1326 lines
36 KiB
JavaScript
1326 lines
36 KiB
JavaScript
/*!
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* perfect-scrollbar v1.4.0
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* (c) 2018 Hyunje Jun
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* @license MIT
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*/
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(function (global, factory) {
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typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
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typeof define === 'function' && define.amd ? define(factory) :
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(global.PerfectScrollbar = factory());
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}(this, (function () { 'use strict';
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function get(element) {
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return getComputedStyle(element);
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}
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function set(element, obj) {
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for (var key in obj) {
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var val = obj[key];
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if (typeof val === 'number') {
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val = val + "px";
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}
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element.style[key] = val;
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}
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return element;
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}
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function div(className) {
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var div = document.createElement('div');
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div.className = className;
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return div;
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}
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var elMatches =
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typeof Element !== 'undefined' &&
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(Element.prototype.matches ||
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Element.prototype.webkitMatchesSelector ||
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Element.prototype.mozMatchesSelector ||
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Element.prototype.msMatchesSelector);
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function matches(element, query) {
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if (!elMatches) {
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throw new Error('No element matching method supported');
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}
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return elMatches.call(element, query);
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}
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function remove(element) {
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if (element.remove) {
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element.remove();
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} else {
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if (element.parentNode) {
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element.parentNode.removeChild(element);
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}
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}
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}
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function queryChildren(element, selector) {
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return Array.prototype.filter.call(element.children, function (child) { return matches(child, selector); }
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);
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}
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var cls = {
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main: 'ps',
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element: {
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thumb: function (x) { return ("ps__thumb-" + x); },
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rail: function (x) { return ("ps__rail-" + x); },
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consuming: 'ps__child--consume',
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},
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state: {
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focus: 'ps--focus',
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clicking: 'ps--clicking',
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active: function (x) { return ("ps--active-" + x); },
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scrolling: function (x) { return ("ps--scrolling-" + x); },
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},
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};
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/*
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* Helper methods
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*/
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var scrollingClassTimeout = { x: null, y: null };
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function addScrollingClass(i, x) {
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var classList = i.element.classList;
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var className = cls.state.scrolling(x);
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if (classList.contains(className)) {
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clearTimeout(scrollingClassTimeout[x]);
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} else {
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classList.add(className);
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}
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}
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function removeScrollingClass(i, x) {
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scrollingClassTimeout[x] = setTimeout(
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function () { return i.isAlive && i.element.classList.remove(cls.state.scrolling(x)); },
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i.settings.scrollingThreshold
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);
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}
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function setScrollingClassInstantly(i, x) {
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addScrollingClass(i, x);
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removeScrollingClass(i, x);
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}
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var EventElement = function EventElement(element) {
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this.element = element;
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this.handlers = {};
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};
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var prototypeAccessors = { isEmpty: { configurable: true } };
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EventElement.prototype.bind = function bind (eventName, handler) {
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if (typeof this.handlers[eventName] === 'undefined') {
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this.handlers[eventName] = [];
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}
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this.handlers[eventName].push(handler);
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this.element.addEventListener(eventName, handler, false);
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};
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EventElement.prototype.unbind = function unbind (eventName, target) {
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var this$1 = this;
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this.handlers[eventName] = this.handlers[eventName].filter(function (handler) {
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if (target && handler !== target) {
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return true;
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}
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this$1.element.removeEventListener(eventName, handler, false);
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return false;
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});
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};
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EventElement.prototype.unbindAll = function unbindAll () {
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var this$1 = this;
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for (var name in this$1.handlers) {
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this$1.unbind(name);
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}
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};
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prototypeAccessors.isEmpty.get = function () {
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var this$1 = this;
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return Object.keys(this.handlers).every(
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function (key) { return this$1.handlers[key].length === 0; }
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);
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};
