(() => { (function() { var defaultOptions = { frameRate: 150, animationTime: 400, stepSize: 100, pulseAlgorithm: true, pulseScale: 4, pulseNormalize: 1, accelerationDelta: 50, accelerationMax: 3, keyboardSupport: true, arrowScroll: 50, fixedBackground: true, excluded: '' }; var options = defaultOptions; var isExcluded = false; var isFrame = false; var direction = { x: 0, y: 0 }; var initDone = false; var root = document.documentElement; var activeElement; var observer; var refreshSize; var deltaBuffer = []; var deltaBufferTimer; var isMac = /^Mac/.test(navigator.platform); var key = { left: 37, up: 38, right: 39, down: 40, spacebar: 32, pageup: 33, pagedown: 34, end: 35, home: 36 }; var arrowKeys = { 37: 1, 38: 1, 39: 1, 40: 1 }; function initTest() { if (options.keyboardSupport) { addEvent('keydown', keydown); } } function init() { if (initDone || !document.body) return; initDone = true; var body = document.body; var html = document.documentElement; var windowHeight = window.innerHeight; var scrollHeight = body.scrollHeight; root = (document.compatMode.indexOf('CSS') >= 0) ? html : body; activeElement = body; initTest(); if (top != self) { isFrame = true; } else if (scrollHeight > windowHeight && (body.offsetHeight > 0; var y = (item.y * position - item.lastY) >> 0; scrollX += x; scrollY += y; item.lastX += x; item.lastY += y; if (finished) { que.splice(i, 1); i--; } } if (isWindowScroll) { window.scrollBy(scrollX, scrollY); } else { if (scrollX) elem.scrollLeft += scrollX; if (scrollY) elem.scrollTop += scrollY; } if (!left && !top) { que = []; } if (que.length) { requestFrame(step, elem, (1000 / options.frameRate + 1)); } else { pending = false; if (elem.$scrollBehavior != null) { elem.style.scrollBehavior = elem.$scrollBehavior; elem.$scrollBehavior = null; } } }; requestFrame(step, elem, 0); pending = true; } function wheel(event) { if (!initDone) { init(); } var target = event.target; if (event.defaultPrevented || event.ctrlKey) { return true; } if (isNodeName(activeElement, 'embed') || (isNodeName(target, 'embed') && /.pdf/i.test(target.src)) || isNodeName(activeElement, 'object') || target.shadowRoot) { return true; } var deltaX = -event.wheelDeltaX || event.deltaX || 0; var deltaY = -event.wheelDeltaY || event.deltaY || 0; if (isMac) { if (event.wheelDeltaX && isDivisible(event.wheelDeltaX, 120)) { deltaX = -120 * (event.wheelDeltaX / Math.abs(event.wheelDeltaX)); } if (event.wheelDeltaY && isDivisible(event.wheelDeltaY, 120)) { deltaY = -120 * (event.wheelDeltaY / Math.abs(event.wheelDeltaY)); } } if (!deltaX && !deltaY) { deltaY = -event.wheelDelta || 0; } if (event.deltaMode === 1) { deltaX *= 40; deltaY *= 40; } var overflowing = overflowingAncestor(target); if (!overflowing) { if (isFrame && isChrome) { Object.defineProperty(event, "target", { value: window.frameElement }); return parent.wheel(event); } return true; } if (Math.abs(deltaX) > 1.2) { deltaX *= options.stepSize / 120; } if (Math.abs(deltaY) > 1.2) { deltaY *= options.stepSize / 120; } scrollArray(overflowing, deltaX, deltaY); event.preventDefault(); scheduleClearCache(); } function keydown(event) { var target = event.target; var modifier = event.ctrlKey || event.altKey || event.metaKey || (event.shiftKey && event.keyCode !== key.spacebar); if (!document.body.contains(activeElement)) { activeElement = document.activeElement; } var inputNodeNames = /^(textarea|select|embed|object)$/i; var buttonTypes = /^(button|submit|radio|checkbox|file|color|image)$/i; if (event.defaultPrevented || inputNodeNames.test(target.nodeName) || isNodeName(target, 'input') && !buttonTypes.test(target.type) || isNodeName(activeElement, 'video') || isInsideYoutubeVideo(event) || target.isContentEditable || modifier) { return true; } if ((isNodeName(target, 'button') || isNodeName(target, 'input') && buttonTypes.test(target.type)) && event.keyCode === key.spacebar) { return true; } if (isNodeName(target, 'input') && target.type == 'radio' && arrowKeys[event.keyCode]) { return true; } var shift, x = 0, y = 0; var overflowing = overflowingAncestor(activeElement); if (!overflowing) { return (isFrame && isChrome) ? parent.keydown(event) : true; } var clientHeight = overflowing.clientHeight; if (overflowing == document.body) { clientHeight = window.innerHeight; } switch (event.keyCode) { case key.up: y = -options.arrowScroll; break; case key.down: y = options.arrowScroll; break; case key.spacebar: shift = event.shiftKey ? 