paesaggistica/liferay-plugins-sdk-6.2/portlets/portos-calendar-appointments-portlet/docroot/js/perfect-scrollbar.js

/*!
 * perfect-scrollbar v1.3.0
 * (c) 2017 Hyunje Jun
 * @license MIT
 */
(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
        typeof define === 'function' && define.amd ? define(factory) :
            (global.PerfectScrollbar = factory());
}(this, (function () { 'use strict';

    function get(element) {
        return getComputedStyle(element);
    }

    function set(element, obj) {
        for (var key in obj) {
            var val = obj[key];
            if (typeof val === 'number') {
                val = val + "px";
            }
            element.style[key] = val;
        }
        return element;
    }

    function div(className) {
        var div = document.createElement('div');
        div.className = className;
        return div;
    }

    var elMatches =
        typeof Element !== 'undefined' &&
        (Element.prototype.matches ||
            Element.prototype.webkitMatchesSelector ||
            Element.prototype.msMatchesSelector);

    function matches(element, query) {
        if (!elMatches) {
            throw new Error('No element matching method supported');
        }

        return elMatches.call(element, query);
    }

    function remove(element) {
        if (element.remove) {
            element.remove();
        } else {
            if (element.parentNode) {
                element.parentNode.removeChild(element);
            }
        }
    }

    function queryChildren(element, selector) {
        return Array.prototype.filter.call(element.children, function (child) { return matches(child, selector); }
        );
    }

    var cls = {
        main: 'ps',
        element: {
            thumb: function (x) { return ("ps__thumb-" + x); },
            rail: function (x) { return ("ps__rail-" + x); },
            consuming: 'ps__child--consume',
        },
        state: {
            focus: 'ps--focus',
            active: function (x) { return ("ps--active-" + x); },
            scrolling: function (x) { return ("ps--scrolling-" + x); },
        },
    };

    /*
     * Helper methods
     */
    var scrollingClassTimeout = { x: null, y: null };

    function addScrollingClass(i, x) {
        var classList = i.element.classList;
        var className = cls.state.scrolling(x);

        if (classList.contains(className)) {
            clearTimeout(scrollingClassTimeout[x]);
        } else {
            classList.add(className);
        }
    }

    function removeScrollingClass(i, x) {
        scrollingClassTimeout[x] = setTimeout(
            function () { return i.isAlive && i.element.classList.remove(cls.state.scrolling(x)); },
            i.settings.scrollingThreshold
        );
    }

    function setScrollingClassInstantly(i, x) {
        addScrollingClass(i, x);
        removeScrollingClass(i, x);
    }

    var EventElement = function EventElement(element) {
        this.element = element;
        this.handlers = {};
    };

    var prototypeAccessors = { isEmpty: { configurable: true } };

    EventElement.prototype.bind = function bind (eventName, handler) {
        if (typeof this.handlers[eventName] === 'undefined') {
            this.handlers[eventName] = [];
        }
        this.handlers[eventName].push(handler);
        this.element.addEventListener(eventName, handler, false);
    };

    EventElement.prototype.unbind = function unbind (eventName, target) {
        var this$1 = this;

        this.handlers[eventName] = this.handlers[eventName].filter(function (handler) {
            if (target && handler !== target) {
                return true;
            }
            this$1.element.removeEventListener(eventName, handler, false);
            return false;
        });
    };

    EventElement.prototype.unbindAll = function unbindAll () {
        var this$1 = this;

        for (var name in this$1.handlers) {
            this$1.unbind(name);
        }
    };

    prototypeAccessors.isEmpty.get = function () {
        var this$1 = this;

        return Object.keys(this.handlers).every(
            function (key) { return this$1.handlers[key].length === 0; }
        );
    };

    Object.defineProperties( EventElement.prototype, prototypeAccessors );

    var EventManager = function EventManager() {
        this.eventElements = [];
    };

    EventManager.prototype.eventElement = function eventElement (element) {
        var ee = this.eventElements.filter(function (ee) { return ee.element === element; })[0];
        if (!ee) {
            ee = new EventElement(element);
            this.eventElements.push(ee);
        }
        return ee;
    };

    EventManager.prototype.bind = function bind (element, eventName, handler) {
        this.eventElement(element).bind(eventName, handler);
    };

    EventManager.prototype.unbind = function unbind (element, eventName, handler) {
        var ee = this.eventElement(element);
        ee.unbind(eventName, handler);

        if (ee.isEmpty) {
            // remove
            this.eventElements.splice(this.eventElements.indexOf(ee), 1);
        }
    };

    EventManager.prototype.unbindAll = function unbindAll () {
        this.eventElements.forEach(function (e) { return e.unbindAll(); });
        this.eventElements = [];
    };

