299 lines
10 KiB
HTML
299 lines
10 KiB
HTML
<h1 class="sr-only">{label}</h1>
|
|
<!-- for debugging
|
|
<div style="padding:5px;position:fixed;left:0;top:0;z-index:999999999;font-size:0.9em;width: 75vw;background:rgba(0, 0, 0, 0.8);color:white;pointer-events:none;">
|
|
<p>$timelineItemIds: {JSON.stringify(($timelineItemIds || []).map(_ => '...' + _.slice(-6)), null, ' ')}</p>
|
|
<p>$itemIdsToAdd: {JSON.stringify(($itemIdsToAdd || []).map(_ => '...' + _.slice(-6)), null, ' ')}</p>
|
|
<p>$runningUpdate: {$runningUpdate}</p>
|
|
</div>
|
|
-->
|
|
<div class="timeline"
|
|
role="feed"
|
|
on:focusWithCapture="saveFocus(event)"
|
|
on:blurWithCapture="clearFocus(event)"
|
|
>
|
|
{#await componentsPromise}
|
|
<!-- awaiting promise -->
|
|
{:then result}
|
|
<svelte:component this={result.listComponent}
|
|
component={result.listItemComponent}
|
|
realm="{$currentInstance + '/' + timeline}"
|
|
{makeProps}
|
|
items={$timelineItemIds}
|
|
showFooter={true}
|
|
footerComponent={LoadingFooter}
|
|
showHeader={$showHeader}
|
|
headerComponent={MoreHeaderVirtualWrapper}
|
|
{headerProps}
|
|
{scrollToItem}
|
|
on:scrollToBottom="onScrollToBottom()"
|
|
on:scrollToTop="onScrollToTop()"
|
|
on:scrollTopChanged="onScrollTopChanged(event)"
|
|
on:initialized="initialize()"
|
|
on:noNeedToScroll="onNoNeedToScroll()"
|
|
/>
|
|
{:catch error}
|
|
<div>Error: component failed to load! Try reloading. {error}</div>
|
|
{/await}
|
|
</div>
|
|
<script>
|
|
import { store } from '../../_store/store'
|
|
import Status from '../status/Status.html'
|
|
import LoadingFooter from './LoadingFooter.html'
|
|
import MoreHeaderVirtualWrapper from './MoreHeaderVirtualWrapper.html'
|
|
import {
|
|
importVirtualList,
|
|
importList,
|
|
importStatusVirtualListItem,
|
|
importNotificationVirtualListItem
|
|
} from '../../_utils/asyncModules'
|
|
import { timelines } from '../../_static/timelines'
|
|
import {
|
|
fetchTimelineItemsOnScrollToBottom,
|
|
setupTimeline,
|
|
showMoreItemsForTimeline,
|
|
showMoreItemsForThread,
|
|
showMoreItemsForCurrentTimeline
|
|
} from '../../_actions/timeline'
|
|
import { focusWithCapture, blurWithCapture } from '../../_utils/events'
|
|
import { scheduleIdleTask } from '../../_utils/scheduleIdleTask'
|
|
import { mark, stop } from '../../_utils/marks'
|
|
import isEqual from 'lodash-es/isEqual'
|
|
import { doubleRAF } from '../../_utils/doubleRAF'
|
|
import { observe } from 'svelte-extras'
|
|
import { createMakeProps } from '../../_actions/createMakeProps'
|
|
|
|
export default {
|
|
oncreate () {
|
|
console.log('timeline oncreate()')
|
|
this.setupFocus()
|
|
setupTimeline()
|
|
this.restoreFocus()
|
|
this.setupStreaming()
|
|
},
|
|
ondestroy () {
|
|
console.log('ondestroy')
|
|
this.teardownFocus()
|
|
},
|
|
data: () => ({
|
|
LoadingFooter,
|
|
MoreHeaderVirtualWrapper,
|
|
Status,
|
|
scrollTop: 0
|
|
}),
|
|
computed: {
|
|
// For threads, it's simpler to just render all items as a pseudo-virtual list
|
|
// due to need to scroll to the right item and thus calculate all item heights up-front.
|
|
// Here we lazy-load both the virtual list component itself as well as the component
|
|
// it renders.
