/*!
 * Scroll Lock v3.1.3
 * https://github.com/MohammadYounes/jquery-scrollLock
 *
 * Copyright (c) 2017 Mohammad Younes
 * Licensed under GPL 3.
 */
(function(n){typeof define=="function"&&define.amd?define(["jquery"],n):n(jQuery)})(function(n){"use strict";var i={space:32,pageup:33,pagedown:34,end:35,home:36,up:38,down:40},r=function(t,i){var u=i.scrollTop(),h=i.prop("scrollHeight"),c=i.prop("clientHeight"),f=t.originalEvent.wheelDelta||-1*t.originalEvent.detail||-1*t.originalEvent.deltaY,r=0,e,o,s;return t.type==="wheel"?(e=i.height()/n(window).height(),r=t.originalEvent.deltaY*e):this.options.touch&&t.type==="touchmove"&&(f=t.originalEvent.changedTouches[0].clientY-this.startClientY),s=(o=f>0&&u+r<=0)||f<0&&u+r>=h-c,{prevent:s,top:o,scrollTop:u,deltaY:r}},u=function(n,t){var u=t.scrollTop(),r={top:!1,bottom:!1},f,e;return r.top=u===0&&(n.keyCode===i.pageup||n.keyCode===i.home||n.keyCode===i.up),r.top||(f=t.prop("scrollHeight"),e=t.prop("clientHeight"),r.bottom=f===u+e&&(n.keyCode===i.space||n.keyCode===i.pagedown||n.keyCode===i.end||n.keyCode===i.down)),r},t=function(i,r){if(this.$element=i,this.options=n.extend({},t.DEFAULTS,this.$element.data(),r),this.enabled=!0,this.startClientY=0,this.options.unblock)this.$element.on(t.CORE.wheelEventName+t.NAMESPACE,this.options.unblock,n.proxy(t.CORE.unblockHandler,this));this.$element.on(t.CORE.wheelEventName+t.NAMESPACE,this.options.selector,n.proxy(t.CORE.handler,this));if(this.options.touch){this.$element.on("touchstart"+t.NAMESPACE,this.options.selector,n.proxy(t.CORE.touchHandler,this));this.$element.on("touchmove"+t.NAMESPACE,this.options.selector,n.proxy(t.CORE.handler,this));if(this.options.unblock)this.$element.on("touchmove"+t.NAMESPACE,this.options.unblock,n.proxy(t.CORE.unblockHandler,this))}if(this.options.keyboard){this.$element.attr("tabindex",this.options.keyboard.tabindex||0);this.$element.on("keydown"+t.NAMESPACE,this.options.selector,n.proxy(t.CORE.keyboardHandler,this));if(this.options.unblock)this.$element.on("keydown"+t.NAMESPACE,this.options.unblock,n.proxy(t.CORE.unblockHandler,this))}},f;t.NAME="ScrollLock";t.VERSION="3.1.2";t.NAMESPACE=".scrollLock";t.ANIMATION_NAMESPACE=t.NAMESPACE+".effect";t.DEFAULTS={strict:!1,strictFn:function(n){return n.prop("scrollHeight")>n.prop("clientHeight")},selector:!1,animation:!1,touch:"ontouchstart"in window,keyboard:!1,unblock:!1};t.CORE={wheelEventName:"onwheel"in document.createElement("div")?"wheel":document.onmousewheel!==undefined?"mousewheel":"DOMMouseScroll",animationEventName:["webkitAnimationEnd","mozAnimationEnd","MSAnimationEnd","oanimationend","animationend"].join(t.ANIMATION_NAMESPACE+" ")+t.ANIMATION_NAMESPACE,unblockHandler:function(n){n.__currentTarget=n.currentTarget},handler:function(i){var f,u,e;this.enabled&&!i.ctrlKey&&(f=n(i.currentTarget),(this.options.strict!==!0||this.options.strictFn(f))&&(i.stopPropagation(),u=n.proxy(r,this)(i,f),i.__currentTarget&&(u.prevent&=n.proxy(r,this)(i,n(i.__currentTarget)).prevent),u.prevent&&(i.preventDefault(),u.deltaY&&f.scrollTop(u.scrollTop+u.deltaY),e=u.top?"top":"bottom",this.options.animation&&setTimeout(t.CORE.animationHandler.bind(this,f,e),0),f.trigger(n.Event(e+t.NAMESPACE)))))},touchHandler:function(n){this.startClientY=n.originalEvent.touches[0].clientY},animationHandler:function(n,i){var r=this.options.animation[i],u=this.options.animation.top+" "+this.options.animation.bottom;n.off(t.ANIMATION_NAMESPACE).removeClass(u).addClass(r).one(t.CORE.animationEventName,function(){n.removeClass(r)})},keyboardHandler:function(i){var r=n(i.currentTarget),o=r.scrollTop(),f=u(i,r),e;return(i.__currentTarget&&(e=u(i,n(i.__currentTarget)),f.top&=e.top,f.bottom&=e.bottom),f.top)?(r.trigger(n.Event("top"+t.NAMESPACE)),this.options.animation&&setTimeout(t.CORE.animationHandler.bind(this,r,"top"),0),!1):f.bottom?(r.trigger(n.Event("bottom"+t.NAMESPACE)),this.options.animation&&setTimeout(t.CORE.animationHandler.bind(this,r,"bottom"),0),!1):void 0}};t.prototype.toggleStrict=function(){this.options.strict=!this.options.strict};t.prototype.enable=function(){this.enabled=!0};t.prototype.disable=function(){this.enabled=!1};t.prototype.destroy=function(){this.disable();this.$element.off(t.NAMESPACE);this.$element=null;this.options=null};f=n.fn.scrollLock;n.fn.scrollLock=function(i){return this.each(function(){var u=n(this),f=typeof i=="object"&&i,r=u.data(t.NAME);(r||"destroy"!==i)&&(r||u.data(t.NAME,r=new t(u,f)),typeof i=="string"&&r[i]())})};n.fn.scrollLock.defaults=t.DEFAULTS;n.fn.scrollLock.noConflict=function(){return n.fn.scrollLock=f,this}});
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