    EventManager.prototype.once = function once (element, eventName, handler) {
        var ee = this.eventElement(element);
        var onceHandler = function (evt) {
            ee.unbind(eventName, onceHandler);
            handler(evt);
        };
        ee.bind(eventName, onceHandler);
    };

    function createEvent(name) {
        if (typeof window.CustomEvent === 'function') {
            return new CustomEvent(name);
        } else {
            var evt = document.createEvent('CustomEvent');
            evt.initCustomEvent(name, false, false, undefined);
            return evt;
        }
    }

    var processScrollDiff = function(
        i,
        axis,
        diff,
        useScrollingClass,
        forceFireReachEvent
    ) {
        if ( useScrollingClass === void 0 ) useScrollingClass = true;
        if ( forceFireReachEvent === void 0 ) forceFireReachEvent = false;

        var fields;
        if (axis === 'top') {
            fields = [
                'contentHeight',
                'containerHeight',
                'scrollTop',
                'y',
                'up',
                'down' ];
        } else if (axis === 'left') {
            fields = [
                'contentWidth',
                'containerWidth',
                'scrollLeft',
                'x',
                'left',
                'right' ];
        } else {
            throw new Error('A proper axis should be provided');
        }

        processScrollDiff$1(i, diff, fields, useScrollingClass, forceFireReachEvent);
    };

    function processScrollDiff$1(
        i,
        diff,
        ref,
        useScrollingClass,
        forceFireReachEvent
    ) {
        var contentHeight = ref[0];
        var containerHeight = ref[1];
        var scrollTop = ref[2];
        var y = ref[3];
        var up = ref[4];
        var down = ref[5];
        if ( useScrollingClass === void 0 ) useScrollingClass = true;
        if ( forceFireReachEvent === void 0 ) forceFireReachEvent = false;

        var element = i.element;

        // reset reach
        i.reach[y] = null;

        // 1 for subpixel rounding
        if (element[scrollTop] < 1) {
            i.reach[y] = 'start';
        }

        // 1 for subpixel rounding
        if (element[scrollTop] > i[contentHeight] - i[containerHeight] - 1) {
            i.reach[y] = 'end';
        }

        if (diff) {
            element.dispatchEvent(createEvent(("ps-scroll-" + y)));

            if (diff < 0) {
                element.dispatchEvent(createEvent(("ps-scroll-" + up)));
            } else if (diff > 0) {
                element.dispatchEvent(createEvent(("ps-scroll-" + down)));
            }

            if (useScrollingClass) {
                setScrollingClassInstantly(i, y);
            }
        }

        if (i.reach[y] && (diff || forceFireReachEvent)) {
            element.dispatchEvent(createEvent(("ps-" + y + "-reach-" + (i.reach[y]))));
        }
    }

    function toInt(x) {
        return parseInt(x, 10) || 0;
    }

    function isEditable(el) {
        return (
            matches(el, 'input,[contenteditable]') ||
            matches(el, 'select,[contenteditable]') ||
            matches(el, 'textarea,[contenteditable]') ||
            matches(el, 'button,[contenteditable]')
        );
    }

    function outerWidth(element) {
        var styles = get(element);
        return (
            toInt(styles.width) +
            toInt(styles.paddingLeft) +
            toInt(styles.paddingRight) +
            toInt(styles.borderLeftWidth) +
            toInt(styles.borderRightWidth)
        );
    }

    var env = {
        isWebKit:
        typeof document !== 'undefined' &&
        'WebkitAppearance' in document.documentElement.style,
        supportsTouch:
        typeof window !== 'undefined' &&
        ('ontouchstart' in window ||
            (window.DocumentTouch && document instanceof window.DocumentTouch)),
        supportsIePointer:
        typeof navigator !== 'undefined' && navigator.msMaxTouchPoints,
        isChrome:
        typeof navigator !== 'undefined' &&
        /Chrome/i.test(navigator && navigator.userAgent),
    };

    var updateGeometry = function(i) {
        var element = i.element;

        i.containerWidth = element.clientWidth;
        i.containerHeight = element.clientHeight;
        i.contentWidth = element.scrollWidth;
        i.contentHeight = element.scrollHeight;

        if (!element.contains(i.scrollbarXRail)) {
            // clean up and append
            queryChildren(element, cls.element.rail('x')).forEach(function (el) { return remove(el); }
            );
            element.appendChild(i.scrollbarXRail);
        }
        if (!element.contains(i.scrollbarYRail)) {
            // clean up and append
            queryChildren(element, cls.element.rail('y')).forEach(function (el) { return remove(el); }
            );
            element.appendChild(i.scrollbarYRail);
        }

        if (
            !i.settings.suppressScrollX &&
            i.containerWidth + i.settings.scrollXMarginOffset < i.contentWidth
        ) {
            i.scrollbarXActive = true;
            i.railXWidth = i.containerWidth - i.railXMarginWidth;
            i.railXRatio = i.containerWidth / i.railXWidth;
            i.scrollbarXWidth = getThumbSize(
                i,
                toInt(i.railXWidth * i.containerWidth / i.contentWidth)
            );
            i.scrollbarXLeft = toInt(
                (i.negativeScrollAdjustment + element.scrollLeft) *
                (i.railXWidth - i.scrollbarXWidth) /
                (i.contentWidth - i.containerWidth)
            );
        } else {
            i.scrollbarXActive = false;
        }

