jellyfin-web/dashboard-ui/bower_components/emby-webcomponents/scroller/smoothscroller.js

define(["browser","layoutManager","dom","focusManager","ResizeObserver","scrollStyles"],function(browser,layoutManager,dom,focusManager,ResizeObserver){"use strict";function type(value){return null==value?String(value):"object"==typeof value||"function"==typeof value?Object.prototype.toString.call(value).match(/\s([a-z]+)/i)[1].toLowerCase()||"object":typeof value}function disableOneEvent(event){event.preventDefault(),event.stopPropagation(),this.removeEventListener(event.type,disableOneEvent)}function within(number,min,max){return number<min?min:number>max?max:number}var dragMouseEvents=["mousemove","mouseup"],dragTouchEvents=["touchmove","touchend"],wheelEvent=document.implementation.hasFeature("Event.wheel","3.0")?"wheel":"mousewheel",interactiveElements=["INPUT","SELECT","TEXTAREA"],abs=Math.abs,sqrt=Math.sqrt,pow=Math.pow,round=Math.round,max=Math.max,scrollerFactory=(Math.min,function(frame,options){function sibling(n,elem){for(var matched=[];n;n=n.nextSibling)1===n.nodeType&&n!==elem&&matched.push(n);return matched}function ensureSizeInfo(){requiresReflow&&(requiresReflow=!1,frameSize=o.horizontal?frame.offsetWidth:frame.offsetHeight,slideeSize=o.scrollWidth||Math.max(slideeElement[o.horizontal?"offsetWidth":"offsetHeight"],slideeElement[o.horizontal?"scrollWidth":"scrollHeight"]),self._pos.end=max(slideeSize-frameSize,0))}function load(isInit){if(requiresReflow=!0,!isInit){ensureSizeInfo();var pos=self._pos;self.slideTo(within(pos.dest,pos.start,pos.end))}}function initFrameResizeObserver(){var observerOptions={};self.frameResizeObserver=new ResizeObserver(onResize,observerOptions),self.frameResizeObserver.observe(frame)}function nativeScrollTo(container,pos,immediate){container.scroll?o.horizontal?container.scroll({left:pos,behavior:immediate?"instant":"smooth"}):container.scroll({top:pos,behavior:immediate?"instant":"smooth"}):!immediate&&container.scrollTo?o.horizontal?container.scrollTo(Math.round(pos),0):container.scrollTo(0,Math.round(pos)):o.horizontal?container.scrollLeft=Math.round(pos):container.scrollTop=Math.round(pos)}function setStyleProperty(elem,name,value,speed,resetTransition){var style=elem.style;(resetTransition||browser.edge)&&(style.transition="none",void elem.offsetWidth),style.transition="transform "+speed+"ms ease-out",style[name]=value}function dispatchScrollEventIfNeeded(){o.dispatchScrollEvent&&frame.dispatchEvent(new CustomEvent(self.getScrollEventName(),{bubbles:!0,cancelable:!1}))}function renderAnimateWithTransform(){var speed=o.speed;animation.immediate&&(speed=o.immediateSpeed||50),o.horizontal?setStyleProperty(slideeElement,"transform","translateX("+-round(animation.to)+"px)",speed):setStyleProperty(slideeElement,"transform","translateY("+-round(animation.to)+"px)",speed),self._pos.cur=animation.to,dispatchScrollEventIfNeeded()}function getBoundingClientRect(elem){return elem.getBoundingClientRect?elem.getBoundingClientRect():{top:0,left:0}}function dragInitSlidee(event){var isTouch="touchstart"===event.type;if(!(dragging.init||!isTouch&&isInteractive(event.target))&&(isTouch?o.touchDragging:o.mouseDragging&&event.which<2)){isTouch||event.preventDefault(),dragging.released=0,dragging.init=0,dragging.source=event.target,dragging.touch=isTouch;var pointer=isTouch?event.touches[0]:event;dragging.initX=pointer.pageX,dragging.initY=pointer.pageY,dragging.initPos=self._pos.cur,dragging.start=+new Date,dragging.time=0,dragging.path=0,dragging.delta=0,dragging.locked=0,dragging.pathToLock=isTouch?30:10,transform&&(isTouch?dragTouchEvents.forEach(function(eventName){dom.addEventListener(document,eventName,dragHandler,{passive:!0})}):dragMouseEvents.forEach(function(eventName){dom.addEventListener(document,eventName,dragHandler,{passive:!0})}))}}function dragHandler(event){dragging.released="mouseup"===event.type||"touchend"===event.type;var pointer=dragging.touch?event[dragging.released?"changedTouches":"touches"][0]:event;if(dragging.pathX=pointer.pageX-dragging.initX,dragging.pathY=pointer.pageY-dragging.initY,dragging.path=sqrt(pow(dragging.pathX,2)+pow(dragging.pathY,2)),dragging.delta=o.horizontal?dragging.pathX:dragging.pathY,dragging.released||!