validthis:true */ + var Promise = this; + + if (!isArray(promises)) { + throw new TypeError('You must pass an array to all.'); + } + + return new Promise(function(resolve, reject) { + var results = [], remaining = promises.length, + promise; + + if (remaining === 0) { + resolve([]); + } + + function resolver(index) { + return function(value) { + resolveAll(index, value); + }; + } + + function resolveAll(index, value) { + results[index] = value; + if (--remaining === 0) { + resolve(results); + } + } + + for (var i = 0; i < promises.length; i++) { + promise = promises[i]; + + if (promise && isFunction(promise.then)) { + promise.then(resolver(i), reject); + } else { + resolveAll(i, promise); + } + } + }); + } + + __exports__.all = all; + }); +define("promise/asap", + ["exports"], + function(__exports__) { + "use strict"; + var browserGlobal = (typeof window !== 'undefined') ? window : {}; + var BrowserMutationObserver = browserGlobal.MutationObserver || browserGlobal.WebKitMutationObserver; + var local = (typeof global !== 'undefined') ? global : (this === undefined? window:this); + + // node + function useNextTick() { + return function() { + process.nextTick(flush); + }; + } + + function useMutationObserver() { + var iterations = 0; + var observer = new BrowserMutationObserver(flush); + var node = document.createTextNode(''); + observer.observe(node, { characterData: true }); + + return function() { + node.data = (iterations = ++iterations % 2); + }; + } + + function useSetTimeout() { + return function() { + local.setTimeout(flush, 1); + }; + } + + var queue = []; + function flush() { + for (var i = 0; i < queue.length; i++) { + var tuple = queue[i]; + var callback = tuple[0], arg = tuple[1]; + callback(arg); + } + queue = []; + } + + var scheduleFlush; + + // Decide what async method to use to triggering processing of queued callbacks: + if (typeof process !== 'undefined' && {}.toString.call(process) === '[object process]') { + scheduleFlush = useNextTick(); + } else if (BrowserMutationObserver) { + scheduleFlush = useMutationObserver(); + } else { + scheduleFlush = useSetTimeout(); + } + + function asap(callback, arg) { + var length = queue.push([callback, arg]); + if (length === 1) { + // If length is 1, that means that we need to schedule an async flush. + // If additional callbacks are queued before the queue is flushed, they + // will be processed by this flush that we are scheduling. + scheduleFlush(); + } + } + + __exports__.asap = asap; + }); +define("promise/config", + ["exports"], + function(__exports__) { + "use strict"; + var config = { + instrument: false + }; + + function configure(name, value) { + if (arguments.length === 2) { + config[name] = value; + } else { + return config[name]; + } + } + + __exports__.config = config; + __exports__.configure = configure; + }); +define("promise/polyfill", + ["./promise","./utils","exports"], + function(__dependency1__, __dependency2__, __exports__) { + "use strict"; + /*global self*/ + var RSVPPromise = __dependency1__.Promise; + var isFunction = __dependency2__.isFunction; + + function polyfill() { + var local; + + if (typeof global !== 'undefined') { + local = global; + } else if (typeof window !== 'undefined' && window.document) { + local = window; + } else { + local = self; + } + + var es6PromiseSupport = + "Promise" in local && + // Some of these methods are missing from + // Firefox/Chrome experimental implementations + "resolve" in local.Promise && + "reject" in local.Promise && + "all" in local.Promise && + "race" in local.Promise && + // Older version of the spec had a resolver object + // as the arg rather than a function + (function() { + var resolve; + new local.Promise(function(r) { resolve = r; }); + return isFunction(resolve); + }()); + + if (!es6PromiseSupport) { + local.Promise = RSVPPromise; + } + } + + __exports__.polyfill = polyfill; + }); +define("promise/promise", + ["./config","./utils","./all","./race","./resolve","./reject","./asap","exports"], + function(__dependency1__, __dependency2__, __dependency3__, __dependency4__, __dependency5__, __dependency6__, __dependency7__, __exports__) { + "use strict"; + var config = __dependency1__.config; + var configure = __dependency1__.configure; + var objectOrFunction = __dependency2__.objectOrFunction; + var isFunction = __dependency2__.isFunction; + var now = __dependency2__.now; + var all = __dependency3__.all; + var race = __dependency4__.race; + var staticResolve = __dependency5__.resolve; + var staticReject = __dependency6__.reject; + var asap = __dependency7__.asap; + + var counter = 0; + + config.async = asap; // default async is asap; + + function Promise(resolver) { + if (!isFunction(resolver)) { + throw new TypeError('You must pass a resolver function as the first argument to the promise constructor'); + } + + if (!(this instanceof Promise)) { + throw new TypeError("Failed to construct 'Promise': Please use the 'new' operator, this object constructor cannot be called as a function."); + } + + this._subscribers = []; + + invokeResolver(resolver, this); + } + + function invokeResolver(resolver, promise) { + function resolvePromise(value) { + resolve(promise, value); + } + + function rejectPromise(reason) { + reject(promise, reason); + } + + try { + resolver(resolvePromise, rejectPromise); + } catch(e) { + rejectPromise(e); + } + } + + function invokeCallback(settled, promise, callback, detail) { + var hasCallback = isFunction(callback), + value, error, succeeded, failed; + + if (hasCallback) { + try { + value = callback(detail); + succeeded = true; + } catch(e) { + failed = true; + error = e; + } + } else { + value = detail; + succeeded = true; + } + + if (handleThenable(promise, value)) { + return; + } else if (hasCallback && succeeded) { + resolve(promise, value); + } else if (failed) { + reject(promise, error); + } else if (settled === FULFILLED) { + resolve(promise, value); + } else if (settled === REJECTED) { + reject(promise, value); + } + } + + var PENDING = void 0; + var SEALED = 0; + var FULFILLED = 1; + var REJECTED = 2; + + function subscribe(parent, child, onFulfillment, onRejection) { + var subscribers = parent._subscribers; + var length = subscribers.length; + + subscribers[length] = child; + subscribers[length + FULFILLED] = onFulfillment; + subscribers[length + REJECTED] = onRejection; + } + + function publish(promise, settled) { + var child, callback, subscribers = promise._subscribers, detail = promise._detail; + + for (var i = 0; i < subscribers.length; i += 3) { + child = subscribers[i]; + callback = subscribers[i + settled]; + + invokeCallback(settled, child, callback, detail); + } + + promise._subscribers = null; + } + + Promise.prototype = { + constructor: Promise, + + _state: undefined, + _detail: undefined, + _subscribers: undefined, + + then: function(onFulfillment, onRejection) { + var promise = this; + + var thenPromise = new this.constructor(function() {}); + + if (this._state) { + var callbacks = arguments; + config.async(function invokePromiseCallback() { + invokeCallback(promise._state, thenPromise, callbacks[promise._state - 1], promise._detail); + }); + } else { + subscribe(this, thenPromise, onFulfillment, onRejection); + } + + return thenPromise; + }, + + 'catch': function(onRejection) { + return this.then(null, onRejection); + } + }; + + Promise.all = all; + Promise.race = race; + Promise.resolve = staticResolve; + Promise.reject = staticReject; + + function handleThenable(promise, value) { + var then = null, + resolved; + + try { + if (promise === value) { + throw new TypeError("A promises callback cannot return that same promise."); + } + + if (objectOrFunction(value)) { + then = value.then; + + if (isFunction(then)) { + then.call(value, function(val) { + if (resolved) { return true; } + resolved = true; + + if (value !