uikit/dist/js/components/slideshow.js

UIkit is a lightweight and modular front-end framework for developing fast and powerful web interfaces.

/*! UIkit 3.6.19 | https://www.getuikit.com | (c) 2014 - 2021 YOOtheme | MIT License */

(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('uikit-util')) :
    typeof define === 'function' && define.amd ? define('uikitslideshow', ['uikit-util'], factory) :
    (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.UIkitSlideshow = factory(global.UIkit.util));
}(this, (function (uikitUtil) { 'use strict';

    var Class = {

        connected: function() {
            !uikitUtil.hasClass(this.$el, this.$name) && uikitUtil.addClass(this.$el, this.$name);
        }

    };

    var Animations = {

        slide: {

            show: function(dir) {
                return [
                    {transform: translate(dir * -100)},
                    {transform: translate()}
                ];
            },

            percent: function(current) {
                return translated(current);
            },

            translate: function(percent, dir) {
                return [
                    {transform: translate(dir * -100 * percent)},
                    {transform: translate(dir * 100 * (1 - percent))}
                ];
            }

        }

    };

    function translated(el) {
        return Math.abs(uikitUtil.css(el, 'transform').split(',')[4] / el.offsetWidth) || 0;
    }

    function translate(value, unit) {
        if ( value === void 0 ) value = 0;
        if ( unit === void 0 ) unit = '%';

        value += value ? unit : '';
        return uikitUtil.isIE ? ("translateX(" + value + ")") : ("translate3d(" + value + ", 0, 0)"); // currently not translate3d in IE, translate3d within translate3d does not work while transitioning
    }

    function scale3d(value) {
        return ("scale3d(" + value + ", " + value + ", 1)");
    }

    function Transitioner(prev, next, dir, ref) {
        var animation = ref.animation;
        var easing = ref.easing;


        var percent = animation.percent;
        var translate = animation.translate;
        var show = animation.show; if ( show === void 0 ) show = uikitUtil.noop;
        var props = show(dir);
        var deferred = new uikitUtil.Deferred();

        return {

            dir: dir,

            show: function(duration, percent, linear) {
                var this$1 = this;
                if ( percent === void 0 ) percent = 0;


                var timing = linear ? 'linear' : easing;
                duration -= Math.round(duration * uikitUtil.clamp(percent, -1, 1));

                this.translate(percent);

                triggerUpdate(next, 'itemin', {percent: percent, duration: duration, timing: timing, dir: dir});
                triggerUpdate(prev, 'itemout', {percent: 1 - percent, duration: duration, timing: timing, dir: dir});

                uikitUtil.Promise.all([
                    uikitUtil.Transition.start(next, props[1], duration, timing),
                    uikitUtil.Transition.start(prev, props[0], duration, timing)
                ]).then(function () {
                    this$1.reset();
                    deferred.resolve();
                }, uikitUtil.noop);

                return deferred.promise;
            },

            cancel: function() {
                uikitUtil.Transition.cancel([next, prev]);
            },

            reset: function() {
                for (var prop in props[0]) {
                    uikitUtil.css([next, prev], prop, '');
                }
            },

            forward: function(duration, percent) {
                if ( percent === void 0 ) percent = this.percent();

                uikitUtil.Transition.cancel([next, prev]);
                return this.show(duration, percent, true);
            },

            translate: function(percent) {

                this.reset();

                var props = translate(percent, dir);
                uikitUtil.css(next, props[1]);
                uikitUtil.css(prev, props[0]);
                triggerUpdate(next, 'itemtranslatein', {percent: percent, dir: dir});
                triggerUpdate(prev, 'itemtranslateout', {percent: 1 - percent, dir: dir});

            },

            percent: function() {
                return percent(prev || next, next, dir);
            },

            getDistance: function() {
                return prev && prev.offsetWidth;
            }

        };

