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import { Class } from '../mixin/index';
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import { $, Animation, isNumeric, isString, offsetTop, query, requestAnimationFrame } from '../util/index';
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export default function (UIkit) {
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UIkit.component('sticky', {
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mixins: [Class],
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attrs: true,
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props: {
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top: null,
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bottom: Boolean,
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offset: Number,
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animation: String,
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clsActive: String,
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clsInactive: String,
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clsFixed: String,
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widthElement: 'jQuery',
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showOnUp: Boolean,
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media: 'media',
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target: Number
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},
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defaults: {
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top: 0,
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bottom: false,
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offset: 0,
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animation: '',
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clsActive: 'uk-active',
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clsInactive: '',
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clsFixed: 'uk-sticky-fixed',
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widthElement: false,
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showOnUp: false,
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media: false,
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target: false
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},
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connected() {
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this.placeholder = $('<div class="uk-sticky-placeholder"></div>');
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this.widthElement = this.$props.widthElement || this.placeholder;
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if (!this.isActive) {
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this.$el.addClass(this.clsInactive);
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}
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},
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disconnected() {
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if (this.isActive) {
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this.isActive = false;
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this.hide();
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this.$el.removeClass(this.clsInactive);
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}
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this.placeholder.remove();
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this.placeholder = null;
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this.widthElement = null;
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},
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ready() {
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if (!(this.target && location.hash && window.pageYOffset > 0)) {
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return;
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}
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var target = query(location.hash);
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if (target) {
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requestAnimationFrame(() => {
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var top = offsetTop(target),
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elTop = offsetTop(this.$el),
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elHeight = this.$el[0].offsetHeight,
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elBottom = elTop + elHeight;
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if (elBottom >= top && elTop <= top + target[0].offsetHeight) {
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window.scrollTo(0, top - elHeight - this.target - this.offset);
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}
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});
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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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var outerHeight = this.$el[0].offsetHeight, el;
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this.placeholder
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.css('height', this.$el.css('position') !== 'absolute' ? outerHeight : '')
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.css(this.$el.css(['marginTop', 'marginBottom', 'marginLeft', 'marginRight']));
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if (!document.documentElement.contains(this.placeholder[0])) {
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this.placeholder.insertAfter(this.$el).attr('hidden', true);
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}
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this.width = this.widthElement.attr('hidden', null)[0].offsetWidth;
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this.widthElement.attr('hidden', !this.isActive);
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this.topOffset = offsetTop(this.isActive ? this.placeholder : this.$el);
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this.bottomOffset = this.topOffset + outerHeight;
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['top', 'bottom'].forEach(prop => {
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this[prop] = this.$props[prop];
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if (!this[prop]) {
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return;
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}
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if (isNumeric(this[prop])) {
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this[prop] = this[`${prop}Offset`] + parseFloat(this[prop]);
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} else {
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if (isString(this[prop]) && this[prop].match(/^-?\d+vh$/)) {
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this[prop] = window.innerHeight * parseFloat(this[prop]) / 100;
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} else {
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el = this[prop] === true ? this.$el.parent() : query(this[prop], this.$el);
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if (el) {
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this[prop] = offsetTop(el) + el[0].offsetHeight;
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}
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}
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}
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});
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this.top = Math.max(parseFloat(this.top), this.topOffset) - this.offset;
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this.bottom = this.bottom && this.bottom - outerHeight;
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this.inactive = this.media && !window.matchMedia(this.media).matches;
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if (this.isActive) {
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this.update();
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}
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},
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events: ['load', 'resize']
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},
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{
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read() {
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this.offsetTop = offsetTop(this.$el)
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},
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write({dir} = {}) {
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var scroll = window.pageYOffset;
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if (scroll < 0 || !this.$el.is(':visible') || this.disabled || this.showOnUp && !dir) {
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return;
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}
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if (this.inactive
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|| scroll < this.top
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|| this.showOnUp && (scroll <= this.top || dir ==='down' || dir === 'up' && !this.isActive && scroll <= this.bottomOffset)
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) {
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if (!this.isActive) {
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return;
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}
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this.isActive = false;
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if (this.animation && this.bottomOffset < this.offsetTop) {
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Animation.cancel(this.$el).then(() => Animation.out(this.$el, this.animation).then(() => this.hide()));
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} else {
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this.hide();
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}
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} else if (this.isActive) {
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this.update();
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} else if (this.animation) {
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Animation.cancel(this.$el).then(() => {
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this.show();
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Animation.in(this.$el, this.animation);
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});
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} else {
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this.show();
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}
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},
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events: ['scroll']
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},
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],
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methods: {
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show() {
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this.isActive = true;
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this.update();
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this.$el.trigger('active');
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this.placeholder.attr('hidden', null);
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},
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hide() {
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this.$el
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.addClass(this.clsInactive)
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.removeClass(this.clsFixed)
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.removeClass(this.clsActive)
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.css({position: '', top: '', width: ''})
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.trigger('inactive');
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this.placeholder.attr('hidden', true);
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},
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update() {
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var top = Math.max(0, this.offset), scroll = window.pageYOffset, active = scroll > this.top;
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if (this.bottom && scroll > this.bottom - this.offset) {
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top = this.bottom - scroll;
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}
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this.$el
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.css({
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position: 'fixed',
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top: `${top}px`,
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width: this.width
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})
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.addClass(this.clsFixed)
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.toggleClass(this.clsActive, active)
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.toggleClass(this.clsInactive, !active);
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}
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}
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});
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}
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