== val) { + resolve(promise, val); + } else { + fulfill(promise, val); + } + }, function(val) { + if (resolved) { return true; } + resolved = true; + + reject(promise, val); + }); + + return true; + } + } + } catch (error) { + if (resolved) { return true; } + reject(promise, error); + return true; + } + + return false; + } + + function resolve(promise, value) { + if (promise === value) { + fulfill(promise, value); + } else if (!handleThenable(promise, value)) { + fulfill(promise, value); + } + } + + function fulfill(promise, value) { + if (promise._state !== PENDING) { return; } + promise._state = SEALED; + promise._detail = value; + + config.async(publishFulfillment, promise); + } + + function reject(promise, reason) { + if (promise._state !== PENDING) { return; } + promise._state = SEALED; + promise._detail = reason; + + config.async(publishRejection, promise); + } + + function publishFulfillment(promise) { + publish(promise, promise._state = FULFILLED); + } + + function publishRejection(promise) { + publish(promise, promise._state = REJECTED); + } + + __exports__.Promise = Promise; + }); +define("promise/race", + ["./utils","exports"], + function(__dependency1__, __exports__) { + "use strict"; + /* global toString */ + var isArray = __dependency1__.isArray; + + /** + `RSVP.race` allows you to watch a series of promises and act as soon as the + first promise given to the `promises` argument fulfills or rejects. + + Example: + + ```javascript + var promise1 = new RSVP.Promise(function(resolve, reject){ + setTimeout(function(){ + resolve("promise 1"); + }, 200); + }); + + var promise2 = new RSVP.Promise(function(resolve, reject){ + setTimeout(function(){ + resolve("promise 2"); + }, 100); + }); + + RSVP.race([promise1, promise2]).then(function(result){ + // result === "promise 2" because it was resolved before promise1 + // was resolved. + }); + ``` + + `RSVP.race` is deterministic in that only the state of the first completed + promise matters. For example, even if other promises given to the `promises` + array argument are resolved, but the first completed promise has become + rejected before the other promises became fulfilled, the returned promise + will become rejected: + + ```javascript + var promise1 = new RSVP.Promise(function(resolve, reject){ + setTimeout(function(){ + resolve("promise 1"); + }, 200); + }); + + var promise2 = new RSVP.Promise(function(resolve, reject){ + setTimeout(function(){ + reject(new Error("promise 2")); + }, 100); + }); + + RSVP.race([promise1, promise2]).then(function(result){ + // Code here never runs because there are rejected promises! + }, function(reason){ + // reason.message === "promise2" because promise 2 became rejected before + // promise 1 became fulfilled + }); + ``` + + @method race + @for RSVP + @param {Array} promises array of promises to observe + @param {String} label optional string for describing the promise returned. + Useful for tooling. + @return {Promise} a promise that becomes fulfilled with the value the first + completed promises is resolved with if the first completed promise was + fulfilled, or rejected with the reason that the first completed promise + was rejected with. + */ + function race(promises) { + /*jshint validthis:true */ + var Promise = this; + + if (!isArray(promises)) { + throw new TypeError('You must pass an array to race.'); + } + return new Promise(function(resolve, reject) { + var results = [], promise; + + for (var i = 0; i < promises.length; i++) { + promise = promises[i]; + + if (promise && typeof promise.then === 'function') { + promise.then(resolve, reject); + } else { + resolve(promise); + } + } + }); + } + + __exports__.race = race; + }); +define("promise/reject", + ["exports"], + function(__exports__) { + "use strict"; + /** + `RSVP.reject` returns a promise that will become rejected with the passed + `reason`. `RSVP.reject` is essentially shorthand for the following: + + ```javascript + var promise = new RSVP.Promise(function(resolve, reject){ + reject(new Error('WHOOPS')); + }); + + promise.then(function(value){ + // Code here doesn't run because the promise is rejected! + }, function(reason){ + // reason.message === 'WHOOPS' + }); + ``` + + Instead of writing the above, your code now simply becomes the following: + + ```javascript + var promise = RSVP.reject(new Error('WHOOPS')); + + promise.then(function(value){ + // Code here doesn't run because the promise is rejected! + }, function(reason){ + // reason.message === 'WHOOPS' + }); + ``` + + @method reject + @for RSVP + @param {Any} reason value that the returned promise will be rejected with. + @param {String} label optional string for identifying the returned promise. + Useful for tooling. + @return {Promise} a promise that will become rejected with the given + `reason`. + */ + function reject(reason) { + /*jshint validthis:true */ + var Promise = this; + + return new Promise(function (resolve, reject) { + reject(reason); + }); + } + + __exports__.reject = reject; + }); +define("promise/resolve", + ["exports"], + function(__exports__) { + "use strict"; + function resolve(value) { + /*jshint validthis:true */ + if (value && typeof value === 'object' && value.constructor === this) { + return value; + } + + var Promise = this; + + return new Promise(function(resolve) { + resolve(value); + }); + } + + __exports__.resolve = resolve; + }); +define("promise/utils", + ["exports"], + function(__exports__) { + "use strict"; + function objectOrFunction(x) { + return isFunction(x) || (typeof x === "object" && x !== null); + } + + function isFunction(x) { + return typeof x === "function"; + } + + function isArray(x) { + return Object.prototype.toString.call(x) === "[object Array]"; + } + + // Date.now is not available in browsers < IE9 + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/now#Compatibility + var now = Date.now || function() { return new Date().getTime(); }; + + + __exports__.objectOrFunction = objectOrFunction; + __exports__.isFunction = isFunction; + __exports__.isArray = isArray; + __exports__.now = now; + }); +requireModule('promise/polyfill').polyfill(); +}());(function() { + 'use strict'; + + // Sadly, the best way to save binary data in WebSQL/localStorage is serializing + // it to Base64, so this is how we store it to prevent very strange errors with less + // verbose ways of binary <-> string data storage. + var BASE_CHARS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'; + + var SERIALIZED_MARKER = '__lfsc__:'; + var SERIALIZED_MARKER_LENGTH = SERIALIZED_MARKER.length; + + // OMG the serializations! + var TYPE_ARRAYBUFFER = 'arbf'; + var TYPE_BLOB = 'blob'; + var TYPE_INT8ARRAY = 'si08'; + var TYPE_UINT8ARRAY = 'ui08'; + var TYPE_UINT8CLAMPEDARRAY = 'uic8'; + var TYPE_INT16ARRAY = 'si16'; + var TYPE_INT32ARRAY = 'si32'; + var TYPE_UINT16ARRAY = 'ur16'; + var TYPE_UINT32ARRAY = 'ui32'; + var TYPE_FLOAT32ARRAY = 'fl32'; + var TYPE_FLOAT64ARRAY = 'fl64'; + var TYPE_SERIALIZED_MARKER_LENGTH = SERIALIZED_MARKER_LENGTH + + TYPE_ARRAYBUFFER.length; + + // Serialize a value, afterwards executing a callback (which usually + // instructs the `setItem()` callback/promise to be executed). This is how + // we store binary data with localStorage. + function serialize(value, callback) { + var valueString = ''; + if (value) { + valueString = value.toString(); + } + + // Cannot use `value instanceof ArrayBuffer` or such here, as these + // checks fail when running the tests using casper.js... + // + // TODO: See why those tests fail and use a better solution. + if (value && (value.toString() === '[object ArrayBuffer]' || + value.buffer && + value.buffer.toString() === '[object ArrayBuffer]')) { + // Convert binary arrays to a string and prefix the string with + // a special marker. + var buffer; + var marker = SERIALIZED_MARKER; + + if (value instanceof ArrayBuffer) { + buffer = value; + marker += TYPE_ARRAYBUFFER; + } else { + buffer = value.buffer; + + if (valueString === '[object Int8Array]') { + marker += TYPE_INT8ARRAY; + } else if (valueString === '[object Uint8Array]') { + marker += TYPE_UINT8ARRAY; + } else if (valueString === '[object Uint8ClampedArray]') { + marker += TYPE_UINT8CLAMPEDARRAY; + } else if (valueString === '[object Int16Array]') { + marker += TYPE_INT16ARRAY; + } else if (valueString === '[object Uint16Array]') { + marker += TYPE_UINT16ARRAY; + } else if (valueString === '[object Int32Array]') { + marker += TYPE_INT32ARRAY; + } else if (valueString === '[object Uint32Array]') { + marker += TYPE_UINT32ARRAY; + } else if (valueString === '[object Float32Array]') { + marker += TYPE_FLOAT32ARRAY; + } else if (valueString === '[object Float64Array]') { + marker += TYPE_FLOAT64ARRAY; + } else { + callback(new Error('Failed to get type for BinaryArray')); + } + } + + callback(marker + bufferToString(buffer)); + } else if (valueString === '[object Blob]') { + // Conver the blob to a binaryArray and then to a string. + var fileReader = new FileReader(); + + fileReader.onload = function() { + var str = bufferToString(this.result); + + callback(SERIALIZED_MARKER + TYPE_BLOB + str); + }; + + fileReader.readAsArrayBuffer(value); + } else { + try { + callback(JSON.stringify(value)); + } catch (e) { + window.console.error("Couldn't convert value into a JSON " + + 'string: ', value); + + callback(null, e); + } + } + } + + // Deserialize data we've inserted into a value column/field. We place + // special markers into our strings to mark them as encoded; this isn't + // as nice as a meta field, but it's the only sane thing we can do whilst + // keeping localStorage support intact. + // + // Oftentimes this will just deserialize JSON content, but if we have a + // special marker (SERIALIZED_MARKER, defined above), we will extract + // some kind of arraybuffer/binary data/typed array out of the string. + function deserialize(value) { + // If we haven't marked this string as being specially serialized (i.e. + // something other than serialized JSON), we can just return it and be + // done with it. + if (value.substring(0, + SERIALIZED_MARKER_LENGTH) !== SERIALIZED_MARKER) { + return JSON.parse(value); + } + + // The following code deals with deserializing some kind of Blob or + // TypedArray. First we separate out the type of data we're dealing + // with from the data itself. + var serializedString = value.substring(TYPE_SERIALIZED_MARKER_LENGTH); + var type = value.substring(SERIALIZED_MARKER_LENGTH, + TYPE_SERIALIZED_MARKER_LENGTH); + + var buffer = stringToBuffer(serializedString); + + // Return the right type based on the code/type set during + // serialization. + switch (type) { + case TYPE_ARRAYBUFFER: + return buffer; + case TYPE_BLOB: + return new Blob([buffer]); + case TYPE_INT8ARRAY: + return new Int8Array(buffer); + case TYPE_UINT8ARRAY: + return new Uint8Array(buffer); + case TYPE_UINT8CLAMPEDARRAY: + return new Uint8ClampedArray(buffer); + case TYPE_INT16ARRAY: + return new Int16Array(buffer); + case TYPE_UINT16ARRAY: + return new Uint16Array(buffer); + case TYPE_INT32ARRAY: + return new Int32Array(buffer); + case TYPE_UINT32ARRAY: + return new Uint32Array(buffer); + case TYPE_FLOAT32ARRAY: + return new Float32Array(buffer); + case TYPE_FLOAT64ARRAY: + return new Float64Array(buffer); + default: + throw new Error('Unkown type: ' + type); + } + } + + function stringToBuffer(serializedString) { + // Fill the string into a ArrayBuffer. + var bufferLength = serializedString.length * 0.75; + var len = serializedString.length; + var i; + var p = 0; + var encoded1, encoded2, encoded3, encoded4; + + if (serializedString[serializedString.length - 1] === '=') { + bufferLength--; + if (serializedString[serializedString.length - 2] === '=') { + bufferLength--; + } + } + + var buffer = new ArrayBuffer(bufferLength); + var bytes = new Uint8Array(buffer); + + for (i = 0; i < len; i+=4) { + encoded1 = BASE_CHARS.indexOf(serializedString[i]); + encoded2 = BASE_CHARS.indexOf(serializedString[i+1]); + encoded3 = BASE_CHARS.indexOf(serializedString[i+2]); + encoded4 = BASE_CHARS.indexOf(serializedString[i+3]); + + /*jslint bitwise: true */ + bytes[p++] = (encoded1 << 2) | (encoded2 >> 4); + bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2); + bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63); + } + return buffer; + } + + // Converts a buffer to a string to store, serialized, in the backend + // storage library. + function bufferToString(buffer) { + // base64-arraybuffer + var bytes = new Uint8Array(buffer); + var base64String = ''; + var i; + + for (i = 0; i < bytes.length; i += 3) { + /*jslint bitwise: true */ + base64String += BASE_CHARS[bytes[i] >> 2]; + base64String += BASE_CHARS[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)]; + base64String += BASE_CHARS[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)]; + base64String += BASE_CHARS[bytes[i + 2] & 63]; + } + + if ((bytes.length % 3) === 2) { + base64String = base64String.substring(0, base64String.length - 1) + '='; + } else if (bytes.length % 3 === 1) { + base64String = base64String.substring(0, base64String.length - 2) + '=='; + } + + return base64String; + } + + var localforageSerializer = { + serialize: serialize, + deserialize: deserialize, + stringToBuffer: stringToBuffer, + bufferToString: bufferToString + }; + + if (typeof module !== 'undefined' && module.exports) { + module.exports = localforageSerializer; + } else if (typeof define === 'function' && define.amd) { + define('localforageSerializer', function() { + return localforageSerializer; + }); + } else { + this.localforageSerializer = localforageSerializer; + } +}).call(window); +// Some code originally from async_storage.js in +// [Gaia](https://github.com/mozilla-b2g/gaia). +(function() { + 'use strict'; + + // Originally found in https://github.com/mozilla-b2g/gaia/blob/e8f624e4cc9ea945727278039b3bc9bcb9f8667a/shared/js/async_storage.js + + // Promises! + var Promise = (typeof module !== 'undefined' && module.exports) ? + require('promise') : this.Promise; + + // Initialize IndexedDB; fall back to vendor-prefixed versions if needed. + var indexedDB = indexedDB || this.indexedDB || this.webkitIndexedDB || + this.mozIndexedDB || this.OIndexedDB || + this.msIndexedDB; + + // If IndexedDB isn't available, we get outta here! + if (!indexedDB) { + return; + } + + // Open the IndexedDB database (automatically creates one if one didn't + // previously exist), using any options set in the config. + function _initStorage(options) { + var self = this; + var dbInfo = { + db: null + }; + + if (options) { + for (var i in options) { + dbInfo[i] = options[i]; + } + } + + return new Promise(function(resolve, reject) { + var openreq = indexedDB.open(dbInfo.name, dbInfo.version); + openreq.onerror = function() { + reject(openreq.error); + }; + openreq.onupgradeneeded = function() { + // First time setup: create an empty object store + openreq.result.createObjectStore(dbInfo.storeName); + }; + openreq.onsuccess = function() { + dbInfo.db = openreq.result; + self._dbInfo = dbInfo; + resolve(); + }; + }); + } + + function getItem(key, callback) { + var self = this; + + // Cast the key to a string, as that's all we can set as a key. + if (typeof key !