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2 lines
5.8 KiB
2 lines
5.8 KiB
!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):(e="undefined"!=typeof globalThis?globalThis:e||self).Wheel=t()}(this,function(){"use strict";var n="undefined"!=typeof window,o=n&&navigator.userAgent.toLowerCase(),s=(o&&/wechatdevtools/.test(o),o&&o.indexOf("android"),function(){if("string"!=typeof o)return;var e=/os (\d\d?_\d(_\d)?)/.exec(o);if(!e)return;var t=e[1].split("_").map(function(e){return parseInt(e,10)});13<=t[0]&&t[1]}(),n&&document.createElement("div").style),t=function(){if(!n)return!1;for(var e=0,t=[{key:"standard",value:"transform"},{key:"webkit",value:"webkitTransform"},{key:"Moz",value:"MozTransform"},{key:"O",value:"OTransform"},{key:"ms",value:"msTransform"}];e<t.length;e++){var o=t[e];if(void 0!==s[o.value])return o.key}return!1}();function e(e){return!1===t?e:"standard"===t?"transitionEnd"===e?"transitionend":e:t+e.charAt(0).toUpperCase()+e.substr(1)}t&&"standard"!==t&&t.toLowerCase();var i=e("transform"),r=(e("transition"),n&&e("perspective")in s,i),l=e("transitionTimingFunction"),a=e("transitionDuration");e("transitionDelay"),e("transformOrigin"),e("transitionEnd"),e("transitionProperty");function h(e,t){return new RegExp("(^|\\s)"+t+"(\\s|$)").test(e.className)}var c={style:"cubic-bezier(0.23, 1, 0.32, 1)",fn:function(e){return 1+--e*e*e*e*e}},d=[{key:"wheelTo",name:"wheelTo"},{key:"getSelectedIndex",name:"getSelectedIndex"}].map(function(e){return{key:e.key,sourceKey:"plugins.wheel."+e.name}}),u=4;function f(e){this.scroll=e,this.init()}return f.prototype.init=function(){this.handleBScroll(),this.handleOptions(),this.handleHooks(),this.refreshBoundary(),this.handleSelectedIndex()},f.prototype.handleBScroll=function(){this.scroll.proxy(d)},f.prototype.handleOptions=function(){var e=!0===this.scroll.options.wheel?{}:this.scroll.options.wheel;this.options=function(e,t){for(var o in t)e[o]=t[o];return e}({wheelWrapperClass:"wheel-scroll",wheelItemClass:"wheel-item",rotate:25,adjustTime:400,selectedIndex:0,wheelDisabledItemClass:"wheel-disabled-item"},e)},f.prototype.handleHooks=function(){var o=this,e=this.scroll.scroller,t=e.actionsHandler,n=e.scrollBehaviorX,s=e.scrollBehaviorY,i=e.animater,r=e.content;this.scroll.hooks.on(this.scroll.hooks.eventTypes.refresh,function(e){e!==r&&(r=e,o.handleSelectedIndex()),o.wheelTo(o.selectedIndex,0)}),this.scroll.hooks.on(this.scroll.hooks.eventTypes.beforeInitialScrollTo,function(e){e.x=0,e.y=-(o.selectedIndex*o.itemHeight)}),e.hooks.on(e.hooks.eventTypes.checkClick,function(){var