koha-tmpl/opac-tmpl/bootstrap/lib/enquire.min.js

   1 // enquire.js v2.0.1 - Awesome Media Queries in JavaScript
   2 // Copyright (c) 2013 Nick Williams - http://wicky.nillia.ms/enquire.js
   3 // License: MIT (http://www.opensource.org/licenses/mit-license.php)
   4
   5 (function(t){"use strict";function i(t,i){var s,n=0,e=t.length;for(n;e>n&&(s=i(t[n],n),s!==!1);n++);}function s(t){return"[object Array]"===Object.prototype.toString.apply(t)}function n(t){return"function"==typeof t}function e(t){this.options=t,!t.deferSetup&&this.setup()}function o(t,i){this.query=t,this.isUnconditional=i,this.handlers=[],this.mql=h(t);var s=this;this.listener=function(t){s.mql=t,s.assess()},this.mql.addListener(this.listener)}function r(){if(!h)throw Error("matchMedia not present, legacy browsers require a polyfill");this.queries={},this.browserIsIncapable=!h("only all").matches}var h=t.matchMedia;e.prototype={setup:function(){this.options.setup&&this.options.setup(),this.initialised=!0},on:function(){!this.initialised&&this.setup(),this.options.match&&this.options.match()},off:function(){this.options.unmatch&&this.options.unmatch()},destroy:function(){this.options.destroy?this.options.destroy():this.off()},equals:function(t){return this.options===t||this.options.match===t}},o.prototype={addHandler:function(t){var i=new e(t);this.handlers.push(i),this.matches()&&i.on()},removeHandler:function(t){var s=this.handlers;i(s,function(i,n){return i.equals(t)?(i.destroy(),!s.splice(n,1)):void 0})},matches:function(){return this.mql.matches||this.isUnconditional},clear:function(){i(this.handlers,function(t){t.destroy()}),this.mql.removeListener(this.listener),this.handlers.length=0},assess:function(){var t=this.matches()?"on":"off";i(this.handlers,function(i){i[t]()})}},r.prototype={register:function(t,e,r){var h=this.queries,a=r&&this.browserIsIncapable;return h[t]||(h[t]=new o(t,a)),n(e)&&(e={match:e}),s(e)||(e=[e]),i(e,function(i){h[t].addHandler(i)}),this},unregister:function(t,i){var s=this.queries[t];return s&&(i?s.removeHandler(i):(s.clear(),delete this.queries[t])),this}},t.enquire=t.enquire||new r})(this);