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Object.defineProperties( EventElement.prototype, prototypeAccessors );
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var EventManager = function EventManager() {
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this.eventElements = [];
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};
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EventManager.prototype.eventElement = function eventElement (element) {
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var ee = this.eventElements.filter(function (ee) { return ee.element === element; })[0];
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if (!ee) {
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ee = new EventElement(element);
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this.eventElements.push(ee);
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}
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return ee;
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};
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EventManager.prototype.bind = function bind (element, eventName, handler) {
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this.eventElement(element).bind(eventName, handler);
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};
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EventManager.prototype.unbind = function unbind (element, eventName, handler) {
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var ee = this.eventElement(element);
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ee.unbind(eventName, handler);
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if (ee.isEmpty) {
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// remove
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this.eventElements.splice(this.eventElements.indexOf(ee), 1);
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}
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};
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EventManager.prototype.unbindAll = function unbindAll () {
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this.eventElements.forEach(function (e) { return e.unbindAll(); });
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this.eventElements = [];
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};
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EventManager.prototype.once = function once (element, eventName, handler) {
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var ee = this.eventElement(element);
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var onceHandler = function (evt) {
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ee.unbind(eventName, onceHandler);
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handler(evt);
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};
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ee.bind(eventName, onceHandler);
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};
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function createEvent(name) {
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if (typeof window.CustomEvent === 'function') {
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return new CustomEvent(name);
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} else {
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var evt = document.createEvent('CustomEvent');
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evt.initCustomEvent(name, false, false, undefined);
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return evt;
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}
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}
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var processScrollDiff = function(
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i,
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axis,
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diff,
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useScrollingClass,
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forceFireReachEvent
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) {
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if ( useScrollingClass === void 0 ) useScrollingClass = true;
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if ( forceFireReachEvent === void 0 ) forceFireReachEvent = false;
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var fields;
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if (axis === 'top') {
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fields = [
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'contentHeight',
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'containerHeight',
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'scrollTop',
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'y',
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'up',
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'down' ];
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} else if (axis === 'left') {
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fields = [
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'contentWidth',
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'containerWidth',
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'scrollLeft',
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'x',
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'left',
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'right' ];
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} else {
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throw new Error('A proper axis should be provided');
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}
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processScrollDiff$1(i, diff, fields, useScrollingClass, forceFireReachEvent);
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};
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function processScrollDiff$1(
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i,
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diff,
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ref,
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useScrollingClass,
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forceFireReachEvent
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) {
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var contentHeight = ref[0];
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var containerHeight = ref[1];
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var scrollTop = ref[2];
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var y = ref[3];
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var up = ref[4];
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var down = ref[5];
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if ( useScrollingClass === void 0 ) useScrollingClass = true;
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if ( forceFireReachEvent === void 0 ) forceFireReachEvent = false;
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var element = i.element;
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// reset reach
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i.reach[y] = null;
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// 1 for subpixel rounding
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if (element[scrollTop] < 1) {
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i.reach[y] = 'start';
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}
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// 1 for subpixel rounding
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if (element[scrollTop] > i[contentHeight] - i[containerHeight] - 1) {
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i.reach[y] = 'end';
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}
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if (diff) {
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element.dispatchEvent(createEvent(("ps-scroll-" + y)));
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if (diff < 0) {
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element.dispatchEvent(createEvent(("ps-scroll-" + up)));
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} else if (diff > 0) {
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element.dispatchEvent(createEvent(("ps-scroll-" + down)));
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}
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if (useScrollingClass) {
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setScrollingClassInstantly(i, y);
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}
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}
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if (i.reach[y] && (diff || forceFireReachEvent)) {
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element.dispatchEvent(createEvent(("ps-" + y + "-reach-" + (i.reach[y]))));
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}
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}
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function toInt(x) {
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return parseInt(x, 10) || 0;
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}
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function isEditable(el) {
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return (
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matches(el, 'input,[contenteditable]') ||
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matches(el, 'select,[contenteditable]') ||
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matches(el, 'textarea,[contenteditable]') ||
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matches(el, 'button,[contenteditable]')
