91 lines
3.6 KiB
JavaScript
91 lines
3.6 KiB
JavaScript
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/*! Widget: storage - updated 3/1/2016 (v2.25.5) */
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/*global JSON:false */
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;(function ($, window, document) {
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'use strict';
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var ts = $.tablesorter || {};
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// *** Store data in local storage, with a cookie fallback ***
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/* IE7 needs JSON library for JSON.stringify - (http://caniuse.com/#search=json)
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if you need it, then include https://github.com/douglascrockford/JSON-js
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$.parseJSON is not available is jQuery versions older than 1.4.1, using older
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versions will only allow storing information for one page at a time
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// *** Save data (JSON format only) ***
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// val must be valid JSON... use http://jsonlint.com/ to ensure it is valid
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var val = { "mywidget" : "data1" }; // valid JSON uses double quotes
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// $.tablesorter.storage(table, key, val);
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$.tablesorter.storage(table, 'tablesorter-mywidget', val);
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// *** Get data: $.tablesorter.storage(table, key); ***
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v = $.tablesorter.storage(table, 'tablesorter-mywidget');
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// val may be empty, so also check for your data
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val = (v && v.hasOwnProperty('mywidget')) ? v.mywidget : '';
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alert(val); // 'data1' if saved, or '' if not
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*/
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ts.storage = function(table, key, value, options) {
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table = $(table)[0];
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var cookieIndex, cookies, date,
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hasStorage = false,
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values = {},
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c = table.config,
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wo = c && c.widgetOptions,
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storageType = ( options && options.useSessionStorage ) || ( wo && wo.storage_useSessionStorage ) ?
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'sessionStorage' : 'localStorage',
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$table = $(table),
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// id from (1) options ID, (2) table 'data-table-group' attribute, (3) widgetOptions.storage_tableId,
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// (4) table ID, then (5) table index
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id = options && options.id ||
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$table.attr( options && options.group || wo && wo.storage_group || 'data-table-group') ||
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wo && wo.storage_tableId || table.id || $('.tablesorter').index( $table ),
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// url from (1) options url, (2) table 'data-table-page' attribute, (3) widgetOptions.storage_fixedUrl,
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// (4) table.config.fixedUrl (deprecated), then (5) window location path
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url = options && options.url ||
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$table.attr(options && options.page || wo && wo.storage_page || 'data-table-page') ||
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wo && wo.storage_fixedUrl || c && c.fixedUrl || window.location.pathname;
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// https://gist.github.com/paulirish/5558557
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if (storageType in window) {
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try {
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window[storageType].setItem('_tmptest', 'temp');
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hasStorage = true;
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window[storageType].removeItem('_tmptest');
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} catch (error) {
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if (c && c.debug) {
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console.warn( storageType + ' is not supported in this browser' );
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}
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}
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}
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// *** get value ***
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if ($.parseJSON) {
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if (hasStorage) {
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values = $.parseJSON( window[storageType][key] || 'null' ) || {};
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} else {
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// old browser, using cookies
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cookies = document.cookie.split(/[;\s|=]/);
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// add one to get from the key to the value
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cookieIndex = $.inArray(key, cookies) + 1;
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values = (cookieIndex !== 0) ? $.parseJSON(cookies[cookieIndex] || 'null') || {} : {};
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}
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}
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// allow value to be an empty string too
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if (typeof value !== 'undefined' && window.JSON && JSON.hasOwnProperty('stringify')) {
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// add unique identifiers = url pathname > table ID/index on page > data
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if (!values[url]) {
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values[url] = {};
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}
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values[url][id] = value;
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// *** set value ***
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if (hasStorage) {
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window[storageType][key] = JSON.stringify(values);
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} else {
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date = new Date();
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date.setTime(date.getTime() + (31536e+6)); // 365 days
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document.cookie = key + '=' + (JSON.stringify(values)).replace(/\"/g, '\"') + '; expires=' + date.toGMTString() + '; path=/';
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}
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} else {
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return values && values[url] ? values[url][id] : '';
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}
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};
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})(jQuery, window, document);
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