== 'string') { + window.console.warn(key + + ' used as a key, but it is not a string.'); + key = String(key); + } + + var promise = new Promise(function(resolve, reject) { + self.ready().then(function() { + var dbInfo = self._dbInfo; + var store = dbInfo.db.transaction(dbInfo.storeName, 'readonly') + .objectStore(dbInfo.storeName); + var req = store.get(key); + + req.onsuccess = function() { + var value = req.result; + if (value === undefined) { + value = null; + } + + resolve(value); + }; + + req.onerror = function() { + reject(req.error); + }; + })["catch"](reject); + }); + + executeDeferedCallback(promise, callback); + return promise; + } + + // Iterate over all items stored in database. + function iterate(iterator, callback) { + var self = this; + + var promise = new Promise(function(resolve, reject) { + self.ready().then(function() { + var dbInfo = self._dbInfo; + var store = dbInfo.db.transaction(dbInfo.storeName, 'readonly') + .objectStore(dbInfo.storeName); + + var req = store.openCursor(); + var iterationNumber = 1; + + req.onsuccess = function() { + var cursor = req.result; + + if (cursor) { + var result = iterator(cursor.value, cursor.key, iterationNumber++); + + if (result !== void(0)) { + resolve(result); + } else { + cursor["continue"](); + } + } else { + resolve(); + } + }; + + req.onerror = function() { + reject(req.error); + }; + })["catch"](reject); + }); + + executeDeferedCallback(promise, callback); + + return promise; + } + + function setItem(key, value, callback) { + var self = this; + + // Cast the key to a string, as that's all we can set as a key. + if (typeof key !== 'string') { + window.console.warn(key + + ' used as a key, but it is not a string.'); + key = String(key); + } + + var promise = new Promise(function(resolve, reject) { + self.ready().then(function() { + var dbInfo = self._dbInfo; + var transaction = dbInfo.db.transaction(dbInfo.storeName, 'readwrite'); + var store = transaction.objectStore(dbInfo.storeName); + + // The reason we don't _save_ null is because IE 10 does + // not support saving the `null` type in IndexedDB. How + // ironic, given the bug below! + // See: https://github.com/mozilla/localForage/issues/161 + if (value === null) { + value = undefined; + } + + var req = store.put(value, key); + transaction.oncomplete = function() { + // Cast to undefined so the value passed to + // callback/promise is the same as what one would get out + // of `getItem()` later. This leads to some weirdness + // (setItem('foo', undefined) will return `null`), but + // it's not my fault localStorage is our baseline and that + // it's weird. + if (value === undefined) { + value = null; + } + + resolve(value); + }; + transaction.onabort = transaction.onerror = function() { + reject(req.error); + }; + })["catch"](reject); + }); + + executeDeferedCallback(promise, callback); + return promise; + } + + function removeItem(key, callback) { + var self = this; + + // Cast the key to a string, as that's all we can set as a key. + if (typeof key !== 'string') { + window.console.warn(key + + ' used as a key, but it is not a string.'); + key = String(key); + } + + var promise = new Promise(function(resolve, reject) { + self.ready().then(function() { + var dbInfo = self._dbInfo; + var transaction = dbInfo.db.transaction(dbInfo.storeName, 'readwrite'); + var store = transaction.objectStore(dbInfo.storeName); + + // We use a Grunt task to make this safe for IE and some + // versions of Android (including those used by Cordova). + // Normally IE won't like `.delete()` and will insist on + // using `['delete']()`, but we have a build step that + // fixes this for us now. + var req = store["delete"](key); + transaction.oncomplete = function() { + resolve(); + }; + + transaction.onerror = function() { + reject(req.error); + }; + + // The request will be aborted if we've exceeded our storage + // space. In this case, we will reject with a specific + // "QuotaExceededError". + transaction.onabort = function(event) { + var error = event.target.error; + if (error === 'QuotaExceededError') { + reject(error); + } + }; + })["catch"](reject); + }); + + executeDeferedCallback(promise, callback); + return promise; + } + + function clear(callback) { + var self = this; + + var promise = new Promise(function(resolve, reject) { + self.ready().then(function() { + var dbInfo = self._dbInfo; + var transaction = dbInfo.db.transaction(dbInfo.storeName, 'readwrite'); + var store = transaction.objectStore(dbInfo.storeName); + var req = store.clear(); + + transaction.oncomplete = function() { + resolve(); + }; + + transaction.onabort = transaction.onerror = function() { + reject(req.error); + }; + })["catch"](reject); + }); + + executeDeferedCallback(promise, callback); + return promise; + } + + function length(callback) { + var self = this; + + var promise = new Promise(function(resolve, reject) { + self.ready().then(function() { + var dbInfo = self._dbInfo; + var store = dbInfo.db.transaction(dbInfo.storeName, 'readonly') + .objectStore(dbInfo.storeName); + var req = store.count(); + + req.onsuccess = function() { + resolve(req.result); + }; + + req.onerror = function() { + reject(req.error); + }; + })["catch"](reject); + }); + + executeCallback(promise, callback); + return promise; + } + + function key(n, callback) { + var self = this; + + var promise = new Promise(function(resolve, reject) { + if (n < 0) { + resolve(null); + + return; + } + + self.ready().then(function() { + var dbInfo = self._dbInfo; + var store = dbInfo.db.transaction(dbInfo.storeName, 'readonly') + .objectStore(dbInfo.storeName); + + var advanced = false; + var req = store.openCursor(); + req.onsuccess = function() { + var cursor = req.result; + if (!cursor) { + // this means there weren't enough keys + resolve(null); + + return; + } + + if (n === 0) { + // We have the first key, return it if that's what they + // wanted. + resolve(cursor.key); + } else { + if (!advanced) { + // Otherwise, ask the cursor to skip ahead n + // records. + advanced = true; + cursor.advance(n); + } else { + // When we get here, we've got the nth key. + resolve(cursor.key); + } + } + }; + + req.onerror = function() { + reject(req.error); + }; + })["catch"](reject); + }); + + executeCallback(promise, callback); + return promise; + } + + function keys(callback) { + var self = this; + + var promise = new Promise(function(resolve, reject) { + self.ready().then(function() { + var dbInfo = self._dbInfo; + var store = dbInfo.db.transaction(dbInfo.storeName, 'readonly') + .objectStore(dbInfo.storeName); + + var req = store.openCursor(); + var keys = []; + + req.onsuccess = function() { + var cursor = req.result; + + if (!cursor) { + resolve(keys); + return; + } + + keys.push(cursor.key); + cursor["continue"](); + }; + + req.onerror = function() { + reject(req.error); + }; + })["catch"](reject); + }); + + executeCallback(promise, callback); + return promise; + } + + function executeCallback(promise, callback) { + if (callback) { + promise.then(function(result) { + callback(null, result); + }, function(error) { + callback(error); + }); + } + } + + function executeDeferedCallback(promise, callback) { + if (callback) { + promise.then(function(result) { + deferCallback(callback, result); + }, function(error) { + callback(error); + }); + } + } + + // Under Chrome the callback is called before the changes (save, clear) + // are actually made. So we use a defer function which wait that the + // call stack to be empty. + // For more info : https://github.com/mozilla/localForage/issues/175 + // Pull request : https://github.com/mozilla/localForage/pull/178 + function deferCallback(callback, result) { + if (callback) { + return setTimeout(function() { + return callback(null, result); + }, 0); + } + } + + var asyncStorage = { + _driver: 'asyncStorage', + _initStorage: _initStorage, + iterate: iterate, + getItem: getItem, + setItem: setItem, + removeItem: removeItem, + clear: clear, + length: length, + key: key, + keys: keys + }; + + if (typeof module !