    }

    function triggerUpdate(el, type, data) {
        uikitUtil.trigger(el, uikitUtil.createEvent(type, false, false, data));
    }

    var SliderAutoplay = {

        props: {
            autoplay: Boolean,
            autoplayInterval: Number,
            pauseOnHover: Boolean
        },

        data: {
            autoplay: false,
            autoplayInterval: 7000,
            pauseOnHover: true
        },

        connected: function() {
            this.autoplay && this.startAutoplay();
        },

        disconnected: function() {
            this.stopAutoplay();
        },

        update: function() {
            uikitUtil.attr(this.slides, 'tabindex', '-1');
        },

        events: [

            {

                name: 'visibilitychange',

                el: function() {
                    return document;
                },

                filter: function() {
                    return this.autoplay;
                },

                handler: function() {
                    if (document.hidden) {
                        this.stopAutoplay();
                    } else {
                        this.startAutoplay();
                    }
                }

            }

        ],

        methods: {

            startAutoplay: function() {
                var this$1 = this;


                this.stopAutoplay();

                this.interval = setInterval(
                    function () { return (!this$1.draggable || !uikitUtil.$(':focus', this$1.$el))
                        && (!this$1.pauseOnHover || !uikitUtil.matches(this$1.$el, ':hover'))
                        && !this$1.stack.length
                        && this$1.show('next'); },
                    this.autoplayInterval
                );

            },

            stopAutoplay: function() {
                this.interval && clearInterval(this.interval);
            }

        }

    };

    var SliderDrag = {

        props: {
            draggable: Boolean
        },

        data: {
            draggable: true,
            threshold: 10
        },

        created: function() {
            var this$1 = this;


            ['start', 'move', 'end'].forEach(function (key) {

                var fn = this$1[key];
                this$1[key] = function (e) {

                    var pos = uikitUtil.getEventPos(e).x * (uikitUtil.isRtl ? -1 : 1);

                    this$1.prevPos = pos !== this$1.pos ? this$1.pos : this$1.prevPos;
                    this$1.pos = pos;

                    fn(e);
                };

            });

        },

        events: [

            {

                name: uikitUtil.pointerDown,

                delegate: function() {
                    return this.selSlides;
                },

                handler: function(e) {

                    if (!this.draggable
                        || !uikitUtil.isTouch(e) && hasTextNodesOnly(e.target)
                        || uikitUtil.closest(e.target, uikitUtil.selInput)
                        || e.button > 0
                        || this.length < 2
                    ) {
                        return;
                    }

                    this.start(e);
                }

            },

            {
                name: 'dragstart',

                handler: function(e) {
                    e.preventDefault();
                }
            }

        ],

        methods: {

            start: function() {

                this.drag = this.pos;

                if (this._transitioner) {

                    this.percent = this._transitioner.percent();
                    this.drag += this._transitioner.getDistance() * this.percent * this.dir;

                    this._transitioner.cancel();
                    this._transitioner.translate(this.percent);

                    this.dragging = true;

                    this.stack = [];

                } else {
                    this.prevIndex = this.index;
                }

                uikitUtil.on(document, uikitUtil.pointerMove, this.move, {passive: false});

                // 'input' event is triggered by video controls
                uikitUtil.on(document, (uikitUtil.pointerUp + " " + uikitUtil.pointerCancel + " input"), this.end, true);

                uikitUtil.css(this.list, 'userSelect', 'none');

            },

            move: function(e) {
                var this$1 = this;


                var distance = this.pos - this.drag;

                if (distance === 0 || this.prevPos === this.pos || !this.dragging && Math.abs(distance) < this.threshold) {
                    return;
                }

                // prevent click event
                uikitUtil.css(this.list, 'pointerEvents', 'none');

                e.cancelable && e.preventDefault();

                this.dragging = true;
                this.dir = (distance < 0 ? 1 : -1);

                var ref = this;
                var slides = ref.slides;
                var ref$1 = this;
                var prevIndex = ref$1.prevIndex;
                var dis = Math.abs(distance);
                var nextIndex = this.getIndex(prevIndex + this.dir, prevIndex);
                var width = this._getDistance(prevIndex, nextIndex) || slides[prevIndex].offsetWidth;

                while (nextIndex !== prevIndex && dis > width) {

                    this.drag -= width * this.dir;

                    prevIndex = nextIndex;
                    dis -= width;
                    nextIndex = this.getIndex(prevIndex + this.dir, prevIndex);
                    width = this._getDistance(prevIndex, nextIndex) || slides[prevIndex].offsetWidth;

