/files//1.3.6/store.js
JavaScript | 175 lines | 129 code | 8 blank | 38 comment | 27 complexity | 54ed01b68e6fe5731e84d2bf40b03d62 MD5 | raw file
- /* Copyright (c) 2010-2012 Marcus Westin
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
- ;(function(){
- var store = {},
- win = window,
- doc = win.document,
- localStorageName = 'localStorage',
- namespace = '__storejs__',
- storage
- store.disabled = false
- store.set = function(key, value) {}
- store.get = function(key) {}
- store.remove = function(key) {}
- store.clear = function() {}
- store.transact = function(key, defaultVal, transactionFn) {
- var val = store.get(key)
- if (transactionFn == null) {
- transactionFn = defaultVal
- defaultVal = null
- }
- if (typeof val == 'undefined') { val = defaultVal || {} }
- transactionFn(val)
- store.set(key, val)
- }
- store.getAll = function() {}
- store.serialize = function(value) {
- return JSON.stringify(value)
- }
- store.deserialize = function(value) {
- if (typeof value != 'string') { return undefined }
- try { return JSON.parse(value) }
- catch(e) { return value || undefined }
- }
- // Functions to encapsulate questionable FireFox 3.6.13 behavior
- // when about.config::dom.storage.enabled === false
- // See https://github.com/marcuswestin/store.js/issues#issue/13
- function isLocalStorageNameSupported() {
- try { return (localStorageName in win && win[localStorageName]) }
- catch(err) { return false }
- }
- if (isLocalStorageNameSupported()) {
- storage = win[localStorageName]
- store.set = function(key, val) {
- if (val === undefined) { return store.remove(key) }
- storage.setItem(key, store.serialize(val))
- return val
- }
- store.get = function(key) { return store.deserialize(storage.getItem(key)) }
- store.remove = function(key) { storage.removeItem(key) }
- store.clear = function() { storage.clear() }
- store.getAll = function() {
- var ret = {}
- for (var i=0; i<storage.length; ++i) {
- var key = storage.key(i)
- ret[key] = store.get(key)
- }
- return ret
- }
- } else if (doc.documentElement.addBehavior) {
- var storageOwner,
- storageContainer
- // Since #userData storage applies only to specific paths, we need to
- // somehow link our data to a specific path. We choose /favicon.ico
- // as a pretty safe option, since all browsers already make a request to
- // this URL anyway and being a 404 will not hurt us here. We wrap an
- // iframe pointing to the favicon in an ActiveXObject(htmlfile) object
- // (see: http://msdn.microsoft.com/en-us/library/aa752574(v=VS.85).aspx)
- // since the iframe access rules appear to allow direct access and
- // manipulation of the document element, even for a 404 page. This
- // document can be used instead of the current document (which would
- // have been limited to the current path) to perform #userData storage.
- try {
- storageContainer = new ActiveXObject('htmlfile')
- storageContainer.open()
- storageContainer.write('<s' + 'cript>document.w=window</s' + 'cript><iframe src="/favicon.ico"></frame>')
- storageContainer.close()
- storageOwner = storageContainer.w.frames[0].document
- storage = storageOwner.createElement('div')
- } catch(e) {
- // somehow ActiveXObject instantiation failed (perhaps some special
- // security settings or otherwse), fall back to per-path storage
- storage = doc.createElement('div')
- storageOwner = doc.body
- }
- function withIEStorage(storeFunction) {
- return function() {
- var args = Array.prototype.slice.call(arguments, 0)
- args.unshift(storage)
- // See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx
- // and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx
- storageOwner.appendChild(storage)
- storage.addBehavior('#default#userData')
- storage.load(localStorageName)
- var result = storeFunction.apply(store, args)
- storageOwner.removeChild(storage)
- return result
- }
- }
- // In IE7, keys may not contain special chars. See all of https://github.com/marcuswestin/store.js/issues/40
- var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g")
- function ieKeyFix(key) {
- return key.replace(forbiddenCharsRegex, '___')
- }
- store.set = withIEStorage(function(storage, key, val) {
- key = ieKeyFix(key)
- if (val === undefined) { return store.remove(key) }
- storage.setAttribute(key, store.serialize(val))
- storage.save(localStorageName)
- return val
- })
- store.get = withIEStorage(function(storage, key) {
- key = ieKeyFix(key)
- return store.deserialize(storage.getAttribute(key))
- })
- store.remove = withIEStorage(function(storage, key) {
- key = ieKeyFix(key)
- storage.removeAttribute(key)
- storage.save(localStorageName)
- })
- store.clear = withIEStorage(function(storage) {
- var attributes = storage.XMLDocument.documentElement.attributes
- storage.load(localStorageName)
- for (var i=0, attr; attr=attributes[i]; i++) {
- storage.removeAttribute(attr.name)
- }
- storage.save(localStorageName)
- })
- store.getAll = withIEStorage(function(storage) {
- var attributes = storage.XMLDocument.documentElement.attributes
- storage.load(localStorageName)
- var ret = {}
- for (var i=0, attr; attr=attributes[i]; ++i) {
- ret[attr] = store.get(attr)
- }
- return ret
- })
- }
- try {
- store.set(namespace, namespace)
- if (store.get(namespace) != namespace) { store.disabled = true }
- store.remove(namespace)
- } catch(e) {
- store.disabled = true
- }
- store.enabled = !store.disabled
- if (typeof module != 'undefined' && typeof module != 'function') { module.exports = store }
- else if (typeof define === 'function' && define.amd) { define(store) }
- else { this.store = store }
- })();