(dragging.path<1)){if(!dragging.init){if(dragging.path<o.dragThreshold)return dragging.released?dragEnd():void 0;if(!(o.horizontal?abs(dragging.pathX)>abs(dragging.pathY):abs(dragging.pathX)<abs(dragging.pathY)))return dragEnd();dragging.init=1}!dragging.locked&&dragging.path>dragging.pathToLock&&(dragging.locked=1,dragging.source.addEventListener("click",disableOneEvent)),dragging.released&&dragEnd(),self.slideTo(round(dragging.initPos-dragging.delta))}}function dragEnd(){dragging.released=!0,dragTouchEvents.forEach(function(eventName){dom.removeEventListener(document,eventName,dragHandler,{passive:!0})}),dragMouseEvents.forEach(function(eventName){dom.removeEventListener(document,eventName,dragHandler,{passive:!0})}),setTimeout(function(){dragging.source.removeEventListener("click",disableOneEvent)}),dragging.init=0}function isInteractive(element){for(;element;){if(interactiveElements.indexOf(element.tagName)!==-1)return!0;element=element.parentNode}return!1}function normalizeWheelDelta(event){return scrolling.curDelta=(o.horizontal?event.deltaY||event.deltaX:event.deltaY)||-event.wheelDelta,transform&&(scrolling.curDelta/=1===event.deltaMode?3:100),scrolling.curDelta}function scrollHandler(event){ensureSizeInfo();var pos=self._pos;if(o.scrollBy&&pos.start!==pos.end){var delta=normalizeWheelDelta(event);transform?(delta>0&&pos.dest<pos.end||delta<0&&pos.dest>pos.start,self.slideBy(o.scrollBy*delta)):(isSmoothScrollSupported&&(delta*=12),o.horizontal?nativeScrollElement.scrollLeft+=delta:nativeScrollElement.scrollTop+=delta)}}function onResize(entries){var entry=entries[0];if(entry){var newRect=entry.contentRect;newRect.width===contentRect.width&&newRect.height===contentRect.height||(contentRect=newRect,load(!1))}}function resetScroll(){o.horizontal?this.scrollLeft=0:this.scrollTop=0}function onFrameClick(e){if(1===e.which){var focusableParent=focusManager.focusableParent(e.target);focusableParent&&focusableParent!==document.activeElement&&focusableParent.focus()}}var o=Object.assign({},{slidee:null,horizontal:!1,mouseWheel:!0,scrollBy:0,dragSource:null,mouseDragging:1,touchDragging:1,dragThreshold:3,intervactive:null,speed:0},options),isSmoothScrollSupported="scrollBehavior"in document.documentElement.style,browserSupportsAnimation=!!browser.animate;isSmoothScrollSupported&&(browser.firefox||options.allowNativeSmoothScroll)?options.enableNativeScroll=!0:options.requireAnimation&&browserSupportsAnimation?options.enableNativeScroll=!1:layoutManager.tv&&browserSupportsAnimation||(options.enableNativeScroll=!0),browser.web0s&&(options.enableNativeScroll=!0);var self=this;self.options=o;var slideeElement=o.slidee?o.slidee:sibling(frame.firstChild)[0];self._pos={start:0,center:0,end:0,cur:0,dest:0};var transform=!options.enableNativeScroll,scrollSource=frame,dragSourceElement=o.dragSource?o.dragSource:frame,animation={},dragging={released:1},scrolling={last:0,delta:0,resetTime:200};self.initialized=0,self.slidee=slideeElement,self.options=o,self.dragging=dragging;var nativeScrollElement=frame,requiresReflow=!0,frameSize=0,slideeSize=0;self.reload=function(){load()},self.getScrollEventName=function(){return transform?"scrollanimate":"scroll"},self.getScrollSlider=function(){return slideeElement},self.getScrollFrame=function(){return frame},self.slideTo=function(newPos,immediate,fullItemPos){ensureSizeInfo();var pos=self._pos;if(newPos=within(newPos,pos.start,pos.end),!transform)return void nativeScrollTo(nativeScrollElement,newPos,immediate);animation.from=pos.cur,animation.to=newPos,animation.immediate=immediate||dragging.init||!o.speed;var now=(new Date).getTime();o.autoImmediate&&!animation.immediate&&now-(animation.lastAnimate||0)<=50&&(animation.immediate=!0),!animation.immediate&&o.skipSlideToWhenVisible&&fullItemPos&&fullItemPos.isVisible||newPos!