1 : -1; y = -shift * clientHeight * 0.9; break; case key.pageup: y = -clientHeight * 0.9; break; case key.pagedown: y = clientHeight * 0.9; break; case key.home: if (overflowing == document.body && document.scrollingElement) overflowing = document.scrollingElement; y = -overflowing.scrollTop; break; case key.end: var scroll = overflowing.scrollHeight - overflowing.scrollTop; var scrollRemaining = scroll - clientHeight; y = (scrollRemaining > 0) ? scrollRemaining + 10 : 0; break; case key.left: x = -options.arrowScroll; break; case key.right: x = options.arrowScroll; break; default: return true; } scrollArray(overflowing, x, y); event.preventDefault(); scheduleClearCache(); } function mousedown(event) { activeElement = event.target; } var uniqueID = (function() { var i = 0; return function(el) { return el.uniqueID || (el.uniqueID = i++); }; })(); var cacheX = {}; var cacheY = {}; var clearCacheTimer; var smoothBehaviorForElement = {}; function scheduleClearCache() { clearTimeout(clearCacheTimer); clearCacheTimer = setInterval(function() { cacheX = cacheY = smoothBehaviorForElement = {}; }, 1 * 1000); } function setCache(elems, overflowing, x) { var cache = x ? cacheX : cacheY; for (var i = elems.length; i--;) cache[uniqueID(elems[i])] = overflowing; return overflowing; } function getCache(el, x) { return (x ? cacheX : cacheY)[uniqueID(el)]; } function overflowingAncestor(el) { var elems = []; var body = document.body; var rootScrollHeight = root.scrollHeight; do { var cached = getCache(el, false); if (cached) { return setCache(elems, cached); } elems.push(el); if (rootScrollHeight === el.scrollHeight) { var topOverflowsNotHidden = overflowNotHidden(root) && overflowNotHidden(body); var isOverflowCSS = topOverflowsNotHidden || overflowAutoOrScroll(root); if (isFrame && isContentOverflowing(root) || !isFrame && isOverflowCSS) { return setCache(elems, getScrollRoot()); } } else if (isContentOverflowing(el) && overflowAutoOrScroll(el)) { return setCache(elems, el); } } while ((el = el.parentElement)); } function isContentOverflowing(el) { return (el.clientHeight + 10 < el.scrollHeight); } function overflowNotHidden(el) { var overflow = getComputedStyle(el, '').getPropertyValue('overflow-y'); return (overflow !== 'hidden'); } function overflowAutoOrScroll(el) { var overflow = getComputedStyle(el, '').getPropertyValue('overflow-y'); return (overflow === 'scroll' || overflow === 'auto'); } function isScrollBehaviorSmooth(el) { var id = uniqueID(el); if (smoothBehaviorForElement[id] == null) { var scrollBehavior = getComputedStyle(el, '')['scroll-behavior']; smoothBehaviorForElement[id] = ('smooth' == scrollBehavior); } return smoothBehaviorForElement[id]; } function addEvent(type, fn, arg) { window.addEventListener(type, fn, arg || false); } function removeEvent(type, fn, arg) { window.removeEventListener(type, fn, arg || false); } function isNodeName(el, tag) { return el && (el.nodeName || '').toLowerCase() === tag.toLowerCase(); } function directionCheck(x, y) { x = (x > 0) ? 1 : -1; y = (y > 0) ? 1 : -1; if (direction.x !== x || direction.y !== y) { direction.x = x; direction.y = y; que = []; lastScroll = 0; } } if (window.localStorage && localStorage.SS_deltaBuffer) { try { deltaBuffer = localStorage.SS_deltaBuffer.split(','); } catch (e) {} } function isTouchpad(deltaY) { if (!deltaY) return; if (!deltaBuffer.length) { deltaBuffer = [deltaY, deltaY, deltaY]; } deltaY = Math.abs(deltaY); deltaBuffer.push(deltaY); deltaBuffer.shift(); clearTimeout(deltaBufferTimer); deltaBufferTimer = setTimeout(function() { try { localStorage.SS_deltaBuffer = deltaBuffer.join(','); } catch (e) {} }, 1000); var dpiScaledWheelDelta = deltaY > 120 && allDeltasDivisableBy(deltaY); var tp = !allDeltasDivisableBy(120) && !allDeltasDivisableBy(100) && !dpiScaledWheelDelta; if (deltaY < 50) return true; return tp; } function isDivisible(n, divisor) { return (Math.floor(n / divisor) == n / divisor); } function allDeltasDivisableBy(divisor) { return (isDivisible(deltaBuffer[0], divisor) && isDivisible(deltaBuffer[1], divisor) && isDivisible(deltaBuffer[2], divisor)); } function isInsideYoutubeVideo(event) { var elem = event.target; var isControl = false; if (document.URL.indexOf('www.youtube.com/watch') != -1) { do { isControl = (elem.classList && elem.classList.contains('html5-video-controls')); if (isControl) break; } while ((elem = elem.parentNode)); } return isControl; } var requestFrame = (function() { return (window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || function(callback, element, delay) { window.setTimeout(callback, delay || (1000 / 60)); }); })(); var MutationObserver = (window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver); var getScrollRoot = (function() { var SCROLL_ROOT = document.scrollingElement; return function() { if (!SCROLL_ROOT) { var dummy = document.createElement('div'); dummy.style.cssText = 'height:10000px;width:1px;'; document.body.appendChild(dummy); var bodyScrollTop = document.body.scrollTop; var docElScrollTop = document.documentElement.scrollTop; window.scrollBy(0, 3); if (document.body.scrollTop != bodyScrollTop)(SCROLL_ROOT = document.body); else(SCROLL_ROOT = document.documentElement); window.scrollBy(0, -3); document.body.removeChild(dummy); } return SCROLL_ROOT; }; })(); function pulse_(x) { var val, start, expx; x = x * options.pulseScale; if (x < 1) { val = x - (1 - Math.exp(-x)); } else { start = Math.exp(-1); x -= 1; expx = 1 - Math.exp(-x); val = start + (expx * (1 - start)); } return val * options.pulseNormalize; } function pulse(x) { if (x >= 1) return 1; if (x