        if (
            !i.settings.suppressScrollY &&
            i.containerHeight + i.settings.scrollYMarginOffset < i.contentHeight
        ) {
            i.scrollbarYActive = true;
            i.railYHeight = i.containerHeight - i.railYMarginHeight;
            i.railYRatio = i.containerHeight / i.railYHeight;
            i.scrollbarYHeight = getThumbSize(
                i,
                toInt(i.railYHeight * i.containerHeight / i.contentHeight)
            );
            i.scrollbarYTop = toInt(
                element.scrollTop *
                (i.railYHeight - i.scrollbarYHeight) /
                (i.contentHeight - i.containerHeight)
            );
        } else {
            i.scrollbarYActive = false;
        }

        if (i.scrollbarXLeft >= i.railXWidth - i.scrollbarXWidth) {
            i.scrollbarXLeft = i.railXWidth - i.scrollbarXWidth;
        }
        if (i.scrollbarYTop >= i.railYHeight - i.scrollbarYHeight) {
            i.scrollbarYTop = i.railYHeight - i.scrollbarYHeight;
        }

        updateCss(element, i);

        if (i.scrollbarXActive) {
            element.classList.add(cls.state.active('x'));
        } else {
            element.classList.remove(cls.state.active('x'));
            i.scrollbarXWidth = 0;
            i.scrollbarXLeft = 0;
            element.scrollLeft = 0;
        }
        if (i.scrollbarYActive) {
            element.classList.add(cls.state.active('y'));
        } else {
            element.classList.remove(cls.state.active('y'));
            i.scrollbarYHeight = 0;
            i.scrollbarYTop = 0;
            element.scrollTop = 0;
        }
    };

    function getThumbSize(i, thumbSize) {
        if (i.settings.minScrollbarLength) {
            thumbSize = Math.max(thumbSize, i.settings.minScrollbarLength);
        }
        if (i.settings.maxScrollbarLength) {
            thumbSize = Math.min(thumbSize, i.settings.maxScrollbarLength);
        }
        return thumbSize;
    }

    function updateCss(element, i) {
        var xRailOffset = { width: i.railXWidth };
        if (i.isRtl) {
            xRailOffset.left =
                i.negativeScrollAdjustment +
                element.scrollLeft +
                i.containerWidth -
                i.contentWidth;
        } else {
            xRailOffset.left = element.scrollLeft;
        }
        if (i.isScrollbarXUsingBottom) {
            xRailOffset.bottom = i.scrollbarXBottom - element.scrollTop;
        } else {
            xRailOffset.top = i.scrollbarXTop + element.scrollTop;
        }
        set(i.scrollbarXRail, xRailOffset);

        var yRailOffset = { top: element.scrollTop, height: i.railYHeight };
        if (i.isScrollbarYUsingRight) {
            if (i.isRtl) {
                yRailOffset.right =
                    i.contentWidth -
                    (i.negativeScrollAdjustment + element.scrollLeft) -
                    i.scrollbarYRight -
                    i.scrollbarYOuterWidth;
            } else {
                yRailOffset.right = i.scrollbarYRight - element.scrollLeft;
            }
        } else {
            if (i.isRtl) {
                yRailOffset.left =
                    i.negativeScrollAdjustment +
                    element.scrollLeft +
                    i.containerWidth * 2 -
                    i.contentWidth -
                    i.scrollbarYLeft -
                    i.scrollbarYOuterWidth;
            } else {
                yRailOffset.left = i.scrollbarYLeft + element.scrollLeft;
            }
        }
        set(i.scrollbarYRail, yRailOffset);

        set(i.scrollbarX, {
            left: i.scrollbarXLeft,
            width: i.scrollbarXWidth - i.railBorderXWidth,
        });
        set(i.scrollbarY, {
            top: i.scrollbarYTop,
            height: i.scrollbarYHeight - i.railBorderYWidth,
        });
    }

    var clickRail = function(i) {
        i.event.bind(i.scrollbarY, 'mousedown', function (e) { return e.stopPropagation(); });
        i.event.bind(i.scrollbarYRail, 'mousedown', function (e) {
            var positionTop =
                e.pageY -
                window.pageYOffset -
                i.scrollbarYRail.getBoundingClientRect().top;
            var direction = positionTop > i.scrollbarYTop ? 1 : -1;

            i.element.scrollTop += direction * i.containerHeight;
            updateGeometry(i);

            e.stopPropagation();
        });

        i.event.bind(i.scrollbarX, 'mousedown', function (e) { return e.stopPropagation(); });
        i.event.bind(i.scrollbarXRail, 'mousedown', function (e) {
            var positionLeft =
                e.pageX -
                window.pageXOffset -
                i.scrollbarXRail.getBoundingClientRect().left;
            var direction = positionLeft > i.scrollbarXLeft ? 1 : -1;