|
|
componentsPromise: ({ timelineType }) => {
|
|
return Promise.all([
|
|
timelineType === 'status'
|
|
? importList()
|
|
: importVirtualList(),
|
|
timelineType === 'notifications'
|
|
? importNotificationVirtualListItem()
|
|
: importStatusVirtualListItem()
|
|
]).then(results => ({
|
|
listComponent: results[0],
|
|
listItemComponent: results[1]
|
|
}))
|
|
},
|
|
makeProps: ({ $currentInstance, timelineType, timelineValue }) => (
|
|
createMakeProps($currentInstance, timelineType, timelineValue)
|
|
),
|
|
label: ({ timeline, $currentInstance, timelineType, timelineValue }) => {
|
|
if (timelines[timeline]) {
|
|
return `Statuses: ${timelines[timeline].label} timeline on ${$currentInstance}`
|
|
}
|
|
|
|
switch (timelineType) {
|
|
case 'tag':
|
|
return `Statuses: #${timelineValue} hashtag`
|
|
case 'status':
|
|
return `Statuses: thread`
|
|
case 'account':
|
|
return `Statuses: account timeline`
|
|
case 'list':
|
|
return `Statuses: list`
|
|
case 'notifications':
|
|
return `Notifications on ${$currentInstance}`
|
|
}
|
|
},
|
|
timelineType: ({ timeline }) => {
|
|
return timeline.split('/')[0]
|
|
},
|
|
timelineValue: ({ timeline }) => {
|
|
return timeline.split('/').slice(-1)[0]
|
|
},
|
|
// Scroll to the first item if this is a "status in own thread" timeline.
|
|
// Don't scroll to the first item because it obscures the "back" button.
|
|
scrollToItem: ({ timelineType, timelineValue, $firstTimelineItemId }) => (
|
|
timelineType === 'status' && $firstTimelineItemId &&
|
|
timelineValue !== $firstTimelineItemId && timelineValue
|
|
),
|
|
itemIdsToAdd: ({ $itemIdsToAdd }) => $itemIdsToAdd,
|
|
headerProps: ({ itemIdsToAdd }) => {
|
|
return {
|
|
count: itemIdsToAdd ? itemIdsToAdd.length : 0,
|
|
onClick: showMoreItemsForCurrentTimeline
|
|
}
|
|
}
|
|
},
|
|
store: () => store,
|
|
events: {
|
|
focusWithCapture,
|
|
blurWithCapture
|
|
},
|
|
methods: {
|
|
observe,
|
|
initialize () {
|
|
let { initializeStarted } = this.get()
|
|
if (initializeStarted) {
|
|
return
|
|
}
|
|
this.set({ initializeStarted: true })
|
|
mark('initializeTimeline')
|
|
doubleRAF(() => {
|
|
console.log('timeline initialized')
|
|
this.store.set({ timelineInitialized: true })
|
|
stop('initializeTimeline')
|
|
})
|
|
},
|
|
onScrollTopChanged (scrollTop) {
|
|
this.set({ scrollTop: scrollTop })
|
|
},
|
|
onScrollToBottom () {
|
|
let { timelineType } = this.get()
|
|
let { timelineInitialized, runningUpdate } = this.store.get()
|
|
if (!timelineInitialized ||
|
|
runningUpdate ||
|
|
timelineType === 'status') { // for status contexts, we've already fetched the whole thread
|
|
return
|
|
}
|
|
let { currentInstance } = this.store.get()
|
|
let { timeline } = this.get()
|
|
fetchTimelineItemsOnScrollToBottom(
|
|
currentInstance,
|
|
timeline
|
|
)
|
|
},
|
|
onScrollToTop () {
|
|
let { shouldShowHeader } = this.store.get()
|
|
if (shouldShowHeader) {
|
|
this.store.setForCurrentTimeline({
|
|
showHeader: true,
|
|
shouldShowHeader: false
|
|
})
|
|
}
|
|
},
|
|
setupStreaming () {
|
|
let { currentInstance } = this.store.get()
|
|
let { timeline, timelineType } = this.get()
|
|
let handleItemIdsToAdd = () => {
|
|
let { itemIdsToAdd } = this.get()
|
|
if (!itemIdsToAdd || !itemIdsToAdd.length) {