== 'undefined' && module.exports) { + module.exports = asyncStorage; + } else if (typeof define === 'function' && define.amd) { + define('asyncStorage', function() { + return asyncStorage; + }); + } else { + this.asyncStorage = asyncStorage; + } +}).call(window); +// If IndexedDB isn't available, we'll fall back to localStorage. +// Note that this will have considerable performance and storage +// side-effects (all data will be serialized on save and only data that +// can be converted to a string via `JSON.stringify()` will be saved). +(function() { + 'use strict'; + + // Promises! + var Promise = (typeof module !== 'undefined' && module.exports) ? + require('promise') : this.Promise; + + var globalObject = this; + var serializer = null; + var localStorage = null; + + // If the app is running inside a Google Chrome packaged webapp, or some + // other context where localStorage isn't available, we don't use + // localStorage. This feature detection is preferred over the old + // `if (window.chrome && window.chrome.runtime)` code. + // See: https://github.com/mozilla/localForage/issues/68 + try { + // If localStorage isn't available, we get outta here! + // This should be inside a try catch + if (!this.localStorage || !('setItem' in this.localStorage)) { + return; + } + // Initialize localStorage and create a variable to use throughout + // the code. + localStorage = this.localStorage; + } catch (e) { + return; + } + + var ModuleType = { + DEFINE: 1, + EXPORT: 2, + WINDOW: 3 + }; + + // Attaching to window (i.e. no module loader) is the assumed, + // simple default. + var moduleType = ModuleType.WINDOW; + + // Find out what kind of module setup we have; if none, we'll just attach + // localForage to the main window. + if (typeof module !== 'undefined' && module.exports) { + moduleType = ModuleType.EXPORT; + } else if (typeof define === 'function' && define.amd) { + moduleType = ModuleType.DEFINE; + } + + // Config the localStorage backend, using options set in the config. + function _initStorage(options) { + var self = this; + var dbInfo = {}; + if (options) { + for (var i in options) { + dbInfo[i] = options[i]; + } + } + + dbInfo.keyPrefix = dbInfo.name + '/'; + + self._dbInfo = dbInfo; + + var serializerPromise = new Promise(function(resolve/*, reject*/) { + // We allow localForage to be declared as a module or as a + // library available without AMD/require.js. + if (moduleType === ModuleType.DEFINE) { + require(['localforageSerializer'], resolve); + } else if (moduleType === ModuleType.EXPORT) { + // Making it browserify friendly + resolve(require('./../utils/serializer')); + } else { + resolve(globalObject.localforageSerializer); + } + }); + + return serializerPromise.then(function(lib) { + serializer = lib; + return Promise.resolve(); + }); + } + + // Remove all keys from the datastore, effectively destroying all data in + // the app's key/value store! + function clear(callback) { + var self = this; + var promise = self.ready().then(function() { + var keyPrefix = self._dbInfo.keyPrefix; + + for (var i = localStorage.length - 1; i >= 0; i--) { + var key = localStorage.key(i); + + if (key.indexOf(keyPrefix) === 0) { + localStorage.removeItem(key); + } + } + }); + + executeCallback(promise, callback); + return promise; + } + + // Retrieve an item from the store. Unlike the original async_storage + // library in Gaia, we don't modify return values at all. If a key's value + // is `undefined`, we pass that value to the callback function. + function getItem(key, callback) { + var self = this; + + // Cast the key to a string, as that's all we can set as a key. + if (typeof key !== 'string') { + window.console.warn(key + + ' used as a key, but it is not a string.'); + key = String(key); + } + + var promise = self.ready().then(function() { + var dbInfo = self._dbInfo; + var result = localStorage.getItem(dbInfo.keyPrefix + key); + + // If a result was found, parse it from the serialized + // string into a JS object. If result isn't truthy, the key + // is likely undefined and we'll pass it straight to the + // callback. + if (result) { + result = serializer.deserialize(result); + } + + return result; + }); + + executeCallback(promise, callback); + return promise; + } + + // Iterate over all items in the store. + function iterate(iterator, callback) { + var self = this; + + var promise = self.ready().then(function() { + var keyPrefix = self._dbInfo.keyPrefix; + var keyPrefixLength = keyPrefix.length; + var length = localStorage.length; + + for (var i = 0; i < length; i++) { + var key = localStorage.key(i); + var value = localStorage.getItem(key); + + // If a result was found, parse it from the serialized + // string into a JS object. If result isn't truthy, the + // key is likely undefined and we'll pass it straight + // to the iterator. + if (value) { + value = serializer.deserialize(value); + } + + value = iterator(value, key.substring(keyPrefixLength), i + 1); + + if (value !== void(0)) { + return value; + } + } + }); + + executeCallback(promise, callback); + return promise; + } + + // Same as localStorage's key() method, except takes a callback. + function key(n, callback) { + var self = this; + var promise = self.ready().then(function() { + var dbInfo = self._dbInfo; + var result; + try { + result = localStorage.key(n); + } catch (error) { + result = null; + } + + // Remove the prefix from the key, if a key is found. + if (result) { + result = result.substring(dbInfo.keyPrefix.length); + } + + return result; + }); + + executeCallback(promise, callback); + return promise; + } + + function keys(callback) { + var self = this; + var promise = self.ready().then(function() { + var dbInfo = self._dbInfo; + var length = localStorage.length; + var keys = []; + + for (var i = 0; i < length; i++) { + if (localStorage.key(i).indexOf(dbInfo.keyPrefix) === 0) { + keys.push(localStorage.key(i).substring(dbInfo.keyPrefix.length)); + } + } + + return keys; + }); + + executeCallback(promise, callback); + return promise; + } + + // Supply the number of keys in the datastore to the callback function. + function length(callback) { + var self = this; + var promise = self.keys().then(function(keys) { + return keys.length; + }); + + executeCallback(promise, callback); + return promise; + } + + // Remove an item from the store, nice and simple. + function removeItem(key, callback) { + var self = this; + + // Cast the key to a string, as that's all we can set as a key. + if (typeof key !== 'string') { + window.console.warn(key + + ' used as a key, but it is not a string.'); + key = String(key); + } + + var promise = self.ready().then(function() { + var dbInfo = self._dbInfo; + localStorage.removeItem(dbInfo.keyPrefix + key); + }); + + executeCallback(promise, callback); + return promise; + } + + // Set a key's value and run an optional callback once the value is set. + // Unlike Gaia's implementation, the callback function is passed the value, + // in case you want to operate on that value only after you're sure it + // saved, or something like that. + function setItem(key, value, callback) { + var self = this; + + // Cast the key to a string, as that's all we can set as a key. + if (typeof key !