                }

                this.percent = dis / width;

                var prev = slides[prevIndex];
                var next = slides[nextIndex];
                var changed = this.index !== nextIndex;
                var edge = prevIndex === nextIndex;

                var itemShown;

                [this.index, this.prevIndex].filter(function (i) { return !uikitUtil.includes([nextIndex, prevIndex], i); }).forEach(function (i) {
                    uikitUtil.trigger(slides[i], 'itemhidden', [this$1]);

                    if (edge) {
                        itemShown = true;
                        this$1.prevIndex = prevIndex;
                    }

                });

                if (this.index === prevIndex && this.prevIndex !== prevIndex || itemShown) {
                    uikitUtil.trigger(slides[this.index], 'itemshown', [this]);
                }

                if (changed) {
                    this.prevIndex = prevIndex;
                    this.index = nextIndex;

                    !edge && uikitUtil.trigger(prev, 'beforeitemhide', [this]);
                    uikitUtil.trigger(next, 'beforeitemshow', [this]);
                }

                this._transitioner = this._translate(Math.abs(this.percent), prev, !edge && next);

                if (changed) {
                    !edge && uikitUtil.trigger(prev, 'itemhide', [this]);
                    uikitUtil.trigger(next, 'itemshow', [this]);
                }

            },

            end: function() {

                uikitUtil.off(document, uikitUtil.pointerMove, this.move, {passive: false});
                uikitUtil.off(document, (uikitUtil.pointerUp + " " + uikitUtil.pointerCancel + " input"), this.end, true);

                if (this.dragging) {

                    this.dragging = null;

                    if (this.index === this.prevIndex) {
                        this.percent = 1 - this.percent;
                        this.dir *= -1;
                        this._show(false, this.index, true);
                        this._transitioner = null;
                    } else {

                        var dirChange = (uikitUtil.isRtl ? this.dir * (uikitUtil.isRtl ? 1 : -1) : this.dir) < 0 === this.prevPos > this.pos;
                        this.index = dirChange ? this.index : this.prevIndex;

                        if (dirChange) {
                            this.percent = 1 - this.percent;
                        }

                        this.show(this.dir > 0 && !dirChange || this.dir < 0 && dirChange ? 'next' : 'previous', true);
                    }

                }

                uikitUtil.css(this.list, {userSelect: '', pointerEvents: ''});

                this.drag
                    = this.percent
                    = null;

            }

        }

    };

    function hasTextNodesOnly(el) {
        return !el.children.length && el.childNodes.length;
    }

    var SliderNav = {

        data: {
            selNav: false
        },

        computed: {

            nav: function(ref, $el) {
                var selNav = ref.selNav;

                return uikitUtil.$(selNav, $el);
            },

            selNavItem: function(ref) {
                var attrItem = ref.attrItem;

                return ("[" + attrItem + "],[data-" + attrItem + "]");
            },

            navItems: function(_, $el) {
                return uikitUtil.$$(this.selNavItem, $el);
            }

        },

        update: {

            write: function() {
                var this$1 = this;


                if (this.nav && this.length !== this.nav.children.length) {
                    uikitUtil.html(this.nav, this.slides.map(function (_, i) { return ("<li " + (this$1.attrItem) + "=\"" + i + "\"><a href></a></li>"); }).join(''));
                }

                this.navItems.concat(this.nav).forEach(function (el) { return el && (el.hidden = !this$1.maxIndex); });

                this.updateNav();

            },

            events: ['resize']

        },

        events: [

            {

                name: 'click',

                delegate: function() {
                    return this.selNavItem;
                },

                handler: function(e) {
                    e.preventDefault();
                    this.show(uikitUtil.data(e.current, this.attrItem));
                }