            i.element.scrollLeft += direction * i.containerWidth;
            updateGeometry(i);

            e.stopPropagation();
        });
    };

    var dragThumb = function(i) {
        bindMouseScrollHandler(i, [
            'containerWidth',
            'contentWidth',
            'pageX',
            'railXWidth',
            'scrollbarX',
            'scrollbarXWidth',
            'scrollLeft',
            'x' ]);
        bindMouseScrollHandler(i, [
            'containerHeight',
            'contentHeight',
            'pageY',
            'railYHeight',
            'scrollbarY',
            'scrollbarYHeight',
            'scrollTop',
            'y' ]);
    };

    function bindMouseScrollHandler(
        i,
        ref
    ) {
        var containerHeight = ref[0];
        var contentHeight = ref[1];
        var pageY = ref[2];
        var railYHeight = ref[3];
        var scrollbarY = ref[4];
        var scrollbarYHeight = ref[5];
        var scrollTop = ref[6];
        var y = ref[7];

        var element = i.element;

        var startingScrollTop = null;
        var startingMousePageY = null;
        var scrollBy = null;

        function mouseMoveHandler(e) {
            element[scrollTop] =
                startingScrollTop + scrollBy * (e[pageY] - startingMousePageY);
            addScrollingClass(i, y);
            updateGeometry(i);

            e.stopPropagation();
            e.preventDefault();
        }

        function mouseUpHandler() {
            removeScrollingClass(i, y);
            i.event.unbind(i.ownerDocument, 'mousemove', mouseMoveHandler);
        }

        i.event.bind(i[scrollbarY], 'mousedown', function (e) {
            startingScrollTop = element[scrollTop];
            startingMousePageY = e[pageY];
            scrollBy =
                (i[contentHeight] - i[containerHeight]) /
                (i[railYHeight] - i[scrollbarYHeight]);

            i.event.bind(i.ownerDocument, 'mousemove', mouseMoveHandler);
            i.event.once(i.ownerDocument, 'mouseup', mouseUpHandler);

            e.stopPropagation();
            e.preventDefault();
        });
    }

    var keyboard = function(i) {
        var element = i.element;

        var elementHovered = function () { return matches(element, ':hover'); };
        var scrollbarFocused = function () { return matches(i.scrollbarX, ':focus') || matches(i.scrollbarY, ':focus'); };

        function shouldPreventDefault(deltaX, deltaY) {
            var scrollTop = element.scrollTop;
            if (deltaX === 0) {
                if (!i.scrollbarYActive) {
                    return false;
                }
                if (
                    (scrollTop === 0 && deltaY > 0) ||
                    (scrollTop >= i.contentHeight - i.containerHeight && deltaY < 0)
                ) {
                    return !i.settings.wheelPropagation;
                }
            }

            var scrollLeft = element.scrollLeft;
            if (deltaY === 0) {
                if (!i.scrollbarXActive) {
                    return false;
                }
                if (
                    (scrollLeft === 0 && deltaX < 0) ||
                    (scrollLeft >= i.contentWidth - i.containerWidth && deltaX > 0)
                ) {
                    return !i.settings.wheelPropagation;
                }
            }
            return true;
        }

        i.event.bind(i.ownerDocument, 'keydown', function (e) {
            if (
                (e.isDefaultPrevented && e.isDefaultPrevented()) ||
                e.defaultPrevented
            ) {
                return;
            }

            if (!elementHovered() && !scrollbarFocused()) {
                return;
            }

            var activeElement = document.activeElement
                ? document.activeElement
                : i.ownerDocument.activeElement;
            if (activeElement) {
                if (activeElement.tagName === 'IFRAME') {
                    activeElement = activeElement.contentDocument.activeElement;
                } else {
                    // go deeper if element is a webcomponent
                    while (activeElement.shadowRoot) {
                        activeElement = activeElement.shadowRoot.activeElement;
                    }
                }
                if (isEditable(activeElement)) {
                    return;
                }
            }

            var deltaX = 0;
            var deltaY = 0;

            switch (e.which) {
                case 37: // left
                    if (e.metaKey) {
                        deltaX = -i.contentWidth;
                    } else if (e.altKey) {
                        deltaX = -i.containerWidth;
                    } else {
                        deltaX = -30;
                    }
                    break;
                case 38: // up
                    if (e.metaKey) {
                        deltaY = i.contentHeight;
                    } else if (e.altKey) {
                        deltaY = i.containerHeight;
                    } else {
                        deltaY = 30;
                    }
                    break;
                case 39: // right
                    if (e.metaKey) {
                        deltaX = i.contentWidth;
                    } else if (e.altKey) {
                        deltaX = i.containerWidth;
                    } else {
                        deltaX = 30;
                    }
                    break;
                case 40: // down
                    if (e.metaKey) {
                        deltaY = -i.contentHeight;
                    } else if (e.altKey) {
                        deltaY = -i.containerHeight;
                    } else {
                        deltaY = -30;
                    }
                    break;
                case 32: // space bar
                    if (e.shiftKey) {
                        deltaY = i.containerHeight;
                    } else {
                        deltaY = -i.containerHeight;
                    }
                    break;
                case 33: // page up
                    deltaY = i.containerHeight;
                    break;
                case 34: // page down
                    deltaY = -i.containerHeight;
                    break;
                case 36: // home
                    deltaY = i.contentHeight;
                    break;
                case 35: // end
                    deltaY = -i.contentHeight;
                    break;
                default:
                    return;
            }