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);
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}
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function outerWidth(element) {
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var styles = get(element);
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return (
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toInt(styles.width) +
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toInt(styles.paddingLeft) +
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toInt(styles.paddingRight) +
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toInt(styles.borderLeftWidth) +
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toInt(styles.borderRightWidth)
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);
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}
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var env = {
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isWebKit:
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typeof document !== 'undefined' &&
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'WebkitAppearance' in document.documentElement.style,
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supportsTouch:
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typeof window !== 'undefined' &&
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('ontouchstart' in window ||
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(window.DocumentTouch && document instanceof window.DocumentTouch)),
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supportsIePointer:
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typeof navigator !== 'undefined' && navigator.msMaxTouchPoints,
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isChrome:
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typeof navigator !== 'undefined' &&
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/Chrome/i.test(navigator && navigator.userAgent),
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};
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var updateGeometry = function(i) {
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var element = i.element;
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var roundedScrollTop = Math.floor(element.scrollTop);
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var rect = element.getBoundingClientRect();
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i.containerWidth = Math.ceil(rect.width);
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i.containerHeight = Math.ceil(rect.height);
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i.contentWidth = element.scrollWidth;
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i.contentHeight = element.scrollHeight;
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if (!element.contains(i.scrollbarXRail)) {
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// clean up and append
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queryChildren(element, cls.element.rail('x')).forEach(function (el) { return remove(el); }
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);
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element.appendChild(i.scrollbarXRail);
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}
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if (!element.contains(i.scrollbarYRail)) {
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// clean up and append
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queryChildren(element, cls.element.rail('y')).forEach(function (el) { return remove(el); }
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);
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element.appendChild(i.scrollbarYRail);
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}
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if (
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!i.settings.suppressScrollX &&
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i.containerWidth + i.settings.scrollXMarginOffset < i.contentWidth
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) {
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i.scrollbarXActive = true;
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i.railXWidth = i.containerWidth - i.railXMarginWidth;
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i.railXRatio = i.containerWidth / i.railXWidth;
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i.scrollbarXWidth = getThumbSize(
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i,
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toInt(i.railXWidth * i.containerWidth / i.contentWidth)
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);
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i.scrollbarXLeft = toInt(
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(i.negativeScrollAdjustment + element.scrollLeft) *
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(i.railXWidth - i.scrollbarXWidth) /
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(i.contentWidth - i.containerWidth)
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);
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} else {
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i.scrollbarXActive = false;
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}
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if (
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!i.settings.suppressScrollY &&
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i.containerHeight + i.settings.scrollYMarginOffset < i.contentHeight
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) {
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i.scrollbarYActive = true;
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i.railYHeight = i.containerHeight - i.railYMarginHeight;
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i.railYRatio = i.containerHeight / i.railYHeight;
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i.scrollbarYHeight = getThumbSize(
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i,
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toInt(i.railYHeight * i.containerHeight / i.contentHeight)
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);
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i.scrollbarYTop = toInt(
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roundedScrollTop *
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(i.railYHeight - i.scrollbarYHeight) /
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(i.contentHeight - i.containerHeight)
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);
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} else {
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i.scrollbarYActive = false;
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}
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if (i.scrollbarXLeft >= i.railXWidth - i.scrollbarXWidth) {
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i.scrollbarXLeft = i.railXWidth - i.scrollbarXWidth;
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}
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if (i.scrollbarYTop >= i.railYHeight - i.scrollbarYHeight) {
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i.scrollbarYTop = i.railYHeight - i.scrollbarYHeight;
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}
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updateCss(element, i);
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if (i.scrollbarXActive) {
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element.classList.add(cls.state.active('x'));
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} else {
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element.classList.remove(cls.state.active('x'));
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i.scrollbarXWidth = 0;
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i.scrollbarXLeft = 0;
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element.scrollLeft = 0;
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}
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if (i.scrollbarYActive) {
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element.classList.add(cls.state.active('y'));
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} else {
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element.classList.remove(cls.state.active('y'));
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i.scrollbarYHeight = 0;
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i.scrollbarYTop = 0;
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element.scrollTop = 0;
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}
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};
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function getThumbSize(i, thumbSize) {
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if (i.settings.minScrollbarLength) {
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thumbSize = Math.max(thumbSize, i.settings.minScrollbarLength);
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}
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if (i.settings.maxScrollbarLength) {
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thumbSize = Math.min(thumbSize, i.settings.maxScrollbarLength);
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}
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return thumbSize;
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}
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function updateCss(element, i) {
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var xRailOffset = { width: i.railXWidth };
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var roundedScrollTop = Math.floor(element.scrollTop);
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if (i.isRtl) {
