dnet45/modules/uoa-repository-dashboard-gui/trunk/src/public/js/core/scrollspy.js @ 46812
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import { $, isInView } from '../util/index'; |
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export default function (UIkit) { |
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UIkit.component('scrollspy', { |
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args: 'cls', |
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props: { |
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cls: 'list', |
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target: String, |
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hidden: Boolean, |
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offsetTop: Number, |
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offsetLeft: Number, |
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repeat: Boolean, |
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delay: Number |
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},
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defaults: { |
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cls: ['uk-scrollspy-inview'], |
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target: false, |
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hidden: true, |
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offsetTop: 0, |
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offsetLeft: 0, |
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repeat: false, |
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delay: 0, |
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inViewClass: 'uk-scrollspy-inview' |
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},
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init() { |
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this.$emitSync(); |
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},
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computed: { |
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elements() { |
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return this.target && $(this.target, this.$el) || this.$el; |
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}
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},
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update: [ |
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{
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write() { |
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if (this.hidden) { |
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this.elements.filter(`:not(.${this.inViewClass})`).css('visibility', 'hidden'); |
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}
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}
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},
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{
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read() { |
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this.elements.each((_, el) => { |
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if (!el._scrollspy) { |
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var cls = $(el).attr('uk-scrollspy-class'); |
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el._scrollspy = {toggles: cls && cls.split(',') || this.cls}; |
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}
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el._scrollspy.show = isInView(el, this.offsetTop, this.offsetLeft); |
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});
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},
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write() { |
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var index = this.elements.length === 1 ? 1 : 0; |
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this.elements.each((_, el) => { |
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var $el = $(el); |
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var data = el._scrollspy; |
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if (data.show) { |
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if (!data.inview && !data.timer) { |
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data.timer = setTimeout(() => { |
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$el.css('visibility', '') |
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.addClass(this.inViewClass) |
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.toggleClass(data.toggles[0]) |
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.trigger('inview'); |
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data.inview = true; |
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delete data.timer; |
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}, this.delay * index++); |
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}
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} else { |
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if (data.inview && this.repeat) { |
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if (data.timer) { |
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clearTimeout(data.timer); |
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delete data.timer; |
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}
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$el.removeClass(this.inViewClass) |
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.toggleClass(data.toggles[0]) |
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.css('visibility', this.hidden ? 'hidden' : '') |
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.trigger('outview'); |
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data.inview = false; |
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}
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}
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data.toggles.reverse(); |
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});
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},
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events: ['scroll', 'load', 'resize'] |
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}
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]
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});
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}
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