https://iff.org/wp-content/themes/IFFTheme2023-NewColors/scripts/swipe-content.js

1(function(){var SwipeContent=function(element){this.element=element;this.delta=[false,false];this.dragging=false;this.intervalId=false;initSwipeContent(this);};function initSwipeContent(content){content.element.addEventListener('mousedown',handleEvent.bind(content));content.element.addEventListener('touchstart',handleEvent.bind(content));};function initDragging(content){content.element.addEventListener('mousemove',handleEvent.bind(content));content.element.addEventListener('touchmove',handleEvent.bind(content));content.element.addEventListener('mouseup',handleEvent.bind(content));content.element.addEventListener('mouseleave',handleEvent.bind(content));content.element.addEventListener('touchend',handleEvent.bind(content));};function cancelDragging(content){if(content.intervalId){(!window.requestAnimationFrame)?clearInterval(content.intervalId):window.cancelAnimationFrame(content.intervalId);content.intervalId=false;}
2content.element.removeEventListener('mousemove',handleEvent.bind(content));content.element.removeEventListener('touchmove',handleEvent.bind(content));content.element.removeEventListener('mouseup',handleEvent.bind(content));content.element.removeEventListener('mouseleave',handleEvent.bind(content));content.element.removeEventListener('touchend',handleEvent.bind(content));};function handleEvent(event){switch(event.type){case 'mousedown':case 'touchstart':startDrag(this,event);break;case 'mousemove':case 'touchmove':drag(this,event);break;case 'mouseup':case 'mouseleave':case 'touchend':endDrag(this,event);break;}};function startDrag(content,event){content.dragging=true;initDragging(content);content.delta=[parseInt(unify(event).clientX),parseInt(unify(event).clientY)];emitSwipeEvents(content,'dragStart',content.delta);};function endDrag(content,event){cancelDragging(content);var dx=parseInt(unify(event).clientX),dy=parseInt(unify(event).clientY);if(content.delta&&(content.delta[0]||content.delta[0]===0)){var s=Math.sign(dx-content.delta[0]);if(Math.abs(dx-content.delta[0])>30){(s<0)?emitSwipeEvents(content,'swipeLeft',[dx,dy]):emitSwipeEvents(content,'swipeRight',[dx,dy]);}
3content.delta[0]=false;}
4if(content.delta&&(content.delta[1]||content.delta[1]===0)){var y=Math.sign(dy-content.delta[1]);if(Math.abs(dy-content.delta[1])>30){(y<0)?emitSwipeEvents(content,'swipeUp',[dx,dy]):emitSwipeEvents(content,'swipeDown',[dx,dy]);}
5content.delta[1]=false;}
6emitSwipeEvents(content,'dragEnd',[dx,dy]);content.dragging=false;};function drag(content,event){if(!content.dragging)return;(!window.requestAnimationFrame)?content.intervalId=setTimeout(function(){emitDrag.bind(content,event);},250):content.intervalId=window.requestAnimationFrame(emitDrag.bind(content,event));};function emitDrag(event){emitSwipeEvents(this,'dragging',[parseInt(unify(event).clientX),parseInt(unify(event).clientY)]);};function unify(event){return event.changedTouches?event.changedTouches[0]:event;};function emitSwipeEvents(content,eventName,detail){var event=new CustomEvent(eventName,{detail:{x:detail[0],y:detail[1]}});content.element.dispatchEvent(event);};window.SwipeContent=SwipeContent;var swipe=document.getElementsByClassName('js-swipe-content');if(swipe.length>0){for(var i=0;i<swipe.length;i++){(function(i){new SwipeContent(swipe[i]);})(i);}}}());