82 lines
2.2 KiB
HTML
82 lines
2.2 KiB
HTML
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<:Window bind:innerHeight />
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<div class="container" on:scroll="onScroll(event)" on:fullscreen="onFullscreenChange()" ref:node>
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<slot></slot>
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</div>
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<script>
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import { virtualListStore } from '../_utils/virtualListStore'
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import debounce from 'lodash/debounce'
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import throttle from 'lodash/throttle'
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import { isFullscreen, attachFullscreenListener, detachFullscreenListener } from '../_utils/fullscreen'
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import { mark, stop } from '../_utils/marks'
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const SCROLL_EVENT_DELAY = 300
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const RESIZE_EVENT_DELAY = 700
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export default {
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oncreate() {
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mark('onCreate VirtualListContainer')
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let node = this.refs.node
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this.observe('innerHeight', debounce(() => {
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// respond to window resize events
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this.store.set({
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offsetHeight: node.offsetHeight
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})
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}, RESIZE_EVENT_DELAY))
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this.store.set({
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scrollTop: node.scrollTop,
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scrollHeight: node.scrollHeight,
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offsetHeight: node.offsetHeight
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})
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stop('onCreate VirtualListContainer')
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},
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store: () => virtualListStore,
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events: {
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scroll(node, callback) {
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const onScroll = throttle(event => {
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mark('onScroll')
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if (this.get('fullscreen')) {
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return
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}
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callback(event)
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stop('onScroll')
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}, SCROLL_EVENT_DELAY, {
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leading: true,
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trailing: true
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})
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node.addEventListener('scroll', onScroll)
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return {
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teardown() {
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node.removeEventListener('scroll', onScroll)
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}
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}
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},
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fullscreen(node, callback) {
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const onFullscreen = (() => {
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callback()
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})
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attachFullscreenListener(onFullscreen)
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return {
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teardown() {
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detachFullscreenListener(onFullscreen)
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}
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}
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}
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},
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methods: {
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onScroll(event) {
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this.store.set({
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scrollTop: event.target.scrollTop,
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scrollHeight: event.target.scrollHeight
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})
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},
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onFullscreenChange() {
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mark('onFullscreenChange')
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console.log('is fullscreen? ', isFullscreen())
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this.set({ fullscreen: isFullscreen() })
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stop('onFullscreenChange')
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}
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}
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};
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</script>
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