            if (i.settings.suppressScrollX && deltaX !== 0) {
                return;
            }
            if (i.settings.suppressScrollY && deltaY !== 0) {
                return;
            }

            element.scrollTop -= deltaY;
            element.scrollLeft += deltaX;
            updateGeometry(i);

            if (shouldPreventDefault(deltaX, deltaY)) {
                e.preventDefault();
            }
        });
    };

    var wheel = function(i) {
        var element = i.element;

        function shouldPreventDefault(deltaX, deltaY) {
            var isTop = element.scrollTop === 0;
            var isBottom =
                element.scrollTop + element.offsetHeight === element.scrollHeight;
            var isLeft = element.scrollLeft === 0;
            var isRight =
                element.scrollLeft + element.offsetWidth === element.offsetWidth;

            var hitsBound;

            // pick axis with primary direction
            if (Math.abs(deltaY) > Math.abs(deltaX)) {
                hitsBound = isTop || isBottom;
            } else {
                hitsBound = isLeft || isRight;
            }

            return hitsBound ? !i.settings.wheelPropagation : true;
        }

        function getDeltaFromEvent(e) {
            var deltaX = e.deltaX;
            var deltaY = -1 * e.deltaY;

            if (typeof deltaX === 'undefined' || typeof deltaY === 'undefined') {
                // OS X Safari
                deltaX = -1 * e.wheelDeltaX / 6;
                deltaY = e.wheelDeltaY / 6;
            }

            if (e.deltaMode && e.deltaMode === 1) {
                // Firefox in deltaMode 1: Line scrolling
                deltaX *= 10;
                deltaY *= 10;
            }

            if (deltaX !== deltaX && deltaY !== deltaY /* NaN checks */) {
                // IE in some mouse drivers
                deltaX = 0;
                deltaY = e.wheelDelta;
            }

            if (e.shiftKey) {
                // reverse axis with shift key
                return [-deltaY, -deltaX];
            }
            return [deltaX, deltaY];
        }

        function shouldBeConsumedByChild(target, deltaX, deltaY) {
            // FIXME: this is a workaround for <select> issue in FF and IE #571
            if (!env.isWebKit && element.querySelector('select:focus')) {
                return true;
            }

            if (!element.contains(target)) {
                return false;
            }

            var cursor = target;

            while (cursor && cursor !== element) {
                if (cursor.classList.contains(cls.element.consuming)) {
                    return true;
                }

                var style = get(cursor);
                var overflow = [style.overflow, style.overflowX, style.overflowY].join(
                    ''
                );

                // if scrollable
                if (overflow.match(/(scroll|auto)/)) {
                    var maxScrollTop = cursor.scrollHeight - cursor.clientHeight;
                    if (maxScrollTop > 0) {
                        if (
                            !(cursor.scrollTop === 0 && deltaY > 0) &&
                            !(cursor.scrollTop === maxScrollTop && deltaY < 0)
                        ) {
                            return true;
                        }
                    }
                    var maxScrollLeft = cursor.scrollLeft - cursor.clientWidth;
                    if (maxScrollLeft > 0) {
                        if (
                            !(cursor.scrollLeft === 0 && deltaX < 0) &&
                            !(cursor.scrollLeft === maxScrollLeft && deltaX > 0)
                        ) {
                            return true;
                        }
                    }
                }

                cursor = cursor.parentNode;
            }

            return false;
        }

        function mousewheelHandler(e) {
            var ref = getDeltaFromEvent(e);
            var deltaX = ref[0];
            var deltaY = ref[1];

            if (shouldBeConsumedByChild(e.target, deltaX, deltaY)) {
                return;
            }

            var shouldPrevent = false;
            if (!i.settings.useBothWheelAxes) {
                // deltaX will only be used for horizontal scrolling and deltaY will
                // only be used for vertical scrolling - this is the default
                element.scrollTop -= deltaY * i.settings.wheelSpeed;
                element.scrollLeft += deltaX * i.settings.wheelSpeed;
            } else if (i.scrollbarYActive && !i.scrollbarXActive) {
                // only vertical scrollbar is active and useBothWheelAxes option is
                // active, so let's scroll vertical bar using both mouse wheel axes
                if (deltaY) {
                    element.scrollTop -= deltaY * i.settings.wheelSpeed;
                } else {
                    element.scrollTop += deltaX * i.settings.wheelSpeed;
                }
                shouldPrevent = true;
            } else if (i.scrollbarXActive && !i.scrollbarYActive) {
                // useBothWheelAxes and only horizontal bar is active, so use both
                // wheel axes for horizontal bar
                if (deltaX) {
                    element.scrollLeft += deltaX * i.settings.wheelSpeed;
                } else {
                    element.scrollLeft -= deltaY * i.settings.wheelSpeed;
                }
                shouldPrevent = true;
            }