            },

            {

                name: 'itemshow',
                handler: 'updateNav'

            }

        ],

        methods: {

            updateNav: function() {
                var this$1 = this;


                var i = this.getValidIndex();
                this.navItems.forEach(function (el) {

                    var cmd = uikitUtil.data(el, this$1.attrItem);

                    uikitUtil.toggleClass(el, this$1.clsActive, uikitUtil.toNumber(cmd) === i);
                    uikitUtil.toggleClass(el, 'uk-invisible', this$1.finite && (cmd === 'previous' && i === 0 || cmd === 'next' && i >= this$1.maxIndex));
                });

            }

        }

    };

    var Slider = {

        mixins: [SliderAutoplay, SliderDrag, SliderNav],

        props: {
            clsActivated: Boolean,
            easing: String,
            index: Number,
            finite: Boolean,
            velocity: Number,
            selSlides: String
        },

        data: function () { return ({
            easing: 'ease',
            finite: false,
            velocity: 1,
            index: 0,
            prevIndex: -1,
            stack: [],
            percent: 0,
            clsActive: 'uk-active',
            clsActivated: false,
            Transitioner: false,
            transitionOptions: {}
        }); },

        connected: function() {
            this.prevIndex = -1;
            this.index = this.getValidIndex(this.$props.index);
            this.stack = [];
        },

        disconnected: function() {
            uikitUtil.removeClass(this.slides, this.clsActive);
        },

        computed: {

            duration: function(ref, $el) {
                var velocity = ref.velocity;

                return speedUp($el.offsetWidth / velocity);
            },

            list: function(ref, $el) {
                var selList = ref.selList;

                return uikitUtil.$(selList, $el);
            },

            maxIndex: function() {
                return this.length - 1;
            },

            selSlides: function(ref) {
                var selList = ref.selList;
                var selSlides = ref.selSlides;

                return (selList + " " + (selSlides || '> *'));
            },

            slides: {

                get: function() {
                    return uikitUtil.$$(this.selSlides, this.$el);
                },

                watch: function() {
                    this.$reset();
                }

            },

            length: function() {
                return this.slides.length;
            }

        },

        events: {

            itemshown: function() {
                this.$update(this.list);
            }

        },

        methods: {

            show: function(index, force) {
                var this$1 = this;
                if ( force === void 0 ) force = false;


                if (this.dragging || !this.length) {
                    return;
                }

                var ref = this;
                var stack = ref.stack;
                var queueIndex = force ? 0 : stack.length;
                var reset = function () {
                    stack.splice(queueIndex, 1);

                    if (stack.length) {
                        this$1.show(stack.shift(), true);
                    }
                };

                stack[force ? 'unshift' : 'push'](index);

                if (!force && stack.length > 1) {

                    if (stack.length === 2) {
                        this._transitioner.forward(Math.min(this.duration, 200));
                    }

                    return;
                }

                var prevIndex = this.getIndex(this.index);
                var prev = uikitUtil.hasClass(this.slides, this.clsActive) && this.slides[prevIndex];
                var nextIndex = this.getIndex(index, this.index);
                var next = this.slides[nextIndex];

                if (prev === next) {
                    reset();
                    return;
                }

                this.dir = getDirection(index, prevIndex);
                this.prevIndex = prevIndex;
                this.index = nextIndex;

                if (prev && !uikitUtil.trigger(prev, 'beforeitemhide', [this])
                    || !uikitUtil.trigger(next, 'beforeitemshow', [this, prev])
                ) {
                    this.index = this.prevIndex;
                    reset();
                    return;
                }

                var promise = this._show(prev, next, force).then(function () {

                    prev && uikitUtil.trigger(prev, 'itemhidden', [this$1]);
                    uikitUtil.trigger(next, 'itemshown', [this$1]);

                    return new uikitUtil.Promise(function (resolve) {
                        uikitUtil.fastdom.write(function () {
                            stack.shift();
                            if (stack.length) {
                                this$1.show(stack.shift(), true);
                            } else {
                                this$1._transitioner = null;
                            }
                            resolve();
                        });
                    });