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xRailOffset.left =
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i.negativeScrollAdjustment +
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element.scrollLeft +
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i.containerWidth -
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i.contentWidth;
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} else {
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xRailOffset.left = element.scrollLeft;
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}
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if (i.isScrollbarXUsingBottom) {
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xRailOffset.bottom = i.scrollbarXBottom - roundedScrollTop;
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} else {
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xRailOffset.top = i.scrollbarXTop + roundedScrollTop;
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}
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set(i.scrollbarXRail, xRailOffset);
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var yRailOffset = { top: roundedScrollTop, height: i.railYHeight };
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if (i.isScrollbarYUsingRight) {
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if (i.isRtl) {
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yRailOffset.right =
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i.contentWidth -
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(i.negativeScrollAdjustment + element.scrollLeft) -
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i.scrollbarYRight -
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i.scrollbarYOuterWidth;
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} else {
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yRailOffset.right = i.scrollbarYRight - element.scrollLeft;
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}
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} else {
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if (i.isRtl) {
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yRailOffset.left =
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i.negativeScrollAdjustment +
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element.scrollLeft +
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i.containerWidth * 2 -
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i.contentWidth -
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i.scrollbarYLeft -
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i.scrollbarYOuterWidth;
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} else {
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yRailOffset.left = i.scrollbarYLeft + element.scrollLeft;
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}
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}
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set(i.scrollbarYRail, yRailOffset);
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set(i.scrollbarX, {
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left: i.scrollbarXLeft,
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width: i.scrollbarXWidth - i.railBorderXWidth,
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});
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set(i.scrollbarY, {
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top: i.scrollbarYTop,
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height: i.scrollbarYHeight - i.railBorderYWidth,
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});
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}
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var clickRail = function(i) {
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i.event.bind(i.scrollbarY, 'mousedown', function (e) { return e.stopPropagation(); });
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i.event.bind(i.scrollbarYRail, 'mousedown', function (e) {
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var positionTop =
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e.pageY -
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window.pageYOffset -
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i.scrollbarYRail.getBoundingClientRect().top;
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var direction = positionTop > i.scrollbarYTop ? 1 : -1;
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i.element.scrollTop += direction * i.containerHeight;
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updateGeometry(i);
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e.stopPropagation();
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});
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i.event.bind(i.scrollbarX, 'mousedown', function (e) { return e.stopPropagation(); });
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i.event.bind(i.scrollbarXRail, 'mousedown', function (e) {
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var positionLeft =
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e.pageX -
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window.pageXOffset -
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i.scrollbarXRail.getBoundingClientRect().left;
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var direction = positionLeft > i.scrollbarXLeft ? 1 : -1;
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i.element.scrollLeft += direction * i.containerWidth;
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updateGeometry(i);
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e.stopPropagation();
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});
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};
|
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|
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var dragThumb = function(i) {
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bindMouseScrollHandler(i, [
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'containerWidth',
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'contentWidth',
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'pageX',
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'railXWidth',
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'scrollbarX',
|
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'scrollbarXWidth',
|
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'scrollLeft',
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'x',
|
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'scrollbarXRail' ]);
|
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bindMouseScrollHandler(i, [
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'containerHeight',
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'contentHeight',
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'pageY',
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'railYHeight',
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'scrollbarY',
|
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'scrollbarYHeight',
|
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'scrollTop',
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'y',
|
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'scrollbarYRail' ]);
|
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};
|
|
|
|
function bindMouseScrollHandler(
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i,
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ref
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) {
|
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var containerHeight = ref[0];
|
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var contentHeight = ref[1];
|
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var pageY = ref[2];
|
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var railYHeight = ref[3];
|
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var scrollbarY = ref[4];
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var scrollbarYHeight = ref[5];
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var scrollTop = ref[6];
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var y = ref[7];
|
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var scrollbarYRail = ref[8];
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|
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var element = i.element;
|
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|
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var startingScrollTop = null;
|
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var startingMousePageY = null;
|
|
var scrollBy = null;
|
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|
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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[scrollbarYRail].classList.remove(cls.state.clicking);
|
|
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);
|
|
|
|
i[scrollbarYRail].classList.add(cls.state.clicking);
|
|
|
|
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 = Math.floor(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 roundedScrollTop = Math.floor(element.scrollTop);
|
|
var isTop = element.scrollTop === 0;
|
|
var isBottom =
|
|
roundedScrollTop + element.offsetHeight === element.scrollHeight;
|
|
var isLeft = element.scrollLeft === 0;
|
|
var isRight =
|
|
element.scrollLeft + element.offsetWidth === element.scrollWidth;
|
|
|
|
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.scrollWidth - 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 = Math.floor(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: true,
|
|
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 = Math.floor(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 = Math.floor(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;
|
|
|
|
})));
|