            updateGeometry(i);

            shouldPrevent = shouldPrevent || shouldPreventDefault(deltaX, deltaY);
            if (shouldPrevent && !e.ctrlKey) {
                e.stopPropagation();
                e.preventDefault();
            }
        }

        if (typeof window.onwheel !== 'undefined') {
            i.event.bind(element, 'wheel', mousewheelHandler);
        } else if (typeof window.onmousewheel !== 'undefined') {
            i.event.bind(element, 'mousewheel', mousewheelHandler);
        }
    };

    var touch = function(i) {
        if (!env.supportsTouch && !env.supportsIePointer) {
            return;
        }

        var element = i.element;

        function shouldPrevent(deltaX, deltaY) {
            var scrollTop = element.scrollTop;
            var scrollLeft = element.scrollLeft;
            var magnitudeX = Math.abs(deltaX);
            var magnitudeY = Math.abs(deltaY);

            if (magnitudeY > magnitudeX) {
                // user is perhaps trying to swipe up/down the page

                if (
                    (deltaY < 0 && scrollTop === i.contentHeight - i.containerHeight) ||
                    (deltaY > 0 && scrollTop === 0)
                ) {
                    // set prevent for mobile Chrome refresh
                    return window.scrollY === 0 && deltaY > 0 && env.isChrome;
                }
            } else if (magnitudeX > magnitudeY) {
                // user is perhaps trying to swipe left/right across the page

                if (
                    (deltaX < 0 && scrollLeft === i.contentWidth - i.containerWidth) ||
                    (deltaX > 0 && scrollLeft === 0)
                ) {
                    return true;
                }
            }

            return true;
        }

        function applyTouchMove(differenceX, differenceY) {
            element.scrollTop -= differenceY;
            element.scrollLeft -= differenceX;

            updateGeometry(i);
        }

        var startOffset = {};
        var startTime = 0;
        var speed = {};
        var easingLoop = null;

        function getTouch(e) {
            if (e.targetTouches) {
                return e.targetTouches[0];
            } else {
                // Maybe IE pointer
                return e;
            }
        }

        function shouldHandle(e) {
            if (e.pointerType && e.pointerType === 'pen' && e.buttons === 0) {
                return false;
            }
            if (e.targetTouches && e.targetTouches.length === 1) {
                return true;
            }
            if (
                e.pointerType &&
                e.pointerType !== 'mouse' &&
                e.pointerType !== e.MSPOINTER_TYPE_MOUSE
            ) {
                return true;
            }
            return false;
        }

        function touchStart(e) {
            if (!shouldHandle(e)) {
                return;
            }

            var touch = getTouch(e);

            startOffset.pageX = touch.pageX;
            startOffset.pageY = touch.pageY;

            startTime = new Date().getTime();

            if (easingLoop !== null) {
                clearInterval(easingLoop);
            }
        }

        function shouldBeConsumedByChild(target, deltaX, deltaY) {
            if (!element.contains(target)) {
                return false;
            }

            var cursor = target;

            while (cursor && cursor !== element) {
                if (cursor.classList.contains(cls.element.consuming)) {
                    return true;
                }

                var style = get(cursor);
                var overflow = [style.overflow, style.overflowX, style.overflowY].join(
                    ''
                );

                // if scrollable
                if (overflow.match(/(scroll|auto)/)) {
                    var maxScrollTop = cursor.scrollHeight - cursor.clientHeight;
                    if (maxScrollTop > 0) {
                        if (
                            !(cursor.scrollTop === 0 && deltaY > 0) &&
                            !(cursor.scrollTop === maxScrollTop && deltaY < 0)
                        ) {
                            return true;
                        }
                    }
                    var maxScrollLeft = cursor.scrollLeft - cursor.clientWidth;
                    if (maxScrollLeft > 0) {
                        if (
                            !(cursor.scrollLeft === 0 && deltaX < 0) &&
                            !(cursor.scrollLeft === maxScrollLeft && deltaX > 0)
                        ) {
                            return true;
                        }
                    }
                }

                cursor = cursor.parentNode;
            }

            return false;
        }

        function touchMove(e) {
            if (shouldHandle(e)) {
                var touch = getTouch(e);

                var currentOffset = { pageX: touch.pageX, pageY: touch.pageY };

                var differenceX = currentOffset.pageX - startOffset.pageX;
                var differenceY = currentOffset.pageY - startOffset.pageY;

                if (shouldBeConsumedByChild(e.target, differenceX, differenceY)) {
                    return;
                }

                applyTouchMove(differenceX, differenceY);
                startOffset = currentOffset;

