111 lines
4.4 KiB
JavaScript
111 lines
4.4 KiB
JavaScript
/* Copyright (c) 2010 Marcus Westin
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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(function($) {
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$.store = (function(){
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var api = {},
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win = window,
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doc = win.document,
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localStorageName = 'localStorage',
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globalStorageName = 'globalStorage',
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storage,
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rInvalidIeChars = /(\s|\/)/g;
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api.set = function(key, value) {};
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api.get = function(key) {};
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api.remove = function(key) {};
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api.clear = function() {};
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api.transact = function(key, transactionFn) {
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var val = api.get(key);
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if (typeof val == 'undefined') { val = {}; }
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transactionFn(val);
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api.set(key, val);
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};
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api.serialize = function(value) {
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return JSON.stringify(value);
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};
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api.deserialize = function(value) {
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if (typeof value != 'string') { return undefined; }
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return JSON.parse(value);
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};
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if (localStorageName in win && win[localStorageName]) {
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storage = win[localStorageName];
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api.set = function(key, val) { storage.setItem(key, api.serialize(val)); }
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api.get = function(key) { return api.deserialize(storage.getItem(key)); }
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api.remove = function(key) { storage.removeItem(key); }
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api.clear = function() { storage.clear(); }
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} else if (globalStorageName in win && win[globalStorageName]) {
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storage = win[globalStorageName][win.location.hostname];
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api.set = function(key, val) { storage[key] = api.serialize(val); }
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api.get = function(key) { return api.deserialize(storage[key] && storage[key].value); }
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api.remove = function(key) { delete storage[key]; }
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api.clear = function() { for (var key in storage ) { delete storage[key]; } }
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} else if (doc.documentElement.addBehavior) {
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var storage = doc.createElement('div');
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function withIEStorage(storeFunction) {
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return function() {
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var args = Array.prototype.slice.call(arguments, 0);
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args.unshift(storage);
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// See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx
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// and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx
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// workaroud for an IE bug that does not allow slashes or whitespace in userData keys
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if (args[1] && args[1].match && args[1].match(rInvalidIeChars)) {
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// get rid of whitespace and invalid charicters
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args[1] = args[1].replace(rInvalidIeChars, '');
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}
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doc.body.appendChild(storage);
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storage.addBehavior('#default#userData');
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storage.load(localStorageName);
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var result = storeFunction.apply(api, args);
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doc.body.removeChild(storage);
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return result;
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}
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}
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api.set = withIEStorage(function(storage, key, val) {
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storage.setAttribute(key, api.serialize(val));
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storage.save(localStorageName);
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})
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api.get = withIEStorage(function(storage, key) {
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return api.deserialize(storage.getAttribute(key));
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})
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api.remove = withIEStorage(function(storage, key) {
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storage.removeAttribute(key);
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storage.save(localStorageName);
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})
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api.clear = withIEStorage(function(storage) {
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var attributes = storage.XMLDocument.documentElement.attributes;
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storage.load(localStorageName);
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for (var i=0, attr; attr = attributes[i]; i++) {
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storage.removeAttribute(attr.name);
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}
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storage.save(localStorageName);
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})
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}
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return api;
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})();
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})(jQuery); |