e=Array.prototype.slice.call(o.items,0).indexOf(o.target);return-1===e||o.wheelToAfterClick(e,o.options.adjustTime,c),!0}),e.hooks.on(e.hooks.eventTypes.scrollTo,function(e){e.y=o.findNearestValidWheel(e.y).y}),e.hooks.on(e.hooks.eventTypes.scrollToElement,function(e,t){return!h(e,o.options.wheelItemClass)||void(t.top=o.findNearestValidWheel(t.top).y)}),t.hooks.on(t.hooks.eventTypes.beforeStart,function(e){o.target=e.target}),n.hooks.on(n.hooks.eventTypes.computeBoundary,function(e){e.maxScrollPos=0,e.minScrollPos=0}),s.hooks.on(s.hooks.eventTypes.computeBoundary,function(e){o.items=o.scroll.scroller.content.children,o.checkWheelAllDisabled(),o.itemHeight=0<o.items.length?s.contentSize/o.items.length:0,e.maxScrollPos=-o.itemHeight*(o.items.length-1),e.minScrollPos=0}),s.hooks.on(s.hooks.eventTypes.momentum,function(e,t){e.rate=u,e.destination=o.findNearestValidWheel(e.destination).y;t<1e3&&(e.duration=Math.max(800,t/1e3*o.scroll.options.swipeTime))}),s.hooks.on(s.hooks.eventTypes.end,function(e){var t=o.findNearestValidWheel(s.currentPos);e.destination=t.y,e.duration=o.options.adjustTime,o.selectedIndex=t.index}),i.hooks.on(i.hooks.eventTypes.time,function(e){o.transitionDuration(e)}),i.hooks.on(i.hooks.eventTypes.timeFunction,function(e){o.timeFunction(e)}),i.hooks.on(i.hooks.eventTypes.beforeForceStop,function(e){var t=e.y;return o.target=o.items[o.findNearestValidWheel(t).index],!0}),i.hooks.on(i.hooks.eventTypes.callStop,function(){var e,t=Array.prototype.slice.call(o.items,0).indexOf(o.target);0<t&&(e=-(t*o.itemHeight),i.translate({x:0,y:e}))}),i.translater.hooks.on(i.translater.hooks.eventTypes.translate,function(e){o.rotateX(e.y),o.selectedIndex=o.findNearestValidWheel(e.y).index})},f.prototype.refreshBoundary=function(){var e=this.scroll.scroller,t=e.scrollBehaviorX,o=e.scrollBehaviorY,n=e.content;t.refresh(n),o.refresh(n)},f.prototype.handleSelectedIndex=function(){this.selectedIndex=this.options.selectedIndex},f.prototype.getSelectedIndex=function(){return this.selectedIndex},f.prototype.wheelTo=function(e,t,o){void 0===e&&(e=0),void 0===t&&(t=0);var n=-e*this.itemHeight,s=Math.round(this.scroll.y);return this.scroll.scrollTo(0,n,t,o),n===s},f.prototype.wheelToAfterClick=function(e,t,o){var n;void 0===e&&(e=0),void 0===t&&(t=0),this.wheelTo(e,t,o)&&(n=this.scroll.scroller.hooks).trigger(n.eventTypes.scrollEnd)},f.prototype.transitionDuration=function(e){for(var t=0;t<this.items.length;t++)this.items[t].style[a]=e+"ms"},f.prototype.timeFunction=function(e){for(var t=0;t<this.items.length;t++)this.items[t].style[l]=e},f.prototype.rotateX=function(e){for(var t=this.options.rotate,o=void 0===t?25:t,n=0;n<this.items.length;n++){var s=(o*(e/this.itemHeight+n)).toFixed(3);this.items[n].style[r]="rotateX("+s+"deg)"}},f.prototype.findNearestValidWheel=function(e){e=0<e?0:e<this.scroll.maxScrollY?this.scroll.maxScrollY:e;for(var t=Math.abs(Math.round(-e/this.itemHeight)),o=t,n=this.items,s=this.options.wheelDisabledItemClass;0<=t&&h(n[t],s);)t--;if(t<0)for(t=o;t<=n.length-1&&h(n[t],s);)t++;return t===n.length&&(t=o),{index:this.wheelItemsAllDisabled?-1:t,y:-t*this.itemHeight}},f.prototype.checkWheelAllDisabled=function(){var e=this.options.wheelDisabledItemClass,t=this.items;this.wheelItemsAllDisabled=!0;for(var o=0;o<t.length;o++)if(!h(t[o],e)){this.wheelItemsAllDisabled=!1;break}},f.pluginName="wheel",f});
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