|
|
return
|
|
}
|
|
mark('handleItemIdsToAdd')
|
|
let { scrollTop } = this.get()
|
|
let {
|
|
shouldShowHeader,
|
|
showHeader
|
|
} = this.store.get()
|
|
if (timelineType === 'status') {
|
|
// this is a thread, just insert the statuses already
|
|
showMoreItemsForThread(currentInstance, timeline)
|
|
} else if (scrollTop === 0 && !shouldShowHeader && !showHeader) {
|
|
// if the user is scrolled to the top and we're not showing the header, then
|
|
// just insert the statuses. this is "chat room mode"
|
|
showMoreItemsForTimeline(currentInstance, timeline)
|
|
} else {
|
|
// user hasn't scrolled to the top, show a header instead
|
|
this.store.setForTimeline(currentInstance, timeline, { shouldShowHeader: true })
|
|
}
|
|
stop('handleItemIdsToAdd')
|
|
}
|
|
this.observe('itemIdsToAdd', (newItemIdsToAdd, oldItemIdsToAdd) => {
|
|
if (!newItemIdsToAdd ||
|
|
!newItemIdsToAdd.length ||
|
|
isEqual(newItemIdsToAdd, oldItemIdsToAdd)) {
|
|
return
|
|
}
|
|
scheduleIdleTask(handleItemIdsToAdd)
|
|
})
|
|
},
|
|
setupFocus () {
|
|
this.onPushState = this.onPushState.bind(this)
|
|
this.store.setForCurrentTimeline({
|
|
ignoreBlurEvents: false
|
|
})
|
|
window.addEventListener('pushState', this.onPushState)
|
|
},
|
|
teardownFocus () {
|
|
window.removeEventListener('pushState', this.onPushState)
|
|
},
|
|
onPushState () {
|
|
this.store.setForCurrentTimeline({ ignoreBlurEvents: true })
|
|
},
|
|
saveFocus (e) {
|
|
try {
|
|
let { currentInstance } = this.store.get()
|
|
let { timeline } = this.get()
|
|
let lastFocusedElementSelector
|
|
let activeElement = e.target
|
|
if (activeElement) {
|
|
let focusKey = activeElement.getAttribute('focus-key')
|
|
if (focusKey) {
|
|
lastFocusedElementSelector = `[focus-key=${JSON.stringify(focusKey)}]`
|
|
}
|
|
}
|
|
console.log('saving focus to ', lastFocusedElementSelector)
|
|
this.store.setForTimeline(currentInstance, timeline, {
|
|
lastFocusedElementSelector
|
|
})
|
|
} catch (err) {
|
|
console.error('unable to save focus', err)
|
|
}
|
|
},
|
|
clearFocus () {
|
|
try {
|
|
let { ignoreBlurEvents } = this.store.get()
|
|
if (ignoreBlurEvents) {
|
|
return
|
|
}
|
|
console.log('clearing focus')
|
|
let { currentInstance } = this.store.get()
|
|
let { timeline } = this.get()
|
|
this.store.setForTimeline(currentInstance, timeline, {
|
|
lastFocusedElementSelector: null
|
|
})
|
|
} catch (err) {
|
|
console.error('unable to clear focus', err)
|
|
}
|
|
},
|
|
restoreFocus () {
|
|
let { lastFocusedElementSelector } = this.store.get()
|
|
if (!lastFocusedElementSelector) {
|
|
return
|
|
}
|
|
console.log('restoreFocus', lastFocusedElementSelector)
|
|
requestAnimationFrame(() => {
|
|
requestAnimationFrame(() => {
|
|
let element = document.querySelector(lastFocusedElementSelector)
|
|
if (element) {
|
|
element.focus()
|
|
}
|
|
})
|
|
})
|
|
},
|
|
onNoNeedToScroll () {
|
|
// If the timeline doesn't need to scroll, then we can safely "preinitialize,"
|
|
// i.e. render anything above the fold of the timeline. This avoids the affect
|
|
// where the scrollable content appears to jump around if we need to scroll it.
|
|
console.log('timeline preinitialized')
|
|
this.store.set({ timelinePreinitialized: true })
|
|
}
|
|
}
|
|
}
|
|
</script>
|