== 'string') { + window.console.warn(key + + ' used as a key, but it is not a string.'); + key = String(key); + } + + var promise = self.ready().then(function() { + // Convert undefined values to null. + // https://github.com/mozilla/localForage/pull/42 + if (value === undefined) { + value = null; + } + + // Save the original value to pass to the callback. + var originalValue = value; + + return new Promise(function(resolve, reject) { + serializer.serialize(value, function(value, error) { + if (error) { + reject(error); + } else { + try { + var dbInfo = self._dbInfo; + localStorage.setItem(dbInfo.keyPrefix + key, value); + resolve(originalValue); + } catch (e) { + // localStorage capacity exceeded. + // TODO: Make this a specific error/event. + if (e.name === 'QuotaExceededError' || + e.name === 'NS_ERROR_DOM_QUOTA_REACHED') { + reject(e); + } + reject(e); + } + } + }); + }); + }); + + executeCallback(promise, callback); + return promise; + } + + function executeCallback(promise, callback) { + if (callback) { + promise.then(function(result) { + callback(null, result); + }, function(error) { + callback(error); + }); + } + } + + var localStorageWrapper = { + _driver: 'localStorageWrapper', + _initStorage: _initStorage, + // Default API, from Gaia/localStorage. + iterate: iterate, + getItem: getItem, + setItem: setItem, + removeItem: removeItem, + clear: clear, + length: length, + key: key, + keys: keys + }; + + if (moduleType === ModuleType.EXPORT) { + module.exports = localStorageWrapper; + } else if (moduleType === ModuleType.DEFINE) { + define('localStorageWrapper', function() { + return localStorageWrapper; + }); + } else { + this.localStorageWrapper = localStorageWrapper; + } +}).call(window); +/* + * Includes code from: + * + * base64-arraybuffer + * https://github.com/niklasvh/base64-arraybuffer + * + * Copyright (c) 2012 Niklas von Hertzen + * Licensed under the MIT license. + */ +(function() { + 'use strict'; + + // Promises! + var Promise = (typeof module !== 'undefined' && module.exports) ? + require('promise') : this.Promise; + + var globalObject = this; + var serializer = null; + var openDatabase = this.openDatabase; + + // If WebSQL methods aren't available, we can stop now. + if (!openDatabase) { + return; + } + + var ModuleType = { + DEFINE: 1, + EXPORT: 2, + WINDOW: 3 + }; + + // Attaching to window (i.e. no module loader) is the assumed, + // simple default. + var moduleType = ModuleType.WINDOW; + + // Find out what kind of module setup we have; if none, we'll just attach + // localForage to the main window. + if (typeof module !== 'undefined' && module.exports) { + moduleType = ModuleType.EXPORT; + } else if (typeof define === 'function' && define.amd) { + moduleType = ModuleType.DEFINE; + } + + // Open the WebSQL database (automatically creates one if one didn't + // previously exist), using any options set in the config. + function _initStorage(options) { + var self = this; + var dbInfo = { + db: null + }; + + if (options) { + for (var i in options) { + dbInfo[i] = typeof(options[i]) !== 'string' ? + options[i].toString() : options[i]; + } + } + + var serializerPromise = new Promise(function(resolve/*, reject*/) { + // We allow localForage to be declared as a module or as a + // library available without AMD/require.js. + if (moduleType === ModuleType.DEFINE) { + require(['localforageSerializer'], resolve); + } else if (moduleType === ModuleType.EXPORT) { + // Making it browserify friendly + resolve(require('./../utils/serializer')); + } else { + resolve(globalObject.localforageSerializer); + } + }); + + var dbInfoPromise = new Promise(function(resolve, reject) { + // Open the database; the openDatabase API will automatically + // create it for us if it doesn't exist. + try { + dbInfo.db = openDatabase(dbInfo.name, String(dbInfo.version), + dbInfo.description, dbInfo.size); + } catch (e) { + return self.setDriver(self.LOCALSTORAGE).then(function() { + return self._initStorage(options); +}).then(resolve)["catch"](reject); + } + + // Create our key/value table if it doesn't exist. + dbInfo.db.transaction(function(t) { + t.executeSql('CREATE TABLE IF NOT EXISTS ' + dbInfo.storeName + + ' (id INTEGER PRIMARY KEY, key unique, value)', [], + function() { + self._dbInfo = dbInfo; + resolve(); + }, function(t, error) { + reject(error); + }); + }); + }); + + return serializerPromise.then(function(lib) { + serializer = lib; + return dbInfoPromise; + }); + } + + function getItem(key, callback) { + var self = this; + + // Cast the key to a string, as that's all we can set as a key. + if (typeof key !== 'string') { + window.console.warn(key + + ' used as a key, but it is not a string.'); + key = String(key); + } + + var promise = new Promise(function(resolve, reject) { + self.ready().then(function() { + var dbInfo = self._dbInfo; + dbInfo.db.transaction(function(t) { + t.executeSql('SELECT * FROM ' + dbInfo.storeName + + ' WHERE key = ? LIMIT 1', [key], + function(t, results) { + var result = results.rows.length ? + results.rows.item(0).value : null; + + // Check to see if this is serialized content we need to + // unpack. + if (result) { + result = serializer.deserialize(result); + } + + resolve(result); + }, function(t, error) { + + reject(error); + }); + }); + })["catch"](reject); + }); + + executeCallback(promise, callback); + return promise; + } + + function iterate(iterator, callback) { + var self = this; + + var promise = new Promise(function(resolve, reject) { + self.ready().then(function() { + var dbInfo = self._dbInfo; + + dbInfo.db.transaction(function(t) { + t.executeSql('SELECT * FROM ' + dbInfo.storeName, [], + function(t, results) { + var rows = results.rows; + var length = rows.length; + + for (var i = 0; i < length; i++) { + var item = rows.item(i); + var result = item.value; + + // Check to see if this is serialized content + // we need to unpack. + if (result) { + result = serializer.deserialize(result); + } + + result = iterator(result, item.key, i + 1); + + // void(0) prevents problems with redefinition + // of `undefined`. + if (result !== void(0)) { + resolve(result); + return; + } + } + + resolve(); + }, function(t, error) { + reject(error); + }); + }); + })["catch"](reject); + }); + + executeCallback(promise, callback); + return promise; + } + + function setItem(key, value, callback) { + var self = this; + + // Cast the key to a string, as that's all we can set as a key. + if (typeof key !== 'string') { + window.console.warn(key + + ' used as a key, but it is not a string.'); + key = String(key); + } + + var promise = new Promise(function(resolve, reject) { + self.ready().then(function() { + // The localStorage API doesn't return undefined values in an + // "expected" way, so undefined is always cast to null in all + // drivers. See: https://github.com/mozilla/localForage/pull/42 + if (value === undefined) { + value = null; + } + + // Save the original value to pass to the callback. + var originalValue = value; + + serializer.serialize(value, function(value, error) { + if (error) { + reject(error); + } else { + var dbInfo = self._dbInfo; + dbInfo.db.transaction(function(t) { + t.executeSql('INSERT OR REPLACE INTO ' + + dbInfo.storeName + + ' (key, value) VALUES (?, ?)', + [key, value], function() { + resolve(originalValue); + }, function(t, error) { + reject(error); + }); + }, function(sqlError) { // The transaction failed; check + // to see if it's a quota error. + if (sqlError.code === sqlError.QUOTA_ERR) { + // We reject the callback outright for now, but + // it's worth trying to re-run the transaction. + // Even if the user accepts the prompt to use + // more storage on Safari, this error will + // be called. + // + // TODO: Try to re-run the transaction. + reject(sqlError); + } + }); + } + }); + })["catch"](reject); + }); + + executeCallback(promise, callback); + return promise; + } + + function removeItem(key, callback) { + var self = this; + + // Cast the key to a string, as that's all we can set as a key. + if (typeof key !