define(["css!./loading-lite"], function() {
    "use strict";
    var loadingElem, layer1, layer2, layer3, layer4, circleLefts, circleRights;
    return {
        show: function() {
            var elem = loadingElem;
            elem || (elem = document.createElement("div"), loadingElem = elem, elem.classList.add("docspinner"), elem.classList.add("mdl-spinner"), elem.innerHTML = '<div class="mdl-spinner__layer mdl-spinner__layer-1"><div class="mdl-spinner__circle-clipper mdl-spinner__left"><div class="mdl-spinner__circle mdl-spinner__circleLeft"></div></div><div class="mdl-spinner__circle-clipper mdl-spinner__right"><div class="mdl-spinner__circle mdl-spinner__circleRight"></div></div></div><div class="mdl-spinner__layer mdl-spinner__layer-2"><div class="mdl-spinner__circle-clipper mdl-spinner__left"><div class="mdl-spinner__circle mdl-spinner__circleLeft"></div></div><div class="mdl-spinner__circle-clipper mdl-spinner__right"><div class="mdl-spinner__circle mdl-spinner__circleRight"></div></div></div><div class="mdl-spinner__layer mdl-spinner__layer-3"><div class="mdl-spinner__circle-clipper mdl-spinner__left"><div class="mdl-spinner__circle mdl-spinner__circleLeft"></div></div><div class="mdl-spinner__circle-clipper mdl-spinner__right"><div class="mdl-spinner__circle mdl-spinner__circleRight"></div></div></div><div class="mdl-spinner__layer mdl-spinner__layer-4"><div class="mdl-spinner__circle-clipper mdl-spinner__left"><div class="mdl-spinner__circle mdl-spinner__circleLeft"></div></div><div class="mdl-spinner__circle-clipper mdl-spinner__right"><div class="mdl-spinner__circle mdl-spinner__circleRight"></div></div></div>', document.body.appendChild(elem), layer1 = elem.querySelector(".mdl-spinner__layer-1"), layer2 = elem.querySelector(".mdl-spinner__layer-2"), layer3 = elem.querySelector(".mdl-spinner__layer-3"), layer4 = elem.querySelector(".mdl-spinner__layer-4"), circleLefts = elem.querySelectorAll(".mdl-spinner__circleLeft"), circleRights = elem.querySelectorAll(".mdl-spinner__circleRight")), elem.classList.add("mdlSpinnerActive"), layer1.classList.add("mdl-spinner__layer-1-active"), layer2.classList.add("mdl-spinner__layer-2-active"), layer3.classList.add("mdl-spinner__layer-3-active"), layer4.classList.add("mdl-spinner__layer-4-active");
            var i, length;
            for (i = 0, length = circleLefts.length; i < length; i++) circleLefts[i].classList.add("mdl-spinner__circleLeft-active");
            for (i = 0, length = circleRights.length; i < length; i++) circleRights[i].classList.add("mdl-spinner__circleRight-active")
        },
        hide: function() {
            var elem = loadingElem;
            if (elem) {
                elem.classList.remove("mdlSpinnerActive"), elem.classList.remove("mdl-spinner__layer-1-active"), elem.classList.remove("mdl-spinner__layer-2-active"), elem.classList.remove("mdl-spinner__layer-3-active"), elem.classList.remove("mdl-spinner__layer-4-active");
                var i, length;
                for (i = 0, length = circleLefts.length; i < length; i++) circleLefts[i].classList.remove("mdl-spinner__circleLeft-active");
                for (i = 0, length = circleRights.length; i < length; i++) circleRights[i].classList.remove("mdl-spinner__circleRight-active")
            }
        }
    }
});