                var currentTime = new Date().getTime();

                var timeGap = currentTime - startTime;
                if (timeGap > 0) {
                    speed.x = differenceX / timeGap;
                    speed.y = differenceY / timeGap;
                    startTime = currentTime;
                }

                if (shouldPrevent(differenceX, differenceY)) {
                    e.preventDefault();
                }
            }
        }
        function touchEnd() {
            if (i.settings.swipeEasing) {
                clearInterval(easingLoop);
                easingLoop = setInterval(function() {
                    if (i.isInitialized) {
                        clearInterval(easingLoop);
                        return;
                    }

                    if (!speed.x && !speed.y) {
                        clearInterval(easingLoop);
                        return;
                    }

                    if (Math.abs(speed.x) < 0.01 && Math.abs(speed.y) < 0.01) {
                        clearInterval(easingLoop);
                        return;
                    }

                    applyTouchMove(speed.x * 30, speed.y * 30);

                    speed.x *= 0.8;
                    speed.y *= 0.8;
                }, 10);
            }
        }

        if (env.supportsTouch) {
            i.event.bind(element, 'touchstart', touchStart);
            i.event.bind(element, 'touchmove', touchMove);
            i.event.bind(element, 'touchend', touchEnd);
        } else if (env.supportsIePointer) {
            if (window.PointerEvent) {
                i.event.bind(element, 'pointerdown', touchStart);
                i.event.bind(element, 'pointermove', touchMove);
                i.event.bind(element, 'pointerup', touchEnd);
            } else if (window.MSPointerEvent) {
                i.event.bind(element, 'MSPointerDown', touchStart);
                i.event.bind(element, 'MSPointerMove', touchMove);
                i.event.bind(element, 'MSPointerUp', touchEnd);
            }
        }
    };

    var defaultSettings = function () { return ({
        handlers: ['click-rail', 'drag-thumb', 'keyboard', 'wheel', 'touch'],
        maxScrollbarLength: null,
        minScrollbarLength: null,
        scrollingThreshold: 1000,
        scrollXMarginOffset: 0,
        scrollYMarginOffset: 0,
        suppressScrollX: false,
        suppressScrollY: false,
        swipeEasing: true,
        useBothWheelAxes: false,
        wheelPropagation: false,
        wheelSpeed: 1,
    }); };

    var handlers = {
        'click-rail': clickRail,
        'drag-thumb': dragThumb,
        keyboard: keyboard,
        wheel: wheel,
        touch: touch,
    };

    var PerfectScrollbar = function PerfectScrollbar(element, userSettings) {
        var this$1 = this;
        if ( userSettings === void 0 ) userSettings = {};

        if (typeof element === 'string') {
            element = document.querySelector(element);
        }

        if (!element || !element.nodeName) {
            throw new Error('no element is specified to initialize PerfectScrollbar');
        }

        this.element = element;

        element.classList.add(cls.main);

        this.settings = defaultSettings();
        for (var key in userSettings) {
            this$1.settings[key] = userSettings[key];
        }

        this.containerWidth = null;
        this.containerHeight = null;
        this.contentWidth = null;
        this.contentHeight = null;

        var focus = function () { return element.classList.add(cls.state.focus); };
        var blur = function () { return element.classList.remove(cls.state.focus); };

        this.isRtl = get(element).direction === 'rtl';
        this.isNegativeScroll = (function () {
            var originalScrollLeft = element.scrollLeft;
            var result = null;
            element.scrollLeft = -1;
            result = element.scrollLeft < 0;
            element.scrollLeft = originalScrollLeft;
            return result;
        })();
        this.negativeScrollAdjustment = this.isNegativeScroll
            ? element.scrollWidth - element.clientWidth
            : 0;
        this.event = new EventManager();
        this.ownerDocument = element.ownerDocument || document;

        this.scrollbarXRail = div(cls.element.rail('x'));
        element.appendChild(this.scrollbarXRail);
        this.scrollbarX = div(cls.element.thumb('x'));
        this.scrollbarXRail.appendChild(this.scrollbarX);
        this.scrollbarX.setAttribute('tabindex', 0);
        this.event.bind(this.scrollbarX, 'focus', focus);
        this.event.bind(this.scrollbarX, 'blur', blur);
        this.scrollbarXActive = null;
        this.scrollbarXWidth = null;
        this.scrollbarXLeft = null;
        var railXStyle = get(this.scrollbarXRail);
        this.scrollbarXBottom = parseInt(railXStyle.bottom, 10);
        if (isNaN(this.scrollbarXBottom)) {
            this.isScrollbarXUsingBottom = false;
            this.scrollbarXTop = toInt(railXStyle.top);
        } else {
            this.isScrollbarXUsingBottom = true;
        }
        this.railBorderXWidth =
            toInt(railXStyle.borderLeftWidth) + toInt(railXStyle.borderRightWidth);
        // Set rail to display:block to calculate margins
        set(this.scrollbarXRail, { display: 'block' });
        this.railXMarginWidth =
            toInt(railXStyle.marginLeft) + toInt(railXStyle.marginRight);
        set(this.scrollbarXRail, { display: '' });
        this.railXWidth = null;
        this.railXRatio = null;