== 'string') { + window.console.warn(key + + ' used as a key, but it is not a string.'); + key = String(key); + } + + var promise = new Promise(function(resolve, reject) { + self.ready().then(function() { + var dbInfo = self._dbInfo; + dbInfo.db.transaction(function(t) { + t.executeSql('DELETE FROM ' + dbInfo.storeName + + ' WHERE key = ?', [key], function() { + + resolve(); + }, function(t, error) { + + reject(error); + }); + }); + })["catch"](reject); + }); + + executeCallback(promise, callback); + return promise; + } + + // Deletes every item in the table. + // TODO: Find out if this resets the AUTO_INCREMENT number. + function clear(callback) { + var self = this; + + var promise = new Promise(function(resolve, reject) { + self.ready().then(function() { + var dbInfo = self._dbInfo; + dbInfo.db.transaction(function(t) { + t.executeSql('DELETE FROM ' + dbInfo.storeName, [], + function() { + resolve(); + }, function(t, error) { + reject(error); + }); + }); + })["catch"](reject); + }); + + executeCallback(promise, callback); + return promise; + } + + // Does a simple `COUNT(key)` to get the number of items stored in + // localForage. + function length(callback) { + var self = this; + + var promise = new Promise(function(resolve, reject) { + self.ready().then(function() { + var dbInfo = self._dbInfo; + dbInfo.db.transaction(function(t) { + // Ahhh, SQL makes this one soooooo easy. + t.executeSql('SELECT COUNT(key) as c FROM ' + + dbInfo.storeName, [], function(t, results) { + var result = results.rows.item(0).c; + + resolve(result); + }, function(t, error) { + + reject(error); + }); + }); + })["catch"](reject); + }); + + executeCallback(promise, callback); + return promise; + } + + // Return the key located at key index X; essentially gets the key from a + // `WHERE id = ?`. This is the most efficient way I can think to implement + // this rarely-used (in my experience) part of the API, but it can seem + // inconsistent, because we do `INSERT OR REPLACE INTO` on `setItem()`, so + // the ID of each key will change every time it's updated. Perhaps a stored + // procedure for the `setItem()` SQL would solve this problem? + // TODO: Don't change ID on `setItem()`. + function key(n, callback) { + var self = this; + + var promise = new Promise(function(resolve, reject) { + self.ready().then(function() { + var dbInfo = self._dbInfo; + dbInfo.db.transaction(function(t) { + t.executeSql('SELECT key FROM ' + dbInfo.storeName + + ' WHERE id = ? LIMIT 1', [n + 1], + function(t, results) { + var result = results.rows.length ? + results.rows.item(0).key : null; + resolve(result); + }, function(t, error) { + reject(error); + }); + }); + })["catch"](reject); + }); + + executeCallback(promise, callback); + return promise; + } + + function keys(callback) { + var self = this; + + var promise = new Promise(function(resolve, reject) { + self.ready().then(function() { + var dbInfo = self._dbInfo; + dbInfo.db.transaction(function(t) { + t.executeSql('SELECT key FROM ' + dbInfo.storeName, [], + function(t, results) { + var keys = []; + + for (var i = 0; i < results.rows.length; i++) { + keys.push(results.rows.item(i).key); + } + + resolve(keys); + }, function(t, error) { + + reject(error); + }); + }); + })["catch"](reject); + }); + + executeCallback(promise, callback); + return promise; + } + + function executeCallback(promise, callback) { + if (callback) { + promise.then(function(result) { + callback(null, result); + }, function(error) { + callback(error); + }); + } + } + + var webSQLStorage = { + _driver: 'webSQLStorage', + _initStorage: _initStorage, + iterate: iterate, + getItem: getItem, + setItem: setItem, + removeItem: removeItem, + clear: clear, + length: length, + key: key, + keys: keys + }; + + if (moduleType === ModuleType.DEFINE) { + define('webSQLStorage', function() { + return webSQLStorage; + }); + } else if (moduleType === ModuleType.EXPORT) { + module.exports = webSQLStorage; + } else { + this.webSQLStorage = webSQLStorage; + } +}).call(window); +(function() { + 'use strict'; + + // Promises! + var Promise = (typeof module !== 'undefined' && module.exports) ? + require('promise') : this.Promise; + + // Custom drivers are stored here when `defineDriver()` is called. + // They are shared across all instances of localForage. + var CustomDrivers = {}; + + var DriverType = { + INDEXEDDB: 'asyncStorage', + LOCALSTORAGE: 'localStorageWrapper', + WEBSQL: 'webSQLStorage' + }; + + var DefaultDriverOrder = [ + DriverType.INDEXEDDB, + DriverType.WEBSQL, + DriverType.LOCALSTORAGE + ]; + + var LibraryMethods = [ + 'clear', + 'getItem', + 'iterate', + 'key', + 'keys', + 'length', + 'removeItem', + 'setItem' + ]; + + var ModuleType = { + DEFINE: 1, + EXPORT: 2, + WINDOW: 3 + }; + + var DefaultConfig = { + description: '', + driver: DefaultDriverOrder.slice(), + name: 'localforage', + // Default DB size is _JUST UNDER_ 5MB, as it's the highest size + // we can use without a prompt. + size: 4980736, + storeName: 'keyvaluepairs', + version: 1.0 + }; + + // Attaching to window (i.e. no module loader) is the assumed, + // simple default. + var moduleType = ModuleType.WINDOW; + + // Find out what kind of module setup we have; if none, we'll just attach + // localForage to the main window. + if (typeof module !== 'undefined' && module.exports) { + moduleType = ModuleType.EXPORT; + } else if (typeof define === 'function' && define.amd) { + moduleType = ModuleType.DEFINE; + } + + // Check to see if IndexedDB is available and if it is the latest + // implementation; it's our preferred backend library. We use "_spec_test" + // as the name of the database because it's not the one we'll operate on, + // but it's useful to make sure its using the right spec. + // See: https://github.com/mozilla/localForage/issues/128 + var driverSupport = (function(self) { + // Initialize IndexedDB; fall back to vendor-prefixed versions + // if needed. + var indexedDB = indexedDB || self.indexedDB || self.webkitIndexedDB || + self.mozIndexedDB || self.OIndexedDB || + self.msIndexedDB; + + var result = {}; + + result[DriverType.WEBSQL] = !!self.openDatabase; + result[DriverType.INDEXEDDB] = !!(function() { + // We mimic PouchDB here; just UA test for Safari (which, as of + // iOS 8/Yosemite, doesn't properly support IndexedDB). + // IndexedDB support is broken and different from Blink's. + // This is faster than the test case (and it's sync), so we just + // do this. *SIGH* + // http://bl.ocks.org/nolanlawson/raw/c83e9039edf2278047e9/ + // + // We test for openDatabase because IE Mobile identifies itself + // as Safari. Oh the lulz... + if (typeof self.openDatabase !== 'undefined' && self.navigator && + self.navigator.userAgent && + /Safari/.test(self.navigator.userAgent) && + !/Chrome/.test(self.navigator.userAgent)) { + return false; + } + try { + return indexedDB && + typeof indexedDB.open === 'function' && + // Some Samsung/HTC Android 4.0-4.3 devices + // have older IndexedDB specs; if this isn't available + // their IndexedDB is too old for us to use. + // (Replaces the onupgradeneeded test.) + typeof self.IDBKeyRange !== 'undefined'; + } catch (e) { + return false; + } + })(); + + result[DriverType.LOCALSTORAGE] = !!