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68 lines
3.8 KiB
68 lines
3.8 KiB
/**
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* Storage plugin
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* Provides a simple interface for storing data such as user preferences.
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* Storage is useful for saving and retreiving data from the user's browser.
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* For newer browsers, localStorage is used.
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* If localStorage isn't supported, then cookies are used instead.
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* Retrievable data is limited to the same domain as this file.
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*
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* Usage:
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* This plugin extends jQuery by adding itself as a static method.
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* $.Storage - is the class name, which represents the user's data store, whether it's cookies or local storage.
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* <code>if ($.Storage)</code> will tell you if the plugin is loaded.
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* $.Storage.set("name", "value") - Stores a named value in the data store.
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* $.Storage.set({"name1":"value1", "name2":"value2", etc}) - Stores multiple name/value pairs in the data store.
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* $.Storage.get("name") - Retrieves the value of the given name from the data store.
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* $.Storage.remove("name") - Permanently deletes the name/value pair from the data store.
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*
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* @author Dave Schindler
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*
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* Distributed under the MIT License
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*
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* Copyright (c) 2010 Dave Schindler
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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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// Private data
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var isLS=typeof window.localStorage!=='undefined';
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// Private functions
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function wls(n,v){var c;if(typeof n==="string"&&typeof v==="string"){localStorage[n]=v;return true;}else if(typeof n==="object"&&typeof v==="undefined"){for(c in n){if(n.hasOwnProperty(c)){localStorage[c]=n[c];}}return true;}return false;}
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function wc(n,v){var dt,e,c;dt=new Date();dt.setTime(dt.getTime()+31536000000);e="; expires="+dt.toGMTString();if(typeof n==="string"&&typeof v==="string"){document.cookie=n+"="+v+e+"; path=/";return true;}else if(typeof n==="object"&&typeof v==="undefined"){for(c in n) {if(n.hasOwnProperty(c)){document.cookie=c+"="+n[c]+e+"; path=/";}}return true;}return false;}
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function rls(n){return localStorage[n];}
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function rc(n){var nn, ca, i, c;nn=n+"=";ca=document.cookie.split(';');for(i=0;i<ca.length;i++){c=ca[i];while(c.charAt(0)===' '){c=c.substring(1,c.length);}if(c.indexOf(nn)===0){return c.substring(nn.length,c.length);}}return null;}
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function dls(n){return delete localStorage[n];}
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function dc(n){return wc(n,"",-1);}
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/**
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* Public API
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* $.Storage - Represents the user's data store, whether it's cookies or local storage.
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* $.Storage.set("name", "value") - Stores a named value in the data store.
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* $.Storage.set({"name1":"value1", "name2":"value2", etc}) - Stores multiple name/value pairs in the data store.
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* $.Storage.get("name") - Retrieves the value of the given name from the data store.
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* $.Storage.remove("name") - Permanently deletes the name/value pair from the data store.
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*/
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$.extend({
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Storage: {
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set: isLS ? wls : wc,
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get: isLS ? rls : rc,
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remove: isLS ? dls :dc
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}
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});
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})(jQuery);
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