                });

                prev && uikitUtil.trigger(prev, 'itemhide', [this]);
                uikitUtil.trigger(next, 'itemshow', [this]);

                return promise;

            },

            getIndex: function(index, prev) {
                if ( index === void 0 ) index = this.index;
                if ( prev === void 0 ) prev = this.index;

                return uikitUtil.clamp(uikitUtil.getIndex(index, this.slides, prev, this.finite), 0, this.maxIndex);
            },

            getValidIndex: function(index, prevIndex) {
                if ( index === void 0 ) index = this.index;
                if ( prevIndex === void 0 ) prevIndex = this.prevIndex;

                return this.getIndex(index, prevIndex);
            },

            _show: function(prev, next, force) {

                this._transitioner = this._getTransitioner(
                    prev,
                    next,
                    this.dir,
                    uikitUtil.assign({
                        easing: force
                            ? next.offsetWidth < 600
                                ? 'cubic-bezier(0.25, 0.46, 0.45, 0.94)' /* easeOutQuad */
                                : 'cubic-bezier(0.165, 0.84, 0.44, 1)' /* easeOutQuart */
                            : this.easing
                    }, this.transitionOptions)
                );

                if (!force && !prev) {
                    this._translate(1);
                    return uikitUtil.Promise.resolve();
                }

                var ref = this.stack;
                var length = ref.length;
                return this._transitioner[length > 1 ? 'forward' : 'show'](length > 1 ? Math.min(this.duration, 75 + 75 / (length - 1)) : this.duration, this.percent);

            },

            _getDistance: function(prev, next) {
                return this._getTransitioner(prev, prev !== next && next).getDistance();
            },

            _translate: function(percent, prev, next) {
                if ( prev === void 0 ) prev = this.prevIndex;
                if ( next === void 0 ) next = this.index;

                var transitioner = this._getTransitioner(prev !== next ? prev : false, next);
                transitioner.translate(percent);
                return transitioner;
            },

            _getTransitioner: function(prev, next, dir, options) {
                if ( prev === void 0 ) prev = this.prevIndex;
                if ( next === void 0 ) next = this.index;
                if ( dir === void 0 ) dir = this.dir || 1;
                if ( options === void 0 ) options = this.transitionOptions;

                return new this.Transitioner(
                    uikitUtil.isNumber(prev) ? this.slides[prev] : prev,
                    uikitUtil.isNumber(next) ? this.slides[next] : next,
                    dir * (uikitUtil.isRtl ? -1 : 1),
                    options
                );
            }

        }

    };

    function getDirection(index, prevIndex) {
        return index === 'next'
            ? 1
            : index === 'previous'
                ? -1
                : index < prevIndex
                    ? -1
                    : 1;
    }

    function speedUp(x) {
        return .5 * x + 300; // parabola through (400,500; 600,600; 1800,1200)
    }

    var Slideshow = {

        mixins: [Slider],

        props: {
            animation: String
        },

        data: {
            animation: 'slide',
            clsActivated: 'uk-transition-active',
            Animations: Animations,
            Transitioner: Transitioner
        },

        computed: {

            animation: function(ref) {
                var animation = ref.animation;
                var Animations = ref.Animations;

                return uikitUtil.assign(Animations[animation] || Animations.slide, {name: animation});
            },

            transitionOptions: function() {
                return {animation: this.animation};
            }

        },

        events: {

            'itemshow itemhide itemshown itemhidden': function(ref) {
                var target = ref.target;

                this.$update(target);
            },

            beforeitemshow: function(ref) {
                var target = ref.target;

                uikitUtil.addClass(target, this.clsActive);
            },

            itemshown: function(ref) {
                var target = ref.target;

                uikitUtil.addClass(target, this.clsActivated);
            },

            itemhidden: function(ref) {
                var target = ref.target;

                uikitUtil.removeClass(target, this.clsActive, this.clsActivated);
            }

        }

    };

    var Animations$1 = uikitUtil.assign({}, Animations, {

        fade: {

            show: function() {
                return [
                    {opacity: 0, zIndex: 0},
                    {zIndex: -1}
                ];
            },

            percent: function(current) {
                return 1 - uikitUtil.css(current, 'opacity');
            },

            translate: function(percent) {
                return [
                    {opacity: 1 - percent, zIndex: 0},
                    {zIndex: -1}
                ];
            }