(function() { + try { + return (self.localStorage && + ('setItem' in self.localStorage) && + (self.localStorage.setItem)); + } catch (e) { + return false; + } + })(); + + return result; + })(this); + + var isArray = Array.isArray || function(arg) { + return Object.prototype.toString.call(arg) === '[object Array]'; + }; + + function callWhenReady(localForageInstance, libraryMethod) { + localForageInstance[libraryMethod] = function() { + var _args = arguments; + return localForageInstance.ready().then(function() { + return localForageInstance[libraryMethod].apply(localForageInstance, _args); + }); + }; + } + + function extend() { + for (var i = 1; i < arguments.length; i++) { + var arg = arguments[i]; + + if (arg) { + for (var key in arg) { + if (arg.hasOwnProperty(key)) { + if (isArray(arg[key])) { + arguments[0][key] = arg[key].slice(); + } else { + arguments[0][key] = arg[key]; + } + } + } + } + } + + return arguments[0]; + } + + function isLibraryDriver(driverName) { + for (var driver in DriverType) { + if (DriverType.hasOwnProperty(driver) && + DriverType[driver] === driverName) { + return true; + } + } + + return false; + } + + var globalObject = this; + + function LocalForage(options) { + this._config = extend({}, DefaultConfig, options); + this._driverSet = null; + this._ready = false; + this._dbInfo = null; + + // Add a stub for each driver API method that delays the call to the + // corresponding driver method until localForage is ready. These stubs + // will be replaced by the driver methods as soon as the driver is + // loaded, so there is no performance impact. + for (var i = 0; i < LibraryMethods.length; i++) { + callWhenReady(this, LibraryMethods[i]); + } + + this.setDriver(this._config.driver); + } + + LocalForage.prototype.INDEXEDDB = DriverType.INDEXEDDB; + LocalForage.prototype.LOCALSTORAGE = DriverType.LOCALSTORAGE; + LocalForage.prototype.WEBSQL = DriverType.WEBSQL; + + // Set any config values for localForage; can be called anytime before + // the first API call (e.g. `getItem`, `setItem`). + // We loop through options so we don't overwrite existing config + // values. + LocalForage.prototype.config = function(options) { + // If the options argument is an object, we use it to set values. + // Otherwise, we return either a specified config value or all + // config values. + if (typeof(options) === 'object') { + // If localforage is ready and fully initialized, we can't set + // any new configuration values. Instead, we return an error. + if (this._ready) { + return new Error("Can't call config() after localforage " + + 'has been used.'); + } + + for (var i in options) { + if (i === 'storeName') { + options[i] = options[i].replace(/\W/g, '_'); + } + + this._config[i] = options[i]; + } + + // after all config options are set and + // the driver option is used, try setting it + if ('driver' in options && options.driver) { + this.setDriver(this._config.driver); + } + + return true; + } else if (typeof(options) === 'string') { + return this._config[options]; + } else { + return this._config; + } + }; + + // Used to define a custom driver, shared across all instances of + // localForage. + LocalForage.prototype.defineDriver = function(driverObject, callback, + errorCallback) { + var defineDriver = new Promise(function(resolve, reject) { + try { + var driverName = driverObject._driver; + var complianceError = new Error( + 'Custom driver not compliant; see ' + + 'https://mozilla.github.io/localForage/#definedriver' + ); + var namingError = new Error( + 'Custom driver name already in use: ' + driverObject._driver + ); + + // A driver name should be defined and not overlap with the + // library-defined, default drivers. + if (!driverObject._driver) { + reject(complianceError); + return; + } + if (isLibraryDriver(driverObject._driver)) { + reject(namingError); + return; + } + + var customDriverMethods = LibraryMethods.concat('_initStorage'); + for (var i = 0; i < customDriverMethods.length; i++) { + var customDriverMethod = customDriverMethods[i]; + if (!customDriverMethod || + !driverObject[customDriverMethod] || + typeof driverObject[customDriverMethod] !== 'function') { + reject(complianceError); + return; + } + } + + var supportPromise = Promise.resolve(true); + if ('_support' in driverObject) { + if (driverObject._support && typeof driverObject._support === 'function') { + supportPromise = driverObject._support(); + } else { + supportPromise = Promise.resolve(!!driverObject._support); + } + } + + supportPromise.then(function(supportResult) { + driverSupport[driverName] = supportResult; + CustomDrivers[driverName] = driverObject; + resolve(); + }, reject); + } catch (e) { + reject(e); + } + }); + + defineDriver.then(callback, errorCallback); + return defineDriver; + }; + + LocalForage.prototype.driver = function() { + return this._driver || null; + }; + + LocalForage.prototype.ready = function(callback) { + var self = this; + + var ready = new Promise(function(resolve, reject) { + self._driverSet.then(function() { + if (self._ready === null) { + self._ready = self._initStorage(self._config); + } + + self._ready.then(resolve, reject); + })["catch"](reject); + }); + + ready.then(callback, callback); + return ready; + }; + + LocalForage.prototype.setDriver = function(drivers, callback, + errorCallback) { + var self = this; + + if (typeof drivers === 'string') { + drivers = [drivers]; + } + + this._driverSet = new Promise(function(resolve, reject) { + var driverName = self._getFirstSupportedDriver(drivers); + var error = new Error('No available storage method found.'); + + if (!driverName) { + self._driverSet = Promise.reject(error); + reject(error); + return; + } + + self._dbInfo = null; + self._ready = null; + + if (isLibraryDriver(driverName)) { + // We allow localForage to be declared as a module or as a + // library available without AMD/require.js. + if (moduleType === ModuleType.DEFINE) { + require([driverName], function(lib) { + self._extend(lib); + + resolve(); + }); + + return; + } else if (moduleType === ModuleType.EXPORT) { + // Making it browserify friendly + var driver; + switch (driverName) { + case self.INDEXEDDB: + driver = require('./drivers/indexeddb'); + break; + case self.LOCALSTORAGE: + driver = require('./drivers/localstorage'); + break; + case self.WEBSQL: + driver = require('./drivers/websql'); + } + + self._extend(driver); + } else { + self._extend(globalObject[driverName]); + } + } else if (CustomDrivers[driverName]) { + self._extend(CustomDrivers[driverName]); + } else { + self._driverSet = Promise.reject(error); + reject(error); + return; + } + + resolve(); + }); + + function setDriverToConfig() { + self._config.driver = self.driver(); + } + this._driverSet.then(setDriverToConfig, setDriverToConfig); + + this._driverSet.then(callback, errorCallback); + return this._driverSet; + }; + + LocalForage.prototype.supports = function(driverName) { + return !!driverSupport[driverName]; + }; + + LocalForage.prototype._extend = function(libraryMethodsAndProperties) { + extend(this, libraryMethodsAndProperties); + }; + + // Used to determine which driver we should use as the backend for this + // instance of localForage. + LocalForage.prototype._getFirstSupportedDriver = function(drivers) { + if (drivers && isArray(drivers)) { + for (var i = 0; i < drivers.length; i++) { + var driver = drivers[i]; + + if (this.supports(driver)) { + return driver; + } + } + } + + return null; + }; + + LocalForage.prototype.createInstance = function(options) { + return new LocalForage(options); + }; + + // The actual localForage object that we expose as a module or via a + // global. It's extended by pulling in one of our other libraries. + var localForage = new LocalForage(); + + // We allow localForage to be declared as a module or as a library + // available without AMD/require.js. + if (moduleType === ModuleType.DEFINE) { + define('localforage', function() { + return localForage; + }); + } else if (moduleType === ModuleType.EXPORT) { + module.exports = localForage; + } else { + this.localforage = localForage; + } +}).call(window); |