==pos.dest&&(pos.dest=newPos,renderAnimateWithTransform(),animation.lastAnimate=now)},self.getPos=function(item){var scrollElement=transform?slideeElement:nativeScrollElement,slideeOffset=getBoundingClientRect(scrollElement),itemOffset=getBoundingClientRect(item),offset=(o.horizontal?slideeOffset.left:slideeOffset.top,o.horizontal?slideeOffset.right:slideeOffset.bottom,o.horizontal?itemOffset.left-slideeOffset.left:itemOffset.top-slideeOffset.top),size=o.horizontal?itemOffset.width:itemOffset.height;size||0===size||(size=item[o.horizontal?"offsetWidth":"offsetHeight"]);var centerOffset=o.centerOffset||0;transform||(centerOffset=0,offset+=o.horizontal?nativeScrollElement.scrollLeft:nativeScrollElement.scrollTop),ensureSizeInfo();var currentStart=self._pos.cur,currentEnd=currentStart+frameSize,isVisible=offset>=currentStart&&offset+size<=currentEnd;return{start:offset,center:offset+centerOffset-frameSize/2+size/2,end:offset-frameSize+size,size:size,isVisible:isVisible}},self.getCenterPosition=function(item){ensureSizeInfo();var pos=self.getPos(item);return within(pos.center,pos.start,pos.end)},self.destroy=function(){return self.frameResizeObserver&&(self.frameResizeObserver.disconnect(),self.frameResizeObserver=null),dom.removeEventListener(frame,"scroll",resetScroll,{passive:!0}),dom.removeEventListener(scrollSource,wheelEvent,scrollHandler,{passive:!0}),dom.removeEventListener(dragSourceElement,"touchstart",dragInitSlidee,{passive:!0}),dom.removeEventListener(frame,"click",onFrameClick,{passive:!0,capture:!0}),dom.removeEventListener(dragSourceElement,"mousedown",dragInitSlidee,{}),self.initialized=0,self};var contentRect={};self.getScrollPosition=function(){return transform?self._pos.cur:o.horizontal?nativeScrollElement.scrollLeft:nativeScrollElement.scrollTop},self.getScrollSize=function(){return transform?slideeSize:o.horizontal?nativeScrollElement.scrollWidth:nativeScrollElement.scrollHeight},self.init=function(){if(!self.initialized)return transform?(frame.style.overflow="hidden",slideeElement.style["will-change"]="transform",slideeElement.style.transition="transform "+o.speed+"ms ease-out",o.horizontal?slideeElement.classList.add("animatedScrollX"):slideeElement.classList.add("animatedScrollY")):o.horizontal?(layoutManager.desktop&&!o.hideScrollbar?nativeScrollElement.classList.add("smoothScrollX"):nativeScrollElement.classList.add("hiddenScrollX"),o.forceHideScrollbars&&nativeScrollElement.classList.add("hiddenScrollX-forced")):(layoutManager.desktop&&!o.hideScrollbar?nativeScrollElement.classList.add("smoothScrollY"):nativeScrollElement.classList.add("hiddenScrollY"),o.forceHideScrollbars&&nativeScrollElement.classList.add("hiddenScrollY-forced")),(transform||layoutManager.tv)&&dom.addEventListener(dragSourceElement,"mousedown",dragInitSlidee,{}),initFrameResizeObserver(),transform?(dom.addEventListener(dragSourceElement,"touchstart",dragInitSlidee,{passive:!0}),o.horizontal||dom.addEventListener(frame,"scroll",resetScroll,{passive:!0}),o.mouseWheel&&dom.addEventListener(scrollSource,wheelEvent,scrollHandler,{passive:!0})):o.horizontal&&o.mouseWheel&&dom.addEventListener(scrollSource,wheelEvent,scrollHandler,{passive:!0}),dom.addEventListener(frame,"click",onFrameClick,{passive:!0,capture:!0}),self.initialized=1,load(!0),self}});return scrollerFactory.prototype.slideBy=function(delta,immediate){delta&&this.slideTo(this._pos.dest+delta,immediate)},scrollerFactory.prototype.to=function(location,item,immediate){if("boolean"===type(item)&&(immediate=item,item=void 0),void 0===item)this.slideTo(this._pos[location],immediate);else{var itemPos=this.getPos(item);itemPos&&this.slideTo(itemPos[location],immediate,itemPos)}},scrollerFactory.prototype.toStart=function(item,immediate){this.to("start",item,immediate)},scrollerFactory.prototype.toEnd=function(item,immediate){this.to("end",item,immediate)},scrollerFactory.prototype.toCenter=function(item,immediate){this.to("center",item,immediate)},scrollerFactory.create=function(frame,options){var instance=new scrollerFactory(frame,options);return Promise.resolve(instance)},scrollerFactory});