        this.scrollbarYRail = div(cls.element.rail('y'));
        element.appendChild(this.scrollbarYRail);
        this.scrollbarY = div(cls.element.thumb('y'));
        this.scrollbarYRail.appendChild(this.scrollbarY);
        this.scrollbarY.setAttribute('tabindex', 0);
        this.event.bind(this.scrollbarY, 'focus', focus);
        this.event.bind(this.scrollbarY, 'blur', blur);
        this.scrollbarYActive = null;
        this.scrollbarYHeight = null;
        this.scrollbarYTop = null;
        var railYStyle = get(this.scrollbarYRail);
        this.scrollbarYRight = parseInt(railYStyle.right, 10);
        if (isNaN(this.scrollbarYRight)) {
            this.isScrollbarYUsingRight = false;
            this.scrollbarYLeft = toInt(railYStyle.left);
        } else {
            this.isScrollbarYUsingRight = true;
        }
        this.scrollbarYOuterWidth = this.isRtl ? outerWidth(this.scrollbarY) : null;
        this.railBorderYWidth =
            toInt(railYStyle.borderTopWidth) + toInt(railYStyle.borderBottomWidth);
        set(this.scrollbarYRail, { display: 'block' });
        this.railYMarginHeight =
            toInt(railYStyle.marginTop) + toInt(railYStyle.marginBottom);
        set(this.scrollbarYRail, { display: '' });
        this.railYHeight = null;
        this.railYRatio = null;

        this.reach = {
            x:
                element.scrollLeft <= 0
                    ? 'start'
                    : element.scrollLeft >= this.contentWidth - this.containerWidth
                    ? 'end'
                    : null,
            y:
                element.scrollTop <= 0
                    ? 'start'
                    : element.scrollTop >= this.contentHeight - this.containerHeight
                    ? 'end'
                    : null,
        };

        this.isAlive = true;

        this.settings.handlers.forEach(function (handlerName) { return handlers[handlerName](this$1); });

        this.lastScrollTop = element.scrollTop; // for onScroll only
        this.lastScrollLeft = element.scrollLeft; // for onScroll only
        this.event.bind(this.element, 'scroll', function (e) { return this$1.onScroll(e); });
        updateGeometry(this);
    };

    PerfectScrollbar.prototype.update = function update () {
        if (!this.isAlive) {
            return;
        }

        // Recalcuate negative scrollLeft adjustment
        this.negativeScrollAdjustment = this.isNegativeScroll
            ? this.element.scrollWidth - this.element.clientWidth
            : 0;

        // Recalculate rail margins
        set(this.scrollbarXRail, { display: 'block' });
        set(this.scrollbarYRail, { display: 'block' });
        this.railXMarginWidth =
            toInt(get(this.scrollbarXRail).marginLeft) +
            toInt(get(this.scrollbarXRail).marginRight);
        this.railYMarginHeight =
            toInt(get(this.scrollbarYRail).marginTop) +
            toInt(get(this.scrollbarYRail).marginBottom);

        // Hide scrollbars not to affect scrollWidth and scrollHeight
        set(this.scrollbarXRail, { display: 'none' });
        set(this.scrollbarYRail, { display: 'none' });

        updateGeometry(this);

        processScrollDiff(this, 'top', 0, false, true);
        processScrollDiff(this, 'left', 0, false, true);

        set(this.scrollbarXRail, { display: '' });
        set(this.scrollbarYRail, { display: '' });
    };

    PerfectScrollbar.prototype.onScroll = function onScroll (e) {
        if (!this.isAlive) {
            return;
        }

        updateGeometry(this);
        processScrollDiff(this, 'top', this.element.scrollTop - this.lastScrollTop);
        processScrollDiff(
            this,
            'left',
            this.element.scrollLeft - this.lastScrollLeft
        );

        this.lastScrollTop = this.element.scrollTop;
        this.lastScrollLeft = this.element.scrollLeft;
    };

    PerfectScrollbar.prototype.destroy = function destroy () {
        if (!this.isAlive) {
            return;
        }

        this.event.unbindAll();
        remove(this.scrollbarX);
        remove(this.scrollbarY);
        remove(this.scrollbarXRail);
        remove(this.scrollbarYRail);
        this.removePsClasses();

        // unset elements
        this.element = null;
        this.scrollbarX = null;
        this.scrollbarY = null;
        this.scrollbarXRail = null;
        this.scrollbarYRail = null;

        this.isAlive = false;
    };

    PerfectScrollbar.prototype.removePsClasses = function removePsClasses () {
        this.element.className = this.element.className
            .split(' ')
            .filter(function (name) { return !name.match(/^ps([-_].+|)$/); })
            .join(' ');
    };

    return PerfectScrollbar;

})));