        },

        scale: {

            show: function() {
                return [
                    {opacity: 0, transform: scale3d(1 + .5), zIndex: 0},
                    {zIndex: -1}
                ];
            },

            percent: function(current) {
                return 1 - uikitUtil.css(current, 'opacity');
            },

            translate: function(percent) {
                return [
                    {opacity: 1 - percent, transform: scale3d(1 + .5 * percent), zIndex: 0},
                    {zIndex: -1}
                ];
            }

        },

        pull: {

            show: function(dir) {
                return dir < 0
                    ? [
                        {transform: translate(30), zIndex: -1},
                        {transform: translate(), zIndex: 0}
                    ]
                    : [
                        {transform: translate(-100), zIndex: 0},
                        {transform: translate(), zIndex: -1}
                    ];
            },

            percent: function(current, next, dir) {
                return dir < 0
                    ? 1 - translated(next)
                    : translated(current);
            },

            translate: function(percent, dir) {
                return dir < 0
                    ? [
                        {transform: translate(30 * percent), zIndex: -1},
                        {transform: translate(-100 * (1 - percent)), zIndex: 0}
                    ]
                    : [
                        {transform: translate(-percent * 100), zIndex: 0},
                        {transform: translate(30 * (1 - percent)), zIndex: -1}
                    ];
            }

        },

        push: {

            show: function(dir) {
                return dir < 0
                    ? [
                        {transform: translate(100), zIndex: 0},
                        {transform: translate(), zIndex: -1}
                    ]
                    : [
                        {transform: translate(-30), zIndex: -1},
                        {transform: translate(), zIndex: 0}
                    ];
            },

            percent: function(current, next, dir) {
                return dir > 0
                    ? 1 - translated(next)
                    : translated(current);
            },

            translate: function(percent, dir) {
                return dir < 0
                    ? [
                        {transform: translate(percent * 100), zIndex: 0},
                        {transform: translate(-30 * (1 - percent)), zIndex: -1}
                    ]
                    : [
                        {transform: translate(-30 * percent), zIndex: -1},
                        {transform: translate(100 * (1 - percent)), zIndex: 0}
                    ];
            }

        }

    });

    var SliderReactive = {

        update: {

            write: function() {

                if (this.stack.length || this.dragging) {
                    return;
                }

                var index = this.getValidIndex(this.index);

                if (!~this.prevIndex || this.index !== index) {
                    this.show(index);
                }

            },

            events: ['resize']

        }

    };

    var Component = {

        mixins: [Class, Slideshow, SliderReactive],

        props: {
            ratio: String,
            minHeight: Number,
            maxHeight: Number
        },

        data: {
            ratio: '16:9',
            minHeight: false,
            maxHeight: false,
            selList: '.uk-slideshow-items',
            attrItem: 'uk-slideshow-item',
            selNav: '.uk-slideshow-nav',
            Animations: Animations$1
        },

        update: {

            read: function() {

                var ref = this.ratio.split(':').map(Number);
                var width = ref[0];
                var height = ref[1];

                height = height * this.list.offsetWidth / width || 0;

                if (this.minHeight) {
                    height = Math.max(this.minHeight, height);
                }

                if (this.maxHeight) {
                    height = Math.min(this.maxHeight, height);
                }

                return {height: height - uikitUtil.boxModelAdjust(this.list, 'height', 'content-box')};
            },

            write: function(ref) {
                var height = ref.height;

                height > 0 && uikitUtil.css(this.list, 'minHeight', height);
            },

            events: ['resize']

        }

    };

    if (typeof window !== 'undefined' && window.UIkit) {
        window.UIkit.component('slideshow', Component);
    }

    return Component;

})));